Tower-type solar thermal utilization system

Abstract

A tower-type solar thermal utilization system, comprising a heat utilization system, a primary solar collector system, and at least one secondary solar collector system. The primary solar collector system and each secondary solar collector system each comprise a solar collector module. Each solar collector module comprises a heliostat field module (201), a solar receiver module (3), a first low-temperature thermal storage unit (4) and a first low-temperature thermal storage medium conveying pump module (5). In each solar collector module, the first low-temperature thermal storage medium conveying pump module (5) conveys a low-temperature thermal storage medium in the first low-temperature thermal storage unit (4) to the solar receiver module (3) by means of a tenth pipeline (22), and the first low-temperature thermal storage unit (4) receives a low-temperature thermal storage medium from a low-temperature thermal storage medium output end of the heat utilization system by means of a seventh pipeline (26). The distance between a low-temperature thermal storage medium input end of the first low-temperature thermal storage unit (4) in the primary solar collector system and the low-temperature thermal storage medium output end of the heat utilization system is less than the distance between a low-temperature thermal storage medium input end of the first low-temperature thermal storage unit (4) in any secondary solar collector system and the low-temperature thermal storage medium output end of the heat utilization system.

Description

Tower solar thermal utilization system

[0001] This application claims priority to the Chinese patent application No. 202410529268.8 filed on April 29, 2024 with the Chinese Patent Office, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of solar thermal utilization, for example, to a tower solar thermal utilization system. BACKGROUND

[0003] Solar energy, as a clean and renewable new energy, is increasingly widely used in production and life. Tower solar thermal utilization technology is an emerging solar energy utilization technology, which converts low-temperature thermal storage medium into high-temperature thermal storage medium through a tower solar thermal collection system (each solar thermal collection system includes a heliostat field and a corresponding heat absorber arranged on an absorption tower), and then transports the high-temperature thermal storage medium to a heat utilization system to release heat, so as to realize the utilization of solar energy.

[0004] Through the analysis and research on the economy of tower solar thermal utilization systems of different scales, it is considered that the cost can be significantly reduced by expanding the installed capacity of the tower solar thermal utilization system. However, with the expansion of the installed capacity, in the case of using a single tower solar thermal collection system design in the tower solar thermal utilization system, the area of the heliostat field and the scale of the heat absorber also need to be expanded, thereby leading to a downward trend of the heat collection efficiency of the tower solar thermal collection system, and at the same time, due to the increase of the scale of the heat absorber, the manufacturing difficulty is greatly increased, which further limits the scale of the single tower solar thermal collection system.

[0005] Based on the above reasons, people have proposed a multi-tower-one-machine solution, that is, multiple tower solar thermal collection systems jointly provide heat energy for a set of heat utilization system, but the cost of realizing energy transfer between the multiple tower solar thermal collection systems and the heat utilization system is high. SUMMARY

[0006] The present application provides a tower solar thermal utilization system, which can effectively reduce the requirements for the heat storage medium conveying pipeline between the tower solar thermal collection system and the heat utilization system, thereby effectively reducing the cost.

[0007] The embodiment of the present application provides a tower type solar heat utilization system, which comprises a heat utilization system, a main heat collecting system and at least one auxiliary heat collecting system; in the main heat collecting system and each auxiliary heat collecting system, a heat collecting module is comprised; in each heat collecting module, a heliostat field module and a heat absorbing module arranged on an absorbing tower are comprised, the heliostat field module is arranged to track the sun and reflect the sunlight to the heat absorbing module, the heat absorbing module is arranged to heat a low-temperature heat storage medium in the heat absorbing module by using the sunlight reflected by the heliostat field module, so as to convert the low-temperature heat storage medium in the heat absorbing module into a high-temperature heat storage medium, and the high-temperature heat storage medium in the heat absorbing module is output to a high-temperature heat storage medium input end of the heat utilization system; in each heat collecting module, a first heat storage module is further comprised, the first heat storage module comprises a first low-temperature heat storage unit arranged to store the low-temperature heat storage medium and a low-temperature heat storage medium conveying pump module arranged to convey the low-temperature heat storage medium in the first low-temperature heat storage unit to a low-temperature heat storage medium input end of the heat absorbing module; in each heat collecting module, a tenth pipeline is further comprised; in each heat collecting module, the low-temperature heat storage medium in the first low-temperature heat storage unit is conveyed to the low-temperature heat storage medium input end of the heat absorbing module by the tenth pipeline under the driving of the low-temperature heat storage medium conveying pump module; in each heat collecting module, a seventh pipeline is further comprised; in each heat collecting module, the first low-temperature heat storage unit receives the low-temperature heat storage medium output from a low-temperature heat storage medium output end of the heat utilization system through the seventh pipeline; the distance between the low-temperature heat storage medium input end of the first low-temperature heat storage unit in the main heat collecting system and the low-temperature heat storage medium output end of the heat utilization system is less than the distance between the low-temperature heat storage medium input end of the first low-temperature heat storage unit in any auxiliary heat collecting system and the low-temperature heat storage medium output end of the heat utilization system.

[0008] In an embodiment, the distance between the low-temperature heat storage medium input end of the heat absorbing module in the main heat collecting system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit in the main heat collecting system is less than the distance between the low-temperature heat storage medium input end of the heat absorbing module in any auxiliary heat collecting system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit in the main heat collecting system; the distance between the low-temperature heat storage medium input end of the heat absorbing module in the main heat collecting system and the low-temperature heat storage medium output end of the heat utilization system is less than the distance between the low-temperature heat storage medium input end of the heat absorbing module in any auxiliary heat collecting system and the low-temperature heat storage medium output end of the heat utilization system; taking any auxiliary heat collecting system as a second characteristic auxiliary heat collecting system, the distance between the low-temperature heat storage medium input end of the heat absorbing module in the second characteristic auxiliary heat collecting system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit in the second characteristic auxiliary heat collecting system is less than the distance between the low-temperature heat storage medium input end of the first low-temperature heat storage unit in the second characteristic auxiliary heat collecting system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit in the main heat collecting system.

[0009] In an embodiment, in each of the sub heat collection systems, the low-temperature heat storage medium input end of the first low-temperature heat storage unit is connected to the low-temperature heat storage medium output end of the heat utilization system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit in the main heat collection system through the seventh pipeline respectively; or, in each of the sub heat collection systems, the low-temperature heat storage medium input end of the first low-temperature heat storage unit is connected to the low-temperature heat storage medium output end of the first low-temperature heat storage unit in the main heat collection system through the seventh pipeline; the low-temperature heat storage medium in the first low-temperature heat storage unit in the main heat collection system can enter the seventh pipeline in each of the sub heat collection systems under the drive of the first low-temperature heat storage medium conveying pump module in the main heat collection system; in each of the sub heat collection systems, when the flow rates of the low-temperature heat storage medium in the seventh pipeline and the tenth pipeline are the same, the maximum flow allowed by the tenth pipeline is greater than the maximum flow allowed by the seventh pipeline.

[0010] In an embodiment, the first heat storage module in the main heat collection system further comprises a second low-temperature heat storage medium conveying pump module, which is configured to convey the low-temperature heat storage medium in the first low-temperature heat storage unit in the main heat collection system to the first low-temperature heat storage unit in each of the sub heat collection systems; in each of the sub heat collection systems, the low-temperature heat storage medium input end of the first low-temperature heat storage unit is connected to the low-temperature heat storage medium output end of the heat utilization system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit in the main heat collection system through the seventh pipeline respectively; or, in each of the sub heat collection systems, the low-temperature heat storage medium input end of the first low-temperature heat storage unit is connected to the low-temperature heat storage medium output end of the first low-temperature heat storage unit in the main heat collection system through the seventh pipeline; the low-temperature heat storage medium in the first low-temperature heat storage unit in the main heat collection system can enter the seventh pipeline in each of the sub heat collection systems under the drive of the second low-temperature heat storage medium conveying pump module; in each of the sub heat collection systems, when the flow rates of the low-temperature heat storage medium in the seventh pipeline and the tenth pipeline are the same, the maximum flow allowed by the tenth pipeline is greater than the maximum flow allowed by the seventh pipeline.

[0011] In an embodiment, in each of the sub heat collection systems, the nominal diameter of the tenth pipeline is greater than the nominal diameter of the seventh pipeline.

[0012] In an embodiment, the heat storage capacity of the first low-temperature heat storage unit in the main heat collection system is greater than or equal to the heat storage capacity of the first low-temperature heat storage unit in any one of the sub heat collection systems.

[0013] In an embodiment, in the case that the flow rate of the low-temperature thermal storage medium in the seventh pipeline in the main heat collection system and in the seventh pipeline in each of the auxiliary heat collection systems is the same, the maximum flow allowed by the seventh pipeline in the main heat collection system is greater than the maximum flow allowed by the seventh pipeline in any one of the auxiliary heat collection systems.

[0014] In an embodiment, in each of the heat collection modules, the high-temperature thermal storage medium output end of the heat absorption module is further connected to the low-temperature thermal storage medium input end of the first low-temperature thermal storage unit through a ninth pipeline.

[0015] In an embodiment, in each of the heat collection modules, the first thermal storage module further comprises a first high-temperature thermal storage unit configured to store high-temperature thermal storage medium and a first high-temperature thermal storage medium delivery pump module configured to pump out the high-temperature thermal storage medium in the first high-temperature thermal storage unit; in each of the heat collection modules, a first pipeline and a second pipeline are further included; in each of the heat collection modules, the high-temperature thermal storage medium output from the heat absorption module is delivered to the first high-temperature thermal storage unit through the first pipeline, and the high-temperature thermal storage medium in the first high-temperature thermal storage unit is delivered to the heat utilization system through the second pipeline under the drive of the first high-temperature thermal storage medium delivery pump module; in each of the auxiliary heat collection systems, in the case that the flow rate of the high-temperature thermal storage medium in the first pipeline and the second pipeline is the same, the maximum flow allowed by the first pipeline is greater than the maximum flow allowed by the second pipeline.

[0016] In an embodiment, the distance between the high-temperature thermal storage medium output end of the first high-temperature thermal storage unit in the main heat collection system and the high-temperature thermal storage medium input end of the heat utilization system is less than the distance between the high-temperature thermal storage medium output end of the first high-temperature thermal storage unit in any one of the auxiliary heat collection systems and the high-temperature thermal storage medium input end of the heat utilization system.

[0017] In an embodiment, in each of the auxiliary heat collection systems, a third pipeline is further included; in each of the auxiliary heat collection systems, the high-temperature thermal storage medium output end of the heat absorption module is further connected to the second pipeline through the third pipeline.

[0018] In an embodiment, in each of the auxiliary heat collection systems, a fifth pipeline is further included; in each of the auxiliary heat collection systems, the high-temperature thermal storage medium input end of the fifth pipeline is connected to the high-temperature thermal storage medium output end of the heat absorption module, and the high-temperature thermal storage medium output end of the fifth pipeline is connected to the high-temperature thermal storage medium input end of the first pipeline and the high-temperature thermal storage medium input end of the third pipeline, respectively.

[0019] In an embodiment, the distance between the high-temperature heat storage medium output end of the heat absorption module in the main heat collection system and the high-temperature heat storage medium input end of the first high-temperature heat storage unit in the main heat collection system is less than the distance between the high-temperature heat storage medium output end of the heat absorption module in any one of the auxiliary heat collection systems and the high-temperature heat storage medium input end of the first high-temperature heat storage unit in the main heat collection system; the distance between the high-temperature heat storage medium output end of the heat absorption module in the main heat collection system and the high-temperature heat storage medium input end of the heat utilization system is less than the distance between the high-temperature heat storage medium output end of the heat absorption module in any one of the auxiliary heat collection systems and the high-temperature heat storage medium input end of the heat utilization system; taking any one of the auxiliary heat collection systems as a first characteristic auxiliary heat collection system, the distance between the high-temperature heat storage medium output end of the heat absorption module in the first characteristic auxiliary heat collection system and the high-temperature heat storage medium input end of the first high-temperature heat storage unit in the first characteristic auxiliary heat collection system is less than the distance between the high-temperature heat storage medium output end of the first high-temperature heat storage unit in the first characteristic auxiliary heat collection system and the high-temperature heat storage medium input end of the first high-temperature heat storage unit in the main heat collection system.

[0020] In an embodiment, the high-temperature heat storage medium output end of the second pipeline in each of the auxiliary heat collection systems is connected to the high-temperature heat storage medium input end of the first high-temperature heat storage unit in the main heat collection system; or, in each of the auxiliary heat collection systems, the high-temperature heat storage medium output end of the second pipeline is connected to the high-temperature heat storage medium input end of the heat utilization system through a sixth pipeline, and the high-temperature heat storage medium output end of the second pipeline is also connected to the high-temperature heat storage medium input end of the first high-temperature heat storage unit in the main heat collection system through a fourth pipeline.

[0021] In an embodiment, in each of the auxiliary heat collection systems, the nominal diameter of the first pipeline is greater than the nominal diameter of the second pipeline.

[0022] In an embodiment, in the case that the high-temperature heat storage medium flow rate in the connection pipeline between the high-temperature heat storage medium output end of the first high-temperature heat storage unit in the main heat collection system and the high-temperature heat storage medium input end of the heat utilization system and the high-temperature heat storage medium flow rate in the second pipeline in each of the auxiliary heat collection systems are the same, the maximum flow rate that can be allowed by the connection pipeline between the high-temperature heat storage medium output end of the first high-temperature heat storage unit in the main heat collection system and the high-temperature heat storage medium input end of the heat utilization system is greater than the maximum flow rate that can be allowed by the second pipeline in any one of the auxiliary heat collection systems.

[0023] In an embodiment, the heat storage capacity of the first high-temperature heat storage unit in the main heat collection system is greater than or equal to the heat storage capacity of the first high-temperature heat storage unit in any one of the auxiliary heat collection systems.

[0024] In an embodiment, the main heat collection system further comprises a twenty-third pipeline; in the main heat collection system, the high-temperature heat storage medium output end of the heat absorption module is connected to the high-temperature heat storage medium input end of the heat utilization system through the twenty-third pipeline.

[0025] In an embodiment, the main heat collection system further comprises a twenty-fifth pipeline; in the main heat collection system, the high-temperature heat storage medium input end of the twenty-fifth pipeline is connected to the high-temperature heat storage medium output end of the heat absorption module, and the high-temperature heat storage medium output end of the twenty-fifth pipeline is connected to the high-temperature heat storage medium input end of the first pipeline and the high-temperature heat storage medium input end of the twenty-third pipeline, respectively.

[0026] In an embodiment, in each of the auxiliary heat collection systems, a first valve is arranged on the first pipeline, a second valve is arranged on the second pipeline, and a third valve is arranged on the third pipeline; in each of the auxiliary heat collection systems, the connection point of the third pipeline and the second pipeline is a first connection point, the third valve is arranged between the first connection point and the high-temperature heat storage medium input end of the third pipeline, and the second valve is arranged between the first connection point and the high-temperature heat storage medium output end of the first high-temperature heat storage medium delivery pump module.

[0027] In an embodiment, a twenty-third valve is arranged on the twenty-third pipeline.

[0028] In an embodiment, in each of the auxiliary heat collection systems, a fourth valve is arranged on the fourth pipeline, and a sixth valve is arranged on the sixth pipeline.

[0029] In an embodiment, the heat utilization system comprises a heat exchange system and a steam turbine generator unit, and the heat exchange system is arranged to transfer heat in the high-temperature heat storage medium to water working substance, thereby generating high-temperature and high-pressure steam to drive the steam turbine generator unit to operate. BRIEF DESCRIPTION OF DRAWINGS

[0030] FIG. 1 is a schematic diagram of a tower type solar thermal utilization system according to an embodiment.

[0031] FIG. 2 is a schematic diagram of a tower type solar thermal utilization system according to an embodiment.

[0032] FIG. 3 is a schematic diagram of a tower type solar thermal utilization system according to an embodiment.

[0033] Fig. 4 is a schematic diagram of another tower type solar thermal power system in Example 3. 1 - heliostat, 2 - heat absorbing tower, 3 - heat absorbing module, 4 - first low temperature heat storage unit, 5 - first low temperature heat storage medium conveying pump module, 6 - first high temperature heat storage unit, 7 - first high temperature heat storage medium conveying pump module, 8 - second thirteen pipeline, 9 - second thirteen valve, 10 - heat exchange system, 11 - steam turbine generator set, 12 - second fifteen pipeline, 13 - second low temperature heat storage medium conveying pump module, 101 - ninth valve, 102 - first valve, 103 - third valve, 104 - second valve, 105 - fourth valve, 106 - sixth valve, 107 - eleventh valve, 109 - seventh valve, 110 - twelfth valve, 201 - heliostat field module, 21 - fifth pipeline, 22 - tenth pipeline, 23 - ninth pipeline, 24 - first pipeline, 25 - second pipeline, 26 - seventh pipeline, 27 - third pipeline, 28 - fourth pipeline, 29 - sixth pipeline, 31 - eleventh pipeline, 32 - twelfth pipeline. DETAILED DESCRIPTION

[0034] The following examples will facilitate the understanding of this application for those skilled in the art, but in no way limit the application. It should be noted that changes and improvements can be made by those skilled in the art without departing from the concept of the application. These all belong to the protection scope of the application.

[0035] Some directional terms used in the following to describe the drawings, such as "inner", "outer", "upper", "lower", "top", "bottom" and other directional terms will be understood to have their normal meanings and refer to those directions involved when normally viewing the drawings. Unless otherwise specified, the directional terms described in the specification are basically in the conventional direction as understood by those skilled in the art.

[0036] In this application, unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the meaning of the above terms in this application can be understood according to the situation.

[0037] Example 1

[0038] As shown in Fig. 1, a tower type solar thermal utilization system comprises a heat using system, a main heat collecting system and at least one auxiliary heat collecting system, each of the main heat collecting system and the auxiliary heat collecting system comprises a heat collecting module. In each heat collecting module, a heliostat field module 201 and a heat absorbing module 3 arranged on an absorbing tower 2 are included, the heliostat field module 201 comprises a plurality of heliostats 1 arranged to track the sun and reflect the sunlight to the heat absorbing module 3, the heat absorbing module 3 is arranged to heat a low temperature heat storage medium in the heat absorbing module 3 by the sunlight reflected by the heliostat field module 201 to convert the low temperature heat storage medium in the heat absorbing module 3 into a high temperature heat storage medium, and the high temperature heat storage medium in the heat absorbing module 3 is output to a high temperature heat storage medium input end of the heat using system. It should be noted that the heliostat module 201 and the heat absorbing module 3 mentioned in the description above belong to the same heat collecting module.

[0039] In each heat collecting module, a first heat storage module is further included, the first heat storage module further comprises a first low temperature heat storage unit 4 arranged to store the low temperature heat storage medium and a first low temperature heat storage medium conveying pump module 5 arranged to pump the low temperature heat storage medium in the first low temperature heat storage unit 4 to the low temperature heat storage medium input end of the heat absorbing module 3, wherein in the embodiment, the first low temperature heat storage medium conveying pump module 5 is arranged on the corresponding first low temperature heat storage unit 4; in each heat collecting module, a tenth pipeline 22 is further included; in each heat collecting module, the low temperature heat storage medium in the first low temperature heat storage unit 4 is conveyed to the low temperature heat storage medium input end of the heat absorbing module 3 by the tenth pipeline 22 under the driving of the first low temperature heat storage medium conveying pump module 5; in each heat collecting module, a seventh pipeline 26 is further included; in each heat collecting module, the first low temperature heat storage unit 4 receives the low temperature heat storage medium output from the low temperature heat storage medium output end of the heat using system through the seventh pipeline 26. The distance between the low temperature heat storage medium input end of the first low temperature heat storage unit 4 in the main heat collecting system and the low temperature heat storage medium output end of the heat using system is less than the distance between the low temperature heat storage medium input end of the first low temperature heat storage unit 4 in any auxiliary heat collecting system and the low temperature heat storage medium output end of the heat using system.

[0040] As shown in FIG. 1, in the present embodiment, a seventh valve 109 is arranged on the seventh pipeline 26 in each heat collection module, and the seventh valve 109 is arranged to control the shutoff, communication and flow regulation of the seventh pipeline 26. In addition, it should be noted that in the present embodiment, the first low-temperature heat storage unit 4 is a single storage tank, and of course, in other embodiments, the first low-temperature heat storage unit 4 can also be a partial space in a storage tank, for example, a storage tank simultaneously includes a high-temperature heat storage medium storage space and a low-temperature heat storage medium storage space which are separated from each other, wherein the low-temperature heat storage medium storage space is the first low-temperature heat storage unit 4 as referred to herein. It should be particularly noted that the first low-temperature heat storage medium conveying pump module 5 can be a single first low-temperature heat storage medium conveying pump, or a pump group including two or more first low-temperature heat storage medium conveying pumps; when the first low-temperature heat storage medium conveying pump module 5 includes two or more first low-temperature heat storage medium conveying pumps, the first low-temperature heat storage medium conveying pumps can be standby for each other, or can work simultaneously to achieve the functions required by the first low-temperature heat storage medium conveying pump module 5.

[0041] In addition, as shown in FIG. 1, in the present embodiment, a main heat collection system and an auxiliary heat collection system are arranged, and of course, in other embodiments, the number of auxiliary heat collection systems can also be 2, 3, 4 or more, which is not limited in the present application. The heat utilization system in the present embodiment includes a heat exchange system 10 and a steam turbine generator set 11, and the heat exchange system 10 is arranged to transfer the heat in the high-temperature heat storage medium from each tower type solar heat collection system to a water working medium, and then generate high-temperature and high-pressure steam to drive the steam turbine generator set 11 to operate. Of course, in other embodiments, the heat utilization system can also be other devices or systems capable of utilizing the heat in the high-temperature heat storage medium, which is not limited in the present application.

[0042] By setting the first low-temperature heat storage unit 4 and the first low-temperature heat storage medium conveying pump module 5 in each heat collection module, the low-temperature heat storage medium output by the heat using system can be timely received and stored, and then the low-temperature heat storage medium is conveyed to the corresponding heat absorption module 3 by each first low-temperature heat storage medium conveying pump module 5. With this design, the low-temperature heat storage medium output from the low-temperature heat storage medium output end of the heat using system does not directly enter each heat absorption module 3, but first enters each first low-temperature heat storage unit 4, and then enters the corresponding heat absorption module 3 of each first low-temperature heat storage unit 4, so that the low-temperature heat storage medium output from the heat using system can be conveyed in sections, thereby reducing the requirement for the driving capacity of the driving device arranged to drive the flow of low-temperature heat storage medium in each seventh pipeline 26, reducing the design and manufacturing difficulty, and reducing the cost. In addition, with this scheme, the influence of the operation of the heat using system on the operation of each heat absorption module 3 (for example, the heat absorption module 3 needs to be operated at high load, but the heat using system is limited by grid peak shaving or other limitations, and cannot provide enough low-temperature heat storage medium for the heat absorption module 3) can be effectively reduced, so that the operation of each heat absorption module 3 can be more flexibly adjusted.

[0043] In addition, by arranging the first low-temperature heat storage unit 4 in the main heat collection system near the heat using system, the length of the conveying pipeline (i.e., the seventh pipeline 26 in the main heat collection system) between the low-temperature heat storage medium input end of the first low-temperature heat storage unit 4 in the main heat collection system and the low-temperature heat storage medium output end of the heat using system can be effectively reduced. By reducing the length of the conveying pipeline, the cost can be effectively reduced.

[0044] As shown in FIG. 1, in the present embodiment, the distance between the low-temperature heat storage medium input end of the heat absorption module 3 in the main heat collection system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit 4 in the main heat collection system is less than the distance between the low-temperature heat storage medium input end of the heat absorption module 3 in any auxiliary heat collection system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit 4 in the main heat collection system. With this scheme, the length of the connecting pipeline (i.e., the tenth pipeline 22 in the main heat collection system) between the low-temperature heat storage medium input end of the heat absorption module 3 in the main heat collection system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit 4 in the main heat collection system can be shortened, thereby reducing the cost.

[0045] As shown in FIG. 1, in the present embodiment, the distance between the low-temperature heat storage medium input end of the heat absorption module 3 in the main heat collection system and the low-temperature heat storage medium output end of the heat utilization system is less than the distance between the low-temperature heat storage medium input end of the heat absorption module 3 in any one of the auxiliary heat collection systems and the low-temperature heat storage medium output end of the heat utilization system. With this scheme, the length of the connecting pipeline between the low-temperature heat storage medium input end of the heat absorption module 3 in the main heat collection system and the low-temperature heat storage medium output end of the heat utilization system (in the present embodiment, the length of the connecting pipeline is the sum of the lengths of the seventh pipeline 26 and the tenth pipeline 22 in the main heat collection system) can be shortened, and the cost can be reduced.

[0046] As shown in FIG. 1, in the present embodiment, the second characteristic auxiliary heat collection system is any one of the auxiliary heat collection systems, and the distance between the low-temperature heat storage medium input end of the heat absorption module 3 in the second characteristic auxiliary heat collection system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit 4 in the second characteristic auxiliary heat collection system is less than the distance between the low-temperature heat storage medium input end of the first low-temperature heat storage unit 4 in the second characteristic auxiliary heat collection system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit 4 in the main heat collection system. With this scheme, the first low-temperature heat storage unit 4 in each auxiliary heat collection system can be close to the heat absorption module 3 in the auxiliary heat collection system in which it is located, while being far away from the first low-temperature heat storage unit 4 in the main heat collection system, and the length of the connecting pipeline (i.e., the tenth pipeline 22 in the auxiliary heat collection system) between the low-temperature heat storage medium input end of the heat absorption module 3 in each auxiliary heat collection system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit 4 in the auxiliary heat collection system in which it is located can be shortened, and the cost can be reduced.

[0047] As shown in FIG. 1, in the present embodiment, the first heat storage medium conveying pump module 13 is further included in the first heat storage module in the main heat collection system, and is configured to pump the low-temperature heat storage medium in the first low-temperature heat storage unit 4 in the main heat collection system to the first low-temperature heat storage unit 4 in each auxiliary heat collection system. In each auxiliary heat collection system, the low-temperature heat storage medium input end of the first low-temperature heat storage unit 4 is connected to the low-temperature heat storage medium output end of the seventh pipeline 26, the low-temperature heat storage medium input end of the seventh pipeline 26 is connected to the low-temperature heat storage medium output end of the heat utilization system through the eleventh pipeline 31, and the low-temperature heat storage medium input end of the seventh pipeline 26 is further connected to the low-temperature heat storage medium output end of the first low-temperature heat storage unit 4 in the main heat collection system through the twelfth pipeline 32; or, in each auxiliary heat collection system, the low-temperature heat storage medium input end of the first low-temperature heat storage unit 4 is connected to the low-temperature heat storage medium output end of the seventh pipeline 26, and the low-temperature heat storage medium input end of the seventh pipeline 26 is connected to the low-temperature heat storage medium output end of the first low-temperature heat storage unit 4 in the main heat collection system. The low-temperature heat storage medium in the first low-temperature heat storage unit 4 in the main heat collection system can enter the seventh pipeline 26 in each auxiliary heat collection system under the drive of the second low-temperature heat storage medium conveying pump module 13; in each auxiliary heat collection system, when the flow rates of the low-temperature heat storage medium in the seventh pipeline 26 and the tenth pipeline 22 are the same, the maximum flow allowed by the tenth pipeline 22 is greater than the maximum flow allowed by the seventh pipeline 26. As shown in FIG. 1, in the present embodiment, the eleventh valve 107 is arranged on each eleventh pipeline 31, and the twelfth valve 110 is arranged on each twelfth pipeline 32, the eleventh valve 107 is configured to control the shutoff, communication and flow adjustment of the corresponding eleventh pipeline 31, and the twelfth valve 110 is configured to control the shutoff, communication and flow adjustment of the corresponding twelfth pipeline 32.

[0048] It should be particularly noted that the second low-temperature heat storage medium delivery pump module 13 can be a single second low-temperature heat storage medium delivery pump or a pump group containing two or more second low-temperature heat storage medium delivery pumps; when the second low-temperature heat storage medium delivery pump module 13 contains two or more second low-temperature heat storage medium delivery pumps, among which, there can be a case where a second low-temperature heat storage medium delivery pump is used as a backup, a case where a second low-temperature heat storage medium delivery pump supplies low-temperature heat storage medium to the first low-temperature heat storage unit 4 in a sub heat collection system, a case where multiple second low-temperature heat storage medium delivery pumps supply low-temperature heat storage medium to the first low-temperature heat storage unit 4 in a sub heat collection system at the same time, and a case where a second low-temperature heat storage medium delivery pump supplies low-temperature heat storage medium to the first low-temperature heat storage unit 4 in multiple sub heat collection systems at the same time, which is not limited here (for example, in an embodiment, the second low-temperature heat storage medium delivery pump module 13 contains two second low-temperature heat storage medium delivery pumps, and the entire tower type solar heat utilization system includes two sub heat collection systems, then the two second low-temperature heat storage medium delivery pumps are respectively and correspondingly arranged with the first low-temperature heat storage unit 4 in the two sub heat collection systems, that is, a second low-temperature heat storage medium delivery pump supplies low-temperature heat storage medium to the first low-temperature heat storage unit 4 in a sub heat collection system alone).

[0049] It should also be particularly noted that whether the low-temperature heat storage medium output by the heat utilization system is delivered to the corresponding first low-temperature heat storage unit 4 through the seventh pipeline 26 directly or is first pumped into the first low-temperature heat storage unit 4 in the main heat collection system and then pumped out to the seventh pipeline 26 in the sub heat collection system through the second low-temperature heat storage medium delivery pump module 13 before being delivered to the corresponding first low-temperature heat storage unit 4, the ultimate goal is to deliver the low-temperature heat storage medium output by the heat utilization system to each first low-temperature heat storage unit 4, therefore, in each heat collection module, the above methods and their combinations belong to the implementation method of the low-temperature heat storage medium output by the low-temperature heat storage medium output end of the first low-temperature heat storage unit 4 through the corresponding seventh pipeline 26. In addition, since the low-temperature heat storage medium output by the low-temperature heat storage medium output end of the heat utilization system will all enter the first low-temperature heat storage unit 4 in the main heat collection system under some operating conditions, therefore, the seventh pipeline 26 in the main heat collection system needs to have the ability to completely receive the low-temperature heat storage medium output by the heat utilization system when the heat utilization system is running at maximum load.

[0050] In actual tower type solar heat utilization system, the heat using system and the heat absorbing module 3 in each heat collecting module are not always operated synchronously. For example, during the night or rainy days, the heat absorbing module 3 in each heat collecting module is stopped, while the heat using system is in operation, or the heat using system is stopped due to grid peak shaving or actual operation requirement, while the heat absorbing module 3 in each heat collecting module is in operation. The present embodiment takes full advantage of the feature that the heat using system and the heat absorbing module 3 in each heat collecting module are not always operated synchronously. On the basis of arranging the first low temperature heat storage unit 4 in the main heat collecting system and each auxiliary heat collecting system, the low temperature heat storage medium input end of the seventh pipeline 26 in each auxiliary heat collecting system is connected with the low temperature heat storage medium output end of the first low temperature heat storage unit 4 in the main heat collecting system. By time-sharing the low temperature heat storage medium in the first low temperature heat storage unit 4 in the heat using system or the main heat collecting system to the first low temperature heat storage unit 4 in each auxiliary heat collecting system, the requirement for the maximum flow allowed by the seventh pipeline 26 in each auxiliary heat collecting system can be reduced without affecting the normal operation of the heat using system and the heat absorbing module 3, and thus the cost of the seventh pipeline 26 in each auxiliary heat collecting system can be reduced. The reason why the requirement for the maximum flow allowed by the seventh pipeline 26 in each auxiliary heat collecting system can be reduced without affecting the normal operation of the heat using system and the heat absorbing module 3 is that: (A) the first low temperature heat storage unit 4 in the main heat collecting system can receive all or part of the low temperature heat storage medium output by the heat using system through the seventh pipeline 26 in the main heat collecting system, and reduce the maximum flow allowed by the seventh pipeline 26 in each auxiliary heat collecting system without causing the low temperature heat storage medium output by the heat using system to be unable to be output in time and affecting the normal operation; (B) the first low temperature heat storage unit 4 in each auxiliary heat collecting system can provide all or part of the low temperature heat storage medium to the corresponding heat absorbing module 3 according to the actual operation requirement of the corresponding heat absorbing module 3. Therefore, reducing the maximum flow allowed by the seventh pipeline 26 in each auxiliary heat collecting system will not affect the normal operation of the heat absorbing module 3 in each auxiliary heat collecting system due to insufficient low temperature heat storage medium provided by the heat using system to the heat absorbing module 3 in each auxiliary heat collecting system; (C) when the heat using system is stopped or operated at low load, the low temperature heat storage medium output by the heat using system and the low temperature heat storage medium stored in the first low temperature heat storage unit 4 in the main heat collecting system are delivered to the first low temperature heat storage unit 4 in each auxiliary heat collecting system through the corresponding seventh pipeline 26, thereby supplementing the low temperature heat storage medium in the first low temperature heat storage unit 4 in each auxiliary heat collecting system, and at the same time, the first low temperature heat storage unit 4 in the main heat collecting system releases space for receiving excess low temperature heat storage medium output by the heat using system, thereby enabling the functions in (A) and (B) to be normally performed.

[0051] In the present embodiment, in each auxiliary heat collecting system, the nominal diameter of the tenth pipeline 22 is greater than the nominal diameter of the seventh pipeline 26.

[0052] As shown in FIG. 1, in the present embodiment, the heat storage capacity of the first low-temperature heat storage unit 4 in the main heat collection system is greater than or equal to the heat storage capacity of the first low-temperature heat storage unit 4 in any one of the auxiliary heat collection systems.

[0053] As shown in FIG. 1, in the present embodiment, in the case where the low-temperature heat medium flow rates of the seventh pipelines 26 in the main heat collection system and the seventh pipelines 26 in each of the auxiliary heat collection systems are the same, the maximum flow rate that can be allowed by the seventh pipeline 26 in the main heat collection system is greater than the maximum flow rate that can be allowed by the seventh pipeline 26 in any one of the auxiliary heat collection systems. Since the low-temperature heat medium output from the low-temperature heat medium output end of the self-use heat system will all enter the first low-temperature heat storage unit 4 in the main heat collection system under some operating conditions, the seventh pipeline 26 in the main heat collection system needs to have the capability of being able to completely receive the low-temperature heat medium output by the heat use system when the heat use system is operated at maximum load. Therefore, the unit length cost of the seventh pipeline 26 in the main heat collection system is relatively high, and in the foregoing of the present embodiment, it has been indicated that the first low-temperature heat storage unit 6 in the main heat collection system is arranged near the heat use system, so that the length of the seventh pipeline 26 in the main heat collection system with a relatively high unit length cost can be shortened, and the cost can be further reduced.

[0054] As shown in FIG. 1, in the present embodiment, in each heat collection module, the high-temperature heat medium output end of the heat absorption module 3 is further connected to the low-temperature heat medium input end of the first low-temperature heat storage unit 4 through a ninth pipeline 23. In the present embodiment, a ninth valve 101 is arranged on each ninth pipeline 23, and the ninth valve 101 is arranged to control the shutoff, communication and flow rate adjustment of the corresponding ninth pipeline 23. In the main heat collection system and each auxiliary heat collection system, when the heat absorption module 3 is in the starting stage or the solar energy reflected by the heliostat field module 201 to the heat absorption module 3 is insufficient, the temperature of the heat storage medium output from the high-temperature heat medium output end of the heat absorption module 3 cannot meet the preset requirement. By arranging the ninth pipeline 23 in the main heat collection system and each auxiliary heat collection system, the heat storage medium output from the high-temperature heat medium output end of the heat absorption module 3 that does not meet the temperature requirement can be re-entered into the corresponding first low-temperature heat storage unit 4, and then be transported to the corresponding heat absorption module 3 by the corresponding first low-temperature heat medium transport pump module 5 to be reheated to obtain high-temperature heat storage medium that meets the temperature requirement.

[0055] Embodiment 2

[0056] As shown in Fig. 2, a tower type solar thermal utilization system comprises a heat utilization system, a main heat collection system and at least one auxiliary heat collection system, and each of the main heat collection system and the auxiliary heat collection system comprises a heat collection module. In each heat collection module, a heliostat field module 201 is arranged to track the sun and reflect the sunlight to a heat absorption module 3 arranged on a heat absorption tower 2, and the heat absorption module 3 is arranged to heat a low-temperature heat storage medium in the heat absorption module 3 by using the sunlight reflected by the heliostat field module 201, so as to convert the low-temperature heat storage medium in the heat absorption module 3 into a high-temperature heat storage medium, and the high-temperature heat storage medium in the heat absorption module 3 is output to a high-temperature heat storage medium input end of the heat utilization system. It should be noted that the heliostat module 201 and the heat absorption module 3 mentioned in the description above belong to the same heat collection module.

[0057] In each heat collection module, a first heat storage module is further included, and the first heat storage module further comprises a first low-temperature heat storage unit 4 arranged to store the low-temperature heat storage medium and a first low-temperature heat storage medium conveying pump module 5 arranged to pump the low-temperature heat storage medium in the first low-temperature heat storage unit 4 to the low-temperature heat storage medium input end of the heat absorption module 3. In the embodiment, the first low-temperature heat storage medium conveying pump module 5 is arranged on the corresponding first low-temperature heat storage unit 4. In each heat collection module, a tenth pipeline 22 is further included. In each heat collection module, the low-temperature heat storage medium in the first low-temperature heat storage unit 4 is conveyed to the low-temperature heat storage medium input end of the heat absorption module 3 by the first low-temperature heat storage medium conveying pump module 5 through the tenth pipeline 22. In each heat collection module, a seventh pipeline 26 is further included. In each heat collection module, the first low-temperature heat storage unit 4 receives the low-temperature heat storage medium output from the low-temperature heat storage medium output end of the heat utilization system through the seventh pipeline 26. The distance between the low-temperature heat storage medium input end of the first low-temperature heat storage unit 4 in the main heat collection system and the low-temperature heat storage medium output end of the heat utilization system is less than the distance between the low-temperature heat storage medium input end of the first low-temperature heat storage unit 4 in any auxiliary heat collection system and the low-temperature heat storage medium output end of the heat utilization system.

[0058] As shown in Fig. 2, in the embodiment, a seventh valve 109 is arranged on the seventh pipeline 26 in each heat collection module, and the seventh valve 109 is arranged to control the on-off and flow regulation of the seventh pipeline 26. In addition, it should be noted that in the embodiment, the first low-temperature heat storage unit 4 is a single storage tank. Of course, in other embodiments, the first low-temperature heat storage unit 4 can also be a partial space in a storage tank, for example, a storage tank simultaneously comprises a high-temperature heat storage medium storage space and a low-temperature heat storage medium storage space which are separated from each other, and the low-temperature heat storage medium storage space is the first low-temperature heat storage unit 4 mentioned herein.

[0059] Further, as shown in FIG. 2, in the present embodiment, one main heat collection system and one auxiliary heat collection system are provided, of course, in other embodiments, the number of heat collection modules can also be 2, 3, 4 or more, which is not limited in the present application. The heat utilization system in the present embodiment includes a heat exchange system 10 and a steam turbine generator set 11, the heat exchange system 10 is configured to transfer the heat in the high-temperature heat storage medium from each tower type solar heat collection system to the water working medium, thereby generating high-temperature and high-pressure steam to drive the steam turbine generator set 11 to operate. Of course, in other embodiments, the heat utilization system can also be other devices or systems capable of utilizing the heat in the high-temperature heat storage medium, which is not limited in the present application.

[0060] By providing the first low-temperature heat storage unit 4 and the first low-temperature heat storage medium conveying pump module 5 in each heat collection module, the low-temperature heat storage medium output by the heat utilization system can be timely received and stored, and then conveyed to the corresponding heat absorption module 3 by the first low-temperature heat storage medium conveying pump module 5. With this design, the low-temperature heat storage medium output from the low-temperature heat storage medium output end of the heat utilization system does not directly enter each heat absorption module 3, but first enters each first low-temperature heat storage unit 4, and then enters the corresponding heat absorption module 3 of each first low-temperature heat storage unit 4, so that the low-temperature heat storage medium output from the heat utilization system can be conveyed in segments, thereby reducing the requirement for the driving capacity of the driving device configured to drive the flow of low-temperature heat storage medium in each seventh pipeline 26, reducing the design and manufacturing difficulty, and reducing the cost. In addition, with this scheme, the influence of the operation of the heat utilization system on the operation of each heat absorption module 3 (such as: the heat absorption module 3 needs to be operated at high load, but the heat utilization system is limited by grid peak shaving or other limitations, and cannot provide enough low-temperature heat storage medium for the heat absorption module 3) can be effectively reduced, so that the operation of each heat absorption module 3 can be more flexibly adjusted.

[0061] In addition, the distance between the low-temperature heat storage medium input end of the first low-temperature heat storage unit 4 in the main heat collection system and the low-temperature heat storage medium output end of the heat utilization system is less than the distance between the low-temperature heat storage medium input end of the first low-temperature heat storage unit 4 in any auxiliary heat collection system and the low-temperature heat storage medium output end of the heat utilization system. With such a setting, the first low-temperature heat storage unit 4 in the main heat collection system is arranged near the heat utilization system, which can effectively reduce the length of the conveying pipeline (i.e. the seventh pipeline 26 in the main heat collection system) between the low-temperature heat storage medium input end of the first low-temperature heat storage unit 4 in the main heat collection system and the low-temperature heat storage medium output end of the heat utilization system. By reducing the length of the conveying pipeline, the cost can be effectively reduced.

[0062] As shown in FIG. 2, in the present embodiment, the distance between the low-temperature thermal storage medium input end of the heat-absorbing module 3 in the main heat collection system and the low-temperature thermal storage medium output end of the first low-temperature thermal storage unit 4 in the main heat collection system is smaller than the distance between the low-temperature thermal storage medium input end of the heat-absorbing module 3 in any one of the auxiliary heat collection systems and the low-temperature thermal storage medium output end of the first low-temperature thermal storage unit 4 in the main heat collection system. With this scheme, the length of the connecting pipeline between the low-temperature thermal storage medium input end of the heat-absorbing module 3 in the main heat collection system and the low-temperature thermal storage medium output end of the first low-temperature thermal storage unit 4 in the main heat collection system (i.e., the tenth pipeline 22 in the main heat collection system) can be shortened, and thus the cost can be reduced.

[0063] As shown in FIG. 2, in the present embodiment, the distance between the low-temperature thermal storage medium input end of the heat-absorbing module 3 in the main heat collection system and the low-temperature thermal storage medium output end of the heat utilization system is smaller than the distance between the low-temperature thermal storage medium input end of the heat-absorbing module 3 in any one of the auxiliary heat collection systems and the low-temperature thermal storage medium output end of the heat utilization system. With this scheme, the length of the connecting pipeline between the low-temperature thermal storage medium input end of the heat-absorbing module 3 in the main heat collection system and the low-temperature thermal storage medium output end of the heat utilization system (in the present embodiment, the length of the connecting pipeline is the sum of the lengths of the seventh pipeline 26 and the tenth pipeline 22 in the main heat collection system) can be shortened, and thus the cost can be reduced.

[0064] As shown in FIG. 2, in the present embodiment, any one of the auxiliary heat collection systems is taken as a second characteristic auxiliary heat collection system, and the distance between the low-temperature thermal storage medium input end of the heat-absorbing module 3 in the second characteristic auxiliary heat collection system and the low-temperature thermal storage medium output end of the first low-temperature thermal storage unit 4 in the second characteristic auxiliary heat collection system is smaller than the distance between the low-temperature thermal storage medium input end of the first low-temperature thermal storage unit 4 in the second characteristic auxiliary heat collection system and the low-temperature thermal storage medium output end of the first low-temperature thermal storage unit 4 in the main heat collection system. With this scheme, the first low-temperature thermal storage unit 4 in each auxiliary heat collection system can be close to the heat-absorbing module 3 in the auxiliary heat collection system where the first low-temperature thermal storage unit 4 is located, while being far away from the first low-temperature thermal storage unit 4 in the main heat collection system, and thus the length of the connecting pipeline between the low-temperature thermal storage medium input end of the heat-absorbing module 3 in each auxiliary heat collection system and the low-temperature thermal storage medium output end of the first low-temperature thermal storage unit 4 in the auxiliary heat collection system where the heat-absorbing module 3 is located (i.e., the tenth pipeline 22 in the auxiliary heat collection system) can be shortened, and thus the cost can be reduced.

[0065] As shown in FIG. 2, in the present embodiment, in each of the sub heat collection systems, the low-temperature heat storage medium input end of the first low-temperature heat storage unit 4 is connected with the low-temperature heat storage medium output end of the seventh pipeline 26, the low-temperature heat storage medium input end of the seventh pipeline 26 is connected with the low-temperature heat storage medium output end of the heat utilization system through the eleventh pipeline 31, and the low-temperature heat storage medium input end of the seventh pipeline 26 is also connected with the low-temperature heat storage medium output end of the first low-temperature heat storage unit 4 in the main heat collection system through the twelfth pipeline 32; or, in each of the sub heat collection systems, the low-temperature heat storage medium input end of the first low-temperature heat storage unit 4 is connected with the low-temperature heat storage medium output end of the first low-temperature heat storage unit 4 in the main heat collection system through the seventh pipeline 26. The low-temperature heat storage medium in the first low-temperature heat storage unit 4 in the main heat collection system can enter the seventh pipeline 26 in each of the sub heat collection systems under the drive of the first low-temperature heat storage medium conveying pump module 5 in the main heat collection system; in each of the sub heat collection systems, in the case that the low-temperature heat storage medium flow rates in the seventh pipeline 26 and the tenth pipeline 22 are the same, the maximum flow allowed by the tenth pipeline 22 is greater than the maximum flow allowed by the seventh pipeline 26.

[0066] In the present embodiment, as shown in FIG. 2, the eleventh valve 107 is arranged on each of the eleventh pipelines 31, and the twelfth valve 110 is arranged on each of the twelfth pipelines 32, the eleventh valve 107 is arranged to control the shutoff, communication and flow adjustment of the corresponding eleventh pipeline 31, and the twelfth valve 110 is arranged to control the shutoff, communication and flow adjustment of the corresponding twelfth pipeline 32.

[0067] It needs to be particularly pointed out that, no matter whether the low-temperature heat storage medium output by the heat utilization system is directly conveyed to the corresponding first low-temperature heat storage unit 4 through the seventh pipeline 26 or is first conveyed to the first low-temperature heat storage unit 4 in the main heat collection system and then pumped out to the seventh pipeline 26 in each of the sub heat collection systems through the first low-temperature heat storage medium conveying pump module 5 and then conveyed to the corresponding first low-temperature heat storage unit 4, the ultimate purpose is to convey the low-temperature heat storage medium output by the heat utilization system to each of the first low-temperature heat storage units 4, therefore, in each of the heat collection modules, the above manners and combinations thereof belong to the implementation manners of the first low-temperature heat storage unit 4 receiving the low-temperature heat storage medium output by the low-temperature heat storage medium output end of the heat utilization system through the corresponding seventh pipeline 26. In addition, since the low-temperature heat storage medium output by the low-temperature heat storage medium output end of the heat utilization system will all enter the first low-temperature heat storage unit 4 in the main heat collection system under some operating conditions, the seventh pipeline 26 in the main heat collection system needs to have the capability of completely receiving the low-temperature heat storage medium output by the heat utilization system when the heat utilization system is operated at the maximum load.

[0068] In addition, the first low-temperature heat storage medium conveying pump module 5 in the auxiliary heat collection system can be a single first low-temperature heat storage medium conveying pump, or a pump group containing two or more first low-temperature heat storage medium conveying pumps; when the first low-temperature heat storage medium conveying pump module 5 in the auxiliary heat collection system contains two or more first low-temperature heat storage medium conveying pumps, the first low-temperature heat storage medium conveying pumps can be standby for each other, or can work simultaneously to realize the functions required by the first low-temperature heat storage medium conveying pump module 5. The first low-temperature heat storage medium conveying pump module 5 in the main heat collection system can be a single first low-temperature heat storage medium conveying pump, or a pump group containing two or more first low-temperature heat storage medium conveying pumps; when the first low-temperature heat storage medium conveying pump module 5 in the main heat collection system contains two or more first low-temperature heat storage medium conveying pumps, among which, there can be a first low-temperature heat storage medium conveying pump as a standby, there can be a first low-temperature heat storage medium conveying pump supplying low-temperature heat storage medium to the heat absorption module 3 in the main heat collection system or a first low-temperature heat storage unit 4 in one of the auxiliary heat collection systems, there can be multiple first low-temperature heat storage medium conveying pumps simultaneously supplying low-temperature heat storage medium to the heat absorption module 3 in the main heat collection system or a first low-temperature heat storage unit 4 in one of the auxiliary heat collection systems, or there can be a first low-temperature heat storage medium conveying pump simultaneously supplying low-temperature heat storage medium to the heat absorption module 3 in the main heat collection system and multiple first low-temperature heat storage units 4 in the auxiliary heat collection systems, which is not limited here (for example, in an embodiment, the first low-temperature heat storage medium conveying pump module 5 in the main heat collection system contains three first low-temperature heat storage medium conveying pumps, and the entire tower type solar heat utilization system includes one main heat collection system and two auxiliary heat collection systems, then the three first low-temperature heat storage medium conveying pumps are respectively arranged in one-to-one correspondence with the heat absorption module 3 in the main heat collection system and the first low-temperature heat storage units 4 in the two auxiliary heat collection systems).

[0069] In actual tower type solar heat utilization system, the heat using system and the heat absorbing module 3 in each heat collecting module are not always operated synchronously. For example, during the night or rainy days, the heat absorbing module 3 in each heat collecting module is stopped, while the heat using system is in operation, or the heat using system is stopped due to grid peak shaving or actual operation requirement, while the heat absorbing module 3 in each heat collecting module is in operation. The present embodiment takes full advantage of the feature that the heat using system and the heat absorbing module 3 in each heat collecting module are not always operated synchronously. On the basis of arranging the first low temperature heat storage unit 4 in the main heat collecting system and each auxiliary heat collecting system, the low temperature heat storage medium input end of the seventh pipeline 26 in each auxiliary heat collecting system is connected with the low temperature heat storage medium output end of the first low temperature heat storage unit 4 in the main heat collecting system. By time-sharing the low temperature heat storage medium in the first low temperature heat storage unit 4 in the heat using system or the main heat collecting system to the first low temperature heat storage unit 4 in each auxiliary heat collecting system, the requirement for the maximum flow allowed by the seventh pipeline 26 in each auxiliary heat collecting system can be reduced without affecting the normal operation of the heat using system and the heat absorbing module 3, and thus the cost of the seventh pipeline 26 in each auxiliary heat collecting system can be reduced. The reason why the requirement for the maximum flow allowed by the seventh pipeline 26 in each auxiliary heat collecting system can be reduced without affecting the normal operation of the heat using system and the heat absorbing module 3 is that: (A) the first low temperature heat storage unit 4 in the main heat collecting system can receive all or part of the low temperature heat storage medium output by the heat using system through the seventh pipeline 26 in the main heat collecting system, reduce the maximum flow allowed by the seventh pipeline 26 in each auxiliary heat collecting system, and will not cause the low temperature heat storage medium output by the heat using system to be unable to be output in time and affect the normal operation; (B) the first low temperature heat storage unit 4 in each auxiliary heat collecting system can provide all or part of the low temperature heat storage medium to the corresponding heat absorbing module 3 according to the actual operation requirement of the corresponding heat absorbing module 3, so the maximum flow allowed by the seventh pipeline 26 in each auxiliary heat collecting system can be reduced, and the normal operation of the heat absorbing module 3 in each auxiliary heat collecting system will not be affected due to insufficient low temperature heat storage medium provided by the heat using system to the heat absorbing module 3 in each auxiliary heat collecting system; (C) when the heat using system is stopped or operated at low load, the low temperature heat storage medium output by the heat using system and the low temperature heat storage medium stored in the first low temperature heat storage unit 4 in the main heat collecting system are transported to the first low temperature heat storage unit 4 in each auxiliary heat collecting system through the corresponding seventh pipeline 26, thereby supplementing the low temperature heat storage medium for the first low temperature heat storage unit 4 in each auxiliary heat collecting system, and at the same time, the first low temperature heat storage unit 4 in the main heat collecting system releases space for receiving excess low temperature heat storage medium output by the heat using system, thereby enabling the functions in (A) and (B) to be normally performed.

[0070] In the present embodiment, in each auxiliary heat collecting system, the nominal diameter of the tenth pipeline 22 is greater than the nominal diameter of the seventh pipeline 26.

[0071] As shown in FIG. 2, in the present embodiment, the heat storage capacity of the first low-temperature heat storage unit 4 in the main heat collection system is greater than or equal to the heat storage capacity of the first low-temperature heat storage unit 4 in any one of the auxiliary heat collection systems.

[0072] As shown in FIG. 2, in the present embodiment, in the case where the low-temperature heat medium flow rates of the seventh pipelines 26 in the main heat collection system and the seventh pipelines 26 in each of the auxiliary heat collection systems are the same, the maximum flow rate that can be allowed by the seventh pipeline 26 in the main heat collection system is greater than the maximum flow rate that can be allowed by the seventh pipeline 26 in any one of the auxiliary heat collection systems. Since the low-temperature heat medium output from the low-temperature heat medium output end of the self-use heat system will all enter the first low-temperature heat storage unit 4 in the main heat collection system under some operating conditions, the seventh pipeline 26 in the main heat collection system needs to have the capability of completely receiving the low-temperature heat medium output by the heat using system when the heat using system is operated at maximum load. Therefore, the unit length cost of the seventh pipeline 26 in the main heat collection system is relatively high, and in the foregoing of the present embodiment, it has been indicated that the first low-temperature heat storage unit 6 in the main heat collection system is arranged near the heat using system, so that the length of the seventh pipeline 26 in the main heat collection system with a relatively high unit length cost can be shortened, thereby further reducing the cost.

[0073] As shown in FIG. 2, in the present embodiment, in each heat collection module, the high-temperature heat medium output end of the heat absorption module 3 is further connected to the low-temperature heat medium input end of the first low-temperature heat storage unit 4 through a ninth pipeline 23. In the present embodiment, a ninth valve 101 is arranged on each ninth pipeline 23, and the ninth valve 101 is arranged to control the shutoff, communication and flow rate adjustment of the corresponding ninth pipeline 23. In the main heat collection system and each auxiliary heat collection system, when the heat absorption module 3 is in the starting stage or the solar energy reflected by the heliostat field module 201 to the heat absorption module 3 is insufficient, the temperature of the heat storage medium output by the high-temperature heat medium output end of the heat absorption module 3 cannot meet the preset requirement. By arranging the ninth pipeline 23 in the main heat collection system and each auxiliary heat collection system, the heat storage medium output by the high-temperature heat medium output end of the heat absorption module 3 that does not meet the temperature requirement can be re-entered into the corresponding first low-temperature heat storage unit 4, and then be transported to the corresponding heat absorption module 3 by the corresponding first low-temperature heat medium transport pump module 5 to be reheated to obtain high-temperature heat storage medium meeting the temperature requirement.

[0074] Embodiment 3

[0075] As shown in Fig. 3 or Fig. 4, the present embodiment provides a tower type solar thermal utilization system based on the embodiment 1 or the embodiment 2. The present embodiment is based on the embodiment 1 or the embodiment 2, and in each heat collecting module, the first heat storage module further comprises a first high temperature heat storage unit 6 configured to store high temperature heat storage medium and a first high temperature heat storage medium delivery pump module 7 configured to pump out the high temperature heat storage medium in the first high temperature heat storage unit 6, in the present embodiment, the first high temperature heat storage medium delivery pump module 7 is arranged on the corresponding first high temperature heat storage unit 6; in each heat collecting module, a first pipeline 24 and a second pipeline 25 are further included; in each heat collecting module, the high temperature heat storage medium output from the heat absorption module 3 is delivered to the first high temperature heat storage unit 6 through the first pipeline 24, and the high temperature heat storage medium in the first high temperature heat storage unit 6 is delivered to the heat utilization system through the second pipeline 25 under the drive of the first high temperature heat storage medium delivery pump module 7, wherein it should be noted that the heat absorption module 3, the first pipeline 24, the first high temperature heat storage unit 6, the first high temperature heat storage medium delivery pump module 7 and the second pipeline 25 mentioned in the description belong to the same heat collecting module. In each sub heat collecting system, in the case that the flow rates of the high temperature heat storage medium in the first pipeline 24 and the second pipeline 25 are the same, the maximum flow allowed by the first pipeline 24 is greater than the maximum flow allowed by the second pipeline 25. In the present embodiment, as shown in Fig. 3 or Fig. 4, a first valve 102 is arranged on the first pipeline 24 and a second valve 104 is arranged on the second pipeline 25 in each heat collecting module.

[0076] In the present embodiment, each first high temperature heat storage unit 6 is a separate storage tank, of course, in other embodiments, each first high temperature heat storage unit 6 can also be a local space in a storage tank, for example, a storage tank simultaneously includes a high temperature heat storage medium storage space and a low temperature heat storage medium storage space separated from each other, wherein the storage space of the high temperature heat storage medium is the first high temperature heat storage unit 6 mentioned herein. In addition, in the present embodiment, the heat storage medium is molten salt, the low temperature heat storage medium is low temperature molten salt, and the high temperature heat storage medium is high temperature molten salt, of course, in other embodiments, the heat storage medium can also be liquid metal and other media that can match the application environment of the tower type solar thermal utilization system. In addition, the first high temperature heat storage medium delivery pump module 7 can be a separate first high temperature heat storage medium delivery pump, or a pump group comprising two or more first high temperature heat storage medium delivery pumps, when the first high temperature heat storage medium delivery pump module 7 comprises two or more first high temperature heat storage medium delivery pumps, each first high temperature heat storage medium delivery pump can be standby for each other, or can work simultaneously, thereby realizing the functions required by the first high temperature heat storage medium delivery pump module 7.

[0077] In the tower type solar heat utilization system without the first high temperature heat storage units 6 and the first high temperature heat storage medium conveying pump modules 7, the high temperature heat storage medium output from each heat absorption module 3 needs to be conveyed to the heat utilization system immediately, if the heat absorption power of the heat absorption module 3 is increased, the conveying capacity of the high temperature heat storage medium conveying pipeline between the heat absorption module 3 and the heat utilization system and the heat utilization power of the heat utilization system must be increased synchronously, otherwise the whole tower type solar heat utilization system will not be able to operate normally. In the present application, the first high temperature heat storage unit 6 and the first high temperature heat storage medium conveying pump module 7 are arranged in each heat absorption module 3, when the heat absorption power of the heat absorption module 3 is increased, the high temperature heat storage medium output from the heat absorption module 3 and unable to be conveyed to the heat utilization system immediately can be stored in the corresponding first high temperature heat storage unit 6, in the case of shutdown of the heat absorption module 3 at night or on rainy days, the high temperature heat storage medium in the corresponding first high temperature heat storage unit 6 is conveyed to the heat utilization system by the first high temperature heat storage medium conveying pump module 7, therefore, the conveying capacity of the high temperature heat storage medium conveying pipeline (i.e. the second pipeline 25) for conveying the high temperature heat storage medium to the heat utilization system does not need to be increased, the heat utilization power of the heat utilization system does not need to be increased, the utilization of solar energy can be increased, and the cost can be reduced.

[0078] As shown in FIG. 3 or FIG. 4, in the present embodiment, the distance between the high temperature heat storage medium output end of the first high temperature heat storage unit 6 in the main heat absorption system and the high temperature heat storage medium input end of the heat utilization system is less than the distance between the high temperature heat storage medium output end of the first high temperature heat storage unit 6 in any auxiliary heat absorption system and the high temperature heat storage medium input end of the heat utilization system. By using this scheme, the heat utilization system can be arranged near the first high temperature heat storage unit 6 and the first high temperature heat storage medium conveying pump module 7 in the main heat absorption system, the length of the conveying pipeline (i.e. the second pipeline 25 in the main heat absorption system) between the high temperature heat storage medium output end of the first high temperature heat storage medium conveying pump module 7 in the main heat absorption system and the high temperature heat storage medium input end of the heat utilization system can be effectively reduced, and the cost can be effectively reduced by reducing the length of the conveying pipeline.

[0079] In each auxiliary heat absorption system, the nominal diameter of the first pipeline 24 is greater than the nominal diameter of the second pipeline 25.

[0080] As shown in FIG. 3 or FIG. 4, in the embodiment, a third pipeline 27 is further included in each sub heat collection system; in each sub heat collection system, the high-temperature heat storage medium output end of the heat absorption module 3 is further connected with the second pipeline 25 through the third pipeline 27. As shown in FIG. 3 or FIG. 4, in the embodiment, in each sub heat collection system, the third pipeline 27 is provided with a third valve 103, the connection point of the third pipeline 27 and the second pipeline 25 is a first connection point, the third valve 103 is arranged between the first connection point and the high-temperature heat storage medium input end of the third pipeline 27, and the second valve 104 is arranged between the first connection point and the high-temperature heat storage medium output end of the first high-temperature heat storage medium conveying pump module 7. By arranging the third pipeline 27 in each sub heat collection system, in each sub heat collection system, part of the high-temperature heat storage medium output from the heat absorption module 3 can be conveyed to the heat utilization system without passing through the first high-temperature heat storage unit 6 in the sub heat collection system in which the heat absorption module 3 is located. Since the heat absorption module 3 is arranged on the high-rise heat absorption tower 2, the high-temperature heat storage medium in the heat absorption module 3 can convert the gravitational potential energy possessed by the high-temperature heat storage medium into kinetic energy in the process of being conveyed to the heat utilization system through the third pipeline 27 and the second pipeline 25 in turn, thereby achieving full utilization of energy and further reducing the energy consumed for driving the flow of high-temperature heat storage medium in the entire tower type solar heat utilization system.

[0081] As shown in FIG. 3 or FIG. 4, in the embodiment, a fifth pipeline 21 is further included in each sub heat collection system; in each sub heat collection system, the high-temperature heat storage medium input end of the fifth pipeline 21 is connected with the high-temperature heat storage medium output end of the heat absorption module 3, and the high-temperature heat storage medium output end of the fifth pipeline 21 is connected with the high-temperature heat storage medium input end of the first pipeline 24 and the high-temperature heat storage medium input end of the third pipeline 27, respectively. By arranging the fifth pipeline 21 in each sub heat collection system, the first pipeline 24 and the third pipeline 27 in each sub heat collection system are essentially shared in part, thereby reducing the cost, and at the same time, since the heat absorption module 3 is arranged on the high-rise heat absorption tower 2, high-altitude operation is required for laying the pipeline on the heat absorption tower 2, and the space of the heat absorption tower 2 is limited, so the laying of the pipeline is difficult. By arranging the fifth pipeline 21, the laying difficulty of the pipeline can also be reduced.

[0082] As shown in FIG. 3 or FIG. 4, in the present embodiment, the distance between the high-temperature heat storage medium output end of the heat-absorbing module 3 in the main heat collection system and the high-temperature heat storage medium input end of the first high-temperature heat storage unit 6 in the main heat collection system is less than the distance between the high-temperature heat storage medium output end of the heat-absorbing module 3 in any one of the auxiliary heat collection systems and the high-temperature heat storage medium input end of the first high-temperature heat storage unit 6 in the main heat collection system; the distance between the high-temperature heat storage medium output end of the heat-absorbing module 3 in the main heat collection system and the high-temperature heat storage medium input end of the heat utilization system is less than the distance between the high-temperature heat storage medium output end of the heat-absorbing module 3 in any one of the auxiliary heat collection systems and the high-temperature heat storage medium input end of the heat utilization system; taking any one of the auxiliary heat collection systems as the first characteristic auxiliary heat collection system, the distance between the high-temperature heat storage medium output end of the heat-absorbing module 3 in the first characteristic auxiliary heat collection system and the high-temperature heat storage medium input end of the first high-temperature heat storage unit 6 in the first characteristic auxiliary heat collection system is less than the distance between the high-temperature heat storage medium output end of the first high-temperature heat storage unit 6 in the first characteristic auxiliary heat collection system and the high-temperature heat storage medium input end of the first high-temperature heat storage unit 6 in the main heat collection system. This scheme is used to arrange the heat utilization system and the first high-temperature heat storage unit 6 in the main heat collection system near the heat-absorbing module 3 in the main heat collection system, and to arrange the first high-temperature heat storage unit 6 in each auxiliary heat collection system near the heat-absorbing module 3 in the auxiliary heat collection system while away from the first high-temperature heat storage unit 6 in the main heat collection system. When the heat utilization system is arranged near the heat-absorbing module 3 in the main heat collection system, the length of the connecting pipeline (i.e., the sum of the lengths of the first pipeline 24 and the second pipeline 25 in the main heat collection system) between the high-temperature heat storage medium output end of the heat-absorbing module 3 in the main heat collection system and the heat utilization system can be shortened, and thus the cost can be reduced; when the first high-temperature heat storage unit 6 in the main heat collection system is arranged near the heat-absorbing module 3 in the main heat collection system, the length of the connecting pipeline (i.e., the first pipeline 24 in the main heat collection system) between the high-temperature heat storage medium output end of the heat-absorbing module 3 in the main heat collection system and the high-temperature heat storage medium input end of the first high-temperature heat storage unit 6 in the main heat collection system can be shortened, and thus the cost can be reduced; when the first high-temperature heat storage unit 6 in each auxiliary heat collection system is arranged near the heat-absorbing module 3 in the auxiliary heat collection system while away from the first high-temperature heat storage unit 6 in the main heat collection system, the length of the connecting pipeline (i.e., the first pipeline 24) between the high-temperature heat storage medium output end of the heat-absorbing module 3 and the high-temperature heat storage medium input end of the corresponding first high-temperature heat storage unit 6 in the auxiliary heat collection system is essentially reduced by increasing the length of the second pipeline 25 with lower unit length cost in each auxiliary heat collection system, so that the overall cost of the tower type solar heat utilization system is reduced.

[0083] As shown in FIG. 3 or FIG. 4, in the present embodiment, the high-temperature heat storage medium output end of the second pipeline 25 in each auxiliary heat collection system is connected with the high-temperature heat storage medium input end of the first high-temperature heat storage unit 6 in the main heat collection system; or, in each auxiliary heat collection system, the high-temperature heat storage medium output end of the second pipeline 25 is connected with the high-temperature heat storage medium input end of the heat utilization system through the sixth pipeline 29, and the high-temperature heat storage medium output end of the second pipeline 25 is also connected with the high-temperature heat storage medium input end of the first high-temperature heat storage unit 6 in the main heat collection system through the fourth pipeline 28. In the present embodiment, the fourth pipeline 28 is provided with a fourth valve 105, and the sixth pipeline 29 is provided with a sixth valve 106. It needs to be particularly pointed out that, in each auxiliary heat collection system, the high-temperature heat storage medium transported through the second pipeline 25 is transported to the high-temperature heat storage medium input end of the heat utilization system through the sixth pipeline 29, or is first transported into the first high-temperature heat storage unit 6 in the main heat collection system, and then is transported to the high-temperature heat storage medium input end of the heat utilization system through the first high-temperature heat storage medium transport pump module 7 in the main heat collection system, and the ultimate goal of the high-temperature heat storage medium is to be transported to the heat utilization system, so the above manners and combinations thereof all belong to the implementation manners of transporting the high-temperature heat storage medium in the heat absorption module 3 to the high-temperature heat storage medium input end of the heat utilization system.

[0084] In actual tower type solar heat utilization system, the heat using system and the heat absorbing module 3 in each heat collecting module are not always operated synchronously. For example, during the night or rainy days, the heat absorbing module 3 in each heat collecting module is stopped, while the heat using system is in operation, or the heat using system is stopped due to grid peak shaving or actual operation requirement, while the heat absorbing module 3 in each heat collecting module is in operation. The embodiment takes full advantage of the characteristic that the heat using system and the heat absorbing module 3 in each heat collecting module are not always operated synchronously. On the basis of arranging the first high temperature heat storage unit 6 in the main heat collecting system and each auxiliary heat collecting system, the high temperature heat storage medium output end of the second pipeline 25 in each auxiliary heat collecting system is connected with the high temperature heat storage medium input end of the first high temperature heat storage unit 6 in the main heat collecting system. By time-sharing the high temperature heat storage medium in each auxiliary heat collecting system to the first high temperature heat storage unit 6 in the main heat collecting system and the heat using system, the requirement of the maximum flow allowed by the second pipeline 25 in each auxiliary heat collecting system can be reduced without affecting the normal operation of the heat using system and the heat absorbing module 3, and then the cost of the second pipeline 25 in each auxiliary heat collecting system can be reduced. The reason why the requirement of the maximum flow allowed by the second pipeline 25 in each auxiliary heat collecting system can be reduced without affecting the normal operation of the heat using system and the heat absorbing module 3 is that: (1) the first high temperature heat storage unit 6 in each auxiliary heat collecting system can receive all or part of the high temperature heat storage medium output by the corresponding heat absorbing module 3, so that reducing the maximum flow allowed by the second pipeline 25 in each auxiliary heat collecting system will not cause the high temperature heat storage medium generated in the heat absorbing module 3 in each auxiliary heat collecting system to be unable to be output in time and affect the normal operation; (2) the first high temperature heat storage unit 6 in the main heat collecting system can provide all or part of the high temperature heat storage medium required by the heat using system according to the actual operation requirement of the heat using system, so that reducing the maximum flow allowed by the second pipeline 25 in each auxiliary heat collecting system will not affect the normal operation of the heat using system due to insufficient high temperature heat storage medium transported to the heat using system; (3) when the heat absorbing module 3 in each auxiliary heat collecting system is stopped or operates at low load, the high temperature heat storage medium output by the heat absorbing module 3 in each auxiliary heat collecting system and the high temperature heat storage medium stored in the first high temperature heat storage unit 6 are transported to the first high temperature heat storage unit 6 in the main heat collecting system and the heat using system through the corresponding second pipeline 25, thereby supplementing the standby high temperature heat storage medium for the first high temperature heat storage unit 6 in the main heat collecting system, and freeing up space for the first high temperature heat storage unit 6 in each auxiliary heat collecting system, thereby facilitating the reception of excess high temperature heat storage medium output by the corresponding heat absorbing module 3 at high load, and then being able to normally play the functions in (1) and (2) above.

[0085] Meanwhile, the high-temperature heat storage medium in the first high-temperature heat storage unit 6 in the main heat collection system can be quickly transported to the heat consumption system through the first high-temperature heat storage medium delivery pump module 7 in the main heat collection system when the heat consumption system needs heat, so that the heat consumption system can quickly respond to the need of operation and shorten the response time. In addition, by using the above scheme, the influence of the operation of the heat absorption module 3 in the main heat collection system and each auxiliary heat collection system on the heat consumption system (for example, the heat consumption system needs high-load operation, but the heat absorption module 3 cannot directly provide enough high-temperature heat storage medium for the heat consumption system due to the influence of weather and other reasons) can be effectively reduced, so that the operation of the heat consumption system is more flexible.

[0086] In the embodiment, when the flow rate of the high-temperature heat storage medium in the connection pipeline between the high-temperature heat storage medium output end of the first high-temperature heat storage unit 6 in the main heat collection system and the high-temperature heat storage medium input end of the heat consumption system and the high-temperature heat storage medium in the second pipeline 25 in each auxiliary heat collection system are the same, the maximum flow rate allowed by the connection pipeline between the high-temperature heat storage medium output end of the first high-temperature heat storage unit 6 in the main heat collection system and the high-temperature heat storage medium input end of the heat consumption system is greater than the maximum flow rate allowed by the second pipeline 25 in any auxiliary heat collection system. By using this scheme, since the maximum flow rate allowed by the connection pipeline (i.e., the second pipeline 25 in the main heat collection system) between the high-temperature heat storage medium output end of the first high-temperature heat storage unit 6 in the main heat collection system and the high-temperature heat storage medium input end of the heat consumption system is greater than the maximum flow rate allowed by the second pipeline 25 in any auxiliary heat collection system, the unit length cost of the second pipeline 25 in the main heat collection system is relatively high, and in the foregoing of the embodiment, it is indicated that the first high-temperature heat storage unit 6 in the main heat collection system is arranged near the heat consumption system, so that the length of the second pipeline 25 in the main heat collection system with relatively high unit length cost can be shortened, and the cost can be reduced.

[0087] As shown in FIG. 3 or FIG. 4, in the embodiment, the heat storage capacity of the first heat storage unit in the main heat collection system is greater than or equal to the heat storage capacity of the first high-temperature heat storage unit 6 in any auxiliary heat collection system.

[0088] As shown in FIG. 3 or FIG. 4, in the embodiment, the main heat collection system further comprises a twenty-third pipeline 8; in the main heat collection system, the high-temperature heat storage medium output end of the heat absorption module 3 is connected to the high-temperature heat storage medium input end of the heat utilization system through the twenty-third pipeline 8. In the embodiment, the twenty-third pipeline 8 is provided with a twenty-third valve 9. By arranging the twenty-third pipeline 8 in the main heat collection system, part of the high-temperature heat storage medium output from the heat absorption module 3 in the main heat collection system can be transported to the heat utilization system without passing through the first high-temperature heat storage unit 6 in the main heat collection system. Since the heat absorption module 3 is arranged on the high-rise heat absorption tower 2, the high-temperature heat storage medium in the heat absorption module 3 can convert the gravitational potential energy possessed by the high-temperature heat storage medium into kinetic energy in the process of being transported to the heat utilization system through the twenty-third pipeline 8 and the second pipeline 25 in the main heat collection system in turn, thereby achieving full utilization of energy and reducing the energy consumed for driving the flow of the high-temperature heat storage medium in the entire tower type solar heat utilization system.

[0089] As shown in FIG. 3 or FIG. 4, in the embodiment, the main heat collection system further comprises a twenty-fifth pipeline 12; in the main heat collection system, the high-temperature heat storage medium input end of the twenty-fifth pipeline 12 is connected to the high-temperature heat storage medium output end of the heat absorption module 3, and the high-temperature heat storage medium output end of the twenty-fifth pipeline 12 is connected to the high-temperature heat storage medium input end of the first pipeline 24 and the high-temperature heat storage medium input end of the twenty-third pipeline 8, respectively. By arranging the twenty-fifth pipeline 12 in the main heat collection system, the first pipeline 24, the twenty-third pipeline 8 and part of the pipeline section of the ninth pipeline 23 in the main heat collection system are essentially shared, thereby reducing the cost. At the same time, since the heat absorption module 3 is arranged on the high-rise heat absorption tower 2, high-altitude operation is required for laying the pipeline on the heat absorption tower 2, and the space of the heat absorption tower 2 is limited, so the laying of the pipeline is difficult. By arranging the twenty-fifth pipeline 12, the laying difficulty of the pipeline can also be reduced.

[0090] The above describes the embodiments of the present application. It should be understood that the present application is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily without conflict.

Claims

1. A tower type solar heat utilization system, comprising a heat utilization system, a main heat collection system and at least one auxiliary heat collection system; In the main heat collection system and each of the auxiliary heat collection systems, a heat collection module is included; In each of the heat collection modules, a heliostat field module (201) and a heat absorption module (3) arranged on a heat absorption tower (2) are included, the heliostat field module (201) is arranged to track the sun and reflect sunlight to the heat absorption module (3), the heat absorption module (3) is arranged to heat a low-temperature heat storage medium in the heat absorption module (3) with the sunlight reflected by the heliostat field module (201) to convert the low-temperature heat storage medium in the heat absorption module (3) into a high-temperature heat storage medium, and the high-temperature heat storage medium in the heat absorption module (3) is output to a high-temperature heat storage medium input end of the heat utilization system; In each of the heat collection modules, a first heat storage module is further included, the first heat storage module includes a first low-temperature heat storage unit (4) arranged to store a low-temperature heat storage medium and a first low-temperature heat storage medium conveying pump module (5) arranged to convey the low-temperature heat storage medium in the first low-temperature heat storage unit (4) to a low-temperature heat storage medium input end of the heat absorption module (3); In each of the heat collection modules, a tenth pipeline (22) is further included; In each of the heat collection modules, the low-temperature heat storage medium in the first low-temperature heat storage unit (4) is conveyed to the low-temperature heat storage medium input end of the heat absorption module (3) through the tenth pipeline (22) under the drive of the first low-temperature heat storage medium conveying pump module (5); In each of the heat collection modules, a seventh pipeline (26) is further included; In each of the heat collection modules, the first low-temperature heat storage unit (4) receives the low-temperature heat storage medium output from a low-temperature heat storage medium output end of the heat utilization system through the seventh pipeline (26); The distance between the low-temperature heat storage medium input end of the first low-temperature heat storage unit (4) in the main heat collection system and the low-temperature heat storage medium output end of the heat utilization system is less than the distance between the low-temperature heat storage medium input end of the first low-temperature heat storage unit (4) in any of the auxiliary heat collection systems and the low-temperature heat storage medium output end of the heat utilization system.

2. A tower-based solar thermal energy system according to claim 1, wherein, The distance between the low-temperature heat storage medium input end of the heat absorption module (3) in the main heat collection system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit (4) in the main heat collection system is less than the distance between the low-temperature heat storage medium input end of the heat absorption module (3) in any of the auxiliary heat collection systems and the low-temperature heat storage medium output end of the first low-temperature heat storage unit (4) in the main heat collection system; The distance between the low-temperature heat storage medium input end of the heat absorption module (3) in the main heat collection system and the low-temperature heat storage medium output end of the heat utilization system is less than the distance between the low-temperature heat storage medium input end of the heat absorption module (3) in any of the auxiliary heat collection systems and the low-temperature heat storage medium output end of the heat utilization system; In each of the sub heat collection systems, the low-temperature heat storage medium input end of the first low-temperature heat storage unit (4) is connected with the low-temperature heat storage medium output end of the heat utilization system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit (4) in the main heat collection system through the seventh pipeline (26); or, in each of the sub heat collection systems, the low-temperature heat storage medium input end of the first low-temperature heat storage unit (4) is connected with the low-temperature heat storage medium output end of the first low-temperature heat storage unit (4) in the main heat collection system through the seventh pipeline (26).

3. A tower-based solar thermal energy system according to claim 1, wherein, In each of the sub heat collection systems, the low-temperature heat storage medium input end of the first low-temperature heat storage unit (4) is connected with the low-temperature heat storage medium output end of the heat utilization system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit (4) in the main heat collection system through the seventh pipeline (26); or, in each of the sub heat collection systems, the low-temperature heat storage medium input end of the first low-temperature heat storage unit (4) is connected with the low-temperature heat storage medium output end of the first low-temperature heat storage unit (4) in the main heat collection system through the seventh pipeline (26). The low-temperature heat storage medium in the first low-temperature heat storage unit (4) in the main heat collection system can enter the seventh pipeline (26) in each of the sub heat collection systems under the drive of the first low-temperature heat storage medium conveying pump module (5) in the main heat collection system. In each of the sub heat collection systems, in the case that the low-temperature heat storage medium flow rates in the seventh pipeline (26) and the tenth pipeline (22) are the same, the maximum flow rate allowed by the tenth pipeline (22) is greater than the maximum flow rate allowed by the seventh pipeline (26).

4. A tower-based solar thermal energy system according to claim 1, wherein, The first heat storage module in the main heat collection system further comprises a second low-temperature heat storage medium conveying pump module (13), which is configured to convey the low-temperature heat storage medium in the first low-temperature heat storage unit (4) in the main heat collection system to the first low-temperature heat storage unit (4) in each of the sub heat collection systems. In each of the sub heat collection systems, the low-temperature heat storage medium input end of the first low-temperature heat storage unit (4) is connected with the low-temperature heat storage medium output end of the heat utilization system and the low-temperature heat storage medium output end of the first low-temperature heat storage unit (4) in the main heat collection system through the seventh pipeline (26); or, in each of the sub heat collection systems, the low-temperature heat storage medium input end of the first low-temperature heat storage unit (4) is connected with the low-temperature heat storage medium output end of the first low-temperature heat storage unit (4) in the main heat collection system through the seventh pipeline (26). The low-temperature heat storage medium in the first low-temperature heat storage unit (4) in the main heat collection system can enter the seventh pipeline (26) in each of the sub heat collection systems under the drive of the second low-temperature heat storage medium conveying pump module (13). In each of the auxiliary heat collection systems, the maximum flow allowed by the tenth pipeline (22) is greater than the maximum flow allowed by the seventh pipeline (26) when the flow rates of the low-temperature thermal storage medium in the seventh pipeline (26) and the tenth pipeline (22) are the same.

5. A tower-based solar thermal energy system according to claim 3, wherein, In each of the auxiliary heat collection systems, the nominal diameter of the tenth pipeline (22) is greater than the nominal diameter of the seventh pipeline (26).

6. A tower-based solar thermal energy system according to claim 4, wherein, In each of the auxiliary heat collection systems, the nominal diameter of the tenth pipeline (22) is greater than the nominal diameter of the seventh pipeline (26).

7. A tower-based solar thermal energy system according to claim 1, wherein, The heat storage capacity of the first low-temperature thermal storage unit (4) in the main heat collection system is greater than or equal to the heat storage capacity of the first low-temperature thermal storage unit (4) in any of the auxiliary heat collection systems.

8. A tower-based solar thermal energy system according to claim 1, wherein, In each of the auxiliary heat collection systems, the maximum flow allowed by the tenth pipeline (22) is greater than the maximum flow allowed by the seventh pipeline (26) when the flow rates of the low-temperature thermal storage medium in the seventh pipeline (26) and the tenth pipeline (22) are the same.

9. A tower-based solar thermal energy system according to claim 1, wherein, In each of the heat collection modules, the high-temperature thermal storage medium output end of the heat absorption module (3) is also connected to the low-temperature thermal storage medium input end of the first low-temperature thermal storage unit (4) through a ninth pipeline (23).

10. A tower-based solar thermal energy system according to any of claims 1-9, wherein, In each of the heat collection modules, the first heat storage module further includes a first high-temperature thermal storage unit (6) configured to store high-temperature thermal storage medium and a first high-temperature thermal storage medium delivery pump module (7) configured to pump out the high-temperature thermal storage medium in the first high-temperature thermal storage unit (6); In each of the heat collection modules, a first pipeline (24) and a second pipeline (25) are further included. In each of the heat collection modules, the high-temperature thermal storage medium output from the heat absorption module (3) is delivered to the first high-temperature thermal storage unit (6) through the first pipeline (24), and the high-temperature thermal storage medium in the first high-temperature thermal storage unit (6) is delivered to the heat utilization system through the second pipeline (25) under the drive of the first high-temperature thermal storage medium delivery pump module (7). In each of the auxiliary heat collection systems, the maximum flow allowed by the tenth pipeline (22) is greater than the maximum flow allowed by the seventh pipeline (26) when the flow rates of the low-temperature thermal storage medium in the seventh pipeline (26) and the tenth pipeline (22) are the same.

11. A tower-based solar thermal energy system according to claim 10, wherein, The distance between the high-temperature thermal storage medium output end of the first high-temperature thermal storage unit (6) in the main heat collection system and the high-temperature thermal storage medium input end of the heat utilization system is less than the distance between the high-temperature thermal storage medium output end of the first high-temperature thermal storage unit (6) in any of the auxiliary heat collection systems and the high-temperature thermal storage medium input end of the heat utilization system.

12. A tower-based solar thermal energy system according to claim 10, wherein, In each of the auxiliary heat collection systems, a third pipeline (27) is further included. In each of the auxiliary heat collection systems, the high-temperature thermal storage medium output end of the heat absorption module (3) is also connected to the second pipeline (25) through the third pipeline (27).

13. A tower-based solar thermal energy system according to claim 12, wherein, In each of the auxiliary heat collection systems, a fifth pipeline (21) is further included. In each of the sub heat collection systems, the high-temperature heat storage medium input end of the fifth pipeline (21) is connected with the high-temperature heat storage medium output end of the heat absorption module (3), and the high-temperature heat storage medium output end of the fifth pipeline (21) is respectively connected with the high-temperature heat storage medium input end of the first pipeline (24) and the high-temperature heat storage medium input end of the third pipeline (27).

14. A tower-based solar thermal energy system according to claim 10, wherein, The distance between the high-temperature heat storage medium output end of the heat absorption module (3) in the main heat collection system and the high-temperature heat storage medium input end of the first high-temperature heat storage unit (6) in the main heat collection system is less than the distance between the high-temperature heat storage medium output end of the heat absorption module (3) in any one of the sub heat collection systems and the high-temperature heat storage medium input end of the first high-temperature heat storage unit (6) in the main heat collection system. The distance between the high-temperature heat storage medium output end of the heat absorption module (3) in the main heat collection system and the high-temperature heat storage medium input end of the heat utilization system is less than the distance between the high-temperature heat storage medium output end of the heat absorption module (3) in any one of the sub heat collection systems and the high-temperature heat storage medium input end of the heat utilization system. Taking any one of the sub heat collection systems as a first characteristic sub heat collection system, the distance between the high-temperature heat storage medium output end of the heat absorption module (3) in the first characteristic sub heat collection system and the high-temperature heat storage medium input end of the first high-temperature heat storage unit (6) in the first characteristic sub heat collection system is less than the distance between the high-temperature heat storage medium output end of the first high-temperature heat storage unit (6) in the first characteristic sub heat collection system and the high-temperature heat storage medium input end of the first high-temperature heat storage unit (6) in the main heat collection system.

15. A tower-based solar thermal energy system according to claim 10, wherein, In each of the sub heat collection systems, the high-temperature heat storage medium output end of the second pipeline (25) is connected with the high-temperature heat storage medium input end of the first high-temperature heat storage unit (6) in the main heat collection system; or, in each of the sub heat collection systems, the high-temperature heat storage medium output end of the second pipeline (25) is connected with the high-temperature heat storage medium input end of the heat utilization system through a sixth pipeline (29), and the high-temperature heat storage medium output end of the second pipeline (25) is also connected with the high-temperature heat storage medium input end of the first high-temperature heat storage unit (6) in the main heat collection system through a fourth pipeline (28).

16. A tower-based solar thermal energy system as set forth in claim 10 wherein, In each of the sub heat collection systems, the nominal diameter of the first pipeline (24) is greater than the nominal diameter of the second pipeline (25).

17. A tower-based solar thermal energy system as set forth in claim 15 wherein, In the case that the connection pipeline between the high-temperature heat storage medium output end of the first high-temperature heat storage unit (6) in the main heat collection system and the high-temperature heat storage medium input end of the heat utilization system and the high-temperature heat storage medium flow rate in the second pipeline (25) in each of the sub heat collection systems are the same, the maximum flow allowed by the connection pipeline between the high-temperature heat storage medium output end of the first high-temperature heat storage unit (6) in the main heat collection system and the high-temperature heat storage medium input end of the heat utilization system is greater than the maximum flow allowed by the second pipeline (25) in any one of the sub heat collection systems.

18. A tower-based solar thermal energy system as set forth in claim 15 wherein, The heat storage capacity of the first high-temperature heat storage unit (6) in the main heat collection system is greater than or equal to the heat storage capacity of the first high-temperature heat storage unit (6) in any one of the auxiliary heat collection systems.

19. A tower-based solar thermal energy system as set forth in claim 10 wherein, In the main heat collection system, a twenty-third pipeline (8) is further included. In the main heat collection system, the high-temperature heat storage medium output end of the heat absorption module (3) is connected with the high-temperature heat storage medium input end of the heat utilization system through the twenty-third pipeline (8).

20. A tower-based solar thermal energy system as claimed in claim 19, wherein, In the main heat collection system, a twenty-fifth pipeline (12) is further included. In the main heat collection system, the high-temperature heat storage medium input end of the twenty-fifth pipeline (12) is connected with the high-temperature heat storage medium output end of the heat absorption module (3), and the high-temperature heat storage medium output end of the twenty-fifth pipeline (12) is connected with the high-temperature heat storage medium input end of the first pipeline (24) and the high-temperature heat storage medium input end of the twenty-third pipeline (8), respectively.

21. A tower-based solar thermal energy system as set forth in claim 12 wherein, In each of the auxiliary heat collection systems, a first valve (102) is arranged on the first pipeline (24), a second valve (104) is arranged on the second pipeline (25), and a third valve (103) is arranged on the third pipeline (27). In each of the auxiliary heat collection systems, the connection point of the third pipeline (27) and the second pipeline (25) is a first connection point, the third valve (103) is arranged between the first connection point and the high-temperature heat storage medium input end of the third pipeline (27), and the second valve (104) is arranged between the first connection point and the high-temperature heat storage medium output end of the first high-temperature heat storage medium delivery pump module (7).

22. A tower-based solar thermal energy system as set forth in claim 19 wherein, The twenty-third pipeline (8) is provided with a twenty-third valve (9).

23. A tower-based solar thermal energy system as set forth in claim 15 wherein, In each of the auxiliary heat collection systems, a fourth valve (105) is arranged on the fourth pipeline (28), and a sixth valve (106) is arranged on the sixth pipeline (29).

24. A tower-based solar thermal energy system as set forth in claim 1 wherein, The heat utilization system includes a heat exchange system (10) and a steam turbine generator unit (11), and the heat exchange system (10) is arranged to transfer heat in the high-temperature heat storage medium to a water working medium, thereby generating high-temperature and high-pressure steam to drive the steam turbine generator unit (11) to operate.

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