Coal gas power generation molten salt heat storage peak shaving system, method and device based on steam drum extraction

Abstract

The application provides a coal gas power generation molten salt heat storage peak regulation system, method and device based on a steam drum steam extraction, relates to the peak regulation power generation field, and includes a boiler steam drum, a molten salt steam superheater, a steam turbine, a high-temperature molten salt pump and a molten salt storage tank; wherein the first end of the molten salt steam superheater is connected with the boiler steam drum; the second end of the molten salt steam superheater is connected with the steam turbine; the third end of the molten salt steam superheater is connected with the high-temperature molten salt pump; the fourth end of the molten salt steam superheater is connected with the molten salt storage tank; wherein under a low load condition, the molten salt steam superheater obtains steam from the boiler steam drum to maintain a heat preservation state; under a high load condition, the molten salt steam superheater heats the steam obtained from the boiler steam drum by using the molten salt storage tank, obtains superheated steam, and transmits the superheated steam to the steam turbine. The application can flexibly adjust the amount of steam entering the steam turbine to participate in work by adjusting the yield of superheated steam, so as to realize the peak shaving and valley filling of the power generator set power.

Description

Technical Field

[0001] This application relates to the field of peak-shaving power generation, specifically a coal gas power generation molten salt thermal storage peak-shaving system, method, and apparatus based on steam extraction from the steam drum. Background Technology

[0002] With the accelerating pace of industrialization, the contradiction between energy shortage and high energy consumption is becoming increasingly prominent. Energy storage is a key supporting technology for the energy revolution, as well as a means of regulation to address the large-scale integration of renewable energy, improve the efficiency of power systems and regional energy systems, and enhance security.

[0003] Molten salt thermal energy storage features a wide temperature range, large heat capacity, and high heat exchange efficiency. It can cleanly, efficiently, and flexibly supply stored thermal energy to power generation equipment, and has already seen some application in the concentrated solar power (CSP) field. If peak-shaving and valley-filling methods can be implemented in conjunction with peak-valley industrial electricity consumption characteristics, and the existing "on-demand storage-release" approach to coal gas resources is adjusted, the operation and maintenance capabilities of the power system will be improved. Specifically, it can also reduce the impact of power rationing on steel mill production during special periods, ensuring a continuous power supply for steel mill production.

[0004] Existing coal gas power generation peak-shaving systems heat the low-temperature heat exchange medium through electric heating, converting electricity generated during off-peak hours into heat in the medium, resulting in low energy conversion efficiency. Furthermore, the heat release process typically involves using a heat storage medium to heat the low-temperature feedwater in stages. This process involves preheating, evaporation, and superheating, making the system relatively complex and resulting in significant heat loss.

[0005] This section is intended to provide background or context for the embodiments of the invention set forth in the claims. The description herein is not an admission that it is prior art simply because it is included in this section. Summary of the Invention

[0006] To address the problems in the prior art, this application provides a coal gas power generation molten salt thermal storage peak shaving system, method, and apparatus based on steam drum extraction. It can flexibly adjust the amount of steam entering the turbine to perform work by adjusting the output of superheated steam, thereby achieving peak shaving and valley filling of generator unit power.

[0007] To solve the above-mentioned technical problems, this application provides the following technical solution: In a first aspect, this application provides a coal gas power generation molten salt thermal storage peak-shaving system based on steam extraction from a steam drum, comprising a boiler drum, a molten salt steam superheater, a steam turbine, a high-temperature molten salt pump, and a molten salt storage tank; wherein, the first end of the molten salt steam superheater is connected to the boiler drum; the second end of the molten salt steam superheater is connected to the steam turbine; the third end of the molten salt steam superheater is connected to the high-temperature molten salt pump; and the fourth end of the molten salt steam superheater is connected to the molten salt storage tank; Under low-load conditions, the molten salt steam superheater obtains steam from the boiler drum to maintain a heat preservation state; under high-load conditions, the molten salt steam superheater uses the molten salt storage tank to heat the steam obtained from the boiler drum to obtain superheated steam, and then transmits the superheated steam to the steam turbine.

[0008] Furthermore, the steam turbine includes a high-pressure cylinder and a medium- and low-pressure cylinder; the system also includes a molten salt steam reheater; wherein the molten salt steam reheater heats the low-temperature wet saturated steam obtained from the high-pressure cylinder of the steam turbine and then outputs it to the medium- and low-pressure cylinder of the steam turbine.

[0009] Furthermore, the molten salt storage tank includes a single molten salt storage tank; the first end of the single molten salt storage tank is connected to the molten salt steam superheater; and the second end of the molten salt storage tank is connected to the high-temperature molten salt pump.

[0010] Furthermore, the molten salt storage tank includes a high-temperature molten salt storage tank and a low-temperature molten salt storage tank; the high-temperature molten salt storage tank is connected to the high-temperature molten salt pump; and the low-temperature molten salt storage tank is connected to the molten salt steam superheater.

[0011] Furthermore, the gas-fired power generation molten salt thermal storage peak-shaving system based on steam drum extraction also includes a boiler reheater; the boiler reheater dehumidifies the low-temperature wet saturated steam obtained from the high-pressure cylinder of the steam turbine and outputs it to the medium and low-pressure cylinder of the steam turbine.

[0012] Secondly, this application provides a method for peak shaving of coal gas power generation using molten salt thermal storage based on steam drum extraction, applied to the aforementioned coal gas power generation system using molten salt thermal storage based on steam drum extraction, comprising: Under low load conditions, the steam regulating valve located between the boiler drum and the molten salt steam superheater is controlled so that the molten salt steam superheater obtains steam from the boiler drum to maintain the heat preservation state; and the power of the high-temperature molten salt pump is adjusted so that the molten salt steam superheater obtains molten salt from the molten salt storage tank at a rate less than the preset flow threshold under the action of the high-temperature molten salt pump. Under high-load conditions, the steam regulating valve located between the boiler drum and the molten salt steam superheater is controlled so that the molten salt steam superheater obtains steam from the boiler drum and heats it to obtain superheated steam, which is then transmitted to the steam turbine. The power of the high-temperature molten salt pump is also adjusted so that the molten salt steam superheater obtains molten salt from the molten salt storage tank at a flow rate greater than a preset threshold under the action of the high-temperature molten salt pump.

[0013] Thirdly, this application provides a molten salt thermal storage peak-shaving device for coal gas power generation based on steam drum extraction, comprising: The low-load operating condition control unit is used to control the steam regulating valve installed between the boiler drum and the molten salt steam superheater under low-load conditions, so that the molten salt steam superheater can obtain steam from the boiler drum to maintain the heat preservation state; and to adjust the power of the high-temperature molten salt pump so that the molten salt steam superheater can obtain molten salt from the molten salt storage tank at a rate lower than the preset flow rate threshold under the action of the high-temperature molten salt pump. The high-load operating condition control unit is used to control the steam regulating valve located between the boiler drum and the molten salt steam superheater under high-load conditions, so that the molten salt steam superheater can obtain steam from the boiler drum and heat it to obtain superheated steam, and then transmit the superheated steam to the steam turbine; and to adjust the power of the high-temperature molten salt pump so that the molten salt steam superheater can obtain molten salt from the molten salt storage tank with a flow rate greater than a preset threshold under the action of the high-temperature molten salt pump.

[0014] Thirdly, this application provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the method for peak shaving of molten salt thermal storage for coal gas power generation based on steam extraction from a steam drum.

[0015] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the described method for peak shaving of coal gas power generation using molten salt thermal storage based on steam extraction from a steam drum.

[0016] Fifthly, this application provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the steps of the described method for peak shaving of molten salt thermal storage in coal gas power generation based on steam extraction from a steam drum.

[0017] To address the problems in existing technologies, the method and apparatus for molten salt thermal energy storage and peak shaving of coal gas power generation based on steam drum extraction provided in this application can use the thermal energy storage medium to heat the steam drum extraction, eliminating the process of preheating and evaporating the low-temperature feedwater through stepwise heating of the thermal energy storage medium, reducing the number and complexity of system equipment, reducing heat loss during the heat exchange process, and improving the efficiency of the thermal energy storage and peak shaving system; it can flexibly adjust the amount of steam entering the turbine to perform work by adjusting the output of superheated steam, thereby realizing peak shaving and valley filling of generator power, and combining the characteristics of industrial electricity consumption to utilize existing coal gas resources in an "on-demand storage-release" manner, reducing the impact of special power rationing periods on industrial users' production, and ensuring the continuous power supply for industrial users' production. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is one of the structural diagrams of the molten salt thermal storage peak-shaving system for coal gas power generation based on steam drum extraction in the embodiments of this application; Figure 2 This is the second structural diagram of the molten salt thermal storage peak-shaving system for coal gas power generation based on steam drum extraction in the embodiments of this application; Figure 3 This is the third structural diagram of the molten salt thermal storage peak-shaving system for coal gas power generation based on steam drum extraction in the embodiments of this application; Figure 4 This is one of the structural diagrams of the molten salt section of the gas-fired power generation molten salt thermal storage peak-shaving system based on steam drum extraction in the embodiments of this application; Figure 5 This is the second structural diagram of the molten salt section of the gas-fired power generation molten salt thermal storage peak-shaving system based on steam drum extraction in the embodiments of this application; Figure 6 This is a flowchart of the gas-fired power generation molten salt thermal storage peak shaving method based on steam drum extraction in the embodiments of this application; Figure 7 This is a structural diagram of the molten salt thermal storage peak-shaving device for coal gas power generation based on steam drum extraction in the embodiments of this application; Figure 8 This is a schematic diagram of the structure of the electronic device in the embodiments of this application. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0021] The information collected in the technical solution of this application is information and data authorized by the user or fully authorized by all parties. The collection, storage, use, processing, transmission, provision, disclosure and application of the relevant data all comply with the relevant laws, regulations and standards of the relevant countries and regions, necessary confidentiality measures have been taken, and they do not violate public order and good morals. Corresponding operation portals are provided for users to choose to authorize or refuse.

[0022] Provide users with corresponding operation entry points, allowing them to choose to agree to or reject the automated decision results; if the user chooses to reject, the process will proceed to the expert decision-making process.

[0023] In one embodiment, see Figure 1 In order to flexibly adjust the amount of steam entering the turbine to perform work by regulating the output of superheated steam, thereby achieving peak shaving and valley filling of generator power, this application provides a coal gas power generation molten salt thermal storage peak shaving system based on steam drum extraction, including a boiler drum 1, a molten salt steam superheater 3, a turbine 4 (including a high-pressure cylinder 41 and a medium- and low-pressure cylinder 42), a high-temperature molten salt pump 10, and a molten salt storage tank 11 (specifically, a high-temperature molten salt storage tank 111, a low-temperature molten salt storage tank 112, or a single-tank molten salt storage tank 113); wherein, the first end of the molten salt steam superheater 3 is connected to the boiler drum 1; the second end of the molten salt steam superheater 3 is connected to the turbine 4; the third end of the molten salt steam superheater 3 is connected to the high-temperature molten salt pump 10; and the fourth end of the molten salt steam superheater 3 is connected to the molten salt storage tank 11; Under low load conditions, the molten salt steam superheater 3 obtains steam from the boiler drum 1 to maintain a heat preservation state; under high load conditions, the molten salt steam superheater 3 uses the molten salt storage tank 11 to heat the steam obtained from the boiler drum 1 to obtain superheated steam, and then transmits the superheated steam to the steam turbine 4.

[0024] In one embodiment, see Figure 1 and Figure 4 The molten salt storage tank 11 includes a high-temperature molten salt storage tank 111 and a low-temperature molten salt storage tank 112; the high-temperature molten salt storage tank 111 is connected to the high-temperature molten salt pump 10; and the low-temperature molten salt storage tank 112 is connected to the molten salt steam superheater 3.

[0025] Understandably, see Figure 1 The molten salt thermal storage peak-shaving system for coal gas power generation based on steam extraction from the steam drum provided in this application includes a molten salt system and a steam-water system; wherein, the steam-water system includes a boiler steam drum 1, a boiler superheater 2, a steam turbine 4, a condenser 5, an economizer 6, a boiler water-cooled wall 7, and a boiler reheater 8, etc.; the molten salt system includes a molten salt steam superheater 3, a molten salt steam reheater 9, a high-temperature molten salt pump 10, and a molten salt storage tank 11, etc.

[0026] During periods when low-load power generation is required, the molten salt steam superheater 3 operates in a heat preservation state.

[0027] During periods when high-load power generation is required, the flow of new steam is increased by releasing heat through molten salt, thereby increasing power generation capacity.

[0028] For the molten salt system, the high-temperature molten salt in the high-temperature molten salt storage tank 111 is pressurized by the high-temperature molten salt pump 10 and sent to the tube side of the molten salt steam superheater 3 through the heat-insulated and heat-traced molten salt pipeline. After exchanging heat with the saturated steam and cooling down, it flows back to the low-temperature molten salt storage tank 112 through the heat-insulated and heat-traced molten salt pipeline, completing the heat release process.

[0029] In one embodiment, see Figure 2 The exhaust steam from the high-pressure cylinder 41 of the steam turbine is reheated. The flow rate of the exhaust steam from the high-pressure cylinder 41 of the steam turbine is controlled by the first steam regulating valve 141 and the second steam regulating valve 142. Part of it enters the boiler reheater 8 through the cold section of the reheat pipeline to exchange heat with the high-temperature flue gas of the boiler. The other part enters the molten salt steam reheater 9 through the cold section branch pipe of the reheat pipeline to exchange heat indirectly with the high-temperature molten salt on the tube side. After the two are combined, they enter the intermediate and low-pressure cylinder 42 of the steam turbine through the hot section of the reheat pipeline to continue to do work.

[0030] In one embodiment, see Figure 2 and Figure 3 The steam turbine 4 includes a high-pressure cylinder 41 and a medium- and low-pressure cylinder 42; the system also includes a molten salt steam reheater 9; wherein the molten salt steam reheater 9 heats the low-temperature wet saturated steam obtained from the high-pressure cylinder 41 and outputs it to the medium- and low-pressure cylinder 42.

[0031] In one embodiment, see Figure 2 and Figure 3 The gas-fired power generation molten salt thermal storage peak-shaving system based on steam drum extraction also includes a boiler reheater 8; the boiler reheater 8 dehumidifies the low-temperature wet saturated steam obtained by the high-pressure cylinder 41 of the steam turbine and outputs it to the low-pressure cylinder 42 of the steam turbine.

[0032] Preferably, the exhaust steam from the high-pressure cylinder 41 of the steam turbine is reheated. All the exhaust steam from the high-pressure cylinder 41 is reheated by the boiler reheater 8 and then enters the intermediate and low-pressure cylinder 42 of the steam turbine to continue to do work.

[0033] In one embodiment, see Figure 3 The system also includes a molten salt steam reheater 9. The molten salt pipeline at the outlet of the high-temperature molten salt pump 10 controls the molten salt flow rate through a first molten salt regulating valve 121 and a second molten salt regulating valve 122, so that part of the molten salt enters the tube side of the molten salt steam superheater 3 and the other part enters the tube side of the molten salt steam reheater 9.

[0034] For the steam-water system, the feedwater flow rate and the feedwater evaporation rate in the boiler water-cooled wall 7 are increased. High-pressure feedwater enters the economizer 6 for heating through the high-pressure feedwater pipeline, and then enters the steam drum 1 through the connecting pipe. In the boiler water-cooled wall 7, saturated steam is generated and enters the steam drum 1 through the riser pipe. Steam-water separation is completed in the steam drum 1. The separated water phase enters the boiler water-cooled wall 7 through the downcomer pipe for further heating. The flow rate of the separated saturated steam is controlled by the first steam regulating valve 131 and the second steam regulating valve 132. Part of it exchanges heat with the high-temperature flue gas of the boiler through the original boiler superheater 2, and the other part exchanges heat indirectly with the molten salt on the shell side and the tube side of the molten salt steam superheater 3. The superheated steam generated is combined and enters the steam turbine 4 through the hot steam pipeline to do work. The exhaust steam after doing work is condensed in the condenser 5 to complete the cycle.

[0035] In one embodiment, see Figure 5 The molten salt storage tank 11 includes a single molten salt storage tank 113; the first end of the single molten salt storage tank 113 is connected to the molten salt steam superheater 3; and the second end of the molten salt storage tank 11 is connected to the high-temperature molten salt pump 10.

[0036] When using a single molten salt storage tank 113, the molten salt is sent to the molten salt steam superheater 3 via the molten salt pump 10. After exchanging heat with saturated steam, it returns to the single molten salt storage tank 113. The temperature difference before and after the molten salt heat exchange is between 25 and 150 ℃. Considering the heat release time, the selection of the molten salt tank and the stability of the steam production parameters, 50 ℃ is preferred.

[0037] In one embodiment, see Figure 6 A method for peak shaving of coal gas power generation using molten salt thermal storage based on steam drum extraction, applied to the aforementioned coal gas power generation molten salt thermal storage peak shaving system based on steam drum extraction, comprising: S101: Under low load conditions, control the steam regulating valve set between the boiler drum 1 and the molten salt steam superheater 3 so that the molten salt steam superheater 3 can obtain steam from the boiler drum 1 to maintain the heat preservation state; and adjust the power of the high temperature molten salt pump 10 so that the molten salt steam superheater 3 can obtain molten salt less than the preset flow threshold from the molten salt storage tank 11 under the action of the high temperature molten salt pump 10. S102: Under high load conditions, control the steam regulating valve set between the boiler drum 1 and the molten salt steam superheater 3 so that the molten salt steam superheater 3 obtains steam from the boiler drum 1 and heats it to obtain superheated steam, and transmits the superheated steam to the steam turbine 4; and adjust the power of the high-temperature molten salt pump 10 so that the molten salt steam superheater 3 obtains molten salt from the molten salt storage tank 11 with a flow rate greater than the preset threshold under the action of the high-temperature molten salt pump 10.

[0038] It is understood that the implementing entity in the embodiments of this application may be, but is not limited to, a distributed control system (DCS). The process flow is described below. Figure 1 As shown in the diagram. The dotted lines represent molten salt pipelines, the dashed lines represent superheated steam pipelines, and the solid lines represent water supply pipelines.

[0039] Molten salt related pipelines: The high-temperature molten salt in the high-temperature molten salt storage tank is transported to the molten salt steam superheater by a high-temperature pump. After exchanging heat with saturated steam to cool down, it is sent to the low-temperature molten salt for heat storage to complete the heat release process.

[0040] Steam and water related pipelines: Saturated steam is drawn from the boiler drum of the original generator set and sent to the molten salt steam superheater. After being heated by molten salt, superheated steam is generated and then fed into the main steam pipeline of the original generator set.

[0041] During periods requiring low-load power generation, the generator set operates at low load, and the molten salt steam superheater operates in insulation mode. The high-temperature molten salt pump 10 reduces its output, allowing less high-temperature molten salt to enter the molten salt superheater 3. Simultaneously, the first steam regulating valve 131 and the second steam regulating valve 132 are adjusted so that the saturated steam from the steam drum mainly enters the boiler superheater 2, with only a small amount of saturated steam entering the molten salt superheater 3, maintaining insulation mode. A portion of the heat energy generated by the combustion of coal gas heats the molten salt, which is stored as heat energy in the high-temperature molten salt storage tank.

[0042] During periods of high-load power generation, molten salt releases heat to heat saturated steam. The steam-water system increases the feedwater flow rate and the evaporation rate of feedwater in the boiler water-cooled walls. High-pressure feedwater, heated by the economizer, enters the steam drum and evaporates in the boiler water-cooled walls to produce saturated steam. Steam-water separation is completed in the steam drum, increasing the heat absorption of the original generator set's evaporation section, thereby increasing the original unit's saturated steam production. Part of the saturated steam is heated by the original boiler superheater, and the other part is heated by the molten salt steam superheater. The high-temperature molten salt stored in the high-temperature molten salt storage tank 11 releases heat, and the high-temperature molten salt pump 10 increases its output, allowing sufficient high-temperature molten salt to enter the molten salt superheater 3. At the same time, the first steam regulating valve 131 and the second steam regulating valve 132 are adjusted so that the additional saturated steam produced enters the molten salt superheater 3 for superheating, increasing the superheated steam production and thus increasing the flow rate of new steam in the boiler. The combined new steam then enters the turbine to perform work, increasing the generator set's power output.

[0043] As can be seen from the above description, the molten salt thermal storage peak shaving method for coal gas power generation based on steam drum extraction provided in this application can use the thermal storage medium to heat the steam drum extraction, eliminating the process of preheating and evaporating the low-temperature feedwater through step-by-step heating of the thermal storage medium, reducing the number and complexity of system equipment, reducing heat loss in the heat exchange process, and improving the efficiency of the thermal storage peak shaving system; it can flexibly adjust the amount of steam entering the turbine to participate in work by adjusting the output of superheated steam, thereby realizing peak shaving and valley filling of generator power, and combining the characteristics of industrial electricity consumption to carry out "on-demand storage-release" utilization of existing coal gas resources, reducing the impact of special power rationing periods on industrial users' production, and ensuring the continuous power supply for industrial users' production.

[0044] Based on the same inventive concept, this application also provides a molten salt thermal storage peak-shaving device for coal gas power generation based on steam drum extraction, which can be used to implement the method described in the above embodiments, as described in the following embodiments. Since the principle of solving the problem by the molten salt thermal storage peak-shaving device for coal gas power generation based on steam drum extraction is similar to that of the method for peak-shaving of coal gas power generation based on steam drum extraction, the implementation of the molten salt thermal storage peak-shaving device for coal gas power generation based on steam drum extraction can refer to the implementation of the software performance benchmark determination method, and repeated details will not be elaborated further. As used below, the terms "unit" or "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the system described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0045] In one embodiment, see Figure 7 In order to flexibly adjust the amount of steam entering the turbine to do work by adjusting the output of superheated steam, thereby realizing peak shaving and valley filling of generator power, this application provides a coal gas power generation molten salt thermal storage peak shaving device based on steam drum extraction, including: a low load condition control unit 701 and a high load condition control unit 702.

[0046] The low-load operating condition control unit 701 is used to control the steam regulating valve installed between the boiler drum and the molten salt steam superheater under low-load operating conditions, so that the molten salt steam superheater can obtain steam from the boiler drum to maintain the heat preservation state; and to adjust the power of the high-temperature molten salt pump so that the molten salt steam superheater can obtain molten salt from the molten salt storage tank at a rate less than a preset flow rate threshold under the action of the high-temperature molten salt pump. The high-load operating condition control unit 702 is used to control the steam regulating valve installed between the boiler drum and the molten salt steam superheater under high-load conditions, so that the molten salt steam superheater can obtain steam from the boiler drum and heat it to obtain superheated steam, and transmit the superheated steam to the steam turbine; and to adjust the power of the high-temperature molten salt pump so that the molten salt steam superheater can obtain molten salt from the molten salt storage tank with a flow rate greater than a preset threshold under the action of the high-temperature molten salt pump.

[0047] From a hardware perspective, in order to flexibly adjust the amount of steam entering the turbine to perform work by regulating the output of superheated steam, thereby achieving peak shaving and valley filling of generator power, this application provides an embodiment of an electronic device for implementing all or part of the above-mentioned coal gas power generation molten salt thermal storage peak shaving method based on steam drum extraction. The electronic device specifically includes the following: The system comprises a processor, a memory, a communications interface, and a bus; wherein the processor, memory, and communications interface communicate with each other via the bus; the communications interface is used to realize information transmission between the gas-fired power generation molten salt thermal storage peak-shaving device based on steam drum extraction and the core business system, user terminals, and related databases and other related equipment; the logic controller can be a desktop computer, tablet computer, or mobile terminal, etc., and this embodiment is not limited to these. In this embodiment, the logic controller can be implemented with reference to the embodiments of the gas-fired power generation molten salt thermal storage peak-shaving method based on steam drum extraction and the embodiments of the gas-fired power generation molten salt thermal storage peak-shaving device based on steam drum extraction, the contents of which are incorporated herein, and repeated details will not be described again.

[0048] It is understood that the user terminal may include smartphones, tablet computers, network set-top boxes, portable computers, desktop computers, personal digital assistants (PDAs), in-vehicle devices, smart wearable devices, etc. Among these, the smart wearable devices may include smart glasses, smartwatches, smart bracelets, etc.

[0049] In practical applications, the peak-shaving method for coal gas power generation based on steam drum extraction and molten salt thermal storage can be partially executed on the electronic device side as described above, or all operations can be completed in the client device. The choice can be made based on the processing power of the client device and the limitations of the user's usage scenario. This application does not impose any limitations on this. If all operations are completed in the client device, the client device may further include a processor.

[0050] The aforementioned client device may have a communication module (i.e., a communication unit) that can communicate with a remote server to achieve data transmission. The server may include a server on the task scheduling center side; in other implementation scenarios, it may also include a server on an intermediate platform, such as a server on a third-party server platform that has a communication link with the task scheduling center server. The server may include a single computer device, a server cluster consisting of multiple servers, or a distributed server structure.

[0051] Figure 8 This is a schematic block diagram illustrating the system configuration of the electronic device 9600 according to an embodiment of this application. Figure 8 As shown, the electronic device 9600 may include a central processing unit 9100 and a memory 9140; the memory 9140 is coupled to the central processing unit 9100. It is worth noting that... Figure 8 This is an example; other types of structures can also be used to supplement or replace this structure to achieve telecommunications functions or other functions.

[0052] In one embodiment, the peak-shaving function of the gas-fired power generation molten salt thermal energy storage method based on steam drum extraction can be integrated into the central processing unit 9100. The central processing unit 9100 can be configured to perform the following control: S101: Under low load conditions, control the steam regulating valve set between the boiler drum 1 and the molten salt steam superheater 3 so that the molten salt steam superheater 3 can obtain steam from the boiler drum 1 to maintain the heat preservation state; and adjust the power of the high temperature molten salt pump 10 so that the molten salt steam superheater 3 can obtain molten salt less than the preset flow threshold from the molten salt storage tank 11 under the action of the high temperature molten salt pump 10. S102: Under high load conditions, control the steam regulating valve set between the boiler drum 1 and the molten salt steam superheater 3 so that the molten salt steam superheater 3 obtains steam from the boiler drum 1 and heats it to obtain superheated steam, and transmits the superheated steam to the steam turbine 4; and adjust the power of the high-temperature molten salt pump 10 so that the molten salt steam superheater 3 obtains molten salt from the molten salt storage tank 11 with a flow rate greater than the preset threshold under the action of the high-temperature molten salt pump 10.

[0053] As can be seen from the above description, the molten salt thermal storage peak shaving method for coal gas power generation based on steam drum extraction provided in this application can use the thermal storage medium to heat the steam drum extraction, eliminating the process of preheating and evaporating the low-temperature feedwater through step-by-step heating of the thermal storage medium, reducing the number and complexity of system equipment, reducing heat loss in the heat exchange process, and improving the efficiency of the thermal storage peak shaving system; it can flexibly adjust the amount of steam entering the turbine to participate in work by adjusting the output of superheated steam, thereby realizing peak shaving and valley filling of generator power, and combining the characteristics of industrial electricity consumption to carry out "on-demand storage-release" utilization of existing coal gas resources, reducing the impact of special power rationing periods on industrial users' production, and ensuring the continuous power supply for industrial users' production.

[0054] In another embodiment, the gas-fired power generation molten salt thermal storage peak shaving device based on steam drum extraction can be configured separately from the central processing unit 9100. For example, the data composite transmission device based on steam drum extraction gas-fired power generation molten salt thermal storage peak shaving device can be configured as a chip connected to the central processing unit 9100, and the function of the gas-fired power generation molten salt thermal storage peak shaving method based on steam drum extraction can be realized through the control of the central processing unit.

[0055] like Figure 8 As shown, the electronic device 9600 may further include: a communication module 9110, an input unit 9120, an audio processor 9130, a display 9160, and a power supply 9170. It is worth noting that the electronic device 9600 does not necessarily need to include these components. Figure 8 All components shown; in addition, the electronic device 9600 may also include Figure 8For components not shown, please refer to existing technologies.

[0056] like Figure 8 As shown, the central processing unit 9100, sometimes also referred to as a controller or operating control, may include a microprocessor or other processor device and / or logic device, which receives inputs and controls the operation of various components of the electronic device 9600.

[0057] The memory 9140 may be, for example, one or more of a cache, flash memory, hard drive, removable media, volatile memory, non-volatile memory, or other suitable devices. It may store the aforementioned failure-related information, and also store a program for executing that information. The central processing unit 9100 may execute the program stored in the memory 9140 to perform information storage or processing, etc.

[0058] Input unit 9120 provides input to central processing unit 9100. Input unit 9120 may be, for example, a keypad or touch input device. Power supply 9170 provides power to electronic device 9600. Display 9160 displays images and text. Display may be, for example, an LCD display, but is not limited thereto.

[0059] The memory 9140 can be a solid-state memory, such as a read-only memory (ROM), random access memory (RAM), a SIM card, etc. It can also be a memory that retains information even when power is off, can be selectively erased, and contains more data; examples of this type of memory are sometimes referred to as EPROMs. The memory 9140 can also be some other type of device. The memory 9140 includes a buffer memory 9141 (sometimes referred to as a buffer). The memory 9140 may include an application / function storage unit 9142 for storing application programs and function programs or processes for executing the operation of the electronic device 9600 via the central processing unit 9100.

[0060] The memory 9140 may also include a data storage unit 9143 for storing data, such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. The driver storage unit 9144 of the memory 9140 may include various drivers for the electronic device's communication functions and / or for performing other functions of the electronic device (such as messaging applications, address book applications, etc.).

[0061] The communication module 9110 is a transmitter / receiver that sends and receives signals via the antenna 9111. The communication module (transmitter / receiver) 9110 is coupled to the central processing unit 9100 to provide input signals and receive output signals, which is the same as in a conventional mobile communication terminal.

[0062] Based on different communication technologies, multiple communication modules 9110 can be configured in the same electronic device, such as cellular network modules, Bluetooth modules, and / or wireless LAN modules. The communication module (transmitter / receiver) 9110 is also coupled to a speaker 9131 and a microphone 9132 via an audio processor 9130 to provide audio output via the speaker 9131 and receive audio input from the microphone 9132, thereby realizing typical telecommunications functions. The audio processor 9130 may include any suitable buffer, decoder, amplifier, etc. Additionally, the audio processor 9130 is also coupled to a central processing unit 9100, enabling on-device recording via the microphone 9132 and on-device playback of stored sound via the speaker 9131.

[0063] Embodiments of this application also provide a computer-readable storage medium capable of implementing all steps of the gas-fired power generation molten salt thermal storage peak shaving method based on steam drum extraction, where the execution subject is a server or client, as described in the above embodiments. The computer-readable storage medium stores a computer program that, when executed by a processor, implements all steps of the gas-fired power generation molten salt thermal storage peak shaving method based on steam drum extraction, where the execution subject is a server or client, as described in the above embodiments. For example, when the processor executes the computer program, it implements the following steps: S101: Under low load conditions, control the steam regulating valve set between the boiler drum 1 and the molten salt steam superheater 3 so that the molten salt steam superheater 3 can obtain steam from the boiler drum 1 to maintain the heat preservation state; and adjust the power of the high temperature molten salt pump 10 so that the molten salt steam superheater 3 can obtain molten salt less than the preset flow threshold from the molten salt storage tank 11 under the action of the high temperature molten salt pump 10. S102: Under high load conditions, control the steam regulating valve set between the boiler drum 1 and the molten salt steam superheater 3 so that the molten salt steam superheater 3 obtains steam from the boiler drum 1 and heats it to obtain superheated steam, and transmits the superheated steam to the steam turbine 4; and adjust the power of the high-temperature molten salt pump 10 so that the molten salt steam superheater 3 obtains molten salt from the molten salt storage tank 11 with a flow rate greater than the preset threshold under the action of the high-temperature molten salt pump 10.

[0064] As can be seen from the above description, the molten salt thermal storage peak shaving method for coal gas power generation based on steam drum extraction provided in this application can use the thermal storage medium to heat the steam drum extraction, eliminating the process of preheating and evaporating the low-temperature feedwater through step-by-step heating of the thermal storage medium, reducing the number and complexity of system equipment, reducing heat loss in the heat exchange process, and improving the efficiency of the thermal storage peak shaving system; it can flexibly adjust the amount of steam entering the turbine to participate in work by adjusting the output of superheated steam, thereby realizing peak shaving and valley filling of generator power, and combining the characteristics of industrial electricity consumption to carry out "on-demand storage-release" utilization of existing coal gas resources, reducing the impact of special power rationing periods on industrial users' production, and ensuring the continuous power supply for industrial users' production.

[0065] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, apparatus, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0066] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (devices), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0067] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0068] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0069] Specific embodiments have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this invention. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A coal gas power generation molten salt thermal storage peak-shaving system based on steam drum extraction, characterized in that, It includes a boiler drum (1), a molten salt steam superheater (3), a steam turbine (4), a high-temperature molten salt pump (10), and a molten salt storage tank (11); wherein, the first end of the molten salt steam superheater (3) is connected to the boiler drum (1), the second end is connected to the steam turbine (4), the third end is connected to the high-temperature molten salt pump (10), and the fourth end is connected to the molten salt storage tank (11); Under low load conditions, the molten salt steam superheater (3) obtains steam from the boiler drum (1) to maintain the heat preservation state; under high load conditions, the molten salt steam superheater (3) uses the molten salt storage tank (11) to heat the steam obtained from the boiler drum (1) to obtain superheated steam, and transmits the superheated steam to the steam turbine (4).

2. The gas-fired power generation molten salt thermal storage peak-shaving system based on steam drum extraction according to claim 1, characterized in that, The steam turbine (4) includes a high-pressure cylinder (41) and a medium-low pressure cylinder (42); the system also includes a molten salt steam reheater (9); wherein the molten salt steam reheater (9) heats the low-temperature wet saturated steam obtained from the high-pressure cylinder (41) and outputs it to the medium-low pressure cylinder (42).

3. The gas-fired power generation molten salt thermal storage peak-shaving system based on steam drum extraction according to claim 1, characterized in that, The molten salt storage tank (11) includes a single molten salt storage tank (113); the first end of the single molten salt storage tank (113) is connected to the molten salt steam superheater (3), and the second end is connected to the high-temperature molten salt pump (10).

4. The gas-fired power generation molten salt thermal storage peak-shaving system based on steam drum extraction according to claim 1, characterized in that, The molten salt storage tank (11) includes a high-temperature molten salt storage tank (111) and a low-temperature molten salt storage tank (112); the high-temperature molten salt storage tank (111) is connected to the high-temperature molten salt pump (10); the low-temperature molten salt storage tank (112) is connected to the molten salt steam superheater (3).

5. The gas-fired power generation molten salt thermal storage peak-shaving system based on steam drum extraction according to claim 2, characterized in that, It also includes a boiler reheater (8); the boiler reheater (8) dehumidifies the low-temperature wet saturated steam obtained by the high-pressure cylinder (41) of the steam turbine and outputs it to the low-pressure cylinder (42) of the steam turbine.

6. A method for peak shaving of coal gas power generation using molten salt thermal storage based on steam drum extraction, applied to the coal gas power generation molten salt thermal storage peak shaving system based on steam drum extraction as described in any one of claims 1 to 5, characterized in that, include: Under low load conditions, the steam regulating valve located between the boiler drum (1) and the molten salt steam superheater (3) is controlled so that the molten salt steam superheater (3) obtains steam from the boiler drum (1) to maintain the heat preservation state; and the power of the high temperature molten salt pump (10) is adjusted so that the molten salt steam superheater (3) obtains molten salt less than the preset flow threshold from the molten salt storage tank (11) under the action of the high temperature molten salt pump (10); Under high load conditions, the steam regulating valve set between the boiler drum (1) and the molten salt steam superheater (3) is controlled so that the molten salt steam superheater (3) obtains steam from the boiler drum (1) and heats it to obtain superheated steam, and transmits the superheated steam to the steam turbine (4); and the power of the high temperature molten salt pump (10) is adjusted so that the molten salt steam superheater (3) obtains molten salt greater than the preset flow threshold from the molten salt storage tank (11) under the action of the high temperature molten salt pump (10).

7. A molten salt thermal storage peak-shaving device for coal gas power generation based on steam drum extraction, characterized in that, include: The low-load operating condition control unit is used to control the steam regulating valve set between the boiler drum (1) and the molten salt steam superheater (3) under low-load operating conditions, so that the molten salt steam superheater (3) can obtain steam from the boiler drum (1) to maintain the heat preservation state; and to adjust the power of the high-temperature molten salt pump (10) so that the molten salt steam superheater (3) can obtain molten salt less than the preset flow threshold from the molten salt storage tank (11) under the action of the high-temperature molten salt pump (10); The high-load operating condition control unit is used to control the steam regulating valve set between the boiler drum (1) and the molten salt steam superheater (3) under high-load conditions, so that the molten salt steam superheater (3) can obtain steam from the boiler drum (1) and heat it to obtain superheated steam, and transmit the superheated steam to the steam turbine (4); and adjust the power of the high-temperature molten salt pump (10) so that the molten salt steam superheater (3) can obtain molten salt greater than the preset flow rate threshold from the molten salt storage tank (11) under the action of the high-temperature molten salt pump (10).

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the molten salt thermal storage peak-shaving method for coal gas power generation based on steam extraction from the steam drum as described in claim 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the gas-fired power generation molten salt thermal storage peak-shaving method based on steam extraction from a steam drum as described in claim 6.

10. A computer program product comprising a computer program / instructions, characterized in that, When the computer program / instruction is executed by the processor, it implements the steps of the molten salt thermal storage peak shaving method for coal gas power generation based on steam extraction from the steam drum as described in claim 6.

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