Geothermal energy and biomass energy coupled dual heat source refrigeration drying system

Abstract

The present application relates to the field of refrigeration technology, and particularly relates to a geothermal energy combined with biomass energy coupling double heat source refrigeration drying system, which comprises a heat source system, a refrigeration cycle pipeline and a chilled water external circulation pipeline, wherein the heat source system comprises a biomass energy heat source and a geothermal water heat source; the refrigeration cycle pipeline is connected with the biomass energy heat source and the geothermal water heat source; the refrigeration cycle pipeline is provided with an evaporator; the chilled water external circulation pipeline is connected with the evaporator; the evaporator can absorb the heat of a medium to be cooled in the chilled water external circulation pipeline, and can generate chilled water; and the chilled water external circulation pipeline transmits the chilled water for external refrigeration. In the technical scheme of the present application, the geothermal energy and the biomass energy are used to provide heat energy for the refrigeration system, so as to reduce the refrigeration cost and reduce the carbon emission.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of refrigeration technology, in particular to a geothermal energy combined with biomass energy coupling double heat source refrigeration drying system. BACKGROUND

[0002] With the increasing emphasis on sustainable development and environmental protection worldwide, energy development is rapidly changing towards clean, efficient and renewable direction. The proportion of renewable energy such as solar energy, wind energy and water energy is increasing, while the use of fossil fuels is gradually decreasing.

[0003] In the related field of absorption refrigeration technology, the existing heating method still relies on absorption refrigeration. This refrigeration system provides the required heat energy by burning combustible media such as natural gas, liquefied petroleum gas or oil. Since the system relies on the combustion of these fossil fuels to provide heat energy, it will produce a large amount of carbon dioxide. In addition, as the global pressure to reduce greenhouse gas emissions increases, the price of natural gas may rise, thereby increasing operating costs. Therefore, finding cleaner and more economical alternative energy sources is crucial for the future development of refrigeration systems.

[0004] In the southern region of China, biomass energy and geothermal energy show great potential due to their abundant resources and low environmental impact. Biomass energy is derived from renewable resources such as agricultural waste and forestry byproducts, which can be converted into heat or electricity through efficient conversion technology, reducing dependence on fossil fuels. Geothermal energy utilizes the internal heat of the earth and uses a geothermal pump system for heating and cooling, with high energy efficiency and low environmental impact. SUMMARY

[0005] The main purpose of the present application is to provide a geothermal energy combined with biomass energy coupling double heat source refrigeration drying system, which aims to provide heat energy for the refrigeration system by using geothermal energy and biomass energy, thereby reducing refrigeration costs and reducing carbon emissions.

[0006] To achieve the above purpose, the geothermal energy combined with biomass energy coupling double heat source refrigeration drying system comprises:

[0007] A heat source system, the heat source system comprises a biomass energy heat source and a geothermal water heat source;

[0008] A refrigeration cycle pipeline, the refrigeration cycle pipeline is in pipeline communication with the biomass energy heat source and the geothermal water heat source; the refrigeration cycle pipeline is provided with an evaporator; and

[0009] A chilled water external circulation pipeline, the chilled water external circulation pipeline is in communication with the evaporator; the evaporator can absorb the heat of the medium to be cooled in the chilled water external circulation pipeline, and can generate chilled water; the chilled water external circulation pipeline transmits the chilled water for external refrigeration.

[0010] In an embodiment of the present application, the refrigeration cycle pipeline comprises a refrigeration sub-pipeline and a solvent circulation pipeline;

[0011] The refrigeration sub-pipeline comprises a secondary pressure generator, a condenser and an evaporator connected in sequence by pipelines, the secondary pressure generator is connected with the biomass energy heat source and the geothermal water heat source by pipelines, and the secondary pressure generator is provided with a refrigerant which flows to the evaporator through a pipeline;

[0012] The solvent circulation pipeline comprises an absorber and a heat exchanger assembly connected by pipelines, the absorber is connected with the evaporator, and the heat exchanger assembly is connected with the secondary pressure generator;

[0013] In the evaporator, the refrigerant absorbs heat of the medium to be cooled and becomes a first vapor, the absorber is provided with a first vapor absorption liquid which can absorb the first vapor to form a solution to be separated, and the solution to be separated enters the secondary pressure generator for heating through the heat exchanger assembly.

[0014] In an embodiment of the present application, the secondary pressure generator comprises a high-pressure generator and a low-pressure generator connected in sequence by pipelines, the high-pressure generator is connected with the biomass energy heat source, and the low-pressure generator is connected with the geothermal water heat source and the condenser; and the heat exchanger assembly is connected with the high-pressure generator and the low-pressure generator respectively.

[0015] In an embodiment of the present application, the heat exchanger assembly comprises a high-temperature heat exchanger and a low-temperature heat exchanger, the high-temperature heat exchanger is connected with the high-pressure generator by a pipeline, and the low-temperature heat exchanger is connected with the low-pressure generator by a pipeline.

[0016] In an embodiment of the present application, the geothermal energy combined with biomass energy coupling double-heat-source refrigeration and drying system further comprises a cooling circulation pipeline connected with the condenser and the absorber by pipelines; and the cooling circulation pipeline can absorb heat generated in the absorber.

[0017] In an embodiment of the present application, the cooling circulation pipeline comprises a cooling tower and a cooling water pump connected in sequence by pipelines, the cooling tower is connected with the condenser by a pipeline, and the cooling water pump is connected with the absorber by a pipeline.

[0018] In an embodiment of the present application, the geothermal energy combined with biomass energy coupling double-heat-source refrigeration and drying system further comprises a drying device; and the low-pressure generator is connected with the drying device by a pipeline to form a drying branch.

[0019] In an embodiment of the present application, the dry branch is provided with a biomass energy water supplementing and pressure supplementing branch, which is in pipeline communication with the low-pressure generator and a biomass energy heat source.

[0020] In an embodiment of the present application, the dry branch is provided with a first electrically-operated regulating valve, which is in communication with the drying device and the low-pressure generator.

[0021] The biomass energy water supplementing and pressure supplementing branch is provided with a second electrically-operated regulating valve, which is arranged between the first electrically-operated regulating valve and the low-pressure generator; the second electrically-operated regulating valve is in communication with the low-pressure generator and the biomass energy heat source.

[0022] In an embodiment of the present application, first and second flow regulating valves are arranged between the absorber and the high-temperature heat exchanger; the first flow regulating valve is used to regulate the flow of the solution to be separated from the absorber to the high-temperature heat exchanger, and the second flow regulating valve is used to regulate the flow of the first vapor absorption liquid from the high-temperature heat exchanger to the absorber.

[0023] In the technical solution of the present application, the following beneficial effects are achieved:

[0024] (1) The traditional refrigeration system usually adopts a gas absorption refrigeration mode to provide cold load, which has a high cost. However, the geothermal energy combined with biomass energy coupled dual-heat-source refrigeration and drying system proposed in the present application utilizes geothermal energy and biomass energy, and the acquisition cost of these two kinds of energy in southern regions is relatively low. Geothermal water is self-flowing and discharged, and the price of biomass fuel is low.

[0025] (2) Environmental benefits

[0026] Compared with the traditional refrigeration system, the use of geothermal energy and biomass energy significantly reduces the emission of greenhouse gases such as carbon dioxide.

[0027] (3) Social benefits:

[0028] The geothermal energy combined with biomass energy coupled dual-heat-source refrigeration and drying system has stable energy supply, reduces the dependence on external energy, improves the stability and safety of local energy supply, reduces the impact of energy supply fluctuations on social production and life, and promotes the development and application of renewable energy technologies. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only show some of the embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings also belong to the protection scope of the present application.

[0030] Figure 1 A flowchart of a geothermal energy combined with biomass energy coupling double heat source refrigeration drying system of the present application.

[0031] Explanation of reference numerals:

[0032] 1, biomass energy heat source; 2, high-pressure generator; 3, high-temperature heat exchanger; 4, first solution pump; 14, second solution pump; 5, first flow regulating valve; 6, second flow regulating valve; 7, third flow regulating valve; 8, second electric regulating valve; 9, first electric regulating valve; 10, drying device; 11, low-pressure generator; 12, low-temperature heat exchanger; 13, absorber; 15, condenser; 16, throttling valve; 17, evaporator; 18, refrigerant pump; 19, submersible pump; 20, cooling tower; 21, cooling water pump.

[0033] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the protection scope of the present application.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0036] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0037] Please refer to Figure 1 The geothermal energy combined with biomass energy coupling double heat source refrigeration drying system comprises:

[0038] A heat source system, the heat source system comprising a biomass energy heat source 1 and a geothermal water heat source;

[0039] A refrigeration cycle pipeline, the refrigeration cycle pipeline being connected with the biomass energy heat source 1 and the geothermal water heat source; the refrigeration cycle pipeline being provided with an evaporator 17; and

[0040] A chilled water external circulation pipeline, the chilled water external circulation pipeline being connected with the evaporator 17; the evaporator 17 being capable of absorbing the heat of the medium to be cooled in the chilled water external circulation pipeline and generating chilled water; the chilled water external circulation pipeline transmitting the chilled water for external refrigeration.

[0041] In the technical solution of the present application, the traditional refrigeration system usually adopts a gas absorption type refrigeration mode to provide cold load, which has a high cost. The geothermal energy combined with biomass energy coupling double heat source refrigeration drying system provided by the present application utilizes geothermal energy and biomass energy, and the acquisition cost of these two kinds of energy in southern regions is relatively low. The geothermal water is self-flowing and discharged, and the biomass fuel is cheap. Assuming that the energy cost of the traditional refrigeration system is 5143 yuan per 1 MW refrigeration capacity, the energy cost of the present system is only 3300 yuan, and the annual energy cost can be saved by 199.04 million yuan; compared with the traditional refrigeration system, the use of geothermal energy and biomass energy significantly reduces the emission of greenhouse gases such as carbon dioxide. Taking 1 MW refrigeration capacity as an example, the traditional system may emit 3337 tons of carbon dioxide per year, while the present patent system only emits 1200 tons of carbon dioxide, and the carbon dioxide emission reduction amount is 2137 tons per year; the geothermal energy combined with biomass energy coupling double heat source refrigeration drying system has stable energy supply, reduces the dependence on external energy, improves the stability and safety of local energy supply, reduces the impact of energy supply fluctuations on social production and life, and promotes the development and application of renewable energy technology.

[0042] In the embodiment, the heat source system comprises a biomass energy heat source 1 and a geothermal water heat source, which provide heat sources for the refrigeration cycle to make liquid condensant such as water into high-temperature water vapor, wherein the biomass energy heat source 1 can be obtained by a biomass boiler system (temperature is 180 degrees Celsius), the geothermal water heat source can be obtained by geothermal water (temperature is 90 degrees Celsius), the refrigerant is converted into a vapor form under the action of the biomass energy heat source 1 and the geothermal water heat source, the refrigerant becomes water in a low-temperature and high-pressure state after passing through a series of refrigeration components such as the condenser 15, the water in the low-temperature and high-pressure state can be regulated by the throttling valve 16, and enters the evaporator 17, under the action of the evaporator 17, needs to absorb heat to become the first vapor, at this time, in order to obtain sufficient heat, the evaporator 17 is connected with the chilled water external circulation pipeline, the other end of the chilled water external circulation pipeline is connected with the pipeline to be cooled or the machine or other arbitrary cooling object, the chilled water external circulation pipeline can have only one pipeline, that is, one-way flow, specifically, the chilled water external circulation pipeline returns the cooling medium (water, at this time, the temperature is 12 degrees Celsius), the water in the low-temperature and high-pressure state absorbs the heat of the cooling medium under the action of the evaporator 17, becomes the gaseous first vapor, and the cooling medium becomes the cooled medium (water, at this time, the temperature is 7 degrees Celsius) after absorbing heat, and the cooled medium is output to the pipeline to be cooled or the machine or other arbitrary cooling object through the chilled water external circulation pipeline; in another embodiment, the chilled water external circulation pipeline comprises an output branch and an input branch, the output branch is used for flowing the cooled medium (water, at this time, the temperature is 7 degrees Celsius), and the input branch is used for flowing the cooling medium (water, at this time, the temperature is 12 degrees Celsius), in this way, the circulation cooling of the cooled medium is realized through the two-way flow pipeline, so that the working efficiency is improved.

[0043] In an embodiment of the present application, the refrigeration cycle pipeline comprises a refrigeration sub-pipeline and a solvent circulation pipeline.

[0044] The refrigeration sub-pipeline comprises a secondary pressure generator, the condenser 15 and the evaporator 17 which are sequentially connected in pipeline, the secondary pressure generator is connected with the biomass energy heat source 1 and the geothermal water heat source in pipeline, the secondary pressure generator is provided with the refrigerant, the refrigerant flows to the evaporator 17 through the pipeline;

[0045] The solvent circulation pipeline comprises the absorber 13 and the heat exchanger assembly which are connected in pipeline, the absorber 13 is connected with the evaporator 17, and the heat exchanger assembly is connected with the secondary pressure generator;

[0046] The refrigerant absorbs the heat of the cooling medium in the evaporator 17, and is converted into the first vapor, the absorber 13 is provided with the first vapor absorption liquid, the first vapor absorption liquid can absorb the first vapor to become the solution to be separated, and the solution to be separated enters the secondary pressure generator to be heated through the heat exchanger assembly.

[0047] In the embodiment, the refrigeration cycle pipeline comprises a refrigeration sub-pipeline and a solvent circulation pipeline, the refrigeration sub-pipeline is used to realize refrigeration and generate first steam, and the solvent circulation pipeline is used to absorb the first steam generated by the refrigeration sub-pipeline; specifically, water is used as refrigerant. After absorbing heat energy from the biomass energy heat source 1 and the geothermal water heat source, the water becomes high-temperature and low-pressure steam through the secondary pressure generator, and then flows to the condenser 15 through the pipeline. Under the action of the condenser 15, the high-temperature and low-pressure steam becomes low-temperature and high-pressure water, which then passes through the pressure reducing valve 16 to become low-temperature and low-pressure water, and then enters the evaporator 17 to absorb heat and change into first steam. In order to ensure that the air pressure of the evaporator 17 is within a safe operating range of an equipment, the first steam in the evaporator 17 is transported to the absorber 13 of the solvent circulation pipeline through the pipeline, so as to realize the recycling and cyclic utilization of the refrigerant. The absorber 13 is provided with a first steam absorption liquid, specifically lithium bromide solution. When the first steam (water) meets the first steam absorption liquid (lithium bromide solution), the first steam (water) is absorbed and mixed into a to-be-decomposed solution. Then, under the action of the solution pump, the to-be-decomposed solution enters the heat exchanger assembly for preliminary heating. The to-be-decomposed solution after preliminary heating is transported to the secondary pressure generator. After absorbing heat energy from the biomass energy heat source 1 and the geothermal water heat source, the secondary pressure generator becomes lithium bromide solution with different concentrations and returns to the evaporator 17, so as to cyclically absorb the first steam. In this way, in the entire refrigeration system, the refrigerant and the first steam absorption liquid can be cyclically used, so as to improve the refrigeration efficiency and the material utilization rate.

[0048] In an embodiment of the application, the secondary pressure generator comprises a high-pressure generator 2 and a low-pressure generator 11 which are sequentially connected by pipelines. The high-pressure generator 2 is connected to the biomass energy heat source 1, and the low-pressure generator 11 is connected to the geothermal water heat source and the condenser 15. The heat exchanger assembly is connected to the high-pressure generator 2 and the low-pressure generator 11, respectively.

[0049] In the embodiment, the secondary pressure generator comprises a high-pressure generator 2 and a low-pressure generator 11 connected in sequence, a third flow regulating valve 7 is arranged between the high-pressure generator 2 and the low-pressure generator 11, the third flow regulating valve 7 is used for controlling and regulating the flow of refrigerant from the high-pressure generator 2 to the low-pressure generator 11, the high-pressure generator 2 is connected with the biomass energy heat source 1, and the low-pressure generator 11 is connected with the geothermal water heat source, so that the heat sources are effectively utilized, and the heat efficiency of the overall system is improved. Specifically, water is used as the refrigerant, the high-pressure generator 2 absorbs the high-temperature hot water heat energy generated by the biomass boiler system to generate high-temperature and high-pressure water vapor, the water vapor enters the low-pressure generator 11, the low-pressure generator 11 absorbs the high-temperature and high-pressure water vapor heat energy and the geothermal water heat energy to generate high-temperature and low-pressure water vapor, and the water vapor is mixed with the refrigerant steam (i.e., the refrigerant of the low-pressure generator 11 comprises two parts, one part is the refrigerant from the high-pressure generator 2, and the other part is the refrigerant from the solution to be separated and heated to be separated) from the low-pressure generator 11 after cooling to enter the condenser 15, the water vapor is condensed into low-temperature and high-pressure water, and then flows into the evaporator 17 after being reduced in pressure by the throttling valve 16 to absorb heat from the external cooling medium flowing back; in the solvent circulation pipeline, the heat exchanger assembly is correspondingly connected with the high-pressure generator 2 and the low-pressure generator 11, so that water vapor with different pressures is produced.

[0050] In an embodiment of the application, the heat exchanger assembly comprises a high-temperature heat exchanger 3 and a low-temperature heat exchanger 12; the high-temperature heat exchanger 3 is connected with the high-pressure generator 2 in the pipeline, and the low-temperature heat exchanger 12 is connected with the low-pressure generator 11 in the pipeline.

[0051] In the embodiment, the heat exchanger assembly comprises a high-temperature heat exchanger 3 and a low-temperature heat exchanger 12, the high-temperature heat exchanger 3 is connected to the high-pressure generator 2 in a pipeline, and the low-temperature heat exchanger 12 is connected to the low-pressure generator 11 in a pipeline. Specifically, the solution to be separated from the absorber 13 flows to the high-temperature heat exchanger 3 and the low-temperature heat exchanger 12 through different solution pumps, that is, the solvent circulation pipeline comprises a first branch and a second branch arranged in parallel, that is, the first branch is connected to the absorber 13, the high-temperature heat exchanger 3 and the high-pressure generator 2 through pipelines, and the second branch is connected to the absorber 13, the low-temperature heat exchanger 12 and the low-pressure generator 11 through pipelines. A part of the solution to be separated from the absorber 13 enters the high-temperature heat exchanger 3 for preliminary heat exchange through a solution pump, and then flows into the high-pressure generator 2 to absorb the biomass energy heat 1 from the biomass boiler system. In the high-pressure generator 2, the solution to be separated absorbs heat to become a first vapor absorption liquid of a first concentration. The first vapor absorption liquid of the first concentration flows back to the high-temperature heat exchanger 3 through a pipeline and exchanges heat with the solution to be separated present in the high-temperature heat exchanger 3. In the second branch, another part of the solution to be separated from the absorber 13 enters the low-temperature heat exchanger 12 for preliminary heat exchange through a solution pump, and then flows into the low-pressure generator 11 to absorb the heat from the geothermal water. In the low-pressure generator 11, the solution to be separated absorbs heat to become a first vapor absorption liquid of a second concentration. The first vapor absorption liquid of the second concentration flows back to the low-temperature heat exchanger 12 through a pipeline and exchanges heat with the solution to be separated present in the low-temperature heat exchanger 12. In the entire solvent circulation pipeline, the first vapor absorption liquid of the first concentration and the first vapor absorption liquid of the first concentration are fully mixed before flowing back to the absorber 13, so as to form a first vapor absorption liquid of a suitable concentration, which again absorbs the first vapor to become the solution to be separated and circulates in turn. In the solvent circulation pipeline, the first vapor absorption liquid of different concentrations is generated to ensure the absorption efficiency, heat utilization efficiency and stability of the absorption refrigeration system. This design enables the geothermal energy combined with biomass energy coupled dual-heat-source refrigeration and drying system to more effectively utilize different heat sources while maintaining high refrigeration performance. It can be known that the solution to be separated entering the high-pressure generator 2 will generate a certain amount of vapor under the heat generated by the biomass energy heat source 1. This part of the vapor can enter the low-pressure generator 11 as part of the refrigerant to absorb the geothermal energy and then flow to the condenser 15 to become low-temperature high-pressure water.

[0052] In an embodiment of the present application, the geothermal energy combined with biomass energy coupled dual-heat-source refrigeration and drying system further comprises a cooling circulation pipeline connected to the condenser 15 and the absorber 13 in a pipeline. The cooling circulation pipeline can absorb the heat generated in the absorber 13.

[0053] In the embodiment, the geothermal energy and biomass energy coupled dual-heat-source refrigeration and drying system further comprises a cooling circulation pipeline, which is in pipeline communication with the condenser 15 and the absorber 13. In the absorber 13, because the lithium bromide absorbs water vapor through an exothermic chemical reaction, the temperature of the absorber 13 continuously rises. Therefore, the cooling circulation pipeline is arranged to enable cooling water to enter the absorber 13 to absorb the released heat, so that the absorber 13 can operate safely.

[0054] In an embodiment of the present application, the cooling circulation pipeline comprises a cooling tower 20 and a cooling water pump 21, which are in pipeline communication in sequence. The cooling tower 20 is in pipeline communication with the condenser 15, and the cooling water pump 21 is in pipeline communication with the absorber 13.

[0055] In the embodiment, the cooling circulation pipeline comprises a cooling tower 20 and a cooling water pump 21, which are in pipeline communication in sequence. The cooling tower 20 is in pipeline communication with the condenser 15, and the cooling water pump 21 is in pipeline communication with the absorber 13. Specifically, the cooling water at 38 degrees Celsius condensed from the condenser 15 enters the cooling tower 20, and is further cooled to cooling water at 32 degrees Celsius under the cooling action of the cooling tower 20. The cooling water flows to the absorber 13 under the action of the cooling water pump 21, so as to absorb the heat generated by the lithium bromide in absorbing water vapor.

[0056] In an embodiment of the present application, the geothermal energy and biomass energy coupled dual-heat-source refrigeration and drying system further comprises a drying device 10. The low-pressure generator 11 is in pipeline communication with the drying device 10 to form a drying branch.

[0057] In the embodiment, in order to fully utilize the heat of the geothermal energy, the low-pressure generator 11 is in pipeline communication with the drying device 10. The water temperature of the geothermal water after heat exchange in the low-pressure generator 11 is controlled at 70 degrees Celsius. The geothermal water enters the drying device 10 through the pipeline of the drying branch to be dried, so as to realize the waste heat utilization of the geothermal water, thereby improving the thermal efficiency of the geothermal water heat source.

[0058] In an embodiment of the present application, the drying branch is provided with a biomass energy water supplement and pressure supplement branch, which is in pipeline communication with the low-pressure generator 11 and the biomass energy heat source 1.

[0059] In the embodiment, the biomass energy water supplement and pressure supplement branch is in pipeline communication with the low-pressure generator 11 and the biomass boiler system generating the biomass energy heat source 1. When the biomass boiler system lacks water or pressure, the biomass energy water supplement and pressure supplement branch can deliver the geothermal water at 70 degrees Celsius to the biomass boiler system to supplement water and pressure, so as to ensure the normal operation of the biomass boiler system.

[0060] In an embodiment of the present application, the drying branch is provided with a first electrically-controlled regulating valve 9, which is in communication with the drying device 10 and the low-pressure generator 11.

[0061] The biomass energy water supplementing and pressure supplementing branch is provided with a second electric regulating valve 8, which is arranged between the first electric regulating valve 9 and the low-pressure generator 11; the second electric regulating valve 8 is connected with the low-pressure generator 11 and the biomass energy heat source 1.

[0062] In the embodiment, the first electric regulating valve 9 is arranged in the drying branch, and the second electric regulating valve 8 is arranged in the biomass energy water supplementing and pressure supplementing branch, so that the opening degree of the corresponding electric regulating valve is set according to the information feedback of the drying device 10 and the biomass boiler system, the operation state of the drying device 10 and the biomass boiler system is better adjusted, and the safe operation of the equipment is ensured.

[0063] In an embodiment of the present application, a first flow regulating valve 5 and a second flow regulating valve 6 are arranged between the absorber 13 and the high-temperature heat exchanger 3; the first flow regulating valve 5 is used for regulating the flow of the to-be-decoupled solution flowing from the absorber 13 to the high-temperature heat exchanger 3; and the second flow regulating valve 6 is used for regulating the flow of the first vapor absorption liquid flowing from the high-temperature heat exchanger 3 to the absorber 13.

[0064] In the embodiment, the first flow regulating valve 5 is arranged on the pipeline from the absorber 13 to the high-temperature heat exchanger 3, and the second flow regulating valve 6 is arranged on the pipeline from the high-temperature heat exchanger 3 to the absorber 13, so as to control the flow of the to-be-decoupled solution and the flow of the first vapor absorption liquid of the first concentration; further, when the whole geothermal energy combined with biomass energy coupled dual-heat-source refrigeration drying system does not need to use the biomass energy heat source 1 (i.e., the user's cold load demand is small), the first flow regulating valve 5, the second flow regulating valve 6, the third flow regulating valve 7 and the second electric regulating valve 8 can be closed, so that the geothermal water is used as a single source to meet the cold demand, thereby reducing the power consumption; when the user's cold load demand is large, the geothermal water single source cannot meet the cold demand, that is, the biomass energy heat source 1 and the geothermal water heat source dual-heat-source mode are used to provide sufficient heat source for the refrigeration system, to ensure the refrigerant flow of the system and increase the refrigeration effect of the system; in this circulation mode, the first flow regulating valve 5, the second flow regulating valve 6, the third flow regulating valve 7 and the second electric regulating valve 8 are all opened.

[0065] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application; any equivalent structural transformation made according to the inventive concept of the present application and the content of the specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the present application.

Claims

1. A geothermal energy combined with biomass energy coupled dual heat source refrigeration drying system, characterized in that, The geothermal energy combined with biomass energy coupling dual heat source refrigeration drying system comprises: a heat source system, the heat source system comprises a biomass energy heat source (1) and a geothermal water heat source; a refrigeration cycle pipeline, the refrigeration cycle pipeline is in pipeline communication with the biomass energy heat source (1) and the geothermal water heat source; the refrigeration cycle pipeline is provided with an evaporator (17); and a chilled water external circulation pipeline, the chilled water external circulation pipeline is in communication with the evaporator (17); the evaporator (17) can absorb the heat of the medium to be cooled in the chilled water external circulation pipeline, can generate chilled water, and the chilled water external circulation pipeline transmits the chilled water for external refrigeration; the refrigeration cycle pipeline comprises a refrigeration sub-pipeline and a solvent circulation pipeline, the refrigeration sub-pipeline comprises a secondary pressure generator, a condenser (15) and the evaporator (17) which are in pipeline communication in sequence, the secondary pressure generator is in pipeline communication with the biomass energy heat source (1) and the geothermal water heat source, and the secondary pressure generator is provided with a refrigerant which flows to the evaporator (17) through a pipeline; the solvent circulation pipeline comprises an absorber (13) and a heat exchanger assembly which are in pipeline communication, the absorber (13) is in communication with the evaporator (17), and the heat exchanger assembly is in communication with the secondary pressure generator; wherein, the refrigerant absorbs the heat of the medium to be cooled in the evaporator (17), and is converted into a first vapor, the absorber (13) is provided with a first vapor absorption liquid, the first vapor absorption liquid can absorb the first vapor to become a solution to be separated, and the solution to be separated enters the secondary pressure generator through the heat exchanger assembly for heating; the secondary pressure generator comprises a high-pressure generator (2) and a low-pressure generator (11) which are in pipeline communication in sequence, the high-pressure generator (2) is in communication with the biomass energy heat source (1), and the low-pressure generator (11) is in communication with the geothermal water heat source and the condenser (15); and the heat exchanger assembly is in communication with the high-pressure generator (2) and the low-pressure generator (11) respectively; the heat exchanger assembly comprises a high-temperature heat exchanger (3) and a low-temperature heat exchanger (12); the high-temperature heat exchanger (3) is in pipeline communication with the high-pressure generator (2), and the low-temperature heat exchanger (12) is in pipeline communication with the low-pressure generator (11); the geothermal energy combined with biomass energy coupling dual heat source refrigeration drying system further comprises a drying device (10); the low-pressure generator (11) is in pipeline communication with the drying device (10) to form a drying branch; the drying branch is provided with a biomass energy water supplementing and pressure supplementing branch, and the biomass energy water supplementing and pressure supplementing branch is in pipeline communication with the low-pressure generator (11) and the biomass energy heat source (1).

2. The geothermal energy combined with biomass energy coupled binary source refrigeration drying system of claim 1, wherein, The geothermal energy combined with biomass energy coupling dual heat source refrigeration drying system further comprises a cooling circulation pipeline, the cooling circulation pipeline is in pipeline communication with the condenser (15) and the absorber (13); and the cooling circulation pipeline can absorb the heat generated in the absorber (13).

3. The geothermal energy combined with biomass energy coupled binary source refrigeration drying system of claim 2, wherein, The cooling circulation pipeline comprises a cooling tower (20) and a cooling water pump (21) connected in sequence, the cooling tower (20) is connected with the condenser (15) in pipeline, and the cooling water pump (21) is connected with the absorber (13) in pipeline.

4. The geothermal energy combined with biomass energy coupled binary source refrigeration drying system of claim 1, wherein, The dry branch is provided with a first electric regulating valve (9), the first electric regulating valve (9) is connected with the dry device (10) and the low-pressure generator (11); The biomass energy water supplementing and pressure supplementing branch is provided with a second electric regulating valve (8), the second electric regulating valve (8) is arranged between the first electric regulating valve (9) and the low-pressure generator (11); the second electric regulating valve (8) is connected with the low-pressure generator (11) and the biomass energy heat source (1).

5. The geothermal energy combined with biomass energy coupled binary source refrigeration drying system according to claim 1 or 4, characterized in that, The first flow regulating valve (5) and the second flow regulating valve (6) are arranged between the absorber (13) and the high-temperature heat exchanger (3), the first flow regulating valve (5) is used for regulating the flow of the to-be-separated solution of the absorber (13) flowing to the high-temperature heat exchanger (3), and the second flow regulating valve (6) is used for regulating the flow of the first vapor absorption liquid of the high-temperature heat exchanger (3) flowing to the absorber (13).

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