A geothermal and coal power unit coupled heat supply system and method

Abstract

The application belongs to the technical field of heat supply, and particularly relates to a geothermal and coal power unit coupled heat supply system and method, which comprises: a first heat exchange module, which is used for performing primary heat exchange on initial geothermal water and first user water through a first plate heat exchanger to obtain second geothermal water and first temperature exchange water; a second heat exchange module, which is used for performing heat exchange on the second heat exchange water and low-temperature output water through a second plate heat exchanger to obtain third geothermal water and second temperature exchange water; a medium-pressure cylinder, which is used for providing high-temperature steam as a high-temperature driving heat source according to an initial driving efficiency; an absorption heat pump, which is used for receiving the first temperature exchange water, the second temperature exchange water and the high-temperature driving heat source to perform heat conversion, monitoring a pump heat conversion efficiency to adjust the initial driving efficiency, and obtaining target output water for heat supply. The application improves the utilization rate of geothermal resources.

Description

Technical Field

[0001] This application belongs to the field of heating technology, and in particular relates to a heating system and method that couples geothermal energy and coal-fired power units. Background Technology

[0002] In traditional heating systems, coal-fired power units alone suffer from high energy consumption and large carbon emissions. Geothermal energy, as a clean energy source, is limited by its low temperature when used alone, making it difficult to directly meet the demand for high-quality heating. Existing geothermal and coal-fired power coupling systems mostly employ simple series heat exchange methods, which have the following drawbacks: Low utilization rate of geothermal resources: geothermal water is directly reinjected after only one heat exchange, and a large amount of medium and low temperature heat is not fully utilized; Poor energy consumption matching: The high-temperature steam output of coal-fired power units lacks intelligent coordination with the heat demand of geothermal low-grade heat sources, resulting in energy waste; Efficiency feedback lag: The heat conversion efficiency of the absorption heat pump is not linked in real time with the driving efficiency of the coal-fired power unit, resulting in low overall system energy efficiency. Summary of the Invention

[0003] To address the aforementioned issues, this application provides a heating system and method that couples geothermal energy with coal-fired power units. Employing multi-stage heat exchange and intelligent control technology, the system extracts geothermal energy in stages and dynamically matches the driving parameters of coal-fired power units, thereby improving the utilization rate of geothermal resources. Simultaneously, it effectively combines the waste heat from coal-fired power units, achieving cascaded utilization and efficient conversion of energy.

[0004] In a first aspect, this application provides a heating system coupled with geothermal energy and a coal-fired power unit, the system comprising, The first heat exchange module is used to exchange the initial geothermal water and the first user water through a primary plate heat exchanger to obtain the second geothermal water and the first temperature-exchanged water. The second heat exchange module is used to exchange heat between the second heat exchange water and the low-temperature output water through a two-stage plate heat exchanger to obtain the third geothermal water and the second heat exchange water; The intermediate-pressure cylinder is used to provide high-temperature steam as a high-temperature driving heat source according to the initial driving efficiency; An absorption heat pump is used to receive the first heat exchange water, the second heat exchange water, and the high-temperature driving heat source for heat conversion, monitor the pump's heat conversion efficiency to adjust the initial driving efficiency, and obtain the target output water for heating.

[0005] Furthermore, The first heat exchange module includes: The detection unit is used to detect the initial geothermal temperature corresponding to the initial geothermal water and the initial user temperature corresponding to the first user water. A heat exchange unit, connected to the detection unit, is used to compare the initial geothermal temperature with the initial user temperature to obtain a first temperature comparison result. Based on the first temperature comparison result, the initial heat exchange area of ​​the first-stage plate heat exchanger is adjusted to complete the heat exchange and obtain the second geothermal water and the first temperature-exchange water.

[0006] Furthermore, The heat exchange unit includes: A calculation subunit is used to calculate the temperature difference between the initial geothermal temperature and the initial user temperature; The comparison subunit is used to compare the temperature difference value with a preset temperature difference threshold group to obtain the difference comparison result; The adjustment subunit is used to match the heat exchange area adjustment strategy based on the difference comparison result, and control the initial heat exchange area to increase, maintain or decrease. The calibration subunit is used to calculate the actual heat exchange of the first-stage heat exchanger and compare it with a preset heat exchange threshold. Based on the heat exchange comparison result, the initial heat exchange area is corrected a second time.

[0007] Furthermore, The calibration subunit includes: The heat exchange calculation block is used to calculate the actual heat exchange based on the target temperature of the first heat exchange water and the initial temperature of the first user water. The comparison block, connected to the heat exchange calculation block, is used to compare the actual heat exchange with a preset heat exchange threshold. Based on the comparison result, a secondary calibration strategy for the heat exchange area is matched to correct the initial heat exchange area for the second time according to the secondary calibration strategy.

[0008] Furthermore, The absorption heat pump includes: The monitoring unit is used to monitor the pump input heat, high-temperature drive heat, and pump output heat in real time. An efficiency calculation unit, connected to the monitoring unit, is used to calculate the pump heat conversion efficiency based on the pump input heat, high-temperature driving heat, and pump output heat. An efficiency adjustment unit, connected to the efficiency calculation unit, is used to compare the pump heat conversion efficiency with a preset heat conversion efficiency threshold, and adjust the initial drive efficiency based on the comparison result, or adjust the working fluid solution concentration.

[0009] Furthermore, The efficiency adjustment unit includes: The threshold comparison subunit is used to compare the pump heat conversion efficiency with a preset heat conversion efficiency threshold range to obtain an efficiency comparison result; The efficiency adjustment subunit is used to send a signal to the intermediate pressure cylinder to increase the initial drive efficiency when the efficiency comparison result is that the pump heat conversion efficiency is less than the minimum value of the preset heat conversion efficiency threshold range, so as to increase the enthalpy of the high temperature steam; and to send a signal to decrease the initial drive efficiency when the efficiency comparison result is that the pump heat conversion efficiency is greater than the maximum value of the preset heat conversion efficiency threshold range, so as to decrease the enthalpy of the high temperature steam. The concentration adjustment subunit increases the lithium bromide solution concentration when the efficiency comparison result shows that the pump heat conversion efficiency is less than the minimum value of the preset heat conversion efficiency threshold range and the drive efficiency adjustment still fails to meet the standard.

[0010] Furthermore, The intermediate pressure cylinder includes: The steam generation unit is used to generate high-temperature steam based on the initial drive efficiency, which is positively correlated with the steam pressure. The signal receiving unit receives the efficiency adjustment signal sent by the absorption heat pump; The efficiency correction unit is used to increase the initial drive efficiency when a boost signal is received, and to decrease the efficiency when a debuff signal is received.

[0011] Secondly, based on the same inventive concept, this application provides a heating method coupling geothermal energy and coal-fired power units, the method comprising, The initial geothermal water and the first user's water are heat exchanged once through a primary plate heat exchanger to obtain the second geothermal water and the first exchanged water. Based on the heat exchange of the second hot water and the low-temperature output water through a two-stage plate heat exchanger, the third geothermal water and the second hot water are obtained; The intermediate-pressure cylinder provides high-temperature steam as a high-temperature driving heat source based on the initial driving efficiency. An absorption heat pump receives the first heat exchange water, the second heat exchange water, and the high-temperature driving heat source for heat conversion. It monitors the pump's heat conversion efficiency to adjust the initial driving efficiency and obtains the target output water for heating.

[0012] Furthermore, The initial geothermal water and the first user's return water undergo a primary heat exchange via a single-stage plate heat exchanger, specifically including: Detect the initial geothermal temperature corresponding to the initial geothermal water and the initial user temperature corresponding to the first user's return water; By comparing the initial geothermal temperature with the initial user temperature, a first temperature comparison result is obtained; The initial heat exchange area of ​​the first-stage plate heat exchanger is adjusted based on the first temperature comparison result to complete the heat exchange.

[0013] Furthermore, Adjusting the initial heat exchange area of ​​the first-stage plate heat exchanger based on the first temperature comparison result to complete heat exchange specifically includes: Calculate the temperature difference between the initial geothermal temperature and the initial user temperature; The temperature difference is compared with a preset temperature difference threshold group to obtain the difference comparison result; Based on the difference comparison result, a corresponding heat exchange area adjustment strategy is matched to control the initial heat exchange area to increase, maintain, or decrease. Calculate the actual heat exchange of the first-stage plate heat exchanger; The actual heat exchange is compared with a preset heat exchange threshold, and the heat exchange area is corrected a second time based on the comparison result.

[0014] Compared with the prior art, this application has the following advantages: 1. By employing a tiered heat exchange design in the first and second heat exchange modules, the initial geothermal water is extracted twice, changing the traditional system's single heat exchange before reinjecting the geothermal water. Combined with the precise temperature control of the two-stage plate heat exchanger, the temperature of the third geothermal water is accurately controlled, improving geothermal utilization and significantly unlocking the potential of geothermal energy.

[0015] 2. Both the first and second heat exchange modules can dynamically adjust the heat exchange area based on the temperature difference. Furthermore, the calibration subunit of the first heat exchange module corrects the area a second time based on the actual heat exchange volume, avoiding the limitations of adjusting solely based on the initial temperature difference. This dual adjustment mechanism ensures optimal heat exchange efficiency under different operating conditions, solving the problem of large fluctuations in heat exchange efficiency in traditional systems.

[0016] 3. The efficiency adjustment unit of the absorption heat pump is linked to the intermediate-pressure cylinder. When the pump's heat conversion efficiency deviates from the preset range, the initial driving efficiency of the intermediate-pressure cylinder can be adjusted in real time to change the enthalpy of the high-temperature steam. Simultaneously, the lithium bromide solution concentration can be adjusted to assist in optimization. This coordinated regulation makes the matching between the geothermal low-grade heat source and the coal-fired power-driven heat source more precise, avoiding energy waste.

[0017] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1A schematic diagram of a heating system coupled with geothermal and coal-fired power units is shown. Figure 2 A flowchart illustrating an example of a method for a geothermal and coal-fired power unit coupled heating system according to an embodiment of this application is shown. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Figure 1 A schematic diagram of a heating system coupling geothermal and coal-fired power units according to an embodiment of this application is shown, as follows: Figure 1 As shown in the embodiment of this application, a heating system coupling geothermal and coal-fired power units includes, The first heat exchange module 10 is used to exchange the initial geothermal water and the first user water through a primary plate heat exchanger to obtain the second geothermal water and the first temperature-exchanged water. The second heat exchange module 20 is used to exchange heat between the second heat exchange hot water and the low-temperature output water through a two-stage plate heat exchanger to obtain the third geothermal water and the second heat exchange water. The intermediate pressure cylinder 30 is used to provide high-temperature steam as a high-temperature driving heat source according to the initial driving efficiency; An absorption heat pump 40 is used to receive the first heat exchange water, the second heat exchange water and the high-temperature driving heat source, perform heat conversion, monitor the pump heat conversion efficiency to adjust the initial driving efficiency, and obtain the target output water for heating.

[0022] In this embodiment of the application, the first heat exchange module 10 includes: The detection unit 11 is used to detect the initial geothermal temperature corresponding to the initial geothermal water and the initial user temperature corresponding to the first user water. The heat exchange unit 12 is connected to the detection unit 11 and is used to compare the initial geothermal temperature with the initial user temperature to obtain a first temperature comparison result. Based on the first temperature comparison result, the initial heat exchange area of ​​the first-stage plate heat exchanger is adjusted to complete the heat exchange and obtain the second geothermal water and the first temperature exchange water.

[0023] In this embodiment of the application, the heat exchange unit 12 includes: The calculation subunit 121 is used to calculate the temperature difference between the initial geothermal temperature and the initial user temperature; Comparison subunit 122 is used to compare the temperature difference value with a preset temperature difference threshold group to obtain the difference comparison result; Adjustment subunit 123 is used to match the heat exchange area adjustment strategy based on the difference comparison result, and control the initial heat exchange area to increase, maintain or decrease. The calibration subunit is used to calculate the actual heat exchange of the first-stage heat exchanger and compare it with a preset heat exchange threshold. Based on the heat exchange comparison result, the initial heat exchange area is corrected a second time.

[0024] In this embodiment, the preset temperature difference threshold group is simulated by CFD (Computational Fluid Dynamics) to determine the heat exchange efficiency under different plate heat exchanger areas and different temperature differences (such as NTU-ε method calculation). Combined with equipment energy consumption (pump power consumption, plate heat exchanger resistance loss), the critical temperature difference where "heat exchange benefit > energy consumption increase" is found and used as the threshold basis.

[0025] Closed-loop regulation: Avoiding the limitations of adjusting solely based on the initial temperature difference (such as fluctuations in geothermal water flow and changes in user water flow), by real-time monitoring of heat exchange and adjusting the heat exchange area, the stability and energy efficiency of primary heat exchange are ensured.

[0026] In this embodiment of the application, one example of the heat exchange unit may be: The preset temperature difference range includes a first threshold interval [ΔT]. min1 ,ΔT max1 (e.g., 5℃≤ΔT≤15℃, suitable for scenarios with temperature differences between conventional geothermal water and user water), second threshold range [ΔT] min2 ,ΔT min1） (e.g., 0℃≤ΔT≤5℃, corresponding to a small temperature difference scenario) and the third threshold interval (ΔT) max1 ,ΔT max2 (e.g., 15℃≤ΔT≤30℃, corresponding to a large temperature difference scenario); The heat exchange area adjustment strategy is specifically as follows: If the temperature difference falls within the first threshold range, the initial heat exchange area is maintained. If the temperature difference value falls within the second threshold range, then according to formula A new =A init ×(1-k1×(ΔT min1 -ΔT) / ΔT min1 Reduce the heat transfer area, where A init Let A be the initial heat transfer area, and k1 be a correction coefficient with a value of 0.2-0.5. Through experimental fitting, A... new This refers to the adjusted heat exchange area; If the temperature difference falls within the third threshold range, then proceed according to formula A. new =A init ×1+k2×(ΔT-ΔTmax1 ) / (ΔT) max2 -ΔT max1 Increase the heat transfer area. In the formula, k2 is a correction coefficient, with a value of 0.3-0.6. Through experimental fitting, A init For the initial heat exchange area, A new This refers to the adjusted heat exchange area.

[0027] In this embodiment of the application, the calibration subunit includes: The heat exchange calculation block is used to calculate the actual heat exchange based on the target temperature of the first heat exchange water and the initial temperature of the first user water. The comparison block, connected to the heat exchange calculation block, is used to compare the actual heat exchange with a preset heat exchange threshold. Based on the comparison result, a secondary calibration strategy for the heat exchange area is matched to correct the initial heat exchange area for the second time according to the secondary calibration strategy.

[0028] In this embodiment, the formula for calculating the actual heat exchange by the calibration subunit is: Q actual =c×m user1 ×(T user1－out -T user1） Where c is the specific heat capacity of water (4.18 J / (g·°C) or 4186 J / (kg·°C) at normal temperature and pressure (25°C), usually approximated as 4.2 J / (g·°C)), m user1 For the first user's water mass flow rate (kg / s), T user1－out The target temperature of the first heat exchange water at the outlet of the primary heat exchanger is T. user1 The initial user temperature of the water for the first user; The preset heat exchange threshold includes a lower limit threshold Q. min =m user1 ×c×ΔT target1 and upper limit threshold Q max =m user1 ×c×ΔT target2， In the formula, ΔT target1 To achieve the target minimum temperature rise, ΔT target2 The target maximum temperature rise is determined by the system design heat load; If Q actual min The calibration subunit is configured according to ΔA = k3 × (Q). min -Q actual ) / Q min ×A current Increase the heat exchange area, where k3 is the calibration coefficient, taken as 0.1-0.3; if Q actual Q max Then, according to ΔA=k4×(Q) actual -Q​max ) / Q max ×A current Reduce the heat exchange area, where k4 is the calibration coefficient, which is taken as 0.05-0.2.

[0029] In this embodiment of the application, the absorption heat pump includes: The monitoring unit is used to monitor the pump input heat, high-temperature drive heat, and pump output heat in real time. An efficiency calculation unit, connected to the monitoring unit, is used to calculate the pump heat conversion efficiency based on the pump input heat, high-temperature driving heat, and pump output heat. An efficiency adjustment unit, connected to the efficiency calculation unit, is used to compare the pump heat conversion efficiency with a preset heat conversion efficiency threshold, and adjust the initial drive efficiency based on the comparison result, or adjust the working fluid solution concentration.

[0030] In this embodiment of the application, the input heat is Q. low =c×m1×(T1-T0)+c×m2×(T2-T 0） In the formula, m1 is the first temperature exchange water flow rate, m2 is the second temperature exchange water flow rate, T1 is the input temperature of the first temperature exchange water, and T2 is the input temperature of the second temperature exchange water. The heat source driving the heat is Q drive =m steam ×(h drive -h cond） In the formula, h drive The enthalpy of the high-temperature steam provided to the intermediate-pressure cylinder, hcond is the enthalpy of the condensate, and msteam is the steam flow rate; The output heat is Q out =c×m target ×(T target -T target_in） In the formula, m target T is the pump output water flow rate. target T represents the target output water temperature of the absorption heat pump. target_in The initial temperature of the target output water to be heated before entering the absorption heat pump; The heat conversion efficiency is η=Q out / (Q) low +Q drive ).

[0031] In this embodiment, the absorption heat pump includes a generator, a condenser, an evaporator, an absorber, a solution pump, and a throttling valve, and uses lithium bromide-water as the working fluid pair, wherein: The generator receives high-temperature steam to heat a dilute lithium bromide solution, producing refrigerant vapor; The condenser receives refrigerant vapor, condenses it to release heat, and heats the target output water. The evaporator receives heat from the first and second heat exchange water, causing the throttled refrigerant liquid to evaporate into vapor; The absorber receives the refrigerant vapor generated by the evaporator, absorbs it through a concentrated lithium bromide solution to form a dilute solution, and then returns the dilute solution to the generator after being pressurized by a solution pump to complete the cycle.

[0032] In this embodiment of the application, the efficiency adjustment unit includes: The threshold comparison subunit is used to compare the pump heat conversion efficiency with a preset heat conversion efficiency threshold range to obtain an efficiency comparison result; The efficiency adjustment subunit is used to send a signal to the intermediate pressure cylinder to increase the initial drive efficiency when the efficiency comparison result is that the pump heat conversion efficiency is less than the minimum value of the preset heat conversion efficiency threshold range, so as to increase the enthalpy of the high temperature steam; and to send a signal to decrease the initial drive efficiency when the efficiency comparison result is that the pump heat conversion efficiency is greater than the maximum value of the preset heat conversion efficiency threshold range, so as to decrease the enthalpy of the high temperature steam. The concentration adjustment subunit increases the lithium bromide solution concentration when the efficiency comparison result shows that the pump heat conversion efficiency is less than the minimum value of the preset heat conversion efficiency threshold range and the drive efficiency adjustment still fails to meet the standard.

[0033] In this embodiment of the application, the intermediate pressure cylinder includes: The steam generation unit is used to generate high-temperature steam based on the initial drive efficiency, which is positively correlated with the steam pressure. The signal receiving unit receives the efficiency adjustment signal sent by the absorption heat pump; The efficiency correction unit is used to increase the initial drive efficiency when a boost signal is received, and to decrease the efficiency when a debuff signal is received.

[0034] Based on the same inventive concept, embodiments of this application also provide a heating method coupling geothermal energy and coal-fired power units, the method comprising, The initial geothermal water and the first user's water are heat exchanged once through a primary plate heat exchanger to obtain the second geothermal water and the first exchanged water. Based on the heat exchange of the second hot water and the low-temperature output water through a two-stage plate heat exchanger, the third geothermal water and the second hot water are obtained; The intermediate-pressure cylinder provides high-temperature steam as a high-temperature driving heat source based on the initial driving efficiency. An absorption heat pump receives the first heat exchange water, the second heat exchange water, and the high-temperature driving heat source for heat conversion. It monitors the pump's heat conversion efficiency to adjust the initial driving efficiency and obtains the target output water for heating.

[0035] In this embodiment of the application, the initial geothermal water and the first user's return water undergo a primary heat exchange via a single-stage plate heat exchanger, specifically including: Detect the initial geothermal temperature corresponding to the initial geothermal water and the initial user temperature corresponding to the first user's return water; By comparing the initial geothermal temperature with the initial user temperature, a first temperature comparison result is obtained; The initial heat exchange area of ​​the first-stage plate heat exchanger is adjusted based on the first temperature comparison result to complete the heat exchange.

[0036] In this embodiment of the application, adjusting the initial heat exchange area of ​​the first-stage plate heat exchanger based on the first temperature comparison result to complete the heat exchange specifically includes: Calculate the temperature difference between the initial geothermal temperature and the initial user temperature; The temperature difference is compared with a preset temperature difference threshold group to obtain the difference comparison result; Based on the difference comparison result, a corresponding heat exchange area adjustment strategy is matched to control the initial heat exchange area to increase, maintain, or decrease. Calculate the actual heat exchange of the first-stage plate heat exchanger; The actual heat exchange is compared with a preset heat exchange threshold, and the heat exchange area is corrected a second time based on the comparison result.

[0037] Figure 2 A flowchart illustrating an example of a method for a geothermal and coal-fired power unit coupled heating system according to an embodiment of this application is shown. See also: Figure 2It can be seen that it includes geothermal water circulation (red path), user-side water circulation (blue path), and coal-electricity coupling (orange path). The geothermal water circulation process involves extracting 65℃ geothermal water (flow rate 273.72, enthalpy 167.1, subsequent parameters are similar) from the extraction well as an initial heat source. This extracted geothermal water undergoes impurity and scale removal to ensure system equipment operation. The geothermal water undergoes initial heat exchange with user-side water through a primary heat exchanger, reducing its temperature from 65℃ to 48℃. The geothermal water then undergoes secondary heat exchange through a secondary heat exchanger, reducing its temperature from 48℃ to 25℃, further recovering residual heat. Afterward, it is discharged to the reinjection well, completing the geothermal circulation. The user-side water circulation process involves user-side return water being heated to 55℃ by the geothermal water through a primary heat exchanger. The water (flow rate 231.93) enters the absorption heat pump. Inside the heat pump, the 55°C user water exchanges energy with the 200°C steam (flow rate 2859.93, enthalpy 320.1) provided by the medium-pressure cylinder of the coal-fired power plant, raising its temperature to 90°C (flow rate 378.43). Part of the 90°C hot water is sent to the first station of the heating network for heating, while the other part (flow rate 377.19) goes to the deaerator. The 22°C water output from the absorption heat pump is heated to 45°C through a two-stage plate heat exchanger and returns to the absorption heat pump, forming a cycle. The medium-pressure cylinder, as part of the coal-fired power unit, provides 200°C high-temperature steam (driving heat source), which enters the absorption heat pump to do work, helping to raise the user water temperature to 90°C, realizing "geothermal + coal-fired power" synergistic heating and improving energy utilization efficiency.

[0038] Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A heating system coupling geothermal energy and a coal-fired power unit, characterized in that, The system includes, The first heat exchange module is used to exchange the initial geothermal water and the first user water through a primary plate heat exchanger to obtain the second geothermal water and the first temperature-exchanged water. The second heat exchange module is used to exchange heat between the second heat exchange water and the low-temperature output water through a two-stage plate heat exchanger to obtain the third geothermal water and the second heat exchange water; The intermediate-pressure cylinder is used to provide high-temperature steam as a high-temperature driving heat source according to the initial driving efficiency; An absorption heat pump is used to receive the first heat exchange water, the second heat exchange water, and the high-temperature driving heat source for heat conversion, monitor the pump's heat conversion efficiency to adjust the initial driving efficiency, and obtain the target output water for heating.

2. The system according to claim 1, characterized in that, The first heat exchange module includes: The detection unit is used to detect the initial geothermal temperature corresponding to the initial geothermal water and the initial user temperature corresponding to the first user water. A heat exchange unit, connected to the detection unit, is used to compare the initial geothermal temperature with the initial user temperature to obtain a first temperature comparison result. Based on the first temperature comparison result, the initial heat exchange area of ​​the first-stage plate heat exchanger is adjusted to complete the heat exchange and obtain the second geothermal water and the first temperature-exchange water.

3. The system according to claim 2, characterized in that, The heat exchange unit includes: A calculation subunit is used to calculate the temperature difference between the initial geothermal temperature and the initial user temperature; The comparison subunit is used to compare the temperature difference value with a preset temperature difference threshold group to obtain the difference comparison result; The adjustment subunit is used to match the heat exchange area adjustment strategy based on the difference comparison result, and control the initial heat exchange area to increase, maintain or decrease. The calibration subunit is used to calculate the actual heat exchange of the first-stage heat exchanger and compare it with a preset heat exchange threshold. Based on the heat exchange comparison result, the initial heat exchange area is corrected a second time.

4. The system according to claim 3, characterized in that, The calibration subunit includes: The heat exchange calculation block is used to calculate the actual heat exchange based on the target temperature of the first heat exchange water and the initial temperature of the first user water. The comparison block, connected to the heat exchange calculation block, is used to compare the actual heat exchange with a preset heat exchange threshold. Based on the comparison result, a secondary calibration strategy for the heat exchange area is matched to correct the initial heat exchange area for the second time according to the secondary calibration strategy.

5. The system according to claim 4, characterized in that, The absorption heat pump includes: The monitoring unit is used to monitor the pump input heat, high-temperature drive heat, and pump output heat in real time. An efficiency calculation unit, connected to the monitoring unit, is used to calculate the pump heat conversion efficiency based on the pump input heat, high-temperature driving heat, and pump output heat. An efficiency adjustment unit, connected to the efficiency calculation unit, is used to compare the pump heat conversion efficiency with a preset heat conversion efficiency threshold, and adjust the initial drive efficiency based on the comparison result, or adjust the working fluid solution concentration.

6. The system according to claim 5, characterized in that, The efficiency adjustment unit includes: The threshold comparison subunit is used to compare the pump heat conversion efficiency with a preset heat conversion efficiency threshold range to obtain an efficiency comparison result; The efficiency adjustment subunit is used to send a signal to the intermediate pressure cylinder to increase the initial drive efficiency when the efficiency comparison result is that the pump heat conversion efficiency is less than the minimum value of the preset heat conversion efficiency threshold range, so as to increase the enthalpy of the high temperature steam; and to send a signal to decrease the initial drive efficiency when the efficiency comparison result is that the pump heat conversion efficiency is greater than the maximum value of the preset heat conversion efficiency threshold range, so as to decrease the enthalpy of the high temperature steam. The concentration adjustment subunit increases the lithium bromide solution concentration when the efficiency comparison result shows that the pump heat conversion efficiency is less than the minimum value of the preset heat conversion efficiency threshold range and the drive efficiency adjustment still fails to meet the standard.

7. The system according to claim 6, characterized in that, The intermediate pressure cylinder includes: The steam generation unit is used to generate high-temperature steam based on the initial drive efficiency, which is positively correlated with the steam pressure. The signal receiving unit receives the efficiency adjustment signal sent by the absorption heat pump; The efficiency correction unit is used to increase the initial drive efficiency when a boost signal is received, and to decrease the efficiency when a debuff signal is received.

8. A heating method coupling geothermal energy and coal-fired power units, characterized in that, The method includes, The initial geothermal water and the first user's water are heat exchanged once through a primary plate heat exchanger to obtain the second geothermal water and the first heat exchanged water; Based on the heat exchange of the second hot water and the low-temperature output water through a two-stage plate heat exchanger, the third geothermal water and the second hot water are obtained; The intermediate-pressure cylinder provides high-temperature steam as a high-temperature driving heat source based on the initial driving efficiency. An absorption heat pump receives the first heat exchange water, the second heat exchange water, and the high-temperature driving heat source for heat conversion. It monitors the pump's heat conversion efficiency to adjust the initial driving efficiency and obtains the target output water for heating.

9. The method according to claim 8, characterized in that, The initial geothermal water and the first user's return water undergo a primary heat exchange via a plate heat exchanger, specifically including: Detect the initial geothermal temperature corresponding to the initial geothermal water and the initial user temperature corresponding to the first user's return water; By comparing the initial geothermal temperature with the initial user temperature, a first temperature comparison result is obtained; The initial heat exchange area of ​​the first-stage plate heat exchanger is adjusted based on the first temperature comparison result to complete the heat exchange.

10. The method according to claim 9, characterized in that, Adjusting the initial heat exchange area of ​​the first-stage plate heat exchanger based on the first temperature comparison result to complete heat exchange specifically includes: Calculate the temperature difference between the initial geothermal temperature and the initial user temperature; The temperature difference is compared with a preset temperature difference threshold group to obtain the difference comparison result; Based on the difference comparison result, a corresponding heat exchange area adjustment strategy is matched to control the initial heat exchange area to increase, maintain, or decrease. Calculate the actual heat exchange of the first-stage plate heat exchanger; The actual heat exchange is compared with a preset heat exchange threshold, and the heat exchange area is corrected a second time based on the comparison result.

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