A large-temperature-difference heat exchanger unit of regenerative type

Abstract

The application discloses a supplementary combustion type large-temperature-difference heat exchange unit and relates to the technical field of heat supply equipment. The supplementary combustion unit comprises a supplementary combustion generator, a first generator, a first condenser, a first low-pressure absorber, a first low-pressure evaporator, a first high-pressure absorber and a first high-pressure evaporator. A primary network water inlet is connected in communication with a primary network water outlet in sequence through the first generator, the large-temperature-difference heat exchange unit, the first high-pressure evaporator and the first low-pressure evaporator. Secondary network water branch pipes are connected in communication with a secondary network water outlet through the first condenser after passing through the first low-pressure absorber and the first high-pressure absorber. In the application, the supplementary combustion unit can still work together with the large-temperature-difference heat exchange unit to convert the temperature of the primary network water into the secondary network water even when the combustion part in the supplementary combustion generator is not used, the utilization rate of the equipment can be improved, and the heat exchange effect can be improved.

Description

Technical Field

[0001] This invention relates to the field of heating equipment technology, and in particular to a supplementary combustion type large temperature difference heat exchanger unit. Background Technology

[0002] With urban development and the increasing size of buildings, especially with the completion of heating networks in older cities, and to meet the expansion needs of existing networks while simultaneously addressing the shortage and rising prices of coal and natural gas, major cities are increasingly adopting lithium bromide absorption heat exchangers with large temperature difference (TTE) to solve urban heating problems, making full use of waste heat from power plants. Therefore, TTE has become a trend in the heating industry. However, during periods of severe cold or extreme weather, TTE systems may experience insufficient heat source and inadequate hot water outlet temperature. To meet the demands of the heating market, supplementary combustion TTE systems have been introduced.

[0003] The conventional combustion-type large temperature difference heat exchanger consists of two parts (please refer to the appendix). Figure 1 The system consists of a large temperature difference heat exchanger unit and a combustion unit. The large temperature difference heat exchanger unit mainly includes a generator, condenser, low-pressure absorber, low-pressure evaporator, high-pressure absorber, high-pressure evaporator, water-to-water heat exchanger, solution pump, refrigerant pump, and solution heat exchanger. The combustion unit mainly includes a combustion generator, condenser, evaporator, absorber, solution pump, refrigerant pump, and solution heat exchanger. In conventional combustion-type large temperature difference heat exchanger units, the primary water path is: generator, water-to-water plate heat exchanger, high-pressure evaporator, low-pressure evaporator, and evaporator (combustion section). The secondary water path is divided into three lines entering the unit: line 1: high-pressure absorber, low-pressure absorber, condenser, and outlet; line 2: water-to-water plate heat exchanger and outlet. The system consists of three water lines: absorber, condenser, and outlet. The three water lines converge at the outlet and flow into one. When the unit is operating as a large temperature difference unit, the primary water flow pattern is the same as that of a supplementary combustion large temperature difference unit. However, the secondary water flow pattern is different. The secondary water line is closed, while the other two lines flow normally. When only the large temperature difference heat exchanger is used, the supplementary combustion unit is shut down. During the 120-day heating season and the 30-day cold season, only the large temperature difference heat exchanger is used, while the supplementary combustion unit is shut down. This results in very low utilization of the supplementary combustion unit, failing to achieve its intended efficiency. Furthermore, the cost of using natural gas is very high, leading many heating companies to avoid using the supplementary combustion unit whenever possible.

[0004] Therefore, there is an urgent need for a combustion-type large temperature difference heat exchanger unit with high equipment utilization and good heat exchange effect. Summary of the Invention

[0005] The purpose of this invention is to provide a supplementary combustion type large temperature difference heat exchanger unit to solve the problems existing in the prior art. When the supplementary combustion function is not used, only the combustion part of the supplementary combustion generator does not work, while the rest of the part is still in working state, thereby improving the equipment utilization rate and increasing the heat exchange area and improving the heat exchange effect.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a combustion-type large temperature difference heat exchange unit, including a large temperature difference heat exchange unit and a combustion unit. The combustion unit includes a combustion generator, a first generator, a first condenser, a first low-pressure absorber, a first low-pressure evaporator, a first high-pressure absorber, and a first high-pressure evaporator. The primary network water inlet sequentially passes through the first generator, the large temperature difference heat exchange unit, the first high-pressure evaporator, and the first low-pressure evaporator and is connected to the primary network water outlet. The secondary network water main pipeline is connected to the secondary network water outlet through the large temperature difference heat exchange unit. The secondary network water branch pipelines respectively pass through the first low-pressure absorber... After the first high-pressure absorber, it is connected to the secondary network water outlet through the first condenser. The outlet of the first solution chamber for holding lithium bromide solution is connected to the inlet of the first solution chamber through the first generator, the combustion generator, the first low-pressure absorber, and the first high-pressure absorber in sequence. The steam passage outlet of the combustion generator is set to correspond to the first condenser. The space below the first condenser, the first low-pressure evaporator, and the first high-pressure evaporator is connected to the inlet of the first refrigerant water circulation passage. The outlet of the first refrigerant water circulation passage is set to correspond to the first low-pressure evaporator and the first high-pressure evaporator.

[0007] Preferably, the first generator and the first condenser are disposed in the same cavity, the first low-pressure absorber and the first low-pressure evaporator are disposed in the same cavity, and the first high-pressure absorber and the first high-pressure evaporator are disposed in the same cavity.

[0008] Preferably, anti-splash plates are provided between the first generator and the first condenser, between the first low-pressure absorber and the first low-pressure evaporator, and between the first high-pressure absorber and the first high-pressure evaporator, and the anti-splash plates are provided with gas passages for steam to pass through.

[0009] Preferably, the first solution chamber is integrally formed with the cavity of the first high-pressure evaporator, and the first solution chamber is located at the bottom of the cavity.

[0010] Preferably, the first refrigerant water circulation path includes a water circulation pipe, a refrigerant pump installed on the water circulation pipe, and a spray section. The spray section is located at the end of the water circulation pipe and is installed corresponding to the first low-pressure evaporator and the first high-pressure evaporator. A water tray is installed in the space below the first low-pressure evaporator and the first high-pressure evaporator. The outlet of the water tray is connected to the inlet of the water circulation pipe.

[0011] Preferably, branch pipes are provided in the water circulation pipes corresponding to the positions of the first low-pressure evaporator and the first high-pressure evaporator, and the space below the first condenser is connected to the branch pipes of the water circulation pipes corresponding to the first high-pressure evaporator through pipes.

[0012] Preferably, the first solution chamber is connected to the inlet of the first generator via a solution pump.

[0013] Preferably, a solution heat exchanger is provided between the solution pump and the first generator, the pipeline of the solution pump is connected to the cold medium channel in the solution heat exchanger, and the solution output pipeline of the afterburner is connected to the hot medium channel in the solution heat exchanger.

[0014] Preferably, the large temperature difference heat exchange unit includes a second generator, a second condenser, a second low-pressure absorber, a second low-pressure evaporator, a second high-pressure absorber, and a second high-pressure evaporator. The outlet of the first generator is connected to the inlet of the first high-pressure evaporator via the second generator, the second high-pressure evaporator, and the second low-pressure evaporator in sequence. The secondary network water main pipeline is connected to the secondary network water outlet via the second high-pressure absorber and the second low-pressure absorber, respectively, and then via the second condenser. The outlet of the second solution chamber for holding lithium bromide solution is connected to the second generator, the second low-pressure absorber, and the second high-pressure evaporator in sequence. The second high-pressure absorber is connected to the inlet of the second solution chamber. The space below the second condenser, the second low-pressure evaporator, and the second high-pressure evaporator is connected to the inlet of the second refrigerant water circulation passage. The outlet of the second refrigerant water circulation passage is set corresponding to the second low-pressure evaporator and the second high-pressure evaporator. The arrangement of the second generator, the second condenser, the second low-pressure absorber, the second low-pressure evaporator, the second high-pressure absorber, the second high-pressure evaporator, the second solution chamber, and the second refrigerant water circulation passage is the same as the arrangement of the corresponding components in the combustion unit.

[0015] Preferably, the large temperature difference heat exchange unit further includes a water-to-water heat exchanger, which is disposed between the second generator and the second high-pressure evaporator. The pipeline between the second generator and the second high-pressure evaporator is connected to the heat medium channel of the water-to-water heat exchanger. A branch pipeline connected to the cold medium channel of the water-to-water heat exchanger is provided at the secondary network water inlet, and the end of the branch pipeline connected to the water-to-water heat exchanger is connected to the secondary network water outlet.

[0016] The present invention achieves the following main technical effects compared to the prior art:

[0017] By adding a first generator to the combustion unit and improving the water inlet path of the primary network water, the combustion unit can still work with the large temperature difference heat exchange unit to transfer the temperature of the primary network water to the secondary network water even when the combustion part in the combustion generator is not in use. The first generator, first condenser, first low-pressure absorber, first low-pressure evaporator, first high-pressure absorber, and first high-pressure evaporator in the combustion unit are all in working condition, which not only improves the utilization rate of the equipment, but also increases the heat exchange area in conjunction with the large temperature difference heat exchange unit, thereby improving the heat exchange effect on the primary and secondary network water. 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 embodiments 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 a schematic diagram of a conventional combustion-type large temperature difference heat exchanger unit.

[0020] Figure 2 This is a schematic diagram of the combustion-type large temperature difference heat exchanger unit of the present invention;

[0021] The components are as follows: 1. Large temperature difference heat exchange unit; 2. Afterburner unit; 3. Afterburner generator; 4. Condenser; 5. Evaporator; 6. Absorber; 7. Generator; 8. Water-to-water heat exchanger; 9. Solution pump; 10. Refrigerant pump; 11. Solution heat exchanger; 12. Low-pressure absorber; 13. Low-pressure evaporator; 14. High-pressure absorber; 15. High-pressure evaporator; 16. First generator; 17. First condenser; 18. First low-pressure absorber; 19. First low-pressure evaporator; 20. First high-pressure absorber; 21. First high-pressure evaporator; 22. Second generator; 23. Second condenser; 24. Second low-pressure absorber; 25. Second low-pressure evaporator; 26. Second high-pressure absorber; 27. Second high-pressure evaporator; 28. Primary network water inlet; 29. ​​Primary network water outlet; 30. Secondary network water inlet; 31. Secondary network water outlet. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] The purpose of this invention is to provide a supplementary combustion type large temperature difference heat exchanger unit to solve the problems existing in the prior art. When the supplementary combustion function is not used, only the combustion part of the supplementary combustion generator does not work, while the rest of the part is still in working state, thereby improving the equipment utilization rate and increasing the heat exchange area and improving the heat exchange effect.

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Please refer to the following: Figure 2As shown, a combustion-type large temperature difference heat exchanger unit is provided, including a large temperature difference heat exchange unit 1 and a combustion-supplement unit 2. The combustion-supplement unit 2 includes a combustion generator 3, a first generator 16, a first condenser 17, a first low-pressure absorber 18, a first low-pressure evaporator 19, a first high-pressure absorber 20, and a first high-pressure evaporator 21. The primary network water inlet 28 sequentially passes through the first generator 16, the large temperature difference heat exchange unit 1, the first high-pressure evaporator 21, and the first low-pressure evaporator 19 and is connected to the primary network water outlet 29. The secondary network... The main water pipe is connected to the secondary network water outlet 31 via the large temperature difference heat exchange unit 1. The secondary network water branch pipes pass through the first low-pressure absorber 18 and the first high-pressure absorber 20 respectively, and then connect to the secondary network water outlet 31 via the first condenser 17. The outlet of the first solution chamber, which holds the lithium bromide solution, passes through the first generator 16, the afterburner 3, the first low-pressure absorber 18, and the first high-pressure absorber 20 in sequence, and is connected to the inlet of the first solution chamber. A conveying system can be installed between the first generator 16 and the afterburner 3. The pump delivers lithium bromide solution. The steam passage outlet of the combustion generator 3 is set to correspond to the first condenser 17. The space below the first condenser 17, the first low-pressure evaporator 19, and the first high-pressure evaporator 21 are all connected to the inlet of the first refrigerant water circulation passage. The outlet of the first refrigerant water circulation passage is set to correspond to the first low-pressure evaporator 19 and the first high-pressure evaporator 21. By adding a first generator 16 in the combustion unit 2 and improving the water inlet path of the primary network water, even when the combustion part in the combustion generator 3 is not in use, the combustion unit 2 can still work with the large temperature difference heat exchange unit 1 to complete the work of converting the temperature of the primary network water to that of the secondary network water. The first generator 16, the first condenser 17, the first low-pressure absorber 18, the first low-pressure evaporator 19, the first high-pressure absorber 20, and the first high-pressure evaporator 21 in the combustion unit 2 are all in working condition. This not only improves the utilization rate of the equipment, but also increases the heat exchange area in conjunction with the large temperature difference heat exchange unit 1, thereby improving the heat exchange effect on the primary and secondary network water.

[0026] Anti-splash plates are provided between the first generator 16 and the first condenser 17, between the first low-pressure absorber 18 and the first low-pressure evaporator 19, and between the first high-pressure absorber 20 and the first high-pressure evaporator 21. The anti-splash plates are provided with gas passages for steam to pass through. The specific structure of the anti-splash plates can be as follows: several inverted V-shaped strip plates are arranged at intervals from top to bottom, and the ends of several strip plates in the length direction are connected by vertical support rods. The gaps between adjacent strip plates are the gas passages for steam to pass through. Alternatively, several gas ports can be directly provided on the anti-splash plates as gas passages, and a downwardly angled baffle can be provided above the gas ports as a shield to block the splashes. Or other structures can be used to achieve gas flow on both sides while preventing splashing.

[0027] To save costs, the first solution chamber is integrated with the cavity of the first high-pressure evaporator 21. The first solution chamber is located at the bottom of the cavity, that is, the bottom of the cavity where the first high-pressure absorber 20 and the first high-pressure evaporator 21 are located is used as the first solution chamber.

[0028] The first refrigerant water circulation path includes a water circulation pipe, a refrigerant pump 10 installed on the water circulation pipe, and a spray section. The spray section is located at the end of the water circulation pipe and is installed corresponding to the first low-pressure evaporator 19 and the first high-pressure evaporator 21. A water tray is installed in the space below the first low-pressure evaporator 19 and the first high-pressure evaporator 21 to receive the spray liquid. The outlet of the water tray is connected to the inlet of the water circulation pipe. The spray section can be a square structure or a disc structure, etc., and is hollow inside to receive refrigerant water. Several spray heads are evenly arranged at its bottom. The spray heads receive the internal refrigerant water and spray it.

[0029] Branch pipes are provided at the locations of the water circulation pipes corresponding to the first low-pressure evaporator 19 and the first high-pressure evaporator 21. The space below the first condenser 17 is connected to the branch pipes of the water circulation pipes corresponding to the first high-pressure evaporator 21 through pipes.

[0030] The first solution chamber is connected to the inlet of the first generator 16 via a solution pump 9, which provides energy for the delivery of the lithium bromide solution.

[0031] A solution heat exchanger 11 is provided between the solution pump 9 and the first generator 16. The pipeline where the solution pump 9 is located is connected to the cold medium channel in the solution heat exchanger 11. The solution output pipeline of the combustion generator 3 is connected to the heat medium channel in the solution heat exchanger 11.

[0032] The large temperature difference heat exchange unit 1 includes a second generator 22, a second condenser 23, a second low-pressure absorber 24, a second low-pressure evaporator 25, a second high-pressure absorber 26, and a second high-pressure evaporator 27. The outlet of the first generator 16 is connected to the inlet of the first high-pressure evaporator 21 via the second generator 22, the second high-pressure evaporator 27, and the second low-pressure evaporator 25 in sequence. The secondary network water main pipeline is connected to the secondary network water outlet 31 via the second high-pressure absorber 26 and the second low-pressure absorber 24, and then via the second condenser 23. The outlet of the second solution chamber, which holds the lithium bromide solution, is connected to the second generator 22, the second low-pressure absorber 24, and the second high-pressure evaporator 25 in sequence. The pressure absorber 26 is connected to the inlet of the second solution chamber. The space below the second condenser 23, the second low-pressure evaporator 25, and the second high-pressure evaporator 27 is connected to the inlet of the second refrigerant water circulation passage. The outlet of the second refrigerant water circulation passage is set corresponding to the second low-pressure evaporator 25 and the second high-pressure evaporator 27. The arrangement of the second generator 22, the second condenser 23, the second low-pressure absorber 24, the second low-pressure evaporator 25, the second high-pressure absorber 26, the second high-pressure evaporator 27, the second solution chamber, and the second refrigerant water circulation passage is the same as the arrangement of the corresponding components in the combustion unit 2. It also has a solution pump 9, a solution heat exchanger 11, and a refrigerant pump 10.

[0033] The large temperature difference heat exchange unit 1 also includes a water-to-water heat exchanger 8, which is located between the second generator 22 and the second high-pressure evaporator 27. The pipeline between the second generator 22 and the second high-pressure evaporator 27 is connected to the hot medium channel of the water-to-water heat exchanger 8. A branch pipeline connected to the cold medium channel of the water-to-water heat exchanger 8 is provided at the secondary network water inlet 30. The end of the branch pipeline connected to the water-to-water heat exchanger 8 is connected to the secondary network water outlet 31.

[0034] This device has two operating conditions: one is when both the large temperature difference heat exchange unit 1 and the combustion unit 2 are working, and the other is when the large temperature difference heat exchange unit 1 is working, but the combustion part inside the combustion generator 3 of the combustion unit 2 is not working.

[0035] When both the large temperature difference heat exchange unit 1 and the combustion unit 2 are in operation, the various channels and heat exchange principles are as follows: the primary network water sequentially enters the first generator 16, the second generator 22, the water-to-water heat exchanger 8, the second high-pressure evaporator 27, the second low-pressure evaporator 25, the first high-pressure evaporator 21, and the first low-pressure evaporator 19, and then flows out from the primary network water outlet 29. Among them, heat exchange occurs with the dilute lithium bromide solution in the first generator 16 and the second generator 22, heat exchange occurs with the secondary network water in the water-to-water heat exchanger 8, and heat exchange occurs with the sprayed refrigerant water in the second high-pressure evaporator 27, the second low-pressure evaporator 25, the first high-pressure evaporator 21, and the first low-pressure evaporator 19.

[0036] The secondary network water is divided into three streams. The first stream flows out of the secondary network water outlet 31 after exchanging heat with the primary network water in the water-to-water heat exchanger 8. The second stream flows into the second condenser 23 after passing through the second high-pressure absorber 26 and the second low-pressure absorber 24, and flows out of the secondary network water outlet 31. It exchanges heat with the concentrated lithium bromide solution in the second high-pressure absorber 26 and the second low-pressure absorber 24, and exchanges heat with the water vapor generated by the lithium bromide dilute solution at the second generator 22 in the second condenser 23. The third stream flows into the first condenser 17 after passing through the first high-pressure absorber 20 and the first low-pressure absorber 18, and flows out of the secondary network water outlet 31. It exchanges heat with the concentrated lithium bromide solution in the first high-pressure absorber 20 and the first low-pressure absorber 18, and exchanges heat with the water vapor generated by the lithium bromide dilute solution at the first generator 16 in the first condenser 17.

[0037] The path and heat exchange principle of the lithium bromide solution in the large temperature difference heat exchange unit 1: The dilute lithium bromide solution in the second solution chamber passes sequentially through the solution heat exchanger 11, the second generator 22, the second low-pressure absorber 24, and the second high-pressure absorber 26, and then flows back to the second solution chamber. The dilute lithium bromide solution exchanges heat with the concentrated lithium bromide solution at the solution heat exchanger 11, and exchanges heat with the primary network water in the second generator 22 to form a concentrated lithium bromide solution and water vapor. The concentrated lithium bromide solution exchanges heat with the secondary network water at the second low-pressure absorber 24 and the second high-pressure absorber 26, and comes into contact with the water vapor generated after the refrigerant water in the second low-pressure evaporator 25 and the second high-pressure evaporator 27 absorbs heat. The water vapor cools down and condenses, mixes with the concentrated lithium bromide solution, forms a dilute lithium bromide solution, and then flows back to the second solution chamber.

[0038] The path and heat exchange principle of the refrigerant water in the large temperature difference heat exchange unit 1: The water vapor generated by the dilute lithium bromide solution at the second generator 22 exchanges heat with the second condenser 23 and condenses into water. This part of the water is mixed with the refrigerant water delivered by the refrigerant pump 10 to the second high-pressure evaporator 27 and sprayed onto the second high-pressure evaporator 27. The refrigerant pump 10 delivers the refrigerant water and sprays it onto the second low-pressure evaporator 25 and the second high-pressure evaporator 27. The sprayed refrigerant water exchanges heat with the primary network water to form water vapor, and the other part continues to be delivered by the refrigerant pump 10 in a flow state for spraying.

[0039] The principle of the afterburning unit 2: The combustion part in the afterburning generator 3 provides heat to heat the lithium bromide solution, and the generated water vapor is transported to the first condenser 17 to exchange heat with the secondary network water flowing in the first condenser 17.

[0040] The path and heat exchange principle of the lithium bromide solution in the combustion unit 2: The dilute lithium bromide solution in the first solution chamber passes sequentially through the solution heat exchanger 11, the first generator 16, the combustion generator 3, the first low-pressure absorber 18, and the first high-pressure absorber 20, and then flows back to the first solution chamber. The dilute lithium bromide solution exchanges heat with the concentrated lithium bromide solution at the solution heat exchanger 11, and exchanges heat with the primary network water in the first generator 16 to form a concentrated lithium bromide solution and water vapor. The concentrated lithium bromide solution continues to be transported to the combustion generator 3 to absorb the heat generated by the combustion part and continue to evaporate water vapor before continuing to be transported. The concentrated lithium bromide solution exchanges heat with the secondary network water at the first low-pressure absorber 18 and the first high-pressure absorber 20, and comes into contact with the water vapor generated by the refrigerant water at the first low-pressure evaporator 19 and the first high-pressure evaporator 21 after absorbing heat. The water vapor cools down and condenses, mixes with the concentrated lithium bromide solution, forms a dilute lithium bromide solution, and then flows back to the first solution chamber.

[0041] The path and heat exchange principle of the refrigerant water in the combustion unit 2: The water vapor generated by the lithium bromide dilute solution at the first generator 16 and the water vapor supplied by the combustion generator 3 exchange heat with the condenser and condense into water. This part of the water is mixed with the refrigerant water delivered by the refrigerant pump 10 to the first high-pressure evaporator 21 and sprayed onto the first high-pressure evaporator 21. The refrigerant pump 10 delivers the refrigerant water and sprays it onto the first low-pressure evaporator 19 and the first high-pressure evaporator 21. The sprayed refrigerant water exchanges heat with the primary network water to form water vapor, and the other part continues to be delivered by the refrigerant pump 10 in a flow state for spraying.

[0042] When the large temperature difference heat exchange unit 1 is in working condition and the combustion part in the combustion generator 3 of the combustion unit 2 is not in working condition, the various passages and heat exchange principles are basically the same as when both the large temperature difference heat exchange unit 1 and the combustion unit 2 are in working condition. The difference is that in the combustion generator 3, the lithium bromide concentrated solution that enters no longer absorbs the heat of the combustion part, and the combustion generator 3 no longer generates water vapor to supply to the first condenser 17.

[0043] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0044] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A regenerative large temperature difference heat exchanger unit, characterized in that, The system includes a large temperature difference heat exchange unit and a combustion supplement unit. The combustion supplement unit comprises a combustion supplement generator, a first generator, a first condenser, a first low-pressure absorber, a first low-pressure evaporator, a first high-pressure absorber, and a first high-pressure evaporator. The primary network water inlet sequentially passes through the first generator, the large temperature difference heat exchange unit, the first high-pressure evaporator, and the first low-pressure evaporator, and is connected to the primary network water outlet. The secondary network water main pipeline is connected to the secondary network water outlet through the large temperature difference heat exchange unit. The secondary network water branch pipelines pass through the first low-pressure absorber and the first high-pressure absorber, respectively, and then through the first condenser. The device is connected to the secondary network water outlet. The outlet of the first solution chamber, which is used to hold the lithium bromide solution, passes through the first generator, the combustion generator, the first low-pressure absorber, and the first high-pressure absorber in sequence and is connected to the inlet of the first solution chamber. The steam passage outlet of the combustion generator is set to correspond to the first condenser. The space below the first condenser, the first low-pressure evaporator, and the first high-pressure evaporator is connected to the inlet of the first refrigerant water circulation passage. The outlet of the first refrigerant water circulation passage is set to correspond to the first low-pressure evaporator and the first high-pressure evaporator.

2. The supplementary combustion type large temperature difference heat exchanger unit according to claim 1, characterized in that, The first generator and the first condenser are disposed in the same cavity, the first low-pressure absorber and the first low-pressure evaporator are disposed in the same cavity, and the first high-pressure absorber and the first high-pressure evaporator are disposed in the same cavity.

3. The supplementary combustion type large temperature difference heat exchanger unit according to claim 2, characterized in that, Anti-splash plates are provided between the first generator and the first condenser, between the first low-pressure absorber and the first low-pressure evaporator, and between the first high-pressure absorber and the first high-pressure evaporator. Gas passages for steam to pass through are provided on the anti-splash plates.

4. The supplementary combustion type large temperature difference heat exchanger unit according to claim 2, characterized in that, The first solution chamber is integrally formed with the cavity of the first high-pressure evaporator, and the first solution chamber is located at the bottom of the cavity.

5. The supplementary combustion type large temperature difference heat exchanger unit according to claim 1, characterized in that, The first refrigerant water circulation path includes a water circulation pipe, a refrigerant pump installed on the water circulation pipe, and a spray section. The spray section is located at the end of the water circulation pipe and is installed corresponding to the first low-pressure evaporator and the first high-pressure evaporator. A water tray is installed in the space below the first low-pressure evaporator and the first high-pressure evaporator. The outlet of the water tray is connected to the inlet of the water circulation pipe.

6. The supplementary combustion type large temperature difference heat exchanger unit according to claim 5, characterized in that, Branch pipes are provided in the water circulation pipes corresponding to the positions of the first low-pressure evaporator and the first high-pressure evaporator. The space below the first condenser is connected to the branch pipes of the water circulation pipes corresponding to the first high-pressure evaporator through pipes.

7. The supplementary combustion type large temperature difference heat exchanger unit according to claim 1, characterized in that, The first solution chamber is connected to the inlet of the first generator via a solution pump.

8. The supplementary combustion type large temperature difference heat exchanger unit according to claim 7, characterized in that, A solution heat exchanger is provided between the solution pump and the first generator. The pipeline of the solution pump is connected to the cold medium channel in the solution heat exchanger, and the solution output pipeline of the afterburner is connected to the hot medium channel in the solution heat exchanger.

9. The supplementary combustion type large temperature difference heat exchanger unit according to any one of claims 1-8, characterized in that, The large temperature difference heat exchange unit includes a second generator, a second condenser, a second low-pressure absorber, a second low-pressure evaporator, a second high-pressure absorber, and a second high-pressure evaporator. The outlet of the first generator is connected to the inlet of the first high-pressure evaporator via the second generator, the second high-pressure evaporator, and the second low-pressure evaporator in sequence. The secondary network water main pipeline is connected to the outlet of the secondary network water via the second high-pressure absorber and the second low-pressure absorber, respectively, and then via the second condenser. The outlet of the second solution chamber, which holds the lithium bromide solution, is connected to the inlet of the second solution chamber via the second generator, the second low-pressure absorber, and the second high-pressure absorber in sequence. The space below the second condenser, the second low-pressure evaporator, and the second high-pressure evaporator is connected to the inlet of the second refrigerant water circulation path. The outlet of the second refrigerant water circulation path is set corresponding to the second low-pressure evaporator and the second high-pressure evaporator. The layout of the second generator, the second condenser, the second low-pressure absorber, the second low-pressure evaporator, the second high-pressure absorber, the second high-pressure evaporator, the second solution chamber, and the second refrigerant water circulation path is the same as the layout of the corresponding components in the combustion unit.

10. The supplementary combustion type large temperature difference heat exchanger unit according to claim 9, characterized in that, The large temperature difference heat exchange unit also includes a water-to-water heat exchanger, which is located between the second generator and the second high-pressure evaporator. The pipeline between the second generator and the second high-pressure evaporator is connected to the heat medium channel of the water-to-water heat exchanger. A branch pipeline connected to the cold medium channel of the water-to-water heat exchanger is provided at the secondary network water inlet, and the end of the branch pipeline connected to the water-to-water heat exchanger is connected to the secondary network water outlet.

Images