Dual-purpose open absorption heat pump and operation method

Abstract

The application discloses a cold and hot dual-purpose open absorption heat pump and an operation method, which comprises an absorption generator, a first heat exchange system connected with a section A below the absorption generator, a second heat exchange system connected with a section B above the absorption generator, and a pump body and a valve body connected between the first heat exchange system and the second heat exchange system, wherein when the valve body and the pump body are closed, the first heat exchange system and the second heat exchange system independently operate in a heating mode; when the valve body and the pump body are opened, circulating medium of the first heat exchange system and circulating medium of the second heat exchange system are communicated, and the state is switched to a refrigeration mode; the device can recover heat to heat the heating water by using the high-temperature and high-humidity characteristics of the device, the open solution absorption and the closed generation in the case of heating demand; and the device can be used for refrigeration by using the high-temperature and unsaturated characteristics of the device, the open generation and the closed absorption in the case of no heating demand but refrigeration demand, thereby improving the utilization rate of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of open absorption heat pump, in particular to a cold and hot dual-purpose open absorption heat pump and operation method. BACKGROUND

[0002] In the industrial production process, part of the high temperature and high humidity unsaturated flue gas will be generated. At present, there are direct heat exchange, open absorption heat pump, closed absorption heat pump and other ways to recover heat. In the northern region, the recovered flue gas waste heat is generally used for heating in winter, and in summer there is no heat demand, so the waste heat recovery equipment or system is idle, and the utilization rate of the equipment is not high.

[0003] The patent with publication number CN104089430A provides a spray type open absorption heat pump system for recovering waste heat of a flue gas containing moisture. The high temperature flue gas containing moisture enters the generator and directly contacts the atomized working medium sprayed by the spraying device for heat and mass transfer, so that the heat transfer coefficient is high, and the heat and water vapor in the flue gas containing moisture can be effectively recovered in the heat exchange process, so that the temperature of the flue gas containing moisture is greatly reduced and discharged from the absorber. The open absorption heat pump is used to recover waste heat, but only the functions of the system are increased, and the above problems still exist. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art, and to provide a cold and hot dual-purpose open absorption heat pump and operation method.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme: a cold and hot dual-purpose open absorption heat pump, comprising:

[0006] The absorption generator is provided with a gas lifting device, so that the gas can pass from bottom to top, and the liquid cannot pass from top to bottom;

[0007] The lower A section of the absorption generator is connected with the first heat exchange system, and the upper B section of the absorption generator is connected with the second heat exchange system. The first heat exchange system and the second heat exchange system are connected through a pump body and a valve body. When the valve body and the pump body are closed, the first heat exchange system and the second heat exchange system operate independently, and the state is heating mode, which operates as an absorption heat pump.

[0008] The first heat exchange system comprises a first heat exchanger, which is connected with a solution tank through the first heat exchange gas;

[0009] The second heat exchange system comprises a second heat exchanger, which is connected with the solution tank through the second heat exchange gas. The solution tank is connected with an absorption generator through a solution heat exchanger. One way of the absorption generator is connected with a vacuum maintaining device, and the other way is connected with a water tank through a condenser evaporator.

[0010] When the valve body is opened, the circulating medium of the first heat exchange system is communicated with the circulating medium of the second heat exchange system, the state is switched to the refrigeration mode, and the water storage tank is switched from the communication state to the closed state with the outside.

[0011] As a further description of the above technical solution: the bottom of the A section of the absorption generator is connected to the first heat exchanger through a pump body, one side of the first heat exchanger is connected to a cooling water circuit, the other end is connected to the top of the A section of the absorption generator through a valve body, and the other side is transported to the solution storage tank in the second heat exchange system.

[0012] As a further description of the above technical solution: the bottom of the A section of the absorption generator is connected to the pump body and the valve body.

[0013] As a further description of the above technical solution: the bottom of the B section of the absorption generator is connected to the second heat exchanger, one side of the second heat exchanger is connected to a cooling water circuit, and the other side output is connected to the solution storage tank.

[0014] As a further description of the above technical solution: the top of the solution storage tank is connected to the top of the B section of the absorption generator through a pump body, the bottom of the solution storage tank is connected to the solution heat exchanger through a pump body, and the other side is connected to the top of the A section of the absorption generator through a valve body.

[0015] As a further description of the above technical solution: one side of the solution heat exchanger is connected to the absorption generator, and the absorption generator is designed as a shell-and-tube type, and the tube side is connected to a cooling water circuit.

[0016] As a further description of the above technical solution: the absorption generator is connected to a vacuum maintenance device through a valve body, and non-condensable gas is discharged to the outside.

[0017] As a further description of the above technical solution: the input end of the absorption generator is used to receive water in the water storage tank, one side of the output end of the water storage tank is connected to the condenser evaporator and connected to the absorption generator, the other side is connected to external equipment through a steam condensate pump and a valve body, and the pipeline between the water storage tank and the vacuum maintenance device is connected through a valve body.

[0018] As a further description of the above technical solution: the other output end of the absorption generator is connected to the solution heat exchanger.

[0019] Also included is a running method of an open absorption heat pump for cold and hot use, the running method is suitable for the heat pump in any one of the above technical solutions,

[0020] S1: in the refrigeration mode, the circulating medium of the first heat exchange system and the second heat exchange system is solution, the medium of the generator is cooling water, the pump valve body at the bottom of the A section of the absorption generator is closed, the valve body between the first heat exchanger and the top of the A section of the absorption generator is closed, the steam condensate pump and the valve body at the pipeline between the water storage tank and the external equipment are closed, and the valve body between the water storage tank and the vacuum maintenance device is closed;

[0021] S2: the flue gas enters the A section of the absorption generator, is sprayed by the solution, is transported to the first heat exchanger through the pump body at the bottom, is transported to the solution storage tank through the valve body after heat exchange, the solution storage tank transports the circulating medium to the top of the A section and the B section of the absorption generator for spraying through the pump body, and simultaneously transports the circulating medium to the solution heat exchanger, the solution heat exchanger transports the solution to the generator, absorbs low-pressure steam, and at the same time transmits heat to the cooling water, after the solution becomes dilute, the solution passes through the solution heat exchanger again and returns to the solution storage tank,

[0022] the solution in the B section of the absorption generator enters the solution storage tank from the second heat exchanger;

[0023] S3: the valve body between the first heat exchanger 2 and the A section of the absorption generator 1, the pump body at the bottom of the A section of the absorption generator 1, the valve body between the water storage tank 8 and the vacuum maintenance device 7, the pump body at the water storage tank 8, the valve body between the solution storage tank and the first heat exchanger, the pump valve body between the solution storage tank and the top of the A section of the absorption generator, and the valve body between the generator and the vacuum maintenance device are closed, so that the circulating medium between the first heat exchange system and the second heat exchange system is independently transported, and the heating mode is switched;

[0024] S4: in the heating mode, the circulating medium of the first heat exchange system is water, and the circulating medium of the second heat exchange system is solution, after spraying in the A section of the absorption generator, the circulating medium is transported to the first heat exchanger through the pump body, and the circulating medium is transported to the top of the A section of the absorption generator for spraying again through the valve body of the first heat exchanger;

[0025] S5: after the flue gas rises from the A section to the B section of the absorption generator, the solution is sprayed, the solution is transported to the second heat exchanger at the bottom of the B section of the absorption generator, is transported to the generator through the solution heat exchanger by the pump body, and the water vapor is transported to the water storage tank through the condenser;

[0026] S6: the heated solution is transported to the solution storage tank through the solution heat exchanger by the pump body of the generator, and is sprayed again to the top of the B section of the absorption generator.

[0027] The technical scheme has the following advantages or beneficial effects:

[0028] 1. For high-temperature, high-humidity and unsaturated flue gas, such as alumina roasting furnace flue gas, coal-fired boiler flue gas before wet desulfurization, waste incinerator flue gas, gas boiler exhaust, etc., these flue gases are generally higher than 100℃, in the heating season, the high-temperature and high-humidity characteristics are used to recover heat to heat the heating water by using solution open absorption and closed generation; in the non-heating season, there is no heating demand but there is a cooling demand, the high-temperature and unsaturated characteristics are used to generate open and absorb closed to cool, and the utilization rate of the equipment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A structure diagram of a cold and hot open absorption heat pump is provided.

[0030] LEGEND:

[0031] 1. Absorption generator tower; 2. First heat exchanger; 3. Solution storage tank; 4. Second heat exchanger; 5. Solution heat exchanger; 6. Absorber; 7. Vacuum maintenance device; 8. Water storage tank; 9. Condenser evaporator. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0033] REFERENCE Figure 1In one embodiment of the present application, a cold and hot dual-purpose open absorption heat pump comprises: an absorption generator 1, which is provided with a gas lifting device in the middle, so that gas can pass from bottom to top, and liquid cannot pass from top to bottom; a first heat exchange system connected to the lower A section of the absorption generator 1, a second heat exchange system connected to the upper B section of the absorption generator 1, and a pump body and a valve body connected between the first heat exchange system and the second heat exchange system; when the valve body and the pump body are closed, the first heat exchange system and the second heat exchange system operate independently, in a heating mode, as an absorption heat pump; the first heat exchange system comprises a first heat exchanger 2 connected to a solution storage tank 3 through a first heat exchange gas 2; the second heat exchange system comprises a second heat exchanger 4 connected to the solution storage tank 3 through a second heat exchange gas 4; the solution storage tank 3 is connected to an absorption generator 6 through a solution heat exchanger 5; one way of the absorption generator 6 is connected to a vacuum maintenance device 7, and the other way is connected to a water storage tank 8 through a condensation evaporator 9; when the valve body and the pump body are opened, the circulating medium of the first heat exchange system is communicated with the circulating medium of the second heat exchange system, the state is switched to a cooling mode, and the water storage tank 9 is switched from a communication state to a closed state with the outside.

[0034] In this embodiment, when heating, the system performs heating as a general open absorption heat pump, drives steam or hot water as a driving heat source, and uses flue gas as a waste heat source to provide heating water as heat production.

[0035] At this time, the absorption generator 6 is used as a generator, and the condensation evaporator 9 is used as a condenser.

[0036] At this time, the A section of the absorption generator uses water as the circulating medium; the B section of the absorption generator uses a high-hygroscopic water solution as the circulating medium; the middle part of the absorption generator uses a gas lifting device that allows gas to pass from bottom to top and liquid to pass from top to bottom, so as to block the passage of liquid from top to bottom.

[0037] When cooling, the system uses flue gas as a driving heat source to open the solution, reduces the temperature of the chilled water, and the heat generated by the system is taken away by the cooling water.

[0038] At this time, the absorption generator 6 is used as an absorber, and the condensation evaporator 9 is used as an evaporator.

[0039] At this time, the A section and the B section of the absorption generator 1 both use solution as the circulating medium, and both sections perform solution concentration, which can make the concentration effect better; the middle part of the absorption generator 1 uses a gas lifting device that allows gas to pass from bottom to top and liquid to pass from top to bottom, so as to block the passage of liquid from top to bottom.

[0040] Referring to the attached diagram, the bottom of section A of the absorption tower 1 is connected to the first heat exchanger 2 via a pump body. One side of the first heat exchanger 2 is connected to a cooling water circuit, and the other end is connected to the top of section A of the absorption tower 1 via a valve body. The other end is supplied to the solution storage tank 3 in the second heat exchange system. The pump body and valve body are connected to the other side of the bottom of section A of the absorption tower 1. The bottom of section B of the absorption tower 1 is connected to the second heat exchanger 4. One side of the second heat exchanger 4 is connected to a cooling water circuit, and the other end of the outlet is connected to the solution storage tank 3.

[0041] In this embodiment, under heating mode, the flue gas passes through section A of the absorption generator tower. After being sprayed with water, it is cooled to below the dew point temperature and becomes wet-saturated. After passing through the gas lifting device, it reaches section B, where it is sprayed with solution and the dew point is further reduced, becoming unsaturated before being discharged.

[0042] In cooling mode, the flue gas passes sequentially through sections A and B of the absorption generator tower. It comes into direct contact with the solution. Since the flue gas is high-temperature unsaturated, it is not wet-saturated by water spraying as in heating mode. Therefore, in its high-temperature unsaturated state, the solution does not absorb moisture from the flue gas but releases moisture into it, thus realizing the solution generation process. The flue gas is discharged after being humidified and cooled by stages A and B.

[0043] The top of the solution storage tank 3 is connected to the top of section B of the absorption tower 1 via a pump body. The bottom of the solution storage tank 3 is connected to the solution heat exchanger 5 via a pump body, and to the top of section A of the absorption tower 1 via a valve body. The output end of one side of the solution heat exchanger 5 is connected to the absorption generator 6. The absorption generator 6 is a shell-and-tube design, and the tube side is connected to the cooling water circuit. The absorption generator 6 is connected to the vacuum maintaining device 7 via a valve body to maintain the vacuum level inside the pipeline.

[0044] In this embodiment, the solution storage tank 3 can use a pump to transport the circulating medium to the top of sections A and B of the absorption tower 1 for spraying. It can also use a pump to transport the circulating medium to the solution heat exchanger 5 for heat exchange, and then to the absorption generator 6 for heating.

[0045] The input end of the generator absorber 6 is used to receive water from the water storage tank 8. One output end of the water storage tank 8 is connected to the condenser evaporator 9 and then to the generator absorber 6. The other output end is connected to external equipment through the steam condensate pump and valve body. The pipeline between the water storage tank 8 and the vacuum maintaining device 7 is connected through the valve body.

[0046] The other output of the absorber 6 is connected to the solution heat exchanger 5.

[0047] The technical solution of the present invention also includes an embodiment of an operation method for an open absorption heat pump that can be used for both cooling and heating. The operation method is applicable to the heat pumps in any of the above technical solutions.

[0048] S1: In the refrigeration mode, the bottom pump valve of the A section of the absorption generator 1 is closed, the first heat exchanger 2 and the top valve of the A section of the absorption generator 1 are closed, the water storage tank 8 and the steam condensate pump and valve at the external device connection pipeline are closed, the valve between the water storage tank 8 and the vacuum maintenance device 7 is closed;

[0049] S2: The flue gas enters the A section of the absorption generator 1, after being sprayed by the solution, it is transported to the first heat exchanger 2 through the bottom pump, after being heated by the first heat exchanger 2, it is transported to the solution storage tank 3 through the valve, the solution storage tank 3 transports the circulating medium to the top of the A section and the B section of the absorption generator 1 for spraying through the pump, at the same time, it is transported to the solution heat exchanger 5, the solution heat exchanger 5 transports the solution to the absorption generator 6, absorbs the low-pressure steam and transfers heat to the cooling water, after that, the solution becomes dilute and passes through the solution heat exchanger 5 again and returns to the solution storage tank 3,

[0050] The solution in the B section of the absorption generator 1 enters the solution storage tank 3 from the second heat exchanger 4;

[0051] S3: Open the valve between the first heat exchanger 2 and the A section of the absorption generator 1, the pump valve that connects the bottom of the A section of the absorption generator 1 with the outside world, the valve between the water storage tank 8 and the vacuum maintenance device 7, the pump valve that connects the water storage tank 8 with the outside world, close the valve between the solution storage tank 3 and the first heat exchanger 2, the pump valve between the solution storage tank 3 and the top of the A section of the absorption generator 1, close the valve between the absorption generator 6 and the vacuum maintenance device 7, so that the circulating medium between the first heat exchange system and the second heat exchange system is transported independently respectively, switch to the heating mode;

[0052] S4: In the heating mode, the circulating medium of the first heat exchange system is water, and the circulating medium of the second heat exchange system is solution, after being sprayed in the A section of the absorption generator 1, it is sent to the first heat exchanger 2 through the pump, and the first heat exchanger 2 transports the circulating medium to the top of the A section of the absorption generator 1 through the valve for spraying again;

[0053] S5: After the flue gas rises from the A section to the B section of the absorption generator 1, it is sprayed by the solution, and the solution at the bottom of the B section of the absorption generator 1 is transported to the second heat exchanger 4, and then transported to the absorption generator 6 through the pump and the solution heat exchanger 5 for heating, and the water vapor is transported to the water storage tank 8 through the condenser 9;

[0054] S6: The heated solution in the absorption generator 6 is transported to the solution storage tank 3 through the pump and the solution heat exchanger 5, and then sprayed to the top of the B section of the absorption generator 1 again.

[0055] In this embodiment, in the heating mode: flue gas passes through the A section of the absorption generator 1, and is cooled to below the dew point temperature by water spraying, and becomes a wet saturated state, and passes through the air lift device to reach the B section, and after passing through the solution spraying, the dew point is further reduced, and becomes an unsaturated state for discharge.

[0056] The sprayed water is pumped from the bottom of the tower into the first heat exchanger 2, transfers heat to the heating water, and then enters the A section to spray the flue gas. After absorbing the heat and moisture in the flue gas, it returns to the bottom of the tower, and so on.

[0057] Due to the decrease of the dew point of the flue gas, the moisture in the flue gas continuously condenses into the sprayed water. A condensate discharge pump is additionally provided at the bottom of the tower. When the liquid level at the bottom of the tower rises to a set value, a certain amount of water is discharged to ensure the continuous operation of the system.

[0058] The solution has water absorption. The solution in the solution tank 3 is pumped into the B section of the absorption generator 1 to directly contact and spray the flue gas. After absorbing the moisture and heat in the flue gas, it becomes a dilute solution with a higher temperature, enters the second heat exchanger 4 to transfer heat to the heating water, and then returns to the solution tank 3, and so on.

[0059] The solution in the solution tank 3 is pumped into the generator after being heated by the solution heat exchanger 5. The high-temperature concentrated solution and water vapor are generated by heating and boiling with steam or hot water. The high-temperature concentrated solution is cooled by the low-temperature dilute solution in the solution heat exchanger 5 and then returns to the solution tank 3, and so on. The water vapor enters the condenser to heat the hot water. The steam transfers heat to the heating water in the condenser, and then condenses and enters the water tank 8.

[0060] The water tank 8 is provided with a steam condensate pump that is intermittently opened. The condensate can be discharged when the liquid level in the water tank 8 rises to a high value.

[0061] The water tank 8 is connected to the vacuum maintenance device 7. The vacuum maintenance device 7 operates according to the driving heat source. If the driving heat source is high in quality, the vacuum maintenance device 7 can not operate. If the driving heat source is low in quality, the vacuum maintenance device 7 can be started to reduce the pressure in the generator, so that the solution can be generated at a lower temperature.

[0062] The heating water passes through the first heat exchanger 2, the second heat exchanger 4, and the condenser to be heated, so that the heat sources of the three heat exchangers can be appropriately connected in series or parallel.

[0063] The driving steam or driving hot water enters the generator to release heat and then is discharged.

[0064] In the refrigeration mode, the flue gas successively passes through the A section and B section of the absorption generator 1, and directly contacts with the solution. Since the flue gas is high-temperature unsaturated flue gas, it is not wet saturated as in the heating process, and thus, the solution will not absorb the moisture of the flue gas but release the moisture into the flue gas in the high-temperature unsaturated state, so as to realize the solution generation process. The flue gas is discharged after being humidified and cooled in the A and B stages.

[0065] The solution is pumped from the solution storage tank 3 into the A section and B section of the absorption generator 1 to directly contact and spray the flue gas. The solution releases the water vapor into the flue gas, and the temperature is increased, so as to become high-temperature concentrated solution. The concentrated solution after the B section spraying is returned to the solution storage tank 3 after transferring heat to the cooling water through the second heat exchanger 4. The concentrated solution after the A section spraying is returned to the solution storage tank 3 after transferring heat to the cooling water through the first heat exchanger 2.

[0066] The solution in the solution storage tank 3 is pumped into the solution heat exchanger 5 to transfer heat to the dilute solution and then enter the absorber. In the absorber, the solution absorbs the low-pressure steam while transferring heat to the cooling water. After that, the solution becomes dilute and then passes through the solution heat exchanger 5 again and returns to the solution storage tank 3.

[0067] The water in the water storage tank 8 is evaporated into low-pressure steam by the evaporator under low pressure, and then enters the absorber to be absorbed by the solution.

[0068] The absorber is connected to the vacuum maintenance device 7 to maintain the vacuum degree of the system.

[0069] The water storage tank 8 is provided with an intermittent water replenishment pipeline through a valve body. When the water level in the water storage tank 8 is reduced to a set value, the water consumed by continuous evaporation is replenished.

[0070] The cooling water passes through the first heat exchanger 2, the second heat exchanger 4, and the absorber to carry away the heat of the system.

[0071] The chilled water enters the evaporator to reduce the temperature and then is discharged from the system to realize refrigeration.

[0072] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the scope of the present application shall be included in the protection scope of the present application.

Claims

1. A cold and heat dual-purpose open-type absorption heat pump, characterized by, The application relates to an absorption generating tower (1) which is provided with an air lifting device in the middle, so that gas can pass through from bottom to top and liquid cannot pass through from top to bottom. The lower A section of the absorption generating tower (1) is connected with a first heat exchange system, the upper B section of the absorption generating tower (1) is connected with a second heat exchange system, and the first heat exchange system and the second heat exchange system are connected through a pump body and a valve body; when the valve body and the pump body are closed, the first heat exchange system and the second heat exchange system independently operate in a heating mode; in the heating mode, the circulating medium of the first heat exchange system is water, and the circulating medium of the second heat exchange system is solution, and the second heat exchange system operates as an absorption heat pump. The first heat exchange system comprises a first heat exchanger (2) which is connected with a solution storage tank (3). The second heat exchange system comprises a second heat exchanger (4) which is connected with the solution storage tank (3) through the second heat exchanger (4), the solution storage tank (3) is connected with an absorption generator (6) through a solution heat exchanger (5), one way of the absorption generator (6) is connected with a vacuum maintaining device (7), and the other way is connected with a water storage tank (8) through a condensation evaporator (9). When the valve body and the pump body are opened, the circulating medium of the first heat exchange system is communicated with the circulating medium of the second heat exchange system, the state is switched to a refrigeration mode, in the refrigeration mode, the circulating medium of the first heat exchange system and the second heat exchange system is solution; the water storage tank (8) is switched from the communication state to the closed state with the outside world; One side of the bottom of the A section of the absorption generating tower (1) is connected with the input end of the first heat exchanger (2) through a pump body, one side of the first heat exchanger (2) is connected with a cooling water circuit, and the output end of the first heat exchanger (2) is connected to the top of the A section of the absorption generating tower (1) through a valve body and is transported into the solution storage tank (3) in the second heat exchange system through the other way. The top of the solution storage tank (3) is connected to the top of the B section of the absorption generating tower (1) through a pump body, the bottom of the solution storage tank (3) is connected to the solution heat exchanger (5) through a pump body in one way and is connected to the top of the A section of the absorption generating tower (1) through a valve body and a pump body in the other way. The output end of one side of the solution heat exchanger (5) is connected with the absorption generator (6), the absorption generator (6) transports the heated solution into the solution storage tank (3) through the solution heat exchanger (5) through a pump body, and the absorption generator (6) is designed in a tube-in-shell mode, and the tube side is connected with a cooling water circuit. The other side of the bottom of the A section of the absorption generating tower (1) is connected with a pump body and a valve body.

2. The open absorption heat pump of claim 1, wherein: The bottom of the B section of the absorption generating tower (1) is connected with the second heat exchanger (4), one side of the second heat exchanger (4) is connected with a cooling water circuit, and the other side output port is connected with the solution storage tank (3).

3. The open absorption heat pump of claim 2, wherein: The absorption generator (6) is connected with the vacuum maintaining device (7) through a valve body, and non-condensable gas is discharged to the outside world.

4. The open absorption heat pump of claim 3, wherein: ​ 5. The open absorption heat pump of claim 4, wherein: The input end of the absorption generator (6) is used for receiving water in the water storage tank (8), the output end of the water storage tank (8) is connected to the condenser evaporator (9) in one way, and is connected to the absorption generator (6) in another way, and is connected to the external equipment through the steam condensate pump and the valve body, and the pipeline between the water storage tank (8) and the vacuum maintaining device (7) is connected through the valve body.

6. A method of operating a cold heat dual-purpose open absorption heat pump, characterized by, The operation method is suitable for the heat pump in claim 5, S1: in the refrigeration mode, the circulating medium of the first heat exchange system and the second heat exchange system is solution, the pipe side medium of the absorption generator (6) is cooling water, the pump body valve body at the bottom of the A section of the absorption generator (1) is closed, the valve body between the first heat exchanger (2) and the top of the A section of the absorption generator (1) is closed, the steam condensate pump at the pipeline connecting the water storage tank (8) and the external equipment is closed, and the valve body between the water storage tank (8) and the vacuum maintaining device (7) is closed; S2: the flue gas enters the A section of the absorption generator (1), is sprayed through the solution, is transported to the first heat exchanger (2) through the pump body at the bottom, is transported to the solution storage tank (3) through the valve body after heat exchange through the first heat exchanger (2), the solution storage tank (3) transports the circulating medium to the top of the A section and the B section of the absorption generator (1) for spraying through the pump body, and simultaneously transports the circulating medium to the solution heat exchanger (5), the solution heat exchanger (5) transports the solution to the absorption generator (6), absorbs low-pressure steam, and at the same time, transfers heat to the cooling water, and thereafter, the solution becomes dilute again, passes through the solution heat exchanger (5) and returns to the solution storage tank (3), The solution in the B section of the absorption generator (1) enters the solution storage tank (3) from the second heat exchanger (4); S3: the valve body between the first heat exchanger 2 and the A section of the absorption generator (1) is opened, the pump body at the bottom of the A section of the absorption generator (1) is opened, the valve body between the water storage tank (8) and the vacuum maintaining device (7) is opened, the pump body at the water storage tank (8) is opened, the valve body between the solution storage tank (3) and the first heat exchanger (2) is closed, the pump body between the solution storage tank (3) and the top of the A section of the absorption generator (1) is closed, the valve body between the absorption generator (6) and the vacuum maintaining device (7) is closed, so that the circulating medium between the first heat exchange system and the second heat exchange system is independently transported respectively, and the heating mode is switched; S4: in the heating mode, the circulating medium of the first heat exchange system is water, the circulating medium of the second heat exchange system is solution, the shell side medium of the absorption generator (6) is a driving heat source, the solution is sprayed in the A section of the absorption generator (1), is transported to the first heat exchanger (2) through the pump body, and the circulating medium is transported to the A section of the absorption generator (1) through the valve body of the first heat exchanger (2) again for spraying. S5: After the flue gas rises from the A section of the absorption tower (1) to the B section, it is sprayed by the solution, and the solution at the bottom of the B section of the absorption tower (1) is transported into the second heat exchanger (4), and then transported into the absorption generator (6) through the solution heat exchanger (5) by the pump body after being heated, and the water vapor is transported into the water storage tank (8) through the condensation evaporator (9); S6: The absorption generator (6) transports the heated solution into the solution storage tank (3) through the solution heat exchanger (5) by the pump body, and then sprays it again above the B section of the absorption tower (1).

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