CN202835901U - Lithium bromide absorption type first kind heat pump unit usable in winter and summer - Google Patents

Abstract

The utility model relates to a heat pump unit. The lithium bromide absorption type heat pump unit shared by winter and summer of the utility model includes evaporator, absorber, generator, condenser, hot water pipe, steam turbine output pipeline, heat source water inlet, heat source water outlet, condenser, hot water tube, the evaporator communicates with the absorber, the generator communicates with the condenser, the bottom of the absorber communicates with the generator through pipe IV, the bottom of the generator communicates with the top of the absorber through pipe III, and includes the main heat exchanger, Auxiliary heat exchanger, the hot water pipe passes through the absorber, condenser, and auxiliary heat exchanger in sequence, and pipe III and pipe IV are both connected to the main heat exchanger and exchange heat through the main heat exchanger; the heat source water inlet and heat source water outlet are respectively connected to The two ends of the pipe V arranged in the evaporator are connected, and the other ends of the heat source water inlet and the heat source water outlet are respectively connected with the condenser. Solve the shortcoming that it cannot be used in summer before.

Description

Winter and summer shared lithium bromide absorption type I heat pump unit

technical field

The utility model relates to a heat pump unit.

Background technique

The lithium bromide absorption unit uses water as the refrigerant, lithium bromide solution as the absorbent, uses the heat generated by direct combustion of steam, fuel oil/gas as the heat source, and uses the principle of evaporation and absorption to realize heating. The lithium bromide absorption heat pump units currently used can be divided into single-effect and double-effect absorption heat pumps according to their working methods. According to the type of driving heat source, it can be divided into steam type, direct combustion type and so on. For waste heat recovery units, single-effect lithium bromide absorption heat pumps are common in the market, that is, a process that occurs only once in the heat pump process (solution concentration). This kind of lithium bromide absorption type heat pump unit generally has a relatively simple structure, and it is more common in the industrial industry for waste heat recovery and utilization of heat pumps. However, due to the limitations of single-effect lithium bromide absorption heat pump units, the hot water produced by them cannot be used in summer, and is generally only used in winter. In this way, for the heat of exhausted steam that must be discharged, the application of conventional heat pump units has the following disadvantages:

(1) The heat of exhausted steam cannot be used in summer

The heat of the exhausted steam can only be lost to the atmosphere through the cooling tower in the previous method in summer. In this way, part of the cooling water will be lost into the atmosphere in the form of steam, resulting in waste of water resources.

(2) Thermal pollution from exhaust steam heat emission

For the heat generated by the steam exhaust mentioned above in the process, etc., it must be discharged, which will cause inevitable thermal pollution to the discharge environment. If the heat of exhausted steam can be utilized, the heat pollution emitted can be reduced.

Utility model content

The technical effects of the utility model can overcome the above defects, and provide a lithium bromide absorption type heat pump unit shared by winter and summer, which solves the problem that the lithium bromide absorption type type heat pump unit cannot operate in summer.

In order to achieve the above object, the utility model adopts the following technical scheme: it includes an evaporator, an absorber, a generator, a condenser, a hot water pipe, a steam turbine output pipeline, a heat source water inlet, a heat source water outlet, a condenser, a hot water tube, the evaporator communicates with the absorber, the generator communicates with the condenser, the bottom of the absorber communicates with the generator through pipeline IV, the bottom of the generator communicates with the top of the absorber through pipeline III, and includes the main heat exchanger, Auxiliary heat exchanger, the hot water pipe passes through the absorber, condenser, and auxiliary heat exchanger in sequence, and pipe III and pipe IV are both connected to the main heat exchanger and exchange heat through the main heat exchanger; the heat source water inlet and heat source water outlet are respectively connected to The two ends of the pipe V arranged in the evaporator are connected, the other end of the heat source water inlet and the heat source water outlet are respectively connected to the condenser, and the output pipeline of the steam turbine passes through the condenser and is respectively connected to the hot water pipe protruding from the condenser Auxiliary heat exchanger and exchange heat through the auxiliary heat exchanger.

The utility model is based on the principle of a lithium bromide absorption type heat pump, and adds an auxiliary heat exchange cycle. The hot water produced by the heat pump is used to heat the steam condensed water after passing through the condenser, which solves the problem of hot water produced by the heat pump in summer. Unusable problem. Hot water enters the absorber, condenser, and auxiliary heat exchanger in turn. In the cycle described in the utility model, the difficult problem that the lithium bromide absorption heat pump unit cannot operate in summer is solved. Compared with the usual unit, the utilization rate of the heat pump is improved; because the heat pump completely replaces the cooling tower, it reduces heat pollution and waste of water resources, which is beneficial to environmental protection. The purpose of this utility model is to overcome the above-mentioned shortcoming that the lithium bromide absorption type heat pump unit cannot be used in summer, so that the heat pump unit can be used normally in winter and summer, so as to replace the traditional method and achieve the purpose of energy saving, consumption reduction and emission reduction .

The bottom of the evaporator communicates with the top of the evaporator through the refrigerant pump and pipeline II in turn.

The evaporator communicates with the bottom of the condenser through the vacuum trap and pipe I in turn.

A dilute solution pump is provided on pipeline IV.

A concentrated solution pump is provided on pipeline III.

The evaporator and the absorber are connected through the liquid blocking device II, and the generator and the condenser are connected through the liquid blocking device I. The liquid blocking device can prevent the liquid droplets from flowing with the refrigerant vapor to cause corrosion, refrigerant pollution or heat loss.

The main heat exchanger adopts shell and tube heat exchanger or plate heat exchanger.

The heat pump unit adds an auxiliary heat exchanger on the basis of a conventional unit, and the auxiliary heat exchanger adopts a shell-and-tube heat exchanger or a plate heat exchanger.

There are steam heat exchange tubes inside the generator.

The vacuum trap described above is used to prevent pressure communication between the condenser and the evaporator.

Beneficial effects of the utility model patent: 1. The heat of exhausted steam can be recovered, the utilization rate of the heat source can be improved, and the consumption of the heat source can be saved. 2. For the heat of exhausted steam, recover the heat of exhausted steam, reduce or replace it through the cooling tower, reduce the heat lost to the atmosphere, reduce heat pollution, reduce the impact on the environment, and help protect the environment.

Taking the cycle standard design working condition of the utility model as an example, it solves the disadvantage that it cannot be used in summer before, improves the utilization rate of heat sources, reduces or replaces the use of cooling towers, reduces environmental heat pollution, and reduces energy consumption. In today's society facing serious environmental pollution and energy shortage, the utility model can better adapt to the global development situation of reducing CO ₂ and reducing energy consumption, which is beneficial to energy saving and consumption reduction of enterprises and countries, and sustainable development. It should have a good Prospects.

Description of drawings

Fig. 1 is a schematic flow chart of the circulation principle of the utility model.

In the figure: 1. Evaporator; 2. Absorber; 3. Condenser; 4. Generator; 5. Heat exchanger; 6. Auxiliary heat exchanger; 7. Refrigerant pump; 8. Dilute solution pump; 9. Concentrated solution pump; 10. Vacuum trap; 11. Condenser; 12. Heat source water outlet; 13. Heat source water inlet; 14. Liquid blocking device Ⅰ; 15. Pipeline Ⅰ; 16. Pipeline Ⅱ; 18. Pipeline Ⅳ; 19. Pipeline Ⅴ; 20. Liquid blocking device Ⅱ; 21. Hot water pipe; 22. Steam turbine output pipeline; 23. Steam heat exchange pipe.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

As shown in Figure 1, the lithium bromide absorption type heat source unit of the present utility model includes an evaporator 1, an absorber 2, a generator 4, a condenser 3, a hot water pipe 21, a steam turbine output pipeline 22, and a heat source water inlet of the utility model. 13. Heat source water outlet 12, condenser 11, hot water pipe 21, evaporator 1 communicates with absorber 2, generator 4 communicates with condenser 3, and the bottom of absorber 2 communicates with generator 4 through pipe IV18 , the bottom end of the generator 4 communicates with the top end of the absorber 2 through the pipe III17, and also includes the main heat exchanger 5 and the auxiliary heat exchanger 6, and the hot water pipe 21 passes through the absorber 2, the condenser 3, and the auxiliary heat exchanger 6 in sequence, Both pipeline III17 and pipeline IV18 are connected to the main heat exchanger 5 and exchange heat through the main heat exchanger 5; 1. The other end of the heat source water outlet 12 is respectively connected to the condenser 11. After the steam turbine output pipeline 22 passes through the condenser 11, it is respectively connected to the auxiliary heat exchanger 6 with the hot water pipe 21 protruding from the condenser 3 and passed through the auxiliary heat exchanger. The exchanger 6 exchanges heat.

The bottom end of the evaporator 1 communicates with the top end of the evaporator 1 through the refrigerant pump 7 and the pipeline II16 in sequence.

The evaporator 1 communicates with the bottom end of the condenser 3 through the vacuum trap 10 and the pipeline I15 in turn.

A dilute solution pump 8 is provided on the pipeline IV18.

Concentrated solution pump 9 is provided on pipeline III17.

The evaporator 1 communicates with the absorber 2 through the liquid blocking device II20.

The generator 4 communicates with the condenser 3 through the liquid blocking device I14.

The main heat exchanger 5 adopts a shell-and-tube heat exchanger or a plate heat exchanger.

The auxiliary heat exchanger 6 adopts a shell-and-tube heat exchanger or a plate heat exchanger.

A steam heat exchange tube 23 is arranged inside the generator 4 .

When the unit is running, the heat source water flows in the hot water pipe 21 of the evaporator 1, and the refrigerant water condensed in the condenser 3 enters the evaporator 1 after being throttled by the vacuum trap 10, and the refrigerant water in the evaporator 1 Powered by the refrigerant pump 7, it drips on the hot water pipe 21 of the evaporator 1 to absorb the heat of the heat source water in the pipe and evaporates; the heat source water is sent to the condenser 11 to cool the exhaust steam generated by the steam turbine after the temperature of the heat source water is lowered.

The refrigerant water evaporates into refrigerant vapor, enters the absorber 2, and is absorbed by the concentrated solution dripping on the hot water pipe 21 of the absorber 2, and the concentrated solution becomes a dilute solution, while the hot water pipe 21 in the absorber 2 The circulating hot water takes away the heat of absorption in the absorber 2; the dilute solution in the absorber 2 is sent to the heat exchanger 5 by the dilute solution pump 8, where it exchanges heat with the concentrated solution output from the generator 4, and then transports to generator 4. The dilute solution is heated by the heat source in the steam heat exchange tube 23 in the generator 4 and concentrated into a concentrated solution; the heat source in the steam heat exchange tube 23 comes out from the generator 4 and returns directly to the steam boiler. The concentrated solution is transported by the concentrated solution pump 9 through the heat exchanger 5. After the temperature drops, it enters the absorber 2, drips on the hot water pipe 21 of the absorber 2, absorbs the refrigerant water vapor from the evaporator 1, and becomes a dilute solution , to complete the main circulation of the solution in the heating process.

On the other hand, the hot water in the hot water pipe 21 exchanges heat with the exhaust steam condensate treated by the condenser 11 in the auxiliary heat exchanger 6 , and enters the absorber 2 after the temperature drops. During the operation of the unit, the heat source enters the steam heat exchange tube 23 in the generator 4, and the hot water enters the absorber 2, the condenser 3, and the auxiliary heat exchanger 6 sequentially through the hot water tube 21, and the heat source water enters the heat source water inlet 13 The pipe V19 that enters the evaporator 1 flows out from the outlet 12 of the heat source water.

The hot water that comes out from the condenser hot water pipe 21 can be connected to the heating equipment for heating.

Claims (10)

1. A lithium bromide absorption type I heat pump unit shared in winter and summer, including an evaporator (1), an absorber (2), a generator (4), a condenser (3), a hot water pipe (21), and a steam turbine output pipe (22), heat source water inlet (13), heat source water outlet (12), condenser (11), hot water pipe (21), evaporator (1) communicated with absorber (2), generator (4 ) communicates with the condenser (3), the bottom end of the absorber (2) communicates with the generator (4) through the pipeline IV (18), and the bottom end of the generator (4) communicates with the absorber (2) through the pipeline III (17) The top is connected, and it is characterized in that it also includes a main heat exchanger (5), an auxiliary heat exchanger (6), and the hot water pipe (21) passes through the absorber (2), condenser (3), auxiliary heat exchanger ( 6), pipeline III (17) and pipeline IV (18) are connected to the main heat exchanger (5) and exchange heat through the main heat exchanger (5); the heat source water inlet (13) and the heat source water outlet (12) are respectively connected to The two ends of the pipe V (19) arranged in the evaporator (1) are connected, the other ends of the heat source water inlet (13) and the heat source water outlet (12) are respectively connected with the condenser (11), and the steam turbine output pipe (22) After passing through the condenser (11), it is respectively connected to the auxiliary heat exchanger (6) with the hot water pipe (21) protruding from the condenser (3) and exchanges heat through the auxiliary heat exchanger (6). 2. The lithium bromide absorption type I heat pump unit shared in winter and summer according to claim 1, characterized in that the bottom of the evaporator (1) passes through the refrigerant pump (7), pipeline II (16) and evaporator (1) in sequence The top is connected. 3. The lithium bromide absorption type I heat pump unit shared in winter and summer according to claim 2, characterized in that the evaporator (1) passes through the vacuum trap (10), pipeline I (15) and the bottom of the condenser (3) in sequence connected. 4. The lithium bromide absorption type I heat pump unit shared by winter and summer according to claim 1, characterized in that a dilute solution pump (8) is provided on pipeline IV (18). 5. The lithium bromide absorption type I heat pump unit shared by winter and summer according to claim 1, characterized in that the pipe III (17) is provided with a concentrated solution pump (9). 6. The lithium bromide absorption type I heat pump unit shared by winter and summer according to claim 1, characterized in that the evaporator (1) and the absorber (2) are connected through the liquid blocking device II (20). 7. The lithium bromide absorption type I heat pump unit shared by winter and summer according to claim 1, characterized in that the generator (4) communicates with the condenser (3) through the liquid blocking device I (14). 8. The lithium bromide absorption type I heat pump unit shared by winter and summer according to claim 1, characterized in that the main heat exchanger (5) adopts a shell-and-tube heat exchanger or a plate heat exchanger. 9. The winter-summer shared lithium bromide absorption type I heat pump unit according to claim 1, characterized in that the auxiliary heat exchanger (6) adopts a shell-and-tube heat exchanger or a plate heat exchanger. 10. The lithium bromide absorption type I heat pump unit shared by winter and summer according to claim 1, characterized in that steam heat exchange tubes (23) are arranged inside the generator (4).

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