CN112361650A - Opening-closing type integrated heat pump device and application thereof - Google Patents
Opening-closing type integrated heat pump device and application thereof Download PDFInfo
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- CN112361650A CN112361650A CN202011250585.4A CN202011250585A CN112361650A CN 112361650 A CN112361650 A CN 112361650A CN 202011250585 A CN202011250585 A CN 202011250585A CN 112361650 A CN112361650 A CN 112361650A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/04—Heat pumps of the sorption type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
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Abstract
An open-close type integrated heat pump device comprises a spraying system; the first heat absorption system and the spraying system form a loop; the second heat absorption system and the spraying system form a loop and are communicated with the first absorption system; the first heat absorption system and the second heat absorption system are in heat transfer with the spraying system; the spraying system comprises a spraying tower, a partition plate is arranged inside the spraying tower, the lower part of the gas lifting device is a spraying tower section A, the upper part of the gas lifting device is a spraying tower section B, a first spraying device and a second spraying device are respectively arranged inside the spraying tower section A and the spraying tower section B, through treatment of waste gas, heat in the waste gas can be recovered more, the dry bulb temperature of the waste gas is greater than the dew point temperature, the lifting force of the waste gas is increased, the corrosion of the waste gas to the spraying system is reduced, and the service life of the spraying system is prolonged.
Description
Technical Field
The invention belongs to the technical field of heat pump systems, and particularly relates to an open-close type integrated heat pump device and application thereof.
Background
The heat pump is a high-efficiency energy-saving device which makes full use of low-grade heat energy. Heat can be transferred spontaneously from a high temperature object to a low temperature object, but cannot proceed spontaneously in the opposite direction. The working principle of the heat pump is a mechanical device which forces heat to flow from a low-temperature object to a high-temperature object in a reverse circulation mode, and the heat pump can obtain larger heat supply amount only by consuming a small amount of reverse circulation net work, and can effectively utilize low-grade heat energy which is difficult to apply to achieve the purpose of energy conservation. At present, waste heat recovery devices are mostly installed in damp and hot waste gas emission enterprises, and energy-saving devices such as a dividing wall type heat exchanger, an open type absorption heat pump, a closed type absorption heat pump and the like are mainly used for carrying out waste heat recovery on damp and hot waste gas. Traditional dividing wall type heat exchanger equipment is corroded by waste gas easily in the in-process that uses, and life is than short to the heat transfer effect between damp and hot waste gas and the heat transfer medium is relatively poor, and the result of use is less than ideal. The open absorption heat pump takes away the waste heat in the damp and hot waste gas through the continuous input and output of the working medium, mainly recovers heat through absorbing moisture in the flue gas, and has no evaporator, so that the dew point of the flue gas is difficult to be reduced to below 35 ℃, and the waste heat of the flue gas cannot be fully recovered. The closed heat pump can reduce the dew point of the flue gas to be below 30 ℃, can fully recover the waste heat in the flue gas, but the flue gas outlet temperature adopting the technology is low, the saturation is high, the lifting force of the flue gas can be reduced, and the corrosion of a chimney can be aggravated.
Disclosure of Invention
In order to solve the above-mentioned technology, a first aspect of the present invention provides an open-close type integrated heat pump apparatus, including a spray system; the first heat absorption system and the spraying system form a loop; the second heat absorption system and the spraying system form a loop and are communicated with the first absorption system; the first heat absorption system and the second heat absorption system are in heat transfer with the spraying system; the spraying system comprises a spraying tower, a gas lifting device is arranged in the spraying tower, the lower part of the gas lifting device is a spraying tower section A, the upper part of the gas lifting device is a spraying tower section B, a first spraying device and a second spraying device are respectively arranged in the spraying tower section A and the spraying tower section B, the bottom of the spraying tower section A is respectively provided with a gas inlet and a first working medium outlet, the bottom of the spraying tower section B is provided with a second working medium outlet, the top of the spraying tower section B is provided with a gas outlet, the first heat absorption system and the spraying tower section A form a loop, and the second heat absorption system and the spraying tower section B form a loop.
Preferably, the first heat absorption system comprises a low-pressure evaporator, the low-pressure evaporator is communicated with the first spraying device, a working medium inlet, a working medium outlet, a condensate outlet, a tertiary steam outlet and a secondary steam condensate inlet are formed in the low-pressure evaporator, the working medium inlet is communicated with the first working medium outlet through a pipeline, and the working medium outlet is communicated with the first spraying device through a pipeline.
Preferably, the second heat absorption system comprises a second working medium storage tank for storing a second working medium; the second working medium external circulation system is communicated with the second working medium storage tank; the second working medium absorption circulating system is communicated with the second working medium storage tank; and one side of the self-circulation heat exchanger is communicated with the second spraying device, the other side of the self-circulation heat exchanger is communicated with the second working medium storage tank, and the self-circulation heat exchanger heats the cold medium.
Preferably, the second working medium external circulation system comprises a heat regenerator, and one side of the heat regenerator is communicated with the second working medium storage tank; one side of the high-pressure evaporator is communicated with the other side of the heat regenerator; one side of the separator is communicated with the high-pressure evaporator, and the bottom of the separator is communicated with the heat regenerator; the secondary steam condenser is communicated with the separator, the low-pressure evaporator and the self-circulation heat exchanger; and the secondary steam condenser heats the cold medium flowing out of the self-circulation heat exchanger.
Preferably, the high-pressure evaporator is connected with a driving steam system.
Preferably, a throttle valve is arranged between the secondary steam condenser and the low-pressure evaporator.
Preferably, the second working medium absorption circulating system comprises a second working medium cooler, and the second working medium cooler is communicated with a second working medium storage tank; the first throttling valve is communicated with the second working medium cooler; and the low-pressure steam absorber is communicated with the first throttling valve, the second working medium storage tank and the low-pressure evaporator.
Preferably, one side of the second working medium cooler is communicated with the self-circulation heat exchanger, the other side of the second working medium cooler is connected with a cold medium supply system, the second working medium cooler heats the cold medium in the cold medium supply system, and the heated cold medium is introduced into the self-circulation heat exchanger.
Preferably, the second working medium is a hygroscopic solution, the solvent of the hygroscopic solution is liquid water, the solute of the hygroscopic solution is inorganic salt and/or organic matter, and the mass concentration of the hygroscopic solution is 20-70%.
Preferably, the inorganic salt is at least one selected from the group consisting of sodium bromide, lithium chloride and calcium chloride, and the organic substance is at least one selected from the group consisting of potassium oxalate, ethylene glycol, glycerol and triethylene glycol.
The open-close type integrated heat pump device provided by the invention is applied to the utilization of the waste heat of damp and hot waste gas.
Has the advantages that: according to the invention, waste heat in the waste gas is recycled through the section A of the spray tower and the section B of the spray tower, the heat absorbed by the first working medium in the section A of the spray tower is converted into tertiary steam through the installation of the low-pressure evaporator, the tertiary steam is absorbed by the second working medium, the heat is transferred into the second working medium, the heat is transferred to the cold medium by the second working medium, the temperature of the cold medium is raised, and the heat absorbed by the first working medium in the section A of the spray tower is more recycled through the installation of the low-pressure evaporator, so that the temperature of the waste gas is reduced. The second working medium directly contacts with waste gas in the section B of the spray tower, harmful gas and dust in the waste gas can be absorbed, the emission of harmful substances in the waste gas is reduced, a certain whitening effect is achieved on the waste gas, the dry bulb temperature of the waste gas treated by the section B of the spray tower is greater than the dew point temperature, the lifting force of the waste gas is increased, the corrosion of the waste gas to a spray system is reduced, and the service life of the spray system is prolonged.
Drawings
Fig. 1 is a schematic view of the overall flow in example 1.
Fig. 2 is a schematic view of the overall flow in comparative example 2.
1-section A of a spray tower, 2-steam condensate outlet, 3-gas inlet, 4-first working medium outlet, 5-high pressure evaporator, 6-first spray device, 7-section B of the spray tower, 8-second spray device, 9-gas outlet, 10-cold medium second inlet, 11-self-circulation heat exchanger, 12-cold medium second outlet, 13-hot medium outlet, 14-hot medium inlet, 15-first inlet, 16-first outlet, 17-second inlet, 18-second working medium storage tank, 19-third outlet, 20-third inlet, 21-seventh inlet, 22-eighth outlet, 23-second working medium cooler, 24-eighth inlet, 25-cold medium feeding system, 26-seventh outlet, 27-a first throttling valve, 28-a ninth inlet, 29-a ninth outlet, 30-a low-pressure steam absorber, 31-a third steam inlet, 32-a working medium inlet, 33-a working medium outlet, 34-a low-pressure evaporator, 35-a condensed water outlet, 36-a second steam condensate inlet, 37-a third steam outlet, 38-a fourth inlet, 39-a fourth outlet, 40-a heat regenerator, 41-a fifth outlet, 42-a fifth inlet, 43-a separator, 44-a liquid outlet, 45-a second steam outlet, 46-a second steam inlet, 47-a sixth inlet, 48-a second steam condenser, 49-a sixth outlet, 50-a second steam condensate outlet, 51-a gas-liquid mixture inlet, 52-a gas-liquid mixture outlet, 53-driving steam inlet, 54-solution inlet, 55-air lifting device, 56-driving steam system, 57-second outlet, 58-second working medium outlet, 59-demister, 60-throttle valve, 61-absorber, 62-generator, 63-condenser, 64-pressure reducing valve, 65-heating water first inlet, 66-heating water second inlet and 67-heating water outlet.
Detailed Description
The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
In addition, the starting materials used are all commercially available, unless otherwise specified.
Example 1
As shown in fig. 1, the present embodiment provides an open-close type integrated heat pump apparatus, including a spray system; the first heat absorption system and the spraying system form a loop; the second absorption heat system and the spraying system form a loop and are communicated with the first absorption system; the spraying system is respectively in heat transfer with the first heat absorption system and the second heat absorption system, the waste gas in the embodiment is damp and hot waste gas, and the cold medium in the embodiment is heating water.
The spraying system comprises a spraying tower, an air lifting device 55 is arranged inside the spraying tower, the lower portion of the air lifting device 55 is a spraying tower section A1, the upper portion of the air lifting device 55 is a spraying tower section B7, a first spraying device 6 is installed at the top of the spraying tower section A1, and a filler is placed below the first spraying device 6 and used for increasing the contact area of gas and liquid. The first spraying device 6 comprises a first spraying head, and the bottom of the section A1 of the spraying tower is respectively provided with a gas inlet 3 and a first working medium outlet 4. The first heat absorption system comprises a low-pressure evaporator 34, the low-pressure evaporator 34 is communicated with a first spraying device 6 through a pipeline, the low-pressure evaporator 34 provides a first working medium for absorbing heat for the section A1 of the spraying tower through the first spraying device 6, and the first working medium in the embodiment is tap water. The low-pressure evaporator 34 is provided with a working medium inlet 32, a working medium outlet 33, a condensed water outlet 35, a tertiary steam outlet 37 and a secondary steam condensed water inlet 36.
Waste gas enters the section A of the spray tower from the gas inlet 9, the first spray header sprays a first working medium, the first working medium is in contact with the waste gas, the heat in the absorbed waste gas flows to the bottom of the tower, water vapor in the waste gas meets the first working medium and is condensed into water, and the condensed water and the first working medium flow to the bottom of the tower together and then enter the low-pressure evaporator 34 through the first working medium outlet 4 and the working medium inlet 32. The heat of the first working medium is used for converting the condensed water part of the secondary steam into tertiary steam in the low-pressure evaporator 34, the first working medium which releases the heat returns to the first spraying device 6 through the working medium outlet 33, and is sprayed into the section 1 of the spraying tower A by the first spraying head to continuously absorb the heat; the waste gas is changed into wet saturated waste gas after contacting with the first working medium, and the wet saturated waste gas continuously rises through the gas lifting device 55 and enters the section 7 of the spray tower B. The middle part of the spray tower B section 7 is provided with a second spray device 8, the second spray device 8 comprises a second spray head, a demister 59 for demisting is arranged between the second spray device 8 and the top of the spray tower B section 7, and the demister 59 can reduce the corrosion of waste gas to the spray tower B section. And a filler for increasing the gas-liquid contact area is placed below the second spraying device 8, a second working medium outlet 58 is formed at the bottom of the section B7 of the spraying tower, and a gas outlet 9 is formed at the top of the section B7 of the spraying tower. The second heat absorption system comprises a second working medium storage tank 18 for storing a second working medium, a self-circulation heat exchanger 11 communicated with the second working medium storage tank 18, a second working medium external circulation system communicated with the second working medium storage tank 18, and a second working medium absorption circulation system communicated with the second working medium storage tank 18, wherein the self-circulation heat exchanger 11 is communicated with the second spraying device 8. The second working medium in this embodiment is a hygroscopic solution, a solvent of the hygroscopic solution is liquid water, a solute of the hygroscopic solution is calcium chloride, and a mass concentration of the calcium chloride solution is 45%. The second working medium storage tank 18 is provided with a first outlet 16, a first inlet 15, a second outlet 57, a second inlet 17, a third outlet 19 and a third inlet 20. The self-circulation heat exchanger 11 is provided with a heat medium inlet 14, a heat medium outlet 13, a cold medium second inlet 10 and a cold medium second outlet 12, the second working medium flows out from a first outlet 16 in a second working medium storage tank 18, enters the self-circulation heat exchanger 11 through the heat medium inlet 14 of the self-circulation heat exchanger 11, enters the second spraying device 8 through the heat medium outlet 13 of the self-circulation heat exchanger 11, is sprayed out through a second spraying head, is contacted with the waste gas in the section B of the spraying tower, the water vapor in the waste gas is absorbed by the second working medium, the water vapor releases heat when being absorbed, most of the released heat is absorbed by the second working medium, and a small part of the released heat is absorbed by the waste gas. The temperature rises after the second working medium contacts with the waste gas, but the concentration is reduced, the second working medium can also absorb harmful gas and dust in the waste gas, and can also make the gas whiten, the second working medium returns to the bottom of the section B7 of the spray tower and flows into the second working medium storage tank 18 from the second working medium outlet 58, the temperature of the dry ball rises after the waste gas absorbs and removes water vapor to absorb a small part of heat, and the dry waste gas is changed into dry waste gas and is discharged from the gas outlet 9. The dry bulb temperature of the waste gas treated by the section B of the spray tower is higher than the dew point temperature, so that the lifting force of the waste gas is increased, the corrosion of the waste gas to a spray system is reduced, and the service life of the spray system is prolonged. The second working medium external circulation system comprises a heat regenerator 40, a high-pressure evaporator 5, a separator 43 and a secondary steam condenser 48, wherein the heat regenerator 40 is respectively communicated with the second working medium storage tank 18, the high-pressure evaporator 5 and the separator 43, and the heat regenerator 40 comprises a fourth inlet 38, a fourth outlet 39, a fifth inlet 42 and a fifth outlet 41. The high-pressure evaporator 5 is communicated with the separator 43, the high-pressure evaporator 5 is connected with a driving steam system 56 through a pipeline, the driving steam system 56 provides high-temperature steam for the high-pressure evaporator 5, the high-temperature steam is used for evaporating and concentrating a second working medium, the high-pressure evaporator 5 comprises a solution inlet 54, a gas-liquid mixture outlet 53, a driving steam inlet 53 and a steam condensate outlet 2, the separator 43 is communicated with the secondary steam condenser 48, and the separator 43 comprises a secondary steam outlet 45, a gas-liquid mixture inlet 51 and a liquid outlet 44. The secondary steam condenser 48 is communicated with the low-pressure evaporator 34, a throttle valve 60 is connected between the secondary steam condenser 48 and the low-pressure evaporator 34, and the secondary steam condenser 48 comprises a secondary steam inlet 46, a secondary steam condensate outlet 50, a sixth inlet 47 and a sixth outlet 49.
The second working medium in the second working medium storage tank 18 flows into the heat regenerator 40 through the second outlet 57 and the fourth inlet 38, flows into the high pressure evaporator 5 through the fourth outlet 39 and the solution inlet 54 after being heated for the first time by the heat regenerator 40, and drives the steam to flow into the high pressure evaporator 5 through the driving steam inlet 53. The second working medium is heated for the second time under the action of the driving steam to form a gas-liquid mixture, the gas-liquid mixture flows into the separator 43 from the gas-liquid mixture outlet 52 and the gas-liquid mixture inlet 51, the driving steam is cooled after releasing heat to form steam condensate, and the steam condensate is discharged out of the high-pressure evaporator 5 through the steam condensate outlet 2. The gas-liquid mixture is separated into secondary steam and liquid in the separator 43, the second working medium is concentrated after passing through the high-pressure evaporator, the concentrated liquid enters the heat regenerator 40 through the liquid outlet 44 and the fifth inlet 42 to heat the second working medium passing through the heat regenerator 40, flows out of the heat regenerator 40 through the fifth outlet 41, and flows into the second working medium storage tank 18 through the second inlet 17. The secondary steam enters the secondary steam condenser 48 through the secondary steam outlet 45 and the secondary steam inlet 46 to heat the cooling medium, and when the secondary steam heats the cooling medium, the secondary steam emits heat and is condensed into secondary steam condensate. The secondary steam condensate flows into the throttling valve 60 through the secondary steam condensate outlet 50, throttling and pressure reduction are carried out in the throttling valve 60, the secondary steam condensate enters the low-pressure evaporator 34 through the throttling valve 60 and the secondary steam condensate inlet 36, the secondary steam condensate absorbs heat in the first working medium to generate part of low-pressure tertiary steam, and the secondary steam condensate which is not converted into the low-pressure tertiary steam is discharged through the condensate outlet 35. The second working medium absorption circulation system comprises a second working medium cooler 23 communicated with the second working medium storage tank 18, a first throttling valve 27 communicated with the second working medium cooler 23 and a low-pressure steam absorber 30, wherein the low-pressure steam absorber 30 is respectively communicated with the first throttling valve 27 and the second working medium storage tank 18. The second working medium cooler 23 comprises a seventh inlet 21, a seventh outlet 26, an eighth inlet 24 and an eighth outlet 22, the second working medium cooler 23 is communicated with a cold medium supply system through the eighth inlet, cold medium supply is provided to provide cold medium for the second working medium cooler 23, and the cold medium in the embodiment is heating water. The low-pressure steam absorber 30 comprises a ninth inlet 28, a ninth outlet 29 and a tertiary steam inlet 31, a second working medium flows into the second working medium cooler 23 through the third outlet 19 and the seventh inlet 21, the second working medium is cooled by the heating water in the second working medium cooler 23, so that the temperature of the heating water is increased, the cooled second working medium flows into the first throttling valve 27 through the seventh outlet 26 to be subjected to pressure reduction and throttling, and the cooled second working medium flows into the low-pressure steam absorber 30 through the ninth inlet 28 after being subjected to pressure reduction and throttling. Because the partial pressure of the steam of the second working medium is very low, the tertiary steam is absorbed by the second working medium when flowing into the low-pressure steam absorber 30 through the tertiary steam inlet 31, the concentration of the second working medium is reduced, and then the tertiary steam flows into the second working medium storage tank 19 through the ninth outlet 29 and the third inlet 20 to continuously absorb the heat in the waste gas and release the heat of the tertiary steam. After being heated by the second working medium in the second working medium cooler 23, the cold medium, namely the heating water flows into the self-circulation heat exchanger 11 through the eighth outlet 22 and the second cold medium inlet 10, the cold medium is heated again by the second working medium in the self-circulation heat exchanger 11, the heated cold medium flows out of the self-circulation heat exchanger 11 through the second cold medium outlet 12, the cold medium flows into the secondary steam condenser 48 through the sixth inlet 47, the cold medium is heated by the secondary steam in the secondary steam condenser 48, and the reheated cold medium flows out of the system through the sixth outlet 49.
Comparative example 1
The comparative example differs from example 1 in that the second working medium cooler, the first throttle valve, the low-pressure steam absorber and the low-pressure evaporator are not included in this example. In the embodiment, the first working medium flows out through the first working medium outlet and then flows into the heat exchanger, the cold medium supply system is communicated with the heat exchanger, the cold medium in the embodiment is heating water, the first working medium heats the cold medium in the heat exchanger, and then the first working medium flows into the A section of the spray tower to continuously absorb heat in the waste gas. The cooling medium heated in the heat exchanger, i.e., heating water, was then introduced into the self-circulating heat exchanger under the same conditions as in example 1.
Comparative example 2
As shown in fig. 2, this comparative example differs from example 1 in that it includes a spray tower a section 1, a low-pressure evaporator 34 communicating with the spray tower a section, an absorber 61 communicating with the low-pressure evaporator 34, a regenerator 40 communicating with the absorber 61, an expander 62 communicating with the regenerator 40, a condenser 63 communicating with the generator 62, a pressure reducing valve 64 communicating with the condenser 63, and the pressure reducing valve 64 communicating with the low-pressure evaporator 34. Waste enters the spraying tower through the bottom of the section 1 of the spraying tower A, the heat in the waste gas is recovered by spraying tap water in the tower, the sprayed waste gas is discharged out of the tower through the top of the section A of the spraying tower, the tap water sprayed to the bottom of the tower flows into the low-pressure evaporator 34 through a pipeline, steam formed in the low-pressure evaporator 34 is introduced into the absorber 61 through a pipeline, the absorber 61 is filled with a second working medium solution, the second working medium solution absorbing water vapor is changed into a dilute solution and flows into the heat regenerator 40 through a pipeline, the dilute solution flowing into the generator 62 is introduced into the generator 62 through the heat regenerator 40, the external driving steam is introduced into the generator 62 to evaporate the dilute solution flowing into the generator 62, the steam formed by evaporation is introduced into the condenser 63 through a pipeline, is introduced into the pressure reducing valve 64 after being condensed into condensed water in the condenser 63, and finally flows back into the low-pressure evaporator 34 through a pipeline from the pressure reducing valve 64, and the tap water in the low-pressure evaporator is introduced into the spraying device through a pipeline to spray the flue gas in the section A1 of the spraying tower. The weak solution is concentrated in the generator to a strong solution, which flows through the regenerator 40 into the absorber 61. The external heating water flows into the absorber 61 through the heating water first inlet 65, absorbs the heat in the second working medium solution, flows out of the absorber 61 by the first heating water, then flows into the condenser 63 through the heating water second inlet 66, absorbs the heat of the steam in the condenser 63, is heated for the second time, and then flows out of the condenser 63 through the heating water outlet 67.
And (3) performance testing:
the process systems of the embodiment 1, the comparative example 1 and the comparative example 2 are subjected to performance tests, the spray towers of the embodiment 1, the comparative example 1 and the comparative example 2 are 11 meters in diameter, the fillers of the spray towers are the same, the heights of seasonings are 6 meters, the spraying amount of the first working medium is 2000 cubic meters, the first working medium is tap water, the spraying amount of the second working medium is 2000 cubic meters, the second working medium is 45 wt% of calcium chloride solution, the initial temperature of a cold medium is 40 +/-4 ℃, the treatment results of the embodiment 1, the comparative example 1 and the comparative example 2 are measured and calculated, and the performance evaluation of waste heat recovery is carried out.
From the above test data, it can be seen that more waste heat in the waste gas can be recovered through the waste gas treatment in the embodiment 1, the temperature of the waste gas can be lowered, the dry bulb temperature of the waste gas is higher than the dew point temperature, the lifting force of the waste gas is increased, the corrosion of the waste gas to the spraying system is reduced, and the service life of the spraying system is prolonged.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may modify or change the technical content of the above disclosure into equivalent embodiments with equivalent changes, but all those simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the present invention.
Claims (10)
1. An open-close type integrated heat pump device is characterized by comprising a spraying system; the first heat absorption system and the spraying system form a loop; the second heat absorption system and the spraying system form a loop and are communicated with the first absorption system; the first heat absorption system and the second heat absorption system are in heat transfer with the spraying system; the spraying system comprises a spraying tower, a gas lifting device is arranged in the spraying tower, the lower part of the gas lifting device is a spraying tower section A, the upper part of the gas lifting device is a spraying tower section B, a first spraying device and a second spraying device are respectively arranged in the spraying tower section A and the spraying tower section B, the bottom of the spraying tower section A is respectively provided with a gas inlet and a first working medium outlet, the bottom of the spraying tower section B is provided with a second working medium outlet, the top of the spraying tower section B is provided with a gas outlet, the first heat absorption system and the spraying tower section A form a loop, and the second heat absorption system and the spraying tower section B form a loop.
2. The open-close type integrated heat pump device according to claim 1, wherein the first heat absorption system comprises a low pressure evaporator, the low pressure evaporator is communicated with the first spraying device, the low pressure evaporator is provided with a working medium inlet, a working medium outlet, a condensed water outlet, a tertiary steam outlet and a secondary steam condensed water inlet, the working medium inlet is communicated with the first working medium outlet through a pipeline, and the working medium outlet is communicated with the first spraying device through a pipeline.
3. The open-closed, integrated heat pump apparatus of claim 2, wherein the second heat absorption system comprises a second working fluid storage tank storing a second working fluid; the second working medium external circulation system is communicated with the second working medium storage tank; the second working medium absorption circulating system is communicated with the second working medium storage tank; and one side of the self-circulation heat exchanger is communicated with the second spraying device, the other side of the self-circulation heat exchanger is communicated with the second working medium storage tank, and the self-circulation heat exchanger heats the cold medium.
4. The open-closed integrated heat pump device according to claim 3, wherein the second working medium external circulation system comprises a regenerator, one side of which is communicated with the second working medium storage tank; one side of the high-pressure evaporator is communicated with the other side of the heat regenerator; one side of the separator is communicated with the high-pressure evaporator, and the bottom of the separator is communicated with the heat regenerator; the secondary steam condenser is communicated with the separator, the low-pressure evaporator and the self-circulation heat exchanger; and the secondary steam condenser heats the cold medium flowing out of the self-circulation heat exchanger.
5. The open-closed, integrated heat pump apparatus according to claim 4, wherein a drive steam system is connected to the high-pressure evaporator.
6. The open-closed integrated heat pump device according to claim 5, wherein the second working medium absorption cycle system comprises a second working medium cooler, and the second working medium cooler is communicated with a second working medium storage tank; the first throttling valve is communicated with the second working medium cooler; and the low-pressure steam absorber is communicated with the first throttling valve, the second working medium storage tank and the low-pressure evaporator.
7. The open-close type integrated heat pump device according to claim 6, wherein one side of the second working medium cooler is communicated with the self-circulation heat exchanger, the other side of the second working medium cooler is connected with a cold medium feeding system, the second working medium cooler heats the cold medium in the cold medium feeding system, and the heated cold medium is introduced into the self-circulation heat exchanger.
8. The open-close type integrated heat pump device according to any one of claims 3 to 7, wherein the second working medium is a hygroscopic solution, a solvent of the hygroscopic solution is liquid water, a solute of the hygroscopic solution is an inorganic salt and/or an organic substance, and a mass concentration of the hygroscopic solution is 20 to 70%.
9. The on-off integrated heat pump device according to claim 9, wherein the inorganic salt is at least one selected from the group consisting of sodium bromide, lithium chloride and calcium chloride, and the organic substance is at least one selected from the group consisting of potassium oxalate, ethylene glycol, glycerin and triethylene glycol.
10. An open-close type integrated heat pump device according to any one of claims 1 to 9, applied to the utilization of waste heat of damp and hot exhaust gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011250585.4A CN112361650B (en) | 2020-11-10 | 2020-11-10 | Opening-closing type integrated heat pump device and application thereof |
Applications Claiming Priority (1)
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