CN108518885B - Environment-friendly efficient smoke hot water type lithium bromide absorption type cold and hot water unit - Google Patents
Environment-friendly efficient smoke hot water type lithium bromide absorption type cold and hot water unit Download PDFInfo
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- CN108518885B CN108518885B CN201810309249.9A CN201810309249A CN108518885B CN 108518885 B CN108518885 B CN 108518885B CN 201810309249 A CN201810309249 A CN 201810309249A CN 108518885 B CN108518885 B CN 108518885B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 104
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 title claims abstract description 46
- 239000000779 smoke Substances 0.000 title claims abstract description 36
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 23
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 173
- 239000003546 flue gas Substances 0.000 claims abstract description 173
- 238000010438 heat treatment Methods 0.000 claims abstract description 104
- 239000002918 waste heat Substances 0.000 claims abstract description 8
- 239000003507 refrigerant Substances 0.000 claims description 39
- 239000006096 absorbing agent Substances 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- 239000002826 coolant Substances 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 5
- 238000007791 dehumidification Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 238000009834 vaporization Methods 0.000 claims description 2
- 230000008016 vaporization Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 3
- 239000000463 material Substances 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000008236 heating water Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
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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
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
- Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention relates to an environment-friendly high-efficiency smoke hot water type lithium bromide absorption type cold and hot water unit, which is characterized in that: the unit is characterized in that a smoke heat exchanger (18) is arranged on a smoke exhaust pipe of the smoke high-pressure generator (1), and a smoke solution heat exchanger (29) and a smoke solution inlet heat exchanger dilute solution pipeline (30) and a smoke solution outlet heat exchanger dilute solution pipeline (31) are additionally arranged. When the refrigerating working condition is running, the dilute solution enters the flue gas solution heat exchanger to recycle the flue gas waste heat, and the flue gas is discharged after the temperature of the released heat of the flue gas is reduced. When the heating working condition is running, the low-temperature circulating water of the heating evaporator enters the flue gas heat exchanger to recycle the flue gas waste heat, the dilute solution enters the flue gas solution heat exchanger to heat the normal-temperature flue gas, and the flue gas with reduced relative humidity absorbs heat and is discharged after the temperature rise. The chimney of the invention can be made of conventional materials without special requirements, can effectively eliminate white smoke, simultaneously recover smoke heat, improve the comprehensive utilization rate of the whole system energy, reduce thermal pollution and protect the environment.
Description
Technical Field
The invention relates to a smoke hot water type lithium bromide absorption type cold and hot water unit. Belongs to the technical field of air conditioning equipment.
Background
At present, in the application fields of natural gas distributed power generation and industrial kilns, the temperature of flue gas discharged by a gas generator set and the industrial kilns is higher (about 400 ℃), the heat taken away by the flue gas and the proportion of the heat taken away by the flue gas to the energy consumption are larger, and the flue gas hot water type lithium bromide absorption type cold and hot water unit technology is popularized and applied in some occasions for recycling the waste heat of the flue gas and the waste heat of heat source water (namely engine high-temperature cooling water), so that the comprehensive utilization rate of energy sources is improved, and the environmental pollution is reduced.
The fume hot water type lithium bromide absorbing cold and hot water machine set is one equipment with fume and heat source water as driving heat source, water as refrigerant and lithium bromide aqua as absorbent and through vacuum process. The flue gas hot water type lithium bromide absorption type cold (hot) water unit is shown in fig. 1, and consists of a flue gas high-pressure generator 1, a heat source water generator 17, a low-pressure generator 9, a condenser 8, an evaporator 5, an absorber 4, a low-temperature solution heat exchanger 3, a high-temperature solution heat exchanger 2, a heating concentrated solution switching valve 10, a heating refrigerant steam switching valve 11, a solution pump 6, a refrigerant pump 7, a valve and a control system (not shown in the figure) and pipelines for connecting the components. When the unit operates under the refrigerating working condition, the smoke discharging temperature is about 170 ℃; when the unit is operated under heating conditions, for example, when the outlet temperature of heating water is 60 ℃, the smoke discharging temperature of the smoke high-pressure generator is 145 ℃, the outdoor temperature is low in winter, and the chimney emits white smoke, so that energy is wasted and the environment is polluted.
The heating efficient flue gas hot water type lithium bromide absorption type cold and hot water unit is shown in figure 2, and a flue gas heat exchanger 18, a heating evaporator 27, a heating absorber 20, a heating heat exchanger 21, a heating refrigerant pump 22, a circulating water pump 26, a switching valve, pipelines for connecting the components and the like are added on the basis of the common flue gas hot water type lithium bromide absorption type cold and hot water unit shown in figure 1. When the unit operates under the refrigerating working condition, the smoke exhaust temperature is still about 170 ℃, and is the same as that of a common unit; when the unit is operated under heating working conditions, for example, when the outlet temperature of heating water is 60 ℃, the exhaust gas temperature can be reduced to the normal temperature below 35 ℃, and the comprehensive utilization rate of the energy of the whole system can be improved. However, the outdoor temperature is low in winter, the normal-temperature exhaust temperature is lower than the dew point temperature of the smoke, condensate still can be separated out from the chimney, and the conventional carbon steel chimney can be corroded by the condensate, so that special requirements are provided for the chimney material, the chimney needs to be made of corrosion-resistant materials, and the investment cost is increased. How to find out an environment-friendly and efficient smoke hot water type lithium bromide absorption type cold and hot water machine set which can adopt conventional materials, does not need special requirements, can effectively eliminate white smoke, simultaneously recover smoke heat and improve the comprehensive utilization rate of energy sources of the whole system.
Disclosure of Invention
The invention aims to overcome the defects, and provides the environment-friendly and efficient smoke hot water type lithium bromide absorption type cold and hot water unit which can be made of conventional materials, does not need special requirements, can effectively eliminate white smoke, simultaneously recover smoke heat and improve the comprehensive utilization rate of energy of the whole system.
The purpose of the invention is realized in the following way: the utility model provides an environmental protection high-efficient flue gas hot water formula lithium bromide absorption formula cold, hot water unit, includes flue gas high pressure generator, heat source water generator, low pressure generator, condenser, evaporimeter, absorber, low temperature solution heat exchanger, high temperature solution heat exchanger, solution pump, coolant pump, flue gas heat exchanger, heating evaporimeter, heating absorber, heating heat exchanger, heating coolant pump and circulating water pump, the unit sets up the flue gas heat exchanger earlier on flue gas high pressure generator exhaust pipe, has set up flue gas solution heat exchanger and has advanced flue gas solution heat exchanger thin solution pipeline, go out flue gas solution heat exchanger thin solution pipeline again. The flue gas from the flue gas high-pressure generator firstly enters the flue gas heat exchanger and then enters the flue gas solution heat exchanger to be discharged.
And the newly added dilute solution pipeline of the flue gas inlet solution heat exchanger and the newly added dilute solution pipeline of the flue gas outlet solution heat exchanger can achieve the purpose in three connection modes:
first, a part of the dilute solution is separated from the outlet of the solution pump and enters the flue gas solution heat exchanger, and the part of the dilute solution enters the flue gas high-pressure generator after being discharged.
And secondly, separating part of the dilute solution from the outlet of the low-temperature solution heat exchanger, and enabling the part of the dilute solution to enter the flue gas solution heat exchanger, wherein the part of the dilute solution enters the flue gas high-pressure generator after exiting.
Thirdly, all the dilute solution from the low-temperature solution heat exchanger enters the flue gas solution heat exchanger, and all the dilute solution enters the high-temperature solution heat exchanger after exiting, and then enters the flue gas high-pressure generator.
The beneficial effects of the invention are as follows:
according to the invention, through the unit and the flow, when the refrigerating working condition is running, the flue gas waste heat is recovered by the flue gas solution heat exchanger by using the dilute solution with the temperature lower than the flue gas temperature, so that the refrigerating performance of the unit is improved; when the heating working condition is operated, low-temperature circulating water far lower than the saturation temperature of the flue gas is generated by a system of the flue gas heat exchanger and the flue gas heat exchange from the high-pressure generator, sensible heat and partial latent heat of water vapor in the flue gas are recovered, after the dehumidification effect is generated while the heat of the flue gas is recovered, the flue gas is heated by a dilute solution higher than the temperature of the flue gas through the flue gas solution heat exchanger, so that the relative humidity of the discharged flue gas is reduced, the temperature is higher than the dew point temperature of the flue gas, the white smoke phenomenon of a chimney is thoroughly eliminated while the heating performance is improved, the environment is protected while the heat pollution is reduced, and as the flue gas does not have condensate separated out in the chimney, the conventional material can be adopted without special requirements. The larger the water vapor proportion in the driving heat source flue gas is, the more condensation heat is recovered, and the higher the comprehensive utilization rate of the whole system energy is. The machine set is simple to operate.
Drawings
Fig. 1 is a schematic diagram of a heating flow of a conventional flue gas hot water type lithium bromide absorption type cold and hot water unit.
Fig. 2 is a schematic diagram of a heating flow of a heating efficient flue gas hot water type lithium bromide absorption type cold and hot water unit.
Fig. 3 is a schematic diagram of a heating flow path (first mode) of an environment-friendly and efficient flue gas hot water type lithium bromide absorption type cold and hot water unit.
Fig. 4 is a schematic diagram of a heating flow path (second mode) of an environment-friendly and efficient flue gas hot water type lithium bromide absorption type cold and hot water unit.
Fig. 5 is a schematic diagram of a heating flow path (third mode) of an environment-friendly and efficient flue gas hot water type lithium bromide absorption type cold and hot water unit.
Reference numerals:
high-pressure generator 1 for flue gas
High temperature solution heat exchanger 2
Cryogenic solution heat exchanger 3
Absorber 4
Evaporator 5
Solution pump 6
Refrigerant pump 7
Condenser 8
Low voltage generator 9
Heating concentrated solution switching valve 10
Heating refrigerant steam switching valve 11
Solution pump outlet pipe 12
Absorber cylinder bottom 13
Evaporator liquid bag 14
Cold and hot water inlet pipe 15
Cold and hot water outlet pipe 16
Heat source water generator 17
Flue gas heat exchanger 18
Heating absorber 20
Heating heat exchanger 21
Heating refrigerant pump 22
Heating dilute solution switching valve 23
Cryogenic coolant water make-up line 24
Heating hot water switching valve 25
Circulating water pump 26
Heating evaporator 27
Heating evaporator liquid bag 28
Flue gas solution heat exchanger 29
Dilute solution pipeline 30 of flue gas inlet solution heat exchanger
A flue gas solution heat exchanger dilute solution line 31.
Detailed Description
The invention relates to an environment-friendly efficient flue gas hot water type lithium bromide absorption type cold and hot water unit, which is based on a heating efficient flue gas hot water type lithium bromide absorption type cold and hot water unit shown in figure 2, a flue gas solution heat exchanger 29, a flue gas solution inlet heat exchanger dilute solution pipeline 30 and a flue gas solution outlet heat exchanger dilute solution pipeline 31 are additionally arranged, the additionally arranged flue gas solution heat exchanger 29 is arranged on a flue gas pipe of a flue gas heat exchanger 18, and flue gas from a flue gas high-pressure generator 1 firstly enters the flue gas heat exchanger 18 and then enters the flue gas solution heat exchanger 29 to be discharged. And the newly added dilute solution pipeline 30 of the flue gas inlet solution heat exchanger and the dilute solution pipeline 31 of the flue gas outlet solution heat exchanger can achieve the purpose in three connection modes:
first (as shown in fig. 3), a newly added dilute solution pipeline 30 of the flue gas inlet solution heat exchanger is arranged between the outlet of the solution pump 6 and the flue gas solution heat exchanger 29, a dilute solution pipeline 31 of the flue gas outlet solution heat exchanger is arranged between the flue gas solution heat exchanger 29 and the flue gas high-pressure generator 1, and a part of dilute solution is separated from the outlet of the solution pump 6 and enters the flue gas solution heat exchanger 29, and a part of dilute solution is separated and enters the flue gas high-pressure generator 1;
second (as shown in fig. 4), a newly added dilute solution pipeline 30 of the flue gas inlet solution heat exchanger is arranged between the outlet of the low-temperature solution heat exchanger 3 and the flue gas solution heat exchanger 29, a dilute solution pipeline 31 of the flue gas outlet solution heat exchanger is arranged between the flue gas solution heat exchanger 29 and the flue gas high-pressure generator 1, a part of dilute solution is separated from the outlet of the low-temperature solution heat exchanger 3 and enters the flue gas solution heat exchanger 29, and a part of dilute solution is separated and enters the flue gas high-pressure generator 1;
third (as shown in fig. 5), a newly added dilute solution pipeline 30 of the flue gas inlet solution heat exchanger is arranged between the outlet of the low-temperature solution heat exchanger 3 and the flue gas solution heat exchanger 29, a dilute solution pipeline 31 of the flue gas outlet solution heat exchanger is arranged between the inlet of the flue gas solution heat exchanger 29 and the inlet of the high-temperature solution heat exchanger 2, and all the dilute solution from the low-temperature solution heat exchanger 3 enters the flue gas solution heat exchanger 29, enters the high-temperature solution heat exchanger 2 after exiting, and then enters the flue gas high-pressure generator 1.
When the refrigerating working condition is operated, the heating concentrated solution switching valve 10, the heating refrigerant steam switching valve 11, the heating dilute solution switching valve 23 and the heating hot water switching valve 25 are all closed, the heating refrigerant pump 22 and the circulating water pump 26 are stopped, the heating evaporator 27, the heating absorber 20 and the heating heat exchanger 21 stop circulating, the conventional refrigerating circulation process still operates normally, the flue gas from the flue gas high-pressure generator 1 passes through the flue gas heat exchanger 18 without changing the flue gas temperature, then enters the flue gas solution heat exchanger 29 to exchange heat with dilute solution with the temperature lower than the flue gas temperature, and the flue gas release heat temperature is reduced to about 100 ℃ and is discharged. Compared with a flue gas hot water unit with the flue gas temperature of 170 ℃, the waste heat of the flue gas temperature difference of 70 ℃ is recovered, and the refrigerating performance is greatly improved.
When the heating working condition is operated, the refrigerant pump 7 and the external system cooling water pump are stopped, the heating concentrated solution switching valve 10 and the heating refrigerant steam switching valve 11 are opened, the solution pump 6 is started, the heating dilute solution switching valve 23 and the heating hot water switching valve 25 are opened, the heating refrigerant pump 22 and the circulating water pump 26 are started, the traditional heating circulation process still operates normally, the flue gas from the flue gas high-pressure generator 1 firstly enters the flue gas heat exchanger 18 to exchange heat with low-temperature circulating water which is far lower than the saturation temperature of the flue gas and is generated by a system of the flue gas heat exchanger, the sensible heat and part of the latent heat of the water vapor in the flue gas are recovered, after the dehumidification effect is generated while the heat of the flue gas is recovered, the flue gas enters the flue gas solution heat exchanger 29 to exchange heat with dilute solution which is higher than the temperature of the flue gas, the normal temperature flue gas is discharged after the temperature is increased, the relative humidity of the flue gas discharged at the moment is reduced and the temperature is higher than the dew point temperature of the flue gas, the unit thoroughly eliminates the phenomenon of white smoke of the chimney while improving the heating performance, the heat pollution is reduced, the environment is protected while no condensate is required to be separated in the chimney materials.
The low-temperature circulating water which is far lower than the saturation temperature of the flue gas and is generated by a system in the heating working condition operation is from the heat exchange tube of the heating evaporator 27, the circulating water pump 26 pumps the low-temperature circulating water into the flue gas heat exchanger 18, the low-temperature circulating water recovers the waste heat of the flue gas, heats up and then enters the heat exchange tube of the heating evaporator 27, the heating refrigerant pump 22 pumps out the low-temperature refrigerant water in the liquid bag 28 of the heating evaporator and sprays the low-temperature refrigerant water on the outer surface of the heat exchange tube of the heating evaporator 27, the low-temperature refrigerant water absorbs the heat of the circulating water flowing through the heat exchange tube to be vaporized into low-temperature refrigerant steam, and the temperature of the circulating water is reduced after the heat is released. The low-temperature refrigerant vapor is absorbed by the solution sprayed outside the heat exchange tube of the heating absorber 20, the heat released by the solution absorbing the low-temperature refrigerant vapor is taken away by part of low-temperature hot water from a heating user in the heat exchange tube, the solution in the heating absorber 20 continuously absorbs the refrigerant vapor to keep the pressure in the cavity at a certain value, and the vaporization and absorption process is continuously carried out, so that the low-temperature circulating water is prepared. The refrigerant water of the heating evaporator 27 is supplemented by the pressure difference between the cavities of the evaporator 5 and the heating evaporator 27, and enters the heating evaporator liquid bag 28 from the evaporator liquid bag 14 through the low-temperature refrigerant water supplementing pipeline 24, so as to continuously supplement the water of the heating evaporator 27. The dilute solution in the heating absorber 20 is changed into dilute solution with lower concentration after absorbing low-temperature refrigerant steam, the dilute solution is heated by a high liquid level pressure difference through the heating heat exchanger 21 and enters the bottom 13 of the absorber cylinder to be mixed with the dilute solution in the absorber 4, and then the dilute solution is respectively sent to the heating absorber 20 to be sprayed by the solution pump 6, is sent to the flue gas high-pressure generator 1 to be concentrated and is sent to the newly added flue gas solution heat exchanger 29 to exchange heat.
The scheme is applicable to the evaporator 5 and the absorber 4, and the scheme can be a single section (shown in the figure), two sections or multiple sections, and the cooling water can be in a parallel flow path (shown in the figure) or a series flow path.
Claims (3)
1. The utility model provides an environmental protection high-efficient flue gas hot water formula lithium bromide absorption formula cold, hot water unit, including flue gas high pressure generator (1), heat source water generator (17), low pressure generator (9), condenser (8), evaporimeter (5), absorber (4), low temperature solution heat exchanger (3), high temperature solution heat exchanger (2), solution pump (6), coolant pump (7), flue gas heat exchanger (18), heating evaporimeter (27), heating absorber (20), heating heat exchanger (21), heating coolant pump (22) and circulating water pump (26), its characterized in that: the unit is characterized in that a smoke heat exchanger (18) is arranged on a smoke exhaust pipe of a smoke high-pressure generator (1), and then a smoke solution heat exchanger (29) and a smoke solution inlet heat exchanger dilute solution pipeline (30) and a smoke solution outlet heat exchanger dilute solution pipeline (31) are arranged; the flue gas from the flue gas high-pressure generator (1) firstly enters the flue gas heat exchanger (18) and then enters the flue gas solution heat exchanger (29) for discharge;
the flue gas inlet solution heat exchanger dilute solution pipeline (30) is arranged between the outlet of the solution pump (6) and the flue gas solution heat exchanger (29), the flue gas outlet solution heat exchanger dilute solution pipeline (31) is arranged between the flue gas solution heat exchanger (29) and the flue gas high-pressure generator (1), part of dilute solution is separated from the outlet of the solution pump (6) and enters the flue gas solution heat exchanger (29) for heating or cooling, and the separated dilute solution enters the flue gas high-pressure generator (1) for concentration; or,
the flue gas inlet solution heat exchanger dilute solution pipeline (30) is arranged between the outlet of the low-temperature solution heat exchanger (3) and the flue gas solution heat exchanger (29), the flue gas outlet solution heat exchanger dilute solution pipeline (31) is arranged between the flue gas solution heat exchanger (29) and the flue gas high-pressure generator (1), part of dilute solution is separated from the outlet of the low-temperature solution heat exchanger (3) and enters the flue gas solution heat exchanger (29) for heating or cooling, and the separated dilute solution enters the flue gas high-pressure generator (1) for concentration; or,
the flue gas inlet solution heat exchanger dilute solution pipeline (30) is arranged between the outlet of the low-temperature solution heat exchanger (3) and the flue gas solution heat exchanger (29), the flue gas outlet solution heat exchanger dilute solution pipeline (31) is arranged between the flue gas solution heat exchanger (29) and the inlet of the high-temperature solution heat exchanger (2), all the dilute solution from the low-temperature solution heat exchanger (3) enters the flue gas solution heat exchanger (29) for heating or cooling, all the dilute solution after the dilute solution is discharged enters the high-temperature solution heat exchanger (2) for heating, and then enters the flue gas high-pressure generator (1) for concentration;
when the refrigerating working condition is operated, the heating concentrated solution switching valve, the heating refrigerant steam switching valve, the heating dilute solution switching valve and the heating hot water switching valve are all closed, the heating refrigerant pump and the circulating water pump are stopped, the heating evaporator, the heating absorber and the heating heat exchanger are stopped to circulate, the conventional refrigerating circulation process still operates normally, the flue gas from the flue gas high-pressure generator firstly passes through the flue gas heat exchanger without changing the flue gas temperature, and then enters the flue gas solution heat exchanger to exchange heat with dilute solution with the temperature lower than the flue gas;
when the heating working condition is operated, the refrigerant pump and the external system cooling water pump are stopped, the heating concentrated solution switching valve and the heating refrigerant steam switching valve are opened, the solution pump is started, the heating dilute solution switching valve and the heating hot water switching valve are opened, the heating refrigerant pump and the circulating water pump are started, the traditional heating circulation flow still operates normally, the flue gas from the flue gas high-pressure generator firstly enters the flue gas heat exchanger to exchange heat with low-temperature circulating water which is generated by the flue gas high-pressure generator and is far lower than the saturation temperature of the flue gas, sensible heat and partial latent heat of the water vapor in the flue gas are recovered, after the dehumidification effect is generated while the heat of the flue gas is recovered, the flue gas enters the flue gas solution heat exchanger to exchange heat with dilute solution which is higher than the temperature of the flue gas, and the temperature of the normal temperature flue gas is increased and then discharged;
the low-temperature circulating water which is far lower than the saturation temperature of the flue gas and is generated by a system in the heating working condition operation is from the heat exchange tube of the heating evaporator, the circulating water pump pumps the low-temperature circulating water into the flue gas heat exchanger, the low-temperature circulating water recovers the waste heat of the flue gas, heats up and then enters the heat exchange tube of the heating evaporator, the heating refrigerant pump pumps out the low-temperature refrigerant water in the liquid bag of the heating evaporator and sprays the low-temperature refrigerant water on the outer surface of the heat exchange tube of the heating evaporator, the low-temperature refrigerant water absorbs the heat of the circulating water flowing through the heat exchange tube to be vaporized into low-temperature refrigerant steam, and the temperature of the circulating water is reduced after the heat is released; the low-temperature refrigerant steam is absorbed by the solution sprayed outside the heat exchange tube of the heating absorber, the heat released by the solution absorbing the low-temperature refrigerant steam is taken away by part of low-temperature hot water from a heating user in the heat exchange tube, the solution in the heating absorber continuously absorbs the refrigerant steam to keep the pressure in the cavity at a certain value, and the vaporization and absorption process is continuously carried out, so that the low-temperature circulating water is prepared; the refrigerant water replenishing of the heating evaporator enters the heating evaporator liquid bag from the evaporator liquid bag through a low-temperature refrigerant water replenishing pipeline by the pressure difference between the evaporator and the heating evaporator cavity, and the heating evaporator is continuously replenished with water; the dilute solution in the heating absorber is changed into dilute solution with lower concentration after absorbing low-temperature refrigerant steam, the dilute solution is heated by a high liquid level pressure difference through a heating heat exchanger and enters the bottom of the absorber cylinder to be mixed with the dilute solution in the absorber, and then the dilute solution is respectively sent to the heating absorber to be sprayed by a solution pump, is sent to a smoke high-pressure generator to be concentrated and is sent to a newly added smoke solution heat exchanger to exchange heat.
2. The environment-friendly and efficient smoke hot water type lithium bromide absorption cold and hot water unit as claimed in claim 1, wherein the unit is characterized in that: the evaporator (5) and absorber (4) of the unit are single-section, two-section or multi-section.
3. The environment-friendly and efficient smoke hot water type lithium bromide absorption cold and hot water unit as claimed in claim 1, wherein the unit is characterized in that: the cooling water of the unit is in a parallel flow path or a series flow path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810309249.9A CN108518885B (en) | 2018-04-09 | 2018-04-09 | Environment-friendly efficient smoke hot water type lithium bromide absorption type cold and hot water unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810309249.9A CN108518885B (en) | 2018-04-09 | 2018-04-09 | Environment-friendly efficient smoke hot water type lithium bromide absorption type cold and hot water unit |
Publications (2)
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