CN109579105A - A kind of gas absorption heat pump system - Google Patents
A kind of gas absorption heat pump system Download PDFInfo
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- CN109579105A CN109579105A CN201811277686.3A CN201811277686A CN109579105A CN 109579105 A CN109579105 A CN 109579105A CN 201811277686 A CN201811277686 A CN 201811277686A CN 109579105 A CN109579105 A CN 109579105A
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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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Abstract
Gas absorption heat pump system provided by the invention, the new model that pressure evaporation and middle pressure absorb in being introduced on the basis of traditional single-effective absorption system, wherein, the heat source of middle pressure evaporator is low-temperature flue gas latent heat, the heat source of low pressure evaporator is external environment, and pressure throttling valve opening in being adjusted in real time according to environment temperature, so that controlling intermediate pressure reaches best, and then the adaptability of system at low ambient temperatures is enhanced, improve the coefficient of performance of system at low ambient temperatures.
Description
Technical field
The present invention relates to gas-heating and absorption system field, especially a kind of gas absorption heat pump system.
Background technique
China's building energy consumption accounts for about the 23% of total energy consumption, and with Urbanization Construction accelerated development and Living consumption
It improves, building energy consumption will be further increased.If data show that building energy consumption reaches the 50% of the U.S. to Chinese cities and towns per capita, it is contemplated that
The building energy consumption of the year two thousand twenty China will be more than Chinese energy total supply in 2005.And air-conditioning in building energy consumption, for the hot water that warms up
Energy consumption accounting is maximum, and especially north of china in winter cities and towns heating accounts for about the 40% of building energy consumption.
Existing heating means are mainly fuel combustion water heating, comprising: fire coal/gas fired-boiler, cogeneration of heat and power and cold
Cogeneration of heat and power.Coal burning system can generate a large amount of particulate matter, be not meet energy-saving and emission-reduction, protection the main reason for leading to haze
The demand of environment.Traditional cogeneration of heat and power and cogeneration equipment is huge, investment is high, and is limited to generating efficiency and electricity drive
The efficiency of dynamic heat pump, the non-renewable energy efficiency (under 0 DEG C of circumstance temperature) of heating are often no more than 1.4.The combustion being widely used at present
Steam pot furnace system, delivery temperature are up to 150~200 DEG C, cause huge energy waste, one time energy efficiency generally exists
Between 0.7~0.8.Many documents focus on the flue gas waste heat recovery of gas-fired Boiler System, and main means include pre- using air
Hot device, condensing boiler and absorption heat pump.Using the system of air preheater, due to air side there is no phase transformation and fume side is big
For part of waste heat from steam condensation, recovering effect is very limited；Using the system of condensing boiler, since hot water temperature generally exists
It is 50~60 DEG C or so, very close with the dew-point temperature of flue gas, therefore most Latent heat can not recycle, non-renewable energy effect
Rate promotes amplitude very little.
Ming et al. (Energy Conversion and Management, 2014,87:175-184) utilizes absorption
Heat pump and flue gas heat exchanger recycle the fume afterheat of gas fired-boiler, and analyze the superiority and inferiority that compared three kinds of forms.High temperature cigarette
Gas sensible heat directly feeds hot water by flue gas heat exchanger, and low-temperature flue gas latent heat supplies the evaporator of absorption heat pump；And it absorbs
The generator heat source of formula heat pump is then respectively from high-temperature flue gas, hot water and natural gas direct combustion, and analog result shows latter two shape
The non-renewable energy efficiency of gas fired-boiler can be improved 10% by formula.Since the main heat supply source of the system is natural gas direct combustion, because
Successively energy efficiency remains unchanged less than 0.9 for this.Wei et al. (Applied Thermal Engineering, 2015,86:326-
332) fume afterheat of gas fired-boiler is recycled using open absorption heat pump.The driving heat source of its generator is from natural gas
Direct combustion, the flue gas that the flue gas that burning generates is generated together with a part of gas fired-boiler are directly entered in absorber, and steam is by CaCl2
Solution absorbs and releases latent heat, this partially absorbs heat and is used to the hot water that preheating enters gas fired-boiler together with condensation heat.Simulation
The results show that compared to the gas-fired Boiler System using absorption heat pump, the non-renewable energy efficiency raising 1.5% of the system, and
11% is improved compared to gas only boiler system.Above in relation to the linguistic term of gas fired-boiler, an equal nothing of energy efficiency
Method breaks through 1, and system is complex.
For traditional gas absorption heat pump, lack effective hand of fume afterheat (especially latent heat part) recycling
Section, thus coefficient of performance COP and non-renewable energy efficiency PEE are lower；Simultaneously when the environment temperature decreases, system performance is rapid
Deteriorate.
Summary of the invention
Have in view of that, it is necessary in view of the defects existing in the prior art, provide a kind of combustion that utilization rate of waste heat can be improved
Aspiration formula heat pump system.
To achieve the above object, the present invention adopts the following technical solutions:
A kind of gas absorption heat pump system, comprising: flue gas branch, working medium branch, solution branch and hot water branch,
In:
The flue gas branch include combustion chamber (2), the solution preheater (17) being connect with the combustion chamber (2) and with it is described
The middle pressure evaporator (7) of solution preheater (17) connection；
The working medium branch includes sequentially connected rectifier (3), condenser (4), subcooler (5), middle pressure throttling
Valve (6), middle pressure evaporator (7), separator (8), low pressure working fluid throttle valve (9) and low pressure evaporator (10), the low pressure evaporation
Device (10) is also connected with the subcooler (5)；
The solution branch includes the generator (1) being successively linked in sequence, middle pressure solution liquid throttle valve (11), middle pressure absorber
(12), hypotonic solution throttle valve (13), low-pressure absorber (14), fluid reservoir (15) and solution pump (16), the solution pump (16)
It is also connected with the rectifier (3)；
The hot water branch include in the rectifier (3), the condenser (4) and the low-pressure absorber (14) at least
Two kinds；In the flue gas branch, combustion gas is burnt in the combustion chamber (2), and the combustion heat of generation is supplied to the generator
(1), the high-temperature flue gas of generation enter the solution preheater (17), through the solution preheater (17) generate medium temperature flue gas into
Enter medium pressure evaporator (7), the low-temperature flue gas generated through medium pressure evaporator (7) is discharged by medium pressure evaporator (7)；
In the working medium branch, the gaseous working medium that the generator (1) generates enters rectifier (3), the reflux of generation
Liquid is condensed into the condenser (4), and the liquid refrigerant of generation is subcooled into the subcooler (5), subsequently into medium pressure
Throttling valve (6) throttling, the middle pressure working medium of generation enters medium pressure evaporator (7) part and evaporates, subsequently into described point
Gas-liquid separator is carried out from device (8), middle pressure gaseous working medium enters medium pressure absorber (12) and is absorbed, and middle pressure liquid refrigerant
It throttles, is evaporated subsequently into the low pressure evaporator (10), the low-pressure gaseous work of generation into the low pressure working fluid throttle valve (9)
Matter enters the subcooler (5) and is heated, and is absorbed subsequently into the low-pressure absorber (14)；
In the solution branch, the concentrated solution after phegma and preheating enters the generator (1), the high temperature after generation
Weak solution returns to release sensible heat inside the generator (1) and temperature reduces, subsequently into medium pressure solution throttle valve (11)
Throttling, the weak solution after throttling enter medium pressure absorber (12), and gaseous working medium is pressed in absorption and becomes intermediate solution, described
Intermediate solution throttles into the hypotonic solution throttle valve (13), and the intermediate solution after throttling enters the low-pressure absorber
(14), it absorbs low-pressure gaseous working medium and becomes concentrated solution, the concentrated solution enters the fluid reservoir (15), subsequently into described molten
Liquid pump (16) pressurization；
In the hot water branch, return water increases by the hot water branch temperature and becomes water supply and be transported to heat user.
In some preferred embodiments, the solution branch further includes the solution preheater (17), pressurized dense
Solution enters medium pressure absorber (12), and pressure absorbs heat in absorption and temperature increases；The solution preheater (17) is entered back into,
Absorb high-temperature flue gas sensible heat and temperature further increases；Finally enter the generator (1).
In some preferred embodiments, the solution branch further includes the solution preheater (17), pressurized dense
Solution initially enters the rectifier (3), and absorption distillation is warm and temperature increases；Subsequently into medium pressure absorber (12), inhale
Pressure absorbs heat in receipts and temperature continues to increase；Subsequently into the solution preheater (17), high-temperature flue gas sensible heat is absorbed and temperature
Further increase；Finally enter the generator (1).
In some preferred embodiments, the concentrated solution of the generator (1) flows through the sky filled with filler from top to bottom
Between, the caloic that the space and gaseous steam from bottom to top are directly contacted exchanges, while with after generation from bottom to top
High temperature weak solution carry out wall-type heat exchange.
In some preferred embodiments, the gaseous working medium of the rectifier (3) is flowed through from bottom to top filled with filler
Space, the caloic that the space and top-down phegma are directly contacted exchange, at the same with top-down hot water into
Row wall-type heat exchange.
In some preferred embodiments, the rectifier (3), gaseous working medium flowed through from bottom to top filled with filler
Space, the caloic that the space and top-down phegma are directly contacted exchange, at the same with after top-down pressurization
Concentrated solution carry out wall-type heat exchange.
In some preferred embodiments, the evaporating pressure of medium pressure evaporator (7) can be by medium pressure throttling
Valve (6) is according to local environment temperature real-time monitoring.
In some preferred embodiments, in the hot water branch, return water successively passes through the condenser (4) and described low
It presses absorber (14), temperature gradually rises after absorption condensation heat and low pressure absorb heat respectively, becomes water supply and is conveyed to heat user.
In some preferred embodiments, in the hot water branch, return water successively pass through the low-pressure absorber (14) and
The condenser (4) absorbs temperature after low pressure absorbs the solidifying heat of hot and cold respectively and gradually rises, becomes water supply and be conveyed to heat user.
It in some preferred embodiments, further include defrosting branch, the defrosting branch includes defrosting regulating valve (18), institute
The both ends for stating defrosting regulating valve (18) are separately connected the low pressure working fluid throttle valve (9) and the hypotonic solution throttle valve (13).
The present invention by adopting the above technical scheme the advantages of be:
Gas absorption heat pump system provided by the invention, be introduced on the basis of traditional single-effective absorption system in press steam
The new model that hair and middle pressure absorb, wherein the heat source of pressure evaporator is low-temperature flue gas latent heat, the heat source of low pressure evaporator is the external world
Environment, and throttling valve opening is pressed in adjusting in real time according to environment temperature, reach most preferably to control intermediate pressure, Jin Erzeng
The strong adaptability of system at low ambient temperatures, improves the coefficient of performance of system at low ambient temperatures.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of gas absorption heat pump system provided by the invention；
Fig. 2 is the structural schematic diagram for the gas absorption heat pump system that the embodiment of the present invention 1 provides；
Fig. 3 is the structural schematic diagram for the gas absorption heat pump system that the embodiment of the present invention 2 provides；
Wherein: 1- generator；The combustion chamber 2-；3- rectifier；4- condenser；5- subcooler；Throttling valve is pressed in 6-；7-
Middle pressure evaporator；8- separator；9- low pressure working fluid throttle valve；10- low pressure evaporator；Pressure solution liquid throttle valve in 11-；It is pressed in 12-
Absorber；13- hypotonic solution throttle valve；14- low-pressure absorber；15- fluid reservoir；16- solution pump；17- solution preheater；18-
Defrost regulating valve.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, being the structural schematic diagram of gas absorption heat pump system provided in an embodiment of the present invention, comprising: cigarette
Gas branch, working medium branch, solution branch and hot water branch.Wherein:
The flue gas branch include combustion chamber (2), the solution preheater (17) being connect with the combustion chamber (2) and with it is described
The middle pressure evaporator (7) of solution preheater (17) connection.
Specifically, in the flue gas branch, combustion gas is burnt in the combustion chamber (2), and the combustion heat of generation is supplied to institute
It states generator (1), the high-temperature flue gas of generation enters the solution preheater (17), through in the solution preheater (17) generation
Warm flue gas enters medium pressure evaporator (7), and the low-temperature flue gas generated through medium pressure evaporator (7) is by medium pressure evaporator
(7) it is discharged；
It is appreciated that high-temperature flue gas sensible heat is separately recovered using solution preheater (17) and middle pressure evaporator (7) in the present invention
With low-temperature flue gas latent heat, the step recycling to fume afterheat is realized, flue gas heat transfer temperature difference and system irreversible loss are reduced,
Improve system energy utilization efficiency.
The working medium branch includes sequentially connected rectifier (3), condenser (4), subcooler (5), middle pressure throttling
Valve (6), middle pressure evaporator (7), separator (8), low pressure working fluid throttle valve (9) and low pressure evaporator (10), the low pressure evaporation
Device (10) is also connected with the subcooler (5).
Specifically, in the working medium branch, the gaseous working medium that the generator (1) generates enters rectifier (3), generates
Phegma condensed into the condenser (4), the liquid refrigerant of generation enters the subcooler (5) supercooling, subsequently into institute
Middle pressure throttling valve (6) throttling is stated, the middle pressure working medium of generation enters medium pressure evaporator (7) part and evaporates, subsequently into
The separator (8) carries out gas-liquid separator, and middle pressure gaseous working medium enters medium pressure absorber (12) and is absorbed, and middle hydraulic fluid
State working medium throttles into the low pressure working fluid throttle valve (9), evaporates subsequently into the low pressure evaporator (10), the low pressure of generation
Gaseous working medium enters the subcooler (5) and is heated, and is absorbed subsequently into the low-pressure absorber (14).
It is appreciated that middle pressure evaporator (7) is introduced in the working medium branch, the working substance steam that generator (1) generates
After rectifying, condensation, supercooling and throttling process, evaporator (7) are pressed to absorb high-temperature flue gas sensible heat and partially evaporate in, and not
The liquid refrigerant of evaporation enters low pressure evaporator (10) evaporating completely after further throttling.
Since generator (1) and middle pressure absorber (12) have internal backheating function, generator (1) can effectively recycle hair
The sensible heat of high temperature weak solution after life, and middle pressure absorber (12) can effectively recycle in pressure absorb heat, to significantly improve systematicness
Energy.
The solution branch includes the generator (1) being successively linked in sequence, middle pressure solution liquid throttle valve (11), middle pressure absorber
(12), hypotonic solution throttle valve (13), low-pressure absorber (14), fluid reservoir (15) and solution pump (16), the solution pump (16)
It is also connected with the rectifier (3).
Specifically, in the solution branch, the concentrated solution after phegma and preheating enters the generator (1), occurs
High temperature weak solution afterwards returns to release sensible heat inside the generator (1) and temperature reduces, subsequently into medium pressure solution section
Valve (11) throttling is flowed, the weak solution after throttling enters medium pressure absorber (12), and gaseous working medium is pressed in absorption and becomes centre
Solution, the intermediate solution throttle into the hypotonic solution throttle valve (13), and the intermediate solution after throttling enters the low pressure
Absorber (14) absorbs low-pressure gaseous working medium and becomes concentrated solution, and the concentrated solution enters the fluid reservoir (15), subsequently into
Solution pump (16) pressurization.
It is appreciated that middle pressure absorber (12) is introduced in the solution branch, the middle pressure that middle pressure evaporator (7) evaporates
Gaseous working medium in middle pressure absorber 12 by weak solution absorb and become intermediate solution, and low pressure evaporator (10) evaporate it is low
Gaseous working medium is pressed to be absorbed in low-pressure absorber 14 by intermediate solution and become concentrated solution.
In some preferred embodiments, the solution branch further includes the solution preheater (17), pressurized dense
Solution enters medium pressure absorber (12), and pressure absorbs heat in absorption and temperature increases；The solution preheater (17) is entered back into,
Absorb high-temperature flue gas sensible heat and temperature further increases；Finally enter the generator (1).
In some preferred embodiments, the solution branch further includes the solution preheater (17), pressurized dense
Solution initially enters the rectifier (3), and absorption distillation is warm and temperature increases；Subsequently into medium pressure absorber (12), inhale
Pressure absorbs heat in receipts and temperature continues to increase；Subsequently into the solution preheater (17), high-temperature flue gas sensible heat is absorbed and temperature
Further increase；Finally enter the generator (1).
In some preferred embodiments, the concentrated solution of the generator (1) flows through the sky filled with filler from top to bottom
Between, the caloic that the space and gaseous steam from bottom to top are directly contacted exchanges, while with after generation from bottom to top
High temperature weak solution carry out wall-type heat exchange.
In some preferred embodiments, the gaseous working medium of the rectifier (3) is flowed through from bottom to top filled with filler
Space, the caloic that the space and top-down phegma are directly contacted exchange, at the same with top-down hot water into
Row wall-type heat exchange.
In some preferred embodiments, the rectifier (3), gaseous working medium flowed through from bottom to top filled with filler
Space, the caloic that the space and top-down phegma are directly contacted exchange, at the same with after top-down pressurization
Concentrated solution carry out wall-type heat exchange.
In some preferred embodiments, the evaporating pressure of medium pressure evaporator (7) can be by medium pressure throttling
Valve (6) is according to local environment temperature real-time monitoring.
In some preferred embodiments, the hot water branch includes the rectifier (3), the condenser (4) and institute
It states at least two in low-pressure absorber (14), return water increases by the hot water branch temperature and becomes water supply and be transported to hot use
Family, the efficient means of combustion gas water heating and district heating, especially suitable for cold district.
In some preferred embodiments, in the hot water branch, return water successively passes through the condenser (4) and described low
It presses absorber (14), temperature gradually rises after absorption condensation heat and low pressure absorb heat respectively, becomes water supply and is conveyed to heat user, fires
The efficient means of gas water heating and district heating, especially suitable for cold district.
In some preferred embodiments, in the hot water branch, return water successively pass through the low-pressure absorber (14) and
The condenser (4) absorbs temperature after low pressure absorbs the solidifying heat of hot and cold respectively and gradually rises, becomes water supply and be conveyed to heat user,
The efficient means of combustion gas water heating and district heating, especially suitable for cold district.
In some preferred embodiments, the gas absorption heat pump system further includes defrosting branch, the defrosting branch
Road include defrosting regulating valve (18), it is described defrosting regulating valve (18) both ends be separately connected the low pressure working fluid throttle valve (9) and
The hypotonic solution throttle valve (13).
It is appreciated that gas absorption heat pump system provided by the invention, it, can be in systems stay by increasing the branch that defrosts
Device defrosting is evaporated in the case where heat supply, defrosting speed is controlled by defrosting control valve opening, easy to operate, significant effect.
Gas absorption heat pump system provided by the invention, be introduced on the basis of traditional single-effective absorption system in press steam
The new model that hair and middle pressure absorb, wherein the heat source of middle pressure evaporator is low-temperature flue gas latent heat, and the heat source of low pressure evaporator is outer
Boundary's environment, and throttling valve opening is pressed in adjusting in real time according to environment temperature, reach most preferably, in turn to control intermediate pressure
The adaptability of system at low ambient temperatures is enhanced, the coefficient of performance of system at low ambient temperatures is improved.
Illustrate below in conjunction with specific embodiment.
Embodiment 1
Referring to Fig. 2, the structural schematic diagram of the gas absorption heat pump system provided for the embodiment of the present invention 1.
In flue gas branch, 20 DEG C of natural gas (main component is methane) and the gaseous mixture of combustion air enter combustion through G1
It burns room 2 and carries out full combustion, excess air ratio 20% at 200 DEG C, the combustion heat of generation is supplied to generator 1, generation
180 DEG C of high-temperature flue gas enter solution preheater 17 through G2, and high temperature sensible heat enters the concentrated solution of generator, temperature drop to preheat
Low is 120 DEG C；Then through G3 enter in press evaporator 7, low temperature latent heat to evaporation section working medium, temperature further decrease for
20 DEG C, outwardly environment most is arranged through G4 discharge system afterwards.
In solution branch, 110 DEG C concentrated solutions of the phegma after S0 and preheating enter generator through S1, absorb hair first
High temperature weak solution sensible heat after life and generated under the pressure of 1.7MPa it is preliminary effect occurs, then absorb what combustion chamber 2 generated
The combustion heat and generate and further effect occur；180 DEG C after generation, 7% concentration weak solution returns through S2 and releases inside generator
Put sensible heat and temperature is reduced to 120 DEG C, then through S3 enter in pressure solution liquid throttle valve 11 throttle, pressure reduction is intermediate pressure
0.7MPa；Weak solution after throttling through S4 enter in press absorber 12, absorb and press gaseous working medium in 0.7MPa and to become 15% dense
Spend intermediate solution；Intermediate solution enters hypotonic solution throttle valve 13 through S5 and throttles, pressure reduction 0.23MPa；In after throttling
Between solution through S6 enter low-pressure absorber 14, absorb 0.23MPa low-pressure gaseous working medium and become 50 DEG C, 30% concentration concentrated solution；
Concentrated solution enters fluid reservoir 15 through S7, then enters solution pump 16 through S8 and is pressurized to 1.7MPa.Pressurized concentrated solution through S9 into
Enter middle pressure absorber 12, pressure absorbs heat in absorption and temperature raising is 100 DEG C, then enters solution preheater 17 through S10, absorbs
It is 110 DEG C that high-temperature flue gas sensible heat and temperature, which further increase, most enters generator through S1 afterwards.
In working medium branch, the 1.7MPa gaseous working medium that generator 1 generates enters rectifier through R0, discharges rectified heat to hot water
And partial condensation, while carrying out that caloic exchanges with the phegma that condensation generates and concentration increases as 99.9% or more, then through R1
Condensed into condenser 4, the liquid refrigerant of generation enters subcooler 5 through R2 and is subcooled, then through R3 enter in press throttling valve 6
Throttling is 0.7MPa, the middle pressure working medium of generation through R4 enter in the evaporation of pressure 7 part of evaporator, then through R5 enter separator 8 into
Promoting the circulation of qi liquid/gas separator, middle pressure gaseous working medium through R6 enter in pressure absorber 12 be absorbed, and middle pressure liquid refrigerant through R7 into low
Pressing the throttling of throttling valve 9 is 0.23MPa, then enters 10 evaporating completely of low pressure evaporator, -15 DEG C of low pressure gas of generation through R8
State working medium enters subcooler 5 through R9 and is heated to be 30 DEG C, then enters low-pressure absorber 14 through R10 and is absorbed.
In hot water branch, 35 DEG C of return water enter condenser 4 through W1, and absorption condensation is warm and temperature raising is 43 DEG C；Then it passes through
W2 enters rectifier 3, absorption distillation heat and temperature continues to increase is 46 DEG C；Then enter low-pressure absorber 14 through W3, absorb low
Pressure absorb heat and temperature further increases be 55 DEG C；It is most transported to outside system through W4 afterwards, is supplied to heat user as water supply.
Defrost branch in, when low pressure evaporator 10 needs to defrost, defrosting regulating valve 18 open, part intermediate solution directly with
Liquid refrigerant after throttling is mixed and fed into low pressure evaporator 10, and the absorption heat of generation is to defrost；During defrosting, system will
Continue heat supply, but its heating load declines；The rate that defrosts is controlled by 18 aperture of defrosting regulating valve, and aperture is bigger, and defrosting rate is faster,
But the decline of simultaneity factor heating load is more；Aperture is smaller, and defrosting rate is slower, but the decline of simultaneity factor heating load is fewer.
Embodiment 2
Referring to Fig. 3, the structural schematic diagram of the gas absorption heat pump system provided for the embodiment of the present invention 2.
In flue gas branch, 20 DEG C of natural gas (main component is methane) and the gaseous mixture of combustion air enter burning through G1
Room 2 carries out full combustion, excess air ratio 20% at 200 DEG C, and the combustion heat of generation is supplied to generator 1, and the 180 of generation
DEG C high-temperature flue gas enters solution preheater 17 through G2, and high temperature sensible heat enters the concentrated solution of generator to preheat, and temperature reduces
It is 120 DEG C；Then through G3 enter in press evaporator 7, for low temperature latent heat to evaporation section working medium, it is 20 that temperature, which further decreases,
DEG C, most outwardly environment is arranged through G4 discharge system afterwards.
In solution branch, 110 DEG C concentrated solutions of the phegma after S0 and preheating enter generator through S1, absorb occur first
Rear high temperature weak solution sensible heat and generated under the pressure of 1.7MPa it is preliminary effect occurs, then absorb the combustion that combustion chamber 2 generates
It heats and generates further generation effect；180 DEG C after generation, 7% concentration weak solution through S2 return to release inside generator
Sensible heat and temperature is reduced to 120 DEG C, then through S3 enter in pressure solution liquid throttle valve 11 throttle, pressure reduction is intermediate pressure
0.7MPa；Weak solution after throttling through S4 enter in press absorber 12, absorb and press gaseous working medium in 0.7MPa and to become 15% dense
Spend intermediate solution；Intermediate solution enters hypotonic solution throttle valve 13 through S5 and throttles, pressure reduction 0.23MPa；In after throttling
Between solution through S6 enter low-pressure absorber 14, absorb 0.23MPa low-pressure gaseous working medium and become 50 DEG C, 30% concentration concentrated solution；
Concentrated solution enters fluid reservoir 15 through S7, then enters solution pump 16 through S8 and is pressurized to 1.7MPa.Pressurized concentrated solution through S9 into
Enter rectifier 3, absorption distillation is warm and temperature raising is 75 DEG C；Then through S10 enter in press absorber 12, pressure absorbs heat in absorption
And it is 105 DEG C that temperature, which continues to increase,；Then enter solution preheater 17 through S11, absorb high-temperature flue gas sensible heat and temperature is further
Increase is 110 DEG C；Most enter generator through S1 afterwards.
In working medium branch, the 1.7MPa gaseous working medium that generator 1 generates enters rectifier through R0, discharges rectified heat to hot water
And partial condensation, while carrying out that caloic exchanges with the phegma that condensation generates and concentration increases as 99.9% or more, then through R1
Condensed into condenser 4, the liquid refrigerant of generation enters subcooler 5 through R2 and is subcooled, then through R3 enter in press throttling valve 6
Throttling is 0.7MPa, the middle pressure working medium of generation through R4 enter in the evaporation of pressure 7 part of evaporator, then through R5 enter separator 8 into
Promoting the circulation of qi liquid/gas separator, middle pressure gaseous working medium through R6 enter in pressure absorber 12 be absorbed, and middle pressure liquid refrigerant through R7 into low
Pressing the throttling of throttling valve 9 is 0.23MPa, then enters 10 evaporating completely of low pressure evaporator, -15 DEG C of low pressure gas of generation through R8
State working medium enters subcooler 5 through R9 and is heated to be 30 DEG C, then enters low-pressure absorber 14 through R10 and is absorbed.
In hot water branch, 35 DEG C of return water enter low-pressure absorber 14 through W1, and absorption low pressure absorbs heat and temperature raising is 45
℃；Then enter condenser 4 through W2, absorption condensation heat and temperature further increases is 55 DEG C；Most it is transported to outside system through W3 afterwards,
Heat user is supplied to as water supply.
Defrost branch in, when low pressure evaporator 10 needs to defrost, defrosting regulating valve 18 open, part intermediate solution directly with
Liquid refrigerant after throttling is mixed and fed into low pressure evaporator 10, and the absorption heat of generation is to defrost；During defrosting, system will
Continue heat supply, but its heating load declines；The rate that defrosts is controlled by 18 aperture of defrosting regulating valve, and aperture is bigger, and defrosting rate is faster,
But the decline of simultaneity factor heating load is more；Aperture is smaller, and defrosting rate is slower, but the decline of simultaneity factor heating load is fewer.
Certainly gas absorption heat pump system of the invention can also have a variety of transformation and remodeling, it is not limited to above-mentioned reality
Apply the specific structure of mode.In short, protection scope of the present invention should include that those show to those skilled in the art
And the transformation or substitution that are clear to and remodeling.
Claims (10)
1. a kind of gas absorption heat pump system characterized by comprising flue gas branch, working medium branch, solution branch and hot water
Branch, in which:
The flue gas branch include combustion chamber (2), the solution preheater (17) being connect with the combustion chamber (2) and with the solution
The middle pressure evaporator (7) of preheater (17) connection；
The working medium branch includes sequentially connected rectifier (3), condenser (4), subcooler (5), middle pressure throttling valve
(6), middle pressure evaporator (7), separator (8), low pressure working fluid throttle valve (9) and low pressure evaporator (10), the low pressure evaporator
(10) subcooler (5) are also connected with；
The solution branch includes the generator (1) being successively linked in sequence, middle pressure solution liquid throttle valve (11), middle pressure absorber
(12), hypotonic solution throttle valve (13), low-pressure absorber (14), fluid reservoir (15) and solution pump (16), the solution pump (16)
It is also connected with the rectifier (3)；
The hot water branch includes at least two in the rectifier (3), the condenser (4) and the low-pressure absorber (14)
Kind；
In the flue gas branch, combustion gas is burnt in the combustion chamber (2), and the combustion heat of generation is supplied to the generator (1),
The high-temperature flue gas of generation enters the solution preheater (17), and the medium temperature flue gas generated through the solution preheater (17) enters institute
Middle pressure evaporator (7) is stated, the low-temperature flue gas generated through medium pressure evaporator (7) is discharged by medium pressure evaporator (7)；
In the working medium branch, the gaseous working medium that the generator (1) generates enters rectifier (3), the phegma of generation into
Enter the condenser (4) condensation, the liquid refrigerant of generation is subcooled into the subcooler (5), subsequently into medium pressure working medium
Throttle valve (6) throttling, the middle pressure working medium of generation enters medium pressure evaporator (7) part and evaporates, subsequently into the separator
(8) gas-liquid separator is carried out, middle pressure gaseous working medium enters medium pressure absorber (12) and is absorbed, and middle pressure liquid refrigerant enters
The low pressure working fluid throttle valve (9) throttling, evaporates subsequently into the low pressure evaporator (10), the low-pressure gaseous working medium of generation into
Enter the subcooler (5) to be heated, be absorbed subsequently into the low-pressure absorber (14)；
In the solution branch, the concentrated solution after phegma and preheating enters the generator (1), and the high temperature after generation is dilute molten
Liquid returns to release sensible heat inside the generator (1) and temperature reduces, and throttles subsequently into medium pressure solution throttle valve (11),
Weak solution after throttling enters medium pressure absorber (12), and gaseous working medium is pressed in absorption and becomes intermediate solution, the centre
Solution throttles into the hypotonic solution throttle valve (13), and the intermediate solution after throttling enters the low-pressure absorber (14), inhales
It receives low-pressure gaseous working medium and becomes concentrated solution, the concentrated solution enters the fluid reservoir (15), subsequently into the solution pump
(16) it is pressurized；
In the hot water branch, return water increases by the hot water branch temperature and becomes water supply and be transported to heat user.
2. gas absorption heat pump system as described in claim 1, which is characterized in that the solution branch further includes described molten
Liquid preheater (17), pressurized concentrated solution enter medium pressure absorber (12), and pressure absorbs heat in absorption and temperature increases；Again
Into the solution preheater (17), high-temperature flue gas sensible heat is absorbed and temperature further increases；Finally enter the generator
(1)。
3. gas absorption heat pump system as described in claim 1, which is characterized in that the solution branch further includes described molten
Liquid preheater (17), pressurized concentrated solution initially enter the rectifier (3), and absorption distillation is warm and temperature increases；Then into
Enter medium pressure absorber (12), pressure absorbs heat in absorption and temperature continues to increase；Subsequently into the solution preheater (17),
Absorb high-temperature flue gas sensible heat and temperature further increases；Finally enter the generator (1).
4. gas absorption heat pump system as described in claim 1, which is characterized in that the concentrated solution of the generator (1) is certainly
The upper and dirty space for being filled through filler, the space are handed over the caloic that gaseous steam from bottom to top is directly contacted
It changes, while carrying out wall-type heat exchange with the high temperature weak solution after generation from bottom to top.
5. gas absorption heat pump system as described in claim 1, which is characterized in that the gaseous working medium of the rectifier (3)
The space filled with filler is flowed through from bottom to top, and the space is handed over the caloic that top-down phegma is directly contacted
It changes, while carrying out wall-type heat exchange with top-down hot water.
6. gas absorption heat pump system as described in claim 1, which is characterized in that the rectifier (3), gaseous working medium
The space filled with filler is flowed through from bottom to top, and the space is handed over the caloic that top-down phegma is directly contacted
It changes, while carrying out wall-type heat exchange with top-down pressurized concentrated solution.
7. gas absorption heat pump system as described in claim 1, which is characterized in that the evaporation of medium pressure evaporator (7)
Pressure can be by medium pressure throttling valve (6) according to local environment temperature real-time monitoring.
8. gas absorption heat pump system according to claim 1, which is characterized in that in the hot water branch, return water according to
It is secondary to pass through the condenser (4) and the low-pressure absorber (14), respectively absorption condensation heat and low pressure absorb it is hot after temperature gradually
It increases, becomes water supply and be conveyed to heat user.
9. gas absorption heat pump system according to claim 1, which is characterized in that in the hot water branch, return water according to
It is secondary to pass through the low-pressure absorber (14) and the condenser (4), absorb respectively low pressure absorb hot and cold it is solidifying hot after temperature gradually
It increases, becomes water supply and be conveyed to heat user.
10. gas absorption heat pump system according to claim 1, which is characterized in that it further include defrosting branch, it is described to remove
White branch includes defrosting regulating valve (18), and the both ends of defrosting regulating valve (18) are separately connected the low pressure working fluid throttle valve
(9) and the hypotonic solution throttle valve (13).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811277686.3A CN109579105B (en) | 2018-10-30 | 2018-10-30 | Gas absorption heat pump system |
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| CN109579105B CN109579105B (en) | 2020-10-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110274459A (en) * | 2019-07-25 | 2019-09-24 | 河南优备冷暖设备有限公司 | A kind of split type double dynamical air source heat pump for drying |
| CN113834249A (en) * | 2021-10-25 | 2021-12-24 | 无锡市锦华环境科技有限公司 | Automatic adjusting method and system for refrigeration energy of environmental chamber |
| CN114234471A (en) * | 2021-11-29 | 2022-03-25 | 中国科学院理化技术研究所 | Absorption type combined cooling and heating system |
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| CN107490209A (en) * | 2017-07-04 | 2017-12-19 | 天津城建大学 | A kind of cool and thermal power supply system of gas engine combination absorption heat pump |
| CN105674558B (en) * | 2016-02-16 | 2018-05-08 | 蓝焰高科（天津）燃气技术有限公司 | Gas engine drives steam compressed and absorption combined heat pump Hot water units operation method |
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| DE202012009471U1 (en) * | 2012-10-04 | 2014-01-10 | Stiebel Eltron Gmbh & Co. Kg | Heat pump unit with a reversible refrigeration circuit |
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| CN114234471A (en) * | 2021-11-29 | 2022-03-25 | 中国科学院理化技术研究所 | Absorption type combined cooling and heating system |
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|---|---|
| CN109579105B (en) | 2020-10-27 |
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