CN109667634A - Ammonia water mixture circulation system for low-grade heat power generation - Google Patents
Ammonia water mixture circulation system for low-grade heat power generation Download PDFInfo
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- CN109667634A CN109667634A CN201811469113.0A CN201811469113A CN109667634A CN 109667634 A CN109667634 A CN 109667634A CN 201811469113 A CN201811469113 A CN 201811469113A CN 109667634 A CN109667634 A CN 109667634A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/06—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using mixtures of different fluids
- F01K25/065—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using mixtures of different fluids with an absorption fluid remaining at least partly in the liquid state, e.g. water for ammonia
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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
- F25B15/04—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being ammonia evaporated from aqueous solution
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- 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
-
- 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
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
A kind of ammonia water mixture circulation system for low-grade heat power generation, it includes absorptive condenser, rich ammonia solution pipeline, solution pump, regenerator, heat source fluid runner, evaporator, gas-liquid separator, superheater, ammonium hydroxide mixed vapour pipeline, steam turbine, main generator, cooling water heat exchanger, absorb liquid pipeline, the hydraulic turbine, auxiliary generator, back pressure regulating valve, absorbing liquid spray thrower, the present invention promotes ammonium hydroxide mixed vapour to condense using chemical absorbing mode, liquid phase is present in the form stable of ammonium ion or complexing ammonia after reacting a part of ammonia with absorbent, the ammonia density in solution is significantly improved in the case where not increasing ammonia partial pressure in gas phase, so as to realize the condensation of ammonium hydroxide mixed vapour under low back pressure.Solution heats in evaporator, and as temperature is continuously improved, hydration ammonia, ammonium ion and complexing ammonia will decompose to give off ammonia, is regenerated absorbent while volatile component only has ammonia and water temperature changing evaporates.
Description
Technical field
The present invention relates to one kind with ammonia water mixture thermodynamic cycle, and more precisely using chemical absorbing mode makes
Ammonium hydroxide mixed vapour after being done work by steam turbine realizes the non-azeotropic mixed working medium heating power of condensation at normal temperature with lower back pressure
Circulation is mainly used for low-grade heat power generation.
Background technique
Compared with the single working medium Rankine circulation of fixed temperature evaporation, the alternating temperature evaporation process of non-azeotropic mixed working medium and aobvious
Heat source reaches preferably heat exchange matching, reduces the irreversible loss in heat transfer process, to obtain the higher thermal efficiency.Have
Studies have shown that the thermal efficiency of ammonia-water mixture Rankine circulation can reach 1.05~1.25 times of { Bao Han of steam Rankine circulation
It is bright, Ma Changwen, Wu Shaorong Ammonia water Rankine cycle Tsinghua University's journal (natural science edition), 1997. 37 (2):
108-109) }.Meanwhile ammonia water mixture can evaporate at a lower temperature, therefore be followed using the heating power of ammonia water mixture
Ring can use various middle-low temperature heat heat sources, realize the effective recycling of centering low-grade energy.So ammonium hydroxide mixes work
Matter power cycle has good thermodynamic property, environment friendly and economy.
But in the condensation process of power cycle, the characteristic of mixed working fluid alternating temperature condensation makes its temperature between cold source
With single working medium is inferior to, to cause biggish available energy loss.Kalina recycles { Kalina A I. Combined-cycle
system with novel bottoming cycle. Journal of Engineering for Gas Turbines
And Power. 1984,106 (7): 737-742 } ammonia-water mixture Rankine recycle on the basis of increase flash distillation and
Condensed absorbent system, preferably solves the problems, such as this.
Although Kalina circulation is greatly improved compared with Rankine circulation in thermal efficiency, system ratio
Rankine circulation is much more complex, has larger negative effect to its economy.Kalina circulates in the following aspects still and has larger
Room for improvement: (1) distill subsystem link it is more, cause greater loss；(2) heat exchange area is significantly larger than Rankine and follows
Ring, metal consumption are higher；(3) mixed vapour condensation back pressure is higher, limits the raising of the thermal efficiency.
Summary of the invention
The present invention provides a kind of ammonia water mixture circulation systems, can realize ammonia at normal temperature with lower back pressure
The condensation of water mixed vapour is recycled relative to existing Kalina, and the thermal efficiency further increases, and is conducive to improve low-grade heat power generation
Economy.
The present invention proposes a kind of ammonia water mixture circulation system for low-grade heat power generation, it includes that absorption is cold
Condenser, rich ammonia solution pipeline, solution pump, regenerator, heat source fluid runner, evaporator, gas-liquid separator, superheater, ammonium hydroxide are mixed
Close vapor line, steam turbine, main generator, cooling water heat exchanger, absorption liquid pipeline, the hydraulic turbine, auxiliary generator, backpressure regulation
Valve, absorbing liquid spray thrower, interconnected relationship are as follows: the steam (vapor) outlet of steam turbine and the steam inlet of absorptive condenser pass through
Pipeline is connected, and the low pressure ammonium hydroxide mixed vapour (steam exhaust) after acting enters absorptive condenser；It is arranged inside absorptive condenser
There is cooling water heat exchanger, absorbing liquid spray thrower, absorbing liquid spray thrower and absorption liquid pipe are provided at the top of absorptive condenser inner cavity
Road connection absorbs and is provided with back pressure regulating valve on liquid pipeline；Absorptive condenser bottom is communicated with rich ammonia solution pipeline, rich ammonia solution
Pipeline is connected to by solution pump with the tube side cold side input port of regenerator；Evaporator and overheat are provided in heat source fluid runner
The tube side cold side outlet port of device, regenerator is connected to evaporator inlet, and evaporator outlet is connected to gas-liquid separator entrance；Gas-liquid point
Device is provided with outlet at bottom and top exit.The top exit of gas-liquid separator is connected to superheater entrance, superheater outlet
It is connected to by ammonium hydroxide mixed vapour pipeline with the gas access of steam turbine, the ammonium hydroxide mixed vapour driving steam turbine of high temperature and pressure is done
Function, drives main generator power generation, and steam turbine gas vent is connected to absorptive condenser；The outlet at bottom of gas-liquid separator passes through suction
Liquid collecting tube road is connected to the shell side inlet of regenerator, and the shell-side outlet of regenerator is connected to the liquid inlet of the hydraulic turbine, the hydraulic turbine
Liquid outlet be connected to absorbing liquid spray thrower by back pressure regulating valve；High pressure absorbing liquid drives the hydraulic turbine to drive auxiliary generator hair
Electricity.
The specific feature of this programme is in addition, absorbing liquid is that a kind of can chemically react with ammonia generation containing at least one generates
The salt of ammonia or the aqueous solution of acid is complexed in ammonium ion.
Absorbing liquid be water, ammonia, phosphoric acid according to molar ratio 6:4:1 ratio mixing composition (NH4)xH3-xPO4/H2O/NH3Solution
(0 x≤3 <) are used as cycle operation medium.
Its course of work is: the steam (vapor) outlet of steam turbine is connected with the steam inlet of absorptive condenser by pipeline,
Low pressure ammonium hydroxide mixed vapour (steam exhaust) after acting enters absorptive condenser；The ammonium hydroxide mixed vapour of steam turbine gas vent has been
Low pressure steam exhaust is again introduced into circulation after condensing towards absorptive condenser.Absorbing in liquid pipeline is absorption identical with steam exhaust pressure
Liquid, absorbing liquid spray thrower injection of the absorbing liquid at the top of absorptive condenser nebulize, are sufficiently mixed with steam exhaust, are inhaled by being built in
It receives the cooling water heat exchanger inside condenser to be cooled to room temperature mixture, the water in steam exhaust is cooled first and condenses, and makes to inhale
Receive liquid dilution, the ammonia in steam exhaust before this in absorbing liquid salt or complex reaction occurs for acid or neutralization reaction generates more stable network
Ammonia or ammonium ion are closed, after chemically reacting saturation, some free ammonia is dissolved in the water, and is formed by condensate liquid as rich ammonia
Solution is deposited on the bottom of absorptive condenser, enters reheater tubes after being pressurized to high pressure by solution pump by rich ammonia solution pipeline
It is preheated after journey cold side input port, with absorbing liquid heat exchange；Rich ammonia solution after preheating enters to be connected with regenerator cold side outlet port
Evaporator is heated up by the hot fluid heats in heat source fluid runner, the dissolved ammonia, complexing as temperature increases, in rich ammonia solution
Ammonia and ammonium ion are successively evaporated, while the partial vapour pressure of water is also continuously increased, if heat source allows, the setting of solution final temperature is answered
To ensure to evaporate whole ammonia and most of water for degree, remaining liquid phase is the absorbing liquid of high temperature and pressure；Gas-liquid mixture enters gas
After liquid/gas separator, be separated into dry flue gas and solution, dry flue gas ingredient is ammonium hydroxide mixed vapour, from the outlet at the top of separator into
Enter connected superheater entrance to further heat up, solution is absorbing liquid, is deposited on separator bottom under the effect of gravity
Portion enters regenerator shell side hot side entrance by absorbing liquid pipeline, absorbing liquid is herein and from absorption condensation under high drive
The rich ammonia solution of device exchanges heat, and recycles thermal energy；High pressure absorbing liquid drives the hydraulic turbine to drive auxiliary generator power generation, pressure recovery
Can, hydraulic turbine outlet connects back pressure regulating valve, and pressure is adjusted to absorptive condenser operating pressure, the other end of back pressure regulating valve
Piping connection is to absorbing liquid spray thrower.
The beneficial effects of the present invention are: the present invention promotes ammonium hydroxide mixed vapour to condense using chemical absorbing mode, make one
Liquid phase is present in the form stable of ammonium ion or complexing ammonia after dividing ammonia to react with absorbent, thus not increasing ammonia in gas phase
Gas significantly improves the ammonia density in solution in the case where dividing, be allowed to identical as the ammonium hydroxide equivalent proportion before turbine.Solution is evaporating
Heated in device, as temperature is continuously improved, hydration ammonia, ammonium ion and complexing ammonia will decompose to give off ammonia, volatile component (only
Have ammonia and water) alternating temperature evaporation while be regenerated absorbent, thus constitute it is substantially similar, formal to Kalina circulation
Similar novel thermodynamic cycle is recycled with Rankine.Comparison Kalina circulation and chemical absorbing formula non-azeotropic mixed working medium follow
Ring, chemical absorbing formula non-azeotrope mix work circulation and recycle the heat absorption that the decorum is close, as can obtaining with Kalina in the boiler
Efficiency, and it is close with Rankine circulation in condensation process, there can be lesser loss, this illustrates that this patent is improved new
Formula circulates on the basis of Kalina circulation becomes boiling point mixed working fluid and is provided with the simple feature of Rankine circulation form significantly
Kalina circulation is simplified, there is higher cycle efficieny.
In addition, the efficiency of circulation is increased with turbine outlet pressure and is reduced.When turbine inlet pressure is constant, and outlet pressure
When increase, since the constant pressure difference of other conditions reduces, so turbine capacity for work declines.The ammonium hydroxide of chemical absorbent low concentration
More easily absorbing ammonia can be such that ammonia rapidly condenses out, this can make new-type circulation use lower turbine back pressure, make
Flat useful work, which exports, to be increased.
The overbottom pressure of absorbent solution and preheating are recycled, and loss is reduced, and improve system thermal efficiency, the circulation and existing
Some Kalina circulations or Organic Rankine Cycle are compared has the higher thermal efficiency under the not high operating condition of heat source temperature, is suitble to
It generates electricity for low grade residual heat.The prior art does working medium using water, ammonia mixture, and using ammonia, dissolution characteristics are realized in water
The condensation of ammonium hydroxide mixed vapour after acting needs higher back pressure to guarantee the dissolution of ammonia, and high back pressure leads to system effectiveness
It reduces.Compared with prior art, using at least one chemical reaction generation ammonium ion or complexing ammonia can occur with ammonia for the present invention
Salt or acid aqueous solution, absorption of the ammonia by solution is promoted using chemical absorbing mode, makes a part of ammonia and absorbent
Liquid phase is present in the form stable of ammonium ion or complexing ammonia after reaction, remaining free ammonia is inhaled in a manner of dissolution by solution again
It receives.Compared with comparing patent, the condensation of ammonium hydroxide mixed vapour can be realized with lower back pressure under, with the reduction of back pressure, heat
Efficiency is improved.
Detailed description of the invention
Fig. 1 is present system structural schematic diagram.
In figure: 1, absorptive condenser；2, rich ammonia solution；3, rich ammonia solution pipeline；4, solution pump；5, regenerator；6, heat source
Fluid course；7, evaporator；8, gas-liquid separator；9, superheater；10, ammonium hydroxide mixed vapour pipeline；11, steam turbine；12, main hair
Motor；13, cooling water heat exchanger；14, absorbing liquid；15, liquid pipeline is absorbed；16, the hydraulic turbine；17, auxiliary generator；18, back pressure tune
Save valve；19, absorbing liquid spray thrower.
Specific embodiment
As shown in Figure 1, a kind of ammonia water mixture circulation system for low-grade heat power generation, it includes that absorption is cold
Condenser 1, rich ammonia solution pipeline 3, solution pump 4, regenerator 5, heat source fluid runner 6, evaporator 7, gas-liquid separator 8, superheater
9, ammonium hydroxide mixed vapour pipeline 10, steam turbine 11, main generator 12, cooling water heat exchanger 13, absorption liquid pipeline 15, the hydraulic turbine
16, auxiliary generator 17, back pressure regulating valve 18, absorbing liquid spray thrower 19, interconnected relationship is as follows: the steam of steam turbine 11 goes out
Mouth is connected with the steam inlet of absorptive condenser 1 by pipeline, and the low pressure ammonium hydroxide mixed vapour (steam exhaust) after acting, which enters, to be inhaled
Receive condenser 1；It is internally provided with cooling water heat exchanger 13 in absorptive condenser 1, absorptive condenser is provided with suction at the top of 1 inner cavity
Liquid spray thrower 19 is received, absorbing liquid spray thrower 19 is connected to liquid pipeline 15 is absorbed, and is absorbed and is provided with back pressure regulating valve on liquid pipeline 15
18；1 bottom of absorptive condenser is communicated with rich ammonia solution pipeline 3, and rich ammonia solution pipeline 3 passes through the tube side of solution pump 4 and regenerator 5
Cold side input port connection.Be provided with evaporator 7 and superheater 9 in heat source fluid runner 6, the tube side cold side outlet port of regenerator 5 with
The connection of 7 entrance of evaporator, the outlet of evaporator 7 are connected to 8 entrance of gas-liquid separator；Gas-liquid separator 8 be provided with outlet at bottom and
Top exit.The top exit of gas-liquid separator 8 is connected to 9 entrance of superheater, and the outlet of superheater 9 passes through ammonium hydroxide mixed vapour pipe
Road 10 is connected to the gas access of steam turbine 11, and the ammonium hydroxide mixed vapour driving steam turbine 11 of high temperature and pressure does work, and drives main hair
Motor 12 generates electricity, and steam turbine gas vent is connected to absorptive condenser 1；The outlet at bottom of gas-liquid separator 8 is by absorbing liquid pipe
Road 15 is connected to the shell side inlet of regenerator 5, and the shell-side outlet of regenerator 5 is connected to the liquid inlet of the hydraulic turbine 16, the hydraulic turbine
16 liquid outlet is connected to by back pressure regulating valve 18 with absorbing liquid spray thrower 19；High pressure absorbing liquid drives the hydraulic turbine to drive auxiliary hair
Motor 17 generates electricity.
Absorbing liquid is containing at least one salt or acid that chemical reaction can occur with ammonia and generate ammonium ion or complexing ammonia
Aqueous solution, in particular to water, ammonia, phosphoric acid mix according to the ratio of molar ratio 6:4:1 and form (NH4)xH3-xPO4/H2O/NH3Solution
(0 x≤3 <) are used as cycle operation medium.
Its course of work is: the steam (vapor) outlet of steam turbine 11 is connected with the steam inlet of absorptive condenser 1 by pipeline
Logical, the low pressure ammonium hydroxide mixed vapour (steam exhaust) after acting enters absorptive condenser 1；The ammonium hydroxide of 11 gas vent of steam turbine, which mixes, to be steamed
Gas has been low pressure steam exhaust, is again introduced into circulation after condensing towards absorptive condenser 1.Absorbing in liquid pipeline 15 is and steam exhaust pressure phase
Same absorbing liquid 14, absorbing liquid spray thrower 19 injection of the absorbing liquid 14 at 1 top of absorptive condenser nebulizes, sufficiently mixed with steam exhaust
It closes, is cooled to room temperature mixture by being built in the cooling water heat exchanger 13 inside absorptive condenser 1, the water in steam exhaust is first
It is cooled and condense, dilute absorbing liquid 14, the ammonia in steam exhaust before this in absorbing liquid 14 salt or acid generation complex reaction or
Neutralization reaction generates more stable complexing ammonia or ammonium ion, and after chemically reacting saturation, some free ammonia is dissolved in water
In, condensate liquid is formed by as rich ammonia solution 2, is deposited on the bottom of absorptive condenser 1, by rich ammonia solution pipeline 3 by solution
Pump 4 enters 5 tube side cold side input port of regenerator after being pressurized to high pressure, is preheated after exchanging heat with absorbing liquid 14；Rich ammonia after preheating is molten
Liquid 2 enters the evaporator 7 being connected with 5 cold side outlet port of regenerator, is heated up by the hot fluid heats in heat source fluid runner 6, with
Temperature increase, the dissolved ammonia, complexing ammonia and ammonium ion in rich ammonia solution 2 are successively evaporated, while the partial vapour pressure of water is not yet
Disconnected to increase, if heat source allows, setting for solution final temperature should be to ensure to evaporate whole ammonia and most of water as degree, remaining liquid phase
For the absorbing liquid 14 of high temperature and pressure；
Gas-liquid mixture enters after gas-liquid separator 8, is separated into dry flue gas and solution, and dry flue gas ingredient is that ammonium hydroxide mixing is steamed
Gas is further heated up from the outlet at 8 top of gas-liquid separator into connected 9 entrance of superheater, and solution is to absorb
Liquid 14 is deposited on 8 bottom of gas-liquid separator under the effect of gravity, under high drive, enters backheat by absorbing liquid pipeline 15
5 shell side hot side entrance of device, absorbing liquid 14 exchange heat with the rich ammonia solution 2 from absorptive condenser 1 herein, recycle thermal energy；It is high
Press the absorbing liquid driving hydraulic turbine 16 that auxiliary generator 17 is driven to generate electricity, pressure recovery energy, the outlet of the hydraulic turbine 16 connection back pressure regulating valve
18, pressure is adjusted to 1 operating pressure of absorptive condenser, the other end piping connection of back pressure regulating valve 18 to absorbing liquid spray thrower
19。
Water, ammonia, phosphoric acid form (NH according to the ratio mixing of molar ratio 6:4:14)xH3-xPO4/H2O/NH3Solution (0 < x≤
3)
As cycle operation medium, which is lower than 30 DEG C in temperature, and pressure is liquid, i.e. absorptive condenser when being higher than 0.1MPa
The rich ammonia solution 2 of 1 bottom, the solution are forced into 10MPa through rich ammonia solution pipeline 3, by solution pump 4, are entered by regenerator 5 and are steamed
Sending out device 7 constantly has ammonia and water evaporation by the hot fluid heats in heat source fluid channel 6 to 200 DEG C in heating process, flow into
When gas-liquid separator 8, the ammonium hydroxide mixed vapour that gas phase is about molar ratio 2:1, liquid phase contains minimal amount of NH4H2PO4, mainly
H3PO4And H2O, molar ratio 1:4, liquid phase, that is, absorbing liquid 14.
By the ammonium hydroxide mixed vapour separated at the top of gas-liquid separator 8, enthalpy 1418.6kJ/kg, mass flow
38.5kg/s is heated to 300 DEG C, enthalpy 2413.4kJ/kg, superheating process consumes heat source about 40MW into superheater 9.
Mixed vapour from superheater come out after, through ammonium hydroxide mixed vapour pipeline 10 enter steam turbine 11, be expanded to 0.1MPa,
Near 63 DEG C of temperature, output shaft work drives main generator 12 to generate electricity, electromotive power output 24MW.
Absorbing liquid 14 enters regenerator by absorbing liquid pipeline 15 by 8 bottom of gas-liquid separator, the rich ammonia solution 2 with 30 DEG C
It exchanges heat, is cooled to 35 DEG C, backheat 43MW by 200 DEG C, rich ammonia solution is preheated to 133 DEG C, the rich ammonia solution after preheating
Endothermic power when evaporator 7 evaporates is about 72MW.
Absorbing liquid 14 drives auxiliary generator power generation by into the hydraulic turbine 16, being decompressed to 0.1MPa after regenerator 5
0.7MW, the about half of 4 wasted work rate 1.5MW of solution pump.
The ammonium hydroxide mixed vapour steam exhaust of the 0.1MPa come out from steam turbine 11, ammonia and water containing molar ratio about 2:1, normally
In the case of can not be in 30 DEG C of at a temperature of total condensation.When steam exhaust is mixed with absorbing liquid 14 in 19 exit of absorbing liquid spray thrower
Afterwards, have in gas phase most of ammonia first in liquid phase phosphoric acid or ammonium dihydrogen phosphate react, it is cooling by cooling water heat exchanger 13
Form stable solution afterwards, the ratio of free ammonia and water is actually converted to 1:6, and the ammonia spirit saturated vapour pressure of formation is much
Lower than 0.1MPa, thus can liquefy completely within the temperature range of 30 DEG C to 50 DEG C.The temperature of above-mentioned the consumed heat source of circulation
No more than 350 DEG C, process loss is considered, system totality thermoelectric conversion efficiency reaches 21.7%, than the effect of existing low temperature exhaust heat boiler
Rate is high by 3% or so.
Claims (3)
1. a kind of ammonia water mixture circulation system for low-grade heat power generation, it is characterized in that it includes absorption condensation
Device, rich ammonia solution pipeline, solution pump, regenerator, heat source fluid runner, evaporator, gas-liquid separator, superheater, ammonium hydroxide mixing
Vapor line, steam turbine, main generator, cooling water heat exchanger, absorption liquid pipeline, the hydraulic turbine, auxiliary generator, back pressure regulating valve,
Absorbing liquid spray thrower, interconnected relationship are as follows: the steam (vapor) outlet of steam turbine and the steam inlet of absorptive condenser pass through pipe
Road is connected；It is internally provided with cooling water heat exchanger in absorptive condenser, absorptive condenser is provided with absorbing liquid at the top of inner cavity
Spray thrower, absorbing liquid spray thrower and absorbing liquid pipeline connection absorb and are provided with back pressure regulating valve on liquid pipeline；Absorptive condenser bottom
Portion is communicated with rich ammonia solution pipeline, and rich ammonia solution pipeline is connected to by solution pump with the tube side cold side input port of regenerator；In heat source
Evaporator and superheater are provided in fluid course, the tube side cold side outlet port of regenerator is connected to evaporator inlet, and evaporator goes out
Mouth is connected to gas-liquid separator entrance；Gas-liquid separator is provided with outlet at bottom and top exit；
The top exit of gas-liquid separator is connected to superheater entrance, and superheater outlet passes through ammonium hydroxide mixed vapour pipeline and steamer
The gas access of machine is connected to, and the ammonium hydroxide mixed vapour driving steam turbine acting of high temperature and pressure drives main generator power generation, steam turbine
Gas vent is connected to absorptive condenser；The outlet at bottom of gas-liquid separator passes through the shell side inlet of absorbing liquid pipeline and regenerator
Connection, the shell-side outlet of regenerator be connected to the liquid inlet of the hydraulic turbine, the liquid outlet of the hydraulic turbine by back pressure regulating valve and
The connection of absorbing liquid spray thrower；High pressure absorbing liquid drives the hydraulic turbine to drive auxiliary generator power generation.
2. the ammonia water mixture circulation system according to claim 1 for low-grade heat power generation, it is characterized in that
Absorbing liquid be it is a kind of containing it is at least one can with ammonia occur chemical reaction generate ammonium ion or be complexed ammonia salt or acid it is water-soluble
Liquid.
3. the ammonia water mixture circulation system according to claim 2 for low-grade heat power generation, it is characterized in that
Absorbing liquid be water, ammonia, phosphoric acid according to molar ratio 6:4:1 ratio mixing composition (NH4)xH3-xPO4/H2O/NH3Solution (0 < x≤
3) it is used as cycle operation medium.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110374704A (en) * | 2019-06-06 | 2019-10-25 | 东南大学 | Low grade heat energy driving electricity generation system and working method based on reversible chemical reaction |
| CN111852598A (en) * | 2019-04-30 | 2020-10-30 | 中国船舶重工集团公司第七一一研究所 | Ship waste heat recovery power generation system |
| CN115289448A (en) * | 2022-08-11 | 2022-11-04 | 上海发电设备成套设计研究院有限责任公司 | Comprehensive energy station of ammonia water working medium coupled fuel and operation method thereof |
| CN117469848A (en) * | 2023-12-28 | 2024-01-30 | 安徽普泛能源技术有限公司 | Energy-saving condensation absorber and refrigeration system and process |
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