CN102242985B - Mixed working medium thermal circulating system and method for power and refrigeration cogeneration - Google Patents
Mixed working medium thermal circulating system and method for power and refrigeration cogeneration Download PDFInfo
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Abstract
The invention discloses a mixed working medium thermal circulating system and method for power and refrigeration cogeneration. In the system, an ammonia and water mixture is utilized as a working medium, and the middle/low temperature heat is utilized as a heat source. The method comprises the following steps: heating the ammonia water working medium to obtain superheated steam; introducing the superheated steam into a turbine to do work; introducing the exhaust steam of the turbine into a rectification tower to supply heat for the rectification process; introducing the ammonia generated by the rectification tower into an evaporator after condensing, undercooling and throttling; throttling a dilute solution subjected to waste heat recovery, introducing the throttled dilute solution into a absorber, mixing with the ammonia from the evaporator and condensing; and introducing a heat source into a steam generator firstly, and then introducing the heat source into a waste heat solution heat exchanger. The steam generator adopts the ammonia water strong solution as the working medium, the variable temperature evaporation feature of the ammonia water strong solution is well matched with the temperature of the heat source, thus the irreversible loss of the heat exchange process in the steam generator is reduced; simultaneously the exhaust steam of the turbine directly enters into the rectification tower to supply the rectifying heat without condensation, thus the irreversible loss caused by the variable temperature condensation of the ammonia water working medium is avoided; and the mixed type heat transfer is adopted, thus the irreversible loss of the heat exchange process is reduced.
Description
Technical field
The present invention relates to energy technology field, particularly a kind of circulation system and method for the mixed working fluid power and refrigeration cogeneration take ammonia water mixture as working medium.
Background technology
China's industrial energy consumption accounts for 2/3rds of national total energy consumption, but efficiency of energy utilization is low, and with the form discharging of middle Low Temperature Thermal, the waste that this not only causes the energy also has thermal pollution to environment more than 50%.Recycle these waste heats and have remarkable effect for improving China's efficiency of energy utilization.The circulatory system of the power and refrigeration cogeneration that ammonia absorption type refrigeration circulation, ammoniacal liquor power cycle and ammonia absorption type refrigeration are combined with power cycle is exactly to utilize the typical circulation system of low-temperature heat source.
In the recycling process of centering low-temperature heat source, mainly comprise following several technology:
1, ammonia absorption type refrigeration circulation: the ammonia absorption type refrigeration circulation can utilize tow taste heat to freeze, low temperature exhaust heat drives the rectifying column operation, concentrated ammonia solution is made pure ammonia and dilute ammonia solution, pure ammonia is condensed into ammoniacal liquor in condenser, ammoniacal liquor enters evaporimeter through behind the reducing pressure by regulating flow, sweat cooling, and the ammonia after the evaporation is absorbed by the weak solution from the rectifying tower reactor, be finally converted into concentrated solution, enter rectifying column and finish circulation.Main Problems is, rectifying column reboiler endothermic temperature is lower, and the power waste heat supply temperature is higher, and the rectifying column irreversible loss is large, and system effectiveness is low.
2, water vapour Rankine cycle: the Rankine cycle technology maturation take water as single working medium, but at evaporation stage, because the evaporation at constant temperature characteristic of water, it is bad that itself and thermal source are mated, and caused very large irreversible loss, and efficient is lower.
3, the Rankine cycle of zeotrope working medium: the employing zeotrope is the Rankine cycle of working medium (such as ammonia water mixture), utilize the alternating temperature evaporation characteristic of working medium, improve the Temperature Matching of evaporation process working medium and thermal source, greatly reduced the irreversible loss of this process.But mixed working fluid is the alternating temperature condensation in condensation process, and this makes itself and low-temperature receiver (be generally cooling water, difference variation is little) Temperature Matching situation variation, and irreversible loss is greater than the constant-temperature condensation process of single working medium.
4, Ka Linna circulation: the Ka Linna that is proposed the eighties in 20th century by Ka Linna circulates, it is absorption power cycle, take ammonia water mixture as working medium, replace conventional condenser with condensate fractionation unit (comprising regenerator, flash tank, low-pressure condenser, high pressure condenser etc.), reduced the irreversible loss of condensation process.Therefore native system had both reduced the irreversible loss of evaporation process by the alternating temperature evaporation, the irreversible loss of having avoided the alternating temperature condensation to cause by the condensate fractionation unit again, i.e. evaporation, the condensation process improvement that all is improved.But the ammonia of flash tank high concentration out has refrigerating capacity in this circulation, and this point does not obtain utilizing at this, and therefore, this system awaits further to improve, in order to take full advantage of acting, the refrigerating capacity of working medium.
5, absorption power refrigeration combined-circulation (Absorption Combined Power/CoolingCycle, APC): the APC that is proposed by the Zheng Dan magnitude circulates, basis in the Ka Linna circulation adds a process of refrigerastion (having increased the equipment such as condenser, choke valve, evaporimeter) to take full advantage of the refrigerating capacity of high strength ammonia, replace flash tank to increase the purity of ammonia with rectifying column simultaneously, make its refrigerating capacity larger.System has increased again cold output on the basis of acting, increased the thermal efficiency, also makes system more flexible simultaneously.But still there is the problem that the turbine exhaust temperature is high, loss is large in the APC circulation.
6, the just contrary coupling circulation system of the cross still state of the power and refrigeration cogeneration of series, parallel, series-parallel connection: by propositions such as Zhang Na, Liu Mengs, on the bases such as Ka Linna circulation, APC circulation, by adjusting working medium concentration, improving the mode such as internal system connection, whole efficiency is improved a lot.But still have following deficiency: the ammoniacal liquor concentrated solution enters the turbine acting in the train after pervaporation is overheated, and steam discharge condensation process and sink temperature coupling are bad, and larger irreversible loss is arranged; Ammoniacal liquor weak solution precession power road in the parallel system, bad with the thermal source coupling in the evaporation process, larger irreversible loss is arranged; Equipment is more in the combined hybrid system, and adjustment process is comparatively complicated, is not easy to operation.
Present mixed working fluid circulation is main mainly with generating greatly, and refrigerating capacity is relatively less, and the turbine exhaust temperature is high, and the difficult problem of exhaust steam waste heat utilization difficulty all is not solved.
Summary of the invention
The technical problem that (one) will solve
Utilize the shortcoming of method in order to overcome existing middle-low temperature heat, the present invention proposes a kind of circulation system and method for mixed working fluid power and refrigeration cogeneration, to solve in the kind of refrigeration cycle in large, the single working medium power generation cycle of rectifying column reboiler heat transfer temperature difference the problem such as the large and mixed working fluid power generation cycle turbine steam discharge condensation temperature height of working medium evaporation process heat transfer temperature difference.
(2) technical scheme
For achieving the above object, the present invention proposes a kind of circulation system of mixed working fluid power and refrigeration cogeneration, this system comprises separator (1), high-pressure solution pump (2), hypotonic solution pump (3), high-pressure solution heat exchanger (4), hypotonic solution heat exchanger (5), steam generator (6), waste heat solution heat exchanger (7), turbine (8), rectifying column (9), condenser (10), subcooler (11), ammonia choke valve (12), evaporimeter (13), solution choke valve (14) and absorber (15), wherein absorber (15) is connected with separator (1), separator (1) is connected to high-pressure solution pump (2) and hypotonic solution pump (3), high-pressure solution pump (2) connects the high-pressure solution heat exchanger (4) on power road, is steam generator (6) and turbine (8) afterwards; Hypotonic solution pump (3) connects hypotonic solution heat exchanger (5) and the waste heat solution heat exchanger (7) on the road of freezing successively; Turbine (8) directly links to each other with rectifying column (9) respectively with waste heat solution heat exchanger (7), the top of rectifying column (9) connects condenser (10), subcooler (11), ammonia choke valve (12) and evaporimeter (13) successively, and the bottom of rectifying column (9) connects high-pressure solution heat exchanger (4), hypotonic solution heat exchanger (5), solution choke valve (14) and absorber (15) successively.
In the such scheme, described separator (1) is part flow arrangement, and the quality shunting is carried out in the working medium logistics, and its entrance is connected with the hot side outlet of absorber (15), and outlet is connected 3 with high-pressure solution pump (2) with the hypotonic solution pump respectively) be connected.
In the such scheme, described high-pressure solution pump (2) and hypotonic solution pump (3) are liquid pressing equipment, are used for improving fluid pressure; High-pressure solution pump (2) is connected between separator (1) and the high-pressure solution heat exchanger (4), and hypotonic solution pump (3) is connected between separator (1) and the hypotonic solution heat exchanger (5).
In the such scheme, described high-pressure solution heat exchanger (4), hypotonic solution heat exchanger (5), steam generator (6) and waste heat solution heater (7) are heat transmission equipments, for the exchange heat that realizes between hot and cold logistics; Wherein: the hot side of high-pressure solution heat exchanger (4) is imported and exported and is connected 5 with rectifying column (9) taphole with the hypotonic solution heater respectively) hot side entrance is connected, and the cold side import and export are connected with steam generator cold side entrance with high-pressure solution pump (2) respectively; The hot side outlet of hypotonic solution heat exchanger (5) is connected with absorber (15) solution inlet port, and cold side is imported and exported and to be connected 7 with hypotonic solution pump (4) with the waste heat solution heat exchanger respectively) the cold side import is connected; The hot side outlet of steam generator (6) is connected with the hot side-entrance of waste heat solution heat exchanger (7), and the cold side outlet is connected with turbine (8) entrance; The outlet of waste heat solution heat exchanger (7) cold side connects rectifying column (9), and the heat of steam generator (6) input is industrial exhaust heat or solar energy.
In the such scheme, described turbine (8) is an acting device, the HTHP ammonia vapor expands therein and realizes externally acting, turbine (8) is imported and exported respectively and is connected 9 with the outlet of steam generator (6) cold side with rectifying column) be connected, turbine (8) steam discharge directly enters rectifying column (9).
In the such scheme, described rectifying column (9) is used for that ammonia and water are carried out rectifying and separates, and its top is connected with a condenser (10), and the dense ammonia steam-condensation that condenser (10) is used for the rectifying separation is obtained is as refrigeration working medium; Rectifying institute calorific requirement is from turbine (8) exhausted spare heat, and the dilute ammonia solution of output is connected in high-pressure solution heat exchanger (4) at the bottom of the tower.
In the such scheme, described subcooler (11) is heat transmission equipment, and hot side is imported and exported and connected respectively condenser (10) and choke valve (12), and cold side is imported and exported and connected respectively evaporimeter (13) and absorber (15); Ammoniacal liquor from condenser (10) cools off in this cryogenic refrigeration working medium by evaporimeter (13) outlet.
In the such scheme, described ammonia choke valve (12) is the expansion dropping equipment, and ammoniacal liquor is realized step-down, cooling by throttling, and its import and export are connected 13 with subcooler (11) with evaporimeter respectively) be connected.
In the such scheme, described evaporimeter (13) is realized cold output for evaporation that refrigeration working medium solution is absorbed heat therein, and its import and export are connected 11 with ammonia choke valve (12) with subcooler respectively) be connected.
In the such scheme, described absorber (15) is made of blender and condenser, and the logistics of variable concentrations working medium mixes in blender first, and then total condensation is liquid in condenser; The hot side of absorber (15) comprises that cold side is cooling water from the ammonia steam of subcooler (11) with from the weak solution of solution choke valve (14).
In the such scheme, described solution choke valve (14) connects hypotonic solution heat exchanger (5) and absorber (15).
In the such scheme, this system has acting circulation and a kind of refrigeration cycle, the acting circulation is take ammonia water mixture as working medium, to send into the acting of expanding in the steam turbine (8) at the hyperthermia and superheating ammonia vapor that steam generator (6) generates, rectifying column (9) and absorber (15) also are the composite devices of these two circulations for the tie point of acting circulation and kind of refrigeration cycle simultaneously.
For achieving the above object, the present invention also provides a kind of thermal circulation method of mixed working fluid power and refrigeration cogeneration, and the method becomes superheated steam with the ammonia-water mixture thermal conversion, enters turbine acting generating; The turbine steam discharge enters rectifying column, obtains dense ammonia steam and weak aqua ammonia, wherein realizes cold output and generates dense ammonia steam as refrigeration working medium behind the dense ammonia steam-condensation, is condensed into ammonia-water mixture with dense ammonia vapor mixing after the weak aqua ammonia pressurization.
In the such scheme, the method specifically comprises: absorber (15) concentrated solution S1 out first is split into two gangs of S2 and S7 through separator (1), S2 precession power road wherein, the cold road of S7 system, S2 is advanced high-pressure solution heat exchanger (4) after high-pressure solution pump (2) pressurization, with the weak solution S11 heat exchange from rectifying column (9), then enter steam generator (6) evaporation and enter turbine (8) acting of expanding after overheated, turbine (8) not condensation of steam discharge directly enters rectifying column (9); Another burst concentrated solution S7 passes through hypotonic solution heat exchanger (5) and waste heat solution heat exchanger (7) heating successively after hypotonic solution pump (3) pressurization, enter at last rectifying column (9); In rectifying column (9), from the steam discharge S6 of turbine (8) and the mixed heat transfer that directly carries out contact from the concentrated solution S7 of waste heat solution heat exchanger (7), in tower, be separated into tower reactor weak solution S11 and cat head ammonia steam S15; Tower reactor weak solution S11 successively flow through high-pressure solution heat exchanger (4) and hypotonic solution heat exchanger (5), behind solution choke valve (14) reducing pressure by regulating flow, enter absorber (15) again, after cat head ammonia steam S15 enters condenser (10) and is condensed into liquefied ammonia S16, enter subcooler (11), after the low temperature ammonia steam S19 heat exchange that comes flash-pot (13), formation has the liquefied ammonia S17 of certain degree of supercooling, and S17 becomes low pressure liquefied ammonia S18 through choke valve (12) reducing pressure by regulating flow and enters evaporimeter (13) sweat cooling again; Become the ammonia steam S20 with certain degree of superheat behind the low temperature ammonia steam S19 process subcooler (11), enter at last absorber (15), absorbed by weak solution, again form concentrated solution S1 and enter next circulation.
(3) beneficial effect
Can find out that from technique scheme the present invention has following beneficial effect:
1, the circulation system of this mixed working fluid power and refrigeration cogeneration provided by the invention and method take middle low-grade heat as thermal source, both can be industrial exhaust heats, also can be the regenerative resources of low temperature in the solar energy etc., to reach the purpose of energy-saving and emission-reduction.
2, the circulation system of this mixed working fluid power and refrigeration cogeneration provided by the invention and method, generating working medium adopts the ammoniacal liquor concentrated solution, and evaporation stage can be mated better with heat source temperature, reduces irreversible loss; The turbine steam discharge is without condensation, but directly advances at the bottom of the rectifying tower, cancelled the tower reactor of traditional rectifying column, provides rectifying institute calorific requirement on the one hand, on the other hand also as the part charging of rectifying column, reduced the irreversible loss that the condensation of turbine steam discharge alternating temperature causes.
3, the circulation system of this mixed working fluid power and refrigeration cogeneration provided by the invention and method utilize system integration principles to realize the cascade utilization of heat energy, have improved energy and have utilized level.It is also overheated with the ammoniacal liquor heating evaporation that middle low-temperature heat quantity is introduced in the steam generator, enters the waste heat solution heat exchanger again, and heating is as the concentrated solution of rectifying column charging, and through cascade utilization, exhaust gas temperature has obtained remarkable reduction.Pass through first high-pressure solution heat exchanger preheating concentrated solution before steam generator from the weak solution of tower bottom of rectifying tower, enter the hypotonic solution heat exchanger again, preheating enters the concentrated solution of rectifying column, and the exhaust heat stepped utilization of internal system is raised the efficiency.
4, the circulation system of this mixed working fluid power and refrigeration cogeneration provided by the invention and method, flow process is simple, and each monotechnics is comparatively ripe, is convenient to industrialized utilization.
Description of drawings
Fig. 1 is the schematic diagram of the circulation system of mixed working fluid power and refrigeration cogeneration provided by the invention.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
The flow process of embodiment as shown in Figure 1.Wherein G1 to G3 represents the heat-carrying agent of thermal source, and W1 to W4 represents cooling water, and S1 to S20 represents cycle fluid.G1 adopts 400 ℃ of flue gases herein, and basic working medium S1 is that mass fraction is 34% ammonia water mixture.Capital equipment comprises separator (1), high-pressure solution pump (2), hypotonic solution pump (3), high-pressure solution heat exchanger (4), hypotonic solution heat exchanger (5), steam generator (6), waste heat solution heat exchanger (7), turbine (8), rectifying column (9), condenser (10), subcooler (11), ammonia choke valve (12), evaporimeter (13), solution choke valve (14), absorber (15).Wherein absorber (15) links to each other with separator (1), separator (1) is connected to high-pressure solution pump (2) and hypotonic solution pump (3), high-pressure solution pump (2) connects the high-pressure solution heat exchanger (4) on power road, is steam generator (6) and turbine (8) afterwards; Hypotonic solution pump (3) connects hypotonic solution heat exchanger (5) and the waste heat solution heat exchanger (7) on the road of freezing successively.Turbine (8) directly links to each other with rectifying column (9) with waste heat solution heat exchanger (7), the top of rectifying column (9) connects condenser (10), subcooler (11), ammonia choke valve (12) and evaporimeter (13) successively, and the bottom of rectifying column (9) connects high-pressure solution heat exchanger (4), hypotonic solution heat exchanger (5), solution choke valve (14) and absorber (15) successively.Be that absorber and rectifying column are the shared device unit on power road and refrigeration road.
Idiographic flow is: absorber (15) concentrated solution S1 out first is split into two gangs of S2 and S7 through separator (1), S2 precession power road wherein, the cold road of S7 system.S2 is advanced high-pressure solution heat exchanger (4) after high-pressure solution pump (2) pressurization, with the weak solution S11 heat exchange from rectifying column (9), then enter steam generator (6) evaporation and enter turbine (8) acting of expanding after overheated, turbine (8) not condensation of steam discharge directly enters rectifying column (9).Another burst concentrated solution S7 passes through hypotonic solution heat exchanger (5) and waste heat solution heat exchanger (7) heating successively after hypotonic solution pump (3) pressurization, enter at last rectifying column (9).In rectifying column (9), from the steam discharge S6 of turbine (8) with identical from the concentrated solution S7 composition of waste heat solution heat exchanger (7), just state is different, and the mixed heat transfer that can carry out direct contact type is separated into tower reactor weak solution S11 and cat head ammonia steam S15 in tower.Tower reactor weak solution S11 successively flow through high-pressure solution heat exchanger (4) and hypotonic solution heat exchanger (5), behind solution choke valve (14) reducing pressure by regulating flow, enter absorber (15) again, after cat head ammonia steam S15 enters condenser (10) and is condensed into liquefied ammonia S16, enter subcooler (11), after the low temperature ammonia steam S19 heat exchange that comes flash-pot (13), formation has the liquefied ammonia S17 of certain degree of supercooling, and S17 becomes low pressure liquefied ammonia S18 through choke valve (12) reducing pressure by regulating flow and enters evaporimeter (13) sweat cooling again.Become the ammonia steam S20 with certain degree of superheat behind the low temperature ammonia steam S19 process subcooler (11), enter at last absorber (15), absorbed by weak solution, again form concentrated solution S1 and enter next circulation.
Adopt Aspen Plus software that the above embodiment is carried out analog computation, being chosen for of each physical property equation: the ammoniacal liquor system adopts the RK-SOAVE equation, and the thermal source hot-air adopts the PENG-ROB equation, and the water and steam system adopts the STEAM-TA equation.It is as shown in table 1 to simulate choosing of required basic parameter, and table 1 is the embodiment basic parameter that circulates.
Table 1
Suppose that system is in steady-state operation, the thermal performance of logistics analog computation result, co-generation system and minute product system relatively sees Table 2 to table 3 during balance condition.Table 2 is embodiment cyclic balance work condition state parameters, and table 3 is that co-generation system embodiment compares with the thermal performance that divides the product system.
Table 2
Table 3
As can be seen from Table 3, the embodiment of the invention co-generation system thermal efficiency is 39.3%, and score is produced system thermal efficiency and improved 53.3%; Under the condition of producing identical cold energy and electricity, embodiment co-generation system fractional energy savings is 34.8%.The basic reason that system of the present invention thermodynamic property improves is:
1, co-generation system utilizes the waste heat driven refrigeration circulation of power generation cycle, and middle low-temperature heat source then in the kind of refrigeration cycle utilization, has been realized " temperature counterpart, the cascade utilization " of heat first in the power generation cycle utilization.
2, inner waste heat is that the heat of tower reactor weak solution is fully utilized, and has reduced the external heat dissipation capacity of system.
3, the rectifying column irreversible loss decrease of co-generation system.Traditional tower bottom of rectifying tower weak solution and the heat transfer temperature difference of heat source medium are too large, cause
Decrease large; And in the co-generation system, adopt the turbine steam discharge on power road to enter rectifying column, and be mixing heat-exchange, reduced heat transfer temperature difference.
4, the flue gas loss of co-generation system significantly reduces.The exhaust gas temperature of power generation cycle and kind of refrigeration cycle is all higher in minute product system, smoke evacuation
Decrease also larger; And in the co-generation system, generating working medium and refrigeration working medium are heated in successively heat release in the solution heat exchanger on the steam generator of Power Generation Road and the road of freezing of flue gas successively, have significantly reduced exhaust gas temperature, have reduced flue gas loss.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. the circulation system of a mixed working fluid power and refrigeration cogeneration, it is characterized in that, this system comprises separator (1), high-pressure solution pump (2), hypotonic solution pump (3), high-pressure solution heat exchanger (4), hypotonic solution heat exchanger (5), steam generator (6), waste heat solution heat exchanger (7), turbine (8), rectifying column (9), condenser (10), subcooler (11), ammonia choke valve (12), evaporimeter (13), solution choke valve (14) and absorber (15), wherein absorber (15) is connected with separator (1), separator (1) is connected to high-pressure solution pump (2) and hypotonic solution pump (3), high-pressure solution pump (2) connects the high-pressure solution heat exchanger (4) on power road, is steam generator (6) and turbine (8) afterwards; Hypotonic solution pump (3) connects hypotonic solution heat exchanger (5) and the waste heat solution heat exchanger (7) on the road of freezing successively; Turbine (8) directly links to each other with rectifying column (9) respectively with waste heat solution heat exchanger (7), the top of rectifying column (9) connects condenser (10), subcooler (11), ammonia choke valve (12) and evaporimeter (13) successively, and the bottom of rectifying column (9) connects high-pressure solution heat exchanger (4), hypotonic solution heat exchanger (5), solution choke valve (14) and absorber (15) successively.
2. the circulation system of mixed working fluid power and refrigeration cogeneration according to claim 1, it is characterized in that, described separator (1) is part flow arrangement, the quality shunting is carried out in the working medium logistics, its entrance is connected with the hot side outlet of absorber (15), and outlet is connected 3 with high-pressure solution pump (2) with the hypotonic solution pump respectively) be connected.
3. the circulation system of mixed working fluid power and refrigeration cogeneration according to claim 1 is characterized in that, described high-pressure solution pump (2) and hypotonic solution pump (3) are liquid pressing equipment, is used for improving fluid pressure; High-pressure solution pump (2) is connected between separator (1) and the high-pressure solution heat exchanger (4), and hypotonic solution pump (3) is connected between separator (1) and the hypotonic solution heat exchanger (5).
4. the circulation system of mixed working fluid power and refrigeration cogeneration according to claim 1, it is characterized in that, described high-pressure solution heat exchanger (4), hypotonic solution heat exchanger (5), steam generator (6) and waste heat solution heater (7) are heat transmission equipments, for the exchange heat that realizes between hot and cold logistics; Wherein:
The hot side of high-pressure solution heat exchanger (4) is imported and exported and is connected 5 with rectifying column (9) taphole with the hypotonic solution heater respectively) hot side entrance is connected, the cold side import and export are connected 6 with high-pressure solution pump (2) with steam generator respectively) the cold side entrance is connected; The hot side outlet of hypotonic solution heat exchanger (5) is connected with absorber (15) solution inlet port, and cold side is imported and exported and to be connected 7 with hypotonic solution pump (3) with the waste heat solution heat exchanger respectively) the cold side import is connected; The hot side outlet of steam generator (6) is connected with the hot side-entrance of waste heat solution heat exchanger (7), and the cold side outlet is connected with turbine (8) entrance; The outlet of waste heat solution heat exchanger (7) cold side connects rectifying column (9), and the heat of steam generator (6) input is industrial exhaust heat or solar energy.
5. the circulation system of mixed working fluid power and refrigeration cogeneration according to claim 1, it is characterized in that, described turbine (8) is an acting device, the HTHP ammonia vapor expands therein and realizes externally acting, turbine (8) is imported and exported respectively and is connected 9 with the outlet of steam generator (6) cold side with rectifying column) be connected, turbine (8) steam discharge directly enters rectifying column (9).
6. the circulation system of mixed working fluid power and refrigeration cogeneration according to claim 1, it is characterized in that, described rectifying column (9) is used for that ammonia and water are carried out rectifying and separates, its top is connected with a condenser (10), and the dense ammonia steam-condensation that condenser (10) is used for the rectifying separation is obtained is as refrigeration working medium; Rectifying institute calorific requirement is from turbine (8) exhausted spare heat, and the dilute ammonia solution of output enters high-pressure solution heat exchanger (4) at the bottom of the tower.
7. the circulation system of mixed working fluid power and refrigeration cogeneration according to claim 1, it is characterized in that, described subcooler (11) is heat transmission equipment, hot side is imported and exported and is connected respectively condenser (10) and ammonia choke valve (12), and cold side is imported and exported and connected respectively evaporimeter (13) and absorber (15); Ammoniacal liquor from condenser (10) cools off in this cryogenic refrigeration working medium by evaporimeter (13) outlet.
8. the circulation system of mixed working fluid power and refrigeration cogeneration according to claim 1, it is characterized in that, described ammonia choke valve (12) is the expansion dropping equipment, and ammoniacal liquor is realized step-down, cooling by throttling, and its import and export are connected 13 with subcooler (11) with evaporimeter respectively) be connected.
9. the circulation system of mixed working fluid power and refrigeration cogeneration according to claim 1, it is characterized in that, described evaporimeter (13) is realized cold output for evaporation that refrigeration working medium is absorbed heat therein, and its import and export are connected 11 with ammonia choke valve (12) with subcooler respectively) be connected.
10. the circulation system of mixed working fluid power and refrigeration cogeneration according to claim 1, it is characterized in that, described absorber (15) is made of blender and condenser, and the logistics of variable concentrations working medium mixes in blender first, and then total condensation is liquid in condenser; The hot side of absorber (15) comprises that cold side is cooling water from the ammonia steam of subcooler (11) with from the weak solution of solution choke valve (14).
11. the circulation system of mixed working fluid power and refrigeration cogeneration according to claim 1 is characterized in that, described solution choke valve (14) connects hypotonic solution heat exchanger (5) and absorber (15).
12. the circulation system of mixed working fluid power and refrigeration cogeneration according to claim 1, it is characterized in that, this system has acting circulation and a kind of refrigeration cycle, the acting circulation is take ammonia water mixture as working medium, to send into the acting of expanding in the turbine (8) at the hyperthermia and superheating ammonia vapor that steam generator (6) generates, rectifying column (9) and absorber (15) also are the composite devices of these two circulations for the tie point of acting circulation and kind of refrigeration cycle simultaneously.
13. the thermal circulation method of a mixed working fluid power and refrigeration cogeneration is applied to system claimed in claim 1, it is characterized in that, the method becomes superheated steam with the ammonia-water mixture thermal conversion, enters turbine acting generating; The turbine steam discharge enters rectifying column, obtain dense ammonia steam and weak aqua ammonia, realize cold output and generate the dense ammonia steam with certain degree of superheat wherein that weak aqua ammonia pressurizes rear and this dense ammonia vapor mixing with certain degree of superheat is condensed into ammonia-water mixture behind the dense ammonia steam-condensation as refrigeration working medium.
14. the thermal circulation method of mixed working fluid power and refrigeration cogeneration according to claim 13 is characterized in that, the method specifically comprises:
Absorber (15) concentrated solution S1 out first is split into two gangs of S2 and S7 through separator (1), S2 precession power road wherein, the cold road of S7 system, S2 is advanced high-pressure solution heat exchanger (4) after high-pressure solution pump (2) pressurization, with the weak solution S11 heat exchange from rectifying column (9), then enter steam generator (6) evaporation and enter turbine (8) acting of expanding after overheated, turbine (8) not condensation of steam discharge directly enters rectifying column (9); Another burst concentrated solution S7 passes through hypotonic solution heat exchanger (5) and waste heat solution heat exchanger (7) heating successively after hypotonic solution pump (3) pressurization, enter at last rectifying column (9); In rectifying column (9), from the steam discharge S6 of turbine (8) and the mixed heat transfer that directly carries out contact from the concentrated solution S7 of waste heat solution heat exchanger (7), in tower, be separated into tower reactor weak solution S11 and cat head ammonia steam S15; Tower reactor weak solution S11 successively flow through high-pressure solution heat exchanger (4) and hypotonic solution heat exchanger (5), behind solution choke valve (14) reducing pressure by regulating flow, enter absorber (15) again, after cat head ammonia steam S15 enters condenser (10) and is condensed into liquefied ammonia S16, enter subcooler (11), after the low temperature ammonia steam S19 heat exchange that comes flash-pot (13), formation has the liquefied ammonia S17 of certain degree of supercooling, and S17 becomes low pressure liquefied ammonia S18 through ammonia choke valve (12) reducing pressure by regulating flow and enters evaporimeter (13) sweat cooling again; Become the ammonia steam S20 with certain degree of superheat behind the low temperature ammonia steam S19 process subcooler (11), enter at last absorber (15), absorbed by weak solution, again form concentrated solution S1 and enter next circulation.
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