CN103807946A - Distillation regeneration device of heat source tower antifreeze solution - Google Patents
Distillation regeneration device of heat source tower antifreeze solution Download PDFInfo
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- CN103807946A CN103807946A CN201410037502.1A CN201410037502A CN103807946A CN 103807946 A CN103807946 A CN 103807946A CN 201410037502 A CN201410037502 A CN 201410037502A CN 103807946 A CN103807946 A CN 103807946A
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- 230000008929 regeneration Effects 0.000 title claims abstract description 46
- 238000011069 regeneration method Methods 0.000 title claims abstract description 46
- 230000002528 anti-freeze Effects 0.000 title abstract 5
- 238000004821 distillation Methods 0.000 title abstract 3
- 239000000243 solution Substances 0.000 claims description 246
- 238000007710 freezing Methods 0.000 claims description 101
- 239000012530 fluid Substances 0.000 claims description 89
- 239000007788 liquid Substances 0.000 claims description 86
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 49
- 230000035699 permeability Effects 0.000 claims description 41
- 238000009835 boiling Methods 0.000 claims description 37
- 238000001816 cooling Methods 0.000 claims description 33
- 230000001172 regenerating effect Effects 0.000 claims description 24
- 239000007864 aqueous solution Substances 0.000 claims description 21
- 230000008676 import Effects 0.000 claims description 21
- 238000009833 condensation Methods 0.000 claims description 12
- 230000005494 condensation Effects 0.000 claims description 12
- 238000009292 forward osmosis Methods 0.000 abstract 1
- 239000012498 ultrapure water Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 230000006872 improvement Effects 0.000 description 7
- 238000000926 separation method Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000008595 infiltration Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000003204 osmotic effect Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- OVARTBFNCCXQKS-UHFFFAOYSA-N propan-2-one;hydrate Chemical compound O.CC(C)=O OVARTBFNCCXQKS-UHFFFAOYSA-N 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000011555 saturated liquid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The invention discloses a distillation regeneration device of a heat source tower antifreeze solution. The distillation regeneration device of the heat source tower antifreeze solution comprises a work subsystem and a regeneration subsystem. The work subsystem comprises a circulation loop formed by a heat source tower heat pump system and a second adjustment valve (9). The regeneration subsystem comprises an antifreeze solution circulation system and a draw solution circulation system. The antifreeze solution circulation system is coupled with the draw solution circulation system through a forward osmosis device (8).
Description
Technical field
The present invention relates to air conditioner refrigerating field, specifically a kind of rectifying regenerating unit of heat source tower anti-freezing solution.
Background technology
In order to tackle the problem of winter air source heat pump frosting, there are at present two class solution routes, the one, take various defrost measures for its frosting problem; Another kind of approach is to utilize the heat source tower heat pump system that starts in recent years to come into one's own gradually to replace air source heat pump system, has retained again heat pump Winter-summer dual purpose, feature that efficiency is higher in having avoided frosting problem.Heat source tower heat pump system is carried out caloic exchange by anti-freezing solution and air, absorbs airborne sensible heat and latent heat for evaporimeter provides thermal source, make the operating mode of system below 0 ℃ still can be efficiently, stable operation.Heat source tower heat pump system has very large application potential on energy-conservation market, the application and research of both at home and abroad heat source tower heat pump system being carried out is at present also little, from ruuning situation, a subject matter urgently to be resolved hurrily is how the anti-freezing solution after moisture absorption to be regenerated, the regeneration that can adopt is divided into two classes, i.e. heating power regeneration and merit drive regeneration.Heating power regeneration comprises the regeneration of non-boiling formula and boiling type regeneration, the former has advantages of low-grade energy utilization, but exist, mass transfer potential difference is large, the thermal efficiency is low and move complicated shortcoming, has certain difficulty (if application number is 201010567051.4 and 200910098008.5 patent) in actual extension process; The latter makes the moisture explosive evaporation in solution separate in vacuum environment, it is good that caloic is transmitted performance, require lower to the temperature levels of low-grade heat source, have larger energy-saving potential, system is simple, but anti-freezing solution in open circulation with fixed gas more, greatly affect vacuum boiling effect, therefore need vavuum pump constantly to find time the vacuum that keeps certain, thereby produce larger electrical energy demands, the system effectiveness that makes boiling type regeneration greatly reduces and loses feasibility.Merit drives regeneration reverse osmosis unit to change the chemical potential of moisture in concentrated solution by adding external pressure, and make it to realize moisture separation to weak solution infiltration, application number is that first 200910307940.4 patent has proposed a kind of single-stage regeneration system, but solution anti-icing fluid heating problems not yet in effect, operating pressure is larger, and do not consider that pressure energy reclaims, application number is 201320019403.1 patent employing twin-stage infiltration reduction operating pressure, and introduce pressure energy recover and source pump recooler optimization system structure, further improve the efficiency of system, but adding of recuperator increased system initial cost, Technical Economy reduces.
In sum, in the technical measures of many heat source tower anti-icing fluid regeneration, boiling type regeneration is fairly simple and efficient a kind of regeneration, it can effectively utilize low-grade heat source, without adding high pressure, does not also need recuperator, but boiling type regeneration is all using moisture as low boiling component conventionally, utilize heat absorption evaporation to separate from solution, bring thus two aspect problems: the one, anti-freezing solution concentration is compared with low and make required heat source temperature less, and different transfer of heat loss proportion is larger; The 2nd, the latent heat of vaporization of water is larger, needs to consume more heat transfer in separation process.For the problems referred to above, a solution is to carry out multiple-effect regeneration, but this can cause the complicated of system, and technical and economic performance reduces, and needs to invent a kind of anti-freezing solution regenerating unit that can address the above problem and keep single-action regeneration simplicity for this reason.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of rectifying regenerating unit of heat source tower anti-freezing solution simple in structure.
In order to solve the problems of the technologies described above, the invention provides a kind of rectifying regenerating unit of heat source tower anti-freezing solution, comprise working subsystem and regeneration subsystem; Described working subsystem comprises the closed circuit that heat source tower heat pump system and the second control valve form; Described regeneration subsystem comprises the anti-icing fluid circulatory system and draws fluid circulation; The described anti-icing fluid circulatory system and drawing between fluid circulation intercouples by positive permeability apparatus.
Improvement as the rectifying regenerating unit of heat source tower anti-freezing solution of the present invention: the described anti-icing fluid circulatory system comprises the first control valve, anti-icing fluid booster pump, filter, the first solution heat exchanger, the second solution heat exchanger and heater; Low-temperature liquid pipe, the low-temperature liquid pipe of the second solution heat exchanger and the water back of heater of the taphole of described heat source tower heat pump system, the first control valve, anti-icing fluid booster pump, filter, the first solution heat exchanger interconnect successively; The water back of described heater also interconnects with positive permeability apparatus anti-icing fluid entrance; The anti-icing fluid outlet of described positive permeability apparatus is by being connected with the closed circuit that the second control valve forms with heat source tower heat pump system after the high-temp liquid pipeline of the first solution heat exchanger; The described fluid circulation that draws comprises the 3rd control valve, the 3rd solution heat exchanger, rectifier, condenser, tower top booster pump, draws solution booster pump and condensate pump; The liquid that draws of described positive permeability apparatus exports on the one hand by interconnecting with the liquid entrance that draws of rectifier after the low-temperature liquid pipe of the 3rd control valve and the 3rd solution heat exchanger; The overhead vapours outlet of rectifier successively condensation pipe, the tower top booster pump by condenser and draw solution booster pump after be connected with the liquid import of drawing of permeability apparatus just; At the bottom of the tower of rectifier, delivery port is connected with condensate pump, the high-temp liquid pipeline of the 3rd solution heat exchanger and the high-temp liquid pipeline of the second solution heat exchanger successively; The liquid outlet of drawing of described positive permeability apparatus is connected with the liquid import of drawing of positive permeability apparatus in addition on the one hand after drawing solution booster pump.
Further improvement as the rectifying regenerating unit of heat source tower anti-freezing solution of the present invention: in the time that heat source tower heat pump system is open type, cooling pipe one end of described condenser is connected with the closed circuit that the second control valve forms with heat source tower heat pump system; Other one end of described condenser cooling pipe is connected with the taphole of heat source tower heat pump system by the 4th control valve; Tower top cooling pipe one end in described rectifier is connected with the closed circuit that the second control valve forms with heat source tower heat pump system; Other one end of tower top cooling pipe in described rectifier is connected with the taphole of heat source tower heat pump system by the 4th control valve.
Further improvement as the rectifying regenerating unit of heat source tower anti-freezing solution of the present invention: in the time that heat source tower heat pump system is enclosed, one end of described condenser cooling pipe is connected with the circulation solution outlet of heat source tower heat pump system by the 4th control valve; Other one end of cooling pipe of described condenser is connected with the circulation solution import of heat source tower heat pump system; One end of tower top cooling pipe in described rectifier is connected with the circulation solution outlet of heat source tower heat pump system by the 4th control valve; Other one end of tower top cooling pipe in described rectifier is connected with the circulation solution import of heat source tower heat pump system.
Further improvement as the rectifying regenerating unit of heat source tower anti-freezing solution of the present invention: the anti-freezing solution using in described working subsystem and the anti-icing fluid circulatory system is organic aqueous solution or aqueous solution of inorganic matter; Water in described organic aqueous solution or aqueous solution of inorganic matter is low boiling component; The described solution that draws using in fluid circulation that draws is selected the organic aqueous solution dissolving each other completely with water; Water in the organic aqueous solution that described and water dissolves each other is completely high boiling component.
Further improvement as the rectifying regenerating unit of heat source tower anti-freezing solution of the present invention: anti-icing fluid entrance and anti-icing fluid outlet and draw liquid entrance and draw between liquid outlet and isolate by pellicle in described positive permeability apparatus; Described pellicle optionally passes through moisture, and anti-freezing solution and all the other components of drawing in solution are had to very high crown_interception.
Further improvement as the rectifying regenerating unit of heat source tower anti-freezing solution of the present invention: described heat source tower heat pump system is mainly made up of heat source tower, heat pump two parts.
Further improvement as the rectifying regenerating unit of heat source tower anti-freezing solution of the present invention: boil water back and the external thermal source of described rectifier bottom are interconnected again.
The present invention is compared with existing heat source tower anti-freezing solution boiling regenerative system, and the present invention has the following advantages:
1) in the time that low-grade heat source temperature is higher (40 ℃～55 ℃), only need to adopt single-action regeneration just can keep the efficient utilization to thermal source, have simplified revived structure.The present invention adopts positive infiltration technology, and its main feature is that to draw water in solution be high boiling component, utilizes to draw solution and absorb the moisture in anti-freezing solution when work, then regenerates to drawing solution.Excessive moisture distillates at the bottom of rectifying column, rectifying tower bottom reboiler is suitable for the thermal source of 40 ℃～55 ℃, therefore avoid the multiple-effect regeneration flow process of taking for making full use of thermal source in common boiling type regenerative system, simplified revived structure, strengthened technical and economic performance.
2) separation unit moisture, institute's calorific requirement still less, has the higher thermal efficiency.To draw moisture in solution be high boiling component due to adopted, therefore separation process institute heat consumption is mainly used for drawing the heat absorption evaporation of low boiling component in solution, but low boiling component content in anti-freezing solution is lower, the evaporation latent heat consuming is less, has improved the thermal efficiency of system.
3) while regeneration, the circulating ratio of anti-freezing solution is low.The present invention adopts rectifying regeneration, what go out from rectifying column underflow is high-purity moisture, and what flow out from tower top is high-purity gaseous state thing, and the needed circulating ratio of separation unit water is mainly with to draw solution concentration relevant, it is worth generally 2 times of left and right, so be more conducive to system miniaturization.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is a kind of structural representation of the present invention (open type anti-icing fluid circulatory system 1a);
Fig. 2 is another structural representation of the present invention (enclosed anti-icing fluid circulatory system 1a).
The specific embodiment
Fig. 1～Fig. 2 has provided a kind of rectifying regenerating unit of heat source tower anti-freezing solution.
Comprise working subsystem and regeneration subsystem; Working subsystem comprises the closed circuit that heat source tower heat pump system and the second control valve 9 form.Regeneration subsystem comprises the anti-icing fluid circulatory system and draws fluid circulation; The anti-icing fluid circulatory system and drawing between fluid circulation intercouples by positive permeability apparatus 8.In working subsystem, use anti-freezing solution, in the process of circulation, constantly absorb after airborne steam, concentration constantly reduces; Once and concentration too low after, just start the anti-icing fluid circulatory system and draw fluid circulation, the anti-freezing solution of low concentration, by the anti-icing fluid circulatory system with after drawing fluid circulation and being used in conjunction with, recovers the concentration of anti-freezing solution.
The anti-freezing solution using in working subsystem and the anti-icing fluid circulatory system is organic aqueous solution or aqueous solution of inorganic matter; Water in organic aqueous solution or aqueous solution of inorganic matter is low boiling component; Draw the solution that draws using in fluid circulation and select the organic aqueous solution dissolving each other completely with water; Water in the organic aqueous solution dissolving each other completely with water is high boiling component.
Anti-freezing solution can be selected organic aqueous solution (as ethylene glycol solution) or aqueous solution of inorganic matter (as calcium chloride solution), and wherein water is low boiling component.Draw solution and select the organic aqueous solution (as acetone-water solution) dissolving each other completely with water, wherein water is high boiling component.The positive interior anti-icing fluid entrance of permeability apparatus 8 and anti-icing fluid export and draw liquid entrance and draw between liquid outlet and isolate by pellicle; Pellicle optionally passes through moisture, and anti-freezing solution and all the other components of drawing in solution are had to very high crown_interception.Heat source tower heat pump system is mainly made up of heat source tower, heat pump two parts.The built-in backflow cooling pipe of rectifier tower top, the built-in water back that boils again at the bottom of tower.The thermal source of heater 7 and rectifier 12 should adopt low-grade heat source within the scope of 40 ℃～55 ℃, as solar energy, waste heat source or heat pump self supplying heat source.
Embodiment 1, the following stated are the specific structural features of open type anti-icing fluid circulatory system 1a.
Working subsystem comprises the closed circuit that open type anti-icing fluid circulatory system 1a and the second control valve 9 form.
The anti-icing fluid circulatory system comprises the first control valve 2, anti-icing fluid booster pump 3, filter 4, the first solution heat exchanger 5, the second solution heat exchanger 6 and heater 7; The taphole of open type anti-icing fluid circulatory system 1a is connected with anti-icing fluid booster pump 3 by the first control valve 2, anti-icing fluid booster pump 3 is connected with low-temperature liquid pipe one end of the first solution heat exchanger 5 by filter 4, other one end of low-temperature liquid pipe of the first solution heat exchanger 5 is connected with one end of the low-temperature liquid pipe of the second solution heat exchanger 6, other one end of the low-temperature liquid pipe of the second solution heat exchanger 6 is connected with one end of heater 7 water backs, and other one end of heater 7 water backs interconnects with positive permeability apparatus 8 anti-icing fluid entrances; The anti-icing fluid outlet of positive permeability apparatus 8 is connected with high-temp liquid pipeline one end of the first solution heat exchanger 5, and other one end of high-temp liquid pipeline of the first solution heat exchanger 5 is connected with the closed circuit that heat source tower heat pump system and the second control valve 9 form.
Drawing fluid circulation comprises the 3rd control valve 10, the 3rd solution heat exchanger 11, rectifier 12, condenser 13, tower top booster pump 14, draws solution booster pump 15 and condensate pump 16; The liquid outlet of drawing of positive permeability apparatus 8 is divided into two-way: lead up to after the low-temperature liquid pipe of the 3rd control valve 10 and the 3rd solution heat exchanger 11 and interconnect with the liquid entrance that draws of rectifier 12; An other road is connected with the outlet of tower top booster pump 14.The overhead vapours outlet of rectifier 12 successively by the condensation pipe of condenser 13 with after tower top booster pump 14 with positive permeability apparatus 8 draw taphole be connected (described above, an other road is connected with the outlet of tower top booster pump 14); At the bottom of the tower of rectifier 12, delivery port, successively by setting out the mouth of a river after the high-temp liquid pipeline of condensate pump 16, the 3rd solution heat exchanger 11 and the high-temp liquid pipeline of the second solution heat exchanger 6, is discharged the water outlet of rectifier 12 by delivery port.The outlet of tower top booster pump 14 is connected with the liquid import of drawing of positive permeability apparatus 8 by drawing solution booster pump 15.
Cooling pipe one end of condenser 13 is connected with the closed circuit that the second control valve 9 forms with heat source tower heat pump system; Other one end of condenser 13 cooling pipes is connected with the taphole of open type anti-icing fluid circulatory system 1a by the 4th control valve 17; Tower top cooling pipe one end in rectifier 12 is connected with the closed circuit that the second control valve 9 forms with open type anti-icing fluid circulatory system 1a; Other one end of tower top cooling pipe in rectifier 12 is connected with the taphole of open type anti-icing fluid circulatory system 1a by the 4th control valve 17.
When concrete use, step is as follows:
1, the anti-freezing solution concentration flowing out when the anti-freezing solution outlet of open type anti-icing fluid circulatory system 1a is between capping and lower limit time, system is in mode of operation, the second control valve 9 is opened, the first control valve 2 and the 4th control valve 17 are closed completely, be working subsystem operation, regeneration subsystem is closed.The anti-freezing solution import that now anti-freezing solution flows back to again open type anti-icing fluid circulatory system 1a from anti-freezing solution outlet is flowed out again by the second control valve 9, carries out caloic exchange with air.Through constantly circulation repeatedly, the anti-freezing solution concentration that anti-freezing solution outlet is flowed out will be constantly thinning.
2, the anti-freezing solution concentration flowing out when the anti-freezing solution outlet of open type anti-icing fluid circulatory system 1a is prescribed a time limit lower than under setting, and system is in work regeneration mode, and the first control valve 2 and the 4th control valve 17 are opened, and working subsystem and regeneration subsystem are all opened simultaneously.
2.1 anti-freezing solutions that now flow out from the anti-freezing solution outlet of open type anti-icing fluid circulatory system 1a are divided into three tunnels:
2.1.1 the first via:
Directly pass through the second control valve 9 by bypass;
2.1.2 the second tunnel:
By the first control valve 2, pressurizeed by anti-freezing solution booster pump 3, then after filtering, filter 4 reaches the import water quality that positive permeability apparatus 8 requires, enter again the low-temperature liquid pipe of the first solution heat exchanger 5, absorb after the heat that in high-temp liquid pipeline, anti-freezing solution discharges, temperature raises, enter again the low-temperature liquid pipe of the second solution heat exchanger 6, absorb after the heat that in high-temp liquid pipeline, water discharges, temperature further raises, enter again the water back of heater 7, absorb after the heat that outside low-grade heat source provides, temperature is further elevated to 0 ℃ above (as 5 ℃), flow into positive permeability apparatus 8 by anti-freezing solution import again, under the effect of solution osmotic pressure, moisture in anti-freezing solution enters the solution that draws of opposite side by pellicle, it is large that the concentration of anti-freezing solution becomes, flow out from anti-freezing solution outlet again, after the high-temp liquid pipeline of the first solution heat exchanger 5, enter in the closed circuit that open type anti-icing fluid circulatory system 1a and the second control valve 9 form, mutually mix with the anti-freezing solution in this closed circuit,
2.1.3 Third Road:
Again be divided into two-way through the 4th control valve 17:
The first via enters that after the tower top cooling pipe of rectifier 12, (a part of overhead vapours is condensed into after liquid backflow, and temperature raises; Step 2.5), the anti-freezing solution in the closed circuit forming with open type anti-icing fluid circulatory system 1a and the second control valve 9 mixes;
The second tunnel enters after the cooling pipe of condenser 13 (after the condensation latent heat that in absorption condensation pipeline, low boiling steam discharges, temperature raises, and then the anti-freezing solution flowing out with the tower top cooling pipe from rectifier 12 mixes, anti-freezing solution in the last closed circuit forming with open type anti-icing fluid circulatory system 1a and the second control valve 9 again mixes mutually, as step 2.6); Anti-freezing solution stream in the closed circuit forming with open type anti-icing fluid circulatory system 1a and the second control valve 9 mixes;
Anti-freezing solution in the closed circuit that 2.2 open type anti-icing fluid circulatory system 1a and the second control valve 9 form flows into open type anti-icing fluid circulatory system 1a, carries out caloic exchange with air.
2.3 draw solution dense and enter positive permeability apparatus 8 from the solution inlet port of drawing of positive permeability apparatus 8, under the effect of solution osmotic pressure, absorb the moisture in anti-freezing solution, concentration diminishes, and becomes rare solution that draws, then flows out from drawing taphole.
2.4 are divided into two-way from the rare solution that draws that draws taphole outflow of positive permeability apparatus 8:
The first via:
Be depressured to the operating pressure of rectifier 12 through the 3rd control valve 10, (absorb the heat that high-temp liquid ducted high-purity water discharges, temperature is elevated to saturated liquid temperature then to enter the low-temperature liquid pipe of the 3rd solution heat exchanger 11; Step 2.8) after enter rectifier 12 from drawing solution inlet port;
The second tunnel:
Mix with the high-purity low-boiling point liquid flowing out by tower top booster pump 14, concentration raises, and again becomes the dense solution that draws.
2.5, rare solution that draws enters after rectifier 12, exchanges by caloic, and at the bottom of high-purity water collects in tower, high-purity low boiling steam collects in tower top.
Part tower top low boiling steam is given thermal release after the anti-freezing solution in the cold pipeline that is built in tower top, becomes overhead reflux liquid.
External heat source enters the water back that boils again at the bottom of rectifier 12 towers, and high-purity water at the bottom of a part of tower is heated to be to backflow steam at the bottom of tower.
Finally, high-purity low boiling steam flows out from overhead vapours outlet, and high-purity water flows out from delivery port at the bottom of tower.
The high-purity low boiling steam that 2.6 steam (vapor) outlets from rectifier 12 flow out flows into the condensation pipe of condenser 13, by thermal release to the anti-freezing solution in cooling pipe after, temperature reduces to become mutually becomes high-purity low-boiling point liquid, is then pressurized to normal pressure (the second road anti-freezing solution in step 2.1.3) by tower top booster pump 14;
2.7 are drawn after solution is drawn solution booster pump 15 and pressurizes and are entered positive permeability apparatus 8 from drawing solution inlet port again by tower top booster pump 14 dense, are recycled to step 2.3.
The high-purity water that 2.8 delivery ports from rectifier 12 the flow out water pump 16 that is condensed is pressurized to normal pressure successively by discharging after the high-temp liquid pipeline of the 3rd solution heat exchanger 11 and the high-temp liquid pipeline of the second solution heat exchanger 6;
Now, by the high-temp liquid pipeline of the 3rd solution heat exchanger 11 and the high-temp liquid pipeline of the second solution heat exchanger 6, give the anti-freezing solution (first via of step 2.4) in corresponding low-temperature liquid pipe by thermal release.
2.9 under work regeneration mode, and the water yield of discharging from regeneration subsystem is greater than the water yield that open type anti-icing fluid circulatory system 1a absorbs from air, and through continuous iterative cycles, solution concentration will constantly thicken.
3, in the time that the anti-freezing solution of open type anti-icing fluid circulatory system 1a exports the anti-freezing solution concentration flowing out higher than capping, system comes back to mode of operation, working subsystem operation, and regeneration subsystem is closed.
Working subsystem comprises the closed circuit that enclosed anti-icing fluid circulatory system 1b and the second control valve 9 form.
The anti-icing fluid circulatory system comprises the first control valve 2, anti-icing fluid booster pump 3, filter 4, the first solution heat exchanger 5, the second solution heat exchanger 6 and heater 7; The taphole of enclosed anti-icing fluid circulatory system 1b is connected with anti-icing fluid booster pump 3 by the first control valve 2, anti-icing fluid booster pump 3 is connected with low-temperature liquid pipe one end of the first solution heat exchanger 5 by filter 4, other one end of low-temperature liquid pipe of the first solution heat exchanger 5 is connected with one end of the low-temperature liquid pipe of the second solution heat exchanger 6, other one end of the low-temperature liquid pipe of the second solution heat exchanger 6 is connected with one end of heater 7 water backs, and other one end of heater 7 water backs interconnects with positive permeability apparatus 8 anti-icing fluid entrances; The anti-icing fluid outlet of positive permeability apparatus 8 is connected with high-temp liquid pipeline one end of the first solution heat exchanger 5, and other one end of high-temp liquid pipeline of the first solution heat exchanger 5 is connected with the closed circuit that heat source tower heat pump system and the second control valve 9 form.
Drawing fluid circulation comprises the 3rd control valve 10, the 3rd solution heat exchanger 11, rectifier 12, condenser 13, tower top booster pump 14, draws solution booster pump 15 and condensate pump 16; The liquid outlet of drawing of positive permeability apparatus 8 is divided into two-way: lead up to after the low-temperature liquid pipe of the 3rd control valve 10 and the 3rd solution heat exchanger 11 and interconnect with the liquid entrance that draws of rectifier 12; An other road is connected with the outlet of tower top booster pump 14.The overhead vapours outlet of rectifier 12 is connected by condensation pipe, tower top booster pump 14 and the taphole that draws of positive permeability apparatus 8 of condenser 13 successively; At the bottom of the tower of rectifier 12, delivery port, successively by setting out the mouth of a river after the high-temp liquid pipeline of condensate pump 16, the 3rd solution heat exchanger 11 and the high-temp liquid pipeline of the second solution heat exchanger 6, is discharged the water outlet of rectifier 12 by delivery port.The outlet of tower top booster pump 14 is connected with the liquid import of drawing of positive permeability apparatus 8 by drawing solution booster pump 15.
One end of condenser 13 cooling pipes is connected with the circulation solution outlet of heat source tower heat pump system by the 4th control valve 17; Other one end of cooling pipe of condenser 13 is connected with the circulation solution import of heat source tower heat pump system; One end of tower top cooling pipe in rectifier 12 is connected with the circulation solution outlet of heat source tower heat pump system by the 4th control valve 17; Other one end of tower top cooling pipe in rectifier 12 is connected with the circulation solution import of heat source tower heat pump system.
When concrete use, step is as follows:
1, the anti-freezing solution concentration flowing out when the anti-freezing solution outlet of enclosed anti-icing fluid circulatory system 1b is between capping and lower limit time, system is in mode of operation, the second control valve 9 is opened, the first control valve 2 and the 4th control valve 17 are closed completely, be working subsystem operation, regeneration subsystem is closed.The anti-freezing solution import that now anti-freezing solution flows back to again enclosed anti-icing fluid circulatory system 1b from anti-freezing solution outlet is flowed out again by the second control valve 9, carries out caloic exchange with air.Through constantly circulation repeatedly, the anti-freezing solution concentration that anti-freezing solution outlet is flowed out will be constantly thinning.
2, the anti-freezing solution concentration flowing out when the anti-freezing solution outlet of enclosed anti-icing fluid circulatory system 1b is prescribed a time limit lower than under setting, and system is in work regeneration mode, and the first control valve 2 and the 4th control valve 17 are opened, and working subsystem and regeneration subsystem are all opened simultaneously.
2.1 anti-freezing solutions that now flow out from the anti-freezing solution outlet of enclosed anti-icing fluid circulatory system 1b are divided into two-way:
2.1.1 the first via:
Directly pass through the second control valve 9 by bypass;
2.1.2 the second tunnel:
By the first control valve 2, pressurizeed by anti-freezing solution booster pump 3, then after filtering, filter 4 reaches the import water quality that positive permeability apparatus 8 requires, enter again the low-temperature liquid pipe of the first solution heat exchanger 5, absorb after the heat that in high-temp liquid pipeline, anti-freezing solution discharges, temperature raises, enter again the low-temperature liquid pipe (whether should be low-temperature liquid pipe) of the second solution heat exchanger 6, absorb after the heat that in high-temp liquid pipeline, water discharges, temperature further raises, enter again the water back of heater 7, absorb after the heat that outside low-grade heat source provides, temperature is further elevated to 0 ℃ above (as 5 ℃), flow into positive permeability apparatus 8 by anti-freezing solution import again, under the effect of solution osmotic pressure, moisture in anti-freezing solution enters the solution that draws of opposite side by pellicle, it is large that the concentration of anti-freezing solution becomes, flow out from anti-freezing solution outlet again, after the high-temp liquid pipeline of the first solution heat exchanger 5, enter in the closed circuit that enclosed anti-icing fluid circulatory system 1b and the second control valve 9 form, mutually mix with the anti-freezing solution in this closed circuit,
Anti-freezing solution in the closed circuit that 2.2 enclosed anti-icing fluid circulatory system 1b and the second control valve 9 form flows into enclosed anti-icing fluid circulatory system 1b, carries out caloic exchange with air.
2.3 draw solution dense and enter positive permeability apparatus 8 from the solution inlet port of drawing of positive permeability apparatus 8, under the effect of solution osmotic pressure, absorb the moisture in anti-freezing solution, concentration diminishes, and becomes rare solution that draws, then flows out from drawing taphole.
2.4 are divided into two-way from the rare solution that draws that draws taphole outflow of positive permeability apparatus 8:
The first via:
Be depressured to the operating pressure of rectifier 12 through the 3rd control valve 10, (absorb the heat that high-temp liquid ducted high-purity water discharges, temperature is elevated to saturated liquid temperature then to enter the low-temperature liquid pipe of the 3rd solution heat exchanger 11; Step 2.8) after enter rectifier 12 from drawing solution inlet port;
The second tunnel:
Mix with the high-purity low-boiling point liquid flowing out by tower top booster pump 14, concentration raises, and again becomes the dense solution that draws.
2.5, rare solution that draws enters after rectifier 12, exchanges by caloic, and at the bottom of high-purity water collects in tower, high-purity low boiling steam collects in tower top.
Part tower top low boiling steam is given thermal release after the circulation solution (first via circulation solution in step 2.1.3) in the cold pipeline that is built in tower top, becomes overhead reflux liquid.
External heat source enters the water back that boils again at the bottom of rectifier 12 towers, and high-purity water at the bottom of a part of tower is heated to be to backflow steam at the bottom of tower.
Finally, high-purity low boiling steam flows out from overhead vapours outlet, and high-purity water flows out from delivery port at the bottom of tower.
The high-purity low boiling steam that 2.6 steam (vapor) outlets from rectifier 12 flow out flows into the condensation pipe of condenser 13, by thermal release to the circulation solution in cooling pipe after, temperature reduces to become mutually becomes high-purity low-boiling point liquid, is then pressurized to normal pressure (the second road circulation solution in step 2.9) by tower top booster pump 14;
2.7 are drawn after solution is drawn solution booster pump 15 and pressurizes and are entered positive permeability apparatus 8 from drawing solution inlet port again by tower top booster pump 14 dense, are recycled to step 2.3.
The high-purity water that 2.8 delivery ports from rectifier 12 the flow out water pump 16 that is condensed is pressurized to normal pressure successively by discharging after the high-temp liquid pipeline of the 3rd solution heat exchanger 11 and the high-temp liquid pipeline of the second solution heat exchanger 6;
Now, give the anti-freezing solution (first via of step 2.4) in corresponding low-temperature liquid pipe by the high-temp liquid pipeline of the 3rd solution heat exchanger 11 and the high-temp liquid pipeline of the second solution heat exchanger 6 by thermal release.
2.9 outlets of the circulation solution from closed type heat source tower heat pump 1b are flowed out circulation solution and after the 4th control valve 17, are divided into two-way:
The first via enters that after the tower top cooling pipe of rectifier 12, (a part of overhead vapours is condensed into after liquid backflow, and temperature raises; Step 2.5), then return to the circulation solution import of closed type heat source tower heat pump 1b;
The second tunnel enters after the cooling pipe of condenser 13 (after the condensation latent heat that in absorption condensation pipeline, low boiling steam discharges, temperature raises, and then the circulation solution flowing out with the tower top cooling pipe from rectifier 12 mixes, as step 2.6); Finally return to the circulation solution import of enclosed anti-icing fluid circulatory system 1b;
2.10 under work regeneration mode, and the water yield of discharging from regeneration subsystem is greater than the water yield that enclosed anti-icing fluid circulatory system 1b absorbs from air, and through continuous iterative cycles, solution concentration will constantly thicken.
3, in the time that the anti-freezing solution of enclosed anti-icing fluid circulatory system 1b exports the anti-freezing solution concentration flowing out higher than capping, system comes back to mode of operation, working subsystem operation, and regeneration subsystem is closed.
The 1kg water vapour that the calculating parameter of embodiment 1 absorbs for heat source tower heat pump system in Table 1(from air), system is in work regeneration mode, design condition is: 5 ℃ of environment temperatures, just permeating temperature is 5 ℃, anti-freezing solution adopts calcium chloride solution, draw solution and adopt acetone-water solution, the freezing point of anti-freezing solution is-10 ℃～-12.5 ℃, heat source tower heat absorption latent heat ratio is 20%, dehydration multiplying power is 1.5, it is 18%～20% that anti-freezing solution is set mass concentration scope, the import/export mass concentration of drawing solution is 49.4%/39.4%, while just infiltration, can produce the permeable pressure head of 7Mpa.Generator heat transfer temperature difference is 5 ℃, and condensation temperature is-3 ℃.The anti-freezing solution overall average circulating ratio calculating is 633, the average circulating ratio that enters the anti-freezing solution of positive permeability apparatus is 5.06, rare solution circulation multiplying power of drawing is 5.71, rare solution circulation multiplying power of drawing of entering rectifier is 2.39, rectifier pressure is 7851pa, the required heat source temperature of rectifier is 46.3 ℃, rectifier condensation temperature is-3 ℃, rectifier heat consumption is 615.2kJ/kg, heater heat consumption is 8.7kJ/kg, anti-freezing solution booster pump wasted work 3.86kJ/kg, drawing solution booster pump wasted work is 3.27kJ/kg, tower top booster pump wasted work is 0.08kJ/kg, condensate pump wasted work is 0.14kJ/kg, the minimum dehydration of system theoretical power consumption is that 12.6kJ/kg(separates 1kg water required least work from a large amount of 18% anti-freezing solution), the showing tremendous enthusiasm use of actual consumption is 80.7kJ/kg, the electric energy consuming is 7.35kJ/kg, therefore total fire is 14.3% by effect, regenerated heat efficiency for 400%(regenerated heat definitions of efficiency be the ratio of evaporation 1kg water institute's calorific requirement and actual separation 1kg water institute calorific requirement).Compared with visible with conventional boiling regenerative system, the present invention utilizes single-action rectifying regeneration just to realize the effect of multiple-effect evaporation regeneration, simplify system architecture, the required heat of moisture of separation unit quality is only equivalent to 1/4 of conventional single-action boiling regeneration institute calorific requirement, anti-freezing solution and rare circulating ratio of drawing solution of entering rectifier are less in addition, have reduced to add heat.
As can be seen here, compared with prior art, regenerated heat efficiency is high in the present invention, and system is simple, has better Technological Economy and is worth, and has effectively realized original intention of the present invention.
In above embodiment, can consider the rationally design parameter of definite system of the factors such as concrete service condition and requirement, technical and economic performance, to take into account applicability and the economy of system.
The heating power result of calculation (for 1kg condensator outlet liquid working substance R134a) of table 1 embodiment 1
Finally, it is also to be noted that, what more than enumerate is only several specific embodiments of the present invention.Obviously, the invention is not restricted to above embodiment, can also have many distortion.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention, all should think protection scope of the present invention.
Claims (8)
1. the rectifying regenerating unit of heat source tower anti-freezing solution, comprises working subsystem and regeneration subsystem; Described working subsystem comprises the closed circuit that heat source tower heat pump system and the second control valve (9) form; It is characterized in that: described regeneration subsystem comprises the anti-icing fluid circulatory system and draws fluid circulation;
The described anti-icing fluid circulatory system and drawing between fluid circulation intercouples by positive permeability apparatus (8).
2. the rectifying regenerating unit of heat source tower anti-freezing solution according to claim 1, is characterized in that: the described anti-icing fluid circulatory system comprises the first control valve (2), anti-icing fluid booster pump (3), filter (4), the first solution heat exchanger (5), the second solution heat exchanger (6) and heater (7);
Low-temperature liquid pipe, the low-temperature liquid pipe of the second solution heat exchanger (6) and the water back of heater (7) of the taphole of described heat source tower heat pump system, the first control valve (2), anti-icing fluid booster pump (3), filter (4), the first solution heat exchanger (5) interconnect successively;
The water back of described heater (7) also interconnects with positive permeability apparatus (8) anti-icing fluid entrance; The anti-icing fluid outlet of described positive permeability apparatus (8) is by being connected with the closed circuit that the second control valve (9) forms with heat source tower heat pump system after the high-temp liquid pipeline of the first solution heat exchanger (5);
The described fluid circulation that draws comprises the 3rd control valve (10), the 3rd solution heat exchanger (11), rectifier (12), condenser (13), tower top booster pump (14), draws solution booster pump (15) and condensate pump (16);
The liquid that draws of described positive permeability apparatus (8) exports on the one hand by interconnecting with the liquid entrance that draws of rectifier (12) after the low-temperature liquid pipe of the 3rd control valve (10) and the 3rd solution heat exchanger (11);
The overhead vapours outlet of rectifier (12) condensation pipe, the tower top booster pump (14) by condenser (13) and draw solution booster pump (15) and be connected with the liquid import of drawing of permeability apparatus (8) just afterwards successively;
At the bottom of the tower of rectifier (12), delivery port is connected with the high-temp liquid pipeline of the second solution heat exchanger (6) with the high-temp liquid pipeline of condensate pump (16), the 3rd solution heat exchanger (11) successively;
The liquid outlet of drawing of described positive permeability apparatus (8) is connected with the liquid import of drawing of positive permeability apparatus (8) in addition on the one hand after drawing solution booster pump (15).
3. the rectifying regenerating unit of heat source tower anti-freezing solution according to claim 2, it is characterized in that: in the time that heat source tower heat pump system is open type, cooling pipe one end of described condenser (13) is connected with the closed circuit that the second control valve (9) forms with heat source tower heat pump system;
Other one end of described condenser (13) cooling pipe is connected with the taphole of heat source tower heat pump system by the 4th control valve (17);
Tower top cooling pipe one end in described rectifier (12) is connected with the closed circuit that the second control valve (9) forms with heat source tower heat pump system;
Other one end of tower top cooling pipe in described rectifier (12) is connected with the taphole of heat source tower heat pump system by the 4th control valve (17).
4. the rectifying regenerating unit of heat source tower anti-freezing solution according to claim 2, it is characterized in that: in the time that heat source tower heat pump system is enclosed, one end of described condenser (13) cooling pipe is connected with the circulation solution outlet of heat source tower heat pump system by the 4th control valve (17);
Other one end of cooling pipe of described condenser (13) is connected with the circulation solution import of heat source tower heat pump system;
One end of tower top cooling pipe in described rectifier (12) is connected with the circulation solution outlet of heat source tower heat pump system by the 4th control valve (17);
Other one end of tower top cooling pipe and the circulation solution import of heat source tower heat pump system in described rectifier (12) are connected.
5. according to the rectifying regenerating unit of the heat source tower anti-freezing solution described in claim 3 or 4, it is characterized in that: the anti-freezing solution using in described working subsystem and the anti-icing fluid circulatory system is organic aqueous solution or aqueous solution of inorganic matter;
Water in described organic aqueous solution or aqueous solution of inorganic matter is low boiling component;
The described solution that draws using in fluid circulation that draws is selected the organic aqueous solution dissolving each other completely with water;
Water in the organic aqueous solution that described and water dissolves each other is completely high boiling component.
6. the rectifying regenerating unit of heat source tower anti-freezing solution according to claim 5, is characterized in that: the interior anti-icing fluid entrance of described positive permeability apparatus (8) and anti-icing fluid export and draws liquid entrance and draw between liquid outlet and isolate by pellicle;
Described pellicle optionally passes through moisture, and anti-freezing solution and all the other components of drawing in solution are had to very high crown_interception.
7. the rectifying regenerating unit of heat source tower anti-freezing solution according to claim 6, is characterized in that: described heat source tower heat pump system is mainly made up of heat source tower, heat pump two parts.
8. the rectifying regenerating unit of heat source tower anti-freezing solution according to claim 7, is characterized in that: boil water back and the external thermal source of described rectifier (12) bottom are interconnected again.
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| CN114526559A (en) * | 2022-02-25 | 2022-05-24 | 青岛北冰洋冷暖能源科技有限公司 | High-efficient dehydration of heat source tower maintains system |
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