CN202521939U - Heat pump system and drying system - Google Patents

Heat pump system and drying system Download PDF

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Publication number
CN202521939U
CN202521939U CN2012201066680U CN201220106668U CN202521939U CN 202521939 U CN202521939 U CN 202521939U CN 2012201066680 U CN2012201066680 U CN 2012201066680U CN 201220106668 U CN201220106668 U CN 201220106668U CN 202521939 U CN202521939 U CN 202521939U
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CN
China
Prior art keywords
steam
pipeline
heat exchanger
heat pump
heat
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Expired - Fee Related
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CN2012201066680U
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Chinese (zh)
Inventor
苏庆泉
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Beijing University of Technology
University of Science and Technology Beijing USTB
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University of Science and Technology Beijing USTB
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Priority to CN2012201066680U priority Critical patent/CN202521939U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/27Relating to heating, ventilation or air conditioning [HVAC] technologies
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/62Absorption based systems

Abstract

The utility model relates to a heat pump system and a drying system. The heat pump system comprises an absorber, an evaporator, a generator and a flash evaporating tank. An absorption heat exchanger is disposed in the absorber, an evaporation heat exchanger is disposed in the evaporator, and a generation heat exchanger is disposed in the generator. An inlet of the generation heat exchanger is connected with a supply steam pipeline, and an outlet of the top of the generator is connected with a process steam pipeline. An inlet of the flash evaporating tank is connected with an outlet of the generation heat exchanger through a pipeline, and a drain valve and one throttle valve are respectively disposed on the pipeline. An outlet of the top of the flash evaporating tank is connected with the process steam pipeline, an outlet of the bottom of the flash evaporating tank is connected with an inlet of the evaporator through a pipeline, and the other throttle valve is disposed on the pipeline. The bottom of the flash evaporating tank is further provided with a water discharge pipe. The heat pump system utilizes pressure difference between supply steam and process steam to drive a heat pump to circulate, and therefore temperature grade promotion of low temperature exhaust heat is achieved and purposes of effectively recycling waste heat and improving energy utilization efficiency are also achieved.

Description

A kind of heat pump and drying system
Technical field
The utility model relates to a kind of heat pump techniques of Thermal Power Engineering Field, and particularly a kind of pressure differential with supply steam and process steam is the novel heat pump and the drying system of driving force.
Background technology
Two component absorbent solutions are usually adopted in absorption circulation, claim that traditionally low boiling component is a working medium, and high boiling component is an absorbent, and it is right that the two forms working medium, and common have with water to be working medium, to be that the water-lithium bromide working medium of absorbent is right with the lithium bromide.Absorption type heat pump system utilizes absorbent solution can separate out refrigerant vapor under certain condition, under another condition, can absorb this characteristic of refrigerant vapor again consumingly and realize refrigeration or heat supply.Existing absorption type heat pump system mainly comprises: in establish heat exchanger generator, in establish heat exchanger condenser, in establish heat exchanger evaporimeter and in establish the absorber of heat exchanger.Generator links to each other through vapor passageway with condenser, and evaporimeter links to each other through vapor passageway with absorber.Absorbent solution circulates between generator and absorber through the absorbent solution pipeline.
Common heating system generally adopts steam boiler or to the user supply steam of higher temperature and pressure, general supply steam is provided by steam power plant is temperature 180-220 ℃, the high-grade thermal source of pressure 0.9-1.3MPa., the required process steam of user does not often need so high pressure and temperature in practical application.Such as the drying system of routine, usually only need saturation temperature 100-140 ℃, the steam of pressure 0.1-0.4MPa can realize the drying of material, especially high unfavorable on the contrary for some heat sensitive material baking temperatures.Therefore, as shown in Figure 4, what existing drying system adopted usually that 60 pairs on choke valve supplies with that jet chimney 40 provides carries out cooling decompression to produce required process steam in the process steam pipeline 44 to supplying with steam.Like this, supply with just being wasted in vain of the original high-energy grade of steam.On the other hand, the waste heat of technology discharge is also owing to grade is crossed the low recycle that is difficult to obtain.
The utility model content
The purpose of the utility model is to provide a kind of new heat pump, and technical problem to be solved is to utilize the pressure differential that exists between supply steam and the process steam as driving force, realizes that the temperature grade of low grade residual heat promotes or refrigeration.
The purpose of the utility model is also to provide a kind of drying system; Technical problem to be solved is to utilize the pressure differential that exists between supply steam and the process steam as driving force; Reclaim and improve the grade of drying process institute exhaust heat; And its preheating thermal source as drying medium carried out recycle, thereby realize the improvement significantly of drying process energy utilization efficiency.
The purpose of the utility model and solve its technical problem and adopt following technical scheme to realize.A kind of heat pump according to the utility model proposition; Comprise absorber, evaporimeter, generator and condenser; Be provided with the absorption heat exchanger in the absorber, be provided with evaporating heat exchanger in the evaporimeter, be provided with the generation heat exchanger in the generator; Be provided with the solution circulating line between described absorber and the generator; Be used to make absorbent solution between absorber and generator, to circulate, the inlet of said generation heat exchanger is connected with the supply jet chimney, and the top exit of said generator is connected with the process steam pipeline; The inlet of said flash tank is connected through pipeline with the outlet of said generation heat exchanger; And on this pipeline, be provided with and put drain valve and choke valve, the effect of said drain valve is to guarantee to supply with steam all condensations in heat exchanger takes place, the effect of said choke valve is that the condensed water with high pressure is decompressed to the required pressure of process steam.The top exit of flash tank is connected with said process steam pipeline; The outlet at bottom of flash tank is connected through pipeline with the inlet of said evaporimeter; And on this pipeline, be provided with choke valve; Be used for the condensed water of flash tank is imported evaporimeter, the bottom of flash tank also is provided with drainage pipeline and stop valve, is used for unnecessary condensed water is discharged.
Preferable; Aforesaid heat pump; Also be provided with steam jet heat pump; The Working-fluid intaking of said steam jet heat pump is connected with the pipeline of supplying with steam, and the driving fluid inlet of steam jet heat pump is connected with the outlet of said condensing heat exchanger, and the compressed fluid outlet of steam jet heat pump is connected with the pipeline of process steam.The effect of said steam jet heat pump is the pressure that further improves the steam of generator and evaporator generation.
Preferable, aforesaid heat pump is provided with solution heat exchanger on described solution circulating line, is used for carrying out heat exchange from the absorbent solution of the high temperature of generator output and the absorbent solution from the low temperature of absorber output.
A kind of drying system according to the utility model proposition; It comprises above-mentioned heat pump; Also comprise hothouse, air preheater, air heater and humid air heat exchanger; This air preheater is connected with absorption heat exchanger in the heat pump and forms the loop, and this humid air heat exchanger is connected with evaporating heat exchanger in the heat pump and forms the loop, and this air heater is connected with process steam pipeline in the heat pump.
The utility model compared with prior art has following significantly advantage and beneficial effect:
The heat pump of the utility model is through adopting novel absorption heat pump circulation; And then absorption heat pump and steam jet heat pump have been organically combined; To supply with the pressure differential that exists between steam and the process steam is driving force; The grade of having accomplished low grade residual heat promotes or refrigeration, realized by its absorb heat exchanger to user's heat supply or by its evaporating heat exchanger to user's cooling or cold and heat combined supply.This heat pump is by condensing heat exchanger outlet output process steam; It approaches to be input to the supply steam that heat exchanger takes place on quantity and heat content; Thereby in fact consume to supply with steam and only be effectively to have utilized the steam pressure drop that has been wasted originally; So the operating cost of heat that this heat pump provides or cold is extremely low and economic benefit is splendid.
The drying system of the utility model; Then be to be driving force to supply with the pressure differential that exists between steam and the drying process steam; Waste heat with drying process institute hydrofuge air is a low-temperature heat source; The heat energy that heat pump is absorbed heat exchanger output is used for preheating of air, thereby can reduce the energy consumption of drying system significantly.This drying system is because institute's input heat pump driving force and low-temperature heat source all are free, so economic benefit is splendid.The drying medium of the utility model is an air, also can be other fluids such as nitrogen or water.
Above-mentioned explanation only is the general introduction of the utility model technical scheme, in order more to know the technological means of understanding the utility model, and can implement according to the content of specification, below with the preferred embodiment of the utility model and conjunction with figs. specify as after.
Description of drawings
Fig. 1 is the flow chart of the heat pump of the utility model embodiment 1.
Fig. 2 is the flow chart of the heat pump of the utility model embodiment 2.
Fig. 3 is the flow chart of the drying system of the utility model embodiment 3.
Fig. 4 is the flow chart of existing drying system.
The specific embodiment
In order further to set forth the utility model is to reach technological means and the effect that predetermined utility model purpose is taked; Below in conjunction with accompanying drawing and preferred embodiment; To its specific embodiment of heat pump, structure, characteristic and the effect thereof that proposes according to the utility model, specify as after.
Seeing also shown in Figure 1ly, is the flow chart of the heat pump of the utility model embodiment 1.The heat pump that present embodiment proposes is made up of absorber 10, evaporimeter 11, generator 20, flash tank 46 and supply jet chimney 40.
Described absorber 10 is communicated with through first path 12 with evaporimeter 11.In described absorber 10, be provided with absorbent solution.Be provided with in the described absorber and absorb heat exchanger 15; In this absorption heat exchanger 15 heat-carrying agent is arranged; The high temperature that produces in the absorber 10 absorbs heat and adds the heat-carrying agent in the heat absorption heat exchanger, makes this heat-carrying agent obtain heating up, thereby forms the high temperature heat source that provides to the user.
Be provided with working medium in the described evaporimeter 11.In this evaporimeter 11, also be provided with evaporating heat exchanger 16, outside low-temperature heat source makes working medium be evaporated to refrigerant vapor through this evaporating heat exchanger 16.This refrigerant vapor enters in the absorber 10 through first path 12, thereby the absorbent solution that is absorbed the high concentration in the device 10 absorbs, and discharges the absorption heat of high temperature, and said absorbent solution obtains dilution.Thus, described outside low-temperature heat source is converted into described high temperature heat source and provides to the user, and simultaneously, evaporating heat exchanger 16 can be realized to the user low-temperature receiver being provided.
Described generator 20, in be provided with absorbent solution and heat exchanger 25 take place.The HTHP supply steam that is provided by supply jet chimney 40 is driving heat source condensation in the heat exchanger 25 taking place and to generator 20 condensation heat is being provided under the effect of steam trap 27; Thereby heating absorbent solution wherein; Make it produce refrigerant vapor and as process steam from the output of generator 20 top exits, the concentration of absorbent solution is improved simultaneously.The top exit pipeline 41 of said generator 20 is connected with process steam pipeline 44.
The inlet of said flash tank 46 is connected through pipeline with the outlet of said generation heat exchanger 25, and on this pipeline, is provided with steam trap 27 and choke valve 28.The high pressure condensed water that takes place to produce in the heat exchanger 25 is via steam trap 27; Behind the pressure that is decompressed to process steam under the effect of choke valve 28, get into flash tank 46; The part of condensed water flashes to steam in said flash tank 46, and as the top exit output of process steam from flash tank 46.The top exit pipeline 42 of said flash tank 46 is connected with process steam pipeline 44.
Be provided with the solution circulating line between described absorber 10 and the generator 20, be used to make absorbent solution between absorber 10 and generator 20, to circulate.The solution that partially absorbs in the absorber 10 is transported in the generator 20, and the solution that partially absorbs in the generator 20 is transported in the absorber 10.Because the absorbent solution in the absorber 10 is to be used to absorb refrigerant vapor, the absorbent solution in the generator is to be used to produce refrigerant vapor, so the concentration of the absorbent solution of generator 20 outputs is higher than the concentration of the absorbent solution of absorber 10 outputs.That is to say, carried out the regenerative process of absorbent solution in the absorber by generator 20.For better refrigerant vapor being absorbed, in absorber 10, be provided with sprinkling equipment 13, be used to spray absorbent solution from the high concentration of generator.For better producing refrigerant vapor, in generator 20, be provided with sprinkling equipment 23, be used to spray absorbent solution from the low concentration of absorber.
Be provided with the connection pipeline between the outlet at bottom of described evaporimeter 11 and flash tank 46, and on this connection pipeline, be provided with choke valve 29, be used for condensed water is imported to evaporimeter 11 from flash tank 46.For better producing refrigerant vapor, in evaporimeter 11, be provided with sprinkling equipment 14, be used to spray liquid refrigerant from base of evaporator output.The bottom of said flash tank 46 also is provided with discharge line and stop valve 47, is used for unnecessary condensed water is discharged.
Because absorber 10 is different with the operating temperature of generator 20; Absorber needs lower temperature; And generator needs higher temperature; So present embodiment is provided with solution heat exchanger 36 on the solution circulating line, be used for carrying out heat exchange from the absorbent solution of the high temperature of generator output and absorbent solution from the low temperature of absorber output.
In addition, also on evaporimeter spray piping and solution circulating line and be provided with delivery pump 33 and delivery pump 34 respectively, on the easy circulating line in solution heat exchanger 36 downstream, choke valve 30 is set.
Seeing also shown in Figure 2ly, is the flow chart of the heat pump of the utility model embodiment 2.In order further to promote the pressure and temperature of institute's production. art steam, also be provided with steam jet heat pump 45.The driving fluid inlet duct 43 of said steam jet heat pump 45 is connected with generator 20 top exit pipelines 41 and flash tank 46 top exit pipelines 42; The Working-fluid intaking of steam jet heat pump 45 is connected with supply jet chimney 40, and the compressed fluid outlet of steam jet heat pump 45 is connected with process steam pipeline 44.High pressure supplying with steam is a drive source, and the pressure and temperature of the process steam under the effect of steam jet heat pump 45 in the process steam pipeline 44 is further improved.
Seeing also shown in Figure 3ly, is the flow chart of the drying system that proposes of the utility model.The drying system of present embodiment comprises heat pump, hothouse 50, air heater 51, air preheater 52 and the humid air heat exchanger 53 of the foregoing description 2.Described hothouse 50 is an air dryer systems of the prior art with air heater 51.Described air preheater 52 is arranged on to air heater and provides on the pipeline of air, its role is to air is carried out preheating, thereby can reduce the energy resource consumption of air heater.This air preheater 52 is connected with absorption heat exchanger 15 in the heat pump and forms the loop, thereby makes the heat that produces in the absorber 10 be used for the drying medium of drying system is carried out preheating.Said air heater 51 is connected with process steam pipeline 44 in the heat pump, thereby makes the heat of process steam be used for the drying medium of drying system is heated.The humid air of discharging from hothouse 50 has bigger humidity and steam latent heat, and humid air heat exchanger 53 is arranged on hothouse and discharges on the pipeline of humid air.This humid air heat exchanger 53 is connected with evaporating heat exchanger 16 and forms the loop, thereby the heat content that can make the humid air that hothouse discharges obtains recycling as the low-temperature heat source of evaporating heat exchanger 16.Like this, above-mentioned drying system utilizes the absorption heat exchanger heat of heat pump output and process steam heat that drying medium is carried out the two-stage heating, thereby has significantly reduced the consumption of supply steam, energy utilization efficiency thereby be improved significantly.
Working medium described in preferable the foregoing description is water.
In the above-described embodiments; Only described the basic procedure of accomplishing the utility model technical scheme, omitted for other parts or the equipment of realizing this flow process, for example; Guarantee pump or valve that each flow of matter direction is required, the working medium of absorbent solution and absorbent.For realizing needed other equipment of the described power circulation system of above-mentioned each embodiment or part, those skilled in the art all can find corresponding technological means in the prior art, repeat no more at this.
The above; It only is the preferred embodiment of the utility model; Not being that the utility model is done any pro forma restriction, though the utility model with the preferred embodiment exposure as above, yet is not in order to limit the utility model; Anyly be familiar with the professional and technical personnel; In not breaking away from the utility model technical scheme scope, make a little change or be modified to the equivalent embodiment of equivalent variations when the technology contents of above-mentioned announcement capable of using, be the content that does not break away from the utility model technical scheme in every case;, all still belong in the scope of the utility model technical scheme any simple modification, equivalent variations and modification that above embodiment did according to the technical spirit of the utility model.

Claims (4)

1. a heat pump is characterized in that comprising absorber, evaporimeter, generator and flash tank, is provided with the absorption heat exchanger in the absorber; Be provided with evaporating heat exchanger in the evaporimeter, be provided with the generation heat exchanger in the generator, be provided with the solution circulating line between described absorber and the generator; The inlet of said generation heat exchanger is connected with the supply jet chimney; The top exit of said generator is connected with the process steam pipeline, and the inlet of said flash tank is connected through pipeline with the outlet of said generation heat exchanger, and on this pipeline, is provided with and puts drain valve and choke valve; The top exit of flash tank is connected with said process steam pipeline; The outlet at bottom of flash tank is connected through pipeline with the inlet of said evaporimeter, and on this pipeline, is provided with choke valve, and the bottom of flash tank also is provided with drainage pipeline.
2. heat pump according to claim 1; It is characterized in that also being provided with steam jet heat pump; The Working-fluid intaking of said steam jet heat pump is connected with the pipeline of supplying with steam; The driving fluid inlet of steam jet heat pump is connected with the outlet of said condensing heat exchanger, and the compressed fluid outlet of steam jet heat pump is connected with the pipeline of process steam.
3. according to each described heat pump of claim 1-2; It is characterized in that; On described solution circulating line, be provided with solution heat exchanger, be used for carrying out heat exchange from the absorbent solution of the high temperature of generator output and absorbent solution from the low temperature of absorber output.
4. drying system; It is characterized in that it comprises each described heat pump of claim 1-3; Also comprise hothouse, air preheater, air heater and humid air heat exchanger; This air preheater is connected with absorption heat exchanger in the heat pump and forms the loop, and this humid air heat exchanger is connected with evaporating heat exchanger in the heat pump and forms the loop, and this air heater is connected with process steam pipeline in the heat pump.
CN2012201066680U 2012-03-20 2012-03-20 Heat pump system and drying system Expired - Fee Related CN202521939U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103322727A (en) * 2012-03-20 2013-09-25 北京科技大学 Heat pump system as well as drying system and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103322727A (en) * 2012-03-20 2013-09-25 北京科技大学 Heat pump system as well as drying system and method
CN103322727B (en) * 2012-03-20 2015-08-12 北京科技大学 A kind of heat pump and drying system and method

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121107

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