CN100554827C - two-stage first class absorption heat pump - Google Patents

two-stage first class absorption heat pump Download PDF

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Publication number
CN100554827C
CN100554827C CNB2006100441796A CN200610044179A CN100554827C CN 100554827 C CN100554827 C CN 100554827C CN B2006100441796 A CNB2006100441796 A CN B2006100441796A CN 200610044179 A CN200610044179 A CN 200610044179A CN 100554827 C CN100554827 C CN 100554827C
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low
pressure
heat
refrigerant vapour
temperature level
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CNB2006100441796A
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Chinese (zh)
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CN1877227A (en
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李华玉
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李华玉
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Abstract

The invention provides two-stage first class absorption heat pump, belong to low temperature exhaust heat and utilize technical field of heat pumps.It mainly is made up of evaporimeter, low-pressure absorber, low pressure generator, high pressure absorber, high pressure generator, condenser, hybrid heater, choke valve, some circulating pumps and solution heat exchanger, be divided into the low temperature level of extracting waste heat and the external high temperature level of heat supply, hybrid heater is housed between the two-stage, and is connected with refrigerant vapour pipe (leading to) road by cryogen liquid pipeline.In the low temperature level, part refrigerant medium after throttling step-down, cooling absorbs waste heat and evaporates, refrigerant vapour enters low-pressure absorber by solution absorption, heat release, heating is through another part cryogen liquid of low-pressure absorber, the latter in hybrid heater with low pressure generator in the refrigerant vapour that produces mix, form the high pressure absorber that steam enters the high temperature level.This invention utilizes integrated device to realize that the two-stage of waste heat supply temperature promotes, rational in infrastructure, simplification, and under the same conditions, heat supply temperature is improved, and other parameter improves.

Description

Two-stage first class absorption heat pump
Technical field:
The invention belongs to low temperature exhaust heat and utilize technical field of heat pumps.
Background technology:
Adopting the absorption heat pump technology to carry out UTILIZATION OF VESIDUAL HEAT IN is effective means, has reasonable energy-saving and environmental protection and economic benefit.Lower in residual heat resources relative deficiency, temperature, or the user's request temperature (initial temperature that comprises customer requirements, promptly enter the medium temperature of first kind absorption heat pump absorber) under the high situation, adopt the single-stage first kind absorption heat pump can't be, also just can't reach and effectively utilize low temperature exhaust heat, realize energy-conservation purpose with the temperature increase of waste heat to the degree that the user needs.In the case, adopt the different single-stage first kind absorption heat pump of heat supply temperature to form heat pump united heating system, at first extract waste heat by low temperature level first kind absorption heat pump, drive the waste heat that the hot heat production that constitutes this grade heat pump is used as high temperature level first kind absorption heat pump together with it, can reach and utilize waste heat, realization purpose of energy saving; In some cases, also can take heat pump to connect with other firing equipment to carry out heat supply to finish, but the problem of this all will bring aspects such as system complex, investment are excessive, security reduction, this also makes the control of system and regulating system complicated.
Summary of the invention:
The objective of the invention is to provide a kind of process structure comparatively simple two-stage first class absorption heat pump, it can rise to the waste heat of lower temperature higher temperature, has expanded the scope of low temperature exhaust heat to high temperature user heat supply of utilizing.
The object of the present invention is achieved like this, and it mainly is made up of evaporimeter, low-pressure absorber, low pressure generator, high pressure absorber, high pressure generator, condenser, hybrid heater, choke valve, some circulating pumps and solution heat exchanger (option); On the integrated artistic, can be divided into the low temperature level of extracting waste heat and the external high temperature level of heat supply.The low temperature level mainly is made up of evaporimeter, low-pressure absorber, low pressure generator and hybrid heater; The high temperature level mainly is made up of high pressure absorber, high pressure generator and condenser, auxiliary spare part and control corresponding systems such as the auxilliary pump in necessity, valve, pipe fitting.Evaporimeter has cryogen liquid pipeline to link to each other with condenser by choke valve, evaporimeter also has the refrigerant vapour passage to link to each other with low-pressure absorber with cryogen liquid pipeline respectively, be communicated with the solution pipeline by first solution circulation pump between low-pressure absorber and the low pressure generator, be communicated with the solution pipeline by second solution circulation pump between high pressure absorber and the high pressure generator, there is the heated medium pipeline to link to each other between high pressure absorber and the condenser, high pressure generator has the refrigerant vapour passage to link to each other with condenser, it is characterized in that: between low temperature level and high temperature level, hybrid heater is housed, link to each other with the refrigerant vapour pipeline by cryogen liquid pipeline, low-pressure absorber links to each other with hybrid heater with the refrigerant vapour passage by cryogen liquid pipeline respectively with low pressure generator, hybrid heater links to each other with high pressure absorber by the refrigerant vapour passage, the high temperature cryogen liquid that comes from condenser enters evaporimeter after the choke valve throttling, draw waste heat, part cryogen liquid obtains evaporation, another part is in cryogen liquid under the saturated liquid state of low pressure after pump pressurization, enter hybrid heater again after entering low-pressure absorber heat absorption with supercooled state, mix in hybrid heater with refrigerant vapour from low pressure generator, the refrigerant vapour that hybrid heater produces enters the high pressure absorber of high temperature level, becomes the needed refrigerant vapour of high pressure generator.The high pressure of above indication, low pressure and high temperature, low temperature are meant that pressure, the temperature between the two has relative size, are not actual high-voltage, the high temperature values of finger pressure power, temperature.
This invention adopts hybrid heater to replace carrying out condensation-evaporimeter that heat transmits at two inter-stages originally, have compact conformation, low, the simple relatively advantage of control system of investment, have simultaneously that flow process is simple, the heat transfer link is succinct, have better advantage at the aspects such as technological parameter that improve heat supply temperature or utilize the waste heat of low temperature more and improve heat pump.
Description of drawings:
Fig. 1 is according to provided by the present invention, drives hot parallel connection and enters the high and low pressure generator, the two-stage first class absorption heat pump system architecture and the schematic flow sheet of solution independent operating between two-stage.
Fig. 2 is according to provided by the present invention, drives the heat series connection and enters high and low pressure generator, the two-stage first class absorption heat pump system architecture and the schematic flow sheet of solution independent operating between two-stage.
Fig. 3 is according to provided by the present invention, drives hot parallel connection and enters the high and low pressure generator, the two-stage first class absorption heat pump system architecture and the schematic flow sheet of solution series operation between two-stage.
Fig. 4 is according to provided by the present invention, drives hot parallel connection and enters the high and low pressure generator, and solution is independent operating between two-stage, the two-stage first class absorption heat pump system architecture and the schematic flow sheet of the operation of heat supply level economic benefits and social benefits.
Fig. 5 is according to provided by the present invention, drives hot parallel connection and enters the high and low pressure generator, and solution is series operation between two-stage, and waste heat extracts the two-stage first class absorption heat pump system architecture and the schematic flow sheet of level economic benefits and social benefits operation.
Among the figure, 1-evaporimeter, 2-low-pressure absorber, the 3-low pressure generator, 4-high pressure absorber, 5-high pressure generator, the 6-condenser, 7-choke valve, 8-cryogen liquid pump, 9-first solution circulation pump, 10-second solution circulation pump, 11-hybrid heater, 12,13,16-solution heat exchanger (belonging to option), 14-control valve, 15-high temperature level second generator, 17-low temperature level second generator, F1~F4-controls to adjust valve.
Among the figure, a-drives heat (the hot temperature of the driving of low temperature level can be lower than the temperature of the driving heat of high temperature level), the b-heated medium, the c-high pressure absorber goes out weak solution, the d-high pressure generator goes out concentrated solution, the e-high pressure generator goes out refrigerant vapour, and the f-condenser goes out cryogen liquid, and the g-low-pressure absorber goes out weak solution, the h-low pressure generator goes out concentrated solution, i-waste heat medium, the j-evaporimeter goes out cryogen liquid, and the k-evaporimeter goes out refrigerant vapour, the l-low pressure generator goes out refrigerant vapour, the m-hybrid heater goes out refrigerant vapour, goes out the refrigerant vapour of economic benefits and social benefits heat supply end low pressure generator during the heat supply of n-economic benefits and social benefits, goes out the cryogen liquid of economic benefits and social benefits heat supply end low pressure generator during the heat supply of o-economic benefits and social benefits.
Embodied A, B two-stage among Fig. 1: A-high temperature level, externally heat supply mainly comprises high pressure absorber 4, high pressure generator 5, condenser 6, second solution circulation pump 10 and solution heat exchanger 13; B-low temperature level is extracted waste heat, mainly comprises evaporimeter 1, low-pressure absorber 2, low pressure generator 3, choke valve 7, cryogen liquid pump 8, first solution circulation pump 9 and solution heat exchanger 12.
The specific embodiment:
Describe the present invention in detail below in conjunction with accompanying drawing and example.
With provided by the present invention, drive hot parallel connection and enter height, low pressure generator, the two-stage first class absorption heat pump of solution independent operating between two-stage is an example, as shown in Figure 1, the object of the present invention is achieved like this, 1. on the structure, this two-stage first class absorption heat pump is made up of low temperature level B and high temperature level A two parts, the high temperature level is mainly by high pressure absorber 4, high pressure generator 5 and condenser 6 are formed, the low temperature level is mainly by evaporimeter 1, low-pressure absorber 2, low pressure generator 3 and hybrid heater 11 are formed, and be auxilliary in the pump of necessity, valve, auxiliary spare part and control corresponding systems such as pipe fitting; In the low temperature level, the elevated pressures that the low temperature level produces, the refrigerant vapour of temperature enter the absorber of high temperature level, by the concentrated solution from the high pressure generator of high temperature level part absorb, heat release, finish being heated the first step heating of fluid; The high pressure generator of high temperature level will be from the heating of the weak solution of high pressure absorber, produce the more refrigerant vapour of high pressure and temperature under the driving of elevated temperature heat, enters condenser and carries out the heating of second step, externally heat supply to being heated fluid.The low temperature level has played the effect of high temperature level evaporimeter.Linking to each other with refrigerant vapour by cryogen liquid between the two-stage---high temperature level condenser links to each other by the evaporimeter of choke valve with the low temperature level; Low-pressure absorber 2 is connected with hybrid heater 11 with the refrigerant vapour pipeline with cryogen liquid pipeline respectively with low pressure generator 3, the outlet refrigerant vapour pipeline of low temperature level hybrid heater links to each other with the absorber of high temperature level, and the refrigerant vapour that hybrid heater produced enters absorber and absorbed by the concentrated solution from high temperature level high pressure generator.2. in low temperature level part, the part refrigerant medium of cryogen liquid f after throttling step-down, cooling that comes from high temperature level condenser absorbs waste heat and evaporates, becomes refrigerant vapour k, refrigerant vapour k enters low-pressure absorber 3 and is absorbed, emits heat by solution, heating is through another part cryogen liquid j of low pressure generator 3, the latter hybrid heater 11 in low pressure generator 3 in the refrigerant vapour l of generation mix, form the needed refrigerant vapour m of high temperature level and enter the high pressure absorber 4 of high temperature level; 3. in high temperature level part, the elevated pressures that the low temperature level produces, the refrigerant vapour m of temperature enter the absorber 4 of high temperature level, by the concentrated solution d from high temperature level part high pressure generator 5 absorb, heat release, finish being heated the first step heating of fluid b; High temperature level high pressure generator 5 will be from the weak solution c of high pressure absorber 4 heating, produce the more refrigerant vapour e of high pressure and temperature under the driving of elevated temperature heat a, enters 6 pairs of condensers and is heated fluid b and carries out the heating of second step, externally heat supply.
The concrete workflow of each fluid:
1. waste heat medium flow process---waste heat medium i enters evaporimeter 1 heating refrigerant medium.
2. the high-temperature medium flow process---the high temperature level drives hot a and enters high pressure generator 5, finishes the heating from the weak solution c of high pressure absorber 4, and the refrigerant vapour e that produces high temperature enters condenser 6; The low temperature level drives hot a (can with high temperature level drive heat identical or different) and enters low pressure generator 3, finishes the heating from the weak solution g of low-pressure absorber 2, produces refrigerant vapour l and enters hybrid heater 11.
3. the heated medium flow process---heated medium b at first enters high pressure absorber 4, draws concentrated solution d and absorbs liberated heat in the refrigerant vapour m process, and temperature obtains improving for the first time; Then enter condenser 6, draw the heat release of refrigerant vapour e, temperature provides the user after raising.
4. refrigerant vapour flow process---high temperature level adds hot fluid b from the refrigerant vapour e of high pressure generator 5 in condenser 6, condensation becomes liquid, enters evaporimeter 1 after choke valve 7 throttlings; In the low temperature level, a refrigerant medium part that enters evaporimeter 1 is heated and is vaporized into refrigerant vapour k, enters low-pressure absorber 2, is absorbed by the solution h from the higher concentration of low pressure generator 3, emits heat; Another part cryogen liquid j enters low-pressure absorber 2 after cryogenic fluid pump 8 pressurizations, draw in the absorption process and enter hybrid heater 11 behind the liberated heat, be mixed into the needed refrigerant vapour m of high temperature level with refrigerant vapour l from low pressure generator 3, enter the high pressure absorber 4 of high temperature level, d absorbs by concentrated solution.
5. solution flow process---low temperature level, the solution h that comes from low pressure generator 3 enters low-pressure absorber 2, absorb the refrigerant vapour k of flash-pot 1 to become weak solution g, squeeze into low pressure generator 3 through first solution circulation pump 9, under the heating that drives hot a, discharge refrigerant vapour l, become the solution h of higher concentration again; The high temperature level, the solution d that comes from high pressure generator 5 enters high pressure absorber 4, absorption becomes weak solution c from the refrigerant vapour m of hybrid heater 11, squeeze into high pressure generator 5 through second solution circulation pump 10, under the heating that drives hot a, discharge the refrigerant vapour e under the high temperature, then become the solution d of high concentration again.
Shown in Figure 2 is to drive the heat series connection to enter the high and low pressure generator, the two-stage first class absorption heat pump of solution independent operating between two-stage, its structure is identical with heat pump shown in Figure 1, the workflow of its solution, cryogen liquid and refrigerant vapour is all identical with heat pump shown in Figure 1, the different hot a that just drives be introduced into hiigh pressure stage generator 5 to enter 3 series operations of low-pressure stage generator again.
Figure 3 shows that the two-pump type two-stage first class absorption heat pump, drive hot parallel connection and enter the high and low pressure generator, the place different with heat pump shown in Figure 1 is that the solution between the two-stage links together---the weak solution that enters high pressure generator 5 is from low-pressure absorber 2, and the solution that enters low pressure generator 3 is from high pressure absorber 4; Control valve 14 (option) is arranged between high pressure absorber 4 and the low pressure generator 3, and remainder is all identical.
Figure 4 shows that the two-stage first class absorption heat pump of high temperature level economic benefits and social benefits operation, its structure is with respect to heat pump shown in Fig. 1~3, inequality in the high temperature level, its two generators 5 of high temperature level design and 15, by the economic benefits and social benefits mode operation, other parts are identical, the structure relative complex, heat supply temperature is relatively low, but energy-saving efficiency is higher relatively.
Figure 5 shows that the two-stage first class absorption heat pump of low temperature level economic benefits and social benefits operation, its structure is with respect to heat pump shown in Fig. 1~3, inequality in the low temperature level, its two generators 3 of low temperature level design and 17, by the economic benefits and social benefits mode operation, other parts are identical, the structure relative complex some, heat supply temperature is also more relatively low, and energy-saving efficiency is higher relatively.
Fig. 4 and Fig. 5 are combined, can be designed as the two-stage first class absorption heat pump that high temperature level, low temperature level are the economic benefits and social benefits operation, but this heat pump complex structure, manufacture difficulty strengthens, and cost is also high.
Two-stage first class absorption heat pump proposed by the invention is compared with first-class absorption type heat pump associating step heating system, has following effect and advantage:
1. integrated device realizes that the two-stage of waste heat supply temperature promotes.
2. enlarged the temperature working range of first-class absorption type heat pump.
3. adopt hybrid heater to substitute Condensation-Evaporator, rational in infrastructure, succinct, reduced equipment investment.
4. adopt hybrid heater that the thermal parameter of heat pump is improved, under the same conditions, heat supply temperature (temperature that waste heat promotes) is further enhanced; Maybe can utilize the more waste heat of low temperature; Or the temperature of concentrated solution in the reduction generator, avoid or reduce the corrosion that solution herein may cause equipment.Enlarge operating temperature range, expanded the application scenario of first kind absorption heat pump.
5. corresponding the obtaining of control system simplified, and the security of heating system also obtains corresponding raising.

Claims (1)

1. two-stage first class absorption heat pump, mainly by evaporimeter (1), low-pressure absorber (2), low pressure generator (3), high pressure absorber (4), high pressure generator (5), condenser (6), choke valve (7), hybrid heater (11), cryogenic fluid pump (8), first solution circulation pump (9) is formed with second solution circulation pump (10), be divided into the low temperature level of extracting waste heat and external high temperature level two parts of heat supply, evaporimeter (1) has cryogen liquid pipeline to link to each other with condenser (6) through choke valve (7), evaporimeter (1) also has the refrigerant vapour passage to link to each other with low-pressure absorber (2) with cryogen liquid pipeline respectively, be communicated with the solution pipeline by first solution circulation pump (9) between low-pressure absorber (2) and the low pressure generator (3), be communicated with the solution pipeline by second solution circulation pump (10) between high pressure absorber (4) and the high pressure generator (5), there is the heated medium pipeline to link to each other between high pressure absorber (4) and the condenser (6), high pressure generator (5) has the refrigerant vapour passage to link to each other with condenser (6), it is characterized in that: hybrid heater (11) is housed between low temperature level and high temperature level, link to each other with the refrigerant vapour pipeline by cryogen liquid pipeline, low-pressure absorber (2) links to each other with hybrid heater (11) with the refrigerant vapour passage by cryogen liquid pipeline respectively with low pressure generator (3) simultaneously, hybrid heater (11) links to each other with high pressure absorber (4) by the refrigerant vapour passage, the high temperature cryogen liquid that comes from condenser (6) enters evaporimeter (1) after choke valve (7) throttling, draw waste heat, part cryogen liquid obtains evaporation, another part is in cryogen liquid under the saturated liquid state of low pressure after pump (8) pressurization, enter hybrid heater (11) again after entering low-pressure absorber (2) heat absorption with supercooled state, mix in hybrid heater (11) with refrigerant vapour from low pressure generator (3), the refrigerant vapour that hybrid heater (11) produces enters the high pressure absorber (4) of high temperature level, becomes the needed refrigerant vapour of high pressure generator (5).
CNB2006100441796A 2006-05-13 2006-05-13 two-stage first class absorption heat pump CN100554827C (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101968286A (en) * 2010-10-10 2011-02-09 李华玉 Double absorption-double generation system and multi-terminal heat supply third kind absorption heat pumps
CN101975484A (en) * 2009-11-09 2011-02-16 李华玉 Solution serial circulation two-stage first-type absorption heat pump with single effect serving as first grade
CN101995111A (en) * 2009-11-11 2011-03-30 李华玉 Two-stage first type absorption type heat pump using heat return type single stage as first stage

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CN1995866B (en) * 2006-12-19 2010-05-19 李华玉 Two-stage and multi-stage second-class absorption heat pump
CN101000180B (en) * 2006-12-27 2010-05-19 李华玉 Two-stage and three-stage absorption refrigeration machine
CN101101161B (en) * 2007-07-30 2010-05-19 李华玉 Composite second category absorption heat pump
CN101493270B (en) * 2008-01-22 2011-05-18 苏庆泉 Absorption heat pump system and heat-production method
CN101349486A (en) * 2008-08-26 2009-01-21 李华玉 Composite absorption type heat pump formed by increasing high temperature heat supply end
CN101706174A (en) * 2009-11-11 2010-05-12 李华玉 Two-stage first class absorption heat pump taking double effect as first stage
WO2011091560A1 (en) * 2010-01-30 2011-08-04 Li Huayu Combined absorption-generation system and third-type absorption heat pump
CN102072583B (en) * 2010-12-28 2013-03-20 李华玉 Regenerative absorption-generation system and regenerative third-type absorption heat pump
CN102828790A (en) * 2011-06-14 2012-12-19 同方节能工程技术有限公司 Low-pressure heating system for power plant
CN102828789A (en) * 2011-06-14 2012-12-19 同方节能工程技术有限公司 Low-voltage heating equipment of power plant
CN105865075A (en) * 2016-06-07 2016-08-17 松下制冷(大连)有限公司 Low-temperature hot water large-temperature-difference lithium bromide absorbing type refrigerating unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101975484A (en) * 2009-11-09 2011-02-16 李华玉 Solution serial circulation two-stage first-type absorption heat pump with single effect serving as first grade
CN101995111A (en) * 2009-11-11 2011-03-30 李华玉 Two-stage first type absorption type heat pump using heat return type single stage as first stage
CN101995111B (en) * 2009-11-11 2012-11-14 李华玉 Two-stage first type absorption type heat pump using heat return type single stage as first stage
CN101968286A (en) * 2010-10-10 2011-02-09 李华玉 Double absorption-double generation system and multi-terminal heat supply third kind absorption heat pumps

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