CN103388927A

CN103388927A - Two-stage ejection-absorption type heat converter

Info

Publication number: CN103388927A
Application number: CN2013102993067A
Authority: CN
Inventors: 刘辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-07-17
Filing date: 2013-07-17
Publication date: 2013-11-13

Abstract

The invention discloses a two-stage ejection-absorption type heat converter which consists of an absorber, a first solution heat exchanger, a generator, a solution pump, a second solution heat exchanger, a high-temperature generator, a condenser, a first throttling valve, an evaporator, a first-stage ejector, a second-stage ejector and a second throttling valve. Driving steam entering the first-stage ejector ejects low-pressure refrigerant steam entering the first-stage ejector from the generator to form steam with intermediate pressure and temperature; the steam with the intermediate pressure and temperature is further ejected into steam with higher pressure and temperature by driving stream entering the second-stage ejector; the steam with the higher pressure and temperature enters the high-temperature generator and then is used as a driving thermal medium of the high-temperature generator. Due to the adoption of a simple structure, a condensation link which is necessary in the traditional heat converter and deeply constrains the heat converter is omitted and the value of high-quality driving steam is fully exerted. Due to the utilization of a two-stage ejection process, the working efficiency of the ejector is optimized; meanwhile, the requirement on the grade of the driving steam can also be reduced or the requirement on the temperature of a waste heat medium is reduced.

Description

Two-stage injection-Absorption Heat Transformer Characteristics

Technical field

The invention belongs to low temperature heat and field of energy-saving technology.

Background technology

Absorption heat pump is take heat energy as power, adopt contrary Carnot cycle realize heat by low temperature to the high temperature transmission, be particularly suitable for the occasion of a large amount of used heat, the condensed state of used heat can be that gaseous state can be also liquid.common absorption heat pump is divided into first-class absorption type heat pump and second-kind absorption-type heat pump at present, wherein the latter claims again thermal converter, it is a kind of thermal medium that need not to drive, realize the energy saver that heat transmits to high temperature from low temperature, be particularly suitable for the occasion of a large amount of higher temperatures waste heats, but simultaneously, according to the second law of thermodynamics, when part heat grade raises, must reduce grade by some heat, therefore thermal converter needs cooling system, and in industrial its temperature of cooling system commonly used, be not generally very low, therefore can use second-kind absorption-type heat pump is that the occasion of thermal converter is subject to no small restriction, in a lot of situations, because can not satisfying condition, the temperature of cooling system make the energy-saving effect discount even can't realize energy-conservation.

In the face of the different production reality of situation, particularly in industries such as oil extraction, thermoelectricity, oil-refining chemical, Ferrous Metallurgys, extensively there is the waste heat source of a large amount of higher temperatures and by the exhaust steam of certain pressure grade, needed to recycle, adopting the absorption heat pump technology fully to excavate its energy-saving potential significant.

Steam jet heat pump is also the effective technology means of utilizing low-temperature steam exhaust, waste vapour, it is widely used in weaving, papermaking, oil, thermoelectricity etc. are used in the industry of steam as power, it can utilize the available energy of high steam throttling, improve the pressure of low-pressure steam, reclaim the low-pressure steam of emptying or the flash steam of condensed water in high temperature etc. with the high steam energy, thereby, with the integrated steam using of different brackets pressure, reach significant energy-saving effect.But can only recovered steam due to the heat pump of the type,, for the liquid used heat of low temperature,, as the heat that contains in low-temperature water heating, can't directly reclaim, greatly limited its application.

Summary of the invention

two-stage injection-Absorption Heat Transformer Characteristics, by absorber, the first solution heat exchanger, generator, solution pump, the second solution heat exchanger, high-temperature generator, condenser, the first throttle valve, evaporimeter, the one-level injector, secondary injector and the second choke valve form, absorber has the weak solution pipeline to be communicated with generator through the first solution heat exchanger, generator has the solution pipeline through solution pump, the first solution heat exchanger and the second solution heat exchanger are communicated with high-temperature generator, high-temperature generator also has the concentrated solution pipeline to be communicated with absorber through the second solution heat exchanger, generator also has the refrigerant vapour passage to be communicated with one-level injector injection entrance, the outlet of one-level injector also has the refrigerant vapour passage to be communicated with secondary injector injection entrance, after the outlet of secondary injector also has the refrigerant vapour passage to be communicated with high-temperature generator, high-temperature generator has the cryogen liquid pipeline to be communicated with condenser through the second choke valve, high-temperature generator has the refrigerant vapour passage to be communicated with condenser, condenser has the cryogen liquid pipeline directly with outside, to be communicated with, condenser also has the cryogen liquid pipeline to be communicated with evaporimeter through the first throttle valve, evaporimeter also has the refrigerant vapour passage to be communicated with absorber, absorber and condenser also have respectively the heated medium pipeline to be communicated with outside, evaporimeter and the generator medium pipeline that also has surplus heat respectively is communicated with outside, one-level injector working steam entrance and secondary injector working steam entrance have respectively the refrigerant vapour passage and drive vapor communication, form two-stage injection-Absorption Heat Transformer Characteristics.

Description of drawings

Accompanying drawing is depicted as two-stage injection-Absorption Heat Transformer Characteristics provided by the invention.

In figure, 1-absorber, the 2-the first solution heat exchanger, 3-generator, 4-solution pump, the 5-the second solution heat exchanger, 6-high-temperature generator, 7-condenser, 8-first throttle valve, 9-evaporimeter, 10-one-level injector, 11-secondary injector, the 12-the second choke valve.

The specific embodiment

Two-stage injection-Absorption Heat Transformer Characteristics is achieved in that

on structure, by absorber 1, the first solution heat exchanger 2, generator 3, solution pump 4, the second solution heat exchanger 5, high-temperature generator 6, condenser 7, first throttle valve 8, evaporimeter 9, one-level injector 10, secondary injector 11 and the second choke valve 12 form, absorber 1 has the weak solution pipeline to be communicated with generator 3 through the first solution heat exchanger 2, generator 3 has the solution pipeline through solution pump 4, the first solution heat exchanger 2 and the second solution heat exchanger 5 are communicated with high-temperature generator 6, high-temperature generator 6 also has the concentrated solution pipeline to be communicated with absorber 1 through the second solution heat exchanger 5, generator 3 also has the refrigerant vapour passage to be communicated with one-level injector 10 injection entrances, 10 outlets of one-level injector also have the refrigerant vapour passage to be communicated with secondary injector 11 injection entrances, after 11 outlets of secondary injector also have the refrigerant vapour passage to be communicated with high-temperature generator 6, high-temperature generator 6 has the cryogen liquid pipeline to be communicated with condenser 7 through the second choke valve 12, high-temperature generator 6 has the refrigerant vapour passage to be communicated with condenser 7, condenser 7 has the cryogen liquid pipeline directly with outside, to be communicated with, condenser 7 also has the cryogen liquid pipeline to be communicated with evaporimeter 9 through first throttle valve 8, evaporimeter 9 also has the refrigerant vapour passage to be communicated with absorber 1, absorber 1 and condenser 7 also have respectively the heated medium pipeline to be communicated with outside, evaporimeter 9 and generator 3 medium pipeline that also has surplus heat respectively is communicated with outside, one-level injector 10 working steam entrances and secondary injector 11 working steam entrances have respectively the refrigerant vapour passage and drive vapor communication, form two-stage injection-Absorption Heat Transformer Characteristics.

on technique, the concentrated solution that enters absorber 1 absorbs refrigerant vapour and heat release in heated medium, the weak solution of absorber 1 outlet enters generator 3 after the first solution heat exchanger 2, the waste heat MEDIA FLOW is through generator 3, the solution that heating enters in it discharges and to one-level injector 10 injection entrances, provides refrigerant vapour, the solution of generator 3 is through solution pump 4, the first solution heat exchanger 2 and the second solution heat exchanger 5 enter high-temperature generator 6, enter the driving steam of one-level injector 10, the low pressure refrigerant vapour that injection enters one-level injector 10 from generator 3 becomes the steam of intermediate pressure and temperature, enter the driving steam of secondary injector 11, injection becomes the steam of elevated pressures and temperature from the steam of the intermediate pressure of one-level injector 10 outlet and temperature, this part refrigerant vapour enters high-temperature generator 6 and as it, drives thermal medium, the solution that heating enters high-temperature generator 6 discharges and to condenser 7, provides refrigerant vapour, the cryogen liquid that obtains of flowing through after the refrigerant vapour condensation of high-temperature generator 6 enters condenser 7 through the second choke valve 12, enter the refrigerant medium heat release of condenser 7 forms after heated medium cryogen liquid, a part through the cryogen liquid pipeline discharged to outside, another part enters evaporimeter 9 through first throttle valve 8, the waste heat MEDIA FLOW is through evaporimeter 9, the cryogen liquid that heating enters in it becomes refrigerant vapour to provide to absorber 1, form two-stage injection-Absorption Heat Transformer Characteristics.

The effect that the technology of the present invention can realize---Two-stage injection-Absorption Heat Transformer Characteristics proposed by the invention has following effect and advantage:

1. save the condenser in traditional thermal converter, broken away from the dependence of thermal converter to cooling system, greatly expanded the scope of application of thermal converter.

2. realize the efficient utilization to more high-grade driving steam, the lower temperature refrigerant vapour of generator exports becomes more high-grade refrigerant vapour with the driving thermal medium as high-temperature generator through the two-stage injection, utilized on the one hand the thermic load of more low-grade driving thermal medium, reduce on the other hand the thermic load that drives steam, from two aspects, improved heat utilization rate.

3. the technique of two-stage injection,, than single-stage injection, reduced the compression ratio of every one-level on the one hand, optimized the operating efficiency of injector, also can reduce simultaneously the requirement that drives steam grade or reduce temperature requirement to the waste heat medium.

4. can reclaim the heat of low temperature liquid thermal source, solve steam jet heat pump and can not directly not utilize the problem of low temperature liquid thermal source.

In sum, the present invention is with simple structure, saved the essential but condensation link of deeply being kept in check of traditional thermal converter, give full play to the value of high-quality driving steam, the method of two-stage injection, not only optimized the operating efficiency of injector, also reduced the requirement that drives steam grade or reduced temperature requirement to the waste heat medium, abundant, the deep exploitation of realization to waste heat, has very high energy-saving efficiency, make up the deficiency of thermal converter and steam jet heat pump, expanded the range of application of thermal converter technology in energy-saving field.

Claims

1. two-stage injection-Absorption Heat Transformer Characteristics, by absorber, the first solution heat exchanger, generator, solution pump, the second solution heat exchanger, high-temperature generator, condenser, the first throttle valve, evaporimeter, the one-level injector, secondary injector and the second choke valve form, absorber has the weak solution pipeline to be communicated with generator through the first solution heat exchanger, generator has the solution pipeline through solution pump, the first solution heat exchanger and the second solution heat exchanger are communicated with high-temperature generator, high-temperature generator also has the concentrated solution pipeline to be communicated with absorber through the second solution heat exchanger, generator also has the refrigerant vapour passage to be communicated with one-level injector injection entrance, the outlet of one-level injector also has the refrigerant vapour passage to be communicated with secondary injector injection entrance, after the outlet of secondary injector also has the refrigerant vapour passage to be communicated with high-temperature generator, high-temperature generator has the cryogen liquid pipeline to be communicated with condenser through the second choke valve, high-temperature generator has the refrigerant vapour passage to be communicated with condenser, condenser has the cryogen liquid pipeline directly with outside, to be communicated with, condenser also has the cryogen liquid pipeline to be communicated with evaporimeter through the first throttle valve, evaporimeter also has the refrigerant vapour passage to be communicated with absorber, absorber and condenser also have respectively the heated medium pipeline to be communicated with outside, evaporimeter and the generator medium pipeline that also has surplus heat respectively is communicated with outside, one-level injector working steam entrance and secondary injector working steam entrance have respectively the refrigerant vapour passage and drive vapor communication, form two-stage injection-Absorption Heat Transformer Characteristics.