CN210425621U - Absorption type combined refrigerating system - Google Patents

Absorption type combined refrigerating system Download PDF

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Publication number
CN210425621U
CN210425621U CN201921002089.XU CN201921002089U CN210425621U CN 210425621 U CN210425621 U CN 210425621U CN 201921002089 U CN201921002089 U CN 201921002089U CN 210425621 U CN210425621 U CN 210425621U
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ammonia
preheater
inlet
outlet
absorption
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张振涛
张钰
杨俊玲
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Technical Institute of Physics and Chemistry of CAS
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Technical Institute of Physics and Chemistry of CAS
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    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/62—Absorption based systems

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Abstract

The utility model relates to the field of absorption refrigeration, and provides an absorption combined refrigeration system, which comprises a heat pump subsystem and an ammonia absorption refrigeration subsystem; the heat pump subsystem includes: a vapor injection pump and a vapor compressor connected to each other; the ammonia absorption refrigeration subsystem comprises a preheater, a pervaporation membrane module, an absorption tower, a subcooler and an evaporator which are connected in sequence; an ammonia water outlet of the pervaporation membrane module is connected with an ammonia water inlet of the absorption tower, an ammonia steam outlet of the pervaporation membrane module is connected with a steam jet pump, and an inlet of the pervaporation membrane module is connected with a first outlet of the preheater; the ammonia inlet of the absorption tower is connected with the subcooler, the outlet of the absorption tower is connected with the first inlet of the preheater, the second inlet of the preheater is connected with the vapor compressor, and the second outlet of the preheater is connected with the subcooler. This application replaces generator and distiller through setting up pervaporation membrane module to cooperation heat pump subsystem makes this system can utilize low temperature waste heat cooperation low concentration aqueous ammonia to accomplish the refrigeration.

Description

Absorption type combined refrigerating system
Technical Field
The utility model relates to an absorption refrigeration field, in particular to absorption combination refrigerating system.
Background
The absorption refrigeration uses naturally existing water or ammonia and the like as a refrigerant, and is harmless to the environment and the atmospheric ozone layer; the heat energy is used as driving energy, the heat energy generated by boiler steam and fuel can be utilized, low-grade heat energy such as waste heat, solar energy and the like can be utilized, and the dual purposes of refrigeration and heating can be realized in the same unit.
At present, the absorption refrigeration is being developed toward miniaturization and high efficiency. However, the existing absorption refrigeration device has the defects that the device structure is complex, the low-temperature waste heat is difficult to directly utilize, especially in the refrigeration process by utilizing low-concentration ammonia water, the energy efficiency of the whole system is low, and the direct utilization in the actual production process is difficult.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In view of the technical defects and application requirements, the application provides an absorption type combined refrigeration system, and aims to utilize low-temperature waste heat to cooperate with low-concentration ammonia water to finish refrigeration.
(II) technical scheme
In order to solve the above problem, the utility model provides an absorption formula combination refrigerating system, include: a heat pump subsystem and an ammonia absorption refrigeration subsystem; the heat pump subsystem includes: a vapor injection pump and a vapor compressor connected to each other; the ammonia absorption refrigeration subsystem includes: the system comprises a preheater, a pervaporation membrane assembly, an absorption tower, a subcooler and an evaporator which are connected in sequence; an ammonia water outlet of the pervaporation membrane module is connected with an ammonia water inlet of the absorption tower, an ammonia steam outlet of the pervaporation membrane module is connected with the steam jet pump, and an inlet of the pervaporation membrane module is connected with a first outlet of the preheater; the ammonia inlet of the absorption tower is connected with the subcooler, the outlet of the absorption tower is connected with the first inlet of the preheater, the second inlet of the preheater is connected with the vapor compressor, and the second outlet of the preheater is connected with the subcooler.
Furthermore, the number of the preheaters and the pervaporation membrane assemblies is multiple, and each pervaporation membrane assembly is provided with the corresponding preheater; an ammonia water outlet of the pervaporation membrane component of the previous effect is connected with a first inlet of the preheater corresponding to the next effect; and an ammonia steam outlet of the pervaporation membrane module of the latter effect is connected with a second inlet of the preheater corresponding to the former effect.
Further, second outlets of the preheaters are sequentially connected, and the second outlets of the preheaters are connected with the subcooler.
Further, the ammonia absorption refrigeration subsystem further comprises: a condensing pipeline; the condensing pipeline is connected to the plurality of preheaters in parallel, and the condensing pipeline connects the plurality of preheaters.
Further, the ammonia absorption refrigeration subsystem further comprises: a condensate gas preheater; the condensing pipeline is connected to the condensing gas preheater and the plurality of preheaters in parallel, and the condensing pipeline connects the condensing gas preheater with the preheaters; the condensate gas preheater is arranged on a pipeline between the absorption tower and the preheater corresponding to the first effect; a first outlet of the condensate gas preheater is connected with the preheater corresponding to the first effect; and a second outlet of the condensate gas preheater is connected with a second outlet of each preheater.
Further, the ammonia absorption refrigeration subsystem further comprises: a first throttle valve and a second throttle valve; the first throttling valve is arranged on a pipeline between the absorption tower and the pervaporation membrane module; the second throttle valve is arranged on a pipeline between the evaporator and the subcooler.
Furthermore, a first inlet of the subcooler is connected with a second outlet of the preheater, a first outlet of the subcooler is connected with an inlet of the evaporator through the second throttling valve, a second inlet of the subcooler is connected with an outlet of the evaporator, and a second outlet of the subcooler is connected with an ammonia inlet of the absorption tower.
Further, the ammonia absorption refrigeration subsystem further comprises: a liquid ammonia pump; the liquid ammonia pump is arranged on a pipeline between the preheater and the subcooler.
Further, the steam jet pump is provided with a first steam inlet and a second steam inlet; and an ammonia vapor outlet of the pervaporation membrane module is connected with the first vapor inlet, and the second vapor inlet is connected with an external heat source.
Further, the ammonia absorption refrigeration subsystem further comprises: ammonia pumps and condensate pumps; the ammonia water pump is arranged on a pipeline between the pervaporation membrane module and the absorption tower; the condensed water pump is arranged on a pipeline between the absorption tower and the preheater.
(III) advantageous effects
The utility model provides an absorption formula combination refrigerating system replaces generator and distiller among the traditional device through setting up the pervaporation membrane subassembly in heat pump subsystem to the cooperation sets up heat pump subsystem, makes this absorption formula combination refrigerating system can utilize the low temperature heat source to handle low concentration aqueous ammonia and accomplish entire system's refrigeration cycle, and it can promote the system efficiency by a wide margin than prior art.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an absorption type combined refrigeration system provided by an embodiment of the present invention;
wherein, 1, a preheater; 2. a pervaporation membrane module; 3. a subcooler; 4. an evaporator; 5. an absorption tower; 6. a steam jet pump; 7. a vapor compressor; 8. a first throttle valve; 9. a second throttle valve; 10. a condensate gas preheater; 11. an ammonia pump; 12. a liquid ammonia pump; 13. a condensate pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
An embodiment of the utility model provides an absorption formula combination refrigerating system, as shown in fig. 1, include: a heat pump subsystem and an ammonia absorption refrigeration subsystem; the heat pump subsystem includes: a vapor jet pump 6 and a vapor compressor 7 connected to each other; the ammonia absorption refrigeration subsystem includes: the device comprises a preheater 1, a pervaporation membrane module 2, an absorption tower 5, a subcooler 3 and an evaporator 4 which are connected in sequence; wherein, an ammonia water outlet of the pervaporation membrane module 2 is connected with an ammonia water inlet of the absorption tower 5, an ammonia steam outlet of the pervaporation membrane module 2 is connected with the steam jet pump 6, and an inlet of the pervaporation membrane module 2 is connected with a first outlet of the preheater 1; an ammonia inlet of the absorption tower 5 is connected with the subcooler 3, an outlet of the absorption tower 5 is connected with a first inlet of the preheater 1, a second inlet of the preheater 1 is connected with the steam compressor 7, and a second outlet of the preheater 1 is connected with the subcooler 3.
In this embodiment, the ammonia absorption refrigeration subsystem further includes: a first throttle 8 and a second throttle 9. The first throttle valve 8 is provided on the piping between the absorption column 5 and the pervaporation membrane module 2. A second throttle valve 9 is provided on the line between the evaporator 4 and the subcooler 3.
Wherein, the first inlet of subcooler 3 is connected with the second exit of preheater 1, and the first export of subcooler 3 passes through second choke valve 9 and 4 entry connections of evaporimeter, and the second inlet of subcooler 3 and 4 exit connections of evaporimeter, and the second export of subcooler 3 is connected with the ammonia entry of absorption tower 5.
In the working process of the absorption type combined refrigeration system, an ammonia water solution enters the preheater 1 for preheating, enters the pervaporation membrane module 2 after being preheated, enters the first throttling valve 8 for reducing the pressure after being diluted by the pervaporation membrane module 2, and then enters the absorption tower 5 as an absorbent for absorbing ammonia vapor. The liquid ammonia concentrated by the pervaporation membrane module 2 enters the subcooler 3 through the preheater 1, enters the second throttling valve 9 after being cooled in the subcooler 3, is reduced in pressure and then enters the evaporator 4, is vaporized by the heat of a cooling medium after being absorbed by the liquid ammonia in the evaporator 4 to form wet steam or saturated steam, even superheated steam, is discharged from the evaporator 4 to enter the liquid ammonia in the subcooler 3 for heat exchange, and is introduced into the absorption tower 5 to be absorbed by an absorbent after the heat exchange.
On the other hand, the steam jet pump 6 is provided with a first steam inlet and a second steam inlet. An ammonia vapor outlet of the pervaporation membrane module 2 is connected with a first vapor inlet, and a second vapor inlet is connected with an external heat source. The vapor at the permeation side and the power vapor are sucked into the vapor jet pump 6 together for first enthalpy-increasing compression, the compressed vapor is introduced into the vapor compressor 7 for second enthalpy-increasing compression, and the compressed vapor is sent into the preheater 1 for heat exchange.
The embodiment of the utility model provides an absorption formula combination refrigerating system replaces generator and distiller among the traditional device through setting up the pervaporation membrane subassembly in heat pump subsystem to the cooperation sets up heat pump subsystem, makes this absorption formula combination refrigerating system can utilize the low temperature heat source to handle low concentration aqueous ammonia and accomplish entire system's refrigeration cycle, and it can promote the system efficiency by a wide margin than prior art.
In order to improve the refrigeration efficiency of the whole structure, in an embodiment of the present invention, as shown in fig. 1, the pervaporation membrane module 2 can be a single effect, a double effect or a multiple effect, that is, the preheater 1 and the pervaporation membrane module 2 are both multiple, and each pervaporation membrane module 2 is provided with the preheater 1 corresponding thereto. An ammonia water outlet of the pervaporation membrane component 2 of the previous effect is connected with a first inlet of the preheater 1 corresponding to the next effect. The ammonia vapor outlet of the pervaporation membrane module 2 of the latter effect is connected with the second inlet of the preheater 1 corresponding to the former effect. The vapor at the permeation side of the latter effect is used as a heat source of the former effect and preheats the ammonia solution entering the pervaporation membrane module 2.
Wherein, the second outlet of each preheater 1 is connected in turn, and the second outlet of each preheater 1 is connected with the subcooler 3.
In the working process of each pervaporation membrane assembly 2, the pervaporation membrane assembly 2 with one effect and power steam are sucked into a steam jet pump 6 together for carrying out first enthalpy-increasing compression, the compressed steam is introduced into a steam compressor 7 for carrying out second enthalpy-increasing compression, the number of times of enthalpy-increasing compression can be determined according to the actual first effect and last effect temperatures, and finally the enthalpy-increasing steam is used as a heat source of the pervaporation membrane assembly 2 with the last effect and exchanges heat with a feed solution with the last effect in a preheater 1. Under the actual working condition, the pervaporation membrane component 2 can be adjusted to be one-effect, two-effect or multiple-effect according to the concentration of ammonia water. If the concentration of the ammonia water is higher, one effect can be selected, and if the concentration of the ammonia water is lower, two effects or even multiple effects can be selected.
Based on the above embodiments, in a preferred embodiment, in order to avoid the influence of the condensed steam on the system circulation, the ammonia absorption refrigeration subsystem may further include a condensed steam pipeline. The condensing pipeline connects in parallel on a plurality of preheaters 1, and the condensing pipeline connects a plurality of preheaters 1.
For further processing the condensed steam, the ammonia absorption refrigeration subsystem further comprises: a condensate gas preheater 10. The condensing pipeline is connected in parallel to the condensing gas preheater 10 and the plurality of preheaters 1, and the condensing pipeline connects the condensing gas preheater 10 with the preheaters 1. The condensate gas preheater 10 is arranged on the pipeline between the absorption tower 5 and the first effect corresponding preheater 1. The first outlet of the condensate gas preheater 10 is connected to the first preheater 1. The second outlet of the condensate gas preheater 10 is connected to the second outlet of each preheater 1.
In an embodiment according to the present invention, as shown in fig. 1, the ammonia absorption refrigeration subsystem further comprises: a liquid ammonia pump 12. A liquid ammonia pump 12 is provided on the line between the preheater 1 and the subcooler 3 to deliver liquid ammonia into the subcooler 3.
In addition, the ammonia absorption refrigeration subsystem further comprises: an ammonia pump 11 and a condensate pump 13. The ammonia pump 11 is arranged on a pipeline between the pervaporation membrane module 2 and the absorption tower 5. A condensate pump 13 is provided on the piping between the absorption tower 5 and the preheater 1.
In the working process of the absorption type combined refrigeration system provided by the embodiment, an ammonia water solution enters the preheater 1 through the condensate pump 13 for preheating, enters the pervaporation membrane module 2 after preheating, enters the first throttling valve 8 through the ammonia pump 11 for reducing the pressure through the pervaporation membrane module 2, and then enters the absorption tower 5 as an absorbent for absorbing ammonia vapor. The liquid ammonia concentrated by the pervaporation membrane module 2 enters the subcooler 3 through the preheater 1 and the liquid ammonia pump 12, after being cooled in the subcooler 3, the liquid ammonia enters the second throttling valve 9 to reduce the pressure and then enters the evaporator 4, the liquid ammonia in the evaporator 4 is absorbed and vaporized by the heat of the cooling medium to form wet steam or saturated steam, even superheated steam, and the wet steam or saturated steam is discharged from the evaporator 4 to enter the liquid ammonia in the subcooler 3 for heat exchange, and is introduced into the absorption tower 5 to be absorbed by the absorbent after the heat exchange. The vapor at the permeation side and the power vapor are sucked into the vapor jet pump 6 together to carry out first enthalpy increasing compression, the compressed vapor is introduced into the vapor compressor 7 to carry out second enthalpy increasing compression, the compressed vapor is sent into the preheater 1 to carry out heat exchange, and the absorption refrigeration cycle can be completed by arranging a corresponding heat exchange structure near the evaporator 4.
To sum up, the embodiment of the utility model provides an absorption formula combination refrigerating system replaces generator and distiller among the traditional device through set up pervaporation membrane subassembly in heat pump subsystem to the cooperation sets up heat pump subsystem, makes this absorption formula combination refrigerating system can utilize the low temperature heat source to handle the refrigeration cycle that low concentration aqueous ammonia accomplished entire system, and it can promote the system efficiency by a wide margin than prior art.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (10)

1. An absorption type combined refrigeration system, comprising:
a heat pump subsystem and an ammonia absorption refrigeration subsystem;
the heat pump subsystem includes: a vapor injection pump and a vapor compressor connected to each other;
the ammonia absorption refrigeration subsystem includes: the system comprises a preheater, a pervaporation membrane assembly, an absorption tower, a subcooler and an evaporator which are connected in sequence;
an ammonia water outlet of the pervaporation membrane module is connected with an ammonia water inlet of the absorption tower, an ammonia steam outlet of the pervaporation membrane module is connected with the steam jet pump, and an inlet of the pervaporation membrane module is connected with a first outlet of the preheater; the ammonia inlet of the absorption tower is connected with the subcooler, the outlet of the absorption tower is connected with the first inlet of the preheater, the second inlet of the preheater is connected with the vapor compressor, and the second outlet of the preheater is connected with the subcooler.
2. The absorption type combined refrigeration system according to claim 1, wherein the number of the pre-heater and the pervaporation membrane module is multiple, and each pervaporation membrane module is provided with the pre-heater corresponding to the pervaporation membrane module; an ammonia water outlet of the pervaporation membrane component of the previous effect is connected with a first inlet of the preheater corresponding to the next effect; and an ammonia steam outlet of the pervaporation membrane module of the latter effect is connected with a second inlet of the preheater corresponding to the former effect.
3. The absorption-type combination refrigeration system according to claim 2, wherein the second outlets of the preheaters are connected in series, and the second outlets of the preheaters are connected to the subcooler.
4. The absorption chiller system of claim 3 wherein the ammonia absorption chiller subsystem further comprises: a condensing pipeline; the condensing pipeline is connected to the plurality of preheaters in parallel, and the condensing pipeline connects the plurality of preheaters.
5. The absorption chiller system of claim 4 wherein the ammonia absorption chiller subsystem further comprises: a condensate gas preheater; the condensing pipeline is connected to the condensing gas preheater and the plurality of preheaters in parallel, and the condensing pipeline connects the condensing gas preheater with the preheaters;
the condensate gas preheater is arranged on a pipeline between the absorption tower and the preheater corresponding to the first effect; a first outlet of the condensate gas preheater is connected with the preheater corresponding to the first effect; and a second outlet of the condensate gas preheater is connected with a second outlet of each preheater.
6. The absorption chiller system of claim 1 wherein the ammonia absorption chiller subsystem further comprises: a first throttle valve and a second throttle valve; the first throttling valve is arranged on a pipeline between the absorption tower and the pervaporation membrane module; the second throttle valve is arranged on a pipeline between the evaporator and the subcooler.
7. The absorption chiller according to claim 6 wherein the first inlet of the subcooler is connected to the second outlet of the preheater, the first outlet of the subcooler is connected to the evaporator inlet through the second throttling valve, the second inlet of the subcooler is connected to the evaporator outlet, and the second outlet of the subcooler is connected to the ammonia inlet of the absorber.
8. The absorption chiller system of claim 1 wherein the ammonia absorption chiller subsystem further comprises: a liquid ammonia pump; the liquid ammonia pump is arranged on a pipeline between the preheater and the subcooler.
9. The absorption chiller system of claim 1 wherein the vapor jet pump is provided with a first vapor inlet and a second vapor inlet; and an ammonia vapor outlet of the pervaporation membrane module is connected with the first vapor inlet, and the second vapor inlet is connected with an external heat source.
10. The absorption chiller system of claim 1 wherein the ammonia absorption chiller subsystem further comprises: ammonia pumps and condensate pumps; the ammonia water pump is arranged on a pipeline between the pervaporation membrane module and the absorption tower; the condensed water pump is arranged on a pipeline between the absorption tower and the preheater.
CN201921002089.XU 2019-06-28 2019-06-28 Absorption type combined refrigerating system Active CN210425621U (en)

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CN201921002089.XU CN210425621U (en) 2019-06-28 2019-06-28 Absorption type combined refrigerating system

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Application Number Priority Date Filing Date Title
CN201921002089.XU CN210425621U (en) 2019-06-28 2019-06-28 Absorption type combined refrigerating system

Publications (1)

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CN210425621U true CN210425621U (en) 2020-04-28

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