CN218672688U - Single-effect two-stage composite lithium bromide absorption refrigerating unit with afterburning - Google Patents
Single-effect two-stage composite lithium bromide absorption refrigerating unit with afterburning Download PDFInfo
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- CN218672688U CN218672688U CN202223099497.6U CN202223099497U CN218672688U CN 218672688 U CN218672688 U CN 218672688U CN 202223099497 U CN202223099497 U CN 202223099497U CN 218672688 U CN218672688 U CN 218672688U
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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
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Abstract
The utility model relates to a single-action two-stage composite lithium bromide absorption refrigerating unit with afterburning, which belongs to the technical field of air conditioning equipment. Comprises an evaporator, an absorber, a single-effect generator, a single-effect condenser, a secondary low-pressure generator, a secondary absorber, a secondary high-pressure generator, a secondary high-pressure condenser and a afterburning generator. The unit can drive the single-effect and two-stage composite refrigeration of the heat source driving unit by utilizing the waste heat, simultaneously or independently, and can ensure that the unit provides stable refrigeration output when the waste heat drives the heat source to be insufficient or not.
Description
Technical Field
The utility model relates to a single-effect two-stage composite lithium bromide absorption refrigerating unit with afterburning. Belongs to the technical field of air conditioning equipment.
Background
An existing single-effect two-stage composite lithium bromide absorption refrigeration unit (hereinafter referred to as a composite unit or unit) is shown in fig. 1, and the unit is composed of a single-effect generator 1, a single-effect condenser 2, a second-stage high-pressure generator 3, a second-stage high-pressure condenser 4, a single-effect high-temperature heat exchanger 5, a second-stage heat exchanger 6, a second-stage absorber 7, a second-stage low-pressure generator 8, an absorber 9, an evaporator 10, a single-effect low-temperature heat exchanger 11, a second-stage solution pump 12, a first-stage solution pump 13, a single-effect solution pump 14, a refrigerant pump 15, a control system, pipelines and valves for connecting various components. The single-effect generator 1 and the single-effect condenser 2 are positioned in a cavity, the secondary high-pressure generator 3 and the secondary high-pressure condenser 4 are positioned in a cavity, the secondary low-pressure generator 8 and the secondary absorber 7 are positioned in a cavity and are respectively provided with a primary solution pump 13 and a secondary solution pump 12, and the evaporator 10 and the absorber 9 are positioned in a cavity and are respectively provided with a refrigerant pump 15 and a single-effect solution pump 14. The cold water flows through the evaporator 10 to be cooled; the cooling water is divided into three paths which are connected in parallel, wherein one path flows through an absorber 9, the other path flows through a secondary absorber 7, and the other path flows through a single-effect condenser 2 and a secondary high-pressure condenser 4 in series; the driving heat source is connected in series and flows through the single-effect generator 1, the secondary low-voltage generator 8 and the secondary high-voltage generator 3, and the heat is released to drive the whole unit to operate. When the unit is operated, the refrigerant water sprayed from the top of the evaporator 10 after being pumped by the refrigerant pump 15 exchanges heat with cold water flowing through the heat transfer tubes of the evaporator 10 to reduce the temperature of the refrigerant water, the refrigerant water is vaporized into refrigerant steam and then enters the absorber 9 to be absorbed by the primary lithium bromide solution, and the released heat is taken away by the cooling water flowing through the heat transfer tubes; after the concentration of the first-stage lithium bromide solution in the absorber 9 becomes dilute, the first-stage lithium bromide solution is pumped out by a single-effect solution pump 14, and enters the single-effect generator 1 after heat exchange and temperature rise through the single-effect low-temperature heat exchanger 11 and the single-effect high-temperature heat exchanger 5. The first-stage lithium bromide dilute solution is heated and concentrated by a driving heat source in the single-effect generator 1, the concentrated refrigerant steam enters the single-effect condenser 2, is cooled and condensed by cooling water, and the condensed refrigerant water returns to the evaporator 10; the concentrated primary lithium bromide concentrated solution enters a secondary low-pressure generator 8 after being subjected to heat exchange and temperature reduction through a single-effect high-temperature heat exchanger 5. The primary lithium bromide solution is heated and concentrated again by the driving heat source in the secondary generator 8, the concentrated refrigerant steam enters the secondary absorber 7 and is absorbed by the secondary solution (the released heat is taken away by cooling water flowing through the heat transfer pipe), the concentrated solution is pumped out by the primary solution pump 13, and the concentrated solution returns to the absorber 9 to absorb the refrigerant steam generated in the evaporator 10 again after heat exchange and temperature reduction by the single-effect low-temperature heat exchanger 11. The concentration of the secondary solution in the secondary absorber 7 is diluted after absorbing the refrigerant steam generated by the concentration of the primary solution in the secondary low-pressure generator 8, the diluted refrigerant steam is pumped out by the secondary solution pump 12, the refrigerant steam enters the secondary high-pressure generator 3 after being subjected to heat exchange and temperature rise by the secondary heat exchanger 6 and is heated and concentrated by the driving heat source, the concentrated refrigerant steam enters the secondary high-pressure condenser 4 and returns to the evaporator 10 after being cooled and condensed by cooling water, and the concentrated secondary solution returns to the secondary absorber 7 again after being subjected to heat exchange and temperature drop by the secondary heat exchanger 6 and continuously absorbs the refrigerant steam.
In the compound type unit, the driving heat source firstly releases heat in the single-effect generator 1 to drive the unit to perform single-effect refrigeration (the refrigeration COP is higher), and then the driving heat source enters the second-stage low-pressure generator 8 and the second-stage high-pressure generator 3 to release heat to drive the unit to perform two-stage absorption and two-stage refrigeration (the refrigeration COP is lower). Although the COP of the two-stage absorption and two-stage generation refrigeration cycle is low, the COP can utilize the outlet temperature of the driving heat source to be lower, so that the heat of the driving heat source can be fully utilized for refrigeration, and the method has a good application prospect in the field of industrial waste heat utilization. On the other hand, the industrial waste heat is influenced by industrial production, so that the refrigerating output of the unit is unstable when a waste heat source is unstable, and even if a standby machine is equipped, the problems of fluctuation of cold water flow distribution and load regulation exist, and the like, so that the industrial waste heat is influenced to a certain extent. If other heat sources can be introduced into the composite type unit to supplement combustion driving, the output stability of the unit can be ensured when the residual heat source is unstable, and the output of the unit can be ensured even when the residual heat source is not available, the problem can be well solved.
Disclosure of Invention
The utility model aims at providing a take compound lithium bromide absorption refrigeration unit of single-effect two-stage of afterburning, this unit can introduce the afterburning heat source all the way and supply the drive unit operation when waste heat drive heat source is unstable, can realize the seamless connection of afterburning heat source and waste heat drive heat source, ensures that the unit is exerted oneself stably.
The purpose of the utility model is realized like this: a single-effect two-stage composite lithium bromide absorption refrigerating unit (composite unit with afterburning for short) with afterburning comprises: the system comprises a single-effect generator, a single-effect condenser, a second-stage high-pressure generator, a second-stage high-pressure condenser, a single-effect high-temperature heat exchanger, a single-effect low-temperature heat exchanger, a second-stage low-pressure generator, a second-stage absorber, an evaporator, an absorber, a single-effect solution pump, a first-stage solution pump, a second-stage solution pump, a refrigerant pump, a post-combustion solution pump, a post-combustion generator and a post-combustion heat exchanger, wherein the post-combustion solution pump, the post-combustion generator and the post-combustion heat exchanger are additionally arranged on a conventional single-effect two-stage composite unit. The added after-combustion solution pump connects the absorber, the after-combustion heat exchanger and the after-combustion generator to form a solution circulation, the after-combustion generator is communicated with the secondary high-pressure condenser, the after-combustion heat source flows through the after-combustion generator, when the driving heat source can not meet the refrigerating requirement of the unit, the added after-combustion solution pump pumps the lithium bromide dilute solution in the absorber, the lithium bromide dilute solution is sent into the after-combustion generator through the after-combustion heat exchanger to be heated and concentrated by the after-combustion heat source, the concentrated refrigerant steam enters the secondary high-pressure condenser and then enters the evaporator, and the concentrated lithium bromide concentrated solution returns to the absorber through the after-combustion heat exchanger.
Furthermore, the added afterburning generator can be divided into an afterburning high-pressure generator and an afterburning low-pressure generator, and the afterburning heat exchanger can be divided into an afterburning low-temperature heat exchanger and an afterburning high-temperature heat exchanger. The lithium bromide dilute solution in the absorber is pumped out by the afterburning solution pump, and is sent into the afterburning high-pressure generator through the afterburning low-temperature heat exchanger and the afterburning high-temperature heat exchanger to be heated and concentrated by an afterburning heat source, the concentrated lithium bromide solution enters the afterburning low-pressure generator through the afterburning high-temperature heat exchanger, the concentrated high-temperature refrigerant steam enters a heat transfer pipe of the afterburning low-pressure generator to be used as a heat source to heat and concentrate the lithium bromide solution again, the heat released by the lithium bromide solution is condensed and then enters a secondary high-pressure condenser, the refrigerant steam generated by the re-concentration of the lithium bromide solution also enters the secondary high-pressure condenser, and the re-concentrated lithium bromide solution returns to the absorber through the afterburning low-temperature heat exchanger.
The lithium bromide solution pumped out by the afterburning solution pump of the unit is concentrated by firstly flowing through the afterburning high-pressure generator and then flowing through the afterburning low-pressure generator in series, or by firstly flowing through the afterburning low-pressure generator and then flowing through the afterburning high-pressure generator in series, or by flowing through the afterburning high-pressure generator and the afterburning low-pressure generator in parallel.
The afterburning generator added in the unit is communicated with the secondary high-pressure condenser, the refrigerant steam generated by the concentration of the lithium bromide solution enters the secondary high-pressure condenser, or the afterburning generator is communicated with the single-effect condenser, and the refrigerant steam generated by the concentration of the lithium bromide solution enters the single-effect condenser.
The utility model has the advantages that:
compare with current single-effect two-stage composite unit, the utility model discloses an increase afterburning solution pump, afterburning heat exchanger and afterburning generator, can be on current single-effect two-stage refrigeration cycle's basis, parallelly connected the solution circulation that has increased all the way absorber, afterburning heat exchanger and afterburning generator, when waste heat drive heat source is not enough, unit refrigerating capacity is not enough, the start changes the solution circulation, can supply the unit through the afterburning heat source and exert oneself, realizes the stability that the unit exerted oneself.
Drawings
Fig. 1 is a schematic diagram of the operation of a conventional single-effect two-stage composite lithium bromide absorption refrigerating unit.
Fig. 2 is a working principle diagram of an example 1 of the single-effect two-stage composite lithium bromide absorption refrigerating unit with afterburning of the utility model.
Fig. 3 is a working principle diagram of example 2 of the present invention.
Reference numbers in the figures:
the system comprises a single-effect generator 1, a single-effect condenser 2, a secondary high-pressure generator 3, a secondary high-pressure condenser 4, a single-effect high-temperature heat exchanger 5, a secondary heat exchanger 6, a secondary absorber 7, a secondary low-pressure generator 8, an absorber 9, an evaporator 10, a single-effect low-temperature heat exchanger 11, a secondary solution pump 12, a primary solution pump 13, a single-effect solution pump 14, a refrigerant pump 15, a afterburning solution pump 16, an afterburning generator 17, an afterburning high-pressure generator 17-1, an afterburning low-pressure generator 17-2, an afterburning heat exchanger 18, an afterburning low-temperature heat exchanger 18-1 and an afterburning high-temperature heat exchanger 18-2
Cold water enters the water inlet A1, cold water exits the water inlet A2, cooling water enters the water inlet B1, cooling water exits the water inlet B2, a heat source is driven to enter the water inlet C1, a heat source is driven to exit the water inlet C2, a supplementary combustion heat source enters the water inlet D1, and a supplementary combustion heat source exits the water inlet D2.
Detailed Description
For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings.
Example 1
Referring to fig. 2, the utility model relates to a single-effect two-stage compound lithium bromide absorption refrigeration unit with afterburning, this unit comprises single-effect generator 1, single-effect condenser 2, second grade high pressure generator 3, second grade high pressure condenser 4, single-effect high temperature heat exchanger 5, second grade heat exchanger 6, second grade absorber 7, second grade low pressure generator 8, absorber 9, evaporimeter 10, single-effect low temperature heat exchanger 11, second grade solution pump 12, one-level solution pump 13, single-effect solution pump 14, cryogen pump 15, afterburning solution pump 16, afterburning generator 17, afterburning heat exchanger 18, and control system and the pipeline, the valve etc. of connecting each part. The single-effect generator 1 and the single-effect condenser 2 are positioned in a cavity, the secondary high-pressure generator 3 and the secondary high-pressure condenser 4 are positioned in a cavity, the secondary low-pressure generator 8 and the secondary absorber 7 are positioned in a cavity and are respectively provided with a primary solution pump 13 and a secondary solution pump 12, the evaporator 10 and the absorber 9 are positioned in a cavity and are respectively provided with a refrigerant pump 15, a single-effect solution pump 14 and a afterburning solution pump 16, and the afterburning generator 17 is communicated with the secondary high-pressure condenser 4. The cold water flows through the evaporator 10 to be cooled; the cooling water is divided into three paths which are connected in parallel, one path flows through an absorber 9, the other path flows through a two-stage absorber 7, and the other path flows through a single-effect condenser 2 and a two-stage high-pressure condenser 4 in series; a driving heat source is connected in series and flows through the single-effect generator 1, the secondary low-pressure generator 8 and the secondary high-pressure generator 3, and heat is released to drive the whole unit to operate in a single-effect and two-stage combined mode; the afterburning heat source flows through the afterburning generator 17 to drive the whole unit to operate after burning. When the unit is operated, the refrigerant water sprayed from the top of the evaporator 10 after being pumped by the refrigerant pump 15 exchanges heat with cold water flowing through the heat transfer tubes of the evaporator 10 to reduce the temperature of the refrigerant water, the refrigerant water is vaporized into refrigerant steam and then enters the absorber 9 to be absorbed by the primary lithium bromide solution, and the released heat is taken away by the cooling water flowing through the heat transfer tubes; after the concentration of the first-stage lithium bromide solution in the absorber 9 becomes dilute, the first-stage lithium bromide solution is pumped out by a single-effect solution pump 14, and enters the single-effect generator 1 after heat exchange and temperature rise through the single-effect low-temperature heat exchanger 11 and the single-effect high-temperature heat exchanger 5. The first-stage lithium bromide dilute solution is heated and concentrated by a driving heat source in the single-effect generator 1, the concentrated refrigerant steam enters the single-effect condenser 2, is cooled and condensed by cooling water, and the condensed refrigerant water returns to the evaporator 10; the concentrated primary lithium bromide concentrated solution enters a secondary low-pressure generator 8 after being subjected to heat exchange and temperature reduction through a single-effect high-temperature heat exchanger 5. The primary lithium bromide solution is heated and concentrated again by the driving heat source in the secondary generator 8, the concentrated refrigerant steam enters the secondary absorber 7 and is absorbed by the secondary solution (the released heat is taken away by cooling water flowing through the heat transfer pipe), the concentrated solution is pumped out by the primary solution pump 13, and the concentrated solution returns to the absorber 9 to absorb the refrigerant steam generated in the evaporator 10 again after heat exchange and temperature reduction by the single-effect low-temperature heat exchanger 11. The concentration of the secondary solution in the secondary absorber 7 is diluted after absorbing the refrigerant steam generated by the concentration of the primary solution in the secondary low-pressure generator 8, the diluted refrigerant steam is pumped out by the secondary solution pump 12, the refrigerant steam enters the secondary high-pressure generator 3 after being subjected to heat exchange and temperature rise by the secondary heat exchanger 6 and is heated and concentrated by the driving heat source, the concentrated refrigerant steam enters the secondary high-pressure condenser 4 and returns to the evaporator 10 after being cooled and condensed by cooling water, and the concentrated secondary solution returns to the secondary absorber 7 again after being subjected to heat exchange and temperature drop by the secondary heat exchanger 6 and continuously absorbs the refrigerant steam. While or independently operating the single-effect and two-stage refrigeration cycle, the lithium bromide dilute solution in the absorber 9 is pumped out by the post-combustion solution pump 16, is sent into the post-combustion generator 17 after heat exchange and temperature rise by the post-combustion heat exchanger 18 to be heated and concentrated by the post-combustion heat source, the concentrated refrigerant steam enters the secondary high-pressure condenser 4 to be cooled and condensed by cooling water and then returns to the evaporator 10, and the concentrated lithium bromide concentrated solution returns to the absorber 9 after heat exchange and temperature drop by the post-combustion heat exchanger 18 to continuously absorb the refrigerant steam.
In the single-effect two-stage composite lithium bromide absorber refrigerating unit with afterburning shown in fig. 2, the afterburning generator 17 is communicated with the two-stage high-pressure condenser 4, and can also be communicated with the single-effect condenser 2.
In the single-effect two-stage composite lithium bromide absorber refrigerating unit with afterburning shown in fig. 2, the driving heat source flows through the single-effect generator 1, the two-stage low-pressure generator 8 and the two-stage high-pressure generator 3 in series; it can also be a series flow through the single-effect generator 1, the secondary high-voltage generator 3 and the secondary low-voltage generator 8; or firstly flows through the single-effect generator 1 and then flows through the secondary high-voltage generator 3 and the secondary low-voltage generator 8 in parallel.
In the single-effect two-stage composite lithium bromide absorber refrigerating unit with afterburning shown in fig. 2, the cooling water is divided into three paths, one path flows through the absorber 9, the other path flows through the second-stage absorber 7, and the other path flows in series first through the single-effect condenser 2 and then through the second-stage high-pressure condenser 4; the system can also be divided into three paths, wherein one path flows through the absorber 9, the other path flows through the secondary absorber 7, and the other path is connected in series, flows through the secondary high-pressure condenser 4 firstly and then flows through the single-effect condenser 2; or any other sequence of series, series-parallel or parallel flow through the absorber 9, the secondary absorber 7, the single-effect condenser 1 and the secondary high-pressure condenser 4.
Example 2
Referring to fig. 3, the utility model relates to a single-effect two-stage compound lithium bromide absorption refrigeration unit with afterburning, this unit comprises single-effect generator 1, single-effect condenser 2, second-stage high-pressure generator 3, second-stage high-pressure condenser 4, single-effect high-temperature heat exchanger 5, second-stage heat exchanger 6, second-stage absorber 7, second-stage low-pressure generator 8, absorber 9, evaporator 10, single-effect low-temperature heat exchanger 11, second-stage solution pump 12, first-stage solution pump 13, single-effect solution pump 14, refrigerant pump 15, afterburning solution pump 16, afterburning high-pressure generator 17-1, afterburning low-pressure generator 17-2, afterburning low-temperature heat exchanger 18-1, afterburning high-temperature heat exchanger 18-2, and control system and the pipeline, the valve etc. of connecting each part. The single-effect generator 1 and the single-effect condenser 2 are positioned in a cavity, the secondary high-pressure generator 3 and the secondary high-pressure condenser 4 are positioned in a cavity, the secondary low-pressure generator 8 and the secondary absorber 7 are positioned in a cavity and are respectively provided with a primary solution pump 13 and a secondary solution pump 12, the evaporator 10 and the absorber 9 are positioned in a cavity and are respectively provided with a refrigerant pump 15, a single-effect solution pump 14 and a afterburning solution pump 16, and the afterburning low-pressure generator 17-2 is communicated with the secondary high-pressure condenser 4. The cold water flows through the evaporator 10 to be cooled; the cooling water is divided into three paths which are connected in parallel, one path flows through an absorber 9, the other path flows through a two-stage absorber 7, and the other path flows through a single-effect condenser 2 and a two-stage high-pressure condenser 4 in series; a driving heat source is connected in series and flows through the single-effect generator 1, the secondary low-pressure generator 8 and the secondary high-pressure generator 3, and heat is released to drive the whole unit to operate in a single-effect and two-stage combined mode; the afterburning heat source flows through the afterburning high-pressure generator 17-1 to drive the whole unit to perform afterburning operation. When the unit is operated, the refrigerant water sprayed from the top of the evaporator 10 after being pumped by the refrigerant pump 15 exchanges heat with cold water flowing through the heat transfer tubes of the evaporator 10 to reduce the temperature of the refrigerant water, the refrigerant water is vaporized into refrigerant steam and then enters the absorber 9 to be absorbed by the primary lithium bromide solution, and the released heat is taken away by the cooling water flowing through the heat transfer tubes; after the concentration of the first-stage lithium bromide solution in the absorber 9 becomes dilute, the first-stage lithium bromide solution is pumped out by a single-effect solution pump 14, and enters the single-effect generator 1 after heat exchange and temperature rise through the single-effect low-temperature heat exchanger 11 and the single-effect high-temperature heat exchanger 5. The first-stage lithium bromide dilute solution is heated and concentrated by a driving heat source in the single-effect generator 1, the concentrated refrigerant steam enters the single-effect condenser 2, is cooled and condensed by cooling water, and the condensed refrigerant water returns to the evaporator 10; the concentrated primary lithium bromide concentrated solution enters a secondary low-pressure generator 8 after being subjected to heat exchange and temperature reduction through a single-effect high-temperature heat exchanger 5. The primary lithium bromide solution is heated and concentrated again by the driving heat source in the secondary generator 8, the concentrated refrigerant steam enters the secondary absorber 7 and is absorbed by the secondary solution (the released heat is taken away by cooling water flowing through the heat transfer pipe), the concentrated solution is pumped out by the primary solution pump 13, and the concentrated solution returns to the absorber 9 to absorb the refrigerant steam generated in the evaporator 10 again after heat exchange and temperature reduction by the single-effect low-temperature heat exchanger 11. The concentration of the secondary solution in the secondary absorber 7 is diluted after absorbing the refrigerant steam generated by the concentration of the primary solution in the secondary low-pressure generator 8, the diluted refrigerant steam is pumped out by the secondary solution pump 12, the refrigerant steam enters the secondary high-pressure generator 3 after being subjected to heat exchange and temperature rise by the secondary heat exchanger 6 and is heated and concentrated by the driving heat source, the concentrated refrigerant steam enters the secondary high-pressure condenser 4 and returns to the evaporator 10 after being cooled and condensed by cooling water, and the concentrated secondary solution returns to the secondary absorber 7 again after being subjected to heat exchange and temperature drop by the secondary heat exchanger 6 and continuously absorbs the refrigerant steam. While the single-effect and two-stage refrigeration cycle operates or independently, the afterburning solution pump 16 pumps out the lithium bromide dilute solution in the absorber 9, the lithium bromide dilute solution is heated by the heat exchange of the afterburning low-temperature heat exchanger 18-1 and the afterburning high-temperature heat exchanger 18-2 and then is sent into the afterburning high-pressure generator 17-1 to be heated and concentrated by the afterburning heat source, the concentrated lithium bromide solution is cooled by the heat exchange of the afterburning high-temperature heat exchanger 18-2 and then enters the afterburning low-pressure generator 17-2, the concentrated high-temperature refrigerant steam enters the heat transfer pipe of the afterburning low-pressure generator 17-2 to be used as the heat source to heat and concentrate the lithium bromide solution again, the heat released by the economizer is condensed and then enters the secondary high-pressure condenser 4, the refrigerant steam generated by the reconcentration of the solution also enters the secondary high-pressure condenser 4, is cooled and condensed by cooling water in the secondary high-pressure condenser 4 and then returns to the evaporator 10, and the concentrated lithium bromide solution is cooled by the afterburning low-temperature heat exchanger 18-1 and then returns to the absorber 9 to continuously absorb the refrigerant steam.
In the single-effect two-stage composite lithium bromide absorber refrigerating unit with afterburning shown in fig. 3, the afterburning low-pressure generator 17-2 is communicated with the two-stage high-pressure condenser 4, and can also be communicated with the single-effect condenser 2.
In the single-effect two-stage composite lithium bromide absorber refrigerating unit with afterburning shown in fig. 3, the driving heat source is serially connected and flows through the single-effect generator 1, the two-stage low-pressure generator 8 and the two-stage high-pressure generator 3; it can also be a series flow through the single-effect generator 1, the secondary high-voltage generator 3 and the secondary low-voltage generator 8; or firstly flows through the single-effect generator 1 and then flows through the secondary high-voltage generator 3 and the secondary low-voltage generator 8 in parallel.
In the single-effect two-stage composite lithium bromide absorber refrigerating unit with afterburning shown in fig. 3, the cooling water is divided into three paths, one path flows through the absorber 9, the other path flows through the second-stage absorber 7, and the other path flows in series first through the single-effect condenser 2 and then through the second-stage high-pressure condenser 4; the system can also be divided into three paths, wherein one path flows through the absorber 9, the other path flows through the secondary absorber 7, and the other path is connected in series, flows through the secondary high-pressure condenser 4 firstly and then flows through the single-effect condenser 2; or any other sequence of series, series-parallel or parallel flow through the absorber 9, the secondary absorber 7, the single-effect condenser 1 and the secondary high-pressure condenser 4.
In the single-effect two-stage composite lithium bromide absorber refrigerating unit with afterburning shown in fig. 3, the lithium bromide solution pumped by the afterburning solution pump 16 flows in series, first flows through the afterburning high-pressure generator 17-1, and then flows through the afterburning low-pressure generator 17-2; or the fuel can flow through the afterburning low-pressure generator 17-2 and then flow through the afterburning high-pressure generator 17-1 in series; or flows through the afterburning high-pressure generator 17-1 and the afterburning low-pressure generator 17-2 in parallel.
Claims (7)
1. A single-effect two-stage composite lithium bromide absorption refrigerating unit with afterburning comprises: including single-effect generator, single-effect condenser, second grade high pressure generator, second grade high pressure condenser, single-effect high temperature heat exchanger, single-effect low temperature heat exchanger, second grade low pressure generator, second grade absorber, evaporimeter, absorber, single-effect solution pump, one-level solution pump, second grade solution pump, cryogen pump, its characterized in that: the system also comprises a post-combustion solution pump, a post-combustion generator and a post-combustion heat exchanger, wherein the absorber, the post-combustion heat exchanger and the post-combustion generator are connected by the post-combustion solution pump to form a solution circulation path, the post-combustion generator is communicated with the secondary high-pressure condenser, a post-combustion heat source flows through the post-combustion generator, when a driving heat source cannot meet the refrigerating requirement of a unit, the added post-combustion solution pump pumps out a lithium bromide dilute solution in the absorber, the lithium bromide dilute solution is sent into the post-combustion generator through the post-combustion heat exchanger to be heated and concentrated by the post-combustion heat source, concentrated refrigerant steam enters the secondary high-pressure condenser and then enters the evaporator, and a concentrated lithium bromide solution returns to the absorber through the post-combustion heat exchanger.
2. The single-effect two-stage compound lithium bromide absorption refrigerating unit with afterburning as claimed in claim 1, wherein: the afterburning generator is divided into an afterburning high-pressure generator and an afterburning low-pressure generator, and the afterburning heat exchanger is divided into an afterburning low-temperature heat exchanger and an afterburning high-temperature heat exchanger; the lithium bromide dilute solution in the absorber is pumped out by the afterburning solution pump, and is sent into the afterburning high-pressure generator through the afterburning low-temperature heat exchanger and the afterburning high-temperature heat exchanger to be heated and concentrated by an afterburning heat source, the concentrated lithium bromide solution enters the afterburning low-pressure generator through the afterburning high-temperature heat exchanger, the concentrated high-temperature refrigerant steam enters a heat transfer pipe of the afterburning low-pressure generator to be used as a heat source to heat and concentrate the lithium bromide solution again, the heat released by the lithium bromide solution is condensed and then enters a secondary high-pressure condenser, the refrigerant steam generated by the re-concentration of the lithium bromide solution also enters the secondary high-pressure condenser, and the re-concentrated lithium bromide solution returns to the absorber through the afterburning low-temperature heat exchanger.
3. The single-effect two-stage compound lithium bromide absorption refrigerating unit with afterburning as claimed in claim 2, wherein: the lithium bromide solution pumped by the afterburning solution pump of the unit is serially connected and firstly flows through the afterburning high-pressure generator and then flows through the afterburning low-pressure generator for concentration.
4. The single-effect two-stage composite lithium bromide absorption refrigerating unit with afterburning of claim 2, characterized in that: the lithium bromide solution pumped out by the afterburning solution pump of the unit is serially connected, flows through the afterburning low-pressure generator firstly and then flows through the afterburning high-pressure generator for concentration.
5. The single-effect two-stage compound lithium bromide absorption refrigerating unit with afterburning as claimed in claim 2, wherein: the lithium bromide solution pumped by the afterburning solution pump of the unit is concentrated by flowing through the afterburning high-pressure generator and the afterburning low-pressure generator in parallel.
6. The single-effect two-stage compound lithium bromide absorption refrigerating unit with afterburning as claimed in claim 1, wherein: the afterburning generator is communicated with the secondary high-pressure condenser, and refrigerant steam generated by concentrating the lithium bromide solution enters the secondary high-pressure condenser.
7. The single-effect two-stage composite lithium bromide absorption refrigerating unit with afterburning function as claimed in claim 1, wherein: the afterburning generator is communicated with the single-effect condenser, and refrigerant steam generated by concentrating the lithium bromide solution enters the single-effect condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223099497.6U CN218672688U (en) | 2022-11-22 | 2022-11-22 | Single-effect two-stage composite lithium bromide absorption refrigerating unit with afterburning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202223099497.6U CN218672688U (en) | 2022-11-22 | 2022-11-22 | Single-effect two-stage composite lithium bromide absorption refrigerating unit with afterburning |
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