Large first-class lithium bromide absorption heat pump unit for preparing high-temperature heat source

Abstract

The utility model relates to a large first-class lithium bromide absorption heat pump unit for preparing a high-temperature heat source. Comprising a generator A, a condenser A, a generator B, a condenser B, an evaporator A, an absorber A, an evaporator B, an absorber B, a heat exchanger A, a heat exchanger B, a solution pump A, a refrigerant pump A, a solution pump B, a refrigerant pump B, an internal circulation water pump, an internal circulation medium-temperature hot water system, pipelines, valves and the like, recycled low-temperature waste heat source heat is transferred to internal circulation medium-temperature hot water through the evaporator A and the absorber A. The internal circulation medium-temperature hot water enables the evaporation temperature of the evaporator B to be increased and the absorption pressure to be increased, so that the absorber B produces a high-temperature heat source. The generator and the condenser adopt independent cylinders, the pressure bearing capacity and the thermal displacement capacity of the unit are improved, the generating pressure and the condensing temperature are increased, and a high-temperature heat source can be produced. The unit expands the application field, realizes single-unit upsizing, improves the comprehensive utilization rate of energy, reduces the occupied area of the unit due to up-down arrangement, and reduces the total investment.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigeration equipment technical field, concretely relates to a kind of large-scale first lithium bromide absorption heat pump unit of high-temperature heat source preparation. BACKGROUND

[0002] Conventional first lithium bromide absorption heat pump unit (such as Figure 1 ), it is using small amount high-temperature heat source as driving heat source, recycles and utilizes low-temperature waste heat in production process, prepares out medium-temperature heat source, for production process use or northern winter heating, performance coefficient COP is about 1.7, can save 40% energy consumption, realizes the comprehensive utilization of energy, but the medium-temperature heat source that it prepares out export temperature is generally highest not more than 95 DEG C, when application site needs high-temperature heat source, such as high-temperature heat source temperature is greater than 95 DEG C, the conventional unit cannot meet the demand. How to use first lithium bromide absorption heat pump technology, when recycling low-temperature waste heat in production process, prepares out 95 DEG C above high-temperature heat source, expands heat pump technology application field, saves high-quality energy, becomes one of the important research topics at present. SUMMARY

[0003] The utility model aims at overcoming above-mentioned insufficient, provide a kind of large-scale first lithium bromide absorption heat pump unit of high-temperature heat source preparation of low-temperature waste heat recovery, saves high-quality energy, can meet the demand of the place where heat source temperature is greater than 95 DEG C above, expands heat pump technology application field, saves floor area, reduces investment.

[0004] The utility model aims at overcoming above-mentioned insufficient, provide a kind of large-scale first lithium bromide absorption heat pump unit of high-temperature heat source preparation of low-temperature waste heat recovery, saves high-quality energy, can meet the demand of the place where heat source temperature is greater than 95 DEG C above, expands heat pump technology application field, saves floor area, reduces investment.

[0005] A kind of large-scale first lithium bromide absorption heat pump unit of high-temperature heat source preparation, including generator A, condenser A, generator B, condenser B, evaporator A, absorber A, evaporator B, absorber B, heat exchanger A, heat exchanger B, solution pump A, refrigerant pump A, solution pump B, refrigerant pump B and inner circulating water pump;

[0006] by generator A, condenser A, evaporator A, absorber A, heat exchanger A, solution pump A and refrigerant pump A form a independent heat pump cycle A of low solution concentration;

[0007] by generator B, condenser B, evaporator B, absorber B, heat exchanger B, solution pump B and refrigerant pump B form a independent heat pump cycle B of high solution concentration;

[0008] Inner circulating medium-temperature hot water is formed between absorber A and evaporator B by inner circulating water pump in inner circulating medium-temperature hot water system;

[0009] The evaporator A and the absorber A are arranged in the same lowest pressure cylinder, the evaporator B and the absorber B are arranged in the same medium-low pressure cylinder and above the lowest pressure cylinder;

[0010] The generator A and the condenser A are arranged in two independent cylinders with the same pressure and above the medium-low pressure cylinder;

[0011] The generator B and the condenser B are arranged in two independent cylinders with the same pressure and above the generator A and the condenser A.

[0012] Preferably, the high-temperature heat source is divided into two paths, one of which enters the condenser A and the other of which enters the absorber B and the condenser B in any order, and the two paths of high-temperature heat source are combined and discharged after being heated and raised in temperature.

[0013] Preferably, the high-temperature heat source enters the condenser A through the high-temperature heat source regulating valve C, the flow of the high-temperature heat source into the heat transfer pipe of the condenser A is adjusted through the high-temperature heat source regulating valve C, and the temperature of the high-temperature heat source obtained by the heat pump cycle A and the heat pump cycle B is ensured to be the same.

[0014] Preferably, the high-temperature heat source enters the absorber B, the condenser A and the condenser B in sequence, and the high-temperature heat source is discharged after being heated and raised in temperature.

[0015] Preferably, the high-temperature heat source enters the condenser A, the condenser B and the absorber B in sequence, and the high-temperature heat source is discharged after being heated and raised in temperature.

[0016] Preferably, the driving heat source is connected in parallel and enters the generator A through the electric regulating valve A and enters the generator B through the electric regulating valve B.

[0017] Preferably, the low-temperature waste heat source enters the heat transfer pipe of the evaporator A, heats the coolant water outside the pipe to evaporate, and is discharged after releasing heat.

[0018] Preferably, the internal circulating medium-temperature hot water system is supplied by the external internal circulating water pressure regulating water supply.

[0019] Preferably, the evaporator A and the absorber A are arranged left, middle and right, the evaporator A is in the middle, the absorber A is on both sides, and they are separated by a liquid baffle group.

[0020] The evaporator B and the absorber B are arranged left, middle and right, the evaporator B is in the middle, the absorber B is on both sides, and they are separated by a liquid baffle group.

[0021] Preferably, the top of the generator A cylinder is provided with a steam drum A, and the steam drum A is connected with the top of the condenser A cylinder through a plurality of coolant steam pipelines A.

[0022] The top of the generator B cylinder is provided with a steam drum B, and the steam drum B is connected with the top of the condenser B cylinder through a plurality of refrigerant steam pipelines B.

[0023] The present application has the advantages that:

[0024] The large first-type lithium bromide absorption heat pump unit for preparing high-temperature heat source has the independent cylinder of the generator and the condenser, the pressure bearing and heat displacement capacity of the unit are improved, the high-temperature and high-pressure conditions are adapted, the concentration of the concentrated solution of the generator is certain under the driving of the high-quality driving heat source, the temperature and the generation pressure of the concentrated solution are improved, the temperature of the generated refrigerant steam is improved, the condensing temperature of the condenser is improved, the temperature of the high-temperature heat source is greatly improved after the high-temperature heat source absorbs the condensing heat of the high-temperature refrigerant steam, and the high-temperature heat source above 95 DEG C which cannot be prepared by the conventional unit can be prepared. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic view of a conventional first-type lithium bromide absorption heat pump unit.

[0026] Figure 2 It is a structural schematic view of a large first-type lithium bromide absorption heat pump unit for preparing high-temperature heat source.

[0027] Figure 3 It is a structural schematic view of another large first-type lithium bromide absorption heat pump unit for preparing high-temperature heat source.

[0028] Figure 4 It is a structural schematic view of still another large first-type lithium bromide absorption heat pump unit for preparing high-temperature heat source.

[0029] Wherein: evaporator 1, absorber 2, heat exchanger 3, high-quality heat source out 4, high-quality heat source in 5, generator 6, condenser 7, high-temperature heat source out 8, low-temperature heat source out 9, low-temperature heat source in 10, high-temperature heat source in 11, refrigerant pump 12, solution pump 13, high-temperature heat source regulating valve C 14, internal circulation constant pressure water supply 15, internal circulation water pump 16, internal circulation medium-temperature hot water system 17, refrigerant pump A 18, solution pump B 19, evaporator A 20, absorber A 21, heat exchanger A 22, refrigerant pump B 23, solution pump B 24, evaporator B 25, absorber B 26, heat exchanger B 27, electric regulating valve A 28, electric regulating valve B 29, steam drum B 30, refrigerant steam pipeline B 31, generator B 32, condenser B 33, steam drum A 34, refrigerant steam pipeline A 35, condenser A 36, generator A 37. DETAILED DESCRIPTION

[0030] Referring to Figure 2 The utility model relates to a kind of large-scale first type lithium bromide absorption heat pump unit of high-temperature heat source preparation, including generator A 37, condenser A 36, generator B 32, condenser B 33, evaporator A 20, absorber A 21, evaporator B 25, absorber B 26, heat exchanger A 22, heat exchanger B 27, solution pump A 19, refrigerant pump A 18, solution pump B 24, refrigerant pump B 23, internal circulation water pump 16, internal circulation medium-temperature hot water system 17 and the pipeline, valve and control system between connecting each component, evaporator A 20 and absorber A 21 are arranged in same lowest pressure cylinder, left middle right arrangement, evaporator A 20 is in the middle, absorber A 21 is on both sides, they are separated by liquid baffle group, place in lower part;Evaporator B 25 and absorber B 26 are arranged in same medium-low pressure cylinder, left middle right arrangement, evaporator B 25 is in the middle, absorber B 26 is on both sides, they are separated by liquid baffle group, place in evaporator A 20 and absorber A 21 cylinder upper portion;Generator A 37 and condenser A 36 are respectively in two independent equal-height pressure cylinder, and are placed side by side, generator A 37 cylinder top is equipped with steam drum A 34, steam drum A 34 is connected with condenser A 36 cylinder top by refrigerant steam pipeline A 35, places in evaporator B 25 and absorber B 26 cylinder upper portion;Generator B 32 and condenser B 33 are respectively in two independent equal-height pressure cylinder, and are placed side by side, generator B 32 cylinder top is equipped with steam drum B 30, steam drum B 30 is connected with condenser B 33 cylinder top by refrigerant steam pipeline B 31, places in generator A 37 and condenser A 36 cylinder upper portion.

[0031] A37, condenser A36, evaporator A20, absorber A21, heat exchanger A22, solution pump A19 and refrigerant pump A18, etc. to form a low-concentration solution heat pump cycle A; and generator B32, condenser B33, evaporator B25, absorber B26, heat exchanger B27, solution pump B24 and refrigerant pump B23, etc. to form a high-concentration solution heat pump cycle B.

[0032] The heat pump cycle A and the heat pump cycle B are associated together through the internal circulation medium-temperature hot water system 17 and the external system, the high-grade driving heat source is connected in parallel and respectively enters the heat transfer pipe of the generator A37 through the electric regulating valve A28 and enters the heat transfer pipe of the generator B32 through the electric regulating valve B29, and the solution outside the heat transfer pipes of the generators A37 and B32 is heated to be concentrated and to generate refrigerant steam, and the high-grade driving heat source is discharged after releasing heat; the low-temperature waste heat source enters the heat transfer pipe of the evaporator A20, and the refrigerant water outside the pipe is evaporated by being heated, and the low-temperature waste heat source is discharged after releasing heat; the internal circulation medium-temperature hot water is pumped into the heat transfer pipe of the absorber A21 by the internal circulation water pump 16, the internal circulation medium-temperature hot water is heated by absorbing heat of the solution outside the pipe, the internal circulation medium-temperature hot water after being heated enters the heat transfer pipe of the evaporator B25 to release heat and be cooled, and then the internal circulation medium-temperature hot water is pumped into the heat transfer pipe of the absorber A21 by the internal circulation water pump 16 to be heated and cooled in the heat transfer pipe of the evaporator B, so that the internal circulation medium-temperature hot water system 17 is formed, and the internal circulation medium-temperature hot water system 17 is supplied by the external internal circulation water pressure-keeping water supply 15; the high-temperature heat source is divided into two paths, one path enters the heat transfer pipe of the condenser A36 through the high-temperature heat source regulating valve C14 to absorb condensation heat, and the other path is connected in series and first enters the heat transfer pipe of the absorber B26 to absorb heat of the solution outside the pipe, and then enters the heat transfer pipe of the condenser B33 to absorb condensation heat of the refrigerant steam outside the pipe (or the other path is connected in series and first enters the heat transfer pipe of the condenser B33 to absorb condensation heat of the refrigerant steam outside the pipe, and then enters the heat transfer pipe of the absorber B26 to absorb heat of the solution outside the pipe), and the high-temperature heat source is heated to be heated and the high-temperature heat source is discharged after releasing heat, so that the high-temperature heat source with higher temperature is obtained.

[0033] As Figure 3 , the utility model relates to another kind of large-scale first type lithium bromide absorption heat pump unit for obtaining high-temperature heat source, cancel high-temperature heat source regulating valve C and corresponding branch pipeline, high-temperature heat source is connected in series and enters the heat transfer pipe of absorber B26 to absorb heat of the solution outside the pipe in turn, then enters the heat transfer pipe of condenser A36 to absorb condensation heat of the refrigerant steam outside the pipe, and finally enters the heat transfer pipe of condenser B33 to absorb condensation heat, and the high-temperature heat source is heated to be heated and the high-temperature heat source is discharged after releasing heat, so that the high-temperature heat source with higher temperature is obtained.

[0034] AsFigure 4 The utility model relates to a large -scale first kind lithium bromide absorption heat pump unit of another preparation high temperature heat source, cancel high temperature heat source regulating valve C and corresponding branch pipeline, high temperature heat source series connection enters the heat transfer pipe of condenser A in succession absorbs condensing heat, enters the heat transfer pipe of condenser B in succession absorbs the condensing heat of pipe outer refrigerant steam, last enters the heat transfer pipe of absorber B in succession absorbs the absorption heat of pipe outer solution, and high temperature heat source heat absorption temperature rises and flows out machine outside to obtain higher temperature high temperature heat source.

[0035] The working principles of the heat pump cycle A and the heat pump cycle B are same, and the dilute solution in the absorber is lifted by a solution pump, is sent into a generator by a heat exchanger, is heated and concentrated into a concentrated solution by a high-quality driving heat source in the heat transfer pipe of the generator, and cold agent steam is generated, the cold agent steam is condensed into cold agent water in a condenser, and the latent heat is absorbed by the high temperature heat source in the heat transfer pipe. The cold agent water enters the evaporator by throttling and pressure reduction, is lifted by a cold agent pump, is sprayed on the surface of the heat transfer pipe of the evaporator by a liquid distribution device, the cold agent water is evaporated into cold agent steam by absorbing the heat of the residual heat in the pipe, and the residual heat is reduced and flows out of the unit. The concentrated solution is reduced in temperature by the heat exchanger, flows into the absorber by pressure difference and height difference, is sprayed on the surface of the heat transfer pipe of the absorber by the liquid distribution device, the concentrated solution is changed into the dilute solution by absorbing the cold agent steam generated by the evaporator, and the heat released by absorbing the cold agent steam is transferred to the high temperature heat source to be prepared.

[0036] The driving heat source can be steam, heat conducting oil or other heat sources, the low temperature residual heat source can be exhaust steam, water or other heat sources, and the high temperature heat source to be prepared can be hot water, chemical materials or the like.

[0037] In addition to the above-mentioned embodiments, the utility model also includes other implementation manners, and the technical solutions formed by equivalent transformation or equivalent replacement should fall into the protection scope of the utility model claims.

Claims

1. A large-scale lithium bromide absorption heat pump unit of the first type for producing high-temperature heat sources, comprising a generator A, a condenser A, a generator B, a condenser B, an evaporator A, an absorber A, an evaporator B, an absorber B, a heat exchanger A, a heat exchanger B, a solution pump A, a refrigerant pump A, a solution pump B, a refrigerant pump B and an internal circulating water pump, characterized in that: a low-concentration solution heat pump cycle A is formed by the generator A, the condenser A, the evaporator A, the absorber A, the heat exchanger A, the solution pump A and the refrigerant pump A; a high-concentration solution heat pump cycle B is formed by the generator B, the condenser B, the evaporator B, the absorber B, the heat exchanger B, the solution pump B and the refrigerant pump B; an internal circulating medium-temperature hot water system is formed between the absorber A and the evaporator B by the internal circulating water pump; the evaporator A and the absorber A are arranged in the same lowest pressure cylinder; the evaporator B and the absorber B are arranged in the same medium-low pressure cylinder and above the lowest pressure cylinder; the generator A and the condenser A are arranged in two independent equal pressure cylinders and above the medium-low pressure cylinder; the generator B and the condenser B are arranged in two independent equal pressure cylinders and above the generator A and the condenser A cylinders; the high-temperature heat sources are divided into two paths, one of which enters the condenser A and the other of which enters the absorber B and the condenser B in any order, and the two paths of high-temperature heat sources are combined and discharged from the unit after being heated and raised in temperature; the high-temperature heat sources enter the absorber B, the condenser A and the condenser B in any order, and the high-temperature heat sources are discharged from the unit after being heated and raised in temperature; the high-temperature heat sources enter the condenser A through the high-temperature heat source regulating valve C, the flow of the high-temperature heat sources into the heat transfer pipes of the condenser A is regulated by the high-temperature heat source regulating valve C, and the temperature of the high-temperature heat sources produced by the heat pump cycle A and the heat pump cycle B is ensured to be the same; the driving heat sources enter the generator A through the electric regulating valve A and enter the generator B through the electric regulating valve B in parallel; the low-temperature waste heat sources enter the heat transfer pipes of the evaporator A, heat the refrigerant water outside the pipes to make it evaporate, and are discharged from the unit after releasing heat; the internal circulating medium-temperature hot water system is supplied with water by an external internal circulating water pressure regulating device; the evaporator A and the absorber A are arranged left, middle and right, with the evaporator A in the middle and the absorber A on both sides, and they are separated by a liquid baffle group; the evaporator B and the absorber B are arranged left, middle and right, with the evaporator B in the middle and the absorber B on both sides, and they are separated by a liquid baffle group; the generator A cylinder is provided with a steam drum A, and the steam drum A is connected to the top of the condenser A cylinder through a plurality of refrigerant steam pipelines A; and the generator B cylinder is provided with a steam drum B, and the steam drum B is connected to the top of the condenser B cylinder through a plurality of refrigerant steam pipelines B. ​ ​ ​ ​ ​ ​ ​ 2. A large scale lithium bromide absorption heat pump unit of the first kind for producing a high temperature heat source according to claim 1, characterized in that: ​ 3. A large scale lithium bromide absorption heat pump unit of the first kind for producing a high temperature heat source according to claim 1, characterized in that: ​ 4. A large scale lithium bromide absorption heat pump unit of the first kind for producing a high temperature heat source according to claim 2, characterized in that: ​ 5. A large scale first kind lithium bromide absorption heat pump chiller for producing high temperature heat source as claimed in claim 1 or claim 2 or claim 3 wherein: ​ 6. A large scale lithium bromide absorption heat pump unit of the first kind for producing a high temperature heat source according to claim 5, characterized in that: ​ 7. A large scale lithium bromide absorption heat pump unit of the first kind for producing a high temperature heat source according to claim 1, characterized in that: ​ 8. A large scale lithium bromide absorption heat pump unit of the first kind for producing a high temperature heat source according to claim 1, characterized in that: ​ ​ 9. A large scale lithium bromide absorption heat pump unit of the first kind for producing a high temperature heat source according to claim 1, characterized in that: ​ ​

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