CN-116412553-B - Plate type absorption heat exchanger

CN116412553BCN 116412553 BCN116412553 BCN 116412553BCN-116412553-B

Abstract

The application relates to a plate-type absorption heat exchanger, which comprises an equipment underframe, and a heat pump unit, a first solution tank, a second solution tank, a circulating pump, a brazed heat exchanger and a detachable plate heat exchanger which are arranged on the equipment underframe, wherein the heat pump unit comprises a shell, the interior of the shell is divided into four cavities, and a generator, a condenser, an absorber and an evaporator are respectively arranged in the four cavities. The inside of the generator, the condenser, the absorber and the evaporator is in a plate structure. The generator, the condenser, the evaporator and the absorber of the heat pump unit of the plate type absorption heat exchanger are of plate type structures, and have the advantages of high compactness, small size and low cost.

Inventors

WU SHUANG
LIU KAI
LI CHUNMEI
LI ZHIBO
WANG CHUNYAN
ZHANG JIANCHAO

Assignees

四平市巨元瀚洋板式换热器有限公司

Dates

Publication Date: 20260505
Application Date: 20211230

Claims (7)

1. The plate type absorption heat exchanger is characterized by comprising an equipment underframe, and a heat pump unit, a first solution tank, a second solution tank, a circulating pump, a brazed heat exchanger and a detachable plate type heat exchanger which are arranged on the equipment underframe, wherein the heat pump unit comprises a shell, the interior of the shell is divided into four cavities, and a generator, a condenser, an absorber and an evaporator are respectively arranged in the four cavities; the generator, the condenser, the absorber or the evaporator comprises sealing plates, the sealing plates are welded and connected on a pair of opposite inner side walls in the inner cavity of the heat pump unit, two groups of mutually spliced combined structures with the same structure are arranged between the two sealing plates, each group of combined structures comprises a plurality of plate pairs, a plurality of upper liquid distributors, a plurality of lower liquid distributors, a steam collecting box, an upper solution collecting box, a lower solution collecting box and a rubber backing plate, and the rubber backing plate is arranged between the sealing plates and the side surfaces of the combined structures; The upper ends and the lower ends of the plate pairs are respectively connected with an upper liquid distributor and a lower liquid distributor in a welding way, the upper liquid distributor comprises a steam channel and an upper solution channel, the lower liquid distributor comprises a lower solution channel, and the inner channels of the plate pairs are communicated with the steam channel of the upper liquid distributor, the upper solution channel and the lower solution channel of the lower liquid distributor; The steam channels of the upper liquid distributor are collected into a steam collecting box, the steam collecting box is connected with a steam pipeline, the upper solution channels of the upper liquid distributor are collected into an upper solution collecting box, the upper solution collecting box is connected with an upper solution pipeline, the lower solution channels of all lower liquid distributors are collected into a lower solution collecting box, and the lower solution collecting box is connected with a lower solution pipeline; The upper and lower ends of the side surfaces of the plate pair are provided with an upper water through port and a lower water through port, and the upper water through port, the lower water through port and a channel between the plate pair are communicated; Valves are arranged on the steam pipeline, the upper solution pipeline and the lower solution pipeline and are used for maintaining the vacuum environment of the lithium bromide channel during cleaning.
2. The plate heat exchanger of claim 1 wherein the generator or condenser or absorber or evaporator further comprises a plurality of second plate pairs, a plurality of second upper liquid distributors, a plurality of second lower liquid distributors, a second vapor collection box, a second upper solution collection box, a second lower solution collection box, a second rubber gasket disposed between the second seal plate and the plurality of second plate pair sides; The upper ends and the lower ends of the plurality of second plate pairs are respectively connected with a second upper liquid distributor and a second lower liquid distributor in a welding way, the second upper liquid distributor comprises a second steam channel and a second upper solution channel, the second lower liquid distributor comprises a second lower solution channel, and the inner channel of the second plate pairs is communicated with the second steam channel of the second upper liquid distributor, the second upper solution channel and the second lower solution channel of the second lower liquid distributor; The second steam channels of all the second upper liquid distributors are collected in a second steam collecting box, the second steam collecting box is connected with a second steam pipeline, the second upper solution channels of all the second upper liquid distributors are collected in a second upper solution collecting box, the second upper solution collecting box is connected with a second upper solution pipeline, the second lower solution channels of all the second lower liquid distributors are collected in a second lower solution collecting box, and the second lower solution collecting box is connected with a second lower solution pipeline; the upper end and the lower end of the side surface of the second plate pair are provided with a second upper water through port and a second lower water through port, and the second upper water through port, the second lower water through port, the upper water through port, the lower water through port and a channel between the second plate pair are communicated; the combined structure of the upper liquid distributor, the plate pair and the lower liquid distributor is mutually spliced with the combined structure of the second upper liquid distributor, the second plate pair and the second lower liquid distributor.
3. A plate type absorption heat exchanger as set forth in claim 2 wherein the upper liquid distributor and the second upper liquid distributor are identical in structure, the upper liquid distributor is composed of a square steam channel in the middle and square upper solution channels on two sides, one side of each square steam channel is open, the other side of each square steam channel is sealed, the lower end of each steam channel is open, a partition plate is arranged in each upper solution channel, the lower end of each partition plate is connected with the outer side wall of each upper solution channel, a gap is reserved between each partition plate and the inner side wall and the upper side wall of each upper solution channel, the upper ends of the plate pairs are welded with the lower edges of the partition plates, and the inner channels of the plate pairs are communicated with the steam channels and the upper solution channels.
4. The plate type absorption heat exchanger of claim 2, wherein the lower liquid distributor and the second lower liquid distributor are identical in structure, the lower liquid distributor is square, long holes are formed in the upper side wall, channels in the plate pairs are communicated with the lower liquid distributor through the long holes, and one side of the lower liquid distributor is opened and collected into a lower solution collecting box.
5. A plate type absorption heat exchanger according to claim 2 wherein the plate pair and the second plate pair have the same structure, the plate pair is composed of two plates, the plate body is of a flat groove structure, arc-shaped corrugations protruding to one side are pressed on the plate body, the groove sides of the two plates are opposite, two side edges are welded and connected, a channel is formed between the two plates, and an upper water port and a lower water port are formed at the upper end and the lower end of each plate.
6. A plate heat exchanger according to claim 2 wherein the vapor passage of the second upper distributor is disposed between two adjacent upper solution passages of the upper distributor, the second plate pair is disposed between the plate pairs, and the lower distributor is disposed between the second plate pairs.
7. A plate absorption heat exchanger according to claim 2 wherein: The heat source pipeline is connected with a lower water through hole of the generator, an upper water through hole of the generator is connected with a hot side inlet of the detachable heat exchanger through a pipeline provided with a valve, a hot side outlet of the detachable heat exchanger is connected with a lower water through hole of the evaporator through a pipeline provided with a valve, and a heat source is discharged from the upper water through hole of the evaporator; The inlet pipeline of the cold water-filled valve is divided into two paths, the first path is connected with the cold side inlet of the detachable heat exchanger through a pipeline, the cold side outlet of the detachable heat exchanger is connected with the cold water outlet pipeline provided with the valve after being converged with the second path through a pipeline, the second path of the inlet pipeline provided with the cold water-filled valve is connected with the lower water through a pipeline provided with the valve of the absorber, the upper water through port of the absorber is connected with the lower water through a pipeline provided with the valve of the condenser, and the upper water through port of the condenser is converged with the first path through a pipeline provided with the valve; the outlet of the first solution tank filled with lithium bromide solution is respectively connected with the upper solution pipelines at the two sides of the evaporator through pipelines provided with a circulating pump and a valve, the pipelines are communicated with the lower solution pipelines at the two sides of the condenser, the steam pipelines at the two sides of the evaporator are connected with the steam pipelines at the same side of the absorber, the lower solution pipelines at the two sides of the evaporator are connected with the pipelines provided with the valve, and the two pipelines are connected with the inlet of the first solution tank after being collected; the lower solution pipelines at two sides of the absorber are connected with the inlet of a second solution tank after being gathered through pipelines with valves, the outlet of the second solution tank is connected with the cold side inlet of the brazing type heat exchanger through pipelines with circulating pumps and valves, the cold side outlet pipeline of the brazing type heat exchanger is divided into two paths, the two paths are respectively connected with the upper solution pipelines at two sides of the generator through pipelines with valves, the outlets of the lower solution pipelines at two sides of the generator are connected with the hot side inlet of the brazing type heat exchanger through pipelines with valves after being gathered, and the hot side outlet of the brazing type heat exchanger is divided into two paths to be connected with the upper solution pipelines at two sides of the absorber; the first solution tank is connected with the second solution tank.

Description

Plate type absorption heat exchanger Technical Field The invention relates to the field of heat exchange equipment, in particular to a heat exchange device integrated by a hot water type absorption heat pump and a conventional heat exchanger. Background The absorption heat exchanger utilizes a large amount of medium-temperature heat source to generate a small amount of high-temperature useful heat energy. The medium-low heat energy is utilized to drive, and a great amount of heat potential difference of the medium-temperature heat source and the low-temperature heat source is utilized to prepare heat quantity which is less than but higher than that of the medium-temperature heat source, so that part of medium-low heat energy is transferred to a higher temperature, and the utilization grade of the heat source is improved. Is an effective device for recycling low-temperature heat energy, and has the dual functions of saving energy and protecting environment. The basic structure of the absorption heat exchanger in the prior art comprises a generator, a condenser, an evaporator and an absorber, wherein the generator and the condenser form a generating-condensing unit, the absorber and the evaporator form an absorbing-evaporating unit, and the inside of the generator, the condenser, the evaporator and the absorber is of a heat exchange tube type structure, and the defect of the heat exchange tube type structure is that the product is low in compactness, large in size, low in reliability and high in manufacturing cost. Disclosure of Invention The invention aims to provide a plate type absorption heat exchanger designed based on an absorption heat exchange principle, which has the advantages of small size, compact structure and low cost. The technical scheme of the invention is as follows: The plate type absorption heat exchanger comprises an equipment underframe, and a heat pump unit, a first solution tank, a second solution tank, a circulating pump, a brazed heat exchanger and a detachable plate type heat exchanger which are arranged on the equipment underframe, wherein the heat pump unit comprises a shell, the interior of the shell is divided into four cavities, and a generator, a condenser, an absorber and an evaporator are respectively arranged in the four cavities; The generator, the condenser, the absorber or the evaporator comprises sealing plates, the sealing plates are welded and connected on a pair of opposite inner side walls in the inner cavity of the heat pump unit, a plurality of plate pairs, a plurality of upper liquid distributors, a plurality of lower liquid distributors, a steam collecting box, an upper solution collecting box, a lower solution collecting box and a rubber backing plate are arranged between the two sealing plates, and the rubber backing plate is arranged between the sealing plates and the side surfaces of the plurality of plate pairs; The upper ends and the lower ends of the plate pairs are respectively connected with an upper liquid distributor and a lower liquid distributor in a welding way, the upper liquid distributor comprises a steam channel and an upper solution channel, the lower liquid distributor comprises a lower solution channel, and the inner channels of the plate pairs are communicated with the steam channel of the upper liquid distributor, the upper solution channel and the lower solution channel of the lower liquid distributor; The steam channels of the upper liquid distributor are collected into a steam collecting box, the steam collecting box is connected with a steam pipeline, the upper solution channels of the upper liquid distributor are collected into an upper solution collecting box, the upper solution collecting box is connected with an upper solution pipeline, the lower solution channels of all lower liquid distributors are collected into a lower solution collecting box, and the lower solution collecting box is connected with a lower solution pipeline; The upper and lower ends of the side surfaces of the plate pair are provided with an upper water through port and a lower water through port, and the upper water through port, the lower water through port and the channels between the plate pair are communicated. The invention has the beneficial effects that: 1. the generator, the condenser, the evaporator and the absorber of the heat pump unit of the plate type absorption heat exchanger are of plate type structures, and have the advantages of high compactness, small size and low cost. 2. The absorption heat exchanger is easy to scale on the water side in operation, the heat exchange effect of the plate heat pump is greatly influenced, the timely cleaning of the dirt on the water side is a problem which needs to be considered, the tubular absorption heat exchanger in the prior art is non-detachable and cannot be cleaned, and the heat pump unit is of a detachable structure, can clean and clear the dirt, and has good heat exchange effect. 3. When the plate is