A machine set and process for recycling high-pressure fluid energy for liquid-guiding cooling washing

Abstract

The application discloses a unit and process for recovering high-pressure fluid energy for liquid-guiding cooling washing in the field of absorption refrigeration technology, which comprises a generator, an absorber, a condenser and an evaporator, and further comprises a first ejector, a second ejector, a heat exchanger and an absorption assembly; high-pressure liquid in the generator and the condenser respectively ejects low-pressure liquid in the absorber and the evaporator and mixes to prepare medium-pressure solution and medium-pressure liquid refrigerant; the prepared medium-pressure solution is used for absorbing gaseous refrigerant in the unit maintenance replacement air; the medium-pressure liquid refrigerant is used as a cold source in the absorption process; the medium-pressure liquid refrigerant is absorbed by the medium-pressure solution after heat absorption and gasification; through the above operation, the problem of refrigerant loss in the unit maintenance replacement process can be solved, and the energy contained in the solution and the liquid refrigerant can be fully utilized, so that the development goal of energy saving and emission reduction, low carbon environmental protection and energy efficient utilization is achieved, and the application has important strategic significance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of absorption refrigeration, in particular to a unit and process for recovering high-pressure fluid energy for liquid guiding, cooling and washing. BACKGROUND

[0002] The absorption refrigeration unit is driven by low-grade waste heat using thermal working medium, and refrigeration is achieved through phase change of the working medium (such as ammonia). The main equipment includes generator, condenser, evaporator, absorber, solution pump, etc.

[0003] The above refrigeration unit often needs to discharge the medium in the unit to provide the condition for maintenance during maintenance. In the actual maintenance process, the solution and liquid refrigerant in the unit are often pumped into the storage tank, and the gaseous refrigerant in the unit is mostly replaced by nitrogen to discharge outside the unit and then sent to the flare system for treatment. With the long-term operation of the unit and the increasing number of maintenance, the refrigerant in the unit is continuously lost, which reduces the refrigeration load of the unit, causes the unit to need to supplement refrigerant, increases the operation and maintenance cost, and is not conducive to the long-term and stable operation of the unit.

[0004] In addition, the solution in the unit is divided into high-pressure solution and low-pressure solution, which are stored in the generator and absorber, respectively. The liquid refrigerant in the unit is divided into high-pressure liquid refrigerant and low-pressure liquid refrigerant, which are stored in the condenser and evaporator, respectively. When the liquid is guided, the above four kinds of liquid are pumped into the storage tank by the pump. Although it is feasible, the energy contained in the four kinds of liquid is not fully utilized, and the development goals of energy saving and emission reduction, low carbon environmental protection and energy efficient utilization cannot be achieved. SUMMARY

[0005] The purpose of the present application is to provide a unit and process for recovering high-pressure fluid energy for liquid guiding, cooling and washing, which solves the problem of continuous loss of refrigerant in the unit caused by long-term operation of the existing unit and increasing number of maintenance.

[0006] The present application achieves the above-mentioned purpose by the following technical scheme: a unit for recovering high-pressure fluid energy for liquid guiding, cooling and washing, comprising a generator, an absorber, a condenser and an evaporator, the unit further comprising a first ejector, a second ejector, a heat exchanger and an absorption assembly.

[0007] The second ejector is used to inject the low-pressure solution in the absorber with the high-pressure solution in the generator to make a medium-pressure solution. The first ejector is used to inject the low-pressure liquid refrigerant in the evaporator with the high-pressure liquid refrigerant in the condenser to make a medium-pressure liquid refrigerant. The absorption assembly absorbs the gaseous refrigerant in the unit maintenance replacement gas with the medium-pressure solution. The heat exchanger is used to absorb the heat of the solution discharged from the absorption assembly with the circulating water and the medium-pressure liquid refrigerant.

[0008] Preferably, the heat exchanger comprises a second shell, two first shells respectively arranged at two ends of the second shell, heat exchange pipes arranged in the second shell and used for connecting the two first shells, and a partition plate arranged in the first shell;

[0009] The partition plate is used for dividing the inner cavity of the first shell into a circulating water cavity and a refrigerant cavity.

[0010] Preferably, the absorption assembly comprises an absorption cylinder communicated with the top of the second shell, a spiral inner coil arranged in the absorption cylinder, and a jacket arranged outside the absorption cylinder. First and second inlets are respectively arranged on the upper and lower sides of the side wall of the absorption cylinder. A scrubbing gas outlet is arranged above the absorption cylinder.

[0011] Preferably, the outlet of the first ejector is communicated with the inlet of the refrigerant cavity, the outlet of the second ejector is communicated with the first inlet through a pump, the outlet of the refrigerant cavity is communicated with the inlet of the jacket, the outlet of the jacket is communicated with the second inlet, and the outlet of the circulating water cavity is communicated with the spiral inner coil.

[0012] Preferably, a spray head is arranged at the top of the inner cavity of the absorption cylinder and communicated with the first inlet. An air inlet distribution pipe is arranged at the bottom of the inner cavity of the absorption cylinder and communicated with the second inlet.

[0013] Preferably, the bottom of the second shell is communicated with the inlet of the pump through a pipeline. A first switch valve is arranged on the pipeline. A second switch valve is arranged on the outlet of the second ejector. A third switch valve is arranged on the inlet of the pump. A fourth switch valve and a sixth switch valve are arranged on the outlet of the pump. A fifth switch valve is arranged between the outlet of the pump and the second shell. A seventh switch valve is arranged on the second inlet. An eighth switch valve is arranged on the refrigerant inlet.

[0014] Preferably, a spiral outer fin is arranged in the jacket.

[0015] Preferably, a feeding port is arranged on the second shell. A stirring mechanism and a motor used for driving the stirring mechanism to rotate are arranged in the second shell.

[0016] Preferably, a liquid level meter and a sight glass are arranged on the second shell.

[0017] Preferably, a method for recycling high-pressure fluid energy to guide liquid cooling washing uses the above-mentioned unit for recycling high-pressure fluid energy to guide liquid cooling washing, and comprises the following steps:

[0018] The high-pressure solution in the generator is used for absorbing the gaseous refrigerant in the maintenance replacement gas of the absorption refrigerating unit by being introduced into the absorption assembly after being introduced into the absorption assembly through the second ejector to inject the low-pressure solution in the absorber and form a medium-pressure solution. The mixed solution enters the heat exchanger.

[0019] The high-pressure liquid refrigerant in the condenser is used to draw the low-pressure liquid refrigerant in the evaporator through the first ejector to form the medium-pressure liquid refrigerant, which is then introduced into the refrigerant cavity of the heat exchanger to lower the temperature of the mixed solution entering the heat exchanger together with the circulating water in the heat exchanger;

[0020] The medium-pressure liquid refrigerant is heated to become the medium-pressure gaseous refrigerant, which is introduced into the absorption assembly together with the circulating water as the cold source to absorb the heat generated when the medium-pressure solution absorbs the gaseous refrigerant in the maintenance replacement gas, and the medium-pressure gaseous refrigerant is heated again and absorbed by the medium-pressure solution.

[0021] The beneficial effects of the present application are:

[0022] 1. The medium-pressure solution and the medium-pressure liquid refrigerant are prepared by drawing the low-pressure liquid in the absorber and the evaporator through the high-pressure liquid in the generator and the condenser, respectively, and mixing, the gaseous refrigerant in the maintenance replacement gas of the unit is absorbed by the prepared medium-pressure solution, and the medium-pressure liquid refrigerant is used as the cold source of the absorption process, the medium-pressure liquid refrigerant is absorbed by the medium-pressure solution after being heated and vaporized, through the above operation, not only the problem of refrigerant loss during the maintenance replacement process of the unit can be solved, but also the energy contained in the solution and the liquid refrigerant can be fully utilized, which has important strategic significance for realizing the development goal of energy saving and emission reduction, low carbon and environmental protection, and energy efficient utilization;

[0023] 2. The present application can quickly realize the operation of guiding liquid, backfilling and liquid preparation and filling, greatly reducing the operation and maintenance cost, and being conducive to the long-term stable operation of the unit. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The unit schematic diagram for recycling high-pressure fluid energy for guiding liquid cooling and washing of the present application;

[0025] Figure 2 The absorption refrigeration unit and the first ejector connection structure schematic diagram of the present application;

[0026] Figure 3 The heat exchanger cross-sectional structure schematic diagram of the present application;

[0027] Figure 4 The second ejector and pump connection structure schematic diagram of the present application;

[0028] Figure 5 The absorption assembly cross-sectional structure schematic diagram of the present application.

[0029] In the figure: 1, generator; 2, absorber; 3, condenser; 4, evaporator; 5, first ejector; 6, second ejector; 7, first switch valve; 8, second switch valve; 9, third switch valve; 10, fourth switch valve; 11, fifth switch valve; 12, sixth switch valve; 13, seventh switch valve; 14, eighth switch valve; 15, pump; 16, heat exchanger; 161, first shell; 162, second shell; 163, partition; 164, heat exchange tube; 17, absorption cylinder; 18, jacket; 19, spiral inner coil; 20, air inlet distribution pipe; 21, spiral outer fin; 22, spray head; 23, scrubbing gas outlet; 24, liquid level gauge; 25, motor; 26, stirring mechanism; 27, feeding port; 28, sight glass. DETAILED DESCRIPTION

[0030] The following detailed description of the application is made with reference to the accompanying drawings, it is necessary to point out here that the following detailed description is only used to further illustrate the application, and cannot be understood as limiting the scope of protection of the application, and those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0031] Example 1

[0032] Please refer to Figure 1 and Figure 2 A unit for recycling high-pressure fluid energy for liquid-guiding cooling washing, comprising: a generator 1, an absorber 2, a condenser 3 and an evaporator 4, the four components constitute an absorption refrigeration unit.

[0033] It should be noted that the absorption refrigeration unit belongs to the existing equipment, which also includes pressure reducing valve, expansion valve and solution pump and other equipment, the connection relationship between each component also belongs to the prior art, which will not be described in detail.

[0034] Please refer to Figure 1 and Figure 2 The unit also includes a first ejector 5, a second ejector 6, a heat exchanger 16 and an absorption assembly; the outlet of the first ejector 5 is communicated with the heat exchanger 16, the outlet of the second ejector 6 is communicated with the absorption assembly, and the absorption assembly is communicated with the heat exchanger 16.

[0035] A method for recycling high-pressure fluid energy for liquid-guiding cooling washing, the specific steps are as follows:

[0036] The high-pressure solution in the generator 1 is used to induce the low-pressure solution in the absorber 2 through the second ejector 6, and after mixing to form a medium-pressure solution, it is introduced into the absorption assembly for absorbing the gaseous refrigerant in the maintenance replacement gas of the absorption refrigeration unit, and the mixed solution enters the heat exchanger 16;

[0037] The high-pressure liquid refrigerant in the condenser 3 is used to induce the low-pressure liquid refrigerant in the evaporator 4 through the first ejector 5, and the two are mixed to form medium-pressure liquid refrigerant, which is then introduced into the refrigerant cavity of the heat exchanger 16 to cool the mixed solution entering the heat exchanger 16 together with the circulating water in the heat exchanger 16;

[0038] The medium-pressure liquid refrigerant is heated and becomes medium-pressure gaseous refrigerant, which is introduced into the absorption assembly together with the circulating water as a cold source to absorb the heat generated when the medium-pressure solution absorbs the gaseous refrigerant in the maintenance replacement gas, and the medium-pressure gaseous refrigerant is heated again and is absorbed by the subsequent medium-pressure solution.

[0039] Embodiment 2

[0040] As a further optimized scheme of Embodiment 1, please refer to Figure 1 and Figure 3 The heat exchanger 16 comprises a second shell 162, two first shells 161 respectively arranged at two ends of the second shell 162, heat exchange tubes 164, and baffles 163; the heat exchange tubes 164 are a plurality of, and are arranged in the inner cavity of the second shell 162, and the two ends of the heat exchange tubes 164 respectively communicate with the inner cavities of the two first shells 161; the inner cavities of the two first shells 161 are both provided with the baffles 163, the baffles 163 divide the inner cavities of the first shells 161 into circulating water cavities and refrigerant cavities, the circulating water cavities and the refrigerant cavities are separated, and the circulating water cavities are located above the refrigerant cavities.

[0041] It should be noted that the first shell 161 is composed of a head, a tube box cylinder section, and a tube plate in sequence, and the second shell 162 is sequentially divided into a shell side left cylinder section, a left conical shell, a shell side middle cylinder section, a right conical shell, and a shell side right cylinder section from left to right.

[0042] In this embodiment, as a further optimized scheme, please refer to Figure 1 and Figure 5 The absorption assembly comprises an absorption cylinder 17, a spiral inner coil 19 arranged in the inner cavity of the absorption cylinder 17, and a jacket 18 sleeved on the outer sidewall of the absorption cylinder 17; the absorption cylinder 17 is vertically arranged on the top wall of the second shell 162, the inner cavity bottom of the absorption cylinder 17 communicates with the second shell 162, a first inlet is arranged above the right sidewall of the absorption cylinder 17, a second inlet is arranged below the left sidewall of the absorption cylinder 17, and a washing gas outlet 23 is arranged on the top of the absorption cylinder 17; a spray head 22 is arranged on the inner cavity top of the absorption cylinder 17, the spray head 22 communicates with the first inlet, an air inlet distribution pipe 20 is arranged on the inner cavity bottom of the absorption cylinder 17, the air inlet distribution pipe 20 communicates with the second inlet, and the spray head 22 and the air inlet distribution pipe 20 are respectively located on the upper and lower sides of the spiral inner coil 19.

[0043] Among them, please refer to Figure 1 , Figure 2 , Figure 3 ,Figure 4 and Figure 5 The outlet of the first ejector 5 is communicated with the inlet of the refrigerant cavity (i.e. the lower side of the left tube box cylinder section) through a pipeline, and the eighth switch valve 14 is arranged on the pipeline; the outlet of the second ejector 6 is communicated with the inlet of the pump 15 through a first pipeline, and the second switch valve 8 is arranged on the first pipeline; the first pipeline is communicated with the bottom of the inner cavity of the second shell 162 through a second pipeline, and the first switch valve 7 is arranged on the second pipeline; a third pipeline is arranged on the first pipeline in communication, and the third pipeline is communicated with the external tank car (for containing liquid refrigerant), and the third switch valve 9 is arranged on the third pipeline; the outlet of the pump 15 is communicated with the fourth pipeline and the fifth pipeline, the fourth pipeline is communicated with the first inlet, the fourth switch valve 10 is arranged on the fourth pipeline, the sixth switch valve 12 is arranged on the fifth pipeline, and the end of the fifth pipeline is used for connecting the liquid inlet of the absorption refrigeration unit; the sixth pipeline is communicated between the fifth pipeline and the bottom of the inner cavity of the second shell 162, and the fifth switch valve 11 is arranged on the sixth pipeline; the communication area of the sixth pipeline and the fifth pipeline is located upstream of the sixth switch valve 12; the seventh pipeline (for detecting the generated displacement gas injected into the inside of the absorption cylinder 17 through the seventh pipeline) is arranged on the second inlet in communication; the seventh switch valve 13 is arranged on the seventh pipeline; the outlet of the refrigerant cavity (i.e. the lower side of the right tube box cylinder section) is communicated with the inlet of the jacket 18 (which is located below the jacket 18), and the outlet of the jacket 18 (which is located above the jacket 18) is communicated with the second inlet; the inlet of the circulating water cavity (i.e. the upper side of the left tube box cylinder section) is communicated with the external circulating water, and the outlet of the circulating water cavity (i.e. the upper side of the right tube box cylinder section) is communicated with the spiral inner coil pipe 19.

[0044] In this embodiment, as a further optimized scheme, please refer to Figure 1 and Figure 5 The gap between the jacket 18 and the absorption cylinder 17 is provided with the spiral outer fin 21, and the spiral outer fin 21 is welded and fixed on the outer surface of the absorption cylinder 17.

[0045] In this embodiment, as a further optimized scheme, please refer to Figure 1 and Figure 3 The second shell 162 is provided with the feeding port 27, the bottom of the inner cavity of the second shell 162 is provided with the stirring mechanism 26, and the outer side of the second shell 162 is provided with the motor 25; the output shaft of the motor 25 is connected with the stirring mechanism 26, so as to drive the stirring mechanism 26 to rotate; and the stirring mechanism 26 comprises a connecting shaft and an auger.

[0046] It should be noted that the feeding port 27 is arranged on the top of the left conic shell of the second shell 162.

[0047] In this embodiment, as a further optimized scheme, please refer to Figure 1 and Figure 3The middle cylinder section of the second shell 162 is provided with a liquid level meter 24, and the lower middle section of the right cylinder section of the second shell 162 is provided with a sight glass 28.

[0048] It should be noted that the unit for recovering high-pressure fluid energy for liquid-guiding cooling and washing can be used for absorbing refrigeration unit maintenance liquid-guiding cooling, replacement gas washing, recharging and liquid distribution charging.

[0049] (1) The liquid-guiding cooling and replacement gas washing work as follows:

[0050] Only the first switch valve 7, the second switch valve 8, the fourth switch valve 10, the seventh switch valve 13 and the eighth switch valve 14 are opened (other switch valves are closed), the high-pressure solution stored in the generator 1 is used to induce the low-pressure solution stored in the absorber 2 through the second ejector 6, and becomes a medium-pressure solution, which is sent to the spray head 22 of the absorption cylinder 17 through the second switch valve 8, the pump 15 and the fourth switch valve 10, and is sprayed on the outer surface of the spiral inner coil 19 through the spray head 22 to form a liquid film, which flows downward by gravity;

[0051] The maintenance replacement gas from the absorbing refrigeration unit enters the absorption cylinder 17 through the seventh switch valve 13 and the gas distribution pipe 20, flows upward in the absorption cylinder 17, and is in countercurrent contact with the medium-pressure solution flowing downward, so that the gaseous refrigerant in the maintenance replacement gas is absorbed, and the remaining maintenance replacement gas is discharged from the washing gas outlet 23, and the solution absorbing the gaseous refrigerant enters the second shell 162 of the heat exchanger 16; part of the heat released during the absorption process is taken away by the circulating water in the spiral inner coil 19, and the other part of the heat released during the absorption process is taken away by the medium-pressure gaseous refrigerant in the jacket 18;

[0052] The high-pressure liquid refrigerant stored in the condenser 3 is used to induce the low-pressure liquid refrigerant stored in the evaporator 4 through the first ejector 5, and becomes a medium-pressure liquid refrigerant, which enters the refrigerant cavity of the heat exchanger 16 and is introduced into the lower heat exchange pipe 164, and the circulating water outside is injected into the upper heat exchange pipe 164 through the circulating water cavity of the heat exchanger 16; the solution formed after the above absorption (medium-pressure solution absorbing gaseous refrigerant) falls into the second shell 162 of the heat exchanger 16 to form a certain liquid level to immerse the upper and lower heat exchange pipes 164, and exchange heat with the medium (circulating water, medium-pressure liquid refrigerant) therein, so that the solution is cooled, and at this time, the stirring mechanism 26 can be driven to rotate by the motor 25 to enhance the heat exchange effect;

[0053] The part of solution in the second shell 162 enters the pump 15 through the first switch valve 7 to participate in the circulating flow absorption again; the medium-pressure liquid refrigerant in the lower side heat exchange pipe 164 is gasified into medium-pressure gaseous refrigerant after absorbing the heat of the solution, enters the jacket 18, absorbs the heat released in the absorption cylinder 17 again under the disturbance of the spiral outer fin 21, and then is led out from the upper outlet of the jacket 18 and enters the absorption cylinder 17 through the air inlet distribution pipe 20 to be absorbed by the circulating solution.

[0054] (2) The recharging operation is as follows: only the first switch valve 7 and the sixth switch valve 12 are opened, the solution in the second shell 162 is pumped by the pump 15 through the first switch valve 7, and then is delivered to the absorption refrigeration unit through the sixth switch valve 12.

[0055] (3) The solution preparation and charging operation is as follows:

[0056] The solid powder (potassium chromate, sodium iodide and potassium hydroxide) is put into the second shell 162 through the feeding port 27 on the left conical shell. Since the cross-sectional diameter of the left conical shell where the feeding port 27 is located is larger than the diameter of the pipe bundle, the powder falls into the inner cavity bottom of the second shell 162 through the gap on both sides, is pushed by the rotation of the auger to be uniformly distributed on the bottom of the shell, and whether the powder reaches the preset position is observed through the sight glass 28.

[0057] Only the third switch valve 9 and the fourth switch valve 10 are opened, the liquid refrigerant (which is supplemented from outside) in the tank car is pumped by the pump 15 through the third switch valve 9, and then sequentially passes through the fourth switch valve 10 and the absorption cylinder 17 to enter the second shell 162. Whether the liquid level reaches the preset height is observed through the liquid level meter 24, and the liquid refrigerant dissolves the solid powder under the rotation of the auger. The heat released in the dissolving process is taken away by the circulating water in the upper side heat exchange pipe 164.

[0058] When the dissolving is completed (after becoming the TC working fluid liquid, the charging to the absorption refrigeration unit is completed, and the operation is started), only the first switch valve 7 and the sixth switch valve 12 are opened, the solution in the second shell 162 is pumped by the pump 15 through the first switch valve 7, and then is delivered to the absorption refrigeration unit through the sixth switch valve 12.

[0059] It should be noted that the solution preparation and charging operation refers to the operation of charging the solution to the absorption refrigeration unit for the first time or supplementing the solution to the unit during maintenance. The operation needs to be completed on site. The solution in the absorption refrigeration unit is formed by dissolving the solid powder in the liquid refrigerant (such as liquid ammonia), and needs to be prepared on site and charged to the absorption refrigeration unit (the conventional operation needs to be completed by a separate stirring solution preparation kettle).

[0060] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the protection scope of the present application.

Claims

1. A unit for recovering high-pressure fluid energy for liquid cooling and washing, comprising: The generator (1), absorber (2), condenser (3) and evaporator (4) are characterized in that the unit further includes a first ejector (5), a second ejector (6), a heat exchanger (16) and an absorption assembly; The second ejector (6) is used to eject the low-pressure solution in the absorber (2) using the high-pressure solution in the generator (1) and make it into a medium-pressure solution. The first ejector (5) is used to eject the low-pressure liquid refrigerant in the evaporator (4) using the high-pressure liquid refrigerant in the condenser (3) and make it into a medium-pressure liquid refrigerant. The absorption assembly uses the medium-pressure solution to absorb the gaseous refrigerant in the unit maintenance replacement gas. The heat exchanger (16) is used to absorb the heat of the solution discharged from the absorption assembly using circulating water and medium-pressure liquid refrigerant. The heat exchanger (16) includes a second shell (162), two first shells (161) respectively disposed at both ends of the second shell (162), a heat exchange tube (164) disposed in the second shell (162) and used to connect the two first shells (161), and a partition (163) disposed in the first shell (161). The partition (163) is used to divide the inner cavity of the first housing (161) into a circulating water cavity and a refrigerant cavity; The absorption assembly includes an absorption cylinder (17) communicating with the top of the second housing (162), a spiral inner coil (19) disposed inside the absorption cylinder (17), and a jacket (18) disposed outside the absorption cylinder (17). The absorption cylinder (17) has a first inlet and a second inlet on its upper and lower sides respectively, and a washing gas outlet (23) is provided above the absorption cylinder (17).

2. The unit for recovering high-pressure fluid energy for liquid cooling and washing according to claim 1, characterized in that, The outlet of the first ejector (5) is connected to the inlet of the refrigerant chamber, the outlet of the second ejector (6) is connected to the first inlet through the pump (15), the outlet of the refrigerant chamber is connected to the inlet of the jacket (18), the outlet of the jacket (18) is connected to the second inlet, and the outlet of the circulating water chamber is connected to the spiral inner coil (19).

3. The unit for recovering high-pressure fluid energy for liquid cooling and washing according to claim 2, characterized in that, The top of the inner cavity of the absorption cylinder (17) is provided with a nozzle (22) that communicates with the first inlet, and the bottom of the inner cavity of the absorption cylinder (17) is provided with an air inlet distribution pipe (20) that communicates with the second inlet.

4. The unit for recovering high-pressure fluid energy for liquid cooling and washing according to claim 3, characterized in that, The bottom of the second housing (162) is connected to the inlet of the pump (15) through a pipe. A first switching valve (7) is provided on the pipe. A second switching valve (8) is provided at the outlet of the second ejector (6). A third switching valve (9) is provided at the inlet of the pump (15). A fourth switching valve (10) and a sixth switching valve (12) are provided at the outlet of the pump (15). A fifth switching valve (11) is provided between the outlet of the pump (15) and the second housing (162). A seventh switching valve (13) is provided at the second inlet. An eighth switching valve (14) is provided at the refrigerant inlet.

5. The unit for recovering high-pressure fluid energy for liquid cooling and washing according to claim 1, characterized in that, The jacket (18) is provided with spiral outer fins (21).

6. The unit for recovering high-pressure fluid energy for liquid cooling and washing according to claim 1, characterized in that, The second housing (162) is provided with a feeding port (27), and the second housing (162) is provided with a stirring mechanism (26) and a motor (25) for driving the stirring mechanism (26) to rotate.

7. The unit for recovering high-pressure fluid energy for liquid cooling and washing according to claim 1, characterized in that, The second housing (162) is provided with a level gauge (24) and a sight glass (28).

8. A method for recovering high-pressure fluid energy for liquid cooling and washing, utilizing a unit for recovering high-pressure fluid energy for liquid cooling and washing as described in any one of claims 1-7, characterized in that, Includes the following steps: The high-pressure solution in the generator (1) is ejected by the second ejector (6) to the low-pressure solution in the absorber (2) and form a medium-pressure solution. It is then introduced into the absorption assembly to absorb the gaseous refrigerant in the maintenance replacement gas of the absorption chiller unit. The mixed solution enters the heat exchanger (16). The high-pressure liquid refrigerant in the condenser (3) is ejected by the first ejector (5) to eject the low-pressure liquid refrigerant in the evaporator (4) and form a medium-pressure liquid refrigerant. Then it is introduced into the refrigerant chamber of the heat exchanger (16) and together with the circulating water in the heat exchanger (16), it cools the mixed solution entering the heat exchanger (16). After absorbing heat, the medium-pressure liquid refrigerant becomes a medium-pressure gaseous refrigerant and, together with the circulating water, is introduced into the absorption assembly as a cold source. The medium-pressure solution absorbs the heat generated during the maintenance and replacement of the gaseous refrigerant in the gas, and the medium-pressure gaseous refrigerant, after being heated again, is absorbed by the medium-pressure solution.

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