Unit and process for recovering high-pressure fluid energy for liquid guiding, cooling and washing

Abstract

The invention discloses a unit and process for recovering high-pressure fluid energy for liquid guiding, cooling and washing in the technical field of absorption refrigeration. The unit 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 liquids in the generator and the condenser respectively eject low-pressure liquids in the absorber and the evaporator, the low-pressure liquids are mixed to prepare a medium-pressure solution and a medium-pressure liquid refrigerant, the prepared medium-pressure solution is used for absorbing a gaseous refrigerant in unit maintenance replacement gas, and 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 absorbing heat and being gasified, through the operation, the problem of refrigerant loss in the unit maintenance and replacement process can be solved, energy contained in the solution and the liquid refrigerant can be fully utilized, and the development goals of energy conservation, emission reduction, low carbon, environmental protection and efficient energy utilization are achieved. The method 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 recycling 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. The above refrigeration unit often needs to discharge the medium in the unit to provide the condition for maintenance during maintenance. During actual maintenance, 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 be discharged 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. In addition, the solution in the unit is divided into high-pressure solution and low-pressure solution, which are stored in the generator and the 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 the 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

[0003] The purpose of the present application is to provide a unit and process for recycling 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.

[0004] The present application achieves the above-mentioned purpose by the following technical scheme: a unit for recycling 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. 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.

[0005] Preferably, the heat exchanger comprises a second shell, two first shells respectively arranged at two ends of the second shell, a heat exchange pipe arranged in the second shell and used for connecting the two first shells, and a partition plate arranged in the first shell; The partition plate is used for dividing the inner cavity of the first shell into a circulating water cavity and a refrigerant cavity.

[0006] 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. The upper and lower sides of the side wall of the absorption cylinder are respectively provided with a first inlet and a second inlet. The upper side of the absorption cylinder is provided with a scrubbing gas outlet.

[0007] 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.

[0008] Preferably, the inner cavity of the absorption cylinder is provided with a spray head communicated with the first inlet at the top, and an air inlet distribution pipe communicated with the second inlet at the bottom.

[0009] Preferably, the bottom of the second shell is communicated with the inlet of the pump through a pipeline, the pipeline is provided with a first switch valve, the outlet of the second ejector is provided with a second switch valve, the inlet of the pump is provided with a third switch valve, the outlet of the pump is provided with a fourth switch valve and a sixth switch valve, a fifth switch valve is arranged between the outlet of the pump and the second shell, the second inlet is provided with a seventh switch valve, and the refrigerant inlet is provided with an eighth switch valve.

[0010] Preferably, the jacket is provided with a spiral outer fin.

[0011] Preferably, the second shell is provided with a feeding port, and the second shell is provided with a stirring mechanism and a motor used for driving the stirring mechanism to rotate.

[0012] Preferably, the second shell is provided with a liquid level meter and a sight glass.

[0013] Preferably, a method for recycling high-pressure fluid energy for liquid-guiding and cooling washing uses the above-mentioned unit for recycling high-pressure fluid energy for liquid-guiding and cooling washing, and comprises the following steps: The high-pressure solution in the generator is introduced into the absorption assembly after being introduced into the absorber by the second ejector to absorb the gaseous refrigerant in the maintenance and replacement gas of the absorption refrigeration unit, and the mixed solution enters the heat exchanger; 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 cool the mixed solution entering the heat exchanger together with the circulating water in the heat exchanger; 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.

[0014] The present application has the following advantages: 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, the problem of refrigerant loss during the maintenance replacement process of the unit can be solved, and the energy contained in the solution and the liquid refrigerant can be fully utilized, which has important strategic significance for achieving the development goals of energy saving and emission reduction, low carbon and environmental protection, and energy efficient utilization; 2. The present application can quickly realize the operation of guiding liquid, backfilling and liquid preparation, greatly reducing the operation and maintenance cost, and being conducive to the long-term stable operation of the unit. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The unit schematic diagram for recycling high-pressure fluid energy for guiding liquid cooling and washing of the present application; Figure 2 The absorption refrigeration unit and the first ejector connection structure schematic diagram of the present application; Figure 3 The heat exchanger cross-sectional structure schematic diagram of the present application; Figure 4 The second ejector and pump connection structure schematic diagram of the present application; Figure 5 The absorption assembly cross-sectional structure schematic diagram of the present application.

[0016] 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

[0017] The application will be further described in detail below 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.

[0018] Example 1

[0019] 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.

[0020] It should be noted that the absorption refrigeration unit belongs to the existing equipment, which also includes a pressure reducing valve, an expansion valve and a solution pump and other equipment, and the connection relationship between the components also belongs to the prior art, which will not be described in detail.

[0021] Please refer to Figure 1 and Figure 2 The unit also comprises 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.

[0022] A method for recycling high-pressure fluid energy for liquid-guiding cooling washing, the specific steps are as follows: 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; 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; 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.

[0023] Embodiment 2

[0024] As a further optimized solution 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.

[0025] 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.

[0026] In this embodiment, as a further optimized solution, 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. Among them, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The 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); 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, and the fourth switch valve 10 is arranged on the fourth pipeline; the sixth switch valve 12 is arranged on the fifth pipeline, and the terminal 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 (the inlet is located below the jacket 18), and the outlet of the jacket 18 (the outlet 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.

[0027] In the 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.

[0028] In the 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; the stirring mechanism 26 comprises a connecting shaft and an auger.

[0029] It should be noted that the feeding port 27 is arranged on the top of the left conic shell of the second shell 162.

[0030] In the embodiment, as a further optimized scheme, please refer to Figure 1 and Figure 3 The middle cylinder section of the second shell 162 is provided with the liquid level meter 24, and the middle lower part of the right cylinder section of the second shell 162 is provided with the sight glass 28.

[0031] It should be noted that the unit for recovering high-pressure fluid energy for liquid guide cooling washing can be used for absorbing refrigeration unit maintenance liquid guide cooling, replacement gas washing, backfilling and liquid preparation filling; (1) The liquid guide cooling and replacement gas washing works as follows: 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, sprayed on the outer surface of the spiral inner coil pipe 19 through the spray head 22 to form a liquid film, and flows downward by gravity; 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 forms 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 in the absorption process is taken away by the circulating water in the spiral inner coil pipe 19, and the other part of the heat released in the absorption process is taken away by the medium-pressure gaseous refrigerant in the jacket 18; 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; Part of the solution in the second shell 162 enters the pump 15 through the first switch valve 7 to participate in the circulation and absorption again; the medium-pressure liquid refrigerant in the lower 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 from the absorption cylinder 17 again under the disturbance of the spiral outer fin 21, and is then introduced from the outlet at the upper part of the jacket 18 and enters the absorption cylinder 17 through the gas distribution pipe 20 to be absorbed by the circulating solution; the circulating water in the upper heat exchange pipe 164 is introduced into the spiral inner coil pipe 19 after being heated.

[0032] (2) The backfilling 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 after being pressurized through the first switch valve 7, and then is delivered to the absorption type refrigeration unit through the sixth switch valve 12.

[0033] (3) The solution preparation and filling operation is as follows: The solid powder (potassium chromate, sodium iodide and potassium hydroxide) is poured into the second shell 162 through the pouring port 27 on the left conical shell. Since the cross-sectional diameter of the left conical shell where the pouring port 27 is located is larger than the diameter of the cross-sectional circle of the tube bundle, the powder falls into the bottom of the inner cavity of the second shell 162 through the gap on both sides, and is uniformly distributed on the bottom of the shell through the rotation of the auger. Whether the powder reaches the preset position is observed through the sight glass 28. Only the third switch valve 9 and the fourth switch valve 10 are opened, the liquid refrigerant (the liquid refrigerant is supplemented from outside) in the tank car is pumped by the pump 15 after being pressurized through the third switch valve 9, and then sequentially passes through the fourth switch valve 10 and the absorption cylinder 17, and enters the second shell 162. Whether the liquid level reaches the preset height is observed through the liquid level meter 24. Under the rotation of the auger, the liquid refrigerant dissolves the solid powder, and the heat released during the dissolution process is taken away by the circulating water in the upper heat exchange pipe 164. When the dissolution is completed (after becoming TC working fluid liquid, filling into the absorption type refrigeration unit, and starting operation), 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 after being pressurized through the first switch valve 7, and then is delivered to the absorption type refrigeration unit through the sixth switch valve 12.

[0034] It should be noted that the solution preparation and filling operation refers to the operation of filling the solution into the absorption type refrigeration unit for the first time or supplementing the solution into the unit during maintenance. The operation needs to be completed on site. The solution in the absorption type refrigeration unit is formed by dissolving the solid powder in the liquid refrigerant (such as liquid ammonia), and needs to be prepared and filled into the absorption type refrigeration unit on site (the conventional operation needs to be completed separately by using a stirring solution preparation kettle).

[0035] The above-described embodiments only express several embodiments of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the 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, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A unit for recovering high pressure fluid energy for use in a liquid guided cooling wash, comprising: Generator (1), absorber (2), condenser (3) and evaporator (4), characterized in that the unit further comprises a first ejector (5), a second ejector (6), a heat exchanger (16) and an absorption assembly; The second ejector (6) is used to use the high-pressure solution in the generator (1) to inject the low-pressure solution in the absorber (2) and make a medium-pressure solution, the first ejector (5) is used to use the high-pressure liquid refrigerant in the condenser (3) to inject the low-pressure liquid refrigerant in the evaporator (4) and make a medium-pressure liquid refrigerant, the absorption assembly uses the medium-pressure solution to absorb the gaseous refrigerant in the unit maintenance replacement air, and the heat exchanger (16) is used to absorb the heat of the solution discharged by the absorption assembly by circulating water and medium-pressure liquid refrigerant.

2. A machine set for recovering energy of high pressure fluid for liquid conducting and cooling washing according to claim 1, characterized in that, 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 pipes (164) arranged in the second shell (162) and used for communicating the two first shells (161), and a partition plate (163) arranged in the first shell (161). The partition plate (163) is used to divide the inner cavity of the first shell (161) into a circulating water cavity and a refrigerant cavity.

3. A machine group for recovering the energy of high-pressure fluids for the purpose of liquid-guiding and cooling washing according to claim 2, characterized in that, The absorption assembly comprises an absorption cylinder (17) in communication with the top of the second shell (162), a spiral inner coil (19) arranged in the absorption cylinder (17), and a jacket (18) arranged outside the absorption cylinder (17). The upper and lower sides of the side wall of the absorption cylinder (17) are respectively provided with a first inlet and a second inlet, and the upper side of the absorption cylinder (17) is provided with a washing gas outlet (23).

4. A machine group for recovering the energy of high-pressure fluids for the purpose of liquid-guiding and cooling washing according to claim 3, characterized in that, The outlet of the first ejector (5) is in communication with the inlet of the refrigerant cavity, the outlet of the second ejector (6) is in communication with the first inlet through the pump (15), the outlet of the refrigerant cavity is in communication with the inlet of the jacket (18), the outlet of the jacket (18) is in communication with the second inlet, and the outlet of the circulating water cavity is in communication with the spiral inner coil (19).

5. A machine group for recovering the energy of high-pressure fluids for the purpose of hydronic cooling washing according to claim 4, characterized in that, The inner cavity of the absorption cylinder (17) is provided with a spray head (22) in communication with the first inlet, and the inner cavity of the absorption cylinder (17) is provided with an air inlet distribution pipe (20) in communication with the second inlet.

6. A machine group for recovering the energy of high-pressure fluids for the purpose of liquid-guiding and cooling washing according to claim 5, characterized in that, The bottom of the second shell (162) is in communication with the inlet of the pump (15) through a pipeline, a first switch valve (7) is arranged on the pipeline, a second switch valve (8) is arranged on the outlet of the second ejector (6), a third switch valve (9) is arranged on the inlet of the pump (15), a fourth switch valve (10) and a sixth switch valve (12) are arranged on the outlet of the pump (15), a fifth switch valve (11) is arranged between the outlet of the pump (15) and the second shell (162), a seventh switch valve (13) is arranged on the second inlet, and an eighth switch valve (14) is arranged on the refrigerant inlet.

7. A machine set for recovering energy from high pressure fluid for liquid guided cooling and washing according to claim 3, characterized in that, The jacket (18) is provided with a spiral outer fin (21).

8. A machine set for recovering energy from high pressure fluid for liquid guided cooling and washing according to claim 2, characterized in that, The second shell (162) is provided with a feeding port (27), and the second shell (162) is provided with a stirring mechanism (26) and a motor (25) for driving the stirring mechanism (26) to rotate.

9. A machine set for recovering energy from high pressure fluid for liquid guided cooling washing according to claim 2, characterized in that, The second shell (162) is provided with a liquid level gauge (24) and a sight glass (28).

10. A method for recovering high pressure fluid energy for use in a liquid guided cooling washing process, using a unit for recovering high pressure fluid energy for use in a liquid guided cooling washing process according to any one of claims 1-9, characterized in that, The method comprises the following steps: The high-pressure solution in the generator (1) is introduced into the absorption assembly after being used to absorb the gaseous refrigerant in the replacement air for maintenance of the absorption refrigerating unit by being used to absorb the low-pressure solution in the absorber (2) through the second ejector (6) and forming a medium-pressure solution, and the mixed solution enters the heat exchanger (16); The high-pressure liquid refrigerant in the condenser (3) is introduced into the refrigerant cavity of the heat exchanger (16) after being used to cool the mixed solution entering the heat exchanger (16) together with the circulating water in the heat exchanger (16) by being used to absorb the low-pressure liquid refrigerant in the evaporator (4) through the first ejector (5) and forming a medium-pressure liquid refrigerant; The medium-pressure liquid refrigerant is heated to become a medium-pressure gaseous refrigerant, and the circulating water is used as a cold source to be introduced into the absorption assembly, so as to absorb the heat generated when the medium-pressure solution absorbs the gaseous refrigerant in the replacement air for maintenance, and the medium-pressure gaseous refrigerant is heated again and is absorbed by the medium-pressure solution.

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