Supercritical carbon dioxide jet cleaning device

Abstract

The utility model relates to the technical field of jet cleaning devices, in particular to a supercritical carbon dioxide jet cleaning device. Comprising a tank body, a sealing cover is arranged at the top of the tank body, a first flushing pipeline is arranged in the tank body, and a plurality of first nozzles are arranged on the first flushing pipeline; a storage plate capable of moving up and down is arranged in the tank body, at least two clamping pieces are arranged on the storage plate, a through hole is formed in the middle of the storage plate, a second flushing pipeline is arranged in the through hole, a plurality of second nozzles are arranged on the second flushing pipeline, and the second nozzles are communicated with the storage plate. And the first flushing pipeline and the second flushing pipeline are respectively connected with a carbon dioxide storage tank through pipelines. The jet flow cleaning device can thoroughly clean the outer portion and the inner portion of a hollow structure object with an opening, and cleaning dead corners are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of jet cleaning devices, in particular to a supercritical carbon dioxide jet cleaning device. Background Art

[0002] Cleaning is an essential link in industrial production. At present, industrial cleaning mainly uses organic solvent cleaning and aqueous solution cleaning. Organic solvents are mainly volatile solvents (VOCs) and halogen-containing chlorofluorocarbon (CFC) solvents, which are likely to cause damage to the ozone layer. Aqueous solution cleaning requires complex surfactant formulations, has a long drying time, the treated metals are prone to rust, and it will form secondary pollution, and inevitably increases equipment and treatment costs. Therefore, it has become an urgent task to research and develop environmentally friendly cleaning agents and cleaning methods.

[0003] Supercritical CO 2 is a cleaning agent that can replace VOCs and CFCs and has certain advantages. Supercritical CO 2 has a certain solubility in organic substances, stable performance, low viscosity, high diffusivity, low surface tension, good wettability, and does not require drying after cleaning and has no residue.

[0004] Supercritical CO 2 The cleaning process flow is as Figure 1 shown. The main equipment, the jet cleaning tank, is a high-pressure device. Its operating pressure is generally 10 - 25 MPa, and its operating temperature is generally 40 - 80 °C. The top cover of the cleaning tank can be opened. The object to be cleaned is usually placed in a basket and put into the cleaning tank through the top cover. The liquid CO 2 flowing out of the CO 2 storage tank is pressurized and heated by a high-pressure pump and a heater to reach the specified operating pressure and operating temperature, becoming a supercritical fluid and then entering the cleaning tank; the supercritical CO 2 fully contacts the object to be cleaned in the basket of the cleaning tank. The pollutants on the surface of the object to be cleaned are peeled off through the penetration, dissolution, etc. of the supercritical CO 2 ; the mixture of the supercritical CO 2 and the pollutants is appropriately depressurized through a pressure reducing valve and then separated in a separation tank; the pure gaseous CO 2 separated by depressurization is condensed into liquid CO 2 by a cooler and then enters the inlet of the high-pressure pump for recycling, and the pollutants are discharged from the bottom of the separation tank.

[0005] When the existing supercritical carbon dioxide jet cleaning tank is used for cleaning, the object to be cleaned is directly placed in the basket. For a hollow-structured object with an opening, only the outside can be cleaned during cleaning, and the inside still cannot be thoroughly cleaned after multiple cleanings, and there are still cleaning dead corners. Therefore, the present utility model is proposed. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide a supercritical carbon dioxide jet cleaning device, which can thoroughly clean the interior of a hollow structure object with an opening, avoiding cleaning dead corners.

[0007] The present utility model provides a supercritical carbon dioxide jet cleaning device, including a tank body. A sealing cover is provided at the top of the tank body. A first flushing pipeline is provided inside the tank body, and a plurality of first nozzles are provided on the first flushing pipeline. A movable placing plate is provided inside the tank body. At least two clamping members are provided on the placing plate. A through hole is provided in the middle of the placing plate, and a second flushing pipeline is provided in the through hole. A plurality of second nozzles are provided on the second flushing pipeline. The first flushing pipeline and the second flushing pipeline are respectively connected to a carbon dioxide storage tank through pipelines.

[0008] Further, connecting plates are symmetrically provided at both ends of the placing plate. Fixed rods are provided at the tops of the connecting plates. The tops of the fixed rods penetrate through the top wall of the tank body and are connected to a first telescopic rod. The first telescopic rod is located at the top of the tank body.

[0009] Further, the placing plate is made of a grid plate, and a mounting plate is fixed on the top of the placing plate. The clamping members are provided on the mounting plate.

[0010] Further, the clamping member includes a support plate. A second telescopic rod is provided on the upper part of the support plate. A detachable clamping plate is provided at the end of the second telescopic rod away from the support plate.

[0011] Further, a number of positioning beads are provided at the end of the second telescopic rod away from the support plate. A connecting pipe is fixed on the side wall of the clamping plate. A number of positioning holes corresponding to the positioning beads are provided on the connecting pipe. The positioning beads pop into the positioning holes.

[0012] Further, a reinforcement ring is sleeved outside the second telescopic rod. The reinforcement ring is threadedly connected to the second telescopic rod and the connecting pipe respectively.

[0013] Further, an opening is provided at the top of the tank body. One side of the sealing cover is hinged to the opening.

[0014] Further, a chute is provided on the top of the sealing cover. A sliding rod is fixed in the chute. An L-shaped limiting block that can slide along the chute is provided on the sliding rod. A clamping groove is provided on one side wall of the opening. One end of the horizontal section of the L-shaped limiting block can penetrate through the sealing cover and extend into the clamping groove.

[0015] Further, a spring is sleeved on the sliding rod. One end of the spring is fixed to the vertical section of the L-shaped limiting block, and the other end of the spring is fixedly connected to the side wall of the sliding groove.

[0016] Further, a sewage discharge pipe is provided at the bottom of the tank body, and a control valve is provided on the sewage discharge pipe.

[0017] In summary, compared with the prior art, the present utility model has the following advantages:

[0018] The technical solution of the present utility model clamps the object to be cleaned by arranging a clamping member on the placing plate, and uses the supercritical carbon dioxide fluid sprayed by the first nozzle on the first flushing pipeline to clean the outside of the object. When cleaning an object with an open hollow structure, align the opening of the object with the through hole on the placing plate, and use the supercritical carbon dioxide fluid sprayed by the second nozzle on the second flushing pipeline to clean the inside of the object, so as to thoroughly clean the inside and outside of the object with an open hollow structure, and there is no cleaning dead angle. Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a process flow chart of the supercritical carbon dioxide cleaning process in the prior art;

[0021] Figure 2 It is a schematic structural diagram of the jet cleaning device in Embodiment 1 of the present utility model;

[0022] Figure 3 It is a sectional view of the jet cleaning device in Embodiment 1 of the present utility model;

[0023] Figure 4 It is a schematic structural diagram of the placing plate and the second flushing pipeline in Embodiment 1 of the present utility model;

[0024] Figure 5 It is a sectional view of the connection between the second telescopic rod and the connecting pipe in Embodiment 2 of the present utility model;

[0025] Figure 6 It is a schematic structural diagram of the sealing cover in Embodiment 3 of the present utility model;

[0026] Figure 7 It is a sectional view of the sealing cover in Embodiment 3 of the present utility model;

[0027] Figure 8 This is a sectional view of the jet cleaning device in Embodiment 3 of the present utility model.

[0028] Explanation of reference numerals: 1 - tank body; 101 - opening; 102 - sewage discharge pipe; 103 - support leg; 104 - clamping groove; 2 - sealing cover; 201 - sliding groove; 202 - sliding rod; 203 - L-shaped limiting block; 204 - through groove; 205 - spring; 206 - handle; 3 - storage plate; 301 - through hole; 302 - mounting plate; 3021 - groove; 303 - connecting plate; 304 - sewage discharge hole; 4 - first flushing pipeline; 401 - first spray head; 5 - second flushing pipeline; 501 - second spray head; 502 - cross beam; 6 - fixing rod; 7 - connecting block; 8 - first telescopic rod; 9 - clamping member; 901 - support plate; 902 - second telescopic rod; 903 - clamping plate; 904 - connecting pipe; 905 - positioning bead; 906 - positioning hole; 907 - reinforcing ring; 908 - first external thread; 909 - second external thread. Detailed implementation manners

[0029] Next, the technical solutions of the present utility model will be described clearly and completely in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined. In addition, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] Embodiment 1

[0033] A supercritical carbon dioxide jet cleaning device, as Figure 2 and Figure 3 shown, includes a tank body 1. An opening 101 is provided on the top wall of the tank body 1. A sealing cover 2 is hinged at the opening 101. A first flushing pipeline 4 is provided on the inner wall of the tank body 1. A plurality of first nozzles 401 are provided on the first flushing pipeline 4. A movable placing plate 3 is provided inside the tank body 1. At least two clamping members 9 are installed on the placing plate 3. A through hole 301 is provided in the middle of the placing plate 3. A second flushing pipeline 5 is provided in the through hole 301. A plurality of second nozzles 501 are installed on the second flushing pipeline 5. The CO 2 storage tank is connected to the first flushing pipeline 4 and the second flushing pipeline 5 respectively by means of existing technology. Pipes. The pipes connecting the CO 2 storage tank to the first flushing pipeline 4 and the second flushing pipeline 5 are provided with a booster pump and a heater. The liquid CO 2 flowing out of the storage tank 2 is pressurized and heated by a high-pressure pump and a heater to reach the specified operating pressure and operating temperature, becoming a supercritical fluid and then entering the first flushing pipeline 4 and the second flushing pipeline 5.

[0034] The upper part of the tank body 1 is cylindrical and the bottom is conical. A sewage discharge pipe 102 is provided at the bottom. A control valve is installed on the sewage discharge pipe 102. The sewage discharge pipe 102 is connected to a separation tank through a pipeline. Four legs 103 are fixed at the bottom of the tank body 1. A plurality of first flushing pipelines 4 that communicate with each other are evenly arranged along the circumferential direction inside the tank body 1. The first flushing pipeline 4 is provided with a plurality of first nozzles 401 along the vertical direction.

[0035] As Figure 4As shown in the figure, a connecting plate 303 is fixedly installed at each end of the storage plate 3. The two connecting plates 303 are symmetrically arranged. A fixing rod 6 is installed on the tops of the two connecting plates 303. The top of the fixing rod 6 passes through the top wall of the tank body 1 and extends outside the tank body 1. Two first telescopic rods 8 are symmetrically installed on the top of the tank body 1. The first telescopic rod 8 is an electric telescopic rod. The base of the electric telescopic rod is fixed on the top of the tank body 1. A connecting block 7 is fixed on the last rod body of the electric telescopic rod. The top of the fixing rod 6 is fixed to the bottom of the connecting block 7. By the telescopic movement of the first telescopic rod 8, the fixing rod 6 moves up and down, so that the storage plate 3 can move up and down inside the tank body 1. Sliders can be arranged on the side wall of the storage plate 3, and chutes can be arranged on the inner wall of the tank body 1, so that the storage plate 3 moves vertically along the chute, and at the same time, a limiting effect is exerted on the storage plate 3 to prevent the storage plate 3 from shaking during flushing.

[0036] In this embodiment, the storage plate 3 is made of a grid plate, which is convenient for the waste liquid to directly flow into the bottom of the tank body 1 from the grids of the grid plate during cleaning. A through hole 301 is provided in the middle of the storage plate 3. Two mounting plates 302 are symmetrically fixed on both sides of the through hole 301. A plurality of sewage discharge holes 304 are provided on the mounting plates 302. A clamping member 9 is installed on the top of the mounting plate 302. The two clamping members 9 are arranged opposite to each other. The clamping member 9 includes a support plate 901. The bottom of the support plate 901 is fixed to the mounting plate 302. A second telescopic rod 902 is fixed on the upper part of the support plate 901. A clamping plate 903 is provided at one end of the second telescopic rod 902 away from the support plate 901. The clamping plate 903 is detachably connected to the second telescopic rod 902. A groove 3021 is provided on the top of the mounting plate 302. During installation, the bottom of the clamping plate 903 fits with the bottom wall and the side wall of the groove 3021, which plays a supporting role for the clamping plate 903. At the same time, a plurality of sewage discharge holes 304 are provided on the bottom wall of the groove 3021.

[0037] The size of the opening 101 should be as large as possible, so that when the storage plate 3 is raised, the two clamping members 9 can pass through the opening 101 and extend outside the tank body 1, which is convenient for placing the objects to be cleaned.

[0038] In this embodiment, a threaded groove is provided on the side wall of the clamping plate 903, and an external thread is provided at the end of the second telescopic rod 902. The clamping plate 903 is threadedly connected to the second telescopic rod 902. The second telescopic rod 902 is also an electric telescopic rod. The base of the electric telescopic rod is fixed to the support plate 901. During processing and manufacturing, the clamping plate 903 can be designed in various shapes, such as arc-shaped or square-shaped, which is convenient for clamping objects of different shapes such as cylindrical and square-shaped.

[0039] A crossbeam 502 is arranged below the storage plate 3. Both ends of the crossbeam 502 are fixed to the inner wall of the tank body 1. The bottom of the second flushing pipeline 5 is fixed on the crossbeam 502. The arranged crossbeam 502 fixes the second flushing pipeline 5 to prevent the second flushing pipeline 5 from shaking during flushing. The part of the second flushing pipeline 5 located in the through hole 301 is arranged vertically upward, and a plurality of second spray heads 501 are arranged along the circumferential direction of this part, so that the range of the ejected carbon dioxide fluid is circular. And a second spray head 501 with a vertically upward spraying direction is arranged at the top of the second flushing pipeline 5, which can clean the top wall of a hollow structure object with only one end open.

[0040] When using supercritical carbon dioxide for cleaning, the sealing requirement for the inside of the tank body 1 is relatively high. Therefore, a sealing strip is arranged at the contact part between the sealing cover 2 and the opening 101, and a sealing strip is also arranged at the contact position between the fixing rod 6 and the top wall of the tank body 1. Other conventional technical means can also be used for sealing.

[0041] The usage method of the supercritical carbon dioxide jet cleaning device provided in this embodiment is as follows: First, open the sealing cover 2, start the first telescopic rod 8, make the first telescopic rod 8 extend upward, drive the fixing rod 6 to move upward, and make the clamping member 9 on the storage plate 3 extend out of the tank body 1. Select a suitable clamping plate 903 according to the shape of the object to be cleaned, place the object to be cleaned between the two clamping plates 903, make the opening of the object to be cleaned face the through hole 301, adjust the second telescopic rod 902 to clamp the object with the two clamping plates 903. After fixing the object, start the first telescopic rod 8 again, make the first telescopic rod 8 retract, and the fixing rod 6 drives the storage plate 3 to move downward to a suitable position. When cleaning a hollow structure object with an opening, it is necessary to make the second flushing pipeline 5 extend into the opening of the object to be cleaned, and close the sealing cover 2; start the cleaning process. The liquid CO 2 flowing out of the storage tank 2 is made to reach the specified operating pressure and operating temperature through a high-pressure pump and a heater to become a supercritical fluid, and then enters the first flushing pipeline 4 and the second flushing pipeline 5. The outside of the object is cleaned through the first spray head 401, and the inside of the object is cleaned through the second spray head 501. Since the contact part between the clamping plate 903 and the object to be cleaned cannot be cleaned, each object is cleaned twice. After one cleaning is completed, the object is taken out, and the clamping direction of the object is changed and then cleaned again.

[0042] Embodiment 2

[0043] A supercritical carbon dioxide jet cleaning device. The technical solution in this embodiment is basically the same as that in Embodiment 1, except that: the connection structure between the clamping plate 903 and the telescopic rod 902 in this embodiment is different.

[0044] Such as Figure 5As shown in the figure, a plurality of positioning beads 905 are installed at the end of the second telescopic rod 902 along the circumferential direction. A connecting pipe 904 is fixed to the side wall of the clamping plate 903. A plurality of positioning holes 906 corresponding to the positioning beads 905 are provided through the end of the connecting pipe 904 away from the clamping plate 903. During installation, the end of the second telescopic rod 902 is inserted into the connecting pipe 904, and the positioning beads 905 automatically pop into the positioning holes 906.

[0045] At the same time, a reinforcing ring 907 is sleeved outside the end of the second telescopic rod 902. The reinforcing ring 907 is threadedly connected to both the end of the second telescopic rod 902 and the connecting pipe 904. A first external thread 908 is provided at the end of the second telescopic rod 902, a second external thread 909 is provided at the end of the connecting pipe 904 away from the clamping plate 903, and two kinds of internal threads matching the first external thread 908 and the second external thread 909 are provided on the inner wall of the reinforcing ring 907. During installation, after the positioning beads 905 pop into the positioning holes 906, the reinforcing ring 907 is tightened with the first external thread 908 and the second external thread 909 to improve the connection stability of the clamping plate 903.

[0046] When the clamping plate 903 needs to be replaced, the end of the second telescopic rod 902 is inserted into the connecting pipe 904, the positioning beads 905 automatically pop into the positioning holes 906, and then the reinforcing ring 907 is tightened and fixed with the first external thread 908 and the second external thread 909, which is simple and convenient to use.

[0047] Embodiment 3

[0048] A supercritical carbon dioxide jet cleaning device. The technical solution in this embodiment is basically the same as that in Embodiment 1, except that: in this embodiment, one end of the sealing cover 2 is hinged to the opening 101 through a hinge shaft. An L-shaped limiting block 203 is provided at the end of the sealing cover 2 away from the hinge shaft, and the L-shaped limiting block 203 is clamped with the top wall of the tank body 1.

[0049] As Figure 6 and Figure 7 shown, a chute 201 is provided on the top of the sealing cover 2, a through groove 204 is provided on the side wall of the sealing cover 2, the through groove 204 is communicated with the chute 201, a sliding rod 202 is fixed in the chute 201, and the vertical section of the L-shaped limiting block 203 slides along the sliding rod 202. The horizontal section of the L-shaped limiting block 203 can slide along the chute 201 into the through groove 204 and extend out of the sealing cover 2. The width of the horizontal section of the L-shaped limiting block 203 is greater than that of the vertical section, the vertical section is located in the middle of one end of the horizontal section, and at the same time, the top of the vertical section is located above the sealing cover 2. As Figure 8 shown, a clamping groove 104 is provided on the side wall of the opening 101, and the horizontal section of the L-shaped limiting block 203 is clamped with the clamping groove 104.

[0050] A spring 205 is sleeved on the sliding rod 202. One end of the spring 205 is fixed to the side wall of the vertical section of the L-shaped limit block 203 away from the horizontal section, and the other end is fixed to the side wall of the sliding groove 201. Due to the elastic force of the spring 205, the horizontal section of the L-shaped limit block 203 always extends out of the sealing cover 2. During use, slide the vertical section of the L-shaped limit block 203 to make the horizontal section of the L-shaped limit block 203 completely retract into the through groove 204, cover the sealing cover 2, and then release the vertical section of the L-shaped limit block 203. The horizontal section of the L-shaped limit block 203 is inserted into the clamping groove 104 under the action of the elastic force of the spring 205.

[0051] A handle 206 is provided at one end of the top of the sealing cover 2 close to the L-shaped limit block 203.

[0052] The L-shaped limit block 203 which is clamped with the top wall of the tank body 1 is arranged on the sealing cover 2, which avoids the problem that the sealing cover 2 is pushed open under a large pressure during the jet cleaning of objects, prevents the cleaning material from splashing out from the inside of the tank body 1 and causing harm to the staff, and improves the use safety of the jet cleaning device.

[0053] The supercritical carbon dioxide jet cleaning device provided by the utility model can clean the inside of a hollow structure object with an opening, the cleaning is thorough and there is no cleaning dead angle; the detachable clamping plate is provided and can be replaced according to the shape of the object to be cleaned, which is suitable for cleaning objects of various shapes; the L-shaped limit block which is clamped with the tank body is arranged on the sealing cover, which avoids the problem that the sealing cover is pushed open during jet cleaning and improves the use safety of the device.

[0054] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A supercritical carbon dioxide jet cleaning device, characterized in that: The invention comprises a tank body (1), wherein a sealing cover (2) is provided on the top of the tank body (1), a first flushing pipe (4) is provided inside the tank body (1), and a plurality of first nozzles (401) are provided on the first flushing pipe (4); a storage plate (3) movable up and down is provided inside the tank body (1), and at least two clamping members (9) are provided on the storage plate (3), a through hole (301) is provided in the middle of the storage plate (3), a second flushing pipe (5) is provided in the through hole (301), and a plurality of second nozzles (501) are provided on the second flushing pipe (5), and the first flushing pipe (4) and the second flushing pipe (5) are respectively connected to a carbon dioxide storage tank through pipes.

2. The supercritical carbon dioxide jet cleaning device according to claim 1, characterized in that: Connecting plates (303) are symmetrically provided at both ends of the storage plate (3), a fixing rod (6) is provided at the top of the connecting plate (303), the top of the fixing rod (6) passes through the top wall of the tank body (1) and is connected to a first telescopic rod (8), and the first telescopic rod (8) is located at the top of the tank body (1).

3. The supercritical carbon dioxide jet cleaning device according to claim 2, characterized in that: The storage plate (3) is a grid plate, a mounting plate (302) is fixed on the top of the storage plate (3), and the clamping member (9) is provided on the mounting plate (302).

4. The supercritical carbon dioxide jet cleaning device according to claim 2, characterized in that: The clamping member (9) comprises a support plate (901), a second telescopic rod (902) is provided on the upper part of the support plate (901), and a detachable clamping plate (903) is provided at one end of the second telescopic rod (902) away from the support plate (901).

5. The supercritical carbon dioxide jet cleaning device according to claim 4, characterized in that: A plurality of positioning beads (905) are provided at one end of the second telescopic rod (902) away from the support plate (901), a connecting tube (904) is fixed to the side wall of the clamping plate (903), and a plurality of positioning holes (906) corresponding to the positioning beads (905) are provided on the connecting tube (904), and the positioning beads (905) are ejected into the positioning holes (906).

6. The supercritical carbon dioxide jet cleaning device according to claim 5, characterized in that: The second telescopic rod (902) is covered with a reinforcement ring (907) on the outside, and the reinforcement ring (907) is threadedly connected to the second telescopic rod (902) and the connecting pipe (904) respectively.

7. The supercritical carbon dioxide jet cleaning device according to claim 1, characterized in that: The top of the tank body (1) is provided with an opening (101), and one side of the sealing cover (2) is hingedly connected to the opening (101).

8. The supercritical carbon dioxide jet cleaning device according to claim 7, characterized in that: The sealing cover (2) is provided with a slide groove (201) at the top, a slide rod (202) is fixed in the slide groove (201), an L-shaped limit block (203) which can slide along the slide groove (201) is provided on the slide rod (202), a clamping groove (104) is provided on one of the side walls of the opening (101), and one end of the horizontal section of the L-shaped limit block (203) can pass through the sealing cover (2) and extend into the clamping groove (104).

9. The supercritical carbon dioxide jet cleaning device according to claim 8, characterized in that: A spring (205) is sleeved on the slide bar (202), one end of the spring (205) is fixed to the vertical section of the L-shaped limit block (203), and the other end of the spring (205) is fixedly connected to the side wall of the slide groove (201).

10. The supercritical carbon dioxide jet cleaning device according to claim 1, characterized in that: A sewage discharge pipe (102) is provided at the bottom of the tank body (1), and a control valve is provided on the sewage discharge pipe (102).

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