Air separation equipment feed gas purification equipment and purification method thereof

Abstract

The present invention discloses an air separation equipment feed gas purification device and a purification method thereof in the field of gas purification technology, comprising a fixed bottom plate, two purification boxes are fixedly installed on the top of the fixed bottom plate, a first air inlet pipe is fixedly connected between the two purification boxes, a second air inlet pipe is fixedly connected to the middle of the first air inlet pipe, and a detection mechanism for detecting dust deposited inside the purified liquid is connected to the inner sides of the two purification boxes; the present invention automatically detects dust accumulation inside the purification box through the cooperation of the two purification boxes with the detection mechanism, two opening and closing mechanisms and a control mechanism, controls the opening and closing mechanism to close the gas entry in time, and controls only one of the two opening and closing mechanisms to be closed, thereby ensuring that the two purification boxes always process the gas, avoiding shutdown for processing of the purification boxes, and automatically cleans the purification boxes by using the cleaning mechanism, which is convenient and quick.

Description

Technical Field

[0001] The invention relates to the technical field of gas purification, in particular to air separation equipment feed gas purification equipment and a purification method thereof. Background Art

[0002] When using air separation equipment to separate air components, it is necessary to purify the dust in the air in advance to prevent the dust in the air from affecting the subsequent separation of different air components.

[0003] When existing air separation equipment continues to separate the purified gas, it is necessary to continuously purify the air in advance. After continuously removing the dust in the air for a period of time, a large amount of dust will remain in the purified liquid after purification. First, it will reduce the subsequent dust purification capacity. Second, it will cause dust accumulation inside the purified liquid, which requires shutdown for replacement and cleaning, which will seriously affect the efficiency of air separation of the air separation equipment and is inconvenient to clean. Summary of the invention

[0004] The object of the present invention is to provide a purification device for automatically replacing, cleaning and continuously purifying the feed gas of an air separation plant, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: air separation equipment feed gas purification equipment, comprising a fixed bottom plate, two purification boxes are fixedly installed on the top of the fixed bottom plate, a first air inlet pipe is fixedly connected between the two purification boxes, a second air inlet pipe is fixedly connected to the middle of the first air inlet pipe, the inner sides of the two purification boxes are connected with a detection mechanism for detecting dust deposited inside the purification liquid, the outer side walls of the two purification boxes are connected with an opening and closing mechanism for closing the corresponding first air inlet pipe leading to the purification box after the detection of the detection mechanism is completed, the two opening and closing mechanisms are connected with a control mechanism for controlling only one of the two opening and closing mechanisms to be closed, the outer side walls of the two purification boxes are connected with a cleaning mechanism for cleaning the purification boxes, the tops of the two purification boxes are fixedly connected with an exhaust pipe and a water inlet pipe, and the outer side walls of the two purification boxes are connected with a discharge pipe for discharging;

[0006] The detection mechanism includes a detection plate, which is vertically slidably connected to the inner wall of the purification box, and a plurality of first sliding bars are fixedly connected to the bottom of the detection plate, each of which is slidably connected to the inner wall of the purification box, and a detection spring for supporting the detection plate is sleeved on the outer surface of each of the first sliding bars;

[0007] The opening and closing mechanism includes a sealing disk, the sealing disk is located on the inner side of the first air inlet pipe, a first rotating rod is fixedly connected to the outer surface of the sealing disk, the top end of the first rotating rod passes through the first air inlet pipe and is rotatably connected thereto, a first baffle is fixedly connected to the outer surface of the first rotating rod, a first torsion spring fixedly connected between the first air inlet pipe and the first baffle is sleeved on the outer surface of the first rotating rod, and a sealing mechanism is provided on the outer side of the first air inlet pipe for driving the first rotating rod and the sealing disk to rotate and seal the first air inlet pipe when the detection plate descends;

[0008] The sealing mechanism comprises a lifting frame, the lifting frame is fixedly connected to the bottom of the first sliding rods on the same side, a lifting plate is fixedly connected to the middle of the lifting frame, the outer end of the lifting plate is located at the outer side of the purification box, the top of the lifting plate is fixedly connected to the extrusion plate, the outer side wall of the purification box is fixedly connected to the first connecting plate, the interior of the first connecting plate is slidably connected to a positioning rod, the rear end of the positioning rod passes through the first rotating rod, the front end of the positioning rod is fixedly connected to a second baffle, the outer surface of the positioning rod is sleeved with a tensioning spring fixedly connected between the first connecting plate and the second baffle, a baffle is fixedly connected to the front side wall of the second baffle, the baffle is slidably connected to the side wall of the first connecting plate front and back, and the extrusion plate pushes the baffle forward when moving downward;

[0009] The control mechanism includes two L-shaped support frames, the two L-shaped support frames are respectively fixedly connected to the outer side walls on the opposite sides of the two purification boxes, the top ends of the two first rotating rods are fixedly connected to swing plates, the swing plates and the sealing disk are also arranged horizontally, the two L-shaped support frames are slidably connected to a third sliding rod together, the left and right ends of the third sliding rod are fixedly connected to a positioning plate, the positioning plate is located on one side of the swing plate and is used to push the positioning plate on the other side to move outward after the sealing disk on one side rotates, thereby blocking the sealing disk on the other side from sealing the first air inlet pipe, and a reset mechanism is connected to the outer side wall of the purification box for driving the first rotating rod and the sealing disk to rotate and reset after the liquid is drained;

[0010] The reset mechanism includes a detector, the detector is fixedly connected to the inner wall of the purification box, the detector is used to detect the position of the detection plate, the outer wall of the purification box is fixedly connected to a first motor, the detector is used to control the start of the first motor, the output end of the first motor is fixedly connected to a swing rod, and the swing rod is used to push the swing plate to reset;

[0011] The cleaning mechanism includes four water storage tanks, which are respectively fixedly connected to the four side walls of the purification box, and each purification box is provided with a first water pipe fixedly connected to the fixed bottom plate on the outside, and the first water pipe is connected to the water storage tank through four second water pipes;

[0012] A method for purifying feed gas of an air separation plant, the specific steps of the method are:

[0013] Step 1: First, inject the purified liquid into the two purification boxes from the water inlet pipe;

[0014] Step 2: The gas to be purified is introduced from the second air inlet pipe, the gas enters the first air inlet pipe through the second air inlet pipe, and then enters the purified liquid in the two purification boxes from the left and right ends of the first air inlet pipe through the opening and closing, and the gas passing through the purified liquid is dusted;

[0015] Step 3: When the detection mechanism detects that the weight inside the purification box is increasing, the opening and closing mechanism is triggered;

[0016] Step 4: The opening and closing mechanism closes the first air inlet pipe leading to the purification box, cuts off the subsequent air inlet, and simultaneously opens the water inlet pipe to discharge the purified liquid, and the cleaning mechanism flushes the inside of the purification box;

[0017] Step 5: After the purified liquid is discharged, the discharge pipe is closed, and new purified liquid is injected into the purification box from the water inlet pipe, and when one of the opening and closing mechanisms is triggered, the control mechanism is used to control the other opening and closing mechanism to always be in an open state;

[0018] Step 6: The gas after dust removal is discharged through the exhaust pipe, and then passed into the air separation equipment for further treatment after being treated.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention uses two purification boxes to cooperate with a detection mechanism, two opening and closing mechanisms and a control mechanism to automatically detect dust accumulation inside the purification box, and control the opening and closing mechanism to close the gas in time, and control only one of the two opening and closing mechanisms to be closed, thereby ensuring that the two purification boxes are always processing the gas, avoiding shutdown for processing of the purification boxes, and using the cleaning mechanism to automatically clean the purification box, which is convenient and quick.

[0021] 2. The present invention adds purified liquid into the purification box in a quantitative manner each time. As the gas passes through the purified liquid, more and more dust is deposited inside the purified liquid on the top of the detection plate, causing the weight above the detection plate to become heavier, squeezing the detection spring downward, causing the detection plate to slide downward. When the detection plate moves down into place, it indicates that the purified liquid needs to be replaced, which is conducive to timely and automatic processing of the purification box and continuous processing of the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a flow chart of the purification method of the present invention;

[0023] Figure 2It is a first stereoscopic view of the overall structure of the present invention;

[0024] Figure 3 It is a second stereoscopic view of the overall structure of the present invention;

[0025] Figure 4 It is a cross-sectional view of the purification box of the present invention;

[0026] Figure 5 for Figure 4 A magnified view of the structure at center;

[0027] Figure 6 It is a schematic diagram of the structure of the opening and closing mechanism of the outer side of the purification box of the present invention;

[0028] Figure 7 for Figure 6 A magnified view of the structure at B in the middle;

[0029] Figure 8 It is a schematic diagram of the control mechanism structure of the present invention;

[0030] Fig. 9 for Figure 8 A magnified view of the structure at C in the middle;

[0031] Fig.10 It is a schematic diagram of the positions of the swing rod, the swing plate and the positioning plate of the present invention.

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] Fixed bottom plate 1, purification box 2, first air inlet pipe 3, second air inlet pipe 4, exhaust pipe 5, water inlet pipe 6, discharge pipe 7, detection plate 8, first slide bar 9, detection spring 10, sealing plate 11, first rotating rod 12, first baffle plate 13, first torsion spring 14, lifting frame 15, lifting plate 16, extrusion plate 17, first connecting plate 18, positioning rod 19, second baffle plate 20, tensioning spring 21, baffle plate 22, L-shaped support frame 23, swing plate 24, third slide bar 25, positioning plate 26, detector 27, first motor 28, swing rod 29, water storage tank 30, first water pipe 31, second water pipe 32. DETAILED DESCRIPTION

[0034] See also Figure 1-Figure 10The present invention provides a technical solution: an air separation device feed gas purification device, comprising a fixed bottom plate 1, two purification boxes 2 are fixedly installed on the top of the fixed bottom plate 1, a first air inlet pipe 3 is fixedly connected between the two purification boxes 2, a second air inlet pipe 4 is fixedly connected to the middle of the first air inlet pipe 3, the inner sides of the two purification boxes 2 are connected with a detection mechanism for detecting dust deposited inside the purification liquid, the outer side walls of the two purification boxes 2 are connected with an opening and closing mechanism for closing the first air inlet pipe 3 corresponding to the purification box 2 after the detection of the detection mechanism is completed, the two opening and closing mechanisms are connected with a control mechanism for controlling only one of the two opening and closing mechanisms to be closed, the outer side walls of the two purification boxes 2 are connected with a cleaning mechanism for cleaning the purification boxes 2, the tops of the two purification boxes 2 are fixedly connected with an exhaust pipe 5 and a water inlet pipe 6, and the outer side walls of the two purification boxes 2 are connected with a discharge pipe 7 for discharging;

[0035] When the device is working, the purified liquid is first injected into the two purification boxes 2 from the water inlet pipe 6, and then the air inlet pipe is closed, and the gas to be purified is introduced from the second air inlet pipe 4, and the gas enters the first air pipe through the second air pipe, and then is opened and closed from the left and right ends of the first air inlet pipe 3 into the purified liquid in the two purification boxes 2, and the gas passing through the purified liquid is dedusted, and the dedusted gas is discharged through the exhaust pipe 5, and then is introduced into the air separation device for treatment after being treated. It is convenient and fast, and after a period of treatment, more and more impurities gather in the purified liquid, which continuously gathers into dust and mud, resulting in the weight of the purified liquid becoming larger and larger. When the detection mechanism detects that the weight inside the purification box 2 is increasing, the opening and closing mechanism is triggered, indicating that the gas in one of the purification boxes 2 is There is too much dust inside the purified liquid, which will affect the purification effect in the future. It is necessary to process the purified liquid inside the purification box 2 and clean the purification box 2. The opening and closing mechanism will close the first air inlet pipe 3 leading to the purification box 2, cut off the subsequent gas introduction, and open the water inlet pipe 6 at the same time to discharge the purified liquid. The cleaning mechanism will flush the inside of the purification box 2, thereby automatically cleaning the purification box 2. After the purified liquid is discharged, the discharge pipe 7 is closed, and new purified liquid is injected into the purification box 2 from the water inlet pipe 6. When one of the opening and closing mechanisms is triggered, the control mechanism is used to control the other opening and closing mechanism to always be in an open state to avoid the two opening and closing mechanisms being closed at the same time, thereby ensuring that the gas can be processed at all times, avoiding gas stagnation processing, and facilitating the continuous provision of processed gas for the subsequent period.

[0036] As a further solution of the present invention, the detection mechanism includes a detection plate 8, which is vertically slidably connected to the inner wall of the purification box 2, and a plurality of first slide bars 9 are fixedly connected to the bottom of the detection plate 8, each of which is slidably connected to the inner wall of the purification box 2, and a detection spring 10 for supporting the detection plate 8 is sleeved on the outer surface of each first slide bar 9; during operation, since it is necessary to timely detect the accumulation of dust and mud in the purified liquid after each treatment for a period of time, by adding the purified liquid to the purification box 2 in a quantitative manner each time, as the gas passes through the purified liquid, the dust inside the purified liquid at the top of the detection plate 8 becomes more and more, and is continuously deposited, resulting in the weight above the detection plate 8 becoming larger and larger, squeezing the detection spring 10 downward, causing the detection plate 8 to slide downward. When the detection plate 8 moves down to its place, it indicates that the purified liquid needs to be replaced at this time, which is conducive to timely and automatic treatment of the purification box 2 and continuous treatment of the gas.

[0037] As a further solution of the present invention, the opening and closing mechanism includes a sealing disk 11, the sealing disk 11 is located on the inner side of the first air inlet pipe 3, a first rotating rod 12 is fixedly connected to the outer surface of the sealing disk 11, the top end of the first rotating rod 12 passes through the first air inlet pipe 3 and is rotatably connected thereto, a first baffle plate 13 is fixedly connected to the outer surface of the first rotating rod 12, a first torsion spring 14 fixedly connected between the first air inlet pipe 3 and the first baffle plate 13 is sleeved on the outer surface of the first rotating rod 12, and a sealing mechanism for driving the first rotating rod 12 and the sealing disk 11 to rotate and seal the first air inlet pipe 3 when the detection plate 8 descends is provided on the outer side of the first air inlet pipe 3;

[0038] As a further solution of the present invention, the sealing mechanism includes a lifting frame 15, which is fixedly connected to the bottom of several first sliding rods 9 on the same side, a lifting plate 16 is fixedly connected to the middle of the lifting frame 15, the outer end of the lifting plate 16 is located on the outside of the purification box 2, and the top of the lifting plate 16 is fixedly connected to an extrusion plate 17, and a first connecting plate 18 is fixedly connected to the outer wall of the purification box 2, and a positioning rod 19 is slidably connected inside the first connecting plate 18, and the rear end of the positioning rod 19 passes through the first rotating rod 12, and the front end of the positioning rod 19 is fixedly connected to a second baffle 20, and a tension spring 21 fixedly connected between the first connecting plate 18 and the second baffle 20 is sleeved on the outer surface of the positioning rod 19, and a baffle 22 is fixedly connected to the front side wall of the second baffle 20, and the baffle 22 is slidably connected to the side wall of the first connecting plate 18, and the extrusion plate 17 pushes the baffle 22 forward when moving downward;

[0039] As a further solution of the present invention, the control mechanism includes two L-shaped support frames 23, the two L-shaped support frames 23 are respectively fixedly connected to the outer side walls on the opposite sides of the two purification boxes 2, the top ends of the two first rotating rods 12 are fixedly connected with swing plates 24, the swing plates 24 and the sealing disk 11 are also arranged horizontally, the two L-shaped support frames 23 are slidably connected with a third slide bar 25, the left and right ends of the third slide bar 25 are fixedly connected with positioning plates 26, the positioning plate 26 is located on one side of the swing plate 24 and is used to push the positioning plate 26 on the other side to move outward after the sealing disk 11 on one side rotates, thereby blocking the sealing disk 11 on the other side from sealing the first air inlet pipe 3, and a reset mechanism is connected to the outer side wall of the purification box 2 for driving the first rotating rod 12 and the sealing disk 11 to rotate and reset after the liquid is discharged;

[0040] During operation, since each time the detection mechanism detects that the sediment in the purified liquid has reached a certain level, it is necessary to promptly close the first air inlet pipe 3 to cut off the subsequent gas from continuing to enter the purification box 2. Each time the detection plate 8 and the four first slide bars 9 slide downward, the lifting frame 15 and the lifting plate 16 are driven to move downward at the same time, and the lifting plate 16 drives the squeezing plate 17 to move downward, squeezes the baffle plate 22 forward, and drives the positioning rod 19 to move forward, so that the positioning rod 19 slowly pulls out the first rotating rod 12. When the detection plate 8 is about to be in place, the positioning rod 19 is separated from the first rotating rod 12, and the first rotating rod 12 rotates under the action of the first torsion spring 14 and the first baffle plate 13. The first rotating rod 12 drives the swing plate 24 to rotate, so that the swing plate 24 rotates 90°, and pushes the positioning plate 26 to the other side, so that the positioning plate 26 on the other side passes the 90° position of the first rotating rod 12, thereby To avoid the sealing disk 11 on one side from closing when the sealing disk 11 on the other side is closed, the sealing disk 11 is driven to rotate to seal the first air inlet pipe 3, cutting off the gas to the purification box 2 that needs to be processed, so that the gas can only enter the other purification box 2 from the other side, with better continuity, and then the purified liquid in the purification box 2 is discharged. When the purified liquid is discharged, the detection plate 8 moves upward under the action of the detection spring 10, and drives the extrusion plate 17 to move upward through the lifting frame 15 and the lifting plate 16, releasing the push on the baffle 22, and then adding new purified liquid to the purification box 2. After the detection plate 8 moves downward to the initial position, the reset mechanism is triggered to rotate and reset the first rotating rod 12. The positioning rod 19 is inserted into the first rotating rod 12 again under the action of the tensioning spring 21, keeping the sealing disk 11 open, and again introducing gas into the treated purification box 2 for processing.

[0041] As a further solution of the present invention, the reset mechanism includes a detector 27, which is fixedly connected to the inner wall of the purification box 2. The detector 27 is used to detect the position of the detection plate 8. A first motor 28 is fixedly connected to the outer wall of the purification box 2. The detector 27 is used to control the start of the first motor 28. A swing rod 29 is fixedly connected to the output end of the first motor 28. The swing rod 29 is used to push the swing plate 24 to reset. During operation, after each sealing disk 11 seals the first air inlet pipe 3, after the treatment in the purification box 2 is completed, the sealing disk 11 needs to be opened in time before the gas can be processed subsequently. After each cleaning of the purification box 2, when a certain amount of purification liquid is added again, the detection plate 8 is pressed down to the initial position, triggering the detector 27. The detector 27 controls the start of the first motor 28, driving the swing rod 29 to reset the swing plate 24 rotated 90°, thereby rotating and opening the first rotating rod 12 and the sealing disk 11. The subsequent positioning rod 19 inserts the first rotating rod 12 into position to maintain the open state of the sealing disk 11, so that the gas is passed into the purification box 2 again for processing.

[0042] As a further solution of the present invention, the cleaning mechanism includes four water storage tanks 30, and the four water storage tanks 30 are respectively fixedly connected to the four side walls of the purification box 2. A first water pipe 31 fixedly connected to the fixed bottom plate 1 is provided on the outside of each purification box 2, and the first water pipe 31 is connected to the water storage tank 30 through four second water pipes 32; during operation, when the purification box 2 needs to be cleaned, water is introduced into the first water pipe 31, and then enters the four water storage tanks 30 through the four second water pipes 32, so that the cleaning liquid overflows from the inner end of the water storage tank 30, slides along the inner wall of the purification box 2, and cleans the inner wall of the purification box 2.

[0043] A method for purifying feed gas of an air separation plant, the specific steps of the method are:

[0044] Step 1: First, inject the purified liquid into the two purification boxes 2 from the water inlet pipe 6;

[0045] Step 2: The gas to be purified is introduced from the second air inlet pipe 4, the gas enters the first air inlet pipe through the second air inlet pipe, and then enters the purified liquid in the two purification boxes 2 from the left and right ends of the first air inlet pipe 3 through opening and closing, and the gas passing through the purified liquid is dusted;

[0046] Step 3: When the detection mechanism detects that the weight inside the purification box 2 is increasing, the opening and closing mechanism is triggered;

[0047] Step 4: The opening and closing mechanism closes the first air inlet pipe 3 leading to the purification box 2, cuts off the subsequent air inlet, and simultaneously opens the water inlet pipe 6 to discharge the purified liquid, and the cleaning mechanism flushes the inside of the purification box 2;

[0048] Step 5: After the purified liquid is discharged, the discharge pipe 7 is closed, and new purified liquid is injected into the purification box 2 from the water inlet pipe 6, and when one of the opening and closing mechanisms is triggered, the control mechanism is used to control the other opening and closing mechanism to always be in an open state;

[0049] Step 6: The gas after dust removal is discharged through the exhaust pipe 5, and then passed into the air separation equipment for further treatment after being treated.

Claims

1. An air separation plant feed gas purification device, comprising a fixed bottom plate (1), characterized in that: Two purification boxes (2) are fixedly mounted on the top of the fixed bottom plate (1); a first air inlet pipe (3) is fixedly connected between the two purification boxes (2); a second air inlet pipe (4) is fixedly connected to the middle of the first air inlet pipe (3); a detection mechanism for detecting dust deposited inside the purified liquid is connected to the inner side of the two purification boxes (2); an opening and closing mechanism for closing the first air inlet pipe (3) corresponding to the purification box (2) after the detection by the detection mechanism is completed is connected to the outer side walls of the two purification boxes (2); a control mechanism for controlling only one of the two opening and closing mechanisms to be closed is connected to the outer side walls of the two purification boxes (2); an exhaust pipe (5) and a water inlet pipe (6) are fixedly connected to the top of the two purification boxes (2); and a discharge pipe (7) for discharging is connected to the outer side walls of the two purification boxes (2); The detection mechanism comprises a detection plate (8), the detection plate (8) is vertically slidably connected to the inner wall of the purification box (2), a plurality of first sliding bars (9) are fixedly connected to the bottom of the detection plate (8), each of the first sliding bars (9) is slidably connected to the inner wall of the purification box (2), and a detection spring (10) for supporting the detection plate (8) is sleeved on the outer surface of each of the first sliding bars (9); The opening and closing mechanism comprises a sealing disk (11), the sealing disk (11) is located on the inner side of the first air inlet pipe (3), a first rotating rod (12) is fixedly connected to the outer surface of the sealing disk (11), the top end of the first rotating rod (12) passes through the first air inlet pipe (3) and is rotatably connected thereto, a first baffle plate (13) is fixedly connected to the outer surface of the first rotating rod (12), a first torsion spring (14) is sleeved on the outer surface of the first rotating rod (12) and is fixedly connected between the first air inlet pipe (3) and the first baffle plate (13), and a sealing mechanism is arranged on the outer side of the first air inlet pipe (3) for driving the first rotating rod (12) and the sealing disk (11) to rotate to seal the first air inlet pipe (3) when the detection plate (8) descends; The control mechanism comprises two L-shaped support frames (23), the two L-shaped support frames (23) are respectively fixedly connected to the outer side walls of the opposite sides of the two purification boxes (2), the top ends of the two first rotating rods (12) are fixedly connected to the swinging plates (24), the swinging plates (24) and the sealing disk (11) are also arranged horizontally, the two L-shaped support frames (23) are slidably connected to the third sliding rod (25), the left and right ends of the third sliding rod (25) are fixedly connected to the positioning plates (26), the positioning plates (26) are located on one side of the swinging plates (24) and are used to push the positioning plates (26) on the other side to move outward after the sealing disk (11) on one side rotates, thereby blocking the sealing disk (11) on the other side from sealing the first air inlet pipe (3), and the outer side wall of the purification box (2) is connected to a reset mechanism for driving the first rotating rod (12) and the sealing disk (11) to rotate and reset after the liquid is discharged.

2. The air separation plant feed gas purification device according to claim 1, characterized in that: The sealing mechanism comprises a lifting frame (15), the lifting frame (15) is fixedly connected to the bottom of a plurality of the first sliding bars (9) on the same side, a lifting plate (16) is fixedly connected to the middle of the lifting frame (15), the outer end of the lifting plate (16) is located outside the purification box (2), the top of the lifting plate (16) is fixedly connected to an extrusion plate (17), the outer side wall of the purification box (2) is fixedly connected to a first connecting plate (18), the interior of the first connecting plate (18) is slidably connected to a positioning rod (19), and the The rear end of the positioning rod (19) passes through the first rotating rod (12); the front end of the positioning rod (19) is fixedly connected to the second baffle (20); a tension spring (21) fixedly connected between the first connecting plate (18) and the second baffle (20) is sleeved on the outer surface of the positioning rod (19); a baffle (22) is fixedly connected to the front side wall of the second baffle (20); the baffle (22) is slidably connected to the side wall of the first connecting plate (18) in a forward and backward manner; and the extrusion plate (17) pushes the baffle (22) forward when moving downward.

3. The air separation plant feed gas purification device according to claim 1, characterized in that: The reset mechanism comprises a detector (27), the detector (27) being fixedly connected to the inner wall of the purification box (2), the detector (27) being used to detect the position of the detection plate (8), a first motor (28) being fixedly connected to the outer wall of the purification box (2), the detector (27) being used to control the start of the first motor (28), an output end of the first motor (28) being fixedly connected to a swing rod (29), the swing rod (29) being used to push the swing plate (24) to reset.

4. The air separation plant feed gas purification device according to claim 1, characterized in that: The cleaning mechanism comprises four water storage tanks (30), the four water storage tanks (30) are respectively fixedly connected to the four side walls of the purification box (2), and each purification box (2) is provided with a first water pipe (31) fixedly connected to the fixed bottom plate (1) on the outside, and the first water pipe (31) is connected to the water storage tank (30) through four second water pipes (32).

5. A method for purifying feed gas of an air separation plant, applicable to the feed gas purification device of an air separation plant as claimed in any one of claims 1 to 4, characterized in that: The specific steps of this method are: Step 1: First, inject the purified liquid into the two purification boxes (2) from the water inlet pipe (6); Step 2: The gas to be purified is introduced from the second air inlet pipe (4), the gas passes through the second air inlet pipe into the first air inlet pipe, and then passes through the left and right ends of the first air inlet pipe (3) into the purified liquid in the two purification boxes (2), and the gas passing through the purified liquid is dust-removed; Step 3: When the detection mechanism detects that the weight inside the purification box (2) is increasing, the opening and closing mechanism is triggered; Step 4: The opening and closing mechanism closes the first air inlet pipe (3) leading to the purification box (2), cuts off the subsequent air inlet, and simultaneously opens the discharge pipe (7) to discharge the purified liquid, and the cleaning mechanism flushes the inside of the purification box (2); Step 5: After the purified liquid is discharged, the discharge pipe (7) is closed, and new purified liquid is injected into the purification box (2) from the water inlet pipe (6), and when one of the opening and closing mechanisms is triggered, the control mechanism is used to control the other opening and closing mechanism to always be in an open state; Step 6: The gas after dust removal is discharged through the exhaust pipe (5), and then introduced into the air separation equipment for further treatment after being treated.

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