Esterification filtering and deslagging device

Abstract

The utility model belongs to the technical field of separating devices, and particularly relates to an esterification filtering and deslagging device which comprises a shell and a support used for supporting the shell, a filtering unit is arranged in the shell, the whole shell is arranged in a horizontal cylindrical shape, one end of the shell is closed, and an end cover which slides in the axial direction of the shell and can be locked in the circumferential direction is arranged at the other end of the shell. The end, facing the shell, of the end cover is fixedly connected with the filtering unit. The end, away from the shell, of the end cover is connected with a moving-out assembly. The end, close to the end cover, of the shell is sleeved with a fixing ring capable of rotating around the axis of the shell, a driving cylinder driving the fixing ring to rotate is arranged on the fixing ring and comprises a cylinder body, a telescopic piston rod is arranged at one end of the cylinder body, the end, away from the piston rod, of the cylinder body is connected with the shell through a hinge base, and the end, away from the cylinder body, of the piston rod is connected with the fixing ring. The device can keep reliable sealing under high-temperature and high-pressure conditions, and the operation safety and the maintenance efficiency are improved.

Description

Technical Field

[0001] This utility model belongs to the field of separation device technology, specifically relating to an esterification filtration and slag removal device. Background Technology

[0002] In the fine chemical industry, including plasticizers and lubricating esters, esterification is a core production process. The crude ester solution produced typically contains unreacted catalysts, raw material impurities, or other solid particles. These impurities severely affect the color, conductivity, and thermal stability of subsequent products, necessitating effective filtration and slag removal. Currently, the industry commonly uses pressure filtration devices to process these high-temperature, high-viscosity esterification solutions. During operation, the crude ester solution passes through a filter media under pressure; solid impurities are trapped, forming a filter cake, while the clean ester solution is separated. However, existing devices have two major drawbacks: First, under high-temperature and high-pressure conditions, end caps secured only by bolts are prone to sealing failure due to uneven stress or thermal relaxation, leading to leakage of the high-temperature ester solution and posing a safety risk. Second, end caps designed to withstand pressure are often very thick and heavy, weighing several tons, making them extremely difficult to open during maintenance. This not only results in low efficiency but also poses a significant safety hazard of end cap slippage or overturning.

[0003] Chinese patent CN222305114U discloses an esterification filtration and slag removal device, including a tank body with an upper chamber at the top. The upper chamber has a stepped surface inside, through which a filter plate is installed. The filter plate has evenly distributed filter holes on its surface. A detachable cover is installed on the top of the upper chamber. An inlet pipe is located on one side of the upper chamber, below the filter plate, and an outlet pipe is located on the other side of the upper chamber, above the filter plate. Material enters the tank body through the inlet pipe, then permeates upwards through the filter plate, and is discharged through the outlet pipe. This patent, installed at the front end of a distillation storage tank, can intercept waste residue in crude ester and has the advantages of simple structure and low cost. However, the sealing of this patent relies entirely on manually tightened bolts, making it difficult to form a uniform and sufficient sealing pressure on large end caps. When the internal pressure increases, the sealing reliability is insufficient, and the risk of leakage increases. Furthermore, the opening of the end cap relies entirely on manual operation of a ring handle. For heavy-duty end caps, this design poses a high operational risk and significant safety hazards. Utility Model Content

[0004] The purpose of this invention is to provide an esterification filtration and slag removal device that can maintain a reliable seal under high temperature and high pressure conditions, while also enabling the safe opening and closing of heavy-duty end caps, thereby improving operational safety and maintenance efficiency.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] An esterification filtration and slag removal device includes a housing and a support for supporting the housing. A filtration unit is disposed inside the housing. The housing is generally arranged in a horizontal cylindrical shape. One end of the housing is closed, and the other end of the housing is provided with an end cap that slides along the axial direction of the housing and can be circumferentially locked. The end of the end cap facing the housing is fixedly connected to the filtration unit, and the end of the end cap away from the housing is connected to a removal component. A fixing ring that can rotate around the axis of the housing is sleeved on the end of the housing near the end cap. A drive cylinder for driving the fixing ring to rotate is provided on the fixing ring. The drive cylinder includes a cylinder body, and a telescopic piston rod is provided at one end of the cylinder body. The end of the cylinder body away from the piston rod is connected to the housing through a hinge seat, and the end of the piston rod away from the cylinder body is connected to the fixing ring.

[0007] Furthermore, the removal assembly includes a guide rail, a slider, and a traction component. The guide rail is fixedly disposed above the housing and its extension direction is parallel to the axis of the housing. The slider is slidably disposed on the guide rail, and the traction component is fixedly disposed between the slider and the end cap.

[0008] Furthermore, a support base is provided on the top of the housing in conjunction with the guide rail.

[0009] Furthermore, the filtration unit includes alternately stacked filter plates, filter frames, and filter cloth, with the filter cloth sandwiched between the filter plates and filter frames.

[0010] Furthermore, the shell is provided with a feed inlet, a discharge outlet, and a circulation port, which are respectively connected to a feed pipeline, a discharge pipeline, and a circulation pipeline.

[0011] Furthermore, the feed pipeline is connected to the circulation pipeline, and a normally closed valve is installed between the feed pipeline and the circulation pipeline.

[0012] Furthermore, a discharge valve is installed on the discharge pipeline, and a circulation valve is installed on the circulation pipeline.

[0013] Furthermore, sampling points and metal hoses are installed on the discharge pipeline.

[0014] Furthermore, a pressure gauge is installed on the casing.

[0015] Furthermore, the shell is made of carbon steel or 304 stainless steel.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention utilizes a drive cylinder to rotate a retaining ring around the housing axis, thereby locking and releasing the end cap. The retaining ring provides a uniform and stable radial clamping force to the end cap, ensuring long-term sealing of the device under high temperature and high pressure conditions, reducing the risk of leakage due to seal failure, and guaranteeing production safety. Simultaneously, the end cap is fixedly connected to the filter unit and cooperates with the removal assembly; when the retaining ring is released, the entire filter unit can be safely removed from the housing along with the end cap, avoiding the high-risk operation of operators directly disassembling and assembling heavy end caps, reducing labor intensity, and improving maintenance safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the shell, support, end cover, fixing ring, drive cylinder, hinge seat, inlet, outlet and circulation port of this utility model.

[0020] Figure 3 This is a partial structural diagram of the end cap, filter plate, filter frame and filter cloth of this utility model;

[0021] In the picture:

[0022] 1. Housing; 2. Support; 3. End cap; 4. Fixing ring; 5. Drive cylinder; 501. Cylinder body; 502. Piston rod; 6. Hinge seat; 7. Guide rail; 8. Sliding component; 9. Traction component; 10. Support seat; 11. Filter plate; 12. Filter frame; 13. Filter cloth; 14. Feed inlet; 15. Discharge outlet; 16. Circulation port; 17. Feed pipeline; 18. Discharge pipeline; 19. Circulation pipeline; 20. Normally closed valve; 21. Discharge valve; 22. Circulation valve. Detailed Implementation

[0023] The present invention will now be described and illustrated in detail with reference to the embodiments.

[0024] Example 1

[0025] like Figure 1-3As shown, the esterification filtration and slag removal device includes a housing 1 and a support 2 for supporting the housing 1. A filtration unit is installed inside the housing 1. The housing 1 is generally arranged in a horizontal cylindrical shape. One end of the housing 1 is closed. The other end of the housing 1 is provided with an end cap 3 that slides along the axial direction of the housing 1 and can be circumferentially locked. The end of the end cap 3 facing the housing 1 is fixedly connected to the filtration unit. The end of the end cap 3 away from the housing 1 is connected to a removal component. A fixing ring 4 that can rotate around the axis of the housing 1 is sleeved on the end of the housing 1 near the end cap 3. A drive cylinder 5 that drives the fixing ring 4 to rotate is provided on the fixing ring 4. The drive cylinder 5 includes a cylinder body 501. A telescopic piston rod 502 is provided at one end of the cylinder body 501. The end of the cylinder body 501 away from the piston rod 502 is connected to the housing 1 through a hinge seat 6. The end of the piston rod 502 away from the cylinder body 501 is connected to the fixing ring 4.

[0026] The removal assembly includes a guide rail 7, a slider 8, and a traction member 9. The guide rail 7 is fixedly disposed above the housing 1 and the extension direction of the guide rail 7 is parallel to the axis of the housing 1. The slider 8 is slidably disposed on the guide rail 7, and the traction member 9 is fixedly disposed between the slider 8 and the end cap 3.

[0027] The top of the housing 1 is fitted with a support base 10 that mates with the guide rail 7.

[0028] The filtration unit includes alternately stacked filter plates 11, filter frames 12 and filter cloth 13, with the filter cloth 13 sandwiched between the filter plates 11 and the filter frames 12.

[0029] The housing 1 is provided with a feed inlet 14, a discharge outlet 15 and a circulation outlet 16, and the feed inlet 14, the discharge outlet 15 and the circulation outlet 16 are respectively connected to a feed pipe 17, a discharge pipe 18 and a circulation pipe 19.

[0030] The feed line 17 is connected to the circulation line 19 and a normally closed valve 20 is installed between the feed line 17 and the circulation line 19.

[0031] A discharge valve 21 is installed on the discharge pipeline 18, and a circulation valve 22 is installed on the circulation pipeline 19.

[0032] Sampling points and metal hoses are installed on the discharge pipe 18.

[0033] A pressure gauge is installed on the housing 1.

[0034] The shell 1 is made of carbon steel or 304 stainless steel.

[0035] Working principle and process:

[0036] I. Equipment Preparation and Locking:

[0037] First, the filter unit is placed into the inner cavity of the housing 1, and the end cap 3 is pushed in axially to cover the opening of the housing 1. Then, the drive cylinder 5 is activated, and its piston rod 502 retracts, driving the retaining ring 4 to rotate around the axis of the housing 1 to the locking position, thereby locking the end cap 3 circumferentially and providing a uniform radial clamping force to form a reliable seal.

[0038] II. Filtering Operation:

[0039] Keep the normally closed valve 20 closed, open the valve on the feed line 17, and the feed pump will pump the crude ester liquid from the stripping kettle into the housing 1 through the feed port 14. The crude ester liquid passes through the filter cloth 13, and solid impurities are trapped in the filter frame 12 to form a filter cake, while the clarified ester liquid passes through the guide groove of the filter plate 11 and collects.

[0040] III. Circulation Filtration and Discharge:

[0041] During initial filtration, the circulation valve 22 on the circulation pipeline 19 can be opened while the discharge valve 21 is closed, allowing the filtrate to flow back into the housing 1 through the circulation port 16 until the filtrate is clear. Once the requirement is met, the circulation valve 22 is closed and the discharge valve 21 is opened, and the qualified ester solution is discharged through the discharge pipeline 18.

[0042] IV. Slag Removal:

[0043] When the filtration pressure differential increases to the point where cleaning is required, stop feeding. Drain the remaining ester liquid in the shell 1 through the discharge pipe 18.

[0044] Operate the drive cylinder 5 to extend its piston rod 502, driving the retaining ring 4 to rotate in the opposite direction to the release position, thus releasing the lock on the end cover 3. The traction device acts on the sliding member 8, which moves along the guide rail 7, thereby horizontally moving the end cover 3 together with the filter unit fixedly connected to it out of the housing 1.

[0045] At the external workstation, the removed filter unit is cleaned of the filter cake or the filter cloth 13 is replaced. After cleaning, the filter unit is returned to the housing 1 using the removal assembly and locked and sealed by the drive cylinder 5, ready for the next round of filtration.

Claims

1. An esterification filtration and slag removal device, comprising a housing (1) and a support (2) for supporting the housing (1), wherein a filtration unit is disposed inside the housing (1), characterized in that, The housing (1) is generally arranged in a horizontal cylindrical shape. One end of the housing (1) is closed. The other end of the housing (1) is provided with an end cap (3) that slides along the axial direction of the housing (1) and can be locked circumferentially. The end of the end cap (3) facing the housing (1) is fixedly connected to the filter unit. The end of the end cap (3) away from the housing (1) is connected to a removal component. The end of the housing (1) near the end cap (3) is fitted with a fixed ring (4) that can rotate around the axis of the housing (1). The fixed ring (4) is provided with a drive cylinder (5) that drives the fixed ring (4) to rotate. The drive cylinder (5) includes a cylinder body (501). One end of the cylinder body (501) is provided with a telescopic piston rod (502). The end of the cylinder body (501) away from the piston rod (502) is connected to the housing (1) through a hinge seat (6). The end of the piston rod (502) away from the cylinder body (501) is connected to the fixed ring (4).

2. The esterification filtration and slag removal device according to claim 1, characterized in that, The removal assembly includes a guide rail (7), a slider (8), and a traction member (9). The guide rail (7) is fixedly disposed above the housing (1) and the extension direction of the guide rail (7) is parallel to the axis of the housing (1). The slider (8) is slidably disposed on the guide rail (7), and the traction member (9) is fixedly disposed between the slider (8) and the end cap (3).

3. The esterification filtration and slag removal device according to claim 2, characterized in that, The top of the housing (1) is fitted with a support base (10) that matches the guide rail (7).

4. The esterification filtration and slag removal device according to claim 1, characterized in that, The filtration unit includes alternately stacked filter plates (11), filter frames (12) and filter cloth (13), with the filter cloth (13) sandwiched between the filter plates (11) and the filter frames (12).

5. The esterification filtration and slag removal device according to claim 1, characterized in that, The housing (1) is provided with a feed inlet (14), a discharge outlet (15) and a circulation outlet (16), and the feed inlet (14), the discharge outlet (15) and the circulation outlet (16) are respectively connected to a feed pipe (17), a discharge pipe (18) and a circulation pipe (19).

6. The esterification filtration and slag removal device according to claim 5, characterized in that, The feed line (17) is connected to the circulation line (19), and a normally closed valve (20) is provided between the feed line (17) and the circulation line (19).

7. The esterification filtration and slag removal device according to claim 5, characterized in that, A discharge valve (21) is installed on the discharge pipeline (18), and a circulation valve (22) is installed on the circulation pipeline (19).

8. The esterification filtration and slag removal device according to claim 5, characterized in that, Sampling points and metal hoses are installed on the discharge pipeline (18).

9. The esterification filtration and slag removal device according to claim 1, characterized in that, A pressure gauge is provided on the housing (1).

10. The esterification filtration and slag removal device according to claim 1, characterized in that, The shell (1) is made of carbon steel or 304 stainless steel.

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