High-molecular-weight polyacrylamide production filtering device

Abstract

The utility model relates to a high molecular weight polyacrylamide production filter device, which relates to the technical field of polyacrylamide production, and comprises a filter tank and a filter block, the filter block is provided with a plurality of filter holes, the filter tank is provided with a feed pipe and a discharge port, a fixed block is arranged in the filter tank, the filter tank is provided with a movable cylinder, and the movable cylinder is provided with a movable cylinder. A movable rod is arranged on a piston rod of the movable air cylinder, the movable rod is arranged in the filtering tank, the movable rod is connected with a filtering block, a fixing groove is formed in the bottom wall of the fixing block, and the filtering block is inserted into the fixing groove. The device has the effect of improving the replacement convenience of the activated carbon.

Description

Technical Field

[0001] The utility model relates to the technical field of polyacrylamide production, in particular to a high molecular weight polyacrylamide production filtering device. Background Art

[0002] Polyacrylamide is a linear high molecular polymer, and its products are mainly divided into two forms: dry powder and colloid. According to its average molecular weight, it can be divided into three categories: low molecular weight (<1 million), medium molecular weight (2-4 million) and high molecular weight (>7 million). According to its structure, it can be divided into non-ionic, anionic and cationic. Anionic types are mostly hydrolyzates of PAM (HPAM). The main chain of polyacrylamide carries a large number of amide groups, which are highly chemically active. It can be modified to produce many polyacrylamide derivatives. The products have been widely used in papermaking, mineral processing, oil production, metallurgy, building materials, sewage treatment and other industries. Polyacrylamide has been widely used as a lubricant, suspending agent, clay stabilizer, oil displacement agent, fluid loss reducer and thickener in drilling, acidizing, fracturing, water plugging, cementing, secondary oil recovery and tertiary oil recovery. It is an extremely important oilfield chemical.

[0003] During the production of high molecular weight polyacrylamide, impurities in the hydrolyzed raw materials will affect the activity of the acrylamide monomer, which is not conducive to the preparation of high molecular weight polyacrylamide. In the prior art, a filter screen is often set in the tank body of the filter tank, and activated carbon is filled on the filter screen. During filtration, the raw material liquid is poured into the filter tank for adsorption filtration through the activated carbon.

[0004] However, in actual use, after long-term use, the activated carbon needs to be replaced. In the prior art, when replacing it, it is only necessary to disassemble the filter and take the filter out of the filter tank, reinstall the fixed filter after taking out the originally used activated carbon, and then fill the activated carbon. When the filter needs to be disassembled and cleaned, it can be done together, but the cleaning cycle of the filter and the replacement cycle of the activated carbon are not consistent. When the filter does not need to be cleaned, the process of disassembling and installing the filter adds the step of replacing the activated carbon, and the operation of replacing the activated carbon is more cumbersome. Utility Model Content

[0005] In order to improve the convenience of activated carbon replacement, the present application provides a high molecular weight polyacrylamide production filtration device.

[0006] The high molecular weight polyacrylamide production filtration device provided in this application adopts the following technical solution:

[0007] A high molecular weight polyacrylamide production filtration device comprises a filter tank and a filter block, wherein the filter block is provided with a plurality of filter holes, the filter tank is provided with a feed pipe and a discharge port, a fixed block is provided inside the filter tank, a movable cylinder is provided on a piston rod of the movable cylinder, the movable rod is provided inside the filter tank, the movable rod is connected to the filter block, a fixed groove is provided on the bottom wall of the fixed block, and the filter block is inserted into the fixed groove.

[0008] By adopting the above technical solution, the movable cylinder is a multi-stage cylinder, the size of the filter block is smaller than the inner diameter of the filter tank, when the filter block is inserted into the fixed groove of the bottom wall of the fixed block, the surface of the filter block and the fixed block cover the entire cross-section of the filter tank, the activated carbon is put into the filter tank through the feed pipe, the activated carbon falls on the filter block and the fixed block, and then the liquid raw material is put in through the feed pipe, after the activated carbon absorbs impurities in the raw material, the raw material passes through the filter hole on the filter block and leaves the filter tank through the discharge port, and the filtration is completed. When the activated carbon needs to be replaced after long-term use, the movable cylinder is started to drive the movable rod to move downward, so that the filter block is separated from and away from the fixed groove on the fixed block. At this time, there is a certain distance between the filter block and the fixed block. At this time, the activated carbon accumulated on the surface of the filter block falls between the filter block and the fixed block, and then the activated carbon leaves the filter block through the discharge port, and then the movable cylinder is started to drive the movable rod to move upward so that the filter block is inserted into the fixed groove on the fixed block, and then new activated carbon is filled in through the feed pipe to complete the replacement. The filter block does not need to be disassembled and installed as a whole, the steps are reduced, and the convenience of replacing the activated carbon is improved.

[0009] Preferably, the filter tank is provided with a feed inlet, and the filter tank is detachably provided with a feed inlet cover, and the feed inlet cover can cover the feed inlet.

[0010] By adopting the above technical solution, activated carbon is added through the feed port, so that the activated carbon input path is separated from the liquid raw material. At the same time, multiple feed ports can be set to facilitate the rapid addition of new activated carbon, further improving the convenience of activated carbon replacement. At the same time, the feed port is covered by a feed cover to reduce the possibility of impurities entering the filter tank through the feed port.

[0011] Preferably, the feed pipe is provided with a feed valve, and the filter tank is detachably provided with a discharge cover that can cover the discharge port.

[0012] By adopting the above technical solution, the feed valve is used to close the feed pipe when feeding is not needed, and the discharge port is closed by the discharge cover when filtering is not performed, thereby reducing the possibility of impurities entering the filter tank and improving the overall cleanliness of the filtration.

[0013] Preferably, the filter tank is provided with a first nitrogen pipe and a second nitrogen pipe, the first nitrogen pipe is provided with a first nitrogen valve, and the second nitrogen pipe is provided with a second nitrogen valve.

[0014] By adopting the above technical scheme, after the filter tank is closed by the feed valve and the discharge cover, the first nitrogen valve and the second nitrogen valve are started, nitrogen is filled into the filter tank through the first nitrogen pipe, and the air in the filter tank is discharged through the second nitrogen pipe, and the filter tank is replaced with nitrogen, thereby reducing the impact of impurities in the air on the production filtration of polyacrylamide.

[0015] Preferably, the surface of the filter block is provided with a first inclined surface, and the surface of the fixing block is provided with a second inclined surface.

[0016] By adopting the above technical solution, when replacing the activated carbon, after the filter block descends and detaches from the fixing groove on the fixing block, the second inclined surface on the fixing block guides the activated carbon to the surface of the filter block, and the first inclined surface on the surface of the filter block guides the activated carbon to the space between the filter block and the fixing block, so that the activated carbon falls into the discharge port. By setting the first inclined surface and the second inclined surface to guide the activated carbon, the process of clearing the activated carbon out of the filter tank is further facilitated, while the possibility of the activated carbon remaining on the surface of the fixing block and the filter block is reduced.

[0017] Preferably, the fixing block is arranged in an annular shape, the second inclined surface is communicated with the inner wall of the fixing block, the fixing groove is communicated with the inner wall of the fixing block, and the top wall of the fixing groove is arranged obliquely and can abut against the first inclined surface.

[0018] By adopting the above technical solution, setting the fixed block in a ring shape can better cooperate with the filter block to close the filter tank for filtration. At the same time, the inner wall of the fixed groove is inclined and abuts against the first inclined surface, which improves the stability of the filter block after being inserted into the fixed groove, and also improves the fitting area between the inner wall of the fixed groove and the filter block, increases the sealing performance, and reduces the possibility of activated carbon falling through the gap between the fixed groove and the filter block during filtration.

[0019] Preferably, the filter block can pass through the discharge port.

[0020] By adopting the above technical solution, when the filter screen needs to be cleaned, the moving cylinder can be started to drive the moving rod to descend, so that the filter block descends through the discharge port. At this time, the filter block can be cleaned, and the operation is simple and convenient.

[0021] Preferably, the moving rod is provided with mounting bolts, and the mounting bolts are used to connect and mount the filter block on the moving rod.

[0022] By adopting the above technical solution, when the mobile cylinder is started to drive the filter block to descend, the filter tank can be entered to loosen the mounting bolts to remove the filter block from the mobile rod, and the filter block can be taken out through the discharge port for cleaning. In this way, the stroke of the mobile cylinder does not need to be set too large, and a suitable mobile cylinder can be selected to save costs.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By setting the filter tank, filter block, discharge port, feed port, fixed block, fixed groove, movable cylinder and movable rod, when the activated carbon in the filter tank needs to be replaced after long-term use, the movable cylinder is started to drive the movable rod to move downward, so that the filter block is separated from the fixed groove on the fixed block, and the activated carbon can fall from the space between the fixed block and the filter block and separate from the filter tank from the discharge port, and then the movable cylinder is started to drive the filter block to move upward and insert into the fixed groove, so that the filter block and the fixed block fill the cross section of the filter tank, so that the new activated carbon is put into the filter tank through the feed port, and the activated carbon falls on the filter block or the fixed block to complete the replacement, and the filter block does not need to be disassembled and installed as a whole, which simplifies the steps and improves the convenience of activated carbon replacement;

[0025] 2. By setting the feed pipe, feed valve and discharge cover, open the feed valve, and put the liquid raw material into the filter tank from the feed pipe. At the same time, the feed pipe can be closed by the feed valve, and the discharge port can be covered and closed by the feed cover, thereby closing the filter tank and reducing the possibility of impurities entering the filter tank for filtering cleanliness;

[0026] 3. By setting the first inclined surface and the second inclined surface, when the activated carbon in the filter tank is cleared, after the filter block drops out of the fixed groove, the second inclined surface on the fixed block guides the activated carbon to the surface of the filter block, and the first inclined surface on the filter block guides the activated carbon to the gap between the filter block and the fixed block, so that the activated carbon can fall into the discharge port more conveniently, while reducing the possibility of the activated carbon remaining on the surface of the fixed block and the filter block. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an overall schematic diagram of the high molecular weight polyacrylamide production filtration device provided in the examples of the present application.

[0028] Figure 2 It is a cross-sectional schematic diagram of a high molecular weight polyacrylamide production filtration device provided in an embodiment of the present application.

[0029] Explanation of the reference numerals: 1. filter tank; 11. bracket; 12. feed pipe; 121. feed valve; 13. feed inlet; 131. feed cover; 14. discharge port; 141. discharge cover; 15. first nitrogen pipe; 151. first nitrogen valve; 16. second nitrogen pipe; 161. second nitrogen valve; 2. filter block; 21. filter hole; 22. first inclined surface; 3. fixing block; 31. fixing groove; 32. second inclined surface; 4. moving cylinder; 41. moving rod; 42. mounting bolt. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-2 This application is described in further detail.

[0031] The present application example discloses a high molecular weight polyacrylamide production filtration device. Figure 1 and Figure 2 , which comprises a filter block 2 and a cylindrical filter tank 1, wherein a bracket 11 is fixedly provided on the bottom wall of the filter tank 1, and a plurality of filter holes 21 are penetrated on the surface of the filter block 2. A feed pipe 12 is integrally provided on the filter tank 1, two feed ports 13 are provided on the top wall of the filter tank 1, and a discharge port 14 is provided on the bottom wall of the filter tank 1. A mobile cylinder 4 is fixedly provided on the outer top wall of the filter tank 1, and the piston rod of the mobile cylinder 4 penetrates the top wall of the filter tank 1 and enters the filter tank 1. A mobile rod 41 is fixedly provided at the bottom of the piston rod of the mobile cylinder 4 by bolts, and the mobile rod 41 is provided in the filter tank 1. A mounting bolt 42 is provided at the bottom of the mobile rod 41, and the mounting bolt 42 mounts the filter block 2 at the bottom of the mobile rod 41, and the filter block 2 can pass through the discharge port 14. An annular fixed block 3 is integrally fixedly provided on the inner wall of the filter tank 1, and a fixed groove 31 communicating with the inner wall of the fixed block 3 is provided on the bottom wall of the fixed block 3, and the filter block 2 can be inserted into the fixed groove 31. When the activated carbon needs to be replaced, the moving cylinder 4 is started to drive the moving rod 41 to move downward, so that the filter block 2 withdraws from the fixed groove 31, and the activated carbon falls from the space between the filter block 2 and the fixed block 3 and leaves the filter tank 1 from the discharge port 14. Then, the moving cylinder 4 is started to drive the moving rod 41 to move upward so that the filter block 2 is inserted into the fixed groove 31. At this time, the filter block 2 cooperates with the fixed block 3 to separate the filter tank 1. New activated carbon is put into the filter tank 1 from the feed port 13, and the activated carbon falls on the fixed block 3 and the filter block 2. For replacement, there is no need to disassemble and install the filter block 2, which reduces the steps and improves the convenience of replacing the activated carbon.

[0032] To improve filtration cleanliness, refer to Figure 1 and Figure 2 The top wall of the filter tank 1 is detachably provided with a feed cover 131 through a thread, and the feed cover 131 can cover the feed port 13. The bottom wall of the filter tank 1 is detachably provided with a discharge cover 141 through a thread, and the discharge cover 141 can cover the discharge port 14. A feed valve 121 is provided on the feed pipe 12. The filter tank 1 is integrally provided with a first nitrogen pipe 15 and a second nitrogen pipe 16, and the first nitrogen pipe 15 is higher than the second nitrogen pipe 16. The first nitrogen pipe 15 is provided at a first nitrogen valve 151, and the second nitrogen pipe 16 is provided with a second nitrogen valve 161. The filter tank 1 can be closed by the feed cover 131, the discharge cover 141 and the feed valve 121 to reduce the possibility of impurities entering the filter tank 1 and affecting the filtration cleanliness. At the same time, after closing, the first nitrogen valve 151 and the second nitrogen valve 161 are opened, nitrogen is filled from the first nitrogen pipe 15, and the original air in the filter tank 1 is discharged from the second nitrogen pipe 16 to reduce the influence of air on the preparation of polyacrylamide.

[0033] To reduce the possibility of activated carbon residue, refer to Figure 1and Figure 2 The surface of the filter block 2 is provided with a first inclined surface 22 around the moving rod 41, and the surface of the fixed block 3 is provided with a second inclined surface 32 which is in communication with the inner wall of the fixed block 3. The first inclined surface 22 is in communication with the second inclined surface 32, and the top wall of the fixed groove 31 is inclined and can be adapted to abut against the first inclined surface 22. After the filter block 2 is lowered and separated from the fixed groove 31, the activated carbon on the fixed block 3 is guided to the surface of the filter block 2 via the second inclined surface 32, and the first inclined surface 22 on the filter block 2 continues to guide the activated carbon to the space between the filter block 2 and the fixed block 3, so that the activated carbon falls into the discharge port 14 to be removed from the filter tank 1, and at the same time reduces the possibility of the activated carbon remaining on the surface of the fixed block 3 and the filter block 2.

[0034] The implementation principle of the high molecular weight polyacrylamide production filtration device of the embodiment of the present application is as follows: when replacing the activated carbon, the moving cylinder 4 is started to drive the moving rod 41 to move downward, so that the filter block 2 is separated from the fixed groove 31, and a space is vacated between the filter block 2 and the fixed block 3. At this time, the first inclined surface 22 guides the activated carbon on the fixed block 3 to the surface of the filter block 2, and the second inclined surface 32 on the filter block 2 continues to guide the activated carbon to slide from the space between the filter block 2 and the fixed block 3, so that the activated carbon is removed from the filter tank 1 through the discharge port 14. After that, the moving cylinder 4 is started to drive the moving rod 41 to move upward, so that the filter block 2 is inserted into the fixed groove 31. At this time, new activated carbon is put into the filter tank 1 through the feed port 13 so that the activated carbon falls on the fixed block 3 and the filter block 2, and the replacement is completed. The present application separates the activated carbon replacement and the filter block 2 cleaning, simplifies the steps of activated carbon replacement, and improves the convenience of activated carbon replacement.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high molecular weight polyacrylamide production filtration device, comprising a filtration tank (1) and a filtration block (2), wherein the filtration block (2) is provided with a plurality of filtration holes (21), and the filtration tank (1) is provided with a feed pipe (12) and a discharge port (14), characterized in that: The filter tank (1) is provided with a fixed block (3), the filter tank (1) is provided with a movable cylinder (4), a movable rod (41) is provided on a piston rod of the movable cylinder (4), the movable rod (41) is provided in the filter tank (1), the movable rod (41) is connected to the filter block (2), a fixed groove (31) is provided on the bottom wall of the fixed block (3), and the filter block (2) is inserted into the fixed groove (31).

2. The high molecular weight polyacrylamide production filtration device according to claim 1, characterized in that: The filter tank (1) is provided with a material inlet (13), and the filter tank (1) is detachably provided with a material inlet cover (131), and the material inlet cover (131) can cover the material inlet (13).

3. The high molecular weight polyacrylamide production filtration device according to claim 1, characterized in that: The feed pipe (12) is provided with a feed valve (121), and the filter tank (1) is detachably provided with a discharge cover (141) capable of covering the discharge port (14).

4. The high molecular weight polyacrylamide production filtration device according to claim 3, characterized in that: The filter tank (1) is provided with a first nitrogen pipe (15) and a second nitrogen pipe (16); the first nitrogen pipe (15) is provided with a first nitrogen valve (151); and the second nitrogen pipe (16) is provided with a second nitrogen valve (161).

5. The high molecular weight polyacrylamide production filtration device according to claim 1, characterized in that: The surface of the filter block (2) is provided with a first inclined surface (22), and the surface of the fixing block (3) is provided with a second inclined surface (32).

6. The high molecular weight polyacrylamide production filtration device according to claim 5, characterized in that: The fixing block (3) is arranged in an annular shape, the second inclined surface (32) is communicated with the inner wall of the fixing block (3), the fixing groove (31) is communicated with the inner wall of the fixing block (3), and the top wall of the fixing groove (31) is arranged obliquely and can abut against the first inclined surface (22).

7. The high molecular weight polyacrylamide production filtration device according to claim 1, characterized in that: The filter block (2) can pass through the discharge port (14).

8. The high molecular weight polyacrylamide production filtration device according to claim 7, characterized in that: The moving rod (41) is provided with a mounting bolt (42), and the mounting bolt (42) is used to connect and mount the filter block (2) on the moving rod (41).

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