Tail gas treater for polyacrylamide production

Abstract

The utility model relates to a polyacrylamide production tail gas treater, which relates to the field of production equipment, and comprises a tank body, gas inlet pipes, filter screens and a guide rod, the filter screens made of a plurality of cloth bags are inserted into the tank body, a plurality of gas inlet pipes are fixedly connected onto the tank body and inserted into the filter screens, and the gas inlet pipes alternately introduce gas into different filter screens; the guide rods are annularly distributed in the filter screen at intervals, the guide rods move up and down to scrape off impurities on the filter screen, and the self-cleaning filter screen has the advantages that gas can be filtered, self-cleaning can be achieved, the cleaning frequency is reduced, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of production equipment technology, and in particular to a polyacrylamide production exhaust gas processor. Background Technology

[0002] Currently, polyacrylamide is produced by polymerizing an acrylamide solution with an initiator. During the reaction, some unreacted monomers or water evaporate, producing exhaust gas that carries dusty polymer particles and solid impurities such as sulfates from the initiator decomposition. Before subsequent harmless treatment of the exhaust gas, it must be filtered to separate these solid impurities. Currently, bag filters are the most effective dust collectors, but the accumulated impurities on the bags require frequent replacement and cleaning, resulting in a heavy workload for workers.

[0003] Therefore, to address the above shortcomings, there is a need to provide a polyacrylamide production exhaust gas processor. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The technical problem to be solved by this utility model is how to extend the service life of cloth bags and reduce the frequency of disassembly and cleaning by workers.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, this utility model provides a polyacrylamide production exhaust gas processor, including a tank, an air inlet pipe, a filter screen, and guide rods. Several filter screens made of cloth bags are inserted into the tank. Several air inlet pipes are fixed to the tank and inserted into the filter screens. The air inlet pipes alternately circulate air into different filter screens. Several guide rods are distributed in a ring at intervals inside the filter screens. The guide rods move up and down to scrape off impurities on the filter screens.

[0008] As a further explanation of this utility model, preferably, a disc-shaped support plate is fixedly connected inside the tank, and a plurality of holes are spaced apart on the support plate. A metal ring is provided at the opening end of the filter screen, and the filter screen extends into the hole and the metal ring abuts against the support plate.

[0009] As a further explanation of this utility model, preferably, semi-circular lifting rings are fixedly connected at intervals on the metal ring to lift the filter screen out for cleaning.

[0010] As a further explanation of this utility model, preferably, an exhaust pipe is fixedly connected to the bottom of the tank, the diameter of the exhaust pipe is larger than the diameter of the inlet pipe, and gas is sprayed into the exhaust pipe.

[0011] As a further explanation of this utility model, preferably, a number of annular transverse rings are fixedly connected at intervals along the length of the guide rod, the outer diameter of the transverse rings being equal to the inner diameter of the filter screen, and the width of the transverse rings being less than the width of the guide rod.

[0012] As a further explanation of this utility model, preferably, a hemispherical ball support is fixedly connected to the bottom of the guide rod. The ball support is a thin plate shell with the same thickness as the guide rod. The spherical surface of the ball support contacts the filter screen to receive impurities and support the guide rod.

[0013] (III) Beneficial Effects

[0014] The above-mentioned technical solution of this utility model has the following advantages:

[0015] This invention extends the dust removal time by setting multiple sets of cloth bags in the tank to perform dust removal work alternately. After a stage of dust removal, the impurities adsorbed on the cloth bags are blown off by back-blowing. At the same time, the cleaning effect is further improved by the scraping of guide rods and horizontal rings. This allows the cloth bags, which originally needed to be changed and cleaned once a day, to be changed and cleaned once every four or five days, which greatly reduces the workload of workers. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the tank interior of this utility model;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 yes Figure 2 A magnified view of A in the middle.

[0019] In the diagram: 1. Tank body; 11. Exhaust pipe; 2. Inlet pipe; 3. Filter screen; 31. Lifting ring; 4. Guide rod; 41. Ball support; 42. Horizontal ring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] A polyacrylamide-based exhaust gas processor, combined with Figure 1 , Figure 2 It includes a tank body 1, an air inlet pipe 2, a filter screen 3, and guide rods 4. Four filter screens 3 made of cloth bags are inserted inside the tank body 1. Four air inlet pipes 2 are fixed to the tank body 1 and inserted into the filter screens 3. Several guide rods 4 are distributed in a ring-shaped interval inside the filter screens 3.

[0022] Combination Figure 1 , Figure 2The tank body 1 is a cylindrical shell with a flange on the upper part for connecting to the top cover via bolts. The air inlet pipes 2 are fixed to the top cover. Four air inlet pipes 2 are connected to the reactor exhaust pipe via multiple solenoid valves. The solenoid valves control the air inlet pipes 2 to alternately ventilate different filters 3. A disc-shaped support plate is fixed inside the tank body 1. The support plate has four holes spaced apart. The open end of each filter 3 has a metal ring. The filter 3 extends into the hole, and the metal ring abuts against the support plate, allowing the filter 3 to be hoisted into the tank body 1. Simultaneously, a column is provided on the top cover. When connected to the tank body 1, the column presses against the metal ring to prevent the filter 3 from detaching from the support plate during backflushing. Semi-circular lifting rings 31 are fixed to the metal ring at intervals. When cleaning the filter 3 is required, the top cover can be removed, and the hook from the crane can be hooked onto the lifting rings 31 to lift the filter 3 out for cleaning.

[0023] Combination Figure 1 , Figure 2 A vent pipe 11 is fixedly connected to the bottom of the tank body 1. The diameter of the vent pipe 11 is larger than that of the inlet pipe 2. An air pump is connected to the vent pipe 11 via a solenoid valve to allow gas to be sprayed into the vent pipe 11 at a pressure not less than 0.1 MPa. During filtration, air is introduced into one of the inlet pipes 2, and the gas delivery pipe on the inlet pipe 2 is opened, allowing the exhaust gas to flow through the filter screen 3 to the vent pipe 11. At this time, solid impurities adhere to the filter screen 3. When the output pressure of the vent pipe 11 decreases, the other inlet pipe 2 is switched to allow air to enter, thus achieving continuous filtration. At the same time, the air flowing out of the other filter screen 3 after switching can also blow against the adjacent filter screen 3, achieving a preliminary backflushing effect.

[0024] Combination Figure 2 , Figure 3 The guide rod 4 is a long, thin metal rod. A hemispherical ball support 41 is fixed to the bottom of the guide rod 4. The ball support 41 is a thin plate shell with the same thickness as the guide rod 4. The spherical surface of the ball support 41 contacts the bottom of the filter screen 3 to support the guide rod 4. Several annular transverse rings 42 are fixed at intervals along the length of the guide rod 4. The outer diameter of the transverse rings 42 is equal to the inner diameter of the filter screen 3, and the width of the transverse rings 42 is smaller than the width of the guide rod 4. After the first stage of filtration is completed, the feed and air outlet are turned off, and then the air pump is switched to supply air into the tank 1. At this time, the pressurized gas flows back into the filter screen 3 to blow away the impurities blocking the filter bag pores, thus achieving the function of pneumatic cleaning. At the same time, the ball holder 41 shakes upward under the push of the gas, and the horizontal ring 42 and guide rod 4 are misaligned with the filter bag, which can scrape off the stubborn impurities and further improve the cleaning effect. Meanwhile, the impurities blown off can also fall into the ball holder 41 for collection, and can also prevent the impurities deposited at the bottom of the filter screen 3 from being blown up during backflushing, which would cause a large number of impurities to be stirred up and affect the cleaning effect.

[0025] In summary, the above solution can achieve both preliminary filtration of exhaust gas and pneumatic cleaning of the filter bag, eliminating the need for workers to frequently disassemble, clean, and install the cover and filter screen, thus significantly reducing the workload of workers.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A polyacrylamide production exhaust gas processor, characterized in that: It includes a tank (1), an air inlet pipe (2), a filter screen (3) and guide rods (4). Several filter screens (3) made of cloth bags are inserted into the tank (1). Several air inlet pipes (2) are fixed to the tank (1) and inserted into the filter screens (3). The air inlet pipes (2) alternately ventilate into different filter screens (3). Several guide rods (4) are distributed in a ring-shaped interval in the filter screens (3). The guide rods (4) move up and down to scrape off the impurities on the filter screens (3).

2. The polyacrylamide production exhaust gas processor according to claim 1, characterized in that: The tank body (1) is fixed with a disc-shaped support plate. Several holes are spaced apart on the support plate. The filter screen (3) has a metal ring at the open end. The filter screen (3) extends into the hole and the metal ring abuts against the support plate.

3. A polyacrylamide production exhaust gas processor according to claim 2, characterized in that: Semi-circular lifting rings (31) are fixed to the metal ring at intervals to lift the filter screen (3) out for cleaning.

4. A polyacrylamide production exhaust gas processor according to claim 3, characterized in that: The bottom of the tank (1) is fixed with an exhaust pipe (11), the diameter of the exhaust pipe (11) is larger than the diameter of the inlet pipe (2), and gas is sprayed into the exhaust pipe (11).

5. A polyacrylamide production exhaust gas processor according to claim 4, characterized in that: The guide rod (4) has several annular horizontal rings (42) fixed at intervals along its length. The outer diameter of the horizontal rings (42) is equal to the inner diameter of the filter screen (3), and the width of the horizontal rings (42) is less than the width of the guide rod (4).

6. A polyacrylamide production exhaust gas processor according to claim 5, characterized in that: The bottom of the guide rod (4) is fixed with a hemispherical ball holder (41). The ball holder (41) is a thin plate shell with the same thickness as the guide rod (4). The spherical surface of the ball holder (41) contacts the filter screen (3) to receive impurities and support the guide rod (4).

Images