A tail gas absorption tower for chemical production

Abstract

This utility model discloses a tail gas absorption tower for chemical production, relating to the field of chemical production technology. The tower includes an absorption tower with several viewing windows fixedly connected in an equidistant array at its front end. A flow divider is installed on the lower side of the outer wall of the absorption tower, and an inlet pipe is installed on the left side of the flow divider. An impurity filter assembly is installed at the left end of the inlet pipe. An outlet pipe is fixedly connected to the top of the inner wall of the absorption tower. A valve is installed on the outer wall of the drain pipe. A reactant tank is fixedly connected to the top of a fixed plate. A pumping pipe is fixedly connected to the input port of a water pump, and a spray assembly is installed at the output port of the water pump. This utility model connects the impurity filter assembly to the tail gas pipe via a flange pipe, so that when the tail gas is discharged into the absorption tower through the impurity filter assembly, the filter screen in the impurity filter assembly filters the impurity particles in the tail gas, preventing impurities from entering the absorption tower.

Description

Technical Field

[0001] This utility model relates to the field of chemical production technology, specifically to a tail gas absorption tower for chemical production. Background Technology

[0002] Chemical production refers to the industrial process of converting raw materials into chemical products through chemical processes. It encompasses multiple fields such as petrochemicals, fine chemicals, and biochemicals, and is characterized by a long industrial chain, high technology intensity, and stringent environmental protection requirements. The main function of tail gas absorption towers used in chemical production is to remove harmful gases and particulate matter from industrial waste gases, protecting the environment and conserving energy. Tail gas absorption towers work by having a sprayed absorbent interact with pollutants in the waste gas, causing them to be absorbed or adhere to the surface of the absorbent, thereby achieving the purpose of purifying the waste gas. However, existing technologies have the following problems:

[0003] When the tail gas from chemical production is discharged into the tail gas absorption tower, it contains a lot of impurities and particulate matter. After the absorbent liquid comes into contact with the impurities in the tail gas, the impurities are trapped in the absorption tower. When there are too many impurities in the absorption tower, it will affect the normal operation of the equipment. Secondly, since the tail gas is simply introduced from the bottom of the absorption tower, it will flow directly upward along the inner cavity of the absorption tower and cannot fully contact the reactant, resulting in poor reaction effect between the tail gas and the reactant. Utility Model Content

[0004] This invention provides a tail gas absorption tower for chemical production to solve the problems existing in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A tail gas absorption tower for chemical production includes an absorption tower with several viewing windows fixedly connected in an equidistant array at its front end. A flow-diverting assembly is provided on the lower side of the outer wall of the absorption tower, and the inner wall of the flow-diverting assembly extends into the interior of the absorption tower. An inlet pipe is provided on the left side of the flow-diverting assembly, and an impurity filter assembly is provided at the left end of the inlet pipe. An outlet pipe is fixedly connected to the top of the interior of the absorption tower. A drain pipe is fixedly connected to the bottom of the front end of the absorption tower near the flow-diverting assembly, and a valve is provided on the outer wall of the drain pipe. A fixing plate is fixedly connected to the right side of the outer wall of the absorption tower, and a reaction tank is fixedly connected to the top of the fixing plate. A water pump is fixedly connected to the top of the reaction tank. A suction pipe is fixedly connected to the input port of the water pump, and the bottom of the outer wall of the suction pipe extends into the interior of the reaction tank. A spray assembly is provided at the output port of the water pump, and the top of the outer wall of the spray assembly extends into the interior of the absorption tower.

[0007] A further improvement of this utility model is that the impurity filtration assembly includes two air inlet hoppers, two positioning rings, a flange pipe, an annular frame, a filter screen, several screws, several gaskets, and several nuts. The inner walls of the two positioning rings are respectively fixedly connected to the outer walls of the opposite sides of the two air inlet hoppers. One end of the flange pipe is fixedly connected to the port of the left air inlet hopper. The outer wall of the filter screen is fixedly connected to the inner wall of the annular frame. One end of the several screws is fixedly connected in an annular array to the left end of the right positioning ring. The annular frame and the left positioning ring have several insertion holes in an annular array on their surfaces that are adapted to the screws.

[0008] A further improvement of this utility model is that: the port of the air intake bucket on the right side is fixedly connected to one end of the air intake pipe, the inner wall of the gasket is sleeved with the outer wall of the screw, and the inner wall of the nut is threadedly connected to the outer wall of the screw.

[0009] A further improvement of this utility model is that: sealing rings are fixedly connected to the inner sides of the left and right ends of the annular frame near the insertion holes, and the inner sides of the two positioning rings near the screws are provided with grooves that are compatible with the sealing rings.

[0010] A further improvement of the present invention is that the spraying assembly includes a conveying pipe, a water collection box, and several atomizing nozzles. The middle side of the top of the water collection box is fixedly connected to one end of the conveying pipe. The connecting ends of several atomizing nozzles are fixedly connected in a ring array to the bottom of the water collection box. The outer wall of the conveying pipe extends through the interior of the absorption tower and is fixedly connected to each other. The exterior of the water collection box is located on the upper side of the interior of the absorption tower.

[0011] A further improvement of this utility model is that: two fixed frames are fixedly connected to the inner wall of the absorption tower near the flow distribution component and the spray component, and a dispersion plate is fixedly connected to the inner wall of both fixed frames. The mesh size of the holes in the upper dispersion plate is greater than that in the lower dispersion plate.

[0012] A further improvement of the present invention is that the diversion component includes an annular pipe and several nozzles, the annular array of the nozzles is fixedly connected to the inner wall of the annular pipe, and all the nozzles are in an upward inclined state.

[0013] A further improvement of this utility model is that the outer wall of the annular pipe is fixedly connected to one end of the air inlet pipe, and the air inlet pipe, the annular pipe, the nozzle and the absorption tower are interconnected.

[0014] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0015] 1. This utility model provides a tail gas absorption tower for chemical production. It employs a combination of an absorption tower, an inlet pipe, and an impurity filter assembly. The impurity filter assembly is installed at the port of the inlet pipe and connected to the tail gas pipe via a flange. When the tail gas passes through the impurity filter assembly into the absorption tower, the filter screen in the assembly filters out impurity particles in the tail gas, preventing them from entering the absorption tower. Furthermore, by disassembling the impurity filter assembly, the filter screen can be periodically removed and cleaned. This solves the problem that when tail gas from chemical production enters the tail gas absorption tower, it contains a large amount of impurity particles. After the absorbent liquid comes into contact with the impurities in the tail gas, the impurities are trapped in the absorption tower, and when there are too many impurities in the absorption tower, it affects the normal operation of the device. This invention achieves the beneficial effect of effectively filtering impurity particles in the tail gas and ensuring the normal operation of the device.

[0016] 2. This utility model provides a tail gas absorption tower for chemical production. It employs a combination of an absorption tower, a diversion component, an inlet pipe, a reactant tank, a water pump, a liquid extraction pipe, and a spray component. The filtered tail gas enters the diversion component through the inlet pipe and is then sprayed out at an angle through multiple nozzles, changing the flow direction and velocity of the tail gas. The tail gas flows upwards and then passes through a dispersion plate in the absorption tower, further dispersing it. This allows the reactant in the absorption tower to be sprayed out in an atomized form through a delivery pipe, ensuring thorough and uniform mixing with the tail gas. This solves the problem that when the tail gas is simply introduced from the bottom of the absorption tower, it flows directly upwards along the inner cavity of the absorption tower, failing to fully contact the reactant and resulting in poor reaction efficiency. Therefore, this invention achieves the beneficial effect of improving the absorption efficiency of the tail gas. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the tail gas absorption tower for chemical production according to this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the impurity filtration component of this utility model.

[0019] Figure 3 This is a partially enlarged schematic diagram of the A-dimensional structure of this utility model;

[0020] Figure 4 This is a schematic cross-sectional view of the three-dimensional structure of the absorption tower of this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the diversion component of this utility model.

[0022] In the diagram: 1. Absorption tower; 101. Fixing frame; 102. Dispersion plate; 2. Viewing window; 3. Diversion assembly; 31. Annular pipe; 32. Spray nozzle; 4. Air inlet pipe; 5. Impurity filtration assembly; 51. Air inlet hopper; 52. Positioning ring; 520. Groove; 53. Flange pipe; 54. Annular frame; 541. Sealing ring; 55. Filter screen; 56. Screw; 57. Gasket; 58. Nut; 59. Insertion hole; 6. Air outlet pipe; 7. Liquid drain pipe; 8. Valve; 9. Fixing plate; 10. Reagent tank; 11. Water pump; 12. Liquid extraction pipe; 13. Spray assembly; 131. Delivery pipe; 132. Water collection box; 133. Atomizing nozzle. Detailed Implementation

[0023] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, the following describes this utility model in conjunction with specific embodiments:

[0024] like Figure 1 As shown, this utility model provides a tail gas absorption tower for chemical production, including an absorption tower 1. A plurality of viewing windows 2 are fixedly connected in an equidistant array at the front end of the absorption tower 1. A flow-diverting assembly 3 is provided on the lower side of the outer wall of the absorption tower 1, and the inner wall of the flow-diverting assembly 3 penetrates into the interior of the absorption tower 1. An inlet pipe 4 is provided on the left side outside the flow-diverting assembly 3, and an impurity filter assembly 5 is provided at the left end of the inlet pipe 4. An outlet pipe 6 is fixedly connected to the top inside the absorption tower 1. The front end of the absorption tower 1 is fixed near the bottom of the flow-diverting assembly 3. A drain pipe 7 is fixedly connected to the outer wall of the absorber tower 1. A valve 8 is installed on the outer wall of the absorber tower 1. A fixing plate 9 is fixedly connected to the right side of the outer wall of the absorber tower 1. A reaction tank 10 is fixedly connected to the top of the fixing plate 9. A water pump 11 is fixedly connected to the top of the reaction tank 10. A suction pipe 12 is fixedly connected to the input port of the water pump 11. The bottom of the outer wall of the suction pipe 12 extends into the interior of the reaction tank 10. A spray assembly 13 is installed at the output port of the water pump 11. The top of the outer wall of the spray assembly 13 extends into the interior of the absorber tower 1.

[0025] The system is equipped with an absorption tower 1, a diversion component 3, an air inlet pipe 4, an impurity filter component 5, a reactant tank 10, a water pump 11, a liquid extraction pipe 12, and a spray component 13. The coordinated operation of the air inlet pipe 4 and the impurity filter component 5 facilitates the filtration of impurity particles in the exhaust gas, ensuring the normal operation of the device. The diversion component 3 diverts the intake exhaust gas and sprays it out, improving the flowability of the exhaust gas. This allows the spray component 13 to spray the reactant in the reactant tank 10 in an atomized form, ensuring thorough and uniform mixing with the exhaust gas.

[0026] like Figure 2As shown, this utility model provides a technical solution for a tail gas absorption tower for chemical production: the impurity filtration assembly 5 includes two air inlet hoppers 51, two positioning rings 52, a flange pipe 53, an annular frame 54, a filter screen 55, several screws 56, several washers 57, and several nuts 58. The inner walls of the two positioning rings 52 are respectively fixedly connected to the outer walls of the opposite sides of the two air inlet hoppers 51. One end of the flange pipe 53 is fixedly connected to the port of the left air inlet hopper 51. The outer wall of the filter screen 55 is fixedly connected to the inner wall of the annular frame 54. One end of the several screws 56 is fixedly connected in an annular array to the left end of the right positioning ring 52. The annular frame 54 and the left... The surface of the positioning ring 52 has a series of insertion holes 59 that are adapted to the screw 56. The port of the right air intake hopper 51 is fixedly connected to one end of the air intake pipe 4. The inner wall of the ring washer 57 is sleeved with the outer wall of the screw 56. The inner wall of the nut 58 is threadedly connected with the outer wall of the screw 56. The screw 56 on the right air intake hopper 51 is inserted into the insertion holes 59 on the annular frame 54 and the left positioning ring 52 in sequence. The ring washer 57 is placed between the screw 56 and the nut 58. When the nut 58 is screwed and fixed on the screw 56, the stability of the filter screen 55 installed between the two air intake hoppers 51 is further increased. At the same time, it is convenient to disassemble and remove the filter screen 55 for cleaning.

[0027] like Figure 3 As shown, this utility model provides a technical solution for a tail gas absorption tower for chemical production: sealing rings 541 are fixedly connected to the inner sides of the left and right ends of the annular frame 54 near the insertion holes 59, and the inner sides of the two positioning rings 52 near the screw 56 are provided with grooves 520 that are compatible with the sealing rings 541. The annular frame 54 is tightly fitted into the grooves 520 by the sealing rings 541 on both sides, which ensures the sealing of the air inlet hopper 51 and prevents tail gas leakage.

[0028] like Figure 4 As shown, this utility model provides a technical solution for a tail gas absorption tower for chemical production: the spray assembly 13 includes a conveying pipe 131, a water collection box 132, and several atomizing nozzles 133. The middle side of the top of the water collection box 132 is fixedly connected to one end of the conveying pipe 131. The connecting ends of the several atomizing nozzles 133 are fixedly connected in a ring array to the bottom of the water collection box 132. The outer wall of the conveying pipe 131 penetrates into the interior of the absorption tower 1 and is fixedly connected to each other. The atomizing nozzles 133 spray out in an atomized form, which facilitates the reverse flow of tail gas. The agent and the exhaust gas are fully mixed. The outside of the water collection box 132 is set on the upper side inside the absorption tower 1. Two fixed frames 101 are fixedly connected to the inner wall of the absorption tower 1 near the flow distribution component 3 and the spray component 13 respectively. The inner walls of the two fixed frames 101 are fixedly connected to the dispersion plate 102. The mesh size of the holes in the upper dispersion plate 102 is larger than that in the lower dispersion plate 102. The dispersion plate 102 is set to disperse the exhaust gas, so that the exhaust gas flows in a dispersed manner in the absorption tower 1, forming a larger contact interface.

[0029] like Figure 5 As shown, this utility model provides a technical solution for a tail gas absorption tower for chemical production: the diversion component 3 includes an annular pipe 31 and several nozzles 32. The annular array of several nozzles 32 is fixedly connected to the inner wall of the annular pipe 31. All of the nozzles 32 are in an upward inclined state. The outer wall of the annular pipe 31 is fixedly connected to one end of the air inlet pipe 4. The filtered tail gas is then sprayed out at an angle from the multiple nozzles 32 through the annular pipe 31, changing the flow direction and velocity of the tail gas. The air inlet pipe 4, the annular pipe 31, the nozzles 32 and the absorption tower 1 are interconnected.

[0030] The working principle of this type of tail gas absorption tower for chemical production will be explained in detail below.

[0031] like Figure 1-5 As shown, firstly, the annular frame 54 and the left-side positioning ring 52 are inserted into the screw 56 through the insertion hole 59, and the washers 57 are sequentially placed on the screw 56. Finally, the nuts 58 are screwed onto the screw 56 in sequence. The annular frame 54 is then installed and fixed between the two air inlet hoppers 51. The sealing rings 541 at both ends of the annular frame 54 are tightly fitted into the grooves 520 on both sides to ensure the airtightness of the air inlet hopper 51. Then, the tail gas pipeline used in chemical production is connected to the flange pipeline 53 in the absorption tower 1 using bolts. When only the tail gas is absorbed, the tail gas enters the air inlet hopper 51 through the flange pipeline 53, allowing the filter screen 55 to filter the impurity particles in the tail gas, effectively preventing impurities from entering. The gas is introduced into the absorption tower 1, and the water pump 11 is started. The water pump 11 draws the liquid containing the tail gas reactant from the reactant tank 10 through the liquid extraction pipe 12. The reactant is transported to the water collection box 132 through the spray assembly 13, and then sprayed in an atomized form through multiple atomizing nozzles 133. The filtered tail gas is then sprayed out at an angle from multiple nozzles 32 through the annular pipe 31, changing the flow direction and velocity of the tail gas. The tail gas flows upward, and then passes through the dispersion plate 102 in the absorption tower 1 to disperse the tail gas, so that the tail gas flows dispersedly in the absorption tower 1, forming a larger contact interface, increasing the contact area between the tail gas and the reactant, so that the reactant is fully mixed with the tail gas, and further improving the absorption effect of the tail gas.

[0032] The specific types and structures of the water pumps and atomizing nozzles used are all existing products, as are the specific circuit connection structure and control relationship between the absorption tower and the water pump. These will not be elaborated upon here.

[0033] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A tail gas absorption tower for chemical production, comprising an absorption tower (1), characterized in that: The front end of the absorption tower (1) is fixedly connected with several viewing windows (2) in an equidistant array. A diversion assembly (3) is provided on the lower side of the outer wall of the absorption tower (1), and the inner wall of the diversion assembly (3) extends into the interior of the absorption tower (1). An air inlet pipe (4) is provided on the left side outside the diversion assembly (3), and an impurity filter assembly (5) is provided at the left end of the air inlet pipe (4). An air outlet pipe (6) is fixedly connected to the top inside the absorption tower (1). A drain pipe (7) is fixedly connected to the bottom of the front end of the absorption tower (1) near the diversion assembly (3). A valve (8) is provided on the outer wall. A fixing plate (9) is fixedly connected to the right side of the outer wall of the absorption tower (1). A reaction tank (10) is fixedly connected to the top of the fixing plate (9). A water pump (11) is fixedly connected to the top of the reaction tank (10). A liquid extraction pipe (12) is fixedly connected to the input port of the water pump (11). The bottom of the outer wall of the liquid extraction pipe (12) extends into the interior of the reaction tank (10). A spray assembly (13) is provided at the output port of the water pump (11). The top of the outer wall of the spray assembly (13) extends into the interior of the absorption tower (1).

2. The tail gas absorption tower for chemical production according to claim 1, characterized in that: The impurity filtration assembly (5) includes two air inlets (51), two positioning rings (52), a flange pipe (53), an annular frame (54), a filter screen (55), several screws (56), several washers (57), and several nuts (58). The inner walls of the two positioning rings (52) are respectively fixedly connected to the outer walls of the opposite sides of the two air inlets (51). One end of the flange pipe (53) is fixedly connected to the port of the left air inlet (51). The outer wall of the filter screen (55) is fixedly connected to the inner wall of the annular frame (54). One end of the several screws (56) is fixedly connected in an annular array to the left end of the right positioning ring (52). The annular frame (54) and the left positioning ring (52) have several insertion holes (59) that are adapted to the screws (56) in an annular array on their surfaces.

3. The tail gas absorption tower for chemical production according to claim 2, characterized in that: The port of the air intake hopper (51) on the right side is fixedly connected to one end of the air intake pipe (4), the inner wall of the ring gasket (57) is sleeved with the outer wall of the screw (56), and the inner wall of the nut (58) is threadedly connected with the outer wall of the screw (56).

4. The tail gas absorption tower for chemical production according to claim 2, characterized in that: The left and right ends of the ring frame (54) are respectively fixedly connected to the inner side of the insertion hole (59) and the two positioning rings (52) are respectively provided with grooves (520) that are compatible with the sealing rings (541) on the inner side of the screw (56).

5. The tail gas absorption tower for chemical production according to claim 1, characterized in that: The spray assembly (13) includes a delivery pipe (131), a water collection box (132), and several atomizing nozzles (133). The middle side of the top of the water collection box (132) is fixedly connected to one end of the delivery pipe (131). The connecting ends of several atomizing nozzles (133) are fixedly connected in a ring array to the bottom of the water collection box (132). The outer wall of the delivery pipe (131) penetrates into the interior of the absorption tower (1) and is fixedly connected to it. The exterior of the water collection box (132) is located on the upper side inside the absorption tower (1).

6. The tail gas absorption tower for chemical production according to claim 1, characterized in that: The inner wall of the absorption tower (1) is fixedly connected to two fixed frames (101) near the flow distribution component (3) and the spray component (13). The inner walls of the two fixed frames (101) are fixedly connected to a dispersion plate (102). The mesh size of the holes in the upper dispersion plate (102) is greater than that in the lower dispersion plate (102).

7. The tail gas absorption tower for chemical production according to claim 1, characterized in that: The diversion component (3) includes an annular pipe (31) and a plurality of nozzles (32). The annular array of the plurality of nozzles (32) is fixedly connected to the inner wall of the annular pipe (31), and the plurality of nozzles (32) are all in an upward inclined state.

8. A tail gas absorption tower for chemical production according to claim 7, characterized in that: The outer wall of the annular pipe (31) is fixedly connected to one end of the air inlet pipe (4), and the air inlet pipe (4), the annular pipe (31), the nozzle (32) and the absorption tower (1) are interconnected.

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