A waste heat recovery type waste gas purification tower for flake caustic soda production

Abstract

The utility model discloses a waste heat recovery type waste gas purification tower for flake alkali production relates to waste gas treatment equipment technical field, including waste gas purification tower body, the liquid inlet pipe of horizontal through -going setting is fixedly installed on waste gas purification tower body. In the application, when the multiple atomizing nozzles on a certain liquid outlet cylinder need to be maintained separately, the knob is rotated, the knob rotation drives the rotating stud to move in the screw hole, the rotating stud movement drives the liquid outlet cylinder to move, the liquid outlet cylinder movement drives the arc outer sealing plate to separate from the liquid distribution cylinder, and the liquid outlet cylinder movement drives the circular tube to separate from the arc inner sealing plate. Since the spring is in a compressed state, the arc inner sealing plate is tightly attached to the circular tube under the action of the spring. When the circular tube moves out of the circular hole, the arc inner sealing plate seals the circular hole at this time, preventing the waste gas purification liquid from leaking out through the circular hole, and not affecting the liquid injection of other liquid outlet cylinders and atomizing nozzles.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas treatment equipment, and in particular to a waste heat recovery type waste gas purification tower for caustic soda production. Background Technology

[0002] Sodium hydroxide flakes, also known as caustic soda, are an important basic chemical raw material widely used in papermaking, textiles, printing and dyeing, petrochemicals, and other fields. During the production of sodium hydroxide flakes, whether using the causticization method or the ion exchange membrane method, waste gases containing harmful substances such as chlorine, hydrogen chloride, and volatile alkaline mists are generated due to raw material reactions and high-temperature evaporation. Direct emission of these waste gases into the atmosphere not only causes serious pollution to the surrounding environment and harms the ecological balance, but also poses a threat to the health of operators. Therefore, efficient purification of the waste gases generated during sodium hydroxide flake production is an indispensable key link in the industry and a necessary measure to achieve green production and meet environmental regulations.

[0003] However, existing waste gas purification equipment for caustic soda production still has many shortcomings: on the one hand, most purification devices adopt an integrated design for their spray systems. When some atomizing nozzles or pipelines become blocked or damaged and require maintenance, the machine needs to be shut down for repair, affecting the continuity of the purification process and reducing production efficiency; on the other hand, the existing equipment has a simple sealing structure design. When maintaining a certain set of spray components individually, the purification liquid is prone to leakage, which leads to a decrease in the waste gas treatment effect and wastes absorbent. Therefore, we disclose a waste heat recovery type waste gas purification tower for caustic soda production to meet people's needs. Utility Model Content

[0004] The purpose of this application is to provide a waste heat recovery type exhaust gas purification tower for caustic soda production, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a waste heat recovery type waste gas purification tower for caustic soda production, including a waste gas purification tower body, a horizontally penetrating liquid inlet pipe fixedly installed on the waste gas purification tower body, one end of the liquid inlet pipe extending into the waste gas purification tower body and a liquid separator fixedly installed thereon, and a plurality of evenly arranged circular holes being opened on the inner side wall of the liquid separator. The liquid separator is equipped with multiple sealing structures, each of which corresponds to a number of circular holes. A circular tube is slidably installed inside each of the circular holes. One end of each of the circular tubes extends outside the circular hole and is fixedly installed with a liquid outlet tube. A connected atomizing nozzle is fixedly installed at the bottom of each of the liquid outlet tubes. The end of each of the liquid outlet tubes away from the liquid separator is connected to the exhaust gas purification tower body through an installation mechanism. The exhaust gas purification tower body is equipped with a connected air inlet pipe on its side, and a heat recovery pipe is wound around the exhaust gas purification tower body and the air inlet pipe.

[0006] Preferably, the sealing structure includes two limiting rods fixedly installed on the inner wall of the dispensing cylinder, an arc-shaped inner sealing plate slidably sleeved on the two limiting rods, a disc fixedly installed at one end of each limiting rod away from the inner wall of the dispensing cylinder, and a spring sleeved on each of the two limiting rods, with the two ends of the springs respectively fixedly installed on the sides of the arc-shaped inner sealing plate and the disc that are close to each other.

[0007] Preferably, the side of the arc-shaped inner sealing plate away from the disc is adapted to the inner wall of the liquid separator, and the end of the circular tube is in contact with the side of the arc-shaped inner sealing plate.

[0008] Preferably, the installation mechanism includes an arc-shaped fixing plate, a threaded hole on the side of the arc-shaped fixing plate, a rotating stud threaded in the threaded hole, one end of the rotating stud being rotatably connected to the end of the liquid outlet cylinder, a knob being fixedly installed at the other end of the rotating stud, four sliding rods being fixedly installed at the end of the liquid outlet cylinder, and the arc-shaped fixing plate being slidably sleeved on the four sliding rods.

[0009] Preferably, the arc-shaped fixing plate has two guide holes on its side, and two guide rods are fixedly installed on the outer side of the exhaust gas purification tower body. The two guide rods are slidably installed in the two guide holes respectively. The arc-shaped fixing plate has two mounting holes on its side, and two fixing studs are fixedly installed on the outer side of the exhaust gas purification tower body. One end of each fixing stud passes through the two mounting holes and is threaded with a nut.

[0010] Preferably, an arc-shaped outer sealing plate is fixedly sleeved on the circular tube, and the arc-shaped outer sealing plate abuts against the side of the liquid separator that is close to each other.

[0011] Preferably, the inner wall of the arc-shaped fixing plate is provided with multiple liquid inlet holes, and the multiple liquid inlet holes are located inside the liquid separator.

[0012] Preferably, a packing layer is installed inside the exhaust gas purification tower body, a connected exhaust pipe is installed on the top of the exhaust gas purification tower body, and multiple maintenance holes are opened on the inner side wall of the exhaust gas purification tower body, the maintenance holes corresponding to the positions of the arc-shaped fixing plate.

[0013] In summary, the technical effects and advantages of this utility model are as follows: In this application, when multiple atomizing nozzles on a certain liquid outlet cylinder need to be maintained individually, by rotating the knob, the rotating screw moves spirally within the threaded hole, which in turn moves the liquid outlet cylinder. The movement of the liquid outlet cylinder causes the arc-shaped outer sealing plate to separate from the liquid distribution cylinder. At the same time, the movement of the liquid outlet cylinder causes the round tube to separate from the arc-shaped inner sealing plate. Since the spring is in a compressed state, the arc-shaped inner sealing plate moves tightly against the round tube under the action of the spring. When the round tube moves out of the round hole, the arc-shaped inner sealing plate seals the round hole, preventing the waste gas purification liquid from leaking out through the round hole, without affecting the spraying of other liquid outlet cylinders and atomizing nozzles. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a first-view perspective perspective view of the exhaust gas purification tower body of this utility model after it has been cut open. Figure 2 This is a second-view perspective perspective view of the exhaust gas purification tower body of this utility model after it has been cut open. Figure 3 for Figure 1 Enlarged view of point A in the middle; Figure 4 An enlarged view showing the connection between the arc-shaped outer sealing plate, the liquid outlet cylinder, the round tube, the rotating stud, the knob, the arc-shaped fixing plate, the slide bar, and the atomizing nozzle; Figure 5 This is a perspective view of the present utility model; Figure 6 for Figure 5 Enlarged view of section B in the middle.

[0016] In the diagram: 1. Waste gas purification tower body; 2. Heat recovery pipe; 3. Inlet pipe; 4. Outlet pipe; 5. Maintenance hole; 6. Liquid inlet pipe; 7. Liquid separator; 8. Arc-shaped outer sealing plate; 9. Circular hole; 10. Circular pipe; 11. Liquid inlet hole; 12. Arc-shaped inner sealing plate; 13. Limiting rod; 14. Spring; 15. Disc; 16. Liquid outlet cylinder; 17. Rotating stud; 18. Knob; 19. Arc-shaped fixing plate; 20. Sliding rod; 21. Atomizing nozzle; 22. Threaded hole; 23. Packing layer. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1 - Figure 6 The embodiments provided by this utility model are as follows: A waste heat recovery type waste gas purification tower for caustic soda production includes a waste gas purification tower body 1. A horizontally penetrating liquid inlet pipe 6 is fixedly installed on the waste gas purification tower body 1. One end of the liquid inlet pipe 6 extends into the waste gas purification tower body 1 and is fixedly installed with a liquid separator 7. The liquid separator 7 is located in the middle of the waste gas purification tower body 1. The top end of the liquid inlet pipe 6 can be connected to a liquid pump through a hose. The liquid pump can draw the waste gas purification liquid into the liquid inlet pipe 6. A plurality of evenly arranged round holes 9 are opened on the inner side wall of the liquid separator 7. The separatory cylinder 7 is equipped with multiple sealing structures, and the positions of the multiple sealing structures correspond to the positions of multiple circular holes 9. like Figure 3 As shown, the sealing structure includes two limiting rods 13 fixedly installed on the inner wall of the dispensing cylinder 7. An arc-shaped inner sealing plate 12 is slidably sleeved on each of the two limiting rods 13. A disc 15 is fixedly installed at one end of each limiting rod 13 away from the inner wall of the dispensing cylinder 7. A spring 14 is sleeved on each of the two limiting rods 13, with both ends of the spring 14 fixedly installed on the sides of the arc-shaped inner sealing plate 12 and the disc 15 that are close to each other. When the dispensing cylinder 16 moves, it causes the circular tube 10 to separate from the arc-shaped inner sealing plate 12. Because the spring 14 is in a compressed state, the arc-shaped inner sealing plate 12 moves tightly against the circular tube 10 under the action of the spring 14. When the circular tube 10 moves out of the circular hole 9, the arc-shaped inner sealing plate 12 seals the circular hole 9, preventing the waste gas purification liquid from leaking out through the circular hole 9, and not affecting the spraying of other dispensing cylinders 16 and atomizing nozzles 21.

[0019] Multiple circular tubes 10 are slidably installed inside multiple circular holes 9. One end of each circular tube 10 extends outside the circular hole 9 and is fixedly installed with a liquid outlet cylinder 16. Atomizing nozzles 21 are fixedly installed at the bottom of each liquid outlet cylinder 16. All atomizing nozzles 21 are arranged in an umbrella shape above the packing layer 23 to facilitate contact between the waste gas purification liquid and the waste gas. The end of each liquid outlet cylinder 16 away from the liquid separator 7 is connected to the waste gas purification tower body 1 through an installation mechanism. like Figure 3 and Figure 4As shown, the mounting mechanism includes an arc-shaped fixing plate 19. A threaded hole 22 is provided on the side of the arc-shaped fixing plate 19. A rotating stud 17 is threadedly installed inside the threaded hole 22. One end of the rotating stud 17 is rotatably connected to the end of the liquid outlet cylinder 16, and a knob 18 is fixedly installed at the other end of the rotating stud 17. Four sliding rods 20 are fixedly installed at the end of the liquid outlet cylinder 16, and the arc-shaped fixing plate 19 is slidably sleeved on the four sliding rods 20. When multiple atomizing nozzles 21 on a certain liquid outlet cylinder 16 need individual maintenance, the knob 18 is rotated. The rotation of the knob 18 causes the rotating stud 17 to move spirally within the threaded hole 22, and the movement of the rotating stud 17 causes the liquid outlet cylinder 16 to move.

[0020] An inlet pipe 3 is installed on the side of the exhaust gas purification tower body 1, and a heat recovery pipe 2 is wound around the exhaust gas purification tower body 1 and the inlet pipe 3. In actual use, a cold water pump can be installed at one end of the heat recovery pipe 2. The cold water pump draws cold water into the heat recovery pipe 2, and the cold water directly contacts the outer wall of the exhaust gas purification tower body 1 and the inlet pipe 3. Under the action of the high-heat exhaust gas, heat is transferred between the cold water and the exhaust water. Finally, the cold water is discharged as hot water, thus completing the recovery and utilization of heat.

[0021] During use, high-temperature exhaust gas can be discharged through the air inlet pipe 3, and water can enter through the heat recovery pipe 2. The high-temperature exhaust gas can heat the water on the heat recovery pipe 2, thereby recovering the waste heat of the high-temperature exhaust gas. The exhaust gas purification liquid can be discharged through the liquid inlet pipe 6. After passing through the liquid separator 7, the exhaust gas purification liquid enters multiple round pipes 10 and multiple liquid outlet pipes 16, and is sprayed out through multiple atomizing nozzles 21. After passing through the packing layer 23, the high-temperature exhaust gas and the exhaust gas purification liquid sprayed from the multiple atomizing nozzles 21 absorb and neutralize the harmful substances in the exhaust gas, and then it is discharged through the air outlet pipe 4.

[0022] like Figure 3 As shown, the side of the arc-shaped inner sealing plate 12 away from the disc 15 is adapted to the inner wall of the dispensing cylinder 7, and the end of the circular tube 10 contacts the side of the arc-shaped inner sealing plate 12. The advantage of this arrangement is that when the arc-shaped inner sealing plate 12 contacts the inner wall of the dispensing cylinder 7, the circular hole 9 can be sealed, and the spring 14 is still in a compressed state.

[0023] like Figure 5 and Figure 6As shown, the arc-shaped fixing plate 19 has two guide holes on its side. Two guide rods are fixedly installed on the outer side of the exhaust gas purification tower body 1, and the two guide rods are slidably installed in the two guide holes. The arc-shaped fixing plate 19 has two mounting holes on its side, and two fixing studs are fixedly installed on the outer side of the exhaust gas purification tower body 1. One end of each fixing stud passes through the two mounting holes and is threaded with a nut. The guide rods facilitate the guidance of the arc-shaped fixing plate 19, thus facilitating the insertion of the round tube 10 into the round hole 9. The nuts facilitate the fixing of the arc-shaped fixing plate 19 onto the outer side of the exhaust gas purification tower body 1, thereby sealing the maintenance hole 5.

[0024] like Figure 3 and Figure 4 As shown, an arc-shaped outer sealing plate 8 is fixedly sleeved on the circular tube 10, and the arc-shaped outer sealing plate 8 abuts against the side of the liquid separator 7. The arc-shaped outer sealing plate 8 can seal the circular hole 9 to prevent the waste gas purification liquid from leaking out.

[0025] like Figure 3 As shown, multiple liquid inlet holes 11 are provided on the inner wall of the arc-shaped fixing plate 19, and these multiple liquid inlet holes 11 are located inside the liquid separator 7. The advantage of this arrangement is that it facilitates the entry of the waste gas purification liquid into the liquid outlet cylinder 16.

[0026] like Figure 1 As shown, a packing layer 23 is installed inside the exhaust gas purification tower body 1. A connected exhaust pipe 4 is installed on the top of the exhaust gas purification tower body 1. Multiple maintenance holes 5 are opened on the inner side wall of the exhaust gas purification tower body 1, and the maintenance holes 5 correspond to the positions of the arc-shaped fixing plate 19. After passing through the packing layer 23, the high-temperature exhaust gas is mixed with the exhaust gas purification liquid sprayed from multiple atomizing nozzles 21 to absorb and neutralize the harmful substances in the exhaust gas, and then discharged through the exhaust pipe 4.

[0027] Working principle: During use, high-temperature exhaust gas can be discharged through the air inlet pipe 3, and water can enter through the heat recovery pipe 2. The high-temperature exhaust gas can heat the water on the heat recovery pipe 2, thereby recovering the waste heat of the high-temperature exhaust gas. The exhaust gas purification liquid can be discharged through the liquid inlet pipe 6. After passing through the liquid separator 7, the exhaust gas purification liquid enters multiple round pipes 10 and multiple liquid outlet pipes 16, and is sprayed out through multiple atomizing nozzles 21. After passing through the packing layer 23, the high-temperature exhaust gas and the exhaust gas purification liquid sprayed from the multiple atomizing nozzles 21 absorb and neutralize the harmful substances in the exhaust gas, and then it is discharged through the air outlet pipe 4. When multiple atomizing nozzles 21 on a certain liquid outlet cylinder 16 need to be maintained individually, by turning the knob 18, the rotation of the knob 18 causes the rotating stud 17 to move spirally within the threaded hole 22. The movement of the rotating stud 17 causes the liquid outlet cylinder 16 to move, which in turn causes the arc-shaped outer sealing plate 8 to separate from the liquid distribution cylinder 7. At the same time, the movement of the liquid outlet cylinder 16 causes the round tube 10 to separate from the arc-shaped inner sealing plate 12. Since the spring 14 is in a compressed state, the arc-shaped inner sealing plate 12 moves tightly against the round tube 10 under the action of the spring 14. When the round tube 10 moves out of the round hole 9, the arc-shaped inner sealing plate 12 seals the round hole 9, preventing the waste gas purification liquid from leaking out through the round hole 9. This does not affect the spraying of other liquid outlet cylinders 16 and atomizing nozzles 21. Then, by removing the two nuts, the arc-shaped fixing plate 19 can be taken out, thereby allowing the atomizing nozzle 21 to be removed for individual maintenance.

[0028] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waste heat recovery type exhaust gas purification tower for caustic soda production, characterized in that: The system includes a waste gas purification tower body (1), on which a horizontally penetrating liquid inlet pipe (6) is fixedly installed. One end of the liquid inlet pipe (6) extends into the waste gas purification tower body (1) and a liquid separator (7) is fixedly installed. Multiple evenly arranged round holes (9) are opened on the inner side wall of the liquid separator (7). Multiple sealing structures are installed inside the liquid separator (7). The multiple sealing structures correspond to the positions of multiple circular holes (9). A circular tube (10) is slidably installed inside each of the multiple circular holes (9). One end of each of the multiple circular tubes (10) extends outside the circular hole (9) and is fixedly installed with a liquid outlet tube (16). A connected atomizing nozzle (21) is fixedly installed at the bottom of each of the multiple liquid outlet tubes (16). The end of each of the multiple liquid outlet tubes (16) away from the liquid separator (7) is connected to the exhaust gas purification tower body (1) through an installation mechanism. The exhaust gas purification tower body (1) is equipped with a connected air inlet pipe (3) on its side, and a heat recovery pipe (2) is wound around the exhaust gas purification tower body (1) and the air inlet pipe (3).

2. The waste heat recovery type exhaust gas purification tower for caustic soda production according to claim 1, characterized in that: The sealing structure includes two limiting rods (13) fixedly installed on the inner wall of the dispensing cylinder (7). An arc-shaped inner sealing plate (12) is slidably sleeved on the two limiting rods (13). A disc (15) is fixedly installed on one end of each limiting rod (13) away from the inner wall of the dispensing cylinder (7). A spring (14) is sleeved on each of the two limiting rods (13). The two ends of the spring (14) are respectively fixedly installed on the sides of the arc-shaped inner sealing plate (12) and the disc (15) that are close to each other.

3. The waste heat recovery type exhaust gas purification tower for caustic soda production according to claim 2, characterized in that: The side of the arc-shaped inner sealing plate (12) away from the disc (15) is adapted to the inner wall of the liquid separator (7), and the end of the round tube (10) is in contact with the side of the arc-shaped inner sealing plate (12).

4. The waste heat recovery type exhaust gas purification tower for caustic soda production according to claim 1, characterized in that: The installation mechanism includes an arc-shaped fixing plate (19), with a threaded hole (22) on the side of the arc-shaped fixing plate (19). A rotating stud (17) is threaded into the threaded hole (22). One end of the rotating stud (17) is rotatably connected to the end of the liquid outlet cylinder (16). A knob (18) is fixedly installed at the other end of the rotating stud (17). Four sliding rods (20) are fixedly installed at the end of the liquid outlet cylinder (16). The arc-shaped fixing plate (19) is slidably sleeved on the four sliding rods (20).

5. A waste heat recovery type exhaust gas purification tower for caustic soda production according to claim 4, characterized in that: The arc-shaped fixing plate (19) has two guide holes on its side. The outer side of the exhaust gas purification tower body (1) has two guide rods fixedly installed. The two guide rods are slidably installed in the two guide holes. The arc-shaped fixing plate (19) has two mounting holes on its side. The outer side of the exhaust gas purification tower body (1) has two fixing studs fixedly installed. One end of each of the two fixing studs passes through the two mounting holes and is threaded with a nut.

6. The waste heat recovery type exhaust gas purification tower for caustic soda production according to claim 1, characterized in that: An arc-shaped outer sealing plate (8) is fixedly sleeved on the round tube (10), and the arc-shaped outer sealing plate (8) abuts against the side of the liquid separator (7).

7. The waste heat recovery type exhaust gas purification tower for caustic soda production according to claim 1, characterized in that: Multiple liquid inlet holes (11) are provided on the inner side wall of the arc-shaped fixing plate (19), and the multiple liquid inlet holes (11) are located inside the liquid separator (7).

8. A waste heat recovery type exhaust gas purification tower for caustic soda production according to claim 4, characterized in that: The exhaust gas purification tower body (1) is equipped with a packing layer (23), and the exhaust gas purification tower body (1) is equipped with a connected exhaust pipe (4) at the top. Multiple maintenance holes (5) are opened on the inner side wall of the exhaust gas purification tower body (1), and the maintenance holes (5) correspond to the positions of the arc-shaped fixing plate (19).

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