A catalytic oxidation device for phosphorus oxychloride chlorinated waste gas

Abstract

The utility model relates to a kind of catalytic oxidation device of phosphorus oxychloride chlorinated waste gas, including cylindrical reaction vessel, bottom sealing plate is fixed with the bottom of reaction vessel, the reaction vessel inside the bottom sealing plate upside is inserted and fixed with baffle, baffle and bottom sealing plate are formed with refrigerant cavity, refrigerant inlet pipe is fixed with the outer wall of reaction vessel and is communicated with refrigerant cavity, the reaction vessel inside the bottom sealing plate upside is inserted and fixed with the inclined flow guide plate, flow guide plate and baffle are formed with inlet cavity, ozone inlet pipe is fixed with the outer wall of reaction vessel and is communicated with reaction vessel. The catalytic oxidation device is optimized to the inside of reactor, mainly the structure of air inlet part is designed to modify, can conveniently add and replace catalytic packing, while waste gas normal catalytic oxidation reaction can be realized.

Description

Technical Field

[0001] This utility model relates to the technical field of catalytic oxidation devices, and more specifically to a catalytic oxidation device for phosphorus oxychloride chlorinated waste gas. Background Technology

[0002] Catalytic oxidation technology is an effective means of treating chlorinated volatile organic compounds (CVOCs). At relatively low temperatures, CVOCs in waste gas are completely oxidized into CO2 / CO, H2O, Cl2, and HCl under the action of a catalyst. Chlorinated organic gas reactants are adsorbed onto the catalyst surface, lowering the activation energy of CVOCs and accelerating the reaction rate. Catalytic oxidation technology has significant advantages over other methods, including low operating temperature, low energy consumption, high efficiency, and no secondary pollution. However, the catalytic oxidation of CVOCs relies heavily on catalyst activity to improve the oxidation effect. Therefore, suitable catalyst packing is needed in the reactor. Conventional catalyst packing is a block structure, stacked together. Furthermore, the catalyst is easily poisoned by chlorine and deactivated during the catalytic oxidation reaction, requiring replacement of the catalyst packing. Some have proposed using ball-bead structure catalyst packing particles, but the feed plate at the bottom of the reactor is a perforated plate, where the catalyst packing particles can become trapped in the small holes, affecting gas intake and the replacement of the catalyst packing particles. Therefore, this structure needs optimization and improvement. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a catalytic oxidation device for phosphorus oxychloride chlorinated waste gas. The catalytic oxidation device optimizes and improves the internal structure of the reactor, facilitating the addition and replacement of catalytic packing, while enabling normal catalytic oxidation reaction of the waste gas.

[0004] A catalytic oxidation device for phosphorus oxychloride chlorinated waste gas includes a cylindrical reaction vessel, a bottom sealing plate fixedly inserted to the bottom of the reaction vessel, a partition plate fixedly inserted to the upper side of the bottom sealing plate inside the reaction vessel, a refrigerant cavity formed by the partition plate and the bottom sealing plate, a refrigerant inlet pipe connected to the refrigerant cavity fixedly connected to the outer wall of the reaction vessel, an inclined guide plate fixedly inserted to the upper side of the bottom sealing plate inside the reaction vessel, an air inlet cavity formed by the guide plate and the partition plate, and an ozone inlet pipe connected to the reaction vessel fixedly connected to the outer wall of the reaction vessel.

[0005] The reaction vessel is equipped with two sets of uniformly distributed annular heat exchange tubes. The lower end of the heat exchange tubes passes through the guide plate and is fixed to the partition plate, communicating with the partition plate. The upper end of the heat exchange tubes is fixed to the perforated plate, which is fixed to the upper part of the reaction vessel. A catalytic oxidation reaction chamber is formed between the perforated plate and the guide plate, and the catalytic oxidation reaction chamber is filled with spherical catalytic packing particles. A vertical exhaust gas inlet pipe is fixed to the middle of the bottom sealing plate, the partition plate, and the guide plate. The upper end of the exhaust gas inlet pipe is inserted into the catalytic oxidation reaction chamber and is formed with a conical central guide cap. Several exhaust gas outlet holes are formed on the exhaust gas inlet pipe on the upper side of the guide plate. Several annularly distributed vent pipes are inserted into the catalytic oxidation reaction chamber between the two sets of heat exchange tubes. The lower end of the vent pipe is fixed to the guide plate and communicates with the inlet chamber. The upper end of the vent pipe is formed with a conical side guide cap. Several vent holes are formed on the vent pipe on the upper side of the guide plate.

[0006] The lower part of the reaction vessel is formed with a discharge port that communicates with the catalytic oxidation reaction chamber. The lower side of the discharge port is located at the lower end of the guide plate and is flush with the upper end of the guide plate. The upper part of the reaction vessel is formed with a feed port that communicates with the catalytic oxidation reaction chamber. A feed pipe that communicates with the feed port and a discharge valve that covers the discharge port are respectively fixed to the outer wall of the reaction vessel.

[0007] Preferably, the feed inlet on the reaction vessel is a circular hole, and the feed inlet is close to the orifice plate;

[0008] The feed inlet consists of a vertical pipe and an inclined pipe. The lower end of the inclined pipe is connected to the reaction vessel, and the inner wall of the inclined pipe and the inner wall of the feed inlet are on the same cylindrical surface. A screw cap is screwed to the top of the vertical pipe.

[0009] Preferably, the discharge valve includes an inclined discharge trough with a cross-section in the shape of a "U". The upper end of the inclined discharge trough is fixed to the reaction vessel. The inner walls of the inclined discharge trough near the reaction vessel are formed with grooves. An arc-shaped valve plate is inserted into the grooves. The valve plate abuts against the outer wall of the reaction vessel and covers the discharge port. A limit bolt is screwed onto the valve plate. The end of the limit bolt is inserted into the discharge port.

[0010] Preferably, the diameter of the heat exchange tube is smaller than the diameter of the vent pipe, the diameter of the vent pipe is smaller than the diameter of the exhaust gas inlet pipe, and both the vent pipe and the exhaust gas inlet pipe are located at the bottom of the catalytic oxidation reaction chamber.

[0011] Preferably, the central axis of the exhaust gas inlet pipe coincides with the central axis of the reaction vessel, and the heat exchange pipe and the vent pipe are evenly distributed in a ring around the central axis of the exhaust gas inlet pipe.

[0012] Preferably, the refrigerant inlet pipe and the ozone inlet pipe are located on the same side of the reaction vessel, while the refrigerant inlet pipe and the discharge valve are distributed on both sides of the reaction vessel.

[0013] Preferably, a circular refrigerant outlet box is inserted and fixed at the upper end of the heat exchange tube, and a refrigerant outlet pipe connected to the refrigerant outlet box is inserted and fixed on the reaction vessel.

[0014] The beneficial effects of this utility model are as follows:

[0015] This catalytic oxidation device optimizes and improves the internal structure of the reactor, mainly by modifying the design of the air inlet section. This facilitates the addition and replacement of catalytic packing while enabling normal catalytic oxidation of waste gas. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a front view structural diagram of the present invention;

[0018] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure at point AA in the middle;

[0019] Figure 4 This is a side view of the cross-sectional structure of the present invention.

[0020] In the diagram: 1. Reaction vessel; 11. Inlet; 12. Outlet; 2. Bottom sealing plate; 3. Baffle plate; 4. Guide plate; 5. Heat exchange tube; 6. Vent pipe; 61. Side guide cap; 62. Vent hole; 7. Waste gas inlet pipe; 71. Central guide cap; 72. Waste gas outlet; 8. Discharge valve; 81. Inclined discharge trough; 82. Valve plate; 83. Limit bolt; 9. Inlet pipe; 10. Orifice plate; 20. Screw cap; 30. Refrigerant inlet pipe; 40. Ozone inlet pipe. Detailed Implementation

[0021] Example: See Figures 1 to 4 As shown, a catalytic oxidation device for phosphorus oxychloride chlorinated waste gas includes a cylindrical reaction vessel 1. A bottom sealing plate 2 is inserted and fixed to the bottom of the reaction vessel 1. A partition plate 3 is inserted and fixed inside the reaction vessel 1 on the upper side of the bottom sealing plate 2. The partition plate 3 and the bottom sealing plate 2 form a refrigerant cavity a. A refrigerant inlet pipe 30 connected to the refrigerant cavity a is fixed to the outer wall of the reaction vessel 1. An inclined guide plate 4 is inserted and fixed inside the reaction vessel 1 on the upper side of the bottom sealing plate 2. The guide plate 4 and the partition plate 3 form an air inlet cavity b. An ozone inlet pipe 40 connected to the outer wall of the reaction vessel 1 is fixed to the outer wall of the reaction vessel 1.

[0022] The reaction vessel 1 is equipped with two sets of uniformly distributed annular heat exchange tubes 5. The lower end of the heat exchange tube 5 passes through the guide plate 4 and is fixed to the partition plate 3, communicating with the partition plate 3. The upper end is fixed to the perforated plate 10, which is fixed to the upper part of the reaction vessel 1. A catalytic oxidation reaction chamber is formed between the perforated plate 10 and the guide plate 4, and the catalytic oxidation reaction chamber is filled with spherical catalytic packing particles. A vertical exhaust gas inlet pipe 7 is fixed to the middle of the bottom sealing plate 2, the partition plate 3, and the guide plate 4, allowing the exhaust gas to pass through. The upper end of the inlet pipe 7 is inserted into the catalytic oxidation reaction chamber and is formed with a conical central guide cap 71. Several exhaust gas outlet holes 72 are formed on the exhaust gas inlet pipe 7 on the upper side of the guide plate 4. Several annularly distributed vent pipes 6 are inserted into the catalytic oxidation reaction chamber between the two sets of heat exchange pipes 5. The lower end of the vent pipe 6 is inserted and fixed on the guide plate 4 and connected to the air inlet chamber b. The upper end of the vent pipe 6 is formed with a conical side guide cap 61. Several exhaust holes 62 are formed on the vent pipe 6 on the upper side of the guide plate 4.

[0023] The lower part of the reaction vessel 1 is formed with a discharge port 12 that communicates with the catalytic oxidation reaction chamber. The lower side of the discharge port 12 is located at the lower end of the guide plate 4 and is flush with the upper end surface of the guide plate 4. The upper part of the reaction vessel 1 is formed with a feed port 11 that communicates with the catalytic oxidation reaction chamber. The outer wall of the reaction vessel 1 is fixed with a feed pipe 9 that communicates with the feed port 11 and a discharge valve 8 that covers the discharge port 12.

[0024] The feed inlet 11 on the reaction vessel 1 is a round hole, and the feed inlet 11 is close to the orifice plate 10; thus, more catalytic packing particles can be injected into the catalytic oxidation reaction chamber through the feed inlet 11;

[0025] The feed pipe 9 consists of a vertical pipe and an inclined pipe. The lower end of the inclined pipe is connected to the reaction vessel 1. The inner wall of the inclined pipe and the inner wall of the feed port 11 are in the same cylindrical surface. The top end of the vertical pipe is screwed and fixed with a cap 20. The cap 20 is installed on the feed pipe 9 to prevent the gas after the reaction from flowing out of the feed pipe 9.

[0026] The discharge valve 8 includes an inclined discharge trough 81 with a cross-section in the shape of a "U". The upper end of the inclined discharge trough 81 is fixed to the reaction vessel 1. The inner walls of the inclined discharge trough 81 near the reaction vessel 1 are formed with grooves 811. An arc-shaped valve plate 82 is inserted into the grooves 811. The valve plate 82 abuts against the outer wall of the reaction vessel 1 and covers the discharge port 12. A limiting bolt 83 is screwed onto the valve plate 82. The end of the limiting bolt 83 is inserted into the discharge port 12. The above-mentioned discharge valve 8 structure facilitates the discharge of catalytic packing particles from the catalytic oxidation reaction chamber.

[0027] The diameter of the heat exchange tube 5 is smaller than that of the vent pipe 6, and the diameter of the vent pipe 6 is smaller than that of the exhaust gas inlet pipe 7. Both the vent pipe 6 and the exhaust gas inlet pipe 7 are located at the bottom of the catalytic oxidation reaction chamber.

[0028] The central axis of the exhaust gas inlet pipe 7 coincides with the central axis of the reaction vessel 1, and the heat exchange pipe 5 and the vent pipe 6 are evenly distributed in a ring around the central axis of the exhaust gas inlet pipe 7.

[0029] The refrigerant inlet pipe 30 and the ozone inlet pipe 40 are located on the same side of the reaction vessel 1, while the refrigerant inlet pipe 30 and the discharge valve 8 are distributed on both sides of the reaction vessel 1, thus minimizing interference issues after installation and connection.

[0030] The upper end of the heat exchange tube 5 is fixedly connected to a circular refrigerant output box, and the reaction vessel 1 is fixedly connected to a refrigerant outlet pipe that communicates with the refrigerant output box.

[0031] Working principle: This structure is a catalytic oxidation device for phosphorus oxychloride chlorinated waste gas. Its main technical point is that the bottom structure of the reaction vessel 1 uses a planar inclined guide plate 4 instead of an orifice plate. The waste gas and ozone enter through a vertical pipeline. The top of the pipeline is equipped with a conical guide cap (central guide cap 71 and guide cap 61), and the gas outlet is opened at the top of the pipeline, so that the catalytic packing particles will not block the gas outlet.

[0032] Furthermore, the feed pipe 9 allows for the convenient addition of catalytic packing particles into the reaction vessel 1 to achieve the appropriate quantity of catalytic packing particles, ensuring a highly efficient catalytic oxidation reaction. When replacing the catalytic packing particles, the discharge valve 8 is opened, and the catalytic packing particles can roll out of the reaction vessel 1 along the guide plate 4, making replacement convenient.

[0033] The embodiments described above are illustrative of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be as set forth in the claims.

Claims

1. A catalytic oxidation device for phosphorus oxychloride chlorinated waste gas, comprising a cylindrical reaction vessel (1), a bottom sealing plate (2) fixedly inserted into the bottom of the reaction vessel (1), a partition plate (3) fixedly inserted into the reaction vessel (1) on the upper side of the bottom sealing plate (2), a refrigerant cavity (a) formed by the partition plate (3) and the bottom sealing plate (2), and a refrigerant inlet pipe (30) connected to the refrigerant cavity (a) fixedly connected to the outer wall of the reaction vessel (1), characterized in that: An inclined deflector plate (4) is inserted and fixed inside the reaction vessel (1) above the bottom sealing plate (2). An air inlet chamber (b) is formed between the deflector plate (4) and the partition plate (3). An ozone inlet pipe (40) communicating with the reaction vessel (1) is fixedly connected to the outer wall of the reaction vessel (1). Two groups of annularly and uniformly distributed heat exchange tubes (5) are inserted into the reaction vessel (1). The lower ends of the heat exchange tubes (5) pass through the deflector plate (4), are inserted and fixed on the partition plate (3) and communicate with the partition plate (3), and the upper ends are inserted and fixed on the perforated plate (10). The perforated plate (10) is inserted and fixed in the upper part of the reaction vessel (1). A catalytic oxidation reaction chamber is formed between the perforated plate (10) and the deflector plate (4). Spherical catalytic packing particles are filled in the catalytic oxidation reaction chamber. A vertical waste gas inlet pipe (7) is inserted and fixed in the middle of the bottom sealing plate (2), the partition plate (3) and the deflector plate (4). The upper end of the waste gas inlet pipe (7) is inserted into the catalytic oxidation reaction chamber and a conical central deflector cap (71) is formed. A number of waste gas outlet holes (72) are formed on the waste gas inlet pipe (7) above the deflector plate (4). A number of annularly distributed air pipes (6) are inserted into the catalytic oxidation reaction chamber between the two groups of heat exchange tubes (5). The lower ends of the air pipes (6) are inserted and fixed on the deflector plate (4) and communicate with the air inlet chamber (b). The upper ends of the air pipes (6) are formed with conical side deflector caps (61). A number of air outlet holes (62) are formed on the air pipes (6) above the deflector plate (4). A discharge port (12) communicating with the catalytic oxidation reaction chamber is formed in the lower part of the reaction vessel (1). The lower side edge of the discharge port (12) is located at the low end of the deflector plate (4) and is flush with the upper end surface of the deflector plate (4). A feed port (11) communicating with the catalytic oxidation reaction chamber is formed in the upper part of the reaction vessel (1). A feed接管 (9) communicating with the feed port (11) and a discharge valve (8) covering the discharge port (12) are respectively fixedly connected to the outer wall of the reaction vessel (1).

2. The catalytic oxidation device for phosphorus oxychloride chlorinated waste gas according to claim 1, characterized in that: The feed port (11) on the reaction vessel (1) is a round hole, and the feed port (11) is close to the perforated plate (10). The feed接管 (9) is composed of a vertical pipe and an inclined pipe. The lower end of the inclined pipe is connected to the reaction vessel (1). The inner hole wall of the inclined pipe and the inner hole wall of the feed port (11) are in the same cylindrical surface. A rotary cover (20) is screwed and fixed at the top of the vertical pipe.

3. The catalytic oxidation device for phosphorus oxychloride chlorinated waste gas according to claim 1, characterized in that: The discharge valve (8) includes an inclined discharge chute (81) with a "凵” - shaped cross - section. The upper end of the inclined discharge chute (81) is fixedly connected to the reaction vessel (1). Card slots (811) are formed on the inner walls of the two sides of the inclined discharge chute (81) close to the reaction vessel (1). An arc - shaped valve plate (82) is inserted into the card slots (811). The valve plate (82) abuts against the outer wall of the reaction vessel (1) and covers the discharge port (12). A limit bolt (83) is screwed on the valve plate (82), and the end of the limit bolt (83) is inserted into the discharge port (12).

4. The catalytic oxidation device for phosphorus oxychloride chlorinated waste gas according to claim 1, characterized in that: The diameter of the heat exchange tube (5) is smaller than that of the vent pipe (6), and the diameter of the vent pipe (6) is smaller than that of the exhaust gas inlet pipe (7). Both the vent pipe (6) and the exhaust gas inlet pipe (7) are located at the bottom of the catalytic oxidation reaction chamber.

5. The catalytic oxidation device for phosphorus oxychloride chlorinated waste gas according to claim 4, characterized in that: The central axis of the exhaust gas inlet pipe (7) coincides with the central axis of the reaction vessel (1), and the heat exchange pipe (5) and the vent pipe (6) are evenly distributed in a ring around the central axis of the exhaust gas inlet pipe (7).

6. The catalytic oxidation device for phosphorus oxychloride chlorinated waste gas according to claim 1, characterized in that: The refrigerant inlet pipe (30) and ozone inlet pipe (40) are located on the same side of the reaction vessel (1), while the refrigerant inlet pipe (30) and discharge valve (8) are distributed on both sides of the reaction vessel (1).

7. The catalytic oxidation device for phosphorus oxychloride chlorinated waste gas according to claim 1, characterized in that: The upper end of the heat exchange tube (5) is fixed with a circular refrigerant output box, and the reaction vessel (1) is fixed with a refrigerant outlet pipe that is connected to the refrigerant output box.

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