Petrochemical waste gas efficient catalytic combustion treatment device

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to a petrochemical waste gas efficient catalytic combustion treatment device which comprises a catalytic combustion furnace and a preheating cylinder which are fixedly connected through a connecting plate, and further comprises a sodium hydroxide solution box located below the preheating cylinder, air-blowing seats are fixedly connected to the front end and the rear end of the right side of the sodium hydroxide solution box, sealing plugs are slidably connected to the inner sides of the air-blowing seats, connecting rods are fixedly connected to one sides of the sealing plugs, and movable frames are fixedly connected to the sides, away from the sealing plugs, of the connecting rods. The petrochemical waste gas catalytic combustion treatment device has the advantages of high treatment efficiency and good treatment effect under the action of the gas guide pipe, the spiral heat exchange sheet, the gas equalizing ring and the driving motor; the situation that part of waste gas entering the inner side of the catalytic combustion furnace is not fully combusted with flames often exists, and then the petrochemical waste gas treatment efficiency is affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas treatment technical field, concretely is a kind of petroleum chemical industry waste gas efficient catalytic combustion treatment device. BACKGROUND

[0002] Petroleum chemical industry waste gas refers to various waste gases generated in the process of petroleum chemical production, mainly including hydrocarbon, alcohol, aldehyde, acid, ketone and amine and other organic waste gas, also accompanied by a large amount of PM2.5 and SO2.These waste gases not only pollute the atmospheric environment, but also harm human health.

[0003] At present, there are various ways to treat petroleum chemical industry waste gas, and catalytic combustion method is one of the commonly used ways, but the existing petroleum chemical industry waste gas catalytic combustion treatment device often has the condition that part of waste gas entering the inside of catalytic combustion furnace is not fully combusted with flame during use, thereby affecting the treatment efficiency of petroleum chemical industry waste gas, therefore, we propose a kind of petroleum chemical industry waste gas efficient catalytic combustion treatment device. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of petroleum chemical industry waste gas efficient catalytic combustion treatment device, with the advantages of efficient treatment and good treatment effect, solve the existing petroleum chemical industry waste gas catalytic combustion treatment device often has the condition that part of waste gas entering the inside of catalytic combustion furnace is not fully combusted with flame during use, thereby affecting the treatment efficiency of petroleum chemical industry waste gas problem.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of petroleum chemical industry waste gas efficient catalytic combustion treatment device, including catalytic combustion furnace and preheating cylinder fixedly connected by connecting plate, still include:

[0006] Sodium hydroxide solution tank is located below preheating cylinder, the front and rear ends of sodium hydroxide solution tank right side are all fixedly connected with air seat, the inside of air seat is slidably connected with sealing plug, the side of sealing plug is fixedly connected with connecting rod, the side, far from sealing plug of connecting rod, is fixedly connected with movable frame, the middle end of sodium hydroxide solution tank right side is fixedly installed with drive motor, the output of drive motor is fixedly connected with fixed plate, the lower end of fixed plate right side is fixedly connected with guide pin rod sliding in the inside of movable frame, the upper end of air seat side is fixedly installed with detector;

[0007] Support pipe is fixedly connected in the middle end of preheating cylinder inner chamber, and the left and right two ends are all hollow structure, the right side of preheating cylinder inner chamber is fixedly connected with air equalizing ring, the top between air equalizing ring and catalytic combustion furnace is communicated with gas conveying pipe, the right end of support pipe and the bottom of catalytic combustion furnace are communicated with gas feeding pipe;

[0008] A gas guide pipe communicated with the left end of the supporting pipe, and a communication pipe with a first one-way valve arranged at one end communicated between the lower end of the gas guide pipe and the top of the sodium hydroxide solution tank.

[0009] Preferably, the outer surface of the supporting pipe is fixedly connected with helical heat exchange fins communicated with the hollow structures at the left and right ends of the supporting pipe, and one side of the helical heat exchange fins is fixedly connected with helical fins.

[0010] Preferably, the lower end of one side of the air guide base is communicated with an air exhaust branch pipe with a second one-way valve arranged at one end, one end of the air exhaust branch pipe is provided with a backflow branch pipe extending to the lower end of the inner cavity of the sodium hydroxide solution tank, and the backflow branch pipe and the right end of the air exhaust branch pipe are respectively provided with a first valve body and a second valve body.

[0011] Preferably, a flow guide pipe with a third one-way valve arranged at the lower end is communicated between the middle end of one side of the sodium hydroxide solution tank and the lower end of the left side of the preheating cylinder.

[0012] Preferably, the other end of the gas guide pipe is communicated with a pre-filtering tank, and the inner cavity of the pre-filtering tank is provided with, from the lower end to the upper end and one side, a vortex gas equalizing pipe, a helical heat exchange pipe, a gas-liquid separation net, a defatted cotton filter screen and an activated carbon filter screen.

[0013] Preferably, the left end of the top of the vortex gas equalizing pipe is communicated with an air inlet pipe, and the bottom of the vortex gas equalizing pipe is provided with a plurality of air injection nozzles.

[0014] Preferably, the upper end of the helical heat exchange pipe is communicated with an air exhaust pipe extending to the rear of the pre-filtering tank, the lower end of the helical heat exchange pipe is communicated with an air inlet pipe with a fourth one-way valve arranged at one end, and the air inlet pipe is communicated with the air exhaust branch pipe.

[0015] Compared with the prior art, the utility model has the beneficial effects as follows:

[0016] 1. The utility model discloses a gas guide pipe can be sent into the left end of the supporting pipe in the preheating cylinder after the pretreatment of the gas, then, the gas enters the helical heat exchange fin through the hollow end of the left end of the supporting pipe, then, the gas can be introduced into the catalytic combustion furnace through the hollow end of the right end of the supporting pipe and the gas inlet pipe after the preheating of the gas, and the gas can be evenly dispersed into the preheating cylinder through the gas equalizing ring, and then flows to the left end of the inner cavity of the preheating cylinder along the helical heat exchange fin, and under the assistance of the helical fin, the gas flowing in the helical heat exchange fin can be stably and fully preheated, which is beneficial to the full combustion of the gas in the catalytic combustion furnace.

[0017] 2. In this invention, the rotating motor drives the fixed plate to rotate, which in turn forces the guide pin to slide inside the movable frame. This allows the movable frame to extend and retract within the blower seat via the connecting rod, driving the sealing plug to move in and outward. When the connecting rod drives the sealing plug to draw in air from the corresponding blower seat, its corresponding guide pipe can draw in the combustion gas flowing to the left end of the preheating cylinder cavity. After the gas enters the corresponding blower seat through the third one-way valve, its corresponding detector will quickly detect the gas. When the detected data meets the emission standards, the second valve at one end of the corresponding exhaust branch pipe will open. When the gas is vented inward, the gas in the corresponding blower seat can be discharged outward through the exhaust branch pipe. If the data detected by the detector does not meet the emission standards, the first valve body at one end of the return branch pipe will automatically open. Then, when the connecting rod drives the sealing plug to vent inward through the corresponding blower seat, the gas can enter the sodium hydroxide solution tank through the return branch pipe. The gas can then come into contact with the sodium hydroxide solution in the sodium hydroxide solution tank, thereby removing carbon dioxide from the gas. Then, the gas with carbon dioxide removed can enter the gas guide pipe again through the connecting pipe and the first one-way valve, and burn again after preheating, thereby improving the processing efficiency and processing quality of this device. Attached Figure Description

[0018] Figure 1 This is a first-view structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention from a second perspective;

[0020] Figure 3 This is a schematic diagram of the mating structure of the spiral heat exchange plate and the spiral heat exchange tube of this utility model;

[0021] Figure 4 This utility model Figure 3 Another perspective structural diagram;

[0022] Figure 5 This is a schematic diagram of the cooperative structure of the drive motor and the support tube of this utility model.

[0023] In the diagram: 1. Pre-filter box; 101. Inlet pipe; 102. Exhaust pipe; 103. Air guide pipe; 104. Gas-liquid separator; 105. Degreased cotton filter; 106. Activated carbon filter; 107. Vortex-shaped air distribution pipe; 108. Spiral heat exchanger tube; 109. Vent pipe; 110. Connecting pipe; 2. Preheating cylinder; 201. Exhaust branch pipe; 202. Return branch pipe; 203. Support pipe; 204. 1. Spiral heat exchange fins; 205. Gas distribution ring; 206. Flow guide pipe; 207. Spiral fins; 3. Catalytic combustion furnace; 301. Gas transmission pipe; 302. Gas supply pipe; 4. Sodium hydroxide solution tank; 401. Gas blasting seat; 402. Movable frame; 403. Sealing plug; 404. Connecting rod; 405. Guide pin; 406. Fixing plate; 407. Drive motor; 408. Detector; 5. Connecting plate. Detailed Implementation

[0024] 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.

[0025] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The components of this application include a pre-filter box 1, an inlet pipe 101, an exhaust pipe 102, a guide pipe 103, a gas-liquid separation mesh 104, a degreased cotton filter 105, an activated carbon filter 106, a vortex-shaped gas equalization pipe 107, a spiral heat exchanger tube 108, a ventilation pipe 109, a connecting pipe 110, a preheating cylinder 2, an exhaust branch pipe 201, a return branch pipe 202, a support pipe 203, spiral heat exchange fins 204, a gas equalization ring 205, a guide pipe 206, and spiral fins 207. The components of the catalytic combustion furnace 3, gas transmission pipe 301, gas supply pipe 302, sodium hydroxide solution tank 4, gas blasting seat 401, movable frame 402, sealing plug 403, connecting rod 404, guide pin 405, fixing plate 406, drive motor 407, detector 408, and connecting plate 5 are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0028] Example 1

[0029] Please see Figures 1-5 As shown, this utility model provides a technical solution: a high-efficiency catalytic combustion treatment device for petrochemical waste gas, including a catalytic combustion furnace 3 and a preheating cylinder 2 fixedly connected by a connecting plate 5, and further including:

[0030] The sodium hydroxide solution tank 4 is located below the preheating cylinder 2. Both the front and rear ends of the right side of the sodium hydroxide solution tank 4 are fixedly connected to the air blasting seat 401. The inner side of the air blasting seat 401 is slidably connected to the sealing plug 403. The side of the sealing plug 403 is fixedly connected to the connecting rod 404. The side of the connecting rod 404 away from the sealing plug 403 is fixedly connected to the movable frame 402. The middle of the right side of the sodium hydroxide solution tank 4 is fixedly installed with the drive motor 407. The output end of the drive motor 407 is fixedly connected to the fixed plate 406. The lower right end of the fixed plate 406 is fixedly connected to the guide pin 405 that slides inside the movable frame 402. The upper side of the air blasting seat 401 is fixedly installed with the detector 408.

[0031] A support pipe 203 is fixedly connected to the middle of the inner cavity of the preheating cylinder 2 and has a hollow structure at both ends. A gas equalization ring 205 is fixedly connected to the right side of the inner cavity of the preheating cylinder 2. A gas supply pipe 301 is connected between the gas equalization ring 205 and the top of the catalytic combustion furnace 3. A gas supply pipe 302 is connected between the right end of the support pipe 203 and the bottom of the catalytic combustion furnace 3.

[0032] A gas guide pipe 103 is connected to the left end of the support pipe 203. A connecting pipe 110 with a first one-way valve at one end is connected between the lower end of the gas guide pipe 103 and the top of the sodium hydroxide solution tank 4.

[0033] The lower end of one side of the blasting seat 401 is connected to an exhaust branch pipe 201 with a second one-way valve at one end. One end of the exhaust branch pipe 201 is connected to a return branch pipe 202 extending to the lower end of the inner cavity of the sodium hydroxide solution tank 4. The right ends of the return branch pipe 202 and the exhaust branch pipe 201 are respectively provided with a first valve body and a second valve body. The middle end of one side of the sodium hydroxide solution tank 4 is connected to the lower end of the left side of the preheating cylinder 2 by a guide pipe 206 with a third one-way valve at the lower end. The outer surface of the support pipe 203 is fixedly connected to a spiral heat exchange plate 204 that communicates with the hollow structure at its left and right ends. One side of the spiral heat exchange plate 204 is fixedly connected to a spiral fin 207.

[0034] This technical solution: Through the gas guide pipe 103, pretreated gas can be introduced into the left end of the support pipe 203 inside the preheating cylinder 2. Then, the gas enters the spiral heat exchange plate 204 through the hollow end of the left end of the support pipe 203. Next, the preheated gas can be introduced into the catalytic combustion furnace 3 for catalytic combustion through the hollow end of the right end of the support pipe 203 and the gas delivery pipe 302. The catalytic combustion gas can enter the gas equalization ring 205 through the gas delivery pipe 301, and then be evenly distributed into the preheating cylinder 2, flowing along the spiral heat exchange plate 204 towards the left end of the inner cavity of the preheating cylinder 2. Furthermore, with the assistance of the spiral fins 207, the gas flowing inside the spiral heat exchanger 204 can be stably and fully preheated, which is beneficial for the gas to be fully combusted in the catalytic combustion furnace 3. When the drive motor 407 rotates, it will drive the fixed plate 406 to rotate. The rotating fixed plate 406 will force the guide pin 405 to slide on the inner side of the movable frame 402, so that the movable frame 402 can drive the sealing plug 403 to extend and retract within the air blasting seat 401 via the connecting rod 404. When the connecting rod 404 drives the sealing plug 403 to move outward within the corresponding air blasting seat 401 to draw in air, The corresponding guide pipe 206 can draw in the combustion gas flowing to the left end of the preheating cylinder 2. After the gas enters the corresponding blower seat 401 through the third one-way valve, the corresponding detector 408 will quickly detect the gas. When the detected data meets the emission standards, the second valve body at one end of the corresponding exhaust branch pipe 201 will open. When the connecting rod 404 drives the sealing plug 403 to move inward in the corresponding blower seat 401 to exhaust gas, the gas in the corresponding blower seat 401 can be discharged outward through the exhaust branch pipe 201. If the data detected by the detector 408 does not meet the emission standards, The first valve at one end of the return branch pipe 202 will automatically open. Then, when the connecting rod 404 drives the sealing plug 403 to move inward to exhaust gas from the corresponding blower seat 401, the gas can enter the sodium hydroxide solution tank 4 through the return branch pipe 202. The gas can then come into contact with the sodium hydroxide solution in the sodium hydroxide solution tank 4, thereby removing carbon dioxide from the gas. Then, the gas with carbon dioxide removed can enter the gas guide pipe 103 again through the connecting pipe 110 and the first one-way valve. After preheating, it will be burned again, thereby improving the processing efficiency and processing quality of this device.

[0035] Example 2

[0036] Based on Embodiment 1, this utility model is as follows: Figures 1-5 As shown, the other end of the air guide pipe 103 is connected to the pre-filter box 1. The inner cavity of the pre-filter box 1 is provided with a vortex equalization pipe 107, a spiral heat exchange pipe 108, a gas-liquid separation net 104, a degreased cotton filter 105 and an activated carbon filter 106 from bottom to top. The left end of the top of the vortex equalization pipe 107 is connected to the air inlet pipe 101, and the bottom of the vortex equalization pipe 107 is provided with multiple air nozzles. The upper end of the spiral heat exchange pipe 108 is connected to the exhaust pipe 102 extending to the rear of the pre-filter box 1, and the lower end of the spiral heat exchange pipe 108 is connected to the vent pipe 109 with a fourth one-way valve at one end, and the vent pipe 109 is connected to the exhaust branch pipe 201.

[0037] This technical solution involves using a pre-filter box 1. Pre-treatment liquid is injected into the lower end of the pre-filter box 1's inner cavity. When exhaust gas is introduced into the vortex-shaped gas equalization pipe 107 through the air inlet pipe 101, and with the assistance of the jet nozzle, the exhaust gas is evenly dispersed into the pre-treatment liquid, thus achieving the first filtration of the exhaust gas. Then, the filtered gas sequentially passes through the gas-liquid separation net 104, the degreased cotton filter 105, and the activated carbon filter 106, achieving multiple filtrations and achieving a good filtration effect. Finally, the filtered gas can be discharged through the air guide pipe... 103 is fed into the preheating cylinder 2, and the gas discharged through the exhaust branch pipe 201 can enter the spiral heat exchange tube 108 through the vent pipe 109 and the fourth one-way valve. Finally, it is discharged outward through the exhaust pipe 102, thereby realizing the recovery of waste heat of the discharged gas and further preheating of the treated waste gas. A waste heat recovery pipe is set in the pre-filter box 1, and after cold water is sent into the waste heat recovery pipe, the other end of the waste heat recovery pipe passes through the lower end of the inner cavity of the pre-filter box 1 and discharges hot water, thus realizing the recovery of waste heat (not shown in the figure).

[0038] It should be noted that the injection or discharge of pre-treatment liquid into the lower end of the pre-filtration tank 1 is achieved through a liquid injection pipe and a drain pipe, which is existing technology and therefore not shown in the figure.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A high-efficiency catalytic combustion treatment device for petrochemical waste gas, comprising a catalytic combustion furnace (3) and a preheating cylinder (2) fixedly connected by a connecting plate (5), characterized in that, Also includes: The sodium hydroxide solution tank (4) is located below the preheating cylinder (2). Both the front and rear ends of the right side of the sodium hydroxide solution tank (4) are fixedly connected to the air blasting seat (401). The inner side of the air blasting seat (401) is slidably connected to the sealing plug (403). A connecting rod (404) is fixedly connected to one side of the sealing plug (403). A movable frame (402) is fixedly connected to the side of the connecting rod (404) away from the sealing plug (403). A drive motor (407) is fixedly installed in the middle of the right side of the sodium hydroxide solution tank (4). A fixed plate (406) is fixedly connected to the output end of the drive motor (407). A guide pin (405) that slides inside the movable frame (402) is fixedly connected to the lower right side of the fixed plate (406). A detector (408) is fixedly installed on the upper side of one side of the air blasting seat (401). A support pipe (203) is fixedly connected to the middle of the inner cavity of the preheating cylinder (2) and has a hollow structure at both ends. A gas equalization ring (205) is fixedly connected to the right side of the inner cavity of the preheating cylinder (2). A gas supply pipe (301) is connected between the gas equalization ring (205) and the top of the catalytic combustion furnace (3). A gas supply pipe (302) is connected between the right end of the support pipe (203) and the bottom of the catalytic combustion furnace (3). A gas guide pipe (103) is connected to the left end of the support pipe (203), and a connecting pipe (110) with a first one-way valve at one end is connected between the lower end of the gas guide pipe (103) and the top of the sodium hydroxide solution tank (4).

2. The high-efficiency catalytic combustion treatment device for petrochemical waste gas according to claim 1, characterized in that: The outer surface of the support tube (203) is fixedly connected with a spiral heat exchange plate (204) communicating with the hollow structure at its left and right ends, and a spiral fin (207) is fixedly connected to one side of the spiral heat exchange plate (204).

3. The high-efficiency catalytic combustion treatment device for petrochemical waste gas according to claim 1, characterized in that: The lower end of one side of the blower seat (401) is connected to an exhaust branch pipe (201) with a second one-way valve at one end. One end of the exhaust branch pipe (201) is provided with a return branch pipe (202) extending to the lower end of the inner cavity of the sodium hydroxide solution tank (4). The right ends of the return branch pipe (202) and the exhaust branch pipe (201) are respectively provided with a first valve body and a second valve body.

4. The high-efficiency catalytic combustion treatment device for petrochemical waste gas according to claim 1, characterized in that: A guide pipe (206) with a third one-way valve at the lower end is connected between the middle end of one side of the sodium hydroxide solution tank (4) and the lower end of the left side of the preheating cylinder (2).

5. The high-efficiency catalytic combustion treatment device for petrochemical waste gas according to claim 1, characterized in that: The other end of the air guide pipe (103) is connected to a pre-filter box (1). The inner cavity of the pre-filter box (1) is provided with a vortex gas equalization pipe (107), a spiral heat exchange pipe (108), a gas-liquid separation net (104), a degreased cotton filter (105), and an activated carbon filter (106) from bottom to top.

6. The high-efficiency catalytic combustion treatment device for petrochemical waste gas according to claim 5, characterized in that: The top left end of the vortex-shaped air distribution pipe (107) is connected to the air inlet pipe (101), and the bottom of the vortex-shaped air distribution pipe (107) is provided with multiple air nozzles.

7. The high-efficiency catalytic combustion treatment device for petrochemical waste gas according to claim 6, characterized in that: The upper end of the spiral heat exchange tube (108) is connected to an exhaust pipe (102) extending to the rear of the pre-filter box (1), and the lower end of the spiral heat exchange tube (108) is connected to a vent pipe (109) with a fourth one-way valve at one end, and the vent pipe (109) is connected to the exhaust branch pipe (201).

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