Catalytic oxidation tower for VOC tail gas treatment

Abstract

The utility model discloses a catalytic oxidation tower for VOC (volatile organic compound) tail gas treatment, which relates to the technical field of tail gas treatment and comprises a support frame, the upper side of the support frame is fixedly connected with a plurality of vertically distributed standard knots, and the upper sides of the plurality of standard knots are movably sleeved with fixing mechanisms. A heating mechanism is fixedly connected to the middle of the inner side of each standard section, a sealing cover is placed on the upper side of the standard section on the uppermost side, an ozone distribution device is movably installed at the position, close to the bottom, of the inner side of each standard section, and a catalyst is fixedly connected to the position, close to the upper side, of the inner side of each standard section in a sleeving mode. According to the catalytic oxidation tower for treating the VOC tail gas, the VOC tail gas and ozone are fully mixed through the ozone distribution device, and the vortex plate is used for heating the mixed gas, increasing the reaction temperature and increasing the reaction efficiency, so that the VOC tail gas is catalytically oxidized at a higher speed and is quickly consumed, and the overall treatment stage number is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to a catalytic oxidation tower for VOC tail gas treatment. Background Art

[0002] The continuous growth of the global population has led to the rapid development of industry, breeding and planting. The atmospheric environment in densely populated areas has deteriorated rapidly. In order to improve the atmospheric environment, countries have introduced policies to limit the emission of organic gases such as VOCs and odorous gases such as malodors. In the environmental protection industry, the purification of organic gases containing VOCs is a large and important branch.

[0003] Chinese patent document CN212819149U discloses a catalytic oxidation tower for VOC tail gas treatment process, which relates to the technical field related to tail gas treatment, and includes a catalytic oxidation tower body, a tail gas inlet is provided in the middle of the bottom end of the catalytic oxidation tower body, and a tail gas outlet is provided in the middle of the top end of the catalytic oxidation tower body. By setting two or more layers of catalyst fixed bed, an ozone air distribution pipe is provided at the bottom of each layer, the air distribution pipe is a multi-turn spiral, and the ozone outlet is downward, opposite to the flow direction of the tail gas, so as to facilitate the mixing of ozone and tail gas. In addition to satisfying the rapid reaction of several components in ozone and tail gas on the surface, the catalyst fixed bed also has the function of promoting the full mixing of ozone and tail gas. The multi-stage ozone air distribution pipe is provided with a step-by-step supplementary ozone concentration to compensate for the effect of the reduction of ozone concentration caused by ozone decomposition, and at the same time, the reaction time of organic matter in tail gas and ozone is extended to meet the requirements of treatment effect.

[0004] The existing technology has the following problems:

[0005] The oxidation tower uses multi-stage ozone catalysis to treat VOC tail gas. Due to the problem of oxidation efficiency, the catalyst needs to be set up in multiple layers to remove harmful substances in the VOC tail gas as much as possible, which increases the height of the oxidation tower and makes it difficult to maintain and manage. Utility Model Content

[0006] The utility model provides a catalytic oxidation tower for treating VOC tail gas, so as to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A catalytic oxidation tower for treating VOC tail gas comprises a support frame, wherein a plurality of vertically distributed standard sections are fixedly connected to the upper side of the support frame, a fixing mechanism is movably sleeved on the upper sides of the plurality of the standard sections, a heating mechanism is fixedly connected to the inner middle parts of the plurality of the standard sections, a sealing cover is placed on the upper side of the uppermost standard section, an ozone distribution device is movably installed on the inner sides of the plurality of the standard sections near the bottom, and a catalyst is fixedly sleeved on the inner sides of the plurality of the standard sections near the upper sides.

[0009] Preferably, two adjacent standard sections are fixed together by screws, and the fixing mechanism includes an insert block, the upper side of the insert block is fixedly connected to the lower surface of the standard section except the lowermost one or the lower surface of the cover near the edge, a slot is provided on the upper side of the standard section, and the outer side of the insert block is movably sleeved on the inner side of the slot.

[0010] Preferably, a rubber pad is fixedly sleeved on the inner side of the slot near the bottom.

[0011] Preferably, the heating mechanism includes a vortex plate, the upper and lower sides of which are fixedly connected to the inner middle part of the standard section through a support frame, an air injection pipe is fixedly connected to the right side of the vortex plate near the bottom, an air outlet pipe is fixedly connected to the left side of the vortex plate near the upper side, and a number of evenly distributed connecting pipes are fixedly connected between the outer walls of the vortex plate near the bottom.

[0012] Preferably, a plurality of vertically distributed partitions are fixedly connected to the inner side of the vortex plate, a plurality of evenly distributed ventilation holes are opened on the upper sides of the plurality of partitions, and the ventilation holes on two adjacent partitions are staggered with each other.

[0013] Preferably, a plurality of evenly distributed heat conducting plates are fixedly connected to the left and right sides of the outer wall of the swirl plate.

[0014] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0015] The utility model provides a catalytic oxidation tower for treating VOC tail gas, which adopts the cooperation of an ozone gas distribution device, a heating mechanism, a vortex plate, an air injection pipe, an air outlet pipe, a connecting pipe, a partition, an air vent and a heat conduction plate. The VOC tail gas and ozone are fully mixed by the ozone gas distribution device, and the vortex plate heats the mixed gas to increase the reaction temperature and the reaction efficiency, so that the VOC tail gas is catalytically oxidized at a higher rate, so that it is quickly consumed, so as to reduce the number of overall treatment stages.

[0016] The utility model provides a catalytic oxidation tower for treating VOC tail gas, which adopts the cooperation of standard sections, fixing mechanisms, slots, plug blocks and rubber pads, and multiple standard sections are connected to each other through the mutual sleeve connection of the slots and the plug blocks, so that the whole can be divided into multiple units, so that when a component on a certain level is damaged, it can be replaced, thereby reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a partial cross-sectional three-dimensional structural schematic diagram of the utility model;

[0019] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure of the middle A part;

[0020] Figure 4 It is a schematic diagram of an inverted three-dimensional structure of the heating mechanism of the utility model;

[0021] Figure 5 It is a partial cross-sectional three-dimensional structural schematic diagram of the vortex plate portion of the utility model.

[0022] In the figure: 1. support frame; 2. standard section; 3. fixing mechanism; 31. slot; 32. plug-in block; 33. rubber pad; 4. heating mechanism; 41. vortex plate; 42. air injection pipe; 43. air outlet pipe; 44. connecting pipe; 45. partition; 46. vent hole; 47. heat conduction plate; 5. cover; 6. ozone distribution device; 7. catalyst. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figure 1 , Figure 2 As shown, a catalytic oxidation tower for treating VOC tail gas comprises a support frame 1, a plurality of vertically distributed standard sections 2 are fixedly connected to the upper side of the support frame 1, a fixing mechanism 3 is movably sleeved on the upper sides of the plurality of standard sections 2, a heating mechanism 4 is fixedly connected to the inner middle parts of the plurality of standard sections 2, a sealing cover 5 is placed on the upper side of the uppermost standard section 2, an ozone distribution device 6 is movably installed on the inner sides of the plurality of standard sections 2 near the bottom, and a catalyst 7 is fixedly sleeved on the inner sides of the plurality of standard sections 2 near the upper sides.

[0025] It should be noted that an air intake duct is fixedly connected to the middle of the lower side of the lowest standard section 2, an exhaust duct is provided on the upper side of the cover 5, a cavity is provided inside the side wall of the standard section 2, and an insulation layer is filled inside to prevent the internal temperature from being lost to the outside of the box.

[0026] like Figure 2 , Figure 3 As shown, two adjacent standard sections 2 are fixed together by screws, and the fixing mechanism 3 includes an insert block 32. The upper side of the insert block 32 is fixedly connected to the lower surface of the standard section 2 except the lowermost side or the lower surface of the cover 5 near the edge. A slot 31 is provided on the upper side of the standard section 2, and the outer side of the insert block 32 is movably sleeved on the inner side of the slot 31.

[0027] It should be noted that the inner side of the plug block 32 near the upper side is in a trapezoidal shape, and the upper side of the plug block 32 is in a trapezoidal shape, which is convenient for installing the two standard sections 2 together.

[0028] like Figure 3 As shown, a rubber pad 33 is fixedly sleeved on the inner side of the slot 31 near the bottom.

[0029] It should be noted that the rubber pad 33 is used to fill the gap to prevent internal or external gas from overflowing. The rubber pad 33 is made of silicone rubber, which is more resistant to oxidation.

[0030] like Figure 4 As shown, the heating mechanism 4 includes a vortex plate 41, the upper and lower sides of which are fixedly connected to the inner middle part of the standard section 2 through a support frame, an air injection pipe 42 is fixedly connected to the right side of the vortex plate 41 near the bottom, an air outlet pipe 43 is fixedly connected to the left side of the vortex plate 41 near the upper side, and a number of evenly distributed connecting pipes 44 are fixedly connected between the outer walls of the vortex plate 41 near the bottom.

[0031] It should be noted that the air injection pipe 42 introduces hot air, and the connecting pipe 44 quickly fills the entire vortex plate 41 with hot air. When the mixed gas passes through the vortex plate 41, the hot air heats it, causing it to heat up, and finally the gas is discharged from the connecting pipe 44.

[0032] like Figure 5 As shown, a plurality of vertically distributed partitions 45 are fixedly connected to the inner side of the vortex plate 41 , and a plurality of evenly distributed vents 46 are formed on the upper sides of the plurality of partitions 45 , and the vents 46 on two adjacent partitions 45 are staggered.

[0033] It should be noted that the partition 45 is used to isolate the interior of the vortex plate 41 into multiple levels, and the gas can only pass through the vents 46 to extend the time that the hot air stays inside the vortex plate 41 so that the hot air can be fully utilized as much as possible.

[0034] like Figure 4 As shown, a plurality of evenly distributed heat conducting plates 47 are fixedly connected to the left and right sides of the outer wall of the swirl plate 41 .

[0035] It should be noted that the heat conducting plate 47 is used to conduct the temperature outside the swirl plate 41 to improve the heat radiation efficiency of the swirl plate 41 to the outside.

[0036] The working principle of the utility model is as follows: first, the air injection pipe 42 introduces hot air, and the connecting pipe 44 quickly fills the entire vortex plate 41 with hot air. When the mixed gas passes through the vortex plate 41, the hot air heats it to raise its temperature. Finally, the gas is discharged from the connecting pipe 44. The partition 45 is used to isolate the inside of the vortex plate 41 into multiple layers, and the gas can only pass through the vent 46 to extend the time that the hot air stays in the vortex plate 41, so that the hot air can be fully utilized as much as possible. The heat conduction plate 47 is used to conduct the temperature outside the vortex plate 41 to improve the external heat radiation efficiency of the vortex plate 41. The VOC tail gas and ozone are fully oxidized through the ozone distribution device 6. Mixing, the vortex plate 41 heats the mixed gas, increases the reaction temperature, and increases the reaction efficiency, causing the VOC tail gas to be catalytically oxidized at a higher rate, causing it to be consumed quickly, so as to reduce the number of overall treatment levels. Finally, the inner side of the plug block 32 near the upper side is trapezoidal in shape, and the upper side of the plug block 32 is trapezoidal in shape, which is convenient for installing two standard sections 2 together. The rubber pad 33 is used to fill the gap to prevent internal or external gas from overflowing. Through the mutual connection of the slot 31 and the plug block 32, multiple standard sections 2 are connected to each other, so that the whole can be divided into multiple units, which is convenient for replacing components at a certain level when they are damaged, thereby reducing maintenance costs.

[0037] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A catalytic oxidation tower for treating VOC tail gas, comprising a support frame (1), characterized in that: A plurality of vertically distributed standard sections (2) are fixedly connected to the upper side of the support frame (1); a fixing mechanism (3) is movably sleeved on the upper side of the plurality of standard sections (2); a heating mechanism (4) is fixedly connected to the middle of the inner side of the plurality of standard sections (2); a cover (5) is placed on the upper side of the uppermost standard section (2); an ozone distribution device (6) is movably installed on the inner side of the plurality of standard sections (2) near the bottom; and a catalyst (7) is fixedly sleeved on the inner side of the plurality of standard sections (2) near the upper side.

2. A catalytic oxidation tower for treating VOC tail gas according to claim 1, characterized in that: Two adjacent standard sections (2) are fixedly connected together by screws, and the fixing mechanism (3) comprises an insert block (32). The upper side of the insert block (32) is fixedly connected to the lower surface of the standard section (2) other than the lowermost side or to a position close to the edge of the lower surface of the cover (5). A slot (31) is provided on the upper side of the standard section (2), and the outer side of the insert block (32) is movably sleeved on the inner side of the slot (31).

3. A catalytic oxidation tower for treating VOC tail gas according to claim 2, characterized in that: A rubber pad (33) is fixedly sleeved on the inner side of the slot (31) near the bottom.

4. The catalytic oxidation tower for VOC tail gas treatment according to claim 1, characterized in that: The heating mechanism (4) comprises a vortex plate (41), the upper and lower sides of the vortex plate (41) being fixedly connected to the inner middle part of the standard section (2) via a support frame, the right side of the vortex plate (41) being fixedly connected to a gas injection pipe (42) at a position close to the bottom, the left side of the vortex plate (41) being fixedly connected to a gas outlet pipe (43) at a position close to the upper side, and a plurality of evenly distributed connecting pipes (44) being fixedly connected between the outer walls of the vortex plate (41) at a position close to the bottom.

5. A catalytic oxidation tower for treating VOC tail gas according to claim 4, characterized in that: A plurality of vertically distributed partitions (45) are fixedly connected to the inner side of the vortex plate (41), and a plurality of evenly distributed ventilation holes (46) are provided on the upper sides of the plurality of partitions (45), and the ventilation holes (46) on two adjacent partitions (45) are staggered.

6. A catalytic oxidation tower for treating VOC tail gas according to claim 4, characterized in that: A plurality of evenly distributed heat conducting plates (47) are fixedly connected to the left and right sides of the outer wall of the vortex plate (41).

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