Catalytic oxidation treatment system for waste gas containing organic silicon
Through the catalytic oxidation treatment system designed with proprietary adsorbent and power rods, the problem of easy deactivation of precious metal catalysts is solved, convenient replacement of adsorbents is achieved, and the stability and economicality of the system are improved.
Patent Information
- Application Number
- CN202421817087.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-07-30
AI Technical Summary
When the existing catalytic oxidation technology treats silicone-containing exhaust gas, noble metal catalysts are easily oxidized, resulting in deactivation of the catalyst, short service life, and the cost and consumption of non-precious metal catalysts are high, resulting in economic losses and increased energy consumption.
Using a combination system of proprietary adsorbent, non-precious metal catalyst and precious metal catalyst, the design of the inner filter box and power rod can achieve convenient replacement of adsorbent, reduce the loading of non-precious metal catalysts, and protect the activity of precious metal catalysts.
It improves the service life of the catalyst, reduces parking replacement and energy consumption losses, ensures the stable operation of the precious metal catalytic oxidation system, and reduces economic losses and energy consumption.
Smart Images
Figure CN223159065U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of industrial waste gas treatment, and particularly to a catalytic oxidation treatment system for waste gas containing silicone. Background Art
[0002] The global atmospheric environment problem has attracted increasing attention. In the past decade or more, China has put forward higher and higher requirements for the treatment of industrial waste gas, mainly reflected in the requirement for non-methane total hydrocarbons increasing from the initial 120mg / N3 to 60mg / N3, and many developed regions are further raising the standard to 30mg / N3 or even 20mg / N3. The regenerative thermal oxidizer was initially promoted as the main waste gas treatment technology, but due to the general trend of "dual carbon", the requirement for energy consumption is getting higher and higher. The regenerative thermal oxidizer usually needs to heat the waste gas temperature to above 760°C for treatment. Therefore, a lower temperature treatment technology, namely catalytic oxidation technology, has been promoted. The catalytic oxidation technology uses noble metal catalysts to lower the activation energy of the reaction, and can oxidize organic substances into CO2 and H2O at only 320°C. And due to the exothermic characteristic of the oxidation reaction, the waste heat generated by the large temperature rise of the outlet gas can be used to heat the inlet gas, thus greatly reducing energy consumption.
[0003] The catalytic oxidation technology has been widely used in industrial waste gas treatment, but there are still bottleneck problems for waste gas containing silicone. The main problem is that silicone is easily oxidized into a large number of silicon dioxides with a small particle size under the action of noble metal catalysts. Silicon dioxide is extremely easy to adhere to the surface of the catalyst, thus covering the active sites of the catalyst and losing catalytic activity, greatly affecting the service life of the catalyst and causing huge economic losses to waste gas treatment enterprises.
[0004] The existing solution is to select a non-noble metal catalyst to pre-oxidize the silicone waste gas, so that the silicone is deposited on the surface of the non-noble metal catalyst, thereby playing a role in protecting the noble metal catalyst. The dosage of the non-noble metal catalyst is huge. Calculated conventionally based on the service life of the noble metal catalyst being four years, the filling amount of the non-noble metal catalyst to reach the corresponding service life is 8-10 times that of the noble metal catalyst. Although the cost of the non-noble metal catalyst is much lower than that of the noble metal catalyst, it is still relatively high compared with the conventional protective bed adsorbent. Summary of the Utility Model
[0005] In order to solve the problems mentioned in the above background art, this application provides a catalytic oxidation treatment system for waste gas containing silicone.
[0006] An organosilicon waste gas catalytic oxidation treatment system provided by the present application adopts the following technical solution: It includes a proprietary adsorbent, a non-noble metal catalyst, and a noble metal catalyst device connected in sequence. The proprietary adsorbent device includes a base plate. A top of the base plate is fixedly provided with an external protection box. A right support vertical plate is fixedly provided at a headquarters on a right side of the external protection box. A rotating shaft is rotatably inserted at a top of the right support vertical plate. A ratchet wheel is fixedly sleeved on an outer circumferential surface of the rotating shaft near a right end. A limiting triangular clamping plate is clamped at a bottom of the outer circumferential surface of the ratchet wheel. A pull rod is fixedly provided at a bottom of the limiting triangular clamping plate. The pull rod is arranged parallel to a right side of the right support vertical plate.
[0007] A right end of the rotating shaft is fixedly sleeved with an internal groove wheel on an outer circumferential surface located inside the right support vertical plate. A circular track groove is fixedly provided in a middle of the internal groove wheel and is fixedly connected with a pull rope. One end of the pull rope away from the internal groove wheel is clamped with a power rod. A bottom of the power rod passes through a top of the external protection box and is fixedly provided on a top of a circular sliding plate. An inner filter box is fixedly provided on a left side of the circular sliding plate. An outer side of the inner filter box is slidably connected with an inner wall of the external protection box.
[0008] Optionally, a cushion plate is arranged between the pull rod and the limiting triangular clamping plate. A spring is sleeved on an outer side of the pull rod. A fixing block is slidably sleeved at a position near a bottom of the pull rod. A left side of the fixing block is fixedly provided on a right side of the right support vertical plate.
[0009] Optionally, the number of the circular sliding plates is two. Outer sides of the two circular sliding plates are slidably arranged on inner walls of chutes at two ends of the inner wall of the external protection box.
[0010] Optionally, an air inlet pipe is fixedly provided in a middle of a front side of the external protection box and is communicated with a middle of the external protection box. A check valve is arranged at a port of the air inlet pipe. Circular holes are fixedly provided at two ends of a top of the external protection box. Outer sides of the power rod and the vertical rod are slidably connected with inner walls of the circular holes.
[0011] Optionally, a left support vertical plate is rotatably sleeved on an outer circumferential surface of a left end of the rotating shaft. A chute with a fixed width is arranged in a middle of the left support vertical plate. A bottom of the left support vertical plate is fixedly provided at a bottom of a left side of the external protection box.
[0012] Optionally, a vertical rod is fixedly provided at a left end of a top of the inner filter box. A sliding rod is rotatably arranged at a top of the vertical rod through a rotating bolt. An angle between the sliding rod and the vertical rod is ninety degrees. The sliding rod is arranged in a "C" shape. A bottom of the sliding rod is slidably arranged on an inner wall of a chute on a left side of the external protection box through a slider. The inner side of the inner filter box is provided with air holes of the same specification. A proprietary adsorbent is placed inside the inner filter box.
[0013] Optionally, sliding buckles are fixedly provided on both sides of a middle position of a top of the sliding rod. Both ends of the sliding buckles are slidably sleeved on an inner wall of a chute in a middle of the left support vertical plate.
[0014] In summary, the present application includes the following beneficial technical effects:
[0015] 1. By providing components such as an inner filter box and a power rod, the power rod drives the inner filter box to slide on the inner wall of the outer protection box under the action of a pulling rope, so as to facilitate the replacement of the adsorbent inside the inner filter box at any time. According to the maximum adsorption capacity of the adsorbent for silicone, the addition of the adsorbent system reduces the filling amount of the non-noble metal catalyst, improves the service life, and reduces the production stoppage caused by replacing the non-noble metal catalyst during a specific period of time and the energy consumption loss caused by restarting the production.
[0016] 2. By the settings of the present utility model, the long-term stable operation of the noble metal catalytic oxidation system is ensured, the economic losses caused by poisoning and production stoppage are reduced, and the multi-tower design of the adsorbent system reduces the risk of noble metal catalyst poisoning caused by a sudden increase in the silicone content in the short term. At the same time, due to the protection of the front-end adsorbent bed layer, the filling amount can be greatly reduced and a polishing effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic diagram of the overall three-dimensional structure in an embodiment of the present application;
[0018] Figure 2 is an exploded structure diagram of the outer protection box in an embodiment of the present application;
[0019] Figure 3 is a three-dimensional structure diagram of the limit triangular clamping plate in an embodiment of the present application;
[0020] Figure 4 is a schematic diagram of the front structure in an embodiment of the present application.
[0021] Reference numerals: 1, base plate; 2, outer protection box; 3, right support vertical plate; 4, pull rod; 5, limit triangular clamping plate; 6, ratchet; 7, inner grooved wheel; 8, pulling rope; 9, rotating shaft; 10, sliding buckle; 11, sliding rod; 12, vertical rod; 13, power rod; 14, left support vertical plate; 15, intake pipe; 16, fixing block; 18, circular sliding plate; 19, inner filter box; 20, check valve. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] The following further elaborates on the present application in conjunction with the attached Figures 1-4 for a more detailed description.
[0023] An embodiment of the present application discloses a catalytic oxidation treatment system for waste gas containing silicone. As Figure 1As shown in the figure, it includes a proprietary adsorbent, a non-noble metal catalyst, and a noble metal catalyst device connected in sequence. The proprietary adsorbent device includes a base plate 1. At the top of the base plate 1, an external protection box 2 is fixedly arranged. In the middle of the front side of the external protection box 2, an air inlet pipe 15 is fixedly arranged and communicated with the middle of the external protection box 2. Connect the air inlet pipe 15 to an external pipeline, and oxidize the silicone waste gas to be treated through the air inlet pipe 15. At the port of the air inlet pipe 15, a check valve 20 is arranged. The check valve 20 prevents the gas entering the interior from leaking to the outside. At both ends of the top of the external protection box 2, round holes are fixedly arranged. The outer sides of the power rod 13 and the vertical rod 12 are both slidably connected to the inner walls of the round holes, facilitating the sliding of the power rod 13 and the vertical rod 12 on the top of the external protection box 2. At the right side of the external protection box 2, a right support vertical plate 3 is fixedly arranged. At the top of the right support vertical plate 3, a rotating shaft 9 is rotatably inserted. On the outer circumferential surface of the rotating shaft 9 near the right end, a ratchet wheel 6 is fixedly sleeved. At the bottom of the outer circumferential surface of the ratchet wheel 6, a limiting triangular clamping plate 5 is clamped. At the bottom of the limiting triangular clamping plate 5, a pull rod 4 is fixedly arranged. A backing plate is arranged between the pull rod 4 and the limiting triangular clamping plate 5. A spring is sleeved on the outer side of the pull rod 4. The spring provides assistance for the reset of the pull rod 4 after movement. Near the bottom position of the pull rod 4, a fixed block 16 is slidably sleeved. The fixed block 16 limits the movement position of the pull rod 4, preventing the pull rod 4 from tilting during movement. The left side of the fixed block 16 is fixedly arranged on the right side of the right support vertical plate 3, and the pull rod 4 is arranged parallel to the right side of the right support vertical plate 3.
[0024] Please refer to Figure 1 , on the outer circumferential surface of the left end of the rotating shaft 9, a left support vertical plate 14 is rotatably sleeved. The left support vertical plate 14 provides support for the rotating shaft 9 to ensure that the rotating shaft 9 is in a stable state. In the middle of the left support vertical plate 14, a chute with a fixed width is arranged, facilitating the sliding of the sliding buckle 10 on the outer side of the sliding rod 11. The bottom of the left support vertical plate 14 is fixedly arranged at the bottom of the left side of the external protection box 2. At the middle position on the top of the sliding rod 11, sliding buckles 10 are fixedly arranged on both sides. The two ends of the sliding buckle 10 are slidably sleeved on the inner wall of the chute in the middle of the left support vertical plate 14. The sliding buckle 10 slides on the inner wall of the left support vertical plate 14 following the movement of the sliding rod 11, preventing the sliding rod 11 from tilting during movement.
[0025] Please refer to Figure 1 , on the outer circumferential surface of the right end of the rotating shaft 9 located inside the right support vertical plate 3, an inner grooved pulley 7 is fixedly sleeved. In the middle of the inner grooved pulley 7, a circular track groove is fixedly arranged and a pull rope 8 is fixedly connected. One end of the pull rope 8 far from the inner grooved pulley 7 is clamped with a power rod 13. The bottom of the power rod 13 passes through the top of the external protection box 2 and is fixedly arranged on the top of a circular sliding plate 18. On the left side of the circular sliding plate 18, an inner filter box 19 is fixedly arranged. The outer side of the inner filter box 19 is slidably connected to the inner wall of the external protection box 2.
[0026] Please refer to Figure 2 , at the left end of the top of the inner filter box 19, a vertical rod 12 is fixedly arranged. The vertical rod 12 moves up and down to follow the movement of the inner filter box 19. The top of the vertical rod 12 is rotatably provided with a sliding rod 11 through a rotating bolt. The angle between the sliding rod 11 and the vertical rod 12 is ninety degrees. The ninety-degree setting prevents the angle between the sliding rod 11 and the vertical rod 12 from changing during movement. The sliding rod 11 is set in a "C" shape. The "C"-shaped sliding rod 11 prevents movement conflicts with the outer wall of the outer protection box 2 during movement. The bottom of the sliding rod 11 is slidably arranged on the inner wall of the chute on the left side of the outer protection box 2 through a slider to ensure vertical movement. The side of the inner filter box 19 is provided with ventilation holes of the same specification. A proprietary adsorbent is placed inside the inner filter box 19 to facilitate the passage of silicone-containing waste gas through the inside of the inner filter box 19.
[0027] Please refer to Figure 2 , the number of circular sliding plates 18 is two. The outer sides of the two circular sliding plates 18 are slidably arranged on the inner walls of the chutes at both ends of the inner wall of the outer protection box 2. The two circular sliding plates 18 slide on the inner wall of the outer protection box 2 to ensure that the circular sliding plates 18 drive the inner filter box 19 in the middle to move vertically.
[0028] The implementation principle of an organic silicon waste gas catalytic oxidation treatment system according to an embodiment of the present application is as follows: Connect the check valve 20 at one end of the air inlet pipe 15 to a pipe containing organic silicon waste gas. The organic silicon waste gas is introduced into the inside of the outer protection box 2 through the air inlet pipe 15. After the gas enters the inside of the outer protection box 2, it enters the inside of the inner filter box 19 containing a proprietary adsorbent. When it is necessary to replace the proprietary adsorbent inside the inner filter box 19, when the rotating shaft 9 rotates under the action of an external force, the inner groove wheel 7 winds up one end of the pull rope 8. As the pull rope 8 shortens, the inner filter box 19 extends out of the outer protection box 2, thereby facilitating the replacement of the proprietary adsorbent inside. When the rotating shaft 9 drives the ratchet wheel 6 to rotate, it is clamped with the top of the limit triangular clamping plate 5. When the ratchet wheel 6 rotates clockwise, the top of the limit triangular clamping plate 5 restricts and clamps the top of the ratchet wheel 6, preventing the ratchet wheel 6 from rotating counterclockwise. When it is necessary to retract the inner filter box 19 inward, the ratchet wheel 6 needs to rotate counterclockwise, pull the pull rod 4 downward, and the limit triangular clamping plate 5 disengages from the clamping of the ratchet wheel 6, enabling the rotating shaft 9 to rotate counterclockwise, achieving the effect of retracting the inner filter box 19.
[0029] The waste gas is cooled to below 60°C and enters the adsorbent system. The adsorbent system consists of three adsorption towers in series. Each adsorption tower is filled with 18 m3 of Selexsorb SI adsorbent, and one tower is cut out for replacement every year.
[0030] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. An organic silicon waste gas catalytic oxidation treatment system, comprising a proprietary adsorbent, a non-noble metal catalyst, and a noble metal catalyst device connected in sequence, wherein the proprietary adsorbent device includes a base plate (1), and is characterized in that: The top of the base plate (1) is fixedly provided with an external protection box (2). The right side of the external protection box (2) is fixedly provided with a right support vertical plate (3). The top of the right support vertical plate (3) is rotationally inserted with a rotating shaft (9). A ratchet wheel (6) is fixedly sleeved on the outer circumferential surface of the rotating shaft (9) near the right end. The bottom of the outer circumferential surface of the ratchet wheel (6) is clamped with a limiting triangular clamping plate (5). The bottom of the limiting triangular clamping plate (5) is fixedly provided with a pull rod (4). The pull rod (4) is arranged parallel to the right side of the right support vertical plate (3). The right end of the rotating shaft (9) is located inside the right support vertical plate (3), and an internal grooved pulley (7) is fixedly sleeved on the outer circumferential surface. A circular track groove is fixedly provided in the middle of the internal grooved pulley (7) and is fixedly connected with a pull rope (8). One end of the pull rope (8) far from the internal grooved pulley (7) is clamped with a power rod (13). The bottom of the power rod (13) passes through the top of the external protection box (2) and is fixedly arranged on the top of a circular slide plate (18). The left side of the circular slide plate (18) is fixedly provided with an inner filter box (19). The outer side of the inner filter box (19) is slidably connected with the inner wall of the external protection box (2).
2. The catalytic oxidation treatment system for organosilicon waste gas according to claim 1, wherein: A spacer plate is arranged between the pull rod (4) and the limiting triangular clamping plate (5). A spring is sleeved on the outer side of the pull rod (4). The pull rod (4) is slidably sleeved with a fixing block (16) near the bottom position. The left side of the fixing block (16) is fixedly arranged on the right side of the right support vertical plate (3).
3. The catalytic oxidation treatment system for organosilicon waste gas according to claim 1, wherein: The number of the circular slide plates (18) is two. The outer sides of the two circular slide plates (18) are slidably arranged on the inner walls of the chutes at both ends of the inner wall of the external protection box (2).
4. The catalytic oxidation treatment system for organosilicon waste gas according to claim 1, characterized in that: The middle part of the front side of the external protection box (2) is fixedly provided with an air inlet pipe (15) and is communicated with the middle of the external protection box (2). A check valve (20) is arranged at the port of the air inlet pipe (15). The two ends of the top of the external protection box (2) are fixedly provided with round holes. The outer sides of the power rod (13) and the vertical rod (12) are both slidably connected with the inner walls of the round holes.
5. The catalytic oxidation treatment system for organosilicon waste gas according to claim 1, characterized in that: The left end of the outer circumferential surface of the rotating shaft (9) is rotationally sleeved with a left support vertical plate (14). A chute with a fixed width is arranged in the middle of the left support vertical plate (14). The bottom of the left support vertical plate (14) is fixedly arranged at the bottom of the left side of the external protection box (2).
6. The catalytic oxidation treatment system for organosilicon waste gas according to claim 1, wherein: The left end of the top of the inner filter box (19) is fixedly provided with a vertical rod (12). The top of the vertical rod (12) is rotationally provided with a sliding rod (11) through a rotating bolt. The angle between the sliding rod (11) and the vertical rod (12) is ninety degrees. The sliding rod (11) is arranged in a "C" shape. The bottom of the sliding rod (11) is slidably arranged on the inner wall of the chute on the left side of the external protection box (2) through a slider. The side of the inner filter box (19) is provided with air vents of the same specification. A special adsorbent is placed inside the inner filter box (19).
7. The catalytic oxidation treatment system for organosilicon waste gas according to claim 6, wherein: Sliding buckles (10) are fixedly arranged on both sides of the middle position of the top of the sliding rod (11). The two ends of the sliding buckles (10) are slidably sleeved on the inner walls of the chute in the middle of the left support vertical plate (14).