A catalytic burner for exhaust gas treatment

Abstract

The utility model discloses a kind of catalytic combustors of waste gas treatment, including reaction cavity, the right side of reaction cavity is equipped with combustion engine and feeding mechanism, further including mounting mechanism;Mounting mechanism: it includes slot, guide rod, support frame, locating post, catalyst layer and blocking component, the front and rear two sides of reaction cavity are all provided with slot, the inside left and right sides of slot are all equipped with guide rod, between the two guide rods in same slot, one support frame is slidably connected, the upper inclined surface of support frame is equipped with the locating post of evenly distributed in slot opening, between four locating posts in same support frame, one catalyst layer is equipped with, the catalytic combustor of this waste gas treatment, by mounting mechanism, catalyst layer is installed in the inside of reaction cavity, convenient to dismount, catalyst layer can be quickly replaced, and when catalyst layer is replaced, it does not need to stop, can always carry out waste gas catalytic combustion treatment work.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically to a catalytic burner for waste gas treatment. Background Technology

[0002] Catalytic combustion of waste gas is a highly efficient and environmentally friendly waste gas treatment technology. Its core is to reduce the combustion activation energy of organic matter in waste gas through a catalyst, so that it can be completely oxidized and decomposed into harmless carbon dioxide and water at low temperature. Compared with traditional direct combustion, it has significant advantages such as low energy consumption, no secondary pollution, and wide range of applicable concentrations. It is widely used in waste gas treatment in industries such as chemical, coating, printing, and pharmaceutical. Catalytic combustion of waste gas requires the use of a catalytic burner.

[0003] When existing catalytic burners are in use, exhaust gas is usually introduced into the reaction chamber by a fan. The burner heats the exhaust gas, and after the temperature rises, the exhaust gas comes into contact with the catalyst layer. Under the action of the catalyst, the organic matter in the exhaust gas undergoes an oxidation reaction at a lower temperature to produce carbon dioxide and water, while releasing heat. The released heat is used to preheat the exhaust gas before it is heated by the burner to recover heat.

[0004] The following problems exist: After working for a period of time, the catalyst will weaken and fail, and the catalyst layer needs to be replaced. The catalyst layer is located inside the catalytic burner, which is inconvenient to replace. In addition, in order to prevent the leakage of exhaust gas, the machine needs to be stopped during the replacement, which is quite troublesome. Therefore, we propose a catalytic burner for exhaust gas treatment. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a catalytic combustor for waste gas treatment. The catalyst layer is installed inside the reaction chamber through an installation mechanism, which is convenient to install and disassemble, and the catalyst layer can be replaced quickly. Moreover, the machine does not need to be stopped when replacing the catalyst layer, and the catalytic combustion treatment of waste gas can be carried out continuously, which can effectively solve the problems in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a catalytic burner for waste gas treatment, comprising a reaction chamber, a burner and a feeding mechanism on the right side of the reaction chamber, and an installation mechanism;

[0007] The installation mechanism includes slots, guide rods, a support frame, positioning columns, a catalyst layer, and a blocking assembly. Slots are provided on both the front and rear sides of the reaction chamber. Guide rods are provided on both the left and right sides inside the slots. A support frame is slidably connected between two guide rods located in the same slot. Positioning columns are evenly distributed in the slots opened on the upper inclined surface of the support frame. A catalyst layer is provided between four positioning columns located in the same support frame. Blocking assemblies are provided on both the front and rear sides inside the reaction chamber. The catalyst layer is installed inside the reaction chamber through the installation mechanism. It is easy to install and remove, and the catalyst layer can be replaced quickly. Moreover, the catalytic combustion treatment of exhaust gas can continue without stopping the machine when replacing the catalyst layer.

[0008] Furthermore, the installation mechanism also includes a sealing ring and a limiting plate. The inner wall of each slot is provided with a sealing ring, and the inner wall of each sealing ring is in contact with the outer surface of the frame of the catalyst layer on the same side. A limiting plate is provided on the upper side between the two slots. The lower surface of the limiting plate is in contact with the upper surface of the two catalyst layers on the front and rear sides respectively, making it difficult to fix the catalyst layer in the support frame.

[0009] Furthermore, the blocking assembly includes a clearance groove, a rotating shaft, and a blocking plate. Clearance grooves are provided on both the front and rear walls of the reaction chamber, and a blocking plate is rotatably connected to the lower right side of the clearance groove through a rotating shaft to facilitate the blocking of exhaust gas.

[0010] Furthermore, motors are provided on both the front and rear sides of the reaction chamber, and the output shafts of the motors are fixedly connected to the left end of the rotating shaft on the same side. The input ends of the motors are electrically connected to the output ends of the external controllers to facilitate the control of the baffle plate flipping.

[0011] Furthermore, the reaction chamber is equipped with a partition that divides the interior of the reaction chamber into upper and lower chambers, which are respectively a waste heat recovery chamber and a heating reaction chamber. The burner is installed in an installation slot on the right wall of the heating reaction chamber. A positioning bracket is provided on the left side of the bottom wall of the heating reaction chamber. The positioning bracket has a heat storage layer inside. The input end of the burner is electrically connected to the output end of an external controller to facilitate the realization of the catalytic combustion function.

[0012] Furthermore, the feeding mechanism includes a protective cover, a fan, and a feed pipe. The upper surface of the reaction chamber is provided with a protective cover, and the right side of the reaction chamber is provided with a fan. The exhaust end of the fan is connected to the air inlet of the protective cover through the feed pipe. The input end of the fan is electrically connected to the output end of an external controller to facilitate the introduction of waste gas into the reaction chamber.

[0013] Furthermore, the feeding mechanism also includes through holes, heat exchange tubes, and guide plates. The top wall of the waste heat recovery chamber is provided with evenly distributed through holes, and heat exchange tubes are provided on the lower side of each through hole. The protective cover and the heating reaction chamber are connected by heat exchange tubes. The interior of the waste heat recovery chamber is provided with evenly distributed guide plates to facilitate waste heat recovery.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This catalytic burner for waste gas treatment has the following advantages:

[0015] When the catalyst layer needs to be replaced, the rotating shaft on one side drives the baffle plate to rotate 90 degrees, covering the slot to prevent exhaust gas leakage during the replacement process. Under the constraint of the guide rod, the support frame is pulled out along the slot, and then the catalyst layer can be removed from the support frame. The new catalyst layer is placed into the support frame through the positioning post, and the support frame is pushed back into the slot. Under the action of the limiting plate and the inner wall of the slot, the catalyst layer is fixed in the support frame. After the catalyst layer on one side is replaced, the baffle plate rotates back to avoid the slot, and the above operation is repeated to replace the catalyst layer on the other side. The catalyst layer is easy to install and remove, and the replacement of the catalyst layer can be completed quickly. Moreover, the machine does not need to be stopped when replacing the catalyst layer, and the catalytic combustion treatment of exhaust gas can continue. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the installation mechanism of this utility model;

[0019] Figure 4 This is a schematic diagram of the exploded structure of the installation mechanism of this utility model.

[0020] In the diagram: 1 Reaction chamber, 11 Heating reaction chamber, 12 Waste heat recovery chamber, 2 Baffle, 3 Mounting mechanism, 31 Slot, 32 Guide rod, 33 Support frame, 34 Positioning column, 35 Catalyst layer, 36 Barrier assembly, 361 Clearance groove, 362 Rotating shaft, 363 Barrier plate, 37 Sealing ring, 38 Limiting plate, 4 Positioning bracket, 5 Heat storage layer, 6 Burner, 7 Feeding mechanism, 71 Protective cover, 72 Fan, 73 Feed pipe, 74 Through hole, 75 Heat exchanger tube, 76 Baffle plate, 8 Motor. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-4 This embodiment provides a technical solution: a catalytic burner for waste gas treatment, including a reaction chamber 1, a burner 6 and a feeding mechanism 7 on the right side of the reaction chamber 1, characterized in that: it also includes an installation mechanism 3, a partition 2 is provided inside the reaction chamber 1, the partition 2 divides the interior of the reaction chamber 1 into upper and lower chambers, the upper and lower chambers being a waste heat recovery chamber 12 and a heating reaction chamber 11, respectively, the burner 6 is installed in an installation groove opened in the right wall of the heating reaction chamber 11, a positioning bracket 4 is provided on the left side of the bottom wall of the heating reaction chamber 11, and a heat storage layer 5 is provided inside the positioning bracket 4 (the heat storage material of the heat storage layer 5 is usually made of a material with high thermal conductivity and high heat capacity). Materials with good thermal stability and corrosion resistance, such as honeycomb ceramics, are used. The input end of the burner 6 is electrically connected to the output end of the external controller. When the burner 6 is working, the temperature of the exhaust gas rises. Then the exhaust gas passes through the heat storage layer 5 on the positioning bracket 4. When the exhaust gas flows through the heat storage layer 5, the excess heat it carries is efficiently absorbed and stored by the heat storage layer 5. In subsequent cycles, it is released to the low-temperature exhaust gas to be treated, preheating it to near the ignition temperature of the catalytic reaction, reducing the energy consumption of the burner 6 for heating. When the exhaust gas passes through the catalytic layer 35, the organic molecules activated by the catalyst in the exhaust gas and the oxygen in the exhaust gas undergo an oxidation reaction, decomposing into carbon dioxide and water, while releasing heat.

[0023] Installation mechanism 3 includes slots 31, guide rods 32, support frame 33, positioning posts 34, catalyst layer 35, and blocking assembly 36. Slots 31 are provided on both the front and rear sides of the reaction chamber 1. Guide rods 32 are provided on both the left and right sides inside the slots 31. A support frame 33 is slidably connected between two guide rods 32 located in the same slot 31. (Fixing studs are provided on both the front and rear sides of the reaction chamber 1, and the support frame 33 is fixed to the reaction chamber 1 by nuts and fixing studs). Positioning posts 34 are evenly distributed in the slots on the upper inclined surface of the support frame 33. A catalyst layer 35 is provided between four positioning posts 34 located in the same support frame 33. The internal front and rear sides of the 1 are provided with blocking components 36. The mounting mechanism 3 also includes a sealing ring 37 and a limiting plate 38. The inner wall of the slot is provided with a sealing ring 37 (the sealing ring 37 can be a graphite sealing ring). The inner wall of the sealing ring 37 is in contact with the outer surface of the frame of the catalyst layer 35 on the same side. A limiting plate 38 is provided on the upper side between the two slots 31. The lower surface of the limiting plate 38 is in contact with the upper surface of the two catalyst layers 35 on the front and rear sides respectively. The blocking component 36 includes a relief groove 361, a rotating shaft 362 and a blocking plate 363. The front and rear walls of the reaction chamber 1 are provided with relief grooves 361. The lower right side of the relief groove 361 is rotatably connected to the blocking plate 363 through the rotating shaft 362. Motors 8 are installed on both the front and rear sides of the reaction chamber 1. The output shafts of the motors 8 are fixedly connected to the left end of the rotating shaft 362 on the same side. (The motors 8 are installed on the front and rear sides of the reaction chamber 1 via support frames. The support frames can be stainless steel support frames wrapped with ceramic fiber cotton. The output shafts of the motors 8 can be coated with a ceramic coating so that the output shafts of the motors 8 can operate normally in high-temperature environments.) The input ends of the motors 8 are electrically connected to the output ends of external controllers. When the catalyst layer 35 needs to be replaced, one side of the motor 8 operates. The output shaft of the motor 8 drives the baffle plate 363 in the clearance groove 361 to rotate 90 degrees through the rotating shaft 362, covering the slot 31 on one side. Then, the nut is unscrewed, and the guide rod 32 restricts the movement. Next, pull out the support frame 33 along the slot 31, and then remove the catalyst layer 35 from the support frame 33 for replacement. Place the new catalyst layer 35 into the support frame 33 through the positioning post 34, and then push the support frame 33 back into the slot 31. At this time, under the action of the limiting plate 38 and the inner wall of the slot 31, combined with the inclined catalyst layer 35, the catalyst layer 35 is fixed in the support frame 33. Due to the presence of the sealing ring 37, exhaust gas is prevented from passing through the catalyst layer 35 through the gap. After the catalyst layer 35 on one side is replaced, the output shaft of the motor 8 reverses to make the baffle plate 363 flip back to avoid the slot 361. Repeat the above operation to replace the catalyst layer 35 on the other side.

[0024] The feeding mechanism 7 includes a protective cover 71, a fan 72, and a feed pipe 73. The upper surface of the reaction chamber 1 is provided with the protective cover 71, and the right side of the reaction chamber 1 is provided with the fan 72. The exhaust end of the fan 72 is connected to the air inlet of the protective cover 71 via the feed pipe 73. The input end of the fan 72 is electrically connected to the output end of an external controller. The feeding mechanism 7 also includes through holes 74, heat exchange tubes 75, and guide plates 76. The top wall of the waste heat recovery chamber 12 has evenly distributed through holes 74, and heat exchange tubes 75 are provided on the lower side of each through hole 74 (the heat exchange tubes 75 can be made of copper). The protective cover 71 and the heated reaction chamber 1... The two chambers 1 and 2 are connected by heat exchange tubes 75. The waste heat recovery chamber 12 is equipped with evenly distributed guide plates 76. The device for supplying waste gas is connected to the fan 72. Under the control of an external controller, the fan 72 operates and feeds the waste gas into the protective cover 71 through the feed pipe 73. The waste gas passes through the through hole 74 and enters the heating reaction chamber 11 through the heat exchange tube 75. The purified gas is discharged from the reaction chamber 1 under the guidance of the guide plates 76. When the purified gas carries heat and flows through the heat exchange tube 75, it transfers the heat to the waste gas inside the heat exchange tube 75, preheating the waste gas and reducing the energy consumption of the burner 6.

[0025] The working principle of the catalytic burner for waste gas treatment provided by this utility model is as follows: The device for supplying waste gas is connected to the fan 72. Under the control of an external controller, the fan 72 operates, and the waste gas is introduced into the protective cover 71 through the feed pipe 73. The waste gas passes through the through hole 74 and enters the heating reaction chamber 11 through the heat exchange tube 75. The burner 6 operates, and the temperature of the waste gas rises. Then, the waste gas passes through the heat storage layer 5 on the positioning bracket 4. When the waste gas flows through the heat storage layer 5, the excess heat it carries is efficiently absorbed and stored by the heat storage layer 5. In subsequent cycles, it is released to the low-temperature waste gas to be treated, preheating it to near the ignition temperature of the catalytic reaction, reducing the energy consumption of the burner 6 for heating. When the waste gas passes through the catalytic layer 35, the organic molecules activated by the catalyst in the waste gas and the oxygen in the waste gas undergo an oxidation reaction, decomposing into carbon dioxide and water, while releasing heat. The purified gas is discharged from the reaction chamber 1 under the guidance of the guide plate 76. When the purified gas carrying heat flows through the heat exchange tube 75, it transfers the heat to the interior of the heat exchange tube 75. The exhaust gas is preheated to reduce the energy consumption of the burner 6. When the catalyst layer 35 needs to be replaced, the motor 8 on one side works. The output shaft of the motor 8 drives the baffle plate 363 in the clearance groove 361 to rotate 90 degrees through the rotating shaft 362, covering the slot 31 on one side. Then, the nut is unscrewed, and under the restriction of the guide rod 32, the support frame 33 is pulled out along the slot 31. Then, the catalyst layer 35 can be removed from the support frame 33 for replacement. The new catalyst layer 35 is placed into the support frame 33 through the positioning post 34, and then the support frame 33 is pushed back into the slot 31. At this time, under the action of the limiting plate 38 and the inner wall of the slot 31, combined with the tilted catalyst layer 35, the catalyst layer 35 is fixed in the support frame 33. Due to the presence of the sealing ring 37, the exhaust gas is prevented from passing through the catalyst layer 35 through the gap. After the catalyst layer 35 on one side is replaced, the output shaft of the motor 8 reverses to make the baffle plate 363 rotate back to avoid the clearance groove 361. The above operation is repeated to replace the catalyst layer 35 on the other side.

[0026] It is worth noting that the burner 6 disclosed in the above embodiments can be a TJ series burner, the fan 72 can be a 4-72 series centrifugal fan, and the motor 8 can be a NEMA11 stepper motor. The external controller controls the operation of the burner 6, the fan 72 and the motor 8 using methods commonly used in the prior art.

[0027] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A catalytic burner for waste gas treatment, comprising a reaction chamber (1), wherein a burner (6) and a feeding mechanism (7) are provided on the right side of the reaction chamber (1), characterized in that: It also includes the installation mechanism (3); The installation mechanism (3) includes a slot (31), a guide rod (32), a support frame (33), a positioning post (34), a catalyst layer (35), and a blocking assembly (36). The reaction chamber (1) has slots (31) on both the front and rear sides. The slots (31) have guide rods (32) on both the left and right sides. A support frame (33) is slidably connected between two guide rods (32) in the same slot (31). The slots on the upper inclined surface of the support frame (33) have evenly distributed positioning posts (34). A catalyst layer (35) is provided between the four positioning posts (34) in the same support frame (33). The reaction chamber (1) has blocking assemblies (36) on both the front and rear sides.

2. The catalytic combustor for waste gas treatment according to claim 1, characterized in that: The installation mechanism (3) also includes a sealing ring (37) and a limiting plate (38). The inner wall of the slot is provided with a sealing ring (37). The inner wall of the sealing ring (37) is in contact with the outer surface of the frame of the catalyst layer (35) on the same side. A limiting plate (38) is provided on the upper side between the two slots (31). The lower surface of the limiting plate (38) is in contact with the upper surface of the two catalyst layers (35) on the front and rear sides respectively.

3. The catalytic combustor for waste gas treatment according to claim 1, characterized in that: The blocking assembly (36) includes a relief groove (361), a rotating shaft (362) and a blocking plate (363). The front and rear walls of the reaction chamber (1) are provided with relief grooves (361), and the lower right side of the interior of the relief groove (361) is rotatably connected to the blocking plate (363) through the rotating shaft (362).

4. The catalytic combustor for waste gas treatment according to claim 3, characterized in that: The reaction chamber (1) is equipped with motors (8) on both the front and rear sides. The output shafts of the motors (8) are fixedly connected to the left end of the rotating shaft (362) on the same side. The input ends of the motors (8) are electrically connected to the output ends of the external controller.

5. The catalytic combustor for waste gas treatment according to claim 1, characterized in that: The reaction chamber (1) is provided with a partition (2) inside, which divides the interior of the reaction chamber (1) into two chambers, an upper and a lower chamber, which are a waste heat recovery chamber (12) and a heating reaction chamber (11), respectively. The burner (6) is installed in the mounting slot opened on the right wall of the heating reaction chamber (11). The bottom wall of the heating reaction chamber (11) is provided with a positioning bracket (4) on the left side. The positioning bracket (4) is provided with a heat storage layer (5) inside. The input end of the burner (6) is electrically connected to the output end of an external controller.

6. The catalytic combustor for waste gas treatment according to claim 5, characterized in that: The feeding mechanism (7) includes a protective cover (71), a fan (72) and a feed pipe (73). The upper surface of the reaction chamber (1) is provided with a protective cover (71), and the right side of the reaction chamber (1) is provided with a fan (72). The exhaust end of the fan (72) is connected to the air inlet of the protective cover (71) through the feed pipe (73). The input end of the fan (72) is electrically connected to the output end of an external controller.

7. A catalytic combustor for waste gas treatment according to claim 6, characterized in that: The feeding mechanism (7) also includes through holes (74), heat exchange tubes (75) and guide plates (76). The top wall of the waste heat recovery chamber (12) is provided with uniformly distributed through holes (74), and heat exchange tubes (75) are provided on the lower side of each through hole (74). The protective cover (71) is connected to the heating reaction chamber (11) through the heat exchange tubes (75). The interior of the waste heat recovery chamber (12) is provided with uniformly distributed guide plates (76).

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