Organic waste gas catalytic combustion device

Abstract

The utility model relates to the technical field of organic waste gas treatment, and discloses an organic waste gas catalytic combustion device which comprises a shell, a heat exchanger, an electric heater, a catalytic combustion catalyst grid and a pretreating agent grid. The heat exchanger is arranged in the shell, the electric heater is inserted into the shell from the top of the shell, the pretreating agent grating is located below the electric heater, the catalytic combustion catalyst grating is located below the pretreating agent grating, and a pretreating agent cavity is supported on the pretreating agent grating. A catalytic combustion catalyst chamber is supported on the catalytic combustion catalyst grid. According to the utility model, the pretreatment agent chamber is arranged, and a pretreatment agent in the pretreatment agent chamber captures metal elements in organic waste gas and enriches the metal elements on the pretreatment agent, so that the poisoning of the metal elements to a rear-end catalytic combustion catalyst is avoided, the efficiency of the rear-end main catalytic combustion catalyst is improved, and the service life of the rear-end main catalytic combustion catalyst is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of organic waste gas treatment, in particular to a catalytic combustion device for organic waste gas. Background Art

[0002] The catalytic combustion device is an organic waste gas treatment technology that oxidizes organic waste gas into carbon dioxide and water through the catalytic function of catalytic combustion catalyst. It has the characteristics of low temperature and high purification efficiency. It is widely used in organic waste gas treatment in chemical, rubber, pharmaceutical, electronics and other industries.

[0003] Some organic waste gas from industries like coatings, electronics, and chemicals contains certain amounts of metal elements, such as calcium, zinc, and copper. When these metals enter catalytic combustion devices, they coat the surface of the catalyst, masking its active sites and rendering it inactive. Currently, there's no effective solution for this problem in catalytic combustion devices. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a catalytic combustion device for organic waste gas.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: a catalytic combustion device for organic waste gas, comprising a shell, a heat exchanger, an electric heater, a catalytic combustion catalyst grid, and a pretreatment agent grid;

[0006] The heat exchanger is arranged inside the shell, and a catalytic combustion device air inlet is provided on the side of the shell, and a catalytic combustion device air outlet is provided on the top of the shell. The catalytic combustion device air inlet is connected to the cold side air inlet of the heat exchanger, and the catalytic combustion device air outlet is connected to the hot side air outlet of the heat exchanger. The electric heater is inserted into the shell from the top of the shell, and the catalytic combustion catalyst grid and the pretreatment agent grid are both located inside the shell, the pretreatment agent grid is located below the electric heater, and the catalytic combustion catalyst grid is located below the pretreatment agent grid. A pretreatment agent chamber is supported on the pretreatment agent grid, and a catalytic combustion catalyst chamber is supported on the catalytic combustion catalyst grid.

[0007] Furthermore, the inner wall of the shell is provided with a heat-insulating layer.

[0008] Furthermore, an explosion vent is provided on the top of the shell.

[0009] Furthermore, the catalytic combustion catalyst grid height is 20-50mm, the length and width of the grid holes are the same, and the single-side hole size is 35-60mm.

[0010] Furthermore, the pretreatment agent grid height is 20-50mm, the length and width of the grid holes are the same, and the single-side hole size is 35-60mm.

[0011] Furthermore, the catalytic combustion catalyst chamber height is 200-500mm.

[0012] Furthermore, the height of the pretreatment agent chamber is 50-200 mm.

[0013] Furthermore, the distance between the pretreatment agent grid and the bottom of the electric heater is 200-300mm.

[0014] The beneficial effects of the present invention are as follows: by setting up a pretreatment agent chamber, the pretreatment agent in the pretreatment agent chamber captures the metal elements in the organic waste gas, and enriches the metal elements on the pretreatment agent, thereby avoiding the poisoning of the rear-end catalytic combustion catalyst by the metal elements, and improving the efficiency and service life of the rear-end main catalytic combustion catalyst. The waste gas treated with the pretreatment agent enters the catalytic combustion catalyst chamber and undergoes deep catalytic combustion on the surface of the catalytic combustion catalyst, thereby realizing deep treatment of the waste gas. The catalytic combustion device has the characteristics of high purification efficiency and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural sectional view of the utility model.

[0017] In the figure: 1. Shell; 2. Insulation layer; 3. Air inlet of catalytic combustion device; 4. Air outlet of catalytic combustion device; 5. Heat exchanger; 6. Electric heater; 7. Catalytic combustion catalyst grid; 8. Catalytic combustion catalyst chamber; 9. Pretreatment agent grid; 10. Pretreatment agent chamber; 11. Explosion vent. DETAILED DESCRIPTION

[0018] Example:

[0019] like Figure 1 and Figure 2 As shown, a catalytic combustion device for organic waste gas includes a housing 1, a heat exchanger 5, an electric heater 6, a catalytic combustion catalyst grid 7, and a pretreatment agent grid 9;

[0020] The heat exchanger 5 is arranged inside the shell 1, and a catalytic combustion device air inlet 3 is provided on the side of the shell 1. A catalytic combustion device air outlet 4 is provided on the top of the shell 1. The catalytic combustion device air inlet 3 is connected to the cold side air inlet of the heat exchanger 5, and the catalytic combustion device air outlet 4 is connected to the hot side air outlet of the heat exchanger 5. The electric heater 6 is inserted into the shell 1 from the top of the shell 1, and the catalytic combustion catalyst grid 7 and the pretreatment agent grid 9 are both located inside the shell 1. The pretreatment agent grid 9 is located below the electric heater 6, and the catalytic combustion catalyst grid 7 is located below the pretreatment agent grid 9. A pretreatment agent chamber 10 is supported on the pretreatment agent grid 9, and a catalytic combustion catalyst chamber 8 is supported on the catalytic combustion catalyst grid 7.

[0021] Preferably, in this embodiment, a heat-insulating layer 2 is provided on the inner wall of the shell 1 .

[0022] Preferably, in this embodiment, an explosion relief hole 11 is further provided on the top of the shell 1 .

[0023] In this embodiment, the catalytic combustion catalyst grille 7 is preferably 40 mm in height, the grille holes have the same length and width, and the size of a single-side hole is 50 mm.

[0024] In this embodiment, the pretreatment agent grid 9 is preferably 40 mm in height, the grid holes have the same length and width, and the size of a single-side hole is 50 mm.

[0025] Preferably, in this embodiment, the catalytic combustion catalyst chamber 8 has a height of 400 mm.

[0026] Preferably, in this embodiment, the height of the pretreatment agent chamber 10 is 100 mm.

[0027] Preferably, in this embodiment, the distance between the pretreatment agent grid 9 and the bottom of the electric heater 6 is 250 mm.

[0028] Working principle:

[0029] Organic waste gas containing metal elements (20-30°C) first enters the cold side of the heat exchanger 5 through the air inlet 3 of the catalytic combustion device, and exchanges heat with the high-temperature gas after catalytic combustion in the heat exchanger 5 to increase the temperature of the waste gas, saving operating energy consumption. The waste gas temperature after heat exchange is 200-250°C. The waste gas after heat exchange is heated by the electric heater 6 to supplement heat. After reaching the set temperature (300-350°C), the waste gas enters the pretreatment agent chamber 10. The pretreatment agent in the pretreatment agent chamber 10 captures the metal elements in the waste gas and combines them with the active components on the pretreatment agent. Then, the pretreated waste gas enters the catalytic combustion catalyst chamber 8 and undergoes catalytic combustion reaction on the catalytic combustion catalyst. The gas temperature after the catalytic combustion reaction reaches 330-380°C. Then the high-temperature gas enters the hot side of the heat exchanger 5 to exchange heat with the cold side waste gas and is discharged through the air outlet 4 of the catalytic combustion device. The discharge temperature is 120-160°C.

[0030] The pretreatment agent is a cordierite porous ceramic material with lanthanum zirconium (active component) coated on the surface, and the catalytic combustion catalyst is a platinum palladium noble metal catalyst.

[0031] The above-described embodiments are only preferred solutions of the present invention and do not limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

[0032] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

Claims

1. A catalytic combustion device for organic waste gas, characterized by: It includes a shell, a heat exchanger, an electric heater, a catalytic combustion catalyst grid, and a pretreatment agent grid; The heat exchanger is arranged inside the shell, and a catalytic combustion device air inlet is provided on the side of the shell, and a catalytic combustion device air outlet is provided on the top of the shell. The catalytic combustion device air inlet is connected to the cold side air inlet of the heat exchanger, and the catalytic combustion device air outlet is connected to the hot side air outlet of the heat exchanger. The electric heater is inserted into the shell from the top of the shell, and the catalytic combustion catalyst grid and the pretreatment agent grid are both located inside the shell, the pretreatment agent grid is located below the electric heater, and the catalytic combustion catalyst grid is located below the pretreatment agent grid. A pretreatment agent chamber is supported on the pretreatment agent grid, and a catalytic combustion catalyst chamber is supported on the catalytic combustion catalyst grid.

2. The organic waste gas catalytic combustion device according to claim 1, characterized in that: The inner wall of the shell is provided with a heat-insulating layer.

3. The catalytic combustion device for organic waste gas according to claim 1, characterized in that: An explosion relief port is also provided on the top of the shell.

4. The catalytic combustion device for organic waste gas according to claim 1, characterized in that: The catalytic combustion catalyst grid has a height of 20-50 mm, the grid holes have the same length and width, and the size of a single-side hole is 35-60 mm.

5. The catalytic combustion device for organic waste gas according to claim 1, characterized in that: The height of the pretreatment agent grid is 20-50 mm, the length and width of the grid holes are the same, and the size of the single-side holes is 35-60 mm.

6. The catalytic combustion device for organic waste gas according to claim 1, characterized in that: The catalytic combustion catalyst chamber has a height of 200-500 mm.

7. The catalytic combustion device for organic waste gas according to claim 1, characterized in that: The height of the pretreatment agent chamber is 50-200 mm.

8. The catalytic combustion device for organic waste gas according to claim 1, characterized in that: The distance between the pretreatment agent grid and the bottom of the electric heater is 200-300 mm.

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