Catalytic oxidation furnace

Abstract

The utility model belongs to the field of waste gas treatment equipment, and provides a catalytic oxidation furnace which comprises a furnace body, a gas inlet pipe, a gas outlet pipe, a gas inlet pipe, a gas outlet pipe and a gas outlet pipe, a heating device, a first-stage catalyst assembly and a second-stage catalyst assembly are sequentially arranged in the U-shaped channel in the airflow direction. According to the catalytic oxidation furnace disclosed by the utility model, the design of the U-shaped channel is adopted, and the heating device, the first-stage catalyst component and the second-stage catalyst component are reasonably arranged, so that waste gas can uniformly flow along the U-shaped channel in the heating and catalytic reaction processes, and the purposes of efficiently and uniformly heating the gas and fully decomposing the waste gas are achieved; therefore, the technical effects of high catalytic oxidation efficiency, good equipment sealing performance and high heat utilization rate are realized, and the technical problems of non-uniform gas treatment, large heat loss, short catalyst service life and the like in the traditional catalytic oxidation equipment are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas treatment equipment field especially relates to a catalytic oxidation furnace. BACKGROUND

[0002] In the prior art, catalytic oxidation technology is widely used in the field of waste gas treatment. Through the action of the catalyst, the organic matter in the waste gas is completely oxidized and decomposed into harmless carbon dioxide and water vapor at a lower temperature. Compared with the traditional high-temperature thermal oxidation process, the catalytic oxidation technology has the characteristics of low energy consumption and high efficiency. However, the existing catalytic oxidation equipment still has the following problems in actual application:

[0003] Uneven gas flow distribution When the waste gas flows in the catalytic oxidation equipment, the problem of uneven gas flow distribution is easy to occur, which leads to the fact that part of the catalyst cannot be fully utilized, affecting the effect of waste gas treatment.

[0004] Large heat loss

[0005] The utilization rate of heat of the traditional equipment is not high, and the heat is seriously lost during the heating and reaction process of the waste gas, which leads to an increase in the energy consumption of the equipment and a high operating cost.

[0006] Insufficient equipment sealing and durability

[0007] The traditional catalytic oxidation equipment lacks pertinence in structural design, which is easy to cause problems such as gas leakage, heat loss, and insufficient durability, thereby affecting the stability and safety of the equipment.

[0008] In view of the above problems, the present application provides a novel catalytic oxidation furnace, which optimizes the structure of the furnace body, improves the gas flow distribution and heat preservation design, and combines a multi-stage catalytic reaction device to improve the waste gas treatment efficiency, reduce the energy consumption, and prolong the service life of the equipment, thereby better adapting to the actual needs of industrial waste gas treatment. Practical new type content

[0009] The catalytic oxidation furnace of the utility model is used for solving the technical problems related in the background art.

[0010] The technical scheme provided by the utility model is as follows: a catalytic oxidation furnace, comprising: a furnace body, the furnace body has a U-shaped channel, the gas inlet and the gas outlet of the U-shaped channel are at the top of the furnace body;

[0011] The heating device, the first catalyst assembly and the second catalyst assembly are sequentially arranged in the U-shaped channel along the direction of the gas flow.

[0012] In one embodiment, the heating device has three, which are sequentially arranged in the U-shaped channel along the direction of the gas flow.

[0013] In one embodiment, the first catalyst assembly is connected to the first grid, and the first grid is connected to the inner circumferential wall of the U-shaped channel.

[0014] In one embodiment, the second catalyst assembly is connected to the second grid, and the second grid is connected to the inner circumferential wall of the U-shaped channel.

[0015] In one embodiment, the first catalyst assembly and the second catalyst assembly each comprise a blank carrier layer and three catalyst layers, which are sequentially stacked along the airflow direction.

[0016] In one embodiment, the front side of the first catalyst assembly and the back side of the second catalyst assembly are respectively provided with thermocouples.

[0017] In one embodiment, the outer circumferences of the first catalyst assembly and the second catalyst assembly are filled with aluminum silicate refractory fiber blankets between the walls of the U-shaped channel.

[0018] In one embodiment, the furnace body comprises a shell frame, an outer wall plate connected to the outer shell frame, and insulation cotton filled in the shell frame.

[0019] Compared with the prior art, the catalytic oxidation furnace has the following beneficial effects:

[0020] The catalytic oxidation furnace has the following beneficial effects: the U-shaped channel design, the reasonable arrangement of the heating device, the first catalyst assembly and the second catalyst assembly, the uniform flow of the waste gas along the U-shaped channel during the heating and catalytic reaction process, the efficient and uniform heating of the gas, the full decomposition of the waste gas, the high catalytic oxidation efficiency, the good equipment sealing performance, the high heat utilization rate, and the solving of the technical problems of uneven gas treatment, high heat loss and short service life of the catalyst in the traditional catalytic oxidation equipment. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a perspective view of the catalytic oxidation furnace of the utility model;

[0022] Fig. 2 is a structural schematic view of the catalytic oxidation furnace of the utility model.

[0023] The reference signs are as follows: 1, furnace body; 11, shell frame; 12, outer wall plate; 13, insulation cotton; 2, U-shaped channel; 3, gas inlet; 4, gas outlet; 5, heating device; 6, first catalyst assembly; 7, second catalyst assembly; 8, first grid; 9, second grid; 10, aluminum silicate refractory fiber blanket. DETAILED DESCRIPTION

[0024] The application will be described in detail below with specific examples. The following examples will help those skilled in the art to further understand the application, but do not limit the application in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the application. These are within the scope of protection of the application.

[0025] As shown in Figs. 1-2 The utility model discloses a catalytic oxidation furnace, including: furnace body 1, the furnace body 1 has U type channel 2, the gas inlet 3 and the gas outlet 4 of U type channel 2 are at the top of furnace body 1, in U type channel 2, heating device 5, primary catalyst assembly 6 and secondary catalyst assembly 7 are sequentially arranged along the airflow direction. In this embodiment, the design of U type channel 2 is adopted, and heating device 5, primary catalyst assembly 6 and secondary catalyst assembly 7 are arranged reasonably, so that the waste gas can flow uniformly along the U type channel during heating and catalytic reaction, the purpose of high-efficiency and uniform heating of gas and full decomposition of waste gas is achieved, thereby realizing the technical effects of high catalytic oxidation efficiency, good equipment sealing and high heat utilization rate, and further solving the technical problems of uneven gas treatment, large heat loss and short service life of catalyst in traditional catalytic oxidation equipment.

[0026] The heating mode of the embodiment is three groups of electric heating devices 5, which are sequentially arranged in the heating section along the airflow direction, and are used for rapidly heating the high-concentration waste gas after being introduced into the furnace body 1 from the gas inlet 3, so as to provide suitable temperature conditions for the subsequent catalytic reaction; the purpose of the three groups of electric heating devices 5 in this embodiment is: to gradually heat the waste gas, so as to ensure that the waste gas reaches the required temperature range of catalytic reaction; the second purpose is: if one group of electric heating devices is damaged, it can be replaced alone, and the other two groups can continue to work, without affecting the equipment operation in the short term.

[0027] In this embodiment, the primary catalyst assembly 6 is fixedly connected to the first grid 8, the first grid 8 adopts a SUS304 grid with a specification of 100*100*50mm, the size of the grid is determined according to the internal size of the furnace body 1, and the first grid 8 is fully welded with the inner circumferential wall of the U type channel 2, so as to ensure the stability and sealing property of the primary catalyst assembly 6; similarly, the secondary catalyst assembly 7 is connected to the second grid 9, and the second grid 9 is also fixedly connected with the inner circumferential wall of the U type channel 2. The primary catalyst assembly 6 and the secondary catalyst assembly 7 are arranged and fixed reasonably, so as to ensure the efficiency and safety of the catalytic reaction.

[0028] Further, the primary catalyst assembly 6 and the secondary catalyst assembly 7 each include a blank carrier layer and three catalyst layers, and the blank carrier layer and the catalyst layers are sequentially stacked along the airflow direction. Specifically,

[0029] The lowermost of the primary catalyst assembly 6 and the secondary catalyst assembly 7 is arranged with a blank carrier, which functions to divide the gas flow to ensure sufficient contact of the gas flow with the catalyst; the three layers above the blank carrier are catalyst layers, which complete the preliminary reaction and further divide the gas flow.

[0030] In addition, the first stage catalyst assembly 6 can be expanded as needed, with 1-3 layers of catalyst added above it; the exhaust gas passes through the first stage catalyst and enters the secondary catalyst assembly 7 for complete decomposition reaction, and is finally discharged from the gas outlet 4.

[0031] The first stage catalyst assembly 6 and the secondary catalyst assembly 7 in the embodiment can be multiple, and only need to be installed equidistantly in the U-shaped channel 2.

[0032] In the embodiment, two thermocouples are arranged on the front side of the primary catalyst assembly 6 and the rear side of the secondary catalyst assembly 7 to monitor the temperature of the catalytic reaction in real time, and a total of four thermocouples are provided, the average of the readings of the front and rear thermocouples is taken, and the temperature difference before and after the catalyst is measured to confirm the health status of the catalyst.

[0033] The outer periphery of the primary catalyst assembly 6 and the secondary catalyst assembly 7 is filled with an aluminum silicate refractory fiber blanket 10 between the wall of the U-shaped channel 2, with a thickness of 10mm to 6mm, which not only functions to isolate the catalyst from direct contact with the furnace body 1, but also achieves good sealing effect.

[0034] In the embodiment, the furnace body 1 comprises a U-shaped air duct 2, a shell frame 11, an outer wall plate 12 connected to the outside of the shell frame 11, and thermal insulation cotton 13 filled in the shell frame 11; the wall plate of the U-shaped air duct 2 is made of SUS304 stainless steel plate with a thickness of 4mm; the shell frame 11 is made of carbon steel bending piece with a thickness of 3mm and is welded and fixed, the outer wall plate 12 is made of carbon steel folding plate with a thickness of 2mm and is connected to the outside of the shell frame 11 through bolts, and the thermal insulation cotton 13 is ceramic fiber cotton; the overall thickness is 200mm, which can effectively reduce heat loss and improve the heat utilization rate of the equipment.

[0035] Working principle: high concentration of organic waste gas enters the U-shaped channel 2 in the furnace body 1 through the gas inlet 3, and under the push of the gas flow, it first enters the heating section; three groups of electric heating devices 5 are installed in the heating section of the furnace body 1, which gradually heats the waste gas to ensure that it reaches the required temperature range for catalytic reaction; the heated waste gas enters the first-stage catalyst assembly 6, and if one group of electric heating devices is damaged, it can be replaced individually, and the other two groups can continue to work, which does not affect the operation of the equipment in the short term; the first-stage catalyst assembly 6 is composed of a blank carrier layer and a catalyst layer, the blank carrier layer divides the gas flow, and the catalyst layer promotes the preliminary oxidation reaction of organic pollutants in the waste gas; the intermediate products produced after the reaction and part of the unreacted substances enter the second-stage catalyst assembly 7 along with the gas flow, and the second-stage catalyst assembly 7 further oxidizes the waste gas. In this embodiment, the U-shaped channel 2 is designed, and the heating device 5, the first-stage catalyst assembly 6 and the second-stage catalyst assembly 7 are arranged reasonably, so that the waste gas can flow uniformly along the U-shaped channel during heating and catalytic reaction, achieving the purposes of efficient and uniform heating of the gas and full decomposition of the waste gas, thereby realizing the technical effects of high catalytic oxidation efficiency, good equipment sealing performance and high heat utilization rate, and further solving the technical problems of uneven gas treatment, large heat loss and short service life of the catalyst in the traditional catalytic oxidation equipment.

[0036] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0037] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A catalytic oxidation furnace, characterized by, The application relates to a furnace body (1) with a U-shaped channel (2) in the furnace body (1), an air inlet (3) and an air outlet (4) of the U-shaped channel (2) being located at the top of the furnace body (1). A heating device (5), a primary catalyst assembly (6) and a secondary catalyst assembly (7) are sequentially arranged in the U-shaped channel (2) along the air flow direction. The heating device (5) has three parts which are sequentially arranged in the U-shaped channel (2) along the air flow direction.

2. A catalytic oxidation furnace as claimed in claim 1, characterized in that The primary catalyst assembly (6) is connected to a first grid (8) which is connected to the inner wall of the U-shaped channel (2).

3. A catalytic oxidizer as set forth in claim 1 wherein, The secondary catalyst assembly (7) is connected to a second grid (9) which is connected to the inner wall of the U-shaped channel (2).

4. A catalytic oxidizer as set forth in claim 1 wherein, The primary catalyst assembly (6) and the secondary catalyst assembly (7) each comprise a blank carrier layer and three catalyst layers which are sequentially arranged along the air flow direction.

5. A catalytic oxidizer as set forth in claim 1 wherein, The front side of the primary catalyst assembly (6) and the back side of the secondary catalyst assembly (7) are respectively provided with thermocouples.

6. A catalytic oxidation furnace as claimed in claim 1, characterized in that The outer periphery of the primary catalyst assembly (6) and the secondary catalyst assembly (7) is filled with an aluminum silicate refractory fiber blanket (10) between the wall of the U-shaped channel (2).

7. A catalytic oxidation furnace as claimed in claim 1, characterized in that The furnace body (1) comprises a shell frame (11), an outer wall plate (12) connected to the shell frame (11) and heat insulation cotton (13) filled in the shell frame (11).

8. A catalytic oxidation furnace as claimed in claim 1, characterized in that ​

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