CN211274226U

CN211274226U - Device for removing dioxin through catalytic oxidation

Info

Publication number: CN211274226U
Application number: CN201922046291.9U
Authority: CN
Inventors: 朱昊成; 邓立锋; 黄友华; 宫锐
Original assignee: Longking Coalogix Environmental Protection Technology Shanghai Co ltd
Current assignee: Longking Coalogix Environmental Protection Technology Shanghai Co ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-08-18
Anticipated expiration: 2029-11-25

Abstract

The utility model discloses a device for removing dioxin through catalytic oxidation, which comprises a reactor, an inlet flue, an outlet flue, an ozone generator, an ozone conveying pipe and an ozone injection device; the one end of entry flue is connected with the entry of reactor, the one end of export flue is connected with the export of reactor, be equipped with rectification layer and catalyst layer in the reactor, rectification layer and catalyst layer arrange along flue gas flow direction in proper order, ozone injection apparatus sets up the inside at the entry flue, the one end of ozone conveyer pipe is connected with ozone generator, and the other end of this ozone conveyer pipe runs through the entry flue and is connected with ozone injection apparatus, be equipped with the governing valve on the ozone conveyer pipe. The utility model relates to a device of catalytic oxidation desorption dioxin, its is rational in infrastructure, through throwing ozone to the flue gas in, the oxidation takes place for the dioxin in ozone and the flue gas, and the rethread catalyst layer reaches purifying effect with the dioxin desorption.

Description

Device for removing dioxin through catalytic oxidation

Technical Field

The utility model relates to a device of catalytic oxidation desorption dioxin.

Background

Dioxin is a chlorine-containing strong toxic organic chemical substance synthesized chemically, is one of the most feared chemical substances manufactured by human beings at present, and the emission reduction of dioxin is always a hot problem of research in the global scope. In the pollutants discharged in the steel industry, 90% of dioxin comes from the sintering process, so that the dioxin treatment of the sintering flue gas is particularly critical. According to the research of the heat energy engineering system of Qinghua university, namely Qianyuan Ji et al (the production condition and control strategy of dioxin in garbage incineration), the dioxin control process comprises three stages of an initial generation stage, a pyrolysis stage and a later synthesis stage, wherein the generation amount of dioxin can be reduced by rapid cooling, and the generated dioxin can be treated in a small amount by activated carbon sprayed in dry deacidification, but from the practical situation, the emission concentration of the dioxin is still worried, although the emission concentration of the dioxin can reach the standard of 0.5ng/m3 of the hazardous waste incineration pollution control standard (GB18484-2011), the emission concentration of the nitrogen oxide in the hazardous waste incineration pollution control standard (GB18484-2014) is more and more than 400 mg/3, and the emission concentration of the dioxin is less than or equal to 0.1ng/m3 along with the increasing requirements of tail gas emission. Therefore, the design of a device for removing dioxin through catalytic oxidation is significant.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a device of catalytic oxidation desorption dioxin, its is rational in infrastructure, through throwing ozone to the flue gas in, the oxidation takes place for the dioxin in ozone and the flue gas, and the rethread catalyst layer reaches purifying effect with the dioxin desorption.

In order to realize the purpose, the technical proposal of the utility model is to design a device for removing dioxin by catalytic oxidation, which comprises a reactor, an inlet flue, an outlet flue, an ozone generator, an ozone conveying pipe and an ozone injection device; the one end of entry flue is connected with the entry of reactor, the one end of export flue is connected with the export of reactor, be equipped with rectification layer and catalyst layer in the reactor, rectification layer and catalyst layer arrange along flue gas flow direction in proper order, ozone injection apparatus sets up the inside at the entry flue, the one end of ozone conveyer pipe is connected with ozone generator, and the other end of this ozone conveyer pipe runs through the entry flue and is connected with ozone injection apparatus, be equipped with the governing valve on the ozone conveyer pipe.

Preferably, the ozone injection device comprises a conveying main pipe and a plurality of conveying branch pipes, the conveying main pipe is connected with the ozone conveying pipe, the conveying branch pipes are respectively connected with the conveying main pipe, and each conveying branch pipe is provided with a plurality of injectors.

Preferably, the plurality of injectors are arranged at equal intervals along the length of the delivery manifold.

Preferably, the ejector comprises a disc-shaped body and a connecting pipe, a cavity is arranged in the disc-shaped body, a plurality of injection holes communicated with the cavity are formed in the disc surface of the disc-shaped body, one end of the connecting pipe is connected with the conveying branch pipe, and the other end of the connecting pipe is communicated with the cavity of the disc-shaped body.

Preferably, the plurality of ejection openings are uniformly arranged in the circumferential direction of the disc-shaped body.

Preferably, the catalyst layer is provided with four layers, and the catalyst layer has a honeycomb structure.

The utility model has the advantages and the beneficial effects that: the device for removing the dioxin through catalytic oxidation is reasonable in structure, ozone and the dioxin in the flue gas are oxidized by adding the ozone into the flue gas, and then the dioxin is removed through the catalyst layer to achieve a purifying effect. During operation, ozone generated by the ozone generator is conveyed to the conveying main pipe of the ozone injection device through the ozone conveying pipe and then conveyed to each conveying branch pipe through the conveying main pipe, the conveying branch pipes convey the ozone into the disc-shaped body and spray the ozone through the spray holes, the ozone is mixed with flue gas in the inlet flue and then enters the reactor, and dioxin in the flue gas is removed through catalytic oxidation of the catalyst layer and finally discharged through the outlet flue.

Drawings

Fig. 1 is a schematic diagram of the present invention.

Figure 2 is a schematic diagram of the ozone injection device of the present invention.

Fig. 3 is a schematic diagram of the ejector of the present invention.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

The utility model discloses the technical scheme who specifically implements is:

as shown in fig. 1, fig. 2 and fig. 3, a device for removing dioxin by catalytic oxidation comprises a reactor 1, an inlet flue 2, an outlet flue 3, an ozone generator 4, an ozone conveying pipe 5 and an ozone injection device 6; the one end of entry flue 2 is connected with the entry of reactor 1, the one end of export flue 3 is connected with the export of reactor 1, be equipped with rectification layer 7 and catalyst layer 8 in the reactor 1, rectification layer 7 and catalyst layer 8 are arranged along flue gas flow direction in proper order, ozone injection apparatus 6 sets up the inside at entry flue 2, the one end of ozone conveyer pipe 5 is connected with ozone generator 4, and the other end of this ozone conveyer pipe 5 runs through the entry flue and is connected with ozone injection apparatus 6, be equipped with governing valve 9 on the ozone conveyer pipe 5.

The ozone injection device 6 comprises a conveying main pipe 61 and a plurality of conveying branch pipes 62, wherein the conveying main pipe 61 is connected with the ozone conveying pipe 5, the plurality of conveying branch pipes 62 are respectively connected with the conveying main pipe 61, and each conveying branch pipe 62 is provided with a plurality of injectors 10.

The above-mentioned several injectors 10 are arranged at equal intervals along the length direction of the delivery manifold 62.

The injector 10 includes a disk-shaped body 101 and a connecting pipe 102, wherein a cavity 103 is formed in the disk-shaped body 101, a plurality of injection holes 104 communicated with the cavity 103 are formed in the disk surface of the disk-shaped body 101, one end of the connecting pipe 102 is connected to the delivery branch pipe 62, and the other end of the connecting pipe 102 is communicated with the cavity 103 of the disk-shaped body 101.

The plurality of ejection openings 104 are uniformly arranged in the circumferential direction of the disc-shaped body 101.

The catalyst layer 8 is provided with four layers, and the catalyst layer 8 has a honeycomb structure.

The utility model has the advantages and the beneficial effects that: the device for removing the dioxin through catalytic oxidation is reasonable in structure, ozone and the dioxin in the flue gas are oxidized by adding the ozone into the flue gas, and then the dioxin is removed through the catalyst layer 8 to achieve a purifying effect. During operation, ozone generated by the ozone generator 4 is conveyed to the conveying main pipe 61 of the ozone injection device 6 through the ozone conveying pipe 5, then conveyed to each conveying branch pipe 62 through the conveying main pipe 61, the conveying branch pipes 62 convey the ozone into the disc-shaped body 101 and spray the ozone through the spray holes 104, so that the ozone is mixed with flue gas in the inlet flue 2 and then enters the reactor 1, dioxin in the flue gas is removed through catalytic oxidation of the catalyst layer 8, and finally the ozone is discharged through the outlet flue 3.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A device for removing dioxin through catalytic oxidation is characterized by comprising a reactor, an inlet flue, an outlet flue, an ozone generator, an ozone conveying pipe and an ozone injection device; the one end of entry flue is connected with the entry of reactor, the one end of export flue is connected with the export of reactor, be equipped with rectification layer and catalyst layer in the reactor, rectification layer and catalyst layer arrange along flue gas flow direction in proper order, ozone injection apparatus sets up the inside at the entry flue, the one end of ozone conveyer pipe is connected with ozone generator, and the other end of this ozone conveyer pipe runs through the entry flue and is connected with ozone injection apparatus, be equipped with the governing valve on the ozone conveyer pipe.

2. The apparatus for removing dioxin through catalytic oxidation according to claim 1, wherein the ozone injection device comprises a main conveying pipe and a plurality of branch conveying pipes, the main conveying pipe is connected with the ozone conveying pipe, the branch conveying pipes are respectively connected with the main conveying pipe, and a plurality of injectors are arranged on each branch conveying pipe.

3. The apparatus for catalytic oxidative dioxin removal according to claim 2, wherein the plurality of injectors are arranged at equal intervals in the length direction of the delivery manifold.

4. The apparatus for removing dioxin through catalytic oxidation according to claim 3, wherein the ejector comprises a disk-shaped body having a cavity inside and a plurality of injection holes on the disk surface of the disk-shaped body in communication with the cavity, and a connection pipe having one end connected to the delivery branch pipe and the other end connected to the cavity of the disk-shaped body.

5. The device for catalytic oxidation dioxin removal according to claim 4, characterized in that the plurality of injection ports are arranged uniformly in the circumferential direction of the disk-like body.

6. The apparatus for catalytic oxidation removal of dioxins as claimed in claim 5, wherein the catalyst layer is provided with four layers and the catalyst layer is of a honeycomb structure.