CN210448674U

CN210448674U - Tail gas pyrolysis device

Info

Publication number: CN210448674U
Application number: CN201920955884.4U
Authority: CN
Inventors: 庞云玲
Original assignee: Dongtai Hi Tech Equipment Technology Co Ltd
Current assignee: Zishi Energy Co.,Ltd.
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-05-05
Anticipated expiration: 2029-06-24

Abstract

The utility model relates to a tail gas pyrolysis device, include: one end of the outer sleeve is provided with a first air inlet, and the other end of the outer sleeve is provided with an extension port; the heating layer is arranged on the periphery of the outer sleeve; the first inner sleeve is arranged in the outer sleeve, and the second air inlet is arranged towards the extension opening; and one end of the second inner sleeve is provided with a third air inlet, the other end of the second inner sleeve is provided with an air outlet, the second inner sleeve is arranged in the first inner sleeve, the third air inlet is arranged towards the closed end of the first inner sleeve, and the air outlet penetrates through the second air inlet and extends out of the outer sleeve. The utility model provides a tail gas pyrolysis device can carry out the pyrolysis to the tail gas that contains arsine to through the structure setting of outer sleeve, first inner skleeve and second inner skleeve, can prolong the circulation route of tail gas, make arsine in the tail gas can abundant pyrolysis, strengthened pyrolysis device's pyrolysis effect.

Description

Tail gas pyrolysis device

Technical Field

The utility model relates to an exhaust-gas treatment technical field especially relates to a tail gas pyrolysis device.

Background

Industrial emissions of gaseous pollutants are a major source of atmospheric environmental pollutants, with arsine being one of the gaseous pollutants that has a serious environmental hazard. Arsine (chemical formula: AsH3), also called arsine, arsine and arsine, is the simplest arsenic compound, is a colorless and extremely toxic gas with a density higher than that of air, and is soluble in water and various organic solvents. As arsenic hydride is a highly toxic substance and is extremely difficult to eliminate toxicity, the tail gas of smelting contains arsenic hydride which is regulated by the electronic industry gas standard GB/T26250-.

The prior art provides some tail gas pyrolysis devices, and these tail gas pyrolysis devices have a common defect that the circulation path of tail gas in the pyrolysis device is short, and the sufficient pyrolysis of arsine in the tail gas cannot be achieved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tail gas pyrolysis device to solve the insufficient technical problem of tail gas pyrolysis that exists among the prior art.

To achieve the purpose, the utility model adopts the following technical proposal:

an exhaust pyrolysis apparatus comprising:

the first end of the outer sleeve is provided with a first air inlet, and the second end of the outer sleeve is provided with an extension port;

a heating layer disposed at an outer periphery of the outer sleeve;

and a plurality of inner sleeves provided inside the outer sleeve and forming a flow path having a plurality of recirculation times.

As a preferred embodiment of the tail gas pyrolysis device, the plurality of inner sleeves include:

the first inner sleeve is provided with a second air inlet at a first end, the second end is a closed end, the first inner sleeve is arranged in the outer sleeve, and the second air inlet is arranged towards the second end of the outer sleeve;

the second inner skleeve, its first end is provided with the third air inlet, and the second end is provided with the gas vent, the second inner skleeve set up in the first inner skleeve, just the orientation of third air inlet the blind end setting of first inner skleeve, the gas vent passes the second air inlet with stretch out mouthful extremely outside the outer skleeve, the second inner skleeve with the outer skleeve in stretch out exit sealing connection.

As the preferred technical scheme of tail gas pyrolysis device, the tail gas pyrolysis device still includes the heat preservation, the heat preservation set up in the periphery of zone of heating.

As a preferable technical solution of the tail gas pyrolysis device, the outer sleeve and the second inner sleeve are provided with a sealing member at the protruding port.

As the preferable technical scheme of the tail gas pyrolysis device, the sealing element is a sealing ring or a sealing glue.

As a preferable technical scheme of the tail gas pyrolysis device, the outer walls of the first inner sleeve and the second inner sleeve are both provided with heat exchange fins.

As the preferred technical scheme of tail gas pyrolysis device, the zone of heating has towards the first end of first air inlet and towards the second end of the blind end of outer sleeve, first end with the blind end parallel and level of first inner sleeve or cover the blind end of first inner sleeve, the second end with first inner sleeve sets up the one end parallel and level of second air inlet or cover first inner sleeve sets up the one end of second air inlet.

As the preferable technical scheme of the tail gas pyrolysis device, the heating layer is completely coated by the heat preservation layer.

As the preferred technical scheme of the tail gas pyrolysis device, the heating layer is an electric heating pipe wound on the periphery of the outer sleeve.

As the preferable technical scheme of the tail gas pyrolysis device, the heat-insulating layer is made of an organic heat-insulating material.

The utility model has the advantages that:

the tail gas pyrolysis device provided by the utility model can pyrolyze the tail gas containing arsenic hydride, so that the arsenic hydride in the tail gas is decomposed into gaseous arsenic and hydrogen, thereby meeting the requirements of recovery and discharge; in addition, through the structural arrangement of the outer sleeve, the first inner sleeve and the second inner sleeve, the circulation path of the tail gas can be prolonged, the arsine in the tail gas can be fully pyrolyzed, and the pyrolysis effect of the pyrolysis device is enhanced.

Drawings

FIG. 1 is a schematic structural diagram of the tail gas pyrolysis device of the present invention;

fig. 2 is a sectional view taken in the direction of a-a in fig. 1.

In the figure:

10-a heat-insulating layer; 20-heating layer; 30-an outer sleeve; 31-a first air inlet; 40-a first inner sleeve; 41-a second air inlet; 42-first heat exchange fins; 50-a second inner sleeve; 51-a third air inlet; 52-exhaust port; 53-second heat exchange fins.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 and 2, the present invention provides an exhaust pyrolysis device, comprising an outer sleeve 30, a heating layer 20, a first inner sleeve 40 and a second inner sleeve 50, wherein a first end of the outer sleeve 30 is provided with a first air inlet 31, and a second end is provided with an outlet; the heating layer 20 is arranged on the periphery of the outer sleeve 30; the first end of the first inner sleeve 40 is provided with a second air inlet 41, the second end is a closed end, the first inner sleeve 40 is arranged in the outer sleeve 30, the second air inlet 41 faces the second end of the outer sleeve 30, and the closed end faces the first end of the outer sleeve 30; the first end of the second inner sleeve 50 is provided with a third air inlet 51, the second end is provided with an air outlet 52, the second inner sleeve 50 is arranged in the first inner sleeve 40, the third air inlet 51 faces the closed end of the first inner sleeve 40, the air outlet 52 passes through the second air inlet 41 and the extension opening to the outside of the outer sleeve 30, and the second inner sleeve 50 is hermetically connected with the outer sleeve 30 at the extension opening to avoid the leakage of the tail gas in the outer sleeve 30. Preferably, the outer sleeve 30 and the second inner sleeve 50 are provided with seals at the protruding openings. Optionally, the sealing member is a sealing ring or sealant.

The tail gas containing the arsenic hydride firstly enters the pyrolysis device through the first gas inlet 31 and flows to the second gas inlet 41 from the space between the outer wall of the outer sleeve 30 and the inner wall of the first inner sleeve 40, and a certain distance is reserved between the first end of the first inner sleeve 40 and the second end of the outer sleeve 30, so that a backflow space is formed between the first end and the second end of the outer sleeve 30, and the gas flows back stably; then enters the first inner sleeve 40 through the second air inlet 41 and is communicated to the third air inlet 51 from the space between the outer wall of the first inner sleeve 40 and the inner wall of the second inner sleeve 50; finally, the air enters the second inner sleeve 50 through the third air inlet 51 and flows along the second inner sleeve 50 to the air outlet 52. The heating layer 20 can heat the temperature inside the outer sleeve 30 to 600 degrees or higher, the arsine-containing tail gas is heated during the circulation process, the arsine is decomposed into arsenic and hydrogen, and the decomposed gas is discharged from the exhaust port 52. To ensure adequate pyrolysis of the exhaust gases, the lengths of the outer sleeve 30, the first inner sleeve 40, and the second inner sleeve 50 should be long enough, for example, for a gas flow of 1400slm, the lengths of the outer sleeve 30, the first inner sleeve 40, and the second inner sleeve 50 are no less than 800 mm. In the present embodiment, the diameter of the outer sleeve 30 is 400mm, the diameter of the first inner sleeve 40 is 300mm, the diameter of the second inner sleeve 50 is 150mm, and the material of the outer sleeve 30, the first inner sleeve 40 and the second inner sleeve 50 is stainless steel 310 s. Of course, the above is merely exemplary, and the diameters and materials of the outer sleeve 30, the first inner sleeve 40, and the second inner sleeve 50 are not limited thereto.

In this embodiment, the number of the inner sleeves is two, and the number of the gas reflowing times is two, it can be understood that, in other embodiments, in order to extend the gas flowing path, the number of the inner sleeves may be increased to increase the number of the gas reflowing times, but it should be noted that, increasing the number of the gas reflowing times needs to consider the gas pressure, and the flowing speed of the gas in the flowing path needs to be ensured.

The tail gas pyrolysis device provided by the utility model can pyrolyze the arsenic hydride, so that the arsenic hydride in the tail gas is decomposed into gaseous arsenic and hydrogen, and the recycling and discharging requirements are met; in addition, by the structural arrangement of the outer sleeve 30, the first inner sleeve 40 and the second inner sleeve 50, a long circulation path of the tail gas can be obtained in the same length range, so that the hydrogen arsenide in the tail gas can be fully pyrolyzed, and the pyrolysis effect of the pyrolysis device is enhanced.

In this embodiment, heating layer 20 has a first end facing first air inlet 31 and a second end facing the closed end of outer sleeve 30, the first end being flush with or covering the closed end of first inner sleeve 40, and the second end being flush with or covering the end of first inner sleeve 40 where second air inlet 41 is located or the end of first inner sleeve 40 where second air inlet 41 is located. Through above-mentioned structural setting, can zone of heating 20 cover the circulation route of tail gas completely, further guarantee that tail gas is fully pyrolyzed at the circulation in-process. In the present embodiment, the heating layer 20 is an electric heating tube disposed around the outer circumference of the outer sleeve 30, but is not limited thereto.

Further, the utility model discloses a tail gas pyrolysis device still includes heat preservation 10, and heat preservation 10 sets up in the periphery of zone of heating 20, keeps warm to the pyrolysis device. Furthermore, the insulating layer 10 completely covers the heating layer 20 to better insulate the pyrolysis device. In this embodiment, the insulating layer 10 is made of an organic insulating material, and the organic insulating material has the characteristics of light weight, high compactness, and good heat insulating property, but the material of the insulating layer 10 is not limited thereto.

In addition, the outer wall of the first inner sleeve 40 is provided with first heat exchange fins 42, and the outer wall of the second inner sleeve 50 is provided with second heat exchange fins 53.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An exhaust pyrolysis apparatus, comprising:

an outer sleeve (30) having a first end provided with a first air inlet (31) and a second end provided with an extension opening;

a heating layer (20) provided on the outer periphery of the outer sleeve (30);

and a plurality of inner sleeves provided inside the outer sleeve (30) and forming a flow path having a plurality of recirculation times.

2. The exhaust pyrolysis device of claim 1 wherein the plurality of inner sleeves comprise:

a first inner sleeve (40) having a first end provided with a second air inlet (41) and a second end being a closed end, the first inner sleeve (40) being disposed within the outer sleeve (30) and the second air inlet (41) being disposed towards the second end of the outer sleeve (30);

second inner skleeve (50), its first end is provided with third air inlet (51), and the second end is provided with gas vent (52), second inner skleeve (50) set up in first inner skleeve (40), just third air inlet (51) orientation the blind end setting of first inner skleeve (40), gas vent (52) pass second air inlet (41) with stretch out mouthful extremely outside outer skleeve (30), second inner skleeve (50) with outer skleeve (30) in stretch out exit sealing connection.

3. The exhaust gas pyrolysis device according to claim 1, further comprising an insulation layer (10), wherein the insulation layer (10) is disposed at an outer periphery of the heating layer (20).

4. The exhaust pyrolysis device of claim 2, wherein the outer sleeve (30) and the second inner sleeve (50) are provided with seals at the outlet.

5. The exhaust pyrolysis device of claim 4, wherein the sealing element is a sealing ring or sealant.

6. The exhaust gas pyrolysis device of claim 2, characterized in that the outer walls of the first inner sleeve (40) and the second inner sleeve (50) are each provided with heat exchange fins.

7. The exhaust pyrolysis device of claim 2, wherein the heating layer (20) has a first end facing the first air inlet (31) and a second end facing the closed end of the outer sleeve (30), the first end being flush with or covering the closed end of the first inner sleeve (40), the second end being flush with or covering the end of the first inner sleeve (40) where the second air inlet (41) is located or the end of the first inner sleeve (40) where the second air inlet (41) is located.

8. The exhaust pyrolysis device of claim 3, wherein the insulating layer (10) completely covers the heating layer (20).

9. The exhaust pyrolysis device of claim 1, wherein the heating layer (20) is an electric heating tube arranged around the outer circumference of the outer sleeve (30).

10. The tail gas pyrolysis device according to claim 3, characterized in that the insulating layer (10) is made of an organic insulating material.