CN217763443U - Hazardous waste incineration secondary combustion chamber with sufficient combustion - Google Patents
Hazardous waste incineration secondary combustion chamber with sufficient combustion Download PDFInfo
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- CN217763443U CN217763443U CN202221049470.3U CN202221049470U CN217763443U CN 217763443 U CN217763443 U CN 217763443U CN 202221049470 U CN202221049470 U CN 202221049470U CN 217763443 U CN217763443 U CN 217763443U
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- air inlet
- inlet pipe
- secondary air
- pipe
- venturi section
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Abstract
The utility model provides a secondary combustion chamber for burning hazardous wastes fully, secondary air of the secondary combustion chamber enters an annular air box arranged outside a Venturi section through an air supply pipeline and then enters an inner cavity of the Venturi section through a secondary air inlet pipe; in the Venturi section, the direction of secondary air is downward 5 degrees to form downward annular air; the flue gas coming from the bottom of the secondary combustion chamber is mixed with secondary air and then fully disturbed in the secondary combustion chamber, and finally spirally rises to form turbulent flow, so that the combustion in the combustion section is more fully ensured.
Description
Technical Field
The utility model relates to a useless incineration technology field of danger specifically is a useless incineration second combustion chamber of danger of abundant burning.
Background
In the hazardous waste combustion treatment technology, the secondary combustion chamber generally comprises from top to bottom: the straight-tube-shaped combustion section, the Venturi section and the ash bucket section, and the smoke needing secondary combustion vertically goes upward to the combustion section from the ash bucket section. In order to achieve sufficient combustion of the flue gas, it is necessary to maintain the combustion temperature >1100 ℃ and the flue gas residence time > 2.0s in the secondary combustion chamber with sufficient excess oxygen, while ensuring that the flue gas is sufficiently turbulent. In the prior art, disturbance to flue gas is usually realized by secondary air, however, disturbance which can be provided by the existing secondary air from bottom to top is not enough, and then a combustor or other modes are required to be added to realize disturbance to flue gas, so that the overall construction cost of the system is increased.
Disclosure of Invention
The disturbance that can provide in order to solve current overgrate air from bottom to top is not enough, needs to increase other equipment, has increased the problem of system running cost, the utility model provides a two combustion chambers are burnt to danger of abundant burning useless, and it can be better more abundant satisfy the flue gas dwell time and the disturbance burning that burn burning furnace, simple structure, low cost simultaneously.
The utility model discloses a structure is like this: a fully-burning dangerous waste incineration secondary combustion chamber comprises: arranged from top to bottom: the burning section, venturi section, the ash bucket section of straight tube-shape, its characterized in that, it still includes: annular bellows, secondary air inlet pipe;
the annular air box communicated with the secondary air supply device is arranged concentrically and annularly with the Venturi section along the periphery of the Venturi section; one end of the secondary air inlet pipe is communicated with the annular air box, the other end of the secondary air inlet pipe penetrates through the wall of the venturi section from outside to inside, and an opening is formed in the inner wall of the venturi section;
in the vertical direction, the included angle between the axis of the secondary air inlet pipe and the horizontal line is set to be 5 degrees; in the horizontal direction, secondary air enters the inner cavity of the venturi section along the secondary air inlet pipe in the direction of 45-degree tangent.
It is further characterized in that:
the two ends of the branch pipe air inlet pipe are respectively communicated with the secondary air inlet pipe and the annular air box, so that position adjustment in the vertical direction is provided for the secondary air inlet pipe; the anti-blocking hand-drawing pipe is arranged between the secondary air inlet pipe and the branch pipe air inlet pipe and provides position adjustment in the horizontal direction for the secondary air inlet pipe; one end of the anti-blocking hand-digging pipe is communicated with the secondary air inlet pipe, and the other end of the anti-blocking hand-digging pipe is provided with an anti-blocking hand-digging hole and is sealed by a sealing device; one end of the branch pipe air inlet pipe is communicated with the annular air box, and the other end of the branch pipe air inlet pipe is communicated with the pipe body of the anti-blocking hand-drawing pipe;
the protective sleeve is sleeved on the outer circumference of the secondary air inlet pipe and arranged at the position, located in the wall of the venturi section, of the secondary air inlet pipe;
when the secondary air inlet pipe is installed, the included angle between the axis of the first secondary air inlet pipe and the normal line of the point where the first secondary air inlet pipe is located is set to be 20 degrees; the other secondary air inlet pipes are arranged along the tangential direction of 45 degrees in sequence.
The utility model provides a secondary air of a fully-combusted secondary combustion chamber for burning hazardous wastes, which enters an annular air box arranged outside a Venturi section through an air supply pipeline and then enters an inner cavity of the Venturi section through a secondary air inlet pipe; inside the venturi section, the direction of secondary air is downward 5 degrees to form downward annular air; the flue gas coming from the bottom of the secondary combustion chamber is mixed with secondary air and then fully disturbed in the secondary combustion chamber, and finally spirally rises to form turbulent flow, so that the combustion in the combustion section is more fully ensured.
Drawings
Fig. 1 is a schematic structural view of a second combustion chamber of the present invention;
FIG. 2 is a schematic view of the construction of an annular windbox and secondary air inlet duct;
fig. 3 isbase:Sub>A sectional view of the annular bellows and the overfire air inlet duct in the direction ofbase:Sub>A-base:Sub>A in fig. 2.
Detailed Description
As shown in fig. 1, the utility model discloses a two combustion chambers are burned to useless danger of abundant burning, it includes: the following components are arranged from top to bottom: a straight-tube-shaped combustion section 1, a Venturi section 2, an ash bucket section 3, an annular air box 4 and a secondary air inlet pipe 5.
The annular air box 4 communicated with the secondary air supply device is arranged concentrically and annularly with the Venturi section 2 along the periphery of the Venturi section 2; one end of the secondary air inlet pipe 5 is communicated with the annular air box 4, the other end of the secondary air inlet pipe penetrates through the wall of the Venturi section 2 from outside to inside, and the opening is formed in the inner wall of the Venturi section 2. In order to avoid radiation and overheating of the outer shell of the secondary combustion chamber, the latter is designed as a cylindrical cylinder consisting of steel plates and refractory material. The secondary air inlet pipe 5 and the venturi section 2 are fixed in a welding mode.
As shown in fig. 2, in the vertical direction, the included angle between the axis of the secondary air inlet pipe 5 and the horizontal line is set to be 5 degrees; in the horizontal direction, the secondary air enters the inner cavity of the venturi section 2 along the secondary air inlet pipe 5 in the tangential direction of 45 degrees. When the secondary air inlet pipe 5 is installed, the included angle between the axis of the first secondary air inlet pipe 5 and the normal line of the point where the axis is located is set to be 20 degrees; the rest secondary air inlet pipes 5 are sequentially arranged in the tangential direction with the axis at 45 degrees.
As shown in figure 3, the second combustion chamber also comprises a branch air inlet pipe 6, an anti-blocking manual digging pipe 7 and a protective sleeve 9. Two ends of a branch air inlet pipe 6 are respectively communicated with a secondary air inlet pipe 5 and an annular air box 4, and position adjustment in the vertical direction is provided for the secondary air inlet pipe 5; the anti-blocking hand-drawing pipe 7 is arranged between the secondary air inlet pipe 5 and the branch pipe air inlet pipe 6 and provides position adjustment in the horizontal direction for the secondary air inlet pipe 5; one end of the anti-blocking hand-digging pipe 7 is communicated with the secondary air inlet pipe 5, the other end of the anti-blocking hand-digging pipe is provided with an anti-blocking hand-digging hole 8, the anti-blocking hand-digging hole 8 is sealed through a sealing device, once the secondary air inlet pipe 5 is blocked accidentally in use, the anti-blocking hand-digging hole 8 is used for dredging, and the equipment maintenance flow is simplified; one end of the branch air inlet pipe 6 is communicated with the annular air box 4, and the other end of the branch air inlet pipe is communicated with the pipe body of the anti-blocking hand-drawing pipe 7, secondary air entering from the annular air box 4 passes through the branch air inlet pipe 6, the anti-blocking hand-drawing pipe 7 and the secondary air inlet pipe 5 in sequence, and is sprayed into the venturi section 2 from the opening end of the secondary air inlet pipe 5 in the inner cavity of the venturi section 2.
The protective sleeve 9 is sleeved on the outer circumference of the secondary air inlet pipe 5 and is arranged at the position, located in the wall of the venturi section 2, of the secondary air inlet pipe 5 to protect the secondary air inlet pipe 5 and prolong the service life of equipment.
When the annular air box is specifically applied, the venturi section 2 is provided with the reinforcing rib plate 10, and the integral structural strength of the equipment is ensured after the annular air box 4 is added. Specifically, as shown in fig. 2, the reinforcing rib plates 10 are arranged in a staggered manner with respect to the secondary air inlet pipe 5.
Use the technical scheme of the utility model afterwards, the overgrate air of two combustion chambers passes through air supply pipe and gets into annular bellows 4 of venturi section 2, then through branch pipe air-supply line 6, prevent stifled hand and draw pipe 7, secondary air-supply line 5 get into two combustion chambers inside, arrange on venturi section 2's circumference with venturi welded secondary air-supply line 5 even partition ring shape, the wind speed scope of overgrate air is: 30-50m/s, and the direction is 5 degrees downwards, so that a downward annular wind is formed. The flue gas coming from the bottom of the secondary combustion chamber is mixed with secondary air and then fully disturbed in the furnace, and finally spirally rises to form turbulent flow, so that the residence time of the flue gas in the secondary combustion chamber is ensured to be more than 2s at 1100 ℃, the combustion is ensured to be more full, and the requirements of GB 18484-2020 hazardous waste incineration pollution control standard are met.
Claims (4)
1. A fully-combusted hazardous waste incineration secondary combustion chamber comprises: the following components are arranged from top to bottom: the burning section, venturi section, the ash bucket section of straight tube-shape, its characterized in that, it still includes: an annular air box and a secondary air inlet pipe;
the annular air box communicated with the secondary air supply device is arranged concentrically and annularly with the venturi section along the periphery of the venturi section; one end of the secondary air inlet pipe is communicated with the annular air box, the other end of the secondary air inlet pipe penetrates through the wall of the venturi section from outside to inside, and an opening is formed in the inner wall of the venturi section;
in the vertical direction, the included angle between the axis of the secondary air inlet pipe and the horizontal line is set to be 5 degrees; in the horizontal direction, secondary air enters the inner cavity of the venturi section along the secondary air inlet pipe in the direction of 45-degree tangent.
2. The fully-combusted hazardous waste incineration secondary combustion chamber as claimed in claim 1, characterized in that: the device also comprises a branch pipe air inlet pipe and an anti-blocking hand-drawing pipe, wherein two ends of the branch pipe air inlet pipe are respectively communicated with the secondary air inlet pipe and the annular air box, so that the position adjustment in the vertical direction is provided for the secondary air inlet pipe; the anti-blocking hand-drawing pipe is arranged between the secondary air inlet pipe and the branch pipe air inlet pipe and provides position adjustment in the horizontal direction for the secondary air inlet pipe; one end of the anti-blocking hand digging pipe is communicated with the secondary air inlet pipe, and the other end of the anti-blocking hand digging pipe is provided with an anti-blocking hand digging hole and is sealed through a sealing device; one end of the branch pipe air inlet pipe is communicated with the annular air box, and the other end of the branch pipe air inlet pipe is communicated with the pipe body of the anti-blocking hand-drawing pipe.
3. The fully-combusted hazardous waste incineration secondary combustion chamber as claimed in claim 1, characterized in that: the protective sleeve is sleeved on the outer circumference of the secondary air inlet pipe and is arranged at the position, located in the wall of the Venturi section, of the secondary air inlet pipe.
4. The fully-combusted hazardous waste incineration secondary combustion chamber as claimed in claim 1, characterized in that: when the secondary air inlet pipe is installed, the included angle between the axis of the first secondary air inlet pipe and the normal line of the point where the first secondary air inlet pipe is located is set to be 20 degrees; the other secondary air inlet pipes are arranged along the 45-degree tangential direction in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221049470.3U CN217763443U (en) | 2022-05-05 | 2022-05-05 | Hazardous waste incineration secondary combustion chamber with sufficient combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221049470.3U CN217763443U (en) | 2022-05-05 | 2022-05-05 | Hazardous waste incineration secondary combustion chamber with sufficient combustion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217763443U true CN217763443U (en) | 2022-11-08 |
Family
ID=83884419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221049470.3U Active CN217763443U (en) | 2022-05-05 | 2022-05-05 | Hazardous waste incineration secondary combustion chamber with sufficient combustion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217763443U (en) |
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2022
- 2022-05-05 CN CN202221049470.3U patent/CN217763443U/en active Active
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