CN219810270U - Furnace wall and solid waste gas melting furnace - Google Patents
Furnace wall and solid waste gas melting furnace Download PDFInfo
- Publication number
- CN219810270U CN219810270U CN202320082326.8U CN202320082326U CN219810270U CN 219810270 U CN219810270 U CN 219810270U CN 202320082326 U CN202320082326 U CN 202320082326U CN 219810270 U CN219810270 U CN 219810270U
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- China
- Prior art keywords
- furnace
- furnace wall
- resistant layer
- slag
- heat
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- 239000007789 gas Substances 0.000 title claims abstract description 25
- 238000002844 melting Methods 0.000 title claims abstract description 22
- 230000008018 melting Effects 0.000 title claims abstract description 22
- 239000002910 solid waste Substances 0.000 title claims abstract description 16
- 239000002893 slag Substances 0.000 claims abstract description 38
- 238000001816 cooling Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000007790 solid phase Substances 0.000 claims abstract description 14
- 238000002309 gasification Methods 0.000 claims abstract description 11
- 239000012071 phase Substances 0.000 claims abstract description 11
- 239000002826 coolant Substances 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims 1
- 239000011819 refractory material Substances 0.000 abstract description 17
- 239000007787 solid Substances 0.000 description 7
- 210000000078 claw Anatomy 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000003779 heat-resistant material Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Gasification And Melting Of Waste (AREA)
Abstract
The utility model discloses a furnace wall and a solid waste gas melting furnace, wherein the furnace wall structure comprises an inner heat-resistant layer, a cooling structure layer, an outer heat-resistant layer and a shell which are sequentially arranged from inside to outside of the furnace. The disclosed solid waste gasification melting furnace comprises a furnace body, wherein a material inlet and a gas outlet are formed in the axial top of the furnace body, and a gas phase zone, a solid phase zone and a slag zone are sequentially formed in the furnace body from the axial top to the bottom; wherein the walls of the solid phase zone and the slag zone employ the wall structure of the present utility model. The furnace wall is of a water-cooling furnace wall structure, the water-cooling furnace wall is adopted to replace a hot fireplace mode when a pure refractory material is built, slag can be formed on the surface of the water-cooling wall, so that the slag becomes another type of refractory material, slag-in-slag resistance is realized, and the loss speed of the refractory material is reduced.
Description
Technical Field
The utility model belongs to the technical field of solid dangerous waste treatment, and relates to a furnace wall structure for a solid waste melting furnace.
Background
Slag, fly ash, household garbage incineration fly ash and other solid dangerous wastes generated by the rotary kiln system can be melted at a high temperature of more than 1400 ℃ through a solid waste melting furnace to form vitrified slag with stable structure, thereby replacing traditional means such as landfill and the like to recycle resources.
Because of high melting temperature, chlorine, fluorine, phosphorus and alkali metal in the materials are in ion state in the molten state, so that corrosion to furnace body refractory materials is extremely serious, the service life of the refractory materials is generally short, and the operation and maintenance cost of equipment is extremely expensive.
Disclosure of Invention
In view of the shortcomings or drawbacks of the prior art, one aspect of the present utility model is to provide a furnace wall.
The furnace wall structure provided by the utility model is composed of an inner heat-resistant layer, a cooling structure layer, an outer heat-resistant layer and a shell, wherein the inner heat-resistant layer, the cooling structure layer, the outer heat-resistant layer and the shell are sequentially arranged from the inside to the outside of the furnace, the cooling structure layer is provided with a cooling medium inlet and a cooling medium outlet, cooling medium enters through the cooling medium inlet and then flows through a furnace wall circumferential area and is discharged through the cooling medium outlet, and the heat conductivity coefficient of the inner heat-resistant layer material is larger than that of the outer heat-resistant layer material.
Alternatively, the expansion coefficient of the material of the outer heat-resistant layer is smaller than that of the material of the inner heat-resistant layer, and the outer heat-resistant layer has air permeation resistance.
Alternatively, the thickness of the inner heat-resistant layer is 50-120 mm.
Alternatively, the water cooling layer is provided with a plurality of partition boards, and the partition boards divide the water cooling layer into S-shaped cooling medium passages.
Alternatively, the furnace wall is internally provided with claw nails, and the claw nails are positioned on the cooling structure layer and the internal heat-resistant layer.
The utility model also provides a melting furnace for melting solid waste gas. The solid waste gasification melting furnace comprises a furnace body, wherein a material inlet and a gas outlet are formed in the axial top of the furnace body, and a gas phase zone, a solid phase zone and a slag zone are sequentially formed in the furnace body from the axial top to the bottom;
the furnace wall between the gas phase region and the solid phase region is provided with a heat source generator mounting port, and the heat source generator is a plasma torch generator, an oxygen-enriched combustor or a pure oxygen combustor; a slag discharge port is arranged on the side wall of the slag zone;
the furnace body side wall structure provided with the heat source generator mounting port and the solid phase area and the slag area is the furnace wall; the furnace walls at other parts of the solid waste gasification melting furnace are of a refractory structure.
In an alternative scheme, the thickness of the side wall of the furnace body adopting the furnace wall structure is smaller than the thickness of the furnace wall at other parts of the solid waste gasification melting furnace.
Alternatively, the side wall of the furnace body of the gas phase zone is provided with a combustion air inlet.
The furnace wall is of a water-cooling furnace wall structure, the water-cooling furnace wall is adopted to replace a hot fireplace mode when a pure refractory material is built, slag can be formed on the surface of the water-cooling wall, so that the slag becomes another type of refractory material, slag-in-slag resistance is realized, and the loss speed of the refractory material is reduced. And refractory materials are built on the inner side and the outer side of the furnace body, so that gas in slag can be effectively prevented from overflowing through the refractory materials.
Drawings
FIG. 1 is a schematic view of the structure of a furnace wall according to the present utility model.
FIG. 2 is a schematic view of the structure of the cooling layer in the furnace wall according to the present utility model.
FIG. 3 is a schematic view of the structure of the melting furnace of the present utility model.
Detailed Description
Unless specifically stated otherwise, scientific and technical terms and methods or processes herein are to be understood by one of ordinary skill in the relevant art or to be implemented using existing related processes or methods.
The terms of axial direction, upward direction, downward direction and the like are consistent with the corresponding directions or orientations in the drawings of the specification, and it should be noted that the directions or orientations shown in the drawings of the specification are examples of the present utility model, and those skilled in the art may make equivalent rotations, exchanges and the like based on the disclosure herein.
Referring to fig. 1, the furnace wall of the utility model is an inner heat-resistant layer 84, a cooling structure layer 83, an outer heat-resistant layer 82 and a shell 81 which are sequentially arranged from inside to outside of the furnace, wherein the cooling structure layer is provided with a cooling medium inlet (301, 302) and a cooling medium outlet (302, 301), cooling medium flows through a circumferential region of the furnace wall, namely the whole furnace wall after entering the cooling structure layer through the cooling medium inlet and is discharged through the cooling medium outlet, and the heat conductivity of the inner heat-resistant layer material is far greater than that of the outer heat-resistant layer material, for example, the heat conductivity of the inner heat-resistant layer material is more than 5 times that of the outer heat-resistant layer material; the inner heat resistant layer 84 has a higher coefficient of thermal conductivity (in the preferred scheme, the coefficient of thermal conductivity of the inner heat resistant layer material is greater than 4W/m.k), and a solid slag layer with a certain thickness can be formed on the surface of the inner heat resistant layer 84, and the solid slag layer can effectively prevent the slag from contacting with the inner heat resistant layer 84, so that the inner heat resistant layer 84 is not corroded and eroded by the liquid slag, and the service life of the refractory is greatly prolonged.
Materials for the inner heat-resistant layer suitable for use in the above-described aspects of the present utility model are as follows: silicon carbide, silicon carbide combined with silicon nitride. The material of the external heat-resistant layer is such as high-purity corundum and the like.
In a further alternative, the inner heat resistant layer 84 has a thickness of 50 to 120mm and may be an unshaped refractory material, i.e., castable or shaped refractory brick.
In still other aspects, the expansion coefficient of the outer heat resistant layer material is less than the expansion coefficient of the inner heat resistant layer material, and the outer heat resistant layer has gas permeation resistance; the external heat-resistant layer is made of a low expansion coefficient and air-proof refractory material, so that high-temperature flue gas generated in the furnace can be effectively prevented from overflowing from the furnace to the external environment.
In a further preferred embodiment, as shown in fig. 2, a plurality of partitions 303 are provided in the cooling structure layer, and the plurality of partitions partition the water cooling layer into S-shaped cooling medium passages. In the specific process, the flow velocity of water in the water cooling structure is required to be more than 1m/s so as to ensure sufficient cooling effect.
In some further solutions or solutions based on the above solutions, the cooling structure layer is fixed with claws 85 close to the inner wall of the furnace, after which the inner heat-resistant material is arranged in the inner wall of the cooling structure layer to form a heat-resistant layer 84, and the heat-resistant material coats the claws, in which the claws on the one hand play a role in fixing the heat-resistant material, and on the other hand increase the heat exchange area of the inner heat-resistant layer, so as to improve the heat exchange coefficient of the inner heat-resistant material and increase the slag hanging effect.
Referring to fig. 3, the melting furnace of the utility model comprises a furnace body 1, wherein a material inlet 5 and a gas outlet 3 are arranged at the axial top of the furnace body, and a gas phase zone, a solid phase zone and a slag zone are sequentially arranged in the furnace body from the axial top to the bottom; the furnace wall between the gas phase region and the solid phase region is provided with a heat source generator mounting port 6, wherein the heat source generator 7 can be a plasma torch generator, an oxygen-enriched burner or a pure oxygen burner; the side wall of the slag zone is provided with a slag discharge port 9;
the furnace body side wall structure provided with the heat source generator mounting port and the solid phase area and the slag area is the furnace wall structure 8; the furnace walls (namely gas phase areas) at other parts of the solid waste gasification melting furnace are of a common refractory structure 2. In the preferred scheme, the thickness of the side wall of the furnace body adopting the furnace wall structure is smaller than the thickness of the furnace wall at other parts of the solid waste gasification melting furnace.
When the solid waste gasification melting furnace runs, solid dangerous waste is melted at high temperature to be in a liquid state above a solid phase area when meeting a heat source generator after being added into the furnace through a material inlet, liquid slag enters a liquid phase area, and when meeting a furnace wall with a cooling structure layer inside, a solid slag layer with a certain thickness can be formed on the surface of the water cooling structure layer because the refractory material 84 close to one side of the furnace is high in coefficient, and the solid slag layer can effectively prevent the slag from being contacted with the refractory material 84, so that the refractory material 84 is not corroded and eroded by the liquid slag, and the service life of the refractory material is greatly prolonged; slag is discharged through a slag outlet 9 at the bottom of the furnace body; and the flue gas generated by high-temperature melting is discharged through a gas outlet 3.
In a further aspect, the outer refractory layer 82 is constructed with a low coefficient of expansion, gas impermeable refractory material to effectively prevent gas in the slag from escaping from the furnace to the environment.
In some schemes, a combustion air inlet 4 is arranged on the side wall of the gas phase zone of the melting furnace, so that enough oxygen is provided for gasification and incineration of organic matters.
Claims (8)
1. The furnace wall is characterized by comprising an inner heat-resistant layer, a cooling structure layer, an outer heat-resistant layer and a shell, wherein the inner heat-resistant layer, the cooling structure layer, the outer heat-resistant layer and the shell are sequentially arranged from the inside to the outside of the furnace, the cooling structure layer is provided with a cooling medium inlet and a cooling medium outlet, cooling medium enters through the cooling medium inlet and then flows through a circumferential region of the furnace wall, and then is discharged through the cooling medium outlet, and the heat conductivity coefficient of the inner heat-resistant layer material is larger than that of the outer heat-resistant layer material.
2. The furnace wall according to claim 1, wherein the outer heat resistant layer material has a coefficient of expansion that is less than the coefficient of expansion of the inner heat resistant layer material, and the outer heat resistant layer has gas permeability resistance.
3. The furnace wall according to claim 1, wherein the thickness of the inner heat resistant layer is 50 to 120mm.
4. The furnace wall according to claim 1, wherein the cooling structure layer is provided with a plurality of partitions dividing the water cooling layer into S-shaped cooling medium passages.
5. The furnace wall of claim 1, wherein the furnace wall has studs disposed therein and the studs are located in the cooling structure layer and the inner heat resistant layer.
6. The solid waste gasification melting furnace is characterized by comprising a furnace body, wherein a material inlet and a gas outlet are formed in the axial top of the furnace body, and a gas phase zone, a solid phase zone and a slag zone are sequentially formed in the furnace body from the axial top to the bottom;
the furnace wall between the gas phase region and the solid phase region is provided with a heat source generator mounting port, and the heat source generator is a plasma torch generator, an oxygen-enriched combustor or a pure oxygen combustor; a slag discharge port is arranged on the side wall of the slag zone;
the furnace body side wall structure provided with the heat source generator mounting port and the solid phase area and the slag area is the furnace wall of claim 1; the furnace wall outside the side wall of the furnace body provided with the heat source generator mounting port and the solid phase area and the slag area is of a refractory structure.
7. The solid waste gasification melting furnace as set forth in claim 6, wherein the thickness of the furnace wall using the furnace wall structure set forth in claim 1 is smaller than the thickness of the furnace wall other than the furnace wall provided with the heat source generator mounting port and the furnace wall other than the solid phase region and the slag region.
8. The solid waste gasification melting furnace as set forth in claim 6, wherein a combustion air inlet is provided in a side wall of the furnace body in the gas phase zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320082326.8U CN219810270U (en) | 2023-01-12 | 2023-01-12 | Furnace wall and solid waste gas melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320082326.8U CN219810270U (en) | 2023-01-12 | 2023-01-12 | Furnace wall and solid waste gas melting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219810270U true CN219810270U (en) | 2023-10-10 |
Family
ID=88209567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320082326.8U Active CN219810270U (en) | 2023-01-12 | 2023-01-12 | Furnace wall and solid waste gas melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219810270U (en) |
-
2023
- 2023-01-12 CN CN202320082326.8U patent/CN219810270U/en active Active
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