CN211946909U - Novel coke oven structure - Google Patents
Novel coke oven structure Download PDFInfo
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- CN211946909U CN211946909U CN201922399292.1U CN201922399292U CN211946909U CN 211946909 U CN211946909 U CN 211946909U CN 201922399292 U CN201922399292 U CN 201922399292U CN 211946909 U CN211946909 U CN 211946909U
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- 239000000571 coke Substances 0.000 title claims abstract description 56
- 238000002485 combustion reaction Methods 0.000 claims abstract description 57
- 238000003763 carbonization Methods 0.000 claims abstract description 36
- 206010022000 influenza Diseases 0.000 claims abstract description 26
- 239000003034 coal gas Substances 0.000 claims abstract description 24
- 239000002912 waste gas Substances 0.000 claims abstract description 20
- 239000000779 smoke Substances 0.000 claims abstract description 13
- 239000003245 coal Substances 0.000 claims abstract description 11
- 230000001172 regenerating effect Effects 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 55
- 238000005338 heat storage Methods 0.000 claims description 28
- 230000001413 cellular effect Effects 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 238000004939 coking Methods 0.000 claims description 5
- 239000003546 flue gas Substances 0.000 claims description 5
- 239000011449 brick Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 2
- 230000000153 supplemental effect Effects 0.000 claims 2
- 238000013461 design Methods 0.000 abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 210000003850 cellular structure Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Coke Industry (AREA)
Abstract
The utility model relates to a novel coke oven structure, which comprises an oven top, a combustion chamber, a carbonization chamber, a chute area, a regenerator and a small flue; the combustion chamber is connected with the regenerator through a chute and consists of a plurality of double-linked vertical flues, the tops of the vertical flues forming the double-linked vertical flues are communicated through a spanning hole, and the bottoms of the vertical flues are communicated through a waste gas circulation hole; the lower part of each regenerative chamber is provided with a small flue; a fire observation hole is arranged on the top of each vertical flue; the top of the furnace above each carbonization chamber is provided with a coal charging port/a smoke guide hole and a riser hole; the vertical flame path is internally provided with a plurality of sections of coal gas outlets and a plurality of sections of air outlets along the height direction, and the bottom surface of the carbonization chamber is higher than the bottom surface of the combustion chamber corresponding to the chute port. The utility model discloses an improve the vertical flame path structure of coke oven combustion chamber, realize the combustion process under the multiple low-nitrogen combustion mechanism, adopt the brand-new design that the carbomorphism room bottom surface is higher than the combustion chamber bottom surface simultaneously, eliminate because of the sectional combustion causes the not enough risk that the coke is grown of appearance of carbomorphism room bottom heat supply.
Description
Technical Field
The utility model relates to a coke oven technical field especially relates to a can realize novel coke oven structure of low nitrogen oxide formation.
Background
With the continuous development of the whole process technology of the machine-mounted coke oven, the height of a coke oven carbonization chamber is developed from originally less than 2.8 meters to 7.65 meters, and an 8.43 meter test oven of Wude Germany is put into production for many years. At present, the development of new coke ovens is approaching the limit in the direction of research on the increase in the height and volume of the coking chambers.
With the increasing call for environmental protection requirements, the development of coke oven technology is moving to a new direction. In the production process of the coke oven, how to effectively reduce the unorganized emission and organized emission of smoke has been more and more emphasized, and pollution treatment from sources has become a new subject of the research and development of the coke oven equipment process.
At present, the design of a coke oven combustion system still stays at the stage of simple sectional combustion and foreign advanced technology simulation, and mainly aims at solving the problem of reducing the generation of nitrogen oxides by setting a vertical flue structure, and positions and flow rates of airflow outlet sections, and the existing mature low-nitrogen combustion technology and non-selective catalytic reduction technology are applied to reduce the emission of the nitrogen oxides.
In addition, for the coke oven adopting the staged combustion technology, because the heating mode that the bottom heating quantity is far larger than the top in the original coke oven design is changed, and the bottom surface of the combustion chamber and the bottom surface of the carbonization chamber corresponding to the inclined passage opening in the traditional coke oven are both positioned on the same horizontal plane, the risk of coke generation at the lower part of the carbonization chamber of the coke oven exists.
Disclosure of Invention
The utility model provides a novel coke oven structure through improving the vertical flame path structure of coke oven combustion chamber, realizes the combustion process under the multiple low-nitrogen combustion mechanism, adopts the brand-new design that the carbonization chamber bottom surface is higher than the combustion chamber bottom surface simultaneously, eliminates because of the sectional combustion causes the not enough risk that the raw coke appears of carbonization chamber bottom heat supply.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a novel coke oven structure comprises an oven top, a combustion chamber, a carbonization chamber, a chute area, a regenerator and a small flue; the combustion chambers are arranged alternately with the carbonization chambers, are connected with the regenerator through inclined chutes, and consist of a plurality of double-linked vertical flues, the tops of the vertical flues forming the double-linked vertical flues are communicated through crossing holes, and the bottoms of the vertical flues are communicated through waste gas circulation holes; the lower part of each regenerative chamber is provided with a small flue which is connected with an external flue gas channel through an exchange shutter; a fire observation hole is arranged on the top of each vertical flue; the top of the furnace above each carbonization chamber is provided with a coal charging port/a smoke guide hole and a riser hole; the vertical flame path is internally provided with a plurality of sections of coal gas outlets and a plurality of sections of air outlets along the height direction, and the bottom surface of the carbonization chamber is higher than the bottom surface of the combustion chamber corresponding to the chute port.
In the multi-section coal gas outlet and the multi-section air outlet, the first section coal gas outlet is higher than the first section air outlet from bottom to top, and compared with the first section air outlet and the second section air outlet, the first section coal gas outlet is far away from the waste gas circulation hole; the coal gas outlets of the middle sections and the air outlets of the middle sections are arranged in a staggered mode, and the air outlet of the last section is higher than the coal gas outlet of the last section.
The bottom surface of the carbonization chamber is higher than the upper edge of the waste gas circulating hole but lower than the elevation of the first-section coal gas outlet.
The combustion chamber is formed by surrounding a combustion chamber furnace wall, the combustion chamber furnace wall obliquely extends into the carbonization chamber at the lower part of the corresponding carbonization chamber, so that the cross section of the lower part of the carbonization chamber is in an isosceles trapezoid shape.
And the furnace top above the vertical flue is also provided with a compensation hole for introducing supplementary waste gas or blended low-partial-pressure reducing gas into the vertical flue.
The heat storage chamber is provided with a cellular structure, namely the air heat storage chamber is divided into a plurality of air cellular heat storage chambers along the height direction, and the gas heat storage chamber is divided into a plurality of gas cellular heat storage chambers along the height direction; the first section of gas outlet is independently arranged in one gas grid heat storage chamber, and the rest sections of gas outlets are arranged in one or more gas grid heat storage chambers; the first section of air outlet is independently arranged in one air cellular heat storage chamber, and the rest sections of air outlets are arranged in one to more air cellular heat storage chambers; correspondingly, the small flues are also connected with each air cellular heat storage chamber/gas cellular heat storage chamber along the high-direction cellular as a plurality of small flues or bundling small flues.
The junction of the small flue and the waste gas shutter is provided with a plurality of manual adjusting flashboards.
The main body of the coke oven is built by refractory bricks, the positions of the coal charging port/smoke guide port, the riser hole, the observation hole, the compensation hole and the inclined chute which are correspondingly arranged adopt castable precast blocks, and the coal charging port/smoke guide port, the riser hole, the observation hole, the compensation hole and the inclined chute are respectively arranged in the corresponding castable precast blocks.
The chute area of the coke oven is provided with a plurality of supplementary heating holes on the front surface of the coke oven, and the supplementary heating holes are respectively connected with the corresponding gas chute and the corresponding air chute.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the vertical flue structure of the combustion chamber of the coke oven for realizing low nitrogen oxide combustion provides a more reasonable application mode, and solves the defect that the bottom of the carbonization chamber is heated insufficiently and is easy to appear in a sectional heating coke oven, especially in the sectional heating coke oven adopting a sectional heating mode that a section of coal gas outlet is not positioned at the bottom surface of the vertical flue;
2) after the bottom surface of the carbonization chamber is heightened, the area of the bottom of the combustion chamber, which is provided with the waste gas circulation hole, can be avoided, so that the furnace wall of the combustion chamber is firmer and more durable; the lower part of the carbonization chamber is in an isosceles trapezoid with a wide upper opening and a narrow lower opening, so that the carbonization chamber has higher structural strength, is more wear-resistant, is beneficial to heat transfer and accelerates the maturing speed of the bottom of a coke cake;
3) the integration of a plurality of low-nitrogen combustion technologies such as waste gas circulation, dense-dilute combustion, deep low-oxygen combustion and the like can be realized in a real sense, and the distribution of combustible gas and combustion-supporting gas in the vertical flue can be accurately controlled through the arrangement of the heat storage chamber high-direction grids, the flashboards at the end parts of the small flues and the arrangement of the grate plates of the heat storage chamber, so that the novel coke oven heating system is formed;
4) the furnace top is also provided with a compensation hole, the purposes of controlling the temperature of the furnace top space and non-selectively catalyzing and reducing nitrogen oxides can be achieved by introducing compensation gases with different temperatures and different types, and the compensation hole is used as a compensation means and is brand new in the design of a coke oven;
5) the castable precast block is applied to the positions of the furnace top, the chute area and the like, so that the vibration and displacement caused by mechanical rolling, repeated coke pushing and other operations of the coke oven can be reduced, the gas leakage in the coke oven caused by shattering between refractory materials is avoided, and the unorganized emission of smoke dust is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a novel coke oven structure according to the present invention.
FIG. 2 is a schematic view of the relative position between the bottom surface of the carbonization chamber and the bottom surface of the combustion chamber.
In the figure: 1. furnace top 2, combustion chamber 3, chute zone 4, regenerator 5, small flue 11, compensation hole 12, observation hole 13, coal charging port/smoke guide port 21, first section gas outlet 22, first section air outlet 23, waste gas circulation hole 24, middle section gas outlet 25, last section gas outlet 26, last section air outlet 27, crossing hole 28, combustion chamber wall 31, combustion chamber bottom 32 corresponding to chute port, carbonization chamber bottom 33, chute 41, air cellular regenerator/gas cellular regenerator 51, and a plurality of small flue
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1, the novel coke oven structure of the present invention comprises an oven top 1, a combustion chamber 2, a carbonization chamber, a chute area 3, a regenerator 4 and a small flue 5; the combustion chambers 2 and the carbonization chambers are arranged alternately, the combustion chambers 2 are connected with the regenerator 4 through inclined chutes, the combustion chambers 2 consist of a plurality of double vertical flues, the tops of the vertical flues forming the double vertical flues are communicated through crossing holes 27, and the bottoms of the vertical flues are communicated through waste gas circulation holes 23; the lower part of each regenerative chamber 4 is provided with a small flue 5 which is connected with an external flue gas channel through an exchange shutter; a fire observation hole 12 is arranged on the top of each vertical flue; a coal charging port/smoke guide hole 13 and an ascending pipe hole are arranged on the top of the furnace above each carbonization chamber; a plurality of sections of coal gas outlets and a plurality of sections of air outlets are arranged in the vertical flame path along the height direction, and the bottom surface 32 of the carbonization chamber is higher than the bottom surface 31 of the combustion chamber corresponding to the chute port (as shown in figure 2).
In the multi-section coal gas outlet and the multi-section air outlet, the first section coal gas outlet 21 is higher than the first section air outlet 22 from bottom to top, and compared with the first section coal gas outlet 21, the first section coal gas outlet is far away from the waste gas circulating hole 23; the gas outlets 24 of the middle section and the air outlets of the middle section are arranged in a staggered way, and the air outlet 26 of the last section is higher than the gas outlet 25 of the last section.
The bottom surface 32 of the carbonization chamber is higher than the upper edge of the waste gas circulating hole 23 but lower than the level of the first-stage gas outlet 21.
The combustion chamber 2 is formed by enclosing a combustion chamber furnace wall 28, and the combustion chamber furnace wall 28 obliquely extends into the carbonization chamber at the lower part of the corresponding carbonization chamber, so that the cross section of the lower part of the carbonization chamber is in an isosceles trapezoid shape.
And the furnace top 1 above the vertical flue is also provided with a compensation hole 11 for introducing supplementary waste gas or blended low-partial-pressure reducing gas into the vertical flue.
The heat storage chamber 4 is provided with a cellular structure, namely the air heat storage chamber is divided into a plurality of air cellular heat storage chambers along the height direction, and the gas heat storage chamber is divided into a plurality of gas cellular heat storage chambers along the height direction; the first section of gas outlet 21 is independently arranged in one gas grid heat storage chamber, and the rest sections of gas outlets are arranged in one or more gas grid heat storage chambers; the first section of air outlet 22 is independently arranged in one air cellular heat storage chamber, and the rest sections of air outlets are arranged in one or more air cellular heat storage chambers; correspondingly, the small flues 5 are also connected to the individual air/gas cell regenerators 41 as a plurality of small flues 51 or bundled small flues along the height direction cells.
And a plurality of manual adjusting flashboards are arranged at the joint of the small flue 5 and the waste gas shutter.
The coke oven body is built by adopting refractory bricks, the positions of the coal charging port/smoke guide port 13, the riser hole, the observation hole 12, the compensation hole 11 and the chute 33 which are correspondingly arranged adopt castable precast blocks, and the coal charging port/smoke guide port 13, the riser hole, the observation hole 12, the compensation hole 11 and the chute 33 are respectively arranged in the corresponding castable precast blocks.
The chute area 1 of the coke oven is provided with a plurality of supplementary heating holes on the front surface of the coke oven, and the supplementary heating holes are respectively connected with the corresponding gas chute and the corresponding air chute.
Based on the utility model discloses a novel sectional heating combustion method of coke oven structure, the gas volume that flows out from first section coal gas export 21 is no more than 90% of the total supply volume of coal gas, the air volume that flows out from first section air outlet 22 is no more than 90% of the total supply volume of air, the gas volume of each section coal gas export thereafter, the air volume of each section air outlet all control according to the skew 1 of the air excess coefficient that makes the updraft to the volume of coal gas is surplus in the updraft behind last section coal gas export 25.
A novel coke oven structure adopts the novel inclined flue district structure that the height of the bottom surface 32 of the carbonization chamber is higher than the height of the bottom surface 31 of the combustion chamber corresponding to the opening of the inclined flue, and the sectional heating structure that the first section coal gas outlet 21 at the bottom of the combustion chamber 2 is higher than the first section air outlet 22.
The furnace top 1 is provided with a fire observation hole 12, and is also provided with a compensation hole 11 above each vertical flue, and the compensation hole 11 can supplement waste gas or perform low partial pressure reducing gas operation after mixing on the combustion chamber 2 through an external pipeline of the coke oven. This operation can be used to reduce the temperature of the exhaust gas in the combustion chamber 2 or to supplement the heating of the exhaust gas in the combustion chamber 2 with the aim of regulating the temperature in the top space of the carbonization chamber.
The vertical flame path in the combustion chamber 2 adopts a structure of simultaneously heating gas and air in sections, wherein a first section gas outlet 21 is higher than a first section air outlet 22 and is relatively far away from a waste gas circulating hole 23, the position of each middle section gas outlet 24 is staggered with that of each middle section air outlet, and a last section air outlet 26 is highest. Thereby ensuring that the air at the bottom of the vertical flue firstly passes through the combustion-supporting gas which is circularly diluted by the waste gas and then is combusted with the coal gas. The ascending gas flow after one-stage combustion is diluted by the gas or air fed in multiple stages, so that the deviated combustion is realized.
The chute area 3 corresponding to the front of the coke oven can be provided with supplementary heating holes connected with the gas chute and the air chute and used for supplementary heating of the burner flame path, thereby improving the temperature of the burner flame path.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (9)
1. A novel coke oven structure comprises an oven top, a combustion chamber, a carbonization chamber, a chute area, a regenerator and a small flue; the combustion chambers are arranged alternately with the carbonization chambers, are connected with the regenerator through inclined chutes, and consist of a plurality of double-linked vertical flues, the tops of the vertical flues forming the double-linked vertical flues are communicated through crossing holes, and the bottoms of the vertical flues are communicated through waste gas circulation holes; the lower part of each regenerative chamber is provided with a small flue which is connected with an external flue gas channel through an exchange shutter; a fire observation hole is arranged on the top of each vertical flue; the top of the furnace above each carbonization chamber is provided with a coal charging port/a smoke guide hole and a riser hole; the vertical flue is characterized in that a plurality of sections of coal gas outlets and a plurality of sections of air outlets are arranged in the vertical flue along the height direction, and the bottom surface of the carbonization chamber is higher than the bottom surface of the combustion chamber corresponding to the chute port.
2. The novel coke oven structure of claim 1, wherein the first section of the gas outlet is higher than the first section of the air outlet from bottom to top in the multi-section of the gas outlet and the multi-section of the air outlet, and compared with the first section of the gas outlet and the first section of the air outlet, the first section of the gas outlet is far away from the waste gas circulation hole; the coal gas outlets of the middle sections and the air outlets of the middle sections are arranged in a staggered mode, and the air outlet of the last section is higher than the coal gas outlet of the last section.
3. The novel coke oven construction of claim 1, wherein the floor of the coking chamber is above the upper edge of the flue gas recirculation port but below the elevation of the first stage gas outlet.
4. The coke oven as claimed in claim 1, wherein the combustion chamber is defined by walls of the combustion chamber, and the walls of the combustion chamber extend obliquely into the coking chamber at the lower part of the coking chamber, so that the cross section of the lower part of the coking chamber is isosceles trapezoid.
5. The novel coke oven structure of claim 1, wherein the top of the oven above the vertical flue is further provided with compensation holes for introducing supplementary waste gas or blended low partial pressure reducing gas into the vertical flue.
6. The novel coke oven structure of claim 1, wherein the regenerator is cellular, i.e., the air regenerator is divided into a plurality of air cellular regenerators along the height direction, and the gas regenerator is divided into a plurality of gas cellular regenerators along the height direction; the first section of gas outlet is independently arranged in one gas grid heat storage chamber, and the rest sections of gas outlets are arranged in one or more gas grid heat storage chambers; the first section of air outlet is independently arranged in one air cellular heat storage chamber, and the rest sections of air outlets are arranged in one to more air cellular heat storage chambers; correspondingly, the small flues are also connected with each air cellular heat storage chamber/gas cellular heat storage chamber along the high-direction cellular as a plurality of small flues or bundling small flues.
7. The novel coke oven construction of claim 1, wherein a plurality of manual adjustment shutters are provided at the junction of the small flue and the flue gas shutter.
8. The novel coke oven structure of claim 1, wherein the coke oven body is built by refractory bricks, the parts corresponding to the coal charging port/smoke guide port, the riser hole, the observation hole, the compensation hole and the chute are made of castable precast blocks, and the coal charging port/smoke guide port, the riser hole, the observation hole, the compensation hole and the chute are respectively arranged in the corresponding castable precast blocks.
9. The novel coke oven structure of claim 1, wherein the chute area of the coke oven is provided with a plurality of supplemental heating holes on the front surface of the coke oven, and the supplemental heating holes are respectively connected with the corresponding gas chute and the corresponding air chute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922399292.1U CN211946909U (en) | 2019-12-27 | 2019-12-27 | Novel coke oven structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922399292.1U CN211946909U (en) | 2019-12-27 | 2019-12-27 | Novel coke oven structure |
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| Publication Number | Publication Date |
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| CN211946909U true CN211946909U (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922399292.1U Withdrawn - After Issue CN211946909U (en) | 2019-12-27 | 2019-12-27 | Novel coke oven structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110938447A (en) * | 2019-12-27 | 2020-03-31 | 中冶焦耐(大连)工程技术有限公司 | Novel coke oven structure and sectional heating combustion method thereof |
-
2019
- 2019-12-27 CN CN201922399292.1U patent/CN211946909U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110938447A (en) * | 2019-12-27 | 2020-03-31 | 中冶焦耐(大连)工程技术有限公司 | Novel coke oven structure and sectional heating combustion method thereof |
| CN110938447B (en) * | 2019-12-27 | 2024-06-11 | 中冶焦耐(大连)工程技术有限公司 | Coke oven structure and sectional heating combustion method thereof |
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