CN112724989A - Adjustable exhaust gas circulation hole structure - Google Patents
Adjustable exhaust gas circulation hole structure Download PDFInfo
- Publication number
- CN112724989A CN112724989A CN202011546457.4A CN202011546457A CN112724989A CN 112724989 A CN112724989 A CN 112724989A CN 202011546457 A CN202011546457 A CN 202011546457A CN 112724989 A CN112724989 A CN 112724989A
- Authority
- CN
- China
- Prior art keywords
- gas circulation
- waste gas
- circulation hole
- brick
- adjusting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000002912 waste gas Substances 0.000 claims abstract description 53
- 239000011449 brick Substances 0.000 claims abstract description 45
- 239000000571 coke Substances 0.000 claims abstract description 23
- 238000002485 combustion reaction Methods 0.000 claims abstract description 18
- 238000005192 partition Methods 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 abstract description 11
- 239000003034 coal gas Substances 0.000 abstract description 5
- 239000011465 paving brick Substances 0.000 abstract description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 230000001174 ascending effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B29/00—Other details of coke ovens
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B27/00—Arrangements for withdrawal of the distillation gases
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Coke Industry (AREA)
Abstract
The invention relates to an adjustable waste gas circulation hole structure, which comprises waste gas circulation holes arranged at the bottom of a partition wall of a double-linkage vertical flue; an adjusting brick groove is formed in the bottom paving brick of the combustion chamber outside the waste gas circulating hole and used for placing an adjusting brick; the adjusting bricks with different widths or different quantities are placed at different positions of the adjusting brick grooves, so that the waste gas circulation area at the position of the waste gas circulation hole is adjusted. The invention can realize the adjustment of the waste gas circulation quantity at the waste gas circulation hole through the adjusting brick, and ensure that the coke oven can have the matched waste gas circulation quantity when adopting different types of coal gas for heating.
Description
Technical Field
The invention relates to the technical field of coke ovens, in particular to a coke oven structure capable of being heated by coke oven gas and lean gas.
Background
In the production process of the coke oven with double vertical flues, the waste gas generated by the combustion of coal gas and air in the ascending vertical flue flows into the descending vertical flue through the crossing holes, and a part of the waste gas is pumped back into the ascending vertical flue through the circulating holes, and the combustion mode is called waste gas circulation. The waste gas circulation is adopted to dilute the coal gas, simultaneously reduce the concentration of oxygen and reduce the excess air coefficient in the vertical flame path, thereby slowing down the combustion speed, improving the air flow speed and lengthening the flame. The waste gas circulation is beneficial to uniformly heating the coke cake up and down, and the high-direction heating uniformity of the coke oven is improved, so that the coke quality is improved, the coking time is shortened, the yield is increased, the effect of reducing the coking heat consumption is achieved, the concentration of nitrogen oxides in the waste gas can be reduced, and the environment-friendly requirement is met better.
When the blast furnace gas is used for heating, the combustion flame of the blast furnace gas is longer, and the proportion of the required waste gas circulation volume is less; when the coke oven gas is used for heating, the combustion flame of the coke oven gas is short, and the purposes of lengthening the flame and improving the high-direction heating uniformity can be achieved only by increasing the proportion of the circulating amount of waste gas. The existing waste gas circulating hole structure is nonadjustable, namely, a fixed opening size is adopted, when the type of heating gas is switched, although the injection force and the resistance are changed, the waste gas amount can be automatically adjusted to a certain extent through the buoyancy difference, but the adjusting range is limited, so that the concentration of nitrogen oxide can not be effectively controlled when the reheating coke oven is heated by using coke oven gas.
The Chinese patent application with the application number of 201910109562.2 discloses a waste gas circulation hole structure of a coke oven combustion chamber, wherein the outer side or two sides of a waste gas flow path of a waste gas circulation hole are of arc structures, and the circulation waste gas flow path is adjusted by changing the section shape of the waste gas circulation hole, so that descending waste gas is sucked into an ascending vertical flame path through the waste gas circulation hole as much as possible to be mixed with combustion gas flow, the purposes of diluting the gas concentration to the maximum extent and reducing the combustion intensity are achieved, flame lengthening is facilitated, and the high-direction heating uniformity of a carbonization chamber is improved. However, the exhaust gas circulation hole in the technical scheme only adjusts the path of the exhaust gas through structural change, and the size of the exhaust gas circulation hole is not adjusted.
Disclosure of Invention
The invention provides an adjustable waste gas circulation hole structure, which can realize the adjustment of the waste gas circulation quantity at the waste gas circulation hole through an adjusting brick, and ensure that the coke oven can have the matched waste gas circulation quantity when heated by different types of coal gas.
In order to achieve the purpose, the invention adopts the following technical scheme:
an adjustable waste gas circulation hole structure comprises waste gas circulation holes arranged at the bottom of a partition wall of a double-linkage vertical flue; an adjusting brick groove is formed in the bottom paving brick of the combustion chamber outside the waste gas circulating hole and used for placing an adjusting brick; the adjusting bricks with different widths or different quantities are placed at different positions of the adjusting brick grooves, so that the waste gas circulation area at the position of the waste gas circulation hole is adjusted.
The adjusting brick groove is directly formed by paving the combustion chamber bottom paving bricks with grooves on the tops at corresponding positions when the combustion chamber of the coke oven is built.
The adjusting brick groove is arranged on one side or two sides of the waste gas circulating hole.
The adjusting brick is provided with a hook hole matched with the hook tool.
The length of the adjusting brick groove is plus (100-200) mm in the direction corresponding to the waste gas circulation hole.
The width of the brick adjusting groove is the thickness of the adjusting brick plus (5-10) mm.
Compared with the prior art, the invention has the beneficial effects that:
1) the size of the waste gas circulation area at the waste gas circulation hole is changed by arranging the adjusting brick at the waste gas circulation hole so as to adapt to different requirements on waste gas circulation amount when the coke oven is heated by adopting different types of coal gas.
2) The proportion of coke oven waste gas circulation can be effectively adjusted, the flame height and the air excess coefficient are adjusted, the uniformity of the coke oven in the height direction heating is better improved, the temperature difference between the upper part and the lower part of a coke cake and the maturity difference are improved, the thermal efficiency of the coke oven is improved, the energy is saved, the concentration of nitrogen oxides is reduced, and the environment is improved.
Drawings
Fig. 1 is a schematic structural diagram of an adjustable exhaust gas circulation hole structure according to the present invention.
Fig. 2 is a view from direction a in fig. 1.
In the figure: 1. vertical flue partition wall 2, duplex vertical flue 3, waste gas circulation hole 4, adjusting brick groove 5, adjusting brick 6, combustion chamber bottom laying brick
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
as shown in fig. 1 and 2, the adjustable exhaust gas circulation hole structure of the present invention includes an exhaust gas circulation hole 3 disposed at the bottom of a partition wall 1 of a vertical flue of a twin vertical flue 2; an adjusting brick groove 4 for placing an adjusting brick 5 is arranged on a combustion chamber bottom laying brick 6 outside the waste gas circulating hole 3; the adjustment of the waste gas circulation area at the waste gas circulation hole 3 is realized by placing the adjusting bricks 5 with different widths or different numbers at different positions of the adjusting brick groove 4.
The adjusting brick groove 4 is directly formed by paving a combustion chamber bottom paving brick 6 with a groove at the top at the corresponding position when the combustion chamber of the coke oven is built.
The adjusting brick groove 4 is arranged on one side or two sides of the waste gas circulating hole 3.
And the adjusting brick 5 is provided with a hook hole matched with the hook tool.
The length of the adjusting brick groove 4 is plus (100-200) mm in the direction corresponding to the waste gas circulating hole 3.
The width of the adjusting brick groove 4 is 5 + (5-10) mm of the adjusting brick.
When the coke oven switches different types of heating gas, adjusting bricks 5 with corresponding sizes or numbers are placed or replaced in the adjusting brick slots 4 on the outer sides of the waste gas circulating holes according to the types of the heating gas, and the specific mode is consistent with the mode of placing or replacing the adjusting bricks of the chute openings.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. An adjustable waste gas circulation hole structure comprises waste gas circulation holes arranged at the bottom of a partition wall of a double-linkage vertical flue; the device is characterized in that an adjusting brick groove is formed in a bottom brick of the combustion chamber outside the waste gas circulation hole and used for placing an adjusting brick; the adjusting bricks with different widths or different quantities are placed at different positions of the adjusting brick grooves, so that the waste gas circulation area at the position of the waste gas circulation hole is adjusted.
2. The adjustable exhaust gas circulation hole structure as claimed in claim 1, wherein the adjustment brick groove is directly formed by laying a combustion chamber bottom laying brick with a groove at the top at a corresponding position when the combustion chamber of the coke oven is laid.
3. The adjustable exhaust gas circulation hole structure as claimed in claim 1 or 2, wherein the adjustment brick groove is provided at one side or both sides of the exhaust gas circulation hole.
4. The adjustable exhaust gas circulation hole structure as claimed in claim 1, wherein the adjusting brick is provided with hook holes for engaging with hooks.
5. The adjustable exhaust gas circulation hole structure as claimed in claim 1, wherein the length of the adjustment brick groove is + (100-200) mm in the corresponding direction of the exhaust gas circulation hole.
6. The adjustable exhaust gas circulation hole structure as claimed in claim 1, wherein the width of the adjustment brick groove is + 5-10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011546457.4A CN112724989A (en) | 2020-12-24 | 2020-12-24 | Adjustable exhaust gas circulation hole structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011546457.4A CN112724989A (en) | 2020-12-24 | 2020-12-24 | Adjustable exhaust gas circulation hole structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112724989A true CN112724989A (en) | 2021-04-30 |
Family
ID=75605076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011546457.4A Withdrawn CN112724989A (en) | 2020-12-24 | 2020-12-24 | Adjustable exhaust gas circulation hole structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112724989A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108329932A (en) * | 2018-03-30 | 2018-07-27 | 中冶焦耐(大连)工程技术有限公司 | It is a kind of to cross over the adjustable coke oven construction in hole and cross over hole adjusting method |
| CN214571696U (en) * | 2020-12-24 | 2021-11-02 | 中冶焦耐(大连)工程技术有限公司 | Adjustable exhaust gas circulation hole structure |
-
2020
- 2020-12-24 CN CN202011546457.4A patent/CN112724989A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108329932A (en) * | 2018-03-30 | 2018-07-27 | 中冶焦耐(大连)工程技术有限公司 | It is a kind of to cross over the adjustable coke oven construction in hole and cross over hole adjusting method |
| CN214571696U (en) * | 2020-12-24 | 2021-11-02 | 中冶焦耐(大连)工程技术有限公司 | Adjustable exhaust gas circulation hole structure |
Non-Patent Citations (1)
| Title |
|---|
| H.泽林斯基: "《炼焦化学》", 31 January 1993, 中国金属学会焦化学会出版, pages: 205 * |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210430 |
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| WW01 | Invention patent application withdrawn after publication |