CN204495049U - A kind of reduction furnace burner hearth internal structure taking back valve - Google Patents
A kind of reduction furnace burner hearth internal structure taking back valve Download PDFInfo
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- CN204495049U CN204495049U CN201520069811.7U CN201520069811U CN204495049U CN 204495049 U CN204495049 U CN 204495049U CN 201520069811 U CN201520069811 U CN 201520069811U CN 204495049 U CN204495049 U CN 204495049U
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- burner hearth
- return
- air door
- reduction furnace
- reduction
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Abstract
The utility model relates to a kind of reduction furnace burner hearth internal structure taking back valve, in order to solve the problem of the waste of reducing gas in existing reduction furnace production process, comprise the upper lower furnace body of reduction furnace, be arranged in the burner hearth of lower furnace body, it is characterized in that described burner hearth bottom is provided with conveying steel belt, roof of the furnace is provided with return-air door, and return-air door tilts towards conveying steel belt direction of advance.The showy hydrogen effectively lighter to density by return-air door stops, manufactures a downward gyration airflow, and the hydrogen not playing reduction is more fully contacted with reduction powder agglomates, thus saving gas, reduces costs, energy-conserving and environment-protective.
Description
Technical field
The utility model relates to reduction furnace technology, especially a kind of reduction furnace burner hearth internal structure taking back valve.
Background technology
Reduction furnace atmosphere decomposed ammonia in metal dust production process occupies very large cost; in normal reduction process, in reduction furnace, nitrogen easily sinks down into powder surface in stove, and hydrogen rising is just not easy to touch iron powder to be restored; so aborning, easily there is the waste of reducing atmosphere.Existing body of heater, in order to improve gas effciency, has in different ways according to structure difference.As a kind of medical combustion furnace with efficient burning rate that patent publication No. is CN103388819A, comprise the primary zone that body of heater surrounds, body of heater is provided with secondary combustion chamber, secondary combustion chamber communicates with primary zone, air mixing drum is provided with above secondary combustion chamber, this device can carry out repeated combustion to fuel, and the combustion rate of fuel is increased.And for example patent publication No. is CN103382526A, a kind of method and apparatus for Process of Direct Lead Smelting smelting reduction stove blowing gas, use Process of Direct Lead Smelting smelting reduction stove instead air brick near the spray gun of slag tap to substitute, the gas of certain pressure and temperature is entered by air brick the rising bubble group that reduction furnace formation has certain momentum, uniform agitation molten pool; Process of Direct Lead Smelting smelting reduction stove continues to use near the spray gun putting plumbous mouth, mainly jetted by the spray gun near high lead slag entrance natural sky and oxygen-enriched air, separately several the main coal injections of the spray gun away from high lead slag entrance and mist.If adopt in this way, then need to offer the requirement that multiple air jet system could meet this programme on reduction streamline, obviously unreasonable.
Summary of the invention
The purpose of this utility model is that the problem of the waste of reducing gas, provides a kind of reasonable in design in order to solve in existing reduction furnace production process, takes back the reduction furnace burner hearth internal structure of valve.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: a kind of reduction furnace burner hearth internal structure taking back valve, comprise the upper lower furnace body of reduction furnace, be arranged in the burner hearth of lower furnace body, it is characterized in that described burner hearth bottom is provided with conveying steel belt, roof of the furnace is provided with return-air door, and return-air door tilts towards conveying steel belt direction of advance (namely coming gas direction).The technical program forms structure according to decomposed ammonia: 2NH3 → N
2+ 3H
2known, reducing gas is primarily of nitrogen and hydrogen composition, hydrogen is reducing gas, nitrogen is protective gas, the density ratio of nitrogen and hydrogen is 14:1, in normal reduction process, nitrogen easily sinks down into powder surface in stove, and hydrogen rising is not easy to touch iron powder to be restored, the setting of return-air door makes the hydrogen in rising be stopped, gas in flowing because of by stop after, the power of a convolution can be produced, also a downward pressure will be generated, thus follow-up atmosphere sinks in drive stove, increase hydrogen to contact with powder agglomates, improve the utilization rate of hydrogen.
As preferably, described return-air door is plank frame, return-air door and conveying steel belt at 45 ° ± 5 ° of angles.Return-air door is horizontal at roof of the furnace along belt direction, carries out gear cut top hydrogen.
As preferably, the described height of return-air door in burner hearth is less than or equal in burner hearth high by 1/5th.Do not affect the main working performance of main channel.
As preferably, in described burner hearth, reducing gas flows to contrary with conveying steel belt.Effective generation is returned resistance and is manufactured lower pressure gas stream.
As preferably, described roof of the furnace is provided with some return-air doors, and return-air door spacing is more than or equal to 300mm.Best return-air door row column data is drawn according to practice.
Effective effect of the present utility model is: the showy hydrogen effectively lighter to density by return-air door stops, manufacture a downward gyration airflow, the hydrogen not playing reduction is more fully contacted with reduction powder agglomates, thus saving gas, reduce costs, be beneficial to environmental protection.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present utility model.
In figure: 1. body of heater, 2. burner hearth, 3. reduction powder agglomates, 4. conveying steel belt, 5. return-air door.
Detailed description of the invention
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
A kind of reduction furnace burner hearth internal structure taking back valve of the present embodiment, design in the upper lower furnace body 1 of reduction furnace, as shown in Figure 1, upper lower furnace body 1 forms burner hearth 2, and burner hearth bottom is conveying steel belt 4, conveying steel belt 4 is reduction powder agglomates 3.At the roof of the furnace of pipelining, a return-air door 5 is set at interval of 300mm, return-air door 5 is platy structure, and tilt towards conveying steel belt 4 direction of advance, its inclination is 45 °, and the vertical height of return-air door 5 in burner hearth 2 (with conveying steel belt 4 vertical direction) equals high by 1/5th in burner hearth.
In burner hearth 2, reducing gas flows to contrary with conveying steel belt 4, and during work, return-air door 5 blocks the top hydrogen in burner hearth that floats, and makes it produce a rotating force, the pressure that generation one is downward thus, drives follow-up atmosphere in stove to sink.
Above-described embodiment is to explanation of the present utility model, is not to restriction of the present utility model, anyly all belongs to protection domain of the present utility model to the structure after simple transformation of the present utility model.
Claims (5)
1. take back the reduction furnace burner hearth internal structure of valve for one kind, comprise the upper lower furnace body (1) of reduction furnace, be arranged in the burner hearth (2) of lower furnace body, it is characterized in that described burner hearth bottom is provided with conveying steel belt (4), roof of the furnace is provided with return-air door (5), and return-air door tilts towards conveying steel belt direction of advance.
2. the reduction furnace burner hearth internal structure taking back valve according to claim 1, is characterized in that described return-air door (5) is plank frame, return-air door and conveying steel belt (4) at 45 ° ± 5 ° of angles.
3. the reduction furnace burner hearth internal structure taking back valve according to claim 1, is characterized in that the described height of return-air door (5) in burner hearth (2) is less than or equal in burner hearth high by 1/5th.
4. the reduction furnace burner hearth internal structure taking back valve according to claim 1 or 2 or 3, is characterized in that described burner hearth (2) interior reducing gas flows to contrary with conveying steel belt (4).
5. the reduction furnace burner hearth internal structure taking back valve according to claim 1 or 2 or 3, it is characterized in that described roof of the furnace is provided with some return-air doors (5), return-air door spacing is more than or equal to 300mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520069811.7U CN204495049U (en) | 2015-02-02 | 2015-02-02 | A kind of reduction furnace burner hearth internal structure taking back valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520069811.7U CN204495049U (en) | 2015-02-02 | 2015-02-02 | A kind of reduction furnace burner hearth internal structure taking back valve |
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| Publication Number | Publication Date |
|---|---|
| CN204495049U true CN204495049U (en) | 2015-07-22 |
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| CN201520069811.7U Active CN204495049U (en) | 2015-02-02 | 2015-02-02 | A kind of reduction furnace burner hearth internal structure taking back valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269296A (en) * | 2018-10-30 | 2019-01-25 | 湖南金炉科技股份有限公司 | A kind of cooling segment structure of roller kilns |
-
2015
- 2015-02-02 CN CN201520069811.7U patent/CN204495049U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269296A (en) * | 2018-10-30 | 2019-01-25 | 湖南金炉科技股份有限公司 | A kind of cooling segment structure of roller kilns |
| CN109269296B (en) * | 2018-10-30 | 2024-04-09 | 湖南金炉科技股份有限公司 | Cooling section structure of roller kiln |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 311612 Zhejiang Province Hangzhou Jiande Daciyan Town Yitong Metal Powder Co., Ltd. Patentee after: Hangzhou Yitong New Materials Co., Ltd. Address before: 311612 Zhejiang Province Hangzhou Jiande Daciyan Town Yitong Metal Powder Co., Ltd. Patentee before: Jiande Yitong Metal Powder Co., Ltd. |