CN201621692U - Special chromium residue dry-detoxification pulverized coal burner and rotary kiln assorted with same - Google Patents
Special chromium residue dry-detoxification pulverized coal burner and rotary kiln assorted with same Download PDFInfo
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- CN201621692U CN201621692U CN2010201255062U CN201020125506U CN201621692U CN 201621692 U CN201621692 U CN 201621692U CN 2010201255062 U CN2010201255062 U CN 2010201255062U CN 201020125506 U CN201020125506 U CN 201020125506U CN 201621692 U CN201621692 U CN 201621692U
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Abstract
The utility model discloses a special chromium residue dry-detoxification pulverized coal burner, which comprises a burner body and swirl vanes, wherein the burner body consists of a pulverized coal passage and a nozzle, and the swirl vanes are disposed in the pulverized coal passage. A telescopic tubular straight tube rectification section is sleeved in the nozzle and provided with a slide block, the nozzle provided with a long guide groove is a conical nozzle with an angle ranging from 5 degrees to 10 degrees, and the slide block penetrates through the long guide groove. The length of the straight tube rectification section is adjustable, the conical nozzle can effectively gather flames, and then the special chromium residue dry-detoxification pulverized coal burner can greatly shorten sooting flame, quickly form reduced flame and guarantee the chromium residue rotary kiln dry-detoxification technique to be high in quality and efficiency and low in consumption on a condition that reduction calcination combustion air is lower in temperature.
Description
Technical field:
The utility model belongs to environmental protection and toxic waste is administered the field, is specifically related to special-purpose coal burner in a kind of chromic slag dry method detoxication technology.
Background technology:
Chromium slag rotary kiln is dry detoxified, is to utilize rotary kiln and supporting with it cooling device, through reduction calcining and cooling, changes Cr VI poisonous in the chromium slag into nontoxic trivalent chromium.Original chromium slag rotary kiln is dry detoxified all to be equipment and the flow processs that adopt original chromium salt production line, water spray cooling in cooler.Because coal burner is not made corresponding transformation, make the reduction calcining a series of problems that are unfavorable for product yield, quality and hear rate occur.
Corresponding original chromium salt production line, under the oxidizing roasting condition, combustion air is in cooling products, and wind-warm syndrome increases substantially.For as much as possible secondary wind that utilize high temperature, to cut down the consumption of energy, the general comparatively structure of complexity that adopts of existing coal powder injection pipe under the prerequisite that guarantees wind coal mixing quality, reduces the use amount of a wind as far as possible more.Because the raising of the wind-warm syndrome of secondary wind, improved the burning condition of coal powder in kiln head, therefore not high for the requirement of coal dust and Air mixing.But when this coal powder injection pipe is used to reduce calcine technology, because the combustion air wind-warm syndrome is lower, make coal dust not satisfactory with mixing of combustion air, ignition point is postponed, black duration and degree of heating (the coal powder injection pipe mouth of pipe is to the distance of flame root) prolongs, and causing reduced chromium slag is not to contact with the reduction flame that is reducing condition at kilneye, but with the contacting of the coal dust that is the state of oxidation and combustion air mixture long period, cause reduced chromium slag to strengthen oxidation potential, cause the decline of chromium residue detoxifying effect at kilneye.The prolongation of the black duration and degree of heating of the coal burner salband in the rotary kiln that also extended has compressed the useful space of rotary kiln reduction calcining, has reduced the output of chromium residue detoxifying production line.
The utility model content:
The utility model provides the special-purpose reduction of a kind of improved chromic slag dry method detoxication coal powder injection pipe at this problem, and its technical scheme is as follows:
The special-purpose coal burner of the utility model chromic slag dry method detoxication comprises: the burner body of being made up of coal dust passage and nozzle and place the interior swirl vane of coal dust passage is characterized in that suit one telescopic cylindrical straight tube rectification section in nozzle.
In described coal burner, on the straight tube rectification section slide block is set, offer microscler guide groove on the nozzle, slide block is arranged in this microscler guide groove.
In described coal burner, the nozzle of burner body is 5-10 ° a cone spout.
In addition, propose the supporting rotary kiln of a kind of and described coal burner, comprise kiln body and kiln hood, it is characterized in that the end face of described kiln hood refractory material is built 5-10 ° taper reducing by laying bricks or stones, the diameter of reducing is the 65-90% of kiln effective diameter.
Owing to adopted technique scheme, the utlity model has following advantage:
1, owing to strengthened primary air flow and increased swirl vane in the burner, relies on bigger primary air flow and bigger radially wind speed, improved mixing of combustion air and coal dust, help shortening black duration and degree of heating (the burner front end face is to the distance of flame root);
2, increase cone angle reducing and adjustable straight tube rectification section of coal burner head, can keep the Reasonable Shape of flame, prevent the ablation of the flame too dispersed for the kiln hood refractory material.
The utility model is owing to the length of straight tube rectification section can be regulated, and the cone spout effectively draws in flame, can be under the lower condition of the combustion-supporting wind-warm syndrome of reduction calcining, shorten black duration and degree of heating greatly, form reduction flame fast, guarantee high-quality, the efficient and low consumption of the dry detoxified technology of chromium slag rotary kiln.
Description of drawings:
Fig. 1 is the structure chart according to the special-purpose coal burner of chromic slag dry method detoxication of the present utility model.
Fig. 2 is the structure chart of observing along the A direction among Fig. 1 according to the special-purpose reduction of chromic slag dry method detoxication of the present utility model coal powder injection pipe.
The specific embodiment:
As depicted in figs. 1 and 2, the special-purpose coal burner of chromic slag dry method detoxication of the present utility model comprises burner body 1, swirl vane 2 and straight tube rectification section 3, wherein:
Burner body 1 comprises coal dust path 10 and nozzle 12 along wind upstream a to downstream, and the coal dust path 10 is connected with the coal, pulverulent fuel mixer of being made up of clean wind reducing and coal dust import (Fig. 1 right side), is used to introduce coal dust and combustion air;
Straight tube rectification section 3 is the ad hoc parts of the utility model, it becomes tubular, be sleeved in the nozzle 12, fix a slide block 31 on the straight tube rectification section 3, offer a microscler guide groove 13 on the nozzle 12, by the slip of slide block 31 in guide groove 13, straight tube rectification section 3 can stretch in nozzle 12 to adjust the length of coal burner bocca.
In the reduction calcination process, do not have the secondary combustion air of high temperature to utilize, reduce primary air flow with energy-conservation nonsensical, therefore, in the utility model in the past the 10-15% of combustion air volume be promoted to the 30-70% of combustion air volume significantly.Correspondingly, the coal dust path 10 adopts the thick circular tube structure of burner that uses on the general chromic salts rotary kiln, and the also expansion thereupon of the diameter of clean wind reducing and nozzle 12, so that adapt to the primary air flow that significantly promotes.
Under the condition that strengthens primary air flow, the flame degree of divergence will strengthen, may jeopardize the service life of kiln hood refractory material, therefore, can make straight tube rectification section 3 flexible in nozzle 12 by slide block 31 and guide groove 13, and nozzle 12 is designed to 5-10 ° spout cone (conical surface is 5-10 ° with axial angle),, dispersing of flame is effectively regulated and controlled so that flame is effectively drawn in.
Supporting with this kind coal burner, the kiln hood refractory material of rotary kiln will be built 5-10 ° taper reducing at end face by laying bricks or stones, and the diameter of reducing is the 65-90% of kiln effective diameter, the heat accumulating sections of facilitating the burner premature fire with formation.The Long contact time of low temperature combustion air and high temperature reduction chromium slag has been avoided in the taper reducing, and has shifted to an earlier date the ignition point of coal dust.
Utilize the special-purpose coal burner of chromic slag dry method detoxication of the present utility model, owing to adopted the version of optimizing, can be under normal temperature condition, significantly shorten black duration and degree of heating (the burner front end face is to the distance of flame root), therefore can the air of oxidizing atmosphere and the mixture of coal dust will be substantially, be converted into fast and contain a certain amount of CO, be the flame of reducing atmosphere substantially, thereby effectively improve the condition of the reduction calcining in the chromium slag rotary kiln detoxification processes, simultaneously also by a relatively large margin the raising system throughput and reduce hear rate, the power consumption of system.
Claims (4)
1. the special-purpose coal burner of a chromic slag dry method detoxication comprises: the burner body of being made up of coal dust passage and nozzle and place the interior swirl vane of coal dust passage is characterized in that suit one telescopic cylindrical straight tube rectification section in nozzle.
2. the special-purpose coal burner of chromic slag dry method detoxication as claimed in claim 1 is characterized in that, on the described straight tube rectification section slide block is set, and offers microscler guide groove on the described nozzle, and slide block is arranged in this microscler guide groove.
3. the special-purpose coal burner of chromic slag dry method detoxication as claimed in claim 1 or 2 is characterized in that the nozzle of described burner body is 5-10 ° a cone spout.
One kind with the supporting rotary kiln of the special-purpose coal burner of the described chromic slag dry method detoxication of claim 3, comprise kiln body and kiln hood, it is characterized in that the end face of described kiln hood refractory material is built 5-10 ° taper reducing by laying bricks or stones, the diameter of reducing is the 65-90% of kiln effective diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201255062U CN201621692U (en) | 2010-03-08 | 2010-03-08 | Special chromium residue dry-detoxification pulverized coal burner and rotary kiln assorted with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201255062U CN201621692U (en) | 2010-03-08 | 2010-03-08 | Special chromium residue dry-detoxification pulverized coal burner and rotary kiln assorted with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201621692U true CN201621692U (en) | 2010-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201255062U Expired - Fee Related CN201621692U (en) | 2010-03-08 | 2010-03-08 | Special chromium residue dry-detoxification pulverized coal burner and rotary kiln assorted with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201621692U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456549A (en) * | 2014-11-12 | 2015-03-25 | 宁夏嘉翔自控技术有限公司 | Nozzle of pulverized coal burner of magnesium metal reduction furnace |
| CN115493143A (en) * | 2022-09-13 | 2022-12-20 | 北京泷涛环境科技有限公司 | Ultralow-nitrogen combustion device of natural gas boiler and use method thereof |
-
2010
- 2010-03-08 CN CN2010201255062U patent/CN201621692U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456549A (en) * | 2014-11-12 | 2015-03-25 | 宁夏嘉翔自控技术有限公司 | Nozzle of pulverized coal burner of magnesium metal reduction furnace |
| CN115493143A (en) * | 2022-09-13 | 2022-12-20 | 北京泷涛环境科技有限公司 | Ultralow-nitrogen combustion device of natural gas boiler and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101103 Termination date: 20180308 |