CN110487081A - A kind of improved method of dore furnace tertiary-air pipe - Google Patents
A kind of improved method of dore furnace tertiary-air pipe Download PDFInfo
- Publication number
- CN110487081A CN110487081A CN201910933950.2A CN201910933950A CN110487081A CN 110487081 A CN110487081 A CN 110487081A CN 201910933950 A CN201910933950 A CN 201910933950A CN 110487081 A CN110487081 A CN 110487081A
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- Prior art keywords
- tertiary
- air pipe
- furnace
- air
- pipe
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/20—Feeding/conveying devices
- F23K2203/201—Feeding/conveying devices using pneumatic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
- F27D2003/162—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel
- F27D2003/163—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel the fluid being an oxidant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
- F27D2003/162—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel
- F27D2003/165—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel the fluid being a fuel
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
Abstract
The invention discloses a kind of improved methods of dore furnace tertiary-air pipe, improved method is as follows: castable old inside bend for triple air hose is removed, bend for triple air hose position is cut open, tertiary-air pipe enters to decompose fire door moves on the whole, the bend for triple air hose slope that will be cut open in the case where guaranteeing that draught area is constant is made even, and new shell is re-worked；Tertiary-air pipe enters dore furnace vent area and remains unchanged, and whole inside sidesway makes tertiary-air pipe enter furnace；Coal injection pipe of decomposing furnace position is adjusted, a set of coal injection pipe is installed in position below the nearly kiln side coal injection pipe of tertiary-air pipe entrance, and coal dust enters furnace by bottom, and burns；The beneficial effects of the present invention are: blast velocity control reduces the dust stratification of tube bottom in 28-32m/s in the pipe of tertiary-air pipe, increased costs caused by cleaning tube bottom are reduced；Tertiary air enter furnace be changed to it is horizontal directly enter to reduce tertiary air and mixed in dore furnace cone position eddy flow, reduce the position oxygen content, help to reduce denitration ammonia volume.
Description
Technical field
The invention belongs to tertiary-air pipe technical fields, and in particular to a kind of improved method of dore furnace tertiary-air pipe.
Background technique
Dore furnace is a fuel combustion, heat exchange and decomposition reaction while the novel Thermal Equipment carried out；Its type
It is various with form.Basic principle is: in dore furnace and meanwhile feed it is preheated after raw material, a certain amount of fuel and suitable
Hot gas, raw material are in furnace in suspension or fluidized state；At 900 DEG C hereinafter, fuel carries out flameless combustion, while high speed is completed to pass
Heat and carbon stock calcium decomposable process；Time required for the burning time of fuel and Decomposition of Calcium Carbonate about needs 2-4s, at this moment in raw material
The resolution ratio of calcium carbonate can reach 85%-95%, and the temperature after raw material preheating is 800-850 DEG C；It can be used in dore furnace solid
Body, liquid or gaseous fuel, mainly using coal dust as fuel, the fuel that dore furnace is added accounts for about the 55%-65% of whole fuel.
Tertiary air refers to the lack of gas for being sent into burner hearth in the warehouse formula pulverized coal preparation system of pulverized coal carried by hot air by dedicated spout, can be right
Unsegregated a small amount of coal dust is used, and generates heat.The use of tertiary air be unable to do without tertiary-air pipe.Coal when tertiary air contains few
Powder, wind speed is high, has strong immixture to process of coal combustion, and supplement oxygen required for the after-flame stage, due to its wind
Temperature is low, moisture vapor is more, there is the influence for reducing fire box temperature.
Amount of nitrogen oxides height, ammonium hydroxide consumption are big before existing tertiary-air pipe is improved；In order in order to reduce nitrogen oxides, drop
Low ammonium hydroxide consumption, thus it is proposed that a kind of improved method of dore furnace tertiary-air pipe.
Summary of the invention
The purpose of the present invention is to provide a kind of improved methods of dore furnace tertiary-air pipe, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the invention provides the following technical scheme: a kind of improved method of dore furnace tertiary-air pipe,
Improved method is as follows:
Step 1: castable old inside bend for triple air hose is removed, bend for triple air hose position is cut open, and tertiary-air pipe enters
It decomposes fire door to move on the whole, the bend for triple air hose slope that will be cut open in the case where guaranteeing that draught area is constant is made even, again
Process new shell；
Step 2: tertiary-air pipe enters dore furnace vent area and remains unchanged, and whole inside sidesway makes tertiary-air pipe enter furnace；
Step 3: adjustment coal injection pipe of decomposing furnace position, the position installation one below the nearly kiln side coal injection pipe of tertiary-air pipe entrance
Coal injection pipe is covered, coal dust enters furnace by bottom, and burns.
As a preferred technical solution of the invention, in the step 1, old castable inside bend for triple air hose
It removes, bend for triple air hose position is cut open, and tertiary-air pipe enters to decompose fire door moves 65-75cm on the whole.
As a preferred technical solution of the invention, in the step 2, tertiary-air pipe enters dore furnace vent area
It remains unchanged, whole inwardly sidesway 35-45cm.
As a preferred technical solution of the invention, in the step 2, tertiary-air pipe straight line is made to enter furnace.
As a preferred technical solution of the invention, in the step 3, in the nearly kiln side spray coal of tertiary-air pipe entrance
It manages the following position 140-160cm and a set of coal injection pipe is installed.
As a preferred technical solution of the invention, in the step 3, coal dust enters furnace by bottom, and in also Primordial Qi
It burns under atmosphere.
As a preferred technical solution of the invention, blast velocity control is in 28-32m/s in the pipe of the tertiary-air pipe.
Compared with prior art, the beneficial effects of the present invention are:
(1) blast velocity control reduces the dust stratification of tube bottom in 28-32m/s in the pipe of tertiary-air pipe, deposits with traditional tube bottom
Dust is compared, and The present invention reduces the dust stratifications of tube bottom, is reduced the time-consuming of cleaning tube bottom, is improved work efficiency, also reduce
Clean increased costs caused by tube bottom；
(2) tertiary air enter furnace be changed to it is horizontal directly enter to reduce tertiary air and mixed in dore furnace cone position eddy flow, reduce the portion
Position oxygen content；After the nearly kiln side spray coal position of dore furnace moves down simultaneously, part coal dust feeds dore furnace cone position, bores dore furnace
It burns under body region hypoxia, generates reducing atmosphere, form reducing zone, reduce Nox and generate；Help to reduce denitration ammonium hydroxide use
Amount.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of improved method of dore furnace tertiary-air pipe is improved
Method is as follows:
Step 1: castable old inside bend for triple air hose is removed, bend for triple air hose position is cut open, and tertiary-air pipe enters
It decomposes fire door and moves 65cm on the whole, the bend for triple air hose slope that will be cut open in the case where guaranteeing that draught area is constant is made even,
Re-work new shell；
Step 2: tertiary-air pipe enters dore furnace vent area and remains unchanged, and whole inwardly sidesway 35cm keeps tertiary air tangential
Enter furnace and be changed to straight line to enter furnace；
Step 3: adjustment coal injection pipe of decomposing furnace position, the position 140cm is pacified below the nearly kiln side coal injection pipe of tertiary-air pipe entrance
A set of coal injection pipe is filled, coal dust enters furnace by bottom, and burns under reducing atmosphere, reduces Nox production quantity.
In the present embodiment, it is preferred that blast velocity control reduces the dust stratification of tube bottom in 28m/s in the pipe of tertiary-air pipe, with biography
The tube bottom deposition dust of system is compared, and present embodiment reduces the dust stratification of tube bottom, reduces the time-consuming of cleaning tube bottom, improves work
Make efficiency, also reduces increased costs caused by cleaning tube bottom.
Tertiary air enter furnace be changed to it is horizontal directly enter to reduce tertiary air and mixed in dore furnace cone position eddy flow, reduce the position oxygen
Content；After the nearly kiln side spray coal position of dore furnace moves down simultaneously, part coal dust feeds dore furnace cone position, makes dore furnace cone portion
It burns under the hypoxia of position, generates reducing atmosphere, form reducing zone, reduce Nox and generate；Pass through same type production line experience number
According to, it is contemplated that Nox content 15-20% can be reduced, denitration ammonia volume 200kg/h is reduced；It is calculated by operating in rotary kiln year 210 days,
Ammonia volume can be saved every year: * 210 days hours of 200kg*24/1000=1008 tons；By 780 yuan of current ammonium hydroxide procurement price/
Ton, annual escapable cost: 1008*780=786420 member.
Embodiment 2
Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of improved method of dore furnace tertiary-air pipe is improved
Method is as follows:
Step 1: castable old inside bend for triple air hose is removed, bend for triple air hose position is cut open, and tertiary-air pipe enters
It decomposes fire door and moves 70cm on the whole, the bend for triple air hose slope that will be cut open in the case where guaranteeing that draught area is constant is made even,
Re-work new shell；
Step 2: tertiary-air pipe enters dore furnace vent area and remains unchanged, and whole inwardly sidesway 40cm keeps tertiary air tangential
Enter furnace and be changed to straight line to enter furnace；
Step 3: adjustment coal injection pipe of decomposing furnace position, the position 150cm is pacified below the nearly kiln side coal injection pipe of tertiary-air pipe entrance
A set of coal injection pipe is filled, coal dust enters furnace by bottom, and burns under reducing atmosphere, reduces Nox production quantity.
In the present embodiment, it is preferred that blast velocity control reduces the dust stratification of tube bottom in 30m/s in the pipe of tertiary-air pipe, with biography
The tube bottom deposition dust of system is compared, and present embodiment reduces the dust stratification of tube bottom, reduces the time-consuming of cleaning tube bottom, improves work
Make efficiency, also reduces increased costs caused by cleaning tube bottom.
Tertiary air enter furnace be changed to it is horizontal directly enter to reduce tertiary air and mixed in dore furnace cone position eddy flow, reduce the position oxygen
Content；After the nearly kiln side spray coal position of dore furnace moves down simultaneously, part coal dust feeds dore furnace cone position, makes dore furnace cone portion
It burns under the hypoxia of position, generates reducing atmosphere, form reducing zone, reduce Nox and generate；Pass through same type production line experience number
According to, it is contemplated that Nox content 15-20% can be reduced, denitration ammonia volume 200kg/h is reduced；It is calculated by operating in rotary kiln year 210 days,
Ammonia volume can be saved every year: * 210 days hours of 200kg*24/1000=1008 tons；By 780 yuan of current ammonium hydroxide procurement price/
Ton, annual escapable cost: 1008*780=786420 member.
Embodiment 3
Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of improved method of dore furnace tertiary-air pipe is improved
Method is as follows:
Step 1: castable old inside bend for triple air hose is removed, bend for triple air hose position is cut open, and tertiary-air pipe enters
It decomposes fire door and moves 75cm on the whole, the bend for triple air hose slope that will be cut open in the case where guaranteeing that draught area is constant is made even,
Re-work new shell；
Step 2: tertiary-air pipe enters dore furnace vent area and remains unchanged, and whole inwardly sidesway 45cm keeps tertiary air tangential
Enter furnace and be changed to straight line to enter furnace；
Step 3: adjustment coal injection pipe of decomposing furnace position, the position 160cm is pacified below the nearly kiln side coal injection pipe of tertiary-air pipe entrance
A set of coal injection pipe is filled, coal dust enters furnace by bottom, and burns under reducing atmosphere, reduces Nox production quantity.
In the present embodiment, it is preferred that blast velocity control reduces the dust stratification of tube bottom in 32m/s in the pipe of tertiary-air pipe, with biography
The tube bottom deposition dust of system is compared, and present embodiment reduces the dust stratification of tube bottom, reduces the time-consuming of cleaning tube bottom, improves work
Make efficiency, also reduces increased costs caused by cleaning tube bottom.
Tertiary air enter furnace be changed to it is horizontal directly enter to reduce tertiary air and mixed in dore furnace cone position eddy flow, reduce the position oxygen
Content；After the nearly kiln side spray coal position of dore furnace moves down simultaneously, part coal dust feeds dore furnace cone position, makes dore furnace cone portion
It burns under the hypoxia of position, generates reducing atmosphere, form reducing zone, reduce Nox and generate；Pass through same type production line experience number
According to, it is contemplated that Nox content 15-20% can be reduced, denitration ammonia volume 200kg/h is reduced；It is calculated by operating in rotary kiln year 210 days,
Ammonia volume can be saved every year: * 210 days hours of 200kg*24/1000=1008 tons；By 780 yuan of current ammonium hydroxide procurement price/
Ton, annual escapable cost: 1008*780=786420 member.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of improved method of dore furnace tertiary-air pipe, it is characterised in that: improved method is as follows:
Step 1: castable old inside bend for triple air hose is removed, and bend for triple air hose position is cut open, and tertiary-air pipe enters to decompose
Fire door integrally moves up, and the bend for triple air hose slope that will be cut open in the case where guaranteeing that draught area is constant is made even, and re-works
New shell；
Step 2: tertiary-air pipe enters dore furnace vent area and remains unchanged, and whole inside sidesway makes tertiary-air pipe enter furnace；
Step 3: adjustment coal injection pipe of decomposing furnace position, a set of spray is installed in position below the nearly kiln side coal injection pipe of tertiary-air pipe entrance
Coal pipe, coal dust enters furnace by bottom, and burns.
2. a kind of improved method of dore furnace tertiary-air pipe according to claim 1, it is characterised in that: the step 1
In, old castable removes inside bend for triple air hose, and bend for triple air hose position is cut open, and tertiary-air pipe enters to decompose fire door on the whole
Move 65-75cm.
3. a kind of improved method of dore furnace tertiary-air pipe according to claim 1, it is characterised in that: the step 2
In, tertiary-air pipe enters dore furnace vent area and remains unchanged, whole inwardly sidesway 35-45cm.
4. a kind of improved method of dore furnace tertiary-air pipe according to claim 3, it is characterised in that: the step 2
In, so that tertiary-air pipe straight line is entered furnace.
5. a kind of improved method of dore furnace tertiary-air pipe according to claim 1, it is characterised in that: the step 3
In, a set of coal injection pipe is installed in the position 140-160cm below the nearly kiln side coal injection pipe of tertiary-air pipe entrance.
6. a kind of improved method of dore furnace tertiary-air pipe according to claim 5, it is characterised in that: the step 3
In, coal dust enters furnace by bottom, and burns under reducing atmosphere.
7. a kind of improved method of dore furnace tertiary-air pipe according to claim 1, it is characterised in that: the tertiary air
Blast velocity control is in 28-32m/s in the pipe of pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910933950.2A CN110487081A (en) | 2019-09-29 | 2019-09-29 | A kind of improved method of dore furnace tertiary-air pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910933950.2A CN110487081A (en) | 2019-09-29 | 2019-09-29 | A kind of improved method of dore furnace tertiary-air pipe |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204629463U (en) * | 2015-01-20 | 2015-09-09 | 安徽海螺建材设计研究院 | Adopt the new dry process rotary kiln Researched of Air Staging Combustion Burning Pulverized Coal system of denitride technology |
| CN105299625A (en) * | 2015-11-23 | 2016-02-03 | 北京凯盛建材工程有限公司 | Energy conservation and emission reduction modification method for reducing emission load of nitric oxide of DDF decomposing furnace |
| CN205137439U (en) * | 2015-11-24 | 2016-04-06 | 山东卓昶节能科技有限公司 | Oxygendeficient steam hangs down ammonia combustion system |
| CN205191551U (en) * | 2015-12-01 | 2016-04-27 | 天津德诚志成水泥建材技术咨询服务有限公司 | Hierarchical low -nitrogen combustion equipment of wind coal charge |
| CN206858496U (en) * | 2017-04-19 | 2018-01-09 | 北京绿岩环保科技有限责任公司 | A kind of activating and reducing combustion with meagre oxygen system |
-
2019
- 2019-09-29 CN CN201910933950.2A patent/CN110487081A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204629463U (en) * | 2015-01-20 | 2015-09-09 | 安徽海螺建材设计研究院 | Adopt the new dry process rotary kiln Researched of Air Staging Combustion Burning Pulverized Coal system of denitride technology |
| CN105299625A (en) * | 2015-11-23 | 2016-02-03 | 北京凯盛建材工程有限公司 | Energy conservation and emission reduction modification method for reducing emission load of nitric oxide of DDF decomposing furnace |
| CN205137439U (en) * | 2015-11-24 | 2016-04-06 | 山东卓昶节能科技有限公司 | Oxygendeficient steam hangs down ammonia combustion system |
| CN205191551U (en) * | 2015-12-01 | 2016-04-27 | 天津德诚志成水泥建材技术咨询服务有限公司 | Hierarchical low -nitrogen combustion equipment of wind coal charge |
| CN206858496U (en) * | 2017-04-19 | 2018-01-09 | 北京绿岩环保科技有限责任公司 | A kind of activating and reducing combustion with meagre oxygen system |
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