CN110252097A - A kind of aluminium stone kiln breaks key denitration device and method of denitration - Google Patents
A kind of aluminium stone kiln breaks key denitration device and method of denitration Download PDFInfo
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- CN110252097A CN110252097A CN201910679972.0A CN201910679972A CN110252097A CN 110252097 A CN110252097 A CN 110252097A CN 201910679972 A CN201910679972 A CN 201910679972A CN 110252097 A CN110252097 A CN 110252097A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
-
- 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
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention discloses a kind of aluminium stone kilns to break key denitration device and method of denitration, including aluminium stone kiln, aluminium stone kiln outer wall upper and lower part is connected with flue, fresh air pipeline respectively, and smoke backflow pipeline is connected on flue, and wind-mixer is arranged in smoke backflow pipeline and fresh air pipeline intersection；Flue end connects desulphurization denitration deduster one, catcher, desulphurization denitration deduster two, desulphurization denitration deduster one, two sewage draining exit of desulphurization denitration deduster and circulatory pool connection, two air outlet connection water mist separator of desulfurization and dedusting reaction kettle, water mist separator wind pipe is connect with chimney, it further include tank used for storing ammonia, the broken key machine of nitrogen oxides, wherein nitrogen oxides breaks key machine upper end and is equipped with pipe-line mixer, and pipe-line mixer passes through the fume high-temperature area connection of mixing duct and aluminium stone kiln；Tank used for storing ammonia by for ammonia pump and pipe-line mixer connection for ammonia.The entire simple process of the present invention, scrap build is low in cost, and denitration efficiency is high, fully meets environmental requirement.
Description
Technical field:
The present invention relates to field of environment protection equipment more particularly to a kind of aluminium stone kiln to break key denitration device and method of denitration.
Background technique:
National stove carries out minimum discharge transformation within 2019.New rule boiler emission limit specific requirement: soot dust granule object
10mg/m3, sulfur dioxide 20mg/m3, nitrogen oxides 50mg/m3, stove is the equipment that present stove industry all generallys use, this
Kind of stove is unenclosed construction, and stove feeds from front, behind discharge, center is high-temperature region, causes flue gas oxygen content super in this way
It marks (18%), also, calcination process is also open type, control flue gas oxygen content is extremely important.
China's stove energy consumption accounts for industrial energy consumption and accounts for about 1/3, and the stove thermal efficiency that is averaged is lower by 20% or so than external, national
If the average energy conservation 10% of industrial furnace, the energy of saving is equivalent to 100,000,000 tons of standard coals.Furnace flue gas discharge uses conventional cloth bag
Dedusting, desulfurizing tower, nitrogen oxide emission are generally being much larger than 50mg/m3, conventional cloth bag dedusting, desulfurizing tower, SCR, SNCR are de-
Nitre method is helpless, is unable to reach high efficiency denitration index.
Therefore, for stove minimum discharge transformation project particularity, complete set renovation technique scheme is designed.
Summary of the invention:
In order to make up the deficiency of prior art problem, the object of the present invention is to provide a kind of aluminium stone kiln break key denitration device and
Method of denitration after aluminium stone kiln is mixed and burned by fresh air, low nitrogen wind, breaks key machine in aluminium stone kiln for ammonia cooperation nitrogen oxides for ammonia pump
Fume high-temperature area denitrating flue gas, most afterwards through subsequent denitrating technique, simple process, scrap build is low in cost, and denitration efficiency is high.
Technical scheme is as follows:
Aluminium stone kiln breaks key denitration device, including aluminium stone kiln, and aluminium stone kiln outer wall upper and lower part is connected with flue, fresh wind tube respectively
Road, fresh air pipeline end air blower, which is characterized in that smoke backflow pipeline, smoke backflow pipeline are connected on the flue
On smoke backflow air-introduced machine is installed, wind-mixer is arranged in smoke backflow pipeline and fresh air pipeline intersection；
Flue end connects desulphurization denitration deduster one, catcher, desulphurization denitration deduster two, desulphurization denitration deduster
One, two sewage draining exit of desulphurization denitration deduster and circulatory pool connection, two air outlet connection water mist separator of desulfurization and dedusting reaction kettle, water
Mist separator wind pipe is connect with chimney, is equipped with air-introduced machine on water mist separator wind pipe；
Further include the tank used for storing ammonia being arranged between aluminium stone kiln furnace and desulphurization denitration deduster one, nitrogen oxides break key machine,
Wherein nitrogen oxides breaks key machine upper end and is equipped with pipe-line mixer, and pipe-line mixer is high by the flue gas of mixing duct and aluminium stone kiln
Warm area connection；The tank used for storing ammonia by for ammonia pump and pipe-line mixer connection for ammonia.
The aluminium stone kiln breaks key denitration device, which is characterized in that the desulphurization denitration deduster two and water mist separation
Desulfurization filter net device is also linked between device, desulfurization filter net device link position is located at desulphurization denitration deduster two and water mist separation
Device middle and upper part.
The aluminium stone kiln breaks key denitration device, which is characterized in that it is described for ammonia pump and pipe-line mixer connection for ammonia,
It is vertical with medium emission direction in the broken key machine of nitrogen oxides that ammonium hydroxide enters pipe-line mixer direction.
The aluminium stone kiln breaks key denitration device, which is characterized in that the fume high-temperature zone position of the aluminium stone kiln is in ring
Shape is evenly distributed with multiple nozzles, and nozzle sprays medical fluid and covers entire aluminium stone kiln sectional area.
The aluminium stone kiln breaks key denitration device, which is characterized in that and the nitrogen oxides breaks in key machine and medium is added, and
When the pressure that the nitrogen oxides breaks key machine is 0.6MPa, temperature is 220 DEG C.
The aluminium stone kiln breaks key denitration device, which is characterized in that the medium is softened water and foaming agent, and foaming agent is
Denitration common foaming, and the ratio of foaming agent and water is 1/10000~1.5/10000.
The aluminium stone kiln breaks key denitration device, which is characterized in that the tank used for storing ammonia is that the plastics of polyethylene material store up
Tank.
The aluminium stone kiln breaks key denitration device, which is characterized in that the polyethylene is rotation molding polyethylene plastics.
The aluminium stone kiln breaks the method for denitration of key denitration device, which comprises the steps of:
1), debugging and detection system fault-free, each link of starting device are adjusted into fresh-air volume, smoke backflow amount, mix
The mixing wind air output of wind device, it is 100% that mixed air volume, which controls valve opening, the aperture of fresh-air volume regulating valve is 70%~
85%, the aperture of smoke backflow adjustable valve is 15%~50%；
2), each equipment of system operates normally, and cooperates the variable frequency adjustment of air blower, smoke backflow air-introduced machine, it is ensured that flue gas
Regurgitant volume and fresh-air volume are according to 18%-32% ratio；
3), starting is carried out towards pipe-line mixer for ammonia for ammonia pump；
4), nitrogen oxides breaks in key machine and medium is added, and starts the temperature-pressure device that nitrogen oxides breaks key machine, works as pressure
Reach 0.5MPa, temperature reaches 200 DEG C, and medium enters pipe-line mixer by pipeline, and medium enters pipeline lag and supplies for ammonia pump
1~3S of ammonia enters the fume high-temperature area of aluminium stone kiln after pipe-line mixer mixing；
5), medium is softened water and foaming agent in step 4), and foaming agent is denitration common foaming, ratio foaming agent: water
=(0.8~2): (9000~10000)；
6) after, aluminium stone kiln is mixed and burned by fresh air, low nitrogen wind, key machine is broken for ammonia cooperation nitrogen oxides using for ammonia pump
In the fume high-temperature area denitrating flue gas of aluminium stone kiln, enters follow-up link finally along flue, eventually enter into smoke stack emission；
7), the sensor with nitrogen oxides detection NOx component concentration in chimney, sensor acquire data feedback to DCS
The controller of control system is lower than 45mg/m through detection through detection discharged nitrous oxides3。
The invention has the advantages that
1, after aluminium stone kiln of the present invention is mixed and burned by fresh air, low nitrogen wind, effective denitration is carried out in the burning primary stage,
On the one hand the low nitrogen wind that smoke backflow pipeline provides can preheat fresh air, on the other hand reducing aluminium stone kiln oxygen content has energy conservation effect
Fruit reduces the generation of nitrogen oxides simultaneously；
2, the present invention breaks key machine in the fume high-temperature area denitrating flue gas of aluminium stone kiln, in aluminium for ammonia cooperation nitrogen oxides for ammonia pump
Denitration in stone kiln reduces nitrogen oxides in effluent of coming out of the stove again；
3, aluminium stone kiln of the present invention enters chimney, entire simple process, scrap build by flue after subsequent denitration link
Low in cost, denitration efficiency is high；
4, in addition, the present invention also has excellent desulfurization, dedusting link, short time limit is transformed in whole equipment, and operating cost is low,
Small investment is compared with tradition, short time limit 70%, operating cost decline 60~80%.
Detailed description of the invention:
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is aluminium stone kiln fume high-temperature area of the present invention arrangement of nozzles figure.
Specific embodiment:
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Referring to attached drawing 1, aluminium stone kiln breaks key denitration device, including aluminium stone kiln 1, and 1 outer wall upper and lower part of aluminium stone kiln is connected with respectively
Flue 2, fresh air pipeline 3,3 end air blower 4 of fresh air pipeline are connected with smoke backflow pipeline 5, smoke backflow pipeline 5 on flue 2
On smoke backflow air-introduced machine 6 is installed, wind-mixer 7 is arranged in smoke backflow pipeline 5 and 3 intersection of fresh air pipeline, and guarantee ensures back
Stream flue gas is uniformly mixed with fresh air.
2 end of flue connects desulphurization denitration deduster 1, catcher 9, desulphurization denitration deduster 2 10, and desulphurization denitration removes
11 connection of dirt device 1,2 10 sewage draining exit of desulphurization denitration deduster and circulatory pool, 2 10 air outlet connection water of desulfurization and dedusting reaction kettle
Mist separator 12,12 wind pipe of water mist separator are connect with chimney 13, are equipped with air inducing on 12 wind pipe of water mist separator
Machine 14.
It further include the tank used for storing ammonia 15 being arranged between aluminium stone kiln furnace 1 and desulphurization denitration deduster 1, the broken key of nitrogen oxides
Machine 16, wherein nitrogen oxides breaks 16 upper end of key machine and is equipped with pipe-line mixer 17, pipe-line mixer 17 by mixing duct 18 with
The fume high-temperature area connection of aluminium stone kiln；Tank used for storing ammonia 14 by for ammonia pump 19 and 17 connection of pipe-line mixer for ammonia.
According to one embodiment, nitrogen oxides, which is broken in key machine 10, medium, and starts the heating that nitrogen oxides breaks key machine 10
Pressurizing device, when pressure reaches 0.6MPa, temperature reaches 220 DEG C；Medium is softened water and foaming agent, and foaming agent is common for denitration
Ratio=1/10000~1.5/10000 of foaming agent, foaming agent and water.
Since ammonium hydroxide is alkaline reaction, there is strong corrosivity, strong to metal protections such as copper, aluminium, iron, ammonium hydroxide is to eyes
There is the stimulation detrimental effect arranged by force with human bodies mucous membranes such as respiratory tracts.Therefore, in the embodiments of the present disclosure, ammonium hydroxide can use polyethylene
The plastic storage tank of material is stored.Rotation molding polyethylene plastic storage tank, material material performance is excellent, plastic storage tank object produced
Reason and chemical property are excellent, and using international advanced rotational moulding one-shot forming technique, bulky, sealability is good, and storage ammonium hydroxide is complete
It can satisfy requirement entirely.
Desulfurization filter net device 20, desulfurization filter net device are also linked between desulphurization denitration deduster 2 10 and water mist separator
20 link positions are located at desulphurization denitration deduster 2 10 and 12 middle and upper part of water mist separator.
Referring to attached drawing 2, for ammonia pump 19 and 17 connection of pipe-line mixer for ammonia, ammonium hydroxide enters 17 direction of pipe-line mixer and nitrogen
It is vertical that oxide breaks medium emission direction in key machine 16.
The fume high-temperature zone position of aluminium stone kiln 1 is evenly distributed with multiple nozzles 21 in a ring, and nozzle 21 sprays medical fluid covering
Entire aluminium stone kiln sectional area.
Aluminium stone kiln breaks the method for denitration of key denitration device, includes the following steps:
1), debugging and detection system fault-free, each link of starting device are adjusted into fresh-air volume, smoke backflow amount, mix
The mixing wind air output of wind device 7, it is 100% that mixed air volume, which controls valve opening, the aperture of fresh-air volume regulating valve is 70%~
85%, the aperture of smoke backflow adjustable valve is 15%~50%, and each valve belongs to conventional design in each pipeline；
2), each equipment of system operates normally, and cooperates the variable frequency adjustment of air blower, smoke backflow air-introduced machine, it is ensured that flue gas
Regurgitant volume and fresh-air volume are according to 18%-32% ratio；
3), starting is carried out towards pipe-line mixer for ammonia for ammonia pump；
4), nitrogen oxides breaks in key machine and medium is added, and starts the temperature-pressure device that nitrogen oxides breaks key machine, works as pressure
Reach 0.5MPa, temperature reaches 200 DEG C, and medium enters pipe-line mixer by pipeline, and medium enters pipeline lag and supplies for ammonia pump
1~3S of ammonia enters the fume high-temperature area of aluminium stone kiln after pipe-line mixer mixing；
5), medium is softened water and foaming agent in step 4), and foaming agent is denitration common foaming, ratio foaming agent: water
=(0.8~2): (9000~10000)；
6) after, aluminium stone kiln is mixed and burned by fresh air, low nitrogen wind, key machine is broken for ammonia cooperation nitrogen oxides using for ammonia pump
In the fume high-temperature area denitrating flue gas of aluminium stone kiln, enters follow-up link finally along flue, eventually enter into smoke stack emission；
7), the sensor with nitrogen oxides detection NOx component concentration in chimney 13, sensor belong to the prior art, mesh
Preceding common detection means, sensor acquire data feedback to the controller of DCS control system, through detection discharged nitrous oxides through examining
It surveys and is lower than 45mg/m3。
Preferable specific embodiment of the invention is described in detail above.It should be appreciated that those skilled in the art
It according to the present invention can conceive without creative work and make many modifications and variations.Therefore, all skills in the art
Art personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be within the scope of protection determined by the claims.
Claims (9)
1. a kind of aluminium stone kiln breaks key denitration device, including aluminium stone kiln, aluminium stone kiln outer wall upper and lower part is connected with flue, fresh air respectively
Pipeline, fresh air pipeline end air blower, which is characterized in that smoke backflow pipeline, smoke backflow pipe are connected on the flue
Smoke backflow air-introduced machine is installed, wind-mixer is arranged in smoke backflow pipeline and fresh air pipeline intersection on road；
Flue end connects desulphurization denitration deduster one, catcher, desulphurization denitration deduster two, and desulphurization denitration deduster one takes off
Two sewage draining exit of sulphur denitration dust collecting device and circulatory pool connection, two air outlet connection water mist separator of desulfurization and dedusting reaction kettle, water mist point
It is connect from device wind pipe with chimney, air-introduced machine is installed on water mist separator wind pipe；
Further include the tank used for storing ammonia being arranged between aluminium stone kiln furnace and desulphurization denitration deduster one, nitrogen oxides break key machine, wherein
Nitrogen oxides breaks key machine upper end and is equipped with pipe-line mixer, and pipe-line mixer passes through the fume high-temperature area of mixing duct and aluminium stone kiln
Connection；The tank used for storing ammonia by for ammonia pump and pipe-line mixer connection for ammonia.
2. aluminium stone kiln according to claim 1 breaks key denitration device, which is characterized in that the desulphurization denitration deduster two
Desulfurization filter net device is also linked between water mist separator, desulfurization filter net device link position is located at desulphurization denitration deduster two
With water mist separator middle and upper part.
3. aluminium stone kiln according to claim 1 breaks key denitration device, which is characterized in that described to be mixed for ammonia pump with pipeline
For device connection for ammonia, it is vertical with medium emission direction in the broken key machine of nitrogen oxides that ammonium hydroxide enters pipe-line mixer direction.
4. aluminium stone kiln according to claim 1 breaks key denitration device, which is characterized in that the fume high-temperature of the aluminium stone kiln
Zone position is evenly distributed with multiple nozzles in a ring, and nozzle sprays medical fluid and covers entire aluminium stone kiln sectional area.
5. aluminium stone kiln according to claim 1 breaks key denitration device, which is characterized in that the nitrogen oxides, which is broken in key machine, to be added
Enter medium, and when the pressure that the nitrogen oxides breaks key machine is 0.6MPa, temperature is 220 DEG C.
6. aluminium stone kiln according to claim 5 breaks key denitration device, which is characterized in that the medium is softened water and foaming
Agent, foaming agent is denitration common foaming, and the ratio of foaming agent and water is 1/10000~1.5/10000.
7. aluminium stone kiln according to claim 1 breaks key denitration device, which is characterized in that the tank used for storing ammonia is polyethylene material
The plastic storage tank of matter.
8. aluminium stone kiln according to claim 7 breaks key denitration device, which is characterized in that the polyethylene is rotation molding polyethylene
Plastics.
9. the method for denitration that a kind of aluminium stone kiln as described in any one of claim 1~8 breaks key denitration device, which is characterized in that packet
Include following steps:
1), debugging and detection system fault-free, each link of starting device are adjusted into fresh-air volume, smoke backflow amount, wind-mixer
Mixing wind air output, it is 100% that mixed air volume, which controls valve opening, and the aperture of fresh-air volume regulating valve is 70%~85%, cigarette
The aperture of gas reflux adjustable valve is 15%~50%；
2), each equipment of system operates normally, and cooperates the variable frequency adjustment of air blower, smoke backflow air-introduced machine, it is ensured that smoke backflow
Amount and fresh-air volume are according to 18%-32% ratio；
3), starting is carried out towards pipe-line mixer for ammonia for ammonia pump；
4), nitrogen oxides breaks in key machine and medium is added, and starts the temperature-pressure device that nitrogen oxides breaks key machine, when pressure reaches
0.5MPa, temperature reach 200 DEG C, and medium enters pipe-line mixer by pipeline, medium enter pipeline lag for ammonia pump for ammonia 1~
3S enters the fume high-temperature area of aluminium stone kiln after pipe-line mixer mixing；
5), in step 4) medium be softened water and foaming agent, foaming agent be denitration common foaming, ratio foaming agent: water=
(0.8~2): (9000~10000)；
6) after, aluminium stone kiln is mixed and burned by fresh air, low nitrogen wind, key machine is broken in aluminium for ammonia cooperation nitrogen oxides using for ammonia pump
The fume high-temperature area denitrating flue gas of stone kiln, enters follow-up link finally along flue, eventually enters into smoke stack emission；
7), the sensor with nitrogen oxides detection NOx component concentration in chimney, sensor acquire data feedback and control to DCS
The controller of system is lower than 45mg/m through detection through detection discharged nitrous oxides3。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696663A (en) * | 2020-12-29 | 2021-04-23 | 四川省洪雅青衣江元明粉有限公司 | Method for controlling low-nitrogen combustion of boiler |
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