CN208765514U - A kind of enclosed kiln high-temperature flue gas denitrification apparatus - Google Patents
A kind of enclosed kiln high-temperature flue gas denitrification apparatus Download PDFInfo
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- CN208765514U CN208765514U CN201821228913.9U CN201821228913U CN208765514U CN 208765514 U CN208765514 U CN 208765514U CN 201821228913 U CN201821228913 U CN 201821228913U CN 208765514 U CN208765514 U CN 208765514U
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- denitrfying agent
- flue gas
- denitrification apparatus
- feeding device
- filtering tank
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Abstract
The utility model belongs to environmentally friendly fume treatment technical field, more particularly to a kind of enclosed kiln high-temperature flue gas denitrification apparatus, described device includes: air compressor machine (1), filtering tank (2), denitrfying agent metering feeding device (3), denitrfying agent feed bin (5), crushing device (6), thermocouple (7)；Wherein, the air compressor machine (1) is connected to filtering tank (2), the filtering tank (2) is connected to denitrfying agent metering feeding device (3), the denitrfying agent metering feeding device (3) is connected to denitrfying agent feed bin (5), it include crushing device (6) that the thermocouple (7) is inserted in the quirk (4) of enclosed kiln in the denitrfying agent feed bin (5).The utility model realizes denitrating flue gas, NOx content in flue gas is effectively reduced, system run all right, flue gas qualified discharge is, it can be achieved that minimum discharge.
Description
Technical field
The utility model belongs to environmentally friendly fume treatment technical field, and in particular to a kind of enclosed kiln high-temperature flue gas denitration dress
It sets.
Background technique
With the rapid development of social economy, Air Pollutants Emissions can not have always been high any more, NOxIt is more tight to pollute situation
It is high, the high-temperature flue gas NO of kiln dischargexContent is high, and NOxDamage to environment is very big, it is both the main matter to form acid rain
One of, and form the important substance of haze and an important factor of consumption ozone.To reduce pollutant emission, country is to work
Industry kiln proposes specific emission reduction requirement.
The selective catalytic reduction method SCR of existing common flue-gas denitration process, selective non-catalytic reduction method SNCR, also
Former agent is liquefied ammonia, ammonium hydroxide, urea decomposing solution, and principle is all using reducing agent NH3With NOxReduction reaction occurs and generates N2
Reach denitration purpose.Using selective catalytic reduction SCR, there are the impurity such as tar, dust to be adhered to catalyst surface in flue gas
It causes catalyst failure and increases system resistance；It less than 50% and is sprayed into using selective non-catalytic reduction method SNCR denitration efficiency
A large amount of water influences energy consumption and equipment safety operation, and the escaping of ammonia is serious, and crystal blocking flue and corrosion occurs in flue low-temperature space
Equipment.
To solve the problems, such as that above-mentioned enclosed kiln high-temperature flue gas denitration exists, while responding wanting for national environmental protection policy discharge
It asks, in conjunction with smoke components and impurity content feature, is examined from factors such as technical feasibility, economic rationality and operations steady in a long-term
Consider, it is theoretically feasible using SNCR denitration technology using furnace internal-quirk as Benitration reactor.It is strong by using reducing property
Denitrfying agent it is more to be improved according to the suitable spray regime of furnace construction feature selecting for mixed effect for improving flue gas and denitrfying agent etc.
Kind means try to improve the reaction efficiency of reducing agent, in the current still blank of the gas denitrifying technologies such as non-electrical industry kiln, do not have
Mature application case and denitration technology is current non-electrical industry kiln gas qualified discharge, clean manufacturing is urgently to be solved asks
Topic.
Utility model content
Non-electrical industry kiln gas denitration there are aiming at the problem that, the purpose of the utility model is to provide a kind of encloseds
Kiln high-temperature flue gas denitrification apparatus.
In order to achieve the above objectives, the utility model uses the following technical solution:
A kind of enclosed kiln high-temperature flue gas denitrification apparatus provided by the utility model, described device includes: air compressor machine 1, mistake
Filter tank 2, denitrfying agent metering feeding device 3, denitrfying agent feed bin 5, crushing device 6, thermocouple 7；
Wherein, the air compressor machine 1 is connected to filtering tank 2, and the filtering tank 2 is connected to denitrfying agent metering feeding device 3, institute
The quirk 4 that denitrfying agent metering feeding device 3 is connected to enclosed kiln is stated, the denitrfying agent metering feeding device 3 is connected to denitration
Agent feed bin 5, the interior denitrfying agent feed bin 5 includes crushing device 6, and the thermocouple 7 is inserted in the quirk 4 of enclosed kiln.
Wherein, air compressor machine 1 conveys power as denitrfying agent for providing compressed air；Filtering tank 2 is empty for excluding compression
The moisture of gas；Denitrfying agent metering feeding device 3 controls denitration agent flux for adjusting feed revolving speed；The quirk 4 of enclosed kiln
Denitration is realized for reduction reaction to occur；Denitrfying agent feed bin 5 is used for the interim storeroom of denitrfying agent；Crushing device 6 is for revolving
Broken and loose denitrfying agent prevents from agglomerating during turning；Thermocouple 7 is used to detect the temperature of the quirk 4 of enclosed kiln.
Denitrfying agent metering feeding device 3 described in the utility model is gear structure, passes through stepper motor or frequency converter tune
Whole gear rotational speed p realizes the adjustment of denitration agent flux Q, wherein Q=cp, c are constant, i.e. the discharge quantity of the every rotation one week of gear,
P is gear rotational speed.
Filtering tank 2 described in the utility model is closed structure tank body, and slag-drip opening arranged at bottom, inside sieve, orifice plate as
Filter medium perhaps uses electrostatic precipitation as slagging-off medium or uses molecular sieve, active carbon etc. as adsorbing medium.
Crushing device 6 described in the utility model is mounted in denitrfying agent feed bin 5, crushing device power useable electric moter, electricity
Magnetic, compressed air etc. do power, connecting rod spring shock absorption noise reduction, quartering hammer and connecting rod Hard link, drive quartering hammer swing crushing
The denitrfying agent of agglomeration.
Denitrification apparatus described in the utility model further includes PLC rack 8, wherein PLC rack 8 judgement regulation denitrfying agent measure to
The revolving speed of device 3 is expected to adjust denitration agent flux, and PLC rack 8 includes field control cabinet, middle control computer, data switching exchane, control journey
Sequence system etc., field control cabinet are contained by data switching exchane and middle control dataphone, the nitrogen oxides of middle control computer judgement setting
The signal synthesis judgement such as amount of nitrogen oxides, fire path temperature that magnitude, on-line monitoring equipment are fed back, bristles with anger to field control cabinet
It enables, the command signal of computer is controlled in the execution of field control cabinet, adjusts denitrfying agent flow signal, keep on-line monitoring equipment feedback
Amount of nitrogen oxides is stablized, and fluctuates in setting value tolerance band, and wherein PLC receives the nitrogen of flue gas on-Line Monitor Device feedback
Oxide content signal, the flue-gas temperature signal that thermocouple 7 measures, artificial settings nitrogen oxides allow concentration of emission, PLC presses
Setting program adjusts denitration agent flux, keeps flue gas nitrogen oxide stable content.
Enclosed kiln high-temperature flue gas method of denitration of the utility model based on described device, comprising the following steps:
1) denitrification apparatus is connected to the quirk 4 of enclosed kiln；
2) compressed air is provided with air compressor machine 1, by filtering tank 2, the moisture of compressed air is excluded, with this compressed air
Convey denitrfying agent；
3) denitrfying agent is brought into the quirk 4 of enclosed kiln, denitrfying agent reacts generation reduction instead with coming into full contact with for flue gas
Denitration is answered, delivery rate is adjusted by adjusting denitrfying agent metering feeding device 3, there is crushing device 6 in denitrfying agent feed bin 5,
It is crushed and loose denitrfying agent in rotary course；Thermocouple 7 is used to detect 4 temperature of quirk enclosed kiln.
Wherein, the pressure of compressed air is 0.2~0.5MPa in the air compressor machine 1, by filtering and being adsorbed and removed compression
Moisture in air and impurity, clean anhydrous compressed air enter transportation system.
Wherein, the conveying of denitrfying agent described in step 2) is conveyed by air compressor machine output compressed air at positive pressure or negative pressure is defeated
It send.
Wherein, denitrfying agent described in step 2) is inorganic matter or amine-containing organic matter containing ammonium, it is preferable that the denitration
Agent is one of liquefied ammonia, ammonium hydroxide, ammonium carbonate, ammonium hydrogen carbonate, ammonium nitrate, acetamide, ammonium acetate, formamide and urea or several
Kind.It is further preferred that the denitrfying agent uses solid powder, and it is non-volatile, pollution-free, without security risk.
Wherein, it is crushed in rotary course in crushing device 6 described in step 3) and loose denitrfying agent prevents the side agglomerated
Method includes vibration, hammering, squeezes or stir.
Wherein, the denitrification apparatus measures denitration region flue-gas temperature, adjusts denitration agent flux, flue gas according to flue-gas temperature
Temperature denitration efficiency in 600~1100 DEG C of sections is higher, and denitration efficiency is not lower in the temperature range, thermocouple in flue
Flue-gas temperature is detected, 600 DEG C of temperatures above of flue-gas temperature increase amount of nitrogen oxides with temperature and rise, start at 600 DEG C or more
Denitrfying agent is sprayed into, as temperature raising gradually increases denitration agent flux, denitrfying agent pyrolytic is at other when to 1100 DEG C or more
Ingredient, is unfavorable for denitrating flue gas, and 1100 DEG C of flue-gas temperature or more whens then need to stop spraying into denitrfying agent.
Wherein, the denitrification apparatus is removable, follows flue-gas temperature mobile, when flue-gas temperature reaches 600 DEG C, denitration dress
Set starting operation, with temperature improve gradually increase denitration agent flux, when flue-gas temperature reaches 1000 DEG C, denitration agent flux by
Step reduces, and denitrification apparatus is out of service when flue-gas temperature reaches 1100 DEG C.Denitrification apparatus is transferred to down by overhead traveling crane or idler wheel
One quirk region to denitration (flue-gas temperature is lower) is spare.
Wherein, the denitrfying agent is affected by temperature, and sprays into 600~1100 DEG C of flues of flue-gas temperature after location point thermal-flame
Interior, it is vertical with high-temperature flue gas flow direction that denitrfying agent sprays into direction, the horn-like ejection of denitrfying agent spiral, and the abundant turbulent mixture of flue gas,
Improve reaction efficiency.
Wherein, need the nitrogen oxide mass ratio of removing for 1:1~1:2 in the denitrfying agent and flue gas.Nitrogen oxidation in flue gas
Object content is lower, and denitrfying agent usage ratio increases, otherwise usage ratio is reduced.
Wherein, the denitrfying agent quality and compressed air volume ratio are 1:4~1:8.
Wherein, the denitrfying agent is heated easy decomposition gasification, releases NH3。
Denitrification apparatus is placed in by high temperature kiln, powers on and compressed air pipe, denitrification apparatus are powered to starting and run,
System collects nitrogen oxides in effluent content, flue-gas temperature, artificial to set flue gas nitrogen oxide discharge value, automated system operation and
Denitration agent flux is adjusted, flue gas nitrogen oxide stable content is kept.Denitrification apparatus has low material position to alarm, when there is the alarm of low material position
Need to add denitrfying agent into feed bin and check confirmation material position.Denitrification apparatus has overtemperature alarm shutdown, and thermocouple detects flue gas temperature
When 600 or less, 1100 DEG C of degree or more, denitrification apparatus is automatically stopped and alarms.
The utility model proposes enclosed kiln high-temperature flue gas denitrification apparatus, 80% or more denitration efficiency, flue gas after denitration
Middle NOxContent 100mg/Nm3Hereinafter, being easily reduced to very much 50mg/Nm3Hereinafter, most low energy reduces 30mg/m3Below.Equipment investment
Few, autocontrol operation is safeguarded simple and convenient.Denitration efficiency is high, 80% or more denitration efficiency；It is able to achieve minimum discharge, meets country
The increasingly strict demand of environmental protection；Easy to operate, denitrification apparatus is Integral movable structure, the mobile starting operation that is powered afterwards in place；
Denitrfying agent is solid powder, non-volatile, pollution-free, without security risk.
Detailed description of the invention
Fig. 1 is the enclosed kiln gas denitrating system schematic diagram of the utility model.
Appended drawing reference
1 it is air compressor machine, 2 be filtering tank, 3 be denitrfying agent metering feeding device, 4 be the quirk of enclosed kiln, 5 is denitrfying agent
Feed bin, 6 be crushing device, 7 be thermocouple, 8 be PLC rack.
Specific embodiment
With reference to the accompanying drawings and detailed description, the utility model is described in more detail.
As shown in Figure 1, a kind of enclosed kiln high-temperature flue gas denitrification apparatus provided by the utility model, described device include:
Air compressor machine 1, filtering tank 2, denitrfying agent metering feeding device 3, denitrfying agent feed bin 5, crushing device 6, thermocouple 7；
Wherein, the air compressor machine 1 is connected to filtering tank 2, and the filtering tank 2 is connected to denitrfying agent metering feeding device 3, institute
The quirk 4 that denitrfying agent metering feeding device 3 is connected to enclosed kiln is stated, the denitrfying agent metering feeding device 3 is connected to denitration
Agent feed bin 5, the interior denitrfying agent feed bin 5 includes crushing device 6, and the thermocouple 7 is inserted in the quirk 4 of enclosed kiln.
Wherein, air compressor machine 1 conveys power as denitrfying agent for providing compressed air；Filtering tank 2 is empty for excluding compression
The moisture of gas；Denitrfying agent metering feeding device 3 controls denitration agent flux for adjusting feed revolving speed；The quirk 4 of enclosed kiln
Denitration is realized for reduction reaction to occur；Denitrfying agent feed bin 5 is used for the interim storeroom of denitrfying agent；Crushing device 6 is for revolving
Broken and loose denitrfying agent prevents from agglomerating during turning；Thermocouple 7 is used to detect the temperature of the quirk 4 of enclosed kiln.
Denitrfying agent metering feeding device 3 described in the utility model is gear structure, passes through stepper motor or frequency converter tune
Whole gear rotational speed p realizes the adjustment of denitration agent flux Q, wherein Q=cp, c are constant, i.e. the discharge quantity of the every rotation one week of gear,
P is gear rotational speed.
Filtering tank 2 described in the utility model is closed structure tank body, and slag-drip opening arranged at bottom, inside sieve, orifice plate as
Filter medium perhaps uses electrostatic precipitation as slagging-off medium or uses molecular sieve, active carbon etc. as adsorbing medium.
Crushing device 6 described in the utility model is mounted in denitrfying agent feed bin 5, crushing device power useable electric moter, electricity
Magnetic, compressed air etc. do power, connecting rod spring shock absorption noise reduction, quartering hammer and connecting rod Hard link, drive quartering hammer swing crushing
The denitrfying agent of agglomeration.
Denitrification apparatus described in the utility model further includes PLC rack 8, the judgement regulation denitrfying agent metering feeding device of PLC rack 8
3 revolving speed adjusts denitration agent flux, and PLC rack 8 includes field control cabinet, middle control computer, data switching exchane, controls programming system
Deng, field control cabinet by data switching exchane and middle control dataphone, the amount of nitrogen oxides value of middle control computer judgement setting,
The signal synthesis judgement such as amount of nitrogen oxides, fire path temperature of line monitoring device feedback, sends instructions to field control cabinet, scene control
The command signal that computer is controlled in cabinet execution processed, adjusts denitrfying agent flow signal, keeps the nitrogen oxides of on-line monitoring equipment feedback
Stable content, and fluctuated in setting value tolerance band, the nitrogen oxides that wherein PLC receives flue gas on-Line Monitor Device feedback contains
Measure signal, thermocouple 7 measure flue-gas temperature signal, artificial settings nitrogen oxides allow concentration of emission, PLC is by setup program
Denitration agent flux is adjusted, flue gas nitrogen oxide stable content is kept.
Embodiment 1
Graphite electrode cover-type roaster, using mobile denitrification apparatus, roots blower provides high-pressure blast, and denitrfying agent is with just
Wind model is pressed, denitrfying agent is brought into quirk, the flow direction of wind is in inversely to intersect with flow of flue gas direction, in lance outlet
Denitrfying agent reacts generation reduction reaction denitration with coming into full contact with for flue gas in the flue gas of turbulent flow.Charging gear revolving speed is adjusted to adjust
Whole delivery rate guarantees that nitrogen oxides in effluent stable content is controlled.There is mechanical gyratory agitation device in denitrfying agent feed bin, takes off
Nitre agent is in flow regime always, will not because the moisture absorption or it is heated occur dissolution agglomeration cause to be fed it is unsmooth, in thermocouple monitoring kiln
It is mobile to track best denitration temperature for flue-gas temperature.
Graphite electrode cover-type roaster, flue gas flow 30000Nm3/ h, smoke NOx content 350mg/Nm3, denitrfying agent use
Amount is 1 times of smoke NOx content, and denitrfying agent quality and compressed air volume ratio are 1:4, in high temperature furnace chamber from bell two sides
Hole sprays into denitrfying agent, and denitrfying agent covers gas well and first half quirk, 850 DEG C of thermocouple temperature measurement on bell, NOx removal rate 80%
More than；Middle smoke NOx content≤100mg/m after line flue gas monitoring denitration3, realize qualified discharge；Denitrfying agent proportion and it is other
Under conditions of index is constant, when denitrfying agent dosage is 2 times of smoke NOx content, middle flue gas NOx contains after line flue gas monitoring denitration
Amount≤50mg/m3, realize minimum discharge.
Embodiment 2
Tunnel kiln of fire resisting material, comparatively tunnel kiln smoke-gas temperature and stability of flow, flue gas are flowed to from high temperature sintering area
Low-temperature space, high-temperature flue gas flows in the interval of refractory product achievees the purpose that sintering.In kiln car interval middle position, installation is de-
Nitre agent spray gun, denitrification apparatus spray into denitrfying agent, the vertical flue gas flow direction spray of denitrfying agent in 600-1100 DEG C of the downstream region of combustion zone
Enter, is sufficiently mixed in kiln car interstitial spaces with flue gas and reacts reduction denitration.
Tunnel kiln of fire resisting material, flue gas flow 40000Nm3/ h, smoke NOx content 300mg/Nm3, denitrfying agent dosage is cigarette
0.5 times of gas NOx content, compressed air and denitrfying agent gas-solid ratio 4:1 are sprayed into after thermal-flame in high-temperature flue gas tunnel oven and are taken off
Nitre agent, denitrfying agent cover tunnel oven section, 900 DEG C of thermocouple temperature measurement in kiln, 80% or more NOx removal rate；Online flue gas monitoring
Middle smoke NOx content≤100mg/m after denitration3, realize qualified discharge；Under conditions of denitrfying agent proportion and other indexs are constant,
When denitrfying agent dosage is 1 times of smoke NOx content, middle smoke NOx content≤50mg/m after line flue gas monitoring denitration3, realize
Minimum discharge.
It should be noted last that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application.To the greatest extent
Pipe is described in detail the utility model referring to embodiment, those skilled in the art should understand that, it is practical to this
Novel technical solution is modified or replaced equivalently, without departing from the spirit and scope of the technical scheme of the present invention,
It should all cover in the scope of the claims of the utility model.
Claims (4)
1. a kind of enclosed kiln high-temperature flue gas denitrification apparatus, which is characterized in that described device includes: air compressor machine (1), filtering tank
(2), denitrfying agent metering feeding device (3), denitrfying agent feed bin (5), crushing device (6), thermocouple (7)；
Wherein, the air compressor machine (1) is connected to filtering tank (2), and the filtering tank (2) is connected to denitrfying agent metering feeding device
(3), the denitrfying agent metering feeding device (3) is connected to denitrfying agent feed bin (5), includes broken in the denitrfying agent feed bin (5)
Device (6), the thermocouple (7) are inserted in the quirk (4) of enclosed kiln.
2. denitrification apparatus according to claim 1, which is characterized in that the denitrfying agent metering feeding device (3) is gear
Structure adjusts the adjustment that gear rotational speed p realizes denitration agent flux Q by stepper motor or frequency converter, wherein Q=cp, c are normal
The discharge quantity of the every rotation one week of number, i.e. gear, p is gear rotational speed.
3. denitrification apparatus according to claim 1, which is characterized in that the filtering tank (2) is closed structure tank body, bottom
There is slag-drip opening, inside includes filter medium, slagging-off medium or adsorbing medium.
4. denitrification apparatus according to claim 1, which is characterized in that the crushing device (6) is mounted to denitrfying agent material
In storehouse (5), crushing device provides power using motor, electromagnetism or compressed air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821228913.9U CN208765514U (en) | 2018-08-01 | 2018-08-01 | A kind of enclosed kiln high-temperature flue gas denitrification apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821228913.9U CN208765514U (en) | 2018-08-01 | 2018-08-01 | A kind of enclosed kiln high-temperature flue gas denitrification apparatus |
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| Publication Number | Publication Date |
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| CN208765514U true CN208765514U (en) | 2019-04-19 |
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| CN201821228913.9U Ceased CN208765514U (en) | 2018-08-01 | 2018-08-01 | A kind of enclosed kiln high-temperature flue gas denitrification apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916184A (en) * | 2018-08-01 | 2019-06-21 | 北京英斯派克科技有限公司 | A kind of enclosed kiln high-temperature flue gas denitrification apparatus and method |
-
2018
- 2018-08-01 CN CN201821228913.9U patent/CN208765514U/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109916184A (en) * | 2018-08-01 | 2019-06-21 | 北京英斯派克科技有限公司 | A kind of enclosed kiln high-temperature flue gas denitrification apparatus and method |
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