CN208282640U - Exhaust gas processing device - Google Patents
Exhaust gas processing device Download PDFInfo
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- CN208282640U CN208282640U CN201820857163.5U CN201820857163U CN208282640U CN 208282640 U CN208282640 U CN 208282640U CN 201820857163 U CN201820857163 U CN 201820857163U CN 208282640 U CN208282640 U CN 208282640U
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Abstract
The utility model discloses a kind of exhaust gas processing devices, including processing system and transportation system；Processing system includes rotary kiln, dore furnace, preheater and two tertiary-air pipes, the tapering both ends of dore furnace are respectively equipped with low nitrogen and spray into point, tertiary-air pipe is equipped with tertiary-air pipe and sprays into point, preheater includes two groups of whirlwind cartridge modules set on dore furnace both ends, whirlwind cartridge module includes six grades of cyclone cylinders, and level V cyclone cylinder sprays into point by feeder pipe and low nitrogen and tertiary-air pipe sprays into point connection；Transportation system includes conveying assembly, storage assembly and adjusting component, conveying assembly includes the first air flume, elevator, the second air flume, third air flume and the 4th air flume, storage assembly includes the first holding vessel for storing raw material and the second holding vessel for storing desulfurizing agent, and adjusting component includes first turn of feeding valve, raw material flow meter and second turn of feeding valve.Exhaust gas processing device in the utility model solves the problems, such as that existing vent gas treatment is inefficient.
Description
Technical field
The utility model relates to manufacture of cement fume treatment technical fields, more particularly to a kind of exhaust gas processing device.
Background technique
With the rapid development of economy, more and more building mansions are built, therefore closely related with building construction
Cement industry be also rapidly progressed, however during manufacture of cement, can largely generate sulfur dioxide, nitrogen oxygen
The atmosphere pollutions such as compound, to realize the promotion to National Environmental and economic development, national regulation cement kiln end sulfur dioxide
Content is less than 200mg/m3, amount of nitrogen oxides is less than 400mg/m3, therefore cement industry must be to the sulfur dioxide and nitrogen of production
The tail gas such as oxide carry out vent gas treatment.
Wherein, for desulfurization process, the sulfur dioxide that the sulphur oxidation in raw material generates can quilt when passing through higher level's cyclone cylinder
CaO absorbs, remaining is then discharged from preheater with exhaust gas together, in the case where temperature is lower than 600 DEG C, above two-stage preheater
Middle CaCO3Resolution ratio is extremely low, so that the content of the CaO generated is less therefore lower for the absorption efficiency of sulfur dioxide, so that
A large amount of sulfur dioxide is discharged from preheater, causes the discharge capacity of sulfur dioxide exceeded.And existing cement production enterprise is wet by building
Method desulfurizing tower carries out desulfurization, but cost of investment needed for its wet desulphurization tower process is higher.
For denitration process, anoxycausis is carried out by coal dust and generates a large amount of CO reducing agent, nitrogen oxides is restored
At nitrogen, however, the CO gas flow generated in dore furnace is inadequate, so that its denitration in existing low-NO_x combustion technology
It is inefficient, therefore also need to continue to use ammonium hydroxide and carry out denitration, however the acquisition expenses of existing ammonium hydroxide is higher, so that causing existing
Have and the inefficient of denitration is carried out using low-NO_x combustion technology, and the problem of higher cost.
Utility model content
Based on this, in view of the shortcomings of the prior art, a kind of exhaust gas processing device is provided, solves existing vent gas treatment efficiency not
High problem.
The utility model provides a kind of exhaust gas processing device, including processing system and transportation system；
The processing system includes rotary kiln, dore furnace, preheater and two tertiary-air pipes, the tapering of the dore furnace
Left and right ends are respectively equipped with a low nitrogen and spray into point, and two tertiary-air pipes are respectively arranged on the left and right that the low nitrogen sprays into point top
Both ends, the tertiary-air pipe are equipped with tertiary-air pipe and spray into point, and the preheater includes being respectively arranged on described dore furnace or so two
Two groups of whirlwind cartridge modules at end, the whirlwind cartridge module include six grades of cyclone cylinders, the level V cyclone cylinder of the whirlwind cartridge module
Point is sprayed by the low nitrogen of feeder pipe and corresponding side and the tertiary-air pipe sprays into point connection, the cyclone cylinder group
6th grade of cyclone cylinder of part is connect by the feeder pipe with the kiln tail smoke-box of the rotary kiln；
The transportation system includes the conveying assembly connecting with the preheater and deposits with what the conveying assembly was connect
It stores up component and adjusts component, the conveying assembly includes that the first air for being connect with the preheater by the feeder pipe is oblique
Slot, the elevator being connect with first air flume, the second air flume being connect with the elevator, respectively with described
The third air flume and the 4th air flume of two air flumes connection, the storage assembly includes first for storing raw material
Holding vessel and the second holding vessel for storing desulfurizing agent, the adjusting component include set on the preheater and described the
First turn of feeding valve between one air flume, the raw material stream between the third air flume and second air flume
Meter and second turn of feeding valve between the 4th air flume and second holding vessel, first air are oblique
Slot is connect by the feeder pipe with the first order cyclone cylinder feed inlet of the whirlwind cartridge module.
Further, the storage assembly further includes the first pulverized coal bin and the second pulverized coal bin, and the adjusting component further includes
Coal power flowmeter, first pulverized coal bin by coal dust feed-line respectively be located at left end the tertiary-air pipe spray into point with
And the kiln hood connection of the rotary kiln, second pulverized coal bin is by the coal dust feed-line respectively and positioned at described the three of right end
Secondary air hose sprays into point and the low nitrogen sprays into point connection, and the coal dust feed-line is equipped with the coal power flowmeter.
Further, the dore furnace includes rising furnace body, decline furnace body, the bottom end for rising furnace body and the kiln tail
The top of smoke-box connection, the decline furnace body is connect with the top for rising furnace body, and the rising furnace body and the decline
Bending is in 180 ° between furnace body, and the bottom end of the decline furnace body passes through the 6th of whirlwind cartridge module described in three-way connector and two groups
Grade cyclone cylinder connection.
Further, two group of first ammonium hydroxide that the three-way connector is equipped with positioned at its left and right ends sprays into point, described
The third level cyclone cylinder exit of whirlwind cartridge module is equipped with the second ammonium hydroxide and sprays into point, and the storage assembly further includes for storing ammonia
The ammonia water tank of water, the adjusting component further includes ammonium hydroxide flowmeter, and the ammonia water tank passes through ammonium hydroxide pipeline and described first respectively
Ammonium hydroxide sprays into point and second ammonium hydroxide sprays into point connection, is set to the ammonium hydroxide flowmeter on the ammonium hydroxide pipeline.
Further, a tripper, the sub-material are equipped at the level V cyclone cylinder feed opening in the whirlwind cartridge module
Device is a three-port structure, and the feed inlet of the tripper is connect with the level V cyclone cylinder feed opening, the two of the tripper
A discharge port sprays into point by the feeder pipe and the corresponding low nitrogen respectively and the tertiary-air pipe sprays into point connection.
Further, the processing system further includes passing through with the outlet of the first order cyclone cylinder in the whirlwind cartridge module
The sequentially connected windmill of pipeline, sensor module and exhaust emissions processing unit, the sensor module and controller are electrical
Connection, the controller are electrically connected with the adjusting component and the tripper respectively.
Further, the sensor module includes that SO 2 sensor, NOx sensor and carbon monoxide pass
Sensor.
Exhaust gas processing device provided by the utility model, since tertiary-air pipe and dore furnace point are located at low nitrogen and spray into point
Top mentions so that the tertiary air introduced in tertiary-air pipe is located at the top of dore furnace so that can not be sprayed at point for low nitrogen
For tertiary air, so that the oxygen content that the low nitrogen sprays at point is lower, so that constructing an anoxycausis ring in dore furnace tapering
Border makes coal dust be easy burning under the anoxia condition of dore furnace tapering and generates carbon monoxide, reducing atmosphere needed for generating denitration.
While it is due to the setting of the first pulverized coal bin and the second pulverized coal bin, so that the pulverized coal consumption of its dore furnace and kiln hood can
To optimize adjustment respectively, and coal dust too fast will not be used up, while two pulverized coal bins will not influence the defeated of coal dust feed-line
Flow is sent, when the content that controller gets nitrogen oxides or carbon monoxide is higher, control signal can be transmitted to corresponding
Coal power flowmeter, so that corresponding control feeds the pulverized coal consumption that low nitrogen sprays into point or kiln hood, so that denitration efficiency can be improved.
Meanwhile in tail gas denitration process, the reducing zone that the nitrogen oxides in tail gas first passes through kiln tail is largely restored
For nitrogen, when there is also when nitrogen oxides, the ammonium hydroxide that tail gas and the first ammonium hydroxide spray into point carries out denitration reaction in tail gas, this
When make realize tail gas denitration.Tail gas desulfurization processing when, tail gas in the third level cyclone cylinder of preheater with the second ammonia
Water sprays into the ammonium hydroxide that point sprays into and carries out the ammonium nilrite that reaction generation is not easily decomposed, and realizes the tail gas desulfurization of part, is left
Tail gas when entering to by third level cyclone cylinder, second level cyclone cylinder, first order cyclone cylinder, with the desulfurization in mixed raw material
Agent reacts, so that realizing the desulfurization of remaining sulfur dioxide, it is ensured that sulfur dioxide in tail gas discharge meets national standard.
Simultaneously by adjust component setting so that adjustable mixed raw material flow and mixed raw material in raw material and
The content ratio of desulfurizing agent improves second turn of feeding valve of adjusting and makes that mixing can be increased when sulfur dioxide in tail gas content is higher
The content ratio of desulfurizing agent in raw material solves the problems, such as that existing vent gas treatment is inefficient.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the exhaust gas processing device proposed in an embodiment of the present invention.
Fig. 2 is the structural schematic diagram of processing system in Fig. 1.
Fig. 3 is the structural schematic diagram of transportation system in Fig. 1.
Fig. 4 is the facing structure that furnace bottom connection is decomposed in the exhaust gas processing device proposed in an embodiment of the present invention
Block diagram.
Fig. 5 is the side view structure that furnace bottom connection is decomposed in the exhaust gas processing device proposed in an embodiment of the present invention
Block diagram.
Specific embodiment
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing to this
The specific embodiment of utility model is described in detail.Many details are explained in the following description in order to abundant
Understand the utility model.But the utility model can be implemented with being much different from other way described herein, this field
Technical staff can do similar improvement without prejudice to the utility model connotation, therefore the utility model is not by following public affairs
The limitation for the specific implementation opened.
Wherein cement is mainly preheated in preheater by launching raw material when being produced, and passes through pipeline
It will be calcined in raw material blanking to dore furnace in coal dust and preheater, so that raw material carry out part predecomposition, and final
So that raw material carry out calcining in rotary kiln and generate clinker, and clinker carry out it is cooling after complete the production of cement, wherein cement into
When row production, since the calcining of coal dust and raw material in rotary kiln in rotary kiln kiln tail and dore furnace so that generate sulfur dioxide, nitrogen
The tail gas of the pollutants such as oxide, tail gas by entering in cyclone cylinder after the rising passway of dore furnace, and in cyclone cylinder into
Row is discharged in its cyclone cylinder exit by exhaust emission pipeline after rising, at this time due to sulfur dioxide, the nitrogen in tail gas
Oxide content is higher, so that its exhaust emissions exceeds national standard, by using exhaust gas processing device provided in this embodiment
The tail gas generated when for manufacture of cement is handled.
Fig. 1 to Fig. 5, the exhaust gas processing device 10 provided in an embodiment of the utility model, including processing system are be provided
System 20 and transportation system 30.
Wherein, processing system 20 includes rotary kiln 21, the dore furnace 22 above 212 smoke-box of kiln tail of rotary kiln 21, difference
The tertiary-air pipe 23 and preheater 24 being connect with dore furnace 22.Wherein, transportation system 30 includes the conveying connecting with preheater 24
Component 31 and the storage assembly 32 being connect with conveying assembly 31 and adjusting component 33.Wherein processing system 20 is used for raw material
The tail gas that calcining generates clinker and generates production process is carried out to handle.The transportation system 30 is used for needed for production
Raw material and carry out vent gas treatment material conveyed.
Wherein, rotary kiln 21 includes the kiln tail 212 for being set to the kiln hood 211 of front end and connecting set on end with dore furnace 22,
Kiln hood burner is wherein equipped at kiln hood 211, which connect with the tapering of dore furnace 22.
Wherein, which includes rising furnace body 221 and decline furnace body 222, wherein rising bottom end and the rotation of furnace body 221
212 smoke-box of kiln tail of kiln 21 connects, and the top for declining furnace body 222 is connect with the top for rising furnace body 221, and rises furnace body 221
Bending is in 180 ° between decline furnace body 222, and the bottom end of decline furnace body 222 passes through the two of three-way connector 223 and preheater 24
End connection.Further, two groups of low nitrogen that the tapering of the rising furnace body 221 in dore furnace 22 is equipped with positioned at its left and right ends spray into
Point 224.Two group of first ammonium hydroxide that three-way connector 223 in dore furnace 22 is equipped with positioned at its left and right ends sprays into point 225, should
Low nitrogen sprays into point 224 for feeding mixed raw material and coal dust, so that mixed raw material and coal dust are forged in dore furnace 22
Burn pre- thermal decomposition.First ammonium hydroxide sprays into point 225 for feeding ammonium hydroxide, so as to the complete nitrogen oxidation of denitration non-in dore furnace 22
Object carries out denitration process.
Wherein, the low nitrogen which is set to dore furnace 22 sprays into 224 top positions of point, and tertiary-air pipe 23 is used for
The tertiary air of high temperature is introduced in dore furnace 22.Tertiary-air pipe 23 is equipped with tertiary-air pipe and sprays into point 231, the tertiary air simultaneously
Pipe sprays into point 231 and is used for feeding part mixed raw material and part coal dust, so that mixed raw material and coal dust are in tertiary-air pipe 23
It is middle to carry out fully calcined pre- thermal decomposition.
Wherein, preheater 24 includes two groups of whirlwind cartridge modules 241 for being respectively arranged on 22 left and right ends of dore furnace, wherein whirlwind
Cartridge module 241 include six grades of cyclone cylinders, left end whirlwind cartridge module 241 be followed successively by from top to bottom C1A, C2A, C3A, C4A, C5A,
C6A cyclone cylinder, right end whirlwind cartridge module 241 are followed successively by C1B, C2B, C3B, C4B, C5B, C6B cyclone cylinder from top to bottom.Wherein
A tripper 2411 is equipped at level V cyclone cylinder (C5A cyclone cylinder, C5B cyclone cylinder) feed opening in the whirlwind cartridge module 241,
The tripper 2411 is a three-port structure, and the feed inlet of tripper 2411 is connect with level V cyclone cylinder feed opening, tripper
2411 two discharge ports pass through feeder pipe respectively and corresponding low nitrogen sprays into point 224 and tertiary-air pipe sprays into point 231 and connects
It connects.The low nitrogen with left end sprays into point 224 and tertiary-air pipe spray to tripper 2411 respectively i.e. in the whirlwind cartridge module 241 of left end
Access point 231 connects, and the low nitrogen with right end sprays into point 224 and tertiary air to tripper 2411 respectively in the whirlwind cartridge module 241 of right end
Pipe sprays into 231 connection of point.Further, the 6th grade of cyclone cylinder of two groups of whirlwind cartridge modules 241 respectively with three-way connector 223
Both ends connection, and the discharge port of the 6th grade of cyclone cylinder of two groups of whirlwind cartridge modules 241 is connected by feeder pipe and 212 smoke-box of kiln tail
It connects.Wherein, the third level cyclone cylinder exit of whirlwind cartridge module 241 is equipped with the second ammonium hydroxide and sprays into point 2412, second ammonium hydroxide spray
Access point 2412 is for feeding ammonium hydroxide, so that carrying out desulfurization process to the sulfur dioxide in preheater 24.
Wherein, which includes the first air flume 311 being connect with preheater 24 by feeder pipe and first
Elevator 312 that air flume 311 connects, the second air flume 313 being connect by pipeline with elevator 312, respectively with the
The third air flume 314 and the 4th air flume 315 of two air flumes 313 connection.Wherein, it should be pointed out that due to pre-
Hot device 24 includes two groups of whirlwind cartridge modules 241 set on 22 left and right ends of dore furnace, and therefore, which is promoted
Machine 312, the second air flume 313, third air flume 314 and the 4th air flume 315 quantity be two, with
Corresponding whirlwind cartridge module 241 is correspondingly arranged connection.And first air flume 311 passes through feeder pipe and whirlwind cartridge module
241 first order cyclone cylinder (C1A cyclone cylinder, C1B cyclone cylinder) feed inlet connection.
The storage assembly 32 includes the second storage for storing the first holding vessel 321 of raw material, for storing desulfurizing agent
Tank 322, the first pulverized coal bin 323 for storing coal dust and the second pulverized coal bin 324 and the ammonia water tank 325 for storing ammonium hydroxide,
Wherein the first holding vessel 321 is connect by feeder pipe with third air flume 314, and the second holding vessel 322 passes through feeder pipe and the
The connection of four air flumes 315, the first pulverized coal bin 323 and the second pulverized coal bin 324 are connected by coal dust feed-line dore furnace 22 respectively
It connects, ammonia water tank 325 is connect by ammonium hydroxide pipeline with dore furnace 22.Wherein, it should be pointed out that in the present embodiment, first storage
The quantity for depositing tank 321 is one, is set there are two discharge port, two discharge port passes through feeder pipe connected to it respectively and connects
To in corresponding third air flume 314, the quantity of second holding vessel 322 is two, respectively with the corresponding the 4th
Air flume 315 connects.
The adjusting component 33 includes first turn of feeding valve 331, raw material flow meter 332, second turns of feeding valves 333, coal power flowmeter
334 and ammonium hydroxide flowmeter 335, wherein first turn of feeding valve 331 is set between preheater 24 and the first air flume 311, raw material
Flowmeter 332 is set between third air flume 314 and the second air flume 313, and it is oblique that second turn of feeding valve 333 is set to the 4th air
Between slot 315 and the second holding vessel 322, coal power flowmeter 334 is set on coal dust feed-line, and ammonium hydroxide flowmeter 335 is set to ammonia
On water pipeline.Wherein, first turn of feeding valve 331,332, second turns of feeding valves 333 of raw material flow meter quantity be two.
Specifically, the quantity of coal dust feed-line is 5, which passes through each coal dust in the present embodiment
Feed-line sprays into point 231 with the tertiary-air pipe for being located at left end respectively and kiln hood 211 is connect, and the second pulverized coal bin 324 passes through each
A coal dust feed-line sprays into point 231 with the tertiary-air pipe for being located at right end respectively and low nitrogen sprays into point 224 and connect, wherein each
Coal power flowmeter 334 is equipped on coal dust feed-line.
It as shown in Figure 4, Figure 5, is the structural schematic diagram of the bottom of dore furnace 22, wherein low nitrogen sprays into point 224 close to kiln tail
212 smoke-boxes, the level V cyclone cylinder (C5A cyclone cylinder, C5B cyclone cylinder) in two groups of whirlwind cartridge modules 241 pass through feeder pipe point
Nitrogen not low with corresponding side sprays into point 224 and connect.Such as the level V cyclone cylinder in the whirlwind cartridge module 241 of left end
(C5A cyclone cylinder) sprays into point 224A connection by feeder pipe and the low nitrogen in left side, and the 6th grade in two groups of whirlwind cartridge modules 241
Cyclone cylinder (C6A cyclone cylinder) is connect with the tapering of the dore furnace 22 of corresponding side respectively by feeder pipe, further, coal
Powder feed-line is connected with the side wall of feeder pipe, and the point of coal dust feed-line and feeder pipe sprays into point close to low nitrogen
224, while the diameter of the coal dust feed-line is less than the diameter of feeder pipe, and there are two two sides are separately connected on every feeder pipe
Sub- coal dust feed-line, as shown in figure 5, respectively including coal dust B-1 and coal dust B-2 coal dust feed-line.Two strip coal at this time
When the coal dust conveyed in powder feed-line is fed into feeder pipe connected to it, the coal dust of coal dust feed-line can be with blanking
Mixed raw material in pipe sprays into 224 feeding of point into dore furnace 22 by low nitrogen after mixing.
Wherein the ammonia water tank 325 connects a main ammonium hydroxide pipeline, is connected with aqua ammonia pump 326 on the main ammonium hydroxide pipeline, the ammonium hydroxide
Pump 326 is for extracting the ammonium hydroxide in ammonia water tank 325.The main ammonium hydroxide pipeline is connected separately with two ammonium hydroxide pipelines, two ammonium hydroxide
Ammonium hydroxide flowmeter 335 is connected on pipeline, the two of them ammonium hydroxide pipeline passes through its two strips ammonium hydroxide pipeline respectively and is correspondingly connected with
Point 225 is sprayed into the first ammonium hydroxide and the second ammonium hydroxide sprays into point 2412, passes through two 335 controllable flow of ammonium hydroxide flowmeter warps at this time
Its first ammonium hydroxide sprays into point 225 and the second ammonium hydroxide sprays into the flow of point 2412.Wherein, each ammonium hydroxide sprays at point and is equipped with four
Spray gun.Its four spray guns are uniformly distributed in 360 ° of circumferential directions, and each branch spray gun is inserted into the ammonium hydroxide using 45 ° of angle and sprays into point
In, allow to expand atomisation area.
Further, processing system 20 further include in whirlwind cartridge module 241 first order cyclone cylinder (C1A cyclone cylinder,
C1B cyclone cylinder) outlet by the sequentially connected windmill 25 of pipeline, sensor module 26 and exhaust emissions processing unit,
The quantity of middle windmill 25 is two, is connected respectively with corresponding whirlwind cartridge module 241 by pipeline, and last is connected to together
It is connect after sensor module 26 with exhaust emissions processing unit, so that the first order cyclone cylinder of its two groups of whirlwind cartridge modules 241 goes out
Mouthful discharge tail gas be discharged into exhaust emissions processing unit, wherein the sensor module 26 include SO 2 sensor,
NOx sensor and carbon monoxide transducer are used to detect sulfur dioxide, nitrogen oxides and carbon monoxide in tail gas
Concentration.Wherein, the sensor module 26 and controller are electrically connected, the controller also with tripper 2411 and adjust component
33 are electrically connected.Controller can determine remaining in tail gas to be discharged according to the signal that sensor module 26 is sent at this time
The concentration information of sulfur dioxide, nitrogen oxides and carbon monoxide, and feedback control signal is sent to tripper according to concentration information
2411 and component 33 is adjusted, so that mixed raw material, coal dust and ammonium hydroxide in different location in control dore furnace 22 and rotary kiln 21
Dosage variation and feed the content ratio of desulfurizing agent into preheater 24, finally reduce sulfur dioxide, nitrogen oxides and
The residual volume of carbon monoxide.
Further, in manufacture of cement, the raw material stored in the first holding vessel 321 pass through feeder pipe blanking to third
Air flume 314, the desulfurizing agent stored in the second holding vessel 322 is by feeder pipe blanking to the 4th air flume 315, and the
The raw material of three air flumes 314 conveying and the desulfurizing agent of the 4th air flume 315 conveying are delivered in the second air flume 313,
And mixed raw material is formed after being mixed in the second air flume 313, mixed raw material is in the second air flume 313
By feeder pipe blanking to the tail end of elevator 312, pass through the castering action of elevator 312 at this time, so that mixed raw material is mentioned
Rise to similar in 24 top of preheater height, at this time the mixed raw material of 312 top export of elevator by feeder pipe blanking extremely
First air flume 311, and after the transport for passing through the first air flume 311, the first order cyclone cylinder of final blanking to cyclone cylinder
Feed inlet, so that the mixed raw material blanking that transportation system 30 is transported carries out vent gas treatment into processing system 20.
Wherein, it should be pointed out that each air flume in the conveying assembly 31 makes close using centrifugal blower as power source
The material closed in conveying skewed slot keeps fluidization to do slow flowing to inclined one end, and the equipment body part is without driving section
Point, using novel painting wheel air-permeable layer, seal operation is convenient for management, and weight of equipment is light, and conveying capacity is big, and malleable conveying direction,
So that can be used for transporting the easily fluidised granular material such as raw material, desulfurizing agent, cement, coal dust.While it may be noted that
It is, while conveying assembly 31 transports raw material, desulfurizing agent etc., by the adjustment effect to adjusting component 33, so that
Uninterrupted when its transport is adjusted, wherein in the present embodiment, which is specially lattice wheel, lattice wheel
The content for the material that each rotation is conveyed is kept fixed, therefore passes through the difference of lattice wheel speed, so that the material of its conveying
Flow generate it is different.
Further, it after mixed raw material blanking to the first order cyclone cylinder feed inlet of whirlwind cartridge module 241, transports downwards
After the dynamic preheating to carry out cyclone cylinders at different levels, eventually by level V cyclone cylinder and the 6th grade of cyclone cylinder (C6A cyclone cylinder,
C6B cyclone cylinder) it is calcined in blanking to rotary kiln 21, the wherein motion process of mixed raw material are as follows: mixed raw material blanking to the 5th
After grade cyclone cylinder, mixed raw material passes through the sub-material of tripper 2411, so that a part of mixed raw material enters to tertiary-air pipe spray
Access point 231, a part of mixed raw material enter to low nitrogen and spray into point 224.Its mixed raw material is all carried out to dore furnace 22, wherein
Mixed raw material is due to entering to the 6th grade of cyclone cylinder after the supreme kindling body 221 of vacuum suction, decline furnace body 222, and finally by the
Six grades of cyclone cylinder blankings are into rotary kiln 21.
Wherein it should be pointed out that it may make control mixed raw material blanking to tertiary-air pipe by controlling tripper 2411
23 and dore furnace 22 in content ratio.Wherein, point 231 is sprayed into the tertiary-air pipe and low nitrogen sprays into blanking at point 224 and has
Outside mixed raw material, also passing through the feeding of coal dust feed-line has coal dust, sprays into the mixing life of 231 feeding of point in tertiary-air pipe at this time
Material and coal dust enter in dore furnace 22 after carrying out calcining predecomposition in tertiary-air pipe 23, spray into 224 feeding of point in low nitrogen
Mixed raw material and coal dust carry out calcining predecomposition in dore furnace 22, eventually enter into after mixed raw material calcining to kiln tail 212
Smoke-box.And the calcining and decomposing of raw material is carried out in 212 smoke-box of kiln tail, the raw material of predecomposition are transported to kiln in 212 smoke-box of kiln tail
During first 211, the coal dust that feeding has coal dust feed-line to transport at kiln hood 211, simultaneously because locating for kiln hood burner
Oxygen content is high in environment, so that coal dust and mixed air are carried out full combustion so that it is ripe that raw material, which are calcined, by kiln hood burner
Material, and be delivered to grate-cooler at kiln hood 211 and cooled down, wherein 21 calcination temperature of rotary kiln is 1350-1450 degree.
Wherein, the tail gas motion process that cement production process generates is that kiln hood burner makes it due to full combustion
The tail gas containing sulfur dioxide, nitrogen oxides is generated, and moves to the kiln tail of rotary kiln 21 with negative pressure from the kiln hood of rotary kiln 21 211
212 smoke-boxes, simultaneously because the abundant oxy combustion of kiln hood 211, so that the oxygen content of its kiln tail 212 for being located at end is lower,
Oxygen content is generally 2~3% in its 212 tail gas of kiln tail, and kiln tail 212 is in anaerobic condition at this time, further, rises furnace body
221 inside, which are formed, rises air duct, declines and forms decline air duct inside furnace body 222, the tail gas in 212 smoke-box of kiln tail of rotary kiln 21
After being risen in rising furnace body 221, is declined in decline furnace body 222, moved to eventually by three-way connector 223
In preheater 24, tail gas is entered in the 6th grade of cyclone cylinder of whirlwind cartridge module 241 by three-way connector 223 at this time, and by
The work of windmill 25 in the exit of the first order cyclone cylinder with whirlwind cartridge module 241 generates negative pressure, so that attracting tail gas from rotation
It is moved to after being gradually risen in cyclone cylinders at different levels in air duct component 241 in the first order cyclone cylinder of whirlwind cartridge module 241, and from
The exit of the first order cyclone cylinder of whirlwind cartridge module 241 is discharged, wherein the tail gas being discharged passes through sensor module 26, the sensing
The content of sulfur dioxide, nitrogen oxides and carbon monoxide in the detection tail gas of device assembly 26, and when content is more than preset value,
Controller controls tripper 2411 and adjusts component 33, so as to reduce sulfur dioxide, nitrogen oxides and the oxygen in tail gas
Change the content of carbon.
Wherein, the sweetening process of sulfur dioxide in tail gas is mainly and is entered by the mixed raw material that transportation system 30 conveys
After the multistage preheating for carrying out cyclone cylinders at different levels after to preheater 24, with sulphur existing for sulphided form in raw material, then can 300~
600 DEG C are oxidized generation SO2The third level cyclone cylinder of six grades of preheaters mainly occurs for gas, therefore three sections of cyclone cylinders go out the degree of lip-rounding
At a large amount of sulfur dioxide gas.Its part sulfur dioxide sprays into 2412 ammonium hydroxide sprayed into of point with the second ammonium hydroxide and carries out reacting generation not
Labile ammonium nilrite, realizes the tail gas desulfurization of part, and remaining tail gas is revolved by third level cyclone cylinder, the second level
Desulfurizing agent reacts when air duct, first order cyclone cylinder and in mixed raw material, so that realizing the desulfurization of remaining sulfur dioxide, it is ensured that
Sulfur dioxide in tail gas discharge meets national standard, wherein in the present embodiment, which is greater than 90% dry powder using purity
White lime, desulfurizing agent react with the sulfur dioxide in tail gas, generate calcium sulphate solid.Cardinal principle is as follows: SO2+Ca
(OH)2=CaSO4+H2O.Calcium sulphate solid is difficult to happen decomposition at this time, and backwardness eventually enters into dore furnace under cyclone cylinders at different levels
In 22, and kiln hood 211 is entered to through kiln tail 212, be finally discharged in rotary kiln 21 together with clinker, so that realizing the de- of tail gas
Sulphur.The prior art carries out desulfurization using purchase desulfurizing agent, and cost is high, in the present embodiment, by first use ammonium hydroxide into
Row desulfurization, and the dosage of its ammonium hydroxide remains unchanged, and when so that ammonium hydroxide not being able to achieve whole desulfurization, passes through subsequent desulfurizing agent at this time
Desulfurization, which to realize, continues desulfurization to the sulfur dioxide in tail gas, it is ensured that and sulfur dioxide in tail gas discharge meets national standard,
So that desulfuration efficiency is high using the desulfurization simultaneously of desulfurizing agent and ammonium hydroxide, cost is reduced, while it is since its ammonium hydroxide can whole and tail gas
Middle sulfur dioxide is reacted, so that the problem of can avoid the escaping of ammonia.
Wherein, the denitrification process of nitrogen oxide in tail gas is mainly that the oxygen content of 212 smoke-box of kiln tail is lower, and three times
The low nitrogen that air hose 23 is set to dore furnace 22 sprays into 224 top of point, so that the tertiary air introduced in tertiary-air pipe 23 is located at dore furnace
22 top can not spray at point 224 for low nitrogen and provide tertiary air, therefore the oxygen content that low nitrogen sprays at point 224 is lower,
The coal dust that low nitrogen sprays into feeding at point 224 at this time burns under anaerobic condition generates a large amount of carbon monoxide, and carbon monoxide is strong
Nitrogen oxides in 212 gas of kiln tail can be reduced into nitrogen, specific chemical equation are as follows: CO+NO → CO by reducing agent2+1/
2N2, this chemical reaction can be rapidly completed by the promotion of high temperature and the catalysis of raw material, therefore form denitration in the tapering of dore furnace 22
Required reducing atmosphere.The tail gas for moving to kiln tail 212 by kiln hood 211 at this time sprays into point in the low nitrogen for rising to dore furnace 22
When 224, the nitrogen oxides in tail gas is reduced into nitrogen.When, there is also when nitrogen oxides, nitrogen oxides is in threeway in tail gas
It sprays into 225 ammonium hydroxide sprayed into of point with the first ammonium hydroxide in connector 223 to be reacted, wherein it should be pointed out that the dore furnace 22
880 DEG C are generally in the temperature of the three-way connector 223 of 24 junction of preheater, makes the ammonium hydroxide can under the reaction temperature
It reacts with nitrogen oxides and realizes denitration.The nitrogen restored at this time rise eventually by cyclone cylinders at different levels after from first order whirlwind
The exit discharge of cylinder, so that realizing the denitration of tail gas.The prior art, which is used, carries out denitration by ammonium hydroxide, and cost is high
And it is easy to produce the escaping of ammonia, in the present embodiment, coal dust is first passed through in low nitrogen and sprays into 224 burning generation reducing atmosphere of point to tail
Nitrogen oxides carries out denitration in gas, in the partially tail gas of incomplete denitration, is realized by the ammonium hydroxide that the first ammonium hydroxide sprays into point 225
The denitration of residual exhaust, the ammonium hydroxide which sprays into point 225 feed as denitration, mainly pass through coal dust and taken off
Nitre so that denitration efficiency is high, and reduces production cost.
When specifically used, coal dust progress full combustion to generate at its kiln tail 212 by the kiln hood burner in rotary kiln 21
The tail gas of nitrogen-containing oxide, therefore reduced the coal dust feed quantity of kiln hood 211 in the present embodiment to the greatest extent, kiln hood in the present embodiment
211 pulverized coal consumption accounts for the 35-40% of total dosage, and the coal dust feed quantity by reducing kiln hood 211 to reduce nitrogen oxides
Generation, further, kiln tail 212 due to lacking oxygen so that its 212 smoke-box of kiln tail formed an anaerobic environment, exist at this time
The low nitrogen in 22 tapering of dore furnace sprays into 224 feeding coal dust of point, and the pulverized coal consumption that low nitrogen sprays into point 224 in the present embodiment accounts for total dosage
50-65%, the coal dust fed at this time produce under reducing atmosphere with the carbon monoxide of strong reducing property, carbon monoxide can be held at this time
For the continuous reaction of nitrogen oxides with 212 tail gas of kiln tail so that nitrogen oxides is reduced into nitrogen, denitration reaction can be until one oxygen
Until change carbon exhausts.When there is also when nitrogen oxides, all tail gas are after declining air duct, remaining nitrogen oxides in tail gas
The ammonium hydroxide for spraying into point 225 with the first ammonium hydroxide carries out denitration reaction, makes the denitration for realizing tail gas at this time.Simultaneously after its denitration reaction
Remaining ammonium hydroxide can be reacted with the sulfur dioxide in tail gas, so that realizing the tail gas desulfurization of part.
Further, since the negative pressure that the work of windmill 25 generates moves to it after tail gas enters in preheater 24
In exhaust emissions processing unit, wherein tail gas during whirlwind cartridge module 241 rises, sulfur dioxide in tail gas first with
Ammonium hydroxide reacts, and realizes that most tail gas desulfurization, sulfur dioxide and the desulfurizing agent of remainder react, so that real
The desulfurization of existing tail gas, it is ensured that sulfur dioxide in tail gas content meets national standard.The sulfur dioxide of the acquisition of sensor module 26 at this time,
The concentration information of nitrogen oxides and carbon monoxide is simultaneously sent to controller.
Wherein, when the concentration that controller gets sulfur dioxide in tail gas is more than pre-set level, then illustrate desulfurizing agent
Dosage is less, so that there are sulfur dioxide being more than national standard in tail gas, controller issues control signal to adjusting component at this time
Second turn of feeding valve 333 in 33, so as to the flow of desulfurizing agent is increased, to adjust the content ratio of the desulfurizing agent in mixed raw material,
So that remaining sulfur dioxide in tail gas can be carried out desulphurization reaction by mixed raw material of the feeding into cyclone cylinder, it is ensured that dioxy in tail gas
Change sulfur content and meets national standard.At this time when the concentration that controller gets sulfur dioxide in tail gas is maintained within normal range
When, controller issues control signal to the second turn of feeding valve 333 adjusted in component 33, so that second turn of feeding valve 333 stops continuing
The flow of desulfurizing agent is increased, so that maintaining the flow of the desulfurizing agent to realize and carry out desulfurization process to the sulfur dioxide in tail gas.
Wherein, when the concentration that controller gets nitrogen oxide in tail gas is more than pre-set level, then illustrate that low nitrogen sprays into
Pulverized coal consumption in point 224 is less, and the pulverized coal consumption in kiln hood 211 and tertiary-air pipe 23 is more, so that its reducing zone generated
The content of carbon monoxide is less, and the content of the nitrogen oxides of the burning generation of kiln hood 211 is more, and denitration reaction exhausts an oxygen at this time
When changing carbon, also remaining a large amount of nitrogen oxides, controller sends a control signal to each coal power flowmeter 334 at this time, so that
Low nitrogen must be delivered to and spray into the coal dust amount increase of point 224, while reducing the coal dust amount for being delivered to kiln hood 211 and tertiary-air pipe 23,
Not only it may insure that nitrogen oxides met national standard, but also the residual volume of carbon monoxide can be reduced.
Wherein, when the concentration that controller gets carbon monoxide in tail gas is more than pre-set level, then illustrate that low nitrogen sprays into
Pulverized coal consumption in point 224 is more, and the pulverized coal consumption in kiln hood 211 and tertiary-air pipe 23 is smaller, so that its reducing zone generated
The content of carbon monoxide is more, and remaining amount of nitrogen oxides is less after carbon monoxide denitration reaction, at this time denitration reaction
When almost exhausting nitrogen oxides, also remain carbon monoxide, controller sends a control signal to each coal power flowmeter at this time
334, it is reduced so that being delivered to low nitrogen and spraying into the coal dust amount of point 224, while increasing and being delivered to kiln hood 211 and tertiary-air pipe 23
Coal dust amount.Controller is sent a control signal in each coal power flowmeter 334 at this time, so that being delivered to low nitrogen sprays into point 224
Coal dust amount reduce, while increasing the coal dust amount of kiln hood 211 and tertiary-air pipe 23 of being delivered to, to reduce the remnants of carbon monoxide
Amount, while ensuring that nitrogen oxides meets discharge standard.
In the present embodiment, since tertiary-air pipe 23 is set to 22 top of dore furnace, so that being introduced three times in tertiary-air pipe 23
Wind is located at the top of dore furnace 22, and in the present embodiment, the point of tertiary-air pipe 23 and dore furnace 22 is set to low nitrogen and sprays into point 224
At 25 meters of top, tertiary air is provided so that can not spray into for low nitrogen at point 224, so that the low nitrogen sprays into the oxygen at point 224
Gas content is lower, and oxygen content is 2-3% in the utility model, in 212 smoke-box tail gas of kiln tail, so that in 22 tapering of dore furnace
An anoxycausis environment is constructed, so that coal dust is burnt under 22 tapering anoxia condition of dore furnace and generates carbon monoxide, generate denitration
Required reducing atmosphere, while in the prior art, 23 point of tertiary-air pipe is set to low nitrogen and sprays at 224 5 meters of top of point, therefore
Compared with the prior art, by increasing by 23 point of tertiary-air pipe and low nitrogen the present embodiment sprays into point the distance between 224, so that depositing
It allows coal dust to burn under anaerobic environment in the sufficient time and generates carbon monoxide, and have the nitrogen oxidation in sufficient time and tail gas
Object reacts, and improves denitration efficiency.
While it is due to the setting of the first pulverized coal bin 323 and the second pulverized coal bin 324, so that its dore furnace 22 and kiln hood 211
Pulverized coal consumption can optimize adjustment respectively, and coal dust too fast will not be used up, while two pulverized coal bins will not influence coal dust
Control can be transmitted when the content that controller gets nitrogen oxides or carbon monoxide is higher in the feed flow of feed-line
Signal is to corresponding coal power flowmeter 334, so that corresponding control is fed, low nitrogen sprays into point 224 or the coal dust of kiln hood 211 is used
Amount.And in the prior art, since the pulverized coal consumption that its low nitrogen sprays into point 224 and kiln hood 211 is larger, low nitrogen sprays into point 224 and kiln
First 211 coal dust is all made of a pulverized coal bin and is conveyed, and uses up so that the coal dust in its pulverized coal bin is easily too fast, while being difficult to add
The coal dust feed quantity of point 224 is sprayed into low nitrogen greatly.
Simultaneously because in the present embodiment compared with the prior art 155 meters of the total length of dore furnace 22 increases 30 meters, so that
Preheating denitration effect of the raw material in dore furnace 22 can be improved in longer rising furnace body 221 and decline furnace body 222 in it,
The load that rotary kiln 21 calcines raw material is reduced, the pulverized coal consumption of kiln hood 211 is reduced, reduces the nitrogen oxides total amount in kiln hood 211
It generates, improves denitration efficiency.
Further, when controller gets the signal of the transmission of sensor module 26, and determine that nitrogen oxygen flower object is super in tail gas
When crossing national emission standard, controller sends a control signal to ammonium hydroxide flowmeter 335 according to the concentration information of nitrogen oxides, with
So that ammonium hydroxide flowmeter 335 is controlled lance ejection ammonium hydroxide and control ammonia water spray flow, to ensure that discharged nitrous oxides meet country
Standard.
Simultaneously by the setting of first turn of feeding valve, 331, second turns of feeding valves 333 and raw material flow meter so that adjustable mixed
The content ratio of raw material and desulfurizing agent in the flow and mixed raw material of symphysis material, when sulfur dioxide in tail gas content is more than
When national standard, improves second turn of feeding valve 333 of adjusting and make the content ratio that can increase desulfurizing agent in mixed raw material, and not shadow
Ring the normal calcining of the raw material in cement production process.Ensure that sulfur dioxide in tail gas content meets national standard, solves existing
The inefficient problem of vent gas treatment.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (7)
1. a kind of exhaust gas processing device, which is characterized in that including processing system and transportation system；
The processing system includes rotary kiln, dore furnace, preheater and two tertiary-air pipes, the tapering or so of the dore furnace
Both ends are respectively equipped with a low nitrogen and spray into point, and two tertiary-air pipes are respectively arranged on the left and right two that the low nitrogen sprays into point top
End, the tertiary-air pipe are equipped with tertiary-air pipe and spray into point, and the preheater includes being respectively arranged on the dore furnace left and right ends
Two groups of whirlwind cartridge modules, the whirlwind cartridge module includes six grades of cyclone cylinders, and the level V cyclone cylinder of the whirlwind cartridge module is logical
The low nitrogen for crossing feeder pipe and corresponding side sprays into point and tertiary-air pipe penetrating point connection, the whirlwind cartridge module
The 6th grade of cyclone cylinder connect by the feeder pipe with the kiln tail smoke-box of the rotary kiln；
The transportation system includes the conveying assembly connecting with the preheater and the storage group connecting with the conveying assembly
Part and adjust component, the conveying assembly include the first air flume being connect with the preheater by the feeder pipe, and
The elevator of first air flume connection, the second air flume being connect with the elevator, respectively with second sky
The third air flume and the 4th air flume of gas skewed slot connection, the storage assembly include the first storage for storing raw material
Tank and the second holding vessel for storing desulfurizing agent, the adjusting component include set on the preheater and described first empty
First turn of feeding valve between gas skewed slot, the raw material flow between the third air flume and second air flume
Meter and second turn of feeding valve between the 4th air flume and second holding vessel, first air flume
It is connect by the feeder pipe with the first order cyclone cylinder feed inlet of the whirlwind cartridge module.
2. exhaust gas processing device according to claim 1, which is characterized in that the storage assembly further includes the first pulverized coal bin
With the second pulverized coal bin, the adjusting component further includes coal power flowmeter, and first pulverized coal bin is distinguished by coal dust feed-line
The kiln hood for spraying into point and the rotary kiln with the tertiary-air pipe for being located at left end is connect, and second pulverized coal bin passes through the coal
Powder feed-line sprays into point with the tertiary-air pipe for being located at right end respectively and the low nitrogen sprays into point connection, and the coal dust is defeated
Pipeline is sent to be equipped with the coal power flowmeter.
3. exhaust gas processing device according to claim 1, which is characterized in that the dore furnace includes rising furnace body, decline
Furnace body, the bottom end for rising furnace body are connect with the kiln tail smoke-box, the top of the decline furnace body and the rising furnace body
Top connection, and bending is in 180 ° between the rising furnace body and the decline furnace body, the bottom end of the decline furnace body passes through three
Lead to fitting to connect with the 6th grade of cyclone cylinder of whirlwind cartridge module described in two groups.
4. exhaust gas processing device according to claim 3, which is characterized in that the three-way connector, which is equipped with, is located at its left side
Two group of first ammonium hydroxide at right both ends sprays into point, and the third level cyclone cylinder exit of the whirlwind cartridge module is sprayed into equipped with the second ammonium hydroxide
Point, the storage assembly further include the ammonia water tank for storing ammonium hydroxide, and the adjusting component further includes ammonium hydroxide flowmeter, the ammonia
Water pot passes through ammonium hydroxide pipeline respectively and first ammonium hydroxide sprays into point and second ammonium hydroxide sprays into point connection, the ammonium hydroxide pipeline
It is upper to be set to the ammonium hydroxide flowmeter.
5. exhaust gas processing device according to claim 4, which is characterized in that the level V whirlwind in the whirlwind cartridge module
A tripper is equipped at cylinder feed opening, the tripper is a three-port structure, the feed inlet of the tripper and the level V
The connection of cyclone cylinder feed opening, two discharge ports of the tripper pass through the feeder pipe and the corresponding low nitrogen respectively
It sprays into point and the tertiary-air pipe sprays into point connection.
6. exhaust gas processing device according to claim 5, which is characterized in that the processing system further includes and the whirlwind
The outlet of first order cyclone cylinder in cartridge module passes through at the sequentially connected windmill of pipeline, sensor module and exhaust emissions
Manage device, the sensor module and controller are electrically connected, the controller respectively with the adjusting component and the sub-material
Device is electrically connected.
7. exhaust gas processing device according to claim 6, which is characterized in that the sensor module includes that sulfur dioxide passes
Sensor, NOx sensor and carbon monoxide transducer.
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|---|---|---|---|
| CN201820857163.5U CN208282640U (en) | 2018-06-04 | 2018-06-04 | Exhaust gas processing device |
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|---|---|---|---|
| CN201820857163.5U CN208282640U (en) | 2018-06-04 | 2018-06-04 | Exhaust gas processing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113251411A (en) * | 2021-05-31 | 2021-08-13 | 国能神东煤炭集团有限责任公司 | Multi-pollutant cooperative control system and method for coal-fired industrial boiler |
| CN113289467A (en) * | 2021-06-29 | 2021-08-24 | 成都达奇环境科技有限公司 | Treatment method of flue gas produced by metal catalyst |
-
2018
- 2018-06-04 CN CN201820857163.5U patent/CN208282640U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113251411A (en) * | 2021-05-31 | 2021-08-13 | 国能神东煤炭集团有限责任公司 | Multi-pollutant cooperative control system and method for coal-fired industrial boiler |
| CN113289467A (en) * | 2021-06-29 | 2021-08-24 | 成都达奇环境科技有限公司 | Treatment method of flue gas produced by metal catalyst |
| CN113289467B (en) * | 2021-06-29 | 2022-08-26 | 成都达奇环境科技有限公司 | Treatment method of flue gas produced by metal catalyst |
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