CN208275247U - Denitrification apparatus - Google Patents
Denitrification apparatus Download PDFInfo
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- CN208275247U CN208275247U CN201820368441.0U CN201820368441U CN208275247U CN 208275247 U CN208275247 U CN 208275247U CN 201820368441 U CN201820368441 U CN 201820368441U CN 208275247 U CN208275247 U CN 208275247U
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Abstract
The utility model discloses a kind of denitrification apparatus, including rotary kiln, dore furnace above the kiln tail of rotary kiln, the tertiary-air pipe and cyclone cylinder being connect respectively with dore furnace, and the pulverized coal bin of coal dust is provided for rotary kiln and dore furnace, wherein the tapering left and right ends of dore furnace are respectively equipped with a low nitrogen and spray into point, the top left and right ends that low nitrogen sprays into point in dore furnace are connected separately with a tertiary-air pipe, tertiary-air pipe is equipped with tertiary-air pipe and sprays into point, pulverized coal bin includes the first pulverized coal bin and the second pulverized coal bin, first pulverized coal bin sprays into point connection by the kiln hood and the tertiary-air pipe in the tertiary-air pipe of left end of corresponding coal dust feed-line and rotary kiln respectively, second pulverized coal bin sprays into point by corresponding coal dust feed-line and low nitrogen respectively and the tertiary-air pipe in the tertiary-air pipe of right end sprays into point connection.The utility model proposes denitrification apparatus solve the problems, such as that existing coal dust denitration efficiency is not high.
Description
Technical field
The utility model relates to manufacture of cement fume treatment technical fields, more particularly to a kind of denitrification apparatus.
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 nitrogen oxides, cement
The discharged nitrous oxides of industry have been only second to thermoelectricity and motor vehicle industry, mention to realize to National Environmental and economic development
It rises, national correlation department puts into effect the policy and pollutant emission standard of NOx emission control in succession, therefore cement industry must be to life
The nitrogen oxides tail gas of production carries out denitration process.
Existing cement production enterprise to tail gas carry out the mode of denitration process usually can processing before divided combustion, combustion system change
Into and burning after three kinds of methods of processing.Pre-treatment of burning is mainly to carry out the denitrogenation of fuel；The improvement of combustion system is adopted at present
With low-NO_x combustion technologies such as low nitrogen oxide burner, fractional combustions；Processing after burning refers mainly to gas denitrifying technology, mainly
Including selective non-catalytic reduction technology (SNCR) and SCR technology (SCR), wherein lead in low-NO_x combustion technology
It crosses coal dust and carries out the reducing agents such as a large amount of CO of anoxycausis generation and fixed carbon, nitrogen oxides is reduced into nitrogen；Wherein
SNCR reducing agent generallys use ammonium hydroxide, and the ammonium hydroxide by spraying into concentration about 23% in dore furnace for nitrogen oxides to be reduced into
Nitrogen, the specific reaction formula of ammonium hydroxide denitration are as follows: 4NH3+4NO→4N2+6H2O。
However, coal dust, which sprays into ratio, in existing low-NO_x combustion technology, in dore furnace can only achieve the left side 40-50%
The straying quatity on the right side, coal dust is inadequate, so that the CO gas flow generated in its dore furnace is inadequate, so that its denitration efficiency is not high, because
This also needs to continue to use ammonium hydroxide and carries out denitration, however the acquisition expenses of existing ammonium hydroxide is higher, so that causing existing using low nitrogen
Combustion technology carries out the inefficient of denitration, and the problem of higher cost；According to existing ammonium hydroxide denitration technology, then more plus
Vent gas treatment cost.
Utility model content
Based on this, in view of the shortcomings of the prior art, a kind of denitrification apparatus is provided, it is not high to solve existing coal dust denitration efficiency
Problem.
The utility model provides a kind of denitrification apparatus, including rotary kiln, the dore furnace above the kiln tail of the rotary kiln, divides
The tertiary-air pipe and cyclone cylinder that do not connect with the dore furnace and the coal dust of coal dust is provided for the rotary kiln and the dore furnace
Storehouse, the tapering left and right ends of the dore furnace are respectively equipped with a low nitrogen and spray into point, and low nitrogen described in the dore furnace sprays into point
Top left and right ends are connected separately with a tertiary-air pipe, and the tertiary-air pipe is equipped with tertiary-air pipe and sprays into point, the coal
Powder cabin include the first pulverized coal bin and the second pulverized coal bin, first pulverized coal bin pass through respectively corresponding coal dust feed-line with it is described
The kiln hood of rotary kiln and the tertiary-air pipe in the tertiary-air pipe of left end spray into point connection, second pulverized coal bin point
Point is sprayed by the corresponding coal dust feed-line and the low nitrogen and in the tertiary-air pipe of right end described in
Tertiary-air pipe sprays into point connection.
Denitrification apparatus provided by the utility model, since tertiary-air pipe and dore furnace point are located at low nitrogen and spray on point
Side provides 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
Tertiary air, so that the oxygen content that the low nitrogen sprays at point is lower, so that an anoxycausis environment is constructed in dore furnace tapering,
So that coal dust is easy burning under the anoxia condition of dore furnace tapering and generate carbon monoxide, reducing atmosphere needed for generating denitration passes through
First pulverized coal bin, and the tertiary-air pipe spray with the kiln hood of rotary kiln and in the tertiary-air pipe of left end respectively of the first pulverized coal bin are set
Access point connection, the second pulverized coal bin sprays into point with low nitrogen respectively and the tertiary-air pipe in the tertiary-air pipe of right end sprays into point company
It connects, the pulverized coal consumption of its dore furnace and kiln hood is allowed to optimize adjustment respectively.In the prior art, low nitrogen in dore furnace
Spraying into point coal dust is that independent pipeline is injected to dore furnace, and raw material are also that independent pipeline enters dore furnace, and two inlet points do not exist
Together, dore furnace local temperature is too high after causing coal dust to spray into, and pulverized coal consumption can not be promoted.In the present embodiment, the low nitrogen of dore furnace
It sprays into after point coal dust is mixed with raw material and enters dore furnace together again, avoid dore furnace localized hyperthermia.Low nitrogen can be increased to spray into
The pulverized coal consumption of the feeding of point increases the content of carbon monoxide in reducing atmosphere, realizes the complete denitration of nitrogen oxide in tail gas.
Coal dust is uniformly mixed with raw material simultaneously is conducive to improve raw material predecomposition effect.Mitigate rotary kiln calcination of chamotte load, further
Kiln hood burner pulverized coal consumption is reduced, nitrogen oxides total amount is reduced, solves the problems, such as that existing coal dust denitration efficiency is not high.
Further, the cyclone cylinder includes the first sub- whirlwind cartridge module and second at left and right sides of the dore furnace
Sub- whirlwind cartridge module, the first sub- whirlwind cartridge module and the second sub- whirlwind cartridge module include six grades of cyclone cylinders, and described first
One first tripper is equipped in level V cyclone cylinder feed opening in sub- whirlwind cartridge module, first tripper is threeway knot
Structure, two discharge ports of first tripper pass through the institute that corresponding feed-line is connected to left end in the dore furnace respectively
It states low nitrogen penetrating point and the tertiary-air pipe in the tertiary-air pipe of left end sprays into point, the second sub- cyclone cylinder
The second tripper is equipped in level V cyclone cylinder feed opening in component, two discharge ports of second tripper pass through respectively
The low nitrogen that the corresponding feed-line is connected to right end in the dore furnace spray into point and positioned at described in right end three times
The tertiary-air pipe in air hose sprays into point.
Further, the dore furnace includes rising furnace body, decline furnace body, the bottom end for rising furnace body and the rotary kiln
The connection of kiln tail smoke-box, the top of the decline furnace body connect with the top of the rising furnace body, and the rising furnace body and institute
Bending is stated between decline furnace body in 180 degree, the bottom end of the decline furnace body passes through three-way connector and corresponding described the
One connexon whirlwind cartridge module is connected with the described second sub- whirlwind cartridge module.
Further, the 6th grade of cyclone cylinder feed opening in the described first sub- whirlwind cartridge module by the feed-line with
The kiln tail smoke-box of the rotary kiln connects, and the 6th grade of cyclone cylinder in the first sub- whirlwind cartridge module passes through the three-way connector
It is connect with the decline furnace body, the 6th grade of cyclone cylinder feed opening in the second sub- whirlwind cartridge module passes through the feed-line
It is connect with the kiln tail smoke-box of the rotary kiln, the 6th grade of cyclone cylinder in the second sub- whirlwind cartridge module is connected by the threeway
Part is connect with the decline furnace body.
Further, it is equipped with coal power flowmeter on each coal dust feed-line, the denitrification apparatus further includes one
Controller, the controller are connect with each coal power flowmeter respectively, for sending a control signal to each coal dust
Flowmeter, so that the pulverized coal consumption on the coal dust feed-line locating for each coal power flowmeter control.
Further, the controller is electrically connected with first tripper, second tripper respectively, for controlling
The low nitrogen of the dore furnace sprays into the different raw material dosages of the tertiary-air pipe penetrating point of point and the tertiary-air pipe
Feeding.
Further, the first order cyclone cylinder of the described first sub- whirlwind cartridge module and the second sub- whirlwind cartridge module exports
Place has also been connected respectively the first windmill and the second windmill by pipeline, and first windmill and the second windmill are connected by pipeline
It is connected to exhaust emissions processing unit, the pipeline locating for the exhaust emissions processing unit is equipped with sensor module, described
Sensor module includes NOx sensor and carbon monoxide transducer, and the sensor module is electrically connected with the controller
It connects.
Further, the bottom end of the decline furnace body and the described first sub- whirlwind cartridge module and the second sub- cyclone cylinder group
The 6th grade of cyclone cylinder junction in part is equipped with ammonium hydroxide and sprays into point, and the ammonium hydroxide sprays into point and connect by pipeline with ammonia water tank, institute
It states and is connected with ammonium hydroxide volume control device on the pipeline locating for ammonia water tank, the ammonium hydroxide volume control device and the control
Device electrical connection, two ammonium hydroxide spray at point and are equipped with four spray guns.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the denitrification apparatus proposed in the utility model first embodiment.
Fig. 2 is dore furnace in the denitrification apparatus proposed in the utility model first embodiment, cyclone cylinder and tertiary air pipe portion
The structural schematic diagram divided.
Fig. 3 is the facing structure frame that furnace bottom connection is decomposed in the denitrification apparatus proposed in the utility model first embodiment
Figure.
Fig. 4 is the side view structure frame that furnace bottom connection is decomposed in the denitrification apparatus proposed in the utility model first embodiment
Figure.
Fig. 5 is the structural block diagram of the denitrification apparatus proposed in the utility model first embodiment.
Fig. 6 is the structural schematic diagram of the denitrification apparatus proposed in the utility model second embodiment.
Fig. 7 is the structural block diagram of the denitrification apparatus proposed in the utility model second embodiment.
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 cyclone cylinder 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 cyclone cylinder, 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 a large amount of burnings of coal dust in rotary kiln are so that largely generate the tail of the pollutants such as nitrogen-containing oxide in rotary kiln kiln tail
Gas, tail gas after the rising passway of dore furnace by entering in cyclone cylinder, and in its cyclone cylinder after being risen in cyclone cylinder
Exit is discharged by exhaust emission pipeline, at this time since the amount of nitrogen oxides in tail gas is higher, so that its tail gas is arranged
Put the nitrogen in tail gas beyond national standard, generated when by using denitrification apparatus provided in this embodiment for manufacture of cement
Oxide carries out denitration process.
Fig. 1 to Fig. 5 is please referred to, the denitrification apparatus 10 provided in the first embodiment of the utility model, including rotary kiln 20, set
Dore furnace 30 above 21 smoke-box of kiln tail of rotary kiln 20, the tertiary-air pipe 40 being connect respectively with dore furnace 30 and cyclone cylinder 50,
And the pulverized coal bin 60 of coal dust is provided for rotary kiln 20 and dore furnace 30.
Wherein, rotary kiln 20 includes being set to the kiln tail 21 and be set to front end and pulverized coal bin 60 that end is connect with dore furnace 30
The kiln hood 22 of connection is wherein equipped with kiln hood burner at kiln hood 22, the raw material fed from dore furnace 30 are transported by kiln tail 21
To kiln hood 22, oxygen content is high in the environment as locating for kiln hood burner, so that kiln hood burner is by coal dust and mixes
The air of conjunction carries out full combustion so that raw material calcining is clinker, and is delivered to grate-cooler at kiln hood 22 and is cooled down.Wherein
20 calcination temperature of rotary kiln is 1350-1450 degree, and kiln hood burner makes it generate a large amount of nitrogen-containing oxides due to full combustion
Tail gas, and 21 smoke-box of kiln tail of rotary kiln 20 is moved to from the kiln hood of rotary kiln 20 22 with negative pressure, simultaneously because kiln hood burner
The full combustion oxygen content that makes it be located at the kiln tail 21 of end it is lower, oxygen content is generally 2 in 21 tail gas of kiln tail
~3%, kiln tail 21 is in anaerobic condition at this time.
Wherein, dore furnace 30 includes rising furnace body 31 and decline furnace body 32, wherein rising bottom end and the rotary kiln 20 of furnace body 31
21 smoke-box of kiln tail connection, decline furnace body 32 top with rise furnace body 31 top connect, and rise furnace body 31 with decline furnace
Between body 32 bending be in 180 degree, decline furnace body 32 bottom end by a three-way connector respectively be located at its left and right ends rotation
Two the 6th grade of cyclone cylinders (C6A cyclone cylinder, C6B cyclone cylinder) of air duct 50 connect, and form updraught inside kindling body 31 thereon
Road declines and forms decline air duct inside furnace body 32, after the tail gas of the kiln tail 21 of rotary kiln 20 is risen in rising furnace body 31,
Decline furnace body 32 in declined after move in cyclone cylinder 50, and in cyclone cylinder 50 rise after by the first of cyclone cylinder 50
The discharge of grade cyclone cylinder exit, wherein the furnace body length of dore furnace 30 is longer, in the present embodiment, specially 155 meters.
Wherein rise furnace body 31 and is located at two groups of tertiary-air pipes being connected with above 21 smoke-box of kiln tail positioned at its left and right ends
40, two groups of low nitrogen that the tapering of the rising furnace body 31 in dore furnace 30 is equipped with positioned at its left and right ends spray into point 311, low nitrogen spray
Access point 311 is connect by corresponding feed-line with cyclone cylinder 50 and pulverized coal bin 60 respectively, and the raw material in cyclone cylinder 50 can at this time
Be transported through low nitrogen by feed-line and spray into point 311 and feed to dore furnace 30, the coal dust in the pulverized coal bin 60 can
Be transported through low nitrogen by coal dust feed-line and spray into point 311 and feeds to dore furnace 30.Cyclone cylinder 50 and coal at this time
The raw material and coal dust that powder cabin 60 is fed can be sprayed at point 311 in low nitrogen and be fed after mixing into dore furnace 30.
Wherein it should be pointed out that in the present embodiment, left and right ends can be indicated by the side A, B respectively, for example, being located at left end
Low nitrogen spray into point 311 and can be written as the low nitrogen in the side A and spray into point 311A, spray into point 311 positioned at the low nitrogen of right end and can be written as the low nitrogen in the side B and spray
Access point 311B.Wherein, cyclone cylinder 50 includes two groups of sub- whirlwind cartridge modules positioned at 30 left and right ends of dore furnace, is respectively to be located at
The sub- whirlwind cartridge module 51 of the first of 30 left and right ends of dore furnace and the second sub- whirlwind cartridge module 52, wherein it should be pointed out that such as
Fig. 4 is the structural schematic diagram of the bottom of dore furnace 30 shown in 5, wherein low nitrogen sprays into point 311 close to 21 smoke-box of kiln tail, first
Level V cyclone cylinder in sub- whirlwind cartridge module 51 sprays into point 311A by feed-line nitrogen low with the corresponding side A and connect,
Level V cyclone cylinder in second sub- whirlwind cartridge module 52 sprays into point 311B by feed-line nitrogen low with the corresponding side B and connects
It connects.It is wherein attached for conveying tapering of the feed-line of raw material directly with dore furnace 30, coal dust feed-line and conveying
The side wall of pipeline is connected, and the point of coal dust feed-line and feed-line sprays into point close to low nitrogen, while the coal dust is defeated
The diameter for sending the diameter of pipeline to be less than feed-line, and two sides are connected separately with sub- coal dust feed-line on every feed-line,
When the coal dust conveyed in two strip coal dust feed-lines at this time is fed into feed-line, the coal dust of coal dust feed-line can be with
Raw material in feed-line spray into 311 feeding of point into dore furnace 30 by low nitrogen after mixing.
Wherein since the oxygen content of 21 smoke-box of kiln tail is lower, and tertiary-air pipe 40 and 30 point of dore furnace are located at low nitrogen
311 tops of point are sprayed into, so that the tertiary air introduced in tertiary-air pipe 40 is located at the top of dore furnace 30, can not be sprayed into for low nitrogen
Tertiary air is provided at point 311, so that the oxygen content that the low nitrogen sprays at point 311 is lower, low nitrogen is sprayed at point 311 and fed at this time
Coal dust burn under anaerobic condition and generate a large amount of carbon monoxide, carbon monoxide is strong reductant, can will be in 21 gas of kiln tail
Nitrogen oxides is reduced into nitrogen, while carbon monoxide is then oxidized to carbon dioxide while releasing heat, and specific chemistry is anti-
Answer formula are as follows: CO+NO → CO2+1/2N2, this chemical reaction can be rapidly completed by the promotion of high temperature and the catalysis of raw material, therefore divided
Reducing atmosphere needed for 30 tapering of furnace forms denitration is solved, so that 30 tapering of dore furnace forms denitration reducing zone.
Wherein, two groups of tertiary-air pipes 40 are located at the left and right ends that low nitrogen in dore furnace 30 sprays into 311 top of point, wherein
Specially 40 point of tertiary-air pipe is set to low nitrogen and sprays at 311 25 meters of top of point, and wherein tertiary-air pipe 40 is equipped with tertiary air
Pipe sprays into point 41, which sprays into point 41 and connect respectively by corresponding feed-line with cyclone cylinder 50 and pulverized coal bin 60,
Wherein the raw material in cyclone cylinder 50, which can also be carried out being transported through tertiary-air pipe by feed-line and spray into point 41, feeds to three times
In air hose 40, the coal dust in the pulverized coal bin 60 can also be carried out being transported through tertiary-air pipe penetrating point 41 by coal dust feed-line
In feeding to tertiary-air pipe 40.Wherein above-mentioned according to this, coal dust feed-line is set to feed-line and sprays into point close to tertiary-air pipe
41 position, so that the coal dust of feeding can be fed after mixing with raw material into tertiary-air pipe 40, wherein in tertiary-air pipe 40
The content of the oxygen of gas is 19~20%, so that tertiary-air pipe sprays into the normal oxy combustion of coal dust fed at point 41, and is produced
Raw nitrogen oxides, at this time can be by reducing the coal dust straying quatity at tertiary-air pipe 40 to the greatest extent, to reduce the generation of nitrogen oxides
Amount, has ensured the effect of denitration.
Wherein, cyclone cylinder 50 includes two groups of sub- whirlwind cartridge modules positioned at 30 left and right sides of dore furnace, is respectively first
Sub- whirlwind cartridge module 51 and the second sub- whirlwind cartridge module 52, the first sub- whirlwind cartridge module 51 and the second sub- whirlwind cartridge module 52 are
Including six grades of cyclone cylinders, the first sub- whirlwind cartridge module 51 is followed successively by C1A, C2A, C3A, C4A, C5A, C6A whirlwind from top to bottom
Cylinder, the second sub- whirlwind cartridge module 52 are followed successively by C1B, C2B, C3B, C4B, C5B, C6B cyclone cylinder from top to bottom, wherein the first son rotation
One first tripper 511, first tripper are equipped in C5A cyclone cylinder (level V cyclone cylinder) feed opening in air duct component 51
511 be a three-port structure, and the feed inlet of the first tripper 511 is connect with C5A cyclone cylinder feed opening, the first tripper 511
Two discharge ports, which pass through feed-line respectively and are connected to the low nitrogen in the side A of dore furnace 30, sprays into the point 311A's and side A tertiary-air pipe 40A
Tertiary-air pipe sprays into point 41A, wherein C6A cyclone cylinder (the 6th grade of cyclone cylinder) feed opening in the first sub- whirlwind cartridge module 51 is logical
Feed-line is crossed to connect with 21 smoke-box of the side A kiln tail, the C6A cyclone cylinder in the first sub- whirlwind cartridge module 51 by three-way connector with
Decline furnace body 32 to connect.Wherein, the structure of the second sub- whirlwind cartridge module 52 is identical as the structure of the first sub- whirlwind cartridge module 51, the
The second tripper 521, successively above-mentioned, the second tripper 521 are equipped in C5B cyclone cylinder feed opening in two sub- whirlwind cartridge modules 52
Point is sprayed by the feed-line tertiary-air pipe that nitrogen low with the side B of dore furnace 30 sprays into the point 311B and side B tertiary-air pipe 40B respectively
The C6B cyclone cylinder feed opening of 41B connection, the second sub- whirlwind cartridge module 52 is connect by feed-line with 21 smoke-box of the side B kiln tail, the
C6B cyclone cylinder in two sub- whirlwind cartridge modules 52 is connect by three-way connector with decline furnace body 32.Wherein, the first sub- cyclone cylinder
The C6A cyclone cylinder of component 51, the second sub- whirlwind cartridge module 52 C6B cyclone cylinder feed opening by preheating after its temperature be 880
Degree.
In manufacture of cement, raw material are fed respectively to the first sub- whirlwind cartridge module 51 and the second sub- whirlwind cartridge module 52
In feeding inlet, pass through stage by stage pre- of the different cyclone cylinders of the first sub- whirlwind cartridge module 51 and the second sub- whirlwind cartridge module 52
Heat enters to the rising furnace body 31 of dore furnace 30 eventually by the C5A cyclone cylinder of the first sub- whirlwind cartridge module 51, declines furnace body 32
After enter to C6A cyclone cylinder, 21 smoke-box of kiln tail and the second sub- cyclone cylinder are entered by feed-line again in C6A cyclone cylinder
The C5B cyclone cylinder of component 52 enters to the rising furnace body 31 of dore furnace 30, C6B cyclone cylinder is entered to after declining furnace body 32, in C6B
21 smoke-box of kiln tail is entered by feed-line again in cyclone cylinder, wherein the first sub- whirlwind cartridge module 51 feeds raw material to decomposition
During furnace 30, the raw material in C5A cyclone cylinder pass through the sub-material of the first tripper 511, and part of it raw material pass through conveying
Pipeline sprays into point 311A by the low nitrogen in the side A and feeds into dore furnace 30, and a part of raw material are by conveyance conduit by the side A tertiary-air pipe
The tertiary-air pipe of 40A sprays into point 41A and feeds into the side A tertiary-air pipe 40A, and is transmitted to dore furnace by the side A tertiary-air pipe 40A
In 30, raw material arrive C6A cyclone cylinder, the life in C6A cyclone cylinder by rising furnace body 31, the decline furnace body 32 of dore furnace 30 at this time
Material is all fed into 21 smoke-box of the side A kiln tail.Second sub- whirlwind cartridge module 52 feeds raw material to the mistake of 21 smoke-box of the side B kiln tail
Journey is above-mentioned according to this, and this will not be repeated here.
In vent gas treatment, the tail gas of kiln tail 21 is reduced to nitrogen by the reducing zone in 30 tapering of dore furnace, further
Ground, tail gas, which enters behind decline air duct, enters to C6A cyclone cylinder, C6B cyclone cylinder by three-way connector, and successively in the first son rotation
By its first order cyclone cylinder (C1A cyclone cylinder, C1B whirlwind after being risen in air duct component 51, the second sub- whirlwind cartridge module 52
Cylinder) outlet discharge, wherein it should be pointed out that first tripper 511 and the second tripper 521 are electric with controller 70 respectively
The first tripper 511 and 521 pairs of the second tripper decomposition may be implemented by the different control signals that controller 70 is sent in connection
The low nitrogen of furnace 30 sprays into the feeding of the different raw material dosages of the tertiary-air pipe penetrating point 41 of point 311 and tertiary-air pipe 40.
Wherein, pulverized coal bin 60 is made of the first pulverized coal bin 61 and the second pulverized coal bin 62, and the first pulverized coal bin 61 passes through respectively
Coal dust feed-line sprays into point 41A with the tertiary-air pipe on kiln hood 22 and the side A tertiary-air pipe 40A and connect, and the second pulverized coal bin 62 is divided
Not Tong Guo low with the side the A nitrogen of coal dust feed-line spray on the low nitrogen penetrating side point 311B, B tertiary-air pipe 40B in the side point 311A, B three
Secondary air hose sprays into point 41B connection, wherein coal power flowmeter 80, coal power flowmeter 80 are equipped on each coal dust feed-line
Quantity be 5, the coal power flowmeter 80 be used for accurately control its conveying coal dust dosage.Wherein each coal power flowmeter 80
It is electrically connected respectively with controller 70, each coal power flowmeter 80 is sent a control signal to by controller 70 at this time, so that each
Coal power flowmeter 80 can control coal in its corresponding coal dust feed-line after receiving the control signal of the transmission of controller 70
Powder amount, to realize that the dosage for the coal dust for spraying into point 311 and tertiary-air pipe penetrating point 41 to kiln hood 22, low nitrogen controls.
Wherein, the cyclone cylinder exit in the first sub- whirlwind cartridge module 51 and the second sub- whirlwind cartridge module 52 also passes through pipeline
It is connected separately with the first windmill 91 and the second windmill 92, the first windmill 91 and the second windmill 92 are connected to tail gas by pipeline and arrange
Processing unit is put, is wherein provided with sensor on first windmill 91 and the second windmill 92 to the pipeline of exhaust emissions processing unit
Component 93, wherein the sensor module 93 includes NOx sensor and carbon monoxide transducer, for detecting in tail gas
The concentration of nitrogen oxides and carbon monoxide.Wherein, the sensor module 93 and controller 70 are electrically connected, and controller 70 is according to biography
The signal that sensor component 93 is sent can determine the concentration information of remaining nitrogen oxides and carbon monoxide in tail gas to be discharged,
And feedback control signal is sent to the first tripper 511, the second tripper 521 and each coal power flowmeter according to concentration information
80, so that the dosage of raw material and coal dust variation in different location in control dore furnace 30 and rotary kiln 20, finally reduces nitrogen oxides
With the residual volume of carbon monoxide.Wherein, the first tripper 511, raw material blanking is to dore furnace 30 and three times in the second tripper 521
In the ratio of air hose 40, controller 70 can be adjusted flexibly according to kiln tail 21 and the ventilation of tertiary-air pipe 40 and temperature regime, with
Convenient for the predecomposition of raw material.
When specifically used, coal dust progress full combustion to generate at its kiln tail 21 big by the kiln hood burner in rotary kiln 20
The tail gas of nitrogen-containing oxide is measured, therefore has reduced the coal dust feed quantity of kiln hood 22 in the present embodiment to the greatest extent, kiln hood in the present embodiment
22 pulverized coal consumption accounts for the 35-40% of total dosage, and the coal dust feed quantity by reducing kiln hood 22 reduces the generation of nitrogen oxides,
Further, kiln tail 21 is due to lacking oxygen, so that its 21 smoke-box of kiln tail forms an anaerobic environment, bores at this time in dore furnace 30
The low nitrogen in portion sprays into 311 feeding coal dust of point, and the pulverized coal consumption that low nitrogen sprays into point 311 in the present embodiment accounts for the 50-65% of total dosage,
The coal dust fed at this time produces under reducing atmosphere and the carbon monoxide of strong reducing property, and carbon monoxide can continue and kiln tail 21 at this time
Reaction of nitrogen oxides in tail gas so that nitrogen oxides is reduced into nitrogen, denitration reaction can until its carbon monoxide exhaust for
Only.Further, all tail gas are carrying out cyclone cylinder 50 after declining air duct, and due to the first windmill 91 and the second windmill 92
The negative pressure of generation to move in exhaust emissions processing unit, and the sensor module 93 on feed-line obtains nitrogen oxidation at this time
The concentration information of object and carbon monoxide is simultaneously sent to controller 70.
Wherein, when the concentration that controller 70 gets nitrogen oxide in tail gas is more than pre-set level, then illustrate low nitrogen spray
Pulverized coal consumption in access point 311 is less, and the pulverized coal consumption in kiln hood 22 and tertiary-air pipe 40 is more, so that its reducing zone generated
The content of carbon monoxide is less, so that the content of the nitrogen oxides generated is more, when denitration reaction exhausts carbon monoxide at this time, also
Remain a large amount of nitrogen oxides, controller 70 sends feedback control signal to each coal power flowmeter 80, so that defeated at this time
It send the coal dust amount for spraying into point 311 to low nitrogen to increase, while reducing the coal dust amount of kiln hood 22 and tertiary-air pipe 40 of being delivered to, it both can be with
Ensure that nitrogen oxides meets national standard, and the residual volume of carbon monoxide can be reduced.
Wherein, when the concentration that controller 70 gets carbon monoxide in tail gas is more than pre-set level, then illustrate low nitrogen spray
Pulverized coal consumption in access point 311 is more, and the pulverized coal consumption in kiln hood 22 and tertiary-air pipe 40 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 70 sends a control signal to each coal power flowmeter at this time
80, so that being delivered to low nitrogen sprays into the coal dust amount reduction of point 311, while increasing the coal for being delivered to kiln hood 22 and tertiary-air pipe 40
Powder amount.The concentration information of controller 70 is sent by the sensor module 93 obtained at this time nitrogen oxides and carbon monoxide, hair
Send feedback control signal into each coal power flowmeter 80, so that it can feed back to the different positions in dore furnace 30 and rotary kiln 20
The variation of the dosage for the coal dust set to reduce the residual volume of carbon monoxide, while ensuring that nitrogen oxides meets discharge standard.
In the present embodiment, sprayed respectively with kiln hood 22, the low nitrogen in the side the A low nitrogen penetrating side point 311A, B by the pulverized coal bin 60 of setting
The tertiary-air pipe that the tertiary-air pipe of access point 311B, A side tertiary-air pipe 40A sprays into the point 41A and side B tertiary-air pipe 40B sprays into point 41B
It is connected at five, and the first pulverized coal bin 61 sprays into point 41A with the tertiary-air pipe of kiln hood 22 and the side A tertiary-air pipe 40A respectively and connect, the
Nitrogen low with the side A sprays into the tertiary-air pipe that the low nitrogen in the side point 311A, B sprays into the side point 311B, B tertiary-air pipe 40B to two pulverized coal bins 62 respectively
Point 41B connection is sprayed into, allows the pulverized coal consumption of its dore furnace 30 and kiln hood 22 to optimize adjustment respectively, in dore furnace
The coal dusts to burn in 30 divide two-way to enter, and part of it coal dust enters 311 feedings to 30 tapering of dore furnace by low nitrogen coal powder injection, so that
Coal dust generates reducing atmosphere in 21 flue gas anoxycausis of kiln tail, restores the nitrogen oxides in 21 tail gas of kiln tail；Another part coal dust
41 feeding of point is sprayed by the tertiary-air pipe of tertiary-air pipe 40, the tertiary air entered with tertiary-air pipe 40 mixes, so that its coal dust
The full combustion in dore furnace 30.And since the pulverized coal consumption that its low nitrogen sprays into point 311 and kiln hood 22 is larger, the wherein prior art
In, the coal dust of low nitrogen penetrating point 311 and kiln hood 22 is all made of a pulverized coal bin 60 and is conveyed, so that the coal in its pulverized coal bin 60
Powder is easily too fast to be used up, and makes it difficult to increase the pulverized coal consumption that low nitrogen sprays into point 311.In the present embodiment, low nitrogen sprays into 311 Hes of point
The coal dust of kiln hood 22 is conveyed by the first pulverized coal bin 61 and the second pulverized coal bin 62 respectively, so that coal dust too fast will not be used up, together
When two pulverized coal bins 60 will not influence the feed flow of coal dust feed-line.The coal dust for allowing to increase the second pulverized coal bin 62 is used
Amount is to increase the coal dust amount that low nitrogen sprays into point 311, while it is single that the low nitrogen of dore furnace 30, which sprays into 311 coal dusts of point, in the prior art
Only pipeline is injected to dore furnace 30, and raw material are also that independent pipeline enters dore furnace 30, two inlet points in dore furnace 30
It is not together, so that 30 local temperature of dore furnace is too high after causing coal dust to spray into, pulverized coal consumption can not be promoted.In the present embodiment,
The low nitrogen penetrating point 311 of dore furnace 30 enters dore furnace 30 after may make coal dust to mix with raw material together again, avoids dore furnace
30 localized hyperthermias can increase the pulverized coal consumption that low nitrogen sprays into 311 feeding of point, at this time to increase carbon monoxide in reducing atmosphere
Content realizes the complete denitration of nitrogen oxide in tail gas.Simultaneously because tertiary-air pipe 40 is set to 30 top of dore furnace, so that three times
The tertiary air introduced in air hose 40 is located at the top of dore furnace 30, and in the present embodiment, 40 point of tertiary-air pipe is set on the spray of low nitrogen
At 311 25 meters of top of access point, tertiary air is provided so that can not spray into for low nitrogen at point 311, so that the low nitrogen sprays into point 311
The oxygen content at place is lower, and oxygen content is 2-3% in the utility model, in 21 smoke-box tail gas of kiln tail, so that in dore furnace
30 taperings construct an anoxycausis environment, so that coal dust is burnt under 30 tapering anoxia condition of dore furnace and generate carbon monoxide, produce
Reducing atmosphere needed for raw denitration, while in the prior art, 40 point of tertiary-air pipe is set to low nitrogen and sprays into 311 5 meters of top of point
Place, therefore the present embodiment is compared with the prior art, by increase by 40 point of tertiary-air pipe and low nitrogen spray between point 311 away from
From generating carbon monoxide so that allowing coal dust to burn under anaerobic environment there are the sufficient time, and have sufficient time and tail gas
In nitrogen oxides react, improve denitration efficiency.In the present embodiment, since coal dust and raw material point are mixed into dore furnace
30, the pulverized coal consumption that low nitrogen sprays into point 311 is more than the prior art, so that generating enough Carbon monoxide reductions under anaerobic environment
Nitrogen oxides.Simultaneously because in the present embodiment compared with the prior art 155 meters of the total length of dore furnace 30 increases 30 meters, so that
Preheating denitration effect of the raw material in dore furnace 30 can be improved in longer rising furnace body 31 and decline furnace body 32 in it, drops
Low rotary kiln 20 calcines the load of raw material, reduces the pulverized coal consumption of kiln hood 22, reduces the generation of the nitrogen oxides total amount in kiln hood 22,
Improve denitration efficiency.Solve the problems, such as that existing coal dust denitration efficiency is not high so that in the present embodiment less need for even without
Ammonium hydroxide carries out denitration, and tail gas denitration directly can be completed by coal dust needed for manufacture of cement, reduce vent gas treatment cost.
Fig. 6, Fig. 7 are please referred to, for the denitrification apparatus 10a provided in the second embodiment of the utility model, second implementation
Example is more or less the same with the structure of first embodiment, and difference is, in the present embodiment, wherein the bottom end and first of decline furnace body 32
The 6th grade of cyclone cylinder C6A of sub- whirlwind cartridge module 51 and the second sub- whirlwind cartridge module 51 in the 6th grade of junction cyclone cylinder C6B
On be equipped with ammonium hydroxide and spray into point, ammonium hydroxide sprays into point and is connect with ammonia water tank 100 by pipeline, is wherein connected with ammonia aqua stream on pipeline
Amount control device 110, the ammonium hydroxide volume control device 110 are electrically connected with controller 70, wherein two ammonium hydroxide are sprayed at point and are all provided with
There are four spray guns.When controller 70 gets the signal of the transmission of sensor module 93, and determines remaining nitrogen oxides in tail gas,
Its controller 70 sends a control signal to ammonium hydroxide volume control device 110 according to the concentration information of nitrogen oxides, so that ammonium hydroxide sprays
Lance ejection ammonium hydroxide at access point simultaneously controls ammonia water spray flow, realizes ammonium hydroxide denitration.Wherein, in the present embodiment, when cement is raw
When the low nitrogen coal dust feed-line of producing line and flowmeter failure, meeting amount of nitrogen oxides can rise in tail gas, can penetrating ammonia appropriate
Water, to make denitration supply, to ensure that discharged nitrous oxides meet national standard.
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 (8)
1. a kind of denitrification apparatus, which is characterized in that including rotary kiln, the dore furnace above the kiln tail of the rotary kiln, respectively with
The tertiary-air pipe and cyclone cylinder and provide the pulverized coal bin of coal dust for the rotary kiln and the dore furnace that the dore furnace connects,
The tapering left and right ends of the dore furnace are respectively equipped with a low nitrogen and spray into point, and low nitrogen described in the dore furnace sprays into the top of point
Left and right ends are connected separately with a tertiary-air pipe, and the tertiary-air pipe is equipped with tertiary-air pipe and sprays into point, the pulverized coal bin
Including the first pulverized coal bin and the second pulverized coal bin, first pulverized coal bin passes through corresponding coal dust feed-line and the rotary kiln respectively
Kiln hood and the tertiary-air pipe in the tertiary-air pipe of left end spray into point connection, second pulverized coal bin is led to respectively
Cross the corresponding coal dust feed-line and the low nitrogen spray into point and in the tertiary-air pipe of right end described in three times
Air hose sprays into point connection.
2. denitrification apparatus according to claim 1, which is characterized in that the cyclone cylinder includes being located at described dore furnace or so
The sub- whirlwind cartridge module of the first of two sides and the second sub- whirlwind cartridge module, the first sub- whirlwind cartridge module and the second sub- cyclone cylinder group
Part includes six grades of cyclone cylinders, and one first sub-material is equipped in the level V cyclone cylinder feed opening in the first sub- whirlwind cartridge module
Device, first tripper are three-port structure, and two discharge ports of first tripper pass through corresponding feed-line respectively
The low nitrogen for being connected to left end in the dore furnace sprays into point and the tertiary air in the tertiary-air pipe of left end
Pipe sprays into point, is equipped with the second tripper in the level V cyclone cylinder feed opening in the second sub- whirlwind cartridge module, and described the
Two discharge ports of two trippers pass through the corresponding feed-line respectively and are connected to the described low of right end in the dore furnace
Nitrogen sprays into point and the tertiary-air pipe in the tertiary-air pipe of right end sprays into point.
3. denitrification apparatus according to claim 2, which is characterized in that the dore furnace includes rising furnace body, decline furnace body,
The bottom end for rising furnace body is connect with the kiln tail smoke-box of the rotary kiln, the top of the decline furnace body and the rising furnace body
Top connection, and bending is in 180 degree 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 corresponding described first sub- whirlwind cartridge module and the second sub- whirlwind cartridge module.
4. denitrification apparatus according to claim 3, which is characterized in that the 6th grade of rotation in the first sub- whirlwind cartridge module
Air duct feed opening is connect by the feed-line with the kiln tail smoke-box of the rotary kiln, and in the first sub- whirlwind cartridge module
Six grades of cyclone cylinders are connect by the three-way connector with the decline furnace body, the 6th grade in the second sub- whirlwind cartridge module
Cyclone cylinder feed opening is connect by the feed-line with the kiln tail smoke-box of the rotary kiln, in the second sub- whirlwind cartridge module
6th grade of cyclone cylinder is connect by the three-way connector with the decline furnace body.
5. denitrification apparatus according to claim 4, which is characterized in that be equipped with coal dust on each coal dust feed-line
Flowmeter, the denitrification apparatus further include a controller, and the controller connect with each coal power flowmeter respectively, is used for
Each coal power flowmeter is sent a control signal to, so that the coal dust conveying that each coal power flowmeter control is locating
Pulverized coal consumption on pipeline.
6. denitrification apparatus according to claim 5, which is characterized in that the controller respectively with first tripper,
The second tripper electrical connection, the low nitrogen for controlling the dore furnace spray into described the three of point and the tertiary-air pipe
Secondary air hose sprays into the feeding of the different raw material dosages of point.
7. denitrification apparatus according to claim 5, which is characterized in that the first sub- whirlwind cartridge module and second son
The first order cyclone cylinder exit of whirlwind cartridge module also passes through pipeline and has been connected respectively the first windmill and the second windmill, described
First windmill and the second windmill are connected to exhaust emissions processing unit, institute locating for the exhaust emissions processing unit by pipeline
Pipeline is stated equipped with sensor module, the sensor module includes NOx sensor and carbon monoxide transducer, described
Sensor module is electrically connected with the controller.
8. denitrification apparatus according to claim 5, which is characterized in that the bottom end of the decline furnace body and first son revolve
The 6th grade of cyclone cylinder junction in air duct component and the second sub- whirlwind cartridge module is equipped with ammonium hydroxide and sprays into point, the ammonium hydroxide spray
Access point is connect by pipeline with ammonia water tank, and ammonium hydroxide volume control device, institute are connected on the pipeline locating for the ammonia water tank
It states ammonium hydroxide volume control device to be electrically connected with the controller, two ammonium hydroxide spray at point and are equipped with four spray guns.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111256484A (en) * | 2020-03-17 | 2020-06-09 | 天瑞新登郑州水泥有限公司 | Cement kiln denitrification facility |
| CN112058064A (en) * | 2020-09-23 | 2020-12-11 | 南京凯盛国际工程有限公司 | Circulating spouting NOx emission reduction system and working method thereof |
| CN112426882A (en) * | 2020-11-30 | 2021-03-02 | 湘潭大学 | Method for removing nitrogen oxides in high-temperature flue gas by pulverized coal fluidization |
| CN112844003A (en) * | 2019-11-28 | 2021-05-28 | 中国科学院工程热物理研究所 | Multistage suspension preheater, control method and control method of cement clinker generation equipment |
| CN113880468A (en) * | 2020-07-01 | 2022-01-04 | 中国科学院工程热物理研究所 | Multistage suspension preheater, control method and control method of cement clinker generation equipment |
| CN115624847A (en) * | 2022-12-16 | 2023-01-20 | 河北省建筑材料工业设计研究院有限公司 | Accurate denitration control system of cement kiln self-adaptation |
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2018
- 2018-03-16 CN CN201820368441.0U patent/CN208275247U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112844003A (en) * | 2019-11-28 | 2021-05-28 | 中国科学院工程热物理研究所 | Multistage suspension preheater, control method and control method of cement clinker generation equipment |
| CN111256484A (en) * | 2020-03-17 | 2020-06-09 | 天瑞新登郑州水泥有限公司 | Cement kiln denitrification facility |
| CN113880468A (en) * | 2020-07-01 | 2022-01-04 | 中国科学院工程热物理研究所 | Multistage suspension preheater, control method and control method of cement clinker generation equipment |
| CN113880468B (en) * | 2020-07-01 | 2023-07-21 | 中国科学院工程热物理研究所 | Multistage suspension preheater, control method thereof and cement clinker generation equipment control method |
| CN112058064A (en) * | 2020-09-23 | 2020-12-11 | 南京凯盛国际工程有限公司 | Circulating spouting NOx emission reduction system and working method thereof |
| CN112426882A (en) * | 2020-11-30 | 2021-03-02 | 湘潭大学 | Method for removing nitrogen oxides in high-temperature flue gas by pulverized coal fluidization |
| CN115624847A (en) * | 2022-12-16 | 2023-01-20 | 河北省建筑材料工业设计研究院有限公司 | Accurate denitration control system of cement kiln self-adaptation |
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