CN207076306U - The device that a kind of sulfur trioxide in flue gas is administered - Google Patents
The device that a kind of sulfur trioxide in flue gas is administered Download PDFInfo
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- CN207076306U CN207076306U CN201720441955.XU CN201720441955U CN207076306U CN 207076306 U CN207076306 U CN 207076306U CN 201720441955 U CN201720441955 U CN 201720441955U CN 207076306 U CN207076306 U CN 207076306U
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- flue gas
- absorbent
- sulfur trioxide
- administered
- aerofoil
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Abstract
The device that a kind of sulfur trioxide in flue gas is administered, including dry state absorbent stocking system and sorbent injection system, also include fluidized wind system, the dry state absorbent stocking system includes absorbent powder cabin, the dust arrester being arranged at the top of absorbent powder cabin and the discharge valve located at absorbent powder cabin bottom；The sorbent injection system includes and continuous and quantitative conveying device, the first jet head sets being arranged in the exhaust gases passes of denitrification apparatus front end and the second jet head sets being arranged in the exhaust gases passes at denitration outlet end, discharge valve is connected by conveyance conduit with the input of continuous and quantitative conveying device, and the output end of continuous and quantitative conveying device is connected with the first jet head sets and the second jet head sets respectively by injection pipe.Dry state absorbent is accurately sprayed by continuous and quantitative conveying device, to reduce the sulfur trioxide concentration in flue gas, fluidized wind system avoids the dry state absorbent moisture absorption from luming.
Description
Technical field
It the utility model is related to denitrification apparatus, the device that especially a kind of sulfur trioxide in flue gas is administered.
Background technology
Boiler can produce the pollutants such as NOx, SO2, SO3 in coal-fired process, increasingly strict with national environmental standard,
Pollutant after stove in flue gas in recent years, as NOx, SO2, flue dust have obtained effective control, but SO3 present in flue gas is still
Do not removed efficiently.
SO3 toxicity is approximately 10 times of SO2, H2SO4 acid mists is easily combined to form with water, this acid mist is after chimney is discharged
After spreading in an atmosphere, serious destruction will be brought to the respiratory tract of people and surrounding plants, building, while can also be formed
Acid rain, it is very harmful.SO3 present in flue gas can improve the acid dew point of flue gas, for avoid sour gas condense cause flue and
The corrosion of equipment, exhaust gas temperature or anti-corrosion grade need to be improved, causes boiler efficiency to decline indirectly, increase cost of investment；Separately
Outside, when flue gas is by lime stone-gypsum wet absorption tower, flue-gas temperature rapidly reduces, and SO3 combines to form with water in flue gas
H2SO4 mist droplets, and removing ability of the absorption tower to H2SO4 droplets is low, causes chimney breast " Lan Yu " phenomenon often occur.
After power plant sets SCR denitration device, denitrating catalyst can promote sulfur dioxide to sulphur trioxide conversion.In denitration
In the presence of catalyst, 0.4%~1.6% sulfur dioxide is there are about to sulphur trioxide conversion, adds the dense of SO3 in flue gas
Degree, during compared to not installing SCR denitration device, sulfur trioxide content adds by about one time in the flue gas after catalyst layer.
Sulfur trioxide can generate ammonium hydrogen sulfate NH4HSO4 (ABS) with the ammonia reaction escaped in SCR reactors.Hydrogen sulfate
Ammonium can be deposited on Benitration reactor and air preheater surface, especially in cold section of air preheater.The ammonium hydrogen sulfate of liquid is that one kind is sticked
Property and all very strong material of corrosivity, adhere to flue or equipment surface, it is extremely difficult to remove, air preheater, flue or blower fan will be caused to be stained with
Dirty, corrosion, influences unit operation stability.And as ammonium hydrogen sulfate constantly adheres to fly ash granule, it will also cause the catalyst longevity
Order short, air preheater blocking and blower fan breathes heavily the problems such as quivering, have a strong impact on the normal operation of denitration efficiency, system equipment and unit.
The method of the sulfur trioxide of coal-fired flue-gas removing at present is mainly using the method for injection absorbent, is divided into dry state absorption
Agent gunite (DSI) and hygrometric state sorbent injection method (WSI).
The .9 of the patent No. 201510298152 Chinese patent proposes to spray calcium hydroxide or calcium oxide or oxidation into flue
Magnesium or magnesium hydroxide or sodium acid carbonate or concentrated crystal soda particle, dv=20~150 μm；The patent No. 201410721263.1
The absorbent of Chinese patent injection is calcium hydroxide or magnesia or magnesium hydroxide or sodium acid carbonate or sodium carbonate particle, dv<50
μm；The Chinese patent of the patent No. 200680033934.9 then increases additive, sodium absorbent on the basis of sodium absorbent is sprayed
Including trona or sodium bicarbonate particle, dv<40μm.Additive is selected from magnesium carbonate or calcium carbonate or magnesium hydroxide or calcium hydroxide
Or its mixture, dv=20~25 μm.
The absorbent of above-mentioned patented method injection is alkaline dry powder, belongs to DSI techniques.The suction of above-mentioned patented method injection
The stoichiometric proportion for receiving dosage and sulfur trioxide in flue gas is respectively (1.5~15):1 and (2~6):1 etc., use is more extensive
Absorbent conveying device, cause absorbent dosage larger, a large amount of absorbents of deposit need to be purchased, cost of investment is big, increases downstream
The burden of equipment fume treatment.
The .8 of the patent No. 201310044506 Chinese patent discloses one kind and trona slurries is sprayed in flue for taking off
Except the device and technique of sulfur trioxide in flue gas, mass concentration is 20%~30%, the change of the trona and sulfur trioxide of injection
Metering is learned than being 9:1 or so.This method belongs to WSI techniques, only has 87% to SO3 removal efficiency, absorbent dosage is big, cost
It is higher, and extrusion rate is relatively low, removal effect is poor.The Chinese patent of the patent No. 201610030666.0 discloses a kind of in denitration dress
Put the technique that stripping liquid is sprayed on the flue between the port of export and the pre- device of air.Liquid in sulfur trioxide unit volume flue gas
The emitted dose of absorbent is 1-20 times of the molal quantity that the position needs the sulfur trioxide deviate from.
Above-mentioned patented method belongs to hygrometric state sorbent injection method (WSI).WSI techniques include a set of absorbent producing device,
In order to prevent from absorbing the solidification of slurries deposition and blocking to pipeline, it is necessary to agitating device and rinse water system simultaneously.Increase
Maintenance and maintenance workload.
Therefore, it is necessary to develop that one kind can ensure absorbent and flue gas is full and uniform mixes, effective reduction absorbent dosage,
Maintenance and maintenance workload are reduced simultaneously, reduces operating cost, the system integration and absorbent conveying accurate measurement are improved, with maximum
Degree reduces sulfur trioxide concentration in flue gas, reduces equipment corrosion, solves air preheater and blocks etching problem, improves air preheater heat and hands over
Efficiency is changed, realizes the device of effective improvement of sulfur trioxide in flue gas after stove.
The content of the invention
Technical problem to be solved in the utility model is to provide the device that a kind of sulfur trioxide in flue gas is administered, and reduces and absorbs
Agent dosage, operation and repair and maintenance cost are reduced, solve the problems, such as discharge port blocking.
In order to solve the above technical problems, the technical solution of the utility model is：The device that a kind of sulfur trioxide in flue gas is administered,
Including dry state absorbent stocking system and sorbent injection system, in addition to fluidized wind system, the dry state absorbent storage system
System includes absorbent powder cabin, the dust arrester being arranged at the top of absorbent powder cabin and the discharge valve located at absorbent powder cabin bottom；
The sorbent injection system include with continuous and quantitative conveying device, be arranged in the exhaust gases passes of denitrification apparatus front end first
Jet head sets and the second jet head sets being arranged in the exhaust gases passes at denitration outlet end, discharge valve is by conveyance conduit and continuously
The input connection of quantitative conveyer, the output end of continuous and quantitative conveying device by injection pipe respectively with the first jet head sets
Connected with the second jet head sets；The fluidized wind system includes some gasification aerofoils for being arranged on absorbent powder cabin bottom outer wall, added
Thermal and air-supply arrangement, one end connection of the air-supply arrangement and air main, the other end of air main pass through Zhi Lufeng respectively
Pipe is connected with gasification aerofoil, and the heater is arranged on air main, and the inside of the gasification aerofoil is provided with cavity, and gasify wind
The one side of plate outwardly is provided with air inlet, and gasification aerofoil is provided with some air outlets towards the one side in absorbent powder cabin, air inlet with go out
The uniform cavity connection in air port.Utility model works principle：Three oxidations in system dynamic monitoring air preheater gas approach
Sulphur concentration, when measuring sulfur trioxide concentration value more than setting concentration value, then start the discharge valve of powder cabin bottom, by continuously fixed
Measure conveying device and dry state absorbent is accurately sprayed into the exhaust gases passes at denitrification apparatus front end and denitration outlet end, with drop
Sulfur trioxide concentration in low flue gas.In order to avoid the dry state absorbent moisture absorption is lumpd, uniformly gasify wind in absorbent powder cabin bottom
Plate, the air after heating enter absorbent powder cabin bottom by the air outlet of gasification board, and the absorbent for being deposited in orlop is carried out
Heating and gasification, avoid powdered absorbent caking feed opening being blocked.
As an improvement, the dust arrester is sack cleaner.
As an improvement, the absorbent powder cabin is provided be connected with canning cart plus powder pipeline, one end of powder pipeline is added to be provided with
Snap joint.
As an improvement, the discharge valve includes manual discharge gate and electronic discharge gate.
As an improvement, the air-supply arrangement is roots blower or compressed air.
As an improvement, first jet head sets are made up of some the first shower nozzles laid along exhaust gases passes width, described the
Two jet head sets are made up of some the second shower nozzles laid along exhaust gases passes width.
As an improvement, being divided into four groups of gasification aerofoil groups altogether, four groups of gasification aerofoil groups are uniformly laid in absorbent powder cabin bottom
The surrounding in portion, every group of gasification aerofoil group include 4 ~ 6 pieces of gasification aerofoils.
As an improvement, the gasification aerofoil is rectangle, the air outlet is in array distribution, a diameter of 10- of air outlet
15mm。
As an improvement, it is provided with high charge level detector and low Charge level measurer in the absorbent powder cabin.
As an improvement, the injection pipe is provided with distribution and computation device.
Caused beneficial effect is the utility model compared with prior art：
The utility model integrates absorbent storage and continuous and quantitative conveying device, forms modularization, unified to be given birth to by workshop
Postpartum assembles at the scene, ensures product total quality, improves the stability of system；Conveyed and divided using accurately continuous and quantitative
With metering device, absorbent dosage is reduced, avoids wasting；Device is integrated and precisely measures, and can effectively reduce absorbent dosage, together
When reduce maintenance and maintenance workload, reduce operating cost, at utmost reduce sulfur trioxide concentration in flue gas, it is rotten to reduce equipment
Erosion, solve air preheater and block etching problem, improve air preheater heat exchanger effectiveness.
Brief description of the drawings
Fig. 1 is the utility model structure diagram.
Fig. 2 is absorbent powder cabin polycrystalline substance schematic diagram.
Fig. 3 is gasification aerofoil medial surface schematic diagram.
Embodiment
With reference to Figure of description, the utility model is described in further detail.
As shown in figure 1, the device that a kind of sulfur trioxide in flue gas is administered, including the spray of dry state absorbent stocking system 1, absorbent
Penetrate system 2 and fluidized wind system 3.
The as shown in Figure 1 dry state absorbent stocking system 1, which includes absorbent powder cabin 11, is arranged on absorbent powder cabin 11 pushes up
The dust arrester in portion and the discharge valve located at the bottom of absorbent powder cabin 11.The bottom of absorbent powder cabin 11 is tapered, the present embodiment
Discharge valve include manual discharge valve 14 and electronic discharge valve 15, realize manual or automatic discharging.The dust arrester of the present embodiment
For sack cleaner 13.High charge level detector and low Charge level measurer are provided with the absorbent powder cabin 11；The absorbent powder
Storehouse 11 is provided be connected with canning cart plus powder pipeline 12, adds one end of powder pipeline 12 to be provided with snap joint；Dry state absorbent powder（dv
<80μm）It is transported to by canning cart near absorbent powder cabin 11, then carrying Pneumatic conveyer by tank car absorbs dry state
Agent is delivered in absorbent powder cabin 11, when low Charge level measurer sends alarm, is shown that the absorbent in powder cabin is used up soon, need to be added
Add absorbent powder；When high charge level detector sends alarm, then show that absorbent powder cabin 11 is loaded with soon, to stop feeding.
The as shown in Figure 1 sorbent injection system 2 include with continuous and quantitative conveying device 24, be arranged on denitrification apparatus before
The first jet head sets 21 and the second jet head sets 22 being arranged in the exhaust gases passes at denitration outlet end in the exhaust gases passes at end.
Discharge valve is connected by conveyance conduit with the input of continuous and quantitative conveying device 24, the output end of continuous and quantitative conveying device 24
It is connected respectively with the first jet head sets 21 and the second jet head sets 22 by injection pipe；First jet head sets 21 are by some along flue gas
The first shower nozzle composition that channel width is laid, second jet head sets 22 are by some the second shower nozzles laid along exhaust gases passes width
Composition.The injection pipe is provided with distribution and computation device 23.
As shown in Fig. 2 the fluidized wind system 3 includes some gasification aerofoils for being arranged on the bottom outer wall of absorbent powder cabin 11
33rd, heater 32 and air-supply arrangement.The air-supply arrangement of the present embodiment is two roots blowers 31, two roots blowers 31 with
One end connection of air main, the other end of air main are connected by branch road airduct with gasification aerofoil 33 respectively, the heater
32 are arranged on air main.The present embodiment is divided into four groups of gasification aerofoil groups altogether, and four groups of gasification aerofoil groups are uniformly laid in absorption
The surrounding of the bottom of agent powder cabin 11, every group of gasification aerofoil group include 4 ~ 6 pieces of gasification aerofoils 33.The gasification aerofoil 33 is rectangle,
It is internally provided with cavity, the one side of gasification aerofoil 33 outwardly is provided with air inlet, and the aerofoil 33 that gasifies is towards one in absorbent powder cabin 11
Face is provided with some air outlets 331, and air inlet connects with the uniform cavity of air outlet；As shown in figure 3, the air outlet is in array point
Cloth, a diameter of 10-15mm of air outlet 331.It is uniform in the bottom of absorbent powder cabin 11 in order to avoid the dry state absorbent moisture absorption is lumpd
Gasify aerofoil 33, and the air after heating enters the bottom of absorbent powder cabin 11 by the air outlet of gasification board, to being deposited in orlop
Absorbent is heated and gasified, and avoids powdered absorbent caking feed opening being blocked.
It is of the present utility model to be a little：
（1）Absorbent storage and continuous and quantitative conveying device 24 are integrated, form modularization, it is unified by after Workshop Production
Assembling, ensure product total quality, improve the stability of a system, reduce investment, operation and repair and maintenance cost；
（2）Using the conveying of accurately continuous and quantitative and distribution and computation device, emitted dose is to need to take off in unit volume flue gas
Except 1-8 times of the mole of sulfur trioxide, required absorption can be precisely controlled according to the sulfur trioxide concentration value monitored
Agent emitted dose, ensure that absorbent fully reacts with sulfur trioxide in flue gas, reduce absorbent dosage, avoid wasting, reduce operation
Cost.
（3）Dry state absorbent is sprayed on the flue at denitrification apparatus front end and denitration outlet end respectively, at utmost
Sulfur trioxide concentration in flue gas is reduced, dry state absorbent is sprayed into denitrification apparatus front end, can be reduced before denitrification apparatus three in flue gas
Sulfur oxide concentration, sulfur trioxide and the ammonium hydrogen sulfate of the ammonia reaction generation viscosity sprayed into are avoided, catalyst blockage is caused, makes catalysis
Agent loses activity；In denitrification apparatus rear end penetrating dry state absorbent, reduction flue gas after sulfur trioxide concentration, set after stove can be avoided
It is standby（Such as air preheater, blower fan）Corrosion, solve air preheater and block etching problem, improve air preheater heat exchanger effectiveness.
Claims (10)
1. the device that a kind of sulfur trioxide in flue gas is administered, including dry state absorbent stocking system and sorbent injection system, it is special
Sign is：Also include fluidized wind system, the dry state absorbent stocking system includes absorbent powder cabin, is arranged on absorbent powder cabin
The dust arrester at top and the discharge valve located at absorbent powder cabin bottom；The sorbent injection system conveys including continuous and quantitative
Device, the first jet head sets being arranged in the exhaust gases passes of denitrification apparatus front end and it is arranged on the flue gas at denitration outlet end and leads to
The second jet head sets in road, discharge valve are connected by conveyance conduit with the input of continuous and quantitative conveying device, and continuous and quantitative is defeated
The output end of device is sent to be connected respectively with the first jet head sets and the second jet head sets by injection pipe；The fluidized wind system includes
Some gasification aerofoil, heater and air-supply arrangements for being arranged on absorbent powder cabin bottom outer wall, the air-supply arrangement and main wind
One end connection of pipe, the other end of air main are connected by branch road airduct with gasification aerofoil respectively, and the heater is arranged on
On air main, the inside of the gasification aerofoil is provided with cavity, and the one side of gasification aerofoil outwardly is provided with air inlet, and the aerofoil that gasifies is towards suction
The one side received in agent powder cabin is provided with some air outlets, and air inlet connects with the uniform cavity of air outlet.
2. the device that a kind of sulfur trioxide in flue gas according to claim 1 is administered, it is characterised in that：The dust arrester is
Sack cleaner.
3. the device that a kind of sulfur trioxide in flue gas according to claim 1 is administered, it is characterised in that：The absorbent powder cabin
Provided be connected with canning cart plus powder pipeline, one end of powder pipeline is added to be provided with snap joint.
4. the device that a kind of sulfur trioxide in flue gas according to claim 1 is administered, it is characterised in that：The discharge valve includes
Manual discharge gate and electronic discharge gate.
5. the device that a kind of sulfur trioxide in flue gas according to claim 1 is administered, it is characterised in that：The air-supply arrangement is
Roots blower or compressed air.
6. the device that a kind of sulfur trioxide in flue gas according to claim 1 is administered, it is characterised in that：First jet head sets
It is made up of some the first shower nozzles laid along exhaust gases passes width, second jet head sets are laid by some along exhaust gases passes width
The second shower nozzle composition.
7. the device that a kind of sulfur trioxide in flue gas according to claim 1 is administered, it is characterised in that：It is divided into four groups of gas altogether
Wind transmission plate group, four groups of gasification aerofoil groups are uniformly laid in the surrounding of absorbent powder cabin bottom, and every group of gasification aerofoil group includes 4 ~ 6 pieces
Gasify aerofoil.
8. the device that a kind of sulfur trioxide in flue gas according to claim 1 is administered, it is characterised in that：It is described gasification aerofoil be in
Rectangle, the air outlet are in array distribution, a diameter of 10-15mm of air outlet.
9. the device that a kind of sulfur trioxide in flue gas according to claim 1 is administered, it is characterised in that：The absorbent powder cabin
It is interior to be provided with high charge level detector and low Charge level measurer.
10. the device that a kind of sulfur trioxide in flue gas according to claim 1 is administered, it is characterised in that：The injection pipe
It is provided with distribution and computation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720441955.XU CN207076306U (en) | 2017-04-25 | 2017-04-25 | The device that a kind of sulfur trioxide in flue gas is administered |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720441955.XU CN207076306U (en) | 2017-04-25 | 2017-04-25 | The device that a kind of sulfur trioxide in flue gas is administered |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207076306U true CN207076306U (en) | 2018-03-09 |
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ID=61436301
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720441955.XU Expired - Fee Related CN207076306U (en) | 2017-04-25 | 2017-04-25 | The device that a kind of sulfur trioxide in flue gas is administered |
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| CN (1) | CN207076306U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106861375A (en) * | 2017-04-25 | 2017-06-20 | 广州冉升环保工程有限公司 | The device and method that a kind of sulfur trioxide in flue gas is administered |
| CN109173695A (en) * | 2018-10-17 | 2019-01-11 | 浙江德创环保科技股份有限公司 | A kind of the sulfur trioxide removing system and removal methods of coal-fired flue-gas |
| CN110090523A (en) * | 2019-06-05 | 2019-08-06 | 山东国舜建设集团有限公司 | One kind being used for the quenched reforming apparatus of sintering flue gas |
-
2017
- 2017-04-25 CN CN201720441955.XU patent/CN207076306U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106861375A (en) * | 2017-04-25 | 2017-06-20 | 广州冉升环保工程有限公司 | The device and method that a kind of sulfur trioxide in flue gas is administered |
| CN109173695A (en) * | 2018-10-17 | 2019-01-11 | 浙江德创环保科技股份有限公司 | A kind of the sulfur trioxide removing system and removal methods of coal-fired flue-gas |
| CN109173695B (en) * | 2018-10-17 | 2023-08-25 | 浙江德创环保科技股份有限公司 | Sulfur trioxide removal system and method for coal-fired flue gas |
| CN110090523A (en) * | 2019-06-05 | 2019-08-06 | 山东国舜建设集团有限公司 | One kind being used for the quenched reforming apparatus of sintering flue gas |
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