CN116803472A - Dry-method particle desulfurization and denitrification agent production process and device thereof - Google Patents
Dry-method particle desulfurization and denitrification agent production process and device thereof Download PDFInfo
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- CN116803472A CN116803472A CN202310779419.0A CN202310779419A CN116803472A CN 116803472 A CN116803472 A CN 116803472A CN 202310779419 A CN202310779419 A CN 202310779419A CN 116803472 A CN116803472 A CN 116803472A
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- 239000008187 granular material Substances 0.000 claims 1
- 238000005469 granulation Methods 0.000 claims 1
- 230000003179 granulation Effects 0.000 claims 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 26
- 239000003546 flue gas Substances 0.000 abstract description 26
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 22
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 21
- 239000007789 gas Substances 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 238000004939 coking Methods 0.000 abstract description 5
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- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
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- 230000000694 effects Effects 0.000 description 5
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
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- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 2
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- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
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- 229910052717 sulfur Inorganic materials 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
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- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- WKXHZKXPFJNBIY-UHFFFAOYSA-N titanium tungsten vanadium Chemical compound [Ti][W][V] WKXHZKXPFJNBIY-UHFFFAOYSA-N 0.000 description 1
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- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention relates to a dry particle desulfurization and denitrification agent production process and a device thereof, which are characterized in that: the production process specifically comprises the following steps: s1: weighing and proportioning, S2: kneading, S3: and (3) forming and granulating, and S4: and (5) drying and discharging. The invention prepares the desulfurization and denitrification agent by taking the fly ash as the admixture, is suitable for flue gas desulfurization and denitrification under various production conditions of hot blast stoves, gas boilers, coke ovens, dry quenching and the like in the industries of thermal power, steel, building materials, coking, metallurgy, chemical industry and the like, and has high removal performance on sulfur dioxide and nitrogen oxides.
Description
Technical Field
The invention relates to the technical field of flue gas desulfurization and denitrification, in particular to a dry particle desulfurization and denitrification agent production process and a device thereof.
Background
Sulfur dioxide (chemical SO) 2 ) Is one of the most common and simplest sulfur oxides, one of the main atmospheric pollutants, is colorless and odorless, has a strong pungent odor, and can be sprayed by volcanic eruptions, and sulfur dioxide is also generated in many industrial processes, and because coal and petroleum generally contain sulfur elements, sulfur dioxide is generated when burning. Nitrogen oxides (chemical formula NO) x ) Mainly comprises NO and NO 2 、N 2 O、N 2 O 3 、N 2 O 4 And N 2 O 5 Nitrogen oxides as air pollutants are often referred to as NO and NO 2 The nitrogen oxides discharged by artificial activities are mostly from direct combustion of coal and automobile exhaust emission, and the thermal power industry is still the main NO x An emission source.
SO 2 And NO x The emission brings great harm to the health of soil, animals, plants, building cultural relics and human beings, the problems of acid rain, photochemical smog, ozone layer cavity and the like are extremely easy to cause when the emission is accumulated to a certain extent in the atmosphere, equipment is easy to erode in industrial production, the service life of a catalyst is influenced, personnel poisoning is easy to cause in daily life, and dizziness, shock and even death of patients are caused. Estimated to discharge 1 ton of SO per discharge 2 Can bring economic loss of 8000 Yuan people's bank notes, taking 2017 as an example, SO is discharged in year 2 Up to 875.3976 ten thousand tons, and causes 700 hundred million Yuan people's coins in total, thereby seeing that SO 2 And acid rain pollution become important environmental factors for restricting the economic coordination and stable development of China.
By the end of 2012, the technology for controlling sulfur dioxide emission can be classified into wet flue gas desulfurization, semi-dry flue gas desulfurization and dry flue gas desulfurization according to the process characteristics, including limestone-gypsum method, flue gas circulating fluidized bed method and ultra-fine desulfurizing agent powder injection method, and several desulfurization processes are pure, but in a large number of market applications, a lot of problems are reflected: if the desulfurization efficiency is lower, the equipment is huge, the system is complex, the investment is large, the occupied area is large, the operation technical requirement is high, and the competitiveness of the technical and economic performance is not strong enough.
At present, the flue gas denitration mainly comprises a Selective Catalytic Reduction (SCR), a selective non-catalytic reduction (SNCR), an oxidation denitration and the like. Ammonia as reducer and vanadium-tungsten-titanium system as catalyst to eliminate NO in tail gas x The technology is applied to a large scale in a power plant for example, has the characteristics of stable technology, high denitration efficiency and the like, but the application of the technology requires that the flue gas temperature reaches more than 350 ℃, and the temperature of sintering flue gas is usually about 120-180 ℃, for example, NO in the flue gas is removed by adopting the method x The flue gas must be heated to the reaction temperature, so that the energy consumption is huge and the economical efficiency is poor.
The active carbon adsorption method can simultaneously remove SO in the flue gas 2 And NO x Meanwhile, the process has the dust removing function, does not consume water and has no secondary pollution problem, but the investment and the operation cost are higher.Taking the Taiyuan steel mill in China as an example: 450m of Taiyuan Steel works 2 The Japanese activated carbon desulfurization technology for sintering machine introduction has an investment of about 4.7 hundred million yuan for the introduction device, a total cost of 1.5 hundred million yuan for normal operation year, and SO removal 2 The operation cost is more than 30 yuan per ton of sintered ore, and many enterprises cannot build or use the sintered ore.
In recent years, haze frequently appears in most areas of China, the national importance is attached to environmental protection and treatment (atmospheric pollution), the emission standard is stricter, the ecological environment organization revises the emission standard of pollutants for coking chemistry industry (GB 16171-2012), and specific indexes are specified: SO (SO) 2 ≤30mg/Nm 3 ；NO x ≤150mg/Nm 3 The method comprises the steps of carrying out a first treatment on the surface of the The particle is less than or equal to 15mg/Nm 3 Hydrogen sulfide is less than or equal to 5mg/m 3 . Regional index requirements of core areas of key control areas of Shandong, shanghai and the like: SO (SO) 2 ≤30mg/Nm 3 ；NO x ≤50mg/Nm 3 The method comprises the steps of carrying out a first treatment on the surface of the The particle content is less than or equal to 10mg/Nm 3 Hydrogen sulfide is less than or equal to 5mg/m 3 。
According to key technology and equipment localization planning points of the flue gas desulfurization of the thermal power plant and a plurality of comments about accelerating the industrialized development of the flue gas desulfurization of the thermal power plant, a flue gas desulfurization system is required to be equipped when a desulfurization device is built in a power plant with the sulfur content of more than or equal to 2 percent or a large-capacity unit (more than or equal to 200 MW).
According to the method, the environment technology provides the application of the high-efficiency catalyst in flue gas desulfurization and denitrification, the traditional process is transformed and upgraded, the research and development route of the series of products is implemented by all guidelines of national energy control and atmospheric pollution control, the bottleneck problem of restricting clean and efficient utilization of coal in China is further solved and broken, the autonomous research and development capability of the process, the system, the equipment and the material for clean and efficient utilization of coal is comprehensively improved, industrial application demonstration is realized, and the national air quality is ensured. Has wide market application prospect.
However, the existing preparation process of the desulfurization and denitrification agent is complicated, the cost is high, dust and carbon emission exist in the production process, and adverse effects are caused on the surrounding environment, so that the design of the production process and the device of the dry particle desulfurization and denitrification agent is particularly important for solving the problems.
Disclosure of Invention
The invention designs a dry particle desulfurization and denitrification agent production process and a device thereof for solving the problems, and the fly ash is used as an admixture for preparing the desulfurization and denitrification agent, which is suitable for flue gas desulfurization and denitrification under various production conditions of hot blast stoves, gas boilers, coke ovens, dry quenching and the like in the industries of thermal power, steel, building materials, coking, metallurgy, chemical industry and the like, and has high removal performance on sulfur dioxide and nitrogen oxides.
In order to solve the technical problems, the invention provides a dry particle desulfurization and denitrification agent production process, which is characterized by comprising the following steps of: the method specifically comprises the following steps:
s1: weighing and proportioning: the quick lime, cement and fly ash which are conveyed by the feeding system are weighed by the weighing and metering bin, so that the quick lime, cement and fly ash are sequentially conveyed into the kneader according to the proportion;
s2: mixing and kneading: kneading and shaping the raw materials by a kneader, and conveying the raw materials into a material distribution bin for storage;
s3: and (3) forming and granulating: the material kneaded and molded in the step S2 is sent into a strip extruder to be extruded into strips, and then a cutting tool is used for preparing preliminary material particles;
s4: drying and discharging: and (3) uniformly feeding the preliminary material particles cut in the step (S3) into a belt dryer through a material distributor, drying the preliminary material particles by the belt dryer, cutting the preliminary material particles again through a granulator to form a desulfurization and denitrification agent, and finally carrying out vibration discharge through a discharge vibrating screen.
Further: the second cutting in the step S4 is carried out to form the desulfurization and denitrification agent which is one or a combination of a plurality of cylindrical, clover and butterfly, the length of the agent is 10-30mm, and the diameter of the agent is 3-8mm.
The invention also provides a dry-method particle desulfurization and denitrification agent production device, which is characterized in that: including cement jar, quicklime jar, fly ash jar, weighing measurement storehouse, kneader, branch feed bin, strip extruder, cloth machine, belt dryer and ejection of compact shale shaker, weighing measurement storehouse respectively through a batching auger with quicklime jar and fly ash jar be linked together, cement jar be linked together with weighing measurement storehouse through first pipeline, first pipeline on install feed bin material loading fan, weighing measurement storehouse be linked together with the kneader through second pipeline, the branch feed bin set up under the kneader ejection of compact after through position adjustment mechanism, the branch feed bin in be provided with transportation flat-bed trolley, the strip extruder snatch the material from transportation flat-bed trolley through the arm, the cloth machine fix directly over belt dryer one end, the feed inlet of cloth machine be located under the strip extruder discharge gate, the other end of belt dryer link to each other with the feed inlet of granulator through the stock guide, the feed inlet of ejection of compact shale shaker be located under the granulator discharge gate.
Further: the second conveying pipeline is connected with the negative pressure pipeline conveying system, the negative pressure pipeline conveying system comprises a four-way switch valve fixed in the second conveying pipeline, two connectors of the four-way switch valve are communicated with the weighing and metering bin and the kneader through two ends of the second conveying pipeline, a third connector of the four-way switch valve is communicated with the vacuum pump, a fourth connector of the four-way switch valve is communicated with the pressure discharge pipeline, and the kneader is further provided with a pressure protection valve.
Still further: the strip extruder is characterized in that a cutting tool is arranged at a discharge hole of the strip extruder, and the cutting tool is connected with a cutting electric cylinder.
Still further: the utility model provides a divide feed bin including backup pad, the dustcoat body, crane, lift jar, transportation flatbed dolly and guide arm, the backup pad link to each other with position control mechanism, the dustcoat body set up at the top of backup pad and its right-hand member be open form, the guide way that is used for transporting flatbed dolly business turn over is also seted up to the right-hand member of backup pad, the backup pad pass through guide arm swing joint in the backup pad, the lower extreme and the backup pad fixed connection of guide arm, the crane through seting up the guiding hole sliding connection on itself on the guide arm, both ends are provided with the lug around transporting flatbed dolly, the top of crane is set up flutedly for the position of lug, the lift jar install in the bottom of backup pad and link to each other with the crane, the crane utilize the cooperation of recess and lug to leave the transportation flatbed dolly.
Still further: the position adjusting mechanism comprises two opposite side plates, two parallel sliding rails, a sliding block, a screw rod, a servo motor and a connecting piece, wherein the two opposite side plates are arranged, the supporting plate is connected to the sliding rail through the sliding block arranged at the bottom in a sliding manner, the screw rod is rotationally connected between the two side plates, one end of the screw rod is connected with the servo motor, the connecting piece is fixed at the bottom of the supporting plate, threaded through holes matched with the screw rod are formed in the connecting piece, and the supporting plate is connected to the screw rod through the threaded through holes in the connecting piece.
Still further: the upper end of the guide rod is detachably connected with an end cover, the end cover is connected with a buffer plate through a spring, the buffer plate is connected to the guide rod in a vertical sliding mode, and the spring surrounds the outer side of the guide rod.
Still further: the top of recess one side crane rotates and is connected with the limiting plate, the one end of limiting plate links to each other with the crane through the round pin axle, the vertical locking screw that is fixed with in top of recess opposite side crane, one side of limiting plate is seted up jaggedly for the position of locking screw, locking screw on be connected with gland nut, the lug pass through the limiting plate restriction in the recess.
Still further: the top of the discharging vibrating screen and the top of the kneader are respectively provided with a dust collecting cover, and the dust collecting covers are communicated with the powder recovery box through an exhaust pipeline.
After the structure is adopted, the fly ash is used as an admixture for preparing the desulfurization and denitrification agent, and the desulfurization and denitrification agent is suitable for flue gas desulfurization and denitrification under various production conditions of hot blast stoves, gas boilers, coke ovens, dry quenching and the like in the industries of thermal power, steel, building materials, coking, metallurgy, chemical industry and the like, and has high removal performance on sulfur dioxide and nitrogen oxides; the desulfurization and denitrification agent produced by the invention can remove sulfur dioxide and NO in the flue gas x Absorbing with calcium hydroxide to produce calcium sulfate and nitric acidThe calcium can effectively avoid secondary pollutants, and plays a role in increasing practical performance.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is a state diagram of the use of the present invention.
Fig. 2 is a perspective view of the structure of the present invention.
Detailed Description
The invention provides a dry particle desulfurization and denitrification agent production process, which specifically comprises the following steps:
s1: weighing and proportioning: the quick lime, cement and fly ash which are conveyed by the feeding system are weighed by the weighing and metering bin, so that the quick lime, cement and fly ash are sequentially conveyed into the kneader according to the proportion;
s2: mixing and kneading: kneading and shaping the raw materials by a kneader, and conveying the raw materials into a material distribution bin for storage;
s3: and (3) forming and granulating: the material kneaded and molded in the step S2 is sent into a strip extruder to be extruded into strips, and then a cutting tool is used for preparing preliminary material particles;
s4: drying and discharging: and (3) uniformly feeding the preliminary material particles cut in the step (S3) into a belt dryer through a material distributor, drying the preliminary material particles by the belt dryer, cutting the preliminary material particles again through a granulator to form a desulfurization and denitrification agent, and finally carrying out vibration discharge through a discharge vibrating screen.
The second cutting in the step S4 is performed to form the desulfurization and denitrification agent in the shape of one or more of a cylinder, a clover and a butterfly, wherein the length of the agent is 10-30mm, and the diameter of the agent is 3-8mm.
The invention prepares the desulfurization and denitrification agent by taking the fly ash as the admixture, is suitable for flue gas desulfurization and denitrification under various production conditions of hot blast stoves, gas boilers, coke ovens, dry quenching and the like in the industries of thermal power, steel, building materials, coking, metallurgy, chemical industry and the like, and has high removal performance on sulfur dioxide and nitrogen oxides.
The dry method particle desulfurization and denitrification agent production device comprises a cement tank 1, a quicklime tank 2, a fly ash tank 3, a weighing metering bin 4, a kneader 5, a distribution bin 6, a strip extruding machine 7, a distributing machine 8, a belt dryer 9 and a discharge vibrating screen 10, wherein the weighing metering bin is respectively communicated with the quicklime tank and the fly ash tank through a dosing auger 11, the cement tank is communicated with the weighing metering bin through a first conveying pipeline 12, a bin feeding fan 13 is mounted on the first conveying pipeline, the weighing metering bin is communicated with the kneader through a second conveying pipeline 14, the distribution bin is arranged right below the kneader after discharging through a position adjusting mechanism, a conveying flat trolley 15 is arranged in the distribution bin, the strip extruding machine grabs materials from the conveying flat trolley through a mechanical arm, the distributing machine is fixed right above one end of the belt dryer, a feed inlet of the distributing machine is located right below a discharge port of the strip extruding machine, the other end of the conveying flat trolley is connected with a discharge port of the granulating machine through a guide plate 17, and the discharge port of the granulating machine is located below the discharge port of the granulating machine.
The second conveying pipeline is connected with the negative pressure pipeline conveying system, the negative pressure pipeline conveying system comprises a four-way switch valve fixed in the second conveying pipeline, two connectors of the four-way switch valve are communicated with the weighing and metering bin and the kneader through two ends of the second conveying pipeline, a third connector of the four-way switch valve is communicated with the vacuum pump, a fourth connector of the four-way switch valve is communicated with the pressure discharge pipeline, and the kneader is further provided with a pressure protection valve. When feeding is needed, the vacuum pump is communicated with the kneader through the four-way switch valve, the inside of the kneader is vacuumized, the kneader is communicated with the weighing and metering bin through the switch valve after vacuumization is finished, powder in the weighing and metering bin automatically enters the kneader under the action of negative pressure, and when the vacuum degree in the kneader exceeds the limit, the pressure protection valve can be automatically opened to reduce the internal and external pressure difference, so that the self-protection effect is achieved, and unnecessary damage is prevented.
The cooling sleeve is arranged at the discharge hole of the strip extruding machine, one end of the cooling sleeve is communicated with the discharge hole of the strip extruding machine, the other end of the cooling sleeve is provided with the cutting tool, the cutting tool is connected with the cutting electric cylinder, and the cooling sleeve is connected with the cooling water circulation system. During operation cools off the long banding material of crowding through cooling sleeve, is convenient for the work of cutting of later stage, prevents to take place too much deformation when cutting, has played the effect that increases the practicality.
The distributing bin shown in fig. 2 comprises a supporting plate 6-1, an outer cover body 6-2, a lifting frame 6-4, lifting electric cylinders 6-6, a transporting flat trolley 15 and a guide rod 6-3, wherein the supporting plate is connected with a position adjusting mechanism, the outer cover body is arranged at the top of the supporting plate, the right end of the outer cover body is open, the right end of the supporting plate is also provided with a guide groove for the transporting flat trolley to enter and exit, the supporting plate is movably connected to the supporting plate through the guide rod, the lower end of the guide rod is fixedly connected with the supporting plate, the lifting frame is slidably connected to the guide rod through a guide hole arranged on the lifting frame, the front end and the rear end of the transporting flat trolley are provided with a convex block 15-1, the top of the lifting frame is provided with a groove relative to the position of the convex block, the lifting electric cylinders are arranged at the bottom of the supporting plate and are connected with the lifting frame, and the lifting frame utilizes the cooperation of the concave groove and the convex block to leave the transporting flat trolley from the ground through the effect of the lifting frame; the top of the transportation flat trolley is provided with a storage box, and the inner space of the storage box is divided into a plurality of storage areas through a plurality of partition plates. When the material is stored, the transportation flat trolley is jacked up by the lifting frame, and a plurality of material storage areas are transported to the position right below the discharge hole of the strip extruding machine by the position adjusting mechanism; when feeding is needed, the transporting flat trolley is contacted with the ground and is separated from the lifting frame to move to the grabbing position of the mechanical arm.
The position adjusting mechanism shown in fig. 2 comprises two oppositely arranged side plates 22, two parallel arranged slide rails 19, a slide block 18, a screw 21, a servo motor 23 and a connecting piece 20, wherein the support plate is connected on the slide rails in a sliding way through the slide block arranged at the bottom, the screw is rotationally connected between the two side plates, one end of the screw is connected with the servo motor, the connecting piece is fixed at the bottom of the support plate and provided with a threaded through hole matched with the screw, and the support plate is connected on the screw through the threaded through hole on the connecting piece
The upper end of the guide rod shown in fig. 2 is detachably connected with an end cover, the end cover is connected with a buffer plate through a spring, the buffer plate is connected to the guide rod in a vertical sliding mode, and the spring surrounds the outer side of the guide rod.
The top of recess one side crane is rotated and is connected with limiting plate 6-5 as shown in figure 2, the one end of limiting plate links to each other with the crane through the round pin axle, the vertical locking screw that is fixed with in top of recess opposite side crane, one side of limiting plate is seted up jaggedly for the position of locking screw, locking screw on be connected with gland nut, the lug pass through the limiting plate restriction in the recess.
The top of the discharging vibrating screen and the top of the kneader are respectively provided with a dust collecting cover, and the dust collecting covers are communicated with the powder recovery box through an exhaust pipeline.
The desulfurization and denitrification agent is prepared by compounding the technological processes of mixing, kneading, forming, granulating, drying and the like, carbon emission cannot be caused in the production process, the general specification is 3-8mm (cylindrical, clover and butterfly), the length is 10-30mm, and the desulfurization and denitrification agent can be matched with various working conditions. The desulfurization and denitrification agent produced by the invention can lead sulfur dioxide and NO in the flue gas to be mixed with each other x Calcium hydroxide is used for absorbing and generating calcium sulfate and calcium nitrate:
the catalyst is filled in the reactor, and after the flue gas flows through, sulfur dioxide, hydrogen sulfide and NO in the catalyst x The gas is absorbed by the catalyst, and is respectively reacted and solidified into calcium sulfate (gypsum), zinc sulfide and calcium nitrate solids, the whole process does not use water, waste water is not generated, and the need of whitening does not exist.
In the desulfurization and denitrification reactor, flue gas flows from the lower part to the upper part, the novel dry flue gas desulfurization and denitrification agent descends from the upper part to the lower part under the action of gravity, and contacts with the flue gas in a countercurrent way, so that the desulfurization and denitrification task is completed in one set of device, the reaction is not obvious in fluctuation of flue gas temperature reaction, and the desulfurization and denitrification efficiency is good at the room temperature of 350 ℃.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the invention without departing from the principles thereof are intended to be within the scope of the invention as set forth in the following claims.
Claims (10)
1. A dry particle desulfurization and denitrification agent production process is characterized in that: the method specifically comprises the following steps:
s1: weighing and proportioning: the quick lime, cement and fly ash which are conveyed by the feeding system are weighed by the weighing and metering bin, so that the quick lime, cement and fly ash are sequentially conveyed into the kneader according to the proportion;
s2: mixing and kneading: kneading and shaping the raw materials by a kneader, and conveying the raw materials into a material distribution bin for storage;
s3: and (3) forming and granulating: the material kneaded and molded in the step S2 is sent into a strip extruder to be extruded into strips, and then a cutting tool is used for preparing preliminary material particles;
s4: drying and discharging: and (3) uniformly feeding the preliminary material particles cut in the step (S3) into a belt dryer through a material distributor, drying the preliminary material particles by the belt dryer, cutting the preliminary material particles again through a granulator to form a desulfurization and denitrification agent, and finally carrying out vibration discharge through a discharge vibrating screen.
2. The dry granular desulfurization and denitrification agent production process according to claim 1, which is characterized in that: the second cutting in the step S4 is carried out to form the desulfurization and denitrification agent which is one or a combination of a plurality of cylindrical, clover and butterfly, the length of the agent is 10-30mm, and the diameter of the agent is 3-8mm.
3. A dry method granule SOx/NOx control agent apparatus for producing, its characterized in that: including cement jar (1), quicklime jar (2), fly ash jar (3), weighing measurement storehouse (4), kneader (5), divide feed bin (6), strip extruder (7), cloth machine (8), belt dryer (9) and ejection of compact shale shaker (10), weighing measurement storehouse respectively through a batching auger (11) with quicklime jar and fly ash jar be linked together, cement jar be linked together with weighing measurement storehouse through first pipeline (12), first pipeline on install feed bin material loading fan (13), weighing measurement storehouse be linked together with the kneader through second pipeline (14), divide the feed bin to set up under after the kneader ejection of compact through position adjustment mechanism, divide the feed bin in be provided with transportation flat-bed trolley (15), strip extruder snatch the material from transportation flat-bed trolley through the arm, the cloth machine fix directly over belt dryer one end, the feed inlet of extruder be located under the strip extruder discharge gate, the other end be located under the feed inlet of belt dryer (17), the feed inlet (16) is located the granulation of granulator under the feed inlet (16).
4. A dry granular desulfurization and denitrification agent production device according to claim 3, wherein: the second conveying pipeline is connected with the negative pressure pipeline conveying system, the negative pressure pipeline conveying system comprises a four-way switch valve fixed in the second conveying pipeline, two connectors of the four-way switch valve are communicated with the weighing and metering bin and the kneader through two ends of the second conveying pipeline, a third connector of the four-way switch valve is communicated with the vacuum pump, a fourth connector of the four-way switch valve is communicated with the pressure discharge pipeline, and the kneader is further provided with a pressure protection valve.
5. A dry granular desulfurization and denitrification agent production device according to claim 3, wherein: the strip extruder is characterized in that a cutting tool is arranged at a discharge hole of the strip extruder, and the cutting tool is connected with a cutting electric cylinder.
6. A dry granular desulfurization and denitrification agent production device according to claim 3, wherein: the distributing bin comprises a supporting plate (6-1), an outer cover body (6-2), a lifting frame (6-4), lifting cylinders (6-6), a transporting flat trolley (15) and a guide rod (6-3), wherein the supporting plate is connected with a position adjusting mechanism, the outer cover body is arranged at the top of the supporting plate, the right end of the outer cover body is open, a guide groove for the transporting flat trolley to enter and exit is formed in the right end of the supporting plate, the supporting plate is movably connected to the supporting plate through the guide rod, the lower end of the guide rod is fixedly connected with the supporting plate, the lifting frame is slidably connected to the guide rod through a guide hole formed in the lifting frame, protruding blocks (15-1) are arranged at the front end and the rear end of the transporting flat trolley, grooves are formed in the top of the lifting frame relative to the positions of the protruding blocks, the lifting cylinders are arranged at the bottom of the supporting plate and are connected with the lifting frame, and the lifting frame is matched with the roof of the transporting flat trolley through the grooves and the protruding blocks.
7. The dry granular desulfurization and denitrification agent production device according to claim 6, wherein: the position adjusting mechanism comprises two opposite side plates (22), two parallel sliding rails (19), a sliding block (18), a screw rod (21), a servo motor (23) and a connecting piece (20), wherein the supporting plate is arranged on the sliding rails through the sliding block arranged at the bottom, the screw rod is rotationally connected between the two side plates, one end of the screw rod is connected with the servo motor, the connecting piece is fixed at the bottom of the supporting plate, threaded through holes matched with the screw rod are formed in the connecting piece, and the supporting plate is connected onto the screw rod through the threaded through holes in the connecting piece.
8. The dry granular desulfurization and denitrification agent production device according to claim 6, wherein: the upper end of the guide rod is detachably connected with an end cover, the end cover is connected with a buffer plate through a spring, the buffer plate is connected to the guide rod in a vertical sliding mode, and the spring surrounds the outer side of the guide rod.
9. The dry granular desulfurization and denitrification agent production device according to claim 6, wherein: the top of recess one side crane rotates and is connected with limiting plate (6-5), the one end of limiting plate links to each other with the crane through the round pin axle, the vertical locking screw that is fixed with in top of recess opposite side crane, one side of limiting plate is seted up jaggedly for the position of locking screw, locking screw on be connected with gland nut, the lug pass through the limiting plate restriction in the recess.
10. A dry granular desulfurization and denitrification agent production device according to claim 3, wherein: the top of the discharging vibrating screen and the top of the kneader are respectively provided with a dust collecting cover, and the dust collecting covers are communicated with the powder recovery box through an exhaust pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310779419.0A CN116803472A (en) | 2023-06-29 | 2023-06-29 | Dry-method particle desulfurization and denitrification agent production process and device thereof |
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| CN202310779419.0A CN116803472A (en) | 2023-06-29 | 2023-06-29 | Dry-method particle desulfurization and denitrification agent production process and device thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117549527A (en) * | 2024-01-12 | 2024-02-13 | 江苏华侃核电器材科技有限公司 | High-radiation-resistant heat-shrinkable tube for nuclear power station and preparation method thereof |
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2023
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117549527A (en) * | 2024-01-12 | 2024-02-13 | 江苏华侃核电器材科技有限公司 | High-radiation-resistant heat-shrinkable tube for nuclear power station and preparation method thereof |
| CN117549527B (en) * | 2024-01-12 | 2024-04-19 | 江苏华侃核电器材科技有限公司 | High-radiation-resistant heat-shrinkable tube for nuclear power station and preparation method thereof |
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