CN111744362A - Ceramic industry comprehensive flue gas cooperative treatment system - Google Patents

Ceramic industry comprehensive flue gas cooperative treatment system Download PDF

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CN111744362A
CN111744362A CN202010704337.6A CN202010704337A CN111744362A CN 111744362 A CN111744362 A CN 111744362A CN 202010704337 A CN202010704337 A CN 202010704337A CN 111744362 A CN111744362 A CN 111744362A
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flue gas
desulfurizing tower
slaked lime
treatment system
tower
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官小猛
雷本喜
刘爱平
陆涵军
陈润基
蔺海燕
刘嘉丽
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Foshan Pulan Environemntal Engineering Co ltd
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Foshan Pulan Environemntal Engineering Co ltd
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    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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Abstract

The invention discloses a heald for ceramic industryClose flue gas cooperative treatment system, including the desulfurizing tower, the sack cleaner, lime hydrate feeding device, water jet equipment, recirculation device and draught fan, the bottom of desulfurizing tower is equipped with the air inlet, the top is equipped with the gas vent, lime hydrate feeding device and water jet equipment all communicate with the bottom of desulfurizing tower mutually, water jet equipment is higher than the intercommunication department of lime hydrate feeding device and desulfurizing tower with the intercommunication department of desulfurizing tower, the sack cleaner is linked together with the gas vent of desulfurizing tower, draught fan and sack cleaner intercommunication, recirculation device's one end is connected with the bottom of sack cleaner, the other end is connected with the bottom of desulfurizing tower. SO that the slaked lime and the SO in the flue gas2The corresponding components react to realize desulfurization; the water spraying device is arranged, so that a good reaction environment in the desulfurizing tower is ensured; the recycling device is arranged to return the particles to the desulfurizing tower for continuous reaction, thereby ensuring full desulfurization of the discharged materials, realizing ultralow emission without wastewater and obvious white feather and achieving the purpose of environmental protection.

Description

Ceramic industry comprehensive flue gas cooperative treatment system
Technical Field
The invention belongs to the field of dust removal and desulfurization equipment, and particularly relates to a comprehensive flue gas cooperative treatment system in the ceramic industry.
Background
Along with the development of society, people have stronger environmental awareness and the national environment protection is stronger, so the national industrial waste gas emission standard is higher; therefore, the emission treatment requirements of the existing waste gas are higher, especially for ceramic manufacturing enterprises, the emission requirements of the waste gas are stricter, and the sulfur-containing components in the exhaust gas are strictly controlled. However, when the industrial waste gas is treated by the existing partial desulfurization equipment, the gas is discharged after rapidly passing through the desulfurization tower, and the desulfurization rate is low, so that the sulfur content of the gas finally discharged into the atmosphere is higher, and the influence on the atmospheric environment is caused. Some exhaust gases also contain NOx, and direct discharge into the air also causes pollution.
Disclosure of Invention
The invention aims to provide a ceramic industry comprehensive flue gas cooperative treatment system capable of solving at least one of the problems.
According to one aspect of the invention, the comprehensive flue gas cooperative treatment system in the ceramic industry comprises a desulfurization tower, a bag-type dust remover, a slaked lime supply device, a water spraying device, a recycling device and an induced draft fan, wherein the bottom end of the desulfurization tower is provided with an air inlet, the top end of the desulfurization tower is provided with an air outlet, the slaked lime supply device and the water spraying device are both communicated with the bottom of the desulfurization tower, the communication position of the water spraying device and the desulfurization tower is higher than the communication position of the slaked lime supply device and the desulfurization tower, the bag-type dust remover is communicated with the air outlet of the desulfurization tower, the induced draft fan is communicated with the bag-type dust remover, one end of the recycling device is connected with the.
The invention has the beneficial effects that: by arranging the slaked lime supply device, slaked lime can be provided for the desulfurizing tower, SO that the slaked lime and SO in the flue gas2The corresponding components react to realize desulfurization; the water spraying device is arranged, and the sprayed water for reducing the temperature of the flue gas takes the particles which are violently turbulent and have large surface area as carriers, so that the particles are fully evaporated in the desulfurizing tower, and the good reaction environment in the desulfurizing tower is ensured; the recycling device is arranged, so that solid particles can be returned to the desulfurizing tower to continuously participate in reaction, the full desulfurization of discharged materials is ensured, no wastewater is generated, no obvious white feather phenomenon exists, the ultralow emission is realized, and the purpose of environmental protection is achieved.
In some embodiments, the desulfurizing tower includes tower body, venturi and intake pipe, and venturi locates the bottom of tower body, and is linked together with the tower body, is equipped with circulating fluidized bed in the tower body, and the intake pipe communicates with venturi's bottom, and the air inlet is located the intake pipe bottom, and the top of tower body is equipped with the end of giving vent to anger, and the end of giving vent to anger is the toper, and the upper end aperture of the end of giving vent to anger is less than. Therefore, the venturi tube is arranged, so that the flue gas can flow to the circulating fluidized bed of the tower body in an accelerated manner, materials in the circulating fluidized bed interact with flowing air flow to generate violent turbulence and mixing, the materials are in full contact, floccules are continuously formed and return downwards in the rising process, the floccules are continuously disintegrated and lifted by the air flow again in the violent turbulence, internal circulating particle flow similar to that of a circulating fluidized bed boiler is formed, and the slip speed between gas and solid is greatly improved; meanwhile, the gas outlet end is conical, so that the returning of floccules is further enhanced, the bed density of particles in the tower is further improved, and the mass transfer and heat transfer among gas and solid are greatly enhanced by a gas-solid two-phase flow mechanism in the circulating fluidized bed, so that the desulfurization rate is improved, the sulfur content in the discharged gas is reduced, and the aim of environmental protection is fulfilled; the gas inlet pipe is arranged, and waste gas discharged by sintering can be premixed with an absorbent or an adsorbent in the gas inlet pipe section, so that preliminary desulfurization reaction is realized.
In some embodiments, the ceramic industry integrated flue gas synergistic treatment system further comprises a compressed air tank, and the compressed air tank is communicated with the slaked lime supply device and the recirculation device. Thus, the compressed air tank is arranged, so that the slaked lime of the slaked lime supply device can quickly enter the desulfurizing tower, and simultaneously, the particles in the recycling device can return to the desulfurizing tower again.
In some embodiments, the slaked lime supply device comprises a slaked lime bin and a slaked lime delivery fan, the slaked lime bin is communicated with the air inlet pipe through a delivery pipe, the slaked lime delivery fan is arranged corresponding to the delivery pipe, and the compressed air tank is arranged corresponding to the slaked lime bin. Therefore, the slaked lime bin can ensure the supply amount of slaked lime; the slaked lime conveying fan is arranged, so that slaked lime can be conveyed into the desulfurizing tower smoothly for reaction.
In some embodiments, the water spraying device comprises a water tank, a water pump and a spray head, the spray head is arranged at the upper part of the venturi tube, the water tank is connected with the spray head through a water pipe, and the water pump is arranged corresponding to the water pipe. From this, when the flue gas surpassed the temperature of settlement or be less than when predetermineeing humidity, can pump the water of water tank to the shower nozzle blowout through the water pump, guarantee the supply of steam, increase flue gas humidity in the desulfurizing tower, realize the cooling simultaneously to flue gas desulfurization's reaction environment is optimized in the adjustment, improves desulfurization efficiency.
In some embodiments, the recycling device comprises a chute, a middle bin, a circulating ash conveying fan and a chute fluidizing fan, wherein the chute is arranged at the bottom of the bag-type dust remover and is connected with the bottom end of the bag-type dust remover, the middle bin is communicated with the chute, the middle bin is communicated with an air inlet pipe through a pipeline, the circulating ash conveying fan is arranged between the middle bin and the air inlet pipe, and the chute fluidizing fan and the chute are correspondingly arranged. From this, through the chute, be convenient for through the collection of the solid particle that the sack cleaner entrapment got off to fall into the intermediate bin, return to the desulfurizing tower through the effect of corresponding fan again and react, improve the desulfurization rate.
In some embodiments, the ceramic industry comprehensive flue gas cooperative treatment system further comprises a collector, the bag-type dust collector comprises a plurality of bags, the plurality of bags are sequentially arranged, two bags close to the exhaust port of the desulfurization tower are arranged corresponding to the collector, and the rest bags are arranged corresponding to the chute. Therefore, the excessive desulfurization ash can be conveniently collected by the collector and then discharged.
In some embodiments, the bag-type dust collector further comprises a bag framework made of an acid-resistant material, the surface of the bag is coated with a denitration catalyst, and the denitration catalyst is vanadium pentoxide, so that NOx in the flue gas can be reduced into non-toxic and pollution-free nitrogen and water. When the method is in operation, a reducing agent NH3 (liquid ammonia, urea and ammonia water) is added into the flue gas, so that NOx in the flue gas can be reduced into non-toxic and pollution-free nitrogen and water, and the main chemical reaction equation is as follows:
4NO+O2+4NH3→4N2+6H2O，
NO+NO2+2NH3→2N2+3H2O，
2NO2+O2+4NH3→3N2+6H2O。
in some embodiments, the venturi tube comprises a straight tube section and an outlet expanded tube section which are communicated with each other, the straight tube section is located below the outlet expanded tube section, the straight tube section is connected with the air inlet pipe, the outlet expanded tube section is connected with the tower body, and the aperture of the air inlet pipe is larger than that of the straight tube section in the venturi tube. Therefore, the rapid flow of the smoke is facilitated.
In some embodiments, the main chemical reaction equation for reacting the slaked lime with the flue gas components in the circulating fluidized bed of the desulfurization tower is as follows:
Ca(OH)2+SO2→CaSO3·1/2H2O+1/2H2O，
Ca(OH)2+SO3→CaSO4·1/2H2O+1/2H2O，
CaSO3·1/2H2O+1/2O2→CaSO4·1/2H2O，
Ca(OH)2+CO2→CaCO3+H2O，
Ca(OH)2+2HCl→CaCl2·2H2O，
2Ca(OH)2+2HCl→CaCl2·Ca(OH)2·2H2O，
Ca(OH)2+2HF→CaF2+2H2O。
therefore, the reaction of the slaked lime and each component in the flue gas can effectively remove the sulfur in the flue gas, and the purpose of sulfur removal is achieved.
Drawings
FIG. 1 is a schematic structural diagram of the comprehensive flue gas cooperative treatment system in the ceramic industry.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Refer to fig. 1. Flue gas cooperative treatment system is synthesized to pottery trade, including desulfurizing tower 1, sack cleaner 2, lime hydrate feeding device 3, water jet equipment 4, recirculation system 5 and draught fan 6, the bottom of desulfurizing tower 1 is equipped with the air inlet, the top is equipped with the gas vent, lime hydrate feeding device 3 and water jet equipment 4 all are linked together with the bottom of desulfurizing tower 1, water jet equipment 4 is higher than lime hydrate feeding device 3 and the intercommunication department of desulfurizing tower 1 with the intercommunication department of desulfurizing tower 1, sack cleaner 2 is linked together with the gas vent of desulfurizing tower 1, draught fan 6 communicates with sack cleaner 2, recirculation system 5's one end is connected with the bottom of sack cleaner 2, the other end is connected with the bottom of desulfurizing tower 1. Wherein, draught fan 6 communicates with external chimney for the exhaust flue gas of desulfurizing tower 1, behind the desulfurization of desulfurizing tower 1, and the dust removal effect of sack cleaner 2, through the effect of draught fan, is inhaled to chimney department and discharges, makes exhaust flue gas accomplish the processing of desulfurization and dust removal, and no waste water produces, does not have obvious white feather phenomenon moreover, realizes ultralow emission, has reached the purpose of environmental protection.
When the comprehensive flue gas cooperative treatment system in the ceramic industry is used, the comprehensive flue gas cooperative treatment system can be connected with flue gas discharge ports of various sintering devices, and flue gas enters through an air inlet at the bottom of the desulfurizing tower 1. After the flue gas enters the desulfurizing tower 1, the slaked lime supply device 3 conveys slaked lime to the desulfurizing tower 1; the water spraying device 4 sprays water to cool the flue gas and increase the humidity of flue gas particles; the flue gas after desulfurization is exhausted to a bag-type dust collector 2 through an exhaust port at the top end of a desulfurizing tower 1 to realize dust collection; the solid particles collected by the bag-type dust collector return to the desulfurizing tower 1 through the recycling device for reaction, so that the desulfurizing rate is improved.
Desulfurizing tower 1 includes tower body 11, venturi 12 and intake pipe 13, venturi 12 locates the bottom of tower body 11, and is linked together with tower body 11, be equipped with circulating fluidized bed in the tower body 11, intake pipe 13 and venturi 12's bottom intercommunication, the air inlet is located intake pipe 13 bottom, the top of tower body 11 is equipped with the end 14 of giving vent to anger, the end 14 of giving vent to anger is the toper, the upper end aperture of the end 14 of giving vent to anger is less than the lower extreme aperture.
The flue gas discharged from the sintering machine enters the air inlet pipe 13 of the desulfurizing tower 1 from the bottom through the inlet flue of the desulfurizing island, the high-temperature flue gas is fully premixed with the added absorbent, adsorbent or circulating desulfurization ash to carry out primary desulfurization reaction, and the reaction of the absorbent with HCl and HF is mainly completed in the area. If the adsorbent is added, heavy metals and organic pollutants (mainly dioxin (PCDD) and furan (PCDF)) in the smoke can be removed. The flue gas discharged by the sintering machine enters from the air inlet at the bottom of the Venturi tube 12, the flue gas enters into the circulating fluidized bed of the tower body 11 through the acceleration of the Venturi tube 12, the gas-solid phases in the circulating fluidized bed are violently turbulent and mixed due to the action of air flow and are fully contacted, floccules are continuously formed and return downwards in the rising process, the floccules are continuously disintegrated again in the violent turbulence and are lifted by the air flow again, internal circulating particle flow similar to the characteristic of a circulating fluidized bed boiler is formed, and the slipping speed between the gas and the solid is as high as tens of the slipping speed of single particles.
Meanwhile, the air outlet end 14 is conical, and the aperture of the upper end of the air outlet end 14 is smaller than that of the lower end, so that the returning of floccules is further strengthened, the bed density of particles in the tower is further improved, and the Ca/S ratio in the circulating fluidized bed is up to more than 50. Thus, the gas-solid two-phase flow mechanism in the circulating fluidized bed greatly strengthens the mass transfer and heat transfer between gas and solid, and is beneficial to realizing high desulfurization rate. Meanwhile, the adsorbent further adsorbs heavy metals, organic pollutants (mainly dioxin (PCDD) and furan (PCDF)) and the like in the flue gas.
The venturi tube 12 comprises a straight tube section 121 and an outlet expanded tube section 122 which are communicated with each other, the straight tube section 121 is positioned below the outlet expanded tube section 122, the straight tube section 121 is connected with the air inlet pipe 13, the outlet expanded tube section 122 is connected with the tower body 11, and the aperture of the air inlet pipe 13 is larger than that of the straight tube section 121 in the venturi tube 12. Thereby facilitating rapid flow of flue gas.
The comprehensive flue gas cooperative treatment system in the ceramic industry further comprises a compressed air tank 7, and the compressed air tank 7 is communicated with the slaked lime supply device 3 and the recirculation device 5. The compressed air tank 7 is arranged, so that the slaked lime in the slaked lime supply device 3 and the particles collected by the recirculation device 5 can be smoothly conveyed into the desulfurization tower 1.
The slaked lime feeding device 3 comprises a slaked lime bin 31 and a slaked lime conveying fan 32, the slaked lime bin 31 is communicated with the air inlet pipe 13 through a conveying pipeline, the slaked lime conveying fan 32 is arranged corresponding to the conveying pipeline, and the compressed air tank 7 is arranged corresponding to the slaked lime bin 31. The slaked lime in the slaked lime bin 31 can be normally conveyed into the desulfurizing tower 1 under the action of the slaked lime conveying fan 32, so that the reaction with the flue gas is realized. When the slaked lime conveying fan conveys slaked lime, CFD (Computational fluid dynamics) numerical simulation is adopted, the standard deviation of calcium concentration distribution is less than 5%, and the improvement of flow field uniformity and reactant concentration mixing uniformity is facilitated, so that the reaction rate is accelerated.
The water spraying device 4 comprises a water tank 41, a water pump 42 and a spray head 43, the spray head 43 is arranged at the upper part of the Venturi tube 12, the water tank 41 is connected with the spray head 43 through a water pipe, and the water pump 42 is arranged corresponding to the water pipe. The spray head 43 is arranged at the outlet expansion pipe section 122 of the Venturi pipe 12, so that the water tank 41 is pumped to the spray head 43 through the water pump 42, when the temperature of flue gas exceeds a set temperature or is lower than a preset humidity, water is sprayed out, the sprayed atomized water is used for reducing the temperature of the flue gas in the desulfurization reactor and increasing the humidity of the flue gas, the temperature of the flue gas is reduced to be about 20 ℃ higher than the dew point of the flue gas, the cooling and humidifying are realized, the reaction environment for flue gas desulfurization is adjusted and optimized, and the desulfurization efficiency is improved. SO that the reaction of SO2 with ca (oh)2 is converted into an ionic reaction that can be instantaneously completed. The absorbent and the circulating desulfurized ash are fully reacted in the second step in the tower above the Venturi section to generate by-products CaSO3 & 1/2H2O, and in addition, the by-products CaSO4 & 1/2H2O, CaF2, CaCl2 & Ca (OH)2 & 2H2O and the like which are generated by the reaction with SO3, HF and HCl.
In the actual use process, a high-pressure atomizing spray gun is adopted to spray atomized water, so that the particle size of the atomized water is less than 80um, and CFD numerical simulation is adopted to achieve that the standard deviation of H2O distribution is less than 5% and the temperature deviation of the cross section is less than 5 ℃, so that the flow field uniformity and the reactant concentration mixing uniformity are improved, and the reaction rate is accelerated.
Meanwhile, the water sprayed by the spray head 43 for reducing the temperature of the flue gas takes the particles which are violently turbulent and have larger surface area as carriers, and is fully evaporated in the tower, thereby ensuring the good reaction environment in the desulfurizing tower.
In the process that the flue gas rises in the desulfurizing tower 1, one part of particles are taken out of the desulfurizing tower 1 along with the flue gas, and one part of particles flow back to the circulating fluidized bed in the tower again due to self weight, so that the bed layer particle concentration of the fluidized bed is further increased, and the reaction time of the absorbent is prolonged.
From the viewpoint of chemical reaction engineering, the reaction process of the SO2 and the calcium hydroxide particles in the circulating fluidized bed is an external diffusion controlled reaction process; the reaction speed of the SO2 and the calcium hydroxide is mainly determined by the diffusion resistance of the SO2 on the surface of calcium hydroxide particles, or the gas film thickness on the surface of the calcium hydroxide. When the slip speed or the Reynolds number of the particles is increased, the thickness of the gas film on the surface of the calcium hydroxide particles is reduced, the mass transfer resistance of SO2 entering the calcium hydroxide is reduced, the mass transfer rate is increased, and the reaction of SO2 and the calcium hydroxide particles is accelerated. The maximum gas-solid slip speed is achieved only under the gas-solid two-phase flow mechanism of the circulating fluidized bed. Meanwhile, the maximum gas-solid slip speed in the desulfurizing tower is kept unchanged under different flue gas loads, and whether the maximum gas-solid slip speed in the desulfurizing reaction tower can be kept unchanged under different flue gas loads is an important index for judging whether a circulating fluidized bed dry-method desulfurizing process is advanced or not and also an important index for judging whether dry-method desulfurizing can reach higher desulfurizing rate or not.
Meanwhile, due to good heat transfer and mass transfer effects between gas and solid in the circulating fluidized bed, SO3 is completely removed, and the temperature of the discharged smoke is always controlled to be higher than the dew point temperature by more than 20 ℃, SO the discharged smoke does not need to be reheated, and the whole system does not need any anticorrosion treatment.
Recirculation device 5 includes chute 8, intermediate bin 9, circulation ash conveying fan 10 and chute fluidization fan 20, and the bottom of sack cleaner 2 is located to chute 8, and chute 8 is connected with the bottom of sack cleaner 2, and intermediate bin 9 is linked together with chute 8, and intermediate bin 9 is linked together through pipeline and intake pipe 13, and circulation ash conveying fan 10 is located between intermediate bin 9 and the intake pipe 13, and chute fluidization fan 20 corresponds the setting with chute 8.
From this, behind the sack cleaner 2 removed dust to the flue gas, the solid particle that gets off through sack cleaner 2 entrapment falls into on chute 8, through the effect of chute fluidization fan 20, with granule fluidization and landing to collecting in intermediate bin 9. The fluidized ash in the intermediate bin 9 is conveyed to an air inlet pipe 13 through a circulating ash conveying fan 10 and then enters the tower, namely returns to the desulfurizing tower 1 to continue to take part in the reaction. Through the arrangement of the recirculation device, whether the maximum gas-solid sliding speed in the desulfurization reaction tower can be kept constant under different flue gas loads or not is ensured, and the control speed is more than 2.5m/s (namely the sliding speed).
The comprehensive flue gas cooperative treatment system in the ceramic industry further comprises a collector 30, the bag-type dust collector 2 comprises a plurality of bags 21, the bags 21 are sequentially arranged, two bags close to the exhaust port of the desulfurization tower are arranged corresponding to the collector 20, and the rest bags 21 are arranged corresponding to the chute 8. By arranging the collector 30, the excessive small amount of desulfurization ash in the bag-type dust remover obtained after multiple circulations after the reaction in the desulfurization tower after passing through the intermediate bin 9 is conveyed into the collector 30 and finally discharged outside through a tank car or a secondary conveying device.
The cloth bag dust remover 2 of the comprehensive flue gas cooperative treatment system in the ceramic industry further comprises a cloth bag framework, the cloth bag framework is made of acid-resistant materials, the cloth bag framework is arranged in the cloth bag 21, the surface of the cloth bag 21 is coated with a denitration catalyst, the denitration catalyst is vanadium pentoxide, and during operation, a reducing agent NH3 (liquid ammonia, urea and ammonia water) is added into flue gas, so that NOx in the flue gas can be reduced into non-toxic and pollution-free nitrogen and water, and the main chemical reaction equation is as follows:
4NO+O2+4NH3→4N2+6H2O，
NO+NO2+2NH3→2N2+3H2O，
2NO2+O2+4NH3→3N2+6H2O
the main chemical reaction equation for the reaction of slaked lime with the components of flue gas in the circulating fluidized bed of the desulfurization tower 1 is as follows:
Ca(OH)2+SO2→CaSO3·1/2H2O+1/2H2O，
Ca(OH)2+SO3→CaSO4·1/2H2O+1/2H2O，
CaSO3·1/2H2O+1/2O2→CaSO4·1/2H2O，
Ca(OH)2+CO2→CaCO3+H2O，
Ca(OH)2+2HCl→CaCl2·2H2O，
2Ca(OH)2+2HCl＝CaCl2·Ca(OH)2·2H2O，
Ca(OH)2+2HF＝CaF2+2H2and O. Therefore, the sulfur in the flue gas can be effectively combined, the sulfur content in the finally discharged flue gas is greatly reduced, and the ultralow emission of pollutants is realized.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims (10)

1. The comprehensive flue gas cooperative treatment system in the ceramic industry is characterized by comprising a desulfurizing tower (1), a bag-type dust remover (2), a slaked lime supply device (3), a water spraying device (4), a recycling device (5) and a draught fan (6), the bottom end of the desulfurizing tower (1) is provided with an air inlet, the top end is provided with an air outlet, the slaked lime supply device (3) and the water spray device (4) are both communicated with the bottom of the desulfurizing tower (1), the communication position of the water spray device (4) and the desulfurizing tower (1) is higher than the communication position of the slaked lime supply device (3) and the desulfurizing tower (1), the bag-type dust collector (2) is communicated with an exhaust port of the desulfurizing tower (1), draught fan (6) and sack cleaner (2) intercommunication, the one end of recirculation device (5) is connected with the bottom of sack cleaner (2), and the other end is connected with the bottom of desulfurizing tower (1).
2. The ceramic industry comprehensive flue gas cooperative treatment system according to claim 1, wherein the desulfurizing tower (1) comprises a tower body (11), a venturi tube (12) and an air inlet pipe (13), the venturi tube (12) is arranged at the bottom of the tower body (11) and communicated with the tower body (11), a circulating fluidized bed is arranged in the tower body (11), the air inlet pipe (13) is communicated with the bottom of the venturi tube (12), the air inlet is positioned at the bottom end of the air inlet pipe (13), the top end of the tower body (11) is provided with an air outlet end (14), the air outlet end (14) is conical, and the aperture of the upper end of the air outlet end (14) is smaller than that of the lower end.
3. The ceramic industry comprehensive flue gas cooperative treatment system according to claim 2, further comprising a compressed air tank (7), wherein the compressed air tank (7) is communicated with the slaked lime supply device (3) and the recirculation device (5).
4. The ceramic industry comprehensive flue gas cooperative treatment system according to claim 3, wherein the slaked lime supply device (3) comprises a slaked lime bin (31) and a slaked lime conveying fan (32), the slaked lime bin (31) is communicated with the air inlet pipe (13) through a conveying pipeline, the slaked lime conveying fan (32) is arranged corresponding to the conveying pipeline, and the compressed air tank (7) is arranged corresponding to the slaked lime bin (31).
5. The ceramic industry comprehensive flue gas cooperative treatment system according to claim 4, wherein the water spraying device (4) comprises a water tank (41), a water pump (42) and a spray head (43), the spray head (43) is arranged at the upper part of the Venturi tube (12), the water tank (41) is connected with the spray head (43) through a water pipe, and the water pump (42) is arranged corresponding to the water pipe.
6. The ceramic industry comprehensive flue gas cooperative treatment system according to claim 5, wherein the recirculation device (5) comprises a chute (8), a middle bin (9), a circulating ash conveying fan (10) and a chute fluidizing fan (20), the chute (8) is arranged at the bottom of the bag-type dust collector (2), the chute (8) is connected with the bottom end of the bag-type dust collector (2), the middle bin (9) is communicated with the chute (8), the middle bin (9) is communicated with the air inlet pipe (13) through a pipeline, the circulating ash conveying fan (10) is arranged between the middle bin (9) and the air inlet pipe (13), and the fluidizing fan (20) is arranged corresponding to the chute (8).
7. The ceramic industry comprehensive flue gas cooperative treatment system according to claim 6, further comprising a collector (30), wherein the bag-type dust collector (2) comprises a plurality of bags (21), the bags (21) are sequentially arranged, two bags close to the exhaust port of the desulfurization tower are arranged corresponding to the collector (20), and the rest bags (21) are arranged corresponding to the chute (8).
8. The ceramic industry comprehensive flue gas cooperative treatment system as claimed in claim 7, wherein the cloth bag dust remover (2) further comprises a cloth bag framework, the cloth bag framework is arranged in the cloth bag (21), the cloth bag framework is made of acid-resistant materials, the surface of the cloth bag (21) is coated with a denitration catalyst, and the denitration catalyst is vanadium pentoxide.
9. The ceramic industry comprehensive flue gas cooperative treatment system according to any one of claims 2 to 8, wherein the venturi tube (12) comprises a straight tube section (121) and an outlet expanded tube section (122) which are communicated with each other, the straight tube section (121) is located below the outlet expanded tube section (122), the straight tube section (121) is connected with an air inlet pipe (13), the outlet expanded tube section (122) is connected with the tower body (11), and the aperture of the air inlet pipe (13) is larger than that of the straight tube section (121) in the venturi tube (12).
10. The ceramic industry comprehensive flue gas cooperative treatment system according to any one of claims 2 to 8, wherein a main chemical reaction equation of the reaction between slaked lime and each component of the flue gas in the circulating fluidized bed of the desulfurization tower (1) is as follows:
Ca(OH)2+SO2→CaSO3·1/2H2O+1/2H2O，
Ca(OH)2+SO3→CaSO4·1/2H2O+1/2H2O，
CaSO3·1/2H2O+1/2O2→CaSO4·1/2H2O，
Ca(OH)2+CO2→CaCO3+H2O，
Ca(OH)2+2HCl→CaCl2·2H2O，
2Ca(OH)2+2HCl→CaCl2·Ca(OH)2·2H2O，
Ca(OH)2+2HF→CaF2+2H2O。
CN202010704337.6A 2020-07-21 2020-07-21 Ceramic industry comprehensive flue gas cooperative treatment system Pending CN111744362A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113144877A (en) * 2021-04-08 2021-07-23 江门市同力环保科技有限公司 Semi-dry desulfurization and dust removal method for waste gas of sludge sintered ceramic ceramsite
CN113304610A (en) * 2021-06-04 2021-08-27 西安建筑科技大学 Fluidized cooling and conveying system and process for desulfurized circulating ash
CN115138192A (en) * 2022-07-11 2022-10-04 成都卓越四方环境科技有限公司 Device and process for removing dust, sulfur and nitrogen in cooperation with flue gas of submerged arc furnace
CN115350572A (en) * 2022-07-27 2022-11-18 湖南华润电力鲤鱼江有限公司 System and method for treating sulfur-containing waste gas of comprehensive power plant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113144877A (en) * 2021-04-08 2021-07-23 江门市同力环保科技有限公司 Semi-dry desulfurization and dust removal method for waste gas of sludge sintered ceramic ceramsite
CN113304610A (en) * 2021-06-04 2021-08-27 西安建筑科技大学 Fluidized cooling and conveying system and process for desulfurized circulating ash
CN115138192A (en) * 2022-07-11 2022-10-04 成都卓越四方环境科技有限公司 Device and process for removing dust, sulfur and nitrogen in cooperation with flue gas of submerged arc furnace
CN115350572A (en) * 2022-07-27 2022-11-18 湖南华润电力鲤鱼江有限公司 System and method for treating sulfur-containing waste gas of comprehensive power plant

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