CN210752075U

CN210752075U - Electrolytic aluminum flue gas desulfurization system

Info

Publication number: CN210752075U
Application number: CN201921309792.5U
Authority: CN
Inventors: 陈洪剑; 周伟; 吴伟良; 蔡起松
Original assignee: Zhejiang Tuna Environmental Science and Technology Co Ltd
Current assignee: Zhejiang Tuna Environmental Science and Technology Co Ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-06-16
Anticipated expiration: 2029-08-13

Abstract

The utility model discloses an electrolytic aluminum flue gas desulfurization system, which comprises a primary dust removal device, a secondary dust removal device with an ash outlet and an air outlet, a reactor and a mixer, wherein the mixer comprises a powder mixing mechanism and a powder humidifying mechanism; the powder mixing mechanism comprises a mixing cylinder, an absorbent feeding port arranged on the mixing cylinder, an ash inlet communicated with the ash outlet, and a stirring assembly arranged in the mixing cylinder; the powder humidifying mechanism comprises a humidifying cylinder, a spraying component facing the interior of the humidifying cylinder and an air supply component communicated with the humidifying cylinder; the mixing drum and the humidifying drum are connected, a powder transfer assembly is arranged at the position, and one end, far away from the mixing drum, of the humidifying drum is communicated with the reactor. The arrangement of the powder mixing mechanism and the powder humidifying mechanism enables the absorbent to be uniformly mixed with the circulating ash, and then under the action of a fan of the powder humidifying mechanism, the powder is blown to increase the contact surface with the flue gas SO as to improve the reaction degree of SO2 and the powder and reduce the emission of SO 2.

Description

Electrolytic aluminum flue gas desulfurization system

Technical Field

The utility model relates to a technical field that exhaust-gas treatment equipped, more specifically say, it relates to an electrolytic aluminum flue gas desulfurization system.

Background

The aluminum industry is an important basic industry for national economic development, the aluminum smelting industry of China is rapidly developed in recent decades, and China becomes a world with large aluminum production and aluminum consumption. Since 2001 replaced the largest electrolytic aluminum producing country in the United states, the Chinese aluminum industry developed from "express way" to "drag lane", and in 2013, the Chinese electrolytic aluminum and aluminum oxide yields accounted for 44% and 42% of the global total yield. The aluminum smelting industry is a high-pollution and high-energy-consumption industry, and the electrolytic aluminum industry brings serious environmental pollution problems while making great contribution to national economic construction. During the process of electrolyzing aluminum, a large amount of fluoride, sulfur dioxide and particulate matters are generated.

The electrolytic flue gas of the existing enterprises is generally treated by adopting a dry purification measure, the electrolytic tank for purifying the fluorine-containing flue gas is sealed by a small movable cover plate and an upper cover plate by utilizing the characteristic that aluminum oxide which is used as a raw material for aluminum electrolysis has stronger adsorption capacity to hydrogen fluoride gas, and the flue gas in the electrolytic tank is connected with a system through a gas collecting hood and a connecting branch pipe at the upper part. The flue gas emitted by the electrolytic cell is converged to a main flue gas exhaust pipe outside the electrolytic plant from a branch flue gas exhaust pipe at the top of the electrolytic cell under the action of a closed exhaust hood and the suction force of a fan, and then is converged into a flue of a purification system. Fresh alumina and circulating alumina are quantitatively added into a VRI reactor arranged on a flue in front of each group of dust collectors, and the alumina absorbs hydrogen fluoride in flue gas in the reactor and reacts to complete chemical adsorption of the alumina on the hydrogen fluoride. The reacted fluorine-carrying alumina enters the bag-type dust collector along with the flue gas, one part of the fluorine-carrying alumina collected by the dust collector is added into the reactor as circulating alumina to continue to take part in the reaction, and the other part of the fluorine-carrying alumina is conveyed to a fluorine-carrying alumina bin by a pneumatic chute and a pneumatic elevator to be used by an electrolytic bath, so that the fluoride in the flue gas is recovered while the flue gas is purified, and the consumption of fluoride salt is reduced. The purified flue gas is exhausted from a chimney, outdoor fresh air enters a workshop from the bottom layer through the peripheral ventilation grid plate of the cell, and the electrolytic flue gas escaping from the closed cover of the electrolytic cell forms ascending air flow by utilizing hot pressing and is exhausted from a skylight of the workshop.

Petroleum coke is the main raw material for preparing the prebaked anode for aluminum, generally accounts for about 65 percent of the weight of the anode, and the sulfur content of the petroleum coke is increased gradually as the specific gravity of the high-sulfur crude oil inlet of China is increased in recent years. With the rapid development of the electrolytic aluminum industry in China, the demand of petroleum coke for producing the anode is met, the increasing use amount of high-sulfur coke in the production of the prebaked anode becomes a necessary trend, and the sulfur content of the prebaked anode is generally high. The increase in sulphur content in the prebaked anode necessarily results in an increase in SO2 concentration in the cell exhaust, typically an increase of 1% in sulphur content in the prebaked anode, and an increase of 100mg/m3 in SO2 concentration in the cell exhaust. Therefore, when the sulfur content of the anode exceeds 2%, SO2 in the exhaust gas of the electrolytic cell is possibly out of standard, the dry adsorption purification technology of the aluminum electrolysis flue gas cannot effectively absorb SO2, and most aluminum electrolysis enterprises have the risk of out of standard SO2 concentration.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electrolytic aluminum flue gas desulfurization system, through the setting of powder mixing mechanism and powder humidification mechanism, can improve the reaction degree of SO2 and powder to the powder humidification to reduce the emission of SO 2.

In order to achieve the above purpose, the utility model provides a following technical scheme:

an electrolytic aluminum flue gas desulfurization system comprises a primary dust removal device and a secondary dust removal device which are sequentially connected with a flue gas output port, wherein the secondary dust removal device is provided with an ash outlet and an exhaust port, a reactor and a mixer are connected between the primary dust removal device and the secondary dust removal device, and an inlet of the reactor is connected with an outlet of the primary dust removal device through an induced draft fan; the mixer comprises a powder mixing mechanism and a powder humidifying mechanism;

the powder mixing mechanism comprises a mixing cylinder, an absorbent feeding port arranged on the mixing cylinder, an ash inlet communicated with an ash outlet of the secondary dust removal device, and a stirring assembly arranged in the mixing cylinder;

the powder humidifying mechanism comprises a humidifying cylinder connected with the mixing cylinder, a spraying assembly arranged towards the interior of the humidifying cylinder, and an air supply assembly communicated with the humidifying cylinder;

the mixing drum and the humidifying drum are connected and provided with a powder transfer assembly, and one end, far away from the mixing drum, of the humidifying drum is communicated with the reactor.

By adopting the technical scheme, the electrolytic flue gas is blown into the reactor after being dedusted by the primary dedusting device; the absorbent is put into the mixing drum from an absorbent putting port of the mixing drum, meanwhile, redundant circulating ash in the secondary dust removal device is put into the mixing drum from an ash inlet of the mixing drum, the absorbent and the circulating ash are uniformly stirred and mixed through the stirring assembly, then the uniformly stirred powder is conveyed into the humidifying drum through the powder transfer assembly, the powder is stirred and conveyed through the air supply assembly, and the powder is humidified through the spraying assembly, SO that a layer of water film can be attached to the surface of the powder, the humidity of the powder is improved, and the reaction degree with SO2 is further improved; meanwhile, under the action of the air supply assembly, the powder can be blown into the reactor, SO that the powder can be fully contacted with the electrolytic flue gas, the reaction degree of SO2 and the powder is improved, and the emission of SO2 is reduced.

Moreover, the flue gas is relatively hot after being output from the electrolytic bath, the moisture is also evaporated and radiated after the flue gas reacts with the powder attached with water, and the temperature of the flue gas after the powder reaction can be reduced.

Furthermore, the stirring assembly comprises a spiral stirring blade arranged in the mixing cylinder and a stirring motor coaxially connected with the spiral stirring blade.

By adopting the technical scheme, the stirring motor drives the spiral stirring blade to rotate, and the spiral stirring blade can stir the absorbent and the circulating ash to uniformly mix the absorbent and the circulating ash; and meanwhile, the mixed materials can be conveyed forwards.

Furthermore, the powder rotating assembly comprises a rotating roller and grid plates which are uniformly arranged on the surface of the rotating roller along the circumferential direction of the rotating roller, the grid plates are rotatably connected with the rotating roller around the length direction of the rotating roller, the length direction of the rotating roller is vertical to the rotating axial direction of the spiral stirring blade, and the rotating roller is coaxially connected with a rotating motor.

By adopting the technical scheme, the rotating motor drives the rotating roller to rotate, so that the grid plate can be driven to rotate; the powder can be held between two check boards, and under the drive of rotating the motor, the material that will be arranged in the mixing drum is transported to the humidifier to it is unrestrained in the humidifier, carries the powder under the effect of air supply subassembly.

Further, it has a plurality of rotation grooves evenly to begin along its circumference on the commentaries on classics roller, and the rotation inslot rotation is connected with the dwang, check and dwang body coupling just extend and rotate the extravagant portion of groove.

By adopting the technical scheme, the grid plate is connected with the rotating groove through the rotating rod, and when powder in the mixing drum is conveyed, the lower end surface of the grid plate is abutted against the notch of the rotating groove under the action of the weight of the grid plate and the powder, so that the powder is conveyed into the humidifying drum; then the powder slides down under self gravity, and the check board rotates round the dwang simultaneously for the angle grow of check board does benefit to the powder and breaks away from on the check board.

Furthermore, the air supply assembly comprises an air supply pipe spirally arranged on the inner wall of the humidifying cylinder and a fan connected with the air supply pipe, and a plurality of air outlets are uniformly formed in the air supply pipe towards the direction inside the humidifying cylinder.

Through adopting above-mentioned technical scheme, the blast pipe of spiral setting makes the gas that goes out from the gas outlet can take the powder spiral to carry forward, and when the spraying subassembly sprayed water mist to humidifier inside simultaneously, the gas of spiral transmission can also stir water mist and powder for can fully adhere to water mist on the powder.

Furthermore, a rotating blade rotatably connected with the humidifying cylinder is arranged at the joint of the humidifying cylinder and the reactor, and the rotating shaft of the rotating blade is parallel to the flowing direction of gas in the reactor.

Through adopting above-mentioned technical scheme, the air current of taking the powder of output in the humidifier has an impact force to the rotating blade for the rotating blade rotates around the axis of rotation, thereby makes and has the revolving force through the inside gas of rotating blade entering reactor, increases the area of contact with the inside flue gas of reactor, thereby makes the SO2 in the flue gas more thorough that can be reacted, reduces the emission of SO 2.

Furthermore, a guide plate is arranged at the outlet of the humidifier barrel and is positioned below the rotating blades.

By adopting the technical scheme, the temperature of the flue gas is higher, the rotary blades have direct impact force, and the arrangement of the guide plate can prevent the flue gas from directly impacting the rotary blades, so that the rotary blades can smoothly rotate; the temperature of the flue gas can evaporate the moisture remained on the rotating blades, so that the rotating blades can be dried when rotating back into the humidifier.

Furthermore, be provided with the spiral in the reactor and arrange the material pipe, set up a plurality of bin outlets on the spiral arranges the material pipe, humidifier export and spiral row material pipe intercommunication.

Through adopting above-mentioned technical scheme, discharge from the bin outlet after the delivery of spiral discharge tube is passed through to the powder of discharging from the humidifier, increased the area of contact with the flue gas, improved the reaction degree of flue gas and powder.

Furthermore, a temperature sensor is arranged at a position of the reactor close to the secondary dust removal device and used for detecting the gas temperature in the reactor, the temperature sensor is in signal connection with the powder humidifying mechanism, meanwhile, the temperature sensor is in signal connection with an alarm device, and when the detected temperature is higher than the set temperature, the alarm device gives an alarm.

Through adopting above-mentioned technical scheme, temperature sensor can the inside temperature of real time monitoring reactor, because the flue gas is reacted with the powder, the water film in the powder can be evaporated and make the inside temperature of reactor reduce, through temperature sensor control real-time temperature, can judge whether the inside flue gas of reactor reacts fully. And the temperature sensor is in signal connection with the powder humidifying mechanism, so that the internal temperature of the reactor can be automatically adjusted within a certain range.

Further, the ash inlet of the mixing drum is provided with a filter plate, the filter plate is arranged obliquely downwards, and a cleaning port is formed below the filter plate.

Through adopting above-mentioned technical scheme, filter the circulation ash that gets into in advancing the ash mouth, improve the purity that the circulation is lacked, simultaneously, when agitator motor when the operation, the filter can be along with slight vibrations, will circulate the ash and filter down from the filter, and the too big meeting of particle is piled up at the filter lower extreme, then clears up in following the clearance mouth.

Compared with the prior art, the utility model has the advantages that:

1. the combined arrangement of the powder mixing mechanism and the powder humidifying mechanism enables the absorbent and the circulating ash to be uniformly mixed firstly, and then under the action of a fan of the powder humidifying mechanism, the powder is blown to increase the contact area with the flue gas in the reactor SO as to improve the reaction degree of SO2 and the powder and reduce the emission of SO 2;

2. in the powder rotating assembly, the grid plates are rotatably connected with the rotating roller through the rotating rod, so that after powder is conveyed into the humidifying cylinder, the grid plates can rotate around the rotating rod under the action of self gravity, the rotating opening angle of the grid plates is increased, and the feeding speed of the powder between the grid plates is increased;

3. the arrangement of the rotating blades enables the powder fed into the reactor from the humidifying cylinder to have rotating force so as to increase the reaction degree with the flue gas;

4. the temperature sensor monitors the real-time temperature of the reactor, and can judge whether the flue gas in the reactor is fully reacted or not.

Drawings

FIG. 1 is an overall system diagram of the present invention;

FIG. 2 is a schematic structural diagram of a powder mixing mechanism according to an embodiment;

FIG. 3 is a schematic view of the structure of FIG. 2 from another angle;

fig. 4 is a schematic structural diagram of a powder mixing mechanism in the second embodiment.

Reference numerals: 100. a primary dust removal device; 200. a secondary dust removal device; 210. an ash outlet; 220. an exhaust port; 300. a reactor; 310. a spiral discharge pipe; 320. a discharge outlet; 400. a mixer; 410. a powder mixing mechanism; 411. a mixing drum; 412. an absorbent input port; 413. an ash inlet; 4131. a filter plate; 4132. cleaning the opening; 414. a stirring assembly; 4141. a spiral stirring blade; 4142. a stirring motor; 420. a powder humidifying mechanism; 421. a humidifier cartridge; 422. a spray assembly; 430. a powder transfer assembly; 431. rotating the roller; 432. a grid plate; 433. a rotating groove; 434. rotating the rod; 440. an air supply pipe; 441. an air outlet; 450. rotating the blades; 460. a baffle; 500. an induced draft fan; 600. a raw fly ash silo; 700. a desulfurization ash storage; 800. an absorbent storage reservoir.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Example one

An electrolytic aluminum flue gas desulfurization system, referring to fig. 1, comprises a primary dust removal device 100 connected with a flue gas outlet, a reactor 300 connected with the primary dust removal device 100 through an induced draft fan 500, and a secondary dust removal device 200 connected with the reactor 300, wherein the secondary dust removal device 200 is provided with an ash outlet 210 and an air outlet 220, and the air outlet 220 is connected with a chimney through a booster fan. In addition, the desulfurization system is further provided with a mixer 400, and the mixer 400 is connected with the ash outlet 210 of the secondary dust removal device 200, an external water source and an absorbent storage reservoir 800. After entering the primary dust removal device 100, the electrolytic flue gas is subjected to primary dust removal, and then the flue gas is sent into the reactor 300 under the action of the induced draft fan 500; the mixer 400 mixes the circulating ash discharged from the secondary dust collector 200 with the absorbent and water, then inputs the mixture into the reactor 300 to be fully mixed with the flue gas, the reacted gas is sent into the secondary dust collector 200 to be dedusted again, the dedusted gas is discharged by the booster fan, and meanwhile the circulating ash is sent into the mixer 400.

It should be noted that the primary dust removing device 100 employs an electric dust remover, and the secondary dust removing device 200 may employ a bag-type dust remover. The raw fly ash generated after the dust removal by the electric dust remover is sent to the raw fly ash storage 600 for storage and transportation, and the desulfurized ash generated after the dust removal by the bag-type dust remover is sent to the desulfurized ash storage 700 for storage and transportation. The reactor 300 is also provided with an outlet communicating with the desulfurized ash storage 700, so that ash can be discharged when the amount of ash deposited in the reactor 300 is excessive.

Referring to fig. 2, the mixer 400 includes a powder mixing mechanism 410 and a powder humidifying mechanism 420. The powder mixing mechanism 410 includes a mixing barrel 411, an absorbent inlet 412 provided on the mixing barrel 411, an ash inlet 413 communicating with the ash outlet 210 of the secondary dust removing device 200, and a stirring assembly 414 provided inside the mixing barrel 411. Wherein, stirring subassembly 414 includes setting up the spiral stirring leaf 4141 that sets up in mixing drum 411 coaxially, with the agitator motor 4142 of spiral stirring leaf 4141 coaxial coupling, agitator motor 4142 rotates and drives spiral stirring leaf 4141 and rotate, when stirring the powder, can be with boring forward conveying. In addition, a filter plate 4131 is provided at the ash inlet 413 of the mixing drum 411, the filter plate 4131 is disposed obliquely downward, a cleaning port 4132 is provided below the filter plate 4131, the circulating ash discharged from the secondary dust removing device 200 is vibration-screened by vibration generated when the agitator motor 4142 operates, and the circulating ash is discharged out of compliance through the cleaning port 4132.

The powder humidifying mechanism 420 comprises a humidifying cylinder 421 connected with the mixing cylinder 411, a spraying component 422 arranged towards the interior of the humidifying cylinder 421, and an air supply component communicated with the humidifying cylinder 421; the air supply assembly comprises an air supply pipe 440 spirally arranged on the inner wall of the humidifier cartridge 421 and a fan connected with the air supply pipe 440, and a plurality of air outlets 441 are uniformly arranged on the air supply pipe 440 towards the inner direction of the humidifier cartridge 421. Humidifier 421 and mixing drum 411 integrative setting, spraying assembly 422 is including setting up the atomizing nozzle in humidifier 421 inside, and atomizing nozzle is connected with external water source.

In addition, a powder material transferring assembly 430 is arranged at the connecting position of the mixing cylinder 411 and the humidifying cylinder 421, and one end of the humidifying cylinder 421, which is far away from the mixing cylinder 411, is communicated with the reactor 300. The powder rotating assembly comprises a rotating roller 431 and a grid plate 432 uniformly arranged on the surface of the rotating roller 431 along the circumferential direction of the rotating roller 431, the grid plate 432 is rotatably connected with the rotating roller 431 around the length direction of the rotating roller 431, the length direction of the rotating roller 431 is perpendicular to the rotating axial direction of a spiral stirring blade 4141, and a rotating motor is coaxially connected with the rotating roller 431. Two ends of the grid plate 432 are tangent to the inner wall of the mixing cylinder 411, so that a space for containing powder can be formed by the two grid plates 432 and the inner wall of the mixing cylinder 411.

And evenly begin to have a plurality of rotation grooves 433 along its circumference on changeing roller 431, rotate the inslot 433 internal rotation and be connected with dwang 434, grid 432 and dwang 434 integrated connection just extend and rotate the groove 433 outward. When the powder in the mixing cylinder 411 is fed, the lower end surface of the grid 432 abuts against the notch of the rotary groove 433 due to the weight of the grid 432 and the action of the powder, and the powder is fed into the humidifier 421; then the powder slides downward under its own weight, and at the same time the grid 432 rotates around the rotating rod 434, so that the angle of the grid 432 becomes larger, facilitating the powder to separate from the grid 432.

In addition, referring to fig. 2 and 3, a rotating blade 450 rotatably connected to the humidifier cartridge 421 is disposed at a connection position of the humidifier cartridge 421 and the reactor 300, a rotating shaft of the rotating blade 450 is parallel to a gas flow direction in the reactor 300, and the gas flow at an outlet of the humidifier cartridge 421 can drive the rotating blade 450 to rotate, so that the powder material can rotate and enter the reactor 300. And a guide plate 460 is arranged at the outlet of the humidifier 421, and the guide plate 460 is located below the rotating blade 450, so that the flue gas cannot be directly blown to the rotating blade 450, and the upward mixing of the rotating blade 450 is avoided. Meanwhile, the air flow temperature in the reactor 300 is high, so that the rotary blades 450 can be dried in real time.

In addition, a temperature sensor is installed at a position of the reactor 300 close to the secondary dust removing device 200 for detecting the gas temperature inside the reactor 300, and the temperature sensor is in signal connection with an alarm device, and when the detected temperature is higher than a set temperature, the alarm device gives an alarm. And the temperature sensor is in signal connection with the powder humidifying mechanism, specifically, the spraying component 422, when the temperature detected by the temperature sensor is higher than the set temperature, the spraying amount of the spraying component 422 is increased, so that the internal temperature of the reactor 300 can be automatically adjusted within a certain range.

The working principle is as follows:

after the electrolysis flue gas is dedusted by an electric precipitator, the electrolysis flue gas is introduced into the reactor 300 under the action of a draught fan 500; meanwhile, an absorbent such as calcium oxide or calcium hydroxide is fed into the mixing cylinder 411 from an absorbent feeding port 412 of the mixing cylinder 411, excess circulating ash in the bag-type dust collector is fed from an ash inlet 413 of the mixing cylinder 411, and the absorbent and the circulating ash are stirred and mixed uniformly through a spiral stirring blade 4141.

Then the grid plate 432 is used for transferring the powder material into the humidifying cylinder 421, the air outlet 441 on the air supply pipe 440 is used for stirring and conveying the powder material, and the spraying assembly 422 sprays the powder material at the moment, so that the surface of the powder material can be attached with a water film.

Then, the powder is sent to the reactor 300 through the rotating blade 450, and is mixed and reacted with the input flue gas to be desulfurized, the reacted gas enters a bag-type dust remover to be dedusted, the clean air is discharged to the air, and the circulating ash is led to the mixing cylinder 411.

Example two

Referring to fig. 4, the difference between the electrolytic aluminum flue gas desulfurization system and the first embodiment is that a spiral discharge pipe 310 is arranged in a reactor 300, a plurality of discharge ports 320 are formed in the spiral discharge pipe 310, and an outlet of a humidifier 421 is communicated with the spiral discharge pipe 310. The powder discharged from the humidifying cylinder 421 is conveyed by the spiral discharge pipe 310 and then discharged from the discharge port 320, so that the contact area with the flue gas is increased, and the reaction degree of the flue gas and the powder is improved.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An electrolytic aluminum flue gas desulfurization system comprises a primary dust removal device (100) and a secondary dust removal device (200) which are sequentially connected with a flue gas output port, wherein the secondary dust removal device (200) is provided with an ash outlet (210) and an exhaust port (220), and is characterized in that a reactor (300) and a mixer (400) are connected between the primary dust removal device (100) and the secondary dust removal device (200), and an inlet of the reactor (300) is connected with an outlet of the primary dust removal device (100) through an induced draft fan (500); the mixer (400) comprises a powder mixing mechanism (410) and a powder humidifying mechanism (420);

the powder mixing mechanism (410) comprises a mixing cylinder (411), an absorbent feeding port (412) arranged on the mixing cylinder (411), an ash inlet (413) communicated with an ash outlet (210) of the secondary dust removal device (200), and a stirring assembly (414) arranged in the mixing cylinder (411);

the powder humidifying mechanism (420) comprises a humidifying cylinder (421) connected with the mixing cylinder (411), a spraying assembly (422) arranged towards the interior of the humidifying cylinder (421), and an air supply assembly communicated with the humidifying cylinder (421);

and a powder transfer assembly (430) is arranged at the connecting position of the mixing cylinder (411) and the humidifying cylinder (421), and one end, far away from the mixing cylinder (411), of the humidifying cylinder (421) is communicated with the reactor (300).

2. The electrolytic aluminum flue gas desulfurization system of claim 1, wherein the stirring assembly (414) comprises a spiral stirring blade (4141) disposed inside the mixing drum (411), and a stirring motor (4142) coaxially connected with the spiral stirring blade (4141).

3. The electrolytic aluminum flue gas desulfurization system of claim 2, wherein the powder transfer assembly (430) comprises a rotating roller (431), and grid plates (432) uniformly arranged on the surface of the rotating roller (431) along the circumferential direction of the rotating roller (431), the grid plates (432) are rotatably connected with the rotating roller (431) around the length direction of the rotating roller (431), the length direction of the rotating roller (431) is perpendicular to the rotating axial direction of the spiral stirring blade (4141), and a rotating motor is coaxially connected with the rotating roller (431).

4. The electrolytic aluminum flue gas desulfurization system according to claim 3, wherein the rotating roller (431) has a plurality of rotating grooves (433) starting uniformly along its circumference, the rotating grooves (433) are rotatably connected with rotating rods (434), and the grid plates (432) are integrally connected with the rotating rods (434) and extend out of the rotating grooves (433).

5. The electrolytic aluminum flue gas desulfurization system of claim 1, wherein the air supply assembly comprises an air supply pipe (440) spirally arranged on the inner wall of the humidifier cartridge (421), and a fan connected with the air supply pipe (440), and a plurality of air outlets (441) are uniformly formed on the air supply pipe (440) in the direction towards the interior of the humidifier cartridge (421).

6. The electrolytic aluminum flue gas desulfurization system according to claim 5, wherein a rotating blade (450) rotatably connected with the humidifier (421) is arranged at the connection of the humidifier (421) and the reactor (300), and the rotating shaft of the rotating blade (450) is parallel to the gas flow direction in the reactor (300).

7. The electrolytic aluminum flue gas desulfurization system of claim 6, wherein a baffle (460) is provided at the outlet of the humidifier cartridge (421), and the baffle (460) is located below the rotating blades (450).

8. The electrolytic aluminum flue gas desulfurization system according to claim 5 or 6, wherein a spiral discharge pipe (310) is arranged in the reactor (300), a plurality of discharge ports (320) are formed in the spiral discharge pipe (310), and an outlet of the humidifying cylinder (421) is communicated with the spiral discharge pipe (310).

9. The electrolytic aluminum flue gas desulfurization system according to claim 1, wherein a temperature sensor is installed in the reactor (300) near the secondary dust removal device (200) for detecting the gas temperature inside the reactor (300), and the temperature sensor is in signal connection with the powder humidifying mechanism, and simultaneously the temperature sensor is in signal connection with the alarm device, and when the detected temperature is higher than the set temperature, the alarm device gives an alarm.

10. The electrolytic aluminum flue gas desulfurization system according to claim 1, wherein a filter plate (4131) is disposed at the ash inlet (413) of the mixing drum (411), the filter plate (4131) is disposed obliquely downward, and a cleaning port (4132) is opened below the filter plate (4131).