阅读说明：本技术 一种基于磁电耦合的悬浮云雾降尘净化装置及方法 (Suspended cloud and mist dust-settling purification device and method based on magnetoelectric coupling ) 是由 荆德吉 贾荞溪 任帅帅 安日娜 庞星宇 王志恒 贾鑫 马纪闯 于 2019-10-31 设计创作，主要内容包括：本发明涉及了一种基于磁电耦合的悬浮云雾降尘净化装置及方法,装置包括感应电荷喷雾装置、烟气感应电荷装置、除尘装置以及回收利用装置,所述感应电荷喷雾装置中水箱中的水经水泵泵入输水管道,经过磁化装置后变成磁化水,与高压空气结合流经组合电极形成带有正电荷和负电荷的磁化水雾喷入除尘装置；含尘气体经烟气感应电荷装置形成带有与磁化水雾带有相反电荷的含尘气流,进入除尘装置；带有相反电荷的磁化水雾和含尘气体在磁电耦合作用下相结合,磁化水喷雾吸附、捕获粉尘并排出污水,净化后的气体通过粉尘浓度传感器及粉尘粒度分析仪,排出符合标准的气体。本发明利用磁电耦合作用使带有相反电荷的水和灰尘充分交融并沉降,有效提高除尘效率。(The invention relates to a suspended cloud and mist dust-settling purification device and method based on magnetoelectric coupling, the device comprises an induced charge spraying device, a smoke induced charge device, a dust removal device and a recycling device, water in a water tank in the induced charge spraying device is pumped into a water pipeline through a water pump, the water is changed into magnetized water through a magnetizing device, and the magnetized water and high-pressure air are combined and flow through a combined electrode to form magnetized water mist with positive charges and negative charges to be sprayed into the dust removal device; the dust-containing gas forms dust-containing airflow with opposite charges to the magnetized water mist through the smoke induction charge device and enters the dust removal device; the magnetized water spray with opposite charges is combined with the dust-containing gas under the action of magnetoelectric coupling, the magnetized water spray adsorbs and captures dust and discharges sewage, and the purified gas passes through a dust concentration sensor and a dust particle size analyzer and discharges gas meeting the standard. The invention utilizes the magnetoelectric coupling effect to ensure that water and dust with opposite charges are fully blended and settled, thereby effectively improving the dust removal efficiency.)

1. The utility model provides a suspension cloud and mist dust fall purifier based on magnetoelectric coupling which characterized in that: the device comprises an induction charge spraying device, a smoke induction charge device, a dust removal device and a recycling device, wherein the induction charge spraying device comprises an air compressor, a gas transmission pipeline, a water tank, a water pump, a water transmission pipeline, a magnetization device and a combined electrode; the smoke sensing device comprises a power supply and an annular electrode; the dust removal device comprises a dust inlet, a dust removal tower, a dust outlet, a dust concentration sensor, a dust particle size analyzer, a fan II and a PLC (programmable logic controller), all the parts are connected through a smoke conveying pipeline, a baffle is welded on the inner wall of the smoke conveying pipeline close to the dust inlet, the dust inlet is connected with the lower part of the dust removal tower through the smoke conveying pipeline, the dust concentration sensor and the dust particle size analyzer are installed at the joint of the smoke conveying pipeline connected with the dust outlet at the upper part of the dust removal tower, the PLC is electrically connected with the dust concentration sensor, the dust particle size analyzer and the fan II, the annular electrode surrounds the outer side of the smoke conveying pipeline close to the dust inlet, the water tank is positioned at the bottom of the dust removal tower, and an ash hopper; the recycling device comprises an ash bucket in the dedusting tower, multiple filter screens, a water tank, a water pump, a water pipeline and a first fan, the first fan is electrically connected with the PLC, the multiple filter screens are arranged between the water tank and the dedusting tower, water enters the dedusting tower through the water pump and the water pipeline to participate in the purification process of dusty airflow, and sewage is filtered by the ash bucket through the multiple filter screens and returns to the water tank again, so that the water recycling is realized.

2. The suspended cloud and mist dust-settling and purifying device based on magnetoelectric coupling according to claim 1, characterized in that: the magnetizer is an electromagnetic magnetizer, so that the magnetizing time can be conveniently adjusted, and common liquid water in the water tank is pumped into the water delivery pipeline by the water pump and is converted into magnetized water after passing through the magnetizer.

3. The suspended cloud and mist dust-settling and purifying device based on magnetoelectric coupling according to claim 1, characterized in that: the combined electrode comprises a nozzle electrode and a ring-needle combined electrode, the combined electrode can obviously reduce the particle size and the speed of liquid drops, the stability of spraying is enhanced, and the number of the combined electrodes can be set according to actual conditions.

4. The suspended cloud and mist dust-settling and purifying device based on magnetoelectric coupling according to claim 1, characterized in that: a dust collecting groove is arranged in a smoke conveying pipeline connected with the dust inlet and the dust removing tower and close to the dust inlet, and dust with large particle size intercepted by the baffle plate can be collected.

5. The suspended cloud and mist dust-settling and purifying device based on magnetoelectric coupling is characterized in that: the baffle sets up in dust collecting vat top perpendicular to dust direction of advancing, and the quantity is 3 ~ 5 pieces, the baffle is 45 contained angles with defeated tobacco pipe lateral wall.

6. The suspended cloud and mist dust-settling and purifying device based on magnetoelectric coupling according to claim 1, characterized in that: the dust removal tower is connected with the dust outlet through a smoke conveying pipeline, a dust concentration sensor and a dust particle size analyzer are installed at the joint of the dust removal tower and the smoke conveying pipeline, and a fan II in the dust removal device is installed at a position close to the dust outlet and used for discharging gas meeting emission outside the device; a first fan in the recycling device is arranged in the smoke conveying pipeline branch to form a loop with the dust removal tower, and gas which does not accord with the emission standard is discharged into the dust removal tower again for dust removal.

7. The suspended cloud and mist dust-settling and purifying device based on magnetoelectric coupling according to claim 1, characterized in that: water in the water tank enters the induction charge spraying device through the water pump, and the one-way permeable membrane is arranged at the joint of the water tank and the water pipeline so as to ensure the purity of the water in the purification device and realize the recycling of the water.

8. The suspended cloud and mist dust-settling and purifying device based on magnetoelectric coupling according to claim 1, characterized in that: the dust outlet is provided with a dust-proof and waterproof ventilating film, the dust-proof and waterproof ventilating film is arranged in the direction close to the dust outlet, the gas is dried, and the bottom of the dust outlet is connected with a water pipe connected to a water tank to form a water circulation loop.

9. The suspended cloud and mist dust-settling and purifying device based on magnetoelectric coupling according to claim 1, characterized in that: the multiple filter screens are provided with pulse ash removal devices, compact latticed inclined steel frames are arranged below the multiple filter screens, water-permeable non-woven fabrics are laid on the compact latticed inclined steel frames, and the pulse ash removal devices can clean impurities in sewage intercepted on the multiple filter screens to the water-permeable non-woven fabrics; the compact latticed inclined steel frame has a self-vibration function, can vibrate impurities to the bottom end of the compact latticed inclined steel frame, and is convenient to clean the permeable non-woven fabric as the outer side of the upper part of the water tank close to the ground is in a sliding door mode.

10. The dust settling and purifying method of the suspended cloud and mist dust settling and purifying device based on magnetoelectric coupling of any one of claims 1 to 9 is characterized in that: the method specifically comprises the following steps:

the method comprises the following steps: the dust-containing waste gas enters the smoke conveying pipeline from the dust inlet, the baffle plate settles the dust with large particle size into the dust collecting tank, the waste gas without the dust with large particle size passes through the smoke conveying pipeline and a smoke induction charge device consisting of a power supply and an annular electrode, so that the dust in the waste gas is positively or negatively charged, and the dust-containing air flow with charges continuously enters the dust removal tower through the smoke conveying pipeline;

step two: starting a water pump to pump common liquid water in a water tank into a water delivery pipeline through a one-way permeable membrane and change the common liquid water into magnetized water through a magnetizing device, simultaneously starting an air compressor to pressurize air, enabling the magnetized water and high-pressure air to enter a combined electrode through a valve and a pressure gauge to form magnetized water spray with charges opposite to those of dusty air flow, and spraying the magnetized water spray onto the upper part of a dust removal tower;

step three: the dust-containing airflow with opposite charges and the magnetized water spray are fully combined in the dust removal tower, the magnetized water spray adsorbs and captures dust and discharges sewage through the ash bucket, and the sewage is filtered by the multiple filter screens and then enters the water tank again; the purified gas passes through a dust concentration sensor and a dust particle size analyzer, the dust concentration sensor and the dust particle size analyzer transmit detected dust concentration and particle size signals to a PLC, if the concentration and particle size of dust in the purified gas received by the PLC meet particulate matter emission standards in the air pollutant comprehensive emission standard, the PLC starts a second fan close to a dust outlet, and the second fan works to discharge the gas from the dust outlet; if any one of the concentration or the particle size of the dust in the purified gas received by the PLC does not accord with the particulate matter emission standard in the air pollutant comprehensive emission standard, the PLC controls a first fan positioned on the other smoke conveying pipeline to start to work, so that the smoke returns to the dust removal tower for dust removal again until the concentration and the particle size of the dust accord with the standard, and the dust can be discharged from the dust outlet, and the dust purification is finished.

Technical Field

The invention belongs to the technical field of dust control, and particularly relates to a suspended cloud and mist dust settling and purifying device and method based on magnetoelectric coupling.

Background

While the industry in China is developing at a high speed, the environment is facing to severe examination, dust pollution is one of important factors causing environmental deterioration, the dust pollution problem is more serious due to the large-scale industrial rise and production, the influence on human bodies, industrial production, product quality and economic benefit can be caused, and the environmental and ecological balance can be damaged.

At present, the most popular dust removal mode is wet water mist dust removal, although the mode is economic and simple, the dust removal efficiency is low and the dust removal effect is not ideal due to factors such as randomness, circulation, large surface tension of water drops and the like; there are also problems with corrosion of equipment and pipes, treatment of sewage and sludge, and recycling of by-products. On the basis of wet dust removal and electrostatic dust removal of the traditional dust removal principle, under the condition of coupling charged magnetized water mist and charged dust, the dust and the water mist can be fully fused and settled under the action of magnetoelectric adsorption force, so that the dust collector has a good adsorption effect on the dust with large particle size and an obvious capture effect on the dust with small particle size, the evaporation speed of the magnetized water is slower, the retention time in the air is longer, and a better dust removal and purification effect can be obtained.

Therefore, it is necessary to design a purification apparatus having excellent overall performance against the disadvantages of the single dustfall form such as wet mist dustfall.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a suspended cloud and mist dust-settling purification device and method based on magnetoelectric coupling.

The invention is realized by adopting the following technical scheme:

a suspended cloud and mist dust-settling and purifying device based on magnetoelectric coupling comprises an induced charge spraying device, a smoke induced charge device, a dust removal device and a recycling device, wherein the induced charge spraying device comprises an air compressor, a gas transmission pipeline, a water tank, a water pump, a water transmission pipeline, a magnetizing device and a combined electrode; the smoke sensing device comprises a power supply and an annular electrode; the dust removal device comprises a dust inlet, a dust removal tower, a dust outlet, a dust concentration sensor, a dust particle size analyzer, a fan II and a PLC (programmable logic controller), all the parts are connected through a smoke conveying pipeline, a baffle is welded on the inner wall of the smoke conveying pipeline close to the dust inlet, the dust inlet is connected with the lower part of the dust removal tower through the smoke conveying pipeline, the dust concentration sensor and the dust particle size analyzer are installed at the joint of the smoke conveying pipeline connected with the dust outlet at the upper part of the dust removal tower, the PLC is electrically connected with the dust concentration sensor, the dust particle size analyzer and the fan II, the annular electrode surrounds the outer side of the smoke conveying pipeline close to the dust inlet, the water tank is positioned at the bottom of the dust removal tower, and an ash hopper; the recycling device comprises an ash bucket in the dedusting tower, multiple filter screens, a water tank, a water pump, a water pipeline and a first fan, the first fan is electrically connected with the PLC, the multiple filter screens are arranged between the water tank and the dedusting tower, water enters the dedusting tower through the water pump and the water pipeline to participate in the purification process of dusty airflow, and sewage is filtered by the ash bucket through the multiple filter screens and returns to the water tank again, so that the water recycling is realized.

The magnetizer is an electromagnetic magnetizer, so that the magnetizing time can be conveniently adjusted, and common liquid water in the water tank is pumped into the water delivery pipeline by the water pump and is converted into magnetized water after passing through the magnetizer.

The combined electrode comprises a nozzle electrode and a ring-needle combined electrode, the combined electrode can obviously reduce the particle size and the speed of liquid drops, the stability of spraying is enhanced, and the number of the combined electrodes can be set according to actual conditions.

A dust collecting groove is arranged in a smoke conveying pipeline connected with the dust inlet and the dust removing tower and close to the dust inlet, and dust with large particle size intercepted by the baffle plate can be collected.

The baffle sets up in dust collecting vat top perpendicular to dust direction of advancing, and the quantity is 3 ~ 5 pieces, the baffle is 45 contained angles with defeated tobacco pipe lateral wall.

The dust removal tower is connected with the dust outlet through a smoke conveying pipeline, a dust concentration sensor and a dust particle size analyzer are installed at the joint of the dust removal tower and the smoke conveying pipeline, and a fan II in the dust removal device is installed at a position close to the dust outlet and used for discharging gas meeting emission outside the device; a first fan in the recycling device is arranged in the smoke conveying pipeline branch to form a loop with the dust removal tower, and gas which does not accord with the emission standard is discharged into the dust removal tower again for dust removal.

Water in the water tank enters the induction charge spraying device through the water pump, and the one-way permeable membrane is arranged at the joint of the water tank and the water pipeline so as to ensure the purity of the water in the purification device and realize the recycling of the water.

The dust outlet is provided with a dust-proof and waterproof ventilating film, the dust-proof and waterproof ventilating film is arranged in the direction close to the dust outlet, the gas is dried, and the bottom of the dust outlet is connected with a water pipe connected to a water tank to form a water circulation loop.

The multiple filter screens are provided with pulse ash removal devices, compact latticed inclined steel frames are arranged below the multiple filter screens, water-permeable non-woven fabrics are laid on the compact latticed inclined steel frames, and the pulse ash removal devices can clean impurities in sewage intercepted on the multiple filter screens to the water-permeable non-woven fabrics; the compact latticed inclined steel frame has a self-vibration function, can vibrate impurities to the bottom end of the compact latticed inclined steel frame, and is convenient to clean the permeable non-woven fabric as the outer side of the upper part of the water tank close to the ground is in a sliding door mode.

The dust settling and purifying method of the suspended cloud and mist dust settling and purifying device based on magnetoelectric coupling specifically comprises the following steps:

the method comprises the following steps: the dust-containing waste gas enters the smoke conveying pipeline from the dust inlet, the baffle plate settles the dust with large particle size into the dust collecting tank, the waste gas without the dust with large particle size passes through the smoke conveying pipeline and a smoke induction charge device consisting of a power supply and an annular electrode, so that the dust in the waste gas is positively or negatively charged, and the dust-containing air flow with charges continuously enters the dust removal tower through the smoke conveying pipeline;

step two: starting a water pump to pump common liquid water in a water tank into a water delivery pipeline through a one-way permeable membrane and change the common liquid water into magnetized water through a magnetizing device, simultaneously starting an air compressor to pressurize air, enabling the magnetized water and high-pressure air to enter a combined electrode through a valve and a pressure gauge to form magnetized water spray with charges opposite to those of dusty air flow, and spraying the magnetized water spray onto the upper part of a dust removal tower;

step three: the dust-containing airflow with opposite charges and the magnetized water spray are fully combined in the dust removal tower, the magnetized water spray adsorbs and captures dust and discharges sewage through the ash bucket, and the sewage is filtered by the multiple filter screens and then enters the water tank again; the purified gas passes through a dust concentration sensor and a dust particle size analyzer, the dust concentration sensor and the dust particle size analyzer transmit detected dust concentration and particle size signals to a PLC, if the concentration and particle size of dust in the purified gas received by the PLC meet particulate matter emission standards in the air pollutant comprehensive emission standard, the PLC starts a second fan close to a dust outlet, and the second fan works to discharge the gas from the dust outlet; if any one of the concentration or the particle size of the dust in the purified gas received by the PLC does not accord with the particulate matter emission standard in the air pollutant comprehensive emission standard, the PLC controls a first fan positioned on the other smoke conveying pipeline to start to work, so that the smoke returns to the dust removal tower for dust removal again until the concentration and the particle size of the dust accord with the standard, and the dust can be discharged from the dust outlet, and the dust purification is finished.

The invention has the beneficial effects that:

1. the device disclosed by the invention is based on the magnetoelectric coupling effect, and utilizes the magnetic and electric coupling principle to fully combine magnetized water mist with opposite charges with dust-containing airflow, so that the dust is better adsorbed and captured, the device is suitable for dust with various particle size ranges, the dust removal efficiency can be effectively improved, the device is protected, the service life of the machine is prolonged, and the harm of the dust to human bodies and the environment can be reduced;

2. the recycling device can recycle the waste water, so that the waste of water resources is avoided;

3. the dust concentration sensor and the dust particle size analyzer are arranged in the dust particle analyzer, so that the concentration and the particle size of dust in the purified gas can be accurately fed back, and the optimal dust removal effect is ensured.

Drawings

FIG. 1 is a schematic connection diagram of a suspended cloud and mist dust-settling purification device based on magnetoelectric coupling in the invention;

FIG. 2 is a front view of the combined electrode of the present invention;

FIG. 3 is a top view of a ring-pin hybrid motor in the combined electrode of the present invention;

FIG. 4 is a schematic view of a dust inlet according to the present invention;

wherein the content of the first and second substances,

1-dust inlet, 2-power supply, 3-ring electrode, 4-water pump, 5-water pipeline, 6-water tank, 7-dust hopper, 8-dust removing tower, 9-fan II, 10-dust outlet, 11-gas pipeline, 12-pressure gauge, 13-valve, 14-air compressor, 15-nozzle electrode, 16-dust collecting tank, 17-one-way permeable membrane, 18-multiple filter screen, 19-dust concentration sensor, 20-dust particle size analyzer, 21-dust-proof and waterproof permeable membrane, 22-ring-needle composite electrode, 23-compact grid inclined steel frame, 24-magnetizer, 25-gas pipeline, 26-PLC, 27-fan I, 28-baffle.

Detailed Description

For better understanding of the present invention, the technical solutions and effects of the present invention will be described in detail by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1, a suspended cloud and mist dust-settling and purifying device based on magnetoelectric coupling comprises an induction charge spraying device, a flue gas induction charge device, a dust removing device and a recycling device. The induction charge spraying device comprises an air compressor 14, a gas transmission pipeline 11, a water tank 6, a water pump 4, a water transmission pipeline 5, a magnetizing device 24 and a combined electrode, wherein the air compressor 14 is connected with the combined electrode through the gas transmission pipeline 11, a valve 13 and a pressure gauge 12 are arranged on the pipeline, and the pipeline is connected to the gas transmission pipeline 11 through the water pump 4 through the water transmission pipeline 5; the magnetizer 24 is an electromagnetic magnetizer, common liquid water in the water tank 6 is pumped into the water conveying pipeline 5 by the water pump 4, the common liquid water is converted into magnetized water after passing through the magnetizer 24, and the magnetized water forms electrified magnetized water spray through the combined electrode and enters the dust removal tower 8; as shown in fig. 2-3, the combined electrode includes a nozzle electrode 15 and a ring-needle composite electrode 22, the nozzle electrode 15 is a high-voltage nozzle connected to a power supply, the mist generated by the high-voltage nozzle is thinner than the mist generated by other types of nozzles, and is easier to adsorb and capture dust, the ring-needle composite electrode 22 is in a form of combining the annular electrode 3 with the needle electrode, and the mist is charged by using two modes of induction charging and corona charging, so that the instability of single electrode charging in a spray zone is avoided, and the stability and continuity of a droplet charging process are ensured. The combined electrodes can obviously reduce the particle size and speed of liquid drops, enhance the stability of spraying and set the number of the combined electrodes according to actual conditions. The number of the combined electrodes in the embodiment is two, the annular electrode 3 and the ring-needle combined electrode 22 are made of stainless steel, the electrode distance between the nozzle electrode 15 and the ring-needle combined electrode 22 in the combined electrode needs to be adjusted according to the effective range, the atomization angle and the particle size state of the spray, an initial electrode distance is selected, the combined electrode starts to work, the spray state is stable, the particle size of the spray is measured by using a laser particle size analyzer, the atomization image is shot by using a camera, the size of the atomization angle in the atomization image is measured by using a protractor, the electrode distance is adjusted, the adjusting process is repeated until the atomization angle reaches 60 degrees, the particle size of the spray is about 5 micrometers, the optimal atomization state is achieved, the effective range is adjusted according to the actual dust concentration needing to be purified or the height of a dust removal tower, and the spray is filled in the.

The flue gas induction device comprises a power supply 2 and an annular electrode 3;

the dust removal device comprises a dust inlet 1, a dust removal tower 8, a dust outlet 10, a dust concentration sensor 19, a dust particle size analyzer 20, a second fan 9 and a PLC26, wherein the dust inlet 1 is connected with the dust removal tower 8 through a smoke conveying pipeline 25, an annular electrode 3 surrounds the outer side of the smoke conveying pipeline 25 close to the dust inlet 1, as shown in FIG. 4, a baffle 28 is welded on the inner wall of the smoke conveying pipeline 25 close to the dust inlet 1, a dust collecting groove 16 is arranged in the smoke conveying pipeline 25 connected with the dust removal tower 8 close to the dust inlet 1 and used for collecting dust with large particle diameter intercepted by the baffle 28, the baffle 28 is arranged above the dust collecting groove 16 and perpendicular to the dust inlet direction, the number of the baffle 28 is 3-5, and the baffle 28 in the embodiment has an included angle of 45 degrees with the side wall of the smoke conveying pipeline 25, and the number of the baffles 28 is 5. The dust inlet 1 is connected with the lower part of the dust removing tower 8 through a smoke conveying pipeline 25, the dust concentration sensor 19 and the dust particle size analyzer 20 are arranged at the interface of the smoke conveying pipeline 25 connected with the dust outlet 10 at the upper part of the dust removing tower 8, the PLC26 is electrically connected with the dust concentration sensor 19, the dust particle size analyzer 20 and the second fan 9, and an ash bucket 7 is arranged in the dust removing tower 8; the water tank 6 is located the 8 bottoms of gas wash tower, and the water in the water tank 6 passes through water pump 4 and gets into response electric charge atomizer, installs the one-way membrane of permeating water in the junction of water tank 6 and conduit 5 to guarantee the pureness of purifier middling water, thereby realize the cyclic utilization of water. The model of the dust concentration sensor in this example is GCG-1000, and the model of the dust particle size analyzer is Mastersizer 3000E.

The recycling device comprises an ash bucket 7 in a dust removing tower 8, a multiple filter screen 18, a water tank 6, a water pump 4, a water pipeline 5 and a first fan 27, wherein the first fan 27 is electrically connected with the PLC, the multiple filter screen 18 is arranged between the water tank 6 and the dust removing tower 8 and is provided with a pulse ash removal device, a compact grid-shaped inclined steel frame 23 is arranged below the multiple filter screen 18, a permeable non-woven fabric is laid on the compact grid-shaped inclined steel frame 23, and the pulse ash removal device can clean impurities in sewage intercepted on the multiple filter screen 18 to the permeable non-woven fabric; the compact latticed inclined steel frame 23 has a self-vibration function, impurities can be vibrated to the bottom end of the compact latticed inclined steel frame 23, and the outer side of the upper portion of the water tank 6 close to the ground is arranged to be in a sliding door mode, so that the permeable non-woven fabric is convenient to clean. Water enters a dust removing tower 8 through a water pump 4 and a water pipeline 5 to participate in the purification process of dusty airflow, and sewage is filtered by an ash bucket 7 through a multiple filter screen 18 and returns to a water tank 6 again, so that the water is recycled; the smoke conveying pipeline 25 near the dust outlet 10 of the dust removing tower 8 is arranged in a funnel shape, the dustproof and waterproof breathable film 21 is arranged in the direction close to the dust outlet 10 to ensure the drying of the discharged gas, the funnel-shaped bottom is connected with the water conveying pipeline 5 to be connected to the water tank 6, and the crystal water conveying pipeline 5 intercepted by the dustproof and waterproof breathable film 21 flows back to the water tank 6 to form a water circulation loop.

A dust concentration sensor 19 and a dust particle size analyzer 20 are installed at the joint of a smoke conveying pipeline 25 of the dust removal tower 8, which is connected with the dust outlet 10, a fan II 9 in the dust removal device is installed at the position, close to the dust outlet 10, of the pipeline and used for exhausting gas meeting emission requirements, a fan I27 in the recycling device is installed in the branch of the smoke conveying pipeline 25 and forms a loop with the dust removal tower 8, and the gas not meeting the emission standards is exhausted into the dust removal tower 8 again for dust removal.

The dust settling and purifying method of the suspended cloud and mist dust settling and purifying device based on magnetoelectric coupling specifically comprises the following steps:

the method comprises the following steps: the dusty waste gas enters the smoke conveying pipeline 25 from the dust inlet 1, the baffle 28 settles the dust with large particle size into the dust collecting tank 16, the waste gas from which the dust with large particle size is removed passes through the smoke conveying pipeline 25 and a smoke induction charge device consisting of the power supply 2 and the annular electrode 3, so that the dust in the waste gas is positively or negatively charged, and the dusty airflow with charges continuously enters the dust removing tower 8 through the smoke conveying pipeline 25;

step two: starting a water pump 4 to pump common liquid water in a water tank 6 into a water conveying pipeline 5 through a one-way permeable membrane and change the common liquid water into magnetized water through a magnetizing device 24, simultaneously starting an air compressor 14 to pressurize air, enabling the magnetized water and high-pressure air to enter a combined electrode through a valve 13 and a pressure gauge 12 to form magnetized water spray with charges opposite to dust-containing airflow, and spraying the magnetized water spray onto the upper part of a dust removal tower 8;

step three: the dust-containing air flow with opposite charges and the magnetized water spray are fully combined in the dust removing tower 8, the magnetized water spray adsorbs and captures dust and discharges sewage through the ash bucket 7, and the sewage is filtered by the multiple filter screens 18 and enters the water tank 6 again; the purified gas passes through a dust concentration sensor 19 and a dust particle size analyzer 20, the dust concentration sensor 19 and the dust particle size analyzer 20 transmit detected dust concentration and particle size signals to a PLC26, if the concentration and particle size of dust in the purified gas received by the PLC26 both meet particulate matter emission standards in the Integrated emission Standard of atmospheric pollutants, the PLC26 starts a second fan 9 close to the dust outlet 10, and the second fan 9 works to discharge the gas from the dust outlet 10; if any one of the concentration and the particle size of the dust in the purified gas received by the PLC26 does not meet the particulate matter emission standard in the air pollutant comprehensive emission standard, the PLC26 controls a first fan 27 located in the other smoke conveying pipeline 25 to start to work, so that the smoke returns to the dust removal tower 8 to be subjected to dust removal again until the concentration and the particle size of the dust meet the standard and can be discharged from the dust outlet 10, and dust purification is completed.