CN107715639B - Electrostatic and particle moving bed filtering and elutriation coupled dust removal system and method - Google Patents
Electrostatic and particle moving bed filtering and elutriation coupled dust removal system and method Download PDFInfo
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- CN107715639B CN107715639B CN201711172722.5A CN201711172722A CN107715639B CN 107715639 B CN107715639 B CN 107715639B CN 201711172722 A CN201711172722 A CN 201711172722A CN 107715639 B CN107715639 B CN 107715639B
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- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
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Abstract
The invention relates to a static and particle moving bed filtering and elutriator coupled dust removing system and a method. By adopting the invention, the submicron dust separation efficiency is greatly improved, and the dust content of tail gas can be less than 20mg/m3The environment-friendly requirement of the method, and the high-efficiency separation of the granular layer and the fine dust is realized. Can be used for separating and dedusting high-temperature and wet materials.
Description
Technical Field
The invention relates to a filtering and dust removing system, in particular to a system and a method for filtering and elutriating coupled dust removal by a static and particle moving bed.
Background
The residue discharged by combustion in industrial production is an important source of PM2.5, and the removal of the residue mainly adopts the technologies of mechanical dust removal, wet dust removal, electric dust removal, filtration dust removal and the like.
The cyclone separator is used as a mechanical dust removal technology, and the dust removal mechanism is as follows: the cyclone separator belongs to a dry type gas-solid separation device, is suitable for purifying dust with the particle size of more than 5-10 microns, and has lower separation efficiency on ultrafine particles with the diameter of less than 1 micron.
The wet dust removal technology needs to add liquid as a purification medium, and the wet dust remover has the advantages of higher dust removal efficiency, capability of absorbing other harmful components in dust-containing gas and reduction of gas temperature while removing dust; can treat dust-containing gas with high relative humidity and corrosiveness. The disadvantages are that: the discharged dust-containing sewage is required to be provided with a sewage treatment facility for secondary treatment; the overall energy consumption is high; and is not suitable for occasions with dryness requirements on the medium.
The electrostatic dust collector has complex equipment and high equipment allocation, transportation, installation, maintenance and management levels; the specific resistance of the dust has certain requirements, and all the dust cannot obtain high purification efficiency; is greatly influenced by operating conditions such as gas temperature. For submicron dust with fine dust particle size, the electrostatic dust collector has low separation efficiency, needs a multistage series operation mode, and often needs 3-5 electric fields connected in series for dust removal, thus causing large equipment investment and high operation and maintenance cost.
The filtering and dust removing technology comprises a bag-type dust remover, a particle layer moving bed dust removing device and the like. Although the granular layer moving bed dust removal device has the advantages of high temperature resistance, wear resistance, corrosion resistance and the like, submicron dust is difficult to remove, the separation efficiency is low, and the granular layer and fine dust are difficult to separate, so that the application of the granular layer moving bed dust removal device is limited.
At present, the separation of the ultra-fine dust with the particle size of less than 1 micron can be realized only by a bag-type dust remover or an electric dust remover in the industry. The bag-type dust collector has a certain limit on the temperature bearing capacity, measures must be taken to reduce the temperature of the flue gas firstly when the flue gas with higher temperature is purified, and carried dust has stronger hygroscopicity on the occasions with more moisture in the discharged gas, so that filter bags are often bonded and filter materials are blocked.
Disclosure of Invention
In order to solve the problems that the submicron dust separation efficiency is low and the particle layer and the fine dust are difficult to separate in the prior art, the invention provides a dust removal system coupling static electricity, particle moving bed filtration and an elutriator.
The technical scheme of the invention is as follows:
the electrostatic and particle moving bed filtering and elutriation coupled dust removal system comprises an electrostatic loading device, a coarse particle circulating system, a particle moving bed filter, a particle hopper, a cloth bag recovery system and an elutriator; a dust-containing gas inlet pipe and an inlet distributor are arranged on one side of the particle moving bed filter, a purified gas outlet is arranged on the other side of the particle moving bed filter, and a top inlet is connected with a particle hopper; the electrostatic loading device comprises an electrode arranged in the air inlet distributor; the elutriator is connected with a particle outlet at the bottom of the particle moving bed filter, one side of the elutriator is connected with a fan, the fan is respectively connected with an air inlet and a discharge port of the elutriator through a flow regulating valve, the discharge port of the elutriator is connected to an inlet of a particle hopper through a coarse particle circulating system, and the coarse particle circulating system is connected to the particle hopper through a lifting pipe; the cloth bag recovery system is connected with the gas outlet of the elutriator, the top of the cloth bag recovery system is provided with a purified gas outlet, and the bottom of the cloth bag recovery system is provided with a dust outlet.
It is preferable that: the electrostatic loading apparatus further comprises an electrode disposed within the particle hopper, the charge within the particle hopper being opposite to the charge within the inlet gas distributor.
It is preferable that: the electrodes in the air inlet distributor and the electrodes in the particle hopper are connected to a high-voltage power supply through protective resistors.
It is preferable that: a discharge valve is arranged between the particle moving bed filter and the elutriator.
The invention also provides a dust removal method adopting the electrostatic and particle moving bed filtration and elutriation coupled dust removal system, wherein after dust-containing gas enters the gas inlet distributor through the dust-containing gas inlet pipe, the electrode charges ultrafine dust carried by the gas; the particle moving bed filter is internally provided with filtering carrier particles, the filtering carrier particles slowly move downwards to form a fixed bed moving slowly downwards under the condition of keeping compact filling, dust-containing gas after charging horizontally enters the filter main body, cross flow passes through the particle layer moving slowly downwards, contained ultrafine dust is collected by the particle layer, and purified gas is discharged from a gas outlet; the ultrafine dust adsorbed and trapped by the filter carrier particles moves together with the filter carrier particles and enters an elutriator downwards, and the filter carrier particles and the ultrafine dust are elutriated and separated in the elutriator; the filter carrier particles after elutriation and separation return to the particle hopper for recycling through the coarse particle circulating system, the fine particles enter the cloth bag recovery system along with the gas outlet of the elutriator, the gas is directly emptied after being purified by the cloth bag recovery system, and the fine particles are discharged from the bottom.
It is preferable that: electrodes are arranged in the particle hopper to charge the filter carrier particles, and the charge polarity of the filter carrier particles is opposite to that of the ultrafine dust in the dust-containing gas.
The electrode of the electrostatic loading device is consistent with the electric dust removal device, the electric charge is carried out in a wire-tube structure corona discharge mode, a corona wire is connected with negative high voltage, and a non-uniform electric field is formed at the front end of the filter. Only the corona wire starts corona, so only ions with negative charges exist in a discharge migration region, when dust-containing airflow enters the air inlet distributor, the ions moving in a certain direction under the action of an electric field collide with the ultrafine dust to charge the ultrafine dust, and finally the ultrafine dust mostly obtains negative charges. Since positive ions are present only in the corona region, and since the corona region is small in volume, only a small amount of ultrafine dust can be encountered and charged, and since the corona region is a plasma region, the charges on the ultrafine dust are easily neutralized by heterogeneous charges, and thus, the dust is not deposited on the discharge electrode.
In order to further improve the filtering effect, the positive electrode plate is arranged in the particle hopper, the positive electrode is used for charging the filtering carrier particles, and the charging polarity of the filtering carrier particles is opposite to that of the ultrafine dust in the dust-containing gas, so that the filtering carrier particles can adsorb the ultrafine dust in the dust-containing gas by using electrostatic attraction, and the dust removal efficiency of the particle layer is effectively improved.
The filter support particles are generally selected to have a specific resistance of 104～1010The method is characterized in that large easily-conductive particles such as slag and metal balls of omega cm are selected, the particle size of the particles is usually 1-50 mm, and further, filtering effect is enhanced, filtering carrier particles with different thicknesses and different scales are selected to be combined and filled, so that gaps among particle layers are reduced.
In order to ensure the safe and stable operation of the electrostatic loading device, insulators such as a support cathode, a power supply lead through a wall and an earth insulation are made of special high-strength electroceramics.
The superfine dust adsorbed and trapped by the filter carrier particles moves together with the filter carrier particles and enters the elutriator downwards, and a discharge valve is arranged between the filter and the elutriator to control the particle moving speed and improve the filtering effect. The filtering carrier particles and the adsorbed superfine dust are elutriated and separated in an elutriator, and the filtering carrier particles and the superfine dust are separated in thickness by utilizing the shearing action of normal-temperature air flow conveyed by a fan. In order to further improve the elutriation and separation effect, the material inlet at the upper part of the elutriator and the elutriator are both provided with a grounding to eliminate the residual electrostatic force of the two particles.
The elutriator is a device for classifying and elutriating coarse and fine particles in the production of plastic granules (the invention patent: plastic granule inertia elutriator and elutriation process and application thereof, the patent number: ZL200810249628.X) and can also be used for classifying and cleaning the production of other granules. The elutriator invented by the inventor utilizes airflow shearing force to shear and separate dust adsorbed on the surface of large particles, and also utilizes special internal parts to eliminate electrostatic force of the particles, thereby effectively improving the elutriation and separation effects.
Due to the cooling and heat exchange effect of the air flow, the temperature of the ultrafine dust after the coarse and fine separation and the gas blown into the elutriator are in a low-temperature state, so that the temperature-resistant requirement of the bag-type dust remover can be met, the ultrafine dust enters a bag recovery system along with the gas at a gas outlet for gas-solid separation, and the ultrafine dust is discharged out of the system from a dust discharge port of the bag-type dust remover; directly discharging outlet gas purified by the bag-type dust collector; the filter carrier particles after the coarse and fine separation are discharged from the lower part of the elutriator and then are conveyed and lifted into a particle hopper through air flow, so that the recycling of the filter carrier particles is realized.
The gas inlet quantity of the elutriator is determined by the quantity of the filter carrier particles and the superfine dust, and the volume of the elutriator is greatly reduced compared with the quantity of the dust-containing gas required to be purified (about 1/10-1/50 of the treated dust-containing gas), so that when the elutriator is used for purifying the flue gas, only one set of smaller elutriation and separation system is needed to be added, and the added elutriator, the fan and the bag-type dust remover have lower equipment investment and running cost.
When the higher unable sack cleaner that adopts of flue gas temperature purifies, adopt the usable filter of this system to realize gaseous purification, then utilize the normal atmospheric temperature air current to carry out the heat transfer cooling to the high temperature filtration carrier particle and the superfine dust that get into the elutriator, reach the temperature resistant requirement of sack cleaner, the gas that uses the sack cleaner that can be convenient to go out the elutriator purifies.
The existing granular layer moving bed dust removal device utilizes high-temperature resistant solid particles to form a filter layer to filter dust. In order to facilitate the separation of the filter carrier particles from the fine dust, the filter carrier particles used have a particle size of more than 1mm, and larger particles are present between the particlesA void of (a); because the ultra-fine dust has good following performance, when the airflow flows through the filter layer, the airflow often passes through the gaps of the particle layer together with the airflow and is not intercepted, so that the separation efficiency of the particle layer moving bed dust removal device on the ultra-fine dust is not high, and the dust content of the tail gas can only reach less than 200mg/m3。
By adopting the electrostatic and particle moving bed coupled filtering and dust removing device provided by the invention, when airflow carries ultrafine dust to flow through the filtering layer, because the charged polarities of the filtering carrier particles are opposite to those of the ultrafine dust in the dust-containing gas, the filtering carrier particles can adsorb the ultrafine dust in the dust-containing gas by using electrostatic attraction, the dual functions of filtering and electrostatic adsorption are simultaneously realized in the same device, and the separation efficiency of the ultrafine submicron dust is greatly improved.
By adopting the invention, the submicron dust separation efficiency is greatly improved, and the dust content of tail gas can be less than 20mg/m3The environment-friendly requirement of the method, and the high-efficiency separation of the granular layer and the fine dust is realized. Can be used for separating and dedusting high-temperature and wet materials.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Wherein: 1. riser 2, high voltage power supply 3, protective resistor 4, particle hopper 5, electrode 6, filter 7, bag-type dust remover 8, elutriator 9, flow regulating valve 10 and fan
Detailed Description
Example 1
The electrostatic and particle moving bed coupled filtering and dedusting system comprises a filter 6, a particle hopper 4 connected with an inlet at the top of the filter 6, an electrode arranged in the filter 6, an elutriator 8 connected with an outlet at the bottom of the filter 6 and a bag-type dust remover connected with another outlet of the filter, wherein a dust-containing gas inlet is arranged at one side of the filter 6, and a purified gas outlet is arranged at the other side of the filter; the electrode in the filter 6 is connected with the high-voltage power supply 2 after being connected with the protective resistor 3 in series; one side of the elutriator 8 is connected with a fan 10, the fan is respectively connected with an air inlet and a discharge port of the elutriator 8 through a flow regulating valve 9, one path of air at the outlet of the fan goes to the elutriator to carry out the thickness separation of particles and dust, and the other path of air connects the discharge of the elutriator to the inlet of a particle hopper through a lifting pipe 1; a discharge valve is arranged between the filter 6 and the elutriator 8; the top of the bag-type dust collector 7 is provided with a purified gas outlet, and the bottom is provided with a dust outlet.
The dust removal process is as follows: the dust-containing gas enters the filter through the gas inlet pipe, the ultrafine dust in the dust-containing gas is charged by using an electrode arranged in the filter, the charged dust-containing gas horizontally enters the moving bed main body, the cross flow passes through the downward moving particle layer, the contained ultrafine dust is trapped by the particle layer, and the purified gas is discharged from the gas outlet and enters the next process.
The superfine dust adsorbed and trapped by the filter carrier particles moves together with the filter carrier particles and enters the elutriator downwards, and the filter and the elutriator are provided with discharge valves to control the particle moving speed and improve the filtering effect. The filtering carrier particles and the superfine dust are elutriated and separated in an elutriator, the residual electrostatic force of the two particles is eliminated in the elutriator, and the filtering carrier particles and the superfine dust are separated in thickness by utilizing the shearing action of normal-temperature air flow conveyed by a fan.
After the temperature is reduced, the superfine dust enters a bag-type dust remover along with gas at a gas outlet for gas-solid separation, and the superfine dust is discharged out of the system from a dust discharge port of the bag-type dust remover; directly discharging outlet gas purified by the bag-type dust collector; the filter carrier particles after the coarse and fine separation are discharged from the lower part of the elutriator and then lifted into the particle hopper by air flow.
The specific resistance of the filter carrier particles is 104～1010And large omega-cm quartz sand particles with the particle size of 1-10 mm are selected.
The existing high-temperature flue gas dust removal, such as high-temperature coal gas, non-ferrous metal smelting flue gas and the like, can not adopt a bag-type dust remover due to high flue gas temperature; the electrostatic dust collection has the defects of large investment, high operation cost and low separation efficiency, so the application of the electrostatic dust collection is limited; therefore, wet scrubbing is usually adopted for high-temperature flue gas purification, and the problems that high-quality heat in the high-temperature flue gas cannot be utilized and the energy consumption is high are brought. By adopting the technology, the high-temperature flue gas dust removal at 800-1000 ℃ can be resisted, the flue gas dust removal efficiency reaches 99.99%, and the dust content of the exhaust gas is less than 20mg/m3The smoke after dust removal and purificationThe gas can enter a subsequent energy recovery system, the heat exchanger is utilized to recover energy, and the problem of blockage of the heat exchanger caused by solid dust contained in the flue gas is solved.
Example 2
The electrostatic and particle moving bed coupled filtering and dedusting system comprises a filter 6, a particle hopper 4 connected with an inlet at the top of the filter 6, an electrode arranged in the particle hopper, an elutriator connected with an outlet at the bottom of the filter 6 and a bag-type dust remover connected with another outlet of the filter, wherein a dust-containing gas inlet is arranged at one side of the filter 6, and a purified gas outlet is arranged at the other side of the filter; the charge in the particle hopper is opposite to the charge in the filter; the electrode in the filter and the electrode 5 in the hopper are connected with a protective resistor in series and then are connected with a high-voltage power supply; one side of the elutriator is connected with a fan, and the fan is connected with an outlet of the elutriator in parallel through a flow regulating valve and then is connected to an inlet of the particle hopper through a lifting pipe; a discharge valve is arranged between the filter and the elutriator; the top of the bag-type dust collector is provided with a purified gas outlet, and the bottom of the bag-type dust collector is provided with a dust outlet.
The dust removal process is as follows: the dust-containing gas enters the filter through the air inlet pipe, the ultrafine dust in the dust-containing gas is charged by utilizing an electrode arranged in the filter, the charged dust-containing gas horizontally enters the moving bed main body, the cross flow passes through the particle layer moving downwards, the contained ultrafine dust is collected by the particle layer and adsorbed by the electrostatic attraction, and the purified gas is discharged from the gas outlet.
The superfine dust adsorbed and trapped by the filter carrier particles moves together with the filter carrier particles and enters the elutriator downwards, and the filter and the elutriator are provided with discharge valves to control the particle moving speed and improve the filtering effect. The filtering carrier particles and the superfine dust are elutriated and separated in an elutriator, the residual electrostatic force of the two particles is eliminated in the elutriator, and the filtering carrier particles and the superfine dust are separated in thickness by utilizing the shearing action of normal-temperature air flow conveyed by a fan.
The ultra-fine dust enters a bag-type dust remover along with gas at a gas outlet for gas-solid separation, and the ultra-fine dust is discharged out of the system from a dust discharge port of the bag-type dust remover; directly discharging outlet gas purified by the bag-type dust collector; the filter carrier particles after the coarse and fine separation are discharged from the lower part of the elutriator and then lifted into the particle hopper by air flow.
The specific resistance of the filter carrier particles is 104～1010And (3) large omega-cm ceramsite particles with the particle size of 1-10 mm.
The existing industrial kiln waste gas emission treatment technology comprises the following steps: the bag-type dust collector is not suitable for occasions with high water content in flue gas, and the problem of bag pasting failure exists; the electrostatic dust collection has the defects of large investment, high operation cost and low separation efficiency, so the application of the electrostatic dust collection is limited; the secondary treatment problem of the washing liquid is often brought by wet washing and dust removal. By adopting the technology, the purification and emission of various flue gases can be met, the flue gas dust removal efficiency reaches 99.99%, and the dust content of the exhaust gas is less than 20mg/m3And reaches the national environmental protection discharge standard.
Example 3:
the specific resistance of the filter carrier particles is 104～1010And large omega-cm slag particles with the particle size of 1-30 mm are selected. The rest is the same as example 1.
Example 4:
the specific resistance of the filter carrier particles is 104～1010And large omega-cm river sand particles with the particle size of 30-100 mm are selected. The rest is the same as example 2.
Claims (4)
1. Static, granule moving bed filters and elutriation coupling dust pelletizing system, its characterized in that: comprises an electrostatic loading device, a coarse particle circulating system, a particle moving bed filter, a particle hopper, a cloth bag recovery system and an elutriator; a dust-containing gas inlet pipe and an inlet distributor are arranged on one side of the particle moving bed filter, a purified gas outlet is arranged on the other side of the particle moving bed filter, and a top inlet is connected with a particle hopper; the electrostatic loading device comprises an electrode arranged in the air inlet distributor; the elutriator is connected with a particle outlet at the bottom of the particle moving bed filter, one side of the elutriator is connected with a fan, the fan is respectively connected with an air inlet and a discharge port of the elutriator through a flow regulating valve, the discharge port of the elutriator is connected to an inlet of a particle hopper through a coarse particle circulating system, and the coarse particle circulating system is connected to the particle hopper through a lifting pipe; the cloth bag recovery system is connected with the gas outlet of the elutriator, the top of the cloth bag recovery system is provided with a purified gas outlet, and the bottom of the cloth bag recovery system is provided with a dust outlet; the electrostatic loading device also comprises an electrode arranged in the particle hopper, and the charge in the particle hopper is opposite to the charge in the air inlet distributor; the electrode of the electrostatic loading device is consistent with the electric dust removal device, the electric charge is carried out in a wire-tube structure corona discharge mode, a corona wire is connected with negative high voltage, and a non-uniform electric field is formed at the front end of the filter; the positive electrode plate is arranged in the particle hopper, the positive electrode is used for charging the filter carrier particles, and the charging polarity of the filter carrier particles is opposite to that of the ultrafine dust in the dust-containing gas; when the airflow carries the superfine dust to flow through the filtering layer, the filtering carrier particles can adsorb the superfine dust in the dust-containing gas by utilizing electrostatic attraction because the charging polarities of the filtering carrier particles are opposite to those of the superfine dust in the dust-containing gas.
2. The electrostatic, particulate moving bed filtration and elutriation coupled dust removal system as claimed in claim 1, wherein: the electrodes in the air inlet distributor and the electrodes in the particle hopper are connected to a high-voltage power supply through protective resistors.
3. The electrostatic, particulate moving bed filtration and elutriation coupled dust removal system as claimed in claim 1, wherein: a discharge valve is arranged between the particle moving bed filter and the elutriator.
4. A method for dust removal using an electrostatic, particle moving bed filtration and elutriation coupled dust removal system as claimed in any one of claims 1 to 3, wherein: after the dusty gas enters the gas inlet distributor through the dusty gas inlet pipe, the electrode charges the ultrafine dust carried by the gas; the particle moving bed filter is internally provided with filter carrier particles, the filter carrier particles slowly downwards form a fixed bed which slowly moves downwards under the condition of keeping compact filling, dust-containing gas after charging horizontally enters the particle moving bed main body, cross flow passes through a particle layer which slowly moves downwards, contained ultrafine dust is collected by the particle layer, and purified gas is discharged from a gas outlet; the ultrafine dust adsorbed and trapped by the filter carrier particles moves together with the filter carrier particles and enters an elutriator downwards, and the filter carrier particles and the ultrafine dust are elutriated and separated in the elutriator; filtering carrier particles after elutriation and separation return to a particle hopper for recycling through a coarse particle circulating system, fine particles enter a cloth bag recovery system along with an air outlet of an elutriator, gas is directly emptied after being purified by the cloth bag recovery system, and the fine particles are discharged from the bottom; arranging electrodes in the particle hopper to charge the filter carrier particles, wherein the charge polarity of the filter carrier particles is opposite to that of the ultrafine dust in the dust-containing gas; the electrode of the electrostatic loading device is consistent with the electric dust removal device, the electric charge is carried out in a wire-tube structure corona discharge mode, a corona wire is connected with negative high voltage, and a non-uniform electric field is formed at the front end of the filter; the positive electrode plate is arranged in the particle hopper, the positive electrode is used for charging the filter carrier particles, and the charging polarity of the filter carrier particles is opposite to that of the ultrafine dust in the dust-containing gas; when the airflow carries the superfine dust to flow through the filtering layer, the filtering carrier particles can adsorb the superfine dust in the dust-containing gas by utilizing electrostatic attraction because the charging polarities of the filtering carrier particles are opposite to those of the superfine dust in the dust-containing gas.
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| CN107715639B true CN107715639B (en) | 2020-04-24 |
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| CN112718243B (en) * | 2019-10-14 | 2022-12-09 | 中国石油化工股份有限公司 | Dust prevention and control device for polyester chip pre-crystallization treatment process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100969A (en) * | 1993-09-27 | 1995-04-05 | 诸城市棉油加工厂 | Static reinforcing type granular-layer duster |
| CN101486032A (en) * | 2008-12-25 | 2009-07-22 | 青岛科技大学 | Inertia elutriator for plastic pellets material as well as elutriation technique and use thereof |
| CN104971569A (en) * | 2015-07-22 | 2015-10-14 | 北京神雾环境能源科技集团股份有限公司 | Particle matter moving bed dust removal device and dust removal method used by dust removal device |
| CN205913942U (en) * | 2016-06-30 | 2017-02-01 | 天津浩创节能环保设备有限公司 | Novel compound dust pelletizing system of static / sack |
-
2017
- 2017-11-22 CN CN201711172722.5A patent/CN107715639B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100969A (en) * | 1993-09-27 | 1995-04-05 | 诸城市棉油加工厂 | Static reinforcing type granular-layer duster |
| CN101486032A (en) * | 2008-12-25 | 2009-07-22 | 青岛科技大学 | Inertia elutriator for plastic pellets material as well as elutriation technique and use thereof |
| CN104971569A (en) * | 2015-07-22 | 2015-10-14 | 北京神雾环境能源科技集团股份有限公司 | Particle matter moving bed dust removal device and dust removal method used by dust removal device |
| CN205913942U (en) * | 2016-06-30 | 2017-02-01 | 天津浩创节能环保设备有限公司 | Novel compound dust pelletizing system of static / sack |
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