CN102688847A - Dry cassava raw material screening device - Google Patents

Dry cassava raw material screening device Download PDF

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Publication number
CN102688847A
CN102688847A CN2012101384989A CN201210138498A CN102688847A CN 102688847 A CN102688847 A CN 102688847A CN 2012101384989 A CN2012101384989 A CN 2012101384989A CN 201210138498 A CN201210138498 A CN 201210138498A CN 102688847 A CN102688847 A CN 102688847A
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China
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dust
main body
raw material
sand
fine powder
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CN2012101384989A
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CN102688847B (en
Inventor
岳国海
张维秀
杨晓光
杨素珍
陶琳
刘克
刘华
唐玉梅
于春梅
王清媛
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Petrochina Jilin Chemical Engineering Co ltd
Jilin Design Institute
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Jilin Design Institute
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Publication of CN102688847B publication Critical patent/CN102688847B/en
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Abstract

The invention relates to a granular raw material separating device, and discloses a dry cassava raw material screening device. The dry cassava raw material screening device is characterized in that a rotary hook is arranged on the inner upper portion of a main body, a rotary drum screening machine or a vibrating screening machine is disposed in the middle of the inside of the main body, a sandy fine powder collecting barrel is arranged on the inner lower portion of the main body, a sandy fine powder collecting storage tank is arranged on the outer lower portion of the main body, a dust recycling tank is disposed on the upper outer side of the main body, and bulky materials in dry cassava raw materials are separated from sandy fine powdery materials. The dry cassava raw material screening device has the advantages that clean screening production of the dry cassava raw materials is realized, and production is safe and clean; sand is individually removed, sand removal workload for the cassava raw material is greatly reduced, and conditions for thoroughly removing the sand in the raw materials are provided; a dust recycling device is adopted, dust loss is reduced, and improvement of wine yield of the raw materials is benefited; and slurry generated by recycling the dust is completely recycled for crushing and mixing raw materials in a crushing procedure, and purposes of saving water and reducing consumption are achieved.

Description

The screening plant of the dried raw material of cassava
Technical field
The present invention relates to a kind of separator of particulate material, relate in particular to a kind of dried with cassava be the screening plant of raw material.
Background technology
Along with the continuous scarcity of petroleum-based energy, countries in the world are all at the energy products of actively seeking alternative oil.For this reason, biomass energy also just becomes the research and development focus of the world today.Alcohol fuel has been widely used in automotive field and has partly substituted Fuel Petroleum owing to have combustion cleaning, high-octane rating, renewable, bioenergy such as raw material sources is extensive.
At present, be used for raw material for fuel ethanol production and mainly contain corn, wheat, sugarcane or molasses, cassava, Ipomoea batatas, beet or the like starchiness class raw material.The U.S. mainly is the raw material production alcohol fuel with the corn; Brazil mainly produces alcohol fuel with sugarcane or cane molasses; China is owing to be populous nation; The grain security problem is original just very outstanding, and the development alcohol fuel just must be walked the road of non-grain ethanol, and National Development and Reform Committee proposes the development alcohol fuel; Adhere to the principle of " do not strive grain, do not strive ground " with grain with the people.For this reason, produce the raw material of alcohol fuel, mainly concentrate on cassava, sweet potato, bajiao banana taro, the root of kudzu vine, sugar grass and stalk etc., what current application was maximum is the cassava raw material.
China is with cassava raw material production ethanol, and its raw material sources are mainly ground import and domestic cassavas such as Thailand, Cambodia, Vietnam, because the dried raw materials quality of cassava is uneven; Some countries particularly, the dried natural drying that belongs to of cassava, impurity content is higher; Under the situation of raw material supply and demand anxiety; Some material suppliers also can add extra large sand artificially in the dried raw material of cassava, brought very large harm for Alcohol Production enterprise.
Now, dried with cassava is the Alcohol Production enterprise of raw material, after raw material enters factory; At first adopt in the storehouse or the air storage storage, adopt artificial unpacking during production, directly transport to pulverizing process with little forklift; In the hopper, open ground pit type material loading trench bottom flashboard on the ground pit type before being discharged into belt and carrying, under the raw material to belt conveyor; Raw material in the course of conveying, adopts the artificial foreign material such as the woven bag bar in the cassava raw material, broken fag end, ratchel that pick on belt, in the belt conveyor end tramp iron separator is installed; Ironware in the raw material is absorbed, and then, raw material gets into pulverizer and pulverizes.The sand removing process using that is adopted carries out spice for after the raw material pulverizing mostly, and the feed liquid behind the spice adopts desilting ditch or riffler; Artificial intermittently sand removing process using, artificial intermittently operated, the subject matter of existence is that to remove sand coarse aggregate ratio very low, is merely about 30%; Contain starch granules in the sand, be not easy to wash out, thrown away, cause the loss of tapioca with sand; Cause alcohol yield to reduce, contain sand in the feed liquid, serious in the production process to equipment attrition, have a strong impact on service life of equipment.
According to the analysis of the dried raw material of cassava, the particle diameter of sand in cassava does, generally all below 5mm and the dried fine powder of cassava mix; Even contain the sand fine powder during cassava does below the 5mm, shared cassava gross dry weight ratio is generally 15%~30%; For the purpose of desanding, the new technology of the dried raw material desanding of a kind of cassava is provided, sieve out with containing the sand fine powder; Not only want the desanding expense to reduce greatly, also energy-saving and cost-reducing to Alcohol Production, play important effect.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, provide a kind of dried with cassava be the device of the desanding of raw material
The dried material screening device of a kind of cassava; Comprise the closed bucket elevator, contain sand fine powder wind and send device, closed belt conveyor; The suspension tramp iron separator is characterized in that the top in the main body is provided with Rotary hanging hook; The middle part is provided with electronic rotary screen extension set, and the bottom is provided with and contains sand fines collection barrel; The outer bottom of main body is provided with and contains sand fines collection basin, and the outer top of main body is provided with the dust recycling can; Rotary screen extension set inclination angle is 10 °~15 °, and mesh size is 3~5mm, rotates through screen roller in the electronic screening machine; Large-block material in the dried raw material of cassava is separated with the powder material that contains sand, and bulk materials constantly flows to the screening machine below in the cylinder screen cloth, at last from the screening machine discharging opening; Outflow is sealed the formula belt conveyor; Deliver to feed bin, contain the sand fine powder and constantly fall, fall in the fines collection tube from the sifted mesh; Top in the main body is provided with high level alarm, and the bottom in the main body is provided with low-level alarm; Top in the main body is provided with Rotary hanging hook, and Rotary hanging hook divides the machine cylinder rotation with rotary screen, and woven bag bar in the raw material and fag end are collected on the hook, mainly plays the effect of removing thread foreign material in the raw material; Bottom in the main body is provided with the blanking push-pull valve, carries out blanking through control blanking push-pull valve, send device through containing sand fine powder wind, and fine powder is delivered to the spice desanding system; Described device for recovering powder is provided with induced-draught fan and dust recycling can at closed screening machine top, and dust recycling can inner top is provided with the water distribution sieve plate; The fresh water (FW) spray equipment sprays into process water from dust recycling can top, water is evenly distributed on the sieve plate, and the fresh water (FW) under the sieve plate orifice flow mixes with the air-flow that contains dust; Dust in the air-flow is dissolved in the water; Fall at the bottom of the dust recycling can, reach dust and reclaim purpose, the air that is purified; Behind the exhaust gas collection device of dust recycling can top, directly emptying.The dust slip that reclaims after the stirring of dust recycling can side agitator, is transported to the raw material pulverizing operation, is used for spice.
The dried material screening device of a kind of cassava; Comprise the closed bucket elevator, contain sand fine powder wind and send device, closed belt conveyor; The suspension tramp iron separator is characterized in that, is provided with electronic bolting machine in the main body; The bolting machine has vibration screen, and the bottom is provided with and contains sand fines collection barrel; The outer bottom of main body is provided with and contains sand fines collection basin, and the outer top of main body is provided with the dust recycling can; The screening machine inclination angle is 10 °~15 °, and mesh size is 3~5mm, through screening machine internal vibration screen cloth; Large-block material in the dried raw material of cassava is separated with the powder material that contains sand, and bulk materials constantly flows to the screening machine below in the cylinder screen cloth, at last from the screening machine discharging opening; Outflow is sealed the formula belt conveyor; Deliver to feed bin, contain the sand fine powder and constantly fall, fall and contain in the sand fines collection barrel from screening machine vibratory sieve mesh; Top in the main body is provided with high level alarm, and the bottom in the main body is provided with low-level alarm; Bottom in the main body is provided with the blanking push-pull valve, carries out blanking through control blanking push-pull valve, send device through containing sand fine powder wind, and fine powder is delivered to the spice desanding system; Be provided with induced-draught fan and dust recycling can at closed screening machine top, dust recycling can inner top is provided with the water distribution sieve plate; The fresh water (FW) spray equipment sprays into process water from dust recycling can top, water is evenly distributed on the sieve plate, and the fresh water (FW) under the sieve plate orifice flow mixes with the air-flow that contains dust; Dust in the air-flow is dissolved in the water, falls at the bottom of the dust recycling can, reach dust and reclaim purpose; The air that is purified, after the dust of dust reclaims the exhaust gas collection transposition, directly emptying.The dust slip that reclaims after the stirring of dust recycling can side agitator, is transported to the raw material pulverizing operation, is used for spice.
The present invention has the following advantages:
1, the raw material material loading adopts closed bucket elevator, closed screening machine and dust to reclaim the new structure device, has realized the cleaning production of the dried material screening of cassava, makes production safer and clean.
2, before raw material pulverizing, sieve, with in the raw material greater than the cassava piece of 5mm with less than the tapioca starch of 5mm, separate through screening machine; Reduce the raw material pulverizing amount, reduced the pulverizing energy consumption, can be to containing the sand tapioca starch less than 5mm; Carry out desanding separately; Significantly reduced the workload of cassava raw material desanding,, condition is provided for thoroughly removing the sand in the raw material.
3, material screening process adopts device for recovering powder, has reduced dust loss, helps liquor ratio of raw material, and working environment is cleaner simultaneously.
4, dust reclaims the powder slurry that produces, and all reclaims to be used for pulverizing process raw material pulverizing spice, has reached the water-saving consumption-reduction purpose.
Description of drawings
Fig. 1 is a closed rotary screen extension set sketch map of the present invention.
Airtight bucket elevator 1, Rotary hanging hook 2, closed rotary screen extension set 3, hand opening door 4, sifted net drum 5 are arranged among the figure; High level alarm 6 contains sand fines collection barrel 7, and blanking push-pull valve 8 contains sand fine powder wind and send device 9, dust recycling can 10, fresh water (FW) spray equipment 11; Agitator 12, belt conveyor 13, suspension tramp iron separator 14, induced-draught fan 15, low-level alarm 16; Contain sand fines collection basin 17, contain sand fine powder conveying pipeline road 18, closed conveyer belt open section 19, screening back raw material removes pulverizing process 20, sieve plate 21; Exhaust gas collection device 22 removes spice 23, dust collection transfer pipeline 24, stream pipe 25, feeding port 26.
Fig. 2 is a closed bolting machine sketch map of the present invention
Airtight bucket elevator 1, bolting machine 33, hand opening door 4, screening machine vibrating screen mesh 55, high level alarm 6 are arranged among the figure; Contain sand fines collection barrel 7, blanking push-pull valve 8 contains sand fine powder wind and send device 9, dust recycling can 10; Agitator 12, belt conveyor 13, suspension tramp iron separator 14, induced-draught fan 15, low-level alarm 16; Contain sand fines collection basin 17, contain sand fine powder conveying pipeline road 18, closed conveyer belt open section 19, screening back raw material removes pulverizing process 20, sieve plate 21; Exhaust gas collection device 22 removes spice 23, dust collection transfer pipeline 24, stream pipe 25, feeding port 26.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is made detailed description further.
As shown in Figure 1, the top in the main body is provided with Rotary hanging hook 2, and the middle part is provided with electronic rotary screen extension set 3, and the bottom is provided with and contains sand fines collection barrel 7; The outer bottom of main body is provided with and contains sand fine powder wind and send device 9 and contain sand fines collection basin 17, and the outer top of main body is provided with dust recycling can 10; Feeding port 26 chargings, through airtight bucket elevator 1 and stream pipe 25, material advances rotary screen extension set 3; Rotary hanging hook 2 is installed on rotary screen extension set 3, is provided with hand opening door 4, sifted net drum 5 and high level alarm 6 are installed in rotary screen extension set 3 in rotary screen extension set 3 outsides; Below rotary screen extension set 3, be provided with and contain sand fines collection barrel 7, during the fine powder blanking, push-pull valve 8 is arranged; Containing on the sand fines collection barrel 7, low-level alarm 16 is being installed.
Impurity removing: be installed in the Rotary hanging hook 2 on the rotary screen; With rotary screen extension set 3; Raw material in the screen cloth tube rotates together, and with the strand shape foreign material that are mixed in the raw material, extension is entangled on the Rotary hanging hook 2; Avoid the strand shape foreign material in the raw material to flow into next procedure, reached the purpose of removing the strand shape foreign material in the raw material; When rotary screen extension set 3 stops to sieve raw material, open the hand opening door 4 on the rotary screen extension set 3, the strand shape foreign material removing that winding is suspended on the Rotary hanging hook 2 is thrown away; Simultaneously, greater than the cassava piece of mesh size, on belt conveyor 13, carry, through closed conveying band open section 19, after artificial removal of impurities and 14 deironing of suspension tramp iron separator, the cassava piece raw material after the screening removes pulverizing process 20;
As shown in Figure 2, the middle part in the main body is provided with electronic bolting machine 33, and bolting machine 33 times is provided with the motor-driven sieve screen cloth 55 that shakes of screening; In bolting machine 33 bottoms, be provided with and contain sand fines collection barrel 7; The outer bottom of main body is provided with and contains sand fines collection basin 17, and the top that main body is outer is provided with dust recycling can 10;
Fig. 1 of the present invention and Fig. 2 difference are that one is that screening machine is the rotary screen extension set in the main body, and another is that screening machine is the bolting machine in the main body.
The present invention reclaims, contains the conveying of sand fine powder from chain control, the dust of material loading, raw material material loading, and the situation of drum-type screening machine and oscillatory type screening machine is identical.
Airtight bucket elevator 1 material loading, raw material is delivered to closed bolting machine 33 through flowing son pipe 25, and raw material gets in the electronic vibrating screen mesh 55; Carry out material screening,, will open greater than the cassava piece of mesh size with less than sand, the screening of cassava fine powder of mesh size through the continuous rotation of vibrating screen mesh 55; Greater than the cassava piece of mesh size, on screen cloth,, flow forward along bolting machine 33; From 33 outlets of bolting machine, flow on the belt conveyor 13, see off.
The chain control of raw material material loading: when the material quantity in the screening machine 3 was in a high position, high level alarm 6 started, and slow down hoisting velocity or stop to carry material of the airtight bucket elevator 1 of automatic chain control; When the material level in the bolting machine 33 was lower than a high position, high level alarm 6 automatically terminated, and the airtight bucket elevator 1 of chain promoter, and material is carried in startup and material speed is put forward in raising, strengthened the mass transport amount, had so just guaranteed the stable operation in the material screening process.Greater than the cassava piece of mesh size, on belt conveyor device 13, carry, through closed conveying band open section 19, after artificial removal of impurities and 14 deironing of suspension tramp iron separator, the cassava piece raw material after the screening removes pulverizing process 20;
Dust reclaims: at closed bolting machine 33 tops, be provided with induced-draught fan 15, through dust collection transfer pipeline 24, advance dust recycling can 10, mounting process spray water system 11 and water distribution sieve plate 21 at the top of dust recycling can 10.The air-flow that contains the cassava fine powder that gets into dust recycling can 10 is through centrifugation, and at the bottom of most of dust granules fell into jar, the air-flow that contains low amounts of dust advanced dust recycling can 10; Water flows towards the tank top from sieve plate 21 times, through technology spray water system 11 constantly in jar water distribution sieve plate 21 evenly spray water, water evenly flows downward along water distribution sieve plate 21 mesh; Fully contact with the air-flow that contains low amounts of dust that upwards flows; Dust in the air-flow is recovered to falls into pot bottom in the water, the air-flow that flows out from water distribution sieve plate 21 tops is discharged from tank deck; Get into the dust recovery and be vented to gathering-device 22, last emptying.In addition, the dust of recovery mixes with water in dust recycling can 10, through agitator 12 in the dust recycling can 10, after stirring, is transported to the raw material pulverizing operation and is used for spice.
Containing the sand fine powder carries: in bolting machine 33 bottoms; Contain sand fines collection barrel 7 exits, be connected with blanking push-pull valve 8, blanking push-pull valve 7 with contain sand fine powder wind and send device 9 to be connected; Contain sand fine powder wind and send device 9, through containing sand fine powder conveying pipeline road 18 and containing sand fines collection basin 17 and be connected.The sand fine powder wind that contains that transports out from blanking push-pull valve 8 send device 9 charging apertures, sees off to angle in the same way with wind air-supply, and malleation general mood stream mixes with fine powder and carries fine powder through containing sand fine powder conveying pipeline road 18, fine powder is sent into contain storage in the sand fines collection basin 17; Chain control through low-level alarm 16 and blanking push-pull valve 8 prevents pouring in down a chimney of malleation general mood stream.

Claims (2)

1. dried material screening device of cassava; Comprise closed bucket elevator (1), contain sand fine powder wind and send device (9), closed belt conveyor (13); Suspension tramp iron separator (14) is characterized in that the top in the main body is provided with Rotary hanging hook (2); The middle part is provided with electronic rotary screen extension set (3), and the bottom is provided with and contains sand fines collection barrel (7); The outer bottom of main body is provided with and contains sand fines collection basin (17), and the outer top of main body is provided with dust recycling can (10); Rotary screen extension set inclination angle is 10 °~15 °, and mesh size is 3~5mm, rotates through screen roller (5) in the electronic screening machine; Large-block material in the dried raw material of cassava is separated with the powder material that contains sand, and bulk materials constantly flows to the screening machine below in rotary screen extension set (3) screen cloth, at last from the screening machine discharging opening; Outflow is sealed formula belt conveyor (13); Deliver to feed bin, contain the sand fine powder and constantly fall, fall in the fines collection tube (7) from the sifted mesh; Top in the main body is provided with high level alarm (6), and the bottom in the main body is provided with low-level alarm (16); Top in the main body is provided with Rotary hanging hook (2), and Rotary hanging hook (2) is collected woven bag bar in the raw material and fag end on the hook with sifted net drum (5) rotation, removes thread foreign material in the raw material; Bottom in the main body is provided with blanking push-pull valve (8), carries out blanking through control blanking push-pull valve (8), send device (9) through containing sand fine powder wind, and fine powder is delivered to the spice desanding system; Described device for recovering powder (10) is provided with induced-draught fan (15) and dust recycling can (10) at closed screening machine top, dust recycling can (10) inner top is provided with water distribution sieve plate (21); Fresh water (FW) spray equipment (11) sprays into process water from dust recycling can (10) top, water is evenly distributed on the sieve plate (21), and the fresh water (FW) under the sieve plate orifice flow mixes with the air-flow that contains dust; Dust in the air-flow is dissolved in the water; Fall dust recycling can (10) end, reach dust and reclaim purpose, the air that is purified; After the dust recovery at dust recycling can (10) top is vented to gathering-device (22), directly emptying.The dust slip that reclaims after dust recycling can (10) side agitator (12) stirring, is transported to the raw material pulverizing operation, is used for spice.
2. the dried material screening device of cassava is characterized in that, is provided with electronic bolting machine (33) in the main body, and bolting machine (33) has vibration screen (35), and the bottom is provided with and contains sand fines collection barrel (7); The outer bottom of main body is provided with and contains sand fines collection basin (17), and the outer top of main body is provided with dust recycling can (10); The screening machine inclination angle is 10 °~15 °, and mesh size is 3~5mm, through screening machine internal vibration screen cloth (35); Large-block material in the dried raw material of cassava is separated with the powder material that contains sand, and bulk materials constantly flows to the screening machine below in vibration screen (35), at last from the screening machine discharging opening; Outflow is sealed formula belt conveyor (13); Deliver to feed bin, contain the sand fine powder and constantly fall, fall and contain in the sand fines collection barrel (7) from screening machine vibration screen (35) hole; Top in the main body is provided with high level alarm (6), and the bottom in the main body is provided with low-level alarm (16); Bottom in the main body is provided with blanking push-pull valve (8), carries out blanking through control blanking push-pull valve (8), send device (9) through containing sand fine powder wind, and fine powder is delivered to the spice desanding system; Be provided with dust recycling can (10) at closed screening machine () top, dust recycling can (10) inner top is provided with water distribution sieve plate (21); Fresh water (FW) spray equipment (11) sprays into process water from dust recycling can (10) top, water is evenly distributed on the sieve plate (21), and the fresh water (FW) under the sieve plate orifice flow mixes with the air-flow that contains dust; Dust in the air-flow is dissolved in the water; Fall dust recycling can (10) end, reach dust and reclaim purpose, the air that is purified; After the dust recovery at dust recycling can (10) top is vented to gathering-device (22), directly emptying.The dust slip that reclaims after dust recycling can (10) side agitator (12) stirring, is transported to the raw material pulverizing operation, is used for spice.
CN201210138498.9A 2012-04-26 2012-04-26 Dry cassava raw material screening device Active CN102688847B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103736583A (en) * 2014-01-15 2014-04-23 江苏韦欧机械有限公司 Grain degritting system and degritting method thereof
CN108515638A (en) * 2018-04-27 2018-09-11 夏敏月 A kind of technics of reclaim of plastic waste reuse method
CN108621337A (en) * 2018-04-27 2018-10-09 夏敏月 A kind of technics of reclaim of plastic waste reutilization system
CN110482103A (en) * 2019-09-07 2019-11-22 内蒙古蒙森农业科技股份有限公司 Potato with screening and conveying function is stockpiled and stored field
CN110694899A (en) * 2019-09-20 2020-01-17 苏州德君环卫服务有限公司 Inside material separation structure of clean maintenance device of town road
CN112113399A (en) * 2020-09-07 2020-12-22 安徽云龙粮机有限公司 Integrated grain conveying, screening and drying system
CN112221668A (en) * 2020-10-01 2021-01-15 刘兴娥 Sweet potato starch extraction element
CN114453212A (en) * 2022-02-28 2022-05-10 程元祥 Powder coating fine powder recovery equipment

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CN201832538U (en) * 2010-11-04 2011-05-18 中山粤海饲料有限公司 Deodorizing and dust-removing device of shrimp material production line
CN202130880U (en) * 2011-06-07 2012-02-01 杭州明云混凝土有限公司 Powder storing control system
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CN201140173Y (en) * 2007-09-08 2008-10-29 南宁邦克电力设备有限责任公司 Tapioca starch finished product screen
CN201791503U (en) * 2010-09-08 2011-04-13 邹平金刚新材料有限公司 Tandem power material homogenizing system
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Publication number Priority date Publication date Assignee Title
CN103736583A (en) * 2014-01-15 2014-04-23 江苏韦欧机械有限公司 Grain degritting system and degritting method thereof
CN103736583B (en) * 2014-01-15 2015-08-12 江苏韦欧机械有限公司 A kind of grain desanding system and the method with its desanding
CN108515638B (en) * 2018-04-27 2020-10-20 重庆市潼南区九橡化大环保科技有限公司 Waste plastic recycling method
CN108621337A (en) * 2018-04-27 2018-10-09 夏敏月 A kind of technics of reclaim of plastic waste reutilization system
CN108515638A (en) * 2018-04-27 2018-09-11 夏敏月 A kind of technics of reclaim of plastic waste reuse method
CN110482103A (en) * 2019-09-07 2019-11-22 内蒙古蒙森农业科技股份有限公司 Potato with screening and conveying function is stockpiled and stored field
CN110694899A (en) * 2019-09-20 2020-01-17 苏州德君环卫服务有限公司 Inside material separation structure of clean maintenance device of town road
CN110694899B (en) * 2019-09-20 2020-10-27 苏州科腾软件开发有限公司 Inside material separation structure of clean maintenance device of town road
CN112113399A (en) * 2020-09-07 2020-12-22 安徽云龙粮机有限公司 Integrated grain conveying, screening and drying system
CN112221668A (en) * 2020-10-01 2021-01-15 刘兴娥 Sweet potato starch extraction element
CN112221668B (en) * 2020-10-01 2021-12-14 张家界朝阳冲农产品开发有限责任公司 Sweet potato starch extraction element
CN114453212A (en) * 2022-02-28 2022-05-10 程元祥 Powder coating fine powder recovery equipment
CN114453212B (en) * 2022-02-28 2024-02-09 中涂唐彩(山东)涂料科技有限责任公司 Powder coating fine powder recovery device

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