CN214148743U - Multistage natural wind waterfall type fine sand drying device - Google Patents
Multistage natural wind waterfall type fine sand drying device Download PDFInfo
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- CN214148743U CN214148743U CN202022811006.0U CN202022811006U CN214148743U CN 214148743 U CN214148743 U CN 214148743U CN 202022811006 U CN202022811006 U CN 202022811006U CN 214148743 U CN214148743 U CN 214148743U
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- 239000004576 sand Substances 0.000 title claims abstract description 93
- 238000001035 drying Methods 0.000 title claims abstract description 49
- 239000000463 material Substances 0.000 claims abstract description 82
- 238000007605 air drying Methods 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000007791 dehumidification Methods 0.000 claims abstract description 12
- 239000000428 dust Substances 0.000 claims description 14
- 230000006698 induction Effects 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 8
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 7
- 239000004744 fabric Substances 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
本实用新型公开了一种多级自然风瀑式细砂干燥装置，包括依次连接的水平风力隧道除湿系统、跌落式坡槽砂瀑风干系统、垂直砂瀑干燥系统，本装置采用蒸发原理，通过空气流动，即可将物料表面水分汽化风干，达到快速干燥效果，适用性强，能耗低，纯物理变化，无需新增热源能耗；本装置改变了传统的湿砂烘干机械所采用的水平翻转松散方式，利用大倾角坡槽，使物料靠自身重量在一定角度的坡槽内自上而下滚动翻转，较水平翻转方式效率更高，松散效果更好，空气流动性更佳，本装置采用三级落瀑式布料，使得砂料可全方位受风风干，垂直分段送风排风，有效隔离不同湿度的空气，减少湿空气混合影响砂料干燥程度。
The utility model discloses a multi-stage natural wind waterfall type fine sand drying device, which comprises a horizontal wind tunnel dehumidification system, a falling slope groove sand waterfall air drying system and a vertical sand waterfall drying system which are connected in sequence. Air flow can vaporize and air dry the water on the surface of the material to achieve rapid drying effect, strong applicability, low energy consumption, pure physical change, no need to add heat source energy consumption; this device changes the traditional wet sand drying machine. The horizontal overturning loosening method uses a large inclination angle groove to make the material roll and turn from top to bottom in a certain angle groove by its own weight. Compared with the horizontal turning method, the efficiency is higher, the loosening effect is better, and the air flow is better. The device adopts a three-stage waterfall type cloth, so that the sand can be air-dried in all directions, and the air is supplied and exhausted vertically in sections, which can effectively isolate the air of different humidity, and reduce the mixing of wet air to affect the drying degree of the sand.
Description
Technical Field
The utility model relates to a fine sand drying equipment field, concretely relates to multistage natural wind waterfall formula fine sand drying device.
Background
After the fine sand is washed by water and dehydrated, the water content of the fine sand is about 8-12%, and the requirements of JG/T291-2011 on fine aggregates are as follows: the method meets the regulation of II-type medium sand in GB/T14684, and the water content is less than 0.5 percent. In order to reduce the drying cost of the sand material of the ready-mixed mortar, the moisture content of the sand material provided by a sand and stone enterprise is required to be no more than 1% by the ready-mixed mortar enterprise, and the sand and stone enterprise selects a washing process for meeting the control of the content of the stone powder required by the ready-mixed mortar enterprise, so that the sand and stone enterprise needs to dry the washed fine sand and then can deliver the goods.
The existing sand material drying machine mostly adopts an external heat source drum type drying machine, has larger processing capacity and can realize large-scale production, but because the sand material drying machine needs a heat source, the energy consumption is larger no matter the sand material drying machine adopts electric energy heating or gas heating, meanwhile, because part of the sand material is baked at medium temperature in the heating process, dust pollution is easy to generate, a matched special dust removing device is needed to collect the raised dust in the processing process, and the matched dust removing device also needs to consume certain energy consumption; in order to reduce energy consumption and realize green drying of sand materials, normal-temperature air drying is selected to become a preferred process, but because the water content of the sand materials is high and is of a bulk structure, normal-temperature air supply air drying hardly achieves the expected effect, if a horizontal natural air drying mode is adopted, the occupied area of a facility is large, the facility needs to be repeatedly scattered, the energy consumption is high, and the air drying effect is poor.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a technical scheme does: a multi-stage natural wind waterfall type fine sand drying device comprises a horizontal wind tunnel dehumidification system, a drop-off type slope trough sand waterfall air drying system and a vertical sand waterfall drying system which are sequentially connected;
the horizontal wind tunnel dehumidification system comprises a wind tunnel box body, a material feeding bin, a feeder, a three-layer conveying belt assembly, a material collecting bin, a first air supply system and a first air induction system, wherein the material feeding bin is arranged at the top of one end, far away from the falling type slope groove sand waterfall air drying system, of the wind tunnel box body, extends into the wind tunnel box body and is connected with the feeder corresponding to one end of the three-layer conveying belt assembly;
the falling type slope trough sand waterfall air drying system comprises a material conveying belt, a collecting hopper, a distributing device, a louvered slope trough assembly, a vibrator, an air supply system II and an air induction system II, wherein the material conveying belt and the louvered slope trough assembly are obliquely arranged and connected into a splayed shape, the lowest end of the material conveying belt corresponds to a material collecting bin, the highest end of the material conveying belt extends into the highest end of the louvered slope trough assembly and is connected with the distributing device, the lowest end of the louvered slope trough assembly corresponds to the inlet end of a vertical sand waterfall drying system, the vibrator is arranged on the louvered slope trough assembly, the air supply system II is arranged at the lower part of the louvered slope trough assembly, and the air induction system II is arranged at the top of the louvered slope trough assembly;
perpendicular sand waterfall drying system includes screw feeder, sealed distributing device, vertical air-dry case, drier charge collector, gives three, exhaust system, the wind-force swirler of air-supply system, screw feeder sets up for the slope, and its lower extreme corresponds with tripe formula slope groove subassembly export, and the highest end is through sealed distributing device, drier charge collector and vertical air-dry roof portion intercommunication, give three and vertical air-dry case intercommunications of air-supply system, vertical air-dry roof portion is passed through exhaust system and is connected with wind-force swirler, the wind-force swirler bottom is connected with the dust pocket, the wind-force swirler top is connected with the sack cleaner and is carried out gaseous outer row.
As the improvement, three-layer conveyer belt subassembly includes upper conveyer belt, middle level conveyer belt, bottom conveyer belt, and adjacent conveyer belt is independent and reverse setting, the bottom conveyer belt sets up for the slope, and its one end that stretches into material aggregate storehouse is higher end.
As an improvement, the bottom of the wind tunnel box body is provided with a slope bottom surface, one end of the slope bottom surface, which is close to the drop-type slope groove sand waterfall air-drying system, is a highest end, the other end of the slope bottom surface is a lowest end, and the lowest end of the slope bottom surface is provided with a deep water seal type floor drain and drain pipe for draining water outwards.
As the improvement, wind-force tunnel box lateral wall bottom evenly is equipped with the rectangular shape air intake of several along its length direction, the system of sending wind is unified including for fan one, for tuber pipe one, for fan one through for tuber pipe one with rectangular shape air intake connection evenly carry wind-force to the wind-force tunnel box in, wind-force tunnel box top evenly is equipped with the horizontal induced air mouth of several, the horizontal induced air mouth passes through the induced air pipe and is connected with draught fan one, the blast pipe is connected to a draught fan other end.
As an improvement, the louver type slope groove component comprises a louver type slope groove and a slope groove closed cover arranged outside the louver type slope groove, the highest end of the material conveying belt extends into the slope groove closed cover, and a louver air supply opening corresponding to the air supply system II is arranged at the bottom of the slope groove closed cover.
As an improvement, the air supply system II comprises a second air supply machine and a second air supply pipe, the second air supply machine is connected with a louver air supply opening at the bottom of the slope groove sealing cover through the second air supply pipe, an air outlet is arranged at the top of the slope groove sealing cover, and an air outlet channel exhaust pipe is connected with a second induced draft fan.
As an improvement, the number of the louver air supply outlets is multiple, and the louver air supply outlets are uniformly arranged along the bottom of the slope groove sealing cover at intervals.
As an improvement, the number of the drop-out type slope trough sand waterfall air-drying systems is multiple, and the drop-out type slope trough sand waterfall air-drying systems are sequentially arranged in an end-to-end mode.
As the improvement, vertical air-dry box is equipped with three-layer air-dry box from top to bottom, every layer of air-dry box all is equipped with the supply-air outlet that corresponds with three of air supply system, three of air supply system include forced draught blower three, give tuber pipe three, forced draught blower three is connected with the supply-air outlet of air-dry box through giving tuber pipe three, every layer of air-dry roof portion all is equipped with induced duct two, induced duct two is discharged into wind swirler through induced draught fan three.
As an improvement, a cone nozzle is arranged at the joint of the bottom of the wind power cyclone and the dust removal bag.
After the structure more than adopting, the utility model has the advantages of as follows: the device adopts the evaporation principle, can evaporate and air-dry the moisture on the surface of the material through air flow, achieves the effect of quick drying, and has strong applicability, low energy consumption, pure physical change and no need of new heat source and energy consumption; the device changes the horizontal overturning loosening mode adopted by the traditional wet sand drying machine, and utilizes the slope groove with a large inclination angle to ensure that the material rolls and overturns from top to bottom in the slope groove with a certain angle by the self weight, so that the device has higher efficiency, better loosening effect and better air fluidity compared with the horizontal overturning mode; the device innovatively uses a louvered slope groove flat-bottom air supply outlet, and materials are conveyed and air-dried integrally; the slope grooves of the device are all groove low flat plates with louver structures, the movement of materials is not hindered, the turnover frequency of the materials is increased by the aid of a fluctuating bottom plate structure, the materials can be blown away by air supplied from the bottom of the plate, stable falling speed of sand materials is kept, the materials can be uniformly ventilated in all directions in the whole process, evaporation of water is accelerated, and rapid drying is realized; this device adopts tertiary waterfall formula cloth that falls for the sand material can all-round be exposed to the wind and air-dry, and the perpendicular segmentation air supply is aired exhaust, effectively keeps apart the air of different humidity, reduces the wet air and mixes the dry degree of influence sand material.
Drawings
Fig. 1 is a schematic structural view of a multistage natural wind waterfall type fine sand drying device of the present invention.
Fig. 2 is a schematic structural view of a horizontal wind tunnel dehumidification system in a multistage natural wind waterfall type fine sand drying device.
Fig. 3 is a schematic structural diagram of a drop-out slope groove sand waterfall air-drying system in the multistage natural wind waterfall type fine sand drying device.
Fig. 4 is a schematic structural view of a louver-type slope trough in the multi-stage natural wind waterfall type fine sand drying device of the present invention.
Fig. 5 is a schematic structural view of a vertical sand waterfall drying system in a multistage natural wind waterfall type fine sand drying device of the present invention.
As shown in the figure: 1. a horizontal wind tunnel dehumidification system comprises a horizontal wind tunnel dehumidification system 1.1, a wind tunnel box body 1.1a, a slope bottom surface 1.2, a material feeding bin 1.3, a feeder 1.4, a three-layer conveyor belt assembly, a first upper-layer conveyor belt, a first middle-layer conveyor belt, a first bottom-layer conveyor belt, a first material collecting bin 1.5, a first induced draft system 1.6, a first induced draft pipe 1.6a, an induced draft pipe 1.6b, a first induced draft fan, a first 1.6c, an exhaust pipe 1.7, a deep water-sealed floor drain pipe 1.8, a long strip-shaped air inlet, a second falling slope trough sand waterfall air drying system 2.1, a material conveyor belt 2.2, a material collecting bin 2.3, a distributor 2.4, a louver type slope trough assembly 2.4a, a louver type slope trough, a 2.4b, a slope trough closed cover, a second air supply system 2.5a, a second air feeder 2.5b, a second air supply pipe, a 2.6, a second induced draft pipe, a vertical sand drying system, a waterfall, a feeder 3.3, a feeder 3, a feeder 3.5, 3.3, a vertical air drying box, 3.4, a dry material collector, 3.5, a third air supply system, 3.5a, a third fan, 3.5b, a third air supply pipe, 3.6, an air exhaust system, 3.6a, a second induced air pipe, 3.6b, a third induced draft fan, 3.7, a wind power cyclone, 3.8, a dust removal bag, 3.9 and a bag-type dust remover.
Detailed Description
Combine the attached drawing, a multistage natural wind waterfall formula fine sand drying device, its characterized in that: the system comprises a horizontal wind tunnel dehumidification system 1, a drop-off type slope trough sand waterfall air-drying system 2 and a vertical sand waterfall drying system 3 which are connected in sequence;
the horizontal wind tunnel dehumidification system 1 comprises a wind tunnel box body 1.1, a material feeding bin 1.2, a feeder 1.3, a three-layer conveying belt assembly 1.4, a material collecting bin 1.5, a wind supply system and an induced air system I1.6, wherein the material feeding bin 1.2 is arranged at the top of one end, away from the falling type slope groove sand waterfall air-drying system 2, of the wind tunnel box body 1.1 and extends into the wind tunnel box body 1.1 and is connected with the feeder 1.3 corresponding to one end of the three-layer conveying belt assembly 1.4, the other end of the three-layer conveying belt assembly 1.4 extends out of the wind tunnel box body 1.1 and extends into the material collecting bin 1.5, an outlet at the bottom of the material collecting bin 1.5 corresponds to an inlet end of the falling type slope groove sand waterfall air-drying system 2, the wind supply system I is arranged at the bottom of the wind tunnel box body 1.1, and the induced air system I1.6 is arranged at the top of the wind tunnel box body 1.1.1;
the falling type slope trough sand waterfall air drying system 2 comprises a material conveying belt 2.1, a collecting hopper 2.2, a distributing device 2.3, a louvered slope trough component 2.4, a vibrator, an air supply system II 2.5 and an induced air system II 2.6, wherein the material conveying belt 2.1 and the louvered slope trough component 2.4 are obliquely arranged and connected into a splayed shape, the lowest end of the material conveying belt 2.1 corresponds to the material collecting bin 1.5, the highest end of the material conveying belt extends into the highest end of the louvered slope trough component 2.4 and is connected with the distributing device 2.2, the lowest end of the louvered slope trough component 2.4 corresponds to the inlet end of the vertical sand waterfall drying system 3, the vibrator is arranged on the louvered slope trough component 2.4, the air supply system II 2.5 is arranged at the lower part of the louvered slope trough component 2.4, and the induced air system II 2.6 is arranged at the top of the louvered slope trough component 2.4;
vertical sand waterfall drying system 3 includes screw feeder 3.1, sealed cloth glassware 3.2, vertical air-drying box 3.3, drier loading head 3.4, and air supply system three 3.5, exhaust system 3.6, wind swirler 3.7, screw feeder 3.1 sets up for the slope, and its lower extreme corresponds with tripe formula chute subassembly 2.4 export, and the highest extreme passes through sealed cloth ware 3.2, drier loading head 3.4 and vertical air-drying box 3.3 top intercommunication, air supply system three 3.5 and vertical air-drying box 3.3 intercommunication, vertical air-drying box 3.3 top is connected with wind swirler 3.7 through exhaust system 3.6, wind swirler 3.7 bottom is connected with dust bag 3.8, wind swirler 3.7 top is connected with sack cleaner 3.9 and is carried out gas outward.
As a preferred embodiment of this embodiment, the three-layer conveyer belt assembly 1.4 includes an upper conveyer belt 1.4a, a middle conveyer belt 1.4b, and a bottom conveyer belt 1.4c, the adjacent conveyer belts are independently and reversely arranged, the bottom conveyer belt 1.4c is obliquely arranged, and one end of the bottom conveyer belt extending into the material collecting bin 1.5 is a higher end.
As a preferred embodiment of this embodiment, a slope bottom surface 1.1a is arranged at the bottom of the wind tunnel box body 1.1, one end of the slope bottom surface 1.1a close to the drop-off type slope trough sand waterfall air-drying system 2 is a highest end, the other end is a lowest end, and a deep water seal type floor drain pipe 1.7 is arranged at the lowest end of the slope bottom surface for draining water outwards.
As this embodiment preferred embodiment be, wind-force tunnel box 1.1 lateral wall bottom evenly is equipped with the rectangular shape air intake 1.8 of several along its length direction, the system of sending wind is unified including for fan one, give tuber pipe one, give fan one through for tuber pipe one with rectangular shape air intake 1.8 be connected evenly carry wind-force to wind-force tunnel box 1.1 in, wind-force tunnel box 1.1 top evenly is equipped with the horizontal induced air mouth of several, the horizontal induced air mouth is connected with draught fan one 1.6b through induced duct 1.6a, blast pipe 1.6c is connected to the draught fan one 1.6b other end.
As a preferred embodiment of this embodiment, the louvered slope trough assembly 2.4 includes a louvered slope trough 2.4a and a slope trough enclosure 2.4b disposed outside the louvered slope trough 2.4a, the highest end of the material conveying belt 2.1 extends into the slope trough enclosure 2.4b, and the bottom of the slope trough enclosure 2.4b is provided with a louvered air supply opening corresponding to the second air supply system 2.5.
As a preferred embodiment of this embodiment, the second air supply system 2.5 includes a second air supply blower 2.5a and a second air supply pipe 2.5b, the second air supply blower 2.5a is connected to the louver air supply opening at the bottom of the slope groove sealing cover 2.4b through the second air supply pipe 2.5b, the top of the slope groove sealing cover 2.4b is provided with an air outlet, and the air outlet channel air outlet pipe is connected to the second induced draft fan.
As the preferred embodiment of the embodiment, the number of the louver air supply openings is multiple, and the louver air supply openings are uniformly arranged along the bottom of the slope groove closing cover 2.4b at intervals.
As a preferred embodiment of this embodiment, the number of the drop-off type slope trough sand waterfall air-drying systems 2 is multiple, and the drop-off type slope trough sand waterfall air-drying systems are arranged end to end in sequence.
What is the preferred embodiment of this embodiment is, vertical air-drying box 3.3 is equipped with three-layer air-drying box from top to bottom, every layer of air-drying box all is equipped with the supply-air outlet that corresponds with three 3.5 of air supply system, three 3.5 of air supply system include three 3.5a of forced draught blower, give three 3.5b of tuber pipe, three 3.5a of forced draught blower are connected with the supply-air outlet of air-drying box through three 3.5b of tuber pipe, and every layer of air-drying box top all is equipped with induced duct two 3.6a, induced duct two 3.6a discharges into wind-force swirler 3.7 through three 3.6b of draught fan.
As a preferred embodiment of this embodiment, a cone nozzle is arranged at the connection position of the bottom of the wind power cyclone 3.7 and the dust removal bag 3.8.
The device utilizes normal-temperature air flow to quickly evaporate moisture on the surface of the returned and turned wet sand so as to dry the sand material; the device does not relate to heat energy, quickly vaporizes moisture on the surface of the wet sand only by air flow, belongs to physical change, and does not generate a new pollution source.
Wind tunnel box is rectangle enclosed construction among horizontal wind tunnel dehumidification system, and the aspect ratio is 4: 1, the gradient bottom surface of the bottom of the tunnel is provided with a gradient 1: the slope of 2.5 percent is used for collecting material open water, a deep water seal type floor drain pipe is used for draining water outwards at the lowest position in the tunnel, a material collecting bin is arranged on a bottom layer conveying belt, a feeder is arranged below the bottom layer conveying belt, and a fully-closed space is formed by storing sand in the material feeding bin and the material collecting bin; the bottom of the side wall of one side of the wind tunnel box body is longitudinally and uniformly provided with a long-strip-shaped air inlet, a first air supply system is connected with the long-strip-shaped air inlet through an air pipe to uniformly convey wind power into the wind tunnel box body, horizontal air induction ports are arranged at the top of the wind tunnel box body and are connected with an air induction pipe to be converged to a first induced fan, and the other end of the first induced fan is connected with an exhaust pipe to synchronously start the first induced fan and the induced fan, so that the wind power can rapidly and uniformly flow, and the primary dehumidifying work is completed;
the material conveying belt in the drop-type slope groove sand waterfall air-drying system conveys the primarily dehumidified material to a high-position collecting hopper, then the material is uniformly distributed into a fully-closed louver type slope groove assembly with a large inclination angle by a distributing device, the material rolls from top to bottom along the louver type slope groove by means of the gravity of the material, a vibrator is arranged on the louver type slope groove, and the material rolling speed is controlled by adjusting the vibration frequency and the vibration amplitude; the air supply system II is connected with a louver air supply opening at the bottom of the slope trough through a plurality of air supply pipes II, so that air is uniformly supplied through the louver openings, and materials sliding and rolling on the air supply system are dried, a plurality of air exhaust openings are formed in the top of a slope trough closed cover and are connected and conveyed to the induced draft fan through the air exhaust pipes, the induced draft fan works and accelerates to uniformly discharge wet air of the materials to the air exhaust pipes through the air exhaust pipes, and a drop-type sand waterfall drying process is completed, and because normal-temperature air drying is adopted, the sand materials are difficult to achieve a dehumidification effect through a slope trough sand waterfall, the process needs to be repeated for many times, namely 3-5 drop-type slope trough sand waterfalls are adopted to enable the materials to achieve a drying effect of which the water content is less than or equal to 2%;
after materials in the vertical sand waterfall drying system are dried by the falling type slope groove sand waterfall air drying system to meet the specified requirements, the materials enter a screw feeder and are conveyed to a high-position sealing distributing device in a sealing state, semi-dry materials are sprayed into a vertical air drying box in a waterfall shape, the vertical air drying box blows air in three layers, wet air of the sand materials dried by the three layers of air drying boxes is discharged into a unified air pipe to a wind power cyclone by a top draught fan III, a lower cone nozzle of the wind power cyclone is connected with a dust removal bag, and a top exhaust pipe of the wind power cyclone is discharged outside after passing through a bag-type dust remover.
The sand material through the air drying system requires that the water content is lower than 1%, if the water content requirement is not met, the feeding amount of the wet sand needs to be adjusted, the angle of the falling type slope groove sand fall slope groove is adjusted, the vibration frequency amplitude of the vibration device is reduced, the ventilation time of the material is prolonged, the air supply amount and the air induction amount of the vertical air drying box are adjusted, and the water content of the material is guaranteed to reach the standard.
The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022811006.0U CN214148743U (en) | 2020-11-28 | 2020-11-28 | Multistage natural wind waterfall type fine sand drying device |
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| CN202022811006.0U CN214148743U (en) | 2020-11-28 | 2020-11-28 | Multistage natural wind waterfall type fine sand drying device |
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| CN214148743U true CN214148743U (en) | 2021-09-07 |
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| CN202022811006.0U Withdrawn - After Issue CN214148743U (en) | 2020-11-28 | 2020-11-28 | Multistage natural wind waterfall type fine sand drying device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361792A (en) * | 2020-11-28 | 2021-02-12 | 河北惠丰生态环境有限公司 | Multistage natural wind waterfall type fine sand drying device |
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2020
- 2020-11-28 CN CN202022811006.0U patent/CN214148743U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361792A (en) * | 2020-11-28 | 2021-02-12 | 河北惠丰生态环境有限公司 | Multistage natural wind waterfall type fine sand drying device |
| CN112361792B (en) * | 2020-11-28 | 2025-01-24 | 河北惠丰生态环境有限公司 | A multi-stage natural wind waterfall type fine sand drying device |
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Granted publication date: 20210907 Effective date of abandoning: 20250124 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20210907 Effective date of abandoning: 20250124 |