CN108906377B - Spraying equipment of multi-level asymmetric ceramic membrane pipe - Google Patents
Spraying equipment of multi-level asymmetric ceramic membrane pipe Download PDFInfo
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- CN108906377B CN108906377B CN201811047806.0A CN201811047806A CN108906377B CN 108906377 B CN108906377 B CN 108906377B CN 201811047806 A CN201811047806 A CN 201811047806A CN 108906377 B CN108906377 B CN 108906377B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
- B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
- B05B12/1472—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet separate supply lines supplying different materials to separate outlets of the spraying apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
- B05B13/0228—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the movement of the objects being rotative
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0278—Arrangement or mounting of spray heads
Abstract
The invention provides spraying equipment for a multilayer asymmetric ceramic membrane tube, which mainly comprises an air compressor, a pressure stabilizing tank, a material liquid tank, a pneumatic membrane pump, an automatic guide rail, an automatic spray gun, a rotating motor, a positioning assembly, a material liquid recovery tank and a control unit. This device provides stable pressure for all pneumatic equipment through air compressor machine and surge tank. The parts realize feeding, die sleeving, spraying and lower die in spraying operation under the control of the control unit, a return pipeline is arranged at a feed inlet of the spray gun, the stability of feed liquid in the feed liquid tank is improved, and different spraying materials are switched by using a double-pipeline circuit. The spray gun is fixed on the automatic guide rail, and the gun moving speed, the distance between the nozzle and the ceramic support body and the autorotation speed of the support body can all realize programmed control. The invention has high automation degree, improves the production efficiency and reduces the labor intensity; the method can realize the one-step preparation of the multilayer asymmetric ceramic film layer, the thickness and the uniformity of the film layer are finely controlled, and the filtration flux of the high-temperature dust removal ceramic film is improved.
Description
Technical Field
The invention relates to spraying equipment for a multilayer asymmetric ceramic membrane tube, in particular to preparation of a ceramic membrane for high-temperature gas purification, and belongs to the field of automatic spraying equipment.
Background
The ceramic filter material has the outstanding characteristics of high temperature resistance, corrosion resistance, high mechanical strength, high chemical stability, long service life and the like, and is very suitable for serving as the filter material in harsh environment. The early ceramic membrane tube has a single-layer symmetrical structure, the filtration resistance is large, the membrane tube is easy to block, and the popularization and application of the high-temperature dust removal ceramic membrane technology are greatly promoted by adopting the ceramic membrane with an asymmetrical structure at present. The asymmetric ceramic membrane adopts porous ceramic with larger average pore diameter as a supporting material, and a separation membrane with smaller average pore diameter is coated on the supporting material. From the separation layer to the supporting layer, the pore diameter is changed from small to large, even if dust particles permeate through the separation film layer in the filtering process, the dust particles can smoothly pass through the supporting layer, the blockage of the asymmetric ceramic membrane is effectively prevented, the surface filtration is realized, and the service life of the asymmetric ceramic membrane is prolonged. When the asymmetric ceramic membrane is regenerated, the pore diameter is reduced from the supporting layer to the separating layer, which is beneficial to the cleaning and regeneration of the asymmetric ceramic membrane.
At present, the spraying of the asymmetric ceramic membrane is mostly finished by manual spraying, and the thickness and the uniformity of the ceramic membrane layer cannot be effectively controlled; or only the ceramic support body pipe is automatically sprayed with a single-layer separation membrane layer, and the membrane layer particles are easy to permeate into the support body; after the coating liquid with the same particle size is sprayed for a long time, particles are deposited and remained in the pipeline, and after the coating liquid with the other particle size is switched, the two are easy to interfere, so that a large amount of clear water is needed for cleaning before use, and water resources are wasted. Therefore, an automatic spraying device capable of switching and spraying two different feed liquids at any time is urgently needed, so that the multilayer asymmetric ceramic membrane tube can be prepared in one step.
CN106140532A discloses a full-automatic equipment suitable for pipeline spraying, drives the pipeline rotation through the rotating electrical machines, and the horizontal and longitudinal movement of spray gun is controlled to the accommodate motor, and the feed liquid flows into the spray gun through the feed liquid case through the action of gravity and realizes full-automatic spraying. However, if the material is fed by gravity action and is used for coating a ceramic filter membrane layer, particles in coating liquid are easy to settle, and the spraying equipment has fewer adjustable parameters and single function.
CN105182831A discloses a spraying control system, in which a rotating motor is used for realizing the rotation of a spraying device, a traveling motor is used for realizing the feeding of the spraying device, and the spraying parameters can be controlled by a frequency conversion device, but the spraying control system sprays a spraying piece by the rotating spraying device, the efficiency is low, and the system is not suitable for the spraying of a long tubular spraying piece.
CN104941852A discloses a steel pipe surface coating equipment, realizes the function of accurate mobile location through mobile positioning device, and the photocuring cooling device realizes the rapid hardening that sprays paint, can realize the function of many steel pipes accurate positioning spraying simultaneously. However, the photocuring cooling technique is an instant surface curing technique using strong ultraviolet rays, and is only suitable for offset printing of impermeable substrates.
In addition, the three automatic spraying devices and the spraying system are all spraying devices for impermeable base materials, and the stability of the spraying material liquid is good. In the ceramic membrane industry, particularly in the ceramic membrane filtration by high-temperature gas, the stability of the feed liquid is poor, and the sedimentation state of the feed liquid needs to be considered; meanwhile, the three automatic spraying devices and the spraying system cannot realize sustainable spraying of multilayer asymmetric coatings on the same ceramic support body pipe, so that the design of the automatic spraying device of the multilayer asymmetric ceramic film pipe specially applied to the ceramic film industry is very necessary.
Disclosure of Invention
The equipment of the invention designs double-spraying pipelines, wherein one pipeline is used for spraying the transition layer of the ceramic support body pipe, so as to prevent membrane layer particles from directly permeating into the support body during spraying, form pore channel blockage and reduce filtration flux; one pipeline is sprayed with a ceramic film layer on the transition layer, so as to improve the filtration precision and the interception efficiency, reduce the membrane pollution and realize the surface filtration.
The invention provides multi-level asymmetric ceramic membrane tube spraying equipment, which aims to design professional equipment aiming at a ceramic filtering membrane tube, shorten a process production line, improve the production efficiency and reduce the occupied area of the equipment, wherein two pipelines are connected in parallel and are respectively provided with a backflow pipeline so as to improve the stability of feed liquid in a feed liquid tank; and spray gun nozzles with different calibers are selected according to the components of the feed liquid, so that the spray gun nozzles are not influenced mutually, and meanwhile, the two spraying pipelines can be switched freely, so that the preparation of the multilayer asymmetric ceramic membrane tube is realized, and the working efficiency is improved.
The technical scheme of the invention is as follows:
a spraying device for a multilayer asymmetric ceramic membrane tube comprises an air compressor, a pressure stabilizing tank, an automatic guide rail, a rotating motor, a positioning assembly, a feed liquid recovery tank, a control unit, a pipeline line I and a pipeline line II; a spraying pipeline line I is formed by the feed liquid tank I, the pneumatic diaphragm pump I and the automatic spray gun I; a spraying pipeline circuit II is formed by the feed liquid tank II, the pneumatic diaphragm pump II and the automatic spray gun II; the air compressor and the pressure stabilizing tank provide stable pressure for all pneumatic equipment, and the control unit provides programmed control for all automatic components. The ceramic support body pipe is fixed through a rotating motor and a positioning assembly, and the autorotation speed of the support body is adjusted through a control unit; the coating of the intermediate layer is realized by the transition layer material liquid through a pipeline line I, the coating of the separation layer is realized by the separation layer material liquid through a pipeline line II, and the feed inlets of the spray guns are respectively provided with a backflow pipeline through the two lines, so that the stability of the material liquid in the material liquid tank is improved, and the material liquid can be freely switched by a control unit; the spray gun is fixed on the automatic guide rail, the gun moving speed of the spray gun and the distance between the nozzle and the ceramic support body tube can be controlled by the control unit.
Wherein:
the air compressor and the pressure stabilizing tank provide stable pressure in the range of 0.2MPa-0.8MPa according to the viscosity of the spraying coating liquid and the size of particles/fibers.
The rotating motor and the positioning component can fix the length range of the ceramic support body pipe to be 0.2m-2.0m, and the outer diameter range of the ceramic support body pipe to be 0.02m-0.2 m.
The rotating motor and the positioning assembly can realize the autorotation speed of 1-500r/min of the ceramic support body tube under the control of the control unit.
The pipeline I is a feed liquid spraying pipeline of a transition layer, the caliber of a spray gun nozzle is 1.2-2.0mm, and the average particle size/length range of particles/fibers in the feed liquid capable of being sprayed is 25-50 mu m.
The pipeline II is a separation layer material liquid spraying line, the caliber of a spray gun nozzle is 0.8-1.2mm, and the average particle diameter/length range of particles/fibers in the material liquid capable of being sprayed is 1-25 mu m.
Pipeline circuit I and pipeline circuit II are equallyd divide at the spray gun feed inlet and are equipped with the backflow pipeline respectively, and the reflux ratio is 1: 1-20: 1.
the automatic guide rail can realize the gun moving speed of the spray gun to be 1-50m/min under the control of the control unit.
The automatic guide rail can realize the spraying distance between the nozzle and the ceramic support body to be 0.05-0.5m under the control of the control unit.
The invention has the beneficial effects that:
1) the invention realizes the full-automatic spraying of the permeable substrate ceramic support body tube, realizes the integrated spraying of the middle transition layer and the filtering membrane layer of the ceramic membrane tube by mainly utilizing a double-pipeline line, shortens the process production line, reduces the floor area of equipment, and can freely switch two pipelines which are mutually connected in parallel, thereby realizing the preparation of the multilayer asymmetric ceramic membrane tube.
2) And the feed inlets of the spray guns are respectively provided with a backflow pipeline, so that the stability of feed liquid in the feed liquid tank is improved, the stability of spraying the coating liquid with large particle size is realized, and the probability of blockage of the spray guns is reduced.
Drawings
Fig. 1 is a diagram of a multilayer asymmetric ceramic film tube spraying device, wherein: 1-an air compressor; 2-a pressure stabilizing tank; 3-a feed liquid tank I; 4-a feed liquid tank II; 5-pneumatic diaphragm pump I; 6-pneumatic diaphragm pump II; 7-automatic guide rail; 8-automatic spray gun I; 9-automatic spray gun II; 10-a rotating electrical machine; 11-a positioning assembly; 12-a feed liquid recovery tank; 13-a control unit.
Detailed Description
The present invention will be further explained with reference to examples. The following examples are provided only for illustrating the present invention and are not intended to limit the scope of the present invention.
The utility model provides a spraying equipment of multilayer asymmetric ceramic membrane pipe, includes air compressor machine 1, surge tank 2, material fluid reservoir I3, material fluid reservoir II 4, pneumatic diaphragm pump I5, pneumatic diaphragm pump II 6, automatic guide rail 7, automatic spray gun I8, automatic spray gun II 9, rotating electrical machines 10, locating component 11, feed liquid recovery pond 12 and the control unit 13. Wherein the air compressor 1 and the surge tank 2 provide stable pressure for all pneumatic equipment, and the control unit 13 provides programmed control for all automatic components. The rotary motor 10 and the positioning component 11 fix the spraying ceramic support body pipe. The automatic spray gun I8 and the automatic spray gun II 9 are fixed on the automatic guide rail 7. A spraying pipeline circuit I is formed by a feed liquid tank I3, a pneumatic diaphragm pump I5 and an automatic spray gun I8; and a material liquid tank II 4, a pneumatic diaphragm pump II 6 and an automatic spray gun II 9 form a spraying pipeline circuit II, and the two spraying pipeline circuits are respectively provided with a backflow pipeline to the material liquid tank at a spray gun feed inlet.
The air compressor 1 and the pressure stabilizing tank 2 provide a stable pressure range of 0.2MPa-0.8MPa according to the viscosity of the spraying coating liquid and the size of particles/fibers. The rotating motor 10 and the positioning component 11 can fix the length range of the ceramic support body pipe to be 0.2m-2.0m, and the outer diameter range of the ceramic support body pipe to be 0.02m-0.2 m. The rotating motor 10 and the positioning assembly 11 can realize the autorotation speed of the ceramic support tube of 1-500r/min under the control of the control unit 13. The pipeline line I is a feed liquid spraying line of a transition layer, the caliber of a nozzle of the automatic spray gun I8 is 1.2-2.0mm, and the average particle size/length range of particles/fibers in the feed liquid capable of being sprayed is 25-50 mu m. The pipeline line II is a separating layer material liquid spraying line, the caliber of a nozzle of the automatic spray gun II 9 is 0.8-1.2mm, and the average particle size/length range of particles/fibers in the material liquid capable of being sprayed is 1-25 mu m. Pipeline circuit I and pipeline circuit II are equipped with backflow pipeline respectively at the spray gun feed inlet, and the reflux ratio is 1: 1 to 20: 1. the automatic guide rail 7 can realize the gun moving speed of the spray gun to be 1-50m/min and adjust the spraying distance between the spray nozzle and the ceramic support body pipe to be 0.05-0.5m under the control of the control unit 13.
The spraying equipment for the multilayer asymmetric ceramic membrane tube has the working process as follows: and starting the air compressor 1 and the surge tank 2 to provide stable pressure for all pneumatic equipment. The ceramic support body tube is fixed through the positioning component 11, and the rotating motor 10 is controlled to drive the ceramic support body tube to axially rotate at a constant speed at a certain rotating speed. A feed liquid tank I3 in the pipeline line I stores transition layer feed liquid, a pneumatic diaphragm pump I5 provides stable transition layer feed liquid supply for an automatic spray gun I8, and an automatic guide rail 7 drives the automatic spray gun I8 to spray the transition layer feed liquid; and after the spraying of the transition layer material liquid is finished, switching to a pipeline circuit II, storing the separation layer material liquid in a material liquid tank II 4, providing stable separation layer material liquid supply for an automatic spray gun II 9 by using a pneumatic diaphragm pump II 6, and driving the automatic spray gun II 9 to spray the transition layer material liquid by using an automatic guide rail 7. Wherein, the two pipeline lines are respectively provided with a return pipeline to the feed liquid tank to maintain the stability of the feed liquid in the feed liquid tank. And finally, taking down the ceramic support body tube after spraying and drying. The control unit 13 sets parameters for all the above automatic components, providing programmed control.
Example 1
Ceramic support body pipe length that this embodiment used is 0.2m, the external diameter is 0.1 m, the steady pressure that air compressor machine 1 and surge tank 2 provided is at 0.2MPa, ceramic support body pipe rotation rotational speed 1 r/min, pipeline circuit I is transition layer feed liquid spraying circuit, wherein I nozzle bore of automatic spray gun is 1.2mm, pipeline circuit II is separation layer feed liquid spraying circuit, wherein II nozzle bores of automatic spray gun are 0.8 mm, pipeline circuit I and pipeline circuit II are equipped with backflow pipeline respectively at the spray gun feed inlet, the reflux ratio is 1: 1. the automatic guide rail 7 drives the spray gun to move at the speed of 1m/min, and the spraying distance between the nozzle and the ceramic support body pipe is 0.05 m.
Example 2
Ceramic support body pipe length that this embodiment used is 1m, the external diameter is 0.02m, the steady pressure that air compressor machine 1 and surge tank 2 provided is at 0.4 MPa, ceramic support body pipe rotation rotational speed 250 r/min, pipeline circuit I is transition layer feed liquid spraying circuit, wherein I nozzle bore of automatic spray gun is 1.4 mm, pipeline circuit II is separation layer feed liquid spraying circuit, wherein II nozzle bores of automatic spray gun are 1.0 mm, pipeline circuit I and pipeline circuit II are equipped with backflow pipeline respectively at the spray gun feed inlet, the reflux ratio is 10: 1. the automatic guide rail 7 drives the spray gun to move at a speed of 25 m/min, and the spraying distance between the nozzle and the ceramic support body pipe is 0.25 m.
Example 3
Ceramic support body pipe length that this embodiment used is 2m, the external diameter is 0.2m, the steady pressure that air compressor machine 1 and surge tank 2 provided is at 0.8MPa, ceramic support body pipe rotation rotational speed 500r/min, pipeline circuit I is transition layer feed liquid spraying circuit, wherein I nozzle bore of automatic spray gun is 2.0mm, pipeline circuit II is separation layer feed liquid spraying circuit, wherein II nozzle bores of automatic spray gun are 1.2mm, pipeline circuit I and pipeline circuit II are equipped with backflow pipeline respectively at the spray gun feed inlet, the reflux ratio is 20: 1. the automatic guide rail 7 drives the spray gun to move at a speed of 50m/min, and the spraying distance between the nozzle and the ceramic support body pipe is 0.5 m.
Claims (5)
1. A spraying device for a multilayer asymmetric ceramic membrane tube is characterized by comprising an air compressor, a pressure stabilizing tank, an automatic guide rail, a rotating motor, a positioning component, a feed liquid recovery tank, a control unit, a pipeline line I and a pipeline line II; a spraying pipeline line I is formed by the feed liquid tank I, the pneumatic diaphragm pump I and the automatic spray gun I; a spraying pipeline circuit II is formed by the feed liquid tank II, the pneumatic diaphragm pump II and the automatic spray gun II; the air compressor and the pressure stabilizing tank provide stable pressure for all pneumatic equipment, and the control unit provides programmed control for all automatic components; the ceramic support body pipe is fixed through a rotating motor and a positioning assembly, and the autorotation speed of the support body is adjusted through a control unit; the intermediate layer is coated by the transition layer material liquid through a pipeline line I, the separation layer is coated by the separation layer material liquid through a pipeline line II, and the two pipeline lines can be freely switched through a control unit; the automatic spray gun is fixed on the automatic guide rail, the gun moving speed of the automatic spray gun and the distance between the nozzle and the ceramic support body tube can be controlled by the control unit;
the pipeline line I is a transition layer material liquid spraying line, the caliber of a spray gun nozzle is 1.2-2.0mm, and the average particle size/length range of particles/fibers in the material liquid capable of being sprayed is 25-50 mu m;
the pipeline line II is a separating layer material liquid spraying line, the caliber of a nozzle of the automatic spray gun is 0.8-1.2mm, and the average particle size/length range of particles/fibers in the material liquid capable of being sprayed is 1-25 mu m;
the automatic guide rail realizes the gun moving speed of the automatic spray gun to be 1-50m/min under the control of the control unit; the automatic guide rail can realize the spraying distance between the nozzle and the ceramic support body to be 0.05-0.5m under the control of the control unit.
2. The spraying apparatus of a multi-layered asymmetric ceramic membrane tube as claimed in claim 1, wherein the air compressor and the pressure-stabilizing tank provide a stable pressure ranging from 0.2MPa to 0.8MPa according to the viscosity of the spraying liquid and the size of the particles/fibers.
3. The apparatus for spray-coating a multi-layered asymmetric ceramic membrane tube as claimed in claim 1, wherein the rotating motor and the positioning member fix the ceramic support body tube in a range of 0.2m to 2.0m in length and in a range of 0.02m to 0.2m in outer diameter.
4. The spraying equipment for the multilayer asymmetric ceramic membrane tube as claimed in claim 1, wherein the rotation speed of the ceramic support tube can be 1-500r/min by the rotation motor and the positioning component under the control of the control unit.
5. The spraying equipment of the multilayer asymmetric ceramic membrane tube as claimed in claim 1, wherein the pipeline line I and the pipeline line II are respectively provided with a backflow pipeline at the feeding port of the automatic spray gun, and the backflow ratio is 1: 1-20: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811047806.0A CN108906377B (en) | 2018-09-10 | 2018-09-10 | Spraying equipment of multi-level asymmetric ceramic membrane pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811047806.0A CN108906377B (en) | 2018-09-10 | 2018-09-10 | Spraying equipment of multi-level asymmetric ceramic membrane pipe |
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| CN108906377A CN108906377A (en) | 2018-11-30 |
| CN108906377B true CN108906377B (en) | 2020-09-08 |
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| CN110274803A (en) * | 2019-05-30 | 2019-09-24 | 中国科学院金属研究所 | Can accuracy controlling nanometer grade thickness forming thin film thickness and area film-forming method |
| CN110368820B (en) * | 2019-08-11 | 2021-10-19 | 景德镇陶瓷大学 | Spraying, slurry pouring and film coating device and preparation method of flat plate type ceramic ultrafiltration membrane |
| CN112264231B (en) * | 2020-09-28 | 2022-03-08 | 清华大学盐城环境工程技术研发中心 | Surface coating device for pipe fitting |
| CN113555162B (en) * | 2021-07-13 | 2022-07-22 | 郑州大学 | Preparation method of highly-oriented one-dimensional conductive filler-based TCF (thermal conductive film) material |
| CN115872761B (en) * | 2022-11-15 | 2023-08-29 | 湖南仁龙新材料有限公司 | Preparation method of silicon carbide smoke ceramic filter membrane |
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| CN103277982B (en) * | 2013-05-21 | 2015-06-17 | 南京九思高科技有限公司 | Technology and device for circulating recycling of volatile organic compound in coating printing industry |
| CN104889038A (en) * | 2014-03-05 | 2015-09-09 | 孝感天茂铝业有限公司 | Co-curing double-spraying production method and device thereof |
| CN107552297A (en) * | 2016-06-30 | 2018-01-09 | 天津雅彩科技有限公司 | A kind of paint spray booth |
| CN108311325A (en) * | 2018-04-10 | 2018-07-24 | 镇江环太硅科技有限公司 | It is a kind of to spray for liquid circulating device and its circulating feeding liquid method |
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