A device for conveying powder in the chemical industry and a method of using the same

Abstract

The application discloses a device for conveying powder in a chemical industry and a use method thereof, and belongs to the field of conveying devices.The device comprises a dust removal bin, a hopper is arranged at the bottom of the dust removal bin, the hopper is connected to a stirring tank through a discharging pipeline at the bottom, a fan and a feeding pipeline are arranged on the dust removal bin, and a gravity detection structure is arranged below the dust removal bin.The device has the structures of negative pressure dust removal feeding, gravity quantitative detection and silica gel blowing anti-blocking, realizes closed and dust-free conveying and quantitative and accurate feeding of chemical powder, does not block in the transportation process, and improves the production efficiency of powder and reduces the cost.

Description

Technical Field

[0001] This invention relates to the field of powder conveying technology, and more specifically to a device for conveying powder in the chemical industry and its usage method. Background Technology

[0002] In the production and processing of chemical products, powder material conveying is a crucial pre-process. Among the more common powder materials, such as gaseous SiO2, talc, and calcium carbonate, vacuum systems generally handle lower flow rates than positive pressure conveying under the same pipe diameter conditions. Furthermore, it is uneconomical for large-scale, high-capacity applications and is mostly used for small-batch, multi-point material feeding scenarios.

[0003] Powder materials generally have the characteristics of fine particles, easy dust generation, easy agglomeration, and easy adsorption, which places extremely high demands on conveying equipment. General equipment has high energy consumption and high operating costs, and is also prone to blockage during the feeding process. Summary of the Invention

[0004] This invention provides a device and its method for conveying powder in the chemical industry. It has a structure with negative pressure dust removal feeding, gravity quantitative detection, and silica gel blowing to prevent blockage. It realizes closed dust-free conveying and precise quantitative feeding of chemical powder, and will not block during transportation, thereby improving powder production efficiency and reducing costs.

[0005] To solve the above-mentioned technical problems, the present invention provides a device for conveying powder in the chemical industry, including a dust collection bin, a hopper at the bottom of the dust collection bin, the bottom of the hopper being connected to a mixing tank via a discharge pipe, a fan and a feed pipe on the dust collection bin, and a gravity detection structure below the dust collection bin.

[0006] Furthermore, the feeding pipe is equipped with a pneumatic conveyor and a feeding pneumatic valve.

[0007] Furthermore, silicone air blowing plates are provided at intervals on the side of the ash hopper.

[0008] Furthermore, the dust removal hopper is equipped with a level gauge, a pressure relief valve, and a thermometer.

[0009] Furthermore, it includes an inert gas nozzle connected to the dust collection chamber via a pipe.

[0010] Furthermore, it includes a controller and a touchscreen for controlling the aforementioned valves and equipment.

[0011] Furthermore, a compressed air inlet pipe for rinsing the filter bags is provided on the side of the dust collection chamber, and a pressure regulating filter and a pulse valve are provided on the compressed air inlet pipe.

[0012] A method of using the apparatus according to any one of claims 1-7, comprising the following steps: S1. The material is drawn into the dust removal chamber of the dust removal bin through the feed pipe interlock valve by the induced draft fan and falls into the storage hopper; S2. The gravity detection structure runs continuously and stops when the quantitative scale reaches the set weight; S3. The dust generated here is treated by filter bags above the dust collection bin to prevent it from being sucked into the fan; S4. After a period of stillness, the bottom pneumatic valve for material discharge is opened, and the material is transported to the designated mixing tank through the discharge pipe and pneumatic conveyor for convenient subsequent process operations.

[0013] The beneficial effects of the present invention are as follows: 1. The present invention is equipped with a gravity quantitative detection structure, which can realize accurate quantitative weighing and conveying of powder materials, automatic start and stop of the feeding process, high conveying and metering accuracy, ensure uniform material ratio and stable product quality in subsequent processes, and meet the needs of refined batching production.

[0014] 2. The ash hopper is equipped with silicone air blowing plates on both sides and a pipeline pneumatic conveyor at the bottom. It has dual anti-blocking activation from the storage end and the conveying end, effectively breaking up powder agglomerates, eliminating wall accumulation, and preventing pipeline blockage. This ensures continuous and smooth powder conveying and greatly improves the stability of equipment operation.

[0015] 3. It integrates multi-parameter monitoring and pressure relief protection structures for material level, temperature, and pressure, monitors the internal working conditions of the equipment in real time, automatically balances the pressure inside the silo, and provides timely warnings of abnormal faults, ensuring the safe and stable operation of the equipment in all aspects and avoiding safety hazards such as over-temperature, over-pressure, and overfilling.

[0016] 4. An inert gas nozzle protection structure is set up, which can introduce inert gas to create an explosion-proof oxygen-free environment, effectively eliminating the risk of dust explosion and material oxidation and deterioration during the transportation of flammable and explosive chemical powders. It is highly adaptable to high-risk working conditions. Attached Figure Description

[0017] Figure 1 This is a schematic block diagram of the overall structure of the present invention.

[0018] The following are the labels in the diagram: 1. Dust collection bin; 2. Ash hopper; 3. Discharge pipe; 4. Mixing tank; 5. Fan; 6. Feed pipe; 7. Gravity detection structure; 8. Pneumatic conveyor; 9. Discharge pneumatic valve; 10. Silicone air blowing plate; 11. Level gauge; 12. Pressure relief valve; 13. Thermometer; 14. Inert gas nozzle; 15. Controller; 16. Touch screen; 17. Compressed air inlet pipe; 18. Pressure regulating filter; 19. Pulse valve. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0020] Reference Figure 1 As shown, an embodiment of the device for conveying powder in the chemical industry and its usage method of the present invention includes a dust collection bin 1, a ash hopper 2 at the bottom of the dust collection bin 1, the bottom of the ash hopper 2 being connected to a mixing tank 4 via a discharge pipe 3, a fan 5 and a feed pipe 6 on the dust collection bin 1, and a gravity detection structure 7 below the dust collection bin 1.

[0021] The feeding pipe 3 is equipped with a pneumatic conveyor 8 and a feeding pneumatic valve 9, which are used to provide pneumatic conveying power and automatic control of pipeline opening and closing, respectively, to ensure that the feeding and conveying is controllable, smooth and efficient.

[0022] Below the ash hopper 2, there are silicone air blowing plates 10 spaced apart. The uniform airflow disturbs and activates the powder material, preventing the material from clumping, sticking to the wall, blocking or bridging.

[0023] The dust removal chamber 1 is equipped with a level gauge 11, a pressure relief valve 12, and a thermometer 13, which respectively realize level monitoring, pressure relief protection, and real-time temperature monitoring to ensure safe and controllable equipment operation.

[0024] It includes an inert gas nozzle 14, which is connected to the dust collection chamber 1 through a pipeline to introduce inert gas to achieve explosion-proof and oxidation-proof protection, and is suitable for high-risk powder conveying conditions.

[0025] It includes a controller 15 and a touch screen 16, which are used to centrally control the overall operating status of various valves, fans 5, conveying structures, dust removal structures and detection structures, so as to realize automated operation of the equipment.

[0026] The dust collection chamber 1 is provided with a compressed air inlet pipe 17 for rinsing the filter bags on its side. The compressed air inlet pipe 17 is provided with a pressure regulating filter 18 and a pulse valve 19 to realize air source purification and pressure regulation and pulse-type automatic dust removal operation.

[0027] The usage method is as follows: S1. Start the top fan 5. Utilize the negative pressure suction of the fan 5 to stably draw external powder materials into the dust removal chamber of the dust removal bin 1 through the interlock valve of the feed pipe 6. Under the action of gravity, the material naturally settles into the bottom ash hopper 2 to complete the storage and buffering, realizing closed negative pressure dust-free feeding.

[0028] S2. During the entire operation of the equipment, the gravity detection structure 7 below the dust removal chamber 1 continuously monitors the total weight of the material in the chamber in real time and dynamically feeds back the weighing data to the controller 15 and the touch screen 16. When the weight of the buffered powder material reaches the preset weight of the system, the controller 15 automatically controls the fan 5 and the feed interlock valve to stop the feeding operation and complete the quantitative and accurate storage.

[0029] S3. During the negative pressure feeding of powder, a large amount of fine dust will be generated. The dust rises with the airflow and enters the upper part of the dust collection chamber 1. It is processed by the filter bags in the chamber. The fine dust is intercepted by the filter bags and falls back into the chamber, effectively preventing the dust from being directly sucked into the fan 5 and causing wear, blockage and damage to the fan 5. At the same time, the inert gas nozzle 14 can be opened to introduce inert gas according to the working conditions to create an explosion-proof environment.

[0030] S4. After feeding, the equipment remains stationary for a period of time to allow the suspended fine dust in the hopper to settle fully. At the same time, the silicone air blowing plate 10 below the ash hopper 2 continuously generates micro-airflow to activate the material, break up the clumps of powder, and eliminate the accumulation of material on the wall. After the material has settled and stabilized, the controller 15 automatically opens the bottom discharge pneumatic valve 9. Through the pneumatic conveyor 8, the high-pressure pneumatic force drives the powder material inside the ash hopper 2 to be conveyed through the discharge pipe 3 to the designated mixing tank 4, completing the automated powder conveying operation and providing precise quantitative material for the subsequent mixing process.

[0031] Furthermore, during long-term operation, the compressed air intake pipe 17, in conjunction with the pressure regulating filter 18 and the pulse valve 19, periodically opens to output clean high-pressure pulse airflow, which automatically pulse-jet cleans the filter bags inside the dust collection chamber 1, shaking off the dust adhering to the surface of the filter bags and ensuring the stable dust removal performance of the filter bags. Throughout the entire operation of the equipment, the level gauge 11, thermometer 13, and pressure relief valve 12 monitor the operating conditions in real time, and automatically issue warnings and provide pressure relief protection when abnormalities occur, ensuring the continuous and safe operation of the equipment.

[0032] The specific structure is explained below: (1) Dust removal, storage and feeding base structure: The main body of the equipment is set with a vertical dust removal silo 1 as the core base for powder feeding, dust purification and material temporary storage. The bottom of the dust removal silo 1 is connected to the ash hopper 2. The cone-shaped flow guide structure of the ash hopper 2 is used to realize the natural collection and centralized buffering of powder materials, effectively avoiding material accumulation and wall adhesion. The bottom end of the ash hopper 2 is connected to the feeding pipe 3, and the end of the feeding pipe 3 is connected to the mixing tank 4 to realize the automated transportation of powder materials to the next process. The dust removal silo 1 is centrally equipped with a fan 5 and a feeding pipe 6. The negative pressure suction of the fan 5 realizes the closed negative pressure feeding of powder materials, ensuring that the feeding process is dust-free and pollution-free. At the same time, the negative pressure feeding can effectively improve the powder feeding efficiency and conveying stability. A pneumatic conveyor 8 and a pneumatic discharge valve 9 are sequentially installed on the discharge pipe 3 at the bottom of the ash hopper 2. The pneumatic discharge valve 9 serves as a pipe on / off control element, which can precisely control the start, stop and close of the discharge process, and realize the automated and controllable switching of the discharge process. The pneumatic conveyor 8 relies on pneumatic power to realize the closed pneumatic conveying of powder materials. It uses high-pressure airflow to drive the powder materials to be conveyed quickly, effectively reducing the adhesion resistance between the material and the pipe wall and improving the powder conveying efficiency.

[0033] (2) Gravity quantitative detection structure: A gravity detection structure 7 is specially installed below the dust removal hopper 1. The gravity detection structure 7 works in conjunction with the dust removal hopper 1 and the ash hopper 2 to buffer the material. It can detect the weight data of the powder material stored in the hopper in real time and realize the quantitative weighing and monitoring of the powder material. The equipment can realize quantitative feeding and automatic shutdown according to the preset conveying weight parameters, and accurately control the amount of powder conveyed at one time.

[0034] Multiple sets of silicone air blowing plates 10 are arranged at intervals below the ash hopper 2. The silicone air blowing plates 10 can continuously blow out a uniform airflow to activate the powder materials that are accumulated, stuck to the wall, or agglomerated inside the ash hopper 2. This effectively breaks up the agglomerated powder, eliminates the problem of electrostatic adsorption and adhesion of materials, reduces the probability of equipment blockage failure, and improves the continuous operation capability of the equipment.

[0035] (3) Safety monitoring structure: The dust removal silo 1 is equipped with a level gauge 11, a pressure relief valve 12 and a thermometer 13 to build a comprehensive safety monitoring and protection system for all working conditions. The level gauge 11 monitors the powder level inside the dust removal silo 1 in real time, and the thermometer 13 monitors the working temperature inside the silo in real time to promptly identify potential overheating hazards; the pressure relief valve 12 can automatically release pressure when the pressure inside the silo rises abnormally to balance the air pressure inside and outside the silo.

[0036] (4) Inert gas explosion-proof protection structure. The equipment is equipped with an inert gas nozzle 14. The inert gas nozzle 14 is connected to the dust removal chamber 1 through a dedicated pipeline. According to the needs of flammable and explosive powder conveying, nitrogen and other inert gases can be continuously or intermittently introduced into the chamber to replace the air in the chamber, reduce the oxygen concentration, suppress the conditions for powder dust combustion and explosion, and effectively prevent the problems of fine chemical powder dust explosion and oxidation deterioration.

[0037] (5) Automatic pulse filter bag cleaning structure: A compressed air inlet pipe 17 is arranged on the side of the dust collection chamber 1 as the air source channel for automatic filter bag cleaning. A pressure regulating filter 18 and a pulse valve 19 are installed on the compressed air inlet pipe 17 in sequence. The pressure regulating filter 18 can filter and purify the compressed air and regulate the pressure to ensure that the cleaning air source is clean and the pressure is stable. The pulse valve 19 can realize pulse intermittent jetting. The high-pressure clean airflow instantly washes the surface of the filter bag inside the dust collection chamber 1, quickly shakes off the dust adsorbed on the surface of the filter bag, realizes automatic cleaning and regeneration of the filter bag, solves the problems of easy clogging of traditional filter bags, dust removal efficiency decay, and cumbersome manual cleaning, and ensures long-term efficient operation of the dust collection system.

[0038] The embodiments described above are merely preferred embodiments for fully illustrating the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A device for conveying powder in the chemical industry, characterized in that, It includes a dust removal bin (1), a dust hopper (2) is provided at the bottom of the dust removal bin (1), the bottom of the dust hopper (2) is connected to the mixing tank (4) through a discharge pipe (3), and a fan (5) and a feed pipe (6) are provided on the dust removal bin (1); A gravity detection structure (7) is installed below the dust removal chamber (1).

2. The device for conveying powder in the chemical industry as described in claim 1, characterized in that, The feeding pipe (3) is equipped with a pneumatic conveyor (8) and a feeding pneumatic valve (9).

3. The device for conveying powder in the chemical industry as described in claim 1, characterized in that, The ash hopper (2) is provided with silicone air blowing plates (10) at intervals on its side.

4. The device for conveying powder in the chemical industry as described in claim 1, characterized in that, The dust removal chamber (1) is equipped with a level gauge (11), a pressure relief valve (12), and a thermometer (13).

5. The device for conveying powder in the chemical industry as described in claim 1, characterized in that, It includes an inert gas nozzle (14) connected to the dust collection chamber (1) via a pipe.

6. The device for conveying powder in the chemical industry as described in claim 1, characterized in that, It includes a controller (15) and a touch screen (16) for controlling the aforementioned valves and equipment.

7. The device for conveying powder in the chemical industry as described in claim 1, characterized in that, The dust collection chamber (1) is provided with a compressed air inlet pipe (17) for rinsing the filter bags on its side. The compressed air inlet pipe (17) is provided with a pressure regulating filter (18) and a pulse valve (19).

8. A method of using the apparatus according to any one of claims 1-7, characterized in that, Includes the following steps: S1. The material is drawn into the dust removal chamber of the dust removal bin (1) through the feed pipe (6) interlock valve by the induced draft fan (5) and falls into the storage hopper; S2. The gravity detection structure (7) runs continuously and stops when the quantitative scale reaches the set weight. S3. The dust generated here is treated by the filter bag above the dust removal chamber (1) to prevent it from being sucked into the fan (5); S4. After a period of stillness, the bottom discharge pneumatic valve (9) is opened, and the material is transported to the designated mixing tank (4) through the discharge pipe (3) and the pneumatic conveyor (8) for convenient subsequent process operations.

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