Powder pneumatic conveying system and application thereof

Abstract

The present application relates to a kind of powder pneumatic conveying system and its application, including compressed air processing device, pneumatic conveying device, continuous feeding device, material-gas separation device and material launching device;Compressed air processing device includes air compressor, provides high-pressure gas for the whole system;Pneumatic conveying device includes two valve boxes and multiple pipelines, high-pressure gas passes through valve box via pipeline, and valve box controls corresponding pipeline operation;Continuous feeding device includes storage tank and vertical sleeve, the bottom of storage tank is connected with vertical sleeve;Material-gas separation device includes dust collector and star-type unloader, the bottom of dust collector is connected with star-type unloader;Material launching device includes left mixed launch tank, right mixed launch tank and balance bin, the bottom of left mixed launch tank and right mixed launch tank is connected with balance bin;The whole system saves air supplement time, achieves the purpose of continuous conveying powder, simultaneously prolongs operation time, improves operation efficiency.

Description

Technical Field

[0001] This invention relates to a powder pneumatic conveying system and its application, belonging to the field of fire protection equipment technology. Background Technology

[0002] With advancements in manufacturing technology and increased emphasis on health, production and transportation methods are increasingly geared towards safety, hygiene, cost reduction, and efficiency improvement. Currently, mixed jet technology has been applied in the firefighting field and has experienced rapid development in recent years. Mixing water-based extinguishing agents with polymer resin materials to form a gel for spraying achieves both cooling and leverages the oxygen-barrier and heat-insulating advantages of the resin, reducing extinguishing time and significantly improving extinguishing efficiency. However, vehicle-mounted powder delivery systems are relatively simple, often using nitrogen tanks for powder transport, resulting in short operation times and low efficiency. Furthermore, during pneumatic conveying, particle movement changes at bends, easily leading to powder accumulation and blockages. Blockages during firefighting operations can range from affecting transport speed and efficiency and damaging pipelines to seriously endangering lives and property.

[0003] Chinese patent document CN208389229U discloses a multi-functional, large-capacity dry powder fire truck extinguishing device, including a nitrogen cylinder group, a nitrogen pressure reducing device, an air supply reel, and a powder supply pipeline interface. The nitrogen cylinder group is connected to the dry powder tank via the nitrogen pressure reducing device, and the dry powder tank is equipped with an air supply pipeline connected to the air supply reel. Patent document CN204864647U discloses a dual-tank dry powder fire truck, carrying two dry powder tanks and using a nitrogen cylinder group as the power source for spraying powder. Each nitrogen cylinder in the nitrogen cylinder group is connected to dry powder tank one and dry powder tank two, respectively. The above patents do not address the issue of continuous, long-term operation of the powder, and have significant limitations. Patent document CN215309877U discloses an integrated dry powder fire extinguishing system, in which an air compressor is connected to a nitrogen pressurization system, and the nitrogen pressurization system is driven by compressed air provided by the air compressor. A nitrogen storage unit and a nitrogen delivery system are connected to the nitrogen pressurization system in sequence, and a generator is connected to the air compressor to provide it with electrical energy.

[0004] Traditional solutions still suffer from the problem of the superabsorbent polymer (SAP) meeting and contacting the water / water-based medium to reach a gel phase before spraying, which can lead to clogging of the spray gun or nozzle during spraying. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a pneumatic powder conveying system to solve problems such as short operation time, low efficiency, and easy pipe blockage in fire truck-mounted powder conveying operations.

[0006] The present invention also provides a method for operating a powder pneumatic conveying system.

[0007] The technical solution of the present invention is as follows:

[0008] A powder pneumatic conveying system includes a compressed air treatment device, a pneumatic conveying device, a continuous feeding device, a material-air separation device, and a material launching device;

[0009] Compressed air processing equipment includes an air compressor, which provides high-pressure gas to the entire system;

[0010] The pneumatic conveying device includes two valve boxes and multiple pipelines. High-pressure gas passes through the pipelines and valve boxes, and the valve boxes control the operation of the corresponding pipelines.

[0011] The continuous feeding device includes a storage tank and a vertical sleeve, with the bottom of the storage tank connected to the vertical sleeve;

[0012] The material-gas separation device includes a dust collector and a rotary valve, with the bottom of the dust collector connected to the rotary valve;

[0013] The material launching device includes a left mixing tank, a right mixing tank, and a balancing chamber, with the bottoms of the left and right mixing tanks connected to the balancing chamber.

[0014] The dust collector is connected to the storage tank, the left mixing tank, and the right mixing tank via a dust collection inlet pipe. The vertical sleeve is connected to the top of the left mixing tank and the right mixing tank via a feeding pipe. High-pressure gas is connected to the feeding pipe via a valve box and a feeding inlet pipe. High-pressure gas is also connected to the top, middle, and bottom of the left mixing tank and the right mixing tank via an inlet pipe via a valve box.

[0015] Preferably, the compressed air treatment device further includes a dryer and a filter, with the air compressor, dryer, and filter connected in sequence. The advantage of this design is that it can provide clean, dry, high-pressure gas for the entire system.

[0016] Preferably, the bottom of the storage tank is connected to a vertical sleeve via a flange.

[0017] Preferably, the storage tank has a feed inlet at the top, which is connected to a quick-release interface via a flange. The advantage of this design is that the quick-release interface allows for rapid connection to the feed inlet, enabling the filling of the storage tank with material.

[0018] Preferably, a pressure gauge and a level gauge are installed on the top of the storage tank.

[0019] Preferably, the bottom of the dust collector is connected to the rotary valve via a flange.

[0020] Preferably, the top of the mixing tank is connected to the feeding pipeline via a flange.

[0021] Preferably, the bottom of the mixing tank is connected to the balancing chamber via a flange.

[0022] Preferably, the mixing tank is provided with an annular air inlet pipe in the middle. The advantage of this design is that high-pressure gas enters the mixing tank from the top, middle and bottom, forming a three-in-one air intake method. The annular air inlet pipe in the middle makes the air intake inside the tank more uniform, and the powder is in a "boiling" state inside the tank.

[0023] Preferably, the mixing tank is provided with a level gauge at both the top and bottom.

[0024] Preferably, the balancing chamber is also equipped with three outlets, which are respectively connected to the top water cannon and the left and right water guns. The advantage of this design is that the balancing chamber can deliver powder to the left and right water guns separately or simultaneously through the outlets. With water guns on both sides and a water cannon on the top, all-around operation can be achieved, improving operational convenience and efficiency.

[0025] Preferably, a pneumatic ball valve is installed on the dust collection air inlet pipe connecting the dust collector and the storage tank.

[0026] Preferably, a pneumatic ceramic ball valve is installed on the dust collection inlet pipe connecting the dust collector and the mixing tank, and a ceramic air valve is installed on the feeding pipe connecting the vertical sleeve and the mixing tank.

[0027] Preferably, the feeding air inlet pipe is equipped with a one-way valve, a ball valve, a manual pressure regulating valve, a solenoid valve, and a gas flow meter.

[0028] Preferably, the intake pipe is equipped with a one-way valve, a ball valve, an electric pressure regulating valve, a solenoid valve, and a gas flow meter.

[0029] Preferably, the high-pressure gas is further provided with a water gun cleaning inlet pipe via the valve box, and the water gun cleaning inlet pipe is connected to the left and right water guns.

[0030] Preferably, the high-pressure gas also has an inlet pipe reserved through the valve box.

[0031] Preferably, the high-pressure gas is further provided with a pulse inlet pipe and a vibration inlet pipe via the valve box, and the pulse inlet pipe and the vibration inlet pipe are connected to the dust collector.

[0032] Preferably, the vibration intake pipe is equipped with a manual pressure regulating valve, a ball valve, a solenoid valve and a one-way valve, and the pulse intake pipe is equipped with a one-way valve.

[0033] Preferably, the high-pressure gas is further provided with a water cannon cleaning air inlet pipe via the valve box, and the water cannon cleaning air inlet pipe is connected to the top water cannon.

[0034] A method for operating a powder pneumatic conveying system includes the following steps:

[0035] (1) Loading: Open the quick-release connector on the top of the storage tank, open the pneumatic ball valve on the dust removal air inlet pipe between the storage tank and the dust collector, turn on the dust collector, and add powder into the storage tank through the quick-release connector from external equipment;

[0036] (2) Feeding the left mixing tank: Open the pneumatic ceramic ball valve on the dust removal inlet pipe between the left mixing tank and the dust collector, open the ceramic ball valve on the left mixing tank feeding pipe, open the valve on the left mixing tank feeding inlet pipe, open the star-shaped unloader, feed the left mixing tank from the storage tank, and discharge the dust-laden exhaust gas into the dust collector.

[0037] (3) Feeding the right mixing tank: After the left mixing tank is fed, open the pneumatic ceramic ball valve on the dust removal inlet pipe between the right mixing tank and the dust collector, open the ceramic ball valve on the right mixing tank feeding pipe, open the valve on the right mixing tank feeding inlet pipe, open the star-shaped unloader, and feed the right mixing tank from the storage tank. The dust-laden exhaust gas is discharged into the dust collector.

[0038] (4) Powder injection: High-pressure gas enters the left mixing tank through the air inlet pipe to make the powder boil, and the balance chamber is opened to connect with the left mixing tank to realize the injection of powder from the left mixing tank; when the powder in the left mixing tank is consumed, the balance chamber is opened to connect with the right mixing tank to realize the injection of powder from the right mixing tank.

[0039] (5) Replacement of materials: When the powder in the left mixing tank is consumed, open the pneumatic ceramic ball valve on the dust removal air inlet pipe between the left mixing tank and the dust collector to depressurize the left mixing tank. After depressurization, open the ceramic ball valve on the feeding pipe of the left mixing tank and open the valve on the feeding air inlet pipe of the left mixing tank to replenish the left mixing tank. When the powder in the right mixing tank is consumed, open the pneumatic ceramic ball valve on the dust removal air inlet pipe between the right mixing tank and the dust collector to depressurize the right mixing tank. After depressurization, open the ceramic ball valve on the feeding pipe of the right mixing tank and open the valve on the feeding air inlet pipe of the right mixing tank to replenish the right mixing tank.

[0040] Technical features and beneficial effects of the present invention:

[0041] 1. The conveying system of this invention uses an air compressor to supply gas independently, and the gas is produced continuously, realizing the continuous conveying of powder. This avoids the trouble of having to refill the gas when the gas is used up, as is the case with nitrogen tanks, saving gas replenishment time, extending the operation time, and improving operation efficiency.

[0042] 2. The conveying system of this invention adopts a three-tank powder storage system, which has a large storage capacity and can complete the replacement of powder between two mixing tanks and the spraying of powder. It can also realize the simultaneous spraying of powder and feeding, achieving the purpose of continuous powder conveying. The storage tanks not only increase the loading capacity, but also provide redundancy for uninterrupted fire extinguishing operations.

[0043] 3. The conveying system of this invention enables the transfer of materials when the feeding vehicle and other water supply vehicles are working together, that is, to replenish materials while spraying fire extinguishing.

[0044] 4. The water guns and water cannons in the conveying system of this invention are equipped with cleaning pipelines. After the powder spraying operation is completed, the outlet pipelines are cleaned, reducing the risk of blockage.

[0045] 5. The conveying system of this invention enables uninterrupted conveying of powder through multiple outlets, and can supply different equipment, such as fire hoses, individual backpack firefighting equipment, firefighting robots, etc., greatly increasing the flexibility of the equipment. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the structure of the powder pneumatic conveying system of the present invention;

[0047] Figure 2 This is a perspective view of the powder pneumatic conveying system of the present invention;

[0048] Figure 3 This is a schematic diagram of the powder conveying pipeline in the present invention. Figure 1 ;

[0049] Figure 4 This is a schematic diagram of the powder conveying pipeline in the present invention. Figure 2 ;

[0050] Figure 5 This is a schematic diagram of the right valve box delivery pipeline in this invention;

[0051] Figure 6 This is a schematic diagram of the left valve box delivery pipeline in this invention;

[0052] In the diagram: 1-Storage tank, 2-Dust collector, 3-Mixing tank, 4-Frame, 5-Balance bin, 6-Rotary feeder, 7-Feeding shoe, 8-Vertical sleeve, 9-Electrical control box, 10-Left valve box, 11-Left mixing tank, 12-Water cannon outlet, 13-Right mixing tank, 14-Right water gun outlet, 15-Right valve box, 16-Storage tank dust collector air inlet pipe, 17-Feeding pipe, 18-Right mixing tank dust collector air inlet pipe, 19-Right mixing tank feeding pipe, 20-Left mixing tank feeding pipe, 21-Left mixing tank dust collector air inlet pipe, 22-Pulse air inlet pipe 23-Vibration air inlet pipe, 24-Right mixing tank top air inlet pipe, 25-Right mixing tank middle air inlet pipe, 26-Right mixing tank bottom air inlet pipe, 27-Water cannon cleaning air inlet pipe, 28-Right water gun cleaning air inlet pipe, 29-Right valve box valve inlet pipe, 30-Right valve box main air inlet pipe, 31-Left mixing tank top air inlet pipe, 32-Feeding air inlet pipe, 33-Left valve box main air inlet pipe, 34-Reserved air inlet pipe, 35-Left water gun cleaning air inlet pipe, 36-Left mixing tank bottom air inlet pipe, 37-Left mixing tank middle air inlet pipe. Detailed Implementation

[0053] The present invention will be further described below with reference to the embodiments and accompanying drawings, but is not limited thereto.

[0054] Example 1:

[0055] like Figure 1-6 As shown, this embodiment provides a powder pneumatic conveying system, including a compressed air treatment device, a pneumatic conveying device, a continuous feeding device, a material-air separation device, and a material launching device;

[0056] Compressed air processing equipment includes an air compressor, which provides high-pressure gas to the entire system;

[0057] The pneumatic conveying device includes two valve boxes and multiple pipelines. High-pressure gas passes through the pipelines and valve boxes, and the valve boxes control the operation of the corresponding pipelines.

[0058] The continuous feeding device includes a storage tank and a vertical sleeve, with the bottom of the storage tank connected to the vertical sleeve;

[0059] The material-gas separation device includes a dust collector and a rotary valve, with the bottom of the dust collector connected to the rotary valve;

[0060] The material launching device includes a left mixing tank, a right mixing tank, and a balancing chamber, with the bottoms of the left and right mixing tanks connected to the balancing chamber.

[0061] The dust collector 2 is connected to the storage tank 1, the left mixing tank 11, and the right mixing tank 13 via three dust collection air inlet pipes. The vertical sleeve 8 is connected to the top of the left mixing tank 11 and the right mixing tank 13 via a feeding pipe. High-pressure gas is connected to the feeding pipe via the valve box and the feeding air inlet pipe 32. High-pressure gas is also connected to the top, middle, and bottom of the left mixing tank 11 and the right mixing tank 13 via six air inlet pipes via the valve box.

[0062] Specifically, the entire conveying system is placed on a frame 4, isolated from the ground, and is easy to install on a fire truck.

[0063] The compressed air treatment unit also includes a dryer and a filter. The air compressor, dryer, and filter are connected in sequence to provide clean, dry, high-pressure gas for the entire system. After the high-pressure gas is generated, it enters the main intake pipes 33 and 30 of the left and right valve boxes, respectively. In the left and right valve boxes, the main intake pipes have multiple branches to achieve different functions, and corresponding valves are installed on the multiple branches to achieve opening and control.

[0064] The storage tank 1 has a feed inlet at the top, which is connected to a quick-release interface via a flange. External equipment can be quickly connected to the feed inlet via the quick-release interface to fill the storage tank 1. The top of the storage tank 1 is connected to the dust collector 2 via a dust collection air inlet pipe 16. By turning on the dust collector 2, a negative pressure is created inside the storage tank 1, facilitating rapid filling. A pressure gauge and a level gauge are installed at the top of the storage tank 1 to monitor the pressure and material level inside. The bottom of the storage tank 1 is connected to a vertical sleeve 8 via a flange.

[0065] The tops of the left and right mixing tanks are connected to the feeding pipeline via flanges. The bottoms of the left and right mixing tanks are connected to the balance chamber 5 via flanges. A ring-shaped air inlet pipe is located in the middle of the left and right mixing tanks. High-pressure gas enters the mixing tanks from the top, middle, and bottom, forming a three-dimensional air intake system. The top air inlet provides downward pressure for rapid feeding; the ring-shaped air inlet in the middle creates a "boiling" state in the tank, facilitating powder discharge; and the bottom air inlet controls the left and right mixing tanks, guiding the airflow to spray powder. A level gauge is located at the top and bottom of each of the left and right mixing tanks to monitor the powder dosage.

[0066] Ceramic air valves are installed on both sides of the balance chamber 5, which connect to the left and right mixing tanks. These valves can be used to connect to either the left mixing tank 11 or the right mixing tank 13, enabling alternating spraying. The bottom air inlets of the left and right mixing tanks are connected to both sides of the balance chamber 5. When the ceramic air valve on the left or right side of the balance chamber 5 is opened, the powder enters the balance chamber. At the same time, the bottom air inlet on that side is also opened, pressurizing the powder entering the balance chamber and guiding it for spraying.

[0067] The balancing chamber 5 also has three outlets, which connect to the top water cannon and the left and right water guns, respectively. Valves are installed at each of the three outlets. The balancing chamber 5 can deliver powder to the left and right water guns individually or simultaneously through these outlets. With water guns on both sides and a water cannon on the top, it allows for omnidirectional operation, improving operational convenience and efficiency.

[0068] A pneumatic ball valve is installed on the dust collector inlet pipe 16 connecting the dust collector 2 to the storage tank 1. Pneumatic ceramic ball valves are installed on the dust collector inlet pipes 21 and 18 connecting the dust collector 2 to the left and right mixing tanks. The bottom of the dust collector 2 is connected to the rotary valve 6 via a flange. The vertical sleeve 8 and the rotary valve 6 are both connected to the feeding pipe 17 via the feeding shoe 7. A ceramic air valve is installed on the feeding pipe 17. The feeding inlet pipe 32 is connected to the feeding pipe 17 and is equipped with a check valve, a ball valve, a manual pressure regulating valve, a solenoid valve, and a gas flow meter to pressurize the powder entering the feeding pipe 17, facilitating rapid feeding into the left and right mixing tanks. Check valves, ball valves, electric pressure regulating valves, solenoid valves, and gas flow meters are installed on the top, middle, and bottom inlet pipes of the left and right mixing tanks.

[0069] High-pressure gas is also connected to dust collector 2 via a pulse inlet pipe 22 and a vibration inlet pipe 23 through the right valve box. The pulse inlet pipe 22 and vibration inlet pipe 23 are connected to dust collector 2. The pulse inlet pipe 22 can be opened or closed at regular intervals, using the negative pressure generated by the dust collector to depressurize the left and right mixing tanks. The vibration inlet pipe 23 can be opened as needed to agitate the dust collector, facilitating the removal of powder (especially damp, wall-attached powder) from the dust collector, ensuring all material enters the rotary valve. The vibration inlet pipe is equipped with a manual pressure regulating valve, a ball valve, a solenoid valve, and a check valve, while the pulse inlet pipe is equipped with a check valve.

[0070] This embodiment of the powder pneumatic conveying system utilizes an independent compressed air processing unit to continuously provide clean, dry, high-pressure gas, eliminating the inconvenience of using traditional nitrogen cylinders as the power source for powder spraying. The entire system employs an operation configuration consisting of one storage tank and two mixing tanks. This increases the total amount of powder carried (both the storage tank and mixing tanks are pre-filled with powder before operation). Furthermore, the two mixing tanks allow for alternating spraying and replenishment, improving work efficiency and extending operation time. The system also features two valve boxes, one on the left and one on the right, each controlling different air paths. Additionally, the water guns and water cannons have cleaning air paths, allowing for cleaning of the nozzles after firefighting operations to prevent blockages. The entire system is mounted on a frame, avoiding contact with the ground and collisions with the vehicle's external casing, while also significantly reducing system size and saving space.

[0071] Example 2:

[0072] A powder pneumatic conveying system, structured as described in Example 1, differs in that: high-pressure gas is further provided via a left water gun cleaning air inlet pipe 35 and a right water gun cleaning air inlet pipe 28 through a valve box. After fire extinguishing, high-pressure gas can be introduced into the water gun cleaning air inlet pipe to perform air cleaning of the water gun, preventing powder from clogging the nozzle.

[0073] Example 3:

[0074] A powder pneumatic conveying system, structured as described in Example 1, differs in that: high-pressure gas is further provided via a water cannon cleaning air inlet pipe 27 through a valve box, and the water cannon cleaning air inlet pipe 27 is connected to the top water cannon. After fire extinguishing, high-pressure gas can be introduced into the water cannon cleaning air inlet pipe to perform air cleaning of the water cannon, preventing powder from clogging the cannon nozzle.

[0075] Example 4:

[0076] like Figure 6 As shown, a powder pneumatic conveying system has the structure described in Example 1, except that: the high-pressure gas also has an air inlet pipe 34 reserved through the valve box.

[0077] Example 5:

[0078] A method for operating a powder pneumatic conveying system using any of the technical solutions in Examples 1-4 includes the following steps:

[0079] (1) Loading: Open the quick-release connector on the top of the storage tank 1, open the pneumatic ball valve on the dust removal air inlet pipe 16 between the storage tank 1 and the dust collector 2, open the dust collector 2 to create a negative pressure inside the storage tank, and quickly add powder into the storage tank through the quick-release connector from the external equipment.

[0080] (2) Feeding the left mixing tank: Open the pneumatic ceramic ball valve on the dust removal air inlet pipe 21 between the left mixing tank 11 and the dust collector 2, open the ceramic ball valve on the feeding pipe of the left mixing tank 11, open the valve on the feeding air inlet pipe of the left mixing tank, open the star-shaped unloader 6, and feed the left mixing tank 11 from the storage tank 1. The dust-containing exhaust gas is discharged into the dust collector.

[0081] (3) Feeding the right mixing tank: After the left mixing tank 11 is fed, open the pneumatic ceramic ball valve on the dust removal air inlet pipe 18 between the right mixing tank 13 and the dust collector 2, open the ceramic ball valve on the right mixing tank feeding pipe, open the valve on the right mixing tank feeding air inlet pipe, open the star unloader 6, and feed the right mixing tank 13 from the storage tank 1. The dust-containing exhaust gas is discharged into the dust collector 2.

[0082] (4) Powder injection: High-pressure gas enters the left mixing tank 11 through the middle air inlet pipe to make the powder boil, the balance chamber 5 is opened to connect with the left mixing tank 11, and the bottom air inlet pipe is opened at the same time to realize the injection of powder from the left mixing tank 11; when the powder in the left mixing tank 11 is consumed, the balance chamber 5 is opened to connect with the right mixing tank 13 to realize the injection of powder from the right mixing tank 13.

[0083] (5) Replacement of materials: When the powder in the left mixing tank 11 is consumed, open the pneumatic ceramic ball valve on the dust removal air inlet pipe between the left mixing tank 11 and the dust collector 2 to depressurize the left mixing tank 11. After depressurization, open the ceramic ball valve on the left mixing tank feeding pipe and open the valve on the left mixing tank feeding air inlet pipe to replenish the left mixing tank. When the powder in the right mixing tank 13 is consumed, open the pneumatic ceramic ball valve on the dust removal air inlet pipe between the right mixing tank 13 and the dust collector 2 to depressurize the right mixing tank 13. After depressurization, open the ceramic ball valve on the right mixing tank feeding pipe and open the valve on the right mixing tank feeding air inlet pipe to replenish the right mixing tank.

[0084] The above description is merely a specific embodiment of the present invention, and the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A powder pneumatic conveying system, comprising a compressed air processing device, a pneumatic conveying device, a continuous feeding device, a material-air separation device, and a material launching device; Compressed air processing equipment includes an air compressor, which provides high-pressure gas to the entire system; The pneumatic conveying device includes two valve boxes and multiple pipelines. High-pressure gas passes through the pipelines and valve boxes, and the valve boxes control the operation of the corresponding pipelines. The continuous feeding device includes a storage tank and a vertical sleeve, with the bottom of the storage tank connected to the vertical sleeve; The material-gas separation device includes a dust collector and a rotary valve, with the bottom of the dust collector connected to the rotary valve; The material launching device includes a left mixing tank, a right mixing tank, and a balancing chamber, with the bottoms of the left and right mixing tanks connected to the balancing chamber. in, The top of the dust collector is connected to the storage tank, the left mixing tank, and the right mixing tank via a dust collection inlet pipe. The vertical sleeve is connected to the top of the left mixing tank and the right mixing tank via a feeding pipe. High-pressure gas is connected to the feeding pipe via a valve box and a feeding inlet pipe. High-pressure gas is also connected to the top, middle, and bottom of the left mixing tank and the right mixing tank via an inlet pipe via a valve box.

2. The powder pneumatic conveying system as described in claim 1, characterized in that, The balancing chamber is also equipped with three outlets, which are connected to the top water cannon and the left and right water guns, respectively.

3. The powder pneumatic conveying system as described in claim 1, characterized in that, A pneumatic ball valve is installed on the dust collection inlet pipe connecting the dust collector and the storage tank.

4. The powder pneumatic conveying system as described in claim 1, characterized in that, A pneumatic ceramic ball valve is installed on the dust collection inlet pipe connecting the dust collector and the mixing tank, and a ceramic air valve is installed on the feeding pipe connecting the vertical sleeve and the mixing tank.

5. The powder pneumatic conveying system as described in claim 1, characterized in that, The feeding and air inlet pipeline is equipped with a one-way valve, a ball valve, a manual pressure regulating valve, a solenoid valve, and a gas flow meter.

6. The powder pneumatic conveying system as described in claim 1, characterized in that, The intake pipe is equipped with a check valve, a ball valve, an electric pressure regulating valve, a solenoid valve, and a gas flow meter.

7. The powder pneumatic conveying system as described in claim 2, characterized in that, The high-pressure gas is also equipped with a water gun cleaning inlet pipe via the valve box, and the water gun cleaning inlet pipe is connected to the left and right water guns.

8. The powder pneumatic conveying system as described in claim 1, characterized in that, The high-pressure gas is also provided with a pulse inlet pipeline and a vibration inlet pipeline via the valve box, and the pulse inlet pipeline and the vibration inlet pipeline are connected to the dust collector.

9. The powder pneumatic conveying system as described in claim 8, characterized in that, The vibration intake pipe is equipped with a manual pressure regulating valve, a ball valve, a solenoid valve, and a one-way valve, while the pulse intake pipe is equipped with a one-way valve.

10. A method of operating the powder pneumatic conveying system as described in any one of claims 1-9, characterized in that, Includes the following steps: (1) Loading: Open the quick-release connector on the top of the storage tank, open the pneumatic ball valve on the dust removal air inlet pipe between the storage tank and the dust collector, turn on the dust collector, and add powder into the storage tank through the quick-release connector from external equipment; (2) Feeding the left mixing tank: Open the pneumatic ceramic ball valve on the dust removal inlet pipe between the left mixing tank and the dust collector, open the ceramic ball valve on the left mixing tank feeding pipe, open the valve on the left mixing tank feeding inlet pipe, open the star-shaped unloader, feed the left mixing tank from the storage tank, and discharge the dust-laden exhaust gas into the dust collector. (3) Feeding the right mixing tank: After the left mixing tank is fed, open the pneumatic ceramic ball valve on the dust removal inlet pipe between the right mixing tank and the dust collector, open the ceramic ball valve on the right mixing tank feeding pipe, open the valve on the right mixing tank feeding inlet pipe, open the star-shaped unloader, and feed the right mixing tank from the storage tank. The dust-laden exhaust gas is discharged into the dust collector. (4) Powder injection: High-pressure gas enters the left mixing tank through the air inlet pipe to make the powder boil, and the balance chamber is opened to connect with the left mixing tank to realize the injection of powder from the left mixing tank; when the powder in the left mixing tank is consumed, the balance chamber is opened to connect with the right mixing tank to realize the injection of powder from the right mixing tank. (5) Replacement of materials: When the powder in the left mixing tank is consumed, open the pneumatic ceramic ball valve on the dust removal air inlet pipe between the left mixing tank and the dust collector to depressurize the left mixing tank. After depressurization, open the ceramic ball valve on the feeding pipe of the left mixing tank and open the valve on the feeding air inlet pipe of the left mixing tank to replenish the left mixing tank. When the powder in the right mixing tank is consumed, open the pneumatic ceramic ball valve on the dust removal air inlet pipe between the right mixing tank and the dust collector to depressurize the right mixing tank. After depressurization, open the ceramic ball valve on the feeding pipe of the right mixing tank and open the valve on the feeding air inlet pipe of the right mixing tank to replenish the right mixing tank.

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