High-temperature and high-pressure pneumatic conveying material feeding tank

Abstract

A sleeving hole is formed in the side wall of the lower middle portion of a tank body in the radial direction, a conveying pipeline is sleeved with the sleeving hole and penetrates through the tank body, a reverse feeding pipe is downwards arranged in the middle of the conveying pipeline in the radial direction of the conveying pipeline, and a conical shell is arranged at the lower end opening of the tank body. The pushing tooth rake is installed below the reverse feeding pipe and right faces the reverse feeding pipe, a speed reduction motor is installed on a bottom plate of the tank body through a support, and the speed reduction motor is connected with a main shaft of the pushing tooth rake; according to the feeding tank, materials are conveyed in the mode that the conveying pipeline transversely penetrates through the tank body and the feeding pipe is reversely arranged, the materials are fed into the feeding pipe through pressure applied to the materials by the pressurizing pipe and upward disturbing force of the blades, the fluctuation degree of the materials entering the conveying pipe can be effectively reduced in the mode, and the materials evenly enter the conveying pipe; two-stage sealing and a circulating water cooling channel are arranged on the pushing tooth rake connecting shaft system, so that the temperature of a conveying pipeline can be effectively controlled, the sealing performance and the structural stability of the conveying pipeline are ensured, and the conveying efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of pneumatic conveying, and in particular to a high-temperature and high-pressure pneumatic conveying material dispensing tank. Background Art

[0002] Pneumatic conveying technology uses compressed air to transport non-adhesive bulk materials over short distances in pipelines. Pneumatic conveying has the advantages of being clean, environmentally friendly, safe, and highly automated. The basic principle of pneumatic conveying is to apply a certain pressure and speed of air flow in the pipeline to make the material particles liquefied, thereby achieving continuous and stable transportation of the material. During the transportation process, the pipeline presents a gas-solid two-phase flow state, and the material particles are transported along the pipeline under the action of the airflow.

[0003] The pneumatic conveying system can adapt to different material characteristics and conveying environments, such as powdery, granular or free-flowing materials. At the same time, it can also design different conveying routes and unloading points according to specific needs. It has high flexibility. The pipeline of the pneumatic conveying system can be designed in horizontal, vertical or inclined directions to adapt to different production sites and equipment layouts.

[0004] In the pneumatic conveying system, the dispensing tank provides a closed space for temporarily storing the materials to be transported. The conveying pipeline is usually connected to the lower port of the dispensing tank so that the materials can enter the conveying pipeline in time for forward transportation. This dispensing tank has a better conveying effect for materials at normal temperature and pressure. When conveying high-temperature and high-pressure materials in the metallurgical industry, for example, there is a problem of poor fluidity of the materials in the dispensing pipe, resulting in poor conveying. It is necessary to add a mechanical stirring device to enhance its fluidity. However, the heat of the high-temperature material will cause the rotary seal of the mechanical stirring device to fail, which cannot meet the high-temperature and high-pressure conveying requirements. Therefore, the dispensing tank structure needs to be improved to solve this problem. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a high-temperature and high-pressure pneumatic conveying material dispensing tank.

[0006] The technical solution of the present invention is: a high-temperature and high-pressure pneumatic conveying material dispensing tank, comprising a vertically arranged tank body, a conveying pipeline and a pushing tooth rake, the lower end of the tank body is provided with a conical bottom, a circular sleeve hole is radially provided from the middle and lower side wall of the tank body, the conveying pipeline is sleeved in the sleeve hole and passes through the tank body, an air intake valve is provided at the air intake end of the conveying pipeline, a discharge valve is provided at the outlet end of the conveying pipeline, a reverse feed pipe is provided in the middle part of the conveying pipeline along its radial downward direction, the reverse feed pipe is coaxially arranged with the tank body, and the reverse feed pipe extends into the conical bottom of the lower part of the tank body, a conical shell is provided at the lower port of the tank body, a feed port is provided at the upper port, a feed valve is provided at the feed port, the feed valve is connected with the feed pipe, a pushing tooth rake is installed below the reverse feed pipe and faces the reverse feed pipe, the size of the pushing tooth rake is not easy to be too large, and a rake tooth form is adopted to ensure that it can rotate normally in the material, a reduction motor is installed on the bottom plate of the tank body through a bracket, and the reduction motor is connected with the main shaft of the pushing tooth rake.

[0007] Preferably, the sealing member is a conical shell connected to the lower port of the tank body through a flange, and a fluidizing disk is provided at the upper port of the conical shell. The fluidizing disk is a circular disk with circular holes evenly distributed on the edge, and is clamped and fixed between the flanges of the lower port of the tank body and the upper port of the conical shell. The fluidizing disk is densely arranged with air holes, and a fluidizing air pipe is connected to the bottom of the conical shell.

[0008] Preferably, the fluidizing gas pipe is connected to the air inlet end of the conveying pipeline, the fluidizing gas pipe is radially connected to the fluidizing gas pipe, and an air valve is provided on the fluidizing gas pipe.

[0009] Preferably, a pressurizing pipe is connected to the upper portion of the tank body, the pressurizing pipe is connected to the air inlet end of the delivery pipeline, the pressurizing pipe is connected to the delivery pipeline in a radial direction, and an air valve is provided on the pressurizing pipe.

[0010] Preferably, the bracket is a cylindrical bracket, the upper port of the cylindrical bracket is provided with a flange, which is fixedly connected to the conical shell through the flange, the upper port of the cylindrical bracket is provided with a seal, the middle and lower parts are provided with bearings, the reduction motor is installed at the lower port of the cylindrical bracket, and the main shaft of the push tooth rake is connected to the reduction motor after passing through the seal and the bearing.

[0011] Preferably, the sealing member comprises a supporting sleeve and a labyrinth sealing ring, wherein the supporting sleeve is sleeved on the upper port of the supporting cylinder, the labyrinth sealing ring is sleeved in the supporting sleeve, and an auxiliary sealing ring is sleeved below the sealing ring, wherein at least two auxiliary sealing rings are arranged side by side.

[0012] Preferably, a water cooling channel is spirally provided inside the side wall of the cylinder bracket, and the water cooling channel extends to the two ends of the cylinder bracket. The upper part of the cylinder bracket is provided with a water inlet joint connected to the water cooling channel, and the lower part is provided with a water outlet joint connected to the water cooling channel. The water inlet joint and the water outlet joint are connected to the water pump in the cooling water tank.

[0013] Preferably, a pressure relief valve and a pressure gauge are installed on the upper portion of the tank body.

[0014] The beneficial technical effects of the present invention are: (1) The present invention uses a conveying pipe that crosses the tank body and arranges the feed pipe in reverse to convey high-temperature materials. The material is fed into the feed pipe in reverse by the pressure exerted on the material by the pressure pipe and the upward disturbance thrust of the push tooth rake. This method can effectively reduce the fluctuation degree of the material entering the conveying pipe, so that the material enters the conveying pipe evenly. By arranging a two-stage seal and a circulating water cooling channel on the push tooth rake connecting shaft system, the temperature of the conveying pipe can be effectively controlled and its sealing and structural stability can be ensured, thereby improving the conveying efficiency.

[0015] (2) The fluidizing disk of the present invention can evenly introduce high-pressure airflow into the bottom of the tank body, pressurize and fluidize the bottom area of ​​the tank body, improve the fluidity of the material in this area, assist the material to flow toward the reverse feed pipe, improve the feeding efficiency, and at the same time, disturb and cool the high-temperature material, thereby further controlling the stability of the conveying pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Figure 2 yes Figure 1 AA section structural diagram; Figure 3 yes Figure 2 A partial enlarged view of Figure 4 yes Figure 2 BB-direction cross-sectional structural diagram; Figure 5 It is a main structural schematic diagram of the present invention.

[0017] In the figure, 1. tank body, 11. feed port, 12. feed valve, 13. pressure relief valve, 2. conveying pipeline, 21. reverse feed pipe, 3. push tooth rake, 31. stirring cross bar, 311. cylindrical tooth body, 32. main shaft, 33. reduction motor, 4. conical shell, 41. fluidizing disk, 411. air hole, 51. fluidizing air pipe, 52. pressurizing pipe, 61. cylinder bracket, 62. bearing, 63. support sleeve, 64. labyrinth sealing ring, 65. auxiliary sealing ring, 71. water cooling channel, 72. water inlet joint, 73. water outlet joint. DETAILED DESCRIPTION

[0018] Embodiment 1, see attached Figure 1-24. A high-temperature and high-pressure pneumatic conveying material dispensing tank, comprising a vertically arranged tank body 1, a conveying pipeline 2 and a pushing tooth rake 3. A sleeve hole is provided radially from the middle and lower side wall of the tank body. The conveying pipeline 2 is inserted into the sleeve hole and passes through the tank body 1. A reverse feed pipe 21 is provided radially downwardly in the middle of the conveying pipeline 2. The reverse feed pipe is coaxially arranged with the tank body 1. A conical shell 4 is provided at the lower end of the tank body 1, and a feed port 11 is provided at the upper end. The high-temperature material enters the tank body 1 from the feed port 11. A feed valve 12 is provided at the feed port 11. The pushing tooth rake 3 is installed below the reverse feed pipe 21 and faces the reverse feed pipe 21. A certain distance is provided between the pushing tooth rake 3 and the port of the reverse feed pipe 21. A reduction motor 33 is installed on the bottom plate of the tank body 1 through a bracket. The reduction motor is connected to the main shaft 32 of the pushing tooth rake 3. The pushing tooth rake 3 is driven to rotate at the bottom of the pipe body by the reduction motor 33.

[0019] The pushing tooth rake 3 includes a main shaft 32 and a plurality of stirring cross bars 31 evenly distributed radially at the upper end of the main shaft. A plurality of cylindrical tooth bodies 311 are evenly spaced on the stirring cross bars 31. The stirring turbulence effect of the pushing tooth rake 3 assists in pushing the feed. The gap between adjacent stirring cross bars 31 in the tooth rake structure is large, and the feeding will not be hindered during the turbulence pushing process.

[0020] A pressurizing pipe 52 is connected to the upper part of the tank body 1, and the pressurizing pipe is connected to the air inlet end of the conveying pipe 2. An air valve is provided on the pressurizing pipe 52. Part of the high-pressure gas in the conveying pipe 2 is introduced into the upper part of the tank body 1 through the pressurizing pipe 52, and pressure is applied to the tank body 1 to assist the material to flow to the inlet of the conveying pipe 2.

[0021] The sealing member is a conical shell 4 connected to the lower port of the tank body 1 through a flange, a fluidizing disk 41 is provided at the upper port of the conical shell 4, an air chamber is formed between the conical shell 4 and the fluidizing disk, air holes 411 are densely arranged on the fluidizing disk 41, a fluidizing air pipe 51 is connected to the bottom of the conical shell 4, the fluidizing air pipe 51 is connected to the air inlet end of the conveying pipeline 2, an air valve is provided on the fluidizing air pipe 51, the fluidizing air pipe introduces the high-pressure gas in the conveying pipeline into the air chamber, and distributes it evenly to the bottom of the tank body 1 through the fluidizing disk 41, thereby fluidizing the material at the bottom of the tank body 1.

[0022] A pressure relief valve 13 and a pressure gauge are installed on the upper part of the tank body 1. The pressure gauge is used to monitor the pressure inside the tank body 1 in real time. The pressure relief valve 13 is used to discharge the high-pressure gas in the tank body 1 in time to keep the inside of the tank body 1 at a stable preset pressure value.

[0023] The working process and principle of the material delivery tank are as follows: ① the material enters the tank body 1 under the action of the feed valve 12. After the material fills the tank body 1, the gas valves on the fluidizing gas pipe 51 and the pressure pipe 52 are opened in turn. ② the high-pressure gas in the conveying pipeline 2 enters the conical shell 4 from the fluidizing gas pipe 51, and then evenly enters the bottom of the tank body 1 from the air holes 411 on the fluidizing plate 41, pressurizing the material at the bottom to fluidize it. At the same time, the high-pressure gas in the conveying pipeline 2 enters the upper part of the tank body 1 from the pressure pipe 52, exerting downward pressure on the material. ③ the reduction motor 33 is started to drive The dynamic pushing tooth rake 3 rotates at the bottom of the tank body 1. The upward disturbance thrust of the pushing tooth rake 3 and the pressure applied to the upper part of the tank body 1 push the fluidized material upward into the feed pipe. ④ The high-pressure airflow in the conveying pipe 2 drives the material entering from the feed pipe to be conveyed forward. This method can effectively reduce the fluctuation degree of the material entering the conveying pipe, so that the material enters the conveying pipe evenly. By arranging a two-stage seal and a circulating water cooling channel 71 on the connecting shaft system of the pushing tooth rake 3, the temperature of the conveying pipe 2 can be effectively controlled and its sealing and structural stability can be guaranteed, thereby improving the conveying efficiency.

[0024] Embodiment 2, see attached Figure 3 , 5 This embodiment is basically the same as the first embodiment, and the similarities are not repeated here. The difference is that the bracket is a cylindrical bracket 61, a seal is provided at the upper end of the cylindrical bracket, bearings 62 are provided at the middle and lower parts, and a reduction motor 33 is installed at the lower end of the cylindrical bracket 61. The main shaft 32 of the push tooth rake 3 passes through the seal and the bearing 62 and is connected to the reduction motor 33, and the push rake tooth blades are provided with rotation support through the cylindrical bracket 61.

[0025] The seal includes a support sleeve 63 and a labyrinth sealing ring 64. The support sleeve 63 is sleeved on the upper port of the support cylinder. The labyrinth sealing ring 64 is sleeved in the support sleeve 63, and an auxiliary sealing ring 65 is sleeved below the sealing ring. The labyrinth sealing ring 64 and the auxiliary sealing ring 65 are used to seal the main shaft 32 and the tank body 1 to prevent material leakage from the shaft hole and affect the air tightness of the tank body 1, thereby ensuring the pressurization and fluidization effects of the tank body 1.

[0026] A water cooling channel 71 is spirally provided inside the side wall of the cylinder bracket 61. A water inlet joint 72 connected to the water cooling channel 71 is provided at the upper part of the cylinder bracket 61, and a water outlet joint 73 connected to the water cooling channel 71 is provided at the lower part. The sealing ring in the cylinder bracket 61 will generate frictional high temperature in the process of rotating relative to the main shaft 32 to maintain the seal. The sealing effect of the sealing ring working in a high temperature state will be weakened and the service life will be reduced. The water cooling channel 71 circulates and cools the cylinder bracket 61 to effectively solve the problem of high temperature operation of the sealing ring.

Claims

1. A high temperature and high pressure pneumatic conveying material dispensing tank, characterized by: It includes a vertically arranged tank body, a conveying pipeline and a pushing tooth rake. A sleeve hole is radially arranged from the middle and lower side wall of the tank body. The conveying pipeline is inserted into the sleeve hole and passes through the tank body. A reverse feed pipe is radially arranged downward in the middle of the conveying pipeline. The reverse feed pipe is coaxially arranged with the tank body. A conical shell is provided at the lower port of the tank body, and a feed port is provided at the upper port. A feed valve is provided at the feed port. The pushing tooth rake is installed below the reverse feed pipe and facing the reverse feed pipe. A reduction motor is installed on the bottom plate of the tank body through a bracket. The reduction motor is connected to the main shaft of the pushing tooth rake.

2. A high temperature and high pressure pneumatic conveying material delivery tank according to claim 1, characterized in that: The sealing member is a conical shell connected to the lower port of the tank body through a flange, a fluidizing plate is arranged at the upper port of the conical shell, air holes are densely arranged on the fluidizing plate, and a fluidizing air pipe is connected to the bottom of the conical shell.

3. A high temperature and high pressure pneumatic conveying material delivery tank according to claim 2, characterized in that: The fluidizing gas pipe is connected to the air inlet end of the conveying pipeline, and a gas valve is arranged on the fluidizing gas pipe.

4. A high temperature and high pressure pneumatic conveying material delivery tank according to claim 1, characterized in that: The upper part of the tank body is connected with a pressurizing pipe, which is connected with the air inlet end of the conveying pipeline, and an air valve is arranged on the pressurizing pipe.

5. A high temperature and high pressure pneumatic conveying material delivery tank according to claim 1, characterized in that: The bracket is a cylindrical bracket, the upper end of the cylindrical bracket is provided with a seal, the middle and lower parts are provided with bearings, the reduction motor is installed at the lower end of the cylindrical bracket, and the main shaft of the push tooth rake passes through the seal and the bearing and is connected to the reduction motor.

6. A high temperature and high pressure pneumatic conveying material delivery tank according to claim 5, characterized in that: The sealing element comprises a supporting sleeve and a labyrinth sealing ring. The supporting sleeve is sleeved on the upper port of the supporting cylinder, the labyrinth sealing ring is sleeved in the supporting sleeve, and an auxiliary sealing ring is sleeved below the sealing ring.

7. A high temperature and high pressure pneumatic conveying material delivery tank according to claim 5, characterized in that: A water cooling channel is spirally arranged inside the side wall of the cylinder bracket, a water inlet joint connected to the water cooling channel is arranged at the upper part of the cylinder bracket, and a water outlet joint connected to the water cooling channel is arranged at the lower part.

8. The high-temperature and high-pressure pneumatic conveying material delivery tank according to claim 1 is characterized in that: A pressure relief valve and a pressure gauge are installed on the upper part of the tank body.

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