Upper discharging sending tank of conical fluidization disc structure

Abstract

The utility model provides an upper discharging sending tank with a conical fluidization disc structure, which relates to a sending tank of a pneumatic conveying system and comprises a sending tank body, a material inlet and a material outlet, the material inlet and the material outlet are arranged at the top of the sending tank body, and the material outlet extends to the bottom of the sending tank body through a group of conveying pipelines. A group of fluidization discs are mounted at the bottom of the sending tank body, each fluidization disc is in an inverted cone shape, a round hole is formed in the bottom end of each fluidization disc and connected with a gas conveying pipeline, a feeding port in the bottom end of the conveying pipeline extends to the position above the round hole, and a fluidizer is further mounted in the hole in the cone surface of each fluidization disc; according to the utility model, the positions of the fluidization disc and the compressed air pipeline of the upper discharge sending tank are optimized, so that the efficiency of materials entering the conveying pipeline is improved.

Description

Technical Field

[0001] The utility model relates to a sending tank of a pneumatic conveying system, in particular to an upper discharging sending tank with a conical fluidized disc structure. Background Art

[0002] Pneumatic conveying system uses airflow as the conveying medium to transport bulk materials from one or more sources to one or more destinations. Compared with mechanical conveying systems such as belt conveyors, screw conveyors, vibrating conveyors, and traction conveyors, pneumatic conveying systems are usually a more suitable method for transporting powder and granular materials, with the following characteristics:

[0003] (1) The pneumatic conveying system is easy to operate and relatively cheap;

[0004] (2) The pneumatic conveying system is fully enclosed, so it is cleaner, more environmentally friendly, and easier to maintain.

[0005] (3) Pneumatic conveying systems are flexible in terms of modification and expansion, and can transport materials to almost anywhere that the pipeline can reach.

[0006] Pneumatic conveying can generally be divided into two types: dilute phase and dense phase:

[0007] Dilute phase pneumatic conveying uses a relatively large amount of air to convey a relatively small amount of material. The material is suspended in the air and flows at high speed. In order to keep the material suspended, it is necessary to maintain a sufficient conveying air speed. For most materials, this speed is about 10-30m / s, that is, dilute phase pneumatic conveying is a process of pushing or pulling the material suspended in the air from one position to another by maintaining a sufficient air flow speed. It is essentially a continuous process with the characteristics of high speed, low pressure, and low material-to-air ratio. Dilute phase pneumatic conveying can be divided into positive pressure conveying and negative pressure conveying according to the pressure in the conveying pipeline: negative pressure conveying is used to convey materials from multiple silos to one target silo; positive pressure conveying is used to convey materials from one silo to multiple target silos; the typical feature of the dilute phase pneumatic conveying system is that there is an "air lock" between the silo and the conveying pipeline, and the material is quantitatively delivered into the conveying pipeline through the rotation of the air lock, and the air in the pipeline is prevented from entering the silo.

[0008] The dense phase pneumatic conveying system relies on air pulses to force a section of material from one location to another. It is essentially an intermittent process with the characteristics of low speed, high pressure and high material-to-air ratio. The sending tank of the dense phase pneumatic conveying system is a pressure vessel, which is generally divided into two types: upper discharge and lower discharge. The differences in the structure and discharge form of the two types of sending tanks determine that the flow form and shape of the material in the silo pump are different, resulting in different feeding characteristics. For powders with better fluidization performance, it is recommended to use an upper discharge sending tank, which is characterized by good conveying stability and continuity; for powders with poor fluidization performance, only a lower discharge sending tank can be selected.

[0009] In the feed industry, the materials for pneumatic conveying of feed premixes are mainly grains with low density and viscosity, such as corn and barley. Therefore, they are very suitable for positive pressure dilute phase conveying and top discharge dense phase conveying.

[0010] However, dilute phase conveying has high operating costs; specifically, high-speed moving materials will cause rapid wear of the conveying pipeline, and the material and air need to be accelerated to very high speeds.

[0011] If dense phase conveying with top discharge is adopted, the pressure in the sending tank is high and the pressure in the conveying pipeline is low during transportation; the material fluidized by compressed air is squeezed into the conveying pipeline due to the pressure difference and transported to the target silo. The fluidization speed of the material has a great influence on the conveying efficiency and has an optimal value. Too high or too low speed will directly affect the efficiency of the material entering the conveying pipeline. Utility Model Content

[0012] In order to solve the above technical problems, the purpose of the utility model is to provide an upper discharge sending tank with a conical fluidizing disk structure, which is used to optimize the position of the fluidizing disk and the compressed air pipeline of the upper discharge sending tank, so as to improve the efficiency of materials entering the conveying pipeline.

[0013] The utility model provides the following technical solutions:

[0014] The invention relates to an upper discharging sending tank with a conical fluidizing disk structure, comprising a sending tank body, a material inlet and a material outlet arranged on the top of the sending tank body, the material outlet extending to the bottom of the sending tank body through a group of conveying pipes, and a group of fluidizing disks are installed at the bottom of the sending tank body, the fluidizing disks are in the shape of an inverted cone, and the fluidized materials tend to be concentrated to the bottom of the inverted cone under the action of gravity, so that the materials can enter the material conveying pipe more easily, a circular hole is opened at the bottom of the fluidizing disk and connected to the conveying air pipe, and the bottom feed port of the conveying pipe extends above the circular hole, and after the conveying air pipe is blown, a negative pressure area can be formed near the feed port of the material conveying pipe, and the pressure difference between the area and the material sending tank is greater than the pressure difference of the traditional structural design, so the materials can enter the material conveying pipe more easily, and a fluidizer is also installed in the opening on the surface of the conical body of the fluidizing disk, and the fluidizer is a standard part, which is the same as the fluidizer installed in the traditional flat-bottomed fluidizing disk, and will not be described in detail here;

[0015] At this point, the compressed air enters the sending tank body through the fluidizer on the fluidizing disk, and the airflow ejected from the fluidizer blows up the material in the sending tank body, thereby increasing the fluidity of the material, increasing the air-to-material ratio during transportation, and improving the transportation efficiency. The pressure in the tank will also rise accordingly, and at the same time, the conveying air pipeline is cooperated with to blow air directly into the material conveying pipeline to form a stable and continuous airflow. Under the jet action of the airflow, a negative pressure area is formed near the feed port of the material conveying pipeline. The pressure difference between this area and the material sending tank is greater than the traditional design pressure difference, and the material is easier to enter the material conveying pipeline, so as to achieve the purpose of optimizing the position of the fluidizing disk and the compressed air pipeline of the upper discharge sending tank and significantly improving the efficiency of the material entering the conveying pipeline.

[0016] Preferably, the circular hole is the gas outlet of the gas delivery pipeline, there is a gap between the gas outlet and the feed inlet of the delivery pipeline and they are arranged face to face, and the diameter of the feed inlet of the delivery pipeline is larger than the diameter of the gas outlet;

[0017] At this point, the conveying gas pipeline can directly blow air into the material conveying pipeline, which can further ensure that the material can enter the material conveying pipeline more easily.

[0018] Preferably, the bottom of the sending tank body and the outer ring of the fluidizing disk form a buffer space, and a group of fluidizing gas pipes are connected to one side of the bottom. The compressed air transported by the fluidizing gas pipes enters the buffer space and then enters the sending tank body through the fluidizer. The setting of the buffer space can ensure that the airflow can enter multiple groups of fluidizers evenly.

[0019] The beneficial effects of the utility model are:

[0020] The present invention optimizes the positions of the fluidizing plate and the compressed air pipeline of the upper discharge sending tank, thereby significantly improving the efficiency of the material entering the conveying pipeline;

[0021] In the specific design, the fluidizing plate is designed to be an inverted cone, with a circular hole in the middle and connected to the conveying air pipeline; the compressed air in the conveying air pipeline directly enters the sending tank body on the upper part of the fluidizing plate through the hole; the material conveying pipeline feed port and the air outlet of the conveying air pipeline are arranged face to face and keep a certain distance, and the conveying air pipeline directly blows air to the material conveying pipeline, forming a negative pressure area near the material conveying pipeline feed port, and the pressure difference between this area and the sending tank is greater than the traditional design pressure difference, so that the material is easier to enter the material conveying pipeline;

[0022] The fluidizing plate is designed to be conical, and a fluidizer is installed on the circular hole of the conical surface; compressed air enters the space between the fluidizing plate and the bottom of the material dispensing tank body through the fluidizing gas pipeline, and then enters the inner body of the material dispensing tank through the fluidizer on the fluidizing plate. The airflow ejected by the fluidizer blows up the material in the dispensing tank body, thereby increasing the fluidity of the material, increasing the air-to-material ratio during transportation, and improving the transportation efficiency. The pressure in the tank will also rise accordingly, and at the same time, the conveying gas pipeline is cooperated to directly blow air into the material conveying pipeline to form a negative pressure area, so that the material can enter the material conveying pipeline more easily, so as to achieve the purpose of optimizing the position of the fluidizing plate and the compressed air pipeline of the upper discharge sending tank and significantly improving the efficiency of the material entering the conveying pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 It is a structural sectional view of the utility model;

[0025] Figure 2 It is a top view schematic diagram of the bottom structure of the sending tank body;

[0026] Figure 3 It is a schematic diagram of the main view of the bottom structure of the sending tank body and a group of fluidizers therein are enlarged and taken out to illustrate;

[0027] Markings in the figure:

[0028] 1. Sending tank body; 2. Material inlet; 3. Material outlet; 4. Conveying pipeline; 5. Fluidizing plate; 6. Conveying gas pipeline; 7. Fluidizer; 8. Buffer space; 9. Fluidizing gas pipeline. DETAILED DESCRIPTION

[0029] like Figure 1-3As shown, a top-discharging sending tank with a conical fluidized disk structure, in this embodiment, comprises a sending tank body 1, a material inlet 2 and a material outlet 3 arranged at the top of the sending tank body 1, the material outlet 3 extends to the bottom of the sending tank body 1 through a group of conveying pipes 4, and a group of fluidized disks 5 are installed at the bottom of the sending tank body 1. The fluidized disks 5 are in an inverted cone shape. The fluidized materials tend to concentrate toward the bottom of the inverted cone under the action of gravity, so that the materials can enter the material conveying pipe 4 more easily. The bottom of the fluidized disk 5 The circular hole is connected to the conveying gas pipeline 6, and the bottom feed port of the conveying pipeline 4 extends to the top of the circular hole. After the conveying gas pipeline 6 is blown, a negative pressure area can be formed near the feed port of the material conveying pipeline 4. The pressure difference between this area and the material delivery tank is greater than the pressure difference of the traditional structural design. Therefore, the material can enter the material conveying pipeline 4 more easily. A fluidizer 7 is also installed in the opening on the conical surface of the fluidizing disk 5. The fluidizer 7 is a standard part, which is the same as the fluidizer 7 installed in the traditional flat-bottomed fluidizing disk 5, and will not be described in detail here;

[0030] At this point, the compressed air enters the sending tank body 1 through the fluidizer 7 on the fluidizing disk 5, and the airflow ejected from the fluidizer 7 blows up the material in the sending tank body 1, thereby increasing the fluidity of the material, increasing the air-to-material ratio during transportation, and improving the transportation efficiency. The pressure in the tank will also rise accordingly, and at the same time, the conveying air pipeline 6 is cooperated to blow air directly to the material conveying pipeline 4 to form a stable and continuous airflow. Under the jet action of the airflow, a negative pressure area is formed near the feed port of the material conveying pipeline 4. The pressure difference between this area and the material sending tank is greater than the pressure difference of the traditional design structure, making it easier for the material to enter the material conveying pipeline 4, so as to achieve the purpose of optimizing the position of the fluidizing disk 5 and the compressed air pipeline of the upper discharge sending tank and significantly improving the efficiency of the material entering the conveying pipeline 4.

[0031] The circular hole is the gas outlet of the gas delivery pipe 6. There is a gap between the gas outlet and the feed inlet of the delivery pipe 4 and they are arranged face to face. The diameter of the feed inlet of the delivery pipe 4 is larger than the diameter of the gas outlet.

[0032] At this point, the conveying air pipeline 6 can directly blow air into the material conveying pipeline 4 , thereby further ensuring that the material can enter the material conveying pipeline 4 more easily.

[0033] The bottom of the sending tank body 1 and the outer circle of the fluidizing plate 5 form a buffer space 8, and a group of fluidizing gas pipes 9 are connected to one side of the bottom. The compressed air transported by the fluidizing gas pipes 9 enters the buffer space 8 and then enters the sending tank body 1 through the fluidizer 7. The setting of the buffer space 8 can ensure that the airflow can enter multiple groups of fluidizers 7 evenly.

[0034] The working principle of the utility model is:

[0035] Equipment operation process 1: Start preparing for feeding, open the material inlet 2 valve and the exhaust port valve on the top of the sending tank body 1, after the material enters the sending tank body 1, the air in the tank will be discharged through the exhaust port on the top of the sending tank body 1, and part of the air will be discharged through the material inlet 2 on the top of the sending tank body 1. After the feeding is completed, close the material inlet 2 valve and the exhaust port valve on the top of the sending tank body 1;

[0036] Equipment operation process 2: Start preparing for discharge, first open the discharge port valve; then open the stop valves of the conveying gas pipeline 6 and the fluidizing gas pipeline 9, and finally turn on the power system, such as a blower or an air compressor. After turning on the power system, compressed air enters the fluidizing device through the fluidizing gas pipeline 9, and the air will be ejected from the fluidizer 7 installed on the fluidizing disk 5. The ejected airflow will blow up the material in the sending tank body 1, thereby increasing the fluidity of the material, increasing the gas-to-material ratio during transportation, and improving the transportation efficiency. The pressure in the tank will also rise accordingly. At the same time, the conveying gas pipeline 6 blows air directly to the material conveying pipeline 4 to form a stable and continuous airflow. Under the jet action of the airflow, a negative pressure area is formed near the feed port of the material conveying pipeline 4. The pressure difference between this area and the inside of the sending tank is greater than the pressure difference of the traditional design structure, making it easier for the material to enter the material conveying pipeline 4.

[0037] Material cleaning process: After the discharge is completed, the sending tank body 1 needs to be cleaned. As the tank body is emptied, the internal pressure of the tank body will drop. When the pressure drops below the specified value, the fluidizing device starts to work, and the electromagnetic valve is used to control the opening and closing of the pneumatic stop valve at the fluidizing gas pipeline 9. Through continuous opening and closing, the effect of pulse blowing is achieved. The blowing causes the residual material on the inner wall of the tank body to fall down. Finally, the fallen powder tends to concentrate to the bottom of the inverted cone under the action of gravity, so that the material can enter the material conveying pipeline 4 more easily, and finally the sending tank body 1 is self-cleaned, the residual material in the tank body is reduced, and cross contamination of the material in the tank body is avoided.

[0038] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An upper discharge sending tank with a conical fluidized disc structure, characterized in that: The invention comprises a sending tank body (1), a material inlet (2) and a material outlet (3) arranged at the top of the sending tank body (1); the material outlet (3) extends to the bottom of the sending tank body (1) through a group of conveying pipes (4); a group of fluidizing plates (5) are installed at the bottom of the sending tank body (1); the fluidizing plates (5) are in the shape of an inverted cone, and a circular hole is opened at the bottom end thereof to be connected to a conveying gas pipe (6); the feed port at the bottom end of the conveying pipe (4) extends above the circular hole; a fluidizer (7) is also installed in the opening on the cone surface of the fluidizing plate (5).

2. The upper discharge sending tank of the conical fluidized disk structure according to claim 1 is characterized in that: The circular hole is the air outlet of the conveying gas pipeline (6), there is a gap between the air outlet and the feed inlet of the conveying pipeline (4), and they are arranged face to face, and the diameter of the feed inlet of the conveying pipeline (4) is larger than the diameter of the air outlet.

3. The upper discharge sending tank of the conical fluidized disk structure according to claim 1 or 2, characterized in that: The bottom of the sending tank body (1) and the outer ring of the fluidizing plate (5) form a slow-flowing space (8), one side of the bottom of which is connected to a group of fluidizing gas pipelines (9). The compressed air transported by the fluidizing gas pipelines (9) enters the slow-flowing space (8) and then enters the sending tank body (1) via the fluidizer (7).

Images