Pneumatic steady-flow conveying device and system for high-temperature powder

Abstract

The invention provides a high-temperature powder pneumatic steady-flow conveying device which comprises a temporary storage tank used for storing powder, and at least one high-pressure hood is arranged on an inner cavity of the temporary storage tank; the first material conveying pipe is communicated with a discharging opening of the temporary storage tank, one end of the first material conveying pipe is connected with compressed gas, and at least one set of inclined plates used for changing the flow speed and the flow direction of the powder materials so as to prevent the powder materials from collapsing or blocking are arranged in an inner cavity of the first material conveying pipe. The invention further provides a high-temperature powder pneumatic steady-flow conveying system which comprises the high-temperature powder pneumatic steady-flow conveying device and further comprises a second material conveying pipe communicated with the first material conveying pipe. One end of the second material conveying pipe is connected with an air inlet valve, and the other end of the second material conveying pipe is connected with a cyclone separator; and the cyclone separator is also connected with a negative pressure fan. The powder conveying device can effectively prevent powder materials from collapsing and being blocked in the conveying process, the production and maintenance cost is reduced, and the production efficiency and economic benefits are improved.

Description

Technical Field

[0001] The invention relates to the field of powder material transportation, and in particular to a high-temperature powder pneumatic steady-flow transportation device and system. Background Art

[0002] Pneumatic conveying is a technology that uses gas flow to transport solid particles or powder materials. It uses gas pressure or flow rate to push materials to be transported in pipelines and is a specific application of fluidization technology. The pneumatic conveying device has a simple structure and is easy to operate. It can convey materials at different heights and directions to achieve long-distance and high-speed transportation. During the transportation process, it can also perform physical operations such as heating, cooling, drying and airflow classification of materials or certain chemical operations. The pneumatic conveying device belongs to dense phase medium-pressure pneumatic conveying, which is particularly suitable for modern logistics systems that transport particles and powder materials that are not easy to break. Pneumatic conveying technology is widely used in various industries, and has a wide range of applications in industrial fields such as building materials, metallurgy, chemical industry, and environmental protection.

[0003] However, existing pneumatic conveying systems, especially for conveying high-temperature powder materials, often cause leakage, material collapse, blockage, low efficiency and high cost during the conveying process because the conveying device cannot withstand high temperatures or the design structure is unreasonable. Summary of the invention

[0004] In order to solve the problems of leakage, material collapse, blockage, low efficiency and high cost caused by the powder material conveying device in the prior art due to its inability to withstand high temperature or unreasonable design structure, the present invention provides a high-temperature powder pneumatic steady flow conveying device.

[0005] The high-temperature powder pneumatic steady-flow conveying device includes a temporary storage tank for storing powder, at least one high-pressure wind hood is arranged on the inner cavity of the temporary storage tank; a first material conveying pipe connected to the discharge port of the temporary storage tank, one end of the first material conveying pipe is connected to compressed gas for conveying materials transmitted from the temporary storage tank to the first material conveying pipe, the other end of the first material conveying pipe is connected to an external material conveying system, and the inner cavity of the first material conveying pipe is provided with at least one group of inclined plates for changing the flow rate and flow direction of the powder material to prevent the powder material from collapsing or clogging.

[0006] Furthermore, the high-pressure air hood is connected to an external compressed gas for fluidizing the powder in the temporary storage tank and / or heating the powder material.

[0007] Furthermore, the inclined plate includes a first inclined plate and a second inclined plate, the second inclined plate is staggered along the axial direction of the first material conveying pipe and forms an inclination angle with the axial direction of the first material conveying pipe respectively, the first inclined plate and the second inclined plate partially overlap in the axial projection of the first material conveying pipe, and the first inclined plate and the second inclined plate do not overlap in the radial projection of the first material conveying pipe.

[0008] Furthermore, the inclined plates are in multiple groups, and the multiple groups of inclined plates are arranged at equal or unequal intervals along the axial direction of the first material conveying pipe.

[0009] Furthermore, projections of adjacent inclined plates in the axial direction of the first material conveying pipe partially overlap or / and partially do not overlap.

[0010] Furthermore, there are multiple high-pressure hoods, which are equidistantly arranged from and away from the discharge port of the temporary storage tank.

[0011] Furthermore, a flap valve is also arranged on the connecting pipeline between the temporary storage tank and the first material conveying pipe.

[0012] The present invention also provides a high-temperature powder pneumatic steady-flow conveying system, including the high-temperature powder pneumatic steady-flow conveying device described above, and also including a second material conveying pipe, which is connected to the first material conveying pipe; one end of the second material conveying pipe is connected to the air intake valve, and the other end of the second material conveying pipe is connected to the cyclone separator; the cyclone separator is also connected to the negative pressure fan.

[0013] Furthermore, the diameter of a portion of the second material conveying pipe between the first material conveying pipe and the air intake valve is smaller than the diameter of the second material conveying pipe between the first material conveying pipe and the cyclone separator.

[0014] Furthermore, the diameter of the second material conveying pipe at the connection point between the first material conveying pipe and the second material conveying pipe pointing to the air intake valve is smaller than the diameter of the second material conveying pipe between the first material conveying pipe and the cyclone separator.

[0015] Compared with the prior art, the high-temperature powder pneumatic steady-flow conveying device of the present invention can effectively prevent the powder material from collapsing and clogging when discharging by setting at least one high-pressure wind cap in the temporary storage tank for storing the powder. At the same time, by externally connecting high-temperature and high-pressure gas, the powder material can be heated to realize the high-temperature powder material transportation. By setting at least one set of inclined plates on the inner wall of the first material conveying pipe connected to the discharge port of the temporary storage tank to change the flow rate and flow direction of the powder material to prevent the powder material from collapsing, the first material conveying pipe can be effectively prevented from collapsing and clogging when conveying materials, effectively solving the problems of clogging and collapsing in the conveying process of powder materials conveyed by pneumatic devices in the prior art, and the low efficiency and high cost of conveying high-temperature powder materials by mechanical devices in the prior art, and effectively improving economic benefits.

[0016] At the same time, the present invention also provides a high-temperature powder pneumatic steady-flow conveying system, by connecting the first material conveying pipe of the above-mentioned high-temperature powder pneumatic steady-flow conveying device and the second material conveying pipe connected to the cyclone separator to an air intake valve, and connecting a negative pressure fan to the cyclone separator, through the combined effect of the air intake valve external compressed air source and the negative pressure fan, the second material conveying pipe can be effectively prevented from being blocked when conveying materials, further reducing production costs and improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of a high-temperature powder pneumatic steady-flow conveying device provided in an embodiment of the present invention;

[0019] Figure 2 The embodiment of the present invention provides Figure 1 A partial enlarged schematic diagram of

[0020] Figure 3 Schematic diagram of the structure of the first material conveying pipe of the high-temperature powder pneumatic steady-flow conveying device provided in an embodiment of the present invention Figure 1 ;

[0021] Figure 4 Schematic diagram of the structure of the first material conveying pipe of the high-temperature powder pneumatic steady-flow conveying device provided in an embodiment of the present invention Figure 2 ;

[0022] Figure 5 A schematic structural diagram of a high-temperature powder pneumatic steady-flow conveying system provided in an embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 1. Temporary storage tank; 2. High-pressure air hood; 3. First material conveying pipe; 4. Inclined plate; 5. Discharge port; 6. Connecting pipeline; 7. Flap valve; 8. Second material conveying pipe; 9. Inlet valve; 10. Cyclone separator; 11. Negative pressure fan; 12. Pipeline; 13. Pneumatic valve. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] As attached Figure 1 As shown, the high-temperature powder pneumatic steady flow conveying device of the present invention includes a temporary storage tank 1 for storing powder. The shape and material of the temporary storage tank 1 are not limited, and can meet the sealing requirements; meet the pressure parameters for conveying the stored powder materials; and meet the corrosiveness of the stored powder materials (if any). At least one high-pressure hood 2 is set on the inner cavity of the temporary storage tank 1. The high-pressure hood 2 is externally connected to compressed gas. By externally connected compressed gas and releasing it to the inner cavity of the temporary storage tank 1 through the high-pressure hood 2, pressure is applied to the powder material in the temporary storage tank 1 and it flows; the powder material in the temporary storage tank 1 is pushed to move toward the first material conveying pipe 3 connected to the discharge port of the temporary storage tank 1. Compressed gas for conveying materials from the temporary storage tank 1 to the first material conveying pipe 3 is connected at one end of the first material conveying pipe 1, and a material conveying system is externally connected at the other end of the first material conveying pipe 3. Since the powder material will rub against the pipe wall when being conveyed in the conveying pipe, the conveying force on the powder material will be greatly reduced, and even wall hanging, material collapse, and blockage may occur. Therefore, at least one set of inclined plates 4 for changing the flow rate and flow direction of the powder material and preventing the powder material from collapsing is arranged on the inner wall of the first material conveying pipe 3 .

[0030] The present invention arranges a high-pressure air hood 2 in the temporary storage tank 1 and an inclined plate 4 on the inner wall of the first material conveying pipe 3. When the powder material is conveyed, the high-pressure air hood 2 releases compressed gas to exert pressure on the powder material to make the powder material flow, thereby effectively avoiding the powder material from being blocked in the temporary storage tank 1. At the same time, the inclined plate 4 is arranged on the inner wall of the first material conveying pipe 3, which can effectively change the flow velocity and flow direction of the powder material flow, thereby realizing the control of the powder material flow rate, so that the powder material will not move only along the axial direction of the first material conveying pipe 3, and the pressure applied when the powder material flows is changed, thereby effectively avoiding the powder material from hanging on the wall, collapsing, and being blocked. At the same time, it also solves the problem of low efficiency and high cost when high-temperature materials are mechanically conveyed in the prior art, thereby effectively improving the economic benefits of production.

[0031] When it is necessary to heat the powder material being transported, the high-pressure air cap 2 is connected to a compressed gas of not less than 200°C, so that the powder material can be fluidized and heated at the same time, and the flow rate of the powder material can be controlled. If it is not necessary to heat the powder material, the low-temperature compressed gas can be directly connected to fluidize the powder material and control the flow rate of the powder material.

[0032] As attached Figure 1 , Attachment Figure 3 , Attachment Figure 4As shown, the inclined plate 4 includes a first inclined plate 41 and a second inclined plate 42. The first inclined plate 41 and the second inclined plate 42 are staggered along the axial direction of the first material conveying pipe 3, and the first inclined plate 41 and the second inclined plate 42 respectively form an inclination angle with the axial direction of the first material conveying pipe 3. The first inclined plate 41 and the second inclined plate 42 partially overlap in the axial projection of the first material conveying pipe 3, and the first inclined plate 41 and the second inclined plate 42 do not overlap in the radial projection of the first material conveying pipe 3. In specific implementation, the first inclined plate 41 and the second inclined plate 42 are arranged on both sides of the axial direction of the first material conveying pipe 3, and a through hole slightly larger than the cross-section of the first inclined plate 41 and the second inclined plate 42 is opened on the tube wall of the first material conveying pipe 3. The first inclined plate 41 and the second inclined plate 42 are extended from the through hole of the first material conveying pipe 3 into the inner cavity of the first material conveying pipe 3, and the extended ends of the first inclined plate 41 and the second inclined plate 42 are abutted against the inner wall on the opposite side of the through hole, and the first inclined plate 41 and the second inclined plate 42 are welded and fixed outside the tube wall on the through hole side of the first material conveying pipe 3. In order to avoid the existence of a gap between the first inclined plate 41 and the second inclined plate 42 and the inner wall of the first material conveying pipe 3, the powder material will remain in the gap when conveying the powder material, causing the contamination of the conveyed different powder materials and the deterioration of the residue, etc., in the specific implementation, the shape of the first inclined plate 41 and the second inclined plate 42 extending end needs to be processed according to the shape of the inner wall of the first material conveying pipe 3, so that the shape of the first inclined plate 41 and the second inclined plate 42 extending end is highly matched with the shape of the inner wall of the first material conveying pipe 3, and the gap between the first inclined plate 41 and the second inclined plate 42 extending end and the inner wall of the first material conveying pipe 3 is effectively eliminated. In addition, the inclination angle of the first inclined plate 41, the second inclined plate 42 and the axial direction of the first material conveying pipe 3 can be adjusted as needed, and the range of the inclination angle can be selected from 10° to 80°, and the optimized range of the inclination angle can be selected from 20° to 70°; the range of the further optimized inclination angle can be selected from 30° to 60°; the range of the further optimized inclination angle can be selected from 40° to 50°.

[0033] As attached Figure 3 , Attachment Figure 4 As shown, in a certain embodiment, there are multiple groups of inclined plates 4, and the multiple groups of inclined plates 4 are arranged at equal or unequal intervals along the axial direction of the first material conveying pipe 3. According to actual needs, the inclined plates 4 can be arranged at equal intervals along the axial direction of the first material conveying pipe 3, or multiple groups can be arranged at unequal intervals along the axial direction of the first material conveying pipe 3, or they can be arranged separately at the head and the end, or they can be arranged at equal intervals at the head and the end and at a large interval in the middle.

[0034] In addition, the projections of adjacent inclined plates 4 in the axial direction of the first material conveying pipe 3 partially overlap or / and partially do not overlap. In a specific implementation, the sizes of adjacent adjacent inclined plates 4 (i.e., the first inclined plate 41 and the second inclined plate 42) can be the same or different. When the spacing is large when the adjacent inclined plates 4 are arranged at equal intervals, the projections of the adjacent inclined plates 4 in the axial direction of the first material conveying pipe 3 do not overlap; when the adjacent inclined plates 4 are arranged at equal intervals and the spacing is small, the projections of the adjacent inclined plates 4 in the axial direction of the first material conveying pipe 3 overlap; it is also possible that the projections of some adjacent inclined plates 4 in the axial direction of the first material conveying pipe 3 do not overlap and the projections of some adjacent inclined plates 4 in the axial direction of the first material conveying pipe 3 overlap.

[0035] In one embodiment, as shown in the attached Figure 1 , Attachment Figure 2 As shown, there are multiple high-pressure air hoods 2, which are equidistantly arranged from the discharge port 5 of the temporary storage tank 1 and away from the discharge port 5 of the temporary storage tank 1; the input ends of the multiple high-pressure air hoods 2 can be connected to a common compressed air source or a compressed high-temperature air source; or the input ends of the multiple high-pressure air hoods 2 can be connected to separate compressed air sources or compressed high-temperature air sources. Among them, the high-pressure air hood 2 at the discharge port 5 is mainly used to fluidize the powder material and control the flow rate of the powder material, and the other high-pressure air hoods 2 are mainly used to fluidize the powder material to further improve the fluidity of the powder material. When the powder material needs to be heated, a compressed gas of not less than 200°C can be connected externally; if heating is not required, the compressed gas can be directly connected externally.

[0036] In one embodiment, as shown in the attached Figure 1 As shown, a flap valve 7 is further provided on the connecting pipeline 6 between the temporary storage tank 1 and the first material conveying pipe 3. The flap valve 7 realizes a single-way control from the inside to the outside of the temporary storage tank 1, and the powder material can only flow from the inside to the outside of the temporary storage tank 1; it effectively avoids and prevents the logistics and airflow from flowing to the inside of the temporary storage tank 1 when the pressure in the first conveying pipe 3 is too high, and prevents impurities such as water vapor from entering the temporary storage tank 1 to contaminate the powder material.

[0037] As attached Figure 5 As shown, the high-temperature powder pneumatic steady-flow conveying system of the present invention includes the above-mentioned high-temperature powder pneumatic steady-flow conveying device, and also includes a second material conveying pipe 8, which is connected to the first material conveying pipe 3; one end of the second material conveying pipe 8 is connected to the air intake valve 9, and the other end of the second material conveying pipe 8 is connected to the cyclone separator 10; the cyclone separator 10 is also connected to the negative pressure wind machine 11. By adjusting the air intake valve 9 and the negative pressure wind 11, it is ensured that the powder material conveyed from the first material conveying pipe 3 of the high-temperature powder pneumatic steady-flow conveying device is not collapsed and blocked when being transmitted in the second material conveying pipe 8.

[0038] In order to further improve the powder material transmission effect, the diameter of the pipeline 12 of the second material conveying pipe 8 between the first material conveying pipe 3 and the air inlet valve 9 is set to be smaller than the diameter of the second material conveying pipe 8 between the first material conveying pipe 3 and the cyclone separator 10, so that the pressure of the air flow increases when it flows out of the part of the pipeline 12, so as to better realize the transmission of the powder material and reduce energy consumption. The pipeline 12 can be the entire pipeline of the second material conveying pipe 8 between the first material conveying pipe 3 and the air inlet valve 9, or it can be a part of the pipeline of the second material conveying pipe 8 between the first material conveying pipe 3 and the air inlet valve 9.

[0039] In order to further optimize the conveying effect of the second material conveying pipe 8, the diameter of the part of the pipeline 12 of the second material conveying pipe 8 pointing to the direction of the air intake valve 9 at the connection between the first material conveying pipe 3 and the second material conveying pipe 8 is set to be smaller than the diameter of the second material conveying pipe 8 between the first material conveying pipe 3 and the cyclone separator 10. That is, the pipeline 12 is set close to the outside of the first material conveying pipe 3, and only the part of the second material conveying pipe 8 between the first material conveying pipe 3 and the air intake valve 9 is set to be the pipeline 12 with a smaller diameter.

[0040] The working process of the high-temperature powder pneumatic steady-flow conveying system of the present invention is as follows: in the initial state, except for the air inlet valve 9 which is in the open state, the other valves are in the closed state. When it is necessary to convey high-temperature materials, the negative pressure fan 11 is turned on to put the system in a negative pressure state, and the pneumatic valve 13 is turned on to put the first material conveying pipe 3 in a positive pressure state. After the system is stable, the high-temperature compressed gas connected to the high-pressure air cap 2 is turned on (if the material does not need to be heated, the compressed gas can be connected separately to the outside), so that the high-temperature powder material in the temporary storage tank 1 enters the first material conveying pipe 3 through the connecting pipeline 6. The high-temperature compressed gas pressure in the high-pressure air cap 2 and the pneumatic valve 13, as well as the inclined block 4 structure of the first material conveying pipe 3 can effectively prevent the first material conveying pipe 3 from being blocked by materials. After the high-temperature material enters the second material conveying pipe 8, the motor frequency of the air inlet valve 9 and the negative pressure fan 11 is adjusted to adjust the pressure drop inside the second material conveying pipe 8, and the structure of the pipeline 12 is combined to prevent the collapse of materials inside the second material conveying pipe 8 and thus blockage.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-temperature powder pneumatic steady-flow conveying device, characterized in that: It comprises a temporary storage tank for storing powder, at least one high-pressure hood is arranged on the inner cavity of the temporary storage tank; a first material conveying pipe connected to the discharge port of the temporary storage tank, one end of the first material conveying pipe is connected to the compressed gas for conveying the material transmitted from the temporary storage tank to the first material conveying pipe, the other end of the first material conveying pipe is connected to the external material conveying system, and the inner cavity of the first material conveying pipe is provided with at least one group of inclined plates for changing the flow rate and flow direction of the powder material to prevent the powder material from collapsing or clogging.

2. The high-temperature powder pneumatic steady-flow conveying device according to claim 1, characterized in that: The high-pressure air cap is connected to an external compressed gas to fluidize the powder material in the temporary storage tank and / or to increase the temperature of the powder material.

3. The high-temperature powder pneumatic steady-flow conveying device according to claim 1, characterized in that: The inclined plate includes a first inclined plate and a second inclined plate, the first inclined plate and the second inclined plate are staggered along the axial direction of the first material conveying pipe and form an inclination angle with the axial direction of the first material conveying pipe respectively, the first inclined plate and the second inclined plate partially overlap in the axial projection of the first material conveying pipe, and the first inclined plate and the second inclined plate do not overlap in the radial projection of the first material conveying pipe.

4. The high-temperature powder pneumatic steady-flow conveying device according to claim 3, characterized in that: There are multiple groups of inclined plates, and the multiple groups of inclined plates are arranged at equal intervals or / and unequal intervals along the axial direction of the first material conveying pipe.

5. The high-temperature powder pneumatic steady-flow conveying device according to claim 4, characterized in that: The projections of adjacent inclined plates in the axial direction of the first material conveying pipe partially overlap or / and partially do not overlap.

6. The high-temperature powder pneumatic steady-flow conveying device according to any one of claims 1 to 5, characterized in that: There are multiple high-pressure hoods, which are equidistantly arranged from and away from the discharge port of the temporary storage tank.

7. The high-temperature powder pneumatic steady-flow conveying device according to any one of claims 1 to 5, characterized in that: A flap valve is also arranged on the connecting pipeline between the temporary storage tank and the first material conveying pipe.

8. High temperature powder pneumatic steady flow conveying system, characterized by: It includes the high-temperature powder pneumatic steady-flow conveying device as described in any one of claims 1 to 7, and also includes a second material conveying pipe, which is connected to the first material conveying pipe; one end of the second material conveying pipe is connected to the air intake valve, and the other end of the second material conveying pipe is connected to the cyclone separator; the cyclone separator is also connected to the negative pressure fan.

9. The high-temperature powder pneumatic steady-flow conveying system according to claim 8, characterized in that: The diameter of the second material conveying pipe between the first material conveying pipe and the air intake valve is smaller than the diameter of the second material conveying pipe between the first material conveying pipe and the cyclone separator.

10. The high-temperature powder pneumatic steady-flow conveying system according to claim 9, characterized in that: The diameter of the second material conveying pipe at the connection point between the first material conveying pipe and the second material conveying pipe pointing to the air intake valve is smaller than the diameter of the second material conveying pipe between the first material conveying pipe and the cyclone separator.

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