Powder drying and conveying system

Abstract

The utility model discloses a powder drying and conveying system which comprises a plurality of drying tanks, a powder conveying pipe, a storage tank, a nitrogen conveying device and a nitrogen conveying pipe, a stirring paddle is arranged in each drying tank, a nitrogen input connector is arranged at the lower end of each drying tank, the output ends of the plurality of drying tanks are respectively communicated with the powder conveying pipe, and the nitrogen conveying pipe is communicated with the storage tank. The output end of the powder conveying pipe is communicated with the storage tank, the conveying end of the nitrogen conveying device is communicated with the nitrogen conveying pipe, the nitrogen conveying pipe is communicated with the powder conveying pipe, and the nitrogen conveying device conveys nitrogen to the drying tank and the powder conveying pipe to enable the drying tank and the powder conveying pipe to keep positive pressure. And the vacuum feeding machine can keep negative pressure in the storage tank. Powder in the drying tank can be evenly heated, the drying effect is good, the powder is not prone to being accumulated and blocked, the powder conveying efficiency is high, and noise is low during conveying.

Description

Technical Field

[0001] The utility model belongs to the field of powder processing equipment, and in particular relates to a powder drying and conveying system. Background Art

[0002] In the processing industries of chemical raw materials, polymers and plastic products, the key to the drying and conveying of powdered or granular materials is to ensure that the powder can be dried quickly and transported stably and efficiently to the next process according to the production process and keep the powder dry. The current method of drying powder is drying in a drying room. The powder is put into a container and then transferred to the drying room for drying. The powder is not stirred, the drying efficiency is low, and manual operation is required. The conveying is manual powder transfer, plate chain conveying, and blower blowing. Among them, manual powder transfer is inefficient and dusty. Although plate chain conveying is efficient, it is dusty and costly. Blower blowing is noisy and energy-consuming. Powder easily accumulates in the pipeline, and the pipeline needs to be cleaned regularly. The conveying speed is not fast. Therefore, in order to avoid the shortcomings of the existing technology, it is necessary to improve the existing technology. Utility Model Content

[0003] The utility model aims to provide a powder drying and conveying system, which can make the powder inside the drying tank evenly heated, has a good drying effect, is not easy to accumulate and clog the powder, has high powder conveying efficiency, and has low noise during conveying.

[0004] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0005] A powder drying and conveying system comprises a drying tank, a powder conveying pipe, a storage tank, a nitrogen conveying device and a nitrogen conveying pipe, wherein the drying tank is provided with several, a stirring paddle is provided inside the drying tank, a nitrogen input connector is provided at the lower end of the drying tank, output ends of the several drying tanks are respectively connected to the powder conveying pipe, the output end of the powder conveying pipe is connected to the storage tank, the conveying end of the nitrogen conveying device is connected to the nitrogen conveying pipe, the nitrogen conveying pipe is connected to the powder conveying pipe, the nitrogen conveying pipe is bypassed and connected to a first branch and a second branch, the first branch is connected to the nitrogen input connector, and the second branch is connected to the output end of the drying tank, the nitrogen conveying device conveys nitrogen to the drying tank and the powder conveying pipe to maintain a positive pressure in the drying tank and the powder conveying pipe, and a vacuum loader is provided on the storage tank, and the vacuum loader can maintain a negative pressure inside the storage tank.

[0006] As a preferred solution of the above-mentioned powder drying and conveying system, a first nitrogen valve is provided on the first branch line, and a second nitrogen valve is provided on the second branch line.

[0007] As a preferred solution of the above-mentioned powder drying and conveying system, an exhaust filter is provided at the upper end of the drying tank, and the exhaust filter is connected to the external environment.

[0008] As a preferred solution of the above-mentioned powder drying and conveying system, one-way valves are provided at the output end of the first nitrogen valve and the output end of the second nitrogen valve.

[0009] As a preferred solution of the above-mentioned powder drying and conveying system, the output of the drying tank is connected to a discharge valve, and the output end of the discharge valve is communicated with the powder conveying pipe.

[0010] As a preferred solution of the above-mentioned powder drying and conveying system, the nitrogen conveying pipe is connected to a third branch in a bypass manner, a third nitrogen valve is provided on the third branch, a one-way valve is provided at the output end of the third nitrogen valve, and the output end of the third branch is connected to the discharge valve.

[0011] As a preferred solution of the above-mentioned powder drying and conveying system, the nitrogen conveying pipe is connected to a fourth branch in a bypass manner, and the fourth branch is connected to the initial end of the powder conveying pipe.

[0012] As a preferred solution of the above-mentioned powder drying and conveying system, a fourth nitrogen valve is provided at the end of the nitrogen conveying pipe, and a plurality of connecting pipes connected to the powder conveying pipe are provided at the output end of the fourth nitrogen valve.

[0013] The powder drying and conveying system provided by the present invention has the following beneficial effects compared with the prior art:

[0014] The drying tank of the utility model dries the powder in the tank, and the output ends of the plurality of drying tanks are respectively connected to the powder conveying pipes, and the output ends of the powder conveying pipes are connected to the storage tank, and the dried powder is conveyed to the storage tank through the powder conveying pipes, so that the transportation and conveying efficiency of the powder is high; a stirring paddle is provided inside the drying tank to stir the powder during the drying process, so that the powder is stirred from bottom to top and radially disorderly in the drying tank, so that the powder in the tank is not accumulated and the effect of uniform and rapid heating is achieved; the conveying end of the nitrogen conveying device is connected to the nitrogen conveying pipe, and the nitrogen conveying device conveys nitrogen to the drying tank and the powder conveying pipe through the nitrogen conveying pipe, the first branch and the second branch, so that The drying tank and the powder conveying pipe are kept at positive pressure, and a vacuum loader is installed on the storage tank to keep the internal pressure of the storage tank at negative pressure. The powder dried in the drying tank is conveyed to the storage tank by the positive and negative air pressure, avoiding the use of a blower to cause loud noise. The powder is conveyed from the positive pressure drying tank to the negative pressure storage tank, forming a drainage effect, and the conveying is stable and smooth. The powder is transported by air pressure to achieve high powder conveying efficiency and low noise during conveying. Nitrogen is introduced to blow up the powder to keep the powder in a moving state in the drying tank and the powder conveying pipe, so that the powder is not easy to accumulate and clog the drying tank and the powder conveying pipe. In addition, nitrogen is introduced into the drying tank to carry the evaporated moisture away from the powder, so that the drying effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments are briefly introduced below.

[0016] Figure 1 It is a schematic diagram of the powder drying and conveying system of the present utility model.

[0017] Markings in the figure:

[0018] 100, drying tank; 110, exhaust filter; 120, stirring paddle; 130, nitrogen input connector; 140, discharge valve; 200, nitrogen delivery device; 300, nitrogen delivery pipe; 310, first branch; 311, first nitrogen valve; 320, second branch; 321, second nitrogen valve; 330, third branch; 331, third nitrogen valve; 340, fourth nitrogen valve; 350, connecting pipe; 360, one-way valve; 370, fourth branch; 400, storage tank; 410, vacuum loader; 500, powder delivery pipe. DETAILED DESCRIPTION

[0019] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0020] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They 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 operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0021] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0022] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0023] Please also refer to Figure 1 Now, the powder drying and conveying system provided by the embodiment of the present utility model is described.

[0024] like Figure 1 As shown, the powder drying and conveying system of the present invention includes a drying tank 100, a powder conveying pipe 500, a storage tank 400, a nitrogen conveying device 200 and a nitrogen conveying pipe 300. The drying tank 100 is provided with several, and a stirring paddle 120 is provided inside the drying tank 100. A nitrogen input connector 130 is provided at the lower end of the drying tank 100. The output ends of the plurality of drying tanks 100 are respectively connected to the powder conveying pipe 500, and the output end of the powder conveying pipe 500 is connected to the storage tank 400. The conveying end of the nitrogen conveying device 200 is connected to the nitrogen conveying pipe 300. The nitrogen delivery pipe 300 is connected to the powder delivery pipe 500. The nitrogen delivery pipe 300 is connected to a first branch 310 and a second branch 320 in a bypass manner. The first branch 310 is connected to the nitrogen input connector 130, and the second branch 320 is connected to the output end of the drying tank 100. The nitrogen delivery device 200 delivers nitrogen to the drying tank 100 and the powder delivery pipe 500 to maintain a positive pressure in the drying tank 100 and the powder delivery pipe 500. A vacuum loader 410 is provided on the storage tank 400, and the vacuum loader 410 can maintain a negative pressure inside the storage tank 400.

[0025] Among them, the stirring paddle 120 is composed of a group of variable diameter inner spiral ribbons, two groups of symmetrical variable diameter outer spiral ribbons and multiple groups of cross bars. The lower end of the drying tank 100 is conical and is used to gather the powder so that the powder is transported from the lower end output port of the drying tank 100 to the powder conveying pipe 500. The spiral diameters of the variable diameter inner spiral ribbon and the variable diameter outer spiral ribbon increase from small to large from bottom to top from the conical lower end of the drying tank 100, and become equal in diameter when the tank body of the drying tank 100 changes from a conical shape to a straight cylindrical shape. When the stirring paddle 120 rotates, the cross bar flips the material. The stirring paddle 120 is driven by the motor to rotate clockwise or counterclockwise to fully stir the powder in the drying tank 100.

[0026] The drying tank 100 heats and dries the powder. The powder accumulates at the lower end of the drying tank 100 due to gravity. The powder inside the drying tank 100 is stirred from bottom to top and radially disorderly under the stirring action of the stirring paddle 120, so that the powder is fully and evenly heated inside the drying tank 100.

[0027] The nitrogen input connector 130 is provided at the lower end of the drying tank 100 , and nitrogen is introduced from the lower end of the drying tank 100 so that the nitrogen can carry away evaporated water from the bottom to the top during its rising process.

[0028] Illustratively, a first nitrogen valve 311 is provided on the first branch 310, and a second nitrogen valve 321 is provided on the second branch 320. The nitrogen delivery of the first branch 310 and the second branch 320 is controlled by starting and closing the first nitrogen valve 311 and the second nitrogen valve 321. When the first nitrogen valve 311 is closed and the second nitrogen valve 321 is opened, nitrogen can be delivered only to the output end of the drying tank 100 to maintain a positive pressure at the output end of the drying tank 100. Nitrogen can also be delivered from the output end of the drying tank 100 to the powder conveying pipe 500 to blow up the powder and keep the powder in motion, so that it will not accumulate and block the powder conveying pipe 500.

[0029] Illustratively, an exhaust filter 110 is provided at the upper end of the drying tank 100, and the exhaust filter 110 is connected to the external environment. The nitrogen delivery device 200 delivers nitrogen to the drying tank 100 through the first branch 310 and the nitrogen input connector 130. The drying tank 100 is heated by a medium such as hot oil, and the nitrogen carries the evaporated moisture away from the powder from the bottom to the top. After the moisture evaporates and separates from the powder, it is discharged from the exhaust filter 110, so that the powder remains dry after drying.

[0030] Exemplarily, one-way valves 360 are provided at the output ends of the first nitrogen valve 311 and the second nitrogen valve 321 , and the one-way valves 360 prevent nitrogen from flowing back due to the positive pressure of the drying tank 100 and the powder conveying pipe 500 .

[0031] Illustratively, the output of the drying tank 100 is connected to a discharge valve 140, and the output end of the discharge valve 140 is connected to the powder conveying pipe 500. The discharge valve 140 controls the powder in the drying tank 100 to enter the powder conveying pipe 500. When the powder in the drying tank 100 needs to be conveyed to the powder conveying pipe 500, the discharge valve 140 is opened, and the powder is conveyed from the drying tank 100 to the powder conveying pipe 500 through the discharge valve 140 under the action of gravity.

[0032] Illustratively, the nitrogen delivery pipe 300 is connected to a third branch 330 in a bypass manner. A third nitrogen valve 331 is provided on the third branch 330. A one-way valve 360 ​​is provided at the output end of the third nitrogen valve 331. The output end of the third branch 330 is connected to the discharge valve 140. Powder accumulation is prone to occur during the opening and closing process of the discharge valve 140, resulting in an inability to fully open and close. The nitrogen delivery device 200 delivers nitrogen to the discharge valve 140 through the third branch 330 to blow the powder to prevent powder accumulation at the discharge valve 140.

[0033] Illustratively, the nitrogen delivery pipe 300 is connected to a fourth branch 370 in a bypass manner. The fourth branch 370 is connected to the initial end of the powder delivery pipe 500. Nitrogen is introduced into the initial end of the powder delivery pipe 500 through the fourth branch 370, which not only maintains a positive pressure in the powder delivery pipe 500, but also provides a certain driving force for blowing the powder in the powder delivery pipe 500 so that the powder is delivered to the storage tank 400 along the powder delivery pipe 500.

[0034] Illustratively, a fourth nitrogen valve 340 is provided at the end of the nitrogen delivery pipe 300. The output end of the fourth nitrogen valve 340 is provided with a plurality of connecting pipes 350 connected to the powder delivery pipe 500. The plurality of connecting pipes 350 enable the nitrogen delivery device 200 to introduce nitrogen into different positions of the powder delivery pipe 500, thereby maintaining a positive pressure in the powder delivery pipe 500 and making the air pressure uniform and stable at different positions of the powder delivery pipe 500, thereby making the transportation of powder in the powder delivery pipe 500 more stable.

[0035] The powder drying and conveying system provided by the present invention has the following beneficial effects compared with the prior art:

[0036] The drying tank 100 of the present invention dries the powder in the tank. The output ends of several drying tanks 100 are respectively connected to the powder conveying pipe 500, and the output ends of the powder conveying pipe 500 are connected to the storage tank 400. The dried powder is conveyed to the storage tank 400 through the powder conveying pipe 500, which has high efficiency in the transportation of the powder. The drying tank 100 is provided with a stirring paddle 120 to stir the powder during the drying process, so that the powder is stirred from bottom to top and radially in the drying tank 100 so that the powder in the tank does not accumulate and achieves the effect of uniform and rapid heating. The delivery end of the nitrogen delivery device 200 is connected to the nitrogen delivery pipe 300. The nitrogen delivery device 200 delivers nitrogen to the drying tank 100 and the powder delivery pipe 500 through the nitrogen delivery pipe 300, the first branch 310 and the second branch 320. Nitrogen is delivered to maintain positive pressure in the drying tank 100 and the powder conveying pipe 500. A vacuum loader 410 is provided on the storage tank 400 to maintain negative pressure inside the storage tank 400. The powder dried in the drying tank 100 is conveyed to the storage tank 400 by the positive and negative air pressures, avoiding the use of a blower to cause loud noise. The powder is conveyed from the positive-pressure drying tank 100 to the negative-pressure storage tank 400, forming a drainage effect, and the conveying is stable and smooth. The powder is transported by air pressure to achieve high powder conveying efficiency and low noise during conveying. The powder is blown up by the nitrogen to keep the powder in a moving state in the drying tank 100 and the powder conveying pipe 500, so that the powder is not easily accumulated and blocked in the drying tank 100 and the powder conveying pipe 500. In addition, the nitrogen is introduced into the drying tank 100 to remove evaporated moisture from the powder, thereby achieving a good drying effect.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A powder drying and conveying system, characterized in that: Including drying tank, powder conveying pipe, storage tank, nitrogen conveying device and nitrogen conveying pipe; There are several drying tanks, each of which is provided with a stirring paddle. A nitrogen input connector is provided at the lower end of the drying tank. The output ends of the drying tanks are respectively connected to the powder conveying pipe, and the output end of the powder conveying pipe is connected to the storage tank. The delivery end of the nitrogen delivery device is connected to the nitrogen delivery pipe, and the nitrogen delivery pipe is connected to the powder delivery pipe. The nitrogen delivery pipe is connected to a first branch and a second branch in a bypass manner. The first branch is connected to the nitrogen input connector, and the second branch is connected to the output end of the drying tank. The nitrogen delivery device delivers nitrogen to the drying tank and the powder delivery pipe to maintain positive pressure in the drying tank and the powder delivery pipe. The storage tank is provided with a vacuum loader, which can maintain negative pressure inside the storage tank.

2. The powder drying and conveying system according to claim 1, characterized in that: The first branch line is provided with a first nitrogen valve, and the second branch line is provided with a second nitrogen valve.

3. The powder drying and conveying system according to claim 2, characterized in that: An exhaust filter is provided at the upper end of the drying tank, and the exhaust filter is communicated with the external environment.

4. The powder drying and conveying system according to claim 2, characterized in that: One-way valves are provided at the output end of the first nitrogen valve and the output end of the second nitrogen valve.

5. The powder drying and conveying system according to any one of claims 1 to 4, characterized in that: The output of the drying tank is connected to a discharge valve, and the output end of the discharge valve is communicated with the powder conveying pipe.

6. The powder drying and conveying system according to claim 5, characterized in that: The nitrogen delivery pipe is connected to a third branch in a bypass manner. A third nitrogen valve is provided on the third branch. A one-way valve is provided at the output end of the third nitrogen valve. The output end of the third branch is communicated with the discharge valve.

7. The powder drying and conveying system according to claim 1, characterized in that: The nitrogen delivery pipe is connected to a fourth branch in a bypass manner, and the fourth branch is connected to the initial end of the powder delivery pipe.

8. The powder drying and conveying system according to claim 1, characterized in that: A fourth nitrogen valve is provided at the end of the nitrogen delivery pipe, and a plurality of connecting pipes connected to the powder delivery pipe are provided at the output end of the fourth nitrogen valve.

Images