Spray drying equipment with gas-solid separation assembly

Abstract

The utility model discloses spray drying equipment with a gas-solid separation component, which comprises a wet material tank, a drying tower and a cyclone separator, the wet material tank is communicated with the drying tower through a wet material conveying pipe, and the gas-solid separation component is connected between the drying tower and the cyclone separator. The gas-solid separation assembly comprises a first tail gas pipe, a material receiving groove installed at the bottom of the first tail gas pipe and a solid backflow pipe connected with the material receiving groove, the first end, connected to the drying tower, of the first tail gas pipe is lower than the second end, connected to the cyclone separator, of the first tail gas pipe, a sprayer is arranged on the drying tower and connected with a high-pressure gas pipe, and the high-pressure gas pipe is connected with a gas outlet. The spray drying equipment further comprises a heater which is connected with the drying tower through a drying air pipe. The gas-solid separation assembly is arranged between the drying tower and the cyclone separator, so that the content of solid particles in tail gas entering the cyclone separator can be reduced, the working condition of the cyclone separator is reduced, and the separation effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment, specifically to a spray drying device with a gas-solid separation component. Background Technology

[0002] A spray dryer is a device that can simultaneously dry and granulate. The pressure, flow rate, and nozzle size of the feed pump can be adjusted according to process requirements to obtain spherical particles of a specific size ratio. A spray dryer is a type of continuous atmospheric pressure dryer that uses special equipment to spray liquid material into a mist, allowing it to contact hot gas and be dried. It is a relatively common granulation equipment. However, in current spray dryers, after the solid particles are dried in the drying tank, a large number of solid particles enter the cyclone separator along with the exhaust gas, resulting in a high separation load and reduced separation efficiency for the cyclone separator. Utility Model Content

[0003] In view of this, the present invention provides a spray drying device with a gas-solid separation component to solve the above-mentioned problems.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A spray drying device with a gas-solid separation component includes a wet material tank, a drying tower, and a cyclone separator. The wet material tank and the drying tower are connected by a wet material conveying pipe. A gas-solid separation component is connected between the drying tower and the cyclone separator. The gas-solid separation component includes a first exhaust pipe, a receiving trough installed at the bottom of the first exhaust pipe, and a solid return pipe connected to the receiving trough. The first exhaust pipe is connected to a first end of the drying tower and lower than the second end connected to the cyclone separator. A sprayer is provided on the drying tower, and a high-pressure air pipe is connected to the sprayer. The spray drying device also includes a heater, and the heater and the drying tower are connected by a drying air pipe.

[0006] Preferably, the first exhaust pipe is provided with spiral fins.

[0007] Preferably, the bottom of the first exhaust pipe is provided with an opening.

[0008] Preferably, the solid return pipe is equipped with a valve.

[0009] Preferably, the spray drying equipment further includes a finished product tank and an exhaust gas purifier. The finished product tank is connected to the bottom of the drying tower through a solid receiving pipe, and the exhaust gas purifier is connected to the top of the cyclone separator through a second exhaust gas pipe.

[0010] Preferably, the valve includes a valve body and a valve plate, and the valve body is provided with a blind plate, which is semi-circular.

[0011] Preferably, the blind plate is provided with a hinge, and the valve plate is movably connected to the blind plate via the hinge.

[0012] Preferably, a sealing element is provided between the valve plate and the blind plate.

[0013] Preferably, the sealing element is annular, with one part fixed to the inner wall of the valve body and the other part fixed to the blind plate.

[0014] Preferably, the valve plate is provided with a counterweight.

[0015] The beneficial effects of this utility model are:

[0016] This invention provides a spray drying device with a gas-solid separation component, including a wet material tank, a drying tower, and a cyclone separator. The wet material tank and the drying tower are connected by a wet material conveying pipe. A gas-solid separation component is connected between the drying tower and the cyclone separator. The gas-solid separation component includes a first exhaust pipe, a receiving trough installed at the bottom of the first exhaust pipe, and a solid return pipe connected to the receiving trough. The first exhaust pipe is connected at a first end to the drying tower and at a second end to the cyclone separator. A sprayer is installed on the drying tower, and a high-pressure air pipe is connected to the sprayer. The spray drying device also includes a heater, which is connected to the drying tower via a drying air pipe. By setting a gas-solid separation component between the drying tower and the cyclone separator, solid particles in the exhaust gas fall back into the drying tower, reducing the solid particle content in the exhaust gas entering the cyclone separator, reducing the working pressure of the cyclone separator, and increasing the separation effect. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a three-dimensional structural diagram of the spray drying equipment of this utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the gas-solid separation component;

[0020] Figure 3 for Figure 1 Another schematic diagram of the gas-solid separation component;

[0021] Figure 4 for Figure 3 Sectional view along plane A-A;

[0022] Figure 5 for Figure 2 Schematic diagram of the first tailpipe in the middle;

[0023] Figure 6 This is a schematic diagram of the valve body in some embodiments;

[0024] Figure 7 Here is another schematic diagram of the valve body;

[0025] Figure 8 This is a schematic diagram of the valve body in some embodiments.

[0026] In the diagram: 100. Spray drying equipment; 1. Gas compression pump; 2. Heater; 21. Drying air pipe; 3. Wet material tank; 31. Wet material conveying pipe; 32. Feed pump; 33. Mixer; 4. Drying tower; 41. Sprayer; 42. High-pressure air pipe; 43. Gas-solid separation component; 431. First tail gas pipe; 4311. Spiral fins; 4312. Opening; 4313. First end; 4314. Second end; 432. Receiving trough; 433. Solid return pipe; 434. Valve; 4341. Valve body; 4342. Blind flange; 4343. Seal; 4344. Valve plate; 43441. Counterweight; 4345. Hinge; 44. Solid receiving pipe; 5. Cyclone separator; 51. Second tail gas pipe; 6. Tail gas purifier; 7. Finished product tank. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0028] like Figure 1 As shown, this utility model provides a spray drying device with a gas-solid separation component for drying wet materials. The spray drying device 100 includes a wet material tank 3 and a drying tower 4. A wet material conveying pipe 31 is provided between the wet material tank 3 and the drying tower 4. A conveying pump 32 is installed on the wet material conveying pipe 31 for conveying the wet material in the wet material tank 3. A sprayer 41 is provided on the drying tower 4. The sprayer 41 is connected to a high-pressure air pipe 42, and high-pressure compressed gas is input into the sprayer 41 through the high-pressure air pipe 42. The bottom of the drying tower 4 is connected to a solid receiving pipe 44, and the other end of the solid receiving pipe 44 is connected to a finished product tank 7. A gas-solid separation component 43 is provided in the middle of the drying tower 4. The dried material flows into the finished product tank 7 through the solid receiving pipe 44 for storage. The exhaust gas mixed with the dry material enters the cyclone separator 5 through the gas-solid separation component 43. The bottom of the cyclone separator 5 is connected to the solid receiving pipe 44. The dry material collected in the cyclone separator 5 flows into the finished product tank 7 through the solid receiving pipe 44. The exhaust gas enters the exhaust gas purifier 6 through the second exhaust gas pipe 51 for treatment before being discharged.

[0029] like Figures 2-5As shown, the gas-solid separation component 43 includes a first exhaust pipe 431, a receiving trough 432 connected to the bottom of the first exhaust pipe 431, and a solid return pipe 433 connected to the receiving trough 432. The first exhaust pipe 431 is cylindrical and hollow. The first exhaust pipe 431 includes a first end 4313 and a second end 4314. The first end 4313 is connected to the drying tower 4, and the second end 4314 is connected to the cyclone separator 5. The first end 4313 is lower than the second end 4314 in the horizontal direction, so that the first exhaust pipe 431 is installed in a state where one end is higher than the other end. This allows the solids flowing out with the exhaust gas to fall to the bottom of the first exhaust pipe 431 and roll back into the drying tower 4 under the action of gravity.

[0030] The bottom of the first exhaust pipe 431 is also provided with an elongated opening 4312. A receiving trough 432 is installed on the opening 4312. The receiving trough 432 can cover the opening 4312, so that the solid particles in the first exhaust pipe 431 can fall into the receiving trough 432 through the opening 4312 under the action of gravity. The lower end of the receiving trough 432 is connected to the solid return pipe 433, and the other end of the solid return pipe 433 is connected to the drying tower 4, so that the solid particles collected in the receiving trough 432 can fall into the cyclone separator 5 through the solid return pipe 433.

[0031] The solid return pipe 433 is also equipped with a valve 434, which can be a solenoid valve. It is set to open and close at fixed intervals. The interval is adjusted according to the speed of solid collection in the receiving trough 432 to ensure that the thickness of solid particles accumulated in the receiving trough 432 does not exceed the opening 4312.

[0032] In some embodiments, the first exhaust pipe 431 is further provided with spiral fins 4311. The spiral fins 4311 allow the exhaust gas to flow spirally forward in the first exhaust pipe 431. The solids mixed in can be blocked by the fins on the spiral fins 4311 and fall to the bottom of the first exhaust pipe 431, falling back into the drying tower 4, or falling into the receiving tank 432.

[0033] like Figures 6-8 As shown, in some embodiments, valve 434 has the function of automatic opening and closing. Valve 434 includes valve body 4341 and valve plate 4344. A blind plate 4342 is provided on valve body 4341. The blind plate 4342 is semi-circular and has a hinge 4345. Valve plate 4344 is movably fixed on blind plate 4342 by hinge 4345. Preferably, a sealing element 4343 is also provided between valve plate 4344 and blind plate 4342. The sealing element 4343 is ring-shaped, with part fixed to the inside of valve body 4341 and part fixed to blind plate 4342. The sealing element 4343 is made of elastic material and can play a sealing role when valve plate 4344 is closed.

[0034] Valve 434 is horizontally installed in solid return pipe 433. Valve plate 4344 is vertical under the action of gravity, and valve 4344 is in the closed state. Since the exhaust gas flows from drying tower 4 to cyclone separator 5, the pressure in drying tower 4 is greater than the pressure in cyclone separator 5. Valve plate 4344 is also subjected to air pressure, causing valve plate 4344 to close tightly. When a certain amount of solid particles accumulate in receiving trough 432, the solid particles exert a thrust on valve plate 4344. When the thrust is sufficient to offset the gas pressure, valve plate 4344 is pushed, and valve 434 is in the open state. When the accumulated solid flows out, or when the thrust is less than the weight of valve plate 4344, valve plate 4344 falls back under the action of gravity, thus closing.

[0035] In some embodiments, a counterweight 43441 is mounted on the valve plate 4344 to adjust the timing of automatic valve opening.

[0036] The spray drying equipment 100 also includes a gas compression pump 1 and a heater 2. The gas is compressed by the gas compression pump 1 and then enters the heater 2 for heating. The heated gas enters the drying tower 4 through the drying gas pipe 21 to dry the wet material in the drying tower 4.

[0037] In some embodiments, in order to make the wet material in the wet material tank 3 uniform, the wet material tank 3 is also provided with a stirring 33.

[0038] Working principle: Wet materials are mixed evenly in wet material tank 3 and then transported by feed pump 32 to sprayer 41 and high-pressure gas in high-pressure gas pipe 42. The mixture is sprayed into drying tower 4, forming particles of a certain size, which come into contact with heated gas for drying. After drying, most of the solid particles fall to the bottom of drying tower 4 and fall into finished product tank 7 through solid receiving pipe 44. Water vapor, heated gas after heat exchange, and some solid material form exhaust gas, which enters gas-solid separation component 43. Solid material falls back into drying tower 4 through gas-solid separation component 43, while exhaust gas enters cyclone separator 5 for further gas-solid separation. The exhaust gas then enters exhaust gas purifier 6, and solid particles fall into finished product tank 7 through solid receiving pipe 44.

[0039] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A spray drying device with a gas-solid separation component, characterized in that: The system includes a wet material tank (3), a drying tower (4), and a cyclone separator (5). The wet material tank (3) and the drying tower (4) are connected by a wet material conveying pipe (31). A gas-solid separation assembly (43) is connected between the drying tower (4) and the cyclone separator (5). The gas-solid separation assembly (43) includes a first exhaust pipe (431) and a receiving trough (432) installed at the bottom of the first exhaust pipe (431), as well as a solid return trough (432) connected to the receiving trough (432). The first exhaust pipe (431) is connected to the first end (4313) of the drying tower (4) and is lower than the second end (4314) connected to the cyclone separator (5). The drying tower (4) is equipped with a sprayer (41) and a high-pressure air pipe (42) is connected to the sprayer (41). The spray drying equipment (100) also includes a heater (2), and the heater (2) and the drying tower (4) are connected through a drying air pipe (21).

2. The spray drying equipment with a gas-solid separation component according to claim 1, characterized in that: The first exhaust pipe (431) is provided with spiral fins (4311).

3. The spray drying equipment with a gas-solid separation component according to claim 1, characterized in that: The bottom of the first exhaust pipe (431) is provided with an opening (4312).

4. The spray drying equipment with a gas-solid separation component according to claim 1, characterized in that: A valve (434) is provided on the solid return pipe (433).

5. The spray drying equipment with a gas-solid separation component according to claim 1, characterized in that: The spray drying equipment (100) also includes a finished product tank (7) and an exhaust gas purifier (6). The finished product tank (7) is connected to the bottom of the drying tower (4) through a solid receiving pipe (44), and the exhaust gas purifier (6) is connected to the top of the cyclone separator (5) through a second exhaust gas pipe (51).

6. The spray drying equipment with a gas-solid separation component according to claim 4, characterized in that: The valve (434) includes a valve body (4341) and a valve plate (4344). The valve body (4341) is provided with a blind plate (4342), which is semi-circular.

7. The spray drying equipment with a gas-solid separation component according to claim 6, characterized in that: The blind plate (4342) is provided with a hinge (4345), and the valve plate (4344) is movably connected to the blind plate (4342) through the hinge (4345).

8. The spray drying equipment with a gas-solid separation component according to claim 7, characterized in that: A sealing element (4343) is provided between the valve plate (4344) and the blind plate (4342).

9. The spray drying equipment with a gas-solid separation component according to claim 8, characterized in that: The sealing element (4343) is annular, with one part fixed to the inner wall of the valve body (4341) and the other part fixed to the blind plate (4342).

10. The spray drying equipment with a gas-solid separation component according to claim 6, characterized in that: The valve plate (4344) is provided with a counterweight (43441).

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