Spray drying device

Abstract

The utility model discloses a spray drying device which comprises a wet material tank and a drying tower, the wet material tank and the drying tower are communicated through a wet material conveying pipe, a pneumatic stirrer, an exhaust pipe and an air inlet pipe are arranged on the wet material tank, the pneumatic stirrer comprises a driving mechanism and a stirring rod, and the spray drying device further comprises a gas compression pump and a heater. The gas compression pump is communicated with the heater through a pipeline, the gas compression pump is further provided with a power gas pipe, the power gas pipe is communicated with the pneumatic stirrer, the heater is communicated with the drying tower through a drying gas pipe, the drying gas pipe is further provided with a heating gas pipe, and the heating gas pipe is communicated with the gas inlet pipe. Original compressed gas and heating gas of equipment are utilized, a motor and heating equipment do not need to be additionally arranged, wet materials in the wet material tank can be stirred and heated, an existing heat source is fully utilized, and investment of the equipment is reduced.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment, specifically to a spray drying device. Background Technology

[0002] A spray dryer is a device that can simultaneously dry and granulate. According to process requirements, the pressure, flow rate, and nozzle size of the feed pump can be adjusted to obtain spherical particles of a certain size ratio. The spray dryer is a type of continuous atmospheric pressure dryer that uses special equipment to spray liquid into a mist, allowing it to come into contact with hot gas and be dried. It is a relatively common granulation equipment. Although current spray dryers can meet basic usage requirements, when the feed liquid is a heterogeneous liquid or suspension, the material in the feed tank will separate into layers. When the ambient temperature is low, the material may also clump together due to the low temperature. Utility Model Content

[0003] In view of this, the present invention provides a spray drying device 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 apparatus includes a wet material tank and a drying tower, which are connected by a wet material conveying pipe. The wet material tank is equipped with a pneumatic agitator, an exhaust pipe, and an air inlet pipe. The pneumatic agitator includes a drive mechanism and an agitator rod. The spray drying apparatus also includes a gas compression pump and a heater. The gas compression pump is connected to the heater via a pipe and is also equipped with a power air pipe connected to the pneumatic agitator. The heater is connected to the drying tower via a drying air pipe and is also equipped with a heating air pipe connected to the air inlet pipe.

[0006] Furthermore, the air inlet pipe is installed close to the tank wall of the wet material tank, and several air outlets are opened near the end.

[0007] Furthermore, the spray drying device also includes a cyclone separator, and a first exhaust pipe is provided on the side wall of the drying tower, which connects the drying tower and the cyclone separator.

[0008] Furthermore, the bottom of the drying tower is provided with a first solid receiving pipe, which is connected to the finished product tank.

[0009] Furthermore, the stirring rod is provided with several sets of stirring paddles.

[0010] Furthermore, the power air pipe is equipped with a first valve, the drying air pipe is equipped with a second valve, and the heating air pipe is equipped with a third valve. When the wet material tank needs to be stirred, the first valve is opened; when the wet material tank needs to be heated, the third valve is opened.

[0011] Furthermore, the top of the cyclone separator is provided with a second exhaust pipe, and an exhaust gas purifier is connected to the second exhaust pipe.

[0012] Furthermore, the bottom of the cyclone separator is provided with a second solid receiving tube, which is connected to the first solid receiving tube.

[0013] Furthermore, a feed pump is provided on the wet material conveying pipe, and a sprayer is provided on the drying tower. The sprayer is provided with a sprayer air pipe, and the wet material is dispersed and granulated in the sprayer.

[0014] Furthermore, the opening faces downwards and forms an angle of 30 to 60° with the sidewall.

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

[0016] This utility model provides a spray drying device, including a wet material tank and a drying tower. The wet material tank and the drying tower are connected by a wet material conveying pipe. The wet material tank is equipped with a pneumatic agitator, an exhaust pipe, and an air inlet pipe. The pneumatic agitator includes a drive mechanism and a stirring rod. The spray drying device also includes a gas compression pump and a heater. The gas compression pump is connected to the heater through a pipe, and the gas compression pump is also connected to the pneumatic agitator through a pipe. The heater is connected to the drying tower through a drying air pipe, and the drying air pipe is also equipped with a heating air pipe connected to the air inlet pipe. The spray drying device provided by this utility model utilizes the existing compressed gas and heating gas of the equipment, without the need to add a motor and heating equipment. It can stir and heat the wet material in the wet material tank, making full use of existing heat sources and reducing equipment investment. 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 schematic diagram of the structure of the energy-saving spray drying device of this utility model;

[0019] Figure 2 for Figure 1 The diagram shows a three-dimensional structure of a pneumatic agitator in a spray drying device.

[0020] In the diagram: 100. Spray drying device; 1. Gas compression pump; 11. First valve; 12. Power air pipe; 2. Heater; 21. Second valve; 22. Drying air pipe; 23. Third valve; 24. Heating air pipe; 3. Wet material tank; 31. Pneumatic agitator; 311. Drive mechanism; 313. Agitator rod; 314. Agitator paddle; 32. Feed pump; 33. Wet material conveying pipe; 34. Sprayer air pipe; 35. Exhaust pipe; 36. Air inlet pipe; 351. Exhaust valve; 4. Drying tower; 41. Sprayer; 42. First solid receiving pipe; 43. First exhaust pipe; 5. Cyclone separator; 51. Second solid receiving pipe; 52. Second exhaust pipe; 6. Finished product tank; 7. Exhaust gas purifier. Detailed Implementation

[0021] 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.

[0022] like Figures 1-2 As shown, this utility model provides a spray drying device 100 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 33 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 33 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 sprayer air pipe 34. High-pressure compressed gas is input into the sprayer 41 through the sprayer air pipe 34. The drying tower 4 is equipped with a first solid receiving pipe 42 at the bottom and a first tail gas pipe 43 in the middle. The dried material is collected through the first solid receiving pipe 42, and the tail gas mixed with the material enters the cyclone separator 5 through the first tail gas pipe 43. The cyclone separator 5 is equipped with a second solid receiving pipe 51 at the bottom and a second tail gas pipe 52 at the top. The dry material collected in the cyclone separator 5 flows into the first solid receiving pipe 42 through the second solid receiving pipe 51, and the tail gas enters the tail gas purifier 7 through the second tail gas pipe 52 for treatment before being discharged.

[0023] The spray drying device 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 air pipe 22 to dry the wet material in the drying tower 4. The wet material tank 3 is also equipped with a pneumatic agitator 31. Pneumatic agitation is prior art and can be referred to the content disclosed in the invention patent pneumatic agitator (CN110723795A). The outlet of the gas compression pump 1 is also connected to the pneumatic agitator 31 through the power air pipe 12 to provide power to the pneumatic agitator 31. The power air pipe 12 is equipped with a first valve 11. When stirring is required in the wet material tank 3, the first valve 11 can be opened.

[0024] In some embodiments, the wet material tank 3 is also provided with an air inlet pipe 36 and an exhaust pipe 35. The air inlet pipe 36 is installed close to the tank wall inside the wet material tank 3, avoiding the movement path of the pneumatic agitator 31 inside the wet material tank. The air inlet pipe has several outlet air holes (not shown in the figure) near its end. The exhaust pipe 35 is provided with an exhaust valve 351. The pneumatic agitator 31 includes a drive mechanism 311 and an agitator rod 313. The agitator rod 313 is provided with several sets of agitator paddles 314.

[0025] A heating gas pipe 24 is also provided on the pipeline between the second valve 21 and the heater 2. The other end of the heating gas pipe 24 is connected to the air inlet pipe 36. A third valve 23 is provided on the heating gas pipe 24. The hot gas in the heater 2 can be introduced into the heating gas pipe 24 through the heating gas pipe 24. The hot gas enters the wet material tank 3 through the air outlet on the heating gas pipe to heat the material in the wet material tank 3.

[0026] When the wet material in the wet material tank 3 is a heterogeneous material or a suspension, the compressed gas introduced from the gas compression pump 1 can drive the pneumatic agitator 31 to rotate and heat the wet material in the wet material tank 3. When the wet material in the wet material tank 3 needs to be heated, the exhaust valve 351 on the exhaust pipe 35 can be opened first, and then the third valve 23 can be opened. The gas heated by the heater 2 enters the inlet pipe 36 through the heating gas pipe 24, and then enters the wet material tank 3 through the outlet hole to heat the wet material in the wet material tank 3.

[0027] In some embodiments, the outlet of the exhaust pipe 35 is connected to a condenser (not shown) to prevent the loss of moisture or solvent from the heated wet material.

[0028] When the spray drying device 100 is finished and the wet material tank 3 needs to be cleaned, water or solvent for cleaning can be added to the wet material tank 3 first. The hot gas in the heater 2 can be used to heat and clean the wet material tank 3 through the heating pipe 24 and the air inlet pipe 36. There is no need to add heating equipment to the wet material tank 3, thus reducing capital investment.

[0029] Working principle: During use, the wet material is in the wet material tank 3. The compressed gas provided by the gas compression pump 1 drives the pneumatic agitator 31 to agitate the wet material. The exhaust valve 351 and the third valve 23 are opened, and the hot gas in the heater 2 heats the wet material in the wet material tank 3. The heated wet material is transported to the sprayer 41 by the feed pump 32. Under the action of high pressure gas in the sprayer air pipe 34, it is dispersed and granulated, and then enters the drying tower 4 for drying. The dried solid product enters the finished product tank 6 through the first solid receiving pipe 42. The tail gas mixed with solids in the drying tower 4 enters the cyclone separator 5 for further separation. The solids enter the first solid receiving pipe 42 through the second solid receiving pipe 51 and flow into the finished product tank 6. The tail gas enters the tail gas purifier 7 through the second tail gas pipe 52.

[0030] The spray drying device 100 provided by this utility model utilizes the existing compressed gas and heating gas in the equipment, without the need to add a motor and heating equipment. It can stir and heat the wet material in the wet material tank 3, making full use of the existing heat source and reducing the investment in equipment.

[0031] 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 apparatus, comprising a wet material tank (3) and a drying tower (4), wherein the wet material tank (3) and the drying tower (4) are connected by a wet material conveying pipe (33), characterized in that: The wet material tank (3) is equipped with a pneumatic stirrer (31), an exhaust pipe (35) and an air inlet pipe (36). The pneumatic stirrer (31) includes a drive mechanism (311) and a stirring rod (313). The spray drying device (100) also includes a gas compression pump (1) and a heater (2). The gas compression pump (1) is connected to the heater (2) through a pipe. The gas compression pump (1) is also equipped with a power air pipe (12). The power air pipe (12) is connected to the pneumatic stirrer (31). The heater (2) is connected to the drying tower (4) through a drying air pipe (22). The drying air pipe (22) is also equipped with a heating air pipe (24). The heating air pipe (24) is connected to the air inlet pipe (36).

2. The spray drying apparatus as described in claim 1, characterized in that: The air inlet pipe (36) is installed close to the tank wall of the wet material tank (3), and several air outlets are provided near the end.

3. The spray drying apparatus as described in claim 2, characterized in that: The spray drying device (100) also includes a cyclone separator (5), and a first exhaust pipe (43) is provided on the side wall of the drying tower (4), which connects the drying tower (4) and the cyclone separator (5).

4. The spray drying apparatus as described in claim 2, characterized in that: The bottom of the drying tower (4) is provided with a first solid receiving pipe (42), which is connected to the finished product tank (6).

5. The spray drying apparatus as described in claim 2, characterized in that: The stirring rod (313) is provided with several sets of stirring paddles (314).

6. The spray drying apparatus as described in claim 2, characterized in that: The power air pipe (12) is provided with a first valve (11), the drying air pipe (22) is provided with a second valve (21), and the heating air pipe (24) is provided with a third valve (23). When the wet material tank (3) needs to be stirred, the first valve (11) is opened; when the wet material tank (3) needs to be heated, the third valve (23) is opened.

7. The spray drying apparatus as described in claim 3, characterized in that: The cyclone separator (5) is provided with a second exhaust pipe (52) at the top, and an exhaust gas purifier (7) is connected to the second exhaust pipe (52).

8. The spray drying apparatus as described in claim 3, characterized in that: The bottom of the cyclone separator (5) is provided with a second solid receiving tube (51), which is connected to the first solid receiving tube (42).

9. The spray drying apparatus as described in claim 2, characterized in that: The wet material conveying pipe (33) is equipped with a conveying pump (32), the drying tower (4) is equipped with a sprayer (41), and the sprayer (41) is equipped with a sprayer air pipe (34). The wet material is dispersed and granulated in the sprayer (41).

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