Air energy atomization reverse spray drying equipment

Abstract

The present invention discloses an air-energy atomization reverse spray drying device, including an air compressor and a drying tower, wherein the air compressor is connected to a nozzle arranged at the bottom of the drying tower through a pipeline, the air compressor is also connected to a combustion furnace through a pipeline, the combustion furnace is connected to the drying tower below the nozzle through a pipeline, a feed port is also arranged at the bottom of the drying tower, the feed port is externally connected to a feed pipeline, and the feed port is connected to the nozzle through a pipeline; the top of the drying tower is connected to the feed port of a cyclone separator through a pipeline, a discharge valve is arranged at the bottom of the cyclone separator, the top of the cyclone separator is connected to a spray dust removal tower through a pipeline, the top of the spray dust removal tower is connected to an absorption tower through a pipeline, and the gas treated by the absorption tower is emptied from the top of the absorption tower. The present application has high drying efficiency, and the gas generated during the drying process is processed by multiple layers, which will not affect the environment.

Description

Technical Field

[0001] The invention relates to the technical field of drying equipment, in particular to air energy atomization reverse spray drying equipment. Background Art

[0002] Spray drying equipment is widely used in the fields of biological product preparation, pharmaceutical and chemical industries. It is mainly used to spray dry the slurry of the product to obtain powder or granules. Most existing spray drying equipment uses an infusion pump to transport the slurry to the nozzle, and the nozzle uses downward spraying, resulting in low drying efficiency. In addition, the volatile gases during the drying process will also have a certain impact on the environment. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, the present application provides an air-energy atomization reverse spray drying device, and the specific scheme is as follows: an air-energy atomization reverse spray drying device, comprising an air compressor and a drying tower, wherein the air compressor is connected to a nozzle arranged at the bottom of the drying tower through a pipeline, and the air compressor is also connected to a combustion furnace through a pipeline, and the combustion furnace is connected to the drying tower below the nozzle through a pipeline, and a feed port is also arranged at the bottom of the drying tower, and the feed port is externally connected to a feed pipe, and the feed port is connected to the nozzle through a pipeline, and the material is sprayed upward after entering the nozzle; the top of the drying tower is connected to the feed port of a cyclone separator through a pipeline, and a discharge valve is arranged at the bottom of the cyclone separator, and the top of the cyclone separator is connected to a spray dust removal tower through a pipeline, and the top of the spray dust removal tower is connected to an absorption tower through a pipeline, and the gas treated by the absorption tower is discharged from the top of the absorption tower.

[0004] Furthermore, an air distributor is provided at the bottom of the drying tower. The air distributor is provided above the air entering the drying tower through the combustion furnace. By providing the air distributor, the heated air and the material can be fully mixed.

[0005] Furthermore, a waste gas heat exchanger is arranged between the cyclone separator and the spray dust removal tower, one side of the waste gas heat exchanger is connected to the blower, and the waste gas heat exchanger is also connected to the combustion furnace through a pipeline to further effectively utilize the generated waste heat.

[0006] Furthermore, a spray dust removal tower induced draft fan is arranged on one side of the spray dust removal tower, which absorbs gas from the bottom of the spray dust removal tower and is connected to the top of the spray dust removal tower. The spray dust removal tower is also connected to a water pipe, and the bottom of the spray dust removal tower is open and connected to a feed pipe.

[0007] Furthermore, the absorption tower includes a water washing absorption tower and an alkali washing absorption tower which are connected in sequence. The water washing absorption tower is connected to an external water pipe, and the top of the water washing absorption tower is connected to an induced draft fan, and the induced draft fan is connected to the alkali washing absorption tower; the alkali washing absorption tower is connected to an external water pipe, and one side of the alkali washing absorption tower is also connected to an alkali tank, and the gas absorbed by the alkali washing absorption tower is discharged.

[0008] Furthermore, liquid recovery ports are provided at the bottoms of the spray dust removal tower, the water wash absorption tower and the alkali wash absorption tower.

[0009] Furthermore, the discharge valve at the bottom of the cyclone separator is connected to a discharge pipe, a mixing chamber is arranged at the front end of the discharge pipe, the mixing chamber is respectively connected to the external air and the air after combustion in the combustion furnace, a cyclone silo is arranged at the end of the discharge pipe, a suction fan is arranged on the top of the cyclone silo, and the other end of the suction fan is connected to the feed port of the cyclone separator.

[0010] Furthermore, the feed pipeline is connected to a feed pump, and the other end of the feed pump is connected to a water tank and a transition tank arranged in parallel, and the slurry stock solution to be dried is placed in the transition tank.

[0011] The benefit of the present application is that: compared with the traditional atomizing drying tower, the drying equipment of the present invention is sprayed upward from the bottom of the tower through the atomizing nozzle, and is fully mixed and dried with the superheated air introduced from the bottom of the tower in the drying tower. The atomization specific surface area of ​​the drying tower is large, and its evaporation intensity is 8-10 times that of the traditional top-spraying drying tower with the same production capacity; the drying tower in the present application adopts a reverse spraying structure, and it is fully dried in the tower after atomization. The water in the atomized particles is evaporated in large quantities and reduced to a suitable weight before it can be blown out from the top of the tower by hot air, and is fully stirred in the tower, so that the material will not clump or harden in the tower. The atomization of the liquid in the present application adopts compressed air as the power source, and the construction investment is small. Compared with the traditional high-speed centrifugal atomizer, the atomization structure of the present application is simple, easy to repair and maintain, and has a low failure rate. The drying efficiency of the equipment of the present application is high, and the gas generated during the drying process is treated by multiple layers, and the waste water and waste heat are recycled and reused, which will not affect the environment and improve the economic benefits of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic structural diagram of an embodiment of the air atomization reverse spray drying equipment of the present application;

[0013] Figure 2 for Figure 1 Schematic diagram of the discharge structure of the air-cooled atomizing reverse spray drying equipment.

[0014] Marked in the figure: 10, air compressor, 101, pressure regulating valve, 11, drying tower, 111, feed port, 12, combustion furnace, 13, natural gas, 14, nozzle, 15, air distributor, 16, cyclone separator, 161, discharge valve, 17, exhaust gas heat exchanger, 171, blower, 18, spray dust removal tower, 181, spray dust removal tower liquid recovery port, 182, spray dust removal tower induced draft fan, 19, water washing absorption tower, 191, water washing absorption tower liquid recovery port, 20, induced draft fan, 21, alkali washing absorption tower, 211, alkali washing absorption tower liquid recovery port, 22, alkali tank, 23, feeding pump, 24, water tank, 25, transition tank, 26, mixing chamber, 261, air inlet, 262, hot air inlet, 27, discharge pipe, 28, cyclone silo, 29, suction fan. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] See also Figure 1-2 The present embodiment provides an air-energy atomization reverse spray drying device, including an air compressor 10 and a drying tower 11. The air compressor 10 is connected to a nozzle 14 arranged at the bottom of the drying tower through a pipeline. A pressure regulating valve 101 is arranged at the outlet of the air compressor. The air compressor 10 is also connected to a combustion furnace 12 through a pipeline. The combustion furnace 12 is connected to the drying tower below the nozzle through a pipeline. A feed port 111 is also arranged at the bottom of the drying tower. The feed port is externally connected to a feed pipeline. The feed port 111 is connected to the nozzle 14 through a pipeline. After the material enters the nozzle, it is sprayed upward; the top of the drying tower 11 is connected to the feed port of the cyclone separator 16 through a pipeline. A discharge valve 161 is arranged at the bottom of the cyclone separator. The top of the cyclone separator is connected to the spray dust removal tower 18 through a pipeline. The top of the spray dust removal tower is connected to the absorption tower through a pipeline. The gas treated by the absorption tower is discharged from the top of the absorption tower;

[0017] Preferably, a blower 15 is further provided at the bottom of the drying tower 11, and the blower 15 is provided above the air entering the drying tower through the combustion furnace and below the nozzle, and an exhaust gas heat exchanger 17 is provided between the cyclone separator 16 and the spray dust removal tower 18, and a blower 171 is connected to one side of the exhaust gas heat exchanger 17, and the exhaust gas heat exchanger is also connected to the combustion furnace 12 through a pipeline, and a liquid recovery port is provided at the bottom of the exhaust gas heat exchanger 17;

[0018] Preferably, a spray dust removal tower induced draft fan 182 is provided on one side of the spray dust removal tower 18, the spray dust removal tower induced draft fan 182 absorbs gas from the bottom of the spray dust removal tower and is connected to the top of the spray dust removal tower, the spray dust removal tower 18 is also connected to a water pipe, the bottom of the spray dust removal tower is also connected to a feed pipeline, and a spray dust removal tower liquid recovery port 181 is also provided at the bottom of the spray dust removal tower;

[0019] Specifically, the absorption tower includes a water washing absorption tower 19 and an alkali washing absorption tower 21 which are connected in sequence. The water washing absorption tower 19 is connected to a water pipe. A water washing absorption tower induced draft fan is arranged on one side of the water washing absorption tower. The water washing absorption tower induced draft fan absorbs gas from the bottom of the water washing absorption tower and is connected to the top of the water washing absorption tower. A water washing absorption tower liquid recovery port is arranged at the bottom of the water washing absorption tower. The top of the water washing absorption tower is connected to the induced draft fan 20. The induced draft fan 20 is connected to the alkali washing absorption tower 21. The alkali washing absorption tower 21 is also connected to an external water pipe. An alkali washing absorption tower induced draft fan is arranged on one side of the alkali washing absorption tower. The alkali washing absorption tower induced draft fan absorbs gas from the bottom of the alkali washing absorption tower and is connected to the top of the alkali washing absorption tower. A alkali washing absorption tower liquid recovery port is arranged at the bottom of the alkali washing absorption tower. One side of the alkali washing absorption tower is also connected to an alkali tank 22, and the gas absorbed by the alkali washing absorption tower is discharged.

[0020] Preferably, the discharge valve 161 at the bottom of the cyclone separator 16 is connected to the discharge pipe 27, the front end of the discharge pipe 27 is provided with an air mixing chamber 26, the air mixing chamber 26 is respectively provided with an air inlet 261 and a hot air inlet 262 of the air after combustion in the combustion furnace, the end of the discharge pipe 27 is provided with a cyclone silo 28, the top of the cyclone silo 28 is provided with a suction fan 29, and the other end of the suction fan 29 is connected to the feed port of the cyclone separator;

[0021] Preferably, the feed pipeline is connected to the feed pump 23, and the other end of the feed pump 23 is connected to the water tank 24 and the transition tank 25 which are arranged in parallel, and the slurry stock solution to be dried is placed in the transition tank 25.

[0022] Working principle: The slurry enters the drying tower 11 for atomization drying, and then enters the cyclone separator 16 to complete the separation of gas and solid. The separated solid enters the discharge pipe 27 and is further dried and separated through the cyclone silo 28; the gas passing through the cyclone separator 16 is absorbed and treated by the spray dust removal tower 18, the water washing absorption tower 19 and the alkali washing absorption tower 21 and then discharged.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air atomization spray drying device, comprising an air compressor and a drying tower, characterized in that: The air compressor is connected to the nozzle arranged at the bottom of the drying tower through a pipeline, and the air compressor is also connected to the combustion furnace through a pipeline, and the combustion furnace is connected to the drying tower below the nozzle through a pipeline. A feed port is also arranged at the bottom of the drying tower, and the feed port is externally connected to a feed pipeline, and the feed port is connected to the nozzle through a pipeline, and the material is sprayed upward after entering the nozzle; The top of the drying tower is connected to the feed port of the cyclone separator through a pipeline, a discharge valve is arranged at the bottom of the cyclone separator, the top of the cyclone separator is connected to the spray dust removal tower through a pipeline, the top of the spray dust removal tower is connected to the absorption tower through a pipeline, and the gas treated by the absorption tower is discharged from the top of the absorption tower; A wind distributor is also provided at the bottom of the drying tower, and the wind distributor is arranged above the air entering the drying tower through the combustion furnace; The discharge valve at the bottom of the cyclone separator is connected to a discharge pipe, a mixing air chamber is arranged at the front end of the discharge pipe, and the mixing air chamber is respectively connected to external air and air burned in the combustion furnace. A cyclone silo is arranged at the end of the discharge pipe, and a suction fan is arranged on the top of the cyclone silo. The other end of the suction fan is connected to the feed port of the cyclone separator.

2. The air atomization spray drying equipment according to claim 1, characterized in that: An exhaust gas heat exchanger is arranged between the cyclone separator and the spray dust removal tower. One side of the exhaust gas heat exchanger is connected to the blower, and the exhaust gas heat exchanger is also connected to the combustion furnace through a pipeline.

3. The air-energy atomization reverse spray drying equipment according to claim 1 is characterized in that: A spray dust removal tower induced draft fan is arranged on one side of the spray dust removal tower, which absorbs gas from the bottom of the spray dust removal tower and is connected to the top of the spray dust removal tower. The spray dust removal tower is also connected to a water pipe, and the bottom of the spray dust removal tower is open and connected to a feed pipe.

4. The air energy atomization reverse spray drying equipment according to claim 1 is characterized in that: The absorption tower comprises a water-washing absorption tower and an alkali-washing absorption tower which are connected in sequence. The water-washing absorption tower is connected to an external water pipe, and the top of the water-washing absorption tower is connected to an induced draft fan, which is connected to the alkali-washing absorption tower. The alkali-washing absorption tower is connected to an external water pipe, and one side of the alkali-washing absorption tower is also connected to an alkali tank, and the gas absorbed by the alkali-washing absorption tower is discharged.

5. The air-energy atomization reverse spray drying equipment according to claim 4 is characterized in that: Liquid recovery ports are arranged at the bottoms of the spray dust removal tower, the water washing absorption tower and the alkali washing absorption tower.

6. The air atomization spray drying equipment according to claim 1, characterized in that: The feed pipeline is connected to a feed pump, and the other end of the feed pump is connected to a water tank and a transition tank which are arranged in parallel, and the raw liquid to be dried is placed in the transition tank.

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