Spray drying granulator

Abstract

The utility model discloses a spray drying granulator, which belongs to the technical field of granulation equipment, and comprises a granulator tower body, the granulator tower body is arranged on a fixed support, an atomizer is arranged at the top of the granulator tower body, the bottom of the granulator tower body is arranged to be a conical surface with a downward tip, and the top of the granulator tower body is provided with a spray nozzle. A tail gas exhaust pipeline is mounted on the conical surface, an airflow screening machine is mounted at the bottom of the conical surface, the upper part of the airflow screening machine is connected with the tail gas exhaust pipeline through an exhaust pipe, the granulator tower body is provided with a tower body cooling jacket, the left side of the tower body cooling jacket is connected with an air blower through a pipeline, and an air outlet of the air blower is connected with a heater; a high-temperature high-efficiency filter is connected above the heater, the high-temperature high-efficiency filter is connected to an air inlet volute spiral at the top of the granulator tower body through a pipeline, and an air inlet filter is arranged on the right side of the tower body cooling jacket. The device has the characteristics of automatic grading of granulation, high drying efficiency and simplicity in operation.

Description

Technical Field

[0001] The utility model relates to the technical field of granulating equipment, in particular to a spray drying granulator. Background Art

[0002] Spray drying granulator is a device that uses liquid atomization technology to simultaneously complete drying and granulation. According to the process requirements, the pressure, flow rate and size of the spray hole of the liquid pump can be adjusted to obtain the required spherical particles of a certain size ratio. In the production process of existing spray drying granulators, the negative pressure of the induced draft fan is usually used to suck hot air to dry the droplets and aggregate them into granules. The granulation speed is fast, so this technology is widely used in the fields of medicine, food, etc.

[0003] At present, there are still some shortcomings in the existing spray drying granulation technology. Most of the drying granulation has low drying efficiency due to reasons such as structure or air flow path. At the same time, due to the suction of the induced draft fan, some powdered materials will overflow, causing raw material loss, thus resulting in poor granulation results. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a spray drying granulator, which has the characteristics of automatic granulation classification, high drying efficiency and simple operation.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: a spray drying granulator, comprising a granulator tower body, the granulator tower body is installed on a fixed bracket, an atomizer is installed on the top of the granulator tower body, the bottom of the granulator tower body is set as a cone with a tip facing downward, an exhaust gas exhaust port is installed on the upper part of the cone surface, the exhaust gas exhaust port is connected to a cyclone separator through a pipeline, the front end of the bottom of the cyclone separator is connected to an air-sending high-efficiency filter through a pipeline, the other end of the air-sending high-efficiency filter is connected to the air outlet of a Roots blower, an air flow sieving machine is installed at the bottom of the cone surface, the bottom of the air flow sieving machine is connected to the screening air inlet filter through an air inlet pipe, the upper part of the air flow sieving machine is connected to the exhaust gas exhaust pipe through an exhaust pipe, the granulator tower body is provided with a tower cooling jacket, the left side of the tower cooling jacket is connected to a blower through a pipeline, the blower outlet is connected to a heater, a high-temperature high-efficiency filter is connected above the heater, the high-temperature high-efficiency filter is connected to the air inlet volute spiral at the top of the granulator tower body through a pipeline, and an air inlet filter is arranged on the right side of the tower cooling jacket.

[0006] Preferably, a feed pipe is connected to the top of the atomizer, and a peristaltic pump is connected to the other end of the feed pipe. The peristaltic pump is installed on a heat-insulating batching tank, and a stirring device and an electric heating device are arranged inside the heat-insulating batching tank.

[0007] Preferably, the top of the cyclone separator is connected to the bag dust collector through a pipeline, and the upper right side of the bag dust collector is connected to the induced draft fan through a pipeline.

[0008] Preferably, a powder nozzle is provided on the right side of the granulator tower body, and the powder nozzle is connected to the bottom of the cyclone separator through a pipeline and communicates with a pipeline connected to the air-transported high-efficiency filter.

[0009] Preferably, a motor is provided on the left side of the airflow screening machine, a screening drum is provided inside the airflow screening machine, a screen is provided on the screening drum, a material receiving drum is provided on the right side of the airflow screening machine, and the screening drum is connected to the material receiving drum.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] 1. The utility model is provided with an air inlet filter, a blower, a heater and a high-temperature and high-efficiency filter. When working, air enters the jacket through the air inlet filter, is preheated by the hot air inside the tower body, and is heated to a predetermined temperature by the blower heater. Then, the air enters the top of the granulator tower body through the air inlet volute spiral through the high-temperature and high-efficiency filter and contacts with the atomized liquid of the atomizer for granulation, thereby achieving the effect of air preheating. At the same time, the raw materials are preheated by the electric heating device in the heat-insulating batching tank, thereby improving the drying efficiency and saving energy, and achieving a better granulation effect.

[0012] 2. The utility model is provided with a cyclone separator and an airflow screening machine. When working, fine powder enters the cyclone separator through the tail gas exhaust duct, and is sent back to the upper part of the granulator tower body for re-granulation after being separated by the cyclone separator, thereby reducing the loss of raw materials. At the same time, through the screening selection of the airflow screening machine, the particle size distribution of the finished product is narrow and the granulation quality is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the spray drying granulator of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the airflow screening machine of the utility model;

[0015] In the figure: 1, atomizer, 2, air inlet filter, 3, powder nozzle, 4, granulator tower, 5, cyclone separator, 6, bag dust collector, 7, induced draft fan, 8, Roots blower, 9, screening air inlet filter, 10, air flow screening machine, 11, blower, 12, heater, 13, high temperature and high efficiency filter, 14, peristaltic pump, 15, insulation batching tank, 16, air delivery high efficiency filter, 17, tower cooling jacket, 101, screening drum, 102, screen, 103, collecting barrel, 104, exhaust pipe, 105, motor, 106, air inlet pipe, 4, granulator tower. DETAILED DESCRIPTION

[0016] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0017] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0018] The utility model provides Figure 1-2 A spray drying granulator is shown, comprising: a granulator tower (4), the granulator tower (4) being mounted on a fixed bracket, an atomizer (1) being mounted on the top of the granulator tower (4), the bottom of the granulator tower (4) being arranged as a conical surface with the tip facing downward, an exhaust gas outlet being mounted on the upper part of the conical surface, the exhaust gas outlet being connected to a cyclone separator (5) via a pipeline, the front end of the bottom of the cyclone separator (5) being connected to an air-sending high-efficiency filter (16) via a pipeline, the other end of the air-sending high-efficiency filter (16) being connected to the air outlet of a Roots blower (8), an air flow sieving machine (10) being mounted on the bottom of the conical surface, the air flow sieving machine (10) The bottom is connected to a screening air inlet filter (9) via an air inlet pipe (106); the upper part of the airflow screening machine (10) is connected to a tail gas exhaust pipe via an exhaust pipe (104); the granulator tower (4) is provided with a tower cooling jacket (17); the left side of the tower cooling jacket (17) is connected to a blower (11) via a pipe; the air outlet of the blower (11) is connected to a heater (12); the upper part of the heater (12) is connected to a high-temperature and high-efficiency filter (13); the high-temperature and high-efficiency filter (13) is connected to an air inlet volute spiral at the top of the granulator tower (4) via a pipe; and the right side of the tower cooling jacket (17) is provided with an air inlet filter (2).

[0019] Specifically, the top of the atomizer (1) is connected to a feed pipe, the other end of the feed pipe is connected to a peristaltic pump (14), the peristaltic pump is installed on a heat-insulating batching tank (15), and a stirring device and an electric heating device are arranged inside the heat-insulating batching tank (15).

[0020] Specifically, the top of the cyclone separator (5) is connected to the bag dust collector (6) through a pipeline, and the upper right part of the bag dust collector (6) is connected to the induced draft fan (7) through a pipeline.

[0021] Specifically, a powder nozzle (3) is provided on the right side of the granulator tower (4), and the powder nozzle is connected to the bottom of the cyclone separator (5) through a pipeline and communicates with a pipeline connected to the air-transported high-efficiency filter (16).

[0022] Specifically, a motor (105) is arranged on the left side of the airflow screening machine (10), a screening drum (101) is arranged inside the airflow screening machine (10), a screen (102) is arranged on the screening drum, and a material receiving drum (103) is arranged on the right side of the airflow screening machine (10), and the screening drum (101) is connected to the material receiving drum (103).

[0023] In order to improve the drying efficiency of the spray drying granulator, an air dehumidification device can be arranged at the front end of the air inlet filter (2) to reduce the humidity of the air entering the granulator tower (4).

[0024] In order to further improve the drying efficiency of the spray drying granulator, an exhaust gas heat recovery device can be provided at the front end of the air inlet filter (2) and after the bag filter (6), and the heat of the exhaust gas can be recovered to preheat the fresh air entering the air inlet filter (2).

[0025] Working principle:

[0026] Solid materials and solvents are added to a heat-insulating batching tank (14), and are made into spray raw materials at a set temperature through a stirring device and a heating device. The materials are then fed into an atomizer (1) through a feeding pipe by a peristaltic pump (14), and are atomized by the atomizer (1) and contacted with hot air for granulation and drying. The air passes through an air inlet filter (2) and enters a tower cooling jacket for preheating, and then passes through a blower (11) and enters a heater (12) to be heated to a predetermined temperature, and then passes through a high-temperature and high-efficiency filter (13) and enters the top of the granulator tower (4) through an air inlet volute spiral to contact with atomized droplets of the atomizer for granulation and drying. The granulated and dried particles inside the granulator tower (4) fall to the bottom of the lower cone of the granulator tower (4) by gravity, and are screened and collected by the airflow screening machine (10). The particles pass through the screening drum (101), and the coarse particles are screened and enter the collecting cylinder (103). The screened fine powder enters the exhaust gas exhaust duct through the airflow, merges with the exhaust gas from the exhaust port in the granulator tower (4), and is separated by the cyclone separator (5). The dust-containing exhaust gas is discharged from the top of the cyclone separator (5), and is sucked into the atmosphere by the induced draft fan (7) after dust removal by the bag dust collector. The fine powder separated by the cyclone separator (5) is blown to the upper part of the granulator tower (4) by the clean air blown by the roots blower (8) and the air delivery high efficiency filter (16), and is sprayed into the granulator tower through the powder nozzle (3) to contact with the droplets atomized by the atomizer, and is re-granulated to improve the granulation efficiency.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or 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. A spray drying granulator, characterized in that: The invention comprises a granulator tower body (4), wherein the granulator tower body (4) is mounted on a fixed bracket, an atomizer (1) is mounted on the top of the granulator tower body (4), the bottom of the granulator tower body (4) is arranged as a conical surface with the tip facing downward, an exhaust gas outlet is mounted on the upper part of the conical surface, the exhaust gas outlet is connected to a cyclone separator (5) via a pipeline, the front end of the bottom of the cyclone separator (5) is connected to an air-sending high-efficiency filter (16) via a pipeline, the other end of the air-sending high-efficiency filter (16) is connected to the air outlet of a Roots blower (8), an air flow sieving machine (10) is mounted on the bottom of the conical surface, and the bottom of the air flow sieving machine (10) is connected to the air inlet pipe (106) is connected to the screening air inlet filter (9), the upper part of the airflow screening machine (10) is connected to the tail gas exhaust duct through the exhaust pipe (104), the granulator tower (4) is provided with a tower cooling jacket (17), the left side of the tower cooling jacket (17) is connected to the blower (11) through a pipeline, the air outlet of the blower (11) is connected to the heater (12), the upper part of the heater (12) is connected to a high-temperature and high-efficiency filter (13), the high-temperature and high-efficiency filter (13) is connected to the air inlet volute spiral at the top of the granulator tower (4) through a pipeline, and the right side of the tower cooling jacket (17) is provided with an air inlet filter (2).

2. A spray drying granulator according to claim 1, characterized in that: The top of the atomizer (1) is connected to a feed pipe, the other end of the feed pipe is connected to a peristaltic pump (14), the peristaltic pump is installed on a heat-insulating batching tank (15), and a stirring device and an electric heating device are arranged inside the heat-insulating batching tank (15).

3. A spray drying granulator according to claim 1, characterized in that: The top of the cyclone separator (5) is connected to the bag dust collector (6) through a pipeline, and the upper right part of the bag dust collector (6) is connected to the induced draft fan (7) through a pipeline.

4. A spray drying granulator according to claim 1, characterized in that: A powder nozzle (3) is provided on the right side of the granulator tower (4), and the powder nozzle is connected to the bottom of the cyclone separator (5) through a pipeline and communicates with a pipeline connected to the air-transported high-efficiency filter (16).

5. A spray drying granulator according to claim 1, characterized in that: A motor (105) is arranged on the left side of the airflow screening machine (10), a screening drum (101) is arranged inside the airflow screening machine (10), a screen (102) is arranged on the screening drum, and a material collecting drum (103) is arranged on the right side of the airflow screening machine (10), and the screening drum (101) is connected to the material collecting drum (103).

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