Fluidized bed circulating re-spraying dust removal device

Abstract

The utility model discloses a fluidized bed circulating re-spraying dust removal device which comprises a fluidized bed main body, the fluidized bed main body comprises an air inlet chamber located at the bottom, a cavity is formed above the air inlet chamber, a partition plate is arranged above the interior of the cavity, a plurality of filter cloth bags are hung below the partition plate, and openings in the top ends of the filter cloth bags penetrate through the partition plate and are fixedly connected with the partition plate in a lap joint mode. A reverse blowing assembly is arranged above the partition plate and comprises a plurality of air pipes, a plurality of air nozzles are distributed at the bottoms of the outer walls of the air pipes and correspond to the axes of the filter cloth bags respectively, the air inlet end of each air pipe is communicated with an air conveying pipe, an induced draft fan is installed at the air inlet end of the air conveying pipe, and a heating box is installed in the middle of the air conveying pipe; an air distribution plate is arranged at the bottom of the cavity, an air outlet pipe is arranged at the top of the cavity, a silencing box is arranged on the air outlet pipe, and an air duct is arranged at the other end of the air outlet pipe. By using the device, the liquid granulation binder attached to the filter cloth bag can be washed clean, and the fluidized bed is ensured to always keep a better dust removal effect.

Description

Technical Field

[0001] This utility model relates to the field of fluidized bed equipment technology, specifically to a fluidized bed circulating re-spraying dust removal device. Background Technology

[0002] When using a fluidized bed to spray granulation binder onto fertilizer, high-speed airflow carrying a large amount of granulation binder is discharged from the fluidized bed, causing environmental pollution.

[0003] The existing Chinese utility model patent "A vortex fluidized bed WDG pesticide granulator", patent number CN201920272491.3, discloses a technical solution that uses a dust removal bag installed inside the vessel to filter the granulation binder in the high-speed flowing air, preventing the granulation binder from polluting the external environment.

[0004] Although the solution involves adding a pulse device above the filter bags to backwash them, the liquid granulation binder has strong viscosity and adheres to the filter bags, resulting in poor backwashing effect. After long-term operation of the fluidized bed, the filtration efficiency of the filter bags will be severely reduced.

[0005] Therefore, it is necessary to provide a fluidized bed circulating re-spraying dust removal device to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a fluidized bed circulating re-spraying dust removal device that can wash away the liquid granulation binder adhering to the filter bag, ensuring that the fluidized bed always maintains a good dust removal effect.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A fluidized bed circulating re-spray dust removal device includes a fluidized bed body. The fluidized bed body includes an air inlet chamber located at the bottom, with an air inlet pipe connected to the bottom end of the air inlet chamber. A cavity is provided above the air inlet chamber, and a partition is provided above the cavity. Multiple arrayed filter bags are suspended below the partition, with the top openings of the filter bags penetrating through the partition and overlapping and fixed to it. A back-blowing assembly is provided above the partition, and the back-blowing assembly includes multiple air ducts, with multiple jet nozzles evenly distributed on the bottom of the outer wall of the multiple air ducts. Multiple jet nozzles correspond to the centerlines of multiple filter bags. The air inlet end of each air duct is connected to the air supply pipe. An induced draft fan is installed at the air inlet end of the air supply pipe. A heating box connected to the air supply pipe is installed in the middle of the air supply pipe. An air distribution plate is provided at the bottom of the cavity. An air outlet pipe connected to the cavity is provided at the top of the cavity. A silencer box connected to the air outlet pipe is provided on the air outlet pipe. Sound-absorbing cotton is fixed to the inner wall of the silencer box. Guide plates are fixed on the upper and lower sides of the inner wall of the silencer box. A wind duct is provided at the other end of the air outlet pipe.

[0009] Preferably, the cavity is provided with multiple granulation nozzles.

[0010] Preferably, the cavity is provided with an inlet and an outlet on both sides, and the inlet and outlet are both located above the air distribution plate.

[0011] Preferably, the heating box is equipped with a heating coil.

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] 1. By installing a heating box on the gas supply pipe, the gas supplied to the air duct is a high-temperature and high-pressure airflow. When backwashing the filter bag, the high-temperature and high-pressure airflow can dry the liquid granulation binder adhering to the outer surface of the filter bag into dry granules, thus improving the backwashing effect.

[0014] 2. Installing a silencer box on the air outlet duct can reduce the noise when the air outlet duct is exhausted, thus eliminating the noise pollution of the fluidized bed to the surrounding area. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is a top view of the air distribution panel;

[0018] Figure 4 This is a schematic diagram of the internal structure of the silencer box;

[0019] Among them, 1-air inlet chamber, 2-cavity body, 3-partition plate, 4-filter bag, 5-air duct, 6-jet nozzle, 7-exhaust fan, 8-heating box, 9-air distribution plate, 10-granulation nozzle, 11-air outlet duct, 12-silencer box, 1201-sound absorbing cotton, 1202-guide plate, 13-air duct, 14-feed inlet, 15-discharge outlet Detailed Implementation

[0020] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixed connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] In this utility model, terms such as "upper", "lower", "bottom", and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various components or elements of this utility model and do not specifically refer to any component or element in this utility model. They should not be construed as limiting this utility model.

[0023] like Figures 1 to 4 As shown, a fluidized bed circulating re-spray dust removal device includes a fluidized bed body. The fluidized bed body includes an air inlet chamber 1 located at the bottom, with an air inlet pipe connected to the bottom end of the air inlet chamber. A cavity 2 is provided above the air inlet chamber, and a partition 3 is installed inside the cavity. Multiple arrayed filter bags 4 are suspended below the partition, with the top opening of the filter bags penetrating through the partition and overlapping and fixed to it. A back-blowing assembly is installed above the partition, and the back-blowing assembly includes multiple air ducts 5. Multiple jet nozzles 6 are evenly distributed on the bottom of the outer wall of the multiple air ducts, and the multiple jet nozzles correspond to the axis of the multiple filter bags. The air inlet end of each air duct is connected to an air delivery pipe. An induced draft fan 7 is installed at the air end. A heating box 8 connected to the air supply pipe is installed in the middle of the air supply pipe. A heating coil is installed inside the heating box. An air distribution plate 9 is provided at the bottom of the cavity. Multiple granulation nozzles 10 are installed in the middle of the cavity. An air outlet pipe 11 connected to the cavity is provided at the top of the cavity. A silencer box 12 connected to the air outlet pipe is provided on the air outlet pipe. Sound-absorbing cotton 1201 is fixed to the inner wall of the silencer box. Guide plates 1202 are fixed on the upper and lower sides of the inner wall of the silencer box. An air duct 13 is provided at the other end of the air outlet pipe. An inlet 14 and an outlet 15 are provided on both sides of the cavity. The inlet and outlet are located above the air distribution plate.

[0024] The principle and operation method of a fluidized bed circulating spray dust removal device: Open the feed inlet, place the pesticide powder to be granulated on the air distribution plate, then close the feed inlet, and the airflow is sent into the air inlet chamber through the air inlet pipe. The airflow blows towards the air distribution plate, agitating and boiling the pesticide powder into a fluidized state. Under the action of compressed air, the granulation binder is atomized into fine droplets through multiple granulation nozzles and sprayed onto the air distribution plate. The pesticide powder in the fluidized state mixes with the droplets and binds into granules, thereby completing the granulation of the pesticide. Then, the granulated pesticide is discharged from the discharge port. During the granulation process, the airflow carries some binder droplets upwards towards the fluidized bed cavity. The airflow passes through the filter bags and enters the outlet duct. The binder droplets are blocked by the filter bags and adhere to their outer surface. When too much binder adheres to the outer surface of the filter bags, affecting the filtration effect, the backflushing assembly is activated. High-pressure air is sent to the heating chamber through the air supply pipe by the induced draft fan. After being heated by the heating coil, the airflow is ejected from each jet nozzle at high temperature and pressure, backflushing each filter bag. The binder droplets adhering to the outer surface of the filter bags are quickly dried and blown off the filter bags after being washed by the high-temperature and high-pressure airflow, improving the washing effect of the backflushing assembly on the filter bags. At the same time, when the airflow exits from the outlet duct, it must first pass through the silencer box. After being slowed down, guided, and silenced by the silencer box, the airflow is discharged from the air duct, without causing noise pollution to the surrounding area.

[0025] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A fluidized bed circulating re-spraying dust removal device, characterized in that: The fluidized bed body includes an air inlet chamber (1) at the bottom, with an air inlet pipe connected to the bottom of the air inlet chamber. A cavity (2) is provided above the air inlet chamber, and a partition (3) is provided inside the cavity. Multiple arrayed filter bags (4) are suspended below the partition. The top opening of each filter bag penetrates the partition and overlaps with it. A backflushing assembly is provided above the partition, and the backflushing assembly includes multiple air ducts (5). Multiple jet nozzles (6) are evenly distributed on the bottom of the outer wall of the multiple air ducts, and the multiple jet nozzles are connected to the multiple filter bags respectively. Corresponding to the axis, the air inlet end of each air duct is connected to the air supply pipe. An induced draft fan (7) is installed at the air inlet end of the air supply pipe. A heating box (8) connected to the air supply pipe is installed in the middle of the air supply pipe. An air distribution plate (9) is provided at the bottom of the cavity. An air outlet pipe (11) connected to the cavity is provided at the top of the cavity. A silencer box (12) connected to the air outlet pipe is provided on the air outlet pipe. Sound-absorbing cotton (1201) is fixed on the inner wall of the silencer box. Guide plates (1202) are fixed on the upper and lower sides of the inner wall of the silencer box. A wind duct (13) is provided at the other end of the air outlet pipe.

2. The fluidized bed circulating re-spraying dust removal device according to claim 1, characterized in that: The cavity is equipped with multiple granulation nozzles (10).

3. The fluidized bed circulating re-spraying dust removal device according to claim 1, characterized in that: The cavity is provided with an inlet (14) and an outlet (15) on both sides, and the inlet and outlet are located above the air distribution plate.

4. The fluidized bed circulating re-spraying dust removal device according to claim 1, characterized in that: The heating box is equipped with a heating coil.

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