A multi-stage dust removal device

Abstract

The utility model discloses a multistage dust collector, include: horizontal air inlet pipe for dust-containing airflow's entrance, vertical placement's first stage dust removal cylinder, and the first stage dust removal cylinder below is equipped with the first air lock fan of forming negative pressure to separate dust and airflow, air inlet pipe is installed on the first stage dust removal cylinder upper end, horizontal placement's second stage dust removal cylinder, and second stage dust removal cylinder one end is equipped with the guide vane for forming spiral airflow, and the other end is equipped with the air outlet, second stage dust removal cylinder one end located air outlet still is equipped with the second air lock fan for forming negative pressure to separate dust and airflow, the first stage dust removal cylinder with second stage dust removal cylinder between is equipped with the conveying pipeline, the second air lock fan is connected with air inlet pipe through the pipeline to the dust-containing airflow circulation dust removal in second stage dust removal cylinder, through the first stage dust removal cylinder, and the most big granule dust in air is rejected, and then enters second stage dust removal cylinder secondary dust removal, and finally dust-containing gas reenters air inlet pipe, solved the problem that dust separates not thoroughly.

Description

Technical Field

[0001] This utility model relates to a dust removal device, and more particularly to a multi-stage dust removal device. Background Technology

[0002] In environments containing particulate dust, such as warehouses, factories, or small silos, it is essential to install dust removal equipment. This is necessary to protect the health of workers and to prevent dust accumulation from damaging the equipment.

[0003] Common dust collection equipment includes baghouse dust collectors, which filter dust through filter bags. The dust is trapped on the surface of the filter bags, and the gas is discharged. However, this type is not suitable for high-temperature environments, has high maintenance costs, and the airflow direction is difficult to control. Therefore, cyclone dust collectors are commonly used in production lines. A cyclone dust collector consists of an inlet pipe, a cylinder, a cone, and a dust hopper from top to bottom. The dust-laden airflow enters the cylinder through the tangential inlet pipe and rotates in a spiral motion from top to bottom along the outer wall. This downward rotating airflow is the outer vortex. After reaching the bottom of the cone, the outer vortex turns upward and rotates upward along the axis, finally being discharged through the discharge pipe. This upward rotating airflow is the inner vortex. The downward outer vortex and the upward inner vortex rotate in the same direction. When the airflow rotates, the dust particles move towards the outer wall under the propulsion of inertial centrifugal force. The dust particles that reach the outer wall fall into the dust hopper under the combined action of the airflow and gravity.

[0004] However, this type of cyclone dust collector has the problem of incomplete separation of dust and airflow. For example, dust will be re-entrained at the inlet, and dust on the cone wall will be carried up during the rise and fall of the airflow, making it difficult to separate the airflow and dust. Utility Model Content

[0005] Purpose of the utility model: The purpose of this utility model is to provide a multi-stage dust removal device that can solve the problems of secondary dust re-entrainment and incomplete dust separation.

[0006] Technical solution: The multi-stage dust removal device of this utility model includes:

[0007] A horizontal air inlet duct is used as the inlet for dust-laden airflow;

[0008] A vertically placed primary dust collector cylinder, with a first air blower below the primary dust collector cylinder to create negative pressure and separate dust and airflow; the air inlet pipe is installed at the upper end of the primary dust collector cylinder;

[0009] A horizontally placed secondary dust collector is provided, with guide vanes at one end for forming a spiral airflow and an air outlet at the other end; a second fan is also provided at the air outlet end of the secondary dust collector to form a negative pressure to separate dust and airflow.

[0010] A conveying pipe is provided between the primary dust collector and the secondary dust collector; the second airlock fan is connected to the air inlet pipe through the pipe to circulate and remove dust from the dust-laden airflow in the secondary dust collector.

[0011] Furthermore, the primary dust collector includes a cylindrical tube at the upper end and a conical tube at the lower end. The conical tube is wider at the top and narrower at the bottom to rotate the airflow and remove dust.

[0012] Furthermore, the secondary dust collector includes an inlet cylindrical duct and an outlet cylindrical duct located at both ends, with ventilation holes provided between the inlet and outlet cylindrical ducts to increase the pressure difference and promote airflow.

[0013] Furthermore, the diameter of the ventilation hole is smaller than the diameter of the inlet cylindrical duct and the outlet cylindrical duct, and conical ducts are respectively provided on both sides of the ventilation hole to connect with the inlet cylindrical duct and the outlet cylindrical duct.

[0014] Furthermore, the guide vanes are centrally installed inside the air inlet cylindrical duct, and the air outlet is centrally installed inside the air outlet cylindrical duct.

[0015] Furthermore, the conveying pipe is connected to the air inlet cylindrical duct via a tapered connecting pipe.

[0016] Furthermore, the air inlet pipe and the primary dust collector are both mounted on the support frame.

[0017] Beneficial effects: Compared with the prior art, the beneficial effects of this utility model are as follows: By using a primary dust collector and a first-stage fan, the rotational separation efficiency of the dust-laden airflow is improved, removing most of the large dust particles in the air; the remaining dust is carried upward by the airflow into the secondary dust collector, where the guide vanes and the second fan form a stable vortex, and the dust in the airflow is separated again by centrifugal force; secondary dust removal is performed, and the gas that is not completely dust-removed is sucked in by the second fan and transported to the air inlet pipe for circulation separation; dust is prevented from flying, and the problem of incomplete airflow dust separation is solved. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the multi-stage dust removal device of this utility model;

[0019] Figure 2 This is a cross-sectional schematic diagram of the multi-stage dust removal device of this utility model. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0021] This utility model relates to a multi-stage dust removal device for needles, such as... Figure 1-2As shown; it includes a support frame 1, and an air inlet pipe 2, a first-stage blower 3, and a primary dust collector 4 fixedly installed on the support frame 1; the air inlet pipe 2 is a cylindrical pipe, one end of which is connected to the air inlet blower, and the other end is connected to the primary dust collector 4; the air inlet pipe 2 is horizontally installed on the support frame 1, and the primary dust collector 4 is vertically installed on the support frame 1; the primary dust collector 4 includes a cylindrical pipe 41 at the upper end and a conical pipe 42 at the lower end. The top of the cylindrical pipe 41 is sealed and the lower part is fixedly connected to the conical pipe 42. The conical pipe 42 is wider at the top and narrower at the bottom to facilitate the airflow rotation and form a vortex to separate dust; the end of the conical pipe 42 is connected to the first-stage blower 3, which provides negative pressure to the primary dust collector 4; the secondary dust collector 5 is horizontally installed. The secondary dust collector 5 includes an inlet cylindrical duct 51 and an outlet cylindrical duct 52 located at both ends. The end of the inlet cylindrical duct 51 is connected to the conveying pipe 6 via a tapered connecting pipe 53, and guide vanes 54 are installed inside the inlet cylindrical duct 51. An air outlet 8 is installed in the center of the end of the outlet cylindrical duct 52. A ventilation hole 55 is located between the inlet cylindrical duct 51 and the outlet cylindrical duct 52. The diameter of the ventilation hole 55 is smaller than the diameter of the pipes of the inlet cylindrical duct 51 and the outlet cylindrical duct 52, and the two sides of the ventilation hole 55 are connected to the inlet cylindrical duct 51 and the outlet cylindrical duct 52 via tapered ducts 56, respectively. Wind pressure is formed at the connection between the ventilation hole 55 and the tapered duct 56, improving the airflow efficiency. The primary dust collector 4 and the secondary dust collector 5 are connected by the conveying pipe 6. A second shut-off fan 7 is installed inside the cylindrical air duct 52. The air inlet of the second shut-off fan 7 is located below the air outlet 8, and the air outlet of the second shut-off fan 7 is connected to the air inlet duct 2.

[0022] Working principle: A blower or other device that increases air pressure forces the dust-laden airflow horizontally into the inlet pipe 2. The airflow then enters tangentially through the cylindrical tube 41 of the primary dust collector 4, rotating downwards in a spiral motion along the conical tube 42. After reaching the bottom of the conical tube 42, the rotating dust-laden airflow turns upwards along its axis and enters the conveying pipe 6. During the downward movement of the dust-laden airflow, the first blower 3 creates a negative pressure zone within the primary dust collector 4, causing the dust particles in the airflow to be compressed by the centrifugal force of the airflow and the action of the first blower 3. Initial separation is achieved by using the bottom of the cone, where large dust particles settle to the bottom and are discharged. The initially separated dust-laden airflow enters the secondary dust collector 5 through the conveying pipe 6. Under the pressure difference of the ventilation hole 55, the dust-laden airflow quickly forms a stable vortex through the guide vanes 54. During the rotation of the airflow, dust particles are thrown against the wall of the secondary dust collector 5. The airflow after secondary purification is discharged through the central air outlet 8, while the dust-laden airflow continues to rotate in the outlet cylindrical air duct 52 and is drawn into the second fan 7 and transferred to the inlet air duct 2, restarting the dust removal cycle.

[0023] Furthermore, it should be noted that the airlock used in this utility model is used to generate negative pressure and discharge dust particles; therefore, it can be matched with the diameter of the cylindrical air duct 52 and the minimum diameter of the conical tube 42. For example, a high-temperature resistant stainless steel 304 type (200mm diameter, 0.55kW): GR200-S-0.55 can be used; there are no restrictions on this, and a suitable commercially available model can be selected according to the diameter.

Claims

1. A multi-stage dust removal device, characterized in that, include: A horizontal air inlet duct (2) is used as the inlet for dust-laden airflow; A vertically placed primary dust collector (4) is provided with a first air blower (3) below the primary dust collector (4) to form a negative pressure to separate dust and airflow; the air inlet pipe (2) is installed at the upper end of the primary dust collector (4); A horizontally placed secondary dust collector (5) is provided with a guide vane (54) for forming a spiral airflow at one end and an air outlet (8) at the other end; a second fan (7) for forming a negative pressure to separate dust and airflow is also provided at the end of the secondary dust collector (5) located at the air outlet (8). A conveying pipe (6) is provided between the primary dust collector (4) and the secondary dust collector (5); the second air blower (7) is connected to the air inlet pipe (2) through the pipe to circulate and remove dust from the airflow containing dust in the secondary dust collector (5).

2. The multi-stage dust removal device according to claim 1, characterized in that, The primary dust collector (4) includes a cylindrical tube (41) at the upper end and a conical tube (42) at the lower end. The conical tube (42) is wider at the top and narrower at the bottom to rotate the airflow and remove dust.

3. The multi-stage dust removal device according to claim 1, characterized in that, The secondary dust collector (5) includes an inlet cylindrical duct (51) and an outlet cylindrical duct (52) located at both ends. A ventilation hole (55) is provided between the inlet cylindrical duct (51) and the outlet cylindrical duct (52) to increase the pressure difference and promote airflow.

4. The multi-stage dust removal device according to claim 3, characterized in that, The diameter of the ventilation hole (55) is smaller than the diameter of the inlet cylindrical duct (51) and the outlet cylindrical duct (52), and conical ducts (56) are respectively provided on both sides of the ventilation hole (55) to connect with the inlet cylindrical duct (51) and the outlet cylindrical duct (52).

5. The multi-stage dust removal device according to claim 3 or 4, characterized in that, The guide vane (54) is centrally installed inside the air inlet cylindrical duct (51), and the air outlet (8) is centrally installed inside the air outlet cylindrical duct (52).

6. The multi-stage dust removal device according to claim 3, characterized in that, The delivery pipe (6) is connected to the air inlet cylindrical duct (51) via a tapered connecting pipe (53).

7. The multi-stage dust removal device according to claim 1, characterized in that, The air inlet pipe (2) and the primary dust collector (4) are both installed on the support frame (1).

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