CN209679679U - For the solid gas separator in pneumatic conveying or ventilating system - Google Patents

Abstract

The solid-gas separation device used in pneumatic conveying or ventilation systems relates to the technical field of solid-gas separation equipment, which includes an air intake pipe, a dust collection chamber and an exhaust pipe. The spiral blade advances along the helical route. The dust collection chamber is provided with an upper cavity and a lower cavity connected to the upper cavity. The front end of the upper cavity is connected to the air intake pipe, and the inner wall of the upper cavity faces The direction in which the airflow advances is circular and inclined so that the upper cavity is in the shape of a circular platform. An air outlet is opened on the rear end surface of the upper cavity, and the air outlet is connected to the exhaust pipe. The lower cavity The top of the top is connected with the bottom of the upper cavity, and the lower cavity is provided with a discharge port. The dust collector of the utility model has small resistance and small volume, and can be used in the separation work before dust discharge in industrial production to improve separation efficiency and reduce energy consumption, and can also achieve a good separation effect on dust particles with a particle size of less than 10um .

Description

Solid-gas separation device for pneumatic conveying or ventilation systems

technical field

The utility model relates to the technical field of solid-gas separation equipment, in particular to a solid-gas separation device used in pneumatic conveying or ventilation systems.

Background technique

In many industrial production processes, a large amount of particulate matter will be emitted. If it is discharged into the atmosphere randomly, it will pollute the atmosphere, endanger human health, and affect industrial and agricultural production. Therefore, it is necessary to effectively separate the particles in the dusty air so that the dusty air can meet the emission standards. In some production processes, the separated particles can also be recycled as raw materials or finished products. Therefore, the separation equipment is Industrial production not only has environmental significance, but also has economic significance.

According to the separation mechanism, the existing dust removal devices can be mainly divided into four categories: mechanical dust removal, filter dust removal, electrostatic dust removal and wet dust removal. Mechanical dust removal refers to a device that separates dust particles from the airflow by gravity, inertial force, and centrifugal force.

According to the separation method of dust particles, mechanical dust removal can be divided into cyclone dust collector, gravity dust fall chamber and inertial dust collector. Among them, the cyclone dust collector is currently widely used in industrial dust removal, and can be applied to the airflow with high dust concentration, large amount of dust or large dust particles. Compared with the other three dust removal methods, the dust removal method based on this type of equipment has simple structure and easy use Flexible and convenient, low cost, easy equipment installation and maintenance, and not easy to cause pollution, etc., but there are still phenomena such as low separation efficiency, large pressure drop loss, and easy clogging, fouling, and wear of the cyclone tube. Not only that, but currently common The high-end cyclone dust collectors only have high separation efficiency when collecting and separating particles with a particle size of 10um or more.

In practical applications, standard cyclone separators often limit dust removal efficiency and increase energy consumption due to factors such as improper structural design and unreasonable size matching. With the rapid development of industry and harsh operating conditions, the performance requirements of cyclone dust collectors in the whole industry are also increasing. On the one hand, it requires the cyclone dust collector to have a stronger ability to capture fine dust, and on the other hand, it requires the pressure loss of the cyclone dust collector to be further reduced to reduce energy consumption. It can be seen that the increasingly serious energy shortage and the emphasis on environmental protection issues have prompted the development of dust collectors in the direction of low resistance and high efficiency. However, the performance indicators of various types of cyclone dust collectors widely used in actual operation are far from meeting the above requirements. For example, some existing cyclone dust collectors use the upward cyclone airflow to separate the dust particles in the gas in the vertical pipeline when they are working. The dust particles fall due to their own gravity, but the movement direction of the airflow is different. It is upward, which is exactly opposite to the falling direction of the dust-containing particles, which causes the dust-containing particles to be subject to certain resistance when falling, thus hindering the separation of the dust-containing particles from the airflow to a certain extent, making the dust removal of the whole device The effect is not ideal.

Utility model content

The problem to be solved by this utility model is to provide a solid-gas separation device used in pneumatic conveying or ventilation systems, which separates the dust particles from the air flow by moving the dust particles along the tangential direction of the air flow, so that the dust in industrial production Improve separation efficiency and reduce energy consumption in the separation work before discharge.

In order to solve the above technical problems, the utility model adopts the following technical scheme: a solid-gas separation device used in pneumatic conveying or ventilation systems, including an air inlet pipe, a dust collection chamber and an exhaust pipe, and the air inlet pipe is provided with a The helical blade guides the airflow and makes the airflow advance along the helical route. The dust collecting chamber is provided with an upper cavity and a lower cavity connected to the upper cavity. The front end of the upper cavity is connected with the air intake pipe. The inner wall surface of the upper cavity is annular and inclined towards the direction of the airflow so that the upper cavity is in the shape of a truncated cone, and an air outlet is provided on the rear end surface of the upper cavity, and the air outlet is connected with the exhaust pipe. connected, the top of the lower cavity is connected to the bottom of the upper cavity, and the lower cavity is provided with a discharge port.

Preferably, the lower cavity is in the shape of a polygonal pyramid with a top cross-sectional area larger than a bottom cross-sectional area.

More preferably, the discharge port is arranged at the bottom of the lower cavity.

More preferably, the discharge opening is a circular discharge opening.

Further, the rear end surface of the upper cavity extends backward in the axial direction to form a pie-shaped cavity communicating with the upper cavity.

Preferably, the intake pipe is a cylindrical pipe, and the exhaust pipe is arranged coaxially with the intake pipe.

More preferably, the helical blade is mounted on a central shaft, and the central shaft is axially arranged in the middle of the intake pipe.

Wherein, the helical blade includes four helical sub-blades, and each sub-blade is interlacedly connected on the central shaft.

The working principle of the utility model is: when the dust-laden airflow enters the intake pipe, it can perform centrifugal movement (advance along the spiral line) under the guidance of the helical blade, so that part of the dust particles in the dust-laden airflow are subjected to outward centrifugal force , when the force is greater than the inward viscous resistance of the gas to the dust particles, these dust particles will be thrown to the inner wall of the intake pipe, and then driven by the airflow, these dust particles will stick to the inner wall of the intake pipe The wall advances in a spiral route until it enters the upper cavity of the dust collection chamber. At this time, because the upper cavity is in the shape of a conical cone, and the inner wall of the upper cavity is inclined towards the direction of airflow, the dust particles enter the upper cavity. Under the action of inertia and airflow, the back of the body will also advance in a spiral line against the arc-shaped inner wall of the upper cavity, and part of it can enter the lower cavity along the movement track during the advancement process, and some Part of it hits the rear end wall of the upper chamber after continuing to move forward, and will eventually stick to the inner wall of the upper chamber and slide down into the lower chamber with its own gravity, while the purified gas enters the exhaust pipe and flows out of the exhaust pipe. The exhaust pipe is discharged, and the movement track of the dust particles entering the lower chamber will slide down in the lower chamber and then be discharged from the discharge port.

The beneficial effect of the utility model is that: the movement trajectory of the dust-containing particles in the dust collection chamber can move along the tangential direction of the airflow, compared with the opposite direction movement of the airflow and the dust-containing particles in the existing cyclone dust collector, the dust-containing particles move in the extreme To a large extent, it reduces the resistance for the separation (falling) of dust particles. The solid-gas separation device used in pneumatic conveying or ventilation systems has a small volume and a small pressure difference between the inlet and outlet, so that the overall resistance is small. , applying it to the separation work before dust discharge in industrial production can improve the separation efficiency of dust particles, and can also achieve a better separation effect on dust particles with a particle size of less than 10um, reducing energy consumption, not only that , the solid-gas separation device of this structure used in pneumatic conveying or ventilation systems does not require additional support structures or components, and the manufacturing cost is low. It not only improves the efficiency of the equipment near the fan end, but also reduces the The burden on the secondary separation equipment, thereby prolonging the service life of the secondary separation equipment.

Description of drawings

Fig. 1 is a schematic cross-sectional view of the overall structure in an embodiment of the utility model;

Fig. 2 is the three-dimensional schematic view of the overall structure in the embodiment;

Fig. 3 is the schematic diagram of the three-dimensional structure of the dust collecting chamber in the embodiment;

Fig. 4 is a schematic structural view of the central shaft and sub-blades in the embodiment.

The reference signs are:

1——air intake pipe 2——dust collection chamber 2a——upper cavity

2b——Lower cavity 2c——Air outlet 2d——Discharge port

3——exhaust pipe 4——spiral blade 4a——sub blade

5——central axis 6——flange.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the utility model will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the implementation modes are not limitations of the utility model.

It should be noted in advance that in this utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense, for example, it can be a fixed connection , can also be detachably connected, or integrally connected; can be directly connected, can also be indirectly connected through an intermediary, and can be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In addition, in the present invention, unless otherwise specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features being in direct contact with each other. The features are not in direct contact but through another feature between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature. The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate The orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, or in a specific orientation construction and operation, therefore, should not be construed as limiting the utility model.

As shown in Figure 1-3, the solid-gas separation device used in pneumatic conveying or ventilation systems includes an inlet pipe 1, a dust collection chamber 2, and an exhaust pipe 3. The airflow advances along the helical route of the helical blade 4. The dust collection chamber 2 is provided with an upper cavity 2a and a lower cavity 2b connected to the upper cavity 2a. The front end of the upper cavity 2a is connected to the air intake pipe 1. The upper cavity 2a The inner wall surface is annular and inclined towards the direction of the airflow so that the upper cavity 2a is in the shape of a circular platform. The rear end surface of the upper cavity 2a is provided with an air outlet 2c. The air outlet 2c is connected with the exhaust pipe 3. The lower The top of the cavity 2b is connected to the bottom of the upper cavity 2a, and the lower cavity 2b is provided with a discharge port 2d.

During the use of the solid-gas separation device used in the pneumatic conveying or ventilation system provided by the above embodiment, firstly, the dust-laden airflow enters the air intake pipe 1 and can perform centrifugal movement under the guidance of the helical blade 4 (advance along the helical line) , so that part of the dust particles in the dust-laden airflow is subjected to an outward centrifugal force, and when the force is greater than the inward viscous resistance of the gas to the dust particles, these dust particles will be thrown to the inner wall of the intake pipe 1, Then, driven by the airflow, these dust particles will stick to the inner wall of the intake pipe 1 and advance in a spiral line until they enter the upper chamber 2a of the dust collection chamber 2. structure, and the inner wall of the upper chamber 2a is inclined towards the direction of the airflow, and the dust particles will stick to the arc-shaped inner wall of the upper chamber 2a after entering the upper chamber 2a under the action of inertia and airflow. The line advances, part of which can enter the lower cavity 2b along the movement track during the advancing process, and another part hits the rear end wall of the upper cavity 2a after continuing to advance, and will eventually stick to the upper cavity The inner wall surface of the body 2a slides down into the lower chamber 2b with its own gravity, and the purified gas enters the exhaust pipe 3 and is discharged from the exhaust pipe 3, and only a small part of dust particles escape from the air outlet 2c. As the air flow enters the exhaust pipe 3 together, the movement trajectory of the dust particles entering the lower cavity 2b will slide down in the lower cavity 2b and then be discharged from the discharge port 2d. The trajectory of the movement can move along the tangential direction of the airflow, which greatly reduces the resistance to the separation (falling) of the dust-containing particles compared to the current cyclone dust collector in which the airflow and the dust-containing particles move in the opposite direction . The solid-gas separation device used in pneumatic conveying or ventilation systems has a small volume and a small pressure difference between the inlet and outlet, so that the overall resistance is small. It is used in the separation work before the dust discharge in industrial production. Pneumatic conveying or the solid-gas separation device in the ventilation system can improve the separation efficiency of dust particles, and can also achieve a better separation effect on dust particles with a particle size of less than 10um, reducing energy consumption. Not only that, the structure of the The solid-gas separation device used in pneumatic conveying or ventilation systems does not require additional support structures or components, and the manufacturing cost is low. It not only improves the efficiency of the equipment near the fan end, but also reduces the secondary separation equipment by using it as the primary separation equipment. The burden, thereby prolonging the service life of the secondary separation equipment.

As preferably, the lower chamber 2b can be arranged as a polygonal pyramid and its top cross-sectional area is larger than the bottom cross-sectional area. In this way, due to the shape restriction of the lower chamber 2b, the dust particles entering the lower chamber 2b The trajectory of the movement will more smoothly slide down in the lower cavity 2b of the polygonal pyramid shape with a large top and a small bottom, and then be discharged from the discharge port 2d, and in this embodiment, the discharge port 2d is set in the lower cavity 2b The bottom end, and the discharge port 2d is a circular discharge port, so as to facilitate installation and connection with existing equipment.

Further, the rear end surface of the upper cavity 2a extends backward in the axial direction to form a pie-shaped cavity communicating with the upper cavity 2a. When the rear end wall of the cavity 2a is used, the pie-shaped cavity can provide a relatively smooth arc-shaped inner wall with a certain width for this part of the dust particles to let them abut against, so that these dust particles can slide more smoothly to the bottom. chamber 2b.

Preferably, the air inlet pipe 1 is a cylindrical pipe, which is convenient for installation and cooperation with the existing pipes, and the exhaust pipe 3 is coaxially arranged with the air inlet pipe 1 to make the wind direction flow more stable, wherein the front end of the air inlet pipe 1 can be The flange 6 is connected to corresponding equipment or pipelines, and the rear end of the intake pipe 1 can also be connected to the front end of the upper cavity 2a through the flange 6 .

As more preferably, as shown in Figure 4, the helical blade 4 is installed on a central shaft 5, and the central shaft 5 is arranged in the middle of the intake pipe 1 along the axial direction, wherein the helical blade 4 includes four helical sub-sections. The blades 4a and each sub-blade 4a are interlacedly connected on the central shaft 5 .

The above-mentioned embodiment is a preferred implementation of the utility model. In addition, the utility model can also be realized in other ways. Any obvious replacement is within the scope of protection of the utility model without departing from the concept of the technical solution. Inside.

In order for those of ordinary skill in the art to more easily understand the improvement of the utility model compared to the prior art, some drawings and descriptions of the utility model have been simplified, and for the sake of clarity, this application document has also omitted some other elements, those of ordinary skill in the art should be aware that these omitted elements may also constitute the content of the present utility model.

Claims (8)

1. A solid-gas separation device used in pneumatic conveying or ventilation systems, including an air inlet pipe (1), a dust collection chamber (2) and an exhaust pipe (3), characterized in that: the air inlet pipe (1) is equipped with There are helical blades (4) used to guide the airflow and make the airflow advance along the helical route, and the dust collection chamber (2) is provided with an upper chamber (2a) and a lower chamber ( 2b), the front end of the upper cavity (2a) is connected to the air intake pipe (1), and the inner wall of the upper cavity (2a) is ring-shaped and inclined toward the airflow direction so that the upper cavity (2a) is in the shape of a circular platform, and an air outlet (2c) is opened on the rear end surface of the upper chamber (2a), and the air outlet (2c) is connected to the exhaust pipe (3), and the lower chamber (2b) ) is connected to the bottom of the upper cavity (2a), and the lower cavity (2b) is provided with a discharge port (2d). 2. The solid-gas separation device used in pneumatic conveying or ventilation systems according to claim 1, characterized in that: the lower cavity (2b) is in the shape of a polygonal pyramid and its top cross-sectional area is larger than the bottom cross-sectional area. 3. The solid-gas separation device used in pneumatic conveying or ventilation systems according to claim 2, characterized in that: the discharge port (2d) is arranged at the bottom of the lower cavity (2b). 4. The solid-gas separation device used in pneumatic conveying or ventilation systems according to claim 3, characterized in that: the discharge opening (2d) is a circular discharge opening. 5. The solid-gas separation device used in pneumatic conveying or ventilation systems according to claim 4, characterized in that: the rear end surface of the upper cavity (2a) extends backward in the axial direction to form a A pie-shaped cavity connected to body (2a). 6. The solid-gas separation device used in pneumatic conveying or ventilation systems according to claim 5, characterized in that: the inlet pipe (1) is a cylindrical pipe, and the exhaust pipe (3) and the inlet pipe (1) Coaxial setting. 7. The solid-gas separation device used in pneumatic conveying or ventilation systems according to claim 6, characterized in that: the spiral blade (4) is installed on a central shaft (5), and the central shaft ( 5) Arranged in the middle of the intake pipe (1) along the axial direction. 8. The solid-gas separation device used in pneumatic conveying or ventilation systems according to claim 7, characterized in that: the spiral blade (4) includes four spiral sub-blades (4a), each sub-blade (4a) Interleaved connection on the central axis (5).