CN218524424U - A particle removal device - Google Patents

Abstract

The utility model relates to the technical field of atmospheric environment monitoring and discloses a particle removal device. The particle removal device includes a negative pressure air intake channel, a first centrifugal separation chamber, a second centrifugal separation chamber, an exhaust channel and a detection channel, the negative pressure air intake channel is used to feed the gas to be sampled, and the first centrifugal separation chamber The gas to be sampled is subjected to cyclone separation for the first time to separate the first particles whose particle size is larger than the first preset particle size value in the gas to be sampled, and the second centrifugal separation chamber is used to separate the gas to be sampled after the first cyclone separation The gas is subjected to the second cyclone separation to separate the second particulate matter whose particle size is larger than the second preset particle size value in the gas to be sampled after the first cyclone separation, and the sample to be sampled after the second cyclone separation is passed through the detection channel. The gas is passed to the gas analysis instrument. The utility model has the advantages of low maintenance cost, small volume, easy integration and installation, and no interference to gas measurement results.

Description

A particle removal device

technical field

The utility model relates to the technical field of atmospheric environment monitoring, in particular to a particle removal device.

Background technique

In the field of online monitoring of atmospheric gaseous pollutants, it is necessary to remove the particulate matter components in the atmospheric sample gas to be analyzed. Existing particle removal methods generally use solutions such as precision filter filtration or electrostatic adsorption.

However, the precision filter method has two problems. One is that the filter element needs to be replaced frequently, which increases the cost of equipment operation and maintenance. The second is that for gases with strong adhesion such as NH ₃ , the filter will adhere to a part of the gas to be measured, which will increase the systematic error of the measurement results. The electrostatic adsorption method will generate ozone during the working process, pollute the sample gas to be tested, and interfere with the measurement results of the subsequent system.

Utility model content

Based on the above problems, the purpose of this utility model is to provide a particle removal device with low maintenance cost, small size, easy integration and installation, and no interference to gas measurement results.

For reaching above-mentioned purpose, the utility model adopts following technical scheme:

A particulate removal device comprising:

Negative pressure air intake channel, used to introduce the gas to be sampled;

The first centrifugal separation chamber communicates with the negative pressure inlet passage, and is used for performing cyclone separation on the gas to be sampled for the first time, so as to separate the particle diameter of the gas to be sampled that is larger than the first preset particle size value the first particulate matter;

The second centrifugal separation chamber communicates with the first centrifugal separation chamber, and is used for performing a second cyclone separation on the gas to be sampled after the first cyclone separation, so as to separate the Second particulate matter in the gas to be sampled whose particle size is greater than a second preset particle size value;

An exhaust passage, one end of the exhaust passage communicates with the first centrifugal separation chamber and the second centrifugal separation chamber respectively, and the other end communicates with the outside, so as to separate the second centrifugal separation chamber separated from the first centrifugal separation chamber. The first particle and the second particle separated by the second centrifugal separation chamber are discharged to the outside;

A detection channel, one end of the detection channel communicates with the first centrifugal separation chamber, and the other end communicates with the gas analysis instrument, so that the gas to be sampled after the second cyclone separation is passed into the gas analysis instrument.

As an optional solution of the particle removal device of the present invention, it also includes a first channel, one end of the first channel is in communication with the first centrifugal separation chamber, and the other end is in communication with the exhaust channel, so that the The first particles separated by the first centrifugal separation chamber are passed into the exhaust channel.

As an optional solution of the particle removal device of the present invention, it also includes a second channel, one end of the second channel communicates with the first centrifugal separation chamber, and the other end communicates with the second centrifugal separation chamber, so as to The gas to be sampled after the first cyclone separation passes into the second centrifugal separation chamber.

As an optional solution of the particle removal device of the present invention, it also includes a third channel, one end of the third channel is in communication with the second centrifugal separation chamber, and the other end is in communication with the exhaust channel, so that the The second particles separated by the second centrifugal separation chamber are passed into the exhaust channel.

As an optional solution of the particle removal device of the present invention, it also includes a fourth channel, one end of the fourth channel communicates with the second centrifugal separation chamber, and the other end communicates with the detection channel, so that the second The gas to be sampled after cyclone separation is passed into the detection channel.

As an optional solution of the particle removal device of the present invention, a flow sensor is also included, the flow sensor is arranged in the fourth channel, and is used to detect the flow rate of the gas to be sampled that passes into the detection channel.

As an optional solution of the particle removal device of the present invention, a negative pressure pump is also included, and the negative pressure pump is used to evacuate the negative pressure intake channel to generate negative pressure in the negative pressure intake channel .

As an optional solution of the particle removal device of the present invention, an exhaust fan is also included, and the exhaust fan is arranged at the outlet of the exhaust passage.

As an optional solution of the particle removal device of the present invention, a filter is also included, and the filter is arranged at the inlet of the negative pressure air intake channel.

As an alternative to the particle removal device of the present invention, the inlet of the negative pressure air intake channel is provided with a first valve, the outlet of the exhaust channel is provided with a second valve, and the outlet of the detection channel is provided with a second valve. Three valves.

The beneficial effects of the utility model are:

The particle removal device provided by the utility model is used to feed the gas to be sampled through the negative pressure air intake channel, and perform the first cyclone separation of the gas to be sampled through the first centrifugal separation chamber connected with the negative pressure air intake channel to separate the gas to be sampled. The first particulate matter in the gas whose particle size is larger than the first preset particle size value is subjected to a second cyclone separation on the gas to be sampled after the first cyclone separation through the second centrifugal separation chamber communicated with the first centrifugal separation chamber, so as to Separating the second particles in the gas to be sampled after the first cyclone separation with a particle size larger than the second preset particle size value, and separating the first particles separated by the first centrifugal separation chamber and the second centrifugal separation through the exhaust channel The second particles separated by the chamber are discharged to the outside, and the gas to be sampled after the second cyclone separation is passed into the gas analysis instrument through the detection channel. The particle removal device provided by the utility model has low maintenance cost, small volume, easy integration and installation, and no interference to gas measurement results.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the illustrations of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings according to the content of the embodiments of the present invention and these drawings without any creative effort.

Fig. 1 is a schematic structural view of a particle removal device provided by a specific embodiment of the present invention.

In the picture:

1-Negative pressure inlet channel; 2-First centrifugal separation chamber; 3-Second centrifugal separation chamber; 4-Exhaust channel; 5-Detection channel; 6-First channel; 7-Second channel; 8-No. Three channels; 9-the fourth channel; 10-flow sensor.

Detailed ways

In order to make the technical problem solved by the utility model, the technical scheme adopted and the technical effect achieved clearer, the technical scheme of the embodiment of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiment is only Some embodiments of the utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present utility model.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. 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, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance. Wherein, the terms "first position" and "second position" are two different positions.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

As shown in Figure 1, this embodiment provides a particle removal device, which can be integrated and installed on the atmospheric detection equipment. The particle removal device includes a negative pressure inlet channel 1, a first centrifugal separation chamber 2, and a second centrifugal separation chamber 3 , exhaust channel 4 and detection channel 5. The negative pressure air intake channel 1 is used to introduce the gas to be sampled. The first centrifugal separation chamber 2 communicates with the negative pressure inlet passage 1, and is used for the first cyclone separation of the gas to be sampled, so as to separate the first particulate matter in the gas to be sampled whose particle size is larger than a first preset particle size value. The second centrifugal separation chamber 3 communicates with the first centrifugal separation chamber 2, and is used for performing a second cyclone separation on the gas to be sampled after the first cyclone separation, so as to separate particles in the gas to be sampled after the first cyclone separation. The second particulate matter whose diameter is larger than the second preset particle diameter value. One end of the exhaust passage 4 communicates with the first centrifugal separation chamber 2 and the second centrifugal separation chamber 3 respectively, and the other end communicates with the outside world, so as to separate the first particulate matter separated by the first centrifugal separation chamber 2 and the second centrifugal separation chamber. 3. The separated second particles are discharged to the outside. One end of the detection channel 5 communicates with the first centrifugal separation chamber 2, and the other end communicates with the gas analysis instrument, so that the gas to be sampled after the second cyclone separation is passed into the gas analysis instrument.

The gas to be sampled is introduced through the negative pressure inlet channel 1, and the gas to be sampled is subjected to cyclone separation for the first time through the first centrifugal separation chamber 2 connected with the negative pressure inlet channel 1, so as to separate the particle size of the gas to be sampled that is larger than the first The first particulate matter with a predetermined particle size value is subjected to a second cyclone separation on the gas to be sampled after the first cyclone separation through the second centrifugal separation chamber 3 communicated with the first centrifugal separation chamber 2, so as to separate the first The second particulate matter in the gas to be sampled after the secondary cyclone separation has a particle size larger than the second preset particle size value, and the first particulate matter separated from the first centrifugal separation chamber 2 and the second centrifugal separation chamber 3 are separated through the exhaust channel 4 The separated second particles are discharged to the outside, and the gas to be sampled after the second cyclone separation is passed into the gas analysis instrument through the detection channel 5 .

It should be noted that the cyclone separation principle of the first centrifugal separation chamber 2 and the second centrifugal separation chamber 3 is the same as the separation principle of the cyclone separator in the prior art, that is, the rotary motion caused by the tangential introduction of the airflow makes the The solid particles or droplets of the inertial centrifugal force are separated from the outer wall. Since the centrifugal force on the particles is much greater than the gravity and inertial force, the separation efficiency is high, the structure is simple, the operation is flexible, the efficiency is high, the management and maintenance are convenient, and the price is low. .

The main structure of the first centrifugal separation chamber 2 and the second centrifugal separation chamber 3 is a conical cylinder, a gas inlet pipe is installed in the tangential direction of the upper part of the cylinder, and an exhaust pipe inserted into the cylinder to a certain depth is installed on the top of the cylinder. There is a powder outlet at the bottom of the cylinder to receive particles. When the airflow enters the separation chamber from the intake pipe at a speed of 12-30m/s, the airflow will change from linear motion to circular motion. Most of the swirling air flows along the wall from the cylinder in a spiral downward direction toward the cone. In addition, under the action of centrifugal force, the particles are thrown towards the wall of the device. Once the particles contact the wall, they lose the inertial force, and rely on the momentum of the downward axial velocity near the wall to fall along the wall and enter the ash discharge pipe. The powder outlet is introduced into the exhaust passage 4 to discharge the outside world. The rotating and descending outer swirling air flow continuously flows into the center of the centrifugal separation chamber during the descent process, forming a centripetal radial air flow, and this part of the air flow constitutes an upward rotating inner swirling flow. The direction of rotation of the inner and outer swirls is the same. Finally, the separated gas is discharged through the exhaust pipe, and a part of the finer dust particles that have not been separated also escape. Another small part of gas flowing in from the intake pipe passes through the top cover and flows downward along the outside of the exhaust pipe. When it reaches the lower end of the exhaust pipe, it merges with the rising internal swirling airflow and enters the exhaust pipe, where it is dispersed. Part of the fine particles in the upcycled airflow are also taken away and then collected by bag filters or wet dust collectors.

It can be understood that the movement of gas and solid particles in the first centrifugal separation chamber 2 and the second centrifugal separation chamber 3 is very complicated, and there are tangential, radial and axial velocities at any point in the chamber, which vary with the radius of rotation . Appropriate gas velocity should be controlled in actual operation. Experiments show that if the gas velocity is too small, the separation efficiency is not high. However, if the gas velocity is too high, it is easy to generate eddy current and serious back-mixing phenomenon, which will also reduce the separation efficiency.

For the convenience of passing the first particulate matter separated by the first centrifugal separation chamber 2 into the exhaust passage 4, the particulate removal device may also include a first passage 6, one end of the first passage 6 communicates with the first centrifugal separation chamber 2, and the other One end communicates with the exhaust channel 4 to pass the first particles separated by the first centrifugal separation chamber 2 into the exhaust channel 4 .

For the convenience of passing the gas to be sampled after the first cyclone separation into the second centrifugal separation chamber 3, the particle removal device can also include a second passage 7, one end of the second passage 7 communicates with the first centrifugal separation chamber 2, and the other One end communicates with the second centrifugal separation chamber 3 , so that the gas to be sampled after the first cyclone separation is passed into the second centrifugal separation chamber 3 .

For the convenience of passing the second particles separated by the second centrifugal separation chamber 3 into the exhaust passage 4, the particle removal device can also include a third passage 8, one end of the third passage 8 communicates with the second centrifugal separation chamber 3, and the other One end communicates with the exhaust channel 4 to pass the second particles separated by the second centrifugal separation chamber 3 into the exhaust channel 4 .

In order to facilitate the passage of the gas to be sampled after the second cyclone separation into the detection channel 5, the particle removal device may also include a fourth channel 9, one end of the fourth channel 9 communicates with the second centrifugal separation chamber 3, and the other end communicates with the detection channel 5. The channel 5 is connected so that the gas to be sampled after the second cyclone separation is passed into the detection channel 5 .

In order to facilitate the monitoring of the flow rate of the gas to be sampled into the detection channel 5, optionally, the particle removal device further includes a flow sensor 10, which is arranged in the fourth channel 9 for detecting the gas to be sampled into the detection channel 5. The flow rate of the sampled gas.

In order to facilitate the introduction of the gas to be sampled into the negative pressure intake channel 1, optionally, the particle removal device also includes a negative pressure pump, which is used to evacuate the negative pressure intake channel 1, so as to carry out the sampling process under negative pressure. Negative pressure is generated in gas channel 1.

In order to speed up the discharge of the first particles and the second particles to the outside, optionally, the particle removal device further includes an exhaust fan, which is arranged at the outlet of the exhaust passage 4 .

In order to prevent impurities from entering the negative pressure intake passage 1 , optionally, the particle removal device further includes a filter, which is arranged at the inlet of the negative pressure intake passage 1 .

In order to control the opening and closing of the negative pressure intake channel 1, the exhaust channel 4 and the detection channel 5 respectively, optionally, the inlet of the negative pressure intake channel 1 is provided with a first valve, and the outlet of the exhaust channel 4 is provided with a second valve. Two valves, the outlet of the detection channel 5 is provided with a third valve.

The particle removal device provided in this embodiment, the gas to be sampled is fed through the negative pressure inlet channel 1, and the gas to be sampled is subjected to cyclone separation for the first time through the first centrifugal separation chamber 2 communicated with the negative pressure inlet channel 1 to separate The first particulate matter in the gas to be sampled whose particle size is greater than the first preset particle size value is extracted, and the gas to be sampled after the first cyclone separation is subjected to a second centrifugal separation chamber 3 communicated with the first centrifugal separation chamber 2. The secondary cyclone separation is to separate the second particles whose particle size is larger than the second preset particle size value in the gas to be sampled after the first cyclone separation, and the first centrifugal separation chamber 2 is separated through the exhaust channel 4 respectively. The first particulate matter and the second particulate matter separated by the second centrifugal separation chamber 3 are discharged to the outside, and the gas to be sampled after the second cyclone separation is passed through the detection channel 5 into the gas analysis instrument, which has low maintenance cost, small size, and easy integration and installation , no interference to gas measurement results.

Note that the above are only preferred embodiments of the present invention and the applied technical principles. Those skilled in the art will understand that the utility model is not limited to the specific embodiments here, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the utility model. Therefore, although the utility model has been described in detail through the above embodiments, the utility model is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the utility model. The scope of the present invention is determined by the appended claims.

Claims (10)

1. A particulate removal device, comprising:

the negative pressure gas inlet channel (1) is used for introducing gas to be sampled;

the first centrifugal separation chamber (2) is communicated with the negative pressure air inlet channel (1) and is used for performing primary cyclone separation on the gas to be sampled so as to separate first particulate matters with the particle sizes larger than a first preset particle size value from the gas to be sampled;

the second centrifugal separation chamber (3) is communicated with the first centrifugal separation chamber (2) and is used for carrying out secondary cyclone separation on the gas to be sampled after the primary cyclone separation so as to separate second particulate matters with the particle size larger than a second preset particle size value in the gas to be sampled after the primary cyclone separation;

an exhaust passage (4), one end of the exhaust passage (4) is communicated with the first centrifugal separation chamber (2) and the second centrifugal separation chamber (3) respectively, and the other end of the exhaust passage is communicated with the outside, so as to discharge the first particulate matters separated from the first centrifugal separation chamber (2) and the second particulate matters separated from the second centrifugal separation chamber (3) to the outside respectively;

and one end of the detection channel (5) is communicated with the first centrifugal separation chamber (2), and the other end of the detection channel (5) is communicated with a gas analysis instrument so as to introduce the gas to be sampled after the second cyclone separation into the gas analysis instrument.

2. The particulate matter removing device according to claim 1, further comprising a first passage (6), one end of the first passage (6) communicating with the first centrifugal separation chamber (2) and the other end communicating with the exhaust passage (4) to pass the first particulate matter separated from the first centrifugal separation chamber (2) into the exhaust passage (4).

3. The particulate matter removing device according to claim 1, further comprising a second passage (7), one end of the second passage (7) communicating with the first centrifugal separation chamber (2) and the other end communicating with the second centrifugal separation chamber (3) to pass the gas to be sampled after the first cyclone separation into the second centrifugal separation chamber (3).

4. The particulate matter removing apparatus according to claim 1, further comprising a third passage (8), one end of the third passage (8) communicating with the second centrifugal separation chamber (3) and the other end communicating with the exhaust passage (4) to pass the second particulate matter separated in the second centrifugal separation chamber (3) into the exhaust passage (4).

5. The particulate matter removing device according to claim 1, further comprising a fourth passage (9), wherein one end of the fourth passage (9) is communicated with the second centrifugal separation chamber (3), and the other end is communicated with the detection passage (5), so that the gas to be sampled after the second cyclone separation is introduced into the detection passage (5).

6. The particulate matter removing device according to claim 5, further comprising a flow sensor (10), wherein the flow sensor (10) is disposed in the fourth channel (9) for detecting the flow of the gas to be sampled which is passed into the detection channel (5).

7. The particulate matter removing device according to claim 1, further comprising a negative pressure pump for evacuating the negative pressure intake passage (1) to generate a negative pressure in the negative pressure intake passage (1).

8. The particulate matter removing device according to claim 1, further comprising an exhaust fan provided at an outlet of the exhaust passage (4).

9. The particulate matter removing device according to claim 1, further comprising a filter provided at an inlet of the negative pressure intake passage (1).

10. The particulate matter removing device according to any one of claims 1 to 9, wherein an inlet of the negative pressure intake passage (1) is provided with a first valve, an outlet of the exhaust passage (4) is provided with a second valve, and an outlet of the detection passage (5) is provided with a third valve.

Images