Liquid film cyclone type biological aerosol continuous sampler

Abstract

The utility model discloses a liquid film cyclone type biological aerosol continuous sampler which adopts a cyclone sampling pipe and further comprises an air inlet pipe, the upper part of the cyclone sampling pipe is cylindrical, and the lower part of the cyclone sampling pipe is conical funnel-shaped; an exhaust pipe communicated with the rotational flow sampling pipe is vertically arranged at the top end of the upper part of the rotational flow sampling pipe; the air inlet pipe is tangentially communicated with the side surface of the upper part of the cyclone sampling pipe; a liquid film inlet is horizontally formed in the upper part of the rotational flow sampling pipe, and adopts a circular ring structure with holes in the periphery; and the bottom end of the lower part of the rotational flow sampling pipe is connected with a hydrosol outlet pipe. The device is high in integration level, compact in structure and capable of carrying out on-site rapid deployment and continuous sampling.

Description

Technical Field

[0001] The utility model specifically relates to a liquid film cyclone type bioaerosol continuous sampler, belonging to the field of atmospheric environment particle sampling instruments. Background Art

[0002] Common types of bioaerosols include bacteria, fungi, viruses, pollen, animal debris, and metabolites of microorganisms. The particle size of these biological particles usually ranges from 1 nm to 100 μm, and their concentration varies widely. The spread and diffusion of bioaerosols will not only directly affect air quality, but also cause the spread of diseases, such as common fungi and bacteria bioaerosols in indoor and outdoor environments. These events caused by bioaerosols have a significant impact on human life safety.

[0003] Therefore, the study of bioaerosols is particularly important. Through research, people can understand the characteristics and distribution patterns of bioaerosols, which in turn helps to understand air quality. The study of bioaerosols must first collect air samples, and since bioaerosol particles are small, a bioaerosol sampler that can conveniently and quickly and continuously sample is required.

[0004] The essence of bioaerosol sampling is the process of separating microbial particles from the airflow. Common methods include filtration sampling, impact sampling, liquid impact sampling, and electrostatic sampling. However, these sampling methods have certain inherent disadvantages, such as low microbial culturability, low physical capture efficiency caused by particle rebound and resuspension effects, etc. These disadvantages may affect the monitoring results of bioaerosols and make them slightly deviate from the actual situation.

[0005] Cyclone dust collector is a type of dust removal device. Its mechanism is to make the dust-laden airflow rotate, separate the dust particles from the airflow and capture them on the wall by centrifugal force, and then make the dust particles fall into the ash hopper by gravity. Each component of the cyclone dust collector has a certain size ratio. Every change in the ratio relationship can affect the efficiency and pressure loss of the cyclone dust collector. Among them, the diameter of the dust collector, the size of the air inlet, and the diameter of the exhaust pipe are the main influencing factors. Summary of the invention

[0006] The utility model aims to provide a liquid film cyclone bioaerosol continuous sampler which can be used for emergency disposal and continuous sampling, and uses liquid to quickly capture bioaerosol particles in the air to form a hydrosol, which is suitable for various indoor and outdoor bioaerosol sampling research environments.

[0007] The technical solution of the utility model is as follows:

[0008] A liquid film cyclone bioaerosol continuous sampler, the continuous sampler adopts a cyclone sampling tube, and also includes an air inlet pipe, a water inlet pipe, a liquid film inlet and a hydrosol outlet pipe;

[0009] The upper part of the swirl sampling tube is cylindrical, and the lower part is conical funnel-shaped, wherein the cylindrical part is separated by a circular ring-shaped liquid film inlet with holes on all sides to form an upper and lower part. The inner wall of the swirl sampling tube is smooth, and the cylindrical main body and the conical funnel-shaped lower part can be formed as one piece, or can be two parts tangently spliced, which is convenient for disassembly and cleaning. An exhaust pipe connected to the swirl sampling tube is vertically arranged at the top of the upper part of the swirl sampling tube; the air inlet is tangentially connected to the side of the upper part of the swirl sampling tube; a liquid film inlet is horizontally arranged inside the upper part of the swirl sampling tube, and the liquid film inlet adopts a circular ring structure with holes on all sides; the lower bottom end of the swirl sampling tube is connected to a hydrosol outlet pipe.

[0010] The hydrosol outlet pipe can be connected to a collection device or connected to a detection instrument using a hose to achieve continuous and efficient sampling.

[0011] The air inlet pipe is a square short pipe, and the water inlet pipe is a round short pipe.

[0012] The air inlet pipe and the water inlet pipe located at the upper part of the cyclone sampling tube are made of the same material as the cylindrical part of the cyclone sampling tube, and the cyclone sampling tube is a metal tube.

[0013] The hydrosol outlet pipe is tightly connected to the bottom end of the cyclone sampling pipe through a threaded structure.

[0014] Preferably, a pipe sleeve is provided at the water outlet of the water inlet pipe, surrounding the exhaust pipe. The lower part of the pipe sleeve has many evenly distributed small water outlet holes to facilitate the formation of a liquid film under the water flow, which collides with the aerosol particles in the cyclone sampling tube to ensure the uniformity of the liquid film distribution. The material is consistent with the main body of the cyclone sampling tube.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model utilizes air delivery from the air inlet pipe or air extraction from the exhaust pipe to drive the air to enter the cyclone sampling tube along the tangent direction of the air inlet pipe to form a high-speed cyclone to collect ambient air. Air particles are driven by the cyclone and enter the cyclone sampling tube from the air inlet along the tangent line, thereby reducing sample loss caused by liquid splashing and providing more representative bioaerosol liquid samples for subsequent qualitative and quantitative studies of bioaerosols.

[0017] 2. Cyclone sampling captures a large amount of particles in the ambient air into the cyclone sampling tube, collides with the liquid film to obtain a higher concentration of hydrosol samples, which reduces the detection limit of microorganisms in the air and makes it easier to study particles in the ambient air;

[0018] 3. Liquid film sampling causes the aerosol particles in the air to collide with the liquid film formed on the wall of the cyclone sampling tube from the liquid film inlet and then be captured to form a hydrosol, which reduces the wear of the particles on the wall of the cyclone sampling tube;

[0019] 4. Liquid film sampling collects aerosol particles into the sampling liquid. The particles are evenly distributed with the flow of the sampling liquid, and the formed hydrosol makes the particles not easily destroyed;

[0020] 5. Liquid film sampling reduces the suspension effect of aerosol particles. At the same time, the sampling liquid is less volatile, so long-term continuous sampling can be carried out. There is a tube connected to the hydrosol outlet pipe, which is directly connected to the detection instrument, so continuous and efficient detection can be carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a 3D structural schematic diagram of the utility model liquid film cyclone type bioaerosol continuous sampler;

[0022] Figure 2 It is a 2D structural schematic diagram of the utility model liquid film cyclone type bioaerosol continuous sampler;

[0023] Figure 3 yes Figure 1 A partial schematic diagram of the inlet of the middle liquid membrane;

[0024] In the figure, 1-air inlet pipe, 2-water inlet pipe, 3-cyclone sampling tube, 4-exhaust pipe, 5-liquid film inlet, 6-hydrosol outlet pipe, 7-detector, 8-tube sleeve. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below through embodiments in conjunction with the accompanying drawings.

[0026] like Figure 1-Figure 3 As shown, a liquid film cyclone bioaerosol continuous sampler, the continuous sampler adopts a cyclone sampling tube 3, and also includes an air inlet pipe 1, a water inlet pipe 2, a liquid film inlet 5 and a hydrosol outlet pipe 6;

[0027] The upper part of the cyclone sampling tube 3 is cylindrical, and the lower part is a conical funnel shape, wherein the cylindrical part is separated by a circular ring structure liquid film inlet 5 with holes all around to form an upper and lower part. The inner wall of the cyclone sampling tube 3 is smooth, and the cylindrical main body and the conical funnel-shaped lower part can be integrally formed, or can be two parts tangently spliced ​​together, which is convenient for disassembly and cleaning.

[0028] An exhaust pipe 4 connected to the swirl sampling tube 3 is vertically arranged at the top of the upper part of the swirl sampling tube 3; the air inlet pipe 1 is tangentially connected to the side of the upper part of the swirl sampling tube 3; a liquid film inlet 5 is horizontally arranged inside the upper part of the swirl sampling tube 3, and the liquid film inlet 5 adopts a circular ring structure with holes opened on all sides; the lower bottom end of the swirl sampling tube 3 is connected to a hydrosol outlet pipe 6.

[0029] The hydrosol outlet pipe 6 can be connected to a collecting device or connected to a detector 7 using a hose to achieve continuous and efficient sampling.

[0030] The air inlet pipe 1 adopts a square short pipe, and the water inlet pipe 2 adopts a round short pipe.

[0031] The air inlet pipe 1 and the water inlet pipe 2 located at the upper part of the cyclone sampling tube 3 are made of the same material as the cylindrical part of the cyclone sampling tube 3. The cyclone sampling tube 3 is a metal tube or a plastic tube, and the inner wall of the tube is smoothed by spraying or polishing.

[0032] The hydrosol outlet pipe 6 is tightly connected to the bottom end of the cyclone sampling pipe 3 through a threaded structure.

[0033] like Figure 3 As shown, a pipe sleeve 8 is provided at the water outlet of the water inlet pipe, surrounding the exhaust pipe 4. The lower part of the pipe sleeve 8 has many evenly distributed small water outlet holes to facilitate the formation of a liquid film under the water flow, which collides with the aerosol particles in the cyclone sampling tube to ensure the uniformity of the liquid film distribution. The material is consistent with the main body of the cyclone sampling tube.

[0034] like Figure 1-Figure 3 As shown, the working principle and process of the utility model are as follows:

[0035] The air is driven by the air inlet pipe 1 to deliver air or the air exhaust pipe 4 to draw air, and the air enters the cyclone sampling tube 3 tangentially along the air inlet pipe 1 to form a high-speed cyclone to collect ambient air. Aerosol particles in the ambient air enter the cyclone sampling tube 3 to form a peripheral downward cyclone. At the same time, the liquid enters the liquid film inlet 5 of the annular structure from the water inlet pipe 2, and is driven by the high-speed cyclone to form a liquid film on the upper wall surface of the cyclone sampling tube 3. The aerosol particles in the air collide with the liquid film and are captured to form a hydrosol. The hydrosol carries the particles downward and enters the conical part of the cyclone sampling tube 3, and then to the hydrosol outlet pipe 6. The structure of this continuous sampler is similar to that of a cyclone separator. The separated air rebounds at the center of the cyclone sampling tube to form an upward cyclone and is discharged from the exhaust pipe 4.

Claims

1. A liquid film cyclone bioaerosol continuous sampler, characterized in that: The continuous sampler adopts a cyclonic sampling tube, and also includes an air inlet pipe, a water inlet pipe, a liquid film inlet and a hydrosol outlet pipe; The upper part of the swirl sampling tube is cylindrical, and the lower part is conical funnel-shaped; an exhaust pipe connected to the swirl sampling tube is vertically arranged at the top of the upper part of the swirl sampling tube; the air inlet pipe is tangentially connected to the side of the upper part of the swirl sampling tube; a liquid film inlet is horizontally arranged inside the upper part of the swirl sampling tube, and the liquid film inlet adopts a circular ring structure with holes opened on all sides; the lower bottom end of the swirl sampling tube is connected to a hydrosol outlet pipe.

2. The liquid film cyclone bioaerosol continuous sampler according to claim 1, characterized in that: The hydrosol outlet pipe is used to connect to a collecting device.

3. The liquid film cyclone bioaerosol continuous sampler according to claim 1, characterized in that: The hydrosol outlet pipe is used to connect a detection instrument.

4. The liquid film cyclone bioaerosol continuous sampler according to claim 1, characterized in that: The cyclone sampling tube is a metal tube.

5. The liquid film cyclone bioaerosol continuous sampler according to claim 1, characterized in that: The air inlet pipe is a square short pipe, and the water inlet pipe is a round short pipe.

6. The liquid film cyclone bioaerosol continuous sampler according to claim 1, characterized in that: The hydrosol outlet pipe is tightly connected to the bottom end of the cyclone sampling pipe through a threaded structure.

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