The main application fields of cyclone dust collector and what kind of dust containing waste gas is

Cyclone dust collector is a type of dust removal device. The dust removal mechanism is to make the dust-containing air flow rotate, with the help of centrifugal force to separate the dust particles from the air flow and trap them on the wall, and then with the help of gravity to make the dust particles fall into the ash hopper. Each component of the cyclone dust collector has a certain size ratio, and the change of each proportion relationship can affect the efficiency and pressure loss of the cyclone dust collector, in which the diameter of the dust collector, the size of the air inlet, and the diameter of the exhaust pipe are the main influencing factors.

When using it, it should be noted that when a certain limit is exceeded, the favorable factors can also be transformed into disadvantages. In addition, some factors are beneficial to improve the efficiency of dust collection, but will increase the pressure loss, so the adjustment of various factors must be taken into account.

The cyclone dust collector is composed of an intake pipe, an exhaust pipe, a cylinder, a cone and an ash hopper. Cyclone dust collectors have a simple structure, easy to manufacture, install and maintain management, and have low equipment investment and operating costs, and have been widely used to separate solid and liquid particles from gas streams, or from liquids. Under normal operating conditions, the centrifugal force acting on the particles is 5 2500 times that of gravity, so the efficiency of the cyclone is higher than that of the gravity settling chamber.

It is suitable for the removal of non-viscous and non-fibrous dust, mostly used to remove particles above 5 m, and the parallel multi-tube cyclone dust collector device also has a dust removal efficiency of 80 to 85% for particles of 3 m.

Cyclone dust collector.

Cyclone dust collector is mainly used in the industrial field to treat waste gas containing solid particles, such as dusty waste gas generated in the industrial production process of coal, cement, metallurgy, chemical industry, building materials and other industries. Cyclone dust collectors can effectively remove particles larger than 5 microns in diameter, and the removal effect of particles smaller than 5 microns is relatively poor, so they usually need to be used in conjunction with other dust collection equipment such as electrostatic precipitators or baghouses to achieve better dust removal results.

Answer]: B mechanical dust collectors include gravity settling chambers, inertial dust collectors and cyclone dust collectors, etc. The mechanical dust collector is used to deal with dust with high density and coarse particles, and is used as a pre-removal of high-efficiency dust collectors in the multi-stage dust removal process.

The gravity sedimentation chamber is suitable for capturing dust particles with a large particle size of less than 50 m, the inertial dust collector is suitable for capturing dust particles with a particle size of more than 10 m, and the cyclone dust collector relies on centrifugal force to remove dust and is suitable for capturing dust particles with a particle size of more than 5 m.

Briefly describe the dust removal process in the cyclone dust collector, the working process of the cyclone dust collector is that when the dust-containing gas enters the cyclone separator from the tangential air inlet, the air flow will change from linear motion to circular motion. The vast majority of the rotating airflow flows along the wall of the vessel from the cylinder in a spiral downward toward the cone, which is often referred to as exocyclotronic airflow. The centrifugal force generated by the dusty gas during rotation throws dust particles with a relative density greater than the gas towards the wall of the device.

Once the dust particles are in contact with the wall, they lose the radial inertial force and fall along the wall by downward momentum and downward gravity and enter the ash discharge pipe. When the swirling descending external gas reaches the cone, it moves closer to the center of the collector due to the contraction of the cone. According to the principle of invariant "rotational moment", the tangential velocity continues to increase, and the centrifugal force on the dust particles also increases.

When the air flow reaches a certain position at the lower end of the cone, it will turn from the middle of the cyclone separator in the same direction of rotation from the bottom to the top, and continue to do spiral flow, that is, the internal spiral airflow. Finally, the purified gas is discharged out of the pipe through the exhaust pipe, and a part of the dust particles that have not been collected are also discharged. Hope it helps!

The factors that affect the efficiency of a cyclone dust collector are as follows:

1.Dust properties: The physical properties and chemical balance properties of different dusts are different, and their density, charge, particle size, surface properties, etc. will affect the efficiency of the cyclone dust collector.

2.Inlet air velocity: The efficiency of the cyclone dust collector is directly proportional to the inlet air velocity, the larger the inlet air velocity, the more obvious the centrifugal effect of the dust on the cyclone dust collector, and the dust can be quickly separated.

3.Separator size: The size of the separator of the rotary shirt vertical air dust collector determines the size of its centrifugal force, the larger the size of the separator, the greater the centrifugal force, and the higher the dust removal efficiency.

4.Cyclone dust collector structure: The structural form and design parameters of the cyclone dust collector will also affect its efficiency, such as cyclone bypass ratio, cyclone cylinder height-to-width ratio, etc.

5.Operating environment: The temperature, humidity and pressure of the operating environment of the cyclone dust collector will also affect its efficiency, and too high or too low temperature and high humidity and too high pressure will affect its performance.

It should be noted that the above factors will affect each other, and the design and adjustment of cyclone dust collectors also need to consider the influence of various factors.

1.Influence of the geometric size of the cyclone dust collector: In the geometric size of the cyclone dust collector, the diameter of the cyclone dust collector, the gas inlet, and the shape and size of the exhaust pipe are the most important influencing factors.

2.The influence of cyclone dust collector gas parameters on the performance of the dust collector: including the influence of gas flow number, gas dust concentration, cyclone dust collector gas moisture content, gas density, viscosity, mountain pressure and temperature;

3.The influence of the physical properties of the cyclone dust collector dust on the dust collector;

4.The influence of the roughness of the inner wall of the cyclone dust collector: the dust particles concentrated near the wall will cause swirl due to the rough surface, and the potato cavity cyclone dust collector will throw some dust particles into the rising air flow and enter the exhaust pipe, reducing the dust removal efficiency.

Answer]: ACDE

In terms of use conditions, the main factors affecting the performance of the cyclone air collector are: inlet wind speed, cylinder diameter, dust properties, dust-containing gas properties, and tightness at the bottom of the dust collectorHowever, the outlet wind speed is not included.

14 Answer: BCE. Vibration can be divided into free vibration, forced vibration and self-excited vibration according to the number of causes of its productionAccording to the law of its vibration, it can be divided into simple harmonic vibration, non-simple harmonic vibration and random vibration.

According to performance, it is divided into:

a) High-efficiency cyclone dust collector, which has a small cylinder diameter and is used to separate finer dust;

b) High flow cyclone dust collector, with a large diameter in simplified body, is used to handle a large gas flow rate, and its dust removal efficiency is low;

c) A universal cyclone dust collector in between the above two to handle appropriate medium gas flow rates with a 70% 90% dust collection efficiency. Selection Instructions Model Specification Marking Example Description LCM-D G-11000 L: Standard Nomenclature C:

Long bag M: Pulse D: Low pressure type G:

The high-pressure type is divided into the following according to the combination form:

a) Ordinary cyclone dust collector;

b) Special-shaped cyclone dust collector, the shape of the cylinder has changed, and the dust removal efficiency is improved;

c) Double cyclone dust collector, put two dust collectors with different performance together;

d) Benchtop cyclone dust collector with better comprehensive performance.

According to the installation situation, it is divided into internal cyclone dust collector (installed in the reactor or other unequipped inside), external cyclone dust collector, vertical and horizontal, single tube and multi-tube cyclone dust collector.

1 Axial flow rotary dust collector: axial flow DC type and axial flow reverse rotation type.

2 According to the gas flow status: Cut-flow rotary cyclone dust collector: the commonly used types are direct entry type and screw shell type. The dusty gas is introduced tangentially from the sides of the cylinder.

3.According to the structural form, it is divided into: :

The selection of cyclone dust collector generally adopts calculation method and empirical method.

Calculation method: Calculate the dust removal efficiency from the inlet concentration C0 and the outlet concentration CE (or emission standard).

Choose the structural type;

According to the classification efficiency d (classification efficiency curve) of the selected dust collector and the particle size frequency distribution f0 of the purified dust, t is calculated, if t is >, that is, the requirements are met, otherwise it is recalculated according to the requirements.

Determine the model specifications.

Calculate the pressure loss.

You can distinguish by type, so that the distinction is more obvious.

1. Axial flow rotary dust collector: axial flow DC BAI type and axial flow reverse rotation type.

2 According to the DU gas flow status: Shear flow rotary cyclone dust collector: the commonly used types are direct entry type and screw shell type. The dusty gas is introduced tangentially from the sides of the cylinder.

The dust collection efficiency of a cyclone dust collector is related to the particle size of the dust particles.

The structural dimensions of the dust collector.

The smaller the diameter of the simplified body, the greater the centrifugal force on the dust particles and the higher the dimensional efficiency at the same tangential speed. The change of the height of the simplified body has no obvious effect on the dust removal efficiency, and the appropriate lengthening of the height of the vertebral body is conducive to improving the dust removal efficiency.

Dust particle size and density.

Since the centrifugal force of the dust particles is proportional to the cubic of the particle size, and the radial gas resistance is only proportional to the primary square of the particle size, large particle sizes are easier to capture than small particle sizes. The dust removal efficiency increases with the increase of the true density of dust particles, and the dust removal efficiency decreases when the density is small and difficult to separate.