How to maintain the flow rate of the dust collection pipe, how the dust removal technology determine

In the design of dust removal equipment, it is necessary to take into account the factors of dust accumulation prevention in the dust removal pipeline, but because in the actual working conditions, because of the structural characteristics such as the bend of the pipeline, the flue gas dust enters and then encounters temperature changes, pipe walls, etc., condensation may be formed, so it is very likely to form dust accumulation.

Nowadays, the dust removal pipeline cleans the dust in compressed air cleaning, vacuum cleaning, sonic cleaning and common manual cleaning.

Let's talk about the two main types of manual ash cleaning and pipeline acoustic cleaning.

First of all, let's talk about manual ash cleaning, if the dust collector is manually cleaned, it is necessary to lay the staff on schedule to start cleaning the ash from the cleaning hole, and the design should be considered on the side of the dust removal pipe, and there can be no air leakage at the cleaning hole. Air leakage detection is a part to consider when you accept the dust collector, if there is an air leak, this will also have an impact on the dust removal effect, and it will also cause the flow rate in the dust collector pipe to decrease, which will lead to more dust accumulation.

It should also be mentioned that about the dust removal pipe with a relatively large diameter, it is necessary to set up a few more cleaning holes, which should be discussed by the customer and the engineer, and it is still set at the end or elbow, and some rubber plate liners should be added. River Beijing up to dust removal.

Let's talk about the cleaning of pipe sound waves. This is to install a sonic plugging aid device at the inlet flue, after the dust removal system works, this equipment will generate a vibrating force, which can make the smoke and dust peel off from the inner wall of the dust removal pipe, so as to reduce the amount of smoke and dust accumulation. It not only reduces the labor cost, but also installs this accessory without pollution and cleanliness.

River Beijing up to dust removal.

Then it is necessary to ensure the flow rate, and only by ensuring the flow rate of the air can the flow rate be guaranteed.

Air duct: In the project, the medium is approximately regarded as a non-hole lead compressible fluid, and the economic flow rate is selected, and the diameter of the pipeline can be pushed out if there is a cubic meter and flow rate next to the flow barrier. Of course, it is better and easier to consult the ventilation and dust removal design manual.

Because the system calculation also needs to consider local resistance, resistance along the way, vertical height of the pipeline, temperature, medium density and other factors, some of which can be balanced and ignored, and a certain coefficient is given. That's it.

The flow rate of the dust removal pipe in the factory is generally related to the air volume of the dust collector and the length of the pipe.

How much is the strongest flow rate of the dust removal air cooling tube cleanser, and there is not much country to have with his tube air cleansing.

What is the best wind energy pipe in the face of six every day?Why do they use this?What the hell is this?

This should be calculated by looking at the size and type of the entire device.

Flue length? Density of flue gases?

The smoke outlet is open to the atmosphere, and the outlet is generally considered to be the atmospheric pressure.

Viscosity coefficient of gas.

Coefficient of friction of the inner wall of the pipe.

In fact, the pressure difference is the resistance along the way.

You read the book on fluid mechanics I forgot I don't have a book at hand Li Xin Hehe.

Hydraulic calculations for pipelines include hydraulic calculations for long pipes and hydraulic calculations for short pipes. The difference is that the latter ignores the local head loss in the calculation and only considers the head loss along the way. (Head loss can be understood as the frictional force of the relative motion of a solid).

Taking the commonly used free outflow of long pipes as an example, the calculation formula is as follows:

H=(V 2*L) (C 2*R), where H is the water head, which can be converted by pressure, L is the length of the pipe, V is the flow velocity of the outflow of the pipe, R is the hydraulic radius R=Pipe section area Inner wall perimeter = R 2, C is the Xie Cai coefficient C=R (1 6) N,

For large particles and large density of dust, the general wind speed should be higher than the minimum wind speed, so that the dust removal system can run smoothly, and will not cause dust accumulation and easy blockage in the dust removal pipe network, of course, the wind speed can not be too high, which will increase the system resistance, increase the operating power of the fan, and increase the energy consumption; For the case that the dust particle size is small, the density is small, and the dust volume is not large, the wind speed can be ...... smaller

The wind speed determined by our engineering is generally calculated based on empirical values, and the working conditions are different, and the values will be different. After selecting the wind speed according to the dust removal needs, the pipe diameter is calculated according to the air volume, and the selection of the pipe diameter can be slightly larger, because there is a pipe pressure loss.

The flue gas velocity of the electrostatic precipitator in non-ferrous metallurgical enterprises is generally reachable in the electric power and cement industries, 1 in sintering and raw material plants, and 1 in chemical plants.

On the premise of ensuring the efficiency of dust removal, the flow rate is large, which can reduce the equipment and save investment. The flue gas velocity of the electrostatic precipitator in non-ferrous metallurgical enterprises is generally reachable in the electric power and cement industries, 1 in sintering and raw material plants, and 1 in chemical collapse plants. The choice of the flow rate is also related to the structure of the dust collector, and the flue gas velocity of the plate without wind shield groove and the hanging hammer corona electrode should not be too large.

The flue gas flow rate affects the selected dust collector section, and also affects the length of the dust collector, when the flue gas residence time is the same, the flow rate is low, the dust collector needs a longer one, and the group should also consider the position conditions of the dust collector and the length and width ratio of the dust collector itself when determining the flow rate.

Because the flue gas velocity in the electric field increases, the displacement speed can be increased, therefore, the flue gas velocity is not as low as possible, and the determination of the flue gas velocity should be subject to the best comprehensive technical and economic indicators.