advantages of central dust collection system body structure resistance refers to the gas from the dust collector population to the dust collector inlet and outlet resistance. The basic structure is composed of centrifugal fan, dust removal box, dust collector, filter bag (filter cartridge) and microcomputer controller, etc. The dust is sucked into the dust collector box by the negative pressure of the fan through the dust suction pipe, and the coarse particle dust is filtered by the filter first and directly dropped to the dust collector by the filter, and the fine dust is captured by the filter on the outer surface. Clean gas is filtered, decomposed and purified by the filter element into the clean room, and then discharged from the outlet by the fan. The whole process of dust removal and filtration is the result of comprehensive effects such as gravity, inertial force, collision, electrostatic adsorption and screening.

Summarize the advantages of central dust collection system design calculation process:

First, select the correct design wind speed in the main loop through calculation and economic analysis, and design the pipe diameter and pressure loss value of each pipe in the main loop.

2. Calculate the pressure loss of each branch loop (pipe section) by setting the flow rate, reverse calculating the pipe diameter and calculating the wind pressure loss, and calculate the wind pressure balance rate of the main and branch loops at the joint point: η= (main loop wind pressure loss - branch loop wind pressure loss)/main loop wind pressure loss ×1 If η is within 10%, the calculation results are accepted, otherwise, re-adjust the design wind speed and pipe diameter for wind pressure balance calculation until η reaches the design goal.

Third, draw the pipe network calculation sketch, in order to facilitate calculation, node number and calculation parameters such as air volume, pipe length and local resistance coefficient of each pipe section can be indicated on the diagram.

Fourth, analyze the structural characteristics of the pipe network, and establish the combination relationship of each loop. Starting from the main loop (that is, the less favorable loop), the relevant calculation parameters of each pipe section are filled into the air duct design calculation table in the order of "main and second".

According to the dust collector's cleaning form is different, but also divided into different forms and installation, the spring skeleton used in a single dust collector is generally installed in the upper part of the dust collector, after the dust bag is installed, Then the worker enters the box of the single dust collector to fix the hook below the spring skeleton in turn, and the installation is more convenient. The spring skeleton has the flexibility, because the single dust collector is limited by the indoor space, the top of the single dust collector does not have the space to replace the dust skeleton, so the spring skeleton or (plug-in) multi-section dust skeleton is used in the design, the spring skeleton is easier to transport.

During normal operation, the dust containing gas enters the ash bucket by the air inlet. Due to the rapid expansion of the gas volume, some coarse dust particles fall into the ash bucket by inertia or natural settlement, and most of the remaining dust particles rise into the bag room with the air flow. After being filtered by the dust filter bag, the dust particles are retained on the outside of the filter bag, and the purified gas enters the upper box from the inside of the filter bag, and then is discharged into the atmosphere by the valve plate hole and the exhaust outlet, so as to achieve the purpose of dust removal. With the continuous progress of filtration, the dust collector resistance also rises, when the resistance reaches the value, the cleaning controller issues the cleaning command, first close the lifting valve plate, cut off the filter air flow; Then, the cleaning controller sends a signal to the electromagnetic pulse valve. With the electromagnetic pulse valve, the high-pressure reverse air flow used for cleaning is sent into the bag, and the dust filter bag is swollen and produces strong shaking, resulting in the dust on the outside of the filter bag to shake off and achieve the purpose of cleaning. Since the equipment is divided into several box areas, the above process is carried out box by box, when one box area is cleaned, the remaining box areas are still working normally, and the continuous normal operation of the equipment is normal. The reason why it can handle dust is that the cleaning time required for this strong cleaning is short (only 01~0.2s for a spray).

There are many kinds of advantages of central dust collection system, so its selection calculation is particularly important, improper selection, such as equipment is too large, will cause unnecessary flow costs. The single-machine dust collector is a small single-machine dust collector used in cement plant dust treatment. In order to meet the market demand of single dust collector, in order to meet the dust removal demand of small air volume and small space, the single dust collector manufactured can save user costs, and has been operated in the dust removal system of many cement factories, foundries and ceramics factories.

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