Coal fired power plant bag filter - Zhengzhou dust collector detailed introduction

The bag filter for coal-fired power plants - Zhengzhou dust collector has technologies such as low-pressure pulse dust cleaning. High filtration efficiency, low operating resistance, long filter bag life, and easy use and maintenance. It is an efficient dust removal equipment designed by Huakang Zhongtian Environmental Protection based on years of engineering and technical experience in the design, manufacturing, and application of long bag pulse bag filters for high-temperature and complex flue gas treatment. It is designed for the characteristics of high temperature and large processing air volume of coal-fired boiler flue gas. This type of bag filter equipment for coal-fired power plants uses high-temperature resistant and corrosion-resistant filter materials; Module combination and unique low resistance filter bag structure; Anti thermal deformation and high air tightness design can meet the needs of flue gas dust removal for coal-fired power generation units of various scales.

Composition and working principle of bag filter for coal-fired power plants

Composition structure:

Coal fired power plant bag filter - Zhengzhou dust collector module combination design, each model is composed of 8-40 filter units combined. The core filtration unit consists of filter bags, filter bag frames, and flower plates, installed inside the filtration box. Each unit has a total of 240 filter bags with a diameter of 160 × 8m and a filtration area of 960m2; The clean air chamber is installed on the upper part of the filter box, equipped with an inspection door, an air outlet duct, and a dust cleaning spray pipe; The lower ash hopper is equipped with an air inlet branch pipe and an inspection door; The pulse blowing system includes a distribution box, pulse valve, blowing pipe, etc. The dust collector unit module is arranged in double or multiple rows in parallel, with an inlet and outlet air duct set in the middle of the two columns.

Working principle:

The dusty flue gas enters the air duct through the middle air inlet. Under the action of the airflow distribution mechanism, the flue gas is evenly distributed into the inlet ducts of each filtering unit. The folding of the baffle allows larger dust particles to directly fall into the ash hopper due to inertia and gravity, while the remaining dust particles rise with the airflow and enter the filtering chamber. Under the filtering effect of the dust cake on the surface of the filter bag, the dust particles of the flue gas are blocked on the outside of the filter bag. The purified flue gas enters the clean air chamber from the inside of the filter bag and converges to the exhaust manifold, and then is discharged into the atmosphere through the system fan.

　　Coal fired power plant bag filter - Zhengzhou dust collectorAdopting a PLC control system, according to the needs of smoke and dust treatment process, differential pressure control and timed control can be selected for back blowing and dust cleaning. The pressure difference control mechanism refers to the accumulation of dust on the outer surface of the filter bag as the filtration process continues, causing the filtration resistance to continuously increase. The operating resistance of the dust collector also gradually increases. When the resistance of the dust collector reaches the preset value (usually 1200-1500Pa), a control signal is issued to start the reverse blowing cycle. The dust collector repeatedly executes the cycle of "spraying and cleaning dust settling filtering" until the resistance of the dust collector decreases to the set lower limit of resistance (usually 1000Pa). The pressure difference control mechanism can keep the resistance of the dust collector within a certain range, in order to achieve dust removal efficiency and the lowest operating energy consumption. Timed control refers to arranging timed blowback based on empirical values, generally used to handle systems with relatively stable operating conditions.