Dust removal filter for high-temperature flue gas

Abstract

The invention provides a dust removal filter for high-temperature flue gas, which comprises a metal shell and a filtering barrel, wherein the metal shell is provided with an air inlet, and the filtering barrel is arranged in the metal shell and provided with a sealed bottom. The dust removal filter for high-temperature flue gas is characterized in that a ceramic filtering barrel is used as the filtering barrel; a fan and a pressure alarm are added, wherein the fan is arranged in the metal shell and fixed on a top cover of the metal shell, and air holes and the pressure alarm are arranged on the top cover. The dust removal filter for high-temperature flue gas has high flue gas filtering precision, simple operation, long service life and no secondary pollution to environment.

Description

technical field [0001] The invention provides a high-temperature flue gas dust removal filter, which belongs to an environmental protection dust removal method. Background technique [0002] Flue gas filters mainly include high-performance mechanical dust collectors (such as cyclone dust collectors), electrostatic precipitators, acoustic agglomeration dust collectors placed in front of mechanical dust collectors, and high-performance barrier filters. The cyclone dust collector has the lowest operating cost, but it is generally used as a pre-dust removal equipment; the efficiency of the electrostatic precipitator can reach 90% to 99.6%, but there are still problems such as corona stability, material stability, and thermal expansion of the material; The agglomeration of dust in front of the cyclone increases the capacity of the cyclone, but it has not been used in industrial experiments. High-performance barrier filters can be divided into ceramic filters, granular bed filter...

AI Technical Summary

Problems solved by technology

The dust removal efficiency of the granular bed filter reaches 99%, but when it operates at high temperature, the bed layer is easy to clog; the ceramic filter uses a blower to pressurize the air intake, positive pressure dust removal, the blower is separated from the dust removal equipment, occupies a large area, and the ceramic filter is installed Afterwards, it cannot be moved, and the ceramic filter is mainly used for the purification of hot gas in IGCC power plants. The investment in equipment at one time is more than tens of millions. The operation is complicated and the investment is large. It is not suitable for high-temperature flue gas dust removal in small and medium-sized factories and mines.

Bag dust removal, because the bag can only be used at low temperature and cannot directly remove dust from high temperature flue gas; the patent CN2539563Y "flue gas dust removal device" uses water to treat flue gas, causing secondary pollution

Images