SU1773452A1 - Pulse-regeneration hose filter - Google Patents

Description

The invention relates to the field of gas purification from solid dispersed phase, can be used for gas purification from dust in metallurgy, chemical industry, building materials industry, power system.

Known bag filter, comprising a housing with a dust bin, filter bags and tube boards separating the filter into dirty and clean gas chambers, high-speed valves, and impulse tubes with purge nozzles (ed. St. USSR No. 1050727, publ. 30, 10.1983, BI No. 40, class B 01 D 46/02). Blowing nozzles are located at the ends of the sleeves and face their outlet sections to the outside of the sleeves. In such a filter, the sleeve space is kept Clean, which simplifies the operation of the filter.

A disadvantage of the known filter is the following. When cleaning gases from fine dusts and dusts prone to sticking, filters must be equipped with bunkers, the walls of which have a significant angle of inclination. The required angle of inclination of the walls is different for different types of dust, but on average is about 70 °. This increases the vertical dimensions of the filter by almost half, entails an increase in material consumption, as a result of which the capital costs of gas treatment plants increase.

The aim of the proposed invention is to reduce the cost of gas treatment facilities by reducing the metal consumption of the filter and reducing the time for regeneration.

This goal is achieved in that in a bag filter with pulsed regeneration, comprising a housing with nozzles for supplying dusty and purified gas, filter sleeves and a dust bin secured between the tube sheets, tube plates are installed vertically with the formation of a vertical gas supply channel, with the sleeves facing the channel with its inlet sections, and the dust bin is placed under the channel.

1773452A1

The proposed bag filter is shown schematically in the drawing and includes a housing 1, in which pipe boards 2 are vertically mounted, which together with horizontally arranged filter bags 3 divide the housing 1 into dirty and clean gas chambers. Tube boards 2 form a vertical channel, directly under which a dust collector 4 is installed. The filter is equipped with a pulse regeneration system with injection chambers 5, pulse tubes 6, on which quick-acting valves 7 and nozzles 8 are installed. The output sections of which are turned into a vertical channel formed by the boards 2. The filter is equipped with a dirty gas pipeline 9 and a clean gas pipeline 10 on which a shut-off valve 11 is installed. An atmospheric valve 12 is installed on the filter housing 1.

The filter is as follows. Dusty gas enters the filter housing 1 through the dirty gas pipeline 9 and enters the vertical distribution channel formed by the tube sheets 2. From the vertical channel, the gas is distributed through the filter arms 3, filtered through which it is cleaned of dust and removed from the filter housing 1 through the pipe 10 clean gas. Upon reaching the maximum allowable hydraulic resistance of the filter, it is regenerated. To do this, the shut-off valve 11 closes, the atmospheric valve 12 opens, and the regenerated section is removed from the filtration mode. Then, for 0.1 s, high-speed valves 7 are opened, and a pulse of compressed gas is supplied through injection nozzles 6 through nozzles 8 to the injection chambers 5, which creates a vacuum inside the filter bags. The created vacuum ensures the removal of the dust layer from the inner surface of the filter bags. Since the regenerated section is connected via conduit 9 to the dirty gas collector, i.e. with the suction pipe of the draft device, then due to the vacuum created by the draft device, dust is removed from the hoses into the vertical channel. In the event that the amount of rarefaction created by the draft device in the dirty gas pipeline is not enough for return production, the filter must be equipped with a separate return device to remove dust from the sleeves. When dust is removed from the arms into a vertical channel formed by tube plates 2, a high dust concentration is created in the latter, which promotes coagulation. Coagulation accelerates the deposition of dust in the dust hopper 4. After 20-30 seconds after the pulse is applied, the atmospheric valve 12 closes. Then, dust settles in the hopper 4 within 15-20 seconds, after which the shut-off valve 11 opens and the filtering process resumes.

The application of the alleged invention will reduce the cost of the filter by reducing the metal consumption and increasing the service life of the filter fabric of the sleeves.

Claims (1)

Claim A bag filter with pulsed regeneration, comprising a housing with nozzles for supplying dusty and purified gas, filter sleeves and a dust bin secured between the tube sheets, characterized in that, in order to reduce costs by reducing the metal consumption and reducing the time for regeneration, tube boards are installed vertically with the formation of a vertical gas supply channel, with the sleeves facing the channel with their inlet sections, and the dust bin is located under the channel.