RU81094U1 - HOSE FILTER - Google Patents

Abstract

The proposal relates to devices for cleaning gases from solid impurities and can be used in non-ferrous metallurgy, chemical industry, building materials industry.

The objective of the utility model is to increase the reliability of the bag filter rocket, reduce the energy consumption for heating the bunker machine, and eliminate local overheating.

The problem is solved due to the fact that in a bag filter containing a sectional composite housing, clean and dirty gas chambers located in the housing, hoppers, filter bags fixed to the sleeve plate with open ends, a regeneration system including a compressed air receiver connected through a pulse diaphragm valve with distribution pipes with holes, each of which is directed to the open end part of the filter sleeve from the side of the purified gas manifold, each hopper is equipped with a device heating mounted on the hopper wall, the heating temperature does not exceed 200 ° C. The heating device may include a flexible heating tape glued to a metal panel and a temperature controller. 1 zpf 1 liter ill.

Description

The proposal relates to devices for cleaning gases from solid impurities and can be used in non-ferrous metallurgy, chemical industry, building materials industry.

A bag filter is known, including a sectional composite case, clean and dirty gas chambers located in the case, bunkers, filter bags fixed to the bag plate with open ends, a regeneration system including a compressed air receiver connected through a pulse diaphragm valve to distribution pipes with holes, each of which is directed to the open end part of the filter sleeve from the side of the purified gas manifold. (see SU AS No. 13b7842A3 class B01D 46/02).

A disadvantage of the known filter is that in this sleeve filter, a thermoelectric heater (TEN) is used to maintain the temperature of the walls of the hopper to prevent moisture condensation and hovering of hygroscopic dusts on the walls of the hopper. The use of a thermoelectric heater to heat the walls of the hopper leads to high local heating, high energy intensity and low heat transfer coefficient.

The objective of the utility model is to increase the reliability of the bag filter, reduce energy consumption for heating the walls of the bunkers, eliminating local overheating.

The problem is solved due to the fact that in a bag filter containing a sectional composite housing, clean and dirty gas chambers located in the housing, hoppers, filter bags fixed to the sleeve plate with open ends, a regeneration system including a compressed air receiver connected through a pulse diaphragm valve with distribution pipes with holes, each of which is directed to the open end part of the filter sleeve from the side of the purified gas manifold, each hopper is equipped with a device heating mounted on the hopper wall, the heating temperature does not exceed 200 ° C. Selected heating cases, as shown by tests, is optimal.

The heating device of each hopper may include a flexible heating tape glued to a metal panel and a temperature controller.

The supply of each bag filter hopper with a heating device ensures high reliability of the filter, reduces power consumption, distributes the heat evenly across the entire heated surface, eliminates local overheating. Figure 1 shows the described bag filter;

figure 2 - node a of figure 1

The bag filter comprises a housing 1 connected from below to the hoppers 2. With a bag 3, the housing is divided into a clean gas chamber 4 and a dirty gas chamber 5. The housing 1 comprises vertically oriented filtering bags 6 arranged in rows, fixed by open ends in the openings of the aforementioned bag plate 3. The bag filter also includes a pulse regeneration system for the bags 7, including a compressed air receiver 8 connected via a pulse

diaphragm valve with distribution pipes 9 facing their nozzles into filter bags, heating devices for bins 10.

The heating device includes a heating tape 11 glued to a metal panel 12, and a temperature controller 13.

Bag filter works as follows.

Dusty gas enters the bag filter into the dirty gas chamber 5, comes through the sleeves from the outside to the inside, while dust particles are trapped on the outer surface of the sleeves 6, and the cleaned gas enters the clean gas chamber 4. When the dusty gas passes through the filter cloth, the dust layer thickness on the surface of the sleeves increases, while the resistance to air movement increases and the filter capacity decreases, in order to avoid which dusty sleeves are regenerated by pulses of compressed air. After regeneration, the dust enters the hoppers 2 of the bag filter. At negative temperatures, the heating device turns on, the walls of the bins 2 are heated. The flexible metal strip has a large heating area, due to this, local overheating is eliminated. Condensation does not form on the heated walls of the bins, hygroscopic dust does not hang, and it is easily taken from the bunker. The heating temperature is selected depending on the temperature conditions, but does not exceed 200 ° C.

Thus, a bag filter equipped with a device for heating bins, including a flexible heating tape glued to a metal panel, and a temperature controller, has high reliability and low power consumption for heating bins.

Claims (2)

1. A bag filter comprising a housing with filter sections located therein with dusty gas chambers with a set of vertically oriented filter bags, purified gas chambers, dust collection bins, a filter bag regeneration system, characterized in that each hopper is equipped with a heating device mounted on the wall of the hopper, while the heating temperature does not exceed 200 ° C. 2. The bag filter according to claim 1, characterized in that the heating device of each hopper includes a flexible heating tape glued to a metal panel and a temperature controller.