SU1311763A1 - Apparatus for automatic control of multisectional bag filter - Google Patents

Abstract

The invention relates to a device for the automatic control of a multi-section filter bag, can be used in ferrous and non-ferrous metallurgy and allows to increase the efficiency of regeneration. The device contains a purge fan 2 installed in pipe 1 and covered by a bypass pipe 3, a filter purge gas collector 4 and a purge valve equipped with a pneumatic cylinder 5. The purge valve plate 6 is located inside the collector 4, under which is an intermediate chamber 7, and between them the seat 8. In the manifold 9 of the cleaned gas there is a plate 10 of the valve of the cleaned gas equipped with a pneumatic cylinder 11. The chamber 14 of the cleaned gas of the filter section is separated by filtering sleeves 15 in the body 16 of the filter from the hopper 17 and reservoir 18 to the nozzle 19, the dust-laden gas. The filter control unit 20 is connected to the inlets and outlets with the pneumatic cylinders 5 and 11 through the air distributor 21. On the purge pipe 1, a valve is fixed, rigidly connected to the valve of the bypass pipe 3 and having a drain hole. 3 il. (L / 7 SLE O) from Figure 1

Description

The invention relates to automatic control devices for multisectional bag filters and can be used in gas cleaning devices of ferrous and non-ferrous metallurgy and in other industries.

The purpose of the invention is to increase the efficiency of regeneration and reliability of the filter.

FIG. Figure 1 shows a bag filter with its valve control circuit and a purge fan; in fig. 2 - bypass valve and purge pipe; in fig. 3 - the characteristic of the blower fan.

The device contains a purge pipe. When the bag filter is switched to the regeneration mode from the control unit 20 by the pneumatic cylinder 5, the reverse purge valve opens through the air distributor 21 and purge gas enters the purge manifold 4. The facilitated separation of the plate 6 from the saddle 8 is facilitated by the reduced pressure differential Pg.

Q As the plate 6 moves along the backflow pipe 1, a vacuum is created behind the valve 22, which is equal to its value in the bag filter, which creates a pressure difference on the valve 22. The force created by this pressure difference begins to flow through the 2-blow-through valve 2, turn the valve 22. Passage pipe 3, collector 4 blow-in. Furthermore, the emerging velocity head of the purge gas flow also tends to turn the shutter 22, which is fully opened and the return manifold 4 of the blow-down gas is carried out, under which 2 oduvka sleeves 15. The purge gas ring is intermediate chamber 7, avoyd into the filter housing through the chamber 14

between them - the saddle of the 8. purified gas of the filter section, passes

In the collector 9, the purified gas is located through the sleeves 15 and further into the collector 18

wife plate 10 valve purified gas, dusty gas. However, after a few

equipped with a pneumatic cylinder 11, and natru-seconds after the filter 22 filling gas valve 22 is opened and the purge valve is equipped with a pneumatic cylinder 5. The purge valve plate 6 is located inside

side 12 purified gas. The nozzle 1 of the overnight gas is in the collector 4 of the purge gas. The chamber 14 of the purified gas of the filter section is separated by filtering sleeves 15 in the filter housing 16 from the filter hopper 17 and the collector 18 with the nozzle 19 of dusty gas. The filter control unit 20 30 is connected to the air distributors 21. The valve 22 of the purge pipe 1 is rigidly connected to the valve 23 of the bypass pipeline 3 via the axis 24. The valve 22 has a drain hole 25.

The device works as follows.

The dusty air enters through the nozzle 19 of the dusty gas into the collector 18, is filtered in the sleeves 15, through the intermediate chamber 7 enters the collector 9 of the cleaned gas and is removed from the filter through the nozzle 12. When this plate 10 is lowered down, the plate 6 is pressed against the seat 8, the purge valve is closed. The working point of the hanaet is closed, with the result that the shutters 22 and 23 occupy an intermediate position, respectively, the ratio of the hydraulic resistance of the purge and bypass paths. In this case, the operating point of the characteristics of the blower fan 2 corresponds to the point AB

Thus, the purge is non-stationary (intermittent) in nature and contributes to a better separation of dust from the sleeves than is the case when blowing with a stationary stream. The additional open-close plate 6 of the filter purge valve again creates an unsteady gas purge stream. In addition, the purge fan 2 operates at full capacity only a fraction of the time, most of its time spent working in or at idle mode.

Claims (1)

Invention Formula The characteristics of the purge fan (Fig. 3), in the absence of the flow of purge gas, are in the AZ position, which corresponds to the maximum pressure Pz of the fan 2 of the purge. Under the action of this pressure, the valve 23 rotates and opens the bypass pipeline 3 and, simultaneously, by means of the axis 24 closes the valve 22 with the purge pipeline 1. At the same time, the operating point of the characteristics of the blowing fan moves to the point Ar with the pressure Po corresponding to the hydraulic resistance of the bypass E5 A device for automatic control of a multi-section filter bag, containing a purge fan, interconnected purge and bypass piping with mutually perpendicular sections, a flap installed on the bypass piping, purge valves and purified gas with pneumatic cylinders and a control unit, inlets and the outlets of which are associated with pneumatic cylinders, characterized in that, in order to increase regeneration efficiency and reliability pipe line 3. Along the entire purge filter operation 55, it additionally includes a small pressure pipe 1 and a small pressure balanced by a drainage hole 25. there is a valve installed on the purge pipe and rigidly connected to the valve of the bypass pipe, while When switching the bag filter to the regeneration mode from the control unit 20 by the pneumatic cylinder 5, the backflow valve opens through the air distributor 21 and the purge gas enters the purge manifold 4. The facilitated separation of the plate 6 from the saddle 8 is facilitated by the reduced pressure differential Pg. 50 It closes, as a result of which the shutters 22 and 23 occupy an intermediate position, respectively, the ratio of the hydraulic resistance of the purge and bypass paths. In this case, the operating point of the characteristics of the blower fan 2 corresponds to the point AB Thus, the purge is non-stationary (intermittent) in nature and contributes to a better separation of dust from the sleeves than is the case when blowing with a stationary stream. The additional opening-closing 5 of the filter purge valve plate 6 again creates a non-stationary purge gas flow. In addition, the purge fan 2 operates at full capacity only a fraction of the time, most of its time spent working in or at idle mode. Invention Formula An automatic control device for a multiple-section filter bag, containing a purge fan, interconnected purge and bypass pipelines with mutually perpendicular sections, a damper installed on the bypass pipeline, purge and clean gas valves with pneumatic cylinders and a control unit, inlets and outlets which are associated with pneumatic cylinders, characterized in that, in order to increase regeneration efficiency and reliability filter operation, it additionally contains a valve installed on the purge pipe and rigidly connected to the valve of the bypass pipe, while the valve of the purge line is equipped with a drainage hole and is located in the same plane with the bypass valve. pipeline 25 22 2 Compiled by T. Golenshin Editor N. BobkovTechred I. VeresKorrektor M. Demchik Order 1829/7 Circulation 657 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4