RU189129U1 - DEVICE FOR REGULATING THE HOSE FILTER - Google Patents

Abstract

The utility model relates to filtering devices for gas cleaning from dust and can be used in ferrous, non-ferrous metallurgy, building materials industry and other industries. Technical result achieved: - increasing the degree of gas purification in a bag filter. The solution of this task is achieved in a device for regenerating a bag filter containing a system of pulse regeneration of the sleeves, in the form of a receiver with compressed air, controlled valves and tubes with nozzles at the ends of these tubes, installed coaxially with the hands You, by the fact that the nozzles and tubes are grouped for each row of open ends of the sleeves and connected to the manifolds, controlled valves are made at the entrance to each manifold, the nozzles are installed partially inside the sleeves, while their lower ends are at a distance from the open ends of the sleeves: (0.8-1.2) d where: N is the distance from the lower end of the nozzle to the open end of the sleeve, d is the internal diameter of the sleeve. The internal diameter of the output section of the internal channel of the nozzle at its lower end can be made of: d = (0 , 4-0.6) d, where: d is the diameter of the internal frame Ala nozzle at its lower end, d is the inner diameter of the sleeve. The internal nozzle channel can be cylindrical. The internal nozzle channel can be made tapered with expansion from top to bottom. The internal nozzle channel can be made tapered with narrowing from top to bottom. The internal channel of the nozzle can be made in the form of a Laval nozzle and contain tapering and expanding parts with a cylindrical section between them. The maximum outer diameter of the nozzle can be made from the relation: D = (0.8-0.9) d, where: D is the outer diameter of the nozzle, d- internally ZP minutes diameter rukava.6 f-ly, 13 ill., 3 tab.

Description

The utility model relates to filtering devices for cleaning gas from dust and can be used in ferrous and nonferrous metallurgy, the building materials industry and other industries.

Known filter bag according to the patent of Russian Federation №2324524, IPC B61D 46/02, publ. May 20, 2008

This filter bag for cleaning gas contains a housing with inlet and outlet nozzles, divided into chambers of dirty and clean gas. The design of the filter has sleeves with a filtering surface made of cloth, a system of pulse regeneration of the sleeves, and a system for detecting damage to the filtering surfaces of the sleeves. In this case, the detection system includes an ejector, a dust sensor and nozzles. The sensor is made in the form of a camera with transparent side walls and is located between the light source and the photocell. The filter is characterized in that the clean gas filter chamber is divided into sections that are connected to the discharge pipe of the flue pipes, each section's gas duct is equipped with a shut-off valve, and a system for detecting damage to the filtering surface of the sleeves is installed in each section. The ejector is installed in the flue, and its inlet and inlet connections are brought out of the flue. The ejector inlet is connected to the dust sensor. The sensor outlet is connected to the flue, and the sensor itself is equipped with a regenerating air inlet.

Disadvantage: filter design complexity.

Known filter bag according to US Pat. Of the Russian Federation No. 2191061, IPC B61D 4/02, publ. 10/20/2002

This bag filter includes a housing divided by a partition into chambers for clean and dusty air or gas, an inner lining, filter sleeves on the frames inside the dusty air chamber, mounted on the mounting grid and Venturi block, the number of which is equal to the number of sleeves, conical collection-bottom, nozzles for supplying dusty air to surfaces for cleaning and exhausting purified air, a system for pulse regeneration of hoses with diaphragm valves and a box for compressed purge air, and a device in the control valves. Each sleeve and venturi tubes are equipped with antistatic screens made of ribbon-like metal foil of a given shape. The inner lining of the housing is made in the form of a multi-layer coating with a certain roughness.

Disadvantage: design complexity.

A known system of regeneration of a bag filter according to the patent of the Russian Federation No. 2190271, IPC B01D 46/02, publ. September 27, 2002, prototype.

The essence of this invention: a bag filter includes a housing, a chamber of dusty gas and a removable chamber of purified gas, separated by a bag grid. The dust gas chamber contains an inlet pipe, a dust collecting bin with a dust discharge pipe and a device for tensioning the sleeves. The clean gas chamber includes an outlet and a device for pulse regeneration by blowing with compressed air, containing a receiver, solenoid valves, purge headers and ejecting nozzles. Removable filter sleeves are made of high-temperature, acid-resistant mineral fibrous filter media and are equipped with spacer rings located on the outer surface of the sleeves. The device for tensioning the filter sleeves is made in the form of a horizontal lattice frame with plugs of removable filter sleeves fixed on it, equipped with a vertical bar, the upper end of which has a remote stop. The lower end of the thrust passes through the seal in the bottom of the dust collecting bin and has a quick release coupling with an adjustable spring pusher. The upper end of the link is fastened to the load gripper using a flexible suspension.

The disadvantages of this regeneration system are: low degree of purification and low bag filter life due to the lack of optimization of the nozzles of the pulse regeneration system and their operating modes.

The task of creating a utility model: improving the degree of purification with a significant resource of work.

Technical result: improved gas purification.

The solution of this problem is achieved in a device for regeneration of a bag filter containing a system of pulse regeneration of the sleeves, in the form of a receiver with compressed air, controllable valves and tubes with nozzles at the ends of these tubes, installed coaxially with the sleeves, so that the nozzles and tubes are grouped for each row open ends of the sleeves and connected to the manifolds, controlled valves are made at the entrance to each manifold, the nozzles are installed partially inside the sleeves, while their lower ends are separated from the open ends of the sleeves by the condition:

H = (0.8-1.2) d _p

where: H - the distance from the lower end of the nozzle to the open end of the sleeve,

d _p - the inner diameter of the sleeve.

The inner diameter of the output section of the inner channel of the nozzle at its lower end can be made of the condition:

d _VNS = (0.4-0.6) d _p ,

where: d _VNS - the outer diameter of the nozzle at its lower end,

d _p - the inner diameter of the sleeve.

The inner nozzle channel may be cylindrical.

The internal channel of the nozzle can be made conical with the expansion from top to bottom.

The internal channel of the nozzle can be made conical with a narrowing from top to bottom.

The internal channel of the nozzle can be made in the form of a Laval nozzle and contain tapering and expanding parts with a cylindrical section between them.

The maximum outer diameter of the nozzle can be made as follows:

D _nc = (0.8-0.9) d _p ,

where: D _nc is the outer diameter of the nozzle,

d _p - the inner diameter of the sleeve.

The design of a bag filter for gas cleaning is illustrated by the drawings of FIG. 1-13, which depicts:

- in fig. 1 main section of a bag filter in the section,

- in fig. 2 shows view A, from above,

in FIG. 3 shows a bag filter,

- in fig. 4 shows a section bb of FIG. 3,

- in fig. 5 is a section CC; FIG. 3,

- in fig. 6 is a sectional view of D-D; FIG. 3,

- in fig. 7 shows a pulse cleaning system,

- in fig. 8 is a view of E,

- in fig. 9 shows the first version of the nozzle,

- in fig. 10 shows the second version of the nozzle,

- in fig. 11 shows a third variant of the nozzle,

- in fig. 12 shows the fourth version of the nozzle,

- in fig. 13 shows the layout of the nozzle in the open end of the sleeve.

List of essential features:

building 1,

inlet pipe 2,

discharge pipe 3,

dirty gas chamber 4,

clean gas chamber 5,

sleeve 6,

cavity 7,

adapter 8,

dust collector 9.

support 10,

ladder 11,

fencing 12,

wire frame 13,

filter surface 14,

open end 15,

closed end 16,

tube rack 17,

pulse cleaning system 18.

Receiver 19,

valve 20,

collector 21,

tube 22,

nozzle 23,

channel 24,

tapering part 25,

cylindrical section 26,

widening part 27.

Bag filter (Fig. 1 and 2) for gas cleaning includes a housing 1 with inlet 2 and a discharge pipe 3, the dirty gas chamber 4 and the clean gas chamber 5.

The filter elements are made in the form of sleeves 6 installed vertically in the cavity 7 of the housing 1. The housing 1 may have a cylindrical shape or made in the shape of a rectangular parallelepiped. In the following, the bag filter is described with the second variant of the housing 1. Under the housing 1, an adapter 8 tapers down and then a dust collector 9 is made. The housing 1 is installed on the supports 10 and is equipped from the outside with ladders 11 and fences 12. (Fig. 1 and 2).

The sleeves 6 have a wire frame 13, a filtering surface 14 of fabric, open ends 15 on one side (top), closed ends 16 on the other side (bottom). Sleeves 6 are installed in the tube sheet 17 (Fig. 1 and 7).

In the clean gas chamber 5, a pulse cleaning system 18 is performed. The pulse cleaning system 18 comprises a receiver 19 for compressed air.

The collectors 21 are connected to the receiver 19 by means of valves 20. The number of collectors 21 is made according to the number of rows of sleeves 6 in a particular bag filter. The nozzles 23 are attached to the collectors 21 by tubes 22 mounted on the ends of the tubes 22 against the open ends of the 15 sleeves 6 (FIGS. 1 and 7). The nozzles 23 have channels 24 for supplying compressed air to the sleeves 6 for cleaning them.

The length of the sleeve 6 can be made of the condition:

L ₁ = (10-20) d _p ,

where: L _i - sleeve length 6,

d _p - the inner diameter of the sleeve 6.

The nozzles 23 are installed against each sleeve 6 coaxially with them and against their open ends 15, while the nozzles 23 are installed partially inside the sleeves 6 at a distance from this end:

H = (0.8-1.2) d _p

where: H - the distance from the lower end of the nozzle 23 to the open end of the sleeve 15 6, (depth of installation of the nozzle 23),

d _p - the inner diameter of the sleeve 6.

Justification of the optimality of the specified range of distance H from the condition of a favorable combination of the main characteristics of a bag filter is explained in Table. 1. The main characteristics of the bag filter are the degree of cleaning and the resource of the sleeves 6.

Conclusion: the length of the sleeve 6 can be performed from the condition:

L ₁ = (10-20) d _p ,

where: L ₁ - sleeve length 6,

d _p - the inner diameter of the sleeve 6.

The rationale for the optimality of the internal diameter of the output section of the channel 24 of the nozzle 23 is given in table 2.

Conclusion table. 2: the optimal value of the internal diameter of the output section of the nozzle 23 at its lower end can be determined from the condition:

d _vns = (0.4-0.6) d _p .

The rationale for the optimality of the maximum outer diameter of the nozzle 23 is given in Table. 3

It should be borne in mind that with D _ns / d _p = 1, the ejection of the purified gas into the sleeve 6 does not occur, and with the ratio D _ns / d _{p ≥} 1, the assembly of the device is impossible.

Conclusion table. 3: the maximum outer diameter of the nozzle 23 can be made of the relation:

D _ns = (0.8-0.9) d _p ,

where: D _NS - the outer diameter of the nozzle 23,

d _p - the inner diameter of the sleeve 6.

FIG. 9 shows the first version of the nozzle 23. The channel 24 is cylindrical.

FIG. 10 shows the second variant of the nozzle 23. The channel 24 is made expanding towards the exit.

FIG. 11 shows the third variant of the nozzle 23. The channel 24 is made tapering to the exit. This increases the flow rate of air to sound.

FIG. 12 shows the fourth version of the nozzle 23. Channel 24 is made in the form of a Laval nozzle and contains a tapering part 25, an expanding part 27 and a cylindrical section 26 arranged between them. , which will significantly improve the cleaning of the sleeves 6. In FIG. 13 shows the arrangement of the nozzle 23 inside the bag filter 6.

Device operation

A device for cleaning the bag filter works as follows (Fig. 1, 7 and 8).

The cleaned gas is supplied through the inlet pipe 2 into the chamber of dirty gas 4, which passes through the filtering surfaces 14 of the sleeves 6 into them and through the open ends 15 enters the chamber of clean gas 5 and then into the outlet pipe 3 (Fig. 1).

Every 1-2 minutes, the valves 20 of the pulse cleaning system 18 are opened and compressed air with pressure from 0.4 to 0.8 MPa enters the sleeves 6 through nozzles 23 and open ends 15 inside the sleeves 6.

The dust is shaken off the filtering surfaces 14 and, through the adapter 8, is poured into the dust collector 9 (Fig. 1 and 7).

The use of the utility model allowed:

- to increase the degree of cleaning of the filter elements of the bag filter with a large resource of its work.

Claims (16)

1. Device for regenerating a bag filter containing a system of pulse regeneration of sleeves in the form of a receiver with compressed air, controlled valves and tubes with nozzles at the ends of these tubes, installed coaxially with sleeves, characterized in that the nozzles and tubes are grouped for each row of open ends and connected to the collectors, controlled valves are made at the entrance to each collector, the nozzles are installed partially inside the sleeves, while their lower ends are separated from the open ends of the sleeves at a distance: H = (0.8-1.2) d _p, where: H - the distance from the lower end of the nozzle to the open end of the sleeve, d _p - the inner diameter of the sleeve. 2. A device for the regeneration of a bag filter according to claim. 1, characterized in that the internal diameter of the output section of the internal channel of the nozzle at its lower end is made of the condition: d _GNC = (0.4-0.6) d _p , where: d _VNS - the diameter of the inner channel of the nozzle at its lower end, d _p - the inner diameter of the sleeve. 3. A device for regenerating a bag filter according to claim 1 or 2, characterized in that the inner channel of the nozzle is cylindrical. 4. A device for regeneration of a bag filter according to claim 1 or 2, characterized in that the inner channel of the nozzle is made conical with expansion from top to bottom. 5. A device for regeneration of a bag filter according to claim 1 or 2, characterized in that the inner channel of the nozzle is made conical with a narrowing from top to bottom. 6. A device for regenerating a bag filter in accordance with claim 1 or 2, characterized in that the inner channel of the nozzle is made in the form of a Laval nozzle and contains tapering and expanding parts with a cylindrical section between them. 7. A device for regenerating a bag filter according to claim 1 or 2, characterized in that the maximum outer diameter of the nozzle is made of the relation: D _nc = (0.8-0.9) d _p , where: D _NS - the outer diameter of the nozzle, d _p - the inner diameter of the sleeve.

Images