CN1076209C

CN1076209C - Apparatus for bag filters

Info

Publication number: CN1076209C
Application number: CN97194178A
Authority: CN
Inventors: A·索尔胡斯
Original assignee: Elkem ASA
Current assignee: Elkem ASA
Priority date: 1996-04-29
Filing date: 1997-04-03
Publication date: 2001-12-19
Anticipated expiration: 2017-04-03
Also published as: CN1216936A; ZA973118B; RU2155630C2; NO302018B1; WO1997040916A1; BR9708876A; CZ289149B6; NO961735L; CZ345398A3; NO961735D0

Abstract

The present invention relates to a device for a bag filter for cleaning of gas containing solid particles, the bag filter comprising: at least two chambers (1), each containing a plurality of filter bags (2), a bottom funnel (3, 53) being provided below each chamber (1). The device comprises a distribution device (4, 54) with an inlet (5, 55) for uncleaned gas and a separate opening (6, 56) connected to each bottom hopper (3, 53); -means (13, 57) for closing one opening (6, 56) of the distribution means (4, 54) at a time to shut off the communication of uncleaned gas to this opening and simultaneously open the outlet (8) of the distribution means associated with each bottom hopper (3, 53); a fan (11) for cleaning the filter bags (2) in the chamber (1) which is shut off from the supply of uncleaned gas and at the same time transporting the particles by suction through an outlet (8) in the distribution device (4, 54) to a silo (10) for collecting the particles.

Description

The device that is used for bag hose

Invention field

The present invention relates to a kind of device that is used for bag hose, described bag hose is used for removing solid particle from gas, The present invention be more particularly directed to a kind of device that is used for cleaning the sack of this bag hose and is used for carrying the particle of clearing out of from gas.

Background technology

Here, term " bag hose " is construed as any filter that the gas of wherein waiting to clear out of solid particle passes filter medium.

In this filter, filter medium is normally weaved or nonwoven, but filter medium also can be to be generally filter medium at the bottom of the porous ceramic film material of earthenware form and the sand.When using cloth as filter medium, filter cloth is generally the form of sack, wherein, Qing Jie gas does not pass filter cloth, both clean air was fed to the sack the inside in the future, make gas pass filter cloth and make solid particle stay the inboard of filter cloth thus, can make again not that clean air passes filter cloth from the outside, make solid particle stay the outside of filter bag thus.Hereinafter, the sort of bag hose that is fed to the sack the inside with clean air not is described, but the bag hose of other form defined herein also is suitable for.

Each bag hose all is made up of a plurality of chambeies, and each chamber comprises a plurality of common vertically disposed filter bags.Qing Jie gas is not fed to the inside of sack, and gas passes the material in the sack, and solid particle is trapped in the sack inboard simultaneously.After the work certain hour, must remove the solid particle on the sack.This cleaning is done in such a way that the chamber that will be cleaned and the feeding mechanism of clean air not separate, after this, by with the direction supply clean gas that clean air is not opposite, clean the sack in the chamber of pulling down.This can carry out in many ways.A kind of is so-called " pulse jet " (" puls-jet "), supplies with short and strong pulse from clean gas one side of filter bag, makes the solid particle that is trapped on the sack be eliminated.Another kind of mode is so-called " oppositely air feed ", promptly with the opposite clean gas of direction supply of gas of cleaning not.The fundamental difference of " pulse jet " and " oppositely air feed " is: " oppositely air feed " is based on the cleaning mode that adopts low pressure reduction in a long time, and " pulse jet " is the cleaning mode that adopts short and strong pulse.Also know and to adopt the mode of acoustic vibration and mechanical oscillation to remove delay particle on the filter bag to sack.At last, also can be used in combination above-mentioned clean method.

The particle that is comprised in the chamber of cleaning will be fallen in the closed bottom funnel that is arranged under the chamber, and after this be transported in the storage warehouse by valve etc. by means of pneumatic conveying or such as load modes such as carrier chain or other mechanical mode of movements.

Be used to clean filter bag and carry the known method of the particle of collecting that several shortcomings are arranged to silo from the bottom funnel.At first, all known systems all adopt the autonomous system that is used to clean filter bag and carries the particle of collecting from the bottom funnel to simple storehouse.For the filter bag in the cleaning chamber, each chamber must be equipped with the separate valves that is used to open and close the clean gas of leading to the chamber.In addition, after the sack of clean gas in passing the chamber of just being cleared up, it will comprise a large amount of particles, and for cleaning purpose, clean gas must turn back to bag hose.This can make more dust on the bag hose band.In addition, each bottom funnel all has the device that is used for carrying from funnel particle.And the device that is used for transmitting from the bottom funnel particle is very complicated, and need a lot of maintenance measures with avoid particle towards periphery environment leak.At last, also need to be used to clean filter bag and to carry each independent regulation and the control system of particle, thereby increased the complexity of bag hose from the bottom funnel.

Summary of the invention

The purpose of this invention is to provide a kind of device that is used for bag hose, described bag hose is used to clean the gas that comprises solid particle, and this device combines the cleaning of the filter bag conveying with the particle of collecting.This makes the control of bag hose and bag hose and the design of regulating system simplify greatly.

Therefore, the present invention relates to a kind of device that is used for bag hose, described bag hose is used to clean the gas that comprises solid particle, described bag hose comprises: at least two chambeies, each chamber comprises a plurality of filter bags, the below in each chamber is provided with the bottom funnel, and wherein distributor has and is used for the not import and the separate openings that links to each other with each bottom funnel of clean air; One of them opening that is used for once closing distributor is to turn-off clean air not to the supply of this opening and open the device of distributor outlet simultaneously, and the opening of described distributor links to each other with each bottom funnel; A fan is used for cleaning those and has turn-offed the not filter bag in the chamber of clean air supply, and by swabbing action particle is transported in the silo that collecting granules uses by the outlet in the distributor simultaneously.

According to most preferred embodiment, distributor comprises a chamber with circular cross-section.Preferably taper of the bottom of distributor, and have opening to link to each other with each bottom funnel, described funnel are arranged on the circumference of tapering part of distributor, and export the bottom that is arranged on distributor.

Fan is preferably disposed on after silo filter, the cyclone etc., but also can be arranged between the outlet and silo filter of distributor.

Being used to turn-off not, the device of each open communication of clean air and distributor preferably includes a plate that is arranged on the distributor inboard, described distributor links to each other with the bottom funnel, described plate is arranged on the vertical axes rotationally, and described axle extends to the below, bottom of distributor.This plate has such shape and size, and promptly it turn-offs not being communicated with of clean air and one of them chamber, and simultaneously, its forms one from the bottom funnel in this chamber open channels through the distributor outlet.The axle that links to each other with plate can be by rotations such as motors.Pass through turning cylinder, described plate can move to next opening on the sidewall of distributor from an opening, thereby turn-off being communicated with of not clean air of each chamber and supply, these have turn-offed the chamber that is communicated with the not clean air of being supplied and have opened towards the outlet of distributor simultaneously.Like this, these have turn-offed the chamber that is communicated with the not clean air of being supplied and have removed the particle that is trapped on the filter bag, and fan will be by the clean gas of bag suction, make the particle of delay fall into the bottom funnel of below, chamber, after this, these particles are transported to the silo that is used for storage granules by the outlet of distributor.

Like this, by the present invention, by means of rotating described device, the conveying of the cleaning of filter bag and delay particle all has been subjected to control, and described device is used for turn-offing each opening of the distributor that is communicated with the not clean air of being supplied.

According to another embodiment of the invention, the chamber of bag hose is the mutual contiguous part that is provided with, and distributor is arranged on the central authorities of bag hose, and each bottom funnel directly links to each other with the opening of distributor, with the gas that does not clean to the chamber supply.This set has constituted very compact filter, does not need very big space and be easy to safeguard.In addition, bag hose can be divided into a plurality of chambeies, makes that after a chamber was cleaned, less load was born in remaining chamber.

By the present invention, in the cleaning course of filter bag, avoided the circulation of collecting granules.In this manner, reduced the load of bag hose.In addition, the bottom funnel is less than traditional funnel, because the collecting granules of carrying from the bottom funnel is along with more substantial relatively gas is carried.

By the present invention, can greatly simplify the design of bag hose, be used for having supplied each separate valves of clean gas because no longer need to each chamber.In addition, need because they exchange with simple pipeline connecting device, not be used for the outlet of bottom funnel is linked to each other with distributor from the conveying device of each bottom funnel.

By distributor is combined with this device and in each chamber the bottom funnel outlet link to each other with distributor, in the bag hose that device of the present invention can be used for having existed.

The accompanying drawing summary

Fig. 1 has represented the vertical view of bag hose of the present invention;

Fig. 2 has represented the bag hose vertically cut open along I-I line among Fig. 1;

Fig. 3 has represented to have the vertical view of the bag hose of the present invention of traditional filter screen; With

Fig. 4 has represented the sectional view vertically cut open along II-II line among Fig. 3.

Detailed Description Of The Invention

Fig. 1 and Fig. 2 have represented a bag hose, and it comprises a plurality of chambeies 1, and described each chamber includes a plurality of filter bags 2.Filter chamber 1 is the traditional design form.Each chamber includes a bottom funnel 3, the preferably taper of this funnel 3.

Be provided with between each chamber 1 and be used for distributing not clean air and the distributor 4 that is used to carry collecting granules to chamber 1.At least the bottom of distributor 4 is tapers.The upper end of distributor 4 has an import 5, is used to supply the not gas of cleaning.The tapered lower portion of distributor 4 is provided with opening 6, and they link to each other with bottom funnel 3 in the chamber 1 by pipeline 7.There is outlet 8 lower end of distributor 4, and it links to each other with silo 10 by pipeline 9, and described silo 10 is used for storing the particle of removing from gas.In addition, also be provided with the fan 11 that links to each other with pipeline 9.The provided upstream of fan 11 is equipped with silo filter or a cyclone 12.Except import 5 being arranged on the upper end of distributor and will exporting 8 lower ends that are arranged on distributor, import 5 also can be arranged on the lower end of distributor, and exports 8 upper ends that can be arranged on distributor.

In distributor 4, also be provided with closing and device for opening 13 of a rotation, it is used for once closing an opening 6 to turn-off by the not clean air of this opening to chamber 1 supply.This device 13 comprises that one is used for once closing an opening 6 and supplies the not plate 14 of clean air by this opening to chamber 1 to turn-off.This plate 14 can rotate around axle 15 by a motor etc. 16.Plate 14 is designed to like this, promptly enters when making plate 14 close one of them outlet position of 6 when device 13, and this outlet 6 will be connected with the outlet 8 of distributor 4 bottoms.

The described device of the application of the invention, device 13 can be in such position, i.e. and the import 5 of distributor 4 communicates with other all openings 6 except that an opening.Therefore, the gas that does not clean will be supplied to other all chambeies 1 except that a chamber.Thereby make not clean air inflow chamber 1 and pass filter bag 2.The solid particle that comprises in the gas will be trapped in the inboard of filter bag.In the time will removing the delay particle in one of them chamber 1, device 13 rotates to a position, that is: plate 14 is closed be used for to the not opening 6 of the gas of cleaning of chamber 1 supply that is cleaned.Fan 11 in the pipeline 9 will form low pressure in chamber 1, described pipeline 9 links to each other with the outlet at bottom 8 of the distributor that has silo 10, and described chamber 1 is closed and can not be supplied to not clean air.The pressure of this reduction will make the particle that is detained on the filter bag surface fall into bottom funnel 3, and particle will be transported to silo rapidly.After having cleaned filter bag and having carried particle, device 13 rotates to and makes clean air not be supplied to the position in the chamber 1 that has been cleaned once more, simultaneously, the opening 6 in next chamber 1 is closed and can not be supplied to not clean air, and this opening 6 is opened and is used to clean filter bag and carries particle.This process repeats with predetermined interval.

Fig. 3 and Fig. 4 have represented the second embodiment of the present invention.

Fig. 3 and Fig. 4 have represented the bag hose of rectangle.This bag hose is divided into a plurality of chambeies 50.Be provided with conical hopper 51 below chamber 50, by means of the partition wall 52 of inside, this funnel 51 is divided into the used bottom funnel 53 in each chamber 50.Bottom center at conical hopper 51 is provided with and top identic distributor 54 illustrated in figures 1 and 2.The top of this distributor 54 has one and is used for the not gas feed 55 of clean air, and the tapered lower portion of distributor 54 has the opening 56 that funnel 53 directly communicates bottom each respectively.In the inside of distributor 54, be provided with one and close rotationally and device for opening 57, be used for closing continuously and opening each and supply the not opening 56 of clean air to chamber 1.Device 57 has and the identical form of device 13 among the embodiment illustrated in figures 1 and 2.Distributor 54 is to work with Fig. 1 and the described identic mode of Fig. 2.

Claims

1. An arrangement for a bag filter for cleaning gases containing solid particles, said bag filter comprising: at least two chambers (1) each containing a plurality of filter bags (2), Below each cavity (1) is provided a bottom funnel (3, 53), characterized in that the distribution device (4, 54) has an inlet (5, 55) for the uncleaned gas and is connected to each bottom funnel (3 , 53) connected independent openings (6, 56); one for closing one of the openings (6, 56) of the distribution device (4, 54) at a time to shut off the supply of uncleaned gas to the opening and open the distribution device at the same time means (13, 57) of outlets (8), said distribution means associated with each bottom funnel (3, 53); a fan (11) for cleaning those chambers (1) whose supply of uncleaned gas is shut off The filter bag (2) in the filter, and at the same time the particles are conveyed by means of suction through the outlet (8) in the distribution device (4, 54) to the silo (10) for collecting the particles.

2. Device according to claim 1, characterized in that the dispensing means (4, 54) comprise a chamber with a circular cross-section.

3. The device according to claim 2, characterized in that the lower part of the dispensing device (4, 54) is conical and has an opening (6, 56) connected to each bottom funnel (3, 53), so Said funnel is arranged on the circumference of the conical part of the distribution device (4, 54).

4. The device according to claim 1, characterized in that the means (13, 57) for shutting off the communication of the unclean gas with the respective openings (6, 56) of the distribution means (4, 54) comprise a A plate (14) inside the dispensing device (4, 54) connected to the bottom funnel (3, 53), said plate (14) being rotatably arranged on a vertical shaft (15), said shaft Extending below the bottom of the distribution device (4, 54), said plate (14) has such a shape and size that it shuts off the communication of the uncleaned gas with one of the chambers (1), and at the same time it forms a The bottom funnel (3, 53) of the chamber (1) passes through the open channel of the outlet (8) of the dispensing device.