RU2437711C1 - Bag filter for three-stage air cleaning of impurities - Google Patents

Abstract

FIELD: process engineering. ^ SUBSTANCE: invention relates to aspiration air filtration. Proposed filter comprises two dust collecting chambers with filter sleeves, contaminated air feed pipelines, inlet chamber with twin deflecting screen, cleaned and additionally cleaned air chambers, one-row panel of air cell-type filters to form chambers of additional dust separation below said panel and chambers of additionally cleaned air above said panel, mechanisms of recovery, filter sleeve recovery control mechanisms and said panel of air cell-type filters, bins, manifolds of additionally cleaned air discharge, inspection chambers, air ducts, and radial-flow blowers. Additional dust separation chamber is divided by dead partition separating the panel of air cell-type filters into two sections to form second chamber of additional dust separation. ^ EFFECT: lower operating costs and higher efficiency. ^ 2 cl, 10 dwg

Description

-образной неподвижно закрепленной направляющей. Кроме того, боковые скаты двускатного отклоняющего экрана входной камеры герметичного соединены с внутренними боковыми стенками бункеров, инспекционная камера установлена с охватом вертикальной стенки Т-образной перегородки и снабжена входной инспекционной дверью и отверстием в горизонтальной платформе для ввода очищенного воздуха, коллектор вывода загрязненного продувочного воздуха соединен воздуховодом со всасывающим патрубком центробежного продувочного вентилятора панели воздушных ячейковых фильтров, нагнетательный патрубок которого соединен с входной камерой фильтра. При этом механизм управления регенерацией панели воздушных ячейковых фильтров снабжен управляемыми воздушными заслонками, установленными в воздуховодах на входе и выходе второй камеры дополнительного пылеулавливания, а также на выходе из камеры дополнительно очищенного воздуха, и обеспечивающими совместно с центробежным продувочным вентилятором режим регенерации панели воздушных ячейковых фильтров путем обратной посекционной продувки панели дополнительно очищенным воздухом и возврат загрязненного продувочного воздуха во входную камеру фильтра, по ее центру, по отдельно выделенной линии трубопроводов.The invention is intended for the purification of aspiration air taken from woodworking grinding machines containing 100% wood grinding dust with abrasive particles, which is fire and explosion hazard, and the return of purified air to the production room. The filter includes two dust-collecting chambers installed with an interval between their lateral sides with frame filter sleeves vertically located in them, fixed with upper open ends on perforated plates, a polluted air supply pipe, an inlet chamber with a gable deflecting screen, a cleaned chamber and an additional purified air chamber, separated between themselves a T-shaped partition having a horizontal platform and a vertical wall lowered down, on one side from which horizontally installed a single-row panel of air filter cells of the type ФЯК, equipped with internal frames with the formation of an additional dust collection chamber from the bottom of the camera panel and placement of additional cleaned air on the camera panel, main and additional centrifugal fans, a recirculation duct, mechanisms for regenerating and controlling the regeneration of filter bags and an air panel cell filters, hopper with unloading device and airlock, output collector tively purified air. The filter is equipped with an additional supply pipe for contaminated air, an additional hopper with a discharge device and a lock gate, a centrifugal purge fan for the air cell filter panel, a collector for the output of contaminated purge air and an inspection chamber, the filter bag regeneration mechanism is equipped with an additional centrifugal fan, the additional dust collection chamber is divided by a blank transverse dust separation separating the panel of air cell filters n and two sections with the formation of a second chamber for additional dust collection, having individual openings for the entrance of cleaned and output of contaminated purge air, the chamber of additionally purified air is equipped with an inspection corridor, an inspection door and an additional hole for outputting additionally purified air, openings for the entrance of purified air into the chambers of additional dust collectors are placed in a vertical wall and in a horizontal platform of a T-shaped partition, and to remove contaminated about the purge air in the bottom of the chambers of additional dust collection, the hole for the entrance of cleaned air located in the horizontal platform of the T-shaped partition is connected by an air duct to the inlet of the second chamber of the additional dust collection, the collector of the output of contaminated purge air is equipped with branches-ducts that are connected to the holes for output contaminated purge air from additional dust collection chambers, the cleaned air chamber is installed with perforation coverage these plates of dust collection chambers and the formation of an inspection corridor in it, which houses the mechanisms of regeneration and regeneration control of filter bags, made in the form of a regeneration trolley with two additional centrifugal fans installed on it, equipped with purge deflectors with side wings and an output motor with an asterisk on the output shaft, which is in the “rack gear” with a duplex chain, serving as a “gear rack”, laid with tension in

-shaped motionless fixed guide. In addition, the lateral slopes of the gable deflecting screen of the airtight inlet chamber are connected to the inner side walls of the bunkers, the inspection chamber is installed with the vertical wall of the T-shaped partition and is equipped with the inspection door and an opening in the horizontal platform for the introduction of purified air, the collector for the discharge of contaminated purge air is connected air duct with a suction pipe of a centrifugal purge fan of a panel of air cell filters, discharge pipe which is connected to the input filter chamber. At the same time, the regeneration control panel of the cell air filter panel is equipped with controlled air dampers installed in the air ducts at the inlet and outlet of the second additional dust collection chamber, as well as at the outlet of the additional purified air chamber, and together with the centrifugal blower fan, provides the air cell filter panel regeneration mode by reverse sectional purge of the panel with additionally purified air and return of polluted purge air to the inlet th filter chamber, at its center, on a separate dedicated piping line.

The technical result is a reduction in operating costs and the cost of manufacturing a filter and the expansion of its functionality.

The invention is intended for the purification of gas and (or) air in industrial premises, the equipment of which pollutes the air, in particular for the purification of aspiration air taken from woodworking grinding machines, containing 100% wood grinding dust with solid abrasive particles, which is fire and explosive , and return of purified air to the production room.

The essence of the proposed decision

-образной направляющей, которая закреплена на поддерживающей опоре, установленной на горизонтальной платформе инспекционного коридора камеры очищенного воздуха по его центру, с образованием «реечного зацепления» приводной звездочки мотор-редуктора с дуплекс-цепью, а также скользящим рельсовым устройством с ходовыми тележками для поддержания электрокабеля, установленным на балках потолочного перекрытия камеры очищенного воздуха и над инспекционным коридором, дополнительные центробежные вентиляторы механизма регенерации фильтровальных рукавов установлены на регенерационной тележке с расположением корпусов вентиляторов по схеме ПР 90° и Л 90° и присоединением к их нагнетательным патрубкам продувочных дефлекторов с внутренними направляющими лопатками и боковыми крыльями, которые выполнены с обеспечением перекрытия ими трех рядов фильтровальных рукавов обеих пылеулавливающих камер с продувкой среднего ряда фильтровальных рукавов, и консольно закреплены на регенерационной тележке с образованием транспортного зазора между дефлекторами и открытыми концами фильтровальных рукавов, при этом инспекционная камера установлена под горизонтальной платформой с охватом вертикальной стенки Т-образной перегородки и снабжена входной инспекционной дверью и отверстием для ввода очищенного воздуха, размещенным в горизонтальной платформе. Кроме того, регенерационная тележка выполнена в виде рамы, которая снабжена четырьмя горизонтальными и четырьмя вертикальными полуосями с установленными на них ходовыми и центрирующими шарикоподшипниковыми роликами, первые из которых размещены в ходовых [-образных рельсах, закрепленных на боковых стенках инспекционного коридора камеры очищенного воздуха, а вторые установлены на регенерационной тележке с образованием регулируемого транспортного зазора между центрирующими роликами и боковыми стенками инспекционного коридора камеры очищенного воздуха.To obtain a higher technical result compared with the known solutions, namely, to reduce operating costs, the cost of manufacturing the filter and expand its functionality, the bag filter is equipped with an additional supply pipe of polluted air, an additional hopper with an unloading device and a lock gate, and a collector for the output of polluted purge air and inspection chamber, the filter bag regeneration mechanism is equipped with an additional centrifugal m fan, the additional dust collection chamber is divided by a blank transverse partition separating the panel of air cell filters into two sections with the formation of a second additional dust collection chamber having individual openings for the entrance of purified air and the output of polluted purge air, the additional purified air chamber is equipped with an inspection corridor, an additional hole for the output of additionally purified air and an inspection door, which is placed in a vertical In the case of the T-shaped partition, the openings for the entrance of purified air into the additional dust collection chambers are located in the vertical wall and in the horizontal platform of the T-shaped partition, and for the output of contaminated purge air in the bottom of the additional dust collection chambers, the collector for the output of additional purified air is equipped with branch-ducts, which are connected to the openings for the output of additionally purified air placed in the bottom of the inspection corridor of the chamber of additionally purified air , the hole for entering the cleaned air, located in the horizontal platform of the T-shaped partition, is connected by an air duct to the inlet of the second additional dust collection chamber, the collector of the output of polluted purge air is provided with branches-air ducts that are connected to the holes for outputting the polluted purge air from the additional dust collection chambers, the regeneration mechanism of the panel of air cell filters is equipped with an individual centrifugal purge fan, suction the inlet pipe of which is connected to the collector for the output of contaminated purge air, and its discharge pipe is connected by an air duct to the inlet chamber for introducing contaminated air into the filter, in its center, the regeneration control panel of the air cell filter panel is equipped with controllable air dampers installed in the inlet and outlet ducts the second chamber of additional dust collection, as well as at the outlet of the chamber of additionally purified air, and additionally providing together with ind by an individual centrifugal purge fan, the mode of regeneration of the panel of air cell filters by sectionally purging the panel section by additionally purified air and returning the polluted purging air to the filter inlet along a separate pipe line, each of the dust collecting chambers with filter bags is installed on an individual hopper, the cleaned air chamber is installed with coverage of the perforated plates of the dust collecting chambers and above the open ends of the filter p bays, with the horizontal platform of the T-shaped partition being placed below the perforated plates of the dust collecting chambers, and the formation of an inspection corridor in the cleaned air chamber located between the dust collecting chambers along their entire length and above the inlet chamber for the input of polluted air, the side slopes of the gable deflecting screen of the filter inlet chamber hermetically connected to the inner side walls of the bins and the formation of an inspection corridor under the gable deflecting screen, the control mechanism regeneration of filter bags is equipped with a regeneration trolley located in the inspection corridor of the cleaned air chamber with a gear motor mounted on it and a drive sprocket on its output shaft, a duplex chain serving as a “gear rack”, laid with tension in

-shaped rail, which is mounted on a supporting support mounted on a horizontal platform of the inspection corridor of the cleaned air chamber in its center, with the formation of a “rack mesh” of the drive sprocket of the geared motor with a duplex chain, as well as a sliding rail device with running trolleys to maintain the electric cable installed on the beams of the ceiling of the purified air chamber and above the inspection corridor, additional centrifugal fans of the filter regeneration mechanism of flax sleeves are mounted on a regeneration trolley with the arrangement of fan housings according to the PR 90 ° and Л 90 ° scheme and attachment to their discharge nozzles of purge deflectors with internal guide vanes and side wings, which are made to ensure that they overlap three rows of filter bags of both dust collecting chambers with a purge the middle row of filter bags, and cantilever mounted on the regeneration trolley with the formation of a transport gap between the deflectors and the open ends of the filter rovalnyh sleeves, the inspection camera is mounted under a horizontal platform with a vertical wall covering a T-shaped partitions and is provided with an input opening and an inspection door for input of the purified air, placed on the horizontal platform. In addition, the regeneration trolley is made in the form of a frame, which is equipped with four horizontal and four vertical semi-axes with running and centering ball-bearing rollers mounted on them, the first of which are placed in running [-shaped rails mounted on the side walls of the inspection corridor of the cleaned air chamber, and the second mounted on a regeneration trolley with the formation of an adjustable transport gap between the centering rollers and the side walls of the inspection corridor of the chamber purified air.

The claimed solution relates to the field of purification of air or gas, as well as mixtures thereof from mechanical impurities, in particular to the purification of suction air taken from woodworking grinding machines containing 100% wood grinding dust, which is fire and explosion hazard, and the return of cleaned air to the production room.

The claimed solution can be used in the milling, textile, chemical and other industries in which the suction air of the production contains 100% fire and explosive dust such as wood grinding.

From the sources of scientific, technical and patent information, a large number of modifications of bag filters are known. Among them, those filters in which the filter frame sleeves are fixed with their upper open ends on perforated plates and the filter cloth is regenerated in the sleeves by back-flushing with purified air are selected as analogues and a prototype, which makes it possible to further improve them in the direction indicated in the claims the claimed decision.

The known system of three-stage purification of suction air of the Danish company "JHM-Moldow", described in the training manual V.E. Voskresensky "Systems of pneumatic conveying, dust collection and ventilation in woodworking enterprises. Theory and practice". In two volumes. Volume 2. Part 1. Dust collection systems. Polytechnic, 2009 .-- 299 p. The specified three-stage air purification system consists of a bag filter having two air purification stages, made in the form of an inlet chamber and filter bags, and a third air purification stage, made in the form of a fabric air diffuser (a large sleeve sewn from a filter cloth like СМ-360), located in the production room. The bag filter contains a dust collecting chamber with frame filter bags vertically located in it, fixed with its upper open ends on perforated plates, a contaminated air supply pipe, an inlet for polluted air inlet, a cleaned air chamber mounted above the filter bags, at least one main centrifugal fan , a clean air outlet duct connected at one end to a cleaned air chamber, and at the other end to suction m nozzle of the main centrifugal fan, a recirculation duct connected to the discharge nozzle of the main centrifugal fan, a hopper installed under the filter bags and having a discharge device with a lock gate.

In addition, the filter contains mechanisms for regeneration and regeneration control of filter bags, made in the form of a drive regeneration trolley with an axial purge fan mounted on it, equipped with a deflector for distributing purge air through the filter sleeves, and placed inside the regeneration trolley, which has four rollers located in two profile guide rails mounted along the edges of the purified air chamber and four bumper rollers centering the regeneration bodies hedgehog in the lateral direction relative to the profile guide rails. In this case, the regeneration trolley has a drive located in the form of a gear motor with a through output shaft installed in the bearing bearings of the trolley and sprockets fixed to its consoles, each of which is meshed with an individual duplex circuit serving as a “gear rack”, and pre-tensioned trolley located in the groove of the profile guide rail of the track rollers. In addition, the regeneration trolley is equipped with a sliding rail device with running trolleys for the electric cable, mounted on the beams of the shelf floor of the cleaned air chamber above the filter bags.

The above three-stage air purification system from wood grinding dust has the following disadvantages.

1. The fabric air distributor installed in the white grinding workshop (explosion hazard category B), in order to ensure explosion-fire and sanitary-hygienic safety in the workshop, must be frequently replaced with a clean air distributor with the subsequent restoration of the dusty fabric air distributor to a working state, which causes high operating costs due to the following.

Explosion and fire hazard in the workshop arises from the fact that the fabric air diffuser does not have a mechanism for regenerating filter cloth and a device for periodically removing dust, which leads to the accumulation of explosive wood dust in it.

Violation of sanitary and hygienic working conditions in the workshop occurs due to the penetration of moisture and heat released from the workshop workers and from the process equipment into the tissue air diffuser, and the formation of pathogenic bacteria in the dust layer during its prolonged presence in the tissue air diffuser, which, together with recirculated air, enter inside the workshop. After dismantling, the dusty fabric air distributor is turned outward with a dust layer, the fabric is blown with an air stream, then it is washed in a soapy solution with the addition of disinfecting components and dried. After that, the air diffuser is turned out, returning it to its original state.

2. There is no inspection corridor in the filter cleaned air chamber for mounting and dismounting the filter bags, as well as for servicing the purge fan and the cart drive mounted on the regeneration cart, and the sliding rail device with carts for the electric cable, which increases operating costs.

3. A sliding rail device with trolleys for an electric cable due to the absence of an inspection corridor in the cleaned air chamber is fixed above the fabric filter bags. In the event of a breakdown of the electric cable, which is possible as a result of repeated bending of the cable during movement of the regeneration trolley, a sheaf of sparks resulting from breakdown will fall into the sleeves and cause a fire in the filter, which will lead to the subsequent replacement of part of the filter sleeves and will result in additional costs for the purchase of sleeves and additional operational the cost of dismantling the burnt sleeves and installing new sleeves in the filter.

4. Due to the absence of an inspection corridor in the cleaned air chamber and the location of profile guide rails for the rollers of the regeneration carriage along the edges of the cleaned air chamber, the regeneration carriage has a running and bumper roller base with an increased width (B = 2400 mm) and a shortened length (L = 600 mm ) Such running and centering roller bases do not provide, in the presence of two duplex chains, the reliable movement of the cart without distortions and jamming, which cause additional operating costs for their elimination.

5. An axial purge fan having a square casing and a lower airflow outlet into the deflector located inside the regeneration trolley does not provide uniform blowing of 12 filter bags located in one row with a length of 2.4 m, which reduces the service life of poorly blown bags . The uneven service life of the filter bags causes increased operating costs for the detection of failed bags.

6. The presence of two sprockets and two duplex chains in the drive of the regeneration trolley, which serve as "gear racks", requires ultra-precise (precision) manufacture of these chains and their tension, which ensure simultaneous engagement of the teeth of the sprockets with the links of duplex chains when reversing the drive motor of the regeneration trolley, which increases the cost of the drive regeneration carts and operating costs for the exhibition and fixing of duplex chains. Incorrect fastening of duplex chains, which does not provide simultaneous engagement of the teeth of the sprockets with links of duplex chains, will lead to skewing and jamming of the regeneration carriage, which will cause additional operating costs for their elimination.

7. The filter has a high height (H _f = 7.5 m), which does not allow it to be installed on the roof of the building. The height of the filter is formed from the following heights: the height of the cleaned air chamber h _kov = 1.5 m, the height of the filter bags h _fp = 2.7 m, the height of the hopper h _b = 1.7 m, the height of the lock gate h _slz.z = 0, 6 m, the height of a closed chain conveyor with an inlet loading pipe h _c.k. = 1.0 m. Total H _f = 7.5 m.

The closest in technical essence and the achieved result is "Filter bag for three-stage air purification from mechanical impurities" patent No. 2336930 C2 with priority dated September 12, 2006, IPC B01D 46/02, which contains at least one row of filtering modules, each of which has two dust-collecting chambers installed with an interval between their side walls, equipped with tube sheets in the upper part with through pipes and sections of vertically arranged filter bags fixed to the upper open ends on the pipes of the tube sheets, a manifold of variable cross-section for introducing contaminated air located in the gap between the dust collecting chambers, a purge air outlet manifold, a purge air manifold provided with an inlet shut-off valve, a main centrifugal fan mounted at the front end of each row of modules, and recirculation duct, valve boxes mounted on tube sheets with poppet type actuating valves located in them, interacting Along with two coaxial openings for purge and purified air located on the horizontal axis of the purge air manifold one above the other in each valve box, and two mirror-mounted valve boxes of one module have a common partition separating pairs of their coaxial openings, a sealed service chamber mounted on valve boxes, a hopper made of three parts, the upper of which is square, and the lower is cylindrical in shape, holes are provided in the upper part of the hopper for entering contaminated air, equipped with guiding shields and rotary dampers installed vertically on the central partition separating the hopper, a louvred grille is inclined under each dust collecting chamber, and the lower cylindrical part of the hopper is made in the form of an annular groove with an opening for unloading mechanical impurities into the sluice unloader with the location of the gateway unloaders in adjacent rows of modules in a staggered manner, above the trench along the axis of the cylindrical part, a drive e conical-cylindrical unloading device with blades mounted radially on the outer surface of the cylindrical part and lowered into the groove, in addition, the filter contains at least one single-row panel of air cell filters, and the purge air manifold is equipped with an additional centrifugal fan, discharge pipe which is connected to the inlet of the purge manifold. The known filter differs in that the panel of air cell filters is installed horizontally in the gap between the dust collection chambers under the valve openings for purified air to form an upper chamber of purified air, which is connected to the suction pipe of an additional centrifugal fan, and a lower chamber of additional purified air, made with one open end, to which a manifold of cleaned air outlet is attached, protruding beyond a number of modules and having two vertical side walls with rectangular windows, into which honeycomb lattices are built, made of flat and corrugated ribbons of heat-resistant material, having a total living area of corrugations, which prevents the passage of fire through them at an installed capacity of the main centrifugal fan, in addition to a cleaned output collector air at the outlet of the panels of fire barriers are connected to the receiving manifolds of variable cross section, the outlet openings of which are connected to the pipe collecting s Tee connected at the output with the main suction pipe of the centrifugal fan.

Despite the large number of coinciding features of the prototype and the proposed solution, the absence of the distinctive features of the latter in the prototype does not provide a technical result, which consists in reducing operating costs and the cost of manufacturing the filter and expanding its functionality for the following reasons.

1. The complex and expensive mechanism for controlling the regeneration of hose sections is characterized by insufficient reliability and can cause subsequent repairs.

2. Special processing of compressed air supplied to the valve control pneumatic cylinders is required, requiring a compressed air purification station.

3. In the cold season, air heating is required in a sealed filter maintenance chamber, in which the valve control pneumatic cylinders are located.

4. The mechanism for controlling the regeneration of filter bags by reverse sectional purging is characterized by high material consumption and high labor costs for manufacturing, which increases the cost of manufacturing the filter.

5. The additionally purified air chamber does not have an inspection corridor for mounting and servicing the panel of air cell filters, which increases operating costs.

6. Installation of additional dust collection at the inlet and outlet of the chamber, as well as at the exit of the second chamber, of additional purified air and in the transverse partition between the inspection hatches chambers with nozzles to which the controlled air dampers are connected, increases the cost of manufacturing a filter due to the additional cost of inspection hatches.

7. The filter due to the presence of a complex mechanism for controlling the regeneration of the hose sections does not ensure the stability of obtaining high efficiency air purification E,%.

8. The filter has a high height of 12 m, which does not allow it to be installed on the roof of the building located above the production room.

The complexity of the control mechanism for the regeneration of the hose sections is caused by the fact that the valves designed to sequentially open the holes in the purge manifold at regular intervals and supply purified air through them to the hose sections are controlled by pneumatic cylinders, and compressed air is supplied to the lower and upper cavities of the pneumatic cylinders consecutive time delays. For a number of modules of the prototype, consisting, for example, of eight hose sections, the regeneration control scheme of the hose sections includes 8 pneumatic cylinders, 8 electromagnetic air diffusers and a PURF device (filter regeneration control device).

Such a valve control mechanism has a high cost and low reliability.

The need for a compressed air purification station is dictated by the fact that to supply compressed air to the valve control pneumatic cylinders, it must be cleaned at least grade 10 according to GOST 17433-80 and saturated with sprayed oil (2-4 drops per 1 m ³ ) with a viscosity of 10- 35 mm ² / s at a temperature of 50 ° C.

The need for heating the air in a sealed service chamber in which the pneumatic cylinders are located is dictated by the requirements for creating normal working conditions for pneumatic cylinders to ensure their operability in the cold season.

The large consumption of materials and the cost of manufacturing a mechanism for controlling the regeneration of filter bags by reverse sectional purging are due to the following. For the manufacture of the mechanism requires: a purge manifold and valve boxes with holes for purge and purified air, having seats for pneumatic cylinder valves, inspection hatches with seals in each valve box by the number of sections of filter bags, as well as pneumatic cylinders with self-adjusting valves and electromagnetic air distributors, PURF device to control the electromagnets of the air diffusers of the filter.

The lack of stability in obtaining high efficiency air purification E,%, is due to three reasons that limit the functionality of the bag filter.

1. The mechanism for controlling the regeneration of filter bags contains a group of pneumatic cylinders that have valves on their rods that alternately overlap the holes for supplying purge air to the regenerated section of the bags and holes for the outlet of purified air, located one above the other.

Pneumatic cylinders are controlled by electromagnetic air distributors. In the event of failure of any of the electromagnets, the direction of air supply to the pneumatic cylinder planned according to the cyclogram will not occur, which will not open the holes for supplying purge air to the regenerated section of the hoses. As a result, after several regeneration cycles, dust will clog the filter sleeves of the section disconnected from the regeneration, and the air permeability of the sleeve fabric sharply decreases, i.e. the so-called “collapse” will occur, and all air with dust in the cleaning mode will be filtered through the sleeves of the remaining sections. In this case, the air and dust load on the sleeves of these sections will increase, which will lead to a decrease in the efficiency of air purification E,%. The restoration of the previous high efficiency of air purification is possible only after the replacement of a failed electromagnet in the air distributor.

2. The regeneration of the panel of air cell filters is performed by reverse purging the filters with purified air with a dust concentration of C _k = 1.5 mg / m ³ at C _n = 3000 mg / m ³ and C _k = 3.0 mg / m ³ at C _n = 6000 mg / m ³ , which leads to the deposition of dust in the purified air on the inner surface of the filters of the PFC. When the filtration mode is activated, the dust deposited during regeneration on the inner surface of the FFK filters gets into the recirculation duct and then into the workshop, which will reduce the efficiency of air purification in the filter E,%.

The high height of the prototype filter, equal to 11 m, is due to the fact that the filter contains chambers, valve boxes and mechanisms mounted on top of each other:

- a service chamber with a height h _obsl = 2 m, through which the frame filter bags are installed in the dust collecting chambers;

- valve boxes with poppet valves h _on = 0.5 m;

- a chamber of purified air h _{about in} = 1 m;

- camera additionally purified air h _{d about in} = 2.0 m;

- additional dust collection chamber h _{d p y} = 1.0 m;

- a hopper with a discharge device having a height h _b = 2.9 m;

- lock gate h _w = 0.6 m;

- a closed chain conveyor with a loading pipe h _{c k} = 1.0 m.

Total Σ _h = 11 m.

The inability to install a bag filter on the roof of the building causes the following disadvantages:

1. A filter with equipment for the centralized collection of mechanical impurities (storage hopper) occupy an additional area of the factory territory and spoil its landscape design.

2. The presence of a storage hopper with a screw-spring device for unloading mechanical impurities (N = 5.5 kW) causes increased operating costs.

3. The presence of a contaminated air supply pipe and a recirculation duct placed on an open industrial site causes increased investment values in the project due to the additional cost of pipelines and their coating with insulating material.

The task to which the claimed solution is directed was to further improve the known design of a bag filter with three-stage air purification from mechanical impurities, which include 100% wood grinding dust, and obtain a technical result - reducing operating costs and manufacturing costs of the filter and expansion of its functionality.

The achievement of the above technical results is ensured by the fact that the bag filter for three-stage air purification from mechanical impurities, containing two dust collecting chambers with a gap between their sides and vertical filtering sleeves, fixed with their upper open ends on perforated plates installed in the upper part dust collecting chambers, inlet pipe for polluted air, inlet chamber for inputting contaminated air an ear equipped with a deflecting gable screen, a cleaned chamber and an additionally cleaned air chamber separated by a T-shaped septum having a horizontal platform and a vertical wall lowered downward, at least one row panel of frame air filter cells of the type ФЯК is horizontally installed on one side of it equipped with internal frames with the formation of the bottom of the camera panel additional dust collection and the placement on top of the camera panel of additional purified air, p at least one main centrifugal fan and a recirculation duct, a hopper installed under the filter bags and having a discharge device and a lock gate, an additional cleaned air outlet manifold connected at the outlet to the suction pipe of the main centrifugal fan, the discharge pipe of which is connected to the recirculation duct, mechanism filter bag regeneration, containing an additional centrifugal fan, air panel regeneration mechanism a cell filter containing a centrifugal fan operating in the suction mode, a filter bag regeneration control mechanism, a cell filter panel regeneration control mechanism, including controllable air dampers installed in the inlet pipe of the polluted air at the filter inlet, and also at the inlet and outlet of the chamber additional dust collection, at the outlet of the chamber of additionally purified air, characterized in that the bag filter is equipped with an additional supply polluted air piping, an additional hopper with a discharge device and a lock gate, a polluted purge air outlet manifold and an inspection chamber, the filter bag regeneration mechanism is equipped with an additional centrifugal fan, the additional dust collection chamber is divided by a blank transverse partition dividing the panel of cell air filters into two sections with the formation of a second additional dust collection chamber having individual openings for entering about of cleaned air and the discharge of polluted purge air, the chamber of the additionally purified air is equipped with an inspection corridor, an additional hole for the output of additionally purified air and an inspection door, which is located in the vertical wall of the T-shaped partition, openings for the entrance of purified air into the additional dust collection chambers are located in the vertical wall and in the horizontal platform of the T-shaped partition, and to remove contaminated purge air in the bottom of the chambers dust collector, the collector for the output of additionally purified air is provided with branch ducts that are connected to the holes for the output of additionally cleaned air located in the bottom of the inspection corridor of the additionally purified air chamber, the hole for the inlet of purified air located in the horizontal platform of the T-shaped partition is connected by an air duct with the inlet of the second chamber for additional dust collection, the collector for the output of contaminated purge air is provided with a branch air ducts that are connected to the openings for discharging contaminated purge air from the additional dust collection chambers, the regeneration mechanism of the air cell filter panel is equipped with an individual centrifugal purge fan, the suction pipe of which is connected to the collector of the output of contaminated purge air, and its discharge pipe is connected by an air duct to the inlet chamber for entering polluted air, in its center, a control mechanism for the regeneration of the panel of air cells x filters are equipped with controlled air dampers installed in the ducts at the inlet and outlet of the second chamber for additional dust collection, as well as at the outlet of the chamber of additionally purified air, and additionally providing, together with an individual centrifugal purge fan, a regeneration mode of the panel of cell air filters by means of reverse sectional sectional purging of the panel purified air and return of polluted purge air to the inlet chamber of the filter separately of the piping line, each of the dust collecting chambers with filter bags is mounted on an individual hopper, the cleaned air chamber is installed covering the perforated plates of the dust collecting chambers and above the open ends of the filter bags with the horizontal platform of the T-shaped partition below the perforated plates of the dust collecting chambers and forming a cleaned chamber air of the inspection corridor located between the dust collection chambers along their entire length and above the inlet chamber To enter polluted air, the side slopes of the gable deflecting screen of the inlet filter chamber are hermetically connected to the inner side walls of the hoppers and forming an inspection corridor under the gable deflecting screen, the filter bag regeneration control mechanism is equipped with a regeneration trolley located in the inspection corridor of the cleaned air with a motor gearbox and a drive sprocket on its output shaft, a duplex circuit serving as a "gear rack" laid with tension in the [-shaped rail, which is mounted on a supporting support mounted on a horizontal platform of the inspection corridor of the cleaned air chamber in its center, with the formation of a “rack engagement” of the drive sprocket of the geared motor with a duplex chain, as well as a sliding rail device with running trolleys for an electric cable installed on the beams of the ceiling of the cleaned air chamber above the inspection corridor, additional centrifugal fans of the filter regeneration mechanism The flax sleeves are mounted on a regeneration trolley with the arrangement of fan housings according to the PR 90 ° and L 90 ° schemes and the connection to their discharge nozzles of the purge deflectors with internal guide vanes and side wings, which are made to ensure that they overlap three rows of filter bags of both dust collectors with a purge the middle row of filter bags and cantilever mounted on the regeneration trolley with the formation of a transport gap between the deflectors and the open ends of the filter oval sleeves, the inspection camera is mounted under a horizontal platform with a vertical wall covering a T-shaped partitions and is provided with an input opening and an inspection door for input of the purified air, placed on the horizontal platform.

Bag filter for three-stage air purification from mechanical impurities according to claim 1, characterized in that the regeneration trolley is made in the form of a frame, which is equipped with four horizontal and four vertical half shafts with running and centering ball-bearing rollers mounted on them, the first of which are placed in the running [ -shaped rails mounted on the side walls of the inspection corridor of the cleaned air chamber, and the second mounted on a regeneration trolley with the formation of an adjustable conveyor deleterious gap between the centering rollers and the side walls of the corridor inspection purified air chamber.

The proof of the materiality of the differences and the relationship of the features with the achieved technical results are disclosed sequentially in the following order.

1. Reducing operating costs and the cost of manufacturing a filter.

2. Extension of filter functionality.

The technical result, which consists in reducing operating costs and the cost of manufacturing a filter, is provided by the following advantages of the proposed solution over the known.

1. Increasing the operational reliability of the mechanism for controlling the regeneration of filter bags and reducing the cost of the electrical circuit.

2. The elimination of special processing of compressed air together with the station due to the rejection of the use of compressed air.

3. Elimination of operating costs for heating the air in the service chamber in the cold season.

4. Reducing the cost of the mechanism for controlling the regeneration of filter bags by reducing its material consumption.

5. Reducing operating costs for installation and maintenance of the panel of air cell filters.

Obtaining these advantages is carried out due to technical solutions.

1. The cleaned air chamber is installed with coverage of the perforated plates of the dust collecting chambers and above the open ends of the filter bags with the horizontal platform of the T-shaped partition below the perforated plates of the dust collecting chambers and forming an inspection corridor in the cleaned air chamber located between the dust collecting chambers along their entire length and above input camera filter.

2. The filter bag regeneration mechanism is equipped with an additional centrifugal fan, the filter bag regeneration control mechanism is equipped with a regeneration trolley located in the inspection corridor of the cleaned air chamber, with a gear motor mounted on it and a drive sprocket on its output shaft, a duplex circuit serving as a “gear” rail ", laid with tension in the [-shaped guide, which is fixed on the horizontal platform of the inspection corridor of the cleaned air chamber along its center labor, with the formation of “rack gearing” of the drive sprocket of the geared motor with a duplex chain, as well as a sliding rail device with running trolleys for the electric cable mounted on the beams of the ceiling of the cleaned air chamber above the inspection corridor, additional centrifugal fans of the filter bag regeneration mechanism are installed on regeneration trolley with the arrangement of fan housings according to the scheme PR 90 ° and L 90 ° and connection to their discharge nozzles of purge deflectors with internal guide vanes and side wings, which are made to ensure that they overlap three rows of filter bags of both dust collectors with a purge of the middle row of filter bags and are cantilevered on a regeneration trolley with the formation of a transport gap between the deflectors and the open ends of the filter bags. The regeneration trolley is made in the form of a frame, which is equipped with four horizontal and four vertical half shafts with running and bumper ball-bearing rollers mounted on them, the first of which are placed in the running [-shaped rails mounted on the side walls of the inspection corridor of the cleaned air chamber, and the second are mounted on regeneration trolley with the formation of an adjustable transport gap between the centering rollers and the side walls of the inspection corridor of the chamber cleaned during spirit.

3. The chamber of the additionally purified air is equipped with an inspection corridor, an additional opening for the outlet of additionally purified air, and an inspection door, which is located in the vertical wall of the T-shaped partition.

4. The filter is equipped with an inspection chamber, which is installed under a horizontal platform, with a vertical wall covering a T-shaped partition and equipped with an entrance inspection door and a hole for introducing purified air, placed in a horizontal platform.

The additional dust collection chamber is divided by a blank transverse partition dividing the panel of air cell filters into two sections, with the formation of a second additional dust collection chamber having individual openings for the entrance of purified air and the discharge of contaminated purge air. The openings for entering the cleaned air into the additional dust collection chambers are located in the vertical wall and in the horizontal platform of the T-shaped partition, and for the output of contaminated purge air in the bottom of the additional dust collection chambers, the additional cleaned air outlet manifold is equipped with branch-ducts that are connected to the additional outlet openings purified air, placed in the bottom of the inspection corridor of the chamber of additionally purified air, the inlet hole of air, located in the bottom of the horizontal platform of the T-shaped partition, is connected by an air duct to the inlet of the second additional dust collection chamber. The collector for the output of contaminated purge air is equipped with branches-ducts that are connected to the holes for the output of contaminated purge air from the additional dust collection chambers.

The control mechanism for the regeneration of the panel of air cell filters is equipped with controlled air dampers installed in the ducts at the inlet and outlet of the second additional dust collection chamber, as well as at the outlet of the additional purified air from the chamber.

The first technical solution in comparison with the filter prototype provides the following.

1. Lower operating costs due to:

- the location of the open ends of the entire set of filter bags in one chamber of purified air, and not in different valve boxes with inspection hatches, as well as the formation of an inspection corridor, which reduces labor costs for installing a new and dismantling a worn set of bags for both dust collecting chambers;

- the location of the cleaned air chamber above the open ends of the filter bags, which eliminates valve boxes with inspection hatches, which have rubber seals that require maintenance and periodic replacement as their elasticity is lost.

2. Reducing the cost of manufacturing a filter due to:

- the location of the cleaned air chamber above the open ends of the filter bags and the formation of an inspection corridor with a depth that ensures placement of a regeneration trolley in the corridor, which reduces the height of the purge deflectors by the height of the inspection corridor, their metal consumption and cost;

- placing an inspection corridor of the cleaned air chamber along the entire length of the dust collecting chambers and above the inlet chamber for introducing contaminated air, which allows the regeneration trolley to roll onto the inlet chamber to wait for the next regeneration cycle, and during the regeneration mode to provide regeneration of the bags of the extreme row of filter bags of both dust collecting chambers , which reduces their length and cost.

The first technical solution in comparison with an analog filter provides a reduction in operating costs due to:

- the formation of an inspection corridor in the cleaned air chamber, which allows reducing labor costs for assembling a new and dismantling a worn-out set of hoses, as well as for servicing a purge fan, a regeneration carriage drive and a sliding rail device with running carriages for an electric cable;

- the formation of an inspection corridor in the cleaned air chamber, which, during the breakdown of the electric cable, which is possible from repeated bending when moving the regeneration trolley and the formation of sparks, will perceive the falling sparks, extinguish them and protect the fabric filter bags from fire and thereby eliminate the additional acquisition costs new filter bags instead of burnt ones.

The second technical solution in comparison with the filter prototype provides the following.

1. Reducing operating costs by replacing the complex mechanism for controlling the regeneration of filter bags using pneumatic cylinders with valves on their rods with a simple mechanism for controlling the regeneration of filter bags in the form of a regeneration trolley located inside the cleaned air chamber, which has a simple wiring diagram and high operational reliability, not requiring repairs, the use of compressed air and additional heating of the air in the service chamber in the cold season, which fixed.

2. Reducing the cost of manufacturing the filter through the use of a regeneration trolley, which eliminates:

- service camera;

- valve boxes mounted on perforated plates;

- purge manifold;

- inspection hatches in each section of filter bags;

- pneumatic cylinders with self-adjusting valves on the rods;

- electromagnetic air distributors;

- PURF device for controlling electromagnets of air distributors;

- compressed air preparation station.

The second technical solution in comparison with an analog filter provides:

1. Lower operating costs due to:

- replacing one purge axial fan with a square body and a lower air flow outlet into the 2.4 m deflector installed inside the regeneration trolley and not providing uniform purge of the filter bags along the length of the row of 12 bags with two additional centrifugal fans, equipped with purge deflectors 1050 mm long with guide vanes and side wings overlapping three rows of filter bags of both dust collecting chambers and providing simultaneously high-quality purge of 10 bags, unhindered dusting from regenerated bags, the same service life of the entire set of filter bags and the simultaneous replacement of the entire set of worn bags with new bags compared to non-simultaneous replacement with uneven purging of bags;

- replacement of two duplex chains serving as “gear racks” with a drive shaft and two sprockets, with one duplex chain laid with tension in the [-shaped guide in the center of the inspection corridor, and one sprocket mounted on the output shaft of the gear motor, which ensures the movement of the regeneration trolley without distortions and jamming, causing additional operating costs.

2. Reducing the cost of driving the regeneration carriage by replacing the drive shaft with two bearing bearings with two sprockets and two duplex chains serving as "gear racks" mounted on the guide rails, by one duplex chain with an asterisk mounted on the motor output shaft gearbox.

The third technical solution provides a reduction in operating costs by supplying the chamber with additionally purified air with an inspection corridor and an inspection door, allowing installation and dismantling of the panel of air cell filters and their maintenance with the lowest labor costs.

The fourth technical solution provides a reduction in operating costs due to the introduction of the regeneration mechanism of the panel of air cell filters of the FCF, which does not allow dust to accumulate on it in large quantities, which eliminates the possibility of dust explosions in the chamber for additional dust collection. The absence of dust explosions eliminates filter repair repairs and, as a result, reduces operating costs.

The technical result, which consists in expanding the functionality of the filter, is provided by the following advantages of the proposed solution over the known.

1. The creation of stability to obtain high efficiency air purification E,%, in the filter.

2. By creating the ability to install a bag filter on the roof of a building located above the production room, by reducing the height of the filter.

The stability of obtaining high efficiency air purification E,%, is created by the first, second, fourth and fifth technical solutions.

5. The filter is equipped with an additional hopper with an unloading device and a lock gate, the regeneration control mechanism of the panel of air cell filters is equipped with controlled air dampers installed in the air ducts at the inlet and outlet of the second additional dust collection chamber, as well as at the outlet of the chamber of additional purified air and additionally providing together with individual centrifugal purge fan regeneration mode of the panel of air mesh filters by reverse section purging the panel with additionally purified air and returning the polluted purging air to the inlet chamber of the filter through a separately allocated pipeline line.

The first technical solution eliminates the division of filter bags into sections, the regeneration control mechanisms of which can fail. The second technical solution replaces the complex mechanism for controlling the regeneration of filter bags with the help of a group of pneumatic cylinders with valves on the rods and electromagnetic air distributors that may fail, with a simple mechanism for controlling the regeneration of filter bags in the form of one regeneration trolley located inside the cleaned air chamber with a simple wiring diagram control and high operational reliability, providing timely and high-quality dusty regeneration filter bags both dust collecting chambers, and, consequently, a constant air purification efficiency, E,%, in the filtration and regeneration modes.

The fourth technical solution creates separate streams of output from the filter of additionally purified and contaminated purge air, which ensures constant efficiency of air purification E,%, in the modes of filtration and regeneration of filter bags.

The fifth technical solution provides for the regeneration of sections of the panel of air cell filters with additionally purified air, which eliminates the accumulation of dust on the inner surface of the air cell filters during their purging and, as a result, ensures constant efficiency of air cleaning, E,%, both at the beginning and in the entire cycle of the filtering mode.

The creation of the ability to install a bag filter on the roof of a building located above the production room is carried out through three technical solutions (1, 2, 6).

6. The bag filter is equipped with an additional supply pipe for polluted air, an additional hopper with a discharge device and a lock gate, each of the dust collecting chambers with filter bags is mounted on an individual hopper, the side slopes of the gable deflecting screen of the filter inlet chamber are hermetically connected to the inner side walls of the bunkers, the discharge pipe individual centrifugal purge fan is connected by an air duct to the filter inlet chamber at its center .

The first and second technical solutions create a new mechanism for controlling the regeneration of filter bags in the form of a regeneration trolley placed in the cleaned air chamber and not needing a service chamber and valve boxes having a total height (2 + 0.5) = 2.5 m. The indicated technical solutions reduce filter height by 2.5 m.

The sixth technical solution reduces the height of the filter by supplying the filter with an additional hopper with an unloading device and a sluice unloader and installing each of the dust collecting chambers on an individual hopper, which makes it possible to reduce the width of one hopper from 4 m to 1.3 m with a filter width of 4 m two bunkers and with an angle of inclination of the side walls of the bunker equal to α = 60 °, reduce the height of the bunker from 2.9 m to 0.7 m, i.e. 2.2 m.

Technical solutions (1, 2, 6) provide a filter height reduction of 4.7 m.

The installation of a bag filter on the roof eliminates the need for a closed chain conveyor installed in the prototype filter under a lock gate having a height together with a loading pipe equal to h _{c k} = 1.0 m.

Thus, the claimed solution reduces the height of the filter by 5.7 m and allows you to create a filter with a height of h _f = 5.35 m. The specified filter height is formed from:

- the height of the chamber of purified air in the inspection corridor, equal to h _to. = 1.8 m;

- the height of the chamber additionally purified air in the inspection corridor, equal to h _to. = 1,95 m;

- the height of the hopper together with the support belt equal to h _b = 0.8 m;

- the height of the lock gate, equal to h _WZ = 0.6 m;

- technological gap between the rotary valve and a roof overlapping _TZ h = 0.2 m, required for the flange connection of the riser duct to remove mechanical impurities to the flange seal leg. In this case, the length of the filter bags will be _l.f.r = 2.25 m.

The presence of two bins in the inventive filter requires a uniform distribution of contaminated air coming from the process equipment in the filtration mode and the polluted purge air in the regeneration mode between the dust collecting chambers installed above the bins.

In the claimed solution, the contaminated air from the process equipment is supplied by the main centrifugal fan through two inlet pipelines to the end part of the inlet chamber, and the contaminated purge air is supplied by the purge fan through the air duct to the inlet chamber at its center above the crest of the gable deflecting screen, which evenly distributes the contaminated air through the dust collection cameras.

The installation of a bag filter on the roof of the building located above the production room allows the supply of contaminated air and a recirculation duct through the roof to the production room, as well as unloading mechanical impurities from the hoppers through vertical pipelines connected to the gate valves and passing through the roof directly into the collecting tee installed in the production room (not shown in the drawings). The tee with its outlet is hermetically connected to the inlet of the closed chain scraper conveyor manufactured by Grain-Wood. The conveyor passes through an opening in the wall of the production room and is unloaded into a container installed on an open industrial site. The conveyor and container are not shown in the drawings.

The claimed solution providing a roof design of a bag filter eliminates:

- sections of the supply pipe of polluted air and recirculated air, previously placed on an open industrial site, which reduces the length of the pipeline and duct and, as a result, reduces the consumption of metal for their manufacture and eliminates the consumption of heat-insulating material for their coating;

- a storage hopper for storing mechanical impurities with a screw-spring unloading device having a drive motor with an installed power of N _y = 5.5 kW, which reduces the cost of equipment for centralized dust collection and operating costs for dust transportation and unloading in the amount of ΔN = 0.5 × 5.5 = 2.75 kWh (where 0.5 is the utilization factor of the discharge device).

During two-shift operation, the annual energy saving from the reduced equipment is ΔN _year = 2.75 · 4168 = 11462 kWh / year, and resource saving, respectively

(t.u - tons of standard fuel), which in ruble terms and prices of 2010 form the annual savings Egod = ΔB _N · Ts _t.u. = 4.125 × 8924.6 = 36814 rubles / year.

In addition, on the open industrial site, the space previously occupied by the baghouse and equipment for the centralized collection of mechanical impurities (storage hopper) is freed up and the design of the open industrial site is improved.

The design of the inventive bag filter is illustrated by the drawings in figures 1-10. Figure 1 presents the filter bag in the plan; figure 2 is a view A (figure 1) on the filter from the location of the fans, the supply piping of polluted air and recirculation duct; figure 3 is a section aa (figure 1) of the inlet chamber for introducing a contaminated air stream and a purified air chamber located above it with an inspection corridor and a regeneration trolley; in Fig.4 is a section bb (in Fig.1) of the inspection chamber and the purified air chamber located above it with an inspection corridor and a regeneration trolley; in Fig.5 is a section CC (in Fig.1) of dust collecting chambers with filter bags, chambers of purified, additionally purified air and additional dust collection, as well as filter hoppers; in Fig.6 is a section of the DD filter (in Fig.1), containing an inlet chamber for introducing contaminated air, a purified air chamber with a regeneration trolley and a sliding rail device for an electric cable, an inspection chamber, an additional dust collection chamber and an additional purified air chamber, collectors for the output of additionally purified and contaminated purge air, centrifugal fans; Fig.7 is a view In (Fig.1) on the filter from its end; in Fig.8 is a view C (in Fig.1) on the side of the filter with safety doors; figure 9 is a section GG (figure 1) with a regeneration trolley and a gear motor with an asterisk in mesh with the duplex chain, which serves as a "gear rack"; figure 10 is a view of D (figure 6) on the tensioner duplex circuit located on the end wall of the chamber of purified air (axonometry rotated 180 °).

The filter (Fig. 1) is composed of a frame 1, two dust-collecting chambers 2, 3 installed with a gap between their sides, (Fig. 5) with vertically arranged frame filter arms 4 fixed with their upper open ends on the perforated plates 5 using double snap ring rings 6 (Fig. 9), inlet pipelines of contaminated air 7 (Fig. 2), an inlet chamber for introducing contaminated air 8 (Fig. 6) with a gable deflecting screen 9 (Fig. 3), a purified air chamber 10, a chamber extra Pts of the searched air 11 (Fig. 6), separated by a T-shaped partition 12 having a horizontal platform 13 and a vertical wall 14 lowered downward, on one side of which in the chamber 11 there is installed at least a single-row panel of air cell filters 15 of the type FAC ( 5) with inner wire frames 16 (FIG. 6) and the formation of the bottom of the panel 15 of two additional dust collection chambers 17, 18, separated by a transverse partition 19, which divides the PFC panel into two sections 20, 21. The camera is additionally cleaned ha 11 (Figure 5) is provided with an inspection corridor 22 and the inspection door 23 (Figure 6). The additional dust collection chambers 17 and 18 are provided at the inlet with openings for introducing purified air 24, 25 and openings for discharging contaminated purge air 26, 27 (Fig. 6). The hole 25 is connected by an air duct 28 to the hole 29 in the horizontal platform 13 for withdrawing purified air from the chamber 10 (Fig.6). The additionally purified air chamber 11 is provided with openings for the output of additionally purified air 30, 31 (Fig. 6) in the filtration mode located at the bottom 32 of the inspection corridor 22 (Fig. 5).

In the filter sleeves 4 are placed the wire frames 33 connected along the length of the lock (Fig. 9), which are fixed in the sleeves using a cloth loop 34 sewn into the inner edge of the sleeve. The loop is bent around the upper ring of the wire frame 33 and sewed into the inner seam of the sleeve.

The filter also contains at least one main centrifugal fan 35 (FIG. 2) and a recirculation duct 36, hoppers 37, 38 (FIG. 3) installed under the filter bags 4, having inclined walls and a flat bottom with a discharge device 39 (FIG. 6) in the form of a chain scraper conveyor and an unloading hole 40 for dust removal, equipped with a slide gate 41 and a flange pipe for attaching the lock gate 42, the collector for outputting additional purified air 43 from the chamber 11 (Fig. 6), connected at the outlet to the suction pa felling of the main centrifugal fan 35, the discharge pipe of which is connected to the recirculation duct 36, the regeneration mechanism of the sections 20, 21 of the panel of air cell filters 15 is made of a centrifugal purge fan 47, a collector for the output of contaminated purge air 45 from the additional dust collection chambers 17 and 18, connected at the inlet with holes 26 and 27 through the duct 46, and at the outlet with the suction pipe of the centrifugal purge fan 47, the discharge pipe of which is connected to feeding contaminated purge air oprovodom 48 with the inlet chamber 8 from its keeper (2). The side slopes of the gable deflecting screen 9 (Fig. 3) are hermetically connected to the side inner walls of the bins 37, 38. Each of the dust collecting chambers 2 and 3 with filter bags 4 is mounted on an individual bunker 37 and 38 (Fig. 5), the purified air chamber 10 installed with a coverage of the perforated plates 5 of the dust collecting chambers 2 and 3 and above the open ends of the filter bags 4 with the horizontal platform 13 of the T-shaped partition 12 below the perforated plates 5 of the dust collecting chambers 2 and 3 (FIG. 5) and forming Amer purified air 10 inspection corridors 49 arranged between the dust collecting chamber 2, and 3 along their entire length and over inlet chamber 8 (Figure 6). The dust trapped by the filter bags is removed from the bins 37 and 38 by unloading devices 39 and through the discharge openings 40 with open shutter dampers 41 it is fed by gate unloaders into vertical pipelines 50, through which dust is poured into a tee (not shown), installed in the production room. The tee is unloaded into a closed chain conveyor manufactured by Grain-Wood, which passes through a hole in the wall and unloads dust into a container installed on an open industrial site (not shown in the drawings). The regeneration mechanism of the filter bags 4 is made in the form of two centrifugal fans 51, 52 mounted on a regeneration trolley 53 with the arrangement of fan housings according to the PR 90 ° and L 90 ° scheme and the purge deflectors 54 with internal guide vanes 55 and side wings attached to their discharge pipes 56 (figure 1, 6), which are made so that they overlap three rows of filter bags 4 of both dust collectors 2 and 3 when the deflectors 54 blow the middle row of filter bags, and the cantilever fixed by means of angles 57 on the regeneration trolley 53 with the formation of a transport gap between the deflectors 54 and the open ends of the filter bags 4. The mechanism for controlling the regeneration of the filter bags is made in the form of a regeneration trolley 53 (Fig. 9) located in the inspection corridor 49 of the cleaned air chamber 10 with installed on it a gear motor 58 and a drive sprocket 59 on its output shaft, a duplex chain 60, serving as a "gear rack", laid with tension in a [-shaped rail 61, which closes captivity on the supporting support 100, mounted on a horizontal platform 13 of the inspection corridor 49 of the cleaned air chamber 10 in its center, with the formation of a “rack mesh” of the drive sprocket 59 of the gear motor 58 with duplex chain 60, as well as a sliding rail device 62 (FIG. 6) with running trolleys 63 for the electric cable 64 installed on the ceiling beams 65 of the cleaned air chamber 10 above the inspection corridor 49. The filter is equipped with an inspection chamber 66 (Fig.6), which is installed under a horizontal platform 13 with coverage the vertical wall 14 of the T-shaped partition 12 and the inspection door 23 and has an opening 67 in the horizontal platform 13 for the purified air to exit from the chamber 10 and an opening 24 located in the vertical wall 14 for the purified air to enter the additional dust collection chamber 17, and an entrance door 68. The purified air chamber 10 is equipped with an inspection door 69 (FIGS. 2, 5, 6), and the electric cable 64 is connected to the control cabinet 86. The entrance to the inspection chamber 66 is through the platform 70 (FIG. 1). The regeneration control mechanism of sections 20, 21 of the air cell filter panel 15 is made of eight controllable air dampers:

- 71, 72 installed in the supply pipelines of contaminated air in front of the inlet chamber 8 of the filter (figure 1);

- 73, 74 installed at the entrance to the openings 24, 25 of the additional dust collection chambers 17 and 18 (Fig.6);

- 75, 76 installed on the ducts 44 of the collector output additional purified air 43 from the chamber 11 (Fig.6);

- 77, 78 installed on the ducts 46 of the collector output of contaminated purge air 45 from the chambers 17 and 18 (Fig.6).

The regeneration trolley 53 comprises a frame 79 (Fig. 9), which is equipped with four horizontal 80 and four vertical 81 half shafts with running 82 and centering 83 ball-bearing rollers mounted on them. The running rollers 82 of the regeneration trolley 53 are mounted in guide rails 84 mounted on the side walls of the inspection corridor 49 of the cleaned air chamber 10 (FIG. 5). The dust collecting chambers 2 and 3 are equipped with safety doors 85. The recirculation duct 36 is equipped with fire-retardant valves 87, 88.

In this case, the fire retardant valve 87 is normally open and the valve 88 is normally closed. At the outlet of the valve 88, a square bend 89 is installed, deployed with the open hole 90 down, communicating with the atmosphere. In the event of a fire, the fire retardant valve 87 closes, and the valve 88 opens, allowing air to be discharged from the filter by the fan 35 through the opening 90 of the exhaust 89 into the atmosphere. Recirculation duct 36 and pipe 48 for supplying contaminated purge air to the inlet chamber are provided with throttles 91 and 92 for outputting the main 35 and purge 47 fans to the design modes.

The tension device 93 of the duplex chain 60 (Figs. 1, 10) consists of a guide roller 94, the axis of which is mounted in a support 95 fixed to the end wall of the cleaned air chamber 10, an earring 96 connected to the duplex chain 60 by a pin and a pin 97 passed through the hole in the wall support 98 and the adjusting nut 99 mounted on the stud 97. When the nut 99 is tightened, the duplex circuit 60 is tensioned.

To ensure fire safety, the filter is equipped with standard systems:

- filter grounding;

- prevention of dust accumulation in the bunker part of the filter;

- detection of fire dust in the filter and fire fighting;

- fire retention in the event of a fire in the filter to prevent the ingress of fire into the air distributor installed in the workshop, and supply pipelines.

The aforementioned fire safety systems in the filter are not considered in the claimed solution.

The bag filter can operate in three modes.

1. All filter bags 4 and sections 20, 21 of the air cell filter panel 15 are in the filtering mode.

2. Regular regeneration of the filter bags of both dust collecting chambers is carried out by reverse purging of the bags with purified air using additional centrifugal fans 51, 52 located on a mobile regeneration trolley. At the same time, in two adjacent rows of filter bags with a purged row, the filtration mode is terminated, and the remaining filter bags 4 and sections 20, 21 of the panel of air cell filters 15 are in the filtration mode.

3. Regeneration mode of the panel 15 air cell filters (reverse sectional purging of air cell filters with additionally purified air using a purge fan 47 in the suction mode).

Modes 1 and 2 are carried out with the technological equipment running, and mode 3 with the technological equipment switched off, after the end of work shifts.

The filter in the filtering mode (figure 2) works as follows. Contaminated air containing wood grinding dust and to be cleaned from the inlet transport pipelines 7 enters the upper part of the inlet chamber 8 for the input of contaminated air. Air flows go down and enter the hoppers 37 and 38 (Fig. 3) and then into the dust collecting chambers 2 and 3 (Fig. 5), in which vertically located filter bags 4 with inner composite wire frames 33 with an external working surface are placed. In this case, dust particles with a size of more than 150 μm are separated from the air in the inlet chamber 8, which acts as a dust precipitation chamber, and fall out in the hoppers 37 and 38 of the filter.

Air dusted with small particles with sizes less than 150 microns enters the area of the filter bags 4. In this case, air passes through the fabric of the bags along their entire height and enters through the open part of the bags 4 into the cleaned air chamber 10. Since the bags 4 are made of glazed polyester, which does not hold the dust layer on its working surface, the dust flows from the sleeves and falls into the bins 37, 38, from which it is removed through the discharge openings 40 and the lock gates 42 vertically with scraper chain conveyors 39 (Fig. 6) pipelines 50 through which it is poured into a collecting tee installed in the production room. From the tee, the dust enters the loading opening of a closed chain scraper conveyor, which transfers the dust to a container installed on an open industrial site. A small part of the dust remains inside the filter cloth of the sleeves. In filtration mode, controlled air dampers are open:

- 71, 72 located on the inlet pipelines of polluted air (figure 1);

- 73, 74, located at the entrance to the openings 24 and 25 of the additional dust collection chambers 17 and 18 (Fig.6);

- 75, 76, located at the outlet of the openings 30, 31 of the additionally purified air chamber 11 and installed on the air ducts 44 of the additionally purified air outlet 43 collector.

In the filtration mode, the controlled air dampers 77, 78 located at the outlet of the openings 26, 27 of the additional dust collection chambers 17 and 18 and installed on the air ducts 46 of the polluted purge air outlet manifold 45 are closed. The air containing wood particles with a size of less than 10 is cleaned in the sleeves 4 μm, from the chamber 10 enters the chambers of additional dust collection 17 and 18 in two ways:

- into the chamber 17 through the openings 67 in the horizontal platform 13, the inspection chamber 66 and the open controlled air damper 73 (Fig.6);

- into the chamber 18 through the hole 29 in the horizontal platform 13, the duct 28 and the open controlled air damper 74 (Fig.6).

From the additional dust collection chambers 17 and 18, the cleaned air passes through sections 20, 21 of the cell panel of the FCF air cell filters with inner frames 6 into the chamber of additional purified air 11 (Fig. 6), from which through openings 30, 31 in the bottom 32 of the inspection corridor 22 ( 5) leaves through open controlled air dampers 75, 76 through air ducts 44 to the output manifold of additional purified air 43 (FIG. 6).

From the manifold 43, additionally purified air is supplied by the main centrifugal fan 35 to the recirculation duct 36. In this case, the fire retardant valve 87 is open and the fire retardant valve 88 is closed. From the recirculation duct 36, additionally purified air enters the air distributor installed in the production room (not shown in the drawings). The filter bags 4 of the dust collecting chambers 2 and 3 will be in the filtration mode, the estimated time controlled by the time relay, after which the bag regeneration mode 4 starts. The duration of the filtration mode, characterizing the length of the interval between regeneration periods, depends on the initial concentration of wood dust С _n , mg / m ³ in the supply pipelines of polluted air 7 and is installed on a time relay. For workshops of white grinding С _н ≈3000 mg / m ³ , and for workshops of grinding plywood С _н ≈6950 mg / m ³ .

A filter with a three-stage air purification system with air purification coefficients in the inlet chamber η ₁ = 0.5, filter bags η ₂ = 0.999, cell air filter panels of the FJAK type, class F8 / 9 (EU8 / 9), index 8841 η ₃ = 0.98 provides a total air cleaning ratio

η _1,2,3 = 1- (1-η ₁ ) (1-η ₂ ) (1-η ₃ ) = 1- (1-0,5) (1-0,999) (1-0,98) = 0.99999, slip coefficient N _1,2,3 = (1-η _1,2,3 ) = 0,00001 and cleaning efficiency E _1,2,3 = 100 η _1,2,3 = 99,999%.

The second mode of regeneration of filter bags (cleaning critically dusty fabric of bags from dust to an equilibrium dusty state) is carried out by the method of sequential backblowing of the rows of bags of both dust collecting chambers 2 and 3 with purified air using a moving regeneration trolley.

At the beginning of the regeneration of the rows of filter bags 4, the motors of the additional centrifugal fans 51, 52 mounted on the regeneration trolley 53 are turned on, which draw air from the hoppers 37 and 38 through the filter bags 4. After the impellers of the centrifugal fans 51, 52 are accelerated, the time of which is set on the relay time, the gear motor 58 of the regeneration trolley 53 is turned on, which starts moving inside the inspection corridor 49 (Figs. 1, 6). At the same time, purge deflectors with side wings constantly overlap three rows of sleeves with purge of the middle row sleeves.

In the regeneration mode, an increased amount of air passes through the filter bags in comparison with the filtration mode, equal to L _Σ = L _AC + L _CR (where L _AC is the capacity of the main centrifugal fan 35 and L _CR is the total capacity of additional centrifugal fans 51, 52 supplying purge air into the deflectors 54). The air cleaned in the sleeves with the help of fans 35, 51, 52 enters the purified air chamber 10. The purge air in the amount of L _pr is supplied by the fans 51, 52 through the deflectors 54, 55 to the purged series of filter bags, and the main part of the air in the amount of L _{AC is the} fan 35 is fed through openings 67, 29 in the horizontal platform 13, the inspection chamber 66 and open controlled air dampers 73, 74 into the additional dust collection chambers 17 and 18 and then into sections 20, 21 of the single-row panel of air filter cells type ФЯК 15 with internal The lower frames 16 for additional air purification. While wings 56 on the purge deflectors 54, 55 overlap adjacent rows of filter bags located one at a time from the blown row of bags. At the same time, filtering in adjacent rows of hoses overlapped by side wings 56 almost completely stops, which ensures normal dust blowing from the filter fabric of the blown row of sleeves and its free flowing into hoppers 37, 38. When the regeneration carriage 53 moves along the inspection corridor 49 of the cleaned air chamber 10 there is a smooth exit of the blown row of bags from the regeneration mode and a smooth entry of the next row of filter bags into the regeneration mode without air impact, which took place in the filter prototype, which increases the service life of the filter bags and reduces operating costs. When moving the regeneration trolley 53, the rows of filter bags 4 of both dust collecting chambers 2 and 3 are sequentially regenerated. After the regeneration mode of the filter bags is completed, the regeneration trolley 53 drives the input chamber 8 without changing the speed until the end switch closes (not shown in the drawings). In this case, the gear motor 58 of the regeneration trolley 53 and the additional centrifugal fans 51, 52 are turned off, and the timer for the filtration mode is also turned on. After the time relay is activated, the filtration mode is terminated and a new cycle of regeneration of the rows of filter bags begins. In this case, additional centrifugal fans 51, 52 and a gear motor 58 of the regeneration trolley 53 are turned on for reverse rotation, which ensures that the regeneration trolley 53 moves in the opposite direction along the inspection corridor. After the regeneration of all rows of filter bags and the exit of the side wings 56 of the deflectors 54 beyond the extreme row of filter bags, the regeneration trolley 53 closes the second limit switch (not shown in the drawings). In this case, the gear motor 58 of the regeneration trolley 53 and the additional centrifugal fans 51, 52 are turned off, and the timer for the filtration mode is also turned on.

The third mode of regeneration of the panel of air cell filters 15 of the type of FCN can be illustrated by the example of Fig.6. The work of the mechanisms is carried out in the following sequence.

First, the regeneration of section 21 takes place, and then section 20 of panel 15 of the FCN.

During the regeneration of sections 20, 21 of the PFC panel, four controlled air dampers must be constantly closed:

- 71, 72 installed on the inlet pipelines of polluted air 7, sealing the inlet chamber 8 and dust collecting chambers 2 and 3;

- 75, 76, installed at the outlet of the openings 30, 31 in the bottom 32 of the inspection corridor 22 of the additionally purified air chamber 11 and belonging to the output line of the additionally purified air. In this case, the main centrifugal fan 35 is turned off.

During the regeneration of section 21 of the FAC panel, two controlled air dampers open:

- 73, installed at the entrance to the hole 24 of the additional dust collection chamber 17;

- 78, installed at the outlet of the opening 27 of the additional dust collection chamber 18.

Additionally, two controlled air dampers are closed:

- 74, installed at the entrance to the hole 25 of the chamber for additional dust collection 18;

- 77, installed at the outlet of the hole 26 of the additional dust collection chamber 17.

After that, the purge centrifugal fan 47 is turned on, which takes air from the hoppers 37 and 38, draws it in the suction mode through the filter bags 4 with the inner wire frames 33 into the cleaned air chamber 10.

From the chamber 10, the cleaned air exits through the opening 67 into the inspection chamber 66, from which through the open air damper 73 it enters the chamber for additional dust collection 17, it is cleaned in section 20 of the FCF panel and enters the chamber of additionally purified air 11. From the chamber 11, additionally purified air extends through section 21 of the panel 15 of the FSC into the chamber for additional dust collection 18, from which through hole 27, the open air damper 78 and duct 46 enters the collector 45 of the output of the polluted purge ear. When this happens, the section 21 of the panel 15 of the FCN is purged with additionally purified air, the polluted purge air from the collector 45 is supplied by the centrifugal purge fan 47 through the pipe 48 to the inlet chamber 8. Since the pipe 48 is located in the center of the chamber 8, the polluted purge air enters the chamber 8 above ridge gable deflecting screen 9 which separates the dirty air stream into two parts then coming into hoppers 37 and 38. Given that the decontamination factor inlet chamber 8 is η ₁ = 0.5, Approximately 50% of the dust contained in the polluted air falls into the bins 37, 38, of which the precipitated dust is discharged into the vertical pipelines 50 by unloading devices 39. The polluted air then flows to the filter bags 4 sewn from the glazed fabric, from which the dust flows into the bins 37, 38 and is removed from them by unloading devices 39 into vertical pipelines 50, and air enters through the filter bags 4 into the purified air chamber 10.

During the regeneration of section 20 of the PFC panel, two controlled air dampers open:

- 74, installed at the entrance to the hole 25 of the chamber for additional dust collection 18;

- 77, installed at the outlet of the hole 26 of the additional dust collection chamber 17.

Additionally, two controlled air dampers are closed:

- 73, installed at the entrance to the hole 24 of the additional dust collection chamber 17;

- 78, installed at the outlet of the opening 27 of the additional dust collection chamber 18.

During regeneration of section 20 of the FCF panel, a centrifugal purge fan 47 draws air from the bins 37 and 38, draws it in the suction mode through the filter bags 4 with the inner wire frames 33 into the cleaned air chamber 10. From the chamber 10, the cleaned air exits through the opening 29 in the horizontal platform 13 into the duct 28, from which through the open air damper 74 enters the chamber for additional dust collection 18, is cleaned in section 21 of the PFC panel, entering the chamber of additional purified air 11. From of the chamber 11, additionally purified air is drawn through the section 20 of the panel 15 of the PFC into the chamber of additional dust collection 17, from which through the opening 26, the open air damper 77 and the duct 46 enters the collector 45 of the output of polluted purge air. When this happens, the purge section 20 of the panel 15 FAC with additionally purified air. Contaminated purge air from the manifold 45 is supplied by a centrifugal purge fan 47 through a pipe 48 to the inlet chamber 8.

The reverse purge of the FFC panel with additionally purified air is carried out once a day. In this case, the dust mass M _p , kg accumulating in the FFK air filters is determined by the formula M _p = (C _nfyak- C _kfyak ) 10 ^-6 L _AC T (where C _nfyak , C _kfyak are the initial and final dust concentrations, respectively, before the additional by cleaning and after additional air purification in the FAC panel, mg / m ³ ; T is the duration of the filtration mode of the FAC panel, h). At the same time, for the plywood grinding workshop at С _н = 6950 mg / m ³ :

η _1,2 = 1- (1-η ₁ ) (1-η ₂ ) = 1- (1-0,5) (1-0,999) = 0,0005.

C _kfyak = С _n N _1,2 = С _n (1-η _1,2 ) = 6950 · 0.0005 = 3.47 mg / m ³

C _kfyak = C _n N _1,2,3 = C _n (1-η _1,2,3 ) = 6950 · 0.00001 = 0.0695 mg / m ³ .

η _1,2,3 = 1- (1-η ₁ ) (1-η ₂ ) (1-η ₃ ) = 1- (1-0,5) (1-0,999) (1-0,98) = 0.99999.

Here C _n is the initial concentration of dust in front of the filter, mg / m ³ , N _1,2 , N _1,2,3 are the dust penetration coefficients for two-stage and three-stage air purification, respectively.

When L _AC = 74800 m ³ / h (2 filters with L _phi = 40,000 m ³ / h), the values of M _p , kg, will be:

- for 2-shift operation (T = 16 h)

panels M _p = (3.47-0.0695) · 10 ^-6 · 74800 · 16 = 4.07 kg

sections M _c = 0.5 M _p = 2.035 kg

- for 3-shift operation (T = 24 h)

panels M _p = (3.47-0.0695) · 10 ^-6 · 74800 · 24 = 6.1 kg

sections M _c = 0.5 M _p = 3.05 kg with L _CR = 20,000 m ³ / h

The duration of the reverse purge of one section of the PFC panel can be taken equal to T = 1 min = 60 s. In this case, an air volume equal to

,

,

and the dust concentration in the purge air at V = 333.3 m ³ is C _p = M _s · 10 ³ / V = 3.05 · 10 ³ / 333.3 = 9.15 g / m ³ <LEL = 12.6 g / m ³ (for wood dust).

From the above calculation it follows that it is sufficient to carry out the backflush with purified air of the PFC panel once a day and for 1 minute each section. At the same time, the concentration of dust generated in the purge air is not explosive.

Shown in Fig.1-10 filter bag for a three-stage air purification from mechanical impurities has a capacity of L _f = 32000 m ³ / h The following data were taken as initial data for calculating the indicated productivity: inner diameter of the sleeve d _int = 150 mm, thickness of the filter cloth S _tk = 2 mm, length of the filter sleeve without cuff l _p = 2.26 m, filtration speed in the filtering mode V _f = 2 m / min The number of hoses in the blown row n _p = 10, the number of hoses blown by one fan, n _p = 5. The number of hoses in one section, covered by a regeneration trolley, n _pc = 30.

In the chamber for additional air purification, a single-row FAC is installed, consisting of two sections of cells of the FAC of class F8 / 9 (EU8 / 9) of index 8841 with an efficiency of E = 98% and a capacity of L _FAC = 1750-2000 m ³ / h.

Based on the given initial data, the following parameters were obtained.

1. The filtering area of one sleeve

F _pi = πd _n l _p + 0.785d _bottom ² = 3.14 · 0.154 · 2.26 + 0.785 · 0.1462 = 1.0928 + 0.0167 = 1.10954 m ² .

2. The filtering area of one section of the sleeves

F _c.p. = n _p.c F _pi = 30.1.10954 = 33.3 m ² .

3. Air flow through one section of the sleeves

L _c = F _c.p V _f = 33.3 · 2.0 = 66.6 m ³ / min = 4000 m ³ / h.

4. The number of sections of the sleeves in the filter at L _f = 32000 m ³ / h

n _c = L _f / L _c = 32000/4 = 8 sections.

5. The number of sleeves in the filter

n _pΣ = n _c n _pc = 8 · 30 = 240.

6. The number of cells of the cell in the chamber for additional air purification

n _FAC = L _f / L _FAC = _32000/2000 = 16 cells.

7. The width of the sheet vertical panels of the chamber of additionally purified air along the mounting planes with a sheet width of In _l = 624 mm

In _p = In _l -2 · 24 = 624-48 = 576 mm.

8. The width of two cells of the FAC index 8841 with a clearance for installation

In _2PNF = 2 · 287 + 2 = 576 mm.

9. The length of the chamber additionally purified air

l _kdov = V _2FK · n _{FK Σ} / 2 + 576.

For L _f = 42000 m ³ / h l _{to dov} = 576 · _20/2 + 576 = 11 · 576 = 6336 mm.

For L _f = 32000 m ³ / h l _{to dov} = 576 · _16/2 + 576 = 9 · 576 = 5184 mm.

10. The length of the filter housing with In _I = V _IR = 2 · 576 = 1152

L _KF = l _{to rows} B + _Rin + _IR

Table 1 shows the parameters of the filter line of various capacities, and in Table 2 the filtering and regeneration modes of the filter bags at L _prΣ = 2L _pri = 2 · 1500 = 3000 m ³ / h (50 m ³ / min).

Table 1 L _f , m ³ / h (m ³ / min) Filter bags FYAK air filters Length m Filtration area F _f , m ² n _c n _pc n _pΣ n _c n _{FAC with} n _{FAC Σ} Cameras
L _{to Dov} Filter housings l _kf 40,000 (666.6) 10 thirty 300 2 10 twenty 6336 8640 333.3 36000 (600) 9 thirty 270 2 9 eighteen 5760 8064 299.7 32000 (533.3) 8 thirty 240 2 8 16 5184 7488 266.4 28000 (466.6) 7 thirty 210 2 7 fourteen 4608 6912 233.1 24000 (400) 6 thirty 180 2 6 12 4032 6336 199.8 20,000 (333.3) 5 thirty 150 2 5 10 3456 5760 166.65

table 2 The parameters L _f , F _f and V _f in the filtering and regeneration of the sleeves Filter index Modes Filter bags Sleeve Regeneration L _f , m ³ / h
(m ³ / min) F _f , m ² V _f , m / s L _f , m ³ / h
(m ³ / min) F _f , m ² V _f , m / s

40,000 (666.6) 333.3 2.0 43000 (716.6) 300 2,39

36000 (600) 299.7 2.0 39000 (650) 266.4 2.44

32000 (533.3) 266.4 2.0 35000 (583.3) 233.1 2.5

28000 (466.6) 233.1 2.0 31000 (516.6 199.8 2,58

24000 (400) 199.8 2.0 27000 (450) 166.5 2.7

20,000 (333.3) 166.5 2.0 23000 (383.3) 133.2 2.87

All of the above, including a description of the operation of the filter, confirms the possibility of its use in industry with obtaining high technical performance compared with the known filter designs. In addition, both in the sources of patent and scientific and technical information, and in industry, such a design did not occur, which indicates that the proposed solution meets the criteria of the invention.

Claims (2)

1. Bag filter for a three-stage air purification from mechanical impurities, containing two dust collecting chambers installed with an interval between their sides and frame filter sleeves vertically located in them, fixed with their upper open ends on perforated plates installed in the upper part of the dust collecting chambers, and a supply pipe of a contaminated air, an inlet chamber for introducing polluted air, equipped with a deflecting gable screen, a cleaned chamber and a ru of additionally purified air, separated by a T-shaped partition having a horizontal platform and a vertical wall lowered downward, on one side of which at least a single-row panel of air filter cells of the type ФЯК, equipped with internal frames, is horizontally installed with the formation of an additional camera bottom panel dust collection and placement on top of the chamber panel of additionally purified air, at least one main centrifugal fan and recirculated air od, a hopper installed under the filter bags and having a discharge device and a lock gate, an additional purified air outlet manifold connected at the outlet to the suction pipe of the main centrifugal fan, the discharge pipe of which is connected to the recirculation duct, a filter bag regeneration mechanism comprising an additional centrifugal fan, a mechanism for regenerating a panel of air cell filters containing a centrifugal fan operating in the suction mode control mechanism for regeneration of filter bags, control mechanism for regeneration of a panel of air cell filters, including controlled air dampers installed in the inlet pipe of polluted air at the inlet to the filter, as well as at the inlet and outlet of the chamber for additional dust collection and at the outlet of the chamber for additional purified air characterized in that the bag filter is equipped with an additional supply pipe of contaminated air, an additional hopper with a discharge unit with a sluice and a lock gate, a collector for the output of contaminated purge air and an inspection chamber, the filter bag regeneration mechanism is equipped with an additional centrifugal fan, the additional dust collection chamber is divided by a blank transverse partition dividing the cell filter panel into two sections with the formation of a second additional dust collection chamber with individual openings for the inlet of purified air and the outlet of contaminated purge air, the chamber will complement The completely cleaned air is equipped with an inspection corridor, an additional hole for the output of additionally cleaned air and an inspection door, which is located in the vertical wall of the T-shaped partition, openings for the entrance of purified air into the additional dust collection chambers are located in the vertical wall and in the horizontal platform of the T-shaped partition, and for the output of contaminated purge air in the bottom of the chambers of additional dust collection, the collector for the output of additional purified air is supplied n branch ducts that are connected to the holes for the output of additionally purified air located in the bottom of the inspection corridor of the chamber of additionally purified air, the hole for the entrance of purified air located in the horizontal platform of the T-shaped partition is connected by an air duct to the inlet of the second chamber of the additional dust collection, the polluted purge air outlet manifold is provided with branch-ducts that are connected to the contaminated outlet openings of purge air from the additional dust collection chambers, the regeneration mechanism of the cell air filter panel is equipped with an individual centrifugal purge fan, the suction pipe of which is connected to the collector for the output of contaminated purge air, and its discharge pipe is connected by an air duct to the input chamber for introducing polluted air into the filter, in its center , the control mechanism for the regeneration of the panel of air cell filters is equipped with controlled air dampers installed in the ducts at the inlet and outlet of the second chamber for additional dust collection, as well as at the outlet of the chamber of additionally cleaned air and additionally providing, together with an individual centrifugal purge fan, the regeneration of the panel of air cell filters by reverse sectional purging of the panel with additionally purified air and the return of polluted purge air to the inlet chamber of the filter along a separate line of pipelines, each of the dust collecting chambers from the filter sleeves installed on an individual hopper, the cleaned air chamber is installed with the perforated plates of the dust collectors covered and above the open ends of the filter bags with the horizontal platform of the T-shaped partition below the perforated dust plates and the formation of an inspection corridor in the cleaned air chamber located between the dust collectors their entire length and above the inlet chamber for the input of contaminated air, the lateral slopes of the gable deflecting The screen of the filter inlet chamber is hermetically connected to the inner side walls of the bins with the formation of an inspection corridor under the gable deflecting screen, the filter bag regeneration control mechanism is equipped with a regeneration trolley located in the inspection corridor of the cleaned air chamber, with a gear motor mounted on it and a drive sprocket on it output shaft, duplex chain, serving as a "gear rack", laid with tension in

-shaped rail, which is mounted on a supporting support mounted on a horizontal platform of the inspection corridor of the cleaned air chamber in its center, with the formation of a “rack mesh” of the drive sprocket of the geared motor with a duplex chain, as well as a sliding rail device with running trolleys to maintain the electric cable installed on the beams of the ceiling of the purified air chamber and above the inspection corridor, additional centrifugal fans of the filter regeneration mechanism of flax sleeves are mounted on a regeneration trolley with the arrangement of fan housings according to the PR 90 ° and Л 90 ° scheme and attachment to their discharge nozzles of purge deflectors with internal guide vanes and side wings, which are made to ensure that they overlap three rows of filter bags of both dust collecting chambers with a purge the middle row of filter bags and cantilever mounted on the regeneration trolley with the formation of a transport gap between the deflectors and the open ends of the filter sleeves, while the inspection chamber is installed under a horizontal platform with a vertical wall covering a T-shaped partition and is equipped with an entrance inspection door and a hole for introducing purified air, placed in a horizontal platform. 2. A bag filter for three-stage air purification from mechanical impurities according to claim 1, characterized in that the regeneration trolley is made in the form of a frame, which is equipped with four horizontal and four vertical half shafts with running and centering ball-bearing rollers mounted on them, the first of which are placed in running [-shaped rails mounted on the side walls of the inspection corridor of the cleaned air chamber, and the second mounted on a regeneration trolley with the formation of an adjustable transporter clearance gap between the centering rollers and the side walls of the inspection corridor of the cleaned air chamber.

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