RU2539156C1 - Bag-cartridge filter to clean air from mechanical impurities - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: filter comprises at least one module for two-stage air cleaning having at least one main dust catching chamber which includes a port in the front end wall and in the upper part is fitted by perforated panels and vertically set rail filtering hoses. The filter comprises at least one input dust settling chamber installed so that to embrace the front end wall of the main dust catching chamber, at least one input branch pipe for the supply of dirty air, a cleaned air chamber with a service door mounted on the main dust catching and input dust settling chambers, a main hopper with an unloading unit and an automatic gate in the dust outlet hole which are mounted below the input dust settling and the main dust catching chambers. The filter comprises at least one module for additional air cleaning comprising an additional dust catching chamber with filtering cartridges and additional perforated panels set in it, an additionally cleaned air chamber with a service door and at least one outlet branch pipe for additionally cleaned air, an additional hopper with an unloading unit and an automatic gate in the dust outlet hole which are mounted below the additional dust catching chamber, Venturi tubes installed in the filtering hoses and cartridges, individual regeneration systems for each section of the filtering hoses and cartridges. The filtering cartridges are installed in the additional dust catching chamber vertically in two sections along the chamber length with an interval in-between and are fixed on the additional perforated panels by a flange connection on the side of the additionally cleaned air chamber forming a maintenance passage between the flanges of the filtering cartridges of both filtering sections in the chamber on the additional perforated panels. The additional dust catching chamber is made with an input section protruding beyond the front end wall of the additionally cleaned air chamber and an expansion section placed below the filtering cartridges.

EFFECT: higher total efficiency of air cleaning and improved explosion safety of a filter.

2 cl, 2 tbl, 1 ex, 16 dwg

Description

The invention relates to the field of purification of air or gas, as well as mixtures thereof from mechanical impurities, in particular to the purification of aspiration air with a high initial dust content C _n from 4000 to 10000 mg / m ³ or more, typical for a number of industries, and return of purified air to production room.

The invention can be used in milling, textile, chemical, tobacco, woodworking and other industries in which the suction air of 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 were selected those that have an additional air purification module with filter cartridges mounted vertically from the side of the additional dust collection chambers or installed horizontally with gable visors placed above them, which makes it possible to improve them in the direction indicated in the claims of the claimed solution.

Known bag filter cartridge brand SRF10KR design LLC "ECOFILTER", published on the Internet at www.efilter.ru, dust removal module which is described in the patent for utility model RU 108127 U1 (CL F24F 13/28, published. 09/10/2011) . The filter contains at least one module with two-stage air purification, including a main dust-collecting chamber equipped with perforated panels in the upper part with nozzles lowered down and vertically arranged frame filtering sleeves fixed with upper open ends on the nozzles, a cleaned air chamber, and a main hopper with an automatic shutter in the dust outlet, located under the main dust collecting chamber, an inlet pipe for introducing contaminated air into the main a dust collection measure located in its upper part, an additional purified air module containing an additional dust collection chamber with horizontally arranged additional perforated panels and filter cartridges vertically mounted on additional perforated panels, an additional purified air chamber with an outlet pipe for additional purified air, an additional hopper with a sluice unloader in the dust outlet, located under the additional chamber dust collection, a special duct for introducing purified air from the cleaned air chamber to the additional dust collection chamber adjacent to the main dust collection chamber, dust collection level sensors installed in the main and additional bunkers, a filter bag and cartridge regeneration system with a compressed air pulse, a receiver and distributing tubes for compressed air with impulse tubes installed in the center of the outlet openings of the filter bags and cartridges.

In this case, the chambers of purified and additionally purified air are separated by a vertical partition, and the perforated panels of the main and additional dust collection chambers are located at the same level. The module has an air capacity of L = 10,000 m ³ / h. A filter of any capacity (up to 100,000 m ³ / h) is collected from the indicated dust-collecting modules.

The filter is as follows.

Contaminated air flow through the inlet pipe enters the upper part of the dust chamber. Sinking down along the filter bags, the contaminated air passes through the filter bags, is first cleaned in them, and leaves through the open ends of the bags into the cleaned air chamber, from which through a special duct adjacent to the main dust collection chamber it enters the lower part of the additional dust collection chamber, passes through filtering cartridges and leaves in the chamber of additionally purified air, from which through the outlet pipe enters the recirculation duct of the aspiration system and yes in its diffuser installed in the production area.

Dusty filter bags and cartridges are periodically (≈6 times per hour) subjected to sequential regeneration by purging them with a pulse of compressed air from a common regeneration system. Wood dust discharged during the regeneration of filter bags and cartridges is deposited in individual bins, from which it is discharged through an automatic shutter in pneumatic conveying.

The above filter analog has the following disadvantages.

1. The filter modules have a two-stage air purification (filter bags and cartridges), which does not provide a high total efficiency of air purification in the filter Е _∑ ,%.

2. Receivers for compressed air are installed in the chambers of purified air, which at a compressed air pressure of more than 4 atm forms an explosive situation in the filter and reduces its explosion safety.

3. The layout of the high-performance filter (up to L _∑ = 100000 m ³ / h) from individual dust-collecting modules with a capacity of L _i = 10000 m ³ / h increases its metal consumption.

4. The high-performance filter, composed of several dust-collecting modules, has a large number of inlet pipelines of polluted air, recirculation ducts, gate unloaders, centrifugal fans, service doors, intermediate walls, scraper conveyors and storage bins, which increases the labor costs for their manufacture.

5. The filtering sleeves and cartridges in the filter are fixed from the side of the main dust collecting chambers and additional dust collecting chambers, which causes great labor costs for their installation and replacement.

6. Each dust-collecting module of a two-stage air purification has two large service doors, made along the entire area of the side walls of the dust-collecting and additional dust-collecting chambers and equipped with sealing cords around the door perimeter, which, with several dust-collecting modules in the filter, increases the labor costs for servicing the service doors associated with replacement of sealing cords.

According to claim 1, the disadvantages of the filter analog

In the dust-collecting filter modules having a two-stage air purification, there is no inlet dust-collecting chamber, which does not provide a high total efficiency of air purification E _∑ ,%.

With air purification factors:

η ₁ = 0.5 - input dust settling chamber;

η ₂ = 0.999 - filter bags;

η ₃ = 0.9998 - filter cartridges.

The total estimated air cleaning efficiency is:

- in the filter analog

E _∑ = 100 [1- (1-η ₂ ) (1-η ₃ )] = 100 [1- (1-0,999) (1-0,9998)] = 99.9998%;

- in the claimed filter

E _∑ = 100 [1- (1-η ₁ ) (1-η ₂ ) (1-η ₃ )] = 100 [1- (1-0,5) (1-0,999) (1-0,9998) ] = 99.99999%.

According to claim 2, the disadvantages of the filter analog

Compressed air enters the filter analog receivers from the factory compressor station, in which the compressed air pressure can be in the range from 4 to 6 atm. At such pressures, a possible rupture of the receiver installed in the cleaned air chamber will cause an explosion of the air mixture in the filter.

According to claim 3, the disadvantages of the filter analog

The large metal consumption of the filter-analog, composed of several dust-collecting modules, is due to the following. With a filter capacity of, for example, L _∑ = 80,000 m ³ / h, a filter with suction and centralized dust collection systems in filling containers has:

- 8 inlet pipelines of polluted air,

- 8 recirculating air ducts with air distributors,

- 16 sluice unloaders at the outlet of the dust outlet of the bunkers,

- 8 fire retardant valves,

- 8 fire extinguishing systems,

- 8 centrifugal fans with individual starting equipment and frequency converters for electric motors,

- 8 receivers of compressed air,

- 14 intermediate walls of the main and additional dust collection chambers with a size of (3.1 × 2.4) m ² , a total area of 104 m ² and a thickness of 2 mm,

- 16 service doors with a size (2.5 × 1.2) m with sealing cords, a total length of 118 lm,

- 16 taps for connecting the exhaust pipes of the modules through the ducts to the suction pipes of centrifugal fans,

- 8 closed-chain scraper conveyors manufactured by Grain-Wood for moving trapped dust from the primary and secondary hoppers of eight modules to storage containers for centralized dust collection; two fire extinguishing systems firefly ab (Sweden), each of which serves 4 inlet pipelines of polluted air; 8 dust storage containers. The listed amount of component equipment increases the metal consumption of the filter, as well as its cost.

According to claim 4, the disadvantages of the filter analog

With an increase in the number of dust-collecting modules in the filter, the number of components increases and, as a result, the labor costs for their manufacture increase.

According to claim 5, the disadvantages of the filter analog

The large labor costs for the installation of filter bags and cartridges in the main dust collection chambers and additional dust collection chambers are due to the time spent:

- to suspend the wire frames of the filter bags on the nozzles vertically lowered downward;

- on fastening the filtering sleeves with clamps on vertically lowered pipes;

- to put on filter cartridges through openings in the bottoms on vertically fixed rods with threaded ends on the perforated panels;

- on threaded fastening of cartridges to perforated panels.

Increased labor costs for replacing a worn filter sleeve or cartridge are due to the following.

In order to replace a worn filter sleeve or cartridge located in the last row from the service door, it is necessary to dismantle all rows of sleeves and cartridges, replace a worn sleeve or cartridge, and then reinstall the sleeves and cartridges in the same places.

According to claim 6, the disadvantages of the filter analog

Suction of moist outside air through worn seals of numerous service doors of the filter-analog leads to moistening of the filter materials of the filter bags and cartridges, which causes them to become clogged with dust, deteriorate air filtration and reduce the efficiency of air purification E,%. Therefore, careful monitoring of the tightness of service doors is required, which is ensured by replacing worn cords with new ones, which causes increased labor costs for maintenance.

Known filter bag-cartridge for air purification from mechanical impurities described in the patent for invention RU 2479338 C1 (CL B01D 46/02, publ. 04/20/2013) and adopted as a prototype containing a two-stage air purification module having at least , one main dust collection chamber, equipped in the upper part with horizontal perforated panels and vertically arranged frame filter sleeves, fixed with upper open ends in the holes of the perforated panels, and located in the main dust collector two sections with a gap between them, forming in the cleaned air chamber on perforated panels a service passage between the open ends of the filter bags of both sleeve sections, at least one inlet dust settling chamber installed with a front end wall of the main dust collection chamber, which is provided with a window located opposite the gap between the hose sections, at least one inlet pipe for the input of contaminated air, the purified air chamber with a service door installed on the main dust collection and inlet dust collecting chambers, the main hopper with a unloader and an automatic shutter in the dust outlet located under the inlet dust and main dust collecting chambers, an additional air purification module containing an additional dust collection chamber with additional filtering cartridges and filter cartridges placed in it on which filter cartridges are fixed, an additional purified air chamber with a service door, at the edge at least one outlet pipe for additionally cleaned air, an additional hopper with a unloader and an automatic shutter in the dust outlet, located under the additional dust collection chamber, Venturi tubes installed in filter bags and cartridges, individual regeneration systems for each section of filter bags and cartridges, each of which includes receivers of compressed air and transfer tubes connected to them through built-in blocks of pulse valves, placed cleanly in the chambers air and additionally purified air, and equipped with impulse tubes, which are located opposite the outlet openings from the filtering sleeves and cartridges and face their internal cavity, boxes with swivel covers for accommodating compressed air receivers with built-in impulse valves, mounted on the roof of the filter .

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 consisting in increasing the total efficiency of air purification and the explosion safety of the filter, its energy efficiency and the level of technological design for the following reasons:

1. The filter does not provide high quality regeneration of filter cartridges over their entire filter surface, which causes a decrease in the total efficiency of air purification in the filter E _Σ ,% with an increase in the number of cartridge regenerations.

2. The window made in the front end wall of the main dust collection chamber and placed opposite the gap between the sections of the filter bags reduces the air cleaning efficiency E,%, leaving the inlet dust settling chamber through the window into the main dust collection chamber, which reduces the total air cleaning efficiency in the filter E _Σ ,%.

3. In the chambers of the additional dust collection of the filter during the regeneration of the filter cartridges, sections of explosive air are formed, which reduce the explosion safety of the filter.

4. Dust deposited in the inlet dust collecting chamber and falling into the main hopper is moved by a screw unloader to the automatic lock gate located behind the rear end wall of the main dust collection chamber through the entire hopper, which increases the explosion hazard of the filter.

5. The module for additional air purification has increased energy consumption for unloading captured dust, which reduces its energy efficiency.

6. An additional air purification module is installed under the purified air chamber and has a complex structure, which reduces its technological effectiveness.

According to claim 1, the disadvantages of the filter prototype

The lack of high quality regeneration of filter cartridges over their entire filter surface is due to the horizontal installation of cartridges and the placement of a gable visor above each of them, which causes, after each orderly regeneration of the cartridges, a significant amount of dust to settle in the upper zone of the corrugated recesses of the cartridges and to accumulate unremoved dust from each subsequent regeneration. Such accumulation of finely dispersed dust secondarily deposited on the upper surface of the cartridges impairs the filtration of the additionally cleaned air through the upper highly dusty area of the cartridges, which leads to an increase in its filtration rate through the less dusty filter surface of the cartridges and, as a result, reduces the total efficiency of air cleaning in the filter E, % from the calculated value of 99.99999% to the actual 99.99997%. The indicated decrease in the total efficiency of air purification E in a bag-and-cartridge filter with an increase in the number of cartridge regenerations is confirmed by the attached test report of the industrial design of the bag-and-cartridge filter, performed on the application for the grant of patent for invention No. 2011111914/05 (062733).

According to claim 2, the disadvantages of the filter prototype

When a window is made in the front end wall of the main dust collection chamber, the conditions for the deposition of dust in the input dust settling chamber from the contaminated air stream passing through the window are worsened.

As a result, the purification coefficient η ₁ in the inlet dust precipitation chamber for the specified polluted air flow may decrease from 0.5 to 0.35, which will affect the decrease in the total efficiency of air purification in the filter E _Σ ,%.

According to claim 3, the disadvantages of the filter prototype

Explosive areas of the air in the additional dust collection chambers during the regeneration of filter cartridges by a compressed air pulse form horizontally mounted filter cartridges and gable visors placed above the cartridges, which cause a significant amount of dust to settle after each regeneration of the cartridges in the upper area of the corrugated recesses of the cartridges and to accumulate non-removed dust from them each subsequent regeneration. This increases the concentration of dust in the air space located between the upper zone of the cartridges and gable visors, turning the air environment of each of these spaces into explosive. The presence of a large number of explosive areas of the air in the chambers of the additional dust collection of the filter in case of accidental discharge of static electricity in these chambers will lead to an explosion in the filter, the elimination of the consequences of which will cause significant operating costs associated with the replacement of filter cartridges, and the shutdown of technological equipment, which will lead to reduction of products.

According to claim 4, the disadvantages of the filter prototype

The discharge of dust trapped in the inlet dust collecting chamber through the rear end wall of the main hopper is associated with the transport of ≈50% of the dust contained in the polluted air through the entire hopper. During the regeneration of filter bags with a pulse of compressed air, the increased amount of dust in the hopper will be brought into suspension with the concentration of dust in the air of the main hopper C, mg / m ³ , exceeding the LEL. The coincidence of a random discharge of static electricity with the regeneration of filter bags will lead to an explosion in the hopper. The elimination of the consequences of the explosion will cause significant operating costs associated with the replacement of a set of filter bags and the shutdown of technological equipment, which will lead to a decrease in output.

According to claim 5, the disadvantages of the filter prototype

The increased energy costs for unloading trapped dust from the additional air purification module are due to the fact that each additional air purification module has two additional bunkers with unloading screw devices and automatic lock gates, which are equipped with electric drives that operate constantly.

According to claim 6, the disadvantages of the filter prototype

The complex design of the module for additional air purification and its placement under the cleaned air chamber reduces the level of manufacturability of the module design due to the increased material consumption of the module and the increased laboriousness of its manufacture, assembly and maintenance.

The increased material consumption of the module for additional air purification and the increased complexity of its manufacture are due to the presence of horizontally mounted frameless filter cartridges in it.

Frameless horizontal cartridges are 1.66 times shorter than the vertical cartridges of the inventive filter, and their number increased by 1.66 times, as well as additional supports for the bottoms of the cartridges in the form of additional cylindrical rods cantilever mounted on the side walls of the chambers. Due to the increased number of cartridges, they are located in two additional dust collection chambers having individual bins with unloading devices (screws) and automatic lock gates, and the additional purified air chamber has two vertically mounted additional perforated panels for flange mounting of cartridges. The increased number of cartridges increases 1.66 times:

- the number of flanges with mounting holes for the manufacture of cartridges;

- the number of holes in additional perforated panels and threaded holes for flange mounting of cartridges;

- the number of venturi tubes and impulse tubes for supplying compressed air;

- the total length of the transfer tubes for compressed air.

In addition, gable visors are fixed above the horizontally mounted cartridges, which protect the cartridges from dust dusting from the upper cartridges that are generated during their regeneration by a pulse of compressed air.

As a result of the installation of the module for additional air purification under the purified air chamber, the chambers of purified and additionally purified air are placed at various levels in height, requiring two external service areas for entering these chambers.

The increased laboriousness of the assembly of the module for additional air purification is caused by the difficulty of installing horizontal filter cartridges in the additional dust collection chambers with two-sided mounting (from the bottom and from the flanges). Each cartridge is installed in 5 operations:

a) on a cantilever mounted cylindrical rod with two threads (small and large diameters), on its section with a thread of small diameter, an assembly cylindrical guide with an internal thread is screwed;

b) a cartridge is inserted through the hole in the bottom of the cartridge onto the mounting cylindrical guide with the insertion of the bottom of the cartridge onto a large diameter thread of a cantilever mounted cylindrical rod;

c) the mounting cylindrical guide is screwed from the threads of the cantilever mounted cylindrical rod;

d) a nut with a washer is screwed onto the large diameter thread of the cantilever-mounted cylindrical rod until the flange of the cartridge is firmly attached to the surface of the vertically installed additional perforated panel;

e) threaded fastening of the cartridge flange with a venturi to a vertically installed additional perforated panel.

On a double-sided mounting of one cartridge, ≈T _cr = 11 min is expended. Moreover, the total fastening time of the cartridges in the filter with a capacity of L _f = 90,000 m ³ / h, having 172 cartridges, is T _Σ = n · T _f = 172 · 11 = 1892 min ≈ 32 hours.

For installation and fastening of cartridges in the filter 2 workers are required at the same time. This is due to the fact that the additionally purified air chamber from which the cartridges are installed and secured has a small width (B = 900 mm) and one service door, which, according to fire safety rules, should not be blocked by installed cartridges and a constant free exit from cameras. Therefore, all the cartridges are located at the base of the filter, and the second worker lifts them up the stairs into the chamber of additionally purified air as the mounting of the previous cartridge ends. Thus, to fix the total number of cartridges, two workers will be required during 4 work shifts, which increases the cost of mounting the filter assembly.

The increased complexity of the maintenance of filter cartridges is due to:

- the presence of exhaust openings in the bottom of the chamber of additionally purified air, which must first be covered with plywood sheets before entering the chamber, and then opened by removing the plywood sheets when leaving the chamber;

- the location of the chambers of purified and additionally purified air at various levels in height, with platforms for entering the chambers connected by an external staircase, the movement of which causes additional time costs;

- with an increase in filter capacity L _f over 45,000 m ³ / h, two filters are installed with the end walls of the input dust settling chambers adjacent to each other, which are not communicated with each other by the service door. At the same time, the entrances to the chambers of additionally purified air turn out to be at different ends of the filter, which causes additional time expenditures for the maintenance of filter cartridges located in various modules for additional air purification.

The task of increasing the competitiveness of the filter, reducing the metal consumption and labor costs for its manufacture, installation and maintenance, the implementation of which the claimed solution is aimed at, consisted in further improving the well-known design of the filter bag-cartridge for air purification from mechanical impurities, which include 100% grinding wood dust, and obtaining a technical result - increasing the total efficiency of air purification and explosion safety of the filter, its energy level of efficiency and technological design.

The achievement of the above technical result is ensured by the fact that a bag-and-cartridge filter for purifying air from mechanical impurities, comprising a two-stage air purification module having at least one main dust collecting chamber provided with perforated panels in the upper part and vertically arranged frame filtering sleeves fixed the upper open ends in the holes of the perforated panels, and located in the main dust collecting chamber in two sections with intermediate a weft between them, forming a service passage on the perforated panels between the open ends of the filter bags of both sleeve sections, at least one inlet dust settling chamber installed with the front end wall of the main dust collection chamber covering at least one inlet for entering contaminated air, purified air chamber mounted on the main dust collection and inlet dust precipitation chambers, main hopper with unloader and automatic shutter in the dust outlet, ra placed at least one additional air purification module under the inlet dust precipitation and main dust collection chambers, comprising an additional dust collection chamber with filter cartridges and additional perforated panels mounted on it, filter cartridges fixed, an additional purified air chamber with a service door and, at least one outlet pipe for additionally purified air, an additional hopper with a unloader and an automatic shutter for dust an inlet located under the additional dust collection chamber, Venturi tubes installed in filter bags and cartridges, individual regeneration systems for each section of filter bags and cartridges, each of which includes compressed air receivers and transfer tubes connected to them via built-in pulse valve units, located in chambers of cleaned and additionally cleaned air, and equipped with impulse tubes, which are located opposite the inlets of the filter bags cartridges and turned into their internal cavity, boxes with rotary covers for placement of compressed air receivers with built-in pulse valves installed on the roof of the filter. New is that the chamber for additional dust collection and the chamber for additional purified air are made over the entire width of the filter, the additional perforated panels for attaching the filter cartridges are installed horizontally, the chamber for the additional purified air is mounted on the chamber for additional dust collection with the coverage of additional perforated panels and is arranged with the service door in front end wall, filter cartridges are placed in the chamber for additional dust collection vert two sections along its length with a gap between them and mounted on additional perforated panels by flange fastening from the camera side to additionally purified air to form in the chamber on additional perforated panels a service passage between the flanges of the filter cartridges of both cartridge sections, the additional dust collection chamber is made with protruding the limits of the front end wall of the chamber of additionally purified air by the inlet section, and the expansion section, p located under the filter cartridges, while the input section of the additional dust collection chamber has an inlet window for receiving purified air, made across the entire width of the additional dust collection chamber and placed at the level of additional perforated panels, and an obliquely mounted front wall that is hermetically connected to the rear end wall by the upper end the main dust collection chamber, and the lower end to the front wall of the additional dust collection chamber with the formation of an input about the window over the entire width of the chamber, in addition to this, the dust outlet of the unloading device of the main hopper is located behind the front wall of the hopper, the cleaned air chamber is made with an outlet section that extends beyond the rear end wall of the main dust collection chamber, which is installed at the inlet section of the additional dust collection chamber with the coverage of the above the upper entrance window for receiving purified air and the front end wall of the chamber of additionally purified air, while the upper entrance window for I receiving cleaned air from the inlet chamber of the additional dust collection opposite the service door of the chamber of additional cleaned air is blocked by a service grating connecting the service passage in the cleaned air chamber with the service passage in the additional cleaned air chamber, and the exhaust pipe for additional cleaned air is placed on one of the outer vertical walls chambers of additionally purified air.

Preferably, the window in the front end wall of the main dust collection chamber is covered by a louvre grill with horizontally mounted plates that are inclined downward towards the inlet dust collection chamber.

Preferably, in the manufacture of a filter with two two-stage air purification modules and two additional air purification modules, the additional air purification modules are mounted mirror-like, and the additional dust collection chambers and the additional purified air are connected in pairs with each other through individual vertical dividing partitions, in addition to this, additional air purification devices are installed in the filter between the two-stage air purification modules, in which the dust collector is inlet The chambers are located at the edges of the filter, and the cleaned air chambers are installed with their outlet sections at the inlet sections of the additional dust collection chambers with the front end walls of the additional cleaned air chambers and the upper inlet windows for receiving the cleaned air of the inlet sections of the additional dust collection chambers with two opposite directed flows of purified air, while the vertical separation wall between the chambers of the additionally purified air the spirit is equipped with a central service door, which, together with service doors in the cleaned air chambers, service doors in the front end walls of the additional cleaned air chambers and service grating ladders, provides a through service passage along the entire length of the filter.

The proof of the materiality of the differences and the relationship of the distinguishing features with the achieved technical result is disclosed sequentially in the following order:

1. The increase in the total efficiency of air purification in the filter E,

%

2. Improving the explosion safety of the filter.

3. Improving the energy efficiency of the module for additional air purification for unloading of captured dust.

4. Increasing the level of manufacturability of the design of the module for additional air purification.

The technical result, which consists in increasing the total efficiency of air purification E,% in the filter, is provided by the following advantages of the proposed solution over the prototype.

1. The coefficient of purification of polluted air coming from the input dust settling chamber to the window located in the front end wall of the main dust collection chamber η ₁ increases from 0.35 to 0.5 due to the overlapping of the aforementioned window with a louvre grill and, as a result, the total cleaning coefficient increases air in the filter to the calculated value of E,%, with η ₁ = 0.5.

2. In the module of additionally purified air, a high quality regeneration by a pulse of compressed air of the entire filtering surface of the vertically installed cartridges is ensured, which is guaranteed to eliminate:

a) secondary settling of dust discharged from filter cartridges during regeneration by a pulse of compressed air in corrugated recesses of the cartridges;

b) the accumulation of secondarily settled dust on the filtering surface of the cartridges with an increase in the number of cartridge regenerations.

The absence of secondary settling of dust discharged from filter cartridges during regeneration by a pulse of compressed air in the corrugated recesses of the cartridges is due to the following. The purified air coming from the purified air chamber to the inlet section of the additional dust collection chamber is divided into two parts:

- one part of the purified air (≈50%) due to the inclined front wall enters the gap between the sections of the filter cartridges, into the inter-cartridge space and then into the filter cartridges;

.- the second part of the purified air is lowered into the expansion section of the chamber for additional dust collection, from which it is sent in the form of an ascending air stream in the suction mode to the filter cartridges. In this case, the upward velocity of the purified air turns out to be less than the required airflow velocity for lifting dust particles blown off the filter surface of the cartridges during their regeneration by a compressed air pulse $$\left(V_{\mathrm{at}}^{\mathrm{at}eRt}<V_{tR}^{\mathrm{at}eRt}\right)$$

.

As a result, all dust discharged from filter cartridges settles freely into an additional hopper without secondary settling on the cartridges. The absence of secondary settling of dust discharged from filter cartridges during regeneration by a compressed air pulse eliminates its accumulation with an increase in the number of cartridge regenerations. The presence of the above advantages of the proposed solution over the prototype provides the estimated total efficiency of air purification E,%, which does not depend on the presence of a window in the front end wall of the main dust collection chamber and the number of regenerations of filter cartridges.

E = 100 [1- (1-η ₁ ) (1-η ₂ ) (1-η ₃ )] = 100 [1- (1-0,5) (1-0,999) (1-0,9998)] = 99.99999%,

instead of the E value in the prototype filter equal to 99.99997%.

Distinctive features of the claimed invention provide:

1. Inlet of polluted air through a window in the front end wall of the main dust collection chamber, equipped with a louvre grille that reduces dust load on the filter bags.

2. The entrance of purified air to the chamber for additional dust collection through the upper window in the protruding section of the chamber, its free movement across all cartridges through the gap between the two sections of the cartridges and through the space between the cartridges over the entire height of the cartridges, which ensures uniform dust settling on the filter surface of the cartridges and uniform its complete deflation from the surface of the cartridges by a pulse of compressed air, because the dust is not retained in the vertical corrugated recesses of the vertically mounted cartridges and flows down them, settling in the hopper.

The technical result, which consists in increasing the explosion safety of the filter is provided:

1. By reducing the concentration of dust in the main dust collecting chamber during the regeneration of the filter bags by a pulse of compressed air, leading the dust to a suspended state, to a concentration less than the value of the LEL, due to:

- reducing the dust load on the filter bags provided by the installation of a louvre grille in the window of the front end wall of the main dust collecting chamber;

- reducing the amount of dust in the discharge device of the main hopper by placing the dust outlet of the discharge device behind the front wall of the hopper.

2. Elimination of additional dust collection in the chamber of explosive areas of the air with an increased dust concentration C, mg / m ³ , by eliminating the conditions for secondary settling of dust discharged from filter cartridges during regeneration by a compressed air pulse in the corrugated recesses of the cartridges and eliminating the accumulation of secondarily settled dust on the filtering surface of the cartridges with an increase in the number of cartridge regenerations provided by the transition from horizontally mounted cartridges over which two pitched roofs, deteriorate the quality of the regeneration upper part of the filter surface of the cartridges, the cartridges mounted to the vertically placed in two sections with a gap therebetween.

The technical result, which consists in increasing the energy efficiency of the module for additional air purification for dust unloading, is provided by the following advantages of the proposed solution over the prototype filter:

The additional air purification module has a 2-fold reduction in the number of additional dust collection chambers, additional bins, unloading screw devices and automatic lock gates, which provides a halving of the number of electric drives of unloading screw devices and automatic lock gates.

The following is a calculation of increasing the energy efficiency of the module for additional air purification of the inventive filter having a capacity of L _RCF = 90,000 m ³ / h.

Two modules of additional air purification at the specified filter performance will have:

- in the filter prototype 4 motor gearboxes for driving 4 screw unloaders with a total installed capacity of electric motors

=4·1,1=4,4 кВт и 4 мотор-редуктора для привода 4-х автоматических шлюзовых затворов с суммарной установленной мощностью электродвигателей $$N_{\Sigma y\mathrm{one}}^{wn}$$

= 4 · 1.1 = 4.4 kW and 4 gearmotors for the drive of 4 automatic locks with total installed electric motor power

=4·0,75=3 кВт. $$N_{\Sigma y\mathrm{one}}^{wl}$$

= 4 · 0.75 = 3 kW.

- in the inventive filter 2 motor gearbox for driving 2 screw unloaders with a total installed capacity of electric motors

=2·1,1=2,2 кВт и 2 мотор-редуктора для привода 2-х автоматических шлюзовых затворов с суммарной установленной мощностью электродвигателей $$N_{\Sigma y2}^{wn}$$

= 2 · 1,1 = 2,2 kW and 2 gear motors for the drive of 2 automatic gate locks with a total installed power of electric motors

=2·0,75=1,5 кВт. $$N_{\Sigma y2}^{wl}$$

= 2 · 0.75 = 1.5 kW.

In this case, the total installed capacity of electric motors of gear motors for driving dust discharge mechanisms from additional air purification modules will be:

= $$N_{\Sigma y1}^{шн}$$

+ $$N_{\Sigma y1}^{шл}$$

=4,4+3,0=7,4 кВт;- in the prototype filter $$N_{\Sigma y\mathrm{one}}^{}$$

= $$N_{\Sigma y\mathrm{one}}^{wn}$$

+ $$N_{\Sigma y\mathrm{one}}^{wl}$$

= 4.4 + 3.0 = 7.4 kW;

= $$N_{\Sigma y2}^{шн}$$

+ $$N_{\Sigma y2}^{шл}$$

=2,2+1,5=3,7 кВт.- in the claimed filter $${\mathrm{<figure-callout\; id="2"\; label="N\; \Sigma \; y"\; filenames="00000026.png,00000031.png"\; state="\{\{state\}\}">N\; </figure-callout>}}_{\Sigma y}^2$$

= $$N_{\Sigma y2}^{wn}$$

+ $$N_{\Sigma y2}^{wl}$$

= 2.2 + 1.5 = 3.7 kW.

The decrease in the installed power of the electric motors of the gearmotors of the dust discharge mechanisms from the additional air purification modules in the claimed solution will be ΔN _Σ = N _Σ1 - N _Σ2 = 7.4-3.7 = 3.7 kW.

Moreover, the increase in energy efficiency of the module for additional air purification for unloading dust in the claimed solution will be

Distinctive features of the claimed invention provided in the additional air purification module the replacement of two additional dust collection chambers with one chamber, which ensured a 2-fold reduction in the number of additional bunkers, screw unloaders and automatic gate locks having electric drives in the form of gear motors.

The technical result, which consists in increasing the level of manufacturability of the design of the module for additional air purification, is provided by the following advantages of the proposed solution over the prototype filter:

1. The additional air purification module has a 2 times reduced number of additional dust collection chambers, additional bins, unloading auger devices and automatic lock gates.

2. The additional air purification module is equipped with vertically mounted filter cartridges, which are fixed by flanges on horizontally mounted additional perforated panels and have a length increased by 1.87 times compared with horizontally mounted prototype filter cartridges, which allowed:

- reduce by 1.66 times the total number of filter cartridges, venturi tubes and impulse tubes for supplying compressed air, as well as holes in additional perforated panels for installing filter cartridges and their flange threaded fasteners;

- perform an additional dust collection chamber without gable visors and cantilever-mounted cylindrical rods with threads of small and large diameter.

3. The horizontal additional perforated panels for attaching the filter cartridges are installed on the same level as the perforated panels for attaching the filter bags, which ensured:

- when placing boxes with receivers and pulse valves on the roof of the filter, reduce by 1.66 times the total length of the transfer tubes for compressed air through the filter cartridges;

- a 2-fold reduction in the number of external service sites for entering the chambers of purified and additionally purified air.

4. In the filter of any size, a continuous service passage is formed, made at the same level, connecting the service passage in the cleaned air chamber with the service passage in the additionally cleaned air chamber, and ensuring maintenance of filter bags and cartridges without transitions along the outer staircase under a common roof with any weather conditions.

5. The chamber of additionally purified air is made over the entire width of the filter and has a large area that allows you to bring all filter cartridges in packages into the chamber and install them at workplaces (in openings of additional perforated panels) if there is only one worker.

These benefits can reduce:

- the material consumption of the module for additional air purification ≈ 25%;

- the complexity of manufacturing and assembly of the module for additional air purification ≈ 35%;

- the complexity of installation work on the installation of filter cartridges and 4 times;

- the complexity of the maintenance of filter cartridges in the filter of any size ≈ 25%.

Reducing the complexity of manufacturing and assembly of the module for additional air purification is provided by:

1. By reducing the amount of work:

- 2 times for the manufacture of additional bunkers with screw unloaders and automatic lock gates, external service sites;

- 1.66 times for the manufacture of flanges for filter cartridges, venturi tubes and impulse tubes for distributing compressed air to the cartridges, as well as holes in additional perforated panels for installing cartridges and their flange screw mounts.

2. Reduction in manufacturing:

- cantilever-mounted cylindrical rods and cutting into them threads of small and large diameters;

- gable visors and squares with threaded holes for their fastening;

- sections of the chamber additionally purified air.

3. Reducing installation and installation:

- cylindrical rods on the side walls of the chamber for additional dust collection;

- squares for attaching gable visors;

- gable visors on squares.

4. Reducing the volume of work by 1.66 times for the installation of distribution tubes for compressed air in the module of additionally purified air in connection with a decrease in their total length ≈ 1.66 times.

Distinctive features of the claimed invention provided in the module for additional air purification:

1. Replacement of two additional dust collection chambers with one chamber, which ensured a 2-fold reduction in the number of additional bunkers, screw unloaders and automatic shutters.

2. Replacement of horizontally mounted filter cartridges having a double support and gable visors above each cartridge with vertically located cartridges that are 1.87 times longer and allow:

- when reducing the outer diameter of the cartridges D _to from 360 to 325 mm

1.66 times reduce the total number of flanges for filter cartridges, venturi tubes and impulse tubes for supplying compressed air to the cartridges, as well as holes in additional perforated panels for installing filter cartridges and their flange threaded fastening:

- to eliminate gable visors with fasteners and additional supports from the bottom of the filter cartridges in the form of cantilever-mounted cylindrical rods with two threads of small and large diameter.

3. The use of two side and end walls with a ceiling overlapping the purified air chamber located above the additional air purification module of the prototype filter to form an additional purified air chamber in the inventive filter.

4. Replacement of two rows of vertically mounted additional perforated panels for attaching filter cartridges to one row of horizontal additional perforated panels made over the entire width of the filter and placed on the same level with perforated panels for attaching filter bags, which allowed:

- when placing boxes with receivers and pulse valves on the roof of the filter, reduce by 1.66 times the total length of the transfer tubes for compressed air;

- halve the number of outdoor service sites.

Reducing the complexity of installation work on the installation of filter cartridges is provided by the following advantages of the proposed solution over the prototype:

1. The chamber of additionally purified air has large dimensions in area with vertically mounted filter cartridges, which are placed in two sections with a service passage between them and a flange mount. This allows you to put in the camera all the necessary number of cartridges in the package, corresponding to the number of holes in the additional perforated panels of the camera, put them in rows on one side of the service passage, and then remove the cartridges from the package, install them in the holes of the additional perforated panels, and then carry them out flange mount together with venturi tubes and take out the packaging from the chamber.

2. The chamber of additionally purified air has an outlet pipe for additionally purified air located on the side wall of the chamber, and a service passage without holes. The absence of openings in the service passage to remove additionally purified air frees from the operation of closing them with plywood sheets for passage to the filter cartridges and removing these sheets from the chamber.

3. The vertically mounted filter cartridges have a simple flange mount.

Distinctive features of the claimed invention replace 5 operations for installing horizontal cartridges in a prototype filter for 2 operations when installing vertical cartridges (1. installing a cartridge in the hole of an additional perforated panel. 2. securing the cartridge flange together with the venturi tube with wing nuts on threaded rods installed on additional perforated panels).

Reducing the complexity of the maintenance of filter cartridges is provided by the following advantages of the proposed solution over the prototype.

1. All sizes of the inventive filter have a continuous service passage through the chambers of purified and additionally purified air, located at the same level along the entire length of the filter.

2. The additionally purified air chamber has a service corridor without openings for the release of additionally purified air, which are located on the side wall of the additionally purified air chamber.

In addition, the presence of a through service passage in the filter along its entire length frees the technical staff from moving along the external staircase to go from the cleaned air chamber to the additional cleaned air chamber and, conversely, during maintenance of filtering sleeves and cartridges, which reduces the labor costs for maintenance .

Placing the exhaust pipe for additionally cleaned air on one of the external vertical walls of the additionally cleaned air chamber provides service passage on additional perforated panels of the additionally cleaned air chamber without openings, which frees technical personnel from covering the openings with plywood sheets during maintenance of filter cartridges and, as a result , reduces maintenance effort.

The technical result of the claimed invention is provided by the totality of the essential features. The set of essential features of the proposed filter provides the following advantages over the filter prototype:

1. Reducing the dust load on the filter bags and eliminating the secondary settling of dust discharged from the filter cartridges during the regeneration by a pulse of compressed air in the corrugated recesses of the cartridges, which eliminates its accumulation on the surface of the cartridges with an increase in the number of cartridge regenerations and ensures an increase in the total efficiency of air cleaning to the calculated value E = 99.99999% compared with the value in the prototype filter, equal to E = 99.99997, regardless of the presence of a window in the front end wall of the main dust collector ivayuschey chamber and the number of regenerations of the filter cartridges.

2. Reducing the concentration of dust in the main dust collection chamber and the additional dust collection chamber during the regeneration of filter bags and cartridges with a compressed air pulse to a value lower than the NKPV value, which ensures that there is no dust explosion when the random discharge of static electricity coincides with the regeneration of filter bags or cartridges, which increases explosion safety filter.

3. A 2-fold reduction in the number of electric drives of screw unloaders and automatic lock gates in the module for additional air purification, which ensures an increase in the energy efficiency of the ΔF module for dust unloading by 50%.

4. Simplification of the design of the module for additional air purification, which ensured an increase in the level of manufacturability of the design of the module for additional air purification ≈ 25% and, as a result, reduction

- module material consumption ≈ 25%;

- the complexity of manufacturing and assembling the module ≈ 35%;

- the complexity of installation work on the installation of filter cartridges ≈ 4 times;

- the complexity of the maintenance of filter cartridges in the filter of any size ≈ 25%.

The indicated advantages of the claimed filter ensure the achievement of the claimed technical result - increasing the total efficiency of air purification and explosion safety of the filter, its energy efficiency and the level of manufacturability of the design of the module for additional air purification.

The technical result reduces the initial and operational cost of the proposed filter in comparison with the filter prototype and increases its competitiveness.

The design of the inventive bag-and-cartridge filter is illustrated by the drawings in figures 1-16.

Figure 1 presents a front view of the filter, its vertical projection; figure 2 is a section aa (figure 1); figure 3 is a section bb (figure 2); figure 4 - section CC (figure 2, 13, 15); figure 5 - section DD (figure 2, 13, 15); figure 6 is a view A (figure 1); Fig.7 is a view of B (Fig.1); in Fig.8 is a section EE (in Fig.2); figure 9 is a section FJ (figure 3); figure 10 is a section ZZ (figure 2); figure 11 - section II (figure 10); figure 12 is a section KK (figure 3); in Fig.13 is a top view of the filter with the roof removed with a unidirectional flow of cleaned air; on Fig - section LL (Fig.13); on Fig - top view of the filter with the removed roof overlap with oppositely directed counter flows of cleaned air; in Fig.16 - section MM (in Fig.15).

Figure 1-3, 7 presents views of a filter with a capacity of L _f = 20,000 m ³ / h, with a unidirectional stream of purified air. In Fig.13, 14

- types of filter with a unidirectional stream of cleaned air with a productivity of L _f = 40,000 m ³ / h, and Figures 15 and 16 are types of filter with oppositely directed flows of cleaned air with a capacity of L _f = 40,000 m ³ / h.

Figure 3, 4, 5, 7, 14, 16 conditionally not shown fencing on the roof of the filter.

In figure 1, 2, 3, 4, 5, 6, 7, 13, 14, 15, 16, the arrows indicate:

- загрязненный воздух;

- contaminated air;

- дополнительно очищенный воздух;

- additionally purified air;

- уловленные механические примеси.

- captured mechanical impurities.

The filter (Fig. 3) contains a two-stage air purification module 1, having at least one inlet dust settling chamber for introducing polluted air 2 with an inlet branch 3, at least one main dust collection chamber 4, provided with horizontal perforated panels in the upper part 5, and vertically arranged filtering sleeves 6, fixed with upper open ends on perforated panels 5 using double spring rings 7, sewn into the cuffs of filtering sleeves 6, and containing composite steel wire frames 8 with Venturi tubes 9 for supplying compressed air pulses to them (Fig. 8), a purified air chamber 10 mounted on the main dust collecting 4 and inlet dust settling 2 chambers (Fig. 3). The filter also contains a module for additional air purification 12, containing an additional dust collection chamber 13 and an additional purified air chamber 14 with an outlet pipe for additionally purified air 15 (Fig. 3).

The filter bags 6 (Fig. 4) are placed in the main dust collection chamber 4 by two bag sections 16 with an interval between them 17, which forms a service passage 18 (figure 2) in the chamber of purified air 10 on the perforated panels 5 (Fig. 2) for servicing the filter bags.

Under the inlet dust precipitation 2 chamber and the main dust collection chamber 4 (Fig. 3), a main hopper 19 is installed, comprising a discharge device 20, a gate 21, located in the dust outlet 22 and an automatic (lock) gate 23 installed under the gate 21.

The main dust collection chamber 4 has a front 24 and a rear 25 end walls (figure 3).

The input dust-settling chamber for introducing polluted air 2 (Fig. 3) is connected to the front end wall 24 of the main dust-collecting chamber 4 with its coverage.

In the front end wall 24 (Fig. 3), a window 26 (Fig. 4) is made for an additional outlet of contaminated air from the inlet dust chamber 2 with dimensions having a height equal to the length of the filtering sleeves 6 and a width equal to the width of the gap 17 between the sleeve sections 16 .

In the window 26, a louvre grille 27 (FIG. 3) is installed with horizontal plates 28 (FIG. 4) having an inclination downward towards the inlet dust chamber 2 (FIG. 3).

An additional dust collection chamber 13 and an additional purified air chamber 14 are made over the entire width of the filter (Fig. 5).

The additional air purification module 12 (Fig. 3) contains filter cartridges 29 with Venturi tubes 30 (Fig. 8), mounted on additional perforated panels 31, which are installed in the chambers of the additional purified air 14 (Fig. 5).

An additional purified air chamber 14 is mounted on an additional dust collection chamber 13 with coverage of additional perforated panels 31 and placement of a service door 33 in its front end wall 32 (Fig. 3).

The filter cartridges 29 are placed in the chamber for additional dust collection 13 (Fig. 5) vertically by two sections 34 along its length with a gap of 35 between them and mounted on additional perforated panels 31 by means of flange fastening from the chamber side to further purified air 14 with the formation of additional perforated ones in it panels 31 of the service passage 36 between the flanges 37 of the filter cartridges 29 of both cartridge sections 34.

The chamber for additional dust collection 13 (Fig. 3) is made with an inlet section 38 that extends beyond the front end wall 32 of the chamber of additionally purified air 14 and has an upper entrance window for receiving purified air 39, located at the level of additional perforated panels 31, and an inclined front a wall 40, which the upper end is hermetically connected to the rear end wall 25 of the main dust collection chamber 4, and the lower end to the front wall 89 of the additional dust collection chamber 13 with an image aniem therein an input window 81 for the purified air throughout the area of its vertical cross section (Figure 3). In addition, the purified air chamber 10 is made with an output section 46 (Fig. 3) protruding beyond the rear end wall 25 of the main dust collection chamber 4, which is installed at the input section 38 of the additional dust collection chamber 13 with a coverage of the upper entrance window for receiving purified air 39 and the front end wall 32 of the chamber of additionally purified air 14, and the upper entrance window 39 (FIG. 2) of the inlet section 38 (FIG. 3) of the additional dust collection chamber 13 opposite the service door 33 (FIG. 2) of the additional chamber but the cleaned air 14 is blocked by a service grating ladder 48 (FIG. 2) connecting the service passage 18 in the cleaned air chamber 10 (FIG. 4) with the service passage 36 (FIG. 2) in the chamber of additionally purified air 14 (FIG. 5).

In the manufacture of a filter with two modules of two-stage air purification 1 and two modules of additional air purification 12, the modules of additional air purification 12 (Fig. 16) are mounted mirror-like, and the cameras for additional dust collection 13 and additional purified air 14 are connected in pairs with each other adjoining each other through individual vertical dividing walls 49 and 50.

In addition, the additional air purification modules 12 are installed in the filter between the two-stage air purification modules 1, in which the inlet dust settling chambers 2 are located at the edges of the filter, and the cleaned air chambers 10 are installed with their outlet sections 46 at the inlet sections 38 of the additional dust collection chambers 13 with frontal the walls 32 of the chambers of additionally purified air 14 and the upper inlet windows 39 of the inlet sections 38 of the additional dust collection chambers 13 with the provision of two opposite directed flows of purified air. The vertical separation wall 50 between the chambers of additionally purified air 14 is equipped with a central service door 51, which, together with service doors 11 in the front end walls of the cleaned air chambers 10, service doors 33 in the front end walls 32 of the additional purified air chambers 14 and service grating ladders 48 (Fig. 15) a through service passage along the entire length of the filter.

Section 16 of the filter bags 6 (Fig. 4) is equipped with individual compressed air regeneration systems 52, each of which contains a compressed air receiver 54, pulse valves 56 integrated into the compressed air receiver, transit tubes 67 and flexible tubes 69 for supplying compressed air to filter sleeves 6, horizontally located distribution tubes 58 of compressed air through the filter sleeves 6 through impulse tubes 60 and clamps 84 for mounting the transfer tubes 58 mounted on perforated panels 5. Compressed-air receivers the air 54 are placed in the box 62 with hinged lids 82 (figure 4). Boxes 62 with receivers 54 are mounted on the roof ceiling 64 of the cleaned air chamber 10, and the receivers 54 are connected to the compressed air supply line 75 (FIG. 3). The hinged lid 82 (Fig. 9) is connected to the casing 62 by means of a piano loop (not indicated in the drawings), a strip of sheet rubber is glued on the hinge of the seal for sealing purposes (not indicated in the drawings).

When the housing of the receiver of compressed air 54 ruptured, the compressed air in the receiver discards the hinged rotary cover 82, which ensures its unhindered discharge into the atmosphere.

The transit tubes 67 (Fig. 9) for supplying compressed air to the filtering sleeves 6 are connected to the fittings 65 of the pulse valves 56 of the receivers 54. The flexible tubes 69 (Fig. 4) are designed to divert the transfer tubes 58 to the side of the row of filtering sleeves 6, in which It is planned to replace any worn sleeve with a new filter sleeve.

Section 34 of the filter cartridges 29 (Fig. 5) are equipped with individual regeneration systems 53, each of which contains a compressed air receiver 55 (Fig. 12), pulse valves 57 integrated into the compressed air receiver, transit tubes 68 (Fig. 5) and flexible tubes 70 for supplying compressed air to the filter cartridges 29, transfer tubes of compressed air 59 through the filter cartridges 29 through impulse tubes 61 and clamps 85 for attaching the transfer tubes mounted on additional perforated panels 31. Compressed air receivers 55 (Fig. 12) still in boxes 63 with hinged lids 83. Boxes 63 (Fig. 12) with receivers 55 are installed on the roof ceiling 90 of the additionally purified air chamber 14 (Fig. 5), and receivers 55 (Fig. 3) are connected to the compressed air supply line 75 The transit tubes 68 (Fig. 12) for supplying compressed air to the filter cartridges 29 are connected to the fittings 66 of the pulse valves 57 of the receivers 55.

The main dust collection chamber 4 and the secondary dust collection chamber 13 are provided with safety doors 71 and 72 (FIG. 1). The chamber of purified 10 (Fig. 3) and additionally purified air 14, as well as the main hopper 19 and the additional hopper 41 are equipped with service doors 11, 33, 79, and 88, respectively. Entrance to the chambers of purified 10 and additionally purified 14 air is provided from an external platform 76 (figure 3). For the safety of servicing pulse valves 56, 57 on the roof ceilings 64 and 90 of the chambers of cleaned 10 and additionally cleaned 14 air, external barriers with rails 74 are installed (Fig. 1).

Unloading of captured dust by filtering sleeves 6 and cartridges 29 from the main 19 and additional 41 bins (FIGS. 3, 16) is carried out by unloading devices 20, 42 through the automatic lock gates 23 and 45 (FIG. 3) into the closed-type chain conveyor conveyor 77 manufactured by “ Greene Wood. "

The filter housing can be made in two versions:

- from panels with a width of 575 mm, transported in a container and assembled into the product using fastening bolts at the installation site of the filter;

- from welded sections manufactured at the manufacturer, transported by road to the installation site.

When the customer's location of the filter at a large distance from the manufacturer of the filter, the latter is made from prefabricated panels 575 mm wide, and when the customer is located at a short distance - from welded sections.

The additional air purification module is installed:

- in the manufacture of welded sections adjacent to the rear end wall 25 of the main dust collection chamber 4 (figure 3), while the wall 25 is common (dividing);

- in the manufacture of prefabricated panels with a width of B = 575 mm with a gap between the end wall of the module and the rear end wall 25 of the main dust collection chamber 4, equal to B _prom = 2 × 575 = 1150 mm (not shown in the drawings).

Each welded section of filter bags and cartridges has a capacity of 10,000 m ³ / h. Of these, a filter can be arranged with a capacity of L _f from 20,000 to 100,000 m ³ / h.

The filter made of welded sections, depending on its performance L _f , m ³ / h, can be made in two versions:

- modification 1 is performed with a unidirectional stream of purified air into the module for additional air purification 12 (Fig.2, 3 and 13, 14);

- modification 2 is performed with bi-directional counter flows of purified air into the modules for additional air purification 12 installed in the center of the filter (Fig. 15, 16).

The filter depending on the modification has a different number of service sites 86 with electrical cabinets 78:

- at modification 1 - one service platform 86;

- at modification 2 - two service sites 86.

The service platform 86 allows you to place a number of spare filter bags 6 on the side of the entrance service door 11 into the cleaned air chamber 10, and on the other side of the door 11 to configure a controller (not shown in the drawings) located in the control cabinet 78 and controlling individual regeneration systems 52, 53 filter bags 6 and cartridges 29.

In the two-stage air purification module 1, in the presence of two main dust collection chambers 4 and two inlet dust precipitation chambers 2, there is one service area 87 located in the cleaned air chamber 10 above the second inlet dust precipitation chamber 2 from the service door 11. The service platform 87 allows you to place filter bags 6 before putting them on composite frames 8 and installing in the main dust collection chambers 4.

Modification 1 of the filter, depending on the performance L _f , m ³ / h, (20,000 ÷ 50,000) can be combined with a different number of input dust settling chambers 2:

- a filter with a capacity of L _f from 20,000 to 30,000 m ³ / h (Figs. 2, 3) has one inlet dust settling chamber 2;

- a filter with a productivity of L _f from 40,000 to 50,000 m ³ / h (Figs. 13, 14) has two dust collection chambers 2.

Modification 2 of the filter depending on the capacity L _f , m ³ / h (40000 ÷ 100000) can be combined with the number of input dust-settling chambers 2 from two to four:

- a filter with a capacity of L _f from 40,000 to 60,000 m ³ / h (Fig. 15, 16) has two input dust settling chambers 2:

- the filter with a capacity of L _f from 70,000 to 100,000 m ³ / h has four input dust settling chambers 2.

The filter, made according to modification 2 (Fig. 15, 16), has two scraper chain conveyors 77 with oppositely directed transport of material into two containers and vertical separation walls 49, 50 between the additional air purification modules 12, which allows you to turn off the fans of any half of the filter and replace the filter bags and cartridges in it.

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

- filter grounding;

- prevention of dust accumulation in filter hoppers;

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

- fire retention in the event of a fire in the filter to prevent fire from entering the air distributor installed in the workshop and transport 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 sections 16 (figure 4) of the filter bags 6 and sections 34 (figure 5) of the filter cartridges 29 are in the filtering mode.

2. Regular regeneration of the filter bags 6 is carried out, in each bag section 16 (Fig. 3) by supplying a pulse of compressed air from pulse valves 56 integrated into the receivers 54 of the sections 16, filter bags 6 through transit 67, flexible 69, transfer 58 and pulse 60 tubes (figure 4).

3. Regular regeneration of filter cartridges 29 is carried out, located in each additional dust collection chamber 1 (Fig. 5) by applying a pulse of compressed air from pulse valves 57 integrated into receivers 55 of sections 34 of filter cartridges 29 through transit 68 flexible 70 horizontally mounted transfer 59 and pulse 61 tubes.

Modes 1, 2 and 3 are carried out with round-the-clock air purification, i.e. with working technological equipment. After the filter is brought to the equilibrium dusty state of the filter cloths of the filtering sleeves 6 and cartridges 29, the filter is turned on for continuous round-the-clock air purification.

This includes:

- time relay (not indicated in the drawings) for the implementation of air filtration by filtering sleeves 6;

- a timer for limiting the time of the dust accumulation cycle in sections 34 of the filter cartridges 29 (not indicated in the drawings).

Sequential sequential regeneration of the filtering sleeves 6 and cartridges 29 is carried out by the control controller (not indicated in the drawings).

The filter in the filtering mode (figure 3) works as follows. Contaminated air containing explosive dust and to be cleaned from the inlet pipes 3 enters the upper part of the inlet chamber 2, which performs the function of a dust precipitation chamber. The polluted air in chamber 2 is divided into 2 streams:

- part of the contaminated air (≈35%) enters the window 26 (figure 4), from which through the louvre grille 27 is sent to the gap 17 between the sections 16 of the filter bags 6 and distributed over their entire height;

- the rest of the polluted air (≈65%) goes down and enters the main hopper 19 and then into the main dust collection chamber 4, in which vertically mounted frame sleeves 6 with an external working surface are placed.

When this dust particles larger than 150 microns are separated from the air in the inlet chamber 2 and fall in the main hopper 19 of the filter. Air dusted with small particles with sizes less than 150 microns enters the area of the filter bags 6. At the same time, the contaminated air passes through the fabric of the filter bags throughout their height, is cleaned in them and enters through the open part of the bags 6 into the cleaned air chamber 10.

Since the filtering sleeves 6 are made of glazed polyester, which does not hold the dust layer on its working surface, the dust flows from the working surface of the sleeves 6 and is deposited in the main hopper 19, from which it is removed by the discharge device 20 (screw conveyor) through the dust outlet 22 and the lock a shutter 23 into a closed-type scraper chain conveyor 77 that transfers dust to a storage container (not indicated in the drawings). A small part of the dust remains inside the filter fabric of the sleeves 6.

In the filtration mode, the pulse valves 56 built into the compressed air receivers 54 sections 16 of the filter bags 6 are closed.

Purified in sections 16 of the filtering sleeves 6, the air (figure 4), containing particles smaller than 10 microns, from the chamber 10 enters the inlet section 38 of the chamber for additional dust collection 13 (figure 3), in which due to the obliquely mounted front wall 40 is divided into two streams (upper and lower), which through the vertical input window 81 enter the chamber for additional dust collection 13:

- the upper stream of purified air (≈50%) enters the gap 35 between the sections 34 of the filter cartridges 29, into the inter-cartridge space and then into the filter cartridges 29;

- the second, lower stream of purified air is lowered into the expansion section 80 of the chamber for additional dust collection 13, in which it is formed into an upward air stream of purified air directed in the suction mode to the filter cartridges 29.

In the additional dust collection chamber 13, the cleaned air passes through sections 34 of the filter cartridges 29, in which it is additionally cleaned and exits to the additionally cleaned air chamber 14. From the chamber 14, the additionally cleaned air through the exhaust pipe 15 and the duct connected to the suction port of the centrifugal fan is supplied by a fan through a recirculation duct to an air distributor installed in the workshop (not shown in the drawings).

The filtering sleeves 6 of the main dust collection chamber 4 will be in the filtering mode, the estimated time controlled by the time relay, after which the regeneration mode of the sleeves 6 is started. The duration of the filtering mode, characterizing the length of the interval between regeneration periods, depends on the value of the initial concentration of wood dust C _n , mg / m ³ in the pipes of polluted air 3 and is installed on a time relay. For workshops of white grinding C _n = 3000 mg / m ³ , and for workshops of grinding plywood C _n = 6950 mg / m ³ .

The second mode of regeneration of filter bags (cleaning the critically dusted fabric of the bags from dust to an equilibrium dust state) is carried out by sequentially purging the rows of filter bags 6 with a pulse of compressed air at the beginning of one section 16 and then another section 16 of the filter bags 6 of the main dust collection chamber 4. Regeneration of filter bags 6 starts after the time relay is triggered and is carried out through the controller (not shown in the drawings), which controls the pulse switching sequence valves 56. The dust blown from the filter bags 6 is poured into the main hopper 19, from which the discharge device 20 is removed through the dust outlet 22 and the lock gate 23 into a closed chain scraper conveyor 77. After the regeneration of both sections 16 of the filter bags 6 is completed, the control controller turns on the relay time for filtering mode.

Alternately purging the filter bags 6 first of one bag section 16 through the pulse valves 56 and then the other bag section reduces the air load on the filter bags in the regeneration mode, reduces the energy consumption for air cleaning and increases the cleaning efficiency E,%, in the bags by reducing the filtration rate V _f , m / s.

The third mode of regeneration of the sections 34 of the filter cartridges 29 with a pulse of compressed air can be illustrated by the example of Fig.5. The operation of the regeneration system of the sections of the filter cartridges 29 begins when the timer limits the time of the dust accumulation cycle on the filter cartridges 29 and is reduced to the sequential regeneration of the rows of filter cartridges 29 located in the chamber for additional dust collection 13. The dust blown from the filter cartridges 29 by pulses of compressed air settles in additional bins 41 and is removed from them by additional unloading devices 42 (screw conveyors) through the outlet openings 44 and lock gates 43 closed chain scraper conveyor 77.

Shown in Fig.1-12 filter bag-cartridge for air purification from mechanical impurities has a capacity L _f = 20,000 m ³ / h and is made of welded sections with a capacity L _c = 10,000 m ³ / h

The following data were taken as initial data for calculating the parameters of the welded sections of the indicated productivity: the inner diameter of the filter bag d _int = 150 mm, the thickness of the filter cloth S _tk = 2 mm, the length of the filter bag l _p = 2.82 m, the filtration speed in the sleeves in the filtration mode V _f = 2 m / min. The number of hoses in the blown row n _p = 10, the number of hoses blown through one receiver 54 n _p = 5. The number of hoses in one sleeve section transported by motor vehicles with a capacity of L _s = 10000 m ³ / h n _pc = 60 hoses.

In the module for additional air purification, filter cartridges are used with an outer diameter d _kn = 0.325 m, a length l _k = 1.5 m, a corrugation pitch t _g = 11 mm, a corrugation height h _g = 50 mm, and a filter surface area F _k = 13, 8 m ² having a filtration rate V _f = 1 m / min productivity L _to = 832.8 m ³ / h = 13.88 m ³ / min The number of filter cartridges in the horizontal row of the cartridge section is n _qvr = 3. Performance blown horizontal row of filter cartridges L _ave = n · L _{CWR k} = 3 * 832.8 = 2498.4 m ³ / h.

The number of cartridges in one welded section of an additional air purification module with a capacity of L _c = 10000 m ³ / h, n _ks = 10000/833 = 12 cartridges.

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

1. The filtering area of one filter sleeve with a bottom

. $$F_{pi}=\pi \cdot d_n\cdot l_R+0,785d_{dn\mathrm{about}}^2=3,\mathrm{fourteen}\cdot 0,154\cdot 2,82+0,785\cdot 0,{146}^2=\mathrm{one},3804{\mathrm{<figure-callout\; id="2"\; label="m"\; filenames="00000026.png,00000031.png"\; state="\{\{state\}\}">m</figure-callout>}}^2$$

.

2. The filtering area of one section of the sleeves with a capacity of L _s = 10000 m ³ / h

F _cp = n _cf. F _pi = 60 · 1.3804 = 82.82 m ² .

3. The filtering area of one row of sleeves

F _row = 10 F _pi = 10 · 1,3804 = 13,804 m ² .

4. Actual air flow at L _f = 2 m / min:

- one row of filter bags

L _row = F _row · V _f = 13,804 · 2,0 = 27,608 m ³ / min = 1656,48 m ³ / h;

- one section with a capacity of L _s = 10000 m ³ / h

L _c = F _cp · V _f = 82.82 · 2.0 = 165.64 m ³ / min = 9938 m ³ / h.

5. The number of rows of filter bags in the filter with a capacity of L _f = 20,000 m ³ / h

n _row = L _f / L _row = 20,000 / 1,656.48 = 12.07 rows.

Accepted n _row = 12.

6. The number of sleeves in the filter

n _p = n p. _row · n _row = 10 · 12 = 120 sleeves.

7. The length of the main dust collection chamber with a productivity of L _f = 20,000 m ³ / h

l _okp = 2l _s6 = 2 · 1350 = 2700 mm,

where l _c6 is the length of the section with six rows of filter bags, mm

8. Width of filter and module for additional air purification

B _f = 5 · 575 = 2875 mm.

9. Width of the chamber for additional dust collection

B _KDP = 5 · 575 = 2875 mm.

10. The width of the chamber additionally purified air

B _cd = B _cdp = 2875 mm.

11. The length of the module for additional air purification with a capacity of L _mod = 20,000 m ³ / h:

l _mod = 2l _{s (10000)} + 500 = 2 · 1000 + 500 = 2500 mm, where l _{s (10000)} is the length of the section of the module for additional air purification with a capacity of L _s = 10000 m ³ / h, mm.

12. The length of the input dust chamber

l _pc = 2 · 575 = 1150 mm.

13. The total length of the filter with a capacity of L _f = 20,000 m ³ / h

l _fΣ = l _pc + l _opk + l _mod = 1150 + 2700 + 2500 = 6350 mm.

The filter has electrical locks, according to which:

- during the regeneration of the filtering sleeves 6 cannot be started regeneration of the filtering cartridges 29;

- after regeneration of the next row of vertically installed filter cartridges, the regeneration of the next row of cartridges can begin only after dust is deposited in the hopper from the previous row of filter cartridges, the time of which is controlled by a time relay.

The time limit for the dust accumulation cycle T _PNK , h, in the filter cartridge sections, set on the timer, depends on the dust accumulation M _p , kg, in the rows of vertically installed filter cartridges and is determined from the explosion safety conditions for an orderly blowing of the cartridges

where [C _p ] is the permissible concentration of dust in polluted air obtained after pulsed purge, mg / m ³ ; [M _p ] is the mass of dust accumulated by the NKPV in a row of vertically mounted filter cartridges, kg. A row consists of 3 cartridges; V _to is the critical volume of air in which, after pulsed purging of a number of filter cartridges, the highest concentration of dust takes place, m ³ , is determined from expression (3); NKPV - lower concentration limit of explosiveness for wood dust, g / m ³ , NKPV = 12.6 - for wood flour; K _s - safety factor for preventing the explosion of the dusty air mixture during the regeneration of the vertical row of cartridges with a probable spark breakthrough, K _s = 1.2 ÷ 1.5.

From (1)

where L _p - air flow in one row of vertically mounted filter cartridges, m ³ / h

where L _c = 10000 - the performance of the filter section, m ³ / h; n _p - the number of rows of vertically mounted filter cartridges in the section of the module additional cleaning; T _to - the critical settling time of dust discharged during the regeneration of a number of vertically mounted cartridges in the oncoming vertical air flow, sec.

After substituting (3) in (2) we obtain

The dust accumulation time in the row of vertically mounted cartridges T _PNA , s, is determined from the expression

where M _p - the mass of dust deposited in a row of vertically mounted cartridges as a result of filtering the flow of purified air, kg / h

where C _nk - the initial concentration of dust at the entrance to a number of vertically mounted filter cartridges, mg / m ³ , C _nk = 3; C _kk - final dust concentration at the outlet of the module for additional air purification, mg / m ³ , C _kk = 0.05.

After substituting (5) and (7) in (6), we finally obtain the formula for determining the dust accumulation time in a row of vertically mounted cartridges

Considering that the dust deposited on the filter cartridges as a result of filtering the stream of purified air is finely dispersed, formed as a result of its slip through the filter bags, then determine the settling time of dust T _k , discharged during the regeneration of a number of filter cartridges, in the ascending stream of purified air by calculation does not seem possible. The time T _k depends on the size of the air gaps between the filter cartridges and the speed of the upward air flow in the inter-cartridge space and is determined experimentally.

If we take the time of dust sedimentation in an additional hopper T _k = 4 s, then the approximate dust accumulation time T _PCA , h, on filter cartridges at K _s = 1.3; C _nk = 3 mg / m ³ ; C _kk = 0.001 mg / m ³ will be

In the table. 1 shows the parameters of the line of bag-and-cartridge filters of various capacities, and in table. 2 parameters L _f , F _f , V _f in the filtering modes of the sleeves and cartridges.

Table 1 Modification L _f , m ³ / h (m ³ / min) Filter bags
n _pcb = 60 Filter cartridges
n _swr = 12 Input camera Camera main dust collection Add-on module cleaning Length mm n _St. n _pΣ n _St. n to _Σ n _in n _p n _mod The main dust collection chambers Extra Cleaning Modules Input cameras Filter one 20000 2 120 2 24 one one one 2700 2500 1150 6350 30000 3 180 3 36 one one one 4050 3500 1150 8700 40,000 four 240 four 48 2 2 one 5400 4500 2300 12200 50,000 5 300 5 60 2 2 one 6750 5500 2300 14550 2 40,000 four 240 four 48 2 2 2 5400 5000 2300 12700 50,000 5 300 5 60 2 2 2 6750 6000 2300 15050 60,000 6 360 6 72 2 2 2 8100 7000 2300 17400 70,000 7 420 7 84 four four 2 9450 8000 4600 22050 80,000 8 480 8 96 four four 2 10800 9000 4600 24,400 90,000 9 540 9 108 four four 2 12150 10,000 4600 26750 100,000 10 600 10 120 four four 2 13500 11000 4600 29100

table 2 Filter parameters L _f , F _f , V _f in the filtering modes of the sleeves and cartridges Filter index Filtering modes Sleeveless Cartridges L _f , m ³ / h (m ³ / min) F _fΣ , m ² V _f (m / min) L _f , m ³ / h (m ³ / min) F _fΣ , m ² V _f (m / min) SRF-1-20000-120-24-I-A-VZ-N 20,000 (333.3) 165.6 2.0 20,000 (333.3) 331.2 1,0 SRF-1-30000-180-36-I-A-VZ-N 30000 (500) 248.5 2.0 30000 (500) 496.8 1,0 SRF-1-40000-240-48-I-A-VZ-N 40,000 (666.6) 331.3 2.0 40,000 (666.6) 662.4 1,0 SRF-1-50000-300-60-I-A-VZ-N 50,000 (833.3) 414.1 2.0 50,000 (833.3) 828 1,0 SRF-2-40000-240-48-I-A-VZ-N 40,000 (666.6) 331.3 2.0 40,000 (666.6) 662.4 1,0 SRF-2-50000-300-60-I-A-VZ-N 50,000 (833.3) 414.1 2.0 50,000 (833.3) 828 1,0 SRF-2-60000-360-72-I-A-VZ-N 60,000 (1,000) 469.9 2.0 60,000 (1,000) 993.6 1,0 SRF-2-70000-420-84-I-A-VZ-N 70,000 (1,166.6) 579.8 2.0 70,000 (1,166.6) 1159.2 1,0 SRF-2-80000-480-96-I-A-VZ-N 80,000 (1,333.3) 662.6 2.0 80,000 (1,333.3) 1324.8 1,0 SRF-2-90000-540-108-I-A-VZ-N 90,000 (1,500) 745.4 2.0 90,000 (1,500) 1490.4 1,0 SRF-2-100000-600-120-I-A-VZ-N 100,000 (1,666.6) 828.2 2.0 100,000 (1,666.6) 1656 1,0

An example of designation of a filter of modification 1 with a capacity of L _f = 50,000 m ³ / h SRF-1-50000-300-60-I-A-VZ-N.

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.

Sequence listing

1. The two-stage air purification module (Fig.3, 14, 16)

2. The input dust chamber for entering contaminated air (Fig.1, 3, 14, 16)

3. The inlet pipe (Fig.1-7, 13, 14, 15, 16)

4. The main chamber of the dust collection (figure 1, 3, 4, 16)

5. Perforated panels for attaching filter bags (Fig. 3, 4, 14, 16)

6. The filtering sleeve (figure 4, 8)

7. Double snap rings (Fig. 8)

8. Composite steel wire frames (Fig. 8)

9. Venturi tubes in wire frames of filter bags (Fig. 8)

10. The chamber of purified air (Fig.1, 3, 4, 14, 16)

11. Service door of the purified air chamber (Fig. 1, 2, 3, 4, 6, 7, 13, 14, 15, 16)

12. Module for additional air purification (figures 1, 3, 14, 16)

13. The camera additional dust collection (figure 1, 3, 5, 14, 16)

14. The camera is additionally purified air (figures 1, 3, 5, 14, 16)

15. The exhaust pipe for additionally purified air (figure 1, 2, 3, 5, 6, 7, 13, 14, 15, 16)

16. Section of the filtering sleeves (figure 2, 3, 4, 13, 14, 16)

17. The gap between the sections of the filter bags (figure 4)

18. Service pass in the chamber of purified air on perforated panels (Fig.2, 13, 15)

19. The main hopper (figures 1, 3, 4, 6, 14, 16)

20. Unloading device (figures 1, 3, 4, 6, 14, 16)

21. Gate (Fig. 1, 3, 14)

22. Dust outlet (figure 3)

23. Automatic (gateway) shutter (figures 1, 4, 10, 14, 16)

24. The front end wall of the main chamber of the dust collection (figure 3, 16)

25. The rear end wall of the main chamber of the dust collection (figure 1, 3)

26. A window in the front end wall of the main dust collection chamber (FIG. 4)

27. The louvre grille (Fig.3, 14, 16)

28. The horizontal plate of the louvre grille (figure 4)

29. Filter cartridges (figure 3, 5, 10, 16)

30. Venturi tubes installed in filter cartridges (figure 10)

31. Additional perforated panels (figure 3, 5)

32. The front end wall of the chamber additionally purified air (Fig.3, 16)

33. Service door in the front end wall of the chamber of additionally purified air (Fig.2, 3, 5, 13, 16)

34. Section of the filter cartridges (figure 2, 5, 13, 14)

35. The gap between the sections of the filter cartridges (figure 5)

36. Service passage in the chamber of additionally purified air (Fig.2, 5, 13, 16)

37. Flanges of filter cartridges (figure 5)

38. The inlet section of the chamber additional dust collection, protruding beyond the front end wall of the chamber additionally purified air (Fig.1, 16)

39. The upper entrance window for receiving purified air (Fig.2, 13, 15)

40. Inclined front end wall of the protruding portion of the chamber for additional dust collection (figure 3)

41. Additional hopper (figures 1, 3, 5, 14, 16)

42. Unloading device (figures 1, 3, 5, 14, 16)

43. The gate in the dust outlet (Fig.1, 3, 14)

44. Dust outlet (figure 3)

45. Airlock shutter additional dust collection (Fig.1, 3, 5, 14, 16)

46. The output section of the chamber of purified air (Fig.1, 3, 16)

47. The rear end wall of the additional dust collection chamber (figure 3)

48. Service trellis ladder (Fig.2, 13, 15)

49. The vertical partition dividing the chambers of additional dust collection (Fig.16)

50. The vertical separation wall between the chambers of additionally purified air (Fig.16)

51. Central service door in the dividing wall between the chambers of additionally purified air (Fig. 15, 16)

52. Individual systems of regeneration by a pulse of compressed air sections of the filter bags (figure 4)

53. Individual systems of regeneration by a pulse of compressed air sections of filter cartridges (figure 5)

54. Receivers of compressed air individual regeneration systems of filter bags (Fig.4, 9)

55. Receivers of compressed air individual regeneration systems of filter cartridges (Fig.5, 12)

56. The pulse valves of the receivers of the filter bags (Fig.4, 9, 14)

57. The pulse valves of the receivers of filter cartridges (Fig.5, 12, 14)

58. Distribution tubes of compressed air along the filtering sleeves (figure 4)

59. Distribution tubes of compressed air through the filter cartridges (figure 5)

60. Impulse tubes for the distribution of compressed air through the filtering sleeves (figure 4)

61. Pulsed tubes for the distribution of compressed air through the filter cartridges (figure 5)

62. Boxes for receivers of filtering sleeves (figures 1, 4)

63. Boxes for receivers of filter cartridges (figures 1, 5)

64. Roof ceilings of the purified air chamber (figure 4)

65. The union of the receivers of compressed air filter bags (Fig.4, 9)

66. The union of the receivers of compressed air filter cartridges (Fig.5. 12)

67. Transit tubes for compressed air regeneration system of the filter bags (figure 2, 3, 4, 14, 16)

68. Transit tubes for compressed air regeneration system of filter cartridges (Fig.2, 3, 5, 14, 16)

69. Flexible tubes regeneration system of filter bags (figure 4)

70. Flexible tubes regeneration system of filter cartridges (figure 5)

71. Security doors of the main dust collection chamber (FIG. 1)

72. Security doors of the chamber for additional dust collection (figure 1)

73. Protections inside the chamber of the purified air (figure 2)

74. External fencing on the roof of the chambers of purified and additionally purified air (figure 1)

75. Line for supplying compressed air (Fig.1-14)

76. An outdoor area for entering the purified air chamber (Fig. 1, 2, 3, 13, 16)

77. Scraper chain conveyor closed type production Greynvud (Fig.1, 3, 16)

78. Electrical cabinet (Fig. 2, 3, 4, 13, 14, 15, 16)

79. Service hatch of the main hopper (figures 1, 3, 14, 16)

80. The expansion section of the chamber for additional dust collection (figure 3)

81. The entrance window to the chamber for additional dust collection

82. The hinged lid of the receiver housing for the regeneration of filter bags (4, 9)

83. Hinged lid of the receiver housing for the regeneration of filter cartridges (Figs. 5, 12, 14)

84. Fixing clamps of the distribution tubes of compressed air along the filtering sleeves (figure 4)

85. Fixing clamps of the distribution tubes of compressed air through the filter cartridges (figure 5)

86. Service site (Fig.2, 13, 15)

87. Service platform in the cleaned air chamber between the main dust collection chambers (Fig.13, 15)

88. Service hatch of the additional hopper (Fig.3, 14, 16)

89. The front end wall of the chamber for additional dust collection (figure 3)

90. The roof overlap of the chamber additionally purified air (figure 5)

Claims (2)

1. Filter bag-cartridge for air purification from mechanical impurities, containing at least one module of two-stage air purification, having at least one main dust collection chamber containing a window in the front end wall and provided with perforated panels in the upper part and vertically located frame filtering sleeves, fixed with upper open ends in the holes of the perforated panels and located in the main dust collecting chamber in two sections with a gap of I wait for them, forming a service passage on the perforated panels between the open ends of the filter bags of both hose sections, at least one inlet dust settling chamber installed with the front end wall of the main dust collection chamber covering at least one inlet for entering contaminated air, the chamber cleaned air with a service door installed on the main dust collection and inlet dust precipitation chambers, the main hopper with a unloader and an automatic shutter in the dust outlet at least one additional air purification module comprising an additional dust collection chamber with filter cartridges and additional perforated panels mounted on it, filter cartridges, an additional purified air chamber with a service door and at least one outlet pipe for additionally purified air, an additional hopper with a unloader and automatic shutter ohms in the dust outlet, located under the additional dust collection chamber, Venturi tubes installed in filter bags and cartridges, individual regeneration systems for each section of filter bags and cartridges, each of which includes compressed air receivers and transfer tubes connected to them via built-in pulse valve units, placed in chambers of purified and additionally purified air, and equipped with impulse tubes, which are located opposite the outlet openings from the filter sleeves and cartridges and turned into their internal cavity, boxes with rotary covers for accommodating compressed air receivers with built-in pulse valves installed on the roof of the filter, characterized in that the chamber for additional dust collection and the chamber for additional purified air are made over the entire width filter, additional perforated panels for attaching filter cartridges are installed horizontally, an additional purified air chamber is installed on the camera dust collection with coverage of additional perforated panels and made with the placement of a service door in the front end wall, filter cartridges are placed in the additional dust collection chamber vertically in two sections along its length with a gap between them and mounted on additional perforated panels by flange mounting from the side of the camera of additional purified air with the formation in the chamber on additional perforated panels of the service passage between the filter flanges cartridges of both cartridge sections, the additional dust collection chamber is made with an inlet section extending beyond the front end wall of the chamber of the additionally cleaned air and an expansion section located under the filter cartridges, while the inlet section of the additional dust collection chamber has an inlet window for receiving purified air made over the entire width additional dust collection chambers and placed at the level of additional perforated panels, and inclined mounted the front wall, which the upper end is hermetically connected to the rear end wall of the main dust collection chamber, and the lower end to the front wall of the additional dust collection chamber with the formation of an input window in it across the entire width of the chamber, in addition, the dust outlet of the discharge device of the main hopper is located behind the front wall of the hopper , the purified air chamber is made with an outlet portion protruding beyond the rear end wall of the main dust collecting chamber, which is installed at the input the area of the chamber for additional dust collection with the coverage of the aforementioned upper entrance window for receiving purified air and the front end wall of the chamber for additional purified air, while the upper entrance window for receiving purified air of the inlet section of the chamber for additional dust collection opposite the service door of the chamber of additional purified air is blocked by a service grating connecting the service passage in the cleaned air chamber with the service passage in the additionally cleaned air chamber , the window in the front end wall of the main dust collecting chamber is covered by a louvre grill with horizontally mounted plates that are inclined downward towards the inlet dust settling chamber, and the outlet pipe for additionally purified air is placed on one of the outer vertical walls of the additionally purified air chamber. 2. Filter bag-cartridge for air purification from mechanical impurities according to claim 1, characterized in that when manufacturing a filter with two modules for two-stage air purification and two modules for additional air purification, modules for additional air purification are installed mirror-like, and additional dust collection chambers and cleaned air are connected in pairs with adjacent to each other through vertical dividing walls, in addition, additional air purification modules are installed in the filter between two-stage air purification barrels in which inlet dust settling chambers are located at the filter edges and the cleaned air chambers are installed with their outlet sections at the inlet sections of the additional dust collection chambers covering the front end walls of the additional purified air chambers and the upper entrance windows for receiving purified air of the inlet sections of the additional dust collection to ensure that they receive two oppositely directed streams of purified air, while vertical the dividing wall between the additionally cleaned air chambers is equipped with a central service door, which, together with service doors in the cleaned air chambers, service doors in the front end walls of the additional cleaned air chambers and service grating ladders, provides a through service passage along the entire length of the filter.

Images