CN212091335U - Bag collector blowback ash removal device - Google Patents

Abstract

The utility model relates to a bag type dust collector back-blowing ash-cleaning device, which comprises a box body, wherein the lower part of the box body is an air inlet duct, and the upper part is an air outlet duct; two bin bodies are arranged on two symmetrical sides of the box body, filter bags are arranged in the bin bodies, and the filter bags divide the bin bodies into bin body upper and lower chambers; the upper chamber of the bin body is provided with a blowing component; the upper chamber of the bin body is provided with a valve cover which is suitable for opening and closing the air outlet duct, and the valve cover is controlled to lift by an off-line valve; the upper chamber of the bin body is internally provided with a blowing-assisting valve which is suitable for blowing gas into the upper chamber of the bin body; the work reliability of the off-line valve is improved by the flip-chip installation of the off-line valve, and compressed air acts on a rodless cavity of an air cylinder of the off-line valve most of time, so that the air source consumption is reduced; the blowing-assisting valve is used, so that the positive pressure difference between the inner surface and the outer surface of the filter bag is ensured, the blowing effect is improved, the control cylinder of the blowing-assisting valve is connected with the off-line valve control cylinder in parallel, the additional input of electrical control is avoided, and the back-blowing ash removal effect of the device is enhanced.

Description

Bag collector blowback ash removal device

Technical Field

The utility model relates to a gaseous dust removal technical field, concretely relates to bag collector blowback ash removal device.

Background

Bag type dust collectors are widely used in industrial enterprises and are commonly used for environmental dust removal and dust material collection devices; the common medium-large bag type dust collector comprises a plurality of independent dust collecting cabin bodies, dust adsorbed on the outer surfaces of filter bags is subjected to back flushing to be removed when needed, and when the dust is collected in an ash bucket at the lower part of the cabin bodies, the flowing air flow of the cabin bodies is cut off through an off-line valve in a common structure, so that the negative pressure difference of the inner surface and the outer surface of the filter bags is eliminated, and the blowing effect of the back flushing air flow is improved.

FIG. 1 is a basic structure of a common bag-type dust collector, wherein an air inlet duct is arranged at the lower part of the middle of a dust collector box body, an air outlet duct is arranged at the upper part of the dust collector box body, and a plurality of groups of symmetrical dust collector cabin bodies are arranged at two sides of the box body; the bin body is divided into a bin body upper chamber and a bin body lower chamber by a plurality of groups of cylindrical filter bags; the dust-containing air flow flows into the lower bin body chamber from the air inlet duct through the bin body air duct, the inlet of the bin body air duct is provided with a manual flow regulating valve, the dust-containing air flow in the lower bin body chamber flows to the inner surface from the outer surface of the filter bag, dust is adsorbed on the outer surface of the filter bag, and the filtered air flow flows to the air outlet duct through the upper bin body chamber through the valve port of the off-line valve, then is led to a chimney through the dust removal fan.

When the back-blowing ash removal device works, firstly, the off-line valve is closed to cut off the airflow of the bin body, and theoretically, the pressure difference between the inner surface and the outer surface of a filter bag of the bin body is reduced to zero; at the moment, a part of dust adsorbed on the filter bag naturally falls down due to the action of gravity, and the dust which is not separated is vibrated and beaten down by the intermittent compressed air which is reversely injected by the injection assembly, further separated from the outer surface of the filter bag and deposited on the ash hopper at the lower part of the bin body, thereby completing the operation of once ash removal.

As can be seen from the observation in FIG. 1, because the off-line valve is of a movable cover plate type structure, the valve cover and the valve port are in hard contact by steel materials, and the off-line valve is not designed to be tightly sealed, a part of leakage airflow is inevitable when the off-line valve is closed, namely a certain negative pressure difference is remained on the inner surface and the outer surface of the filter bag; the negative pressure difference causes the direction of the filter bag air flow to be opposite to that of the blowing air flow, so that the blowing dust removal effect is weakened.

On the other hand, for simple installation, a common off-line valve is of a forward installation structure, namely when a rod cavity of an off-line valve cylinder is filled with gas, a valve cover of the off-line valve is lifted upwards, and the valve is opened; when the rodless cavity is aerated, the valve cover descends, and the valve is closed. The off-line valve of the dust remover is in an open state most of the time in normal operation, so compressed air acts on a rod cavity of the cylinder most of the time. Because the rod cavity has two leakage passages on the seal, more compressed gas is consumed than the rod-free cavity; and when the cylinder rod is not tightly sealed, the situation that lifting is weak can occur on the valve cover due to the action of airflow pressure difference when the off-line valve is opened from the closed state, and the valve can not be normally opened, so that the bin body can not enter a dust filtering state.

Furthermore, under the current situation that environmental protection indexes are more severe, the density grade of the filter bag is adjusted upwards, the whole running resistance of the existing dust remover is greatly increased after the novel filter bag is replaced, and therefore higher requirements are provided for the efficiency of the back-blowing dust removal device, and the whole dust removal air volume is ensured not to be obviously reduced.

In conclusion, how to enhance the back-flushing dust-cleaning effect of the device becomes a problem which needs to be solved urgently by researchers of the company.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: how to enhance the back-blowing ash-cleaning effect of the device;

in order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model relates to a bag type dust collector back-blowing ash-cleaning device, which comprises a box body, wherein the lower part of the box body is an air inlet duct, and the upper part is an air outlet duct; two bin bodies are arranged on two symmetrical sides of the box body, filter bags are arranged in the bin bodies, and the filter bags divide the bin bodies into a bin body upper chamber and a bin body lower chamber; the upper chamber of the bin body is provided with a blowing component for blowing air to the filter bag; the upper chamber of the bin body is provided with a valve cover which is suitable for opening and closing the air outlet duct, and the valve cover is controlled to lift by an off-line valve; the upper chamber of the bin body is internally provided with a blowing-assisting valve which is suitable for blowing gas into the upper chamber of the bin body;

when the filter is in a gas filtering state, the offline valve drives the valve cover to open the gas outlet air duct, the filter bag is arranged between the upper chamber and the lower chamber of the bin body, and dust-containing gas flows through the gas inlet air duct, the lower chamber of the bin body, the filter bag, the upper chamber of the bin body and the gas outlet air duct to adsorb dust on the outer surface of the filter bag in an isolated manner;

when the dust-collecting cabin is in a dust-collecting state, the offline valve drives the valve cover to close the air outlet duct, external air flow is supplied to the upper cabin body chamber through the blowing-assisting valve, positive pressure difference is built between the inner surface and the outer surface of the filter bag, the blowing assembly is opened, air is blown into the inner surface of the filter bag, and dust in the filter bag is blown to the bottom of the cabin body.

In order to solve the problem of leakage of rod seal caused by the normal air supply state of a rod cavity in the conventional design, the off-line valve adopted by the utility model comprises two air cylinders fixedly arranged at the top of a bin body, the output ends of the two air cylinders are fixed with a rod connecting plate, the middle part of the rod connecting plate is movably provided with a movable connecting sleeve, the bottom of the movable connecting sleeve is fixed with a valve rod, and the bottom of the valve rod is provided with a valve cover;

the conventional off-line valve adopts the mode that the output end moves downwards to drive the valve cover to close the air outlet duct; the existing adoption sets up the cylinder upside down, that is to say the output upward movement, drives the valve gap and closes the wind channel of giving vent to anger, adopts compressed air to act on rodless chamber for a long time now, has reduced the consumption of compressed air.

In order to ensure that the valve cover can be closed with the air outlet duct and avoid the valve cover from being deformed and damaged by external force, the utility model adopts a movable connecting sleeve which comprises a rod part and a sleeve part which are connected up and down; the middle part of the rod connecting plate is provided with a central hole for the rod part to pass through, the inner diameter of the central hole is larger than the outer diameter of the rod part, the length of the rod part is larger than the thickness of the rod connecting plate, and the rod part passes through the central hole and is connected with the locking nut; the loop bar is fixedly connected with one end of the valve rod;

that is to say, the movable connecting sleeve is movably arranged on the rod connecting plate and can move up and down relative to the rod connecting plate, and when the output end of the air cylinder is at the lowest position, the valve cover falls on the air outlet duct by the self gravity; the tradition is with the fixed setting of activity adapter sleeve and pole connecting plate, and the cylinder drives the valve gap and offsets the formula with the wind channel of giving vent to anger, and the valve gap probably crosses first atress and warp and break, sets up like this and has guaranteed that the valve gap can close totally and target in place and make it avoid external force deformation damage again, has improved the reliability of dust remover blowback deashing.

The utility model has the advantages that: the utility model relates to a bag collector blowback ash removal device, the flip-chip type installation of off-line valve has improved the operational reliability of off-line valve, and compressed gas acts on the rodless chamber of off-line valve cylinder most of the time, has reduced the air supply consumption; the blowing-assisting valve is used, so that positive pressure difference between the inner surface and the outer surface of the filter bag is ensured, the blowing effect is improved, and more blowing compressed air is saved when the back-blowing ash removal device operates in a pressure difference mode; the control cylinder of the blow-assisting valve and the off-line valve control cylinder are connected in parallel and are communicated, so that the extra input of electrical control is avoided, the low-input transformation of the existing dust removing equipment is facilitated, and the back-blowing dust removing effect of the device is enhanced.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic view of a conventional dust collector;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic diagram of the basic structure of an off-line valve actuator;

FIG. 4 is an isolated schematic view of a portion of the components of an off-line valve actuator;

fig. 5 is a schematic view of the structure and installation of the movable connecting sleeve.

In the figure: 1. the automatic air-blowing type air-conditioning system comprises an air inlet duct, a 2 air outlet duct, a3 off-line valve, a 4 blowing assembly, a 5 bin upper chamber, a 6 bin lower chamber, a 7 filter bag, a 8 bin air duct, a 9 manual flow regulating valve, a 21 off-line valve, a 24 blowing assisting valve, a 25 valve cover, a301 supporting foot A, a 302 supporting foot B, a 303 lower base plate, a 305 cylinder, a 306 cylinder long screw rod, a 307 upper connecting plate, a 308 rod connecting plate, a 309 movable connecting sleeve, a 310 valve rod, a 401 locking nut, a 402 rod connecting plate central hole, a 403 rod connecting plate cylinder rod penetrating hole, a 404 aligning guide ring upper pressing plate, a 405 rubber aligning guide ring, a 406 aligning guide ring lower pressing plate, a 407 upper connecting plate screw rod penetrating hole, 408 upper connecting plate cylinder rod penetrating hole, 409 rod plate penetrating hole, a 409 rod penetrating hole, a 410 lower base plate long screw rod threaded hole, a 501 rod part, a 502 sleeve part.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in figure 2, the bag type dust collector blowback ash removal device mainly comprises an upper chamber 5 of a bin body, a lower chamber 6 of the bin body, a blowing assembly 4, a filter bag 7, an off-line valve 21 and an auxiliary blowing valve 23. Wherein, the bin body is divided into a bin body upper chamber 5 and a bin body lower chamber 6 by a plurality of groups of filter bags 7; a nozzle of the injection component 4 is arranged at an opening of the cylindrical filter bag 7, and compressed air is injected to the inner surface of the filter bag 7 periodically; the off-line valve 21 can make the bin body in a dust filtering state, and the other off-line valve 21 can make the bin body in a dust removing initial state; the blow-assist valve 24 can supply additional air flow into the upper chamber 5, and the other blow-assist valve 24 cuts off the additional air flow into the upper chamber 5.

When the dust is normally removed, all bin body off-line valves are in an open state, and the blowing assembly 4 does not work. In the time mode or the pressure difference mode, a certain bin body enters a back-blowing ash-cleaning state in sequence, the bin body firstly closes the off-line valve 21, cuts off the dust-removing airflow of the bin body, weakens and eliminates the negative pressure difference on the inner surface and the outer surface of the filter bag 7 of the bin body, and prepares for back-blowing dust removal of the filter bag 7 of the bin body. In order to further improve the back-blowing efficiency, when the off-line valve of the bin body is closed, the blowing-assisting valve 24 with synchronously switched air ports of the air cylinder 305 is opened, the air flow additionally supplied to the bin body by the blowing-assisting valve 24 counteracts the leakage air of the valve cover 25 of the off-line valve 21, more air flows from the inner surface to the outer surface of the filter bag 7 of the bin body, the positive pressure difference occurs on the inner surface and the outer surface of the filter bag 7, and the back-blowing effect is improved during blowing.

After the off-line valve is closed, the blowing assemblies 4 of the cabin bodies will start to blow in sequence. Because the internal and external surfaces of all filter bags 7 in the bin body are positive pressure difference, the action of blowing gas back blowing is facilitated, floating dust which is blown out by vibration cannot be adsorbed to the external surfaces of other filter bags 7 which are not in a back blowing state in action gaps of a plurality of groups of blowing valves, the whole airflow in the bin body moves downwards, the dust drop is accelerated, and the dust removal effect is further improved.

As shown in fig. 3-5, the present embodiment provides an off-line valve 21 to account for the offset of forces that may be caused by the cylinder rod and valve cover rod of an inverted cylinder pull not being on the same centerline. The actuating mechanism is pre-processed and assembled by a manufacturing factory, the whole machine leaves the factory to ensure the assembly precision, the on-site installation only needs to be carried out with the valve rod 310 for centering and cylinder body verticality calibration operation, and the construction is simple and easy.

Specifically, the off-line valve 21 includes two support legs a301 and B302 formed by machining channel steel, so as to facilitate welding and fixing during field installation. The two supporting legs are connected with the lower base plate 303 of the actuating mechanism through four bolts, the center of the lower base plate 303 is provided with a lower base plate valve rod 310 which penetrates through a hole 409, and two sides of the lower base plate are symmetrically provided with 8 lower base plate long screw thread holes 410. The upper part of the lower bottom plate 303 is provided with two cylinders 305, the cylinder rods of which are upward, and the upper parts of the two cylinders are provided with an upper connecting plate 307. The center of the upper connecting plate 307 is provided with a rubber aligning guide ring 405, and is fixed by an aligning guide ring upper pressing plate 404 and an aligning guide ring lower pressing plate 406. Upper connecting plate screw penetrating holes 407 and upper connecting plate cylinder rod penetrating holes 408 are symmetrically arranged on two sides of the upper connecting plate 307, and then the lower base plate 303, the two cylinders 305 and the upper connecting plate 307 are connected into a whole through 8 cylinders and long screws 306.

Specifically, the ends of the two cylinder rods contain external threads, and a rod connecting plate 308 is mounted on the ends of the two cylinder rods by nuts, and is leveled and locked. The rod connecting plate 308 is provided with a rod connecting plate center hole 402 for connecting the movable connecting sleeve 309, and rod connecting plate cylinder rod through holes 403 are symmetrically arranged on two sides of the rod connecting plate 308 for connecting a cylinder rod. The movable connecting sleeve 309 is a special-shaped component and comprises a rod part 501 with an external thread at the end part and a sleeve part 502 with an internal thread, the rod part of the movable connecting sleeve 309 penetrates through the central hole 402 of the rod connecting plate, the end part is fastened by two locking nuts 401, and the rod part 501 has up-and-down movement of about 2 cm in the central hole 402 of the rod connecting plate. The sleeve portion 502 has an internal thread depth of about 6 cm for connecting with the external thread at the end of the bonnet valve stem 310, and is locked by a nut after the insertion depth is adjusted.

Specifically, the valve cover 25 is basically in a closed position when the actuator is closed in position by adjusting the welding height of the supporting legs of the off-line valve 21 and the screwing depth of the movable connecting sleeve 309 and the valve rod 310. The best adjustment is that when the cylinder 305 rod is at the lowest position, the valve cover 25 falls on the upper air outlet duct 2 by its own weight, and the rod portion 501 connected with the valve rod 310 and the rod connecting plate 308 have a gap of about 1 cm above and below each other. In an abnormal state, the valve cover 25 may not be fully closed when the upper edge of the rod 501 is pressed, and the valve cover 25 may be deformed and broken by an excessive force when the lower edge of the rod 501 is pressed. Therefore, due to the correct application of the movable connecting sleeve 309, the valve cover can be completely closed in place and prevented from being deformed and damaged by external force, and the reliability of reverse blowing and dust removal of the dust remover is improved.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (3)

1. The utility model provides a bag collector blowback ash removal device which characterized in that: the air conditioner comprises a box body, wherein the lower part of the box body is provided with an air inlet duct, and the upper part of the box body is provided with an air outlet duct;

two bin bodies are arranged on two symmetrical sides of the box body, filter bags are arranged in the bin bodies, and the bin bodies are divided into bin body upper chambers and bin body lower chambers by the filter bags;

a blowing component for blowing air to the filter bag is arranged on the upper chamber of the bin body;

the upper chamber of the bin body is provided with a valve cover which is suitable for opening and closing the air outlet duct, and the valve cover is controlled to lift by an off-line valve;

and a blowing assisting valve is arranged in the upper chamber of the bin body and is suitable for blowing gas into the upper chamber of the bin body.

2. The bag type dust collector blowback ash removal device of claim 1, wherein: the off-line valve comprises two air cylinders fixedly arranged at the top of the bin body, the output ends of the two air cylinders are fixed with a rod connecting plate, a movable connecting sleeve is movably arranged in the middle of the rod connecting plate, a valve rod is fixed at the bottom of the movable connecting sleeve, and the valve cover is arranged at the bottom of the valve rod.

3. The bag type dust collector blowback ash removal device of claim 2, wherein: the movable connecting sleeve comprises a rod part and a sleeve part which are connected up and down;

the middle part of the rod connecting plate is provided with a central hole for the rod part to pass through, the inner diameter of the central hole is larger than the outer diameter of the rod part, the length of the rod part is larger than the thickness of the rod connecting plate, and the rod part passes through the central hole and is connected with a locking nut; the sleeve part is fixedly connected with one end of the valve rod.

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