CN111467899A

CN111467899A - Energy-saving sack dust collector for boiler exhaust purification

Info

Publication number: CN111467899A
Application number: CN202010297997.7A
Authority: CN
Inventors: 马忠海
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-07-31

Abstract

The invention discloses an energy-saving cloth bag dust removal device for boiler tail gas purification, which comprises a base, wherein an air inlet and an air outlet are respectively formed in two opposite side walls of the base, a purification chamber communicated with the air inlet and the air outlet is formed in the side wall of the base, a plurality of support cylinders are arranged in the purification chamber, the support cylinders are made of elastic materials, a dust removal cloth bag is sleeved outside the support cylinders, an object placing groove is formed in the side wall of the base, a telescopic air bag is arranged in the object placing groove, the telescopic air bag is communicated with the inside of the support cylinders through a guide pipe, and a pressure release valve is arranged in the. The device is pushed to operate by utilizing the heat energy of the boiler tail gas, so that the telescopic air bag is continuously inflated, the elastic supporting cylinder is intermittently supplied with gas under the action of the pressure release valve, and the supporting cylinder can be continuously expanded and contracted, so that dust on a dust removal cloth bag sleeved outside the supporting cylinder can be shaken off, and the aim of removing dust is fulfilled and a large amount of energy is saved.

Description

Energy-saving sack dust collector for boiler exhaust purification

Technical Field

The invention relates to the technical field of environment-friendly purification equipment, in particular to an energy-saving cloth bag dust removal device for purifying boiler tail gas.

Background

The emission index of dust (including fly ash and carbon black) contained in the boiler flue gas can reach several times to tens of times of the environmental protection specified index when the dust is not purified, so that the boiler tail gas is generally purified by using a bag-type dust collector when the boiler tail gas is discharged.

However, after the bag-type dust collector is used for a period of time, a large amount of dust is adsorbed on the internal filter bag to affect the subsequent purification process, and in the prior art, high-pressure pulse air needs to be introduced into the filter bag to shake off the air on the filter bag. Because the high-pressure air is generated and the large electric energy is consumed, and meanwhile, the boiler tail gas contains a large amount of waste heat and is not utilized, the waste is caused, and therefore the application document provides the energy-saving cloth bag dust removing device for purifying the boiler tail gas.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides an energy-saving bag type dust collector for purifying boiler tail gas.

In order to achieve the purpose, the invention adopts the following technical scheme:

an energy-saving cloth bag dust removal device for purifying boiler tail gas comprises a base, wherein two opposite side walls of the base are respectively provided with an air inlet and an air outlet, the side wall of the base is provided with a purification chamber communicated with the air inlet and the air outlet, a plurality of supporting cylinders are arranged in the purification chamber and made of elastic materials, a dust removal cloth bag is sleeved outside the supporting cylinders, the side wall of the base is provided with an object placing groove, telescopic air bags are arranged in the object placing groove and are communicated with the inside of the supporting cylinders through guide pipes, pressure relief valves are arranged in the guide pipes, the side wall of the base is provided with an air suction cavity, a sliding plug is connected in the air suction cavity in a sealing and sliding manner, the upper end of the base is provided with a one-way air inlet, the side wall of the base is provided with a one-, and a pushing device for pushing the sliding plug to move up and down is arranged in the liquid storage cavity.

Preferably, the pushing device comprises a piston which is connected in a sealed sliding manner in a liquid storage cavity, the liquid storage cavity is filled with low-boiling-point evaporating liquid, a through hole communicated with the liquid storage cavity is formed in the inner top of the air inlet, a sealing plug is connected in the through hole in a sealing and sliding manner, the sealing plug comprises an upper plug and a lower plug which are fixedly connected together, the upper plug is made of metal material with good heat conduction, the lower plug is made of heat insulation materials, the base is also made of heat insulation materials, the sealing plug, the piston and the sliding plug are fixedly connected through a connecting rod, the side wall of the base is provided with a square groove, a sliding block is connected in the square groove in a sealing and sliding way, and the sliding block is elastically connected to the inner bottom of the square groove through a spring, a liquid guide pipe and a liquid return pipe are communicated between the square groove and the liquid storage cavity, and a first check valve and a second check valve are respectively installed in the liquid guide pipe and the liquid return pipe.

Preferably, the side wall of the supporting cylinder is provided with a plurality of air holes communicated with the inside of the supporting cylinder, and the air holes are distributed at equal intervals along the side wall of the supporting cylinder.

The invention has the following beneficial effects:

1. the low-boiling-point evaporating liquid in the liquid storage cavity is evaporated and vaporized by utilizing the heat contained in the boiler tail gas, so that the pushing device is operated, the telescopic air bag is continuously inflated, the elastic support cylinder is intermittently supplied with gas under the action of the pressure release valve, and the support cylinder can be continuously expanded and contracted, so that dust on a dust removal cloth bag sleeved outside the support cylinder can be shaken off, and the purpose of removing dust is achieved, and a large amount of energy is saved;

2. the heat energy of the boiler tail gas is consumed to remove dust, so that the temperature of the tail gas during emission can be greatly reduced, the damage of the high-temperature tail gas to a dust removing part is avoided, the oxidation process of metal parts in the dust removing device is also prevented from being accelerated by high temperature, and the service life of the dust removing device is prolonged;

3. through set up a plurality of gas pockets on the support cylinder for exhaust air is direct to be discharged from the gas pocket, so both can reduce the loss of kinetic energy when the air blowout when pulsed air current emits into the support cylinder, makes the dust change to drop from the dust removal sack, still can carry the dust whereabouts during air current discharges simultaneously, thereby promotes dust removal effect.

Drawings

Fig. 1 is a schematic structural diagram according to a first embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic structural diagram of a second embodiment of the present invention.

In the figure: the device comprises a base 1, an air inlet 2, a purification chamber 3, a supporting cylinder 4, a dust removal cloth bag 41, an air hole 42, an air outlet 5, a liquid storage cavity 6, a piston 7, a sealing plug 8, a lower plug 81, an upper plug 82, a through hole 9, an air pumping cavity 10, a one-way air inlet 101, a one-way air outlet 102, an article placing groove 11, a telescopic air bag 12, a conduit 13, a pressure release valve 131, a first air exhaust hole 14, a liquid guide tube 15, a first one-way valve 151, a liquid return tube 16, a second one-way valve 161, a sliding plug 17, a square groove 18, a sliding block 19, a spring 20.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

The first embodiment is as follows:

referring to fig. 1-2, an energy-saving cloth bag dust removal device for boiler tail gas purification comprises a base 1, wherein two opposite side walls of the base 1 are respectively provided with an air inlet 2 and an air outlet 5, the side walls of the base 1 are provided with a purification chamber 3 communicating the air inlet 2 with the air outlet 5, a plurality of support cylinders 4 are arranged in the purification chamber 3, the support cylinders 4 are made of elastic materials, and a dust removal cloth bag 41 is sleeved outside the support cylinders 4. The lower end of the base 1 is provided with a first exhaust hole 14 communicated with the inside of the support cylinder 4.

Because the dust removal cloth bag 41 is soft in texture and can swing back and forth along with the air flow, the support cylinder 4 is arranged to support the dust removal cloth bag 41.

The lateral wall of base 1 has been seted up and has been put thing groove 11, is equipped with flexible gasbag 12 in putting thing groove 11, and flexible gasbag 12 passes through pipe 13 and the inside intercommunication of a support section of thick bamboo 4, installs relief valve 131 in the pipe 13.

It should be noted that, by providing the pressure release valve 131 in the conduit 13, a certain amount of air stored in the air bag 12 is discharged, so that the discharged air has a high flow rate, and when the air is discharged into the support cylinder 4, the air pressure in the support cylinder 4 can be instantly increased to swell the support cylinder 4 and the dust removal cloth bag.

The lateral wall of base 1 has been seted up and has been extracted air the chamber 10, and sealed sliding connection has sliding plug 17 in the chamber 10 of extracting air, and one-way inlet port 101 has been seted up to the upper end of base 1, and the one-way venthole 102 with the inside intercommunication of flexible gasbag 12 has been seted up to the lateral wall of base 1, and stock solution chamber 6 has been seted up to the lateral wall of base 1, installs the thrust unit who promotes sliding plug 17 and reciprocate in the stock solution chamber 6.

It should be noted that the one-way air inlet hole 101 only allows air to flow into the air pumping cavity 10, and the one-way air outlet hole 102 only allows air to flow into the telescopic air bag 12 from the air pumping cavity 10, and specifically, during manufacturing, a one-way valve is installed in the air inlet hole or the air outlet hole, so that the air inlet hole or the air outlet hole has a one-way air inlet or outlet function.

The pushing device comprises a piston 7 connected in the liquid storage cavity 6 in a sealing and sliding mode, and low-boiling-point evaporation liquid is filled in the liquid storage cavity 6, specifically, the low-boiling-point evaporation liquid is alcohol, and the boiling point of the low-boiling-point evaporation liquid is about 80 degrees.

The inner top of the air inlet 2 is provided with a through hole 9 communicated with the liquid storage cavity 6, a sealing plug 8 is connected in the through hole 9 in a sealing and sliding manner, the sealing plug 8 comprises an upper plug 82 and a lower plug 81 which are fixedly connected together, the upper plug 82 is made of a metal material with good heat conduction, the lower plug 81 is made of a heat insulation material, and the base 1 is also made of a heat insulation material.

All through connecting rod fixed connection between sealing plug 8, piston 7 and the sliding plug 17, square groove 18 has been seted up to the lateral wall of base 1, and square inslot 18 internal seal sliding connection has slider 19, and slider 19 passes through spring 20 elastic connection at the interior bottom in square groove 18. The inner top of the air outlet 5 is provided with a second air vent 21 communicated with the square groove 18, and the slide block 19 can move up and down without obstruction by the arrangement of the second air vent 21.

The square groove 18 and the liquid storage cavity 6 are communicated with a liquid guide tube 15 and a liquid return tube 16, it should be noted that the communication position of the liquid guide tube 15 and the liquid storage cavity 6 is located at the higher position of the inner wall of the liquid storage cavity 6, the piston 7 is located below the liquid inlet position of the liquid guide tube 15 in the initial state, and the communication position of the liquid return tube 16 and the liquid storage cavity 6 is located at the inner bottom of the liquid storage cavity 6.

And a first check valve 151 and a second check valve 161 are respectively installed in the liquid guide tube 15 and the liquid return tube 16. The first check valve 151 only allows the evaporated liquid to flow from the liquid guide tube 15 into the square groove 18, and the second check valve 161 only allows the evaporated liquid to flow from the liquid return tube 16 into the liquid storage chamber 6.

It should be noted that the first check valve 151 is installed at the connection between the liquid guide tube 15 and the square groove 18, and the second check valve 161 is installed at the connection between the liquid return tube 16 and the liquid storage chamber 6, so as to prevent the evaporated liquid from flowing into the liquid guide tube 15 or the liquid return tube 16, which may result in the partially evaporated liquid not functioning.

In this embodiment, when the device is used, a part of the boiler tail gas is discharged into the gas inlet 2 at intervals, specifically, when the device is used, an electromagnetic control valve can be installed in the gas inlet 2 to achieve the purpose of gas inlet at intervals, and the boiler tail gas is discharged from the gas outlet 5 after dust is adsorbed by the dust removal cloth bag 41.

And in the initial state, the whole of the lower plug 81 and most of the upper plug 82 are exposed at the lower side of the through hole 9, after the boiler tail gas contacts with the upper plug 82, the heat in the tail gas can be transferred to the low-boiling-point evaporating liquid in the liquid storage cavity 6 from the upper plug 82 with good heat conduction, and the low-boiling-point evaporating liquid starts to evaporate, so that the piston 7, the sealing plug 8 and the sliding plug 17 are pushed to move upwards together, when the piston 7 moves to the position above the liquid inlet position of the liquid guide tube 15, the upper plug 82 in the sealing plug 8 enters the liquid storage cavity 6, and at the moment, the lower plug 81 made of a heat insulating material blocks the heat transfer inside and outside the liquid storage cavity 6, the evaporating liquid in the evaporating cavity 6 is greatly reduced in speed, and the evaporated liquid which is vaporized flows into the square groove 18 along the liquid guide tube 15 and pushes the sliding block. The piston 7 and the sealing plug 8 in the liquid storage cavity 6 move downwards again, so that the whole of the lower plug 81 and most of the upper plug 82 are exposed at the lower side of the through hole 9, the upper plug 82 transfers heat in tail gas to low-boiling-point evaporation liquid again, the piston 7 and the sealing plug 8 can move up and down continuously through the reciprocating circulation, the sliding plug 17 is driven to move up and down continuously, and the telescopic air bag 12 can be inflated continuously under the flow limiting effect of the one-way air inlet hole 101 and the one-way air outlet hole 102.

Meanwhile, after the heat cloth bag in the boiler tail gas is absorbed by the evaporation liquid in the liquid storage cavity 6, the temperature of the boiler tail gas can be reduced, the boiler tail gas with high temperature can be prevented from damaging all parts in the dust removal device, and meanwhile, the oxidation speed of all metal parts in the dust removal device can be increased at high temperature, so that the service life of the device is prolonged.

When the air pressure in the telescopic air bag 12 reaches the threshold value of the pressure release valve 131, the pressure release valve 131 is opened, the air in the telescopic air bag 12 can be discharged into the support cylinder 4 at a high speed and then discharged through the first exhaust hole 14, and when the high-speed air flow in the telescopic air bag 12 is discharged into the elastic support cylinder 4, the air pressure in the support cylinder 4 is instantly increased, so that the support cylinder 4 can be swelled, and after the air flow is discharged from the first exhaust hole 14, the elastic support cylinder 4 is restored, so that the support cylinder 4 is continuously swelled and restored in the long-term use process, so that the dust removal cloth bag 41 sleeved on the outer wall of the support cylinder 4 is also continuously swelled and restored, and the dust adsorbed on the dust removal cloth bag 41 can be shaken on the inner bottom of the purification chamber 3. Thus, the supporting cylinder 4 is continuously expanded and contracted by using the heat energy of the boiler tail gas, so that the dust on the dust removal cloth bag 41 sleeved outside the supporting cylinder 4 can be shaken off, thereby achieving the purpose of dust removal and saving a large amount of energy.

And when the telescopic air bag 12 is discharged into the supporting cylinder 4, the interval period of tail gas discharged into the air inlet 2 is defined, namely, the tail gas of the boiler is stopped being discharged into the air inlet 2, so that the phenomenon that shaken off dust is brought out again when the tail gas is discharged, and the atmosphere is polluted can be prevented.

Under the flow-limiting action of the first check valve 151 and the second check valve 161, the vaporized evaporation liquid continuously flows into the square groove 18 along the liquid guide tube 15 and is gradually condensed into liquid again, at the moment, the air pressure above the sliding block 19 is reduced, the spring 20 extends and discharges the condensed evaporation liquid into the liquid storage cavity 6 along the liquid return tube 16 again, and therefore the device can be continuously recycled.

Example two:

referring to fig. 3, unlike the first embodiment, the sidewall of the supporting cylinder 4 is provided with a plurality of air holes 42 communicated with the inside thereof, and the plurality of air holes 42 are distributed at equal intervals along the sidewall of the supporting cylinder 4.

In this embodiment, the supporting cylinder 4 does not need to be made of an elastic material, and when the high-speed air of the telescopic air bag 12 is exhausted into the supporting cylinder 4, the high-speed air can be directly exhausted from the air hole 42, so that the dust-collecting cloth bag 41 is supported, and after the air flow is exhausted, the dust-collecting cloth bag 41 is recovered, so that the dust adsorbed on the dust-collecting cloth bag 41 can be shaken off.

Meanwhile, the dust on the dust removal cloth bag 41 can be shaken off in this way, the supporting cylinder 4 is not required to deform, the kinetic energy loss during the discharge of high-speed air can be greatly reduced, the swelling amplitude of the dust removal cloth bag 41 is larger, the dust shaking off on the dust removal cloth bag 41 is more thorough, the dust removal cloth bag 41 can be in a relatively clean state for a long time, and therefore in the long-term use process, the dust in the tail gas of the boiler can be better adsorbed, and the good dust removal effect of the device is ensured.

And when the air flow is discharged from the air hole 42, the air flow can also carry the dust on the dust removal cloth bag 41 to fall to the bottom in the purification chamber 3, so that the dust adsorbed on the dust removal cloth bag 41 is easy to fall off, and the dust removal effect on the dust removal cloth bag 41 is further improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides an energy-saving sack dust collector for boiler tail gas purification, includes base (1), its characterized in that, air inlet (2) and gas outlet (5) have been seted up respectively to two relative lateral walls of base (1), the clean room (3) of intercommunication air inlet (2) and gas outlet (5) is seted up to the lateral wall of base (1), be equipped with a plurality of support tubes (4) in the clean room (3), support tube (4) are made by elastic material, support tube (4) overcoat is equipped with dust removal sack (41), the lateral wall of base (1) has been seted up and has been put thing groove (11), be equipped with flexible gasbag (12) in putting thing groove (11), flexible gasbag (12) pass through pipe (13) and support tube (4) inside intercommunication, install relief valve (131) in pipe (13), the lateral wall of base (1) has been seted up and has been extracted air chamber (10), the air suction device is characterized in that a sliding plug (17) is connected to the inner portion of the air suction cavity (10) in a sealing and sliding mode, a one-way air inlet hole (101) is formed in the upper end of the base (1), a one-way air outlet hole (102) communicated with the inner portion of the telescopic air bag (12) is formed in the side wall of the base (1), a liquid storage cavity (6) is formed in the side wall of the base (1), and a pushing device for pushing the sliding plug (17) to move up and down is installed in the liquid storage cavity.

2. The energy-saving cloth bag dust removal device for boiler tail gas purification according to claim 1, wherein the pushing device comprises a piston (7) hermetically and slidably connected in a liquid storage cavity (6), the liquid storage cavity (6) is filled with low boiling point evaporation liquid, a through hole (9) communicated with the liquid storage cavity (6) is formed in the inner top of the air inlet (2), a sealing plug (8) is hermetically and slidably connected in the through hole (9), the sealing plug (8) comprises an upper plug (82) and a lower plug (81) which are fixedly connected together, the upper plug (82) is made of a metal material with good heat conduction, the lower plug (81) is made of a heat insulation material, the base (1) is also made of a heat insulation material, the sealing plug (8), the piston (7) and the sliding plug (17) are fixedly connected through a connecting rod, a groove (18) is formed in the square side wall of the base (1), the improved liquid storage device is characterized in that a sliding block (19) is connected in the square groove (18) in a sealing and sliding mode, the sliding block (19) is elastically connected to the inner bottom of the square groove (18) through a spring (20), a liquid guide pipe (15) and a liquid return pipe (16) are communicated between the square groove (18) and the liquid storage cavity (6), and a first check valve and a second check valve are respectively installed in the liquid guide pipe (15) and the liquid return pipe (16).

3. The cloth bag dust collector for purifying the tail gas of the energy-saving boiler as claimed in claim 1 or 2, wherein the side wall of the supporting cylinder (4) is provided with a plurality of air holes (42) communicated with the inside of the supporting cylinder, and the plurality of air holes (42) are distributed at equal intervals along the side wall of the supporting cylinder (4).