CN212396156U

CN212396156U - Pulse blowing dust remover

Info

Publication number: CN212396156U
Application number: CN202021623101.1U
Authority: CN
Inventors: 冯士光; 王玉盛; 吴均; 郝瑞丰; 王益振
Original assignee: Tianjin Port No1 Stevedoring Co ltd
Current assignee: Tianjin Port No1 Stevedoring Co ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-01-26
Anticipated expiration: 2030-08-07

Abstract

The utility model discloses a pulse blowing dust remover, which comprises a dust remover body, a truss, a blowing device, a filtering device and a PLC control system, wherein the dust remover body comprises an upper box body, a middle box body and an ash bucket at the lower part; a pattern plate is arranged between the upper box body and the middle box body; the middle box body is provided with a dust inlet, the blowing device comprises an air bag assembly, a pressure reducing valve, a blowing main pipe and a pulse instrument, the air bag assembly is arranged outside the dust remover body and comprises an air bag and a through type pulse valve, the air bag is provided with an air inlet which is communicated with a blowing pipe in the upper box body through a communicating pipe, and the through type pulse valve is connected with the pulse instrument. The utility model has the advantages that: the structure is simple, and the maintenance is convenient; the dust removal effect is obviously improved, and the failure rate is reduced; the service life of the dust removal filter bag is prolonged.

Description

Pulse blowing dust remover

Technical Field

The utility model belongs to the technical field of the dust removal is clean, especially, relate to a pulse jetting dust remover. Is used for port bulk grain operation.

Background

In the prior dust removal system for bulk grain operation, a British Calvis dust removal system is adopted, the cleaning and blowing modes of the system are both driven by a motor to rotate, and a blowing period is triggered by pneumatic control elements such as an excitation valve, a two-position three-way valve, a pneumatic delayer, a pneumatic back-blowing valve and the like. The system has the advantages of multiple pneumatic element control links, high failure rate and high maintenance frequency. And the pneumatic control element part needs to use imported fittings, so that the fittings cost is high, and the supply period is unstable. The blowing effect is not good and the dust removal effect is directly influenced.

Disclosure of Invention

In order to solve the problems, the utility model aims at providing a pulse injection dust remover is used for the dust remover of present operation with neotype pulse injection bag-type dust removal cleaning system, improves dust removal effect, reduces the fault rate.

In order to solve the technical problem, the utility model discloses a technical scheme is: a pulse blowing dust remover comprises a dust remover body, a truss, a blowing device, a filtering device and a PLC control system, wherein the dust remover body comprises an upper box body, a middle box body and an ash bucket at the lower part; a pattern plate is arranged between the upper box body and the middle box body; the middle box body is provided with a dust inlet, the blowing device comprises an air bag assembly, a pressure reducing valve, a blowing pipe and a pulse instrument, the air bag assembly is arranged outside the dust remover body and comprises an air bag and a through type pulse valve, the air bag is provided with an air inlet which is communicated with the blowing pipe in the upper box body through a communicating pipe, and the through type pulse valve is connected with the pulse instrument. .

The filtering device is positioned in the middle box body, the filter bag is fixed on the pattern plate through the filter bag framework, and a plurality of holes are formed in the pattern plate and correspond to the injection branch pipes connected with the injection pipes.

The end part of the blowing branch pipe is provided with a venturi.

The air bag is provided with a plurality of air inlet channels with straight-through pulse valves to the upper box body.

The PLC adopts two control modes of differential pressure or pulse instrument timing.

The upper box body is provided with a top cover, so that the filter bag framework can be conveniently drawn out.

The utility model has the advantages that:

1) the low-pressure pulse blowing technology is adopted, so that the ash removal efficiency is high, and the energy consumption is low. A straight-through solenoid pulse valve is used. The blowing pressure is only 0.5-0.7 MPa, the resistance is low, the opening and closing are quick, and the ash removal capacity is strong. Because the ash removal effect is good, the ash removal period is long, and the energy consumption of back flushing gas is reduced.

2) The air duct is arranged by adopting a collecting pipe, and the structure is compact.

3) The whole operation process of the dust removing equipment is realized by adopting an advanced PLC (programmable logic controller). The pressure difference or timing control mode is used, the reliability is high, the service life is long, and the operation and the use of a user are facilitated.

4) The straight-through electromagnetic pulse valve has long service life and good reliability. The pressure born by the pulse valve membrane and the impact force during opening and closing are lower, and simultaneously, because the ash removal period is longer, the opening times of the pulse valve are correspondingly reduced, so that the service life of the pulse valve is prolonged, and the use reliability of the pulse valve is improved.

5) The equipment has small running resistance and good blowing effect. The dust remover adopts the off-line deashing mode of pulse back blowing at the upper box, has avoided the phenomenon that the dust is adsorbed repeatedly, has improved the effect of pulse jetting deashing, has reduced the sack resistance.

6) The filter bag is convenient to assemble and disassemble and reliable to fix. By adopting the upper part drawing and installing mode, when the bag is replaced, the filter bag framework is drawn out from the upper box body of the dust remover, the dirty bag is put into the ash bucket and taken out from the inlet hole of the ash bucket, and the bag replacing environment is improved. The elastic piston ring of the filter bag close to the bag opening is fixed on the plate hole, the fixation is firm, and the sealing performance is good.

In conclusion, the current environmental protection and safety requirements are met; the dust removal effect is obviously improved, and the failure rate is reduced; the service life of the dust removal filter bag is prolonged.

Drawings

FIG. 1 is a schematic view of the dust collector of the present invention;

FIG. 2 is a schematic side view of the dust collector of the present invention;

FIG. 3 is a schematic top view of the dust collector of the present invention;

FIG. 4 is a schematic view of the air bag assembly of the dust collector of the present invention;

FIG. 5 is a side schematic view of FIG. 4;

FIG. 6 is a schematic view of a communicating pipe of the dust collector of the present invention;

FIG. 7 is a schematic view of a pattern plate of the dust collector of the present invention;

FIG. 8 is a schematic view of a blowing tube of the dust collector of the present invention;

FIG. 9 is a schematic view of the connection of the main pipe of the blowing pipe and the branch pipe;

fig. 10 is a schematic view of the filter bag frame of the dust collector of the present invention in use.

In the figure:

1. dust remover body 2, truss 3, cat ladder and platform

4. Air bag assembly 5, pressure reducing valve 6 and pulse instrument

7. Ash bucket 8, blowing branch pipe 9 and blowing main pipe

10. Communicating pipe 11, filter bag framework 12 and pulse valve

13. Injection pipe connecting piece 14, pattern plate 15 and venturi

16. Water drain valve 17, air bag 18, air inlet pipe

20. Connecting pipe connecting piece 21 and blowing pipe support

Detailed Description

The invention will be described in further detail with reference to the following drawings and embodiments:

as shown in fig. 1 to 10, a pulse blowing dust collector mainly comprises a dust collector body, a truss, an ash bucket, a middle box body, an upper box body, a blowing device, an inlet and outlet air pipe and a PLC control system, wherein a ladder and a platform are arranged outside the dust collector body. The dust remover body comprises an upper box body, a middle box body and an ash bucket at the lower part; a pattern plate is arranged between the upper box body and the middle box body; the middle box body is provided with a dust inlet, the blowing device comprises an air bag assembly, a pressure reducing valve, a blowing main pipe and a pulse instrument, the air bag assembly is arranged outside the dust remover body, the air bag is provided with an air inlet communicated with a blowing pipe in the upper box body through a communicating pipe, and the air bag is provided with a straight-through pulse valve connected with the pulse instrument. The filtering device is positioned in the middle box body, the filter bag is fixed on the pattern plate through the filter bag framework, and a plurality of holes are arranged on the pattern plate and correspond to the blowing branch pipes connected with the blowing main pipe.

The pulse controller control system is used for pulse ash removal and can adopt preset time or pressure difference to control pulse. The pulse controller system controls the operation of the electromagnetic pulse valve, and compressed air is used for dedusting and deashing, and the control mode is online control.

Set up a gas bag in the dust remover outside, the jetting pipe adopts the straight line, adopts eleven jetting pipes, changes supporting novel card, the cloth bag of being convenient for arrange and the blowback, and the pulse solenoid valve is installed additional to the gas bag output, through the wire with solenoid input pulse signal in the solenoid valve body, the pulse valve receives pulse jetting control instrument output signal's control, relies on the pressure variation of two air chambers around the valve, makes the rubber diaphragm warp and warp the opening and closing that realize the pulse valve. The diameter of the rubber diaphragm determines the stroke size of the rubber diaphragm and the opening and closing speed, the larger the diameter of the diaphragm is, the larger the stroke is, and the better the blowing performance is. The venturi tube is added on the head of the filter bag framework, and the working principle is that when air flow blows over the obstacle, the air pressure near the port above the lee side of the obstacle is relatively low, so that adsorption is generated and the air flow is guided. The air flow is uniformly distributed from thick to thin to accelerate the air flow velocity, so that the air forms a vacuum area at the rear side of the venturi outlet. Secondary airflow may be induced. When the filter bag in the dust remover is used for removing dust, secondary air which is 5-8 times of the injected compressed air is induced to enter the filter bag of the dust remover when high-speed air flow passes through the venturi tube, so that the dust removing filter bag is instantaneously and rapidly expanded, and dust accumulated on the filter bag of the dust remover falls off due to the reverse action of the air flow of the dust remover. The venturi tube greatly improves the pulse blowing strength and effect, reduces the consumption of compressed air and saves energy. And a pulse controller is additionally arranged at the lower part of the tank body to control the action of the pulse electromagnetic valve, and the blowing frequency is set according to the parameters of the pulse width, the period interval and the period interval of the controller. The explosion-proof plate adopts mainstream rupture disk, and the material is the stainless steel, through holder and jar body fixed connection, and is more firm, not fragile, safe and reliable.

The back-blowing working pressure of the pulse back-blowing air source of the dust remover is as follows: 0.4-0.6 Mpa, working medium: no corrosive medium exists in the ambient air; gas source medium: the temperature is less than 55 ℃, and the filtration precision is less than 5 mu m and the pressure is adjustable for clean gas after oil removal and water treatment; the use environment is as follows: temperature: 55-180 ℃ at the temperature of-25-55 ℃, and the relative humidity of air is not more than 80%; the air compressor model selection pressure is 0.8Mpa, and the air displacement is about 20% more than the air consumption of the dust remover.

The main pipe of the air inlet pipe is determined according to the number of the dust collectors, the more the number of the dust collectors is, the larger the pipe diameter is, the branch pipe is divided into 4 parts, and an air valve is additionally arranged in front of an air inlet connector of the dust collector.

The utility model relates to a theory of operation of pulse jetting dust remover:

when the dust-containing gas enters the dust remover from the air inlet, the dust-containing gas firstly touches the inclined plate and the baffle plate in the middle of the air inlet and the air outlet, the airflow turns to flow into the ash bucket, and simultaneously the airflow speed is slowed down, so that coarse particle dust in the gas directly flows into the ash bucket due to the inertia effect, and the dust is pre-collected. The air flow entering the dust hopper is then folded upwards to pass through a filter bag with a metal framework inside, the dust is trapped on the outer surface of the filter bag, the purified gas enters a cleaning chamber at the upper part of a filter bag chamber and is collected to an air outlet to be discharged, the dust-containing gas is accumulated on the filter bag more and more along with the increase of time in the process of purifying the filter bag, the resistance of the filter bag is increased, so that the air volume for treatment is gradually reduced, for normal work, the filter bag needs to be cleaned by controlling the resistance within the range of 140 plus 170 mm water column, each control valve is sequentially triggered by a pulse controller to open a pulse valve during cleaning, the compressed air in the air bag is sprayed into each corresponding filter bag through each hole venturi tube by a spray pipe, the filter bag is expanded instantly, the dust accumulated on the surface of the filter bag falls off, and the filter bag is. The dust falls into the dust hopper and is discharged out of the machine body through the dust discharging system. Therefore, dust accumulated on the filter bag is periodically and pulse-sprayed to remove ash, purified gas normally passes through the filter bag, and the operation of a dust removal system is ensured.

The filtration principle is as follows:

dust-containing gas enters from the air inlet, and when the dust-containing gas passes through the dust hopper, part of large-particle dust in the gas is separated out under the action of inertia force and directly falls into the dust hopper. The dust-containing gas enters the filter area of the filter bag of the box body after passing through the dust hopper, the gas passes through the filter bag, and the dust is blocked on the outer surface of the filter bag. The purified gas enters the upper box body through the filter bag opening and is discharged from the air outlet.

Principle of ash removal

Along with the extension of the filtering time, the dust layer on the filter bag is continuously accumulated and thick, the resistance of the dust removing equipment is continuously increased, and when the resistance of the equipment is increased to a set value, the dust removing device starts to remove dust. The electromagnetic pulse valve is opened, compressed air rapidly expands in the upper box body in a very short time and then flows into the filter bag, so that the filter bag expands and deforms to generate vibration, and dust attached to the outer surface of the filter bag is stripped and falls into the dust hopper under the action of reverse airflow scouring. After the ash is removed, the electromagnetic pulse valve is closed, and the chamber is returned to normal filtering state. The ash removal of each chamber is carried out in sequence, and one ash removal period is from the ash removal of the first chamber to the ash removal of the next chamber.

Claims

1. A pulse blowing dust remover comprises a dust remover body, a truss, a blowing device, a filtering device and a PLC control system, wherein the dust remover body comprises an upper box body, a middle box body and an ash bucket at the lower part; a pattern plate is arranged between the upper box body and the middle box body; the middle box body is provided with a dust inlet, and is characterized in that: the blowing device comprises an air bag assembly, a pressure reducing valve, a blowing main pipe and a pulse instrument, wherein the air bag assembly is arranged outside the dust remover body and comprises an air bag and a through type pulse valve, the air bag is provided with an air inlet which is communicated with a blowing pipe in the upper box body through a communicating pipe, and the through type pulse valve is connected with the pulse instrument.

2. The pulse-blowing dust collector as claimed in claim 1, wherein: the filtering device is positioned in the middle box body, the filter bag is fixed on the flower plate through the filter bag framework, and a plurality of holes are formed in the flower plate and correspond to the blowing branch pipes connected with the blowing main pipe.

3. The pulse-blowing dust collector as claimed in claim 2, wherein: the end part of the blowing branch pipe is provided with a venturi.

4. The pulse-blowing dust collector as claimed in claim 1, wherein: the air bag is provided with a plurality of air inlet channels with straight-through pulse valves to the upper box body.

5. The pulse-blowing dust collector as claimed in claim 1, wherein: the PLC adopts two control modes of differential pressure or pulse instrument timing.

6. The pulse-blowing dust collector as claimed in claim 1, wherein: the upper box body is provided with a top cover, so that the filter bag framework can be conveniently drawn out.