CN219355656U - Blowing nozzle suitable for metal filter bag dust collector - Google Patents

Abstract

The utility model particularly relates to a blowing device suitable for a metal filter bag dust collector, which comprises a blowing pipe, wherein a plurality of blowing branch pipes are arranged on the blowing pipe in a communicated manner, the blowing branch pipes are arranged in a one-to-one correspondence manner with the metal filter bags, a pressure equalizing structure is arranged in the blowing pipe and is connected with a blowing control device, the blowing control device is connected with the blowing pipe, and the pressure equalizing structure is used for collecting average negative pressure in the metal filter bags; the jet outlet of the jetting branch pipe is provided with a guide structure, and the guide structure guides airflow from the jetting pipe to flow and jet towards the side wall surface of the metal filter bag. The blowing device suitable for the dust removal of the metal film filter bag can enhance the dust removal effect of blowing the filter bag of the metal filter bag dust remover, save the energy consumption of a power fan and prolong the production stopping maintenance period of the dust remover.

Description

Blowing nozzle suitable for metal filter bag dust collector

Technical Field

The utility model belongs to the technical field of metal filter bag dust collection, and particularly relates to a blowing nozzle suitable for a metal filter bag dust collector.

Background

The metal film filter bag dust collecting equipment has the advantages of high temperature resistance, high dust collecting efficiency, good operation stability and the like, and can be rapidly and widely popularized and applied in actual engineering projects. The metal film filter bag is a core component of the dust remover, and directly relates to the dust removal effect and the energy consumption. In practical application, the metallic filter bag is rarely replaced, and a large amount of dust can be accumulated on the metallic film after long-term use, so that the metallic filter bag is difficult to clean. For the ash removal on a metal film filter bag, compressed air is used as power at present, a pulse blowing mechanism of a traditional bag-type dust remover is utilized to instantly release compressed air flow, and secondary air flow which is several times higher than the compressed air flow is induced to be injected into the filter bag, and for the traditional bag-type dust remover, after the compressed air is injected, the bag can be rapidly expanded and vibrated to deform so as to achieve the ash removal purpose; however, the metal film filter bag has high rigidity, and after compressed air is sprayed out, the compressed air cannot effectively act on the surface of the metal film filter bag, so that the aim of effectively removing ash cannot be achieved through effective expansion and tremble amplitude.

In addition, negative pressure is generated in the metal film filter bag due to the working principle and the working mode in the operation process, dust is blocked into gaps in the metal film filter bag along with continuous filtration and dust removal of the metal film filter bag, the negative pressure value in the metal film filter bag can be increased, the operation condition of the whole dust removing equipment can be greatly influenced if the negative pressure value is large, and the service life of the whole device can be reduced; the existing pressure detection mode is that pressure sensors are arranged at the inlet and outlet of the whole dust remover to detect the pressure difference of the whole box body. When the detected pressure difference exceeds the limit, the whole dust collector system is started to spray, the control mode is energy-consuming, the dust collection efficiency is limited, and the long-time generation operation is not friendly.

Disclosure of Invention

In order to solve the dust removal problem of the metal film filter bag, the utility model provides a blowing nozzle suitable for a metal filter bag dust remover, and the technical scheme adopted by the utility model is as follows: the blowing nozzle suitable for the metal filter bag dust collector comprises a blowing pipe, wherein a plurality of blowing branch pipes are arranged on the blowing pipe in a communicated manner, the blowing branch pipes are arranged in a one-to-one correspondence manner with the metal filter bags, a pressure equalizing structure is arranged in the blowing pipe and is connected with a blowing control device, the blowing control device is connected with the blowing pipe, and the pressure equalizing structure is used for collecting average negative pressure in the metal filter bags; the jet outlet of the jetting branch pipe is provided with a guide structure, and the guide structure guides airflow from the jetting pipe to flow and jet towards the side wall surface of the metal filter bag.

Preferably, the pressure equalizing structure comprises a pressure equalizing pipe, the pressure equalizing pipe is connected with a pressure transmitter, and the pressure transmitter is connected with the injection control device; the pressure equalizing pipe is arranged in the jetting pipe, a plurality of collecting pipes are communicated with the pressure equalizing pipe, and one collecting pipe is arranged in one jetting branch pipe; the end part of the collecting pipe stretches into the metal filter bag, a hole is formed in the end part of the collecting pipe stretching into the metal filter bag, and the collecting pipe is communicated with the metal filter bag through the hole.

Preferably, the diameter of the orifice provided in the collection tube increases gradually as the distance between the collection tube and the pressure transmitter increases.

Preferably, the guide structure comprises a guide block, the guide block is arranged on the outer wall of the collecting pipe, the section of the guide block is trapezoid, and one end with a larger diameter on the guide block faces the side wall direction of the metal filter bag.

Preferably, the injection branch pipe is separated from the end part of the metal filter bag, the guide block is separated from the inner wall of the injection branch pipe to form an air circulation channel, and one end with a larger diameter on the guide block extends out of the injection branch pipe.

The utility model has the following beneficial effects: the utility model is suitable for the use of a metal film filter bag dust collector, can solve the problems that compressed air of a nozzle of the original filter bag dust collector is concentrated at the center of a filter bag and the vibration amplitude of the metal filter bag is small, and the nozzle concentrates the injected compressed air at the pipe wall of the metal filter bag and has the tangential force effect, so that the high-efficiency dust collection can be realized; the utility model can detect the pressure of a group (a row or a column or 10-12) of metal filter bags by arranging the pressure equalizing structure, and after the detected negative pressure value reaches a certain value, the blowing control device starts blowing to remove dust from the metal filter bags.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is an enlarged view of a portion of the end of the collection tube.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The technical means used in the examples are conventional means well known to those skilled in the art unless otherwise indicated.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, and do not indicate or imply that the devices or elements 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 utility model.

Because the metal film filter bag is porous staggered space after long-term use, dust can be gradually attached to the outer surface of the filter material, and part of dust is difficult to clear by pulse blowing after being embedded in the staggered space, so that the ventilation property of the filter bag is reduced, the running resistance of the interior of the dust remover is increased, the running state of the dust remover is changed to a certain extent, and the subsequent dust removing effect is influenced. The utility model provides a blowing device suitable for deashing of a metal film filter bag, which can control the opening of a nozzle through the negative pressure in the metal film filter bag so as to enhance the dust removing effect of the blowing of the filter bag of the metal filter bag dust remover and prolong the production stopping maintenance period of the dust remover.

As shown in fig. 1-2, a blowing nozzle for a metal filter bag dust collector comprises a blowing pipe 1, wherein the blowing pipe 1 is connected with a compressed air bag 10 through a blowing valve 7, and the blowing valve 7 is controlled to be opened or closed by a blowing control device.

The blowing pipe 1 is provided with a plurality of blowing branch pipes 2 in communication, the blowing branch pipes 2 and the metal filter bags 8 are arranged in one-to-one correspondence, namely one blowing branch pipe 2 corresponds to one metal filter bag 8 and can be used for blowing dust on the metal filter bags under pressure. A pressure equalizing structure is arranged in the injection pipe 1 and is connected with an injection control device, the injection control device is connected with the injection pipe 1, and the pressure equalizing structure is used for collecting average negative pressure in a plurality of metal filter bags 8; when the pressure equalizing structure detects that the negative pressure value in the metal filter bags 8 reaches a set value, the blowing control device controls the blowing valve 7 to open for blowing, the pressure equalizing structure collects the average value of the negative pressures in the metal filter bags 8, and blowing can be performed when the value reaches the set value.

The jet port of the jetting branch pipe 2 is provided with a guiding structure, the guiding structure guides the airflow from the jetting pipe 1 to flow and jet towards the side wall surface of the metal filter bag 8, the guiding structure disperses the airflow into the direction of jetting towards the side wall surface of the metal filter bag 8, and the airflow dispersed by the guiding structure is tangentially jetted towards the side wall of the metal filter bag 8.

The pressure equalizing structure comprises a pressure equalizing pipe 3, the pressure equalizing pipe 3 is connected with a pressure transmitter 6, the pressure transmitter 6 is connected with a blowing control device, the pressure transmitter 6 transmits the acquired value to the blowing control device, and the blowing control device opens a blowing valve 7 after comparing the acquired value with a set value; the pressure equalizing pipe 3 is sleeved in the blowing pipe 1, the pressure equalizing pipe 3 is arranged at the wall surface close to the blowing pipe 1, so that the air flow is not influenced, the pressure equalizing pipe 3 is communicated with a plurality of collecting pipes 4, and one collecting pipe 4 is arranged in one blowing branch pipe 2; the tip of collection pipe 4 stretches into in the metal filter bag 8, when metal filter bag 8 is in normal operating condition, its metal filter bag 8 inside (collection pipe 4 place side) is in the negative pressure state, and this negative pressure can be gathered by collection pipe 4 because metal filter bag 8 theory of operation and operating condition bring during this kind of negative pressure state to carry out pressure detection, set up hole 9 on the tip that collection pipe 4 stretches into in the metal filter bag 8, communicate through hole 9 between collection pipe 4 and the metal filter bag 8, the pressure value can make pressure transmitter can survey through hole 9.

The diameter of the hole 9 provided in the collecting pipe 4 increases gradually with the distance between the collecting pipe 4 and the pressure transmitter 6. The end of the collecting tube 4 is plugged, a hole 9 is formed in the plugged position, the collecting tube 4 far away from the pressure transmitter 6 is longer in the flowing path of the air flow, therefore, the diameter of the hole 9 is larger in the collecting tube 4 far away from the pressure transmitter 6, so that the pressure value reaching the pressure transmitter 6 is similar to the average value of the collecting tubes 4, namely, the pressure value collected by the collecting tubes 4 at the moment is not different, the negative pressure in the metal filter bags 8 can be ensured to be not different, the dust coverage degree of the dust is not different, the group of metal filter bags 8 are blown at the moment, the problem of integral blowing after the integral metal filter bags are detected by a pressure detection device is avoided, blowing (namely, which row of negative pressure is blown by high pressure) is unified after the metal filter bags are positioned, and integral energy saving can be performed.

The guide structure comprises a guide block 5, the guide block 5 is arranged on the outer wall of the collecting tube 4, the section of the guide block 5 is trapezoid, and one end with a larger diameter on the guide block 5 faces the side wall direction of the metal filter bag 8. When the air pressure air is blown out from the blowing branch pipe 2, the air pressure air flows towards the side wall direction of the metal filter bag 8 under the action of the guide block 5, so that the metal filter bag 8 can be better dedusted.

The further technical scheme is that the injection branch pipe 2 is separated from the end part of the metal filter bag 8, the guide block 5 is separated from the inner wall of the injection branch pipe 2 to form an air circulation channel, and one end with a larger diameter on the guide block 5 extends out of the injection branch pipe 2. When the air flow blows out from the end of the metal filter bag 8 after the air pressure is blown out, at this time, a part of the air flow blows to the side wall of the metal filter bag 8, and another part of the air flow blows over the end of the metal filter bag 8, or the end can be blown out, and since the metal filter bag 8 is mounted on the pattern plate 11, the surface of the pattern plate 11 can be blown out.

The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications, variations, alterations, substitutions made by those skilled in the art to the technical solution of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the spirit of the design of the present utility model.

Claims (5)

1. The utility model provides a be suitable for jetting nozzle of metal filter bag dust remover, includes jetting pipe (1), be provided with a plurality of jetting branch pipes (2) on jetting pipe (1) intercommunication, jetting branch pipe (2) set up its characterized in that with metal filter bag (8) one-to-one: a pressure equalizing structure is arranged in the blowing pipe (1), the pressure equalizing structure is connected with a blowing control device, the blowing control device is connected with the blowing pipe (1), and the pressure equalizing structure is used for collecting average negative pressure in a plurality of metal filter bags (8); the jet outlet of the jet branch pipe (2) is provided with a guide structure, and the guide structure guides airflow from the jet pipe (1) to flow and jet towards the side wall surface of the metal filter bag (8).

2. A blowing nozzle for a metal filter bag collector according to claim 1, characterized in that: the pressure equalizing structure comprises a pressure equalizing pipe (3), the pressure equalizing pipe (3) is connected with a pressure transmitter (6), and the pressure transmitter (6) is connected with a blowing control device; the pressure equalizing pipe (3) is arranged in the blowing pipe (1), a plurality of collecting pipes (4) are communicated with the pressure equalizing pipe (3), and one collecting pipe (4) is arranged in one blowing branch pipe (2); the end part of the collecting pipe (4) stretches into the metal filter bag (8), a hole (9) is formed in the end part of the collecting pipe (4) stretching into the metal filter bag (8), and the collecting pipe (4) is communicated with the metal filter bag (8) through the hole (9).

3. A blowing nozzle for a metal filter bag collector according to claim 2, characterized in that: the diameter of the hole (9) arranged on the collecting pipe (4) gradually increases along with the increase of the distance between the collecting pipe (4) and the pressure transmitter (6).

4. A blowing nozzle for a metal filter bag collector according to claim 3, characterized in that: the guide structure comprises a guide block (5), the guide block (5) is arranged on the outer wall of the collecting pipe (4), the section of the guide block (5) is trapezoid, and one end of the larger diameter of the guide block (5) faces the side wall direction of the metal filter bag (8).

5. A blowing nozzle for a metal filter bag collector according to claim 4, characterized in that: the air-blowing branch pipe (2) is separated from the end part of the metal filter bag (8), the guide block (5) is separated from the inner wall of the air-blowing branch pipe (2) to form an air circulation channel, and one end with a larger diameter on the guide block (5) extends out of the air-blowing branch pipe (2).