Pressure-equalizing nozzle system for cleaning dust of long filter bag

Abstract

The utility model discloses a pressure-equalizing nozzle system for cleaning ash of a long filter bag, which can improve the ash cleaning performance and is particularly suitable for an ash cleaning system with the long filter bag. The system comprises an injection pipe and a tubesheet which are arranged up and down, as well as a pulse injection assembly and a plurality of filter bags, the air inlet end of the injection pipe is communicated with the pulse injection assembly, a plurality of nozzles communicated with the injection pipe are arranged on the lower surface of the injection pipe, the axes of the nozzles extend in the vertical direction, and at least one air hole is formed in the circumferential surface of each nozzle; a plurality of filter bags are mounted on the tubesheet; openings of the filter bags face upwards, and each filter bag is respectively aligned with one nozzle. By means of the air holes formed in the nozzle, airflow around the nozzle can be sucked in during pulse ash removal, so that secondary airflow enhancement is achieved, and the purposes of saving energy and improving the ash removal effect are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of bag type dust removal, especially a pressure equalizing nozzle system for long filter bag dust removal. BACKGROUND

[0002] The dust removal system is a very important component in industrial dust removal equipment, and its role is to remove the dust accumulated on the filter bag or equipment to achieve high-efficiency operation and long-term stability of the dust remover. The common dust removal method is mainly to release compressed air quickly through a pulse valve, and to guide the compressed air to the filter bag through a spray pipe to make it expand and vibrate, thereby achieving the purpose of removing dust.

[0003] With the development and use of filter assemblies, the length of filter bags is also getting longer. The length of metal filter bags currently reaches about 7.5 m, and the conventional pulse spray system cannot meet the spray requirements of this length. The dust removal effect at the middle and lower positions of the filter bag is not ideal, which will lead to an imbalance in the filtering effect of the upper and lower parts of the long filter bag over a long period of time, and further affect the overall performance of the dust removal system. SUMMARY

[0004] The utility model aims at providing a pressure equalizing nozzle system for long filter bag dust removal to solve the problems in the prior art and improve the dust removal performance, especially for dust removal systems with long filter bags.

[0005] To achieve the above purpose, the solution of the utility model is as follows:

[0006] A pressure equalizing nozzle system for long filter bag dust removal, comprising a spray pipe and a flower plate arranged vertically, a pulse spray assembly, and a plurality of filter bags; the air inlet end of the spray pipe is in communication with the pulse spray assembly, and a plurality of nozzles in communication with the spray pipe are arranged on the lower surface of the spray pipe; the axis of the nozzle extends in the vertical direction, and at least one air hole is arranged on the peripheral surface of the nozzle; a plurality of filter bags are installed on the flower plate; the opening of each filter bag faces upwards, and each filter bag is aligned with one nozzle.

[0007] A pair of air holes are symmetrically arranged on both sides of the nozzle.

[0008] The spray pipe and the flower plate are fixed on the wall plate of the dust removal equipment, and a plurality of support frames are arranged on the flower plate to fix the spray pipe.

[0009] The pulse spray assembly comprises an air pocket and a pulse valve; an air inlet is arranged at the air inlet end of the air pocket to communicate with the air supply equipment; the two ends of the pulse valve are respectively in communication with the air outlet end of the air pocket and the spray pipe.

[0010] Preferably, the air inlet end of the pulse valve is connected with the air outlet end of the air bag, and the air outlet end is connected with the air inlet end of the blowing pipe through a connecting pipe.

[0011] Preferably, the air bag is fixed outside the wall plate of the dust removal equipment by a tripod support.

[0012] With the above technical scheme, the utility model has the following technical effects:

[0013] The utility model discloses a gas hole is set up on the periphery of each nozzle of the blowing pipe, when the pulse blowing assembly completes a blowing action, a large amount of airflow is sprayed into the blowing pipe in an instant and is sprayed out from the port of the nozzle to form the first high-speed airflow for pulse dust removal of the filter bag, and because the airflow is sprayed out from the nozzle in an instant, negative pressure is generated in the nozzle synchronously, the airflow outside the nozzle is sucked in through the gas hole and the negative pressure path formed by the first high-speed airflow carries out the second pulse dust removal of the filter bag, the utility model discloses can realize twice expansion and vibration of the filter bag in a blowing action, thereby shaking off the dust adhered to the filter bag, and can provide the strong dust removal effect, improve the dust removal efficiency, reduce energy consumption and noise, prolong the service life of the filter bag, and the utility model discloses is suitable for long filter bag dust removal of various types and specifications, especially suitable for use in large industrial dust removal equipment, and improves the dust removal performance. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a structure schematic view of the embodiment of the utility model;

[0015] Fig. 2 It is the nozzle sectional view of the embodiment of the utility model;

[0016] BRIEF DESCRIPTION OF DRAWINGS

[0017] 1-blowing pipe; 11-nozzle; 111-gas hole; 2-flower plate; 3-blowing assembly; 31-air bag; 311-air inlet; 32-pulse valve; 33-connecting pipe; 4-filter bag; 5-wall plate; 6-support frame; 7-triangle support. DETAILED DESCRIPTION

[0018] In order to further explain the technical scheme of the utility model, the utility model is described in detail below through specific embodiments.

[0019] Reference Figs. 1-2 As shown in the figure, the utility model discloses a kind of pressure-equalizing nozzle systems for long filter bag dust removal, including upper and lower setting blowing pipe 1 and flower plate 2, and pulse blowing assembly 3 and several filter bags 4;

[0020] The air inlet end of the blowing pipe 1 is communicated with the pulse blowing assembly 3, and the lower surface of the blowing pipe 1 is provided with a plurality of nozzles 11 communicated with the blowing pipe 1, the axis of the nozzles 11 extends along the up-down direction, and the peripheral surface of the nozzles 11 is provided with at least one air hole 111; a plurality of filter bags 4 are mounted on the flower plate 2; the opening of the filter bag 4 faces upward, and each filter bag 4 is aligned with a nozzle 11 respectively.

[0021] Through the above scheme, the air holes 111 are arranged on the peripheral surface of the nozzles 11 of the blowing pipe 1, when the pulse blowing assembly 3 completes a blowing action, a large amount of airflow is sprayed into the blowing pipe 1 in an instant, and the first high-speed airflow for pulse dust removal of the filter bag 4 is formed by being sprayed out from the port of the nozzle 11; and since the airflow is sprayed out from the nozzle 11 in an instant, the negative pressure is generated in the nozzle 11 synchronously, the airflow outside the nozzle 11 is sucked in through the air hole 111 and the negative pressure path formed by the first high-speed airflow to perform the second pulse dust removal on the filter bag 4; the filter bag can be expanded and vibrated twice through one blowing action, so that the dust attached to the filter bag is shaken off, the powerful dust removal effect can be provided, the dust removal efficiency is improved, the energy consumption and noise are reduced, and the service life of the filter bag 4 is prolonged; the utility model is suitable for long filter bag dust removal of various types and specifications, and is especially suitable for use in large industrial dust removal equipment to improve the dust removal performance.

[0022] The specific embodiments of the utility model are shown below.

[0023] The two sides of the nozzle 11 are symmetrically provided with a pair of air holes 111.

[0024] The size of the air hole 111 of the nozzle 11 has a significant influence on the dust removal effect, because the opening size directly affects the strength and distribution of the blowing airflow (especially the secondary airflow), and then affects the dust removal efficiency of the filter bag. Under a certain blowing pressure, the hole diameter of the air hole 111 affects the speed of the blowing airflow and the induced (or called sucked) secondary airflow, and the higher the blowing pressure, the more strict the size requirement for the hole diameter is, so as to ensure that the airflow can effectively enter the filter bag and clean the dust. Experimental research shows that when the blowing pressure is 0.35MPa, the best blowing hole diameter of the metal long filter bag is 16mm, and the blowing distance is 200mm, and under this condition, the peak value of the side wall pressure of the filter bag at any position measuring point is greater than 300Pa, which meets the effective dust removal requirement.

[0025] The blowing pipe 1 and the flower plate 2 are fixed on the wall plate 5 of the dust removal equipment, and a plurality of supporting frames 6 are arranged on the flower plate 2 for fixing the blowing pipe 1, so that the blowing pipe 1 and the flower plate 2 are kept in a horizontal state and are kept parallel to each other. In the embodiment, one end of the blowing pipe 1 is fixed opposite to the wall plate 5, and the supporting frames 6 are arranged at the middle part and the other end of the blowing pipe 1.

[0026] The pulse injection assembly 3 comprises a gas pocket 31 and a pulse valve 32; the gas inlet end of the gas pocket 31 is provided with a gas inlet 311 to be communicated to a gas supply device; the two ends of the pulse valve 32 are respectively communicated to the gas outlet end of the gas pocket 3 and the injection pipe 1.

[0027] Further, the gas inlet end of the pulse valve 32 is connected to the gas outlet end of the gas pocket 3, and the gas outlet end is connected to the gas inlet end of the injection pipe 1 through a connecting pipe 33.

[0028] Meanwhile, the gas pocket 31 is fixed to the outer side of the wall plate 5 of the dust removal device through the tripod support 7, and plays a role of installation and fixation.

[0029] The above embodiments and drawings are not limited to the product form and style of the utility model, and any appropriate changes or modifications made by any ordinary skilled person in the art shall be considered as not departing from the patent category of the utility model.

Claims

1. A uniform pressure nozzle system for cleaning long filter bags, characterized in that: it comprises a nozzle pipe and a flower plate arranged vertically, a pulse blowing assembly and a plurality of filter bags; the air inlet end of the nozzle pipe is communicated with the pulse blowing assembly, and the lower surface of the nozzle pipe is provided with a plurality of nozzles communicated with the nozzle pipe, the axis of the nozzle extends along the vertical direction, and the peripheral surface of the nozzle is provided with at least one air hole; the flower plate is provided with a plurality of filter bags; the opening of the filter bag faces upward, and each filter bag is aligned with a nozzle respectively; the blowing pressure is set to 0.35 MPa, the blowing aperture is set to 16 mm, and the blowing distance is set to 200 mm.

2. The uniform pressure nozzle system for cleaning long filter bags according to claim 1, characterized in that: a pair of air holes are symmetrically arranged on both sides of the nozzle.

3. The uniform pressure nozzle system for cleaning long filter bags according to claim 1, characterized in that: the nozzle pipe and the flower plate are fixed on the wall plate of the dust removal equipment, and the flower plate is provided with a plurality of support frames for fixing the nozzle pipe.

4. The uniform pressure nozzle system for cleaning long filter bags according to claim 1, characterized in that: the pulse blowing assembly comprises an air pocket and a pulse valve; the air inlet end of the air pocket is provided with an air inlet to be communicated with the air supply equipment; and the two ends of the pulse valve are respectively communicated with the air outlet end of the air pocket and the nozzle pipe.

5. The uniform pressure nozzle system for cleaning long filter bags according to claim 4, characterized in that: the air inlet end of the pulse valve is connected with the air outlet end of the air pocket, and the air outlet end is connected with the air inlet end of the nozzle pipe through a connecting pipe.

6. The uniform pressure nozzle system for cleaning long filter bags according to claim 4, characterized in that: the air pocket is fixed on the outside of the wall plate of the dust removal equipment through a tripod support. ​ ​ ​ ​ ​ ​ ​ ​

Images