CN2426757Y - Bag type dust collector - Google Patents

Abstract

A bag-type dust collector is composed of an upper box body, a lower box body, an ash hopper, a blowing device and a filter element, and the transition element used in the dust collector is a hardened multi-pleated filter element. There are two implementation modes, one The round hardened multi-pleated filter element is used, and the other is flat hardened multi-pleated filter element. The utility model has the advantages of good dust collection performance, small size, long life, etc., and can be widely used in metallurgy, cement, building materials, chemical industry, light Smoke and dust control in industrial fields such as engineering and machinery.

Description

A bag filter

The utility model belongs to dust removal equipment in the field of environmental protection.

Bag filter is one of the main means of controlling flue gas pollution technology in the field of environmental protection and labor protection. The core component of the bag filter is the filter bag. In the existing bag-type dust collector, the filter materials used in the filter bags are still mainly various flexible filter materials, such as 208 flannelette, needle felt, 729 cloth, glass fiber cloth and glass fiber needle felt. The inside of the filter bag is supported by a skeleton. The main problems of this ordinary bag filter are: the filter area of the filter bag is small, and the number of filter bags used for a bag filter with a certain air volume is large, and the replacement and maintenance workload is large. ;In the process of work and cleaning, due to the wear of the skeleton and filter material, the service life of the filter bag is reduced, generally not more than one year, and the replacement of the filter bag is frequent, which increases the follow-up investment; the filtration speed is low and the resistance of the equipment is large. Since the 1990s, foreign countries have successfully developed a hardened multi-pleated filter element, which has made a breakthrough in bag dust removal technology. It is three times the size of ordinary filter bags, without a skeleton inside, and has a long service life. The bag filter assembled with it is a side-inserted pulse-jet bag filter, which is small in size, about the size of an ordinary bag filter. 1/2. However, this dust removal equipment also has some inherent disadvantages: there are only side-inserted dust collectors assembled from flat filter elements, and there are no various bag dust collectors assembled from circular filter elements. The variety is single, which limits the dust collector. The use range of the filter; and the direction of the pleats of this flat filter element is parallel to the axis of the element, so the cleaning is not thorough enough, so the resistance of the equipment is relatively large; the hardened multi-pleated filter material used is not specially treated, and the fine dust is easy to block the pores of the filter material. Difficult to clean.

The purpose of the utility model is to provide a bag-type dust collector with small volume, large processing capacity, long service life, less maintenance workload and good dust cleaning effect.

The structure of the utility model is basically the same as that of the common bag filter, the main difference lies in the use of hardened multi-pleated filter elements. There are two types of hardened multi-pleated filter elements used: one is a round hardened multi-pleated filter element, and the other is a flat hardened multi-pleated filter element. The direction of the pleats of the flat hardened multi-pleated filter element is perpendicular to the axis of the element. The utility model also has two kinds of embodiments: one is a bag filter adopting a garden-shaped hardened multi-pleat filter element; the other is a bag filter adopting a flat hardened multi-pleat filter element.

Further describe the content of the present utility model below in conjunction with accompanying drawing and embodiment.

Fig. 1 is a structural schematic diagram of a bag filter adopting a garden-shaped hardened multi-pleated filter element,

Figure 2 is a side view of Figure 1,

Figure 3 is a schematic structural view of a bag filter using a flat hardened multi-pleated filter element,

FIG. 4 is a side view of FIG. 3 .

In the figure: 1 lower box body, 2 air inlet on the lower box ash hopper, 3 upper box body, 4 hardened multi-pleated filter element, 5 pulse injection device, 6 air outlet, 7 ash hopper, 8 cover plate , 9 ash outlets, 10 access doors.

The first embodiment of the present utility model is shown in Fig. 1 and Fig. 2: the box body 1 and the upper box body 3 are fixed together by flange connection, and the ash bucket 7 is housed in the lower box body, and there is an ash bucket 7 on the ash bucket 7 The air inlet 2, the top of the upper box body 3 is equipped with a flower plate, and the two ends of the flower plate are fixed on the upper box body. In the hole of the plate, install the hardened multi-pleated filter element in the upper box. There is a pulse injection device 5 at the air purification part above the upper box, which is used to regularly remove the dust settled on the element. The air purification part of the upper box There is an air outlet 6 on the side, which is used to connect with the pipeline and the fan. The dust removed from the filter element exists in the ash hopper and is regularly discharged from the ash discharge port 9. There is an openable cover plate 8 on the top of the upper box. , used to install and replace filter elements. Each row of filter elements in the upper box is equipped with a set of pulse injection devices; each row of filter elements can be composed of 3 to 8, and the number of rows is determined by the processing air volume of the dust collector.

The second embodiment of the utility model is a bag-type dust collector using a flat hardened multi-pleated filter element, its structure is shown in Figure 3 and Figure 4: it is composed of a lower box 1 and an upper box 3, the upper and lower box The bodies are connected and fixed by flanges. An air inlet 2 is set on the upper box to form an upper air intake mode. An air outlet 6 is set on the clean air side of the upper box. There are several dust collectors in the upper box, and each dust removal room is equipped with There is a frame for installing hardened multi-pleated filter elements, and the side of the hardened multi-pleated filter element is inserted on the frame. An inspection door 10 is provided on one side of the dust collector to install or replace the hardened multi-pleated filter element 4, which is inserted on the top The frame of the box body, so the dust collector is a side-inserted flat bag dust collector. At the same time, a pulse injection device 5 is provided on the clean air side to regularly remove the dust deposited on the filter element. The ash outlet 9 below the bucket is discharged.

The dust collection performance of the utility model is better than that of ordinary bag dust collectors and similar domestic products; compared with ordinary bag dust collectors, the volume is reduced by about 1/2, so the application range is wider and steel materials are saved; the number of filter elements used in the dust collector is only ordinary 1/3 of the bag filter, so the maintenance workload is greatly reduced; due to the hardened multi-pleated filter element, the service life is more than 3 times longer than that of ordinary filter bags, thus reducing the cost and workload of replacing filter bags. The following table is a comparison of various pulse jet bag filter:

The utility model can be widely used for dust control in metallurgy, cement building materials, chemical industry, light industry, mechanical processing and other industrial fields.

Embodiment 1: Adopt the bag filter of flat hardened multi-pleated filter element as shown in Fig. 3 to control the smoke and dust of 5 tons of electric furnace. The processing air volume is 600m ³ /min, the dust concentration is 10-20g/m ³ , the flue gas temperature is 80°C, the dust collector is divided into 5 rooms, each room has 16 filter elements, arranged in two rows, 8 in each row, The total number of filter elements is 80. The filter area of the dust collector is 448m ² . The emission concentration is about 10-20mg/m ³ , far below the national emission standard.

Embodiment 2: Adopt the bag-type dust catcher of garden-shaped hardened multi-pleated filter element as shown in Figure 1, control the dust pollution of jaw crusher. The treatment air volume is 600m ³ /h, the dust concentration is 30g/m ³ , 30 round hardened multi-pleated filter elements are used, arranged in 5×6, the filter area of each element is 2.0m ² , and the total filter area is 60m ² , the overall size of the dust collector is 1600×1200×4000mm (length×width×height), pulse jet dust removal, equipment resistance 1200Pa, dust collection efficiency greater than 99.8%, emission concentration less than 30mg/m ³ , far lower than the national Emission Standards.

Claims (5)

1. A bag-type dust collector including an upper box body, a lower box body, an ash hopper, a blowing device, and a filter element, which is characterized in that the filter element used in the dust collector is a hardened multi-pleated filter element, which has two kind: a. The garden-shaped hardened multi-pleated filter element is adopted; b. A flat hardened multi-pleated filter element is used. 2. The bag-type dust collector according to claim 1, characterized in that when the circular hardened multi-pleated filter element is used, the hardened multi-pleated filter element is installed on the flower plate of the upper box through the venturi tube flange at the top. On the top, the clean air part above the upper box is equipped with a pulse injection device, the side of the upper box clean air part has an air outlet, and the top of the upper box is equipped with a cover that can be opened, and each row of filter elements in the upper box Equipped with a set of pulse injection device, the upper box and the lower box are fixed through flange connection, the lower box is equipped with an ash hopper, there is an air inlet on the ash hopper, and an ash discharge port at the bottom of the ash hopper. 3. The bag-type dust collector according to claim 1 or 2, characterized in that each row of said filter elements installed in the upper box can consist of 3-8, and the number of rows is determined by the processing air volume of the dust collector. 4. The bag-type dust collector as claimed in claim 1, characterized in that when a flat hardened multi-pleated filter element is used, an air inlet is provided on the upper box, an air outlet is provided on the clean air side of the upper box, and the upper box is divided into two parts. There are several dust removal chambers, and each dust removal chamber is equipped with a frame for installing filter elements. The flat hardened multi-pleated filter elements are inserted into the frame. There is an inspection door on one side of the dust collector, and a pulse injection device on the clean air side of the upper box. An ash hopper is arranged in the lower box, and an ash discharge port is opened at the bottom of the ash hopper. 5. The bag filter according to claim 1 or 4, characterized in that the direction of the pleats of the flat hardened multi-pleated filter element used in the filter is perpendicular to the axis of the element.

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