CN201632155U - Long bag low pressure bag filter - Google Patents

Abstract

A long-bag low-pressure bag-type dust collector, which relates to an environment-friendly dust removal equipment. The box body of the dust collector includes an upper box body, a middle box body, and an ash hopper. There are multiple bag rooms in the box space formed by the box. Filter bags are placed in the bag rooms, and the top has a bag opening. It also includes ash cleaning device, ash unloading device and control system installed in the dust collector box. The control system controls the cleaning. The opening and closing of the ash device and the ash unloading device; the connection between the middle box and the ash hopper is made with an air inlet, and the top of the upper box is equipped with an air outlet and an exhaust hole. The tuyere is connected with the induced draft fan, and the purified gas is discharged into the atmosphere, and the wind dust is blocked outside the filter bag; the dust cleaning device and the dust unloading device are composed of a poppet valve, an electromagnetic pulse valve and a blowing pipe, which are respectively electrically connected to the control system . The beneficial effect is that the dust collector adopts the off-line or on-line bag-by-bag dust cleaning method, which has good dust removal effect, high dust removal efficiency, and low emission concentration. It also has large processing air volume, reliable operation, convenient maintenance, reasonable structure, and low running resistance. Small footprint.

Description

Long bag low pressure bag filter

technical field

The utility model relates to an environment-friendly dedusting device, which is mainly used for a long-bag low-pressure bag-type deduster for processing a large amount of dust-laden airflow for dust collection.

Background technique

my country is a big country in cement production and consumption, and its cement output accounts for more than half of the world. With the gradual adjustment of my country's cement industry and the continuous implementation of the policy of changing from large to small, a large number of backward process equipment are gradually eliminated, and large-scale and intensified become Direction of development. Dust emission from the cement industry is an important cause of air pollution. Although at present, at the kiln head, kiln tail and other dust discharge points in the cement industry, glass fiber bag dust collectors are usually used to deal with large air volume dust collection, but due to the low filtration wind speed of glass fiber bag dust collectors, generally 0.4 to 0.5 m/s, resulting in large volume, large floor space and high investment of the entire dust collector. In addition, it uses back blowing shrink bag to clean dust, which brings extra load to the dust collector itself, and also affects the service life of the filter bag, which limits its own development of. On the other hand, if the high-voltage pulse bag filter is used, although it has a good effect, it is not conducive to the energy saving and consumption reduction of the enterprise because of the large kinetic energy required and high energy consumption. Therefore, it is very necessary to study a bag filter with low-pressure pulse cleaning and long bag structure.

Utility model content

The technical problem to be solved by the utility model is to provide a long-bag low-pressure bag-type dust collector based on the pulse jet (Jet Puise) dust removal technology to meet the needs of large-volume flue gas.

The technical scheme that the utility model adopts for solving technical problems is,

A long-bag low-pressure bag-type dust collector, characterized in that: the box of the dust collector includes an upper box, a middle box and an ash hopper, the ash hopper is arranged at the lower part of the middle box, and the upper box and the middle box A plurality of bag chambers are arranged in the box body space formed by the box body, and filter bags are placed in the bag rooms, and a bag opening is opened on the top. An air outlet and an air vent are arranged, and the air outlet, the bag mouth of the bag chamber and the air outlet are connected with the induced draft fan, and the purified gas is discharged into the atmosphere, and the dust is blocked outside the filter bag.

It also includes a dust removal device, a dust discharge device and a control system arranged in the dust collector box. The control system controls the opening and closing of the dust removal device and the dust discharge device. The dust removal device and the dust discharge device are controlled by a poppet valve, an electromagnetic pulse The valve and the blowing pipe are formed, and are respectively electrically connected to the control system, and the electromagnetic pulse valve is also electrically connected to the blowing pipe.

The poppet valve is arranged on the upper part of each bag chamber and is connected with the bag mouth to close the bag mouth and cut off the filtered air flow in the bag chamber. After the compressed air, the electromagnetic pulse valve blows The nozzle sprays into the filter bag.

The blowing pipe is made of seamless steel pipe.

The control system is a dust removal controller.

The working principle of the utility model is that the dust-laden flue gas enters the ash hopper through the air inlet through the lower part of the middle box, and some larger dust particles fall directly into the ash hopper due to inertial collision, natural settlement, etc., and other dust particles rise with the gas. After entering each bag room, after being filtered by the filter bag, the purified gas is discharged into the atmosphere from the inside of the filter bag through the bag mouth, exhaust hole, and air outlet by the induced draft fan, and the dust is blocked outside the filter bag. As the filtration continues, the dust accumulated on the outside of the filter bag continues to increase, which leads to a gradual increase in the resistance of the dust collector itself. When the resistance reaches a certain value, the dust cleaning controller sends out a signal to firstly make the dust collector in a bag room The poppet valve is closed to cut off the filtered air flow in the chamber, then the electromagnetic pulse valve is opened, and the compressed air is sprayed into the filter bag in a very short time (0.2-0.3 seconds) through the air bag, the pulse valve, and the injection nozzle on the injection pipe, compressing The air expands at a high speed in the filter bag, which causes the filter bag to produce high-frequency vibration and deformation, and the effect of the reverse air flow causes the dust cake attached to the outside of the filter bag to deform and fall off. After fully considering the dust settling time (to ensure that the fallen dust can effectively fall into the ash hopper), the lifting valve of the bag room is opened, the bag room returns to the filtering state, and the next bag room enters the dust cleaning state. This goes on and on until the cleaning of the last baghouse is completed.

The beneficial effect of the utility model is that the dust remover adopts the off-line or on-line bag-by-bag blowing dust removal method, which has good dust removal effect, high dust removal efficiency, and low emission concentration. At the same time, it also has large processing air volume, reliable operation, convenient maintenance and reasonable structure. , low running resistance, small footprint, etc., can be widely used in large-volume flue gas purification in metallurgy, steel, electric power, chemical industry, machinery, building materials and other industries.

Description of drawings

Fig. 1 is the schematic diagram of the whole machine structure of the utility model.

Fig. 2 is a schematic side view of Fig. 1;

Fig. 3 is a schematic structural view of the top of the upper box;

Fig. 4 is a schematic side view of Fig. 3;

Fig. 5 is a schematic diagram of the structure of the blowing pipe in Fig. 3 .

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific illustrations.

As shown in Figure 1 and Figure 2, a long bag low-pressure bag dust collector 1, the outer box of the dust collector 1 includes an upper box 11, a middle box 12 and an ash hopper 13, and the ash hopper 13 is arranged in the middle box The bottom of 12 is divided into a plurality of bag rooms in the space formed by the upper box body 11 and the middle box body 12, and a filter bag is placed in the bag room, and a bag opening (not shown) is opened on the top, and in the middle box body 12 and The joint of the ash hopper 13 is formed with an air inlet hole 14, and the top of the upper box body 11 is equipped with an air outlet and an air outlet. Atmosphere, wind dust is blocked outside the filter bag.

As shown in Figure 1 and Figure 3-5, it also includes a dust removal device, an ash unloading device and a control system arranged in the dust collector 1 box. The control system controls the opening and closing of the ash removal device and the ash unloading device. The control system is The dust removal controller, the dust removal device and the dust discharge device are composed of a poppet valve 15, an electromagnetic pulse valve and a blowing pipe 16. The pulse valve and the blowing pipe 16 are electrically connected to the control system, and the electromagnetic pulse valve and the blowing pipe 16 are also electrically connected.

Each poppet valve 15 is installed on the upper part of each bag chamber, and connected with the mouth of the bag to close the mouth of the bag and cut off the filtered air flow in the bag chamber. The spray nozzle sprays to the filter bag. Compressed air expands at a high speed in the filter bag, causing high-frequency vibration and deformation of the filter bag, coupled with the effect of reverse air flow, the dust cake attached to the outside of the filter bag is deformed and falls off, and when the dust is fully settled, the dust that falls off is guaranteed It can effectively fall into the ash hopper, the poppet valve 15 of the bag room is opened, the bag room returns to the filtering state, and the next bag room enters the ash cleaning state, and so on until the last bag room is cleaned and used alternately.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (3)

1. one kind long bag low pressure sack cleaner, it is characterized in that: the casing of described deduster comprises upper box body, middle part casing and ash bucket, ash bucket is arranged on the bottom of middle part casing, in the cabinet space of upper box body and middle part casing formation, a plurality of bags of chambers are set, the indoor placement filter bag of bag, the top has sack, also comprises the deashing device, ash-discharging device and the control system that are arranged in the deduster casing, the opening and closing of control system control deashing device and ash-discharging device;

The junction of described middle part casing and ash bucket is shaped on fresh air inlet, the top of described upper box body sets out air port and steam vent, the sack of described steam vent, bag chamber links to each other with air-introduced machine with air outlet, will purify back gas and enter atmosphere, and travel fatigue is delayed at the filter bag outside;

Described deashing device and ash-discharging device are made of lift valve, electromagnetic impulse valve and winding-up pipe, are electrically connected respectively and between the control system.

2. according to the described long bag low pressure sack cleaner of claim 1, it is characterized in that: described lift valve is arranged on the top of each bag chamber, and is connected into together mutually with sack.

3. according to the described long bag low pressure sack cleaner of claim 1, it is characterized in that: described control system is the deashing controller.

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