CN211245819U - Cloth bag dust removal device for flue gas treatment - Google Patents

Abstract

The utility model discloses a bag dedusting device for flue gas treatment, which has good dedusting effect and can prolong the time of single dedusting. The ash collection area, the smoke inlet area, the diversion area, the dust removal area and the smoke outlet area are set up in sequence from the bottom to the top. , There is a smoke inlet pipe on the smoke inlet area, and the activated carbon injection device includes an activated carbon warehouse, a screw conveyor and a blowing pipe. The discharge end of the blowing pipe is communicated with the smoke inlet pipe. The flow guide area includes a guide shell installed in the dust removal box. The guide shell is provided with a number of vertically arranged guide pipes. The fume hood is suitable for the technical field of flue gas treatment.

Description

A bag dust removal device for flue gas treatment

technical field

The utility model belongs to the technical field of flue gas treatment, in particular to a bag dust removal device for flue gas treatment.

Background technique

The bag dust removal device is a commonly used device in the process of flue gas treatment. The structure of the existing dust removal device is mainly that the cylindrical filter bag is vertically suspended in the dust removal box, and the smoke outlet pipe and the smoke inlet pipe are located on the upper and lower sides of the filter bag respectively. When the flue gas passes through, it plays a filtering role, but it still has some shortcomings. The filter bag is clogged and needs to be cleaned at short intervals, which is more troublesome.

Utility model content

The purpose of the utility model is to provide a bag dedusting device for flue gas treatment, which has good dedusting effect and can prolong the single dedusting time.

The purpose of the utility model is achieved as follows: a bag dust removal device for flue gas treatment, including a dust removal box, characterized in that it also includes an activated carbon injection device, and the dust removal box is provided with ash collection devices arranged in sequence from bottom to top Dust removal area, smoke inlet area, diversion area, dust removal area and smoke outlet area. The dust removal area includes the flower plate installed in the dust box, the frame on the flower plate and the filter bag fixed on the frame. The smoke inlet area is provided with Smoke inlet pipe, activated carbon blowing device includes activated carbon bin, screw conveyor and blowing pipe, the feeding end of the screw conveyor is located below the activated carbon bin, the discharging end of the screw conveyor is connected with the blowing pipe, and the discharging end of the blowing pipe Connected with the smoke inlet pipe, the diversion area includes a guide casing installed in the dust removal box, a number of vertically arranged guide pipes are arranged in the guide casing, and a smoke inlet hood is also arranged in the smoke inlet area. The smoke inlet pipes are communicated through the smoke inlet hood, and the bottom of the smoke inlet hood is provided with an ash outlet which is communicated with the ash collecting area.

By adopting the above technical solution, the principle of the activated carbon injection device is as follows: the activated carbon particles in the activated carbon bin enter the blowing pipe regularly and quantitatively through the screw conveyor, and the blowing pipe blows the activated carbon particles into the smoke pipe through the fan; When flowing in the smoke pipe, due to the blowing of the activated carbon particles, the activated carbon particles are scattered in the air flow by the flue gas flow, and they are in contact with the smoke inlet pipe and the guide pipe for a long time to perform adsorption and filtration, and absorb heavy metals and dioxins. Ying's activated carbon particles are finally attached to the wall of the filter bag, and can continue to absorb heavy metals and dioxins in the flue gas, and then fall into the ash collection area when cleaning the dust, and discharge together with the dust in the dust removal box; the dust removal box The internal principle is: after the flue gas enters the dust removal area from the diversion area, it is filtered through the filter bag and then discharged from the smoke outlet area through the through holes on the flower plate. A turbulent flow is formed in the dust box, which guides the airflow, that is, the sufficient contact time between the flue gas and the activated carbon particles is improved through the setting of the guide pipe, and the dust impurities and the guide pipe are in the process of rising of the flue gas flow. The collision and friction between them will make the dust fall in advance and reduce the possibility of the dust directly adhering to the surface of the filter bag. The setting of the fume hood can prevent the dust that has fallen in the fume collecting area from being affected by the airflow and re-mixing into the flue gas. , improve the final dust removal effect and prolong the single dust removal time.

The utility model is further arranged as follows: a smoke outlet pipe is arranged on the smoke outlet area, and a dust blowing pipe is also arranged in the smoke outlet area.

By adopting the above technical solution, the dust blowing pipe is also connected to the fan. After a period of use, the smoke inlet pipe and the smoke outlet pipe are closed, and the ash outlet pipe is opened to blow air, so as to remove the dust on the wall of the filter bag and the dust on the wall of the guide pipe. Blowing into the ash collection area can play the role of dust removal and cleaning on the filter bag.

The utility model is further provided that: the blowing direction of the blowing pipe and the smoking direction of the smoke inlet pipe are arranged in the same direction.

By adopting the above technical solution, that is, the section connecting the smoke inlet pipe and the dust box can be an L-shaped pipe, and the air blowing pipe is connected to the corner of the smoke inlet pipe, so that the blowing direction of the blowing pipe is in the same direction as that of the smoke inlet pipe. It is convenient for the activated carbon particles to flow directly with the flue gas flow and improve the adsorption function.

The utility model is further arranged as follows: the fume inlet hood has an inverted cone-shaped structure.

By adopting the above technical solution, that is, the lower end of the fume inlet hood is a small end, and the dust can slide down with the inner wall of the fume hood after falling into the fume hood, and finally fall into the ash hopper from the ash outlet.

The utility model is further arranged as follows: the ash collecting area includes an ash hopper arranged at the bottom of the dust box, the bottom of the ash hopper is provided with an ash outlet pipe, and the ash outlet pipe is provided with an ash discharge valve.

By adopting the above technical solution, the ash hopper is convenient to collect dust, and the ash discharge valve is convenient to control the stop of the ash outlet pipe, which is closed during the flue gas dedusting process and opened during the ash cleaning process.

The utility model is further arranged as follows: the smoke inlet pipe and the smoke outlet pipe are both provided with control valves.

By adopting the above technical solution, the control valve is used to control the stop of the smoke inlet pipe and the smoke outlet pipe.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

Fig. 2 is the structural representation of activated carbon injection device in the present utility model;

The reference signs in the figure are: 1, flower plate; 2, frame; 3, filter bag; 4, smoke inlet pipe; 5, activated carbon bin; 6, screw conveyor; 7, blowing pipe; 8, guide shell; 9 10. Intake hood; 11. Ash outlet; 12. Smoke outlet; 13. Dust blowing pipe; 14. Ash hopper; 15. Ash outlet; 16. Control valve.

Detailed ways

Below in conjunction with the accompanying drawings, the present utility model will be further described with specific embodiments, referring to Fig. 1-2:

A bag dust removal device for flue gas treatment, comprising a dust removal box, characterized in that it also includes an activated carbon injection device, and the dust removal box is provided with an ash collection area, a smoke inlet area, a diversion area, Dust removal area and smoke outlet area. The dust removal area includes a flower plate 1 installed in the dust box, a frame 2 installed on the flower plate 1 and a filter bag 3 fixed on the frame 2. The smoke inlet area is provided with a smoke inlet pipe 4. The activated carbon injection device includes an activated carbon warehouse 5, a screw conveyor 6 and a blowing pipe 7. The feed end of the screw conveyor 6 is located below the activated carbon warehouse 5, and the discharge end of the screw conveyor 6 is communicated with the blowing pipe 7. The blowing pipe 7 The discharge end is connected with the smoke inlet pipe 4, the diversion area includes a diversion shell 8 installed in the dust removal box, the diversion shell 8 is provided with a number of vertically arranged diversion pipes 9, and the smoke inlet area is also provided with In the fume inlet hood 10, the guide pipe 9 and the fume inlet pipe 4 are communicated through the fume inlet hood 10, and the bottom of the fume inlet hood 10 is provided with an ash outlet 11 which communicates with the ash collecting area.

By adopting the above technical solution, the principle of the activated carbon injection device is as follows: the activated carbon particles in the activated carbon bin 5 are regularly and quantitatively fed into the blowing pipe 7 through the screw conveyor 6, and the blowing pipe 7 blows the activated carbon particles into the smoke pipe 4 through the fan ; That is, when the flue gas flows in the smoke inlet pipe 4, due to the blowing of the activated carbon particles, the activated carbon particles are scattered in the air flow by the flue gas flow, and are in contact with the smoke inlet pipe 4 and the guide pipe 9 for a long time. Adsorption and filtration, and the activated carbon particles that adsorb heavy metals and dioxins are finally attached to the wall of the filter bag 3, and can continue to absorb heavy metals and dioxins in the flue gas, and then fall into the ash collection area when cleaning the dust. The ash in the dust removal box is discharged together; the principle inside the dust removal box is: after the flue gas enters the dust removal area from the diversion area, it is filtered through the filter bag 3 and then enters the smoke outlet area through the through hole on the pattern plate 1 and discharged; The arrangement of the flow pipe 9 and the fume inlet hood 10 can prevent the flue gas from forming turbulent flow in the dust removal box, and play a guiding role in the airflow, that is, the arrangement of the guide pipe 9 improves the sufficient contact time between the flue gas and the activated carbon particles. , and during the rising process of the flue gas flow, the collision and friction between the dust impurities and the guide pipe 9 will cause the dust to fall in advance, reducing the possibility of the dust directly adhering to the surface of the filter bag 3. Through the setting of the fume inlet hood 10, It can prevent the dust that has fallen in the smoke collecting area from being re-mixed into the flue gas due to the influence of the airflow, improving the final dust removal effect and prolonging the single dust removal time.

The utility model is further configured as follows: a smoke outlet pipe 12 is arranged on the smoke outlet area, and a dust blowing pipe 13 is also arranged in the smoke outlet area.

By adopting the above technical solution, the dust blowing pipe 13 is also connected to the fan. After a period of use, the smoke inlet pipe 4 and the smoke outlet pipe 12 are closed, and the ash outlet pipe 15 is opened to blow air, so as to remove the dust on the wall of the filter bag 3 and divert the flow. The dust on the wall of the pipe 9 is blown into the ash collecting area, that is, the filter bag 3 can be dedusted and cleaned.

The present utility model is further configured as follows: the blowing direction of the blowing pipe 7 and the smoking direction of the smoke inlet pipe 4 are arranged in the same direction.

By adopting the above technical solution, that is, the section of the smoke inlet pipe 4 connected with the dust box can be an L-shaped pipe, and the blowing pipe is connected with the corner of the smoke inlet pipe 4, so that the blowing direction of the blowing pipe 7 is connected with the smoke inlet of the smoke inlet pipe 4. The directions are in the same direction, so that the activated carbon particles can flow directly with the flue gas flow and improve the adsorption function.

The utility model is further configured as follows: the fume inlet hood 10 has an inverted cone-shaped structure.

By adopting the above technical solution, that is, the lower end of the fume inlet hood 10 is a small end, after the dust falls into the fume hood 10, it can slide down with the inner wall of the fume inlet hood 10, and finally fall into the ash hopper 14 from the ash outlet 11.

The utility model is further configured as follows: the ash collecting area includes an ash hopper 14 placed at the bottom of the dust box, the bottom of the ash hopper 14 is provided with an ash outlet pipe 15, and the ash outlet pipe 15 is provided with an ash discharge valve.

By adopting the above technical scheme, the ash hopper 14 is convenient for collecting dust, and the ash discharge valve is convenient for controlling the blocking of the ash outlet pipe 15, which is closed during the flue gas dedusting process and opened during the ash cleaning process.

The utility model is further configured as follows: the smoke inlet pipe 4 and the smoke outlet pipe 12 are both provided with a control valve 16 .

By adopting the above technical solution, the control valve 16 is used to control the shut-off of the smoke inlet pipe 4 and the smoke outlet pipe 12 .

The above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore: all equivalent changes made according to the structure, shape and principle of the present invention shall be covered by the present invention. within the scope of protection of the utility model.

Claims (6)

1. A bag dedusting device for flue gas treatment, comprising a dedusting box, characterized in that: also comprising an activated carbon injection device, and the dedusting box is provided with an ash collecting area, a smoke inlet area, a diversion area that are arranged in sequence from bottom to top The dust removal area includes a pattern plate (1) installed in the dust box, a frame (2) installed on the pattern plate (1), and a filter bag (3) fixed on the frame (2). , a smoke inlet pipe (4) is arranged on the smoke inlet area, and the activated carbon injection device includes an activated carbon bin (5), a screw conveyor (6) and a blowing pipe (7). The feed end of the screw conveyor (6) is located at Below the activated carbon bin (5), the discharge end of the screw conveyor (6) is connected with the blowing pipe (7), and the discharge end of the blowing pipe (7) is connected with the smoke inlet pipe (4). A guide casing (8) in the box, a plurality of vertically arranged guide pipes (9) are arranged in the guide casing (8), and a smoke inlet hood (10) is also arranged in the smoke inlet area, and the guide pipes (9) ) and the smoke inlet pipe (4) are communicated through the smoke inlet hood (10), and the bottom of the smoke inlet hood (10) is provided with an ash outlet (11) which is communicated with the ash collecting area. 2. The bag dust removal device for flue gas treatment according to claim 1, characterized in that: a smoke outlet pipe (12) is arranged on the smoke outlet area, and a dust blowing pipe (13) is also arranged in the smoke outlet area. ). 3 . The bag dust removal device for flue gas treatment according to claim 1 , wherein the blowing direction of the blowing pipe ( 7 ) is arranged in the same direction as that of the smoke inlet pipe ( 4 ). 4 . 4 . The bag dust removal device for flue gas treatment according to claim 1 , wherein the fume inlet hood ( 10 ) has an inverted cone-shaped structure. 5 . 5 . The bag dust removal device for flue gas treatment according to claim 1 , wherein the ash collecting area comprises an ash hopper ( 14 ) placed at the bottom of the dust box, and the bottom of the ash hopper ( 14 ) is provided with an outlet 5 . The ash pipe (15) and the ash discharge pipe (15) are provided with an ash discharge valve. 6. A bag dust removal device for flue gas treatment according to claim 2, characterized in that: a control valve (16) is provided on the smoke inlet pipe (4) and the smoke outlet pipe (12).

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