CN204973413U - Meticulous dust collector - Google Patents

Abstract

A fine dust removal device belongs to the technical field of combustion product treatment and is used to solve the problem of completely removing small particles of dust in flue gas. The fine dedusting device includes a deduster, an induced draft fan, a desulfurization tower and a chimney connected in sequence, and the dedusting device also includes a water mist dedusting assembly and a circulating water purification device, and the water mist dedusting assembly includes several water mist nozzles and Circulating water pipe, the water outlet end of the circulating water pipe is connected to each water mist nozzle, the water inlet end of the circulating water pipe is connected to the lifting pump of the circulating water purification device, the water mist nozzle is set in the chimney, 3-4 meters away from the bottom of the chimney A mist eliminator is arranged on the upper part of the mist spray head. The utility model can remove large and small dust particles in the flue gas, so that the removal of the flue gas dust reaches the standard. The utility model has the characteristics of less investment, low cost, quick effect, easy realization and the like, and is especially suitable for upgrading and reforming the existing dust removal equipment.

Description

A fine dust removal device

technical field

The utility model relates to an environment-friendly dedusting device, in particular to a fine dedusting device which can completely remove small particles of dust in flue gas, and belongs to the technical field of combustion product treatment.

Background technique

At present, the flue gas produced by coal-fired boilers is usually dedusted by the dust collector and then introduced into the desulfurization tower by the induced draft fan for desulfurization and destocking, and then discharged from the chimney. This method can remove larger dust particles in the flue gas, but there will be a considerable amount of small particle dust in the flue gas discharged into the atmosphere, and these small particle dust will pollute the environment. With the improvement of environmental protection requirements, it has become an urgent problem for smoke and dust emission enterprises to adopt advanced dust removal technology to reduce air pollution and achieve emission compliance. However, dismantling and replacing the original dust removal equipment and upgrading equipment requires a lot of financial support. For most enterprises, this cannot be solved overnight. Therefore, on the basis of the existing dust removal equipment, it is important to meet the pollution discharge requirements through technical transformation Practical significance.

Utility model content

The purpose of the utility model is to aim at the disadvantages of the prior art, to provide a fine dust removal device which has good dust removal effect and realizes dust discharge in flue gas reaching the standard through low-cost investment.

Problem described in the utility model is realized with following technical scheme:

A fine dedusting device, comprising a deduster, an induced draft fan, a desulfurization tower and a chimney connected in sequence, the dedusting device also includes a water mist dedusting assembly and a circulating water purification device, the water mist dedusting assembly includes several water mist nozzles and Circulating water pipe, the water outlet end of the circulating water pipe is connected to each water mist nozzle, the water inlet end of the circulating water pipe is connected to the lifting water pump of the circulating water purification device, the water mist nozzle is set in the chimney, 3-4 meters away from the bottom of the chimney, in the water A mist eliminator is arranged on the upper part of the mist spray head.

The above-mentioned fine dust removal device, the circulating water purification device includes a sedimentation tank and a lifting pump, a quartz sand filter, an activated carbon filter, a precision filter, a clean water tank and a water supply pump connected in sequence by a circulating water pipeline, and the lower part of the chimney communicates with the sedimentation tank .

In the above-mentioned fine dust removal device, the water outlet end of the circulating water pipe is a ring-shaped pipe, 4-6 water mist nozzles are evenly distributed on the ring-shaped pipe, the inner diameter of the chimney is D, and the ring diameter of the ring-shaped pipe is d, D=2d.

The above-mentioned fine dust removal device and the circulating water purification device are also provided with a recoil pipeline, the inlet end of the recoil pipeline is connected to the lifting water pump, and the outlet end of the recoil pipeline is connected with the bottom water inlet of the quartz sand filter and the activated carbon filter respectively. In the working state of the circulating water purification device, the water flow enters from the upper part of the quartz sand filter and the activated carbon filter respectively, and flows out from the lower part of the quartz sand filter and the activated carbon filter; the water flow of the circulating water purification device is filtered by the quartz sand respectively in the recoil state The lower part of the filter and activated carbon filter enters, and the sewage after recoil is discharged from the upper part of the quartz sand filter and activated carbon filter respectively.

The utility model improves the existing dust removal equipment to solve the problem of completely removing small particles of dust in the flue gas, and adds a water mist dust removal component and a circulating water purification device. , the mist water sprayed by the water mist nozzle collides with the small particles of dust in the flue gas. The upward kinetic energy generated by the pressure of the induced draft fan drives the dusty water mist to rise and reach the upper part of the chimney. The kinetic energy is weakened, the concentration of the water mist increases, and the water mist changes. The water droplets carry the dust and fall down, and the dedusted and purified flue gas is discharged from the chimney mouth after passing through the demister. The sewage generated in the dust removal process is fully purified by the circulating water purification device and then recycled. The utility model can remove large and small dust particles in the flue gas, so that the removal of the flue gas dust reaches the standard. The utility model has the characteristics of less investment, low cost, quick effect, easy realization and the like, and is especially suitable for upgrading and reforming the existing dust removal equipment.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

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

Fig. 2 is a schematic diagram of the arrangement of the water mist nozzle.

The list of labels in the figure is: 1. Dust collector, 2. Induced fan, 3. Desulfurization tower, 4. Chimney, 5. Mist eliminator, 6. Water mist nozzle, 7. Sedimentation tank, 8. Lifting water pump, 9. Quartz sand filter, 10. circulating water pipeline, 11. activated carbon filter, 12. fine filter, 13. clean water tank, 14. water supply pump, 15. recoil pipeline.

detailed description

Referring to Fig. 1 and Fig. 2, the utility model includes a deduster 1, an induced draft fan 2, a desulfurization tower 3 and a chimney 4 connected in sequence. The flue gas first enters the dust collector, removes the dust with larger particles, is introduced into the desulfurization tower by the induced draft fan, and then enters the chimney. In order to further remove small particles of dust in the flue gas and realize fine dust removal, the utility model is equipped with a water mist dust removal component. The water mist dedusting assembly includes a water mist nozzle 6 and a circulating water pipeline 10. The water mist nozzle is arranged in the chimney, 3-4 meters away from the bottom of the chimney, and a mist eliminator 5 is arranged on the top of the water mist nozzle. Water mist nozzle. The working principle of the water mist dedusting component is as follows: the mist water sprayed by the water mist nozzle collides with the small particles of dust in the flue gas, and the upward kinetic energy generated by the pressure of the induced draft fan drives the dusty water mist to rise and reach the upper part of the chimney. The kinetic energy is weakened, and the water mist When the concentration increases, the water mist turns into water droplets and falls with dust, and the dedusted and purified flue gas is discharged from the chimney mouth after passing through the demister. In order to ensure that the water mist sprayed by water mist spraying can cover the inside of the chimney, the setting structure of the water mist nozzles is as follows: the water outlet end of the circulating water pipeline 10 adopts a circular pipe, and 4-6 water mist nozzles 6 are evenly distributed in the circular ring. On the tube, the inner diameter of the chimney is D, and the ring diameter of the circular tube is d, D=2d. The illustrated embodiment adopts four water mist nozzles, and the angle of water mist sprayed by each water mist nozzle is 90°.

Referring to Figure 1, in order to continuously provide clean water to the water mist nozzle, the utility model is equipped with a circulating water purification device, which includes a sedimentation pool 7, a lifting pump 8 and a quartz sand filter 9 connected in sequence by a circulating water pipeline , activated carbon filter 11, precision filter 12, clear water tank 13 and water supply pump 14, the chimney bottom is communicated with the sedimentation pool, and the water supply pump is communicated with the water inlet end of the circulating water pipeline. The dedusting sewage produced by dedusting in the chimney is discharged to the sedimentation tank, pumped out by the lifting pump after sedimentation in the sedimentation tank, and then enters the clean water tank after passing through the three-stage filtration of quartz sand filter, activated carbon filter and precision filter, and then passes through the water supply pump 14 is pumped into the circulating water pipeline. The above-mentioned purification process can fully purify the dust-removed sewage and prevent dust particles from clogging the water mist nozzle.

Still referring to Fig. 1, the circulating water purification device is also provided with a recoil pipeline 15, the inlet end of the recoil pipeline is connected to the lifting water pump, and the outlet end of the recoil pipeline is respectively connected to the bottom water inlet of the quartz sand filter and the activated carbon filter. connected. The quartz sand filter and activated carbon filter can be backwashed regularly by using the backflush pipeline. The water flow of the circulating water purification device enters from the upper part of the quartz sand filter and the activated carbon filter respectively in the working state, and flows out from the lower part of the quartz sand filter and the activated carbon filter; the water flow of the circulating water purification device is filtered by the quartz sand respectively in the recoil state The lower part of the filter and activated carbon filter enters, and the sewage after recoil is discharged from the upper part of the quartz sand filter and activated carbon filter respectively.

Claims (4)

1. A fine dust removal device, including a dust collector (1), an induced draft fan (2), a desulfurization tower (3) and a chimney (4) connected in sequence, characterized in that the dust removal device also includes a water mist dust removal assembly and A circulating water purification device, the water mist dedusting assembly includes several water mist nozzles (6) and circulating water pipes (10), the water outlet end of the circulating water pipe is connected to each water mist nozzle, and the water inlet end of the circulating water pipe is connected to the circulating water The lifting water pump (8) of the purification device, the water mist nozzle is arranged in the chimney, 3-4 meters away from the bottom of the chimney, and the mist eliminator (5) is arranged on the top of the water mist nozzle. 2. The fine dust removal device according to claim 1, characterized in that: the circulating water purification device includes a sedimentation pool (7), a lifting pump (8) connected in sequence by a circulating water pipeline, and a quartz sand filter (9) , an activated carbon filter (11), a precision filter (12), a clean water tank (13) and a water supply pump (14), and the lower part of the chimney communicates with the sedimentation tank. 3. The fine dust removal device according to claim 2, characterized in that: the water outlet end of the circulating water pipe is a ring-shaped pipe, 4-6 water mist nozzles are evenly distributed on the ring-shaped pipe, and the inner diameter of the chimney is D, the annular diameter of the circular tube is d, D=2d. 4. The fine dust removal device according to claim 3, characterized in that: the circulating water purification device is also provided with a recoil pipeline (15), the inlet end of the recoil pipeline is connected to the lifting pump, and the outlet end of the recoil pipeline is Connect with the bottom water inlets of the quartz sand filter and activated carbon filter respectively; when the circulating water purification device is working, the water flow enters from the upper part of the quartz sand filter and activated carbon filter respectively, and flows out from the lower part of the quartz sand filter and activated carbon filter ; The circulating water purification device enters the water from the lower part of the quartz sand filter and the activated carbon filter respectively under the recoil state, and the sewage after recoil is discharged from the upper part of the quartz sand filter and the activated carbon filter respectively.