CN2736049Y

CN2736049Y - Smoke gas purifying device

Info

Publication number: CN2736049Y
Application number: CN 200420070434
Authority: CN
Inventors: 何景润
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-26
Filing date: 2004-08-26
Publication date: 2005-10-26
Anticipated expiration: 2014-08-26

Abstract

The utility model relates to a smoke gas purifying device which is provided with a computer automatic-controlled desulphurization powder air spout. The hollow axle of the washing cylinder is provided with a continuous one piece or intermittent separated helical fan lamina and a spiral line-shaped distributed water spout which is pipe column-shaped or round hole-shaped, or both. The flocculation tank is provided with a flocculant adding inlet on the top, a rabble in the tank, a magnetic valve at the lower part of the tank, and a screen cloth band filter which is 0-8 DEG tilted with the horizon line. At the run-time, the sulfur dioxide is cured into granules by chemical means, and the granules enters the smoke line. The smoke gas is aspirated into the washing cylinder which is water-supplied by the hollow axle. The clean water which is changed into wastewater after dedusting, enters into the flocculation tank and forms deposition contamination. The wastewater is changed to clean water after filtering, and the contamination and clean water are recovered and re-used respectively. The dust abatement and desulphurization of this device both achieve the national standard, and the cost of basic construction and operation is decreased.

Description

Flue gas purifying device

Technical Field

The utility model relates to a gas purification, fluid filtration field, especially flue gas purification device.

Technical Field

The smoke pollutes the atmosphere, and people have many solutions for years, but the smoke is ubiquitous, has complex technology and high price or has unsatisfactory effect. The Chinese patent publication No. CN2038200u discloses a rotary water-jet type smoke and dust eliminating device, which has a rotary hollow shaft in the cylinder, fan blades and a water nozzle on the shaft, and the smoke is sucked into the cylinder for wet dust removal. Although the device has good dust removal efficiency, the device has to be maintained by adopting large water consumption, the generated sewage is excessive, the floor area of a sewage pool is too large, and the operation cost is high. Chinese patent publication No. CN2294769y discloses a complete set of exhaust gas purification device, which has ring-shaped pipe fittings for injecting high-pressure gas and high-pressure liquid and a sewage separation device using slag as a filter layer on the inner wall of a flue and the inner wall of a cylinder. The device has good dust removal effect, but needs an air compressor for producing high-pressure gas; although the device has a slag filtering layer, the device can not completely separate the precipitated dirt, and the waste water and the precipitate are difficult to recycle, thereby causing high operation cost.

Disclosure of Invention

The utility model provides a flue gas purification device can realize consuming water fewly, deposits filth and water thorough separation in the sewage, and sewage becomes clear water, saves the effluent water sump, saves air compressor, but bothrecycle of waste water and smoke and dust precipitate reduces the working costs to harmful substance sulphur in the desorption flue gas.

Flue gas purification device, characterized by: two spiral lines are arranged on a hollow shaft of the washing cylinder, a fan spiral blade is arranged on one spiral line, water nozzles with equal distance are arranged on the other spiral line, and a sewage discharge port is arranged on the lower side wall of the washing cylinder and communicated with the top end of the flocculation tank; a flocculating agent feeding port is arranged at the top end of the flocculation tank, a stirring rake is arranged in the flocculation tank, and an electromagnetic valve for controlling the drainage of flocculated sewage fluid is arranged at the lower end of the flocculation tank; a screen mesh belt type filter is arranged right below the electromagnetic valve, the tail part of the filter is higher than the head part of the filter, and the plane of the screen mesh and the horizontal line form an inclined angle of 0-8 degrees; the flue is provided with a calcium oxide powder funnel for desulfurization, and the lower end of the funnel is provided with a calcium oxide powder nozzle extending into the flue.

The fan helical blades on the hollow shaft are continuous and integrated or are discontinuously and separately arranged; the water spray nozzles on the spiral line of the hollow shaft are in a pipe column shape or a circular hole shape or are distributed at intervals between the pipe column shape and the circular hole shape.

A flue gas purifier, ① a fan spiral blade and a water nozzle, wherein the spiral blade and the water nozzle are distributed on a hollow shaft, and in the rotation motion, both water drops and smoke dust particles are in spiral motion, so that the water drops have more chance and the smoke dust particles are more effectively knocked down, the water nozzleadopts a round hole-shaped and pipe-column-shaped spaced structure, the pipe-shaped water nozzle has larger linear velocity and stroke when the water drops are sprayed out, so that the capacity of the water drops to effectively knock down the smoke dust particles is improved, ② has the effect of ①, so that water is saved, sewage is reduced, the burden of a sewage treatment link is reduced, ③ treats the sewage with a flocculating agent again, so that the sewage is flocculated and precipitated to form a sewage flocculating fluid, the precipitated flocculating fluid is effectively separated from water by a screen belt filter, ④ has the effect of ③, so that the water is clear, a sewage pool is saved, the dewatered flocculating fluid becomes viscous sewage, the viscous sewage is separated from clean water, the viscous sewage is respectively recycled, the construction and operation cost is reduced, and ⑤ the harmful sulfur pollution in the flue gas is reduced by adopting a desulfurization device.

Drawings

FIG. 1 is a schematic diagram of the construction of a flue gas cleaning device;

fig. 2 is a view of the screen belt filter of fig. 1 in the direction of direction a.

Detailed Description

The air cleaning equipment is characterized by that on the flue 13 a calcium oxide powder funnel 9 for desulfurization is mounted, and the lower end of said funnel is equipped with a powder nozzle 10 extended into the flue, said nozzle is automatically controlled by computer, and according to the measured content of sulfur material in the flue gas the spray quantity of calcium oxide powder can be automatically controlled. When in work, sulfur substances in the smoke and the calcium oxidepowder agent are subjected to chemical reaction, namely So that the sulfur is solidified into small particles to enter the flue gas.

The length of the washing cylinder 3 is 1700mm, the diameter is 1300mm, the inner lining surface adopts the anticorrosive coating 2, the diameter of the hollow shaft 4 is 85mm, the shaft 4 is movably and hermetically connected with the two ends of the washing cylinder 3, and the right end of the hollow shaft 4 outside the washing cylinder 3 is movably and hermetically connected with the water supply pipe 7. The diameters of the tubular column-shaped water spray nozzles 6 and the circular hole-shaped water spray nozzles 6 'are both 2mm, and the tubular column-shaped water spray nozzles 6 and the circular hole-shaped water spray nozzles 6' are distributed at intervals. The washing drum motor 23 is 7.5kw, and the rotational speed of the hollow shaft 4 is 2900 revolutions per minute. The outlet end of the flue 13 is communicated with the right end of the washing drum 3, and the axis of the outlet end of the flue 13 is one half of the radius of the washing drum 3. When the device is operated, water is supplied to the hollow shaft 4 by the water supply pipe 7, the hollow shaft rotates as shown by an arrow in figure 1, the smoke is sucked into the washing cylinder 3 from the flue 13, water sprayed from the water spray nozzles 6 and 6' is beaten into water drops and makes spiral motion together with the smoke, and then, smoke dust solid particles in the smoke are knocked down into the water by the water drops, so that clean water is changed into sewage and falls to the lower part of the washing cylinder 3; and a trace amount of residual flue gas and water vapor are discharged into the atmosphere from a chimney 1 at the left side of the washing cylinder 3.

A flocculation tank 15 is arranged below the washing cylinder 3 and is communicated with a sewage discharge outlet 22 of the washing cylinder 3, a flocculating agent inlet 21 is arranged at the upper end of the flocculation tank, and a stirring rake 17 is arranged in the flocculation tank and is driven by a motor 20. The lower end of the flocculation tank is provided with an electromagnetic valve 16 for controlling the drainage of the flocculated sewage fluid. When the device works, sewage in the washing cylinder 3 flows into the flocculation tank 15 from the sewage discharge port 22, a flocculating agent is added from a flocculating agent inlet 21, the stirring rake 17 in the flocculation tank is driven by the motor 20 to stir slowly, and at this time, a flocculated sewage fluid is formed in the sewage and is precipitated to the bottom.

Directly below the electromagnetic valve 16 of the flocculation tank is a screen belt filter 19, the tail of which is higher than the head, and the screen plane is at an angle of inclination of 7 degrees to the horizontal. At the end of the filter 19 is a bag 18 for receiving dirt. When the motor 24 drives the mesh belt filter 19, the electromagnetic valve 16 is opened, the dirt fluid in the flocculation tank falls on the head of the right end of the mesh belt filter for filtration, the flocculated dirt fluid is dehydrated to become viscous dirt, and the dirt falls into the packaging bag 18 for receiving the dirt for recycling when being slowly transmitted to the tail of the left end of the filter 19. The filter 19 has an inclined angle, so that dehydration is facilitated and dirt is easy to separate from the screen surface.

A wastewater recovery tank 14 is arranged below the screen belt filter, and wastewater filtered from the sewage fluid is changed into clear water and falls into the wastewater recovery tank 14.

A water return pipe 12 is arranged between the waste water recovery tank 14 and the water storage tank 8 and is communicated with a water pump11, and when the water pump 11 operates, clean water in the waste water tank 14 is pumped into the water storage tank 8 by the water pump 11 to realize the recycling of waste water.

Claims

1. Flue gas purification device, including hollow shaft, fan blade, water spout, filter, its characterized in that:

two spiral lines are arranged on a hollow shaft (4) of the washing cylinder (3), one of the spiral lines is provided with a fan spiral blade (5), and the other spiral line is provided with water nozzles (6) which are distributed at equal intervals;

a sewage discharge outlet (22) is arranged on the lower side wall of the washing cylinder (3) and is communicated with the top end of the flocculation tank (15), a flocculating agent inlet (21) is arranged at the top end of the flocculation tank (15), a stirring rake (17) is arranged in the flocculation tank (15), and a flocculated sewage fluid discharge electromagnetic valve (16) is arranged at the lower end of the flocculation tank (15);

a screen belt type filter (19) is arranged right below the electromagnetic valve (16), the tail part of the filter is higher than the head part of the filter, and the screen surface and the horizontal line form an inclined angle of 0-8 degrees;

a calcium oxide powder funnel (9) is arranged on the flue (13), and a calcium oxide powder agent nozzle (10) extending into the flue (13) is arranged at the lower end of the funnel.

2. The flue gas purification device according to claim 1, wherein:

on the hollow shaft (4), the fan helical blades (5) are continuous and integrated or are discontinuously and separately arranged.

3. The flue gas purification device according to claim 1, wherein:

the water nozzles distributed equidistantly on the spiral line of the hollow shaft (4) are in a pipe column shape (6), or in a circular hole shape (6 '), or are distributed at intervals between the pipe column shape (6) and the circular hole shape (6').