CN210544277U

CN210544277U - Energy-saving tail gas dust removal and desulfurization device

Info

Publication number: CN210544277U
Application number: CN201921074781.3U
Authority: CN
Inventors: 常书峰
Original assignee: Yichang Yafeng Environmental Protection Technology Co Ltd
Current assignee: Yichang Yafeng Environmental Protection Technology Co Ltd
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2020-05-19
Anticipated expiration: 2029-07-10

Abstract

The utility model provides an energy-conserving tail gas dust removal desulphurization unit, including the desulfurization case, at desulfurization case top surface and bottom surface difference fixedly connected with polylith first baffle and polylith second baffle, each first baffle and second baffle are crisscross from top to bottom, interval arrangement in proper order, separate a serpentine channel by polylith first baffle and polylith second baffle in the desulfurization case, serpentine channel both ends switch-on tail gas admission pipe and tail gas discharge pipe respectively, install gear motor at the desulfurization case top, gear motor passes through sprocket chain drive mechanism and is connected with each pivot transmission. When tail gas passes through each group of foaming devices in sequence, each filter plate rotates in the desulfurization liquid, so that a liquid film is formed on filter holes of the filter plates, bubbles are formed in the process that the tail gas passes through the liquid film, and the reaction time and area of the tail gas and the desulfurization liquid are further prolonged by the bubbles, so that the effect of removing sulfides and dust in the tail gas is greatly improved.

Description

Energy-saving tail gas dust removal and desulfurization device

Technical Field

The utility model relates to an energy-conserving tail gas dust removal desulphurization unit.

Background

The existing device for removing dust and desulfurizing tail gas mainly adopts a desulfurizing liquid and sulfur-containing tail gas to mix and react to form granular calcium sulfate so as to remove sulfur-containing substances in the tail gas, but in the existing desulfurizing process, the problems mainly appear in two aspects:

1. the sprayed desulfurization solution is in a liquid drop shape, the contact area with the flue gas is limited, meanwhile, the reaction time with the flue gas cannot be ensured due to the high falling speed of the liquid drop, and the reaction and absorption are insufficient; the foam dust remover with the bottom foaming can not ensure the retention time of the smoke in the foam, so the purification effect is not ideal.

2. The condensate produced by the reaction of the desulfurization solution in the tail gas and the dust in the tail gas are mixed to form sticky sludge which is easy to block fillers, foaming plates, grids and the like.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an energy-conserving tail gas dust removal desulphurization unit for solve the problem in the above-mentioned background.

In order to solve the above problem, the to-be-solved technical scheme of the utility model is:

the utility model provides an energy-conserving tail gas dust removal desulphurization unit, includes the desulfurization case, at desulfurization top surface and bottom surface difference fixedly connected with polylith first baffle and polylith second baffle, each first baffle and second baffle are crisscross from top to bottom, interval arrangement in proper order, separate a serpentine channel by polylith first baffle and polylith second baffle in the desulfurization case, serpentine channel both ends switch-on tail gas admission pipe and tail gas discharge pipe respectively, all seted up the water hole with each second baffle lower extreme, install the foaming device below each first baffle, the foaming device includes the pivot of hub connection in the desulfurization case, fixedly connected with polylith filter plate in the pivot, each filter plate is round pivot axis evenly distributed, installs gear motor at the desulfurization top, gear motor passes through sprocket chain drive mechanism and is connected with each pivot transmission.

The device also comprises a defoaming chamber communicated with one side of the desulfurization box, a third clapboard is fixedly connected to the top surface of the defoaming chamber, the third clapboard separates the defoaming chamber into two chambers with the lower ends communicated with each other, a tail gas discharge pipe is communicated with one chamber far away from the second clapboard, an exhaust fan is installed on the tail gas discharge pipe, an overflow pipe is communicated with one second clapboard close to the defoaming chamber, and the axis of the overflow pipe is higher than the axis of the rotating shaft.

The bottom surface of the desulfurization tank between each two adjacent second partition plates is triangular, the triangular bottom surface of the desulfurization tank is communicated with the filter press through a sludge discharge pipe, the sludge pump is arranged on the sludge discharge pipe, one end of the circulation tank is communicated with one end of the snake-shaped channel close to the tail gas inlet pipe through the liquid inlet pipe, the water pump is arranged on the liquid inlet pipe, the bottom of the defoaming chamber and the clean water outlet of the filter press are communicated with the circulation tank, and the circulation tank is communicated with a liquid supplementing pipe.

The lower end of each second partition plate is fixedly connected with an arc-shaped cover plate coaxial with the rotating shaft, the rotating shaft drives one end of each filter plate to be attached to the cover plate to rotate, and the arc length of the cover plate is larger than or equal to the arc length between one ends of two adjacent filter plates.

The technical effects of the utility model are that:

1. after tail gas entered into the snakelike passageway by the tail gas admission pipe, tail gas circulation route obtained the extension, the flow speed slows down for tail gas desulfurization time obtains the extension, and tail gas is when passing each foaming device of group in proper order simultaneously, and each filter plate is rotatory in the doctor solution, forms the liquid film on making the filter plate filtration pore, and when tail gas passed the liquid film in-process and form the bubble, further extension tail gas and doctor solution's reaction time and area are got by the bubble, thereby make sulphide and the dust in the tail gas get rid of the effect and obtain very big improvement.

2. Because each partition plate rotates around the rotating shaft in real time, the sludge and ash adhered to the filter plate can be washed by the desulfurization liquid, the sludge and ash adhesion probability of the filter plate is reduced, and the filter plate is prevented from being blocked.

Drawings

The invention will be further explained with reference to the drawings:

FIG. 1 is a schematic sectional view of the present invention,

figure 2 is a schematic structural view of the utility model in use,

fig. 3 is a schematic view of the structure of the present invention.

In the figure: the device comprises a circulating liquid tank 1, a liquid inlet pipe 2, a liquid supplementing pipe 3, a water pump 4, a rotating shaft 5, a filter plate 6, an arc-shaped cover plate 7, a tail gas inlet pipe 8, a first partition plate 9, a second partition plate 10, a speed reducing motor 11, an exhaust fan 12, a tail gas discharge pipe 13, a third partition plate 14, a desulfurization tank 15, a defoaming chamber 16, an overflow pipe 17, a slurry pump 18, a sludge discharge pipe 19, a filter press 20, a snake-shaped channel 21, a water through hole 22 and a chain wheel chain transmission mechanism 23.

Detailed Description

As shown in figures 1 to 3, an energy-saving tail gas dedusting and desulfurizing device comprises a desulfurizing box 15, wherein the top surface and the bottom surface of the desulfurizing box 15 are respectively and fixedly connected with a plurality of first partition plates 9 and a plurality of second partition plates 10, each first partition plate 9 and each second partition plate 10 are staggered up and down and are sequentially arranged at intervals, a serpentine channel 21 is separated in the desulfurizing box 15 by the plurality of first partition plates 9 and the plurality of second partition plates 10, two ends of the serpentine channel are respectively communicated with a tail gas inlet pipe 8 and a tail gas outlet pipe 13, the lower end of each second partition plate 10 is provided with a water through hole 22, a foaming device is arranged below each first partition plate 9 and comprises a rotating shaft 5 which is connected in the desulfurizing box 15 by a shaft, a plurality of filter plates 6 are fixedly connected on the rotating shaft 5, the filter plates 6 are uniformly distributed around the axis of the rotating shaft 5, the filter hole diameter of each filter plate 6 is about 5mm, a speed reducing motor 11 is arranged, the speed reducing motor 11 is in transmission connection with each rotating shaft 5 through a chain wheel and chain transmission mechanism 23 so as to drive each filter plate 6 to synchronously rotate in the same direction, and the rotation direction is opposite to the tail gas entering direction.

The utility model discloses a working process and theory of operation do: a desulfurization solution is filled in the desulfurization box 15, the liquid level of the desulfurization solution just overflows the rotating shaft 5, the desulfurization solution contains 2 wt% of NaOH and 2 wt% of sodium dodecyl benzene sulfonate as a surfactant, when the tail gas enters the serpentine channel 21 from the tail gas inlet pipe 8, the tail gas sequentially passes through each group of foaming devices, when the tail gas passes through the foaming device, each filter plate 6 rotates in the desulfurization solution to form a liquid film on the filter holes of the filter plates 6, when bubbles are formed in the process that the tail gas passes through the liquid film, the bubbles are disturbed by the first partition plates 9 and the second partition plates 10 to change the direction of the gas flow so as to increase the flow time of the tail gas, so that the sulfide in the tail gas can fully contact and react with the desulfurization solution, the sulfide is fully purified and the dust is washed, and finally the purified tail gas is discharged from the tail gas discharge pipe 13, wherein the dust in the exhaust gas and the reacted condensate precipitate to the bottom of the desulfurization tank 15 as the filter plates 6 stir and the foam breaks.

The device also comprises a defoaming chamber 16 communicated with one side of the desulfurization box 15, a third partition plate 14 is fixedly connected to the top surface of the defoaming chamber 16, the defoaming chamber 16 is divided into two chambers with the lower ends communicated with each other by the third partition plate 14, a tail gas discharge pipe 13 is communicated with one chamber far away from the second partition plate 10, an exhaust fan 12 is installed on the tail gas discharge pipe, an overflow pipe 17 is communicated with one second partition plate 10 close to the defoaming chamber 16, and the axis of the overflow pipe 17 is higher than that of the rotating shaft 5. When the desulfurization device is used, desulfurization liquid can be continuously poured into the desulfurization box 15, redundant desulfurization liquid is discharged into the chamber through the overflow pipe 17, the liquid level of the desulfurization liquid is kept slightly higher than the axis of the rotating shaft 5 all the time, so that the filter plate 6 can be fully contacted with the desulfurization liquid, and tail gas can penetrate through the filter plate 6; on the other hand, after the exhaust fan 12 is arranged, as shown in fig. 2, the cavity at the right side of the defoaming chamber 16 forms negative pressure, so that the bubbles fed into the cavity at the right side of the defoaming chamber 16 are expanded and broken, and the bubble breaking effect is improved.

The desulfurization device is characterized by further comprising a circulating liquid tank 1, a slurry pump 18 and a filter press 20, the bottom surface of the desulfurization tank 15 between each two adjacent second partition plates 10 is triangular, the triangular bottom surface of the desulfurization tank 15 is communicated with the filter press 20 through a sludge discharge pipe 19, the slurry pump 18 is installed on the sludge discharge pipe 19, one end of the circulating liquid tank 1 is communicated with a snake-shaped channel 21 through a liquid inlet pipe 2 and is close to one end of a tail gas inlet pipe 8, a water pump 4 is installed on the liquid inlet pipe 2, the bottom of the defoaming chamber 16 and a clear water outlet of the filter press 20 are communicated with the circulating liquid tank 1, and a liquid supplementing pipe 3 is. As shown in fig. 1, after a period of use, the tail gas dust and the desulfurization reactant are deposited at the bottom of the desulfurization tank 15 to form slurry, then the slurry pump 18 is started to convey the slurry at the bottom of the desulfurization tank 15 into the plate-and-frame filter press 20, the ash residue obtained by pressure filtration is conveyed to a designated place, the desulfurization solution obtained by pressure filtration is returned to the circulating liquid tank 1 for reuse, and simultaneously, the water pump 4 can be started to continuously convey the desulfurization solution in the circulating liquid middle tank into the desulfurization tank 15 so as to ensure that the liquid level of the desulfurization solution is always slightly higher than the axis of the rotating shaft 5, and the liquid supplementing pipe 3 is used for supplementing the desulfurization solution to the circulating liquid tank 1.

The lower end of each second partition plate 10 is fixedly connected with an arc-shaped cover plate 7 coaxial with the rotating shaft 5, the rotating shaft 5 drives one end of each filter plate 6 to be attached to the cover plate 7 to rotate, and the arc length of the cover plate 7 is larger than or equal to the arc length between one ends of two adjacent filter plates 6. During the rotation of the filter plate 6, the arc-shaped cover sheet 7 can prevent exhaust gas from passing through the gap between the filter plate 6 and the second partition plate 10.

Claims

1. The utility model provides an energy-conserving tail gas dust removal desulphurization unit, includes desulfurization case (15), its characterized in that: the top surface and the bottom surface of the desulfurization box (15) are respectively fixedly connected with a plurality of first partition plates (9) and a plurality of second partition plates (10), each first partition plate (9) and each second partition plate (10) are staggered up and down and are arranged at intervals in sequence, a snake-shaped channel (21) is separated in the desulfurization box (15) by the plurality of first partition plates (9) and the plurality of second partition plates (10), the two ends of the snake-shaped channel (21) are respectively communicated with a tail gas inlet pipe (8) and a tail gas discharge pipe (13), the lower ends of the snake-shaped channel and each second partition plate (10) are respectively provided with a water through hole (22), a foaming device is arranged below each first partition plate (9) and comprises a rotating shaft (5) which is connected in the desulfurization box (15) through a shaft, a plurality of filter plates (6) are fixedly connected on the rotating shaft (5), each filter plate (6) is uniformly distributed around the axis of the rotating shaft (5), and a speed reducing motor (11, the speed reducing motor (11) is in transmission connection with each rotating shaft (5) through a chain wheel and chain transmission mechanism (23).

2. The energy-saving tail gas dedusting and desulfurizing device according to claim 1, characterized in that: still including switch-on room (16) of disappearing in desulfurization case (15) one side, room (16) top surface fixedly connected with third baffle (14) disappear, room (16) are separated to third baffle (14) and two lower extreme chamber of switch-on each other will disappear, tail gas discharge pipe (13) and a chamber switch-on of keeping away from second baffle (10), install air exhauster (12) on tail gas discharge pipe (13), switch-on has overflow pipe (17) on a second baffle (10) that are close to room (16) disappear, overflow pipe (17) axis is higher than pivot (5) axis.

3. The energy-saving tail gas dedusting and desulfurizing device according to claim 2, characterized in that: still include circulation liquid case (1), slush pump (18) and pressure filter (20), desulfurization case (15) bottom surface is triangle-shaped between two adjacent second baffles (10), desulfurization case (15) triangle-shaped bottom surface is through mud pipe (19) switch-on pressure filter (20), install slush pump (18) on mud pipe (19), circulation liquid case (1) one end is close to tail gas admission pipe (8) one end through feed liquor pipe (2) switch-on snakelike passageway (21), install water pump (4) on feed liquor pipe (2), defoaming room (16) bottom and pressure filter (20) clear water discharge port all switch-on with circulation liquid case (1), the switch-on has fluid infusion pipe (3) on circulation liquid case (1).

4. The energy-saving tail gas dedusting and desulfurizing device according to any one of claims 1 to 3, characterized in that: the lower end of each second partition plate (10) is fixedly connected with an arc-shaped cover plate (7) coaxial with the rotating shaft (5), the rotating shaft (5) drives one end of each filter plate (6) to be attached to the cover plate (7) to rotate, and the arc length of the cover plate (7) is larger than or equal to the arc length between one ends of the two adjacent filter plates (6).