CN2326318Y

CN2326318Y - Flue-gas desulfurizing and dust-removing apparatus

Info

Publication number: CN2326318Y
Application number: CN 98200610
Authority: CN
Inventors: 陈火其
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-14
Filing date: 1998-01-14
Publication date: 1999-06-30
Anticipated expiration: 2008-01-14

Abstract

The utility model relates to a fume-gas desulfurizing and dust-removing apparatus, which is provided with a screw case (11). The periphery is provided with an inlet (17). The center is provided with an outlet pipe (13). The utility model is characterized in that the screw case (11) screw passages, conical bottom case (10) and a desulfurizing cavity (7). The screw passages have the same width in a radial direction. A liquid sparging pipe (9) is arranged at the inner part of the desulfurizing cavity. The utility model is provided with a fume-gas inlet (16) and an outlet. The outlet is communicated with the inlet (17) of the screw case. Liquid sparging pipes (12) are uniformly distributed from the inlet to 3/4 length at the center of the screw passage. The fume-gas is desulfurized by purged liquor in the desulfurizing cavity. The fume-dust is precipitated. The fume-gas is washed in the screw passage. A water film is formed on the side wall to desulfurize and remove dust. The fume-gas is carried out dehydration at the rear segment of the screw passage. So the desulfurization and dust removal efficiency is high; the dehydration effect is favorable.

Description

Desulfurating dust removing device for flue gas

The utility model relates to the removing or the processing of combustion products or combustion residue, flue, the particularly device of processing cigarette or waste gas.

China's industrial fuel contains volume of smoke and sulfur dioxide in the flue gas that coal produces, for preventing atmosphere pollution now still based on coal when burning, flue gas needs could discharge behind desulfurization and dedusting, and used processing method has water film dedusting, cyclone dust removal, electrostatic precipitation, cyclone dust removal and electrostatic precipitation all can only dedustings and can not desulfurization, the cost height, water film dedusting commonly used as numb stone dedusting, volume is big, efficient is low, and effect is bad, and is therefore all undesirable.

China's utility model patent scroll casing shape water membrane smoke purification device " discloses the water membrane smoke purification device that a kind of flue gas flue is scroll casing shape; have the scroll casing shape housing; there is axial sleeve pipe in central authorities; helical channel is arranged in the housing; the inlet of helical channel is positioned at the housing periphery; outlet is at axial sleeve pipe place, the outer wall of helical channel is the working face with moisture film, flue gas enters from inlet, advance and draw to sleeve pipe along helical duct from the axis of centres, moisture film on the helical channel outer wall is caught flue dust and dedusting, helical channel makes the total compactness, floor space is little, the centrifugal force that flue gas produces when flowing along helical channel gets rid of grit to the working face with moisture film and meets water and the sinking of condensing, can in passage, inject alkalies in case of necessity with sulphur removal, but this kind clarifier, when flue gas discharge capacity is big, then the cross section of helical duct is bigger, therefore the probability that contacts with moisture film reduces, its bending radius increases simultaneously, thereby reduced action of centrifugal force, efficiency of dust collection is descended, if and reduce the cross section of helical duct, then flue gas flow rate increases, when flue gas advances with certain speed, the water of the osculum ejection of liquid distributor can not spray to the sidewall of passage and be taken away by flue gas, also reduced efficiency of dust collection, the moisture content of being taken away simultaneously is mixed in the flue gas and can not removes, and has increased the water phenomenon of flue gas.

The purpose of this utility model provides a kind of cloth moisture film automatically, the desulfurization dust-removing efficiency height, and dehydrating function is strong, the desulfurating dust removing device for flue gas of compact conformation.

The purpose of this utility model realizes by following technical scheme, desulfurating dust removing device for flue gas has the shaped spiral housing of band spirality channel, the shaped spiral housing periphery has import, there is the axial outlet that communicates with inner ring at the center, it is characterized in that shaped spiral housing has the radially low taper lower casing of spirality channel and peripheral high center in wide cross section, there is discharging tube at the center of lower casing, also has the desulfurization cavity, sparge pipe is arranged in the cavity, the desulfurization cavity has one and tangentially is installed on the inlet tube of periphery and the outlet that is connected with said shaped spiral housing import on outer wall, the desulfurization cavity also has the low conical bottom board in center, there is delivery pipe at the base plate center, in spirality channel, in the 1/2-4/5 of entrance point total length length, be evenly equipped with sparge pipe along garden week.

Said sparge pipe on the center line of spirality channel or center line partially in a side.

When exhaust gas volumn is big, can also adopt a plurality of shaped spiral housings, each shaped spiral housing has entrance and exit in parallel, also has independent discharging tube.Therefore make flue gas shunting carry out desulfurization and dedusting and raise the efficiency.

During use, the flue gas that burning produces is at first introduced the desulfurization cavity, in cavity flow velocity descend and by sparge pipe spray into the fully washing and carry out desulfurization of scavenging solution (for example akaline liquid) institute, and flue dust is descended and fall into the liquid of bottom, flue gas enters the inlet of spirality channel from outlet, sparge pipe is positioned on the center line of passage or a side and the space liquid-spraying purified liquid around pipe partially in this passage, thereby flue gas can contact and act on scavenging solution fully, have the flue gas of scavenging solution owing to flow and wall that action of inertia rushes at spirality channel lateral wall particularly, with contained scavenging solution band to the passage wall and be distributed in wall particularly on the lateral wall, automatically form liquid film, remaining sulfur dioxide is cleaned the liquid neutralization once more in the flue gas in passage, flue dust in the flue gas is also adhered to and dedusting by liquid film simultaneously, in the length overall 1/2-4/5 length of the entrance point of spirality channel, be provided with above-mentioned sparge pipe, and sparge pipe is not established at the rear portion, make in the flue gas institute's water content fully to contact like this and adhere to and dewater with conduit wall, reached the desulfurization dust-removing efficiency height, automatic cloth moisture film, the purpose that dehydrating function is strong.For large-scale combustion apparatus, the exhaust gas volumn of generation is big especially, and the flue cross section is big, and desulfation dust-extraction device of the present utility model can make flue gas fully contact with scavenging solution, and can form liquid film automatically, has improved desulfurization and dust removing effects.Can adopt a plurality of shaped spiral housings to carry out the purified treatment of flue gas in case of necessity.

Below in conjunction with drawings and Examples desulfurating dust removing device for flue gas of the present utility model is described in detail.

Fig. 1 is the structure chart of a kind of embodiment of the utility model desulfurating dust removing device for flue gas;

Fig. 2 be the utility model desulfurating dust removing device for flue gas along A among Fig. 1 to view;

Fig. 3 is the partial sectional view of the utility model desulfurating dust removing device for flue gas along B-B face among Fig. 1;

Fig. 4 is the structure chart of second kind of embodiment of the utility model desulfurating dust removing device for flue gas.

As Fig. 1, Fig. 2, Fig. 3, this desulfurating dust removing device for flue gas has support 1, be fixed with housing 5 on the present embodiment support 1, housing 5 tops are divided into the shaped spiral housing 11 that has spirality channel, the bottom is divided into desulfurization cavity 7, housing 5 can be an one, also can make split and connect (as using screw) together, the periphery of shaped spiral housing 11 has import 17, there is axial outlet 13 at the center, the inner ring of spirality channel communicates with outlet, the cross section of the spirality channel of shaped spiral housing radially is wide (the spirality sidewall is approximately spiral of Archimedes), also has a taper lower casing 10 under central fovea, lower casing 10 middle parts have the discharging tube 6 of drawing downwards, the spirality sidewall that is connected with spirality channel that seals on the upper surface of lower casing 10, the below of taper lower casing 10 has a desulfurization cavity 7, the sparge pipe 9 that downward spray is arranged in the desulfurization cavity, desulfurization cavity 7 has the base plate 2 of a taper, the center has the delivery pipe of drawing downwards, the tangential gradually little air inlet pipe in cross section 16 that is equipped with on the lower, outer perimeter of desulfurization cavity 7, inlet 17 places of the adjacent spirality channel in desulfurization cavity 7 periphery tops have outlet, guide plate 15 makes it 17 to communicate with entering the mouth beyond the outlet, in case of necessity the inboard be added with inner guide plate 18 in case flue gas without cavity in and directly enter the inlet 17, deflector 8 the flowing with the guiding flue gas of horizontal direction can also be housed in the desulfurization cavity, sparge pipe 12 is housed in spirality channel, it can be along being distributed in spirality channel garden week in the 1/2-4/5 length of the passage length overall of import 17 and be positioned on the center line of spirality channel cross-section radial width or a center line side partially, sparge pipe 12 runs through lower casing 10 and extends in the separation of flow cavity and be communicated with sparge pipe 9 in the present embodiment, in spirality channel, perforates around the sparge pipe 12 and in passage even ejection scavenging solution, for example the hole along garden week spiral distribute or the distributing of layering the sparge pipe 9 ejection scavenging solution that then looses in the desulfurization cavity downwards along garden week.Sparge pipe 9 and 12 is connected by house steward.

Scavenging solution is water or akaline liquid.

Outside the conical bottom board of desulfurization cavity 7, at the delivery pipe place liquid-level controller 3 can be housed, the liquid level of liquid storage 4 in its control conical bottom board, when liquid level too high, then discharge, but the time control liquid level again and have end opening that certain altitude makes discharging tube 6 under liquid level and make in spirality channel and the desulfurization cavity and can not leak gas.

During use, the flue gas that combustion apparatus produces is introduced from air inlet pipe 16, owing to making flue gas form eddy flow and sprayed the akaline liquid institute of going into, tangential introducing fully washs, akaline liquid acts on mutually with sulfur in smoke and forms neutral liquid, because the desulfurization cavity volume is big, flue gas flow rate descends, and the flue dust that is drenched descends and precipitates, thereby has increased desulfurization and dust removing effects.Flue gas rises and enters in the spirality channel from outlet, sparge pipe at this channel centerline position constantly sprays into scavenging solution to all around, because the relative section of spiral flow channel is less, flow velocity is higher, the wet flue gas that flows rush at the spirality channel wall particularly sidewall surfaces and make wall particularly sidewall be furnished with liquid film automatically, flue gas is washed once more in spiral flow channel, remove sulfur dioxide, wet simultaneously big grit descends, little grit then rushes at sidewall by centrifugal force or contacts with wall and caught by liquid film and descend, the liquid of dust-laden flows to central drain pipe 6 and flow to housing 5 bottoms along the spiral flow channel on the taper lower casing 10, in spiral flow channel, (as the 1/2-1/5 of runner total length) do not establish sparge pipe 12 in one section runner of contiguous outlet, so flue gas can removed moisture content with being stained with on wall when flow path wall fully contacts and with moisture content.

Shaped spiral housing 11 can be one, also can be a plurality of, Fig. 4 shows the embodiment with 2 helical layer housings 11, in 7 outlets of desulfurization cavity, can many shaped spiral housings of 2-in parallel, they are preferably mutually stacked, be stacked two-layer as shown in this embodiment, desulfurization cavity 7 is positioned at the below of shaped spiral housing 11, can enter respectively behind the desulfurization cavity at flue gas in the shaped spiral housing of each layer and purify, thereby the cross section of avoiding shaped spiral housing is excessive and desulfurization dust-removing efficiency is descended, the stacked floor space that reduces of shaped spiral housing, and each helical layer shell structure is identical, just owing to the installation question outlet slightly changes, the top of shaped spiral housing 11 is added with shaped spiral housing, and they have the import 17 that the outlet with desulfurization cavity 7 in parallel is communicated with, and outlet 13 in parallel is arranged, the central outlet 13 of lower floor changes into from the side draws, the discharging tube 6 on upper strata is also drawn from the side, and it can be introduced in the conical bottom board 2 and also can draw separately, but need there be liquid storage the bottom and can leak gas.

The inner surface of desulfurization cavity and spiral flow channel should have anticorrosive coat, as pottery, and anticorrosive paint etc.

Desulfurating dust removing device for flue gas of the present utility model has the desulfurization cavity, flue gas is fully contacted with scavenging solution and improves desulfurized effect, make the flue dust sedimentation simultaneously and improve dust removing effects, in spirality channel, enlarged the spray volume, make flue gas can fully contact and form automatically moisture film with scavenging solution, desulfurization and dust removing effects have been improved, back segment at spirality channel is not established sparge pipe, and flue gas is fully dewatered, so the desulfurization dust-removing efficiency height, do not need the cloth moisture film, dehydrating function is strong.

Claims

1, a kind of desulfurating dust removing device for flue gas, shaped spiral housing (11) with band spirality channel, shaped spiral housing (11) periphery has import (17), there is the axial outlet (13) that communicates with inner ring at the center, it is characterized in that shaped spiral housing (11) has the radially low taper lower casing (10) of spirality channel and peripheral high center in wide cross section, there is discharging tube (6) at the center of lower casing (10), also has desulfurization cavity (7), sparge pipe (9) is arranged in the cavity, desulfurization cavity (7) has one and tangentially is installed on the inlet tube (16) of periphery and the outlet that is connected with the import (17) of said shaped spiral housing on the outer wall, desulfurization cavity (7) also has the low conical bottom board in center (2), there is delivery pipe at the base plate center, in spirality channel in the 1/2-4/5 of entrance point total length length, along being evenly equipped with sparge pipe (12) garden week.

2, desulfurating dust removing device for flue gas as claimed in claim 1 is characterized in that said shaped spiral housing (11) is one and is positioned at the top of desulfurization cavity (7).

3, desulfurating dust removing device for flue gas as claimed in claim 1, it is characterized in that said shaped spiral housing (11) has 2-3, and the mutual stacked top that is positioned at desulfurization cavity (7), shaped spiral housing (11) has import (17) that the outlet with desulfurization cavity (7) in parallel is connected and the outlet (13) that is in parallel.

4,, it is characterized in that said sparge pipe (12) is positioned on the center line of spirality channel or a center line side partially as claim 1 or 2 or 3 described desulfurating dust removing device for flue gas.

5,, it is characterized in that also having in the said desulfurization cavity (7) deflector (8) of horizontal direction as claim 1 or 2 or 3 described desulfurating dust removing device for flue gas.

6, desulfurating dust removing device for flue gas as claimed in claim 4 is characterized in that in the said desulfurization cavity (7) also having the deflector (8) of horizontal direction.

7,, it is characterized in that liquid-level controller (3) being housed at said delivery pipe place as claim 1 or 2 or 3 described desulfurating dust removing device for flue gas.

8, desulfurating dust removing device for flue gas as claimed in claim 4 is characterized in that said delivery pipe place is equipped with liquid-level controller (3).

9, desulfurating dust removing device for flue gas as claimed in claim 6 is characterized in that said delivery pipe place is equipped with liquid-level controller (3).