CN205288076U - Flue gas deep purification device behind wet flue gas desulfurization - Google Patents

Flue gas deep purification device behind wet flue gas desulfurization Download PDF

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Publication number
CN205288076U
CN205288076U CN201620020003.6U CN201620020003U CN205288076U CN 205288076 U CN205288076 U CN 205288076U CN 201620020003 U CN201620020003 U CN 201620020003U CN 205288076 U CN205288076 U CN 205288076U
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China
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flue gas
desulfurization
dehumidifier
dehumidizer
wet
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Expired - Fee Related
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CN201620020003.6U
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Chinese (zh)
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李见成
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李见成
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Abstract

The utility model discloses a flue gas deep purification device behind wet flue gas desulfurization for the in -depth is handled to the flue gas behind the wet flue gas desulfurization, includes degree of depth desulfurization dehydrating unit and whole level dust remover in proper order along flue gas flow direction, degree of depth desulfurization dehydrating unit includes the desulfurization dehumidifier, desulfurization dehumidifier upper portion is linked together through the gas vent that the flue gas advances pipe and desulfurizing tower, desulfurization dehumidifier bottom is linked together through the air inlet of flue gas exit tube with whole level dust remover, be equipped with dehumidizer sprinkler in the desulfurization dehumidifier, dehumidizer sprinkler is connected with dehumidizer and stores conveyor. Desulfurization of this device and dehumidification, dust collection efficiency height can satisfy standard for discharge of pollutants, and fume emission humidity is low, and the flue gas need not add the hot driving, can realize atmospheric environment humidity and discharge that the equipment investment is few, and the running cost is low.

Description

Wet-method desulfurized fume device for deep cleaning
Technical field
This utility model relates to fume treatment technical field, is specifically related to a kind of wet-method desulfurized fume device for deep cleaning, is applied to the fields such as building materials, metallurgy, chemical industry, environmental protection.
Background technology
China's cement kiln head smoke gas treatment, steel-making blast furnace smoke gas treatment, non-ferrous metal smelting furnace smoke gas treatment, oil refining apparatus smoke gas treatment, boiler smoke improvement etc., commonly used " (electrostatic/cloth bag) dedusting (limestone/lime Gypsum Fibrosum) wet desulphurization " desulfurization dust-removing technique, but along with the phenomenons such as haze are on the rise, environmental requirement is more and more higher.
Coal-burning power plant is always up the emphasis that National Environmental is administered, dedusting, desulfurization and denitrating system are had higher requirement by the new pollutant emission standard put into effect especially, how to control the problems such as the discharge of PM2.5 fine grained, gypsum rain and chimney blue smoke and have become the task of top priority.
In new " fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-2011), dust emission limit value brings up to 30 milligrams/cubic metre, and key area brings up to 20 milligrams/cubic metre. For adapting to new environmental requirement, China is again from abroad having introduced more advanced " (electrostatic/cloth bag) dedusting (limestone/lime Gypsum Fibrosum) wet desulphurization Wetting electrostatic cleaner smoke re-heater " technology. But domestic enterprise is omitted greatly " smoke re-heater " when using this technology, namely flue gas enters air after eventually passing through " Wetting electrostatic cleaner " process, although this technique dust emission concentration has reached 20 milligrams/cubic metre, but flue-gas temperature is at about 30��50 DEG C, and humidity is at 100��200g/Nm3(gram/mark side), and more than 10 times that boiler wet method desulfurization fume exhaust humidity is China's air medial humidity (medial humidity of China's air is only 9g/Nm3), total amount is seen, taking 1 ton of water estimation out of by ton coal combustion wet desulfurization flue gas, China's fire coal boiler fume wet desulphurization is every year to the steam of airborne release about 4,000,000,000 tons. Owing to smog discharge temperature reduction, humidity increase, make smoke evacuation be difficult to spread, increased the weight of haze pollution.
In December, 2015, Chinese Ministry of Environmental Protection and the Committee of Development and Reform combine the notice having issued " implementing in full coal-burning power plant's minimum discharge and reducing energy consumption programme of work ", require the year two thousand twenty, all of coal-burning power plant, the whole nation realizes minimum discharge (namely under benchmark oxygen content 6% condition, smoke dust discharge concentration is not higher than 10 milligrams/cubic metre, sulfur dioxide emissioning concentration is not higher than 35 milligrams/cubic metre), eastern region totally completes before being advanced to 2017.
In " (electrostatic/cloth bag) dedusting (limestone/lime Gypsum Fibrosum) wet desulphurization Wetting electrostatic cleaner " technique, adopt the desulfurization of three grades of sprays, when running into sulfur content height in flue gas, it is extremely difficult to the sulfur dioxide emissioning concentration requirement not higher than 35 milligrams/cubic metre; The final device controlling dust emission is Wetting electrostatic cleaner, owing to the performance of Wetting electrostatic cleaner limits, is extremely difficult to the smoke dust discharge concentration requirement not higher than 10 milligrams/cubic metre. It addition, Wetting electrostatic cleaner there is also the problem that cost is high, have high input. Owing to Wetting electrostatic cleaner adopts water to wash away electrode as flushing liquor, more increase the weight of the discharge humidity of flue gas, reduced the exhaust temperature of flue gas. If installing smoke re-heater again additional, then cost is higher, it is bigger to put into, and adds energy consumption and carbon emission.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of desulfurization and efficiency of dust collection is high, fume emission humidity is low, the discharge of atmospheric environment humidity can be realized, avoid high-humidity gas fume that equipment and chimney are corroded, it is possible to be effectively improved haze pollution problem and the low wet-method desulfurized fume device for deep cleaning of operating cost.
For solving above-mentioned technical problem, the technical solution of the utility model is:
Wet-method desulfurized fume device for deep cleaning, for the flue gas in-depth after wet desulphurization is processed, includes deep desulfuration dehydrating unit and whole level cleaner unit successively along flow of flue gas direction;
Described deep desulfuration dehydrating unit includes desulfurization dehumidifier, described desulfurization dehumidifier top is connected with the air vent of desulfurizing tower by flue gas inlet pipe, go out pipe by flue gas bottom described desulfurization dehumidifier to be connected with the air inlet of whole level cleaner unit, being provided with dehumidizer flusher in described desulfurization dehumidifier, described dehumidizer flusher is connected to dehumidizer Storing and conveying device.
As preferred technical scheme, described dehumidizer flusher includes the shower nozzle being installed in described desulfurization dehumidifier.
As preferred technical scheme, described dehumidizer Storing and conveying device includes storage warehouse, is provided with discharge port bottom described storage warehouse, and described discharge port is connected to aerator, is provided with conveying pipe between described discharge port and described shower nozzle.
As preferred technical scheme, the exhaust port side of described whole level cleaner unit is provided with exhaustor, and described exhaustor is provided with booster fan.
As preferred technical scheme, described whole level cleaner unit is sack cleaner.
As preferred technical scheme, described desulfurization dehumidifier includes housing, there is in described housing the chamber for flue gas and calcium oxide dry powder blend, described chamber top is connected with the air vent of desulfurizing tower by described flue gas inlet pipe, and described cavity bottom goes out pipe by described flue gas and is connected with the air inlet of whole level cleaner unit.
As preferred technical scheme, described housing bottom is provided with flue-dust retainer, is provided with discharge valve bottom described flue-dust retainer.
This utility model adopts " the whole dedusting of first dusting and wet Desulfovibrio dehumidifying " technique, improve desulfurization and efficiency of dust collection, disclosure satisfy that coal-burning power plant realizes minimum discharge (namely under benchmark oxygen content 6% condition, smoke dust discharge concentration is not higher than 10 milligrams/cubic metre, sulfur dioxide emissioning concentration is not higher than 35 milligrams/cubic metre) requirement, and the problem solving prior art fume emission high humidity, the discharge of atmospheric environment humidity can be realized, flue gas need not be reheated, process stabilizing, equipment investment cost, operating cost are low.Meanwhile, this technique also solves the high-humidity gas fume etching problem to equipment and chimney.
Accompanying drawing explanation
The following drawings is only intended to, in this utility model being schematically illustrated and explaining, not limit the scope of utility model. Wherein:
Fig. 1 is the process flow diagram of this utility model embodiment purification method;
Fig. 2 is the structural representation of this utility model embodiment purifier.
In figure: 1-desulfurization dehumidifier; 11-flue gas inlet pipe; 12-flue gas goes out pipe; 13-shower nozzle; 14-housing; 15-chamber; 2-level at end cleaner unit; 16,21-flue-dust retainer; 17,22-discharge valve; 23-exhaustor; 24-booster fan; 31-storage warehouse; 32-discharge port; 33-aerator; 34-carries pipe.
Detailed description of the invention
Below in conjunction with specific embodiment, this utility model is described further. In the following detailed description, only some one exemplary embodiment of the present utility model is described by the mode of explanation. Undoubtedly, those of ordinary skill in the art will be consequently realised that, when not necessarily departing from spirit and scope of the present utility model, it is possible to by various different modes, described embodiment is modified. Therefore, described below it is inherently illustrative, rather than is used for limiting scope of the claims.
With reference to Fig. 1 and Fig. 2, wet-method desulfurized fume device for deep cleaning, for the flue gas in-depth after wet desulphurization is processed, including deep desulfuration dehydrating unit and whole level cleaner unit 2 successively along flow of flue gas direction, whole level cleaner unit 2 can adopt sack cleaner;
Described deep desulfuration dehydrating unit includes desulfurization dehumidifier 1, described desulfurization dehumidifier 1 includes housing 14, there is in housing 14 chamber 15 for flue gas and calcium oxide dry powder blend, chamber 15 top is connected with the air vent of desulfurizing tower by flue gas inlet pipe 11, go out pipe 12 by flue gas bottom chamber 15 to be connected with the air inlet of whole level cleaner unit 2, being provided with flue-dust retainer 16 bottom described housing 14, described flue-dust retainer 16 is provided with discharge valve 17; Being provided with dehumidizer flusher in described desulfurization dehumidifier 1, described dehumidizer flusher is connected to dehumidizer Storing and conveying device.
Wherein, described dehumidizer flusher includes the shower nozzle 13 being installed in described desulfurization dehumidifier 1, described dehumidizer Storing and conveying device includes the storage warehouse 31 for storing calcium oxide dry powder, it is provided with discharge port 32 bottom described storage warehouse 31, described discharge port 32 is connected to aerator 33, is provided with conveying pipe 34 between described discharge port 32 and described shower nozzle 13. During work, by shower nozzle 13, calcium oxide dry powder is sprayed in desulfurization dehumidifier 1 under aerator 33 acts on. The exhaust port side of described whole level cleaner unit 2 is provided with exhaustor 23, and described exhaustor 23 is provided with booster fan 24, can quickly be discharged by the flue gas after finally process by booster fan 24 supercharging.
In the present embodiment, the equipment such as described electrostatic precipitator, sack cleaner, desulfurizing tower is common equipment known in this field, and its structure no longer repeats.
As depicted in figs. 1 and 2, the operation principle of the present embodiment is as follows:
Step one. flue gas just dedusting: sulfur-bearing ash-laden gas initially enters primary cleaner unit (can adopt electrostatic precipitator or sack cleaner), it is captured after filtering and falls into ash bucket, discharged by the discharge valve of hopper bottom, at this moment can remove the dust of 99% in flue gas;
Step 2. smoke-gas wet desulfurization: the flue gas after first dedusting enters desulfurizing tower, through three grades of sprays, flue gas and desulfurizing agent are fully contacted, desulfurizing agent is made turbid solution by limestone or Calx, can also being made up of basic matterials such as sodium hydroxide, enter desulfurizing tower through spray system, the most of sulfur dioxide contained in flue gas generates Gypsum Fibrosum with calcium hydroxide reaction in desulfurizing agent, major part Gypsum Fibrosum enters sedimentation tank precipitation with water, and the clear liquid after clarification recycles with being pumped into desulfurizing tower;With the flue gas after reactive desulfurizing agent in desulfurizing tower through two-stage water knockout drum, after removing major part water, carry a small amount of Gypsum Fibrosum and discharge outside tower;
Step 3. flue gas deep desulfuration dehumidifies: the flue gas after wet desulphurization processes enters desulfurization dehumidifier 1, it is sufficiently mixed with the calcium oxide dry powder (dehumidizer) sprayed into, the oxidized calcium absorption of moisture in flue gas forms calcium hydroxide, in flue gas, the sulfur dioxide of residual and calcium hydroxide reaction are removed, the oxidized calcium dry powder of gypsum component carried in flue gas dries, and forms Gypsum Fibrosum powder;
Step 4. flue gas dedusting at end: the flue gas after deep desulfuration dehumidifies enters whole level cleaner unit 2, and the gas becoming clean dried through dust removal by filtration finally discharges, the dustiness��5mg/Nm in final discharge flue gas3, humidity��9g/Nm3, sulfur dioxide��20mg/Nm3The dust formed in deep desulfuration dehumidification process is discharged through the discharge valve 22 being located on collector for duster ash bucket 21, at this moment dust be mainly composed of calcium oxide, calcium hydroxide, also have a small amount of calcium sulfate, after discharge, dust can be transported to the desulfurizing agent of desulfurization section and prepares pond and prepare desulfurizing agent.
Of the present utility model ultimate principle, principal character and of the present utility model advantage have more than been shown and described. Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; described in above-described embodiment and description is that principle of the present utility model is described; under the premise without departing from this utility model spirit and scope; this utility model also has various changes and modifications, and these changes and improvements both fall within the scope of claimed this utility model. This utility model claims scope and is defined by appending claims and equivalent thereof.

Claims (7)

1. wet-method desulfurized fume device for deep cleaning, for processing the flue gas in-depth after wet desulphurization, it is characterised in that: deep desulfuration dehydrating unit and whole level cleaner unit is included successively along flow of flue gas direction;
Described deep desulfuration dehydrating unit includes desulfurization dehumidifier, described desulfurization dehumidifier top is connected with the air vent of desulfurizing tower by flue gas inlet pipe, go out pipe by flue gas bottom described desulfurization dehumidifier to be connected with the air inlet of whole level cleaner unit, being provided with dehumidizer flusher in described desulfurization dehumidifier, described dehumidizer flusher is connected to dehumidizer Storing and conveying device.
2. wet-method desulfurized fume device for deep cleaning as claimed in claim 1, it is characterised in that: described dehumidizer flusher includes the shower nozzle being installed in described desulfurization dehumidifier.
3. wet-method desulfurized fume device for deep cleaning as claimed in claim 2, it is characterized in that: described dehumidizer Storing and conveying device includes storing the storage warehouse of dehumidizer, it is provided with discharge port bottom described storage warehouse, described discharge port is connected to aerator, is provided with conveying pipe between described discharge port and described shower nozzle.
4. wet-method desulfurized fume device for deep cleaning as claimed in claim 3, it is characterised in that: the exhaust port side of described whole level cleaner unit is provided with exhaustor, and described exhaustor is provided with booster fan.
5. purifier as claimed in claim 4, it is characterised in that: described whole level cleaner unit is sack cleaner.
6. the wet-method desulfurized fume device for deep cleaning as described in claim 1,2,3,4 or 5, it is characterized in that: described desulfurization dehumidifier includes housing, there is in described housing the chamber for flue gas and calcium oxide dry powder blend, described chamber top is connected with the air vent of desulfurizing tower by described flue gas inlet pipe, and described cavity bottom goes out pipe by described flue gas and is connected with the air inlet of whole level cleaner unit.
7. wet-method desulfurized fume device for deep cleaning as claimed in claim 6, it is characterised in that: described housing bottom is provided with flue-dust retainer, is provided with discharge valve bottom described flue-dust retainer.
CN201620020003.6U 2016-01-08 2016-01-08 Flue gas deep purification device behind wet flue gas desulfurization Expired - Fee Related CN205288076U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105642104A (en) * 2016-01-08 2016-06-08 李见成 Deep purification method and device of flue gas after wet-process desulfurization

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105642104A (en) * 2016-01-08 2016-06-08 李见成 Deep purification method and device of flue gas after wet-process desulfurization
CN105642104B (en) * 2016-01-08 2018-09-14 李见成 Wet-method desulfurized fume deep-purifying method and device

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160608

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CF01 Termination of patent right due to non-payment of annual fee