CN208911702U - A kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus - Google Patents
A kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus Download PDFInfo
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- CN208911702U CN208911702U CN201821600181.1U CN201821600181U CN208911702U CN 208911702 U CN208911702 U CN 208911702U CN 201821600181 U CN201821600181 U CN 201821600181U CN 208911702 U CN208911702 U CN 208911702U
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Abstract
The utility model discloses a kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus, including deduster, low-temperature oxidation device and absorption tower, deduster, low-temperature oxidation device and absorption tower successively to arrange；Low-temperature oxidation device is provided with oxidant supplying tank, low-temperature oxidation device is provided with exhaust gas inlet, waste gas outlet and oxidant inlet, deduster is connected with exhaust gas inlet, waste gas outlet is connected with absorption tower, oxidant supplying tank is connected with oxidant inlet, and first circulation pump is provided between oxidant supplying tank and oxidant inlet；The bottom on absorption tower is provided with recovery pond, and spraying layer is provided with above recovery pond, demisting layer is provided with above spraying layer；Absorption tower is provided with lye supplying tank, and lye supplying tank is connected with recovery pond, and third circulating pump is provided between recovery pond and lye supplying tank.The utility model has carries out oxidizing lower nitrogen oxides at low temperature, integrates the advantage of dust-removal and desulfurizing denitration.
Description
Technical field
The utility model relates to a kind of desulfuring and denitrifying apparatus, specifically a kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus.
Background technique
The nitrogen oxides contained in industrial smoke is largely discharged into air and not only will form Acid rain damages ozone layer, and
And greenhouse effects is caused to lead to global warming.
On 06 27th, 2012, Environmental Protection Department and State Administration for Quality Supervision and Inspection and Quarantine issued " steel sintering, ball
Group's industrial air pollution object discharge standard ", implement from October 01st, 2012.It is required in standard existing from January 1st, 2015
Enterprise executes: sintering machine sulfur dioxide (SO2) emissions limit value is 200mg/m3, nitrogen oxides is (with NO2Meter) emission limit be 300mg/
m3, particulate matter 50mg/m3；Some areas execute special emission limit: sulfur dioxide (SO2) emissions limit value is 180mg/m3, particulate matter
For 40mg/m3。
In 12 planning, in terms of the atmosphere pollution attached most importance to sulfur dioxide and nitrogen oxides:
Accelerate non-electrical key industry desulphurization denitration process: steel sintering machine implements in full flue gas of sintering machine；It is newly-built to burn
Knot machine answers mating installation desulphurization denitration facility；Reinforce industrial furnace smoke sulfur dioxide to administer.
As the increasing of environmentally friendly dynamics, and most regional thermal power plants have executed minimum discharge standard: sulfur dioxide row
Putting limit value is 35mg/m3, nitrogen oxides is (with NO2Meter) emission limit be 50mg/m3, particulate matter 10mg/m3.The following steel row
The atmosphere pollutants emission standards of industry will be more severe, and In Zibo, Shandong has required part iron factory execution nitrogen in 2018 at present
Oxide is (with NO2Meter) emission limit 100mg/m3。
Currently, sintering device flue gas denitration technology there is a problem of it is following: since the exhaust gas temperature of sintering machine end generally exists
160 DEG C hereinafter, dustiness height, traditional SNCR denitration technology do not have suitable temperature range that cannot be applicable in flue gas；If adopted
With the mating low temperature catalyst of SCR, also need mating heat riser that flue gas is risen to 200 DEG C or so, dedusting can only be arranged in SCR device
After device before desulfurizing tower, but without the sintering machine SO before desulfurization2Substantially all in 1000mg/m3More than, it will cause in low temperature catalyst
Poison；If needing to rise to flue-gas temperature into 320 DEG C or more using the mating conventional catalyst of SCR, not only invest so big, attached
Equipment is more, take up a large area, operating cost is also very high.It needs one kind that can aoxidize to low-temperature flue gas at present, and collects de-
Nitre, desulfurization are in the device of one.
Desulphurization denitration processing cannot be carried out to flue gas in low-temperature flue gas section by needing to solve desulfuring and denitrifying apparatus at present, will be taken off
The problem of nitre, desulfurization are separately handled.
Utility model content
In order to overcome the defect of the prior art as indicated above, the present inventor has made intensive studies this, is paying
After a large amount of creative works, so as to complete the utility model.
Specifically, the technical problem to be solved by the utility model is to cannot be taken off in low-temperature flue gas section to flue gas
Sulphur denitration process, and the problem of two denitration, desulfurization processes are separately handled.
To achieve the above object, the utility model provides the following technical solutions:
A kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus, including deduster, low-temperature oxidation device and absorption tower, the dedusting
Device, low-temperature oxidation device and absorption tower are successively arranged；
The first atomizer is provided in the low-temperature oxidation device, the low-temperature oxidation device is provided with oxidant supplying tank,
The low-temperature oxidation device is provided with exhaust gas inlet, waste gas outlet and oxidant inlet, the deduster and the exhaust gas inlet phase
Connection, the waste gas outlet are connected with the absorption tower, and the oxidant supplying tank is connected with the oxidant inlet, institute
It states the first atomizer to be connected with the oxidant inlet, and is set between the oxidant supplying tank and the oxidant inlet
It is equipped with first circulation pump；
The bottom on the absorption tower is provided with recovery pond, and spraying layer, the spraying layer are provided with above the recovery pond
It is provided with the second atomizer, demisting layer is provided with above the spraying layer, the outside on the absorption tower is provided with connection institute
The pipeline of spraying layer and the recovery pond is stated, one end of the pipeline is connected with the second atomizer that spraying layer is arranged in,
The other end of the pipeline is connected with recovery pond, and second circulation pump is provided on the pipeline；The absorption tower is provided with alkali
Liquid supplying tank, the lye supplying tank are connected with the recovery pond, are arranged between the recovery pond and the lye supplying tank
There is third circulating pump.
As a further solution of the present invention: first atomizer is evenly distributed on the low-temperature oxidation device
On radial section, and the injection direction of first atomizer is opposite with flow direction of the flue gas in the low-temperature oxidation device.
As a further solution of the present invention: being sprayed in the low-temperature oxidation device at least provided with one layer of first atomization
Mouth.
As a further solution of the present invention: second atomizer is evenly distributed on the radial section on absorption tower
On, the injection direction of second atomizer is downward.
As a further solution of the present invention: the spraying layer is at least provided with one layer of second atomizer.
As a further solution of the present invention: the demisting layer is at least provided with one layer of demister.
As a further solution of the present invention: the oxidant inlet of the first circulation pump and the low-temperature oxidation device
Between be provided with first flow control valve, be provided with second flow control valve between the spraying layer and second circulation pump.
As a further solution of the present invention: the absorption tower is provided with by-product recovery tank, and the by-product
Recycling can is connected with the recovery pond, and is provided with the 4th circulating pump between the by-product recovery tank and the recovery pond.
As a further solution of the present invention: the by-product recovery tank is provided with oxidation fan.
Compared with prior art, the utility model has the beneficial effects that
A kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus, including deduster, low-temperature oxidation device and absorption tower, deduster,
Low-temperature oxidation device and absorption tower are successively arranged；The first atomizer is provided in low-temperature oxidation device, the setting of low-temperature oxidation device is aerobic
Agent supplying tank, low-temperature oxidation device are provided with exhaust gas inlet, waste gas outlet and oxidant inlet, and deduster is connected with exhaust gas inlet
Logical, waste gas outlet is connected with absorption tower, and oxidant supplying tank is connected with oxidant inlet, the first atomizer and oxidant
Import is connected, and first circulation pump is provided between oxidant supplying tank and oxidant inlet；
The bottom on absorption tower is provided with recovery pond, and spraying layer is provided with above recovery pond, and spraying layer is provided with the second mist
Change nozzle, demisting layer is provided with above spraying layer, the outside on absorption tower is provided with the pipeline of connection spraying layer and recovery pond, pipe
The one end in road is connected with the second atomizer that spraying layer is arranged in, and the other end of pipeline is connected with recovery pond, on pipeline
It is provided with second circulation pump；Absorption tower is provided with lye supplying tank, and lye supplying tank is connected with recovery pond, recovery pond and lye
Third circulating pump is provided between supplying tank.Based on the above structure, deduster can play the role of removing dust in flue gas.It is low
Subnitrides can be oxidized to high price nitride by warm oxidator, improve lye to the absorption efficiency of nitride；In low temperature cigarette
Gas section, which can be realized, carries out desulphurization denitration processing to flue gas.Absorption tower can take off in absorbing NOx, sulfide, collection desulfurization simultaneously
Nitre in one, spraying layer can spray lye can absorbing NOx and sulfide, demisting layer can will not complete contain solid-liquid
The separation process from flue gas is dripped, the efficiency of desulphurization denitration is improved.
First atomizer is evenly distributed on the radial section of low-temperature oxidation device, and the injection direction of the first atomizer
With flow direction of the flue gas in low-temperature oxidation device on the contrary, the structure can guarantee being sufficiently mixed for flue gas and oxidant, to realize
It is soluble higher nitrogen oxides by lower nitrogen oxides, the contact area of flue gas and oxidant can be increased, improves
Oxidation efficiency.
At least provided with one layer of first atomizer in low-temperature oxidation device, which can guarantee the oxidation effect of oxidant
Fruit.
Second atomizer is evenly distributed on the radial section on absorption tower, and the injection direction of the second atomizer is downward,
The structure can form mist area below spraying layer, improve the neutralization reaction efficiency of lye and nitrogen oxides, oxysulfide；Second
The injection direction of atomizer is downward, it is possible to increase the contact area of nitrogen oxides, oxysulfide and lye.
Spraying layer can guarantee lye and nitrogen oxides, oxysulfide at least provided with one layer of second atomizer, the structure
The effect that neutralization reaction occurs, improves the efficiency of desulphurization denitration.
At least provided with one layer of demister, which can complete to drip the separation process from flue gas containing solid-liquid demisting layer,
It is discharged outside tower after realizing efficient demisting dedusting by chimney.
First flow control valve is provided between first circulation pump and the oxidant inlet of low-temperature oxidation device, spraying layer and the
Second flow control valve is provided between two circulating pumps, the setting of the structure can control flow, guarantee that stablizing for reaction carries out,
It is avoided that the waste of oxidant, lye, save the cost.
Absorption tower is provided with by-product recovery tank, and by-product recovery tank is connected with recovery pond, and by-product recovery tank
The 4th circulating pump is provided between recovery pond.By-product recovery tank can recycle the by-product of recovery pond, effectively
Utilize byproduct of reaction.
By-product recovery tank is provided with oxidation fan, and oxidation fan can accelerate oxidation rate, the Asia in oxidized byproduct
Nitrate and sulphite improve the economic benefit of by-product.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
In figure: 1, deduster, 2, low-temperature oxidation device, the 3, first atomizer, 4, oxidant supplying tank, 5, first circulation
Pump, 6, first flow control valve, 7, absorption tower, 8, spraying layer, the 81, second atomizer, 9, demisting layer, 10, recovery pond, 11,
Lye supplying tank, 12, third circulating pump, 13, second circulation pump, 14, by-product recovery tank, 15, oxidation fan, the 16, the 4th follows
Ring pump, 17, second flow control valve.
Specific embodiment
The technical solution of the patent is explained in further detail With reference to embodiment.
Referring to Fig. 1, a kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus, including deduster 1, low-temperature oxidation device 2 and suction
Tower 7 is received, deduster 1, low-temperature oxidation device 2 and absorption tower 7 are successively arranged；The first atomizer 3 is provided in low-temperature oxidation device 2,
Low-temperature oxidation device 2 is provided with oxidant supplying tank 4, low-temperature oxidation device 2 be provided with exhaust gas inlet, waste gas outlet and oxidant into
Mouthful, deduster 1 is connected with exhaust gas inlet, and waste gas outlet is connected with absorption tower 7, oxidant supplying tank 4 and oxidant inlet
It is connected, the first atomizer 3 is connected with oxidant inlet, and is provided between oxidant supplying tank 4 and oxidant inlet
First circulation pump 5；The bottom on absorption tower 7 is provided with recovery pond 10, and the top of recovery pond 10 is provided with spraying layer 8, spraying layer 8
It is provided with the second atomizer 81, the top of spraying layer 8 is provided with demisting layer 9, and the outside on absorption tower 7 is provided with connection spraying layer
8 and recovery pond 10 pipeline, one end of pipeline is connected with the second atomizer 81 that spraying layer is arranged in, the other end of pipeline
It is connected with recovery pond 10, second circulation pump 13 is provided on pipeline；Absorption tower 7 is provided with lye supplying tank 11, lye supply
Tank 11 is connected with recovery pond 10, and third circulating pump 12 is provided between recovery pond 10 and lye supplying tank 11.1 energy of deduster
Enough remove dust in flue gas.Subnitrides can be oxidized to high price nitride by low-temperature oxidation device 2, improve lye to nitride
Absorption efficiency；It can be realized in low-temperature flue gas section and desulphurization denitration processing carried out to flue gas.Absorption tower 7 can simultaneously absorbed nitrogen oxygen
Compound, sulfide, integrate desulphurization denitration, spraying layer 8 can spray lye can absorbing NOx and sulfide, remove
Mist layer 9 can drip the separation process from flue gas containing solid-liquid for not completing, and improve the efficiency of desulphurization denitration.
First atomizer 3 is evenly distributed on the radial section of low-temperature oxidation device 2, and the injection of the first atomizer 3
Direction and flue gas are in the flow direction in low-temperature oxidation device 2 on the contrary, at least provided with one layer of first atomizer 3 in low-temperature oxidation device 2.
First atomizer 3 can guarantee being sufficiently mixed for flue gas and oxidant, to realize lower nitrogen oxides oxygen
Turn to soluble higher nitrogen oxides.The injection direction of first atomizer 3 flows to phase in low-temperature oxidation device 2 with flue gas
Instead, the contact area of flue gas and oxidant can be increased, improve oxidation efficiency.Be conducive to for subnitrides to be oxidized to high price nitrogen
Compound, so that oxidant and nitride come into full contact with.
Second atomizer 81 can form mist area below spraying layer 8, increase the contact area of flue gas and lye,
Reaction is come into full contact with to guarantee nitrogen oxides, oxysulfide and lye.
Second atomizer 81 is evenly distributed on the radial section on absorption tower 7, the injection direction of the second atomizer 81
Downwards.Mist area is formed below spraying layer 8, lye and nitrogen oxides, sulfide occur neutralization reaction, generates nitrate, Asia
Nitrate, sulfate and sulphite.
Spraying layer 8 at least provided with one layer of second atomizer 81, the second 81 layers of atomizer can guarantee nitrogen oxides,
Oxysulfide and lye come into full contact with reaction, improve absorption tower 7 to the assimilation effect of nitrogen oxides, oxysulfide.
Demisting layer 9 is at least provided with one layer of demister, and demisting layer 9 is provided with two layers of demister, demisting in the present embodiment
Device is mainly made of plate, supporting arrangement, is polypropylene plate in the present embodiment, and sheet structure is streamlined.Flue gas is removing
It completes to drip the separation process from flue gas containing solid-liquid in mist layer 9, be discharged outside tower after realizing efficient demisting dedusting by chimney.After desulfurization
Flue gas demister is flowed through with certain speed, flue gas is rapidly, continuously changed the direction of motion, because of the work of centrifugal force and inertia
With, the droplet in flue gas strikes and is captured down on demister blade, and droplet collects to form water flow, because of the effect of gravity, under
It drops down onto and is recycled in recovery pond 10, realize gas-liquid separation, the flue gas for passing through demister reaches demisting and requires heel row
Out.
First flow control valve 6, spraying layer are provided between first circulation pump 5 and the oxidant inlet of low-temperature oxidation device 2
Second flow control valve 17 is provided between 8 and second circulation pump 13.Flow control valve can control flow, guarantee reaction
Stablize and carry out, is avoided that the waste of oxidant, lye, save the cost.
Absorption tower 7 is provided with by-product recovery tank 14, and by-product recovery tank 14 is connected with recovery pond 10, and by-product returns
The 4th circulating pump 16 is provided between closed cans 14 and recovery pond 10, by-product recovery tank 14 can be by the by-product of recovery pond 10
It is recycled, improves the economic benefit of byproduct of reaction.
By-product recovery tank 14 is provided with oxidation fan 15, oxidation fan 15 can nitrite in oxidized byproduct and
Sulphite improves the economic benefit of by-product.
The course of work of the utility model: for flue gas after the dustproof function of deduster 1, flue gas enters low-temperature oxidation device
In 2, in the present embodiment, two layers of first atomizers 3 are provided in low-temperature oxidation device 2.Oxidant passes through the first atomizer 3
Act in oxidator formation mist layer, oxidant and nitrogen oxides carry out oxidation reaction, to realize low price nitrogen oxidation
Object is oxidized to soluble higher nitrogen oxides.Oxidant supplying tank 4 passes through the oxidant inlet phase of pipeline and low-temperature oxidation device 2
Even, and before first circulation pump 5 and low-temperature oxidation device 2 it is provided with first flow control valve 6, oxidizer flow rate can be controlled,
Guarantee that stablizing for desulfurization and denitrification reaction carries out.
It does not enter in flue gas to before absorption tower 7, lye supplying tank 11 is by the effect of third circulating pump 12 to recovery pond
10 supply lye, after reaching required lye amount, lye supplying tank 11 stops working.It will recycling using second circulation pump 13
Lye in pond 10 is transported to spraying layer 8.After flue gas aoxidizes in low-temperature oxidation device 2, absorption tower 7 is entered.The present embodiment
In, spraying layer 8 is provided with three layer of second atomizer 81, and the injection direction of the second atomizer 81 is downward, is evenly distributed on suction
On the radial section for receiving tower 7.Mist area is formed below spraying layer 8, the contact area of flue gas and lye is increased, to guarantee
Nitrogen oxides, oxysulfide and lye come into full contact with reaction；Second is both provided between spraying layer 8 and second circulation pump 13
Control valve 17, second flow control valve 17 can control flux of alkaline liquor, guarantee that stablizing for desulfurization and denitrification reaction carries out.
In the present embodiment, demisting layer 9 is provided with two layers of demister, completes to drip containing solid-liquid from flue gas in demisting layer 9
In separation process, flue gas realizes after efficient demisting dedusting outside by chimney discharge tower that the droplet in flue gas strikes demister leaf
On piece is captured down, and droplet collects to form water flow, because of the effect of gravity, falls to recovery pond 10, is recycled.Work as alkali
After the alkalinity of liquid reaches setting value, by-product recovery tank 14 is transported to by the 4th circulating pump 16.Meanwhile lye supplying tank 11
Lye can be supplemented to recovery pond 10.The by-product recovery tank 14 is provided with oxidation fan 15, and oxidation fan 15 can aoxidize sulfurous
Acid and nitrite, realize the efficient utilization of by-product.
The utility model realizes the oxidation in low-temperature zone, and desulphurization and denitration and dust-extraction unit are become one, and reduces
Occupied area reduces difficulty of construction, and one time cost of investment is small, and operation energy consumption substantially reduces.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover within the scope of the claims and the description of the invention.
Claims (9)
1. a kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus, including deduster, low-temperature oxidation device and absorption tower, the dedusting
Device, low-temperature oxidation device and absorption tower are successively arranged；
It is characterized in that, being provided with the first atomizer in the low-temperature oxidation device, the low-temperature oxidation device is provided with oxidant
Supplying tank, the low-temperature oxidation device are provided with exhaust gas inlet, waste gas outlet and oxidant inlet, the deduster and the exhaust gas
Import is connected, and the waste gas outlet is connected with the absorption tower, the oxidant supplying tank and the oxidant inlet phase
Connection, first atomizer is connected with the oxidant inlet, and the oxidant supplying tank and the oxidant into
First circulation pump is provided between mouthful；
The bottom on the absorption tower is provided with recovery pond, and spraying layer, the spraying layer setting are provided with above the recovery pond
There is the second atomizer, demisting layer is provided with above the spraying layer, the outside on the absorption tower is provided with the connection spray
The pipeline of drenching layer and the recovery pond, one end of the pipeline is connected with the second atomizer that spraying layer is arranged in, described
The other end of pipeline is connected with recovery pond, and second circulation pump is provided on the pipeline；The absorption tower is provided with lye confession
To tank, the lye supplying tank is connected with the recovery pond, and is provided between the recovery pond and the lye supplying tank
Three circulating pumps.
2. a kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus according to claim 1, which is characterized in that first mist
Change nozzle to be evenly distributed on the radial section of the low-temperature oxidation device, and the injection direction and flue gas of first atomizer
Flow direction in the low-temperature oxidation device is opposite.
3. a kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus according to claim 1, which is characterized in that the cryogenic oxygen
Change in device at least provided with one layer of first atomizer.
4. a kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus according to claim 1, which is characterized in that second mist
Change nozzle to be evenly distributed on the radial section on absorption tower, the injection direction of second atomizer is downward.
5. a kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus according to claim 1, which is characterized in that the spraying layer
At least provided with one layer of second atomizer.
6. a kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus according to claim 1, which is characterized in that the demisting layer
At least provided with one layer of demister.
7. a kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus according to claim 1, which is characterized in that described first follows
First flow control valve, the spraying layer and second circulation are provided between ring pump and the oxidant inlet of the low-temperature oxidation device
Second flow control valve is provided between pump.
8. a kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus according to claim 1, which is characterized in that the absorption tower
Be provided with by-product recovery tank, and the by-product recovery tank is connected with the recovery pond, and the by-product recovery tank and
The 4th circulating pump is provided between the recovery pond.
9. a kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus according to claim 8, which is characterized in that the by-product
Recycling can is provided with oxidation fan.
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| CN201821600181.1U CN208911702U (en) | 2018-09-29 | 2018-09-29 | A kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus |
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| CN201821600181.1U CN208911702U (en) | 2018-09-29 | 2018-09-29 | A kind of sintering device flue gas dust-removal and desulfurizing denitrification apparatus |
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ID=66707649
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111111349A (en) * | 2020-01-16 | 2020-05-08 | 广西金科环境工程有限公司 | Process and equipment for treating tail gas generated in production of artificial board |
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2018
- 2018-09-29 CN CN201821600181.1U patent/CN208911702U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111111349A (en) * | 2020-01-16 | 2020-05-08 | 广西金科环境工程有限公司 | Process and equipment for treating tail gas generated in production of artificial board |
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