CN208878244U - A kind of device of removal of nitrogen oxide - Google Patents
A kind of device of removal of nitrogen oxide Download PDFInfo
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- CN208878244U CN208878244U CN201821608154.9U CN201821608154U CN208878244U CN 208878244 U CN208878244 U CN 208878244U CN 201821608154 U CN201821608154 U CN 201821608154U CN 208878244 U CN208878244 U CN 208878244U
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Abstract
This application discloses a kind of devices of removal of nitrogen oxide, described device includes the first absorption tower and the second absorption tower of two-stage series connection, first absorb the bottom of the tower is provided with the first air inlet, the first gas outlet is provided at the top of first absorption tower, second air inlet of first gas outlet in the second absorption tower bottom is connected, it is provided with the second gas outlet at the top of the second absorption tower, second gas outlet is connected with air-introduced machine.Compared with the prior art, the advantages of the present invention are: process conditions are low temperature, low pressure, reaction condition is mild, and process is simple, and nitrogen oxides treatment is high-efficient.
Description
Technical field
This application involves the field of removal of nitrogen oxide, especially a kind of device of removal of nitrogen oxide
Background technique
Chemical plant is producing a variety of chemical products, such as nitric acid, nitrobenzene, nitrogenous fertilizer and is prepared with nitric acid and metal reaction more
Nitrous oxides exhaust gas can be generated in the production process of kind nitrate, nitrogen oxides mainly includes nitric oxide (NO) and nitrogen dioxide
(NO2), these exhaust gas are very big to the detrimental effect of environment, are both to form one of main matter of acid rain, and formed in atmosphere
The important substance and consumption ozone (O of photochemical fog3) an important factor, it is therefore necessary to it is handled.
The method of existing nitrous oxides exhaust gas processing generally has: selective non-catalytic reduction method (SNCR method), selectivity are urged
Change reduction method (SCR method), absorption method and absorption process etc..SNCR method and SCR method be with reducing agent ammonia or urea at relatively high temperatures,
Nitrogen oxides is reduced to nitrogen and water, and final harmless discharge, both methods under catalyst or without catalyst action
Be generally used for the nitrogen oxides treatment of thermal power plant, SCR technology be current most mainstream furnace after gas denitrifying technology, the technology is de-
Except efficiency is not suitable for handling low temperature waste gas denitration up to 80% or more, SNCR and SCR, while all there is the escaping of ammonia hidden danger；It inhales
Attached method applies in general to the situation that exhaust gas flow is small, amount of nitrogen oxides is few, but exists and generate adsorbent secondary pollution；Absorption process
It is that sorption enhanced is carried out using water, alkali, acid, generally multi-purpose lye absorbs, there is applied widely, the simple advantage of equipment, but
Nitric oxide can be generated after being absorbed due to nitrogen dioxide, and nitric oxide is absorbed low efficiency, so absorption process is caused to carry out
Nitrous oxides exhaust gas processing, the not high difficulty for the treatment of effeciency.
Utility model content
The purpose of this utility model is to provide a kind of nitrogen oxides treatment devices, to overcome deficiency in the prior art.
To achieve the above object, the utility model provides the following technical solutions:
The embodiment of the present application discloses a kind of device of removal of nitrogen oxide, and described device includes the first suction of two-stage series connection
Tower and second absorption tower are received, first absorb the bottom of the tower is provided with the first air inlet, is provided at the top of first absorption tower
First gas outlet, second air inlet of first gas outlet in the second absorption tower bottom are connected, the second absorption tower
Top is provided with the second gas outlet, and second gas outlet is connected with air-introduced machine.
Preferably, the first absorption midsection is provided with the first spray equipment, the setting of first spray equipment upper end
Have the first demister, first absorption tower is externally connected to the first absorption pump, first liquid outlet of the first absorption pump with
First spray equipment is connected, and the first inlet of first absorption pump is connected with the first absorb the bottom of the tower；Described second absorbs
Midsection is provided with the second spray equipment, and second spray equipment upper end is provided with the second demister, and described second absorbs
Tower is externally connected to the second absorption pump, and second liquid outlet of the second absorption pump is connected with the second spray equipment, and described second inhales
The second inlet for receiving pump is connected with second absorption tower bottom.
Preferably, the first spray equipment and the second spray equipment lower end are provided with filler.
Preferably, first absorption pump is connected with the first absorption liquid bath, and described first absorbs liquid bath and the first dosing pump
Connection, first dosing pump is connected with the first medicine-chest, and first absorption pump is also connected with the second absorption liquid bath, and described second
It absorbs liquid bath to connect with the second dosing pump, second dosing pump is connected with the second medicine-chest；Second absorption pump is connected with
Three absorb liquid bath, and the third absorbs liquid bath and connect with third dosing pump, and the third dosing pump is connected with third medicine-chest.
Preferably, strong oxidant solution is stored in first medicine-chest, stores acid solution in second medicine-chest；
Alkaline solution is stored in the third medicine-chest.
Preferably, it is provided with the first syringe pump between first absorption pump and the first absorption liquid bath, described first absorbs
The second syringe pump is provided in pump and the second absorbing liquid, second absorption pump and third, which absorb, is provided with third absorption in liquid bath
Pump.
Preferably, second absorption pump is connected with the second syringe pump.
The utility model also provides a kind of method of removal of nitrogen oxide, comprising the following steps:
S1: nitrogen oxidation gas is under the drive of air-introduced machine, and into the first absorption tower, the gas is sprayed with first from top to down
The strong oxidant solution of shower device spray and the absorbing liquid of acid solution come into full contact with reaction, then remove degassing through the first demister
Absorbing liquid in body enters second absorption tower by the first gas outlet；
S2: second absorption tower, the gas are entered by the second air inlet through the first scrubbing tower treated nitrogen oxidation gas
It comes into full contact with and reacts with the absorbing liquid of the alkaline solution of the second spray equipment spray from top to down, then go out through the second demister
Absorbing liquid in gas has the discharge of the second gas outlet.
Preferably, the pH value that the third absorbs liquid bath is greater than 12.
Preferably, the strong oxidizer is that the high alkalinity of solubility is molten in water for sodium hypochlorite, sodium chlorite, hydrogen peroxide etc.
Liquid；The acid solution is the acid solutions such as sulfuric acid, nitric acid, hydrochloric acid；The alkaline solution be select sodium hydroxide, potassium hydroxide,
The strong base-weak acid salts such as sodium carbonate, sodium bicarbonate, potassium carbonate, saleratus.
Compared with the prior art, the advantages of the present invention are: process conditions are low temperature, low pressure, reaction condition is mild,
Process is simple, and nitrogen oxides treatment is high-efficient.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application are not making the creative labor according to this for those of ordinary skill in the art
A little attached drawings obtain other attached drawings.
Fig. 1 show the structural schematic diagram of removal of nitrogen oxide device in the utility model specific embodiment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Detailed description, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
Join shown in Fig. 1, the device of removal of nitrogen oxide in the embodiment of the present application, work of the nitrogen oxides tail gas in air-introduced machine 3
Under, successively pass through the absorption tower of two-stage series connection, the bottom on the first absorption tower 1 is equipped with nitrogen oxides inlet exhaust gas, and second absorbs
The top of tower 2 is equipped with the outlet connecting with 3 machine of air inducing.First and second absorption tower middle and upper part is respectively arranged with the first spray equipment
101 and second spray equipment 201, the filler of gas-liquid contact reaction is set below spray equipment.First and second absorbs tower top
Portion is respectively arranged with the first demister 102 and the second demister 202.First absorption tower 1 is externally connected to the first absorption pump 103,
First absorption pump, 103 first liquid outlet is connected with the first spray equipment 101, the first inlet and first of the first absorption pump 103
1 bottom of absorption tower is connected；Second absorption tower 2 is externally connected to the second absorption pump 203,203 second liquid outlet of the second absorption pump with
Second spray equipment 201 is connected, and the second inlet of the second absorption pump 203 is connected with 2 bottom of second absorption tower.First absorption pump
103 are connected with the first absorption liquid bath 107, and the first absorption liquid bath 107 is connect with the first dosing pump 104, the first dosing pump 105 and the
One medicine-chest 106 is connected, and the first absorption pump 103 is also connected with the second absorption liquid bath 109, and described second absorbs liquid bath 109 and second
Dosing pump 110 connects, and the second dosing pump 110 is connected with the second medicine-chest 111；Second absorption pump 203 is connected with third and absorbs liquid bath
205, third absorbs liquid bath 205 and connect with third dosing pump 206, and third dosing pump 206 is connected with third medicine-chest 207.
Preferably, 107,07 absorption pump of the first syringe pump is provided between the first absorption pump 103 and the first absorption liquid bath 104
103 and second are provided with the second syringe pump 107 in absorbing liquid 109, and the second absorption pump 203 and third absorb to be arranged in liquid bath 205
There is the pump of third syringe pump 204.
Nitrogen oxides tail gas enters 1 middle and lower part of the first absorption tower from import, respectively in the first absorption tower 1 and second absorption tower
Adverse current upwards, comes into full contact with top-down absorbing liquid and reacts in 2, by the nox adsorption in tail gas into absorbing liquid,
Then it is discharged after the demister at the top of absorption tower removes the solution droplets carried secretly in gas.
Above-mentioned, each absorption tower configuration absorbent recirculation pump absorbs liquid bath, syringe pump, chemical tank and dosing pump.It absorbs
Absorbing liquid is squeezed into spray equipment by circulating pump, and absorbing liquid is atomized as micron-sized droplet, from top to bottom with the tail gas of rising
Absorbing reaction occurs for counter current contacting.With the progress of reaction, absorbing liquid, syringe pump are supplemented to absorption tower system using syringe pump
Start and stop and absorption tower in liquid level it is chain, maintain absorption tower in absorbing liquid balance.
Through spray equipment atomization, spray in absorption tower, the absorbing liquid ejected need to cover absorption tower and cut above-mentioned absorbing liquid
Face, further, the absorbing liquid covering ejected absorb tower section and reach 200% or more.
The medicament on above-mentioned first absorption tower 1, which uses, has strong oxidizing solution and dilute acid soln.In 106 He of the first chemical tank
The strong oxidant solution and acid solution for storing higher concentration in second medicament case 111 respectively, are separately added into respectively by dosing pump
In self-priming liquidceiver, low concentration strong oxidant solution and acid solution are configured, dosing pump start and stop and absorption liquid level of liquid tank are chain, really
Solution in absorption liquid bath is protected to keep within the set range.
Sodium hypochlorite, sodium chlorite, hydrogen peroxide etc. may be selected in strong oxidizer used in above-mentioned absorbing liquid, and solubility is high in water,
There is the oxidant of strong oxidizing property simultaneously.
Sulfuric acid, nitric acid, hydrochloric acid etc. may be selected in acid solution used in above-mentioned first order absorption liquid.
Solution concentration passes through Density Detection in above-mentioned first absorption liquid bath and the second absorption liquid bath.
The medicament that above-mentioned second absorption tower 2 absorbs uses alkaline solution.Lye is stored in third chemical tank 207, is passed through
Add third Teat pipette 206 that third is added to absorb in liquid bath 205, configure low-concentration alkali liquor, 206 start and stop of third dosing pump and third absorb
205 liquid level of liquid bath is chain, it is ensured that third absorbs solution in liquid bath 205 and keeps within the set range.
When the absorbing liquid pH value that above-mentioned third absorbs liquid bath 205 is down to 9-11,2 bottom of discharge part second absorption tower is needed to inhale
Liquid is received, third syringe pump 204 is opened and supplements absorbing liquid into second absorption tower 2.
Sodium hydroxide, potassium hydroxide may be selected in lye used in above-mentioned 207 absorbing liquid of third chemical tank, and carbonic acid can also be used
The strong base-weak acid salts such as sodium, sodium bicarbonate, potassium carbonate, saleratus.It is preferred that the solubility in water such as sodium hydroxide, potassium hydroxide
Alkaline solution high, saturated vapour pressure is high.
Above-mentioned third absorbs solution concentration in liquid bath 205 and passes through Density Detection.
Further, it can be exported in strong oxidizer syringe pump 108 and increase pipeline all the way, added into second level absorption tower 2
Strong oxidant solution, by the oxidation of nitric oxide generated after nitrogen oxide in tail gas and alkaline reaction at nitrogen dioxide, more conducively
Lye absorbs the nitrogen oxides in tail gas, improves the treatment effeciency of nitrogen oxides tail gas.
The utility model realizes the processing of nitrogen oxides tail gas using the above method, by the nitric oxide oxygen in tail gas
Change, then absorbed using lye, entire process conditions are low temperature, low pressure, and reaction condition is mild, and process is simple, at nitrogen oxides
It manages high-efficient.
Embodiment one:
The chemical industry tail gas of a certain nitrogen-containing oxide, amount of nitrogen oxides 940.6mg/m3, wherein content of nitric oxide
For 94.4mg/m3, nitrogen dioxide content 846.2mg/m3, under the action of air-introduced machine 3, sequentially enter concatenated first and absorb
Tower 1 and second absorption tower 2.
Spray equipment is arranged in first absorption tower 1 and 3 middle and upper part of second absorption tower, and spray equipment connects respective absorbent recirculation pump
And liquid outlet, the filler of gas-liquid contact reaction is set below spray；It is arranged at the top of first absorption tower 1 and second absorption tower 2 and removes
Day with fog.Nitrogen oxides tail gas is sent into multi-functional washing absorption plant middle and lower part from 1 import of the first absorption tower, absorbs respectively first
Adverse current upwards, comes into full contact with top-down absorbing liquid and reacts in tower 1 and second absorption tower 2, then by the top of absorption tower
Demister remove the solution droplets carried secretly in gas.
Absorbing liquid covers 1 He of the first absorption tower through spray equipment atomization, spray in first absorption tower 1 and second absorption tower 2
2 sectional area of second absorption tower is 220%.
The strong oxidizer that first absorption tower 1 uses stores 25% chlorous acid for sodium chlorite in the first chemical tank 106
Sodium solution is added first by the first dosing pump 105 and absorbs in liquid bath 104, sodium chlorite solution configured, with the chlorous acid postponed
Sodium solution density is 1.19mg/L, is added in the first absorption tower 1 by the first syringe pump 107；The acidity that first absorption tower 1 uses
Solution is sulfuric acid, and 90% sulfuric acid solution is stored in second medicament case 111, is added second by the second dosing pump 110 and absorbs
In liquid bath 109, sulfuric acid solution is configured, is 1.8mg/L with the sulfuric acid solution density postponed, is added the by the second syringe pump 108
In one absorption tower.
The lye that second absorption tower 2 uses stores 25% hydrogen-oxygen for sodium hydroxide solution in third level chemical tank 207
Change sodium solution, third is added by third dosing pump 206 and is absorbed in liquid bath 205, sodium hydroxide solution is configured, with the hydrogen-oxygen postponed
Change sodium solution density is 1.27mg/L, is added in second absorption tower 2 by third syringe pump 204；Absorption in second absorption tower 2
Liquid pH value is controlled 12 or more.
Increase pipeline all the way in the outlet of the first syringe pump 1107, the Asia that density is 1.19mg/L is added into second absorption tower
Sodium chlorate solution, by the oxidation of nitric oxide generated after nitrogen oxide in tail gas and alkaline reaction at nitrogen dioxide.
Nitrogen oxides tail gas by the first absorption tower 1 and 2 absorbing reaction of second absorption tower purification after, absorption tower 2 export
Nitrous oxides concentration is down to 47mg/m in purified gas3, nitrogen oxides treatment efficiency reaches 95% or more.
As stated above, processing nitrogen oxides tail gas method provided by the utility model, process conditions be low temperature, low pressure, instead
Mild condition is answered, process is simple, and nitrogen oxides treatment is high-efficient.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including element.
The above is only the specific embodiments of the application, it is noted that those skilled in the art are come
It says, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as
The protection scope of the application.
Claims (7)
1. a kind of device of removal of nitrogen oxide, it is characterised in that: described device includes the first absorption tower and of two-stage series connection
Two absorption towers, first absorb the bottom of the tower are provided with the first air inlet, are provided with the first outlet at the top of first absorption tower
Mouthful, second air inlet of first gas outlet in the second absorption tower bottom is connected, setting at the top of the second absorption tower
There is the second gas outlet, second gas outlet is connected with air-introduced machine.
2. a kind of device of removal of nitrogen oxide according to claim 1, it is characterised in that: described first absorbs midsection
It is provided with the first spray equipment, first spray equipment upper end is provided with the first demister, outside first absorption tower
It is connected with the first absorption pump, first liquid outlet of the first absorption pump is connected with the first spray equipment, first absorption pump
First inlet is connected with the first absorb the bottom of the tower；The second absorption tower middle section is provided with the second spray equipment, and described second
Spray equipment upper end is provided with the second demister, and the second absorption tower is externally connected to the second absorption pump, and described second inhales
It receives the second liquid outlet of pump to be connected with the second spray equipment, the second inlet and the second absorption tower bottom phase of second absorption pump
Even.
3. a kind of device of removal of nitrogen oxide according to claim 2, it is characterised in that: the first spray equipment and second
Spray equipment lower end is provided with filler.
4. a kind of device of removal of nitrogen oxide according to claim 2, it is characterised in that: the first absorption pump connection
There is the first absorption liquid bath, the first absorption liquid bath is connect with the first dosing pump, and first dosing pump is connected with the first medicine-chest,
First absorption pump is also connected with the second absorption liquid bath, and the second absorption liquid bath is connect with the second dosing pump, and described second
Dosing pump is connected with the second medicine-chest；Second absorption pump is connected with third and absorbs liquid bath, and the third absorbs liquid bath and third
Dosing pump connection, the third dosing pump are connected with third medicine-chest.
5. a kind of device of removal of nitrogen oxide according to claim 4, it is characterised in that: stored in first medicine-chest
There is strong oxidant solution, stores acid solution in second medicine-chest；Alkaline solution is stored in the third medicine-chest.
6. a kind of device of removal of nitrogen oxide according to claim 4, it is characterised in that: first absorption pump and
It is provided with the first syringe pump between one absorption liquid bath, is provided with the second syringe pump in first absorption pump and the second absorbing liquid,
Second absorption pump and third, which absorb in liquid bath, is provided with third absorption pump.
7. a kind of device of removal of nitrogen oxide according to claim 6, it is characterised in that: second absorption pump and
Two syringe pumps are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821608154.9U CN208878244U (en) | 2018-09-30 | 2018-09-30 | A kind of device of removal of nitrogen oxide |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821608154.9U CN208878244U (en) | 2018-09-30 | 2018-09-30 | A kind of device of removal of nitrogen oxide |
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| CN208878244U true CN208878244U (en) | 2019-05-21 |
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| CN201821608154.9U Active CN208878244U (en) | 2018-09-30 | 2018-09-30 | A kind of device of removal of nitrogen oxide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108939858A (en) * | 2018-09-30 | 2018-12-07 | 张家港市艾尔环保工程有限公司 | A kind of device and its application method of removal of nitrogen oxide |
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2018
- 2018-09-30 CN CN201821608154.9U patent/CN208878244U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108939858A (en) * | 2018-09-30 | 2018-12-07 | 张家港市艾尔环保工程有限公司 | A kind of device and its application method of removal of nitrogen oxide |
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