CN105327608B - The retracting device and method of the smoke of gunpowder in a kind of nitrocotton production process - Google Patents
The retracting device and method of the smoke of gunpowder in a kind of nitrocotton production process Download PDFInfo
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- CN105327608B CN105327608B CN201510817380.2A CN201510817380A CN105327608B CN 105327608 B CN105327608 B CN 105327608B CN 201510817380 A CN201510817380 A CN 201510817380A CN 105327608 B CN105327608 B CN 105327608B
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Abstract
The present invention relates to nitrocotton production exhaust-gas treatment field, purpose is to provide the processing unit and method of the smoke of gunpowder in a kind of nitrocotton production process, including the first absorptive unit, the second absorptive unit, the 3rd absorptive unit, air exhauster and the first densimeter, the second densimeter；First absorptive unit includes water absorption tower；Second absorptive unit includes the water absorption tower of at least two series connection, is arranged on station and series connection with it after the first absorptive unit；It is urea, the absorption tower of hydrogen peroxide mixed solution that 3rd absorptive unit, which includes at least one absorbent, is arranged on station and series connection with it after the second absorptive unit；Export for 60% nitric acid after first densimeter, exported after the second densimeter for 30% nitric acid；Using multi-stage water wash processing and urea, dioxygen water process, secondary pollution is not caused in whole processing procedure；The nitric acid of two kinds of concentration can be simultaneously provided, extension nitric acid user, the normal operation for ensuring smoke of gunpowder recovery system, improve the economic benefit that the smoke of gunpowder reclaims.
Description
Technical field
The present invention relates to nitrocotton production exhaust-gas treatment field, more particularly in a kind of nitrocotton production process the smoke of gunpowder place
Reason method.
Background technology
Cellulose nitrate, nitrocotton or nitrocellulose are commonly called as, are the product of cellulose and nitric acid reaction, molecular formula is
C6H7O2(ONO2)a(OH)3-an, wherein a is esterification degree, and n is the degree of polymerization.Nitrocotton is used primarily for military domain, is manufacture transmitting
Medicine, guided missile, the important source material of propellant；With the development of science and technology, the application of nitrocotton is no longer limited to military production
On product, and the every aspect of daily life is embodied in, such as Automobile paint, solid alcohol and electronic product bonding agent.
The preparation process of nitrocotton is mainly as follows at present：Purified cotton occurs nitration reaction with nitration mixture and generates acid nitrocotton,
Carry out driving acid by centrifugation, then it is washed with water with dust technology, then the instability of product is handled, carried out afterwards
Cutting, mixed batch is carried out by fine purifiation, to mixed batch of nitrocotton slagging-off iron removaling, and then concentrated, finally centrifuged by piston material pushing
Packed after machine dehydration.Because nitric acid belongs to volatile substances, sour process is driven in nitration mixture process for preparation, nitration reaction process, centrifugation
And boil wash during can all produce oxides of nitrogen gas, the i.e. smoke of gunpowder.It is right if being directly discharged to pollute and waste in air
Human body damages, it is therefore necessary to recycle.
The processing method of the smoke of gunpowder can be divided into by the species of adsorbent：Water absorption method, sour absorption process, Alkali absorption method, oxidation
Thing absorption process etc..The Chinese patent of Application No. 201210512696.7 discloses a kind of processing method of nitrous oxides exhaust gas,
This method includes pickling unit, washing unit and caustic wash unit, reaches waste gas emission compliance by absorbing step by step；But in alkali cleaning
Unit can produce industrial waste salt, cause secondary pollution and the nitric acid rate of recovery low；Because of smoke of gunpowder amount caused by nitrocotton production process
Greatly, thus generation dust technology amount it is big, the dust technology concentration obtained with this method is low, and nitric acid user is single, takes out difficult, influences
The normal operation of smoke of gunpowder recovery, and reduce the economic benefit of nitrocotton production.
The content of the invention
The technical problems to be solved by the invention are to provide the retracting device of the smoke of gunpowder and side in a kind of nitrocotton production process
Method, can be in order to avoid with Alkali absorption agent, while produces the nitric acid of two kinds of concentration, it is ensured that smoke of gunpowder recovery system normal operation.
The technical solution adopted for the present invention to solve the technical problems is：The recovery of the smoke of gunpowder in a kind of nitrocotton production process
Device, the retracting device of the smoke of gunpowder includes in the nitrocotton production process：First absorptive unit, the second absorptive unit, the 3rd inhale
Receive unit, air exhauster and the first densimeter, the second densimeter；First absorptive unit includes the absorption tower that absorbent is water；
The absorbent that second absorptive unit includes at least two series connection is the absorption tower of water, is arranged on station after the first absorptive unit
And series connection with it；3rd absorptive unit includes at least one absorbent for urea, the absorption tower of hydrogen peroxide mixed solution, if
Put station and series connection with it after the second absorptive unit；
Each absorb the bottom of the tower of first absorptive unit, the second absorptive unit and the 3rd absorptive unit is entered provided with the smoke of gunpowder
Mouth, the first inlet, the first liquid outlet and the second liquid outlet, each absorption tower top are provided with smoke of gunpowder outlet, the second inlet,
Smoke of gunpowder outlet is connected with the latter absorb the bottom of the tower smoke of gunpowder import by pipeline at the top of each absorption tower, each absorption tower
First liquid outlet of bottom is connected with the first inlet of previous absorb the bottom of the tower by pipeline, and the pipeline is provided with valve；
Smoke of gunpowder outlet is exhaust port at the top of the absorption tower of 3rd absorptive unit；Each absorption tower sets a circulating pump, circulation
Pump inlet is connected by pipeline with the liquid outlet of absorb the bottom of the tower second, exports and lead to the second inlet at the top of the absorption tower
Piping connects；Water or dust technology import are set on the first absorptive unit absorption tower circulating-pump outlet pipeline；Described second
Water inlet is set on the circulating-pump outlet pipeline on last absorption tower of absorptive unit；Last suction of 3rd absorptive unit
Receive and urea, hydrogen peroxide mixed solution import are set on the circulating-pump outlet pipeline of tower；The air exhauster import produced with coming from
Smoke of gunpowder outlet connection in journey, the air exhauster outlet are connected with the first absorptive unit absorb the bottom of the tower smoke of gunpowder import；
First liquid outlet of the first absorptive unit absorb the bottom of the tower is connected with acid output pipeline, is set on the acid output pipeline
The first densimeter is equipped with, valve is provided with after first densimeter；Second absorptive unit the first two absorb the bottom of the tower
First liquid outlet is connected with acid output pipeline, and the second densimeter is provided with the acid output pipeline, is set after second densimeter
There is valve.
Preferably, the absorption tower of second absorptive unit is 4.
Preferably, the absorption tower of the 3rd absorptive unit is 2.
The recovery method of the smoke of gunpowder, comprises the following steps in a kind of nitrocotton production process：
(1) valve closed on the first absorptive unit and the second absorptive unit absorption tower connecting pipe, absorbed to first single
First absorption tower adds water to the 10-30% of absorbing tower liquid-level, starts circulating pump, and water from top to bottom circulates in absorption tower；
(2) added water to from water inlet on the second absorptive unit absorption tower circulating pump into each absorption tower of the second absorptive unit
The 10-30% of absorbing tower liquid-level, starts the circulating pump on each absorption tower, and water from top to bottom circulates in absorption tower；
(3) smoke of gunpowder from production process enters the through air exhauster by the absorb the bottom of the tower smoke of gunpowder import of the first absorptive unit
The absorption tower of one absorptive unit, is washed；When the first pycnometer specific gravity is more than or equal to 1.37, the first densimeter late gate is beaten
Open, go out the nitric acid that concentration is 60%, by the water inlet moisturizing on circulating pump pipeline, it is 10-30% to make the absorbing tower liquid-level；
(4) gas obtained after step (3) processing is entered by the smoke of gunpowder of first absorb the bottom of the tower of the second absorptive unit
Mouth is sent into absorption tower, is further washed, and when the second pycnometer specific gravity is more than or equal to 1.18, the second densimeter late gate is beaten
Open, go out the nitric acid that concentration is 30%, by the water on circulating pump pipeline or dust technology import moisturizing, make the absorbing tower liquid-level be
10-30%；
(5) mixed liquor of urea and hydrogen peroxide is injected to the 10-30% of absorbing tower liquid-level to the 3rd absorptive unit absorption tower,
Start circulating pump, mixed liquor falls from the inlet sprinkling at the top of the absorption tower, circulation, is obtained after step (4) is washed
Gas is passed through the absorption tower of the 3rd absorptive unit, after urea and dioxygen water mixed liquid further absorption processing, nitrogen oxygen in gas
Compound concentration is less than or equal to 800ppm, is discharged into air.
Preferably, go out in the step (3) the first absorptive unit absorbing tower liquid-level after acid it is low when, open first and absorb
Valve on unit and the second absorptive unit absorption tower connecting pipe, the first absorption is added to by the dust technology of the second absorptive unit
The absorption tower of unit.
Preferably, the rate of water make-up of the absorptive unit of step (4) second is 400-3000L/h in process of production.
Preferably, the mass concentration of urea is 8-12% in urea described in step (5) and dioxygen water mixed liquid, hydrogen peroxide
Mass concentration be 3-6%.
Preferably, after the step (5) processing, nitrous oxides concentration is 500-800ppm in gas.
The beneficial effects of the invention are as follows：The recovery method of the smoke of gunpowder in nitrocotton production process provided by the invention, using more
Level washing process and urea, dioxygen water process, there is no industrial waste salt generation in whole processing procedure, absorb other absorbents not
The nitric oxide easily absorbed, does not cause secondary pollution, discarded to reach discharging standards；The present invention can provide simultaneously two kinds it is dense
The nitric acid of degree, i.e., 30% and 60% nitric acid, nitric acid user is extended, meet the sale demand of nitric acid product, it is ensured that the smoke of gunpowder reclaims
The normal operation of system, improve the economic benefit of smoke of gunpowder recovery.
Brief description of the drawings
Fig. 1 is provided by the invention 21 structural representation；
In figure mark for：1st, the first absorptive unit, 1a, absorption tower, 11, smoke of gunpowder import, the 12, first inlet, 13, first
Liquid outlet, the 14, second liquid outlet, 15, smoke of gunpowder outlet, the 16, second inlet；2nd, the second absorptive unit, 2a, absorption tower, 21,
Smoke of gunpowder import, the 22, first inlet, the 23, first liquid outlet, the 24, second liquid outlet, 25, smoke of gunpowder outlet, the 26, second feed liquor
Mouthful；3rd, the 3rd absorptive unit, 3a, urea, hydrogen peroxide mixed solution absorption tower, 31, smoke of gunpowder import, the 32, first inlet, 33,
First liquid outlet, the 34, second liquid outlet, 35, smoke of gunpowder outlet, the 36, second inlet, 4, air exhauster, the 5, first densimeter, 6,
Second densimeter, 7, circulating pump, 8, water or dust technology import, 9, water inlet, 10, urea, hydrogen peroxide mixed solution import.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
Smoke of gunpowder retracting device structural representation in nitrocotton production process of the invention as shown in Figure 1, nitrocotton production
During the retracting device of the smoke of gunpowder include：First absorptive unit 1, the second absorptive unit 2, the 3rd absorptive unit 3, air exhauster 4 and
First densimeter 5, the second densimeter 6；First absorptive unit 1 includes the absorption tower 1a that absorbent is water；Described second inhales
Receive unit 2 include at least two series connection absorbents be water absorption tower 2a, be arranged on after the first absorptive unit 1 station and and its
Series connection；It is urea, the absorption tower 3a of hydrogen peroxide mixed solution that 3rd absorptive unit 3, which includes at least one absorbent, is set
Station and series connection with it after the second absorptive unit 2.
Each absorb the bottom of the tower of first absorptive unit 1, the second absorptive unit 2 and the 3rd absorptive unit 3 is provided with nitre
Cigarette import, the first inlet, the first liquid outlet and the second liquid outlet, each absorption tower top are entered provided with smoke of gunpowder outlet, second
Liquid mouth, each absorption tower top smoke of gunpowder outlet is connected with the latter absorb the bottom of the tower smoke of gunpowder import by pipeline, each
First liquid outlet of absorb the bottom of the tower is connected with the first inlet of previous absorb the bottom of the tower by pipeline, and the pipeline is provided with
Valve, when previous absorbing tower liquid-level deficiency, the valve is opened, from the latter absorption tower to previous absorption tower replenisher
Position；Smoke of gunpowder outlet 35 is exhaust port at the top of the absorption tower of 3rd absorptive unit 3；Each absorption tower sets a circulating pump
7, the import of circulating pump 7 is connected by pipeline with the liquid outlet of absorb the bottom of the tower second, exported and at the top of the absorption tower second
Inlet is connected by pipeline；Described first absorbs setting water or dust technology import on single 1 yuan of outlet conduit of absorption tower circulating pump 7
8；Water inlet 9 is set on the outlet conduit of circulating pump 7 on last absorption tower of the second absorptive unit 2；Described 3rd absorbs
Urea, hydrogen peroxide mixed solution import 10 are set on the outlet conduit of circulating pump 7 on last absorption tower of unit 3；The exhausting
The import of machine 4 is connected with the smoke of gunpowder outlet in production process, the outlet of air exhauster 4 and first absorptive unit 1
The smoke of gunpowder import connection of water absorption tower 1a bottoms.
First liquid outlet of the absorb the bottom of the tower of the first absorptive unit 1 is connected with acid output pipeline, on the acid output pipeline
The first densimeter 5 is provided with, valve is provided with after first densimeter 5；The first two absorption tower bottom of second absorptive unit 2
First liquid outlet in portion is connected with acid output pipeline, and the second densimeter 6, second densimeter 6 are provided with the acid output pipeline
After be provided with valve.
The direction of arrow is gas, the flow direction of liquid in figure.
Embodiment 1：
As shown in figure 1, smoke of gunpowder retracting device structural representation in nitrocotton production process of the invention as shown in Figure 1,
The retracting device of the smoke of gunpowder includes in nitrocotton production process：First absorptive unit 1, the second absorptive unit 2, the 3rd absorptive unit 3,
The densimeter 5 of air exhauster 4 and first, the second densimeter 6；First absorptive unit 1 includes the absorption tower 1a that absorbent is water；Institute
State the second absorptive unit 2 include 4 series connection absorbents be water absorption tower 2a, station is simultaneously after being arranged on the first absorptive unit 1
Series connection with it；3rd absorptive unit 3 is included to the absorption tower 3a that two absorbents are urea, hydrogen peroxide mixed solution, if
Put station and series connection with it after the second absorptive unit 2.
The water absorption tower 1a bottoms of first absorptive unit 1 are provided with smoke of gunpowder import 11, the first inlet 12, the first liquid outlet
13 and second liquid outlet 14, top be provided with smoke of gunpowder outlet 15, the second inlet 16；The water absorption tower 2a of second absorptive unit 2
Bottom is provided with smoke of gunpowder import 21, the first inlet 22, the first liquid outlet 23 and the second liquid outlet 24, and top is provided with smoke of gunpowder outlet
25th, the second inlet 26；The water absorption tower 3a bottoms of 3rd absorptive unit 3 are provided with smoke of gunpowder import 31, the first inlet 32, first
The liquid outlet 34 of liquid outlet 33 and second, top are provided with smoke of gunpowder outlet 35, the second inlet 36.
Smoke of gunpowder outlet is connected with the latter absorb the bottom of the tower smoke of gunpowder import by pipeline at the top of each absorption tower, each suction
The first liquid outlet for receiving tower bottom is connected with the first inlet of previous absorb the bottom of the tower by pipeline, and the pipeline is provided with valve
Door；Smoke of gunpowder outlet 35 is exhaust port at the top of the absorption tower of 3rd absorptive unit 3；Each absorption tower sets a circulating pump
7, the import of circulating pump 7 is connected by pipeline with the liquid outlet of absorb the bottom of the tower second, exported and at the top of the absorption tower second
Inlet is connected by pipeline；Described first absorbs setting water or dust technology import on single 1 yuan of outlet conduit of absorption tower circulating pump 7
8；Water inlet 9 is set on the outlet conduit of circulating pump 7 on last absorption tower of the second absorptive unit 2；Described 3rd absorbs
Urea, hydrogen peroxide mixed solution import 10 are set on the outlet conduit of circulating pump 7 on last absorption tower of unit 3；The exhausting
The import of machine 4 is connected with the smoke of gunpowder outlet in production process, the outlet of air exhauster 4 and first absorptive unit 1
The smoke of gunpowder import connection of absorption tower 1a bottoms, air exhauster 4 is the power source of processing gas flowing, makes the smoke of gunpowder in production system
Into the absorption tower 1a processing of the first absorptive unit 1.
First liquid outlet 13 of the absorb the bottom of the tower of the first absorptive unit 1 is connected with acid output pipeline, the acid output pipeline
On be provided with the first densimeter 5, be provided with valve after first densimeter 5；The first two of second absorptive unit 2 washing is inhaled
The first liquid outlet 23 for receiving tower 2a bottoms is connected with acid output pipeline, is provided with the second densimeter 6 on the acid output pipeline, and described the
Valve is provided with after two densimeters 6.
Smoke of gunpowder recovery method comprises the following steps in nitrocotton production process provided by the invention：
(1) valve closed on the first absorptive unit 1 and the absorption tower connecting pipe of the second absorptive unit 2, absorbed to first
The absorption tower of unit 1 adds water to the 10-30% of absorbing tower liquid-level, starts circulating pump 7, water from top to bottom circulates in absorption tower；
(2) each inhaled to the second absorptive unit 2 from water inlet 9 on the second absorptive unit 2 last absorption tower circulating pump 7
The 10-30% that absorbing tower liquid-level is added water in tower is received, starts the circulating pump 7 on each absorption tower, water is in absorption tower by upper
To lower circulation；
(3) absorption tower 1a bottom smoke of gunpowder import 11 of the smoke of gunpowder from production process through air exhauster 4 by the first absorptive unit 1
Into the absorption tower 1a of the first absorptive unit 1, washed；When the proportion of the first densimeter 5 is more than or equal to 1.37, the first proportion
5 late gates opening is counted, goes out the nitric acid that concentration is 60%, passes through the water on circulating pump pipeline or the moisturizing of dust technology import 8 or dilute nitre
Acid, it is 10-30% to make the absorbing tower liquid-level；
In this step, most nitrogen oxides is only absorbed by the water in the smoke of gunpowder from nitrocotton production system, generation
Salpeter solution, when reaction solution concentration reaches 60%, take salpeter solution take-away away, supplement water or dust technology to absorption tower 1a, follow
Ring works, and reaction equation is as follows：
2NO+O2=2NO2、2NO2+H2O=2HNO3
Because production system is unstable, the smoke of gunpowder amount sent is unstable, if the nitric acid of continuous production 60%, can influence concentration of nitric acid
Uniformity, therefore when smoke of gunpowder amount is smaller in production system, can the outlet of the nitric acid of temporary close 60%, produce 30% nitric acid；
When smoke of gunpowder amount is big and stablizes, 60% nitric acid is produced；
(4) gas obtained after step (3) processing is entered by the smoke of gunpowder of first absorb the bottom of the tower of the second absorptive unit 2
Mouth 21 is sent into absorption towers, is further washed, when the proportion of the second densimeter 6 is more than or equal to 1.18, valve after the second densimeter 6
Door is opened, and goes out the nitric acid that concentration is 30%, by the moisturizing of water inlet 9 on the pipeline of circulating pump 7, makes the absorbing tower liquid-level be
10-30%；
(5) to the mixed liquor of the absorption tower of the 3rd absorptive unit 3 injection urea and hydrogen peroxide to the 10- of absorbing tower liquid-level
30%, the mass concentration of urea is 8-12% in urea and the dioxygen water mixed liquid, and the mass concentration of hydrogen peroxide is 3-6%,
Start circulating pump 7, mixed liquor falls from the inlet sprinkling at the top of the absorption tower, circulation, is obtained after step (4) is washed
Gas is passed through the absorption tower of the 3rd absorptive unit 3, after urea and dioxygen water mixed liquid further absorption processing, nitrogen oxygen in gas
Compound concentration is less than or equal to 800ppm, is discharged into air；The concentration of urea and dioxygen water mixed liquid is reduced, is discharged into the gas of air
When nitrous oxides concentration raises, the absorbing liquid of third unit 3 is discharged by the first liquid outlet, is sent to the second absorptive unit 2 most
The latter absorption tower, the mixed liquor of urea and hydrogen peroxide is supplemented the 3rd absorptive unit 3 again；
In this step, the reaction equation of urea liquid absorbing NOx is as follows：
6NO2+4(NH2)2CO=7N2+4CO2+8H2O
6NO+2(NH2)2CO=5N2+2CO2+4H2O
Hydrogen peroxide is as oxidant, by oxidation of nitric oxide into the nitrogen dioxide being easily only absorbed by the water；Urea, dioxygen are water-soluble
Liquid handles nitrogen oxides remaining in tail gas as absorbent, absorbs the nitric oxide that other absorbents are not easy to absorb；Instead
It is N to answer product2、CO2、H2O, and without side reaction, secondary pollution is not caused to environment.
Embodiment 2：
Smoke of gunpowder retracting device such as embodiment 1, recovery method include following step in nitrocotton production process provided by the invention
Suddenly：
(1) valve opened on the first absorptive unit 1 and the absorption tower connecting pipe of the second absorptive unit 2 is closed, by second
Water inlet 9 is into the absorption tower of the second absorptive unit 2 plus water on last the absorption tower circulating pump 7 of absorptive unit 2, water adverse current to the
One absorptive unit 1, after water absorption tower 1a liquid levels reach 10-30%, close the first absorptive unit 1 and the second absorptive unit 2
Valve on the connecting pipe of absorption tower, start circulating pump 7, water from top to bottom circulates in absorption tower；
(2) treat that 2 each absorbing tower liquid-level of the second absorptive unit reaches 10-30%, start the circulation on each absorption tower
Pump 7, water from top to bottom circulates in absorption tower；
(3) absorption tower 1a bottom smoke of gunpowder import 11 of the smoke of gunpowder from production process through air exhauster 4 by the first absorptive unit 1
Into the absorption tower 1a of the first absorptive unit 1, washed；When the proportion of the first densimeter 5 is more than or equal to 1.37, the first proportion
5 valves are opened after meter, go out the nitric acid that concentration is 60%, go out the water absorption tower 1a liquid levels after acid it is low when, open first and absorb
Valve on the absorption tower connecting pipe of 1 and second absorptive unit of unit 2, the dust technology of the second absorptive unit 2 is added to first
The absorption tower of absorptive unit, makes the absorption tower 1a liquid levels of the first absorptive unit 1 remain 10-30%；
(4) gas obtained after step (3) processing is entered by the smoke of gunpowder of first absorb the bottom of the tower of the second absorptive unit 2
Mouth 21 is sent into absorption towers, is further washed, when the proportion of the second densimeter 6 is more than or equal to 1.18, valve after the second densimeter 6
Door is opened, and goes out the nitric acid that concentration is 30%, by the moisturizing of water inlet 9 on the pipeline of circulating pump 7, makes the absorbing tower liquid-level be
10-30%, the rate of water make-up of the second absorptive unit 2 is 400-3000L/h；
(5) urea and hydrogen peroxide are injected to the absorption tower of the 3rd absorptive unit 3 from urea, hydrogen peroxide mixed solution import 10
For mixed liquor to the 10-30% of absorbing tower liquid-level, the mass concentration of urea is 8-12% in urea and the dioxygen water mixed liquid, double
The mass concentration of oxygen water is 3-6%, starts circulating pump 7, and mixed liquor falls from the inlet sprinkling at the top of the absorption tower, followed
Ring, the gas obtained after step (4) is washed are passed through the absorption tower of the 3rd absorptive unit 3, entered with urea and dioxygen water mixed liquid
After one step absorption processing, nitrous oxides concentration is 500-800ppm in gas, is discharged into air.
Claims (6)
- A kind of 1. retracting device of the smoke of gunpowder in nitrocotton production process, it is characterised in that the smoke of gunpowder in the nitrocotton production process Retracting device include：First absorptive unit, the second absorptive unit, the 3rd absorptive unit, air exhauster and the first densimeter, second Densimeter；First absorptive unit includes the absorption tower that absorbent is water；Second absorptive unit includes the suction of 4 series connection The absorption tower that agent is water is received, is arranged on station and series connection with it after the first absorptive unit；3rd absorptive unit includes 2 suctions Receipts agent is urea, the absorption tower of hydrogen peroxide mixed solution, is arranged on station and series connection with it after the second absorptive unit；Each absorb the bottom of the tower of first absorptive unit, the second absorptive unit and the 3rd absorptive unit be provided with smoke of gunpowder import, First inlet, the first liquid outlet and the second liquid outlet, each absorption tower top are provided with smoke of gunpowder outlet, the second inlet, institute State smoke of gunpowder outlet at the top of each absorption tower to be connected by pipeline with the latter absorb the bottom of the tower smoke of gunpowder import, each absorption tower bottom First liquid outlet in portion is connected with the first inlet of previous absorb the bottom of the tower by pipeline, and the pipeline is provided with valve；The Smoke of gunpowder outlet is exhaust port at the top of the absorption tower of three absorptive units；Each absorption tower sets a circulating pump, circulating pump Import is connected with the liquid outlet of absorb the bottom of the tower second by pipeline, is exported and is passed through with the second inlet at the top of the absorption tower Pipeline connects；Water or dust technology import are set on the first absorptive unit absorption tower circulating-pump outlet pipeline；Described second inhales Receive and water inlet is set on the circulating-pump outlet pipeline on last absorption tower of unit；Last absorption of 3rd absorptive unit Urea, hydrogen peroxide mixed solution import are set on the circulating-pump outlet pipeline of tower；The air exhauster import is with coming from production process In the connection of smoke of gunpowder outlet, air exhauster outlet is connected with the first absorptive unit absorb the bottom of the tower smoke of gunpowder import；First liquid outlet of the first absorptive unit absorb the bottom of the tower is connected with acid output pipeline, is provided with the acid output pipeline First densimeter, valve is provided with after first densimeter；The first of second absorptive unit the first two absorb the bottom of the tower Liquid outlet is connected with acid output pipeline, and the second densimeter is provided with the acid output pipeline, valve is provided with after second densimeter Door.
- 2. the recovery method of the smoke of gunpowder in a kind of nitrocotton production process, it is characterised in that this method is using described in claim 1 The retracting device of the smoke of gunpowder, this method comprise the following steps in a kind of nitrocotton production process：(1) valve closed on the first absorptive unit and the second absorptive unit absorption tower connecting pipe, inhaled to the first absorptive unit The 10-30% that tower adds water to absorbing tower liquid-level is received, starts circulating pump, water from top to bottom circulates in absorption tower；(2) absorption is added water into each absorption tower of the second absorptive unit from water inlet on the second absorptive unit absorption tower circulating pump The 10-30% of tower liquid level, starts the circulating pump on each absorption tower, and water from top to bottom circulates in absorption tower；(3) smoke of gunpowder from production process enters first by the absorb the bottom of the tower smoke of gunpowder import of the first absorptive unit through air exhauster and inhaled The absorption tower of unit is received, is washed；When the first pycnometer specific gravity is more than or equal to 1.37, the first densimeter late gate is opened, Go out the nitric acid that concentration is 60%, by the water inlet moisturizing on circulating pump pipeline, make the absorption tower liquid of first absorptive unit Position is 10-30%；(4) gas obtained after step (3) processing is sent by the smoke of gunpowder import of first absorb the bottom of the tower of the second absorptive unit Enter absorption tower, further washed, when the second pycnometer specific gravity is more than or equal to 1.18, the second densimeter late gate is opened, Go out the nitric acid that concentration is 30%, by the water on circulating pump pipeline or dust technology import moisturizing, make second absorptive unit Absorbing tower liquid-level is 10-30%；(5) start to the mixed liquor of the 3rd absorptive unit absorption tower injection urea and hydrogen peroxide to the 10-30% of absorbing tower liquid-level Circulating pump, mixed liquor falls from the inlet sprinkling at the top of the absorption tower, circulation, the gas obtained after step (4) is washed The absorption tower of the 3rd absorptive unit is passed through, after urea and dioxygen water mixed liquid further absorption processing, nitrogen oxides in gas Concentration is less than or equal to 800ppm, is discharged into air.
- 3. the recovery method of the smoke of gunpowder in a kind of nitrocotton production process according to claim 2, it is characterised in that the step Suddenly go out in (3) the first absorptive unit absorbing tower liquid-level after acid it is low when, open the first absorptive unit and the second absorptive unit inhaled The valve on tower connecting pipe is received, the dust technology of the second absorptive unit is added to the absorption tower of the first absorptive unit.
- 4. the recovery method of the smoke of gunpowder in a kind of nitrocotton production process according to claim 2, it is characterised in that producing During the rate of water make-up of the absorptive unit of step (4) second be 400-3000L/h.
- 5. the recovery method of the smoke of gunpowder in a kind of nitrocotton production process according to claim 2, it is characterised in that step (5) mass concentration of urea is 8-12% in urea described in and dioxygen water mixed liquid, and the mass concentration of hydrogen peroxide is 3-6%.
- 6. the recovery method of the smoke of gunpowder in a kind of nitrocotton production process according to claim 5, it is characterised in that described in warp After step (5) processing, nitrous oxides concentration is 500-800ppm in gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510817380.2A CN105327608B (en) | 2015-11-20 | 2015-11-20 | The retracting device and method of the smoke of gunpowder in a kind of nitrocotton production process |
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| CN201510817380.2A CN105327608B (en) | 2015-11-20 | 2015-11-20 | The retracting device and method of the smoke of gunpowder in a kind of nitrocotton production process |
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| CN105327608A CN105327608A (en) | 2016-02-17 |
| CN105327608B true CN105327608B (en) | 2018-03-09 |
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| CN106215627A (en) * | 2016-08-30 | 2016-12-14 | 安徽金禾实业股份有限公司 | A kind of method of hydrogen peroxide liquid oxidatively absorption process treatment of nitric acid tail gas |
| CN108404629A (en) * | 2018-02-01 | 2018-08-17 | 高博集团有限公司 | A kind of filter case phosphatization exhaust treatment system |
| CN110605004A (en) * | 2019-08-30 | 2019-12-24 | 南京鹳山化工科技有限公司 | Internode external circulation low-pressure multistage smoke absorption device and process |
| CN112823853A (en) * | 2019-11-20 | 2021-05-21 | 中昊晨光化工研究院有限公司 | Method and device for treating nitrogen oxides in tail gas generated by plasma cracking of organic fluorine |
| CN111792631B (en) * | 2020-06-24 | 2023-08-18 | 山东友道化学有限公司 | Device and method for treating nitric acid containing high-boiling-point organic matters |
| CN111620397B (en) * | 2020-06-24 | 2023-08-25 | 山东友道化学有限公司 | Treatment system and treatment method for nitric acid-containing system |
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| CN1745872A (en) * | 2005-08-15 | 2006-03-15 | 天津大学 | Allantoic solution for absorbing Nox and purification of waste gas containing Nox |
| CN204051390U (en) * | 2014-09-10 | 2014-12-31 | 保定宝丰硝化棉有限公司 | For nitrocotton smoke of gunpowder recovery system |
| CN104258705A (en) * | 2014-09-18 | 2015-01-07 | 天津市嘉腾环保设备有限公司 | Nitric oxide waste gas pollution control process method and equipment |
| CN205199280U (en) * | 2015-11-20 | 2016-05-04 | 四川北方硝化棉股份有限公司 | Recovery unit of smoke of gunpowder in nitrocotton production process |
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