CN106669394A - Oil sludge tail gas treatment process - Google Patents
Oil sludge tail gas treatment process Download PDFInfo
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- CN106669394A CN106669394A CN201611235904.8A CN201611235904A CN106669394A CN 106669394 A CN106669394 A CN 106669394A CN 201611235904 A CN201611235904 A CN 201611235904A CN 106669394 A CN106669394 A CN 106669394A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/106—Peroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20753—Nickel
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Abstract
The invention relates to an oil sludge tail gas treatment process, which comprises the following steps of sequentially performing reverse flow alkali washing, reverse flow atomization water washing and multi-media catalytic oxidation treatment on oil sludge tail gas generated through oil sludge pyrolysis to obtain the treated tail gas. The process disclosed by the invention can be used for treating the oil sludge tail gas, so that the tail gas can conform to the national discharge standard.
Description
Technical field
It relates to oil-sludge treatment technical field, in particular it relates to a kind of greasy filth tail gas treatment process.
Background technology
Greasy filth is oily sludge, belongs to HW08 class hazardous wastes, with the Toxic in inflammability and toxicity, and greasy filth
Matter is difficult to degrade, and to ecological and human health serious harm is caused.
Oil-sludge treatment difficulty is big, and currently without being efficiently treated, the industry such as oil refining produces every year millions of tons
Oily sludge, and storage is huge.
Greasy filth reclaims oily substance therein after being pyrolyzed, but in pyrolysis tail gas containing substantial amounts of Organic substance,
Sulfide and nitride, without process, it is impossible to reach the discharge standard of national regulation.
The content of the invention
The purpose of the disclosure is to provide a kind of greasy filth tail gas treatment process, after the technique can be processed greasy filth tail gas
Meet discharging standards.
To achieve these goals, the disclosure provides a kind of greasy filth tail gas treatment process, and the technique includes：Greasy filth is pyrolyzed
Produced greasy filth tail gas carries out successively adverse current alkali cleaning, adverse current atomization washing and multimedium catalytic oxidation treatment, after being processed
Tail gas.
Optionally, the condition of the adverse current alkali cleaning includes：Alkali wash water is molten for the sodium hydroxide that concentration is 1~30 weight %
Liquid, alkali wash water is 5~15 seconds with the time of contact of greasy filth tail gas, and liquid air volume ratio is (3~15)：1.
Optionally, the step of multimedium catalytic oxidation treatment includes：By through the tail gas of adverse current atomization washing and acid
Liquid, oxidant and ferrous ion carry out catalytic oxidation in the presence of nickel-base catalyst；Preferably, it is anti-through catalysis oxidation
Atomized liquid after answering is used in addition acid solution, oxidant and ferrous ion Posterior circle；Wherein, oxidant is preferably hydrogen peroxide.
Optionally, the condition of the catalysis oxidation includes：The time of the catalytic oxidation is 15~45 seconds, liquid gas
Product is than being (3~15)：1, temperature be room temperature to 60 DEG C, the acid solution is at least one in hydrochloric acid, sulphuric acid and oxalic acid, institute
The mol ratio for stating hydrogen peroxide and ferrous ion is 1：(2~10).
Optionally, the nickel-base catalyst includes bamboo charcoal and the nickel sesquioxide being supported on the bamboo charcoal, described Ni-based
The specific surface area of catalyst is 100~300 meters2/ gram, porosity is 85~95%.
Optionally, the step of adverse current alkali cleaning includes：By greasy filth tail gas from the greasy filth of reverse-flow alkali liquid washing tower bottom
The alkali cleaning that gas inlet is sent in the reverse-flow alkali liquid washing tower and sprayed with packing layer and by packing layer top spray thrower
Liquid contacts and carries out the adverse current alkali cleaning, and gained alkali cleaning tail gas is sent from the top of the reverse-flow alkali liquid washing tower, gained alkali
Washing liquid is sent from the alkali wash water outlet of the reverse-flow alkali liquid washing tower bottom；
Preferably, greasy filth tail gas is sent into into the reverse-flow alkali from the greasy filth gas inlet of reverse-flow alkali liquid washing tower bottom
In liquid scrubbing tower；
Preferably, the uniform spray of alkali spray liquid layering.
Optionally, plastic hollow ball is filled with described filler layer.
Optionally, the catalysis will be again carried out after gas distribution grid is distributed through the tail gas of adverse current atomization washing
Oxidation reaction.
Optionally, tail gas is drawn after air-introduced machine will be processed.
Optionally, aiutage of the tail gas by the distance away from ground more than 25 meters is arranged after process air-introduced machine drawn
Put.
The greasy filth tail gas treatment process provided using the disclosure can be processed greasy filth tail gas, to reach national discharge
Standard, so as to be conducive to greasy filth be pyrolyzed carrying out.
Other feature and advantage of the disclosure will be described in detail in subsequent specific embodiment part.
Description of the drawings
Accompanying drawing is, for providing further understanding of the disclosure, and to constitute the part of description, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute restriction of this disclosure.In the accompanying drawings：
Fig. 1 is a kind of structural representation of specific embodiment that disclosure tail gas treatment process adopts device.
Description of reference numerals
The reverse-flow three-phase multimedium catalysis oxidizing tower of atomizing water scrubber 502 of 500 reverse-flow alkali liquid washing towers 501
The spray thrower of 503 air-introduced machine, 504 aiutage 505
The circulating pump of 506 atomizer, 507 catalyst layer 508
The packing layer of 509 pipeline, 510 gas distribution grid 511
Specific embodiment
It is described in detail below in conjunction with accompanying drawing specific embodiment of this disclosure.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the disclosure, is not limited to the disclosure.
Greasy filth can produce pyrogenic steam after pyrolysis, and pyrogenic steam carries out cooling and reclaims after oils, can produce low boiling point
In the tail gas of room temperature, atmosphere pollution is contained in the tail gas, Air Pollutants include inorganic pollution and organic pollution, nothing
Organic pollutants such as dust, SO2、NOx、H2S etc., organic pollution includes lower boiling Organic substance such as short chain aldehyde, alcohol, acid, phenols
(4- hydroxyls 3- methyl-hutanal, acetic acid, butanoic acid, styrene, 4- methyl-hexanals, benzaldehyde, 3- methylphenols) and boiling point compared with
High material such as heterocyclic material, long chain hydrocarbons, acid, ester etc..Accordingly, it would be desirable to pass through exhaust gas processing device to greasy filth tail gas at
Reason, to reach discharge standard.Greasy filth tail gas produced by greasy filth pyrolysis is carried out successively adverse current alkali cleaning, adverse current mist by disclosure technique
Change washing and multimedium catalytic oxidation treatment, tail gas after being processed.
Disclosure technique is carried out based on greasy filth exhaust gas processing device, a kind of specific embodiment, as shown in figure 1, the oil
Mud exhaust gas processing device includes：Reverse-flow alkali liquid washing tower 500, is provided with greasy filth gas inlet and alkali wash water positioned at bottom and goes out
Mouthful and positioned at the alkali cleaning offgas outlet at top；Reverse-flow atomizing water scrubber 501, is provided with alkali cleaning tail gas on the side and enters
Mouth, the water out positioned at bottom and the washing offgas outlet positioned at top；Three-phase multimedium catalysis oxidizing tower 502, is provided with
Offgas outlet and atomized liquid outlet after washing gas inlet, catalysis；The alkali cleaning tail gas of the reverse-flow alkali liquid washing tower 500 goes out
Mouth is in fluid communication with the alkali cleaning gas inlet of the reverse-flow atomizing water scrubber 501, the water of the reverse-flow atomizing water scrubber 501
Washing tail-gas are exported and are in fluid communication with the washing gas inlet of the three-phase multimedium catalysis oxidizing tower 502.Greasy filth can be pyrolyzed
Produced greasy filth tail gas is catalyzed successively in reverse-flow alkali liquid washing tower 500, reverse-flow atomizing water scrubber 501 and three-phase multimedium
Adverse current alkali cleaning, adverse current atomization washing and multimedium catalytic oxidation treatment are carried out in oxidizing tower 502, tail gas is arranged after being processed
Put.Greasy filth tail gas after treatment can reach《Emission standard for odor pollutants》(GB14554-93)、《Atmosphere pollution is comprehensive
Close discharge standard》(GB16297-96) and《Dangerous waste incineration Environmental capacity standard》(GB18484-2001) discharge specified in
Standard.
Because the discharge of tail gas needs certain height, prevent from polluting ground floor air, therefore, the greasy filth tail
Flash Gas Compression Skid System can also include air-introduced machine 503 and aiutage 504, and the gas access of the air-introduced machine 503 is more with the three-phase
Offgas outlet fluid communication, the gas access of the aiutage 504 and the air-introduced machine after the catalysis of medium catalysis oxidizing tower 502
503 gas outlet stream connection, the general distance away from ground of aiutage 504 is more than 25 meters.By arranging air-introduced machine and aerofluxuss
Cylinder, on the one hand tail gas can draw, separately after air-introduced machine 503 will be processed from the three-phase multimedium catalysis oxidizing tower 502
On the one hand aiutage 504 of the tail gas by the distance away from ground more than 25 meters is carried out after the process that can be drawn air-introduced machine 503
Discharge, so as to reach discharge standard.
According to the disclosure, the effect of reverse-flow alkali liquid washing tower is to carry out greasy filth tail gas with alkali liquor under reverse flow state
Contact, to remove alkali liquor in SO2、NOx、H2The acidic materials such as S, are sprayed by reverse-flow alkali, and greasy dirt will be contained using sodium hydroxide
Waste gas carries out being absorbed after breakdown of emulsion.For example, it is located at as shown in figure 1, can be provided with the reverse-flow alkali liquid washing tower 500
The spray thrower 505 at top and the packing layer 511 positioned at the lower section of the spray thrower 505, the spray thrower is used to spray alkali liquor, for example
Can be porous disc formula spray thrower, the alkali liquor of ejection and the greasy filth after the filler in the packing layer such as dispersion of plastic hollow ball
Tail gas contact carries out alkali cleaning.The reverse-flow alkali liquid washing tower inside gas-liquid counter current way of contact promotes the mass transport process between gas-liquid, carries
High-selenium corn efficiency.Packing layer inside filled plastics hollow ball filler, increases gas liquid interfacial area, improves the time of staying of gas,
Promote the assimilation effect to material.The appropriate uniform spray of spray liquid layering is prevented effectively from sending out for the short flow phenomenon of tower internal gas
It is raw.Concrete operations mode can be：Greasy filth tail gas is sent from the greasy filth gas inlet of the reverse-flow bottom of alkali liquid washing tower 500
The alkali for entering in the reverse-flow alkali liquid washing tower 500 and being sprayed with packing layer 511 and by the top spray thrower 505 of packing layer 511
Washing liquid contacts and carries out the adverse current alkali cleaning, and gained alkali cleaning tail gas is sent from the top of the reverse-flow alkali liquid washing tower 500, institute
Obtain alkali wash water to send from the alkali wash water outlet of the reverse-flow bottom of alkali liquid washing tower 500.The condition of the adverse current alkali cleaning can be with
Including：Alkali wash water is the sodium hydroxide solution that concentration is 1~30 weight %, the preferably sodium hydroxide solution of 2~8 weight %,
Alkali wash water is 5~15 seconds with the time of contact of cooling waste gas, and liquid air volume ratio is (3~15)：1, the uniform spray of alkali spray liquid layering
Drench.
Tail gas middle acid substance after alkali cleaning is removed, but can entrainment portions alkali liquor and moisture, in order to by reverse-flow alkali
Alkaline drop-wise water in liquid scrubbing tower and condense the drop for producing dress water because of temperature difference, spray water is removed, and is three-phase multimedium
Catalysis oxidizing tower Effec-tive Function provides good environment, and prevents alkaline spray water from causing into three-phase multimedium catalysis oxidizing tower
The reactive power consumption of pH, the tail gas after alkali cleaning can be sent in reverse-flow atomizing water scrubber 501 washed.
According to the disclosure, three-phase multimedium catalysis oxidizing tower is used to increase the response time of molecular fragment and oxide group,
Promote the degraded of polluter, it is ensured that internally in the presence of catalyst layer, oxidant enters to a small amount of unreacted polluter
Row exhaustive oxidation, so as to ensure the qualified discharge of exit gas abnormal flavour.For example, as shown in figure 1, three-phase multimedium catalysis oxygen
Change and the atomizer 506 positioned at top, the catalyst layer 507 below the atomizer 506, institute are provided with tower 502
State the catalyst layer 507 of washing gas inlet and atomized liquid outlet positioned at three-phase multimedium catalysis oxidizing tower 502
The side of lower section, the outside of the three-phase multimedium catalysis oxidizing tower 502 is provided with circulating pump 508 and pipeline 509, the circulation
Pump 508 and pipeline 509 are in fluid communication the atomizer 506 and atomized liquid outlet, and feeding acid is provided with the pipeline 509
The entrance of liquid, oxidant and ferrous salt, the catalyst layer 507 includes bamboo charcoal hypothalluses and is supported on the bamboo charcoal hypothalluses
Nickel sesquioxide layer, i.e. nickel-base catalyst.The concrete steps of multimedium catalytic oxidation treatment can include：Will be through adverse current mist
The tail gas and acid solution, oxidant and ferrous ion for changing washing carries out catalytic oxidation in the presence of nickel-base catalyst, passes through
Atomized liquid after catalytic oxidation is preferably adding acid solution, oxidant and ferrous ion Posterior circle to use.The catalysis oxygen
The condition of change can include：The time of the catalytic oxidation is 15~45 seconds, and liquid air volume ratio is (3~15)：1, temperature
It is room temperature to 60 DEG C, the acid solution is at least one in hydrochloric acid, sulphuric acid and oxalic acid, and the oxidant is preferably dioxygen
The mol ratio of water, the hydrogen peroxide and ferrous ion is 1：(2~10).The nickel-base catalyst includes bamboo charcoal and is supported on described
Nickel sesquioxide on bamboo charcoal, the specific surface area of the nickel-base catalyst is 100~300 meters2/ gram, porosity is 85~95%.
In order that into three-phase multimedium catalysis oxidizing tower tail gas it is fully dispersed with catalyst layer in nickel catalyst
Agent is contacted, and the lower section of the catalyst layer 507 can be provided with gas distribution grid 510, by through the tail gas of adverse current atomization washing
Carry out the catalytic oxidation again after gas distribution grid 510 is distributed.
The disclosure is further illustrated below by embodiment, but the disclosure is not therefore any way limited.
From certain oil plant crude oil storage tank tank bottom oil sludge, phosphorus content is 58.7 weight % to greasy filth used by the embodiment of the present disclosure,
Hydrogen content is 7.21 weight %, and nitrogen content is 0.55 weight %, and sulfur content is 0.31 weight %, balance of heavy metal and mineral
Matter.
Carbon weight in carbon weight/greasy filth in oils product carbon yield=gained oils product in the embodiment of the present disclosure
Amount.Light oil, diesel oil and heavy oil selectivity are measured using liquid chromatograph in oils product, and the boiling range of light oil is less than 210 DEG C, bavin
The boiling range of oil is 210~370 DEG C, and heavy oil boiling point is more than 370 DEG C.Pyrolysis waste residue, greasy filth and oils product phosphorus content adopt carbon
Content analyzer is measured.
Embodiment 1
In temperature be 280 DEG C by tank bottom oil sludge, absolute pressure less than being pyrolyzed under conditions of 900 millibars, pyrolysis gained
After steam cooling, oils and pyrolysis tail gas are obtained, be pyrolyzed in the exhaust gas processing device that tail gas is sent into shown in Fig. 1 and processed.
As shown in figure 1, exhaust gas processing device includes reverse-flow alkali liquid washing tower 500, reverse-flow atomizing water scrubber 501 and three
Phase multimedium catalysis oxidizing tower 502.Alkali wash water is the sodium hydroxide solution of 5 weight % in reverse-flow alkali liquid washing tower 500, control
Alkali wash water is 7 seconds with the time of contact of tail gas, and liquid air volume ratio is 5:1；In reverse-flow atomizing water scrubber 501 water with through alkali cleaning
Afterwards the time of contact of tail gas is 6 seconds, and liquid air volume ratio is 1:1；Tail gas stops in three-phase multimedium catalysis oxidizing tower 502 after washing
The time is stayed for 30 seconds, liquid air volume ratio is 6:1, liquid phase includes 5 weight % dilute sulfuric acids, 3 weight % hydrogen peroxide and 10 weight % chlorine
The mol ratio for changing ferrous iron solution, hydrogen peroxide and ferrous ion is 1：4, dilute sulfuric acid is 1 with dioxygen water weight ratio:4, nickel-base catalyst
Specific surface area be 287 meters2/ gram, with bamboo charcoal as carrier, aiutage is highly 25 meters.Hydrogen sulfide content is in gained tail gas
0.03mg/m3, hydrogen sulfide emission amount be 0.20Kg/h, odor concentration 50, emission meet standard GB/T 14554-93,
GB16297-96 and GB18484-2001.
Embodiment 2
The step of embodiment 2, is substantially the same manner as Example 1, and difference is：Greasy filth pyrolysis is divided into the first pyrolysis and the
Two pyrolysis, the temperature of the first pyrolysis is 105 DEG C, and the time is 2 hours, and pressure is 800 millibars, and the temperature of the second pyrolysis is 260 DEG C,
Time is 3 hours, and pressure is less than 50 millibars.Hydrogen sulfide content is 0.01mg/m in gained tail gas3, hydrogen sulfide emission amount is
0.06Kg/h, odor concentration 35.Emission meets standard GB/T 14554-93, GB16297-96 and GB18484-2001.
Embodiment 3
The step of embodiment 3, is substantially the same manner as Example 1, and difference is：Alkali cleaning in reverse-flow alkali liquid washing tower 500
Liquid is the sodium hydroxide solution of 1 weight %, and it is 15 seconds to control alkali wash water with the time of contact of tail gas, and liquid air volume ratio is 3:1；It is inverse
Water and the time of contact of the tail gas after alkali cleaning are 6 seconds in streaming atomizing water scrubber 501, and liquid air volume ratio is 1:1；Tail after washing
Gas time of staying in three-phase multimedium catalysis oxidizing tower 502 is 30 seconds, and liquid air volume ratio is 6:1, liquid phase includes that 5 weight % are dilute
The mol ratio of sulphuric acid, 3 weight % hydrogen peroxide and 10 weight % solution of ferrous chloride, hydrogen peroxide and ferrous ion is 1：4, dilute sulfuric acid
It is 1 with dioxygen water weight ratio:4, the specific surface area of nickel-base catalyst is 287 meters2/ gram, with bamboo charcoal as carrier.Sulfur in gained tail gas
Change hydrogen content is 0.03mg/m3, hydrogen sulfide emission amount be 0.30Kg/h, odor concentration 103.Emission meets national standard
GB14554-93, GB16297-96 and GB18484-2001.
Embodiment 4
The step of embodiment 4, is substantially the same manner as Example 1, and difference is：Alkali cleaning in reverse-flow alkali liquid washing tower 500
Liquid is the sodium hydroxide solution of 10 weight %, and it is 5 seconds to control alkali wash water with the time of contact of tail gas, and liquid air volume ratio is 15:1；
Water and the time of contact of the tail gas after alkali cleaning are 6 seconds in reverse-flow atomizing water scrubber 501, and liquid air volume ratio is 1:1；After washing
Tail gas time of staying in three-phase multimedium catalysis oxidizing tower 502 is 30 seconds, and liquid air volume ratio is 6:1, liquid phase includes 5 weight %
The mol ratio of dilute sulfuric acid, 3 weight % hydrogen peroxide and 10 weight % solution of ferrous chloride, hydrogen peroxide and ferrous ion is 1：4, dilute sulfur
Acid is 1 with dioxygen water weight ratio:4, the specific surface area of nickel-base catalyst is 287 meters2/ gram, with bamboo charcoal as carrier.In gained tail gas
Hydrogen sulfide content is less than 0.01mg/m3, less than 0.01Kg/h, odor concentration is 200 to hydrogen sulfide emission amount.Emission meets state
Family's standard GB14554-93, GB16297-96 and GB18484-2001.
Embodiment 5
The step of embodiment 5, is substantially the same manner as Example 1, and difference is：Alkali cleaning in reverse-flow alkali liquid washing tower 500
Liquid is the sodium hydroxide solution of 20 weight %, and it is 5 seconds to control alkali wash water with the time of contact of tail gas, and liquid air volume ratio is 15:1；
Water and the time of contact of the tail gas after alkali cleaning are 6 seconds in reverse-flow atomizing water scrubber 501, and liquid air volume ratio is 1:1；After washing
Tail gas time of staying in three-phase multimedium catalysis oxidizing tower 502 is 30 seconds, and liquid air volume ratio is 6:1, liquid phase includes 5 weight %
The mol ratio of dilute sulfuric acid, 3 weight % hydrogen peroxide and 10 weight % solution of ferrous chloride, hydrogen peroxide and ferrous ion is 1：4, dilute sulfur
Acid is 1 with dioxygen water weight ratio:4, the specific surface area of nickel-base catalyst is 287 meters2/ gram, with bamboo charcoal as carrier, in gained tail gas
Hydrogen sulfide content is less than 0.01mg/m3, less than 0.01Kg/h, odor concentration is 1500 to hydrogen sulfide emission amount.Emission meets
Standard GB/T 14554-93, GB16297-96 and GB18484-2001.
Comparative example 1
Comparative example 1 is to be not provided with reverse-flow alkali liquid washing tower 500 and reverse-flow atomizing water scrubber with the difference of embodiment 1
501, tail gas is sent directly into into three-phase multimedium catalysis oxidizing tower 502 carries out catalytic oxidation treatment, and hydrogen sulfide contains in gained tail gas
Measure as 0.73mg/m3, hydrogen sulfide emission amount is 1.75Kg/h, and odor concentration 2300 does not meet standard GB/T 14554-93.
Can be seen that to be discharged using the tail gas treatment process of the disclosure from embodiment and comparative example and meet national standard
Tail gas, but if naoh concentration is too high in adverse current alkali cleaning, subsequent catalyst oxidation reaction can be impacted, if not carrying out
Adverse current alkali cleaning, then catalysis oxidation cannot remove most of hydrogen sulfide.
The preferred implementation of the disclosure is described in detail above in association with accompanying drawing, but, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, various letters can be carried out with technical scheme of this disclosure
Monotropic type, these simple variants belong to the protection domain of the disclosure.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the disclosure to it is various can
The compound mode of energy is no longer separately illustrated.
Additionally, combination in any can also be carried out between a variety of embodiments of the disclosure, as long as it is without prejudice to this
Disclosed thought, it should equally be considered as disclosure disclosure of that.
Claims (10)
1. a kind of greasy filth tail gas treatment process, it is characterised in that：The technique includes：By greasy filth pyrolysis produced by greasy filth tail gas according to
It is secondary to carry out adverse current alkali cleaning, adverse current atomization washing and multimedium catalytic oxidation treatment, tail gas after being processed.
2. technique according to claim 1, wherein, the condition of the adverse current alkali cleaning includes：It is 1~30 that alkali wash water is concentration
The sodium hydroxide solution of weight %, alkali wash water is 5~15 seconds with the time of contact of greasy filth tail gas, and liquid air volume ratio is (3~15)：
1。
3. technique according to claim 1 and 2, wherein, include the step of the multimedium catalytic oxidation treatment：To pass through
It is anti-that the tail gas of adverse current atomization washing carries out catalysis oxidation with acid solution, oxidant and ferrous ion in the presence of nickel-base catalyst
Should；
Preferably, the atomized liquid after catalytic oxidation is adding acid solution, oxidant and ferrous ion Posterior circle to use；
Wherein, oxidant is preferably hydrogen peroxide.
4. the technique according to any one of claim 1-3, wherein, the condition of the catalysis oxidation includes：The catalysis
The time of oxidation reaction is 15~45 seconds, and liquid air volume ratio is (3~15)：1, temperature is room temperature to 60 DEG C, and the acid solution is choosing
The mol ratio of at least one from hydrochloric acid, sulphuric acid and oxalic acid, the hydrogen peroxide and ferrous ion is 1：(2~10).
5. the technique according to claim 3 or 4, wherein, the nickel-base catalyst includes bamboo charcoal and is supported on the bamboo charcoal
On nickel sesquioxide, the specific surface area of the nickel-base catalyst is 100~300 meters2/ gram, porosity is 85~95%.
6. the technique according to any one of claim 1-5, wherein, include the step of the adverse current alkali cleaning：By greasy filth tail
Gas is sent in the reverse-flow alkali liquid washing tower (500) simultaneously from the greasy filth gas inlet of reverse-flow alkali liquid washing tower (500) bottom
The alkali wash water sprayed with packing layer (511) and by packing layer (511) top spray thrower (505) contacts and carries out the adverse current alkali
Wash, gained alkali cleaning tail gas is sent from the top of the reverse-flow alkali liquid washing tower (500), and gained alkali wash water is from the reverse-flow alkali
The alkali wash water outlet of liquid scrubbing tower (500) bottom is sent；
Preferably, greasy filth tail gas is sent into from the greasy filth gas inlet of reverse-flow alkali liquid washing tower (500) bottom described reverse-flow
In alkali liquid washing tower (500)；
Preferably, the uniform spray of alkali spray liquid layering.
7. technique according to claim 6, wherein, plastic hollow ball is filled with described filler layer (511).
8. technique according to claim 3, wherein, by through the tail gas of adverse current atomization washing through gas distribution grid
(510) catalytic oxidation is carried out after being distributed again.
9. the technique according to any one of claim 1-8, wherein, tail gas is drawn after air-introduced machine (503) will be processed.
10. technique according to claim 9, wherein, tail gas is by away from ground after the process that air-introduced machine (503) is drawn
Aiutage (504) of the distance more than 25 meters is discharged.
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| CN201611235904.8A CN106669394A (en) | 2016-12-28 | 2016-12-28 | Oil sludge tail gas treatment process |
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| CN201611235904.8A CN106669394A (en) | 2016-12-28 | 2016-12-28 | Oil sludge tail gas treatment process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107718359A (en) * | 2017-06-02 | 2018-02-23 | 江山市华顺有机硅有限公司 | Silicon rubber cracking waste residue handling process and system based on the heterogeneous continuity method of gas-solid |
| CN109316936A (en) * | 2018-11-06 | 2019-02-12 | 张锐 | A kind of agricultural soil reparation incineration method flue gas purification device |
| CN109985503A (en) * | 2019-04-12 | 2019-07-09 | 沁阳市华达实业有限公司 | A kind of glance coal waste gas purification treatment process |
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| CN109316936A (en) * | 2018-11-06 | 2019-02-12 | 张锐 | A kind of agricultural soil reparation incineration method flue gas purification device |
| CN109985503A (en) * | 2019-04-12 | 2019-07-09 | 沁阳市华达实业有限公司 | A kind of glance coal waste gas purification treatment process |
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