CN206730825U - A kind of system for handling foul gas - Google Patents
A kind of system for handling foul gas Download PDFInfo
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- CN206730825U CN206730825U CN201720376671.7U CN201720376671U CN206730825U CN 206730825 U CN206730825 U CN 206730825U CN 201720376671 U CN201720376671 U CN 201720376671U CN 206730825 U CN206730825 U CN 206730825U
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Abstract
The system of foul gas is handled the utility model discloses a kind of, including washing unit, low temperature plasma pre-oxidation unit and the catalysis oxidation washing unit being sequentially connected in series；Wherein, washing unit includes spray scrubber；Low temperature plasma pre-oxidation unit includes at least one plasma purification storehouse；Catalysis oxidation washing unit includes catalysis oxidizing tower, and catalysis oxidizing tower top is provided with packing layer, and bottom is provided with beds, is provided with gas feed in the middle part of tower, tower top is provided with sprinkling equipment.The utility model is used in combination low temperature plasma equipment and catalysis oxidation washing facility, the former serves pre-oxidation effect, improve organic matter it is water miscible and meanwhile reduce subsequent catalyst oxidation wash tower load, the operating cost of oxidant can be substantially reduced, and washing process does not produce secondary wastewater pollution, whole waste gas treatment process is simple, can efficient stable and investment operating cost it is low, there is good practicality.
Description
Technical field
It the utility model is related to environmental technology field, and in particular to a kind of technical field of foul gas processing, more specifically
Refer to a kind of system of the low temperature plasma coupling and catalyzing oxidation rinsing technical finesse containing foul waste gas.
Technical background
At present, domestic rubbish disposal station, raising fish and shrimp place, all kinds of chemical plant, Treatment of Sludge station, sewage treatment plant all build
The processing system of foul smelling material, because rotten material of planting is being handled caused by rubbish, sludge, industrial chemicals, raising fish and shrimp place
During easily produce substantial amounts of acid, neutral, alkalescence inorganic or organic odor gas, portion gas even contains germ,
Such as it is directly discharged, resident's health and normal life will be directly affected, even low concentration still allows people to produce not
Suitable sense.Such currently used processing mode of waste gas is that either alkali spray or vegetation water absorb masking, treatment effect to Water spray
Very limited and generation secondary pollution；Burning method can be handled thoroughly, but existed and invested higher, unsafe shortcoming.
In the prior art, the method and apparatus that foul gas is handled using low-temperature plasma is more typical, such as：Application No.
Disclosed in CN201410395869.0, CN201410228186.6 patent of invention and foul gas is handled using low-temperature plasma
Method, foul gas is after low-temperature plasma is handled, it is necessary to by ozono lysis apparatus remove residual ozone after again
Adsorbed or biochemical treatment.A kind of atomizing plasma body oxidation of Application No. CN201310208438.4 disclosure of the invention-
The method that biomass absorbent handles stench, ozone decomposition is not had to after corona treatment, but required sorbing material is prepared and answered
It is miscellaneous, be not easy to obtain.Application No. CN201410775946.5 patent of invention discloses a kind of garbage transfer station foul gas and administered
Technique and device, foul gas carries out catalysis oxidation after low-temperature plasma is handled, but catalysis oxidation temperature is high, and handles
Also need to carry out carrying out washing treatment afterwards.
Based on above method the shortcomings that, the utility model provide a kind of more efficient, convenient processing foul gas and are
System and method.
The content of the invention
The purpose of this utility model is to provide a kind of system for handling foul gas.
A kind of system for handling foul gas, it is characterised in that：Including be sequentially connected in series washing unit, low temperature plasma
Pre-oxidize unit and catalysis oxidation washing unit；Wherein, washing unit includes spray scrubber；Low temperature plasma pre-oxidation is single
Member includes at least one plasma purification storehouse；Catalysis oxidation washing unit includes catalysis oxidizing tower, in catalysis oxidizing tower
Portion is provided with packing layer, and bottom is provided with beds, is provided with gas feed in the middle part of tower, tower top is provided with sprinkling equipment.
Tthe utility model system will first pass through washing unit and be absorbed, be cooled after the unified collection of foul waste gas, removing is deposited
Acidity or alkaline gas, the outlet of washing unit unit is pre-oxidized by low temperature plasma, excited, bombarded by ionization
Most of organic molecule is interrupted, oxidation is changed into water-soluble preferable organic molecule, and then waste gas is catalyzed oxygen by two-stage
After changing washing unit, oxygenolysis can occur on beds for organic matter and oxidant in waste gas, and it is dirty to remove waste gas
Contaminate thing, obtained processing gas qualified discharge.During this, low temperature plasma pre-oxidation makes with combining for catalysis oxidation washing
With, the former serve pre-oxidation effect, improve organic matter it is water miscible and meanwhile reduce subsequent catalyst oxidation wash tower load, can be significantly
The operating cost of oxidant is reduced, and washing process does not produce secondary wastewater pollution, whole waste gas treatment process is simple, can be efficiently
Stable and investment operating cost is low, has good practicality.
Preferably, washing unit uses spray scrubber, spray scrubber bottom is provided with delivery port, delivery port and catalysis
Oxidation rinsing unit passes through pipeline connection.
Preferably, in processing system described in the utility model, washing unit and low temperature plasma pre-oxidation unit
Connected by Dehumidifying element, Dehumidifying element uses gas-liquid separator.Further preferably, Dehumidifying element uses dynamic gas-liquid separator, can
The continuous water being separated off in gas.
Preferably, low temperature plasma pre-oxidation unit includes multiple plasma purification storehouses, described grade from
Daughter cleaning position is connected by way of series connection and/or parallel connection.
Preferably, in catalysis oxidation washing unit, in addition to the auxiliary equipment supporting with catalysis oxidizing tower, auxiliary equipment
Configuration system, transfer tank, auxiliary catalysis oxidation reaction tank (groove) including oxidant, cooxidant addition equipment, acidity and
Concentration detector and automatically adjust equipment.
Preferably, being further connected with absorbing unit behind catalysis oxidation washing unit, absorbing unit is inhaled using activated carbon double tower
Applying equipment.Further preferably, absorbing unit also includes active carbon regenerating unit, using regenerated carbon.Activated carbon can periodically be realized
Regeneration cycle uses.
Using the method for said system of the present utility model processing foul gas, comprise the following steps：
(1) wash：Foul gas enters washing unit by gas collecting equipment, by certainly during the bottom-up diffusion of gas
On the inorganic alkali liquid washing that sprays downwards, obtain cleaning solution 1 and processing gas 2；
(2) pre-oxidize：Handle gas 2 and enter low temperature plasma oxidation unit, purified by least one low-temperature plasma
After the processing of storehouse, obtain handling gas 3；
(3) catalysis oxidation is washed：Processing gas 3 enters catalytic oxidation unit, and the cleaning solution 1 with adding oxidant inversely connects
Touch, obtain mixed liquor 4 and processing gas 5, processing gas discharge, catalytic bed is passed through when mixed liquor 4 flows downward, obtains treatment fluid 6,
Treatment fluid 6 is used for the inorganic alkali lye described in configuration step (1).
In step (3), the oxidant added in cleaning solution 1 is hydrogen peroxide, chlorine dioxide, one kind in sodium hypochlorite or several
Kind, oxygenate content is 0.2~4%, while acid-base modifier has been additionally added in cleaning solution 1, and regulation cleaning solution 1 is alkaline, control
The pH of mixed liquor 4 processed is 8-9.The main function of alkali liquor absorption is in the acidic oxide and partial organic substances in tail gas is removed.
Alkali is sodium hydroxide or potassium hydroxide in the inorganic alkali lye, and the mass concentration of alkali is 5-15%, and inorganic alkali lye follows
Ring keeps pH ＞ 9 during utilizing.
Preferably, processing gas 2 first passes through dynamic gas-liquid separator before low temperature plasma oxidation unit is entered, obtain
Qi-regulating 2-1 everywhere；Processing gas 5 first passes through the absorption of activated carbon double tower, qualified discharge before discharge.The main work of gas-liquid separator
With being exactly to retain the aerial fog type and/or particulate matter in waste gas, to ensure the normal operation of follow-up equipment.Charcoal absorption list
Member is two sets of activated carbon casees or activated carbon tower, and a set of function using another set of desorption and regeneration can be achieved in automatic or manual switching.
Activated carbon is granular activated carbon, and the granular activated carbon can use normal activated carbon or is made by modified activated carbon,
Described grain shape is spherical, cylindrical or almost spherical.Adsorbent desorption and regeneration can use hot-air, hot nitrogen or heat to steam
The modes such as vapour.
Processing gas 2-1 of the processing gas 2 or processing gas 2 that step (1) obtains after dehumidifying enters low temperature plasma oxygen
After changing unit, plasma purification storehouse caused a large amount of high energy electron, negative ions, excitation state in energization running
Particle and the free radical with strong oxidizing property, foul waste gas molecule can be mostly oxidised into inorganic states gas, or be formed easy
Degraded, water miscible intermediate product.
Processing gas 3 that step (2) obtains enters catalysis oxidation washing unit, catalysis oxidation scrubbing tower by top filler system
System and beds two parts of bottom form；By oxidant (hydrogen peroxide, chlorine dioxide, sodium hypochlorite etc.), acidity adjustment
Agent is made into absorbing liquid from catalysis oxidation tower top to bottom of towe circulated sprinkling with the absorbing liquid in previous stage caustic wash tower, with the middle part from tower
The waste gas counter-current absorption come in, absorbing liquid pass through catalyst bed by beds, control tower middle part water outlet pH after 8~9
Layer；During being somebody's turn to do, absorbing liquid produces after absorbing the malodor components in waste gas by the oxidant in beds, with absorbing liquid
Active specy oxidative decomposition occurs, so as to waste gas deep purifying, while do not produce the secondary pollutions such as waste water.
Spray column, low temperature plasma oxidation and catalysis oxidation washing process are combined in above procedure, mainly there is 3 skills
Art advantage：First, spray column can play the role of to wash and cool to waste gas, ensure the height of follow-up low temperature plasma oxidation equipment
Imitate stable operation；Second, low temperature plasma has preferable decomposition to foul waste gas, the active specy energy in plasma
Most of by foul waste gas molecular oxidation is electrodeless state, or degradable, water-soluble preferable accessory substance, the process can reduce useless
There is pre-oxidation effect while gas concentration to waste gas, can effectively reduce subsequent catalyst Effects Analysis load and oxidant consumption；The
Three, spray liquid can be with catalysis oxidizing tower water outlet loop configuration into the spray liquid containing oxidant, in internal system circulation, more in system
Secondary to apply mechanically, waste gas component etc. can be decomposed thoroughly in waste gas and waste water, not produce secondary pollution.
The spray scrubber of step (1) is graphite or fiberglass corrosion-resistant filling tower, and filler is ceramics or polytetrafluoroethylene (PTFE)；
Gas liquid ratio is 1~50L/m3, gas residence time in tower is washed is 5~60s.
Step (2) low temperature plasma oxidation equipment discharge mode can use double-dielectric barrier discharge, it is ensured that equipment
Safety and stability, while reach more preferable removal efficiency.
Step (3) catalysis oxidizing tower is graphite or modified graphite resistant material film-falling absorption tower；The material of adsorption tower is
Fiberglass or Fluorine-lined carbon steel material.The liquid-gas ratio on solution absorption tower is 3~8, and waste gas flow velocity in packed tower is 0.3~3m/s；
Spray can be the mode that tower top spray or tower top spray respectively with middle part.
Filler is loaded on catalytic oxidation unit top, and bottom of towe has beds.Top filler is ceramics or polytetrafluoroethylene (PTFE)；
The catalyst of bottom is loaded catalyst, using activated carbon, NACF, aluminum oxide, molecular sieve or ceramics as carrier, with
Copper, the oxide of copper, iron, the oxide of iron, cobalt, the oxide of cobalt, nickel, the oxide of nickel, titanium, titanyl compound, molybdenum, molybdenum
At least one of oxide is used as active component；Waste gas enters in the middle part of tower, is absorbed with the solution that tower top sprays, finally
Oxidative decomposition occurs by beds.
Included in step (3) catalytic oxidation unit auxiliary facility but be not limited only to circulating pump, oxidant configures system, transfer
Groove, auxiliary catalysis oxidation reaction tank (groove), cooxidant add-on system, pH and density monitoring system and automatic regulating system etc.
Equipment；
Method described in the utility model is applied to domestic rubbish disposal station, raising fish and shrimp place, all kinds of chemical plant, sludge
The processing method of foul waste gas is produced during treating stations, sewage treatment plant etc..
Brief description of the drawings
Fig. 1 is the system schematic for handling foul gas.
Embodiment
Embodiment 1：
The system of processing foul gas as shown in Figure 1, including spray scrubber 1, the low temperature plasma being sequentially connected
Cleaning position 2 and catalysis oxidizing tower 3；The bottom of spray scrubber 1 is provided with delivery port, and delivery port is connected with catalysis oxidizing tower 3 by pipeline
It is logical.Spray scrubber 1 and plasma purification storehouse 2 are connected by dehydrater 4, and dehumidifier 4 uses dynamic gas-liquid separator,
The water that can be continuously separated off in gas.The top of catalysis oxidizing tower 3 is provided with packing layer, and bottom is provided with beds, tower middle part
Provided with gas feed, tower top is provided with sprinkling equipment.
In catalysis oxidation washing unit, in addition to the auxiliary equipment supporting with catalysis oxidizing tower, auxiliary equipment include oxidation
Configuration system, transfer tank, auxiliary catalysis oxidation reaction tank (groove), cooxidant addition equipment, acidity and the Concentration Testing of agent
Device and automatically adjust equipment.Absorbing unit is further connected with behind catalysis oxidation washing unit, absorbing unit is inhaled using activated carbon double tower
Applying equipment.Absorbing unit also includes active carbon regenerating unit, using regenerated carbon, can periodically realize the regeneration cycle of activated carbon
Use.
Embodiment 2：
A large amount of sulfide hydrogens, trimethylamine, methyl sulfide, methyl mercaptan and low concentration ammonia are generated in certain fish product production process
Foul waste gas.Wherein hydrogen sulfide about 800mg/m3, methyl sulfide about 200mg/m3, TVOC about 560mg/m3, waste gas is with 3000m3/h
Flow enter filler spray column, with concentration be 10% sodium hydrate aqueous solution counter-current absorption, liquid-gas ratio 6, sulphur after absorption
Change hydrogen content about 42mg/m3, methyl sulfide content about 168mg/m3, TVOC about 420mg/m3；Waste gas after alkali sprays enters low temperature
Plasma oxidation equipment, equipment use dielectric barrier discharge, installed power about 12KW, exhaust gas residence time about 5.3 seconds, given up
Gas is after low temperature plasma oxidation equipment, hydrogen sulfide content about 18mg/m3, methyl sulfide content about 110mg/m3, TVOC is about
200mg/m3；The waste gas come out from low temperature plasma oxidation washes tower in the middle part of the tower into two-stage catalysis oxidation, and from being catalyzed oxygen
Change and wash inversely being contacted containing oxidizing agent solution for tower portion top spray leaching, sprinkle density 30m3/m2H, exhaust gas residence time 10s, institute
It is 2.3% to state the liquor natrii hypochloritis's available chlorine content being pumped into the middle part of catalysis oxidizing tower, and it is 35 DEG C that wherein packed tower, which absorbs temperature,
Reaction bed temperature is 40 DEG C, and bed height about 400mm, air speed is about 1.5s-1.Enter adsorption tower, waste gas after vent gas treatment
It is about 0.2m/s by adsorption tower flow velocity, after operation starts, hydrogen sulfide, methyl sulfide and TVOC in a tail gas is surveyed every 180min
Numerical value, sulfurated hydrogen detection does not go out from the waste gas of adsorption tower out, methyl sulfide about 0.2mg/m3, TVOCs is about 78mg/m3, processing
Gas high-altitude qualified discharge afterwards, while catalysis oxidizing tower water outlet COD is 10mg/m3。
Embodiment 3：
The foul waste gas of Sulfide-containing Hindered, mercaptan and a small amount of organic amine in certain enterprise's sewage disposal biochemical waste gas production.Wherein sulphur
Ether about 18mg/m3, mercaptan about 46mg/m3, TVOC about 178mg/m3, waste gas is with 1000m3/ h flow enters filler spray column, with
Concentration be 10% sodium hydrate aqueous solution counter-current absorption, liquid-gas ratio 4, thioether content about 15mg/m after absorption3, methyl sulfide contains
Measure about 33mg/m3, TVOC about 14mg/m3；Waste gas after alkali sprays enters low temperature plasma oxidation equipment, and equipment is using Jie
Matter barrier discharge, installed power about 8KW, exhaust gas residence time about 6 seconds, waste gas is after low temperature plasma oxidation equipment, sulphur
Change hydrogen content about 10mg/m3, methyl sulfide content about 21mg/m3, TVOC about 93mg/m3；Come out from low temperature plasma oxidation useless
Gas enters one stage catalyzing oxidation in the middle part of tower and washes tower, with washing inversely being connect containing oxidizing agent solution for tower portion top spray leaching from catalysis oxidation
Touch, sprinkle density 25m3/m2H, exhaust gas residence time 4.5s, the sodium hypochlorite that the catalysis oxidizing tower middle part is pumped into are molten
Liquid available chlorine content is 1.2%, and it is 30 DEG C that wherein packed tower, which absorbs temperature, and reaction bed temperature is 35 DEG C, and bed height is about
200mm, air speed are about 1.0s-1.Enter adsorption tower after vent gas treatment, waste gas is about 0.21m/s by adsorption tower flow velocity, and operation is opened
After beginning, hydrogen sulfide, methyl sulfide and TVOC numerical value in a tail gas are surveyed every 120min, hydrogen sulfide in the waste gas come out from adsorption tower
Inspection does not measure, methyl sulfide about 0.04mg/m3, TVOCs is about 44mg/m3, gas high-altitude qualified discharge after processing, while it is catalyzed oxygen
It is 0.8mg/m to change tower water outlet COD3。
Claims (5)
- A kind of 1. system for handling foul gas, it is characterised in that：It is pre- including the washing unit that is sequentially connected in series, low temperature plasma Oxidation unit and catalysis oxidation washing unit；Wherein, washing unit includes spray scrubber；Low temperature plasma pre-oxidizes unit Including at least one plasma purification storehouse；Catalysis oxidation washing unit includes catalysis oxidizing tower, catalysis oxidizing tower top Provided with packing layer, bottom is provided with beds, is provided with gas feed in the middle part of tower, tower top is provided with sprinkling equipment.
- 2. the system as claimed in claim 1, it is characterised in that：Washing unit and low temperature plasma pre-oxidation unit by except Wet unit connection, described Dehumidifying element use gas-liquid separator.
- 3. the system as claimed in claim 1, it is characterised in that：Absorbing unit is also associated with behind catalysis oxidation washing unit, Described absorbing unit is activated carbon double tower adsorption plant.
- 4. the system as claimed in claim 1, it is characterised in that：Spray scrubber, spray scrubber bottom are provided with delivery port, gone out The mouth of a river passes through pipeline connection with catalysis oxidation washing unit.
- 5. system as claimed in claim 3, it is characterised in that：Catalysis oxidation washing unit also includes auxiliary equipment, and auxiliary is set It is standby include circulating pump, oxidant configuration system, transfer tank, auxiliary catalysis oxidation reaction tank, cooxidant add-on system, pH and Density monitoring system and automatic regulating system, absorbing unit also include active carbon regenerating unit.
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| CN201720376671.7U CN206730825U (en) | 2017-04-12 | 2017-04-12 | A kind of system for handling foul gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107008124A (en) * | 2017-04-12 | 2017-08-04 | 浙江奇彩环境科技股份有限公司 | A kind of system and method for handling foul gas |
| CN109316935A (en) * | 2018-11-06 | 2019-02-12 | 广州市真诚环保科技股份有限公司 | A kind of low-temperature plasma ionization method of foul gas |
| CN109455845A (en) * | 2018-04-25 | 2019-03-12 | 轻工业环境保护研究所 | A kind of vehicle repairing factory exhaust gas waste water cooperative processing method and device |
| CN112023690A (en) * | 2020-08-26 | 2020-12-04 | 福建龙净环保股份有限公司 | VOCs waste gas treatment system and VOCs waste gas treatment method |
-
2017
- 2017-04-12 CN CN201720376671.7U patent/CN206730825U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107008124A (en) * | 2017-04-12 | 2017-08-04 | 浙江奇彩环境科技股份有限公司 | A kind of system and method for handling foul gas |
| CN109455845A (en) * | 2018-04-25 | 2019-03-12 | 轻工业环境保护研究所 | A kind of vehicle repairing factory exhaust gas waste water cooperative processing method and device |
| CN109455845B (en) * | 2018-04-25 | 2021-09-21 | 轻工业环境保护研究所 | Method and device for co-processing waste gas and waste water of steam maintenance plant |
| CN109316935A (en) * | 2018-11-06 | 2019-02-12 | 广州市真诚环保科技股份有限公司 | A kind of low-temperature plasma ionization method of foul gas |
| CN112023690A (en) * | 2020-08-26 | 2020-12-04 | 福建龙净环保股份有限公司 | VOCs waste gas treatment system and VOCs waste gas treatment method |
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