CN101502839B - Harmless treatment device of solid dangerous waste - Google Patents
Harmless treatment device of solid dangerous waste Download PDFInfo
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- CN101502839B CN101502839B CN2009100966088A CN200910096608A CN101502839B CN 101502839 B CN101502839 B CN 101502839B CN 2009100966088 A CN2009100966088 A CN 2009100966088A CN 200910096608 A CN200910096608 A CN 200910096608A CN 101502839 B CN101502839 B CN 101502839B
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- fenton oxidation
- stabilisation
- tail gas
- harmless treatment
- solidification equipment
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Abstract
The invention discloses a solid hazardous waste decontaminating treatment device, comprising a Fenton oxidation detoxication reaction device, a stabilization/solidification device and tail gas absorption devices, the Fenton oxidation detoxication reaction device is connected with an agitation conveying device, a pipeline of which is respectively connected with a feed hopper, an H2O2 dosing deviceand a ferrite dosing device; the Fenton oxidation detoxication reaction device is connected with the stabilization/solidification device via a conveying belt above which a stabilization/solidification medicine dosing device is arranged; both the Fenton oxidation detoxication reaction device and the stabilization/solidification device are provided with the tail gas absorption devices. The inventive device can oxide and fix the pollutants of the solid hazardous wastes to reduce hazard of contaminating the environment, and meanwhile, avoids secondary contamination resulted from waste gas. The Fenton oxidation detoxication reaction device and the stabilization/solidification device in the inventive device can be used in a disassembled state in order to treat the solid hazardous wastes having simple ingredients.
Description
Technical field
The present invention relates to a kind of harmless treatment device of solid dangerous waste, specifically be meant the toxic organic compound in a kind of Fenton oxidation technology oxidation hazardous waste that adopts solid system and adopt the fixedly treating apparatus that combines of the toxic metals in the waste residue of stabilisation/curing technology.
Background technology
Solid dangerous waste be meant list in national hazardous waste register or according to the hazardous waste judging standard of national regulation and discrimination method identification have one or more dangerous features such as corrosivity, toxicity, inflammability, reactivity and infectivity, and do not get rid of solid waste with dangerous feature.At the character of present solid dangerous waste, the general employing burned or stabilisation/two kinds of processing methods of curing.Burn and generally be applicable to organic pollution, its equipment and burning expense are higher; Stabilisation/curing then is used for the processing of inorganic matter such as poisonous heavy metal, metalloid etc.When containing organic pollution and inorganic pollution simultaneously in the refuse, producing waste residue as organo-arsenic feed additive industry (phenalgin arsenic acid and Luo Keshasheng) had not only contained the nitrobenzene toxic organic compound but also had contained metalloid such as arsenic, intractability increases, the current research report that does not still have this aspect.
Summary of the invention
The invention provides a kind of harmless treatment device of solid dangerous waste, handle the treatment process that combines based on solid system Fenton oxidation processes with stabilisation/curing, realize the degraded of toxic organic compound in the waste residue, simultaneously toxic metals in the waste residue or metalloid are fixed, do not produced secondary pollution simultaneously.
A kind of harmless treatment device of solid dangerous waste mainly comprises Fenton oxidation detoxification reaction device, stabilisation/solidification equipment and device for absorbing tail gas, described Fenton oxidation detoxification device is connected with stabilisation/solidification equipment by conveyer belt, and Fenton oxidation detoxification device and stabilisation/solidification equipment are equipped with device for absorbing tail gas.
Described Fenton oxidation detoxification device is connected to stirring conveying device, is connected to feed hopper, H on the pipeline of stirring conveying device respectively
2O
2Chemicals dosing plant and ferrous salt chemicals dosing plant.
Described conveyer belt one end links to each other with the discharge port of Fenton oxidation detoxification device, and the other end links to each other with the stabilisation/curing reaction groove of stabilisation/solidification equipment, and the conveyer belt top is provided with stabilisation/curing medicament chemicals dosing plant.
Be provided with mixer in described stabilisation/solidification equipment reactive tank.
Described device for absorbing tail gas is arranged on the top or the side of Fenton oxidation detoxification device and stabilisation/solidification equipment.
Waste residue is in Fenton oxidation detoxification reaction device and H
2O
2Carry out solid system Fenton oxidation reaction with ferrous salt, the oxidized degraded of organic matter, the waste gas that produces in the course of reaction is handled the back discharging by exhaust gas processing device; Waste residue enters stabilisation/solidification equipment by conveyer belt afterwards, and dosing in waste residue in the course of conveying is fixed toxic metals or metalloid in stabilisation/solidification equipment, and the waste gas that produces in the course of reaction is handled the back discharging by exhaust gas processing device.
Apparatus of the present invention can be also fixing with the polluter oxidation of solid hazardous waste residue by Fenton oxidation detoxification device and stabilisation/solidification equipment, reduces the risk to environment.Device for absorbing tail gas at Fenton oxidation detoxification device and stabilisation/solidification equipment top can effectively absorb the tail gas that produces in the processing procedure, the secondary pollution of avoiding waste gas to bring.
Apparatus of the present invention also can be taken Fenton oxidation detoxification device and stabilisation/solidification equipment apart, handle the simple solid dangerous waste of composition, adopt Fenton oxidation detoxification device such as containing poisonous organic solid hazardous waste residue, the solid hazardous waste residue that contains poisonous inorganic matter adopts stabilisation/solidification equipment.This appliance arrangement is simple, and processing ease is easily by manufacturing enterprise, the solid acceptance such as disposing enterprise of giving up.
Description of drawings
Fig. 1 is apparatus of the present invention schematic diagram.
The specific embodiment
Hazardous waste harmless treatment device as shown in Figure 1, mainly comprise Fenton oxidation detoxification reaction device and stabilisation/solidification equipment, Fenton oxidation detoxification device is connected with stabilisation/solidification equipment by conveyer belt, conveyer belt one end links to each other with Fenton oxidation detoxification bottom of device discharge port, the other end links to each other with the stabilisation/curing reaction groove of stabilisation/solidification equipment, and the conveyer belt top is provided with chemical feed pipe.The top of Fenton oxidation detoxification device is provided with exhaust gas processing device---spray absorber, and the top of stabilisation/solidification equipment is provided with device for absorbing tail gas---gas skirt and spray absorber.
Fenton oxidation detoxification device is connected to stirring screw conveyer, is connected to feed hopper, H on the pipeline of stirring screw conveyer respectively
2O
2Chemical feed pipe and ferrous salt chemical feed pipe.
Be provided with screw mixer in described stabilisation/solidification equipment reactive tank.
Producing waste residue (containing arsenic nitrobenzene-containing noxious material) with organic arsenic feed additive is example:
Solid hazardous waste residue enters Fenton oxidation detoxification reaction device from hopper by stirring screw conveyer, and the ferrous and mass percentage concentration of Fenton reagent of sulfuric acid is the H of 10-30%
2O
2Enter Fenton detoxification oxidation reaction apparatus from two chemical feed pipes respectively, the dosage of ferrous sulfate is the 0.04t/t waste residue, and the dosage of hydrogen peroxide is 0.5m
3/ t waste residue, the organic compounds that produces in the Fenton oxidizing process is handled the back discharging by spray absorber with dilute sulfuric acid.
After Fenton reaction finished, the turnover toxic concentration of nitrobenzene in the sample analysis waste residue reached and can carry out stabilisation/curings after the relevant criterion and handle, and as if below standard, then add Fenton reagent again and carries out detoxification.
Waste residue enters stabilisation/curing reaction groove through dump skip by conveyer belt, stabilisation/curing medicament---iron chloride, magnesium chloride, white lime and the cement chemical feed pipe from the conveyer belt successively adds, the dosage of iron chloride is the 0.15-0.25t/t waste residue, the dosage of magnesium chloride is the 0.10-0.30t/t waste residue, the dosage of white lime is the 0.15-0.25t/t waste residue, the dosage 1.4-2.0t/t waste residue of cement.The sour gas that produces in the stabilization reactions process is handled the back discharging by gas skirt and spray absorber with alkali lye.
The back discharging molding that stirs, then again maintenance 7-11 days.Detect there being arsenic to pass in and out toxic concentration then, can keep in after reaching relevant criterion, otherwise carry out stabilisation again behind the broken cured block/curings processing, until up to standard.
The waste gas absorption liquid is by suitably handling, organic pollution as absorption liquid in the solid system Fenton oxidation technology is removed by the Fenton oxidation processes, absorption liquid can be used for solidifying and handle, so this harmless treatment process will not produce waste water by adjusting the pH value in the stabilization process.
Through above-mentioned processing, nitrobenzene matters leaches toxic concentration and reduces to 19.8mg/L from 600-800mg/L, and wherein nitrobenzene leaches toxic concentration and reduces to 0.5-1.0mg/L from 50mg/L; Arsenic leaches toxic concentration and reduces to 0.98-3.1mg/L from 700-1000mg/L.
Claims (6)
1. harmless treatment device of solid dangerous waste, comprise Fenton oxidation detoxification reaction device, stabilisation/solidification equipment and device for absorbing tail gas, described Fenton oxidation detoxification device is connected to stirring conveying device, is connected to feed hopper, H on the pipeline of stirring conveying device respectively
2O
2Chemicals dosing plant and ferrous salt chemicals dosing plant; Described Fenton oxidation detoxification device is connected with stabilisation/solidification equipment by conveyer belt, and the conveyer belt top is provided with stabilisation/curing medicament chemicals dosing plant; Fenton oxidation detoxification device and stabilisation/solidification equipment are equipped with device for absorbing tail gas.
2. harmless treatment device of solid dangerous waste as claimed in claim 1 is characterized in that: be provided with reactive tank in described stabilisation/solidification equipment, be provided with mixer in the described reactive tank.
3. harmless treatment device of solid dangerous waste as claimed in claim 1 is characterized in that: described Fenton oxidation detoxification device top or side are provided with device for absorbing tail gas.
4. harmless treatment device of solid dangerous waste as claimed in claim 3 is characterized in that: the device for absorbing tail gas that described Fenton oxidation detoxification device top or side are provided with is a spray absorber.
5. harmless treatment device of solid dangerous waste as claimed in claim 1 is characterized in that: described stabilisation/solidification equipment top or side are provided with device for absorbing tail gas.
6. harmless treatment device of solid dangerous waste as claimed in claim 5 is characterized in that: the device for absorbing tail gas that described stabilisation/solidification equipment top or side are provided with is gas skirt and spray absorber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100966088A CN101502839B (en) | 2009-03-10 | 2009-03-10 | Harmless treatment device of solid dangerous waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100966088A CN101502839B (en) | 2009-03-10 | 2009-03-10 | Harmless treatment device of solid dangerous waste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101502839A CN101502839A (en) | 2009-08-12 |
| CN101502839B true CN101502839B (en) | 2010-07-28 |
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| CN2009100966088A Active CN101502839B (en) | 2009-03-10 | 2009-03-10 | Harmless treatment device of solid dangerous waste |
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| CN110479730A (en) * | 2019-04-30 | 2019-11-22 | 武汉永清环保科技工程有限公司 | A method of for the easily broken solid-state hazardous waste of boiler of power plant cooperative disposal |
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