CN209276594U - The device of variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination - Google Patents
The device of variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination Download PDFInfo
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- CN209276594U CN209276594U CN201821985293.3U CN201821985293U CN209276594U CN 209276594 U CN209276594 U CN 209276594U CN 201821985293 U CN201821985293 U CN 201821985293U CN 209276594 U CN209276594 U CN 209276594U
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Abstract
The utility model discloses the devices that variable valency metal in dangerous solid waste is recycled in a kind of low-temperature reduction chlorination, device includes raw material chopper, charger, material hybrid heating device and product collecting device, raw material chopper is connect with charger, charger is connect with material hybrid heating device, and material hybrid heating device is connect with product collecting device；Material hybrid heating device includes Hybrid Heating room, agitating shaft and heating rod；The shell of Hybrid Heating room is equipped with feed inlet, catalyst inlet, hydrochloric acid entrance, first row port and second exhaust port, and agitating shaft is protruded into Hybrid Heating room from the top center of Hybrid Heating room and connect with the sealing cover of Hybrid Heating room bottom；Heating rod is affixed on the inner wall of Hybrid Heating room；Product collecting device includes the first recovery area and the second recovery area, and the first recovery area is connect with second exhaust port and the second recovery area respectively, and the second recovery area is provided with lye.The apparatus structure is simple and convenient to operate, is practical.
Description
Technical field
It is the utility model relates to the cycling and reutilization field of the cleaning treatment of dangerous solid waste and resource, in particular to a kind of low
The detoxification treatment device for recycling variable valency metal (chromium, arsenic etc.) in dangerous solid waste is extracted in temperature reduction chlorination.
Background technique
Variable valency metal (chromium, arsenic etc.) pollution is mainly derived from chemical raw material and chemical product manufacturing, non-ferrous metal metallurgy
And industries, the dangerous solid waste containing variable valency metal such as calendering processing industry, nonmetallic ore selecting industry are with chromium residue and arsenic-containing waste residue
It is main.There are calcium roasting and calcium-free roasting technique that can generate chromium residue used in during chromium salt production.Wherein there is calcium roasting
Technique is every, which to generate 1 ton of product, will just generate 2-3 tons of chromium slag, although calcium-free roasting significantly reduces chromium slag discharge amount and therein
Content of 6-valence Cr ions, but risk still remains.In consideration of it, some developed countries constantly compress in order to get rid of chromium slag contaminated puzzlement
Chromium salt production ability is changed to from developing country's import chromic salts product.China has become the production of chromic salts and using big at present
State, yield and consumption figure rank first in the world and chromium slag yield and the most country of heap reserves.Most important arsenic-containing waste residue packet
Two kinds are included, one is by the soil of arsenic pollution, another kind is the tailing containing arsenic generated in metallurgical process.In addition to this, there are also one
Also contain the higher arsenic of concentration in a little deposits and biologic garbage, can do great harm to the environment.Therefore, it can will contain and appraise at the current rate
The dangerous solid waste removing toxic substances of metal can recycle the roadmap of variable valency metal resource again, and it is dangerous containing variable valency metal to have become processing
The important thinking of solid waste.
The innoxious of the solid waste of danger containing variable valency metal mainly carries out in-situ reducing/fixation to it to reduce its toxicity and move
Shifting property, metal is still in solid waste.Even a large amount of presence in the environment also can band it is known that the trivalent chromium or arsenic of low toxicity
Come chromium in soil, arsenic enrichment and enter human foods chain, human health will be endangered for a long time.Moreover three in the solid waste after detoxification
Valence chromium or arsenic are it is possible to be reoxidized into Cr VI under the conditions of long oxidation or under the action of manganese oxidizing bacteria in the environment
Or pentavalent arsenic, there is secondary toxicity.Therefore, more preferably settling mode is to mention the chromium contained in variable valency metal danger solid waste or arsenic
Take and be back to use in industry --- fundamentally reduce poisonous and harmful substance, while the strategy metal money that recycling and reusing is rare
Source.It in this sense, is dangerous containing variable valency metal by innoxious being combined with recycling of variable valency metal danger solid waste
The important development direction of solid waste Controlling research.Therefore, how economical and efficient will contain variable valency metal danger solid waste detoxification treatment, simultaneously
Realize the recovery processing of variable valency metal resource, exploitation novel process device is urgent problem instantly.
Utility model content
The purpose of the utility model is to overcome the defect of the prior art and deficiencies, provide a kind of low-temperature reduction chlorination time
The device of variable valency metal in dangerous solid waste is received, which is provided with heating rod and agitating shaft, and the indoor temperature of Hybrid Heating maintains
In lower temperature, product volatilization efficiency and variable valency metal recovery efficiency are improved.The apparatus structure is simple and convenient to operate, is practical
Property is strong.
The purpose of this utility model can be achieved through the following technical solutions:
The device of variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination, including raw material chopper, charger, material mix
It closes heating device and product collecting device, the raw material chopper is connect with the charger, the charger and the object
Expect hybrid heating device connection, the material hybrid heating device is connect with the product collecting device；The material mixing adds
Thermal includes Hybrid Heating room, agitating shaft and heating rod；The shell of the Hybrid Heating room is equipped with feed inlet, catalyst
Entrance, hydrochloric acid entrance, first row port and second exhaust port, top center position of the agitating shaft from the Hybrid Heating room
It sets and protrudes into the Hybrid Heating room and connect with the sealing cover of Hybrid Heating room bottom；The heating rod is affixed on described mixed
Close the inner wall of heating room；The product collecting device includes the first recovery area and the second recovery area, the first recovery area difference
It is connect with the second exhaust port and the second recovery area, second recovery area is provided with lye.
Be provided with multi-disc flabellum on the agitating shaft as a preferred technical solution, the diameter of the flabellum be greater than etc.
In 300mm.Agitating shaft makes raw material stirring more evenly by the upward feeding in center.
It is provided at the Hybrid Heating chamber interior top as a preferred technical solution, and stirs scraping for axis connection with described
Piece.Scraping blade can understand the catalyst crystal for condensing in Hybrid Heating ceiling portion.
It is provided with corrosion-resistant finishes in the inner walls of the Hybrid Heating room as a preferred technical solution, in shell
Insulating layer is provided between inside and outside wall.Insulating layer can effectively improve the thermal insulation property of Hybrid Heating room.
First recovery area, the second recovery area outside are equipped with insulation blanket as a preferred technical solution,.Insulation blanket can have
Effect improves the thermal insulation property in the first recovery area and the second recovery area.
The heating temperature range of the heating rod is 300 degree to 500 degree as a preferred technical solution,.This temperature model
It encloses, so that it may achieve the purpose that object is mutually reformed, not need excessively high temperature, and favors low temperature volatilizees in product.
Electromagnetic valve is provided at the feed inlet as a preferred technical solution,.
The utility model compared with prior art, is had the following advantages and beneficial effects:
1, the device of variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination provided by the utility model, which passes through
Heating rod and agitating shaft are set, the indoor temperature of Hybrid Heating is made to maintain 300-500 DEG C, is filled compared to general chloridising roasting
It sets, temperature is lower, and favors low temperature volatilizees in product.
2, the device of variable valency metal in dangerous solid waste, side easy to operate are recycled in low-temperature reduction chlorination provided by the utility model
Just, practical.The device is able to achieve the detoxification treatment of the solid waste of danger containing variable valency metal, and by variable valency metal from dangerous solid waste
It extracts, solves the problems, such as that variable valency metal is separated with solid particle difficulty in dangerous solid waste, improves the separation of variable valency metal
Efficiency and recovery efficiency.
3, the device of variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination provided by the utility model, by heated
Cr VI or pentavalent arsenic are reduced to trivalent chromium or trivalent arsenic by the reduction reaction in journey, and treated, and solid slag meets country
The requirement of standard (HJ/T301-2007) general industry solid slag.
4, turn waste into wealth while the utility model reduces environmental pollution, variable valency metal recycled with high level industrial products,
Additional economic value is created, there is very strong reality and environment protection significance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that variable valency metal device in dangerous solid waste is recycled in the utility model embodiment
Wherein: 1: raw material chopper, 2: charger, 3: material hybrid heating device, 31: Hybrid Heating room, 311: heat preservation
Layer, 312: corrosion-resistant finishes, 313: hydrochloric acid entrance, 314: catalyst inlet, 315: scraping blade, 316: sealing cover, 317: first row
Port, 318: second exhaust port, 32: agitating shaft, 321: flabellum, 322: motor, 33: heating rod, 4: product collecting device, 42:
First recovery area, 41: the second recovery areas
Specific embodiment
The present invention will be further described in detail with reference to the embodiments and the accompanying drawings, but the implementation of the utility model
Mode is without being limited thereto.
It appraises at the current rate in dangerous solid waste as shown in Figure 1, providing a kind of low-temperature reduction chlorination in the utility model embodiment and recycling
The device of metal, the device include raw material chopper 1, charger 2, material hybrid heating device 3 and product collecting device 4.
Raw material chopper 1 is connect with charger 2, and raw material chopper 1 can crush raw material.Charger 2 and material Hybrid Heating fill
3 feed inlet connection is set, smashed raw material is transported in material hybrid heating device 3 by charger 2 by conveyance conduit.Object
Material hybrid heating device 3 is connect with product collecting device 4, and raw material mixes in material hybrid heating device 3, heats and concurrently survive
Original reaction, completes the recycling of variable valency metal in product collecting device 4 later.
Material hybrid heating device 3 includes Hybrid Heating room 31, agitating shaft 32 and heating rod 33.Hybrid Heating room 31
Shell is equipped with feed inlet, catalyst inlet 314, hydrochloric acid entrance 313, first row port 317 and second exhaust port 318.Into
Material mouth is used for transferring raw material, and catalyst inlet 314 is for conveying catalyst, and hydrochloric acid entrance 313 is for conveying hydrochloric acid.Second exhaust
Mouth 318 is connect with product collecting device 4.In Hybrid Heating room 31 in raw material whipping process, second exhaust port 318 is closed, and first
Exhaust outlet 317 is for being discharged the carbon dioxide generated in raw material whipping process.In Hybrid Heating room 31 in raw material heating process, the
One exhaust outlet 317 and second exhaust port 318 are all opened, and first row port 317 is passed through reducing atmosphere gas as air inlet.Mixing
It heats in room 31 after raw material heating, first row port 317 is closed.
The housing exterior walls of Hybrid Heating room 31 are made of 304 stainless steel materials, and inner wall is made of 316L stainless steel material.Shell
It is provided with corrosion-resistant finishes 312 on internal wall, insulating layer 311 is provided between shell inside and outside wall.Insulating layer 311 can be improved mixed
Close the thermal insulation property of heating room 31.The scraping blade 315 connecting with agitating shaft 32 is provided at 31 inside top of Hybrid Heating room.Mixing
Partial catalyst volatilization is had in heating room 31 when heating, catalyst condenses in the inside top of Hybrid Heating room, scraping blade to the cold
315 rotate with agitating shaft, the catalyst crystal of condensation can be removed, improve the service efficiency of catalyst.
Agitating shaft 32 protruded into Hybrid Heating room 31 from the top center of Hybrid Heating room 31 and with Hybrid Heating room
The sealing cover 316 of bottom connects.Multi-disc flabellum 321 is provided on agitating shaft 32, the diameter of flabellum is more than or equal to 300mm.It stirs
When mixing, by center, up feeding enables raw material to accomplish to stir evenly to agitating shaft, and 32 external motor 322 of agitating shaft, raw material is mixing
It heats motor 322 in the interior stirring in room 31 and heating process to rotate forward, agitating shaft 32 stirs raw material；Raw material stops in Hybrid Heating room 31
When motor 322 inverts after only heating, agitating shaft 32 is as feeding mechanism discharge treated powder.
Heating rod 33 is affixed on the inner wall of Hybrid Heating room 31, for heating to Hybrid Heating room 31.The heating of heating rod 33
Temperature range is 300 degree to 500 degree.
Product collecting device 4 include the first recovery area 42 and the second recovery area 41, the first recovery area 42 respectively with second row
Port 318 and the connection of the second recovery area 41, the second recovery area 41 is provided with lye.First recovery area 42 and the second recovery area 41
Outside is designed with insulation blanket, and the first recovery area 42 is kept the temperature at 250 degree to 300 degree.
Embodiment one
In the present embodiment, the device of variable valency metal in dangerous solid waste is recycled using low-temperature reduction chlorination, carries out variable valency metal
Recycling:
Chromium slag is entered to raw material chopper crushing in a manner of continuous feed, material mixing is then delivered to by charger and is added
In thermal, keeping material quantity in material hybrid heating device is 100kg；
60kg magnesium chloride and 60kg hydrochloric acid are passed through into catalyst inlet respectively and hydrochloric acid entrance is added in Hybrid Heating room, is opened
Dynamic agitating shaft, the raw material for being sent into magnesium chloride and hydrochloric acid with charger are uniformly mixed；
Close catalyst inlet, hydrochloric acid entrance and charger entrance, be passed through nitrogen from first row port, at the same with 20 DEG C/
The rate of heat addition of min is warming up to 300 DEG C, carries out low-temperature bake in a reducing atmosphere and handles 3h；
First row port is closed, the gas generated in roasting process is discharged from the second exhaust port of Hybrid Heating room, the
One recovery area controls temperature, makes magnesium chloride condensing recovery, is then passed through lye in the second recovery area, obtains chromium hydroxide precipitation,
It washs and dries, obtain waste liqouor product.
It is 496mg/L that the original chromium slag of the present embodiment, which leaches hexavalent chromium concentration, and detoxification slag leaches hexavalent chromium concentration after processing
For 0.85mg/L.
Embodiment two
In the present embodiment, the device of variable valency metal in dangerous solid waste is recycled using low-temperature reduction chlorination, carries out variable valency metal
Recycling:
Chromium slag is entered to raw material chopper crushing in a manner of continuous feed, material mixing is then delivered to by charger and is added
In thermal, keeping material quantity in material hybrid heating device is 500kg；
250kg magnesium chloride and 250kg hydrochloric acid are passed through into catalyst inlet respectively and Hybrid Heating room is added in hydrochloric acid entrance, is opened
Dynamic agitating shaft, the raw material for being sent into magnesium chloride and hydrochloric acid with charger are uniformly mixed；
Close catalyst inlet, hydrochloric acid entrance and charger entrance, be passed through nitrogen from first row port, at the same with 40 DEG C/
The rate of heat addition of min is warming up to 500 DEG C, carries out low-temperature bake in a reducing atmosphere and handles 4h；
First row port is closed, the gas generated in roasting process is discharged from the second exhaust port of Hybrid Heating room, the
One recovery area controls temperature, makes magnesium chloride condensing recovery, is then passed through lye in the second recovery area, obtains chromium hydroxide precipitation,
It washs and dries, obtain waste liqouor product.
It is 715mg/L that the original chromium slag of the present embodiment, which leaches hexavalent chromium concentration, and detoxification slag leaches hexavalent chromium concentration after processing
For 0.92mg/L.
Embodiment three
In the present embodiment, the device of variable valency metal in dangerous solid waste is recycled using low-temperature reduction chlorination, carries out variable valency metal
Recycling:
Arsenic slag is entered raw material chopper to crush in a manner of continuous feed, material mixing is then delivered to by charger and is added
In thermal, keeping material quantity in material hybrid heating device is 500kg；
300kg ammonium chloride and 300kg hydrochloric acid are passed through into catalyst inlet respectively and hydrochloric acid entrance is added in Hybrid Heating room,
Start agitating shaft, the raw material for being sent into ammonium chloride and hydrochloric acid with charger is uniformly mixed；
Close catalyst inlet, hydrochloric acid entrance and charger entrance, be passed through nitrogen from first row port, at the same with 40 DEG C/
The rate of heat addition of min is warming up to 500 DEG C, carries out low-temperature bake in a reducing atmosphere and handles 4h；
First row port is closed, the gas generated in roasting process is discharged from the second exhaust port of Hybrid Heating room, the
One recovery area controls temperature, makes ammonium chloride condensing recovery, is then passed through lye in the second recovery area, obtains elemental arsenic precipitating, washes
It washs and dries, obtain arsenic recycling product.
It is 328mg/L that the original chromium slag of the present embodiment, which leaches pentavalent arsenic concentration, and detoxification slag leaches pentavalent arsenic concentration after processing
For 0.56mg/L.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. the device that variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination, which is characterized in that including raw material chopper, charging
Machine, material hybrid heating device and product collecting device, the raw material chopper are connect with the charger, the charger
It is connect with the material hybrid heating device, the material hybrid heating device is connect with the product collecting device；
The material hybrid heating device includes Hybrid Heating room, agitating shaft and heating rod；The shell of the Hybrid Heating room
It is equipped with feed inlet, catalyst inlet, hydrochloric acid entrance, first row port and second exhaust port, the agitating shaft is mixed from described
The top center for closing heating room is protruded into the Hybrid Heating room and is connect with the sealing cover of Hybrid Heating room bottom；
The heating rod is affixed on the inner wall of the Hybrid Heating room；
The product collecting device include the first recovery area and the second recovery area, first recovery area respectively with the second row
Port and the connection of the second recovery area, second recovery area is provided with lye.
2. the device that variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination according to claim 1, which is characterized in that
Multi-disc flabellum is provided on the agitating shaft.
3. the device that variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination according to claim 2, which is characterized in that
The diameter of the flabellum is more than or equal to 300mm.
4. the device that variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination according to claim 1, which is characterized in that
The scraping blade with the stirring axis connection is provided at the top of the Hybrid Heating chamber interior.
5. the device that variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination according to claim 1, which is characterized in that
Corrosion-resistant finishes is provided in the inner walls of the Hybrid Heating room.
6. the device that variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination according to claim 1, which is characterized in that
Insulating layer is provided between the shell inside and outside wall of the Hybrid Heating room.
7. the device that variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination according to claim 1, which is characterized in that
Insulation blanket is equipped with outside first recovery area.
8. the device that variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination according to claim 1, which is characterized in that
Insulation blanket is equipped with outside second recovery area.
9. the device that variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination according to claim 1, which is characterized in that
The heating temperature range of the heating rod is 300 degree to 500 degree.
10. the device of variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination according to claim 1, feature exists
In being provided with electromagnetic valve at the feed inlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821985293.3U CN209276594U (en) | 2018-11-29 | 2018-11-29 | The device of variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination |
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| CN201821985293.3U CN209276594U (en) | 2018-11-29 | 2018-11-29 | The device of variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109593964A (en) * | 2018-11-29 | 2019-04-09 | 华南理工大学 | The device and method of variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination |
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2018
- 2018-11-29 CN CN201821985293.3U patent/CN209276594U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109593964A (en) * | 2018-11-29 | 2019-04-09 | 华南理工大学 | The device and method of variable valency metal in dangerous solid waste is recycled in low-temperature reduction chlorination |
| WO2020108188A1 (en) * | 2018-11-29 | 2020-06-04 | 华南理工大学 | Apparatus and method for recovering variable valence metals from hazardous solid wastes by low-temperature reductive chlorination |
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