CN109780546A - Improve the chromium residue detoxifying system and method that chromium slag mixes ratio - Google Patents
Improve the chromium residue detoxifying system and method that chromium slag mixes ratio Download PDFInfo
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- CN109780546A CN109780546A CN201811637302.4A CN201811637302A CN109780546A CN 109780546 A CN109780546 A CN 109780546A CN 201811637302 A CN201811637302 A CN 201811637302A CN 109780546 A CN109780546 A CN 109780546A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The invention discloses the chromium residue detoxifying system and methods that a kind of raising chromium slag mixes ratio, which includes pretreatment unit, fuel element and fume treatment unit: pretreatment unit includes ball mill, vibrosieve device and pulverizer；Fuel element includes cyclone furnace, combustion furnace and granulation box；Fume treatment unit includes superheater, flue gas waste heat recoverer, calcium hydroxide pond and solid-liquid separator；Method includes the following steps: 1) pre-treatment: chromium slag carries out ball milling, screening process；Other solid waste crush；2) burning is handled: other smashed solid waste carry out imperfect combustion, and the flue gas and chromium slag powder cofiring of generation are burnt；3) fume treatment: the flue gas that cyclone furnace generates sequentially enters superheater, flue gas waste heat recoverer, calcium hydroxide pond；This method advantages of simple is easily implemented, can be efficient, harmless processing chromium slag.
Description
Technical field
The present invention relates to chromium slag utilization technology fields, and in particular to a kind of chromium residue detoxifying system for improving chromium slag and mixing ratio
And method.
Background technique
Chromium is a kind of important metallic element.Industrial use mainly manufactures high strength alloy steel and heat-resisting, wear-resisting, corrosion resistant
Steel alloy is lost, is also commonly used in electroplating industry.Most of sexavalence compounds of chromium are toxic, irritation, corrosivity and mistake
Quick property, some chromium compounds have carcinogenic danger.Chromium slag is the solid waste discharged in chromic salts industry production process, wherein because containing
There are calcium chromate and water soluble hexavalent chromium and become poisonous and hazardous solid waste, if being utilized without detoxifying, will seriously pollute week
Collarette border, endangers people's health.
In recent years, China has initiated using the attached technology for burning processing chromium slag of cyclone furnace and has obtained initial success.This method
It is to make the chromium slag in incorporation burning coal after high-temperature fusion reduction and detoxication while cogeneration of heat and power, be discharged in the form of liquid slag,
It is cured as vitreum slag after water quenching granulating, finally also acts as building materials and reaches recycling purpose.Cyclone furnace boiler flow field
With splendid thermodynamics of reactions and reacting dynamics condition, Cr can be made6+→Cr3+Half way reduction reaction thoroughly carried out,
Its conversion ratio reaches 99.96% or more.
Currently, the processing method of chromium slag mainly has two methods of dry reduction and wet reducing.Although the improvement to chromium slag
Technology is a lot of, but always has and be not thorough in the presence of removing toxic substances or complex process or presence the problems such as small or at high cost treating capacity.This is
Present urgent problem to be solved.
Summary of the invention
The present invention is intended to provide a kind of chromium residue detoxifying system and method for improving chromium slag and mixing ratio, to reach simple process chromium
Slag, purpose at low cost, treating capacity is big.
To achieve the above object, the present invention adopts the following technical scheme:
Design a kind of chromium residue detoxifying system for improving chromium slag and mixing ratio, including pretreatment unit, fuel element and fume treatment unit:
Pretreatment unit includes ball mill, vibrosieve device and pulverizer；Ball mill is connected by belt with vibrosieve device；Burning
Unit includes cyclone furnace, combustion furnace and granulation box；Cyclone furnace is made of a secondary chamber and secondary chamber；Combustion furnace and pulverizer pipeline connect
It connects；Combustion furnace is connect by air-introduced machine with cyclone furnace pipeline；Granulation box input terminal and whirlwind furnace bottom and combustion furnace bottom pipe
Connection；Fume treatment unit includes superheater, flue gas waste heat recoverer, calcium hydroxide pond and solid-liquid separator；Superheater, flue gas
Waste-heat recoverer is successively connect with cyclone furnace pipeline；Calcium hydroxide pond is connect with flue gas waste heat recoverer output gas end pipe road；Gu
Liquid/gas separator is connect with calcium hydroxide pond pipeline.
Preferred: pretreatment unit further includes material box；Material box is connect with vibrosieve device pipeline, and material box passes through chain
Drag conveyor is connect with cyclone furnace；Fuel element further includes detritus tank；Detritus tank is fixedly connected with the slag runner of granulation box；Cigarette
Gas disposal unit further includes cooler；Cooler exports gas end pipe road with solid-liquid separator by pump and connect, and cooler passes through pump
It is connect with granulation box cooling system input water end (W.E.) pipeline.
Preferred: one secondary chamber of cyclone furnace is vertical cyclone cylinder；Feed opening is equipped in the middle part of one secondary chamber of cyclone furnace；Cyclone furnace is primary
Room is connect with cyclone furnace secondary chamber bottom by transition flue duct；Cyclone furnace secondary chamber middle and upper part is equipped with grey cigarette outlet, grey cigarette outlet
It is connected by air-introduced machine with superheater, flue gas waste heat recoverer；One secondary chamber bottom of cyclone furnace is equipped with the outlet of burning slag, and burn slag
Outlet is equipped with slag column；One secondary chamber feed opening of cyclone furnace is equipped with PLC controller.
Preferred: combustion furnace is equipped with feed opening and exhanst gas outlet；Combustion furnace feed opening is equipped with PLC controller；Combustion furnace cigarette
Gas outlet is connect by air-introduced machine with cyclone furnace feed opening pipeline.
Preferred: flue gas waste heat recoverer output hot end is connect by valve with cyclone furnace feed opening pipeline.
Preferred: vibrosieve device shines 2 layers of surface layer number, and screen size is 3~100mm.
Using above system to the detoxification of chromium slag, comprising the following steps:
(1) pre-treatment: chromium slag carries out ball milling, screening process；Other solid waste crush；
(2) burning is handled: other smashed solid waste carry out imperfect combustion, the flue gas and chromium slag powder cofiring of generation
It burns；The burning slag that cyclone furnace and combustion furnace generate enters in detritus tank through granulation box；
(3) fume treatment: the grey cigarette that cyclone furnace generates sequentially enters superheater, flue gas waste heat recoverer, calcium hydroxide pond, then
Solid-liquid separator is separated by solid-liquid separation, and the waste liquid after separation is input in granulation box after cooler cooling treatment.
It is preferred: in step (2), in parts by weight, other solid waste: coal dust=2~3:1；In parts by weight,
Flue gas: chromium slag powder=1~3:3.
Preferred: in step (3), pH control in calcium hydroxide pond is 8~10.
Compared with prior art, the beneficial technical effect of the present invention lies in:
1. system structure of the invention is compact, equipment is simple, easily implements, at low cost, processing chromium slag that can be efficient, harmless.
2. method advantages of simple of the invention is easily implemented, pollution is few, and chromium slag and other solid waste are jointly processed by, and
Can continuous processing, treating capacity is big.
3. method of the invention is also handled while handling chromium slag using two stove-cyclone furnace No. 1 and cyclone furnace 2
Other solid waste (such as solid refuses), save the cost shorten the processing time, have the effect of getting half the result with twice the effort, raising chromium
Slag is mixed than 2%~5%.
4. method of the invention respectively cools down flue gas and waste water using flue gas waste heat recoverer and cooler
Processing, the heat of collection can prepare for burning, and cooling waste water, which enters in granulation box, to be recycled, reach recycling,
Economized purpose.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of present system；
In figure, 1 it is ball mill, 2 is vibrosieve device, 3 is material box, 4 is cyclone furnace, 5 is pulverizer, 6 is combustion furnace, 7 is
Superheater, 8 be valve, 9 be flue gas waste heat recoverer, 10 be calcium hydroxide pond, 11 be solid-liquid separator, 12 be pump, 13 be cold
But device, 14 be granulation box, 15 be detritus tank.
Specific embodiment
Illustrate a specific embodiment of the invention with reference to the accompanying drawings and examples, but following embodiment is used only in detail
It describes the bright present invention in detail, does not limit the scope of the invention in any way.
Related instrument and equipment is routine instrument device unless otherwise instructed in the examples below；It is related
The raw material of industry is unless otherwise instructed commercially available regular industrial raw material；Related processing method, unless otherwise instructed,
It is conventional method.
Embodiment 1:
A kind of chromium residue detoxifying system for improving chromium slag and mixing ratio
Referring to Fig. 1, including pretreatment unit, fuel element and fume treatment unit: pretreatment unit includes ball mill 1, vibration
Sifter 2 and pulverizer 5；Ball mill 1 is connected by belt with vibrosieve device 2；Fuel element includes cyclone furnace 4, burning
Furnace 6 and granulation box 14；Cyclone furnace 4 is made of a secondary chamber and secondary chamber；Combustion furnace 6 is connect with 5 pipeline of pulverizer；Combustion furnace 6 is logical
Air-introduced machine is crossed to connect with 4 pipeline of cyclone furnace；14 input terminal of granulation box is connect with 4 bottom of cyclone furnace and 6 bottom pipe of combustion furnace；Cigarette
Gas disposal unit includes superheater 7, flue gas waste heat recoverer 9, calcium hydroxide pond 10 and solid-liquid separator 11: superheater 7, flue gas
Waste-heat recoverer 11 is successively connect with 4 pipeline of cyclone furnace；Calcium hydroxide pond 10 and flue gas waste heat recoverer 9 export gas end pipe road and connect
It connects；Solid-liquid separator 11 is connect with 10 pipeline of calcium hydroxide pond.
Embodiment 2:
A kind of chromium residue detoxifying system for improving chromium slag and mixing ratio
Difference from Example 1 is: pretreatment unit further includes material box 3；Material box 3 and 2 pipeline of vibrosieve device connect
It connects, material box 3 is connect by chain scraper conveyor with cyclone furnace 4；Fuel element further includes detritus tank 15；Detritus tank 15 and grain
The slag runner for changing case 14 is fixedly connected；Fume treatment unit further includes cooler 13；Cooler 13 passes through pump 12 and solid-liquid separator
11 output water end (W.E.) pipeline connections, cooler 13 input water end (W.E.) pipeline with 14 cooling system of granulation box by pump 12 and connect.
Embodiment 3:
A kind of chromium residue detoxifying system for improving chromium slag and mixing ratio
Difference from Example 2 is: 4 one secondary chamber of cyclone furnace is vertical cyclone cylinder；It is equipped with and adds in the middle part of 4 one secondary chamber 5 of cyclone furnace
Material mouth；4 one secondary chamber of cyclone furnace is connect with 4 secondary chamber bottom of cyclone furnace by transition flue duct；4 secondary chamber middle and upper part of cyclone furnace is equipped with
Grey cigarette outlet, grey cigarette exit are equipped with air-introduced machine, and grey cigarette outlet is connect with superheater 7,9 pipeline of flue gas waste heat recoverer；Whirlwind
4 one secondary chamber bottom of furnace is equipped with burning slag outlet (i.e. slag notch), and the outlet of burning slag is equipped with slag column；The charging of 4 one secondary chamber of cyclone furnace
Mouth Pipe installing has PLC controller；The burning slag of 4 secondary chamber bottom of cyclone furnace melting imports secondary chamber burning slag by gravity flow and goes out
Mouthful；Combustion furnace 6 is equipped with feed opening and exhanst gas outlet, and 6 feed opening of combustion furnace is equipped with PLC controller；6 feed opening of combustion furnace and crushing
The connection of 5 discharge end pipeline of machine；6 exhanst gas outlet of combustion furnace is connect by air-introduced machine with 4 feed opening pipeline of cyclone furnace；Fume afterheat returns
The output hot end of device 9 is received to connect by valve 8 with 4 feed opening pipeline of cyclone furnace.
Embodiment 4
A kind of detoxification of the chromium residue detoxifying system to chromium slag for improving chromium slag and mixing ratio
Detoxification of the chromium residue detoxifying system to chromium slag of ratio is mixed using the raising chromium slag of embodiment 2, specifically includes the following steps:
1) pre-treatment: system external power supply, chromium slag carry out ball milling in ball mill 1, then pass through Belt Conveying to vibrosieve
Device 2 carries out screening process, material box 3 is slid into finally by pipeline, to store for future use；Other solid waste (such as solid refuse)
It is crushed in pulverizer 5；
2) burning is handled: other smashed solid waste (such as solid refuse) enter combustion furnace 6 and carry out imperfect combustion, produce
Raw flue gas enters cyclone furnace 4 by pipeline and is delivered to the chromium slag powder of cyclone furnace 4 by chain scraper conveyor by material box 3
The two is burnt in cyclone furnace 4；The burning slag that cyclone furnace 4 and combustion furnace 6 generate is cooled into Water Quenching Slag through granulation box 14, then passes through
Slag runner enters in detritus tank 15；
3) fume treatment: the flue gas that cyclone furnace 4 generates enters superheater 7, flue gas waste heat recoverer 9 carries out cooling treatment, cooling
Flue gas afterwards, which enters in calcium hydroxide pond 10, carries out absorption cleaning processing (absorbable CO2、SOx、NOxDeng), calcium hydroxide pond 10
In precipitating concentrated thing directly pumped out from 10 bottom of calcium hydroxide pond, can be used as construction material.10 top of calcium hydroxide pond is molten
Liquid is separated by solid-liquid separation by solid-liquid separator 11, and for the solid sediment after separation as construction material, the waste water after separation is logical
It crosses pump 12 to be pumped into cooler 13 and carry out cooling treatment, is then input in granulation box 14 and is used as cooling fused solution slag；It is heavy
Water Quenching Slag in slag bath 15 can make ground surface material use or cement materials.
Embodiment 5
A kind of detoxification of the chromium residue detoxifying system to chromium slag for improving chromium slag and mixing ratio
Detoxification of the chromium residue detoxifying system to chromium slag of ratio is mixed using the raising chromium slag of embodiment 3, specifically includes the following steps:
1) pre-treatment: system external power supply, chromium slag carry out ball milling in ball mill 1, then pass through Belt Conveying to vibrosieve
Device 2 carries out screening process, material box 3 is slid into finally by pipeline, to store for future use；Other solid waste (such as solid refuse)
It is crushed in pulverizer 5；
2) burning is handled: other smashed solid waste (such as solid refuse) enter combustion furnace 6 and carry out imperfect combustion (its
His solid waste: coal dust=2~3:1), flue gas (CO, SO that imperfect combustion generates of generation2Deng) drawn by exhanst gas outlet
Blower extraction enters 4 feed opening of cyclone furnace through pipeline again, is delivered to 4 chromium of cyclone furnace by chain scraper conveyor by material box 3
Ground-slag is opened the heat that 8 flue gas waste heat recoverer 9 of valve is collected and is preheated to chromium slag powder, passes through 4 feed opening of cyclone furnace
PLC controller controls flue gas and chromium slag enters the amount (flue gas: chromium slag powder=1~2:3) of a secondary chamber, in the effect of a secondary chamber coal dust
Under, full combustion improves chromium slag and mixes than 2%~5%；The slag tube bank of flutterring for the transition flue duct that the burning of 4 one secondary chamber of cyclone furnace generates enters
To secondary chamber, burnt again, the flue gas of generation pass through grey cigarette outlet enter superheater 7, in flue gas waste heat recoverer 9 into
The burning slag of row cooling treatment, melting imports the outlet of secondary chamber burning slag by gravity flow；The combustion that cyclone furnace 4 and combustion furnace 6 generate
Slag is entered in granulation box 14 by pipeline, and 14 pole of granulation box is cooled into stable Water Quenching Slag, is entered finally by slag runner
Into detritus tank 15；
3) fume treatment: 4 secondary chamber of cyclone furnace generate grey cigarette through grey cigarette outlet enter superheater 7, flue gas waste heat recoverer 9 into
Row cooling treatment, flue gas after cooling, which enters in calcium hydroxide pond 10, carries out absorption cleaning processing (absorbable CO2、SO2、NOx
Deng), the precipitating concentrated thing in calcium hydroxide pond 10 is directly pumped out from 10 bottom of calcium hydroxide pond, can be used as construction material, hydrogen
10 top solution of calcium oxide is separated by solid-liquid separation by solid-liquid separator 11, the solid sediment after separation as construction material,
Waste water after separation is pumped into cooler 13 by pump 12 carries out cooling treatment, is then input in granulation box 14 as cooling molten
Melt liquid slag use；Water Quenching Slag in detritus tank 15 can make ground surface material use or cement materials.
Above-mentioned raising chromium slag is mixed in the chromium residue detoxifying system of ratio, and ball mill 1 is selected from Henan Yu Hui Machinery Co., Ltd.；Vibration
Dynamic sifter 2 is selected from Xinxiang City Xin Gong Machinery Co., Ltd.；Pulverizer 5 is selected from the just remote limited public affairs of powder technology equipment in Weifang
Department；Flue gas waste heat recoverer 9 is selected from Shandong Bang Hua Thermal Power Engineering Co., Ltd；Solid-liquid separator 11 is selected from Jiangsu such as gram ring
Protect equipment Co., Ltd；Cooler 13 is selected from Taizhou City Zheng Xing heat exchange equipment factory；Granulation box 14 is selected from Botou City Zhong Kaiji
Tool Manufacturing Co., Ltd.
The operate with method that above-mentioned raising chromium slag mixes the chromium residue detoxifying system of ratio is as follows:
Operator should first check for whether each equipment of system can work normally, and whether pipeline connection is secured.Then dispatch from foreign news agency is opened
Source, chromium slag grinding treatment in ball mill 1, the powder worn into are sieved through vibrosieve device 2, and vibrosieve device 2 shines 2 layers of surface layer number,
Screen size is 3~100mm, and the bulky grain slag sifted out, which returns in ball mill 1, continues ball milling, and the powder after sieving enters material box
3, with spare.Other solid waste (such as solid refuse) carry out pulverization process in pulverizer 5, and PLC controller parameter is arranged,
Other solid waste that control pulverizer crushes enter the amount in combustion furnace 6, carry out imperfect combustion under coal dust effect,
Burning slag enters progress pole in granulation box 14 by slag column and is cooled into Water Quenching Slag, finally discharges into detritus tank 15, not exclusively
The flue gas generated that burns enters the primary interior of cyclone furnace 4 by exhanst gas outlet；PLC controller parameter is set, flue gas, heat are controlled
With the inlet of chromium slag powder.Before chromium slag powder enters, be in combustion state in the primary interior of cyclone furnace: coal dust is in heat primary air
Rolling action under, be also referred to as vertical cyclone cylinder axially into 4 5(of cyclone furnace through turbulent burner) in, and cut to arrangement
High speed Secondary Air mixing, realize rapidly kindling, burning.In the primary indoor hair of cyclone furnace 4 under the action of chromium slag coal powder, flue gas
Raw reduction reaction, 4 room temperatures of cyclone furnace are 900~1300 DEG C, and Cr VI is reduced into trivalent chromium, improve chromium slag and mix than 2%
~5%, burning slag enters progress pole in granulation box 14 by slag column and is cooled into Water Quenching Slag, finally discharges into detritus tank 15, ash
Cigarette is entered in secondary chamber and is burnt away through the slag tube bank of flutterring of transition flue duct；Equally, in secondary chamber, grey cigarette is formed into burning is crossed
Melting burning slag by gravity flow import a secondary chamber burn slag outlet；It is entered in granulation box 14 by slag column and is extremely cooled down
Water Quenching Slag is formed, is finally discharged into detritus tank 15, and flue gas then enters superheater 7, flue gas waste heat recoverer 9 by grey cigarette outlet
It is cooled down, is entered in calcium hydroxide pond 10 later and carry out absorption processing (as absorbed the CO in flue gas2、SO2、NOxDeng) (its
Middle calcium hydroxide pond pH is 8~10), the precipitating concentrated thing in calcium hydroxide pond 10 is directly pumped out from calcium hydroxide bottom of pond portion can
As construction material, 10 top solution of calcium hydroxide pond is separated by solid-liquid separation by solid-liquid separator 11, solid sediment conduct
Construction material, isolated waste water are pumped into cooler 13 by pump 12 and carry out cooling treatment, is then input in granulation box 14 and make
It is used for cooling fused solution slag；Water Quenching Slag in detritus tank 15 can make ground surface material use or cement materials.
The present invention is described in detail above in conjunction with drawings and examples, still, those of skill in the art
Member is it is understood that without departing from the purpose of the present invention, can also carry out each design parameter in above-described embodiment
Change, forms multiple specific embodiments, is common variation range of the invention, is no longer described in detail one by one herein.
Claims (9)
1. a kind of chromium residue detoxifying system for improving chromium slag and mixing ratio, including pretreatment unit, fuel element and fume treatment unit,
Be characterized in that: the pretreatment unit includes ball mill, vibrosieve device and pulverizer；The ball mill by belt with it is described
Vibrosieve device is connected；The fuel element includes cyclone furnace, combustion furnace and granulation box；The cyclone furnace is by a secondary chamber and two
Secondary chamber is constituted；The combustion furnace is connect with the pulverizer pipeline；The combustion furnace passes through air-introduced machine and the cyclone furnace pipeline
Connection；The granulation box input terminal is connect with the whirlwind furnace bottom and combustion furnace bottom pipe；The fume treatment unit packet
Include superheater, flue gas waste heat recoverer, calcium hydroxide pond and solid-liquid separator；The superheater, flue gas waste heat recoverer are successively
It is connect with the cyclone furnace pipeline；The calcium hydroxide pond is connect with flue gas waste heat recoverer output gas end pipe road；It is described
Solid-liquid separator is connect with calcium hydroxide pond pipeline.
2. the chromium residue detoxifying system according to claim 1 for improving chromium slag and mixing ratio, it is characterised in that: the pretreatment unit
It further include material box；The material box is connect with the vibrosieve device pipeline, and the material box passes through chain scraper conveyor
It is connect with the cyclone furnace；The fuel element further includes detritus tank；The detritus tank and the fixed company of the slag runner of the granulation box
It connects；The fume treatment unit further includes cooler；The cooler exports gas end pipe road by pump and the solid-liquid separator
Connection, the cooler input water end (W.E.) pipeline with the granulation box cooling system by pump and connect.
3. the chromium residue detoxifying system according to claim 1 for improving chromium slag and mixing ratio, it is characterised in that: the cyclone furnace is primary
Room is vertical cyclone cylinder；Feed opening is equipped in the middle part of one secondary chamber of cyclone furnace；One secondary chamber of cyclone furnace and the cyclone furnace two
Secondary chamber bottom is connected by transition flue duct；Cyclone furnace secondary chamber middle and upper part is equipped with grey cigarette outlet, and grey cigarette outlet passes through air inducing
Machine is connected with the superheater, flue gas waste heat recoverer；The one secondary chamber bottom of cyclone furnace is equipped with the outlet of burning slag, and burn slag
Outlet is equipped with slag column；The one secondary chamber feed opening of cyclone furnace is equipped with PLC controller.
4. according to claim 1, raising chromium slag described in 3 mixes the chromium residue detoxifying system of ratio, it is characterised in that: the combustion furnace is set
There are feed opening and exhanst gas outlet；The combustion furnace feed opening is equipped with PLC controller；The combustion furnace exhanst gas outlet passes through air-introduced machine
It is connect with the cyclone furnace feed opening pipeline.
5. the chromium residue detoxifying system according to claim 1 for improving chromium slag and mixing ratio, it is characterised in that: the fume afterheat returns
Device output hot end is received to connect by valve with the cyclone furnace feed opening pipeline.
6. the chromium residue detoxifying system according to claim 1 for improving chromium slag and mixing ratio, it is characterised in that: the vibrosieve device
2 layers of surface layer number are shone, screen size is 3~100mm.
7. using system described in claim 1~6 any claim to the detoxification of chromium slag, it is characterised in that: including with
Lower step:
(1) pre-treatment: chromium slag carries out ball milling, screening process；Other solid waste crush；
(2) burning is handled: other smashed solid waste carry out imperfect combustion, the flue gas and chromium slag powder cofiring of generation
It burns；The burning slag that cyclone furnace and combustion furnace generate enters in detritus tank through granulation box；
(3) fume treatment: the grey cigarette that cyclone furnace generates sequentially enters superheater, flue gas waste heat recoverer, calcium hydroxide pond, then
Solid-liquid separator is separated by solid-liquid separation, and the waste liquid after separation is input in granulation box after cooler cooling treatment.
8. chromium residue detoxifying method according to claim 7, it is characterised in that: in the step (2), in parts by weight,
Other solid waste: coal dust=2~3:1；In parts by weight, flue gas: chromium slag powder=1~3:3.
9. chromium residue detoxifying method according to claim 7, it is characterised in that: in the step (3), the calcium hydroxide
PH control in pond is 8~10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811637302.4A CN109780546A (en) | 2018-12-29 | 2018-12-29 | Improve the chromium residue detoxifying system and method that chromium slag mixes ratio |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811637302.4A CN109780546A (en) | 2018-12-29 | 2018-12-29 | Improve the chromium residue detoxifying system and method that chromium slag mixes ratio |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110904329A (en) * | 2019-12-15 | 2020-03-24 | 兰州理工大学 | Pretreatment method for detoxification and comprehensive utilization of chromium slag |
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| CN102978376A (en) * | 2012-12-05 | 2013-03-20 | 武汉工程大学 | Process for reduction detoxication of chromic slag by adopting dry method |
| CN103978015A (en) * | 2014-05-20 | 2014-08-13 | 青岛理工大学 | Method and device for dry-type reduction harmless treatment of chromium slag |
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| CN110904329A (en) * | 2019-12-15 | 2020-03-24 | 兰州理工大学 | Pretreatment method for detoxification and comprehensive utilization of chromium slag |
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Application publication date: 20190521 |