CN107512856A - A kind of method using cement kiln synergic processing acid-base waste fluid and abraum salt - Google Patents

A kind of method using cement kiln synergic processing acid-base waste fluid and abraum salt Download PDF

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Publication number
CN107512856A
CN107512856A CN201710600158.6A CN201710600158A CN107512856A CN 107512856 A CN107512856 A CN 107512856A CN 201710600158 A CN201710600158 A CN 201710600158A CN 107512856 A CN107512856 A CN 107512856A
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acid
cement kiln
waste
cement
waste heat
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李春萍
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Golmud Hongyang Environmental Protection Technology Co Ltd
Golden Round Cement Ltd By Share Ltd
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Golmud Hongyang Environmental Protection Technology Co Ltd
Golden Round Cement Ltd By Share Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/44—Burning; Melting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/70—Blending

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

The invention discloses a kind of method using cement kiln synergic processing acid-base waste fluid and abraum salt, including pumping, pre-processing, distilling, 5 steps of mixing material, distilling apparatus wherein used in still-process is made up of the destilling tower of 5 series connection, many levels are set inside destilling tower, are followed successively by gravel layer, quartz sand layer, gauze, material bed and steam collecting layer from the bottom to top；The material after distillation column distillation by 5 series connection of distilling apparatus is sent into cement grinding mill, and cement is produced as mixing material.The present invention burns the high concentrated acid alkali wasteliquid with certain calorific value using cement kiln high-temperature section, while produces cement, reduces harm of the hazardous waste to environment.

Description

A kind of method using cement kiln synergic processing acid-base waste fluid and abraum salt
Technical field
The present invention relates to hazardous waste disposal field, more particularly to the processing of acid-base waste fluid, abraum salt and cement kiln collaboration Disposal field, for the technology of cement kiln synergic processing high concentrated acid alkali wasteliquid and abraum salt.
Background technology
In many chemical process systems, the processing disposal of spent acid is one of the problem of many enterprises is anxious to be resolved.One side Face is in order to ensure normally to produce, it is necessary to which spent acid is handled；On the other hand, environmental pollution caused by also solving therefrom and Protection problem.Processing of the China for spent acid has strict requirements, and all parts of the country suffer from different discharge standards and punishment is advised Model, wherein mostly with PH=7（It is i.e. neutral）For spent acid discharge standard.Spent acid is in addition to acidity, also containing substantial amounts of impurity.Root According to the difference of spent acid, waste water composition and management goal, the administering method used both at home and abroad at present is broadly divided into 3 major classes：Recovery Use, comprehensively utilize and neutralisation treatment again.But, it has to arouse attention, even if reach after acid-base neutralization country and The industrial waste acid of regional discharge standard still has the possibility of heavy metals exceeding standard.
Salkali waste is caused spent lye, solid base and alkaline residue (PH during industrial production, preparation, use>=12.5 Liquid alkali).The main source of salkali waste have industrial chemical manufacture, chemical analysis and test, the derusting of metal and other products and Cleaning, wastewater treatment, textile printing and dyeing pre-treatment, papermaking wastewater etc..
Cement kiln is the critical facility of developed country's processing hazardous waste, has been obtained for extensive accreditation and application.Moral The developed countries such as state, Switzerland, France, Britain, Italy, Norway, Sweden, the U.S., Canada, Japan utilize cement kiln processing danger Existing more than the 20 years history of dangerous waste, the high heating value such as substantial amounts of damaged tire/rubber, waste oil, useless emulsifying agent, spent organic solvent are organic Waste is being handled and utilized as manufacture of cement alternative fuel, and blast-furnace cinder, flyash, non-ferrous metal slag, rubbish The inorganic mineral material such as incineration residue, sludge, mud waste is then handled and utilized as manufacture of cement alternative materials.China Cement plant has excellent tradition in terms of handling and utilizing solid waste, and larger achievement is achieved in development for many years. The flyash of most of the country, slag, pyrite cinder etc. are all utilized and handled in cement plant at present.But with prosperity Country compares, and China's cement industry also has larger gap in terms of disposal and using solid waste, especially in hazardous waste Processing and use aspects are still in the starting stage, lack workable technology.
The content of the invention
The problem to be solved in the present invention is to provide a kind of technology using cement kiln synergic processing high concentrated acid alkali wasteliquid.This The purpose of invention is achieved through the following technical solutions.
A kind of method using cement kiln synergic processing acid-base waste fluid and abraum salt, comprise the following steps：
A, waste liquid mixes：Spent acid is poured into acid-base neutralization storehouse with salkali waste to be neutralized, and adds abraum salt, after obtaining acid-base neutralization Waste liquid and abraum salt mixture, i.e. neutral blends material；Agitating device and pH, liquid level, time are provided with acid-base neutralization storehouse Detection means, mixing speed are 120 ~ 240r/h；
B, pump：Neutral blends material is pumped into pretreatment unit, pump output is controlled in 1 ~ 2t/h；Pretreatment unit is disk The stainless steel stove of shape, top are provided with latticed sprayer unit, and there is electronic ignition device on periphery；
C, pre-process：The depth of neutral blends material in pretreatment unit is set to keep 0.5 ~ 1.0m；Alcohol is sprayed into pretreatment dress The sprayer unit in top set portion, persistently sprays into alcohol, lights a fire while spraying, keeps 30 ~ 60min of burning；Flue gas after burning enters Enter cement plant dangerous waste gas handling system；
D, distill：Distilling apparatus is pumped into by pretreated neutral blends material；The distilling apparatus is by 5 distillations connected Tower forms, and the destilling tower top is cylinder, and bottom is taper, sets many levels inside destilling tower, from the bottom to top successively For gravel layer, quartz sand layer, gauze, material bed and steam collecting layer；The neutral blends material is arranged on material bed；
The waste heat of part of cement kiln grate-cooler high temperature section is introduced first and steamed by the high temperature resistant airduct for having refractory material using internal block Evaporate at tower lower height 1/3 ~ 1/5, the technological parameter of waste heat is：760 ~ 780 DEG C of temperature, 10000 ~ 30000m of air quantity3/ h, instead It is 1.5 ~ 3.5h between seasonable；
Material after the first distillation column distillation is sent into after-fractionating tower through spiral, has the resistance to of refractory material using inside block High temperature airduct introduces the waste heat of part of cement kiln fourth stage preheater at after-fractionating tower lower height 1/3 ~ 1/5, waste heat Technological parameter is：800 ~ 810 DEG C of temperature, 10000 ~ 30000m of air quantity3/ h, reaction time are 1.5 ~ 3.5h；
Material after after-fractionating column distillation is sent into the 3rd destilling tower through spiral, has the resistance to of refractory material using inside block High temperature airduct introduces the waste heat of part of cement kiln level V preheater at the 3rd destilling tower lower height 1/3 ~ 1/5, waste heat Technological parameter is：850 ~ 860 DEG C of temperature, 10000 ~ 30000m of air quantity3/ h, reaction time are 1.5 ~ 3.5h；
Material after the 3rd distillation column distillation is sent into the 4th destilling tower through spiral, has the resistance to of refractory material using inside block High temperature airduct introduces the waste heat of part of cement kiln dore furnace at the 4th destilling tower lower height 1/3 ~ 1/5, the technique ginseng of waste heat Number is：870 ~ 880 DEG C of temperature, 10000 ~ 30000m of air quantity3/ h, reaction time are 1.5 ~ 3.5h；
Material after the 4th distillation column distillation is sent into the 5th destilling tower through spiral, has the resistance to of refractory material using inside block High temperature airduct introduces the waste heat of part of cement kiln kiln tail smoke-box at the 5th destilling tower lower height 1/3 ~ 1/5, the technique of waste heat Parameter is：1000 ~ 1100 DEG C of temperature, air quantity are 10000 ~ 30000m3/ h, reaction time are 1.5 ~ 3.5h；
E, mixing material：The material after distillation column distillation by 5 series connection of distilling apparatus is sent into cement grinding mill, is produced as mixing material Cement.
Further, spent acid and salkali waste according to the mol ratio of acid group and cation are 1 in step A:1 pours into soda acid respectively And storehouse, the addition of abraum salt are the 30% ~ 50% of spent acid and salkali waste gross mass.
Further, acid-base neutralization storehouse is cylindrical, a diameter of 3m, high 3.6m.
Further, neutral blends material is pumped into by pretreatment unit using the pump of 2 30 ~ 60 meters of lifts in step B.
Further, the fountain height of alcohol is 10 ~ 20kg/h in step C.
Further, tower diameter is 1.5 ~ 1.8m in step D, and high 3 ~ 5m, the height of gravel layer is distillation tower height 1/6, the height of quartz sand layer is the 1/6 of distillation tower height, and the gauze of one layer of 10 cm thick of paving, material bed at the top of quartz sand Height be the 1/3 ~ 1/2 of distillation tower height, be provided with air-introduced machine at the top of steam collecting layer.
Further, the material after the distillation column distillation in step E by 5 series connection of distilling apparatus is in cement raw material Addition is 3% ~ 5%.
Beneficial effects of the present invention：
The present invention burns the high concentrated acid alkali wasteliquid with certain calorific value using cement kiln high-temperature section, while produces cement, solves The problem of danger wastes, the rate of destroying by fire reach more than 99.99%, realize the harm for reducing hazardous waste to environment.
Invention is described in detail with reference to the accompanying drawings and examples.
Brief description of the drawings
Fig. 1 is present invention process flow chart；
Fig. 2 is destilling tower hierarchy schematic diagram.
Embodiment
Embodiment 1
As shown in figure 1, a kind of method using cement kiln synergic processing acid-base waste fluid and abraum salt, comprises the following steps：
A, waste liquid mixes：Spent acid is poured into acid-base neutralization storehouse with salkali waste to be neutralized, and adds abraum salt, obtains neutral blends Material；Agitating device and pH, liquid level, time detection device are provided with acid-base neutralization storehouse, mixing speed is 120 ~ 240r/h.Its Middle spent acid is 1 according to the mol ratio of acid group and cation with salkali waste:1 pours into acid-base neutralization storehouse respectively；After adding soda acid mixing The abraum salt of gross mass 30% ~ 50%, neutralize storehouse has agitating device for cylinder, a diameter of 3m, high 3.6m, inside, and agitating device is Blade stirring device, blade rotating speed are 120 ~ 240r/h（Turn/hour）；Realized by the detection of the instrument such as pH, liquid level, time automatic Change operation.
B, pump：The neutral blends material that step A is obtained is pumped into by pretreatment dress using the pump of 2 30 ~ 60 meters of lifts Put, pump output is controlled in 1 ~ 2t/h；Pretreatment unit is the stainless steel stove of disc, and top is provided with latticed sprayer unit, periphery There is electronic ignition device.
C, pre-process：The depth of neutral blends material in pretreatment unit is set to keep 0.5 ~ 1.0m, using pvc pipe by wine Essence sprays into the sprayer unit on pretreatment unit top, persistently sprays into alcohol, and alcohol is technical grade, and fountain height is 10 ~ 20kg/h, spray Lighted a fire while mist, keep 30 ~ 60min of burning, the flue gas after burning enters cement plant dangerous waste gas handling system.This is through step Effect be combustion using alcohol, the organic matter in mixture is burned completely.
D, distill：Distilling apparatus is pumped into by pretreated neutral blends material；The distilling apparatus is by 5 series connection Destilling tower composition, the destilling tower top be cylinder, and bottom is taper, setting many levels inside destilling tower（Fig. 2）, by Under supreme be followed successively by gravel layer, quartz sand layer, gauze, material bed and steam collecting layer；Tower diameter is 1.5 ~ 1.8m, high by 3 ~ 5m, the height of gravel layer are the 1/6 of distillation tower height, and the height of quartz sand layer is the 1/6 of distillation tower height, are spread at the top of quartz sand The gauze of one layer of 10 cm thick, material bed height are the 1/3 ~ 1/2 of distillation tower height, are provided with and draw at the top of steam collecting layer Blower fan.The effect of gravel is to promote non-volatile salt to be diverted into and prevent salinity from rising in the presence of heating with capillary, quartz The effect of sand and gauze is to promote the distilling period salinity to volatilize under heating state.
There is the high temperature resistant airduct of refractory material that the waste heat of part of cement kiln grate-cooler high temperature section is introduced into the using internal block At one destilling tower lower height 1/3 ~ 1/5, the technological parameter of waste heat is：760 ~ 780 DEG C of temperature, 10000 ~ 30000m of air quantity3/ H, reaction time are 1.5 ~ 3.5h；This temperature section main purpose is to distill potassium chloride.
Material after the first distillation column distillation is sent into after-fractionating tower through spiral, has refractory material using inside block High temperature resistant airduct the waste heat of part of cement kiln fourth stage preheater is introduced at after-fractionating tower lower height 1/3 ~ 1/5, it is remaining Heat technological parameter be：800 ~ 810 DEG C of temperature, 10000 ~ 30000m of air quantity3/ h, reaction time are 1.5 ~ 3.5h；This temperature section Main purpose is to distill sodium chloride.
Material after after-fractionating column distillation is sent into the 3rd destilling tower through spiral, has refractory material using inside block High temperature resistant airduct the waste heat of part of cement kiln level V preheater is introduced at the 3rd destilling tower lower height 1/3 ~ 1/5, it is remaining Heat technological parameter be：850 ~ 860 DEG C of temperature, 10000 ~ 30000m of air quantity3/ h, reaction time are 1.5 ~ 3.5h；This temperature section Main purpose is to distill sodium sulphate.
Material after the 3rd distillation column distillation is sent into the 4th destilling tower through spiral, has refractory material using inside block High temperature resistant airduct the waste heat of part of cement kiln dore furnace is introduced at the 4th destilling tower lower height 1/3 ~ 1/5, the work of waste heat Skill parameter is：870 ~ 880 DEG C of temperature, 10000 ~ 30000m of air quantity3/ h, reaction time are 1.5 ~ 3.5h；The main mesh of this temperature section Be to distill potassium carbonate.
Material after the 4th distillation column distillation is sent into the 5th destilling tower through spiral, has refractory material using inside block High temperature resistant airduct the waste heat of part of cement kiln kiln tail smoke-box is introduced at the 5th destilling tower lower height 1/3 ~ 1/5, waste heat Technological parameter is：1000 ~ 1100 DEG C of temperature, air quantity are 10000 ~ 30000m3/ h, reaction time are 1.5 ~ 3.5h；This temperature section Main purpose is to distill potassium sulfate.
Still-process is completed in distilling apparatus.
E, mixing material：The material (salt) after distillation column distillation by 5 series connection of distilling apparatus is sent into cement grinding mill, as mixed Material production cement is closed, addition is 3% ~ 5%.
The source of the salkali waste be industrial chemical manufacture, chemical analysis and test, the derusting of metal and other products and Cleaning, wastewater treatment, textile printing and dyeing pre-treatment, spent lye caused by paper industry.
The source of spent acid is acid pickle caused by petroleum refining process and sour mud；Sulfuric acid sulfurous acid, hydrochloric acid, hydrofluoric acid, phosphorus Caused acid pickle, solid peracid and acid sludge in acid and phosphorous acid, the production of nitric acid and nitrous acid, process for preparation；Metallic article essence Caused useless acid wash liquid in process；In electronic components fabrication electrolytic degreasing, acid etching, the preceding surface of activation are carried out with acid solution Acid pickle caused by sensitization, catalysis, tin leaching are bright；Use acid pickle caused by acid cleaning, carbonization, acidifying, burn into passivation；And Caused failure, rotten, unqualified, superseded, of poor quality highly acid scouring powder, cleaning during other producing and selling and use Agent, the acid pickle of stain remover, solid peracid and acid sludge.
The source of abraum salt is caused mixture during sewage disposal, waste water and gas acid-base neutralization and chemical industry synthesis.
Embodiment 2
The present embodiment is the optimization that design parameter is carried out on the basis of embodiment 1.
Spent acid is 1 according to the mol ratio of acid group and cation with salkali waste:1 pours into acid-base neutralization storehouse respectively, add 30% it is useless Salt, storehouse is neutralized as cylinder, a diameter of 3 meters, high 3.6 meters, there is agitating device inside, and agitating device is blade, and blade rotating speed is 120 turns/hour；Automatic operating is realized by the detection of the instrument such as pH, liquid level, time.Using the pump of 2 30 meters of lifts by soda acid The mixture of waste liquid and abraum salt after neutralization is pumped into pretreatment unit, and pump output is controlled in 1t/h；By the waste liquid after acid-base neutralization And the mixture of abraum salt is pumped into pretreatment unit, 0.8 meter of thickness is kept in pretreatment unit.Pretreatment unit is disc Latticed sprayer unit is arranged at stainless steel stove, top, and there is electronic ignition device on periphery.Alcohol is sprayed into by pretreatment dress using pvc pipe The sprayer unit on top is put, persistently sprays into alcohol.Alcohol is technical grade, and fountain height is 10 kgs/hr, spraying while point Fire, keep burning 30 minutes.Flue gas after burning enters cement plant dangerous waste gas handling system.By the waste drains pump after acid-base neutralization Enter distilling apparatus.Distilling apparatus different workshop section of connecting according to salt-mixture difference after acid-base neutralization, is generally divided into five sections of series connection. The waste heat of part of cement kiln grate-cooler high temperature section is introduced the first destilling tower by the high temperature resistant airduct for having refractory material using internal block At bottom 1/3.The technological parameter of waste heat is：Temperature is 760 degree, and air quantity is 10000 m3/h.Distillation is completed in distilling apparatus Process, reaction time are 1.5 hours.Material by first paragraph distillation is sent into after-fractionating tower through spiral.Built using inside The high temperature resistant airduct for having refractory material introduces the waste heat of part of cement kiln fourth stage preheater at after-fractionating tower bottom 1/3. The technological parameter of waste heat is：Temperature is 800 degree, and air quantity is 10000 m3/h.Still-process is completed in distilling apparatus, is reacted Time is 1.5 hours.By the material of after-fractionating tower the 3rd destilling tower will be sent into through spiral.There is refractory material using inside block High temperature resistant airduct the waste heat of part of cement kiln level V preheater is introduced at the 3rd destilling tower bottom 1/3.The technique of waste heat Parameter is：Temperature is 850 degree, air quantity 10000m3/h.Still-process is completed in distilling apparatus, the reaction time is 1.5 small When.This temperature section main purpose is to distill sodium sulphate.The material by the 3rd section of distillation is sent into the 4th through spiral to steam Evaporate tower.The high temperature resistant airduct for having refractory material using internal block introduces the waste heat of part of cement kiln dore furnace under the 4th destilling tower At portion 1/3.The technological parameter of waste heat is：Temperature is 870 degree, and air quantity is 10000 m3/h.Complete to distill in distilling apparatus Journey, reaction time are 1.5 hours.Material by the 4th section of distillation is sent into the 5th destilling tower through spiral.Had using inside block The high temperature resistant airduct of refractory material introduces the waste heat of part of cement kiln kiln tail smoke-box at the 5th destilling tower bottom 1/3.Waste heat Technological parameter is：Temperature is 1000 degree, air quantity 10000m3/h.Still-process is completed in distilling apparatus, the reaction time is 1.5 hour.Salt after five sections of distillations is sent into cement grinding mill, is used as mixing material.Addition is 3%.
Embodiment 3
The present embodiment is the optimization that design parameter is carried out on the basis of embodiment 1.
Spent acid is 1 according to the mol ratio of acid group and cation with salkali waste:1 pours into acid-base neutralization storehouse respectively, add 50% it is useless Salt, storehouse is neutralized as cylinder, a diameter of 3 meters, high 3.6 meters, there is agitating device inside, and agitating device is blade, and blade rotating speed is 240 turns/hour；Automatic operating is realized by the detection of the instrument such as pH, liquid level, time.Using the pump of 2 60 meters of lifts by soda acid The mixture of waste liquid and abraum salt after neutralization is pumped into pretreatment unit, and pump output is controlled in 2t/h；By the waste liquid after acid-base neutralization And the mixture of abraum salt is pumped into pretreatment unit, 1.0 meters of thickness is kept in pretreatment unit.Pretreatment unit is disc Latticed sprayer unit is arranged at stainless steel stove, top, and there is electronic ignition device on periphery.Alcohol is sprayed into by pretreatment dress using pvc pipe The sprayer unit on top is put, persistently sprays into alcohol.Alcohol is technical grade, and fountain height is 20 kgs/hr, spraying while point Fire, keep burning 60 minutes.Flue gas after burning enters cement plant dangerous waste gas handling system.By the waste drains pump after acid-base neutralization Enter distilling apparatus.Distilling apparatus different workshop section of connecting according to salt-mixture difference after acid-base neutralization, is generally divided into five sections of series connection. The waste heat of part of cement kiln grate-cooler high temperature section is introduced the first destilling tower by the high temperature resistant airduct for having refractory material using internal block At bottom 1/4.The technological parameter of waste heat is：Temperature is 780 degree, air quantity 15000m3/h.Complete to distill in distilling apparatus Journey, reaction time are 2 hours.Material by first paragraph distillation is sent into after-fractionating tower through spiral.Had using inside block resistance to The high temperature resistant airduct of fiery material introduces the waste heat of part of cement kiln fourth stage preheater at after-fractionating tower bottom 1/4.Waste heat Technological parameter be：Temperature is 810 degree, air quantity 15000m3/h.Still-process, reaction time 2 are completed in distilling apparatus Hour.Material by second segment distillation is sent into the 3rd destilling tower through spiral.There is the high temperature resistant of refractory material using internal block Airduct introduces the waste heat of part of cement kiln level V preheater at the 3rd destilling tower bottom 1/4.The technological parameter of waste heat is：Temperature Spend for 860 degree, air quantity 15000m3/h.Still-process is completed in distilling apparatus, the reaction time is 2 hours.The 3rd will be passed through The material of section distillation is sent into the 4th destilling tower through spiral.There is the high temperature resistant airduct of refractory material by part of cement kiln using internal block The waste heat of dore furnace is introduced at the 4th destilling tower bottom 1/4.The technological parameter of waste heat is：Temperature is 880 degree, and air quantity is 15000m3/h.Still-process is completed in distilling apparatus, the reaction time is 2 hours.By the material by the 4th section of distillation through spiral shell The 5th destilling tower is sent into rotation.The high temperature resistant airduct for having refractory material using internal block draws the waste heat of part of cement kiln kiln tail smoke-box Enter the 5th destilling tower to put at bottom 1/4.The technological parameter of waste heat is：Temperature is 1100 degree, air quantity 15000m3/h.Distilling Still-process is completed in device, the reaction time is 2 hours.This salt passed through after five sections of distillations is sent into cement grinding mill, as mixing Material uses.Addition is 3.5%.

Claims (7)

  1. A kind of 1. method using cement kiln synergic processing acid-base waste fluid and abraum salt, it is characterised in that：Comprise the following steps：
    A, waste liquid mixes：Spent acid is poured into acid-base neutralization storehouse with salkali waste to be neutralized, and adds abraum salt, after obtaining acid-base neutralization Waste liquid and abraum salt mixture, i.e. neutral blends material；Agitating device and pH, liquid level, time are provided with acid-base neutralization storehouse Detection means, mixing speed are 120 ~ 240r/h；
    B, pump：Neutral blends material is pumped into pretreatment unit, pump output is controlled in 1 ~ 2t/h；Pretreatment unit is disk The stainless steel stove of shape, top are provided with latticed sprayer unit, and there is electronic ignition device on periphery；
    C, pre-process：The depth of neutral blends material in pretreatment unit is set to keep 0.5 ~ 1.0m；Alcohol is sprayed into pretreatment dress The sprayer unit in top set portion, persistently sprays into alcohol, lights a fire while spraying, keeps 30 ~ 60min of burning；Flue gas after burning enters Enter cement plant dangerous waste gas handling system；
    D, distill：Distilling apparatus is pumped into by pretreated neutral blends material；The distilling apparatus is by 5 steamings connected Evaporate tower composition, the destilling tower top be cylinder, and bottom is taper, setting many levels inside destilling tower, from the bottom to top according to Secondary is gravel layer, quartz sand layer, gauze, material bed and steam collecting layer；The neutral blends material is arranged on material bed；
    The waste heat of part of cement kiln grate-cooler high temperature section is introduced first and steamed by the high temperature resistant airduct for having refractory material using internal block Evaporate at tower lower height 1/3 ~ 1/5, the technological parameter of waste heat is：760 ~ 780 DEG C of temperature, 10000 ~ 30000m of air quantity3/ h, instead It is 1.5 ~ 3.5h between seasonable；
    Material after the first distillation column distillation is sent into after-fractionating tower through spiral, has the resistance to of refractory material using inside block High temperature airduct introduces the waste heat of part of cement kiln fourth stage preheater at after-fractionating tower lower height 1/3 ~ 1/5, waste heat Technological parameter is：800 ~ 810 DEG C of temperature, 10000 ~ 30000m of air quantity3/ h, reaction time are 1.5 ~ 3.5h；
    Material after after-fractionating column distillation is sent into the 3rd destilling tower through spiral, has the resistance to of refractory material using inside block High temperature airduct introduces the waste heat of part of cement kiln level V preheater at the 3rd destilling tower lower height 1/3 ~ 1/5, waste heat Technological parameter is：850 ~ 860 DEG C of temperature, 10000 ~ 30000m of air quantity3/ h, reaction time are 1.5 ~ 3.5h；
    Material after the 3rd distillation column distillation is sent into the 4th destilling tower through spiral, has the resistance to of refractory material using inside block High temperature airduct introduces the waste heat of part of cement kiln dore furnace at the 4th destilling tower lower height 1/3 ~ 1/5, the technique ginseng of waste heat Number is：870 ~ 880 DEG C of temperature, 10000 ~ 30000m of air quantity3/ h, reaction time are 1.5 ~ 3.5h；
    Material after the 4th distillation column distillation is sent into the 5th destilling tower through spiral, has the resistance to of refractory material using inside block High temperature airduct introduces the waste heat of part of cement kiln kiln tail smoke-box at the 5th destilling tower lower height 1/3 ~ 1/5, the technique of waste heat Parameter is：1000 ~ 1100 DEG C of temperature, air quantity are 10000 ~ 30000m3/ h, reaction time are 1.5 ~ 3.5h；
    E, mixing material：The material after distillation column distillation by 5 series connection of distilling apparatus is sent into cement grinding mill, is produced as mixing material Cement.
  2. 2. the method according to claim 1 using cement kiln synergic processing acid-base waste fluid and abraum salt, it is characterised in that：Step Spent acid is 1 according to the mol ratio of acid group and cation with salkali waste in rapid A:1 pours into acid-base neutralization storehouse respectively, and the addition of abraum salt is The 30% ~ 50% of spent acid and salkali waste gross mass.
  3. 3. the method according to claim 1 using cement kiln synergic processing acid-base waste fluid and abraum salt, it is characterised in that：Acid In alkali and storehouse is cylindrical, a diameter of 3m, high 3.6m.
  4. 4. the method according to claim 1 using cement kiln synergic processing acid-base waste fluid and abraum salt, it is characterised in that：Step Neutral blends material is pumped into by pretreatment unit using the pump of 2 30 ~ 60 meters of lifts in rapid B.
  5. 5. the method according to claim 1 using cement kiln synergic processing acid-base waste fluid and abraum salt, it is characterised in that：Step The fountain height of alcohol is 10 ~ 20kg/h in rapid C.
  6. 6. the method according to claim 1 using cement kiln synergic processing acid-base waste fluid and abraum salt, it is characterised in that：Step Tower diameter is 1.5 ~ 1.8m in rapid D, and high 3 ~ 5m, the height of gravel layer is the 1/6 of distillation tower height, the height of quartz sand layer For the 1/6 of distillation tower height, the gauze of one layer of 10 cm thick of paving at the top of quartz sand, material bed height is distillation tower height 1/3 ~ 1/2, steam collecting layer top is provided with air-introduced machine.
  7. 7. the method according to claim 1 using cement kiln synergic processing acid-base waste fluid and abraum salt, it is characterised in that：Step Addition of the material after distillation column distillation in cement raw material in rapid E by 5 series connection of distilling apparatus is 3% ~ 5%.
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