CN106871131B - For handling the device and method of industrial dangerous waste sodium sulfate salt slag and resource utilization - Google Patents

For handling the device and method of industrial dangerous waste sodium sulfate salt slag and resource utilization Download PDF

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Publication number
CN106871131B
CN106871131B CN201710051847.6A CN201710051847A CN106871131B CN 106871131 B CN106871131 B CN 106871131B CN 201710051847 A CN201710051847 A CN 201710051847A CN 106871131 B CN106871131 B CN 106871131B
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China
Prior art keywords
air
rotary kiln
incinerator
sodium sulfate
type rotary
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CN201710051847.6A
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CN106871131A (en
Inventor
朱国庆
孟祥龙
郝继宗
江礼春
朱庆伟
王文鹏
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Yangzhou Jianyuan Biotechnology Co Ltd
711th Research Institute of CSIC
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Yangzhou Jianyuan Biotechnology Co Ltd
711th Research Institute of CSIC
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/04Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/028Multi-chamber type furnaces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/40Arrangements of controlling or monitoring devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02Cooling
    • F27D15/0206Cooling with means to convey the charge

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Furnace Details (AREA)

Abstract

This application discloses the device and method for handling industrial dangerous waste sodium sulfate salt slag and resource utilization, which includes incinerator, jacket type rotary kiln, calcining furnace, air preheating system, exhaust treatment system, feeding system and cooling packing system;The incinerator is separately connected jacket type rotary kiln and exhaust treatment system by pipeline, the feeding system connects the jacket type rotary kiln, the jacket type rotary kiln is separately connected calcining furnace and connects incinerator with air preheating system, the air preheating system, and the calcining furnace connects cooling packing system;The jacket type rotary kiln includes outer barrel and inner cylinder, kiln hood and kiln tail, the outer barrel is used for the high-temperature flue gas being sent by incinerator that circulates, the inner cylinder is used for the salt slag being sent by feeding system that circulates, and the kiln hood is used for feeding and waste air, and the kiln tail is for discharging.Have the advantages that processing is thorough, process equipment is simple, cost of investment is small, the residence time is short, high production efficiency using equipment of the invention.

Description

For handling the device and method of industrial dangerous waste sodium sulfate salt slag and resource utilization
Technical field
The present disclosure relates generally to the processing methods of industrial by-product hazardous waste, and in particular to for handling industrial dangerous waste sulfuric acid The device and method of sodium salt slag and resource utilization.
Background technique
The largely by-product Waste Sulfuric Acid sodium containing poisonous and harmful substances such as organic matter, tar is generated in many chemical production process Salt slag, such as production phenol-acetone, formic acid, vitamin C device end can generate a large amount of sodium sulfate salt slags, which is put into state Family's Hazardous Waste List.With the development of many important fine chemistry industries and intermediate product, which constantly increases. And since to contain the poisonous and harmful substances such as organic matter tar, moisture content high, easy to harden for it, and cannot be directly as the raw material of industry It using, and its disposition is difficult, somewhat expensive, many enterprises use warehouse stockpiling, outdoor placement or directly place to rivers and other places, Swell-warehouse is caused to occupy a large amount of soils or destroy soil, deteriorate water quality, pollution environment, the living environment and body and mind to people around are strong Kang Zaocheng grave danger has seriously affected the development of national environmental protection cause.Therefore how Low investment, low cost harmlessness disposing Dangerous waste sodium sulfate salt slag and can efficiently high yield by its resource utilization, become industry significant problem urgently to be solved.
At present to the processing method of chemical production process by-product sodium sulfate salt slag substantially there are three types of: 1. desalinization of soil by flooding or leaching method: by abraum salt Slag is washed with solvent, removes the toxic and harmful substance in desalination slag as far as possible, and the method scope of application is small, cost of investment is high, washes Wash solvent can generate secondary pollution and processing waste effect be not thorough.2. high-temperature process method: by abraum salt it is single using rotary kiln, The Thermal Equipments such as fluidized bed furnace carry out 800 DEG C or more high-temperature calcination processing, divide the organic matter objectionable impurities in abraum salt at high temperature Solution is oxidized to gaseous component.This method is insoluble be sodium sulfate salt slag at 600 DEG C or more as temperature increases, occur extremely strong Caking property, and melting, ring formation, the severe phenomenon such as agglomeration occur when being higher than salt fusing point, cause rotary kiln or boil furnace apparatus without Method operates normally, it is difficult to realize industrialization.3. molten state facture: by Thermal Equipment by salt slag be heated to 884 DEG C of fusing point with On, in the case where molten state, thermally decompose oxidation processes organic matter objectionable impurities.This method has equipment investment high, and technique is multiple The disadvantages of miscellaneous.4. middle low-temperature treatment method: this method handles sodium sulfate salt slag by 600 DEG C of pyrolysis ovens below, general to stop Time was at 4~10 hours.Organic matter objectionable impurities is thermally decomposed into volatile tail gas and is detached from solid salt under middle low temperature condition, reaches Harmless treatment, and the solid component after decomposing remains in solid salt surface, it is more difficult to produce pure white sodium sulfate crystal.The processing Process is slow, and when industrialized production has the shortcomings that big cost of investment, low efficiency, yield are small.
Summary of the invention
In view of drawbacks described above in the prior art or deficiency, it is intended to provide a kind of industrial dangerous waste sulphur of efficient harmless processing The method of acid sodium-salt slag and resource utilization.
The embodiment of the present invention provides a kind of equipment for handling industrial dangerous waste sodium sulfate salt slag and resource utilization, including Incinerator, jacket type rotary kiln, calcining furnace, air preheating system, exhaust treatment system, feeding system and cooling packing system;
The incinerator is separately connected jacket type rotary kiln and exhaust treatment system, the feeding system connection by pipeline The jacket type rotary kiln, the jacket type rotary kiln are separately connected calcining furnace and air preheating system, the air preheat system System connection incinerator, the calcining furnace connect cooling packing system;
The jacket type rotary kiln includes outer barrel and inner cylinder, kiln hood and kiln tail, the outer barrel for circulate by The high-temperature flue gas that incinerator is sent into, the inner cylinder are used for the salt slag being sent by feeding system that circulates, and the kiln hood is used for feeding And waste air, the kiln tail is for discharging.
The incinerator includes sequentially connected buner system, insulated combustion chamber, temperature adjustment section;
The buner system includes combustion gas surge tank, burning valve group, combustion air fan and burner;The combustion gas buffering Tank connects burner by burning valve group, and the combustion air fan is separately connected burning valve group and burner, the burner connection Insulated combustion chamber.
The calcining furnace includes uniform distribution mechanism, continuous feeding and discharging device, bringing-up section, soaking zone, cooling section and blanking Bucket;
Uniform distribution mechanism, bringing-up section, soaking zone and cooling are successively arranged above the continuous feeding and discharging device side Section, the continuous feeding and discharging device other side are equipped with lower hopper.
The air preheating system includes air preheater, air blower, air-introduced machine and chimney;
The air blower connects the air preheater, and the air preheater is separately connected air-introduced machine and adiabatic combustion Room, the air-introduced machine connect the chimney.
Stainless steel cylinder is equipped in the bringing-up section of the calcining furnace and the burner hearth of soaking zone;The cooling section uses water-cooled jacket Structure is cooled down, and the water-cooled jacket is connected with the stainless steel cylinder of soaking zone;
Three groups of gas pipelines, respectively compressed air hose group, logical nitrogen tube group, pumping flue gas leading are inscribed in the stainless steel cylinder Group;Separate valve is arranged in the road the compressed air hose Zu Mei, for adjusting each road according to oxygen consuming amount difference before and after calcination process Ventilatory capacity;A valve is arranged in the logical nitrogen tube group on main pipe rail;Separate valve is arranged in the pumping road flue gas leading Zu Mei, uses According to exhaust gas yield difference before and after calcination process, each road suction power is adjusted.
The exhaust treatment system includes that rotary kiln exhaust gas fan, calciner emission blower, the first deduster and second remove Dirt device;
First deduster one end connection kiln hood, the other end connection rotary kiln exhaust gas fan, described second Deduster one end connects the bringing-up section, and the other end connects the calciner emission blower;
The rotary kiln exhaust gas fan connects insulated combustion chamber with the calciner emission blower and pipeline.
Hot-air after the air preheater preheating divides two-way to connect incinerator, connects insulated combustion chamber all the way for exhaust gas It burns and uses oxygen, perforation connection temperature adjustment section is for adjusting incinerator exit gas temperature all the way.
The feeding system includes crusher, the first bucket elevator, feeding bin and screw(-type) feeder;
The crusher is arranged in first bucket elevator side, and feeding bin is arranged in the other side, and the feeding bin bottom is equipped with Screw(-type) feeder, described screw(-type) feeder one end are protruded into the inner cylinder.
The cooling packing system includes cooling equipment, bucket elevator, packaging feed bin and packing machine;
The upper end of the cooling equipment is equipped with the lower hopper, and the cooling equipment side is equipped with the second bucket elevator, described Second bucket elevator connection packaging feed bin, the packaging feed bin lower end is equipped with packing machine.
The present invention also provides a kind of sides that industrial dangerous waste sodium sulfate salt slag and resource utilization are handled using above-mentioned equipment Method, comprising the following steps:
(1) sodium sulfate salt slag is sent into the inner cylinder of jacket type rotary kiln by feeding system, it is organic through dry and part After object volatilization cracking, sodium sulfate salt slag is sent into calcining furnace, and the Tail Gas that jacket type rotary kiln generates passes through exhaust treatment system It is sent into incinerator;
(2) high-temperature flue gas of Tail Gas high-temperature calcination in incinerator, generation is arrived in incinerator tail portion through hot wind temperature adjustment Preset temperature, then it is passed through the outer barrel of jacket type rotary kiln, the gas for being passed through outer barrel is sent into air preheating system through heat exchange and is used Carry out preheated air, preheated air is re-fed into incinerator, and the exhaust gas after reducing temperature is emptied by chimney;
(3) feeding bin for entering calcining furnace from the sodium sulfate salt slag that jacket type rotary kiln comes out, will through uniform distribution mechanism Sodium sulfate salt slag is uniformly laid on continuous feeding and discharging device, then heated section, soaking zone, cooling section and lower hopper, is being calcined Pernicious gas and sodium sulfate crystal are generated in furnace, the sodium sulfate crystal is sent into cooling packing system through lower hopper and is packed; The pernicious gas is sent into incinerator high-temperature calcination harmless treatment by exhaust treatment system.
In the step (1): jacket type rotary kiln controlled at 250~350 DEG C, sodium sulfate salt slag is returned in jacket type 5~10min is stopped in rotary kiln;The fire box temperature of insulated combustion chamber is 1000 DEG C or more;
In the step (2): the preset temperature is 600~800 DEG C;The flue gas cools to 300 through outer barrel heat exchange Air preheating system is sent into after~400 DEG C;
In the step (3): sodium sulfate salt slag layer thickness is 1cm~3.5cm, and stone width is 0.5m~1.5m;Institute Bringing-up section and soaking zone setting are stated controlled at 785~850 DEG C, sodium sulfate salt slag stops 15 in bringing-up section and soaking zone altogether~ 60min;Temperature after cooling section cools down is 300 DEG C or less.Cooling equipment through cooling packing system cools to 50 DEG C Below.
The present invention is high using the equipment such as incinerator, jacket type rotary kiln, the special calcining furnace for being applicable in sodium sulfate salt slag composition Imitate harmless treatment and comprehensive resource and utilize system process, solve existing high-temperature process method due to salt slag elevated temperature cohesiveness and Equipment is unable to the problem of normal use, and comparison desalinization of soil by flooding or leaching method, molten state facture, middle low-temperature treatment method, which have, handles thorough, technique The advantages of equipment is simple, cost of investment is small, the residence time is short, high production efficiency.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other Feature, objects and advantages will become more apparent upon:
A kind of Fig. 1 method for handling industrial dangerous waste sodium sulfate salt slag and resource utilization provided in an embodiment of the present invention Flow diagram.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that in order to Convenient for description, part relevant to invention is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Referring to FIG. 1, a kind of equipment for handling industrial dangerous waste sodium sulfate salt slag and resource utilization, including incinerator 1, jacket type rotary kiln 2, calcining furnace 3, air preheating system 4, exhaust treatment system 5, feeding system 6 and cooling packing system 7;
Incinerator 1 is separately connected jacket type rotary kiln 2 and exhaust treatment system 5 by pipeline, and feeding system 6 connects collet Formula rotary kiln 2, jacket type rotary kiln 2 are separately connected calcining furnace 3 and air preheating system 4, and air preheating system 4 connects incinerator 1, calcining furnace 3 connects cooling packing system 7;
Jacket type rotary kiln 2 includes outer barrel and inner cylinder, kiln hood and kiln tail, and the outer barrel is for circulating by incinerator 1 high-temperature flue gas being sent into, the inner cylinder are used for feeding and row for the salt slag being sent by feeding system 6 that circulates, the kiln hood Exhaust gas, the kiln tail is for discharging.
The present invention has the advantages that high efficiency, low energy consumption, residence time be short, high production capacity.
On the basis of the above embodiments, incinerator 1 includes sequentially connected buner system 11, insulation combustion to the present embodiment Burn room 12, temperature adjustment section 13;
Buner system 11 includes combustion gas surge tank 111, burning valve group 112, combustion air fan 113 and burner 114;Combustion gas Surge tank 111 connects burner 114 by burning valve group 112, and combustion air fan 113 is separately connected burning valve group 112 and burner 114, burner 114 connects insulated combustion chamber 12.
Fuel used in buner system of the invention is factory for purification dry gas or device in Gas, and fuel is through surge tank 111 The burning valve group 112 of access control combustion process afterwards provides First air by combustion air fan 113, generates and holds through the igniting of burner 114 Continuous thermal-flame.Combustion gas sustained combustion in 12 fire box temperature of insulated combustion chamber up to 1000 DEG C or more, with guarantee by exhaust-gas treatment system The exhaust gas harmless treatment that system 5 is sent into is thorough.The hot-air being sent into simultaneously by air preheating system 4 is for insulated combustion chamber 12 Oxygen.In temperature adjustment section 13, it is passed through preheated air temperature adjustment, preheated air is the hot-air after air preheating system 4 exchanges heat, by incinerator After exit gas temperature is adjusted to 600~800 DEG C, jacket type rotary kiln 2 is accessed by pipeline.
Since sodium sulfate salt slag moisture content is big, easily agglomeration, difficult stone, and organic matter, tar in part of sulfuric acid sodium salt slag Equal impurity contents are high, and open fire over-emitting black exhaust is played on salt surface when direct high-temperature calcination, cause the fusing of Yan Zha localized hyperthermia to generate difficult Fusant, therefore need jacket type rotary kiln be dried and partial organic substances volatilization processing, then enter back into calcining furnace depth Purification.In jacket type rotary kiln 2, by jacket type counterflow heat exchange, flue gas cools to 300 through the heat exchange of jacket type rotary kiln 2~ 400 DEG C, be sent into air preheating system 4, salt slag jacket type rotary kiln 2 be dried and partial organic substances volatilization processing 5min~ The pernicious gas of 10min, generation are sent into 1 high-temperature calcination harmless treatment of incinerator by exhaust treatment system 5.It is pretreated The calcining furnace 3 that salt slag is sent by screw conveyor.
On the basis of the above embodiments, calcining furnace 3 includes uniform distribution mechanism 31, continuous feeding and discharging device to the present embodiment 32, bringing-up section 33, soaking zone 34, cooling section 35 and lower hopper 36;
Uniform distribution mechanism 31, bringing-up section 33,34 and of soaking zone are successively arranged above 32 side of continuous feeding and discharging device Cooling section 35,32 other side of continuous feeding and discharging device are equipped with lower hopper 36.
By the volatilization cracking carbonization of the impurity such as organic matter harmful substance in bringing-up section high-temperature calcination salt slag and in high temperature The lower even slight burning of quickly oxidation, generates gaseous component and is detached from solid salt, generate pernicious gas and sodium sulfate crystal, harmful tail Gas is sent into 1 high-temperature calcination harmless treatment of incinerator by exhaust treatment system 5, and the sodium sulphate of high temperature is cooled to through cooling section 35 300 DEG C hereinafter, enter cooling packing system 7 by lower hopper 36.
Preferably, stainless steel cylinder is equipped in the burner hearth of the bringing-up section 33 of calcining furnace 3 and soaking zone 34;Cooling section 35 uses Water cooling nested structure is cooled down, and water-cooled jacket is connected with the stainless steel cylinder of soaking zone;
Three groups of gas pipelines, respectively uniformly distributed compressed air hose group, uniformly distributed logical nitrogen is inscribed in the stainless steel cylinder Pipe group, uniformly distributed pumping flue gas leading group;Separate valve is arranged in the road the compressed air hose Zu Mei, for according to before and after calcination process Oxygen consuming amount is different, adjusts each road ventilatory capacity, reaches best calcination processing effect;The logical nitrogen tube group is arranged one on main pipe rail Valve, reply when the impurity contents such as organic matter are excessively high in sodium sulfate salt slag cause to have obvious flare in cylinder when, rapidly put out a fire;Institute It states and takes out the road flue gas leading Zu Mei setting separate valve, for adjusting each road pumping according to exhaust gas yield difference before and after calcination process Power.
The heating method of calcining furnace of the present invention is electric heating, and input and output material mode is the continuous feed that head goes out into tail, calcining furnace Three sections for the treatment of process point: bringing-up section, soaking zone, cooling section.The bringing-up section: salt slag is gradually heated to 785 by charging low temperature ~850 DEG C, which cracks carbonization with the volatilization of the impurity such as organic matter;The soaking zone: in height after organic cracking carbonization Under temperature, quickly the even slight burning of oxidation is final generates gas component and solid salt separation;The bringing-up section and soaking zone, burner hearth Interior setting is suitable for the stainless steel rectangular cylinder of high-temperature expansion sliding, which can effectively avoid sodium sulfate salt slag calcination processing mistake The incident salt slag of journey falls off, the influence of localized hyperthermia's fusing, acidic and alkaline gas corrosion etc. to calcining furnace heating properties and service life. The cooling section is cooled down using water cooling nested structure, and water-cooled jacket is connected with soaking zone cylinder, viscous to avoid sodium sulfate salt high temperature Knot property, the pure water cooled set of sodium sulphate is cooled to 300 DEG C hereinafter, can normal blanking after calcining.The water-cooled jacket, after cooling down salt Hot water, in clean-in-place calcining furnace convey sodium sulfate salt slag equipment etc..The burner hearth and stainless steel cylinder sealing are wanted It asks high, avoids fire door from importing and exporting hollow gas and cause thermal loss, extend the residence time, reduce production yields.
The present embodiment on the basis of the above embodiments, air preheating system 4 include air preheater 41, air blower 42, Air-introduced machine 43 and chimney 44;
Air blower 42 connects the air preheater 41, and air preheater 41 is separately connected air-introduced machine 43 and insulated combustion chamber 12, air-introduced machine 43 connects chimney 44.
It is circulated by the flue gas that jacket type rotary kiln 2 is sent into from 41 fume side of air preheater, the sky blasted by air blower 42 Gas circulates from air side, and reducing through heat exchange flue-gas temperature is suitable for the temperature discharged, and is discharged into chimney 44, cold air by air-introduced machine 43 It is heated to be insulated combustion chamber 12 and temperature adjustment section 13 that hot-air is sent into incinerator 1, the arrangement of air preheater 41 had both provided useless Gas, which burns, uses oxygen, and improves energy utilization rate, has saved fuel.
On the basis of the above embodiments, exhaust treatment system 5 includes rotary kiln exhaust gas fan 51, calcining furnace to the present embodiment Exhaust gas fan 52, the first deduster 53 and the second deduster 54;
First deduster, 53 one end connects the kiln hood, and the other end connects rotary kiln exhaust gas fan 51, the second deduster 54 One end connects bringing-up section 33, and the other end connects calciner emission blower 52;
Rotary kiln exhaust gas fan 51 connects insulated combustion chamber 12 by pipeline with calciner emission blower 52.
The Tail Gas being discharged when dry pretreatment salt slag in jacket type rotary kiln 2 passes through the first deduster 53 and rotary kiln Incinerator 1 is sent into after exhaust gas fan 51, the Tail Gas that 3 high-temperature calcination salt slag depth of calcining furnace generates when purifying is removed by second Dirt device 54 and calciner emission blower 52 are sent into incinerator 1, and Tail Gas reaches innoxious in 12 high-temperature calcination of insulated combustion chamber The purpose of processing.Pretreatment exhaust pipe that the present invention is drawn from the inner cylinder of jacket type rotary kiln 2, by calcining furnace stainless steel cylinder The depth calcining purification exhaust pipe that body is drawn, the two-way exhaust gas penetrate through access adiabatic combustion all after deduster, by pipeline Room 12, simplifies piping connection.
On the basis of the above embodiments, the hot-air after air preheater 41 preheats divides two-way connection to burn to the present embodiment Furnace 1 connects insulated combustion chamber 12 for burned waste gas oxygen all the way, and perforation connection temperature adjustment section 13 goes out for adjusting incinerator 1 all the way Mouth flue-gas temperature.
On the basis of the above embodiments, feeding system 6 includes crusher 61, the first bucket elevator 62, feeding to the present embodiment Storehouse 63 and screw(-type) feeder 64;
The crusher 61 is arranged in first bucket elevator, 62 side, and feeding bin 63 is arranged in the other side, and 63 bottom of feeding bin is equipped with Screw(-type) feeder 64,64 one end of screw(-type) feeder are protruded into the inner cylinder.
Industrial dangerous waste sodium sulfate salt slag not only contains the toxic and harmful substances such as organic matter, tar, but also contains with moisture Amount height, hardened physical characteristic of easily agglomerating, it is therefore necessary to be promoted to after crusher 61 is broken, then through the first bucket elevator 62 Feeding bin 63, screw(-type) feeder 64 pre-process salt slag from bin bottom precession jacket type rotary kiln 2.The present invention is designing It fully takes into account that salt slag humidity is big, natural blanking is difficult, susceptible to plugging problem when feeding system, guarantees the normal work of feeding system Make.The arrangement of feeding bin 63 ensure that the intermittence of broken feeding and the continuity of screw feeder.
On the basis of the above embodiments, cooling packing system 7 includes cooling equipment 71, bucket elevator 72, packet to the present embodiment Charging hopper 73 and packing machine 74;
The upper end of cooling equipment 71 is equipped with lower hopper 36, and cooling 71 side of equipment is equipped with the second bucket elevator 72, and the second bucket mentions The connection packaging feed bin 73 of machine 72, packaging 73 lower end of feed bin is equipped with packing machine 74.
The sodium sulphate product come out from the lower hopper 36 of calcining furnace 3 at 300 DEG C hereinafter, through cooling equipment 71 cool to 50 DEG C are arrived packaging feed bin 73 hereinafter, the second bucket elevator 72 through being linked in sequence is promoted, and are packaged machine 74 from packaging 73 blanking of feed bin It is packaged into bag sale.The arrangement of packaging feed bin 73 ensure that the continuity of sodium sulphate product discharge and the intermittence of packing work.
The present invention also provides a kind of sides that industrial dangerous waste sodium sulfate salt slag and resource utilization are handled using above-mentioned equipment Method, which comprises the following steps:
(1) sodium sulfate salt slag is sent into the inner cylinder of jacket type rotary kiln by feeding system, it is organic through dry and part After object volatilization cracking, sodium sulfate salt slag is sent into calcining furnace, and the Tail Gas that jacket type rotary kiln generates passes through exhaust treatment system It is sent into incinerator;
(2) high-temperature flue gas of Tail Gas high-temperature calcination in incinerator, generation is arrived in incinerator tail portion through hot wind temperature adjustment Preset temperature, then it is passed through the outer barrel of jacket type rotary kiln, the gas for being passed through outer barrel is sent into air preheating system through heat exchange and is used Carry out preheated air, preheated air is re-fed into incinerator, and the exhaust gas after reducing temperature is emptied by chimney;
(3) feeding bin for entering calcining furnace from the sodium sulfate salt slag that jacket type rotary kiln comes out, will through uniform distribution mechanism Sodium sulfate salt slag is uniformly laid on continuous feeding and discharging device, then heated section, soaking zone, cooling section and lower hopper, is being calcined Pernicious gas and sodium sulfate crystal are generated in furnace, the sodium sulfate crystal is sent into cooling packing system through lower hopper and is packed; The pernicious gas is sent into incinerator high-temperature calcination harmless treatment by exhaust treatment system.
Preferably, in the step (1): jacket type rotary kiln controlled at 250~350 DEG C, sodium sulfate salt slag exists 5~10min is stopped in jacket type rotary kiln;
In the step (2): the preset temperature is 600~800 DEG C;The flue gas cools to 300 through outer barrel heat exchange Air preheating system is sent into after~400 DEG C;
In the step (3): sodium sulfate salt slag layer thickness is 1cm~3.5cm, and stone width is 0.5m~1.5m;Institute Bringing-up section 33 and the setting of soaking zone 34 are stated controlled at 785~850 DEG C, sodium sulfate salt slag stops altogether in bringing-up section and soaking zone 15~60min;Temperature after the cooling of cooling section 35 is 300 DEG C or less.The cooling drop of cooling equipment 71 through cooling packing system Temperature is to 50 DEG C or less.
Sodium sulfate salt slag is stopped 5~10min by jacket type rotary kiln by the present invention at a temperature of 250~350 DEG C, is carried out After dry and partial organic substances harmful substance volatilization processing, layer thickness 1cm~3.5cm, paving are realized by uniform distribution mechanism Expect width 0.5m~1.5m, is continuously introduced into speciality and is applicable in the calcining furnace of sodium sulfate salt slag, stopped at a temperature of 785~850 DEG C 15~60min, the objectionable impurities such as organic matter in sodium sulfate salt slag crack under carbonization and the condition of high temperature quickly after high-temperature calcination The even slight burning of oxidation, generates gas component and is detached from solid salt, form pure white sodium sulfate crystal.The pure white sulphur of high temperature state Sour sodium crystal is cooled to 300 DEG C hereinafter, cooling to 50 DEG C or less into packaging into efficient cooling equipment again through the cooling section of calcining furnace System is packaged into bag sale.
The high-temperature flue gas that incinerator of the present invention generates cools to 600~800 DEG C by temperature adjustment section and introduces collet by pipeline Formula rotary kiln is pre-processed for salt slag and is used, and 300~400 DEG C of flue gases of rotary furnace discharge introduce air preheater preheating by temperature adjustment Air for incinerator insulated combustion chamber oxygen and temperature adjustment section hot-air, arranged by air-introduced machine by the flue gas being discharged from air preheater Enter chimney, so far reach reduction exhaust gas temperature, improves the purpose of energy utilization rate.
The product that dangerous waste sodium sulfate salt slag of the invention is purified through harmless treatment and depth is pure white sodium sulfate crystal, It is analyzed through product composition, index at least conforms to the Group III Grade A in " GB/T6009-2003 industrial anhydrous sodium sulfate ", even Meet II class qualified product regulation.It can be used for the raw materials of industry such as inorganic salts or for industry such as glass, dyestuff, papermaking, reach comprehensive Close the purpose of resource utilization.
Below by the processing method of an actual production, to illustrate the effect handled using device and method of the invention Fruit:
The harmless treatment and resource utilization of sodium sulfate salt slag are generated after production phenol-acetone:
Phenol-acetone device produces brine waste and generates sodium sulfate salt slag through triple effect evaporation, according to the operation of triple effect evaporation system Situation, the harmful substance contents difference such as organic matter tar is big in the sodium sulfate salt slag of generation, and color is brownish black, yellowish-brown, shallow Yellow, lightpink etc., and moisture content is big, it is easy to harden difficult.
Using equipment of the invention, salt slag is pre-processed through feeding system into jacket type rotary kiln, drying and volatilizing etc. generates Tail gas be sent into incinerator high-temperature calcination harmless treatment, the salt slag of generation is carbonarius, is sent by Shaftless screw conveyor The uniform distribution mechanism of calcining furnace passes through continuous feeding and discharging device according to thickness 1cm~3.5cm, width 0.5~1.5m stone Bringing-up section and soaking zone by the salt slag completed by 800 DEG C of calcining furnace, stop 25min, organic matter in salt slag after high-temperature calcination Equal cracking carbonization simultaneously quickly aoxidizes even slight burning at high temperature, and tail gas is sent into incinerator harmless treatment, and salt slag becomes pure White sodium sulfate crystal, through cooling section cool to 300 DEG C hereinafter, using cooling equipment water cooling shell type helix cooling to 50 DEG C with Under, and be packaged into bag through cooling packing system and sell.Product is detected its COD (COD, Chemical Oxygen Demand) value decreases below 150ppm by 5700~50000ppm, and treated salt belongs to Group III through determination of acute toxicity, Acute oral LD50 is 2900~10000mg/kg, is percutaneously LD50 > 2000mg/kg, for less toxic chemicals, reaches innoxious place The purpose of reason.It is analyzed through product composition, index meets the rule of the II class qualified product in " GB/T6009-2003 industrial anhydrous sodium sulfate " It is fixed.
Merely by salt slag by brownish black, yellowish-brown, light yellow, lightpink calcination processing at meeting GB/T6009-2003's Pure white sodium sulfate crystal, wherein the special calcining electric furnace running average power for being applicable in sodium sulfate salt slag of a set of 300kw is 230kw, average product 12t/d.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein Can technical characteristic replaced mutually and the technical solution that is formed.

Claims (10)

1. a kind of equipment for handling industrial dangerous waste sodium sulfate salt slag and resource utilization, which is characterized in that including incinerator, Jacket type rotary kiln, calcining furnace, air preheating system, exhaust treatment system, feeding system and cooling packing system;
The incinerator is separately connected jacket type rotary kiln and exhaust treatment system by pipeline, described in the feeding system connection Jacket type rotary kiln, the jacket type rotary kiln is separately connected calcining furnace and air preheating system, the air preheating system connect Incinerator is connect, the calcining furnace connects cooling packing system;
The jacket type rotary kiln includes outer barrel and inner cylinder, kiln hood and kiln tail, and the outer barrel is for circulating by burning The high-temperature flue gas that furnace is sent into, the inner cylinder are used for the salt slag being sent by feeding system that circulates, and the kiln hood is used for feeding and row Exhaust gas, the kiln tail is for discharging.
2. equipment according to claim 1, which is characterized in that the incinerator include sequentially connected buner system, Insulated combustion chamber, temperature adjustment section;
The buner system includes combustion gas surge tank, burning valve group, combustion air fan and burner;The combustion gas surge tank is logical Burning valve group connection burner is crossed, the combustion air fan is separately connected burning valve group and burner, the burner connection insulation Combustion chamber.
3. equipment according to claim 2, which is characterized in that the calcining furnace includes uniform distribution mechanism, is back to back Expect device, bringing-up section, soaking zone, cooling section and lower hopper;
Uniform distribution mechanism, bringing-up section, soaking zone and cooling section, institute are successively arranged above the continuous feeding and discharging device side The continuous feeding and discharging device other side is stated equipped with lower hopper.
4. equipment according to claim 3, which is characterized in that set in the bringing-up section of the calcining furnace and the burner hearth of soaking zone There is stainless steel cylinder;The cooling section is cooled down using water cooling nested structure, the stainless steel cylinder of the water-cooled jacket and soaking zone Connection;
Three groups of gas pipelines, respectively compressed air hose group, logical nitrogen tube group, pumping flue gas leading group are inscribed in the stainless steel cylinder; Separate valve is arranged in the road the compressed air hose Zu Mei, for it is logical to adjust each road according to oxygen consuming amount difference before and after calcination process Tolerance;A valve is arranged in the logical nitrogen tube group on main pipe rail;Separate valve is arranged in the pumping road flue gas leading Zu Mei, is used for It is different according to exhaust gas yield before and after calcination process, adjust each road suction power.
5. equipment according to claim 3, which is characterized in that the air preheating system includes air preheater, air blast Machine, air-introduced machine and chimney;
The air blower connects the air preheater, and the air preheater is separately connected air-introduced machine and insulated combustion chamber, institute It states air-introduced machine and connects the chimney;
The exhaust treatment system includes rotary kiln exhaust gas fan, calciner emission blower, the first deduster and the second deduster;
First deduster one end connects the kiln hood, and the other end connects the rotary kiln exhaust gas fan, second dedusting Device one end connects the bringing-up section, and the other end connects the calciner emission blower;
The rotary kiln exhaust gas fan connects insulated combustion chamber with the calciner emission blower and pipeline.
6. equipment according to claim 5, which is characterized in that the hot-air after the air preheater preheating divides two-way to connect Incinerator is connect, connects insulated combustion chamber all the way for burned waste gas oxygen, perforation connection temperature adjustment section goes out for adjusting incinerator all the way Mouth flue-gas temperature.
7. according to the described in any item equipment of claim 2-6, which is characterized in that the feeding system includes crusher, first Bucket elevator, feeding bin and screw(-type) feeder;
The crusher is arranged in first bucket elevator side, and feeding bin is arranged in the other side, and the feeding bin bottom is equipped with spiral Batcher, described screw(-type) feeder one end are protruded into the inner cylinder.
8. equipment according to claim 3 or 4, which is characterized in that the cooling packing system includes cooling equipment, struggling against mentions Machine, packaging feed bin and packing machine;
The upper end of the cooling equipment be equipped with the lower hopper, the cooling equipment side be equipped with the second bucket elevator, described second Bucket elevator connection packaging feed bin, the packaging feed bin lower end is equipped with packing machine.
9. a kind of handle industrial dangerous waste sodium sulfate salt slag and resource utilization using the described in any item equipment of claim 2-8 Method, which comprises the following steps:
(1) sodium sulfate salt slag is sent into the inner cylinder of jacket type rotary kiln by feeding system, is waved through dry and partial organic substances After shattered crack solution, sodium sulfate salt slag is sent into calcining furnace, and the Tail Gas that jacket type rotary kiln generates is sent by exhaust treatment system Incinerator;
(2) Tail Gas high-temperature calcination in incinerator, the high-temperature flue gas of generation is in incinerator tail portion through hot wind temperature adjustment to default Temperature, then it is passed through the outer barrel of jacket type rotary kiln, the gas for being passed through outer barrel is sent into air preheating system through heat exchange and is used in advance Hot-air, preheated air are re-fed into incinerator, and the exhaust gas after reducing temperature is emptied by chimney;
(3) enter the feeding bin of calcining furnace from the sodium sulfate salt slag that jacket type rotary kiln comes out, through uniform distribution mechanism by sulfuric acid Sodium salt slag is uniformly laid on continuous feeding and discharging device, then heated section, soaking zone, cooling section and lower hopper, in calcining furnace Pernicious gas and sodium sulfate crystal are generated, the sodium sulfate crystal is sent into cooling packing system through lower hopper and is packed;It is described Pernicious gas is sent into incinerator high-temperature calcination harmless treatment by exhaust treatment system.
10. according to the method described in claim 9, it is characterized by:
In the step (1): jacket type rotary kiln controlled at 250~350 DEG C, sodium sulfate salt slag is in jacket type rotary kiln 5~10min of interior stop;The fire box temperature of insulated combustion chamber is 1000 DEG C or more;
In the step (2): the preset temperature is 600~800 DEG C;
The flue gas is sent into air preheating system after outer barrel heat exchange cools to 300~400 DEG C;
In the step (3): sodium sulfate salt slag layer thickness is 1cm~3.5cm, and stone width is 0.5m~1.5m;It is described to add Hot arc and soaking zone setting controlled at 785~850 DEG C, sodium sulfate salt slag stops 15 in bringing-up section and soaking zone altogether~ 60min;Temperature after cooling section cools down is 300 DEG C or less;Cooling equipment through cooling packing system cools to 50 DEG C Below.
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