CN108383402A - A kind of disposal of ash and slag technique and its system - Google Patents
A kind of disposal of ash and slag technique and its system Download PDFInfo
- Publication number
- CN108383402A CN108383402A CN201810435236.6A CN201810435236A CN108383402A CN 108383402 A CN108383402 A CN 108383402A CN 201810435236 A CN201810435236 A CN 201810435236A CN 108383402 A CN108383402 A CN 108383402A
- Authority
- CN
- China
- Prior art keywords
- ash
- lime
- disposal
- gas
- plant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention discloses a kind of disposal of ash and slag technique and its systems, include drawing-in device and with its sequentially connected melting plant, Volatile Gas disposal plant and lye preparation facilities, the other end of the melting plant connects afterheat generating system, lime-ash enters melting plant in drawing-in device after material mixes, molten is heated in melting plant, the gas generated enters Volatile Gas disposal plant；Solid sodium hydroxide is modulated into sodium hydroxide solution in lye preparation facilities, spray into Volatile Gas disposal plant, sodium hydroxide in liquid is reacted with the sour gas in Volatile Gas disposal plant generates sodium salt, and remaining volatile hazardous substances participate in the firing of clinker；The vapor that melting plant generates enters afterheat generating system and organic working medium circulating generation, the lime-ash of molten condition is pushed to be used as construction material to be discharged after cooling, to realize the harmless treatment of lime-ash, avoid the various cumbersome techniques needed for cement collaborative processes.
Description
Technical field
The invention belongs to solidification disposal of waste field more particularly to a kind of disposal of ash and slag system and its disposing techniques.
Background technology
In castoff burning processing procedure generated flying dust and clinker (hereinafter referred to as lime-ash) containing a large amount of dioxin,
The harmful substances such as heavy metal, such as unprocessed direct emission, it will contaminated soil and underground water cause to endanger with environment and the mankind
Evil.Domestic disposal of ash and slag method relatively common at present has chemical agent stabilization technology, melting heat treatment technics and cement kiln
Cooperative disposal technology.
Chemical agent stabilization technology refers to that by chemical reaction, so that poisonous and harmful substance is converted into low using chemical agent
The process of dissolubility, low migration and hypotoxicity substance, to handle based on heavy metal waste, but Dui bioxin and dissolving salt are without bright
Aobvious effect, and the medicaments such as macromolecule intercalating agent price is high, causes cost excessively high.Great amount of soluble salt will quickly turn in lime-ash
It moves on in percolate, percolate is made to become difficult to the percolate with high salt of processing, it is extremely difficult to handle, seriously endanger underground water and soil.
Also, landfill disposal needs to occupy a large amount of soil.Lime-ash has the volume increase-volume close to 2 times in chelating solidification process, according to
10 meters of calculating of buried depth, need about 6000 mu of land occupation every year.With the rapid development of urban construction, the increase of city function,
Town site is more and more nervous, can not expand landfill Facilities Construction land used.According to live build portion《Domestic garbage incineration flyash is solid
Change stabilizing surface treatment standard》, at least 1400 yuan or more of cost of lime-ash chelating solidification (not comprising soil and landfill yard construction at
Originally), and future also needs to after-treatment landfill material.
It refers to being heated to lime-ash using fuel or electric power in melting furnace to melt heat treatment technics
Thermal decomposition, burning and gasification occur for 1400 DEG C or more high temperature, the organic pollutions such as flying dust Zhong bioxin, and inorganic matter is then
Melting forms vitreous slag, and heavy metal element is wrapped in the glassy state network of sintered molten in flying dust, effectively a control huge sum of money
Belong to and leaching.However contain the volatile heavy metal elements such as a large amount of chlorine, sulphur and lead cadmium, processing in the secondary flue gas of technology generation
Difficulty is big, and cost is high.
Cement kiln synergic processing technology is that lime-ash is sent into cement kiln in some way, utilizes 1600 DEG C of high temperature of cement kiln
Gas burns, and to thoroughly eliminate the organic pollutions such as bioxin, heavy metal is consolidated and is fused in clinker lattice, realize harmless
Change, minimizing processing.The dore furnace absorption of cement kiln, the absorption of Pyatyi preheater, conditioning Tower, cogeneration, bag collection etc. are more
Grade fume treatment measure ensures that flue gas emission is up to standard.Currently used dosing method is added after direct spray sums it up wet concentration.Directly
It refers to that lime-ash is injected directly into clinker production system from positions such as kiln hood, kiln tail smoke-box, dore furnaces that spray, which adds,.But in lime-ash
Chlorine sulphur influences the production process of clinker greatly, the Coating clogging of production system to be easy to cause, to influence production run.
It refers to being separated to the potassium sodium villaumite in lime-ash using washing means that wet concentration, which adds, and the lime-ash after desalination is sent into cement
Kiln, desalted water recycle after processing and evaporation.But it needs to expend many energy after lime-ash washing and it is dried, most
End form participates in clinker burning at dry mash；Contain a large amount of heavy metal inside desalted water, it need to separately be disposed.
Invention content
For overcome the deficiencies in the prior art, the present invention provide one kind can reduce discharge of poisonous waste, technical process it is simple,
The disposal of ash and slag system of energy regenerating.
To achieve the above object, the present invention uses following technical scheme：
A kind of disposal of ash and slag technique, includes the following steps：
1) pending lime-ash mixes in drawing-in device with additive, into melting plant；
2) lime-ash is heated to molten by melting plant, wherein the gas generated enters Volatile Gas disposal plant；
3) there is the alkaline solution prepared in lye preparation facilities, alkaline solution is delivered to Volatile Gas disposition dress by liquid pump
In setting；
4) escaping gas and alkaline solution occur chemical reaction and generate salting liquid, and by qualified discharge after gas demisting；
5) salting liquid is delivered to crystallization in lye preparation facilities by liquid pump and precipitates.
Preferably, the lime-ash of molten condition is collected after cooling as construction material, cold in the step 2)
But a large amount of water vapour is generated during and enters afterheat generating system, and heat is provided for afterheat generating system.
Preferably, the escaping gas in the step 4) after chilling eliminates most of salinity, contains volatility on a small quantity
The escaping gas of heavy metal harmful substance is extracted out by air-introduced machine, into cement kiln, participates in the firing of clinker.
Preferably, the alkaline solution is sodium hydroxide solution, a concentration of 5-50%.
Preferably, in step 2), the melting time is 1-6 hours, and temperature 1000-1500 degree, pressure is normal pressure.
The present invention also provides a kind of disposal of ash and slag system, includes drawing-in device and filled with its sequentially connected melting
It sets, Volatile Gas disposal plant and lye preparation facilities, the drawing-in device are used to mix pending lime-ash and additive；
Described melting plant one end is connected with drawing-in device, and lime-ash and additive mixture are heated to molten condition, the other end with
Afterheat generating system connection is generated electricity with heat supply；The Volatile Gas disposal plant is connected with melting plant and lye preparation facilities respectively
It is logical, alkaline solution prefabricated in the escaping gas generated in melting plant and lye preparation facilities is imported into Volatile Gas disposition and is filled
Qualified discharge after reacting demisting is mutually mixed in setting.
Preferably, the Volatile Gas disposal plant include spray column and with its sequentially connected air-introduced machine, several valves,
Scrubbing tower and cement kiln, and the ventilation terminal inside scrubbing tower and the deentrainment tower above scrubbing tower, melting plant production
Raw escaping gas enters the spray column and scrubbing tower is chemically reacted with aqueous slkali, and the air-introduced machine extraction is containing volatilization
Property harmful substance gas enter the firing that cement kiln participates in clinker, valve control escaping gas flows to cement
Escaping gas is blasted scrubbing tower by kiln or scrubbing tower, the ventilation terminal, the deentrainment tower by after washing gas demisting and row
It puts.
Preferably, the lye preparation facilities includes storage tank, ration feeding machine, blender, crystallization pond and prepares pond, institute
Storage tank connection ration feeding machine is stated, the blender, which is set to, to be prepared in pond, and salting liquid crystallization in crystallization pond precipitates and will be extra
Salting liquid flow into prepare pond, the ration feeding machine will in storage tank by the solid base for having determined weight be delivered to preparation pond in, Gu
Body alkali forms aqueous slkali by blender stirring and dissolving.
Preferably, the drawing-in device includes toter, several warehouses, ration feeding machine and several conveyers, institute
It states warehouse to connect with conveyer, the toter carries lime-ash and additive to warehouse, and the warehouse stores lime-ash and adds
Charging, the ration feeding machine will be sent after lime-ash and additive measuring fixed amount into conveyer, and the conveyer is by lime-ash and adds
Charging mixes and is delivered to melting plant.The toter includes electric block and tank car, and the additive includes broken
Glass, silica, calcium oxide, aluminium oxide etc., specific material need to determine that the warehouse includes according to the specific ingredient of lime-ash
Lime-ash warehouse and additive warehouse, the conveyer are screw conveyor.
Preferably, the melting plant includes entrance, outlet, exhaust outlet, high temperature smelting furnace, heating electrode and chilling row
Slag device, the entrance are set to the upper end of high temperature smelting furnace, and the heating electrode is set to the both sides of high temperature smelting furnace, chilling deslagging
Device is set to the rear end of outlet, and the exhaust outlet is set to the upper right side of high temperature smelting furnace, and lime-ash enters in high temperature smelting furnace, heats
Heated by electrodes lime-ash, the lime-ash of the outlet output molten condition, chilling slag-draining device cool down lime-ash, and the exhaust outlet will melt
When the volatilization gas that generates be expelled in spray column.
Preferably, the Volatile Gas disposal plant and lye preparation facilities are equipped with 4 liquid pumps, the spray column, scrubbing tower
Be respectively equipped with 1 to 2 liquid pump behind pond with preparing, and for by liquid be delivered in crystallization pond from spray column and scrubbing tower and/
Or it is delivered in spray column and scrubbing tower from pond is prepared.
Preferably, the afterheat generating system includes condenser and power generator connected to it, in the condenser
Equipped with organic working medium, organic working medium heat absorption becomes gaseous state and enters power generator acting power generation, and the condenser is by water vapour
Condense into liquid.
Preferably, the valve includes the first valve and the second valve, and when carrying out cement kiln work, the second valve closes
It closes, the first valve is opened, and volatilization gas enters cement kiln from the first valve；When cement kiln breaks down, the first valve is closed,
Second valve is opened, and escaping gas is blasted in the sodium hydroxide solution in scrubbing tower through ventilation terminal and thoroughly washed, volatility gas
The harmful substances such as remaining chlorine, sulphur, heavy metal are all reacted with sodium hydroxide in body, are formed sediment and are entered in solution, and with
Sodium hydroxide solution is by the crystallization pond of liquid pump blowback lye preparation facilities, and crystallization precipitates in crystallization pond.
Compared with prior art, the beneficial effects of the present invention are：
1, lime-ash is disposed using fusion technology, is directly realized by the harmless treatment of lime-ash, avoids needed for cement collaborative processes
Various cumbersome techniques.
2, using electric power as the energy of high-temperature fusion, a large amount of secondary flue gas because being generated when fuel combustion are avoided, are reduced
Flue gas disposition amount.
3, chlorine and sulphur in high-temperature fusion device secondary flue gas are removed using lye, chlorine sulphur component is avoided to enter clinker
Production system influences production run.
4, secondary flue gas is disposed using cement coordination technique, is generated when former high-temperature fusion device being avoided to dispose secondary flue gas
Great number cost.
5, ORC (organic working medium) generation technology is introduced, the water vapour generated when water quenching is condensed, avoids steam from escaping, simultaneously
The energy in water vapour is recycled, electric energy is converted into.
6, alkali liquid washing facility is increased as spare flue gas processing device.When manufacture of cement goes wrong and shuts down,
Secondary flue gas introduce alkali liquid washing facility, it is washed after qualified discharge, ensure high-temperature fusion device energy continuous service without because
It is shut down for cement production system.
Description of the drawings
Fig. 1 is a kind of flow chart of disposal of ash and slag technique of the present invention；
Fig. 2 is a kind of structural schematic diagram of disposal of ash and slag system of the present invention.
In Fig. 2,10 be drawing-in device, and 101 be toter, and 1021 be lime-ash warehouse, and 1022 be additive warehouse, 103
For ration feeding machine, 104 be conveyer, and 20 be melting plant, and 201 be high temperature smelting furnace, and 202 be heating electrode, 203 be into
Mouthful, 204 for outlet, 205 be exhaust outlet, and 206 be chilling slag-draining device, and 30 be afterheat generating system, and 301 be condenser, 302
For power generator, 40 be lye preparation facilities, and 401 be crystallization pond, and 402 be storage tank, and 403 is prepare pond, and 404 be blender, 50
It is spray column for Volatile Gas disposal plant, 501,502 be air-introduced machine, and 503 be the first valve, and 504 be the second valve, and 505 be water
Stall head-shield, 506 be cement rotary kiln, and 507 be ventilation terminal, and 508 be washer, and 509 be demister, and 60 be liquid pump.
Specific implementation mode
Technical scheme of the present invention is described in detail below in conjunction with attached drawing and specific embodiment.
As shown in Figure 1, a kind of disposal of ash and slag technique provided by the invention, includes the following steps：
1) it is mixed with additive in drawing-in device 10 through pending lime-ash, into melting plant 20；
2) lime-ash is heated to molten by melting plant 20, wherein the gas generated enters Volatile Gas disposal plant 50；
3) there is the alkaline solution prepared in lye preparation facilities 40, alkaline solution is delivered at Volatile Gas by liquid pump 60
It sets in device 50；
4) escaping gas and alkaline solution occur chemical reaction and generate salting liquid, and by qualified discharge after gas demisting；
5) salting liquid is delivered to crystallization in lye preparation facilities 40 by liquid pump 60 and precipitates.
The lime-ash requirement for entering melting furnace in the step 1) is powdery, if lime-ash is in granular form, then needs to crush
Pretreatment, additive dosage are the 0-30% of total amount of feeding.
The lime-ash of molten condition is collected after cooling as construction material in the step 2), in cooling process
The middle a large amount of water vapour of generation enters afterheat generating system 30, and heat is provided for afterheat generating system 30.The temperature of the water vapour
100-105 DEG C of degree.
Escaping gas in the step 4) after chilling eliminates most of salinity, has on a small quantity containing volatile heavy metal
The escaping gas of evil substance is extracted out by air-introduced machine 502, into cement kiln, participates in the firing of clinker.Volatile heavy metal
It is mercury, cadmium, lead, arsenic, nickel etc., escaping gas removes salt and is divided into alkali, chlorine, sulphur；Gas demisting standard is《HJ.T176-2005 endangers
Dangerous waste centralized burning handling project construction technique specification》.
The alkaline solution is sodium hydroxide solution, a concentration of 5-50%.
In step 2), the melting time is 1-6 hours, and temperature 1000-1500 degree, pressure is normal pressure.
The present invention also provides a kind of disposal of ash and slag system, includes drawing-in device 10 and filled with its sequentially connected melting
20, Volatile Gas disposal plant 50 and lye preparation facilities 40 are set, the drawing-in device 10 is used for pending lime-ash and addition
Material mixes；20 one end of the melting plant is connected with drawing-in device 10, and lime-ash and additive mixture are heated to melting
State, the other end are connected to afterheat generating system 30 and are generated electricity with heat supply；The Volatile Gas disposal plant 50 is respectively and melting plant
20 and lye preparation facilities 40 be connected, will be pre- in the escaping gas generated in melting plant 20 and lye preparation facilities 40
It is mutually mixed qualified discharge after reaction demisting in the alkaline solution importing Volatile Gas disposal plant 50 of system.
If the Volatile Gas disposal plant 50 include spray column 501 and with its sequentially connected air-introduced machine 502, dryvalve
Door, scrubbing tower 508 and cement kiln, and the ventilation terminal 507 inside scrubbing tower 508 and removing above scrubbing tower 508
Mist tower 509, the escaping gas that melting plant 20 generates enter the spray column 501 and scrubbing tower 508 and aqueous slkali
Reaction is learned, the air-introduced machine 502 extracts the gas containing volatile hazardous substances out and enters the firing that cement kiln participates in clinker,
The valve control escaping gas flows to cement kiln or scrubbing tower 508, and the ventilation terminal 507, which blasts escaping gas, to be washed
Wash tower 508, the deentrainment tower 509 by after washing gas demisting and discharge.The cement kiln includes 505 He of cement kiln head-shield
Cement rotary kiln 506.
The lye preparation facilities 40 includes storage tank 402, ration feeding machine 103, blender 404, crystallization pond 401 and system
Standby pond 403, the storage tank 402 connect ration feeding machine 103, and the blender 404, which is set to, to be prepared 403 in pond, and salting liquid is being analysed
Crystallization, which precipitates and flows into extra salting liquid, in brilliant pond 401 prepares pond 403, and the ration feeding machine 103 will be pressed in storage tank 402
The solid base for having determined weight is delivered in preparation pond 403, and solid base forms aqueous slkali by 404 stirring and dissolving of blender.
The drawing-in device 10 includes toter 101, several warehouses 102, ration feeding machine 103 and several conveyings
Machine 104, the warehouse 102 are connect with conveyer 104, and the toter 101 carries lime-ash and additive to warehouse 102, institute
It states warehouse 102 and stores lime-ash and additive, the ration feeding machine 103 will be sent to conveying after lime-ash and additive measuring fixed amount
On machine 104, lime-ash and additive are mixed and are delivered to melting plant 20 by the conveyer 104.The toter 101 includes
It includes cullet, silica, calcium oxide, aluminium oxide etc. to have electric block and tank car, the additive, and specific material needs root
Determine that the warehouse 102 includes lime-ash warehouse 1021 and additive warehouse 1022, the conveyer according to the specific ingredient of lime-ash
104 be screw conveyor.
The melting plant 20 includes entrance 203, outlet 204, exhaust outlet 205, high temperature smelting furnace 201, heating electrode
202 and chilling slag-draining device 206, the entrance 203 is set to the upper end of high temperature smelting furnace 201, and the heating electrode 202 is set to high
The both sides of warm melting furnace 201, chilling slag-draining device 206 are set to the rear end of outlet, and the exhaust outlet 205 is set to high temperature smelting furnace
201 upper right side, lime-ash enter in high temperature smelting furnace 201, and heating electrode 202 heats lime-ash, 204 output molten of the outlet
The lime-ash of state, chilling slag-draining device 206 cool down lime-ash, and the volatilization gas generated when melting is expelled to spray by the exhaust outlet 205
It drenches in tower 501.
The Volatile Gas disposal plant 50 and lye preparation facilities 40 are equipped with 4 liquid pumps 60, the spray column 501, washing
It is respectively equipped with 1 to 2 liquid pump 60 behind tower 508 and preparation pond 403, and for liquid is defeated from spray column 501 and scrubbing tower 508
It send in crystallization pond 401 and/or from pond 403 is prepared and is delivered in spray column 501 and scrubbing tower 508.
The afterheat generating system 30 includes condenser 301 and power generator connected to it 302, the condenser
Organic working medium is equipped in 301, the organic working medium heat absorption becomes gaseous state and enters the acting power generation of power generator 302, the condenser
301 by water recovery at liquid.
The valve includes the first valve 503 and the second valve 504, when carrying out cement kiln work, the second valve 504
It closes, the first valve 503 is opened, and escaping gas enters cement kiln head-shield 505 through the first valve 503, and cold from cement kiln
But the high temperature Secondary Air mixing of machine participates in the firing of clinker into cement rotary kiln 506, plays cement cooperative disposal effect
It answers；When cement kiln breaks down, the first valve 503 is closed, and the second valve 504 is opened, and escaping gas is through ventilation terminal 507
It blasts and is thoroughly washed in the sodium hydroxide solution in scrubbing tower 508, remaining chlorine, sulphur, heavy metal etc. are harmful in escaping gas
Substance is all reacted with sodium hydroxide, is formed sediment and is entered in solution, and with sodium hydroxide solution by 60 blowback lye of liquid pump
The crystallization pond 401 of preparation facilities 40, crystallization precipitates in crystallization pond 401.
Embodiment 1
The processing step of disposal of ash and slag is as follows：
1) pretreated lime-ash is sent into warehouse by toter 101, and the additive purchased in the market is sent into another
Warehouse, lime-ash and additive enter conveyer 104 after the metering of ration feeding machine 103 and mix, and are sent into melting plant 20；
2) heating electrode 202 heats lime-ash and additive to molten condition, and the lime-ash of molten condition reaches chilling through outlet
Device 206, ash collection after cooling get up as construction material, are generated during cooling more than a large amount of water vapour entrance
Heat generating system 30 provides heat for afterheat generating system 30, after water vapour heat exchange, condenses into flow and returns chilling dress
Set 206；
3) water vapour provides heat to the organic working medium in condenser 301, becomes gaseous state after organic working medium heat absorption, from condensation
Device 301 enters power generator 302, pushes the acting power generation of power generator 302, the electric power of generation is used to melting plant 20, is had
Liquid is condensed into after the cooling of machine working medium and returns to condenser 301, forms organic working medium circulation；
4) sodium hydrate solid is housed, sodium hydrate solid is through ration feeding machine 103 in the storage tank of lye preparation facilities 40
Input prepares pond 403 after metering, and blender 404 accelerates the solution rate of sodium hydroxide, it is ensured that and sodium hydroxide solution is uniform and stable,
After preparing sodium hydroxide solution, sodium hydroxide liquid is sprayed into spray column 501 and scrubbing tower 508, caustic lye of soda by liquid pump 60
Body absorbs the harmful substances such as chlorine and sulphur in Volatile Gas, forms sodium salt；
5) lime-ash adds thermogenetic escaping gas to discharge the spray column of escaping gas disposal system 50 from exhaust outlet
In 501, high-temperature volatile gas is contacted with sodium hydroxide liquid, rapid cooling, avoids the synthesis again of dioxin.In chilling mistake
Cheng Zhong, the sodium hydroxide in solution are reacted with the acidic materials (chlorine, sulphur etc.) in Volatile Gas, form sodium salt (sodium chloride, sodium sulphate
Deng), sodium salt enters in sodium hydroxide solution, with sodium hydroxide solution by the crystallization pond of 60 blowback lye preparation facilities 40 of liquid pump
401, crystallization precipitates in crystallization pond 401；
6) escaping gas after chilling eliminates most of salinity, but still contains the nuisances such as a small amount of volatile heavy metal
Matter, the escaping gas are extracted out by air-introduced machine 502, and the second valve 504 is closed, and the first valve 503 is opened, and escaping gas is through the
One valve 503 enters cement kiln head-shield 505, is mixed with the high temperature Secondary Air from cement kiln cooler, into cement rotary kiln
506, the firing of clinker is participated in, cement cooperative disposal effect is played；
7) when cement kiln breaks down, the first valve 503 is closed, and the second valve 504 is opened, and escaping gas is through cloth wind
Device 507 blasts thoroughly to be washed in the sodium hydroxide solution in scrubbing tower 508, remaining chlorine, sulphur, heavy metal etc. in escaping gas
Harmful substance is all reacted with sodium hydroxide, into solution, and is prepared and is filled by 60 blowback lye of liquid pump with sodium hydroxide solution
The crystallization pond 401 for setting 40, crystallization precipitates in crystallization pond 401；
8) qualified discharge after 509 demisting of deentrainment tower of the gas after the washing of washed tower 508.
In technical process, Volatile Gas disposal plant 50, which can react, generates sodium hydroxide and sodium chloride mixed solution, and this is mixed
It closes solution and enters crystallization pond 401.Contain excessive sodium chloride in mixed solution, not due to sodium hydroxide and sodium chloride dissolution properties
Equally, crystallization comes out sodium chloride first from solution.Solution after crystallization, which enters, prepares pond 403, and sodium chloride crystal is periodically from analysis
It is cleared out in brilliant pond 401.
The sodium hydroxide solution of scrubbing tower 508 is provided by the liquid pump 60 of lye preparation facilities 40, it is ensured that is protected in scrubbing tower 508
Certain liquid level is held, ensures the washing effect of escaping gas.
In addition, after the first valve 503 and the switching of the second valve 504, the feeding capacity and work of entire disposal of ash and slag process system
Skill operation all needs to be adjusted accordingly.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of disposal of ash and slag technique, which is characterized in that include the following steps：
1) pending lime-ash mixes in drawing-in device with additive, into melting plant；
2) lime-ash is heated to molten by melting plant, wherein the gas generated enters Volatile Gas disposal plant；
3) there is the alkaline solution prepared in lye preparation facilities, alkaline solution is delivered to Volatile Gas disposal plant by liquid pump
In；
4) escaping gas and alkaline solution occur chemical reaction and generate salting liquid, and by qualified discharge after gas demisting；
5) salting liquid is delivered to crystallization in lye preparation facilities by liquid pump and precipitates.
2. disposal of ash and slag technique according to claim 1, which is characterized in that the lime-ash warp of molten condition in the step 2)
It is collected after cooling as construction material, a large amount of water vapour is generated during cooling and enters afterheat generating system,
Heat is provided for afterheat generating system.
3. disposal of ash and slag technique according to claim 1, which is characterized in that the volatility gas in the step 4) after chilling
Body eliminates most of salinity, and the escaping gas on a small quantity containing volatile heavy metal harmful substance is extracted out by air-introduced machine, enters
Cement kiln participates in the firing of clinker.
4. disposal of ash and slag technique according to claim 1, which is characterized in that the alkaline solution is sodium hydroxide solution,
Its a concentration of 5-50%.
5. disposal of ash and slag technique according to claim 1, which is characterized in that in step 2), the melting time is 1-6 hours,
Temperature 1000-1500 degree, pressure are normal pressure.
6. a kind of disposal of ash and slag system, include drawing-in device and with its sequentially connected melting plant, Volatile Gas disposal plant
With lye preparation facilities, which is characterized in that the drawing-in device is for mixing pending lime-ash and additive；It is described molten
Melt device one end with drawing-in device to be connected, lime-ash and additive mixture is heated to molten condition, the other end is sent out with waste heat
Electric system connection is generated electricity with heat supply；The Volatile Gas disposal plant is connected with melting plant and lye preparation facilities respectively, will
The escaping gas generated in melting plant is imported with alkaline solution prefabricated in lye preparation facilities in Volatile Gas disposal plant
It is mutually mixed qualified discharge after reacting demisting.
7. disposal of ash and slag system according to claim 6, which is characterized in that the Volatile Gas disposal plant includes spray
Tower and with its sequentially connected air-introduced machine, several valves, scrubbing tower and cement kiln, and ventilation terminal inside scrubbing tower and
Deentrainment tower above scrubbing tower, the escaping gas that melting plant generates enter the spray column and scrubbing tower and aqueous slkali
It is chemically reacted, the gas of the air-introduced machine extraction containing volatile hazardous substances enters the burning that cement kiln participates in clinker
At the valve control escaping gas flows to cement kiln or scrubbing tower, and escaping gas is blasted washing by the ventilation terminal
Tower, the deentrainment tower by after washing gas demisting and discharge.
8. disposal of ash and slag system according to claim 6, which is characterized in that the lye preparation facilities include storage tank,
Ration feeding machine, blender, crystallization pond and preparation pond, the storage tank connect ration feeding machine, and the blender, which is set to, prepares pond
Interior, salting liquid crystallization in crystallization pond, which precipitates and flows into extra salting liquid, prepares pond, and the ration feeding machine will be in storage tank
Solid base measuring fixed amount after be delivered to prepare pond in, solid base by blender stirring and dissolving formed aqueous slkali.
9. disposal of ash and slag system according to claim 6, which is characterized in that the drawing-in device include toter,
Several warehouses, ration feeding machine and several conveyers, the warehouse are connect with conveyer, and the toter carries lime-ash and adds
Charging is to warehouse, and the warehouse stores lime-ash and additive, and the ration feeding machine will be after lime-ash and additive measuring fixed amount
Into conveyer, lime-ash and additive are mixed and are delivered to melting plant by the conveyer.
10. disposal of ash and slag system according to claim 6, which is characterized in that the melting plant includes entrance, goes out
Mouth, exhaust outlet, high temperature smelting furnace, heating electrode and chilling slag-draining device, the entrance is set to the upper end of high temperature smelting furnace, described
The both sides that electrode is set to high temperature smelting furnace are heated, chilling slag-draining device is set to the rear end of outlet, and the exhaust outlet is set to high temperature melting
Melt the upper right side of stove, lime-ash enters in high temperature smelting furnace, heats heated by electrodes lime-ash, the ash of the outlet output molten condition
Slag, chilling slag-draining device cool down lime-ash, and the volatilization gas generated when melting is expelled in spray column by the exhaust outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810435236.6A CN108383402B (en) | 2018-05-09 | 2018-05-09 | Ash disposal process and system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810435236.6A CN108383402B (en) | 2018-05-09 | 2018-05-09 | Ash disposal process and system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108383402A true CN108383402A (en) | 2018-08-10 |
| CN108383402B CN108383402B (en) | 2023-06-02 |
Family
ID=63070371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810435236.6A Active CN108383402B (en) | 2018-05-09 | 2018-05-09 | Ash disposal process and system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108383402B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000179826A (en) * | 1998-12-18 | 2000-06-27 | Chiyoda Corp | Method for treating exhaust gas containing fly ash |
| CN102221211A (en) * | 2011-06-02 | 2011-10-19 | 浙江大学 | Melting solidification integrated method and system for incineration of hazardous wastes and incinerated fly ash |
| CN106122980A (en) * | 2016-08-10 | 2016-11-16 | 广州维港环保科技有限公司 | A kind of process system for cement kiln synergic processing hazardous waste |
| CN106152148A (en) * | 2016-09-23 | 2016-11-23 | 广州维港环保科技有限公司 | A kind of burning smelting process system of dangerous waste disposal |
| CN106402896A (en) * | 2016-11-10 | 2017-02-15 | 光大环境科技（中国）有限公司 | Waste incineration fly ash plasma melting treatment system |
| CN107030093A (en) * | 2017-05-03 | 2017-08-11 | 江苏天楹环保能源成套设备有限公司 | One kind combines washing and plasma fusion handles flying ash system |
-
2018
- 2018-05-09 CN CN201810435236.6A patent/CN108383402B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000179826A (en) * | 1998-12-18 | 2000-06-27 | Chiyoda Corp | Method for treating exhaust gas containing fly ash |
| CN102221211A (en) * | 2011-06-02 | 2011-10-19 | 浙江大学 | Melting solidification integrated method and system for incineration of hazardous wastes and incinerated fly ash |
| CN106122980A (en) * | 2016-08-10 | 2016-11-16 | 广州维港环保科技有限公司 | A kind of process system for cement kiln synergic processing hazardous waste |
| CN106152148A (en) * | 2016-09-23 | 2016-11-23 | 广州维港环保科技有限公司 | A kind of burning smelting process system of dangerous waste disposal |
| CN106402896A (en) * | 2016-11-10 | 2017-02-15 | 光大环境科技（中国）有限公司 | Waste incineration fly ash plasma melting treatment system |
| CN107030093A (en) * | 2017-05-03 | 2017-08-11 | 江苏天楹环保能源成套设备有限公司 | One kind combines washing and plasma fusion handles flying ash system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108383402B (en) | 2023-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108480360B (en) | Method for recycling fly ash resources and discharging tail gas in ultra-clean mode by melting method of rotary kiln | |
| CN109539272A (en) | The high-temperature plasma recycling recovery process of waste containing chlorine and system | |
| CN109458623A (en) | A kind of high chlorinated waste water burning environmental protection and energy saving exhaust system of high saliferous | |
| CN204006025U (en) | A kind of dangerous waste and medical waste incinerator complexes | |
| CN106987275A (en) | The high-temperature plasma gasification and melting processing system and method for trade waste | |
| CN204593400U (en) | A kind of industry danger waste burning system of multiple physical states | |
| CN103557526A (en) | Complete equipment of hazardous waste and medical waste incinerator and incineration method of hazardous waste and medical waste | |
| CN108704926A (en) | A kind of processing of plasma fusing fly ash and metal recovery utilize system | |
| CN109012124A (en) | A kind of dangerous waste incineration flue gas depth denitration purification system and method | |
| CN113182311A (en) | Hazardous waste treatment system and method based on medium-temperature pyrolysis and plasma high-temperature melting | |
| CN102723117A (en) | A high-temperature incineration and solidification method for radioactive waste resin plasma | |
| CN112628747A (en) | Hazardous waste innocent treatment integrated system | |
| CN113310056A (en) | Hazardous waste incineration treatment system and method | |
| CN206385096U (en) | The high-temperature plasma gasification and melting processing system of trade waste | |
| CN100398907C (en) | Fluidized bed incineration method for industrial organic waste liquid with high salt content | |
| CN106152148A (en) | A kind of burning smelting process system of dangerous waste disposal | |
| CN110482892A (en) | The technique of one kind of multiple inorganic dangerous waste collaboration molten sintering producing building haydites | |
| CN106524183A (en) | Method for achieving harmless disposal of garbage fly ash by means of rotary kiln technology | |
| CN209076405U (en) | A kind of dangerous waste incineration flue gas depth denitration purification system | |
| CN105039726A (en) | Chromium slag processing method | |
| CN211260830U (en) | High-salt-content chlorine-containing organic waste liquid zero-emission resource utilization system | |
| CN109469911A (en) | A kind of low heat value water-containing sludge plasma melting method for innocent treatment and the system for implementing this method | |
| CN206252987U (en) | Reclaim the device of HCl gases | |
| CN209716022U (en) | A kind of device of recycling treatment chemical industry abraum salt | |
| CN206911924U (en) | Process unit for abraum salt recycling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |