CN113020201B - Incineration fly ash resource treatment device - Google Patents
Incineration fly ash resource treatment device Download PDFInfo
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- CN113020201B CN113020201B CN202110132378.7A CN202110132378A CN113020201B CN 113020201 B CN113020201 B CN 113020201B CN 202110132378 A CN202110132378 A CN 202110132378A CN 113020201 B CN113020201 B CN 113020201B
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- 239000010881 fly ash Substances 0.000 title claims abstract description 140
- 238000010438 heat treatment Methods 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 208000005156 Dehydration Diseases 0.000 claims abstract description 34
- 230000018044 dehydration Effects 0.000 claims abstract description 34
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 34
- 238000002386 leaching Methods 0.000 claims abstract description 32
- 238000003860 storage Methods 0.000 claims abstract description 28
- 238000002844 melting Methods 0.000 claims abstract description 22
- 230000008018 melting Effects 0.000 claims abstract description 18
- 239000000126 substance Substances 0.000 claims abstract description 13
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 7
- 231100000719 pollutant Toxicity 0.000 claims abstract description 7
- 230000000750 progressive effect Effects 0.000 claims abstract description 7
- 230000002378 acidificating effect Effects 0.000 claims abstract description 3
- 238000001035 drying Methods 0.000 claims abstract description 3
- 238000006243 chemical reaction Methods 0.000 claims description 36
- 239000003153 chemical reaction reagent Substances 0.000 claims description 30
- 238000005192 partition Methods 0.000 claims description 19
- 238000004064 recycling Methods 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 16
- 239000000853 adhesive Substances 0.000 claims description 13
- 230000001070 adhesive effect Effects 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- 230000002457 bidirectional effect Effects 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 239000002202 Polyethylene glycol Substances 0.000 claims description 4
- 229920001223 polyethylene glycol Polymers 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 239000012528 membrane Substances 0.000 description 12
- 229910001385 heavy metal Inorganic materials 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011859 microparticle Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000007522 mineralic acids Chemical group 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/10—Burned or pyrolised refuse
-
- 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
- C04B7/28—Cements from oil shales, residues or waste other than slag from combustion residues, e.g. ashes or slags from waste incineration
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Ceramic Engineering (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Civil Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a resource treatment device for incineration fly ash, which relates to the field of incineration fly ash treatment, and adopts the technical scheme that the resource treatment device comprises a fly ash storage device, a leaching device for removing pollutants in fly ash by utilizing acidic substances, a dehydration treatment device for drying the fly ash after leaching and a staged melting device for resource treatment of the fly ash; the dehydration treatment device comprises a conveying device which is arranged at the bottom and pushes fly ash to flow, a concave treatment tank which separates the fly ash from water is arranged at the upper side of the conveying device, and a biological film which blocks the loss of the fly ash is arranged in the concave treatment tank; the staged melting device comprises a spiral pipe for circulating the fly ash and a heating pipe arranged on the outer side of the spiral pipe for heating the fly ash, and a first heating device and a second heating device for heating the fly ash in a staged progressive manner are arranged on the outer side of the heating pipe; the technical effect is that the self structural characteristics of the incineration fly ash are reserved for characteristic resource treatment.
Description
Technical Field
The invention relates to the field of incineration fly ash treatment, in particular to an incineration fly ash recycling treatment device.
Background
Fly ash refers to tiny ash particles discharged in the dye combustion process, and the particle size of the fly ash is generally between 1 and 100 mu m. The main sources of the fly ash are domestic garbage incineration and coal-fired fly ash, the incineration fly ash is a secondary pollutant generated in the garbage incineration process, and the output of the incineration fly ash is about 0.5% -3% of the garbage incineration amount. The incineration fly ash obtained by burning the household garbage is simultaneously enriched with a plurality of heavy metals, the inlet and outlet levels of the heavy metals reach the identification standard of hazardous wastes, and the heavy metals can cause serious toxic action on the environment, so the incineration fly ash must be subjected to harmless treatment before safe landfill. Meanwhile, the incineration fly ash contains CaO and SiO2And Fe2O3The components, like the raw materials for cement production, are often used as a substitute for the raw materials for cement production or for making concrete and aggregate using fly ash.
The resource utilization of the incineration fly ash is a great trend of the treatment of the incineration fly ash at present, but the utilization of the fly ash at present is only based on the characteristics of general components of the incineration fly ash, neglects the characteristics of low water content, irregular shape, uneven particle size, high porosity and large specific surface area of the incineration fly ash, is not thorough in resource utilization of the incineration fly ash, and easily causes resource waste.
Disclosure of Invention
The invention aims to provide a incineration fly ash recycling treatment device which has the advantage of reserving the structural characteristics of incineration fly ash to carry out characteristic recycling treatment.
The technical purpose of the invention is realized by the following technical scheme:
a incineration fly ash resource treatment device is externally connected with a fly ash storage device and comprises a leaching device for removing pollutants in fly ash by utilizing acidic substances, a dehydration treatment device for drying the fly ash after leaching and a staged melting device for recycling the fly ash; the dehydration treatment device comprises a conveying device which is arranged at the bottom and pushes fly ash to flow, a concave treatment tank which separates the fly ash from water is arranged at the upper side of the conveying device, and a biological film which blocks the loss of the fly ash is arranged in the concave treatment tank;
the staged melting device comprises a spiral pipe for circulating the fly ash and a heating pipe arranged on the outer side of the spiral pipe for heating the fly ash;
the incineration fly ash recycling device also comprises a reaction device which is positioned between the dehydration treatment device and the staged melting device and used for pretreating fly ash, the reaction device is arranged at the head end of the spiral pipe, and the other end of the reaction device is connected with a bidirectional outlet;
the staged melting device also comprises a first heating device and a second heating device which are positioned outside the heating pipes and used for heating the fly ash in a staged progressive manner; and one end of the heating pipe is provided with a binder adding device.
By adopting the technical scheme, the incineration fly ash is leached by water firstly, the fly ash is not separated by utilizing the solubility of different substances in water solvent, harmful substances in the fly ash are removed by removing a water-melting layer, and when the fly ash enters a dehydration treatment device after being leached, the fly ash is subjected to primary dehydration and secondary dehydration under the action of gravity; after dehydration, adding corresponding reagents, then carrying out cyclic segmented progressive heating, carrying out two different recycling treatment modes on the fly ash, and carrying out mutual heat transfer by utilizing the temperature difference between the two modes, thereby realizing recycling under the condition of keeping the structural characteristics of the fly ash.
Further setting: the bidirectional outlet is divided into a circulating outlet and an exhaust outlet, the circulating outlet is communicated with the heating pipe, and the exhaust outlet is communicated with an external storage tank; the heating pipe is divided into a high-temperature port and a low-temperature port, and a binder adding device is arranged at the low-temperature port of the heating pipe; the high-temperature port is provided with a discharge channel communicated with the outside, and the discharge channel is connected with the film forming device.
By adopting the technical scheme, one end of the bidirectional outlet is connected with the outside to collect wastewater, and the other end recycles the fly ash heated firstly into the heating pipe to be used as a heat source to heat other fly ash, so that mutual conversion and circulation of heat are realized.
Further setting: polyethylene glycol adhesive is placed in the adhesive adding device.
By adopting the technical scheme, the polyethylene glycol adhesive can strengthen the crosslinking performance among fly ash molecules, increase the plasticity of the fly ash molecules and create conditions for being used as other raw materials subsequently.
Further setting: the concave treatment tank in the dehydration device is divided into an inner reaction cavity and an outer water storage cavity; the connection surface of the inner reaction cavity and the outer water storage cavity is a concave partition plate, the surface of the concave partition plate is attached with the biological membrane, and the bottom end of the concave partition plate is fixed with the conveying device.
By adopting the technical scheme, when the fly ash enters the dehydration treatment device after being washed, the fly ash firstly passes through the concave treatment tank, the fly ash is collected downwards under the action of gravity, and certain pressure is generated on the inclined plane while being collected, and only water and pollutants of micro-particles such as soluble chloride, heavy metal and the like can enter the outer water storage cavity through the biological membrane due to the fact that the aperture of the biological membrane is smaller than the particle size of the fly ash, so that primary dehydration is completed; the fly ash can naturally permeate to the outside, and secondary dehydration is completed under the action of a biological membrane. The dehydrated fly ash enters the reaction device under the action of the conveying device.
Further setting: the reaction device comprises a reaction box, a pore-forming agent adding box and a stirring device; the stirring device is suspended and fixed at the lower end of the reagent channel, the upper end of the reagent channel is fixed at the top of the reaction box, and the reagent channel penetrates through the reaction box and is communicated with the pore-forming agent adding box; the stirring device comprises a central ball and a stirring blade.
By adopting the technical scheme, the dehydrated fly ash is uniformly mixed with the pore-forming agent, so that the resource pretreatment is realized, and then the mixture enters the staged melting device.
Further setting: the pore diameter of the biological membrane is less than 1 μm.
By adopting the technical scheme, the membrane with the aperture smaller than 1 mu m and the screening function is arranged according to the characteristic that the diameter of the fly ash is larger than 1 mu m, so that the fly ash can be prevented from flowing through a biological membrane to cause the loss of the fly ash.
Further setting: the leaching device comprises a leaching chamber, a leaching spray head arranged above the inside of the leaching chamber, a rotating assembly for pushing the leaching spray head to rotate and a water tank for providing a water source; the shower room is respectively communicated with the water tank and the rotating assembly through a fixed channel at the top, and a reagent cavity is arranged at the connecting part of the fixed channel and the water tank; the reagent cavity comprises a storage cavity for storing the reagent, an injection tube connected with two ends of the storage cavity and a pushing piece; the injection tube is communicated with the fixed channel; the bottom of the leaching device is provided with an inclined bottom plate, one end of the inclined bottom plate is connected with a discharge port, and the discharge port is communicated with the dehydration treatment device.
By adopting the technical scheme, the spray head rotates to rinse the fly ash, the fly ash can be solidified to a certain extent while rinsing, subsequent centralized treatment is facilitated, the fly ash is rinsed by water, the solubility of different substances in water solvent is utilized, the fly ash is not required to be separated, and harmful substances in the fly ash are removed by removing a water-melting layer, for example, soluble chloride in the fly ash can be removed, and the content of heavy metal is reduced.
Further setting: the reagent stored in the reagent cavity is inorganic acid such as hydrochloric acid or nitric acid.
By adopting the technical scheme, the removal effect of harmful substances can be enhanced by adding a proper amount of hydrochloric acid or nitric acid.
Further setting: and a telescopic baffle is arranged between the discharge port and the dehydration treatment device.
By adopting the technical scheme, the telescopic baffle can prevent the fly ash from flowing into the dehydration treatment device during leaching, so that the leaching effect is not ideal.
Further setting: and a discharge pipeline communicated with the leaching device is arranged in the fly ash storage device.
By adopting the technical scheme, the discharge pipeline can continuously convey the fly ash generated by incineration to the device for subsequent treatment.
In conclusion, the invention has the following beneficial effects: the fly ash is leached by water, the fly ash is not separated by utilizing the solubility of different substances in water solvent, harmful substances in the fly ash are removed by removing a water-melting layer, and when the fly ash enters a dehydration treatment device after being leached, the fly ash is subjected to primary dehydration and secondary dehydration under the action of gravity; after dehydration, adding corresponding reagents, then carrying out cyclic segmented progressive heating, carrying out two different recycling treatment modes on the fly ash, and carrying out mutual heat transfer by utilizing the temperature difference between the two modes, thereby realizing recycling under the condition of keeping the structural characteristics of the fly ash.
Drawings
FIG. 1 is a schematic view of the overall structure of an incineration fly ash recycling treatment apparatus;
FIG. 2 is a schematic structural diagram of a leaching device of an incineration fly ash recycling treatment device;
FIG. 3 is a schematic view of the configuration of a dehydration treatment apparatus of the incineration fly ash recycling treatment apparatus;
FIG. 4 is a schematic view of the reaction apparatus of the incineration fly ash recycling apparatus;
FIG. 5 is a schematic view showing a staged melting apparatus of an incineration fly ash recycling apparatus;
in the figure, 100, fly ash storage device; 101. a discharge channel;
200. a leaching device; 201. a shower room; 202. leaching the spray head; 203. a water tank; 204. a reagent chamber; 205. a rotating assembly; 206. a fixed channel; 207. a pusher member; 208. a storage chamber; 209. an injection tube; 210. An inclined floor; 211. a discharge port; 212. a telescopic baffle;
300. a dehydration treatment device; 301. biofilms (not shown); 302. a concave treatment tank; 303. a conveying device; 304. an inner reaction chamber; 305. an outer water storage chamber; 306. a concave partition plate; 307. an upper partition plate; 308. a lower partition plate;
400. a reaction device; 401. a reaction box; 402. a pore-forming agent adding box; 403. a reagent channel; 404. a stirring device; 405. a center ball; 406. a stirring blade;
500. a staged melting device; 501. a spiral tube; 502. heating a tube; 503. a bidirectional outlet; 504. a recycle outlet; 505. an exhaust outlet; 506. an outside storage tank (not shown); 507. a first heating device; 508. a second heating device; 509. a high temperature port; 510. a low temperature port; 511. a discharge channel; 512. an adhesive adding device;
600. provided is a film forming apparatus.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
First preferred embodiment:
a fly ash incineration resource treatment device comprises a fly ash storage device 100, a leaching device 200, a dehydration treatment device 300, a reaction device 400, a staged melting device 500 and a film forming device 600, as shown in figure 1.
The discharge pipeline of the fly ash storage device 100 is communicated with the leaching device 200.
As shown in fig. 2, the washing apparatus 200 includes a washing chamber 201, a washing shower 202, a water tank 203, a reagent chamber 204, and a rotating assembly 205; the top of the reagent box is provided with a fixed channel 206, the lower end of the fixed channel 206 is connected with a rotating assembly 205, and the other end of the fixed channel 206 passes through the leaching chamber 201 and is communicated to the water box 203; the bottom of the rotating assembly 205 is communicated with the leaching spray head 202, a cavity for water to flow is formed in the rotating assembly 205, and the cavity is communicated with the leaching spray head 202; a reagent cavity 204 is externally connected to a connecting section of the fixed channel 206 and the water tank 203, the reagent cavity 204 comprises a pushing member 207, a storage cavity 208 and an injection pipe 209, wherein the pushing member 207 and the injection pipe 209 are respectively arranged at two ends of the storage cavity 208, and the injection pipe 209 is communicated with the fixed channel 206; nitric acid or hydrochloric acid with a certain concentration is contained in the reagent cavity 204 and is used as an auxiliary reagent for leaching the fly ash.
The fly ash is leached by water, the solubility of different substances in water solvent is utilized, the fly ash is not separated, and the harmful substances in the fly ash are removed by removing a water-melting layer, for example, the soluble chloride in the fly ash can be removed, so that the heavy metal content is reduced; the removal effect of harmful substances can be enhanced by adding a proper amount of hydrochloric acid or nitric acid.
The bottom end of the leaching device 200 is provided with an inclined bottom plate 210, the inclined bottom plate 210 inclines towards one end, the lowest end of the inclined bottom plate 210 is provided with a discharge port 211, and the discharge port 211 is communicated with the dehydration treatment device 300; a telescopic baffle 212 is arranged between the discharge port 211 and the dehydration treatment device 300.
As shown in fig. 3, the dehydration treatment apparatus 300 comprises a biofilm 301, a concave treatment tank 302, and a transfer apparatus 303; the concave treatment tank 302 is divided into an inner reaction chamber 304 and an outer water storage chamber 305, the connection surface of the inner reaction chamber 304 and the outer water storage chamber 305 is a concave partition 306, the concave partition 306 is divided into an upper partition 307 and a lower partition 308, the upper partition 307 is an inclined plane which inclines from two sides to the middle, a biological film 301 is arranged on the inclined plane, a conveying device 303 is arranged at the bottom of the lower partition 308, and the side surface of the lower partition 308 is also arranged on the biological film 301; the biological membrane 301 is a reverse osmosis membrane with a pore size of less than 1 μm.
When fly ash enters the water supporting treatment device after being washed, the fly ash firstly passes through the upper partition plate 307 of the concave treatment tank 302, the fly ash is collected downwards under the action of gravity, certain pressure is generated on the inclined surface of the upper partition plate 307 during collection, and only water and pollutants of micro particles such as soluble chloride, heavy metal and the like can enter the outer water storage cavity 305 through the biological membrane 301 to complete primary dehydration as the aperture of the biological membrane 301 is smaller than the particle size of the fly ash; the fly ash entering the lower partition plate 308 naturally permeates to the outside, and the secondary dehydration is also completed under the action of the biological membrane 301. The fly ash that has completed the dewatering enters the reaction apparatus 400 by the conveyor 303.
As shown in fig. 4, the reaction apparatus 400 includes a reaction chamber 401, a pore-forming agent adding chamber 402, a reagent channel 403 and a stirring apparatus 404, the stirring apparatus 404 is suspended and fixed at the lower end of the reagent channel 403, the upper end of the reagent channel 403 is fixed at the top of the reaction chamber 401, and the stirring apparatus passes through the top of the reaction chamber 401 and is communicated with the pore-forming agent adding chamber 402 outside the reaction chamber 401; the stirring device 404 includes a center ball 405 and a stirring blade 406, and one end of the stirring blade 406 is fixed to the center ball 405. Activated carbon or other volatile pore-forming agents are contained in the pore-forming agent adding box 402; in the reaction apparatus 400, the dehydrated fly ash is uniformly mixed with the pore-forming agent, and then enters the staged melting apparatus 500.
As shown in fig. 5, the staged melting device 500 includes a spiral pipe 501 and a heating pipe 502, the spiral pipe 501 is located inside the heating pipe 502, the spiral pipe 501 is a bidirectional spiral structure, one end of the spiral pipe 501 is connected with the reaction device 400, and the other end is connected with a bidirectional outlet 503; the bidirectional outlet 503 is divided into a circulating outlet 504 and a discharge outlet 505, the circulating outlet 504 is communicated with the heating pipe 502, and the discharge outlet 505 is communicated with an external storage tank 506; the heating pipe 502 is provided with a first heating device 507 and a second heating device 508, and the first heating device 507 and the second heating device 508 are wound around the outside of the heating pipe 502 in sections; the heating pipe 502 is divided into a low-temperature port 510 and a high-temperature port 509, the low-temperature port 510 is one end close to the reaction device 400, a first heating device 507 and a second heating device 508 are arranged at one time through the low-temperature port 510 and the high-temperature port 509, the heating temperature of the first heating device 507 is controlled to be 400-500 ℃, the heating temperature of the second heating device 508 is controlled to be 1200-1300 ℃, the high-temperature port 509 is provided with a discharge channel 511 communicated with the outside, and the discharge channel 511 is connected with the film forming device 600; an adhesive adding device 512 is arranged at the low-temperature port 510 of the heating pipe 502, and the reagent is selected to be polyethylene glycol adhesive.
The mixed fly ash mixture enters a spiral pipe 501 of the sectional melting device, circulates forwards in the spiral pipe 501 to a bidirectional outlet 503, and can be controlled to enter a circulating outlet 504 or a discharge outlet 505 according to manual selection; if the fly ash mixture enters the heating pipe 502 through the circulation outlet 504, the fly ash mixture is mixed with the adhesive at the low-temperature end, and then the mixture is heated by the first heating device 507 and the second heating device 508 in a segmented progressive heating mode, and the spiral pipe 501 inside the heating pipe 502 is indirectly heated after the heating pipe 502 is heated according to the heat conduction principle.
The fly ash mixture is heated in a segmented progressive manner, so that the phenomenon that the porous structure of the fly ash is damaged by one-time heating and melting is avoided while the pollutants such as heavy metals in the fly ash mixture can be discharged for the second time, and meanwhile, the fly ash particles can form uniform holes by adding the pore-forming agent, so that the uniform communicated hole structure is increased on the basis of irregular micropores contained in the fly ash, and the heat insulation performance and the sound absorption performance of the fly ash are enhanced; the fly ash is heated in a separate circulation mode, the fly ash material is treated by different materials, and the fly ash without adding an adhesive can be used for preparing heat-insulating and sound-absorbing coating; the fly ash added with the adhesive has stronger plasticity and can be used as a raw material of ceramic products.
The above-mentioned embodiments are merely illustrative and not restrictive, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but only protected by the patent laws within the scope of the claims.
Claims (7)
1. The utility model provides an incineration fly ash resourceful treatment device, external fly ash storage device (100), its characterized in that: the incineration fly ash recycling treatment device comprises a leaching device (200) for removing pollutants in fly ash by utilizing acidic substances, a dehydration treatment device (300) for drying the fly ash after leaching and a staged melting device (500) for recycling the fly ash; the dehydration treatment device (300) comprises a conveying device (303) which is arranged at the bottom and pushes fly ash to flow, a concave treatment tank (302) which separates the fly ash from water is arranged on the upper side of the conveying device (303), and a biological film (301) which blocks the loss of the fly ash is arranged in the concave treatment tank (302);
the staged melting device (500) comprises a spiral pipe (501) through which fly ash flows and a heating pipe (502) which is arranged outside the spiral pipe (501) and is used for heating the fly ash;
the incineration fly ash recycling device also comprises a reaction device (400) which is positioned between the dehydration treatment device (300) and the staged melting device (500) and used for pretreating fly ash, wherein the reaction device (400) is arranged at the head end position of the spiral pipe (501), and the other end of the reaction device is connected with a bidirectional outlet (503);
the reaction device (400) comprises a reaction box (401), a pore-forming agent adding box (402) and a stirring device (404); the stirring device (404) is suspended and fixed at the lower end of a reagent channel (403), the upper end of the reagent channel (403) is fixed at the top of the reaction box (401), and the reagent channel (403) penetrates through the reaction box (401) and is communicated with the pore-forming agent adding box (402); the stirring device (404) comprises a central ball (405) and a stirring blade (406);
the staged melting device (500) comprises a first heating device (507) and a second heating device (508) which are positioned outside the heating pipe (502) and used for heating fly ash in a staged progressive manner; one end of the heating pipe (502) is provided with an adhesive adding device (512);
the bidirectional outlet (503) is divided into a circulating outlet (504) and a discharge outlet (505), the circulating outlet (504) is communicated with the heating pipe (502), and the discharge outlet (505) is communicated with an external storage tank; the heating pipe (502) is divided into a high-temperature port (509) and a low-temperature port (510), and the low-temperature port (510) of the heating pipe (502) is provided with an adhesive adding device; the high-temperature port (509) is provided with a discharge channel (511) communicated with the outside, and the discharge channel (511) is connected with the film forming device (600);
the concave treatment tank (302) in the dehydration treatment device (300) is divided into an inner reaction chamber (304) and an outer water storage chamber (305); the connection surface of the inner reaction cavity (304) and the outer water storage cavity (305) is a concave partition plate (306), the biofilm (301) is attached to the surface of the concave partition plate (306), and the conveying device (303) is fixed at the bottom end of the concave partition plate (306); the concave clapboard (306) is divided into an upper clapboard (307) and a lower clapboard (308), the upper clapboard (307) is an inclined plane which inclines from two sides to the middle, and a biological film (301) is arranged on the inclined plane.
2. The incineration fly ash resource treatment device according to claim 1, characterized in that: polyethylene glycol adhesive is placed in the adhesive adding device (512).
3. The incineration fly ash resource treatment device according to claim 1, characterized in that: the pore size of the biofilm (301) is less than 1 μm.
4. The incineration fly ash resource treatment device according to claim 1, characterized in that: the leaching device (200) comprises a leaching chamber (201), a leaching spray head (202) arranged above the interior of the leaching chamber (201), a rotating assembly (205) for pushing the leaching spray head (202) to rotate and a water tank (203) for providing water source; the shower room (201) is respectively communicated with the water tank (203) and the rotating assembly (205) through a fixed channel (206) at the top, and a reagent cavity (204) is arranged at the connecting part of the fixed channel (206) and the water tank (203); the reagent chamber (204) comprises a storage chamber (208) for storing the reagent, an injection tube (209) connected with the two ends of the storage chamber and a pushing piece (207); the injection tube (209) is communicated with the fixed channel (206); the bottom end of the leaching device (200) is provided with an inclined bottom plate (210), one end of the inclined bottom plate (210) is connected with a discharge port (211), and the discharge port (211) is communicated with the dehydration treatment device (300).
5. The incineration fly ash resource treatment device according to claim 4, characterized in that: the reagent stored in the reagent cavity (204) is hydrochloric acid or nitric acid.
6. The incineration fly ash resource treatment device according to claim 5, characterized in that: a telescopic baffle (212) is arranged between the discharge port (211) and the dehydration treatment device (300).
7. The incineration fly ash resource treatment device according to claim 1, characterized in that: a discharge channel (101) communicated with the leaching device (200) is arranged in the fly ash storage device (100).
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| CN202110132378.7A CN113020201B (en) | 2021-01-31 | 2021-01-31 | Incineration fly ash resource treatment device |
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| CH681810A5 (en) * | 1990-10-22 | 1993-05-28 | Von Roll Ag | |
| JP4445147B2 (en) * | 2001-03-22 | 2010-04-07 | カワサキプラントシステムズ株式会社 | Sludge treatment method and apparatus |
| CN102464458B (en) * | 2011-11-28 | 2013-04-03 | 泸州兰良水泥有限公司 | Method and equipment for calcining blending material with high activity by feeding out of kiln head |
| CN102674724A (en) * | 2012-05-11 | 2012-09-19 | 赵益民 | Two-stage decomposition material preburning cement clinker calcining system and process thereof |
| CN103008331B (en) * | 2012-12-18 | 2015-10-28 | 北京神雾环境能源科技集团股份有限公司 | The recycling processing method of one way of life rubbish and biochemical sludge |
| CN105436192B (en) * | 2015-12-18 | 2017-07-25 | 中国天楹股份有限公司 | A kind of garbage burning flying dust treating system based on minimizing |
| CN108036323A (en) * | 2017-12-29 | 2018-05-15 | 长沙中硅水泥技术开发有限公司 | The system and method that cement kiln cooperates with multifuel combustion garbage flying ash and sludge eco-cement |
| CN108117286B (en) * | 2018-02-05 | 2023-09-26 | 北京中科国润环保科技有限公司 | Washing and desalting system and method for waste incineration fly ash or kiln ash |
| CN108480360B (en) * | 2018-03-04 | 2022-05-27 | 天津壹鸣环境科技股份有限公司 | Method for recycling fly ash resources and discharging tail gas in ultra-clean mode by melting method of rotary kiln |
| CN108530031B (en) * | 2018-05-03 | 2023-08-01 | 天津城建大学 | Device and method for firing porous ceramic by using waste incineration fly ash |
| CN109663557B (en) * | 2018-12-24 | 2024-05-14 | 生态环境部华南环境科学研究所 | Single-mode microwave reaction device and method for removing dioxin in waste incineration fly ash |
| CN109956690B (en) * | 2019-03-28 | 2021-09-14 | 天津中材工程研究中心有限公司 | Method for treating fly ash generated by burning household garbage in cement industry |
| CN211035721U (en) * | 2019-11-15 | 2020-07-17 | 深圳市航天新材科技有限公司 | High-temperature thermal treatment resource utilization system for household garbage incineration fly ash |
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