CN113701163B - Fly ash high-temperature melting treatment system - Google Patents
Fly ash high-temperature melting treatment system Download PDFInfo
- Publication number
- CN113701163B CN113701163B CN202111082410.1A CN202111082410A CN113701163B CN 113701163 B CN113701163 B CN 113701163B CN 202111082410 A CN202111082410 A CN 202111082410A CN 113701163 B CN113701163 B CN 113701163B
- Authority
- CN
- China
- Prior art keywords
- melting
- pipe
- fly ash
- feeding
- section
- 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.)
- Active
Links
- 238000002844 melting Methods 0.000 title claims abstract description 160
- 230000008018 melting Effects 0.000 title claims abstract description 159
- 239000010881 fly ash Substances 0.000 title claims abstract description 79
- 238000002485 combustion reaction Methods 0.000 claims abstract description 54
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000007789 gas Substances 0.000 claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 27
- 239000003345 natural gas Substances 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000002893 slag Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 37
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 34
- 239000003546 flue gas Substances 0.000 claims description 34
- 239000000428 dust Substances 0.000 claims description 31
- 238000004062 sedimentation Methods 0.000 claims description 27
- 238000002156 mixing Methods 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 238000011084 recovery Methods 0.000 claims description 18
- 230000001502 supplementing effect Effects 0.000 claims description 9
- 239000002912 waste gas Substances 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 8
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 7
- 239000010962 carbon steel Substances 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 5
- 239000000110 cooling liquid Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000010128 melt processing Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000003491 array Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 25
- 238000000034 method Methods 0.000 description 24
- 230000008569 process Effects 0.000 description 23
- 239000000779 smoke Substances 0.000 description 13
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 229920000742 Cotton Polymers 0.000 description 4
- 239000002956 ash Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000006060 molten glass Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 125000000864 peroxy group Chemical group O(O*)* 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/006—General arrangement of incineration plant, e.g. flow sheets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
- F23G5/12—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating using gaseous or liquid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
- F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
- F23G5/16—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion in a separate combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/442—Waste feed arrangements
- F23G5/444—Waste feed arrangements for solid waste
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/50—Control or safety arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/027—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using cyclone separators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2202/00—Combustion
- F23G2202/10—Combustion in two or more stages
- F23G2202/103—Combustion in two or more stages in separate chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2204/00—Supplementary heating arrangements
- F23G2204/10—Supplementary heating arrangements using auxiliary fuel
- F23G2204/103—Supplementary heating arrangements using auxiliary fuel gaseous or liquid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/10—Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/40—Intercepting solids by cyclones
Abstract
The invention discloses a fly ash high-temperature melting treatment system, relates to the technical field of environmental protection, aims to solve the problem of recycling of fly ash, and has the technical scheme that: the device comprises a melting system, a feeding system and an exhaust gas treatment system, wherein the melting system comprises a melting furnace, the lower part of the melting furnace is provided with a water-cooling fence, the upper part of the water-cooling fence is a melting section, the lower part of the water-cooling fence is a combustion section, the bottom of the melting furnace is provided with a slag groove, one side of the slag groove is provided with a melting liquid outlet groove with an overflow groove, and the slag groove and the melting liquid outlet groove are communicated through a liquid outlet hole; the outer side of the combustion section is provided with a plurality of annular arrays of natural gas nozzles, and the natural gas nozzles are obliquely downward and eccentrically arranged; the upper part of the melting furnace is provided with a flue pipe and a feed inlet. The invention adopts natural gas for combustion and heating, has high efficiency of burning and melting, less pollution impurities in tail gas after fly ash burning, and higher utilization rate of the whole fly ash resource.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a fly ash high-temperature melting treatment system.
Background
Fly ash with extremely fine granularity is produced in the industrial production process, and the particle size is generally between 1 and 100 mu m; during the treatment, it may be subjected to a melt treatment together with a composition regulator to consolidate the heavy metals in the fly ash. The device used for the melting treatment can be a high-temperature melting furnace, and the high-temperature melting furnace is generally heated and calcined by coal, and the furnace temperature can only reach about 1300 ℃. Other harmful substances are generated in the combustion heat supply process of coal, so that the environmental pollution is influenced; and the melting point of part of the high-melting ash reaches 1500 ℃, the efficiency of the melting of the fly ash is low at 1300 ℃, even the fly ash cannot be melted completely, a large amount of fly ash impurities still exist in the discharged tail gas, and finally the ideal effect of the fly ash treatment cannot be achieved.
There is therefore a need to propose a new solution to this problem.
Disclosure of Invention
The invention aims to solve the problems and provide a high-temperature melting treatment system for fly ash, which has the advantages of high efficiency of burning and melting, less pollution impurities in tail gas after the fly ash is burned, and higher utilization rate of the whole fly ash resource.
The technical aim of the invention is realized by the following technical scheme: the high-temperature melting treatment system for the fly ash comprises a melting system, a feeding system and an exhaust gas treatment system, wherein the melting system comprises a melting furnace, the lower part of the melting furnace is provided with a water cooling fence, the upper part of the water cooling fence is a melting section, the lower part of the water cooling fence is a combustion section, the bottom of the melting furnace is provided with a slag groove, one side of the slag groove is provided with a melting liquid outlet groove with an overflow groove, and the slag groove and the melting liquid outlet groove are communicated through a liquid outlet hole; the outside of the combustion section is provided with a plurality of natural gas nozzles distributed in an annular array, and the natural gas nozzles are obliquely downward and eccentrically arranged; the upper part of the melting furnace is provided with a flue pipe and a feed inlet.
The invention is further arranged that the water-cooling fence comprises a plurality of hollow carbon steel water pipes, and the carbon steel water pipes are communicated with a cooling liquid source to realize circulating cooling.
The invention is further characterized in that a safety hole is formed in the upper end of the melting furnace, a safety valve for blocking the safety hole is arranged at the upper part of the safety hole, a sliding rod is connected to the upper part of the safety valve, the sliding rod is supported in a sliding manner through a supporting frame, and a spring is elastically pressed between the supporting frame and the safety valve.
The feeding system comprises a feeding platform, a feeding device and a pressing device, wherein a feeding hopper is arranged on the upper side of the feeding platform, the feeding platform is connected with the feeding port and inclines downwards towards one side of the feeding port, the lower end of the feeding device is connected with the pressing device, the upper end of the feeding device is connected with the feeding hopper, a pushing rod is arranged on the upper portion of the feeding platform, a pushing plate is arranged at the output end of the pushing rod, and the pushing plate is used for pushing materials into the feeding port.
The invention is further characterized in that a feeding device for blocking is arranged at the feeding hole, the upper side of the feeding device is rotationally connected with the feeding hole, a fixing plate is fixed on the outer side of the upper part of the feeding hole, and a tension spring is connected between the fixing plate and the baffle plate.
The invention further provides that the waste gas treatment system comprises a cyclone dust removing device and a secondary combustion system, wherein the upper side of the cyclone dust removing device is communicated with the melting furnace through a flue pipe, the upper end of the cyclone dust removing device is connected with a discharge pipe, the lower end of the cyclone dust removing device is communicated with the melting section of the melting furnace through a return pipe, a mixer is arranged between the return pipe and the melting furnace, the secondary combustion system comprises a sedimentation bin, a heating bin and a secondary combustion bin which are connected from bottom to top, and the tail end of the discharge pipe is communicated with the outer side of the sedimentation bin.
The invention is further arranged that the diameter of the heating bin is smaller than that of the sedimentation bin and the secondary combustion bin, a plurality of heating guns are arranged outside the heating bin, a first mixing net is arranged inside the sedimentation bin, a second mixing net is arranged inside the secondary combustion bin, the sedimentation bin comprises an inclined surface facing away from the joint of the discharge pipes, a large-top small-bottom funnel-shaped heat recovery cover is arranged inside the secondary combustion bin, the lower end of the heat recovery cover is connected with a heat recovery pipe, the lower end of the heat recovery pipe sequentially penetrates through the heating bin and the sedimentation bin, an air return pipe extends out from the lower end of the sedimentation bin and is connected with the lower end of the air return pipe, and the other end of the air return pipe is communicated with the melting section; and a fan is arranged on the air return pipe.
The invention is further arranged that the front end and the rear end of the mixer are connected with the air return pipes, the inside of the mixer is provided with the throats with large ends and small middle ends, the injection end and the output end of each throat are respectively connected with the inner wall of the mixer, an annular mixing cavity is formed between each throat and the peripheral wall of the mixer, the outer side of each mixing cavity is connected with the air supplementing pipe which is used for being connected with an external air source, and the middle section of each throat is provided with a plurality of mixing holes.
The invention is further characterized in that a necking pipe is fixed in the middle of one side of the injection end of the throat pipe, the inner diameter of the necking pipe is in a structure with small middle and large two ends, a backflow hole is arranged in the middle section of the necking pipe, and the outer side of the backflow hole is connected with a backflow pipe.
The invention is further characterized in that a preheating device is arranged in the melting section, the preheating device comprises a preheating cover with the outer diameter slightly smaller than that of the melting section, a necking section is arranged at the upper end of the preheating cover, a flaring section is arranged at the upper end of the necking section, an air duct is sleeved in the preheating cover, a preheating gap is formed between the air duct and the preheating cover, a plurality of preheating coils distributed from top to bottom are arranged in the preheating gap, and the return pipe extends into the melting section and is communicated with the preheating gap;
the invention is further arranged that the lower end of the preheating cover is fixedly connected with a fixed sieve plate, the upper part of the fixed sieve plate is rotationally connected with a movable sieve plate and is driven to rotate by a rotating device, and a plurality of corresponding sieve material holes are arranged on the fixed sieve plate and the movable sieve plate; the edge of the fixed sieve plate is also provided with a sieve hole, the middle of the movable sieve plate is of a bulge structure, and a gap is formed between the upper part of the movable sieve plate and the lower end of the air duct;
the rotary device further comprises a hollow rotary cavity, the rotary blade is rotatably connected to the rotary cavity, one side of the rotary cavity is connected with an eccentrically arranged water pipe, the water pipe is used for circularly conveying water and driving the rotary blade to rotate, the upper end of the rotary blade is fixedly connected with a rotary shaft, and the upper end of the rotary shaft extends out of the rotary cavity and is fixedly connected with the movable sieve plate.
In summary, the invention has the following beneficial effects:
the melting system heats the fly ash by natural gas, and the spiral heating flame is formed by spraying flame through the natural gas nozzle, so that the burning efficiency is high, compared with the burning of coal, the burning system can reduce harmful pollutants generated in the burning process, and has a higher environmental protection effect; the method is characterized in that the waste gas treatment system is connected after the melting furnace, solid powder in the tail gas and the combustion tail gas can be separated through the cyclone dust collector, the recycling of fly ash can be realized, the subsequent pollution is reduced, the combustion tail gas is further combusted through the secondary combustion system to eliminate organic pollution such as dioxin, and the subsequent tail gas treatment is performed, so that the smoke purification and emission are higher than national standards, and the international high standard is reached; the fly ash molten material can be subjected to stable treatment and feeding by adopting the feeding system, a safety structure can be ensured to seal and protect a feed inlet in the feeding process, and tempering is prevented to ensure the safety of the melting system; and the top of the melting furnace is provided with a pressure relief structure, so that the pressure of the melting furnace can be controlled, and the explosion danger of the melting furnace is avoided.
Drawings
FIG. 1 is a schematic diagram of a fly ash high temperature melt processing system according to the present invention;
FIG. 2 is a schematic view of the natural gas nozzle in the combustion section of the present invention
FIG. 3 is a schematic diagram of a secondary combustion system according to the present invention;
FIG. 4 is a schematic view of the structure of the mixer of the present invention;
FIG. 5 is a schematic view of the structure of the feeding platform of the present invention;
FIG. 6 is a schematic view of a melting furnace according to the present invention;
FIG. 7 is a schematic diagram of a preheating device according to the present invention;
fig. 8 is a schematic structural view of a rotating device according to the present invention.
Reference numerals: 1. a melting furnace; 2. a water-cooling fence; 3. a melting section; 4. a combustion section; 5. a slag bath; 6. a natural gas nozzle; 7. a melting liquid outlet tank; 8. a liquid outlet hole; 9. an overflow trough; 10. a feed inlet; 11. a feeding platform; 12. a feeding device; 13. a pressing device; 14. a feed hopper; 15. a cyclone dust removal device; 16. a flue pipe; 17. a discharge pipe; 18. a return pipe; 19. a mixer; 20. an air supplementing pipe; 21. an air return pipe; 22. a sedimentation bin; 23. a heating bin; 24. a secondary combustion bin; 25. an exhaust pipe; 26. an air return pipe; 27. a first hybrid network; 28. an inclined surface; 29. a heating gun; 30. a second mixing net; 31. a heat recovery cover; 32. a heat recovery tube; 33. a throat; 34. an injection end; 35. an output end; 36. a mixing chamber; 37. a mixing hole; 38. a reflow hole; 39. a necking pipe; 40. a pushing rod; 41. a pushing plate; 42. a striker plate; 43. a fixing plate; 44. a tension spring; 45. a safety hole; 46. a safety valve; 47. a support frame; 48. a slide bar; 49. a spring; 50. a preheating device; 51. a pre-heat cover; 52. a necking section; 53. a flaring section; 54. an air duct; 55. preheating the gap; 56. a pre-heating coil; 57. fixing the screen plate; 58. a movable screen plate; 59. screening holes; 60. a rotating device; 61. a rotation shaft; 62. a water pipe; 63. a rotating chamber; 64. rotating the paddle; 65. a blower.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The embodiment discloses a high-temperature melting treatment system for fly ash, referring to fig. 1-6, the treatment system comprises three subsystems, namely a melting system, a feeding system and an exhaust gas treatment system, wherein the system supplies fly ash materials to the melting system through the feeding system, and then the melting system burns the fly ash materials at high temperature to form molten glass bodies, and then the molten glass bodies are recycled; and the waste gas generated in the burning process of the melting system is treated by the waste gas treatment system to realize waste gas treatment.
The melting system comprises a melting furnace 1, wherein a water-cooling fence 2 is arranged at the lower part of the melting furnace 1, the lower end of the melting furnace 1 is divided into an upper melting section 3 and a lower combustion section 4 by the water-cooling fence 2, a slag groove 5 is formed at the bottom of the melting furnace 1, one side of the slag groove 5 is connected with a melting liquid outlet groove 7, the slag groove 5 and the melting liquid outlet groove 7 are communicated through a liquid outlet hole 8, an overflow groove 9 is formed at the upper side of the melting liquid outlet groove 7, fly ash materials are supported in the melting section 3 by the melting furnace 1, the melting section 3 is burnt at a high temperature, the melting furnace 1 is heated from the lower side in the interior, the fly ash materials at the upper part of a gas supplementing pipe 20 are burnt and heated to about thousand hundred DEG C, so that glass residues fall into the slag groove 5 from the gap of the water-cooling fence 2, impurities at the lower layer are precipitated into the lower layer, glass bodies with cleaner upper layers flow into the melting liquid outlet groove 7 from the liquid outlet hole 8, and are output from the overflow groove 9 at the upper side of the melting liquid outlet groove 7, and glass bodies are produced and can be processed through centrifugal cotton to form heat preservation.
As shown in fig. 2, four to six natural gas nozzles 6 are arranged on the outer side of the combustion section 4, the natural gas nozzles 6 are distributed in an annular array, each natural gas nozzle 6 is in a fifteen-degree state, the positions of the natural gas nozzles 6 are in an eccentric state, natural gas flames sprayed out of the natural gas nozzles 6 form a vortex-shaped structure to form annular air flow of the flames, the fly ash materials on the upper layer of the water-cooling fence 2 can be rapidly heated and burned, annular heating air flow is formed in the melting section 3, and the heating time and heating uniformity of the air flow on the fly ash materials can be prolonged.
In order to realize the safety of high-temperature incineration of a melting system, a safety pressure relief structure is arranged at the upper end of the melting furnace 1, and when the pressure in the melting furnace 1 suddenly rises, the pressure relief can be carried out, so that the safety of the melting furnace 1 is improved; the upper end of the melting furnace 1 is provided with a safety hole 45 with a pressure relief opening, the upper part of the safety hole 45 is provided with a lifting movable safety valve 46, the upper part of the safety valve 46 is fixedly connected with a slide bar 48 and is supported by a support frame 47, the slide bar 48 stretches into the support frame 47 to form a lifting sliding structure, a spring 49 is elastically pressed between the support frame 47 and the safety valve 46, the spring 49 can downwards push the safety valve 46 through elastic pressure, and the pressure relief opening on the safety hole 45 can be blocked; the safety valve 46 can be lifted upwards by the phenomenon that the natural gas knocks during combustion or ignition by the spring against the pressure generated by combustion inside the melting furnace 1, and the pressure can be removed, so that the stability of the pressure inside the melting furnace 1 is ensured, and the safety of the melting furnace 1 is maintained.
Because the temperature can be increased drastically in the high-temperature incineration process, in order to ensure the structural stability and strength of the water-cooling fence 2, the water-cooling fence 2 can adopt a plurality of hollow carbon steel water pipes, a gap of about 5cm is formed between adjacent carbon steel water pipes, and fly ash material particles can be borne on the upper part of the water-cooling fence 2; and the two ends of the carbon steel water pipe are communicated with a cooling liquid source, the circulation of the cooling liquid is realized through the transportation of a circulating pump, and the cooling of the carbon steel water pipe is realized to avoid the melting damage caused by the overhigh temperature of the water-cooling fence 2.
On one hand, glass fluid falling downwards is formed in high-temperature incineration and melting in the melting furnace 1, and on the other hand, burnt smoke is formed, so that a smoke pipe 16 is connected to one side of the upper part of the melting furnace 1 for discharging the smoke, and then the smoke enters a waste gas treatment system for treating the smoke; and a feed inlet 10 is formed on the other side of the upper part of the melting furnace 1, a feeding system is arranged on the outer side of the feed inlet 10, fly ash material particles are conveyed into the melting furnace 1 through the feeding system, and then the materials are burnt at a high temperature.
The feeding system can process and convey fly ash materials, and then the fly ash materials are input into the melting furnace 1 from the upper part of the feeding platform 11; as shown in fig. 5, the feeding system comprises a feeding platform 11, a feeding device 12 and a pressing device 13, wherein the pressing device 13 can mix fly ash waste and other raw materials and extrude the fly ash waste into fly ash material particles; the feeding device 12 can convey the fly ash material particles upwards in an inclined way and convey the fly ash material particles to the feeding platform 11; a feed hopper 14 is arranged on the upper side of the feed platform 11, and the materials conveyed upwards from the feeding device 12 fall onto the feed platform 11 from the feed hopper 14 and then fall into the melting furnace 1 from the feed inlet 10;
the height of the feeding platform 11 is basically consistent with that of the feeding port 10, and the feeding platform 11 is inclined downwards towards one side, and the inclined downwards side is communicated with the feeding port 10; the material at the upper part of the feeding platform 11 is pushed by a pushing mechanism, the pushing mechanism comprises a pushing rod 40 and a pushing plate 41, the pushing plate 41 is fixedly arranged at the output end of the pushing rod 40, the pushing rod 40 is vertically arranged at the upper part of the feeding platform 11, the lower end of the pushing rod is close to the upper surface of the feeding platform 11, the pushing plate 41 can be driven to move forwards and backwards through the expansion and contraction of the pushing rod 40, and fly ash material particles on the feeding platform 11 are pushed into the melting furnace 1 from the feeding hole 10; and because the feed platform 11 becomes about fifteen degrees inclination to the fly ash material granule that feed platform 11 slided into to feed inlet 10 throws into certain inclination, and has certain initial velocity, thereby can fall into the central point of melting furnace 1 put, and most material can throw to the central point on the water-cooling fence 2 put, and make natural gas nozzle 6 can evenly fully heat fly ash material granule in the intermediate position of burning section 4, thereby ensure high temperature incineration's homogeneity and effectiveness.
In order to avoid blocking the feed inlet 10 due to the negative pressure formed in the melting furnace 1 during the incineration process in the melting furnace 1, the feed inlet 10 can be blocked by the baffle plate 42, so that the safety of the feed inlet 10 is maintained; the upper side of the feeding device 12 is rotationally connected with the side edge of the feeding hole 10, a fixed plate 43 is fixed on the outer side of the upper part of the feeding hole 10, and a tension spring 44 is connected between the fixed plate 43 and the striker plate 42; in the process that each time the pushing rod 40 is produced to drive the pushing plate 41 to push the material on the feeding platform 11 to enter the feeding hole 10, the pushing plate 41 can push the baffle plate 42, the baffle plate 42 rotates and swings towards the inner side of the feeding hole 10, the feeding hole 10 is opened, and fly ash material particles can fall into the melting furnace 1 from the feeding hole 10; then the pushing rod 40 drives the pushing plate 41 to retract, the tension spring 44 elastically returns to restore the position of the baffle plate 42, and the feed inlet 10 is plugged again, so that the safety and stability of the feed inlet 10 are maintained.
The waste gas treatment system comprises a cyclone dust removing device 15 and a secondary combustion system, wherein an air inlet at the upper side of the cyclone dust removing device 15 is connected with a flue gas pipe 16, the lower end of the cyclone dust removing device 15 is communicated with the melting furnace 1 through a return pipe 18, and a discharge outlet at the upper side of the cyclone dust removing device 15 is connected with the secondary combustion system through a discharge pipe 17; the flue gas discharged from the flue gas pipe 16 generates rotary motion in the cyclone dust collector 15, and the flue gas rotates along the inner wall of the cyclone dust collector 15 from top to bottom; the dust particles which are not completely melted in the flue gas are separated from the air flow under the action of centrifugal force, fall into an ash bucket along the wall under the action of gravity, are discharged from an ash discharge port at the lower end of the cyclone dust collector 15, and are returned to the melting section 3 of the melting furnace 1 again from the return pipe 18, and are burnt at a high temperature again through the high temperature in the melting section 3, so that the burning and melting are more sufficient; the gas separated by the particles is discharged upwards from the discharge port along the rotation of the discharge pipe, then is discharged into the secondary combustion system from the discharge pipe 17, and is subjected to high-temperature treatment again, so that harmful substances such as dioxin and the like in the flue gas are eliminated.
In the waste gas treatment system, the secondary combustion system mainly comprises a sedimentation bin 22, a heating bin 23 and a secondary combustion bin 24 which are connected from bottom to top, a discharge pipe 17 contacted with a discharge port at the upper side of the cyclone dust collector 15 is communicated with the outer side of the sedimentation bin 22, gas discharged from the upper side of the cyclone dust collector 15 is input into the sedimentation bin 22, then the flue gas rises from the inner part of the sedimentation bin 22 from top to bottom, and the high-temperature heating treatment is continued through high temperature in the rising process, so that harmful substances in the gas are eliminated;
the first mixing net 27 is arranged in the sedimentation bin 22, the second mixing net 30 is arranged in the second combustion bin 24, and the first mixing net 27 and the second mixing net 30 have larger surface areas, so that the gas can be fully heated when the gas passes through, and the high-temperature treatment efficiency of the gas is improved; an inclined surface 28 is arranged at one side of the joint of the interior of the sedimentation bin 22, which is opposite to the discharge pipe 17, and flue gas enters the sedimentation bin 22 from the discharge pipe 17, and a spray pile is generated with the inclined surface 28, and then the flue gas is directly input into the heating bin 23 and the secondary combustion bin 24 upwards, so that the circulation path of the flue gas in the sedimentation bin 22 can be improved;
the diameter of the heating bin 23 is smaller than that of the sedimentation bin 22 and the secondary combustion bin 24, a plurality of heating guns 29 are arranged outside the heating bin 23, and flue gas in the heating bin 23 can be further heated through the heating guns 29, so that high-temperature treatment is carried out on dioxin in the flue gas, and harmful substances in the flue gas are further eliminated; the diameter of a secondary combustion bin 24 connected with the upper part of the heating bin 23 is larger than that of a sedimentation bin 22, an exhaust pipe 25 for directly discharging the flue gas to a subsequent treatment system is connected with the top of the secondary combustion bin 24, a heat recovery cover 31 is arranged in the secondary combustion bin 24, the heat recovery cover 31 is in a leak-shaped structure, the upper end of the heat recovery cover 31 is open, a mixing net II 30 is covered on the outer side of the heat recovery cover 31, and the flue gas can enter from the interior of the secondary combustion bin 24; the lower end of the heat recovery cover 31 is connected with a heat recovery pipe 32, the lower end of the heat recovery pipe 32 sequentially passes through the heating bin 23 and the sedimentation bin 22, and extends out of the lower end of the sedimentation bin 22 and is connected with an air return pipe 21, and the other end of the air return pipe 21 is communicated with the melting section 3; the fan 65 is arranged on the air return pipe 21, the air flow in the air return pipe 21 can be driven to be conveyed to the middle of the melting section 3 through the fan 65, and the heat recovery cover 31 is used for pumping the high-temperature air in the secondary combustion chamber 24 into the melting section 3 again to be replenished into the melting section 3 for high-temperature heating, so that the processing efficiency and the full degree of dioxin are improved.
The return air pipe 21 and the return pipe 18 are communicated through the mixer 19 and then are communicated with the outer wall of the melting furnace 1, so that the circulating return of the flue gas is realized; wherein the whole mixer 19 is in a tubular structure which is communicated from front to back, the front end and the rear end of the mixer 19 are connected into an air return pipe 21, and the other end of the air return pipe 21 is connected to the peripheral wall of the melting furnace 1 to form a main pipeline which circulates into the melting furnace 1; the inside of the mixer 19 is provided with a throat pipe 33 with two large ends and a small middle part, an injection end 34 and an output end 35 of the throat pipe 33 are respectively connected with the inner wall of the mixer 19, an annular mixing cavity 36 is formed between the throat pipe 33 and the peripheral wall of the mixer 19, a plurality of mixing holes 37 are formed in the periphery of the middle section of the throat pipe 33, and then the outer side of the mixing cavity 36 is connected with an air supplementing pipe 20, wherein the air supplementing pipe 20 is used for being connected with an external air source; when the circulating flue gas in the air return pipe 21 is input into the mixer 19, flows in the throat pipe 33 in the mixer 19, the throat pipe 33 is in a reduced shape, the pipe diameter in the middle is reduced, the flow rate of the gas at the small diameter position of the throat pipe 33 is increased, the pressure is reduced along with the flow rate, and an inward negative pressure is generated in the mixing cavity 36 at the periphery of the throat pipe 33, so that the air is sucked into the throat pipe 33 through the air supplementing pipe 20 connected with the mixing cavity 36, the oxygen content in the flue gas is increased, the air is preheated in advance in the throat pipe 33 through the circulating flue gas, and then the fly ash is supplemented with air by being input into the melting section 3 of the melting furnace 1 from the tail end of the air return pipe 21;
a necking pipe 39 is also fixed in the middle of one side of the injection end 34 of the throat pipe 33, and the front end and the rear end of the necking pipe 39 are open and are consistent with the trend of the mixer 19; the inner diameter of the necking pipe 39 is in a structure with a small middle section and two large ends, a backflow hole 38 is formed in the small diameter position of the middle section of the necking pipe 39, the outer side of the backflow hole 38 is connected with the backflow pipe 18, and the other end of the backflow pipe 18 penetrates through the outer wall of the mixer 19 and is connected with a discharge outlet at the lower end of the cyclone dust collector 15; the circulating flue gas flowing at high speed in the mixer 19 can generate air flow in the mixer 19, when the air flows through the middle section of the mixer 19, the pressure in the mixer 19 is reduced after the pipe diameter is reduced, fly ash residues in the pipeline of the return pipe 18 are sucked into the second mixing net 30 in an accelerating way, are mixed and scattered along with the circulation of the circulating flue gas, sequentially pass through the mixer 19 along with the circulation of the circulating flue gas, and are input into the melting furnace 1 through the air return pipe 21 to perform the circulating incineration treatment on the flue gas particles, so that the fly ash can be fully incinerated and melted; in the process of circulating the fly ash residues and the flue gas into the throat 33, air is sucked from the air supplementing pipe 20 to form radial flow, and the air, the circulating flue gas and the fly ash residue particles are further and uniformly mixed, so that the temperatures of the air, the circulating flue gas and the fly ash residue particles are fully exchanged to form circulating fluid with uniform temperature, and the circulating fluid is circularly injected into the melting furnace 1 for incineration;
the tail end of the air return pipe 21 can be directly connected to the position of the melting section 3, and in order to improve the circulating flue gas input from the air return pipe 21 to be fully circulated and burnt in the melting furnace 1, the tail end of the air return pipe 21 can be connected to the outer side of the melting furnace 1 and introduced into the combustion section 4, the temperature in the combustion section 4 is higher, and the path passing through the high-temperature burning process of the fly ash can be further improved, so that the burning sufficiency of the fly ash is improved.
Example two
The embodiment discloses a high-temperature melting treatment system for fly ash, which is based on the first embodiment, and further optimizes the circulating reflux incineration treatment of the flue gas in a melting furnace 1 by referring to fig. 7 and 8;
a preheating device 50 is fixed in the melting section 3 of the melting furnace 1, the preheating device 50 is in a cylindrical structure, specifically, the preheating device 50 comprises a preheating cover 51 with the outer diameter slightly smaller than that of the melting section 3, the preheating cover 51 is fixed on the inner wall of the melting section 3 through a supporting frame, a necking section 52 with the diameter gradually reduced is formed at the upper end of the preheating cover 51, and a flaring section 53 with the diameter slightly enlarged is connected at the upper end of the necking section 52; an air duct 54 is sleeved in the preheating cover 51, and the air duct 54 is fixed on the inner wall of the preheating cover 51 through a supporting frame; a preheating gap 55 is formed between the air duct 54 and the preheating cover 51, the return pipe 18 extends into the melting section 3 and is communicated with the preheating gap 55, and circulating smoke in the return pipe 21 can be input into the preheating gap 55 to be sufficiently heated at high temperature in the preheating gap 55; a plurality of preheating coils 56 distributed from top to bottom are arranged in the preheating gap 55, and the preheating coils 56 can form sufficient air heat exchange in the preheating gap 55 and are blocked by the necking sections 52 in the rising process, and continuously fall from the lower end of the preheating gap 55 to the water-cooling fence 2 for burning, so that the burning and melting effects of fly ash are improved;
the fly ash material particles heated from the feed inlet 10 on the upper side of the melting furnace 1 fall from the center of the upper part of the flaring section 53 and pass through the air duct 54; a fixed screen plate 57 is fixedly connected to the lower end of the preheating cover 51, fly ash material particles are supported, a movable screen plate 58 is rotatably connected to the upper part of the fixed screen plate 57, and the movable screen plate 58 is driven to rotate by a rotating device 60; a plurality of screening holes 59 are formed in the positions corresponding to the fixed screen plate 57 and the movable screen plate 58, and the screening holes 59 can be penetrated by fly ash material particles; the edges of the fixed screen plate 57 are also provided with the screen holes 59, the middle of the movable screen plate 58 is in a bulge-shaped structure, in the rotating process of the rotating device 60 driving the movable screen plate 58, fly ash material particles on the upper side of the movable screen plate 58 can move outwards to the edges of the movable screen plate 58, so that the fly ash material particles can uniformly spread downwards from among the screen holes 59 and then uniformly fall onto the upper layer of the water-cooling fence 2, a gap is formed between the upper part of the movable screen plate 58 and the lower end of the air duct 54, in the further outwards moving process, part of the fly ash material particles can fall from the gap and then fall from the screen holes 59 on the outer side of the fixed screen plate 57, and uniform high-temperature incineration can be performed on the upper layer of the water-cooling fence 2, so that the uniformity of high-temperature incineration at the melting section 3 is improved.
The movable sieve plate 58 is driven to rotate by the rotating device 60, the rotating device 60 comprises a hollow rotating cavity 63, rotating blades 64 are rotatably connected in the rotating cavity 63, a rotating shaft 61 is fixedly connected to the upper ends of the rotating blades 64, the upper ends of the rotating shafts 61 extend out of the rotating cavity 63 and are fixedly connected with the movable sieve plate 58, and the extending positions of the rotating shafts 61 are sealed by high-temperature-resistant sealing elements, so that the rotating blades 64 and the movable sieve plate 58 can be kept to synchronously rotate; one side of the rotating cavity 63 is connected with an eccentrically arranged water pipe 62, cooling water can be circularly input into the water pipe 62, and the rotating blades 64 are pushed to rotate by the cooling water, so that the movable sieve plate 58 is driven to rotate, and fly ash material particles on the upper side of the movable sieve plate 58 can be uniformly dispersed; the cooling liquid can cool the whole rotating device 60 in the driving process, and the scattering uniformity of fly ash material particles can be improved in the driving process of the rotating device 60.
Example III
The embodiment discloses a high-temperature melting recycling treatment process for fly ash, which adopts the high-temperature melting treatment system for the fly ash in the embodiment to process, can burn fly ash waste at high temperature to form molten glass, processes the solution into fibers through centrifugal processing, solidifies and processes the fibers into heat-insulating cotton, and forms waste recycling of the fly ash waste;
(1) Granulating the fly ash: uniformly stirring and mixing the fly ash raw material and Portland cement semi-wet, pressing into fly ash material particles with the particle size of 80-100mm, and naturally drying in the shade for 3-5 days for later use;
(2) High-temperature melting: the fly ash material particles after being dried in the shade are sent to the melting furnace body through the feeding system, and before and after the feeding, the feeding opening is kept safely sealed through the sealing structure of the feeding opening, so that tempering is prevented; then incinerating and melting the fly ash in the melting furnace body through natural gas; controlling the melting temperature in the melting furnace body to 1600-1700 ℃ so that the fly ash is melted to form a melt, and burning impurities in fly ash material particles to form dust tail gas; the filling coefficient of the material quantity of the melting section of the melting furnace body is controlled to be less than 70% in the burning process;
(3) And (3) reprocessing: discharging the melt formed in the high-temperature melting process, centrifuging the melt into fibers by a centrifuge, and preparing heat-insulating cotton by a cotton collecting pendulum, solidification treatment and cutting to realize the recycling of fly ash;
(4) Tail gas treatment: separating dust tail gas discharged from the upper end of the melting furnace through a cyclone dust collector to form solid fly ash residue powder and combustion tail gas, and discharging the fly ash residue powder into the melting furnace again for cyclic incineration; the combustion tail gas enters a secondary combustion system, organic pollutants such as dioxin and the like in the combustion tail gas are further incinerated and removed by continuous heating, and then other pollutants in the tail gas are treated by dry denitration process treatment, cloth bag dust removal treatment and washing tower deacidification treatment.
In the combustion high-temperature melting process, the heat balance calculation is carried out at the following 1t/h, and the control parameters are as follows:
(1) High temperature melting furnace operating environment conditions:
a: average atmospheric pressure: po=101.6 kpa;
b: annual average air temperature: 16.2 ℃, outside ambient temperature: 25 ℃;
c: furnace temperature of high-temperature melting furnace body: 1600-1700 ℃, and the temperature in a secondary combustion system: the residence time of the flue gas in the secondary combustion system is about 3-10s at 1100-1200 ℃, and the purpose of adopting the design is to ensure that the removal rate of dioxin in hazardous waste is more than 99.99%.
(2) High temperature melting fly ash case:
a: treatment amount: m=835 Kg/h;
b: design value of chemical composition of high temperature melt: caO:49.69%; siO (SiO) 2 ：5.59％；Al 2 O 3 ：1.31％；Cl：26.23％；Fe 2 O 3 :1.10%; mgO:0.86%; other: 15.22%.
(3) Heat balance and main technical parameters of the system:
air quantity, smoke quantity, peroxy amount and smoke resistance at different temperatures and same excess air coefficient (residual oxygen 6%):
high temperature melting furnace body heat calculation result
And (3) carrying out tail gas treatment on the discharged tail gas after the secondary combustion system, and treating various pollutants in the tail gas through dry denitration process treatment, cloth bag dust removal treatment and washing tower deacidification treatment.
Thermal calculation results of dry processor
Bag-type dust collector (ventilation area 400 m) 2 ) Results of thermal calculations
| Flue gas inlet temperature | 190℃ | Concentration of dust at outlet | 14mg/Nm 3 |
| Flue gas outlet temperature | 175℃ | Dust removal efficiency | More than 99.9% |
| Resistance to smoke | 2000Pa | Outlet smoke volume | 4400Nm 3 /h |
| Inlet dust concentration | 120mg/Nm 3 | Ash discharge amount | 0.79Kg/h |
Results of thermal calculations for a scrubber
| Flue gas inlet temperature | 165℃ | Concentration of dust at outlet | 20mg/Nm 3 |
| Flue gas outlet temperature | 80℃ | Deacidification efficiency | More than 95% |
| Resistance to smoke | 1200Pa | Outlet smoke volume | 4400Nm 3 /h |
| Inlet dust concentration | 14mg/Nm 3 | Speed of empty tower | 1.2m/s |
| Circulating water volume | 70t/h | Consumption of water | 350Kg/h |
| Diameter of the washing tower | 4.2m | Effective height of | 10m |
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (5)
1. The fly ash high-temperature melting treatment system is characterized by comprising a melting system, a feeding system and an exhaust gas treatment system, wherein the melting system comprises a melting furnace (1), a water cooling fence (2) is arranged at the lower part of the melting furnace (1), the upper part of the water cooling fence (2) is a melting section (3), the lower part of the water cooling fence is a combustion section (4), a slag groove (5) is arranged at the bottom of the melting furnace (1), a melting liquid outlet groove (7) with an overflow groove (9) is arranged at one side of the slag groove (5), and the slag groove (5) and the melting liquid outlet groove (7) are communicated through a liquid outlet hole (8); the outside of the combustion section (4) is provided with a plurality of natural gas nozzles (6) distributed in an annular array, and the natural gas nozzles (6) are obliquely downward and eccentrically arranged; a flue gas pipe (16) and a feed inlet (10) are arranged at the upper part of the melting furnace (1);
the waste gas treatment system comprises a cyclone dust removing device (15) and a secondary combustion system, wherein the upper side of the cyclone dust removing device (15) is communicated with a melting furnace (1) through a flue pipe (16), the upper end of the cyclone dust removing device (15) is connected with a discharge pipe (17), the lower end of the cyclone dust removing device is communicated with a melting section (3) of the melting furnace (1) through a return pipe (18), a mixer (19) is arranged between the return pipe (18) and the melting furnace (1), the secondary combustion system comprises a sedimentation bin (22), a heating bin (23) and a secondary combustion bin (24) which are connected from bottom to top, and the tail end of the discharge pipe (17) is communicated with the outer side of the sedimentation bin (22);
the diameter of the heating bin (23) is smaller than that of the sedimentation bin (22) and the secondary combustion bin (24), a plurality of heating guns (29) are arranged outside the heating bin (23), a first mixing net (27) is arranged inside the sedimentation bin (22), a second mixing net (30) is arranged inside the secondary combustion bin (24), the sedimentation bin (22) comprises an inclined surface (28) which is opposite to the connecting part of the discharge pipe (17), a large-top-small funnel-shaped heat recovery cover (31) is arranged inside the secondary combustion bin (24), the lower end of the heat recovery cover (31) is connected with a heat recovery pipe (32), the lower end of the heat recovery pipe (32) sequentially penetrates through the heating bin (23) and the sedimentation bin (22), a gas return pipe (21) extends out from the lower end of the sedimentation bin (22), and the other end of the gas return pipe (21) is communicated with the melting section (3); a fan (65) is arranged on the air return pipe (21);
the front end and the rear end of the mixer (19) are connected with air return pipes (21), a throat pipe (33) with two large ends and a small middle end is arranged in the mixer (19), an injection end (34) and an output end (35) of the throat pipe (33) are respectively connected with the inner wall of the mixer (19), an annular mixing cavity (36) is formed between the throat pipe (33) and the peripheral wall of the mixer (19), the outer side of the mixing cavity (36) is connected with an air supplementing pipe (20), the air supplementing pipe (20) is used for being connected with an external air source, and a plurality of mixing holes (37) are formed in the middle section of the throat pipe (33);
a necking pipe (39) is fixed in the middle of one side of an injection end (34) of the throat pipe (33), the inside diameter of the necking pipe (39) is of a structure with a small middle and two large ends, a backflow hole (38) is formed in the middle section of the necking pipe (39), and the outer side of the backflow hole (38) is connected with a backflow pipe (18);
the inside of melting section (3) is provided with preheating device (50), preheating device (50) are including preheating cover (51) that the external diameter is slightly less than melting section (3), the upper end of preheating cover (51) sets up throat section (52), and the upper end of throat section (52) sets up flaring section (53), air duct (54) are established to the inside cover of preheating cover (51), form preheating gap (55) between air duct (54) and preheating cover (51), the inside of preheating gap (55) is provided with a plurality of pre-heating coils (56) that top-down distributes, back flow (18) stretch into melting section (3) and with preheating gap (55) intercommunication.
2. A fly ash high temperature melt processing system according to claim 1, characterized in that the water cooling fence (2) comprises a plurality of hollow carbon steel water pipes, which are communicated with a cooling liquid source for realizing circulating cooling.
3. The fly ash high-temperature melting treatment system according to claim 1, wherein a safety hole (45) is formed in the upper end of the melting furnace (1), a safety valve (46) for blocking the safety hole (45) is arranged on the upper portion of the safety hole (45), a sliding rod (48) is connected to the upper portion of the safety valve (46), the sliding rod (48) is slidably supported through a supporting frame (47), and a spring (49) is elastically pressed between the supporting frame (47) and the safety valve (46).
4. The fly ash high-temperature melting treatment system according to claim 1, wherein the feeding system comprises a feeding platform (11), a feeding device (12) and a pressing device (13), a feeding hopper (14) is arranged on the upper side of the feeding platform (11), the feeding platform (11) is connected with the feeding hole (10) and inclines downwards towards one side of the feeding hole (10), the lower end of the feeding device (12) is connected with the pressing device (13), the upper end of the feeding device is connected with the feeding hopper (14), a pushing rod (40) is arranged on the upper portion of the feeding platform (11), a pushing plate (41) is arranged at the output end of the pushing rod (40), and the pushing plate (41) is used for pushing materials into the feeding hole (10).
5. The fly ash high-temperature melting treatment system according to claim 4, wherein a feeding device (12) for blocking is arranged at the feeding hole (10), the upper side of the feeding device (12) is rotationally connected with the feeding hole (10), a fixing plate (43) is fixed on the outer side of the upper part of the feeding hole (10), and a tension spring (44) is connected between the fixing plate (43) and the baffle plate (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111082410.1A CN113701163B (en) | 2021-09-15 | 2021-09-15 | Fly ash high-temperature melting treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111082410.1A CN113701163B (en) | 2021-09-15 | 2021-09-15 | Fly ash high-temperature melting treatment system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113701163A CN113701163A (en) | 2021-11-26 |
| CN113701163B true CN113701163B (en) | 2024-03-26 |
Family
ID=78660922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111082410.1A Active CN113701163B (en) | 2021-09-15 | 2021-09-15 | Fly ash high-temperature melting treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113701163B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114602954A (en) * | 2022-03-18 | 2022-06-10 | 苏州乔发环保科技股份有限公司 | Fly ash recycling treatment method |
| CN114777507B (en) * | 2022-04-26 | 2024-04-16 | 浙江伊诺环保集团股份有限公司 | Fly ash jetting circulation combustion system |
| CN114992626A (en) * | 2022-04-26 | 2022-09-02 | 浙江伊诺环保科技股份有限公司 | Secondary injection combustion device for capturing and recovering fly ash |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106524176A (en) * | 2016-12-30 | 2017-03-22 | 重庆科技学院 | Waste gasification melting combustion system |
| CN107726325A (en) * | 2017-11-14 | 2018-02-23 | 大连易舜绿色科技有限公司 | To handle the fusion apparatus of waste and waste treatment method |
| CN108613199A (en) * | 2018-07-05 | 2018-10-02 | 上海环境工程设计研究院有限公司 | A kind of dangerous waste incineration melting integrated apparatus |
| CN110551529A (en) * | 2019-09-03 | 2019-12-10 | 中国科学院工程热物理研究所 | Gasification fly ash recycling treatment and heat energy recycling system and method |
| CN112555850A (en) * | 2020-12-08 | 2021-03-26 | 重庆科技学院 | System for melting and treating waste incineration fly ash by utilizing waste heat of liquid blast furnace slag |
| CN112815717A (en) * | 2020-12-28 | 2021-05-18 | 航天推进技术研究院 | Plasma melting furnace |
-
2021
- 2021-09-15 CN CN202111082410.1A patent/CN113701163B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106524176A (en) * | 2016-12-30 | 2017-03-22 | 重庆科技学院 | Waste gasification melting combustion system |
| CN107726325A (en) * | 2017-11-14 | 2018-02-23 | 大连易舜绿色科技有限公司 | To handle the fusion apparatus of waste and waste treatment method |
| CN108613199A (en) * | 2018-07-05 | 2018-10-02 | 上海环境工程设计研究院有限公司 | A kind of dangerous waste incineration melting integrated apparatus |
| CN110551529A (en) * | 2019-09-03 | 2019-12-10 | 中国科学院工程热物理研究所 | Gasification fly ash recycling treatment and heat energy recycling system and method |
| CN112555850A (en) * | 2020-12-08 | 2021-03-26 | 重庆科技学院 | System for melting and treating waste incineration fly ash by utilizing waste heat of liquid blast furnace slag |
| CN112815717A (en) * | 2020-12-28 | 2021-05-18 | 航天推进技术研究院 | Plasma melting furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113701163A (en) | 2021-11-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113701163B (en) | Fly ash high-temperature melting treatment system | |
| CN113798307B (en) | Treatment process for recycling fly ash through high-temperature melting | |
| CN1759941B (en) | New type heating and fusing method and equipment for dealing with flying ash generated by burning garbage | |
| CN100458284C (en) | Complete equipment for cremating waste and method for comprehensive utilization of waste | |
| US4753181A (en) | Incineration process | |
| CN208162277U (en) | A kind of thermal desorption system of contaminated soil | |
| CN100357663C (en) | Incinerator for dust separation and rubbish pyrolysis | |
| JP2011527236A (en) | Multistage heating zone gasifier | |
| CN113310056A (en) | Hazardous waste incineration treatment system and method | |
| CN105371283A (en) | Sludge drying and incinerating process | |
| US5052313A (en) | Waste treatment system and method | |
| JP3847777B1 (en) | Asbestos melt processing equipment | |
| CN105546549A (en) | Trash dechlorination device and method | |
| JPH0691244A (en) | Method and device for forming harmless nodular mass using harmful waste | |
| CN216159615U (en) | Fly ash high-temperature melting furnace | |
| CN1748115A (en) | Oven | |
| CN106082576A (en) | A kind of low temperature continuous pyrolysis processes mud fixed bed reactors and method | |
| JP3460605B2 (en) | Waste incineration and heat treatment furnace | |
| CN205174379U (en) | Drying combustion system | |
| CN105674272B (en) | A kind of compound incinerator of silicon porcelain fire grate and its handling process | |
| CN114656169A (en) | Preheating tower for calcium oxide production | |
| WO2020108432A1 (en) | Vortex machine | |
| WO2000022348A1 (en) | Waste disposal device | |
| KR950013974B1 (en) | Method and apparatus for using hazardous waste to form no-hazardous aggregate | |
| CN218328173U (en) | Waste incineration fly ash melting furnace |
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 | ||
| CB02 | Change of applicant information |
Address after: Room 5003, 5th Floor, Building 4, West Side of Zhongxing Avenue (Chang'er Village), Doumen Street, Yuecheng District, Shaoxing City, Zhejiang Province, 312000 Applicant after: Zhejiang Yinuo Environmental Protection Group Co.,Ltd. Address before: 312000 room 2204, Huaxin Building, Doumen street, Yuecheng District, Shaoxing City, Zhejiang Province Applicant before: ZHEJIANG ENO ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |