CN117231988B - Synchronous-feeding continuous dangerous waste feeding cement kiln incineration device and process - Google Patents
Synchronous-feeding continuous dangerous waste feeding cement kiln incineration device and process Download PDFInfo
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- CN117231988B CN117231988B CN202311186714.1A CN202311186714A CN117231988B CN 117231988 B CN117231988 B CN 117231988B CN 202311186714 A CN202311186714 A CN 202311186714A CN 117231988 B CN117231988 B CN 117231988B
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- 239000004568 cement Substances 0.000 title claims abstract description 32
- 239000002699 waste material Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims description 10
- 230000008569 process Effects 0.000 title claims description 9
- 239000000463 material Substances 0.000 claims abstract description 119
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 230000001360 synchronised effect Effects 0.000 claims abstract description 20
- 238000007599 discharging Methods 0.000 claims abstract description 19
- 239000002920 hazardous waste Substances 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 9
- 229910001182 Mo alloy Inorganic materials 0.000 claims description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 239000011733 molybdenum Substances 0.000 claims description 6
- DDTIGTPWGISMKL-UHFFFAOYSA-N molybdenum nickel Chemical compound [Ni].[Mo] DDTIGTPWGISMKL-UHFFFAOYSA-N 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910000599 Cr alloy Inorganic materials 0.000 claims description 5
- 239000000788 chromium alloy Substances 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 239000010955 niobium Substances 0.000 claims description 3
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 3
- 238000011278 co-treatment Methods 0.000 abstract description 2
- 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 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 239000003245 coal Substances 0.000 description 5
- 238000007792 addition Methods 0.000 description 4
- 238000004939 coking Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention belongs to the technical field of cement kiln co-treatment of hazardous waste, and particularly relates to a synchronous feeding continuous hazardous waste feeding cement kiln incineration device, which comprises a furnace body, wherein the right side of the bottom of the furnace body is of a stepped structure, the uppermost end of the stepped structure is lower than the lower end of a feed inlet, the lowermost end of the stepped structure extends to a feed outlet, a pushing mechanism is arranged on each step in the stepped structure in a matched manner, and a controller controls each pushing mechanism to synchronously reciprocate left and right along the corresponding step; when each pushing mechanism synchronously moves leftwards along the corresponding step, the material on the corresponding step is pushed to the next step or the discharging opening, and when each pushing mechanism synchronously moves rightwards along the corresponding step, the newly fallen material on the corresponding step is scattered. The invention can mechanically break up materials and prevent dangerous waste from entering the decomposing furnace in lump after preheating and burning, and the problems of unstable furnace temperature in the decomposing furnace, easy generation of dioxin and influence on cement clinker quality caused by insufficient burning are avoided.
Description
Technical Field
The invention relates to a synchronous continuous dangerous waste feeding cement kiln incineration device and a synchronous continuous dangerous waste feeding cement kiln incineration process, and belongs to the technical field of cement kiln co-treatment of dangerous waste.
Background
For the cement kiln co-disposal hazardous waste technology, the biggest problem is the influence of hazardous waste to the thermal environment of the decomposing furnace when the hazardous waste enters the kiln. At present, most of the processes are to directly drive materials into a decomposing furnace through a conveying pump, and the materials are sticky and enter the decomposing furnace in a lump, so that the materials are not combusted sufficiently, the phenomenon of material collapse occurs, the yield and quality of cement kiln clinker are reduced, and cement center control operators have to immediately reduce the dangerous waste addition amount, so that the disposal capability of the decomposing furnace to dangerous waste is directly affected.
In order to solve the problems, a material scattering spray gun is designed at a kiln inlet, but the scattering spray gun does not achieve the expected material distribution effect and can only be idle in face of strict working condition requirements of a cement kiln.
In addition, there is cascaded precombustion stove still, and it adopts air cannon drive mode unloading, but dangerous waste has viscidity or colloid, hardly breaks up, and the unloading effect is not good moreover, has dangerous waste to exist on the ladder for a long time and burns the condition that forms the coking, and later stage hardly clears up, and if the clearance is untimely, the material that later stage got into can directly get into the decomposition stove along the coking layer, appears collapsing the material phenomenon because of burning insufficiently brings, can't play due precombustion effect.
Disclosure of Invention
The invention aims to solve the technical problems that the prior art has the defects, and provides a synchronous continuous dangerous waste feeding cement kiln incineration device and process.
The scheme is realized by the following technical measures: a synchronous continuous dangerous waste feeding cement kiln incinerator comprises
A furnace body;
the air guiding port is arranged on the right side of the top of the furnace body and is used for guiding tertiary air into the inner cavity of the furnace body to dry the materials;
the feeding port is arranged at the top of the right side of the furnace body and is used for throwing dangerous wastes into the inner cavity of the furnace body;
the hot air outlet is arranged at the upper end of the left side of the furnace body and is used for discharging hot air in the furnace body;
the discharging opening is positioned at the left side of the bottom of the furnace body and is used for discharging the pre-burning dangerous waste, the hot air outlet is separated from the discharging opening, and heat generated by tertiary air and dangerous waste combustion is sprayed out from the hot air outlet and goes upwards to drive the furnace temperature at the upper part of the furnace body to rise;
the right side of the bottom of the furnace body is of a stepped structure, the uppermost end of the stepped structure is lower than the lower end of the feeding hole, the lowermost end of the stepped structure extends to the blanking hole, a pushing mechanism is arranged on each step in the stepped structure in a matched mode, each pushing mechanism is respectively and electrically connected with a controller, and the controller controls each pushing mechanism to synchronously reciprocate left and right along the corresponding step;
when each pushing mechanism synchronously moves leftwards along the corresponding step, the material on the corresponding step is pushed to the next step or the discharging opening, and when each pushing mechanism synchronously moves rightwards along the corresponding step, the material newly falling down on the corresponding step is loosened and scattered.
Preferably, the pushing mechanism comprises a push rod and a push plate assembly fixedly connected with the push rod, the push rod penetrates through the furnace wall of the furnace body and is in sliding connection with the furnace wall of the furnace body, the outer side end of the push rod is fixedly connected with the end part of a piston rod of a hydraulic cylinder, the hydraulic cylinder is electrically connected with a controller, and the controller controls the hydraulic cylinder to drive the push rod to move left and right in a reciprocating manner.
Preferably, the push plate assembly comprises a push plate and a rake nail, the inner side of the push rod is fixedly connected with a main shaft, the upper end of the push plate is rotationally connected with the main shaft, the upper end of the rake nail is fixedly connected with the main shaft, and the push plate is arranged on the left side and the rake nail is arranged on the right side;
when the push rod moves leftwards, an included angle of 90 degrees is formed between the push plate and the push rod, an included angle of 0 degrees is formed between the push plate and the rake nail, and the material is pushed to the next step or the blanking hole by the push plate;
when the push rod is reset rightwards, the rake nails loosen and scatter materials which newly fall on the corresponding steps, and the materials push the push plate to rotate relative to the main shaft, so that an included angle of 45 degrees is formed between the push plate and the rake nails at maximum.
Preferably, the number ratio of push rods, push plates and rake nails in the pushing mechanism is 1:2:8,2 push plates are arranged side by side along the axial direction of the main shaft, and 8 rake nails are arranged side by side along the axial direction of the main shaft.
Preferably, the push plate and the harrow nail are made of refractory high-chromium alloy materials, the refractory high-chromium alloy materials consist of the following components in percentage by atom,
42 to 45 percent of chromium,
10-12% of nickel,
5-8% of molybdenum,
niobium 1%,
the balance of iron is iron,
the atomic percent sum of each component is 100 percent.
Preferably, the push rod is cast by adopting a heat-resistant nickel-molybdenum alloy material, the heat-resistant nickel-molybdenum alloy material consists of the following components in percentage by atom,
22.5 percent of nickel,
31.5 percent of molybdenum,
the balance of iron is iron,
the atomic percent sum of each component is 100 percent.
Preferably, the furnace wall of the furnace body is embedded and fixed with a guide ring, and the guide ring is made of the same material as the push rod, so that the guide ring and the push rod have a self-lubricating function under the friction of high temperature.
Preferably, the center lines of the air inlet and the feeding port are mutually perpendicular, and tertiary air is blown on the surface of the material horizontally entering from the feeding port from top to bottom through the air inlet.
Preferably, three steps are arranged in the stepped structure, and the top of the furnace body is of a fornix structure.
The invention also provides a synchronous continuous dangerous waste cement kiln incineration process based on the synchronous continuous dangerous waste cement kiln incineration device, which comprises the following steps:
s1: the material enters the uppermost step from the feed inlet, and tertiary air introduced by the air inlet is beaten on the surface of the material on the uppermost step from top to bottom, so that the surface of the material is dried;
s2: the piston rod of the hydraulic cylinder retracts and drives the push rod to move rightwards, the push rod drives the push plate and the rake nails to synchronously move rightwards through the main shaft, the rake nails loosen and scatter materials on the steps, the materials lift the lower end of the push plate upwards, the push plate rotates relative to the main shaft, and after the piston rod of the hydraulic cylinder resets, the push plate is separated from contact with the materials and resets to a vertical state under the action of self gravity;
s3: the piston rod of the hydraulic cylinder stretches out and drives the push rod to move leftwards, the push rod drives the push plate and the rake nail to synchronously move leftwards through the main shaft, the push plate pushes the material on the uppermost step to the second step, and meanwhile, new material enters the uppermost step from the feed inlet;
s4: the piston rod of the hydraulic cylinder retracts and drives the push rod to move rightwards, the push rod drives the push plate and the harrow nails to synchronously move rightwards through the main shaft, the harrow nails loosen and scatter materials on two corresponding steps above, the lower ends of the two push plates are lifted upwards by the materials, the push plate rotates relative to the main shaft, and after the piston rod of the hydraulic cylinder is reset, the push plate is separated from contact with the materials and is reset to a vertical state under the action of self gravity;
s5: the piston rod of the hydraulic cylinder stretches out and drives the push rod to move leftwards, the push rod drives the push plate and the rake nail to synchronously move leftwards through the main shaft, the corresponding push plate pushes materials on the uppermost step to the second step and pushes materials on the second step to the third step, and meanwhile, new materials enter the uppermost step from the feed inlet;
s6: the piston rod of the hydraulic cylinder retracts and drives the push rod to move rightwards, the push rod drives the push plate and the harrow nails to synchronously move rightwards through the main shaft, the harrow nails loosen and scatter materials on the corresponding three steps, the lower ends of the three push plates are lifted upwards by the materials, the push plate rotates relative to the main shaft, and after the piston rod of the hydraulic cylinder resets, the push plate is separated from contact with the materials and resets to a vertical state under the action of self gravity;
s7: the piston rod of the hydraulic cylinder stretches out and drives the push rod to move leftwards, the push rod drives the push plate and the rake nail to synchronously move leftwards through the main shaft, the corresponding push plate pushes materials on the uppermost step to the second step, pushes materials on the second step to the third step, pushes materials on the third step to the blanking port, and meanwhile, new materials enter the uppermost step from the feeding port;
s8: repeating steps S6-S7.
The invention has the beneficial effects that: according to the invention, the mechanical push rod with a certain frequency is used for discharging materials step by step, and meanwhile, the push rod is pulled back to loosen and scatter the materials on the steps, so that the pre-combustion of dangerous wastes is facilitated, and the influence on the decomposing furnace and the influence on the quality of cement clinker are reduced; the incoming materials are dried acutely by making the air inlet direction of the tertiary air and the feeding direction of the materials perpendicular; the hot air outlet and the blanking port are separated, so that heat generated by pre-burning hazardous waste is facilitated to be concentrated into the decomposing furnace, the addition of tail coal is reduced, and the coal saving effect is achieved. It can be seen that the present invention has outstanding substantial features and significant advances over the prior art, as well as the benefits of its implementation.
Drawings
FIG. 1 is a schematic diagram of a synchronous continuous hazardous waste feeding cement kiln incineration device.
Fig. 2 is a schematic structural view of a push plate assembly.
In the figure: the device comprises a 1-furnace body, a 2-decomposing furnace, a 3-hot air outlet, a 4-air guiding port, a 5-push rod, a 6-guide ring, a 7-hydraulic cylinder, an 8-main shaft, a 9-rake nail, a 10-push plate, an 11-push plate assembly, a 12-feed opening, a 13-step and a 14-feed opening.
Detailed Description
In order to clearly illustrate the technical characteristics of the present solution, the present solution is described below by means of specific embodiments and with reference to the accompanying drawings.
A synchronous continuous dangerous waste feeding cement kiln incinerator comprises
The top of the furnace body 1 is of a vault-shaped structure, so that heat enrichment is facilitated;
the air guiding port 4 is arranged on the right side of the top of the furnace body 1 and is used for guiding tertiary air into the inner cavity of the furnace body 1 to dry the materials;
the feed inlet 14 is arranged at the top of the right side of the furnace body 1 and is used for throwing dangerous waste into the inner cavity of the furnace body 1, the center lines of the air inlet 4 and the feed inlet 14 are mutually perpendicular, and tertiary air is beaten on the surface of a material horizontally entering from the feed inlet 14 from top to bottom through the air inlet 4, so that the surface of the material is quickly dried;
a hot air outlet 3 arranged at the upper end of the left side of the furnace body 1 and used for discharging hot air in the furnace body 1;
the discharging opening 12 is positioned at the left side of the bottom of the furnace body 1 and is used for discharging the pre-burning dangerous waste, the hot air outlet 3 is separated from the discharging opening 12, and heat generated by tertiary air and dangerous waste combustion is sprayed out from the hot air outlet 3 and goes upwards to drive the furnace temperature at the upper part of the furnace body 1 to be raised, so that the effect of saving the feeding amount of kiln tail fire coal is achieved.
The right side of the bottom of the furnace body 1 is of a stepped structure, preferably three steps 13 are arranged in the stepped structure, the uppermost end of the stepped structure is lower than the lower end of a feed inlet 14, the lowermost end of the stepped structure extends to a blanking opening 12, each step 13 in the stepped structure is provided with a pushing mechanism in a matched mode, each pushing mechanism is electrically connected with a controller, the controllers control the pushing mechanisms to synchronously reciprocate left and right along the corresponding steps 13, and different pushing speeds can be set according to the combustion characteristics of materials; the pushing speed of the pushing mechanism is high under the characteristics of high heat value and easy combustion of materials; the pushing speed of the pushing mechanism is low under the characteristics of low heat value and difficult combustion of materials.
When each pushing mechanism synchronously moves leftwards along the corresponding step 13, the material on the corresponding step 13 is pushed to the next step 13 or the discharging opening 12, and when each pushing mechanism synchronously moves rightwards along the corresponding step 13, the newly fallen material on the corresponding step 13 is scattered.
The pushing mechanism comprises a pushing rod 5 and a pushing plate assembly 11 fixedly connected with the pushing rod 5, the pushing rod 5 penetrates through the furnace wall of the furnace body 1 and is in sliding connection with the furnace wall of the furnace body 1, the outer side end of the pushing rod 5 is fixedly connected with the end part of a piston rod of a hydraulic cylinder 7, the hydraulic cylinder 7 is electrically connected with a controller, the controller controls the hydraulic cylinder 7 to drive the pushing rod 5 to reciprocate left and right, specifically, a guide ring 6 is embedded and fixed at the furnace wall of the furnace body 1, the guide ring 6 is made of the same material as the pushing rod 5, the guide ring 6 and the pushing rod 5 are made of the same friction materials at high temperature, the self-lubricating function is achieved, and the later maintenance cost can be reduced.
The push plate assembly 11 comprises a push plate 10 and a rake nail 9, the inner side of the push rod 5 is fixedly connected with a main shaft 8, the upper end of the push plate 10 is rotationally connected with the main shaft 8, the upper end of the rake nail 9 is fixedly connected with the main shaft 8, and the push plate 10 is arranged on the left and the rake nail 9 is arranged on the right; when the push rod 5 moves leftwards, an included angle of 90 degrees is formed between the push plate 10 and the push rod 5, an included angle of 0 degrees is formed between the push plate 10 and the rake nails 9, the rake nails 9 can block and limit the push plate 10, and materials are pushed to the next step 13 or the discharging opening 12 by the push plate 10; when the push rod 5 resets rightwards, the rake nail 9 starts to work, the rake nail 9 loosens and breaks up the material which is newly fallen on the corresponding step 13 (the material pushed down on the last step 13 or the material which is newly entered from the feed inlet 14), and the material pushes the push plate 10 to rotate relative to the main shaft 8, so that an included angle of 45 degrees is formed between the push plate 10 and the rake nail 9 at maximum. In the pushing mechanism, the number ratio of push rods 5 to push plates 10 to rake nails 9 is 1:2:8,2 push plates 10 are arranged side by side along the axial direction of a main shaft 8, 8 rake nails 9 are arranged side by side along the axial direction of the main shaft 8, and as shown in table 1, the dangerous waste combustion efficiency is high and the discharging speed is high when the structural configuration of the pushing mechanism is adopted.
| Pusher machineComposition of the structure | Quantitative ratio | Combustion efficiency/% | Feed speed/kg/s |
| Push rod: a push plate: rake nail | 1：2：4 | 50 | 32 |
| Push rod: a push plate: rake nail | 1：2：8 | 80 | 50 |
| Push rod: a push plate: rake nail | 1：3：8 | 60 | 44 |
| Push rod: a push plate: rake nail | 1：3：12 | 50 | 38 |
Table 1: influence of structure of pushing mechanism on combustion efficiency and blanking speed
The push plate 10 and the rake nails 9 are made of refractory high-chromium alloy materials which are composed of the following components in percentage by atom,
42 to 45 percent of chromium,
10-12% of nickel,
5-8% of molybdenum,
niobium 1%,
the balance of iron is iron,
the atomic percent sum of each component is 100 percent.
Table 2: influence of the materials of the push plate and the harrow nails on the tissue morphology, the temperature resistance and the tensile strength of the push plate and the harrow nails
The push rod 5 is cast by adopting a heat-resistant nickel-molybdenum alloy material, the heat-resistant nickel-molybdenum alloy material consists of the following components in percentage by atom,
22.5 percent of nickel,
31.5 percent of molybdenum,
the balance of iron is iron,
the atomic percent sum of each component is 100 percent.
Table 3: impact of the material of the push rod on its structure, temperature resistance and tensile strength
The invention also provides a synchronous continuous dangerous waste cement kiln incineration process based on the synchronous continuous dangerous waste cement kiln incineration device, which comprises the following steps:
s1: the material enters the uppermost step 13 from the feed inlet 14, and tertiary air introduced by the air inlet 4 is beaten on the surface of the material on the uppermost step 13 from top to bottom, so that the surface of the material is dried;
s2: the piston rod of the hydraulic cylinder 7 retracts and drives the push rod 5 to move rightwards, the push rod 5 drives the push plate 10 and the harrow nails 9 to synchronously move rightwards through the main shaft 8, the harrow nails 9 loosen and scatter materials on the steps 13, the materials lift the lower end of the push plate 10 upwards, the push plate 10 rotates relative to the main shaft 8, and after the piston rod of the hydraulic cylinder 7 resets, the push plate 10 is separated from contact with the materials and resets to a vertical state under the action of self gravity;
s3: the piston rod of the hydraulic cylinder 7 stretches out and drives the push rod 5 to move leftwards, the push rod 5 drives the push plate 10 and the rake nail 9 to synchronously move leftwards through the main shaft 8, the push plate 10 pushes the material on the uppermost step 13 to the second step 13, and meanwhile, new material enters the uppermost step 13 from the feed inlet 14;
s4: the piston rod of the hydraulic cylinder 7 retracts and drives the push rod 5 to move rightwards, the push rod 5 drives the push plate 10 and the harrow nails 9 to synchronously move rightwards through the main shaft 8, the harrow nails 9 loosen and scatter materials on the two corresponding steps 13 above, the materials lift the lower ends of the two push plates 10 upwards, the push plates 10 rotate relative to the main shaft 8, and after the piston rod of the hydraulic cylinder 7 resets, the push plates 10 are separated from contact with the materials and reset to a vertical state under the action of self gravity;
s5: the piston rod of the hydraulic cylinder 7 stretches out and drives the push rod 5 to move leftwards, the push rod 5 drives the push plate 10 and the rake nail 9 to synchronously move leftwards through the main shaft 8, the corresponding push plate 10 pushes the material on the uppermost step 13 to the second step 13, pushes the material on the second step 13 to the third step 13, and meanwhile, new material enters the uppermost step 13 from the feed inlet 14;
s6: the piston rod of the hydraulic cylinder 7 retracts and drives the push rod 5 to move rightwards, the push rod 5 drives the push plate 10 and the harrow nails 9 to synchronously move rightwards through the main shaft 8, the harrow nails 9 loosen and scatter materials on the corresponding three steps 13, the materials lift the lower ends of the three push plates 10 upwards, the push plates 10 rotate relative to the main shaft 8, and after the piston rod of the hydraulic cylinder 7 resets, the push plates 10 are separated from contact with the materials and reset to a vertical state under the action of self gravity;
s7: the piston rod of the hydraulic cylinder 7 stretches out and drives the push rod 5 to move leftwards, the push rod 5 drives the push plate 10 and the rake nail 9 to synchronously move leftwards through the main shaft 8, the corresponding push plate 10 pushes the material on the uppermost step 13 to the second step 13, pushes the material on the second step 13 to the third step 13 and pushes the material on the third step 13 to the feed opening 12, meanwhile, new material enters the uppermost step 13 from the feed opening 14, and hot air generated in the whole operation process is discharged out of the furnace body 1 through the hot air outlet 3;
s8: repeating steps S6-S7.
The invention has the following advantages:
1. compared with the prior art of air cannon type blanking, the blanking is high in blanking efficiency and higher in stability, the push plate assembly 11 enables the scattering effect of materials on the steps 13 to be more obvious, pre-burning of the materials is facilitated, the burning efficiency is improved by at least 30%, meanwhile, fluctuation of air flow brought by the air cannon in operation to a cement kiln is avoided, the introduced tertiary air is assisted, the materials are burnt more fully, the quality of clinker is improved, as shown in table 2, the content of mineral C3S in the clinker is improved by 3-5%, the crystal grain size of the mineral is smaller and uniform, the structure is good, the f-CaO content is less than 0.5%, the strength of 3d and 28d of prepared cement can be improved by 1.5mpa and 2.8mpa respectively, the adaptability of the cement and the water reducer is good, the loss of 2h is less than 20mm, the prepared concrete slurry is rich, and the pumping construction is easy;
table 4: influence of different blanking driving modes on clinker quality
2. In the invention, the central lines of the air inlet 4 and the feed inlet 14 are mutually vertical, tertiary air is vertically beaten on the surface of a material horizontally entering from the feed inlet 14 from top to bottom through the air inlet 4, and the rapid coking and drying of the surface of the material are facilitated;
3. according to the invention, the hot air outlet 3 is separated from the discharging opening 12, so that heat generated by pre-combustion of dangerous waste is concentrated and enriched into the decomposing furnace 2, the addition of tail coal is reduced, and the effect of saving coal is achieved.
The technical features not described in the present invention may be implemented by the prior art, and are not described herein. The present invention is not limited to the above-described embodiments, and variations, modifications, additions, or substitutions within the spirit and scope of the present invention will be within the scope of the present invention by those of ordinary skill in the art.
Claims (8)
1. A synchronous continuous dangerous waste feeding cement kiln incinerator comprises
A furnace body (1);
the air guiding port (4) is arranged on the right side of the top of the furnace body (1) and is used for guiding tertiary air into the inner cavity of the furnace body (1) to dry the materials;
the feed inlet (14) is arranged at the top of the right side of the furnace body (1) and is used for throwing dangerous wastes into the inner cavity of the furnace body (1);
the hot air outlet (3) is arranged at the upper end of the left side of the furnace body (1) and is used for discharging hot air in the furnace body (1);
the discharging opening (12) is positioned at the left side of the bottom of the furnace body (1) and is used for discharging the pre-burning dangerous waste, the hot air outlet (3) is separated from the discharging opening (12), and heat generated by tertiary air and dangerous waste combustion is sprayed out from the hot air outlet (3) and goes upwards to drive the furnace temperature at the upper part of the furnace body (1) to rise;
it is characterized in that the method comprises the steps of,
the right side of the bottom of the furnace body (1) is of a stepped structure, the uppermost end of the stepped structure is lower than the lower end of the feed inlet (14), the lowermost end of the stepped structure extends to the position of the feed outlet (12), each step (13) in the stepped structure is provided with a pushing mechanism in a matched mode, each pushing mechanism is electrically connected with a controller, and the controller controls each pushing mechanism to synchronously reciprocate left and right along the corresponding step (13);
pushing the material on the corresponding step (13) to the next step (13) or the blanking opening (12) when each pushing mechanism synchronously moves leftwards along the corresponding step (13), and loosening and scattering the newly fallen material on the corresponding step (13) when each pushing mechanism synchronously moves rightwards along the corresponding step (13);
the pushing mechanism comprises a pushing rod (5) and a pushing plate assembly (11) fixedly connected with the pushing rod, and the pushing plate assembly (11) comprises a pushing plate (10) and a rake nail (9); the push rod (5) penetrates through the furnace wall of the furnace body (1) and is in sliding connection with the furnace wall of the furnace body (1), the outer side end of the push rod (5) is fixedly connected with the end part of a piston rod of the hydraulic cylinder (7), the hydraulic cylinder (7) is electrically connected with the controller, and the controller controls the hydraulic cylinder (7) to drive the push rod (5) to reciprocate left and right; the inner side of the push rod (5) is fixedly connected with a main shaft (8), the upper end of the push plate (10) is rotationally connected with the main shaft (8), the upper end of the rake nail (9) is fixedly connected with the main shaft (8), and the push plate (10) is arranged on the left and the rake nail (9) is arranged on the right; when the push rod (5) moves leftwards, an included angle of 90 degrees is formed between the push plate (10) and the push rod (5), an included angle of 0 degrees is formed between the push plate (10) and the rake nails (9), and materials are pushed to the next step (13) or the blanking opening (12) by the push plate (10); when the push rod (5) resets rightwards, the rake nails (9) loosen and scatter newly fallen materials on the corresponding steps (13), and the materials push the push plate (10) to rotate relative to the main shaft (8), so that an included angle of 45 degrees is formed between the push plate (10) and the rake nails (9) at maximum.
2. The synchronous feeding continuous type hazardous waste feeding cement kiln incineration device according to claim 1, wherein the number ratio of push rods (5), push plates (10) and rake nails (9) in the pushing mechanism is 1:2:8,2 push plates (10) are arranged side by side along the axial direction of the main shaft (8), and 8 rake nails (9) are arranged side by side along the axial direction of the main shaft (8).
3. The synchronous feeding continuous type hazardous waste cement kiln incineration device according to claim 2, characterized in that the push plate (10) and the harrow nails (9) are made of refractory high-chromium alloy materials, the refractory high-chromium alloy materials consist of the following components by atomic percent,
42 to 45 percent of chromium,
10-12% of nickel,
5-8% of molybdenum,
niobium 1%,
the balance of iron is iron,
the atomic percent sum of each component is 100 percent.
4. The synchronous continuous hazardous waste cement kiln incineration device according to claim 3, wherein the push rod (5) is cast by adopting a heat-resistant nickel-molybdenum alloy material, the heat-resistant nickel-molybdenum alloy material consists of the following components in percentage by atom,
22.5 percent of nickel,
31.5 percent of molybdenum,
the balance of iron is iron,
the atomic percent sum of each component is 100 percent.
5. The synchronous continuous hazardous waste feeding cement kiln incineration device according to claim 4, wherein a guide ring (6) is embedded and fixed at the furnace wall of the furnace body (1), and the guide ring (6) is made of the same material as the push rod (5), so that the guide ring (6) and the push rod (5) have a self-lubricating function under the high temperature.
6. The synchronous feeding continuous type hazardous waste feeding cement kiln incineration device according to claim 5, wherein the central lines of the air inlet (4) and the feeding hole (14) are mutually perpendicular, and tertiary air is beaten on the surface of a material horizontally fed from the feeding hole (14) from top to bottom through the air inlet (4).
7. The synchronous continuous hazardous waste cement kiln incineration device according to claim 6, wherein three steps (13) are arranged in the stepped structure, and the top of the furnace body (1) is in a vault-shaped structure.
8. A synchronous continuous hazardous waste cement kiln incineration process based on the synchronous continuous hazardous waste cement kiln incineration device according to any one of claims 1 to 7, characterized in that it comprises the following steps:
s1: the material enters the uppermost step (13) from the feed inlet (14), and tertiary air introduced by the air guide inlet (4) is beaten on the surface of the material on the uppermost step (13) from top to bottom, so that the surface of the material is dried;
s2: the piston rod of the hydraulic cylinder (7) is retracted and drives the push rod (5) to move rightwards, the push rod (5) drives the push plate (10) and the rake nails (9) to synchronously move rightwards through the main shaft (8), the rake nails (9) loosen and scatter materials on the steps (13), the materials lift the lower end of the push plate (10) upwards, the push plate (10) rotates relative to the main shaft (8), and after the piston rod of the hydraulic cylinder (7) is reset, the push plate (10) is separated from contact with the materials and is reset to a vertical state under the action of self gravity;
s3: the piston rod of the hydraulic cylinder (7) stretches out and drives the push rod (5) to move leftwards, the push rod (5) drives the push plate (10) and the rake nails (9) to synchronously move leftwards through the main shaft (8), the push plate (10) pushes materials on the uppermost step (13) to the second step (13), and meanwhile, new materials enter the uppermost step (13) from the feed inlet (14);
s4: the piston rod of the hydraulic cylinder (7) is retracted and drives the push rod (5) to move rightwards, the push rod (5) drives the push plate (10) and the harrow nails (9) to synchronously move rightwards through the main shaft (8), the harrow nails (9) loosen and scatter materials on the two corresponding steps (13) above, the materials lift the lower ends of the two push plates (10) upwards, the push plate (10) rotates relative to the main shaft (8), and after the piston rod of the hydraulic cylinder (7) is reset, the push plate (10) is separated from contact with the materials and is reset to a vertical state under the action of self gravity;
s5: the piston rod of the hydraulic cylinder (7) stretches out and drives the push rod (5) to move leftwards, the push rod (5) drives the push plate (10) and the rake nail (9) to synchronously move leftwards through the main shaft (8), the corresponding push plate (10) pushes materials on the uppermost step (13) to the second step (13) and pushes materials on the second step (13) to the third step (13), and meanwhile, new materials enter the uppermost step (13) from the feed inlet (14);
s6: the piston rod of the hydraulic cylinder (7) is retracted and drives the push rod (5) to move rightwards, the push rod (5) drives the push plate (10) and the rake nails (9) to synchronously move rightwards through the main shaft (8), the rake nails (9) loosen and scatter materials on the corresponding three steps (13), the lower ends of the three push plates (10) are lifted upwards by the materials, the push plate (10) rotates relative to the main shaft (8), and after the piston rod of the hydraulic cylinder (7) is reset, the push plate (10) is separated from contact with the materials and is reset to a vertical state under the action of self gravity;
s7: the piston rod of the hydraulic cylinder (7) stretches out and drives the push rod (5) to move leftwards, the push rod (5) drives the push plate (10) and the rake nail (9) to synchronously move leftwards through the main shaft (8), the corresponding push plate (10) pushes materials on the uppermost step (13) to the second step (13), pushes materials on the second step (13) to the third step (13), pushes materials on the third step (13) to the blanking port (12), and meanwhile, new materials enter the uppermost step (13) from the feeding port (14);
s8: repeating steps S6-S7.
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