CN111911935A - Device for reducing thermal ignition loss rate of incineration residues of hazardous waste incineration rotary kiln - Google Patents
Device for reducing thermal ignition loss rate of incineration residues of hazardous waste incineration rotary kiln Download PDFInfo
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- CN111911935A CN111911935A CN202010783902.2A CN202010783902A CN111911935A CN 111911935 A CN111911935 A CN 111911935A CN 202010783902 A CN202010783902 A CN 202010783902A CN 111911935 A CN111911935 A CN 111911935A
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- Prior art keywords
- rotary kiln
- incineration
- cover
- inner chamber
- feeding
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- 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
- F23G5/20—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having rotating or oscillating drums
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- 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
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- 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
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Incineration Of Waste (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses a device for reducing the thermal ignition loss rate of incineration residue of a hazardous waste incineration rotary kiln, which comprises: the useless rotary kiln that burns of danger, special carbon residue burn rotary kiln and second combustion chamber, the useless rotary kiln that burns of danger and special carbon residue burn the rotary kiln structure the same, all include: the feeding cover, the inner chamber, the supporting device, the transmission device and the discharging cover, wherein the inner chamber is supported on the supporting device, the transmission device drives the inner chamber to rotate, the feeding cover is sleeved at the feeding port end of the inner chamber, and the discharging cover is sleeved at the discharging port end of the inner chamber; the discharge cover of the hazardous waste incineration rotary kiln is communicated with the feeding cover of the special residual carbon incineration rotary kiln through a feeding chute; the discharge cover of the hazardous waste incineration rotary kiln and the special type residual carbon incineration rotary kiln are provided with smoke outlets, and the smoke outlets of the hazardous waste incineration rotary kiln and the special type residual carbon incineration rotary kiln are communicated with a smoke inlet of the secondary combustion chamber through a smoke channel. The invention has strong adaptability of waste disposal, the incineration removal rate is more than 99.99 percent, and the slag thermal ignition loss rate is less than 5 percent.
Description
Technical Field
The invention relates to the technical field of hazardous waste treatment, in particular to a device for reducing the thermal ignition loss rate of incineration residues of a hazardous waste incineration rotary kiln.
Background
With the development of socioeconomic and urbanization, the generation amount of hazardous waste in chemical and medical industries is increasing. The dangerous waste is basically treated by burning and is mainly buried safely, the rotary kiln is a common device for burning, the working principle of the rotary kiln is that the dangerous waste is fed from the cold end of the kiln, and the kiln has 2.5 to 4.5 percent of inclination and continuously rotates, so that the dangerous waste continuously moves to the hot end. The fuel is sprayed from the hot end, the fuel is combusted and released heat under the combustion of air and generates high-temperature flue gas, the hot gas flows from the hot end to the secondary end under the driving of the fan, the retention time of the garbage in the kiln is adjusted according to the change of the rotating speed of the cylinder, and the heat exchange is carried out on the material and the flue gas in the process of reverse movement, so that the hazardous waste is fully combusted. The rotary kiln incinerator has the advantages of simple equipment, convenience in maintenance, wide garbage application range, capability of adjusting the time in the garbage incinerator through the rotating speed and the like, but compared with the mechanical grate incinerator widely applied at present, the rotary kiln incinerator has the defects that air supply is not suitable for sectional adjustment, large garbage is not easy to burn out, the requirement on the heat value of the garbage is high (more than 2500 kcal/kg) and the like, the heat ignition loss rate of the garbage incinerator slag is difficult to be reduced to be below 5% of the national standard, and therefore the application of the rotary kiln in the field of household garbage incineration is limited. The rotary kiln is commonly used for industrial waste and medical waste with complex components and toxic and harmful at present, and is less applied to household garbage incineration.
Aiming at the difficulty of the thermal ignition reduction rate of the waste slag incinerated by the rotary kiln at present, the device for reducing the thermal ignition reduction rate of the incineration residue of the hazardous waste incineration rotary kiln achieves good effect.
Disclosure of Invention
The embodiment of the invention aims to provide a device for reducing the thermal ignition reduction rate of incineration residues of a hazardous waste incineration rotary kiln, so as to solve the problem of high thermal ignition reduction rate of the incineration residues in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the embodiment of the invention provides a device for reducing the thermal ignition loss rate of incineration residues of a hazardous waste incineration rotary kiln, which comprises: the useless rotary kiln that burns of danger, special type carbon residue burn rotary kiln and second combustion chamber, the useless rotary kiln that burns of danger and special type carbon residue burn rotary kiln structure the same, all include: the feeding cover, the inner chamber, the supporting device, the transmission device and the discharging cover, wherein the inner chamber is supported on the supporting device, the transmission device drives the inner chamber to rotate, the feeding cover is sleeved at the feeding port end of the inner chamber, and the discharging cover is sleeved at the discharging port end of the inner chamber; the discharge cover of the dangerous waste incineration rotary kiln is communicated with the feeding cover of the special type carbon residue incineration rotary kiln through a feeding chute; the discharge cover of the dangerous waste incineration rotary kiln and the special type residual carbon incineration rotary kiln is provided with a smoke outlet, and the smoke outlets of the dangerous waste incineration rotary kiln and the special type residual carbon incineration rotary kiln are communicated with the smoke inlet of the secondary combustion chamber through a smoke channel.
Furthermore, the end face of the feeding cover is provided with an access hole, an auxiliary fuel nozzle and an observation hole.
Further, the inner chamber is cylindrical and is formed by wrapping a shell and an annular material paved on the inner side of the shell, and a shoveling plate is further arranged on the inner side of the inner chamber shell of the special type residual carbon incineration rotary kiln.
Further, the supporting device comprises a steel ring sleeved and fixed outside the inner bore and a pair of supporting wheels used for supporting the steel ring.
Further, the transmission device comprises a gear ring and a power output device, the gear ring is sleeved and fixed outside the inner bore, and the power output device is coupled with the gear ring.
Furthermore, the diameter of the discharging cover is larger than that of the inner bore, an iron protecting plate is arranged on the edge of a cover opening of the discharging cover and connected with a cold air sleeve, and the inner bore is sealed through stainless steel fish scales and the cold air sleeve.
Furthermore, the discharge cover of the special type residual carbon incineration rotary kiln is also provided with a waste residue outlet.
Further, the waste residue outlet is communicated with the ash hopper through another discharging chute.
Further, the inner bore burning temperature of the dangerous waste burning rotary kiln is 850-950 ℃, and the inner bore burning temperature of the special type carbon residue burning rotary kiln is 1200-1300 ℃.
Further, the material of the feeding cover and the discharging cover can resist the high temperature of 800-900 ℃.
According to the technical scheme, the invention has the beneficial effects that: the device for effectively reducing the thermal ignition reduction rate of the incineration residue of the hazardous waste incineration rotary kiln is characterized in that the hazardous waste is further incinerated through the device, the residence time of the hazardous waste in the kiln is prolonged, and unburned carbon residue substances of the hazardous waste incineration rotary kiln are fully combusted, so that the thermal ignition reduction rate of the incineration residue of the hazardous solid waste is greatly reduced, and the thermal ignition reduction rate reaches and is lower than the requirement (the standard requires that the thermal ignition reduction rate of the incineration residue is less than 5%) for the thermal ignition reduction rate of the incineration residue in the hazardous waste incineration pollution control standard. The invention can realize the sealing of the device, prevent the leakage of the hazardous waste and has better incineration efficiency than the traditional hazardous waste incineration rotary kiln device. The invention has the characteristics of simple structure, low noise, low investment cost, mature structure of adopted equipment, simple operation, reliable operation and the like, and has better economy.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of an apparatus for reducing thermal ignition loss of incineration residue of a hazardous waste incineration rotary kiln, provided by an embodiment of the invention;
FIG. 2 is a sectional view taken along line 1-1' of FIG. 1;
FIG. 3 is a fragmentary view taken from 2-2' of FIG. 1;
in the figure: A. a hazardous waste incineration rotary kiln; B. special type residual carbon burning rotary kiln; 1. a feed hood; 2. an inner bore; 3. a support device; 4. a transmission device; 5. a discharge cover; 6. a feeding chute; 7. a discharging chute; 8. a slag hopper; 9. a second combustion chamber; 10. steel rings; 11. a riding wheel; 12. a ring gear; 13, a speed reducer; 14. an electric motor.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1, an embodiment of the present invention provides an apparatus for reducing thermal ignition loss of incineration residue of a hazardous waste incineration rotary kiln, including: useless rotary kiln A that burns of danger, special type carbon residue burn rotary kiln B and second combustion chamber 9, the useless rotary kiln A that burns of danger is the same with special type carbon residue burn rotary kiln B structure, all includes: the feeding device comprises a feeding cover 1, an inner chamber 2, a supporting device 3, a transmission device 4 and a discharging cover 5, wherein the inner chamber 2 is supported on the supporting device 3, the transmission device 4 drives the inner chamber 2 to rotate, the feeding cover 1 is sleeved at the feeding port end of the inner chamber 2, and the discharging cover 5 is sleeved at the discharging port end of the inner chamber 2; the discharge cover 5 of the dangerous waste incineration rotary kiln A is communicated with the feeding cover 1 of the special type carbon residue incineration rotary kiln B through a feeding chute 6; the discharge cover 5 of the dangerous waste incineration rotary kiln A and the special type residual carbon incineration rotary kiln B are provided with smoke outlets, and the smoke outlets of the dangerous waste incineration rotary kiln A and the special type residual carbon incineration rotary kiln B are communicated with a smoke inlet of the secondary combustion chamber 9 through a smoke channel.
In this embodiment, the feeding cover 1 suit is in the feed inlet end of bore 2, can adopt the steel sheet welding to form the cover shape, and the landing leg seat through both sides is on feeding cover operation platform, builds firebrick by laying bricks in the feeding cover, and outer terminal surface is equipped with auxiliary fuel nozzle, access hole and observation hole before the feeding cover to observe the material condition of burning, get into the work such as feeding cover overhauls and device lining is built by laying bricks or stones.
In this embodiment, the inner chamber 2 is cylindrical and is formed by wrapping a shell and an annular material paved on the inner side of the shell, the shell is formed by rolling and welding steel plates, and a shoveling plate is further arranged on the inner side of the inner chamber shell of the special type residual carbon incineration rotary kiln B. The inner chamber 2 is arranged on the riding wheel 11 with the gradient of 2.5-4.5%, the bottom end is provided with a high-temperature wear-resistant feeding cover protecting iron plate to form a sleeve space, and a cold air sleeve is arranged to cool the feeding cover part. The shoveling plates can be made of refractory bricks and are vertically arranged on the inner side of the shell and the annular material. The shoveling plate can be used for shoveling materials, scattering the materials and moving the materials in the cylinder under the transmission action, so that the contact surface of the materials and the carbon residue is enlarged, and the carbon residue substances which are not burnt out in front are fully burnt.
In this embodiment, as shown in fig. 2, the supporting device 3 includes a steel ring 10 sleeved and fixed outside the inner bore 2 and a pair of supporting wheels 11 for supporting the steel ring, and bears the weight of all revolving parts such as the inner bore 2, the lining, and the material.
In this embodiment, the transmission device 4 includes a gear ring 12 and a power output device, the gear ring is sleeved and fixed outside the inner bore 2, and the power output device is coupled with the gear ring, so that the device can normally rotate at a rotation speed required by a process, and can regulate the speed within a certain rotation speed range as required. The transmission device 4 fixes a gear ring in the middle of the inner chamber 2 to transmit torque, and the gear ring 12 is connected with the inner chamber 2 through a tangential spring plate, so that a sufficient heat dissipation space is reserved between the gear ring 12 and the inner chamber 2, the influence of bending deformation and the like of the inner chamber 2 on the meshing precision can be reduced, a certain damping and buffering effect can be achieved, and the service life of the lining can be prolonged. The power output device comprises a speed reducer 13 and a motor 14, and the motor 14 is rotationally connected with the speed reducer 13, as shown in fig. 3.
In the embodiment, the diameter of the discharging cover 5 is larger than that of the inner chamber 2, and the edge of the cover opening of the discharging cover 5 is provided with the iron protecting plate, so that the cover opening edge is prevented from being deformed or damaged due to too high temperature of the discharging opening, and the replacement is convenient; the iron protecting plate is connected with the cold air sleeve, the inner chamber 2 is sealed through the stainless steel fish scale and the cold air sleeve to reduce heat loss, dust is not brought out when hot air overflows, and the feeding cover and the discharging cover are made of materials capable of resisting the high temperature of 800-900 ℃.
In this embodiment, the discharge cover 5 of the special carbon residue incineration rotary kiln B is further provided with a waste residue outlet.
In this embodiment, the waste residue outlet is communicated with a slag hopper 8 through another discharging chute 7.
In this embodiment, the flue gas that 5 play of the two ejection of compact cover of the useless rotary kiln A of burning of danger and special type carbon residue burning rotary kiln B pass through flue gas passageway with the flue gas entry of two combustion chambers 9 bottoms is linked together, and the flue gas that does not burn completely is fully burnt in two combustion chambers 9, discharges after up to standard, and the useless rotary kiln's of burning of danger slag gets into the feed inlet of special type carbon residue burning rotary kiln B through feeding elephant trunk 6 and further burns, and the residue after burning falls into ash bucket 8 from special type carbon residue burning rotary kiln B's ejection of compact cover through ejection of compact elephant trunk 7. In this embodiment, the incineration temperature of the bore 2 of the dangerous waste incineration rotary kiln a is 850 ℃ -950 ℃, the incineration temperature of the bore 2 of the special type residual carbon incineration rotary kiln B is 1200 ℃ -1300 ℃, the device for feeding the residual carbon substances which are not incinerated cleanly by the dangerous waste incineration rotary kiln a into the rotary kiln B from the feeding cover is provided with a shoveling plate in the bore, the residual carbon substances can be shoveled and scattered down and advance in the cylinder under the transmission action through the inclination of the bore 2 and the shoveling plate, the contact surface between the residual carbon substances and the bore is increased, the coke substances are rolled along the circumferential direction and move along the axial direction, the full incineration is obtained, meanwhile, the effective retention time of the incineration of the coke substances is also prolonged, so that the heat ignition loss rate of the incineration residues is effectively reduced, and the national standard is reached.
The device for reducing the thermal ignition reduction rate of the incineration residues of the hazardous waste incineration rotary kiln provided by the invention has the advantages that the hazardous waste is further incinerated through the special residual carbon incineration rotary kiln, the retention time of the hazardous waste in the kiln is prolonged, and unburned residual carbon substances of the hazardous waste incineration rotary kiln are fully combusted, so that the thermal ignition reduction rate of the incineration residues of the hazardous solid waste is greatly reduced, and the requirement on the thermal ignition reduction rate of the incineration residues in the hazardous waste incineration pollution control standard (the standard requires that the thermal ignition reduction rate of the incineration residues is less than 5%) is met and lower. The invention has the characteristics of simple structure, low noise, low investment cost, strong waste disposal adaptability, high economical efficiency, mature equipment structure, simple operation, reliable operation and the like, and the incineration removal rate is more than 99.99 percent and the hot ignition loss rate of slag is less than 5 percent.
The device for reducing the thermal ignition loss rate of the incineration residues of the hazardous waste incineration rotary kiln effectively reduces the thermal ignition loss rate of the incineration residues of hazardous wastes by further incinerating the hazardous wastes through the device. The invention can realize the sealing of the device, prevent the leakage of the hazardous waste and has better incineration efficiency than the traditional hazardous waste incineration rotary kiln device. The invention has the characteristics of simple structure, low noise, low investment cost, mature structure of adopted equipment, simple operation, reliable operation and the like, and has better economy.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A device for reducing the thermal ignition loss rate of incineration residue of a hazardous waste incineration rotary kiln, characterized by comprising: the useless rotary kiln (A) that burns of danger, special type carbon residue burn rotary kiln (B) and second combustion chamber (9), the useless rotary kiln (A) that burns of danger and special type carbon residue burn rotary kiln (B) the same structure, all include: the feeding device comprises a feeding cover (1), an inner chamber (2), a supporting device (3), a transmission device (4) and a discharging cover (5), wherein the inner chamber (2) is supported on the supporting device (3), the transmission device (4) drives the inner chamber (2) to rotate, the feeding cover (1) is sleeved at the feeding port end of the inner chamber (2), and the discharging cover (5) is sleeved at the discharging port end of the inner chamber (2); the discharge cover (5) of the dangerous waste incineration rotary kiln (A) is communicated with the feeding cover (1) of the special carbon residue incineration rotary kiln (B) through a feeding chute (6); the discharge cover (5) of the dangerous waste incineration rotary kiln (A) and the special residual carbon incineration rotary kiln (B) are provided with smoke outlets, and the smoke outlets of the dangerous waste incineration rotary kiln (A) and the special residual carbon incineration rotary kiln (B) are communicated with a smoke inlet of the secondary combustion chamber (9) through a smoke channel.
2. The device according to claim 1, characterized in that the end face of the feeder hood (1) is provided with access openings, auxiliary fuel nozzles and observation holes.
3. The device according to claim 1, wherein the inner chamber (2) is cylindrical and is composed of a shell and an annular material package laid on the inner side of the shell, and a shoveling plate is further arranged on the inner side of the inner chamber shell of the special type residual carbon incineration rotary kiln (B).
4. Device according to claim 1, characterized in that said support means (3) comprise a steel ring fixed in a nested manner outside said internal chamber (2) and a pair of jockey wheels for cradling said steel ring.
5. The device according to claim 1, characterized in that the transmission (4) comprises a ring gear, which is fixed outside the bore (2) in a sleeve, and a power take-off, which is coupled to the ring gear.
6. The device according to claim 1, characterized in that the diameter of the discharging cover (5) is larger than that of the inner chamber (2), the edge of the cover opening of the discharging cover (5) is provided with an iron protecting plate, the iron protecting plate is connected with a cold air jacket, and the inner chamber (2) is sealed through stainless steel fish scales and the cold air jacket.
7. The device according to claim 1, wherein the discharge hood (5) of the special type residual carbon incineration rotary kiln (B) is further provided with a waste residue outlet.
8. The apparatus according to claim 1, characterized in that the slag outlet communicates with the slag hopper (8) via a further discharge chute (7).
9. The device according to claim 1, wherein the incineration temperature of the inner bore (2) of the hazardous waste incineration rotary kiln (A) is 850-950 ℃, and the incineration temperature of the inner bore (2) of the special carbon residue incineration rotary kiln (B) is 1200-1300 ℃.
10. The apparatus of claim 1, wherein the material of the inlet hood and the outlet hood should be able to withstand high temperatures of 800 ℃ to 900 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010783902.2A CN111911935A (en) | 2020-08-06 | 2020-08-06 | Device for reducing thermal ignition loss rate of incineration residues of hazardous waste incineration rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010783902.2A CN111911935A (en) | 2020-08-06 | 2020-08-06 | Device for reducing thermal ignition loss rate of incineration residues of hazardous waste incineration rotary kiln |
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| Publication Number | Publication Date |
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| CN111911935A true CN111911935A (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010783902.2A Pending CN111911935A (en) | 2020-08-06 | 2020-08-06 | Device for reducing thermal ignition loss rate of incineration residues of hazardous waste incineration rotary kiln |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460944A (en) * | 2020-11-25 | 2021-03-09 | 商都中建金马冶金化工有限公司 | Horizontal rotary kiln |
-
2020
- 2020-08-06 CN CN202010783902.2A patent/CN111911935A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460944A (en) * | 2020-11-25 | 2021-03-09 | 商都中建金马冶金化工有限公司 | Horizontal rotary kiln |
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