CN210638051U - Prevent useless burning furnace that burns of high efficiency danger of returning charge - Google Patents
Prevent useless burning furnace that burns of high efficiency danger of returning charge Download PDFInfo
- Publication number
- CN210638051U CN210638051U CN201921719446.4U CN201921719446U CN210638051U CN 210638051 U CN210638051 U CN 210638051U CN 201921719446 U CN201921719446 U CN 201921719446U CN 210638051 U CN210638051 U CN 210638051U
- Authority
- CN
- China
- Prior art keywords
- steel plate
- arc steel
- kiln
- wind
- rotary kiln
- 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
Images
Abstract
The utility model provides a high-efficiency hazardous waste incinerator for preventing material return, wherein a circle of sealed air ring structure is arranged at a kiln hood cover in a rotary kiln, and a circle of circular arc steel plate is arranged outside the air ring; one end of the arc steel plate is fixedly connected with the outer side of the wind ring, and the other end of the arc steel plate is suspended in the air; the radius of the arc steel plate is 1800-1850 mm, the chord length of the arc steel plate is 350-400 mm, and the included angle between the chord of the arc and the wind ring is 135 ℃; the convex surface of the arc steel plate faces the kiln head. The utility model discloses with the wind hole shutoff on the former wind circle steel sheet, then set up in wind circle a week and take the circular arc steel sheet, change from the kiln head from south to north to the wind direction of a wind that the tangential got into the rotary kiln, a wind is once more through the circular arc steel sheet from west to east to disperse type tangential direction and get into rotary kiln furnace.
Description
Technical Field
The utility model belongs to the technical field of hazardous waste handles, especially, relate to a prevent useless burning furnace that burns of high efficiency danger of returning charge.
Background
The incinerator is an environment-friendly device which can incinerate waste gas, waste liquid, solid waste object fuel, domestic waste products and the like at high temperature to reduce or reduce the quantitative number, and simultaneously, the incinerator can utilize the heat energy of partial incineration media.
The incinerator consists of a rotary kiln body, a secondary combustion chamber, a fuel gas combustor and the like. The rotary kiln comprises a kiln head, a kiln body, a kiln tail, a transmission mechanism and the like. The kiln head is provided with a mixed fuel gas burner, a combustion air inlet and a sealing cover of the rotary kiln and the kiln head. The kiln head is protected by refractory material, and the refractory layer is supported by a layer of water cooling support ring and is positioned at the bottom end of the kiln head. A waste collector is arranged at the lower part to collect waste leakage. The kiln tail is a transition body which is connected with the rotary kiln body and the secondary combustion chamber, and the main function of the kiln tail is to ensure the sealing of the kiln tail and the conveying channel of the smoke and the incineration ash. And because the temperature of the kiln tail is high, a kiln tail air cooling device is added for cooling in order to protect a kiln body steel plate. And a water seal scraper slag extractor is arranged below the kiln tail to discharge the burnt slag.
In the prior art, combustion-supporting air of a kiln head of a rotary kiln is divided into two paths, one path (primary air) enters the rotary kiln through a burner at the kiln head, the main purposes are that the burner supports combustion and the heat of the burner is accelerated to spread into an incinerator, the other path (secondary air) enters the rotary kiln through a kiln head cover in a tangential direction, a circle of air ring structure is arranged at the position of the kiln head cover in the rotary kiln, and 29 air holes of DN50 are uniformly formed in an air ring steel plate. By adjusting the secondary air of the second path, the air quantity is increased (namely the oxygen content is increased), the concentration of carbon monoxide and carbon dioxide in the flue gas is simultaneously increased, the combustion efficiency is reduced,
in addition, the gradient of rotary kiln is 1.5, and in the burning process, the dangerous waste of rotary kiln hood causes the returning charge more easily, and the returning charge gets into kiln hood returning charge collecting box and still is in high temperature state, can produce partial poisonous and harmful flue gas excessive, can ignite when the returning charge height is close kiln hood high temperature portion, causes a large amount of flue gas excessive, also causes personnel to scald the risk easily when artifical clearance returning charge.
SUMMERY OF THE UTILITY MODEL
The utility model provides a prevent useless burning furnace that burns of high efficiency danger of returning charge, the utility model provides an burn burning furnace combustion efficiency height, reduced the returning charge condition of rotary kiln head simultaneously.
The utility model provides a high-efficiency hazardous waste incinerator for preventing material return, wherein a circle of sealed air ring is arranged at a kiln hood cover in a rotary kiln, and a circle of circular arc steel plate is arranged outside the air ring;
one end of the arc steel plate is fixedly connected with the outer side of the wind ring, and the other end of the arc steel plate is suspended in the air;
the radius of the arc steel plate is 1800-1850 mm, the chord length of the arc steel plate is 350-400 mm, and the included angle between the chord of the arc and the wind ring is 135 ℃;
the convex surface of the arc steel plate faces the kiln head.
Preferably, one end of the arc steel plate is fixedly connected with one end of the wind ring close to the kiln tail.
Preferably, the thickness of the arc steel plate is 5-15 mm.
Preferably, the arc steel plate is 904L arc steel plate of 2Cr25Ni 20.
Preferably, the diameter of the air ring is 2000-2500 mm;
the width of the wind ring is 280 mm.
Preferably, the radius of the circular arc steel plate is 1826mm, and the chord length is 380 mm.
The utility model provides a high-efficiency hazardous waste incinerator for preventing material return, which is characterized in that a circle of sealed air ring structure is arranged at the kiln head cover in a rotary kiln, and a circle of circular arc steel plate is arranged outside the air ring; one end of the arc steel plate is fixedly connected with the outer side of the wind ring, and the other end of the arc steel plate is suspended in the air; the radius of the arc steel plate is 1800-1850 mm, the chord length of the arc steel plate is 350-400 mm, and the included angle between the chord of the arc and the wind ring is 135 ℃; the convex surface of the arc steel plate faces the kiln head. The utility model discloses with the wind hole shutoff on the former wind circle steel sheet, then set up in wind circle a week and take the circular arc steel sheet, change the overgrate air wind direction that gets into the rotary kiln from south to north to the tangential from the kiln head, the overgrate air is once more through the circular arc steel sheet from west to east to disperse type tangential direction and get into rotary kiln furnace from west.
The improved structure of the utility model has the following two main points, firstly, a larger turbulent flow is formed in the rotary kiln as far as possible so as to improve the burning efficiency of the dangerous waste in the burning furnace; the second, the gradient of rotary kiln is 1.5, and at the incineration process, the dangerous waste material of rotary kiln hood causes the returning charge more easily, and the returning charge gets into kiln hood returning charge collecting box and still is in the high temperature condition, can produce the poisonous harmful flue gas of part and overflow, can ignite when the returning charge height is close kiln hood high temperature portion, causes a large amount of flue gas to overflow, also causes personnel scald risk easily when artifical clearance returning charge. Through the utility model discloses the circular arc steel sheet that adds makes the overgrate air disperse type tangential direction from west to east and gets into rotary kiln furnace, can send into the dangerous wastes material tangential that near wind circle kiln head two spirals fall into and burn in the rotary kiln, and furthest's reduction kiln head returning charge hidden danger improves rotary kiln incineration efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural view of a kiln head air ring in a conventional hazardous waste incinerator;
wherein, 1 is a wind ring, and 2 is a wind hole;
FIG. 2 is a structural front view of the tuyere ring of the medium-risk waste incineration kiln head of the utility model;
wherein, 1 is a wind ring, and 2 is an arc-shaped steel plate;
figure 3 is the side section view of the utility model discloses the useless incineration kiln head solar collar of well danger.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a high-efficiency hazardous waste incinerator for preventing material return, which is characterized in that a circle of sealed air ring structure is arranged at the kiln head cover in a rotary kiln, and a circle of circular arc steel plate is arranged outside the air ring;
one end of the arc steel plate is fixedly connected with the outer side of the wind ring, and the other end of the arc steel plate is suspended in the air;
the radius of the arc steel plate is 1800-1850 mm, the chord length of the arc steel plate is 350-400 mm, and the included angle between the chord of the arc and the wind ring is 135 ℃;
the convex surface of the arc steel plate faces the kiln head.
The utility model provides an burn burning furnace rotary kiln body, second combustion chamber, fuel gas combustor etc. and constitute.
(1) Rotary kiln body
The method comprises the steps that hazardous wastes are fed into a rotary kiln body through a feeding mechanism to be subjected to high-temperature incineration, the materials are thoroughly incinerated into high-temperature smoke and ash residues after the high-temperature incineration for about 60min (45-70), the rotating speed of the rotary kiln can be adjusted, a stable slag layer with the thickness of about 50mm can be kept to play a role in protecting a refractory layer, the operating temperature of the rotary kiln is controlled to be about 850-1100 ℃, the high-temperature smoke enters a secondary combustion chamber from a kiln tail, the incineration ash residues enter a water-seal scraper slag extractor from the kiln tail, enter a ton bag after water cooling, and are periodically sent to a safe landfill area to be buried.
The rotary kiln comprises a kiln head, a kiln body, a kiln tail, a transmission mechanism and the like. The kiln head is provided with a mixed fuel gas burner, a combustion air inlet and a sealing cover of the rotary kiln and the kiln head. The kiln head is protected by refractory material, and the refractory layer is supported by a layer of water cooling support ring and is positioned at the bottom end of the kiln head. A waste collector is arranged at the lower part to collect waste leakage. The kiln tail is a transition body which is connected with the rotary kiln body and the secondary combustion chamber, and the main function of the kiln tail is to ensure the sealing of the kiln tail and the conveying channel of the smoke and the incineration ash. And because the temperature of the kiln tail is high, a kiln tail air cooling device is added for cooling in order to protect a kiln body steel plate. And a water seal scraper slag extractor is arranged below the kiln tail to discharge the burnt slag.
Besides the feeding interface, the kiln head is also provided with a mixed fuel gas burner.
(2) Second combustion chamber
The flue gas burnt at high temperature in the rotary kiln incinerator enters a secondary combustion chamber from the kiln tail, the flue gas is burnt out in the secondary combustion chamber, and the temperature of the secondary combustion chamber is controlled to be more than 1100 ℃. According to the incineration theory, the principle of full incineration of the flue gas is the 3T +1E principle, namely, enough temperature (the hazardous waste incinerator: 1100 ℃) is ensured, enough residence time (the hazardous waste incinerator: 1100 ℃ for >2s) is ensured, enough disturbance (the throat of a second combustion chamber is combusted by secondary air or a burner to enable airflow to form swirling flow) and enough excess oxygen are ensured, wherein the first three functions are completed by the second combustion chamber. The secondary air and the two burners are arranged at the lower part of the secondary combustion chamber, so that the flue gas temperature of the secondary combustion chamber reaches the standard and the flue gas has enough disturbance. A small amount of incompletely combusted gas in the rotary kiln body is fully combusted in the secondary combustion chamber, the temperature of the secondary combustion chamber is increased, the temperature in the secondary combustion chamber is always maintained above 1100 ℃, the retention time of the flue gas in the secondary combustion chamber is more than 2s, and under the condition, more than 99.99 percent of dioxin and other harmful components in the flue gas are decomposed. The second combustion chamber furnace kiln is composed of high-alumina bricks and heat-insulating materials, and the temperature of the outer wall of the second combustion chamber is about 150 ℃. The whole incineration system is always in a negative pressure state to prevent the smoke from leaking outwards.
The upper part of the second combustion chamber is provided with a flue gas outlet, the flue gas in the second combustion chamber is discharged into a flue through the outlet, and the high-temperature flue gas leaves the second combustion chamber and enters the waste heat boiler through the flue for heat exchange.
(3) Ash collecting and processing system
The ash residue in the incineration system mainly refers to incineration slag, and incineration residue of the incineration furnace enters a water seal scraper slag extractor from a kiln tail to be water-quenched and then is conveyed out by the scraper slag extractor, and is conveyed to a special slag bin through a scraper conveyor, and is periodically conveyed to a safe landfill area by a truck for landfill.
The utility model discloses mainly the wind circle structure to setting up of rotary kiln head department improves, the utility model provides a rotary kiln, two combustion chambers and lime-ash collection processing system's other major structure are the structure that technical personnel in the field are familiar, no longer describe herein.
In the process of burning dangerous waste by the incinerator, according to the technical performance index of the incinerator in the hazardous waste burning pollution control standard (GB18484-2001), the burning efficiency is required to be ensured to be more than or equal to 99.9 percent, and the calculation formula of the burning efficiency is as follows:
in formula I: [ CO ]2]And [ CO ]]Respectively the concentration of carbon dioxide and carbon monoxide in the flue gas after the hazardous waste is combusted.
As can be seen from the formula, in order to make CE more than or equal to 99.9%, it is necessary to increase the concentration of carbon dioxide and reduce the concentration of carbon monoxide in the incineration flue gas, and the concentrations of carbon dioxide and carbon monoxide are related to the oxygen content when being converted, namely:
in the formula: c-concentration of measured contaminant in mg/m after conversion under standard conditions3)，
O1-concentration (%) of oxygen in the exhaust gas;
c1concentration of the contaminant to be measured in the standard state (mg/m)3). Formula II;
therefore, according to formula I, to make CE equal to or greater than 99.9%, it is necessary to increase the concentration of carbon dioxide and decrease the concentration of carbon monoxide in the flue gas as much as possible, i.e., by increasing the oxygen content in the flue gas, whereas according to formula II, the oxygen content is increased, the reduced concentrations of carbon monoxide and carbon dioxide, especially the carbon dioxide concentration, are decreased, and thus the combustion efficiency CE is decreased.
Therefore, the utility model discloses a explore, improved the hot blast blowpipe apparatus's of rotary kiln structure, found the balance point between oxygen content concentration, carbon dioxide concentration and the carbon monoxide concentration of hazardous waste incineration in-process, realized that the incineration efficiency of hazardous waste incineration in-process satisfies the standard requirement.
And simultaneously, the utility model discloses can also effectively control dangerous wastes material at the rotary kiln head returning charge to the phenomenon of ash collecting bucket, reduce the rotary kiln head returning charge burning and cause the excessive risk of waste gas, avoid the high temperature flying dust to injure people's accident.
The utility model discloses in, kiln hood cover department is provided with the sealed solar or lunar halo of round in the rotary kiln, the outside of solar or lunar halo is provided with round circular arc steel sheet.
The utility model discloses in, the solar or lunar halo no longer is provided with the wind hole, but sealed to round circular arc shaped steel plate has been set up in the outside of solar or lunar halo, the one end of convex steel plate with solar or lunar halo fixed connection, if the welding, the other end is unsettled. The circle of circular arc-shaped steel plates are distributed around the wind ring in a skirt pendulum shape.
In the utility model, the diameter of the air ring is preferably 2000-2500 mm, more preferably 2100-2400 mm, and most preferably 2200-2300 mm; the width of the wind ring is preferably 280 mm.
The convex surface of the circular arc steel plate faces the kiln head, the concave surface of the circular arc steel plate faces the kiln tail, the radius of the circular arc steel plate is preferably 1800-1850 mm, more preferably 1810-1840 mm, most preferably 1820-1830 mm, and concretely, in an embodiment of the invention, the radius can be 1826 mm; the chord length of the circular arc steel plate is preferably 350-400 mm, more preferably 360-390 mm, and most preferably 370-380 mm; the included angle between the chord of the circular arc and the wind ring is 135 degrees; the thickness of the arc steel plate is preferably 5-15 mm, and more preferably 10 mm.
The utility model discloses in, the circular arc steel sheet is preferably the 904L circular arc steel sheet that the trade mark is 2Cr25Ni20, and this kind of steel sheet is the anti-oxidant steel that can heat repeatedly, can satisfy the high temperature operation requirement in the rotary kiln.
Compared with the prior art, the utility model provides a prevent high efficiency danger waste incinerator of returning charge has following advantage:
1) the newly added arc steel plate can increase the turbulence required in the incineration process of the hazardous waste and meet the technical performance index of the combustion efficiency of the incinerator in the hazardous waste incineration pollution control standard (GB 18484-2001);
2) the newly added arc steel plate can enter the rotary kiln in the tangential direction of the arc steel plate through secondary air entering from the tangent of the rotary kiln, so that the material returning condition of the kiln head of the rotary kiln is reduced as much as possible;
3) the arc steel plate is formed by welding two high-temperature resistant steel materials by utilizing manual electric arc welding and is designed into an arc shape, so that twice tangential lines of secondary air enter the rotary kiln, particularly the second tangential lines enter, and hazardous wastes near an air ring can be conveyed to the rotary kiln by utilizing the secondary air.
Claims (6)
1. A high-efficiency hazardous waste incinerator for preventing material return is characterized in that a circle of sealed air ring is arranged at a kiln hood in a rotary kiln, and a circle of arc steel plate is arranged outside the air ring;
one end of the arc steel plate is fixedly connected with the outer side of the wind ring, and the other end of the arc steel plate is suspended in the air;
the radius of the arc steel plate is 1800-1850 mm, the chord length of the arc steel plate is 350-400 mm, and the included angle between the chord of the arc and the wind ring is 135 ℃;
the convex surface of the arc steel plate faces the kiln head.
2. The high efficiency incinerator according to claim 1, wherein one end of said circular arc steel plate is fixedly connected to one end of said wind ring near the kiln tail.
3. The high efficiency incinerator according to claim 1, wherein said circular arc steel plate has a thickness of 5-15 mm.
4. The high efficiency incinerator according to claim 1, wherein said arc shaped steel plate is 904L arc shaped steel plate of 2Cr25Ni 20.
5. The high efficiency hazardous waste incinerator according to claim 1, wherein said air ring has a diameter of 2000-2500 mm;
the width of the wind ring is 280 mm.
6. The high efficiency incinerator according to claim 1 wherein the radius of said circular arc steel plate is 1826mm and the chord length is 380 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921719446.4U CN210638051U (en) | 2019-10-14 | 2019-10-14 | Prevent useless burning furnace that burns of high efficiency danger of returning charge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921719446.4U CN210638051U (en) | 2019-10-14 | 2019-10-14 | Prevent useless burning furnace that burns of high efficiency danger of returning charge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210638051U true CN210638051U (en) | 2020-05-29 |
Family
ID=70793829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921719446.4U Active CN210638051U (en) | 2019-10-14 | 2019-10-14 | Prevent useless burning furnace that burns of high efficiency danger of returning charge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210638051U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594757A (en) * | 2019-10-14 | 2019-12-20 | 科领环保股份有限公司 | High-efficiency hazardous waste incinerator capable of preventing material returning and method for preventing material returning |
-
2019
- 2019-10-14 CN CN201921719446.4U patent/CN210638051U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594757A (en) * | 2019-10-14 | 2019-12-20 | 科领环保股份有限公司 | High-efficiency hazardous waste incinerator capable of preventing material returning and method for preventing material returning |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110594757A (en) | High-efficiency hazardous waste incinerator capable of preventing material returning and method for preventing material returning | |
| CN201892216U (en) | Centralized waste incineration device with rotary vertical furnace | |
| CN100424415C (en) | Incineration treating method and system for gasifying and melting domestic waste from city | |
| CN106678830A (en) | Waste incineration flue gas and air system and incineration control method | |
| CN208398087U (en) | A kind of domestic garbage pyrolysis innoxious burning equipment | |
| CN106224974A (en) | Waste incineration processing system | |
| CN201903064U (en) | Plasma refuse incinerator | |
| CN210638051U (en) | Prevent useless burning furnace that burns of high efficiency danger of returning charge | |
| CN102563662A (en) | Plasma garbage furnace | |
| CN209893412U (en) | Combined combustion device for hazardous waste incineration line | |
| CN207815342U (en) | A kind of garbage burning boiler | |
| CN203880691U (en) | Chimney-free multifunctional oil/gas-fired boiler | |
| CN206347578U (en) | A kind of waste incineration air and gas system | |
| CN115143476A (en) | Adiabatic combustion double-slag-discharge boiler for incinerating garbage and working method thereof | |
| CN108826304A (en) | A kind of safe refuse disposal installation of environmental protection and energy saving | |
| CN211176825U (en) | Secondary combustion chamber for household garbage flue gas | |
| CN106705065A (en) | Mixed firing boiler of industrial waste and domestic waste | |
| CN210601596U (en) | Environment-friendly energy-saving biomass circulating fluidized bed boiler | |
| CN208090687U (en) | A kind of dual firing chamber's air inlet system | |
| CN206369213U (en) | The boiler that industrial refuse burns with domestic garbage mixing | |
| CN205710615U (en) | The pulverized coal gasification furnace that a kind of preheated air enters with eddy flow | |
| CN110822441A (en) | Efficient low-pollution combustion system of cyclone melting furnace for co-combustion of urban solid wastes | |
| CN205481007U (en) | Waste incinerator partly gasifies | |
| CN215675199U (en) | Be applied to burning furnace that burns of industry field of giving up useless admittedly | |
| CN216281425U (en) | Garbage incinerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |