CN101782236A - Method and device capable of inhibiting refuse incineration from generating dioxins - Google Patents
Method and device capable of inhibiting refuse incineration from generating dioxins Download PDFInfo
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- CN101782236A CN101782236A CN 201010116761 CN201010116761A CN101782236A CN 101782236 A CN101782236 A CN 101782236A CN 201010116761 CN201010116761 CN 201010116761 CN 201010116761 A CN201010116761 A CN 201010116761A CN 101782236 A CN101782236 A CN 101782236A
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Abstract
The invention relates to a method and a device capable of inhibiting refuse incineration from generating dioxins, which belongs to the field of environmental protection. The device is mainly characterized in that the hearth of the refuse incinerator is communicated with the hearth of a secondary heating furnace through a flue, a flue partition wall is arranged in the hearth of the secondary heating furnace, and a temperature measuring point is arranged in front of the furnace. The method mainly comprises the following steps: when being started or shut down, the refuse incinerator combusts part of coal, so that the furnace temperature is kept above 800 DEG C; fume, which is generated in the process of refuse incineration, directly enters the hearth of the secondary heating furnace through the flue to be combusted for the second time, under the monitoring control of the temperature measuring point, the furnace temperature is kept at 1100-1300 DEG C all the time by adjusting the fuel usage, and the fume can be stayed for more than 3 seconds, so that the dioxins in the fume are completely decomposed; and after being subject to secondary heating, the fume enters the convective region from the hearth to be processed in a convective heat exchange mode, and is discharged through the vertical shaft flue and the fume outlet on the tail of the vertical shaft flue. The invention has the advantages of obvious effects on inhibiting and eliminating dioxins, low operating cost and simple technological operation.
Description
Technical field
Belong to field of environment protection, relate to a kind of equipment that utilizes rubbish to act as a fuel, particularly a kind of boiler of burning away the refuse.
Technical background:
At present adopt the burning mode that rubbish is handled in the world, the grate furnaces that adopt more, its rubbish is directly burning in burner hearth, furnace temperature is wayward in combustion process, when furnace temperature is lower than 800 ℃, especially when 400 ℃ of left and right sides, because chloride rubbish imperfect combustion very easily generates huge poisonous substance dioxin; Conventional purification method to flue gas is to adopt electrostatic precipitator or cyclone separator or wet type, dry collector or the organic cooperation of several deduster, flue gas is handled, enter atmosphere by chimney then, these methods all can not effectively go out dioxin clearly, the employing that has in recent years sprays into active carbon powder in flue gas, and then will from flue gas, separate with the active carbon powder of dioxin, send into combustion chambers burn to reduce the discharging of dioxin, as: the Chinese patent publication number is CN1246597A, open day is on March 8th, 2000, and denomination of invention is " process for treating dioxin in the waste gas generated by burning garbage "; This application discloses, and in the flue gas that waste incineration produces, at first removes dust through wet scrubber, sprays into active carbon powder again, absorption is had the active carbon end of dioxin to separate from flue gas again, sends into combustion chambers burn.Though the method can reduce the outside discharging of harmful substances such as dioxin, but the weak point of this method is: a, at waste incineration initial stage and flame-out later stage because the low incineration firing of temperature is insufficient, contain a large amount of dioxin in the flue gas, though, still have a large amount of dioxin and enter atmosphere through the activated carbon powder absorption; The flue gas purifying equipment of b, employing is more relatively, bigger, and the nuisances such as dioxin to existing in the flue gas, can not remove fully, still need establish taller and bigger chimney and outwards discharge; C, utilize activated carbon powder absorption dioxin cost height, and the active carbon after using can't regenerate, become a new malicious source, again must handled.
Summary of the invention
Purpose of the present invention is exactly for deficiency that solves prior art and defective, proposes the method and apparatus that a kind of processing step is easy, equipment drops into the suppressed refuse incineration from generating dioxins that expense is less relatively, operating cost is low.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method that suppresses refuse incineration from generating dioxins the steps include:
A, incinerator are when the beginning starting operation, and for avoiding producing a large amount of dioxin, at the beginning of starting, the burning part of coal is brought up to fire box temperature more than 800 ℃ by normal temperature, and utilize clamshell crane that rubbish is sent into the incinerator hopper this moment, prepares to burn;
B, when starting incinerator, the secondary heating furnace coupled by flue also starts simultaneously, secondary heating furnace can adopt coal or other natural fuel, and furnace temperature is risen to more than 1100 ℃;
C, treat that incinerator and secondary heating furnace furnace temperature begin to burn away the refuse after stable;
D, the flue gas that waste incineration is produced, under the traction of air-introduced machine, entering the secondary heating furnace burner hearth by flue burns once more, this moment by temperature point monitoring and adjust firing rate all the time with Control for Kiln Temperature between 1100 ℃-1300 ℃, and make flue gas under this temperature, the time of staying remained on more than 3 seconds, and the dioxin in the flue gas is decomposed fully;
E, flue gas enter the convective region from burner hearth after post bake, the temperature of flue gas was reduced to below 300 ℃ in the extremely short time, and flue gas enters vertical well gas flue behind heat convection, after the back-end surfaces heat exchange, are discharged by the tail flue gas outlet;
F, when the incinerator blowing out, stopped to carry garbage fuel in stove in 2 hours in advance, changing delivers coal waits natural fuel, up to rubbish by complete after-flame, to reduce the generation of dioxin, the furnace outage time of secondary heating furnace is than half an hour time lag of incinerator blowing out.
A kind of equipment that suppresses the method for refuse incineration from generating dioxins comprises: incinerator and post bake furnace body is characterized in that:
A, incinerator and secondary heating furnace are arranged side by side, and the refuse furnace exhanst gas outlet of incinerator burner hearth top directly is connected by the secondary heating furnace smoke inlet of flue with secondary heating furnace burner hearth afterbody;
B, be provided with temperature point in the secondary heating furnace stokehold;
C, 2-5 road mid-feather is set in secondary heating furnace aditus laryngis upper furnace;
3 road mid-feathers are set for best in secondary heating furnace aditus laryngis upper furnace;
In addition, the forward and backward spring base of incinerator burner hearth from setting, shorter than the distance of the known traditional forward and backward arch of incinerator, and be provided with around secondary air box around in the arch, on around secondary air box, be provided with overfire air jet; The secondary heating furnace burner hearth is by secondary heating furnace burner hearth exhanst gas outlet, directly be connected with the convection bank district, the convection bank district is connected with vertical well gas flue by the convection bank exhanst gas outlet, is provided with back-end surfaces in vertical well gas flue, is provided with the tail flue gas outlet at the vertical well gas flue end.
Because the present invention has adopted technique scheme, its beneficial effect is:
A, owing to, adopt coal combustion that furnace temperature is remained on more than 800 ℃ always at the early stage and the later stage of waste incineration operation, fundamentally avoided about 400 ℃ the temperature field that chlorine bulkiness volume production is given birth to, suppressed the formation of dioxin; B, suitably dwindle the distance of the forward and backward arch of incinerator, and around chimney arch, be provided with, increased the dynamics of secondary wind, strengthened air agitation, form good aerodynamic field, guaranteed that flue gas fully burns and the after-flame of fugitive constituent in throat around secondary wind; C, secondary heating furnace is set the flue gas that combustion refuse produces is heated once more, the dioxin that exists in the flue gas is all decomposed.This invention suppresses and elimination dioxin effect is remarkable, operating cost is low, technological operation is easy.
Description of drawings
Fig. 1 is this invention structural representation
Fig. 2 is the A-A cutaway view of Fig. 1
Fig. 3 is the B-B cutaway view of Fig. 2
Fig. 4 is around the secondary air box schematic diagram
Wherein: 1-tail flue gas outlet 2-vertical well gas flue 3-back-end surfaces 4-convection bank exhanst gas outlet 5-convection bank 6-secondary heating furnace burner hearth exhanst gas outlet 7-flue 8-refuse furnace exhanst gas outlet 9-secondary heating furnace smoke inlet 10-secondary heating furnace mid-feather 11-secondary heating furnace burner hearth 12-secondary heating furnace fire grate 13-Secondary Air air channel 14-incinerator burner hearth 15-overfire air fan 16-is around secondary air box 17-garbage incinerator grates 18-waste incineration batch hopper 19-secondary heating furnace rear arch 20-post bake batch hopper 21-secondary heating furnace Secondary Air airduct 22-overfire air jet 23-temperature point
The specific embodiment
Bottom reaches embodiment in conjunction with the accompanying drawings the technical program is described further:
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, incinerator and secondary heating furnace are arranged side by side, the flue gas of garbage furnace outlet 8 of incinerator burner hearth 14 tops directly is connected with flue 7, and flue 7 other ends are connected with the secondary heating furnace smoke inlet 9 of secondary heating furnace burner hearth afterbody; Be provided with around the incinerator chimney arch around secondary air box 16, the distance of its forward and backward arch is shorter than the distance of arch before and after traditional incinerator; Incinerator with day disposal of refuse 200t is an example, and distance of arch is 1.1m before and after it; The place is provided with temperature point 23 at post bake furnace body front wall, is used to monitor fire box temperature, and the time that stops in secondary heating furnace burner hearth 11 according to flue gas of garbage furnace flow and flue gas is provided with 2-5 road secondary heating furnace mid-feather 10;
Incinerator is when the beginning starting operation, for avoiding producing a large amount of dioxin, at the beginning of starting, the burning part of coal, burner hearth 6 temperature are brought up to more than 800 ℃ by normal temperature, and the rubbish that utilize clamshell crane will be heated, dry this moment is sent into the incinerator hopper, prepares to burn;
When starting incinerator, also start simultaneously by flue 7 coupled secondary heating furnace, secondary heating furnace can adopt coal or other natural fuels, and furnace temperature is risen to more than 1100 ℃;
Treat that incinerator and secondary heating furnace furnace temperature begin to burn away the refuse after stable;
Flue gas with the waste incineration generation, entering secondary heating furnace burner hearth 11 by flue 7 burns once more, furnace temperature in this moment secondary heating furnace burner hearth 11, by temperature point 23 monitoring and adjust firing rate all the time with Control for Kiln Temperature between 1100 ℃-1300 ℃, and make flue gas under this temperature, the time of staying remained on more than 3 seconds, and the dioxin in the flue gas is decomposed fully;
Flue gas directly is connected with the convection bank district by secondary heating furnace burner hearth exhanst gas outlet 6 after post bake, and flue gas was reduced to below 300 ℃ in the extremely short time, flue gas is behind heat convection, enter vertical well gas flue 2, after back-end surfaces 3 heat exchange, discharge through tail flue gas outlet 1;
When the incinerator blowing out, stopped in stove, to carry garbage fuel in 2 hours in advance, change and deliver coal or other natural fuel, to reduce the generation of dioxin, the furnace outage time of secondary heating furnace is than half an hour time lag of incinerator blowing out.
Claims (7)
1. the method that can suppress refuse incineration from generating dioxins the steps include:
A, incinerator are when the beginning starting operation, and for avoiding producing a large amount of dioxin, at the beginning of starting, the burning part of coal is brought up to burner hearth 6 temperature more than 800 ℃ by normal temperature, and utilize clamshell crane that rubbish is sent into the incinerator hopper this moment, prepares to burn;
B, when starting incinerator, the secondary heating furnace coupled by flue also starts simultaneously, secondary heating furnace can adopt coal or other natural fuel, and furnace temperature is risen to more than 1100 ℃;
C, treat that incinerator and secondary heating furnace furnace temperature begin to burn away the refuse after stable;
D, the flue gas that waste incineration is produced, under the traction of air-introduced machine, entering the secondary heating furnace burner hearth by flue burns once more, the furnace temperature of this moment, by temperature point monitoring and adjust firing rate all the time with Control for Kiln Temperature between 1100 ℃-1300 ℃, and making flue gas under this temperature, the time of staying remained on more than 3 seconds, and the dioxin in the flue gas is decomposed fully;
E, flue gas enter the convective region from burner hearth after post bake, the temperature of flue gas was reduced to below 300 ℃ in the extremely short time, and flue gas enters vertical well gas flue behind heat convection, after the back-end surfaces heat exchange, are discharged by the tail flue gas outlet;
F, when the incinerator blowing out, stopped to carry garbage fuel in stove in 2 hours in advance, changing delivers coal waits natural fuel, up to rubbish by complete after-flame, to reduce the generation of dioxin, the furnace outage time of secondary heating furnace lags behind half an hour than the furnace outage time of incinerator blowing out.
2. a kind of equipment that suppresses the method for refuse incineration from generating dioxins as claimed in claim 1 comprises: incinerator and post bake furnace body is characterized in that:
A, incinerator and secondary heating furnace are arranged side by side, and the refuse furnace exhanst gas outlet (8) of incinerator burner hearth (14) top directly is connected by the secondary heating furnace smoke inlet (9) of flue (7) with secondary heating furnace burner hearth (11) afterbody;
B, be provided with temperature point (23) in the secondary heating furnace stokehold
C, 2-5 road mid-feather (10) is set in secondary heating furnace aditus laryngis upper furnace.
3. a kind of equipment that suppresses the method for refuse incineration from generating dioxins as claimed in claim 2 is characterized in that: 3 road mid-feathers (10) are set in secondary heating furnace aditus laryngis upper furnace.
4. a kind of equipment that suppresses the method for refuse incineration from generating dioxins as claimed in claim 2, it is characterized in that: the forward and backward spring base of incinerator burner hearth (14) from setting, distance than the known traditional forward and backward arch of incinerator is short, and be provided with around in the arch around secondary air box (16), on around secondary air box (16), be provided with overfire air jet (22).
5. a kind of equipment that suppresses the method for refuse incineration from generating dioxins as claimed in claim 3, it is characterized in that: the forward and backward spring base of incinerator burner hearth (14) from setting, distance than the known traditional forward and backward arch of incinerator is short, and be provided with around in the arch around secondary air box (16), on around secondary air box (16), be provided with overfire air jet (22).
6. a kind of equipment that suppresses the method for refuse incineration from generating dioxins as claimed in claim 2, it is characterized in that: secondary heating furnace burner hearth (11) directly is connected with the convection bank district by secondary heating furnace burner hearth exhanst gas outlet (6), the convection bank district is connected with vertical well gas flue (2) by convection bank exhanst gas outlet (4), in vertical well gas flue (2), be provided with back-end surfaces (3), be provided with tail flue gas outlet (1) at vertical well gas flue (2) end.
7. a kind of equipment that suppresses the method for refuse incineration from generating dioxins as claimed in claim 5, it is characterized in that: secondary heating furnace burner hearth (11) directly is connected with the convection bank district by secondary heating furnace burner hearth exhanst gas outlet (6), the convection bank district is connected with vertical well gas flue (2) by convection bank exhanst gas outlet (4), in vertical well gas flue (2), be provided with back-end surfaces (3), be provided with tail flue gas outlet (1) at vertical well gas flue (2) end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010116761 CN101782236A (en) | 2010-03-03 | 2010-03-03 | Method and device capable of inhibiting refuse incineration from generating dioxins |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010116761 CN101782236A (en) | 2010-03-03 | 2010-03-03 | Method and device capable of inhibiting refuse incineration from generating dioxins |
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| CN101782236A true CN101782236A (en) | 2010-07-21 |
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| CN 201010116761 Pending CN101782236A (en) | 2010-03-03 | 2010-03-03 | Method and device capable of inhibiting refuse incineration from generating dioxins |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104197341A (en) * | 2014-09-11 | 2014-12-10 | 陆骏 | Reciprocating type exhaust gas pyrolyzing furnace |
| CN104515124A (en) * | 2013-09-30 | 2015-04-15 | 贵州中烟工业有限责任公司 | Chain grate boiler |
| CN104877710A (en) * | 2015-06-11 | 2015-09-02 | 史金麟 | Flash multiple-bin gasification furnace |
| CN108019764A (en) * | 2016-11-02 | 2018-05-11 | 天津天控科技有限公司 | A kind of sludge incineration device |
| CN108036324A (en) * | 2018-01-15 | 2018-05-15 | 烟台龙源电力技术股份有限公司 | A kind of burning processing system and method |
| CN108826299A (en) * | 2018-07-06 | 2018-11-16 | 重庆世银科技有限公司 | Chain-belt type negative-pressure cyclic accumulation of heat incinerator |
| CN112393266A (en) * | 2020-11-20 | 2021-02-23 | 西安热工研究院有限公司 | System for heating garbage pit by utilizing flue gas waste heat in garbage incineration power station |
| TWI821601B (en) * | 2020-09-29 | 2023-11-11 | 台塑能源科技股份有限公司 | Fluidized bed incinerator waste gas treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104515124A (en) * | 2013-09-30 | 2015-04-15 | 贵州中烟工业有限责任公司 | Chain grate boiler |
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| CN104877710A (en) * | 2015-06-11 | 2015-09-02 | 史金麟 | Flash multiple-bin gasification furnace |
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| CN108019764A (en) * | 2016-11-02 | 2018-05-11 | 天津天控科技有限公司 | A kind of sludge incineration device |
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| TWI821601B (en) * | 2020-09-29 | 2023-11-11 | 台塑能源科技股份有限公司 | Fluidized bed incinerator waste gas treatment system |
| CN112393266A (en) * | 2020-11-20 | 2021-02-23 | 西安热工研究院有限公司 | System for heating garbage pit by utilizing flue gas waste heat in garbage incineration power station |
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Open date: 20100721 |