CN101210678A - Sludge desiccation burning integral treatment method and device - Google Patents
Sludge desiccation burning integral treatment method and device Download PDFInfo
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- CN101210678A CN101210678A CNA2006101478675A CN200610147867A CN101210678A CN 101210678 A CN101210678 A CN 101210678A CN A2006101478675 A CNA2006101478675 A CN A2006101478675A CN 200610147867 A CN200610147867 A CN 200610147867A CN 101210678 A CN101210678 A CN 101210678A
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Abstract
A method of integrated treatment of sludge drying and incineration is provided, which comprises the follow steps of: feeding sludge into a rotary-type sludge dryer, introducing a part of moderate-temperature fume inside a fluidized bed incinerator into the rotary-type sludge dryer to heat and evaporate the water in the sludge, feeding the obtained semi-dried sludge into the fluidized bed incinerator; introducing the other part of moderate-temperature fume into an air pre-heater, heating the fist-stage and second-stage air of the fluidized bed incinerator, transferring parts of ash and bed media exhausted from the fluidized bed incinerator to the rotary-type sludge dryer, and mixing with the sludge inside the rotary-type sludge dryer. A device for implementing the method comprises a storage feed device, the rotary-type sludge dryer and the fluidized bed incinerator. The invention realizes the integrated treatment of drying and incineration; omits the intermediate links between the drying and incineration links, such as sludge cooling, sludge storage, sludge transportation and heat medium drying; simplifies the system; reduces the occupied area; and reduces the investment and cost.
Description
Technical field
The present invention relates to mechanical field, relate in particular to sludge drying, incinerator, concrete is a kind of sludge desiccation burning integral treatment method and device.
Background technology
Mud is solid-state, semisolid and the liquid product that sewage disposal process produces, and contains a large amount of organic matters, heavy metal and pathogenic bacteria and pathogen etc., handles and discharging arbitrarily if do not add, and can cause serious pollution to environment.In the prior art, sludge treatment method mainly adopts burning method, burning method has the advantage that processing speed is fast, harmless, the minimizing degree is high, particularly for the area of land resource scarcity, or the high trade effluent mud of poisonous and harmful substance content, burning is unique effective processing mode, and the sludge incineration technology mainly contains fire grate incineration technology, rotary kiln incineration technology, vertical multi-sectional incineration technology and fluidized combustion technology etc.Before mud is carried out burning disposal, need with mud is carried out mummification.At present, sludge drying technique mainly contains rotary drum drying technique, fluid bed drying technique, butterfly drying technique, paddle formula drying technique, disc type drying technique and belt drying technique etc.But, in the prior art, two links of drying and incineration all are provided with respectively on process and equipment, and the conveyance conduit of mud storage and conveying device and mummification thermal medium also must be set between desiccation apparatus and incinerator, and increase corresponding power-equipment.Therefore have system complex in the drying and incineration processing procedure of the prior art, reliability is low, heat loss is big, the thermal efficiency is low, equipment is many, occupation of land is big, cost is high, the technical problem more than conveying process and the auxiliary device.
Summary of the invention
The purpose of this invention is to provide a kind of sludge desiccation burning integral treatment method, described this sludge desiccation burning integral treatment method will solve in the sludge handling process of the prior art, and the drying and incineration link is separated on process and equipment, system complex, reliability is low, heat loss is big, the thermal efficiency is low, equipment is many, occupation of land is big, cost is high, conveying process and the many technical problems of auxiliary device.
This sludge desiccation burning integral treatment method of the present invention, comprise a step of utilizing the fluidized bed combustion device burning and processing sludge, wherein, before the described step of utilizing the fluidized bed combustion device burning and processing sludge is carried out, mud is transported in the rotary type sludge desiccation apparatus, warm flue gas in the dilute-phase zone upper space of fluidized bed combustion device is incorporated in the described rotary type sludge desiccation apparatus, moisture in the utilization in the warm flue gas heating evaporation mud, the half-driedization mud that obtains is sent in the fluidized bed combustion device, in the described step of utilizing the fluidized bed combustion device burning and processing sludge, to be transported to the dilute-phase zone upper space of fluidized bed combustion device from the low-temperature flue gas that contains organic exhaust gas in the described rotary type sludge desiccation apparatus by the flue gas recirculation blower fan, part in the warm flue gas in the burning generation is transported in the described rotary type sludge desiccation apparatus, another part in the warm flue gas in the burning generation is transported in the air preheater, to one of fluidized bed combustion device, secondary wind heats.
Further, in the described step of utilizing the fluidized bed combustion device burning and processing sludge, part lime-ash and bed material that fluidized bed combustion device is discharged are transported in the described rotary type sludge desiccation apparatus, and carry out blending in the mud in the rotary type sludge desiccation apparatus.
Further, in mud being transported to described rotary type sludge desiccation apparatus before, utilize the warehousing charging gear to store mud.
Further, in the described step of utilizing the fluidized bed combustion device burning and processing sludge, by regulate the flue gas recirculation blower fan regulate in the circulating ratio of warm flue gas.
Further, cold air is passed in the pipeline of described air preheater, utilization is arranged in the space of pipeline that cyclone separator in the fluidized bed combustion device outputs to flue gas in air preheater, utilize the cold air in this flue gas heating air preheater pipeline, utilize the air after airduct and secondary air channel will heat to be passed in the fluidized bed combustion device then.
The present invention also provides a kind of device of realizing above-mentioned sludge desiccation burning integral treatment method, described this sludge desiccation burning integral treating apparatus is by the warehousing charging gear, rotary type sludge desiccation apparatus and fluidized bed combustion device constitute, wherein, described rotary type sludge desiccation apparatus is by screw(-type) feeder, the swinging cylindrical shell is configured to propping up, described screw(-type) feeder has a feed end and a discharge end, described swinging cylindrical shell is arranged in the described support, the front end of swinging cylindrical shell is connected with the discharge end of screw(-type) feeder, described warehousing charging gear is connected with the feed end of screw(-type) feeder, the front end of swinging cylindrical shell is provided with an exhanst gas outlet, be connected with flue on the described exhanst gas outlet, be provided with a flue gas recirculation blower fan in the flue, one end of flue is communicated with the dilute-phase zone upper space of fluidized bed combustion device, be provided with a smoke inlet in the back outlet of swinging cylindrical shell, be arranged at intervals with a plurality of inner fins on the inwall circumference of swinging cylindrical shell, the length direction of any one described inner fin all is parallel to the axial of swinging cylindrical shell, axially be provided with a shaft along it in the swinging cylindrical shell, described shaft is provided with stirring vane, and shaft is connected with driving mechanism with Bearning mechanism.
Further, be provided with a vertical body of heater in the described fluidized bed combustion device, the inside of described body of heater is respectively arranged with emulsion zone from bottom to up, three zones of dilute-phase zone lower space and dilute-phase zone upper space, one side of body of heater is provided with a cyclone separator, the inlet of described cyclone separator is connected with the top of fluidized bed combustion device, the emulsion zone of body of heater is led in the following outlet of cyclone separator, the upper outlet of cyclone separator leads to the exhanst gas outlet of fluidized bed combustion device by discharge duct, the bottom of the emulsion zone of body of heater is provided with scum pipe, the downside of emulsion zone is provided with an air compartment, described air compartment is provided with an air distribution plate, the downside of air compartment is connected with airduct one time, the upside of emulsion zone is connected with secondary air channel, one time airduct is connected with a cool air inlet by air preheater with secondary air channel, and can make progress from air compartment from a wind of an airduct is blown into the emulsion zone of body of heater by air distribution plate.
Further, side at described rotary type sludge desiccation apparatus is provided with a flue gas recirculation blower fan, the exhanst gas outlet of rotary type sludge desiccation apparatus leads to the air inlet of flue gas recirculation blower fan by the flue gas recirculation pipeline, and described flue gas recirculation fan outlet leads to the dilute phase region upper space of described body of heater inside by the flue gas recirculation pipeline.
Further, be provided with an air preheater between a described airduct and secondary air channel and the cool air inlet, the fume side of described air preheater is connected with described exhanst gas outlet.
Further, a side of described fluidized bed combustion device is provided with auxiliary coal feeder.
Operation principle of the present invention is: dewatered sludge enters the rotary type sludge desiccation apparatus through the warehousing charging gear, and this device is arranged in the top of fluidized bed combustion device front wall, the charging gear of double as sludge incinerator; Sludge drying required in warm flue gas from the dilute-phase zone upper space of fluidized bed combustion device, dewatered sludge in desiccation apparatus with the direct contact heat-exchanging of middle temperature flue gas, mud moisture in moving process constantly evaporates, and the half-driedization mud that obtains directly enters fluidized bed combustion device; Half-driedization mud at first in the emulsion zone burning of fluidized bed combustion device, enters the dilute-phase zone lower space then, further after-flame under the strong disturbance of secondary wind is mixed; The low-temperature flue gas that contains organic exhaust gas that comes out from the rotary type sludge desiccation apparatus is got back to the dilute-phase zone upper space of fluidized bed combustion device again by the flue gas recirculation blower fan, at this regional organic exhaust gas that burns on the one hand in the flue gas recycled, solve the handling problem of the organic exhaust gas of mud drying process release, mix warm flue gas in obtaining with the high-temperature flue gas that sludge incineration produces simultaneously; In a warm flue gas part enter sludge drying device dewatered sludge, another part is then by the required primary and secondary air of air preheater heating flame, discharge behind the recovery waste heat, the circulating ratio that wherein enters the middle temperature flue gas of desiccation apparatus can be regulated by the flue gas recirculation blower fan, to adapt to the drying and incineration of different solid contents, different calorific value mud; Lime-ash that fluidized bed combustion device is discharged and bed material part are transmitted back in the sludge drying device carries out blending with dewatered sludge, to solve the sticking wall problem in the mud drying process.
The present invention and prior art compare, and its effect is actively with tangible.The present invention utilizes the rotary type sludge desiccation apparatus to be the fluidized bed combustion device feed, in the rotary type sludge desiccation apparatus, utilize the hot flue gas of fluidized bed combustion device that mud is carried out mummification, realized mummification-burning integral, the intermediate links such as conveying of mud cooling, storage, conveying and mummification thermal medium between the drying and incineration have been saved, system simplification, occupation of land reduce, reduced cost of investment, heat loss reduces, saved the Auxiliary Power Unit of intermediate link, improve the operational reliability of system, reduced operating cost; Realize the after-flame of the organic exhaust gas that produces in the drying process, need not to be provided with independent organic waste gas treatment equipment; Circulating ratio by warm flue gas in regulating can adapt to the mummification of different solid contents, different calorific value mud.
Description of drawings:
Fig. 1 is the schematic diagram of an embodiment of the sludge desiccation burning integral treating apparatus among the present invention.
The specific embodiment:
As shown in Figure 1, sludge desiccation burning integral treatment method of the present invention, comprise a step of utilizing fluidized bed combustion device 6 burning and processing sludges, wherein, before the described step of utilizing fluidized bed combustion device 6 burning and processing sludges is carried out, mud is transported in the rotary type sludge desiccation apparatus 2, warm flue gas in the dilute-phase zone upper space of fluidized bed combustion device 6 is incorporated in the described rotary type sludge desiccation apparatus 2, moisture in the utilization in the warm flue gas heating evaporation mud, the half-driedization mud that obtains is sent in the fluidized bed combustion device 6, in the described step of utilizing fluidized bed combustion device 6 burning and processing sludges, to be transported to the dilute-phase zone upper space of fluidized bed combustion device 6 from the low-temperature flue gas that contains organic exhaust gas in the described rotary type sludge desiccation apparatus 2 by the flue gas recirculation blower fan, part in the warm flue gas in the burning generation is transported in the described rotary type sludge desiccation apparatus 2, another part in the warm flue gas in the burning generation is transported in the air preheater 11, to one of fluidized bed combustion device 6, secondary wind heats.
Further, in the described step of utilizing fluidized bed combustion device 6 burning and processing sludges, part lime-ash and bed material that fluidized bed combustion device 6 is discharged are transported in the described rotary type sludge desiccation apparatus 2, and carry out blending in the mud in the rotary type sludge desiccation apparatus 2.
Further, in mud being transported to described rotary type sludge desiccation apparatus 2 before, utilize warehousing charging gear 1 to store mud.
Further, in the described step of utilizing fluidized bed combustion device 6 burning and processing sludges, by regulate flue gas recirculation blower fan 3 regulate in the circulating ratio of warm flue gas.
Further, cold air is passed in the pipeline of described air preheater 11, utilization is arranged in the space of pipeline that cyclone separator 7 in the fluidized bed combustion device 6 outputs to flue gas in air preheater 11, utilize the cold air in this flue gas heating air preheater 11 pipelines, utilize the air after airduct 9 and secondary air channel 8 will heat to be passed in the fluidized bed combustion device 6 then.
The present invention also provides a kind of device of realizing above-mentioned sludge desiccation burning integral treatment method, described this sludge desiccation burning integral treating apparatus is by warehousing charging gear 1, rotary type sludge desiccation apparatus 2 and fluidized bed combustion device 6 constitute, wherein, described rotary type sludge desiccation apparatus 2 is by screw(-type) feeder, the swinging cylindrical shell is configured to propping up, described screw(-type) feeder has a feed end and a discharge end, described swinging cylindrical shell is arranged in the described support, the front end of swinging cylindrical shell is connected with the discharge end of screw(-type) feeder, described warehousing charging gear 1 is connected with the feed end of screw(-type) feeder, the front end of swinging cylindrical shell is provided with an exhanst gas outlet, be connected with flue on the described exhanst gas outlet, be provided with a flue gas recirculation blower fan in the flue, one end of flue is communicated with the dilute-phase zone upper space of fluidized bed combustion device 6, be provided with a smoke inlet in the back outlet of swinging cylindrical shell, be arranged at intervals with a plurality of inner fins on the inwall circumference of swinging cylindrical shell, the length direction of any one described inner fin all is parallel to the axial of swinging cylindrical shell, axially be provided with a shaft along it in the swinging cylindrical shell, described shaft is provided with stirring vane, and shaft is connected with driving mechanism with Bearning mechanism.
Further, described fluidized bed combustion device 6 is provided with a body of heater longitudinally, the outlet of described rotary type sludge desiccation apparatus 2 one ends is arranged at the top of described body of heater and leads to body of heater inside, described warehousing charging gear 11 is connected with the import of described rotary type sludge desiccation apparatus 2 other ends, the inside of described body of heater is respectively arranged with emulsion zone 602 from bottom to up, 604 3 zones of dilute-phase zone lower space 603 and dilute-phase zone upper space, one side of described body of heater also is provided with a cyclone separator 7, the inlet of described cyclone separator 7 is connected with the top of fluidized bed combustion device 6, the emulsion zone 602 of body of heater is led in the following outlet of cyclone separator, the upper outlet of cyclone separator 7 leads to the exhanst gas outlet 13 of fluidized bed combustion device 6 by discharge duct, the bottom of the emulsion zone 602 of body of heater is provided with scum pipe 10, the downside of emulsion zone 602 is provided with an air compartment 601, described air compartment 601 is provided with an air distribution plate, the downside of air compartment 601 is connected with airduct 9 one time, the upside of emulsion zone 602 is connected with secondary air channel 8, one time airduct 9 is connected with a cool air inlet 12 by air preheater 11 with secondary air channel 8, and can make progress from air compartment 601 from a wind of an airduct 9 is blown into the emulsion zone 602 of body of heater by air distribution plate.
Further, side at described rotary type sludge desiccation apparatus 2 is provided with a flue gas recirculation blower fan 3, the exhanst gas outlet of rotary type sludge desiccation apparatus 2 leads to the air inlet of flue gas recirculation blower fan 3 by flue gas recirculation pipeline 4, and described flue gas recirculation blower fan 3 air outlets lead to the dilute phase region upper space 604 of described body of heater inside by flue gas recirculation pipeline 4.
Further, be provided with an air preheater 11 between a described airduct 9 and secondary air channel 8 and the cool air inlet 12, the fume side of described air preheater 11 is connected with described exhanst gas outlet 13.
Further, a side of described fluidized bed combustion device 6 is provided with auxiliary coal feeder 5.
This sludge desiccation burning integral treatment method of the present invention is achieved in that dewatered sludge by 2 mummification of rotary type sludge desiccation apparatus, by with middle temperature smoke contact heat exchange, evaporate moisture, the half-driedization mud that obtains enters fluidized bed combustion device 6 burnings, half-driedization mud at first burns at the emulsion zone 602 of incinerator 6, emulsion zone 602 bottoms are combustion-supporting by wind of airduct 9 introducings, enter dilute-phase zone lower space 603 then, and under the strong disturbance of the secondary wind of secondary air channel 8 input is mixed further after-flame, sludge drying required in warm flue gas draw the dilute-phase zone upper space 604 of self-fluidized type bed incinerator 6.Warm flue gas is discharged behind the recovery waste heat by the primary and secondary air heating that air preheater 11 will burn required from the part that introduce on the dilute-phase zone top 604 of fluidized bed combustion device 6.Further, expect partly to be transmitted back to the sludge drying device 2 to carry out blending from lime-ash and bed that fluidized bed combustion device 6 is discharged, to solve the sticking wall problem in the mud drying process with dewatered sludge.
Claims (10)
1. sludge desiccation burning integral treatment method, comprise a step of utilizing the fluidized bed combustion device burning and processing sludge, it is characterized in that: before the described step of utilizing the fluidized bed combustion device burning and processing sludge is carried out, mud is transported in the rotary type sludge desiccation apparatus, warm flue gas in the dilute-phase zone upper space of fluidized bed combustion device is incorporated in the described rotary type sludge desiccation apparatus, moisture in the utilization in the warm flue gas heating evaporation mud, the half-driedization mud that obtains is sent in the fluidized bed combustion device, in the described step of utilizing the fluidized bed combustion device burning and processing sludge, to be transported to the dilute-phase zone upper space of fluidized bed combustion device from the low-temperature flue gas that contains organic exhaust gas in the described rotary type sludge desiccation apparatus by the flue gas recirculation blower fan, part in the warm flue gas in the mixing generation is transported in the described rotary type sludge desiccation apparatus, another part in the warm flue gas in mix producing is transported in the air preheater, the wind and the secondary wind of fluidized bed combustion device is heated.
2. sludge desiccation burning integral treatment method as claimed in claim 1, it is characterized in that: in the described step of utilizing the fluidized bed combustion device burning and processing sludge, part lime-ash and bed material that fluidized bed combustion device is discharged are transported in the described rotary type sludge desiccation apparatus, and carry out blending in the mud in the rotary type sludge desiccation apparatus.
3. sludge desiccation burning integral treatment method as claimed in claim 1 is characterized in that: before in mud being transported to described rotary type sludge desiccation apparatus, utilize the warehousing charging gear to store mud.
4. sludge desiccation burning integral treatment method as claimed in claim 1 is characterized in that: in the described step of utilizing the fluidized bed combustion device burning and processing sludge, by regulate the flue gas recirculation blower fan regulate in the circulating ratio of warm flue gas.
5. sludge desiccation burning integral treatment method as claimed in claim 1, it is characterized in that: cold air is passed in the pipeline of described air preheater, utilization is arranged in the space of pipeline that cyclone separator in the fluidized bed combustion device outputs to flue gas in air preheater, utilize the cold air in this flue gas heating air preheater pipeline, utilize the air after airduct and secondary air channel will heat to be passed in the fluidized bed combustion device then.
6. device of realizing sludge desiccation burning integral treatment method as claimed in claim 1, by the warehousing charging gear, rotary type sludge desiccation apparatus and fluidized bed combustion device constitute, it is characterized in that: described rotary type sludge desiccation apparatus is by screw(-type) feeder, the swinging cylindrical shell is configured to propping up, described screw(-type) feeder has a feed end and a discharge end, described swinging cylindrical shell is arranged in the described support, the front end of swinging cylindrical shell is connected with the discharge end of screw(-type) feeder, described warehousing charging gear is connected with the feed end of screw(-type) feeder, the front end of swinging cylindrical shell is provided with an exhanst gas outlet, be connected with flue on the described exhanst gas outlet, be provided with a flue gas recirculation blower fan in the flue, one end of flue is communicated with the dilute-phase zone upper space of fluidized bed combustion device, be provided with a smoke inlet in the back outlet of swinging cylindrical shell, be arranged at intervals with a plurality of inner fins on the inwall circumference of swinging cylindrical shell, the length direction of any one described inner fin all is parallel to the axial of swinging cylindrical shell, axially be provided with a shaft along it in the swinging cylindrical shell, described shaft is provided with stirring vane, and shaft is connected with driving mechanism with Bearning mechanism.
7. sludge desiccation burning integral treating apparatus as claimed in claim 6, it is characterized in that: be provided with a vertical body of heater in the described fluidized bed combustion device, the inside of described body of heater is respectively arranged with emulsion zone from bottom to up, three zones of dilute-phase zone lower space and dilute-phase zone upper space, one side of body of heater is provided with a cyclone separator, the inlet of described cyclone separator is connected with the top of fluidized bed combustion device, the emulsion zone of body of heater is led in the following outlet of cyclone separator, the upper outlet of cyclone separator leads to the exhanst gas outlet of fluidized bed combustion device by discharge duct, the bottom of the emulsion zone of body of heater is provided with scum pipe, the downside of emulsion zone is provided with an air compartment, described air compartment is provided with an air distribution plate, the downside of air compartment is connected with airduct one time, the upside of emulsion zone is connected with secondary air channel, and one time airduct is connected with a cool air inlet by air preheater with secondary air channel.
8. sludge desiccation burning integral treating apparatus as claimed in claim 6, it is characterized in that: the side at described rotary type sludge desiccation apparatus is provided with a flue gas recirculation blower fan, the exhanst gas outlet of rotary type sludge desiccation apparatus leads to the air inlet of flue gas recirculation blower fan by the flue gas recirculation pipeline, and described flue gas recirculation fan outlet leads to the dilute phase region upper space of described body of heater inside by the flue gas recirculation pipeline.
9. sludge desiccation burning integral treating apparatus as claimed in claim 7, it is characterized in that: be provided with an air preheater between a described airduct and secondary air channel and the cool air inlet, the fume side of described air preheater is connected with described exhanst gas outlet.
10. sludge desiccation burning integral treating apparatus as claimed in claim 6 is characterized in that: a side of described fluidized bed combustion device is provided with auxiliary coal feeder.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101478675A CN100557312C (en) | 2006-12-25 | 2006-12-25 | A kind of sludge desiccation burning integral treatment method and device |
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| CNB2006101478675A CN100557312C (en) | 2006-12-25 | 2006-12-25 | A kind of sludge desiccation burning integral treatment method and device |
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| CN101210678A true CN101210678A (en) | 2008-07-02 |
| CN100557312C CN100557312C (en) | 2009-11-04 |
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