CN103145307B - High temperature carbonization system of sludge and carbonization process - Google Patents

High temperature carbonization system of sludge and carbonization process Download PDF

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Publication number
CN103145307B
CN103145307B CN201310112617.8A CN201310112617A CN103145307B CN 103145307 B CN103145307 B CN 103145307B CN 201310112617 A CN201310112617 A CN 201310112617A CN 103145307 B CN103145307 B CN 103145307B
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carbonization
dewatered sludge
sludge
furnace
mud
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CN201310112617.8A
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CN103145307A (en
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罗臻
钱鸣
张军发
杨海
刘景平
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中节能博实(湖北)环境工程技术有限公司
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Abstract

The invention provides a high temperature carbonization system of sludge and a carbonization process. The high temperature carbonization system of sludge comprises a dewatered sludge supply unit, a dewatered sludge drying unit, a dried sludge carbonization unit, a thermal cycle exchange unit, and a carbonization heating furnace, wherein the dewatered sludge drying unit comprises a dewatered sludge dryer; the dried sludge carbonization unit comprises a sludge carbonization furnace; the carbonization heating furnace is used for supplying the heating gas to the dewatered sludge dryer and used for supplying the heating gas to the sludge carbonization furnace; the thermal cycle exchange unit is used for conveying the heating gas discharged by the dewatered sludge drying unit to the carbonization heating furnace to burn and deodorize after heat exchange; and the carbonization heating furnace is used for burning and deodorizing the distilled gas generated by the sludge carbonization furnace by carbonization. By adopting the carbonization system, utilization of the carbonized distilled gas generated by the sludge in drying and carbonizing processes is combined with high-temperature deodorizing overall treatment of the waste gas; the energy consumption is reduced; and the equipment configuration is also simplified.

Description

Sludge high temperature carbonization system and carbonization technique

Technical field

The present invention relates to chemical field, relate in particular to a kind of extensive sludge high temperature carbonization system and carbonization technique that municipal sludge is processed that be adapted to.

Background technology

By the end of the year 2011, whole nation accumulative total is built up 3135 of urban wastewater treatment firms, and sewage treatment capacity reached for 1.36 billion cubic meter/days.Wherein, the town sewage processing project of building reaches 1360, approximately 2900 ten thousand stere/days of general design ability.Accumulative total 393.13 billion cubic meters of disposing of sewage in 2011, show, China's sludge yield in 2011 is 5,030,000 tons thus.Calculate according to this, estimate to the end of the year 2015, near 7,770,000 tons of the sludge yield of China.

The mud that sewage work produces is that water content is at 75~99% solid or liquid shape materials that do not wait.Solids component wherein is mainly comprised of organic relic, bacterium thalline, inorganic particle, colloid and flocculation institute with medicament etc., a kind ofly to take organic composition as main, the mixture of complicated components, wherein also includes organic matter, nitrogen (N), phosphorus (P), potassium (K) and the various trace element of potential utility value.If there is sanitary sewage in sewage, and include trade effluent, in mud, not only contain pathogenic bacteria, virus and parasite (ovum), also may have a series of pollution substances such as poisonous and hazardous organic substance of heavy metal and difficult degradation, it is the topmost potential secondary pollution source that sewage treatment process forms.

Domestic Sewage Plant is generally larger, and day is disposed of sewage ability between 50,000 tons-300,000 tons, produces 5 tons of wet sludge quantities calculate (water ratio 80%) according to every ten thousand tons of sewage, and mud day, generation was at 25-150 ton.What carried out sludge treatment disposal at present is mainly big and medium-sized cities, and the general mode of building regional centralized sludge disposal center that adopts, the mud of several Sewage Plant is focused on, and the wet mud scale of day processing is generally 100-400 ton left and right, and indivedual scales even reach nearly kiloton.Yet the mud carbonizing apparatus of current domestic introduction is subject to structural limitations, maximum processing capability is generally day to be processed in 100 tons, wet mud, cannot adapt to demestic user mud is adopted concentrate, the extensive demand of disposing.

At present, the sludge disposal of China mainly still be take agricultural use and sanitary landfill as main, and both account for respectively 46.43% and 35.71 of sludge disposal total amount.Yet, in the existing sewage treatment facility in the whole nation, include being less than it and processing 1/4 of total amount of mud stabilizing treatment facility.The subject matter that mud brings has: Organic pollutants and heavy metal contamination etc.And Sludge landfill also affects the landfill of domestic waste, it not only takies a large amount of effective soils, also can cause serious pollution to ground surface environment and groundwater resource, and pollutes soil structure and crop growth.Hence one can see that, and the problem that solves bad sludge disposal just can not fundamentally realize the improvement of water surrounding, causes serious problems will to China's urban ecological environment.

In sum, sludge problem how to deal carefully with, dispose a large amount of stackings has become domestic most sewage works urgent problem, is also the common topic of paying close attention in the whole world.

Summary of the invention

The technical problem to be solved in the present invention is: extensive sludge high temperature carbonization system and the carbonization technique that municipal sludge is processed that be adapted to that a kind of minimizing, innoxious, stabilization, resource utilization are provided.

The present invention solves the problems of the technologies described above taked technical scheme to be:

Sludge high temperature carbonization system, it is characterized in that, it comprises dewatered sludge feed unit, the dewatered sludge that described dewatered sludge feed unit is provided carries out the dewatered sludge mummification unit of mummification, mud after mummification is carried out to the dewatered sludge carbonation unit of carbonization, thermal cycling crosspoint, and carbonization process furnace, described dewatered sludge mummification unit comprises dewatered sludge drying machine, described dewatered sludge carbonation unit comprises mud carbide furnace, described carbonization process furnace is used for supplying with heated air to described dewatered sludge drying machine with sludge-drying and for supplying with heated air to described mud carbide furnace so that mud heats carbonization, described thermal cycling crosspoint is sent to the deodorization of burning of described carbonization process furnace for the heated air that described dewatered sludge mummification unit is discharged after heat exchange, described carbonization process furnace is for the deodorization of burning of carbonization produces to described mud carbide furnace carbonizing gas.

In such scheme, described dewatered sludge mummification unit also comprises tornado dust collector, dewatered sludge scraper conveyor and dewatered sludge storage warehouse, through the dried dewatered sludge of described dewatered sludge drying machine, via described dewatered sludge scraper conveyor, be transported in described dewatered sludge storage warehouse and store, the heated air that described dewatered sludge drying machine is discharged enters described thermal cycling crosspoint after tornado dust collector.

In such scheme, described dewatered sludge carbonation unit also comprises dewatered sludge worm conveyor and carbide conveying and storing apparatus, described dewatered sludge worm conveyor is for being delivered to described mud carbide furnace by the dewatered sludge of described dewatered sludge mummification unit output, and described carbide conveying and storing apparatus is carried and stores for the carbide that mud carbide furnace is formed.

In such scheme, described thermal cycling crosspoint also discharges after heat exchange for the heated air that described mud carbide furnace is discharged, described thermal cycling crosspoint comprises recirculation blower, induced draft fan, gas blower, one-level heat exchanger, and two-stage heat exchanger, the heated air that discharge described dewatered sludge mummification unit is sent to and is resent to the deodorization of burning of described carbonization process furnace after the heat exchange of described one-level heat exchanger by described recirculation blower, the heated air that described mud carbide furnace is discharged is after described one-level heat exchanger and two-stage heat exchanger heat exchange, emptying under the guiding of described induced draft fan again, described gas blower enters described carbonization process furnace after being used for blasting air and air fully being heated by described two-stage heat exchanger.

In such scheme, described mud carbide furnace comprises rotatable carbonization kettle, driving mechanism, be arranged on a plurality of flights of described carbonization inner wall of kettle, be arranged on described carbonization kettle mud entrance a plurality of flow deflectors, be looped around the urceolus of described carbonization kettle periphery, the dewatered sludge that described carbonization kettle transports for dewatered sludge mummification unit described in carbonization, described driving mechanism is used for driving the rotation of described carbonization kettle, thereby described urceolus is for holding heating medium to heat the dewatered sludge in carbonization kettle described in described carbonization kettle indirect heating.

In such scheme, described urceolus comprises independently heating chamber of multistage, and arrange along the axial direction due of described carbonization kettle described multistage heating chamber, and every section of heating chamber is provided with hot blast import and hot-blast outlet.

In such scheme, described mud carbide furnace also includes temperature control unit, described temperature control unit comprises at least one first temperature control component and a plurality of the second temperature control component, described a plurality of the first temperature control component is the temperature in carbonization mud process for detection of described carbonization kettle, and regulate described driving mechanism to drive the rotating speed of described carbonization kettle rotation according to described temperature, described a plurality of the second temperature control component is for detection of the temperature of every section of heating chamber, and according to described temperature, regulates air output and the inlet temperature of described hot blast import.

Sludge high temperature carbonization technique, it comprises the following steps:

1) dewatered sludge is delivered in dewatered sludge drying machine;

2) carbonization process furnace supply heated air directly contacts with the dewatered sludge in dewatered sludge drying machine, moisture percentage in sewage sludge is dropped to 30%, the heated air of discharging from dewatered sludge drying machine, after cyclone dust removal, is undertaken entering carbonization process furnace burning deodorization after heat exchange by thermal cycling crosspoint;

3) the dried dewatered sludge of dewatered sludge drying machine is delivered in mud carbide furnace, carbonization process furnace is supplied with heated air to mud carbide furnace, dewatered sludge in mud carbide furnace through high temperature, the anaerobic treatment of 600 ~ 800 ℃, separate out that most moisture and flammable minute component are final forms stable carbonized product, the carbonizing gas that in mud carbide furnace, carbonization produces exports the deodorization of burning of carbonization process furnace to.

In such scheme, described mud carbide furnace comprises rotatable carbonization kettle, driving mechanism, be arranged on a plurality of flights of described carbonization inner wall of kettle, be arranged on described carbonization kettle mud entrance a plurality of flow deflectors, be looped around the urceolus of described carbonization kettle periphery, the dewatered sludge that described carbonization kettle transports for dewatered sludge mummification unit described in carbonization, described driving mechanism is used for driving the rotation of described carbonization kettle, thereby described urceolus is for holding heating medium to heat the dewatered sludge in carbonization kettle described in described carbonization kettle indirect heating.

In such scheme, described urceolus comprises independently heating chamber of multistage, and arrange along the axial direction due of described carbonization kettle described multistage heating chamber, and every section of heating chamber is provided with hot blast import and hot-blast outlet.

Compared with prior art, the technique effect that the present invention obtains is:

1, this sludge high temperature carbonization system can make full use of the rear heat forming of carbonizing gas burning that dewatered sludge produces in mummification and carbonization process, for sludge drying and carbonization process.This mud carbonization system is recycled heat energy, thereby reaches energy-conservation object.

2, this mud carbonization system carries out carbonization to dewatered sludge, thereby can reduce in a large number volume and the weight of mud, and the carbonated product particle odorless producing in carbonization process.Meanwhile, the waste gas that this mud carbonization system produces in treating processes and the discharge of waste water reach urban wastewater treatment firm sludge disposal-independent burning by the relevant regulations in shale standard.And mud is after carbonizing treatment, heavy metal ion is cured in carbide product, thereby becomes stable, and environment is safe from harm.And, in the carbonization process of dewatered sludge, heavy metal relative is stable, and the Leaching Heavy Metals of mud carbide reaches, and < < urban wastewater treatment firm sludge disposal-burning is stipulated with the emission limit of shale > > (CJ-T290-2008) separately.Further, the product after dewatered sludge carbonization has the characteristic similar with charcoal, can be used as soil improvement and afforestation etc.

3, this mud carbonization system can be realized 100 tons of above mass-producings processing of dewatered sludge day output.

4, the utilization of carbonization carbonizing gas that this mud carbonization system produces mud in mummification and carbonization process and the high temperature deodorization integration of waste gas are processed and are combined, when the carbonizing treatment for dewatered sludge provides energy, waste gas is carried out to high temperature deodorization processing, reduced this mud carbonization system energy consumption, and simplified the equipment configuration of this mud carbonization system, made the operation operation of system easier, reliable.

5, this mud carbonization system can be according to the finished product demand, can be to mud carbonizing treatment under 600 degrees Celsius to 800 degrees Celsius.

6, this mud carbonization system is used multistage heating chamber to heat carbonization kettle, can guarantee the hot environment of carbonization kettle and make the more uniform temperature in carbonization kettle, is conducive to the stable formation of carbide.

Accompanying drawing explanation

The structural representation of the sludge high temperature carbonization system that Fig. 1 provides for the embodiment of the present invention.

Fig. 2 is the structural representation of the outer heat revolution indirect sludge carbide furnace in Fig. 1.

In figure: 1-dewatered sludge storage warehouse, 2-dewatered sludge worm conveyor, 3-mud spiral pump, 4-dewatered sludge drying machine, 5-tornado dust collector, 6-dewatered sludge scraper conveyor, 7-dewatered sludge storage warehouse, 8-dewatered sludge worm conveyor, the outer heat revolution of 9-indirect sludge carbide furnace, 10-water-cooling spiral transfer roller, 11-carbide scraper conveyor, 12-carbide storage warehouse, 13-carbide worm conveyor, 14-carbonization process furnace, 15-supplements energy unit, 16-recirculation blower, 17-gas blower, 18-induced draft fan, 19-one-level heat exchanger, 20-two-stage heat exchanger, 21-carbonization kettle, 22-urceolus, 23-flight, 24-flow deflector, 25-heating chamber, the import of 26-hot blast, 27-hot-blast outlet, 28-thermal insulation layer, 29-drive-motor, 30-driving gear, 31-roller, 32-support roller, 33-the first temperature control component, 34-the second temperature control component, 35-sealing element, 36-sealing water-cooled element, the outlet of 37-carbonizing gas, the outlet of 38-carbide.

Embodiment

Below in conjunction with drawings and Examples, the invention will be further described, and certain following embodiment should not be construed as limitation of the present invention.

As depicted in figs. 1 and 2, a kind of sludge high temperature carbonization system that it provides for the embodiment of the present invention, the dewatered sludge that it comprises dewatered sludge feed unit, provide dewatered sludge feed unit carries out the dewatered sludge mummification unit of mummification, dewatered sludge carbonation unit, thermal cycling crosspoint and the carbonization process furnace 14 that the mud after mummification is carried out to carbonization.

Wherein, this dewatered sludge feed unit comprises dewatered sludge storage warehouse 1, dewatered sludge worm conveyor 2 and mud spiral pump 3.

This dewatered sludge mummification unit comprises dewatered sludge drying machine 4, tornado dust collector 5, dewatered sludge scraper conveyor 6 and dewatered sludge storage warehouse 7.In drying process, adopt cylinder convection current direct contact type drying machine to be dried mud.

This dewatered sludge carbonation unit comprises dewatered sludge worm conveyor 8, outer heat revolution indirect sludge carbide furnace 9 and carbide conveying and storing apparatus.In the present embodiment, this carbide conveying and storing apparatus comprises water-cooling spiral transfer roller 10, carbide scraper conveyor 11, carbide storage warehouse 12 and carbide worm conveyor 13.

This sludge high temperature carbonization system also comprises the supplementary energy unit 15 for supplementing the energy to this carbonization process furnace 14.

This thermal cycling crosspoint comprises recirculation blower 16, gas blower 17, induced draft fan 18, one-level heat exchanger 19 and two-stage heat exchanger 20.

Utilize the carbonization technique flow process of this sludge high temperature carbonization system as follows:

1) dewatered sludge is stored in dewatered sludge storage warehouse 1, through dewatered sludge worm conveyor 2 and mud spiral pump 3, is transported in dewatered sludge drying machine 4;

2) carbonization process furnace 14 supply heated air directly contact with the dewatered sludge in dewatered sludge drying machine 4, flue gas is taken away the most of moisture in dewatered sludge, make the water ratio of dewatered sludge drop to 30% left and right by 80%, the heated air of discharging from dewatered sludge drying machine 4, after tornado dust collector 5 dedustings, is resent to carbonization process furnace 14 burning deodorizations after being sent to 19 heat exchange of one-level heat exchanger by recirculation blower 16;

3) the dried dewatered sludge of dewatered sludge drying machine 4 is transported in dewatered sludge storage warehouse 7 and is stored through dewatered sludge scraper conveyor 6, dewatered sludge worm conveyor 8 is controlled outside heat revolution indirect sludge carbide furnace 9 from dewatered sludge storage warehouse 7 by interlock and is supplied with dewatered sludges, carbonization process furnace 14 is supplied with heated air to outer heat revolution indirect sludge carbide furnace 9, dewatered sludge outside in heat revolution indirect sludge carbide furnace 9 through the high temperature of 600 ~ 800 ℃, anaerobic treatment, separate out most moisture and the flammable minute stable carbonized product of the final formation of component, carbonized product is cooling and be transported in carbide storage warehouse 12 and store through water-cooling spiral transfer roller 10 and carbide scraper conveyor 11 respectively, and through 13 outputs of carbide worm conveyor, finally pack and transportation.

In the present embodiment, this outer heat revolution indirect sludge carbide furnace 9 comprise rotatable carbonization kettle 21, driving mechanism, be arranged on carbonization kettle 21 inwalls a plurality of flights 23, be arranged on carbonization kettle 21 mud entrances a plurality of flow deflectors 24, be looped around urceolus 22 and the temperature control unit of carbonization kettle 21 peripheries.The dewatered sludge that carbonization kettle 21 transports for carbonization dewatered sludge mummification unit.Driving mechanism is used for driving 21 rotations of carbonization kettle.Thereby urceolus 22 is for holding heating medium with the dewatered sludge in heating carbonization kettle 21 indirect heating carbonization kettlies 21.

In the present embodiment, urceolus 22 comprises independently heating chamber 25 of multistage.Arrange along the axial direction due of carbonization kettle 21 multistage heating chamber 25, and it provides heat during for carbonization mud.Every section of heating chamber 25 is provided with hot blast import 26 and hot-blast outlet 27.The outside of every section of heating chamber 25 is provided with thermal insulation layer 28, for reducing the loss of these multistage heating chamber 25 energy.

In the present embodiment, driving mechanism comprises drive-motor 29 and driving gear 30.Drive-motor 29 drives driving gear 30 to make 21 rotations of carbonization kettle.This drive-motor 29 is adjustable speed motor.For guaranteeing that the stability of carbonization kettle 21 rotations exists, at the opposite side of drive-motor 29, be provided with roller 31 and support roller 32.

This temperature control unit comprises at least one first temperature control component 33 and a plurality of the second temperature control component 34.At least one first temperature control component 33 is the temperature in carbonization mud process for detection of carbonization kettle 21, and the rotating speed that regulates driving mechanism to drive carbonization kettle 21 to rotate according to described temperature, to regulate the carbonizing treatment time.Each second temperature control component 33 is for detection of the temperature of every section of heating chamber 25, and according to described temperature, regulates air output and the inlet temperature of hot blast import 26.

This dewatered sludge carbonation unit also comprises sealing element 35 and the sealing water-cooled element 36 for sealing element 35 is lowered the temperature.Sealing element 35 is arranged on two ends of multistage heating chamber 25, for reducing the spillage of the high-temperature gas that dewatered sludge produces at carbonization process, thereby reduces the loss of energy.Sealing water-cooled element 36 can reduce the temperature of sealing element 35, and guarantees the superperformance of sealing element 35.

The carbonization process of 9 pairs of dewatered sludges of this outer heat revolution indirect sludge carbide furnace is specially: dewatered sludge is delivered to rotating carbonization kettle 21.Under carbonization kettle 21 actings in conjunction of carbonization kettle 21 internal diversion plates 24 and the inner flight 23 of carbonization kettle and rotation, dewatered sludge advances to the afterbody of carbonization kettle 21.In progradation, heat of high temperature by the 21 outer wall transmission of carbonization kettle constantly heats, in inner high temperature, the anaerobic environment that forms 600 ~ 800 degrees Celsius of carbonization kettle 21, dewatered sludge is separated out most moisture, the stable carbonized product of the final formation of the flammable component of grading in this process.The components such as flammable minute of separating out in carbonization kettle 21 inside of dewatered sludge, moisture export 37 by carbonizing gas and are expelled to heating carbide furnace 14 to carry out the processing such as deodorization burning.The carbide forming in carbonization kettle 21 is through carbide outlet 38 outputs.Be understandable that, the present invention can select different temperature ranges to carry out carbonization for the mud of heterogeneity in the temperature range of 600 ~ 800 ℃.

In the present embodiment, the heated air of carbonization process furnace 14 output by each independently 25 pairs of rotating carbonization kettlies 21 of heating chamber heat, it does not directly contact with dewatered sludge and mud carbide, thereby has guaranteed the harmless odorless of emission gases.Gas after having heated is discharged from outer heat revolution indirect sludge carbide furnace 9, and after one-level heat exchanger 19 and two-stage heat exchanger 20 twice heat exchange, temperature is down to 200 ℃ of following rear discharges.Simultaneously, the air that gas blower 17 blasts fully heats by two-stage heat exchanger 20, then enters carbonization process furnace 14, thinks the fresh air that system is supplementary required and makes full use of tail gas heat quantity, thereby take full advantage of the waste heat of this mud carbonization system, reached energy-conservation object.Further, when the energy deficiency of this carbonization process furnace 14, by this supplementary energy unit 15, carry out the energy and supplement.

The carbonizing gas that in outer heat revolution indirect sludge carbide furnace 9, carbonization produces, under the guiding function of induced draft fan 18, is sucked into carbonization process furnace 14 deodorization of burning by flue.Therefore utilize the incendivity part of volatile matter in mud carbonization process as the energy of this carbonization process furnace 14, thereby in deodorizing, remove the materials such as dioxin that environment had to serious harm, thereby reach the object of environmental protection.

It should be noted that, those of ordinary skill in the art should be appreciated that and can modify or be equal to replacement technical scheme of the present invention, and do not depart from aim and the scope of technical solution of the present invention, and it all should be encompassed in the middle of claim scope of the present invention.

Claims (7)

1. sludge high temperature carbonization system, it is characterized in that, it comprises dewatered sludge feed unit, the dewatered sludge that described dewatered sludge feed unit is provided carries out the dewatered sludge mummification unit of mummification, mud after mummification is carried out to the dewatered sludge carbonation unit of carbonization, thermal cycling crosspoint, and carbonization process furnace, described dewatered sludge mummification unit comprises dewatered sludge drying machine, described dewatered sludge carbonation unit comprises mud carbide furnace, described carbonization process furnace is used for supplying with heated air to described dewatered sludge drying machine with sludge-drying and for supplying with heated air to described mud carbide furnace so that mud heats carbonization, described thermal cycling crosspoint is sent to the deodorization of burning of described carbonization process furnace for the heated air that described dewatered sludge mummification unit is discharged after heat exchange, described carbonization process furnace is also for the carbonizing gas that carbonization produces to the described mud carbide furnace deodorization of burning, described dewatered sludge mummification unit comprises and also comprises tornado dust collector, dewatered sludge scraper conveyor, and dewatered sludge storage warehouse, through the dried dewatered sludge of described dewatered sludge drying machine, via described dewatered sludge scraper conveyor, be transported in described dewatered sludge storage warehouse and store, the heated air that described dewatered sludge drying machine is discharged enters described thermal cycling crosspoint after tornado dust collector, described mud carbide furnace comprises rotatable carbonization kettle, driving mechanism, be arranged on a plurality of flights of described carbonization inner wall of kettle, be arranged on a plurality of flow deflectors of described carbonization kettle mud entrance, be looped around the urceolus of described carbonization kettle periphery, the dewatered sludge that described carbonization kettle transports for dewatered sludge mummification unit described in carbonization, described driving mechanism is used for driving described carbonization kettle rotation, thereby described urceolus is for holding heating medium to heat the dewatered sludge in carbonization kettle described in described carbonization kettle indirect heating.
2. sludge high temperature carbonization system as claimed in claim 1, it is characterized in that, described dewatered sludge carbonation unit also comprises dewatered sludge worm conveyor and carbide conveying and storing apparatus, described dewatered sludge worm conveyor is for being delivered to described mud carbide furnace by the dewatered sludge of described dewatered sludge mummification unit output, and described carbide conveying and storing apparatus is carried and stores for the carbide that mud carbide furnace is formed.
3. sludge high temperature carbonization system as claimed in claim 1, it is characterized in that, described thermal cycling crosspoint also discharges after heat exchange for the heated air that described mud carbide furnace is discharged, described thermal cycling crosspoint comprises recirculation blower, induced draft fan, gas blower, one-level heat exchanger, and two-stage heat exchanger, the heated air that discharge described dewatered sludge mummification unit is sent to and is resent to the deodorization of burning of described carbonization process furnace after the heat exchange of described one-level heat exchanger by described recirculation blower, the heated air that described mud carbide furnace is discharged is after described one-level heat exchanger and two-stage heat exchanger heat exchange, emptying under the guiding of described induced draft fan again, described gas blower enters described carbonization process furnace after being used for blasting air and air fully being heated by described two-stage heat exchanger.
4. sludge high temperature carbonization system as claimed in claim 1, is characterized in that, described urceolus comprises independently heating chamber of multistage, and arrange along the axial direction due of described carbonization kettle described multistage heating chamber, and every section of heating chamber is provided with hot blast import and hot-blast outlet.
5. sludge high temperature carbonization system as claimed in claim 4, it is characterized in that, described mud carbide furnace also includes temperature control unit, described temperature control unit comprises at least one first temperature control component and a plurality of the second temperature control component, described a plurality of the first temperature control component is the temperature in carbonization mud process for detection of described carbonization kettle, and regulate described driving mechanism to drive the rotating speed of described carbonization kettle rotation according to described temperature, described a plurality of the second temperature control component is for detection of the temperature of every section of heating chamber, and according to described temperature, regulate air output and the inlet temperature of described hot blast import.
6. sludge high temperature carbonization technique, is characterized in that, it comprises the following steps:
1) dewatered sludge is delivered in dewatered sludge drying machine;
2) carbonization process furnace supply heated air directly contacts with the dewatered sludge in dewatered sludge drying machine, moisture percentage in sewage sludge is dropped to 30%, the heated air of discharging from dewatered sludge drying machine, after cyclone dust removal, is undertaken entering carbonization process furnace burning deodorization after heat exchange by thermal cycling crosspoint;
3) the dried dewatered sludge of dewatered sludge drying machine is delivered in mud carbide furnace, carbonization process furnace is supplied with heated air to mud carbide furnace, dewatered sludge in mud carbide furnace through the high temperature of 600 ~ 800 ℃, anaerobic treatment, separate out most moisture and the flammable minute stable carbonized product of the final formation of component, the carbonizing gas that in mud carbide furnace, carbonization produces exports the deodorization of burning of carbonization process furnace to, described mud carbide furnace comprises rotatable carbonization kettle, driving mechanism, be arranged on a plurality of flights of described carbonization inner wall of kettle, be arranged on a plurality of flow deflectors of described carbonization kettle mud entrance, be looped around the urceolus of described carbonization kettle periphery, the dewatered sludge that described carbonization kettle transports for dewatered sludge mummification unit described in carbonization, described driving mechanism is used for driving described carbonization kettle rotation, thereby described urceolus is for holding heating medium to heat the dewatered sludge in carbonization kettle described in described carbonization kettle indirect heating.
7. sludge high temperature carbonization technique as claimed in claim 6, is characterized in that, described urceolus comprises independently heating chamber of multistage, and arrange along the axial direction due of described carbonization kettle described multistage heating chamber, and every section of heating chamber is provided with hot blast import and hot-blast outlet.
CN201310112617.8A 2013-04-02 2013-04-02 High temperature carbonization system of sludge and carbonization process CN103145307B (en)

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