CN102531324B - Wet sludge drying and incinerating treatment device - Google Patents
Wet sludge drying and incinerating treatment device Download PDFInfo
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- CN102531324B CN102531324B CN 201210011814 CN201210011814A CN102531324B CN 102531324 B CN102531324 B CN 102531324B CN 201210011814 CN201210011814 CN 201210011814 CN 201210011814 A CN201210011814 A CN 201210011814A CN 102531324 B CN102531324 B CN 102531324B
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Abstract
The invention relates to a wet sludge incinerating treatment device and relates to the waste treatment technology. The treatment device comprises a circulating fluidized bed hearth, a separator, a material returning device, a tail flue, a duster, a chimney and a fluidized bed type sludge drier, wherein an exhaust outlet and a wet sludge inlet are arranged at the top of the sludge drier, an air distributing device and a dry sludge outlet are arranged at the bottom of the sludge drier, and a heat release coil filled with a heat transfer medium is arranged inside the sludge drier; an air preheater and a heat exchanger are arranged in the tail flue; the heat exchanger is communicated with the heat release coil in the sludge drier; a secondary air port, a material returning port and a dry sludge inlet are arranged at the lower part of the sidewall of the circulating fluidized bed hearth; and the dry sludge inlet is communicated with the dry sludge outlet of the sludge drier, and the secondary air port is communicated with the exhaust outlet of the sludge drier. By adopting the device provided by the invention, the heat from sludge incineration is recovered as much as possible by a process as simple as possible, the wet sludge is incinerated with low energy consumption, and the gas is simultaneously subjected to deodorization and harmless treatment.
Description
The application is the application number (denomination of invention: dividing an application a kind of wet sludge drying, incinerating and treating device) that is 2008100224996.9
Technical field
The present invention relates to a kind of waste treatment apparatus, particularly relate to a kind of incinerating and treating device of mud.
Background technology
Mud is the solid residue after the sewage disposal, and sludge quantity accounts for about 1 ‰ (in moisture content 80%) of sewage load.Along with the continuous construction of sewage treatment plant, the industry of China and sanitary sewage disposal amount increase sharply, and will produce more mud.The composition of mud is very complicated, except containing a large amount of moisture, also contains organic matter, various trace elements, pathogenic microorganism and the compositions such as parasitic ovum, heavy metal of a large amount of organic matters, difficult degradation.How that output is huge, the sewage sludge harmlessness of complicated component, resource have become one of problem that whole world environment circle attractes attention.
Method for sludge treatment take burning as core can reach minimizing, stabilisation and innoxious target.The more sludge incineration method of foreign applications is the method for burning after the first mummification at present, first mud is carried out burning again after the preliminary treatment such as mummification, the mummification of mud is finished by the essentially independent system of two covers with burning, complex process, investment of equipment is high, and the drying process of mud also needs lot of energy (heat energy that provides of electric energy or auxiliary fuel burning is provided), thereby operating cost is high, is difficult to adapt to the national conditions of China.
Simultaneously, in the prior art, the weary gas that sludge drying produces carries out harmless treatment by special gas handling system usually, and this cover system generally comprises dedusting, condensation, carbonated drink to be separated, and the foul smell that produces when avoiding sludge drying leaks contaminated environment; But not only itself is comparatively complicated for this cover system, also produces simultaneously mud fine powder and sewage, has further increased the complexity of sludge incinerating system.
Except the sludge incineration processing method that burns after the first mummification, also have in the prior art wet mud is directly added the method that burner hearth burns, wet mud and auxiliary fuel multifuel combustion produce heat, for moisture, maintenance fire box temperature, the required air of preheated burning of the wet mud of heating, the wet mud of evaporation, can discharge incinerator with flue gas by some after-heat in addition.This part heat adopted wall-cooling surface to be taken away by water usually before deduster, in order to make flue-gas temperature be reduced to the scope that deduster can bear.If but there is not hot user near the sludge incineration plant area, the hot water that wall-cooling surface produces or steam also need to cause heat waste by the cooling system cooling.
Summary of the invention
The objective of the invention is to propose a kind of wet mud burning treatment apparatus, with simple as far as possible technique, reclaim simultaneously the heat of sludge incineration as far as possible, with the wet mud of low energy consumption burning disposal, the eliminating malodours from gases that produces in the processing procedure simultaneously is innoxious.
For achieving the above object, technical solution of the present invention is as follows:
A kind of wet mud burning treatment apparatus comprises recirculating fluidized bed burner hearth, separator, material returning device, back-end ductwork, deduster, chimney and auxiliary system; It also comprises fluidized bed type sludge drying device, and sludge drying device top is provided with weary gas outlet and the mud entrance that wets, and the bottom is provided with air-distribution device, dewatered sludge outlet, and inside is provided with the heat release coil pipe that is filled with heat transferring medium;
Be provided with air preheater in its back-end ductwork and be filled with the heat exchanger of heat transferring medium, heat exchanger is connected with heat release coil pipe in the sludge drying device;
Its burner hearth sidewall bottom is provided with overfiren air port, returning charge mouth and dewatered sludge entrance; The dewatered sludge entrance is connected with the dewatered sludge outlet of sludge drying device, and overfiren air port is connected with the weary gas outlet of sludge drying device.
Described wet mud burning treatment apparatus, its described recirculating fluidized bed burner hearth are adiabatic, are provided with waste heat boiler in the described back-end ductwork.
Described wet mud burning treatment apparatus is provided with wall-cooling surface in its described recirculating fluidized bed burner hearth.
Described wet mud burning treatment apparatus, its described sludge drying device top also is provided with the circulating ash entrance that is connected with material returning device.
Described wet mud burning treatment apparatus, its described recirculating fluidized bed burner hearth lower sidewall also is provided with the auxiliary fuel entrance.
Described wet mud burning treatment apparatus, be provided with two air preheaters in its described back-end ductwork, the air outlet slit of an air preheater links to each other with the burner hearth bottom bellows, and the air outlet slit of another air preheater links to each other with the air-distribution device of sludge drying device bottom.
Described wet mud burning treatment apparatus, the dewatered sludge entrance of its described burner hearth is connected by screw(-type) feeder with the outlet of the dewatered sludge of sludge drying device.
Described wet mud burning treatment apparatus, the dewatered sludge entrance of its described burner hearth export in the pipeline that is connected with the dewatered sludge of sludge drying device and are provided with blocking valve.
The present invention is applicable to the burning disposal of wet mud and other high-moisture percentage fuel or discarded object.The present invention enters the burner hearth high temperature incineration with the weary pneumatic transmission that contains air, steam and sludge odor and fine powder that produces in the mud drying process, in realizing the sludge incineration process deodorizing of gas innoxious in, also realize the burner hearth staged air distribution, suppress the generation of NOx; Recycle simultaneously the wet mud of heat mummification that the high-temperature flue gas that contains a large amount of sludge water steams takes back-end ductwork to, can reduce the consumption of auxiliary fuel, improve the economy of system, can significantly reduce operating cost; System flow is simple and clear, and device is simple, and not only investment of equipment is cheap, and operation stability and reliability height.
Description of drawings
Fig. 1 is embodiment 1 and embodiment 2 structural representations of a kind of wet sludge drying, incinerating and treating device of the present invention.
Fig. 2 is embodiment 3 structural representations of a kind of wet sludge drying, incinerating and treating device of the present invention.
Fig. 3 is embodiment 4 structural representations of a kind of wet sludge drying, incinerating and treating device of the present invention.
Fig. 4 is embodiment 5 structural representations of a kind of wet sludge drying, incinerating and treating device of the present invention.
The drawing reference numeral explanation:
The specific embodiment
The operation principle of wet mud burning treatment apparatus of the present invention is:
For simplifying technique, also to realize heat recovery simultaneously, the present invention passes into burner hearth with the weary gas of sludge drying device, both saved complicated gas handling system, utilize simultaneously the larger principle of steam specific heat in the weary gas, flue gas takes amount of heat to back-end ductwork from burner hearth, thereby can reclaim more heats from the afterbody high-temperature flue gas, being used for wet sludge anhydration is dewatered sludge, burns again.
Concrete principle is: in the direct burning process of existing wet mud, wet mud heating, mummification were carried out in the incinerator burner hearth with the burning process while, thereby the amount of heat that flue gas is brought into back-end ductwork is difficult to utilize fully; To wet heating, mummification and the burning of mud of the present invention decomposes in sludge drying device and incinerator burner hearth and carries out respectively, so that the heat that flue gas is brought in the back-end ductwork is utilized as the thermal source of sludge drying device.The heat of sludge incineration generation is recycled utilization in internal system like this, can reduce the consumption of auxiliary fuel, makes wet mud can realize that the moisture content lower limit of self-sustaining burning (namely not needing auxiliary fuel) significantly is improved.
Wet mud is heated in the sludge drying device, the moisture evaporation, the sludge drying device is fluidized bed type simultaneously, passed into large quantity of air from its bottom, therefore the weary gas of sludge drying device is mainly air and steam, also contains simultaneously the foul smell that volatile component forms in the mud and be fluidized the mud fine powder that gas is carried secretly in drying process.The weary gas of sludge drying device passes into the incinerator lower furnace portion as the burner hearth Secondary Air, and triple role is arranged:
The first, the foul smell in the weary gas and mud fine powder are directly carried out the high temperature incineration processing, saved special weary gas processing system, simplified sludge incinerating system, do not produce the secondary pollutions such as sewage; And because the weary gas of sludge drying device of the present invention is not only the aerogenesis of mud drying process, also comprising a large amount of drying device fluidizing gas, pressure head is higher, thereby has possessed the condition that passes into the lower furnace portion higher-pressure region; Weary gas passes into lower furnace portion, makes the time of staying of weary gas in burner hearth longer, is enough to guarantee that the foul smell in the weary gas at high temperature decomposes, thereby realizes that deodorizing is innoxious;
Second, steam specific heat in the weary gas is much larger than air, the high-temperature flue gas that contains a large amount of steam that produces after burning is brought amount of heat into back-end ductwork from burner hearth, heat exchanger in the back-end ductwork thereby can absorb more heats and offer the sludge drying device, be enough to the wet sludge anhydration that remains to be burned be the dewatered sludge of moisture content 5～25%, avoided the mud plastic stage of moisture content between 35～60%, be in the similar glue of sludge stream dynamic characteristic of plastic stage, gluey, thickness, difficulty of transportation;
The 3rd, contain a large amount of air as sludge drying device fluidizing gas in the weary gas, pass into lower furnace portion as the burner hearth Secondary Air, can realize stove internal classification air distribution, not only can make sludge incineration more abundant, and because the mud nitrogen content is higher, the sludge classification air distribution can suppress the generation of NOx, make incinerator NOx discharging directly up to standard, flue-gas denitrification equipment need be set.
Owing to adopting circulating fluidized bed incinerator, fire box temperature remains on 850～900 ℃ simultaneously, so directly adds desulfurizing agent in the burner hearth, typically such as agstone, can realize desulfuration in furnace, reduces incinerator SO
2Concentration of emission.In addition, also column for smoke purification can be set before deduster, increase in flue gas and the stove the not time of contact of the CaO of complete reaction, utilize simultaneously the in a large number humidification activation effect of steam in the flue gas, make desulphurization reaction carry out more fully, further reduce SO
2Concentration of emission.
The fluidizing gas of sludge drying device can be the cold air without preheating, is conducive to guarantee that the operating temperature in the sludge drying device is not too high; Also can be the hot-air through the air preheater preheating, be conducive to further reclaim the waste heat of sludge incineration.This air preheater is arranged at a conventional wind preheater downstream, because preheat temperature is lower than the wind preheat temperature one time.
When, calorific value higher when moisture percentage in sewage sludge is low, needs to add auxiliary fuel and remain on 850～900 ℃ to help keeping fire box temperature, coal, oil, natural gas all are optional auxiliary fuels; Lower when moisture percentage in sewage sludge, when calorific value is higher, then do not need to add auxiliary fuel.Through measuring and calculating, adopt device of the present invention can make moisture content up to 76%, the mud of butt calorific value 3000kcal/kg do not add auxiliary fuel and gets final product self-sustaining burning.
For adopting the wet mud that method of the present invention can not self-sustaining burning, be generally moisture content and be higher than 76%, or the butt calorific value is lower than the wet mud of 3000kcal/kg, need to add auxiliary fuel; For reclaiming as much as possible the heat of mud and auxiliary fuel burning, this moment, the moisture content of the dewatered sludge that the sludge drying device is discharged should be 5～15%.
For adopt method of the present invention can self-sustaining burning and heat also have remaining wet mud, be generally moisture content and be lower than 76%, or the butt calorific value is higher than the wet mud of 3000kcal/kg, if the moisture content of the dewatered sludge that the sludge drying device is discharged reaches 5～15%, fire box temperature will be above 850～900 ℃, the carrying out that is unfavorable for desulphurization reaction, this moment, burner hearth should arrange heating surface with the control fire box temperature; A circulating ash part that perhaps separator is separated is directly sent burner hearth back to, and another part is sent into the sludge drying device, and also the thermal source as sludge drying utilizes.For this type of mud, the moisture control of the dewatered sludge that the sludge drying device can also be discharged is 15～25%, fire box temperature just can be controlled in 850～900 ℃ like this, flue gas takes the heat of afterbody to except being absorbed the part by heat exchanger and air preheater, also have residue, waste heat boiler can be set be used.
The present invention is described in detail for five embodiment for the below.
Referring to Fig. 1:
Adopt circulating fluidized bed incinerator to burn that moisture content is 76%, the wet mud of butt calorific value 3000kcal/kg, wet mud C is after 9 mummification of sludge drying device, in burner hearth 1, burn, behind the heat exchanger 5 and air preheater 6 coolings, deduster 7 dedustings of the high-temperature flue gas that burn to produce in back-end ductwork 4, through chimney 8 dischargings.
Circulating fluidized bed incinerator comprises recirculating fluidized bed burner hearth 1, separator 2, material returning device 3, back-end ductwork 4, deduster 7, chimney 8 and auxiliary system, also comprises fluidized bed type sludge drying device 9.
The dewatered sludge entrance of burner hearth 1 links to each other by screw(-type) feeder with the outlet of the dewatered sludge of sludge drying device 9, and the overfiren air port of burner hearth 1 links to each other by pipeline with the weary gas outlet of sludge drying device 9.
Be provided with air preheater 6 and the heat exchanger 5 that is filled with conduction oil in the back-end ductwork 4.Heat release coil pipe 10 in heat exchanger 5 and the sludge drying device 9 links to each other by connecting pipe.Air preheater 6 is divided into two up and down, and the air outlet slit of the air preheater of top links to each other with burner hearth 1 bottom bellows, and the air outlet slit of the air preheater of below links to each other with the bellows of sludge drying device 9 bottoms.
The wet mud C that breaks up through dispersing device adds from the wet mud entrance of sludge drying device 9, by air A fluidisation and heating, absorb simultaneously the heat that heat release coil pipe 10 discharges, by the dewatered sludge F of mummification to moisture content 5%, enter burner hearth 1 through screw(-type) feeder from the dewatered sludge entrance of burner hearth 1 sidewall from the outlet of the dewatered sludge of sludge drying device 9 bottoms, 850 ℃ of lower burnings.The flue gas that produces enters after separator 2 is isolated circulating ash in the back-end ductwork 4, and circulating ash is sent burner hearth 1 through material returning device 3 back to from the returning charge mouth of burner hearth 1 sidewall.The fluidizing gas A of sludge drying device 9 is that on the lower air preheater 6 is preheating to 100 ℃ hot-air through the position.
Falling heat-transfer oil in the heat release coil pipe 10 in heat exchanger 5 and the sludge drying device 9.Conduction oil absorbs heat in the high-temperature flue gas from back-end ductwork 4 in heat exchanger 5, and heat release in the heat release coil pipe 10 in sludge drying device 9 makes sludge drying device 9 keep 80 ℃ operating temperature.
Desulfurization is sent into burner hearth 1 with agstone with weary gas D.
When burning moisture content and be lower than this example or butt calorific value and be higher than the wet mud of this example or other high-moisture percentage fuel, discarded object, present embodiment is also applicable.
Referring to Fig. 1:
Adopt circulating fluidized bed incinerator to burn that moisture content is 60%, the wet mud of butt calorific value 3000kcal/kg, wet mud C is after 9 mummification of sludge drying device, in burner hearth 1, burn, behind the heat exchanger 5 and air preheater 6 coolings, deduster 7 dedustings of the high-temperature flue gas that burn to produce in back-end ductwork 4, through chimney 8 dischargings.
Circulating fluidized bed incinerator comprises recirculating fluidized bed burner hearth 1, separator 2, material returning device 3, back-end ductwork 4, deduster 7, chimney 8 and auxiliary system, also comprises fluidized bed type sludge drying device 9.
Be provided with wall-cooling surface in the burner hearth 1, its sidewall is fin panel casing, and lower sidewall is provided with overfiren air port, returning charge mouth, dewatered sludge entrance.
The dewatered sludge entrance of burner hearth 1 links to each other by screw(-type) feeder with the outlet of the dewatered sludge of sludge drying device 9, and the overfiren air port of burner hearth 1 links to each other by pipeline with the weary gas outlet of sludge drying device 9.
Be provided with air preheater 6 and the heat exchanger 5 that is filled with conduction oil in the back-end ductwork 4.Heat release coil pipe 10 in heat exchanger 5 and the sludge drying device 9 links to each other by connecting pipe.Air preheater 6 is divided into two up and down, and the air outlet slit of the air preheater of top links to each other with burner hearth 1 bottom bellows, and the air outlet slit of the air preheater of below links to each other with the bellows of sludge drying device 9 bottoms.
The wet mud C that breaks up through dispersing device adds from the wet mud entrance of sludge drying device 9, by air A fluidisation, absorb simultaneously the heat that heat release coil pipe 10 discharges, by the dewatered sludge F of mummification to moisture content 10%, enter burner hearth 1 through screw(-type) feeder from the dewatered sludge entrance of burner hearth 1 sidewall from the outlet of the dewatered sludge of sludge drying device 9 bottoms, 900 ℃ of lower burnings.The flue gas that produces enters after separator 2 is isolated circulating ash in the back-end ductwork 4, and circulating ash is sent burner hearth 1 through material returning device 3 back to from the returning charge mouth of burner hearth 1 sidewall.The fluidizing gas A of sludge drying device 9 is that on the lower the air preheater 6 of below is preheating to 150 ℃ hot-air through the position.
Falling heat-transfer oil in the heat release coil pipe 10 in heat exchanger 5 and the sludge drying device 9.Conduction oil absorbs heat in the high-temperature flue gas from back-end ductwork 4 in heat exchanger 5, and heat release in the heat release coil pipe 10 in sludge drying device 9 makes sludge drying device 9 keep 85 ℃ operating temperature.
Desulfurization is sent into burner hearth 1 with agstone with weary gas D.
Referring to Fig. 2:
Adopt circulating fluidized bed incinerator to burn that moisture content is 76%, the wet mud of butt calorific value 3500kcal/kg, wet mud C is after 9 mummification of sludge drying device, in burner hearth 1, burn, after heat exchanger 5, air preheater 6 and waste heat boiler 11 coolings of the high-temperature flue gas that burn to produce in back-end ductwork 4, deduster 7 dedustings, through chimney 8 dischargings.
Circulating fluidized bed incinerator comprises recirculating fluidized bed burner hearth 1, separator 2, material returning device 3, back-end ductwork 4, deduster 7, chimney 8 and auxiliary system, also comprises fluidized bed type sludge drying device 9.
The dewatered sludge entrance of burner hearth 1 links to each other by screw(-type) feeder with the outlet of the dewatered sludge of sludge drying device 9, and the overfiren air port of burner hearth 1 links to each other by pipeline with the weary gas outlet of sludge drying device 9.
Be provided with air preheater 6 and the heat exchanger 5 that is full of steam in the back-end ductwork 4, and waste heat boiler 11.Heat release coil pipe 10 in heat exchanger 5 and the sludge drying device 9 links to each other by connecting pipe.Air preheater 6 is divided into two up and down, and the air outlet slit of the air preheater of top links to each other with burner hearth 1 bottom bellows, and the air outlet slit of the air preheater of below links to each other with the bellows of sludge drying device 9 bottoms.
The wet mud C that breaks up through dispersing device adds from the wet mud entrance of sludge drying device 9, by air A fluidisation and heating, absorb simultaneously the heat that heat release coil pipe 10 discharges, by the dewatered sludge F of mummification to moisture content 25%, enter burner hearth 1 through screw(-type) feeder from the dewatered sludge entrance of burner hearth 1 sidewall from the outlet of the dewatered sludge of sludge drying device 9 bottoms, 860 ℃ of lower burnings.The flue gas that produces enters after separator 2 is isolated circulating ash in the back-end ductwork 4, and circulating ash is sent burner hearth 1 through material returning device 3 back to from the returning charge mouth of burner hearth 1 sidewall.The fluidizing gas A of sludge drying device 9 is the cold airs without preheating.
Heat-exchange working medium in heat exchanger 5 and the heat release coil pipe 10 is water/steam.Saturation water absorbs heat in the high-temperature flue gas from back-end ductwork 4 in heat exchanger 5 and is evaporated to steam, and heat release in the heat release coil pipe 10 of steam in sludge drying device 9 is re-condensed into saturation water, makes simultaneously sludge drying device 9 keep 80 ℃ operating temperature.
Desulfurization is sent into burner hearth 1 with agstone with weary gas D.
Referring to Fig. 3:
Adopt circulating fluidized bed incinerator to burn that moisture content is 80%, the wet mud of butt calorific value 3000kcal/kg, wet mud C is after 9 mummification of sludge drying device, in burner hearth 1 with auxiliary fuel G multifuel combustion, behind the heat exchanger 5 and air preheater 6 coolings, deduster 7 dedustings of the high-temperature flue gas that produces in back-end ductwork 4, through chimney 8 dischargings.
Circulating fluidized bed incinerator comprises recirculating fluidized bed burner hearth 1, separator 2, material returning device 3, back-end ductwork 4, deduster 7, chimney 8 and auxiliary system, also comprises fluidized bed type sludge drying device 9.
The dewatered sludge entrance of burner hearth 1 links to each other by the pipeline with blocking valve with the outlet of the dewatered sludge of sludge drying device 9, and the overfiren air port of burner hearth 1 links to each other by pipeline with the weary gas outlet of sludge drying device 9.
Be provided with an air preheater 6 and a heat exchanger 5 that is filled with steam in the back-end ductwork 4.Heat release coil pipe 10 in heat exchanger 5 and the sludge drying device 9 links to each other by connecting pipe.Air preheater 6 air outlet slits link to each other with burner hearth 1 bottom bellows.
The wet mud C that breaks up through dispersing device adds from the wet mud entrance of sludge drying device 9, the fluidizing gas A fluidisation that is passed into through wind-distributing pipe, absorb simultaneously the heat that heat release coil pipe 10 discharges, be 15% dewatered sludge F by mummification to moisture content, dewatered sludge entrance from the pipeline of the dewatered sludge of sludge drying device 9 bottoms outlet band blocking valve from burner hearth 1 sidewall enters burner hearth 1,850 ℃ of lower burnings.The flue gas that produces enters after separator 2 is isolated circulating ash in the back-end ductwork 4, and circulating ash is sent burner hearth 1 through material returning device 3 back to from the returning charge mouth of burner hearth 1 sidewall.Fluidizing gas A is the cold air without preheating.
In burner hearth, add auxiliary fuel G---coal from the auxiliary fuel entrance of burner hearth 1 sidewall, be used for making fire box temperature remain on 850 ℃.
Heat-exchange working medium in heat exchanger 5 and the heat release coil pipe 10 is water/steam.Saturation water absorbs heat in the high-temperature flue gas from back-end ductwork 4 in heat exchanger 5 and is evaporated to steam, and heat release in the heat release coil pipe 10 of steam in sludge drying device 9 is re-condensed into saturation water, makes simultaneously sludge drying device 9 keep 95 ℃ operating temperature.
Desulfurization adds from material returning device 3 with agstone, sends into burner hearth 1 with circulating ash.
When burning other moisture content and be higher than embodiment 1 or butt calorific value and be lower than the wet mud of embodiment 1 or other high-moisture percentage fuel, discarded object, present embodiment is also applicable.
Embodiment 5
Referring to Fig. 4:
Adopt circulating fluidized bed incinerator to burn that moisture content is 60%, the wet mud of butt calorific value 3000kcal/kg, wet mud C is after 9 mummification of sludge drying device, in burner hearth 1, burn, behind the heat exchanger 5 and air preheater 6 coolings, deduster 7 dedustings of the high-temperature flue gas that burn to produce in back-end ductwork 4, through chimney 8 dischargings.
Circulating fluidized bed incinerator comprises recirculating fluidized bed burner hearth 1, separator 2, material returning device 3, back-end ductwork 4, deduster 7, chimney 8 and auxiliary system, also comprises fluidized bed type sludge drying device 9.
The dewatered sludge entrance of burner hearth 1 links to each other by screw(-type) feeder with the outlet of the dewatered sludge of sludge drying device 9, and the overfiren air port of burner hearth 1 links to each other by pipeline with the weary gas outlet of sludge drying device 9.
Be provided with air preheater 6 and the heat exchanger 5 that is filled with conduction oil in the back-end ductwork 4.Heat release coil pipe 10 in heat exchanger 5 and the sludge drying device 9 links to each other by connecting pipe.Air preheater 6 is divided into two up and down, and the air outlet slit of the air preheater of top links to each other with burner hearth 1 bottom bellows, and the air outlet slit of the air preheater of below links to each other with the bellows of sludge drying device 9 bottoms.
The wet mud C that breaks up through dispersing device adds from the wet mud entrance of sludge drying device 9, by air A fluidisation, absorb simultaneously the heat of heat release coil pipe 10 releases and the heat that high-temp circulating ash discharges, by the dewatered sludge F of mummification to moisture content 10%, enter burner hearth 1 through screw(-type) feeder from the dewatered sludge entrance of burner hearth 1 sidewall from the outlet of the dewatered sludge of sludge drying device 9 bottoms, 900 ℃ of lower burnings.The flue gas that produces enters after separator 2 is isolated circulating ash in the back-end ductwork 4, and a circulating ash part is sent burner hearth 1 through material returning device 3 back to from the returning charge mouth of burner hearth 1 sidewall, and another part enters sludge drying device 9.The fluidizing gas A of sludge drying device 9 is that on the lower the air preheater 6 of below is preheating to 150 ℃ hot-air through the position.
Falling heat-transfer oil in the heat release coil pipe 10 in heat exchanger 5 and the sludge drying device 9.Conduction oil absorbs heat in the high-temperature flue gas from back-end ductwork 4 in heat exchanger 5, and heat release in the heat release coil pipe 10 in sludge drying device 9 makes sludge drying device 9 keep 85 ℃ operating temperature.
Desulfurization adds from material returning device 3 with agstone, sends into burner hearth 1 with circulating ash.
Claims (2)
1. a wet mud burning treatment apparatus comprises recirculating fluidized bed burner hearth (1), separator (2), material returning device (3), back-end ductwork (4), deduster (7), chimney (8) and auxiliary system; Also comprise fluidized bed type sludge drying device (9), sludge drying device (9) top is provided with weary gas outlet and the mud entrance that wets, and the bottom is provided with air-distribution device, dewatered sludge outlet, and inside is provided with the heat release coil pipe (10) that is filled with heat transferring medium; Be provided with air preheater (6) in the back-end ductwork (4) and be filled with the heat exchanger (5) of heat transferring medium, heat exchanger (5) is connected with heat release coil pipe (10) in the sludge drying device (9); Burner hearth (1) lower sidewall is provided with overfiren air port, returning charge mouth and dewatered sludge entrance; The dewatered sludge entrance is connected with the dewatered sludge outlet of sludge drying device (9), and overfiren air port is connected with the weary gas outlet of sludge drying device (9), it is characterized in that,
Described overfiren air port or returning charge mouth are also as the charge door that adds desulfurizing agent to burner hearth (1); Described deduster (7) also is provided with column for smoke purification before, and column for smoke purification increases in flue gas and the stove the not time of contact of the desulfurizing agent of complete reaction, and utilizing simultaneously in the flue gas in a large number, the humidification activation effect of steam makes desulphurization reaction carry out more fully.
2. by wet mud burning treatment apparatus claimed in claim 1, it is characterized in that, be provided with two air preheaters (6) in the described back-end ductwork (4), the air outlet slit of the air preheater of upstream (6) links to each other with burner hearth (1) bottom bellows, and the air outlet slit of the air preheater in downstream (6) links to each other with the air-distribution device of sludge drying device (9) bottom.
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| CN 201210011814 CN102531324B (en) | 2008-10-29 | 2008-10-29 | Wet sludge drying and incinerating treatment device |
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| CN 201210011814 CN102531324B (en) | 2008-10-29 | 2008-10-29 | Wet sludge drying and incinerating treatment device |
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| CNA2008102249969A Division CN101387404A (en) | 2008-10-29 | 2008-10-29 | Wet sludge drying, incinerating and treating device |
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| CN102887619A (en) * | 2012-11-02 | 2013-01-23 | 张开晓 | Water-containing sludge treatment method |
| FI125978B (en) * | 2013-02-22 | 2016-05-13 | Endev Oy | Rotary mass dryer and method for drying wet sludge |
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| CN2173355Y (en) * | 1993-10-21 | 1994-08-03 | 哈尔滨工业大学 | Industrial mud circulation fluidized-bed incinerator |
| CN100453905C (en) * | 2005-06-21 | 2009-01-21 | 中国科学院工程热物理研究所 | Wet sludge drying and incinerating treatment method employing circulating fluidized bed with combined dryer |
| CN100420643C (en) * | 2006-09-27 | 2008-09-24 | 北京中科通用能源环保有限责任公司 | Sludge drying and incinerating treatment process |
| CN101290121B (en) * | 2007-04-18 | 2011-02-09 | 深圳市环源科技发展有限公司 | Wet sludge anhydration burning processing system and process |
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