CN108800164A - Sludge drying and incineration heat balance treatment system and method - Google Patents
Sludge drying and incineration heat balance treatment system and method Download PDFInfo
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- CN108800164A CN108800164A CN201810742757.6A CN201810742757A CN108800164A CN 108800164 A CN108800164 A CN 108800164A CN 201810742757 A CN201810742757 A CN 201810742757A CN 108800164 A CN108800164 A CN 108800164A
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- foul smell
- heating device
- heat
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- 239000010802 sludge Substances 0.000 title claims abstract description 126
- 238000001035 drying Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 70
- 239000003546 flue gas Substances 0.000 claims abstract description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000779 smoke Substances 0.000 claims description 56
- 239000007789 gas Substances 0.000 claims description 39
- 230000008676 import Effects 0.000 claims description 20
- 238000004332 deodorization Methods 0.000 claims description 16
- 230000001502 supplementing effect Effects 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 239000010801 sewage sludge Substances 0.000 claims description 9
- 239000010865 sewage Substances 0.000 claims description 7
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 5
- 239000000567 combustion gas Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 238000009384 sea disposal Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/10—Drying by heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/10—Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/12—Sludge, slurries or mixtures of liquids
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention provides a sludge drying incineration heat balance treatment system and method, aiming at the problem that sludge with higher water content and lower dry basis heat value cannot realize self heat balance in the drying incineration treatment process, cold air is preheated by utilizing high-temperature odor containing water vapor discharged in the sludge drying process, then the preheated air is reheated by adopting an auxiliary heating device, the reheated air is finally subjected to heat exchange with incineration hot flue gas to form hot air, and the heat of the hot air is not lower than that required by sludge drying. By adopting the sludge drying and incinerating method, the heat balance of the sludge drying and incinerating can be realized.
Description
Technical field
The present invention relates to sludge treatment field more particularly to a kind of sludge anhydration burning thermal balance processing systems and method.
Background technology
In the collection of municipal sewage and disposal process, a large amount of sludge is necessarily will produce, sludge has the content of organic matter
Feature more, easily smelly, yield is big, moisture content is high.Currently, the main method of developed country's disposing sludge has land use, defends
Raw landfill, sea disposal, sludge anhydration burning.Various methods of disposal respectively have advantage and disadvantage, Heavy Metals in Sludge and germ to constrain
Sludge landfill characteristics；Sanitary landfills needs larger landfill space, since moisture percentage in sewage sludge height causes yield big, has not had more
Space is used for sanitary landfills；Sea disposal can cause marine ecosystems and human foods chain because easily causing marine pollution
It threatens, the stopping signed with EU countries no longer uses substantially to ocean dumping sludge protocol validation.Sludge drying is burnt
Burning is widely used in sludge treatment field, and is widely used for one of the most effectual way of thorough disposing sludge in the world.
Sludge anhydration burning method can destroy the institutional framework of waste, eliminate harmful components at high temperature, significantly reduce rubbish rapidly
The volume of rubbish, and the recoverable energy, can disposably realize industrial refuse handle innoxious, minimizing, recycling purpose.
Wastewater treatment in China brand-name computer tool dewatered sludge moisture content mostly 80% ~ 83%, most of content of organics 60% with
Under, the influence according to sludge solid content and content of organics to burning, sludge, which directly burns, cannot rely on the heat maintenance of itself
Ignition temperature wants self-sustaining burning, the moisture content of sludge to be less than 30%.Desiccation is typically considered two independent works with burning
Skill process, in fact, it is very difficult that the sludge Jing Guo desiccation, which does not carry out directly burning,.General sludge drying institute calorific requirement
Larger, according to the property of current sludge, the heat only discharged by sludge incineration can not meet the requirement of wet sludge anhydration,
It also needs to provide the energy balance that additional energy could realize sludge drying and incineration system.It therefore, can be by being carried out to sludge
Pretreatment ensures that the heat of follow-up anhydration and incineration is flat by improving sludge dewatering efficiency, or the mode of raising sludge dry base heat value
Weighing apparatus, but increase Treatment of Sludge flow in this way, some medicaments will certainly be introduced when improving processing cost, also, pre-processing, it may
Cause secondary pollution.
Invention content
The present invention higher, lower sludge of dry base heat value for moisture content, can not achieve in anhydration and incineration processing procedure
Itself thermally equilibrated problem, the high temperature foul smell containing vapor being discharged using sludge drying course carry out pre-add to cold air
Heat, then use assisted heating device, to after preheating air reheat, reheat air finally with burn heat smoke heat exchange at
Heat for hot-air, hot-air is not less than sludge drying institute calorific requirement.Using the sludge anhydration burning method, it can be achieved that sludge
Anhydration and incineration thermal balance.
The technical solution adopted by the present invention is：
A kind of sludge anhydration burning thermal balance processing system, which is characterized in that including desiccation apparatus, incinerator, pre-add hot charging
Set, assisted heating device, smoke heat replacing device, smoke eliminator, deodorization device, the desiccation apparatus be equipped with desiccation apparatus into
Material mouth, desiccation apparatus discharge port, desiccation apparatus air inlet and the outlet of desiccation apparatus foul smell；The incinerator is equipped with incinerator
Feed inlet, incinerator gas supplementing opening, incinerator slag outlet and incinerator exhanst gas outlet；The preheating apparatus is equipped with pre-
The import of heating device foul smell, the outlet of preheating apparatus foul smell, preheating apparatus inlet of cold air and preheating apparatus air outlet slit；
The assisted heating device is equipped with the import of assisted heating device foul smell, the outlet of assisted heating device foul smell, assisted heating device sky
Gas import and assisted heating device air outlet slit；The smoke heat replacing device is equipped with smoke heat replacing device gas inlet, flue gas changes
Thermal exhanst gas outlet, smoke heat replacing device air intlet and smoke heat replacing device hot air outlet；The desiccation apparatus discharging
Mouth is connected with the incinerator feed inlet；The desiccation apparatus foul smell outlet is connected with the preheating apparatus foul smell import
It connects；The sludge incineration device exhanst gas outlet is connected with the smoke heat replacing device gas inlet；The preheating apparatus is smelly
Gas outlet is connected with the assisted heating device foul smell import；The preheating apparatus air outlet slit is filled with auxiliary heating
Air intlet is set to be connected；Assisted heating device foul smell outlet and the deodorization device be connected；The auxiliary heating
Device air outlet slit is connected with the smoke heat replacing device air intlet and the sludge incineration device gas supplementing opening；The flue gas
Heat-exchanger rig exhanst gas outlet is connected with the smoke eliminator；The smoke heat replacing device hot air outlet and the desiccation
Device air inlet is connected.
Further, further include hot-air circulating fan, be set to the inner circulating tube road of the mud drying device.
Further, further include：Wet-emitting blower is located at desiccation apparatus foul smell outlet and the preheating apparatus foul smell
On pipeline between import；Cold wind wind turbine, be located at the preheating apparatus air outlet slit and the assisted heating device air into
On pipeline between mouthful；Foul smell wind turbine, the pipeline being located between assisted heating device foul smell outlet and the deodorization device
On；Warm wind wind turbine, the pipeline between the assisted heating device air outlet slit and the smoke heat replacing device air intlet
On；Air-heater, on the pipeline between the smoke heat replacing device hot air outlet and the desiccation apparatus air inlet.
Further, further include valve, on the pipeline between the warm wind wind turbine and the incinerator gas supplementing opening.
Further, the assisted heating device further includes：Condenser pipe, expansion valve, evaporator, compressor.
Further, the desiccation apparatus be tray dryer, channel oven, belt dryer, revolving drier,
One kind in pneumatic conveyer dryer, fluidized bed dryer.
Further, the assisted heating device is lithium bromide chiller.
A kind of sludge anhydration burning thermal balance treating method, includes the following steps：
1. the wet mud that municipal sewage plant generates is delivered into drying device, wet mud is heated empty in drying device
Gas heats, the moisture evaporation in sludge, and generates the foul smell containing vapor, and the dirt after drying is formed after wet mud evaporable water
Mud；
2. step 1. in the foul smell containing vapor exchange heat with cold air in preheating apparatus, the air after preheating enters auxiliary
It helps in heating device, using the foul smell after tentatively cooling down as heat source, heats again, after the foul smell after cooling enters deodorization device deodorization
Discharge, tonifying Qi of the air part as incinerator after heating again；
3. the step sludge that 1. middle drying is handled delivers into incinerator, heat smoke and clinker, clinker are generated through burning
Furnace body is discharged, heat smoke exchanges heat in smoke heat replacing device with the step air that 2. middle another part heats again, exchanges heat
Hot-air afterwards as step 1. in desiccation apparatus hot-air, the flue gas after cooling discharges after smoke eliminator is handled.
Further, the step 2. in the power resources of heat pump assisted heating device be in electricity, high-temperature steam, combustion gas
It is a kind of.
Further, the step 1. in wet mud moisture content≤85%, moisture percentage in sewage sludge≤30% after the drying,
Butt Lower heat value >=1700kcal/kg of the wet mud.
Beneficial effects of the present invention are：
1, energy saving, reduction sludge incineration processing cost.Sludge incineration is considered as sludge reduction, innoxious, money always
One of the best disposal options in source, but processing cost height limits the application of sludge incineration disposition.Since domestic sludge is more
Half content of organic matter is relatively low, moisture content is higher, therefore in sludge incineration cost of disposal, and sludge drying or sludge incineration help
Combustion agent accounts for significant proportion.A kind of sludge anhydration burning thermal balance processing system of the present invention and method, most by the thermal energy in system
Bigization utilization is upper, and improves the transformation efficiency of thermal energy, carries out being used for sludge drying after heating three times to cold air, meets sludge
Desiccation institute calorific requirement, realizes the thermal energy balance of sludge drying and incineration system, need not additionally add thermal energy, energy saving, reduction
Sludge incineration cost of disposal.
2, expand the sludge range for being suitable for sludge incineration processing.Moisture percentage in sewage sludge is higher, and thermal energy needed for desiccation is higher,
And the heat that the sludge incineration that moisture content is high or calorific value is low generates is few, this 2 points are to influence sludge drying and incineration system heat to put down
The principal element of weighing apparatus.In order to realize that sludge anhydration burning thermal balance, people considered raising sludge dewatering effect, pass through pretreatment
The method for improving sludge calorific value, increases process flow and intractability, but for conventional aqueous rate（75%~85%）, often
Advise calorific value（1700kcal/kg~2600kcal/kg）Sludge for, burn heat be still not enough to and desiccation institute calorific requirement
Reach thermal balance.The present invention to cold air once add by the higher steam-laden foul smell of the temperature generated with desiccation
Air temperature is improved 10 DEG C ~ 20 DEG C by heat, is carried out reheating to the air after preheating by assisted heating device, is made
Air themperature improves 10 DEG C ~ 25 DEG C again, is heated three times to air by flue gas heat exchange.With directly compared with flue gas heat exchange,
Air themperature 50 DEG C ~ 90 DEG C can be improved, in the case where maintaining system heat balance, the dry of burning sludge can be suitably reduced
Base Lower heat value so that it is previous to need directly carry out burning disposal by being further processed the sludge for just being suitable for burning,
Expand the range for the sludge that suitable burning mode is disposed.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art
With obtain other attached drawings according to these attached drawings.
Fig. 1 is the schematic diagram of a kind of sludge anhydration burning thermal balance processing system of the present invention and method.
In figure：1- desiccation apparatus, 2- incinerators, 3- preheating apparatus, 4- assisted heating devices, 5- flue gas heat exchanges dress
It sets, 6- smoke eliminators, 7- deodorization devices, 9- valves, 11- desiccation apparatus feed inlets, 12- desiccation apparatus discharge ports, 13-
Desiccation apparatus air inlet, the outlet of 14- desiccation apparatus foul smell, 21- incinerator feed inlets, 22- incinerator gas supplementing openings, 23- are burnt
Burning device slag outlet, 24- incinerator exhanst gas outlets, 31- preheating apparatus foul smell imports, 32- preheating apparatus foul smell go out
Mouthful, 33- preheating apparatus inlet of cold airs, 34- preheating apparatus air outlet slits, 41- assisted heating device foul smell imports, 42-
Assisted heating device foul smell exports, 43- assisted heating device air intlets, 44- assisted heating device air outlet slits, 45- condensations
Pipe, 46- expansion valves, 47- evaporators, 48- compressors, 51- smoke heat replacing device gas inlets, 52- smoke heat replacing device flue gases
Outlet, 53- smoke heat replacing device air intlets, 54- smoke heat replacing device hot air outlet 81- hot-air circulating fans, 82- rows
Wet blower, 83- cold wind wind turbines, 84- foul smell wind turbines, 85- warm wind wind turbines, 86- air-heaters.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
The technical solution adopted by the present invention is：
A kind of sludge anhydration burning thermal balance processing system, which is characterized in that including desiccation apparatus, incinerator, pre-add hot charging
Set, assisted heating device, smoke heat replacing device, smoke eliminator, deodorization device, the desiccation apparatus be equipped with desiccation apparatus into
Material mouth, desiccation apparatus discharge port, desiccation apparatus air inlet and the outlet of desiccation apparatus foul smell；The incinerator is equipped with incinerator
Feed inlet, incinerator gas supplementing opening, incinerator slag outlet and incinerator exhanst gas outlet；The preheating apparatus is equipped with pre-
The import of heating device foul smell, the outlet of preheating apparatus foul smell, preheating apparatus inlet of cold air and preheating apparatus air outlet slit；
The assisted heating device is equipped with the import of assisted heating device foul smell, the outlet of assisted heating device foul smell, assisted heating device sky
Gas import and assisted heating device air outlet slit；The smoke heat replacing device is equipped with smoke heat replacing device gas inlet, flue gas changes
Thermal exhanst gas outlet, smoke heat replacing device air intlet and smoke heat replacing device hot air outlet；The desiccation apparatus discharging
Mouth is connected with the incinerator feed inlet；The desiccation apparatus foul smell outlet is connected with the preheating apparatus foul smell import
It connects；The sludge incineration device exhanst gas outlet is connected with the smoke heat replacing device gas inlet；The preheating apparatus is smelly
Gas outlet is connected with the assisted heating device foul smell import；The preheating apparatus air outlet slit is filled with auxiliary heating
Air intlet is set to be connected；Assisted heating device foul smell outlet and the deodorization device be connected；The auxiliary heating
Device air outlet slit is connected with the smoke heat replacing device air intlet and the sludge incineration device gas supplementing opening；The flue gas
Heat-exchanger rig exhanst gas outlet is connected with the smoke eliminator；The smoke heat replacing device hot air outlet and the desiccation
Device air inlet is connected.
Further, further include hot-air circulating fan, be set to the inner circulating tube road of the mud drying device.
Further, further include：Wet-emitting blower is located at desiccation apparatus foul smell outlet and the preheating apparatus foul smell
On pipeline between import；Cold wind wind turbine, be located at the preheating apparatus air outlet slit and the assisted heating device air into
On pipeline between mouthful；Foul smell wind turbine, the pipeline being located between assisted heating device foul smell outlet and the deodorization device
On；Warm wind wind turbine, the pipeline between the assisted heating device air outlet slit and the smoke heat replacing device air intlet
On；Air-heater, on the pipeline between the smoke heat replacing device hot air outlet and the desiccation apparatus air inlet.
Further, further include valve, on the pipeline between the warm wind wind turbine and the incinerator gas supplementing opening.
Further, the assisted heating device further includes：Condenser pipe, expansion valve, evaporator, compressor.
Further, the desiccation apparatus be tray dryer, channel oven, belt dryer, revolving drier,
One kind in pneumatic conveyer dryer, fluidized bed dryer.
Further, the assisted heating device is lithium bromide chiller.
A kind of sludge anhydration burning thermal balance treating method, includes the following steps：
1. the wet mud that municipal sewage plant generates is delivered into drying device, wet mud is heated empty in drying device
Gas heats, the moisture evaporation in sludge, and generates the foul smell containing vapor, and the dirt after drying is formed after wet mud evaporable water
Mud；
2. step 1. in the foul smell containing vapor exchange heat with cold air in preheating apparatus, the air after preheating enters auxiliary
It helps in heating device, using the foul smell after tentatively cooling down as heat source, heats again, after the foul smell after cooling enters deodorization device deodorization
Discharge, tonifying Qi of the air part as incinerator after heating again；
3. the step sludge that 1. middle drying is handled delivers into incinerator, heat smoke and clinker, clinker are generated through burning
Furnace body is discharged, heat smoke exchanges heat in smoke heat replacing device with the step air that 2. middle another part heats again, exchanges heat
Hot-air afterwards as step 1. in desiccation apparatus hot-air, the flue gas after cooling discharges after smoke eliminator is handled.
Further, the step 2. in the power resources of heat pump assisted heating device be in electricity, high-temperature steam, combustion gas
It is a kind of.
Further, the step 1. in wet mud moisture content≤85%, moisture percentage in sewage sludge≤30% after the drying,
Butt Lower heat value >=1700kcal/kg of the wet mud.
Beneficial effects of the present invention are：
1, energy saving, reduction sludge incineration processing cost.Sludge incineration is considered as sludge reduction, innoxious, money always
One of the best disposal options in source, but processing cost height limits the application of sludge incineration disposition.Since domestic sludge is more
Half content of organic matter is relatively low, moisture content is higher, therefore in sludge incineration cost of disposal, and sludge drying or sludge incineration help
Combustion agent accounts for significant proportion.A kind of sludge anhydration burning thermal balance processing system of the present invention and method, most by the thermal energy in system
Bigization utilization is upper, and improves the transformation efficiency of thermal energy, carries out being used for sludge drying after heating three times to cold air, meets sludge
Desiccation institute calorific requirement, realizes the thermal energy balance of sludge drying and incineration system, need not additionally add thermal energy, energy saving, reduction
Sludge incineration cost of disposal.
2, expand the sludge range for being suitable for sludge incineration processing.Moisture percentage in sewage sludge is higher, and thermal energy needed for desiccation is higher,
And the heat that the sludge incineration that moisture content is high or calorific value is low generates is few, this 2 points are to influence sludge drying and incineration system heat to put down
The principal element of weighing apparatus.In order to realize that sludge anhydration burning thermal balance, people considered raising sludge dewatering effect, pass through pretreatment
The method for improving sludge calorific value, increases process flow and intractability, but for conventional aqueous rate（75%~85%）, often
Advise calorific value（1700kcal/kg~2600kcal/kg）Sludge for, burn heat be still not enough to and desiccation institute calorific requirement
Reach thermal balance.The present invention to cold air once add by the higher steam-laden foul smell of the temperature generated with desiccation
Air temperature is improved 10 DEG C ~ 20 DEG C by heat, is carried out reheating to the air after preheating by assisted heating device, is made
Air themperature improves 10 DEG C ~ 25 DEG C again, is heated three times to air by flue gas heat exchange.With directly compared with flue gas heat exchange,
Air themperature 50 DEG C ~ 90 DEG C can be improved, in the case where maintaining system heat balance, the dry of burning sludge can be suitably reduced
Base Lower heat value so that it is previous to need directly carry out burning disposal by being further processed the sludge for just being suitable for burning,
Expand the range for the sludge that suitable burning mode is disposed.
Embodiment 1
Certain sewage treatment plant's dewatered sludge, moisture content 85% partly use method of oxygen steel bomb to measure sludge butt low heat valve
For 3780kcal/kg, wet mud is placed in drying device, drying device hot wind intake air temperature is 200 DEG C, foul smell outlet temperature
It is 75 DEG C；Air themperature improves 20 DEG C after preheating, and air themperature improves 25 DEG C after auxiliary heating, the moisture percentage in sewage sludge after drying
It is 30%, dewatered sludge is burned, and incineration flue gas exchanges heat with 55 DEG C of air, and hot air temperature is 200 DEG C after heat exchange.It burns
It burns generation heat and desiccation institute calorific requirement can reach thermal balance.
Embodiment 2
Certain sewage treatment plant's dewatered sludge, moisture content 55% partly use method of oxygen steel bomb to measure sludge butt low heat valve
It for 1700kcal/kg, is burned, wet mud is placed in drying device, drying device hot wind intake air temperature is 120 DEG C, smelly
Gas outlet temperature is 55 DEG C；Air themperature improves 10 DEG C after preheating, and air themperature improves 25 DEG C after auxiliary heating, after dry
Moisture percentage in sewage sludge be 10%, dewatered sludge is burned, and incineration flue gas exchanges heat with 60 DEG C of air, hot-air temperature after heat exchange
Degree is 120 DEG C.It burns generation heat and desiccation institute calorific requirement can reach thermal balance.
Embodiment 3
Certain sewage treatment plant's dewatered sludge, moisture content 60% partly use method of oxygen steel bomb to measure sludge butt low heat valve
For 2500kcal/kg, wet mud is placed in drying device, drying device hot wind intake air temperature is 200 DEG C, foul smell outlet temperature
It is 70 DEG C；Air themperature improves 20 DEG C after preheating, and air themperature improves 25 DEG C after auxiliary heating, the moisture percentage in sewage sludge after drying
It is 20%, dewatered sludge is burned, and incineration flue gas exchanges heat with 60 DEG C of air, and hot air temperature is 200 DEG C after heat exchange.It burns
It burns and generates heat for after sludge drying, there remains heat 1740kJ/kg.
Claims (10)
1. a kind of sludge anhydration burning thermal balance processing system, which is characterized in that including desiccation apparatus（1）, incinerator（2）,
Preheating apparatus（3）, assisted heating device（4）, smoke heat replacing device（5）, smoke eliminator（6）, deodorization device（7）, institute
State desiccation apparatus（1）Equipped with desiccation apparatus feed inlet（11）, desiccation apparatus discharge port（12）, desiccation apparatus air inlet（13）With it is dry
Foul smell outlet is set in makeup（14）；The incinerator（2）Equipped with incinerator feed inlet（21）, incinerator gas supplementing opening（22）,
Incinerator slag outlet（23）With incinerator exhanst gas outlet（24）；The preheating apparatus（3）It is smelly equipped with preheating apparatus
Gas import（31）, preheating apparatus foul smell outlet（32）, preheating apparatus inlet of cold air（33）Go out with preheating apparatus air
Mouthful（34）；The assisted heating device（4）Equipped with assisted heating device foul smell import（41）, assisted heating device foul smell outlet
（42）, assisted heating device air intlet（43）With assisted heating device air outlet slit（44）；The smoke heat replacing device（5）If
There is smoke heat replacing device gas inlet（51）, smoke heat replacing device exhanst gas outlet（52）, smoke heat replacing device air intlet（53）
With smoke heat replacing device hot air outlet（54）；The desiccation apparatus discharge port（12）With the incinerator feed inlet（21）Phase
Connection；The desiccation apparatus foul smell outlet（14）With the preheating apparatus foul smell import（31）It is connected；The sludge incineration
Device exhanst gas outlet（24）With the smoke heat replacing device gas inlet（51）It is connected；The preheating apparatus foul smell outlet
（32）With the assisted heating device foul smell import（41）It is connected；The preheating apparatus air outlet slit（34）With the auxiliary
Heating device air intlet（43）It is connected；The assisted heating device foul smell outlet（42）With the deodorization device（7）With phase
Connection；The assisted heating device air outlet slit（44）With the smoke heat replacing device air intlet（53）With the sludge incineration
Device gas supplementing opening（22）It is connected；The smoke heat replacing device exhanst gas outlet（52）With the smoke eliminator（6）It is connected；
The smoke heat replacing device hot air outlet（54）With the desiccation apparatus air inlet（13）It is connected.
2. a kind of sludge anhydration burning thermal balance processing system as described in claim 1, which is characterized in that further include hot-air
Circulating fan（81）, it is set to the mud drying device（1）Inner circulating tube road.
3. a kind of sludge anhydration burning thermal balance processing system as described in claim 1, which is characterized in that further include：Hydrofuge
Wind turbine（82）, it is located at the desiccation apparatus foul smell and exports（14）With the preheating apparatus foul smell import（31）Between pipeline
On；Cold wind wind turbine（83）, it is located at the preheating apparatus air outlet slit（34）With the assisted heating device air intlet（43）
Between pipeline on；Foul smell wind turbine（84）, it is located at the assisted heating device foul smell and exports（42）With the deodorization device（7）It
Between pipeline on；Warm wind wind turbine（85）, it is located at the assisted heating device air outlet slit（44）With smoke heat replacing device sky
Gas import（53）Between pipeline on；Air-heater（86）, it is located at the smoke heat replacing device hot air outlet（54）With it is described
Desiccation apparatus air inlet（13）Between pipeline on.
4. a kind of sludge anhydration burning thermal balance processing system as claimed in claim 3, which is characterized in that further include valve
（9）, it is located at the warm wind wind turbine（85）With the incinerator gas supplementing opening（22）Between pipeline on.
5. a kind of sludge anhydration burning thermal balance processing system as described in claim 1, which is characterized in that the auxiliary heating
Device（4）Further include：Condenser pipe（45）, expansion valve（46）, evaporator（47）, compressor（48）.
6. a kind of sludge anhydration burning thermal balance processing system as described in claim 1, which is characterized in that the desiccation apparatus
（1）For in tray dryer, channel oven, belt dryer, revolving drier, pneumatic conveyer dryer, fluidized bed dryer
One kind.
7. a kind of sludge anhydration burning thermal balance processing system as described in claim 1, which is characterized in that the auxiliary heating
Device（4）For lithium bromide chiller.
8. a kind of sludge anhydration burning thermal balance treating method, which is characterized in that include the following steps：
1. the wet mud that municipal sewage plant generates is delivered into drying device（1）In, wet mud in drying device by
Hot air, the moisture evaporation in sludge, and the foul smell containing vapor is generated, after forming drying after wet mud evaporable water
Sludge；
2. step 1. in the foul smell containing vapor in preheating apparatus（3）In exchange heat with cold air, the air after preheating into
Enter assisted heating device（4）In, it using the foul smell after tentatively cooling down as heat source, heats again, the foul smell after cooling enters deodorization dress
It sets（7）It is discharged after deodorization, the air part after heating again is as incinerator（2）Tonifying Qi；
3. the step sludge that 1. middle drying is handled delivers into incinerator（2）In, generate heat smoke and clinker, stove through burning
Furnace body is discharged in slag, and heat smoke is with the step air that 2. middle another part heats again in smoke heat replacing device（5）In exchange heat,
Hot-air after heat exchange as step 1. in desiccation apparatus hot-air, the flue gas after cooling is through smoke eliminator（6）Processing
After discharge.
9. a kind of sludge anhydration burning thermal balance treating method as claimed in claim 8, which is characterized in that the step 2. in
The power resources of heat pump assisted heating device are one kind in electricity, high-temperature steam, combustion gas.
10. a kind of sludge anhydration burning thermal balance treating method as claimed in claim 8, which is characterized in that the step is 1.
Moisture content≤85% of middle wet mud, moisture percentage in sewage sludge≤30% after the drying, the butt Lower heat value of the wet mud >=
1700kcal/kg。
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| CN201810742757.6A CN108800164B (en) | 2018-07-09 | 2018-07-09 | Sludge drying incineration heat balance treatment system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115321785A (en) * | 2022-06-23 | 2022-11-11 | 上海仁创环境科技有限公司 | Energy-recovery solar sludge drying technology and working method thereof |
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| CN108800164B (en) | 2023-10-20 |
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