CN109611870A - A kind of sludge shaft furnace incineration treatment method and device - Google Patents
A kind of sludge shaft furnace incineration treatment method and device Download PDFInfo
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- CN109611870A CN109611870A CN201811552812.1A CN201811552812A CN109611870A CN 109611870 A CN109611870 A CN 109611870A CN 201811552812 A CN201811552812 A CN 201811552812A CN 109611870 A CN109611870 A CN 109611870A
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- 239000010802 sludge Substances 0.000 title claims abstract description 113
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000002485 combustion reaction Methods 0.000 claims abstract description 40
- 238000001035 drying Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 230000007423 decrease Effects 0.000 claims abstract description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 39
- 239000003546 flue gas Substances 0.000 claims description 39
- 239000007789 gas Substances 0.000 claims description 34
- 238000012545 processing Methods 0.000 claims description 24
- 239000000779 smoke Substances 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000007599 discharging Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 230000005484 gravity Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 239000010801 sewage sludge Substances 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 3
- 239000003517 fume Substances 0.000 claims 1
- 238000005086 pumping Methods 0.000 claims 1
- 230000000391 smoking effect Effects 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 10
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 239000002918 waste heat Substances 0.000 description 10
- 238000009833 condensation Methods 0.000 description 8
- 230000005494 condensation Effects 0.000 description 8
- 239000000126 substance Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 244000144985 peep Species 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 235000004443 Ricinus communis Nutrition 0.000 description 1
- 240000000528 Ricinus communis Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 239000002351 wastewater Substances 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1807—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines using the exhaust gases of combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Gasification And Melting Of Waste (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of sludge shaft furnace incineration treatment method and device, shaft furnace uses cavity structure, and sludge is sent directly into shaft furnace by closed feeding device from shaft furnace furnace roof, and combustion air is passed through by high pressure blower from shaft furnace bottom；The combustion air that high pressure blower blasts contacts with the lime-ash after sludge incineration and carries out heat exchange heating, then contacting with the hot sludge of the drying for reaching burning condition makes sludge incineration, the high temperature hot gas stream generated after burning flows up, high temperature hot gas stream contacts with the sludge being added from furnace roof and is dehydrated, is dried to sludge, the high temperature hot gas stream temperature of generation of burning simultaneously and pressure generate decline, in the exhanst gas outlet discharge of furnace roof setting.The direct burning disposal of sludge is carried out using sludge itself calorific value using method of the invention, system is simple, and process flow is short, and equipment investment is few, and the method promotional value of minimizing and harmless treatment as waste sludge is big.
Description
Technical field
The invention belongs to field of solid waste treating technology, in particular to a kind of sludge shaft furnace incineration treatment method and dress
It sets.
Background technique
Sludge refers to the industry containing large amount of organic or sanitary sewage, produces after sewage treatment plant carries out sewage treatment processing
Raw mud, mud obtain product after mechanical dehydration and are known as sludge.After sludge without appropriately handling disposition enters environment, directly
It connects and brings secondary pollution to water body and atmosphere, serious threat is constituted to the activity of ecological environment and the mankind.Sludge bring
Main Environmental Problems are as follows:
(1) moisture percentage in sewage sludge is high, and stacking area is big, pressing waste landfill yard storage capacity；
(2) sludge is particularly suitable for bacteria breed, and place is spread unchecked in the growth of sludge stockyard often all kinds of harmful bacterias；
(3) sludge easily dissipates foul smell and peculiar smell, causes serious atmosphere pollution.
Sludge is mainly made of microorganism, hardly degraded organic substance and other metals and nonmetalloid.In dry dirt
Volatile matter accounts for about 50%-70% in mud, and ash content accounts for about 30%-50% or so, and wherein C content is about 20-30%, and H content is about
3%-5%, O content are about 20%-25%, and N content is about 3%-5%, and S content is about 1%-2%.
It is most thorough sludge specialized process method with the sludge disposal technology for burning as core.It can make in sludge
Organic matter is all carbonized and burns, burns pathogen to death while burning, can be to the dirt containing heavy metal or chemical pollutant
Mud realizes complete deactivation processing, can reduce pollution to greatest extent, and the burning ash or clinker that generate after burning can be used as
Improve soil, production building materials etc..
The substances such as organic matter have certain calorific value in sludge, which can be used as the heat source of sludge itself burning, can also
Using the heat source as evaporation sludge contained humidity.
Since sludge contained humidity is higher, sludge is difficult to directly burn.Other auxiliary fuels are added when generalling use burning
The so-called coordination incineration treatment technology of (such as: coal, biomass fuel), mainly thermal power generation original system cooperatively processing sludge.
Dry and burning is besides divided into two systems.
Although there is vertical burning facility in the prior art, realizes and set dry and two technical process of burning at one
Standby interior completion.But the equipment of prior art construction is complicated, and complicated internal structure, including multiple groups are provided with usually in furnace
The scattered castor bean cone and preheating comb basin of different angle combination are stacked mechanism, dry fire grate and the scraper plate on dry fire grate up and down,
Lime-ash is crushed tower comb, scum pipe etc. internal mechanism.This scheme, sludge incineration is to realize under normal pressure in furnace, and scheme is practical
The effect of imagination can not be obtained, complicated structure can stop sludge to fall instead in furnace, be easy blocking comb hole, it is difficult to practical fortune
Row.
Therefore, the present invention overcomes the drawbacks of above technology and deficiency, using simplest cavity shaft furnace structure, combined process
Design realizes sludge and directly burns.
Summary of the invention
In view of the deficienciess of the prior art, the present invention provides a kind of sludge shaft furnace incineration treatment method and device, use
Drying is continuously finished in a device systems with two processes are burned, realizes sludge and directly burn by cavity shaft furnace.Not only
Equipment investment is reduced, and internal cavity structures avoid possible operation troubles and plant maintenance caused by internal labyrinth and protect
This is formed, process flow is shortened, improves treatment effeciency.The technical problem to be solved is that:, equipment dimension simple using structure
Shield maintains easy cavity shaft furnace, and exploitation designs the process of reasonable direct motion, realizes that sludge directly burns.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is that:
A kind of sludge shaft furnace incineration treatment method, using the shaft furnace of cavity structure, sludge by closed feeding device from
Shaft furnace furnace roof is sent directly into shaft furnace, is acted on from the top down according to material gravity, fills dirt after hygroscopic state sewage sludge, drying and dehydrating naturally
Mud, the sludge in combustion state, red heat lime-ash after burning, it is cooling after lime-ash；Sludge moves from the top down under the effect of gravity,
Removing moisture content is contacted with the high temperature hot gas stream flowed up, while sludge temperature is stepped up, until temperature, degree of drying reach
Burning condition；The hot sludge of drying for reaching burning condition, which continues to move down to contact with the combustion air that bottom enters, to be fired
It burns；The combustion air that sludge is completed to continue to move down with enter shaft furnace as lime-ash after burning contacts and carries out heat exchange, ash
The reduction of slag temperature is gathered in furnace bottom and shaft furnace is discharged from furnace bottom by closed discharging device.
Further, combustion air is blasted in shaft furnace from vertical furnace bottom by high pressure blower, and what high pressure blower blasted helps
Combustion air contacts with the lime-ash after sludge incineration and carries out heat exchange heating, then connects with the hot sludge of drying for reaching burning condition
Touching makes sludge incineration, and the high temperature hot gas stream generated after burning flows up, and high temperature hot gas stream is contacted with the sludge being added from furnace roof
And sludge is dehydrated, is dried, while the high temperature hot gas stream temperature for generation of burning and pressure generate decline, flue gas by
The exhanst gas outlet discharge of furnace roof setting, until smoke processing system.
Combustion air is blasted by high pressure blower, blast pressure depend on sludge characteristics, furnace type structure generate windage and
The setting of furnace top pressure.The smoke processing system for receiving flue gas is equipped with the air-introduced machine of drawing smoke, then furnace top pressure is set as micro-
Negative pressure；The smoke processing system for receiving flue gas does not set the air-introduced machine of drawing smoke, then furnace top pressure is set as positive pressure, and furnace roof is just
Pressing element, which has, sends out the enough pressure of smoke processing system, no less than 2KPa for flue gas.
Combustion air is passed directly into or is passed through again after heating up with flue gas heat exchange.
The present invention also provides a kind of devices for sludge shaft furnace incineration treatment method above-mentioned, which includes cavity
The shaft furnace of structure；
It is located at the exhanst gas outlet and closed feeding device of shaft furnace furnace roof；
It is located at the combustion air inlet at vertical furnace bottom and is sent into the high pressure blower of combustion air；
It is located at the closed discharging device at vertical furnace bottom；
For lighting the ignition system of combustion air；
And to the smoke processing system that flue gas is further processed.
Further, which further includes air preheater and waste heat of condensation boiler, and the flue gas of exhanst gas outlet enters air
Preheater and air carry out heat exchange, generate hot dry air and drain into ignition system, and flue gas is drained into waste heat of condensation boiler.
Further, the closed feeding device is screw(-type) feeder or vibrating feeder or the feed of intermittent unlatching
Tank.
Further, the closed discharging device is spiral discharging machine or electronic rotation valve.
Compared with prior art, the invention has the advantages that:
Using cavity shaft furnace, drying is continuously finished in a device systems with two processes are burned, realizes sludge
Directly burn.
Flue gas heat is made full use of, combustibles are only consumed when system is opened and utilize sludge itself calorific value after system operation
The direct burning disposal of sludge is carried out, the heat for fully relying on sludge incineration generation maintains systems stay operation, reduces equipment investment
It is big with the method promotional value of equipment maintenance expense, minimizing and harmless treatment as waste sludge.
Internal cavity structures avoid possible operation troubles and equipment maintenance cost, contracting caused by internal labyrinth
Short process flow, improves treatment effeciency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment 1；
Fig. 2 is the structural schematic diagram of embodiment 2.
Fig. 3 is the 1-1 cross-sectional view of Fig. 2.
1, shaft furnace；2, exhanst gas outlet；3, closed feeding device；4, combustion air inlet；5, closed discharging device；6, high pressure
Air blower；7, smoke processing system；8, ignition system；9, peep hole；10, gas distributor；11, blast pipe；12, air preheat
Device；13, waste heat of condensation boiler；14, air blower；16, fire grate；17, fire grate gray moving equipment；18, cloth tray is rotated.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is further illustrated.
Embodiment 1
As shown in Figure 1, a kind of sludge shaft furnace incinerating and treating device, shaft furnace 1 including cavity structure is located at 1 furnace roof of shaft furnace
Exhanst gas outlet 2 and closed feeding device 3, be located at 1 furnace bottom of shaft furnace combustion air inlet 4 and be sent into combustion air high pressure drum
Blower 6, the closed discharging device 5 for being located at 1 furnace bottom of shaft furnace and the smoke processing system 7 that flue gas is further processed, for being
The ignition system 8 of system starting.For the ease of situation in observation furnace, furnace body is equipped with peep hole 9.
Closed feeding device 3 can be with screw(-type) feeder or vibrating feeder or the feedstock vessel of intermittent unlatching, the present embodiment
Preferably screw(-type) feeder.Sludge is by being sent into screw(-type) feeder by feeding system and aggregate bin in sludge storage pool, by being set to furnace
The feed chute on top enters in furnace.
Closed discharging device 5 can be the machinery such as spiral discharging machine or electronic rotation valve, and the present embodiment 1 is preferably electronic rotation
The lime-ash of rotary valve, furnace bottom drains into ash collection trolley by electronic rotation valve, transports.
In order to enable combustion air is even into furnace, furnace bottom can also set gas distributor 10, and surrounding air is (combustion-supporting
Air) under the action of high pressure blower 6, it is directly over blast pipe 11 and enters in furnace.
Shaft furnace 1 involved in the device of the invention is non-standard equipment, needs to be designed according to treating capacity, sludge characteristics
Production, the equal regular market purchase of material for making shaft furnace obtain；The equal regular market purchase of other equipment involved in the device of the invention obtains.
Embodiment 2
Combustion air, can be first with flue gas by being passed through before entering shaft furnace 1 again after air preheater heat exchange heating.Such as
Shown in Fig. 2 and 3, at exhanst gas outlet 2, setting is used for the air preheater 12 and waste heat of condensation boiler 13 of warm-up combustion-supporting air,
The flue gas of exhanst gas outlet 2 enters air preheater 12 and carries out heat exchange with the air blasted by air blower 14, generates the dry sky of heat
Gas simultaneously drains into ignition system 8, is passed through furnace bottom by air inlet pipe again after being mixed and burned heating with combustion-supporting gas (natural gas).Flue gas warp
Temperature is declined after crossing air preheater 12, and drains into waste heat of condensation boiler 13, with the water of waste heat of condensation boiler 13 again into
After row heat exchange, flue gas enters back into smoke processing system 7 and is further handled and discharged.Water is converted into vapor, can other than
For.
The fire grate 16 of the lime-ash blocking furnace bottom of furnace bottom in order to prevent, can also set fire grate gray moving equipment 17, can periodically dial
It is dynamic.Can be according to sludge characteristics, for example when moisture content is higher, can choose the setting rotation cloth tray 18 in furnace, rotate cloth
The uniformly distributed circular hole passed through convenient for mud granule on disk 18, rotation cloth tray 18 drive rotation by being set to a motor of furnace roof
Turn, for the falling more evenly by sludge, it is dry faster, burning it is more abundant.
The present embodiment 2 is identical as the other structures design of embodiment 1, and details are not described herein again for identical structure design.
Embodiment 3
Sludge shaft furnace incineration treatment method of the invention be use cavity shaft furnace 1, sludge by closed feeding device 3 from
Shaft furnace furnace roof is sent directly into shaft furnace, is acted on from the top down according to material gravity, fills dirt after hygroscopic state sewage sludge, drying and dehydrating naturally
Mud, the sludge in combustion state, red heat lime-ash after burning, it is cooling after lime-ash.Sludge moves from the top down under the effect of gravity,
It is contacted with the high temperature hot gas stream flowed up, gradually removing adsorbs water, Interstitial Water, in conjunction with water, while sludge temperature is stepped up,
Until temperature, degree of drying reach burning condition；The hot sludge of drying for reaching burning condition continues to move down to be entered with bottom
Combustion air contact occur burn and generate open fire.Sludge continues to move down and enters shaft furnace after completing burning as lime-ash
Combustion air contact and carry out heat exchange, sludge is gradually become the light color such as white, grey, faint yellow, ash temperature from red heat
It is gathered in furnace bottom after reduction, shaft furnace 1 is discharged from furnace bottom by closed discharging device 5.
Combustion air is blasted in shaft furnace 1 from 1 furnace bottom of shaft furnace by high pressure blower 6, the combustion air that high pressure blower 6 blasts
It is contacted with the lime-ash after sludge incineration and carries out heat exchange heating, then contacting with the hot sludge of the drying for reaching burning condition makes dirt
Mud burning, the high temperature hot gas stream generated after burning flow up, and high temperature hot gas stream contacts with the sludge being added from furnace roof and to dirt
Mud is dehydrated, is dried, while the high temperature hot gas stream temperature for generation of burning and pressure generate decline, and flue gas in furnace roof by setting
The exhanst gas outlet 2 set is discharged, until smoke processing system 7.
Combustion air is blasted by high pressure blower 6, blast pressure depend on sludge characteristics, furnace type structure generate windage and
The setting of furnace top pressure.The smoke processing system 7 for receiving flue gas is equipped with the air-introduced machine of drawing smoke, then furnace top pressure is set as micro-
Negative pressure；The smoke processing system 7 for receiving flue gas does not set the air-introduced machine of drawing smoke, then furnace top pressure is set as positive pressure, furnace roof
Positive pressure, which has, sends out the enough pressure of smoke processing system 7, no less than 2KPa for flue gas.The control of the blow rate required of high pressure blower
System controls coefficient of excess air between 1.1 to 1.6 according to sludge calorific value is added.
Technical process in furnace is as follows: combustion air is contacted with the lime-ash formed after the sludge incineration for being gathered in furnace bottom and is gone forward side by side
Row heat exchange, formed lime-ash cooling zone, combustion air pass through lime-ash cooling zone after further heat up, then with reach burning condition
Drying hot sludge contact make sludge incineration.
Combustion air is contacted and is burnt with the hot sludge of the drying for reaching burning condition, forms a combustion zone, combustion air
Become high-temperature flue gas by combustion zone, high-temperature flue gas continues to rise to contact with sludge and strengthens dry to sludge and promote sludge temperature
Degree forms sludge dewatering, dry section.Combination water and Interstitial Water in dry section bottom removing sludge are high at the top of dry section
Warm flue gas further removes the Interstitial Water in sludge and adsorbs water, and the removing of large quantity of moisture reduces rapidly flue-gas temperature, then
Flue gas is overflowed from the bed of material.
Furnace roof sets exhanst gas outlet 2 and discharges the flue gas overflowed from the bed of material, steams since the water that sludge contains all is evaporated into water
Vapour is discharged with flue gas, and flue gas water vapour ratio is very high.Furnace roof High water cut steam flue gas enters smoke processing system 7.
It elaborates, wraps to method for sludge treatment of the invention below with reference to sludge shaft furnace incinerating and treating device of the present invention
Include following steps:
1, system starts
Start high pressure blower 6, close the exhanst gas outlet 2 of furnace roof, checks the air-tightness of shaft furnace 1.Air-tightness qualification is then closed
High pressure blower 6 is closed, the exhanst gas outlet 2 of furnace roof is opened, is initially added into material.
Feeding system is opened, Xiang Shulu 1 is sent into the lime-ash after burning, and lime-ash is incorporated as the one third of shaft furnace dischargeable capacity
Left and right.
Combustibles, the combustibles such as firewood, lump coal, which are sent into, to shaft furnace 1 is incorporated as the one third or so of shaft furnace dischargeable capacity,
The combustion air inlet 4 for opening furnace bottom lights the combustibles of feeding with ignition system 8, starts high pressure blower 6, combustibles combustion
Burn generate hot stream temperature reach 500 DEG C or so after, starting closed feeding device 3 to shaft furnace 1 be added sludge to reach setting
Highly.
Flue-gas temperature declines rapidly after sludge is added in shaft furnace 1, as mud height is continued to decline to material position lower limit, opens again
Sludge is added to shaft furnace in dynamic closed feeding device 3, keeps sludge material position setting height.When lime-ash reaches it is a certain amount of when, start it is close
Discharging device 5 is closed periodically to slag tap.
2, the lime-ash being discharged from shaft furnace 1, as product after sludge incineration, uniformly send outside after collection.
3, the flue gas containing a large amount of water vapours that exhanst gas outlet 2 is discharged enters smoke processing system 7 and is further processed, up to standard
Discharge.
4, the structure as shown in using embodiment 2, combustion air first can pass through sky with flue gas before entering shaft furnace 1
It is passed through again after air preheater heat exchange heating.At exhanst gas outlet 2, setting is for the air preheater 12 of warm-up combustion-supporting air and cold
Solidifying waste heat boiler 13, the flue gas of exhanst gas outlet 2 enter air preheater 12 and carry out hot friendship with the air blasted by air blower 14
It changes, generate hot dry air and drains into ignition system 8, it is logical by air inlet pipe again after mixing heating with combustion-supporting gas (natural gas) burning
Enter furnace bottom.Flue gas temperature after air preheater 12 is declined, and drains into waste heat of condensation boiler 13, with waste heat of condensation boiler
After 13 water carries out heat exchange again, flue gas enters back into smoke processing system 7 and is further handled and discharged.Water is converted into water
Steam can supply in addition.Its ingredient of lime-ash obtained after method processing sludge of the invention depends on the chemical component of composition sludge,
Mainly processing sanitary wastewater generate sludge, grey slag ingredient by dust in air substance deposition converge, as calcium, silicon,
Magnesium, aluminium, iron oxide.All burning is clean for the organisms such as organic matter, bacterium in sludge, and moisture all evaporates, and evaporates
Water vapour is in a large amount of outer water vapours supplied of condensing waste heat boiler production.
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, the art
Those of ordinary skill, within the essential scope of the present invention, the variations, modifications, additions or substitutions made all should belong to the present invention
Protection scope.
Claims (5)
1. a kind of sludge shaft furnace incineration treatment method, which is characterized in that using the shaft furnace of cavity structure, sludge is given by closed
Material device is sent directly into shaft furnace from shaft furnace furnace roof, is acted on from the top down according to material gravity, fills hygroscopic state sewage sludge naturally, drying takes off
Sludge, the sludge in combustion state after water, red heat lime-ash after burning, it is cooling after lime-ash；Sludge under the effect of gravity on to
Lower movement contacts removing moisture content with the high temperature hot gas stream flowed up, while sludge temperature is stepped up, until temperature, drying
Degree reaches burning condition；The hot sludge of drying for reaching burning condition continues to move down to be contacted with the combustion air of bottom entrance
It burns；The combustion air that sludge is completed to continue to move down with enter shaft furnace as lime-ash after burning contacts and carries out hot friendship
It changes, ash temperature reduction is gathered in furnace bottom and shaft furnace is discharged from furnace bottom by closed discharging device.
2. sludge shaft furnace incineration treatment method according to claim 1, which is characterized in that combustion air from vertical furnace bottom by
High pressure blower blasts in shaft furnace, and the combustion air that high pressure blower blasts contacts with the lime-ash after sludge incineration and carries out hot friendship
Heating is changed, then contacting with the hot sludge of the drying for reaching burning condition makes sludge incineration, the high temperature hot gas flow direction generated after burning
Upper flowing, high temperature hot gas stream contacts with the sludge being added from furnace roof and is dehydrated, is dried to sludge, while the height for generation of burning
Warm gas flow temperature and pressure generate decline, and flue gas is discharged by the exhanst gas outlet being arranged in furnace roof, until smoke processing system.
3. sludge shaft furnace incineration treatment method according to claim 2, which is characterized in that receive the fume treatment system of flue gas
System is equipped with the air-introduced machine of drawing smoke, then furnace top pressure is set as tiny structure；The smoke processing system for receiving flue gas does not set pumping
The air-introduced machine of smoking gas, then furnace top pressure is set as positive pressure, and furnace roof positive pressure has flue gas submitting smoke processing system is enough
Pressure, no less than 2KPa.
4. sludge shaft furnace incineration treatment method according to claim 2, which is characterized in that combustion air be passed directly into or with
It is passed through again after flue gas heat exchange heating.
5. being used for the device of sludge shaft furnace incineration treatment method described in claim 1, which is characterized in that including cavity structure
Shaft furnace, the exhanst gas outlet for being located at shaft furnace furnace roof and closed feeding device are located at the combustion air inlet at vertical furnace bottom and feeding helps
Fire air high pressure blower, be located at the closed discharging device at vertical furnace bottom, the ignition system for lighting combustion air and
The smoke processing system that flue gas is further processed.
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| CN110566975A (en) * | 2019-10-12 | 2019-12-13 | 宜清环境技术有限公司 | Sludge combustion system of waste incineration power plant |
| CN115585465A (en) * | 2022-10-14 | 2023-01-10 | 北京华宇辉煌生态环保科技股份有限公司 | Garbage treatment regulation and control system and method |
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