CN107640875A - Energy recovery type sludge drying and incineration system - Google Patents
Energy recovery type sludge drying and incineration system Download PDFInfo
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- CN107640875A CN107640875A CN201610580636.7A CN201610580636A CN107640875A CN 107640875 A CN107640875 A CN 107640875A CN 201610580636 A CN201610580636 A CN 201610580636A CN 107640875 A CN107640875 A CN 107640875A
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- heat
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Abstract
The invention belongs to sludge incineration processing technology field, and in particular to a kind of energy recovery type sludge drying and incineration system.Filter press is connected with blade drier, blade drier is connected with evaporator, evaporator is connected with fluidized bed incinerator, evaporator is connected with steam turbine, steam turbine is connected with condenser, condenser is connected with working medium pump, working medium pump is connected with evaporator, fluidized bed incinerator is connected with heat-condutive oil heat exchanger, and heat-condutive oil heat exchanger is connected with air preheater, and heat-condutive oil heat exchanger is connected with blade drier, air preheater is connected with fluidized bed incinerator, air preheater is connected with spray column, and spray column is connected with activated carbon eductor, and spray column is connected with sack cleaner.The present invention can solve the secondary pollution problems of high energy consumption present in current sludge incineration processing procedure, operating cost height and heavy metal.
Description
Technical field
The invention belongs to sludge incineration processing technology field, and in particular to a kind of energy recovery type sludge anhydration burning system
System.
Background technology
Sludge is caused byproduct during municipal sewage treatment, and yield is big and complicated component, to the end of the year 2014 whole nation
Accumulative to build up urban wastewater treatment firm more than 4400, sewage load reaches 1.57 billion cubic meters/day, and caused sludge quantity (contains
Water rate 80%) up to 40,000,000 tons/year, it is contemplated that it will break through 60,000,000 tons/year to the year two thousand twenty whole nation sludge yield.With minimizing, surely
Fixedization, innoxious, resource turn to principle, specific resistance to filtration method mainly has landfill, for farming fertilizer or construction material and
Thermal incineration technology.Wherein thermal incineration technology is sludge disposal technology most with prospects.
At present, the burning process of sludge is more ripe, has been obtained extensively in developed countries such as Europe, the U.S., Japan
Application, the sludge quantity of Japanese burning disposal in 1992 accounts for the 75% of municipal sludge total amount.China is in terms of Treatment of Sludge, at present
Most study limitation is agricultural in the compost of sludge, but compost it is agricultural can not solve heavy metal and noxious material to soil and
The pollution problem in river.Generally existing is handled for the current sludge incineration in China：Energy consumption is big, equipment is complicated, system operation not
The problems such as stable, cost height, heavy metal secondary pollution can not solve, so the emphasis of current sludge incineration technology is to improve system
System efficiency and stability, reduce operating cost, avoid burning the secondary pollution problem for generating product.
The content of the invention
The present invention proposes a set of energy recovery type sludge drying and incineration system, to solve in current sludge incineration processing procedure
The secondary pollution problems of existing high energy consumption, operating cost height and heavy metal.
To reach above-mentioned purpose, the technical solution used in the present invention is：
A kind of energy recovery type sludge drying and incineration system, including it is filter press, blade drier, evaporator, steam turbine, cold
Condenser, working medium pump, fluidized bed incinerator, heat-condutive oil heat exchanger, air preheater, spray column, activated carbon eductor and cloth bag remove
Dirt device；Filter press is connected with blade drier, and blade drier is connected with evaporator, and evaporator is connected with fluidized bed incinerator,
Evaporator is connected with steam turbine, and steam turbine is connected with condenser, and condenser is connected with working medium pump, and working medium pump is connected with evaporator,
Fluidized bed incinerator is connected with heat-condutive oil heat exchanger, and heat-condutive oil heat exchanger is connected with air preheater, heat-condutive oil heat exchanger and slurry
Leaf drying machine is connected, and air preheater is connected with fluidized bed incinerator, and air preheater is connected with spray column, spray column and activity
Charcoal injector is connected, and spray column is connected with sack cleaner.
Described blade drier is contact drying, and semi-oriented to use conduction oil, the temperature of conduction oil is 220 DEG C.
Described fluidized bed incinerator is adiabatic furnace, and incineration temperature is 800-1000 DEG C, using small blast cap cloth wind, simultaneously
Using tangential Secondary Air.
The course of work of the system is：Aqueous 90% sludge enters filter press and carries out mechanical dehydration, after mechanical dehydration
Moisture percentage in sewage sludge is 60%, the sludge after mechanical dehydration enter blade drier in carry out desiccation, it is semi-oriented after sludge it is aqueous
Rate is 40%, can produce 110-120 DEG C of superheated steam in the drying process, and superheated steam is discharged laggard from blade drier
Enter organic refrigerant evaporator, organic working medium is transferred heat to by indirect heat exchange in organic refrigerant evaporator, after heat exchange
Steam is changed into condensate and directly discharged, and incondensable gas is sent into fluidized bed incinerator by air-introduced machine, and organic working medium is in heat exchanger
In be heated, be changed into steam state, steam state organic working medium enters steam turbine and done work by the road, and steam turbine drive motor generates electricity, in steamer
After being done work in machine, organic working medium enters condensation in condenser and is changed into liquid, into working medium pump, is pressurized to be sent into working medium pump and steams
Send out device；Sludge after semi-oriented enters sludge storage bin from blade drier, is burnt sludge feeding fluid bed by feed screw
Burn stove to be burned, the ash content a portion of sludge in burning process is discharged from bed bottom, and a part is brought into subsequently by flue gas
Flow；High-temperature flue gas from fluidized bed incinerator discharge is 800-1000 DEG C, high-temperature flue gas successively by heat-condutive oil heat exchanger and
Air preheater, flue-gas temperature reduces to 120-140 DEG C after heat exchange, and the conduction oil in heat-condutive oil heat exchanger enters slurry after being heated
In leaf drying machine, for drying sludge, the conduction oil after heat exchange is entered heat exchanger again, while is absorbed heat in heat-condutive oil heat exchanger
When load is more than the use thermic load of blade drier, portion of energy more than needed is generated electricity for heating organic working medium, flue gas warp
Enter air preheater after crossing heat-condutive oil heat exchanger heat exchange, combustion air is preheated, air is through the laggard fluidized bed that exchanges heat
Incinerator is as combustion air；After air preheater, flue gas enters spray column, is reacted with alkaline solution, having in flue gas
Evil gas is adsorbed, and active charcoal injector, the flue gas with being discharged from spray column are reacted on flue, and two in flue gas
Evil English and heavy metal are adsorbed, and rear flue gas enters sack cleaner, and the flying dust in flue gas is adsorbed, after fume treatment, flue gas
Reach discharging standards, discharged.
Having the beneficial effect that acquired by the present invention：
The present invention carries out energy maximization recycling, the mode of energy regenerating to caused superheated steam in drying process
Using organic Rankine bottoming cycle cogeneration technology, caused electric energy can be used for the consumption of system share engineering.To the dirt after desiccation
Mud uses fluidized combustion technology, ensures to trap a part of heavy metal while burning thorough.Caused cigarette after burning
Gas waste heat is made full use of, and waste heat is used for heating steam or conduction oil, combustion air, reduces the operating cost of system.Flue gas
After-treatment system the discharge of flue gas can be made to meet national standard, reach the purpose of energy-conserving and environment-protective.
(1) energy is carried out to caused superheated steam in drying process using organic Rankine bottoming cycle (ORC) electricity generation system to return
Receive, eliminate condenser.The energy of superheated steam 12% can be reclaimed, energy-saving effect is notable.
(2) semi-oriented sludge and semi-oriented caused waste gas are burned using fluidized combustion technology, burned thorough
Bottom, capacity usage ratio is high, and load regulation range is wide.
(3) semi-oriented drying is carried out to sludge using steam or conduction oil, the design of drier heat-transfer surface is simple, system letter
It is single.
(4) sufficient utilization has been carried out to fume afterheat, superheated steam can be produced and be used for generating electricity or industrial.
(5) tail gas is fully handled, higher than the discharge standard of national requirements.
(6) waste heat recovery uses modular arrangement, can be adjusted according to the species of sludge, moisture content, calorific value etc..
Brief description of the drawings
Fig. 1 is energy recovery type sludge drying and incineration system structure chart of the present invention.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, energy recovery type sludge drying and incineration system of the present invention includes the press filtration for sludge dewatering
Machine, the blade drier for desiccation, the organic refrigerant evaporator for reclaiming drying process generation steam, steam turbine, condensation
Device and working medium pump, the fluidized bed incinerator for sludge incineration, the heat-condutive oil heat exchanger for energy regenerating and air preheater,
For absorbing the spray column of pickling material in flue gas, the activated carbon eductor for absorbing bioxin and heavy metal, for absorbing
The sack cleaner of dust.
Filter press is connected with blade drier, and blade drier is connected with evaporator, and evaporator connects with fluidized bed incinerator
Connect, evaporator is connected with steam turbine, and steam turbine is connected with condenser, and condenser is connected with working medium pump, and working medium pump connects with evaporator
Connect, fluidized bed incinerator is connected with heat-condutive oil heat exchanger, and heat-condutive oil heat exchanger is connected with air preheater, heat-condutive oil heat exchanger with
Blade drier is connected, and air preheater is connected with fluidized bed incinerator, and air preheater is connected with spray column, spray column and work
Property the connection of charcoal injector, spray column is connected with sack cleaner.
Aqueous first 90% sludge enters filter press and carries out mechanical dehydration, and the moisture percentage in sewage sludge after mechanical dehydration is
60%.Sludge after mechanical dehydration, which enters, carries out desiccation in blade drier, blade drier is contact drying, semi-oriented use
Conduction oil, the temperature of conduction oil is 220 DEG C, can also substitute conduction oil with steam.
Moisture percentage in sewage sludge after semi-oriented is 40% or so, can produce 110-120 DEG C of superheated steam in the drying process,
Superheated steam enters organic refrigerant evaporator after being discharged from blade drier, passes through indirect heat exchange in organic refrigerant evaporator
Organic working medium is transferred heat to, the steam after heat exchange is changed into condensate and directly discharged, and incondensable gas is sent into by air-introduced machine
Fluidized bed incinerator.Organic working medium is heated in heat exchanger, is changed into steam state.Steam state organic working medium is done into steam turbine by the road
Work(, steam turbine drive motor generate electricity.After being done work in steam turbine, organic working medium enters condensation in condenser and is changed into liquid, enters
Working medium pump, it is pressurized in working medium pump and is sent into evaporator.
Sludge after semi-oriented enters sludge storage bin from blade drier, and sludge is sent into fluid bed by feed screw
Incinerator is burned, and fluidized bed incinerator is adiabatic furnace, and the incineration temperature of incinerator is 800-1000 DEG C.Using small blast cap
Cloth wind, while tangential Secondary Air is used, increase incinerator turbulivity, ensure sludge completely burned.Sludge is in burning process
Ash content a portion is discharged from bed bottom, and a part brings follow-up process into by flue gas.
High-temperature flue gas from fluidized bed incinerator discharge is 800-1000 DEG C, and high-temperature flue gas passes through heat-condutive oil heat exchanger successively
And air preheater, flue-gas temperature reduces to 120-140 DEG C after heat exchange, and heat-condutive oil heat exchanger can also be substituted by waste heat boiler.
Conduction oil in heat-condutive oil heat exchanger enters in blade drier after being heated, for drying sludge.Conduction oil after heat exchange
Again enter heat exchanger.Meanwhile when heat-condutive oil heat exchanger heat absorption load is more than the use thermic load of blade drier, portion more than needed
Energy is divided to be generated electricity for heating organic working medium.Flue gas enters air preheater after heat-condutive oil heat exchanger exchanges heat, to helping
Combustion air is preheated.Air is through the laggard fluidized bed incinerator that exchanges heat as combustion air.
After air preheater, flue gas enters spray column, is reacted with alkaline solution, and the pernicious gas in flue gas is inhaled
It is attached.Active charcoal injector, the flue gas with being discharged from spray column are reacted on flue, bioxin and a huge sum of money in flue gas
Category is adsorbed.Flue gas enters sack cleaner afterwards, and the flying dust in flue gas is adsorbed.After fume treatment, flue gas reaches national row
Standard is put, is discharged.
Claims (4)
- A kind of 1. energy recovery type sludge drying and incineration system, it is characterised in that：Including filter press, blade drier, evaporator, Steam turbine, condenser, working medium pump, fluidized bed incinerator, heat-condutive oil heat exchanger, air preheater, spray column, activated carbon eductor And sack cleaner；Filter press is connected with blade drier, and blade drier is connected with evaporator, evaporator and fluidized combustion Stove is connected, and evaporator is connected with steam turbine, and steam turbine is connected with condenser, and condenser is connected with working medium pump, working medium pump and evaporation Device is connected, and fluidized bed incinerator is connected with heat-condutive oil heat exchanger, and heat-condutive oil heat exchanger is connected with air preheater, conduction oil heat exchange Device is connected with blade drier, and air preheater is connected with fluidized bed incinerator, and air preheater is connected with spray column, spray column It is connected with activated carbon eductor, spray column is connected with sack cleaner.
- 2. energy recovery type sludge drying and incineration system according to claim 1, it is characterised in that：Described paddle is dried Machine is contact drying, and semi-oriented to use conduction oil, the temperature of conduction oil is 220 DEG C.
- 3. energy recovery type sludge drying and incineration system according to claim 1, it is characterised in that：Described fluid bed burns Burning stove is adiabatic furnace, and incineration temperature is 800-1000 DEG C, using small blast cap cloth wind, while uses tangential Secondary Air.
- 4. energy recovery type sludge drying and incineration system according to claim 1, it is characterised in that：The system it is worked Cheng Wei：Aqueous 90% sludge enters filter press and carries out mechanical dehydration, and the moisture percentage in sewage sludge after mechanical dehydration is 60%, and machinery is de- Sludge after water, which enters, carries out desiccation in blade drier, it is semi-oriented after moisture percentage in sewage sludge be 40%, in the drying process can 110-120 DEG C of superheated steam is produced, superheated steam enters organic refrigerant evaporator after being discharged from blade drier, organic Organic working medium is transferred heat to by indirect heat exchange in working medium evaporator, the steam after heat exchange is changed into condensate and directly discharged, Incondensable gas is sent into fluidized bed incinerator by air-introduced machine, and organic working medium is heated in heat exchanger, is changed into steam state, steam state has Machine working medium enters steam turbine and done work by the road, and steam turbine drive motor generates electricity, and after being done work in steam turbine, organic working medium enters cold Condensation is changed into liquid in condenser, into working medium pump, is pressurized in working medium pump and is sent into evaporator；Sludge after semi-oriented is from paddle Drying machine enters sludge storage bin, is burned sludge feeding fluidized bed incinerator by feed screw, sludge was burning Ash content a portion in journey is discharged from bed bottom, and a part brings follow-up process into by flue gas；From fluidized bed incinerator discharge High-temperature flue gas is 800-1000 DEG C, and high-temperature flue gas passes through heat-condutive oil heat exchanger and air preheater, flue-gas temperature after heat exchange successively Reducing to 120-140 DEG C, the conduction oil in heat-condutive oil heat exchanger enters in blade drier after being heated, for drying sludge, Conduction oil after heat exchange is entered heat exchanger again, at the same heat-condutive oil heat exchanger heat absorption load be more than blade drier with heat During load, portion of energy more than needed is generated electricity for heating organic working medium, and flue gas enters after heat-condutive oil heat exchanger exchanges heat Air preheater, combustion air is preheated, air is through the laggard fluidized bed incinerator that exchanges heat as combustion air；It is pre- through air After hot device, flue gas enters spray column, is reacted with alkaline solution, and the pernicious gas in flue gas is adsorbed, and has work on flue Property charcoal injector, the flue gas with being discharged from spray column are reacted, and bioxin and heavy metal are adsorbed in flue gas, rear flue gas Into sack cleaner, the flying dust in flue gas is adsorbed, and after fume treatment, flue gas reaches discharging standards, is discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610580636.7A CN107640875A (en) | 2016-07-21 | 2016-07-21 | Energy recovery type sludge drying and incineration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610580636.7A CN107640875A (en) | 2016-07-21 | 2016-07-21 | Energy recovery type sludge drying and incineration system |
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| Publication Number | Publication Date |
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| CN107640875A true CN107640875A (en) | 2018-01-30 |
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| CN201610580636.7A Pending CN107640875A (en) | 2016-07-21 | 2016-07-21 | Energy recovery type sludge drying and incineration system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108434961A (en) * | 2018-04-18 | 2018-08-24 | 孙鹏 | Industrial waste gas purification device of low energy consumption |
| CN108911473A (en) * | 2018-08-30 | 2018-11-30 | 东莞市金茂污泥处置有限公司 | Direct heating type sludge drying charing mechanism |
| CN109185895A (en) * | 2018-11-02 | 2019-01-11 | 重庆富燃科技股份有限公司 | A kind of system and method handling the aging rubbish of landfill yard |
| CN110054389A (en) * | 2019-06-04 | 2019-07-26 | 四川洁能干燥设备有限责任公司 | Sewage sludge harmlessness disposing technique technology |
| CN110068013A (en) * | 2019-05-29 | 2019-07-30 | 上海环境工程设计研究院有限公司 | A kind of deeply de- anhydration and incineration electricity generation system of sludge |
| CN110822452A (en) * | 2019-12-03 | 2020-02-21 | 胡双双 | Sludge treatment equipment based on environmental protection |
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| CN205974207U (en) * | 2016-07-21 | 2017-02-22 | 北京航天石化技术装备工程有限公司 | Energy recuperation type sludge drying system of burning |
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Patent Citations (4)
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| JP2010255557A (en) * | 2009-04-27 | 2010-11-11 | Minoru Morita | Power generation method using exhaust gas from conductive heat transfer dryer and drying facility having power generation function |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108434961A (en) * | 2018-04-18 | 2018-08-24 | 孙鹏 | Industrial waste gas purification device of low energy consumption |
| CN108911473A (en) * | 2018-08-30 | 2018-11-30 | 东莞市金茂污泥处置有限公司 | Direct heating type sludge drying charing mechanism |
| CN108911473B (en) * | 2018-08-30 | 2023-10-24 | 金茂(深圳)生态科技有限公司 | Direct heating type sludge drying and carbonizing mechanism |
| CN109185895A (en) * | 2018-11-02 | 2019-01-11 | 重庆富燃科技股份有限公司 | A kind of system and method handling the aging rubbish of landfill yard |
| CN110068013A (en) * | 2019-05-29 | 2019-07-30 | 上海环境工程设计研究院有限公司 | A kind of deeply de- anhydration and incineration electricity generation system of sludge |
| CN110068013B (en) * | 2019-05-29 | 2024-03-08 | 上海环境工程设计研究院有限公司 | Sludge deep-dewatering drying incineration power generation system |
| CN110054389A (en) * | 2019-06-04 | 2019-07-26 | 四川洁能干燥设备有限责任公司 | Sewage sludge harmlessness disposing technique technology |
| CN110822452A (en) * | 2019-12-03 | 2020-02-21 | 胡双双 | Sludge treatment equipment based on environmental protection |
| CN110822452B (en) * | 2019-12-03 | 2021-05-14 | 北京能大环保科技有限公司 | Sludge treatment equipment based on environmental protection |
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