CN109824238A - A kind of coal-fired coupling sludge heating system and method - Google Patents
A kind of coal-fired coupling sludge heating system and method Download PDFInfo
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- CN109824238A CN109824238A CN201910161297.2A CN201910161297A CN109824238A CN 109824238 A CN109824238 A CN 109824238A CN 201910161297 A CN201910161297 A CN 201910161297A CN 109824238 A CN109824238 A CN 109824238A
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- dewatered
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- 239000010802 sludge Substances 0.000 title claims abstract description 140
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008878 coupling Effects 0.000 title claims abstract description 22
- 238000010168 coupling process Methods 0.000 title claims abstract description 22
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 22
- 238000010438 heat treatment Methods 0.000 title claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000002351 wastewater Substances 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 25
- 239000003245 coal Substances 0.000 claims description 8
- 230000018044 dehydration Effects 0.000 claims description 7
- 238000006297 dehydration reaction Methods 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 239000002912 waste gas Substances 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 238000011044 inertial separation Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000000446 fuel Substances 0.000 abstract description 4
- 231100000252 nontoxic Toxicity 0.000 abstract description 4
- 230000003000 nontoxic effect Effects 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Abstract
It include sludge pump, centrifugal drier, sludge drying machine, cyclone separator, condenser, water bed desulphurization system, dewatered sludge storehouse, batcher, steam boiler, steam turbine and heat pump system the invention discloses a kind of coal-fired coupling sludge heating system and method.Minimizing of the present invention, after disposing, sludge residue is only minimal amount of ash;Innoxious, the disposition product of sludge has dewatered sludge, waste water and exhaust gas, and dewatered sludge forms nontoxic ash through burning as fuel, and waste water enters water bed desulphurization system and recycles, and exhaust gas forms nontoxic gas after burning;Recycling, sludge are disposed through anhydration and incineration, have saved land resource, it reduces environmental pollution, dewatered sludge can save coal-fired consumption as fuel, and can get disposition subsidy, consider steam cost and power consumption, disposing sludge per ton can get 50~120 yuan of profit, and economic and social benefits are considerable.
Description
Technical field
The invention belongs to heat supply process fields, and in particular to a kind of coal-fired coupling sludge heating system and method.
Background technique
Agricultural use occupies significant proportion in the sludge treatment of developed country, and wastewater treatment in China has life and industry is dirty
The phenomenon that water mixing, harmful substance contents are high, therefore the sludge in China is not suitable for carrying out agricultural use.To burn the place for core
Reason method is the method that current sludge treatment is most thorough, quick and economic, it can make organic matter all be carbonized, can be to the maximum extent
Sludge volume is reduced, while the energy of matter flammable in sludge can be converted into electric energy or thermal energy, turns waste into wealth, obtains sludge
It is utilized to sufficient.Although sludge incineration disposition one-time investment is slightly higher, since it has some other techniques irreplaceable
The advantages of, especially the minimizing of sludge, it is innoxious, economize the land resource and in terms of, become the final outlet of sludge
Solution.
Studies in China mechanism has invented some using sludge anhydration burning as the sludge treatment system of main technological route at present
System and method, achieve considerable effect in " minimizing " of sludge treatment, but " innoxious " and " money for sludge treatment
Source " utilization is abundant not enough.Patent 201721421029.2 discloses " a kind of sludge drying treatment system ", which uses
Cold air heating is that hot wind needs higher energy consumption, vent gas treatment is extremely complex, and energy consumption is equally very as dried medium by hot wind
Height, while increasing cost of investment;Patent 201711094171.5 disclose " a kind of sludge drying coupling coal generating system and
Method ", the system solve the problems, such as vent gas treatment, but useless after sludge drying by coupling with coal-fired power station boiler system
Water need to enter sewage disposal system and handle, and can generate certain energy consumption, recycling degree is inadequate, and the feeding system of dewatered sludge
In have many leakage points, influence of the dewatered sludge foul gas to ambient enviroment is difficult to be controlled.
Summary of the invention
The technical problem that the one side of the disclosure solves is to provide a kind of coal-fired coupling sludge heating system and method,
By by coal-fired steam boiler, steam turbine, water bed desulphurization system and the heat pump system in sludge drying system and heat source
It is coupled, gives full play to the advantage of each system, using lower energy consumption, obtain dewatered sludge, waste water and exhaust gas effective net
Change and utilize, really realizes the innoxious of sludge, minimizing and resource utilization.
To achieve the above object, the present invention adopts the following technical scheme that, a kind of coal-fired coupling sludge heating system of the present invention,
Including sludge pump, centrifugal drier, sludge drying machine, cyclone separator, condenser, water bed desulphurization system, dewatered sludge storehouse, give
Material machine, steam boiler, steam turbine and heat pump system;
Sludge pump is that centrifugal drier conveys wet mud;
Centrifugal drier is dehydrated the wet mud that sludge pump conveys, and dewatered sludge is delivered to sludge drying machine, and waste water is defeated
It send to water bed desulphurization system;
The dewatered sludge desiccation that sludge drying machine conveys centrifugal drier, aqueous, dust-laden exhaust gas are delivered to whirlwind point
From device, dewatered sludge is delivered to dewatered sludge storehouse;
Dewatered sludge storehouse is fed for storing dewatered sludge, and for batcher;
Cyclone separator separates the exhaust gas of conveying, and water-containing waste gas is delivered to condenser, and dust-laden object is transmitted back to sludge drying
Machine;
Condenser condenses water-containing waste gas, and waste water is delivered to water bed desulphurization system, and exhaust gas is delivered to batcher;
Batcher will be delivered to steam boiler with powder air-flow;
Steam boiler is that steam turbine conveys steam;
Steam turbine provides power for the heat pump in heat pump system, and the steam of discharge is delivered to sludge drying machine;
Heat pump system is connected with water bed desulphurization system.
Further, the centrifugal drier, sludge drying machine and batcher can be driven by motor or steam turbine.
The present invention also provides a kind of coal-fired coupling sludge heat supply methods, it is characterised in that: using a kind of coal-fired coupling sludge
Heating system, specifically:
Wet mud is sent into centrifugal drier by sludge pump and carries out mechanical dehydration, and formation dehydration is dirty after removing partial moisture
Mud is re-fed into sludge drying machine and is dried, and sludge drying machine uses steam contact drying, and steam is not contacted with sludge, steam
From steam turbine discharge, dewatered sludge is formed after dry and is sent into dewatered sludge storehouse;
Air enters sludge drying machine formation exhaust gas carrying vapor and dust enters cyclone separator, after inertial separation
Dust is back to sludge drying machine, and exhaust gas carries vapor and enters condenser, then enters batcher after being dehumidified by condenser, does dirt
Mud is carried by exhaust gas through batcher and is sent into steam boiler and coal multifuel combustion;
It is sent into the recirculated water of water bed desulphurization system and heat pump system by the waste water that centrifugal drier and condenser are discharged,
The flue gas that steam boiler burning generates purifies through water bed desulphurization system and is sent into heating system by heat pump system recovery section heat.
Further, blender is added to improve mechanical dehydration efficiency in the centrifugal drier.
Further, the multifuel combustion ratio (heat input ratio) of the dewatered sludge and coal is not higher than 20%.
Further, the moisture (mass fraction) of the dewatered sludge is 20~35%.
Further, the condensed water in the condenser comes from boiler feedwater, recycles the heat in exhaust gas.
Further, in the sludge drying machine temperature of sludge and air less than 180 DEG C.
Further, the pressure head of the air is provided by blower, and blower may be arranged at before sludge drying machine or sludge drying
Machine, cyclone separator, condenser, any position in batcher process.
Further, described to arrange temperature-decreased pressure reducer to guarantee sludge drying machine between steam turbine and sludge drying machine
Inlet steam parameter.
Compared with the prior art, the invention has the following advantages: 1) minimizing, after disposing, sludge residue is only pole
A small amount of ash;2) innoxious, the disposition product of sludge has dewatered sludge, waste water and exhaust gas, and dewatered sludge is formed as fuel through burning
Nontoxic ash, waste water enter water bed desulphurization system and recycle, and exhaust gas forms nontoxic gas after burning;3) it provides
Source, sludge are disposed through anhydration and incineration, have saved land resource, are reduced environmental pollution, and dewatered sludge can save fire coal as fuel
Consumption, and can get disposition subsidy, consider steam cost and power consumption, disposing sludge per ton can get 50~120 yuan of profit, warp
Social benefit of helping is considerable.
Detailed description of the invention
Fig. 1 is overall structure diagram according to one aspect of the disclosure;
In figure: sludge pump (1), centrifugal drier (2), sludge drying machine (3), cyclone separator (4), condenser (5),
Water bed desulphurization system (6), dewatered sludge storehouse (7), batcher (8), steam boiler (9), steam turbine (10) and heat pump system (11).
Specific embodiment
The present invention is further explained below in conjunction with specific embodiment, but the not limitation present invention, is said
Structure, ratio, size depicted in bright book attached drawing etc., only to cooperate the revealed content of specification, for being familiar with this skill
The personage of art understands and reads, and is not intended to limit the invention enforceable qualifications, therefore does not have technical essential meaning,
The modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the effect of present invention can be generated and institute's energy
Under the purpose reached, should all still it fall in the range of disclosed technology contents can cover.Meanwhile in this specification
Cited such as "upper", "lower", "front", "rear", " centre " term are merely convenient to being illustrated for narration, rather than to limit
The enforceable range of the present invention, relativeness are altered or modified, under the content of no substantial changes in technology, when being also considered as this hair
Bright enforceable scope.
Embodiment, as shown in Figure 1, heat supply is public by taking the coal-fired coupling sludge heating system of certain heat supply company proposed adoption as an example
It takes charge of close to sewage treatment plant.The wet mud of 84% moisture is sent directly into centrifugal drier through sludge pump, centrifugal drier by
Motor drag, after centrifugal drier mechanical dehydration, sludge water content 59%, the waste water of removing is discharged into water bed desulphurization system and stirs
Mix pond.The dewatered sludge of 59% moisture is sent into sludge drying machine by sludge pump and is dried, and sludge drying machine is driven by motor, dirty
Mud desiccation machine uses steam contact drying, and steam is not contacted with sludge, avoids sludge pollution steam, and steam is arranged from steam turbine
Vapour, the dewatered sludge that 30% moisture is formed after dry are sent into dewatered sludge storehouse through negative pressure belt feeder.Air is sent into sludge by air blower and is done
Change machine and combustable organic object are mixed to form exhaust gas, carry vapor and dust enters cyclone separator, the dust after inertial separation
It is back to sludge drying machine, exhaust gas carries vapor and enters condenser, and the waste water of condenser condensation is discharged into water bed desulphurization system and stirs
Mix pond.Exhaust gas forms the gas of dry, few ash after condenser dehumidifies, into batcher carry dewatered sludge be sent into steam boiler with
Coal multifuel combustion, batcher are driven by motor.The flue gas that steam boiler burning generates is purified through water bed desulphurization system and by heat pump system
Recovery section heat is sent into heating system.The steam that steam boiler generates is sent into steam turbine acting, and steam turbine drags heat pump.
The multifuel combustion ratio (heat input ratio) of dewatered sludge and coal is 8%.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of coal-fired coupling sludge heating system, it is characterised in that:
Including sludge pump (1), centrifugal drier (2), sludge drying machine (3), cyclone separator (4), condenser (5), water bed
Desulphurization system (6), dewatered sludge storehouse (7), batcher (8), steam boiler (9), steam turbine (10) and heat pump system (11);
Sludge pump (1) is that centrifugal drier (2) convey wet mud;
Centrifugal drier (2) is dehydrated the wet mud that sludge pump (1) conveys, and dewatered sludge is delivered to sludge drying machine (3), gives up
Water is delivered to water bed desulphurization system (6);
The dewatered sludge desiccation that sludge drying machine (3) conveys centrifugal drier (2), aqueous, dust-laden exhaust gas are delivered to whirlwind
Separator (4), dewatered sludge are delivered to dewatered sludge storehouse (7);
Dewatered sludge storehouse (7) is fed for storing dewatered sludge, and for batcher (8);
Cyclone separator (4) separates the exhaust gas of conveying, and water-containing waste gas is delivered to condenser (5), and it is dry that dust-laden object is transmitted back to sludge
Change machine (3);
Condenser (5) condenses water-containing waste gas, and waste water is delivered to water bed desulphurization system (6), and exhaust gas is delivered to batcher (8);
Batcher (8) will be delivered to steam boiler (9) with powder air-flow;
Steam boiler (9) is that steam turbine (10) convey steam;
Steam turbine (10) provides power for the heat pump in heat pump system (11), and the steam of discharge is delivered to sludge drying machine (3);
Heat pump system (11) is connected with water bed desulphurization system (6).
2. a kind of coal-fired coupling sludge heating system according to claim 1, it is characterised in that: the centrifugal drier
(2), sludge drying machine (3) and batcher (8) can be driven by motor or steam turbine.
3. a kind of coal-fired coupling sludge heat supply method, it is characterised in that: using a kind of coal-fired coupling as claimed in claim 1 or 2
Sludge heating system is closed, specifically:
Wet mud is sent into centrifugal drier (2) by sludge pump (1) and carries out mechanical dehydration, and formation dehydration is dirty after removing partial moisture
Mud is re-fed into sludge drying machine (3) and is dried, and sludge drying machine (3) uses steam contact drying, and steam does not connect with sludge
Touching, steam come from steam turbine (10) steam discharge, form dewatered sludge after dry and be sent into dewatered sludge storehouse (7);
Air enters sludge drying machine (3) formation exhaust gas carrying vapor and dust enters cyclone separator (4), through inertial separation
Dust is back to sludge drying machine (3) afterwards, and exhaust gas carries vapor and enters condenser (5), then by entering after condenser (5) dehumidifying
Batcher (8), dewatered sludge are carried by exhaust gas through batcher (8) and are sent into steam boiler (9) and coal multifuel combustion;
Water bed desulphurization system (6) and heat pump system (11) are sent by the waste water that centrifugal drier (2) and condenser (5) are discharged
In recirculated water, the flue gas that steam boiler (9) burning generates is purified through water bed desulphurization system (6) and by heat pump system (11) recoverer
Heat is divided to be sent into heating system.
4. a kind of coal-fired coupling sludge heat supply method according to claim 3, it is characterised in that: the centrifugal drier
(2) blender is added to improve mechanical dehydration efficiency.
5. a kind of coal-fired coupling sludge heat supply method according to claim 3, it is characterised in that: the dewatered sludge and coal
Multifuel combustion ratio (heat input ratio) is not higher than 20%.
6. a kind of coal-fired coupling sludge heat supply method according to claim 3, it is characterised in that: the moisture of the dewatered sludge
(mass fraction) is 20~35%.
7. a kind of coal-fired coupling sludge heat supply method according to claim 3, it is characterised in that: in the condenser (5)
Condensed water come from boiler feedwater, recycle exhaust gas in heat.
8. a kind of coal-fired coupling sludge heat supply method according to claim 3, it is characterised in that: the sludge drying machine
(3) temperature of interior sludge and air is less than 180 DEG C.
9. a kind of coal-fired coupling sludge heat supply method according to claim 3, it is characterised in that: the pressure head of the air by
Blower provide, blower may be arranged at before sludge drying machine (3) or sludge drying machine (3), cyclone separator (4), condenser (5),
Any position in batcher (8) process.
10. a kind of coal-fired coupling sludge heat supply method according to claim 3, it is characterised in that: it is described can be in vapor wheel
Arrange temperature-decreased pressure reducer to guarantee sludge drying machine (3) inlet steam parameter between machine (10) and sludge drying machine (3).
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110748899A (en) * | 2019-11-27 | 2020-02-04 | 中国华能集团清洁能源技术研究院有限公司 | Coal-fired coupled sludge drying incineration system and method considering waste heat utilization |
CN111533425A (en) * | 2020-05-25 | 2020-08-14 | 国惠环保新能源有限公司 | Sludge drying machine exhaust steam treatment system and method |
CN111792816A (en) * | 2020-05-28 | 2020-10-20 | 华能国际电力股份有限公司 | Desulfurizing tower water-saving device and method for recovering sludge drying condensation water |
CN111792815A (en) * | 2020-05-28 | 2020-10-20 | 华能国际电力股份有限公司 | System and method for evaporating sludge drying wastewater by using flue |
CN112443849A (en) * | 2020-11-20 | 2021-03-05 | 安徽国祯生态科技有限公司 | Biomass power plant coupling sludge drying incineration method |
CN112628736A (en) * | 2020-11-30 | 2021-04-09 | 国电常州发电有限公司 | Sludge coupling coal-fired generator set recycling treatment system, process and application |
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WO2008128465A1 (en) * | 2007-04-18 | 2008-10-30 | Shenzhen Eco-Solution Technology Corporation | System and progress for treating wet sludge by drying and incinerating |
CN102730916A (en) * | 2012-06-01 | 2012-10-17 | 南京国能环保工程有限公司 | Treatment process of in-depth dehydration and resource utilization for sludge |
CN108083607A (en) * | 2017-11-08 | 2018-05-29 | 上海锅炉厂有限公司 | A kind of sludge drying coupling coal generating system and method |
CN109111075A (en) * | 2018-08-31 | 2019-01-01 | 上海锅炉厂有限公司 | Sludge drying gasification coupling coal generating system and its process |
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WO2008128465A1 (en) * | 2007-04-18 | 2008-10-30 | Shenzhen Eco-Solution Technology Corporation | System and progress for treating wet sludge by drying and incinerating |
CN102730916A (en) * | 2012-06-01 | 2012-10-17 | 南京国能环保工程有限公司 | Treatment process of in-depth dehydration and resource utilization for sludge |
CN108083607A (en) * | 2017-11-08 | 2018-05-29 | 上海锅炉厂有限公司 | A kind of sludge drying coupling coal generating system and method |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110748899A (en) * | 2019-11-27 | 2020-02-04 | 中国华能集团清洁能源技术研究院有限公司 | Coal-fired coupled sludge drying incineration system and method considering waste heat utilization |
CN111533425A (en) * | 2020-05-25 | 2020-08-14 | 国惠环保新能源有限公司 | Sludge drying machine exhaust steam treatment system and method |
CN111792816A (en) * | 2020-05-28 | 2020-10-20 | 华能国际电力股份有限公司 | Desulfurizing tower water-saving device and method for recovering sludge drying condensation water |
CN111792815A (en) * | 2020-05-28 | 2020-10-20 | 华能国际电力股份有限公司 | System and method for evaporating sludge drying wastewater by using flue |
CN112443849A (en) * | 2020-11-20 | 2021-03-05 | 安徽国祯生态科技有限公司 | Biomass power plant coupling sludge drying incineration method |
CN112628736A (en) * | 2020-11-30 | 2021-04-09 | 国电常州发电有限公司 | Sludge coupling coal-fired generator set recycling treatment system, process and application |
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