CN110304804A - A kind of sludge hot is quenched and desiccation is carbonized energy conserving system - Google Patents
A kind of sludge hot is quenched and desiccation is carbonized energy conserving system Download PDFInfo
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- CN110304804A CN110304804A CN201910431561.XA CN201910431561A CN110304804A CN 110304804 A CN110304804 A CN 110304804A CN 201910431561 A CN201910431561 A CN 201910431561A CN 110304804 A CN110304804 A CN 110304804A
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- sludge
- gas
- heat
- unit
- quenched
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- 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
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- 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
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
A kind of sludge hot is quenched and desiccation is carbonized energy conserving system, including high temperature gas source unit, sludge heat drying unit, sludge carbonation unit, gas purification units, increases steam turbine unit；High temperature gas source unit piping connection sludge carbonation unit provides high temperature heating gas and is used for sludge carbonization treatment, and the carbonizing gas in sludge carbonisation and the flue gas after heat exchange are discharged together；Increase steam turbine cell operation gas access and connect high temperature gas source unit, intake-gas entrance connects sludge carbonation unit, the gas that when injection sludge carbonization treatment generates, gas recovery waste heat；Increase the mixing final vacuum of steam turbine unit and access sludge heat drying unit, provides high temperature heating gas for the preliminary heat drying of sludge；The heat consumption of system, power consumption decline to a great extent, and the waste heat of flue gas is recycled after heat exchanging, reduce drying sludge energy consumption and cost.
Description
Technical field
The invention belongs to water treatment field, it is related to that a kind of sludge hot is quenched and desiccation carbonization energy conserving system.
Background technique
The principle of China's Treatment of Sludge and requirement are to realize " minimizing, stabilisation, innoxious and recycling ".By sewage
The mechanical dewatered sludge of factory's concentration, 80% or so, but at this time, moisture content is shifted and is handled for subsequent transport moisture content
Still higher for disposition, sludge volume and weight are still very big, and for burning, the moisture percentage in sewage sludge of compost is required to be lower than
60% or so, moisture percentage in sewage sludge at this time does not obviously reach requirement also.Sludge drying can make moisture percentage in sewage sludge drop to 30%~
50%, and surplus materials is more stable after desiccation, foul smell and causal organism are greatly removed, and reduce sludge volume
4~5 times, while its calorific value and nutrition are retained.Therefore, sludge drying is premise and the pass of specific resistance to filtration technology
Where key.
Sludge heat drying technology is the most important sludge drying technique modernized at present, and main operational principle is to pass through
External heat source carries out heat exchange by heat exchanger shell, evaporates sludge using the thermal energy of flue gas, water vapour or industrial exhaust heat
In moisture be allowed to desiccation.
Sludge carbonization be a kind of novel sludge disposal technology, not only can successfully realize sludge minimizing, it is innoxious and
Recycling, while effectively fixed carbon source, and generate carbon-based product and can carry out resource utilization, efficiently solving sludge organism can benefit
With the problem of property difference, it has also become current domestic and international research hotspot.It is (cracking process) and wet that sludge carbonization method can be divided into dry method carbonization
Method is carbonized (hydrothermal carbonization).No matter which kind of method is used, and sludge is required to consume a large amount of thermal energy, electric energy, system operation when being carbonized
Energy-saving problem need to solve.
Summary of the invention
The purpose of the present invention is to provide a kind of sludge heat drying and the energy conserving system of carbonization, can meet desiccation and
While carbonized product performance requirement, the heat consumption of system, power consumption is made to decline to a great extent, to realize energy saving of system.
A kind of sludge hot is quenched and desiccation is carbonized energy conserving system, including high temperature gas source unit, sludge heat drying unit,
Sludge carbonation unit, increases steam turbine unit at gas purification units；It is characterized in that, water-containing sludge sequence passes through sludge heat drying list
Member and sludge carbonation unit carry out heat drying and carbonization treatment；High temperature gas source unit piping connection sludge carbonation unit, provides height
Warm heat gas is used for sludge carbonization treatment, and the carbonizing gas in sludge carbonisation and the flue gas after heat exchange are discharged together；Increase
Steam turbine cell operation gas access connects high temperature gas source unit, and intake-gas entrance connects sludge carbonation unit, injection sludge carbon
Change the gas generated when processing, gas recovery waste heat；Increase the mixing final vacuum of steam turbine unit and access sludge heat drying unit, height is provided
Warm heat gas is used for the preliminary heat drying of sludge；Sludge heat drying unit discharge gas to gas purification units purify quenched
Processing.
Compared with prior art, the beneficial effects of the present invention are:
1, setting increases steam turbine (gas-gas formula) in system, provides power of the high-temperature flue gas in desiccation, purification process.System
It unites no Fan Equipment, reduces power consumption.
2, the water after sludge drying carries out condensing recovery.
3, the thermal cycle subsystem of air is set, the waste heat of flue gas after desiccation condensed water and carbonization heat exchange is recycled,
Realize three-level step heat temperature raising.
4, to the purification system of flue gas setting dedusting, demisting after desiccation.
5, the integral system of sludge drying and carbonization.
6, it using the fume afterheat of desiccation, as the heat source of the quenched reactor of heat, realizes and the quenched dehydration process of heat
Coupling and synthesis energy saving.
Detailed description of the invention
Fig. 1 is that sludge hot is quenched and the energy conserving system schematic diagram of desiccation carbonization；
Wherein, 1-boiler；2-belt-type drying machines；3-carbide furnaces；4-coolers；5-primary cyclones；6—
Secondary cyclone；7-demisters；The quenched reactor of 8-sludge hots；9-sedimentation basins；10-filters；11-low temperature change
Hot device；12-carbonization storage bins；13-surrounding airs；14-sludge storage bins；15-increase steam turbine；16-rectifiers；17-transmission
Belt；18-belt-type drying machine sludge inlets；19-high-temperature heat-exchangings.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings, it should be understood that content described herein is merely to illustrate
It is of the invention with explaining, it is not intended to limit the present invention.
Technical solution of the present invention is not limited by water treatment plant's property.
Technical solution of the present invention is not limited by mud ingredient and water content.
Technical solution of the present invention is not limited by sludge treatment amount.
A kind of sludge hot is quenched and desiccation is carbonized energy conserving system, including high temperature gas source unit, sludge heat drying unit,
Sludge carbonation unit, increases steam turbine unit at gas purification units；It is characterized in that, water-containing sludge sequence passes through sludge heat drying list
Member and sludge carbonation unit carry out heat drying and carbonization treatment；High temperature gas source unit piping connection sludge carbonation unit, provides height
Warm heat gas is used for sludge carbonization treatment, and the carbonizing gas in sludge carbonisation and the flue gas after heat exchange are discharged together；Increase
Steam turbine cell operation gas access connects high temperature gas source unit, when intake-gas entrance injection sludge carbonization treatment generated gas
Body, gas recovery waste heat；Increase the mixing final vacuum of steam turbine unit and access sludge heat drying unit, high temperature heating gas is provided and is used for dirt
The preliminary heat drying of mud；Sludge heat drying unit discharge gas to gas purification units carry out purification modifier treatment.Sludge carbonization is single
First gas output tube is connected to high-temperature heat-exchanging, as high temperature heat source, exports low-temperature flue gas after high-temperature heat-exchanging heat release cooling
Into increasing steam turbine unit intake-gas entrance.Sludge enters sludge cooling unit and is cooled down after the discharge carbonization of sludge carbonation unit
It handles, delivers into carbonization storage bin after cooling treatment.
To enter high temperature gas source unit combustion-supporting by three-level pre-heating temperature elevation for cold air；It is introduced into cryogenic heat exchanger, low-temperature heat exchange
Device connects sedimentation basin, and using the hot water in sedimentation basin as heat source, air is carried out level-one preheating by heat exchanger；By heat exchange
After device tentatively preheats, it is used to cool down the high temperature sludge after carburizing reagent into sludge cooling unit, air carries out second level preheating；It is dirty
The discharge gas of mud cooling unit is connected to high-temperature heat-exchanging, in high-temperature heat-exchanging with the high temperature cigarette from sludge carbonation unit
Gas exchanges heat, and carries out three-level preheating.
Clean unit includes cyclone separator, demister, the quenched reactor of sludge hot and sedimentation basin；Sludge heat drying unit
Steam, the flue gas sequential flow of middle generation cross the quenched reactor of cyclone separator, demister, sludge hot, and separation removal is therein solid
Phase, liquid phase composition, input sedimentation basin by pipeline.Cyclone separator includes two-stage, primary cyclone and second level whirlwind point
From device；It is precipitated in sedimentation basin by dosing, separation forms supernatant liquid and lower sediment thing.
Embodiment:
As shown in Figure 1, storing water-containing sludge in sludge storage bin 14, belt-type drying machine 2 is connected to by sludge carrier pipe.
Belt-type drying machine 2 is internally provided with feed belt 17, and top is equipped with several rectifiers 16, the High Temperature Gas of 16 pairs of rectifier inputs
Stream rectify uniformly distributed.
Sludge in sludge storage bin 14 delivers into belt-type drying machine 2, evenly laid out on feed belt 17, belt-type drying
Machine entrance is equipped with rotatable baffle, and the tiling thickness of sludge is controlled by adjusting baffle opening.By adjusting belt-type drying
The variable-frequency motor of machine 2 changes 17 speed of service of feed belt, controls the heat drying time of sludge.
Sludge in belt-type drying machine 2 is by heating and drying from the high-temperature flue gas that steam turbine 15 is discharged is increased.High-temperature flue gas passes through
The rectifier that 2 top of belt-type drying machine is arranged in, which enters, to be evenly distributed with, to guarantee the uniform of 17 top Flow and heat flux of feed belt.
After being laid in the water-containing sludge on feed belt 17 and high-temperature flue gas contact heat-exchanging, moisture is heated evaporation, and desiccation is dewatered
Sludge continues to deliver into upstream device carbide furnace 3.
The gas output tube of belt-type drying machine 2 be connected to purification system be dusted, demisting, deodorizing process.Purification system
Including two stage cyclone separator, demister, the quenched reactor of sludge hot and sedimentation basin.Steam, the flue gas generated in drying process
Sequence flows through the quenched reactor of two stage cyclone separator, demister, sludge hot, and separation removal solid phase therein, liquid phase composition are led to
Cross pipeline input sedimentation basin.
Firstly, the steam that desiccation generates is together with the flue gas after heat exchange cooling, the channel along 2 bottom of belt-type drying machine is flowed
Out, into primary cyclone 5 and secondary cyclone 6.In cyclone separator 5 and 6, the solid that is carried in flue gas
Grain object is captured, while some vapor drop collides during eddy flow with solid wall surface, and size droplet diameter constantly condenses increasing
It is exported together with solid particulate matter greatly and enters sedimentation basin 9.Solid particulate matter is precipitated in sedimentation basin 9 by dosing, is separated into
Layer liquid and lower layer's solid.
After two stage cyclone separator, the steam of non-total condensation is together with flue gas from 6 top of secondary cyclone
Exhaust pipe condense the steam in flue gas further into demister 7.Condensed water output enters sedimentation basin 9.
Flue gas after removal solid phase, liquid phase composition is discharged into the quenched reactor 8 of sludge hot from demister 7, carries out deodorizing process, wherein
Heat source using the fume afterheat after desiccation, as the quenched reactor of heat.
The dewatered sludge of desiccation enters progress dry method carbonization treatment in upstream device carbide furnace 3.
The high-temperature flue gas generated by boiler 1, into carbide furnace 3, heating by belt-type drying machine 2 convey Lai dewatered sludge,
Dewatered sludge thermally decomposes under hypoxia.Flue gas after generated carbonizing gas and heat exchange is discharged from carbide furnace 3 together, into
Enter high-temperature heat-exchanging 19, as high temperature heat source, exports low-temperature flue gas after heat exchanger heat release cooling.
Increase steam turbine 15 and use gas-gas type jet type heat pump, working gas entrance connects high-temperature flue gas pipe, accesses boiler 1
The high-temperature flue gas of generation, intake-gas entrance connect the low-temperature flue gas pipe of high-temperature heat-exchanging, and access high-temperature heat-exchanging 19 is discharged
Low-temperature flue gas.
The high-temperature flue gas that boiler 1 generates is the working gas for increasing steam turbine 15, the flue gas that injection heat exchanger 19 is discharged.
Increase 15 exhaust outlet piping connection belt-type drying machine 2 of steam turbine.
Increase the mixed flue gas of steam turbine 15, output enters belt-type drying machine 2, for preliminary heating and drying sludge.
Sludge after carburizing reagent is discharged into upstream device cooler 4 through carbide furnace 3 and carries out cooling treatment, cooling treatment
After deliver into carbonization storage bin 12.
Outside ambient air enters boiler 1 by air delivery pipe, and three-level pre-heating temperature elevation is passed through before entering boiler.
Outside ambient air is first passed through cryogenic heat exchanger 11, and cryogenic heat exchanger 11 connects sedimentation basin 9, benefit by circulating water pipe
It uses the hot water of 9 top layer of sedimentation basin as heat source, is preheated air 13 by cryogenic heat exchanger 11.Cryogenic heat exchanger 11 uses
Water-gas heat exchanger form.
Cryogenic heat exchanger 11 is equipped with filter 10 in hot water inlet's pipe side, filters the impurity composition carried in hot water, avoids
Deposition blocking occurs in heat exchanger tube.
Air 13 is used to cool down the high temperature after carburizing reagent after cryogenic heat exchanger 11 tentatively preheating, into cooler 4
Sludge, air are further increased through reheating, temperature.
The discharge gas of cooler 4 is connected to high-temperature heat-exchanging 19, in high-temperature heat-exchanging 19 with the height from carbide furnace 3
Warm flue gas exchanges heat, and is heated three times, and the temperature of air further increases.High-temperature heat-exchanging 11 uses gas-to-gas heat exchanger shape
Formula.
It is combustion-supporting to enter boiler 1 by the hot-air of three-level pre-heating temperature elevation.
Increase steam turbine and be not limited to one, the form of plural serial stage can also be used, using high-temperature flue gas as working gas, the
The exhaust that level-one increases steam turbine outlet increases the low-pressure gas source of vapour grade as the second level, makes the pressure and temperature of exiting exhaust gas in ladder liter
It is high.Increase steam turbine or secondary increasing steam turbine by more increasing steam turbine parallel runnings in addition, can need to be arranged according to operating condition as chopped-off head.
Finally, it should be noted that being not intended to restrict the invention the foregoing is merely explanation of the invention, although to this hair
It is bright to be described in detail, it for those skilled in the art, still can be to aforementioned documented technical solution
It modifies or equivalent replacement of some of the technical features.All within the spirits and principles of the present invention, made
Any modification, equivalent substitution, improvement and etc. should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of sludge hot is quenched and desiccation is carbonized energy conserving system, including high temperature gas source unit, sludge heat drying unit, dirt
Mud carbonation unit, increases steam turbine unit at gas purification units；It is characterized in that, water-containing sludge sequence passes through sludge heat drying unit
And sludge carbonation unit carries out heat drying and carbonization treatment；High temperature gas source unit piping connection sludge carbonation unit, provides high temperature
Heat gas is used for sludge carbonization treatment, and the carbonizing gas in sludge carbonisation and the flue gas after heat exchange are discharged together；Increase vapour
Machine cell operation gas access connects high temperature gas source unit, and intake-gas entrance connects sludge carbonation unit, the carbonization of injection sludge
The gas generated when processing, gas recovery waste heat；Increase the mixing final vacuum of steam turbine unit and access sludge heat drying unit, high temperature is provided
Heat gas is used for the preliminary heat drying of sludge；Sludge heat drying unit discharge gas carries out purifying quenched place to gas purification units
Reason.
2. a kind of sludge hot according to claim 1 is quenched and desiccation is carbonized energy conserving system, which is characterized in that clean unit
Including cyclone separator, demister, the quenched reactor of sludge hot and sedimentation basin；Steam, the cigarette generated in sludge heat drying unit
Gas sequential flow crosses the quenched reactor of cyclone separator, demister, sludge hot, and separation removal solid phase therein, liquid phase composition pass through
Pipeline inputs sedimentation basin.
3. a kind of sludge hot according to claim 2 is quenched and desiccation is carbonized energy conserving system, which is characterized in that further include dirt
Mud cooling unit, sludge enters sludge cooling unit and carries out cooling treatment after the discharge carbonization of sludge carbonation unit, after cooling treatment
Deliver into carbonization storage bin.
4. a kind of sludge hot according to claim 2 is quenched and desiccation is carbonized energy conserving system, which is characterized in that cyclonic separation
Device includes two-stage, primary cyclone and secondary cyclone；It is precipitated in sedimentation basin by dosing, separation forms upper liquid
Body and lower sediment thing.
5. a kind of sludge hot according to claim 3 is quenched and desiccation is carbonized energy conserving system, which is characterized in that sludge carbonization
Unitary gas efferent duct is connected to high-temperature heat-exchanging, as high temperature heat source, exports low temperature cigarette after high-temperature heat-exchanging heat release cooling
Gas, which enters, increases steam turbine unit intake-gas entrance.
6. a kind of sludge hot according to claim 5 is quenched and desiccation is carbonized energy conserving system, which is characterized in that cold air warp
Crossing three-level pre-heating temperature elevation, to enter high temperature gas source unit combustion-supporting；It is introduced into cryogenic heat exchanger, cryogenic heat exchanger connects sedimentation basin, utilizes
Air is carried out level-one preheating by cryogenic heat exchanger as heat source by the hot water in sedimentation basin；It is tentatively pre- by cryogenic heat exchanger
After heat, it is used to cool down the high temperature sludge after carburizing reagent into sludge cooling unit, carries out second level preheating；Sludge cooling unit
Discharge gas is connected to high-temperature heat-exchanging, exchanges heat in high-temperature heat-exchanging with the high-temperature flue gas from sludge carbonation unit,
Carry out three-level preheating.
7. a kind of sludge hot according to claim 6 is quenched and desiccation is carbonized energy conserving system, which is characterized in that low-temperature heat exchange
Device uses water-gas heat exchanger form, and high-temperature heat-exchanging uses gas-to-gas heat exchanger form.
8. a kind of sludge hot according to claim 1 is quenched and desiccation is carbonized energy conserving system, which is characterized in that increase steam turbine list
Member uses gas-gas type jet type heat pump.
9. a kind of sludge hot according to claim 8 is quenched and desiccation is carbonized energy conserving system, which is characterized in that more of setting
Increase steam turbine, using the form of plural serial stage, using high-temperature flue gas as working gas, the first order increases the exhaust conduct of steam turbine outlet
The second level increases the low-pressure gas source of vapour grade, increases the pressure and temperature of exiting exhaust gas in ladder.
10. a kind of sludge hot according to claim 9 is quenched and desiccation is carbonized energy conserving system, which is characterized in that setting by
More increasing steam turbine parallel runnings increase steam turbine or secondary increasing steam turbine as chopped-off head.
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| CN201910118706 | 2019-02-18 | ||
| CN2019101187060 | 2019-02-18 |
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| CN110304804B CN110304804B (en) | 2022-11-25 |
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Cited By (1)
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| CN117023940A (en) * | 2023-10-08 | 2023-11-10 | 国能龙源环保有限公司 | Sludge drying system and sludge drying method |
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| CN110304804B (en) | 2022-11-25 |
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