CN107285588A - Urban sludge treating method based on hydrothermal carbonization - Google Patents
Urban sludge treating method based on hydrothermal carbonization Download PDFInfo
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- CN107285588A CN107285588A CN201611104585.7A CN201611104585A CN107285588A CN 107285588 A CN107285588 A CN 107285588A CN 201611104585 A CN201611104585 A CN 201611104585A CN 107285588 A CN107285588 A CN 107285588A
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- Prior art keywords
- sludge
- hydrothermal carbonization
- municipal
- treating method
- urban
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Classifications
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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
- C02F11/12—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
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- 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
-
- 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
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/12—Sludge, slurries or mixtures of liquids
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of urban sludge treating method based on hydrothermal carbonization, comprise the following steps, liquid municipal sludge will be contained and be collected into the first sludge storage silo memory storage；Municipal sludge is pumped into sludge heater, sludge is preheated；Municipal sludge is input in hydrothermal carbonization reactor, is first heated at high temperature and carries out low temperature holding again, municipal sludge is carried out hydrothermal carbonization reaction；By reacted sludge, it is dehydrated；Then dewatered sludge particle is made in depth desiccation.The present invention can discharge moisture in municipal sludge, the organic matter in municipal sludge is changed into carbonaceous material to greatest extent simultaneously, handle energy consumption low, qualified discharge after a small amount of industrial waste gas liquid waste processing, with being invested under scale, low, operating cost is low, product surcharge is higher than like product.
Description
Technical field
The present invention relates to a kind of urban sludge treating method, more particularly to a kind of municipal sludge processing based on hydrothermal carbonization
Method.
Background technology
At this stage, China enters High-speed Urbanization period, and sludge yield increases year by year, by by the end of March, 2008, dirty
Mud annual production has reached 26,600,000 tons, increases within 2015 35600000 tons, existing method of disposal mainly include landfill, burn,
Land use and ocean dumping etc., contain a large amount of microorganisms and colloid in sludge, the sludge of nearly half is right without harmlessness disposing
The huge harm of environment structure.Due to the complicated composition and structure composition in sludge, cause the vapour pressure of hydrone, viscosity,
Density etc. shows the property different from pure water, is that the separation of solid and liquid of sludge brings difficulty.
The content of the invention
The present invention provides a kind of urban sludge treating method based on hydrothermal carbonization, can split the cell in municipal sludge
Solution, water release therein is come out, and the organic matter in municipal sludge is changed into carbonaceous material to greatest extent, handles energy consumption
Low, operating cost is low.
In order to solve the above technical problems, the technical scheme is that：A kind of municipal sludge processing based on hydrothermal carbonization
Method, comprises the following steps,
Moisture content is collected into the first sludge storage silo memory storage by step one for 80~85% liquid municipal sludge；
City sludge pump in first sludge storage silo is entered sludge heater by step 2, sludge is preheated, by sludge
Temperature be increased to 90~95 DEG C；
Municipal sludge after preheating is input in hydrothermal carbonization reactor by step 3, is first heated at high temperature, then is carried out
Low temperature is kept, and municipal sludge is carried out hydrothermal carbonization reaction；
Reacted sludge in step 3 is input to mud heat exchanger by step 4 reduces the temperature of sludge, temperature cooling
To 40~70 DEG C；
Sludge after heat exchange is delivered to the second sludge storage silo memory storage by step 5；
Sludge in second sludge storage silo is delivered to sludge dewatering equipment and is dehydrated by step 6, and dehydration to sludge contains
Water rate is 30~35%；
Mud cake is made in dehydrated sludge by step 7；
Mud cake is placed in depth desiccation in incinerator by step 8, and the incineration temperature of incinerator is 600~900 DEG C, during burning
Between be 1~2 hour, dry mud cake is made；
Step 9 is by dry cake crushing into dewatered sludge particle.
As preferred technical scheme, the step 3 is specifically, be passed through vapours, the temperature in hydrothermal carbonization reactor
For 190~320 DEG C, the pressure of reactor is 10~17MPa, and heating 1~2 hour is carried out to the municipal sludge in reactor；So
The temperature in reduction hydrothermal carbonization reactor is to 140~180 DEG C afterwards, and the pressure of reactor is 8~12MPa, to in reactor
Municipal sludge carry out heating 15~20 hours.
As the improvement to above-mentioned technical proposal, when municipal sludge carries out hydrothermal carbonization reaction in the step 3, simultaneously
Municipal sludge is stirred.
As the improvement to above-mentioned technical proposal, in the step 3,20~50 parts of citric acids are added according to mass fraction
Enter into 500~600 parts of municipal sludge, carry out hydrothermal carbonization reaction after stirring again.
As the improvement to above-mentioned technical proposal, the step 6 with high-pressure pump by sludge specifically, be pumped into plate and frame
Sludge dewatering equipment is dehydrated.
As the further improvement to above-mentioned technical proposal, the filtrate that sludge dewatering equipment in the step 6 is discharged conveys
Marsh-gas fermentation tank progress processing fermentation is input into wastewater disposal basin, then by the waste water in wastewater disposal basin, biogas is obtained.
As the further improvement to above-mentioned technical proposal, in the step 7, by mass fraction by 10~20 parts of stone
Ash is doped in 100~150 parts of dehydrated sludge, after being mixed evenly, and mud cake is made.
As the further improvement to above-mentioned technical proposal, in the step 7, by mass fraction by 5~10 parts of soil
In the dehydrated sludge for being doped to 100~150 parts, after being mixed evenly, mud cake is made.
It is 0.5 that as the further improvement to above-mentioned technical proposal, in the step 9, the particle diameter of dewatered sludge particle is small
~1cm.
As the further improvement to above-mentioned technical proposal, the dewatered sludge particle in the step 9 is dispensed.
By adopting the above-described technical solution, the present invention can crack the cell in municipal sludge, by moisture therein
Discharge, separated with solid matter, while the organic matter in municipal sludge is changed into carbonaceous material to greatest extent, produced
The approximate lignite of product calorific value, can be used for biomaterial, building materials utilize, the betterment of land, low, a small amount of Industry Waste of processing energy consumption
Qualified discharge after gas liquid waste processing, with being invested under scale, low, operating cost is low, product surcharge is higher than like product.
Brief description of the drawings
The following drawings is only intended to, in doing schematic illustration and explanation to the present invention, not delimit the scope of the invention.Wherein：
Fig. 1 is the process flow diagram of the embodiment of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the present invention is expanded on further.In the following detailed description, only explanation is passed through
Mode describes some one exemplary embodiments of the present invention.Undoubtedly, one of ordinary skill in the art will recognize,
In the case of without departing from the spirit and scope of the present invention, described embodiment can be repaiied with a variety of modes
Just.Therefore, accompanying drawing and description are inherently illustrative, are not intended to limit the scope of the claims.
As long as in addition, technical characteristic involved in each embodiment of invention described below non-structure each other
It can be just mutually combined into conflict.
As shown in figure 1, a kind of urban sludge treating method based on hydrothermal carbonization, comprises the following steps,
Moisture content is collected into the first sludge storage silo memory storage by step one for 80~85% liquid municipal sludge；
City sludge pump in first sludge storage silo is entered sludge heater by step 2, sludge is preheated, by sludge
Temperature be increased to 90~95 DEG C, be easy in subsequent treatment municipal sludge being brought rapidly up desired value；
Municipal sludge after preheating is input in hydrothermal carbonization reactor by step 3, is first heated at high temperature, then is carried out
Low temperature is kept, and municipal sludge is carried out hydrothermal carbonization reaction；Step 3 can make the microbial cell breakage in sludge, colloid knot
Structure is destroyed, larger molecular organicses dissolution to liquid phase, is then occurred hydrolysis under the conditions of continuous high temperature and is converted into small molecule thing
Matter, so as to reduce the constraint effect of sewage sludge solid, reduces bound water content, so as to separate out as Free water, greatly improves dirt
The dewatering of mud.
Reacted sludge in step 3 is input to mud heat exchanger by step 4 reduces the temperature of sludge, temperature cooling
To 40~70 DEG C；
Sludge after heat exchange is delivered to the second sludge storage silo memory storage by step 5；
Sludge in second sludge storage silo is delivered to sludge dewatering equipment and is dehydrated by step 6, and dehydration to sludge contains
Water rate is 30~35%；
Mud cake is made in dehydrated sludge by step 7；
Mud cake is placed in depth desiccation in incinerator by step 8, and the incineration temperature of incinerator is 600~900 DEG C, during burning
Between be 1~2 hour, dry mud cake is made；
Dewatered sludge particle into dewatered sludge particle, can be used for biomaterial, building materials by dry cake crushing by step 9
Utilize, the betterment of land.
The step 3 is specifically, be passed through vapours, and the temperature in hydrothermal carbonization reactor is 190~320 DEG C, reactor
Pressure be 10~17MPa, in reactor municipal sludge carry out heating 1~2 hour；Then hydrothermal carbonization reactor is reduced
Interior temperature is to 140~180 DEG C, and the pressure of reactor is 8~12MPa, to carrying out heating 15 to the municipal sludge in reactor
~20 hours, above-mentioned steps were conducive to the hydrothermal carbonization of municipal sludge.
When municipal sludge carries out hydrothermal carbonization reaction in the step 3, while being stirred to municipal sludge, above-mentioned control
It is formed with and is passed to beneficial to heat energy, makes municipal sludge hydrothermal carbonization uniform.
In the step 3,20~50 parts of citric acids are added to 500~600 parts of municipal sludge according to mass fraction
In, hydrothermal carbonization reaction is carried out after stirring again, citric acid is conducive to the hydrothermal carbonization of municipal sludge.
The step 6 is dehydrated specifically, sludge is pumped into plate and frame sludge dewatering equipment with high-pressure pump, above-mentioned control
System substantially increases dewatering rate.
The filtrate that sludge dewatering equipment in the step 6 is discharged is delivered in wastewater disposal basin, then the waste water in wastewater disposal basin is defeated
Enter to marsh-gas fermentation tank and carry out processing fermentation, obtain biogas.Above-mentioned control can be effectively treated to filtrate, be conducive to waste water
Recycling.
In the step 7,10~20 parts of lime is doped to 100~150 parts of dehydrated sludge by mass fraction
In, after being mixed evenly, mud cake is made, adding lime can make sludge further solidify and be dehydrated, but also with sterilization
Effect.
In the dehydrated sludge that 5~10 parts of soil is doped to 100~150 parts by mass fraction, it is mixed evenly
Afterwards, mud cake is made, by above-mentioned processing, then depth desiccation is carried out, the dewatered sludge particle for being adapted to produce is used as the biological heap of production
Fertilizer, as Fertilizer application, is conducive to the betterment of land.
It is 0.5~1cm that the particle diameter of dewatered sludge particle is small in the step 9, and above-mentioned processing is easy to use, dispenses and stored.
By the dewatered sludge particle packing in the step 9, above-mentioned processing is easy to store and transported.
The present embodiment can crack the cell in municipal sludge, and water release therein is come out, with solid matter point
From while the organic matter in municipal sludge is changed into carbonaceous material to greatest extent, the approximate lignite of product calorific value produced can
For biomaterial, building materials utilization, the betterment of land, processing energy consumption is low, qualified discharge after a small amount of industrial waste gas liquid waste processing,
With being invested under scale, low, operating cost is low, product surcharge is higher than like product.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of urban sludge treating method based on hydrothermal carbonization, it is characterised in that comprise the following steps,
Moisture content is collected into the first sludge storage silo memory storage by step one for 80~85% liquid municipal sludge；
City sludge pump in first sludge storage silo is entered sludge heater by step 2, sludge is preheated, by the temperature of sludge
Degree is increased to 90~95 DEG C；
Municipal sludge after preheating is input in hydrothermal carbonization reactor by step 3, is first heated at high temperature, then carries out low temperature
Keep, municipal sludge is carried out hydrothermal carbonization reaction；
Reacted sludge in step 3 is input to mud heat exchanger by step 4 reduces the temperature of sludge, and temperature is cooled to 40
~70 DEG C；
Sludge after heat exchange is delivered to the second sludge storage silo memory storage by step 5；
Sludge in second sludge storage silo is delivered to sludge dewatering equipment and is dehydrated by step 6, dehydration to moisture percentage in sewage sludge
For 30~35%；
Mud cake is made in dehydrated sludge by step 7；
Mud cake is placed in depth desiccation in incinerator by step 8, and the incineration temperature of incinerator is 600~900 DEG C, and the burning time is
1~2 hour, dry mud cake is made；
Step 9 is by dry cake crushing into dewatered sludge particle.
2. the urban sludge treating method as claimed in claim 1 based on hydrothermal carbonization, it is characterised in that：The step 3 tool
Body is to be passed through vapours, and the temperature in hydrothermal carbonization reactor is 190~320 DEG C, and the pressure of reactor is 10~17MPa, right
Municipal sludge in reactor carries out heating 1~2 hour；Then the temperature in reduction hydrothermal carbonization reactor is to 140~180
DEG C, the pressure of reactor is 8~12MPa, to carrying out heating 15~20 hours to the municipal sludge in reactor.
3. the urban sludge treating method as claimed in claim 1 based on hydrothermal carbonization, it is characterised in that：In the step 3
When municipal sludge carries out hydrothermal carbonization reaction, while being stirred to municipal sludge.
4. the urban sludge treating method as claimed in claim 1 based on hydrothermal carbonization, it is characterised in that：The step 3
In, 20~50 parts of citric acids are added in 500~600 parts of municipal sludge according to mass fraction, carried out again after stirring
Hydrothermal carbonization reacts.
5. the urban sludge treating method as claimed in claim 1 based on hydrothermal carbonization, it is characterised in that：The step 6 tool
Body is that sludge is pumped into plate and frame sludge dewatering equipment with high-pressure pump is dehydrated.
6. the urban sludge treating method as claimed in claim 1 based on hydrothermal carbonization, it is characterised in that：By the step 6
The filtrate of middle sludge dewatering equipment discharge is delivered in wastewater disposal basin, then the waste water in wastewater disposal basin is input at marsh-gas fermentation tank
Haircut ferment, obtains biogas.
7. the urban sludge treating method as claimed in claim 1 based on hydrothermal carbonization, it is characterised in that：The step 7
In, in the dehydrated sludge that 10~20 parts of lime is doped to 100~150 parts by mass fraction, after being mixed evenly, system
Obtain mud cake.
8. the urban sludge treating method as claimed in claim 1 based on hydrothermal carbonization, it is characterised in that：The step 7
In, in the dehydrated sludge that 5~10 parts of soil is doped to 100~150 parts by mass fraction, after being mixed evenly, system
Obtain mud cake.
9. the urban sludge treating method as claimed in claim 1 based on hydrothermal carbonization, it is characterised in that：In the step 9
The small particle diameter of dewatered sludge particle is 0.5~1cm.
10. the urban sludge treating method based on hydrothermal carbonization as described in any one of claim 1 to 9, it is characterised in that：Will
Dewatered sludge particle packing in the step 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611104585.7A CN107285588A (en) | 2016-12-05 | 2016-12-05 | Urban sludge treating method based on hydrothermal carbonization |
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| CN201611104585.7A CN107285588A (en) | 2016-12-05 | 2016-12-05 | Urban sludge treating method based on hydrothermal carbonization |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109020133A (en) * | 2018-09-04 | 2018-12-18 | 天津百利机械装备集团有限公司中央研究院 | A kind of sludge at low temperature carbonization system and process |
| CN109574465A (en) * | 2019-01-20 | 2019-04-05 | 重庆大学 | A method of it is carbonized based on low-temperature hydrothermal and supplements sewage treatment plant's carbon source |
| CN112607996A (en) * | 2020-12-16 | 2021-04-06 | 北京城市排水集团有限责任公司 | Thermal hydrolysis advanced anaerobic digestion and pyrolysis carbonization coupling process |
| CN113185071A (en) * | 2021-04-07 | 2021-07-30 | 西安交通大学 | Sludge treatment system and method with catalysis and pyrohydrolysis assisted hydrothermal carbonization |
| US12006271B2 (en) | 2020-04-20 | 2024-06-11 | Tongji University | Method for sludge dewatering using kitchen waste to synergistically enhance anaerobic biological acidification and low-temperature thermal hydrolysis of excess sludge |
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| EP2612842A1 (en) * | 2012-01-05 | 2013-07-10 | CSL Carbon Solutions Ltd | Apparatus for heating biomass sludge |
| CN103755124A (en) * | 2014-01-23 | 2014-04-30 | 杭州互惠环保科技有限公司 | Sludge treatment method based on hydrothermal carbonization |
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| CN1631821A (en) * | 2004-12-17 | 2005-06-29 | 清华大学 | Urban sludge treatment method |
| EP2414494A1 (en) * | 2009-04-01 | 2012-02-08 | SunCoal Industries GmbH | Method for hydrothermally carbonizing renewable raw materials and organic residual products |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109020133A (en) * | 2018-09-04 | 2018-12-18 | 天津百利机械装备集团有限公司中央研究院 | A kind of sludge at low temperature carbonization system and process |
| CN109574465A (en) * | 2019-01-20 | 2019-04-05 | 重庆大学 | A method of it is carbonized based on low-temperature hydrothermal and supplements sewage treatment plant's carbon source |
| US12006271B2 (en) | 2020-04-20 | 2024-06-11 | Tongji University | Method for sludge dewatering using kitchen waste to synergistically enhance anaerobic biological acidification and low-temperature thermal hydrolysis of excess sludge |
| CN112607996A (en) * | 2020-12-16 | 2021-04-06 | 北京城市排水集团有限责任公司 | Thermal hydrolysis advanced anaerobic digestion and pyrolysis carbonization coupling process |
| CN113185071A (en) * | 2021-04-07 | 2021-07-30 | 西安交通大学 | Sludge treatment system and method with catalysis and pyrohydrolysis assisted hydrothermal carbonization |
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