CN108439743A - Biogas residue deep dehydration and the method for desiccation after a kind of anaerobic digestion - Google Patents

Biogas residue deep dehydration and the method for desiccation after a kind of anaerobic digestion Download PDF

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Publication number
CN108439743A
CN108439743A CN201810491670.6A CN201810491670A CN108439743A CN 108439743 A CN108439743 A CN 108439743A CN 201810491670 A CN201810491670 A CN 201810491670A CN 108439743 A CN108439743 A CN 108439743A
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CN
China
Prior art keywords
biogas residue
deep dehydration
desiccation
solar energy
dehydration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201810491670.6A
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Chinese (zh)
Inventor
曹波
刘�东
杨晶歆
郭雪青
陈晨
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ZHENJIANG WATER Co
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ZHENJIANG WATER Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZHENJIANG WATER Co filed Critical ZHENJIANG WATER Co
Priority to CN201810491670.6A priority Critical patent/CN108439743A/en
Publication of CN108439743A publication Critical patent/CN108439743A/en
Withdrawn legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/006Electrochemical treatment, e.g. electro-oxidation or electro-osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents

Abstract

The invention belongs to field of environment protection, biogas residue deep dehydration and the method for desiccation after a kind of anaerobic digestion are provided, is included the following steps:a)Pretreatment:The solid content for entering the biogas residue of pyrohydrolysis system is adjusted using excess sludge, solid content is adjusted to 8% or more, and into high-temperature-hot-water solution device, hydrolysis temperature is 150 ~ 170 DEG C, hydrolysis time is 30 40min, and the biogas residue after hydrolysis enters deep dehydration after heat exchange is cooling;b)Deep dehydration:Flocculant PAM is added, moisture content is dropped to 60% or less by 92% using electrolysis drying process;c)Solar energy desiccation:Biogas residue after deep dehydration is entered into solar energy desiccation factory moisture content after solar energy desiccation by screw conveyor and is down to 40% hereinafter, the above percentage is mass percent.The present invention improves the efficiency of biogas residue dehydration, and pretreatment can kill all pathogenic bacteria, be conducive to its recycling, and operating cost is low.

Description

Biogas residue deep dehydration and the method for desiccation after a kind of anaerobic digestion
Technical field
The invention belongs to field of environment protection, it is related to biogas residue deep dehydration and the method for desiccation after a kind of anaerobic digestion.
Background technology
With the increase year by year of sewage disposal total amount, the treating capacity of sludge also increases year by year, and the processing disposition of sludge becomes Major issue urgently to be resolved hurrily.Anaerobic sludge digestion technology become sewage sludge harmlessness, minimizing, recycling effective way it One, and biogas residue is used to the purposes such as afforestation after anaerobic digestion, biogas residue deep dehydration becomes the basis of biogas residue recycling.
Currently, the method for biogas residue deep dehydration includes mainly three kinds:Solar energy desiccation floor space is larger, relies on weather item Part, drying time are long, desiccation it is less efficient;Plate compression needs that the inorganic flocculating agents such as lime, molysite are added after chemical conditioning Change the characteristic of sludge, this method can generate subsequent recycling certain influence;High-voltage pulse electric solution dehydration energy is higher, Dehydration cost is high;Frame dehydration the degree of automation is not high, and dehydration scale is limited.
Invention content
1, technical problem to be solved:
The method of existing biogas residue deep dehydration, too can desiccation take up an area face it is big, rely on weather conditions, high-voltage pulse electric solution be dehydrated energy Consumption is higher, and dehydration cost is high.
2, technical solution:
The present invention is directed to the deficiency of existing biogas residue dewatering, provides biogas residue deep dehydration after a kind of anaerobic digestion and desiccation Method includes the following steps:a)Pretreatment:The solid content for entering the biogas residue of pyrohydrolysis system is adjusted using excess sludge Section, solid content are adjusted to 8% or more, and into high-temperature-hot-water solution device, hydrolysis temperature is 150 ~ 170 DEG C, hydrolysis time 30- 40min, the biogas residue after hydrolysis enter deep dehydration after heat exchange is cooling;b)Deep dehydration:Flocculant PAM is added, using electricity Moisture content is dropped to 60% or less by solution drying process by 92%;c)Solar energy desiccation:Biogas residue after deep dehydration is passed through into spiral transferring It send machine to enter solar energy desiccation factory moisture content after solar energy desiccation and is down to 40% hereinafter, the above percentage is mass percent.
Further, the PAM being added in deep dehydration is the 6/10000-7/10000 of mud dry weight.
3, advantageous effect:
Biogas residue deep dehydration and the method for desiccation are pre-processed by high-temperature-hot-water solution after a kind of anaerobic digestion provided by the invention, The flco and eucaryotic cell structure of biogas residue are destroyed, is released by the moisture of extracellular polymeric absorption and intracellular combination water in biogas residue, more More combination water are converted into Free water, reduce the difficulty of follow-up biogas residue dehydration;The electrolysis entire link of drying process is automatically controlled System, continuous operation, work efficiency is high, and operating cost is low;It will produce 80 DEG C or so of temperature in electrolytic process, biogas residue enters the sun Certain temperature can be carried after desiccation factory, the moisture highly volatile of biogas residue carries out heat tracing without additional auxiliary thermal source, significantly carries The efficiency of solar energy desiccation is risen.
Specific implementation mode
Below by embodiment, the present invention is described in detail.
The present invention provides biogas residue deep dehydration and the method for desiccation after a kind of anaerobic digestion, includes the following steps:a)In advance Processing:The solid content for entering the biogas residue of pyrohydrolysis system is adjusted using excess sludge, solid content is adjusted to 8% or more, enters High-temperature-hot-water solution device, hydrolysis temperature are 150 ~ 170 DEG C, hydrolysis time 30-40min, and the biogas residue after hydrolysis is cold by exchanging heat But enter deep dehydration afterwards;It is pre-processed using high-temperature-hot-water solution technique, is pre-processed by high-temperature-hot-water solution, destroy biogas residue Flco and eucaryotic cell structure are released in biogas residue by the moisture of extracellular polymeric absorption and intracellular combination water, more combine water It is converted into Free water, reduces the difficulty of follow-up biogas residue dehydration.
b)Deep dehydration:Flocculant PAM is added, moisture content is dropped to 60% or less by 92% using electrolysis desiccation; c)The sun It can desiccation:Biogas residue after deep dehydration is entered into solar energy desiccation factory moisture content after solar energy desiccation by screw conveyor 40% is down to hereinafter, the above percentage is mass percent.It will produce 80 DEG C or so of temperature in the electrolysis desiccation of deep dehydration Degree, biogas residue can carry certain temperature after entering solar energy desiccation factory, and the moisture highly volatile of biogas residue is not necessarily to additional auxiliary thermal source Heat tracing is carried out, the efficiency of solar energy desiccation has been obviously improved.
Embodiment 1
Biogas residue deep dehydration and the method for desiccation after a kind of anaerobic digestion, include the following steps:a)Pretreatment:Utilize remaining dirt The solid content of biogas residue for entering pyrohydrolysis system is adjusted in mud, and solid content is adjusted to 8% or more, into high-temperature-hot-water solution device, Hydrolysis temperature is 150 DEG C, hydrolysis time 30min, and the biogas residue after hydrolysis enters deep dehydration after heat exchange is cooling;b)Depth Dehydration:Flocculant PAM is added, moisture content is dropped to 58% using electrolysis drying process;c)Solar energy desiccation:After deep dehydration Biogas residue solar energy desiccation factory moisture content after solar energy desiccation entered by screw conveyor be down to 38%, the above percentage For mass percent.
The PAM being added in deep dehydration is the 7/10000 of mud dry weight.
Embodiment 2
Biogas residue deep dehydration and the method for desiccation after a kind of anaerobic digestion, include the following steps:a)Pretreatment:Utilize remaining dirt The solid content of biogas residue for entering pyrohydrolysis system is adjusted in mud, and solid content is adjusted to 8% or more, into high-temperature-hot-water solution device, Hydrolysis temperature is 170 DEG C, hydrolysis time 40min, and the biogas residue after hydrolysis enters deep dehydration after heat exchange is cooling;b)Depth Dehydration:Flocculant PAM is added, moisture content is dropped to 56% using electrolysis drying process;c)Solar energy desiccation:After deep dehydration Biogas residue solar energy desiccation factory moisture content after solar energy desiccation entered by screw conveyor be down to 36%, the above percentage For mass percent.
The PAM being added in deep dehydration is the 6/10000 of mud dry weight.
Although the present invention has been described by way of example and in terms of the preferred embodiments, they be not it is for the purpose of limiting the invention, it is any ripe This those skilled in the art is practised, without departing from the spirit and scope of the invention, can make various changes or retouch from working as, therefore the guarantor of the present invention Shield range should be subject to what claims hereof protection domain was defined.

Claims (2)

1. biogas residue deep dehydration and the method for desiccation, include the following steps after anaerobic digestion:a)Pretreatment:Utilize excess sludge The solid content of biogas residue to entering pyrohydrolysis system is adjusted, and solid content is adjusted to 8% or more, into high-temperature-hot-water solution device, water It is 150 ~ 170 DEG C, hydrolysis time 30-40min to solve temperature, and the biogas residue after hydrolysis enters deep dehydration after heat exchange is cooling; b)Deep dehydration:Flocculant PAM is added, moisture content is dropped to 60% or less by 92% using electrolysis drying process;c)The sun is competent Change:Biogas residue after deep dehydration is entered solar energy desiccation factory moisture content after solar energy desiccation by screw conveyor to be down to 40% hereinafter, the above percentage is mass percent.
2. the method as described in claim 1, the PAM being added in deep dehydration is the 6/10000-7/10000 of mud dry weight.
CN201810491670.6A 2018-05-22 2018-05-22 Biogas residue deep dehydration and the method for desiccation after a kind of anaerobic digestion Withdrawn CN108439743A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810491670.6A CN108439743A (en) 2018-05-22 2018-05-22 Biogas residue deep dehydration and the method for desiccation after a kind of anaerobic digestion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810491670.6A CN108439743A (en) 2018-05-22 2018-05-22 Biogas residue deep dehydration and the method for desiccation after a kind of anaerobic digestion

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105693063A (en) * 2016-01-26 2016-06-22 江苏省环境科学研究院 Deep dehydration and desiccation method of blue-green algae
CN105693014A (en) * 2016-01-26 2016-06-22 河北中科威德环境工程有限公司 Sewage treatment system and sewage treatment method
CN105800892A (en) * 2016-05-13 2016-07-27 安徽金农惠民生物技术有限公司 Blue-green algae and excess sludge resourceful treatment method
CN105819663A (en) * 2016-05-06 2016-08-03 同济大学 Continuous-deep-dewatering and solar-energy synergy sludge drying method
CN205528260U (en) * 2016-01-26 2016-08-31 河北中科威德环境工程有限公司 Sewage treatment system
CN106964633A (en) * 2017-04-14 2017-07-21 镇江市海润环保科技有限公司 A kind of kitchen castoff and sewage plant sludge cooperative processing method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105693063A (en) * 2016-01-26 2016-06-22 江苏省环境科学研究院 Deep dehydration and desiccation method of blue-green algae
CN105693014A (en) * 2016-01-26 2016-06-22 河北中科威德环境工程有限公司 Sewage treatment system and sewage treatment method
CN205528260U (en) * 2016-01-26 2016-08-31 河北中科威德环境工程有限公司 Sewage treatment system
CN105819663A (en) * 2016-05-06 2016-08-03 同济大学 Continuous-deep-dewatering and solar-energy synergy sludge drying method
CN105800892A (en) * 2016-05-13 2016-07-27 安徽金农惠民生物技术有限公司 Blue-green algae and excess sludge resourceful treatment method
CN106964633A (en) * 2017-04-14 2017-07-21 镇江市海润环保科技有限公司 A kind of kitchen castoff and sewage plant sludge cooperative processing method

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Application publication date: 20180824