CN108002672A - A kind of method handled using pyrohydrolysis pretreating process biochemical sludge - Google Patents
A kind of method handled using pyrohydrolysis pretreating process biochemical sludge Download PDFInfo
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- CN108002672A CN108002672A CN201610963488.7A CN201610963488A CN108002672A CN 108002672 A CN108002672 A CN 108002672A CN 201610963488 A CN201610963488 A CN 201610963488A CN 108002672 A CN108002672 A CN 108002672A
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- sludge
- biochemical sludge
- pyrohydrolysis
- biochemical
- pretreating process
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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
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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
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/44—Time
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of method handled using pyrohydrolysis pretreating process biochemical sludge.This method comprises the following steps that：(1) biochemical sludge is diluted with water so that the solid content of biochemical sludge is between 5 15%；(2) biochemical sludge for obtaining step (1) carries out pyrohydrolysis, and after reaction, hair is so cooled to room temperature；(3) biochemical sludge that step (2) obtains is nursed one's health；(4) the biochemical sludge plate and frame filter press press filtration for obtaining step (3), obtains dehydrated sludge.The beneficial effects of the present invention are：This method is simple, and pretreated sewage sludge viscosity reduces, and mobility enhancing, is conducive to the post processing of biochemical sludge.
Description
Technical field
The invention belongs to technical field of sludge treatment, specifically, is related to one kind using pyrohydrolysis pretreating process to life
Change the method that sludge is handled.
Background technology
Concentration, centrifugation or plate compression dehydration are substantially taken biochemical sludge in industry at present, coal dust steam power plant is mixed and burns
The processing mode of commission disposal is burnt or sends outside, treatment effeciency is low, still there is 70%~80% moisture content after dehydration, and decrement is limited,
Organic matter does not obtain finally stablizing disposal.The high sludge of moisture content mixes coal dust burning, and there is also many drawbacks, energy utilization rate
It is low, technical, economically uneconomical
Part of contaminated water factory takes biochemical sludge Anaerobic Digestion technology, there is also operational management difficulty is big, gas production
Small the problems such as being difficult to realize utilize.
The content of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to provide one kind to use pyrohydrolysis pretreating process pair
The method that biochemical sludge is handled.The pretreating process of the present invention is simple, and pretreated sewage sludge viscosity reduces, and mobility increases
By force, the post processing of biochemical sludge is conducive to.
Technical solution of the present invention is specifically described as follows.
The present invention provides a kind of method handled using pyrohydrolysis pretreating process biochemical sludge, and specific steps are such as
Under：
(1) biochemical sludge is diluted with water so that the solid content of biochemical sludge is between 5-15%；
(2) biochemical sludge for obtaining step (1) carries out pyrohydrolysis, and after reaction, hair is so cooled to room temperature.
(3) step (2) is obtained biochemical sludge to be nursed one's health using mix reagent, mix reagent is made of A and B, A tri-
Iron chloride or bodied ferric sulfate, B is lime or polyacrylamide PAM, using dosing as medicament dry weight and the ratio of mud dry weight
Value meter, A is that 8%~15%, B is 2%~20%；
(4) the biochemical sludge plate and frame filter press press filtration for obtaining step (3), obtains dehydrated sludge.
In above-mentioned steps (1), the biochemical sludge that is diluted with water passes through dehydration by the biochemical sludge of biochemical sewage processing pond
Obtained after reason.
In above-mentioned steps (1), the solid content of biochemical sludge is between 10-13%.
In above-mentioned steps (2), pyrohydrolysis temperature is 140-200 DEG C.Preferably, pyrohydrolysis temperature is 160-180 DEG C.
In above-mentioned steps (2), the pyrohydrolysis time is 20-90min.Preferably, the pyrohydrolysis time is 30-50min.
In above-mentioned steps (3), mix reagent is ferric trichloride and the mixture of lime.
The pyrohydrolysis preconditioning technique of the present invention, technique is simple, it is by the way that sludge is heated, under certain temperature and pressure
Make the sticky hydrolysis of organic matter in sludge, destroy the colloform texture of sludge, dewatering and anaerobic digestion can be improved at the same time
Energy.With the increase of hydrothermal temperature and pressure, particles collision increase is intergranular to collide the destruction that result in colloform texture,
Separate irreducible water and solid particle.In addition, heating makes the breaks down proteins in sludge, cell ruptures, the moisture of intracellular
It is released, strengthens biodegradability energy, improves mobile performance.The sludge handled by pyrohydrolysis is not in the case where adding flocculant
The moisture content of mechanical dehydration is greatly lowered.The hydrolysis of sludge macroscopically show as volatile suspended solids concentration reduction and
The increase of COD, BOD and ammonia nitrogen isoconcentration.
In the present invention, the biochemical sludge viscosity after pyrohydrolysis pretreating process reduces, mobility increase；Solid constitution
Amount is reduced, and saves the energy；Plate compression dehydration or anaerobic digestion are carried out with it, efficiency greatly improves.
Embodiment
Technical solution of the present invention is described in detail with reference to embodiment.
Embodiment 1-7
In the embodiment, pyrohydrolysis pretreating process is carried out using pyrohydrolysis reactor, constant temperature oven.Transported using batch-type
Line mode.
Processing step：Sludge is derived from sludge dewatering computer room centrifugal dehydration sludge, and mud handling capacity is 2000ml/ batches, uses
Water is diluted to required solid content, is added in pyrohydrolysis reactor, is then heated by constant temperature oven, and temperature is raised to design temperature
Afterwards, the time of lasting insulation extremely setting.After reaction, pyrohydrolysis reactor and sludge cooled to room temperature.Sludge is filled
Enter filter bag and seal, its specific test technology parameter area is as shown in table 1.
Table 1
Between sludge after the pretreatment obtained in embodiment is put into plate and frame filter press filter plate, compresses sheet frame and heaved with pump
Diaphragm pressing sludge, for 1.2mPa, press filtration when no filtrate leaches stops press filtration pressure.Result in embodiment is specifically such as
Shown in table 2.
Table 2
In embodiment, total nickel in former mud>200mg/kg, total zinc>3000mg/kg, content is higher, and dirty in pyrohydrolysis process
The dissolving of mud solid makes sludge dry solids Mass lost, therefore causes after pyrohydrolysis copper, nickel, lead, chromium, zinc, the content of arsenic in sludge
Than increased before pyrohydrolysis, the structure of Heavy Metal Level In Sludge is as shown in table 3 before and after the heat treatment process of embodiment 4.
Heavy Metal Level In Sludge (unit before and after 3 pyrohydrolysis of table：mg/kg)
| Cu | Ni | Pb | Cr | Zn | Hg | As | Cd | |
| Before pyrolysis | 253 | 218 | 69 | 136 | 3007 | 2.16 | 9.95 | Do not detect |
| After pyrolysis | 384 | 343 | 95 | 199 | 3916 | 0.39 | 19.90 | Do not detect |
Claims (8)
- A kind of 1. method handled using pyrohydrolysis pretreating process biochemical sludge, it is characterised in that specific steps are such as Under：(1) biochemical sludge is diluted with water so that the solid content of biochemical sludge is between 5-15%；(2) biochemical sludge for obtaining step (1) carries out pyrohydrolysis, and after reaction, hair is so cooled to room temperature.(3) step (2) is obtained biochemical sludge to be nursed one's health using mix reagent, mix reagent is made of A and B, and A is tri-chlorination Iron or bodied ferric sulfate, B is lime or polyacrylamide PAM, using dosing as medicament dry weight and the radiometer of mud dry weight, A is that 8%~15%, B is 2%~20%；(4) the biochemical sludge plate and frame filter press press filtration for obtaining step (3), obtains dehydrated sludge.
- 2. the method as described in claim 1, it is characterised in that in step (1), the biochemical sludge that is diluted with water, by biochemical dirty The biochemical sludge of water treating pond obtains after dehydration.
- 3. the method as described in claim 1, it is characterised in that in step (1), the solid content of biochemical sludge 10-13% it Between.
- 4. the method as described in claim 1, it is characterised in that in step (2), pyrohydrolysis temperature is 140-200 DEG C.
- 5. the method as described in claim 1 or 4, it is characterised in that in step (2), pyrohydrolysis temperature is 160-180 DEG C.
- 6. the method as described in claim 1, it is characterised in that in step (2), the pyrohydrolysis time is 20-90min.
- 7. the method as described in claim 1 or 6, it is characterised in that the pyrohydrolysis time is 30-50min.
- 8. the method as described in claim 1, it is characterised in that in step (3), mix reagent is the mixed of ferric trichloride and lime Compound.
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| CN201610963488.7A CN108002672A (en) | 2016-10-28 | 2016-10-28 | A kind of method handled using pyrohydrolysis pretreating process biochemical sludge |
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| CN201610963488.7A CN108002672A (en) | 2016-10-28 | 2016-10-28 | A kind of method handled using pyrohydrolysis pretreating process biochemical sludge |
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| CN108002672A true CN108002672A (en) | 2018-05-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109485230A (en) * | 2018-12-14 | 2019-03-19 | 上海电力学院 | A kind of deep dehydration pretreating process filling sludge |
| CN112672806A (en) * | 2019-01-29 | 2021-04-16 | 月岛机械株式会社 | Treatment equipment and treatment method for organic sludge |
| CN113087323A (en) * | 2021-03-05 | 2021-07-09 | 同济大学 | Method for treating sludge based on iron-based catalyst pyrohydrolysis |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103130388A (en) * | 2012-06-26 | 2013-06-05 | 深圳市环源科技发展有限公司 | Sludge treatment and resource utilization method based on pyrohydrolysis and application thereof |
| CN104628233A (en) * | 2014-12-30 | 2015-05-20 | 浙江海亮固废处理科技有限公司 | Deep dehydration device and deep dehydration method for organic materials |
| CN105693058A (en) * | 2016-01-13 | 2016-06-22 | 中广核达胜加速器技术有限公司 | Urban domestic sludge treatment process |
-
2016
- 2016-10-28 CN CN201610963488.7A patent/CN108002672A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103130388A (en) * | 2012-06-26 | 2013-06-05 | 深圳市环源科技发展有限公司 | Sludge treatment and resource utilization method based on pyrohydrolysis and application thereof |
| CN104628233A (en) * | 2014-12-30 | 2015-05-20 | 浙江海亮固废处理科技有限公司 | Deep dehydration device and deep dehydration method for organic materials |
| CN105693058A (en) * | 2016-01-13 | 2016-06-22 | 中广核达胜加速器技术有限公司 | Urban domestic sludge treatment process |
Non-Patent Citations (1)
| Title |
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| 周国强等: "污泥调理对其脱水性能的实验研究", 《环境工程》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109485230A (en) * | 2018-12-14 | 2019-03-19 | 上海电力学院 | A kind of deep dehydration pretreating process filling sludge |
| CN112672806A (en) * | 2019-01-29 | 2021-04-16 | 月岛机械株式会社 | Treatment equipment and treatment method for organic sludge |
| CN113087323A (en) * | 2021-03-05 | 2021-07-09 | 同济大学 | Method for treating sludge based on iron-based catalyst pyrohydrolysis |
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Application publication date: 20180508 |