CN106116107A - A kind of method of deeply dehydrating sludge - Google Patents

A kind of method of deeply dehydrating sludge Download PDF

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Publication number
CN106116107A
CN106116107A CN201610728132.5A CN201610728132A CN106116107A CN 106116107 A CN106116107 A CN 106116107A CN 201610728132 A CN201610728132 A CN 201610728132A CN 106116107 A CN106116107 A CN 106116107A
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CN
China
Prior art keywords
sludge
mud
cement
pressing
deeply dehydrating
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Pending
Application number
CN201610728132.5A
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Chinese (zh)
Inventor
何林
王吉白
肖波
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SICHUAN DEMO-SCIMEE SCIENCE AND TECHNOLOGY Co Ltd
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SICHUAN DEMO-SCIMEE SCIENCE AND TECHNOLOGY Co Ltd
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Priority to CN201610728132.5A priority Critical patent/CN106116107A/en
Publication of CN106116107A publication Critical patent/CN106116107A/en
Pending 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
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • 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 present invention relates to field of sludge treatment, a kind of method being specifically related to deeply dehydrating sludge, comprise the following steps: S1, in mud, add cement, mix homogeneously, obtain mixing sludge, cement add weight percent is mud 1 30%;S2, described mixing sludge is carried out filter pressing, obtain dehydrated sludge cake.Present invention also offers a kind of filter-pressing device.The present invention is by only adding cement as modifier treatment agent in pending water-containing sludge, just can reach the effect of moisture sub-key in mud of abolishing, follow-up use sludge dehydration device can take off water to below 22wt%, considerably improve the effect of deeply dehydrating sludge, the method has easy construction simultaneously, the advantage that processing cost is low.

Description

A kind of method of deeply dehydrating sludge
Technical field
The present invention relates to treating sludge field, particularly to a kind of method of deeply dehydrating sludge.
Background technology
Always one thorny problem being difficult to solve but must solve of the excess sludge of sewage treatment plant, the most all So.Mud has that moisture content is high, perishable, foul smelling, containing features such as a large amount of parasitic ovums and pathogenic microorganisms, as being not added with To deal carefully with, arbitrarily discharge, it will cause secondary pollution;And mud is a kind of effective living resources simultaneously, containing promoting Entering the organic matter of content up to more than 40% in the nutrient substance, and mud such as the nitrogen of crop growth, phosphorus, potassium is good soil Modifying agent.Mud itself is containing the nutrient substance needed for substantial amounts of organic matter and crops, and having filled is a kind of waste.Burning method Cost the highest, the amount of being typically only used for is few, the content of organic matter is high, mud containing poisonous and harmful substance.And utilize mud to produce and have Machine bio-feritlizer can not only eliminate throws aside or fills the secondary pollution and hidden peril of explosion caused, and saves substantial amounts of soil, again profit With mud itself containing the nutrient substance needed for substantial amounts of organic matter and crops, turn waste into wealth, create value.If but Mud is not carried out any process, directly as common fertilizer, then can not fully meet the requirement of plant growth, it is also possible to make Become the pollution of other side.
After the deep dehydration of mud refers to carry out chemical conditioning process by the mud higher to moisture content, then high-pressure compressing Dehydration, to moisture content less than 60%, the most quantitatively reduces more than 50%, it is often more important that make the follow-up treatment approach of mud more For extensively.Mud after deep dehydration has certain calorific value, can be as in the low-grade fuel of power plant and cement production process Grog, it is achieved stable, harmlessness disposing and recycling.Even if filling, land seizure and ring also can be greatly decreased Environment pollution.
Deeply dehydrating sludge technology originates from relatively early abroad, along with specific resistance to filtration art progress and insider The raising of understanding, is the most progressively paid attention to and is had a range of application.It is mainly manifested in all kinds of scientific research institution Mud modifier treatment technology is constantly weeded out the old and bring forth the new, and high pressure filter-press dehydration technology and equipment fast development.Though it can be said that So deeply dehydrating sludge is a link of specific resistance to filtration, current Technology not yet full maturity, but industry pair The understanding of Sludge Disposal Techniques is the most progressively drawn close to deep dehydration direction.
The modifier treatment of mud is key link and the core technology of deeply dehydrating sludge, it may be said that sludge conditioning technology is certainly Determine the success or failure of deeply dehydrating sludge project.The quenched method of domestic mud is the most, commonly used add in mud dehydrant, Flocculant or the method for coagulant, change hydrone (mainly Interstitial Water and capillary water) existing way and structure in mud, have Being beneficial to water realize under certain condition with mud separating, existing mud trial treatment technology typically requires and adds flocculant and basic species Matter, is finally neutralized reaction with acid, and it is numerous that this modifier treatment technique exists medicament kind used, processes complex steps and work Skill parameter problem more rambunctious, the pressure of its follow-up used deep dehydration device for sludge press dry than traditional mud simultaneously Equipment pressure is somewhat larger, and the requirement to equipment is higher.
Summary of the invention
It is an object of the invention to overcome medicament used by the mud modifier treatment existing for existing deeply dehydrating sludge technology Huge number and the above-mentioned deficiency of process complex steps, it is provided that a kind of method of deeply dehydrating sludge, by containing at pending Sewage sludge only adds cement as modifier treatment agent, just can reach the effect of moisture sub-key in mud of abolishing, at pressurized condition Under water can be taken off to 22% weight content, considerably improve the effect of deeply dehydrating sludge, the method has simultaneously Easy construction, the advantage that processing cost is low.
To achieve these goals, the technical solution used in the present invention is:
A kind of method of deeply dehydrating sludge, comprises the following steps:
S1, adding cement, mix homogeneously in mud, obtain mixing sludge, the weight percent that cement adds be dirt The 1-30% of mud;
S2, described mixing sludge is carried out filter pressing, obtain dehydrated sludge cake.
The present invention is by pending water-containing sludge, addition cement is as modifier treatment agent, and cement occurs in mud Chemical reaction can reach to abolish the effect of moisture sub-key in mud, make moisture in mud be more easy in follow-up filter pressing operation Removing.
Preferably, the moisture content of above-mentioned mud is 70~95%.
Preferably, above-mentioned cement is 42.5 portland cements, 42.5R portland cement, 52.5 portland cements and 52.5R One or more in portland cement.
Preferably, weight percent is mud the 5~25% of above-mentioned cement addition.
Preferably, weight percent is mud the 10~20% of above-mentioned cement addition.
Preferably, weight percent is mud the 15% of above-mentioned cement addition.
Preferably, in above-mentioned steps S1, the mode of mixing is stirring, and mixing time is 10~30 minutes.
Another object of the present invention is to provide a kind of filter-pressing device for above-mentioned mixing sludge, this device includes pressing dry Storehouse, stripper plate and hydraulic cylinder, described stripper plate is contained in and press dry storehouse inner chamber, and with press dry the top of storehouse inner chamber, bottom cooperates, institute Stating and have equally distributed hole on stripper plate, described stripper plate adds drainage screen away from one end of mud, and described hydraulic cylinder sets Put at the described head and the tail two ends pressing dry storehouse, and be connected with described stripper plate by push rod, described in press dry in the bottom of storehouse inner chamber Section is equipped with sludge inlet, and left side and the right side of described sludge inlet are respectively arranged with filtrate (liquid.
Preferably, the above-mentioned caudal of storehouse inner chamber that press dry is equipped with active page door, and the dehydrated sludge cake after filter pressing is by active page door Release.
Preferably, the moisture content of above-mentioned dehydrated sludge cake is 22~60%.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows: by pending aqueous In mud, addition cement is as modifier treatment agent, and the chemical reaction that cement occurs in mud can reach to abolish moisture in mud The effect of sub-key, make moisture in mud be more easy to removing, the present invention provide filter-pressing device by arranging horizontally-opposed hydraulic cylinder, Achieve the synchronization to stripper plate and drive mobile, the mud effect of being squeezed between two stripper plates when moving towards, Moisture is discharged, in device for dehydrating sladge waste compared to existing technology by the left side of bottom and the filtrate (liquid on right side pressing dry storehouse inner chamber Major part filtrate can only cross water by side, does not has normal filtrate circulation passage, and extrusion time extends more, and the present invention provides Filter pressing action pattern succinctly efficient, filtrate is discharged smooth and easy.The length that the rhythm fed by control and hydraulic cylinder push rod are stretched out Degree, it is achieved the regulation to mud squeezing effect, it is possible to by the mud extrusion dehydration of conditioned process to certain moisture content scope, It is beneficial to the processing of follow-up dispensing.
Accompanying drawing explanation
Fig. 1 is the structural representation of the filter-pressing device that the present invention provides.
Labelling in figure: 1-hydraulic cylinder, 2-press dry storehouse, 3-stripper plate, 4-push rod, 5-filtrate (liquid, 6-mud import.
Detailed description of the invention
Below in conjunction with test example and detailed description of the invention, the present invention is described in further detail.But this should not understood Scope for the above-mentioned theme of the present invention is only limitted to below example, and all technology realized based on present invention belong to this The scope of invention.
Embodiment 1
A kind of method of deeply dehydrating sludge, comprises the following steps:
S1, adding 42.5R portland cement be uniformly mixed in the mud that moisture content is 85%, mixing time is 20 Minute, obtain mixing sludge, weight content is mud the 10% of cement addition;
S2, by described mixing sludge feeding filter-pressing device carry out filter pressing, obtaining moisture content is 35% dehydrated sludge cake.
Below in conjunction with the accompanying drawings, the filter-pressing device of the present invention is described in detail.
As it is shown in figure 1, a kind of filter-pressing device, including pressing dry storehouse 2, stripper plate 3 and hydraulic cylinder 1, described stripper plate 3 is contained in pressure Dry storehouse 2 inner chamber, and with press dry the top of storehouse 2 inner chamber, bottom cooperates, and described stripper plate 3 has equally distributed hole, described Stripper plate 3 adds drainage screen away from one end of mud, described hydraulic cylinder 1 be contained in described in press dry the head and the tail two ends in storehouse 2, and pass through Push rod 4 is connected with described stripper plate 3, described in press dry the stage casing of bottom of storehouse 2 inner chamber equipped with sludge inlet 6, described sludge inlet 6 Left side and right side be respectively provided with filtrate (liquid 5.The synchronization action of the hydraulic cylinder 1 at the head and the tail two ends in storehouse 2 is pressed dry, control by control In system press dry storehouse 2, stripper plate 3 synchronizes to move in opposite directions or dorsad, when synchronizing to move towards, is pointed to mud thing between the two Material extrudes, and moisture is discharged by the filtrate (liquid 5 pressing dry storehouse 2 intracavity bottom.
The work process of the filter-pressing device that the present invention provides is: under initial situation, the push rod in the hydraulic cylinder 1 at two ends from beginning to end 4 fully bounce back, and press dry the stripper plate 3 in storehouse 2 and move to press dry the two ends of storehouse 2 inner chamber;Need the mud carrying out processed by Mud import 6 enters the inner chamber pressing dry storehouse 2;When the inner chamber pressing dry storehouse 2 has enough sludge material, stop charging, now liquid Cylinder pressure 1 starts, and press dry the stripper plate 3 at inner chamber two ends, storehouse 2 and moves towards mud is carried out extrusion dehydration, and moisture is by pressing dry the end, storehouse 2 The filtrate (liquid 5 in portion is discharged and is pressed dry outside storehouse 2.
Following embodiment 2-6 all uses above-mentioned filter-pressing device that mixing sludge is carried out filter pressing.
Embodiment 2
A kind of method of deeply dehydrating sludge, comprises the following steps:
S1, in the mud that moisture content is 80%, add 52.5R portland cement cement mixing mix homogeneously, mixing time It is 20 minutes, obtains mixing sludge, weight content is mud the 5% of cement addition;
S2, by described mixing sludge feeding filter-pressing device carry out filter pressing, obtaining moisture content is 45% dehydrated sludge cake.
Embodiment 3
A kind of method of deeply dehydrating sludge, comprises the following steps:
S1, adding 42.5 portland cements be uniformly mixed in the mud that moisture content is 70%, mixing time is 10 Minute, obtain mixing sludge, weight content is mud the 15% of cement addition;
S2, by described mixing sludge feeding filter-pressing device carry out filter pressing, obtaining moisture content is 31% dehydrated sludge cake.
Embodiment 4
A kind of method of deeply dehydrating sludge, comprises the following steps:
S1, adding 42.5R portland cement be uniformly mixed in the mud that moisture content is 95%, mixing time is 30 Minute, obtain mixing sludge, weight content is mud the 20% of cement addition;
S2, by described mixing sludge feeding filter-pressing device carry out filter pressing, obtaining moisture content is 32% dehydrated sludge cake.
Embodiment 5
A kind of method of deeply dehydrating sludge, comprises the following steps:
S1, in the mud that moisture content is 90%, add 52.5 portland cement cement mixing mix homogeneously, mixing time It is 20 minutes, obtains mixing sludge, weight content is mud the 25% of cement addition;
S2, by described mixing sludge feeding filter-pressing device carry out filter pressing, obtain the dehydrated sludge cake that moisture content is 28%.
Embodiment 6
A kind of method of deeply dehydrating sludge, comprises the following steps:
S1, in the mud that moisture content is 84%, add 42.5R portland cement cement mixing mix homogeneously, mixing time It is 20 minutes, obtains mixing sludge, weight content is mud the 30% of cement addition;
S2, by described mixing sludge feeding filter-pressing device carry out filter pressing, obtain the dehydrated sludge cake that moisture content is 22%.
Test case
This testing experiment uses Huang Yan river mud as raw material, and former mud moisture content is 84.9%, according to sludge pressing principle, First Huang Yan river mud is added medicament mix homogeneously according to a certain percentage, then by water in mud by the way of high-pressure compressing Dividing potential drop is squeezed out, and with the moisture percentage in sewage sludge after squeezing less than 60% as target, test result is as shown in following table one.
Table 1 adds different adjusting material test data
Note: the mud special dehydrant that dehydrant provides for certain company, price is 6000 yuan/ton.
As can be seen from Table 1 in the case of not adding any medicament, after squeezing, moisture content of the cake is 69.4%;Select certain After the mud special dehydrant of company's offer and organic flocculant PAM carry out pretreatment as mixing adjusting material to mud, squeezing Rear moisture content of the cake is 76.5%, and after improving dehydrant consumption (2 times of consumptions) further, moisture content of the cake only reduces by 4.8%;And The cement selecting 425 models adds in mud after mix homogeneously as adjusting material, and after squeezing, moisture content of the cake is only 45.6%, de- Water effect significantly improves.Shown by this and test of many times result, mud adds appropriate cement, in suitably pressurization In the case of can guarantee that moisture percentage in sewage sludge is reduced to less than 50%.

Claims (10)

1. the method for a deeply dehydrating sludge, it is characterised in that comprise the following steps:
S1, adding cement, mix homogeneously in mud, obtain mixing sludge, the weight percent that cement adds is mud 1-30%;
S2, described mixing sludge is carried out filter pressing, obtain dehydrated sludge cake.
The method of deeply dehydrating sludge the most according to claim 1, it is characterised in that the moisture content of described mud be 70~ 95%.
The method of deeply dehydrating sludge the most according to claim 1, it is characterised in that described cement is 42.5 silicate cements One or more in mud, 42.5R portland cement, 52.5 portland cements and 52.5R portland cement.
The method of deeply dehydrating sludge the most according to claim 1, it is characterised in that the weight percent that described cement adds Ratio is the 5~25% of mud.
The method of deeply dehydrating sludge the most according to claim 4, it is characterised in that the weight percent that described cement adds Ratio is the 10~20% of mud.
The method of deeply dehydrating sludge the most according to claim 5, it is characterised in that the weight percent that described cement adds Ratio is the 15% of mud.
The method of deeply dehydrating sludge the most according to claim 1, it is characterised in that the mode of mixing in described step S1 For stirring, mixing time is 10~30 minutes.
8. the filter-pressing device for the mixing sludge described in claim 1, it is characterised in that include pressing dry storehouse, stripper plate And hydraulic cylinder, described stripper plate is contained in and press dry storehouse inner chamber, and with press dry the top of storehouse inner chamber, bottom cooperates, described stripper plate On have equally distributed hole, described stripper plate adds drainage screen away from one end of mud, and described hydraulic cylinder is arranged on described Press dry the head and the tail two ends in storehouse, and be connected with described stripper plate by push rod, described in press dry the stage casing of bottom of storehouse inner chamber equipped with dirt Mud entrance, left side and the right side of described sludge inlet are respectively arranged with filtrate (liquid.
Filter-pressing device the most according to claim 8, it is characterised in that described in press dry the tail end of storehouse inner chamber and be additionally provided with active page Door, the dehydrated sludge cake after filter pressing is released by active page door.
The method of deeply dehydrating sludge the most according to claim 1, the moisture content of described dehydrated sludge cake is 22~60%.
CN201610728132.5A 2016-08-25 2016-08-25 A kind of method of deeply dehydrating sludge Pending CN106116107A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106985435A (en) * 2017-03-27 2017-07-28 林和军 A kind of filter residue(Mud)De- liquid(Water)The method of briquetting packing
CN108191201A (en) * 2018-01-15 2018-06-22 湖南望隆企业管理咨询有限公司 A kind of squash type sludge-dewatering dryer
CN108434801A (en) * 2018-04-25 2018-08-24 广西联壮科技股份有限公司 A kind of de-watering of slurries filter-pressing device
CN108557967A (en) * 2018-04-05 2018-09-21 武汉理工大学 A kind of cyanobacteria cleaning plant applied to landscape water body
CN110255849A (en) * 2019-06-06 2019-09-20 北京矿冶科技集团有限公司 For emulsifying the solid-liquid separation system and method for sludge

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59147700A (en) * 1983-02-10 1984-08-24 Takenaka Komuten Co Ltd Treatment of sludge
CN101007699A (en) * 2007-01-26 2007-08-01 广州铬德工程有限公司 Sludge dewatering process
CN103771678A (en) * 2012-10-24 2014-05-07 聊城鑫科尼节能环保设备有限公司 Efficient sludge hydraulic dehydrator
CN105036509A (en) * 2015-06-25 2015-11-11 天津市彤泰成科技有限公司 Extrusion type sludge dewatering equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59147700A (en) * 1983-02-10 1984-08-24 Takenaka Komuten Co Ltd Treatment of sludge
CN101007699A (en) * 2007-01-26 2007-08-01 广州铬德工程有限公司 Sludge dewatering process
CN103771678A (en) * 2012-10-24 2014-05-07 聊城鑫科尼节能环保设备有限公司 Efficient sludge hydraulic dehydrator
CN105036509A (en) * 2015-06-25 2015-11-11 天津市彤泰成科技有限公司 Extrusion type sludge dewatering equipment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106985435A (en) * 2017-03-27 2017-07-28 林和军 A kind of filter residue(Mud)De- liquid(Water)The method of briquetting packing
CN108191201A (en) * 2018-01-15 2018-06-22 湖南望隆企业管理咨询有限公司 A kind of squash type sludge-dewatering dryer
CN108557967A (en) * 2018-04-05 2018-09-21 武汉理工大学 A kind of cyanobacteria cleaning plant applied to landscape water body
CN108434801A (en) * 2018-04-25 2018-08-24 广西联壮科技股份有限公司 A kind of de-watering of slurries filter-pressing device
CN110255849A (en) * 2019-06-06 2019-09-20 北京矿冶科技集团有限公司 For emulsifying the solid-liquid separation system and method for sludge

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