CN107601803A - A kind of material hardening and tempering method of supercritical water oxidation processing sludge - Google Patents
A kind of material hardening and tempering method of supercritical water oxidation processing sludge Download PDFInfo
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- CN107601803A CN107601803A CN201710843441.1A CN201710843441A CN107601803A CN 107601803 A CN107601803 A CN 107601803A CN 201710843441 A CN201710843441 A CN 201710843441A CN 107601803 A CN107601803 A CN 107601803A
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Abstract
The present invention relates to environmentally friendly fixed-end forces technical field, discloses a kind of material hardening and tempering method of supercritical water oxidation processing sludge, including (1) dilution viscosity reduction processing：Dilution viscosity reduction liquid is added in sludge, and is stirred using anchor formula and shearing disk combined blender；(2) mechanical purifying is handled：The mud after diluting viscosity reduction is sieved using vibratory sieve；(3) Swirling flow sand-removing is handled：The fine sand after mechanical purifying is handled in mud is removed using cyclone separator；(4) slurrying processing is ground：Mud after Swirling flow sand-removing is handled using milling apparatus is ground.The present invention realizes under normal temperature, normal pressure, it is not necessary to heats, pressurizes, safe and reliable, energy consumption is low；Sludge after processing uniformly, stably, there is preferable mobility, be easy to transport and store, can be provided safeguard for overcritical water oxidization reactor continuous feeding and even running.
Description
Technical field
The invention belongs to environmentally friendly fixed-end forces technical field, more particularly to a kind of thing of supercritical water oxidation processing sludge
Expect hardening and tempering method.
Background technology
Sludge is a kind of intractable solid waste, contains a large amount of microorganisms, pathogen, heavy metal and organic pollution
Deng complicated component, it is extremely difficult to handle, be the primary pollution source of sewage disposal system.
Supercritical Water Oxidation Technology is a kind of advanced oxidation technology, when water is in 374.3 DEG C of temperature, pressure 22.05MPa
In a supercritical state during the above, the water of the state is supercritical water, is that one kind is different from liquid and gaseous new state, its
Property is between gas and liquid, the dissolution characteristics not only with liquid but also the transmission characteristic with gas, can be with oxygen, two
Any ratio such as carbonoxide and organic matter dissolves each other, and forms homogeneous phase.This speciality of supercritical Water Oxidation Technology application supercritical water,
Make organic matter that strong oxidation reaction quickly occur with oxidant, in a short time by difficult degradation, poisonous and hazardous organic matter
It is converted into CO2And H2O, nitrogen is converted into N2Or N2O etc., the element oxides such as phosphorus, chlorine and sulphur are faced in the form of inorganic salts from super
Deposited in boundary's water, realize the innoxious of toxic organic pollutantses.Supercritical water oxidation treatment device is typically pressurized by liquid
System, oxygen pressure charging system, pre-heating system, reaction system, Separate System of Water-jet etc. form, and its core component is reactor.
Supercritical Water Oxidation Technology provides a kind of new method for the processing of sludge.But sludge is in half after centrifugal dehydration
Solid-state paste or bulk, viscosity is high, quality is uneven, and contains the hard particles such as impurity and gravel.These properties to apply
When supercritical Water Oxidation Technology handles sludge, it is difficult to realize that the suspension of material transports, can not be reactor continuous feeding, also easily
Cause pipeline deposition to block, equipment attrition, have a negative impact to the long-period stable operation of equipment.Therefore, enter in sludge
It is before overcritical water oxidization reactor, it is necessary to quenched to sludge progress, the indexs such as viscosity, particle diameter are adjusted.
The content of the invention
The present invention is the technical problem for solving Treatment of Sludge present in supercritical Water Oxidation Technology application, there is provided Yi Zhongchao
The material hardening and tempering method of critical oxidation processes sludge, it is possible to achieve material suspended defeated during supercritical Water Oxidation Technology processing sludge
Fortune and reactor continuous feed, are significant for application of the supercritical Water Oxidation Technology in Treatment of Sludge.
In order to solve the above-mentioned technical problem, the present invention is achieved by following technical scheme：
A kind of material hardening and tempering method of supercritical water oxidation processing sludge, this method include dilution viscosity reduction, mechanical purifying, rotation
Flow desanding and grinding slurrying processing procedure；Comprise the following steps that：
(1) viscosity reduction processing is diluted：Dilution viscosity reduction liquid is added in moisture content 80-85% sludge, and using anchor formula and is cut
Cutting disc combined blender is stirred, and is sufficiently mixed sludge and dilution viscosity reduction liquid, is improved moisture percentage in sewage sludge to 90%-92%
And sewage sludge viscosity is set to be reduced to below 100mPas；
(2) mechanical purifying is handled：The mud after diluting viscosity reduction is sieved using vibratory sieve；
(3) Swirling flow sand-removing is handled：The fine sand after mechanical purifying is handled in mud is removed using cyclone separator；
(4) slurrying processing is ground：Mud after Swirling flow sand-removing is handled using milling apparatus is ground；
(5) 1-2 step (3) and step (4) are repeated, until mud particle size controlling is below 100 μm.
In the dilution viscosity reduction processing of step (1), the dilution viscosity reduction liquid is water-soluble from the NaOH that mass concentration is 5%-9%
Liquid or the sodium dodecyl benzene sulfonate aqueous solution that mass concentration is 0.5%-1.5%.
In the dilution viscosity reduction processing of step (1), the anchor formula and shearing disk combined blender are to be arranged on dilution viscosity reduction
The anchor agitator and shearing disc mixer of unit tank interior, wherein the blade of the anchor agitator is located under tank body
Portion, speed of agitator are respectively 40-60rpm, mixing time 1-2 hours；The blade of the shearing disc mixer is located in tank body
Portion, speed of agitator are respectively 300-500rpm, mixing time 1-2 hours.
In the mechanical purifying processing of step (2), the screen size of the vibratory sieve is 20-40 mesh.
In the Swirling flow sand-removing processing of step (3), the particle separation diameter of the cyclone separator is 100-150 μm.
In the grinding slurrying processing of step (4), the outlet particle diameter of the milling apparatus is less than 100 μm.
The beneficial effects of the invention are as follows：
Each relevant device is organically combined using physics, chemical method, is formed system by the material hardening and tempering method of the present invention
Processing method；Realized under normal temperature, normal pressure, it is not necessary to heat, pressurize, safe and reliable, energy consumption is low；Material through the present invention is adjusted
Matter method processing after sludge, uniformly, stably, there is preferable mobility, be easy to transport and store, can be supercritical water oxidation
Reactor continuous feeding and even running provide safeguard.
Brief description of the drawings
Fig. 1 is the process chart of the material hardening and tempering method of supercritical water oxidation processing sludge provided by the present invention.
Embodiment
For the content of the invention, feature and the effect of the present invention can be further appreciated that, following examples are hereby enumerated, and coordinate accompanying drawing
Describe in detail as follows：
As shown in figure 1, the invention discloses a kind of material hardening and tempering method of supercritical water oxidation Treatment of Sludge, including dilution
Viscosity reduction, mechanical purifying, Swirling flow sand-removing and grinding slurrying processing procedure.Sludge in holding tank has necessarily by dilution viscosity reduction
Mobility, mechanical purifying remove the impurity in sludge, and Swirling flow sand-removing removes the gravel in sludge, and last ground slurrying is further
Sludge particle diameter is reduced, forms homogeneous, stable slurries, is pumped into pending in buffer tank, it is continuous with reactor to realize that sludge transports
Charging.
(1) viscosity reduction is diluted：
Dilution viscosity reduction liquid is first added in viscosity reduction unit is diluted, it is 5%-9%'s that mass concentration, which can be selected, in dilution viscosity reduction liquid
The NaOH aqueous solution or the sodium dodecyl benzene sulfonate aqueous solution that mass concentration is 0.5%-1.5%；Then add in proportion aqueous
Rate 80-85% sludge, while sludge and dilution viscosity reduction liquid are uniformly stirred using anchor formula and shearing disk combined blender
Mix, optimal mixing time 1-2 hours, be sufficiently mixed sludge and dilution viscosity reduction liquid.Anchor formula and shearing disk combined blender are
The anchor agitator and shearing disc mixer, wherein anchor agitator blade for being arranged on dilution viscosity reduction unit tank interior are located at
Tank body lower part, optimal speed of agitator are respectively 40-60rpm, prevent suspended solid from depositing and producing dead angle；Shear disc mixer
Blade is located in the middle part of tank body, and optimal speed of agitator is respectively 300-500rpm, for smashing block sludge.
Said process improves moisture percentage in sewage sludge by physical dilution, reaches optimum moisture content 90%-92%, and pass through
Sludge modification is made sewage sludge viscosity be reduced to below 100mPas by more than 20000mPas by chemical action, is diluted at viscosity reduction
Sludge turns into the mud with preferable mobility after reason, thus allows for suspension and transports.
(2) mechanical purifying：
The mud after diluting viscosity reduction is sieved using vibratory sieve, vibratory sieve optimum pattern is spin vibration sieve, can be effective
Prevent slurries to be lost in, optimal screen size 20-40 mesh, remove large volume impurity in mud, reduce the abrasion and event of follow-up equipment
Barrier.
(3) Swirling flow sand-removing：
The fine sand after mechanical purifying is handled in mud is removed using cyclone separator, optimal separation particle diameter is 100-150 μm,
Reduce processing load and the abrasion of milling apparatus.
(4) slurrying is ground：
Mud after Swirling flow sand-removing is handled using milling apparatus is ground, and particle in mud is further refined, most
Good outlet particle diameter is less than 100 μm, and mud particle particle diameter is finally controlled below 100 μm, forms homogeneous, stable slurries, has
Beneficial to reactor continuous feeding and stable operation.To ensure grinding effect, milling apparatus outlet mud need to be back to eddy flow point again
From device, repeat 2-3 cyclonic separation-process of lapping.
Embodiment 1
Sludge by holding tank sequentially enter charging equipment, dilution viscosity reduction unit, mechanical purifying unit, Swirling flow sand-removing unit,
Slurrying unit is ground, it is pending that homogenizing slurry caused by grinding slurrying unit is pumped into surge tank.
Dilution viscosity reduction unit is connected with sludge charging equipment, in the NaOH aqueous solution (dilution viscosity reduction liquid) of mass concentration 7%
In add moisture content 80-85% sludge, by anchor formula and shearing disc type combined impeller, in rotating speed 50rpm, (anchor formula is stirred respectively
Mix device blade) and 400rpm (shearing disc type propeller-blade) under the conditions of, stir 1.5 hours, make sludge and viscosity reduction liquid fully mixed
Close, sludge is diluted to by moisture content 90%-92% by physical dilution, and sludge modification is made by chemical action, reduce sludge
Viscosity becomes the mud with preferable mobility；
Mechanical purifying unit is connected with dilution viscosity reduction unit, using the spin vibration sieve that screen size is 30 mesh, removes in mud
The impurity of large volume；
Swirling flow sand-removing unit is connected with mechanical purifying unit, using 100-150 μm of hydrocyclone of particle separation diameter, removes
Fine sand in mud, reduce processing load and the abrasion of milling apparatus；
Grinding slurrying unit is connected with Swirling flow sand-removing unit, and 100 μm of grinding pump is less than using outlet particle diameter, mud is entered
The grinding of one step, refinement, and outlet mud is back to hydrocyclone, repeat 2 Swirling flow sand-removings-grinding pulping process,
Ensure that particle diameter meets the requirement of reactor.
In the present embodiment, the mud viscosity after diluting viscosity reduction cell processing is less than 100mPas, has preferably flowing
Property；Mud particle diameter after mechanical purifying, Swirling flow sand-removing and grinding slurrying is less than 100 μm, and homogeneous, stably meets conveying equipment
And the requirement of reactor.
Embodiment 2
The present embodiment differs only in embodiment 1：It is water-soluble from the NaOH that mass concentration is 5% to dilute viscosity reduction liquid
Liquid；In anchor formula and shearing disc type combined impeller, the rotating speed of anchor agitator blade is 40rpm, shears disc type propeller-blade
Rotating speed be 300rpm；Mixing time is 2 hours；The screen size of spin vibration sieve is 20 mesh；Repeat 3 Swirling flow sand-removings-grind
Grind pulping process.
In the present embodiment, the mud viscosity after diluting viscosity reduction cell processing is less than 100mPas, has preferably flowing
Property；Mud particle diameter after mechanical purifying, Swirling flow sand-removing and grinding slurrying is less than 100 μm, and homogeneous, stably meets conveying equipment
And the requirement of reactor.
Embodiment 3
The present embodiment differs only in embodiment 1：It is water-soluble from the NaOH that mass concentration is 9% to dilute viscosity reduction liquid
Liquid；In anchor formula and shearing disc type combined impeller, the rotating speed of anchor agitator blade is 40rpm, shears disc type propeller-blade
Rotating speed be 300rpm；Mixing time is 1 hour；The screen size of spin vibration sieve is 40 mesh；Repeat 2 Swirling flow sand-removings-grind
Grind pulping process.
In the present embodiment, the mud viscosity after diluting viscosity reduction cell processing is less than 100mPas, has preferably flowing
Property；Mud particle diameter after mechanical purifying, Swirling flow sand-removing and grinding slurrying is less than 100 μm, and homogeneous, stably meets conveying equipment
And the requirement of reactor.
Embodiment 4
The present embodiment differs only in embodiment 1：Viscosity reduction liquid is diluted from the dodecyl that mass concentration is 1.5%
Benzene sulfonate aqueous solution；In anchor formula and shearing disc type combined impeller, the rotating speed of anchor agitator blade is 40rpm, shearing disk
The rotating speed of formula propeller-blade is 300rpm；Mixing time is 1 hour；The screen size of spin vibration sieve is 40 mesh；Repeat 2 times
Swirling flow sand-removing-grinding pulping process.
In the present embodiment, the mud viscosity after diluting viscosity reduction cell processing is less than 100mPas, has preferably flowing
Property；Mud particle diameter after mechanical purifying, Swirling flow sand-removing and grinding slurrying is less than 100 μm, and homogeneous, stably meets conveying equipment
And the requirement of reactor.
Embodiment 5
The present embodiment differs only in embodiment 1：Viscosity reduction liquid is diluted from the dodecyl that mass concentration is 0.5%
Benzene sulfonate aqueous solution；In anchor formula and shearing disc type combined impeller, the rotating speed of anchor agitator blade is 60rpm, shearing disk
The rotating speed of formula propeller-blade is 500rpm；Mixing time is 2 hours；The screen size of spin vibration sieve is 20 mesh；Repeat 3 times
Swirling flow sand-removing-grinding pulping process.
In the present embodiment, the mud viscosity after diluting viscosity reduction cell processing is less than 100mPas, has preferably flowing
Property；Mud particle diameter after mechanical purifying, Swirling flow sand-removing and grinding slurrying is less than 100 μm, and homogeneous, stably meets conveying equipment
And the requirement of reactor.
Embodiment 6
The present embodiment differs only in embodiment 1：Viscosity reduction liquid is diluted from the detergent alkylate that mass concentration is 1%
Sulfonic acid sodium water solution；In anchor formula and shearing disc type combined impeller, the rotating speed of anchor agitator blade is 50rpm, shears disc type
The rotating speed of propeller-blade is 400rpm；Mixing time is 1.5 hours；The screen size of spin vibration sieve is 30 mesh；Repeat 2 times
Swirling flow sand-removing-grinding pulping process.
In the present embodiment, the mud viscosity after diluting viscosity reduction cell processing is less than 100mPas, has preferably flowing
Property；Mud particle diameter after mechanical purifying, Swirling flow sand-removing and grinding slurrying is less than 100 μm, and homogeneous, stably meets conveying equipment
And the requirement of reactor.
It can be seen that the present invention using dilution viscosity reduction, reduce sewage sludge viscosity, formation there is mobility mud, using mechanical purifying,
Swirling flow sand-removing and grinding slurrying, control mud particle diameter, form homogeneous, stable slurry, be easy to transport and store, can be continuously super
The supply of critical oxidation reactor meets desired material, reactor plugs is effectively avoided, at supercritical Water Oxidation Technology
The application of reason sludge has very high value.
Although the preferred embodiments of the present invention are described above in conjunction with accompanying drawing, the invention is not limited in upper
The embodiment stated, above-mentioned embodiment is only schematical, be not it is restricted, this area it is common
Technical staff in the case of present inventive concept and scope of the claimed protection is not departed from, may be used also under the enlightenment of the present invention
By make it is many in the form of specific conversion, these are belonged within protection scope of the present invention.
Claims (6)
1. a kind of material hardening and tempering method of supercritical water oxidation processing sludge, it is characterised in that this method includes dilution viscosity reduction, machine
Tool removal of impurities, Swirling flow sand-removing and grinding slurrying processing procedure；Comprise the following steps that：
(1) viscosity reduction processing is diluted：Dilution viscosity reduction liquid is added in moisture content 80-85% sludge, and uses anchor formula and shearing disk
Combined blender is stirred, and is sufficiently mixed sludge and dilution viscosity reduction liquid, improving moisture percentage in sewage sludge to 90%-92% and makes
Sewage sludge viscosity is reduced to below 100mPas；
(2) mechanical purifying is handled：The mud after diluting viscosity reduction is sieved using vibratory sieve；
(3) Swirling flow sand-removing is handled：The fine sand after mechanical purifying is handled in mud is removed using cyclone separator；
(4) slurrying processing is ground：Mud after Swirling flow sand-removing is handled using milling apparatus is ground；
(5) 1-2 step (3) and step (4) are repeated, until mud particle size controlling is below 100 μm.
A kind of 2. material hardening and tempering method of supercritical water oxidation processing sludge according to claim 1, it is characterised in that step
Suddenly in the dilution viscosity reduction processing of (1), the dilution viscosity reduction liquid is dense from the NaOH aqueous solution or quality that mass concentration is 5%-9%
Spend the sodium dodecyl benzene sulfonate aqueous solution for 0.5%-1.5%.
A kind of 3. material hardening and tempering method of supercritical water oxidation processing sludge according to claim 1, it is characterised in that step
Suddenly in the dilution viscosity reduction processing of (1), the anchor formula and shearing disk combined blender are diluted in viscosity reduction unit tank body to be arranged on
The anchor agitator and shearing disc mixer in portion, wherein the blade of the anchor agitator is located at tank body lower part, speed of agitator
Respectively 40-60rpm, mixing time 1-2 hours；The blade of the shearing disc mixer is located in the middle part of tank body, speed of agitator
Respectively 300-500rpm, mixing time 1-2 hours.
A kind of 4. material hardening and tempering method of supercritical water oxidation processing sludge according to claim 1, it is characterised in that step
Suddenly in the mechanical purifying processing of (2), the screen size of the vibratory sieve is 20-40 mesh.
A kind of 5. material hardening and tempering method of supercritical water oxidation processing sludge according to claim 1, it is characterised in that step
Suddenly in the Swirling flow sand-removing processing of (3), the particle separation diameter of the cyclone separator is 100-150 μm.
A kind of 6. material hardening and tempering method of supercritical water oxidation processing sludge according to claim 1, it is characterised in that step
Suddenly in the grinding slurrying processing of (4), the outlet particle diameter of the milling apparatus is less than 100 μm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108529788A (en) * | 2018-04-25 | 2018-09-14 | 中国海洋石油集团有限公司 | A kind of purification method and device of waste liquid from bromine extraction |
| CN113045022A (en) * | 2021-04-21 | 2021-06-29 | 新地环保技术有限公司 | Supercritical water oxidation treatment phosphorus-containing waste and phosphorus recovery method |
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| CN102452783A (en) * | 2010-11-03 | 2012-05-16 | 新奥科技发展有限公司 | Compound agent for raising slurry concentration and method thereof |
| CN104326637A (en) * | 2014-10-21 | 2015-02-04 | 新奥科技发展有限公司 | Sludge treatment method |
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2017
- 2017-09-18 CN CN201710843441.1A patent/CN107601803A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452783A (en) * | 2010-11-03 | 2012-05-16 | 新奥科技发展有限公司 | Compound agent for raising slurry concentration and method thereof |
| CN104326637A (en) * | 2014-10-21 | 2015-02-04 | 新奥科技发展有限公司 | Sludge treatment method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108529788A (en) * | 2018-04-25 | 2018-09-14 | 中国海洋石油集团有限公司 | A kind of purification method and device of waste liquid from bromine extraction |
| CN108529788B (en) * | 2018-04-25 | 2024-01-05 | 中国海洋石油集团有限公司 | Purifying method and device for bromine extraction waste liquid |
| CN113045022A (en) * | 2021-04-21 | 2021-06-29 | 新地环保技术有限公司 | Supercritical water oxidation treatment phosphorus-containing waste and phosphorus recovery method |
| CN113045022B (en) * | 2021-04-21 | 2022-11-15 | 新地环保技术有限公司 | Supercritical water oxidation treatment phosphorus-containing waste and phosphorus recovery method |
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Application publication date: 20180119 |