CN110194576A - Refine oil plant excess sludge dewatering and device - Google Patents
Refine oil plant excess sludge dewatering and device Download PDFInfo
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- CN110194576A CN110194576A CN201910549483.3A CN201910549483A CN110194576A CN 110194576 A CN110194576 A CN 110194576A CN 201910549483 A CN201910549483 A CN 201910549483A CN 110194576 A CN110194576 A CN 110194576A
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- sludge
- eddy flow
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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
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
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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
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
Abstract
This disclosure relates to refine oil plant excess sludge dewatering and device, a kind of oil refining plant excess sludge dewatering is provided, method includes the following steps: (A) oil refining plant excess sludge eddy flow rotation dehydration；(B) dewatered sludge flow acceleration sorts；(C) enter the dehydration of eddy flow rotation next time after the high mud granule returning charge of the moisture content sub-elected in step (B) and wet mud mixing granulation；(D) the low sludge eddy flow rotation of the moisture content sub-elected is dehydrated again and granule capturing；And the oil carried in gas obtained in (E) cyclone gas-liquid separation removal step (D) obtains clean gas and recycles mutually with moisture drop.Additionally provide a kind of oil refining plant excess sludge dehydration device.
Description
Technical field
The disclosure belongs to petrochemical industry and environment protection field, is related to a kind of realize and refines oil moisture and oily phase in plant excess sludge
The method and apparatus of removing and the sorting returning charge of dewatered sludge.Specifically, this disclosure relates to a kind of oil refining plant excess sludge
Deep dehydration method and device.
Background technique
Oil production rate is continuously increased, and the yield for refining oil plant excess sludge also constantly increases with it, if remaining dirty to these
Mud is untreated or deals with improperly, not only pollutes the environment, and pollutes periphery water source and arable land, while being also to the one of petroleum resources
Kind significant wastage.Excess sludge is bulky, perishable, foul smelling, contains a large amount of parasitic ovums and pathogenic microorganism, and aqueous
Rate is high, and more than moisture content 95% (weight), and containing a small amount of oil, specific gravity 1.06 is always in sewage from oil refinery treatment process
Technical problem.The processing cost of excess sludge has accounted for the 25%~65% of entire sewage treatment expense, and presents and rise year by year
How trend realizes that the minimizing of excess sludge, innoxious, recycling have become a top priority.
The dewatering of excess sludge is mainly natural-dehydration and mechanical dehydration at present.Natural-dehydration be using evaporation,
The natural forces such as infiltration are dehydrated, and main units are desiccation factory, the desiccation phase by several weeks to several months etc., dewatered sludge it is aqueous
Rate can be down to 65%~75% (weight) and take up a large area although simple and easy, the labor of sanitary condition difference and scraper dewatered sludge
Fatigue resistance is big.And mechanical dehydration is obviously more efficient, typically there is filtering means dehydration and centrifugal dehydration.Although centrifugal dehydration efficiency
Height, but energy consumption is high, it is easy to wear, height is required to sludge pretreatment, another kind of is in-depth filtration and both surface filtration, but due to sludge
In cotton-shaped, filtering more difficulty, thus very high requirement to also be proposed to pretreatment.
Therefore, the moisture carried in oil refining plant excess sludge is mutually removed in depth with oily, and oil mutually further recycles,
It is the key that reduce sludge land occupation, prevent secondary pollution, resource utilization, development environment friendly economy.
Chinese patent application CN201811139472.X discloses a kind of sludge vacuum drying means, enters after sludge pressurization
In drying machine, heat medium enters in hollow shaft, hollow blade and collet, evaporates wet part in sludge, and dry tail gas enters literary mound
In mixed with the coolant liquid handled through condenser, gas-liquid mixture enters scrubbing tower, while being passed through another burst of coolant liquid and enter and washing
Spray tube in tower is washed, waste water, fixed gas and oily waste water are respectively obtained.But sludge pressurization consumes big energy with heat medium
(eddy flow desiccation and evaporation desiccation energy consumption comparison figure as shown in Fig. 2, eddy flow desiccation temperature at 60 DEG C of optimum temperature, eddy flow desiccation
Energy consumption is only 146.4kJ/kg, and evaporates desiccation energy consumption and be up to 2600kJ/kg), and cooling collect of dry tail gas causes it to take
The heat of the heat medium of band, which dissipates, to be wasted, and the waste water of generation may cause secondary pollution.
U.S. Patent application US 201816057824 discloses a kind of screw press sludge dehydration device, by increasing spiral shell
Line lead angle and shaft section diameter, the strained volume for the sludge that gradually reduces, and internal pressure is improved, final moisture percentage in sewage sludge is by 99%
It is reduced to 80% (weight).But moisture content is still very high after Treatment of Sludge, and dehydration efficiency is low, and device assembly and processing technology
It is required that it is high, it is unfavorable for batch production and field maintenance work.
Therefore, there is an urgent need in the art to develop, efficient one kind, environmental protection, energy conservation, process flow is simple, dewatering is good
Plant excess sludge deep dehydration method and device are refined oil, the minimizing to realize excess sludge is innoxious, with resource utilization
Target, mitigating sludge influences the secondary pollution of environment.
Summary of the invention
Present disclose provides a kind of novel oil refining plant excess sludge dewatering and devices, solve and deposit in the prior art
The problem of.
A technical problem to be solved by this invention is: traditional sludge mechanical dehydration method dehydrating effect is bad, dehydration
Moisture content is still very high after processing, is unfavorable for subsequent transportation, storage and consumption, then energy consumption is high for pyrolysis sludge, and process flow is complicated.
The present invention is dehydrated sludge according to eddy flow field endoparticle high speed rotation phenomenon, cuts sludge high speed rotation and in cyclone
It cuts, overcomes capillary resistance using the centrifugal force that mud granule high speed rotation generates, to realize moisture or oily phase on mud granule
Efficient removal, realize sludge drying, have that low energy consumption, process flow is simple, to the removal efficiency of moisture in sludge or oily phase
High advantage.
Another technical problem to be solved by this invention is: traditional sludge dewatering is limited only to single-stage dehydration,
It is not high to the sorting of single dewatered sludge or the efficiency of separation, so as to be entrained in moisture content low for the high sludge of moisture content
Sludge in be discharged together, cause dewatered moisture percentage in sewage sludge still very high.The present invention is based on the sortings of pulse pneumatic acceleration
Principle makes it generate different acceleration, different fortune using the different densities of different water cut sludge in pulse pneumatic field
Dynamic rail mark and direction of displacement have the efficiency of separation high, dehydration efficiency is high to realize efficiently separating for different water cut sludge
Advantage.
Another technical problem to be solved by this invention is: the high sewage sludge viscosity of moisture content is high, when eddy flow rotation is dehydrated
It is easy viscous wall, and sludge reunion to separate uneven, moisture in internal mud granule when sludge eddy flow rotation dehydration together
Viscosity resistance is big, and dehydration efficiency is low.The present invention is stirred using the higher sludge returning charge of moisture content after sorting with wet mud,
Make the two mutually absorption, reduces the viscosity between wet mud, the sludge after granulation is more likely formed dispersed in cyclone, and surface is wet
Sludge viscosity resistance is smaller, and dehydration efficiency is higher.
On the one hand, present disclose provides a kind of oil refining plant excess sludge dewaterings, method includes the following steps:
(A) oil refining plant excess sludge eddy flow rotation dehydration: gas cyclone rotation is carried out to excess sludge and strengthens dehydration, with de-
Except the moisture carried in excess sludge and oily phase, the desiccation decrement of excess sludge is realized；
(B) dewatered sludge flow acceleration sorts: utilizing the not homogeneity of different water cut sludge obtained in step (A)
Amount, the sludge for keeping moisture content low accelerate the discharge of sorting column top to carry out eddy flow trapping, the high sludge of moisture content with air-flow from air-flow
Being settled down to air-flow accelerates the discharge of sorting column bottom to be mixed, to realize the sorting of different water cut sludge；
(C) the high mud granule returning charge of the moisture content sub-elected in step (B) with after wet mud mixing granulation enter it is next
Secondary eddy flow rotation dehydration；
(D) the low sludge eddy flow rotation of the moisture content sub-elected is dehydrated again and granule capturing: to after sorting in step (B) with
The further eddy flow rotation of sludge with low moisture content of air-flow discharge is strengthened moisture and is mutually removed with oil, while carrying out sludge eddy flow trapping,
To obtain the gas without sludge；And
(E) oil carried in gas obtained in cyclone gas-liquid separation removal step (D) obtains pure mutually with moisture drop
Gas recycles.
In one preferred embodiment, in step (A), it is described oil refining plant excess sludge moisture content be 40%~
90%, oil content is 10%~50%, by weight；The removing of the moisture and oily phase carries out in eddy flow rotation dehydrator,
Wherein, the centrifugal force effect that the rotation of sludge eddy flow generates in eddy flow field and moisture and oily phase in mechanical stripping effect reinforcement sludge
Centrifugation desorption, the discharge of dewatered sludge spin current rotation dehydrator underflow opening, the discharge of gas spin current rotation dehydrator overflow port add
Hot gas temperature is room temperature to 80 DEG C.
In another preferred embodiment, in step (B), the dirt of different water cut obtained in step (A) is utilized
The different quality of mud makes whole pulsation direction of displacement of the different water cut sludge in pulse pneumatic field generate difference, gas of pulsing
Flow flow in just, the pulsation of cosine waveform period, the sludge that pulse pneumatic keeps moisture content low the accumulation of the acceleration effect of sludge is with gas
Stream accelerates sorting column top to enter eddy flow trap from air-flow, the high sludge settling of moisture content to air-flow accelerate sorting column bottom into
Enter mixing agitator, to realize the sorting of different water cut sludge.
In another preferred embodiment, it in step (C), is sub-elected in original residual sludge and step (B)
The high sludge agitation mixing of moisture content, the two mutually adsorb form graininess after into the dehydration of eddy flow rotation next time.
In another preferred embodiment, in step (D), using the cyclonic separation dirt low to moisture content in gas phase
Mud carries out separation and collection, and separation factor is thousands of times of gravitational settling, it is ensured that does not carry sludge after separation in gas phase secretly, simultaneously
Further strengthen moisture using the eddy flow rotation of sludge mutually to remove with oil.
On the other hand, present disclose provides a kind of oil refining plant excess sludge dehydration device, which includes:
Eddy flow rotation dehydrator, for carry out step (A) oil refining the rotation of plant excess sludge eddy flow dehydration: to excess sludge into
Dehydration is strengthened in row gas cyclone rotation, to remove the moisture carried in excess sludge and oily phase, realizes that the desiccation of excess sludge subtracts
Amount；
The air-flow connecting with eddy flow rotation dehydrator accelerates sorting column, accelerates for carrying out step (B) dewatered sludge air-flow
Degree sorting: using the different quality of different water cut sludge obtained in step (A), the sludge for keeping moisture content low is with air-flow from gas
Stream accelerate sorting column top discharge carry out eddy flow trapping, the high sludge settling of moisture content to air-flow accelerate sorting column bottom be discharged into
Row is mixed, to realize the sorting of different water cut sludge；
It is placed in air-flow and accelerates eddy flow trap in sorting column, for carrying out the low dirt of moisture content that step (D) sub-elects
The rotation of mud eddy flow is dehydrated again and granule capturing: further revolving to after sorting in step (B) with the sludge with low moisture content of air-flow discharge
It flows rotation and strengthens moisture and oil mutually removing, while carrying out sludge eddy flow trapping, to obtain the gas without sludge；
The gas-liquid separation tower being connect with eddy flow trap, for carrying out in step (E) cyclone gas-liquid separation removal step (D)
The oil carried in obtained gas obtains clean gas and recycles mutually with moisture drop；And
The mixing agitator for accelerating sorting column to connect with air-flow, is used for the sludge high to moisture content obtained in step (B)
It is mixed.
In one preferred embodiment, described device further includes the pipeline heating connecting with eddy flow rotation dehydrator
Device, for eddy flow rotation dehydrator inlet gas to be heated to room temperature to 80 DEG C；And the pulsation gas being connect with pipeline heater
Flow-generator, for generating the pulse pneumatic of sine and cosine waveform, ripple frequency is the Hz of 1.5Hz~2.5, and maximum tolerance meets gas
Stream accelerate sorting column in maximum air velocity between the high sludge termin al velocity degree of the low sludge of moisture content and moisture content it
Between.
In another preferred embodiment, the eddy flow trap is cyclone separator, to take in strengthening airflow
The sludge eddy flow rotation of band is dehydrated again traps process with cyclonic separation, obtains the gas without sludge.
In another preferred embodiment, the gas-liquid separation tower is equipped with top tray, gas-liquid cyclone separator and air inlet
Equal stringing removes the drop of carrying under eddy flow trapping effect after inlet gas is uniformly distributed, droplet settling to outlet at bottom is collected, and takes off
Except the gas after drop recycles.
In another preferred embodiment, the mixing agitator, eddy flow rotation dehydrator, air-flow accelerate sorting column
Can be in parallel with eddy flow trap, quantity in parallel is determined according to treatment scale, can is two or more groups, finally be revolved by afterbody
The tail gas for flowing trap discharge removes the moisture and oily phase that gas carries, clean gas circulation benefit by gas-liquid separation tower eddy flow
With.
The utility model has the advantages that
The major advantage of methods and apparatus of the present invention is:
(1) high shear and the mechanical stripping effect that are subject in eddy flow field using sludge and mud granule from
High speed rotation in eddy flow field, the centrifugation removing of moisture or oily phase in reinforcement sludge accelerate in sludge moisture or oil mutually and heating
The renewal rate of gas reduces sludge volume and quality, realizes the decrement of sludge to strengthen dehydration and dehydration efficiency.
(2) make it in pulse pneumatic using the different densities of different water cut sludge based on flow acceleration grading principle
Whole pulsation direction of displacement in generates difference, to realize the efficient separation of different water cut sludge, process is simple, operation
Convenient, operating cost is low, and will not generate secondary pollution.
(3) it is stirred using the higher sludge returning charge of moisture content after sorting with wet mud, makes the two mutually absorption, drop
Viscosity between low humidity sludge, the sludge after granulation are more likely formed dispersed in cyclone, and surface wet mud viscosity resistance is smaller,
Be conducive to improve dehydration efficiency.
(4) higher compared to other mechanical dehydration mode dehydration efficiencies, compared to drying equipment, then energy consumption is relatively lower.
Detailed description of the invention
Attached drawing is provided for a further understanding of the present invention, it simply forms a part of this specification with into one
Step explains the present invention, is not construed as limiting the invention.
Fig. 1 is the oil refining plant excess sludge Deep dehydration technique flow chart of a preferred embodiment according to the present invention.
Fig. 2 is the desiccation of sludge eddy flow and evaporation desiccation energy consumption comparison figure.
Specific embodiment
Present inventor has found afterwards after extensive and in-depth study, the moisture in sludge be largely Interstitial Water and
Capillary water, Interstitial Water account for about sludge water content 70% (weight) left and right, and capillary water accounts for about 20% (weight) left and right, and traditional filtering is de-
Water and centrifugal dehydration are only capable of removing a part of Interstitial Water；Since mud granule velocity of rotation is inadequate, the moisture between sludge is difficult to obtain
Enough to centrifugal force to remove Interstitial Water completely be aqueous/low reason of oily sludge dehydration efficiency；And in eddy flow field, by
It, can be by the rotational velocity for being up to 20000~60000 rpms, so that sludge in the rotation phenomenon of eddy flow field endoparticle
Particle internal moisture obtains the centrifugal force for overcoming viscosity resistance enough, to remove from sludge gap；
The moisture content of sludge not all mud granule after cyclone is dehydrated meets technique requirement, but there are portions
Moisture percentage in sewage sludge is divided to reach technique requirement, and remainder moisture percentage in sewage sludge is still higher；To improve dehydration efficiency, need to consider
The sludge that not up to technique requires is sorted out into further deep dehydration；In same pulse pneumatic field, due to sludge weight
The synergistic effect for the additional force that power, aerostatic buoyancy, drag force and pulse pneumatic generate sludge, so that the lesser low-water-content of density
Sludge obtains upward acceleration and tends to rise from the discharge of sorting column top, conversely, the biggish high water content sludge of density obtains
It obtains acceleration on the contrary and tends to sedimentation from the discharge of sorting column lower part；The moisture of mud granule can also in pulse pneumatic field simultaneously
Further to remove, mud granule does periodic accelerated motion under the action of pulse pneumatic, the moisture in sludge gap due to
Inertia force is acted on and is further removed；
The high sewage sludge viscosity of moisture content is high, viscous wall is easy when eddy flow rotation is dehydrated, and sludge reunion makes sludge together
Separation is uneven when eddy flow rotation is dehydrated, and moisture viscosity resistance is big in internal mud granule, and dehydration efficiency is low, after sorting
The higher sludge returning charge of moisture content is stirred with wet mud, is made the two mutually absorption, the viscosity between wet mud is reduced, after granulation
Sludge dispersed is more likely formed in cyclone, surface wet mud viscosity resistance is smaller, be conducive to improve dehydration efficiency.
Based on the studies above and discovery, the application develops a kind of method and dress for refining oil plant excess sludge deep dehydration
Set, have process flow it is simple, low energy consumption, dehydration and the efficiency of separation it is high the advantages that, deposited in the prior art to efficiently solve
The problem of.
In the disclosure in a first aspect, providing a kind of oil refining plant excess sludge dewatering, this method includes following step
It is rapid:
(A) oil refining plant excess sludge eddy flow rotation dehydration: gas cyclone rotation is carried out to excess sludge and strengthens dehydration, is utilized
The centrifugal force effect and mechanical stripping that the high speed rotation of sludge generates in eddy flow field act on moisture and oily phase in reinforcement sludge
Desorption process removes the moisture carried in excess sludge and oily phase, realizes the desiccation decrement of excess sludge；
(B) dewatered sludge flow acceleration sorts: using the different quality of different water cut sludge, making it in pulse pneumatic
Whole pulsation direction of displacement in generates difference, the sludge that pulse pneumatic keeps moisture content low the accumulation of the acceleration effect of sludge with
Air-flow accelerates sorting column top to enter in eddy flow trap from air-flow, and the high sludge settling of moisture content to air-flow accelerates sorting column bottom
Portion enters mixing agitator, to realize the efficient separation of different water cut sludge；
(C) after sub-electing the higher mud granule returning charge of moisture content and wet mud mixing granulation, the water in wet mud is absorbed
Point, remaining wet mud viscosity is reduced, glues wall into reducing in the dehydration of eddy flow rotation next time, while convenient for sludge dispersion rotation
Rotation dehydration is flowed, dehydration efficiency is improved；
(D) the lower sludge eddy flow rotation of moisture content is sub-elected to be dehydrated again and granule capturing: to after sorting with air-flow discharge
The further eddy flow rotation of sludge with low moisture content is strengthened moisture and is mutually removed with oil, while carrying out sludge eddy flow trapping, to be free of
The gas of sludge；And
(E) oil carried in cyclone gas-liquid separation removal gas obtains clean gas and recycles mutually with moisture drop.
In the disclosure, in step (A), the oil refining plant excess sludge moisture content is 40%~90%, and oil content is
10%~50%, by weight.
In the disclosure, in step (A), moisture or oil mutually removing in gas-solid cyclone (eddy flow rotation dehydrator) into
Row, sludge high-speed rotational rotation make moisture or oil in sludge mutually be centrifuged desorption, the discharge of dewatered sludge spin current device underflow opening, gas
The discharge of spin current device overflow port, heat gas temperatures are room temperature to 80 DEG C, and preferably room temperature is to 60 DEG C, and more preferable room temperature is to 40 DEG C.
In the disclosure, in step (B), the pulse pneumatic flow in just, the cosine waveform period pulsation, based on pulsation
Flow acceleration grading principle: the sludge of different water cut has different quality, adds in pulse pneumatic field with different
Speed, to have different motion profile and direction of displacement, the sludge for keeping moisture content different is efficiently separated, the low dirt of moisture content
Mud accelerates sorting column top to enter the trapping of next stage eddy flow with air-flow from air-flow, and the high sludge settling of moisture content to air-flow accelerates to divide
Column bottom and wet mud mixing granulation is selected to enter the dehydration of eddy flow rotation next time.
In the disclosure, in step (C), original residual sludge and the higher sludge agitation of the moisture content sub-elected are mixed
Close, the two mutually adsorb form graininess after with level-one eddy flow rotation dewatering inlet gas entrance drying process next time.
In the disclosure, it in step (D), is carried out using sludge of the efficient cyclonic separation to low-water-content in gas phase
Separation and collection, separation factor are thousands of times of gravitational settling, it is ensured that do not carry sludge after separation in gas phase secretly, while utilizing dirt
High speed rotation of the mud in cyclone is further strengthened moisture and is mutually removed with oil.
In the second aspect of the disclosure, a kind of oil refining plant excess sludge dehydration device is provided, which includes:
Eddy flow rotation dehydrator, for carrying out the step (A)；
The air-flow connecting with eddy flow rotation dehydrator accelerates sorting column, for carrying out the step (B)；
It is placed in air-flow to accelerate to sort the eddy flow trap in column, for carrying out the step (D)；
The gas-liquid separation tower being connect with eddy flow trap, for carrying out the step (E)；And
The mixing agitator for accelerating sorting column to connect with air-flow, is used for the sludge high to moisture content obtained in step (B)
It is mixed.
In the disclosure, described device further includes the pipeline heater connecting with eddy flow rotation dehydrator, is used for eddy flow
Rotation dehydrator inlet gas is heated to room temperature to 80 DEG C, and preferably room temperature is to 60 DEG C, and more preferable room temperature is to 40 DEG C.
In the disclosure, described device further includes the pulsating airflow generator connecting with pipeline heater, for generating just
The pulse pneumatic of cosine waveform, ripple frequency are 1.5Hz~2.5Hz, and maximum tolerance meets air-flow and accelerates most atmosphere in sorting column
Flow velocity degree is between the high sludge termin al velocity degree of the low sludge of moisture content and moisture content.Under pulse pneumatic impact,
The big high water content sludge negative sense displacement (being positive upwards) of quality is greater than positive-displacement, and pulsation global displacement is negative, moves downward；
The small sludge with low moisture content positive-displacement of quality is displaced greater than negative sense, and pulsation global displacement is positive, and is moved upwards.
In the disclosure, the eddy flow trap is cyclone separator, to the sludge eddy flow that is carried in strengthening airflow from
Turn to be dehydrated again and trap process with cyclonic separation, to obtain the gas without sludge.
In the disclosure, the gas-liquid separation tower is equipped with top tray, gas-liquid cyclone separator and the equal stringing of air inlet, inlet gas
The drop of carrying is removed after uniformly distributed under eddy flow trapping effect, droplet settling to outlet at bottom is collected, the gas after removing drop
It recycles.
In the disclosure, the mixing agitator, eddy flow rotation dehydrator, air-flow accelerate sorting column and eddy flow trap to remove
Single group uses outside can also be in parallel, and quantity in parallel can be determined according to treatment scale, and it can be two groups or more that number is organized in parallel connection, finally by most
The tail gas of rear stage eddy flow trap discharge removes the moisture and oily phase, clean gas that gas carries by gas-liquid separation tower eddy flow
It recycles.
Below referring to attached drawing.
Fig. 1 is the oil refining plant excess sludge Deep dehydration technique flow chart of a preferred embodiment according to the present invention.
As shown in Figure 1,1 regulation device inlet Nitrogen gas flow of pulsating airflow generator in just, the variation of cosine function pulsating waveform, pipeline adds
Pulse pneumatic is heated to room temperature to 80 DEG C by hot device 2, carrier gas circulation, in eddy flow rotation dehydrator 4, to refinery's excess sludge into
Row heat gas eddy flow rotation dehydration, utilizes moisture and oil in the high speed rotation reinforcement sludge gap of sludge in eddy flow field and capillary
The desorption process of phase, the moisture and oily phase that removing sludge carries, the dewatered sludge of eddy flow rotation enter air-flow with air-flow and accelerate
It sorts in column 5；Accelerate, using the different densities of different water cut sludge, to make it in pulse pneumatic field in sorting column 5 in air-flow
Whole pulsation direction of displacement generate difference, the sludge that pulse pneumatic keeps moisture content low the accumulation of the acceleration effect of sludge is with air-flow
Enter in eddy flow trap 6 from top, the high sludge settling of moisture content to bottom is discharged, and dewatered sludge is obtained, to realize not
With the efficient separation of water content sludge；The high sludge returning charge of moisture content enters wet with excess sludge in mixing blender 3 after sorting
Sludge mixing, the two mutually adsorb form graininess after into the dehydration of eddy flow rotation next time；In eddy flow trap 6,
Strengthen moisture to the further eddy flow rotation of the sludge with low moisture content being discharged after sorting with air-flow mutually to remove with oil, while carrying out sludge
Eddy flow trapping, efficiently separates sludge with gas, is discharged with obtaining the gas without sludge, the gas in final eddy flow trap 6
Body carries moisture or oil phase drop enters in gas-liquid separation tower 7；In gas-liquid separation tower 7, pass through the gas after trapping to eddy flow
The oil phase and moisture carried in eddy flow removing gas, obtains clean gas and recycles, the drop of discharge is collected；Wherein, described
Mixing agitator, eddy flow rotation dehydrator, air-flow accelerate sorting column and eddy flow trap can be in parallel multistage.
Fig. 2 is the desiccation of sludge eddy flow and evaporation desiccation energy consumption comparison figure.As shown in Fig. 2, realizing dehydration and drying by evaporation
Technique (evaporation desiccation), need temperature to be higher than the boiling point of water, water is undergone phase transition in evaporation process, and (vaporization is latent for phase transformation energy consumption
Heat) 2260KJ/Kg；Dehydration and drying (eddy flow desiccation) is realized by eddy flow rotation-revolution coupled oscillations, water does not generate phase transformation,
At 60 DEG C, energy consumption 146.6KJ/Kg, greatly reduce desiccation energy consumption (eddy flow desiccation temperature at 60 DEG C of optimum temperature, eddy flow
Desiccation energy consumption is only 146.4kJ/kg, and evaporates desiccation energy consumption and be up to 2600kJ/kg).
Embodiment
Below with reference to specific embodiment, the present invention is further explained.It should be appreciated, however, that these embodiments are only used for
It is bright the present invention and be not meant to limit the scope of the invention.The test method of actual conditions is not specified in the following example, usually
According to normal conditions, or according to the normal condition proposed by manufacturer.Unless otherwise indicated, all percentage and number be by weight
Meter.
Embodiment 1:
In an oil refining plant excess sludge deep dehydrator, excess sludge is carried out according to the method for the present invention and device
Deep dehydration, specific operation and effect are described as follows:
1. excess sludge property
Excess sludge used is derived from the excess sludge of Shanghai Secco Petrochemical Co., Ltd., the biochemistry of match section petrochemical industry
For excess sludge after centrifuge is dehydrated, moisture content still has 90.9 weight %, and average grain diameter is 13.1 μm, excess sludge property
As shown in table 1 below.
Table 1: water-containing sludge property
2. implementation process
Implement referring to the method for the present invention, specific as follows:
Material is water-containing sludge, sludge eddy flow rotation dehydration and the sorting of sludge with low moisture content flow acceleration in the present embodiment
Middle gas selects air.
(1) pulsating airflow generator regulation device inlet gas flow rate in just, the variation of cosine function pulsating waveform, pipeline adds
Hot device heats pulse pneumatic, and heating temperature successively takes 40,50,60,70,80 DEG C of five groups of temperature in experiment, gradually finds best
Temperature carries out the rotation of heat gas eddy flow to aqueous/oily sludge and strengthens dehydration, utilize eddy flow in eddy flow rotation dehydrator
In in the high speed rotation reinforcement sludge gap of sludge and capillary moisture and oily phase desorption process, the moisture that removing sludge carries
After oily phase, sludge enters air-flow with air-flow and accelerates in sorting column.
(2) accelerate, using the different densities of different water cut sludge, to make it in pulse pneumatic field in sorting column in air-flow
Whole pulsation direction of displacement generate difference, the sludge that pulse pneumatic keeps moisture content low the accumulation of the acceleration effect of sludge is with air-flow
Enter in eddy flow trap from top with air-flow, the high sludge settling of moisture content to bottom is discharged, to realize different water cut
The efficient separation of sludge.
(3) in eddy flow trap, the further eddy flow rotation of the sludge with low moisture content being discharged after sorting with air-flow is strengthened
Moisture is mutually removed with oil, while carrying out sludge eddy flow trapping, and sludge is efficiently separated with gas, to obtain the gas without sludge,
Gas carries moisture or oil phase drop enters in gas-liquid separation tower.
(4) in gas-liquid separation tower, the moisture carried in gas and oily phase is removed by gas-liquid cyclone separator, obtain pure gas
Body circulation utilizes.
3. implementation result
By carrying out eddy flow rotation dehydration under different gas flow temperatures, technical effect is as shown in following table 2-3, in 40 DEG C of gas
At a temperature of stream, sludge can be reduced to 34.9%, by weight, low temperature from 90.9% by the dewatered moisture content of eddy flow rotation
Under dehydration efficiency demonstrate eddy flow rotation dehydration realized in a manner of non-phase transformation moisture content in sludge wadding body duct centrifugation it is de-
Attached, under 80 DEG C of gas flow temperature, sludge can be reduced to 10.98 weight % by the dewatered moisture content of eddy flow rotation, can
Realize outlet mud decrement 88%, 60 DEG C are the experiment separative efficiency inflection point, and separative efficiency promotes maximum, separates when compared to 50 DEG C
Improved efficiency 1/5, therefore 60 DEG C are optimum temperature.The sludge comparison of eddy flow rotation dehydration front and back, dehydrated sludge is transformed into dry
Dry, hard sludge bulky grain, sludge fine powder can be broken by being pinched with hand one.The energy consumption of this technology processing is 34.6Kwh/t dirty
Mud, energy consumption are about existing 1/5 handled by evaporative phase-change mode.
Table 2: column bottom is sorted under different temperatures and exports moisture percentage in sewage sludge
Table 3: eddy flow trap underflow opening moisture percentage in sewage sludge under different temperatures
The operating cost of technique can be effectively reduced in the implementation of the technology, economize on resources, and protect environment, and meet environmental protection industry (epi)
The sludge treatment target of " low minimizing, innoxious, stabilisation, recycling ".
Above-mentioned listed embodiment is only presently preferred embodiments of the present invention, implementation model not for the purpose of limiting the invention
It encloses.Equivalence changes and modification made by the content of i.e. all claims according to the present invention, all should be technology model of the invention
Farmland.
All references mentioned in the present invention is incorporated herein by reference, independent just as each document
It is incorporated as with reference to such.In addition, it should also be understood that, after reading the above teachings of the present invention, those skilled in the art can
To make various changes or modifications to the present invention, such equivalent forms equally fall within model defined by the application the appended claims
It encloses.
Claims (10)
1. a kind of oil refining plant excess sludge dewatering, method includes the following steps:
(A) oil refining plant excess sludge eddy flow rotation dehydration: carrying out gas cyclone rotation to excess sludge and strengthen dehydration, surplus to remove
The moisture carried in remaining sludge and oily phase realize the desiccation decrement of excess sludge；
(B) dewatered sludge flow acceleration sorts: using the different quality of different water cut sludge obtained in step (A), making
The low sludge of moisture content accelerates the discharge of sorting column top to carry out eddy flow trapping with air-flow from air-flow, and the high sludge settling of moisture content is extremely
Air-flow accelerates the discharge of sorting column bottom to be mixed, to realize the sorting of different water cut sludge；
(C) the high mud granule returning charge of the moisture content sub-elected in step (B) is next time revolved with entering after wet mud mixing granulation
Flow rotation dehydration；
(D) the low sludge eddy flow rotation of the moisture content sub-elected is dehydrated again and granule capturing: to after sorting in step (B) with air-flow
The further eddy flow rotation of the sludge with low moisture content of discharge is strengthened moisture and is mutually removed with oil, while carrying out sludge eddy flow trapping, with
To the gas for being free of sludge；And
(E) oil carried in gas obtained in cyclone gas-liquid separation removal step (D) obtains clean gas mutually with moisture drop
It recycles.
2. the method as described in claim 1, which is characterized in that in step (A), the moisture content of the oil refining plant excess sludge
It is 40%~90%, oil content is 10%~50%, by weight；The removing of the moisture and oily phase is in eddy flow rotation dehydrator
Middle progress, wherein the water in centrifugal force effect and mechanical stripping effect reinforcement sludge that the rotation of sludge eddy flow generates in eddy flow field
Divide and is mutually centrifuged desorption, the discharge of dewatered sludge spin current rotation dehydrator underflow opening, gas spin current rotation dehydrator overflow with oil
Mouth discharge, heat gas temperatures are room temperature to 80 DEG C.
3. the method as described in claim 1, which is characterized in that in step (B), contained using difference obtained in step (A)
The different quality of water rate sludge makes whole pulsation direction of displacement of the different water cut sludge in pulse pneumatic field generate difference,
Pulse pneumatic flow in just, the pulsation of cosine waveform period, pulse pneumatic accumulates the dirt for keeping moisture content low to the acceleration effect of sludge
Mud accelerates sorting column top to enter eddy flow trap with air-flow from air-flow, and the high sludge settling of moisture content to air-flow accelerates sorting column
Bottom enters mixing agitator, to realize the sorting of different water cut sludge.
4. the method as described in claim 1, which is characterized in that in step (C), divide in original residual sludge and step (B)
The moisture content selected it is high sludge agitation mixing, the two mutually adsorb form graininess after into eddy flow rotation next time it is dehydrated
Journey.
5. the method as described in claim 1, which is characterized in that in step (D), using cyclonic separation to moisture content in gas phase
Low sludge carries out separation and collection, and separation factor is thousands of times of gravitational settling, it is ensured that does not carry dirt after separation in gas phase secretly
Mud, while further strengthening moisture using the eddy flow rotation of sludge and mutually being removed with oil.
6. a kind of oil refining plant excess sludge dehydration device, the device include:
Eddy flow rotation dehydrator (4), for carry out step (A) oil refining the rotation of plant excess sludge eddy flow dehydration: to excess sludge into
Dehydration is strengthened in row gas cyclone rotation, to remove the moisture carried in excess sludge and oily phase, realizes that the desiccation of excess sludge subtracts
Amount；
The air-flow connecting with eddy flow rotation dehydrator (4) accelerates sorting column (5), adds for carrying out step (B) dewatered sludge air-flow
Velocity sorting: using the different quality of different water cut sludge obtained in step (A), the sludge for keeping moisture content low with air-flow from
Air-flow accelerates the discharge of sorting column top to carry out eddy flow trapping, and the high sludge settling of moisture content to air-flow accelerates sorting column bottom to be discharged
It is mixed, to realize the sorting of different water cut sludge；
Air-flow is placed in accelerate to sort the eddy flow trap (6) in column (5), it is low for carrying out the moisture content that step (D) sub-elects
The rotation of sludge eddy flow is dehydrated again and granule capturing: further to the sludge with low moisture content after sorting in step (B) with air-flow discharge
Eddy flow rotation is strengthened moisture and is mutually removed with oil, while carrying out sludge eddy flow trapping, to obtain the gas without sludge；
The gas-liquid separation tower (7) being connect with eddy flow trap (6), for carrying out step (E) cyclone gas-liquid separation removal step (D)
Obtained in the oil that carries in gas mutually and moisture drop, obtain clean gas and recycle；And
The mixing agitator (3) for accelerating sorting column (5) to connect with air-flow is used for the dirt high to moisture content obtained in step (B)
Mud is mixed.
7. device as claimed in claim 6, which is characterized in that described device further includes connecting with eddy flow rotation dehydrator (4)
Pipeline heater (2), for eddy flow rotation dehydrator (4) inlet gas to be heated to room temperature to 80 DEG C；And add with pipeline
The pulsating airflow generator (1) of hot device (2) connection, for generating the pulse pneumatic of sine and cosine waveform, ripple frequency be 1.5Hz~
2.5Hz, maximum tolerance meet air-flow and accelerate maximum air velocity in sorting column high between the low sludge of moisture content and moisture content
Between sludge termin al velocity degree.
8. device as claimed in claims 6 or 7, which is characterized in that the eddy flow trap (6) is cyclone separator, to
The sludge eddy flow rotation carried in strengthening airflow is dehydrated again traps process with cyclonic separation, obtains the gas without sludge.
9. device as claimed in claims 6 or 7, which is characterized in that the gas-liquid separation tower (7) is equipped with top tray, gas-liquid
Cyclone and air inlet equal stringing remove the drop of carrying, the droplet settling bottom of under eddy flow trapping effect after inlet gas is uniformly distributed
Portion is collected outlet, and the gas after removing drop recycles.
10. device as claimed in claims 6 or 7, which is characterized in that the mixing agitator (3), eddy flow rotation dehydrator
(4), air-flow accelerates sorting column (5) and eddy flow trap (6) can be in parallel, and quantity in parallel is determined according to treatment scale, can be two groups
Or more group, finally by afterbody eddy flow trap discharge tail gas by gas-liquid separation tower eddy flow remove gas carry water
Divide and is recycled with oily phase, clean gas.
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| CN201910549483.3A CN110194576A (en) | 2019-06-24 | 2019-06-24 | Refine oil plant excess sludge dewatering and device |
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| CN201910549483.3A CN110194576A (en) | 2019-06-24 | 2019-06-24 | Refine oil plant excess sludge dewatering and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113636737A (en) * | 2021-09-06 | 2021-11-12 | 华东理工大学 | Residual sludge dewatering and drying method and device |
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