CN106809936A - De-oiling system and method for deoiling are cleaned in a kind of hot rolling horizontal flow basin air supporting - Google Patents
De-oiling system and method for deoiling are cleaned in a kind of hot rolling horizontal flow basin air supporting Download PDFInfo
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- CN106809936A CN106809936A CN201510870457.2A CN201510870457A CN106809936A CN 106809936 A CN106809936 A CN 106809936A CN 201510870457 A CN201510870457 A CN 201510870457A CN 106809936 A CN106809936 A CN 106809936A
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Abstract
The present invention discloses a kind of hot rolling horizontal flow basin air supporting cleaning de-oiling system, including the downflow weir and oil baffle of horizontal flow basin side, the oil skimming machine on top and Oil and slag scraping machine, the bucket with waterwall and bottom of opposite side；In horizontal flow basin water inlet and with setting agitator between waterwall；With dissolved air water release is respectively provided between waterwall and agitator and in horizontal flow basin, dissolved air water release connection air-dissolving apparatus, air-dissolving apparatus are provided with air compressor and centrifugal pump；Set up whirling well to be connected with horizontal flow basin entrance, and chemicals dosing plant is set above whirling well.
Description
Technical field
Field, more particularly to a kind of hot rolling horizontal flow basin gas are utilized the invention belongs to iron and steel enterprise's solid waste
Floating cleaning de-oiling system and method for deoiling.
Background technology
Substantial amounts of lubricating oil, lubricating grease, gear oil are consumed during iron and steel enterprise's steel hot rolling
And hydraulic oil, a portion is leaked in turbid circulating water system, its iron oxide peeled off with steel
Skin, whirling well is imported after pouring trench by turbid circulating water, after being precipitated through whirling well, coarse granule iron sheet
Periodically pulled out, can directly be utilized as raw materials for sintering because its oil content is relatively low, but fine grained
Iron sheet brings horizontal flow basin into by water, and fine grained iron sheet surface has oil film, this part iron sheet and part
Suspension is caught after being precipitated through horizontal flow basin by grab bucket, as hot rolling greasy filth.This hot rolling greasy filth contains
Oil cut rate is higher, and oil content is generally 5~28% (mass ratioes) after dehydration, and all iron content is generally
65~70% (mass ratioes), iron cellulose content is higher than Iron concentrate, is worth with recycling very high,
But oil smoke can be produced when being calcined without the hot rolling greasy filth for deoiling, the smell pollution environment of oil smoke is simultaneously tight
Health Status For Workers Exposed is endangered again, and Environmental Protection in China regulation does not allow this oil-containing material straight without deoiling
Connect and use.As certain large-scale annual hot rolling greasy filth yield of steel production enterprise reaches tens thousand of tons, store up not
Only occupy very big stock ground, but also severe contamination environment.Domestic and international iron and steel enterprise and research are single
Position has carried out many researchs to the Application way of hot rolling greasy filth, but invest small, processing cost it is low,
The technology of processing procedure environmental protection does not almost have also.Hot rolling greasy filth processing method traditional at present is such as
Under：
(1) roasting method：Greasy filth is calcined in shaft furnace or rotary kiln, although the method
The oil that can be gone in greasy filth, but the substantial amounts of energy is consumed, the oil smoke meeting produced in production process
Heavier secondary pollution is caused to air.(2) thermal reduction：Reducing agent and greasy filth are mixed
Tinning, heats production reduced iron powder in tunnel cave, and the method high energy consumption, input and output are compared
It is small.(3) way of distillation：Thermal dehydration is first carried out to greasy filth, then is heated in sealing device and is made
Oil in greasy filth evaporates to form deep fat cigarette, and being formed after the cold oil cooling that the flue gas is sprayed can
The waste oil of recovery, the iron scale after deoiling is utilized as raw materials for sintering.The method is deoiled complex process,
Equipment investment is higher.(4) vacuum method：United States Patent (USP) (US5964045) is proposed to rotary kiln
In be passed through 250 DEG C of heat smokes dehydration be dried to greasy filth, then set using two sections of vacuum drying
It is standby that vacuum de-oiling is carried out to greasy filth under the conditions of 300 DEG C.The method easily makes waste oil and water simultaneously
Evaporation, causes waste oil to bond deduster, the operation of influence deduster and reduction dust removing effects, vacuum
De-oiling increased production cost.(5) thermal cleaning method：Will hot rolling greasy filth, alkaline cleaner and
Water is heated to 70~90 DEG C, after stirring certain hour in agitated kettle, and the oil in greasy filth is in machinery
Floated on liquid level in the presence of power and chemical force, waste oil is sold to oil refining after oil spilling groove is collected
Factory.The shortcoming of the method is that high energy consumption, cleaning agent consumption be big, high cost of deoiling.(6) often
Warm ablution：Cheng Xiufang was in the 3rd phase in 2006《Corrosion science and guard technology》Deliver and " roll
The development of steel squama degreaser " paper, it has been reported that clean steel rolling greasy filth with normal temperature degreaser, should
Not only degreaser is relatively costly for method, also produce the substantial amounts of waste water to need further to carry out at sewage
Reason, more increased oil-sludge treatment cost.
The content of the invention
For drawbacks described above, the present invention provide a kind of hot rolling horizontal flow basin air supporting cleaning de-oiling system and
Method of deoiling is stirred air supporting to the hot rolling horizontal flow basin muddy water of oil-containing by horizontal flow basin water
The method being combined with dosing cleaning removes the oil content in the oil content and water on thin iron scale surface and hangs
Suspension in water is floated over, so as to reach the purpose of oil in greasy filth, iron scale can after making to deoil
Utilized as raw materials for sintering, the waste oil of recovery is sold to oil plant, while improve turbid circulating water water quality,
Reduce filtrate consumption and extension filtering tank time between overhauls(TBO).
The present invention is realized by the following method：
De-oiling system is cleaned in a kind of hot rolling horizontal flow basin air supporting, including horizontal flow basin side downflow weir and
The bucket with waterwall and bottom of oil baffle, the oil skimming machine on top and Oil and slag scraping machine, opposite side；
It is characterized in that：In horizontal flow basin water inlet and with setting agitator between waterwall；With waterwall with
Dissolved air water release is respectively provided between agitator and in horizontal flow basin, the connection of dissolved air water release is molten
Device of air, air-dissolving apparatus are provided with air compressor and centrifugal pump；Set up whirling well and by pipeline
It is connected with horizontal flow basin entrance, and chemicals dosing plant is set above whirling well.
The method of deoiling of de-oiling system is cleaned in a kind of hot rolling horizontal flow basin air supporting, it is characterised in that：Adding
Be added to cleaning agent in whirling well by medicine device；Cleaning agent is anion-polyacrylamide
The mixture of PAM and water；Thin iron of the cleaning agent with oil-containing in whirling well and surface with oil film
Squama chemically reacts, and greasy dirt is cleaned agent and takes liquid level to；Whirling well precipitates coarse granule iron scale
Pulled out afterwards, the thin iron scale and suspended contamination of surface attachment oil film take horizontal flow basin to together by water
Water inlet；Pass through water distribution after the agitated machine stirring of the thin iron scale of oil and surface with oil film in muddy water
Wall blasthole enters in horizontal flow basin, and stirring can make the oil film part on thin iron scale surface enter shape in water
Into the oil droplet for suspending；The pressure that the part water and air compressor that centrifugal pump overflows downflow weir is produced
Power air enters air-dissolving apparatus and forms the dissolved air water containing microbubble together；Water oil droplet passes through
The microbubble that the dissolved air release being laid in water is produced is by floating to advection pool surface, liquid level
On oil scraped between oil baffle and downflow weir by the upper scraping plate of Oil and slag scraping machine again, waste oil is by skimming
Oil machine is collected into storage tank；Thin iron scale is by Oil and slag scraping machine after being deposited to the deoiling of horizontal flow basin bottom
Lower scraping plate pushes bucket；Air supporting parameter includes：Inspiratory capacity, reflux ratio, gas liquid ratio and gas pressure
Power, each state modulator scope is as follows：Inspiratory capacity：0.3L/(m3Shui ﹒ min)~0.7L/ (m3Water
﹒ min), reflux ratio：10%~25%, gas liquid ratio：1.0%~2.5%, gas pressure：0.4MPa
~0.8MPa.
The oil content for making thin iron scale surface in water by stirring is peeled off into water, and stirring is also extended
Iron scale sinking time, it is ensured that the oil on thin iron scale surface fully can be stripped in water, to reach
Greasy filth effect of deoiling creates conditions.
It is worth mentioning that dissolved air water release set location in horizontal flow basin otherwise influence frizing
The target of Slag Scraping Device bottom scrapes mud.
Beneficial effects of the present invention：Transformed using built horizontal flow basin, it is special without building
Oil-sludge treatment production line, operating cost of reducing investment outlay, low cost of deoiling.Gone using wet method
Oily technique, process of deoiling environmental protection, any secondary pollution is not produced.For the muddy water containing Chuck Steak
Only needing a small amount of cleaning agent can make the oil in greasy filth by the method for stirring, air supporting and cleaning
Separated with iron scale, the iron scale after deoiling can directly be used as raw materials for sintering, the waste oil of recovery is sold
To oil refining enterprise.Steel production enterprise greasy filth is turned waste into wealth, is that enterprise brings considerable environment
Benefit and social benefit.
Brief description of the drawings
Fig. 1 is a kind of hot rolling horizontal flow basin air supporting cleaning de-oiling system schematic diagram of the invention.
In figure：The Oil and slag scraping machine 5 of 1 downflow weir, 2 oil baffle, 3 oil skimming machine 4 is stirred with waterwall 6
Mix the bucket of 10 air-dissolving apparatus of machine 7 dissolved air release, 8 air compressor, 9 centrifugal pump 11
The chemicals dosing plant of 12 whirling well 13.
Specific embodiment
Embodiments of the invention are described in detail below in conjunction with the accompanying drawings.
As shown in Figure 1：De-oiling system, including horizontal flow basin one are cleaned in a kind of hot rolling horizontal flow basin air supporting
The downflow weir 1 of side and the oil skimming machine 3 of oil baffle 2, top and Oil and slag scraping machine 4, opposite side
The bucket 11 with waterwall 5 and bottom；In horizontal flow basin water inlet and with setting between waterwall 5
Agitator 6；With between waterwall 5 and agitator 6 and being respectively provided with dissolved air water in horizontal flow basin and release
Device 7 is put, the connection air-dissolving apparatus 10 of dissolved air water release 7, air-dissolving apparatus 10 are provided with air pressure
Contracting machine 8 and centrifugal pump 9；Whirling well 12 is set up to be connected with horizontal flow basin entrance, and in whirling well
12 tops set chemicals dosing plant 13.
Embodiment 1：
It is 3000m for quantity of circulating water per hour3Hot rolling horizontal flow basin, add from whirling well top
Per hour to the PAM that 2.4kg is uniformly added into whirling well, coarse granule iron scale sinks medicine device 13
Enter eddy flow bottom periodically to pull out as raw materials for sintering, contain the turbid of thin iron scale, impurity and waste oil
The lifting of water boosted pump to horizontal flow basin water inlet, in horizontal flow basin water inlet and between waterwall 5 plus
Mixer 6, stirring water causes that the oil content on thin iron scale surface in water is peeled off into water, while stirring
Mix and also extend iron scale sinking time, it is ensured that the oil on thin iron scale surface can fully be stripped to water
In.The dissolved air water that air-dissolving apparatus 10 are produced is molten between the wall of water distribution 5 and agitator by being located at
Air water release 7 is aerated to water, and microbubble adhesion is suspended in the part oil in water
Part and impurity float up to liquid level, and the addition of PAM contributes to the formation of flco, enhances air supporting
Deoil effect.Water is continued through and entered in horizontal flow basin with waterwall, through the dissolved air water in horizontal flow basin
The microbubble that release releases 7 releasings proceeds aeration, and another part oil content and impurity are floating to liquid
Face.Air supporting parameter is as follows：Inspiratory capacity：0.3L/ (m3 Shui ﹒ min), reflux ratio：15%, gas
Liquor ratio：1.0%, gas pressure：0.4MPa.Iron scale after being deoiled through above method is through grabbing
Its oil content is 4.2% after going out, and the oil content of original greasy filth is 23%, is not added with the same air supporting of medicine phases
After being deoiled under Parameter Conditions the oil content of iron scale be 7.8%, it is seen that dosing can make to deoil after iron
The oil content of squama is less than 5%, that is, reach the standard used as raw materials for sintering.Advection pool surface
Waste oil collected as being sold to oil plant after storage tank through Oil and slag scraping machine 4 and oil skimming machine 3.
Embodiment 2：
It is 3000m for quantity of circulating water per hour3Hot rolling horizontal flow basin, add from whirling well top
Per hour to the PAM that 3kg is uniformly added into whirling well, coarse granule iron scale sinks to medicine device 13
Eddy flow bottom is periodically pulled out as raw materials for sintering, the muddy water containing thin iron scale, impurity and waste oil
Boosted pump lifting is stirred to horizontal flow basin water inlet through horizontal flow basin water inlet and with adding between waterwall 5
Mix device and stir machine 6, stirring makes the oil content on thin iron scale surface in water peel off into water, while stirring
Also extend iron scale sinking time, it is ensured that the oil on thin iron scale surface can fully be stripped to water
In.The dissolved air water that air-dissolving apparatus 10 are produced is by being located at between waterwall 5 and mixer 6
Dissolved air water release 7 is aerated to water, and microbubble adhesion is suspended in the part in water
Oil content and impurity float up to liquid level, and the addition of PAM contributes to the formation of flco, enhances gas
Floating effect of deoiling.Water is continued through and entered in horizontal flow basin with waterwall 5, through molten in horizontal flow basin
The microbubble that air water release releases 7 releasings proceeds aeration, and oil content and impurity are floating to liquid level.
Air supporting parameter is as follows：Inspiratory capacity：0.6L/ (m3 Shui ﹒ min), reflux ratio：10%, gas liquid ratio：
1.5%, gas pressure：0.6MPa.Iron scale after being deoiled through above method after catching its
Oil content is 4.6%, and the oil content of original greasy filth is 25%, is not added with medicine phases with air supporting parameter bar
The oil content of iron scale is 8.6% after being deoiled under part, it is seen that iron scale contains after dosing can make to deoil
Oil cut rate is less than 5%, that is, reach the standard used as raw materials for sintering.The waste oil of advection pool surface
Collected as being sold to oil plant after storage tank through Oil and slag scraping machine 4 and oil skimming machine 3.
Embodiment 3：
It is 3000m for quantity of circulating water per hour3Hot rolling horizontal flow basin, add from whirling well top
Per hour to the PAM that 2.9kg is uniformly added into whirling well, coarse granule iron scale sinks medicine device 13
Enter eddy flow bottom periodically to pull out as raw materials for sintering, contain the turbid of thin iron scale, impurity and waste oil
The lifting of water boosted pump to horizontal flow basin water inlet, through horizontal flow basin water inlet and between waterwall 5 plus
Mixer 6, stirring makes the oil content on thin iron scale surface in water peel off into water, while stirring is also
Extend iron scale sinking time, it is ensured that the oil on thin iron scale surface fully can be stripped in water.
The dissolved air water that air-dissolving apparatus 10 are produced is by being located at the dissolved air water between waterwall 5 and mixer
Release 7 is aerated to water, microbubble adhesion be suspended in part oil content in water and
Impurity floats up to liquid level, and the addition of PAM contributes to the formation of flco, enhances air supporting and deoil
Effect.Water is continued through and entered in horizontal flow basin with waterwall 5, is released through the dissolved air water in horizontal flow basin
Put device release 7 releasings microbubble proceed aeration, oil content and impurity are floating to liquid level.Air supporting is joined
Number is as follows：Inspiratory capacity：0.5L/ (m3 Shui ﹒ min), reflux ratio：25%, gas liquid ratio：2.5%,
Gas pressure：0.8MPa.Iron scale after being deoiled through above method its oil content after catching is
4.3%, the oil content of original greasy filth is 24%, is not added with medicine phases with being deoiled under air supporting Parameter Conditions
The oil content of iron scale is 8.2% afterwards, it is seen that the oil content of iron scale is less than after dosing can make to deoil
5%, that is, reach the standard used as raw materials for sintering.The waste oil of advection pool surface is scraped through frizing
Slag machine 4 and oil skimming machine 3 are collected as being sold to oil plant after storage tank.
Claims (2)
1. a kind of overflow of hot rolling horizontal flow basin air supporting cleaning de-oiling system, including horizontal flow basin side
Weir and oil baffle, the oil skimming machine on top and Oil and slag scraping machine, opposite side with waterwall and bottom
Bucket；It is characterized in that：In horizontal flow basin water inlet and with setting agitator between waterwall；Matching somebody with somebody
Dissolved air water release, dissolved air water release are respectively provided between waterwall and agitator and in horizontal flow basin
Connection air-dissolving apparatus, air-dissolving apparatus are provided with air compressor and centrifugal pump；Set up whirling well and lead to
Cross pipeline to be connected with horizontal flow basin entrance, and chemicals dosing plant is set above whirling well.
2. deoiling for de-oiling system is cleaned in a kind of horizontal flow basin of hot rolling according to claim 1 air supporting
Method, it is characterised in that：Cleaning agent is added in whirling well in chemicals dosing plant；Cleaning agent is
The mixture of anion-polyacrylamide PAM and water；In cleaning agent and whirling well oil-containing and
Thin iron scale of the surface with oil film chemically reacts, and greasy dirt is cleaned agent and takes liquid level to；Eddy flow
Well is pulled out after coarse granule iron scale is precipitated, the thin iron scale and suspended contamination of surface attachment oil film
Taken to horizontal flow basin water inlet together by water；The thin iron scale of oil and surface with oil film is through stirring in muddy water
Enter in horizontal flow basin by with waterwall blasthole after mixing machine stirring, stirring can make thin iron scale surface
Oil film part enters the oil droplet that suspension is formed in water；Part water that centrifugal pump overflows downflow weir and
The pressure air that air compressor is produced forms into air-dissolving apparatus contain microbubble together
Dissolved air water；The microbubble quilt that water oil droplet is produced by the dissolved air release being laid in water
Floating to advection pool surface, oil on liquid level again by the upper scraping plate of Oil and slag scraping machine scrape oil baffle with
Between downflow weir, waste oil is collected into storage tank by oil skimming machine；After being deposited to the oil removing of horizontal flow basin bottom
Thin iron scale pushes bucket by the lower scraping plate of Oil and slag scraping machine；Air supporting parameter includes：Inspiratory capacity, return
Stream ratio, gas liquid ratio and gas pressure, each state modulator scope are as follows：Inspiratory capacity：0.3L/(m3
Shui ﹒ min)~0.7L/ (m3Shui ﹒ min), reflux ratio：10%~25%, gas liquid ratio：
1.0%~2.5%, gas pressure：0.4MPa~0.8MPa.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510870457.2A CN106809936B (en) | 2015-12-02 | 2015-12-02 | Air floatation cleaning and deoiling system and method for hot rolling advection tank |
Applications Claiming Priority (1)
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|---|---|---|---|
| CN201510870457.2A CN106809936B (en) | 2015-12-02 | 2015-12-02 | Air floatation cleaning and deoiling system and method for hot rolling advection tank |
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| CN106809936A true CN106809936A (en) | 2017-06-09 |
| CN106809936B CN106809936B (en) | 2020-09-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112626307A (en) * | 2020-12-09 | 2021-04-09 | 钢城集团凉山瑞海实业有限公司 | Treatment process of hot-rolled oily iron oxide mud |
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| CN204714674U (en) * | 2015-05-29 | 2015-10-21 | 唐鸿芳 | A kind for the treatment of unit of steel rolling greasy filth |
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- 2015-12-02 CN CN201510870457.2A patent/CN106809936B/en active Active
Patent Citations (6)
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| CN101088942A (en) * | 2006-06-14 | 2007-12-19 | 中国科学院生态环境研究中心 | Process of treating oil-containing sludge |
| JP2010046602A (en) * | 2008-08-21 | 2010-03-04 | Stem:Kk | Method of treating oil-containing waste water |
| CN102583615A (en) * | 2012-02-09 | 2012-07-18 | 辽宁华孚环境工程有限公司 | Method modifying horizontal flow sedimentation tank into sedimentation floatation tank and modified sedimentation floatation tank |
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