CN104071964A - Steel rolling oil sludge drying method and device - Google Patents
Steel rolling oil sludge drying method and device Download PDFInfo
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- CN104071964A CN104071964A CN201310103096.XA CN201310103096A CN104071964A CN 104071964 A CN104071964 A CN 104071964A CN 201310103096 A CN201310103096 A CN 201310103096A CN 104071964 A CN104071964 A CN 104071964A
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- greasy filth
- oil sludge
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Abstract
A steel rolling oil sludge drying method and a device are disclosed. According to the method and the device, the steel rolling oil sludge is installed into an oil sludge storage bin, the oil sludge in the storage bin is fed into a screw conveyer through a feeder and is fed to a material inlet of an intensive mixer through the screw conveyer, the adhesive oil sludge is pushed to move along the inner barrel wall of the intensive mixer by scraper type blades of the intensive mixer, the outer barrel wall of the intensive mixer is heated by external heat, the heated outer barrel wall transfers heat to the inner barrel wall, the oil sludge that is dug by the scraper type blades, falls and is pushed to the discharging end is heated by the inner barrel wall, the temperature of the inner barrel wall is controlled to be 280-300 DEG C that is lower than the boiling point of oil in the oil sludge, the temperature of a steam outlet is controlled to be 120-130 DEG C, and a condenser is disposed at the steam outlet to recover water. The steel rolling oil sludge is dried by the method and the device, and therefore problems of secondary pollution, nonuniform drying, discontinuous production, long oil sludge treatment process for dehydration firstly and oil removal secondly, and high production cost, which are common in oil sludge drying technologies at present, are overcome.
Description
Technical field
The invention belongs to Using Metallurgical Solid Wastes recycling field, relate in particular to a kind of drying installation and method of steel rolling greasy filth.
Background technology
The a large amount of ion dust mud contaning of the annual generation of iron and steel enterprise, according to pertinent literature, report the dirt mud that one ton of steel of every production will produce 10 ~ 15kg, wherein part is in enterprises recycle, some could utilize or store up discarded after need processing because containing harmful ingredients, not only wasted resource, but also to environment.During as steel rolling and continuous casting, the iron scale of billet surface can peel off under the effect of mechanical force and impact of water, imports eddy flow well after pouring trench, and thinner iron scale is finally washed into horizontal sedimentation tank.Iron scale in settling tank is because sneaking into the oily greasy filth that is otherwise known as of milling train oil, gear oil, hydraulic efficiency oil and roller-way.Greasy filth all iron content after oven dry reaches 70% ~ 72%, as a higher greasy filth annual production of Large Steel ironworks iron grade reaches 30,000 tons.But to this, containing have an appointment 25% ~ 33% water and approximately 1% ~ 3% oily greasy filth, be difficult to harmless resource utilization utilization, how reclaim the iron resources in greasy filth and avoid greasy filth the pollution of environment to be caused to the attention of manufacturing enterprise.
Also do not have at present good greasy filth to utilize method, traditional greasy filth treatment process is as follows: (1) roasting method: in shaft furnace or rotary kiln, carry out roasting, although the method can obtain operable iron scale, but consume a large amount of energy, the oil smoke producing in production process can cause heavier secondary pollution to air; (2) distillation method: the Chinese patent that application number is 03206650.3 " a kind of device systems of processing steel rolling oil-containing iron scale ", by the method for distillation, the moisture in greasy filth and oil content are evaporated away, reclaim iron scale and oil content, but the method will consume a large amount of energy, processing cost is higher; (3) extraction process: the method adopts chemical agent that the oil in iron scale is extracted and Separation and Recovery, the major defect of this method is to need outer adding medicine, increases cost, and easily produces new water pollution; (4) as raw materials for sintering recycle method: be about in greasy filth the less greasy filth of part oil-containing and be placed on dump and drench and remove part moisture, allocate agglomerate into improve the grade of agglomerate, but the method can cause dump environmental pollution, can not make again greasy filth all be utilized, more exist greasy filth in loose sinter mixture during exhausting oil smoke condensation hang draught fan impeller and make blower fan lose transient equilibrium and low-flash oil hidden danger that leads to fire failure on fire.
Make steel rolling greasy filth as ironmaking or steelmaking feed, generally will up to 25% ~ 33% greasy filth, carry out drying treatment to water ratio, because water content is too high, cannot make it mix with other raw material; Also to avoid the oil pollution environment in greasy filth in production process.Because contain oil content in greasy filth, greasy filth is piled up and will be produced unpleasant peculiar smell in several days, and greasy filth must be processed after pulling out from settling tank in time.
Patent (US5964045) proposes to pass into 250 ℃ of hot flue gases in rotary kiln greasy filth is carried out to drying and dehydrating, then adopts two sections of vacuum dryers, under 300 ℃ of conditions, greasy filth is carried out to vacuum de-oiling.The method easily makes waste oil and water evaporate simultaneously, causes waste oil bonding fly-ash separator, affects fly-ash separator operation and reduces dust removing effects; Can not make the oil-containing iron scale after dehydration directly be utilized, vacuum de-oiling increases production cost.
Publication number is the Chinese patent of CN1579972A, and the disk dryer that " treatment process and the device systems of steel rolling oil-containing iron scale " report is sent greasy filth into external heat dewaters, and the oil-containing iron scale after dehydration is admitted to water distilling apparatus again and carries out de-oiling.The method can not guarantee greasy filth uniform drying, also will be to the further de-oiling of dried greasy filth, and complex process, greasy filth pre-treatment cost is higher.
Application number is the Chinese patent of 200920179132.X: " realize steel rolling greasy filth three phase separation and reclaim brown iron oxide and the equipment of recycle stock " has the fixedly external heat rotating cylinder of scraper plate to be dried steel rolling greasy filth in having introduced and having used, and dried greasy filth enters de-oiling tower and continues de-oiling.Although the method has utilized the hot flue gas of sintering plant as thermal source, need the special-purpose external heat rotating cylinder of preparation, in drying process, the transmission of greasy filth is also had any problem, but also needs to be equipped with de-oiling tower, can not make dried greasy filth directly be utilized, and production cost is higher.For exist secondary pollution and the first dry de-oiling again generally created in existing steel rolling greasy filth patented technology, could utilize the problem of steel rolling greasy filth.
Summary of the invention
The present invention is directed to a large amount of ion dust mud contaning of the annual generation of above-mentioned iron and steel enterprise, direct processing and utilizing or store up discarded, not only wasted resource, but also to problems such as environments, a kind of new steel rolling greasy filth drying means and device thereof are proposed, it is by the viscosity greasy filth in exothermic heating strong screw conveyer, and greasy filth is heated evenly, carries the traditional greasy filth drying means of smooth solution to exist greasy filth to be difficult to the problem that is evenly dried and carries.By controlling drying temperature, just slough the water in greasy filth and do not slough the oil in greasy filth, the greasy filth direct utilization after dehydration.So just avoided traditional distillation method to remove respectively water and the oily complicated technology again greasy filth being utilized in greasy filth.The 3rd, this method production process is continuous, drying process is short, drying cost is low, the environmental protection of greasy filth drying process, and after being dried, the greasy filth of not de-oiling is easy to mix and directly utilized with other raw material, as prepared the compound of the refrigerant of pelletizing or steel-making with it.
Steel rolling greasy filth is sealed heating in worm conveyor, and Heating temperature is more than the boiling point of water, below the boiling point of oil.
Concrete drying means is as follows:
Steel rolling greasy filth is loaded into greasy filth feed bin, greasy filth in feed bin is sent into worm conveyor through blanking device, by worm conveyor, sent into the feeding mouth of intensive mixer, viscosity greasy filth is advanced along intensive mixer inner tube wall by the scraper type blade of intensive mixer, exothermic heating intensive mixer wall of the outer-rotor, the wall of the outer-rotor being heated is passed to inner tube wall by heat, inner tube wall heating is dug by scraper type blade the greasy filth that falls and advanced to discharge end, controlling inner tube wall temperature is 280 ~ 300 ℃, this temperature is lower than the oily boiling point in greasy filth, steam exit temperature is controlled at 120 ~ 130 ℃, steam outlet has condenser to reclaim moisture.
Steel rolling greasy filth drying installation structure of the present invention is, the feed opening of greasy filth feed bin is connected with the feeding mouth of worm conveyor, the discharge port of worm conveyor is connected with the feeding mouth of strong screw conveyer in being sealed in smoke chamber, the discharge port of strong screw conveyer is connected with the feeding mouth of dry greasy filth worm conveyor, smoke inlet and exhanst gas outlet are established respectively in smoke chamber bottom and top, and the discharge end top of worm conveyor is connected with condenser by vapour pipe.
Advantage of the present invention and effect are that (1) utilize to control drying temperature and make water in greasy filth and separating of oil, need not just can be used to dried greasy filth to the further de-oiling of greasy filth; (2) utilize strong screw conveyer scraper type blade transmission viscosity greasy filth, make the not bonding barrel of viscosity greasy filth, the transmission of viscosity greasy filth is smooth and easy, and greasy filth is dried when back and forth being dug and falling, and greasy filth uniform drying is produced continuously; (3) utilize hot flue gas external heat worm conveyor wall of the outer-rotor, utilized waste heat, significantly reduced drying cost; (4) by condenser condenses, reclaim dry steam, make steam free from environmental pollution, make again water resources be recycled.By the inventive method and device thereof, steel rolling greasy filth is dried, has solved ubiquitous secondary pollution in existing greasy filth dry technology, uneven drying is even, produce discontinuously, the de-oiling again of first dewatering, greasy filth pretreatment process are long, the problem that production cost is high.
Accompanying drawing explanation
Accompanying drawing is structural representation of the present invention.
Wherein 1 greasy filth feed bin, 2 feed bin bottom worm conveyors, 3 smoke chambers, semi-finals wrench of a force system transfer roller, 5 are dried greasy filth worm conveyors, 6 smoke inlets, 7 exhanst gas outlets, 8 steam condensers
Embodiment
Below in conjunction with accompanying drawing, the present invention is elaborated:
As shown in the figure, the feed opening of steel rolling greasy filth drying installation structure greasy filth feed bin 1 of the present invention is connected with the feeding mouth of worm conveyor 2, the discharge port of worm conveyor 2 is connected with the feeding mouth of strong screw conveyer 4 in being sealed in smoke chamber 3, the discharge port of strong screw conveyer 4 is connected with the feeding mouth of dry greasy filth worm conveyor 5, smoke inlet 6 and exhanst gas outlet 7 are established respectively in smoke chamber 3 bottoms and top, and the discharge end top of worm conveyor 4 is connected with condenser 8 by vapour pipe.
Concrete technology flow process is: steel rolling greasy filth is loaded into greasy filth feed bin, greasy filth in feed bin is sent into worm conveyor through blanking device, by worm conveyor, sent into the feeding mouth of intensive mixer, viscosity greasy filth is advanced along intensive mixer inner tube wall by the scraper type blade of strong screw conveyer, exothermic heating strong screw conveyer wall of the outer-rotor, the wall of the outer-rotor being heated is passed to inner tube wall by heat, inner tube wall heating is dug by scraper type blade the greasy filth that falls and advanced to discharge end, controlling inner tube wall temperature is 280 ~ 300 ℃, this temperature is lower than the oily boiling point in greasy filth, make it substantially non-volatile, and moisture is formed by evaporation to steam, this temperature is lower than the oily boiling point in greasy filth, steam exit temperature is controlled at 120 ~ 130 ℃, steam outlet has condenser to reclaim moisture, do not affect environment, by above process, make greasy filth by even successive drying.
Embodiment 1
Greasy filth is pulled out with grab bucket from settling tank, drenched and remove surface-moisture, reinstall in the transportation means of leakproof facility, greasy filth is discharged in feed bin 1, the greasy filth in feed bin 1 is sent into the feeding mouth of strong screw conveyer 4 through worm conveyor 2.Greasy filth, by the scraper type screw blade of strong screw conveyer 4, is advanced into discharge port along strong screw conveyer inner tube wall.Strong screw conveyer inner tube wall is by the hot flue gas heating of hot smoke inlet 6 ejections, and inner tube wall temperature is controlled at 300 ℃, and this temperature is lower than the boiling point of oil in greasy filth.Hot flue gas after heating is discharged by hot exhanst gas outlet 7.The vapor temperature of discharge port is controlled at 130 ℃, and the steam that greasy filth evaporates is by steam condenser 8 condensations and collect moisture.Strong screw conveyer 4 is sealed in smoke chamber 3, to prevent that flue gas or peculiar smell from leaking.Dried greasy filth is discharged into the feeding mouth of dry greasy filth worm conveyor 5 by the discharge port of strong screw conveyer 4, then is discharged to emptying point by dry greasy filth worm conveyor 5.Greasy filth naturally cooling after dry, as the raw material of preparing blast furnace acid pellet.
Embodiment 2
Greasy filth is pulled out with grab bucket from settling tank, drenched and remove surface-moisture, reinstall in the transportation means of leakproof facility, greasy filth is discharged in feed bin 1, the greasy filth in feed bin 1 is sent into the feeding mouth of strong screw conveyer 4 through worm conveyor 2.Greasy filth, by the scraper type screw blade of strong screw conveyer 4, is advanced into discharge port along strong screw conveyer inner tube wall.Strong screw conveyer inner tube wall is by the hot flue gas heating of hot smoke inlet 6 ejections, and inner tube wall temperature is controlled at 280 ℃, and this temperature is lower than the boiling point of oil in greasy filth.Hot flue gas after heating is discharged by hot exhanst gas outlet 7.The vapor temperature of discharge port is controlled at 120 ℃, and the steam that greasy filth evaporates is by steam condenser 8 condensations and collect moisture.Strong screw conveyer 4 is sealed in smoke chamber 3, to prevent that flue gas or peculiar smell from leaking.Dried greasy filth is discharged into the feeding mouth of dry greasy filth worm conveyor 5 by the discharge port of strong screw conveyer 4, then is discharged to emptying point by dry greasy filth worm conveyor 5.Greasy filth naturally cooling after dry, as the raw material of preparation steel-making refrigerant.
Claims (3)
1. a steel rolling greasy filth drying means, is characterized in that, steel rolling greasy filth is sealed heating in worm conveyor, and Heating temperature is more than the boiling point of water, below the boiling point of oil.
2. a kind of steel rolling greasy filth drying means according to claim 1, is characterized in that, concrete drying means is as follows:
Steel rolling greasy filth is loaded into greasy filth feed bin, greasy filth in feed bin is sent into worm conveyor through blanking device, by worm conveyor, sent into the feeding mouth of intensive mixer, viscosity greasy filth is advanced along intensive mixer inner tube wall by the scraper type blade of strong screw conveyer, exothermic heating strong screw conveyer wall of the outer-rotor, the wall of the outer-rotor being heated is passed to inner tube wall by heat, inner tube wall heating is dug by scraper type blade the greasy filth that falls and advanced to discharge end, controlling inner tube wall temperature is 280 ~ 300 ℃, this temperature is lower than the oily boiling point in greasy filth, steam exit temperature is controlled at 120 ℃ ~ 130 ℃, steam outlet has condenser to reclaim moisture.
3. a kind of steel rolling greasy filth drying means as claimed in claim 1 or 2 device used, it is characterized in that, the feed opening of greasy filth feed bin (1) is connected with the feeding mouth of worm conveyor (2), the feeding mouth of the strong screw conveyer (4) that the discharge port of worm conveyor (2) is interior with being sealed in smoke chamber (3) is connected, the discharge port of strong screw conveyer (4) is connected with the feeding mouth of dry greasy filth worm conveyor (5), smoke inlet (6) and exhanst gas outlet (7) are established respectively in smoke chamber (3) bottom and top, the discharge end top of worm conveyor (4) is connected with condenser (8) by vapour pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310103096.XA CN104071964B (en) | 2013-03-27 | 2013-03-27 | Steel rolling oil sludge drying method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310103096.XA CN104071964B (en) | 2013-03-27 | 2013-03-27 | Steel rolling oil sludge drying method and device |
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| CN104071964A true CN104071964A (en) | 2014-10-01 |
| CN104071964B CN104071964B (en) | 2017-02-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115183554A (en) * | 2022-09-09 | 2022-10-14 | 江苏先锋干燥工程有限公司 | Drum-type conveyor and dryer using same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1488591A (en) * | 2002-10-10 | 2004-04-14 | 中国石油化工股份有限公司 | Oil-containing sludge treating method |
| CN1579972A (en) * | 2003-08-01 | 2005-02-16 | 首钢总公司 | Method and equipment system for treating oil-containing iron scale for steel rolling |
| CN101759344A (en) * | 2010-01-22 | 2010-06-30 | 西安长庆科技工程有限责任公司 | Oil field oil sludge drying treatment combined device and oil sludge drying treatment technique |
| CN102840587A (en) * | 2012-09-03 | 2012-12-26 | 林秀梅 | Compound method and system for directly recovering heat inside and outside rotary kiln |
-
2013
- 2013-03-27 CN CN201310103096.XA patent/CN104071964B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1488591A (en) * | 2002-10-10 | 2004-04-14 | 中国石油化工股份有限公司 | Oil-containing sludge treating method |
| CN1579972A (en) * | 2003-08-01 | 2005-02-16 | 首钢总公司 | Method and equipment system for treating oil-containing iron scale for steel rolling |
| CN101759344A (en) * | 2010-01-22 | 2010-06-30 | 西安长庆科技工程有限责任公司 | Oil field oil sludge drying treatment combined device and oil sludge drying treatment technique |
| CN102840587A (en) * | 2012-09-03 | 2012-12-26 | 林秀梅 | Compound method and system for directly recovering heat inside and outside rotary kiln |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115183554A (en) * | 2022-09-09 | 2022-10-14 | 江苏先锋干燥工程有限公司 | Drum-type conveyor and dryer using same |
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| CN104071964B (en) | 2017-02-22 |
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