CN101671572B - Oil shale dry distillation recovery technology - Google Patents
Oil shale dry distillation recovery technology Download PDFInfo
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- CN101671572B CN101671572B CN 200910187607 CN200910187607A CN101671572B CN 101671572 B CN101671572 B CN 101671572B CN 200910187607 CN200910187607 CN 200910187607 CN 200910187607 A CN200910187607 A CN 200910187607A CN 101671572 B CN101671572 B CN 101671572B
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Abstract
The invention discloses an oil shale dry distillation recovery technology, comprising the steps: the first washed dry distillation gas sequentially enters into washing segments of a gas saturation washing tower and an air saturation washing tower to be secondly washed and thirdly washed, the washing water which flows out of the bottoms of the towers are statically layered, the shale oil enters into a product oil recovery system, and the washing water enters into a flotation tank to recover emulsified oil contained therein; the dry distillation gas enters into a cooling tower to be fourthly washed, the washing water which flows out of the bottoms of the towers are statically layered, and the shale oil enters into the product oil recovery system; and the dry distillation gas enters into a static oil capturing tower to capture the light oil contained therein, one part of the dry distillation gas at the outlet of the static oil capturing tower enters into a saturation segment at the upper part of the gas saturation washing tower, is heated and wetted by the high-temperature washing water and is heated by a heating furnace for providing heat cycle gas for a dry distillation furnace, and the other part of the dry distillation gas enters into the heating furnace as fuel gas. The technology has the advantages of high oil recovery rate to reach 80%, low oil loss, and capability of effectively preventing from environment pollution, and the like, and is worth popularizing and applying.
Description
One, technical field
The invention belongs to the oil shale distillation technical field, be specifically related to a kind of oil shale dry distillation recovery technology.
Two, background technology
At present, there are China, Brazil, Estonia etc. in the country of oil shale oil-refining suitability for industrialized production both at home and abroad, and China's oil shale oil-refining technique was prevailed the thirties in last century, the history in existing more than 70 years.Existing dry distillation recovery technology is three grades of water wash systems, comprise that namely the carbonizing gas of shale oil, water and dry distillation gas is after gas retort outlet derivation, respectively in collecting tubule (one-level), washing tower (secondary) and cooling tower (three grades), cool off and washing with direct the contact with carbonizing gas of recirculated water, thereby formed three grades of washings.Specific embodiment is: 1, the one-level water wash system is comprised of collecting tubule, collection mud tank and collection dredge pump.Circulation cleaning water is sent in the collecting tubule by the collection dredge pump, and 90-100 ℃ carbonizing gas is carried out spray washing, and wherein contained 60% shale oil is washed down.Shale oil is brought in the collection mud tank by water, and profit carries out layering by the proportion difference in tank.The water of lower floor is sent into the collecting tubule internal recycle by the collection dredge pump and is used.The oil on upper strata is delivered to oil-water separation system and is got the finished product shale oil.2, the secondary water wash system is comprised of washing saturator, wash trough and washing pump.Washing saturator is the equipment of two towers unification, and top is washing section, and the bottom is saturated section.Carbonizing gas temperature after one-level washing still has about 85 ℃, and after entering from wash tower bottoms, contained 30% oil wash is wherein got off in the washing water countercurrent flow of sending into washing pump.Carbonizing gas after the washing is derived from cat head, and be divided into two parts behind gas dispatch machine: a part is sent into process furnace as thermal circulation gas, and some sends into third stage water wash system.The washing water of band oil enter saturated section of bottom, behind the air temperature raising humidification that air blower is sent into, enter wash trough at the bottom of tower.In wash trough, oil, water carry out layering by the proportion difference, and the washing water of lower floor are sent into washing tower by washing pump and recycled, and the oil on upper strata is delivered to oil-water separation system and got the finished product shale oil.3, three grades of water wash systems are comprised of cooling tower, cooling pool, cooling pump, water cooling tower, cooling pond, cold water pump.Carbonizing gas temperature after the two-stage washing still has about 80 ℃, need to be reduced to 55 ℃ to satisfy processing requirement in this system.The reverse contact of washing water that the carbonizing gas that enters from cooling tower bottom and cat head cold water are pumped into and being lowered the temperature derived by cat head again.The oil-containing washing water enter cooling pool by tower bottom, in cooling pool, oil, water carry out layering by the proportion difference, the washing water of lower floor are sent in the water cooling tower by cooling pump, after borrowing natural wind to carry out cooling down, enter in the cooling pond of water cooling tower bottom, be pumped into cooling tower top by cold water again and recycle.The oil on cooling pool upper strata is delivered to the processed oil recovery system and is got the finished product shale oil.Cooling tower outlet carbonizing gas is divided into two parts: a part is as the fuel of process furnace, and the waste gas after the burning is after flue gas desulfurization (FGD) unit is processed, through smoke stack emission; Another part is then made fuel gas for gas fired-boiler and generating set after dry desulfurization device is processed.There is following shortcoming in this technique: 1, the shale oil recovery rate is low: carbonizing gas outlet temperature after three grades of washings is 55 ℃, also has the part lightweight oil not to be retracted under this temperature in the carbonizing gas and (is about 10g/Nm
3), having reduced the rate of recovery of shale oil, oil recovery rate only has 70%.2, the water cooling tower that adopts in three grades of water wash systems is open type equipment, makes that pollutant component evaporates in the atmosphere in the water, and directly the range of influence environmental quality pollutes.3, existing washing saturator epimere is washing section, and hypomere is saturated section, and the high temperature oil-containing washing water of washing behind the carbonizing gas enter saturated section for air carries out humidification when heating, and wherein contained oil is entered in the saturated air and produces and loses.
Three, summary of the invention
The purpose of this invention is to provide a kind of shale oil loss of effectively reducing, improve the rate of recovery, the oil shale dry distillation recovery technology of environmental contamination reduction.
For achieving the above object, the technical solution used in the present invention is: this technique comprises the one-level water wash system, the washing section that carbonizing gas after once washing enters the saturated washing tower of gas and air saturation washing tower bottom successively carries out secondary, three washings, the washing water that go out from tower bottom flow are behind standing demix, shale oil enters the processed oil recovery system, and washing water enter in the air flotation pool contained oil in water emulsion is reclaimed; Carbonizing gas after three washings is sent into and is carried out four washings in the cooling tower, and the washing water that go out from tower bottom flow are behind standing demix, and shale oil enters the processed oil recovery system; Carbonizing gas after four washings enters static and catches in the oily tower, contained lightweight oil is captured, the carbonizing gas part that static is caught the outlet of oily tower is sent into saturated section of the saturated washing tower of gas top, by high-temperature wash water warming and humidifying, again after the process furnace heating, for gas retort provides thermal circulation gas, another part gas that acts as a fuel is sent into process furnace.
It is to substitute three grades of traditional washings with level Four washing that the present invention reclaims technique, compared with prior art has following advantage: 1, adopt the level Four washing can be with below the carbonizing gas final temperature to 45 ℃, make wherein part oil and lightweight oil (about 66g/Nm altogether
3) can effectively be reclaimed, improved the rate of recovery of shale oil, be increased to 80% by original 70%, reduced loss of material, increased economic benefit.2, the saturated washing tower of gas that adopts in two, three grades of water wash systems and air saturation washing tower are that top is that saturated section, bottom are the structure of washing section, after namely first air humidification being heated, the washing water that temperature slightly descends enter washing section washing carbonizing gas again, when having improved the saturated purity of washing, cooling efficiency and air, reduced the oil mass that enters in the saturated air, reduce oily loss, improved oil recovery rate.Secondly, owing to increased air flotation pool and static is caught oily tower, so that the lightweight oil in carbonizing gas and the washing water and oil in water emulsion obtain efficient recovery, also played the effect that reduces the oil loss, improves oil recovery rate.
Four, description of drawings
Accompanying drawing is process flow sheet of the present invention.
Five, embodiment
As shown in the figure, 90-100 ℃ of carbonizing gas from gas retort 1 is derived enters in the collecting tubule 2, and by the circulation cleaning water spray washing of being sent into by collection dredge pump 4, its shale oil of contained 60% is washed down.Shale oil is brought in the collection mud tank 3 by water, and profit carries out layering by the proportion difference in tank, and the water of lower floor is sent into collecting tubule 2 internal recycle by collection dredge pump 4 and used.The shale oil on upper strata is delivered to the processed oil system; The carbonizing gas of deriving from collecting tubule 2 enters the saturated washing tower 20 of gas and the air saturation washing tower 5 at the bottom of tower successively, in the washing section of its underpart with the washing water countercurrent flow of sending into from cat head, wherein contained oil wash is got off, realize for the second time, wash for three times.Above-mentioned saturated washing tower 20, the 5th is that saturated section and bottom are that washing section consists of by top.The washing water that the saturated washing tower 20 of gas and air saturation washing tower 5 tower bottom flows go out enter in the wash trough 6 jointly, and profit carries out layering by the proportion difference in the pond, and the shale oil on upper strata enters the processed oil recovery system.The washing water of lower floor enter in the air flotation pool 21, utilize the air supporting principle that washing water are carried out oil, water, the processing of greasy filth three phase separation, and oil in water emulsion that will be wherein reclaim deliver to the processed oil system after, send into again the saturated washing tower 20 of gas and the use of air saturation washing tower 5 internal recycle by washing pump 7, saturated section heat for circulating mash gas and external air humidification after, enter again washing section washing carbonizing gas; The carbonizing gas of deriving from air saturation washing tower 5 middle parts is sent into cooling tower 9 interior washing water countercurrent flows with sending into from cat head at the bottom of tower after gas dispatch machine 8 becomes malleation, wherein contained oil wash is got off, and realizes the 4th washing.The washing water that go out from cooling tower 9 underflows enter the cooling pool 10, and profit carries out layering by the proportion difference in the pond, and the shale oil on upper strata enters the processed oil recovery system.The washing water of lower floor enter in the floating head rod baffle heat exchanger 11 of sealing, after the low temperature water purification heat exchange of being sent here by cold water pump 14, send into cooling tower 9 internal recycle by cooling pump 13 and use.Adopt the totally enclosed interchanger of this kind 11 to substitute original open type water cooling towers, make washing water under the condition of sealing, carry out heat exchange, prevented that wherein contained pollutant emission to atmosphere, causing environmental pollution.High temperature water purification after the heat exchange can be used for heating for residential area (winter), air conditioner refrigerating (summer) and generating; The carbonizing gas of deriving from cooling tower 9 tops enters static and catches in the oily tower 17, contained lightweight oil is captured, and send into the processed oil recovery system.The oxygen on line analyzer can be installed between gas dispatch machine 8 and cooling tower 9, the content of oxygen in the carbonizing gas be set in static catch in the oily tower 17 safe operation scopes.When oxygen level exceeded standard in the carbonizing gas, static is caught oily tower 17 can realize auto-breaking.The carbonizing gas part of catching oily tower 17 cats head and derive from static is sent into saturated section of the saturated washing tower of gas 20 tops, by high-temperature wash water warming and humidifying, again after recuperative heater 16 heating, for gas retort 1 provides thermal circulation gas.Except behind the ammonia, the part gas that acts as a fuel is sent into recuperative heater 16 to another part through ammonia absorber 18, and the flue gas that burning produces is discharged from the cigarette fontanel after desulfurization.Another part is after desulphurization system 15 removes H2S gas, for power station, boiler etc. provides fuel.The effect of ammonia absorber is: remove contained ammonia in the fuel gas, make it can not generate oxynitride in combustion processes, reduced the pollution to environment.Simultaneously, the ammonia of absorption also can make the byproducts such as ammonium sulfate, to increase the by-product value; Sent into as combustion air and added in the heat-accumulation type hot stove 16 by the air part of sending outside that air blower 19 is sent here, another part is sent into saturated section of air saturation washing tower 5 tops, and behind high-temperature wash water warming and humidifying, main air is sent into gas retort 1 bottom in doing.The retort sewage that produces in the processed oil system through waste disposal plant 12 process except deoil and principal pollutant after, send back in the basin of gas retort 1 bottom, with the cooling down high-temperature waste residue.
Claims (2)
1. oil shale dry distillation recovery technology, comprise the one-level water wash system, it is characterized in that: the washing section that the carbonizing gas after once washing enters the saturated washing tower of gas (20) and air saturation washing tower (5) bottom successively carries out secondary, three washings, the washing water that go out from tower bottom flow are behind standing demix, shale oil enters the processed oil recovery system, and washing water enter in the air flotation pool (21) contained oil in water emulsion is reclaimed; Carbonizing gas after three washings is sent into and is carried out four washings in the cooling tower (9), and the washing water that go out from tower bottom flow are behind standing demix, and shale oil enters the processed oil recovery system; Carbonizing gas after four washings enters static and catches in the oily tower (17), contained lightweight oil is captured, the carbonizing gas part that static is caught oily tower (17) outlet is sent into saturated section of the saturated washing tower of gas (20) top, by high-temperature wash water warming and humidifying, again after process furnace (16) heating, for providing thermal circulation gas, another part gas that acts as a fuel, gas retort (1) sends into process furnace (16).
2. 1 described oil shale dry distillation recovery technology as requested is characterized in that: static catch fuel gas that oily tower (17) derives through ammonia absorber (18) except behind the ammonia, send into again process furnace (16).
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| CN 200910187607 CN101671572B (en) | 2009-09-25 | 2009-09-25 | Oil shale dry distillation recovery technology |
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| CN 200910187607 CN101671572B (en) | 2009-09-25 | 2009-09-25 | Oil shale dry distillation recovery technology |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021001A (en) * | 2010-12-14 | 2011-04-20 | 上海华畅环保设备发展有限公司 | Device and method for recovering shale oil from air tower segment of oil shale distillation system |
| CN102031130A (en) * | 2010-12-14 | 2011-04-27 | 上海华畅环保设备发展有限公司 | Device and method for utilizing circulating water at air tower section of oil shale destructive distillation system |
| CN102021003A (en) * | 2010-12-14 | 2011-04-20 | 上海华畅环保设备发展有限公司 | Device and method for recovering shale oil of cooling tower section of oil shale dry distillation system |
| EE05753B1 (en) * | 2010-12-14 | 2015-07-15 | Shanghai Huachang Environmental Protection Co., Ltd. | Method and device for recycling of oil-water-sludge of oil shale dry distillation system |
| CN102021002A (en) * | 2010-12-14 | 2011-04-20 | 上海华畅环保设备发展有限公司 | Device and method for utilizing circulating methane gas from oil shale dry distillation system |
| CN102021004A (en) * | 2010-12-14 | 2011-04-20 | 上海华畅环保设备发展有限公司 | Circulating water utilization device and method of cooling tower section of oil shale dry distillation system |
| CN104531196A (en) * | 2014-12-31 | 2015-04-22 | 北票北塔油页岩综合开发利用有限公司 | Full-negative-pressure recovery process of dry distillation furnace generation gas in oil shale dry distillation oil refining and system thereof |
| CN108504371A (en) * | 2018-03-29 | 2018-09-07 | 抚顺矿业集团有限责任公司工程技术研究中心 | A kind of waste tire recovery and treatment method based on shale retorting system |
| CN110368764B (en) * | 2019-07-11 | 2021-05-25 | 中国神华煤制油化工有限公司 | Method for removing microparticles carried in gas |
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| US5041210A (en) * | 1989-06-30 | 1991-08-20 | Marathon Oil Company | Oil shale retorting with steam and produced gas |
| CN101230283A (en) * | 2008-02-01 | 2008-07-30 | 抚顺矿业集团有限责任公司 | Oil shale retorting process reclaiming method |
| CN201193222Y (en) * | 2008-03-10 | 2009-02-11 | 中国重型机械研究院 | Oil production device of oil shale retort |
| CN101434847A (en) * | 2008-03-10 | 2009-05-20 | 中国重型机械研究院 | Oil shale retort oil extraction process |
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2009
- 2009-09-25 CN CN 200910187607 patent/CN101671572B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5041210A (en) * | 1989-06-30 | 1991-08-20 | Marathon Oil Company | Oil shale retorting with steam and produced gas |
| CN101230283A (en) * | 2008-02-01 | 2008-07-30 | 抚顺矿业集团有限责任公司 | Oil shale retorting process reclaiming method |
| CN201193222Y (en) * | 2008-03-10 | 2009-02-11 | 中国重型机械研究院 | Oil production device of oil shale retort |
| CN101434847A (en) * | 2008-03-10 | 2009-05-20 | 中国重型机械研究院 | Oil shale retort oil extraction process |
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Inventor after: Han Fang Inventor after: Zhang Jing Inventor after: Chen Weisi Inventor after: Bao Mingfu Inventor after: Gao Jian Inventor after: Xing Dasong Inventor after: Chen Shengzhong Inventor after: Xu Hui Inventor after: Qu Xian Inventor after: Li Bai Inventor after: Wei Yongchen Inventor before: Han Fang Inventor before: Bao Mingfu Inventor before: Gao Jian Inventor before: Xing Dasong Inventor before: Chen Shengzhong Inventor before: Xu Hui Inventor before: Qu Xian |
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