CN103087741A - Low-temperature dry distillation process for granulated oil shale based on walking beam furnace - Google Patents
Low-temperature dry distillation process for granulated oil shale based on walking beam furnace Download PDFInfo
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- CN103087741A CN103087741A CN2013100279284A CN201310027928A CN103087741A CN 103087741 A CN103087741 A CN 103087741A CN 2013100279284 A CN2013100279284 A CN 2013100279284A CN 201310027928 A CN201310027928 A CN 201310027928A CN 103087741 A CN103087741 A CN 103087741A
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Abstract
The invention discloses a low-temperature dry distillation process for granulated oil shale based on a walking beam furnace. The low-temperature dry distillation process comprises the following steps of: heating up the granulated oil shale to 200 DEG C for drying to remove the moisture in the material under the condition of isolating air by adopting a heat radiant tube combustion technology as a material heating way; continuously heating up the material to 500 DEG C, so that the oil shake material is thermally decomposed to form solid semicoke; and purifying and recycling the separated volatile matters to obtain the products such as shale oil and coal gas, wherein the coal gas is used as the fuel of the heat accumulating type radiant tube after absorbing the waste heat of the semicoke. The low-temperature dry distillation process disclosed by the invention is simple in process, low in energy consumption, free of pollution and high in product quality.
Description
Technical field
The invention belongs to the oil shale distillation technical field, be specifically related to a kind of granule wax shale low-temperature pyrolysis technique based on walking beam furnace.
Background technology
The technique that at present oil shale distillation is adopted is divided into solid thermal carriers dry distillation and gaseous heat-carrier dry distillation.But domestic and international most of distillation process can only be particle destructive distillation more than 10mm to diameter, small-particle below 10mm is because particle is little, the storeroom space is little, ventilation property is bad, destructive distillation institute heat requirement temperature can not evenly be passed to material, easily causes stifled stove, coking, and gas retort can not normally be moved, thereby granule wax shale is given it up, wasting of resources rate reaches more than 20%.
External oil shale distillation technology has several, and the Petrosix retorting technique is the dry distillation method of oil shale of Petroleo Brasileiro SA's development, adopts the vertical dry furnace, shale from top to bottom, recycle gas from bottom to top, the processing block footpath is 6.4～76mm, can't process granule wax shale.The Kiviter technology of Estonia's exploitation equally also can only be processed lumpy material.Domestic Fushun type retort can only the above resinous shale of destructive distillation 12mm.
Typical technique for granule wax shale destructive distillation has three kinds abroad, a kind of is the ATP stove (Alberea-Taciuk Processor) that adopts Australia, this device is solid thermal carriers rotary type gas retort, equipment is huge, complex structure, power consumption large, fluctuation of service, frequent shutdown maintenance, working rate is only 50% left and right, has the longlyest once also only moved continuously 96 days.A kind of is Estonian Ge Luote (Galoter) stove, can process the resinous shale of 0-25mm, processing power 3000t/d, the problem that equipment exists is that operation factor is not high, the heavy oil proportion is large, has the problems such as machine operation, oil gas dedusting and flue gas ash removal.The third is the Tosco-II oil shale distillation technology by the exploitation of U.S. Tosco company, be used for processing granule wax shale, it is thermal barrier that this system adopts the porcelain ball, oil recovery rate reaches 90%, the problem that this equipment exists is: facility investment is high, maintenance capacity is large, and thermo-efficiency is not high, and the latent heat in oil shale semi-coke (fixed carbon) does not utilize.The granule destructive distillation device of domestic research in nearly 2 years has two kinds, and a kind of is the DG technology of Dalian University of Technology, is take solid as thermal barrier, but not yet builds up the industrial experiment device; The second is oil shale fluidized bed dry distillation and the decarbonization process that Shanghai Bo Sheng company develops, and the powdery resinous shale contacts with the high-temperature gas thermal barrier, fluidized retoring, but need resinous shale is crushed to the following particle diameter of 0.3mm, apparatus and process is complicated.
CN200810228892. disclose a kind of gas retort with vibrating bed, resinous shale advances by turning back with vibrating bed in gas retort and gaseous heat-carrier is repeatedly carrying out destructive distillation under the mixed flow operating mode.This device adopts thermal circulation gas and resinous shale to carry out heat exchange, and a part of heat externally scatters and disappears in the pipeline circulation, and heat utilization ratio is low, and device structure is complicated.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of granule wax shale low-temperature pyrolysis technique based on walking beam furnace, dry distillation gas can be used as the fuel of gas fired radiant tubes, save the cost of oil shale distillation, used the heat accumulation type radiant tube heat supply to have the dual superiority of Nox quantity discharged in energy-conservation and decrease flue gas significantly.
In order to achieve the above object, the technical scheme taked of the present invention is:
A kind of granule wax shale low-temperature pyrolysis technique based on walking beam furnace comprises the following steps:
The first step enters walking beam furnace with the resinous shale material of 0～10mm by feeding unit;
Second step, resinous shale material are sent into dryer section and are carried out drying along with the promotion of stepped start-stop system material bed, from the radiant heat of heat radiation tube firing system, with heating material to 180 degree～200 degree, complete the drying and dehydrating of resinous shale material, the water vapor that removes and hot flue gas are discharged through after cooling purifier;
The 3rd step, resinous shale material after drying enters the carbonization section, by the radiant heat from the heat radiation tube firing system, with heating material to 480 degree～500 degree, make the pyrolysis of resinous shale material, produce shale oil gas, dry distillation gas and semicoke product, the semicoke product is along with the material bed enters the waste heat recovery section;
The 4th step, the shale oil gas and the dry distillation gas that obtain after destructive distillation, through desulfurization washing tower purify, cooling tower is cooled to that 50 degree are following, the separation method of gas-liquid separator and electrical tar precipitator, obtains shale oil and cooled coal gas;
In the 5th step, cooled coal gas enters the waste heat recovery section, with in destructive distillation product semicoke become heating gas after the exhaust-heat absorption of being with, pass into the fuel that the heat radiation tube firing system is used as this system;
The 6th step turned cold through the semicoke product of waste heat recovery, along with the material bed enters discharging bin, completed the destructive distillation of resinous shale material.
The present invention for the type of furnace be walking beam furnace, whole retort process is carried out in airtight body of heater, adopt tightness system to separate between each process section of walking beam furnace, avoid each intersegmental gas to influence each other, guarantee the stable of each intersegmental working temperature, utilize the regenerative gas radiotechnology that material is heated, and control oxygen content in stove, guarantee production process safety with this.
The present invention has adopted dry materials to separate with pyrolysis, guarantees that dry distillation gas concentration is not subjected to the impact of the useless flue gas of dryer section, guarantees that gas concentration can make the heat radiation tube firing system successfully light a fire.
The present invention adopts the heat radiation tube combustion technology as the type of heating of material, compares the type of heating of gaseous heat-carrier, can more effective control stove in the content of oxygen, security is higher, the dry distillation gas concentration of generation is also higher.
The present invention enters the waste heat recovery section through cooled dry distillation gas, and reclaiming becomes heating gas after high temperature semicoke waste heat and send into heat radiation tube uses that act as a fuel, and reduces coal gas purification and accumulating link.
Technique of the present invention is simple, energy consumption is low, pollution-free, product quality is high, coordinates walking beam furnace can realize large-scale industrialization production, is easy to spread.
Description of drawings
Accompanying drawing is process flow sheet of the present invention.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
With reference to accompanying drawing, a kind of granule wax shale low-temperature pyrolysis technique based on walking beam furnace comprises the following steps:
The first step enters walking beam furnace with the resinous shale material of 0～10mm by feeding unit;
Second step, resinous shale material are sent into dryer section and are carried out drying along with the promotion of stepped start-stop system material bed, from the radiant heat of heat radiation tube firing system, with heating material to 180 degree～200 degree, complete the drying and dehydrating of resinous shale material, the water vapor that removes and hot flue gas are discharged through after cooling purifier;
The 3rd step, resinous shale material after drying enters the carbonization section, by the radiant heat from the heat radiation tube firing system, with heating material to 480 degree～500 degree, make the pyrolysis of resinous shale material, produce shale oil gas, dry distillation gas and semicoke product, the semicoke product is along with the material bed enters the waste heat recovery section;
The 4th step, the shale oil gas and the dry distillation gas that obtain after destructive distillation, through desulfurization washing tower purify, cooling tower is cooled to that 50 degree are following, the separation method of gas-liquid separator and electrical tar precipitator, obtains shale oil and cooled coal gas;
In the 5th step, cooled coal gas enters the waste heat recovery section, with in destructive distillation product semicoke become heating gas after the exhaust-heat absorption of being with, pass into the fuel that the heat radiation tube firing system is used as this system;
The 6th step turned cold through the semicoke product of waste heat recovery, along with the material bed enters discharging bin, completed the destructive distillation of resinous shale material.
The present invention enters the waste heat recovery section through cooled dry distillation gas, and reclaiming becomes heating gas after high temperature semicoke waste heat and send into heat radiation tube uses that act as a fuel, and reduces coal gas purification and accumulating link.
The present invention adopts the heat radiation tube combustion technology as the type of heating of material, compares the type of heating of gaseous heat-carrier, can more effective control stove in the content of oxygen, security is higher, the dry distillation gas concentration of generation is also higher.
Claims (1)
1. the granule wax shale low-temperature pyrolysis technique based on walking beam furnace, is characterized in that, comprises the following steps:
The first step enters walking beam furnace with the resinous shale material of 0～10mm by feeding unit;
Second step, resinous shale material are sent into dryer section and are carried out drying along with the promotion of stepped start-stop system material bed, from the radiant heat of heat radiation tube firing system, with heating material to 180 degree～200 degree, complete the drying and dehydrating of resinous shale material, the water vapor that removes and hot flue gas are discharged through after cooling purifier;
The 3rd step, resinous shale material after drying enters the carbonization section, by the radiant heat from the heat radiation tube firing system, with heating material to 480 degree～500 degree, make the pyrolysis of resinous shale material, produce shale oil gas, dry distillation gas and semicoke product, the semicoke product is along with the material bed enters the waste heat recovery section;
The 4th step, the shale oil gas and the dry distillation gas that obtain after destructive distillation, through desulfurization washing tower purify, cooling tower is cooled to that 50 degree are following, the separation method of gas-liquid separator and electrical tar precipitator, obtains shale oil and cooled coal gas;
In the 5th step, cooled coal gas enters the waste heat recovery section, with in destructive distillation product semicoke become heating gas after the exhaust-heat absorption of being with, pass into the fuel that the heat radiation tube firing system is used as this system;
The 6th step turned cold through the semicoke product of waste heat recovery, along with the material bed enters discharging bin, completed the destructive distillation of resinous shale material.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103333705A (en) * | 2013-06-27 | 2013-10-02 | 中国重型机械研究院股份公司 | Zero-heat carrier powdered coal low-temperature dry distillation carbonization method |
| CN103952165A (en) * | 2014-04-01 | 2014-07-30 | 中国重型机械研究院股份公司 | Multilayer rotary kiln based small granular material destructive distillation method |
| CN107841330A (en) * | 2017-11-14 | 2018-03-27 | 松原市宁江区松城废旧资源再生利用有限公司 | The smelting system and its circulation smelting process of a kind of little particle oil shale |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277185A (en) * | 2011-07-19 | 2011-12-14 | 吴道洪 | Method for pyrolyzing coal by utilizing heat accumulating type revolving furnace |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277185A (en) * | 2011-07-19 | 2011-12-14 | 吴道洪 | Method for pyrolyzing coal by utilizing heat accumulating type revolving furnace |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103333705A (en) * | 2013-06-27 | 2013-10-02 | 中国重型机械研究院股份公司 | Zero-heat carrier powdered coal low-temperature dry distillation carbonization method |
| CN103333705B (en) * | 2013-06-27 | 2015-01-28 | 中国重型机械研究院股份公司 | Zero-heat carrier powdered coal low-temperature dry distillation carbonization method |
| CN103952165A (en) * | 2014-04-01 | 2014-07-30 | 中国重型机械研究院股份公司 | Multilayer rotary kiln based small granular material destructive distillation method |
| CN103952165B (en) * | 2014-04-01 | 2016-01-20 | 中国重型机械研究院股份公司 | A kind of small particles material method for destructive distillation based on multilayer rotary kiln |
| CN107841330A (en) * | 2017-11-14 | 2018-03-27 | 松原市宁江区松城废旧资源再生利用有限公司 | The smelting system and its circulation smelting process of a kind of little particle oil shale |
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Application publication date: 20130508 |