CN102304375A - Oil sand/shale fluidized retorting method and system used thereby - Google Patents
Oil sand/shale fluidized retorting method and system used thereby Download PDFInfo
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- CN102304375A CN102304375A CN201110237604A CN201110237604A CN102304375A CN 102304375 A CN102304375 A CN 102304375A CN 201110237604 A CN201110237604 A CN 201110237604A CN 201110237604 A CN201110237604 A CN 201110237604A CN 102304375 A CN102304375 A CN 102304375A
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Abstract
The invention relates to technical field of oil sand retorting, in particular to an oil sand/shale fluidized retorting method, which comprises the following steps: (1) inputting fuel gas into an igniter, burning, delivering oil sand/shale into the reactor through a screw propeller, and allowing the oil sand/shale to rise to a settling section with hot gas to undergo low-temperature retorting; and (2) performing gas-solid separation of oil sand/shale and retorting gas above the settling section of the reactor, allowing the retorted oil sand/shale solid material to flow to a mobile bed section from a return pipe, and performing the gas-solid separation of the retorting gas led out from the top of the reactor. The system used by the method comprises a screw propeller (2), a reactor (3), a primary cyclone separator (4), a secondary cyclone separator (5), an external cyclone separator (6), an igniter (12), a gas distributor (14), a scrubbing tower (7), a heat exchanger (10), an oil storage tank (8) and a heating furnace (9). The method and the system are very practical and environment-friendly and are convenient for industrial production.
Description
Technical field
the invention belongs to oil-sand/shale retorting technical field, the system that relates in particular to a kind of oil-sand/shale fluidized retoring method and adopted.
Background technology
in recent years; That International Crude Oil continues is high, petroleum demand is constantly soaring, conventional oil resource overexploitation and consumption problem become increasingly conspicuous; Along with century economy the demand of oil is constantly increased; The conventional oil resource can not satisfy the quick growth of petroleum demand, therefore must improve the processing and utilization degree to the non-conventional oil resource.
oil-sand; Claiming tar sand or Tar sands again, belong to the non-conventional oil resource, is a kind of sand or sandstone that contains pitch or tar; The mixture of normally forming by sand, pitch, mineral substance, clay and water; Wherein asphalt content 3%～20%, sand and clay comprises 80%～85%, and water accounts for 3%～6%.Oil-sand distributes extensively in the world, and the oil-sand resource accounts for 30% of prospective oil, and reserves are quite abundant.China is one of abundant country of oil-sand ore resources.
resinous shale belongs to unconventional petroleum resources, is classified as the very important energy of taking over of 21 century with the feasibility of rich in natural resources, favourable characteristic and development and use.At present; China mainly adopts retorting technique that the bulk resinous shale is extracted shale oil; As tailing, also do not find effective means to carry shale oil wherein for the remaining granule wax shale of destructive distillation factory, tiny shale utilization becomes the bottleneck of restriction shale retorting technology.The shale particle synthesis utilization ratio that granularity is little is low, causes small grain size shale to overstock in a large number and environmental pollution.
are the production technique of oil-sand/shale relatively, and the following process technology of existing oil-sand/shale is relatively backward, and cost is higher, and environmental problem is more outstanding.
Summary of the invention
the present invention be intended to overcome the weak point of prior art and provide a kind of practical, and environmental protection efficacy is remarkable, is convenient to the oil-sand/shale fluidized retoring method of suitability for industrialized production.
the present invention also provides a kind of oil-sand/shale fluidized retoring system that matches with aforesaid method.
are for achieving the above object; The present invention is achieved in that a kind of oil-sand/shale fluidized retoring method; Can implement as follows: (1) with burning in coal mine gas and the oxygen-rich air mixing gas input burner, the hot gas that burning produces gets into the transportation section in the reactor drum; Through spiral propeller granularity is sent in the reactor drum less than oil-sand/shale of 20mm, made oil-sand/shale in said reactor drum, carry out fluidized retoring, pyrolysis temperature is controlled at 500～550 ℃; It is settlement separate that oil-sand/shale that continue to rise and destructive distillation gas carry out gas-solid on reactor drum top, and methane gas is derived from reactor head, carries out gas solid separation again by the external cyclone water-separator of reactor head; Oil-sand/shale solid substances then is back to the transportation section in the reactor drum through reflux line; (2) the destructive distillation gas of the said external cyclone water-separator output of step (1) is isolated oil fuel and dust product through the tower washing of giving a dinner of welcome, and said oil fuel and dust separation product importing collection mud jar are carried out the greasy filth separation; The destructive distillation gas that the tower of giving a dinner of welcome is derived is delivered in the storage tank after the interchanger heat exchange, to realize separating of lightweight oil and coal mine gas.
as a kind of preferred version, the present invention is in step (2), and the outlet of storage tank coal mine gas divides two-way, and one the tunnel gets into burner and oxygen-rich air burning; Another road gets into fluid bed section in the reactor drum after the process furnace heating.
as another kind of preferred version, when the present invention gave a dinner of welcome the tower washing, washing composition was after the interchanger heat exchange, and closed loop is back to the dust suction top of tower again.
oil-sand/shale fluidized retoring system that above-mentioned oil-sand/shale fluidized retoring method is adopted, it comprises spiral propeller, reactor drum, places primary cyclone and secondary cyclone, external cyclone water-separator, burner, the tower of giving a dinner of welcome, interchanger and storage tank in the reactor drum; The discharge port of said spiral propeller communicates with the feeding mouth of reactor drum; In said reactor drum, be provided with dust catcher in the bottom of primary cyclone and the outlet of secondary cyclone dipleg; The air outlet, top of said external cyclone water-separator communicates with the air intake of the tower of giving a dinner of welcome; The air outlet of the said tower of giving a dinner of welcome communicates with the feeding mouth of storage tank through interchanger.
as a kind of preferred version, the present invention also is provided with process furnace; The air outlet, top one tunnel of said storage tank communicates with the air intake of process furnace, and its another road communicates with the inlet mouth of burner; Said process furnace air outlet communicates with reactor drum fluidisation bed section circulating mash gas gas feedback inlet.
as another kind of preferred version, the present invention also is provided with the oil-sand kibbler; The discharge port of said oil-sand kibbler communicates with the feeding mouth of spiral propeller.
further, the outlet of the oil-sand of external cyclone water-separator of the present invention/shale solid substances communicates with the transportation section of reactor drum.
further, the bottom wash agent of the tower of giving a dinner of welcome according to the invention outlet enters the mouth with the upper wash agent of the tower of giving a dinner of welcome through interchanger and communicates.
in addition, burner according to the invention comprises the combustion chamber; In said combustion chamber, near exhanst gas outlet, be provided with flame seal.
secondly, the present invention is fixed with gas distributor in the transportation section in said reactor drum; Said gas distributor comprises the person in charge, arm and take-off pipe; The axis of said arm and take-off pipe is in same plane and associated vertical; The said person in charge, arm and take-off pipe communicate.
oil-sand/shale fluidized retoring system and technology that the present invention designed; Owing to adopt the circulating fluid bed reactor that has burner, built-in cyclonic separator and external cyclone water-separator; The hot gas that water vapour that feeds and burner produce gets in the reactor drum and makes oil-sand/shale fluidisation, and part hot gas and oil-sand burning are arranged, and forms the heat supply simultaneously of hot body thermal barrier and solid thermal carriers; Oil-sand/shale was heated up rapidly in 10 minutes; Carry out low-temperature pyrolysis at 450 ℃～550 ℃, the destructive distillation gas of generation is through washing, and cooling liquefaction is directly delivered to oil tank as crude oil applications.
the present invention adopts the built-up type design of simple unique technical maturity, have practical, eco-friendly characteristics, easy to utilize.Day output can be from 100 tons to 5000 tons, and semicoke can be used for the cement mill raw material, and does not have contaminated wastewater, compliance with environmental protection requirements.
Description of drawings
are described further the present invention below in conjunction with accompanying drawing and embodiment.
Fig. 1 is an one-piece construction synoptic diagram of the present invention.
Fig. 2 is a gas distributor structural representation of the present invention.
Fig. 3 is a burner structure synoptic diagram of the present invention.
Among
figure, 1, hopper; 2, spiral propeller; 3, reactor drum; 4, primary cyclone; 5, secondary cyclone; 6, external cyclone water-separator; 7, the tower of giving a dinner of welcome; 8, storage tank; 9, process furnace; 10, interchanger; 11, interchanger; 12, gas dispatch machine; 13, ash collection slot; 14, gas distributor; 15, burner; 16, dipleg; 17, dipleg; 18, travelling belt; 19, kibbler; 20, collection mud jar; 21, dust catcher; 22, combustion chamber; 23, burning gas inlet; 24, pressure release valve; 25, flame seal; 26, exhanst gas outlet; 28, be responsible for; 29, arm; 30, take-off pipe; 31, gas jet.
Embodiment
are as shown in the figure, and oil-sand/shale fluidized retoring method can be implemented as follows: (1) with burning in coal mine gas and the oxygen-rich air mixing gas input burner 15, the hot gas that burning produces gets into the transportation section in the reactor drum 3; Through spiral propeller 2 granularity is sent in the reactor drum 3 less than oil-sand/shale of 20mm, made oil-sand/shale in said reactor drum 3, carry out fluidized retoring, pyrolysis temperature is controlled at 500～550 ℃; It is settlement separate that oil-sand/shale that continue to rise and destructive distillation gas carry out gas-solid on reactor drum 3 tops, and methane gas is derived from reactor drum 3 tops, carries out gas solid separation again by the external cyclone water-separator at reactor drum 3 tops; Oil-sand/shale solid substances then is back to the transportation section in the reactor drum 3 through reflux line; (2) the destructive distillation gas of the said external cyclone water-separator output of step (1) is isolated oil fuel and dust product through tower 7 washings of giving a dinner of welcome, and said oil fuel and dust separation product importing collection mud jar 20 are carried out the greasy filth separation; The destructive distillation gas that the tower 7 of giving a dinner of welcome is derived is delivered in the storage tank 8 after interchanger 10 heat exchange, to realize separating of lightweight oil and coal mine gas.
the present invention is in step (2), and the outlet of storage tank 8 coal mine gas divides two-way, and one the tunnel gets into burner 15 and oxygen-rich air burning; Another road gets into fluid bed section in the reactor drum 3 after process furnace 9 heating.
When
the present invention gave a dinner of welcome tower 7 washings, washing composition was after interchanger 11 heat exchange, and closed loop is back to dust suction tower 7 tops again.
oil-sand/shale fluidized retoring system that above-mentioned oil-sand/shale fluidized retoring method is adopted, it comprises spiral propeller 2, reactor drum 3, places primary cyclone 4 and secondary cyclone 5, external cyclone water-separator 6, burner 15, the tower 7 of giving a dinner of welcome, interchanger 10 and storage tank 8 in the reactor drum 3; The discharge port of said spiral propeller 2 communicates with the feeding mouth of reactor drum 3; In said reactor drum 3, be provided with dust catcher 21 in the bottom of primary cyclone 4 and the outlet of secondary cyclone 5 diplegs; The air outlet, top of said external cyclone water-separator 6 communicates with the air intake of the tower 7 of giving a dinner of welcome; The air outlet of the said tower 7 of giving a dinner of welcome communicates through the feeding mouth of interchanger 10 with storage tank 8.
the present invention also is provided with process furnace 9; The air outlet, top one tunnel of said storage tank 8 communicates with the air intake of process furnace 9, and its another road communicates with the inlet mouth of burner 15; Said process furnace 9 air outlets communicate with reactor drum 3 fluid bed section circulating mash gas gas feedback inlet.
referring to Fig. 1, the present invention also is provided with oil-sand/shale pulverizer 19; The discharge port of said oil-sand/shale pulverizer 19 communicates with the feeding mouth of spiral propeller 2.
The oil-sand of
external cyclone water-separator 6 of the present invention/shale solid substances outlet communicates with the transportation section of reactor drum 3.
The bottom wash agent outlet of
tower 7 of giving a dinner of welcome according to the invention communicates with the upper wash agent inlet of the tower 7 of giving a dinner of welcome through interchanger 11.
referring to Fig. 3, burner 15 according to the invention comprises combustion chamber 22; In said combustion chamber 22, near exhanst gas outlet 26, be provided with flame seal 25.23 are the burning gas inlet, and 24 is pressure release valve.
referring to Fig. 2, the present invention is fixed with gas distributor 14 in the transportation section in said reactor drum 3; Said gas distributor 14 comprises the person in charge 28, arm 29 and take-off pipe 30; Said arm 29 is in same plane and associated vertical with the axis of take-off pipe 30; The said person in charge 28, arm 29 and take-off pipe 30 communicate.31 is gas jet.
system of the present invention mainly comprises three parts: 1, feed system; 2 distillation systems; 3, recovery system.
one, feed system.
feed system mainly adopts spiral conveying mechanism to accomplish the transportation of raw material thing, and it is made up of crusher, rotary conveyor, oil-sand storage tank and screw feeder.
two, distillation system.
fluidized reactor; The top of this reactor drum is a settling section; The bottom is a fluid bed section; The fluid bed section bottom is the expanded bed section, and the expanded bed pars infrasegmentalis is the transportation section, and the bottom of described fluidized reactor is provided with burner, preheating chamber and gas distributor from bottom to top; Fluid bed section and expanded bed section sidewall on gas distributor top are provided with spiral propeller; Be provided with built-in cyclonic separator on described settling section top, the bottom of this built-in cyclonic separator has to draw under the solid material reflux line and is passed in the transportation section, after the isolated destructive distillation gas of described built-in cyclonic separator is drawn by the top of reactor drum, is input to external cyclone water-separator.
three, recovery system.
recovery system is made up of the tower of giving a dinner of welcome, hot tube heat exchanger, storage tank and process furnace;, after the tower of giving a dinner of welcome is given a dinner of welcome, after the interchanger heat exchange, be input to storage tank again and isolate coal mine gas and lightweight oil by built-in and the isolated destructive distillation gas of external cyclone water-separator.The part coal mine gas is used for burner combustion, and the part coal mine gas is transported to the gas retort fluid bed section through the process furnace heating and is used for oil-sand/shale fluidisation carrier.
oil-sand distillation process of the present invention is following.
(1) (combustion-supporting gas is oxygen rich air air, wherein O with combustion gas and combustion-supporting gas
2
Volumn concentration be 30～50%.) burner combustion of input fluidized reactor, the hot gas that burning is produced gets into the transportation section through gas distributor, through described spiral propeller with granularity does simultaneously; The oil-sand of 20mm, shale are sent in the reactor drum; Make the burning of the concurrent first portion of oil-sand/shale fluidisation in fluid bed section and be rapidly heated; Rise to settling section with hot gas then and produce low-temperature pyrolysis, pyrolysis temperature is controlled at 500～550 ℃, and the oil-sand/shale and the destructive distillation gas that continue to rise carry out gas solid separation on settling section top through built-in cyclonic separator; Isolated destructive distillation gas is derived from reactor head; Oil-sand after the destructive distillation/shale solid materials then is back to the transportation section through reflux line, derives destructive distillation gas by reactor head and isolates dust wherein through external cyclone water-separator again, exports cleaner destructive distillation gas; The dust that is separated directly enters into the transportation section of reactor drum, and the semicoke that produces after oil-sand/shale retorting is discharged outside the reactor drum through set spiral propeller in reactor drum.
Wash through the tower of giving a dinner of welcome from the destructive distillation gas of above-mentioned external cyclone water-separator output
(2), passes through the hot tube heat exchanger heat exchange again, and the input storage tank is isolated lightweight oil and coal mine gas.The part coal mine gas is used for burner combustion, and the part coal mine gas is transported to reactor drum fluidisation bed section through the process furnace heating and is used for oil-sand/shale fluidisation carrier.
referring to Fig. 1, and the present invention is that oil-sand, the shale of 100mm is pulverized < through described crusher with size; 20mm; Send into the oil-sand storage tank through rotary conveyor; Again in spiral propeller is input to reactor drum, and coal mine gas, oxygen rich air mixed the input burner combustion by a certain percentage, the hot gas of generation gets into reactor drum through gas distribution grid; Oil-sand is rapidly heated to 500 ℃ in the concurrent living burning of reactor drum fluidisation; Oil-sand rises to settling section with hot gas and produces destructive distillation gas, the oil-sand that continues to rise and destructive distillation gas on settling section top after built-in multiple cyclone separates destructive distillation gas derive by reactor head, the oil-sand after the destructive distillation expects then to be back to the transportation section by the reflux line of cyclonic separator admittedly; The semicoke that produces after the destructive distillation is discharged reactor drum through spiral propeller and is got into ash collection slot outward, and uses water for cooling.The destructive distillation gas of being derived by reactor top is introduced external cyclone water-separator and is gone out dust, and dust gets into the transportation section of reactor drum through the dipleg of the bottom of this external cyclone water-separator.After the tower washing of giving a dinner of welcome, through the interchanger heat exchange, be sent to container for storing liquid by the isolated destructive distillation gas of external cyclone water-separator again.Do not coagulate the fluidizing medium that coal mine gas partly is used for fluid bed section, part is used for the combustion material of lighter for ignition.
are with being appreciated that; More than about specific descriptions of the present invention; Only be used to the present invention is described and be not to be subject to the described technical scheme of the embodiment of the invention; Those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention, to reach identical technique effect; As long as satisfy the use needs, all within protection scope of the present invention.
Claims (10)
1. oil-sand/shale fluidized retoring method is characterized in that, implements as follows:
(1) with burning in coal mine gas and the oxygen-rich air mixing gas input burner (15), the hot gas that burning produces gets into the transportation section in the reactor drum (3); Through spiral propeller (2) granularity is sent in the reactor drum (3) less than oil-sand/shale of 20mm, made oil-sand/shale in said reactor drum (3), carry out fluidized retoring, pyrolysis temperature is controlled at 500～550 ℃; It is settlement separate that oil-sand/shale that continue to rise and destructive distillation gas carry out gas-solid on reactor drum (3) top, and methane gas is derived from reactor drum (3) top, carries out gas solid separation again by the external cyclone water-separator at reactor drum (3) top; Oil-sand/shale solid substances then is back to the transportation section in the reactor drum (3) through reflux line;
(2) the destructive distillation gas of the said external cyclone water-separator output of step (1) is isolated oil fuel and dust product through the tower of giving a dinner of welcome (7) washing, and said oil fuel and dust separation product importing collection mud jar (20) are carried out the greasy filth separation; The destructive distillation gas that the tower (7) of giving a dinner of welcome is derived is delivered in the storage tank (8) after interchanger (10) heat exchange, to realize separating of lightweight oil and coal mine gas.
2. oil-sand according to claim 1/shale fluidized retoring method is characterized in that: in step (2), the outlet of storage tank (8) coal mine gas divides two-way, and one the tunnel gets into burner (15) and oxygen-rich air burning; Another road gets into fluid bed section in the reactor drum (3) after process furnace (9) heating.
3. oil-sand according to claim 2/shale fluidized retoring method is characterized in that: during the tower of giving a dinner of welcome (7) washing, washing composition is after interchanger (11) heat exchange, and closed loop is back to dust suction tower (7) top again.
4. oil-sand/shale fluidized retoring system that oil-sand as claimed in claim 1/shale fluidized retoring method is adopted; It is characterized in that, comprise spiral propeller (2), reactor drum (3), place primary cyclone (4) and secondary cyclone (5), external cyclone water-separator (6), burner (15), the tower of giving a dinner of welcome (7), interchanger (10) and storage tank (8) in the reactor drum (3); The discharge port of said spiral propeller (2) communicates with the feeding mouth of reactor drum (3); In said reactor drum (3), be provided with dust catcher (21) in the bottom of primary cyclone (4) and the outlet of secondary cyclone (5) dipleg; The air outlet, top of said external cyclone water-separator (6) communicates with the air intake of the tower of giving a dinner of welcome (7); The air outlet of the said tower of giving a dinner of welcome (7) communicates through the feeding mouth of interchanger (10) with storage tank (8).
5. oil-sand according to claim 4/shale fluidized retoring system is characterized in that: also be provided with process furnace (9); The air outlet, top one tunnel of said storage tank (8) communicates with the air intake of process furnace (9), and its another road communicates with the inlet mouth of burner (15); Said process furnace (9) air outlet communicates with reactor drum (3) fluid bed section circulating mash gas gas feedback inlet.
6. oil-sand according to claim 5/shale fluidized retoring system is characterized in that: also be provided with oil-sand kibbler (19); The discharge port of said oil-sand kibbler (19) communicates with the feeding mouth of spiral propeller (2).
7. oil-sand according to claim 6/shale fluidized retoring system is characterized in that: the oil-sand of external cyclone water-separator (6)/shale solid substances outlet communicates with the transportation section of reactor drum (3).
8. according to the arbitrary described oil-sand/shale fluidized retoring system of claim 5～7, it is characterized in that: the bottom wash agent outlet of the said tower of giving a dinner of welcome (7) communicates with the upper wash agent inlet of the tower of giving a dinner of welcome (7) through interchanger (11).
9. oil-sand according to claim 8/shale fluidized retoring system is characterized in that: said burner (15) comprises combustion chamber (22); In said combustion chamber (22), near exhanst gas outlet (26), be provided with flame seal (25).
10. oil-sand according to claim 9/shale fluidized retoring system is characterized in that: the transportation section is fixed with gas distributor (14) in said reactor drum (3); Said gas distributor (14) comprises the person in charge (28), arm (29) and take-off pipe (30); Said arm (29) is in same plane and associated vertical with the axis of take-off pipe (30); The said person in charge (28), arm (29) and take-off pipe (30) communicate.
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| CN201110237604A CN102304375A (en) | 2011-08-18 | 2011-08-18 | Oil sand/shale fluidized retorting method and system used thereby |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103420555A (en) * | 2013-08-01 | 2013-12-04 | 中国大唐集团科学技术研究院有限公司 | Oil sludge treating system and method |
| CN103450919A (en) * | 2013-09-09 | 2013-12-18 | 山东天力干燥股份有限公司 | Oil sand calcining device and an oil sand calcining process |
| CN106766682A (en) * | 2016-12-29 | 2017-05-31 | 安徽今朝环保科技有限公司 | A kind of abraum salt drying and incinerating purifier based on radiation rotary drying |
| CN107629809A (en) * | 2017-11-03 | 2018-01-26 | 北京神雾电力科技有限公司 | A kind of wall-hanging rapid pyrolysis apparatus |
| CN109536192A (en) * | 2017-09-22 | 2019-03-29 | 中国石油天然气股份有限公司 | A kind of oil-sand fluid coking system and oil-sand fluid coking method |
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| US4152245A (en) * | 1977-12-02 | 1979-05-01 | Atlantic Richfield Company | Separation of rock solids from heat carriers in an oil shale retorting process |
| CN101280200A (en) * | 2008-06-04 | 2008-10-08 | 珠海拓普能源科技有限公司 | Dry distillation system for directly producing gasoline and diesel oil from oil shale(coal), process thereof |
| CN101475815A (en) * | 2008-11-25 | 2009-07-08 | 中国石油大学(北京) | Dry distillation method for oil shale material and fluidized bed dry distillation apparatus |
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| US4152245A (en) * | 1977-12-02 | 1979-05-01 | Atlantic Richfield Company | Separation of rock solids from heat carriers in an oil shale retorting process |
| CN101280200A (en) * | 2008-06-04 | 2008-10-08 | 珠海拓普能源科技有限公司 | Dry distillation system for directly producing gasoline and diesel oil from oil shale(coal), process thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103420555A (en) * | 2013-08-01 | 2013-12-04 | 中国大唐集团科学技术研究院有限公司 | Oil sludge treating system and method |
| CN103420555B (en) * | 2013-08-01 | 2015-07-15 | 中国大唐集团科学技术研究院有限公司 | Oil sludge treating system and method |
| CN103450919A (en) * | 2013-09-09 | 2013-12-18 | 山东天力干燥股份有限公司 | Oil sand calcining device and an oil sand calcining process |
| CN106766682A (en) * | 2016-12-29 | 2017-05-31 | 安徽今朝环保科技有限公司 | A kind of abraum salt drying and incinerating purifier based on radiation rotary drying |
| CN109536192A (en) * | 2017-09-22 | 2019-03-29 | 中国石油天然气股份有限公司 | A kind of oil-sand fluid coking system and oil-sand fluid coking method |
| CN109536192B (en) * | 2017-09-22 | 2021-03-09 | 中国石油天然气股份有限公司 | Oil sand fluid coking system and oil sand fluid coking method |
| CN107629809A (en) * | 2017-11-03 | 2018-01-26 | 北京神雾电力科技有限公司 | A kind of wall-hanging rapid pyrolysis apparatus |
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Application publication date: 20120104 |