CN102240608B - Coal ash flotation separation equipment provided with reflection cone gas dispersing device - Google Patents
Coal ash flotation separation equipment provided with reflection cone gas dispersing device Download PDFInfo
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- CN102240608B CN102240608B CN 201110156555 CN201110156555A CN102240608B CN 102240608 B CN102240608 B CN 102240608B CN 201110156555 CN201110156555 CN 201110156555 CN 201110156555 A CN201110156555 A CN 201110156555A CN 102240608 B CN102240608 B CN 102240608B
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Abstract
The invention discloses coal ash flotation separation equipment provided with a reflection cone gas dispersing device, comprising a barrel which is vertically arranged, an overflow collecting section arranged at the top and a tail ash collecting section arranged at the bottom; a gas dispersing device arranged in the barrel; multiple flotation plates which are arranged in the barrel at intervals; a distributing device arranged at the upper part of the overflow collecting section; and a gas supply device communicated with multiple gas holes on the gas dispersing device by virtue of a first gas pipeline. The invention has the advantages that: 1, bubbles combined with carbon granules are reflected to more angles by virtue of a cone-shaped gas dispersing device, and the reflecting effect is better than that of planar reflection; 2, the gas dispersing device jets gas to drive the bubbles to scatter and float in the barrel in a turbulent state, thus better flotation effect is achieved; and 3, the bubbles which do not penetrate through the flotation plates are reflected by the cone-shaped gas dispersing device, thus the effect of turbulent motion is enhanced and the floatation efficiency is improved.
Description
Technical field
The present invention relates to a kind of flyash that utilizes and make the flyash FLOTATION SEPARATION equipment that active carbon adopts, more particularly, the present invention relates to a kind of flyash FLOTATION SEPARATION equipment that has the diffusing device of air of reflection cone bucket.
Background technology
Flyash is one of bigger industrial residue of the current discharge capacity of China, present stage China's year bed drain purge reached 3,000 ten thousand tons.Along with development of electric power industry, the flyash discharge capacity of coal-burning power plant increases year by year.Contain a large amount of unburned carbon granules in the flyash, after flotation, can be used as the raw material of making active carbon.
Chinese patent 200810031474.7 discloses a kind of flotation pillar special for fly ash, at flotation column cylindrical shell top pulp distributer is housed, establish multilayer bubbling plate in the cylindrical shell, multiple spot swirl-flow devices and multiple spot tail ash spout hole are established in the cylindrical shell bottom, install the ore pulp distributing pipe around the pulp distributer, cylindrical shell peripheral device circulating line, the circulating line upper end connects with the ore pulp distributing pipe, lower end and swirl-flow devices connect, ore pulp distributing pipe interface is connected the circulating pump two ends respectively with feed inlet and outlet, the high-carbon balanced overflow plate of ash and high-carbon ash overflow collection mouth also are housed on flotation column top, and tail ash spout hole is connected and installed with tail ash automatic control stuff box by pipeline.The shortcoming of this scheme is to adopt the multiple spot swirl-flow devices to make ore pulp produce eddy flow, has influenced the flotation effect of ore pulp.
Chinese patent 200920064391.8 discloses a kind of CFBB flotation pillar special for fly ash, at the top pulp distributer is housed, in establish multilayer bubbling plate, the multiple spot swirl-flow devices is established in the bottom, the bottom is connected and installed taper tail ash feeder, install the ore pulp distributing pipe around the pulp distributer, the peripheral device circulating line, the ore pulp distributing pipe connects circulating pump, the high-carbon balanced overflow plate of ash also is housed on flotation column top and collects mouth, the tail ash tube road that its bottom of taper tail ash feeder connects is connected to tail ash automatic control stuff box.The same with last scheme, this scheme is owing to adopt swirl-flow devices, and the flotation effect of ore pulp is undesirable.
Chinese patent 200920261379.6 discloses a kind of garbage microwave pyrolysis and has produced the stirring floatation equipment that active carbon uses; This stirring floatation equipment comprises: body part F, power section G and stirring flotation section H.Body part F comprises: stir flotation cylinder, frame, the outlet of flotation thing and mixture outlet, power section G comprises: stir the flotation motor and stir the flotation axle, stir the flotation motor and be fixedly installed on the described frame, stir the flotation motor and be connected with stirring flotation axle.Stirring the flotation section H comprises: stirring vane and flotation blade, stirring vane are fixedly installed on described stirring flotation axle bottom, and the flotation vanes fixed is arranged on described stirring flotation axle top.
Chinese patent 200920063583.7 discloses a kind ofly produces the new equipment of active carbon with flyash, comprises that the former ash of flyash that connects successively advances ash bucket, electronic measuring scale, box tube blower, ore pulp preprocessor, first order flotation column, second level flotation column, first thickener, first filter, first dryer, the special-purpose mill of active carbon, oil water separator, second dryer; Ore pulp preprocessor and second level flotation column also are connected with the automatic medicament feeding machine of dispersant and composite floating chemical, and the special-purpose mill of active carbon also is connected with the high steam pipeline.
Chinese patent 200820046239.2 discloses a kind of flyash flotation charcoal process units, flyash flotation charcoal process units comprises the screening module that can screen the flyash granularity, stirs module, can cleaned coal and tail ash content from flotation module, dehydration module and the conveying mechanism that becomes integral body with upper module organic connections successively.
Technique scheme adopts swirl-flow devices that bubble is moved upward with the eddy flow state mostly, and its flotation effect is undesirable.
Summary of the invention
At the shortcoming of prior art, the purpose of this invention is to provide a kind of FLOTATION SEPARATION equipment that fly ash grain and bubble are moved with turbulent condition.
To achieve these goals, the invention provides a kind of loose flyash FLOTATION SEPARATION equipment of device of air of reflection cone bucket that has, the cylindrical shell that it comprises vertical setting is positioned at the overflow collection section at this cylindrical shell top and is positioned at the tail ash collection section of this cylindrical shell bottom; The overflow collection section is provided with discharging opening, and tail ash collection section is provided with the outlet of tail ash; This FLOTATION SEPARATION equipment further comprises:
Be positioned at the diffusing device of air of cylindrical shell, the surface of this diffusing device of air is bigger, is used for bubble and particle are reflected; In order to strengthen reflecting effect, the awl that this diffusing device of air is point upward is bucket-shaped; The conical surface of diffusing device of air is provided with a plurality of pores, and these a plurality of pores are set to point to oblique upper with different angles separately, so that the material in the cylindrical shell forms turbulent flow;
The multilayer flotation plate that be positioned at cylindrical shell, arranges at interval has a plurality of holes on the flotation plate; The effect of this flotation plate has two: the one, make the different material layering with different buoyancy; The 2nd, the size of the limited aperture bubble by the hole on the flotation plate.The aperture in the hole on the flotation plate is 0.5 centimetre-5 centimetres, and the flotation plate can be metal, various plastics or other material and makes, and it specifically can be the 2-30 layer, for example two-layer, three layers or four layers, wherein bottom flotation plate is positioned at the top of the device of air that looses;
Be positioned at the distributor on top, overflow collection section, distributor is the container that bottom or bottom are provided with many distribution duct, and the end of distribution duct is between diffusing device of air and bottom flotation plate;
Feeder, this feeder is communicated with a plurality of pores on the diffusing device of air by first gas pipeline.
Operation principle of the present invention is: the main component of flyash is carbon granule and ash content.After adding flotation agent and/or collecting agent and/or other auxiliary agent, the particle in the flyash contacts, collides with bubble, and the carbon granule that floatability is good optionally adheres to bubble, and is carried rising, realizes flotation.The ash content of floatability difference is then to sinking.
Workflow of the present invention is: the powdered coal ash in the distributor and many distribution duct of mixture through being positioned at distributor bottom or bottom of flotation agent enter cylindrical shell.Feeder is by the air feed in the cylindrical shell of the pore on the device of air that looses, carbon granule adheres to bubble under the effect of flotation agent, and scatters floating and move upward with turbulent condition, smoothly by the hole on each layer flotation plate, fall on the flotation plate of the superiors, realize the flotation of carbon granule.The carbon granule that floatingly selects is collected in the overflow collection section.The ash content of floatability difference is fallen tail ash collection section then not by the flotation of flotation plate.In addition, diffusing device of air also has the effect of reflection, strengthens turbulent effect by reflection.
The purpose that the bucket-shaped diffusing device of air of awl is set is: the bubble that 1, is combined with carbon granule is bored bucket-shaped diffusing device of air and is reflected to more angle, and its reflecting effect is better than plane reflection; 2, diffusing device of air is jet, and the driving bubble scatters floating in cylindrical shell with turbulent condition, reach better flotation effect; 3, the bubble that does not pass the flotation plate is bored bucket-shaped diffusing device of air reflection, thereby the effect of having aggravated turbulent motion has improved the flotation rate.
Especially, because in the present invention, the gas that upwards blows is turbulent condition, the time of contact of carbon granule and bubble is long, contacts more fully, and the probability that fly ash grain is broken for carbon granule and ash particles increases greatly, thereby make flotation effect better, flotation efficiency is higher.
According to a specific embodiment of the present invention, in order to reach better reflecting effect, this awl bucket angle of boring bucket-shaped diffusing device of air is 60 °-150 ° (awl bucket angle was the angle between the cross section of axle and two intersections of boring the bucket surface).It specifically can select different awl bucket angles according to different materials, adopts 90 ° awl bucket angle as CFB flyash.
According to another embodiment of the present invention, feeder is connected with one or more the second gas pipelines, and this second gas pipeline leads in the distributor or is connected to distribution duct.For example this second gas pipeline can be one, leads in the distributor; Also can be many, be connected respectively to every distribution duct.Like this, can accelerate to enter cylindrical shell by distribution duct by the fly ash grain that gas-powered is positioned at distributor, and then improve the efficient of flotation.Drive the technical scheme that the material in the distributor flows downward with respect to the negative pressure that produces with Venturi tube in the prior art, carry gases at high pressure both can cut down the consumption of energy by gas pipeline, again can be according to what and viscosity adjustments of gas pressure of material, and then improve the product precision.
According to another embodiment of the present invention, FLOTATION SEPARATION equipment also comprises the barrel that is positioned at FLOTATION SEPARATION equipment or the physical separation means on the diffusing device of air.By physical separation means is set, break the combination between carbon granule and the ash content effectively, improved the flotation rate of carbon greatly.This physical separation means specifically can be ultrasonic separation means or ultrasonic broken in bulk putting, and improves peeling off of carbon granule and ash content by the emission ultrasonic wave, for example, forms granularity and reaches the ultra-fine carbon granule of 10,000 purposes.Particularly, this ultrasonic separation means or ultrasonic broken in bulk putting comprise ultrasonic transmitter and supporting servicing unit.
According to another embodiment of the present invention, cylindrical shell comprises the superposed first thinner flotation section and the second thicker flotation section that is positioned at the bottom, the overflow collection section is positioned at the outside of the first flotation section, and the bottom of overflow collection section is lower than the top of the first flotation section, is used for collecting the particle that overflows from the flotation section.For example, the overflow collection section can be hydrostatic column porose on the base plate, and the top of the first flotation section passes from the hole on its base plate, and like this, the particle that floatingly selects in the flotation section is constantly upwards piled up, and flows in the overflow collection section with regard to the barrel of crossing the flotation section; And for example, the top exterior walls of the first flotation section is provided with spout hole or overflow pipe, and the overflow collection section is the container that is positioned at this spout hole or overflow pipe below.Particularly, be provided with the divergent cone section as transitional region between the first flotation section and the described second flotation section, this divergent cone section is positioned at the top of bottom flotation plate, specifically can be between two-layer flotation plate, and for example between bottom flotation plate and the last layer flotation plate that is adjacent.By the divergent cone section is set, make FLOTATION SEPARATION equipment increase reflecting surface, and then the bubble velocity that comes up from the below is slowed down and adjust its direction of motion, the advantage of doing like this is: 1, the turbulent motion effect by reflection aggravation bubble; 2, avoid bubble to make the spillwag chute at top smooth inadequately along cylinder wall to the top of FLOTATION SEPARATION equipment.
According to another embodiment of the present invention, the outlet of tail ash is connected with the tail ash tube road, and this tail ash tube road directly or indirectly leads to distributor, carries out flotation so that the tail ash reenters FLOTATION SEPARATION equipment, thereby improves the flotation rate of flyash.
According to another embodiment of the present invention, FLOTATION SEPARATION equipment also comprises storage device, and bottom or the bottom of this storage device are provided with charging line, and this charging line leads to distributor.The flyash for the treatment of flotation adds chemical agents such as flotation agent in storage device, the charging line of the bottom through being positioned at storage device or bottom enters distributor then.Can be provided with agitating device in the storage device, be used for powdered coal ash slurry and flotation agent are fully stirred.In this embodiment, the tail ash tube road can be connected to storage device.Because when the material that comes out from the tail ash tube road is proceeded flotation, usually need to add chemical agents such as flotation agent, and in distributor, be not easy to add or control bad ratio when adding, returning storage device can address this problem well.In addition, can be provided with tail ash bin (utilizing the tail ash to regulate the interior liquid level of FLOTATION SEPARATION equipment) between the outlet of tail ash and the storage device, the tail ash tube road is connected to the tail ash bin from the outlet of tail ash earlier, leads to storage device from the tail ash bin again.Charging line is provided with the slag stock pump, is used for the product pump in the storage device is delivered in the distributor.
According to another embodiment of the present invention, the height of the end in tail ash tube road is positioned on the top layer flotation plate, and the end in this tail ash tube road is provided with liquid level regulation apparatus, is used for the height of the end in adjusting tail ash tube road, thereby regulates the liquid level in the FLOTATION SEPARATION equipment.
According to another embodiment of the present invention, cylindrical shell is cylinder or square tube.The corner of square tube can form reflection, and the distribution of the particle in the cylinder and bubble is more even.In addition, the top of tail ash collection section can arrange filter in the cylindrical shell, to slow down the downstream rate of material.
Compared with prior art, the present invention has following beneficial effect:
1, the bubble that is combined with carbon granule is bored bucket-shaped diffusing device of air and is reflected to more angle, and its reflecting effect is better than plane reflection;
2, diffusing device of air is jet, and the driving bubble scatters floating in cylindrical shell with turbulent condition, reach better flotation effect;
3, the bubble that does not pass the flotation plate is bored bucket-shaped diffusing device of air reflection, thereby the effect of having aggravated turbulent motion has improved the flotation rate.
The present invention is described in further detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is that embodiments of the invention 1 are along the structural representation of the longitudinal cross-section of its axis;
Fig. 2 is that embodiments of the invention 2 are along the structural representation of the longitudinal cross-section of its axis;
Fig. 3 is that embodiments of the invention 3 are along the structural representation of the longitudinal cross-section of its axis;
Fig. 4 is that embodiments of the invention 4 are along the structural representation of the longitudinal cross-section of its axis.
The specific embodiment
Embodiment 1
As shown in Figure 1, embodiments of the invention 1 comprise: storage device 1, distributor 2, the cylindrical shell 3 that vertically arranges, the bucket-shaped diffusing device of air 4 of awl, multilayer flotation plate 5, feeder 6, physical separation means such as ultrasonic separation means 8, tail ash bin 7, filter 9, overflow collection section 301, tail ash collection section 305.
Vertically the cylindrical shell 3 that arranges can be divided into three parts, is followed successively by from top to bottom: the first flotation section 302, divergent cone section 303, the second flotation section 304.Wherein, the first flotation section 302 is thinner, is provided with one deck flotation plate 5 in it.The second flotation section 304 is thicker, is provided with the bucket-shaped diffusing device of air 4 of awl and one deck flotation plate 5 in it.Divergent cone section 303 is the bucket-shaped transitional region of the awl of point upward between the first flotation section 302 and the second flotation section 304.
Tail ash collection section 305 be that the awl of pointed end is bucket-shaped, and its bottom tip place is provided with tail ash outlet 306, and the tail ash exports 306 and is connected with tail ash tube road 307.Between the second flotation section 304 and tail ash collection section 305, be provided with filter 9.
The device of air 4 that looses is that the awl of point upward is bucket-shaped, and its awl bucket angle is 120 °, and its conical surface is provided with a plurality of pores 401; It is positioned at the second flotation section 304, and is positioned at 305 tops, awl bucket-shaped tail ash collection section.The device of air 4 that looses is provided with a plurality of ultrasonic separation means 8.
Multilayer (for example two-layer) the flotation plate 5 that arranges lays respectively in the first flotation section 302 and the second flotation section 304 at interval, and wherein bottom flotation plate 5 is positioned at the top of the bucket-shaped diffusing device of air 4 of awl.
Be provided with agitating device 101 in the storage device 1, be used for powdered coal ash slurry and flotation agent are fully stirred.Tail ash tube road 307 is connected to tail ash bin 7 from tail ash outlet 306, and tail ash bin 7 is connected to storage device 1 by circulating line 310; The bottom of storage device 1 is provided with charging line 102, and charging line 102 is provided with slag stock pump 103, and this charging line 102 leads to distributor 2.
In addition, also be provided with bypass line on the circulating line 310 as removing ash pipeline 311, be equipped with valve on circulating line 310 and the removing ash pipeline 311.According to fine coal ash composition and technological requirement, the tail ash can reenter by circulating line 310 and carry out flotation in the FLOTATION SEPARATION equipment, to reclaim carbon granule wherein; Carbon content in the tail ash is low excessively, then discharges by removing ash pipeline 311.
Feeder 6 connects first gas pipeline 601 and second gas pipeline 602; Wherein, first gas pipeline 601 is communicated with a plurality of pores 401 of awl on the bucket-shaped diffusing device of air 4, and second gas pipeline 602 leads to distributor 2.
Figure 2 shows that embodiments of the invention 2, the difference of itself and embodiment 1 is: 1, the number of distribution duct 201 is 6; 2, tail ash tube road 307 directly leads to distributor 2, do not have tail ash bin 7 and and storage device 1 between connecting pipe; 3, tail ash tube road 307 is provided with slag stock pump 308; 4, also be provided with bypass line on the tail ash tube road 307 as removing ash pipeline 311, be equipped with valve on tail ash tube road 307 and the removing ash pipeline 311.Equally, according to fine coal ash composition and technological requirement, the tail ash can reenter by tail ash tube road 307 and carry out flotation in the FLOTATION SEPARATION equipment, to reclaim carbon granule wherein; Carbon content in the tail ash is low excessively, then discharges by removing ash pipeline 311.
Figure 3 shows that embodiments of the invention 3, the difference of itself and embodiment 1 is: 1, the flotation plate is 3 layers; 2, the number of distribution duct 201 is 4; 3, tail ash bin 7 is positioned at the end in tail ash tube road 307, and is enclosed within outside the tail ash tube road 307, and the height of tail ash tube road end is positioned on the top layer flotation plate, and the end in tail ash tube road is provided with liquid level regulation apparatus, is used for regulating the height of the end in tail ash tube road; 4, there is not circulating line 310 between tail ash bin 7 and the storage device 1.
Embodiment 4
Figure 4 shows that embodiments of the invention 4, the difference of itself and embodiment 1 is: 1, the flotation plate is 3 layers; 2, the number of distribution duct 201 is 4; 3, tail ash outlet 306 places do not connect any pipeline, and the tail ash in the FLOTATION SEPARATION equipment is directly discharged from tail ash outlet 306.
Though the present invention discloses as above with preferred embodiment, is not in order to limit scope of the invention process.Any those of ordinary skill in the art, in not breaking away from invention scope of the present invention, when doing a little improvement, namely every equal improvement of doing according to the present invention should be invention scope of the present invention and contains.
Claims (10)
1. one kind has the loose flyash FLOTATION SEPARATION equipment of device of air of reflection cone bucket, and the cylindrical shell that it comprises vertical setting is positioned at the overflow collection section at this cylindrical shell top and is positioned at the tail ash collection section of this cylindrical shell bottom; Described overflow collection section is provided with discharging opening, and described tail ash collection section is provided with the outlet of tail ash; This FLOTATION SEPARATION equipment further comprises:
Be positioned at the diffusing device of air of described cylindrical shell, the awl that this diffusing device of air is point upward is bucket-shaped, and its conical surface is provided with a plurality of pores;
The multilayer flotation plate that be positioned at described cylindrical shell, arranges at interval, wherein bottom flotation plate is positioned at the top of described diffusing device of air;
Be positioned at the distributor on top, described overflow collection section, described distributor is the container that the bottom is provided with many distribution duct, and the end of described distribution duct is between described diffusing device of air and described bottom flotation plate;
Feeder, this feeder is communicated with a plurality of pores on the described diffusing device of air by first gas pipeline;
Wherein, described cylindrical shell comprises the superposed first thinner flotation section and the second thicker flotation section that is positioned at the bottom, and described overflow collection section is positioned at the outside of the described first flotation section, and the bottom of described overflow collection section is lower than the top of the described first flotation section.
2. FLOTATION SEPARATION equipment as claimed in claim 1, wherein, described distributor is the container that the bottom is provided with many distribution duct.
3. FLOTATION SEPARATION equipment as claimed in claim 1, wherein, the awl bucket angle of described diffusing device of air is 60 °-150 °.
4. FLOTATION SEPARATION equipment as claimed in claim 1, wherein, described feeder is connected with one or more the second gas pipelines, and described second gas pipeline leads in the described distributor or is connected to described distribution duct.
5. FLOTATION SEPARATION equipment as claimed in claim 1, wherein, described FLOTATION SEPARATION equipment also comprises the barrel that is positioned at described FLOTATION SEPARATION equipment or the physical separation means on the described diffusing device of air.
6. FLOTATION SEPARATION equipment as claimed in claim 1 wherein, is provided with the divergent cone section as transitional region between the described first flotation section and the described second flotation section, and this divergent cone section is positioned at the top of bottom flotation plate.
7. FLOTATION SEPARATION equipment as claimed in claim 1, wherein, the outlet of described tail ash is connected with the tail ash tube road, and described tail ash tube road directly or indirectly leads to described distributor.
8. FLOTATION SEPARATION equipment as claimed in claim 7 wherein, also comprises storage device, and the bottom of described storage device is provided with charging line, and this charging line leads to described distributor.
9. FLOTATION SEPARATION equipment as claimed in claim 8, wherein, the bottom of described storage device is provided with charging line.
10. FLOTATION SEPARATION equipment as claimed in claim 8, wherein, described tail ash tube road is connected to described storage device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110156555 CN102240608B (en) | 2011-06-10 | 2011-06-10 | Coal ash flotation separation equipment provided with reflection cone gas dispersing device |
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| CN 201110156555 CN102240608B (en) | 2011-06-10 | 2011-06-10 | Coal ash flotation separation equipment provided with reflection cone gas dispersing device |
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| CN102240608B true CN102240608B (en) | 2013-08-14 |
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| CN102284377B (en) * | 2011-06-10 | 2013-08-14 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Pulverized fuel ash flotation separation equipment with divergent cone |
| CN102517114B (en) * | 2011-12-20 | 2014-11-12 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Biomass fuel prepared from pig manure |
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| CN102492515A (en) * | 2011-12-20 | 2012-06-13 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Granulated fuel made of excrement of live stocks |
| CN102492514B (en) * | 2011-12-20 | 2014-12-31 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Process for preparing granular biomass fuel by using pig manure and prepared product |
| CN102755934B (en) * | 2012-07-24 | 2014-11-12 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Cell type multi-stage flotation separation equipment for coal ash |
| CN102744154B (en) * | 2012-07-24 | 2014-12-24 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Aeration type coal ash flotation process |
| CN102773170B (en) * | 2012-07-24 | 2015-08-19 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Plug-flow aeration type fuel ash flotation separation equipment |
| CN102728481B (en) * | 2012-07-24 | 2014-07-16 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Aerated coal ash flotation separation equipment |
| CN110237941A (en) * | 2019-06-29 | 2019-09-17 | 浙江精锐机械科技股份有限公司 | A kind of high-pressure jet flotation unit and its processing method |
| CN112604819A (en) * | 2020-11-27 | 2021-04-06 | 郴州天朗金石矿山设备有限公司 | Efficient energy-saving device for recleaning tailings and low-degree ores |
| CN112934484B (en) * | 2021-02-02 | 2023-03-24 | 江苏海洋大学 | Fly ash flotation separation equipment with turbulent flow type air dispersing device |
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| JP昭60－65098A 1985.04.13 |
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