JPH0757292B2 - Wire mesh sintered filter material and filter element using the wire mesh sintered filter material - Google Patents
Wire mesh sintered filter material and filter element using the wire mesh sintered filter materialInfo
- Publication number
- JPH0757292B2 JPH0757292B2 JP8617790A JP8617790A JPH0757292B2 JP H0757292 B2 JPH0757292 B2 JP H0757292B2 JP 8617790 A JP8617790 A JP 8617790A JP 8617790 A JP8617790 A JP 8617790A JP H0757292 B2 JPH0757292 B2 JP H0757292B2
- Authority
- JP
- Japan
- Prior art keywords
- wire mesh
- sintered filter
- filter material
- mesh
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000463 material Substances 0.000 title claims description 20
- 230000001681 protective effect Effects 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 239000000706 filtrate Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 description 17
- 239000002184 metal Substances 0.000 description 11
- 239000000843 powder Substances 0.000 description 11
- 239000002245 particle Substances 0.000 description 7
- 239000003758 nuclear fuel Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000011001 backwashing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000002915 spent fuel radioactive waste Substances 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 238000012958 reprocessing Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002927 high level radioactive waste Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 239000002901 radioactive waste Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Filtering Materials (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は濾過器、特に原子力発電所より受け入れた使用
済核燃料再処理工場の清澄工程における濾過器に使用す
る、ミクロン単位の極めて微小な不溶解固形粒子を濾別
するための金網焼結濾材、及びこの金網焼結濾材を使用
したフィルタエレメントに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a filter, particularly, a filter having a very small size of micron unit used for a filter in a refining process of a spent nuclear fuel reprocessing plant received from a nuclear power plant. The present invention relates to a wire mesh sintered filter material for separating dissolved solid particles by filtration, and a filter element using the wire mesh sintered filter material.
［従来の技術］ 原子力発電所等より受け入れた使用済核燃料の再処理工
場における溶液清澄工程においては、使用済核燃料の溶
解溶液（硝酸溶液）中に含まれる粒径５〜10ミクロンの
極めて微小な固形粒子を95％以上除去することが要求さ
れる。[Prior Art] In a solution refining process in a spent nuclear fuel reprocessing plant received from a nuclear power plant, etc., an extremely small particle size of 5 to 10 microns contained in a dissolved solution (nitric acid solution) of spent nuclear fuel It is required to remove solid particles by 95% or more.
従来、このような条件を満足する濾過器としては、ステ
ンレス金属粉末を焼結した金属粉末焼結フィルタエレメ
ントを使用したパルスフィルタが用いられる。Conventionally, as a filter that satisfies such conditions, a pulse filter using a metal powder sintered filter element obtained by sintering stainless metal powder is used.
［発明が解決しようとする課題］ しかし、上記のようなミクロン単位の極めて微小な固体
粒子を濾別するための金属粉末焼結濾材は、その補集効
率は極めて優れているが、濾材の層が厚く、形成された
濾過孔の形状は複雑で、かつ、液の通路が屈折している
ため濾過抵抗が大きく、微粒子の目詰まりによる濾過速
度の低下も大きい。また目詰まりが激しく、更に洗浄
（逆洗）による目詰まりの回数も充分な効果を得ること
が困難である。従つてこのような従来の濾材を使用した
フィルタエレメントは交換頻度がきわめて多いという欠
点がある。[Problems to be Solved by the Invention] However, although the metal powder sintered filter medium for filtering out the extremely fine solid particles of the micron unit as described above has an extremely high collection efficiency, it is a layer of the filter medium. Is thick, the shape of the formed filtration hole is complicated, and the flow path of the liquid is refracted, the filtration resistance is large, and the filtration speed is greatly reduced due to the clogging of fine particles. Further, it is severely clogged, and it is difficult to obtain a sufficient effect of the number of times of clogging due to washing (backwashing). Therefore, a filter element using such a conventional filter medium has a drawback that the replacement frequency is extremely high.
しかるに、核燃料等の放射性物質を取り扱う場合、汚染
が外部に拡大することを防止するためにはフィルタの交
換に際し、事前にフィルタの洗浄を行い、更に交換時液
の滴下により輸送キャスクや作業エリヤが汚染しないよ
う充分な液切りと自然乾燥を行う必要があり、従つて稼
働率の低下を招いている。However, when handling radioactive materials such as nuclear fuel, in order to prevent the contamination from spreading to the outside, the filter should be washed in advance when it is replaced, and the transportation cask and work area should be removed by dropping the liquid at the time of replacement. It is necessary to perform sufficient drainage and natural drying so as not to contaminate, and therefore the operating rate is reduced.
また、交換頻度が多いことから高レベルの放射性廃棄物
としてのフィルタエレメントが多くなることも問題とな
つている。Another problem is that the number of filter elements as high-level radioactive waste increases due to frequent replacement.
本発明は従来の技術の有するこのような問題点に鑑みな
されたものであり、その目的とするところは、濾過抵抗
が小さく、かつ目詰まりの度合いが少なく、更に目詰ま
り時においても洗浄により容易に目詰まりが除去でき
る、ミクロン単位の極めて微小な固形粒子を濾別できる
金網焼結濾材、及びこの金網焼結濾材を使用したフィル
タエレメントを提供しようとするものである。The present invention has been made in view of such problems of the prior art, and the object thereof is to have a low filtration resistance and a low degree of clogging, and further to facilitate cleaning by washing even when clogging. An object of the present invention is to provide a wire mesh sintered filter medium capable of removing very small solid particles in micron units capable of removing clogging, and a filter element using the wire mesh sintered filter medium.
［課題を解決するための手段］ 上記目的を達成するために、本発明における金網焼結濾
材は縦、または横方向の一方の目開きが極めて微細な綾
畳織金網２枚を、それぞれの縦線、及び横線が互いに交
差角が90度になるよう重ね合わせた後加圧、焼結し一体
化するものである。[Means for Solving the Problems] In order to achieve the above object, the wire mesh sintered filter medium of the present invention comprises two twill-woven wire meshes having extremely fine openings in one of the longitudinal and transverse directions, and The line and the horizontal line are superposed so that their crossing angle is 90 degrees, and then pressed and sintered to be integrated.
更に、本発明フィルタエレメントは、濾液接触面より保
護金網、本発明金網焼結濾材、保護金網、補強金網を順
次配設することにより構成される。Further, the filter element of the present invention is constructed by sequentially disposing a protective wire mesh, a wire mesh sintered filter material of the present invention, a protective wire mesh, and a reinforcing wire mesh from the contact surface of the filtrate.
以下、本発明を実施例につき図面に基づいて詳細に説明
する。Hereinafter, the present invention will be described in detail based on embodiments with reference to the drawings.
本実施例においては基本金網として、縦325メッシュ
（線径0.035mm）、横2400メッシュ（線径0.025mm）のス
テンレス鋼線製の綾畳織金網を使用し、この基本金網２
枚をそれぞれの縦線、及び横線が互いに交差角が90度に
なるように重ね合わせた後、加圧、焼結すれば、縦線、
及び横新は互いに接触したその交差点において結合され
る。本発明の金網焼結濾材は以上のように構成される。In this embodiment, as the basic wire mesh, a twill-woven wire mesh made of stainless steel wire having a length of 325 mesh (wire diameter 0.035 mm) and a width of 2400 mesh (wire diameter 0.025 mm) is used.
Vertical lines and horizontal lines are overlapped with each other so that the crossing angle is 90 degrees, and then pressure and sintering are performed to obtain vertical lines.
And transverses are joined at their intersection where they touch each other. The wire mesh sintered filter medium of the present invention is configured as described above.
なお、本実施例においては基本金網として縦325メッシ
ュ、横2400メッシュの綾畳織金網を使用したが、場合に
より更に目数の少ない縦270メッシュ、横2000メッシ
ュ、あるいは目数の多い縦500メッシュ、横3600メッシ
ュの綾畳織金網も使用できる。メッシュがあまり小さい
と粒子の捕集効率が低下し、メッシュがあまり大きいと
金網の製作が困難で、かつ強度に問題があり、本発明の
金網焼結濾材を構成する基本金網としては縦270〜500メ
ッシュ、横2000〜3600メッシュの綾畳織金網を使用する
と好適である。In the present embodiment, a twill-woven wire mesh of 325 mesh in the vertical direction and 2400 mesh in the horizontal direction was used as the basic wire mesh, but in some cases, the number of meshes is 270 mesh in the vertical direction, 2000 mesh in the horizontal direction, or 500 mesh in the vertical direction with a large number of meshes. , 3600 mesh horizontal twill wire mesh can also be used. If the mesh is too small, the collection efficiency of particles is reduced, and if the mesh is too large, it is difficult to manufacture a wire mesh, and there is a problem in strength.As a basic wire mesh that constitutes the wire mesh sintered filter material of the present invention, a length of 270- It is preferable to use a twill-woven wire mesh of 500 mesh and width of 2000 to 3600 mesh.
第１図は本発明の金網焼結濾材を使用したフィルタエレ
メントの構成を説明するためのその要部斜視断面図で、
濾液接触面より保護金網（１）、本発明の金網焼結濾材
（２）、保護金網（３）、補強金網（４）、補強金網
（５）が順次配設され本発明のフィルタエレメントが構
成される。FIG. 1 is a perspective sectional view of an essential part for explaining the configuration of a filter element using the wire mesh sintered filter material of the present invention,
A protective wire mesh (1), a wire mesh sintered filter material (2) of the present invention, a protective wire mesh (3), a reinforcing wire mesh (4), and a reinforcing wire mesh (5) are sequentially arranged from the filtrate contact surface to constitute the filter element of the present invention. To be done.
保護金網（１）、（３）は、いずれもは金網焼結濾材
（２）を保護するもので、100メッシュ（線径0.1mm）の
ステンレス鋼線製の平織の金網で、金網焼結濾材（２）
をはさみその両側面に加圧、焼結される。なお、保護金
網（３）は金網焼結濾材（２）を保護するのみならず、
補強金網（４）、（５）への分流効果を向上せしめる効
果がある。The protective wire meshes (1) and (3) both protect the wire mesh sintered filter medium (2), and are 100-mesh (wire diameter 0.1 mm) stainless steel wire plain weave wire mesh. (2)
Scissors are pressed and sintered on both sides. The protective wire mesh (3) not only protects the wire mesh sintered filter medium (2),
It has the effect of improving the effect of diversion to the reinforcing wire nets (4) and (5).
補強金網（４）、（５）はいずれも濾材（２）面にかか
る濾過圧力に対抗して濾材を補強するもので、補強金網
（４）、（５）はいずれも縦12メッシュ（線径0.6m
m）、横64メッシュ（線径0.4mm）のステンレス鋼線製の
平畳織金網で、それぞれの縦線、及び横線の交差角が90
度になるよう重ねあわせ保護金網（３）の内側面に加
圧、焼結しそれぞれの接触部を溶着せしめる。The reinforcing wire meshes (4) and (5) both reinforce the filter material against the filtration pressure applied to the surface of the filter material (2). The reinforcing wire meshes (4) and (5) both have a vertical 12 mesh (wire diameter). 0.6 m
m), horizontal mesh of 64 mesh (diameter 0.4 mm) made of stainless steel wire, and the crossing angle of each vertical line and horizontal line is 90
The inner surface of the protective wire mesh (3) is pressed and sintered so that the contact portions are welded.
次ぎに、上記実施例に示す本発明の金網焼結濾材フィル
タエレメントを使用したパルスフィルタの微粒子捕集効
率と濾過速度の変化を測定し、従来の金属粉末焼結フィ
ルタエレメントを使用したパルスフィルタと対比した。Next, the change in the particulate collection efficiency and filtration rate of the pulse filter using the wire mesh sintered filter material filter element of the present invention shown in the above examples was measured, and the pulse filter using the conventional metal powder sintered filter element was used. Contrasted.
表−１に微粒子捕集効率の測定結果を示す。Table 1 shows the measurement results of the particulate collection efficiency.
第２図は本発明の金網焼結濾材フィルタエレメントを使
用したパルスフィルタと従来の金属粉末焼結濾材フィル
タエレメントを使用したパルスフィルタとの濾過速度を
比較する曲線で、測定条件は下記の通りである。 FIG. 2 is a curve comparing the filtration speeds of the pulse filter using the wire mesh sintered filter medium filter element of the present invention and the pulse filter using the conventional metal powder sintered filter medium filter element. The measurement conditions are as follows. is there.
運転条件 真空度；−0.9mAq 逆洗圧;0.9Kg/cm2 逆洗時間;5.0sec 濾過面積;1,350cm2 給液条件 残渣濃度;0.6g/L 残渣粒径;5〜10μｍ 液温；常温（約25℃） ［効果］ 以上述べたごとく、本発明の金網焼結濾材フィルタエレ
メントを使用したパルスフィルタの微粒子捕集効率は、
従来の金属粉末焼結濾材フィルタエレメントを使用した
パルスフィルタと比較し遜色なく極めて優秀であるのみ
ならず、本発明の金網焼結濾材フィルタエレメントを使
用したパルスフィルタは従来の金属粉末焼結濾材フィル
タエレメントを使用したパルスフィルタと比較し、微粒
子の濾過速度とその経時変化（低下割合）は極めて優れ
ている。Operating condition the vacuum degree; -0.9MAq Gyakuarai圧; 0.9 Kg / cm 2 backwashing time; 5.0 seconds filtration area; 1,350Cm 2 supply fluid condition remaining渣濃degree; 0.6 g / L residual渣粒diameter; 5 to 10 [mu] m liquid temperature; room temperature (Approximately 25 ° C.) [Effect] As described above, the particulate collection efficiency of the pulse filter using the wire mesh sintered filter medium filter element of the present invention is
The pulse filter using the wire mesh sintered filter medium filter element of the present invention is not only excellent as compared with the pulse filter using the conventional metal powder sintered filter medium filter element, but also the conventional metal powder sintered filter medium filter. Compared with a pulse filter using an element, the filtration rate of fine particles and its change with time (reduction rate) are extremely excellent.
また、本発明の金網焼結濾材は２枚の金網を焼結したも
のであるから従来の金属粉末焼結濾材に比較し、濾過抵
抗が小さく、かつ目詰まりも少ない。更に本発明の金網
焼結濾材は主として表面濾過により微粒子を捕集するも
ので、目詰まり時においても洗浄（逆洗）による目詰ま
りの回復も容易である。従つて逆洗性能は極めて良好
で、従来の金属粉末焼結濾材フィルタエレメントを使用
したものと比較するとその処理液量（寿命）は約15倍で
ある。In addition, since the wire mesh sintered filter material of the present invention is obtained by sintering two wire meshes, it has lower filtration resistance and less clogging than the conventional metal powder sintered filter material. Furthermore, the wire mesh sintered filter material of the present invention mainly collects fine particles by surface filtration, and therefore even when clogging, recovery of clogging by washing (backwashing) is easy. Therefore, the backwashing performance is extremely good, and the treatment liquid volume (life) is about 15 times that of the conventional metal powder sintered filter medium filter element.
従つて、特に原子力発電所等の使用済核燃料の再処理工
場の清澄工程における溶液中のミクロン単位の微小な不
溶解固形粒子を濾別するパルスフィルタに使用すれば、
エレメント取替え時の停止期間が少なくなるので稼働率
が向上し、また交換頻度が少ないことから放射性廃棄物
の発生量を著しく削減することができる。Therefore, in particular, if it is used for a pulse filter for filtering microscopic insoluble solid particles in a solution in a refining process of a spent nuclear fuel reprocessing plant such as a nuclear power plant,
Since the downtime during element replacement is reduced, the operating rate is improved, and because the frequency of replacement is low, the amount of radioactive waste generated can be significantly reduced.
第１図は本発明の金網焼結濾材を使用したフィルタエレ
メントの構成を説明する要部斜視断面図、第２図は本発
明の金網焼結濾材フィルタエレメントの使用したパルス
フィルタと従来の金属粉末焼結濾材フィルタエレメント
を使用したパルスフィルタとの濾過速度を比較する曲線
である。 １、３……保護金網、２……金網焼結濾材 ４、５……補強金網 Ａ……本発明の金網焼結濾材フィルタエレメントを使用
したパルスフィルタの濾過速度曲線 Ｂ……従来の金属粉末焼結濾材フィルタエレメントを使
用したパルスフィルタの濾過速度曲線FIG. 1 is a perspective sectional view of an essential part for explaining the construction of a filter element using the wire mesh sintered filter material of the present invention, and FIG. 2 is a pulse filter used in the wire mesh sintered filter material filter element of the present invention and a conventional metal powder. It is a curve which compares the filtration rate with the pulse filter which uses a sintered filter medium filter element. 1, 3 ... Protective wire mesh, 2 ... Wire mesh sintered filter medium 4, 5 ... Reinforcing wire mesh A ... Filtration speed curve of pulse filter using the wire mesh sintered filter medium filter element of the present invention B ... Conventional metal powder Filtration rate curve of pulse filter using sintered filter media filter element
───────────────────────────────────────────────────── フロントページの続き (72)発明者 村上 善朗 茨城県那珂郡東海村大字村松４番地33 動 力炉・核燃料開発事業団東海事業所内 (72)発明者 高橋 修 茨城県那珂郡東海村大字村松４番地33 動 力炉・核燃料開発事業団東海事務所内 (72)発明者 野沢 義宏 兵庫県尼崎市杭瀬寺島２丁目１番２号 木 村化工機株式会社内 (72)発明者 桝田 達則 兵庫県尼崎市杭瀬寺島２丁目１番２号 木 村化工機株式会社内 (56)参考文献 特開 昭56−7624（ＪＰ，Ａ) 実開 昭53−144913（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiro Murakami 4-3 Muramatsu, Tokai-mura, Naka-gun, Ibaraki Prefecture Inside the Tokai Works, Reactor and Nuclear Fuel Development Corporation (72) Osamu Takahashi Tokai-mura, Naka-gun, Ibaraki Prefecture Muramatsu No. 33 33 Tokai Office, Reactor and Nuclear Fuel Development Corporation (72) Inventor Yoshihiro Nozawa, 2-1, 2 Haseseterajima, Amasezaki City, Hyogo Prefecture Kimura Kakoki Co., Ltd. (72) Inventor Tatsunori Masuda Amagasaki, Hyogo Prefecture 2-1-2, Kiseru-jijima, Ichi-shi, Ichi, Kimura Kakoki Co., Ltd. (56) References JP-A-56-7624 (JP, A) Actually-made Shou 53-144913 (JP, U)
Claims (3)
微細な綾畳織金網２枚を、それぞれの縦線、及び横線が
互いに交差角が90度となるよう重ね合わせた後加圧、焼
結し一体化せしめたことを特徴する金網焼結濾材。1. A twill-woven woven wire mesh having extremely fine openings in one of the longitudinal direction and the transverse direction is superposed on each other so that the vertical lines and the horizontal lines have a crossing angle of 90 degrees with each other and then pressed. , A wire mesh sintered filter medium characterized by being sintered and integrated.
00〜3600メッシュの綾畳織金網である請求項１記載の金
網焼結濾材。2. A twill tatami wire mesh has a length of 270 to 500 mesh and a width of 20.
The wire mesh sintered filter material according to claim 1, which is a twill-woven wire mesh of 00 to 3600 mesh.
材、保護金網、補強金網を順次配設してなるフィルタエ
レメントにおいて、前記金網焼結濾材を請求項１又は２
記載の金網焼結濾材で構成したことを特徴とするフィル
タエレメント。3. A filter element comprising a protective wire mesh, a wire mesh sintered filter material, a protective wire mesh and a reinforcing wire mesh, which are sequentially arranged from the filtrate contact surface, wherein the wire mesh sintered filter material is used.
A filter element comprising the wire mesh sintered filter material described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8617790A JPH0757292B2 (en) | 1990-03-30 | 1990-03-30 | Wire mesh sintered filter material and filter element using the wire mesh sintered filter material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8617790A JPH0757292B2 (en) | 1990-03-30 | 1990-03-30 | Wire mesh sintered filter material and filter element using the wire mesh sintered filter material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03284311A JPH03284311A (en) | 1991-12-16 |
| JPH0757292B2 true JPH0757292B2 (en) | 1995-06-21 |
Family
ID=13879480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8617790A Expired - Fee Related JPH0757292B2 (en) | 1990-03-30 | 1990-03-30 | Wire mesh sintered filter material and filter element using the wire mesh sintered filter material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0757292B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017026101A (en) * | 2015-07-27 | 2017-02-02 | 日本ドレッサー株式会社 | Valve device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2781807B2 (en) * | 1992-06-11 | 1998-07-30 | 日本化薬株式会社 | Gas filter for gas generator |
| JP2010075832A (en) * | 2008-09-25 | 2010-04-08 | Nichidai Filter Corp | Filter for high speed filtration |
| JP6084071B2 (en) * | 2013-02-28 | 2017-02-22 | Ｊｆｅエンジニアリング株式会社 | Seawater filtration device for ballast water |
| JP6702544B2 (en) * | 2016-06-16 | 2020-06-03 | 株式会社東芝 | Sulfate ion reduction method, sulfate ion reduction device, and sulfate ion reactant |
-
1990
- 1990-03-30 JP JP8617790A patent/JPH0757292B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017026101A (en) * | 2015-07-27 | 2017-02-02 | 日本ドレッサー株式会社 | Valve device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03284311A (en) | 1991-12-16 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |