摘要:
A bearing, having an inner ring, an outer ring, rolling members, inner seal members, outer seal members, a first grease having good heat resistance which is contained inward of the inner seal member, and a second grease having water-resistance and corrosion-prevention which is contained between the inner seal member and the outer seal member. The second grease prevents rusting in the outer and inner rings even if water enters the inner side of the outer seal member. The first grease assures satisfactory lubrication of the rolling members, the outer and inner rings under high speed and high temperature conditions.
摘要:
A cathode is arranged at one end of an envelope of a fluorescent lamp, and a plurality of anodes are arranged at the other end. A discharge path-forming structure is disposed between the cathode and anodes. The structure comprises a vessel having an open end at the position adjacent to the anodes and an inner space, and also comprises a dividing element for dividing the inner space into a plurality of divided discharge paths each including a corresponding anode. A fluorescent material layer is coated on the inner surface of the vessel in a manner whereby the lamp generates different color light beams.
摘要:
It is intended to effectively suppress corrosion of a feed-water supply pipe in a preheater, by means of recirculation of boiler water to feed-water to be supplied to a steam boiler, even if a concentration of an alkaline component of the feed-water is relatively high. An alkali metal hydroxide is added from an agent-adding unit (14) to feed-water after removing therefrom a water hardness component in a water-softener unit (15) using a cation exchange resin and then removing therefrom dissolved gas in a degasifier unit (16). Then, the feed-water is supplied to a steam boiler 20 via a feed-water supply line 13 while being heated by a preheater (41). A part of boiler water having a pH value increased along with an increase in concentration of the alkali metal hydroxide resulting from enrichment thereof in the steam boiler (20) is mixed with the feed-water via a recirculation line (38). An alkaline component of the feed-water in the feed-water supply line (13) reacts with hydrogen ions from the cation exchange resin to form a carbonic acid, so that a concentration of the alkaline component is reduced. Thus, when the boiler water is mixed with the feed-water, a pH of the feed-water is increased without being influenced by a buffering ability of the alkaline component, to suppress corrosion of the feed-water supply line (13).
摘要:
A hardness indicator composition, and a method of water hardness analysis, capable of measuring hardness even with higher-hardness water without requiring titration by a two-liquid system. The hardness indicator composition is formulated of a metal indicator with a desensitizer added thereto.
摘要:
Computers PC of n stations, each equipped with a storage device to accommodate the data to be cross-correlated, are connected to a line concentrator or communications network that has a switching function. The data allocated to each computer can be divided into n or more partial data, and each partial data is assigned to perform the cross correlation operation to each computer. Furthermore, in PC's connected in such a manner that data can be transmitted via a line concentrator or communication network, mutually between 2 PC's connected each other, the step of transmiting partial data from the PC to the partner PC connected to the PC is repeated. Thereby, it is possible to effectively distribute data as an object of the cross correlation operation stored in multiple storage devices of PC's to each PC.
摘要:
The invention effectively prevents occurrence of corrosion in water tubes or the like of boilers. The invention provides a method for operating a boiler, including regulating a concentration of sulfate ions SO42− in boiler water to under 500 ppm, and a method for injecting a sulfite base oxygen scavenger, including setting a concentration of residual dissolved oxygen in boiler feed water to 2-4 ppm. The invention further provides a sulfite base oxygen scavenger composition comprising: 3-30 weight % of at least one selected from a group consisting of Na2SO3, K2SO3, NaHSO3 and KHSO3; 1-20 weight % of NaOH or KOH; 0.2-2 weight % of potassium sorbate; and 5-500 ppm of CoSO4.
摘要翻译:本发明有效地防止了锅炉水管等中的腐蚀发生。 本发明提供了一种操作锅炉的方法,包括将锅炉水中硫酸根离子SO42-的浓度调节到500ppm以下,以及一种注入亚硫酸盐氧清除剂的方法,包括在锅炉给水中设定残留的溶解氧浓度 至2-4ppm。 本发明还提供了一种亚硫酸盐氧清除剂组合物,其包含:3-30重量%的选自Na 2 SO 3,K 2 SO 3,NaHSO 3和KHSO 3中的至少一种; 1-20重量%的NaOH或KOH; 0.2-2重量%的山梨酸钾; 和5-500ppm的CoSO 4。
摘要:
According to the present invention, there is provided a process for inhibiting the polymerization of an aromatic vinyl compound which is capable of efficiently inhibiting the polymerization of an aromatic vinyl compound not only in an initial stage but also over a long term in the stage of producing, purifying, storing or transporting the aromatic vinyl compound, and which is excellent in handling. The present invention relates to a process for inhibiting the polymerization of an aromatic vinyl compound which requires the step of adding a 2-nitrophenol compound in combination with a sulfonic acid compound to the aromatic vinyl monomer during the stage of producing, purifying, storing or transporting the aromatic vinyl compound.
摘要:
Alkaline earth metal basic silicate particles having a silicate of an alkaline earth metal on the surfaces of the alkaline earth metal hydroxide particles, and having an SiO2/MO (M is an alkaline earth metal) molar ratio as a whole in a range of from 0.01 to 0.90. The particles are useful as a stabilizer for the chlorine-containing polymers.
摘要:
The invention effectively prevents occurrence of corrosion in water tubes or the like of boilers. The invention provides a method for operating a boiler, including regulating a concentration of sulfate ions SO.sub.4.sup.2- in boiler water to under 500 ppm, and a method for injecting a sulfite base oxygen scavenger, including setting a concentration of residual dissolved oxygen in boiler feed water to 2-4 ppm. The invention further provides a sulfite base oxygen scavenger composition comprising: 3-30 weight % of at least one selected from a group consisting of Na.sub.2 SO.sub.3, K.sub.2 SO.sub.3, NaHSO.sub.3 and KHSO.sub.3 ; 1-20 weight % of NaOH or KOH; 0.2-2 weight % of potassium sorbate; and 5-500 ppm of CoSO.sub.4.
摘要翻译:本发明有效地防止了锅炉水管等中的腐蚀发生。 本发明提供了一种操作锅炉的方法,包括将锅炉水中硫酸根离子SO42-的浓度调节到500ppm以下,以及一种注入亚硫酸盐氧清除剂的方法,包括在锅炉给水中设定残留的溶解氧浓度 至2-4ppm。 本发明还提供了一种亚硫酸盐氧清除剂组合物,其包含:3-30重量%的选自Na 2 SO 3,K 2 SO 3,NaHSO 3和KHSO 3中的至少一种; 1-20重量%的NaOH或KOH; 0.2-2重量%的山梨酸钾; 和5-500ppm的CoSO 4。