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    • 6. 发明授权
    • Process for desulfurizing combustion exhaust gases
    • 燃烧废气脱硫工艺
    • US4328195A
    • 1982-05-04
    • US130388
    • 1980-03-14
    • Toshikatsu MoriTeruo KumagaiShinpei MatsudaTsukasa NishimuraYasuyuki Nishimura
    • Toshikatsu MoriTeruo KumagaiShinpei MatsudaTsukasa NishimuraYasuyuki Nishimura
    • B01D53/50B01D53/68B01D53/77C01F11/46C01B17/00
    • C01F11/464B01D53/501B01D53/68
    • An improved process for desulfurizing combustion exhaust gases of mainly coal containing sulfur oxides, HF and dust containing Al is provided, which process consists of four steps; a first step of contacting the gases with calcium carbonate or hydroxide in the form of slurry to convert the sulfur oxides into CaSO.sub.3 ; a second step of contacting O.sub.2 with the resulting slurry to convert CaSO.sub.3 into CaSO.sub.4 ; a third step of separating CaSO.sub.4 and mother liquor from the resulting slurry; and a fourth step of preparing a slurry of calcium carbonate or hydroxide to be employed in the first step, from the mother liquor, the pHs of the slurry and the mother liquor in the first and fourth steps being adjusted to 5 or higher by adding alkali such as sodium carbonate.According to the present process, it is possible to prevent hindrance of HF and Al contained in dust to the reaction of SO.sub.2 -absorbent (CaCO.sub.3 or Ca[OH].sub.2) with SO.sub.2 gas, and thereby improve percentage desulfurization and also obtain a high quality gypsum.
    • 提供了一种改进的主要含硫硫氧化物,HF和含有Al的粉尘的燃烧废气脱硫方法,该方法由四个步骤组成: 将气体与浆料形式的碳酸钙或氢氧化物接触以将硫氧化物转化为CaSO 3的第一步骤; 使O 2与所得浆料接触以将CaSO 3转化为CaSO 4的第二步骤; 从所得浆料中分离出CaSO 4和母液的第三步骤; 以及在母液中制备第一步中使用的碳酸钙或氢氧化物浆料的第四步骤,通过加入碱将第一步骤和第四步骤中的浆料和母液的pH调节至5以上 如碳酸钠。 根据本方法,可以防止SO 2吸收剂(CaCO 3或Ca [OH] 2)与SO 2气体反应中灰尘中含有的HF和Al的阻碍,从而提高脱硫率并获得高质量 石膏
    • 7. 发明授权
    • Safety device for a kneading machine using rolls
    • 用于使用辊的捏合机的安全装置
    • US5921367A
    • 1999-07-13
    • US805731
    • 1997-02-25
    • Tohru KashiokaYasuyuki NishimuraShogo TannoKatsuya Okamoto
    • Tohru KashiokaYasuyuki NishimuraShogo TannoKatsuya Okamoto
    • F16P3/14G08B29/00
    • F16P3/14F16P3/144F16P3/147F16P3/148
    • A safety device detects when a worker's hand enters a hazardous region between rollers of a kneading machine, and stops rotation of the rolls to prevent an accident. Each time the rollers are stopped, the orientation of photoelectric sensors is switched from the vicinity of the gap between the two rollers to a test reflection member, and the quantity of received light is compared to a predetermined value, to prevent workers form starting work without knowing a fault or accident has happened. More specifically, a bar electrode of an electrostatic capacitance sensor is disposed above and near the gap between the two rollers, for detecting a physical quantity that is changed by entry of a worker's hand. When the electrostatic capacitance detected by the sensor exceeds a predetermined value, a judging circuit supplies a control signal to stop a driving unit that operates the kneading machine. Heat ray sensors or photoelectric sensors may be used as alternatives to electrostatic sensors. As an additional feature, case housing light projectors and photoelectric sensors are rotatably disposed above and near the gap between the two rollers, and a test reflector is disposed on the side of the case. When the rollers are stopped, a light receiving object switching circuit rotates the case and a test circuit tests the light receiving states of the photoelectric sensors.
    • 安全装置检测工人的手进入捏合机的辊之间的危险区域,并停止辊的旋转以防止事故。 每次停止辊子时,光电传感器的方向从两辊之间的间隙附近切换到测试反射部件,并将接收到的光量与预定值进行比较,以防止工作人员在没有 知道故障或事故已经发生。 更具体地,静电电容传感器的棒状电极设置在两个辊之间的间隙的上方和附近,用于检测通过工人手的进入而改变的物理量。 当由传感器检测到的静电电容超过预定值时,判断电路提供控制信号以停止操作捏合机的驱动单元。 热射线传感器或光电传感器可用作静电传感器的替代品。 作为附加特征,壳体投光器和光电传感器可旋转地设置在两个辊之间的间隙上方和附近,并且测试反射器设置在壳体的侧面上。 当辊停止时,受光对象切换电路使壳体旋转,并且测试电路测试光电传感器的光接收状态。