95results about How to "Simple conditions of use" patented technology

The invention relates to a displacement detecting device. A displacement detecting device (1) includes a light source (2), a beam splitting section (3), a diffraction grating (4), a reflecting section (6), a beam combining section (3), a light receiving section (8), and a relative position information output section (10). The diffraction grating (4) is adapted to diffract a first beam (L1) reflected by a surface-to-be-measured of a member-to-be-measured (9), and cause the diffracted first beam (L1) to be incident again on the surface-to-be-measured. The reflecting section (6) is adapted to reflect a second beam (L2) split by the beam splitting section to the beam splitting section (3). The light receiving section (8) is adapted to receive interfering light of the first beam (L1) and the second beam (L2). The relative position information output section (10) is adapted to output displacement information of the surface-to-be-measured in the height direction based on intensity of the received interfering light.

The invention provides a boiler oxygen scavenger and a preparation method of the boiler oxygen scavenger. The boiler oxygen scavenger comprises an organic reducing agent, a dispersing agent, a passivating agent, a pH adjusting agent and water, where the mass ratio of the organic reducing agent to the dispersing agent to the passivating agent to the pH adjusting agent to water is (10-40): (1-10): (5-20): (5-10): (20-40). The invention also provides a preparation method of the boiler oxygen scavenger. The method comprises the steps of sequentially adding the organic reducing agent, the dispersing agent, the passivating agent, the pH adjusting agent and water in parts by mass in a reactor in which a stirrer is arranged, stirring and dissolving to obtain the product disclosed by the invention, the boiler oxygen scavenger disclosed by the invention is non-toxic and harmless liquid chemical agent and can be used in the condition that boiler return water is used as drinking water or comes into contact with food. The boiler oxygen scavenger disclosed by the invention has an excellent effect of removing dissolved oxygen out of the boiler feed water and also can greatly reduce the contents of copper and iron in the feed water system; and therefore the boiler oxygen scavenger can be widely used in the fields of high-pressure and medium-pressure boiler water treatment.

The present invention provides a kind of formaldehyde gas oxidizing catalyst for room temperature use. Metal oxide is first obtained with soluble metal nitrate, carbonate or other inorganic salt and through oxidation and precipitation; and then loaded with small amount of metal to form the catalyst with room temperature formaldehyde oxidizing activity. The catalyst has metal oxide as main body and supported noble metal as active component, and features that the metal oxide may be oxide of Al, Ni, Mn, Si or Fe, and the noble may be Pt, Ru, Au, Rh or Pd. The catalyst of the present invention has high catalytic activity, and long sustaining time. The catalyst has formaldehyde converting rate up to 100 %, and results in low power consumption.