51results about How to "Realize online regeneration" patented technology

The invention relates to a method for preparing phenol-acetone by using a moving bed reactor, which mainly solves the problem of low selectivity between phenol and acetone in the prior art. The present invention adopts a method for preparing phenol-acetone using a moving bed reactor. The CHP raw material (6) enters the top of the moving bed reactor (1), contacts with a solid catalyst, undergoes a decomposition reaction and releases a large amount of heat, and evaporates the liquid-phase acetone. Be gaseous phase acetone (7) and discharge from moving bed reactor (1) top, the gaseous phase acetone (7) of discharge is condensed into liquid phase acetone in reactor top condenser (2) and return to moving bed reactor (1) Inside, the technical scheme that the reaction product (10) containing phenol and acetone is discharged from the bottom of the moving bed reactor (1) solves the above problems better, and can be used in the preparation of phenol acetone.

The invention discloses an on-line regeneration method of spent TiO2 powder photocatalyst after degradation of natural organic matter, relating to a regeneration method of spent photocatalyst. The invention solves the problems that the existing regeneration method of spent suspending type TiO2 photocatalyst has complicated technique, and photocatalyst needs to be extracted from a photocatalytic reactor. The regeneration method of the invention comprises the steps: 1. after photocatalyst loses effectiveness in the process of using photocatalytic membrane combined technique, stopping feeding raw water, discharging parts of solution in a photocatalytic membrane reactor by using a membrane module; the photocatalyst being TiO2 powder; 2. feeding regeneration liquid into the photocatalytic membrane reactor to remove substance absorbed on the surface of photocatalyst, the regeneration liquid being H2O2 solution, and the concentration of the H2O2 solution being 0.05mM; 3. controlling the intensity of ultraviolet light source 0.1-20mW / cm<2> so as to perform ultra-vioket radiation regeneration. The invention has high regeneration efficiency, does not need to extract photocatalyst from a photocatalytic reactor, can realize on-line regeneration of photocatalyst and has simple operation.

The invention discloses a waste-gas denitration device. The waste-gas denitration device comprises a waste-gas absorption device and a waste-gas removing device. The waste-gas absorption device is a spraying tower or a bubble tower. The waste-gas removing device is an electrochemistry device which is of an integrated structure, and comprises negative poles, positive poles and a reaction channel; the negative poles are negative-pole three-dimensional electrodes, and the negative poles and the positive poles are arranged in scroll shapes; a water inlet channel is formed in one side of the electrochemistry device, a water outlet channel is formed in the other corresponding side of the electrochemistry device, a gas exhausting hole is formed in the upper portion of the electrochemistry device, electric fields are externally added on the negative poles and the positive poles, absorption liquid in the electrochemistry device is regenerated, and meanwhile nitrogen oxide in waste gas is reduced nitrogen. According to the waste-gas denitration device, nitrogen oxide in the waste gas is absorbed and removed through the absorption liquid, the absorption liquid can be efficiently regenerated, and is continuously cycled in a waste-gas denitration system, and the stable and efficient effect on removing NO in the waste gas is achieved; the high temperature, the mild reaction condition and the like are not required, cost is saved, the storage volume of the absorption liquid is reduced, the device space is saved, and zero pollution to the environment is achieved.

The invention relates to a reaction system and method for preparing ethylene through hydrogenation of acetylene. The system comprises a hydrogen and acetylene mixing and pressure equalizing unit, a hydrogenation reaction unit, a cryogenic separation unit, a vacuum filtering unit, a revolving bed regeneration unit and a vacuum low-pressure distillation unit. The method comprises the steps that acetylene and hydrogen are mixed in a pressure equalizing mode through the hydrogen and acetylene mixing and pressure equalizing unit; mixed acetylene and hydrogen are introduced into the hydrogenation reaction unit for a reaction; a gas-phase product generated in the hydrogen and acetylene reaction is subjected to cryogenic separation through the cryogenic separation unit, the product ethylene and excessive hydrogen are obtained, and excessive hydrogen is fed into the hydrogen and acetylene mixing and pressure equalizing unit; slurry in a slurry reactor is led out and separated through the vacuum filtering unit, and a solid phase material and a liquid phase material are obtained; the solid phase material is treated through the revolving bed regeneration unit, and a generation catalyst is obtained; the liquid phase material is treated through the vacuum low-pressure distillation unit for solvent recycling. The reaction system and method for preparing ethylene through hydrogenation of acetylene have the advantages that operation flexibility is high, and the adaptability to the catalyst is high.