30results about How to "Controllable operation" patented technology

The invention relates to a system for synthesizing silicon nitride by a fluidized bed reactor. The system comprises the fluidized bed reactor, a nitrogen supply unit and a silicon powder supply unit, the fluidized bed reactor comprises a shell, a lower cavity of the shell is used for performing nitridation reaction for nitrogen and silicon powder under the fluidization condition, an air supply opening and a material supply opening are formed in the shell wall of the bottom of the shell, the nitrogen supply unit comprises a heating device for heating the nitrogen, an air outlet of the heating device is connected with the air supply opening, the silicon powder supply unit comprises a feeding barrel and a Venturi charging device, the feeding barrel is used for containing the silicon powder, a discharging port of the feeding barrel is connected with a powder inlet of the Venturi charging device, a discharging port of the Venturi charging device is connected with the material supply opening, and a discharging port in the top of the shell is connected with a cyclone separator for recovering synthesized silicon nitride. According to the system, the silicon powder and the nitrogen react under the fluidization condition, the synthesized Si3N4 cannot aggregate and cake, and continuous production of the Si3N4 can be achieved.

The invention provides a livestock and poultry breeding solid-liquid separation excrement cleaning device. The livestock and poultry breeding solid-liquid separation excrement cleaning device comprises an annular excrement collecting box; an excrement scraping plate is installed in the annular excrement collecting box; the excrement scraping plate is directly connected with a power driving mechanism or is connected with the power driving mechanism through a connecting piece; the excrement scraping plate is driven by the power driving mechanism to rotate around the annular excrement collecting box; the bottom plate of the annular excrement collecting box is an inclined plate; the lowest point of the inclined plate is located at the middle of the bottom plate; an urine discharging opening is formed at the middle of the bottom plate; and a solid excrement outlet is formed at the bottom plate of the annular excrement collecting box. According to the livestock and poultry breeding solid-liquid separation excrement cleaning device of the invention, after excrement falls into the annular excrement collecting box, solid-liquid separation of the excrement can be realized; solid excrement and liquid excrement are separately collected through different pipelines; the solid excrement is directly treated and is packaged; and the liquid can be adopted as secondary water after being purified; and therefore, excrement treatment procedures can be decreased, and treatment cost can be decreased, and underground space can be greatly saved. The livestock and poultry breeding solid-liquid separation excrement cleaning device of the invention is reasonable in integral design. The driving mechanism is arranged on the excrement scraping plate. The livestock and poultry breeding solid-liquid separation excrement cleaning device is especially suitable for annular comprehensive cultivation buildings and can realize fast and convenient solid-liquid separation treatment.

The invention discloses a method for rapidly preventing pickling lacking defects. The method comprises the technological step that a pickling inlet injection flow rate and a pickling outlet injection flow rate are adjusted according to calculation results of a formula I and a formula II of the pickling lacking defects which occur in the pickling process. According to the method, by increasing the acid liquor turbulence intensity, the pickling capacity of a pickling unit is rapidly improved, the quality of pickled products can be effectively guaranteed at the same time that pickling technology parameters are not greatly added, and the method is particularly suitable for a shallow channel type hydrochloric acid pickling unit. According to the method, the problem that when the pickling lacking defects occur in a conventional technology, the speed needs to be decreased, and the yield is affected is avoided, and meanwhile the situation that pickling parameters are subjected to manual intervention basically disappear; and the method has the advantages that the technology is simple, operation is easy to control, energy saving is achieved, and the effect is good, and the product quality is effectively improved at the same time of ensuring the production speed.