3results about How to "Stable working conditions" patented technology

The utility model provides a laser pumping drive circuit, and relates to the technical field of drive circuits. The output end of a voltage-controlled constant current source unit is connected with a pumping laser; the output end of the dual-mode current setting unit is connected with the reference input end of the voltage-controlled constant current source unit; the output end of the temperature control driving unit is connected with the thermoelectric refrigerating unit, and the feedback input end of the temperature control driving unit is used for receiving a temperature sensing signal; the analog input end of the multi-channel signal acquisition unit is respectively connected with a current sampling point of the voltage-controlled constant current source unit, the output end of the monitoring photodiode and a temperature sensing signal node; the positive power supply output end and the negative power supply output end of the power supply management unit are respectively connected with the power supply ends of the voltage-controlled constant current source unit and the multi-channel signal acquisition unit, and the enabling control end of the power supply management unit is connected with an external interface and is used for receiving a digital enabling signal and guaranteeing the temperature stability and reliability of the laser pumping drive circuit.

This invention discloses a pre-distribution assembly, comprising: an inlet diffuser, which includes: a sleeve consisting of an inner cylinder and an outer cylinder arranged coaxially, with a liquid-holding zone between the inner and outer cylinders, and multiple strip-shaped holes on the upper sidewall of the inner cylinder; an annular bottom plate coaxially connected to the bottom ends of the inner and outer cylinders, the annular bottom plate having multiple through holes and / or multiple slits; a top cover, with a sealing cap located at the upper end of the inner cylinder; a rotating shaft coaxially passing through the inner cylinder, the lower end of the rotating shaft passing through the annular bottom plate; a spiral blade disposed on the rotating shaft and positioned opposite to the strip-shaped holes; a conical splash plate linked to the lower end of the rotating shaft; and a stepped distribution plate coaxially disposed below the inlet diffuser, in a stepped shape with a lower center and higher periphery. This invention also discloses a hydrogenation reactor. The pre-distribution assembly of this invention, through the cooperation of the inlet diffuser and the stepped distribution plate, achieves uniform distribution of gas and liquid phase materials across the entire cross-section of an ultra-large-scale hydrogenation reactor.

This invention discloses an inlet diffuser, comprising: a sleeve consisting of an inner cylinder and an outer cylinder arranged coaxially, the bottom end of the inner cylinder being higher than the bottom end of the outer cylinder, with a liquid-holding zone between the inner and outer cylinders; an annular bottom plate coaxially connected to the bottom end of the outer cylinder, forming a liquid phase channel between the annular bottom plate and the inner cylinder, the area of ​​the liquid phase channel being less than or equal to the area of ​​the liquid-holding zone; a top cover disposed above the inner cylinder, forming a gas phase channel between the top cover and the inner cylinder; a rotating shaft coaxially inserted into the inner cylinder; at least one layer of helical blades disposed within the inner cylinder and driving the rotating shaft to rotate; and at least one layer of splash plates, which have a downward-opening conical structure, and the splash plates are linked to the lower end of the rotating shaft. This invention also discloses a hydrogenation reactor. In the inlet diffuser of this invention, the gas phase enters the inner cylinder, blowing the helical blades and driving the splash plates to rotate, providing an initial horizontal velocity to the liquid phase, and covering the entire reactor cross-section with a spray area.