4results about How to "Reduce cycle load" patented technology

The application discloses a coarse-fine separation mechanism of a grading powder separator and application thereof, and the coarse-fine separation mechanism comprises, from bottom to top, a wind distribution and material distribution area and a pre-scattering and coarse particle grading area which are connected with each other; the wind distribution and material distribution area comprises an air inlet shell, an air inlet, a coarse particle outlet, a flow guide cone and a ring-shaped air ring; the pre-scattering and coarse particle grading area comprises a coarse particle separation shell, a coarse particle separation rotating cage, a material distribution device and a coarse particle separation drive; a material lifting platform is arranged between the coarse particle separation shell and the air inlet shell, and the material lifting platform is located at the outside of the material distribution area outlet and is adjacent to the ring-shaped air ring at the lower side; the coarse particle separation drive is connected with the coarse particle separation rotating cage and the material distribution cone platform through a shaft system, and is used for driving the coarse particle separation rotating cage and the material distribution cone platform to rotate. The application is a kind of mechanism with the functions of scattering, material distribution and coarse-fine particle separation, can be well matched with a traditional dynamic powder separator, complete more clear particle separation, and solve a series of problems caused by the common problems of V selection.

This invention relates to the field of catalysis, and discloses a bilayer gradient acidic core-shell molecular sieve catalyst, its preparation method, and its applications. The bilayer gradient acidic core-shell molecular sieve catalyst comprises a ZSM-11 core layer and a BEA shell layer covering its surface; the acid strength of the ZSM-11 core layer is 0.40–1.20 mmol / g, and its average thickness is 0.5–3 μm; the acid strength of the BEA shell layer is 0.10–0.40 mmol / g, and its average thickness is 20–300 nm. This catalyst possesses a bilayer gradient acidic core-shell structure. When applied to the catalytic synthesis of tert-butylamine from isobutylene or its precursors (alcohols / ethers), it can improve single-pass conversion while maintaining high selectivity, and significantly reduce the carbon deposition rate and bed pressure drop growth, achieving long-term stable operation.

This application discloses an adaptive PLC pneumatic flap control device for material feeding into a mill, comprising upper and lower control troughs installed on a discharge chute, a discharge flap fixed on a rotating shaft, a connecting rod rotating at one end of the rotating shaft, and a transmission rod rotating at the other end of the connecting rod. The upper end of the transmission rod is rotatably connected to the lower end of a cylinder via a connecting assembly, and the cylinder is electrically connected to a PLC control system. In use, based on the actual material feeding situation, the frequency and duration of the cylinder's extension and retraction can be adjusted by the PLC control system to discharge and block material. When the cylinder extends, the transmission rod and connecting rod work together to drive the rotating shaft to rotate, thereby driving the two discharge flaps to rotate, causing their bottoms to approach each other and close, thus blocking the falling material. When the cylinder shortens, the bottoms of the discharge flaps move away from each other, allowing material to be discharged. This ensures that materials meeting the mill feeding standards can be fed into the mill in a timely manner and form a circulation within the roller press circulation system, effectively reducing the circulating load on the dual-drive elevator and roller press.

The invention discloses an energy-saving and efficiency-improving urea production system. The system comprises a synthesis unit, a hydrolysis analysis unit, an evaporation granulation unit and a circulating absorption unit, the method has the advantages that through full-tower operation transformation of the synthetic tower and additional arrangement of the tower plates, idle space in the tower is fully utilized, the material reaction time is prolonged, the urea synthesis conversion rate is remarkably improved, the unreacted material amount is reduced, and the circulating load is reduced, so that the raw material feeding amount can be increased, the capacity of the device is greatly improved, and the problem that the capacity of a traditional process is limited is solved; and sufficient fertilizer guarantee is provided for grain production. The waste heat of 98 DEG C hydrolysis water purification of the hydrolysis system is used for preheating liquid ammonia, energy waste caused by the fact that waste heat is cooled through circulating water in a traditional process is avoided, consumption of extra energy for liquid ammonia preheating is reduced, gradient utilization of heat is achieved, steam consumption and circulating water consumption of the device are remarkably reduced, and the energy-saving effect is outstanding.