3results about How to "Increase opportunities" patented technology

This utility model relates to the field of quartz sand processing technology, specifically to a quartz sand drying system. It includes a frame and a horizontal drum rotatably mounted on the frame. Several support rollers for supporting the horizontal drum are installed on the frame. A biomass hot air device is also included. Fixed covers are fitted onto the outer sides of both ends of the horizontal drum. A heat-conducting cylinder is coaxially installed inside the horizontal drum, with both ends mounted on the frame and extending through the two fixed covers. A drying space is formed between the heat-conducting cylinder and the horizontal drum. The air outlet of the biomass hot air device is connected to one end of the heat-conducting cylinder, and the other end of the heat-conducting cylinder is connected to an exhaust gas treatment device. A feed inlet is connected to the fixed cover near the air outlet of the biomass hot air device, and an outlet is provided on the fixed cover at the other end. Both the feed inlet and outlet are connected to the drying space, which is connected to the exhaust gas treatment device via an exhaust pipe. This quartz sand drying system has low drying costs and does not contaminate the quartz sand.

The utility model relates to the technical field of fertilizer production equipment, in particular to drying equipment for organic-inorganic compound fertilizer production, which comprises an inclined rotary drum, a high-position port of the inclined rotary drum is in butt joint with a feed port and an air outlet, a low-position port of the inclined rotary drum is in butt joint with a discharge port and an air inlet, and the discharge port and the air inlet are in butt joint. A heat preservation jacket is arranged on the outer wall of the inclined rotary drum, and a material lifting plate protruding inwards is arranged on the inner wall of the inclined rotary drum. The discharge port is located below the air inlet, and an air uniformizing swing plate is arranged between the discharge port and the air inlet; a rotary supporting device is arranged below the inclined rotary drum in a contact manner; according to the utility model, the fertilizer is uniformly dried, the quality and the production efficiency of the fertilizer are improved, the waste rate of heat energy is lower, and the production cost is saved.

A method of learning a rescue time period by an elevator system (101). The elevator system (101) includes an elevator car (103) moved by a machine (111) and a machine brake (120), arranged such that braking of the machine (111) by the machine brake (120) brakes motion of the elevator car (103). The method includes releasing the machine brake (120) for at least one test time period, at the end of which the machine brake (120) is engaged, detecting a corresponding at least one maximum travel speed of the elevator car (103) reached as a result of releasing the machine brake (120) for each at least one test time period, checking whether each at least one maximum travel speed is an acceptable speed, and setting the rescue time period based upon said checking.