Abstract: The invention discloses a serial high-temperature gas-cooled reactor nuclear energy system and an operating method thereof. The serial high-temperature gas-cooled reactor nuclear energy system includes a plurality of high-temperature gas-cooled reactors and a serial gas-cooled reactor. The high-temperature gas-cooled reactor includes a first reactor pressure vessel comprising a first reaction chamber for accommodating the first fuel element; a second reactor pressure vessel comprising a second reaction chamber interconnected with the first reaction chamber, allowing the first spent fuel in the first reaction chamber to enter the second reaction chamber.

Abstract: A solid acid catalyst has a macropore specific volume of about 0.30-0.50 ml/g, a ratio of macropore specific volume to specific length of catalyst particles of about 1.0-2.5 ml/(g·mm), and a ratio of specific surface area to length of catalyst particles of about 3.40-4.50 m2/mm. The macropore refers to pores having a diameter of more than 50 nm. An alkylation catalyst is based on the solid acid catalyst and can be used in alkylation reactions. The solid acid catalyst and alkylation catalyst show an improved catalyst service life and/or trimethylpentane selectivity when used in the alkylation of isoparaffins with olefins.

Abstract: A fluidized catalytic conversion method for maximizing the production of propylene includes the steps of: 1) contacting a heavy feedstock oil with a catalytic conversion catalyst having a temperature of 650° C. or higher for reaction; 2) contacting a hydrocarbon oil feedstock having an olefin content of 50 wt % or more with the catalytic conversion catalyst after the reaction of step 1); 3) separating a first catalytic cracking distillate oil and a second catalytic cracking distillate oil from the resulting reaction products; 4) separating an olefin-rich stream from the first catalytic cracking distillate oil; and 5) recycling the olefin-rich stream. The method can effectively improve the yield of propylene and realize an effective utilization of petroleum resources.

Abstract: A fluidized catalytic conversion method for producing light olefins includes the following steps: 1) introducing an olefin-rich feedstock into a fluidized catalytic conversion reactor, and contacting with a catalyst having a temperature of 650° C. or higher for reaction; 2) separating the reaction product vapor obtained by the reaction to obtain a stream comprising C5+ olefins; and 3) recycling at least a part of the stream comprising C5+ olefins to step 1) for further reaction. The fluidized catalytic conversion method can effectively improve the yield of light olefins, improve the selectivity and improve the ethylene/propylene ratio of the product.

Abstract: Disclosed is a movable loading machine with a twin telescopic boom structure, comprising a head wagon (1) and a tail wagon (2), wherein the tail wagon (2) is connected to the head wagon (1) via a traction pull rod, a twin telescopic boom (4) and a dual-stage triple-channel forked hopper (3) are mounted on the head wagon (1), the twin telescopic boom (4) comprises a main wagon loading boom (41) and an auxiliary wagon loading boom (42), which are mounted in parallel, the main wagon loading boom (41) and the auxiliary wagon loading boom (42) both are booms with a telescopic function, the dual-stage triple-channel forked hopper (3) comprises an upper-stage forked hopper (31) and a lower-stage forked hopper (32), the upper-stage forked hopper (31) and the lower-stage forked hopper (32) both have three channels, namely a main wagon loading channel (33), an auxiliary wagon loading channel (34) and a recovery channel (35), and the main wagon loading channel (33) is connected to the main wagon loading boom (41) and th

Abstract: Disclosed is a movable loading machine with a twin telescopic boom structure, comprising a head wagon (1) and a tail wagon (2), wherein the tail wagon (2) is connected to the head wagon (1) via a traction pull rod, a twin telescopic boom (4) and a dual-stage triple-channel forked hopper (3) are mounted on the head wagon (1), the twin telescopic boom (4) comprises a main wagon loading boom (41) and an auxiliary wagon loading boom (42), which are mounted in parallel, the main wagon loading boom (41) and the auxiliary wagon loading boom (42) both are booms with a telescopic function, the dual-stage triple-channel forked hopper (3) comprises an upper-stage forked hopper (31) and a lower-stage forked hopper (32), the upper-stage forked hopper (31) and the lower-stage forked hopper (32) both have three channels, namely a main wagon loading channel (33), an auxiliary wagon loading channel (34) and a recovery channel (35), and the main wagon loading channel (33) is connected to the main wagon loading boom (41) and th

Abstract: A transverse adjustment mechanism for a bilateral half-spring type load-carrying head is installed in the casing of the load-carrying head of the lifting unit of a pit type unwheeling machine, fixedly connected with the casing, directly connected to an adjustment unit at the end of the load-carrying head, and installed on a lead screw of the adjustment unit. The transverse adjustment mechanism includes an adjusting nut, an adjusting nut guide, a guiding tube, and a guiding sleeve, a nut mounting plate, a flange plate, a compression spring and a sliding shaft. The invention is currently applied to the transverse adjustment of the no-loading heads and transverse fine adjustment of the load-carrying heads of a China Railway High-speed (CRH) train. The structure is reliable and practical, safe, convenient and energy-saving to use and satisfies the demand for the synchronous lifting operation of the entire CRH train of the compatible pit type unwheeling machine.

Abstract: A transverse adjustment mechanism for a bilateral half-spring type load-carrying head is installed in the casing of the load-carrying head of the lifting unit of a pit type unwheeling machine, fixedly connected with the casing, directly connected to an adjustment unit at the end of the load-carrying head, and installed on a lead screw of the adjustment unit. The transverse adjustment mechanism includes an adjusting nut, an adjusting nut guide, a guiding tube, and a guiding sleeve, a nut mounting plate, a flange plate, a compression spring and a sliding shaft. The invention is currently applied to the transverse adjustment of the no-loading heads and transverse fine adjustment of the load-carrying heads of the CRH train. The structure is reliable and practical, safe, convenient and energy-saving to use and satisfies the demand for the synchronous lifting operation of the entire CRH train of the compatible pit type unwheeling machine.