40results about How to "Axial temperature difference is small" patented technology

The invention discloses a fixed bed fischer-tropsch synthesis method. A synthesis gas and high-temperature method fischer-tropsch synthesis oil enter a fixed bed fischer-tropsch synthesis reactor, and are subjected to fischer-tropsch synthesis reaction under the action of a catalyst; and effluent of the reactor is separated to obtain the gas, liquid hydrocarbon and water. According to the fixed bed fischer-tropsch synthesis method, the axial temperature difference of the fixed bed fischer-tropsch synthesis reactor is effectively reduced; the temperature distribution of a catalyst bed is more uniform; the selectivity of liquid hydrocarbon products is improved; and the diesel distillate efficiency of the synthesis oil is increased through further chain increase of the high-temperature method fischer-tropsch synthesis oil.

The invention belongs to the technical field of energy utilization, and provides a method for making an oil product taking methane as a raw material. The method comprises the following steps that (1)the raw material methane serves as virgin gas of reforming reaction after being decontaminated, purified and compressed through a purification compression system; (2) the virgin gas enters into a reforming reaction system and is translated into synthesis gas; (3) the synthesis gas enters a Fischer-Tropsch synthesis system for reaction to generate a Fischer-Tropsch synthesis product; (4) the obtained Fischer-Tropsch synthesis product is subjected to gas-liquid separation in a separation system to obtain a hydrocarbon product, a gas product and synthetic water respectively; (5) the hydrocarbon product enters a hydrocarbon product hydroisomerization system for hydrogenation and quality improvement to obtain the oil product not containing sulfur, nitrogen and arene; and the balance of pressureand material flow between a reforming reactor and a Fischer-Tropsch synthesis reactor is controlled through a pressure flow coupling control system. The method fully develops and utilizes potential value of the methane to achieve that the methane is translated into the oil product.

The invention discloses a motor multipath series-parallel water cooling system. The motor multipath series-parallel water cooling system comprises a water pipe at the tail end of the stator core yoke portion of the linear portion of an electric generator and a motor end winding external cooling waterway, and a water loop is composed of the water pipe at the tail end of the stator core yoke portion of the linear portion of the electric generator and the motor end winding external cooling waterway; the motor end winding external cooling waterway is composed of a cooling water pipe cooling system loop of a lower winding layer and a cooling water pipe cooling system loop of an upper winding layer; the cooling water pipe cooling system loop of the lower winding layer is composed of at least one set of circumferential water pipes which are communicated in the direction from the linear portion to the nose end, and the cooling water pipe cooling system loop of the upper winding layer is composed of at least one set of circumferential water pipes which are communicated in the direction from the linear portion to the nose end; the inner-diameter pipe wall of the cooling water pipe cooling system loop of the end lower winding layer is laid on the outer-layer surface of the lower winding layer; the outer-diameter pipe wall of the cooling water pipe cooling system loop of the end upper winding layer is laid on the inner-layer surface of the upper winding layer.