55results about How to "Extend online time" patented technology

The invention provides a hydrocarbon oil hydrotreatment method. The method comprises the following steps: a hydrocarbon oil raw material and hydrogen contacts with a plurality of hydrogenation catalyst bed layers in a hydrotreatment device; and a main hydrogenation pretreatment reactor and a standby hydrogenation pretreatment reactor are alternately used, and the online time of the main hydrogenation pretreatment reactor is greater than the online time of the standby hydrogenation pretreatment reactor. The method allows solid particle impurities in inferior hydrocarbon oil to deposit in a hydrogenation pretreatment unit without greatly improving the running energy consumption of the apparatus, reduces the reaction temperature of a subsequent hydrotreatment unit, effectively protects a hydrogenation catalyst at a rear portion, alleviates the high temperature carbon deposit inactivation and prolongs the service cycle of the hydrogenation catalyst.

The invention provides a hydrotreating device which comprises a hydrotreating protection unit and a main hydrotreating unit, which are connected with each other in series, wherein the hydrotreating protection unit comprises a main hydrotreating protection reactor and a spare hydrotreating protection reactor, which are connected with each other in parallel, and the volume of the main hydrotreating protection reactor is larger than that of the spare hydrotreating protection reactor. The invention further provides the application of the hydrotreating device and a residual oil hydrotreating method. The method comprises the following steps of: introducing the residual oil and the hydrogen into the hydrotreating device, and alternately using the main hydrotreating protection reactor and the spare hydrotreating protection reactor in the process of hydrotreating, wherein the online time of the main hydrotreating protection reactor is longer than that of the spare hydrotreating protection reactor. The method provided by the invention is particularly suitable for machining the high-carbon content residual oil and the high-metal content residual oil. Furthermore, the bigger hydrotreating protection reactor is longer in online time, so that the invention is higher in reactor use ratio.

The invention relates to a roller grinding processing method, in particular to a grinding method for controlling the roughness of the surfaces of different rollers through sand wheels of the same type used on a numerical control roller grinding machine. The method comprises the following steps of: trimming the sand wheels to guarantee the balance of the sand wheels and the flatness and fineness of the working surfaces of the sand wheels; and after the sand wheels are trimmed, performing roller precision grinding in three steps, namely rough grinding, mediate grinding and fine grinding, wherein the grinding precision and the cylindricity of the rollers are smaller than 0.005mm, and the coaxiality is smaller than 0.005mm; and setting required grinding parameters according to different roughness requirement values, and carrying out grinding according to the roughness requirement values in three passes in a non-spark state. The method is simple and is easy to operate; the working efficiency of a machine tool and the working efficiency of a rolling machine can be improved; the roller replacement frequency of the rollers is reduced; the on-line time of the rollers is prolonged; the plate shape and the surface quality are improved; and therefore, the cost is reduced and the benefit is improved.

The present invention relates to the field of computer networks, in particular to a system and method for dynamic authentication and connection of users in a local area network on demand, which consists of three planes, which are respectively a data plane, a control plane and a management plane, and the connection between the data plane and the control plane Through Openflow protocol communication, the control plane and management plane run in the operating system and interact through inter-process communication. Among them: the data plane includes an Openflow switch, which is responsible for data interaction with the control plane, according to the flow issued by the forwarding policy module The table performs data forwarding; the control plane includes a user name resolution module and a forwarding policy module; the management plane includes a user management module, a group management module and a connection management module. The invention solves the risk problem that the user host in the ordinary local area network is online for a long time and the network topology is basically unchanged, and an attacker can use this condition to attack and steal information.

The invention discloses a manufacturing method of a graphite-contained high-speed steel centrifugal composite steel core roller, and belongs to the field of mechanical casting. Chemical elements of B and N are introduced in a traditional high-speed steel component, MC type and / or M2C type dotted and / or blocky high-hard alloy carbides, nitrides and borides with the total area percentage of 20% to 35% are dispersed and distributed in a work layer base body structure; through carbide, nitride and boride modification, graphite is subject to two-step treatment of modification and inoculation, graphite is precipitated in an original structure, and therefore the high-speed steel roller has the advantages of the specific high-temperature wear resisting of traditional high-speed steel and meanwhile the problem that an original traditional high-speed steel roller is large in friction coefficient is solved; wear-resisting performance of the high-speed steel is fully developed, the lubricating effect between the roller and a workpiece in the rolling process is achieved, and happening of the steel bonding phenomenon is avoided; due to the heat conduction performance and the lubricating characteristic of graphite, the defects that the high-speed steel roller is sensitive to hot impact and hot-cracking susceptibility, steel bonding is prone to happening, and surface roughing is prone to happening can be overcome, and particularly when a finished product rack is used, the surface bright degree of a rolled material is obviously improved.

The invention discloses a battery energy storage system integrating energy type and power type. The system comprises a power grid bus, as well as a coordination type energy storage subsystem, a power type energy storage subsystem and an energy type energy storage subsystem which are connected with a power grid bus in parallel, wherein the coordination type energy storage subsystem, the power type energy storage subsystem and the energy type energy storage subsystem are respectively connected with bidirectional inverters in series and respectively connected with the power grid bus through the circuits of the bidirectional inverters. The system manages proportions of complex energy storage allocated by the power interval of a power grid, is classified into the power type, the coordination type and energy type energy storage subsystems, realizes that a whole energy storage power station meets the requirement of the power grid through power allocation when the power requirement change of the power grid is met within a large range, respectively gives the advantages of power type batteries, coordination type batteries and energy type batteries into full play and complements the disadvantages of the batteries, realizes the performance optimization, is simple and flexible, and easy to realize, reduces the equipment investment, improves the equipment utilization ratio, and has good economic benefits.