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Method for operating a textile machine which is provided with a vacuum device and produces crosswound bobbins

The invention relates to a method for optimizing the number of workstations, which can be supplied with additional vacuum simultaneously on account of circuits, of a textile machine which has a multiplicity of workstations, wherein the textile machine has a vacuum system with at least one vacuum assembly, the vacuum output of which can be increased via the rotational speed of its drive motor, regulated by monitoring of the vacuum level, until a maximum rotational speed is reached. There is provision according to the invention for a value for a rotational speed reserve to be calculated from the known maximum rotational speed of the drive motor of the vacuum assembly, which maximum rotational speed defines the maximum vacuum output of the vacuum system of the textile machine, and from a prevailing actual rotational speed of the drive motor of the vacuum assembly, which actual rotational speed results from the current vacuum requirement of the textile machine, using which value for a rotational speed reserve the number of workstations is determined which can still be supplied with additional vacuum. A maximum number of workstations which can be supplied simultaneously with additional vacuum is determined from this number, increased by the number of workstations which are currently already being supplied with additional vacuum on the basis of the actual rotational speed of the drive motor, and vacuum requirements are rejected which exceed this maximum number of circuits.
Owner:SAURER GERMANY GMBH & CO KG

Preparation method of micro-nano-scale desulfurization adsorbent

The invention belongs to the field of biogas purification in the pulping and papermaking industry, and particularly relates to a preparation method of a micro-nano-scale desulfurization adsorbent. Thepreparation method of the micro-nano-scale desulfurization adsorbent is mainly used for desulfurization of biogas produced by pulping and papermaking comprehensive wastewater. The preparation methodof the micro-nano-scale desulfurization adsorbent disclosed by the invention comprises the steps of mixing nano-scale iron oxide particles with an inorganic pore-forming agent, an organic pore-formingagent and a base material; adding water into the mixture and uniformly stirring; performing extrusion-molding the mixture; then calcinating the mixture at a high temperature and cooling the mixture to obtain the micro-nano-scale desulfurization adsorbent. According to the preparation method, the micro-nano structure of the desulfurization adsorbent is constructed by preparing the nano-scale ironoxide particles and using the micro-nano channel technology, thereby greatly increasing the specific surface area of the desulfurizing agent, greatly improving the adsorption of the nano-scale iron oxide particles for hydrogen sulfide, further increasing the maximum amount of sulfur which can be removed by the desulfurizing agent in unit mass and breaking through the technical bottleneck of low efficiency of biogas desulfurization.
Owner:SHANDONG HUATAI PAPER

Hard disk bearing disk

The invention discloses a hard disk bearing disk. The hard disk bearing disk comprises an additional circuit board and a clamping assembly. The additional circuit board is provided with two side edgeswhich are opposite to each other and parallel to the installation direction of the hard disk bearing disk. And a distance is kept between the clamping assembly and the two side edges. The clamping assembly comprises a fixing piece, an operating piece and a clamping and fixing piece. The fixing piece is fixed on the additional circuit board. The operating member is slidably disposed on the fixingmember. The operation piece is provided with a guide groove. The guide groove comprises a clamping section and a reducing section which are connected. The clamping piece comprises a head part and a body part which are connected. The head portion is wider than the body portion, and the body portion penetrates through the guide groove and the fixing piece in a sliding mode. When the operation pieceis located at the clamping position, the head portion is located at the clamping section, and the body portion is clamped to the machine shell. When the operation piece moves from the clamping position to the releasing position, the reducing section moves towards the head part, so that the operation piece abuts against the head part, the head part is separated from the guide groove, and the body part is separated from the machine shell.
Owner:INVENTEC PUDONG TECH CORPOARTION +1

A domestication process of gradient dynamic activated sludge under aerobic conditions

The invention relates to a process for domesticating gradient dynamic active sludge under an aerobic condition. The process comprises the following steps: (1) preparing simulated wastewater as a culture medium for later use according to a mass ratio of 100:75:5:1 of BOD5:C:N:P; (2) adding the active sludge and the culture medium obtained in the step (1) into an SBR (styrene butadiene rubber) reaction tank with an effective volume of 15L, stirring for aeration, and changing water once every 12 hours under the aerobic condition, namely each sludge age is 12 hours; changing 3L of water each time and controlling the DO value to be 1.5mg / L from the first day to the sixth day; changing 4.5L of water each time and controlling the DO value to be 2.0mg / L from the seventh day to the twelfth day; and changing 6L of water each time and controlling the DO value to be 2.5mg / L from the thirteenth day to the eighteenth day. According to the process provided by the invention, the culture medium is added in a gradient manner during domestication, the add amount is different in different periods, and the gradient is increased, so that the microbial quantity can be increased as much as possible; and by adopting the process provided by the invention, after 18 days of culture domestication, the color of the sludge is changed from black into reddish brown, the sludge has obvious fishy smell, and the sedimentation performance of the sludge is obviously improved.
Owner:ZHEJIANG SCI-TECH UNIV
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