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298results about How to "Improve assessment" patented technology

Closed-loop processing integrated process for high-efficiency air stripping and tail-gas ammonia recycling of ammonia-nitrogen wastewater

The invention relates to a closed-loop processing integrated process for the high-efficiency air stripping and the tail-gas ammonia recycling of ammonia-nitrogen wastewater, which is characterized in that: by selecting the types of fillers, tower internals and the like of an ammonia-nitrogen air-stripping tower and strengthening a gas-liquid mass transferring process, the ammonia removing efficiency is improved, and meanwhile, the gas-liquid volume ratio is reduced, thereby the energy consumption is markedly reduced; the invention provides a renewable ammonia-absorbing solution which can be used for efficiently absorbing the ammonia in air-stripping gas, and the ammonia is regenerated and desorbed to obtain strong ammonia water with the concentration of 10-25wt%, therefore, the high-efficiency recovery and the recycling of the ammonia in the air-stripping gas is realized, and the absorbing solution is recycled after being regenerated; the purified gas after absorption is used as the air-stripping gas for closed-loop circulating by adopting a closed-loop circulating technology, thereby the reaction heat in the absorbing process is effectively recovered, the energy consumption is further reduced, and meanwhile, the secondary pollution is eliminated; and the ammonia-removing and recycling processes of the wastewater are developed into a set of modularized process technologies by applying an integrated technology, thereby the technical requirements of industrial enterprises on processing the ammonia-nitrogen wastewater with different concentrations are satisfied.
Owner:NANJING UNIV OF TECH

Materiel tracking system of ERW welded pipe product line

The present invention relates to a material tracking method in manufacturing process of ERW welding tube. In the manufacturing process of ERW welding tube, all production processes from raw material hot rolling bending, longitudinal shearing strips, ERW tube welding, fine-finishing after welding, wholly quenching and tempering, tube processing, etc. are executed with material welding. In the processes realized with material tracking, the facilities of bar code printing and scanning, on-line jet printing, automatic generating of sequence number of steel tube, pipe end lettering, steel tube data collecting, production management, etc. are used for recording, coding, identifying, marking and controlling each procedure in the production process of welding tube from raw material to finished tube for obtaining effectively recording main parameter of each unit assembly of each steel tube in the production process, matching with a nondestructive flow detection device for recording and marking the defect existing in the raw material, half-finished product and finished product, thereby realizing the tracking to the production process of each steel tube. The analysis to reason for the generation of defective product, the time, the personnel of production group and the contemporary process parameter can be realized. The problem can be found and settled in time. The production management and examination are facilitated.
Owner:江苏嘉宝科技制管有限公司

Five-axis gear making machine tool position independent error detection method based on small-cutting-amount test piece

The invention relates to the technical field of machine tool geometric error measuring and calibration, in particular to a five-axis gear making machine tool position independent error detection method based on a small-cutting-amount test piece. The detection method comprises the following steps that firstly, a track is compiled according to the shape of a designed test piece, a processing code is generated, small-amount cutting is conducted on the designed test piece, and a cutting test piece with a specific to-be-tested object is obtained; secondly, sensitive direction coordinates of the cutting surface of the specific to-be-tested object on the cutting test piece are detected and acquired by utilization of an on-line measuring head, and coordinate mismatching values corresponding to the cutting surface are calculated; thirdly, a homogeneous kinematic equation containing a position independent error is established, and the mapping relation between the coordinate mismatching values corresponding to the cutting surface, and the position independent error is determined; and fourthly, a position independent error item is obtained according to the mapping relation between the coordinate mismatching values corresponding to the cutting surface, and the position independent error. The fixe-axis gear making machine tool position independent error detecting and identifying method is efficient and easy to operate.
Owner:NANJING UNIV OF TECH +1
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