48results about How to "Low removal efficiency" patented technology

The invention discloses a magneto-rheological finishing method of easy-deliquescence crystals. The method includes the steps of firstly, preparing non-aqueous magneto-rheological finishing solution; secondly, adding the non-aqueous magneto-rheological finishing solution into a magneto-rheological machine tool circulating system for magneto-rheological finishing twice; thirdly, then using aromatic hydrocarbon to clean the easy-deliquescence crystals fast so as to complete the finishing. The method is simple in process flow and high in operability, and high-precision and ultra-smooth easy-deliquescence crystals which can satisfy the high, medium and low frequency band requirements of a strong-light optical system.

The invention discloses an integral device and method for efficient removal of flue gas pollutants through multistage washing wet process. Slurry partitioning and multistage washing are conducted, primary washing of flue gas is conducted with low-pH slurry so that the content of SO2 in flue gas can be reduced, then secondary washing is conducted on the flue gas with high-pH slurry, and finally the flue gas enters a ternary ultrasonic showering layer and enters an ultrasonic agglomeration chamber through a gas ascending channel; under the action of an acoustic amplifier in an inverse-V-shaped gas ascending cap, frequent collision occurs between particles to cause agglomeration, particles with size increased enter a water collection disc under clear water spraying of an ultrasonic showering disc, and then SO3 and fine particles are removed and efficient desulfurization is achieved. By means of the calcium-based wet desulphurization technique, ultra-low emission is achieved through synergism of desulphurization and dust removal, applicability to coal property is high, SO2, SO3 and particles are effectively removed, SO2 removing rate reaches 99.5%, SO3 removing rate reaches 80%, and particle removing rate reaches 85%.

The invention relates to an aerobic granular sludge reactor for treating sewage and a water treatment method thereof, in particular to an aerobic granular sludge reactor for treating sewage and a water treatment method thereof. The invention solves the problems that the aerobic granular sludge reactor has poor performance in start-up and stable operation, the aerobic sludge has poor properties and the sludge is prone to expansion at low temperature under the existing low-temperature conditions. The aerobic granular sludge reactor of the invention is characterized in that a riser thereof is co-axially sleeved with a downcomer thereof; an aerator is arranged at the bottom of the riser and communicated with an air compressor; a water outlet pipe is mounted at he height position which is 2/5-3/5 of a reactor body; a connecting hole is formed at the height position which is1/4-3/4 of the reactor body from the bottom thereof; and the ratios between the height and the inner diameter of the riser and the downcomer are both 9-15. The water treatment method of the invention mainly comprises the steps of inflowing, aerating, sludge/water separating, discharging and idling. The invention provides an effective method for controlling the discharge of nitrogen and phosphorus in low-temperature sewage, which is widely applicable to the synchronous removal of nitrogen and phosphorus from low-temperature sewage and has good environmental benefit.

The invention relates to a mechanical manufacturing process, and in particular relates to a process of manufacturing and material processing of sliding bearings. The invention discloses a sliding bearing machining process, comprising the following steps: blanking, end surface chamfering, end surface grinding, punching, chamfering of an oil filling hole, quenching and tempering, centerless grinding, squeezing, and surface grinding. Through the sliding bearing machining process, a sliding bearing is used for lowering frictional resistance of machine running, and is high in machining precision. On the premise of satisfying the machining precision of the sliding bearing, the efficiency and the product quality can be improved by the machining process.

The invention relates to a method for purifying materials containing metal impurities, in particular to a method for removing at least one metal impurity of iron, sodium and calcium from hydrocarbon materials, which comprises that the materials containing metal impurities are mixed with flash gas (low grade gas) in a low-pressure separator of a hydrogenation unit to obtain the materials with a higher impurity removal rate by a fixed bed layer of filtering materials, absorbent or catalyst. Compared with the prior art, the method in the invention has mild operation conditions and high impurity removal rate, and can be used in processing various materials containing metal impurities.

The embodiment of the present invention discloses a shielding film used for a cable, a manufacturing method of the shielding film, and a manufacturing method of a wire rod. The shielding film comprises a first metal layer used for shielding the electromagnetic interference, and the first metal layer is used to cover the ecderon of a conductor of the cable and is equipped with a conductive layer. The conductive layer is equipped with a second metal layer used for cooperating with the conductive layer to shield, and the second metal layer is equipped with an insulating layer which cooperates with the ecderon of the conductor to enable the conductive layer and the first metal layer to be insulating with the conductor and the outside world. According to the embodiment of the present invention, a same or better effect can be realized by changing a conventional process of needing multiple wrapping and braiding operations into a process of just needing to wrap the shielding film once, thereby reducing the consumption of the raw materials substantially, and reducing the production cost. Because of the reduction of technologies, the production efficiency also can be improved substantially, and the equipment investment is reduced. In addition, the processes, such as an electroplate process, etc., are not needed, so that an environment is not polluted.

The invention belongs to a technological method for removing iron and manganese in underground seawater out of marine culture water. The method for treating underground seawater used for aquiculture comprises the following steps of: quick oxygenation treatment: carrying out oxygenation treatment by an oxygenation appliance and maintaining the pH value of a water body to be 7.0-7.8, wherein [O2] is not less than 0.40[Fe2+]; biological oxidation treatment: hanging a hairbrush-shaped three-dimensional elastic filtering material of a PE material in a corridor of a reaction pool and forming a biologic filter membrane at the surface of a filler; detention treatment: detaining an insoluble substance in the elastic filtering material by the elastic filtering material in the reaction pool; precipitation treatment: precipitating in the corridor with the average water flow rate of 10-20m/h and the oxidation time of 1.5-3h; floatation treatment: treating by a floatation device, removing the fine particles of the iron and the manganese, carrying out secondary oxygenation and separating and removing most of insoluble compounds; and sand grain filtration treatment: filtering cinder and quartz sand by a two-section type filtering material filtration pool. The invention can ensure the content of dissolved oxygen in water, maintains the balance and the stability of microorganisms in the biologic filtering material and the water quality, has lower investment and running cost and increases the benefit of a culture system.

The invention relates to a recovery method of waste graphite crucibles and high-purity carbon powder, and belongs to the field of semiconductor materials. The method includes crushing waste graphite crucibles, sieving the crushed crucibles, and performing acid washing, water washing and drying to obtain high-purity carbon powder. A problem of recovering the waste graphite crucibles is solved so that resources are more fully utilized, and the cost of the high-purity carbon powder is reduced. The method is low-carbon, environmentally friendly and energy-saving. The waste graphite crucibles are low in impurity content after a plurality of times of application at high temperature, and the prepared high-purity carbon powder is low in cost, high in purity, and wide in particle size distributionand can be used for preparing semiconductor-grade silicon carbide powder.

The embodiment of the present invention discloses a shielding film used for a cable, a manufacturing method of the shielding film, and a manufacturing method of a wire rod. The shielding film comprises a metal layer used for shielding the electromagnetic interference, the metal layer is used to cover the ecderon of a conductor of the cable and is equipped with a conductive layer used for shielding, and the conductive layer is equipped with an insulating layer which cooperates with the ecderon of the conductor to enable the conductive layer and the metal layer to be insulating with the conductor and the outside world. According to the embodiment of the present invention, a same or better effect can be realized by changing a conventional process of needing multiple wrapping and braiding operations into a process of just needing to wrap the shielding film once, thereby reducing the consumption of the raw materials substantially, and reducing the production cost. Because of the reduction of technologies, the production efficiency also can be improved substantially, and the equipment investment is reduced. In addition, the processes, such as an electroplate process, etc., are not needed, so that an environment is not polluted.

The processing method of a bearing comprises (1) a step of preparation, and tempering a inner ring and an outer ring of the bearing; (2) a step of processing and forming the inner ring and outer ringof the bearing; (3) a step of fixing the inner ring and outer ring of the bearing by a clamping hoop; (4) piercing a through hole at the outer ring of the bearing in a axial direction; (5) a step of grinding and machining towards the inner and outer ring of the bearing; (6) adopting wire cutting to cut out a clamping block , and the cut clamping block enabling the through hole to be divided into afirst through hole and a second through hole which is arranged at both sides of a fracture of the outer ring of the bearing; (7) installing a ball bearing at a position between the outer ring of thebearing and the inner ring of the bearing; and (8) loading the clamping block into the fracture, and inserting a bolt into the first through hole and the second through hole for interference fit. Tempering towards the inner ring and outer ring of the bearing is carried out before the process, so that the ductility and toughness of the bearing are enhanced. The bearing has high bearing capacity, the service life compared with the existing full ball bearing is greatly prolonged, and the safety is high.

The invention discloses an energy-saving zero-emission low-temperature normal-pressure evaporation and crystallization system and a working method thereof, and belongs to the technical field of high-concentration brine zero emission. The system comprises an evaporation chamber, a crystallization kettle, an evaporation and condensation heat exchanger, a condensation chamber and a refrigeration chamber unit. Concentrated crystallization of strong brine and collection of condensate are achieved through circulation in the evaporation chamber and the condensation chamber according to the characteristic that the moisture carrying capacity of air at different temperatures is different, and high-concentration brine zero-discharge treatment at normal temperature and normal pressure is achieved. Thesystem is reasonable in design, high in automation degree, low in energy consumption, low in cost, zero in pollutant discharge, high in salinity and COD removal efficiency and remarkable in energy-saving effect, strong brine is treated into solid salt and clear water, and the system has good economic benefits, obvious environmental protection advantages and good application prospects.

The invention discloses a device and a method for removing water in coal, and belongs to the field of coal dehydration. Firstly, a coal sample is put into a reaction kettle and the reaction kettle isthen sealed; then high-pressure and high-temperature water vapor is introduced into the reaction kettle, and pressure maintaining is conducted; then a lower sealing piston is controlled to be opened to punish instantaneous ejection blasting, and the water vapor in the reaction kettle and water difficult to remove in the coal sample are discharged together. The reaction time is short, the operationis safe and stable and the cost is low. The device and method is suitable for large-scale production, so that the invention provides a new process breakthrough for further deep dehydration of coal.

The invention relates to a method for improving the efficiency of a contact oxidation tank in the wastewater treatment of neomycin. The method includes making neomycin wastewater pass through a hydrolysis acidification tank and then enter the contact oxidation tank, adding glucose, opening the reflux of a secondary sedimentation tank, opening inflow of the contact oxidation tank and adjusting to intermittent inflow; adding sodium carbonate to the contact oxidation tank and adjusting the pH of sludge in the contact oxidation tank to 8-8.5; introducing air to the bottom of the contact oxidationtank for aeration to control dissolved oxygen in a water outlet of the contact oxidation tank to be 2-4 mg/L to improve the efficiency of the contact oxidation tank. By means of the technical scheme,the environmental protection problem of the wastewater treatment in the production of the neomycin is solved, the difficulty in the treatment of high-concentration ammonia nitrogen is solved, the wastewater discharge meets the standard comprehensively, continuous stable operation reaching the standard is achieved, and the environmental risks are reduced. Key process steps in the wastewater treatment are found, and the suitable process is determined. A method for improving the sedimentation performance of the sludge and a method for increasing the retention time of nitrifying bacteria in the contact oxidation tank are found.

The invention discloses an inferior heavy oil treatment method. The treatment method comprises the following steps: introducing inferior heavy oil into a first hydro-processing unit; carrying out a hydrogenation reaction in the presence of hydrogen and a first hydro-processing catalyst, directly introducing a liquid phase effluent obtained after the reaction into a catalytic cracking unit withoutfractionation, separating a reaction product to obtain catalytic slurry oil, mixing the catalytic slurry oil with a first auxiliary agent, carrying out settlement separation after the mixing treatment, obtaining a first material and residues after separation; introducing the first material into a second hydro-processing unit, carrying out a hydrogenation reaction under the action of a second hydro-processing catalyst and hydrogen, introducing a liquid-phase effluent obtained after the reaction into a clarification unit, obtaining clarified oil after separation, and subjecting the clarified oilto further solid-liquid separation to obtain purified oil slurry. According to the treatment method, heavy oil is cleaned, catalytic slurry oil generated by catalytic cracking can be purified, solidsand sulfur in catalytic slurry oil are removed, and the economic value of the catalytic slurry oil is greatly increased.

A sewage treatment system, including a sewage tank, a degradation tank, an absorption tower, a recovery tank and a crystallization unit, the technical points are: the sewage tank is connected to the bottom air inlet of the absorption tower I, and the top exhaust end of the absorption tower I is connected to the The bottom air inlet of absorption tower II is connected, the top exhaust end of absorption tower II is connected with the bottom air inlet of absorption tower III, the top exhaust end of absorption tower III is connected with the atmosphere, absorption tower I and absorption tower The bottom discharge end of II is respectively connected with the recovery tank, the top exhaust end of the absorption tower I is connected with the bottom air inlet of the recovery tank, and the top exhaust end of the absorption tower II is connected with the top air inlet of the recovery tank , The liquid discharge end at the bottom of the recovery pool passes through the crystallization unit, the pump body II and the liquid inlet end at the top of the recovery pool to form a crystallization cycle. It has the advantages of simple and compact structure, low construction cost, convenient use, high processing efficiency and good processing effect.

The invention belongs to the technical field of recycling and processing of monocrystalline silicon polished wafers of integrated circuits, and particularly relates to a regeneration processing method of a substrate slice after an SOI bonding process. The method comprises the following steps: demoulding and cleaning a recovered SOI substrate slice, polishing the front surface of the substrate slice, cleaning the substrate slice for the first time, testing the flatness uniformity and thickness of the substrate slice, and cleaning the substrate slice for the second time. According to the regeneration processing method disclosed by the invention, the recovery of the substrate slice after the SOI bonding process is realized, so that the substrate slice reaches a substrate silicon slice with a high surface quality level again, the substrate slice can be circularly used for multiple times in the SOI bonding process, and the processing cost is far lower than the price of purchasing a new substrate silicon slice.

The invention provides a method for removing residual monomers from styrene-acrylic emulsion and relates to the technical field of emulsion polymerization. The method comprises the following steps: mixing propylene glycol methyl ether acetate and emulsion into a reaction kettle; and inserting a vapor guide pipe and a rod-like ultrasonic generator into the reaction kettle at 85 DEG C, opening a vapor valve, blowing saturated water vapor into the emulsion, staring the ultrasonic generator simultaneously to bubble and oscillate the emulsion, cooling the emulsion in the kettle to 40 DEG C after bubbling, and discharging to obtain the residual monomer-removed styrene-acrylic emulsion, wherein the gas outlet of the vapor guide pipe and the ultrasonic generator need to be completely immersed below the liquid level. Through low-frequency ultrasonic oscillation, the residual monomers and the propylene glycol methyl ether acetate enter an aqueous phase from the internal parts of colloidal particles and are driven by the saturated water vapor to be separated from the aqueous phase, so that the residual monomer content of the emulsion system is reduced. The method has the characteristic of high residual monomer removing efficiency.