39results about How to "Improve load shock resistance" patented technology

A production method of a quenched and tempered high-intensity Q890D super-thick steel plate comprises processing steps as follows: liquid iron pretreatment, converter steelmaking, secondary refining, continuous casting including dynamic soft reduction and electromagnetic stirring, heating, rolling, pre-straightening, online quenching, offline quenching, tempering, finishing, performance examination and ultrasonic flaw detection. Steel comprises chemical composition in percentage as follows: not more than 0.16% of C, 0.20%-0.40% of Si, 1.30%-1.40% of Mn, not more than 0.015% of P, not more than 0.003% of S, 0.03%-0.05% of Als, not more than 0.10% of Nb+V+Ti, not more than 1.0% of Cu+Ni, 0.35%-0.45% of Cr, 0.45%-0.70% of Mo, not more than 0.0025% of B and the balance of Fe and unavoidable impurities. The produced high-performance quenched and tempered high-intensity Q890D super-thick steel plate with a thickness ranging from 100 mm to 120 mm can meet the manufacturing requirement of heavy machinery for a mine, a port and the like.

The invention relates to a desulphurization wastewater zero discharge system of a coal-fired unit of a thermal power plant. The system sequentially comprises a sequencing batch reactor, a double-medium filter, a Na / Cl bed, an electrodialysis device, a high-pressure water pump, a security filter, a primary reverse osmosis device and secondary reverse osmosis device. The sequencing batch reactor is used for removing metal ions and sulfate radicals in water. The double-medium filter is used for furthermore removing suspended matter in water. The Na / Cl bed is used for removing high-valence ions such as calcium ions and magnesium ions in water. The electrodialysis device is used for concentrating wastewater. The high-pressure water pump and the security filter are used for transferring the wastewater and removing fine particles in the wastewater. The primary reverse osmosis device and the secondary reverse osmosis device are used for performing further desalination on water. The desulphurization wastewater zero discharge system has the advantages that the sequencing batch reactor is adopted, the load impact resistance of the system is improved, and water can be clear and conditioned; the ion selecting and adsorbing function of the Na / Cl bed is adopted, and crystallized products reach industrial purity; by means of high salt content of electrodialysis concentrated water, regeneration of the Na / Cl bed is achieved; the secondary reverse osmosis device is adopted, the desalination efficiency is high, and investment is saved; no new substances is generated in the whole process.

The invention relates to a dynamic multistage anoxic / aerobic sewage treatment method. The method comprises steps of: installing an aeration apparatus at bottom of an aeration tank; establishing a dynamic multistage anoxic / aerobic sewage treatment process model; determining an oxygen supply energy consumption performance function and constrained conditions of the dynamic multistage anoxic / aerobic sewage treatment process; dynamically determining two technological parameters of area distribution for anoxic zone and aerobic zone, and an operation period of the dynamic multistage anoxic / aerobic process, based on the above dynamic multistage anoxic / aerobic sewage treatment process model and the oxygen supply energy consumption performance function; and forming a configuration containing a plurality of anoxic zones and aerobic zones in the aeration tank by adjusting aeration rate of the aeration apparatus. The method of the invention can raise ammonia nitrogen removal capability in the sewage treatment process and reduce energy consumption of the sewage treatment process on the premise of guaranteeing stable and standard reached water outlet.

The invention relates to a production method of a quenched and tempered high-strength Q890E super-thick steel plate. The process steps are as follows: pretreatment of molten iron, steel-making by a converter, secondary refining, continuous casting (dynamic soft reduction and electromagnetic stirring), heating, rolling, pre-straightening, online quenching, offline quenching, tempering, finishing, performance testing and ultrasonic flaw detection. Steel comprises the following chemical components in percentage by weight: not more than 0.16% of C, 0.20-0.40% of Si, 1.30-1.40% of Mn, not more than 0.015% of P, not more than 0.003% of S, 0.03-0.05% of Als, not more than 0.10% of Nb+V+Ti, not more than 1.0% of Cu+Ni, 0.30-0.50% of Cr, 0.45-0.70% of Mo, not more than 0.0025% of B and the balance of Fe and inevitable impurities. The CEV (carbon equivalent) is controlled to be not more than 0.60, and the CEV is calculated according to the following formula: CEV=C+Mn / 6+(Cr+Mo+V) / 5+(Ni+Cu) / 15. The produced high-performance 100-120mm quenched and tempered high-strength Q890E super-thick steel plate can meet the needs for manufacturing heavy machinery in mines, ports and the like.

The invention discloses an automatic medicine adding control method and a device for chemically-assisted dephosphorization in sewage treatment. A total-phosphorus on-line monitor and an iron-ion on-line monitor are used for respectively sampling and monitoring the middle position of the aerobic zone of a biological reaction tank of a sewage treatment plant and the water outlet of a secondary sedimentation tank; the total phosphorus concentration of a water sample on the middle position of the aerobic zone of the biological reaction tank and the iron-ion concentration in a water sample on the water outlet of a secondary sedimentation tank are collected; meanwhile, the water inlet flow of the biological reaction tank is monitored by a flowmeter; according to the total phosphorus concentration of the water sample on the middle position of the aerobic zone of the biological reaction tank and the water inlet flow of the biological reaction tank, the medicine adding amount is determined; and meanwhile, the medicine adding amount is rectified by the total phosphorus concentration calculated by the iron-ion concentration in the water sample on the water outlet of the secondary sedimentation tank. The medicine adding amount determined by the invention is more economic and reasonable, the effluent total phosphorus of a sewage treatment plant is feasibly guaranteed to reach the standard,the effluent stability is improved, the effluent water quality stability is guaranteed, and the resistance to impact load of the chemical synchronous dephosphorization technology is enhanced.

The invention relates to a method for preparing marsh gas through a lignocellulose hydrolysate. The method comprises the following steps of acid production, wherein the lignocellulose hydrolysate is added into a reaction bottle with a stirring function, then an inoculum secondary sedimentation tank sludge is added according to a certain proportion, activated carbon is added, the mixture is evenlystirred and closely placed in a water bath heating device, and an air bag is connected to a reactor bottle plug and used for balancing the pressure of a reaction device; stirring is conducted on timeevery day, after 3 days, an acid production reaction stage is ended, and a fermentation solution with rich organic acid is obtained; methane production, wherein a, anaerobic granular sludge is subjected to domestication; b, the obtained acid production fermentation solution is taken out, subjected to centrifugal solid-liquid separation and diluted to the proper load, the pH is adjusted, and then the solution enters a methane production reactor; by controlling the mass loading rate, the aim of adjusting the system load is achieved, so that the methane production process is normally conducted; remaining sludge can be used as the inoculum and continues to be used for an acid production reaction in the later period through the hydrolysate; a water outlet of the methane production reactor is used for adjusting the load of materials entering a UASB, and the water is returned to an adjustment tank for recycling.

The invention relates to a production method of a quenched and tempered high-strength Q690E super-thick steel plate. The process steps are as follows: pretreatment of molten iron, steel-making by a converter, secondary refining, continuous casting (dynamic soft reduction and electromagnetic stirring), heating, rolling, pre-straightening, online quenching, offline quenching, tempering, finishing, performance testing and ultrasonic flaw detection. Steel comprises the following chemical components in percentage by weight: not more than 0.14% of C, 0.20-0.40% of Si, 1.00-1.20% of Mn, not more than 0.015% of P, not more than 0.003% of S, 0.03-0.05% of Als, not more than 0.10% of Nb+V+Ti, not more than 1.0% of Cu+Ni, 0.40-0.60% of Cr, 0.45-0.70% of Mo, not more than 0.0025% of B and the balance of Fe and inevitable impurities. The CEV (carbon equivalent) is controlled to be not more than 0.57, and the CEV is calculated according to the following formula: CEV=C+Mn / 6+(Cr+Mo+V) / 5+(Ni+Cu) / 15. The produced high-performance 100-120mm quenched and tempered high-strength Q690E super-thick steel plate can meet the needs for manufacturing heavy machinery in mines, ports and the like.

The invention relates to a production method of a quenched and tempered high-strength Q500D super-thick steel plate. The process steps are as follows: pretreatment of molten iron, steel-making by a converter, secondary refining, continuous casting (dynamic soft reduction and electromagnetic stirring), heating, rolling, pre-straightening, online quenching, offline quenching, tempering, finishing, performance testing and ultrasonic flaw detection. Steel comprises the following chemical components in percentage by weight: not more than 0.15% of C, 0.20-0.40% of Si, 1.00-1.30% of Mn, not more than 0.015% of P, not more than 0.003% of S, 0.03-0.06% of AlT, not more than 0.10% of Nb+Ti+V, not more than 1.0% of Cu+Ni, 0.40-0.70% of Cr, 0.30-0.60% of Mo, not more than 0.0025% of B and the balance of Fe and inevitable impurities. The CEV (carbon equivalent) is controlled to be not more than 0.58, and the CEV is calculated according to the following formula: CEV=C+Mn / 6+(Cr+Mo+V) / 5+(Ni+Cu) / 15. The produced high-performance 100-120mm quenched and tempered high-strength Q500D super-thick steel plate can meet the needs for manufacturing heavy machinery in mines, ports and the like.

The invention relates to a stack baffling type microbial fuel cell and a method for treating waste water and achieving the zero energy consumption by using the stack baffling type microbial fuel cell, relates to a microbial fuel cell and a method for treating the waste water, and aims at solving the problems that a traditional device for treating the waste water has the huge energy consumption and can not be used for effectively recovering energy and the waste water treated by the traditional device can not reach the standard. The stack baffling type microbial fuel cell comprises an open reaction tank body, a biological fuel cell, a water inlet, a water outlet, an insertion opening, a water intake, a water storage tank, a water pump, a high-level water tank, a liquid flowmeter and a sealing cover plate. The method for treating the waste water comprises the following steps that the waste water enters the high-level water tank from the water storage tank by being pumped through the water pump, and the waste water inside the high-level water tank flows into the water inlet of the stack baffling type microbial fuel cell under the action of gravity; the liquid flowmeter controls the flow velocity of the waste water entering the water inlet; the waste water is degraded through microbes attached to anodes of multiple carbon fiber brushes. According to the invention, the stack baffling type microbial fuel cell can be obtained, and the zero energy consumption of beer waste water treatment can be achieved.

The invention relates to a three-phase separator of an efficient anaerobic bioreactor, comprising a three-phase separator box body and gas collecting hoods, wherein the three-phase separator box body is internally provided with a plurality of the gas collecting hoods; one ends of two side plates of the three-phase separator box body are connected with a marsh gas storage chamber so as to prevent sludge loss, reduce influences on a subsequent treatment process and furthest collect a marsh gas by effectively separating granular sludge, flocculent sludge and the marsh gas which are contained in a mixed solution; the marsh gas storage chamber is directly communicated with the gas collecting hoods so as to solve the problem of easy blockage caused in such a way that a pipeline is used for connection; the gas collecting hoods have certain installation slopes so as to be beneficial to the collection of the separated marsh gas into the marsh gas storage chamber; and the collected marsh gas exhausted from a gas outlet positioned on the top end of the marsh gas storage chamber can be recovered to be used for marsh gas power generation or purified to be used as a natural gas. The three-phaseseparator can be conveniently integrally arranged in the efficient anaerobic bioreactor, not only ensures the accuracy of equipment, but also more enhances the quality of outflow water without gas leakage or sludge loss, enhances the separating efficiency and also reduces the construction cost.

An integrated high-density coal water treatment clarifier comprises an agglomerating zone, a flocculating zone, a water distributing zone, a settling zone, an inclined plate, a clear water zone and agravity filtration zone, wherein the flocculating zone is formed in one side of the agglomerating zone, and is communicated with the bottom of the agglomerating zone; the water distributing zone is arranged on one side of the flocculating zone; the water distributing zone is communicated with the settling zone; the clear water zone is arranged on one side of the settling zone; the settling zone iscommunicated with the clear water zone; a filtering zone is arranged on one side of the clear water zone, and clear water in the clear water zone can flow into the filtering zone. Through the integrated high-density coal water treatment clarifier, coagulation is divided into an agglomerating process and a flocculating process; in the agglomerating zone and the flocculating zone, an appropriate speed gradient G value and an appropriate dwell time T value for the agglomerating process and the flocculating process are controlled in a mechanical stirring form respectively; meanwhile, through internal circulation of sludge in a flocculating tank, the flocculating effect of coal-containing wastewater is strengthened, the floc density is increased, mud-water separating and settling performance are enhanced, the coal-containing wastewater is rapidly, efficiently and stably treated effectively, and a recycling standard thereof is met; therefore, the integrated high-density coal water treatmentclarifier has good economic and environmental benefits.

The invention discloses a method for wastewater zero discharging of the leather industry. The method is characterized by comprising the following steps of 1, cow leather preprocessing, 2, softening processing, 3, oxidation aeration processing, 4, sedimentation, and 5, filtering and oil removal. According to the softening processing in the leather manufacturing process, fur is prevented from being degraded by a chemical reducing agent, and COD and BOD loads in a depilation waste liquid are reduced. According to the oxidation aeration processing, the load impact resistance is large; the physical technology is utilized for reducing the dosage of harmful chemical substances and lowering the suspended matter content in wastewater, a solid-liquid separator is used for solid-liquid separation, and the amount of metal ions is decreased; according to the step of filtering and oil removal, oil components are removed, the processing efficiency is high, it is ensured that water flows out stably, the water quality is reliable, resources are saved, and the environment is protected.

The invention discloses a real-time intelligent reclaimed water treatment device. The device consists of five parts, namely a regulating tank, a biochemical reaction tank, a sedimentation tank, a reclaimed water tank and a system operation controller. The system detects the water quality of inlet water and outlet water in real time; according to the detected inlet water quality index value, the total hydraulic retention time of the system is adjusted and the sludge load of the system is increased by automatically turning on or off or adjusting the output air volume of a regulating tank air blower, adjusting the sludge return amount of the sedimentation tank and the air blast amount of the biochemical reaction tank and turning on or off or adjusting the reflux amount of the biochemical reaction tank flowing back to the regulating tank in advance, so the system can well cope with large impact load; by detecting the quality of the effluent, unqualified effluent completely flows back to the regulating tank for deep treatment, so that the quality of the effluent is ensured to be qualified; and the regulating tank is used as an anaerobic nitrification tank and a primary aerobic tank according to the water quality of inlet and outlet water, and closely participates in the biochemical treatment process of the system.

The invention discloses a treatment method for printing, dyeing and desizing wastewater with a high concentration. The innovation point of the invention is that the treatment method comprises the following steps: treating desizing wastewater in a UASB anaerobic pool, allowing effluent of the UASB anaerobic pool to successively enter a coagulation sedimentation pool, an aeration activated sludge reaction pool and a hydrolytic acidification pool, simultaneously carrying out denitrification, sulfur oxidation, sludge adsorption proliferation and sludge concentration in the hydrolytic acidification pool, recycling nitrate oxide in an aerobic pool so as to enable suspended particles in the effluent of the UASB anaerobic pool to be absorbed, discharging the clarified water into a contact oxidation pool, carrying out sedimentation, and discharging the clarified water when the clarified water reaches discharge standards. Compared with aerobic biological treatment technology, the treatment method provided by the invention has a higher energy efficiency ratio in the treatment of wastewater with the high concentration, can thoroughly degrade degradation-resistant organic pollutants in wastewater, reduces water concentration, improves biodegradability of pollutants in the wastewater and enhances treatment efficiency and effluent water quality standards.

The invention discloses a two-stage ozonation-biological contact coupled advanced sewage treatment method and a device thereof. Sewage or RO concentrated water subjected to biochemical pretreatment issequentially subjected to ozonation, biological contact, ozonation and biological contact for combined treatment, biochemical effluent at the rear end flows back to ozonation inflow water at the front end, and the sewage is circularly treated in an ozonation-biological contact system through backflow; due to the fact that the biodegradability of the sewage is improved to a certain extent every time when the sewage flows through the ozonation stage, biodegradable ozonation products are degraded in time in the biochemical treatment stage, and the synergistic coupling effect of biodegradabilityimprovement of ozonation and low-cost mineralization of biochemistry is enhanced by controlling the biochemical effluent reflux ratio. According to the method, the treatment efficiency is improved under the condition of the determined total ozone addition amount, and the ozone consumption is reduced under the condition of a determined removal rate; and the method has important significance for reducing the investment cost, the operation cost and the engineering land occupation of advanced sewage treatment.

The invention relates to a washing bleaching and dyeing wastewater treatment method. The washing bleaching and dyeing wastewater treatment method comprises the following processing steps of: (1) wastewater pretreatment; (2) physico-chemical precipitation treatment; (3) biological selection treatment; (4) aeration treatment in an improved oxidation ditch; and (5) natural sedimentation treatment. Aiming at the characteristic of large water consumption in washing bleaching and dyeing industries, a physical chemistry technology and a biological technology are used for treating washing bleaching and dyeing wastewater according to the washing bleaching and dyeing wastewater treatment method, and therefore, the washing bleaching and dyeing wastewater treatment method realizes the production recycling of most water while leading the treated wastewater to reach the Discharge Standard of Water Pollutant for Dyeing and Finishing of Textile Industry GB 4287-92. By adopting the washing bleaching and dyeing wastewater treatment method, the discharged wastewater is reduced, resources are saved and environments are protected; and simultaneously, the washing bleaching and dyeing wastewater treatment method has the characteristics of low investment cost, low energy consumption, high treatment efficiency, great capacity of resisting load impact, low sludge yield and high recycling ratio of reclaimed water.

The invention discloses a precision tubular microporous aerator mounting and detecting system and a precision tubular microporous aerator mounting and detecting method. The precision tubular microporous aerator mounting and detecting system consists of a workbench, a mounting facility and a detecting facility, wherein the mounting facility and the detecting facility are arranged on the workbench; through a mounting pneumatic switch and a detection switch, mounting and detection of tubular microporous aerators are switched; through an air compressor or an air blower, an air source is generated; the air source is connected with a pressure reducing valve through a pipeline; a filter is connected to a pneumatic valve; the mounting pneumatic switch is mounted between the filter and the pneumatic valve; the mounting pneumatic switch controls the air source entering the pneumatic valve; the mounting facility and the detecting facility are connected with a main controller; and the main controller collects, stores, sorts and analyzes data information of each tubular microporous aerator. The precision tubular microporous aerator mounting and detecting system is scientific in structure, reliable in performance, easy to manufacture, convenient to use, easy to operate and precision in mounting, and is especially applicable to urban sewage treatment, new construction and expansion of a large factory and reconstruction of an old aeration tank.

The invention provides a take-off and landing device for an ultra-light small unmanned aerial vehicle. The take-off and landing device is composed of a skid plate, a vertical tail fixing piece and a pulley mechanism. According to a size and a position of the airplane vertical tail, two pairs of vertical tail fixing piece clamping grooves and two square tire limiting holes are arranged in the skidplate. The two vertical tail fixing frames penetrate through the clamping grooves to be fixedly connected with the airplane vertical tail; and the two square tire limiting holes are limiting mountingholes corresponding to the positions of corresponding vehicle-mounted fixing devices so that a undercarriage not only can automatically take off and land in a sliding manner, but also can take off ina vehicle-mounted manner and land in a sliding manner when a runway environment is poor. The device has good compression resistance, tensile strength and torsion resistance performance, a plate structure of a main body greatly increases a contact area when the undercarriage lands so that an impact load caused by the dead weight of an aircraft at the moment of landing is dispersed, an impact load resistance capability is improved, and damage to an airplane during landing is reduced to the minimum.

The invention belongs to a method for efficiently treating coal gasification wastewater in a biochemical mode. Specifically, a logical sequence of units in a conventional A2O2 process is re-arranged according to pollutant removal characteristics; reaction conditions are improved, removal efficiency, on a respective specific pollutant, of each unit is improved, efficient removal of the pollutants in wastewater is realized by a system, and water quality of outlet water is improved.

The invention discloses an anti-load-impact rural sewage treatment device and method, and relates to the technical field of sewage treatment.The sewage treatment device comprises a tank body, and an inner cavity of the tank body is divided into an anaerobic zone, a first aerobic zone, an anoxic zone, a second aerobic zone and a settling zone from one end to the other end of the tank body; aeration devices are arranged in the anaerobic zone, the first aerobic zone, the anoxic zone and the second aerobic zone; the anaerobic zone and the anoxic zone are connected with water inlet pipes; the settling zone is connected with a water outlet pipe; and the nitration liquid reflux device controllably refluxes the mixed liquid in the second aerobic zone to the anoxic zone. According to the arrangement, the aeration device is used for controlling the gas flow supplied to each functional area, so that the functions of the functional areas can be changed, and the functional areas are adjusted in advance according to the water quantity fluctuation and water quality concentration fluctuation of rural sewage so as to adapt to the current situation that the water quality and water quantity of the rural sewage are unstable, and the sewage treatment effect is ensured; and the load impact resistance of the integrated sewage treatment equipment is improved.

The invention discloses a micro gas-turbine power station, and belongs to the field of power generation equipment. The power station mainly comprises a digital electric controller, a power generator and a micro gas turbine, wherein a plate fin type heat regenerator is arranged on the micro gas turbine, and the plate fin type heat generator surrounds the outer part of the micro gas turbine; the digital electric controller comprises a controllable boosting and rectifying system, an inverter grid-connected system and a central control system; the micro gas turbine is coaxially flexibly connected with the power generator; the power generator, the controllable boosting and rectifying system and the inverter grid-connected system are sequentially connected through cables; and the controllable boosting and rectifying system and the inverter grid-connected system are connected with the central control system through cables. According to the power station disclosed by the invention, noises are small, tail gas is convenient to recycle and maintenance cost is low; and the power station is wide in applied range, and effectively overcomes the problem that the power station cannot be applied in the distribution type power supply field due to the fact that existing diesel engine power generation equipment has a cylinder pulling phenomenon.

The invention provides a production method of a tempered high-strength Q800D super-thick steel plate. The production method comprises the processing steps of molten steel pre-treatment, converter steelmaking, external refining, continuous casting (dynamic soft reduction and electromagnetic stirring), heating, rolling, pre-straightening, online quenching, off-line quenching, tempering, finishing, performance examination and ultrasonic flaw detection, and is characterized in that steel comprises the following chemical components: not more than 0.16% of C, 0.20-0.40% of Si, 1.10-1.30% of Mn, not more than 0.015% of P, not more than 0.003% of S, 0.03-0.06% of Als, not more than 0.10 of Nb, V and Ti, not more than 1.0% of Cu and Ni, 0.40-0.75% of Cr, 0.50-0.75% of Mo, not more than 0.0025% of B and the balance of Fe and inevitable impurities; CEV (carbon equivalent) is controlled to be not more than 0.60 and is computed according to the formula C+Mn / 6+(Cr+Mo+V) / 5+(Ni+Cu) / 15. The produced high-performance 100-120mm tempered high-strength Q800D super-thick steel plate meets the requirements for manufacturing heavy machinery for mines, ports and the like.

The invention discloses a method for treating domestic sewage in rural areas, which is characterized by comprising the following steps: step 1, a hydrolysis regulating pond is arranged for regulating the supply volume of domestic sewage; step 2, a hydrolysis tank is arranged, flexible plastic combined packings are put into the hydrolysis tank and arranged in an array, and PE (polyethylene) fiber strips for allowing microbe to perch are also arranged on the flexible plastic combined packings; step 3, a contact oxidation tank is arranged for aerobic treatment of the sewage; step 4, an aeration device is arranged for providing sufficient oxygen for the contact oxidation tank in the step 3; step 5, a setting tank is arranged for removing the phosphorus molecules in the sewage; step 6, a denitrification tank is arranged for denitrification to the sewage treated in the step 5; and step 7, the hydrolysis regulating pond, the hydrolysis tank, the contact oxidation tank, the setting tank and the denitrification tank are communicated with one another in sequence through pipelines. The invention further discloses a system for treating the domestic sewage in the rural areas.

The invention discloses a biochemical treatment-ozonation coupled sewage treatment method and application thereof. The sewage treatment process comprises pretreatment, biochemical treatment and advanced treatment, wherein the advanced treatment is ozonation; outlet water of a rear-end ozone oxidation unit flows back to a front-end biochemical unit, a sewage biochemical treatment system and a sewage advanced treatment ozonation system which are relatively independent are combined, and the outlet water reflux ratio of the ozonation unit is adjusted and the reflux outlet water flows back to different positions of the biochemical unit, the ozonation effect of advanced sewage treatment can be improved, and meanwhile, the reduction of the ozonation treatment cost, the engineering investment andthe occupied area of the advanced sewage treatment is realized. The method disclosed by the invention is applied to advanced sewage treatment, municipal sewage treatment or industrial sewage treatment, and the degradation capacity of a front-end biochemical treatment system on COD (Chemical Oxygen Demand), ammonia nitrogen and total nitrogen and the operation stability of the system can be improved through the dilution effect of reflux sewage of the ozonation unit and the toxicity reduction effect of ozone in the reflux sewage.

The invention discloses an ozonation-biochemical coupled water treatment method which comprises the following steps: sequentially carrying out front-end ozonation treatment and rear-end biochemical treatment on water to be treated, returning rear-end biochemical effluent to front-end ozonation inlet water, and carrying out flow return to circularly treat the water to be treated in an ozonation-biochemical system for multiple times. Due to the fact that the biodegradability of the to-be-treated water is improved to a certain extent in the ozonation stage each time, biodegradable ozonation products in each time are degraded in time in the biochemical treatment stage, and the synergistic coupling effect of biodegradability improvement of ozonation and low-cost biochemical mineralization is enhanced by controlling the biochemical effluent return ratio. According to the method, the treatment efficiency can be improved under the condition of the determined total ozone addition amount, the ozone consumption can be reduced under the condition of the determined removal rate, and the investment cost, the operation cost and the engineering land occupation of water treatment are reduced.

The invention relates to a production method of a quenched and tempered high-strength Q890E super-thick steel plate. The process steps are as follows: pretreatment of molten iron, steel-making by a converter, secondary refining, continuous casting (dynamic soft reduction and electromagnetic stirring), heating, rolling, pre-straightening, online quenching, offline quenching, tempering, finishing, performance testing and ultrasonic flaw detection. Steel comprises the following chemical components in percentage by weight: not more than 0.16% of C, 0.20-0.40% of Si, 1.30-1.40% of Mn, not more than 0.015% of P, not more than 0.003% of S, 0.03-0.05% of Als, not more than 0.10% of Nb+V+Ti, not more than 1.0% of Cu+Ni, 0.30-0.50% of Cr, 0.45-0.70% of Mo, not more than 0.0025% of B and the balance of Fe and inevitable impurities. The CEV (carbon equivalent) is controlled to be not more than 0.60, and the CEV is calculated according to the following formula: CEV=C+Mn / 6+(Cr+Mo+V) / 5+(Ni+Cu) / 15. The produced high-performance 100-120mm quenched and tempered high-strength Q890E super-thick steel plate can meet the needs for manufacturing heavy machinery in mines, ports and the like.

The invention relates to a dynamic multistage anoxic / aerobic sewage treatment method. The method comprises steps of: installing an aeration apparatus at bottom of an aeration tank; establishing a dynamic multistage anoxic / aerobic sewage treatment process model; determining an oxygen supply energy consumption performance function and constrained conditions of the dynamic multistage anoxic / aerobic sewage treatment process; dynamically determining two technological parameters of area distribution for anoxic zone and aerobic zone, and an operation period of the dynamic multistage anoxic / aerobic process, based on the above dynamic multistage anoxic / aerobic sewage treatment process model and the oxygen supply energy consumption performance function; and forming a configuration containing a plurality of anoxic zones and aerobic zones in the aeration tank by adjusting aeration rate of the aeration apparatus. The method of the invention can raise ammonia nitrogen removal capability in the sewage treatment process and reduce energy consumption of the sewage treatment process on the premise of guaranteeing stable and standard reached water outlet.

The invention relates to a production method of a quenched and tempered high-strength Q690E super-thick steel plate. The process steps are as follows: pretreatment of molten iron, steel-making by a converter, secondary refining, continuous casting (dynamic soft reduction and electromagnetic stirring), heating, rolling, pre-straightening, online quenching, offline quenching, tempering, finishing, performance testing and ultrasonic flaw detection. Steel comprises the following chemical components in percentage by weight: not more than 0.14% of C, 0.20-0.40% of Si, 1.00-1.20% of Mn, not more than 0.015% of P, not more than 0.003% of S, 0.03-0.05% of Als, not more than 0.10% of Nb+V+Ti, not more than 1.0% of Cu+Ni, 0.40-0.60% of Cr, 0.45-0.70% of Mo, not more than 0.0025% of B and the balance of Fe and inevitable impurities. The CEV (carbon equivalent) is controlled to be not more than 0.57, and the CEV is calculated according to the following formula: CEV=C+Mn / 6+(Cr+Mo+V) / 5+(Ni+Cu) / 15. The produced high-performance 100-120mm quenched and tempered high-strength Q690E super-thick steel plate can meet the needs for manufacturing heavy machinery in mines, ports and the like.