744results about How to "Less one-time investment" patented technology

The invention provides a construction method for a soft rock deformation tunnel lining support dismantling-replacing arch. One-time whole section integral dismantling and replacing of a lining support is achieved. The construction method has the advantages that before dismantling and replacing, a lining which loses bearing capacity is subjected to grouting reinforcement treatment first, then a temporary cover arch is additionally arranged outside for reinforcement, and afterwards, the lining support is dismantled step by step, so that potential safety hazards caused by dismantling or removing of a temporary platform frame are avoided, and some security risks are avoided effectively. According to the construction method, the construction difficult problem of soft rock large deformation occurs during construction of a tunnel in special and complex geology is solved. Through the created novel construction method, the construction difficult problem of second lining cracking deformation needing remediation due to weak surrounding rock large deformation is solved. Through the construction method, safe, fast and economic treatment and remediation of the lining support and arch replacing construction are achieved, and the tunnel structure stability and construction safety are ensured effectively.

The invention discloses a large cross-section weak surrounding rock tunnel three-step and six-part short-distance construction method, which comprises the steps as follows: (1) annularly excavating an upper step of an upper part arc pilot tunnel, transferring excavated earthwork of the upper step to a lower step; (2) excavating a left part of a middle step about 4.5-5 meters behind the upper step, and transferring excavated earthwork to the lower step; (3) excavating a right part of the middle step about 3-4 meters behind the left part of the middle step, and transferring excavated earthwork to the lower step;(4) excavating a left part of the lower step about 6-8 meters behind the left part of the middle step or about 3-4 meters behind the right part of the middle step, and conveying excavated earthwork of the left part of the lower step out of the tunnel; (5) excavating a right part of the lower step about 3-4 meters behind the left part of the lower step, and conveying excavated earthwork of the lower step out of the tunnel; and (6) excavating the rest part of the tunnel bottom about 20-25 meters behind the right part of the lower step, excavating continuously according to the steps in a circulating and interlacing manner, and finally realizing tunnel excavating construction. The method can be used for building a large cross-section tunnel in a safe, rapid and economic manner.

The invention discloses a spatial soilless vegetable planting method. The method is characterized by comprising the following steps: a. selecting two or more raw substrate materials such as biogas residue, furnace slag, grass carbon, decomposed fermentative crushed crop straw, decomposed fermentative crushed wood shavings, decomposed fermentative sawdust, decomposed fermentative lees and decomposed fermentative spent mushroom, and mixing the selected raw substrate materials to prepare a culture substrate; b. erecting a spatial cultivation groove in the existing facility space; c. installing a drip irrigation system, d. planting vegetable crops on a suitable upper layer and a suitable lower layer of the cultivation groove; and e. cultivation management. In the method, the vegetable cultivation is realized by carrying the culture substrate in a certain frame groove to artificially make an 'artificial land' in the limited facility space, the soilless vegetable cultivation is convenient as land cultivation and needs no nutrient solution, and the organic substrate and solid fertilizers provide nutrients necessary for growth and development of the vegetables, which can be accepted by vegetable growers, can improve utilization ratio of the facility by 50-200%, reduce cost by 30-60% and increase yield by 50-100%.

The invention discloses a distributed type power supply zone branch circuit three-phase load current balance monitoring method and device and belongs to the field of power supply and distribution devices. At least one three-phase load current balance main controller is arranged, load current signals of each phase circuit in each branch loop are collected, according to the obtained load current signals of each phase circuit, the three-phase current unbalance rate or the mean value of the three-phase current unbalance rate of each branch loop is computed, and the unbalance situation of three-phase load current of each branch loop is judged. The magnitude of load current in each unit meter box of each branch loop is collected, and the phase of unit meter box load which needs to be adjusted is determined. According to the three-phase load current unbalance situation of a certain branch, a control instruction is issued to an automatic phase-changing switch in a unit meter box corresponding to the branch loop, converting of load phases is carried out, adjusting of three-phase load current balance of each branch loop on the low-voltage side of a distribution transformer is achieved, and the real balance of distribution transformer low-voltage side main loop three-phase load current is guaranteed.

The invention relates to a deep treatment process of oily wastewater, which is characterized in that an absorption system and a regeneration system are provided in the process, wherein the absorption system is formed by a series of absorption tower groups with columns in series used for realizing parallel operation, the absorption tower groups are used for alternately performing deep treatment on oily yielding water with a low concentration of 30-50 mg/L of a traditional process, the absorption operation is carried out at normal temperature, the oil content in the yielding water is controlled to be lower than 1 mg/L through the treatment of a group of the absorption towers with columns in series, and an absorbing agent is made of modified fly ash, activated carbon and an expanded graphite absorbing material; when the yielding water in a group of the absorption towers exceeds a treatment requirement, the group of the absorption towers is switched to a biological regeneration system, and other absorption tower groups are simultaneously switched to the absorption system for continuous absorption; and saturated absorption towers are used for performing in-situ regeneration on the saturated absorbing agent by utilizing degradation ability of high temperature-resistant and efficient petroleum hydrocarbon for degrading bacteria.

A preparing method for a crystallite wear-resistant ceramic ball belongs to a technical field of abrasive media, which is characterized in that: firstly preparing a superfine material adopting wet ball milling, spraying and prilling; then rolling moulding; finally the crystallite wear-resistant ceramic ball with a diameter of 0.5-50mm after drying, firing and polishing. The inventive method has lots of advantages such as little equipment, low cost, large output and easy expansion; meanwhile, the ceramic ball is high-density, wear-resistant and stable.

The invention discloses a single-phase and three-phase combined in-phase power supply and transformation device which comprises a single-phase traction transformer, a three-phase YNd11 grounding compensation transformer and a single-phase in-phase compensation device thereof; the in-phase compensation device comprises an alternating current-direct current-alternating current (AC-DC-AC) converter; the traction transformer and the compensation transformer have equal effect to a three-phase and two-phase balance transformer with the phase of secondary side voltage being vertical; when in a normal state, the traction transformer, the compensation transformer and the in-phase compensation device jointly supply power for a transaction load by a specified proportion; when the compensation transformer or the in-phase compensation device exit the operation, the traction transformer can work independently in a short time; and a backup traction transformer can replace the traction transformer to work and can work on linear voltage different from that of the traction transformer. According to the device, the electric phase at the exit of a traction transformer substation can be canceled, so that the electric energy quality requirements mainly comprising the unbalance of three-phase voltage can be met, and the optimal configuration of traction power supply resources can be realized.

The invention relates to a membrane treatment process for oilfield reinjection water, which comprises the specific steps of: firstly introducing oil-containing wastewater into a settling tank for naturally settling to remove part of large suspended solid granules and waste oil; directly introducing the settled water into a ceramic membrane ultrafiltration device for internal circulating filtration, directly using the liquid penetrating through the membrane for reinjection, introducing the circulating liquid containing large amounts of suspended solid granules and waste oil which do not penetrate through the membrane into the settling tank for continuing settlement, mixing with inflow water and introducing into the ceramic membrane ultrafiltration device for filtration again; automatically discharging pollutants when the wastewater in a circulation tank reaches a certain concentration ratio; and automatically adjusting the membrane surface flow rate of an online detection device according to the inflow water quality conditions, so as to achieve the purpose of energy conservation. The membrane treatment process provided by the invention has the advantages of simple process, low investment cost, high filtering precision, no need for the introduction of any reagents during the treatment process, no secondary pollution, etc.

The invention relates to a method for removing aldehydes in an epoxypropane reaction mixture. The method comprises carrying out primary aldehyde removal on an epoxypropane reaction mixture through an aldehyde-free resin tank so that aldehyde content is reduced and epoxypropane product purity is guaranteed, orderly removing water and unreacted propylene, feeding the materials containing epoxypropane and methanol into an epoxypropane refining tower, carrying out extraction on methanol in the middle section of the tower through desalinized water containing ethanolamine or hydrazine hydrate, simultaneously removing residual aldehyde in the epoxypropane product, separating the separated aqueous solution through a methanol tower, feeding the aqueous solution into a membrane separation device, further removing residual aldehydes and impurities, returning the methanol as circulation methanol at a penetration side to a reaction system and returning aldehyde-containing methanol at a retentate side to a collection tank. The method utilizes less devices, reduces a disposable investment, does not need hydrogen in a separation and recovery process, does not increase a safety risk, is safe and reliable in use and reduces later waste water treatment energy consumption.

The invention relates to a method for producing AZ31 magnesium alloy sheet, at 300MPa level and isotropic property, wherein the invention uses magnesium alloy electromagnetic low-temperature semi-casting method to produce blank to be uniformly annealed, milled and compressed at 200-400Deg. C into sheet band, while the compress ratio is 8-15 and the thickness of compressed sheet is 5-20mm; then cutting the compressed sheet into the sheets whose width is 10-30mm, to be heated to 300-400Deg. C; then preheating the roller of rolling machine, vertically to the former extrusion direction, to obtain the sheet whose width is not higher than 500mm and thickness is 0.3-1.0mm; via combining the extruding temperature and rolling temperature, obtaining the sheet with high plasticity or high strength; then cutting edge, coating protective film and packing. The invention has simple process, low cost, and high property, while the anti-drawing strength is 300MPa level.

The invention relates to a liquid electrode surface discharge plasma reactor which is used for water treatment and consists of a flume, a discharge electrode system and a wastewater region, wherein, the discharge electrode system is positioned at the center of the flume, wastewater exists around the insulating medium tube of the discharge electrode system, the discharge electrode system is connected with the high pressure terminal of an alternating current high voltage source, the wastewater is taken as the liquid electrode which is connected with the low pressure terminal of the alternating current high voltage source, or the liquid electrode and the low pressure terminal of the alternating current high voltage source are simultaneously connected with ground wires, and aeration gas enters from the upper end of the insulating medium tube of the discharge electrode system, is ejected out from an aeration head at the lower end and then flows into the wastewater. When electricity is supplied by power, surface discharge plasma is produced on the inner wall of the medium tube, active materials are generated when the aeration gas passes through, and the active materials degrade pollutants in water and then treat the water. The liquid electrode surface discharge plasma reactor has the advantages of simple structure, high water treatment effect, low initial investment and small operation cost.

The invention discloses a construction method for one-time formation of a concrete pool wall. The method includes the steps of erection of a pool wall reinforced frame, mounting of pool wall forms, mounting of a support system, and casting of the concrete pool wall. The method has the advantages that the problems of large pool wall height and large form side pressure are solved by the use of the solid side forms and a reinforcing support system; the pool wall forms are erected to the top once, and the appearance quality of the pool wall is easily guaranteed; pool concrete is cast once, structure integrity is good, and the potential water leakage problem of the pool wall caused by reservation of multiple horizontal construction joints; construction process is greatly quickened, construction period is shortened, labor cost and materials cost are saved, and engineering cost is lowered; the method is especially applicable to construction of concrete pool walls 9m in height and 300mm-1100mm in thickness.

The invention discloses a system for remotely monitoring and controlling an internet of things on the basis of a GPRS (General Packet Radio Service) network, relating to a monitoring system. A center server with coexistence of two modes such as B/S and C/S is adopted for carrying out data conversion with monitoring terminal equipment and a monitoring center client side by a TCP/IP (Transmission Control Protocol/Internet Protocol) mode so as to realize distributed remote monitoring and controlling. In the system, the operation does not need to create a local area network by self, so that the network creating cost is saved and the reliability is high; and the equipment is general and simple, the cost is low, the one-time investment is less, the use cost is low, the installation and maintenance are convenient, and the operation is safe, no limitation can be caused by the terrain, the landform and the environment, and even no pollution can be caused. The system can be widely applicable to streetlamps, railways, gas, running water, power, environment, petroleum and machines and the like. The system has the advantages of high network access speed, advanced technology, safety, reliability, economy, reasonability, energy conservation, simpleness and convenience in maintenance and strong practicability, and conforms to the trend for development of the conservation-minded society.

The invention provides a technology for treating dilute emulsified oiliness wastewater comprising the steps of uniform aeration adjustment, one-stage pH regulation, two-stage pH regulation, coagulation, air floatation, cooling, biological contact oxidation, flocculation deposition, part sludge reflux, after the above steps, the effluent reaches the discharge standard or the recycling standard. The technology of the invention effectively overcomes the problems of weak safety, high requirement for operation running and daily management and secondary pollution and the like, furthermore has the advantages of low once investment, stable treatment effect, low production operation running cost and simple operation running.

The invention relates to a continued ironmaking device based on melting reduction of iron oxide containing carbon iron oxide balling (blocks). In the invention, the device is a continued ironmaking device based on melting reduction and can carry out continual tapping by pre-reducing furnace burden (3) through continually adding the furnace burden (3), extracting air, preheating, blasting and carrying out downstream roasting, and directly conveying the pre-reduced furnace burden (3) into a smelting-separating furnace (B) for continuous smelting-separation; a preheat area (4), a roasting area (5) and the smelting-separation areas behind the preheat area and the roasting area form a connected hearth; a combustion-supporting burner (8) and a secondary tuyere (7) are arranged also; preferably, the high-temperature coat gas generated in the smelting-separation area is subjected to secondary combustion in a pre-reduced furnace (A) for preheating and roasting the furnace burden (3); then the furnace burden (3) is discharged into the smelting-separation area for the further reduction, carburization and melting to separate the slag and iron; in the preheated area (4), the fuse passes through a bed of material to directly heat the furnace burden (3), and then the fuse enters a heat exchanging device (9) and a fuse process system; and a fan blasts the cool air below the bed into a hearth bottom (2) through the heat exchange device (9). The device has the advantages of short flow, reduced energy consumption, low carbon emission, low production cost, simple equipment, less occupied space, less investment and short building period.

The invention relates to a method for preparing a microcrystal wear-resisting zirconia ball, and belongs to the technical field of grinding mediums. The method is characterized by comprising the following steps of: preparing superfine powder raw materials first by adopting wet-process ballmilling and spray granulation; rolling for forming; and drying, sintering and polishing to prepare a microcrystal wear-resisting ceramic ball with the grain diameter between 0.5 to 50 millimeters. The method has the advantages of less used equipment, small investment, high yield, easy production expansion and the like; moreover, the ceramic ball prepared by the method has the advantages of large density, wear resistance and stable performance.

The invention discloses a method for overlaying a wear-resistant layer of a blade shroud of a turbine working blade. In the method, manual tungsten electrode argon arc welding is used, and the specific process parameters meet the requirements that: welding wires are selected from a T800 cobalt-based wear-resistant alloy welding wire which is researched according to a B50TF193 standard of AmericanGeneral Electric Company and an S-6 cobalt-based wear-resistant alloy welding wire which is researched according to an American metal society standard AMS5788; the diameters are phi 1.6mm and phi 1.2mm respectively; a mark and the diameter of a tungsten electrode are WCe20 and phi 2.0mm; the diameter of a nozzle is phi 12mm; welding current is between 20 and 25A; and the flow rate of protective gas is between 10L/min and 12L/min. By the method, the condition of incomplete penetration or over-melting of a Z-shaped gear switching part R is avoided, the problem of overheating of welding is also solved, and the occurrence probability of welding cracks is greatly reduced or avoided. The method completely meets the requirements of the wear-resistant layer in a high-temperature working state after welding.

The invention discloses a two-stage compression refrigerating system. The two-stage compression refrigerating system is easy for energy regulation and can realize switch between a high-pressure refrigerating compressor and a low-pressure refrigerating compressor so as to improve the efficiency of the refrigerating system. The air exhaust end of each refrigerating compressor is respectively connected with a first electromagnetic valve and a second electromagnetic valve, and the air suction end of each refrigerating compressor is respectively connected with a third electromagnetic valve and a fourth electromagnetic valve. After the parallel connection, all the first electromagnetic valves connected on the refrigerating compressors are connected with an inlet of a condenser. After the parallel connection, all the second electromagnetic valves connected on the refrigerating compressors are connected with an outlet at the shell side of an intercooler. After the parallel connection, all the third electromagnetic valves connected on the refrigerating compressors are connected with the outlet at the shell side of the intercooler. After the parallel connection, all the fourth electromagnetic valves connected on the refrigerating compressors are connected with an outlet of an evaporimeter. Through the opening or closing of the electromagnetic valves connected with the refrigerating compressors, the switch between the high-pressure stage and the low-pressure stage can be realized.