36results about How to "Avoid sediment" patented technology

The invention relates to an integrated belowground vault with filter catch basin, that allows the runoff water to enter into a belowground two-part vault passing through a commercially available replaceable filter before being transferred out to the sewer, Rood control system or out through a French drain consisting of a cavity below the device that is filled with drain gravel. A layer of filter cloth can optionally be placed over the drain gravel. This device will be manufactured in variety of sizes and shapes and made from several different materials. The device has the unique ability of being capable of filtering low flow water runoff while allowing high volume to pass through with the added benefit of not retaining water that can become a mosquito breeding ground.

The invention relates to substrates of semi-insulating silicon carbide used for semiconductor devices and a method for making the same. The substrates have a resistivity above 106 Ohm-cm, and preferably above 108 Ohm-cm, and most preferably above 109 Ohm-cm, and a capacitance below 5 pF / mm2 and preferably below 1 pF / mm2. The electrical properties of the substrates are controlled by a small amount of added deep level impurity, large enough in concentration to dominate the electrical behavior, but small enough to avoid structural defects. The substrates have concentrations of unintentional background impurities, including shallow donors and acceptors, purposely reduced to below 5 DEG 1016 cm-3, and preferably to below 1 DEG 1016 cm-3, and the concentration of deep level impurity is higher, and preferably at least two times higher, than the difference between the concentrations of shallow acceptors and shallow donors. The deep level impurity comprises one of selected metals from the periodic groups IB, IIB, IIIB, IVB, VB, VIB, VIIB and VIIIB. Vanadium is a preferred deep level element. In addition to controlling the resistivity and capacitance, a further advantage of the invention is an increase in electrical uniformity over the entire crystal and reduction in the densityof crystal defects.

The invention relates to an integrated belowground vault with filter catch basin, that allows the runoff water to enter into a belowground two-part vault passing through a commercially available replaceable filter before being transferred out to the sewer, flood control system or out through a French drain consisting of a cavity below the device that is filled with drain gravel. A layer of filter cloth can optionally be placed over the drain gravel. This device will be manufactured in variety of sizes and shapes and made from several different materials. The device has the unique ability of being capable of filtering low flow water runoff while allowing high volume to pass through with the added benefit of not retaining water that can become a mosquito breeding ground.

The invention discloses a normal / low-temperature chemical conversion solution for 35CrMnSi steel and a preparing method thereof. The conversion solution consists of the following components in percents by weight: 10-30% of nitric acid, 5-15% of phosphoric acid, 15-25% of zinc oxide, 1-5% of iron powder, 5-10% of a compound accelerant and the balance of water, wherein the compound accelerant is prepared from citric acid and chlorate. The preparing method comprises the following steps: (1), dissolving the zinc oxide in the nitric acid and the phosphoric acid; (2), then, adding the compound accelerant, and after fully dissolving, adding the water; and (3), adding the iron powder into a solution obtained in step (2), taking out the iron powder after curing, and regulating the pH value to 2.0 to 3.0. The normal / low-temperature chemical conversion solution for 35CrMnSi steel does not contain toxic components, the use method is simple and is easy to operate, energy consumption and production cost are low, one layer of even and dense conversion film consisting of 2-5mum flaky zinc phosphate crystals can be formed on the surface of a base body, and the corrosion resistance is great.

Apparatus for the plasma treatment of surfaces (2) with a first electrode (4) and a second electrode (7) and an alternating voltage source (6) between the first electrode (4) and the second electrode (7), and an electrical field, forming at least between the first electrode (4) and the second electrode (7), an effective area (9), which is arranged in front of the first electrode (4) and in which the surface (2) to be treated can be positioned, and the second electrode (7) is arranged closer to the effective area (9) than the first electrode (4), characterized in that at least one process gas channel (3) for at least one stream of process gas with at least one outlet (5) at the first electrode (4) is provided and the at least one outlet (5) points in the direction of the effective area (9); and the at least one stream of process gas impinges on the electrical field and the electrical field converts the at least one stream of process gas into a stream of plasma and the stream of plasma impinges on the effective area (9).

The present invention provides a spring tube type flexible micro chemical reactor. It comprises a reactor body, a thermal control device, and a gas generating device. The spring tube type flexible micro chemical reactor enhances the heat and mass transfer using the scroll spring tube, which is able to achieve accurate mixing and dynamic adjustment of the heat and mass transfer and is able to effectively solve the problems of blocking of channels by solid reactant, the poor portability of the reaction, etc.

The invention provides a concentric hoisting method for a T-shaped reinforcement cage with diaphragm walls. According to the technical scheme, a concentric hoisting device comprises a main hoisting rope and an auxiliary hoisting rope, wherein four hoisting fasteners are arranged on two sides of the main hoisting rope; the two hoisting fasteners are arranged on the left side of the main hoisting rope; the other two hoisting fasteners are arranged on the right side of the main hoisting rope; two control fasteners are arranged in the center of the main hoisting rope; the auxiliary hoisting rope is provided with a hoisting fastener; the hoisting fasteners of the main hoisting rope are hoisting ropes tied on wing walls; the control fasteners are hoisting ropes tied on an abdominal wall; the hoisting fasteners are stressed simultaneously, but the control fasteners are not stressed; and after the main hoisting rope overturns until the control fasteners are stressed, the reinforcement cage is vertical. By the technical scheme, the main hoisting rope is only provided with the two control fasteners, and the economic input is low. The concentric hoisting device is easy to operate; and after the reinforcement cage is hoisted, a cage body is vertical, so that the reinforcement cage enters a groove conveniently, walls of the groove are prevented from being scratched by the cage body, sediments on the bottom of the groove are avoided, secondary slag removal is avoided, the engineering quality is ensured, extra objects are not required to be hoisted, the hoisting device only needs to meet requirements on hoisting of the reinforcement cage, the cost is low, and the economic benefit is high.

The invention relates to an injection valve for four-stroke engine. The injection valve is capable of stopping un-injected fuels from flowing reversely towards a first fuel chamber and a fuel supply flow path with reliability. When volume of an oil injection nozzle pressure chamber can be reduced, fuels can be stably injected to injection holes.

The invention relates to an injection valve for four-stroke engine. The injection valve is capable of stopping un-injected fuels from flowing reversely towards a first fuel chamber and a fuel supply flow path with reliability. When volume of an oil injection nozzle pressure chamber can be reduced, fuels can be stably injected to injection holes.

The invention discloses a device for plasma treatment of surfaces and a method for treating surfaces with plasma. A device for plasma treatment of a surface (2) has a first electrode (4) and a second electrode (7) and an alternating voltage source ( 6), and at least the electric field formed between the first electrode (4) and the second electrode (7), the active area arranged in front of the first electrode (4) and in which the surface (2) to be treated can be located ( 9), and the second electrode (7) is arranged closer to the active area (9) than the first electrode (4), characterized in that the outlet with at least one outlet (5) arranged at the first electrode (4) At least one process gas channel (3) for at least one process gas stream, and the at least one outlet (5) is directed in the direction of the active area (9), and the at least one process gas stream impinges on an electric field and the electric field The at least one process gas stream is converted into a plasma stream and the plasma stream impinges on the active area (9).

The invention discloses a catalytic oxidation method of a desulfurizing liquid. According to the method, a SO2 absorbed desulfurizing liquid and air continuously pass through a fixed bed reactor filled with a catalyst and react in the presence of the catalyst and under a proper oxidation condition, wherein the catalyst is a supported catalyst; a carrier is titanium dioxide; and an active metal component is rare-earth oxide. By the adoption of the method, oxidation rate and oxygenation efficiency of sulfite are significantly raised. During the application of the catalyst, there is no loss of active components. Therefore, operation cost is reduced, and secondary pollution caused by loss of active components is also effectively avoided. In addition, the solid catalyst used also has advantages of high mechanical strength, wear resistance, long service life and the like. The method provided by the invention provides an effective processing method for the discharge of a wet flue gas desulfurizing liquid to reach the standard.

A grit chamber for a wastewater treatment plant. A vertical floodgate is installed on a partitioning wall and is driven in a vertical direction to be opened downwardly from a top toward a bottom. A floodgate driving motor is coupled to one end of the vertical floodgate to directly drive the vertical floodgate. An inflow amount measurement sensor functions to stepwisely measure a flow amount of wastewater which passes through a wastewater tank. A control section is connected to the floodgate driving motor and the inflow amount measurement sensor to control the floodgate driving motor in response to a measurement result of the inflow amount measurement sensor. A wastewater level is adjusted within a predetermined range through operation of the vertical floodgate to maintain a constant flow velocity of wastewater which passes through a sand sedimentation zone, thereby preventing organic material which is contained in the wastewater and is other than sand, from sedimenting.

The invention discloses a drill suitable for drilling in a silty-fine sand stratum below the underground water level, and relates to the well drilling technology in engineering investigation. The drill comprises alloy drill teeth (1), a connecting barrel (2), a conical fairing (3), a spherical overflow valve (4), a ball valve (5) and a drill barrel (6). The drill teeth (1), the connecting barrel (2) and the drill barrel (6) are sequentially connected from bottom to top to form a main body structure. The conical fairing (3) and the spherical overflow valve (4) are sequentially arranged at the top of the connecting barrel (2). The ball valve (5) is arranged in the spherical overflow valve (4). A drilling method includes the steps of (1) assembling, (2) cutting, (3) slurry collecting and (4) drill lifting. When the drill drills in the silty-fine sand stratum below the underground water level, silty-fine sand can be effectively extracted, sediment is prevented from forming at the bottom of a drill hole, the expected drilling depth is achieved, and the hole forming quality is guaranteed. Meanwhile, the drill can realize multiple times of industrial copying.