30results about How to "Prevent water erosion" patented technology

A scalable, modular water filtration and re-capture system is disclosed, such as for use as a high performance bioswale, or other purposes. The system includes a filter container with a removable cartridge that contains a filter media soil and planted vegetation, which may be for example one or more hyperaccumulators. The filter container is stacked together with a cistern container and in fluid communication therebetween to form a stacked container pair as a water filter and capture module. This allows for efficient servicing and removability of the filter cartridge, such as in bioswale, below ground, or above ground configurations. Water inflows and outflows may be circulated for varieties of reclamation uses, or treated water may simply be stored or conveyed into the ground. Multiple such modules may be secured together in custom scalable configurations to meet various needs and intended uses for water volumes, available space or terrain, or specific water treatment needs. In some embodiments, a single individual can replace the cartridges as needed.

A deep soil loosener with laterally bent blades is composed of machine frame, laterally bent deep loosening blades with 40-50 deg of inclination and parabolic shape, ground wheels, and grass cutting disks. One grass cutting disk is matched with one latterally bent deep loosening blade and is arranged in the front of said loosensing blade for preventing the straw or grass from winding on the loosening blade. Its advantages are low interference to cultivated soil layer and smooth ground surface.

The invention provides a chemical curing agent as well as a preparation method and application thereof and belongs to the field of curing agents. The chemical curing agent is prepared from a first component and a second component, wherein the first component is mainly prepared from water, polyvinyl alcohol, polyacrylamide and acrylate; the second component is a solution containing sodium silicate with the percentage concentration of 2 to 5 percent. The preparation method of the curing agent comprises the following steps: mixing the polyvinyl alcohol, the polyacrylamide and the acrylate with water, and carrying out heating reaction at the temperature of 60 to 80 DEG C for 30 to 120 minutes to obtain the first component; preparing the sodium silicate solution with the mass concentration of 2 to 5 percent, thus obtaining the second component. The chemical curing agent has bionic performance, i.e., the chemical curing agent can form chemical crust on the sand surface; the chemical crust is similar to biological crust, and can be used for long-acting immobilized governance on sand grains, so that the weather-proof capability and the water erosion resistance of desert are improved.

A method for immobilizing liquid radioactive waste is provided, the method having the steps of mixing waste with polymer to form a non-liquid waste; contacting the non-liquid waste with a solidifying agent to create a mixture, heating the mixture to cause the polymer, waste, and filler to irreversibly bind in a solid phase, and compressing the solid phase into a monolith. The invention also provides a method for immobilizing liquid radioactive waste containing tritium, the method having the steps of mixing liquid waste with polymer to convert the liquid waste to a non-liquid waste, contacting the non-liquid waste with a solidifying agent to create a mixture, heating the mixture to form homogeneous, chemically stable solid phase, and compressing the chemically stable solid phase into a final waste form, wherein the polymer comprises approximately a 9:1 weight ratio mixture of styrene block co-polymers and cross linked co-polymers of acrylamides.

The invention relates to the field of laser machining and discloses a laser strengthening process of a blade of a vacuum pump compressor. The laser strengthening process comprises the specific steps: cleaning the surface of the blade with cleaning water; uniformly spraying a first absorption coating on the blade; spraying a second absorption coating outside the first absorption coating through a spraying gun; spraying a constraining layer outside the blade; aligning a laser device with the blade and carrying out laser impact strengthening in a direction from the inner side of the blade to the outer side of the blade. According to the laser strengthening process, the second absorption coating is arranged so that the blade has relatively strong hardness in the direction from the inner side of the blade to the outer side of the blade, and furthermore, a condition that the blade is broken in a working process is effectively prevented; meanwhile, water erosion on the surface of the blade is avoided; gasification difference between the absorption coatings with different thicknesses is effectively prevented through an auxiliary heating manner; an operation process is simplified and the efficiency of laser impact hardening is improved.

The present invention relates to the technical field of crop cultivation, and in particular to a method of plowing land under the condition of full coverage of corn stalks on the surface, comprising the following steps: working in stages and layers, directly plowing the plow layer and plow bottom layer in the autumn of the first year, Change the distribution state of the straw; reorganize the plowing layer within the sowing depth range before sowing in the spring of the second year to build a composite seed bed. The invention proposes a plowing method under the condition that the corn stalks are fully covered on the surface, which is beneficial to soil water and moisture retention, increases the temperature of the seed bed, and prolongs the growing period of the crops.

The invention discloses a reflection type sheet laser amplifier of a ridge structure. The reflection type sheet laser amplifier of the ridge structure comprises a window, ridge structure sheet gain media, diode laser arrays, cushion blocks, a cooling and radiating device and a reflector, wherein m pairs of ridge structure sheet gain media are arranged on the inner walls of two cooling and radiating slabs of the cooling and radiating device in a vertically staggered mode, the two cooling and radiating slabs of the cooling and radiating device are vertically parallel to each other, m is a positive integer, the window is arranged at one ends of the cooling and radiating slabs, the reflector is arranged at the other ends of the cooling and radiating slabs, the plane where the window is located is parallel to the plane where the reflector is located, each ridge structure sheet gain medium is pumped by a corresponding diode laser array. According to the reflection type sheet laser amplifier of the ridge structure, two-pass four-time amplification of injected pulses can be achieved by the ridge structure sheet gain media without coating, low incidence loss of the surfaces of the gain media is guaranteed, and a series of problems caused by coating of the surfaces of the gain media are avoided. The reflection type sheet laser amplifier of the ridge structure has the advantages that quality of output light beams is good, and efficiency is high.

A method for eliminating the Cd pollution of soil by use of solanum features that the black nightshade is planted in the Cd polluted soil for enriching the Cd pollutant and the mature black-nightshade is removed, so eliminating the pollution of soil.

The invention discloses a temperature control system and method for a steam turbine exhaust hood. The temperature control system is characterized in that when a steam turbine is in ultralow-load operation, condensate is used as the desuperheating spraying water source, and a spraying desuperheating master controller regulates the open degree of a desuperheating spraying main regulating valve according to temperature measured by a steam exhaust temperature detecting device to spray cooling water into a low-pressure-exhaust-hood inlet channel from a desuperheating spraying device so as to lowersteam exhaust temperature. Compared with a traditional low-pressure-exhaust-hood spraying desuperheating system, the temperature control system has the advantages that closed-loop control of desuperheating spraying quantity, last state blade root water erosion, caused by desuperheating water flowing back to the last stage of a low-pressure exhaust hood, of a traditional spraying desuperheating device is avoided, and the temperature of the low-pressure exhaust hood is lowered while the reliability and safety of the steam turbine in ultralow-load operation are increased.