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202results about How to "Curb rise" patented technology

Combined remediation method for deteriorated grasslands and special grassland operating machine

The invention belongs to the technical field of the mechanized remediation of grasslands, and relates to a combined remediation method for deteriorated grasslands and a special grassland operating machine. The method comprises the following steps of: cutting roots of grass on the grasslands to be remediated, and loosening soil underground and forming seed furrows and fertilizer furrows in the soil along cutting joints; sowing and fertilizing alternately, and applying seeds and fertilizers into the corresponding furrows; and compacting the furrows. The special grassland operating machine comprises a cutting assembly, a vibratory soil loosening and furrowing assembly, a seed and fertilizing applying assembly, a compaction assembly and a depth limit assembly. By the combined remediation method and the special grassland operating machine, the root cutting, vibratory soil loosening and furrowing, sowing, fertilizer application and compaction are combined, and multiple remediation modes are combined, so the combined remediation method and the special grassland operating machine are suitable for the sowing for fertilizer application and fertilizing for resowing in the process of remediating the deteriorated grasslands with high compactness and are also applicable to farmlands with poor soil texture, and can better remediate grasslands deteriorated naturally or due to man factor.
Owner:CHINA AGRI UNIV

Method for remedying organism contaminated field by using bidirectional stirring injection method

The invention discloses a method for remedying an organism contaminated field by using a bidirectional stirring injection method. The method comprises the following steps: (1) flattening the contaminated field; (2) performing shallow layer ground hardening; (3) staking out in survey; (4) locating bidirectional stirring equipment in place; (5) moving a drilling rod of the bidirectional stirring equipment; (6) performing pre-stirring drilling; (7) drilling a drill rod, injecting a medicine and stirring bidirectionally, namely, injecting the medicine through an inner tube of a conveying pipeline, injecting a mixed solution of a catalyst and a buffer agent from a pipeline between the inner tube and the outer tube of the conveying pipeline, and mixing and stirring the medicine, the catalyst, the buffer agent and soil at the bottom of the conveying pipeline; (8) lifting up the drill rod through opposite stirring; and (9) moving the drill rod to a next pile site, and repeating the step (5) to (8) until the soil in all pile sites is remedied. By adopting the method, the loss of ground mixed medicines can be reduced, the reaction velocity and the reaction time can be effectively controlled, the problem that grout spills out and turns up from the ground surface can be effectively solved, and the remediation efficiency can be improved.
Owner:SOUTHEAST UNIV +2

Direct-current overvoltage current limiting control method of flexible HVDC convertor station

The invention provides a direct-current overvoltage current limiting control method of a flexible HVDC convertor station. The method can solve the problems that when alternating-current side grid faults of a flexible HVDC system receiving end convertor station or direct-current monopole disconnection faults of a sending end convertor station happen, power output of the sending end convertor station is limited so that direct-current bus overvoltage is caused, and when the voltage exceeds a protection setting value, a flexible HVDC system is locked and shut down, and the method can be used for quickly lowering the absorbed active power value of the sending end convertor station from an alternating-current power grid and restraining direct-current circuit voltage rise. When the method is applied to flexible HVDC system control, and power grid faults cause the problems that the convertor station power transmitting capacity is limited and direct-current voltage quickly rises, the absorbed active power of the sending end convertor station from the alternating-current power grid is lowered, direct-current voltage rise is restrained, and the problem that the flexible HVDC system is locked and shut down due to the fact that the voltage exceeds the protection setting value is avoided.
Owner:ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +2

Pesticide application method for improving peanut yield

The invention discloses a pesticide application method for improving peanut yield. The method comprises the following steps: (1) preparing pesticides; (2) uniformly mixing a pesticide A, a pesticide B and water based on a weight ratio of (52-58):(245-255):(72,000-78,000), and spraying the pesticides to leaf surfaces for the first time in the initial bloom stage of peanuts; (3) uniformly mixing the pesticide A, the pesticide B, a pesticide C and water based on the weight ratio of (53-57):(248-252):(18-22):(12,000-18,000), and spraying the pesticides to the leaf surfaces for the second time in a pegging stage of the peanuts; and (4) uniformly mixing the pesticide A, the pesticide B and the water based on the weight ratio of (54-56):(24-26):(13,000-17,000), spraying the pesticide to the leaf surface for the third time 15 to 20 days before the peanuts are harvested. In the method, multiple pesticide groups are adopted in the whole peanut growing period, and can be crossly and repeatedly used, so that various diseases of the peanuts can be effectively prevented and controlled, trace elements required in each growing stage of the peanuts can be fulfilled, the peanuts have more fruits with plump grains, and premature decay of the peanuts in the later stage can be effectively prevented. Furthermore, the vigorous growth can be effectively controlled, the fruit setting percentage of the peanuts can be improved, and the yield is improved by 40 percent.
Owner:孙看长
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