49results about How to "Short governance time" patented technology

The invention discloses a repairing method for heavy metal polluted soil. Aiming at heavy metal polluted lands with different pollution degrees, the concentration or the matching ratio of an organic cured solution is controlled so as to control the transferring of heavy metal elements in soil and weaken the corrosion to the soil by heavy meals; particularly, organic nutritional substances are added into the soil so as to ensure the effective supply of a plant growth nutrient solution in ecological repairing; the survival rate of plants is obviously increased and the content of organic matters of the soil is increased.

The invention discloses a bionic removal method for wastewater containing low-concentration organic amine. Under inspiration of the self-purification function of a water body, the method realizes thepurification of the water body under the conditions of being close to the natural water body environment and being assisted by illumination. The method comprises the steps: adding a transition metal-containing compound into a water body containing low-concentration organic amine, and then carrying out deamination operation in an aerobic environment and under the irradiation of sunlight (or simulated sunlight). The method is characterized in that under illumination, the content of amine in the wastewater is reduced by controlling the addition amount of the transition metal-containing compound and controlling the pH value of the solution. According to the method, amine pollutants are removed in a bionic mode under the condition close to the natural water body environment. Compared with a pure biological method, the method has the advantages that the environmental compatibility advantage of the biological method is reserved, the time required for water body treatment is shortened, used reagents are economical and easy to obtain, contained species are common species in the natural water body, no harmful element is added into a system in the pollutant removal process, and the method isan environment-friendly treatment process.

The invention concerns the repairing dose to repair the soil polluted by heavy metal, which belongs to the technique field of repairing soil polluted by heavy metal. The repairing dose mainly includes: Na unit soil, haibao stone, stick stone, coal powder and microorganism germ root. Every composition' rate by weight is: Na unit soil15--40%, haipao stone 10--50%, stick stone 10--30%, coal powder 5--30%, microorganism germ root 0--40%. The repairing dose in the invention has the advantages of low cost of material, simple working equipment, good effect and no second pollution.

The invention discloses an underground construction tunnel lining water leakage comprehensive treatment method. The method comprises the steps that a water source is searched for through a geophysicalprospecting method and holes are drilled within a certain range on the two sides of a water leakage area to relieve pressure; systemic drilling and grouting are conducted in the water leakage area and the grouting sequence is implemented from the middle to the two sides of a water source area; emphasized and targeted treatment is conducted within a period of time after completion of system grouting and drilling and grouting are conducted on a water leakage point area in the remaining water leakage area; lining deformation serves as master control, and quantity pressing is combined as secondary control; the purposes of no obvious water leakage points, most of the area being the dry no-water surface and water seepage occurring to a small part of area can be achieved within a period of timeafter completion of drilling and grouting; after emphasized treatment for a period of time, supplementary reinforcement and treatment are conducted and grouting is conducted on the lining surface water leakage area; according to the standard of grouting completion, lining deformation serves as master control, and quantity pressing is combined as secondary control; after completion of grouting treatment, the lining surface starts to be cleaned, and the lining surface is restored.

The invention discloses a method for treating wastewater containing hexavalent chromium. The method comprises the following steps: crushing pyrite ores, separating the crushed pyrite ores and screening the separated pyrite ores through a 100-300-mesh screen to obtain pyrite ore powder; adding a modifying agent, namely polycarboxylic acid into the pyrite ore powder to obtain modified pyrite ore powder; adding the modified pyrite ore powder into the wastewater containing hexavalent chromium, fully stirring and reacting for 10 minutes to 2 hours to form sulfide insoluble materials of Cr2S3 and Cr3S4; standing and precipitating; recycling precipitates and enabling the treated wastewater to reach or be below the specified emission standard. The method is simple in equipment, low in cost, small in occupied area and free of secondary pollution; the removal rate of Cr<6+> reaches over 98%; the quality of the discharged water can reach or be below the specified emission standard; the great economic and social benefits can be realized.

The invention discloses an underground liquid nitrogen direct injection type fire preventing and extinguishing device. The upper end of a liquid nitrogen tank of the device is connected with a liquid inlet control valve, a buffering tank is connected with the upper end of the liquid nitrogen tank via a buffering tank nitrogen outlet control valve, an upper one-way valve, a nitrogen return pipe and a liquid nitrogen tank nitrogen inlet control valve sequentially, the lower end of the liquid nitrogen tank is connected with the lower end of the buffering tank via a liquid nitrogen tank liquid outlet control valve, a lower one-way valve, a heat-insulation tube and a buffering tank liquid inlet control valve sequentially, and the lower end of the buffering tank is connected with a drilling tube via a hopper-shaped gathering opening and a buffering tank liquid outlet control valve. By the aid of the device, fire extinguishing efficiency can be improved by 30% at least, fire district treatment time is shortened by 20% at least, the device can be dragged by a mine underground rail vehicle to reach a closed wall to movably extinguish fire, and accordingly the underground liquid nitrogen direct injection type fire preventing and extinguishing device is flexible, convenient, safe and environment-friendly, is rapid in fire extinguishment, and is particularly applicable to high-efficiently preventing and controlling coal seam spontaneous fire hazards.