677results about How to "Efficient governance" patented technology

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 organic recycling agriculture production system with high efficiency, which uses food obtained from planted crops for feeding livestock, manure produced by which is fermented so as to produce biogas, biogas residue and biogas slurry, wherein, the biogas can be used as clean energy, while the biogas residue and biogas slurry are applied to cultivated lands or grass lands; the planted forage and crop stalks can be used for raising cattle or earthworm after grinded together with cattle manure; the earthworm can be extracted to produce plant growth enhancer, protein feed and biologic products; the earthworm manure can be used as highly effective organic fertilizer to be applied to farm lands or grasslands. The organic recycling agriculture production system of the invention abides by the theory of agriculture circular economy, utilizes nature resource fully and reasonably, promotes resource regeneration, forms virtuous circle of multi-grade utilization of material and energy, and thus is a modern agriculture technique with high quality, high yielding, high efficiency, low consumption and environment protection as well.

The invention relates to a method for extracting gas from a coal seam roof complex branched well, which comprises the following steps of: selecting a coal storage layer with the gas content larger than 8m<3>/t; determining the machine tunnel and the tail tunnel positions excavated by a working surface to be prepared, as the position of a horizontal well section of a complex branched well; confirming the layer position in which a fissure zone generated due to coal mining is located; respectively distributing the horizontal well section above a machine tunnel and a tail tunnel; confirming the positions of a well opening and a deflection point and realizing the angle gain of a large-curvature radius; by adopting a three-opening structure on a well body structure and adopting naked-eye structures for both the horizontal well and the branched wells, constructing a horizontal well section in a selected rock stratum; constructing the branched wells at both sides of the horizontal well section; constructing a downward branched well on the horizontal well section and drilling through the coal storage layer; installing extracting equipment for extracting gas; carrying out negative pressure extraction in the medium and later extracting phases for realizing one well with multiple purposes; and inspecting effects. The method is favorable for reducing the gas content, creating condition for safely and efficiently carrying out coal tunnel excavation and coal mining and really realizing one well with multiple purposes at the coal mining phase.

The invention provides a method for automatically recycling manganese ions in electrolytic manganese production tail end wastewater, which comprises the following steps of: pretreating stabilized production wastewater and carrying out ion exchange with cation exchange resin; adsorbing till the cation exchange resin is saturated and then adopting H2SO4 with the concentration of 0.5-1.5mol/L as a regenerant; and carrying out desorbing regeneration on the ion exchange resin adsorbed with Mn<2+>. The regenerated regenerating liquid forms MnSO4 with high concentration and meets the requirement of being recycled to the liquid preparation working section of electrolytic manganese production, and regenerating liquid with low concentration is recycled for regenerating operation in next batch. By utilizing the method, after the electrolytic manganese production tail end wastewater is processed, the discharge water is colorless and transparent and the manganese ion concentration approaches zero and is far lower than a discharge threshold value specified by the nation. Meanwhile, manganese ions in the wastewater can be separated and recycled, thereby realizing effective control of the wastewater and recycling of resources and having obvious environmental, economic and social benefits.

The invention relates to a method for determining an optimal dangerous sliding surface of a push-type landslide and an optimal pile position of an anti-slide pile, and belongs to the technical field of landslide stability evaluation and prevention. The method comprises the following steps: 1, carrying out pretreatment; performing exploration and determination of basic physical and mechanical parameters of the push type landslide slope body; determining a pushing type landslide slope body, strip block downward sliding force and residual downward sliding force, determining a landslide active sliding area, an extrusion area and a stable area, determining a most dangerous sliding surface formed by a pushing type landslide shear-off opening, determining critical residual downward sliding thrustof a landslide local damage position and determining an optimal landslide anti-sliding pile position. The method has the beneficial effects that according to the ultimate balance condition of the landslide slope body, the striping-is adopted; Sequentially a most dangerous sliding surface formed by the landslide shear-off opening, a landslide local damage shear-off opening mechanical criterion anda compensation residual sliding thrust value of the anti-slide pile are determined by using a residual sliding force analysis method; The optimal anti-slide pile position for push type landslide treatment is determined, and the purpose of scientific and effective treatment of the landslide is achieved.

The invention belongs to the technical field of environmental protection and discloses a treatment method for paint spraying waste gas. The method is characterized in that paint spraying waste gas is treated through a circulating concentration manner, namely after large-flow and low-concentration gas discharged from a spraying chamber is treated by paint mist, most of the gas is circulated to the spraying chamber, and a small amount of the gas is discharged after being purified; and as paint spraying is performed, the concentration of gas in the spraying chamber increases gradually, and then large-flow gas is concentrated into small-flow gas to be purified, so that the purification efficiency, the stability and the security of waste gas can be improved advantageously, and the investment and running cost of treatment equipment can be reduced at the same time. The method has the advantages that the discharge flow rate of waste gas can be reduced, and paint spraying waste gas can be treated effectively to meet the national requirements of discharge of 'three wastes'.

The invention discloses a drilling and sealing method for gas drainage from a coal seam, and aims to ensure simple process, easy operation, high sealing depth and good sealing and insulating effect. The method comprises the following steps of: drilling in the coal seam with a drill according to drill-hole arrangement parameters of the coal seam; allowing a gas drainage tube to pass through a cylindrical cloth bag; fastening sticking buttons and snapping a snap ring at the two ends of the cylindrical cloth bag so as to fixedly connect the cylindrical cloth bag and the gas drainage tube together; unzipping the cylindrical cloth bag and uniformly and rapidly packaging a filler with expansion property into the cylindrical cloth bag; zipping the bag and rapidly feeding the cylindrical cloth bag in which the filler is packaged and the gas drainage tube together into the drill hole; automatically and completely blocking the drill hole after the filler in the cylindrical cloth bag is expanded; and connecting the gas drainage tube to a gas drainage pump for gas drainage.

The invention provides TiO2/RGO aerogel, and a preparation method and application of the TiO2/RGO aerogel, belonging to the technical fields of material preparation and environment purification. By adopting L-Cysteine as a reducing agent and a crosslinking agent, the TiO2/RGO aerogel is prepared by loading TiO2 onto ROG aerogel by a simple one-step hydrothermal method for the first time, and the TiO2/RGO aerogel has a macrostructure of which the diameter is 2.0cm and the height is 3.5mm. The prepared aerogel has high specific surface area, can efficiently adsorb oily wastewater and treat the oily wastewater in a photocatalysis manner, and is easy to separate and recycle. The preparation method is simple, is beneficial to large-scale industrial production, and has significant economic benefits and social benefits, and raw materials are cheap and easily available.

The invention discloses a hybrid active power filter and a DC side voltage control method thereof. The hybrid active power filter comprises an active power filter, a passive power filter, a harmonic wave current injection branch and a PWM rectifier. The output of the active power filter is filtered by an output filter and then is connected with a primary side of an isolation transformer; the secondary side of the isolation transformer is partially connected with the fundamental wave series resonant circuit of the resonant wave current injection branch in parallel, then is connected with the injection capacitor of the resonant wave current injection branch in series and then combined in the grid with the passive power filter; the PWM rectifier supplies power for the DC side of the active power filter. The hybrid active power filter of the invention not only effectively controls harmonic wave, but also carries out partial reactive power static compensation with certain capacity by the passive power filter. The three-phase voltage type PWM rectifier is applied to control the DC side voltage, thus preferably maintaining the constant of the DC side voltage.

The invention relates to a method for gas extraction through a bedding directional long drill hole traversing working face in a broken and soft coal seam. According to the method, through an air screwmotor directional drilling technology, the bedding gas extraction long drill hole is constructed in a tunneled roadway on one side of the working face of the coal seam, and the drill holes penetratesthrough a to-be-tunneled roadway on the other side of the working face to the position, within the control range of 15-20 m, of the outer side of the roadway; and after the drill hole is completed, adrill tool is lifted up, an open-close type guiding drill bit and a drill rod with a large through hole are put down, then a hole protection screen pipe is put down through the center of the drill rod, then the drill rod is lifted up, the screen pipe stays in the hole, and then a gas extraction pipeline is connected for gas pre-extraction. An air screw motor directional drilling method is adoptedin the gas treatment technology so that the drilling depth of bedding extraction of the broken and soft coal seam and the coal seam drilling-encounter rate can be greatly increased, invalid footagesare reduced in quantity, meanwhile the drill hole coverage range is ensured, the purpose of gas pre-extraction outburst elimination of the stope face and the to-be-tunneled roadway is achieved, and safe tunneling of the coal seam roadway and safe extraction of coal extraction work face are ensured.

The invention discloses a comprehensive treatment process of desulfuration waste water. The process steps include: (1) collecting and buffering of waste water; (2) lime treatment by means of a chemical method; (3) heavy metal removing; (4) coagulation treatment of suspended matter; (5) sediment treating of the suspended matter; and (6) dehydrating treatment of sludge. The comprehensive treatment process can not only treat various pollution factors in the waste water but also reduce energy consumption.

The invention discloses a coking wastewater treating process with zero discharge. The coking wastewater treating process with zero discharge comprises the following steps: carrying out biochemical treatment, adsorbing by activated carbon, softening crystals, filtering by an ultrafiltration membrane, filtering by a reverse osmosis membrane, carrying out spray evaporation and the like. The coking wastewater treating process with zero discharge is simple in process, convenient in operation and management, high in automation degree and low in running cost, is capable of not generating secondary pollution, effectively treating coking wastewater, basically realizing wastewater zero discharge, completely eliminating environment disruption caused by organic matters, ammonia nitrogen, salts and the like in the wastewater and reusing all the wastewater with high quality, can be used as a wastewater treating full flow process of a newly-built coking enterprise and can also be abutted to the wastewater treating process of the traditional coking enterprise.

The invention discloses a method for planting red dates in the gobi field of an arid region. The gobi field of the arid region is used as a planted land, wild jujubes and kashgar round jujubes are used as a stock, annual branches of varieties such as gray jujubes, jun jujubes, Kumul jujubes, Jinchang No.1 jujubes and Zanxin jujubes are used as scions for grafting, the seedlings are cultivated, and a red date base is built. According to the method for planting red dates in the gobi field of arid region, the broad gobi field resources are fully utilized, water is saved, the red date industry can be developed in the gobi field of the arid region in a large-scale mode; meanwhile, the ecological environment can be effectively controlled, wastelands can become featured fruit bases, material wealth can be obtained, and the sustainable scientific development in the arid region can be supported.

The invention relates to a 1,4-butanediol chemical waste water treatment technology, and belongs to the technical field of environment engineering. The 1,4-butanediol chemical waste water treatment technology comprises that high-density 1,4-butanediol production waste water is fed into a homogenization pond; the high-density 1,4-butanediol production waste water is fed into a two-stage aerobic reaction pond through an elevator pump; the high-density 1,4-butanediol production waste water treated by an aerobic reaction flows automatically into a settling pond; after muddy water is separated from the high-density 1,4-butanediol production waste water in the settling pond, the high-density 1,4-butanediol production waste water is discharged; and a part of the muddy water flows back to the two-stage aerobic reaction pond and the rest of the muddy water is dehydrated and then discharged, wherein a first section of the two-stage aerobic reaction pond is added with a biological carrier filling material and a second section of the two-stage aerobic reaction pond does not need a carrier filling material and is added only with sludge. The 1,4-butanediol chemical waste water treatment technology has the advantages of device work stabilization, high efficiency, stable quality of yielding water, convenience of automatic control, management and operation, and low operating cost.

Urease-producing microorganisms of Sporosarcina antarctica UR53, Sporosarcina koreensis UR47, Sporosarcina sp. UR31 and Bacillus lentus UR41 were preserved in China General Microbiological Culture Collection Center (CGMCC) on March 16, 2012 with the preservation numbers of CGMCC NO.5916, CGMCC NO.5915, CGMCC NO.5913 and CGMCC NO.5914, respectively. The method for solidifying heavy metals in the foundation by using the urease-producing microorganisms comprises the steps of: carrying out fermentation culture on the four microorganisms and microorganisms of Sporosarcina pasteuril and Terrabacter tumescens in a fermentation culture medium to obtain microorganism liquid, adding reaction liquid urea to the microorganism liquid, and then adding to the solution containing heavy metals to form a mixed solution, so that microorganism-heavy metal flocculates are formed in the mixed solution and then water-insoluble heavy metal carbonates are further formed. The method for solidifying the heavy metals in the foundation by using the microorganisms has the advantages of short solidifying time, good effect, low cost and no secondary pollution to environment.

The invention discloses a plant-machine compound type sand barrier design method, namely a method for promoting quick ecological restoration of a moving dune. The method mainly consists of technologies of laying a line transect, laying a grass grid sand barrier, planting a plant living sand barrier, directly seeding the plant living sand barrier and the like. The design principle is that the grass grid sand barrier is laid first to fix drift sand, meanwhile the plant living sand barrier is planted and directly seeded, the plant sand barrier can continue to play a windproof and sand-stabilizing function after a mechanical sand barrier loses efficacy, and the comprehensive sand stabilization effect is good. The method solves the difficult problems in the past that the governing difficulty of the tall moving dune in a high and cold area is large, the plant cover is hard to recover, and the drift sand is hard to stabilize, explores a new ecological restoration mode for preventing serious sandy desertification, and is a quick ecological restoration method for the moving dune in the high and cold area.

The invention discloses a method for preparing polymeric aluminum ferric sulfate by using aluminium ore washing gangue, which is characterized in that washing gangue or/and brasses of a karst accumulated aluminium ore or other aluminium ores is or are used for preparing high-iron pyritic residue iron powder which reacts with sulfuric acid to generate aluminum sulfate and ferric sulfate water solutions, and then an alkalizer is added for polymerizing to produce the polymeric aluminum ferric sulfate. Meanwhile, the gangue has thinnest granularity, wherein the content of fine silt with the granularity of -10 micrometers accounts for 80 percent, and the fine silt is the optimal raw material for producing the polymeric aluminum ferric sulfate, and has the advantages of high reaction ratio and good product quality. The invention has the advantages of being capable of reasonably and effectively utilizing aluminium ore resources, effectively controlling the aluminium ore washing gangue from a pollution source, protecting the environment, realizing the harmony of human beings and the environment, lowering the production cost of the polymeric aluminum ferric sulfate and realizing high-efficiency recycling economy.

The provided urease-producing microorganisms comprise: Sporosarcina antarctica UR53, Sporosarcina koreensis UR47, Sporosarcina sp. UR31, and Bacillus lentus UR41, wherein all the above microorganisms have been deposited with the China General Microbiological Culture Collection Center (CGMCC) on March 16, 2012, and assigned respectively the accession numbers: CGMCC NO.5916, CGMCC NO.5915, CGMCC NO.5914, and CGMCC NO.5913. The provided method for solidifying heavy metals in subgrade using the urease-producing microorganisms comprises steps of: putting the above four microorganisms, Sporosarcina pasteurii and Terrabacter tumescens in a fermentation medium to obtain a bacterial solution by fermenting; adding a urea reaction solution into the bacterial solution; and adding the solution of the above step into a solution containing heavy metals to form a mixed solution, so that floccules of microorganism-heavy-metal are formed in the mixed solution and water-insoluble heavy-metal-carbonates are formed further. The method for solidifying heavy metals in subgrade using the microorganisms provided by the invention has the advantages of short solidifying time, good effect, low cost, and no secondary pollution to environment.

The present invention is catalytic oxidation process for treating PVA waste water. The process includes the following steps: pre-treating waste water from PVA industry and subsequent catalytic oxidation with Fenton reagent through throwing FeSO4 solution and H2O2 in the weight ratio of 18-22 to 1. The process can eliminate 85.1 % of CODCr in PVA waste water and make PVA waste water reach draining standard. The oxidation reaction may be completed at normal temperature in high speed, and the Fenton reagent is environment friendly.

The invention discloses a metal mining area contaminated soil remediation agent capable of improving plant growth. The remediation agent is prepared from the following six ingredients of mineral humic acid, attapulgite, coal ash, polyglutamic acid, ground phosphate rock and microorganism organic fertilizer. When the remediation agent is utilized to process contaminated soil, the remediation agent and the mining area contaminated soil are fully mixed according to the weight ratio of (1 to 2) : 1000, then appropriate water is added to wet, and plants are cultivated after the remediation agent and the mining area contaminated soil are fully mixed. The soil remediation agent can fix heavy metal ions in soil through heavy metal adsorption property of the mining humic acid, the attapulgite and the coal ash and a chelating effect of the polyglutamic acid and can prevent the heavy metal ions from migrating through leaching and runoff. On one hand, the humic acid, the ground phosphate rock and the microorganism organic fertilizer are utilized to regulate absorption of plants to soil heavy metal to improve moisture and fertilizer retention property of soil. According to the metal mining area contaminated soil remediation agent disclosed by the invention, a lot of mineral materials are chosen and matched, so that product cost is low; the metal mining area contaminated soil remediation agent can improve survival, growth and development of mining area plants in a dry condition and especially is suitable for quick greening and restoring engineering of high-concentration heavy metal polluted soil with an obvious toxic effect on plants.

The invention discloses a comprehensive utilization method of coal gangue. The comprehensive utilization method of the coal gangue comprises the following steps: separating alumina-silica of coal gangue by adopting a baking, crushing, sulfuric acid leaching and centrifugal separation method, thereby obtaining an aluminum salt Al2(SO4)3 solution and filter residues (SiO2); adding slaked lime (Ca(OH)2) into the filter residues, adding caustic soda NaOH according to the molar ratio of Ca/Na of 1 to (1.0-2.0), and carrying out hydrothermal autoclaved reaction at 160-180 DEG C for 16-18 hours by adopting a hydrothermal autoclaved method so as to synthesize a tobermorite sewage treatment adsorption material with a good crystallization state; compounding sodium hydrogen fluoride NaHF2 formed by sodium fluoride NaF and hydrofluoric acid HF with the leached supernate Al2(SO4)3 solution, and carrying out full reaction under stirring for 1-1.5 hours so as to synthesize cryolite. The invention provides a solution for preparing the tobermorite sewage adsorption material by utilizing silicon dioxide in coal gangue and preparing cryolite by utilizing the alumina component; and the obtained materials have a favorable application prospect, and the aim of preparing materials with high additional value by comprehensively utilizing coal gangue is achieved.