194results about How to "Protect water resources" patented technology

The invention relates to a base pit dewatering and water saving device and a construction method thereof. The middle part of the base pit of a baseboard structure is provided with a well pit; the well pit is internally and vertically provided with a no-sand tube; pebbly sand is filled between the bottom and periphery of the no-sand tube; the top of the no-sand tube is higher than the top surface of the well pit; a water pump is arranged in the no-sand tube; blinding layer concrete is poured at the top surface of the well pit which is at the periphery of the no-sand tube and the side wall of the base pit of the baseboard structure; and the top elevation of the no-sand tube is flush with the elevation of a blinding layer; a dewatering conduit is pre-buried in a base pit baseboard right above the no-sand tube, a waterproof layer is paved on the blinding layer concrete, a layer of waterproof and protective concrete is poured on the waterproof layer, and the base pit baseboards are poured above the waterproof and protective concrete and at the periphery of the dewatering conduit. The method of the invention has lower investment, saved cost and less amount of dewatering amount, thereby reducing the loss of underground water and protecting water resource; and the method can be adopted for a project in which the well point dewatering method is not ideal for dewatering or a project in which the underground water is near the base pit elevation.

The invention provides a distributed underground reservoir suitable for storing underground water in open mining areas. The distributed underground reservoir comprises a plurality of reservoir bodies located underground, recharge water pipelines and connecting pipelines. Each reservoir body comprises a reservoir bottom, a dam and reservoir fillers, and the reservoir fillers fully fill a semi-closed area enclosed by each reservoir bottom and each dam. The lower ends of the recharge water pipelines are positioned in the reservoir fillers, and the upper ends of the recharge water pipelines extend above the ground. Besides, the reservoir bodies are communicated with one another by the connecting pipelines penetrating through the dams. The invention further provides a construction method of the distributed underground reservoir. The distributed underground reservoir can contain underground water outflowing during mining, occupancy of the ground and evaporation of moisture are reduced, stored superfluous water among the reservoir bodies can be automatically distributed, and storage of water resources in other places during stripping of an open pit mine is achieved by the aid of the recharge water pipelines so that water resources are protected.

The invention relates to a coal mine large-mining-depth and next-group coal exploitation water control comprehensive treatment method. The method comprises the following steps: (1) overall-region advancing comprehensive grouting plugging treatment, namely a, ground geophysical prospecting, and b, ground exploration and advancing comprehensive grouting treatment in an overall region; (2) strip advancing grouting treatment before downhole tunneling; (3) grouting reinforcement in a mining region and advancing grouting treatment of an adjacent unmined region, namely guiding comprehensive grouting reconstruction of a seam floor by use of more than two types of geophysical prospecting in a mining surface after a stope face is dug out; (4) stoping. According to method, an existing local multipoint one-surface single treatment is replaced by an overall-region advancing water control comprehensive treatment method for a hydrogeololgy unit or mining region and a staged horizontal region unit which are relatively independently partitioned by a geologic structure, so that water burst of a mine is prevented, an obvious effect of protecting groundwater environments, water resources and other aspects is achieved, the large-mining-depth and next-group coal mine exploration safety guarantee extent can be greatly improved, and obvious environmental and social benefits are obtained.

One aspect of the present invention is a sprayable composition for coating pipe for protecting it from one or more of root intrusion or root growth when the coated pipe is placed underground. Such sprayable formulation includes a 2,6-dinitroaniline herbicide; a polymer pellet impregnated with a 2,6-dinitroanililne herbicide-sorbed colloidal clay; and a film-forming polymer. Another aspect is pipe coated with the dried residue of a coating of a 2,6-dinitroaniline herbicide; a polymer pellet impregnated with a 2,6-dinitroaniline herbicide-sorbed colloidal clay; and a film-forming polymer, wherein the coated pipe is protected from one or more of root intrusion or root growth when the coated pipe is placed underground.

The invention provides a dry ice cleaning device and a cleaning method thereof. The device comprises an air compressed system and an injection system communicated with the air compressed system, wherein the air compressed system comprises an air compressor, a high-pressure gas pipeline and a low-pressure gas pipeline; the high-pressure gas pipeline and the low-pressure gas pipeline are respectively communicated with the air compressor and converge to the injection system through independently moving; a material division mechanism and a reducing valve are arranged on the low-pressure gas pipeline; the high-pressure gas pipeline adopts a venturi spray pipe; the air compressed system is communicated with a nozzle through the venturi spray pipe; and the outlet end of the material division mechanism is communicated with the tail end of the venturi spray pipe in the air compressed system and is connected with the injection system. According to the invention, water resources can be saved, the operating cost is reduced, and simultaneously, no cleaning agent residues exist; the exhaust gas of carbon dioxide is utilized, so that the emission of greenhouse gases is reduced; and the surface of a cleaned object cannot be damaged, and a low-temperature disinfection function is achieved. At the same time, in the invention, the dry ice cleaning device for industrial use is miniaturized so as to be applied to the field of family food sanitation.

The invention discloses a treatment method for organic industrial wastewater. The method comprises the following steps: the pH of wastewater is regulated in a regulation pond; the wastewater enters an iron and carbon reaction tank to be treated, carries out Fenton reaction treatment, and then enters a neutralization sedimentation tank to be precipitated; yielding water enters an aerobic granular sludge aeration tank to be treated and then stays for a period of time, and then water is flowed out. The method can reach the treatment requirements and protect the environment, and the wastewater can be reused after treatment. The method has the obvious characteristics of cost and water resource saving, stable and reliable treatment effect, simple and easy operation, lower running cost, easy industrial application, etc.

The invention relates to a method for producing 2-subtituted-4,6-dichloropyrimidine, which comprises the following steps of: suspending 2-substitued-4,6-dihydroxypyrimidine in an aprotic polar organic solvent; introducing phosgene into the suspension during stirring in the presence of tertiary amine organic alkali at 30 to 155 DEG C for reaction for 4 to 16 hours; after the reaction is finished, removing excessive phosgene with nitrogen; cooling the reaction product, filtering the product and washing the filtrate till the filtrate is neutral; and drying the filtrate by a drying agent, reclaiming the solvent through distillation or distillation under reduced pressure, and obtaining the 2-subtituted-4,6-dichloropyrimidine. The method for synthesizing the 2-subtituted-4,6-dichloropyrimidine has the advantages that: (1), a tertiary amine catalyst is used to catalyze the reaction and accelerate the reaction; (2), in a reaction process, the phosgene is used as a substitute for phosphorus oxychloride to avoid discharging of phosphor-containing waste water, protect water resource and reduce cost; and (3), the reaction is carried out in the aprotic polar organic solvent, and the yield of the reaction is improved due to good compatibility.

The invention discloses a 3D plasma intelligent Mohole drilling and completion method. The method comprises the following steps that a drilling platform is built, drilling equipment is mounted, and drilling is started. The drilling equipment comprises a 3D printer system assembly, a pumping system for muddy water, rock debris and the like as well as mixtures thereof, an intelligent well casing lifting and fixing system, a well casing printed by a 3D printer, a manifold system assembly, a downhole hole-drilling, hole-broadening and well-cementing intelligent executor (drilling robot), a drilling platform, an intelligent control treatment center and the like. The well casing is printed by the 3D printer, the pumping system discharges mud, the rock debris and the like, the plasma drilling executor implements drilling, and underground equipment is provided with thermal insulation and cooling protection. According to the 3D plasma intelligent Mohole drilling and completion method, a first 3D printing spray-head, a second 3D printing spray-head, a blockage system spray-head, plasma liquation well cementation, spray gun well cementation, a hole broadening spray-head, a hole-drilling spray-head and a high-pressure gas spray-head work cooperatively; the intelligent well casing lifting and fixing system fixes and lifts the well casing printed by the 3D printer intelligently; and drilling can be constructed in the land and at a deep sea.

The invention provides a construction method for a well structure of a heat exchange type horizontal butt-joint geothermal well. The construction method for the well structure of the heat exchange type horizontal butt-joint geothermal well comprises the following steps that drilling is conducted on the ground surface until drilling into the stable clay layer or under a bedrock surface, a vertical well first opening well hole is formed, then second opening is conducted from the bottom of the vertical well first opening well hole until drilling under an arbitrary mudstone layer with a thickness being greater than 6m in the target heat storage layer, and a vertical well second opening well hole is formed; drilling is conducted in the surface of the ground surface until drilling into the stable clay layer or under a bedrock surface and the distance between a well opening of a vertical well and the surface of the ground surface is at least 250 m, and a horizontal engineering well first opening well hole is formed; then second opening is conducted from the bottom of the horizontal engineering well first opening well hole, and a horizontal engineering well second opening well hole is formed and communicates with the vertical well second opening well hole in a butt-joint mode, thus a horizontal engineering well cylinder and a vertical well cylinder form a U-shaped pipeline in a seamless butt-joint mode, and the structure is large in section surface area, heat exchanging water amount and heat exchanging amount; and according to the construction method for the well structure of the heat exchange type horizontal butt-joint geothermal well, heat exchanging is achieved only by using circulation of cold and heat water, no underground water is pumped, water resources are protected, the underground water is not polluted at the same time, and the environment-friendly effect is achieved.

The invention discloses powdery compound feed for the anguilla marmorata adult stage. The powdery compound feed comprises fish meal, pre-gelatinized starch, fermented soybean meal, extruded soybean, fish oil, beer yeast, mineral, monocalcium phosphate, choline chloride, vitamin complex and the like. Compared with the traditional feed, the powdery compound feed for the anguilla marmorata adult stage, disclosed by the invention, has the advantages of comprehensive nutrition, little pollution to culture water and wide source of raw materials; and compared with the existing powdery compound feed for the Japanese eel adult stage, the powdery compound feed for the anguilla marmorata adult stage, disclosed by the invention, has the advantages of high feed conversion rate, high digestion utilization rate, high protein content, low fat content, no need of coloring components and the like, and is green and pollution-free.

The invention discloses a waterless washing method and a waterless washing device, wherein, the waterless washing method is that: clothes are put into a vessel with photocatalyst; under the light source, the hydroxyl radical and active oxygen generated in the light catalytic reaction of the photocatalyst can decompose the organic and inorganic dirt. The waterless washing device comprises a housing, at least a vessel in the housing to accommodate the clothes and a light emitting device; wherein the vessel accommodates the photocatalyst and light catalytic reaction of the photocatalyst occurs lighted by the light emitting device.

The invention discloses a special compound fertilizer for rice. The special compound fertilizer is prepared from the following raw materials of 40-50 parts of an organic fertilizer,10-15 parts of straw, 20-30 parts of a nitrogenous-phosphorus-and potassium fertilizer, 3-5 parts of calcium superphosphate, 3-5 parts of ferrous sulfate, 3-5 parts of zinc sulfate, 3-5 parts of hydroxymethylcellulose, and 0.3-0.5 part of a microorganism microbial population. The invention further discloses a preparation method and applying method of the special compound fertilizer. Through a reasonable fertilizer formula, the simple and easy preparation method and the simple and easy applying method, the finally-obtained fertilizer is rich in various constants and micro nutrients, required by the rice. The fertilizer has remarkable effects in the respects of ecological microbial population adjustment, nutrient feeding, fertilizer utilization and the like of soil, so that the fertilizing amount is greatly reduced, and the cyclic utilization, the low carbon and the high efficiency of the straw are realized. Soil organic matters are markedly increased, the farmland fertility is persistently maintained, the agriculture point source pollution is reduced, the farmland biological diversity is effectively protected, the water resources and the ecological environment of local valleys are effectively protected, and the agricultural sustainable development is promoted.

The invention discloses an acid mist collecting disposing device, which comprises the following parts: acid mist collecting mechanism, gas-liquid separated acid mist recycling mechanism, acid mist predisposing mechanism, acid mist disposing mechanism, fan, vent chimney and corresponding connecting duct line, wherein the duct line collecting mechanism, potcher and pickling bath are used to collect the acid mist generated from potcher and pickling bath; the gas-liquid separated acid liquid recycling mechanism connects acid mist collecting mechanism to separate and recycle acid liquid; the acid mist predisposing mechanism is set between the acid mist predisposed mechanism to predispose the acid mist in the acid mist disposing mechanism; the acid mist disposing mechanism washes and adsorbs the acid mist; the fan is connected between the acid mist disposing mechanism and smoke chimney generated by acid mist disposing mechanism to drain the waste gas out of drainage chimney. The invention can be applied in the waste disposing system in the steel surface disposing domain, which saves water and reduces the pollution of waste gas and waste water to improve economic and environmental benefit.

The invention discloses a treatment method for cellulose fermentation wastewater. The steps are as follows: firstly, the wastewater is processed with the iron-carbon reaction tank treatment; secondly, the wastewater is processed with hydrolysis acidification-anaerobic fermentation process; thirdly, the wastewater is processed with two-stage sequencing batch activated sludge treatment, and then the treatment is completed. The treatment method not only can achieve the treatment requirements and protect environment, but also the treated wastewater can be reused for cellulose fermentation, through which the cost and water source can be saved. The treatment method is characterized in that the process effect is stable and reliable, the operation is simple and convenient, the operation cost is low, the method is accessible for industrial application and so on.

The invention discloses soft-granule pseudosciaena crocea medium compound feed which comprises fish meal, pre-gelatinized starch, extruded soybean, fermented soybean meal, corn protamine, fish oil, beer yeast, mineral, monocalcium phosphate, choline chloride, vitamin complex and the like. Compared with the traditional feed, the soft-granule pseudosciaena crocea medium compound feed disclosed by the invention has the advantages of comprehensive nutrition, little pollution to culture water and wide source of raw materials; and compared with the existing extruded granulated feed, the soft-granule compound feed has the advantages of high feed conversion rate, high digestion utilization rate and the like, and is convenient to produce and green and pollution-free.

The invention relates to a wet expanded granular formula feed for soft-shelled turtles. The feed is prepared from the following raw materials in part by weight: 20 to 30 parts of whitefish meal, 20 to 30 parts of Engraulis japonicas meal, 15 to 25 parts of flour, 2 to 5 parts of beer yeast, 8 to 15 parts of bean pulp, 1 to 2 parts of monocalcium phosphate, 1 to 1.5 parts of complex vitamin for soft-shelled turtles, 0.5 to 1 part of polymineral for soft-shelled turtles, 0.2 to 0.4 part of antioxidant and 0.1 to 0.2 part of preservative. Compared with the prior art, the feed has the advantages that: the feed has a scientific formula and balanced nutrients, and is high in digestion and absorption rate, soft in granules, high in stability in water, high in palatability and convenient to use. Before the feed is fed, manual water addition and oil addition are not required, time and labor are saved, and harmful bacteria can be effectively reduced when the feed is processed.

The invention discloses an efficient ore washing machine. The efficient ore washing machine comprises a base; the top of the base is fixedly connected with a first support frame and a second support frame through bolts; the first support frame is positioned on one side of the second support frame; the top of the first support frame is fixedly connected with a first support cylinder through bolts;the top of the second support frame is fixedly connected with a second support cylinder through bolts; an outer cylinder is arranged between the first support cylinder and the second support cylinder;and the outer wall of one side of the first support cylinder is fixedly connected with a second motor through bolts. On the one hand, the efficient ore washing machine prevents the problem of difficult cleaning of high-viscosity soil on ores in non-flowing water, guarantees the cleaning of the ores, reduces impurities absorbed on the ores, and guarantees subsequent machining quality of the ores;and on the other hand, through spraying of water currents, the consumption of water is reduced, the problem of the water resource waste caused by need of a lot of water in ore cleaning is prevented, and the environmental protection property of the ore washing machine is improved.

This patent provides a method to produce alcohol using discarded sugar materials from sugar refinery's mud. In the sugarcane refinery, the sugar juice is filtered in the press filter as normal technology, stop filtering when the filter mud is spreaded all over the press filter. use sugar condensed water to wet the mud until saturation, then continue to filter the mud for 1-6 min. Collect the filtered sweet water, send to the alcohol factory to replace the molasses diluted water of alcohol fermentation process, clean up the mud in the press filter, then filter sugar juice over again. Using the sweet water instead of molasses's diluted water during the alcohol fermentation, water consumption can be saved, the burden of sludge treatment can be alleviated, and the alcohol productivity can be increased 0.5-1%, all of which contributed to increase enterprise's efficiency.

The invention discloses a method for rains on the ground to be quickly collected and infiltrated, comprising water drainage device set under the road surface, the said device comprises catch basin and drain pipe set on the catch basin, the catch basin is installed with covers without holes, and diversion well is also set aside the catch basin, the shared wall of diversion well and catch basin is set with overflow, numerous water holes are dig on the diversion well, the diversion well is set with covers with holes and connects infiltration ditch filled with stones. The invention is applicable for quick rain collection and infiltration of city roads.

The invention discloses a method for realizing water-preserved mining by utilizing a curtain grouting technology. The method comprises the following steps: first determining mining area and a mining depth; determining a depth of an impermeable bedrock (4) at a lower part of a coal bed (3) to be measured; drilling deep holes, along borders of the mining area with intervals of a certain distance, from ground (1) to the impermeable bedrock (4) at the lower part of the coal bed (3) by utilizing the curtain grouting technology; then pouring slurry into pores or fissures around the holes by high pressure, wherein the slurry connects soil or rock surrounding the pores or fissures into a cylindrical impermeable water body, and if hole spacing is suitable, these cylindrical impermeable water bodies connect to form a complete water blocking curtain in order to achieve the purpose of seepage prevention; and draining groundwater in the upper part of the coal bed to be mined in the range of the curtain, and mining the coal bed to be mined, wherein if there are more than two coal beds in the scope, the coal beds can be mined one by one. The method provided by the invention can effectively prevent water inrush accident in mining, as well as greatly reduce the drainage time and cost, and achieve the target of water-preserved mining, and has obvious social and economic benefits.

The invention relates to the technical field of wastewater recovery treatment, in particular to a domestic wastewater recovery treatment device. A box cover is arranged above a box body, a water inletis formed in the center of the box cover, a water inlet pipe penetrates through the water inlet to be fixedly connected with the box cover, an electromagnetic valve and an impurity groove are connected to the water inlet pipe, a coarse filtration layer is arranged below the water inlet, a fine filtration layer is arranged below the coarse filtration layer, an activated carbon adsorption layer isarranged below the fine filtration layer, a water outlet is arranged on the lower side surface of the box body and fixedly connected with a water outlet pipe, a water pump is mounted on the water outlet pipe, a water storage tank is located on one side of the box body, the water outlet pipe is fixedly connected with the water storage tank, an ultraviolet disinfection lamp is arranged in the waterstorage tank, and a master control unit is arranged on the outer side of the water storage tank and electrically connected with the electromagnetic valve, the water pump and the ultraviolet disinfection lamp. The domestic wastewater recovery treatment device has the benefits as follows: the device is simple in structure and lower in cost, secondary utilization of domestic water can be improved, domestic water consumption is reduced, and water resources are protected while the production cost is saved.

A functional high-molecular microsphere for detecting heavy metal ions and separating them from sewage is prepared through synthesizing the oligomer from N-vinyl acetylamine (NVA), preparing macro-molecular monomer, graft copolymerizing with styrene to obtain PNVA-g-PS microspheres, hydrolyzing in acid or alkaline solvent, and reacting on p-methyl azocarboxylate.

The invention discloses an intelligent bathing all-in-one machine for pets, and relates to the technical field of pet bathing. The bathing all-in-one machine comprises a machine body, the machine body is built through a main body frame, the bottom end of the machine body is provided with footmaster casters, the top end of the machine body is provided with a top plate, the two sides of the machine body are provided with side door frames, and the front end of the machine body is provided with a front door frame; a pet observation window is arranged on the front door frame, a display panel is further installed on the front door frame, and a door plate switch used for opening the front door frame is further installed on the front door frame. According to the intelligent bathing all-in-one machine, a bathing and drying assembly is arranged, an electric push rod is used for driving an annular pipe to clean and dry the pets in a safety frame, compared with a traditional rotary type safety frame, the pet bathing experience is improved, the pets do not move randomly during bathing, and the pet bathing safety is improved; and in addition, bathing and drying are integrated, the pet bathing efficiency is higher, and practicability and convenience are achieved.

The invention discloses a method capable of photocatalytically degrading dyes to prepare copper-loaded nano titanium dioxide chitosan composite microspheres in a microfluidic mode. The method comprises the steps: adding a tetrabutyl titanate solution into an acid solution, mixing to form nano titanium dioxide gel, utilizing an organic solvent to mixing the nano titanium dioxide gel with amine terminated hyperbranched polymer to obtain mixed liquor, then adding a copper ion solution into the mixed liquor, drying to obtain copper-loaded nano titanium dioxide powder, adding the copper-loaded nanotitanium dioxide powder and chitosan into the acid solution to be mixed to obtain a dispersion phase, mixing sorbitan fatty acid ester with a hydrocarbon mixture to obtain a continuous phase, mixingthe dispersion phase with the continuous phase in a microfluidic mode and drying to obtain the copper-loaded nano titanium dioxide chitosan composite microspheres. According to the method disclosed bythe invention, the composite microspheres are prepared in the microfluidic mode, so that a material utilization rate is high; the microspheres have large self catalyzing surface areas and high catalytic activity, can effectively reduce dye concentration, reduce toxic components in dye wastewater and protect environment and water resources.

The invention discloses water-saving and efficient ore cleaning equipment. The equipment comprises a first supporting cylinder and a second supporting cylinder, and an outer cylinder, a second motor,a water tank, a filtering tank and a first motor are arranged between the first supporting cylinder and the second supporting cylinder; the filtering tank comprises a wastewater inlet and a filtered water outlet, a flow stabilizing partition plate is arranged in the filtering box, and a plurality of overflowing holes are formed in the flow stabilizing partition plate. According to the equipment, turned ore can be fully cleaned in all directions through ejected water flow, so that the cleaning of the ore is guaranteed, the contact area between the ore and the water flow is increased, water in the outer cylinder is effectively recycled, and soil and broken stone accumulation caused when the water flow does not circulate is avoided. Besides, sewage entering the filtering box can be depositedas soon as possible, the filtered water is recycled, the water consumption of the equipment is reduced, water resources are saved, and the operation efficiency of the equipment is improved.

The invention discloses a coal pillar setting and extracting method for protecting an important water body, which comprises the following steps:1) measuring the target water body actually to gain an included angle theta between a water body boundary and a rock stratum, and a head pressure difference P between the target water body to a coal floor, 2) measuring a collapsing angle sigma actually, 3) measuring a coal face actually to gain a maximal water-flowing fractured zone height H1, 4) confirming an ore district critical water bursting coefficient TS, 5) calculating a minimum pillar coal setting width L1 satisfying strength needs, 6) pumping a target water body water-bearing bed and gaining an osmotic coefficient K, 7) measuring a water-bearing bed water level h of any fracture surfaces and a water-bearing bed water level h1 at a part in contact with the target water body, and calculating an infiltration strength W of a water-bearing bed 4, 8) calculating a minimum coal pillar setting width L2 without infiltration flow,9)taking a larger one between the minimum pillar coal width L1 and the minimum coal pillar width L2 as the optimal coal pillar setting width L when the maximal water-flowing fractured zone height H1 is more than or equal to the thickness M of the waterproof layer 3, and taking the minimum pillar coal width L1 as the optimal coal pillar setting width L when the maximal water-flowing fractured zone height H1 is less than the thickness M of the waterproof layer 3,and 10) stopping extraction when the coal floor is extracted to the optimal coal pillar setting width L from the protected target water body. The method has the advantages that implementation is simple and easy; the water resource can be protected efficiently; the mine hydraulic discharge is reduced; and the resource can be extracted safely.

The invention discloses a degradable seedling growing tray with lignin modified PBAT / PLA (poly (butyleneadipate-co-terephthalate) / polylactic acid) as a base material and a preparation method of the degradable seedling growing tray. The degradable seedling growing tray is prepared by steps as follows: after raw material components are sufficiently mixed, a mixture is extruded and granulated, finally, injection molding is performed by an injection molding machine, and the degradable seedling growing tray is obtained. The degradable seedling growing tray is prepared from raw material components in parts by mass as follows: 30-80 parts of lignin, 5-70 parts of PBAT, 5-60 parts of polylactic acid and 1-10 parts of an auxiliary. According to the degradable seedling growing tray containing ligninmodified PBAT / PLA as the base material and prepared with the method, lignin in a papermaking black liquid can be effectively utilized, waste is recycled, and the environment is protected; meanwhile,the seedling growing tray can be degraded under the natural condition and cannot pollute the environment.

The invention discloses a device and a method for upstream flood interception and drainage of a tailing pond. According to the method for upstream flood interception and drainage of the tailing pond, flood dams, flood guide and drainage tunnels and overflow facilities are constructed on an upstream side of the tailing pond to intercept most of flood under design standards and all daily surface runoff in an upstream drainage basin of the tailing pond by the flood dams and drain the same through the flood guide and drainage tunnels, a small part of flood beyond flood interception and drainage capacity in a flood peak time overflows to the tailing pond through the overflow facilities, and peak elimination is reduced by flood regulation storage capacity control of the tailing pond. By the method for upstream flood interception and drainage of the tailing pond, damming project amount of the flood dams is decreased, sections of the flood guide and drainage tunnels are reduced, project amounts of the flood guide and drainage tunnels is decreased as well, and accordingly investment is saved; in addition, sewage removal and flow distribution can be realized to protect the environment and water resources.

The invention provides a desulfurization waste water treatment system suitable for a coal-fired power plant. The desulfurization waste water treatment system comprises a boiler, an air preheater, a flue, a dust remover, a desulfurization tower, a waste water chemical adding treatment device and a concentration device. Turbid waste water drained by a desulfurization system enters the waste water chemical adding treatment device to be preliminarily treated, and clear water obtained after treatment is conveyed to the concentration device through a clear water pump. Thick-thin separation is carried out in the concentration device, the clear water which is separated out is recycled, thick water is conveyed into the flue in front of the dust remover behind the air preheater of the boiler througha pump, and a spraying device is arranged in the flue to atomize the waste water to evaporate the waste water by waste heat of flue gas; after liquid-state components in the desulfurization waste water are evaporated, remaining solid matter is removed from the dust remover, and steam formed after the liquid-state components in the desulfurization waste water are evaporated enters the desulfurization tower along with the flue gas and then is exhausted by a chimney. Zero release of the desulfurization waste water of the coal-fired power plant can be achieved, the desulfurization waste water isevaporated by fully utilizing the waste heat of the flue gas of the coal-fired power plant, it is not needed to consume other heat sources, and energy saving and emission reduction are achieved.

The invention relates to a retarded cement grout for sealing water of an ultra-deep freezing-hole solid pipe. Cement and water, at a mass ratio of water to ash being (1: 1) to (1.25:1), are taken as main base stocks and are mixed and stirred, and then stabilizing agents, retarders, expanding agents and tackifiers by weight percent of the usage of the cement are respectively added, mixed and stirred, thereby obtaining the retarded cement grout. The initial solidifying time of the retarded cement grout can reach 36 hours and the allowed sinking time of a freezing pipe can reach 32 hours. Hole-forming slurry is locally or wholly replaced by the retarded cement grout, and after the retarded cement grout is solidified, a local or whole hole water-sealing section can be formed in the hole, so that the hydraulic power connection of deep and shallow ground layers is isolated, the freezing-hole is prevented from becoming a water-conducting channel after a freezing wall is unfrozen and the safety of deep underground engineering is ensured. The retarded cement grout is suitable for the water sealing construction of the freezing-hole solid pipe under the conditions of 1200m hole-depth and 40 DEG C ground temperature in a whole-depth freezing process shafting project. The retarded cement grout has significant engineering practical value in ensuring the engineering safety and avoiding water resource loss, and the economic benefit and the social benefit are obvious.