70results about How to "Alleviate water scarcity" patented technology

The invention relates to the technical field of sponge city construction, and provides a rainwater collecting and processing system. The system comprises a water diversion system, a rainwater seepage unit, a rainwater storage unit, a rainwater processing unit and a rainwater recovering unit; the water diversion system comprises a rainwater collecting groove, a water diversion pipeline, a water diversion pond and a water conveying pipeline, the rainwater collecting groove is connected with the water diversion pond through the water diversion pipeline, and the water diversion pond is communicated with the rainwater seepage unit through the water conveying pipeline; the rainwater seepage unit is arranged in a city green land and used for conveying collected rainwater into the underground rainwater storage unit; the rainwater processing unit filters the rainwater many times, and the sterilized rainwater is conveyed to the place needing water through the rainwater recovering unit. The sponge city rainwater collecting and processing system uses the rainwater for irrigation, toilet flushing, vehicle flushing and landscape water supplementing, saves tap water, reduces water treatment cost and effectively relieves the problem of water resources shortage.

The invention discloses a watering-fertilizing integration water retention agent, a preparation method thereof and an application thereof. The water retention agent is prepared from a water soluble polymerization monomer, bagasse or a bagasse derivative, ground phosphate rock, a free radical polymerization initiator, and a crosslinking agent. The method of the invention, which treats bagasse as araw material, allows an agricultural waste resource to be effectively utilized, and the cheap and abundant ground phosphate rock is added in the method, so the cost of a product (the water retention agent) of the invention is low. In addition, the ground phosphate rock, which is also used as a raw material in the method of the invention, can be reacted with residual acidic monomers and can release water-soluble phosphor which can be absorbed by plants, so the poisoning effect brought by the residual acidic monomers is substantially reduced; and the ground phosphate rock can stably and durablymaintain and release nutrients needed by the growth of crops through a swelling effect under the effect of a sustained and controlled release system of the water-retaining agent, so the water retention agent allows soil to be more suitable for the plants to grow and the biological utilization degree of the nutrients in a fertilizer to be improved.

The invention discloses a novel four-purpose system capable of cooling, heating and providing hot water and fresh water by using a heat pump of seawater. The novel four-purpose system is characterized in that the system comprises a heat pump system, a fresh water preparation system and a hot water preparation system, wherein the heat pump system includes a compressor (1), a heating condenser (3), a first throttle valve (4), a refrigerating evaporator (5), a gas-liquid separator (7), a liquid reservoir (8), a refrigerant loop solenoid and a water side loop solenoid. The fresh water preparation system comprises a coil condenser (2), a first air channel (18), an inlet air pre-heating heat exchanger (9), a spraying room (10), a water baffle (16), an evaporator (6) for desalting, a second throttle valve (50), and a solenoid (19). The hot water preparation system includes a heat exchanger (11) for preparing hot water, a first air channel (15) and a solenoid (20). The system has the advantages of compact structure, multiple purposes, high-efficiency utilization of waste heat, lowered cost and reduced space.

The invention relates to a combination process for advanced treatment on urban storm runoff, which comprises rainwater treatment and backwashing sewage disposal, wherein the rainwater treatment comprises the following processes that: a pressurized water pump conveys rainwater collected in a rainwater raw water tank to a quartz sand filter, an activated carbon filter, a PP filter element and an ultrafiltration membrane component sequentially through pressurization, and the treated rainwater is stored in a water producing water tank; and the backwashing sewage disposal comprises the following processes that: when the quartz sand filter and the activated carbon filter are washed, a valve between the activated carbon filter and the PP filter element is closed, and the a sewage valve positioned at the top of the quartz sand filter and the activated carbon filter is opened; pressurized rainwater raw water passes through the quartz sand filter and the activated carbon filter sequentially at a high speed, and impurities absorbed on the surface of a filter material are washed by utilizing the impulsive force of high-pressure stream; and when an ultrafiltration membrane is subjected to backwashing, a solenoid valve I and a solenoid valve II are opened, a solenoid valve III is closed, a transfer pump conveys the water in the water producing water tank to the ultrafiltration membrane component, the water is pressed into an inner membrane of the ultrafiltration membrane from an outer membrane of the ultrafiltration membrane, and the water is discharged from a backwashing sewage disposal pipeline.

The invention provides a desert soil moisture conservation method and an application, belonging to the technical field of desert transform. Original resources are used for transforming the desert, a soil layer is reconfigured to build soil moisture conservation ridges, fine earth, sandy soil and gravel fill back from the bottom up, and the gravels are stacked at one wind block side of the ridge. The invention utilizes the original resources to apply the no-irrigation conservation of desert by adjusting measures to local conditions. The application are as follows: the conservation ridges are used to plant cash crops, and a large area of wild flowers and wild grasses are planted to realize desert oasis, thus not only improving the soil texture of desert areas and the growing environment of cash crops, and but also alleviating lack in the water source because rainfall is rare and ground water is difficult to use and the like. In addition, the invention can solve the problems of strong wind power, difficult growth for plants and the like in gobi desert areas; while the desert transform is applied to obtain good social effect, the invention can plant the cash crops to obtain preferableeconomic benefit.

The invention relates to a self-powdered self-cleaning roof rainwater collecting and processing system device. The device comprises a rainwater bucket, an abandoned flow supporting frame, a water pipe, a water-falling pipe, a water reservoir, a water-retaining floating ball, an ultraviolet disinfection lamp tube, a submersible pump, a primary filter screen, a filter roller, a bypass branch rainwater pipe, a filter sewage interception and collection bucket, a reservoir access port, an aeration overflow pipe, a cleaning mouth, a ring floating ball baffle, an abandoned flow container, a roller filter box, a secondary filter screen, a water sink, a hook, a hook sleeve, a convex lug, a handle, and a curved scraper. The water flow first enters into the abandoned flow container through the water-falling pipe to intercept the sewage flow, the relatively clean rainwater hits the filter roller to rotate, the curved scraper scrapes off the dirt attached to the filter roller, the dirt is thrown into the filter sewage interception and collection bucket under the dual action of the filter roller rotation and the water flow impact, and the rainwater is filtered through filter holes of the filterroller and other multi-layer filtration ways to enter into the water reservoir. The self-powered self-cleaning roof rainwater collecting and processing system device can achieve self-powered self-cleaning roof rainwater collecting and processing.

The invention provides an inner diameter regulating method, an outer diameter trimming fixing method and a design of a field planting basket. The inner diameter regulating method comprises the following steps: separating an inner support into a plurality of sections each of which is directly connected to an outer support (1); drilling a hole, preserving a groove or forming a hook, a hook buckle or convex-concave buckles on the inner support (5); stringing the sections of the inner support (5) into a soft ring by a rope (8) through the hole, the groove, the hook or the hook buckle, so the diameter or shape of the inner support soft ring can be freely adjusted by releasing or retracting the inner support rope; or the convex-concave buckles are buckled on the inner support directly. The outer diameter trimming fixing method comprises the following steps: turning the section frame of the original an in-line outer support into an I-shaped or concave section; and radially extending the outer support by taking the outer support frame as an original point to form an outer support extending frame (20). Therefore, when a consumer selects a vase of which the diameter is not standard, the field planting basket can be matched with the vessel mouth or an outer pot mouth.

The invention includes a method to produce biological carbon and its double-furnate charring furnace. The method is: shatter, filter, dry and place the materials meeting the requirements in to cavity of charring furnace separately, ignite the material in cavity of gasification furnace to make gasification, putout the biological carbon dry distilled and charred in the cavity of charring furnace through the outlet for product. The main structure of double-farnace charring furnace includes there are mouth of pipe in the middle of upper furnace, and cavity of gasification furnace and cavity of charring furnace in the furnace. Its has biological fuel gas with hest value of 800-1000kg / m3, can be reused, after being scatter and add into watersoluble high molecular sticker, is useful to prolong the time of exhaustion of delay the fossil fuel resure; it makes good use of waste in farming and forestry, saves energy, has simple and reasonable structure of double-furnace charring furnace, convenient operation and large quality of processing material, high speed and efficiency of caring in furnace.

The four-in-one appliance combining water heater, drinking water machine, air conditioner and refrigerator has a total power of 330 W. In the four corners of refrigerator, there are four water storing and condensating exchangers, and in the condensator, water absorbs the heat to raise refrigerating efficiency. Warm water of 40-50 deg.c may be used in washing dishes, washing clothing and bathing; and hot water of 70-80 deg.c may be filtered before being used in cooking rice and making tea and coffee, serving as water heater and drinking water machine. The evaporator and heat conducting board are fixed together for absorbing heat, serving as refrigerator. There is cold air passage opposite to the cold storage chamber to cool air and the cold air is exhausted, serving as cooling air conditioner. The present invention makes it possible to eliminate air pollution, heat island effect, water pollution and water deficiency.

The invention discloses a greening irrigation system for sponge cities. The greening irrigation system comprises a water collecting device, a priming pump device, an aeration device and a greening device, wherein the water collecting device comprises a water collecting pool, a water collector and a purification integrated machine; the priming pump device comprises water feed pumps connected with pump water discharge pipes, the pump water discharge pipes are connected with the aeration device which is connected with a water storage tank, and the water storage tank is connected with water storage tank discharge pipes which are connected with the greening device. The construction method comprises steps as follows: (1), excavating foundation pits; (b), building the water collecting pool, an aeration tank and the water storage tank; (c), pretreating a foundation where ecological greening insert blocks are to be laid; (d), laying the ecological greening insert blocks; (e), planting green plants. According to the system, urban rainwater is collected and treated by the water collecting device, the collected rainwater is purified, put into secondary use and applied to irrigation of the greening device, so that not only is the waterlogging phenomenon of the road surface prevented effectively, but also water resource waste can be reduced through rainwater collection.

The invention aims at improving the use of washing basin effluents in water closets in general, including a great variety of washing basins, flushing tanks, flow valves, water closets and the corresponding fixtures, using the permanent natural ventilation of the water closet and an automatic disinfectant dispenser, both for users having a higher purchasing power and for classes having a lower purchasing power, thus minimising the generalised water scarcity. When the system is not actuated by the flow valve, it comprises at least one reservoir (A) inserted into the flushing tank for immediate use, and one or more reservoirs (B) for subsequent flushing discharges, arranged next to each other or separated by a vertical wall, or a plurality of such reservoirs which may be optionally interconnected and shared on the basis of the principle of communicating vessels, all the reservoirs being provided with a check valve (06) or (37) and a septum (91) with a converging flow into the reservoir (A). A short rising pipe (09), the vertical movement of which is controlled by the user, replaces the known flushing valve, the top end of the pipe (09) being inserted into a larger container (13), witha concavity facing downwards and provided with a lateral opening (14) or (15) for connection to a rising pipe (16). The following figures show specific filters for filiform particulate materials, which filters can be removed for cleaning purposes or are disposable, and show the gradual movement of the pipe (09) which allows the quantity of water released during each flushing to be selected. Alsodescribed are alternative methods for manufacturing systems and devices for using washing basin effluents in rooms without permanent natural ventilation from the water closet to the outside.

The present invention belongs to the technical field of agricultural irrigating equipment and particularly relates to a light-small spraying and drip irrigation dual-purpose device for agricultural planting. The light-small spray irrigation and drip irrigation dual-purpose device comprises a small trolley (1), a spraying and drip irrigation double-working-condition pump and diesel engine device (2), a water inlet pipe (3), a spray irrigation pipe (4), a drip irrigation pipe (5), a fertilizer inlet pipe (6), a filter (7) and pressure gages (8), and is characterized in that the spray irrigation and drip irrigation double-working-condition pump and diesel engine device (2) is formed by combining a self-priming pump and a diesel engine, the self-priming pump is fixedly arranged at one end of the small trolley (1), one side of the self-priming pump is equipped with the diesel engine, and the diesel engine and the self-priming pump are of bearing connection; and the water inlet pipe (3) is connected with the spray irrigation pipe (4) and the drip irrigation pipe (5) respectively through a pipeline connected with the self-priming pump. According to the light-small spray irrigation and drip irrigation dual-purpose device for agricultural planting, the conversion between two irrigation manners, namely spray irrigation and drip irrigation, can be carried out freely according to the needs of different crops or different terrains, the present situation that existing conventional units are single in irrigation form currently can be changed, and the adaptive capacity of the units can be improved.

The invention discloses a nanometer asphalt concrete urban road pavement structure based on a sponge city. The nanometer asphalt concrete urban road pavement structure is characterized in that a roadis separated into a water permeable area and a water non-permeable area along the transverse direction; the water permeable area is positioned between the water non-permeable area and a greening belt;curb is arranged between the water permeable area and the greening belt; the water non-permeable area comprises a soil base layer I, a gravel bedding layer I, a cement stabilized macadam base layer I, a lower surface layer I and an upper surface layer I from bottom to top under a motor vehicle lane; the water permeable area comprises a soil base layer II, a waterproof layer, a water storage layer, a gravel bedding layer II, a cement stabilized macadam base layer II, a lower surface layer II and an upper surface layer II from bottom to top under a non-motor vehicle lane; the water permeable area and the water non-permeable area are separated by an anti-seepage cement box body; an anti-seepage cement blocking plate is arranged under the curb and is used for isolating the water permeable area from the greening belt; a rainwater purifying system is arranged under the greening belt. The nanometer asphalt concrete urban road pavement structure has the advantages that the rainwater drainagespeed of the urban road is improved, the total rainwater drainage amount is increased, a large amount of rainwater is collected and reutilized, and the problems of water accumulation, vehicle track, particle falling and the like on the road pavement are relieved.

The invention provides a water saving device to recycle domestic wastewater automatically. The device utilizes the surplus pressure generated when urban tap water pipe net supplies water to families to enhance potential energy of the domestic wastewater, recycles domestic wastewater and automatically supplies to toilet according to the hydraulic principle. The device comprises a water bag, a filter, a water storage tank, a connecting rod, a reversing valve, a check valve, a box shell, etc. The device is driven by surplus pressure of the tap water, recycles the domestic waste water to flush toilet, needs no other power to be added, saves domestic water using, can replace water treatment device of the community and has great importance on reasonable water using and relieving the serious status of water shortage in China.

The invention provides a reinjection treatment method of polysulfonate drilling wastewater. The method comprises the following steps: adding inorganic acid in the drilling wastewater to adjust the pH value to 1-2, reacting for 20-30min to ensure that the suspended matter in water is destabilized and precipitated; then centrifuging to remove the precipitated suspended matter, adjusting the pH value again to 7-8, adding coagulant and coagulant aid to ensure that the coagulant and the suspended matter in water are coagulated to form flocs, removing the flocs, adding oxidant to perform oxidation treatment, and filtering to further remove the suspended matter in water and reduce the medium value of particle size. The invention adopts the treatment technology mainly containing acidification, coagulating sedimentation and secondary filtration and combines the reinforced solid-liquid separation measures such as acid-base regulation and centrifugal separation; and the effluent can meet the C1 grade injected water quality standards of the recommendation quota for injection water quality of fragmental rock fragmental rock oil field (SY / T 5329-94). By adopting the reinjection treatment method of the invention, the environmental pollutions caused by drilling wastewater can be greatly reduced and the situation that the oil field is lack of water resources can be alleviated.

The invention provides a hybrid drive intelligent evaluation control method for a sewage treatment system. The thought based on data and events are considered, and a novel hybrid drive iterative self-adaptive evaluation control design is used to solve the intelligent optimization control problem of one type of sewage treatment system. A neural dynamic programming technology is combined with an iterative adaptive evaluation framework, and under a data-driven learning mechanism, the dynamic information requirement of an optimization control design process on a controlled object is reduced. Meanwhile, a reasonable event-driven threshold value is designed, so that the control signal is updated when a proper condition is met, and the control efficiency of the complex dynamic system is practically improved. By adopting the hybrid drive intelligent judgment control method provided by the invention, the dissolved oxygen concentration and the nitrate nitrogen concentration can reach expected values, and the control efficiency of the whole system is remarkably improved.

The invention relates to a processing method and a system of rinsing waster water in a printed circuit board. The method carries out the solid-liquid separation of the rinsing waste water, filters the waste water to control the particles in the waste water not to be larger than 30 micron and then filters the waste water to set discharge standard through a SiC porous ceramic filter leaf. The system comprises a solid-liquid separating device, a preliminary filtering unit and a depth-type filtering unit. The preliminary filtering unit uses a filtering net or a high molecular film to be a filtering element; the depth-type filtering unit comprises a multilevel filtering unit that uses the SiC porous ceramic filter leaf as the filtering element. The set level of the filtering unit causes drained water after filtering to meet the set standard. The invention adopts the physical filter and adsorption instead of the chemical reaction, thus having remarkable absorption and filter effect of heavy metal ions without introducing other substances. With low cost, little energy consumption, simple operation, small occupied area and wide application scppe, the invention has the good application outlook and the remarkable social benefits.

A motor body dry cleaning agent and its production are disclosed. The dry cleaning agent consists of latent solvent A 0.5-3wt%, organic acid B 1.5-3.5wt%, mineral oil C 10-30wt%, grinder D 0.5-2.5wt% and water residual. The process is carried out by dissolving latent solvent in water, mixing organic acid with mineral oil, adding organic acid and mineral oil mixed into water containing latent solvent, agitating, adding into grinder, agitating and packing. The dry cleaning agent is sprayed on surface of motor body and the motor is swabbed by clean cloth so as to finish body surface cleaning and polishing.

The invention discloses a construction method of a novel greenbelt structure based on a sponge city. The construction method comprises the steps of 1, sorting a planting layer; 2, building an impounding reservoir; 3, storing water for the ground in place; 4, burying a negative well; 5, laying bricks; 6, arranging a control chamber; 7, arranging a probe; 8, conducting greenbelt planting and daily management. The construction method is easy in construction, low in difficulty and ordered in construction, the construction quality is easy to control, less construction equipment is needed, the construction cost is low, the permeation effect is good, water-permeable bricks and water-permeable concrete are laid, so that rainwater quickly infiltrates, the excess infiltration part enters a greenbeltarea, plants in the greenbelt hold up rainwater, and the retention time of the rainwater in the greenbelt area is prolonged.

The invention relates to the technical field of concrete, in particular to a preparation method of fiber concrete. The preparation method comprises the following steps: 1, performing strong acid soaking treatment on plant fibers, then performing strong alkali soaking treatment, and performing shearing and drying to obtain pretreated fibers; 2, the pretreated fibers are weighed and soaked in a water-retaining agent, stirring is conducted for 1-1.5 h, then an antioxidant is added, uniform mixing, heating and stirring are conducted, and modified plant fibers are obtained; 3, the recycled aggregate, the water reducing agent, the inorganic filler, the defoaming agent, the cement, the water, the corrosion inhibitor and the surfactant are weighed and evenly mixed with the modified plant fibers, stirring is conducted for 40-80 min, fiber concrete slurry is obtained, the fiber concrete slurry is poured into a mold to be fixed and formed, and the fiber concrete is obtained and has the good anti-cracking effect.

The invention relates to the technical field of crop production, in particular to an efficient-water-saving potato mechanical ridge film furrow irrigation planting method suitable for northwestern China irrigation areas. The method has the advantages that under-film weeding, moisture increasing and thermal insulation can be achieved, mu yield can be increased, the potato planting in the northwestern irrigation areas is promoted to convert from manual planting to mechanical planting, the problem of irrigation area water resource shortage is solved effectively, disordered underwater resource development and ecological environment deterioration are restrained, and harmonic irrigation area agricultural science development is accelerated; the method which is an effective approach to achieve industrial, systematic and standardized development of potatoes is capable of lowering potato production cost, evident in water-saving, yield-increasing and income-increasing effects, scientific and reasonable, advanced in technology, high in production efficiency, good in social, economic and ecological benefits, capable of effectively solving the technical problems that the agricultural machine andagricultural process of the whole-process mechanical potato production method are not compatible, the potato production manner is outdated, potato production benefits are low, a whole set of mature and reliable production method does not exist and the like, and promising in popularization and application prospect.

The invention provides a collection, storage, and drain integrated rainfall flood holding up culvert which includes a holding up buried culvert and ecological forest. The holding up buried culvert is buried underground. The ecological forest is composed an above ground part and an underground part. The holding up buried culvert is connected to the underground part of the ecological forest. The holding up buried culvert is provided with a plurality of drain holes thereon. The invention also provides a rainwater recycling method. According to the invention, the holding up buried culvert saves land occupation and has small influence on ambient environment. The holding up buried culvert is in a penetration encircling arrangement, so that with respect to point arrangement, the holding up buried culvert has explicit advantages at addressing the problems of large area rainwater recycling by mitigating water resource shortage, alleviating flood prevention burden of downstream cities, and reducing non point source pollution, and the holding up buried culvert has scenic value.

The invention discloses an overpass rainwater collection and greening-oriented automatic irrigation system, including a rainwater collection box and a support frame. A rainwater collection pipe is arranged on the top of the rainwater collection box. A reuse pipe is arranged below a side of the rainwater collection box. An overflow pipe is arranged above another side of the rainwater collection box, and the overflow pipe is communicated with a spray rod component. The support frame includes concrete plates and a main support plate group, and the main support plate group is located between the two concrete plates. The installation method includes the following steps: a, data measurement; b, pouring of concrete plates; c, installation of a support frame; d, installation of a rainwater collection box, a spray rod component and a watering component; and e, pipe connection. The overall structure design of the system is reasonable. Through the setting of the system between two bridge piers, actual installation construction can be facilitated without destroying the structure of the overpass. Through the support frame, the structural stability between the two bridge piers can be increased,and the overall structural strength of the overpass can be improved.

The invention discloses an urban road rainwater intercepting and purifying system and a construction method. The system comprises a rainwater floodway, a regulating reservoir and a flood storage tank, wherein at least two sewage interception devices are transversely arranged in the rainwater floodway, the rainwater floodway is provided with a water inlet pipe, the water inlet pipe is connected with rotational flow filters, and the rotational flow filters are provided with municipal pipelines and clear water outlet pipes. The construction method comprises the steps that (a) the rainwater floodway is constructed; (b) the sewage interception devices are installed in the main path of the rainwater floodway; (c) the sewage interception devices are flushed; (d) the regulating reservoir and the flood storage tank are cast; (e) the rotational flow filters are installed in branches of the rainwater floodway. Urban road rainwater is collected into two ways and are collected, filtered, purified, stored and utilized, the rainwater resource utilization efficiency is greatly improved, waste is turned into wealth, the problem of water resource shortage is relieved, the construction steps are simple, the difficulty is low, the construction quality is easy to control, the construction cost is low, and related construction devices are few.

The invention discloses a wastewater treating device. The wastewater treating device comprises an adjusting pool, a pipeline mixer, a primary filtering system, a secondary filtering system, a primary reverse osmosing system, a secondary reverse osmosing system and an evaporating and crystallizing system. The invention further discloses a wastewater treating method. By the cooperation treatment of the primary filtering system, the secondary filtering system, the primary reverse osmosing system and the secondary reverse osmosing system, a penetrating fluid accounting for about 88% of the volume of wastewater can be recycled to be used as recycled water, and evaporation and crystallization can be further conducted on the rest few penetrating fluid, so that zero emission treatment of wastewater, particularly wastewater high in salt content, can be realized.

The invention discloses a device and method for treating wastewater produced during acid process extraction of aluminium oxide from coal ash. The device for treating the wastewater comprises an adjusting tank, an intermediate water tank, a pipeline filter, ultra-filtration equipment, a primary reverse osmosis system and a secondary reverse osmosis system. The invention also discloses a method for treating the wastewater by utilizing the device disclosed by the invention. By adopting the device and the method for treating the wastewater produced during the acid process extraction of the aluminium oxide from the coal ash, penetrating fluid with the volume more than 80% that of the wastewater can be recycled as circulating water, bad influences of discharged salt-containing wastewater to the local water environment are reduced, and the increasingly severe water resource shortage situation is also alleviated.

The invention discloses a soil steep slope rainwater diversion and infiltration device, which is composed of two pipe grooves formed into an included angle, and forms a rainwater collection groove (1), wherein the rainwater collection groove is connected with a drainage pipe (2) through a rotatable pipe (3) to lead the rainwater into a vegetation planting hole on the slope, and the rainwater collection groove is fixed on the slope surface of soil steep slope by U-shaped nails. As that rainwater collect and infiltrating on the slope surface can be realized, the runoff on the slope surface can be reduced, the moisture content on the slope surface can be improve, the plants on the steep slope can obtain the water required for growth by using the rainwater, the survival rate and the drought resistance can be improved, and the problems of greening and soil erosion caused by the water shortage on the soil slope surface in the semi-arid region can be solved. The invention is suitable for steep soil slope, especially in 45-80 DEG On a steep slope.

The invention provides a drilling fluid prepared from oilfield produced water, and a preparation method thereof. The drilling fluid comprises water, a sulfur eliminator accounting for 0.1-0.3% of the mass of the water, a calcium and magnesium ion remover accounting for 0.1-0.3% of the mass of the water, a salt-resistant corrosion inhibitor accounting for 0.3-0.5% of the mass of the water, a tackifier accounting for 0.2-0.3% of the mass of the water, a flow pattern regulator accounting for 0.2-0.5% of the mass of the water, a flocculation coating agent accounting for 0.2-0.3% of the mass of the water, a fluid loss agent accounting for 0.8-1.1% of the mass of the water, an anti-sloughing agent accounting for 1-2% of the mass of the water, a liquid lubricant accounting for 2-5% of the mass of the water and a solid weighting agent accounting for 20-50% of the mass of the water. The drilling fluid prepared from oilfield produced water provides a new method for the treatment of oilfield water, and also has the advantages of reduction of the freshwater resource demand pressure of drilling fluids, reduction of the construction cost, increase of the economy benefits of oilfields, and realization of sustainable development of the oilfields.

The invention discloses a rainwater collecting pool and a construction method thereof. The rainwater collecting pool comprises a flow abandoning pool and a modular pool; a flow abandoning pool filterscreen is arranged at the middle part of the flow abandoning pool; the flow abandoning pool is divided into a dirt filtering area and a precipitating area by the flow abandoning pool filter screen; one end of the flow abandoning pool is a water inlet, and the other end of the flow abandoning pool is a water outlet; the water outlet is connected with a water outlet pipe; the water outlet pipe is connected with the modular pool; water storage grid layers are uniformly distributed in the modular pool; inspection wells communicating with the water storage grid layers are symmetrically arranged atthe two ends of the water storage grid layers; dirt discharge pumps are arranged at the bottoms of the inspection wells; one inspection well is connected with the water outlet pipe; a sand settling pool is arranged at the bottom of the other inspection well; and an overflow port is formed in the side wall, near one end of the sand settling pool, of the modular pool. The rainwater collecting pool can effectively collect and store rainwater; and through wide application of rainwater collection and utilization, rainwater is retained or infiltrated underground, so that the displacement is reduced,the urban flood disaster threat is relieved, underground water is supplemented, the water environment is improved, and the ecological environment is repaired.

The invention relates to a combined treatment method for shale gas fracturing flowback wastewater. The method comprises the following steps that (1) firstly, coagulants, alkalizers and coagulant aids are sequentially added into the shale gas fracturing flowback wastewater for carrying out coagulation treatment; (2) the wastewater subjected to the coagulation treatment is subjected to electrolytic oxidation treatment, meanwhile, ferrous sulfate and persulfate or hydrogen sulfide are added; (3) the wastewater subjected to electrolytic oxidation is subjected to secondary coagulation treatment, and in addition, the coagulants, the alkalizers and the coagulant aids are sequentially added; (4) the wastewater subjected to the secondary coagulation treatment is subjected to ozone deep oxidation, and meanwhile, catalysts are added; and (5) system sedimentation sludge is dewatered by a filter press, filtrate is subjected to ozone deep oxidation treatment, and filter cake is subjected to curing treatment or bioremediation treatment. When the combined treatment method is adopted for treating the shale gas fracturing flowback wastewater, and the outlet water quality can reach first level discharge standards of national sewage comprehensive discharge or reinjection goals. The method belongs to an effective method for treating the shale gas fracturing flowback wastewater.