68results about "General water supply conservation" patented technology

The present invention discloses a pipeline water quality risk evaluation method based on a water supply network dynamic model. Establishing a water supply network dynamic waterpower and water quality model and performing accurate checking of the water supply network dynamic waterpower and water quality model through determination of the classification type and the evaluation indexes of the pipeline water quality risk; determining the weight of each evaluation index through adoption of the analytic hierarchy process; and dividing the grading standard of each evaluation index parameters based on the state data samples of the pipe network dynamic model, determining the degree of membership of each evaluation index, performing the fuzzy comprehensive evaluation, and determining the grade of the water quality risk of each pipeline in the pipe network. Though the steps mentioned above, all the pipelines of the whole water supply network are subjected to water quality risk evaluation, and the comparison and the ordering are performed according to the evaluation result to determine risk degree ordering of water quality changing and provide decision support for the management and maintenance of the pipe network; and moreover, the pipeline water quality risk evaluation method based on the water supply network dynamic model overcomes the defects that other evaluation methods are simple in index and do not take incomprehensive consideration, and the evaluation result is more reliable to ensure the accuracy and the life cycle of the evaluation.

This invention is a method and apparatus for monitoring the concentration of carbon dioxide dissolved in water by means of conductivity. It distinguishes between the conductivity resulting from carbon dioxide and the conductivity resulting from other constituents dissolved in water. It can be used to monitor the quality of demineralized water, boiler feedwater, steam, or condensate in electric power generation and other industrial facilities. It is constructed by adding a column containing weak base anion exchange resin and a conductivity instrument to a typical cation conductivity monitor. A sample of the water to be monitored flows first through a typical cation conductivity monitor, then through a weak base anion exchange column, and then through an additional conductivity instrument. Conductivity measured at the outlet of the weak base anion exchange column will be essentially due to whatever concentration of carbon dioxide is dissolved in the sample because other dissolved constituents that affect conductivity have been essentially removed by either the cation exchange resin that is part of a typical cation conductivity monitor, or by the weak base anion exchange resin. By subtracting the value of conductivity due to carbon dioxide (at the outlet of the weak base anion exchange column) from the value of cation conductivity (at the outlet of the cation exchange column), the value of degassed cation conductivity is obtained. In the title of the invention, CWB conductivity is an abbreviation for cation—weak base conductivity.In combination with existing methods for oxidizing organic compounds dissolved in water, this invention is also a method and apparatus for monitoring the concentration of dissolved or total organic carbon in water by means of conductivity. It distinguishes between the conductivity resulting from organic carbon and the conductivity resulting from inorganic constituents dissolved in water including carbon dioxide.

The invention provides a photo-catalytic oxidation water treatment device based on a solar fixed film. The device consists of a clear water storage box (1), a to-be-treated water storage box (2), a pretreater (3), a pump (4), a flowmeter (5) and a photo-catalytic reactor (6), wherein a photo-catalytic reactor main body is a box with a top cover through which ultraviolet light can penetrate; the inside of the photo-catalytic reactor is divided into multiple galleries (7) which are connected mutually; 2-5 layers of fixed film catalysts (8) are filled on the side wall and bottom flat of each gallery (7); the catalyst (8) is supported by a special stainless steel net skeleton (22) or long column type skeleton (23); and the catalyst film utilizes a partial euphotic glass fiber net as a carrier on which a permanent TiO2 film is supported. The device has the advantages of simple structure, large treatment amount, high reaction speed and low operation cost, is convenient for manipulation and stable to operate, and can be widely applied to deep treatment of drinking water and preparation of high-pure water or treatment of toxic, harmful, high-concentration and low-degradable inorganic waste water.

The invention relates to a method for discriminating hygrophilous planting of interregional main food crops. The method comprises the following steps: dividing regions; dividing crops; calculating thewater requirement of the food crops every ten days; calculating the effective rainfall capacity within a growing period of the food crops every ten days; calculating the irrigation water requirement;analyzing feature vectors of crop production factors; normalizing; and discriminating the hygrophilous planting. The method is capable of, based on virtual water and a water footprint theory, establishing a discriminating formula for the hygrophilous planting of the main food crops by using an analytical hierarchy process, and providing the method for discriminating the hygrophilous planting of the interregional main food crops by using the formula, objectively and comprehensively reflecting the food production and the water resource application, namely the effective rainfall capacity, the irrigation water requirement and the spatial feature, and providing the scientific basis for the rationalized application of the agriculture water resource and the hygrophilous planting distribution ofthe main food crops.

The invention discloses a cloud-edge collaborative platform architecture for basin water environment water ecological intelligent management. The cloud-edge collaborative platform architecture comprises a cloud end, an edge end, a terminal, a data center, a model center, a control center and a customer service center, wherein the data center, the model center, the control center and the customer service center have relatively independent functions. The cloud end is connected with the data center, the model center and the control center and is responsible for top-layer simulation computation. The edge end is connected with the data center, the model center and the customer service center, obtains the data uploaded by the terminal, performs data extraction, cleaning, fusion and transmissionto form an edge-end ecological environment big database, receives the data generated by the cloud end, and arranges a local simple model to satisfy differentiated services of basin intelligent management. The cloud end and the edge end realize cloud-edge collaborative computing by taking a message center as middleware. The terminal is connected with the data center and the customer service center,has various sensors and users of different departments, carries out multi-source heterogeneous data acquisition and edge service release in combination with the Internet of Things technology, and achieves three-dimensional perception, comprehensive acquisition and directional output of information.

The invention relates to a rainwater garden system applicable to greenhouse irrigation. The rainwater garden system comprises a rainwater collection unit which is arranged at the bottom of the roof ofa greenhouse, a rainwater garden unit which is arranged under a drainage port of the rainwater collection unit, a water collection unit which is connected to a drainage port of the rainwater garden unit and an irrigation unit which is connected to the water collection unit and is arranged in the greenhouse, wherein the rainwater garden unit comprises a saturated water region for planting plants,a non-saturated water region which is arranged on the periphery of the saturated water region and communicates with the saturated water region by virtue of a reverse drainage pipeline and a re-backfill region which is arranged at the bottom of the non-saturated water region; the saturated water region is arranged under the drainage port of the rainwater collection unit; and a drainage port in thenon-saturated water region is connected to the water collection unit. The rainwater garden system, in comparison with the prior art, not only can guarantee a good water-holding capacity and a good capacity of reducing rainwater runoff, but also can guarantee a capacity of greatly improving a removal rate on pollutants in rainwater, and especially, a removal rate on total nitrogen and total phosphorus is obviously improved; and a soil matrix can be replaced conveniently, so that the service life of the entire system is prolonged.

The invention relates to a heat pump based all-weather sea water desalination system. The heat pump based all-weather sea water desalination system comprises a compressor, an evaporative condenser, a finned evaporator, a shall-and-coil evaporator, an electronic expansion valve, a flash intercooler, a turbocharger and a negative-pressure fan. If the temperature is relatively high in summer, and the temperature of the sea water is lower than the local temperature, the finned evaporator is used as an air source heat pump to heat to prepare the fresh water; if the temperature is relatively low in winter, and the temperature of the sea water is higher than the local temperature, the shell-and-coil evaporator is used as the sea water source heat pump to heat and manufacture the fresh water, and the boiling point of the sea water is reduced by utilizing the negative-pressure fan; the turbocharger is used for realizing one-stage compression of a refrigerant, and the compressor is used for realizing the two-stage compression of the refrigerator, so that the air suction volume of the compressor is increased; the flash condenser is utilized to raise the degree of the supercooling of the refrigerator in the major cycle, thus the benefit is provided for increasing the quality and the flow rate of the refrigerator in the major cycle, and as a result, the heating capacity is improved. By adopting the sea water desalination system, fresh water can be supplied for 24 hours a day at all seasons.

The invention relates to a municipal waste harmless recycling method with sewage cyclic utilization. Municipal waste is sorted into waste raw materials and preparation raw materials of waste derived fuel in manual sorting, magnetic sorting and mechanical sorting modes, then the preparation raw materials of the waste derived fuel obtained in the previous process are prepared into the waste derivedfuel, additionally, the raw materials are mixed with clay, limestone and iron powder and are crushed so as to be calcined in a rotary kiln to prepare raw materials for building materials, fly ash andsmoke which are generated by calcination of the rotary kiln are treated in dedusting and chemical reaction modes, and finally, denitrification, nitrification, ultrafiltration and reverse osmosis treatment are performed on sewage, so that the waste cleaning water is purified. The municipal waste is converted into the raw materials for the building materials, the municipal waste can be recycled, sothat the use rate of the municipal waste is greatly increased, and the sewage generated in a waste treatment process can be purified and reused, so that water resources are saved.

The invention discloses a biological pollution resistant reverse osmosis composite membrane and a preparation method thereof. The preparation method comprises the following steps: contacting a porous ultrafiltration support layer with a tannic acid aqueous solution; contacting with a ferric salt aqueous solution; contacting with a silver nitrate solution; contacting with a polyamine aqueous solution; and contacting with a multi-acyl chloride solution, drying in air at room temperature, and soaking in pure water to obtain the biological pollution resistant reverse osmosis composite membrane. Test results show that the anti-biological pollution reverse osmosis composite membrane prepared by the invention has excellent retention rate and antibacterial property, and meanwhile, the retention rate is kept to be 97.4% or above while relatively high water flux is achieved. In addition, the sterilization capability on staphylococcus aureus and escherichia coli is very high. Meanwhile, the membrane has excellent anti-adhesion performance on bacteria, and microbial contamination on the surface of the membrane can be effectively prevented.