43results about How to "Solve water quality problems" patented technology

The invention provides a method for judging the cause of water quality change in a water source switching area of ​​a water supply pipe network, including measuring the ratio of water quality parameters and the change ratio of dissolved iron during the peak water use period of the water quality change pipe section, the stagnation period at night, and the change ratio of dissolved iron. 比值 , soluble iron 变化比值 0.7‑1.3, turbidity 比值 , total iron 比值 ≤0.5, the water quality change is that the sediment in the pipeline is brought into the water due to the change of the hydraulic condition, and the pipeline is flushed with a large amount of water; if residual chlorine 比值 ≤0.5, turbidity 比值 , total iron 比值 ≥1, soluble iron 变化比值 <0.7, the water quality change is the release of iron as the main substance in the pipeline, gradually increase the proportion of new water sources, and improve the adaptability of the pipeline. This method quickly and accurately judges and analyzes the causes of water quality changes when the water quality of the water supply pipe network changes, and provides solutions to ensure the normal water supply and water safety of the water supply pipe network in the area where the water source is switched. Stability has important guiding significance, it is convenient and easy to implement, simple and fast.

The invention discloses a method for preparing a double-acid ferro-aluminum flocculating agent, which relates to a process for preparing the double-acid ferro-aluminum flocculating agent by using calcium aluminate powder. The method comprises the following steps of: taking the calcium aluminate powder of which the particle size is smaller than 60 meshes, putting the calcium aluminate powder into a hydrochloric acid solution in a part mass ratio of the hydrochloric acid solution to the calcium aluminate powder of 3-5:1, reacting the two materials at a temperature of 98 DEG C for 1 to 1.5 hours, standing the mixture for 30 minutes, and then taking a supernatant to obtain AlCl3 liquid; adding ferrous sulfate to the mixture in a part mass ratio of the calcium aluminate powder to the ferrous sulfate of 9-11:1 at a temperature of between 80 and 90 DEG C, dropwise adding a sodium hydroxide solution of which the concentration is 0.5 mol / L into the mixture after 15 minutes, dropping oxyful into the mixture in a part mass ratio of the ferrous sulfate to the oxyful of 1:1-1.5 when the basicity is 30 to 40 percent, stirring the mixture continuously for 15 to 20 minutes, and then curing the mixture at a temperature of between 50 and 60 DEG C for 12 hours to obtain a liquid product of the double-acid ferro-aluminum flocculating agent; and drying the liquid product of the double-acid ferro-aluminum flocculating agent to obtain a double-acid ferro-aluminum solid product. Tests show that in the solid product, Al2Cl3 is over 30 percent, the total iron is over 1 percent, the insoluble substances is less than 1 percent, and other indexes accord with the national standards. The method has a simple process and a low cost, and the prepared product has a good flocculation effect and high economic and social benefits.

The invention relates to the technical field of water quality detection, and provides a water quality detection device, a refrigerator water supply system and a refrigerator. The water quality detection device includes an installation pipeline and a water quality detection probe. The installation pipeline includes a water inlet pipe section, a water outlet pipe section and a connecting pipe section connecting the water inlet pipe section and the water outlet pipe section. The flow rate of the water pipe section; the water quality detection probe is installed on the connecting pipe section and extends into the connecting pipe section. The water quality detection device avoids being combined with the water tank, thereby avoiding leakage at the joint. In addition, since the flow velocity in the connecting pipe section is greater than the flow velocity in the water inlet pipe section, the water flow in the connecting pipe section is locally accelerated, so that the water quality detection probe inserted into the connecting pipe section is washed by the water flow, and impurities are deposited on the surface of the water quality detection probe. Improve detection accuracy. Since the water quality detection probe is not affected by the accumulation of impurities, the service life of the water quality detection device can be extended.

The invention discloses an automatic filling machine, which comprises a machine frame and an electric control device. A film rolling device for storing and releasing a film, a film connecting device for connecting the film, a disinfecting and cleaning device for disinfecting and cleaning the pulled film, a filling device for filling liquid in a film bag, a forming device for turning and rolling the film into a cylindrical structure, a vertical sealing device for vertically piecing and sealing the cylindrical film, a film pulling device for pulling the film to move and a transverse closing and cutting device for transversely closing and cutting the cylindrical film are arranged on the machine frame in turn. The automatic filling machine provided by the invention is high in production efficiency, lower in cost and high in automation degree.

The invention discloses an indirect evaporation cooling method of generating cold water and cold wind at the same time and a device, belonging to the energy technical field and relating to an evaporation cooling type cold supply. Fresh air firstly enters a multistage evaporation cooling type heat recoverer, is performed with a wet cooling by an exhaust air evaporation cooling process, etc., then enters an evaporation cooler which generates the cold water and the cold wind at the same time and is performed with a direct evaporation cooling by contacting spray water; part of outlet air of the evaporation cooler is outputted to a user, while another part of the wind is used as exhaust air which is exhausted outdoor via cooling inlet air during multistage evaporation cooling process. In the evaporation cooler, the cold water is outputted after circulated and cold water of the user is cooled by the spray water and an air evaporation cooling process; a temperature of outlet water is lower than a wet bulb temperature of inlet air. The invention outputs the cold water for the user and the fresh air at a lower temperature at the same time, solves a mismatching of a flow ratio of air and water in a sensible heat transferring process and a heat and moisture exchanging process, and solves the mismatching caused by a non linearity of a saturated line through a multistage device; a cold water side for the user can be a closed system, and application situations for a unit can be more widely.