38results about How to "Wide range of water quality" patented technology

The present invention provides a disposal of the phthalic acid production wastewater. The steps are: a. the process wastewater output from a refining process is filtered; filtrate and a solid-form object are gained; b. the filtrate is sent to and processed in a multi-effect evaporation system; steaming condensation water and condensation water with organic compound are gained; then the steaming condensation water is recycled back to the refining process and is reused; c. a solid-liquid mixture is gained by adding acid to the condensation water and precipitating; the solid-form object and the filtrate are gained by processing a solid-liquid separation to the mixture; d. water and various organic compounds are gained by fractionating the filtrate; the water is recycled back to the refining process and is reused; the organic compounds are recycled back to a xylene oxidation process; e. various organic compounds are gained though the combination and re-crystallization of the solid-form object in the step a and the solid-form object in the step c. With the present invention, the majority of the PTA wastewater is capable of being recycled and reused in the production after being disposed; in addition, the majority of the organic compounds in wastewater are reclaimed. So the economically using of the PTA wastewater and the organic compounds in wastewater is realized.

The invention relates to an oil refining sewage treatment technology. Oil refining mixed sewage is sequentially treated by oil removal, air flotation, magnetic separation and biochemical treatment, and then is discharged. On the basis of the original oil refining mixed sewage treatment process flow, the invention adds the step of magnetic separation, which can lighten the load of a secondary bio-chemical treatment device, avoids shock to a biochemical system and greatly improves effluent quality in biochemical treatment. The technology of the invention has the advantages of good treatment effect, wide application range of water quality, stable operation, strong operability, simple flow, small investment, low operation cost, etc.

The invention provides a terrestrial heat tail water treating process which comprises the following steps: (1) controlling the tail water temperature after the terrestrial heat water is subjected to heat energy gradient utilization to be less than 45 DEG C; (2) aerating the terrestrial heat tail water by using an aeration tower; (3) flowing the aerated terrestrial heat tail water through a manganese sand filter to be filtered; (4) carrying out membrane integrated treatment on the filtered terrestrial heat tail water by using a double-membrane method process; (5) carrying out boron selective resin absorption treatment on the reverse osmosis water; and (6) filtering the effluent subjected to boron removal by using an active carbon filter and conveying to a use point. Aiming at the harmful ingredients and pollutant types in terrestrial heat tail water, the invention integrates a plurality of water treatment unit techniques, realizes integration and optimization of process systems, is wide in water quality application range of the terrestrial heat tail water, advanced in process and reliable in technique, and has practical popularization and application values in development and utilization in terrestrial heat tail water, and as a result, significant social, economic and environmental benefits are achieved.

The invention discloses a high-efficiency low-phosphorus corrosion and scale inhibiting dispersant and its preparation method. The high-efficiency low-phosphorus corrosion and scale inhibiting dispersant comprises: 2%-12% of sodium benzoate, 1%-5% of molybdate (or tungstate), 1%-2% of thiazole, 3%-6% of anhydrous zinc chloride, 8%-18% of polyphosphonocarboxylate, 5%-15% of acrylic acid-2-methyl-2-acrylamido propane sulfonic acid copolymer, 3%-6% of a stabilizer, 3%-6% of a tracer, and the balance deionized water. The dispersant of the invention can be widely applicable to water quality treatment of circulating water with a sum of hardness and alkalinity of less than 1100mg/L, a chloride ion concentration of less than 1000mg/L, pH of 6.8-9.5, and turbidity of less than 20NTYU. The dispersant provided in the invention has scale and corrosion inhibiting performances able to meet the requirements of industrial circulating water design specifications and a wide source water quality application range, and has the advantages of low phosphorus, environmental protection, strong chlorine resistance, applicability for auto-medicating control, as well as convenient use, etc.

The invention relates to the field of mine water treatment, in particular to a high-mineralization degree mine water treatment method and a high-mineralization degree mine water treatment system. Thehigh-mineralization degree mine water treatment method comprises a mine water membrane concentration process and an evaporation crystallization and salt separation process, wherein in the mine water membrane concentration process, after two-stage concentration, disc tube reverse osmosis is then carried out, so that the salt content of concentrated water reaches 5-8%, and the construction scale, the investment cost and the running cost for the subsequent evaporation crystallization of concentrated salt water are reduced; and in the evaporation crystallization and salt separation process, a cocurrent three-effect evaporation and freezing crystallization process is adopted. The operating flexibility is high; and not only can final production of industrial sodium sulfate and sodium chloride with relatively high quality and a small amount of impurity salt be guaranteed, but also the high-mineralization degree mine water treatment method and the high-mineralization degree mine water treatment system can be applied to treatment of water quality with a wider change range.

The invention discloses a control system and a control method for impressed current cathodic protection. The control method for impressed current cathodic protection comprises the steps that the potential of an inner container is detected; and current output is controlled according to the detected potential of the inner container so that the potential of the inner container can keep within the preset range. According to the control method for impressed current cathodic protection, the applicable water quality range of the inner container is wide, and the protection effect is good.

The invention discloses a method for removing nickel in chemical nickel-plating wastewater, comprising the steps of: (1) chelation reaction: reacting nickel in wastewater with a chelant to form a nickel chelate; (2) composite flocculation precipitation: subjecting a polymeric Mg-Fe composite flocculant and the nickel chelate obtained in the step (1) to composite flocculation precipitation; and (3) multimedium filtration: filtering the wastewater subjected to the composite flocculation precipitation in the step (2) by adopting a multimedium filter method. The treated wastewater is discharged when nickel content in outflow water reaches the standard. The method has the advantages of good treatment effect, simplicity for operation and management and low operation cost and is a good method for removing the nickel in the chemical nickel-plating wastewater.

The invention discloses an efficient composite carbon source agent for wastewater treatment. The efficient composite carbon source agent comprises the following components in percentage by mass: 4.5-5.5% of sodium acetate, 40-50% of carbohydrates, 1-3% of methanol and the balance of water. According to the invention, the requirements of the market on high-quality and high-efficiency water treatment chemicals can be met; and the efficient biological composite carbon source can effectively provide enough carbon source for biological flora in a biochemical system, and can ensure the safety of theuse process.

The invention discloses a water body heavy metal ion pollution flocculation sediment preparation and a preparation method thereof. The water body heavy metal ion pollution flocculation sediment preparation is prepared from the following raw materials in parts by weight: 18 to 26 parts of sodium methallyl sulfonate/acrylamide/acrylic copolymer, 15 to 20 parts of sulfonated styrene-maleic anhydridecopolymers, 13 to 19 parts of 2-amino-3-mercaptoyl chitosan, 5 to 10 parts of hydroxyethylenediamine trisodium triacetate, 16 to 22 parts of polymeric aluminum ferric biacid, 6 to 12 parts of sodium alginate sulfate, 4 to 8 parts of starch xanthate, 14 to 21 parts of alum, 3 to 6 parts of tetradecylpyridinium chloride, 5 to 10 parts of Pulullan, 2 to 5 parts of guar hydroxypropyltrimonium chloride, 1 to 4 parts of behentrimonium methosulfate, 17 to 24 parts of beidellite and 15 to 20 parts of amblygonite. The prepared water body heavy metal ion pollution flocculation sediment preparation has the advantages that the flocculation effect is good; the settlement separation is fast; the efficiency is high; the chemical adding quantity is small; the applicable water quality range is wide; organic matters and various heavy metal ions in the water body can be effectively eliminated; certain sterilization, disinfection and decoloring capability are realized.

The invention discloses an electric flocculation and oxidation integrated wastewater treatment device and treatment method, and relates to the technical field of wastewater treatment. The device comprises a reactor, a power supply, an electro-oxidation anode plate, an indirect electric flocculation cathode plate and a stirrer, the reactor is used for containing wastewater, the electro-oxidation anode plate and the indirect electric flocculation cathode plate are arranged in parallel, and at least one part of the electro-oxidation anode plate and at least one part of the indirect electric flocculation cathode plate are both located in the reactor; the power supply is communicated with the electro-oxidation anode plate and the indirect electric flocculation cathode plate through wires; the stirrer is used for controlling the mass transfer process of wastewater in the reactor. The method is used for removing suspended pollutants and refractory organic pollutants in the wastewater.

The invention discloses a toilet design method, and belongs to the field of a toilet. According to the toilet design method, a toilet comprises a toilet piston, a shaft pipe, a toilet basin, a toiletpipeline and a cross shaft pipe; the toilet basin is connected with the toilet pipeline; and the piston is fixed inside the pipeline by the shaft pipe and the cross shaft pipe. The toilet design method is characterized in that the piston is positioned below a toilet outfall; a distance interval is formed between the bottom of the piston and the toilet outfall; excrement falling from the toilet outfall falls on the piston and can slip to the bottom of the pipeline through the interval; the upper surface of the piston is of an eccentric surface structure; a position at the outer edge of the lower bottom of the piston, which is at the shortest distance with the vertex of the piston is a first position; and the first position and the cross shaft rod are positioned on the same side of the piston.

The invention relates to the field of water treatment, in particular to a biological nitrogen and phosphorus removal method and system for sewage. The method comprises the following steps: 1) performing anaerobic treatment on a to-be-treated water body; 2) carrying out anoxic treatment on the water body obtained by anaerobic treatment; 3) carrying out aerobic treatment on the water body obtained by anoxic treatment; 4) carrying out oxygen elimination treatment on the water body obtained by aerobic treatment; 5) refluxing a part of supernatant of the water body obtained by oxygen elimination treatment to the step 2) for anoxic treatment; 6) carrying out membrane-based biological treatment on part of supernatant of the water body obtained by oxygen elimination treatment; 7) carrying out precipitation treatment on a lower-layer mud-water mixture of the water body obtained by the oxygen elimination treatment; 8) refluxing part of the water body obtained by the membrane-based biological treatment to the step 1) for anaerobic treatment; and 9) refluxing part of the water body obtained by the membrane-based biological treatment to the step 3) for aerobic treatment. The method is good in removal effect of total nitrogen and total phosphorus pollutants, simple and convenient to operate, low in energy consumption and stable in up-to-standard emission.

The invention discloses filter membrane equipment adopting self-coupling mounting, and belongs to the technical field of environment-friendly sewage treatment. A membrane element is arranged in a frame, and the filter membrane equipment is immersed in sewage in an MBR aerobic biochemical pool and comprises a slide rail system, a water retaining system, a lower aeration system, an upper aeration system, a cleaning water pump, a cleaning agent box, a fan, a water producing pump and valves; water outside a filter membrane enters the inner side of the filter membrane through the surface of the filter membrane under negative pressure suction of the water producing pump and flows out through a water producing pipe, and pollutants are retained outside the filter membrane; the membrane element isconvenient to take out by arrangement of slide rails, and offline regenerative cleaning is facilitated; when operation is stopped for a long time or operation is not suitable for sewage treatment, water baffles on the periphery are inserted into grooves, clear water is injected into the frame, the membrane element is isolated from the sewage, so that the membrane element cannot be polluted by thesewage, and by design of an aeration cavity, the upper aeration system and breather pipes in the middle of a membrane bundle, the pollutants cannot be accumulated in the membrane element easily.