90 results about "Trihalomethane" patented technology

A removing agent for heavy metal ion in water which comprises synthetic zeolite, wherein 10 mol % or more of a total amount of exchangeable cation is substituted with magnesium ion and 60 mol % or more thereof is substituted with magnesium ion and calcium ion, and activated carbon at a weight ratio of 2:98 to 50:50 can effectively adsorb and remove heavy metal ions such as lead in water as well as residual chlorine and trihalomethane efficiently, particularly, in tap water, so as to allow delicious and healthful water without disturbing the balance between calcium ion and magnesium ion.

In addition to health implications, trihalomethanes (THMs) poses a challenge to the electronic industry where such impurities cannot be tolerated. A process is provided for removing THMs from high-purity water used in the electronic industry. The method of the invention comprises contacting the high-purity water with a membrane degassifier, preferably operating at a temperature exceeding 45° C.

Provided is a preparation method for 17a-hydroxyprogesterone or analogs thereof, comprising the following steps: the compound as represented in formula (4) reacts in solvent and trihalomethane in the presence of magnesium metal and lithium halide; hydrolysis is carried out using acidic substance; the target product (1) is collected from the reaction product. The present invention lowers production cost and prevents problems such as environment polluting byproducts and highly toxic, unstable reagents and intermediate products. The reaction conditions are moderate, and the purity after simple purifications can exceed 99%. The present invention is easy to implement in industry. The reaction formula is as (4), (1).

The invention provides an apparatus for preparation of hypochlorous acid water. The apparatus includes: a water inlet device; a mixer with a first inlet connected to the outlet of the water inlet device; an electrolytic device with a chlorine gas outlet connected to a second inlet of the mixer; an electrolyte solution sampling device with an outlet connected to the electrolytic device inlet; and a control system for controlling the electrolytic device, the water inlet device and the electrolyte solution sampling device. The hypochlorous acid water preparation apparatus provided by the invention includes the control system, which controls the electrolytic device, the water inlet device and the electrolyte solution sampling device, by controlling the electric current of the electrolytic device, the water inflow of the water inlet device and the electrolyte solution transport flow of the electrolyte solution sampling device, the obtained hypochlorous acid water has a low content of available chlorine. The hypochlorous acid water prepared by the apparatus provided by the invention does not have excessive free chlorine, and cannot form trihalomethane with organic matters in the environment. Therefore, the hypochlorous acid water is safe and harmless to serve as a disinfectant.

A method of and system for treating water to reduce the level of trihalomethanes includes the water to be treated (WTBT) being sprayed through a nozzle to aerate the WTBT to increase the air / water interface therein reducing the level of trihalomethanes in the water. In one embodiment, the pressure of the WTBT in the nozzle is adjusted and the nozzle is selected to have a nozzle orifice such that the droplet size of the water to be treated from the nozzle is less than 150 microns SMD. In addition, the nozzle is spaced from a holding tank for receiving and collecting the sprayed water such that the surface of the treated water is a minimum of four meters from the nozzle.

The invention discloses an infrared ceramic kettle with an absorbing function and process for producing the same. The process comprises the following steps of: mixing bamboo charcoal powder or biological ceramic power and clay, adding water, uniformly stirring the mixed solution, and performing vacuum de-airing by using a vacuum de-airing machine to obtain blanks; removing iron-containing components from bamboo charcoal powder and clay in the blanks, making a mold according to the shape and the size of the kettle and the shrinkage ratio of bamboo charcoal ceramics after burning, putting the aged blanks in the mold, pressing the blanks by using a punch to obtain a semi-finished product, grinding the outer surface of the semi-finished product, blocking pores on the outer surface of the semi-finished product, and sintering the semi-finished product at high temperature; and finally, putting the semi-finished product in a coaming, filling the coaming with the bamboo charcoal powder and sealing, and sintering the semi-finished product at high temperature. The infrared ceramic kettle has the advantages of removing excessive chlorine and trihalomethane from tap water, removing pesticide residue which is harmful to human body and heavy metal pollutants such as lead, cadmium and mercury, and making acidic water be weakly alkaline. Anyway, the infrared ceramic kettle has eight biggest advantages of 1, adsorption; 2, release of anions; 3, release of far infrared rays; 4, release of microelements; 5, control of breeding of microorganisms; 6, expelling of worms and sterilization; 7, oxidation resistance and 8, electrostatic shielding and electromagnetic radiation resistance.

Method and apparatus for treating potable water in municipal and similar tanks to reduce and remove undesirable disinfectant byproducts such as trihalomethanes from the water by providing a water circulation system to create circulation patterns in the tank water and an air flow system for creating an air flow pattern in the headspace region of the enclosed tank above the water surface. In operation, a portion of the tank water is drawn-up a draft tube from the tank floor to above the water surface and sprayed through a nozzle outwardly about a vertical axis and slightly downwardly toward the surface of remaining tank water. The air flow system creates and directs a high volume of air through the tank above the water surface to volatize undesirable trihalomethanes in the drawn-up water portion to gaseous state to enter the air flow pattern and exit the tank into ambient air.

The invention relates to a method and a device for removing trihalomethanes in drinking water by plasma, in particular to water treatment. The device comprises a reactor, a gas discharge tube, a gas circulating pump, an alkaline tank, electrodes, and a high frequency power supply. After water is introduced into the reactor, oxygen and argon are introduced; the gas circulating pump is started, and gas flow speed is regulated; the high frequency power supply is started, gaseous discharge is performed in the gas discharge tube to treat incoming gas, outgoing gas is automatically introduced into the alkaline tank during discharging, hydrogen halide and carbon dioxide are absorbed, residual gas returns to a reaction container, and trihalomethanes in the water are stripped continuously and are introduced into the discharge tube for degradation; when the content of the oxygen in the discharge tube, calculated by percentage, is lower than 0.05%, the oxygen is supplemented to 0.1-10% through a steel oxygen cylinder; When the concentration of alkaline in the alkaline tank is lower than 0.05mol / L, the alkaline is supplemented to 0.1-5mol / L.

The invention provides a water preparation technology of metasilicic acid-enriched low-scale mineral water, and belongs to the technical field of drinking water purification. A technical process comprises thefollowing steps: raw water selection, deep well water taking, rough filtering, safety filtration, nanofiltration, UHT (Ultra High Treated) heating, cooling, fine filtration, UV (Ultraviolet) sterilization, terminal filtration and low-scale mineral water product obtaining, wherein raw water is selected from natural drinking mineral water which is rich in metasilicic acid. According to the water preparation technology provided by the invention, produced water is the metasilicic acid-enriched low-scale mineral water and is suitable for long-time drinking, and the nutrition is better thanthat of existing purified water and other drinking water; the produced water is subjected to fine filtration for removing scales after being subjected to the nanofiltration and the UHT heating, the scaling coefficient is extremely low, the taste and the appearance are improved, the metasilicic acid-enriched low-scale mineral water is more suitable for cooking tea and cooking porridge, and the metasilicic acid-enriched low-scale mineral water is clear and bright in water quality and is eyeable; the produced water is subjected to UHT high-temperature sterilization and then is subjected to medium-pressure UV sterilization and the terminal filtration sterilization, the sterilization modes are all physical sterilization, harmful matters such as bromateor trihalomethane cannot exist in the water, and the quality is safer; the produced water can be encapsulated into packaged drinking water and can also be used as direct drinking water which is piped into homes, and the adaptation of the product is stronger.

The invention discloses a chlorine-free swimming pool system and a full flow and full process ozone disinfection method. The system comprises a swimming pool and a disinfection system; a raw water pipe of the disinfection system is communicated with a overflow gutter of the at the upper part of the swimming pool; a water inlet pipe of the disinfection system is communicated with a backwater nozzle at the bottom part of the swimming pool; a raw water inlet of the disinfection system is connected with a clear water outlet sequentially by the following pipelines: a balancing pool, a water circulating pump, an ozone water mixer, an ozone reaction pot and an ozone-removing device and a filter thereof; the ozone reaction pot air vent valves at the top part of the ozone-removing device and the filter thereof are respectively connected with a tail gas resolver. In the invention, chlorine preparation is completely not used in the normal process of processing water in the swimming pool with ozone disinfection adopted, thus greatly reducing use of chlorine in the water, and preventing generation of peculiar smell and harm to human body caused by generation of by-product cancerogen haloform. The method of the invention features safe operation, reliability, and high degree of automation, thereby being capable of being used as a main water processing method in a high standard and underload swimming pool.