36results about How to "Solve the problem of meeting emission standards" patented technology

The present invention discloses integrated membrane process of treating waste water from alkali weight reducing process includes flocculating, pre-filtering to eliminate particles larger than 10 micron, ultrafiltering and discharging ultrafiltered concentrated liquid, nanometer filtering the ultrafiltered filtrate in a nanometer filtering membrane assembly to obtain nanometer filtered filtrate accounting for 80-90 vol% and nanometer filtered concentrated solution accounting for 10-20 vol%, adding concentrated sulfuric acid solution to the nanometer filtered concentrated solution to regulate pH value to 2-3 to separate out terephthalic acid, and filtering out terephthalic acid before post-treatment. The present invention has the advantages of recovering and reusing most of NaOH in the waste water, recovering and reusing 80-90 % of water resource, reduced acid adding amount, and lowered cost.

The invention provides a method for treating livestock and poultry breeding waste water. The method mainly comprises the following steps of solid-liquid separation treatment, efficient nitrogen-phosphorus biochemical circulation treatment, modified oxidation ditch treatment, sludge reflux treatment, filtration and sterilization treatment and the like. The invention aims to provide the method for treating the livestock and poultry breeding waste water, which is high in capability of removing ammonia nitrogen, total nitrogen and total phosphorus and low in investment cost and running cost, and is easier to manage. The waste water treated by adopting the method provided by the invention can meet the requirement of the national Discharge standard of water pollutants for livestock and poultry breeding GB18596-2001; not only can the up-to-standard discharge requirement in the waste water treatment of the livestock and poultry breeding industry be effectively met, but also the difficult problem of removing the ammonia nitrogen while an organic matter is degraded is also solved; and the method is suitable for the waste water treatment of breeding farms on different breeding scales, similarly, is also suitable for the treatment of municipal domestic waste water and waste water with a high COD (chemical oxygen demand) or high ammonia nitrogen characteristic, and is wide in application prospect.

The invention relates to a method and equipment for standards-reaching treatment of chemical nickel plating waste liquid. The method comprises the steps: adsorbing nickel ions from the chemical nickel plating waste liquid by using an ion exchange method; treating the chemical nickel plating waste liquid subjected to the ion exchange method treatment by using a Fenton method so as to carry out oxygenolysis on part of organic pollutants in wastewater, achieve an oxidated decomplexing effect and convert complex-form metal nickel ions into free-form nickel ions, meanwhile, oxidating organic substances in the waste liquid, destroying carbon chain structures of the organic substances, finally converting the organic substances into carbon dioxide and water, and lowering the COD of the wastewater; treating the chemical nickel plating waste liquid subjected to the Fenton method treatment by using an ammoniomagnesium phosphate precipitation method, carrying out a reaction so as to produce indissoluble ammoniomagnesium phosphate precipitates, thereby removing ammonia nitrogen from the wastewater; carrying out further ammonia nitrogen removal by using a break-point chlorination method; and removing phosphorus from the wastewater by using ozone as an oxidant and calcium hypochlorite precipitation. According to the method and equipment for the standards-reaching treatment of the chemical nickel plating waste liquid, disclosed by the invention, the standards-reaching emission of nickel, phosphorus, COD and ammonia nitrogen can be simultaneously achieved.

The invention discloses a reverse osmosis membrane treating and recycling method for printing and dyeing wastewater. According to the method, adsorption, ultrafiltration membrane filtration, macroporous resin adsorption and reverse osmosis membrane separation are conducted on water discharged from a printing and dyeing wastewater treatment system, reverse osmosis membrane produced water is taken as high-quality water to be used by enterprises for cyclic utilization, and after advanced oxidation reaction, part of reverse osmosis membrane concentrated water is for up-to-standard release and the other part is adsorbed and then reused for rinsing. The method has the advantages that deep wastewater treatment for up-to-standard release and reusing are combined organically, the total reuse rate of printing and dyeing wastewater is over 80%, the problem of up-to-standard release of wastewater is solved, and cost is reduced greatly due to the remarkable increase of the water reuse rate; part of reverse osmosis membrane concentrated water is for up-to-standard release and the other part is reused after being treated, saltness of wastewater tends to be a stable value gradually and does not increase any more, and crash of a biological treatment system caused by non-stop increase of saltness is effectively avoided.

The invention relates to an up-to-standard treatment method and device for zinc-nickel alloy waste water; the method includes the following steps: the zinc-nickel alloy waste water is treated by a Fenton method, so as to carry out oxygenolysis of a part of organic pollutants in the waste water, to achieve the oxidative complex breaking effect and make complexation metal ions turned into a free state; the waste water treated through the Fenton method is treated by a chemical precipitation method, to make metal ions precipitated; and the waste water is subjected to heavy metal capture by ion exchange resin having the ability to adsorb the metal ions, so that the waste water stably reaches emission requirements.

The invention discloses a double-tower catalysis thermal-coupling reflux deamination method. The method comprises steps as follows: a pH conditioner and a composite deamination agent are added to an ammonia-nitrogen wastewater buffer pool, the mixture is preheated, one part of preheated ammonia-nitrogen wastewater is sent into a middle section of a thermal pressurizing tower to be fully contacted with hot steam which is produced by a reboiler and rises in the thermal pressurizing tower, ammonia-containing steam produced at the top of the thermal pressurizing tower is sent into a reboiler of a low-pressure coupling tower for condensation and rectification, then the ammonia-containing steam is sent into the lower part of the low-pressure coupling tower for rectification, and deaminated wastewater produced at the bottom of the thermal pressurizing tower is sent into the bottom in the low-pressure coupling tower; meanwhile, the other part of the preheated ammonia-nitrogen wastewater is sent into a middle section of the low-pressure coupling tower to be fully contacted with the ammonia-containing steam, and ammonia-containing steam is produced at the top of the low-pressure coupling tower. The NH3-N index of the deaminated wastewater can reach the national first-class discharge standard (15 ppm), industrial ammonia water with high quality can be recovered, energy consumption is greatly reduced, and compared with conventional distillation technologies, the method has the advantages that the energy-saving efficiency is higher than 40% and economic benefit and social benefit are very significant.

The invention relates to a saturated-reactor-process ammonia waste gas treatment device and a treatment process. The saturated-reactor-process ammonia waste gas treatment device comprises an ammonium sulfate saturator (1), a cooling device (2), a crystallization pump (3) and a crystallization tank (4), wherein the cooling device (2) is arranged on an ammonia waste gas inlet pipeline of the ammonium sulfate saturator (1); the ammonium sulfate saturator (1) takes carbon steel as a substrate material and vinyl fiber glass as an anti-corrosion lining; at a flashing part, the surface of the vinyl fiber glass is treated by using emery; no mother liquor allocation chamber is formed in the ammonium sulfate saturator (1); a pipeline allocator is arranged outside the ammonium sulfate saturator (1); a PO lining is arranged inside the pipeline allocator. When being adopted to treat an ammonia-contaminated waste gas and wastewater discharged in medicine production, the treatment process has the characteristics of reasonable process, advance technique, small investment and rapid effect taking, and the up-to-standard release of waste gases and wastewater is thoroughly realized.

The invention relates to the technical field of alcohol wastewater treatment, and provides a middling starch slurry and cassava fermentation alcohol wastewater treatment and thermoelectric fertilizer co-generation method. The method comprises the steps of 1 pretreatment of middling starch slurry and cassava fermentation alcohol wastewater, 2 anaerobic treatment for methane production, 3 methane conveying and thermoelectric co-generation, 4 wastewater up-to-standard discharge, 5 organic fertilizer processing. The method achieves the purposes that cassava and waste slurry generated when vital gluten and starch are generated by means of wheat flour are cooperatively adopted as raw materials, saccharomycetes is adopted for fermenting alcohol, and up-to-standard discharge of the generated wastewater is achieved; meanwhile, the thermoelectric fertilizer co-generation technology is developed, and recycling comprehensive utilization is achieved.

The invention relates to a dedusting system for boiler flue gas desulfurization, in particular to a dedusting system for flue gas ammonia desulfurization. The invention also relates to a method for applying the dedusting system in an ammonia desulfurization system. The dedusting system comprises a desulfurizing tower, a slurry pump, a centrifugal machine, a clear liquid pool, a clear liquid pump, an electric control system and an evaporation concentration system, wherein the desulfurizing tower, the slurry pump, the centrifugal machine and the clear liquid pump positioned in the clear liquid pool are sequentially connected in series through a pipeline to form a closed loop, the centrifugal machine is connected with the electric control system, the centrifugal machine is also provided with a mud outlet, and the pipeline between the clear liquid pump and the desulfurizing tower is connected with the evaporation concentration system. By the dedusting system and an application method of the dedusting system, provided by the invention, the problems that in the existing ammonia wet-type desulfurization system, due to desulfurizing circulating solution contains the large ash content, a pump valve, a nozzle, a piping system and the like are seriously worn and blocked, and the like can be effectively solved, so that the ammonia wet-type desulfurization system can safely and stably operate, and the sulfur dioxide emission can reach the standard for a long time.

The present invention discloses a saturator-method ammonia exhaust gas treatment device, structure of which comprises a total control power supply chassis, an ammonium sulfate saturator control device, a mother liquor crystallization control device, the ammonium sulfate saturator control device is provided with a top ammonium sulfate saturator device, a reaction control pipe, a bottom reaction control box, a sulfuric acid high-level storage device, and the mother liquor crystallization control device is provided with a crystallization pump work box, a control crystallization pump, and a crystallization cleaning work box. The treatment device has the beneficial effects that the utility model can be operated by a simple operation driving device, and is characterised in reasonable structure,advanced technology, low investment and quick effect, and can completely solve a problem of exhaust gas and waste water emissions.

The invention discloses a preparation method of a polyvinylidene fluoride composite separation membrane. Firstly, an alkalized polyvinylidene fluoride membrane is prepared and subjected to grafting modification with acrylamide and oxidation with sodium hypochlorite, and the treated membrane conducts chemical bonding action with graphite oxide and tetraethylenepentamine respectively; then a graphite oxide-polyvinylidene fluoride-tetraethylenepentamine separation membrane is prepared through the phase transfer technology; and finally an aromatic amide nanofiltration ultra-thin layer is formed onthe surface of the graphite oxide-polyvinylidene fluoride-tetraethylenepentamine separation membrane through an interfacial polymerization reaction, and the polyvinylidene fluoride composite separation membrane is prepared. The composite separation membrane prepared by the invention can effectively reject and remove high concentration of pollutants such as heavy metals, nitrates and phosphates inwastewater, the problem of up-to-standard discharge of water-soluble pollutants in the water body is solved, and the polyvinylidene fluoride composite separation membrane has a wide application prospect in the field of water treatment.