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

The invention relates to the field of industrial waste water treatment, particularly relates to and discloses a method for concentrating CMP (chemi-mechanical pulp) waste liquid by using a membrane process. The method comprises the following steps: (1) heat exchange for cooling; (2) microfiltration treatment; (3) ultrafiltration pretreatment; and (4) membrane preconcentration. In the CMP waste liquid treatment method provided by the invention, the CMP waste liquid with initial concentration by mass percentage of 1-2% is concentrated to 7-10% by a membrane concentration system, and penetrationliquid can be directly discharged or reused. Through adopting an immersed ultrafiltration and reverse-osmosis / nanofiltration preconcentration process and a series of membrane pollution control techniques, the smoothly continuous operation of the system can be ensured, thereby realizing the zero discharge of the CMP waste liquid. By using the method provided by the invention, the problem that the CMP waste liquid is treated to meet the States discharge standards can be completely solved; and compared with a direct evaporation and concentration mode, the method is characterized by adopting preconcentration of the membrane system, the energy consumption is greatly reduced, and a good deal of produced water can be recycled, therefore, the method provided by the invention has good economic andsocial benefits.

The invention provides a resource treatment scheme for epichlorohydrin wastewater, which can effectively separate water and organic matter through the processes of stripping, oil-water stratification, filtration, reverse osmosis membrane device concentration, resin adsorption, and resin regeneration, and realize the recycling of wastewater. Oxychloropropane and monochloropropanediol are recovered, and the effluent is discharged up to the standard, with broad application prospects.

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.

A process for treating the waste emulsion with the used acid generated by pickling includes such steps as adding the said used acid to the waste emulsion which stirring, laying aside for 18-36 hr, separating upper oil layer from water, adding calcium carbonate to the water, laying aside for 2-12 hr, regulate adding lime water to pH to 7-9, laying aside for 18-36 hr, and draining off the upper water layer. Its advantages are low cost and using the recovered oil as fuel of boiler.

The present invention provides a combined biological bed treatment process for waste water with low carbon source, high ammonia nitrogen and high organic phosphorus, including five steps of raw water adjustment, iron-carbon-Nefton treatment, struvite treatment, A2O treatment, and Fenton advanced treatment. The first flocculant and the second flocculant are respectively added in the iron-carbon-Nefton treatment step and the Fenton advanced treatment step; the present invention adopts the low-carbon source high ammonia nitrogen high organic phosphorus wastewater combined biological bed treatment process as the low-carbon source high The main treatment method of ammonia nitrogen and high phosphorus wastewater greatly improves the efficiency of biochemical treatment, solves the problem of low-carbon source high ammonia nitrogen and high organic phosphorus wastewater discharge standards, and has good social and economic benefits; Nefenton, iron-carbon micro-electrolysis The combination with Fenton can improve the Fenton effect, reduce operating costs and operating workload.

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 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 discloses a circulating fluidized bed boiler oxygen-enriched combustion dry desulphurization system and method. The dry desulphurization system comprises a hearth, a coal feeding hole, a primary air chamber, an air distribution device, a high-temperature cyclone separator, a tail flue, a coal economizer and a return device, wherein a desulfurizer feeding hole is formed in the coal feeding hole or / and in a return leg of the return device; a medium-temperature cyclone separator is arranged on the tail flue on the rear of the coal economizer; a return bin of the medium-temperature cyclone separator is connected with the hearth through a pipeline; a central drum of the medium-temperature cyclone separator is connected with the primary air chamber through an air hose and a primary air hose and is connected with the hearth through the air hose and a secondary air hose; an induced draft fan is arranged on the air hose; an oxygen injection device is arranged on at least one of the air hose, the primary air hose and the second air hose. The circulating fluidized bed boiler oxygen-enriched combustion dry desulphurization system can effectively solve the SOx up-to-standard discharge problem of a boiler, increase the utilization ratio of limestone, reduce consumption of limestone, improve desulphurization efficiency, realize efficient and economical desulphurization in the boiler as well as CO2 enrichment, facilitate compression, purification, utilization, sealing and storage of CO2, and meet environmental protection demand.

The invention relates to a catalytic wet oxidation pretreatment method of glyphosate production wastewater, comprises the following steps: firstly regulating pH value to be more than 8 and less than 10, adding a multi-component homogeneous catalyst and carrying out oxidative degradation on pollutants in wastewater for 0.3-2 hours by using a continuous catalytic wet oxidation device with air as an oxidizing agent at the reaction temperature of 210-230 DEG.C and the reaction pressure of 2-4MPa, wherein the catalyst is a soluble transition metal salt mixture. By adopting the method for treating the glyphosate production wastewater, the organic phosphorus conversion rate is high, the COD (chemical oxygen demand) removal rate is high, the biodegradability of the wastewater can be improved, and the secondary pollution is avoided. The method has the advantages that the catalyst activity is high, low in cost and easy to get, reaction conditions are relatively mild, and continuous operation is easily implemented; the glyphosate production wastewater can be discharged in standard through the combined process of catalytic wet oxidation pretreatment-routine technical dephosphorization and deamination-biochemistry, and the industrialized application prospect is great.

The invention discloses a waste gas and waste water treating system comprising a circularly collected flue gas treatment system containing a magnesium oxide absorption liquid, an acid water neutralizing treatment system and an electrochemical treatment system, wherein an inlet of the circularly collected flue gas treatment system is connected with a fan for delivering smelting circularly collected flue gas, a waste liquor outlet of the circularly collected flue gas treatment system is communicated with an inlet of the acid water neutralizing treatment system through a pipeline provided with an absorption liquid delivery pump, a neutralization liquid discharge port of the acid water neutralizing treatment system is connected with an input end of a neutralization liquid delivery pump, an output end of the neutralization liquid delivery pump is connected with two pipelines, one pipeline is introduced into the circularly collected flue gas treatment system, and the other is introduced into the electrochemical treatment system. Acid waste water is neutralized by use of effective components in the absorption liquid and the magnesium oxide solution, one part of waste water enters the prepared magnesium oxide solution for smelting circularly collected flue gas, the water discharge of the system is reduced, the other part enters the electrochemical treatment system for deep treatment and is discharged after reaching the standard, and up-to-standard emission or recycling of the smelting circularly collected flue gas and the acid waste water is realized.