697results about How to "Achieve emission standards" patented technology

The invention relates to a comprehensive electroplating wastewater treatment method. The electroplating wastewater is divided into six brand-new classes, a chemical and biochemical combined process is adopted, a separate system drainage pipe network is adopted, the electroplating wastewater is divided into ink wastewater, complex wastewater, pretreatment wastewater, cyanogen-containing wastewater, chromium-containing wastewater and common electroplating wastewater, the six classes of wastewater respectively flows into respective underground adjusting tank through the pipe network, and is treated by respective process, and the effluent is discharged after reaching a standard. Because of the scientific water separating and stepwise pretreatment of a front-end chemical treatment part, different pollutants are respectively removed in different process sections according to characteristics, crossed enrichment and mutual reaction of the different pollutants are reduced to the greatest extent, and the pressure of microorganisms in the biochemical process is reduced. Treatment facilities for the six classes of wastewater are mutually connected and relatively dependent, and when inlet water quality fluctuates, a corresponding section is only required to be adjusted, the whole process is not influenced, the management is scientific and orderly, and operational risks are reduced.

A process for recovering the copper, Ni and noble metals from the sewage and dregs by the combination of wet method and fire method includes the wet process including extracting, Cu-Ni separation, removing Fe, extracting, and refining nickel carbonate, and the fire process including sintering and smelting to produce nickel matte and black copper. Its advantages are high recovery rate of Ni, Cu, Au, Ag and Pd, and no secondary pollution.

The invention discloses a method for commprehensively treating phosphorus-containing waste water. The method mainly comprises the steps of: classifying waste water with total phosphorus concentration being 20-10000mg/L generated in a factory; for different types of phosphorus-containing waste water, carrying out different combined pre-treatment of more than two of iron-carbon micro-electrolysis, oxidation, coagulating sedimentation, lime stone neutralization and the like; and afterwards, further carrying out biochemical treatment so that the waste water reaches the emission standard with TP (Total Phosphorus) being smaller than or equal to 0.5mg/L.

The invention relates to a waste salt resourceful treatment system which comprises a waste salt carbonization and pyrolysis system, a carbon-containing salt slag dissolving and filtering system and anevaporating and salt separating system in sequential connection, wherein the waste salt carbonization and pyrolysis system can carry out carbonization and pyrolysis treatment on waste salt I composedof sodium chloride, and sodium sulfate monomer salt or mixed waste salt and also can treat tail gas; the carbon-containing salt slag dissolving and filtering system can dissolve and filter the carbon-containing salt slag treated by the waste salt carbonization and pyrolysis system; and the evaporating and salt separating system can carry out evaporation and concentration, fractional crystallization and drying treatment on the strong brine treated by the carbon-containing salt slag dissolving and filtering system to obtain product salt. The waste salt resourceful treatment system takes industrial waste salt as the raw material, removes organic pollutant from waste salt and separates mixed inorganic salt to finally obtain an industrial second-grade salt product, so that recycling of waste salt is realized, and the flue gas generated during the production process is discharged after reaching the standard.

The invention discloses a method for preparing a manganese sulphate solution by leaching pyrolusite with sulfur dioxide gas. The method mainly comprises: pyrolusite and water are prepared into pyrolusite slurry with a liquid to solid ratio of between 5:1 and 1:1; the slurry, the sulfur dioxide gas and oxygen are continuously passed into a reactor provided with two stages of absorbing and leaching reaction chambers which are arranged and connected serially up and down; and absorbing and leaching reactions are carried out in the two absorbing and leaching reaction chambers sequentially at normal temperature, wherein each stage of absorbing and leaching reaction chamber is provided with a stirrer of no less than 5 kW for each cubic meter, the mass flow of the slurry is determined by the stoichiometric ratio of manganese dioxide required by the mass flow of the sulfur dioxide, and the amount of the added oxygen is determined by the pH values of reaction systems in the absorbing and leaching reaction chambers. Another invention applied by the applicant of the invention discloses a reactor for use in pyrolusite leaching. The reactor realizes stable and continuous production, achieves high sulfur and manganese resources recovery rate, meets tail gas exhaust standards and can effectively suppress the generation of MnS2O6 at the same time.

The invention relates to coal tar processing wastewater treatment method and system. The treatment method comprises materialization treatment comprising the following steps of: (1) removing free oil and emulsified oil which are contained in wastewater, filtering, regulating the pH value of the wastewater to 3-4, and then separating out depositions; (2) extracting and dephenolizing; (3) regulatingthe pH value of the dephenolized wastewater to 9-10, filtering, then carrying out steam stripping and deaminization by using steam, and besides, carrying out reextraction on extract phase containing phenol to respectively recover an extracting agent and phenate, and then recycling the extracting agent and decomposing the phenate to obtain crude phenol; and (4) cooling the deaminized wastewater, regulating the pH value to 7-8, and then filtering after adding a desulfurizing agent to remove sulfides. The water quality of the materialized wastewater achieves the requirement of a biochemical treatment system; meanwhile, the invention can recover a given amount of useful matter comprising the phenol, ammonia and the like and make the extracting agent recycled so that the economic benefit of wastewater treatment is improved.

The invention discloses a device and a method applied to thermal desorption treatment of mercury-contaminated soil. The device comprises a pretreatment unit, a charging unit, a fuel supply unit, a thermal desorption unit, a high-temperature dust removal unit, a condensate water treatment unit, a discharging unit, a tail gas cooling unit and a tail gas treatment unit, wherein the pretreatment unit is connected with the charging unit; the charging unit, the fuel supply unit, the discharging unit and the high-temperature dust removal unit are connected with the thermal desorption unit; the high-temperature dust removal unit is connected with the tail gas cooling unit; the tail gas cooling unit is connected with the tail gas treatment unit and the condensate water treatment unit; the condensate water treatment unit is connected with the discharging unit; the thermal desorption unit adopts a thermal screw conveyor. According to the device, the contaminants are indirectly heated, volatilized and separated out of the contaminated soil, so that the mercury in the mercury-contaminated soil can be effectively removed; meanwhile, the mercury in the tail gas can be recycled and desorbed by a hydrocyclone separation method; and the up-to-standard emission of the tail gas and the wastewater can be achieved.

The invention applies to provide a microbial deodorant which is a microbial colony composed of lactobacillus plantarum, bacillus subtilis, saccharomyces cerevisiae and rhodopseudomonas palustris, wherein counted by 108CFU (colony-forming unit)/ml as a unit, the total viable count is not less than 10, the lactobacillus plantarum count is not less than 3, the saccharomyces cerevisiae count is not less than 3, the rhodopseudomonas palustris count is not less than 2 and the bacillus subtilis count is not less than 2. The microbial deodorant applied by the invention has stronger zymolysis ability under both aerobic and anaerobic conditions, and the beneficial bacteria mutually play a role in inhibiting the growth of putrefactive bacteria and interrupting the putrefactive process, secrete organic acid while reproducing quickly, and generate antioxidation substances, thus converting odorous substances such as NH3, H2S, indoles and the like into non-odorous substances.

The invention discloses a hydrodynamic-cavitation enhanced water treating apparatus, comprising a pretreatment unit, an enhanced cavitation formation device, a water feedback cycle treatment loop, a multi-parameter water quality detection/display system and a smart automatic control system, wherein the multi-parameter water quality detection/display system is composed of a pressure sensor, a redox potential sensor, a flowmeter, a pH sensor, a conductivity sensor, a dissolved oxygen sensor, a chemical oxygen demand sensor, a total organic carbon sensor, a temperature sensor and an LED (Light-Emitting Diode) touch display screen, all of which are orderly mounted in a water outlet pipeline; the two ends of the water feedback cycle treatment loop are connected to the front section of a water outlet electromagnetic valve and the front end of a water pump of a water inlet pipeline, respectively; and the water outlet electromagnetic valve and a cycle-treatment electromagnetic valve are connected to a programmable controller, respectively. The hydrodynamic-cavitation enhanced water treating apparatus is used for water treatment and purification, and realizes online detection and display of a plurality of water quality parameters and operating parameters therein and automatic control on the operation thereof by means of a plurality of sensors.

The invention provides a gas-phase oxidation/liquid-phase reduction method for absorbing and removing NOx. The method utilizes O2 in waste gases as an oxidizer; after be processed by non-catalyst oxidization or catalyzed oxidation by modified active carbon materials, NOx waste gas with low oxidization degree reacts with an alkaline reducing solution fully to remove NOx. After going through multi-grade oxidization, reduction and absorption, the NOx in waste gases can fully meet the emission standard. The method of the invention has the advantages of being able to realize up-to-standard emission of NOx waste gas with low oxidization degree, simple technique, small cost and high removing efficiency.

The invention discloses a cylinder filter, and belongs to the technical field of rainwater treatment devices. The cylinder filter comprises an outer cylinder with water passing holes and a collecting pipe with water passing holes, wherein the outer cylinder and the collectingpipe are coaxially arranged. The bottom end of the outer cylinder and the bottom end of the collecting pipe are detachably connected to the base. A cover plate is detachably connected to the top end of the outer cylinder. A handle is fixedly connected to the cover plate. The space between the outer cylinder and the collecting pipe is filled with a filtering medium for filtering rainwater. The diameter of the water passing holes in the outer cylinder and the diameter of the water passing holes in the collecting pipe are both smaller than the grain diameter of the filtering medium. The cylinder filter is stable and reliable in structure and can be conveniently mounted and dismounted on site, meanwhile the filtering medium can be conveniently replaced, the workload is reduced, and the efficiency is improved.

The invention discloses an industrial exhaust gas desulfurizer. The device comprises a desulfurizing tower, a phosphoric ore pulp circulating tank, a washing tower, a setting tank and a clear liquid tank, wherein an inlet of the desulfurizing tower is provided with an induced draft fan, a spraying system of the desulfurizing tower is connected with the phosphoric ore pulp circulating tank through a phosphoric ore pulp circulating pump, and the bottom of the desulfurizing tower is provided with an outlet which is communicated with the phosphoric ore pulp circulating tank; an outlet of the top of the desulfurizing tower is communicated with the washing tower by a pipeline, the spraying system of the washing tower is connected with the clear liquid tank through a washing tower circulating pump, the bottom of the washing tower is provided with an outlet which is communicated with the setting tank, an outlet of the bottom of the setting tank is communicated with the phosphoric ore pulp circulating tank through a slush pump, and a clear liquid outlet of the setting tank is connected with the clear liquid tank. The sulfuric acid tail gas which is subjected to desulfurization by the device contains dioxo sulphur content being smaller than 100ppm, and can meet the new standard in China. In addition, due to the adoption of the device, the three wastes can not be generated in the whole process, a sulphur resource is fully utilized, a phosphorus resource is not damaged, and the part industrial wastewater is also consumed.

The invention discloses an integrated device for remediation on volatile pollution soil. The integrated device comprises a soil adding and discharging system, an oxidation system, a neutralization system, an adsorption system and an air discharging system in sequence from bottom to top, wherein an inclined soil discharging bucket is positioned at the bottommost part of a tank body; an upper end opening in the inclined soil discharging bucket is provided with a baffle plate for sealing the inclined soil discharging bucket; two ends of a gas collecting tube are opened, the gas collecting tube is fixed in the tank body through a bracket and a plurality of gas collecting holes are formed in the wall of the gas collecting tube; a soil adding hole is formed in the tank body; a gas feed hole is formed in the tank body between the soil adding hole and the baffle plate; the oxidation system comprises an ozone oxidation water storage tank, an aeration disk in the water storage tank, an ozone generation device communicated with the aeration disk, and an ozone oxidation water spraying device communicated with the ozone oxidation water storage tank through a circulating pump I; the neutralization system comprises a neutralization solution tank, and a neutralization solution spraying device communicated with the neutralization solution tank through a circulating pump II; the air discharging system comprises an opening in the top of the tank body and an exhaust fan in the opening.

The invention provides a method for treating 2,4,6-trinitrotoluene (TNT for short) waste water. In the invention, waste water is mainly treated by immobilized microorganisms, an anaerobic biological filter (I-AF) and immobilized microorganisms and a biological aerated filter (I-BAF), wherein the waste water enters a collecting tank, is lifted by a pump to enter a regulating tank and enters a setting tank after being homogenized and neutralized by the regulating tank so as to remove suspended substances (SS) in the waste water; the effluent is discharged after reaching standards after enteringthree-stage I-AF and five-stage I-BAF for further treatment. The specific steps of the method are shown in the specification. The invention has the advantages that biological treatment adopts an immobilized microorganism technology, which improves the poison resistance of the microorganisms, realizes the high-efficiency removal on toxic and harmful substances of nitrobenzene and the like, reducesthe treatment cost and realizes the standard-reaching discharge of the waste water. The application of the invention is not only suitable for treating the TNT waste water but also is applied to treating nitrobenzene and aniline contained pollutants and organic waste water thereof.

The disclosed preparation method for charcoal comprising: crushing the solid waste from extracted traditional drug or plant to extrude into bar-form; loading the product into retort for charring reaction with three stages for 10-30min at 120Deg, 200-400min at 120-350Deg and 100-300min at 350-450Deg, respectively. Wherein, firing the exhaust gas in combustion chamber to provide heat source. This invention has yield rate as 40-55% with low energy consumption and little pollution.

The invention discloses a treatment method of heavy metals in desulfurization waste water, and belongs to the technical field of waste water treatment. A combination method of chemical precipitation and physical adsorption treatment is adopted to remove the heavy metals in the desulfurization waste water. The chemical precipitation method uses a ferrite precipitation method that a process condition is controlled by adding ferric and ferrous salts into desulfurization slurry, so that various metal ions such as Cd, Pb, Hg, Cu, Zn, Cr and Ni in the waste water form an insoluble composite ferrite; after aging for a period of time, a solid-liquid separation means is used to achieve the object of removing the heavy metal ions; a natural adsorbent is used for adsorbing the residual heavy metals in the desulfurization waste water, therefore the discharge standard of the heavy metal ions in the desulfurization waste water is achieved. The method has the advantages of simple process, good sediment stability, high removal efficiency of heavy metals and good environmental benefits, and effectively solves the secondary pollution problem of heavy metals.

The process of treating waste water containing metal complex includes: regulating pH value to 2-4 and adding H2O2, contacting with iron powder in a fluidized bed reactor to produce displacement reaction and complex eliminating reaction, adding alkali in a deposition tank one deposit metal ion, and separating supernatant and the lower precipitate. The process can prevent the aggregation and deactivation of iron powder in the reaction, and has greatly raised reaction efficiency, low cost and high waste water treating effect.

The invention relates to a resource recycle method for waste tubes, and the technique method is as follows: pouring the waste tubes into a crusher for crushing under the negative pressure; delivering the mixture after crushing into a material receiving box; sucking the waste gas into a condensing system by an exhaust fan arranged on the top of the material receiving box for separating mercury and fluorescent powder; wherein, mercury can be recycled by a vacuum heater; the glass after crushing and the metal materials are sent to a magnetic separator for separating the glass from the metal; the separated metal is sent to a washing machine for recycling the metal by third-stage reverse current spraying washing. The invention can effectively recycle the fluorescent powder, mercury and metal, thus realizing up-to-standard discharge of waste water, waste liquid and waste gas.

The invention discloses a treatment method for waste incineration power plant leachate and a device thereof. The waste leachate is put into a raw water regulation pool, a coagulation reaction system, a first-stage UBF reactor, a first-stage UBF reactor effluent middle pool, a second-stage UBF reactor, a second-stage UBF reactor effluent middle pool, a denitrification pool, a nitration pool, a built-in MBR system, and a nanofiltration system for processing. According to the invention, the UBF reactor effluent middle pools are arranged behind the UBF reactors for mud-water separation and backflow after the UBF reactor effluent, guaranteeing the mud concentration in the UBF reactors and treatment effeciency. Using a built-in MBR membrane module placed in a biochemical pool helps to reduce floor space and lower energy consumption. The use of physical and chemical, biochemical, and membrane filtration technology association for the direct treatment of waste leachate can reach recycling with zero emission.

The invention relates to a coking wastewater treatment device which comprises a flocculation reaction tank, wherein the flocculation reaction tank is connected with a flocculation settling pond, the flocculation settling tank is connected with a sand filter, and the sand filter is connected with an active carbon filter. A coking wastewater posttreatment method comprises the steps of: adding an efficient composite flocculating agent, a polymer coagulant aid and a mineral powder absorbing agent into the coking wastewater subjected to common treatment; regulating the pH value to be 8-9 with alkali, wherein the flocculation reaction settling time is 1-2.5h; and then carrying out sand leaching and active carbon filtration, wherein the effluent quality fully reaches the standard for emission or recycling. The COD (Chemical Oxygen Demand), the total phenol, the ammonia nitrogen, SS (Suspended Substances) and the chromaticity in the coking wastewater subjected to the treatment with the method are respectively reduced by above 80 percent, 90 percent, 60 percent, 90 percent and 95 percent; and by treating the coking wastewater according to the invention, the purposes of good effect, simple operation and convenience in management are achieved.

The invention discloses a method for treating artificial wetland breeding wastewater by integration of straw, biochar and organism. According to the method, breeding wastewater passes an anaerobic fermentation tank, three substrate tanks and four wetland tanks in sequence; a substrate channel is arranged between the anaerobic fermentation tank and the first substrate tank, between two adjacent substrate tanks, as well as between the third substrate tank and the first wetland tank; straw is laid in the substrate channels and the substrate tanks; wild plants are added onto the straw; a water blocking drop water dam is arranged at the water outlet of each substrate tank; the wetland tanks are surrounded by ridges; two adjacent wetland tanks are separated through one ridge; overflow openings of which the cross sections are in the shape of an inverted trapezoid are formed in the upper end surfaces of two ridges of each wetland tank; myriophyllum verticillatum is added into each wetland tank; a biochar layer is arranged in front of the overflow opening, near discharged water, of the last wetland tank. According to the method for treating artificial wetland breeding wastewater by integration of straw, biochar and organism, the water quality of the end discharged water is greatly superior to the water pollutant discharge standard of the national breeding industry.

An ammonia spraying amount controlling method for an SNCR (selective no catalytic reduction) flue gas denitrating system for cement manufacturing includes the steps of firstly, arranging at least two layers of ammonia spraying areas in a cement kiln decomposing furnace; secondly, arranging a temperature sensor, a glue gas flow detecting sensor and a first NOx concentration detecting sensor at an entrance of the ammonia spraying areas, and arranging a second NOx concentration detecting sensor and an NH3 concentration detecting sensor at an exit of the cement kiln decomposing furnace; thirdly, by the aid of an ammonia spraying amount controlling system which is provided with an ammonia spraying amount BP (back propagation) neural-network predicting model, giving a total ammonia spraying amount and an ammonia spraying amount proportion between each two layers of the ammonia spraying areas via the ammonia spraying amount BP neural-network predicting model according to received flue gas temperature information, flue gas flow information and concentration information of NOx in flue gas at an entrance of the cement kiln decomposing furnace and concentration information of the NOx in the flue gas and NH3 concentration information at the exit of the cement kiln decomposing furnace, and controlling states of a total ammonia flow adjusting valve and branch ammonia flow adjusting valves according to the total ammonia spraying amount and the ammonia spraying amount proportions among the layers of the ammonia spraying areas to achieve real-time controlling of the ammonia spraying amount.

The invention discloses a ship exhaust gas desulfurization wash water treatment process based on a sodium alkali method. The process comprises steps of neutralization-oxidization-conditioning, air flotation-flotation selection solid and liquid separation, filtration purification and the like. The invention also discloses a ship exhaust gas desulfurization wash water treatment system based on the sodium alkali method. By the abovementioned processing steps, the process and the system can be used for implementing oxidization of sulfite in wash water, regulation of the pH value, flocculation and air flotation of particles and impurities and adsorption of fine-dispersed emulsified oil taken by the wash water so that the quality of the discharged ship wash water is ensured to satisfy the requirements of IMO on indexes such as emission pH, PAH, turbidity, temperature and the like of the wash water of a ship exhaust gas cleaning system.