7198 results about "Sewage discharge" patented technology

The invention provides a method for treating fracturing waste fluid in an oil-gas field, belonging to the oil-gas field waste fluid treatment technology, which overcomes the problems existed in other methods. The process steps of the method are as follows: the water quality achieves a recirculation standard or accords with the II grade discharge standard of the integrated sewage discharge standard GB8978-1996, through technical treatments of raw water (pH) adjustment, H2O2 / Fe<2+> catalytic oxidation, chemical precipitation, enhanced flocculation and sedimentation, fine filter and adsorption filtration, and system settling sludge, then the settled sludge is subject to filter pressing and dehydrating, press filtrate returns to the front end for after-treatment, and mud cake is desiccated and manufactured into bricks for application or is treated through using the incinerating treatment technology. The method is an effective method for treating the fracturing waste fluid in the oil-gas field.

The invention provides a desulphurization method for acid gas, which comprises the following steps: firstly, carrying out heat combustion reaction on the acid gas and fuel in a combustion chamber; secondly, carrying out catalytic reduction reaction on the obtained combustion product; thirdly, combusting tail gas obtained by the catalytic reduction reaction; and fourthly, carrying out ammonia elution on sulfur dioxide in gas obtained after combustion to obtain ammonium sulphate. The desulphurization combined process for the acid gas has no strict requirement on the Claus combustion, does not need multistage Claus reaction, and even does not control the Claus reaction strictly; and wastewater subjected to ammonia washing in the acid gas containing ammonia is not discharged to a sewage treatment center of a factory, and a fussy device is not needed to add for ammonium refining and recovery. The method can balance the ammonia and the Clause reaction according to the yield of the ammonium sulphate, and does not have sewage discharge; heat required by the process can be balanced through by-product steam, so that the method greatly saves the investment and operation cost, and has short flow and simple operation; and the gas emission can be far lower than the national emission standard.

The invention discloses a composition used in a scale-inhibition corrosion inhibitor, a scale-inhibition corrosion inhibitor, and an application thereof. The composition used in the scale-inhibition corrosion inhibitor comprises cyclodextrin and / or a cyclodextrin derivative, a carboxylic-acid-group-containing homopolymer, a sulfonic-acid-group-containing copolymer, and selectively hydroxycarboxylic acid with a weight ratio of 1:0.2-20:0.04-15:0.2-30:0-20. The scale-inhibition corrosion inhibitor provided by the invention is environment-friendly. According to the invention, the application of phosphorus-containing compound or non-renewable molybdate or tungstate is prevented, such that the scale-inhibition corrosion inhibitor is phosphorus-free and nitrogen-free. The scale-inhibition corrosion inhibitor has high tolerance to calcium and alkali, resistance to corrosion of high-concentration chloride ion and sulfate ion, and wide applicability to water quality. Therefore, technical condition is provided for operation of circulation water under high concentration multiple and for reducing sewage discharge. The scale-inhibition corrosion inhibitor provided by the invention has excellent scale inhibition and corrosion inhibition performances in circulation water system application. With the scale-inhibition corrosion inhibitor, a dose is low, scale-inhibition treatment process is simple and substantial effect is provided. The scale-inhibition corrosion inhibitor is suitable for popularization.

The invention belongs to the technical field of sewage treatment, and relates to a rural domestic sewage biological treatment system, particularly a rural domestic sewage biological treatment system which has the advantages of low capital construction and operating cost, small occupied room, convenient operation and management, high sewage treatment efficiency and discharge after reaching the standard. The rural domestic sewage biological treatment system provided by the invention is connected with a rural domestic sewage discharge pipeline. The rural domestic sewage biological treatment system is characterized by comprising an ecological open septic tank, a microaeration oxidation pond, a suspended substance biological filter, an artificial wetland and a scenic pond, wherein the ecological open septic tank, microaeration oxidation pond, suspended substance biological filter, artificial wetland and scenic pond are arranged from high to low and communicated through a pipeline or ditch; the sewage flows under the gravity; and the water inlet of the ecological open septic tank is connected with the rural domestic sewage discharge pipeline. The rural domestic sewage biological treatment system provided by the invention solves the problem of large occupied area, high investment and maintenance cost and the like in other rural sewage treatment methods.

The invention relates to a method for treating wastewater and discloses a method for treating wastewater in an automobile manufacturing plant. A method of pretreatment, two-stage physicochemical treatment, biochemical treatment and advanced treatment is adopted to treat wastewater. The method for treating wastewater in the automobile manufacturing plant has little investment, small occupied area and low operating cost and has good integrated treatment effect on industrial wastewater and domestic sewage discharged from the automobile manufacturing plant.

The invention relates to a photochemical colorimetric sensor array, and concretely relates to a method for detecting various heavy metal ions with the photochemical colorimetric sensor array. The method comprises the following steps: 1, fixing several heavy metal ion indicators on a porous sensitive film to form an array; 2, carrying out multichannel analysis by means of a plurality of single channel flow cell systems which are mutually independent with each other; and 3, rapidly determining whether contents of various trace heavy metal ions of Hg, Pb, Cd, Ag, As, Ni, Cu, Zn and the like in water exceed sewage discharge standards prescribed by national standards within 10min. According to the sensor array, a color imaging device acquires changes of colors before and after the exposure of the indicators in various different heavy metal ions and constructs RGB (red, green, blue) spectrum values corresponding with the color changes into the "fingerprint" of each heavy metal ions. In the sample test process, mathematical statistic methods of cluster analysis, main component analysis and the like are adopted to contrast the fingerprint of the sample with a "fingerprint" database, so unknown heavy metal ions can be qualitatively or semi-quantitatively analyzed.

The invention provides a boiler system. A monitoring diagnosis controller calculates water loss of a boiler by calculating the ratio of the sum of the steam mass, the change mass of drum water and the sewage discharge mass to the mass of water input into the boiler. The monitoring diagnosis controller is in data connection with a cloud server, so that monitored data are transmitted to a cloud server; the cloud server is connected with a client side, and the client side can obtain the monitored data by means of the cloud server. By means of the client side, the operation condition of water loss of the boiler can be mastered in time, and by means of the client side, the situation that due to water loss of the boiler, a large amount of heat is wasted can be avoided in time.

The invention relates to a paint mist coagulant. The paint mist coagulant has good anti-adhesion and coagulation effects on water-soluble and fat-soluble paints and is particularly applied to circulating water treatment of a wet paint mist removing system. The paint mist coagulant comprises an anti-adhesion agent A, a flotation agent B and a regulator C which are used simultaneously, wherein the anti-adhesion agent A is formed by combining water-soluble quaternary ammonium cationic polymer, amphoteric metal salt or polymer of the amphoteric metal salt, and a surfactant, has high electrical neutralization property, can quickly neutralize paint particle charges, and coats paint particles to make the viscosity of the paint particles lost; the flotation agent B is anionic polymer with the molecular weight of 8,000,000 to 25,000,000, has a strong coagulation effect, and can aggregate the paint particles of which the viscosity is lost; and the regulator C is used for regulating the pH of circulating water, controls the pH value of the circulating water to be between 7 and 10 commonly, and has small using amount. The paint mist coagulant is low in price, the process is stable, the total sewage discharge amount is small, and continuous production can be ensured.

The invention provides a detector for detecting total organic carbon (TOC) in sewage, mainly comprising a sample pool capable of being transmitted by ultraviolet rays, a UV optical splitter and a data processor of the organic carbon. The detector is characterized in that UV can emit 240-450nm of UV beams, and a neon lamp is used as a UV light source; the optical splitter is a UV reflective blazed grating, and the light strength of the light beams at each wavelength is detected by a linear array UV CCD (Charged Coupled Device); and the TOC value is determined according to the relationship between the absorbance at the feature wavelength and the TOC content. As known from the scheme, the detector has low cost and good stability and is capable of fully realizing automation and accurately measuring the TOC value so as to comprehensively reflect the pollution degree of the organic matter in the water. Thus, the detector has important help and realistic significance for monitoring and measuring the sewage discharge and the water pollution on the ground surface.

The invention discloses a three-phase separation and waste water purification standard treatment device of kitchen waste including 'waste oil', solid waste and kitchen waste water. The three-phase separation and waste purification standard treatment device of the kitchen waste including the 'waste oil', the solid waste and the kitchen waste water is mainly composed of a shell body, a solid-liquid separation chamber, a filtering bag with meshes, a liquid level displayer, an oil-water interface detector, a numerical control electric valve which discharges the 'waste oil', a flowmeter of the 'waste oil', a collection tank of the 'waste oil', a blower, an air heating device, a filtering tank, a drug adding tank and the like. According to the three-phase separation and waste water purification standard treatment device of the kitchen waste including the 'waste oil', the solid waste and the kitchen waste water, oil and water separation and waste water purification are carried out in the same device, an equipment structure is simplified, the water quality after being purified is in line with each indicator of 'water quality standard of sewage discharged into the city sewer' (CJ3082-1999), The three-phase separation and waste purification standard treatment device of the kitchen waste including the 'waste oil', the solid waste and the kitchen waste water has the advantages that the size is small, the investment is low, either manual or automatic operation is available and the like, and obvious creativity, novelty and good industrial applicability are provided.

The invention discloses an advanced treatment method for fracturing flow-back fluid, belongs to the field of water treatment of the development of oil and gas fields, and particularly relates to an advanced treatment method for the fracturing flow-back fluid generated during the operation of the oil and gas fields. The treatment method for the fracturing flow-back fluid, which has high effect and continuous treatment process, is provided to solve the problems that the treatment effect is lower, the continuous treatment cannot be performed, and the cost is higher existing in the prior art. The method comprises the following steps of: pre-oxidizing waste liquor with the pH value of between 8 and 12, adding a coagulant and performing gel breaking treatment and adding a Fenton reagent and treating, and performing secondary coagulation and oxidization treatment. In the method, through homogeneous and heterogeneous catalysis reactions, the treatment cost is reduced, and the removal rate of organic substances is also high; and chemical oxygen demand (COD) of effluent can meet the national sewage discharge standard.

The invention relates to a method for treating salt-containing sewage. The pH value of the salt-containing sewage is adjusted to between 8 and 12, the salt-containing sewage is biochemically treated by an activated sludge process, the effluent after the activated sludge process treatment is treated by an ozone-catalytic oxidation process adopting a solid catalyst, and the effluent after the ozone-catalytic oxidation process treatment is discharged through a biofilter; and in the ozone-catalytic oxidation process adopting the solid catalyst, the solid catalyst is granular activated carbon loaded with an active component which is one or more of tin, copper, manganese, titanium, cobalt, vanadium and nickel. The method can effectively purify the sewage which has high salt content and is refractory to biodegrade, and the effluent after treatment has the COD of less than or equal to 50 mg / L and the NH3-N of less than or equal to 8 mg / L, so that the strict sewage discharge standard of developed regions is met. The method has the advantages of simple treatment process, no need of sewage dilution, clean and clear effluent after treatment and realization of direct standard discharge.

Disclosed is a floor scrubber with a drying function. A chassis of the floor scrubber is provided with at least one scrubbing disc, each scrubbing disc is provided with a suction port in the middle, at least one of bristles, scrubbing pieces or strips is arranged on the scrubbing discs in a centripetal rotating manner, and the suction ports are directly communicated with an impeller throat through a suction passage. The floor scrubber comprises a watering mechanism composed of a clean water tank, a water pump and sprayers, and a sewage collection mechanism composed of a sewage collection trough and a sewage tank, wherein the sewage collection trough is arranged in the periphery of the impeller. The watering mechanism is in charge of watering, the scrubbing discs are in charge of scrubbing and driving sewage to the suction ports in the middle, the impeller generates negative pressure to suck the sewage in, the sewage collection mechanism is used for collecting sewage sprayed by the impeller. Airflow with the sewage does not need to pass a filter screen before entering the impeller, and the sewage discharged by the impeller is discharged without passing a narrow passage.

The invention relates to the field of rainwater closure technologies, in particular to a rainwater closure system. The rainwater closure system is characterized in that an electronic-control constant-flow gate with constant water flow is arranged in a sewage disposal pool, a hydraulic automatic gate is arranged between a buffer pool and an initial rain regulating storage pool, a water inlet of the hydraulic automatic gate is higher than the elevation of the bottom of a sewage pipe, a hydraulic-drive downward-opening type weir gate is arranged in a drain channel, and a gate of the hydraulic-drive downward-opening type weir gate can rise along with rise of the level of natural water. The rainwater closure system has the advantages that the hydraulic-drive downward-opening type weir gate is arranged between a closure well and the natural water, the gate can rise by equal amplitude under the control when the level of the natural water rises, and accordingly the natural water can be effectively prevented from flowing backwards.

Relating to the technical field of renewable energy, the invention specifically relates to a method for producing biogas and organic fertilizers with straw. The method of the invention comprises the steps of: (1) straw pretreatment; (2) straw composting; (3) anaerobic fermentation; and (4) fermentation product utilization. The method of the invention substantially improves the degradation rate of straw and gas output. Meanwhile, pretreatment by a composite bacterial agent can stabilize the pH value of a fermentation system, and is in favor of the normal occurrence of anaerobic fermentation, so that the content of methane in biogas can be raised. The method in the invention greatly saves cost, almost has no sewage discharge, and improves the utilization rate of renewable energy. The biogas produced by anaerobic fermentation of crop straw can be used as a resident cooking fuel or for power generation after treatment by the purification procedures of desulphurization and dehydration. On the other hand, the residue generated from anaerobic fermentation of straw can be separated into a biogas residue and biogas slurry that are then prepared into solid and liquid organic fertilizers, which are easy for crops to adsorb. Therefore, the comprehensive utilization rate of straw resources can be substantially enhanced.

The invention provides a method for repairing drainage pipeline without water supply suspended, which comprises the following steps of: site survey; pipeline cleaning; endoscope check for pipeline; local processing for ends of the drainage pipeline; manufacturing of a complex fiber hose and waterproof films; preparation of resin; impregnation of the complex fiber hose with resin mixture; positioning and installation of the resin liner hose; pressure maintaining curing by water filling; processing of liner end tip; and acceptance and operation of the pipeline with water supply. The method has the advantage that: on the basis of the sufficient utilization of upstream and downstream inspection shafts, repair for the drainage pipeline is performed with no excavation completely. With the help of the characteristics of the liner hose, irregular pipelines, such as round, arc, square and the like, can be repaired. Sewage discharge and repair are completed inside the pipeline while no influence is applied to traffic and environment. Natural curing of the resin liner can save not only energy, but also fund, and owing to smooth surface of the liner, flow quantity is not impacted. Tough crosslinker is formed as organic compound of crosslinker after curing and includes quite stable chemical bonds in case of no ultraviolet, so the service life can reach over 50 years.

A sewage treatment system for a breeding system able to guide sewage out of the breeding system to be purified and fed back to breeding ponds for reusing, it can be applied for one breeding pond or applied simultaneously for multiple breeding ponds, and it comprises: a purifying tank, at least a dirt discharging tube to lead sewage in the breeding ponds into a purifying tank; and at least a water take-in tube for feeding purified sewage from the purifying tank back to the breeding ponds. Wherein each dirt discharging tube has a dirt collecting portion; by multiple deposition and purification treatments on the sewage in the breeding ponds with the dirt discharging tubes and the purifying tank, the quality of water in the breeding system can be elevated, and environment pollution during breeding can be effectively reduced.

The invention relates to a device and a method for treating tail gas from sludge incineration through a semidry method, belonging to the field of solid wastes. The incineration tail gas passes through a semidry deacidification tower, thus the removing efficiency can reach about 90%, the use amount of chemicals is less, and sewage discharge is avoided; a flue in front of an expanded reactor is provided with a lime powder inlet, and the lime powder and the acid gas in the flue gas are subjected to full chemical reaction, thus the residue acid gas is removed; activated carbon serving as an adsorbent is injected, thus the removal rate of heavy metal and dioxin is further increased; an efficient bag filter is added to collect the Ca(OH)2 and powder of incomplete reaction, thus the removal rates of the heavy metal, dioxin and acid gas in the powder are effectively improved, the removal rate of the heavy metal (except mercury) reaches 99%, the emission of various pollutants can meet the environmental requirements, and the secondary pollution caused by incineration of the tail gas to the environment can be effectively solved.

The invention discloses an indoor industrial penaeus vannamei culture device which comprises a plurality of culture ponds, a water inlet pipe and a culture water circulation system, wherein the culture water circulation system comprises a sedimentation pond, a floatation pond and a biological filter pond; the floatation pond is internally provided with an aerobiotic device, an aeration device and a foam sewage discharge device; the foam sewage discharge device comprises a foam guide pipe and a sewage pipeline; the foam guide pipe has a plurality of foam guide holes; the biological filter pond is connected with both protein separator and sand filtering tank; one end of the sand filtering tank is connected with the biological filter pond, and the other end of the sand filtering tank is connected with one end of an ultraviolet sterilizer; the other end of the ultraviolet sterilizer is connected with the water inlet pipe. The indoor industrial penaeus vannamei culture device disclosed by the invention has the advantages of simple structure, convenience in use and low investment cost, can be used for effectively pushing water inside a penaeus vannamei pond to flow so as to ensure that the water inside the penaeus vannamei pond is in a stable rotational flowing state, can effectively solve the problem that the sewage of the penaeus vannamei pond is effectively discharged in time in a low circulation volume state, is uniform in aeration, improves the utilization ratio of water used for culture, reduces the sewage discharge and reduces the medicine application.

The invention provides a method for preparing butadiene by oxidization and dehydrogenation of butane using a constant-temperature static bed, which specifically comprises the steps that: the butane, air and water vapor are added into a static mixer according to proportions; mixed raw materials are heated to a certain temperature by a pre-heat exchanger, and then enter a constant-temperature static bed reactor for oxidization and dehydrogenation, wherein the static bed reactor is filled with catalyst, and the temperature of a catalyst bed layer of the reactor is controlled to be constant; after the mixed raw materials are oxidized and dehydrogenated, reaction products enter a post-heat exchanger for heat exchange through a raw material waste heat boiler, the products after heat exchange enter a separating system for separating the butadiene, so that butadiene product is obtained. In comparison with the prior art, the method for preparing butadiene by oxidization and dehydrogenation of butane using the constant-temperature static bed disclosed by the invention reaches a conversion per pass of the butadiene of 75%-85%, and the selectivity of the butadiene of at least 95%. The method can increase the conversion rate of the butane and the yield of the butadiene, reduce the butane and water consumed by the butadiene, greatly lower energy consumption, and decrease sewage discharge.

At least one brush disk with a suction opening in the middle and bristles, brush pieces or brush bars rotating centripetally is arranged below a bottom disk of a wall cleaning device, and the suction opening is directly communicated with an impeller air inlet through a suction channel. The wall cleaning device further comprises a water sprinkling mechanism composed of a clean water convey-in pipe, a water pump and a nozzle, and a sewage collecting mechanism arranged on the periphery of an impeller and composed of a sewage collecting groove and a sewage discharge pipe. The water sprinkling mechanism is responsible for sprinkling water, the brush disk is responsible for cleaning a brush and squeezing sewage to the middle suction opening, the impeller generates negative pressure so that the sewage can be sucked in, and the sewage collecting mechanism is used for collecting the sewage sprinkled out of the impeller. Before air flow in which sewage is mixed enters the impeller, the air flow does not need to pass through a filter screen, and the air flow discharged out of the impeller is not discharged through a narrow channel.

The invention discloses a method for preparing an environment-friendly natural fiber printing paste, comprising the following steps of: 1) selecting fine diatomaceous earth having a grain size less than or equal to 2 microns; 2) preparing raw printing paste, wherein the raw printing paste is composed of the following components in terms of weight: 6-13% organic printing paste material, 1-8% fine diatomaceous earth and 0.2-0.6% sodium hexametaphosphate, and rest being water; and 3) preparing the printing paste, wherein the printing paste is composed of the following components in terms of weight: 1-4% dye, 1-7% urea, 1-7% urea replacing agent, 1.5-2.5% sodium bicarbonate, 0.2-1% reserve salt S and 50% raw printing paste, and rest being water. The printing paste obtained through the method of the invention is capable of ensuring the printing quality and also capable of greatly reducing the content of organic matters in sewage discharged after printing, thereby reducing pollution.

The invention relates to a process method for circularly utilizing waste water produced by butadiene preparation through butene oxidative dehydrogenation and belongs to the technical field of chemical industry. The process method is characterized in that: firstly, most of the waste water is sent to an exhaust-heat recovery boiler for use after most organic matters in the waste water discharged from a water-cooling acid rinsing tower are deprived through a waste water distillation tower, and desalted water replenishing of the exhaust-heat recovery boiler is replaced; secondly, partial waste water returns an aldehyde rinsing tower for reusing after most aldehydes in the waste water discharged from the aldehyde rinsing tower are deprived through a blowdown tower, and desalted water using quantity of the aldehyde rinsing tower is reduced; and thirdly, low temperature condensation is carried out for tail gas containing acid and aldehyde, organic matters condensate liquid in the tail gas is recycled, and loads of a waste gas processing system is lightened. Compared with the prior art, a waste water classifying treatment and cyclic utilization process of the process method effectively reduces water replenishing quantity of a technical process, greatly reduces effluent quantity of the waste water simultaneously, reduces a chemical oxygen demand (COD) concentration of discharged sewage and an organic content in discharged gas, and has advantages of being economic, environment-friendly and the like.

The present invention relates to aerobic sludge compost reactor, and is especially one kind of aerobic sludge compost reactor for utilizing high water content sludge. Technologically, the aerobic sludge compost reactor consists of one air controlling system, one stirring system, one fermentation tank system and one heating and temperature controlling system. The fermentation tank system consists of one inner tank and one outer tank, and has sludge inlet, compost outlet, sewage discharge port and manually controlled sewage discharging unit. The air controlling system comprising blower and vacuumizing machine is connected to the fermentation tank through pipeline. The stirring system consists of motor, link rod and stirring blades. The heating and temperature controlling system consists of ceramic casing, asbestos, temperature inductor and control circuit. The present invention has convenient use, low cost, no environmental pollution and other advantages.

The invention discloses a centralization indoor constant temperature circulation aquaculture system which includes two aquaculture ponds arranged side by side. A water inlet and a water outlet are arranged in each aquaculture pond. An aerator and a swell machine are arranged in each aquaculture pond. The centralization indoor constant temperature circulation aquaculture system is characterized in that the two aquaculture ponds are made of thermal insulation materials. A sewage treatment system is arranged between the two aquaculture ponds. A suction sewage device is arranged at the end of water outputting of each aquaculture pond. The suction sewage device is connected with the sewage treatment system through a sewage pipe. A water outlet of the sewage treatment system communicates with each aquaculture pond. The centralization indoor constant temperature circulation aquaculture system has the advantage that circulation utilization of water for aquaculture is achieved so that the quality of aquaculture aquatic products is improved and pollution of sewage discharges to environment is reduced.

The invention discloses an advanced treatment method of biochemical tail water of coking wastewater. The method is characterized by regulating pH of the biochemical tail water of the coking wastewater in a regulation tank to 9-12 by alkaline matters, then adding high-efficiency oxidizing agent for oxidation treatment, precipitating and separating mixed solution, adsorbing filtrate; adsorbing trace organic matters in the wastewater on resin, reclaiming by water at normal temperature; COD of the wastewater reduces from 200mg / L to below 100mg / L after the treatment, chromaticity reduces from 100 folds to almost achromaticity, and other indexes meet Grade 1 standard of the national integrated sewage discharge standard.

The electric field coal tar purifying process includes the technological steps of preparing mixed oil, the first stage of electric purifying, the second stage of electric purifying, the third stage of electric purifying, draining waste water, etc. The experiments show that the coal tar purifying process of the present invention is superior to available coal tar purifying process, and has the advantages of simple technological process, low running cost, high purifying rate, etc. The present invention can reach coal tar purifying rate over 95 %, and the purified coal tar may be used in producing gasoline and diesel oil through hydromodification with no corrosion to the production apparatus, no catalyst poisoning, no blocking of the reactor bed layer and long production apparatus running period.

The invention discloses a mechanical cleaning system for an underground storage tank of a filling station. The mechanical cleaning system comprises a low-pressure jet cleaning device, an air replacement device, a gas atmosphere monitoring device, a cleaned-away dirt separation and recycling device, an oily sewage discharge standardization treatment device and an oil and gas recovery treatment device. The low-pressure jet cleaning device comprises a water storage tank, a booster pump, a heater, a turbine flowmeter and a cleaning machine, wherein the water storage tank, the booster pump, the heater, the turbine flowmeter and the cleaning machine are connected in sequence through pipelines. The air replacement device comprises a nitrogen generator, an air heater and an oilless air compressor. The oil and gas recovery treatment device comprises a precooler and an activated carbon adsorption tank, wherein the precooler and the activated carbon adsorption tank are connected with each other. The cleaned-away dirt separation and recycling device comprises a filter, a vacuum suction tank, a suction pump and an axial inlet hydrocyclone. The oily sewage discharge standardization treatment device comprises a compact vertical swirling air-floatation separation tank and a disk centrifuge. The mechanical cleaning system is intrinsically safe, efficient, environmentally friendly, compact in structure and capable of meeting related discharge requirements.

The invention discloses an ecotype enclosed method for culturing fish through circulation water. Natural seawater, underground salt water, underground fresh water and geothermal water are mainly utilized and mixed, and an industrial culture foundation for producing pollution-free healthy seafood is built and used. A solid-liquid separation purification device is used for replacing sand filtration of a biological filter, ammonia nitrogen and nitrite nitrogen are degraded after water passing through a biological film on biological filler in the biological filter, and the total purification rate of water body particles is over 99%. An aeration pond is arranged to conduct aeration and oxygenation on a culture water body to enable the content of dissolved oxygen in water in a fish culture pond to be kept at 8-14mg / L, finally the water body is sterilized through ultraviolet light, clean ecological water is input into the fish culture pond, and the return water in the fish culture pond is purified repeatedly and utilized in a circulating mode. Sewage discharged from a culture system is purified by an open-air pond and flows back to a water storage sedimentation pond to achieve zero-discharge complete enclosed circulation water factory-like fish culture.

The invention relates to a method for treating industrial circulating water and sewage through the technology of a nano filter film. The invention is characterized in that one part of the sewage is used as the supplementing water of a circulating water system, while the other part is reused after being processed through a nano filter system after the sewage of the industrial circulating cooling water system is flocculated and precipitated and filtered; one part and the other part are added into the circulating water system after being mixed with a certain proportion so as to achieve the reuse of the industrial circulating water, thereby increasing the condensation times of the whole system, decreasing the water implementing quantity and the sewage discharge quantity of the system, and increasing the economic effect of the whole operation.