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1830results about How to "Reduce fouling" patented technology

Processing method for reducing and recycling organic waste water and processing system

The invention provides a processing method for reducing and recycling organic waste water. The method comprises steps: (1) pre-treating waste water to obtain pre-treated out-water; (2) treating the out-water obtained from the step (1) through solid-liquid separation; (3) nano-filtering the out-water obtained from step (2); (4) treating nano-filtered concentrated water obtained from the step (3) to obtain out-water subjected concentrated water nano-filtering, returning to the step (3) for mixing the out-water subjected to concentrated water nano-filtering with the out-water subjected to solid-liquid separation, and performing nano-filtering; (5) performing first reverse osmosis treatment on out-water obtained from the step (3) through nano-filtering; (6) performing second reverse osmosis treatment on concentrated water obtained from the step (5) through first reverse osmosis treatment; and (7) evaporating and crystallizing a concentrated liquid obtained from the step (6) through second reverse osmosis treatment in order to obtain crystallized salt and evaporated concentrated water. The invention further provides a processing system of the method. Through the method and system, waste water is truly reduced and recycled.
Owner:DATANG INT CHEM TECH RESINST

Resource technology and system for separating salt from high-salinity wastewater

The invention discloses a zero-drainage technology for recycling crystallizing salt from high-salinity wastewater and a treatment system thereof. The treatment system comprises a tubular microfiltration system, a weak acid resin hardness removal system, a nanofiltration membrane salt separating system, a nanofiltration concentrated water oxidizing system, a nanofiltration concentrated water sodiumsulfate evaporating and crystallizing system, a sodium sulfate freezing and crystallizing system and the like. The zero-drainage technology has the advantages that the pretreated wastewater is subject to nanofiltration primary salt separating, the salt component in the produced water is mainly sodium chloride, the sodium chloride with purity no lower than 98.5% is obtained by membrane concentration, evaporating and crystallizing, and the sodium sulfate with purity 99.1% or more is produced by MVR (mechanical vapor recompression) crystallizing after concentrated water oxidizing; a mother liquid after evaporating and crystallizing of sodium sulfate and a mother liquid after nanofiltration evaporating and crystallizing are mixed and frozen, so as to obtain mirabilite, and the mirabilite is converted into anhydrous sodium sulfate after sodium sulfate evaporating and crystallizing; at the premises of ensuring quality, the whole recycling rate of salt reaches 90% or above; finally, a smallamount of mother liquid is sprayed, dried and cured, and the zero-drainage effect of wastewater is realized.
Owner:侯新春 +1

Method for treating coal gasification wastewater containing phenol and ammonia

InactiveCN101597124AEffective removal of fixed ammonia contentMeet the requirements of subsequent biochemical treatmentMultistage water/sewage treatmentWater/sewage treatment by degassingCoal gasification wastewaterHigh concentration
The invention relates to a method for treating coal gasification wastewater containing phenol and ammonia. The method comprises the following steps: single tower alkali injection and pressurization steam stripping removal of acidic gas and ammonia, three-level dephlegmation of lateral line tapped gas, extraction of phenol by diisopropyl ether and solvent recovery. The cold and hot coal gasification wastewater, according to a certain proportion, respectively enters a pressurization single tower from the upper part and middle upper part of a wastewater steam stripping tower, and acid gas is discharged from the tower top; the lateral line withdrawal mixed gas goes through three-level dephlegmation to obtain high-concentration ammonia, alkali is injected at the position below the lateral line to transform fixed ammonia into free ammonia which is to be removed; counter-current extraction is carried out on removed ammonia, residue of acid gas and diisopropyl ether to dephenolize; extraction solvent is recovered by a solvent recovery tower and a solvent steam stripping tower to obtain the byproduct, namely crude phenol. In the method of the invention, the process removing acid gas, free ammonia and fixed ammonia is carried out simultaneously on the coal gasification wastewater in the wastewater steam stripping single tower, as a result, high-concentration ammonia is obtained, the content of carbon dioxide, sulfureted hydrogen, free ammonia and fixed ammonia in tower kettle purified water is extremely low, encrustment is not prone to take place, and the purified coal gasification wastewater meets the requirement of follow-up biochemical treatment.
Owner:SOUTH CHINA UNIV OF TECH +2

Ultraviolet curing equipment and method for optical fiber coating

The invention relates to ultraviolet curing equipment and method for an optical fiber coating. The equipment comprises a cylindrical mounting base, wherein an inner cavity of the cylindrical mounting base is provided with UVLED (Ultraviolet Light Emitting Diode) light source modules in a peripheral direction and an axial direction; a cylindrical focusing lens is arranged in front of light-emitting surfaces of the UVLED light source modules, so that ultraviolet rays emitted from the UVLED light source modules are focused on a same curing axis. The ultraviolet curing equipment disclosed by the invention is long in service life, small in heating amount and low in energy consumption; a layout space of light sources is large, so that the output of the UV light sources of a plurality of UVLED light source modules are focused on the curing axis to form a UV light column with high light intensity; an optical fiber absorbs UV and is cured when passing through the UV light column; the light strength of the light column is high and the light sources are from multiple directions, so that the equipment has higher curing efficiency and better curing uniformity, the curing time is shortened, the work efficiency of wiredrawing of the optical fiber is improved, and the curing quality of the coating is improved.
Owner:YANGTZE OPTICAL FIBRE & CABLE CO LTD

Intelligent nursing toilet system

ActiveCN102920565AGood dirt absorption effectGuaranteed cleaning comfortMedical transportElectrical and Electronics engineeringToilet
The invention particularly discloses an intelligent nursing toilet system. The system comprises a defecation receiving assembly, a toilet host assembly and a connecting pipeline assembly, wherein the connecting pipeline assembly comprises a washing pipeline, a blow-off pipeline, a vacuum pipeline and an electrical pipeline; the defecation receiving assembly comprises a drying unit, a flushing unit, a defecation receiving unit and a detection unit, the drying unit and the flushing unit are arranged over the defecation receiving assembly, and the detection unit is arranged in the defecation receiving assembly; the defecation host assembly comprises a dirt box, a washing water unit, a vacuum control unit and a control unit; the detection unit, the washing water unit and the vacuum control unit are connected with the control unit respectively through the electrical pipeline; the defecation receiving assembly is connected with the dirt box through the blow-off pipeline on one hand and connected with the vacuum control unit and the washing water unit respectively on the other hand; and the flushing unit is connected with the washing unit through the washing pipeline, the drying unit is connected with the vacuum control unit through the vacuum pipeline, and the dirt box is connected with the vacuum control unit.
Owner:CRRC SHANDONG CO LTD

Technology for recovering production of electrolytic copper and zinc from smelting ash

The invention discloses a technology for recovering production of electrolytic copper and zinc from smelting ash. The technology comprises a step of smelting ash leaching, a step of copper extraction and purification through copper electrodeposition, a step of iron removal through neutralization, a step of cadmium removal, and a step of zinc extraction and purification through zinc electrodeposition. The method is characterized in that chemical components in the smelting ash are analyzed, and the smelting ash is leached by a sulfuric acid solution leaching agent; the leachate obtained after the above leaching reaction undergoes a separation operation of copper extraction and purification through the copper electrodeposition; the resultant copper extraction liquor is neutralized by high-zinc dust which is a neutralizer to remove iron; cadmium is displaced and deposited by zinc powder having a mass same with cadmium after the iron removal through the neutralization; and the zinc extraction is carried out through the zinc electrodeposition by casting zinc ingot products. The technology has a wide adaptability, adopts two steps to complete the exchange reaction of zinc oxide and copper oxide in the raw material with an acid, and adopts the high-zinc dust as the neutralizer, so the massive zinc loss caused by entrainment of routine neutralizers comprising calcium oxide and sodium hydroxide is avoided. A zinc extraction liquor obtained in the above step is purified by N235, so economy and effectiveness are realized.
Owner:江西自立环保科技有限公司

Method for controlling expansion and shrinkage of lamination of multiple layers of boards

InactiveCN103987194AIncrease profitMeet the needs of large typesetting productionMultilayer circuit manufacturePunchingX-ray
The invention relates to a method for controlling expansion and shrinkage of lamination of multiple layers of boards. The method comprises the steps that board incoming quality inspection is conducted, a dimensional stability test is conducted, and a part number is selected according to a test result; according to relevant parameters, an expansion and shrinkage library is established; inner films are produced, and measurement and statistics are conducted on the produced films; punching is conducted on multiple layers of boards which are not laminated; according to the thickness of each board, rivets with appropriate height are selected for riveting; the pattern is adjusted, the lamination conditions are set; lamination is conducted; holes are drilled through an X-RAY target drilling machine. Compared with the prior art, the method for controlling expansion and shrinkage of lamination of the multiple layers of boards has the advantages that the demand for large-composition production is met, production cost is effectively reduced, the utilization ratio of the boards is increased, the production efficiency is improved, and the rejection rate is reduced. Factors influencing control over expansion and shrinkage are controlled, the range of the influence caused by expansion and shrinkage is effectively narrowed, the error rate of drilling is effectively reduced, defective products and scrapped products caused by overall displacement of the multiple layers of boards are reduced, the drilling first-workpiece percent of pass is increased, and halt determination time is shortened.
Owner:奥士康精密电路(惠州)有限公司

Flue gas dust removal desulphurization system of double-circulation Venturi rod tower

The invention belongs to the field of environment protection, and discloses a wet-method flue gas dust removal desulphurization system of a double-circulation Venturi rod tower. The system comprises an adsorption-liquid supplying unit, a flue-gas purification unit and an adsorption-liquid postprocessing unit. The flue-gas purification unit comprises an upper Venturi rod tower section, a lower Venturi rod tower section, a shutter-type separation cone separating the upper Venturi rod tower section and the lower Venturi rod tower section, an upper circulation liquid pool, a lower circulation liquid pool, upper circulation-liquid sprayers, lower circulation-liquid sprayers, and demisters. Flue gas in the upper tower section and flue gas in the lower tower section are in series connection. A circulation-liquid spraying system is operated independently. Dust removal and desulphurization are separately optimized and performed. The "homogenization" gas flow distribution, "gas in liquid" efficient mass transfer, highly-turbulent "self-cleaning", and other effects of Venturi rod layers are fully utilized by the system so as to perform efficient cooling, dust removal desulphurization of the flue gas. The system is advantages by high dust removal desulphurization efficiency, low operation liquid gas ratio, small resistance, less scale, small occupation area, low investment, low operation energy consumption, less discharge of high-salt water, and the like, and is suitable for dust removal and desulphurization for various kinds of flue gas, particularly suitable for processing of high-temperature high-dust high-sulfur flue gas such as regenerated flue gas of a petroleum catalytic cracking device.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
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