32results about How to "No entrainment" patented technology

The invention relates to a preparation method of J acid and a J acid waste water comprehensive treatment and recycling method. The J acid waste water comprehensive treatment and recycling method is as follows: the following treatment is carried out on hydrolysis waste water: (1) 30-40% of the total quantity of the hydrolysis waste water is used in an acidification reaction for preparing 2-naphthylamine-1-sulphonic acid by utilizing sodium 2-naphthylamine-1-sulphonate; (2) extraction and reextraction are carried out on the residual hydrolysis waste water, so that Na2SO4 and extraction waste liquor are obtained, the extraction waste liquor is used in a hydrolysis working procedure in a J acid production process, an extraction agent adopted during extraction is composed of 10-30wt% of complex agent, 30-70wt% of diluent and 5-20wt% of tributyl phosphate, and the complex agent is trioctylamine, or trialkyl tertiary amine or combination of trioctylamine and trialkyl tertiary amine. By adopting the preparation method of the J acid, the cost of water for the J acid and waste water treatment cost can be greatly reduced, and environmental pollution can be reduced.

The invention relates to a method extracting high purity n-hexane by integrating rectification and extraction. The method utilizes aromatic hydrocarbon raffinate oil as a raw material and adopts a three-tower technological process which combines continuous rectification and extractive distillation. Firstly, distillate lighter than n-hexane is removed in a rectifying tower, and n-hexane distillate which is around 80% in content is obtained at the bottom of the tower. The distillate at the bottom of the tower is adopted as the raw material of an extractive distillation tower, N-methyl pyrrolidone is adopted as an extracting solvent to be delivered into the extractive distillation tower, and the proportion of the N-methyl pyrrolidone and raw oil is 8:1, after extractive distillation, high purity n-hexane is extracted at the top of the tower by integrating rectification and extraction, and heavy components which are rich in methylcyclopentane and the extracting solvent are at the bottom of the tower. Materials at the bottom of the tower are delivered into a solvent recovery tower, distillate oil which is rich in methylcyclopentane is separated at the top of the tower, and N-methyl pyrrolidone solvent is at the bottom of the tower and sent back to the extractive distillation tower to be recycled. By means of the method, n-hexane content can achieve 99%, no extracting solvent is contained in products, solvent consumption is smaller than 0.1%, one-off yield of n-hexane is larger than 95%, and compared with traditional rectification, energy consumption can be saved over 50%.

The invention discloses a pressure casting method for multi-stage uniform accelerated injection of liquid metal, which comprises three stages of low-speed injection, high-speed injection and pressurization and pressure maintaining, and comprises the following step: determining the initial injection speed, critical speed and critical acceleration of the liquid metal according to the parameters of apressure chamber and the fullness of molten metal after the low-speed injection stage and before the high-speed injection stage. A low-speed injection stage is divided into 3-9 acceleration stages, an injection punch performs uniform acceleration advancing according to the speeds of the 3-9 acceleration stages to reach the critical speed, so that liquid metal is prevented from splashing out of asprue gate to seal the sprue gate of a chamber, and thus, stable laminar flow motion of molten metal in the pressure chamber is achieved, turbulence and vortexes are avoided, air in the pressure chamber can be exhausted through a pouring gate system and a die; and the whole pressure chamber is filled with molten metal, so that the phenomena of air entrapment and oxide inclusion are avoided, air holes and oxide inclusion of castings are reduced, and the performance of the castings is improved.

The invention discloses a fiber liquid film contactor amine washing desulphurization device. The device comprises a first fiber liquid film mass-transfer contactor subassembly. The first fiber liquid film mass-transfer contactor subassembly comprises a fiber liquid film contactor, a settlement separating tank and a stream dividing pack. The vertical fiber liquid film contactor is mounted on one end of the horizontally disposed settlement separating tank through a flange. The device is advantageous in that when the hydrogen sulfide content of liquefied gas produced by an oil refinery is lower than 5000 mg/m3, the hydrogen sulfide content of the liquefied gas hydrogen sulfide in which is removed can be ensured to be lower than 1 mg/m3 by adopting amine washing with a primary fiber liquid film contactor and amine removing with a coalescer, and the liquefied gas after removal is free of entrainment of free amine liquids.

The invention discloses a multistage hollow fiber membrane liquid dehumidifying device applicable to a hot and humid area. The multistage hollow fiber membrane liquid dehumidifying device comprises an air inlet system used for conveying air into a room, an exhaust system used for exhausting the air out of the room, a heat pump system and a dehumidifying solution circulation system. The air inlet system comprises an air inlet channel, a fresh air fan and a plurality of hollow fiber membrane dehumidifying assemblies, wherein the fresh air fan and the hollow fiber membrane dehumidifying assemblies are sequentially arranged on the air inlet channel in the air intake direction. The exhaust system comprises an exhaust channel, an exhaust fan and a plurality of hollow fiber membrane regeneration assemblies, wherein the exhaust fan and the hollow fiber membrane regeneration assemblies are sequentially arranged on the exhaust channel in the air exhausting direction. The heat pump assembly comprises a compressor, an expansion valve, a refrigerant storage tank, a plurality of evaporators and a plurality of condensers. The multistage hollow fiber membrane liquid dehumidifying device avoids the gas and liquid entrainment phenomenon, has good mass transfer efficiency, solves the problem of corrosion of a dehumidifying saline solution to a metal heat exchanger by an existing method, reduces bacterium breeding, lowers the regeneration temperature of the solution and increases the energy utilization rate of a system.

The invention discloses equipment capable of achieving vacuum quantitative casting of molten metal. The equipment comprises a mechanical device, a vacuum quantitative casting device, an opening and closing device and a control system; the vacuum quantitative casting comprises a seal container with internal space, a gas filling mechanism, a vacuum mechanism and an exhaust opening; the exhaust opening comprises a liquid draining opening allowing molten metal to be drained, a pipeline allowing gas to pass through is further arranged in the internal space, and passes through the liquid draining opening, the pipeline is provided with a gas exhaust opening allowing gas not in contact with the molten metal to be exhausted, the opening and closing device achieves independent control over the liquid draining opening and the gas exhaust oponeing, that is, the opening and closing device can independently control opening and closing of the liquid draining opening and the gas exhaust opening, it is ensured that during casing of the molten metal, the oxidation and hydrogen absorption of the molten metal can be reduced, gas holes and oxide inclusion of a casting are reduced, and the casting quality is improved.

The invention discloses a genome magnetic bead extraction test kit. The test kit comprises a lysis solution, proteinase K, isopropanol, hydroxyl magnetic beads, a washing solution and an eluent, wherein the formula of the lysis solution comprises 25 to 75 mM of Tris-HCL with a pH value of 7.5 to 8.5, 3 to 5 M of guanidine isothiocyanate, 5 to 15% of polidocanol and 5 to 15% of PEG8000; the washingsolution comprises a solution A and a solution B; the solution A comprises NaCl with a concentration of 120 to 130 mmol/l and absolute ethyl alcohol with a volume concentration of 80 to 90%; the solution B comprises Tris with a concentration of 25 to 35 mmol/l and absolute ethyl alcohol with a volume concentration of 80 to 90%; and the formula of the eluent comprises 9.5 to 10.5 mM of Tris-HCl and 0.8 to 1.2 mM of EDTA. The concentration of the nucleic acid extracted by the test kit is higher; nucleic acid agarose gel electrophoresis is free of the phenomenons of miscellaneous bands and bandtrailing; and the purity of extracted nucleic acid is better.

The invention discloses a technology for centrifugal extraction treatment of 1,4-dihydroxyanthraquinone industrial wastewater. The pH value of the 1,4-dihydroxyanthraquinone industrial wastewater is adjusted to 0.8 to 1.3 through caustic soda, filtration is conducted to remove mechanical impurities, the 1,4-dihydroxyanthraquinone industrial wastewater is inputted into a heavy phase inlet of a centrifugal extractor at the normal temperature and pressure, meanwhile, a novel extraction agent is inputted into a light phase inlet of the centrifugal extractor, centrifugal extraction and separation are conducted, the oil-water phase ratio of the wastewater to the extraction agent is (1 to 5):(1), and the novel extraction agent is prepared from a complexing agent, a co-solvent, a diluent, and a demulsifier; after separation, raffinate phase extracted water is at a heavy phase outlet and is further treated for reaching the standard for discharging or reuse; and a extract phase loaded extractionagent is at a light phase outlet and sent to back extraction for regeneration. According to the technology for centrifugal extraction treatment of the 1,4-dihydroxyanthraquinone industrial wastewater, required investment is less, the floor area is small, the technological process is simple and reliable, the degree of automation is high, labor intensity is low, the production efficiency is high, and comprehensive treatment of the wastewater can be realized.

The invention relates to a pouring basin for a stepped pouring system. The pouring basin comprises a basin body and water outlets. The basin body is internally provided with a stop body and divided into a liquid inlet cavity and a liquid outlet cavity. The liquid outlet cavity is internally provided with separation dams and divided into two or more liquid outlet cavity bodies, namely the first liquid outlet cavity body and the second liquid outlet cavity body. The stop body is internally provided with stepped connection channels which enable the liquid inlet cavity to communicate with the liquid outlet cavity. The first stepped connection channel is used for enabling the liquid inlet cavity to communicate with the first liquid outlet cavity body, and the second stepped connection channel is used for enabling the liquid inlet cavity to communicate with the second liquid outlet cavity body. The first water outlet is formed in the bottom of the first liquid outlet cavity body, and the second water outlet is formed in the bottom of the second liquid outlet cavity body. The lower portion of the first water outlet and the lower portion of the second water outlet communicate with corresponding sprues. The invention further relates to an application method of the pouring basin for the stepped pouring system. By means of the pouring basin, the problem that multiple pouring basins are not synchronous in pouring is solved; and the pouring basin is easy to operate and low in cost.

The invention discloses a workpiece cleaning system. The workpiece cleaning system comprises a cleaning bin, a supporting table, a fetching mechanism for clamping to-be-cleaned workpieces, and a sand-blasting gun. The fetching mechanism comprises a mounting base, a first drive piece, at least two clamping claws and a second drive piece connected with the mounting base through a rotating shaft, thefirst drive piece is connected with the clamping claws and used for driving the clamping claws to clamp or release the workpieces, and the second drive piece drives the mounting base to rotate. The sand-blasting gun comprises a body, a pipe opening in the rear end of the body is connected with a liquid inlet pipe, and the liquid inlet pipe is connected with a two-cylinder pressure pump; the bodyis provided with a control piece; and the front end of the body is connected with a nozzle, a fluid inlet of the nozzle is connected with a pipe opening in the front end of the body, a sand inlet of the nozzle is connected with a sand inlet pipe, and the sand inlet pipe is connected with a sand source. The two-cylinder pressure pump comprises a first plunger pump, a second plunger pump and a drivedevice for driving the first plunger pump and the second plunger pump to output high-pressure liquid alternately. The workpiece cleaning system is low in manual cost, high in safety performance, highin jet pressure, thorough in cleaning, free of cleaning dead corners and high in cleaning efficiency.

The invention discloses a flash evaporator for gasifying liquid phase substances. The flash evaporator comprises an outer flash tank frame body and an outer demister frame body, wherein a flash tank gas phase outlet, a flash tank material inlet and a manhole are formed in the outer surface of the outer flash tank frame body; a downcomer is mounted in the outer flash tank frame body; a primary distributor is mounted under the downcomer; a distributor is mounted under the primary distributor; V-shaped weirs, a flash tank bed casting die, a flash tank bed and a flash tank bed supporting layer are mounted under the distributor; a concentrated solution gathering tank is mounted under the flash tank bed supporting layer, and a concentrated solution outlet of a flash tank is formed in a position under the flash tank bed supporting layer; a demister bed is mounted in the outer demister frame body; and a demister outlet and a demister inlet are formed in the outer surface of the outer demister frame body. The flash evaporator disclosed by the invention has the advantages that the flash efficiency of liquid phase materials is high; the flashed materials cannot have the phenomenon that materials and foams are mixed; and materials which are easy to crystallize cannot block the distributor and fillings.