54 results about "Reflux flow" patented technology

The invention relates to an air incorporation measurement system used for vehicle exhaust-gas disposal. The system is characterized in that the measurement system comprises a measurement supply unit, a measurement drive part, an air solenoid valve, a spillover valve, a urea tank, a pressure accumulation cavity temperature sensor, a mixing cavity pressure sensor, a DCU control part, and a catalyst, etc. The measurement supply unit is connected with the catalyst, the air solenoid valve is connected with a quick coupling, an outlet quick coupling is connected with a nozzle by a pipeline, urea solution in the urea tank is conveyed to the measurement supply unit by a membrane pump, a reflux inlet is connected with the spillover valve by the quick coupling, the reflux flows to the urea tank, a compressed air inlet is connected with a compressed air source, and a mixing outlet sprays gas-liquid mixture into an exhaust duct through the nozzle by means of being connected with the pipeline. Themeasurement system of the invention features compact structure, small volume, light weight and accurate measurement, thus saving much space for vehicle layout while maintaining relatively high measuring accuracy and fog effect and ensuring reliability of normal operation in different areas and environments.

An ink circulation system includes: an ink-jet head in which a shared ink flowing route is formed, an ink tank, a supply flowing route for supplying ink from the ink tank to the shared ink flowing route, a reflux flowing rout for refluxing the ink from the shared ink flowing route to the ink tank, and a differential pressure generating unit for generating a differential pressure in the ink tank. The differential pressure generating unit is equipped with an impeller placed inside the ink tank, and a drive unit placed outside the ink tank. Then, the drive unit operates to turn the impeller, by means of remote driving, for generating a differential pressure between a supply port of the supply flowing route and a reflux port of the reflux flowing route so as to circulate the ink through the ink flowing route.

A polyolefin production system, comprising a polymerization reactor (such as a polyethylene loop slurry reactor) and a fractionation system that receives reactor effluent processed in a diluent/monomer recovery system for recycle to the reactor and to suppliers. A conduit diverts a portion of a reflux flow comprising monomer, such as ethylene, from within the fractionation system to the polymerization reactor, providing for less venting of monomer, such as ethylene, to the supplier. Accordingly, monomer yield is advantageously increased, as the monomer returned to the reactor displaces monomer feedstock to the reactor. The reflux flow may originate from a condensed overhead lights from a diluent recycle column disposed in the fractionation subsystem. The diluent recycle column may receive a stream comprising diluent and monomer as feed from the diluent/monomer recovery subsystem, and may receive the non-diverted portion of the reflux flow as reflux.

This method comprises cooling the supply flow in a first heat exchanger, separation in a first separation flask in order to produce a light upper flow and a heavy lower flow and dividing the light upper flow into a supply fraction of a dynamic pressure reduction turbine and a supply fraction of a first distillation column.

The method comprises forming a cooled reflux flow from an effluent from a dynamic pressure reduction turbine, the portion of the effluent being cooled and at least partially liquefied in a heat exchanger.

It comprises introducing the cooled reflux flow from the heat exchanger into the first distillation column.

The invention relates to a system and method for rectifying and purifying dimethyl oxalate synthesized through carbonylation of glycol from coal. Through the system and method, the purity of the dimethyl oxalate product can be imprved, energy consumption is reduced, and the production cost is saved. The system comprises a dimethyl oxalate feeding heat exchanger and a vacuum rectification tower communicating with the dimethyl oxalate feeding heat exchanger, wherein a reboiler is arranged at the bottom of the tower, a tower-top condenser communicates with the top of the vacuum rectification tower through an evaporation vapor outlet, and the tower-top condenser communicates with a reflux tank and a tail cooler separately; the reflux tank communicates with a reflux pump, the reflux pump communicates with the top of the vacuum distillation tower and a tower-top extraction flow regulating valve, and the bottom of the rectification tower communicates with a heavy component discharge pump; andthe heavy component discharge pump passes through the dimethyl oxalate feeding heat exchanger and communicates with a material outlet of the tower through a pipeline and a tower liquid level regulating valve, a reflux flow regulating valve is arranged on the outlet pipeline of the reflux pump so as to remove light component impurities in a dimethyl oxalate mixed liquid and obtain a high-purity dimethyl oxalate intermediate product. Through vacuum operation, the boiling points of the components are reduced, the consumption of medium pressure steam is reduced, and the cost is reduced; and the tower components and the tower-top light components are taken out continuously, heat and materials are recycled and utilized effectively, and no outer emission of the materials occurs.

The invention discloses a technology for separating ethylene glycol monomethyl ether and water by use of a continuous azeotropic distillation method. The technology comprises the following steps of: 1) an entrainer is added into a tower kettle of an azeotropic distillation tower, the raw material enters the azeotropic distillation tower from the 28th tower plate, the operation reflux ratio is 1-3, and the reflux flows back from the tower top of the azeotropic distillation tower; and after phase splitting, the ester-rich phase enters the azeotropic distillation tower, the water-rich phase enters an entrainer recycling tower, and the product of the tower kettle of the azeotropic distillation tower is ethylene glycol monomethyl ether; and 2) after the water-rich phase enters the entrainer recycling tower, common distillation is carried out, wherein the operation reflux ratio is 1-2.5, and the reflux flows back from the tower top of the entrainer recycling tower; and after phase splitting of the produced liquid, the water-rich phase enters the entrainer recycling tower, and water is contained in the tower kettle of the entrainer recycling tower. By taking isopropyl acetate as an entrainer, the technology disclosed by the invention has the characteristics of low toxicity, low pollution, low cost, high yield, high product purity and the like, has wide application prospect, and is particularly suitable for the fields of pharmacy and the like.

The invention relates to a method of producing ethyl acetate by reaction of ethyl alcohol with acetic acid and/or acetic anhydride in presence of a solid acidic catalyst and during simultaneous distillatory separation of reaction components, in which acetic acid or acetic anhydride or their mixture and ethyl alcohol are introduced separately in molar ratio 2:1 to 1:2.5 and in a defined quantity, based on volume unit of catalyst, into the system separated into three zones, whereby, in the reaction zone, the reaction runs simultaneously with the distillatory separation of components, acetic acid feed is introduced into the reaction zone or above the zone and ethyl alcohol feed is introduced into the reaction zone or below this zone, in the upper separation zone, the volatile mixture is separated, thereafter, it is cooled to 5 to 70 DEG C and then separated to water and organic phases and this organic phase with high ethyl acetate content is drawn off and partially returned as reflux flow into this system, whereby, the ratio of the input components feed and the organic phase reflux flow is 1:1 to 1:20. A subject matter of this invention is also an equipment for carrying out this method.

A Fenton fluidized bed reactor and an operation method thereof are disclosed. The reactor includes a reactor shell, an inlet flow pattern distributor, a reflux flow pattern distributor, a hydrogen peroxide flow pattern distributor, a separating plate, a three-dimensional filter, a reflux pump, a water feeding pump, a pipeline mixer, an acid adding pump, a ferrous adding pump and a hydrogen peroxide adding pump. The reactor is uniform in water distribution and does not need additionally added power for stirring, thus saving the operation electric charge, reducing ineffective hydrogen peroxide decomposition caused by violent stirring and reducing the using amount of the hydrogen peroxide. The hydrogen peroxide and the ferrous sulphate are added separately, thus reducing ineffective consumption of agents. Active catalytic crystals are formed. The yield of iron-containing sludge is reduced.

The invention relates to a residue automatic discharging filter. According to the device, a case body comprises a liquid inlet chamber and a liquid outlet chamber. An automatic discharging device is arranged in the liquid inlet chamber. A water pump and a filtering cylinder are arranged on the liquid outlet chamber. A shaft rotates under the driving of gravity of liquid buckets by reflux flowing. A driving belt and a conveyer belt rotate under the driving of the shaft. Magnetic teeth are arranged on the driving belt, and the conveyer belt is covered on the driving belt. With the magnetic force provided by the magnetic teeth, iron powder mixed in liquid can be absorbed on the surface of the conveyer belt. When the conveyer belt passes through the driving shaft, the conveyer belt is separated from the driving belt, such that the magnetic force is lost. Iron powder is detached and fell from the conveyer belt, and is discharged from a residue discharging groove.

The present invention provides a hollow fibrous membrane separation equipment and its operation method. Said membrane separation equipment includes membrane component, control valve, pressure gauge pump, air compressor, filter tank and connecting pipeline, liquid inlet pipeline and liquid outlet pipeline. The membrane separation equipment also includes working flow path, circulation reflux flow path, compressed air supplying pipeline, chemical cleaning reflux flow path and by-pass pipeline. Its operation method utilizes the valve on the pipeline to make said system implement switching-over between working state, first cleaning state, second cleaning state and chemical cleaning state.

The invention provides an ethyl acetate-water system supergravity distillation separation method. An ethyl acetate-water system supergravity distillation separation device is composed of an ethyl acetate-water storage tank, an ethyl acetate-water pump, an ethyl acetate-water flow meter, a reboiler, a separation liquid pump, a baffling supergravity distillation machine, a speed regulating motor, afinished product storage tank, a finished product flow meter, a finished product pump, a condenser, a reflux flow meter and corresponding connecting pipelines. A continuous separation recycling process using the baffling supergravity distillation machine is adopted, so that separation time can be shortened greatly, purity of recycled ethyl acetate and recycling efficiency are improved, and occupied space of conventional distillation separation equipment is saved. The method is simple in process, low in energy consumption and capable of realizing industrial production.

The invention relates to a device for resisting gasification of an aerogenesis liquid medium of a plunger pump, wherein the device for resisting gasification of the aerogenesis liquid medium of the plunger pump comprises an adjusting manifold; the adjusting manifold is used for adjusting a reflux flow and keeping a constant pressure and a constant temperature in a liquid inlet cavity of the plunger pump; the adjusting manifold comprises a throttle valve, a check valve, a reflux pipeline and a heat exchange booster; an inlet of the throttle valve is arranged in a channel of the liquid inlet cavity of the plunger pump or communicated with the liquid inlet cavity of the plunger pump; an outlet of the throttle valve is communicated with an inlet of the check valve; an outlet of the check valve is communicated with a liquid inlet of the heat exchange booster through the reflux pipeline; a liquid outlet of the heat exchange booster is communicated with a reflux end of an aerogenesis liquid medium storage tank. Compared with the prior art, the device for resisting gasification of the aerogenesis liquid medium of the plunger pump is simple to operate and strong in practicability; the device for resisting gasification of the aerogenesis liquid medium of the plunger pump is matched in a reciprocating plunger pump, so that the problem of a gasification process during conveying the aerogenesis liquid medium through the normal plunger pump can be avoided, thus reliable equipment support is provided for conveying other aerogenesis liquid mediums such as liquid CO2.

The invention discloses a method for preparing lauryl methacrylate, which comprises the following steps of: (1) putting main materials of lauryl alcohol and methacrylic acid into an esterification reaction container, adding a solvent, adding a catalyst and a polymerization inhibitor A, and performing mixing reaction to obtain a reaction material; (2) controlling the pressure in the esterification reaction container to be -0.04 to -0.08MPa, raising the temperature in the esterification reaction container until reflux flows out, keeping the temperature, and beginning cooling to normal temperature until no reflux flows out or an acid value in reaction solution is detected to be 30-50mgKOH/g; (3) transferring the reaction material to a washing container, adding alkali liquor, controlling the pH value of the reaction material to be 7-8, standing until the reaction material is layered, and discharging wastewater on the lower layer; and (4) transferring the reaction material of which the wastewater is removed to a distillation container, adding a polymerization inhibitor B, vacuumizing the distillation container, and distilling to remove methylbenzene to obtain the product. The product is high in purity, good in color, and high in yield.

The present invention discloses a treatment apparatus and a treatment method for wastewater produced during a fumaric acid generation process. The treatment apparatus comprises a heating chamber, a crystallizer, a rectification tower, a cooler, a crystal receiving groove, a reflux flow meter, a distillate flow meter, a centrifuge and a condenser. According to the present invention, the components in the acid water of a phthalic anhydride tail gas absorption tower are more, wherein water is the light key component, maleic acid is the heavy key component, and the relative volatility is 6 under a normal pressure and is 14.9 under a vacuum degree of 10 KPa, such that the relative volatility is greatly increased; the rectification principle is utilized, and the crystallization, the evaporation and other operation units are integrated so as to greatly increase the separation efficiency and save the energy source and the manpower; and the treatment apparatus and the treatment method have the following beneficial effects that: the cheap low-pressure steam is used to treat at a lower temperature, the COD content in the effluent after the rectification is less than 100 PPM, the PH value of the effluent is greater than 6, the effluent can be directly discharged, and the apparatus has characteristics of simple structure, easy control process, low operating temperature, safety, reliability, low cost, and small occupation space.

The invention discloses a method for preparing triethylene glycol dimethacrylate, which comprises the following steps of: (1) putting main materials of triethylene glycol and methacrylic acid into an esterification reaction container, adding a solvent, adding a catalyst and a polymerization inhibitor A, and performing mixing reaction to obtain a reaction material; (2) controlling the pressure in the esterification reaction container to be -0.04 to -0.08MPa, raising the temperature in the esterification reaction container until reflux flows out, keeping the temperature, and beginning cooling to normal temperature until no reflux flows out or an acid value in reaction solution is detected to be 3-5mgKOH/g; (3) transferring the reaction material to a washing container, adding alkali liquor, controlling the pH value of the reaction material to be 7-8, standing until the reaction material is layered, and discharging wastewater on the lower layer; and (4) transferring the reaction material of which the wastewater is removed to a distillation container, adding a polymerization inhibitor B, vacuumizing the distillation container, and distilling to remove methylbenzene to obtain the product. The product is high in purity, good in color, and high in yield.

The invention discloses a method for producing jet fuel. The method comprises the following contents: a straight-run diesel oil raw material and hydrocracking generated oil are mixed, heated and/or subjected to heat exchange and enter a reaction rectification tower from the middle, and a product descends into a catalytic reaction zone filled with a hydrofining catalyst in the tower for hydrofiningreaction, wherein light components rise to the rectification section of the reaction rectification tower for fractionation, one part of the liquid phase as overhead reflux flows into the reaction rectification tower, and the other part comprising naphtha, jet fuel and the like as products is discharged out of the system; heavy components continue to descend in a stripping section, are dischargedfrom the bottom of the tower, and enter a hydrocracking reactor filled with a hydrocracking catalyst for hydrocracking reaction. According to the method, the straight-run diesel oil is taken as a mainraw material, the reaction process and the reaction depth are adjusted and controlled by selecting a proper process flow and catalyst system, more components in the straight-run diesel oil raw material are converted into jet fuel products, and accordingly, the yield of the jet fuel products is increased, and the quality of the jet fuel products is improved.

The invention relates to a process for preparing gamma-chloropropylmethyldimethoxysilane. The gamma-chloropropylmethyldichlorosilane is uniformly added at the speed of 3,000g/5h, the methanol is uniformly added at the speed of 1,000g/5h, and the liquid reflux flow speed in a reflux tank D is controlled to be 200g/5h; the reaction temperature in a reaction tower A is between 65 DEC and 75 DEG C, and the reaction temperature in a reaction kettle C is between 140 DEG C and 160 DEG C; a packing layer in the reaction tower A is between 1m and 1.2m, glass or ceramic material is adopted, the porosity in the packing layer is between 60 percent and 70 percent. The process is matched with needed equipment, can realize continuous production and has reasonable and compact device and stable running. Because an optimal technical parameter is matched, the yield can be as high as 98 percent, therefore, the pollution is small, and the production efficiency is high.

The invention relates to a lifting slide, which is at least composed of a single-section lifting slideway structure. The single-section lifting slideway structure includes a slide entrance section, a slide upward section and a slide exit section connected from bottom to top. The slide entrance section 1. The upward section of the slide and the exit section of the slide are all connected by multi-section slideways. In the entrance section of the slide, a section of the slideway located at the head is installed with a spraying device for spraying water, and the spraying device is connected to the water supply pipe through a flange. The present invention can use the water flow to slide the raft with tourists from bottom to top by setting the spray device on the slideway, and by setting the return water tank in the slideway, it can realize the return of the water flow to the pumping pool for recycling , setting grilles in each slideway can realize the circulation of water flow to the return water tank. The present invention relies on the sprayed water flow to realize sliding from bottom to top, which not only increases the way of playing, but also increases the composition of the drifting river, greatly increasing the for fun.

The invention discloses an automatic equivalent distributing device of cluster distillation reflux. The automatic equivalent distributing device of the cluster distillation reflux comprises an external groove wall, an inner reflux groove connected with a reflux discharge pipe, and a plurality of reflux flowing guide pipes; the external groove wall is positioned on the outer periphery of the inner reflux groove; a plurality of baffles which are distributed radially by taking the center of the inner reflux groove as a circle center is connected between the external groove wall and a wall plate of the inner reflux groove; reflux sub-grooves are formed between adjacent baffles; moreover, reflux flowing hole groups with the same arrangement are respectively formed in the wall plate of the inner reflux groove and corresponding parts of the corresponding reflux sub-grooves; additionally, the flow liquid hole groups are communicated with the inner sides of the corresponding reflux sub-grooves; the reflux flowing guide pipes are communicated with the bottoms of the outer side of the corresponding reflux inner groove. According to the device, the reflux is automatically and equivalently distributed to a plurality of distillation towers, so that the distillation effect is improved.