418results about "Fractional distillation" patented technology

The present application relates to a kind of heat pump rectification systems based on heat shock flash circulation lift heat exchange, including rectifying tower, lift membrane reboiler, first throttling valve and heat shock heater, the secondary steam outlet of rectifying tower is connected with the heating steam import of lift membrane reboiler, the discharge port of the bottom of rectifying tower is connected with the cold side flow channel import of heat shock heater, and the cold side flow channel export of heat shock heater is connected with the feed inlet of lift membrane reboiler by first throttling valve;The vapor-liquid mixture outlet of lift membrane reboiler is connected with the column still liquid reflux port of rectifying tower, and the steam condensate outlet of lift membrane reboiler is connected with condensate tank, and the liquid outlet of condensate tank is connected with the condensate reflux port of rectifying tower side wall.The present application is combined by heat shock pressurization energy storage and throttling flash kinetic energy release, provides independent and stable lift membrane kinetic energy for lift membrane heat exchange, so that the flow pattern in the tube of lift membrane reboiler directly enters the efficient annular flow stage, improves the industrial applicability of lift membrane heat exchange technology in heat pump rectification system.

This invention discloses a data-driven real-time dual-temperature optimization control method for distillation columns, belonging to the field of chemical process control and energy conservation. First, a global optimization of the steady-state model of the two-column series system is performed based on a genetic algorithm, and a dual-temperature dynamic control architecture with cross-coordination of the reboiler and reflux ratio is constructed by combining sensitivity analysis. Second, full operating space data is extracted through Latin hypercube sampling, and a high-precision artificial neural network (ANN) surrogate model is trained to replace the mechanistic equations. Finally, when facing operating disturbances, the GA-ANN is used for real-time rapid optimization to find the optimal temperature setpoint that minimizes total energy consumption, and the result is sent to the closed-loop execution of the dual-temperature PID architecture. This invention completely overcomes computational latency, limits product purity fluctuations to within ±0.002 when facing severe disturbances, effectively reduces the total system energy consumption by 1.82%, and achieves efficient, stable, and low-carbon operation of the distillation process.

This utility model discloses a displacement medium separation and recovery device for a propane dehydrogenation production line, comprising an absorption tower and a stabilizing tower. The absorption tower is connected at its middle section to the feed pipeline of the product compression unit and the feed pipeline of the gas fractionation unit. At its top, the absorption tower is connected to a dry gas separator via a non-condensable gas pipeline. The top of the dry gas separator is connected to the flare header via a flare discharge pipeline. At its bottom, the absorption tower is connected to the stabilizing tower via a rich absorbent oil pipeline. The stabilizing tower is connected to a reflux tank via a gas-phase liquefied gas pipeline. The output end of the reflux tank is connected to the gas fractionation unit via a liquefied gas pipeline, and a liquefied gas transfer pump is installed on the liquefied gas pipeline. At its lower end, the stabilizing tower is connected to the absorption tower via a lean absorbent oil pipeline, and a lean absorbent oil transfer pump is installed on the lean absorbent oil pipeline. This utility model can partially recover residual propane gas in the displacement medium, improving production efficiency and reducing environmental pollution.

This invention provides a system and method for removing high and low boiling points in polysilicon production. The system includes a first distillation column comprising a top rectifying section, a bottom stripping section, and a separation section between the rectifying and stripping sections, all of which are sequentially interconnected. The separation section includes a pre-fractionation section and a main fractionation section arranged side-by-side but not interconnected. The main fractionation section includes, from top to bottom, a first main fractionation section and a second main fractionation section that are interconnected. The pre-fractionation section has a low-boiling material inlet, the stripping section has a bottom outlet, and the first main fractionation section has a first outlet. The outlet of the disproportionation fixed-bed reactor is connected to the low-boiling material inlet. The second distillation column has a high-boiling material inlet and a top outlet, and the bottom outlet of the stripping section is connected to the high-boiling material inlet. The first outlet and the top outlet of the second distillation column are respectively connected to an adsorption column.

A chemical reformer system has an inlet, a digester, a series of chemical reformers, coolers and separators. The temperatures and pressures of the digester and chemical reformers may be regulated, where the pressure decreases from the first chemical reformer to the last and the temperature increases from the first chemical reformer to the last. The chemical reformer system may be utilized to convert feedstock biomass to output compounds, such as bio-oils.

The application relates to the field of purification technology, in particular to a device and method for reducing the total amine content in NMP rectification, which comprises a tower body, a protective cover I and a protective cover II are installed outside the tower body, a water suction pump is installed outside the tower body, a transmission pipe is installed at the output end of the water suction pump, a filling layer is fixedly connected in the baffle, the device further comprises a chain wheel I which is rotationally connected with the transmission pipe, two groups of sprayers are slidingly connected at the bottom end of the chain wheel I, a motor is installed outside the tower body, a transmission mechanism is arranged at the output end of the motor and used for driving the chain wheel I to rotate when the motor operates, and a ring plate is fixedly connected outside the two groups of sprayers. Through the structural design of the transmission mechanism, the motor operation is realized through the transmission mechanism, the sprayers are made to rotate at high speed to generate centrifugal force, the centrifugal force can automatically break the slight blockage in combination with the internal water pressure, so that the spraying is ensured to be smooth; on the other hand, the spraying liquid can be diffused, the contact area between the liquid and the filling layer is increased, and the spraying limitation is avoided.

This application discloses an integrated method and system for the co-production of MTO methanol and refined methanol, belonging to the field of chemical technology. The co-production method provided by this application includes: feeding crude methanol into a light-duty removal distillation column for pre-distillation treatment to obtain a pre-distillation column bottom component; dividing the pre-distillation column bottom component into two streams, one as the output of MTO methanol and the other as a reprocessed component of the pre-distillation column bottom; feeding the reprocessed component of the pre-distillation column bottom into a refined methanol distillation column for distillation treatment to obtain a distillation column top component and a distillation column bottom component; at least a portion of the distillation column top component is output as refined methanol, and the distillation column bottom component is returned to the light-duty removal distillation column. This application achieves the co-production of refined methanol using only two columns, eliminating the need for additional independent equipment, significantly reducing equipment investment costs, and enabling flexible adjustment of both MTO methanol and refined methanol products, thus possessing broad application prospects in the industrial-grade MTO methanol field.

The application discloses a novel high-efficiency large-flux three-dimensional mass transfer tray and relates to the technical field of mass transfer separation towers, comprising a horizontal plate and a three-dimensional cap, wherein a plurality of air holes are formed in the lower part of each cap as gas inlets; the three-dimensional cap is divided into upper and lower two parts of a lifting section and a shunt section; the bottom of the wall surface of the lifting section is provided with a liquid hole as a channel for liquid to enter the three-dimensional cap; and the shunt section is provided with a stepped baffle structure. The novel high-efficiency large-flux three-dimensional mass transfer tray can strengthen gas-liquid mixing and effectively control entrainment of mist, and will help to simultaneously realize high efficiency and large flux of the plate tower.

The application discloses a continuous production process and equipment for a trifluoromethylbenzene tower, and belongs to the field of organic fluorine chemistry. The production process comprises the following steps: S1: continuously feeding trichloromethylbenzene and hydrogen fluoride into a tower reactor connected with a heat exchanger circulating cooling system in a reverse direction, so that a three-stage continuous fluorination reaction occurs in the tower reactor to obtain crude trifluoromethylbenzene, and unreacted hydrogen fluoride is separated into liquid at the top of the tower and then flows back into the tower reactor; S2: the crude trifluoromethylbenzene obtained in the reaction is subjected to nitrogen bubbling in a bubble tower, and then is continuously distilled in a rectifying tower to obtain finished trifluoromethylbenzene; and S3: byproduct hydrogen chloride generated in the fluorination reaction is introduced into a hydrochloric acid tank to obtain hydrochloric acid, and the content of hydrofluoric acid in the hydrochloric acid is less than 1000 ppm. The method can greatly improve the utilization rate of raw material hydrogen fluoride, improve the purity of byproduct hydrochloric acid, reduce the generation amount of waste acid, avoid the sharp change of pressure in the reaction process, and realize large-scale, continuous, stable and safe production of trifluoromethylbenzene.

This invention discloses a process for preparing high-purity vinyl sulfite using a jet-type loop reactor. Based on the jet-type loop reactor, it employs multiple catalytic systems, using ethylene oxide and sulfur dioxide as raw materials, combined with relevant solvents. This invention relates to the field of vinyl sulfite technology. This process for preparing high-purity vinyl sulfite using a jet-type loop reactor enhances gas-liquid mass transfer through an external circulation jet-type loop reactor. Combined with optimized raw material pretreatment, the reaction cycle is shortened to 2.5-3.0 hours, improving efficiency by more than 50% compared to batch processes. The entire process is continuous, with equipment utilization exceeding 85%, suitable for large-scale production of tens of thousands of tons per year. It addresses the shortcomings of existing processes in terms of scalability, achieving high production efficiency and significant scalability advantages. Furthermore, the entire process is a closed loop, preventing sulfur dioxide leakage. Excess sulfur dioxide is recovered, and solvents are recycled, reducing pollutant emissions by more than 80%.

The application discloses a process and equipment for producing silane by chlorosilane disproportionation with combined solid catalyst and liquid catalyst, and the process at least comprises a reaction rectification stage catalyzed by a solid catalyst and a reaction and separation stage catalyzed by a liquid catalyst. The process of the application uses the solid catalyst and the liquid catalyst simultaneously, and combines the homogeneous catalytic reaction rectification and the heterogeneous catalytic reaction rectification, so that the rate-controlling step of the disproportionation reaction is first balanced through primary disproportionation, then the generated intermediate product is subjected to secondary disproportionation, and the silane and the silicon tetrachloride are continuously removed, so that the chemical equilibrium is further transferred to the product site, that is, the limited reaction conversion of the very high or all chemical equilibrium is achieved. The chlorosilane disproportionation reaction which is not favorable to the reaction kinetics is strengthened, the reaction is promoted to reach the equilibrium, and the multiple disproportionation is used to improve the reaction conversion rate.

The present application relates to the technical field of coke oven gas purification, and discloses a microcrystalline material adsorption equipment for coke oven gas purification, which comprises a feeder, a first rectifying tower, a second rectifying tower and a third rectifying tower connected in sequence; a pressurizing machine is used for pressurizing or cooling the coke oven gas during the adsorption process, which is beneficial to the adsorption of adsorbate on the adsorbent; a heater is used for heating the coke oven gas during the adsorption process, which is beneficial to the regeneration of the adsorbent and the process of adsorption separation cycle; the first rectifying tower is used for primary adsorption and fine removal, and active carbon spherical adsorbents are arranged in the first rectifying tower; the second rectifying tower is used for secondary adsorption and fine removal, and iron oxide adsorbents are arranged in the first rectifying tower; the third rectifying tower is used for tertiary adsorption and fine removal, and hydrophobic microcrystalline material adsorbents are arranged in the third rectifying tower. The present application has the advantages of adopting multiple adsorption components to cooperate with graded adsorption, and adopting heating adsorption and pressure swing adsorption to improve the adsorption and regeneration effect on coke oven gas.

The utility model discloses a kind of built-in plate rectifying column condensers, which belong to condensing equipment technical field, including rectifying column main body, condenser pipe and fixed assembly, the upper end of one side of the condenser pipe is equipped with first sealing groove, cold water pipe is fixedly installed in the inside of the first sealing groove, the lower end of one side of the condenser pipe is equipped with second sealing groove, hot water pipe is fixedly installed in the inside of the second sealing groove, spiral heat exchange tube is fixedly connected between the cold water pipe and hot water pipe, the spiral heat exchange tube is located in the condenser pipe, the upper end of the rectifying column main body is fixedly connected with connecting pipe. The utility model is through setting condensing assembly, steam temperature is reduced quickly, realize efficient condensation, ensure that steam is fully converted into liquid, improve the working efficiency of entire rectifying column condensing system, by setting fixed assembly, quickly complete dismounting work, shorten equipment maintenance time, reduce maintenance cost.

The utility model relates to recovery device technical field, concretely is a kind of benzene recovery device, including waste oil buffer tank, waste oil buffer tank is connected with the top of crude benzene crystallization tank by pipeline, the bottom of crude benzene crystallization tank is connected with the top of fine benzene rectifying column by pipeline one, and cooling pipe is wound in side portion, and cooling pipe is connected with freezer;Pipeline one is provided with feed pump;The top of fine benzene rectifying column is connected with fine benzene condenser by pipeline, and bottom is connected with heavy residue discharge pipe;Fine benzene condenser is connected with fine benzene buffer tank by pipeline two;The utility model is through being provided with crude benzene crystallization tank and fine benzene rectifying column, first crystallization comes out crude benzene, and then distills crude benzene, and the fine benzene of distillation comes out, to realize the extraction and recovery of benzene, avoid the waste of resources, reduce cost.

The application discloses a device and method for preparing tert-butylamine by directly ammoniating isobutene, which comprises sequentially connected raw material preparation unit, reaction separation unit, rectification separation unit and circulating recovery unit; the raw material preparation unit is used for storing, mixing and heating raw materials; the reaction separation unit is used for pressurizing reaction of the raw materials in the raw material preparation unit and gas-liquid separation of products; the rectification separation unit is used for rectification separation of liquid-phase products separated by the reaction separation unit and recovery of part of unreacted raw materials; and the circulating recovery unit is used for rectification recovery of part of raw materials of gas-phase products separated by the reaction separation unit. The application has the characteristics of low overall equipment investment, high energy utilization rate, simple product separation and purification, perfect overall device design and small environmental pollution.

The utility model relates to carbon dioxide manufacturing technical field provides a kind of for carbon dioxide production's adsorption tower drying system to handle original carbon dioxide gas, and original carbon dioxide gas refers to the gas with moisture and alcohol after not passing through pre rectification tower rectification treatment, including the first adsorption tower and second adsorption tower of the first heating regeneration component, second heating regeneration component being set respectively, first adsorption tower and second adsorption tower are connected in parallel between liquefier and pre rectification tower;First heating regeneration component and second heating regeneration component all include the molecular sieve of array setting and adsorbent fixed between adjacent molecular sieve, and the heating regeneration process in first adsorption tower and second adsorption tower is independent of each other.The utility model is according to the process of " one open one spare " independent participation handles original carbon dioxide gas, and alcohol removal water in a adsorption tower, not only simplify the treatment process before carbon dioxide gas liquefaction, and improve the alcohol removal efficiency of adsorption tower.

The present application relates to the production field of purified terephthalic acid, and particularly relates to an oxidation process water purification treatment system and a use method thereof, which comprises an extraction tower and a rectifying device, characterized in that a separation device is arranged between the extraction tower and the rectifying device, the separation device comprises: a cooling crystallization device, a feed end of the cooling crystallization device is connected with a raffinate discharge end of the extraction tower, and the cooling crystallization device is used for cooling, crystallizing and filtering PT acid in the raffinate; a heat exchanger, a tube side feed end of the heat exchanger is connected with a discharge end of the cooling crystallization device, and the heat exchanger is used for heating the raffinate; and a filter, a feed end of the filter is connected with a tube side discharge end of the heat exchanger, and a discharge end of the filter is connected with a feed end of the rectifying device, and the filter is used for filtering residual PT acid crystallization, and the present application has the following beneficial effects: the separation device is arranged between the extraction tower and the rectifying device, the raffinate discharged from the extraction tower is cooled, crystallized and filtered, the PT acid content of the raffinate is reduced, and the product quality is improved.

The utility model relates to waterborne polyurethane production technical field discloses a device of residual acetone in high -efficient out of waterborne polyurethane, including the reaction kettle, the reaction kettle side wall fixed mounting has spiral heating pipe, the utility model discloses the setting and the design of stirring blade present V -shaped flying wing shape of stirring mechanism, not only can promote material even heat, accelerate acetone volatilization, can also produce the big shearing force by its edge, effectively break the agglomerate in waterborne polyurethane, prevent local heating temperature too high, the colloid surface moisture volatilization causes the skin, and let residual acetone fully expose, one side through the setting of liquid pumping and spraying mechanism, further greatly increase gas -liquid contact area, more acetone can be fast volatilized, speed up the acetone from waterborne polyurethane in the separation speed, high -efficient realization acetone and other component separation, greatly shorten the processing time, significantly improve acetone removal rate, promote overall production efficiency.

The application discloses a high-purity electronic-grade hydrogen bromide metal ion impurity control device and a control method. The device comprises an adsorption column, a bag-type dust collector and a rectifying tower. First impurity removal mechanisms are arranged at the upper end of the adsorption column and the top of the rectifying tower to remove gas-phase metal impurities. Second impurity removal mechanisms are arranged at the tower kettle of the rectifying tower to remove liquid-phase metal impurities. The bag-type dust collector comprises a flow channel, a keel frame and dust removal bags. Third impurity removal mechanisms are arranged on the flow channel. The dust collector device of metal ions is added to the existing process system, and the structure is designed to realize solid-liquid separation of liquid to intercept metal particles. The structures of the adsorption equipment and the rectifying equipment are designed to remove gas-phase metal impurities and liquid-phase metal impurities, thereby increasing the removal efficiency and effect of metal particles.

This invention relates to the field of recovered liquid treatment technology, and discloses a process for separating amines from NMP recovered liquid, comprising the following steps: Step S1: The NMP regenerated liquid is injected into a dehydration tower in a purification device for dehydration distillation; Step S2: The dehydrated NMP regenerated liquid is injected into a distillation device for secondary dehydration distillation; Step S3: The water and light components such as amines separated in the distillation device are collected using a side-collection method; the distillation device includes a distillation tower, which has multiple sets of packing materials fixedly installed inside and a feed pipe connected to the side of the distillation tower. The beneficial effects of this invention are: it allows the solution in the middle of the collection pan to enter the area between the two sets of separating rings in the side-collection pipe, reducing the probability of sediment and floating matter entering the side-collection pipe; simultaneously, the solution being extracted is in an isolated state, improving the purity of the extracted solution.

The present application relates to a kind of preparation methods and systems of electronic grade dimethyl carbonate prepared from dimethyl oxalate, the method comprises the following steps: dimethyl oxalate is preheated and sent into decarboxylation reactor to carry out decarboxylation reaction, carbon monoxide, dimethyl carbonate and other light components are extracted from the top of decarboxylation reactor, and heavy components are extracted from the bottom of decarboxylation reactor;Carbon monoxide, dimethyl carbonate and other light components extracted are separated after gas-liquid, and liquid phase dimethyl carbonate is sent into rectifying column to carry out rectification purification;Electronic grade dimethyl carbonate product is obtained by crystallization purification in refrigeration crystallization device after rectification, and crystallization mother liquor returns rectifying column;Decarboxylation reactor is three-stage reaction tower, and rectifying section, reaction section, stripping section are sequentially from top to bottom.The present application is completely reacted by the design of three-stage decarboxylation reactor;Heavy components generated are extracted in real time, and catalyst stability is high;Electronic grade DMC is prepared by using rectifying column coupled with crystallization tower, and the yield of DMC is significantly improved.

A rectification integrated device for preparing phase change material from fischer-tropsch wax, which is characterized in that a tower top gas pipe (102) is connected to the top of a tower body (101) and penetrates a tower cavity (110), a preheating and dewatering assembly (3) is arranged on a conveying pipe (202), the preheating and dewatering assembly (3) comprises a flash tank (301), a fixed bin (308) is arranged at the top of the flash tank (301), a negative pressure generating assembly is arranged at the top of the fixed bin (308) and is used for establishing a negative pressure environment in the inner cavity of the flash tank (301), the application discloses a rectification assembly with preheating and dewatering functions, the tower top steam of the tower body itself is used as a heat source, and dewatering is strengthened under negative pressure, so that external energy consumption can be greatly reduced, thereby ensuring the stable operation of the tower body and the purity of the phase change material product, and the device integrates the functions of preheating, dewatering and negative pressure extraction in a single equipment, so that the equipment area and investment cost are reduced.

This utility model belongs to the field of trimethylamine removal technology, specifically relating to a trimethylamine removal device, including a deamination tower bottom liquid cooler, a deamination tower reboiler, and a deamination tower condenser. The deamination tower reboiler and condenser are both connected to the deamination tower bottom liquid cooler via pipelines. A pressure relief pipe is connected to the deamination tower bottom liquid cooler, and a connecting nozzle is threaded onto the inner side of the upper opening of the pressure relief pipe. A pressure relief port is fixedly connected to the top of the connecting nozzle. By setting up the deamination tower bottom liquid cooler, reboiler, and condenser, online removal of trimethylamine is achieved. The pressure relief pipe on the deamination tower bottom liquid cooler utilizes a coordinated design of a tapered tube, elastic band, and plug to achieve rapid pressure relief of the trimethylamine gas. When the pressure inside the tower exceeds a threshold, the gas pushes open the plug to release pressure. After the pressure decreases, the elastic band automatically pulls back the plug to seal, requiring no manual intervention.

The utility model relates to temperature control device technical field especially a fractionation temperature control device, including base, the top of base is installed fractionation tower through the support leg, the side of fractionation tower is installed feed pipe, and install several discharge pipes on the other side of fractionation tower, the top of fractionation tower still is installed gas pipe, the top of base is installed conveying pump, the feed inlet department of conveying pump is installed first discharge pipe, the top of first discharge pipe is linked with the bottom of fractionation tower, the discharge port department of conveying pump is connected with second discharge pipe, the other end of second discharge pipe is fixed on the side of shell, and the shell is fixed on base. The application can wrap up the outer surface of second discharge pipe and feeding pipe through heat shield and heat preservation pad, so that the oil liquid conveyed in second discharge pipe and the steam heat conveyed in feeding pipe will not be quickly lost to the external environment, which can improve the temperature control precision of crude oil fractionation and improve the use effect.

This invention relates to the field of tetrahydronaphthalene hydrogenation technology, and in particular to a high-efficiency tetrahydronaphthalene hydrogenation device, comprising: a reaction vessel, a pressure reducing valve, a separator, a distillation vessel, and pipelines; the reaction vessel is connected to the pressure reducing valve via pipelines, the pressure reducing valve is connected to the separator via pipelines, the separator is connected to the distillation vessel via pipelines, and the distillation vessel is connected to the reaction vessel via pipelines; the reaction vessel includes a shell, a nitrogen filling port, a pressure boosting port, a vacuum port, a drive motor, a feed port, a hydrogenation port, a catalyst port, and a discharge port; this invention enables tetrahydronaphthalene to react with hydrogen while simultaneously charging the reaction product into the distillation vessel for distillation during hydrogenation catalysis, eliminating the need for batch-by-batch reaction of tetrahydronaphthalene. Through continuous hydrogenation reaction and distillation, the overall process time is shortened, significantly improving the efficiency of the tetrahydronaphthalene hydrogenation reaction.

The utility model relates to rectifying device technical field especially a kind of pyridine methanol rectifying device of stable assembly type, including base, the top side of base is equipped with support frame, the side of support frame is equipped with several mutually superposed tower tubes, the both ends of each tower tube are equipped with flange, two adjacent flanges are connected by bolt, the side of support frame is equipped with several fixed plates, the one end of each fixed plate is arc-shaped setting, and the one end of each fixed plate is stretched to the both sides of tower tube, the side of each fixed plate is connected with first arc-shaped connecting plate and second arc-shaped connecting plate. First arc-shaped connecting plate and second arc-shaped connecting plate can be connected with the flange on each tower tube in the application, and first arc-shaped connecting plate and second arc-shaped connecting plate are also connected on support frame by fixed plate, so that each tower tube can be supported by support frame, so that the pressure received by each tower tube is same, and assembly stability is improved.