31results about How to "High interest rate" patented technology

This invention discloses a kind of high-efficiency compensating three-phase imbalanced load and reactive power apparatus. It concludes: three-phase current of three-phase electric system, three-phase voltage sampling circuit, power controller and different three-phase compensating elements controlled by the power controller. According to the sampling results, the power controller controls each unidirectional switch of three-phase compensating elements of different topological structure respectively. It makes them can either compensate together or compensate solely; it can either compensate reaction or balance action; it can either use for static compensating or use for dynamic compensating; it can either adjust three-phase current of adjust three-phase imbalanced voltage. It can be used for improving and replacing the reactive compensation apparatus of the three-phase-four-line mode imbalanced load electric system.

The invention relates to a light hydrocarbon isomerization method. Isomerization reaction is performed for light hydrocarbon raw material in an isomerization reactor at the front part, gas-liquid separation is performed for the outlet stream of the reactor at the front part, the obtained liquid phase stream is separated in an isohexane removing tower, the overhead stream mainly comprising C5 cut fraction and dimethyl C6 alkane is mixed with the bottom stream mainly comprising C7 and cut fractions more than C7 so as to be used as isomate to enter into a gasoline stabilizer, the side stream mainly comprising C6 n-alkane and monomethyl C6 alkane is led into an isomerization reactor at the rear part; after the reaction stream of the isomerization reactor at the rear part is separated, the liquid phase stream all returns and is mixed with the liquid phase stream of a gas-liquid separator of the isomerization reactor at the front part so as to be used as the feeding of the isohexane removing tower. The method has higher n-alkane isomerization ratio and greatly improves the octane number of the light hydrocarbons raw material because the C6 n-alkane basically realizes the full isomerization.

The invention provides a preparation method of a Ethanamizuril bulk drug, which comprises the following steps: reacting acetaminophen and 2-fluoro-5-nitrotoluene as initial raw materials to obtain a compound II, and carrying out diazotization coupling reaction to obtain a compound IV, wherein the conjugate adopted in the diazotization coupling reaction is a compound III. According to the preparation method of the Ethanamizuril bulk drug, malonic acid monoester monoamide formate is used as a conjugate, acetaminophen and 2-fluoro-5-nitrotoluene are used as initial raw materials, construction ofa triazine ring can be realized more efficiently and mildly, and the obtained target product samipril is higher in yield and purity.

The invention discloses a method for rapidly peeling taros. The method is characterized by including the following specific steps of 1, ripening, wherein a salt solution is heated to 135 DEG C to 160 DEG C, the temperature is kept, and cleaned taros are put into the solution and boiled for 1 min to 3 min; 2, goffering, wherein the taros are rapidly bailed out, put into cold water and soaked for 1 min to 2 min, the temperature is rapidly reduced, it is prevented that taro curing layers are further increased, the huge temperature difference between the insides and the outsides allows peels of the taros to be rapidly wrinkled and fall off, and meanwhile the salt solution attached to the peels of the taros can be removed; peeling, wherein the taros enter a roller-type peeling machine through a conveying belt and are peeled, and the peeled taros are obtained. The method has the advantages that the peeling efficiency is high, losses are small, environment pollution is reduced, the operation cost is low, and the surfaces are smooth and not prone to browning after peeling.

The invention discloses a vacuum distillation method for gradual gasification segmented feed. The method includes: making atmospheric tower bottom oil enter a first stage gasification furnace, conducting heating to make the tower bottom oil enter a first stage flash tank to perform separation, leaving a gas phase to enter an upper fractionation segment of a vacuum tower, and leaving a liquid phase to enter a second stage gasification furnace; heating the liquid phase and making it enter a second stage flash tank, letting the generated gas phase enter a middle fractionation segment of the vacuum tower, and letting the generated liquid phase enter a third stage gasification furnace; heating the liquid phase and making it enter a third stage flash tank, letting the generated gas phase enter a lower fractionation segment of the vacuum tower, and letting the generated liquid phase enter a flash segment of the vacuum tower; and subjecting the feed of each segment to vacuum distillation in the vacuum tower, extracting a lateral line product from a vacuum tower lateral line, and extracting vacuum residue from the tower bottom. The method provided in the invention can substantially enhance the distillate yield of a crude oil vacuum distillation process, reduce equipment energy consumption, increase equipment economic benefits, and save equipment investment.

The invention discloses a device and a method for intelligent sorting and checking of dismounted single-phase electric energy meters. The device comprises a frame; a checking module, a pressing module, an image identifying module and a mechanical screen overturning module are arranged in the frame; the checking module comprises a checking source, a forward and reverse meter detecting sensor, an industrial personal computer, a PLC and an isolation CT; the checking module is connected with a clock, and is connected with the industrial personal computer through a serial port wire; the forward andreverse meter detecting sensor is directly connected with the PLC; the pressing module comprises a pressing socket and an insertion pin; the pressing socket can move in the axial direction of the insertion pin; the image identifying module comprises an industrial camera; the industrial camera is connected with the PLC; and the mechanical screen overturning module comprises an XTZ three-axis manipulator. The device has the advantages of capability of finishing automatic checking and sorting of the dismounted electric energy meters, improvement of the sorting accuracy of the electric energy meters, improvements of the recycling rate of the dismounted single-phase electric energy meters and provision of more reliable and effective checking and sorting modes to electric power measuring properties.

The invention belongs to the field of petrochemical industry, and provides a different pressure distillation apparatus and a process method. The different pressure distillation apparatus main body comprises a pressure increase tower and a pressure reduction tower, wherein a tower bottom oil outlet of the pressure increase tower and a material inlet of the pressure reduction tower are connected through a communication pipeline, and the tower bottom oil outlet is higher than the material inlet. During a different pressure distillation process, raw material oil is heated to a set temperature through a heat exchange network and a heating furnace, and then enters the pressure increase tower, a light distillate oil product is extracted, the tower bottom oil enters the pressure reduction tower through the communication pipeline in a nature flow manner by adopting pressure difference and liquid level difference of the pressure increase tower and the pressure reduction tower, a heavy distillate oil product is extracted, and heavy oil or residue oil is extracted through bottom reduction. Compared to atmospheric and vacuum distillation, the crude oil different pressure distillation has the following characteristics that: the light component is sequentially subjected to vaporization and condensation under pressure increase and pressure reduction operation conditions so as to substantially reduce a crude oil heating temperature, reduce heating, reduce energy consumption, improve an extraction rate, and improve oil product quality; and compared to atmospheric and vacuum distillation, the heavy oil different pressure distillation has the following characteristics that: the light component in the heavy oil is extracted through the pressure increase tower so as to substantially reduce a vapor phase load of the pressure reduction tower, reduce energy consumption, and improve an extraction rate.

The invention discloses a crude oil reduced pressure distillation method for eliminating a choke point in a pressure reduction process. The method comprises the following steps: firstly, performing heat exchange on atmospheric pressure residual oil through an atmospheric pressure furnace convection section and a reduced pressure furnace convection section, raising the temperature by 5-20 DEG C, then feeding the residual oil into a reduced pressure flash column, operating the reduced pressure flash column at 5-30kPa, at the same time, introducing reduced pressure flash column light lube oil as washing oil from the upper part of a reduced pressure distillation column, performing heat exchange on a gas on the top of the reduced pressure flash column, condensing, cooling and directly extracting the gas as a product, extracting the washing oil in the middle of the reduced pressure flash column, feeding the washing oil below a light lube oil extracting plate of the reduced pressure flash column, feeding the flash base oil of the reduced pressure flash column into a reduced pressure furnace, heating to be 370-410 DEG C, feeding into the reduced pressure distillation column through an oil transfer line, performing reduced pressure fractionation, and then extracting products of different fractions from a side line of the reduced pressure distillation column. The method improves the crude oil reduced pressure distillation process, eliminates the choke points of the reduced pressure furnace and the reduced pressure distillation column, reduces energy consumption, improves the treatment capacity and increases the economic benefits of a device.

The invention discloses a method and a device for crude oil deep vacuum distillation. The method disclosed in the invention includes: introducing atmospheric tower bottom oil into a primary gasification furnace, conducting heating and leaving the oil to enter a primary flash tank to undergo separation, making the obtained gas phase enter a vacuum tower upper fractionation section, and letting the liquid phase enter a second stage gasification furnace; heating the liquid phase and making it enter a second-stage flash tank, leaving the obtained gas phase to enter a vacuum tower middle fractionation section, and making the obtained liquid phase enter a third-stage gasification furnace; heating the liquid phase and making it enter a third-stage flash tank, letting the obtained gas phase enter a vacuum tower lower fractionation section, and leaving the obtained liquid phase to enter a vacuum tower flash section; subjecting the feed of each section to vacuum distillation is the vacuum, extracting a lateral line product from a vacuum tower lateral line, and extracting vacuum residual oil from the tower bottom; and introducing part of the vacuum residual oil into the flash tanks of different stages respectively. The method provided in the invention can significantly improve the distillate yield of the crude oil in the distillation process, reduce device energy consumption, increase device economic benefits, and save device investment.

The invention discloses an MTBE (methyl tert-butyl ether) device provided with a safe automatic control system and used for producing polymerized oil and an automatic control method of the MTBE device. The MTBE device comprises a primary polymerization reactor, a secondary polymerization reactor, the safe automatic control system, a primary external circulation heat taking part and a secondary external circulation heat taking part. An old original MTBE device can be used, the utilization rate of equipment is high, and the transformation cost of the device is lower; the primary polymerization reactor and the secondary polymerization reactor are both provided with multipoint remote temperature indicators, and real-time and accurate temperature alarm linkage value can be realized; in the automatic control method, safety measures such as quick cutting-off, timely supplement of inhibitors and emergency tapping of reaction materials during accidents are taken, and the safety of the MTBE device is guaranteed. The primary external circulation heat taking part and the secondary external circulation heat taking part are also newly added, reaction heat is timely removed, and overtemperature of a catalyst bed layer is prevented. The MTBE device is worth popularizing and applying in a polymerized oil device of an MTBE device of a refinery plant.