47results about How to "Flexible process control" patented technology

The invention relates to the technical field of porous ceramic materials and film separation, in particular to a low-temperature sintering acid and alkali resistant porous silicon carbide ceramic filmand a preparation method thereof. The method sequentially comprises the following steps of (1) support body manufacturing; (2) transition layer processing; (3) filtering layer processing; (4) film sintering process. The method provided by the invention has the characteristics that the sintering temperature is low; the production energy consumption is low; the process method is simple; the equipment requirements are low; the production cost and the investment cost are low; the control is flexible; the shaping is easy; the method is suitable for industrial customization and meets the scaled production. The porous silicon carbide ceramic film produced by the method has the characteristics of good hydrophilcity, great filtering flux, high porosity, high filtering precision, high mechanical intensity, good acid and alkali resistant performance and long service life.

This invention relates to a new process for refining calcium carbonate filler from white mud. The process comprises: preparing the raw materials, washing, roughly screening, homogenizing, deflocculating, carbonizing, finely screening, and storing. In the process, homogenizing, deflocculating, carbonizing are accomplished in a single step. Calcium carbonate has a particle size D50 of 3.0-7.0 mums, and an average particle size of 5.5-8.5 mums. The recovered lightweight calcium carbonate has whiteness higher than 89% ISO, Ph value of 8.4-10.5, sedimentation volume greater than or equal to 2.6 mL/g, and slurry calcium carbonate concentration of 14-16%. The product is qualified for use in high-class writing paper, and the cost is only 1/3 that of commercialized lightweight calcium carbonate.

The invention discloses biphase calcium phosphate (BCP) composite powder synthesized by a high-temperature solid phase reaction. BCP powder is biphase composite powder prepared from hydroxyapatite (HA) and beta-tricalcium phosphate (beta-TCP), in which the molar ratio Ca/P of calcium to phosphorus is 1.5 to 1.67, wherein the value ranges of the relative mass percent of HA and beta-TCP two phases are each 1 to 99 percent; the sizes of crystalline grains of the HA and beta-TCP two phases are 20nm to 300 microns; the crystallinity is 50 to 100 percent. The invention also discloses a preparation method of the BCP composite powder synthesized by the high-temperature solid phase reaction. The BCP composite powder is prepared through the high-temperature solid phase reaction of a calcium-containing solid compound and a calcium-phosphorus solid containing compound. The BCP composite powder has the advantages that a reaction period is short; the costs of raw materials are low; the equipment investment is low; no waste gas and waste water are discharged; further, the proportion of the HA and beta-TCP two phase in the BCP powder is easily regulated and controlled at the same time; the two phases are distributed uniformly; the sizes of the crystal grains and the crystallinity are controllable; finally; the production requirement that the compression strength of BCP biphase composite ceramic is improved or a degradation speed is regulated and controlled is met.

The invention is an improvement of a coking waste water treatment method. The method comprises steps of oil removal, impurity removal, electrolytic disintegration and A / O technology, and is characterized in that a biological hydrolysis acidification is set after electrolytic disintegration and before A / O technology; the electrolytic disintegration is electrode energizing aerobic strong electrolysis; the A / O technology employs butterfly jet aerators that are arranged in large intervals and have circulating pumps; the waste water is treated with aeration, aeration stopping and forced internal circulation, stationary deposition and water draining period processing successively, so as to realize biological oxidation and nitration-denitrification in a same pool. Cooperative effects and coordination of each technology increase treatment effect, and treated outlet water can stably reach COD no more than 100mg / l and NH3-N no more than 15 mg / l; besides, land occupation is saved undera same treating capacity and is only 80% of that of a common technology; operating cost of per ton of water is low; and a treatment effect is stable.

The present invention discloses an integrated gate commutated thyristor. The said gate commutated thyristor includes n-type substrate, p-type doped region, n-type doped region, anodic p+ doped region of the gate commutated thyristor, diode n+ buffer region, and cathode paling of gate commutated thyristor, and also includes cathode and gate of the gate commutated thyristor, anode of the diode, anode of the gate commutated thyristor and cathode of the diode. The present invention has characters: n+-type isolating ring is set between the p-type doped regions of the gate of the gate commutated thyristor and the anode of the diode. The integrated gate commutated thyristor and its processing method can achieve effectively isolation between GCT element and the diode.

In order to allow for more flexible process control of a transport apparatus in the form of a long stator linear motor, in particular in order to at least intermittently increase the maximum achievable speed of a transport unit without changing the energy-related basic conditions (maximum current or maximum voltage) of the transport apparatus, according to the invention, in order to change a magnetic flux in the magnetic circuit during movement of the transport unit along the transport route, a magnetic reluctance of the magnetic circuit is changed and/or a magnetomotive force of the magnetic circuit is changed on the transport unit.

The invention relates to the field of petrochemical production and discloses a preparation method of low carbon olefin. The method comprises the following steps of: (1) heavy oil is contacted with andseparated from supercritical carbon dioxide to obtain a light fluid phase containing light oil and carbon dioxide, and a heavy fluid phase containing heavy oil; (2) the light fluid phase containing the light oil and carbon dioxide undergoes component separation to obtain light oil and carbon dioxide; and (3) the light oil is subjected to steam thermal cracking to obtain low carbon olefin. Throughthe above method, the heavy oil can be fully utilized, the problem of the shortage of the petrochemical raw material can be alleviated, and a cracking device can be operated for a long time. Moreover, in the preparation method of the invention, carbon dioxide is used, which not only avoids the greenhouse effect caused by the emission of carbon dioxide into the atmosphere but also recycles the carbon dioxide to achieve the effect of synergistic emission reduction.

The invention relates to the field of porous ceramic materials, and specifically relates to a dual-gradient pore-structure sialon and silicon carbide combined membrane tube and a preparation method thereof. The membrane tube material is composed of sialon and silicon carbide. The membrane tube has a dual-gradient filtering structure composed of a support body layer and a surface membrane layer. The support body layer is composed of a combination of sialon produced through a reaction and coarse silicon carbide grains, and has an average pore size of 10-50mum. The surface membrane layer is composed of a combination of sialon produced through a reaction and fine-particle silicon carbide grains, and has an average pore size of 0.1-5mum. An overall porosity of the membrane tube is within a range of 40-50%. The preparation method of the membrane tube sequentially comprises the steps of material preparation, support forming, membrane layer preparation and firing. Isostatic pressing is adopted in the forming step, wherein a forming pressure is controlled at 100-150MPa. The firing temperature is controlled at 1650-1850 DEG C, and a temperature maintaining time is 3-5h. The method is easy to realize. With the method, product performance can be ensured. The membrane tube provided by the invention has the advantages of high application temperature, high acid corrosion resistance and high alkali corrosion resistance. The membrane tube can be used in filtration purification of various fluids with high temperature or low temperature, such as high-temperature high-press gas filtration dedusting, water purification and the like.

The invention relates to a treatment method for dehydrating and upgrading high-moisture and high-volatile low-rank coal, and discloses a method for preparing blast furnace blowing semicoke by upgrading low-rank coal based on a high-pressure hydrothermal reaction, wherein the method comprises four steps of low-rank coal pretreatment, high-pressure hydrothermal upgrading, waste heat recycling and upgraded semicoke dehydration and drying. According to the method, low-heat-value low-rank coal is converted into high-quality blast furnace blowing upgrading semicoke by utilizing a high-pressure hydrothermal reaction upgrading technology, wherein the moisture content of the semicoke air drying base is less than 6%, the volatile component content is less than 25%, the Hardgrove grind ability indexis greater than 60, the high-order heat generation value is greater than 24000 kJ/kg, soluble potassium salt, sodium salt and sulfate components in ash are dissolved out, the organic sulfur in coal iseffectively separated out, and the upgraded semicoke can meet the performance index requirements of coal for blast furnace blowing; and the method provided by the invention effectively solves the problems of high water content, high volatile component content, low heat value and high harmful element content of blast furnace blowing of low-rank coal, and provides a clean, efficient, low-energy-consumption and high-added-value low-rank coal upgrading utilization method.

The invention provides a preparation method of a chemical reaction type cold patch asphalt mixture. According to the preparation method, a proper amount of a special diluent is doped into asphalt to reduce the viscosity of the asphalt so as to enable the cold patch asphalt mixture to be constructed at normal temperature, a chemical reactant is doped into the asphalt mixture, and after a pavement is repaired, the chemical reactant can react with the special diluent, so that not only is the bonding effect between the asphalt mixture improved, but also the cold patch asphalt mixture has better construction workability. In addition, a calcined product prepared by calcining CaCO3, SiO2 and Fe2O3 can be slowly hydrated after construction of the cold patch asphalt mixture to generate Ca(OH)2, the chemical reactant and oleic acid are promoted to continuously react to generate fatty acid salt, and the resultant can be used for filling gaps of the mixture, so that the structure of the asphalt mixture is denser, and the water stability and the later strength of the mixture can be improved.

The invention provides a system and method for producing fuel chemicals by conducting solar high-temperature thermal-coupling on methane. The method includes the steps of introducing CO2-enriched gasinto a first high-temperature thermochemical reactor, carrying out a thermochemical decomposition reaction to produce a gas mixture of CO and CO2 and first oxygen under irradiation of first sunlight,and making the gas mixture of CO and CO2 sequentially pass a first temperature reducing device and a CO2 removal device to become CO-enriched gas; introducing water vapor into a second high-temperature thermochemical reactor, carrying out a thermochemical decomposition reaction to produce a gas mixture of water vapor and H2 and second oxygen under irradiation of second sunlight, and making the gasmixture of water vapor and H2 sequentially pass a second temperature reducing device and a dewatering device to become H2-enriched gas; after mixing methane-enriched gas with the first oxygen and thesecond oxygen, carrying out a reaction in a methane partial-oxidation reactor to produce synthesis gas; mixing the synthesis gas, the CO-enriched gas and the H2-enriched gas to be introduced into a fuel chemical synthesis tower for reacting to obtain the fuel chemicals.

The invention relates to a method for realizing flexible process control of atomic layer deposition coating equipment. The flexible process control is realized by making a process file for controllinga film forming process of the atomic layer deposition coating equipment. The method comprises the following steps of: recording process information in a process text file mode, wherein the process information can be adjusted by modifying a self-defined text in the process text file; compiling the process text file through a compiler, and converting the process text file containing the process information into a rule file which accords with a program definition of a controller; and identifying and processing the rule file through the controller, and controlling the working state of the atomiclayer deposition coating equipment according to the rule file, so that the atomic layer deposition coating equipment executes the process information contained in the rule file. The method has the advantages that: a process worker directly modifies the process file without modifying a control program, so that error hidden dangers generated in the communication process are avoided, the design and test time of the control program is saved, and the process development efficiency is improved.