192results about How to "Less fixed investment" patented technology

The invention discloses a novel supercritical carbon dioxide coal-fired boiler. The novel supercritical carbon dioxide coal-fired boiler comprises a horizontally arranged hearth, a wall-attached radiation cooling heating surface system, a superheater and reheater system, smoke gas coolers and air preheaters, wherein the wall-attached radiation cooling heating surface system is arranged in the hearth in a graded and segmented mode, the superheater and reheater system is arranged in a horizontal flue in a graded mode, and the smoke gas coolers and the air preheaters are arranged in a tail flue in a graded and flow-dividing mode. The wall-attached radiation cooling heating surface system greatly reduces the length of a high-temperature working medium pipeline, and reduces the number of needed high-temperature convection heating surfaces and high-temperature alloy pipelines, thereby reducing fixed investment of equipment. The superheater and reheater system combines with turbines which are arranged in a multi-stage and multi-axis mode, so the air inlet temperature and the turbine efficiency of the turbine of each grade can be improved. The tail flue comprises an upper-grade smoke gas coal economizer and a lower-grade smoke gas coal economizer which are used for heating a new working medium to meet requirements of an inlet of a primary wall-attached radiation cooling heating surface of the boiler, and the upper-grade air preheater and the lower-grade air preheater are used for heating combustion air, so that the special requirements for hearth combustion and heat transfer of the supercritical working medium circulation are met.

The invention relates to a technology for producing coal-series needle coke by taking middle-temperature and low-temperature coal tar asphalt as a raw material. The technology mainly comprises the following steps: carrying out decompression and distillation, and extraction and removal on middle-temperature and low-temperature coal tar; combining hydrogenation treatment, thermal polymerization andcalcining technologies under the action of a non-metal homogeneous mild-hydrogenation catalyst to prepare the coal-series needle coke with good performance and relatively high yield. The non-metal homogeneous mild-hydrogenation catalyst is mainly prepared from the following raw materials in percentage by mass: 55 weight percent to 79 weight percent of semi-coke, 20 weight percent to 40 weight percent of coke and 1 weight percent to 5 weight percent of graphene. According to the technology provided by the invention, after the raw material is subjected to combined pre-treatment, a refined asphalt raw material is reasonable in constitution and has a few of impurities; the catalyst has excellent modification performance and does not need to be separated subsequently; the graphene component also can be used for promoting a middle phase in a thermal polymerization process to form a wide-area and ordered fibrous structure and a high-performance needle coke product is easy to form.

The invention relates to a novel method for synthetizing vinyl acetate by a calcium carbide acetylene method, which is characterized in that synthetic reaction is carried out on acetylene gas produced by adopting calcium carbide and acetic acid in a tube array type fixed bed reactor. The novel method is realized by utilizing a fixed bed technology in a process for synthetizing the vinyl acetate by the calcium carbide acetylene method, and especially, acetic acid simultaneously enters a gas-liquid mixed evaporator under the action of the acetylene gas after being preheated by changing an acetic acid feed mode into a gas-liquid mixed feed mode, and then enters the reactor through a second preheater and a third preheater, and the gas mixture passes through an inert heat transfer filler and then passes though a corresponding catalyst to be synthetized into the vinyl acetate. By adopting the mode, the novel method can reduce reaction byproducts and has the advantages of easy separation, raw material use ration improvement, production cost reduction, conversion rate improvement, small investment, high product purity, high quality and low impurity content.

A method and apparatus for polishing the mirror surface by use of dual grinding heads is disclosed. Said apparatus features that the polishing abrasive bands and the lathe are used. Said method features dry polishing without any liquid.

The invention relates to a high and low-temperature Fischer-Tropsch synthesis co-production technology which is characterized in that the high-temperature Fischer-Tropsch synthesis technology and the low-temperature Fischer-Tropsch synthesis technology are coupled; a coal gasifying and purifying unit is adopted to produce synthetic gases; the purified synthetic gases (CO+H2) enter a high-temperature Fischer-Tropsch synthesis unit and a low-temperature Fischer-Tropsch synthesis unit at different ratios of CO to H2 respectively; and the crude products obtained by the high-temperature Fischer-Tropsch synthesis unit and the low-temperature Fischer-Tropsch synthesis unit form a mixture flow which enters the subsequent oils deep-processing unit and hydrocarbon gas downstream processing unit according to the characteristics of different crude products to produce gasoline, diesel oil, synthetic lubricating oil, polypropylene, polyethylene and high value-added alpha-olefin. The technology provided by the invention avoids the uncertainty of the oils market under the fluctuation of the international crude oil market, realizes balance of the oils income by use of the income of chemical products, and finally achieves the aim of enhancing the competitiveness of the Fischer-Tropsch synthesis oils.

The invention discloses a clean production method of natural gas, which is composed of the following steps: (1) addition of an ice inhibitor: adding an ice inhibitor liquid or the ice inhibitor into natural gas or/and a natural gas flow channel so that the ice inhibitor liquid or the ice inhibitor is contacted or mixed with the natural gas or/and gas-phase water, liquid-phase water, ice or/and natural gas hydrates in the natural gas flow channel to form sewage containing the ice inhibitor; and (2) ventilation for water removal: evaporating the water in the ice inhibitor sewage in a ventilating manner and recycling the ice inhibitor liquid or the ice inhibitor from the ice inhibitor sewage. The method solves the problem of influence on natural gas exploitation and production due to natural hydrates or ice, can solve the problem of environment pollution and energy consumption during the natural gas exploitation and production, can eliminate safety risk in the natural gas exploitation and production, can reduce fixed investment, cost and energy consumption in the natural gas exploitation and production, is easy to carry out, is safe and reliable, is wide in application and is easy to popularize, and has significant economic benefit, environment protective benefit and safety benefit.

The invention discloses a method for preparing taurine and co-producing bicarbonate. The method comprises the step of leading carbon dioxide gas or adding a carbon dioxide water solution to an amino ethyl sulfonate water solution of alkali metal or ammonium to regulate a pH value so as to obtain the taurine and the bicarbonate. The method can replace an existing taurine preparation method of using sulfuric acid or sulfur dioxide to regulate the pH value, meanwhile can treat boiler exhaust gas, turns the carbon dioxide in the exhaust gas into wealth, co-produces the bicarbonate and is a safe, environmentally-friendly and energy-saving method for producing the taurine and co-producing the bicarbonate.

The invention discloses a complete recovery system for iso-pressure blow-off gas at blast furnace top. The complete recovery system comprises a furnace top charging bucket of a blast furnace, a cyclone dust collector, an ejector and a bag-type dust collector, wherein the furnace top charging bucket is communicated with the cyclone dust collector through a first pipe; an outlet of the first pipe iscommunicated with an inlet of a three-way joint; a first outlet of the three-way joint is communicated with a second pipe; the ejector and a forced recovery valve are arranged on the second pipe; anoutlet of the ejector is communicated with an inlet of the bag-type dust collector; an outlet of the bag-type dust collector is communicated with a purified gas pipe network; a natural recovery valveis arranged on a third pipe, and an outlet of the third pipe is communicated with an inlet valve of the bag-type dust collector; a second outlet of the three-way joint is communicated with a fourth pipe. The invention further discloses a complete recovery method for the iso-pressure blow-off gas at the blast furnace top. The complete recovery system and method for the iso-pressure blow-off gas atthe blast furnace top have the following beneficial effects: two recovery measures are taken correspondingly according to the change of pressure in the furnace top charging bucket, environmental pollution and resource waste caused by direct blow-off of iso-pressure gas into the atmosphere are avoided, and the requirements for energy saving, emission reduction and environmental production are met.

The invention provides a method for treating heavy metal wastewater through electric flocculation-chemical precipitation. The method comprises the following steps: regulating the pH value of wastewater, performing electric flocculation treatment in an electric flocculation reactor for 30-60 min, adding a settling agent for sedimentation for 10-30 min and then discharging water. According to the method for treating heavy metal wastewater through electric flocculation-chemical precipitation, provided by the invention, heavy metal wastewater containing trace heavy metal ions is firstly subjected to electric flocculation, ions produced by electrolysis are hydrolyzed to produce a great deal of polyhydroxy compounds, the polyhydroxy compounds are subjected to reaction, absorption and chelation with trace heavy metal ions, therefore a large proportion of heavy metal ions can be gathered, and besides, the settling agent is added for further gathering the heavy metal ions, the settling agent has a synergistic effect with the electrochemical floccules, and at the same time the obtained flocculating constituents start to precipitate, finally, the obtained effluent can be enabled to meet the emission standard.

The invention belongs to the technical field of smelting of copper-lead mixed smelting slag in the non-ferrous metal metallurgy industry, and in particular relates to a process and a device for producing two main products, namely crude copper and crude lead, in the treatment period of copper-lead mixed slag through a bottom-blowing bath smelting technology by using a single piece of equipment. The lead-copper mixed slag is treated through a one-step smelting furnace to produce the crude lead, the crude copper, waste slag and the like. The crude copper and the crude lead are produced as final system products. Iron-silicon-calcium slag is produced in the smelting process, and furnace slag which meets requirements of the waste slag can be comprehensively utilized as raw materials of a building material factory. The process is single in equipment, short in process route, high in heat utilization rate, friendly to smelting environment, easy to operate and high in labor productivity; the automatic process control is easily realized. The process and the device conform to a concept of circular economy and meet the development trend of the energy conservation and emission reduction industry.

The invention discloses a method for comprehensively using water and manganese slag in electrolytic manganese production. The method includes the steps that the manganese slag is subjected to slurry washing through catholytes and the water, and the manganese slag and filter liquor are respectively obtained and recycled; manganese of the manganese slag is firstly recycled, then ammonium salt and magnesium salt are recycled, and finally all the manganese slag can be used for building cement materials; and the water is firstly used for washing the manganese slag, then used for cleaning a bath and washing a membrane bag, and finally used as liquid making supplementary water and ammonia washing water, and full resource efficient use is achieved. According to the method, fixed input is low, recycling cost is low, quite high economic benefits and quite high environment-protection benefits are achieved, and the important effect is achieved on achieving high-standard clean production of the electrolytic manganese industry.

The invention discloses a natural gas production method, which comprises following steps (1) a thermal insulation oil pipe is arranged in a gas well shaft sleeve or an oil pipe, and (2) natural gas is enabled to rise to a well opening through the thermal insulation oil pipe. When the natural production method is applied to natural gas production, natural energy can by fully used to produce natural gas, temperature of the well opening of the natural gas well can be remarkably improved, the problem that hydrate can affect production of natural gas is effectively resolved, production processes that natural gas is not heated and pressurized is achieved, heating of a heating furnace and pressurization concentration transportation of a compressor can be eliminated, and production cost and energy consumption of production of natural gas can be greatly reduced. The natural gas production method has the advantages of being easy to operate, safe, reliable and the like.

A base station power supply network system comprises a core power supply network which is formed by sequentially connecting a plurality of base stations to form an annular loop. Each base station comprises an AC/DC (Alternative Current/Direct Current) two-way DC-DC converter, a detection module and an energy balance module, wherein the AC/DC two-way DC-DC converter is used for sending a DC high voltage current to adjacent base stations or receiving the DC high voltage current; the detection module is used for controlling the AC/DC two-way DC-DC converter to send a detection current to the adjacent base stations, and confirming an optimal voltage value and a current value for sending the current through comparing the sent current with the received current; and the energy balance module is used for controlling the local AC/DC two-way DC-DC converter to supply power for a base station with abnormal power fluctuation. The invention further provides a base station emergency power supply method. According to the base station power supply network system and the base station emergency power supply method, base station power supply systems which are mutually independent originally are connected to form an annular power supply network, and each base station in the network can obtain power supply support from all other base stations.

The invention discloses a method for preparing ferric oxide yellow pigment by waste iron hydrochloric acid lotion, which adopts a wet oxidation method. The method comprises the following steps: processing the waste iron hydrochloric acid lotion; preparing a crystal seed; fading red; carrying out two-step oxidation; pressing and filtering; and drying. The method can rapidly and simply process the waste iron hydrochloric acid lotion with lower ferrous concentration, more impurity iron content and higher acidity, which is discharged by industries, such as metallurgy, steel, machinery, chemistry,pharmacy, and the like, the waste iron hydrochloric acid lotion can reach the Chinese allowed discharge standard, and the ferric oxide yellow pigment which can be used for industries, such as construction, paint, and the like is prepared.

The invention discloses a process for preparing manganese sulfate by a high-temperature crystallization method and an automatic continuous production device. The process comprises the following steps: adding manganese sulfate solution which is impurity-removed and purified to a preheating kettle, and heating the added manganese sulfate solution to 90-100 DEG C by the preheating kettle; adding the heated manganese sulfate solution into a high-temperature crystallization kettle, and heating the added manganese sulfate solution to 160-180 DEG C in the high-temperature crystallization kettle for high-temperature crystallization; then adding the manganese sulfate solution of high-temperature crystallization into an automatic discharge centrifuge, putting a centrifuged water manganese sulfate crystal into a silo, and then obtaining a water manganese sulfate crystal through the drying of an air flow dryer unit. The process for preparing the manganese sulfate by the high-temperature crystallization method and the automatic continuous production device have the advantages that the production process is advanced; the design is scientific and reasonable; the safe, automatic and continuous production can be realized; the fixed investment is less; the labor intensity is reduced; the energy consumption is greatly reduced; the water consumption and production cost are saved, especially the water consumption and production cost of high-purity manganese sulfate production are saved; because soluble impurities are dissolved and saved in the mother liquor, several-time recrystallization is not required.

The invention discloses a comprehensive recovery method for rare earth, aluminum and silicon in aluminum-silicon waste. The method comprises the following steps that 1, the aluminum-silicon waste is subjected to acid leaching to obtain acid leaching liquid containing rare earth and aluminum and silicon-rich slag; 2, a precipitant is added into the acid leaching liquid containing the rare earth and the aluminum, and rare earth compound salt precipitate and aluminum-containing filtrate are obtained; and 3, sodium metaaluminate or aluminum sulfate is prepared from the aluminum-containing filtrate. By means of the method, rare earth and aluminum are thoroughly separated, the yield and purity of the rare earth and the aluminum are greatly improved, meanwhile, valuable recovery of silicon is completed, and comprehensive recycling of main elements in the aluminum-silicon waste is truly achieved. The recovery technological process has the advantages of being low in alkali consumption, low in water consumption, low in waste water discharge amount and the like, and meanwhile has the characteristics that the fixed investment is low, the production cost is low, and industrialized production can be easily achieved.

The invention is a mask-print based metal wiring method. It comprises: using a board coated with or pressed with a metal layer as the basal body, and using an etching resistance protectant as the print materials; using a printer as the apparatus for positioning and distributing the print materials; constructing a patterned protection layer on the metal layer; using chemical etching approach to form the metal lines and pattern on the basal body.

The invention provides a combined crushing device. Specifically, a crusher, a belt, a feeder, a power system, and a walking system are composed into the small combined crushing device. The power system can adopt electric power, and also can use of diesel and gasoline as power. The processes of charging, feeding, crushing, transporting, stacking are completed by one device. And the walking system is disposed to realize walking by making use of the power of the device. Or other power machinery can be utilized to perform transfer to a new crushing operation site conveniently. The device provided in the invention has the characteristics of compact structure, convenient use and high degree of automation, saves crushing operation site, reduces repeated fixed investment of equipment, and improves labor productivity.

A process for antistaling the raw juice of wolfberry fruit at ordinary temp includes choosing fresh wolfberry fruits, washing, immersing in solution of potassium permanganate at pH=3-6.5 disinfecting in solution of peracetic acid, squeezing juice, and adding an invented antistaling agent. Its advantages are no toxicity and by-effect, natural wolfberry fruit juice, long storage period at ordinary temp (2 years) and low cost.

The invention discloses an energy-saving environment-friendly copper-containing sludge smelting method, and belongs to the field of pyrometallurgy. The method is characterized in that copper-containing sludge, lime and powdered coal are proportionally and uniformly mixed, then, black copper and fused slag are obtained through pelletizing, rotary kiln drying sintering and smelting furnace smelting, the black copper and the fused slag are separated in a forehearth, the black copper is sold as a copper smelting raw material, the fused slag serves as a raw material for making cement or bricks after being subjected to water quenching, and smelting smoke is exhausted through a chimney after being processed through cyclone dust collection, cloth bag dust collection, dual-alkali desulfuration and demisting of an electric demister to reach the standard. Heat required by rotary kiln drying sintering is obtained from waste heat of forehearth smoke and smelting furnace smoke preferably, and when waste heat is insufficient, heat is supplemented by burning natural gas, coal gas or heavy oil; heat is supplied to the forehearth by burning the natural gas, the coal gas or the heavy oil, air is preheated and burned with assistance of high-temperature smoke exhausted from the forehearth so that the burning temperature of fuel can be increased. According to the smelting method, energy utilization is sufficient, the fixed investment is small, the occupied area is small, the production operation cost is low, and social, economic and environmental protection benefits are remarkable.