39results about How to "Big reaction force" patented technology

The invention belongs to the technical field of vanadium extraction and particularly relates to a calcification roasting clinker counter-flow acid pickling vanadium extracting method. To solve technical problems, the calcification roasting clinker counter-flow acid pickling vanadium extracting method is provided. The method comprises the following steps that a, clinker and primary filter liquor and / or secondary lixivium are mixed, sulfuric acid is added for leaching, the pH of a primary leaching process system is controlled to be 2.8-3.5, solid-liquid separation is performed to obtain primarylixivium and solids, and washing is performed to obtain primary filter liquor and solids; b, the solids are subjected to leaching by adopting tertiary lixivium or / and tertiary filter liquor, and the pH of a second leaching terminal system is controlled to be 1.8-3.5, and solid-liquid separation is performed to obtain secondary lixivium and solids; and c, the solids are subjected to leaching, the pH of a third leaching terminal system is controlled to be 1.4-2.2, solid-liquid separation is performed to obtain tertiary lixivium and solids, and washing is performed to obtain tertiary filter liquor and vanadium extracting tailings. The method provided by the invention has the advantages of high leaching vanadium extracting rate and low cost.

The invention relates to a low water-air ratio and middle water-air ratio carbon monoxide (CO) conversion process. The process comprises the following steps of: (1) feeding raw gas into a pre-converter, wherein the temperature of the raw gas entering the inlet of the pre-converter is between 210 and 250 DEG C and the mole ratio of water to dried gas is 0.21 to 0.23; (2) feeding pre-converted mixed gas into a first converter to perform depth conversion, wherein the temperature of the pre-converted mixed gas entering the inlet of the first converter is between 260 and 290 DEG C and the mole ratio of water to dried gas is 0.8 to 1.0; (3) feeding the mixed gas passing through the first converter into a second converter, wherein the temperature of the mixed gas entering the inlet of the secondconverter is between 220 and 250 DEG C and the mole ratio of water to dried gas is 0.5 to 0.7; (4) feeding the mixed gas passing through the second converter into a third converter, wherein the temperature of the secondary conversion mixed gas entering the inlet of the third converter is between 205and 235 DEG C; and performing conversion on the mixed gas by using the third converter to obtain the mixed gas with the CO content lower than 0.40 percent. The process is unique and has the characteristics of high CO conversion rate, low energy consumption in the conversion process and the like.

The invention discloses a method for extracting tungsten from tungsten mineral by using soda and adopting high-pressure leaching process, comprising the following steps: adding soda and additives into primary tungsten autoclaving slag, carrying out secondary autoclaving at high temperature and pressure; separating the leaching solution from the slag; carrying out primary autoclaving to the tungsten by the leaching solution; separating the primary autoclaving slag from the crude sodium tungstate solution, wherein the primary autoclaving slag is used as the raw material; and mixing the tungstate with the secondary autoclaving leaching solution to prepare slurry. The liquid-solid ratio is controlled to be (3-5):1 in the step of adding the soda and the additives into the primary autoclaving slag and mixing to prepare the slurry, and the soda has the excess coefficient of 2.0-2.5. The liquid-solid ratio is controlled to be (3-5):1 in the step of mixing the tungstate with the secondary autoclaving leaching solution to prepare the slurry. The primary autoclaving temperature and the secondary autoclaving temperature are both 170-240 DEG C, the primary autoclaving pressure and the secondary autoclaving pressure are both 0.9-2.8MPa, and the primary autoclaving time and the secondary autoclaving time are both 2-4 hours. The additives are solid caustic soda and alumina. The method adopts the soda to autoclave the tungsten mineral to extract tungsten at counterflow by using soda at high pressure, so that the leaching rate of the tungsten mineral is more than 99%, the content of WO3 in the tungsten slag is less than 1.0%, the use amount of soda is reduced, and the content of soda in the leaching solution is reduced effectively.

The invention discloses a liquid-phase hydrogenation reactor and a hydrogenation method. The liquid-phase hydrogenation reactor includes an inner cylinder and a reactor shell, the inner cylinder is conical, an annular cavity is formed between the inner cylinder and the reactor shell, and the cross-sectional area of ​​the annular cavity gradually increases from bottom to top; the top of the inner cylinder is The upper head is connected to the raw material inlet of the top of the reactor, and the bottom of the inner cylinder is communicated with the bottom of the annular cavity; the middle of the reactor is horizontally arranged with a ceramic membrane nano / micron component, and the ceramic membrane nano / micron component is connected to external hydrogen; the inner cylinder is filled with Hydrogenation catalyst I, the annular cavity is filled with hydrogenation catalyst II, the activity of hydrogenation catalyst I is lower than that of hydrogenation catalyst II; the flow mode of the material in the inner cylinder is from top to bottom; the flow mode of the material in the annular cavity For bottom up. The method of the invention can effectively control the initial activity of the liquid phase hydrogenation reaction and improve the conversion rate in the later stage of the reaction through the internal structure of the reactor, the material flow mode and the catalyst gradation.

The invention discloses a method for preparing light calcium carbonate and magnesium hydroxide from magnesium tailings. A raw material is the magnesium tailings contain 18 to 36 weight percent of calcium oxide. The method comprises the following steps of: crushing and calcining the magnesium tailings to obtain calcined powder and CO2; performing digestion, carbonization and chlorination reaction on the calcined powder and the CO2 in the CO2 atmosphere under the condition of stirring so as to obtain MgCl2-containing solution and light CaCO3 precipitate; and reacting MgCl2 with a precipitator to generate Mg(OH)2 precipitate. In the method, the light calcium carbonate and magnesium hydroxide are prepared from the magnesium tailings discharged in a large quantity and other raw materials so asto solve the problem of environmental pollution and fulfill the aim of fully utilizing calcium and magnesium resources.

The invention discloses a liquid-phase hydrogenation reactor and a hydrogenation process, comprising an inner cylinder and a reactor shell, the inner cylinder is conical, the top and bottom of the inner cylinder are open, the bottom edge is tightly connected with the inner wall of the reactor, and the inner cylinder is open. A number of small holes are opened on the cylinder wall; a ceramic membrane tube bundle is vertically arranged on the axial direction of the reactor, and the ceramic membrane tube bundle communicates with external hydrogen; the inner cylinder is filled with hydrogenation catalyst I, the annular cavity is filled with hydrogenation catalyst II, and hydrogenation catalyst I The activity of the catalyst is higher than that of the hydrogenation catalyst II; the inlet of the raw material of the reactor is connected to the top of the inner cylinder; the flow mode of the material in the inner cylinder is from top to bottom; the flow mode of the material in the annular cavity is from top to bottom. The invention can effectively control the contact time between the material and the catalyst in the whole process of the hydrogenation reaction, make the temperature rise of the catalyst bed more uniform, solve the problems of severe exotherm and inhibit the reaction conversion rate in the reaction process, and realize the whole liquid phase hydrogenation reaction process Both achieve higher hydrogenation reaction rate and conversion.

A device and method for realizing synchronous short-range nitrification and denitrification phosphorus removal to treat urban sewage based on hydroxylamine belongs to the field of biological treatment of urban domestic sewage. The domestic sewage enters the synchronous short-range nitrification and denitrification phosphorus removal reactor through the inlet pump. In the synchronous short-cut nitrification and denitrification phosphorus removal reactor, the phosphorus accumulating bacteria make full use of the carbon source in the raw water to release phosphorus during anaerobic stirring; the stable short-cut nitrification is achieved by adding hydroxylamine under aerobic conditions; Phosphorous bacteria use nitrite nitrogen as an electron acceptor to absorb phosphorus in water and reduce nitrite nitrogen to nitrogen gas. Compared with the traditional nitrogen and phosphorus removal process, this process saves carbon source and aeration.

The short-range nitrification / anammox integration device and method based on quick start and stable maintenance of hydroxylamine belong to the field of biological treatment of urban domestic sewage. For the short-cut nitrification / anammox integrated process, the stable operation of short-cut nitrification and the matching anammox bacteria activity are very important, but it is difficult to quickly start and stably maintain the city by only controlling the process parameters For short-range nitrification / anammox operation of sewage, this patent can achieve the effect of inhibiting the activity of nitrite oxidizing bacteria and improving the activity of anammox by adding hydroxylamine (HA), and start the integration in a short period of time The short-cut nitrification / anammox reactor maintains a good treatment effect. Compared with the traditional nitrification-denitrification denitrification process, the short-cut nitrification / anammox integrated process saves aeration, reduces sludge production, and saves carbon sources, especially suitable for low C / N urban domestic sewage.

The invention provides a system and a method for conducting deep denitrification processing on medium-term landfill leachate. A dissolved oxygen (DO) sensor and an oxidation reduction potential (ORP) sensor are respectively connected with a DO tester and an ORP tester, the DO tester, the ORP tester and an aeration mechanism are all connected with a transducer, the ORP tester, the DO tester and the transducer are all connected with a process controller through a computer, and the process controller is respectively connected with a stirring mechanism, a water inlet mechanism, a water outlet mechanism and the aeration mechanism. The steps of applying the processing method of the system are sequentially injecting waste water in a sequencing batch reactor (SBR) and starting the system, enabling the aeration mechanism and the stirring mechanism to conduct nitration, starting the stirring mechanism to conduct denitrification, sediment, dewatering and leaving unused, and enabling the computerto judge the set value of cycle times. The system and the method can solve processing problems of the medium-term landfill leachate, improve use ratio of an organic carbon source in raw water in a processing process, and achieve deep denitrification with low processing cost.