63results about How to "Meet concentration requirements" patented technology

The invention relates to a method for preparing sulphoaluminate cement by calcining ardealite by steps. Limestone and natural gypsum are completely replaced by ardealite, the ardealite is homogenized with bauxite, solid steel scrap and anthracite duff and then a method for calcining by steps is adopted for preparing the sulphoaluminate cement. According to the invention, the use ratio of the ardealite can be greatly increased and the high-concentration sulfur dioxide tail gas can be absorbed for preparing sulfuric acid. The sulphoaluminate cement prepared according to the invention is high in clinker hardening speed, high in early strength and stable in later strength. A performance test proves that the mechanical strength of the sulphoaluminate cement prepared according to the method provided by the invention meets the sulphoaluminate cement standard.

The invention relates to a phosphogypsum sulphoaluminate cement sulfuric acid coproduction method; wherein, phosphogypsum replacing completely limestone and natural gypsum, after being ground and homogenized with bauxite and anthracite culm, at 1250-1300 DEG C, calcinating and resulting in the sulphoaluminate cement. The exploitation rate of phosphogypsum in the method is increased to a large extent; high concentration of sulfur dioxide tail gas through absorption is prepared into sulfuric acid. The hardening speed of sulphoaluminate cement clinker is quick, the intensity of sulphoaluminate cement is high during the former and later phase, performance test shows that the mechanical strength of the sulphoaluminate cement prepared by the method accords with the standard of sulphoaluminate cement.

The invention discloses a method for preparing potassium chloride by utilizing potassium mixed salt. The method comprises the steps that a reverse flotation process is adopted to remove sodium chloride in the potassium mixed salt, and a tailing is obtained; the tailing is dissolved in water, and solid-liquid separation is performed to obtain a tailing solution; a section of nanofiltration step is executed, wherein a nanofiltration membrane system is adopted to conduct a section of nanofiltration treatment on the tailing solution to obtain a section of concentrated water and a section of produced water and comprises a first nanofiltration membrane module and a first concentrated water tank and a first produced water tank connected to the first nanofiltration membrane module, the section of concentrated water is stored in the first concentrated water tank, and the section of produced water is stored in the first produced water tank; evaporative crystallization is conducted on the section of produced water to obtain the potassium chloride. The invention provides a novel method for producing potassium chloride by using potassium mixed salt as a raw material. The method has the advantages of being simple in process, high in product purity and high in yield.

The invention discloses a method for preparing potassium chloride and magnesium sulfate from kainite. The method comprises the following steps: dissolving the kainite in water to obtain a kainite solution, and performing primary nanofiltration: performing primary nanofiltration treatment on the kainite solution by adopting a nanofiltration membrane system to obtain primary concentrated water and primary producing water, wherein the nanofiltration membrane system comprises a first nanofiltration membrane assembly and a first concentrated water tank and a first producing water tank which are connected to the first nanofiltration membrane assembly, the primary concentrated water is stored in the first primary concentrated water tank, and the primary producing water is stored in the first producing water tank; performing evaporative crystallization on the primary producing water to obtain potassium chloride; performing evaporative crystallization on the primary concentrated water to obtain magnesium sulfate, or performing secondary nanofiltration to obtain secondary concentrated water, and performing evaporative crystallization on the secondary concentrated water to obtain the magnesium sulfate. The invention provides a novel method for producing the potassium chloride and the magnesium sulfate from the kainite serving as a raw material; and furthermore, the method has the advantages of simple process, high product purity and high yield.

Provided is an ammonia-nitrogen removing method for treating high-concentration ammonia-nitrogen waste water. The method comprises the steps that two phases are adopted to conduct treatment on the ammonia-nitrogen waste water; for the first phase, namely, a physico-chemical pretreatment phase, the concentration of the high-concentration ammonia-nitrogen waste water is reduced through an ultrasonic stripping method, wherein the water temperature is 65+ / -6 DEG C, and the time is 120+ / -20 min; the concentration requirement of a biological denitrification method to the ammonia-nitrogen waste water is met; for the second phase, residual ammonia and nitrogen in the waste water are removed through a denitrification and nitration biological denitrification method. Due to the fact that ultrasound has the advantages of increasing and controlling the chemical reaction velocity, increasing the yield of reactants and the like, for the ultrasonic stripping method, on the basis of a traditional air stripping method, an ultrasonic degradation technology is combined with a stripping technology, and a novel efficient high-concentration ammonia-nitrogen waste water treatment technology is derived. The ammonia-nitrogen removing rate can reach 90 percent, and limitation of the ammonia-nitrogen waste water concentration in a traditional technology is made up.

The invention discloses a method for preparing potassium chloride by utilizing potassium mixed salt. The method comprises the steps that a reverse flotation process is adopted to remove sodium chloride in the potassium mixed salt, and a tailing is obtained; the tailing is dissolved in water, and solid-liquid separation is performed to obtain a tailing solution; a section of nanofiltration step is executed, wherein a nanofiltration membrane system is adopted to conduct a section of nanofiltration treatment on the tailing solution to obtain a section of concentrated water and a section of produced water and comprises a first nanofiltration membrane module and a first concentrated water tank and a first produced water tank connected to the first nanofiltration membrane module, the section of concentrated water is stored in the first concentrated water tank, and the section of produced water is stored in the first produced water tank; evaporative crystallization is conducted on the section of produced water to obtain the potassium chloride. The invention provides a novel method for producing potassium chloride by using potassium mixed salt as a raw material. The method has the advantages of being simple in process, high in product purity and high in yield.

The invention relates to a power improved diaphragm type carburetor. The power improved diaphragm type carburetor comprises a carburetor body, and the upper part of the carburetor body is internally provided with an air inlet passage penetrating the carburetor body; the air inlet passage is internally provided with a choke valve device which can rotate to adjust the air inlet amount, a throat pipe used for accelerating the air flowing speed and a throttle valve device which can rotate to adjust the mixed air amount in the direction of air inlet in sequence; the lower side surface of the carburetor body is provided with a fuel injection cavity for storing fuel, and the carburetor body is internally provided with a fuel injection channel which facilitates fuel in the fuel injection cavity to be injected into the air inlet passage; and the lower part of the carburetor body is provided with a negative pressure regulating device used for controlling the oil tank to feedthe fuel into the oil injection cavity, and the negative pressure regulating device is arranged below the fuel injection cavity. The power improved diaphragm type carburetor adopts the horizontally-arranged negative pressure regulating device, so that a negative pressure elastic membrane is uniformly covered by fuel, severe local damaging caused by different oil corrosion degree of the negative pressure elastic membrane is prevented, and the fact that the problem of poor oil supply quality of the carburetor is generated due to changing of the physical property when the negative pressure elastic membrane is deformed is avoided.

The invention relates to a method for preparing high-strength sulphoaluminate cement and co-producing sulfuric acid. The method comprises the following steps of adopting phosphogypsum for completely replacing limestone and natural gypsum, milling and homogenizing the phosphogypsum, bauxite, steel scoria, silica and pulverized anthracite, and then calcinating the milled and homogenized raw materials at a temperature of 1250-1300 DEG C. The method is capable of greatly improving the phosphogypsum utilization ratio, and high-concentration sulfur dioxide tail gas can be adsorbed to prepare sulfuric acid. The prepared sulphoaluminate cement clinker is high in hardening rate, high in early-stage strength, and stable in later-stage strength increase; performance tests indicate that the mechanical strength of the sulphoaluminate cement prepared by the method conforms to the rapid-hardening sulphoaluminate cement standard.

The invention relates to a method for producing and synthetizing ammonia and methyl alcohol raw material gas by virtue of fixed bed intermittence type oxygenation nature gas, and the method is characterized by improving the concentration of oxygen in charged air of the traditional fixed bed intermittence gasification process to 22-65%. By utilizing the method, the defects of low blowing efficiency, low single-furnace output, high coal consumption, serious environment pollution, unstable oxygen enrichment continuous gasification operation, high gas carbon dioxide and methane and the like of the traditional intermittence gasification process are overcome, and the advantages of high enrichment continuous gasification gas production rate and low coal consumption are carried on, two gasification process advantages are innovatively integrated, and the purpose of playing up strengths and avoiding weaknesses is realized.