67results about How to "Reduce production load" patented technology

The invention discloses a coking coal pretreatment method and a special device thereof. The coking coal pretreatment method comprises the following steps: transferring blending coal for coking into a humidifying and classifying bed through a feeding device; blowing the blending coal for coking into a fluidization state with waste and heat gas; regulating and controlling moisture; fractionating the blending coal by grain sizes; reducing the moisture content of the bending coal to 6-8 percent with heat gas in the humidifying and classifying bed; dividing the coal into two grain size levels, wherein one grain size level is less than or equal to 3mm, and the other grain size level is greater than 3mm; discharging fine grain coal with a grain size which is less than or equal to 3mm from the humidifying and classifying bed, and transporting the fine grain coal to a pulverizer chamber for pulverization; and transporting the pulverized fine grain coal into a coal tower. The special device comprises the humidifying and classifying bed, a coke oven chimney, the pulverizer, the coal tower and a tail gas treating device. The coking coal pretreatment method can increase the output of a coke oven, improves the quality of the coking coal, reduces the energy consumption of the coke oven and the exhaust of waste gas and waste liquid, is applied to a coal pretreatment technology in a coking industry and can realize the purposes of energy saving, emission reduction and circular economy development.

A preparation method of a high-efficiency porous iron oxide desulfurizing agent is provided. The method comprises the steps: with Fe(NO3)3.9H2O and an alkali as main reactants and under the action of a surface active agent or polyalcohol as a structure-directing agent, a solid state reaction method is adopted to prepare the porous iron oxide desulfurizing agent for purification of hydrogen sulfide and other typical stench waste gases. The specific surface and the pore structure of the desulfurizing agent can be controlled by the type and the adding amount of the structure-directing agent, the adding amount of the alkali and other factors. The obtained desulfurizing agent shows higher desulfurization performance in a system with a high airspeed and with or without the presence of water vapor, wherein the one-time sulfur capacity can be as high as 26.6% in the presence of the water vapor and is far higher than the sulfur capacity of a current industrial iron oxide desulfurizing agent. At the same time, the solid state reaction method not only has simple process, but also is more environmentally friendly, and greatly reduces the sewage discharge amount and the production load of a subsequent sewage treatment device.

A process for separating crystal slurry in the production of sodium carbonate includes such steps as synthesizing sodium bicarbonate crystal in carbonizing tower, discharging the crystal slurry, hydraulic cyclone separating, alkali filtering to obtain solid and calcining. Its advantage is low load of alkali filter to increase its productivity by 20%.

The invention discloses a new method for recycling ammonia synthesis cold energy in a synthetic ammonia system. The method comprises the following steps that gas ammonia delivered by an ice maker is condensed into liquid ammonia via a condenser; the liquid ammonia enters an ammonia storage tank condenser to exchange heat with liquid ammonia discharged from the synthetic ammonia system; the liquid ammonia subjected to heat exchange enters a liquid ammonia storage tank for supplying ammonia to a synthetic ammonia cooler; the liquid ammonia discharged from the synthetic ammonia system is for downstream user use after being reheated. The method disclosed by the invention has the advantages that the problems that the ammonia storage tank in the refrigerating process of a synthetic ammonia device in summer production is overpressured and the environment is polluted by the gas ammonia discharged into the atmosphere are solved; the steam consumption of a steam turbine for driving the ice maker is reduced; the production is stabilized; the benefit is increased.

Belonging to the field of chemical engineering, the invention relates to a method for reducing the acid content of a dimethyldichlorosilane hydrolysate. The method includes the steps of: (a) subjecting the dimethyldichlorosilane hydrolysate and a calcium chloride aqueous solution to countercurrent mixing and washing; (b) then continuously contacting the hydrolysate with a hydrochloric acid mass fraction gradually reduced aqueous phase, and performing full washing. On the basis of washing, the method provided by the invention introduces calcium chloride to increase the proportion of the hydrolysate and water, realizes rapid layering of the two, avoids emulsification phenomenon during washing, and improves the washing and acid removing effects. In addition, the method provided by the invention significantly reduces the consumption of washing water and lowers the production load, and the calcium chloride can be recycled, thus achieving green and clean production.

The invention discloses an integral front door lock body assembly. The integral front door lock body assembly comprises a lock body sub assembly, a lock shell sub assembly and an automatic open connecting sub assembly; the lock body sub assembly includes a lock body and a cover plate; the lock shell sub assembly includes a copper piece mounting plate, a copper piece and a shell cover; and the automatic open connecting sub assembly includes an electric door opening torsion spring shell, a gear A and an electric door opening motor. The integral front door lock body assembly adds a vehicle door electric opening function, an inner open double-pull function, a terrified lock function, a super lock function, a super lock mechanical wrong lock preventing function, an outer lock instant signal, a door lock half-open signal, a door lock full-open signal and a lock state signal, is compact in structure, prevents both dust and water, is high in transmission efficiency, and is higher in popularization and application values.

The invention discloses a catalytic cracking method for preparing N-(3-dimethylaminopropyl) methacrylamide, which comprises the steps that: an intermediate raw material of N-dimethylin-Beta-dipropylamino acrylamide and a catalyst of calcium nitrate are mixed and put into a reaction kettle, with the mixture ratio of the raw material to the catalyst to be 25:1 to 50:1; with the mixture ratio of the raw material to the catalyst to be 1000:0.5 to 1000:1, materials of certain quantity are sent to a high-post dripping tank by a storage-tank pump and dripped into a catalytic cracking reaction vessel at a stable speed when the pressure is reduced to the vacuum degree of 10mmHg and the temperature is raised to 220 DEG C, so that the concentration of the catalyst in the reaction vessel is kept basically stable in the reaction course; a hot water circulating pump is started to keep the returning temperature of the circulating hot water equal to or lower than 105 DEG C; a heat conducting oil heating system is started so that the temperature of the material in the reaction vessel increases to 220 DEG C; gaseous reacting materials are sent from the reaction vessel to a partial condenser; the cooled materials are sent out from the top of the partial condenser and enter into next process. With the same equipment parameters, the catalytic cracking method of the invention improves the production capacity of equipment and product yield rate and reduces energy consumption.

The invention discloses a polymerization solvent system recovery process in aramid fiber 1414 production, and belongs to the technical field of high-molecular polymer production. In the technical scheme, through the work procedures of twice neutralization, twice pulping, extraction, steam stripping, refining and the like, para-aramid polymers are washed and purified; in addition, auxiliary agentsof calcium chloride and solvents of N-methyl pyrrolidone used in the production are recovered and are repeatedly utilized; the cyclic economy is formed; meanwhile, the chloride ion content in the discharged sewage is effectively reduced; the environment-friendly requirements are better met; and the environment-friendly and economic effects are achieved.

The invention discloses a new deep purification process of organic waste gas, and applications of the new deep purification process in treatment of industrial organic waste gas. According to the present invention, through the integrated innovation of an efficient liquid absorption method and a solid adsorption method, the efficient synergistic purification of particulate matters, VOCs and multiple pollutants is achieved; the concrete principle is that most of the VOCs in waste gas are subjected to absorption removal by using an efficient liquid absorbent through a like dissolves like principle and other principles while the vast majority of particulate matters are removed through washing, most of water is removed from the purified waste gas through a demister, the water removed waste gas enters an adsorption section, and the VOCs in the waste gas is subjected to adsorption removal so as to achieve the standard discharging; and with the previous section absorption process, the bonding and the clogging of the subsequent section adsorption equipment can be prevented, the production load can be reduced, the long-time efficient and stable running can be ensured, and the double efficient synergistic control of the multiple pollutants in the method and between the methods can be achieved; and the new deep purification process has advantages of high VOCs removal efficiency and flexible process selection, and is suitable for the treatment of industrial organic waste gas.

The invention discloses a recovery and treatment method for alkali residues produced in soda ash production. The recovery and treatment method comprises the following steps: (1) subjecting alkali residues to separation and dehydration, then subjecting the alkali residues and hot mother liquor to an ammonia distilling reaction in an ammonia distilling tower, controlling the pH value of liquid in the ammonia distilling tower to be 9.0 or below, and maintaining excess ammonium chloride in the mother liquor; (2) conveying semi-ammonium mother liquor obtained after ammonia distillation of the mother liquor in the step (1) to another ammonia distilling tower, and adding lime milk for ammonia distillation, wherein 0.13-0.19 m<3> of the lime milk is added into each cubic meter of the semi-ammoniummother liquor, and ammonia distillation is continued until the ammonia index of waste liquid in the tower is less than 50 mg/l; and (3) subjecting the waste liquid of secondary ammonia distillation to solid-liquid separation, dehydrating the alkali residues and conveying ammonia gas distilled from the tops of the ammonia distilling towers in two ammonia distillation operations to an ammonia absorption tower for recovery. According to the treatment method for the alkali residues in the invention, after the alkali residues are subjected to the secondary ammonia distillation reaction, about 80-85% of the solid has been involved in the chemical reaction; and after dehydration, the amount of the solid (wet basis) is reduced to less than 12.3% of the amount of the solid before ammonia distillation.

The invention discloses a pretreatment process of livestock and poultry breeding wastewater. The pretreatment process comprises the following steps: 1) solid-liquid separation: carrying out solid-liquid separation on the livestock and poultry breeding wastewater to remove large-particle suspended matters; 2) magnetic coagulation sedimentation: treating the wastewater having undergone solid-liquidseparation to obtain magnetic powder-containing sludge and magnetically coagulated liquid; 3) pH value adjustment: adjusting the pH value of the magnetically coagulated liquid to 10.5-12; 4) gaseous membrane deamination: allowing ammonia nitrogen in the magnetically coagulated liquid to pass through a gaseous membrane in a gaseous form so as to allow the ammonia nitrogen to be absorbed by an ammonia absorption liquid; and 5) separation and reuse of magnetic powder: carrying out magnetic separation on the magnetic powder-containing sludge to obtain the magnetic powder and sludge. According to the invention, pollutants such as CODs, suspended solids, ammonia nitrogen, TP and the like in the wastewater can be synchronously removed, so subsequent biochemical treatment is facilitated; accordingto the pretreatment process, added chemicals are low in cost and toxicity and basically free of secondary pollution, a high-concentration ammonium salt solution is generated, resourceful treatment ofthe livestock and poultry breeding wastewater is achieved, the magnetic powder can be recycled after magnetic separation, and a sludge amount is reduced.

The invention provides a dry coke quenching residual heat energy recycling and coking wastewater treatment combined technology. Ammonia evaporation wastewater is upward sprayed out from the bottom ofa cooling section of a dry coke quenching furnace (1) to absorb sensible heat of red coke; the ammonia evaporation wastewater is in direct contact with the red coke and is gasified to generate steam;the steam and the red coke are subjected to heat absorption chemical reaction to generate water gas; meanwhile, organic matter pyrolysis gas in the ammonia evaporation wastewater, the water gas and the steam form mixed gas; the mixed gas is exhausted from an annular channel in the middle of the dry coke quenching furnace; after the mixed gas is subjected to dust removal, the mixed gas is conveyedinto a dry coke quenching residual heat boiler (3); and the mixed gas sequentially passes through a steam overheating section, upper and lower sections of a tower-bottom circulating oil heater of a benzene removal tower, an evaporation section of the dry coke quenching residual heat boiler and a tower-bottom circulating ammonia water heating section of an ammonia evaporation tower from top to bottom and is subjected to gradient heat exchange, and the mixed gas is output from the bottom of the dry coke quenching residual heat boiler. According to the technology provided by the invention, dry coke quenching residual heat energy is used for replacing negative-pressure evaporated ammonia and a negative-pressure benzene removal heat source; the coking wastewater also can be treated to obtain the water gas; and the technology can be used for effectively recycling and utilizing the dry coke quenching residual heat energy, and energy saving and environment protection are realized.

The invention relates to a hardness reduction treatment method for lead-zinc smelting industrial wastewater subjected to up-to-standard treatment, and belongs to the technical field of lead-zinc smelting industrial wastewater treatment and zero discharge. The treatment method comprises the specific steps: storing liquid carbon dioxide in a storage tank, converting the liquid carbon dioxide into gaseous carbon dioxide through an air temperature vaporizer, and conveying the gaseous carbon dioxide to a dissolved gas reactor; pumping the high-hardness reclaimed water subjected to up-to-standard treatment into the dissolved gas reactor, and carrying out a reaction with the gaseous carbon dioxide; adding a sodium hydroxide solution into the reacted liquid, and enabling the liquid to sequentiallyenter a 1# reaction tank, a 2# reaction tank, a 3# reaction tank and a 4# reaction tank for reaction; enabling the liquid after the reaction is finished to enter an inclined plate sedimentation tankfor solid-liquid separation, and filtering slag water by a filter. According to the method, a carbon dioxide and sodium hydroxide hardness reduction process is utilized, so that the hardness of raw water is continuously, stably and efficiently reduced, the salt content of the raw water is not greatly increased, the production load of subsequent high-power concentration and evaporation salting-outis reduced, and the initial investment and the operation cost of zero-emission treatment of the reclaimed water reaching the standard are effectively reduced.

The invention relates to the field of carbon neutralization energy conservation and emission reduction, and particularly discloses an ammonia-alcohol co-production method for realizing low-carbon emission through combination of photocatalysis and coal gas. A process device for implementing the method comprises a photocatalytic hydrogen production device, an air separation device, a coal gasification device, a purification device, a methanol synthesis device, an ammonia synthesis device and a urea device. According to the invention, through comprehensive utilization of photocatalytic hydrogen production, green production of hydrogen is realized. The method is coupled with the traditional coal chemical industry production process, and a conversion device is canceled, so that a large amount of carbon emission caused by hydrogen production is avoided, the utilization rate of carbon elements in coal is improved, and low-carbon production of the coal chemical industry is realized.

The invention discloses a preparation method for Huangjinya osmanthus-scented Congou black tea, and relates to the technical field of black tea preparation. The preparation method comprises the following steps of S1, collection of fresh leaves, wherein pekoe fresh leaves are selected as raw materials, and the picking standard includes selection of single buds, early development of a bud and a leaf, completeness and tidiness of the buds and leaves, exclusion of no fish leaf or damaged leaf and the like; and S2, withering, the picked fresh leaves of the same level are conveyed to a factory, andspread and withered in time. According to the preparation method for the Huangjinya osmanthus-scented Congou black tea, the osmanthus-scented Congou black tea can be subjected to standard, precise andsanitary treatment, and standardized and industrialized production of products can be ensured; the products can be produced on a large scale in a centralized mode, and it is ensured that the productsare stable in quality and consistent in flavor; according to the preparation method, by adopting a cryogenic freezing-drying technology, the flavor of spring bud tea is ensured, and the fragrance ofosmanthus is further ensured effectively; and the high-quality spring tea and the osmanthus tragrans with best flavor are combined, and the product quality of the osmanthus-scented black tea is improved greatly.