33results about How to "Compliant with circular economy" patented technology

The invention discloses a method for producing anhydrous hydrogen fluoride and silicon tetrafluoride by utilizing fluosilicic acid. The method of the invention is specifically to firstly react fluosilicic acid solution with sodium sulfate at normal temperature to obtain sodium fluosilicate and dilute sulfuric acid. Filtration, dilute sulfuric acid is concentrated to make concentrated sulfuric acid, then mixed with filter cake sodium fluorosilicate ointment, added to the pre-reactor, reacted at 50-200 ° C to generate silicon tetrafluoride gas, and the silicon tetrafluoride gas passes through the degassing tower Silicon tetrafluoride products are obtained after treatment; the remaining materials in the pre-reactor are transported to the rotary furnace, and then hydrogen fluoride gas is released in the rotary furnace at 150-350 °C, and the hydrogen fluoride gas is purified to produce anhydrous hydrogen fluoride products. The remaining slag in the rotary kiln is discharged through the furnace tail. The fluosilicic acid solution used in the present invention is derived from the by-products of phosphate fertilizer or anhydrous hydrogen fluoride, the cost of raw materials is low, a new source of fluorine is opened up, and the obtained anhydrous hydrogen fluoride and silicon tetrafluoride products have wide application fields and outstanding economic benefits , high value-added products.

The invention relates to a method for preparing ammonium sulfate and Fe3O4 from titanium dioxide production waste acid solution. The method is characterized by comprising the following steps: (1) concentrating the titanium dioxide production waste acid solution to 25-35wt%, sending the concentrated solution to a storage tank for standby; (2) sending the solution concentrated in the step (1) to an oxidation pond, introducing ammonia water, stirring with a stirrer to perform neutralization reaction; (3) introducing steam in the oxidation pond after the reaction to ensure that the temperature of the solution is increased to 90-95 DEG C, introducing compressed air at 60 DEG C while heating continuously to ensure that the oxidation reaction of Fe(OH)2 is performed continuously and Fe3O4 precipitate is obtained; and (4) sending the precipitated Fe3O4 to a filter press to perform solid-liquid separation, wherein the solid is iron black and the liquid is ammonium sulfate solution. In the method of the invention, the titanium dioxide production waste acid is used to react with ammonia water to prepare ammonium sulfate; and the technology is mature and the process is simple and is convenient to operate.

The invention relates to a wet method desulfurizing white smoke trailing treatment device and method. The treatment device comprises a booster fan, a desulfurizing tower, a reducing pipeline, a branch pipe network, a cooling water tank, a water collection tank, a draining pump, a valve, a chimney and a pipe. Flue gas is subjected to desulphurization in the desulfurizing absorbing tower through the booster fan, reducing is carried out through the pipe, then the flue gas goes into the water tank, heat radiation cooling exchange is carried out in the water tank through the branch pipe network, the temperature of the wet flue gas is lowered to about 40 DEG C from original about 55 DEG C, thus excess saturated vapor in the flue gas is condensed, the condensed water goes into the water collection tank and returns to the bottom of the desulfurizing tower for reuse, and the cooled flue gas is collected through the reducing pipe, goes into the chimney and is discharged. The excess water content in flue gas can be lowered, saturated vapor waste water is recovered, the desulfurizing tower white smoke trailing problem is solved effectively, the situation that residues in flue gas cannot pollute water resources is ensured, and secondary water treatment is avoided.

The invention relates to a coke-charging powder-discharging metering control system for a fixed bed for continuous briquette gasification, which consists of a large bunker, a pressure-reducing chute, a powder discharge chute and a feeding chute, wherein an upper feeding machine, a weighing bunker, a lower feeding machine and a weighing supporting frame are also arranged below the large bunker; the large bunker is positioned above the upper feeding machine, the pressure-reducing chute is connected below the large bunker, the upper feeding machine and the pressure-reducing chute are connected in a flexible connection mode, and the weighing bunker is arranged at a discharge outlet below the upper feeding machine; a powder screening device is arranged in a silo, and is connected with the lower feeding machine below the weighing bunker in a flexible connection mode; and the weighing bunker is supported on the weighing supporting frame. The system is provided with the powder screening device, a powder discharge device and a weighing device, and can basically prevent powder coal from entering a gas-making furnace, thereby improving the production efficiency and the yield of coal gas; on the other hand, the recollected powder coal can also be recycled, which satisfies the national industrial policy of recycling economy, energy conservation and emission reduction, and greatly improves the benefit of enterprises.

The invention provides a device and a method for manufacturing dry ice by utilizing radiant heat to produce dry ice. The device and the method are applied to lime stones with small particle size of 20-40 mm in mine production. Roasting is carried out through heat transferred through radiation by a combustion chamber in a roasting chamber, the roasted lime stones are decomposed into calcium oxide and carbon dioxide, the calcium oxide is cooled, discharged out through an ash discharging device and fed into an ash bin for storage, the carbon dioxide passes through a drying device, a pressure device, a carbon dioxide liquefying plant and a dry ice device through connected waste gas pipelines to generate dry ice, after coal gas or powdered coal in the combustion chamber is combusted, the coal gas or powdered coal is discharged out through a fan for waste heat recovery and are discharged through a chimney. Active lime with higher quality can be obtained, pure carbon dioxide can be effectively recycled and is processed and manufactured into food grade dry ice, and meanwhile waste heat can be recycled for secondary use, so that a new way with larger market prospect is developed for the production of active lime and comprehensive application of resources in our country.

The invention relates to a method for carrying out load test on a bridge support frame. The method for carrying out load test on the bridge support frame by prefabricated parts moved through tractive walking is characterized by comprising the following steps: firstly placing a template special for loading on a box-beam template on the bridge support frame; installing a plurality of rails on the template special for loading along the longitudinal direction of the bridge support frame; placing gallows frames on the rails, using a tractor to tow the gallows frames to walk to transport the prefabricated parts horizontally to lift and lower the prefabricated parts on the first layer, carrying out load test detection on the bridge support frame and then lifting and lowering the prefabricated parts on the second layer after meeting the requirement; carrying out detection again after completing loading; after test detection meets the requirement, firstly unloading the prefabricated parts on the second layer and then unloading the prefabricated parts on the first layer after all the prefabricated parts on the second layer are unloaded. The method has good reliability and safety, high test efficiency, standard test measurement and high precision of load simulation.

The invention relates to a technological method for preparation of sodium carbonate from sodium sulfate. Sodium sulfate and limestone are adopted as the main raw materials, chlorine ions and ammonia are adopted as the intermedia of the process, and the main products are sodium carbonate and gypsum. The method provided by the invention uses sodium sulfate as the main raw material to produce sodiumcarbonate, the process does not involve ammonia distillation procedure, the system does not discharge wastewater, and the consumption of steam and new water is reduced, great changes occur to the technological process and basic principles, and the raw material utilization rate reaches 98% or above. The method provided by the invention reduces energy consumption, realizes recycling of resources, does not produce wastewater, and can change the existing sodium carbonate production, and at the same time provides a new way for deepening utilization of sodium sulfate and enterprises producing sodiumsulfate waste salt.

The invention belongs to the technical field of aluminum fluoride production, concretely discloses a production system and a production method for anhydrous aluminum fluoride. The anhydrous aluminum fluoride production system comprises a hydrofluoric acid evaporator, wherein the hydrofluoric acid evaporator is connected in series to a tail gas heat exchanger, a tail gas outlet and a hydrogen fluoride gas outlet are provided with the tail gas heat exchanger, a tail gas washing apparatus is provided with the tail gas outlet, a gas mixing chamber is provided with the hydrogen fluoride gas outlet, a double-layer fluidized bed reactor is provided with a gas mixture outlet of the gas mixing chamber, the bottom of the double-layer fluidized bed reactor is provided with an aluminum fluoride product outlet, a high temperature tail gas outlet of the double-layer fluidized bed reactor is provided on the top, a reaction material inlet is provided on the double-layer fluidized bed reactor, a first order gas flow reactor is provided at the high temperature tail gas outlet of the double-layer fluidized bed reactor, the first order gas flow reactor is connected in series to a second order gas flow reactor, a third order gas flow reactor and a fourth order gas flow reactor, the second order gas flow reactor, the third order gas flow reactor and the fourth order gas flow reactor are communicated with the double-layer fluidized bed reactor, the fourth order gas flow reactor is communicated with the tail gas heat exchanger.

The invention discloses an environment protection toilet for a train, which includes a toilet, a touching switch, a flushing tank, a temporary storage tank, a storage tank and a controller, wherein, the toilet is connected with the inferior temporary storage tank via a pipeline. A switch is arranged on the joint between the temporary storage tank and the pipeline, and a storage tank is positioned under the temporary storage tank, wherein, the storage tank is connected with the temporary storage tank via the pipeline, and a switch is arranged on the joint of the temporary storage tank and the pipeline; a storage bag and an air bag are arranged inside the storage tank, one end of the air bag is connected with pressure system of the train. The storage tank is also provided with a microwave generator. The microwave generator heats and evaporates the moisture in the feces and the moisture enters a condenser via a condensing tube arranged on the storage tank to be cooled. The cooled moisture is collected in a header tank. The cooled water in the header tank is sent to the flushing tank via a pump arranged in the header tank. The bottom of the storage tank is further provided a weighing device. Therefore, the environment protection toilet has the advantages of integrating feces collection and treatment, thus reducing secondary pollution of the feces.

The invention relates to a method for carrying out load test on a bridge support frame. The method for carrying out load test on the bridge support frame by prefabricated parts moved by electrically operated gallows frames is characterized by comprising the following steps: firstly placing a template special for loading on a box-beam template on the bridge support frame; installing a plurality ofrails on the template special for loading along the longitudinal direction of the bridge support frame; placing the gallows frames on the rails, controlling the gallows frames to be electrically operated to walk to transport the prefabricated parts horizontally to lift and lower the prefabricated parts on the first layer, carrying out load test detection on the bridge support frame and then lifting and lowering the prefabricated parts on the second layer after meeting the requirement; carrying out detection again after completing all loading; after test detection meets the requirement, firstly unloading the prefabricated parts on the second layer and then unloading the prefabricated parts on the first layer after all the prefabricated parts on the second layer are unloaded. The method hasgood reliability and safety, standard test measurement and high precision of load simulation.

The invention belongs to the technical field of 4,6-dihydroxypyrimidine synthesis, and specifically relates to a method for preparing 4,6-dihydroxypyrimidine, comprising the following steps: (1) cyclization reaction; (2) cooling and dissolution; (3) ) Alcohol distillation under reduced pressure; (4) Acidification and separation; (5) Washing; (6) Adsorption; (7) Recovery of formic acid; (8) Recovery of sodium chloride; (9) Analysis. The method provided by the invention absorbs 4,6-dihydroxypyrimidine in the acidified wastewater through the adsorption resin, which not only improves the product yield, reduces the content of organic matter in the wastewater, solves the disadvantage of difficult wastewater treatment, but also improves the by-product The quality of sodium chloride reduces the content of organic matter in the by-product salt, which has good economic and social benefits.

The invention relates to a method for performing a load test for a bridge support frame. The method for performing the load test for the bridge support frame with a hand-propelled movable prefabricated part is characterized in that the method comprises the following steps of: firstly installing a load special mould on a box girder mould arranged on the bridge support frame; installing a pluralityof tracks on the load special mould along the vertical direction of the bridge support frame; installing door-shaped hangs on the tracks; pushing the door-shaped hangs with hands to realize the horizontal transportation of the prefabricated part for carrying out the hanging and release of a first layer of prefabricated part, performing load test detection for the bridge support frame, and then carrying out the hanging and release of a second layer of prefabricated part after the requirement of load test detection is reached; and carrying out the detection again after finishing loading; unloading after requirements of testing and detecting are reached, wherein the second layer of prefabricated part is unloaded firstly, and the first layer of prefabricated part is unloaded after the second layer of prefabricated part is completely unloaded. The method has good reliability and safety, and also has high accuracy for test measure standardization and load simulation.

The invention relates to a method for carrying out load test on a bridge support frame. The method for carrying out load test on the bridge support frame by prefabricated parts moved through tractive walking is characterized by comprising the following steps: firstly placing a template special for loading on a box-beam template on the bridge support frame; installing a plurality of rails on the template special for loading along the longitudinal direction of the bridge support frame; placing gallows frames on the rails, using a tractor to tow the gallows frames to walk to transport the prefabricated parts horizontally to lift and lower the prefabricated parts on the first layer, carrying out load test detection on the bridge support frame and then lifting and lowering the prefabricated parts on the second layer after meeting the requirement; carrying out detection again after completing loading; after test detection meets the requirement, firstly unloading the prefabricated parts on the second layer and then unloading the prefabricated parts on the first layer after all the prefabricated parts on the second layer are unloaded. The method has good reliability and safety, high test efficiency, standard test measurement and high precision of load simulation.

The invention relates to a modified phosphorus gypsum powder and a product thereof and belongs to the technical field of phosphorus chemical engineering or building material. The invention aims to provide a modified phosphorus gypsum powder which needs no calcination, improves quality, saves energy, increases benefit and protects environment and a product thereof. The invention comprises the following main technical point: 70 to 75 portions of phosphorus gypsum, 1 to 5 portions of a crystal transformation agent and 20 to 25 portions of an activating agent; the crystal transformation agent is one or more than two of aluminium sulfate, ferric sulfate and sodium sulfate; the activating agent is one or more than two of slag, cement, quicklime, alum slag and high bauxite; the material compositions of the crystal transformation agent are prepared to form an aqueous solution; the raw materials of the activating agent are mixed and grinded to form a powder body; the agglomerated phosphorus gypsum is shattered, is thrown into a wheel grinding and mixing machine, is subjected to roller compaction and mixing and is cured for 24 hours around; when free water is detected not more than 3 percent, the phosphorus gypsum is thrown into a pulverizer; the fineness is controlled to be 0.08 mm; and the modified phosphorus gypsum powder is obtained. The modified phosphorus gypsum powder has remarkable economic, social and environmental benefits.

The invention relates to a recyclable artificial turf. The recyclable artificial turf comprises grass fibers, bottom cloth and an adhesive layer; the bottom cloth is arranged under the grass fibers; the adhesive layer is arranged under the bottom cloth; during preparation, firstly, components of glue water in weight parts are 95-100 parts of aqueous polyolefin dispersion, 0.5-1 parts of thickeningagents, 1-5 parts of deionized water and 2-3 parts of pigment fillers; secondly, the turf is correspondingly coated for two times, coated and dried; and thirdly, the turf is perforated and cut to obtain the recyclable artificial turf. According to the recyclable artificial turf, the preparation method is simple, the steps are easy to operate, the wire drawing performances, such as breaking strength, elongation, wire drawing section and appearance, of the prepared recyclable artificial turf satisfy requirements of manufacturing the artificial turf through wire redrawing, and better water resistance is realized.

The invention relates to the technical field applied to lithium battery anode materials (lithium manganate, nickel, cobalt and lithium manganate tri-element material and manganese, iron and lithium phosphate), in particular to a preparation method of a high-purity manganese source (manganese hydroxide) applied to lithium battery anode materials. The preparation method includes: adjusting concentration of a manganese sulfate solution to 30-35 Be';adding hydrogen peroxide into the manganese sulfate solution to remove iron impurity in the solution, adding sulfurizing salt to remove heavy metal ions, and adjusting pH value to 4.5-5.0 to obtain filtered filtrate; feeding nitrogen into a reaction kettle for protection, injecting the obtained filtrate into the reaction kettle, dropping ammonia into the reaction kettle at constant speed, holding temperature for reaction after dropping of ammonia is completed, washing precipitate, and drying to obtain a finished product. By using the preparation method, the defect that an existing process utilizing high-purity manganese carbonate or high-purity metal manganese and adding acid for dissolving at home and abroad is limited by high-purity raw materials is overcome, and the product is shallow peach hexagonal crystals, is high in purity and little in impurity and meets using requirements on the lithium battery anode materials.

The invention relates to a method for cracking and recovering silicon rubber waste, which comprises the following steps: crushing the silicon rubber waste; double cracking: putting the crushed silicon rubber particles into a cracking reaction kettle, and then adding a high-temperature-resistant inert solvent and an alkali metal hydroxide , Schiff alkali metal complexes, depolymerization at a high temperature of 140-200°C under a nitrogen atmosphere to obtain crude DMC; the amount of the alkali metal hydroxide is 5%-8% of the weight of the silicone rubber waste; polymerization rearrangement ; Decolorization and deodorization to obtain refined cyclosiloxane DMC. The cracking recovery method of silicone rubber waste organically connects double cracking and polymerization rearrangement, and rationally arranges, so that less alkaline catalysts are used in recovery, waste silicone rubber recovery efficiency is higher, and waste generated is less, which meets the requirements of The advantages of a circular economy.

The invention provides a method for combined producing cellulose, lignin and composite fertilizer from cottonseed shell, which comprises the following steps: adding lignin dissolving agent and water into a container according to the proportion of 1-5:1000; adding 10-20 liquid amount of cottonseed shells; heating to 70-90 degrees centigrade and keeping for 6-10 hours; separating out crude fibers, rinsing, refining and drying to obtain the finished fiber product; sending the rinsed solution into the socking container for reuse; acidifying the solution in the first boiling pool, and press filtering to precipitate solid that is lignin; adjusting the pH value of the solution after lignin extraction to neutral, concentrating, drying, granulating to obtain composite fertilizer. Besides the cellulose, the invention can co-produce lignin and composite fertilizer, changes improves the abuses of single product, water resource waste and serious environment pollution existing in the current technologies in our country.

The invention provides a device and method used for cooling blast furnace circulating water through sintering low-temperature exhaust heat. The device comprises a sintering area and a blast furnace area. The sintering area comprises a sintering machine big flue in which low-temperature smoke is generated, the third section and the fourth section of a ring cooling machine, two sets of smoke-type lithium bromide refrigerators, a circulating water device and a water collecting box. The circulating water device and the water collecting box are commonly used. The blast furnace area comprises cooling walls, furnace bottoms, coiled pipes, tuyere hot blast valves and tuyere small sleeves of two blast furnaces. The cooling walls, the furnace bottoms, the coiled pipes, the tuyere hot blast valves and the tuyere small sleeves of the two blast furnaces need to be cooled through circulating water and are connected with heat exchangers and pipelines of the cooling walls, the furnace bottoms, the coiled pipes, the tuyere hot blast valves and the tuyere small sleeves of the two blast furnaces respectively, and the heat exchangers are connected with the water collecting box through water pumps. According to the device and method used for cooling the blast furnace circulating water through the sintering low-temperature exhaust heat, the low-temperature waste gas exhaust heat discharged by sintering is used fully, cooling of blast furnace equipment is achieved, and the energy saving effect is good; in addition, operation and maintenance are easy, intensified smelting of the blast furnaces is facilitated, and the yield is improved.

The treatment method for copper-containing acid sewage comprises: treating the sewage with barium sulphide or sodium sulfide to prepare a plurality of chemical products, such as barium sulfate, and can recycle acid liquid with H+ content more than 16% as iron rust remover. This invention has no pollution and well social and economic benefits.