40 results about "Oxidative pyrolysis" patented technology

The invention discloses a high-cis-1,4-content hydroxyl-terminated polybutadiene liquid rubber and a preparation method thereof. The method includes following steps: (1) preparing epoxidized butadiene rubber from butadiene rubber; (2) preparing high-cis-1,4-content aldehyde group-terminated polybutadiene liquid rubber from the epoxidized butadiene rubber; (3) preparing high-cis-1,4-content aldehyde group-terminated polybutadiene liquid rubber from the butadiene rubber in a one-pot manner; (4) reducing the high-cis-1,4-content aldehyde group-terminated polybutadiene liquid rubber to prepare the high-cis-1,4-content hydroxyl-terminated polybutadiene liquid rubber. In the method, the high-cis-1,4-content hydroxyl-terminated polybutadiene liquid rubber is prepared from the butadiene rubber and the content of cis-1,4 can reach 95.0-99.0%. A number-average molecular weight of the high-cis-1,4-content hydroxyl-terminated polybutadiene liquid rubber can be regulated between 2000 g/mol and 10000 g/mol. A molecular weight distribution is 1.2-3.0 and a degree of functionality is 1.9-2.2. On the basis of excessive supply in raw rubber of butadiene rubber and increased tensing situation of petroleum sources, by means of the method, the high-cis-1,4-content hydroxyl-terminated polybutadiene liquid rubber can be prepared through oxidative pyrolysis of the butadiene rubber, so that the method has a quite important practical significance.

The invention belongs to the technical fields of wet metallurgy and chemical industry production and discloses a method for treating a waste secondary battery. The method comprises the following steps: performing two-stage combustion in a rotary kiln, maintaining the furnace temperature to be at 100-150 DEG C, roasting the waste secondary battery on the furnace front, and remaining for 30-60 minutes to ensure that a sealing ring in the waste secondary battery is fully pyrolyzed and damaged, so that hydrogen and an organic solvent in the battery are released; and burning the materials in a hearth on the rear of a combustion chamber of the furnace body, maintaining the temperature to be at 300-500 DEG C, fully oxidizing, pyrolyzing and burning organic matters in the wastes, and effectively controlling generation of ozone and nitrogen oxides, so that the produced gas achieves the odor-free, stink-free and completely-combusted effects. The treatment method provided according to the invention is reasonable in design, the operations of burning and breaking are sequentially performed, the breakage rate is high, the recycling rate of valuable elements is high, a high-temperature burning explosion accident can be avoided, and the method is safe, pollution-free and suitable for popularization.

The invention discloses an oxidative pyrolysis process of dinitrotoluene wastewater. The oxidative pyrolysis process comprises the following steps of: passing wastewater from a washing kettle through a buffer tank, a settling tank, a preheater, a high pressure pump, a pyrolytic preliminary heat exchanger, a pyrolytic hot oil heat exchanger, a pyrolysis reactor, a pyrolysis cooler and a buffer tank to be discharged, wherein an oxidant is added at an inlet of the settling tank and/or the pyrolytic preliminary heat exchanger; and the oxidant is added into the pyrolytic preliminary heat exchanger through pressurization. According to the process, the chromaticity of the wastewater processed by the oxidative pyrolysis process is reduced by 25-30 percent in comparison with the conventional process, the scaling in the heat exchanger of the system can be effectively reduced, the operation cost can be reduced, and the content of aromatic nitro compounds (dinitrotoluene, nitrocresol and the like) in the wastewater after treatment is reduced by 25-30 percent compared with that in the conventional process.

The invention discloses a preparation method of aCo3O4NP/CD/Co-MOF composite material and application of electrocatalysis based on the composite material, and belongs to the technical fields of nanocatalysis, nanomaterials and the like. The preparation method mainly comprises the following steps: reacting cobalt nitrate, glucose, triethylene diamine and terephthalic acid at room temperature to obtain Co-MOF/glucose flaky microcrystals; performing oxidation and pyrolysis on the microcrystals under microwave irradiation to obtain a Co-MOF composite material with semiconductor Co3O4 nanoparticlesand carbon dot CD which are co-doped, namely, the Co3O4 NP/CD/Co-MOF composite material. The composite material has the advantages of low raw material cost for preparation, simple preparation process, low reaction energy consumption and industrial application prospect. The catalyst has high electrochemical activity for the electrocatalytic nitrogen fixation to form ammonia.

The invention provides a method for injecting high-pressure air into a low-permeability reservoir to perform oxidative pyrolysis and displacement of oil. Before air displacement for oil extraction is performed, high-temperature hot water is firstly injected to form a first slug, then three-phase nitrogen foam is injected to form a second slug, an injected air and the three-phase nitrogen foam mixed-phase substance serves as a third slug, then high-pressure air is injected to perform air displacement for oil extraction, and high-pressure air injection is conducted on stratum under the pressure of 25-50 MPa. The method can effectively conduct viscosity reduction and cooling on formation oil at the initial stage of the air displacement, a round oxidative pyrolysis zone is rapidly formed in the oil layer, the liquidity of the crude oil in an oil reservoir is improved, the low-permeability reservoir originally difficult to develop is improved, and the recovery rate is improved in a long-acting mode. The method is suitable for the low-permeability reservoir, the optimum condition is the reservoir depth of 1300-4900 meters, the reservoir thickness is more than 2.5 meters, the reservoir temperature is greater than 55 degrees, the oil saturation is above 30%, the permeability is greater than 1 millidarcy, and the connectivity is above 80%.

The invention discloses a plasma-assisted experimental platform for oxidation, pyrolysis and reforming of gas-liquid fuel. The platform comprises a gas inlet system, a reaction system, a power supply system, an exhaust system and a product detection system. The gas inlet system is provided with a liquid fuel pump and an evaporation tank which are used for liquid fuel sample injection and evaporation; the reaction system comprises a quartz flow tube with a double-layer dielectric barrier discharge structure and an electric heating furnace, and uniform, high-energy and high-density non-equilibrium plasma can be obtained at different temperatures; the power supply system can meet the requirements of various discharge forms; and a piston type negative pressure gas collecting device contained in the product detection system can meet the requirement for experiments in a negative pressure environment. The invention provides an experimental platform and method for plasma-assisted oxidation, pyrolysis and reforming in a wide pressure and temperature range and in various power supply forms, and is beneficial to the research of gas-liquid fuel about plasma-combustion chemical reaction kinetics and the development of related mechanisms.

The invention relates to the technical field of environmental protection, in particular to a cyclic regeneration process system for governing VOCs exhaust gas. The system is characterized by comprising a desorption pyrolyzing furnace, a chain transmission grate bed, an induced draught system and an adsorbent moving bed. The desorption pyrolyzing furnace comprises a desorption pyrolyzing furnace body and a material supply system. The desorption pyrolyzing furnace body is provided with a flame path and a vertical path, high-temperature glue gas circulates in the flame path, an adsorbent moves tofall off in the vertical path, and the flame path and the vertical path are built adjacently. The material supply system comprises a storage tank and an air injection container. The air injection container introduces tail gas discharged by the flame path into a purging adsorbent, is then mixed with desorbed VOCs exhaust gas and is then conveyed to a pyrolyzing room to be oxidized and pyrolyzed through a grate brick in the bottom of a desorption room. The chain transmission grate bed comprises material legs and a chain transmission grate bed body. A kiln box and a chain transmission grate bedrow are designed on the chain transmission grate bed, an exhaust port is formed in the kiln box, the chain transmission grate bed row comprises a chain wheel, a chain, a grate row and an air distributing plate, and the induced draught system is responsible for introducing and conveying tail gas of an exhaust barrel of the adsorbent moving bed into the air distributing plate of the chain transmission grate bed.

The invention discloses an intelligent energy-saving and emission-reducing system of a drying furnace. The intelligent energy-saving and emission-reducing system comprises a main controller, a flash drying chamber, a constant temperature chamber, a first fresh air machine, a concentration runner device and a pyrolyzing furnace, wherein the flash drying chamber and the constant temperature chamber are fixedly arranged side by side, and the main controller is fixedly arranged on the outer wall of the left side of the flash drying chamber; paint on the surface of a device can be subjected to flash drying through the flash drying chamber, so that a curing film layer is formed on the surface of the paint, and the phenomenon of leveling is avoided; the paint between the surface of the device and the curing film layer can be evaporated to be dry at a constant speed through the constant temperature chamber at a constant temperature, so that the drying speed is increased, and meanwhile, the problems of paint brick cracking and air holes caused by too fast drying are avoided; air containing organic solvent gas is concentrated through the concentration runner device and then is guided into the pyrolyzing furnace, so that the organic solvent gas is subjected to oxidation pyrolysis, and the pollution is reduced; and through a heat conduction pipe and a cold return pipe, heat generated when the pyrolyzing furnace is used for carrying out oxidation pyrolysis on the organic solvent gas is recycled, so that the energy consumption is reduced.

The invention discloses high-temperature oxidation pyrolysis and thermal desorption integrated aged oil sludge treatment apparatus and process technology. The high-temperature oxidation pyrolysis and thermal desorption integrated aged oil sludge treatment apparatus comprises an indirect heating drying kiln, and a raw material conveying device A is mounted at the feeding end of the indirect heating drying kiln; a raw material conveying device B is connected between the discharging end of the indirect heating drying kiln and a feeding opening of an oxygen-controlled thermal desorption unit in a communicated mode; a raw material conveying device C is installed at a discharging opening of the oxygen-controlled thermal desorption unit; an oxygen-controlled hot air generator is arranged at a combustion opening of the oxygen-controlled thermal desorption unit; oily sludge is directly heated through oxygen-controlled high-temperature flue gas; the oily sludge is subjected to high-temperature oxidation at the tail end of the oxygen-controlled thermal desorption unit, so that oil is thoroughly removed, heat energy is released, and the heat efficiency is improved on the basis of direct heat exchange; a flue gas electric heating system is arranged for flue gas discharged from the oxygen-controlled thermal desorption unit, so that the flue gas is prevented from condensing and blocking equipment; and oil products are recycled after the oil-containing and dust-containing flue gas subjected to thermal desorption is purified, and the recycled oil is high in quality and can be recycled.

The invention relates to a pyrolysis harmless treatment method for thiocyanation-containing leaching tailings, which comprises the following steps: adding a thiocyanation-containing leaching tailings filter cake obtained by filter pressing into a rotary kiln, heating, oxidizing and decomposing the thiocyanation-containing leaching tailings by utilizing the characteristic that a cyanogen-containing compound is easy to decompose at a high temperature, and driving materials in the rotary kiln to turn over when the rotary kiln rotates, and the self-crushing effect is achieved, and the oxidation reaction speed of cyanide is increased. By controlling the highest pyrolysis temperature and adjusting the pyrolysis atmosphere in the kiln, the concentration of oxygen and CO is controlled within a proper range, oxidation of sulfides in the tailings can be avoided, the content of SO2 in pyrolysis flue gas reaches the emission standard, the content of toxic leaching total cyanide in the treated tailings reaches the related standard of class I general solid waste, and the method is suitable for industrial production. And clean and efficient harmless treatment of the thiocyanation tailings is realized.

The invention relates to a light flame-retardant phenolic foam material and a preparation method thereof and belongs to the technical field of heat-preservation materials. According to the preparationmethod, double bonds in linseed oil molecules are enabled to join in reactions to be a part of a polymer structure, so that a modified phenolic resin solid is of an interpenetrating polymer network structure, the thermal resistance and the thermal stability of a phenolic resin are effectively improved, titanium diboride is coated by the phenolic resin, the titanium diboride is subjected to oxidation-reduction reactions with an oxygen-containing gas at a high temperature, elements of C and O in a pyrolysis gas are absorbed and converted into solid products such as irregular titanium and TiO2,and relatively intense oxidative pyrolysis of a resin substrate is inhibited; in addition, the resin substrate is embedded into a framework of phenolic foams, the density of the framework is improved,the integrity of a phenolic foam high-temperature pyrolysis product is improved, the residual weight and the strength of a composite material after high-temperature pyrolysis are increased, and the flame retardancy and the fireproof properties of the composite materials are remarkably improved.

The invention relates to the technical field of the environment protection, and specifically relates to a VOCs waste gas adsorbent desorption pyrolyzing furnace running method. The method is characterized by comprising the following steps: a material feeding system is started to feed material for a sprue, wherein the adsorbent continuously moves in the sprue from top to bottom under the gravity effect, an air injection and collection tank recycles the tail gas discharged by a flame path to blow the adsorbent in the sprue, and then the adsorbent is mixed with the desorbed VOCx waste gas to be transferred to a pyrolyzing chamber to perform pyrolysis through a grate brick at the bottom of a desorption chamber; the high-temperature flue gas is sent to the pyrolyzing chamber through a flue collection path to mix with the desorbed VOCs waste gas; the excessive oxygen in the high-temperature flue gas oxidizes and pyrolyzes the mixed gas, the tail gas flows into the smoke exhaust and collection tank, and is then discharged to a chimney after performing waste heat recovery.