46results about How to "Eliminate coking" patented technology

The invention relates to an in-situ regeneration method of a butylene oxy-dehydrogenation catalyst, which mainly solves the problems that the in-situ regeneration effect of the butylene oxy-dehydrogenation catalyst is poor, so that the life of the catalyst is shortened, the conversion rate and yield of reaction are reduced, and the change of the catalyst results in long stopping time of a device and influences the output of the device in the prior art. The method comprises the following steps of: a) stopping feeding of oxygen-containing gas and then a butylene raw material, purging the catalyst with 300-500 DEG C superheated water vapor for 0.2-56h, b) gradually reducing the amount of the water vapor till the airspeed of the water vapor is 500-2000h<-1>, filling in air till the molar ratio of the air to the water vapor is 0.05-0.2, controlling the regeneration temperature at 360-450 DEG C, conducting regeneration of the oxy-dehydrogenation catalyst, and c) reducing the amount of the vapor, allowing the temperature rise of a bed to be reduced gradually till the temperature at an inlet and an outlet of the catalyst bed keeps constant, and accomplishing the technical scheme of catalyst regeneration. The method solves the problems better, and can be used for industrial production of preparing butadiene through butylene oxy-dehydrogenation.

An oil-soluble multifunctional additive for heavy oil or fuel oil contains more surfactants, composite catalytic combustion adjuvant and detergent disperser, and is characterized by saving oil by 10-25%, increasing added water to 10-30% and eliminating black smoke. A process for preparing emulsified heavy oil or fuel oil is also disclosed.

The invention relates to a multiple physical technical disposal device which coul provide activated material and energy to fuel. It adopts four physical techniques which includes magnetization, fluctuation, supersonic wave and far infrared ray to deal with fuel, and makes physical oil adjunct. After dealed, put it with oil together, resonate with oil molecule, decrease the condensation, and the oil molecule crystalline constitution metamorphosis, then the oil viscidity and surface tension decline. The mixed mass of fuel and air increases, the air factor decreases, the burning velocity of oil, the temperature of burning area, and the viscidity of complete burning increase, ehile on the other hand, disposed fume decreases, the coking of spray nozzle is eliminated. Thus, the flow ability, flammability, cleaning ability are improved.

The related loop reactor for coal direct liquefaction comprises: an outside cylinder, a central tube, a gas distributor, a plurality of magnetic scrapers arranged equally between the cylinder and tube, a magnetic draw device, and a device frame. This invention improves material loop speed and turbulence strength to avoid coking and raise heat/mass transfer efficiency for wide application.

The invention relates to a regeneration method of an olefin isomerization catalyst. The problems that the catalytic activity is reduced after the olefin isomerization catalyst in the prior art is regenerated, and the olefin isomerization catalyst cannot regenerate in an apparatus and regenerate for a plurality of times are mainly solved. The regeneration method orderly comprises the following steps: a) leading in a gas which is inert to reaction in a reactor after reaction is stopped, and pre-purging the catalyst for 2-10 hours at 200-400 DEG C; b) leading into an oxygen gas until the oxygen content is 0.1-1mol%, burning until the temperature stops rising; c) heating to 420-500 DEG C, increasing the flow of the oxygen gas until the content of the oxygen is 1.5-5mol%, and burning until the temperature stops rising; d) heating to 520-600 DEG C, continuing to increase the flow of the oxygen gas until the content of the oxygen is 5.5-15mol%, and burning until the temperature stops rising; e) stopping leading in the oxygen gas, and continuing to purge the gas which is inert to the reaction via heat. By adopting the regeneration method, the problem is better solved; the regeneration method can be applied to regeneration of the olefin isomerization catalyst in industrial application.

The invention is mainly used for the field of petrochemical engineering and relates to the flow aid technology which promotes mixing of raw oil and catalysts and eliminates the problem that the inner wall face of a riser feeding mixing section (1) cokes in the catalytic cracking process. The technology includes the type and the flow of a flow aid, the sizes of flow aid nozzles, distribution of the flow aid nozzles, and the installation height and angles of the flow aid nozzles. The injected flow aid can inhibit formation and development of secondary flow at a raw oil sprayer, strong backmixing of oil on the wall face is eliminated, and coking is reduced. Besides, the jet injecting angle of the raw oil can be changed, part of the raw oil is made to be quickly separated from the edge wall and diffuse to the center, quick contact and mixing of the raw oil and the catalysts are achieved, and reaction efficiency is improved. The flow aid only has the function of promoting mixing of raw oil and catalyst, does not react in a system, and the flow is proper. The flow aid nozzles (2) are installed at the proper height of the upper portion of a raw oil atomizing nozzle installation sleeve (3). Besides, the reasonable nozzle size, the distribution mode and the installation angle are adopted to guarantee that the flow aid has the enough diffusion range and collision strength.

The invention belongs to the technical field of waste gas purification, and particularly relates to a device for decomposing trimethylamine malodorous gas. The device comprises a DBD (dielectric barrier discharge) gas discharging area, a deep ultraviolet light radiation area and a shallow ultraviolet light radiation area; the DBD gas discharging area consists of an inner dielectric layer, an outer dielectric layer, an inner electrode and an outer electrode; the inner electrode and the outer electrode adopt stainless steel spring structures; the deep ultraviolet light radiation area comprises an inner area airtight cavity and an outer area airtight cavity; the cavities are filled with argon and halogen mixed gas correspondingly, or are filled with rare gas xenon, and are mainly used for generating short-wavelength ultraviolet light with wavelength of about 200 nm or below; the shallow ultraviolet light radiation area is divided into an inner area airtight cavity and an outer area airtight cavity; the cavities are filled with krypton and halogen mixed gas correspondingly, or are filled with argon and mercury, and are mainly used for generating long-wavelength ultraviolet light with wavelength of about 250 nm. The device is compact in structure, can degrade trimethylamine gas, and has high efficiency, low energy consumption and high applicability.

A cleaning method of cationic partially oriented yarn (POY) spinning box adopts container with heating function as intermediate tank, triethylene glycol as cleaning medium and centrifugal pump as transport power source. The method comprises filling triethylene glycol into the intermediate tank, starting heating function to heat triethylene glycol to 120 DEG C, self-circulating triethylene glycol in bypass until reaching 270 DEG C, and controlling activation of switching valve to circulate triethylene glycol in circulation pipeline. Triethylene glycol enters the spinning box from its outlet, and leaves the spinning box from its inlet. The inventive cleaning method utilizes high-temperature centrifugal pump to circulate high-temperature triethylene glycol (270 DEG C) between the intermediate tank and spinning box, effectively dissolves pipe wall coke of spinning box to allow coke to flow out together with triethylene glycol, thereby effectively removing box interior coke, and achieving better cleaning effect and higher working efficiency.

The invention relates to a preparation method of environment-friendly C9 fuel oil. The preparation method of the environment-friendly C9 fuel oil comprises the following steps of: based on a fraction with the boiling range of 80 to 190 DEG C in the byproduct C9 fraction from ethylene cracking as a raw material, adding an extraction agent, placing in a water bath with the constant temperature of 30 DEG C, stirring for 1h, standing and layering for 1h, adding an additive in the separated oil, and continuing stirring for 1h to obtain the environment-friendly C9 fuel oil. In comparison with the prior art, the environment-friendly C9 fuel oil has the advantages of less sulphur content, good dispersibility and the like.

The invention discloses a production process of polyester FDY multi-roll oil-free full-draft fibers. The production process includes the following steps that polymerization is conducted in a final polymerization autoclave, raw materials are then processed by means of a melt conveying pump, a melt distributor and a melt booster pump in sequence, the obtained melt is conveyed and then processed by means of a melt cooler, a static mixer, a melt distribution valve and a spinning box in sequence, then the melt is extruded in a metering pump and processed by means of a spinning assembly, fiber cooling and molding is conducted, then semi-finished fibers are processed by means of a U-shaped ceramic piece, a secondary network, a spinning channel, a first additional U-shaped ceramic piece1, a second U-shaped ceramic piece 2, a first silk guide roller, a first-level hot pulling roller, a second-level hot pulling roller, a third-level hot pulling roller and a heat-setting hot roller in sequence, a lubricating nipple is used for oiling, and the obtained fibers are processed by means of a second silk guide roller, a primary network, a third silk guide roller and a guide wheel and subjected to coiling, doffing, quality testing and packaging. According to the production process of the polyester FDY multi-roll oil-free full-draft fibers, the product quality is improved, the running environment of equipment and the working environment of workers in a FDY production place are optimized, yarn path operation is simplified, and energy conservation and high efficiency are achieved.

The invention discloses a waste lubricating oil regeneration method and system. The regeneration system comprises a pretreatment system, an extraction and refining system and a regenerative system. According to the process of performing waste lubricating oil regeneration by the adoption of the regeneration system, waste lubricating oil is pretreated to obtain basic distillate oil, the basic distillate oil is subjected to solvent extraction and refining to obtain a lubricating oil basic oil product, an extraction phase obtained after extraction and separation is subjected to two-effect solventregenerative rectification, a heavy component obtained after two-effect regenerative rectification is subjected to first evaporation treatment, an evaporated solvent is used as an extraction solvent cyclically, and extracted oil obtained through extraction is used as a by-product. According to the method, by adjusting running parameters of the two-effect regenerative rectification and the first evaporation, the solvent regeneration effect is improved, solvent loss is reduced, operation energy consumption is lowered, and running stability is improved; and compared with the prior art, under thesame regenerative effect, energy can be saved by 40% or above, the solvent content in the heavy component is not greater than 0.5%, long-term stable running can be realized, and the method and systemare suitable for industrial large-scale production and utilization.

The invention provides a plasma pyrolysis reactor decoking system and a method thereof. The system comprises a pre-combustion chamber, a rapid combustion chamber, a shock wave ejector device and a reactor; secondary combustible gas is deflagrated in the rapid combustion chamber by the deflagration and ignition of the gas in the pre-combustion chamber, and the generated shock wave is introduced into the inner wall of the reactor through the shock wave ejector device. The decoking method comprises: initial deflagration is generated by the premixed combustion of primary combustible gas and oxygen; the introduced secondary combustible gas is ignited, reducing atmosphere is generated to enhance the combustion reaction; finally, powerful shock wave is generated and directly acts on the inner wall of the reactor. By adopting prefiring deflagration in the pre-combustion chamber, the secondary combustible gas in the rapid combustion chamber can be ensure to be burnt rapidly; as the generated shock wave energy is high, the coked inner wall of the reactor can be effectively cleaned, and a channel of the reactor is kept smooth; furthermore, the acting time of the shock wave is very short and only has the magnitude of 10 milliseconds, thus not affecting the normal work of plasma torch.

The invention relates to a coaxial settler-free gas-solid separation method and belongs to the technical field of petrochemical engineering and fluidization. The method is used for solving the problems of coaxial type devices that settlers undergo coking and excessive oil vapor thermal cracking. The method comprises the processes of rapid separation, second-stage separation, dipleg flutter valve discharge and oil vapor lead-out and is characterized in that due to a coaxial and settler-free design, external closed rapid cyclone separation is adopted to be mated with external second-stage separation, and catalyst diversion facilities are arranged; the catalyst diversion facilities are connected with the external rapid cyclone separation and the external second-stage separation, so as to form a closed separation system, and a catalyst, oil vapor and anti-coking steam, which are discharged from second-stage flutter valves, are closely guided to the closed separation system. The method has the advantages that the problem of coking of the settlers is eliminated; due to closed rapid cyclone separation, the gas-solid separation efficiency reaches over 98%, and the retention time of the oil vapor is shorter than 5 seconds, so that the reaction of excessive thermal cracking of the oil vapor is obviously reduced, the yield of dry gas is lowered, and the yield of products is increased; the discharging of diplegs is smooth, so that blow-by is avoided; the equipment investment is greatly reduced. The invention further provides an external closed rapid cyclone separator, an external second-stage separator and external catalyst diversion equipment, which are used for implementing the method disclosed by the invention. The method and equipment are applied to devices for catalytic cracking, catalytic pyrolysis and the like.

The invention relates to a settler-free two-stage-cyclone-series-connected gas-solid separation method and belongs to the technical field of petrochemical engineering and fluidization. The method is used for solving the problems of reaction that settlers undergo coking and excessive oil vapor thermal cracking. The method comprises the processes of two-stage gas-solid separation, dipleg flutter valve discharge and oil vapor lead-out and is characterized in that due to a settler-free design, the series connection of two stages of cyclone separation is designed, and catalyst diversion facilities are designed; the catalyst diversion facilities are connected with the two stages of cyclone separation, so as to form a closed separation system, and a catalyst and oil vapor, which are discharged from flutter valves, are closely guided to the closed separation system. The method disclosed by the invention has the advantages that the problem of coking of the settlers is eliminated; due to closed rapid cyclone separation, the gas-solid separation efficiency reaches over 98%, and the retention time of the oil vapor is shorter than 5 seconds, so that the reaction of excessive thermal cracking of the oil vapor is obviously reduced, the yield of dry gas is lowered, and the yield of products is increased; the discharging of diplegs is smooth, so that blow-by is avoided; the equipment maintenance is facilitated, and the equipment investment is greatly reduced. The invention further provides two stages of external cyclone separators, catalyst diversion equipment and dipleg flutter valves, which are used for implementing the method disclosed by the invention. The method and equipment are applied to devices for catalytic cracking, catalytic pyrolysis and the like.