43results about How to "Emission reduction and efficiency increase are beneficial" patented technology

The present invention discloses a method for producing clean fuel oil by using a waste plastic and a high aromatic component. According to the method, a high aromatic component and waste plastic oil are mixed and then enter a thermal cracking reaction zone, the thermal cracking reaction zone adopts the gradual heating and constant temperature operation combined way, the obtained cracking gas re-enters a catalytic reaction zone and contacts a catalyst in the catalytic reaction zone so as to carry out a catalytic reaction, and the obtained reaction effluent is subjected to gas-liquid separation to obtain the gas product and the liquid-phase oil product. With the method of the present invention, the waste plastics and the high aromatic components can be completely utilized, the lightweight fuel oil yield can be increased and can achieve more than or equal to 85%, and the quality of the obtained diesel fuel is good.

The invention discloses a method for hydrogenating ethylene tar, which selects an appropriate cutting point to fractionate the ethylene tar into a light fraction and a heavy fraction aiming at the characteristics of high content of arene, colloid, carbon residue and asphaltene in the ethylene tar. The light fraction passes through a hydrogenation protection catalyst, a hydrofining catalyst, a hydrogenation and carbon residue-removing catalyst and a hydrocracking catalyst sequentially to obtain a gasoline fraction and a diesel oil fraction; and the heavy fraction passes through the hydrogenation protection catalyst, the hydrogenation and carbon residue-removing catalyst and a hydro-conversion catalyst sequentially to obtain a gasoline fraction and a diesel oil fraction. According to the component characteristics of the light fraction and the heavy fraction of the ethylene tar, the method selects different hydrogenation schemes so as to convert the ethylene tar into fuel oil to a great extent, increase the additional value of the ethylene tar and make the device operate for a long time.

The invention discloses a processing method for by-products of ethylene equipment. The method includes: mixing ethylene tar and heavy benzene, passing the mixture firstly through a thermal cracking reaction area and a catalytic reaction area, condensing the reaction effluent, then leading the condensed product into an oil-water separator to undergo gas-liquid separation so as to obtain a gas product and a liquid phase oil product respectively, remaining the residue generated during reaction in the cracking reaction area, collecting the gas product to serve as a fuel gas, fractionating the liquid phase oil product to obtain light fraction and heavy fraction, mixing the light fraction with ethylene cracked C9 fraction, then leading the mixture into a hydrofining reaction area, passing the heavy fraction through the hydrofining reaction area and a hydrocracking reaction area in order, mixing the hydrocracking product with the light fraction hydrofining product and bringing the mixture into a separation system to undergo separation, thus obtaining gasoline and diesel fractions. According to the method provided by the invention, full-range ethylene tar can be fully utilized, and the obtained gasoline fraction yield is greater than 70%, the obtained gasoline and diesel have good quality, and the added value of ethylene tar is improved.

The invention discloses a method for increasing the yield of clean fuel oil. The method comprises the following steps: subjecting ethylene tar to fractionation so as to obtain a light fraction and a heavy fraction, mixing the heavy fraction with a conventional coking raw material, then subjecting the mixture to a delay coking treatment so as to obtain a coking product, transporting the coking product and a C9 component from an ethylene device into a coking distillation tower, carrying out a distillation treatment so as to obtain a coking gasoline fraction and a coking diesel oil fraction, carrying out a hydro-refining treatment on the obtained coking gasoline fraction, mixing the coking diesel oil fraction with the ethylene tar light fraction, then subjecting the mixture to a hydro-treatment, and separating the products so as to obtain a gasoline product and a diesel oil product. The method fully utilizes the ethylene tar and C9 fraction, improves the utilization rate of by-products of ethylene device, prominently improves the yield and quality of lightweight fuel oil, and is beneficial for yield increasing of high quality clean fuel oil for refineries.

The invention discloses a processing method of ethylene tar. The method consists of: fractionating ethylene tar into light fraction and heavy fraction, mixing the heavy fraction with a conventional coking raw material, conducting delayed coking to obtain coker gasoline, coker diesel oil and coker gas oil, mixing the obtained coker gasoline and coker diesel oil with the ethylene tar light fraction, leaving the mixture to undergo a hydrofining reaction, distilling the product to obtain gasoline fraction I and fraction heavier than gasoline; mixing the fraction heavier than gasoline with the coker gas oil, and subjecting the mixture to hydrotreating so as to obtain gasoline fraction II and a diesel oil product, and mixing the gasoline fraction I with the gasoline fraction II to obtain a final gasoline product. Directed at the characteristics of high content of aromatic hydrocarbon, colloid, carbon residue and asphaltene in ethylene tar, the method provided in the invention fractionates the ethylene tar into light fraction and heavy fraction, adopts different processing processes, increases the added value of ethylene tar, enhances the yields of gasoline and diesel oil, improves the product quality of light fuel oil, and also enables the equipment to run smoothly for a long period.

The invention discloses a hydro-cracking method for blending ethylene bottom oil, which is different from the method for processing the conventional ethylene bottom oil and comprises the following steps: blending an ethylene bottom oil light end into a conventional hydro-cracking raw material for hydro-cracking, in the presence of hydrogen, sequentially contacting the ethylene bottom oil light end with a hydro-guard catalyst, a hydro-refining catalyst, a hydro-residue carbon removing catalyst and a hydro-cracking catalyst; separating an effluent of hydro-cracking reaction to obtain light fueloil. The method of the invention adopts a method of grading the hydrogenation catalyst, can process the ethylene bottom oil light end and produce diesel oil having a high cetane number and a low condensation point and a naphtha having high arene, and is not obviously changed in a BMCI value of tail oil and a smoke point of a jet fuel when compared with the conditions before blending the ethylene bottom oil.

The invention discloses a method for processing ethylene tar, which selects an appropriate cutting point to fractionate the ethylene tar into a light fraction and a heavy fraction aiming at the characteristics of high content of arene, colloid and carbon residue in the ethylene tar. The light fraction passes through a hydrogenation protection reaction zone, a hydrofining reaction zone and a hydrocracking reaction zone sequentially to obtain a gasoline fraction and a diesel oil fraction; and the heavy fraction is used as a universal type carbon fiber asphalt stock. The method for processing the ethylene tar makes full use of the total fraction of the ethylene tar and increases the additional value of the ethylene tar. In addition, the method enables the arene after hydrostturation in the ethylene tar to open ring, crack moderately and / or isomerize by selecting two types of hydrocracking catalysts to perform grading loading so as to obtain the diesel oil fraction with condensation pointless than -40 DEG C in high yield and obtain a side product high-octane gasoline fraction at the same time.

The invention discloses a treatment method of ethylene tar. The method consists of: fractionating ethylene tar into light fraction and heavy fraction, mixing the heavy fraction with a conventional coking raw material, conducting delayed coking to obtain coker gasoline, coker diesel oil and coker gas oil, mixing the coker diesel oil with the ethylene tar light fraction, performing rectification / crystallization purification to obtain naphthalene, mixing the naphthalene removed oil, naphthalene after-cut oil, with the coker gasoline and the coker gas oil, taking the obtained mixture as a hydrotreating raw material, leaving the material to undergo a hydrofining reaction, separating gasoline fraction I, subjecting the obtained fraction heavier than gasoline to hydrocracking so as to obtain gasoline fraction II and a diesel oil product, and mixing the gasoline fraction II with the gasoline fraction I so as to obtain a final gasoline product. Directed at the characteristics of high content of aromatic hydrocarbon, colloid, carbon residue and asphaltene in ethylene tar, the method provided in the invention fractionates the ethylene tar into light fraction and heavy fraction, and adopts different processing processes, thus increasing the added value of ethylene tar. While generating the chemical raw material naphthalene, the method also improves the product quality of light fuel oil, and also enables the equipment to run smoothly for a long period.

The invention discloses a method for processing ethylene tar. Aiming at the characteristic of high contents of colloid, asphaltene and carbon residue in the ethylene tar, the method comprises the following steps of: performing fractional distillation on the ethylene tar to obtain light and heavy fractions, and treating heavy fractions by adopting a solvent deasphalting method to obtain deasphalted oil and deoiled asphalt; and mixing the deasphalted oil, the light fraction of the ethylene oil and hot low-grade oil, and making the mixture pass through a hydrogenation protecting reaction area, a hydrogenation refining reaction area and a hydrocracking reaction area in turn to obtain hydrocracking crude oil, wherein partial hydrocracking crude oil is circulated and mixed with the deasphalted oil and the light fraction of the ethylene tar to enter the hydrogenation reaction areas, the rest hydrocracking crude oil is separated to form gasoline and diesel fractions, and the deoiled asphalt serves as a general carbon fiber asphalt material. By the method, the problem of high temperature rise of a hydrogenation reactor bed can be effectively solved, full fractions of the ethylene tar are fully utilized, and the added value of the ethylene tar is improved.