41results about How to "Improve logistics distribution" patented technology

The invention discloses a residual oil hydrotreating-catalytic cracking combined process method which includes a hydropretreating reaction zone, a hydrotreating reaction zone and a catalytic cracking reaction zone; the process method includes the following contents: a residual oil raw material, at least part of a catalytic cracking diesel oil fraction and hydrogen are mixed, and in turn pass through the hydropretreating reaction zone and the hydrotreating reaction zone which are in series connection, after gas-liquid separation of a hydrotreating reaction zone reaction effluent, a gas phase is recycled back to the hydropretreating reaction zone and/ or the hydrotreating reaction zone, a liquid phase directly enters the catalytic cracking reaction zone for catalytic cracking reaction, a catalytic cracking reaction effluent is separated to obtain a dry gas, liquefied gas, a catalytic cracking gasoline fraction, a catalytic cracking diesel oil fraction, catalytic cracking heavy cycle oil and catalytic cracking oil slurry, and the catalytic cracking diesel oil is partially or totally recycled back to the hydrotreating reaction zone for hydrotreating reaction. The method can prolong the stable operation period of a device.

The invention discloses a hydrotreatment and catalytic cracking combined method of a heavy hydrocarbon raw material. According to the invention, an upflow reactor is at least connected in series with a downflow fixed bed reactor. The heavy hydrocarbon raw material passes through UFR and is mixed with a catalytic cracking heavy fraction, and the mixture enters the downflow fixed bed reactor. A hydrogenation reaction effluent is separated so as to obtain a liquid phase, and the liquid phase is subjected to catalytic cracking. The obtained catalytic cracking heavy fraction returns to an inlet of the downflow fixed bed reactor. According to the method, the catalytic cracking heavy distillate oil, which is introduced into the inlet of the fixed bed reactor, is beneficial to hydrogenation reaction and can significantly improve temperature rising of the bed when used as cutback oil and can minimize the amount of hydrogen injected through the inlet when used as a hydrogen donor, thus further raising cooperative effect of combined flow equipment and prolonging the running period as well.

The invention discloses a hydrotreatment and catalytic cracking combined method for residuum. The hydrotreatment and catalytic cracking combined method for residuum comprises the following steps that a residuum raw material and at least part of a catalytically cracked diesel fraction undergo a hydrotreatment reaction in the presence of hydrogen and a hydrotreatment catalyst in a hydrotreatment device; a hydrotreatment reaction effluent is subjected to gas-liquid separation; a gas phase is circularly used for a hydrotreatment reaction and a liquid phase directly enters into a catalytic cracking device without passing through a fractionation device and then undergoes a catalytic cracking reaction; a catalytic cracking reaction effluent is treated by the fractionation device so that dry gas, liquefied gas, a catalytically cracked gasoline fraction, a catalytically cracked diesel fraction, catalytically cracked recycle oil and catalytically cracked slurry are separated out; a part or all of the catalytically cracked diesel fraction is fed back to the hydrotreatment device and then undergoes a hydrotreatment reaction; and the catalytically cracked recycle oil is fed back to the catalytic cracking device and then undergoes a catalytic cracking reaction. Compared with the prior art, the hydrotreatment and catalytic cracking combined method for residuum can realize maximum-yield production of gasoline, save an equipment investment, fully utilize reaction heat and reduce production energy consumption.

The invention discloses a process for treating inferior oil, the process includes a hydropretreating reaction zone, a hydrotreating reaction zone and a catalytic cracking reaction zone; the process includes the following contents: a residual oil raw material and hydrogen are mixed, and in turn pass through the hydropretreating reaction zone and the hydrotreating reaction zone which are in series connection, after gas-liquid separation of a hydrotreating reaction zone reaction effluent, a gas phase is recycled back to the hydropretreating reaction zone and/ or the hydrotreating reaction zone, a liquid phase directly enters the catalytic cracking reaction zone for catalytic cracking reaction, a catalytic cracking reaction effluent is separated to obtain a dry gas, liquefied gas, a catalytic cracking gasoline fraction, a catalytic cracking diesel oil fraction, catalytic cracking heavy cycle oil and catalytic cracking oil slurry, and the catalytic cracking diesel and the catalytic cracking heavy cycle oil are partially or totally recycled back to the hydrotreating reaction zone for hydrotreating reaction. The method can prolong the stable operation period of a device.

The invention discloses a hydrotreatment and catalytic cracking deeply-combined method for residuum. The hydrotreatment and catalytic cracking deeply-combined method for residuum comprises the following steps that a residuum raw material, at least part of catalytically cracked heavy recycle oil and at least part of catalytically cracked slurry undergo a hydrotreatment reaction in the presence of hydrogen and a hydrotreatment catalyst in a hydrotreatment device; a hydrotreatment reaction effluent is subjected to gas-liquid separation; a liquid phase directly enters into a catalytic cracking device without passing through a fractionation device and then undergoes a catalytic cracking reaction; a catalytic cracking reaction effluent is treated by the fractionation device so that dry gas, liquefied gas, a catalytically cracked gasoline fraction, a catalytically cracked diesel fraction, catalytically cracked heavy recycle oil and catalytically cracked slurry are separated out; and a part or all of the catalytically cracked heavy recycle oil and the catalytically cracked slurry are fed back to the hydrotreatment device and then undergo a hydrotreatment reaction. Compared with the prior art, the hydrotreatment and catalytic cracking deeply-combined method for residuum can realize maximum-yield production of gasoline, save an equipment investment, fully utilize reaction heat and reduce production energy consumption.

The invention discloses a method for treating residual oil with hydrogenation treatment and catalytic cracking processes. A hydrogenation pretreatment reaction zone, a hydrogenation treatment reaction zone and a catalytic cracking reaction zone are contained; the method comprises steps as follows: a residual oil material and hydrogen are mixed and sequentially pass the hydrogenation pretreatment reaction zone and the hydrogenation treatment reaction zone which are connected in series; a reaction effluent in the hydrogenation treatment reaction zone is subjected to gas-liquid separation, a gas phase is recycled back to the hydrogenation pretreatment reaction zone and/or the hydrogenation treatment reaction zone, a liquid phase directly enters the catalytic cracking reaction zone for a catalytic cracking reaction, a catalytic cracking effluent is separated, and dry gas, liquefied gas, catalytic cracking gasoline fractions, catalytic cracking diesel fractions, catalytic cracking heavy cycle oil and catalytic cracking oil slurry are obtained, wherein parts of or all of catalytic cracking diesel and catalytic cracking oil slurry are recycled back to the hydrogenation treatment reaction zone for a hydrogenation treatment reaction. By means of the method, the stable operation cycle of a device can be prolonged.

The invention discloses a residual oil hydrogenation treatment and catalytic cracking combined processing method, which comprises: performing the hydrogenation reaction of a residual oil raw material in the presence of hydrogen and a hydrogenation treatment catalyst, and performing gas-liquid separation of efflux of hydrogenation reaction, wherein a gas phase is circularly used in a hydrogenation reaction, and a liquid phase is fractioned to form a light component and a heavy component; allowing a light component to enter a reactor from the bottom of a catalytic cracking riser reactor, allowing a heavy component to enter the reactor as secondary feed of the catalytic cracking riser reactor and performing a catalytic cracking reaction; and separating a dry gas, a liquefied gas and a gasoline fraction from efflux of a catalytic cracking reaction, wherein the fractions of diesel are not separated and enter a residual oil hydrogenation device after filtration. Compared with the prior art, the method can produce high-octane number gasoline and high-added-value liquefied gas to a maximum degree; meanwhile, the method can fully utilizes reaction heat and reduces production energy consumption.

The invention discloses a hydrotreatment and catalytic cracking combined method for residuum. The hydrotreatment and catalytic cracking combined method for residuum comprises the following steps that a residuum raw material and at least part of catalytically cracked heavy recycle oil undergo a hydrotreatment reaction in the presence of hydrogen and a hydrotreatment catalyst in a hydrotreatment device; a hydrotreatment reaction effluent is subjected to gas-liquid separation; a gas phase is circularly used for a hydrotreatment reaction and a liquid phase directly enters into a catalytic cracking device without passing through a fractionation device and then undergoes a catalytic cracking reaction; a catalytic cracking reaction effluent is treated by the fractionation device so that dry gas, liquefied gas, a catalytically cracked gasoline fraction, a catalytically cracked diesel fraction, catalytically cracked heavy recycle oil and catalytically cracked slurry are separated out; and a part or all of the catalytically cracked heavy recycle oil is fed back to the hydrotreatment device and then undergoes a hydrotreatment reaction. Compared with the prior art, the hydrotreatment and catalytic cracking combined method for residuum can realize maximum-yield production of gasoline, save an equipment investment, fully utilize reaction heat and reduce production energy consumption.

The invention discloses a head baffle of a plate-fin heat exchanger. A head comprises a fluid inlet tube and an arc head. A baffle is disposed in the middle of arc structure of the arc head. 1-3mm of thickness of the baffle is recommended. The baffle is provided with a plurality of through holes. The diameter of each through hole is one fifth of that of the inlet tube. Spacing of both transverse and longitudinal holes is half of the hole diameter. The through holes arrayed on the baffle include three feature regions, namely an inlet tube projection region, a projection peripheral region and a bilateral symmetry region. The baffle structure is provided according to the logistical distribution feature of the traditional head. The diameter of the through holes is defined. The head baffle is simple and practical. Logistical distribution condition inside the head is improved effectively. The structural parameters of the baffle are defined according to the structural size of the head, so that the head baffle is universal, can be used as design basis and is important to improving heat exchange performance of the plate-fin heat exchanger.

The invention discloses a method for treating an inferior oil product by a combined process. The method comprises the following steps: allowing an inferior oil raw material and hydrogen to enter a mixer for saturated hydrogen dissolution, and allowing an obtained mixture to pass through a hydropretreating zone; and separating a reaction effluent, allowing a separated reaction effluent and catalytic-cracked circulating oil to enter a hydrotreating reaction zone, separating an obtained reaction effluent, allowing obtained hydrotreated residual oil to undergo a catalytic cracking reaction, allowing obtained circulating oil and/or an oil slurry to be circulated to a hydropretreating reaction zone, and allowing a part of obtained circulating oil to be circulated to the hydrotreating reaction zone; wherein the reaction temperature t1 of the hydropretreating reaction zone is higher than the reaction temperature t2 of the hydrotreating reaction zone. The method provided by the invention can increase the utilization rate of a main hydrotreating catalyst, prolongs the operation cycle of a combined device, and increases the operation efficiency of a device.

The invention discloses a method for treating inferior residual oil by a combined process. The method includes the steps that after heavy oil raw oil is saturated and dissolved in hydrogen, firstly, hydrodemetallization and partial desulfurization are carried out in a hydrotreating pretreatment area; the reaction effluent is saturated and dissolved in hydrogen again and then enters a hydrotreatingreaction area for hydrodesulfurization and hydrodenitrification; the reaction temperature in the hydrotreating pretreatment reaction area is higher than that in the hydrotreating reaction area. According to the method, the hydrotreating pretreatment reaction area reacts at a higher temperature, most of metal impurities in materials can be removed, so that the deactivation reason of a desulfurization catalyst and/or denitrification catalyst in the hydrotreating reaction area is changed from previous metal deposition and carbon deposition deactivation to only carbon deposition deactivation, further the desulfurization catalyst and denitrification catalyst can be subjected to regeneration treatment after being used a cycle, the operation cycle of a hydrogenation unit is prolonged, and thus the operation efficiency of the unit is increased, and the economy is improved.

The invention discloses a series alternate residual oil hydrotreatment-catalytic cracking combined process method and system. The method comprises the following steps: mixing a residual oil raw material and at least part of a catalytically cracked diesel fraction with hydrogen, allowing the obtained mixture to sequentially pass through a hydrogenation pretreatment zone and a hydrotreating reactionzone which are connected in series, carrying out gas-liquid separation on the reaction effluent of the hydrotreating reaction zone, and allowing the separated liquid phase to directly enter a catalytically cracked reaction zone to carry out a catalytic cracking reaction. The hydrogenation pretreatment reaction zone comprises N hydrogenation pretreatment reactors, the first hydrogenation pretreatment reactor to the N-1th hydrogenation pretreatment reactor are sequentially connected in series and are used as N1-stage online hydrogenation pretreatment reactors, and the Nth hydrogenation pretreatment reactor is used as an offline hydrogenation pretreatment reactor. According to the method and the system, the operation time of the hydrotreating pretreatment process is long without shutdown, the stable exertion of the overall catalytic activity of the hydrotreating main catalyst is facilitated, reasonable and limited alternating times are ensured, and the operation time and the working efficiency of the hydrotreating reactor are prolonged.

The invention discloses a production method of gasoline and low-sulfur marine fuel. The production method comprises the following steps: (1) carrying out hydrogenation reaction on a residual oil raw material in the presence of hydrogen and a hydrotreating catalyst; (2) carrying out gas-liquid separation on an effluent of the hydrogenation reaction, circulating a gas phase to the hydrogenation reaction in the step (1), taking a liquid phase as mixed hydrogenation generated oil, not fractionating the mixed hydrogenation generated oil, throwing a part of the mixed hydrogenation generated oil as low-sulfur marine fuel, feeding the rest of the mixed hydrogenation generated oil into a catalytic cracking device, and carrying out catalytic cracking reaction; and (3) mixing a catalytic cracking heavy fraction obtained after dry gas, liquefied gas and catalytic cracking gasoline are separated from the effluent of the catalytic cracking reaction, used as heavy cycle oil, with the residual oil raw material in the step (1) for hydrogenation reaction. The combined process provided by the invention can be used for producing high-octane catalytic cracking gasoline and low-sulfur marine fuel products to the maximum extent. Meanwhile, hydrogenation load is reduced, a catalytic cracking fractionation system is simplified, and equipment investment and operation energy consumption are reduced.