6results about How to "Reduced coking tendency" patented technology

This utility model discloses a treatment device for mitigating coking of atmospheric residue oil, belonging to the field of petroleum processing technology. The device includes a vacuum furnace and a vacuum tower. The vacuum tower has a packing layer inside. Its key feature is that it further includes a hydrogenation reactor and a gas-liquid separator. The outlet of the vacuum tower is connected to the inlet of the hydrogenation reactor via a pipeline. The outlet of the hydrogenation reactor is connected to the inlet of the gas-liquid separator via a pipeline. The liquid phase outlet of the gas-liquid separator merges with the atmospheric residue oil feed stream and is then connected to the inlet of the vacuum furnace via a corresponding pipeline. The outlet of the vacuum furnace is connected to the inlet of the vacuum tower via a pipeline. This utility model, by adding a hydrogenation reactor and a gas-liquid separator and reorganizing the pipeline connections, allows the wash oil to be pretreated before mixing, fundamentally improving the thermal stability of the oil, reducing the coking tendency of the residue oil, and extending the operating cycle of the device.

The invention discloses a method for producing industrial white oil by hydrogenation. Paraffin-based, intermediate-based or cycloalkyl straight-run diesel is used as raw material, and firstly, hydrofining is performed; the hydrofining effluent is stripped by medium-pressure hydrogen to remove impurities such as H2S and NH3 that affect the reduction catalyst, and then enters the supplementary refining-isomerization dewaxing-post-refining reaction zone to reduce the pour point and aromatic content of the oil product and improve the color. The method of the invention can obtain high-quality Class II industrial white oil, while producing a small amount of light white oil as a by-product, and greatly reduces the energy consumption caused by the two-stage method of boosting-depressurization-boosting, and heating-cooling-heating, and has the characteristics of simple process and small footprint.

The invention discloses a device and a method for preparing chemicals by directly cracking crude oil. One end of the reaction tube penetrates through the top wall of the spouted bed and extends into the spouted bed; the flow guide pipe is arranged in the spouted bed and is communicated with the air inlet, and the flow guide pipe corresponds to one end, extending into the spouted bed, of the reaction pipe; the first induction heating device and the second induction heating device are respectively arranged on the outer wall of the vertical part of the reaction tube and the outer wall of the spouted bed; the input end of the separator is communicated with one end, far away from the spouted bed, of the reaction tube; the first output end of the separator is communicated with the input end of the cooling and separating device, and the second output end of the separator is communicated with the fine coke particle storage area; the first output end of the cooling and separating device is communicated with the cracking product area, the second output end of the cooling and separating device is communicated with the gas inlet, and the third output end of the cooling and separating device is communicated with the nozzle. The continuous fluidized discharge of the second coarse coke particles generated by the crude oil is realized, the coking tendency in the reaction tube is reduced, and the cracking and operation efficiency is improved.

The utility model relates to the technical field of petrochemical engineering, in particular to slurry bed residual oil hydrogenation fractionation equipment which comprises a slurry fractionating tower, a slurry feeding pipe and a hydrogen injection pipe are arranged on the side face of the slurry fractionating tower, the hydrogen injection pipe is located below the slurry feeding pipe, and a hydrogen distributor is arranged in the slurry fractionating tower. And the hydrogen distributor is connected with the hydrogen injection pipe. According to the utility model, hydrogen is uniformly sprayed out, is in uniform contact with materials and gradually rises, so that the temperature of the materials at the bottom of the slurry fractionating tower can be reduced, high-temperature dehydrogenation and polycondensation reaction can be relieved, meanwhile, the inner wall of the tower is purged, slurry coking in slurry reactor residual oil hydrogenation fractionating equipment can be inhibited, and stable and long-term operation of a slurry fractionating system is realized.

The invention relates to the technical field of waste incineration, in particular to a method for controlling the primary air temperature of a waste incinerator, which specifically comprises the following steps of: (1) calculating the water content Mar of garbage entering the incinerator according to the real-time water vapor content phi of flue gas at an outlet of a waste heat boiler; (2) calculating the required primary air temperature T0 according to the water content Mar of the garbage fed into the furnace; (3) arranging an electromagnetic valve and a flow measuring point Q on a steam pipeline entering the air pre-heater, and arranging a temperature measuring point T at a primary air outlet of the air pre-heater; according to the calculated primary air temperature T0, the opening degree of an electromagnetic valve is automatically adjusted to adjust the steam amount for heating the primary air pre-heater; and when the outlet temperature measuring point T of the air pre-heater is adjusted to be within the range of T0 + / -5 DEG C, the electromagnetic valve stops adjusting, and the steam quantity for heating the air pre-heater does not change any more. According to the method, the primary air temperature is controlled and adjusted through the steam content of the exhaust gas at the outlet of the waste heat boiler, and therefore the good combustion condition of garbage in the incinerator is guaranteed.

The present invention relates to the technical field of non-ferrous metal casting, and in particular to an environmentally friendly demoulding agent for aluminum ingot casting and a preparation method thereof. The demoulding agent comprises 45-75 parts of trimethylolpropane stearate, 15-45 parts of synthetic saturated hydrocarbon polymers, 1.5-5 parts of antioxidants, 0.05-5 parts of anti-wear agents, and 0.02-0.2 parts of non-ferrous metal corrosion inhibitors, in parts by weight. The weight ratio of the trimethylolpropane stearate to the synthetic saturated hydrocarbon polymer is (1-5): 1. The demoulding agent of the present invention has excellent wetting, spreading, and permeability, excellent anti-wear performance, high ignition point, low oil smoke, low coking tendency, and excellent hydrolysis resistance, and can greatly reduce the influence of cooling water on demoulding quality, and can also effectively control the pollution of cooling water, and the demoulding agent also has a high biodegradability, can ensure the surface quality of the ingot, improve casting efficiency, and reduce pollution.