11results about How to "Guaranteed long-term operation" patented technology

The application discloses an alkylation device with a circulating refrigerant impurity removal function, which comprises an alkali washing assembly, a water washing assembly, a depropanizing tower and a deisobutane tower; the alkali washing assembly and the water washing assembly are connected in series on a circulating refrigerant feeding conveying pipe; a water washing assembly discharge port is in pipeline communication with a depropanizing tower feeding inlet; and a depropanizing tower lower discharge port is in pipeline communication with a deisobutane tower feeding inlet. The device can remove SO2, sulfides such as mercaptans and free water in the circulating refrigerant of the alkylation device, thereby effectively reducing the plugging frequency of the depropanizing tower, improving the propane removal efficiency of the alkylation device system, avoiding the increase of the content of propane in the system, maintaining a better alkylene ratio in the circulating material and improving the quality of the obtained isooctane product.

This invention discloses a method for hydrotreating catalytic cracking slurry. A fixed-bed hydrotreating process is employed, comprising: in the presence of hydrogen, the catalytic cracking slurry sequentially contacts a hydrotreating protectant, a hydrotreating transition catalyst, and a hydrodesulfurization catalyst to undergo a hydrotreating reaction, yielding hydrotreated oil. The hydrotreating protectant comprises an alumina support with a most probable pore size of 40–100 nm, molybdenum oxide, and cobalt oxide. The hydrotreating transition catalyst comprises an alumina support containing additives and MoO3 and CoO. The support has a bimodal pore size distribution, with smaller pores concentrated in the 10–40 nm range and larger pores concentrated in the 150–400 nm range. This method eliminates the diffusion resistance during the adsorption and reaction of large molecules on the catalyst surface during the hydrotreating of catalytic cracking slurry, increases the capacity for more deposits such as coke, extends the operating cycle of the unit, and facilitates hydrodesulfurization and other reactions. It also increases the content of tricyclic and tetracyclic aromatics in the hydrotreated oil, making it a high-quality feedstock for needle coke production.

The utility model discloses a power transformation box fault monitoring device, and relates to the technical field of power transformation boxes. Inner walls of two sides of a box opening of a power transformation box are respectively provided with a chute arranged along the height direction of the power transformation box, and a horizontally arranged support rod is arranged between two corresponding chutes; a driving mechanism used for driving the supporting rod to reciprocate and ascend and descend along the sliding groove is arranged in the sliding groove. Infrared thermal imagers used for conducting thermal imaging scanning on the interior of the power transformation box along with reciprocating ascending and descending of the supporting rod are arranged on the upper portion of a rod body of the supporting rod. According to the utility model, through installing the infrared thermal imager capable of reciprocating lifting in the transformer box, convenient and efficient thermal imaging scanning can be carried out on cables and electric appliance switches in the transformer box, so that a worker can clearly and intuitively monitor the working state of electrical equipment according to image data obtained through thermal imaging scanning; and fault hidden dangers can be timely found.

A method for preparing a hydrodemetallization catalyst, belonging to the field of catalyst preparation technology, includes the following steps: impregnating spherical carbon particles with an iron-containing solution and drying them; mixing the dried carbon particles uniformly with alumina sol and forming droplets; drying and calcining the formed products to obtain an iron-modified alumina support; immersing the iron-modified alumina support in an organic ammonium solution for a first and second hydrothermal treatment; drying and calcining the treated products to obtain a treated alumina support; impregnating the treated alumina support with an active component impregnation solution; drying and calcining the impregnated support to obtain the hydrodemetallization catalyst. The catalyst prepared by this method exhibits high dehydrogenation, Ni removal, and V removal activity, while also possessing high tolerance for metal impurities. This catalyst is particularly suitable for the hydrotreating of heavy oil with high Ni impurity content.

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 application discloses a kind of stable column oil-gas separation control method, device, equipment and medium, belong to oil refining chemical industry field, control method includes: obtaining the product information of stable column;According to product information, it is judged whether product quality is qualified;If product quality is unqualified, then light gasoline is discharged from the intermediate material outlet of stable column;After light gasoline is discharged, control stable column carries out oil-gas separation processing, and obtains qualified liquefied gas and stable gasoline.The application increases the intermediate material outlet in the stable column, and the product is qualified without being used.If it cannot realize the qualification of liquefied gas and stable gasoline by appropriately increasing reflux ratio, the intermediate material outlet is used, and the light gasoline material is self-pressured to the main fractionating column top liquid separator or the fresh raw material buffer tank of catalytic cracking device, which reduces the difficulty of realizing the qualification of liquefied gas and stable gasoline, avoids the substantial benefit loss caused by the shutdown of catalytic cracking device, and ensures the long-period operation of stable column.

The utility model discloses a kind of automatic collection devices of leakage water of radial flow sedimentation tank sludge discharge gallery, including sedimentation tank, annular water-collecting tank being located at its periphery, water inlet pipe being connected with water-collecting tank bottom, and gallery sewage inlet on the sewage collection pool of sludge discharge gallery bottom;The water inlet pipe is connected with the sedimentation tank water inlet of water jet through water inlet gate, nozzle, suction chamber, throat pipe and diffusion pipe are sequentially arranged in water jet, diffusion pipe is connected into sedimentation tank sludge discharge pipe by water jet outlet pipe;Gallery sewage inlet covers and intercepts impurity screen surface.When the water level of sedimentation tank is higher than the bottom of annular water-collecting tank 50cm, high-pressure water flow forms negative pressure through water jet, and leakage water of sewage collection pool is automatically extracted and pressurized and discharged into sludge discharge pipe.The device realizes zero energy consumption, fully-automatic anti-blocking operation, and completely solves the energy consumption and fault problem of electric pump pumping.

This invention discloses a cooling elbow for a single-pipe heat exchanger of high-temperature titanium dioxide, comprising a pipe with a rectangular cross-section and an arc-shaped longitudinal section. A reinforcing layer is provided on the inner side of the material impact zone on the outer arc wall of the pipe, and a flow-guiding heat dissipation plate is also provided on the inner side of the outer arc wall. By designing the elbow as a rectangular pipe with a small curvature and an expanded diameter, this invention reduces material flow velocity and pressure. The angled flow-guiding heat dissipation plate on the inner wall of the elbow changes the airflow direction, mitigates material impact, and accelerates heat dissipation. The quickly removable and replaceable reinforcing layer on the material impact zone of the inner wall of the elbow increases the wear resistance of easily worn areas, prevents material erosion of the pipe, and ensures long-term operation of the elbow.

This invention discloses a green production method for biodiesel. First, pretreated feedstock oil and methanol are preheated and then fed into a reactor loaded with a superhydrophobic polymer solid acid catalyst for esterification. After oil-water separation, the oil phase is then fed into a reactor loaded with a macroporous strong-base ion exchange resin for transesterification. The biodiesel product is collected by vacuum distillation. The biodiesel production method provided by this invention has strong feedstock adaptability, no wastewater discharge, and excessive energy consumption. Methanol can be recycled, resulting in high feedstock utilization and product quality. Furthermore, the catalyst is simple to prepare, the reaction rate is fast, and the active phase is not easily lost.

The invention provides a composite hollow fiber membrane based on polysulfone and MIL-160 (Al) as well as a preparation method and application thereof, and belongs to the technical field of membrane materials, polysulfone is taken as a continuous phase, MIL-160 (Al) is taken as a dispersed phase, and the hollow fiber membrane with an asymmetric structure is formed; the preparation method comprises the following steps: carrying out activation and ultrasonic pre-dispersion on MIL-160 (Al), introducing the MIL-160 (Al) into a spinning solution containing polysulfone, a solvent and an additive, defoaming, carrying out dry-wet spinning forming, and fully washing and drying to obtain a final product. Through the introduction of MIL-160 (Al) and the synergistic effect of MIL-160 (Al) and polysulfone, the nitrogen-oxygen separation selectivity of the hollow fiber membrane is remarkably improved, meanwhile, the oxygen permeation flux is improved, the process is stable, and the prepared membrane has good mechanical performance and long-term operation stability.

The utility model relates to the technical field of cooling, in particular to a dividing wall type dry and wet combined cooling tower which comprises an air cooler, a cooling chamber is arranged on the side wall, corresponding to an air inlet, of the air cooler, a first air inlet hole is formed in the side wall, away from the air inlet, of the cooling chamber, and a dividing wall type heat exchange mechanism is arranged in the cooling chamber between the first air inlet hole and the air inlet. The air inlet end of the dividing wall type heat exchange mechanism corresponds to the position of the first air inlet hole, the air outlet end of the dividing wall type heat exchange mechanism corresponds to the position of the air inlet, the top of the dividing wall type heat exchange mechanism is a spraying water inlet end, the bottom of the dividing wall type heat exchange mechanism is a spraying water outlet end, and a spraying mechanism is arranged in the cooling chamber above the dividing wall type heat exchange mechanism; by means of the technical scheme, the air cooler solves the problem that an existing air cooler directly utilizes outside air to cool a medium to be cooled, and the cooling effect is prone to being affected.