71results about How to "Short renovation period" patented technology

The invention discloses a distillate yield improving vacuum distillation method and device. A flash vaporization vessel is arranged on an oil transfer line between a vacuum furnace and a vacuum distillation tower. Vacuum distillation raw materials enter the oil transfer line and the flash vaporization vessel after being heated by the vacuum furnace. Gas liquid separation is carried out in the flash vaporization vessel: liquid discharged from the bottom of the flash vaporization vessel, namely flash bottom oil, is introduced into the vacuum distillation tower; and gas discharged from the top of the flash vaporization vessel, namely flash top gas, is led out of the device after being condensed into liquid. According to the vacuum distillation method and device with the flash vaporization vessel arranged behind the vacuum furnace, on one hand, the yield of vacuum distillate is increased, on the other hand, a conventional decompression oil transfer line low-speed section is omitted, the operation load of the vacuum tower is reduced, and the diameter of the vacuum tower can be appropriately reduced, so equipment investment is saved, and the operating cost is reduced.

The invention discloses a crude oil processing method, which comprises normal-pressure distillation and reduced-pressure distillation, wherein the heavy oil at the bottom of a normal-pressure distillation tower, namely normal bottom oil, is mixed with part of circular reduced-pressure residual oil at the bottom of a reduced-pressure distillation tower, the mixture enters a flash tower, and a top gas phase, namely flash top gas, of the flash tower undergoes heat exchange and is condensed into a liquid phase to be discharged out of the device as a product; and bottom oil, namely flash bottom oil, of the flash tower, is heated in a reduced-pressure furnace to 390 to 420 DEG C, the heated bottom oil is intruded into a flash section of the reduced-pressure distillation tower from a reduced-pressure oil transfer line for reduced-pressure distillation, proper distillate product is drawn from a side line of the reduced-pressure distillation tower, part of reduced-pressure residual oil drawn out from the bottom of the reduced-pressure distillation tower is circulated, and another part of the reduced-pressure residual oil is discharged of the device. Compared with the prior art, the method can effectively improve the drawing rate of a reduced-pressure distillation process and can reduce the load of the reduced-pressure furnace and the reduced-pressure distillation tower at the same time.

The invention provides a reducing sizing mill with a short roller body, four upright posts and no house for bars. The reducing sizing mill consists of axial adjusting devices, upright posts, depressing devices, connecting rods, supporting seats, short roller body rollers, bearing blocks, roller shafts, taper sleeves, handles and roller rings. The reducing sizing mill is characterized by further comprising the short roller body rollers, wherein the ratio of the length to the diameter of the roller body of each roller is smaller than or equal to one second of the short roller; the short roller body roller is a combined roller; the reducing sizing mill is of a four-upright-post houseless structure; each depressing device is connected with the corresponding bearing block of each roller through the upright posts; the upright posts are fixed on the corresponding supporting seats; each short roller body roller is arranged in the corresponding bearing block through a bearing; each axial adjusting device is connected with the corresponding bearing block; each connecting rod is connected with the corresponding supporting seat; each supporting seat is fixed on a foundation base. The reducing sizing mill has the advantages that a four-upright-post houseless high-rigidity rolling mill is combined with the short roller bodies, so that the integral rigidity of the rolling mill can be improved, a jumping value of the roller under the same rolling force is reduced, and further the dimensional precision of rolled pieces is improved; the four-upright-post houseless high-rigidity rolling mill is combined with a low-temperature controlled rolling process, so that structure properties of the rolled pieces can also be improved.

The invention discloses a sectional feeding vacuum distillation method and an apparatus for crude oil. The method comprises the steps of omitting relatively long transfer line from the outlet of a vacuum furnace to the vacuum tower; arranging a flashing tower between the vacuum tower and a vacuum distillation tower; passing superheated steam through the bottom of the flashing tower; introducing the raw materials of vacuum distillation to the flashing tower through the vacuum furnace after being heated; educing relative light components (hereinafter referred to flashing top gas) in the flashing tower from the tower top after steam stripping evaporation; entering below a packing layer of some fractioning section of the vacuum distillation tower; and introducing the liquid phase (hereinafter referred to flashing bottom oil) educed from the bottom of the flashing tower to the feeding section of the vacuum distillation tower to perform vacuum distillation. The sectional feeding vacuum distillation method and the apparatus for the crude oil can obviously increase pull-out rate of the vacuum distillation process and improve the quality of the vacuum distillates.

The invention discloses a deep reduced pressure flash tank and a reduced pressure deep distillation method. The reduced pressure flash tank comprises a tank body and internal members of the tank. The internal members comprises a feeding inlet distributor arranged in a gas phase zone at the upper part of the reduced flash tank and a rotary disk arranged above a liquid surface of the lower part liquid phase zone, wherein the rotary disk is fixed on a rotary shaft arranged in an axis direction of the tank body. In the reduced pressure deep distillation method, the reduced pressure flash tank is arranged behind the reduced pressure tower; the atmospheric pressure bottom oil is heated by a reduced pressure furnace and introduced to the reduced pressure tower through a reduced pressure transfer line; reduced pressure light fraction oil is pumped out from the lateral line of the reduced pressure tower; reduced pressure heavy oil is pumped out from the bottom of the tower and introduced to the reduced pressure flash tank; the obtained gas phase is introduced to a gas-liquid separation tank; the reduced pressure light fraction oil is discharged from the bottom of the gas-liquid separation tank; and the flashed reduced pressure residual oil is discharged from the bottom of the reduced pressure flash tank. The deep reduced pressure flash tank and the reduced pressure deep distillation method can obviously increase distillation yield during a distillation process of crude oil, reduce energy consumption during the process and increase economic benefits of the apparatus.

The invention provides a wet desulfurization flue gas ultra-clean emission treatment system. The treatment system comprises: supercharging atomizing equipment, which is used for humidifying desulfurization flue gas to obtain humidified flue gas; purification equipment, which is connected to the supercharging atomizing equipment, and is used for purification of the humidified flue gas to realize gas-liquid-solid separation, thus obtaining clean flue gas and flue dust containing liquid water; and circulating water filtration equipment, which is connected to the purification equipment to filter flue dust containing liquid water so as to obtain filtered liquid water, which can be recycled by the supercharging atomizing equipment. While realizing flue gas purification, the wet desulfurization flue gas ultra-clean emission treatment system provided by the invention recycles moisture in the flue gas, has powerful water saving function, basically can achieve zero water replenishment, and saves cost.

The invention discloses a composite limestone / calcium hydroxide gypsum wet desulfurization device and technique. The device comprises a fume cleaning part, an absorbent supply part, a slurry oxidization part and a gypsum dehydration part, wherein the desulfurization absorbent adopts a limestone / calcium hydroxide slurry, and the calcium hydroxide slurry is added from the opening of a circulating pump pipeline of an absorption tower. The technique disclosed by the invention can be obtained by performing technical modification on a traditional limestone gypsum wet technique, can fully utilize the existing equipment under the condition that the sulfur dioxide concentration is less than 200mg / m<3> more than the standard, and can use the allowance of the existing equipment without adding capacity; when the load of the set or the sulfur content of the coal is high, the composite fume desulfurization technique can be started, so the operation is flexible; and the device and technique have the advantages of low investment cost, basically constant system operation resistance, manufacturing cost saving, short modification period, low operating cost, no influence on the absorption tower oxidization system and gypsum dehydration system, and constant desulfurization byproduct composition.

The invention relates to a hybrid direct current transmission topology system, which includes a rectification-side converter station and an inverter-side converter station connected to the rectification-side converter station. The rectification-side converter station includes a rectification-side converter transformer and a grid commutation converter , the inverter side converter station includes a modular multilevel converter using a full-bridge sub-module topology or a mixture of a full-bridge sub-module topology and a half-bridge sub-module topology, and an inverter connected to the modular multi-level converter side converter transformer. The hybrid DC power transmission topology system can be based on the traditional DC power transmission system, by replacing the grid commutation converter on the inverter side with a full-bridge sub-module topology or a mixture of full-bridge sub-module topology and half-bridge sub-module topology. The modular multilevel converter transforms the traditional DC transmission system into a flexible DC converter station, thus forming a hybrid DC topology. By retrofitting on the basis of the traditional DC transmission system, it is possible to make full use of the traditional DC transmission primary equipment at the transformed end, reduce the number of additional purchased equipment, shorten the renovation period, and reduce costs.

The invention discloses a reinforcement method for concrete poles of a transformer substation structural support. The reinforcement method is characterized in that steel tubes are additionally arranged on the outer sides of concrete poles of the transformer substation structural support and poured with grout to form a steel tube reinforced concrete structure; the steel tubes, the grout and the concrete poles are jointly combined to form a new stress system, thereby achieving the purpose of reinforcing a transformer substation structure and an equipment support frame; besides, as the outer steel tubes are mounted by adopting a lifting method, aloft work is avoided, and a new reinforcement technology is provided for the concrete support of a transformer substation, the reinforcement method is suitable for reinforcement of concrete poles of n-shaped and T-shaped structural supports, the reinforced concrete poles of the structural supports can meet the requirements on bearing capacity and durability, the service life of the transformer substation is prolonged, large-scale reconstruction is not needed, the construction approval process is simple and time-saving, and the characteristics of reduced upgrading and reconstruction cost, shortened reconstruction period, high safety and reliability are achieved; meanwhile, the original concrete support does not need to be dismantled, emission of a great deal of construction waste is avoided, and resources are saved, so that the reinforcement method is an environment-friendly reinforcement and reconstruction technology.

The invention discloses a distillate yield improving vacuum distillation method and device. A flash vaporization vessel is arranged on an oil transfer line between a vacuum furnace and a vacuum distillation tower. Vacuum distillation raw materials enter the oil transfer line and the flash vaporization vessel after being heated by the vacuum furnace. Gas liquid separation is carried out in the flash vaporization vessel: liquid discharged from the bottom of the flash vaporization vessel, namely flash bottom oil, is introduced into the vacuum distillation tower; and gas discharged from the top of the flash vaporization vessel, namely flash top gas, is led out of the device after being condensed into liquid. According to the vacuum distillation method and device with the flash vaporization vessel arranged behind the vacuum furnace, on one hand, the yield of vacuum distillate is increased, on the other hand, a conventional decompression oil transfer line low-speed section is omitted, the operation load of the vacuum tower is reduced, and the diameter of the vacuum tower can be appropriately reduced, so equipment investment is saved, and the operating cost is reduced.