The way coking of petroleum residues
(57) Abstract:Describes how coking of petroleum residues, including heating chamber coking, heating of the raw material and submitting it together with the distillate fraction of coking as a coolant in the lower part of the chamber coking. The method differs in that, as specified distillate fractions use fraction 200 - 500°C distillate coking, which before it enters the chamber is heated to coking temperatures above 50 To 60°C temperature of the raw material. While the coolant is fed into the coke box to complete the process of coking raw material in the upper part of the chamber, and the coolant is fed into the coke box for additional heating chamber after the supply of water vapor and vapor of coking. The technical result is to improve the quality of coke. 2 C.p. f-crystals, 1 tab., 1 Il. The invention relates to the field of oil refining, in particular to methods for delayed coking of petroleum residues, and can be used to produce petroleum coke.There is a method of coking of petroleum residues, including pre-heating of raw materials, mixing it with a recirculating products of coking at the bottom of the distillation to theoC and at a fraction with the beginning of the boil 500oC, heating fraction with the end of the boil 500oC in a furnace to a temperature above 520oC and serving as a heat carrier, together with the fraction with the beginning of the boil 500oC in the lower part of the coke oven chamber (Ed. mon. N 975778, class C 10 B 55/10, 1981). Before submission of camera raw coking pre-heated water vapor and steam products coking with the next cell.The disadvantages of this method of coking - low quality coke due to insufficient high temperature coking and due to the uneven temperature coking height of the camera. In addition, the process of acceleration VAT residue leads to additional energy consumption for the creation of a deep vacuum.Closest to the claimed object to the technical essence is a way of coking of petroleum residues, including heating oil residue, followed by coking in the coking chamber, the exhaust steam and gas products, separating them into fractions with separation of high-boiling fraction with a boiling point above 350oC, which is heated to 480-520oC for 1-8 MPa and the coolant is fed into the coke box (Ed. mon. N 1084286, class C 10 B 55/00, 1977). Before on the.The disadvantage of this method is the limited temperature of the heated fluid (520oC) and temperature in the chamber coking due to the high temperature end of the coolant boiling (above 500oC), which degrades the quality of coke. In addition, in the lower and upper part of the chamber also produces coke of lower quality because of the lower temperature coking than in the Central portion of the chamber.The invention is aimed at improving the quality of coke due to the increase of the temperature of coking and align it according to the height of the camera.This is achieved by the fact that in the method of coking of petroleum residues, including heating chamber coking steam and combined cycle products of coking, heating of the raw material and submitting it together with the distillate fraction of coking as a coolant in the lower part of the chamber coking, as specified distillate fractions use fraction 200-500oC distillate coking, which before it enters the chamber is heated to coking temperatures above 50-60oC temperature of the raw material.It is advisable specified coolant to continue to serve in the chamber of coking and after cessation of raw material into the chamber to complete prova.The drawing shows a schematic diagram of the proposed method.Before the cycle of the coking chamber 1 is heated with water vapor and steam products coking working camera, and then for additional warm-up camera in it served by pipeline 2 coolant. The oil balance pipe 3 is directed in a tubular furnace 4, heated to 380-400oC and served in the distillation column 5 where it contacts with the combined products of coking coming through the pipe 6 from the upper part of the chamber 1. From distillation column 5 the mixture of raw materials with the recirculator coming in column 5 to line 7, serves on line 8 in the lower part of the chamber 1, after heating it in the furnace 9 to 480-500oC. battery distillation columns are selected fraction 200-500oC distillate coking, which is heated to 540-560oC in a tubular furnace 10 and the coolant in the pipe 2 serves in the lower part of the chamber coking in the mixture of raw materials. After the termination of the supply of raw materials continue to supply coolant to the full completion of the coking process in the upper part of the chamber.Examples 1-3. In the above-described technology is e raw material was used cracking residue sulfur oil with cocking behavior on Conradson 19%. Mode coking, yield and quality of chars obtained are shown in table.Example 4 (the prototype). Using the same raw materials as in examples 1-3 was obtained coke in the method prototype to pilot the delayed coking unit. As a coolant selected from the distillation column heavy distillate fraction 350-525oC, which prior to being fed into the coke box was heated to 520oC. Mode of coking, yield and quality of the coke obtained is shown in the same table.As can be seen from the table, the proposed method (examples 1-3) coke is produced of higher quality (higher density, mechanical strength, following the release of volatile substances, the specific resistivity) than the prototype method (example 4). In addition, the yield of coke increased to 32% wtThus, using as a coolant fraction 200-500oC distillate coking, which prior to being fed into the lower part of the chamber coking heated at 50-60oC higher than the raw materials, the supply of the specified fluid to complete the coking raw material in the upper part, as well as additional heating chamber coking this carrier will provide in comparison with the prototype of the received coke.It should be noted that the proposed method can be used to get coke is of the same quality as in the prototype, this will increase the turnaround mileage installation coking by reducing coking of the tubes. 1. The way coking of petroleum residues, including heating chamber coking, heating of the raw material and submitting it together with the distillate fraction of coking as a coolant in the lower part of the chamber coking, characterized in that, as specified distillate fractions use fraction 200 - 500oC distillate coking, which before it enters the chamber is heated to coking temperature above 50 - 60oC temperature of the raw material.2. The method according to p. 1, characterized in that the heat carrier is fed into the coke box to complete the process of coking raw material in the upper part of the chamber.3. The method according to PP.1 and 2, characterized in that the heat carrier is fed into the coke box for additional heating chamber after the supply of water vapor and vapor of coking.
FIELD: oil production; trapping hydrocarbons in slow coking plants.
SUBSTANCE: proposed plant includes reservoir for receiving the products heating the coking reactors with piping system equipped with pumps discharging non-conditioned oil products and pipe lines discharging gas for rectification or sprinkling into scrubber for steaming and cooling the coke at discharge of gas into atmosphere and drainage of water condensate into disposal system through hydraulic seal; hydraulic seal is connected via vibrating sieve with near-reactor coke accumulator combined with gravity filter; above-sieve part of vibrating sieve is connected with near-reactor coke accumulator and under-sieve part is connected via gravity filter with deepened circulating water reservoir or with disposal system. Proposed plant makes it possible to return some components of water condensate and cool coke at simultaneous discharge of them to disposal system.
EFFECT: improved quality of separation of steaming products.
3 cl, 1 dwg
FIELD: petroleum refining industry; petroleum residue coking retarding method.
SUBSTANCE: the invention is pertaining to the field of petroleum refining industry and is aimed at improvement of operation of installation of petroleum residue coking retarding. The method includes a preliminary heating of the original crude, its mixture with a recirculator - a heavy gas-oil of a coking with production of a secondary raw material and heating it up to the temperature of coking in the reactor with formation of a coke and distillate products of coking and preparation of the reactor. In case of failure of one of the reactors the thermal formation of the secondary raw material is cooled and is directed for separation into the rectifying tower, while in the operating reactor they conduct preparation and the following cycle of a coking is exercised in the same reactor. The invention allows by recovery of the process of coking to raise its efficiency.
EFFECT: the invention allows upgrade the coking process efficiency.
2 cl, 1 dwg, 1 tbl
FIELD: petroleum processing.
SUBSTANCE: invention relates to technology of processing heavy petroleum residues, in particular to coking process, which can be used in delayed coking plants. Processing of sulfur-containing raw material in delayed coking plants comprises preheating raw material and treating it with supplied hydrogen, said raw material being heavy petroleum residues or petrochemical by-products. Coking process is carried out in one step in presence of hydrogen supplied in quality 10 to 200 m3 per 1 m3 raw material.
EFFECT: increased yield of liquid products, reduced sulfur level in products, and reduced material and power consumption.
2 cl, 2 tbl
FIELD: oil refining processes; warming-up retarded coking reactors.
SUBSTANCE: proposed method of warming-up empty reactor includes delivery of primary cooling product removed from reactor being cooled at initial stage of cooling the coke with water followed by delivery of distillate vapor from operating reactor. Then, hydrocarbon condensate is discharged to warming-up reservoir and vapor phase from this reservoir is discharged to purse reservoir or to rectifying column. Liquid phase is pumped-out to substandard petroleum product line. It is good practice to perform initial stage of cooling the coke with water for 1-2 h. Vapor flow from reactor being cooled is fed in the downward direction to reactor to be warmed-up.
EFFECT: reduced power requirements due to avoidance of use of water vapor; reduced toxic effluents.
3 cl, 2 ex
FIELD: petroleum processing and petrochemistry.
SUBSTANCE: process comprises: heating petroleum feedstock; coking it in coking chamber while simultaneously withdrawing vapor-gas products and separating them on rectification column; cooling and separating resulting gas-liquid mixture into gas, gasoline, and water; draining water condensate; mixing gasoline with gas followed by separating them; and performing processing to produce coking gas and coking gasoline. Mixing of gas and gasoline is conducted in gas-liquid contactor by tangentially feeding stream of compressed gas preliminarily purified of liquid drop phase into injector-atomized gasoline. Gasoline-atomization injector is constructed in the form of perforated tube provided with bumper disk and mounted along axis of gas-liquid contactor.
EFFECT: increased yield of coking gasoline and improved quality of coking gasoline.
2 dwg, 3 tbl
FIELD: oil-processing industry; methods of trapping of ejections of foul gases from rectors of a carbonization.
SUBSTANCE: the invention is pertaining to the field of the oil-processing industry and may be used at trapping the harmful gases ejections from the reactors of carbonization. The method provides for the preliminary separation of the products of the heating-up of the reactors, the coke steaming and cooling in the additional rectifying column with extraction of the intermediate fractions guided into the basic rectifying column, the water condensate and the gas. At that for separation into the additional rectifying column they feed the products of the heating-up with the flow temperature below 240°С and the products of the steaming and cooling with the flow temperature of 150-240°С, and as the intermediate fractions gate out the low quality fractions at -180°С, 110-180°С and +180°С. The products with the flow temperature of above 240°С may be guided directly to the basic rectifying column, and the products with the flow temperature below 150°С - in the separator. It is preferable to conduct separation in the separator at the temperature of 80-140°С and duration of 1-3 hours. The method allows to raise the quality of separations of the trapped harmful ejections, in particular, to reduce the share of petroleum in the water condensate and to decrease the petroleum products losses and to increase efficiency of the process of trapping, as well as improve the ecological indexes of the process of the retard carbonization.
EFFECT: the invention ensures the improved quality of separation of the trapped harmful ejections, reduction of the share of petroleum in the water condensate, the decrease of the petroleum products losses, the increased efficiency of the process of trapping, the improved ecological indexes of the process of the retard carbonization.
8 cl, 1 ex, 1 tbl, 1 dwg
FIELD: petroleum processing.
SUBSTANCE: invention aims at simultaneously producing petroleum coke with low and high contents of volatiles, which coke, after calcination, can be used to manufacture anodes or graphitized products. Process of producing petroleum coke through retarded coking of petroleum residues comprises supplying feedstock to coke chamber at 475-485°C, coking during 14 to 36 h, discharging resulting coke by drilling central well in the coke bulk and cutting coke of the top part of chamber until it is completely emptied at a depth 4-5 m, discharged coke is removed from under the chamber and after that cutting of coke is continued in the lower part of chamber until it is also completely emptied. Thereafter, coke discharged from the top part of chamber and coke discharged from the lower part of chamber are stored separately. The former contains at least 15% volatiles and is used as substitute of sintering and thinning components in coal coking charge in blast furnace coke production and the latter contains no more than 11% volatiles.
EFFECT: enabled simultaneous production of volatiles-rich and low-volatile cokes.
FIELD: .oil industry
SUBSTANCE: method comprises preliminary heating of initial raw material, mixing it with the carbonization gas oil, supplying the mixture to the intermediate tank, heating the raw material up to the temperature of carbonization, and carbonizing it in the carbonization chamber to produce carbon and carbonization distiller. The distiller is supplied to the bottom section of the rectification tower in which it is separated into gas, gasoline, and light and cubic carbonization gas oils. The other heated hydrocarbon raw material is additionally supplied to the bottom section of the rectification tower. The concentration of sulfur in the material is higher than that in the initial raw material . The cubic gas from the rectification tower is carbonized by a known method to produce coke and distiller which is supplied to the bottom section of the rectification tower. The initial raw material can be mixed with the light or heavy carbonization gas oil.
EFFECT: simplified method.
2 cl, 2 tbl, 7 ex
FIELD: petroleum processing.
SUBSTANCE: invention relates to apparatuses for isolation of hydrocarbon fractions of liquid fuel and coke from straight-run goudron and acid sludges, aged mazuts, oil slimes, and can be used to utilize indicated wastes. Reactor for isolation of hydrocarbon fractions of liquid fuel and coke from subquality coking products and petroleum processing wastes comprises upright cylindrical body 1 with plane bottom 2 provided with external heater 3 having central opening 21 with connecting pipe 22; feedstock receiver 5 secured to drive shaft 4; perforated sparkling tube 6 rigidly connected to feedstock receiver 5; and knife 7 mounted on shaft 4 before sparkling tube in the direction of rotation of shaft 4 and in parallel to bottom 2 and tube 5. Perforations of sparkling tube 6 are made in the form of through grooves 11 along cylindrical surface of tube 6 and are positioned over plane gutter 12. Sparkling tube 6 bears rod 13 for longitudinal displacement. Rod 13 supports scrappers 16. Body 1 accommodates direct (9) and back (10) pushers of rod 13. Feedstock receiver 5 and sparkling tube 6 are provided with screens 24 and 25. Cutting edge of knife 7 is made in the form of equal-sided corner prominences. Hub 19 with radial inclined blades 20 is attached to lower part of shaft 4 and connecting pipe 22 is provided with radial counterblades.
EFFECT: prolonged duration of continuous operation of reactor and increased productivity.
FIELD: petroleum processing.
SUBSTANCE: method according to invention determines pressure gradients at exit and entrance in each section of the furnace and real gradient is compared to projected gradient, after which, depending on disagreement value, this value is diminished via variation of fuel consumption in corresponding furnace burner. Projected gradient is calculated using formula: ΔPi=k(L1+b)n, wherein ΔPi is pressure gradient in i-th section of coil, %; k, b, n are coefficients depending on conversion value, nature of raw material, and projected quality of final thermal destruction products; and L1 reduced length of coil from its beginning to i-th measurement point, %.
EFFECT: decreased coking of furnace coil and increased operation cycle of plant, which incorporates the furnace.
3 cl, 3 tbl