SU1447835A1 - Method of producing coke from oil residues - Google Patents

Abstract

The invention relates to a method for producing coke from petroleum residues and improves the productivity of the process by increasing the coking behavior of the feedstock. The raw material is preheated, incubated for 3-30 minutes with the separation of the fraction boiling away to 400 ° C, the residue thus obtained is heated to the coking temperature and coked with the separation of hydrocarbon vapors. 1 pc., 3 tab.

Description

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The invention relates to a process for the production of coke and can be used in the oil refining industry.

The aim of the invention is to increase the productivity of the process by increasing the coking ability of the feedstock.

The drawing shows a diagram of a plant for producing coke from oil residues.

The plant comprises tube furnaces 1 and 2 connected to a separator 3 and coking reactors 4-7. The top of the coking reactor is connected to a distillation column 8 connected to a separator 3 and a heat exchanger 9, which is connected to a tube furnace 1,

The method is carried out as follows.

The feedstock is heated in a convection chamber of the furnaces 1 and 2 to 350-380 ° C and fed to the separator 3. From the bottom of the separator 3, the feed stream is sent to the furnace 2 for heat treatment at 480-500 ° C and then to one of the coking reactors 4, 5,6,7 (in reactor 4

according to the scheme) for determining the vapor part with the end of boiling up to 400 ° C and ... holding the residue. The upgraded product is withdrawn from the bottom of the reactor 4. To create high heat transfer rates and reduce charge. The coke ovens of the furnace add gas-gas fractions coming through the cooler to the stream, and the turbulizer adds water vapor. The secondary raw material obtained after mixing is sent through the furnace 1e, where it is heated to 475-510 ° C, to the reactor 6 for coking. The heat treatment products, lumps and cokings are combined and sent to distillation column 8 for separation. Coke is discharged from the reactor.

In order to ensure the rectification process in column 8, an appropriate product to be cooled is fed into the apparatus. Gas, gas, steam, gasoline fractions are taken from the top of the column, light gas oil is withdrawn from the side, heavy gas oil (fr, 350-400 ° C) is extracted from the accumulator, and gas oil from the bottom is fr.

A method of producing coke from petroleum residues, including preheating the feedstock to the cracking temperature, heating the residue to the coking temperature, coking to liberate hydrocarbon vapors, characterized in that,

400-500 Q, The excess amount of qu-5 3-30 min with the separation of the fraction, the stripped residue is removed from the setting fraction up to 400 ° C,

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ki Coking reactors 5-7 and shutter speeds 4 are interchangeable and have identical piping. Therefore, when coking the walls of the reactor 4, it becomes coking, and the shutter speed is held in any of the free reactors 5-7.

Example, In a laboratory setup, coking is carried out using the presumed method of sulphurous tar oil. In one case, the feedstock is heated to and held for 3.15.30 minutes, in the other - heated to 480 ° C and kept in the reaction zone for 3.15J30 minutes. The actual coking is carried out at 480 ° C, the preparation time of the chamber is 24 hours, the volume loading of the chamber is a constant value.

For each holding time, the coking behavior of the aged residue, the filling time of the reactor, the operating cycle and the increase in the capacity of the installation are determined.

Table 1 shows the properties of the feedstock and intermediate products for an example with the temperature of the feedstock and the time

ki 30 min, in table. 2 shows the flow rates for the same example, in Table 3; the indicators for the process of producing petroleum coke for all the examples.

Compared with the known method, the offer allows an increase in the coking ability of the raw material by 1.4-4.5 times, which reduces the filling time of the reactor by 2.8 times and increases the productivity of the installation by 8.8-31%,

The yield of coke in the known method is 25%, in the proposed method - 28%.

Claims (1)

Invention Formula A method of producing coke from petroleum residues, including preheating the feedstock to the cracking temperature, heating the residue to the coking temperature, coking to liberate hydrocarbon vapors, characterized in that, 3-30 minutes with the separation of the fraction, vyki3-30 minutes with the department up to 400 C, Table 1 Density 97560,9747 1.1873 1.1852 Coking ability, wt.% 7,87,63534,2 Sulfur content,% 2,592,54 2,71 2,68 Bogdanov distillation, vol.% Flow The original raw material - tar Heat treatment furnace loading Residue from the bottom of the column 76.9 Residue from the bottom of the reactorCopper furnace loading Risichiko-gasoil Recycling Rate: heat treatment furnaces Table 2 Flow rate, t / h, according to the method the famous proposed 76.9 76.9 00 23.1 193 193 76.9 100 23.1 2.5 2.5 7 (known) 380 Continuation of table 2 22.5 45.5 Coke e 3UMo6t L) ac14i.i. MbtufTpodyK / lesfftul D. eazaiAb Ol kda- MbfU. / uyduk / l The same / s - essass