A Novel Delayed Coking Method

A delayed coking and coking tower technology, applied in the field of delayed coking technology, can solve the problems of easy coking and clogging of filling pipelines, low use efficiency, etc., and achieve the effects of reducing entrainment, improving use efficiency and reducing costs

A delayed coking and coking tower technology, applied in the field of delayed coking technology, can solve the problems of easy coking and clogging of filling pipelines, low use efficiency, etc., and achieve the effects of reducing entrainment, improving use efficiency and reducing costs

CN104560110BActive Publication Date: 2016-07-27CHINA PETROLEUM & CHEM CORP +1
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The defoamer is prepared from the following raw materials in parts by mass: 10 parts of polyborosiloxane, 20 parts of ethyl cellulose, 10 parts of ultra-high viscosity linear polydimethylsiloxane, iron-based polysilicon 2 parts of azane, 20 parts of cetyl alcohol, 38 parts of coker wax oil. After mixing the above raw materials, stir at 60° C. for 2 hours, and then obtain a defoamer product of the present invention after cooling.

Embodiment 2

[0033] Coking raw materials are imported from the Middle East to reduce slag, and the properties are as follows: Density (20°C) is about 989.76kg / m 3, the sulfur content is 2.62% (m / m), the carbon residue is 23.35% (m / m), and the contents of the four components are 14% saturated hydrocarbons, 36.4% aromatics, 34.6% colloids, and 15% asphaltenes. The processing capacity of the industrial device is 160 tons / hour, the production cycle is 24 hours, the circulation ratio is 0.13, the outlet temperature of the heating furnace is 490°C, the oil and gas outlet temperature at the top of the coke tower is 421°C, and the pressure at the top of the tower is 0.16MPa.

[0034] Adopt the antifoaming agent filling method described in the present invention, adopt the antifoaming agent that embodiment 1 obtains. The specific structure of the selected two-fluid nozzle is as follows: the circular diameter of the center liquid nozzle is 16mm, the diameter of the gas ring pipe is 22mm, and the exit...

Embodiment 3

[0036] Same as Example 1, except that the temperature of the circulating compressed dry gas is 180° C., and the flow rate of the defoamer is 22 L / hour. Starting from the moment when the neutron material level meter first shows that it rises to 10%, inject the defoamer until half an hour after the tower is cut, stop injecting the defoamer. The total filling time of the defoamer in this cycle is about 5.5 hours, the total consumption of the defoamer is about 121L, and the unit consumption in a single cycle is about 26.36ppm. Usually in production, the defoaming time (the time interval between the neutron level meter showing twice before and after rising to 10%) is used as the standard for evaluating the defoamer effect. The defoaming time in this production cycle is 2.6 hours, and the corresponding coking gas , Diesel sampling analysis, silicon content in coked gasoline is about 1.48ppm, no silicon residue was detected in coked diesel.

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PUM

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Abstract

The invention relates to a novel coking method, belonging to the field of petrochemical industry. The coking method disclosed by the invention comprises the step of adding an antifoamer into a coking tower during coking reaction when foam in the coking tower reaches a certain extent, wherein the antifoamer enters the coking tower in a gas phase carrier carrying manner and contains polyborosiloxane, ethyl cellulose, ultrahigh-viscosity linear polydimethyl siloxane, ferriferous polysilazane, higher fatty alcohol and a solvent. According to the coking method disclosed by the invention, the antifoaming efficiency of a delayed-coking tower can be increased, the antifoamer is high in service efficiency and low in consumption, and the phenomenon that an antifoamer filling pipeline is subjected to coking and blocking due to rising oil gas can be inhibited, so that the overall economical efficiency and stability of a delayed coking device can be improved to a certain extent.

Description

technical field [0001] The invention relates to a delayed coking process, in particular to a coking process capable of improving the defoaming efficiency of a delayed coking coke tower and effectively preventing coking of defoamer filling pipelines, belonging to the technical field of petroleum processing. Background technique [0002] In the existing refining process technology, delayed coking is a thermal processing process for treating poor-quality residual oil and converting it into light products and coke by deep cracking. Nowadays, the quality of crude oil is gradually becoming heavy and inferior, and resources are increasingly scarce. In the context of rising oil prices, its important position in the petroleum refining industry has become increasingly prominent. During the operation, after the raw material heated to above 450℃ by the heating furnace enters the coking carbon tower, its pressure is suddenly released, and the thermal cracking and polycondensation reactio...

Claims

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Application Information

Patent Timeline
27 Jul 2016
Publication
CN104560110B
IPC
C10G9/16
CPC
C10G9/16
Inventors
刘纾言; 孙鹏