Coking system and coking method

A technology of coking and coking wax oil, which is applied in the field of coking and can solve the problems of unresolved needle coke operation fluctuations and unstable performance of needle coke products.

Active Publication Date: 2021-03-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above-mentioned methods all use the conventional one-furnace two-tower delayed coking method to produce needle coke, and none of them solves the problem of large operational fluctuations caused by variable temperature and pressure changes in the production process of needle coke, and the common problem of unstable performance of needle coke products

Method used

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  • Coking system and coking method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0213] The catalytic oil slurry refined by a certain refinery is used as the coking raw material. The specific property analysis of the oil slurry is shown in Table 1. The pressure at the top of the coking tower is 0.5MPa, and the coking cycle of coking is 32h. According to the three-tower switching method provided by the present invention, the steps (1) The outlet temperature of the middle heating furnace 1 is 420°C-440°C heating-constant temperature process, the heating rate is 5°C / h, the constant temperature time is 12h, the gas velocity in the coke tower is controlled at 0.05-0.08m / s, step (2) The outlet temperature of the middle heating furnace 2 is 460°C-490°C heating-constant temperature process, the heating rate is 10°C / h, the constant temperature time is 13h, the gas velocity in the coke tower is controlled at 0.13-0.18m / s, steps (1) to (5 The temperature of the 10% distillation point of the coker wax oil in ) is 350°C, and the temperature of the 90% distillation point...

Embodiment 2

[0231] The same device and needle coke raw material as in Example 1 were used. The supplementary coke pulling raw material is coker wax oil from the separation tower 6 (temporarily stored in the coke pulling raw material storage tank 12), its 10% distillation point temperature is 330°C, 90% distillation point temperature is 480°C, its Rate B is 20%. The coke tower charging period T is 40h, the coke tower top pressure is 0.8MPa, the outlet temperature of heating furnace 2 is 400°C-460°C heating-constant temperature process, the heating rate is 4°C / h, and heating furnace 2 is charging the coke tower. , the gas velocity in the coke tower is controlled to be 0.07-0.10m / s, the outlet temperature of the furnace 14 is 470-510°C, the temperature rise rate is 10°C / h, and the gas velocity in the coke tower of the heating furnace 14 is controlled to be 0.18-0.18- 0.25m / s, coke-pulling raw materials (such as coke wax oil) during the coke charging process of the coke tower, the drawing ra...

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Abstract

The invention relates to a coking system and a corresponding coking method. The coking system comprises first to mth heating units and first to nth coke towers, each of the m heating units communicates with the n coke towers, and each of the n coke towers communicates with one or more separation towers, wherein the one or more separation towers communicate with the mth heating unit and optionallycommunicate with an ith heating unit, and the values m, n and i are defined in the specification. The coking system can at least utilize petroleum or coal series raw materials to produce high-qualityneedle coke with stable performance.

Description

[0001] This application is a divisional application of an invention patent application with the application number 20181135106.3, the application date is November 14, 2018, the priority date is November 14, 2017, and the title is "a coking system and coking method". technical field [0002] The invention relates to a coking system, in particular to a coking system for producing needle coke. The invention also relates to a coking method. Background technique [0003] Needle coke is mainly used to produce high-power and ultra-high-power graphite electrodes. With the development of the steel age, the output of steel scrap has gradually increased, which has promoted the development of electric furnace steel, and will inevitably increase the amount of graphite electrodes, especially high-power and ultra-high-power electrodes, and the demand for needle coke will also continue to increase. [0004] CN200810017110.3 discloses a method for preparing needle coke. The fraction or resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B55/00C10B55/04
CPCC10B55/02C10B57/00C10B55/00C10G9/005C10B57/045C10B53/08C10G9/00C10B55/04C10B57/02C10B1/04
Inventor 初人庆方向晨郭丹宋永一刘继华勾连忠矫德卫武云
Owner CHINA PETROLEUM & CHEM CORP
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