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A kind of coking system and coking method

一种焦化蜡油、焦化装置的技术，应用在生产针状焦的焦化系统,焦化系统领域，能够解决针状焦产品性能不稳定、没有解决针状焦操作波动等问题，达到降低热膨胀系数、质量提高、满足连续操作的效果

Active Publication Date: 2021-07-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 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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  • A kind of coking system and coking method
  • A kind of coking system and coking method
  • A kind of 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

[0232] 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 includes the 1st to mth heating units and the 1st to nth coke towers, each of the m heating units is respectively connected to the n coke towers, and the n coke towers Each coke tower in the tower is respectively communicated with one or more separation towers, and the one or more separation towers are communicated with the m heating unit and optionally communicated with the i heating unit, the values ​​m, n and i Defined as described in the specification. The coking system can at least use petroleum-based or coal-based raw materials to produce high-quality needle coke with stable performance.

Description

technical field [0001] 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 [0002] 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. [0003] CN200810017110.3 discloses a method for preparing needle coke. The fraction or residual oil rich in aromatics is subjected to a delayed coking treatment with a certain temperature rise program, and then the obtained green coke is calcined to obtain a needle-shaped coke with a high mesophase content. Needle coke with well-developed structure. [000...

Claims

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Application Information

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Patent Type & Authority Patents(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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