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Method for producing high quality needle-type coke by improving coking process

A technology of needle coke and process, which is applied in the field of coking and chemical industry, can solve the problems affecting the quality of needle coke products, the increase of impurities in coking raw materials, and tower stringing, etc., and achieve the effects of preventing tower channeling, ensuring quality, and ensuring product quality

Inactive Publication Date: 2009-01-21
戴惠筠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the general coking process is adopted, due to the unreasonable process, the impurities in the coking raw materials will increase, which will affect the quality of the needle coke product, and it will also easily produce phenomena such as tower stringing

Method used

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  • Method for producing high quality needle-type coke by improving coking process
  • Method for producing high quality needle-type coke by improving coking process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] As shown in Figure 1, the coal-based or oil-based high-purity concentrates (QI value<0.1% by weight) obtained by various pretreatment methods are used as coking raw materials, and are controlled according to the amount of oil and steam generated by the self-control flow meter 13 The variable operating curve is used to feed the feed, and mix it with the circulating oil in the mixer 3A, and the mixed oil is pumped into the purified oil-mixed oil heat exchanger 6 through the pump 11, and after heat exchange with the purified oil, it is sent to the coking tower through the heater 1 2. At the beginning, feed with the set upper limit, variable operation, and feed with the set lower limit 6-8 hours before the stop, and keep stable until the feed is stopped, ensuring that the amount of oil vapor generated cannot be reduced later. Reach the peak value, avoiding the channeling of the tower. The top pressure of the coking tower 2 is 0-0.3mpa, the circulation ratio is 0.5-2.5, and t...

Embodiment 2

[0021] As shown in accompanying drawing 2, whole technological process is identical with embodiment 1, just adds a purification tower 3B between tower filter 5 and fractionation tower 4, removes mixer 3A, and fractionation tower 4 top still is fractionating section, bottom Change to mixed segment. The oil vapor coming out of the coking tower 2 passes through the self-control flow meter 13 and the tower filter 5, and then goes to the purification tower 3B for purification, and then goes to the upper fractionation section of the fractionation tower 4 for fractionation. The coking raw material is mixed with the purified circulating oil in the lower mixing section of fractionation tower 4 . Its operation process and principle are the same as in Embodiment 1, except that the positions of oil vapor purification and raw material mixing with circulating oil are different.

[0022] According to the operating conditions and process of Example 1, the soft bituminous coal series raw mate...

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Abstract

The invention relates the method of improving carbonization technology and producting needle coke, comprising the following characters: using the coal system or oil system as raw materials to prepare high-purity material as coking raw material; firstly adding the coking material, then adding light oil, finally adding light oil; after removing the waste hot vapor, cleaning the oil and gas with decontamination plant and then fractionating them. The method makes the circulating oil reach high purity.

Description

technical field [0001] The invention relates to a coking chemical technology, in particular to a method for producing needle coke by improving the coking process. Background technique [0002] There are many methods for producing coal-based or oil-based needle coke, most of which include raw material pretreatment and coking treatment. For example, the ZL86100675 patented technology adopts the distillation reforming method without adding solvent, the process is relatively simple, the raw material is wide, and a variety of co-products can be obtained. The quality of the needle coke product has also been improved, but it is only a secondary product (only It is used as high-power electrode raw material); ZL98114371.7 patented technology is much more advanced than ZL86100675 patented technology, many improvements have been made to the raw material pretreatment, and the innovation of "two-stage operation" has also been made in the coking process, which greatly improves the product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/00C10B57/16
Inventor 戴惠筠
Owner 戴惠筠