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Two-stage hydrogenation system, and hydrogenation method

A hydrogenation system and two-stage hydrogenation technology, applied in hydrotreating process, petroleum industry, processing hydrocarbon oil, etc., can solve the problems of complex operation, high investment, high energy consumption, improve volume fraction and prolong operation Period, low concentration effect

Active Publication Date: 2015-07-15
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of high investment, large land occupation, high energy consumption and complicated operation of the traditional trickle bed two-stage hydrogenation technology in the prior art, the present invention provides a two-stage hydrogenation system and hydrogenation method

Method used

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  • Two-stage hydrogenation system, and hydrogenation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] like figure 1 Shown, a two-stage hydrogenation system.

[0058] Including: one-stage hydrogenation reaction zone 4 and second-stage hydrogenation reaction zone 7;

[0059] The two-stage hydrogenation reaction zone is placed in the same reactor shell, the first-stage hydrogenation reaction zone 4 is on the bottom, the second-stage hydrogenation reaction zone 7 is on the top, and a ring section is arranged between the first-stage reaction zone 4 and the second-stage reaction zone 7 Partition 6;

[0060] The bottom of the reactor is provided with a reaction raw material inlet, and the top of the reactor is provided with a gas phase product outlet;

[0061] The upper center of the reactor is provided with a manhole 8, and the manhole 8, the partition plate 6 and the inner wall of the reactor form an annular space with the bottom closed and the top open, and the second-stage hydrogenation reaction zone 7 is arranged in the annular space; the second-stage hydrogenation A s...

Embodiment 2

[0076] The system is the same as in Example 1, the only difference being that a catalyst bed is set in the second-stage hydrogenation reaction zone;

[0077] Specific process conditions:

[0078] The raw material oil used is blended diesel oil, with a total sulfur content of 0.9% in terms of weight percentage, of which straight-run diesel oil accounts for 85%, and catalytic cracking diesel oil accounts for 15%;

[0079] The hydrogen is reformed hydrogen, and the volume composition is, V%: H2 92 / C1 2.46 / C22.62 / C3 1.97 / iC40.30 / nC40.57 / C5+0.08; where, C1~C5 refer to carbon 1 to carbon 5 alkanes;

[0080] Two catalyst beds are set in the first-stage hydrogenation reaction zone; the weight ratio of cycle oil to raw oil is 0.5:1;

[0081] The operating conditions at the inlet of the first-stage hydrogenation reaction zone are: pressure 9.0MPa, temperature 350°C, raw material liquid hourly space velocity 2.5hr -1 ;

[0082] A catalyst bed is set in the second-stage hydrogenation ...

Embodiment 3

[0086] System is the same as embodiment 2;

[0087] Specific process conditions:

[0088] The raw material oil used is blended diesel oil, with a total sulfur content of 0.9% in terms of weight percentage, of which straight-run diesel oil accounts for 85%, and catalytic cracking diesel oil accounts for 15%;

[0089] The hydrogen is reformed hydrogen, and the volume composition is, V%: H2 92 / C12.46 / C22.62 / C31.97 / iC40.30 / nC40.57 / C5+0.08; where, C1~C5 refer to carbon 1 to carbon five alkanes;

[0090] Two catalyst beds are set in the first-stage hydrogenation reaction zone; the weight ratio of cycle oil to raw oil is 4.0:1;

[0091] The operating conditions at the inlet of the first-stage hydrogenation reaction zone are: pressure 9.0MPa, temperature 350°C, raw material liquid hourly space velocity 2.5hr -1 ;

[0092] A catalyst bed is set in the second-stage hydrogenation reaction zone; the operating conditions of the second-stage hydrogenation reaction zone are: pressure 8.9...

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Abstract

The invention discloses a two-stage hydrogenation system, and a hydrogenation method. The two-stage hydrogenation system comprises a first-stage hydrogenation reaction zone, and a second-stage hydrogenation reaction zone; the two hydrogenation reaction zones are arranged in a same reactor housing, the first-stage hydrogenation reaction zone is arranged below the second-stage hydrogenation reaction zone, and an annular splitter plate is arranged between the first-stage hydrogenation reaction zone and the second-stage hydrogenation reaction zone; in the reactor, the middle of the upper part is provided with an inlet; an annular space is formed by the inlet, the annular splitter and the inner wall of the reactor, wherein the bottom of the annular space is sealed and the top of the annular space is provided with an opening; and the second-stage hydrogenation reaction zone is arranged in the annular space. The hydrogenation method comprises following steps: raw oil and hydrogen are mixed, and are delivered into the first-stage hydrogenation reaction zone for primary refining reaction; and then a first-stage hydrogenation liquid phase reaction product is subjected to advanced refining reaction in the second-stage hydrogenation reaction zone. The two-stage hydrogenation system and the hydrogenation method are capable of reducing equipment investment and energy consumption, and reducing complex degree of equipment operation; inhibition effect of high impurity side product concentration on advanced hydrogenation reaction is avoided; and production of high quality petroleum products under relatively high liquid hourly space velocity is realized.

Description

technical field [0001] The invention relates to the field of hydrogenation in petrochemical industry, and more specifically, relates to a two-stage hydrogenation system and a hydrogenation method. Background technique [0002] With the increasingly stringent environmental protection regulations and the increase in the proportion of processed low-quality crude oil, hydrogenation units have become important production units for domestic oil refineries due to their ability to produce clean fuels. At present, trickle bed technology is mature and reliable, and is widely used in hydrogenation units in refineries. The trickle bed hydrogenation process needs to maintain a high hydrogen-to-oil volume ratio. The feed oil and hydrogen enter from the top of the reactor, and the feed oil dispersed by a large amount of hydrogen flows through the catalyst bed in the form of droplets, and a series of events occur. Hydrogenation reaction, the final reaction product flows out from the bottom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/02
Inventor 刘凯祥王鹤刘家明孙丽丽李浩
Owner CHINA PETROCHEMICAL CORP
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