Slurry bed reactor and reaction system for selective hydrogenation of acetylene to ethylene

A slurry bed and reactor technology, which is applied in the fields of hydrogenation to hydrocarbon production, chemical instruments and methods, organic chemistry, etc., can solve the problems of partial temperature flying of the reaction bed and easy deactivation of catalysts, and achieves lower temperature and enhanced turbulence. The effect of mass transfer with gas-liquid and diameter reduction

Active Publication Date: 2016-10-12
北京锦泰诚瑞科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Catalyst is easy to deactivate, and the local overheating of the reaction bed is a common problem in the prior art

Method used

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  • Slurry bed reactor and reaction system for selective hydrogenation of acetylene to ethylene
  • Slurry bed reactor and reaction system for selective hydrogenation of acetylene to ethylene
  • Slurry bed reactor and reaction system for selective hydrogenation of acetylene to ethylene

Examples

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Effect test

Embodiment 1

[0042] See figure 1 , a slurry bed reactor for selective hydrogenation of acetylene to ethylene, comprising a slurry bed reactor cylinder 23, surrounded by a jacket 1 outside the cylinder, the jacket is annular, and a heating medium is passed into the jacket, The slurry bed reactor is heated. A gas inlet 3 is provided at the bottom of the slurry bed reactor, and a gas outlet 10 is provided at the top;

[0043] The bottom of the slurry bed reactor is provided with a gas distributor ( figure 2 ), connected with the gas inlet 3; the gas distributor includes three concentric annular gas distribution pipes 24 on the same horizontal plane, the distance between the centers of adjacent concentric circles is 70mm, and the diameter of the annular gas distribution pipes is 50mm. The bottom of the annular gas distribution pipe 24 has a hole with a diameter of 3mm, and the total opening rate on the annular gas distribution pipe is 12%; The central air pipe 25 perpendicular to the plane...

Embodiment 2

[0047] A slurry bed reactor for selective hydrogenation of acetylene to produce ethylene, comprising a reactor shell, the shell is surrounded by a jacket, the jacket is ring-shaped, and a heating medium is passed into the jacket, for the slurry bed reactor for heating. There is a gas inlet at the bottom of the slurry bed reactor and a gas outlet at the top;

[0048] A gas distributor is provided below the slurry bed reactor, which is connected to the gas inlet; the gas distributor includes 5 concentric annular gas distribution pipes on the same horizontal plane, with holes at the bottom of the annular gas distribution pipes, the diameter of which is 5 mm, and the diameter of the annular gas distribution pipes The total opening ratio is 10%, the distance between the centers of adjacent annular gas distribution pipes is 60mm, and the diameter of the annular gas distribution pipes is 50mm. The annular gas distribution pipe is in communication with the gas distributor connecting ...

Embodiment 3

[0053] The acetylene selective hydrogenation ethylene system ( figure 1 ): comprising a slurry bed reactor, a regeneration tower 12, and a slurry storage tank 17;

[0054] The slurry outlet 2 at the lower part of the cylinder of the slurry bed reactor is connected to the catalyst filter 11. The catalyst filter is two cluster-type automatic filters connected in parallel, with a filtration accuracy of 0.5 μm. The two cluster-type automatic filters are used alternately and regeneration.

[0055] The catalyst filter 11 is connected to the regeneration tower 12; a heater is arranged in the regeneration tower. The heater vaporizes the liquid phase solvent in the slurry bed, and the green oil in the liquid phase is deposited at the bottom of the regeneration tower and discharged.

[0056] A tower top condenser 16 is arranged on the top of the regeneration tower, and the condensate outlet of the tower top condenser 16 is connected to the liquid phase solvent inlet 21 of the slurry s...

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Abstract

The invention belongs to the field of chemical engineering and provides a slurry bed reactor for producing ethylene by using acetylene selective hydrogenation. A gas distributor is arranged below the slurry bed reactor and is connected with a gas inlet; multiple groups of finger tubes are arranged above the gas distributor and are perpendicular to the horizontal surface; each group of finger tubes comprises multiple heat exchange tubes of which the tops are connected with one another, and the spacing between every two heat exchange tubes is equal; a gas-liquid separator is arranged below the gas outlet of the slurry bed reactor; and a condenser is arranged below the gas-liquid separator. The invention also provides a system by applying the slurry bed reactor. According to the equipment provided by the invention, the problems that the production amount of green oil is large, the cycle period of catalysts is short and temperature runaway of the reactor is easily caused in the fixed bed reactor in the ethylene production reaction based on acetylene selective hydrogenation are well solved, and the problems that loss of catalysts and difficulty in dust removal are caused due to violent collisions among the catalyst particles and that the heat exchange mechanism and the reactor are severely worn due to abrasive actions of solid particles are also solved.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a slurry bed reactor and a system using the slurry bed reactor. Background technique [0002] Low-concentration acetylene gas solid-phase catalytic hydrogenation technology has been very mature in the petroleum industry. It is mainly used to remove acetylene impurities from ethylene. However, due to the high activity of acetylene, the heat of hydrogenation reaction is large. Even if there is a small amount of acetylene in the cracked gas, the traditional method The gas-solid phase fixed-bed hydrogenation reactor still has serious problems such as large amount of green oil production, short catalyst cycle, and easy "overheating" of the reactor. Therefore, the traditional gas-solid phase fixed-bed catalytic hydrogenation process is not suitable for high-concentration acetylene selective hydrogenation to ethylene; the slurry bed reactor has a simple structure, is easy to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/22C07C11/04C07C5/09
Inventor 史雪君车中山余海鹏吴道洪
Owner 北京锦泰诚瑞科技发展有限公司
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