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Low-pressure-drop Z-type radial centrifugal flow fixed bed reactor

A technology of fixed bed reactor and radial centrifugation, which is applied in the direction of chemical instruments and methods, chemical/physical processes, etc., to achieve the effects of reducing perforation speed, pressure drop, and high net ammonia content in outlet gas

Active Publication Date: 2020-03-10
PETROCHINA CO LTD
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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 low pressure drop in ammonia synthesis process of ruthenium-based catalyst, catalyst anti-scouring, and broken catalyst can be separated, the present invention provides a Z-type radial centrifugal flow fixed-bed reactor with low pressure drop

Method used

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  • Low-pressure-drop Z-type radial centrifugal flow fixed bed reactor
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  • Low-pressure-drop Z-type radial centrifugal flow fixed bed reactor

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Effect test

Embodiment 1

[0060] Taking three existing axial reactor processes loaded with iron-based catalysts as an example, fresh normal temperature and low pressure synthesis gas H 2 / N 2 The ratio is 3.00, the air intake is 5100kmol / h, calculated according to the KBR three-tower process, the synthesis gas enters the first iron-based catalyst reactor with a pressure of 150atm and a temperature of 350°C, and the synthesis gas enters the second and third iron-based catalysts The temperature of the reactor is 380°C, the vent ratio of the recycle gas is 4%, and the catalyst loading capacity of the first iron-based catalyst reactor is 15m 3 , the catalyst loading capacity of the second iron-based catalyst reactor is 25m 3 , the catalyst loading capacity of the third iron-based catalyst reactor is 40m 3 , the final export ammonia concentration is 20.92%, and the production index is shown in Table 1.

[0061] Table 1 Reaction pressure 150atm, H 2 / N 2 = 3.0 iron catalyst production index value

[00...

Embodiment 2

[0064] Taking two existing axial reactors loaded with iron-based catalysts in series and one existing axial reactor process loaded with ruthenium-based catalysts as an example, the intake air volume is 5100 kmol / h, fresh normal temperature and low pressure synthesis gas H 2 / N 2 The ratio is 3.00, the pressure of the synthesis gas entering the iron-based catalyst reactor is 150atm, the temperature of the synthesis gas entering the first iron-based catalyst reactor is 350°C, and the temperature of the synthesis gas entering the second iron-based catalyst reactor is 380°C, The reaction temperature entering the third ruthenium-based catalyst reactor is 360°C. The venting ratio of recycle gas is 4%, and the catalyst loading capacity of the first iron-based catalyst reactor is 15m 3 , the filling capacity of the second iron-based catalyst reactor is 40m 3 , the catalyst loading capacity of the third ruthenium-based catalyst reactor is 9m 3 ,, the final export ammonia concentrati...

Embodiment 3

[0068] A Z-type radial centrifugal flow fixed-bed reactor of the present invention packed with a ruthenium-based catalyst is connected in series with two existing axial reactors filled with an iron-based catalyst, as attached figure 1 , 2 The device shown is an example, the intake air volume is 5100kmol / h, and the fresh normal temperature and low pressure syngas H 2 / N 2 The ratio is 3.00, the pressure of the synthesis gas entering the iron-based catalyst reactor is 150atm, the temperature of the synthesis gas entering the first iron-based catalyst reactor is 350°C, and the temperature of the synthesis gas entering the second iron-based catalyst reactor is 380°C, The reaction temperature entering the third ruthenium-based catalyst reactor is 360°C. The venting ratio of recycle gas is 4%, and the catalyst loading capacity of the first iron-based catalyst reactor is 15m 3 , the filling capacity of the second iron-based catalyst reactor is 40m 3 , the catalyst loading capacit...

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Abstract

The invention provides a low-pressure-drop Z-type radial centrifugal flow fixed bed reactor which includes: a cylindrical pressure container, an inner cylinder, an outer cylinder, and a catalyst bed,wherein the inner cylinder, the outer cylinder and the cylindrical pressure container are arranged coaxially. An interlayer is formed between the outer wall surface of the inner cylinder and inner wall surface of the outer cylinder. The catalyst bed is formed by enclosing a lower support seal, the inner cylinder and the outer cylinder; the lower support seal is arranged in the cylindrical pressurecontainer and located on the bottom of same. The inner cylinder is communicated with a gas inlet to form a bypass path of reaction gas. A reaction gas collection flow path is formed between the outerwall surface of the outer cylinder and the inner wall surface of the cylindrical pressure container and is connected to the gas outlet. The bypass path is a diameter-variable flow path. The whole inner cylinder is provided with pores while a part of the outer cylinder is provided with pores. The reaction gas flows from the inner cylinder to the exterior radially via the bypass path and passes through the catalyst bed, then flows into the collection flow path and flows out of the fixed bed reactor through the outer cylinder. In the reactor, the flowing path of the reaction gas is Z-like in shape.

Description

technical field [0001] The present invention relates to low H 2 / N 2 The invention relates to a low-pressure-drop centrifugal Z-type radial centrifugal flow fixed-bed reactor for producing synthetic ammonia with a ruthenium-based catalyst from synthetic gas, and belongs to the technical fields of synthetic ammonia chemical technology and energy recovery and utilization. Background technique [0002] Ammonia synthesis has always played an important role in the world's chemical industry, and about 10% of the world's energy is used for ammonia synthesis. Therefore, catalysts, reactors, and processes for ammonia synthesis have always been a research hotspot and a top priority. At present, the most commonly used ammonia synthesis catalysts in industry are iron-based catalysts. The advantages of iron-based catalysts are easy preparation and low cost, but the disadvantages of iron-based catalysts are also obvious, such as relatively high requirements for reaction temperature and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/02
CPCB01J8/0214B01J8/0278B01J2208/00938
Inventor 李庆勋朱学栋李瑞江杨帆王宗宝肖海成刘克峰娄舒洁王林鲁玉莹史丹彤于天学
Owner PETROCHINA CO LTD
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