Built-in cold wall type shift reactor for heat exchanger and direction connection structure for shift reactor and downstream heat exchanging equipment

A technology for heat exchange equipment and reactors, applied in chemical instruments and methods, hydrogen separation, separation of hydrogen using solid contact, etc., can solve the problems of leakage source, pipeline material manufacturing, high inspection cost, large investment amount, etc. External piping, complete adiabatic reaction, and the effect of improving safety

Active Publication Date: 2012-10-17
SHANGHAI INT ENG CONSULTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Because the carbon monoxide shift reaction is carried out at relatively high pressure and temperature, the outlet temperature of the shift reactor R101 is between 400 and 500°C, and the main component of the process medium is H 2 , CO, CO 2 and water vapor, the medium hydrogen partial pressure is high, flammable and explosive; in addition, due to the high-temperature and special medium corrosion environment of the process medium, the material of the old shift reactor shell is generally made of medium-temperature hydrogen-resistant steel lined with stainless steel, and the gas-gas heat exchanger tube The process uses medium-temperature hydrogen-resistant steel lined with stainless steel, and the pipeline material is stainless steel; the cost of materials, manufacturing, inspection, and maintenance are very high
[0006] In addition, in the traditional process based on the connection of old-style shift reactors and old-style equipment, the old-style equipment is connected by pipelines. These pipelines and connected equipment not only occupy a large space for layout and piping, but also because of The pipe carries high pressure, high temperature, large diameter, and correspondingly thick pipe wall
At the same time, the layout of the pipeline and the elimination of the thrust of the pipeline require the use of a large number of elbow pipe fittings, which increases the number of girth welds. These reasons will result in high costs for pipeline materials, manufacturing, and inspection, and a large amount of investment. Corrosion in high-temperature special media environment, creating a large number of potential leak sources and failure points

Method used

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  • Built-in cold wall type shift reactor for heat exchanger and direction connection structure for shift reactor and downstream heat exchanging equipment
  • Built-in cold wall type shift reactor for heat exchanger and direction connection structure for shift reactor and downstream heat exchanging equipment
  • Built-in cold wall type shift reactor for heat exchanger and direction connection structure for shift reactor and downstream heat exchanging equipment

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Experimental program
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Effect test

Embodiment 1

[0052] see image 3 , the cold-wall shift reactor with a built-in heat exchanger shown in the figure is an axial radial reactor, including a pressure-bearing shell 100, which is welded by a cylinder section and upper and lower heads The cylinder section and the upper and lower heads are all made of medium-temperature hydrogen-resistant steel, and there is no need to use stainless steel lining in the pressure shell 100 . The entire pressure-bearing housing 100 is installed on a foundation using a support 110 (not shown in the figure). On the top of the pressure housing 100 , that is, on the top of the upper head, a manhole 120 and a starting heating gas inlet 130 are arranged. The purpose of setting the manhole 120 is to facilitate the disassembly and assembly of the heat exchange component 200 and the outlet central pipe 300 . A manhole cover 121 is installed on the manhole 120 , and a pressure gauge P is installed on the manhole cover 121 to detect the reaction pressure in t...

Embodiment 2

[0061] see Figure 4 , the cold-wall shift reactor with built-in heat exchanger in this embodiment is an axial reactor, and its structure is based on the same principle as that of Embodiment 1, the only difference is that the position of the feed gas inlet 150 of the shift reactor is different, and the feed gas is in the The direction of flow in the tubes is reversed. This embodiment is not only another structural form of the axial-to-radial conversion reactor, but also due to the inversion of the feed gas flow direction, when the reactor adopts an axially reversed structure, the cold wall between the pressure-bearing shell and the catalyst outer frame The channel structure is realized.

[0062] The cold-wall shift reactor with a built-in heat exchanger includes a pressure-bearing shell 100. The pressure-bearing shell 100 is welded by a cylinder section and upper and lower heads, and the cylinder section and the upper and lower heads are all made of Made of medium-temperatur...

Embodiment 3

[0074] see Figure 5 , the cold-wall shift reactor with built-in heat exchanger of this embodiment is an axial radial reactor, and its structure is basically the same as that of Embodiment 2, the only difference being that: a radial gas dispersion is arranged on the catalyst outer frame 410 The hole 411 makes the catalyst outer frame 410 double as a gas distributor.

[0075] The working principle of this embodiment is: the low-temperature feed gas enters the feed gas guide tube 220 of the heat exchange component 200 from the feed gas inlet pipe 150a of the shift reactor, and enters the column of the heat exchange component 200 through the feed gas guide tube 220 In the tube, it exchanges heat with a part of the heat-shifted gas from the catalyst bed 400. After the heat-exchanged raw material gas reaches the activation reaction temperature of the catalyst, it enters the lower space of the pressure shell 100 through the tubes, and then passes through the reactor. The row holes ...

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Abstract

The invention discloses a built-in cold wall type shift reactor for a heat exchanger. In the invention, a heat exchanging component and an outlet center pipe are arranged in a pressure-bearing shell; low-temperature feed gas exchanges heat with reacted heat shift gas through the heat exchanging component, and then enters into a catalyst bed layer for an adiabatic transformation reaction, and the adiabaticly reacted heat shift gas is sent out through the outlet center pipe. The invention changes a gas-gas heat exchanger in a traditional process flow into an inner component of a reactor, reduces one pressure-bearing equipment shell according to the design by pressure difference, lowers the design temperature and the wall thickness of a reactor shell, improves the safety and the reliability of reactor operation, decreases external connection pipelines and occupation space, and eliminates many leakage sources and fail points. The invention also discloses a direct connection structure for the heat exchange between the shift reactor and the downstream equipment, wherein the shift reactor is arranged vertically, the downstream equipment is arranged horizontally, the shift reactor is directly connected with the downstream equipment through a connection pipe and flanges, and one connection pipeline and the occupation space are saved, thereby improving the safety of system devices.

Description

technical field [0001] The invention relates to the technical field of a shift reactor and the connection between the shift reactor and downstream heat exchange equipment, in particular to a cold-walled shift reactor with a built-in heat exchanger and a direct connection structure between the shift reactor and downstream heat exchange equipment. In the present invention, the gas-gas heat exchanger downstream of the old-type shift reactor in the traditional process is placed in the interior of the reactor as a whole, and becomes an internal part of the reactor to achieve structural and functional innovations. The present invention is suitable for carbon monoxide shift reactors. Also suitable for methanation reactors. Background technique [0002] see figure 1 , the existing axial shift reactor includes a pressure housing 10, the pressure housing 10 is installed on the foundation through a support 20 (not shown in the figure), and the catalyst bed 30 is arranged in the pressu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/02C01B3/58
Inventor 杨震东杨朝阳陆欢庆刘磊金力强李智勇康啸琦
Owner SHANGHAI INT ENG CONSULTING
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