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Low-pressure ammonia synthesis tower and renewable energy low-pressure ammonia synthesis system

A ammonia synthesis tower and ammonia synthesis technology, applied in the direction of energy input, ammonia compound, bulk chemical production, etc., can solve the problems of high operating temperature and pressure, large-scale equipment, complex synthesis route, etc., to achieve sufficient heat exchange and by-product steam The effect of high volume and high energy efficiency

Active Publication Date: 2021-10-01
FUZHOU UNIV ASSET MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problems of high operating temperature and pressure, high energy consumption, complex synthesis route, many equipments and large scale of existing ammonia synthesis reactor and system process, and provide an efficient and compact low-pressure ammonia synthesis tower and renewable energy Low pressure ammonia synthesis system

Method used

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  • Low-pressure ammonia synthesis tower and renewable energy low-pressure ammonia synthesis system
  • Low-pressure ammonia synthesis tower and renewable energy low-pressure ammonia synthesis system
  • Low-pressure ammonia synthesis tower and renewable energy low-pressure ammonia synthesis system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Ammonia tower level:

[0068] The volume ratio of hydrogen to nitrogen at the inlet of the raw material gas into the pipe is 2.5:1, the pressure is 10MPa, and the temperature is 25°C;

[0069] The space velocities of the three first catalyst beds from top to bottom are: 10000h -1 、5000h -1 、5000h -1 ;

[0070] The temperature of the catalyst bed is controlled at 400°C;

[0071] The high-pressure water pressure of the water inlet pipe is 11MPa, and the temperature is 25°C;

[0072] The outlet steam temperature of the steam pipe is 320°C;

[0073] The ammonia concentration at the outlet of the product gas outlet pipe is 20.3%.

[0074] System technology level:

[0075] In the grid-connected mode, the renewable energy is connected to the grid within the capacity allowed by the grid, and the excess power is used to electrolyze water to produce hydrogen. When the renewable energy power is insufficient, the grid power can also be used to meet basic production needs, es...

Embodiment 2

[0081] Ammonia tower level:

[0082] The volume ratio of hydrogen to nitrogen at the inlet of the raw material gas into the pipe is 2.5:1, the pressure is 7MPa, and the temperature is 25°C;

[0083] The space velocities of the three first catalyst beds from top to bottom are: 10000h -1 、5000h -1 、5000h -1 ;

[0084] Second catalyst bed space velocity: 15000h -1 ;

[0085] The temperature of the catalyst bed is controlled at 400°C;

[0086] The high-pressure water pressure of the water inlet pipe is 8MPa, and the temperature is 25°C;

[0087] The outlet steam temperature of the steam pipe is 295°C;

[0088] The ammonia concentration at the outlet of the product gas outlet pipe is 16.5%.

[0089] System technology level:

[0090] The working pressure of the electrolyzed water device is 7.5MPa, and the working temperature is 80°C;

[0091] The volume ratio of raw material gas to hydrogen and nitrogen is 2.4:1, and the ratio of raw material gas to recycle gas is 2:5;

...

Embodiment 3

[0095] Ammonia tower level:

[0096] The volume ratio of hydrogen to nitrogen at the inlet of the raw material gas into the pipe is 2.5:1, the pressure is 5MPa, and the temperature is 25°C;

[0097] The space velocities of the three first catalyst beds from top to bottom are: 10000h -1 、5000h -1 、5000h -1 ;

[0098] Second catalyst bed space velocity: 15000h -1 ;

[0099] The temperature of the catalyst bed is controlled at 450°C;

[0100] The high-pressure water pressure of the water inlet pipe is 8MPa, and the temperature is 25°C;

[0101] The steam temperature at the outlet of the steam pipe is 294°C;

[0102] The ammonia concentration at the outlet of the product gas outlet pipe is 14%.

[0103] System technology level:

[0104] The working pressure of the electrolyzed water device is 5.2MPa, and the working temperature is 80°C;

[0105] The volume ratio of raw material gas to hydrogen and nitrogen is 2.2:1, and the ratio of raw material gas to recycle gas is 1:3...

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Abstract

The invention discloses a low-pressure synthesis ammonia tower and a renewable energy source low-pressure synthesis ammonia system, the synthesis ammonia tower comprises a reactor outer cylinder, a raw material gas inlet pipe and a product gas outlet pipe, a plurality of catalyst frames are sleeved in the reactor outer cylinder, and a first catalyst bed layer is arranged in each catalyst frame; a central pipe is also arranged in the reactor outer cylinder, the central pipe is communicated with one catalyst frame, one-way airflow channels which are sequentially communicated in series are formed among the catalyst frames, and the product gas outlet pipe is communicated with the output gas output end of the last catalyst frame which participates in the synthesis ammonia reaction; a plurality of first heat exchange tube bundles penetrating through all the catalyst frames are arranged in the catalyst frames, one end of each first heat exchange tube bundle is communicated with the high-pressure water inlet tube, and the other end of each first heat exchange tube bundle is communicated with the steam tube. The ammonia synthesis tower disclosed by the invention can be used for efficiently transferring heat, preheating feed gas and producing byproduct steam, can realize accurate temperature control of a bed layer, is beneficial to ammonia synthesis reaction, and has the advantages of energy conservation and consumption reduction, the operation temperature range of the ammonia synthesis tower is 300-450 DEG C, and the pressure range is 0.1-10MPa.

Description

technical field [0001] The invention relates to the technical field of clean energy conversion and storage, in particular to a low-pressure ammonia synthesis tower and a renewable energy low-pressure ammonia synthesis system. Background technique [0002] At present, my country's wind energy, solar energy, hydropower and other renewable energy industries are developing rapidly. However, due to the intermittent and volatile characteristics of these renewable electric energy sources, the renewable electric energy sources do not match the local electricity demand, and it is difficult to integrate them on a large scale. The power grid, in turn, has caused a large amount of renewable energy to be abandoned, and the "three wastes" such as "abandoning wind", "abandoning light" and "abandoning water" are particularly serious. my country's annual "three waste" electricity scale is as high as 100 billion kWh, which is equivalent to the annual power generation of the Three Gorges Power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/04C25B1/04C25B9/65
CPCC01C1/0417C01C1/0411C01C1/0488C25B1/04C25B9/65Y02P20/52
Inventor 江莉龙罗宇林立陈崇启倪军
Owner FUZHOU UNIV ASSET MANAGEMENT CO LTD
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