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Feed gas recovery method and device

A recovery method and recovery device technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of difficult control of the content of flammable and explosive components, and reduce the concentration of flammable and explosive components, process The effect of simple and reliable process and less equipment

Pending Publication Date: 2018-05-22
上海朴力节能环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the flashing pressure, the content of flammable and explosive components such as hydrogen in the rich liquid after flashing is not easy to control

Method used

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  • Feed gas recovery method and device
  • Feed gas recovery method and device
  • Feed gas recovery method and device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 provides a general structural block diagram and a method flow chart of the present invention. Such as figure 1 As shown, a raw material gas recovery device includes an absorption module 1 and a recovery module 2, the absorption module 1 is an absorption tower, the recovery module 2 is a recovery tower, and the mass transfer equipment-recovery tower is preferably a plate tower, a packed tower and other towers The upper part of the absorption module 1 is provided with a lean liquid inlet, and the lean liquid also includes semi-poor liquid. The lean liquid 101 and the raw material gas 102 are fully contacted countercurrently in the absorption tower, and the lean liquid 101 absorbs the raw material gas 102 to obtain the rich liquid 103. The absorption module 1 and the recovery module 2 are connected, and the obtained rich liquid 103 enters the recovery module 2 from the absorption module 1. The rich liquid inlet is located on the upper part of the recovery mod...

Embodiment 2

[0037] Taking synthetic ammonia from coke oven gas as an example, the raw material gas treatment capacity of the decarbonization section is 37400Nm 3 / h (dry basis), the annual operating time is 8000h, the volume concentration of the main components of the raw gas is: 72.8% hydrogen, 24.8% carbon dioxide, 2.0% nitrogen, 0.2% methane, 0.2% carbon monoxide; the pressure is : 2.95MPa(A); temperature: 50°C. The operating pressure of the decarburization absorption tower is 2.9MPa(A), the lean liquid 212 uses 45% MDEA, the semi-lean liquid 213 uses 5% piperazine aqueous solution, the temperature of the semi-lean liquid is 69°C, and the feed rate is 306t / h. The liquid temperature is 55°C, the feed rate is 101t / h, the amount of rich liquid at the bottom of absorption module 1 is 471t / h, and the amount of hydrogen dissolved in the rich liquid is 635Nm 3 / h.

[0038] Such as figure 2 As shown, a raw material gas recovery device includes an absorption module 1 and a recovery module 2...

Embodiment 5

[0053] Such as Figure 7 As shown, a raw material gas recovery device includes an absorption module 1 and a recovery module 2. The absorption module 1 is an absorption tower, and the absorption tower includes an upper decarburization section, a middle section, and a lower desulfurization section. The upper part of the decarburization section is set There are lean liquid inlet and semi-lean liquid inlet, lean liquid 712 and semi-lean liquid 713 respectively enter the decarburization section from the lean liquid inlet and semi-lean liquid inlet; the decarburization section is provided with a middle section cooler 75 and a desulfurization section feed cooler 74; the lower part of the desulfurization section is provided with a raw material gas inlet, and the raw material gas 710 enters the desulfurization section from the raw material gas inlet; the lean liquid 712 and semi-lean liquid 713 entering the absorption module 1 are fully contacted with the raw material gas 710 in counter...

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Abstract

The invention relates to a feed gas recovery method and device, and belongs to the technical field of gas separation engineering. The feed gas recovery method comprises the following steps: step one:lean liquid and feed gas conduct countercurrent contacting in an absorption module to absorb carbon dioxide, and an obtained solution is a rich liquid containing the feed gas; step two: the rich liquid and displacement gas conduct countercurrent contacting in a recovery module to replace the feed gas; Step three: the feed gas is recovered and returned to the absorption module for continuous recycling. The invention also discloses a feed gas recovery device. The feed gas recovery device comprises the absorption module and the recovery module communicating with each other. According to the feedgas recovery method and device, the feed gas in the rich liquid is replaced by the displacement gas under high pressure conditions, and the recovered high-pressure feed gas can be directly returned toan absorption decarburization device of the feed gas or enter subsequent process treatment.

Description

technical field [0001] The invention relates to a raw material gas recovery method and device, belonging to the technical field of gas separation engineering. Background technique [0002] In ammonia synthesis, methanol synthesis, oxo synthesis, hydrogen production, natural gas and other industrial production, it is necessary to remove carbon dioxide from raw gas containing carbon dioxide under high pressure to meet the requirements of subsequent processes. The main beneficial components of raw gas in ammonia synthesis and hydrogen production industry are hydrogen; the main beneficial components of raw gas in methanol synthesis and oxo synthesis industries are hydrogen and carbon monoxide; the main beneficial components of raw gas in natural gas process are methane. At present, the methods for recovering raw gas in industry mainly include: absorption-desorption decarburization method and pressure swing adsorption PSA decarbonization method, among which absorption-desorption ...

Claims

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Application Information

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IPC IPC(8): B01D53/14B01D53/18
CPCB01D53/1406B01D53/1418B01D53/1475B01D53/18B01D2257/504Y02A50/20Y02C20/40
Inventor 雷子瑜莫沅田洪鹏毛宇文彭云峰陈孝国潘子江张国伟
Owner 上海朴力节能环保科技有限公司
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