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A low-temperature methanol washing and split-flow technology, applied in the field of gas purification, can solve the problems of large mutual influence of heat balance of heat exchangers, high interdependence of logistics, and complex heat exchange network, so as to reduce energy consumption and complexity , the effect of saving steam consumption
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AI technical title is built by PatSnap AI team. It summarizes the technical point description of the patent document.
A low-temperature methanol washing and split-flow technology, applied in the field of gas purification, can solve the problems of large mutual influence of heat balance of heat exchangers, high interdependence of logistics, and complex heat exchange network, so as to reduce energy consumption and complexity , the effect of saving steam consumption
CN101590356BActive π Publication Date: 2011-07-20SHANGHAI INT ENG CONSULTING
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[0035] Such as figure 2 The split-flow low-temperature methanol washing device shown includes absorption tower T1, medium-pressure flash tower T2, reabsorption tower T4, thermal regeneration tower T5, methanol water tower T6, tail gas scrubber T7, several heat exchangers, pumps, cycle compression Machine C1; the raw gas is first washed by the raw gas scrubber (not shown in the figure), mixed with the circulating gas after washing, and enters the lower section of the absorption tower T1 after being cooled by the first heat exchanger E1; the upper section of the absorption tower T1 for CO 2 Absorption section, the lower section is H 2 S absorption section.
[0036] The CO in the raw gas after passing through the absorption tower T1 2 The impurities and sulfides are effectively removed, and the purified gas from the top of the absorption tower T1 passes through the first heat exchanger E1 after heat exchange and then exits the device.
[0037] The upper section of the absorp...
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Abstract
The present invention discloses a split-flow rectisol device, which comprises an absorption tower, a medium pressure flash tower, a reabsorber, a hot regenerating tower, a methanol water tower, a tail gas washing tower, a plurality of heat exchangers, pumps and a circulation compressor; and the upper section of the reabsorber is provided with a flash distillation section. The split-flow rectisol device is not provided with a CO2 product tower, and reduces the complexity of the flow and the investment on the premise of ensuring that CO2 product gas is qualified. The split-flow rectisol device is provided with a novel split-flow rectisol (acid gas removal) flow for absorption from a semi-lean methanol liquid feeding absorption tower on the upper section of the reabsorber, reduces the dosage of lean methanol of the absorption tower, further can reduce the energy consumption of the hot regenerating tower for hot regeneration, and saves the dosage of gas stripping nitrogen, consumption of steam, and low level cold quantity used when the lean methanol is cooled.
Description
technical field [0001] The invention relates to the technical field of gas purification, in particular to a split-flow low-temperature methanol washing device that uses low-temperature methanol as an absorbent to remove impurities such as organic impurities, CO2, sulfide, and moisture in mixed gas. The split-type low-temperature methanol washing device is suitable for purification of synthetic gas (containing hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, nitrogen, methane, etc.) to produce synthetic ammonia, synthetic methanol, synthetic oil (gasoline, diesel, etc.) and synthetic natural gas (SNG) Low-energy new split-type low-temperature methanol washing (acid gas removal technology) for LNG (liquefied natural gas) purification in other fields or natural gas purification. Background technique [0002] The low-temperature methanol washing technology uses low-temperature methanol as an absorbent, and uses the physical characteristics of methanol to have a high ...
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