Water washing device of low-temperature methanol tail gas and process method of water washing device
A low-temperature methanol washing and water washing device technology, applied in the coal chemical industry, can solve the problems of a large increase in the amount of desalinated water and a large amount of methanol-containing wastewater, and achieve the effects of reducing alcohol-containing water, avoiding the problem of water vapor condensation, and reducing operating load.
Active Publication Date: 2017-01-04
CHINA TIANCHEN ENG +1
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Problems solved by technology
The traditional low-temperature methanol washing tail gas water washing process uses desalinated water to absorb methanol in the tail gas. In order to meet the latest environmental protection requirements, the amount of desalinated water is greatly increased, which also directly leads to a large amount of methanol-containing wastewater, and the capacity of the corresponding sewage treatment unit also needs to be improved.
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[0037] Unless otherwise specified, the terms used herein have the meanings commonly understood by those skilled in the art. In order to facilitate the understanding of the present invention, some terms used herein are defined as follows.
[0038] All numerical designations, such as pH, temperature, time, concentration, including ranges, are approximate. It is to be understood that, although not always expressly stated, all numerical designations are preceded by the term "about". It is also to be understood that, although not always explicitly stated, the reagents described herein are merely exemplary and equivalents are known in the art.
[0039] The present invention will be described in detail below in conjunction with examples.
[0040] Such as figure 1 Shown, a kind of low-temperature methanol washing tail gas water washing device comprises tail gas water washing tower 1, methanol-water separation tower 2, heat exchanger 3, methanol stripping tower 4 and vent tube 5 conn...
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The invention provides a water washing device of low-temperature methanol tail gas and a process method of the water washing device. The water washing device comprises a tail gas water washing tower, a methanol water separation tower, a heat exchanger, a methanol stripping tower and an emptying barrel, which are connected through a pipeline; an upper end inlet of the tail gas water washing tower is connected with a desalted water source; a top outlet of the tail gas water washing tower is communicated with an inlet of the emptying barrel; a bottom inlet of the tail gas water washing tower is connected with a methanol-containing tail gas source; a bottom outlet of the tail gas water washing tower is communicated with a cold end inlet of the heat exchanger and the inlet of the methanol water separation tower; a cold end outlet of the heat exchanger is communicated with the upper end inlet of the methanol stripping tower; a hot end inlet of the heat exchanger is communicated with the bottom outlet of the methanol stripping tower; a hot end outlet of the heat exchanger is communicated with the upper end inlet of the tail gas water washing tower. The water washing device of the low-temperature methanol tail gas, provided by the invention, adopts the technical scheme above, so that the content of methanol in the tail gas is reduced and the use amount of desalted water can be reduced.
Description
technical field [0001] The invention belongs to the field of coal chemical industry, and in particular relates to a low-temperature methanol washing tail gas water washing device and a process method thereof. Background technique [0002] The low-temperature methanol washing section is widely used in new coal chemical projects due to its low energy consumption and large device processing capacity. At present, low-temperature methanol washing technology is mostly used in the acid gas removal section of large-scale coal chemical engineering projects. With the increasingly stringent environmental protection requirements, according to the requirements of GB31571-2015, the methanol emission in the low-temperature methanol scrubbing tail gas shall not exceed 50mg / m 3 . The traditional low-temperature methanol washing tail gas water washing process uses desalinated water to absorb methanol in the tail gas. In order to meet the latest environmental protection requirements, the amo...
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Login to View More IPC IPC(8): B01D53/18B01D3/38B01D3/42C02F1/04C02F101/34C02F103/18
CPCB01D3/38B01D3/4205B01D53/1487B01D53/1493B01D53/18B01D2252/103B01D2252/2021C02F1/04C02F2101/34C02F2103/18C02F2209/02C02F2303/10C02F2303/14
Inventor 段宏悦曹立英刘健梅岚崔健方佳丁辉郭超
Owner CHINA TIANCHEN ENG