Dry gas sealing process of synthesis gas compressor
A gas compressor and dry gas sealing technology, which is applied in the sealing of engines, the preparation of organic compounds, mechanical equipment, etc., can solve the problems of reducing methanol yield and achieve the effect of ensuring cleanliness
Pending Publication Date: 2022-07-01
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0005] The present invention intends to provide a dry gas sealing process for a synthesis gas compressor to solve the technical problem in the prior art that the yield of methanol is reduced due to the infiltration of nitrogen into the synthesis gas when nitrogen gas is used to seal the synthesis gas
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Embodiment 1
[0022] In Example 1-Example 6, Comparative Example 1-Comparative Example 3, the difference between the purge gas and the formaldehyde yield after the synthesis gas intake and the synthetic formaldehyde are shown in Table 1, and Example 1 is taken as an example to illustrate the synthesis gas compressor The effect of dry gas sealing process on methanol production from syngas.
[0023] Example 1
[0024] A dry gas sealing process of a synthesis gas compressor is completed by relying on the multi-stage sealing device of the synthesis gas compressor, such as figure 1 As shown, it includes a main unit, a ventilation unit and a sealing unit; the main unit includes a casing 12 and a static ring 11 located in the casing. The static ring 11 is in an interference fit with the rotating shaft 10 or is connected by a key, so that the rotating shaft 10 can drive the static ring 11 together turn. The sealing unit is located between the static ring 11 and the casing 12 . The sealing unit i...
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The invention relates to the technical field of compressor dry gas sealing processes, and discloses a dry gas sealing process of a synthesis gas compressor. Comprising a sealing gas group for sealing a multi-stage sealing device in the synthesis gas compressor, and the sealing gas group comprises sealing gas and nitrogen; the sealing gas is one of synthesis gas, hydrogen, carbon monoxide and carbon dioxide; when the synthesis gas compressor is in a shutdown state, nitrogen is adopted to purge the interior of the instrument, so that dust is effectively prevented from entering the interior of the instrument to form friction with the interior of the instrument to cause instrument damage, and meanwhile, the cleanness of the instrument can be ensured; when the synthesis gas compressor is in a starting state, sealing gas is adopted to seal the sealing device close to the compression cavity, so that nitrogen is effectively prevented from entering the compression cavity to reduce the efficiency of synthesizing methanol from the synthesis gas. According to the scheme, the yield of methanol synthesized by the synthesis gas is effectively improved by replacing the sealing gas of the synthesis gas compressor, so that the economic benefit of methanol production is remarkably improved.
Description
technical field [0001] The invention relates to the technical field of compressor dry gas sealing technology, in particular to a dry gas sealing technology of a synthesis gas compressor. Background technique [0002] Methanol is one of the most important feedstocks in the chemical, petrochemical and energy industries. In industrial applications, it can be processed into bulk chemicals (such as formaldehyde and acetic acid), synthetic fuels (such as MTBE and DME), and its energy applications are dominated by methanol. The displacement of refined oil products in the form of to olefins (MTO) and gasoline blends as guides is in great demand. [0003] In the preparation of methanol, the main components of CO and H are first prepared from natural gas or coal. 2 the synthesis gas, the H / C molar ratio in the synthesis gas is adjusted to a range suitable for the preparation of methanol, and then the synthesis gas with the adjusted proportion is passed through the synthesis gas compr...
Claims
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IPC IPC(8): F16J15/40F16J15/34F16J15/38C07C29/152C07C31/04
CPCF16J15/40F16J15/3452F16J15/38C07C29/152C07C31/04
Inventor 杨中明
Owner CHINA PETROLEUM & CHEM CORP