Method and device system for preventing DMO (dimethyl oxalate) from curing in ethylene glycol industrial production
A technology of dimethyl oxalate and dimethyl oxalate, applied in chemical instruments and methods, feeding devices, organic chemistry, etc., can solve problems such as poor steam temperature adjustability, many external influence factors, and DMO solidification and spread , to achieve the effect of ensuring long-term stable operation, solving the problem of easy curing and low energy consumption
Active Publication Date: 2012-06-27
PUJING CHEM IND SHA
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Problems solved by technology
One of the disadvantages is that there will be blind spots during the production and installation of the steam accompanying pipe, and the DMO in the process pipeline without accompanying pipe will solidify and spread rapidly during use
The second disadvantage is the poor adjustability of the steam temperature, which is affected by many external factors
The third disadvantage is high energy consumption
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[0015] The anti-curing method of dimethyl oxalate in the industrial production of ethylene glycol of the present invention is to collect the heat generated by the synthetic reaction of dimethyl oxalate with circulating water, and use the high-temperature steam formed by the circulating water to heat the hot water storage tank at the same time , Use the water in the hot water storage tank to carry out circulation heating and heat preservation on the delivery pipeline of dimethyl oxalate.
[0016] The device system used in the dimethyl oxalate anti-curing method provided by the invention includes a dimethyl oxalate synthesis reactor 1 and a circulating water system for collecting heat of reaction, wherein the circulating water system includes a high-temperature steam pipeline 2, hot water Circulation pump 14 and low-pressure steam flash tank 5, in which high-temperature steam pipeline 2 is connected to hot water storage tank 8 through temperature regulating valve 6 and temperatur...
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Abstract
The invention discloses a method and device system for preventing DMO (dimethyl oxalate) from curing in ethylene glycol industrial production. Heat generated from a DMO synthetic reaction is collected by circulating water; high-temperature steam formed by the circulating water is used for heating a hot water tank; and the water in the hot water tank is utilized to circularly heat a conveying pipeline of DMO and keep the conveying pipeline warm. The byproduct steam of the reaction is utilized according to the method, so that the energy consumption is small, the cost of ethylene glycol is reduced, the easily curing phenomenon of DMO in the pipeline is thoroughly eliminated, the long-term stable running of production is ensured, the water temperature of a jacket is precisely controlled and the stable long-term production of an industrial production device is boosted.
Description
[0001] technical field [0002] The invention relates to an industrial synthesis gas production project of ethylene glycol, in particular to a dimethyl oxalate anti-curing conveying and feeding method in the industrial production of ethylene glycol and a device system used in the method. [0003] Background technique [0004] In the ethylene glycol industrial production unit, ethylene glycol is produced by the hydrogenation reaction of the intermediate product dimethyl oxalate (DMO). Dimethyl oxalate is a colorless monoclinic crystal with a melting point of 57°C and is a solid at room temperature. In industrial production, DMO is required to flow in the pipeline in a liquid state. Most of the existing syngas-to-ethylene glycol plants use 0.3MPa low-pressure steam as the accompanying steam to prevent DMO from solidifying in the pipeline. One of the disadvantages is that there will be blind spots during the manufacture and installation of the steam accompanying pipe, and th...
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IPC IPC(8): C07C31/20C07C29/149B01J4/00C07C69/36C07C67/36
Inventor 方凤银
Owner PUJING CHEM IND SHA