Device and method for production of refined ethylene oxide
A technology of ethylene oxide and products, which is applied in the field of equipment for producing refined ethylene oxide, can solve problems such as non-optimal energy utilization, EO leakage, and complicated processes, and achieve reasonable energy comprehensive utilization, reduced rotating equipment, and equipment compact effect
Active Publication Date: 2017-09-01
SINOPEC ENG +1
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Problems solved by technology
[0009] Compared with other existing processes, this process has been improved, but the process is still relatively complicated, especially there are many rotating equipment, including four pumps for conveying EO-containing media. Improper operation may easily cause EO leakage, and EO is highly toxic. Explosive media, so from a safety point of view, the use of rotating equipment should be minimized
This process uses the EO-lean absorption water in the tank of the stripping / rectification tower to be boosted by the pump, and part of it is used as the reboiler of the EO refining tower and the CO 2 After the heat source of the stripper reboiler is used, it is combined and returned to the EO absorption tower. Although the energy-saving design is considered, the energy utilization of the EO-lean absorption water is not optimal
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[0051] use as figure 2 The device for producing refined ethylene oxide is shown. The device comprises: EO product tower 22 and EO aldehyde discharge tower 23; EO product tower 22 is provided with EO product tower reboiler 31, and EO aldehyde discharge tower 23 is provided with EO aldehyde discharge tower reboiler 33;
[0052] The top of the EO product tower 22 is sequentially connected to the condenser 8, the reflux tank 9 and the EO reflux pump 10, and the outlet pipeline of the EO reflux pump 10 is connected to the top of the EO product tower 22, wherein the process side of the condenser 8 is provided with light component non-condensable gas discharge line 21;
[0053] After the outlet at the bottom of the EO product tower 22 is connected to the EO product tower kettle pump 32, one of them is connected to the EO aldehyde removal tower reboiler 33, and is merged and returned to the front EO absorption section;
[0054] Refined EO product 20 is extracted from the side line ...
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The invention provides a device and a method for production of refined ethylene oxide. The device comprises an EO product tower, an EO aldehyde discharge tower, a condenser, a return tank and an EO reflux pump. The EO product tower roof is successively connected to the condenser, the return tank and the EO reflux pump. An outlet pipe of the EO reflux pump is connected to the top of the EO product tower. The side of the EO product tower is provided with an EO aldehyde discharge line which is connected to the EO aldehyde discharge tower. A gas pipeline at the top of the EO aldehyde discharge tower is connected to the EO product tower. An EO absorbed water-enriched refining chamber is arranged inside the body of the EO product tower. The EO absorbed water-enriched refining chamber successively contains an EO refining section for communication of a vapor phase and a liquid phase, an EO enriching section and an EO stripping section from top to bottom. By the above device and the method, operational safety of the device is raised, and land occupation and investment are saved. In addition, comprehensive utilization of energy is more reasonable, and operational cost is reduced.
Description
technical field [0001] The invention relates to the field of ethylene oxide production, and more particularly, relates to a device and method for producing refined ethylene oxide. Background technique [0002] In recent years, the domestic market demand for ethylene oxide has been strong, and the price has remained high. On the other hand, due to the impact of imported ethylene glycol and coal-based ethylene glycol from the Middle East, the market has generally been in a downturn. Therefore, the construction of an ethylene oxide plant that mainly produces refined ethylene oxide and produces a small amount of ethylene glycol as a by-product not only has lower investment than conventional ethylene oxide / ethylene glycol (EO / EG) plants, but also has higher product benefits. it is good. [0003] Therefore, the development of a high-safety, low-energy-consumption production process based on refined EO has become a key research direction for various technology providers. [0004]...
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IPC IPC(8): C07D301/32C07D303/04
CPCC07D301/32C07D303/04
Inventor 王炜刘洁盛在行王艳丽
Owner SINOPEC ENG