Dimethyl ether energy-saving heating device and method

A heating method and a heating device technology, which can be used in ether preparation, ether separation/purification, sustainable manufacturing/processing, etc., and can solve the problems of reducing cooling effect, waste of heat energy, etc.

Active Publication Date: 2014-01-15
ENN XINNENG BEIJING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the treated sewage is used in the condensation process, which reduces the cooling effect and causes waste of heat energy

Method used

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  • Dimethyl ether energy-saving heating device and method

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specific Embodiment approach

[0032] Its specific implementation is as follows:

[0033] A, in the first flash tank 2, the medium-temperature condensed water produced by the rectification tower reboiler 3 and the methanol vaporizer is flashed to obtain low-pressure steam;

[0034] B, high-pressure steam tank 7 provides high-pressure steam;

[0035] C. Transport the low-pressure steam generated by A to the steam ejector 5, and at the same time, the high-pressure steam generated by B passes through the internal nozzle of the steam ejector 5, decompresses and accelerates to form a high-speed low-pressure airflow, which drives the low-pressure steam to move, and the two streams share The velocity of the shaft steam is balanced, while the velocity of the mixed steam is reduced and the pressure is increased. By adjusting the ratio of high-pressure steam and low-pressure steam, mixed steam with different pressures can be obtained;

[0036] D. The medium-pressure steam produced by C is sent to the buffer tank 6 f...

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Abstract

The invention discloses a dimethyl ether energy-saving heating device relating to the technical field of dimethyl ether production. The device comprises a rectification tower reboiler, a methanol vaporizer, a buffer tank, a first flash tank, a vapor injector and a high-pressure vapor tank, wherein the first flash tank is respectively connected with the rectification tower reboiler and the methanol vaporizer through a first pump; the vapor injector is respectively connected with the first flash tank and the high-pressure vapor tank; the vapor injector is composed of a nozzle and a cavity; the inside of the cavity is sequentially provided with a receiving chamber, a mixing chamber and a diffusion chamber; the vapor injector is connected with the buffer tank; and the buffer tank is respectively connected with the rectification tower reboiler and the methanol vaporizer. According to the invention, high-temperature condensation water and medium-temperature condensation water are converted into medium-pressure vapor, so that the heat energy contained in the condensation water is effectively utilized, and the purpose of energy saving is achieved, thereby avoiding the use of the discharged condensation water in the condensation procedure and reducing the cooling effect.

Description

technical field [0001] The invention relates to the technical field of dimethyl ether production, in particular to an energy-saving heating device and method for dimethyl ether. Background technique [0002] Dimethyl ether (DME) is a colorless gas with an ether smell. It has many unique uses in chemical industries such as pharmaceuticals, fuels, and pesticides. It can replace Freon as an aerosol propellant and refrigerant to reduce environmental impact. pollute. DME can also be used as a substitute for city gas and liquefied petroleum gas, and it is superior to methanol as a substitute for automobile fuel. In addition, dimethyl ether can also be used as a foaming agent, coupling agent, where low-carbon olefins are used to produce high-octane gasoline, aromatics and high-molecular-weight oxygenated hydrocarbons, etc. [0003] The high-temperature condensed water discharged from the reboiler of the recovery tower has high heat energy. In the traditional production process, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/04C07C41/42C07C31/04C07C29/76
CPCC07C41/42C07C43/043Y02P20/10
Inventor 刘文祥
Owner ENN XINNENG BEIJING TECH
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