阅读说明：本技术 含环氧丙烷工业尾气的环氧丙烷精制提取系统 (Epoxypropane refining and extracting system containing epoxypropane industrial tail gas ) 是由 万里鹏 万和昌 于 2020-05-08 设计创作，主要内容包括：本发明公开一种可将碳酸酯生产中尾气进行有效处理的含环氧丙烷工业尾气的环氧丙烷精制提取系统,包括脱气塔、环氧丙烷精馏塔,其中,脱气塔位于前端并与环氧丙烷精馏连接；含环氧丙烷的原料气或含环氧丙烷冷凝液进入脱气塔进行精馏,其中,重组分釜液排出进入至所述环氧丙烷精馏塔内进行精馏,轻组分经冷凝、脱气后其气体排出,其冷凝液再次进入脱气塔塔内精馏；经脱气塔进入环氧丙烷精馏塔内的重釜液精馏后,其重组分为废液排出,其轻组分经冷凝、分离后其废气排出,其冷凝液为环氧丙烷液态排出。(The invention discloses a propylene oxide refining and extracting system containing propylene oxide industrial tail gas, which can effectively treat tail gas in carbonate production, and comprises a degassing tower and a propylene oxide rectifying tower, wherein the degassing tower is positioned at the front end and is connected with the rectification of the propylene oxide; the raw material gas containing the epoxypropane or the condensate containing the epoxypropane enters a degassing tower for rectification, wherein the heavy component kettle liquid is discharged and enters the epoxypropane rectifying tower for rectification, the gas of the light component is discharged after condensation and degassing, and the condensate enters the degassing tower again for rectification; after the heavy still liquid entering the epoxypropane rectifying tower through the degassing tower is rectified, the heavy still liquid is discharged as waste liquid, the light component is condensed and separated, the waste gas is discharged, and the condensate liquid is discharged in epoxypropane liquid state.)

1. A epoxypropane refining and extracting system containing epoxypropane industrial tail gas is characterized in that: comprises a degassing tower and a propylene oxide rectifying tower, wherein the degassing tower is positioned at the front end and is connected with the rectification of the propylene oxide;

the raw material gas containing the epoxypropane or the condensate containing the epoxypropane enters a degassing tower for rectification, wherein the heavy component kettle liquid is discharged and enters the epoxypropane rectifying tower for rectification, the gas of the light component is discharged after condensation and degassing, and the condensate enters the degassing tower again for rectification;

after the heavy still liquid entering the epoxypropane rectifying tower through the degassing tower is rectified, the heavy still liquid is discharged as waste liquid, the light component is condensed and separated, the waste gas is discharged, and the condensate liquid is discharged in epoxypropane liquid state.

2. The system for refining and extracting propylene oxide from industrial tail gas containing propylene oxide as claimed in claim 1, wherein: the system also comprises a carbon dioxide separation tank, wherein the raw material gas containing the epoxypropane or the condensate containing the epoxypropane enters the carbon dioxide separation tank through a pipe, and a liquid discharge pipe at the bottom of the carbon dioxide separation tank is connected with the degassing tower.

3. The propylene oxide refining and extracting system containing the propylene oxide industrial tail gas as claimed in claim 2, characterized in that: the catalytic combustion device is characterized by further comprising a degassing condenser and a degassing separator, wherein a gas outlet at the top of the degassing tower is connected with an inlet of the degassing condenser, an outlet of the degassing condenser is connected with an inlet of the degassing separator, a gas outlet of the degassing separator is connected with the catalytic combustion device, and a liquid outlet at the bottom of the degassing separator is connected with the top of the degassing tower.

4. The system for refining and extracting propylene oxide from industrial tail gas containing propylene oxide as claimed in claim 1, wherein: and a liquid outlet at the bottom of the degassing tower is connected with the propylene oxide rectifying tower through a degassing kettle liquid pump.

5. The system for refining and extracting propylene oxide from industrial tail gas containing propylene oxide as claimed in claim 1, wherein: still include propylene oxide condenser, propylene oxide separator, wherein, the gas vent and the propylene oxide condenser access connection at propylene oxide rectifying column top, propylene oxide condenser export with propylene oxide separator access connection, the leakage fluid dram of propylene oxide separator divide into two the tunnel, wherein all the way with propylene oxide rectifying column top is connected, and another the tunnel is the export of propylene oxide finished product and is connected with a propylene oxide pump, and the export of propylene oxide pump divide into two the tunnel, wherein is connected with propylene oxide pump storage tank all the way, and another the tunnel is connected with the propylene oxide separator.

6. The system for refining and extracting propylene oxide from industrial tail gas containing propylene oxide as claimed in claim 5, wherein: an outlet at the top of the propylene oxide separator is connected with a tail gas treatment device; the tail gas treatment device comprises a vacuum fan and a water seal tank, wherein an outlet at the top of the epoxypropane separator is connected with an inlet of the vacuum fan, an outlet of the vacuum fan is connected with an air inlet of the water seal tank, and a nitrogen inlet is arranged on a pipeline between the vacuum fan and the epoxypropane separator;

the gas vent and the catalytic combustion device at water seal tank top are connected, water seal tank bottom leakage fluid dram is trained the level with album liquid jar, be equipped with a condenser pipe in the water seal tank, the condenser pipe import is connected with the liquid ammonia liquid storage pot, and the condenser pipe export is connected with the low pressure circulation bucket.

7. The system for refining and extracting propylene oxide from industrial tail gas containing propylene oxide as claimed in claim 6, wherein: and a liquid outlet at the bottom of the epoxypropane rectifying tower is connected with a propylene carbonate pump, an outlet of the propylene carbonate pump is divided into two paths, one path is a waste liquid discharge pipe, and the other path is communicated with the inside of the epoxypropane rectifying tower.

8. The system for refining and extracting propylene oxide from industrial tail gas containing propylene oxide as claimed in claim 7, wherein: still include refrigerating system, refrigerating system includes standard ammonia knockout drum, standard ammonia knockout drum air inlet is connected with the liquid ammonia storage tank, standard ammonia knockout drum bottom leakage fluid dram divide into two the tunnel and respectively with degasification condenser heat exchange tube import, epoxypropane condenser's heat exchange tube access connection, the heat exchange tube export in the epoxypropane condenser with the heat exchange tube export in the degasification condenser jointly with standard ammonia knockout drum air inlet is connected.

9. The system for refining and extracting propylene oxide from industrial tail gas containing propylene oxide as claimed in claim 1, wherein: and the inlets of the degassing reboiler in the degassing tower and the epoxypropane rectifying tower are connected with a heat-conducting medium supply main pipe, and the outlets of the degassing reboiler and the epoxypropane rectifying reboiler are connected with a heat-conducting medium reflux main pipe.

Technical Field

The invention relates to the technical field of tail gas treatment in carbonate production, in particular to a propylene oxide refining and extracting system containing propylene oxide industrial tail gas.

Background

In a carbonate preparation system, tail gas generated in the production process contains a large amount of highly-polluted and toxic gases such as propylene oxide and the like, and the propylene oxide and the like in the tail gas are common industrial raw materials, so that the problem of tail gas emission pollution can be reduced if the propylene oxide in the tail gas is extracted and treated, and economic benefits can be brought to production enterprises.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, adapt to the practical requirements and provide a propylene oxide refining and extracting system containing propylene oxide industrial tail gas.

In order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows:

discloses a propylene oxide refining and extracting system containing propylene oxide industrial tail gas, which is characterized in that: comprises a degassing tower and a propylene oxide rectifying tower, wherein the degassing tower is positioned at the front end and is connected with the rectification of the propylene oxide.

And (3) feeding the raw material gas containing the epoxypropane or the condensate containing the epoxypropane into a degassing tower for rectification, wherein the heavy component kettle liquid is discharged and enters the epoxypropane rectifying tower for rectification, the gas of the light component is discharged after condensation and degassing, and the condensate enters the degassing tower again for rectification.

After the heavy still liquid entering the epoxypropane rectifying tower through the degassing tower is rectified, the heavy still liquid is discharged as waste liquid, the light component is condensed and separated, the waste gas is discharged, and the condensate liquid is discharged in epoxypropane liquid state.

The system also comprises a carbon dioxide separation tank, wherein the raw material gas containing the epoxypropane or the condensate containing the epoxypropane enters the carbon dioxide separation tank through a pipe, and a liquid discharge pipe at the bottom of the carbon dioxide separation tank is connected with the degassing tower.

The catalytic combustion device is characterized by further comprising a degassing condenser and a degassing separator, wherein a gas outlet at the top of the degassing tower is connected with an inlet of the degassing condenser, an outlet of the degassing condenser is connected with an inlet of the degassing separator, a gas outlet of the degassing separator is connected with the catalytic combustion device, and a liquid outlet at the bottom of the degassing separator is connected with the top of the degassing tower.

And a liquid outlet at the bottom of the degassing tower is connected with the propylene oxide rectifying tower through a degassing kettle liquid pump.

Still include propylene oxide condenser, propylene oxide separator, wherein, the gas vent and the propylene oxide condenser access connection at propylene oxide rectifying column top, propylene oxide condenser export with propylene oxide separator access connection, the leakage fluid dram of propylene oxide separator divide into two the tunnel, wherein all the way with propylene oxide rectifying column top is connected, and another the tunnel is the export of propylene oxide finished product and is connected with a propylene oxide pump, and the export of propylene oxide pump divide into two the tunnel, wherein is connected with propylene oxide pump storage tank all the way, and another the tunnel is connected with the propylene oxide separator.

An outlet at the top of the propylene oxide separator is connected with a tail gas treatment device; the tail gas treatment device comprises a vacuum fan and a water seal tank, wherein an outlet at the top of the epoxypropane separator is connected with an inlet of the vacuum fan, an outlet of the vacuum fan is connected with an air inlet of the water seal tank, and a nitrogen inlet is formed in a pipeline between the vacuum fan and the epoxypropane separator.

The gas vent and the catalytic combustion device at water seal tank top are connected, water seal tank bottom leakage fluid dram is trained the level with album liquid jar, be equipped with a condenser pipe in the water seal tank, the condenser pipe import is connected with the liquid ammonia liquid storage pot, and the condenser pipe export is connected with the low pressure circulation bucket.

And a liquid outlet at the bottom of the epoxypropane rectifying tower is connected with a propylene carbonate pump, an outlet of the propylene carbonate pump is divided into two paths, one path is a waste liquid discharge pipe, and the other path is communicated with the inside of the epoxypropane rectifying tower.

Still include refrigerating system, refrigerating system includes standard ammonia knockout drum, standard ammonia knockout drum air inlet is connected with the liquid ammonia storage tank, standard ammonia knockout drum bottom leakage fluid dram divide into two the tunnel and respectively with degasification condenser heat exchange tube import, epoxypropane condenser's heat exchange tube access connection, the heat exchange tube export in the epoxypropane condenser with the heat exchange tube export in the degasification condenser jointly with standard ammonia knockout drum air inlet is connected.

And the inlets of the degassing reboiler in the degassing tower and the epoxypropane rectifying tower are connected with a heat-conducting medium supply main pipe, and the outlets of the degassing reboiler and the epoxypropane rectifying reboiler are connected with a heat-conducting medium reflux main pipe.

The invention has the beneficial effects that:

the system can extract the epoxypropane articles for use from the tail gas in the production of carbonic ester, can purify the tail gas and simultaneously can also obtain byproducts for enterprises, and improves the economic benefits of the enterprises when the tail gas is treated and then is environment-friendly.

Drawings

Fig. 1 is a schematic diagram of the main principle of the present invention.

Detailed Description

The invention is further illustrated with reference to the following figures and examples: