CN115978448A - Carbon dioxide emptying waste recycling process - Google Patents
Carbon dioxide emptying waste recycling process Download PDFInfo
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- CN115978448A CN115978448A CN202310020080.6A CN202310020080A CN115978448A CN 115978448 A CN115978448 A CN 115978448A CN 202310020080 A CN202310020080 A CN 202310020080A CN 115978448 A CN115978448 A CN 115978448A
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- carbon dioxide
- pressure
- emptying
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- material gas
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 184
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 92
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 92
- 238000004064 recycling Methods 0.000 title claims abstract description 31
- 239000002699 waste material Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000011084 recovery Methods 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 239000002994 raw material Substances 0.000 claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 claims abstract description 31
- 230000001105 regulatory effect Effects 0.000 claims description 21
- 239000000047 product Substances 0.000 claims description 18
- 239000013589 supplement Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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Abstract
The invention discloses a carbon dioxide emptying waste recycling process, which is characterized in that two recycling towers are arranged, one recycling tower is a low-pressure emptying recycling tower and is connected with an emptying pipeline of a liquid carbon dioxide tank car, and the emptying low-pressure carbon dioxide of the liquid carbon dioxide tank car is recycled and stored; one is a high-pressure emptying recovery tower which is connected with a liquid carbon dioxide product storage tank and used for recovering and storing high-pressure carbon dioxide emptied from the liquid carbon dioxide product storage tank; the discharge ports of the low-pressure emptying recovery tower and the high-pressure emptying recovery tower are respectively connected with the raw material gas production device, and the recovered carbon dioxide is returned to the raw material gas production device, so that the waste of the carbon dioxide is avoided.
Description
Technical Field
The invention relates to a recovery process of carbon dioxide in industry, in particular to a process for recycling carbon dioxide emptying wastes.
Background
There are two main types of carbon dioxide-rich gas sources currently available for industrial recovery, namely natural carbon dioxide gas sources and industrial byproduct gas sources. With the development of science and technology, high-purity carbon dioxide with the purity of 99.999 percent is widely applied in various fields of national economy. In production, the carbon dioxide purified in the forms of adsorption and rectification and the like is cooled and then stored in a carbon dioxide finished product tank in a liquid form, and the liquid carbon dioxide is transported to a client in a storage and transportation mode by a tank car.
When emptying from the liquid carbon dioxide storage tank to the tank wagon, a gas pipeline is connected between the top of the liquid carbon dioxide storage tank and the top of the liquid carbon dioxide tank wagon storage tank, a valve is installed on the gas pipeline, and a liquid pipeline is connected between the bottom of the liquid carbon dioxide storage tank and the bottom of the liquid carbon dioxide tank wagon storage tank. Before a tank car is filled, carbon dioxide gas needs to be emptied, and is directly emptied to the atmosphere at present, so that waste of carbon dioxide raw materials and environmental pollution are caused. After the tank car is filled, the liquid carbon dioxide storage tank needs to be emptied, the carbon dioxide is directly returned to the feed gas, and a stability control device is not arranged, so that the feed gas pressure fluctuation is large.
Disclosure of Invention
The invention aims to provide a process for recycling carbon dioxide emptying waste.
The invention aims to be realized by the following technical scheme: a carbon dioxide emptying waste recycling process is provided with two recycling towers, wherein one recycling tower is a low-pressure emptying recycling tower and is connected with an emptying pipeline of a liquid carbon dioxide tank car, and the emptying low-pressure carbon dioxide of the liquid carbon dioxide tank car is recycled and stored; one is a high-pressure emptying recovery tower which is connected with a liquid carbon dioxide product storage tank and used for recovering and storing high-pressure carbon dioxide emptied from the recovered liquid carbon dioxide product storage tank; the discharge ports of the low-pressure emptying recovery tower and the high-pressure emptying recovery tower are respectively connected with the raw material gas production device, and the recovered carbon dioxide is returned to the raw material gas production device.
The discharge ports of the low-pressure emptying recovery tower and the high-pressure emptying recovery tower are respectively provided with a pressure reducing device and an automatic regulating valve, the automatic regulating valve is linked with the air pressure of the raw material gas production device to control the opening degree of the automatic regulating valve, so that the upstream carbon dioxide raw material gas is not fluctuated, the pressure of the raw material gas is stably controlled at the full-load production pressure, and the long-period full-load production of the production device is ensured.
Another object of the present invention is to provide a carbon dioxide blowdown waste recycle system to achieve the above process.
Specifically, the carbon dioxide emptying waste recycling system comprises two recycling towers, wherein one recycling tower is a low-pressure emptying recycling tower and is connected with an emptying pipeline of a liquid carbon dioxide tank car, and the emptying low-pressure carbon dioxide of the liquid carbon dioxide tank car is recycled and stored; one is a high-pressure emptying recovery tower which is connected with a liquid carbon dioxide product storage tank and used for recovering and storing high-pressure carbon dioxide emptied from the liquid carbon dioxide product storage tank; the discharge ports of the low-pressure emptying recovery tower and the high-pressure emptying recovery tower are respectively connected with the raw material gas production device, and the recovered carbon dioxide is returned to the raw material gas device.
The discharge ports of the low-pressure emptying recovery tower and the high-pressure emptying recovery tower are respectively provided with a pressure reducing device and an automatic regulating valve, the automatic regulating valve is linked with the air pressure of the raw material gas production device to control the opening degree of the automatic regulating valve, so that the upstream carbon dioxide raw material gas is not fluctuated, the pressure of the raw material gas is stably controlled at the full-load production pressure, and the long-period full-load production of the production device is ensured.
The invention has the following beneficial effects:
1. the invention utilizes the process pipeline and the intermediate collecting buffer tank to recycle the tank car filling and the emptying waste carbon dioxide of the product storage tank, thereby reducing the waste and the environmental pollution caused by directly emptying carbon dioxide gas into the atmosphere. The discharged carbon dioxide gas is supplemented to the raw material gas through a process pipeline, a pressure reducing device and an automatic regulating valve, the supplement of the raw material gas is automatically regulated according to the fluctuation of the raw material gas, the carbon dioxide production device is kept in a full-load state for a long time, and the waste of electric energy consumption in low-load operation of the production device is reduced.
Drawings
FIG. 1 is a schematic diagram of a carbon dioxide blowdown waste recycling system provided by the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description is given with reference to specific embodiments.
Example 1
As shown in figure 1, the carbon dioxide emptying waste recycling system comprises two recycling towers, wherein one recycling tower is a low-pressure emptying recycling tower and is connected with an emptying pipeline of a liquid carbon dioxide tanker, and the low-pressure carbon dioxide emptied from the liquid carbon dioxide tanker is recycled and stored; one is a high-pressure emptying recovery tower which is connected with a liquid carbon dioxide product storage tank and used for recovering and storing high-pressure carbon dioxide emptied from the recovered liquid carbon dioxide product storage tank; the discharge ports of the low-pressure emptying recovery tower and the high-pressure emptying recovery tower are respectively connected with a raw material gas production device, and the recovered carbon dioxide is returned to the raw material gas device.
The pipeline connecting the low-pressure emptying recovery tower and the liquid carbon dioxide tank car is provided with an automatic valve.
The emptying ports of the high-purity product storage tank and the high-purity product emptying tank are respectively connected with the high-pressure emptying recovery tower through pipelines and valves.
The emptying port of the ultra-pure product storage tank in the production line is connected with a low-pressure emptying recovery tower through a pipeline and a valve, and the emptying gas of the ultra-pure product storage tank is recovered.
The discharge ports of the low-pressure emptying recovery tower and the high-pressure emptying recovery tower are respectively provided with a pressure reducing device and an automatic regulating valve, the automatic regulating valve is linked with the air pressure of the raw material gas production device to control the opening degree of the automatic regulating valve, so that the upstream carbon dioxide raw material gas is not fluctuated, the pressure of the raw material gas is stably controlled at the full-load production pressure, and the long-period full-load production of the production device is ensured.
Example 2
Before the liquid carbon dioxide tank car is filled with liquid carbon dioxide, emptying carbon dioxide gas in the tank car, opening a valve connected with a low-pressure emptying recovery tower, and recovering and storing the low-pressure carbon dioxide emptied by the liquid carbon dioxide tank car.
After the tank car is filled, the liquid carbon dioxide storage tank needs to be emptied, a valve connected with the high-pressure emptying recovery tower is opened, and the emptied carbon dioxide of the high-purity product storage tank and the emptied carbon dioxide of the high-purity product emptying tank are recovered to the high-pressure emptying recovery tower to be stored.
The automatic regulating valve that low pressure unloading recovery tower and high pressure unloading recovery tower discharge port set up respectively is linked with feed gas apparatus for producing's atmospheric pressure, according to feed gas apparatus for producing's pressure, open the automatic regulating valve of low pressure unloading recovery tower and high pressure unloading recovery tower, simultaneously according to the aperture of the corresponding automatic regulating valve of specific pressure control, send the carbon dioxide of storage to feed gas apparatus for producing, control under the condition that upstream carbon dioxide feed gas does not produce undulant, at full load production pressure feed gas pressure stable control, guarantee apparatus for producing long period full load production. When the pressure of the raw material gas is lower than 0.023MPa, the valve is automatically opened, the more the pressure is lower than the set value of 0.023MPa, the larger the opening of the valve is, and the possibility that the pressure of the raw material gas can be supplemented to the set value by increasing the supplement amount is increased.
The above description is of the preferred embodiments of the present invention. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (4)
1. A carbon dioxide emptying waste recycling process is characterized in that two recycling towers are arranged, one of the recycling towers is a low-pressure emptying recycling tower and is connected with an emptying pipeline of a liquid carbon dioxide tanker, and the emptying low-pressure carbon dioxide of the liquid carbon dioxide tanker is recycled and stored; one is a high-pressure emptying recovery tower which is connected with a liquid carbon dioxide product storage tank and used for recovering and storing high-pressure carbon dioxide emptied from the recovered liquid carbon dioxide product storage tank; and the discharge ports of the low-pressure emptying recovery tower and the high-pressure emptying recovery tower are respectively connected with a raw material gas production device, and the recovered carbon dioxide is returned to the raw material gas production device.
2. The carbon dioxide blowdown abandonment recycling process of claim 1, wherein the discharge ports of the low pressure blowdown recovery tower and the high pressure blowdown recovery tower are respectively provided with a pressure reducing device and an automatic regulating valve, the automatic regulating valve is linked with the air pressure of a raw material gas production device, a set raw material gas pressure parameter value is controlled through DCS operation and is associated with the opening of the automatic regulating valve, when the air pressure of the raw material gas is higher than a set value, the valve is closed, when the air pressure of the raw material gas is lower than the set value, the automatic regulating valve is automatically opened to supplement the raw material gas to the set pressure, the opening of the automatic regulating valve is controlled, and the recycled carbon dioxide is returned to the raw material gas production device.
3. The carbon dioxide emptying waste recycling system is characterized by comprising two recycling towers, wherein one recycling tower is a low-pressure emptying recycling tower and is connected with an emptying pipeline of a liquid carbon dioxide tanker, and the emptying low-pressure carbon dioxide of the liquid carbon dioxide tanker is recycled and stored; one is a high-pressure emptying recovery tower which is connected with a liquid carbon dioxide product storage tank and used for recovering and storing high-pressure carbon dioxide emptied from the liquid carbon dioxide product storage tank; and the discharge ports of the low-pressure emptying recovery tower and the high-pressure emptying recovery tower are respectively connected with a raw material gas production device, and the recovered carbon dioxide is returned to the raw material gas production device.
4. The carbon dioxide blowdown waste recycling system of claim 3, wherein the low pressure blowdown recovery tower and the high pressure blowdown recovery tower discharge port are respectively provided with a pressure reducing device and an automatic regulating valve, and the automatic regulating valve is linked with the air pressure of the raw material gas production device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310020080.6A CN115978448A (en) | 2023-01-06 | 2023-01-06 | Carbon dioxide emptying waste recycling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310020080.6A CN115978448A (en) | 2023-01-06 | 2023-01-06 | Carbon dioxide emptying waste recycling process |
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| Publication Number | Publication Date |
|---|---|
| CN115978448A true CN115978448A (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310020080.6A Pending CN115978448A (en) | 2023-01-06 | 2023-01-06 | Carbon dioxide emptying waste recycling process |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010120019A1 (en) * | 2009-04-15 | 2010-10-21 | 주식회사 엔케이 | Gas-filling system having a residual-gas recovery device, and residual-gas recovery method |
| CN103104808A (en) * | 2012-12-31 | 2013-05-15 | 安庆凯美特气体有限公司 | Method for loading food-grade liquid carbon dioxide product into storage tank of liquid tank car |
| CN209672045U (en) * | 2018-12-20 | 2019-11-22 | 山西晋丰煤化工有限责任公司 | Nitrogen-hydrogen compressor high pressure, which is dropped a hint, is recovered under reduced pressure system |
| CN211821716U (en) * | 2020-03-19 | 2020-10-30 | 贵州天福化工有限责任公司 | Recovery device for emptying gas of liquid carbon dioxide storage tank |
| CN212510474U (en) * | 2020-03-19 | 2021-02-09 | 惠州凯美特气体有限公司 | Liquid carbon dioxide tank car fills dress processing system |
| CN112797317A (en) * | 2021-01-28 | 2021-05-14 | 西安热工研究院有限公司 | A working fluid recovery system and control method for a supercritical carbon dioxide cycle generator set |
-
2023
- 2023-01-06 CN CN202310020080.6A patent/CN115978448A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010120019A1 (en) * | 2009-04-15 | 2010-10-21 | 주식회사 엔케이 | Gas-filling system having a residual-gas recovery device, and residual-gas recovery method |
| CN103104808A (en) * | 2012-12-31 | 2013-05-15 | 安庆凯美特气体有限公司 | Method for loading food-grade liquid carbon dioxide product into storage tank of liquid tank car |
| CN209672045U (en) * | 2018-12-20 | 2019-11-22 | 山西晋丰煤化工有限责任公司 | Nitrogen-hydrogen compressor high pressure, which is dropped a hint, is recovered under reduced pressure system |
| CN211821716U (en) * | 2020-03-19 | 2020-10-30 | 贵州天福化工有限责任公司 | Recovery device for emptying gas of liquid carbon dioxide storage tank |
| CN212510474U (en) * | 2020-03-19 | 2021-02-09 | 惠州凯美特气体有限公司 | Liquid carbon dioxide tank car fills dress processing system |
| CN112797317A (en) * | 2021-01-28 | 2021-05-14 | 西安热工研究院有限公司 | A working fluid recovery system and control method for a supercritical carbon dioxide cycle generator set |
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