CN113750559A - CO (carbon monoxide)2Tower top separation structure of purification and rectification tower - Google Patents
CO (carbon monoxide)2Tower top separation structure of purification and rectification tower Download PDFInfo
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- CN113750559A CN113750559A CN202011036754.4A CN202011036754A CN113750559A CN 113750559 A CN113750559 A CN 113750559A CN 202011036754 A CN202011036754 A CN 202011036754A CN 113750559 A CN113750559 A CN 113750559A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
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Abstract
The invention provides CO2The tower top separation structure of the purification and rectification tower comprises a rectification tower, wherein a filler section and a condensation section are arranged in the rectification tower, and a partition plate is arranged between the filler section and the condensation section; a carbon dioxide gas inlet is formed in the side wall of the rectifying tower at the lower end of the packing section; the rectifying tower between the partition plate and the packing section is communicated with the top of the rectifying tower through a conveying pipeline, a liquid carbon dioxide reflux opening is formed in the side wall of the rectifying tower between the condensation section and the partition plate, a liquid carbon dioxide inlet is formed in the side wall of the rectifying tower between the partition plate and the packing section, and the liquid carbon dioxide reflux opening is communicated with the liquid carbon dioxide inlet through a corresponding pipeline. According to the invention, the baffle plate is arranged in the rectifying tower, so that gas is enabled to flow from top to bottom, and by changing the flow direction of the gas, the discharge of non-condensable waste gas is avoided, impure product carbon dioxide is brought out, the productivity is improved, and the production running cost is reduced; thereby reducing product loss and improving apparatusAnd reduce its power consumption ratio.
Description
Technical Field
The invention relates to the technical field of carbon dioxide equipment, in particular to CO2The top of the purification and rectification tower is provided with a separation structure.
Background
The rectifying tower is used as key equipment of a carbon dioxide purification and liquefaction device and plays a vital role in the purity of the product carbon dioxide.
At present, tail gas of industrial gas is collected mostly for recycling domestic carbon dioxide, various impurity gases such as sulfur dioxide, alcohols, hydrocarbons and the like are contained in the industrial tail gas, the sulfur dioxide and the alcohol gases can be removed through adsorption, a rectifying tower in the device can treat hydrocarbon components in the gas, the content of organic impurities in the gas is reduced to the greatest extent, and the high-purity product carbon dioxide is finally prepared.
Therefore, the purification purity and efficiency of the rectifying tower play a non-negligible role in the production of carbon dioxide, and the traditional packed rectifying tower utilizes the difference of gas boiling points of impurity gas and carbon dioxide, so that non-condensable gas rises through a tower top condenser and is discharged from the top. When the pressure in the tower rises, the non-condensable gas can bring out the liquid carbon dioxide passing through the condenser at the top of the tower, so that the waste of products is caused, the yield of cold carbon dioxide is reduced, and the energy consumption of the whole device is increased.
At present, a separation structure at the top of a carbon dioxide purification and rectification tower adopts gas from bottom to top and liquid from top to bottom, and gas-liquid two phases are contacted in a counter-current way to carry out interphase heat and mass transfer. After condensation in the condensation section, the product liquid carbon dioxide is partially discharged from the bottom, and the noncondensable waste gas is partially discharged from the top, so that the gas and the liquid form a convection structure. However, due to the high pressure of the working conditions in the tower, liquid carbon dioxide is brought out while waste gas is discharged, so that product waste is caused, and the yield is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides CO2The top separation structure of the purification and rectification tower improves the productivity and reduces the production and operation cost by changing the flowing direction of gas.
The technical scheme of the invention is as follows: CO (carbon monoxide)2The tower top separation structure of the purification and rectification tower comprises a rectification tower, wherein a filler section and a condensation section are arranged in the rectification tower, and a partition plate is arranged between the filler section and the condensation section;
a carbon dioxide gas inlet is formed in the side wall of the rectifying tower at the lower end of the packing section;
the rectifying tower between the partition plate and the packing section is communicated with the top of the rectifying tower through a conveying pipeline, a liquid carbon dioxide reflux port is formed in the side wall of the rectifying tower between the condensation section and the partition plate, a liquid carbon dioxide inlet is formed in the side wall of the rectifying tower between the partition plate and the packing section, and the liquid carbon dioxide reflux port is communicated with the liquid carbon dioxide inlet through a corresponding pipeline.
Preferably, the filler section is arranged at the middle section of the bottom of the rectifying tower, and the condensing section is arranged at the top of the rectifying tower.
Preferably, a liquid carbon dioxide outlet is also arranged at the bottom of the rectifying tower at the lower end of the packing section.
Preferably, the sidewall of the rectifying tower between the condensation section and the partition plate is also provided with an uncondensed waste gas outlet.
Preferably, the filler of the filler section is stainless steel regular filler, and the stainless steel regular filler is stainless steel regular filler
Preferably, a condensate inlet and a condensate outlet are further arranged on the side wall of the rectifying tower of the condensation section.
The working principle is as follows:
gaseous carbon dioxide passes through in the carbon dioxide air inlet gets into the rectifying column, gaseous carbon dioxide gets into in the rectifying column between baffle and the filler section after screening through the filler section, then carry gaseous carbon dioxide to the rectifying column top of the tower through pipeline, then from last to down through the condensation section condensation, liquid carbon dioxide after the condensation passes through in liquid carbon dioxide backward flow mouth and the rectifying column of liquid carbon dioxide import entering baffle and filler section, then downwards get rid of through the liquid carbon dioxide export through the filler section, and noncondensable waste gas is got rid of through noncondensable waste gas export.
The invention has the beneficial effects that:
1. according to the invention, the baffle plate is arranged in the rectifying tower, so that gas is enabled to flow from top to bottom, and by changing the flow direction of the gas, the discharge of non-condensable waste gas is avoided, impure product carbon dioxide is brought out, the productivity is improved, and the production running cost is reduced;
2. the noncondensable waste gas is discharged from the middle sections of the tower body filling section and the condensing section to form a top-down flow direction, and the noncondensable gas cannot blow out product liquid when being discharged because the gas and the liquid flow in the top-down direction, so that the loss of products is reduced, the efficiency of the device is improved, and the energy consumption ratio of the device is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure, 1-a rectifying tower, 2-a packing section, 3-a condensing section, 4-a clapboard, 5-a carbon dioxide inlet, 6-a conveying pipeline, 7-a liquid carbon dioxide reflux port, 8-a liquid carbon dioxide inlet, 9-a liquid carbon dioxide outlet, 10-an uncondensed waste gas outlet, 11-a condensate inlet and 12-a condensate outlet.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
as shown in FIG. 1, the present embodiment provides a CO2Purification rectifying column top of tower isolating construction, including rectifying column 1, rectifying column 1 in be provided with filler section 2 and condensation segment 3, wherein, filler section 2 set up middle section position department at rectifying column 1 tower bottom, condensation segment 3 set up the top of the tower at rectifying column 1. And a partition plate 4 is arranged between the packing section 2 and the condensing section 3 in the embodiment. A carbon dioxide gas inlet 5 is arranged on the side wall of the rectifying tower 1 at the lower end of the filler section 2; the rectifying column 1 between the partition plate 4 and the packing section 2 is communicated with the top of the rectifying column 1 through a conveying pipeline 6, a liquid carbon dioxide reflux opening 7 is formed in the side wall of the rectifying column 1 between the condensation section 3 and the partition plate 4, a liquid carbon dioxide inlet 8 is formed in the side wall of the rectifying column 1 between the partition plate 4 and the packing section 2, and the liquid carbon dioxide reflux opening 7 is communicated with the liquid carbon dioxide inlet 8 through a corresponding pipeline. And a liquid carbon dioxide outlet 9 is also arranged at the bottom of the rectifying tower 1 at the lower end of the filling section 2.
Preferably, the sidewall of the rectifying tower 1 between the condensation section 3 and the partition 4 is further provided with an uncondensed waste gas outlet 10.
Preferably, a condensate inlet and a condensate outlet are further provided on the sidewall of the rectifying tower 1 of the condensing section 3 in this embodiment, and the condensate used in this embodiment is liquid nitrogen.
Preferably, the filler of the filler section 2 is stainless steel regular filler, and the stainless steel regular filler is stainless steel regular filler
The working principle is as follows:
gaseous carbon dioxide passes through in carbon dioxide air inlet 5 gets into rectifying column 1, gaseous carbon dioxide passes through 2 screens back entering baffle 4 and the rectifying column 1 between the filler section 2 of filler section, then carry gaseous carbon dioxide to the rectifying column 1 top of the tower through pipeline 6, then from last 3 condensations of condensation section down, liquid carbon dioxide after the condensation passes through liquid carbon dioxide backward flow mouth 7 and liquid carbon dioxide import 8 and gets into in the rectifying column 1 between baffle 4 and the filler section 2, then get rid of through liquid carbon dioxide export 9 downwards through filler section 2, and noncondensable waste gas is got rid of through noncondensable waste gas export 10.
This embodiment is under the condition that does not influence product purity, filler section 2 and the condensation segment 3 with the rectifying column tower body separate through middle baffle 4, carbon dioxide gas is at filler section 2 through the 6 top of the tower portion of outside pipeline flow direction rectifying column 1, carbon dioxide gas is again to passing through condensation segment 3 downwards, gaseous carbon dioxide condensation is liquid carbon dioxide, noncondensable waste gas is discharged in filler section 2 and the 3 middle sections of condensation segment of rectifying column 1, form a top-down flow direction mode, because gas and liquid all are the direction flow of top-down, can not blow out product liquid when noncondensable gas is discharged, thereby reduce the loss of product, the efficiency of improving the device with reduce its energy consumption ratio.
The foregoing embodiments and description have been presented only to illustrate the principles and preferred embodiments of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as hereinafter claimed.
Claims (7)
1. CO (carbon monoxide)2The top separation structure of the purification and rectification tower is characterized by comprising a rectification tower, wherein a filler section and a condensation section are arranged in the rectification tower, and a partition plate is arranged between the filler section and the condensation section;
a carbon dioxide gas inlet is formed in the side wall of the rectifying tower at the lower end of the packing section;
the rectifying tower between the partition plate and the packing section is communicated with the top of the rectifying tower through a conveying pipeline, a liquid carbon dioxide reflux port is formed in the side wall of the rectifying tower between the condensation section and the partition plate, a liquid carbon dioxide inlet is formed in the side wall of the rectifying tower between the partition plate and the packing section, and the liquid carbon dioxide reflux port is communicated with the liquid carbon dioxide inlet through a corresponding pipeline.
2. CO according to claim 12The top separation structure of the purification and rectification tower is characterized in that: the packing section is arranged at the middle section of the bottom of the rectifying tower, and the condensing section is arranged at the top of the rectifying tower.
3. CO according to claim 12The top separation structure of the purification and rectification tower is characterized in that: and a liquid carbon dioxide outlet is also arranged at the bottom of the rectifying tower at the lower end of the filler section.
4. CO according to claim 12The top separation structure of the purification and rectification tower is characterized in that: and an uncondensed waste gas outlet is also formed in the side wall of the rectifying tower between the condensation section and the partition plate.
5. CO according to claim 12The top separation structure of the purification and rectification tower is characterized in that: the filler of the filler section is stainless steel regular filler.
6. The method of claim 5CO (carbon monoxide)2The top separation structure of the purification and rectification tower is characterized in that: the stainless steel regular packing is stainless steel regular packing
7. CO according to claim 12The top separation structure of the purification and rectification tower is characterized in that: and a condensate inlet and a condensate outlet are also formed in the side wall of the rectifying tower of the condensation section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011036754.4A CN113750559A (en) | 2020-09-28 | 2020-09-28 | CO (carbon monoxide)2Tower top separation structure of purification and rectification tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011036754.4A CN113750559A (en) | 2020-09-28 | 2020-09-28 | CO (carbon monoxide)2Tower top separation structure of purification and rectification tower |
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| Publication Number | Publication Date |
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| CN113750559A true CN113750559A (en) | 2021-12-07 |
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| CN202011036754.4A Pending CN113750559A (en) | 2020-09-28 | 2020-09-28 | CO (carbon monoxide)2Tower top separation structure of purification and rectification tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117387311A (en) * | 2023-09-22 | 2024-01-12 | 华东能源环保股份有限公司 | High-purity liquid carbon dioxide purification device |
-
2020
- 2020-09-28 CN CN202011036754.4A patent/CN113750559A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117387311A (en) * | 2023-09-22 | 2024-01-12 | 华东能源环保股份有限公司 | High-purity liquid carbon dioxide purification device |
| CN117387311B (en) * | 2023-09-22 | 2024-06-04 | 华东能源环保股份有限公司 | High-purity liquid carbon dioxide purification device |
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