CN210874819U - Device for controlling carbon dioxide content at inlet of air separation plant and air separation plant - Google Patents
Device for controlling carbon dioxide content at inlet of air separation plant and air separation plant Download PDFInfo
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- CN210874819U CN210874819U CN201921164012.2U CN201921164012U CN210874819U CN 210874819 U CN210874819 U CN 210874819U CN 201921164012 U CN201921164012 U CN 201921164012U CN 210874819 U CN210874819 U CN 210874819U
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04163—Hot end purification of the feed air
- F25J3/04169—Hot end purification of the feed air by adsorption of the impurities
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04775—Air purification and pre-cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
- F25J2205/32—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as direct contact cooling tower to produce a cooled gas stream, e.g. direct contact after cooler [DCAC]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2205/00—Processes or apparatus using other separation and/or other processing means
- F25J2205/60—Processes or apparatus using other separation and/or other processing means using adsorption on solid adsorbents, e.g. by temperature-swing adsorption [TSA] at the hot or cold end
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2210/00—Processes characterised by the type or other details of the feed stream
- F25J2210/06—Splitting of the feed stream, e.g. for treating or cooling in different ways
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2220/00—Processes or apparatus involving steps for the removal of impurities
- F25J2220/40—Separating high boiling, i.e. less volatile components from air, e.g. CO2, hydrocarbons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/40—Processes or apparatus involving steps for recycling of process streams the recycled stream being air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The utility model relates to the field of air separation devices, and discloses a device for controlling the content of carbon dioxide at an inlet of an air separation device and the air separation device, wherein the device comprises an air cooling tower, a carbon dioxide monitoring unit, a first valve, a second valve, a third valve, a carbon dioxide absorption unit and a purification system; the outlet of the air cooling tower is communicated with the carbon dioxide monitoring unit through a pipeline and is respectively connected with the carbon dioxide absorption unit and the purification system through a first valve and a second valve; the carbon dioxide absorption unit is connected with the purification system through a third valve; the carbon dioxide monitoring unit is used for monitoring the concentration of carbon dioxide at the outlet of the air cooling tower and controlling the states of the first valve, the second valve and the third valve. The device can control the concentration of carbon dioxide entering the air separation device, and avoids the increase of the load of the air separation device and the reduction of the service life of the molecular sieve in the purification system caused by the fluctuation of the concentration of the carbon dioxide.
Description
Technical Field
The utility model relates to an air separation plant, concretely relates to device of control air separation plant entry carbon dioxide content.
Background
With the rapid development of industries such as petrochemical industry, emerging coal chemical industry, metallurgical industry and the like, air separation projects matched with newly-built large-scale production devices are also successively built and put into production, and the matched air separation projects are more and more advanced in technology and larger in scale. After the air separation unit is built or built and put into operation, other surrounding projects are put into operation successively, so that the environment of the air suction inlet of the air separation unit is changed compared with the original design, and the most fatal phenomenon is that the carbon dioxide in the air of the air suction inlet of the air separation unit exceeds the original design standard, and the stable production operation of each process device in the whole production field is influenced.
Generally, a cryogenic separation method is adopted in a large air separation device, the requirement on the content of partial components in raw air is extremely high, particularly the excessive content of carbon dioxide in the raw air is extremely sensitive, and the regeneration time of a molecular sieve at a purification system is prolonged by a common process treatment measure, so that the service life of the molecular sieve is shortened, the load of the device is forced to be reduced, and the material consumption (waste nitrogen and heating steam) is increased. If the purification system does not reduce the carbon dioxide content in time, the tray, pipe and equipment will be blocked due to the nature of the carbon dioxide (dry ice) during the cryogenic process.
Meanwhile, the carbon dioxide cryogenic cold frost is porous particles, the structure of the carbon dioxide cryogenic cold frost is similar to that of a molecular sieve, hydrocarbon is easy to enrich, and once the carbon dioxide cryogenic particles rich in the hydrocarbon are collided, the carbon dioxide cryogenic particles are easy to explode, so that equipment damage, device parking and even casualties are caused.
Disclosure of Invention
The utility model aims at overcoming the air separation plant that prior art exists because the air separation plant system that the carbon dioxide concentration exceeds standard and leads to reduces load, energy consumption height, and the problem that molecular sieve life-span is low among the air separation plant system, provides a device of control air separation plant entry carbon dioxide content, and the device can realize having the carbon dioxide concentration that makes corresponding control get into air separation plant, is showing and is reducing excessive carbon dioxide to air separation plant's adverse effect.
In order to achieve the above object, the present invention provides, in a first aspect, an apparatus for controlling the carbon dioxide content at the inlet of an air separation plant, wherein the apparatus comprises an air cooling tower 1, a carbon dioxide monitoring unit 2, a first valve 3, a second valve 4, a third valve 5, a carbon dioxide absorption unit 6, and a purification system 7;
the outlet of the air cooling tower 1 is communicated with a carbon dioxide monitoring unit 2 through a pipeline and is respectively connected with a carbon dioxide absorption unit 6 and a purification system 7 through a first valve 3 and a second valve 4;
the carbon dioxide absorption unit 6 is connected with a purification system 7 through a pipeline and a third valve 5;
the carbon dioxide monitoring unit 2 is used for monitoring the concentration of carbon dioxide at the outlet of the air cooling tower 1 and controlling the states of the first valve 3, the second valve 4 and the third valve 5.
Preferably, the carbon dioxide absorption unit 6 is provided with a carbon dioxide adsorbent, and the purification system 7 is provided with a molecular sieve.
Preferably, the carbon dioxide adsorbent is at least one of flake sodium hydroxide, granular sodium hydroxide, flake potassium hydroxide, granular potassium hydroxide and granular calcium hydroxide.
Preferably, the device has an operating state one: the second valve 4 is in a closed state, the first valve 3 and the third valve 5 are in an open state, and the first valve 3, the carbon dioxide absorption unit 6, the third valve 5 and the purification system 7 are communicated, so that the gas with the carbon dioxide concentration exceeding 500ppm detected by the carbon dioxide monitoring unit 2 enters the carbon dioxide absorption unit 6 and enters the purification system 7 through the third valve 5.
Preferably, the device has a second operating state: the first valve 3, the second valve 4 and the third valve 5 are in an open state, the first valve 3, the carbon dioxide absorption unit 6, the third valve 5 are communicated with the purification system 7, the second valve 4 is communicated with the purification system 7, so that the gas with the carbon dioxide concentration of 200 and 500ppm monitored by the carbon dioxide monitoring unit 2 enters the carbon dioxide absorption unit 6, enters the purification system 7 through the third valve 5, and enters the purification system 7 through the second valve.
Preferably, the opening degrees of the first valve 3 and the second valve 4 are set so that the gas flow rate ratio through the first valve 3 and the second valve 4 is (2-5): 1.
Preferably, the device has a working state three: the first valve 3 and the third valve 5 are in a closed state, the second valve 4 is controlled to be in an open state, and the second valve 4 is communicated with the purification system 7, so that the gas with the carbon dioxide concentration lower than 200ppm detected by the carbon dioxide monitoring unit 2 enters the purification system 7 through the second valve 4.
Preferably, the first valve 3, the second valve 4 and the third valve 5 are each independently at least one of a butterfly valve, a ball valve, a gate valve and a check valve.
Preferably, the carbon dioxide absorbing unit 6 is a fixed bed and/or a fluidized bed.
The utility model discloses the second aspect provides an air separation plant, a serial communication port, contain in the air separation plant the device of control air separation plant entry carbon dioxide content.
Through the technical scheme, the utility model provides a control air separation plant entry carbon dioxide content's device, the device obtains following profitable effect:
the utility model provides an introduce carbon dioxide monitor cell and carbon dioxide absorption unit in the device for the device can control the carbon dioxide concentration who gets into air separation plant, is showing the fluctuation that reduces carbon dioxide concentration and is showing the life-span influence of reducing the fluctuation of carbon dioxide concentration to follow-up to air separation plant stability, especially reducing the molecular sieve in the air separation plant, is showing the load that reduces the air separation plant system, improves the life-span that the molecule is few.
Drawings
FIG. 1 is a schematic view of the alkali adsorption tank of the fixed bed of the present invention.
Description of the reference numerals
1 air cooling tower 2 carbon dioxide monitoring unit
3 first valve 4 second valve
5 third valve 6 carbon dioxide absorption unit
7 purification system
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
The utility model discloses a first aspect provides a device of control air separation plant entry carbon dioxide content, its characterized in that, the device includes air cooling tower 1, carbon dioxide monitor cell 2, first valve 3, second valve 4, third valve 5, carbon dioxide absorption unit 6 and purification system 7;
the outlet of the air cooling tower 1 is communicated with a carbon dioxide monitoring unit 2 through a pipeline and is respectively connected with a carbon dioxide absorption unit 6 and a purification system 7 through a first valve 3 and a second valve 4;
the carbon dioxide absorption unit 6 is connected with a purification system 7 through a pipeline and a third valve 5;
the carbon dioxide monitoring unit 2 is used for monitoring the concentration of carbon dioxide at the outlet of the air cooling tower 1 and controlling the states of the first valve 3, the second valve 4 and the third valve 5.
According to the utility model discloses, be provided with the carbon dioxide adsorbent in carbon dioxide absorption unit 6, be provided with the molecular sieve adsorbent in purification system 7.
According to the utility model, the carbon dioxide adsorbent is at least one of flake sodium hydroxide, granular sodium hydroxide, flake potassium hydroxide, granular device potassium hydroxide and granular calcium hydroxide.
According to the utility model discloses, the device has operating condition one: the second valve 4 is in a closed state, the first valve 3 and the third valve 5 are in an open state, and the first valve 3, the carbon dioxide absorption unit 6, the third valve 5 and the purification system 7 are communicated, so that the gas with the carbon dioxide concentration exceeding 500ppm detected by the carbon dioxide monitoring unit 2 enters the carbon dioxide absorption unit 6 and enters the purification system 7 through the third valve 5.
According to the utility model discloses, the device has operating condition two: the first valve 3, the second valve 4 and the third valve 5 are in an open state, the first valve 3, the carbon dioxide absorption unit 6, the third valve 5 are communicated with the purification system 7, the second valve 4 is communicated with the purification system 7, so that the gas with the carbon dioxide concentration of 200 and 500ppm monitored by the carbon dioxide monitoring unit 2 enters the carbon dioxide absorption unit 6 and enters the purification system 7 through the third valve 5, and the gas enters the purification system 7 through the second valve.
According to the present invention, the opening degrees of the first valve 3 and the second valve 4 are set so that the ratio of the gas flow rate through the first valve 3 to the gas flow rate through the second valve 4 is (2-5): 1.
According to the utility model discloses, the device has operating condition three: the first valve 3 and the third valve 5 are in a closed state, the second valve 4 is controlled to be in an open state, and the second valve 4 is communicated with the purification system 7, so that the gas with the carbon dioxide concentration lower than 200ppm detected by the carbon dioxide monitoring unit 2 enters the purification system 7 through the second valve 4.
According to the utility model discloses, first valve 3, second valve 4, third valve 5 are at least one kind in butterfly valve, ball valve, gate valve and the check valve independently separately.
The utility model discloses in, third valve 5 is the check valve, and first valve 3, second valve 4 are at least one kind in butterfly valve, ball valve and the gate valve.
The utility model discloses in, carbon dioxide monitoring unit 2 is carbon dioxide on-line analyzer.
According to the present invention, the carbon dioxide absorption unit 6 is a fixed bed and/or a fluidized bed.
The utility model discloses the second aspect provides an air separation plant, a serial communication port, air separation plant contains the device of control air separation plant entry carbon dioxide content.
The following description of the invention refers to fig. 1.
As shown in fig. 1, the apparatus for controlling the content of carbon dioxide at the inlet of an air separation plant of the present invention comprises an air cooling tower 1, a carbon dioxide monitoring unit 2, a first valve 3, a second valve 4, a third valve 5, a carbon dioxide absorption unit 6 and a purification system 7;
the outlet of the air cooling tower 1 is communicated with a carbon dioxide monitoring unit 2 through a pipeline and is respectively connected with a carbon dioxide absorption unit 6 and a purification system 7 through a first valve 3 and a second valve 4;
the carbon dioxide absorption unit 6 is connected with a purification system 7 through a pipeline and a third valve 5;
the carbon dioxide monitoring unit 2 is used for monitoring the concentration of carbon dioxide at the outlet of the air cooling tower 1.
The carbon dioxide absorption unit 6 is a fixed bed, a carbon dioxide adsorbent is arranged in the fixed bed, the first valve 3, the second valve 4 and the third valve 5 are all butterfly valves, and a molecular sieve adsorbent is arranged in the purification system 7.
The device has a working state one: the second valve 4 is in a closed state, the first valve 3 and the third valve 5 are in an open state, and the first valve 3, the carbon dioxide absorption unit 6, the third valve 5 and the purification system 7 are communicated, so that the gas with the carbon dioxide concentration exceeding 500ppm detected by the carbon dioxide monitoring unit 2 enters the carbon dioxide absorption unit 6 and enters the purification system 7 through the third valve 5.
Another embodiment of the present invention is described with reference to fig. 1 of the specification.
As shown in fig. 1, the apparatus for controlling the content of carbon dioxide at the inlet of an air separation plant of the present invention comprises an air cooling tower 1, a carbon dioxide monitoring unit 2, a first valve 3, a second valve 4, a third valve 5, a carbon dioxide absorption unit 6 and a purification system 7;
the outlet of the air cooling tower 1 is communicated with a carbon dioxide monitoring unit 2 through a pipeline and is respectively connected with a carbon dioxide absorption unit 6 and a purification system 7 through a first valve 3 and a second valve 4;
the carbon dioxide absorption unit 6 is connected with a purification system 7 through a pipeline and a third valve 5;
the carbon dioxide monitoring unit 2 is used for monitoring the concentration of carbon dioxide at the outlet of the air cooling tower 1.
Wherein, the carbon dioxide absorption unit 6 is a fluidized bed in which a carbon dioxide adsorbent is arranged, the first valve 3, the second valve 4 and the third valve 5 are all butterfly valves, and the purification system 7 is provided with a molecular sieve adsorbent.
The device has a second operating state: the first valve 3, the second valve 4 and the third valve 5 are in an open state, the first valve 3, the carbon dioxide absorption unit 6, the third valve 5 are communicated with the purification system 7, the second valve 4 is communicated with the purification system 7, so that the gas with the carbon dioxide concentration of 200 and 500ppm monitored by the carbon dioxide monitoring unit 2 enters the carbon dioxide absorption unit 6, enters the purification system 7 through the third valve 5, and enters the purification system 7 through the second valve.
The opening degrees of the first valve 3 and the second valve 4 are set so that the gas flow rate ratio through the first valve 3 and the second valve 4 is (2-5): 1.
Another embodiment of the present invention is described with reference to fig. 1 of the specification.
As shown in fig. 1, the apparatus for controlling the content of carbon dioxide at the inlet of an air separation plant of the present invention comprises an air cooling tower 1, a carbon dioxide monitoring unit 2, a first valve 3, a second valve 4, a third valve 5, a carbon dioxide absorption unit 6 and a purification system 7;
the outlet of the air cooling tower 1 is communicated with a carbon dioxide monitoring unit 2 through a pipeline and is respectively connected with a carbon dioxide absorption unit 6 and a purification system 7 through a first valve 3 and a second valve 4;
the carbon dioxide absorption unit 6 is connected with a purification system 7 through a pipeline and a third valve 5;
the carbon dioxide monitoring unit 2 is used for monitoring the concentration of carbon dioxide at the outlet of the air cooling tower 1.
The carbon dioxide absorption unit 6 is a fixed bed, a carbon dioxide adsorbent is arranged in the fixed bed, the first valve 3 and the second valve 4 are butterfly valves, the third valve 5 is a one-way valve, and a molecular sieve adsorbent is arranged in the purification system 7.
The device has a third operating state: the first valve 3 and the third valve 5 are in a closed state, the second valve 4 is controlled to be in an open state, and the second valve 4 is communicated with the purification system 7, so that the gas with the carbon dioxide concentration lower than 200ppm detected by the carbon dioxide monitoring unit 2 enters the purification system 7 through the second valve 4.
The present invention will be described in detail below by way of examples.
Example 1
As shown in fig. 1, the apparatus for controlling the content of carbon dioxide at the inlet of an air separation plant of the present invention comprises an air cooling tower 1, a carbon dioxide monitoring unit 2, a first valve 3, a second valve 4, a third valve 5, a carbon dioxide absorption unit 6 and a purification system 7;
the outlet of the air cooling tower 1 is communicated with a carbon dioxide monitoring unit 2 through a pipeline and is respectively connected with a carbon dioxide absorption unit 6 and a purification system 7 through a first valve 3 and a second valve 4;
the carbon dioxide absorption unit 6 is connected with a purification system 7 through a pipeline and a third valve 5;
the carbon dioxide monitoring unit 2 is used for monitoring the concentration of carbon dioxide at the outlet of the air cooling tower 1.
The carbon dioxide absorption unit 6 is a fixed bed, a carbon dioxide adsorbent is arranged in the fixed bed, the first valve 3, the second valve 4 are butterfly valves, the third valve 5 are all one-way valves, and a molecular sieve adsorbent is arranged in the purification system.
The device has a working state one: the second valve 4 is in a closed state, the first valve 3 and the third valve 5 are in an open state, and the first valve 3, the carbon dioxide absorption unit 6, the third valve 5 and the purification system 7 are communicated, so that the gas with the carbon dioxide concentration exceeding 500ppm detected by the carbon dioxide monitoring unit 2 enters the carbon dioxide absorption unit 6 and enters the purification system 7 through the third valve 5.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. In the technical idea scope of the present invention, it can be right to the technical solution of the present invention perform multiple simple modifications, including each technical feature combined in any other suitable manner, these simple modifications and combinations should be regarded as the disclosed content of the present invention, and all belong to the protection scope of the present invention.
Claims (7)
1. A device for controlling the content of carbon dioxide at the inlet of an air separation plant is characterized by comprising an air cooling tower (1), a carbon dioxide monitoring unit (2), a first valve (3), a second valve (4), a third valve (5), a carbon dioxide absorption unit (6) and a purification system (7);
an outlet of the air cooling tower (1) is communicated with the carbon dioxide monitoring unit (2) through a pipeline and is respectively connected with the carbon dioxide absorption unit (6) and the purification system (7) through a first valve (3) and a second valve (4);
the carbon dioxide absorption unit (6) is connected with a purification system (7) through a pipeline and a third valve (5);
the carbon dioxide monitoring unit (2) is used for monitoring the concentration of carbon dioxide at the outlet of the air cooling tower (1) and controlling the states of the first valve (3), the second valve (4) and the third valve (5).
2. The apparatus according to claim 1, wherein a carbon dioxide adsorbent is provided in the carbon dioxide absorption unit (6); a molecular sieve adsorbent is arranged in the purification system (7).
3. The apparatus of claim 2 wherein the carbon dioxide adsorbent is at least one of sodium hydroxide flakes, sodium hydroxide particles, potassium hydroxide flakes, potassium hydroxide particles, and calcium hydroxide particles.
4. The device according to claim 1, characterized in that the opening of the first valve (3) and the second valve (4) is set such that the gas flow ratio through the first valve (3) and the second valve (4) is (2-5): 1.
5. The device according to claim 1 or 2, wherein the first valve (3), the second valve (4), and the third valve (5) are each independently at least one of a ball valve, a gate valve, a butterfly valve, and a check valve.
6. The apparatus according to claim 1 or 2, wherein the carbon dioxide absorption unit (6) is a fixed bed and/or a fluidized bed.
7. An air separation plant characterized in that it contains the apparatus for controlling the carbon dioxide content at the inlet of the air separation plant according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921164012.2U CN210874819U (en) | 2019-07-23 | 2019-07-23 | Device for controlling carbon dioxide content at inlet of air separation plant and air separation plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921164012.2U CN210874819U (en) | 2019-07-23 | 2019-07-23 | Device for controlling carbon dioxide content at inlet of air separation plant and air separation plant |
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| CN210874819U true CN210874819U (en) | 2020-06-30 |
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| CN201921164012.2U Active CN210874819U (en) | 2019-07-23 | 2019-07-23 | Device for controlling carbon dioxide content at inlet of air separation plant and air separation plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113322103A (en) * | 2021-05-28 | 2021-08-31 | 安庆市长虹化工有限公司 | Reducing CO at the air separation inlet of a coal gasification plant2Concentration device |
-
2019
- 2019-07-23 CN CN201921164012.2U patent/CN210874819U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113322103A (en) * | 2021-05-28 | 2021-08-31 | 安庆市长虹化工有限公司 | Reducing CO at the air separation inlet of a coal gasification plant2Concentration device |
| CN113322103B (en) * | 2021-05-28 | 2024-03-08 | 安庆长宏科技股份有限公司 | Reducing air separation inlet CO of coal gasification device 2 Concentration device |
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