CN103626178A - Method and device used for purifying carbon dioxide - Google Patents
Method and device used for purifying carbon dioxide Download PDFInfo
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- CN103626178A CN103626178A CN201310457398.7A CN201310457398A CN103626178A CN 103626178 A CN103626178 A CN 103626178A CN 201310457398 A CN201310457398 A CN 201310457398A CN 103626178 A CN103626178 A CN 103626178A
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Abstract
The invention discloses a method and a device used for purifying carbon dioxide, belonging to the technical field of a gas purifying device. The method comprises the following steps of: enabling a carbon dioxide gas containing impurities to pass through a dehydrating layer (7), a debenzolization layer (8) and a dealkylation layer (9) from top to bottom in sequence, thus removing water, benzene and hydrocarbon in carbon dioxide. The method disclosed by the invention has the beneficial effect that the gas passes through three adsorption layers which are the dehydrating layer, the debenzolization layer and the dealkylation layer, adsorption device and process route are optimized, the cost is lowered, operation temperature is low and controllability is improved. Moreover, the device disclosed by the invention is suitable for large-scale industrial popularization and production without being electrically heated.
Description
Technical field
The present invention relates to a kind of gaseous impurities purifying method, belong to gas-cleaning installation technical field, specifically a kind of method and apparatus for purification of carbon dioxide.
Background technology
Carbonic acid gas is compound common in air, and its molecular formula is CO, by two Sauerstoffatoms and a carbon atom, by covalent linkage, be formed by connecting, and under normal temperature, be a kind of colorless and odorless gas, density ratio air is bigger, is considered to cause the main source of Greenhouse effect; It can be water-soluble, reacts generate carbonic acid with water; Solid carbon dioxide is commonly called as dry ice.In certain limit, the concentration of carbonic acid gas is higher, and the photosynthesis of plant is also stronger, so carbonic acid gas can be fertile as a kind of gas; Can also for the shelf time of extending goods, guarantee taste and quality as a kind of natural fungi-proofing material, reduce natural or artificial preservative's use; Carbonic acid gas also can replace acid that corrodibility is strong for alkalescence and technique, and more safer than sulfate system, more economical, controllability is stronger; And because carbon dioxide corrosion is low, easily process and store, conventionally in welding, being used as protection gas, in gas shielded arc welding welding technique, can prevent the pollution of atmosphere to the weld metal of fusing; Carbonic acid gas is used in many different application in paper mill at present, and object is to reduce cost and reclaims valuable chemical, and it is effectively with carbonic acid gas, replacing the ink of vitriolization screening stage; Under ultracritical state (31.1 ℃, 7.38MPa), carbonic acid gas becomes general solvent, replaces fluorochlorohydrocarbon for equipment washing; After the acceleration of the compressed air of carbonic acid gas dry ice particle, can be used in cleaning, the non-conductive cleaning for electric component that can safety of carbonic acid gas, in addition, it can wear equipment, do not explode and do not burn; Can also be for flame-out and do not damage or polluting material, therefore, anhydrous, can not water or the efficiency that fire-fights by water not high in the situation that, with it, put out a fire.
Carbonic acid gas is normally produced by burning organic compound, the respiration of cell, the institutes such as fermentative action of microorganism, plant draws carbonic acid gas in the situation that having sunlight, in its chloroplast(id), carry out photosynthesis, produce carbohydrate and oxygen, oxygen can carry out respiration for other biological, this circulation be called carbon cycle (
carbon cycle).Carbonic acid gas is one of greenhouse gases, it allows visible ray freely to pass through, but can absorb infrared rays and ultraviolet ray, this can be the heat energy from the sun under lock and key, do not allow it run off, if the carbon dioxide content in atmosphere is too much, the more difficult loss of heat, the temperature on average of the earth also can rise thereupon, and this situation is called Greenhouse effect.
High-purity carbon dioxide production process is a typical recycling economy, comprehensive utilization of resources project; It is an environmental protection project that reduces greenhouse gas emission, increases " three wastes " comprehensive utilization of resources of benefiting the nation and the people of economic benefit, social benefit; In its production process, water, hydrocarbon, benzene are three main detrimental impurity that affect quality product, prior art scheme is to treat the selected different sorbent material of different impurity components, is completed respectively: dehydration is to use by two drying tower cyclic regenerations by one or more equipment; The de-benzene of de-hydrocarbon completes in same unit, at least needs four equipment: an air compressor machine, a de-hydrocarbon tower, a heat exchanger, a water cooler, and need oxygenation, under high temperature and catalyst action, carry out chemical reaction.Visible, realize removing of these three kinds of impurity, prior art generally at least needs 6 equipment, so exists in prior art: use equipment is many, and floor space is large, also need electrically heated in production process, expensive catalyzer, and all factors cause production cost high; And operational path is long, control parameter strict, operation and dimension maintenance difficulty are large.
Summary of the invention
The object of the invention is to produce a kind of equipment of Purge gas, it is high that this equipment can solve conventional purification apparatus production cost, and the drawback that operational path is loaded down with trivial details proposes a kind of method and apparatus for purification of carbon dioxide.
For achieving the above object, a kind of method for purification of carbon dioxide of the present invention, passes through the carbon dioxide that contains impurity after dehydration, de-benzene, de-hydrocarbon the water in carbon dioxide removal, benzene, hydrocarbon successively.
Described dehydration adopts activated alumina to carry out, and it has stronger avidity to water, is a kind of minor amount of water to be carried out to the sorbent material that depth drying is used; Described de-benzene adopts gac to carry out, and a lot of pore structures are contained in its inside, have excellent adsorptive power; Described de-hydrocarbon adopts silica gel to carry out, and is a kind of solid particulate of hard, vesicular structure, for the separation of high-carbon hydrocarbon component.
A kind of equipment for purification of carbon dioxide of the present invention, comprises equipment barrel, gas inlet pipeline, pneumatic outlet pipeline, it is characterized in that: described equipment barrel top is provided with gas inlet pipeline, and equipment barrel bottom is provided with pneumatic outlet pipeline; The interior adsorbent layer of filling of described equipment barrel is divided into dehydration layer, de-benzene layer, takes off three layers, hydrocarbon layer.
In use, the carbon dioxide that contains impurity is entered by gas inlet pipeline a kind of equipment for purification of carbon dioxide of the present invention, and gas successively by dehydration layer, de-benzene layer, de-hydrocarbon layer, is discharged by pneumatic outlet pipeline from top to down.
In described equipment barrel, fill adsorbent layer and separated by screen, equipment barrel and screen removably connect, replacing for convenience detach; The height of equipment barrel is 2800～3000mm; The wall thickness of equipment barrel is 12mm, can bear the pressure of gas access arrangement cylindrical shell.
Three layers, described dehydration layer, de-benzene layer, de-hydrocarbon layer are respectively provided with a manhole, to facilitate the replacing of sorbent material.
Pipeline gentle body outlet conduit in described gas inlet is provided with the woven wire that can dismantle, and layer number of mesh has 1 layer at least; The aperture of woven wire is that 80 orders not only can hinder the fine dusts particle that grade last process is carried secretly, and the impact to adsorbent layer can also mitigation of gases inlet duct pressure causing, avoids smashing absorbent particles, keeps the surface-stable of sorbent material.
Described layer number of mesh is 2 layers.
The material of described Whole Equipment is prepared from by Steel Type Q235-A.
Described gas inlet pipeline is located at equipment top, and pneumatic outlet pipeline is located at bottom; Due to purification of carbon dioxide of the present invention, according to its characteristic, the density ratio air of carbonic acid gas is large, under the normal conditions, the density of carbonic acid gas is 1.977g/L, is approximately 1.5 times of air, and the high-purity carbon dioxide gas of therefore collecting when through equipment barrel 2 is abundanter.
A kind of equipment for purification of carbon dioxide of the present invention, its principle of work is: in chemical industry operation, fractionation by adsorption is a kind of new technique for separating of gaseous mixture, this is the major technique that adopts during high-purity carbon dioxide is produced, and adopts respectively three kinds of sorbent materials to carry out the preparation of high-purity carbon dioxide; Three kinds of sorbent material loader program upper stratas are dehydrated adsorbent, because moisture content can affect the performance of the function of other sorbent material; Middle dress benzene sorbent material, because benzene can affect the silica gel adsorption ability in hydrocarbon adsorbent; Basecoat is hydrocarbon adsorbent.Gas from above successively by these three kinds of adsorbent layers, to remove the impurity such as water in carbonic acid gas, benzene, hydrocarbon.
A kind of method for purification of carbon dioxide of the present invention, its working process is: the carbon dioxide that contains impurity is entered by gas inlet pipeline, woven wire is equipped with in lower end at gas inlet pipeline, not only can hinder the fine dusts particle that grade last process is carried secretly, the impact to adsorbent layer can also mitigation of gases inlet duct pressure causing, avoid smashing absorbent particles, keep the surface-stable of sorbent material; Gas removes after corresponding impurity by dehydration layer, de-benzene layer, de-three kinds of adsorbent layer of hydrocarbon layer from top to down successively, by pneumatic outlet pipeline device for transferring; The pneumatic outlet pipeline first half, equally with entrance is also equipped with two-layer woven wire, can hinder a small amount of sorbent material fine particle that grade gas is entrained with in adsorption process, prevents that it from bringing next procedure into.
A kind of method and apparatus for purification of carbon dioxide of the present invention, its beneficial effect is: in present device, by dehydration, de-benzene, de-hydrocarbon layering, three kinds of sorbent materials are installed, are implemented to have the effect that removes three kinds of impurity simultaneously; Propose the method and apparatus for impurity high-efficient purification, make the present invention have equipment simple, service temperature is low, and use equipment is few, and the expenses such as equipment and the maintenance of related accessories dimension, periodic vertification decline, and production cost reduces; Also, because equipment of the present invention does not need electrically heated, do not need expensive catalyzer yet, and changed absorbing process, shortened operational path, can handlingly improve, be applicable to batch production and promote production.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below the accompanying drawing of required use during embodiment is described is briefly described, accompanying drawing in the following describes is only one of them embodiment of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the embodiment of the present invention, and wherein parts are as follows: 1-elipse head, 2-equipment barrel, 3-gas inlet pipeline, 4-pneumatic outlet pipeline, 5-woven wire, 6-screen, 7-dehydration layer, the de-benzene layer of 8-, the de-hydrocarbon layer of 9-, 10-manhole.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only one of them embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
As shown in drawings, a kind of equipment for purification of carbon dioxide, comprises primary device cylindrical shell 2, gas inlet pipeline 3, pneumatic outlet pipeline 4; Described equipment barrel 2 comprises the elipse head 1 that is positioned at cylindrical shell two ends, and gas inlet pipeline 3 is located at equipment top, and pneumatic outlet pipeline 4 is located at bottom, is equipped with woven wire 5 in the pipe of gangway; Equipment barrel 2 use screens 6 are divided into dehydration layer 7, de-benzene layer 8,9 three region of de-hydrocarbon layer, place separately different sorbent materials, and dehydration layer 7, de-benzene layer 8, de-hydrocarbon layer 9 are respectively arranged with a manhole 10, to facilitate the replacing of sorbent material; The height overall of described equipment barrel 2 is 2800mm; Equipment barrel 2 thickness are 12mm.
In use, the carbon dioxide that contains impurity is entered by gas inlet pipeline 3, in the lower end of gas inlet pipeline 3, woven wire 5 is housed, can hinder first the fine dusts particle that grade last process is carried secretly, second the impact to adsorbent layer can mitigation of gases inlet duct pressure causing, avoid smashing absorbent particles, keep the surface-stable of sorbent material; Gas removes after corresponding impurity by dehydration layer 7, de-benzene layer 8, de-9 three kinds of adsorbent layer of hydrocarbon layer from top to down successively, by pneumatic outlet pipeline 4 device for transferring, dehydration layer 7 sorbent material main component used are activated aluminas, it has stronger avidity to water, is a kind of minor amount of water to be carried out to the sorbent material that depth drying is used; De-benzene layer 8 sorbent material main component used is gac, and a lot of pore structures are contained in its inside, have excellent adsorptive power; De-hydrocarbon layer 9 sorbent material main component used is silica gel, is a kind of solid particulate of hard, vesicular structure, for the separation of high-carbon hydrocarbon component; Pneumatic outlet pipeline 4 first halves, equally with entrance are also equipped with two-layer woven wire 5, can hinder a small amount of sorbent material fine particle that grade gas is entrained with in adsorption process, prevent that it from bringing next procedure into.
As shown in drawings, a kind of equipment for purification of carbon dioxide, comprises primary device cylindrical shell 2, gas inlet pipeline 3, pneumatic outlet pipeline 4; Described equipment barrel 2 comprises the elipse head 1 that is positioned at cylindrical shell two ends, and gas inlet pipeline 3 is located at equipment top, and pneumatic outlet pipeline 4 is located at bottom, is equipped with woven wire 5 in the pipe of gangway; Equipment barrel 2 use screens 6 are divided into dehydration layer 7, de-benzene layer 8,9 three region of de-hydrocarbon layer, place separately different sorbent materials, and dehydration layer 7, de-benzene layer 8, de-hydrocarbon layer 9 are respectively arranged with a manhole 10, to facilitate the replacing of sorbent material; The height overall of described equipment barrel 2 is 2900mm; Equipment barrel 2 thickness are 12mm.
In use, the carbon dioxide that contains impurity is entered by gas inlet pipeline 3, in the lower end of gas inlet pipeline 3, woven wire 5 is housed, can hinder first the fine dusts particle that grade last process is carried secretly, second the impact to adsorbent layer can mitigation of gases inlet duct pressure causing, avoid smashing absorbent particles, keep the surface-stable of sorbent material; Gas removes after corresponding impurity by dehydration layer 7, de-benzene layer 8, de-9 three kinds of adsorbent layer of hydrocarbon layer from top to down successively, by pneumatic outlet pipeline 4 device for transferring, dehydration layer 7 sorbent material main component used are activated aluminas, it has stronger avidity to water, is a kind of minor amount of water to be carried out to the sorbent material that depth drying is used; De-benzene layer 8 sorbent material main component used is gac, and a lot of pore structures are contained in its inside, have excellent adsorptive power; De-hydrocarbon layer 9 sorbent material main component used is silica gel, is a kind of solid particulate of hard, vesicular structure, for the separation of high-carbon hydrocarbon component; Pneumatic outlet pipeline 4 first halves, equally with entrance are also equipped with two-layer woven wire 5, make high-purity carbon dioxide gas.
As shown in drawings, a kind of equipment for purification of carbon dioxide, comprises primary device cylindrical shell 2, gas inlet pipeline 3, pneumatic outlet pipeline 4; Described equipment barrel 2 comprises the elipse head 1 that is positioned at cylindrical shell two ends, and gas inlet pipeline 3 is located at equipment top, and pneumatic outlet pipeline 4 is located at bottom, is equipped with woven wire 5 in the pipe of gangway; Equipment barrel 2 use screens 6 are divided into dehydration layer 7, de-benzene layer 8,9 three region of de-hydrocarbon layer, place separately different sorbent materials, and dehydration layer 7, de-benzene layer 8, de-hydrocarbon layer 9 are respectively arranged with a manhole 10, to facilitate the replacing of sorbent material; The height overall of described equipment barrel 2 is 3000mm; Equipment barrel 2 thickness are 12mm.
In use, the carbon dioxide that contains impurity is entered by gas inlet pipeline 3, in the lower end of gas inlet pipeline 3, woven wire 5 is housed, can hinder first the fine dusts particle that grade last process is carried secretly, second the impact to adsorbent layer can mitigation of gases inlet duct pressure causing, avoid smashing absorbent particles, keep the surface-stable of sorbent material; Gas removes after corresponding impurity by dehydration layer 7, de-benzene layer 8, de-9 three kinds of adsorbent layer of hydrocarbon layer from top to down successively, by pneumatic outlet pipeline 4 device for transferring, dehydration layer 7 sorbent material main component used are activated aluminas, it has stronger avidity to water, is a kind of minor amount of water to be carried out to the sorbent material that depth drying is used; De-benzene layer 8 sorbent material main component used is gac, and a lot of pore structures are contained in its inside, have excellent adsorptive power; De-hydrocarbon layer 9 sorbent material main component used is silica gel, is a kind of solid particulate of hard, vesicular structure, for the separation of high-carbon hydrocarbon component; Pneumatic outlet pipeline 4 first halves, equally with entrance are also equipped with two-layer woven wire 5, make high-purity carbon dioxide gas.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. for a method for purification of carbon dioxide, it is characterized in that: the carbon dioxide that contains impurity, successively by dehydration, de-benzene, de-hydrocarbon, is removed to water, benzene, hydrocarbon in carbonic acid gas.
2. a kind of method for purification of carbon dioxide as claimed in claim 1, is characterized in that: described dehydration adopts activated alumina to carry out; Described de-benzene adopts gac to carry out; Described de-hydrocarbon adopts silica gel to carry out.
One kind based on described in claim 1 or 2 for the equipment of purification of carbon dioxide, comprise equipment barrel (2), gas inlet pipeline (3), pneumatic outlet pipeline (4), it is characterized in that: described equipment barrel (2) top is provided with gas inlet pipeline (3), equipment barrel (2) bottom is provided with pneumatic outlet pipeline (4); In described equipment barrel (2), fill adsorbent layer and be divided into (9) three layers, dewater layer (7), de-benzene layer (8), de-hydrocarbon layer.
4. a kind of equipment for purification of carbon dioxide as claimed in claim 3, it is characterized in that: in described equipment barrel (2), fill adsorbent layer and separated by screen (6), equipment barrel (2) removably connects with screen (6), the height of equipment barrel (2) is 2800～3000mm, and the wall thickness of equipment barrel (2) is 12mm.
5. a kind of equipment for purification of carbon dioxide as claimed in claim 3, is characterized in that: (9) three layers, described dehydration layer (7), de-benzene layer (8), de-hydrocarbon layer are respectively provided with a manhole (10).
6. a kind of equipment for purification of carbon dioxide as claimed in claim 3, is characterized in that: described gas inlet pipeline (3) and gas outlet conduit (4) are provided with the woven wire (5) that can dismantle, and woven wire (5) number of plies has 1 layer at least; The aperture of woven wire (5) is 80 orders.
7. a kind of equipment for purification of carbon dioxide as claimed in claim 3, is characterized in that: described woven wire (5) number of plies is 2 layers.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310457398.7A CN103626178A (en) | 2013-09-30 | 2013-09-30 | Method and device used for purifying carbon dioxide |
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| CN201310457398.7A CN103626178A (en) | 2013-09-30 | 2013-09-30 | Method and device used for purifying carbon dioxide |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1248482A (en) * | 1999-08-30 | 2000-03-29 | 伍仁兴 | Pressure variable adsorptive method for separating hydrogen nitrogen and pure carbon dioxide from exchange air |
| CN201684526U (en) * | 2009-11-27 | 2010-12-29 | 胜利油田胜利勘察设计研究院有限公司 | CO2 drying device |
| CN102083512A (en) * | 2008-04-06 | 2011-06-01 | 英诺斯瑞有限责任公司 | Carbon dioxide recovery |
-
2013
- 2013-09-30 CN CN201310457398.7A patent/CN103626178A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1248482A (en) * | 1999-08-30 | 2000-03-29 | 伍仁兴 | Pressure variable adsorptive method for separating hydrogen nitrogen and pure carbon dioxide from exchange air |
| CN102083512A (en) * | 2008-04-06 | 2011-06-01 | 英诺斯瑞有限责任公司 | Carbon dioxide recovery |
| CN201684526U (en) * | 2009-11-27 | 2010-12-29 | 胜利油田胜利勘察设计研究院有限公司 | CO2 drying device |
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Application publication date: 20140312 |
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