CN101881566B - Air cooler - Google Patents
Air cooler Download PDFInfo
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- CN101881566B CN101881566B CN2010102052981A CN201010205298A CN101881566B CN 101881566 B CN101881566 B CN 101881566B CN 2010102052981 A CN2010102052981 A CN 2010102052981A CN 201010205298 A CN201010205298 A CN 201010205298A CN 101881566 B CN101881566 B CN 101881566B
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- tube bank
- aerial cooler
- rearmounted
- tube bundle
- preposition
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Abstract
The invention relates to an air cooler, which is provided with a front tube bundle and a rear tube bundle in the entire tube pass material flowing direction, wherein the front tube bundle is connected with the rear tube bundle in series. The front tube bundle and the rear tube bundle of the air cooler are in different working environments and can be made of different materials. Particularly, whenthe air cooler is used for cooling hydrogenated effluent of a hydrocarbon hydrogenation device, flushing water is added on a passage part between the front tube bundle and the rear tube bundle to reduce the convent of water in medium in the front tube bundle, thereby reducing hydrogen sulfide-ammonia-hydrogen-water corrosion formed by the medium in the front tube bundle and improving the heat transfer efficiency of the front tube bundle.
Description
Technical field
The present invention relates to a kind of aerial cooler, on whole tube side stream flow direction, have preposition tube bank and rearmounted tube bank, preposition tube bank is series relationship with rearmounted tube bank.Especially, when aerial cooler of the present invention is used as hydrocarbon hydrogenation device hydrogenation reaction effluent aerial cooler, on the passage component between preposition tube bank and the rearmounted tube bank, flushing water is set and adds inlet.
Background technology
Hydrogenation reaction effluent injects washings, and purpose is the ammonia that absorbs in the hydrogenation reaction effluent, prevents that ammonia concentration is too high; Gather at reaction system, reduce catalyst activity, the ammonia concentration control in the recycle hydrogen is low more good more usually; Generally be not more than 200PPm, preferably be not more than 50PPm; And the inevitable absorbing hydrogen sulphide of the aqueous solution behind the absorption ammonia can prevent that the hydrogenation reaction effluent process that cools from forming sulphur hydrogenation ammonia or heat exchanger channel increase system pressure drop is stopped up in the crystallization of many sulphur ammonia, and this is to use second purpose of washings.
Hydrogenation reaction effluent washings injection rate need satisfy following requirement: washings form vapour phase water and liquid phase water after injecting hydrogenation reaction effluent; The liquid phase water yield must be greater than zero, be preferably the washings total amount 30% or more; To prevent that water from vaporizing entirely, form acid mist in follow-up condensation process.
With regard to hydrocarbon hydrogenation device hydrogenation reaction effluent aerial cooler; Usually operating condition is: pressure is 1.0～22MPa; The tube side inlet temperature is 90～220 ℃ (can reach 250～350 ℃ during the reaction system emergency relief), and the tube side outlet temperature is 30～60 ℃ (can reach 150～250 ℃ during the reaction system emergency relief), hydrogenation reaction effluent contains hydrogen sulfide--ammonia--hydrogen; Usually hydrogenation reaction effluent aerial cooler inlet has added flushing water; And the vaporization rate of the flushing water that adds is generally less than 80%, usually less than 60%, at this moment,--ammonia--hydrogen--the aqueous corrosion environment that formed hydrogen sulfide in the tube bank of hydrogenation reaction effluent aerial cooler.The allocation plan that above-mentioned hydrocarbon hydrogenation device hydrogenation reaction effluent aerial cooler adopts at present is monolithic or the parallelly connected scheme of multi-disc (being generally the even number sheet).
For above-mentioned hydrocarbon hydrogenation device hydrogenation reaction effluent aerial cooler; In most cases; Contain ammonia, hydrogen sulfide, hydrogen in the hydrocarbon hydrogenation device hydrogenation reaction effluent, hydrogenation reaction effluent injects flushing water before getting into aerial cooler usually; Because in most cases; The aerial cooler inlet temperature is higher than the ammonium salt crystallization temperature far away, and the technical scheme of using at present of before aerial cooler tube bank inlet, annotating flushing water causes following harmful or adverse effect to hydrogenation plant hydrogenation reaction effluent aerial cooler:
1. reduce the temperature of " the preposition tube bank of the air cooler of ammonium salt crystallization can not take place " interior medium, reduced heat transfer temperature difference;
2.--ammonia--hydrogen--aqueous corrosion environment has quickened corrosion to make " the preposition tube bank of the air cooler of ammonium salt crystallization can not take place " interior medium form hydrogen sulfide in advance;
3. few to water content in hydrogenation reaction effluent occasion makes medium in " the preposition tube bank of the air cooler of ammonium salt crystallization can not take place "--oil--water three-phase corrosive environment that forms gas in advance, has quickened corrosion;
4. hydrogenation reaction effluent air cooler; When hydrogenation reaction part emergency relief, the tube side gateway temperature difference is bigger, and the thermal expansion elongation that pipe produces is bigger; And the thermal expansion elongation difference that different pipe array of pipes produce is bigger, and therefore the making to equipment proposes higher requirement;
5. existing hydrogenation reaction effluent air cooler; Fore heat exchanger tube zone; Many corrosivity faults take place, and when many corrosivity faults takes place in a large amount of heat exchanger tubes in front portion zone, usually the independent tube bank of full wafer (whole) are extractd from heat exchange process; Make the normal heat exchanger tube at rear portion can't bring into play the heat exchange effect, possibly cause device to reduce treating capacity.If keep the normal process amount; The flow velocity of medium will increase in the air cooler tube bundle in then using; For the less occasion of tube bank number; The flow velocity of medium will increase even be in high corrosion rate flow rates significantly in the air cooler tube bundle in then using, shortens the air cooler tube bundle life-span, threatens the device security of operation.
The problems referred to above, the high occasion of concentration of hydrogen sulfide is more obvious in hydrogenation reaction effluent.
The objective of the invention is to propose a kind of aerial cooler, address the above problem, similar techniques is not appeared in the newspapers.
Summary of the invention
A kind of aerial cooler of the present invention; It is characterized in that: on whole tube side stream flow direction; Have preposition tube bank and rearmounted tube bank; Preposition tube bank is series relationship with rearmounted tube bank, and the tube bank parent tube heat exchange area A of preposition tube bank is 0.1～0.9 with the ratio (A/B) of the tube bank parent tube heat exchange area B of rearmounted tube bank.
Characteristic of the present invention further is: ratio (A/B) is generally 0.15～0.45.
Characteristic of the present invention further is: rearmounted tube bank is provided with flushing water and adds inlet.
Characteristic of the present invention further is: on the passage component between preposition tube bank and the rearmounted tube bank, flushing water is set and adds inlet, preferably flushing water adds on the passage between inlet and rearmounted the tube bank blender is set.
Aerial cooler of the present invention is particularly suitable for hydrocarbon hydrogenation device and uses the hydrogenation reaction effluent aerial cooler, such as using the hydrogenation reaction effluent aerial cooler based on the hydrocarbon hydrogenation device of coal tar.
The specific embodiment
Aerial cooler according to the invention is aerial cooler or Air-cooled Heat Exchanger or the air cooler that commercial plant uses, and is the heat-exchange device that uses air to carry out heat exchange as heat release logistics in cooling medium and the heat exchanger tube.
Aerial cooler according to the invention, the basic element of character are tube bank, blower fan, framework, and accessory is shutter, air duct, ladder, platform and the spray equipment that possibly exist.
Aerial cooler according to the invention, tube bank is made up of heat exchanger tube and bobbin carriage.
A kind of aerial cooler of the present invention is characterized in that: on whole tube side stream flow direction, have preposition tube bank and rearmounted tube bank, preposition tube bank is series relationship with rearmounted tube bank.
Characteristic of the present invention further is: preposition tube bank is arranged in juxtaposition or arranges up and down with rearmounted tube bank.
Characteristic of the present invention further is: preposition tube bank arranges up and down that with rearmounted tube bank preposition tube bank is positioned at the top.
Characteristic of the present invention further is: preposition tube bank and rearmounted tube bank arranged superposed, common preposition tube bank is positioned at the top.
Characteristic of the present invention further is: the tube bank parent tube heat exchange area A of preposition tube bank is generally 0.1～0.9, is generally 0.15～0.45 with the ratio (A/B) of the tube bank parent tube heat exchange area B of rearmounted tube bank.
Characteristic of the present invention further is: rearmounted tube bank is provided with flushing water and adds inlet.
Characteristic of the present invention further is: on the passage component between preposition tube bank and the rearmounted tube bank, flushing water is set and adds inlet, preferably flushing water adds on the passage between inlet and rearmounted the tube bank blender is set.
Aerial cooler of the present invention, except that the tube bank parts, other part is preferably shared.
When aerial cooler of the present invention, preposition tube bank are arranged in juxtaposition with rearmounted tube bank, air duct is set respectively preferably, is convenient to control the stability that air flows in preposition tube bank and the rearmounted tube bank, other part is preferably shared.
Aerial cooler of the present invention is particularly suitable for hydrocarbon hydrogenation device and uses the hydrogenation reaction effluent aerial cooler, such as using the hydrogenation reaction effluent aerial cooler based on the hydrocarbon hydrogenation device of coal tar.
Compare with conventional aerial cooler, aerial cooler advantage of the present invention is:
1. keep the temperature of " the preposition tube bank of the air cooler of ammonium salt crystallization can not take place " interior medium, effectively utilized heat transfer temperature difference;
2.--ammonia--hydrogen--aqueous corrosion environment has slowed down corrosion to avoid " the preposition tube bank of the air cooler of ammonium salt crystallization can not take place " interior medium to form hydrogen sulfide in advance;
3. few to water content in hydrogenation reaction effluent occasion makes " the preposition tube bank of the air cooler of ammonium salt crystallization can not take place " interior medium--oil--water three-phase corrosive environment of avoiding forming in advance gas, has slowed down corrosion;
4. aerial cooler of the present invention, preposition tube bank and rearmounted tube bank can select for use material different to adapt to different media environments easily, can cost saving;
5. hydrogenation reaction effluent air cooler, when hydrogenation reaction part emergency relief, the tube side gateway temperature difference is bigger; The present invention is because of using two tube banks; Reduced the single tube bank tube side gateway temperature difference, therefore reduced the equipment making difficulty, can save cost, improve device security;
6. aerial cooler of the present invention, preposition tube bank is essentially the split relation with rearmounted tube bank, when preposition tube bank is broken down, can from heat exchange process, extract easily, makes rearmounted tube bank continue performance heat exchange effect.Practical operation for ease, preferably be provided with can the requirement of flexible adaptation aforesaid operations pipe-line system.
Claims (12)
1. aerial cooler; It is characterized in that: on whole tube side stream flow direction; Have preposition tube bank and rearmounted tube bank; Preposition tube bank is series relationship with rearmounted tube bank, and the tube bank parent tube heat exchange area A of preposition tube bank is 0.1～0.9 with the ratio (A/B) of the tube bank parent tube heat exchange area B of rearmounted tube bank.
2. aerial cooler according to claim 1 is characterized in that: ratio (A/B) is 0.15～0.45.
3. aerial cooler according to claim 1 and 2 is characterized in that: aerial cooler is the pressure-air cooler.
4. aerial cooler according to claim 1 and 2 is characterized in that: aerial cooler is that hydrocarbon hydrogenation device is used the hydrogenation reaction effluent aerial cooler.
5. aerial cooler according to claim 1 and 2, it is characterized in that: aerial cooler is for to use the hydrogenation reaction effluent aerial cooler based on the hydrocarbon hydrogenation device of coal tar.
6. aerial cooler according to claim 1 and 2 is characterized in that: rearmounted tube bank is provided with flushing water and adds inlet.
7. aerial cooler according to claim 1 and 2 is characterized in that: on the passage component between preposition tube bank and the rearmounted tube bank, flushing water is set and adds inlet.
8. aerial cooler according to claim 4 is characterized in that: rearmounted tube bank is provided with flushing water and adds inlet.
9. aerial cooler according to claim 4 is characterized in that: on the passage component between preposition tube bank and the rearmounted tube bank, flushing water is set and adds inlet.
10. aerial cooler according to claim 5 is characterized in that: rearmounted tube bank is provided with flushing water and adds inlet.
11. aerial cooler according to claim 5 is characterized in that: on the passage component between preposition tube bank and the rearmounted tube bank, flushing water is set and adds inlet.
12. based on claim 1 or 2 described aerial coolers, it is characterized in that: on the passage component between preposition tube bank and the rearmounted tube bank, flushing water is set and adds inlet, flushing water adds on the passage between inlet and rearmounted the tube bank blender is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102052981A CN101881566B (en) | 2010-06-11 | 2010-06-11 | Air cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102052981A CN101881566B (en) | 2010-06-11 | 2010-06-11 | Air cooler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101881566A CN101881566A (en) | 2010-11-10 |
| CN101881566B true CN101881566B (en) | 2012-07-04 |
Family
ID=43053638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102052981A Active CN101881566B (en) | 2010-06-11 | 2010-06-11 | Air cooler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101881566B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201302395Y (en) * | 2008-11-18 | 2009-09-02 | 中国石化扬子石油化工有限公司 | Hydrogenation-reaction outflow tube-bundle system of air cooler for machining chloric raw oil |
| CN101655336A (en) * | 2009-07-27 | 2010-02-24 | 浙江理工大学 | Optimization method of water injection for hydrogenation reaction outflow air-cooler system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1183376A (en) * | 1997-09-10 | 1999-03-26 | Sanden Corp | Manufacture of multitubular heat exchanger |
| JP4300502B2 (en) * | 2000-06-30 | 2009-07-22 | 株式会社ティラド | Parallel flow type heat exchanger for air conditioning |
| JP4213496B2 (en) * | 2003-03-26 | 2009-01-21 | カルソニックカンセイ株式会社 | Heat exchanger |
| FR2856783B1 (en) * | 2003-05-15 | 2006-07-28 | Valeo Thermique Moteur Sa | HEAT EXCHANGER AND HEAT EXCHANGE MODULE COMPRISING SUCH AN EXCHANGER, AND METHOD OF MANUFACTURING SUCH EXCHANGER AND SUCH A MODULE |
-
2010
- 2010-06-11 CN CN2010102052981A patent/CN101881566B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201302395Y (en) * | 2008-11-18 | 2009-09-02 | 中国石化扬子石油化工有限公司 | Hydrogenation-reaction outflow tube-bundle system of air cooler for machining chloric raw oil |
| CN101655336A (en) * | 2009-07-27 | 2010-02-24 | 浙江理工大学 | Optimization method of water injection for hydrogenation reaction outflow air-cooler system |
Non-Patent Citations (5)
| Title |
|---|
| JP特开2002-13840A 2002.01.18 |
| JP特开平11-83376A 1999.03.26 |
| 张毅等."加氢裂化高压空冷器的防腐分析与措施".《石油炼制与化工》.2009,第40卷(第6期),全文. |
| 李子涛等."蜡油加氢处理装置高压空气冷却器腐蚀分析及预防措施".《石化技术与应用》.2010,第28卷(第3期),全文. |
| 谭金龙等."加氢裂化装置高压空气冷却器的腐蚀失效分析".《石油化工腐蚀与防护》.2009,第26卷(第2期),全文. |
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| Publication number | Publication date |
|---|---|
| CN101881566A (en) | 2010-11-10 |
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