CN201971761U - Device for preparing aromatic hydrocarbon by low carbon aromatization - Google Patents
Device for preparing aromatic hydrocarbon by low carbon aromatization Download PDFInfo
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- CN201971761U CN201971761U CN2010206802770U CN201020680277U CN201971761U CN 201971761 U CN201971761 U CN 201971761U CN 2010206802770 U CN2010206802770 U CN 2010206802770U CN 201020680277 U CN201020680277 U CN 201020680277U CN 201971761 U CN201971761 U CN 201971761U
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- aromatization
- aromizing
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- aromatic hydrocarbons
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Abstract
The utility model relates to a device for preparing aromatic hydrocarbon by low carbon aromatization, which comprises a delivery manifold, a first delivery branch pipe, a second delivery branch pipe, an aromatization reactor, a heater, a dry gas feeding heat exchanger, a cooler, an aromatization gas-liquid separator, an aromatic hydrocarbon pump and a circulating device. The delivery manifold is communicated with the first and second delivery branch pipes, the first delivery branch pipe is communicated with the top inlet of the aromatization reactor via the dry gas feeding heat exchanger and the heater, the second delivery branch pipe is communicated with the middle inlet of the aromatization reactor, the gas phase outlet of the aromatization gas-liquid separator is communicated with the delivery manifold via the circulating device. The circulating device forces the dry gas to circulate so as to increase the air inflow of the aromatization reactor. The over-temperature phenomenon is avoided inside the aromatization reactor, carbon deposited on the surface of the catalyst is less, and the operating time of the catalyst is increased, therefore the reaction is more thoroughly, the reaction rate of ethylene is high, and the aromatic hydrocarbon has high yield and good quality.
Description
Technical field
The utility model relates to the device that a kind of aromatization of low carbon hydrocarbon prepares aromatic hydrocarbons, belongs to chemical technology field.
Background technology
At present, the preparation method and the equipment thereof that carry out aromizing at dry gas are varied, usually use aromatization reactor to carry out, the applicant carries out the aromizing production system that aromatic hydrocarbons adopted at present and mainly comprises aromatization reactor 4, well heater 5, dry gas feed exchanger 6, aromizing water cooler 7, aromizing deep freezer 8, aromizing gas-liquid separator 9 and aromatic hydrocarbons pump 10, use the concrete technology of aromatization of aforesaid device to be: the dry gas of the need aromizing of partly coming from product separation is divided into two strands: first strand at first enters dry gas feed exchanger 6 as main line, carry out heat exchange to improve temperature with the gas behind the aromatization, entering well heater 5 more further heats, be heated to that the top from aromatization reactor 4 enters after 300 ℃, contact with catalyzer and carry out aromatization; Second strand in order to control aromatization reactor 4 temperature inside, without the heat exchange temperature raising, directly enters aromatization reactor.
Gas behind the aromatization comes out to enter dry gas feed exchanger 6 from the bottom of aromatization reactor 4, after the heat exchange of raw material dry gas, be cooled to 20 ℃ through aromizing water cooler 7, aromizing deep freezer 8, enter aromizing gas-liquid separator 9 at last and carry out gas-liquid separation, obtain fuel gas and liquid aromatic hydrocarbons, fuel gas enters the fuel gas pipe network, and liquid aromatic hydrocarbons is delivered to the tank field through aromatic hydrocarbons pump 10.
If there is not the second strand road, so since dry gas enter from the aromatization reactor top after being heated to 300 ℃, contact with catalyzer and to carry out aromatization, its reaction itself produces bigger heat, the advantage of said system technology is, designed two circuits, the main purpose on the second strand road is for to lower the temperature to reaction with a part of cold feed dry gas.
Still the defective of Cun Zaiing is: the inside reactor temperature is uncontrollable, the frequent overtemperature of inside reactor, and the high limit of super thermometric is 700 ℃ when the highest, cause sintering of catalyst, owing to the temperature height, the catalyst surface carbon distribution is serious simultaneously, the catalyzer overall operation time is short, is restricting the operation of aromizing system.
Ethylene content was about 40% when dry gas advanced aromatization reactor 4, and ethylene content is still about 20% in the fuel gas after the aromizing, and the ethene of participating in reaction is less, reactivity only 50%.
Dry gas refers to carbon four after scission reaction is separated, and generating portion is rich in the gas of ethene and hydrogen etc. and since this part gas difficulty be condensed into liquid, so be referred to as dry gas.
Fuel gas refers to dry gas through behind the aromatization, and composition changes, and ethene aromatization wherein becomes aromatic hydrocarbons, and the residue major part is a hydrogen, can only put at present to the roasting kiln burning, so be referred to as fuel gas.
The utility model content
Problem to be solved in the utility model is at above deficiency, provides a kind of aromatization of low carbon hydrocarbon that can effectively improve product yield and quality product to prepare the device of aromatic hydrocarbons.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of aromatization of low carbon hydrocarbon prepares the device of aromatic hydrocarbons, it is characterized in that: described device comprises the delivery manifold, first carries arm, second carries arm, aromatization reactor, well heater, the dry gas feed exchanger, water cooler, the aromizing gas-liquid separator, aromatic hydrocarbons pump and circulation device, delivery manifold and first carries arm, second carries arm to be communicated with, first carries arm through the dry gas feed exchanger, well heater is communicated with the top inlet of aromatization reactor, and second carries arm to be communicated with the centre inlet of aromatization reactor.
Further improvement as such scheme:
The outlet of described aromatization reactor is through the import of dry gas feed exchanger, water cooler connection aromizing gas-liquid separator, and the gaseous phase outlet of aromizing gas-liquid separator is communicated with the delivery manifold through circulation device.
The liquid phase outlet of described aromizing gas-liquid separator is communicated with the aromatic hydrocarbons pump.
Described circulation device is a spiral-lobe compressor.
Described water cooler comprises placed in-line aromizing water cooler and aromizing deep freezer.
Described well heater is an electric heater.
The utility model has adopted technique scheme, compared with prior art, have the following advantages: the gaseous phase outlet of aromizing gas-liquid separator is communicated with the delivery manifold through circulation device, use circulation device that dry gas is carried out pump circulation, increased the air input of aromatization reactor, the aromatization reactor internal temperature does not have overheating problem, and the catalyst surface carbon distribution is few, increased the working time of catalyzer, reacted more thorough; After testing, in the gas behind the aromatization, ethylene content is about 0.1%, therefore, and the reactivity height of ethene, the output height of aromatic hydrocarbons, good product quality.
Below in conjunction with the drawings and specific embodiments the utility model is further described.
Description of drawings
Accompanying drawing is the structural representation that aromizing prepares aromatic device among the utility model embodiment.
Among the figure,
1-delivery manifold, 2-first carries arm, and 3-second carries arm, 4-aromatization reactor, 5-well heater, 6-dry gas feed exchanger, 7-aromizing water cooler, 8-aromizing deep freezer, 9-aromizing gas-liquid separator, 10-aromatic hydrocarbons pump, 11-circulation device.
Embodiment
Embodiment, as shown in the figure, a kind of aromatization of low carbon hydrocarbon prepares the device of aromatic hydrocarbons, comprise delivery manifold 1, first carries arm 2, second carries arm 3, aromatization reactor 4, well heater 5, dry gas feed exchanger 6, water cooler, aromizing gas-liquid separator 9, aromatic hydrocarbons pump 10 and circulation device 11, delivery manifold 1 and first carries arm 2, second carries arm 3 to be communicated with, first carries arm 2 through dry gas feed exchanger 6, well heater 5 is communicated with the top inlet of aromatization reactor 4, second carries arm 3 to be communicated with the centre inlet of aromatization reactor 4, the outlet of aromatization reactor 4 is through dry gas feed exchanger 6, water cooler is communicated with the import of aromizing gas-liquid separator 9, the gaseous phase outlet of aromizing gas-liquid separator 9 is communicated with delivery manifold 1 through circulation device 11, the liquid phase outlet of aromizing gas-liquid separator 9 is communicated with aromatic hydrocarbons pump 10, water cooler comprises aromizing water cooler 7 and aromizing deep freezer 8, aromizing water cooler 7 and aromizing deep freezer 8 are water cooler, be connected with nature water in the aromizing water cooler 7, be connected with the water after the refrigeration in the aromizing deep freezer 8.
Enter the first conveying arm 2 and the second conveying arm 3 from delivery manifold 1 raw material dry gas, part raw material dry gas carries arm 2 to enter dry gas feed exchanger 6 internal heating through first, being delivered to well heater 5 then further heats, be heated to that the top from aromatization reactor 4 enters after 300 ± 50 ℃, contact with catalyzer and to carry out aromatization, another part raw material dry gas carries arm 3 directly to enter aromatization reactor 4 through second, contact with catalyzer and to carry out aromatization, first to carry in the arm 2 raw material dry gas and second to carry the throughput ratio of arm 3 interior raw material dry gas be 3: 1.
Gas behind the aromatization enters dry gas feed exchanger 6 after coming out from the bottom of aromatization reactor 4, carry out lowering the temperature after the heat exchange with the raw material dry gas in the first conveying arm 2, re-using water cooler lowers the temperature, water cooler comprises aromizing water cooler 7 and aromizing deep freezer 8, aromizing water cooler 7 is tentatively lowered the temperature, aromizing deep freezer 8 is further lowered the temperature, temperature is reduced to normal temperature, enter then and carry out gas-liquid separation in the aromizing gas-liquid separator 9, obtain fuel gas from the gaseous phase outlet on aromizing gas-liquid separator 9 tops, the part of fuel gas is back to delivery manifold 1 place after circulation device 11 compressions and the raw material dry gas converges, another part of fuel gas enters the fuel gas pipe network, obtain liquid aromatic hydrocarbons from the liquid phase outlet of aromizing gas-liquid separator 9 bottoms, liquid aromatic hydrocarbons is delivered to the tank field through aromatic hydrocarbons pump 10.
Claims (6)
1. an aromatization of low carbon hydrocarbon prepares the device of aromatic hydrocarbons, it is characterized in that: described device comprises delivery manifold (1), first carries arm (2), second carries arm (3), aromatization reactor (4), well heater (5), dry gas feed exchanger (6), water cooler, aromizing gas-liquid separator (9), aromatic hydrocarbons pump (10) and circulation device (11), delivery manifold (1) carries arm (2) with first, second carries arm (3) to be communicated with, first carries arm (2) through dry gas feed exchanger (6), well heater (5) is communicated with the top inlet of aromatization reactor (4), and second carries arm (3) to be communicated with the centre inlet of aromatization reactor (4).
2. aromatization of low carbon hydrocarbon prepares the device of aromatic hydrocarbons according to claim 1, it is characterized in that: the outlet of described aromatization reactor (4) is through the import of dry gas feed exchanger (6), water cooler connection aromizing gas-liquid separator (9), and the gaseous phase outlet of aromizing gas-liquid separator (9) is communicated with delivery manifold (1) through circulation device (11).
3. prepare the device of aromatic hydrocarbons as aromatization of low carbon hydrocarbon as described in claim or 1 or 2, it is characterized in that: the liquid phase outlet of described aromizing gas-liquid separator (9) is communicated with aromatic hydrocarbons pump (10).
4. aromatization of low carbon hydrocarbon prepares the device of aromatic hydrocarbons according to claim 1, and it is characterized in that: described circulation device (11) is a spiral-lobe compressor.
5. aromatization of low carbon hydrocarbon prepares the device of aromatic hydrocarbons according to claim 1, and it is characterized in that: described water cooler comprises placed in-line aromizing water cooler (7) and aromizing deep freezer (8).
6. aromatization of low carbon hydrocarbon prepares the device of aromatic hydrocarbons according to claim 1, and it is characterized in that: described well heater (5) is an electric heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206802770U CN201971761U (en) | 2010-12-27 | 2010-12-27 | Device for preparing aromatic hydrocarbon by low carbon aromatization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206802770U CN201971761U (en) | 2010-12-27 | 2010-12-27 | Device for preparing aromatic hydrocarbon by low carbon aromatization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201971761U true CN201971761U (en) | 2011-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206802770U Expired - Fee Related CN201971761U (en) | 2010-12-27 | 2010-12-27 | Device for preparing aromatic hydrocarbon by low carbon aromatization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201971761U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102093155A (en) * | 2010-12-27 | 2011-06-15 | 山东东方宏业化工有限公司 | Process and device for preparing arene through low carbon hydrocarbon aromatization |
-
2010
- 2010-12-27 CN CN2010206802770U patent/CN201971761U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102093155A (en) * | 2010-12-27 | 2011-06-15 | 山东东方宏业化工有限公司 | Process and device for preparing arene through low carbon hydrocarbon aromatization |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20141227 |
|
| EXPY | Termination of patent right or utility model |