CN219279807U - Ethylene schizolysis carbon nine ultrasonic desulfurization device - Google Patents
Ethylene schizolysis carbon nine ultrasonic desulfurization device Download PDFInfo
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- CN219279807U CN219279807U CN202320928776.4U CN202320928776U CN219279807U CN 219279807 U CN219279807 U CN 219279807U CN 202320928776 U CN202320928776 U CN 202320928776U CN 219279807 U CN219279807 U CN 219279807U
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Abstract
The utility model relates to an ethylene cracking carbon nine ultrasonic desulfurization device which comprises an adsorption bed, a first-stage extraction tower and a second-stage extraction tower which are sequentially arranged, wherein the first-stage extraction tower and the second-stage extraction tower are respectively communicated with an extractant recovery device, and at least two groups of adsorption beds are arranged, so that each adsorption bed can be switched for use. In addition, the utility model adopts a plurality of adsorption beds which are switched to work, so that the adsorption desulfurization operation is not required to be stopped when the adsorbent is regenerated, the whole adsorption desulfurization process is continuous, the operation time is reduced, and the production cost is reduced.
Description
Technical Field
The utility model relates to the technical field of petrochemical industry, in particular to an ethylene cracking carbon nine ultrasonic desulfurization device.
Background
Ethylene is a basic raw material in petrochemical industry, and the existence of sulfur in carbon nine causes heavy odor of products, influences the quality and application of the products and pollutes the environment. Therefore, how to reduce the sulfur content in the carbon nine is a key for improving the quality of subsequent products and fully utilizing the carbon nine.
The main existence forms of sulfur in the pyrolysis carbon are inorganic sulfur and organic sulfur. Inorganic sulfur mainly includes sulfides, sulfur dioxide, and polysulfides. Organic sulfur includes various low molecular mercaptans, thioethers, thiophenic sulfur, alkylthiophenic sulfur, and the like. Inorganic sulfur has extremely strong corrosiveness and can corrode equipment; most organic sulfur has bad smell, and is easy to decompose at high temperature to produce hydrogen sulfide, thereby corroding equipment and polluting environment. The existence of sulfide also affects the stability of the carbon nine and the stability of production and processing, the sulfide in the carbon nine is easy to polymerize to generate colloid in production, and the sulfide also has the effect of catalyzing colloid generation, and can damage the normal operation of equipment when serious, and the sulfide generated by the decomposition further corrodes the equipment, thereby affecting the service life of the device.
At present, hydrodesulfurization is mainly performed, and the hydrodesulfurization requires that organic sulfur in oil products reacts with hydrogen to generate hydrogen sulfide under the existence of high temperature and high pressure and a catalyst so as to achieve the purpose of desulfurization, and the technology has the following defects: the method has high requirements on equipment, high hydrogen consumption and high operation cost, and can saturate unsaturated bonds (olefins) in oil products at the same time of desulfurizing, so that the method can not be used as raw materials for producing petroleum resin or dicyclopentadiene. In addition, the prior desulfurization method for the carbon nine is less in research, mainly the desulfurization of oil products, and the carbon nine component is different from the component of the oil products, so that the desulfurization method suitable for the oil products is not necessarily suitable for the desulfurization of the carbon nine, and the research and development of the desulfurization device for the ethylene pyrolysis carbon nine has a certain practical significance.
Disclosure of Invention
The utility model aims to solve the technical problem of overcoming the defects in the prior art and providing an ethylene cracking carbon nine ultrasonic desulfurization device.
The utility model is realized by the following technical scheme:
the utility model provides an ethylene schizolysis carbon nine ultrasonic desulfurization device, includes adsorption bed, one-level extraction tower and the second grade extraction tower that sets gradually, one-level extraction tower, second grade extraction tower communicate respectively has extractant recovery unit, the adsorption bed sets up two at least groups, makes each the adsorption bed can switch the use.
According to the above technical scheme, preferably, the adsorption beds are provided with two groups in parallel, the bottoms of the two adsorption beds are respectively communicated with a carbon nine raw material feeding pipe, and the upper parts of the two adsorption beds are respectively communicated with the lower part of the primary extraction tower through pipelines.
According to the technical scheme, preferably, the upper part of the adsorption bed is connected with a hot nitrogen inlet pipe, and the bottom of the adsorption bed is connected with a sulfur-containing nitrogen outlet pipe.
According to the technical scheme, preferably, the upper part of the primary extraction tower is communicated with a primary extractant feeding pipe and a primary carbon nine pipeline, the upper part of the secondary extraction tower is communicated with a secondary extractant feeding pipe and a desulfurization carbon nine pipeline, and the upper part of the primary extraction tower is communicated with the bottom of the secondary extraction tower through the primary carbon nine pipeline.
According to the above technical scheme, preferably, the extractant recovery device comprises a first-stage evaporator communicated with the bottom of the first-stage extraction tower and a second-stage evaporator communicated with the bottom of the second-stage extraction tower, wherein the first-stage evaporator is communicated with a first-stage extractant feeding pipe, and the second-stage evaporator is communicated with a second-stage extractant feeding pipe.
According to the above technical scheme, preferably, a first-stage buffer tank is arranged between the first-stage extraction tower and the first-stage evaporator, and a second-stage buffer tank is arranged between the second-stage extraction tower and the second-stage evaporator.
According to the above technical scheme, preferably, the primary extraction tower and the secondary extraction tower are respectively rotary disk extraction towers.
The beneficial effects of the utility model are as follows:
in addition, the utility model adopts a plurality of adsorption beds which are switched to work, so that the adsorption desulfurization operation is not required to be stopped when the adsorbent is regenerated, the whole adsorption desulfurization process is continuous, the operation time is reduced, and the production cost is reduced.
Drawings
Fig. 1 is a schematic view of the device connection structure of the present utility model.
In the figure: 1. an adsorption bed a; 2. an adsorption bed ultrasonic device a; 3. an adsorption bed b; 4. an adsorption bed ultrasonic device b; 5. a first-stage extraction tower; 6. an ultrasonic device a of the extraction tower; 7. a first-stage buffer tank; 8. a primary feed pump; 9. a first-stage evaporator; 10. a primary discharge pump; 11. a first-stage condenser; 12. a second-stage extraction column; 13. an ultrasonic device b of the extraction tower; 14. a second-stage buffer tank; 15. a secondary feed pump; 16. a secondary evaporator; 17. a secondary discharge pump; 18. a secondary condenser.
Detailed Description
The present utility model will be described in further detail below with reference to the drawings and preferred embodiments, so that those skilled in the art can better understand the technical solutions of the present utility model. All other embodiments, based on the embodiments of the utility model, which would be apparent to one of ordinary skill in the art without making any inventive effort are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model.
Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.
As shown in the figure, the utility model comprises an adsorption bed, a first-stage extraction tower 5 and a second-stage extraction tower 12 which are sequentially arranged, wherein the first-stage extraction tower 5 and the second-stage extraction tower 12 are respectively communicated with an extractant recovery device, and at least two groups of adsorption beds are arranged, so that each adsorption bed can be switched for use. Preferably, two groups (adsorption bed a1 and adsorption bed b 3) are arranged in parallel, the bottoms of the two adsorption beds are respectively communicated with a carbon nine raw material feed pipe, the upper parts of the two adsorption beds are respectively communicated with the lower part of the primary extraction tower 5 through pipelines, in addition, the upper parts of the adsorption beds are connected with a hot nitrogen feed pipe, and the bottoms of the adsorption beds are connected with a sulfur-containing nitrogen discharge pipe. In the embodiment, the two groups of adsorption beds are respectively provided with an adsorption bed ultrasonic device a2 and an adsorption bed ultrasonic device b4, and the ultrasonic devices are relatively quick, low in cost, safe and efficient, so that the adsorption speed is increased.
Among them, the primary extraction column 5 and the secondary extraction column 12 are preferably but not limited to a rotary disk extraction column, respectively, which has the advantages of small occupation area, low maintenance cost, large processing capacity, suitability for continuous production, small solvent retention, and the like. The upper part of the primary extraction tower 5 is communicated with a primary extractant feeding pipe and a primary carbon nine pipeline, the upper part of the secondary extraction tower 12 is communicated with a secondary extractant feeding pipe and a desulfurization carbon nine pipeline, and the upper part of the primary extraction tower 5 is communicated with the bottom of the secondary extraction tower 12 through the primary carbon nine pipeline. In this example, the first-stage extraction tower 5 and the second-stage extraction tower 12 are respectively provided with an extraction tower ultrasonic device a6 and an extraction tower ultrasonic device b13, and the ultrasonic devices are relatively quick, cheap, safe and efficient, so that the depth of extraction is increased, and desulfurization is more thorough.
In addition, extractant recovery device includes the one-level evaporator 9 that is linked together with the bottom of one-level extraction tower 5 and the second grade evaporator 16 that is linked together with the bottom of second grade extraction tower 12, one-level evaporator 9 is linked together with one-level extractant inlet pipe, second grade evaporator 16 is linked together with second grade extractant inlet pipe, is equipped with one-level buffer tank 7 between one-level extraction tower 5 and the one-level evaporator 9, be equipped with second grade buffer tank 14 between second grade extraction tower 12 and the second grade evaporator 16. In this example, the first-stage evaporator 9 and the second-stage evaporator 16 are both falling film evaporators, and compared with the extractant recovery tower, the falling film evaporators are simple to operate and lower in equipment cost.
Specifically, the upper portion of one-level extraction tower 5 is equipped with the feed inlet, connects one-level extractant inlet pipe, and one-level extraction tower 5 upper portion is equipped with the discharge gate, through pipeline connection second grade extraction tower 12 lower part feed inlet, and one-level extraction tower 5 bottom is equipped with the discharge gate, through pipeline connection one-level buffer tank 7 upper portion feed inlet. The bottom of the primary buffer tank 7 is provided with a discharge hole, and the discharge hole is connected with an inlet of the primary feed pump 8 through a pipeline. The top of the primary evaporator 9 is provided with a feed inlet, an outlet of the primary feed pump 8 is connected through a pipeline, the middle of the primary evaporator 9 is provided with a discharge outlet, a material inlet of the primary condenser 11 is connected through a pipeline, the material outlet of the primary condenser 11 is connected with a high-sulfur oil pipeline, the bottom of the primary evaporator 9 is provided with a discharge outlet, an inlet of the primary discharge pump 10 is connected through a pipeline, and an outlet of the primary discharge pump 10 is connected with a primary extractant feed pipe at the upper part of the primary extraction tower 5 through a pipeline.
The upper part of the secondary extraction tower 12 is provided with a feed inlet which is connected with a secondary extractant feed pipe, the upper part of the secondary extraction tower 12 is provided with a discharge outlet which is connected with a desulfurization carbon nine pipeline, the bottom of the secondary extraction tower 12 is provided with a discharge outlet which is connected with the feed inlet at the upper part of the secondary buffer tank 14 through a pipeline. The bottom of the secondary buffer tank 14 is provided with a discharge port, and the discharge port is connected with the inlet of a secondary feed pump 15 through a pipeline. The top of the secondary evaporator 16 is provided with a feed inlet, the feed inlet is connected with an outlet of the secondary feed pump 15 through a pipeline, the middle part of the secondary evaporator 16 is provided with a discharge outlet, the feed inlet is connected with a material inlet of the secondary condenser 18 through a pipeline, the material outlet of the secondary condenser 18 is connected with a high-sulfur oil pipeline, the bottom of the secondary evaporator 16 is provided with a discharge outlet, the discharge outlet is connected with an inlet of the secondary discharge pump 17 through a pipeline, and the outlet of the secondary discharge pump 17 is connected with a secondary extractant feed pipe at the upper part of the secondary extraction tower 12 through a pipeline.
The preferred working mode of the utility model is as follows: the carbon nine raw materials enter from a feed inlet at the bottom of the adsorption bed, and after ultrasonic adsorption desulfurization by the adsorption bed, the materials at the upper part of the adsorption bed enter a first-stage extraction tower. When the adsorbent is regenerated, the carbon nine raw material is switched to another adsorbent bed for feeding, hot nitrogen enters the adsorbent bed from the upper part of the adsorbent bed to be regenerated, and sulfur-containing nitrogen after purging and regeneration is discharged from the lower part of the adsorbent bed. The extractant I enters from the upper part of the primary extraction tower, after ultrasonic extraction, the carbon nine materials at the upper part of the primary extraction tower enter the secondary extraction tower, and the materials at the lower part enter the primary buffer tank and are pumped to the primary evaporator by the primary feed pump. The lower material of the first-stage extraction tower is separated by a first-stage evaporator, high-sulfur oil is distilled from the middle outlet of the first-stage evaporator, condensed by a first-stage condenser and extracted; the materials at the bottom of the first-stage evaporator are returned to the extractant feed inlet of the first-stage extraction tower for recycling after being extracted by the first-stage extraction pump. The extractant II enters from the upper part of the secondary extraction tower, after ultrasonic extraction, the target product, namely the desulfurization carbon nine, is extracted from the upper part of the secondary extraction tower, and the lower material enters into the secondary buffer tank and is pumped to the secondary evaporator by the secondary feeding pump. Separating the lower material of the second-stage extraction tower by a second-stage evaporator, distilling high-sulfur oil from the middle outlet of the second-stage evaporator, condensing by a first-stage condenser, and extracting; the materials at the bottom of the secondary evaporator are returned to the extractant feed inlet of the secondary extraction tower for recycling after being extracted by the secondary extraction pump.
The utility model adopts three-stage desulfurization combination of adsorption, primary extraction and secondary extraction to remove different forms of sulfur respectively, wherein, the adsorption bed removes inorganic sulfur, the primary extraction removes mercaptan, thioether and partial thiophenic sulfur, the secondary extraction removes thiophenic sulfur, mercaptan, thioether and other organic sulfur, the desulfurization efficiency and selectivity are high, and the extraction performance is effectively enhanced.
The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.
Claims (7)
1. The utility model provides an ethylene schizolysis carbon nine supersound desulphurization unit, its characterized in that includes adsorption bed, one-level extraction tower (5) and second grade extraction tower (12) that set gradually, one-level extraction tower (5), second grade extraction tower (12) communicate respectively has extractant recovery unit, the adsorption bed sets up two at least groups, makes each the adsorption bed can switch the use.
2. The ethylene cracking carbon nine ultrasonic desulfurization device according to claim 1, wherein two groups of adsorption beds are arranged in parallel, the bottoms of the two adsorption beds are respectively communicated with a carbon nine raw material feeding pipe, and the upper parts of the two adsorption beds are respectively communicated with the lower part of a primary extraction tower (5) through pipelines.
3. The ethylene cracking carbon nine ultrasonic desulfurization device according to claim 1 or 2, wherein the upper part of the adsorption bed is connected with a hot nitrogen inlet pipe, and the bottom of the adsorption bed is connected with a sulfur-containing nitrogen outlet pipe.
4. The ethylene cracking carbon nine ultrasonic desulfurization device according to claim 1, wherein a primary extractant feed pipe and a primary carbon nine pipeline are communicated with the upper part of the primary extraction tower (5), a secondary extractant feed pipe and a desulfurization carbon nine pipeline are communicated with the upper part of the secondary extraction tower (12), and the upper part of the primary extraction tower (5) is communicated with the bottom of the secondary extraction tower (12) through the primary carbon nine pipeline.
5. The ethylene cracking carbon nine ultrasonic desulfurization device according to claim 4, wherein the extractant recovery device comprises a primary evaporator (9) communicated with the bottom of the primary extraction tower (5) and a secondary evaporator (16) communicated with the bottom of the secondary extraction tower (12), the primary evaporator (9) is communicated with a primary extractant feed pipe, and the secondary evaporator (16) is communicated with a secondary extractant feed pipe.
6. The ethylene cracking carbon nine ultrasonic desulfurization device according to claim 5, wherein a primary buffer tank (7) is arranged between the primary extraction tower (5) and the primary evaporator (9), and a secondary buffer tank (14) is arranged between the secondary extraction tower (12) and the secondary evaporator (16).
7. The ethylene cracking carbon nine ultrasonic desulfurization apparatus according to any one of claims 1, 2, 4-6, wherein said primary extraction column (5) and said secondary extraction column (12) are respectively rotary disk extraction columns.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320928776.4U CN219279807U (en) | 2023-04-23 | 2023-04-23 | Ethylene schizolysis carbon nine ultrasonic desulfurization device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320928776.4U CN219279807U (en) | 2023-04-23 | 2023-04-23 | Ethylene schizolysis carbon nine ultrasonic desulfurization device |
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| CN219279807U true CN219279807U (en) | 2023-06-30 |
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| CN202320928776.4U Active CN219279807U (en) | 2023-04-23 | 2023-04-23 | Ethylene schizolysis carbon nine ultrasonic desulfurization device |
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