CN215559980U - High efficiency propane circulation drying system - Google Patents
High efficiency propane circulation drying system Download PDFInfo
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- CN215559980U CN215559980U CN202120235999.3U CN202120235999U CN215559980U CN 215559980 U CN215559980 U CN 215559980U CN 202120235999 U CN202120235999 U CN 202120235999U CN 215559980 U CN215559980 U CN 215559980U
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- Prior art keywords
- propane
- raw material
- tower
- communicated
- pipeline
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- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 239000001294 propane Substances 0.000 title claims abstract description 86
- 238000001035 drying Methods 0.000 title claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 54
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims abstract description 12
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000006356 dehydrogenation reaction Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- JTXAHXNXKFGXIT-UHFFFAOYSA-N propane;prop-1-ene Chemical group CCC.CC=C JTXAHXNXKFGXIT-UHFFFAOYSA-N 0.000 description 7
- 238000010276 construction Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 206010060904 Freezing phenomenon Diseases 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Drying Of Solid Materials (AREA)
Abstract
The utility model relates to the technical field of propylene preparation by propane dehydrogenation, and relates to a high-efficiency propane circulating drying system, which comprises the following components: the high-efficiency propane circulation drying system comprises a propane spherical tank, a raw material pump, a propane self-tank area, a raw material pretreatment dryer, a depropanizing tower, a cooling box, a deethanizing tower and a propane and propylene separation tower which are sequentially communicated, wherein a discharge port of the propane self-tank area is communicated with a feed port of the raw material pretreatment dryer through a first pipeline, a discharge port of the raw material pretreatment dryer is communicated with a feed port of the depropanizing tower through a second pipeline, the bottom of the deethanizing tower is connected with a deethanizing tower bottom pump, the deethanizing tower bottom pump is communicated with the right end of the raw material pretreatment dryer through a third pipeline, and a discharge port of the propane and propylene separation tower is communicated with the propane spherical tank through a fourth pipeline.
Description
Technical Field
The utility model relates to the technical field of propylene preparation by propane dehydrogenation, and relates to a high-efficiency propane circulating drying system.
Background
Propylene is one of the basic raw materials of three major synthetic materials, and the largest amount is used for producing polypropylene. The production of propylene can be made by the process of propane dehydrogenation to propylene.
In the construction and construction stage of a 45-kiloton/year PDH propane dehydrogenation propylene preparation device of our company, a part of moisture can remain in a system pipeline and a system container due to contact with air in pipeline pressure test, container internal inspection and the like. The formal feeding and test run of the device has high requirement on the water content in the system, and the system needs to be circularly dried and dehydrated by using the raw material propane, so that the water content is reduced to below 1ppm, thereby protecting an important device, namely a cold box, in the subsequent process, and preventing the freezing phenomenon from occurring after materials are fed, damaging the device and influencing the production.
In summary, in order to overcome the defects in the prior art, a high-efficiency propane circulation drying system with a simple structure and a good drying effect needs to be designed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high-efficiency propane circulating drying system for solving the problems in the prior art.
The purpose of the utility model can be realized by the following technical scheme: a high efficiency propane cycle drying system comprising:
the device comprises a propane spherical tank, a raw material pump, a propane self-tank area, a raw material pretreatment dryer, a depropanizing tower, a cold box, a deethanizing tower and a propane propylene separation tower, wherein a discharge port of the propane spherical tank is connected with one end of the raw material pump, the other end of the raw material pump is communicated with a feed port of the propane self-tank area, the discharge port of the propane self-tank area is communicated with a feed port of the raw material pretreatment dryer through a first pipeline, the discharge port of the raw material pretreatment dryer is communicated with a feed port of the depropanizing tower through a second pipeline, the discharge port of the depropanizing tower is communicated with the feed port of the cold box, the discharge port of the cold box is communicated with a feed port of the deethanizing tower, the discharge port of the deethanizing tower is communicated with the feed port of the propane propylene separation tower, the bottom of the deethanizing tower is connected with a deethanizing tower bottom pump, the deethanizing tower bottom pump is communicated with the right end of the raw material pretreatment dryer through a third pipeline, and a discharge hole of the propane and propylene separating tower is communicated with a propane spherical tank through a fourth pipeline.
In a further improvement, an active alumina layer is arranged in the raw material pretreatment dryer.
In a further improvement, the raw material pretreatment dryer is communicated with a propane tank through a propane pipeline, a propane outlet of the propane pipeline is positioned below the active alumina layer, a heater is arranged in the raw material pretreatment dryer and positioned above the propane outlet, a valve port capable of being opened and closed is arranged at the top of the pretreatment dryer, a first switch is arranged at a feed inlet of the raw material pretreatment dryer, a second switch is arranged at a discharge outlet of the raw material pretreatment dryer, and a third switch is arranged at a discharge outlet of the raw material pretreatment dryer.
In a further improvement, the flow rate of the gas source in the propane tank is 10-20m3/h。
In a further improvement, the heating temperature of the heater is 180-350 ℃.
In a further improvement, a check valve is arranged on the fourth pipeline.
Compared with the prior art, the high-efficiency propane circulating drying system has the advantages that the propane propylene separation tower is communicated with the propane spherical tank through the fourth pipeline, the deethanizer is communicated with the raw material pretreatment dryer through the third pipeline, the two pipelines are used in a combined mode, the water content of propane in the system can be remarkably reduced, the drying time is shortened, the feeding and starting conditions of the device are met in advance, qualified products are produced in advance, and benefits are created.
Drawings
FIG. 1 is a schematic structural diagram of the present invention
FIG. 2 is a schematic view of a raw material pretreatment dryer according to the present invention
In the figure, 10-propane ball tank, 101-raw material pump, 11-propane self-tank area, 13-cold box, 14-deethanizer, 141-deethanizer bottom pump, 142-third pipeline, 15-propane propylene separation tower, 151-fourth pipeline, 152-one-way valve, 20-raw material pretreatment drier, 201-active alumina layer, 202-propane pipeline, 2021-propane outlet, 203-propane tank, 204-heater, 205-valve port, 206-switch I, 207-switch II, 208-switch III, 21-first pipeline and 22-second pipeline.
Detailed Description
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The technical solution of the present invention is further described below with reference to the following embodiments and accompanying drawings 1-2.
Example 1
The device comprises a propane spherical tank 10, a raw material pump 101, a propane self-tank area 11, a raw material pretreatment dryer 20, a depropanizing tower 12, a cold box 13, a deethanizing tower 14 and a propane propylene separation tower 15, wherein a discharge port of the propane spherical tank 10 is connected with one end of the raw material pump 101, the other end of the raw material pump 101 is communicated with a feed port of the propane self-tank area 11, a discharge port of the propane self-tank area 11 is communicated with a feed port of the raw material pretreatment dryer 20 through a first pipeline 21, a discharge port of the raw material pretreatment dryer 20 is communicated with a feed port of the depropanizing tower 12 through a second pipeline 22, a discharge port of the depropanizing tower 12 is communicated with a feed port of the cold box 13, a discharge port of the cold box 13 is communicated with a feed port of the deethanizing tower 14, a discharge port of the deethanizing tower 14 is communicated with a feed port of the propane propylene separation tower 15, the bottom of the deethanizing tower 14 is connected with a deethanizing tower bottom pump 141, the deethanizer bottom pump 141 is communicated with the right end of the raw material pretreatment dryer 20 through a third pipeline 142, and the discharge port of the propane propylene separation tower 15 is communicated with the propane spherical tank 10 through a fourth pipeline 151.
As shown in figure 1, in the construction and construction stage of the PDH device, a part of moisture remains in a system pipeline and a container due to contact with air caused by pressure test of pipelines, internal inspection of the container and the like, so that the requirement of formal feeding and test run of the device on the water content in the system is high, and the system needs to be circularly dried and dehydrated by using raw material propane.
Wherein, the deethanizer bottom pump 141 is communicated with the right end of the raw material pretreatment dryer 20 through the third pipeline 142, the propane with water is circulated to absorb water through the raw material pretreatment dryer 20, the container can be dried, the integral circulating drying time can be influenced because the deethanizer bottom pump 141 has small design flow, therefore, the discharge port of the propane propylene separating tower 15 is communicated with the propane ball tank 10 through the fourth pipeline 151, the water-containing propane in the circulating drying is firstly sent into the propane ball tank 10 through a newly added pipeline, and then is sent into the raw material pretreatment dryer 20 through the raw material pump 101 after a large amount of water is removed through stillness, and the circulating drying time of the system pipeline and the equipment can be greatly reduced.
Through the combined use of the fourth pipeline 151 and the third pipeline 142, the water content of propane in the system can be obviously reduced, the drying time is shortened, the feeding and driving conditions of the device are met in advance, qualified products are produced in advance, and benefits are created.
Through the propane moisture drying system and can protect important equipment-cold box in the subsequent process, prevent to appear freezing phenomenon after advancing the material, damage equipment and influence production.
Example 2
An activated alumina layer 201 is provided in the raw material pretreatment dryer 20. The alumina in the activated alumina layer 201 is a porous solid material with high dispersity, has a large surface area, has excellent adsorption performance, and can adsorb moisture in hydrous propane.
Example 3
The raw material pretreatment dryer 20 is communicated with a propane tank 203 through a propane pipeline 202, a propane outlet 2021 of the propane pipeline 202 is positioned below the activated alumina layer 201, a heater 204 is arranged in the raw material pretreatment dryer 20, the heater 204 is positioned above the propane outlet 2021, the top of the pretreatment dryer 20 is provided with an openable valve port 205, a first switch 206 is arranged at a feed inlet of the raw material pretreatment dryer 20, a second switch 207 is arranged at a discharge outlet of the raw material pretreatment dryer 20, and a third switch 208 is arranged at a discharge outlet of the raw material pretreatment dryer 20.
As shown in fig. 1 and 2, since the activated alumina layer 201 is saturated after adsorbing moisture to a certain degree, in order to enable the activated alumina layer 201 to be used along the cycle, at this time, the first switch 206, the second switch 207 and the third switch 208 are closed, the valve port 205 is opened, the activated alumina layer 201 is heated by the heater 204, and then propane is continuously introduced to flush the activated alumina layer 201, so that steam in the activated alumina layer 201 flows out along the valve port 205, and the activated alumina layer 201 is regenerated and continuously has the adsorption performance. The propane flushing can prevent the damage of high-temperature and high-concentration water vapor to the structure of the activated alumina and prolong the service life of the activated alumina.
Example 4
The flow rate of the gas source in the propane tank 203 is 10-20m3H is used as the reference value. Flushing with propane at a range of flow rates to ensure sexual oxygenThe washing effect of the aluminum oxide layer 201 can reduce the waste of propane energy.
Example 5
The heating temperature of the heater 204 is 180-350 ℃. The temperature of the activated alumina is raised to 230 ℃ by the heater and maintained for 4 hours, thereby improving the desorption effect of the activated alumina.
Example 6
A check valve 152 is disposed on the fourth pipe 151. As shown in fig. 1, the gas in the propane tank 10 is prevented from flowing backwards through the check valve 152.
The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (6)
1. A high-efficiency propane circulating drying system is characterized by comprising a propane spherical tank, a raw material pump, a propane self-tank area, a raw material pretreatment dryer, a depropanizing tower, a cold box, a deethanizing tower and a propane and propylene separation tower, wherein a discharge port of the propane spherical tank is connected with one end of the raw material pump, the other end of the raw material pump is communicated with a feed port of the propane self-tank area, a discharge port of the propane self-tank area is communicated with a feed port of the raw material pretreatment dryer through a first pipeline, a discharge port of the raw material pretreatment dryer is communicated with a feed port of the depropanizing tower through a second pipeline, a discharge port of the depropanizing tower is communicated with a feed port of the cold box, a discharge port of the cold box is communicated with a feed port of the deethanizing tower, a discharge port of the deethanizing tower is communicated with a feed port of the propane and propylene separation tower, a deethanizing tower bottom pump is connected with the bottom of the deethanizing tower, and the deethanizing tower bottom pump is communicated with the right end of the raw material pretreatment dryer through a third pipeline, and a discharge hole of the propane and propylene separating tower is communicated with a propane spherical tank through a fourth pipeline.
2. A high efficiency propane cycle drying system as claimed in claim 1 wherein said feed pretreatment dryer has an activated alumina layer therein.
3. The high-efficiency propane circulation drying system as claimed in claim 2, wherein the raw material pretreatment dryer is communicated with a propane tank through a propane pipeline, a propane outlet of the propane pipeline is positioned below the activated alumina layer, a heater is arranged in the raw material pretreatment dryer and positioned above the propane outlet, an openable valve port is arranged at the top of the pretreatment dryer, a first switch is arranged at a feed inlet of the raw material pretreatment dryer, a second switch is arranged at a discharge outlet of the raw material pretreatment dryer, and a third switch is arranged at a discharge outlet of the raw material pretreatment dryer.
4. A high efficiency propane cycle drying system as claimed in claim 3 wherein the flow of the source gas in the propane tank is 10-20m3/h。
5. The high-efficiency propane circulation drying system as claimed in claim 3, wherein the heating temperature of the heater is 180-350 ℃.
6. A high efficiency propane cycle drying system as claimed in claim 1 wherein said fourth conduit is provided with a one way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120235999.3U CN215559980U (en) | 2021-01-27 | 2021-01-27 | High efficiency propane circulation drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120235999.3U CN215559980U (en) | 2021-01-27 | 2021-01-27 | High efficiency propane circulation drying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215559980U true CN215559980U (en) | 2022-01-18 |
Family
ID=79837574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120235999.3U Expired - Fee Related CN215559980U (en) | 2021-01-27 | 2021-01-27 | High efficiency propane circulation drying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215559980U (en) |
-
2021
- 2021-01-27 CN CN202120235999.3U patent/CN215559980U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220118 |
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| CF01 | Termination of patent right due to non-payment of annual fee |