CN216898060U - Ethane flash distillation gas recycling device - Google Patents
Ethane flash distillation gas recycling device Download PDFInfo
- Publication number
- CN216898060U CN216898060U CN202220633714.6U CN202220633714U CN216898060U CN 216898060 U CN216898060 U CN 216898060U CN 202220633714 U CN202220633714 U CN 202220633714U CN 216898060 U CN216898060 U CN 216898060U
- Authority
- CN
- China
- Prior art keywords
- ethane
- gas
- cooler
- feed inlet
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The utility model discloses an ethane flash evaporation gas recycling device, which belongs to the technical field of chemical equipment and is characterized by comprising a low-temperature ethane tank, a reciprocating compressor, a refrigerating unit, a cooler I, a cooler II, a gas-liquid separation tank and a torch, wherein an ethane gas phase outlet is connected with a feed inlet of the reciprocating compressor, a discharge outlet of the reciprocating compressor is connected with a feed inlet of the cooler I, the cooler I is also provided with a first discharge outlet and a second discharge outlet, the first discharge outlet of the cooler I is connected with the feed inlet of the refrigerating unit, the discharge outlet of the refrigerating unit is connected with the feed inlet of the cooler II, the cooler II is connected with the feed inlet of the gas-liquid separation tank, the gas-liquid separation tank is also provided with a gas phase outlet and a liquid phase outlet, the gas phase outlet is connected with the feed inlet of the reciprocating compressor, and the liquid phase outlet is connected with the feed inlet of the low-temperature ethane tank, so that the problems of resource waste, large power consumption and the non-meeting the requirements of energy conservation and environmental protection in the prior art are solved, the method is mainly applied to the aspect of ethane recycling.
Description
Technical Field
The utility model belongs to the technical field of chemical equipment, and particularly relates to an ethane flash evaporation gas recycling device.
Background
During transportation and storage of liquid-phase ethane, part of the liquid-phase ethane is gasified and enters the storage tank to reestablish a gas-liquid-phase equilibrium state. This portion of the ethane flash gas is continuously withdrawn in order to ensure a steady pressure in the storage tank. Pumping the ethane into a compressor unit to be boosted to 1.2-1.6 MPa, further boosting the pressure of the refrigerating unit, partially condensing the compressed ethane, performing gas-liquid separation, returning a liquid phase to a low-temperature storage tank again, and returning a gas phase to a compressor inlet to ensure the pressure stability of the compressor inlet.
Although the method can recover ethane flash evaporation gas, the power consumption of the device is increased, part of the operation cost is increased, the freezing point of ethane is low at normal pressure and is about-89 ℃, the ethane flash evaporation gas can be used as a refrigerant, namely, the ethane in a gas phase is compressed and condensed and then enters a gas-liquid separation tank for gas-liquid separation, the gas phase directly returns to the inlet of a compressor, the liquid phase provides the refrigerant for a user through a throttling expansion valve, the ethane in the liquid phase is expanded and evaporated into the gas phase, and the gas phase returns to the inlet of the compressor, so that the refrigeration cycle is realized.
The part of ethane can also be used as a raw material for producing ethylene, namely, the ethane is cracked in a heating furnace and is subjected to cracking reaction in a furnace pipe at the temperature of about 900 ℃ to obtain ethylene, hydrogen and heavier components, the conventional equipment has high power consumption and does not meet the requirements of energy conservation and environmental protection, and how to reduce the production cost in recycling is also very important, so that the aim of saving energy and reducing consumption is fulfilled, and an ethane flash evaporation gas recycling device is developed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to: the utility model aims to provide an ethane flash steam recycling device to solve the technical problem of high power consumption in the background technology.
The ethane flash evaporation gas recycling device is characterized by comprising a low-temperature ethane tank, a reciprocating compressor, a refrigerating unit, a cooler I, a cooler II, a gas-liquid separation tank and a torch;
the low-temperature ethane tank is provided with a liquid-phase ethane inlet and an ethane gas-phase outlet;
the liquid-phase ethane inlet is connected with a liquid-phase ethane storage pipeline, and the liquid-phase ethane entering the low-temperature ethane tank through the ethane storage pipeline is partially gasified;
the ethane gas phase outlet is connected with a feed inlet of a reciprocating compressor, and the reciprocating compressor boosts the gas phase ethane;
the discharge port of the reciprocating compressor is connected with the feed port of the cooler I, and the boosted gas-phase ethane enters the cooler I;
the discharge port of the reciprocating compressor is provided with a pressure monitoring meter which monitors the pressure of the discharge port of the reciprocating compressor in real time;
the cooler I is also provided with a first discharge hole and a second discharge hole;
the first discharge hole of the cooler I is connected with the feed inlet of a refrigerating unit, and the refrigerating unit continuously boosts the gas-phase ethane;
a three-way flow control valve is arranged on the second discharge hole;
the three-way flow control valve is provided with a flow splitting port I, a flow splitting port II and a flow splitting port III;
the second discharge hole is connected with the flow dividing port I;
the flow dividing port I is connected with a torch feed inlet;
the discharge hole of the refrigerating unit is connected with the feed hole of the cooler II, and the gas phase ethane is partially condensed after the pressure of the refrigerating unit is boosted;
the cooler II is connected with a feed inlet of the gas-liquid separation tank;
the gas-liquid separation tank is also provided with a gas phase outlet and a liquid phase outlet;
the gas phase outlet is connected with a feed inlet of the reciprocating compressor;
and the liquid phase outlet is connected with a feed inlet of the low-temperature ethane tank.
Preferably: and the flow dividing port II is also connected with a fuel system through a pipeline, and gas-phase ethane entering the fuel system replaces natural gas for combustion.
Preferably: the flow dividing port III is also connected with a cracking furnace through a pipeline, and the cracking furnace mixes and cracks gas-phase ethane and steam.
Compared with the prior art, the utility model has the following advantages: through the transformation of the utility model, the load of the reciprocating compressor and the refrigerating unit is greatly reduced, the influence on the operation of the whole equipment due to flow fluctuation is reduced, and simultaneously, gas-phase ethane generated by transportation or storage of liquid-phase ethane is reused, thereby reducing the production cost of enterprises, meeting the requirements of energy conservation and consumption reduction, and having important effects on energy conservation and energy utilization rate improvement.
Drawings
FIG. 1 is a schematic diagram of an ethane flash gas recovery and reuse apparatus according to the present invention.
Detailed Description
The utility model is further elucidated with reference to the drawings and the embodiments.
Example 1:
as shown in fig. 1:
an ethane flash evaporation gas recycling device is characterized by comprising a low-temperature ethane tank 1, a reciprocating compressor 4, a refrigerating unit 9, a cooler I6, a cooler II 11, a gas-liquid separation tank 12 and a torch 10;
the low-temperature ethane tank 1 is provided with a liquid-phase ethane inlet 2 and an ethane gas-phase outlet 3;
the liquid-phase ethane inlet 2 is connected with a liquid-phase ethane storage pipeline;
the ethane gas phase outlet 3 is connected with a feed inlet of a reciprocating compressor 4;
the discharge hole of the reciprocating compressor 4 is connected with the feed inlet of the cooler I6;
a discharge port of the reciprocating compressor 4 is provided with a pressure monitoring meter 5;
the cooler I6 is also provided with a first discharge hole 7 and a second discharge hole 8;
the first discharge hole 7 of the cooler I6 is connected with a feed inlet of a refrigerating unit 9;
the second discharge hole 8 is provided with a three-way flow control valve 15;
the three-way flow control valve 15 is provided with a flow splitting port I16, a flow splitting port II 17 and a flow splitting port III 18;
the second discharge port 8 is connected with a flow dividing port I16;
the branch flow port I16 is connected with a feed inlet of the torch 10;
the discharge hole of the refrigerating unit 9 is connected with the feed hole of the cooler II 11;
the cooler II 11 is connected with a feed inlet of a gas-liquid separation tank 12;
the gas-liquid separation tank 12 is also provided with a gas phase outlet 13 and a liquid phase outlet 14;
the gas phase outlet 13 is connected with a feed inlet of the reciprocating compressor 4;
the liquid phase outlet 14 is connected with the feed inlet of the low-temperature ethane tank 1.
The using method of the utility model is as follows: the liquid-phase ethane entering the low-temperature ethane tank 1 through the liquid-phase ethane inlet 2 is partially gasified, at the moment, gas-phase ethane is pumped into the reciprocating compressor 4, is subjected to pressure boosting through the reciprocating compressor 4 and then is transmitted to the cooler I6 for primary cooling and then is transmitted to the refrigerating unit 9, is further boosted through the refrigerating unit 9 and then is transmitted to the cooler II 11, at the moment, part of ethane is condensed, the cooler II 11 transmits gas-liquid mixed ethane to the gas-liquid separation tank 12, the gas-liquid separation tank 12 transmits the gas-phase ethane to the reciprocating compressor 4 through the gas-phase outlet 13 for repeated boosting, the gas-liquid separation tank 12 transmits the liquid-phase ethane to the low-temperature ethane tank 1 through the liquid-phase outlet 14 for storage, when the flow is overlarge, the three-way flow control valve 15 is started, the tap I16 is used for transmitting part of the gas-phase ethane to the torch 10 for combustion.
After the compressor 4, the condenser 5, the three-phase separation tank 6 and the membrane module 9 are stopped, 99 percent of water and 1 percent of sodium hydroxide are firstly injected into the alkaline tower 1 through the liquid phase inlet 2, meanwhile, fresh nitrogen is input into the 10 items of the purification box of the alkaline washing tower 1, so that the hydrochloric acid in the tail gas is neutralized in the alkaline washing tower 1, the waste gas generated in the neutralization process is transmitted to a waste gas discharge device 12 and then transmitted to a filter 3 through an alkaline tower 1, the filtered liquid phase is directly transmitted to a separation tank 13, the separated hexane is transmitted to a hexane recovery device II 14 through the separation tank 13, the separated residual waste water is transmitted to a waste water collection device II 15, the membrane recycling compressor is stopped according to the experiment, the electricity consumption is saved by 280 ℃ per hour, 500 standard cubic nitrogen is needed to be supplemented, the calculation is planned to run for 8000 hours every year according to the standard data calculation, and the cost can be saved by 95.56 ten thousand yuan every year by adopting the design.
Example 2:
as shown in fig. 1:
an ethane flash evaporation gas recycling device is characterized by comprising a low-temperature ethane tank 1, a reciprocating compressor 4, a refrigerating unit 9, a cooler I6, a cooler II 11, a gas-liquid separation tank 12 and a torch 10;
the low-temperature ethane tank 1 is provided with a liquid-phase ethane inlet 2 and an ethane gas-phase outlet 3;
the liquid-phase ethane inlet 2 is connected with a liquid-phase ethane storage pipeline;
the ethane gas phase outlet 3 is connected with a feed inlet of a reciprocating compressor 4;
the discharge hole of the reciprocating compressor 4 is connected with the feed inlet of the cooler I6;
a discharge port of the reciprocating compressor 4 is provided with a pressure monitoring meter 5;
the cooler I6 is also provided with a first discharge hole 7 and a second discharge hole 8;
the first discharge hole 7 of the cooler I6 is connected with a feed inlet of a refrigerating unit 9;
the second discharge hole 8 is provided with a three-way flow control valve 15;
the three-way flow control valve 15 is provided with a flow splitting port I16, a flow splitting port II 17 and a flow splitting port III 18;
the second discharge port 8 is connected with a flow dividing port I16;
the branch flow port I16 is connected with a feed inlet of the torch 10;
the discharge hole of the refrigerating unit 9 is connected with the feed hole of the cooler II 11;
the cooler II 11 is connected with a feed inlet of a gas-liquid separation tank 12;
the gas-liquid separation tank 12 is also provided with a gas phase outlet 13 and a liquid phase outlet 14;
the gas phase outlet 13 is connected with a feed inlet of the reciprocating compressor 4;
the liquid phase outlet 14 is connected with a feed inlet of the low-temperature ethane tank 1;
the flow dividing port II 17 is also connected with a fuel system 19 through a pipeline;
the branch outlet III 18 is also connected with a cracking furnace 20 through a pipeline.
The using method of the utility model is as follows: the liquid ethane entering the low-temperature ethane tank 1 through the liquid ethane inlet 2 is partially gasified, at the moment, gas-phase ethane is pumped into the reciprocating compressor 4, is subjected to pressure rise through the reciprocating compressor 4 and then is transmitted to the cooler I6 for primary cooling and then is transmitted to the refrigerating unit 9, is further subjected to pressure rise through the refrigerating unit 9 and then is transmitted to the cooler II 11, at the moment, part of ethane is condensed, the cooler II 11 transmits gas-liquid mixed ethane to the gas-liquid separation tank 12, the gas-liquid separation tank 12 transmits the gas-phase ethane to the reciprocating compressor 4 through the gas-phase outlet 13 for repeated pressure rise, the gas-liquid separation tank 12 transmits the liquid-phase ethane to the low-temperature ethane tank 1 through the liquid-phase outlet 14 for storage, when the flow is overlarge, the flow rate is started up through the branch ports II 17 and III 18 of the three-way flow control valve 15, the branch ports II 17 transmits part of the gas-phase ethane to the cracking furnace 20, and the cracking furnace 20 mixes and cracks the gas-phase ethane and steam, the split stream iii 18 delivers part of the gas phase ethane to the combustion system 19, and the gas phase ethane entering the combustion system 19 is combusted instead of natural gas.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the utility model and these modifications should also be considered as the protection scope of the utility model.
Claims (3)
1. The utility model provides an ethane flash distillation gas recovery recycles device which characterized in that: comprises a low-temperature ethane tank (1), a reciprocating compressor (4), a refrigerating unit (9), a cooler I (6), a cooler II (11), a gas-liquid separation tank (12) and a torch (10);
the low-temperature ethane tank (1) is provided with a liquid-phase ethane inlet (2) and an ethane gas-phase outlet (3);
the liquid-phase ethane inlet (2) is connected with a liquid-phase ethane storage pipeline;
the ethane gas phase outlet (3) is connected with a feed inlet of the reciprocating compressor (4);
the discharge hole of the reciprocating compressor (4) is connected with the feed hole of the cooler I (6);
a discharge hole of the reciprocating compressor (4) is provided with a pressure monitoring meter (5);
the cooler I (6) is also provided with a first discharge hole (7) and a second discharge hole (8);
the first discharge hole (7) of the cooler I (6) is connected with a feed inlet of a refrigerating unit (9);
a three-way flow control valve (15) is arranged on the second discharge hole (8);
the three-way flow control valve (15) is provided with a flow splitting port I (16), a flow splitting port II (17) and a flow splitting port III (18);
the second discharge hole (8) is connected with a flow dividing port I (16);
the flow dividing port I (16) is connected with a feed inlet of a torch (10);
the discharge hole of the refrigerating unit (9) is connected with the feed hole of the cooler II (11);
the cooler II (11) is connected with a feed inlet of the gas-liquid separation tank (12);
the gas-liquid separation tank (12) is also provided with a gas phase outlet (13) and a liquid phase outlet (14);
the gas phase outlet (13) is connected with a feed inlet of the reciprocating compressor (4);
the liquid phase outlet (14) is connected with a feed inlet of the low-temperature ethane tank (1).
2. The ethane flash gas recycling device according to claim 1, characterized in that: the flow dividing port II (17) is also connected with a fuel system (19) through a pipeline.
3. The ethane flash gas recycling device according to claim 2, characterized in that: the branch opening III (18) is also connected with a cracking furnace (20) through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220633714.6U CN216898060U (en) | 2022-03-22 | 2022-03-22 | Ethane flash distillation gas recycling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220633714.6U CN216898060U (en) | 2022-03-22 | 2022-03-22 | Ethane flash distillation gas recycling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216898060U true CN216898060U (en) | 2022-07-05 |
Family
ID=82194001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220633714.6U Active CN216898060U (en) | 2022-03-22 | 2022-03-22 | Ethane flash distillation gas recycling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216898060U (en) |
-
2022
- 2022-03-22 CN CN202220633714.6U patent/CN216898060U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113175687A (en) | Flue gas carbon dioxide capturing and purifying system and method | |
| CN216898060U (en) | Ethane flash distillation gas recycling device | |
| CN109826674B (en) | Combined cycle power generation system for iron and steel enterprises | |
| CN112239390B (en) | Ethylene cryogenic recovery system | |
| CN108331627B (en) | Single-cycle two-stage LNG cold energy power generation and ice making method and system | |
| CN108726536A (en) | A kind of system and method for producing liquefied ammonia using soda manufacture process steam condensation fluid residual heat | |
| CN108759302B (en) | High-pressure natural gas liquefaction system and method | |
| CN208732629U (en) | A kind of system for producing liquefied ammonia using soda manufacture process steam condensation fluid residual heat | |
| CN203731092U (en) | Device for pressurizing raw natural gas by using natural gas pipeline network pressure energy | |
| CN203375762U (en) | Combined cooling device with low-grade heat source obtaining cooling capacity | |
| CN108384594B (en) | Process and device for purifying Fischer-Tropsch synthesis tail gas and recovering light hydrocarbon | |
| CN213708185U (en) | Ethylene cryogenic recovery system | |
| CN105698005A (en) | Natural gas pressure difference energy recovery-LNG production system and process | |
| CN106679243B (en) | Refrigerating system capable of reducing liquid ammonia consumption | |
| CN114688756B (en) | Efficient refrigerating device and process for coal-based natural gas by using low-temperature waste heat | |
| CN112361715B (en) | Cryogenic ethylene recovery process | |
| CN218853480U (en) | Urea production system for comprehensively utilizing waste heat of steam condensate | |
| CN204718297U (en) | Diffuse gas utilization device and natural gas pipe network pressure energy recycling system | |
| CN214693386U (en) | Device for graded utilization of coal chemical industry gasified black water heat | |
| CN217383362U (en) | Waste heat recycling device in coal hydrogen production process | |
| CN218884394U (en) | Propylene refrigerating system based on liquid nitrogen | |
| CN219730596U (en) | Wastewater zero-emission system based on supercritical CO2 multistage heat recovery coupling low-temperature flash evaporation | |
| CN219511310U (en) | Steam recycling system | |
| CN112374957B (en) | Ethylene recycling method | |
| CN219559573U (en) | Hot water recycling system for vinyl chloride synthesis reaction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |