CN219010216U - Self-reflux energy-saving device of large-sized tower top air cooler in liquefied hydrocarbon rectifying tower application - Google Patents
Self-reflux energy-saving device of large-sized tower top air cooler in liquefied hydrocarbon rectifying tower application Download PDFInfo
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Abstract
The utility model relates to the technical field of liquefied hydrocarbon rectification, in particular to a self-refluxing energy-saving device of a large-scale tower top air cooler in liquefied hydrocarbon rectification tower application, which comprises a low-boiling tower, a low-boiling tower air cooler, a low-boiling tower reboiler, a high-boiling tower air cooler and a high-boiling tower reboiler, wherein a liquid phase feeding pipeline is fixedly communicated with the upper part of the low-boiling tower, a low-boiling tower gas inlet cooling pipeline is fixedly communicated between the low-boiling tower and the low-boiling tower air cooler, a gas-to-tail gas condensing pipeline is fixedly communicated with a first outlet at the bottom of the low-boiling tower air cooler, a high-boiling tower gas inlet cooling pipeline is fixedly communicated between a first outlet at the top of the high-boiling tower and a top inlet of the high-boiling tower air cooler, and a gas-to-finished product condensing pipeline is fixedly communicated with the first outlet at the bottom of the high-boiling tower air cooler. The utility model has reasonable and compact structure and convenient use, can realize the full utilization of cold energy, increases the stability of the running parameters of the rectifying tower, eliminates the safety risk of leakage of the materials of the condenser at the top of the traditional freezing water tower, and has the characteristics of safety, labor saving, simplicity and high efficiency.
Description
Technical Field
The utility model relates to the technical field of liquefied hydrocarbon rectification, in particular to a self-reflux energy-saving device of a large-sized tower top air cooler in the application of a liquefied hydrocarbon rectification tower.
Background
At present, most of the liquefied hydrocarbon rectification processes adopt a small chilled water heat exchanger to condense the top material of the rectification column into liquid reflux to the top of the rectification column, thereby establishing the top material reflux in the rectification column, and the reflux mode is divided into forced reflux and gravity self-reflux. The operation of the rectifying tower needs to maintain stable reflux quantity, so the traditional process needs to adjust the consumption of chilled water.
However, the use of chilled water control presents a significant energy consumption and a safety risk of leakage of liquefied hydrocarbons into the chilled water system. When the air cooler is applied to a condenser at the top of the rectifying tower, the change of the cooling capacity of the air cooler due to the influence of the air temperature is large, and the reflux quantity fluctuates. The rectifying tower is unstable in operation and the product quality fluctuates. In order to stabilize the reflux quantity, the reflux tank and the reflux pump are required to be increased for precise control, but the forced reflux is adopted to stabilize the reflux quantity, so that the energy consumption of the system is increased. Therefore, the condenser at the top of the liquefied hydrocarbon rectifying tower has the disadvantage of using an air cooler.
Disclosure of Invention
The utility model provides a self-reflux energy-saving device of a large-scale tower top air cooler in the application of a liquefied hydrocarbon rectifying tower, which overcomes the defects of the prior art, and can effectively solve the problems that the reflux quantity fluctuation of the existing large-scale air cooler is large, the pressure fluctuation of a rectifying system is high, the inlet and outlet pressure differences of the tower top condenser are large, the automatic reflux cannot be performed, the energy consumption of the rectifying system is high and the automatic control is difficult after the air cooler is applied.
The technical scheme of the utility model is realized by the following measures: a self-refluxing energy-saving device of a large-scale tower top air cooler in liquefied hydrocarbon rectifying tower application comprises a low-boiling tower, a low-boiling tower air cooler, a low-boiling tower reboiler, a high-boiling tower air cooler and a high-boiling tower reboiler, wherein a liquid-phase feeding pipeline is fixedly communicated between an upper first inlet of the low-boiling tower and a top inlet of the low-boiling tower air cooler, a low-tower gas-phase feeding pipeline is fixedly communicated between a lower first outlet of the low-boiling tower air cooler and a top inlet of the low-boiling tower, a gas-phase condensing pipeline is fixedly communicated between a lower second outlet of the low-boiling tower air cooler and a second inlet of the low-boiling tower, a reflux pipeline is fixedly communicated between a lower outlet of the low-boiling tower and a lower inlet of the low-boiling tower, a gas-phase reboiling pipeline is fixedly communicated between a lower outlet of the low-boiling tower reboiler and a lower inlet of the low-boiling tower, a gas-phase feeding pipeline is fixedly communicated between a lower outlet of the low-boiling tower bottom outlet and a middle inlet of the high-boiling tower, a high-phase feeding pipeline is fixedly communicated between a lower first outlet of the high-boiling tower air cooler and a top inlet of the high-boiling tower, a gas-phase feeding pipeline is fixedly communicated between a lower first outlet of the high-boiling tower air cooler and a top inlet of the high-boiling tower is fixedly communicated with a high-phase feeding pipeline, a high-phase feeding pipeline is communicated between a lower-phase outlet of the high-boiling tower and a high-boiling tower, and a high-boiling tower high-finished product is communicated with a high-quality pipeline is fixedly communicated between a high-quality pipeline.
The following are further optimizations and/or improvements to the above-described inventive solution:
the low-tower gas phase communicating pipeline is fixedly communicated between the low-tower gas phase air inlet cooling pipeline and the gas phase to tail gas condensing pipeline, and is connected with a hand valve in series.
The upper part of the low-boiling tower is provided with a first remote pressure gauge, a gas phase-tail gas condensation pipeline is fixedly provided with a first regulating valve, and the first remote pressure gauge is electrically connected with the first regulating valve.
And the reflux-to-low tower pipeline is fixedly communicated with a reflux-to-raw material tank pipeline, and the first flowmeter and the second regulating valve are electrically connected.
And a high-tower gas phase communicating pipeline is fixedly communicated between the high-tower gas phase air inlet cooling pipeline and the gas phase to finished product condensing pipeline, and a third regulating valve is fixedly arranged on the high-tower gas phase communicating pipeline.
The upper part of the high-boiling tower is provided with a second remote pressure gauge, a fourth regulating valve is fixedly arranged on a gas phase-finished product condensing pipeline, and the third regulating valve and the fourth regulating valve are electrically connected with the second remote pressure gauge.
And a second flowmeter is fixedly arranged on the reflux-to-high tower pipeline between the reflux-to-finished product tank pipeline and the high-boiling tower.
And a third flowmeter and a fifth regulating valve are sequentially and fixedly arranged on the pipeline which flows back to the finished product tank along the medium flow direction, and the second flowmeter is electrically connected with the fifth regulating valve.
The forced return pipeline is fixedly communicated between the pipeline for returning to the finished product tank and the inlet at the top of the high-boiling tower, the hand valve is connected in series on the forced return pipeline, and the hand valve is connected in series on the pipeline for returning to the finished product tank between the forced return pipeline and the fifth regulating valve.
The lower parts of the low-boiling tower and the high-boiling tower are respectively provided with a liquid level meter, and a hot water inlet pipeline and a hot water outlet pipeline are fixedly communicated with the low-boiling tower reboiler and the high-boiling tower reboiler.
The utility model has reasonable and compact structure and convenient use, can realize the full utilization of cold energy, increases the stability of the running parameters of the rectifying tower, eliminates the safety risk of leakage of the materials of the condenser at the top of the traditional freezing water tower, and has the characteristics of safety, labor saving, simplicity and high efficiency.
Drawings
FIG. 1 is a schematic diagram of the process flow of the utility model.
The codes in fig. 1 are respectively: 1 is a low boiling tower, 2 is a low tower air cooler, 3 is a low tower reboiler, 4 is a high boiling tower, 5 is a high tower air cooler, 6 is a high tower reboiler, 7 is a liquid phase feed line, 8 is a low tower gas phase feed air cooling line, 9 is a gas phase to tail gas condensing line, 10 is a reflux to low tower line, 11 is a low tower liquid phase reboiling line, 12 is a gas phase return low tower line, 13 is a liquid phase feed high tower line, 14 is a high tower gas phase feed air cooling line, 15 is a gas phase to finished product condensing line, 16 is a reflux to high tower line, 17 is a reflux to finished product tank line, 18 is a high tower liquid phase reboiling line, 19 is a gas phase return high tower line, 20 is a low tower gas phase communication line, 21 is a first remote transmission pressure gauge, 22 is a first regulating valve, 23 is a first flowmeter, 24 is a second regulating valve, 25 is a high tower gas phase communication line, 26 is a third regulating valve, 27 is a second remote transmission pressure gauge, 28 is a fourth regulating valve, 29 is a second flowmeter, 30 is a third flowmeter, 31 is a forced flow gauge, 32 is a forced flow valve, 33 is a reflux water inlet line, and 33 is a hot water pipe, 35 is a reflux tank.
Detailed Description
The present utility model is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present utility model.
In the present utility model, unless otherwise specified, the devices and apparatuses used are all known and commonly used in the art.
In the present utility model, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of fig. 1 of the specification, for example: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of fig. 1 of the specification.
The utility model is further described below with reference to examples and figures:
example 1: as shown in figure 1, the self-refluxing energy-saving device of the large-scale tower top air cooler in the application of the liquefied hydrocarbon rectifying tower comprises a low-boiling tower 1, a low-boiling tower air cooler 2, a low-boiling tower reboiler 3, a high-boiling tower 4, a high-boiling tower air cooler 5 and a high-boiling tower reboiler 6, wherein a liquid phase feeding pipeline 7 is fixedly communicated with the first inlet at the upper part of the low-boiling tower 1, a low-tower gas phase air inlet pipeline 8 is fixedly communicated between the top outlet of the low-boiling tower 1 and the top inlet of the low-boiling tower air cooler 2, a gas phase to tail gas condensing pipeline 9 is fixedly communicated with the first outlet at the bottom of the low-boiling tower air cooler 2, a reflux to low-boiling tower pipeline 10 is fixedly communicated between the second outlet at the bottom of the low-boiling tower air cooler 2 and the second inlet of the low-boiling tower 1, a low-phase reboiling pipeline 11 is fixedly communicated between the lower outlet of the lower part of the low-boiling tower reboiler 1 and the lower inlet of the low-boiling tower reboiler 3, a gas phase return low-boiling tower pipeline 13 is fixedly communicated between the upper outlet of the lower-boiling tower top of the low-boiling tower reboiler 3 and the middle inlet of the high-boiling tower air cooler 4, a liquid phase inlet pipeline 13 is fixedly communicated with the upper part of the high-boiling tower gas phase inlet of the high-boiling tower pipeline 14 is fixedly communicated with the upper-boiling tower top outlet of the high-boiling tower top of the high-boiling tower 3, a high-boiling tower top outlet of the high-boiling tower 3 is communicated with the high-boiling tower top inlet of the high-boiling tower 6, a high-boiling tower top outlet of the high-boiling tower 6 is fixedly communicated with the high-boiling tower top-finished product pipeline 6, and a high-product pipeline is fixedly communicated with the upper-high-product pipeline 6, and a high-product pipeline 16 is fixedly communicated with the upper-high-bottom pipeline 6.
The self-reflux energy-saving device of the large-scale overhead air cooler in the application of the liquefied hydrocarbon rectifying tower can be further optimized or/and improved according to actual needs:
example 2: which differs from example 1 in that: as shown in fig. 1, a low-tower gas phase communication pipeline 20 is fixedly communicated between the low-tower gas phase air inlet cooling pipeline 8 and the gas phase to tail gas condensation pipeline 9, and a hand valve is connected to the low-tower gas phase communication pipeline 20 in series.
Example 3: which differs from examples 1 to 2 in that: as shown in fig. 1, a first remote pressure gauge 21 is arranged at the upper part of the low-boiling tower 1, a first regulating valve 22 is fixedly arranged on the gas-phase-tail gas condensation pipeline 9, and the first remote pressure gauge 21 is electrically connected with the first regulating valve 22.
According to the requirement, the first remote pressure gauge 21 and the first regulating valve 22 are electrically provided with an automatic control loop, so that the top pressure of the rectifying tower can be stabilized, and the parameter stability of the rectifying tower is ensured.
Example 4: which differs from examples 1 to 3 in that: as shown in fig. 1, a first flowmeter 23 and a second regulating valve 24 are fixedly installed on the reflux low tower pipeline 10 in sequence along the medium flow direction, a reflux raw material tank pipeline 36 is fixedly communicated on the reflux low tower pipeline 10 between the first flowmeter 23 and the gas phase-tail gas condensing pipeline 9, and the first flowmeter 23 and the second regulating valve 24 are electrically connected.
According to the requirement, through adding gas phase to tail gas condensing pipeline 9, install first flowmeter 23 and second governing valve 24 additional on backward flow to low tower pipeline 10, through the automatic control return circuit, can stabilize the backward flow to low tower 1 top of a tower, the material of unnecessary condensation gets into the head tank through the regulation of first governing valve 22, solves low tower air cooler 2 and changes the undulant problem of backward flow that causes because of the air temperature changes and bring refrigerating output.
Example 5: which differs from examples 1 to 4 in that: as shown in fig. 1, a high tower gas phase communication pipeline 25 is fixedly communicated between the high tower gas phase air inlet cooling pipeline 14 and the gas phase to finished product condensing pipeline 15, and a third regulating valve 26 is fixedly arranged on the high tower gas phase communication pipeline 25.
Example 6: which differs from examples 1 to 5 in that: as shown in fig. 1, a second remote pressure gauge 27 is arranged at the upper part of the high-boiling tower 4, a fourth regulating valve 28 is fixedly arranged on the gas phase-finished product condensing pipeline 15, and the third regulating valve 26 and the fourth regulating valve 28 are electrically connected with the second remote pressure gauge 27.
According to the requirement, the third regulating valve 26 and the fourth regulating valve 28 and the second remote pressure gauge 27 are connected through an automatic control loop, qualified materials at the top of the high-boiling tower 4 directly enter a finished product condenser, the pressure difference between the top pressure of the high-boiling tower 4 and the gas phase outlet pressure of the high-boiling tower air cooler 5 is controlled to be smaller than the pressure formed by the liquid phase difference from the liquid phase outlet of the high-boiling tower air cooler 5 to the reflux liquid phase difference of the high-boiling tower 4, and the condition that the pressure difference between the inlet and outlet of the high-boiling tower air cooler 5 is overlarge and reflux cannot be established to influence the quality of products due to large-scale air cooler condensation is avoided. And the stability of the pressure at the top of the high-boiling tower 4 is controlled by the opening degree of the third regulating valve 26, so that the stability of the operation parameters of the high-boiling tower 4 is ensured.
Example 7: which differs from examples 1 to 6 in that: as shown in fig. 1, a second flowmeter 29 is fixedly installed on the reflux to high-column line 16 between the reflux to the finishing tank line 17 and the high-boiling column 4.
Example 8: which differs from examples 1 to 7 in that: as shown in fig. 1, a third flowmeter 30 and a fifth regulating valve 31 are fixedly installed on the reflux finished tank line 17 in this order along the medium flow direction, and the second flowmeter 29 is electrically connected with the fifth regulating valve 31.
According to the requirement, the first flowmeter 23 and the second regulating valve 24 are provided with reverse automatic control loops, so that the reflux flow of the reflux to the top of the tower can be stabilized, the superfluous condensed materials enter the finished product tank, the problem that the reflux flow of the high-tower air cooler 5 fluctuates due to the change of the refrigerating capacity caused by the change of the air temperature is solved, and the condensation quantity of the high-tower air cooler 5 can be visually seen through the reflux quantity of the first flowmeter 23 and the flow entering the finished product tank.
Example 9: which differs from examples 1 to 8 in that: as shown in fig. 1, a forced return line 32 is fixedly connected between the return flow to the finished tank line 17 and the top inlet of the high-boiling tower 4, a hand valve is connected in series with the forced return line 32, and a hand valve is connected in series with the return flow to the finished tank line 17 between the forced return line 32 and the fifth regulating valve 31.
The forced return line 32 is added as needed for short-term return flow establishment during maintenance and periodic inspection of the high tower air cooler 5, avoiding equipment downtime, and improving the continuous operation capacity of the equipment.
Example 10: which differs from examples 1 to 9 in that: as shown in figure 1, the lower parts of the low-boiling tower 1 and the high-boiling tower 4 are respectively provided with a liquid level meter 33, and a hot water inlet pipeline 34 and a hot water outlet pipeline 35 are respectively fixedly communicated with the low-boiling tower reboiler 3 and the high-boiling tower reboiler 6.
According to the requirements, all pipelines of the self-reflux energy-saving device of the large-scale overhead air cooler in the application of the liquefied hydrocarbon rectifying tower are fixedly provided with known valves, thermometers, pressure gauges, liquid level gauges and the like which can enable the large-scale overhead air cooler to normally operate.
The utility model can be used for the energy-saving equipment with unstable relative refrigerating capacity of the air cooler, which is used for the establishment of an automatic control system in a rectifying tower top reflux control system needing stable control, increases the stability of the operating parameters of the rectifying tower while realizing the full utilization of the refrigerating capacity, develops a new application process of the rectifying tower top air cooler, and eliminates the safety risk of the leakage of the materials of the condenser at the top of the traditional refrigerating water tower into the refrigerating water process system.
The technical characteristics form the embodiment of the utility model, have stronger adaptability and implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
Claims (10)
1. The self-refluxing energy-saving device for the large-scale tower top air cooler in the liquefied hydrocarbon rectifying tower application is characterized by comprising a low-boiling tower, a low-boiling tower air cooler, a low-boiling tower reboiler, a high-boiling tower air cooler and a high-boiling tower reboiler, wherein a liquid-phase feeding pipeline is fixedly communicated between a first inlet of the upper part of the low-boiling tower and a top inlet of the low-boiling tower air cooler, a low-tower gas-phase air inlet cooling pipeline is fixedly communicated between a first outlet of the bottom of the low-boiling tower air cooler and a tail gas condensing pipeline, a reflux-to-low-tower pipeline is fixedly communicated between a second outlet of the bottom of the low-boiling tower and a second inlet of the low-boiling tower, a low-tower liquid-phase reboiling pipeline is fixedly communicated between a lower outlet of the lower part of the low-boiling tower and a lower inlet of the low-boiling tower, a gas-phase return low-tower pipeline is fixedly communicated between a first outlet of the lower-boiling tower bottom of the low-boiling tower and a middle inlet of the high-boiling tower, a high-phase air cooling pipeline is fixedly communicated between a first outlet of the high-boiling tower and a top inlet of the high-boiling tower, a high-phase inlet of the high-boiling tower is fixedly communicated between a first outlet of the high-boiling tower and a top inlet of the high-boiling tower is fixedly communicated with a high-phase air cooler, a high-phase inlet of the high-finished product is fixedly communicated between a high-phase inlet of the high-boiling tower and a high-boiling tower.
2. The self-refluxing energy-saving device for large-scale overhead air coolers in the application of liquefied hydrocarbon rectifying towers according to claim 1, which is characterized in that a low-tower gas phase communicating pipeline is fixedly communicated between a low-tower gas phase air inlet cooling pipeline and a gas phase to tail gas condensing pipeline, and a hand valve is connected on the low-tower gas phase communicating pipeline in series.
3. The self-refluxing energy-saving device for a large-scale overhead air cooler in liquefied hydrocarbon rectifying tower application according to claim 1 or 2, wherein a first remote pressure gauge is arranged at the upper part of the low-boiling tower, a first regulating valve is fixedly arranged on a gas-to-tail gas condensing pipeline, and the first remote pressure gauge is electrically connected with the first regulating valve.
4. The self-reflux energy-saving device for a large-scale overhead air cooler in liquefied hydrocarbon rectifying tower application according to claim 1 or 2, wherein a first flowmeter and a second regulating valve are fixedly arranged on a reflux-to-low tower pipeline in sequence along a medium flow direction, a reflux-to-raw material tank pipeline is fixedly communicated on the reflux-to-low tower pipeline between the first flowmeter and a gas-phase-to-tail gas condensing pipeline, and the first flowmeter and the second regulating valve are electrically connected.
5. The self-refluxing energy-saving device for a large-scale overhead air cooler in liquefied hydrocarbon rectifying tower application according to claim 1 or 2, wherein a high-tower gas phase communicating pipeline is fixedly communicated between a high-tower gas phase air inlet cooling pipeline and a gas phase to finished product condensing pipeline, and a third regulating valve is fixedly arranged on the high-tower gas phase communicating pipeline.
6. The self-refluxing energy-saving device for a large overhead air cooler in liquefied hydrocarbon rectifying tower application according to claim 5, wherein a second remote pressure gauge is arranged at the upper part of the high-boiling tower, a fourth regulating valve is fixedly arranged on a gas phase-finished product condensing pipeline, and the third regulating valve and the fourth regulating valve are electrically connected with the second remote pressure gauge.
7. The energy-saving self-reflux device for large-scale overhead air coolers in liquefied hydrocarbon rectifying tower application according to claim 1 or 2, wherein a second flowmeter is fixedly arranged on a reflux-to-high tower pipeline between the reflux-to-finished product tank pipeline and the high-boiling tower.
8. The self-refluxing energy-saving device for large overhead air coolers in liquefied hydrocarbon rectifying tower application according to claim 7, wherein a third flowmeter and a fifth regulating valve are fixedly arranged on a pipeline which is refluxed to a finished product tank in sequence along the medium flow direction, and the second flowmeter is electrically connected with the fifth regulating valve.
9. The self-refluxing energy-saving device for large overhead air coolers in liquefied hydrocarbon rectifying tower application according to claim 8, wherein a forced reflux pipeline is fixedly communicated between a reflux pipeline to a finished product tank and an inlet at the top of the high-boiling tower, a hand valve is connected in series on the forced reflux pipeline, and the hand valve is connected in series on the reflux pipeline between the forced reflux pipeline and a fifth regulating valve.
10. The self-refluxing energy-saving device for large-scale overhead air coolers in liquefied hydrocarbon rectifying towers according to claim 1, 2, 8 or 9, wherein the lower parts of the low-boiling tower and the high-boiling tower are respectively provided with a liquid level meter, and a hot water inlet pipeline and a hot water outlet pipeline are fixedly communicated with the low-boiling tower reboiler and the high-boiling tower reboiler.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223278028.0U CN219010216U (en) | 2022-12-07 | 2022-12-07 | Self-reflux energy-saving device of large-sized tower top air cooler in liquefied hydrocarbon rectifying tower application |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223278028.0U CN219010216U (en) | 2022-12-07 | 2022-12-07 | Self-reflux energy-saving device of large-sized tower top air cooler in liquefied hydrocarbon rectifying tower application |
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| CN202223278028.0U Active CN219010216U (en) | 2022-12-07 | 2022-12-07 | Self-reflux energy-saving device of large-sized tower top air cooler in liquefied hydrocarbon rectifying tower application |
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