CN114210082A - System and method capable of accelerating start of propylene rectifying tower - Google Patents
System and method capable of accelerating start of propylene rectifying tower Download PDFInfo
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- CN114210082A CN114210082A CN202111639693.5A CN202111639693A CN114210082A CN 114210082 A CN114210082 A CN 114210082A CN 202111639693 A CN202111639693 A CN 202111639693A CN 114210082 A CN114210082 A CN 114210082A
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- propylene
- rectifying tower
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- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 title claims abstract description 199
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 title claims abstract description 199
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000010992 reflux Methods 0.000 claims abstract description 97
- 230000001681 protective effect Effects 0.000 claims abstract description 44
- 239000007791 liquid phase Substances 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims description 8
- 150000001336 alkenes Chemical class 0.000 claims description 4
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000012071 phase Substances 0.000 abstract description 6
- 239000000047 product Substances 0.000 description 26
- 239000013589 supplement Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 238000012797 qualification Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 235000013533 rum Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
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- Chemical Kinetics & Catalysis (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The invention discloses a system capable of accelerating the start-up of a propylene rectifying tower, which comprises a reflux system and a protective bed system, wherein the reflux system comprises a reflux tank, the protective bed system comprises a protective bed, a cooler, a propylene tank area and an A overline pipeline, the A pipeline is arranged between the protective bed and the cooler, the B pipeline is arranged between the protective bed and the propylene tank area, one end of the A overline pipeline is connected with the A pipeline, the other end of the A overline pipeline is connected with the B pipeline, and the reflux tank is connected with the cooler pipeline; simultaneously, the method for accelerating the start-up of the propylene rectifying tower is also disclosed. The invention completes the rapid gas-phase pressurizing and liquid-phase propylene replenishing during the start-up of the propylene rectifying tower, completely meets the start-up conditions, shortens the qualified time of propylene products and improves the economic benefit.
Description
Technical Field
The invention relates to a system and a method capable of accelerating the start-up of a propylene rectifying tower, and belongs to the technical field of propylene rectifying towers.
Background
According to the process design of U.S. Rumes, the propylene rectifying tower is provided with two 3 'propylene liquid lines, because the propylene rectifying tower needs to supplement 50 tons of gas-phase propylene for solid gas-phase mass transfer during the start-up period, and 600 tons of liquid-phase propylene are introduced to realize the cycle establishment of the propylene rectifying tower, the start-up condition can not be completely met by only depending on the two 3' propylene liquid lines (about 15t/h and conflicting with the liquid supplement of a propylene machine), the qualified time of propylene products is prolonged, and the economic benefit is reduced.
Disclosure of Invention
The invention aims to provide a system and a method for accelerating the start-up of a propylene rectifying tower, which can complete the rapid gas-phase pressurizing and liquid-phase propylene supplement during the start-up of the propylene rectifying tower, completely meet the start-up conditions, shorten the qualified time of propylene products and improve the economic benefit.
In order to solve the technical problems, the invention adopts the following technical scheme: a system capable of accelerating the start-up of a propylene rectifying tower comprises a reflux system and a protective bed system, wherein the reflux system comprises a reflux tank, the protective bed system comprises a protective bed, a cooler, a propylene tank area and an A cross-line pipeline, the A pipeline is arranged between the protective bed and the cooler, the B pipeline is arranged between the protective bed and the propylene tank area, one end of the A cross-line pipeline is connected to the A pipeline, the other end of the A cross-line pipeline is connected to the B pipeline, and the reflux tank is connected with the cooler pipeline; the rapid gas-phase pressurizing and liquid-phase propylene replenishing during the start of the propylene rectifying tower are completed, the start conditions are completely met, the qualified time of propylene products is shortened, and the economic benefit is improved.
The utility model provides a system for can accelerate start-up of propylene rectifying column, reflux system still includes propylene rectifying column A condenser and propylene rectifying column B condenser, be provided with C pipeline and D pipeline between propylene rectifying column A condenser and the propylene rectifying column B condenser, be provided with E pipeline and F pipeline on the reflux tank, the one end and the reflux tank of E pipeline are connected, the other end of E pipeline is connected in the D pipeline, the one end and the reflux tank of F pipeline are connected, the other end of F pipeline is connected with propylene rectifying column, is provided with propylene rectifying column backwash pump on the F pipeline.
According to the system capable of accelerating the start-up of the propylene rectifying tower, the pipeline B is provided with a pipeline B across lines.
The utility model provides a system for can accelerate propylene rectifying column driving, be provided with the G pipeline on the cooler, the one end and the cooler of G pipeline are connected, and the other end of G pipeline is connected in the F pipeline, is provided with the H pipeline on the G pipeline, and the exit of H pipeline all is connected in the G pipeline, is provided with propylene product pump on the G pipeline, and propylene product pump arranges in between the exit of H pipeline.
The utility model provides a system for can accelerate propylene rectifying column driving, be provided with the A blind plate on the B pipeline, be provided with the B blind plate on the A overline pipeline, the A valve has set gradually on the B pipeline, the B valve, the C valve, the D valve, E valve and F valve, the A blind plate is arranged in on the pipeline section between A valve and the B valve, be provided with the G valve on the B overline pipeline, the pipeline section between A blind plate and the B valve is all arranged in at the both ends of B overline pipeline, the one end that is close to the protection bed is arranged in to the F valve, H valve and I valve have set gradually on the A overline pipeline, the B blind plate is arranged in on the pipeline section between H valve and the I valve.
According to the system capable of accelerating the start-up of the propylene rectifying tower, the C blind plate is arranged on the H pipeline, the J valve is arranged on the G pipeline, the K valve and the L valve are arranged on the H pipeline, the C blind plate is arranged on the pipe section between the K valve and the L valve, and one end of the G pipeline is arranged on the pipe section between the J valve and the propylene product pump.
The system capable of accelerating the start of the propylene rectifying tower is characterized in that an M valve, an N valve, a P valve, a Q valve and an R valve are sequentially arranged on the F pipeline, the M valve is arranged at one end close to the reflux tank, a C cross-line pipeline is connected to a pipe section between the Q valve and the R valve, and an S valve is arranged on the C cross-line pipeline.
A method for accelerating the start-up of a propylene rectifying tower comprises the following steps:
s1, before starting work, confirming that three blind plates A, B and C are in an open state, dismantling the valve core of the J valve on the G pipeline, and ensuring that all valves are in a closed state;
s2, liquid-phase propylene reversely enters a propylene product line through a propylene pump minimum flow return line of a propylene tank area to reach a pipeline boundary area of the olefin separation device, the valve A, the valve G, the valve B, the valve C, the valve D, the valve E and the valve F on the cross-line pipeline B are slowly opened, and the liquid-phase propylene reaches an outlet pipeline of the protective bed through the pipeline B;
s3, slowly opening an H valve and an I valve on the A overline pipeline, and enabling the liquid-phase propylene to reach the front of a cooler through the A overline pipeline;
s4, allowing the liquid-phase propylene to reversely pass through a cooler, sequentially flowing through a pipeline G and a pipeline H, slowly opening a valve K and a valve L of the pipeline, and allowing the liquid-phase propylene to reach an inlet pipeline of a propylene product pump;
s5, slowly opening the valve M and the valve N of the pipeline, enabling the liquid phase propylene to reach the inlet of a reflux pump of the propylene rectifying tower and enter a reflux tank;
and S6, when the liquid level of the reflux tank is higher than 50%, starting a reflux pump of the propylene rectifying tower, and slowly opening a valve P of the pipeline, a valve Q of the pipeline, an valve S of the C overline pipeline and a valve R of the C overline pipeline to introduce liquid-phase propylene into the propylene rectifying tower.
Compared with the prior art, the invention adds the cross-line pipeline on the one-way valve of the propylene product extraction line boundary area, adds the B cross-line pipeline on the propylene protection bed, realizes the rapid liquid supplement (about 50t/h) of the propylene rectifying tower by carrying out the reverse outward delivery of propylene by the propylene pump in the tank area during the start-up period, shortens the cycle establishment of the propylene rectifying tower from 40h before optimization to 12h, creates good conditions for the rapid qualification of the propylene product, completes the rapid gas-phase pressurizing and liquid-phase propylene supplement during the start-up of the propylene rectifying tower, completely meets the start-up conditions, shortens the qualification time of the propylene product, and improves the economic benefit.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the reflux system of the present invention;
FIG. 3 is a schematic view of the structure of the guard bed system of the present invention.
Reference numerals: 1-reflux system, 2-guard bed system, 3-reflux drum, 4-guard bed, 5-cooler, 6-propylene drum zone, 7-A cross-line pipeline, 8-A pipeline, 9-B pipeline, 10-propylene rectifying tower A condenser, 11-propylene rectifying tower B condenser, 12-C pipeline, 13-D pipeline, 14-E pipeline, 15-F pipeline, 16-propylene rectifying tower, 17-propylene rectifying tower reflux pump, 18-B cross-line pipeline, 19-G pipeline, 20-H pipeline, 21-propylene product pump, 22-A blind plate, 23-B blind plate, 24-A valve, 25-B valve, 26-C valve, 27-D valve, 28-E valve, 29-F valve, the valve comprises a 30-G valve, a 31-H valve, a 32-I valve, a 33-C blind plate, a 34-J valve, a 35-K valve, a 36-L valve, a 37-M valve, a 38-N valve, a 39-P valve, a 40-Q valve, a 41-R valve, a 42-C cross-line pipeline and a 43-S valve.
The invention is further described with reference to the following figures and detailed description.
Detailed Description
Example 1 of the invention: the utility model provides a system for can accelerate start of propylene rectifying column, includes reflux system 1 and protection bed system 2, reflux system 1 includes backflow tank 3, and protection bed system 2 is including protection bed 4, cooler 5, propylene jar district 6 and A overline pipeline 7, be provided with A pipeline 8 between protection bed 4 and the cooler 5, be provided with B pipeline 9 between protection bed 4 and the propylene jar district 6, the one end of A overline pipeline 7 is connected in A pipeline 8, and the other end of A overline pipeline 7 is connected in B pipeline 9, backflow tank 3 and 5 pipe connection of cooler.
Example 2 of the invention: a system capable of accelerating start-up of a propylene rectifying tower comprises a reflux system 1 and a protective bed system 2, wherein the reflux system 1 comprises a reflux tank 3, the protective bed system 2 comprises a protective bed 4, a cooler 5, a propylene tank area 6 and an A overline pipeline 7, an A pipeline 8 is arranged between the protective bed 4 and the cooler 5, a B pipeline 9 is arranged between the protective bed 4 and the propylene tank area 6, one end of the A overline pipeline 7 is connected to the A pipeline 8, the other end of the A overline pipeline 7 is connected to the B pipeline 9, and the reflux tank 3 is connected with the cooler 5 through a pipeline; reflux system 1 still includes propylene rectifying column A condenser 10 and propylene rectifying column B condenser 11, be provided with C pipeline 12 and D pipeline 13 between propylene rectifying column A condenser 10 and the propylene rectifying column B condenser 11, be provided with E pipeline 14 and F pipeline 15 on the reflux drum 3, the one end and the reflux drum 3 of E pipeline 14 are connected, the other end of E pipeline 14 is connected in D pipeline 13, the one end and the reflux drum 3 of F pipeline 15 are connected, the other end of F pipeline 15 is connected with propylene rectifying column 16, be provided with propylene rectifying column reflux pump 17 on the F pipeline 15.
Example 3 of the invention: a system capable of accelerating start-up of a propylene rectifying tower comprises a reflux system 1 and a protective bed system 2, wherein the reflux system 1 comprises a reflux tank 3, the protective bed system 2 comprises a protective bed 4, a cooler 5, a propylene tank area 6 and an A overline pipeline 7, an A pipeline 8 is arranged between the protective bed 4 and the cooler 5, a B pipeline 9 is arranged between the protective bed 4 and the propylene tank area 6, one end of the A overline pipeline 7 is connected to the A pipeline 8, the other end of the A overline pipeline 7 is connected to the B pipeline 9, and the reflux tank 3 is connected with the cooler 5 through a pipeline; the reflux system 1 further comprises a propylene rectifying tower A condenser 10 and a propylene rectifying tower B condenser 11, a C pipeline 12 and a D pipeline 13 are arranged between the propylene rectifying tower A condenser 10 and the propylene rectifying tower B condenser 11, an E pipeline 14 and an F pipeline 15 are arranged on the reflux tank 3, one end of the E pipeline 14 is connected with the reflux tank 3, the other end of the E pipeline 14 is connected with the D pipeline 13, one end of the F pipeline 15 is connected with the reflux tank 3, the other end of the F pipeline 15 is connected with a propylene rectifying tower 16, and a propylene rectifying tower reflux pump 17 is arranged on the F pipeline 15; and a B overline pipeline 18 is arranged on the B pipeline 9.
Example 4 of the invention: a system capable of accelerating start-up of a propylene rectifying tower comprises a reflux system 1 and a protective bed system 2, wherein the reflux system 1 comprises a reflux tank 3, the protective bed system 2 comprises a protective bed 4, a cooler 5, a propylene tank area 6 and an A overline pipeline 7, an A pipeline 8 is arranged between the protective bed 4 and the cooler 5, a B pipeline 9 is arranged between the protective bed 4 and the propylene tank area 6, one end of the A overline pipeline 7 is connected to the A pipeline 8, the other end of the A overline pipeline 7 is connected to the B pipeline 9, and the reflux tank 3 is connected with the cooler 5 through a pipeline; the reflux system 1 further comprises a propylene rectifying tower A condenser 10 and a propylene rectifying tower B condenser 11, a C pipeline 12 and a D pipeline 13 are arranged between the propylene rectifying tower A condenser 10 and the propylene rectifying tower B condenser 11, an E pipeline 14 and an F pipeline 15 are arranged on the reflux tank 3, one end of the E pipeline 14 is connected with the reflux tank 3, the other end of the E pipeline 14 is connected with the D pipeline 13, one end of the F pipeline 15 is connected with the reflux tank 3, the other end of the F pipeline 15 is connected with a propylene rectifying tower 16, and a propylene rectifying tower reflux pump 17 is arranged on the F pipeline 15; a B overline pipeline 18 is arranged on the B pipeline 9; the cooling device is characterized in that a G pipeline 19 is arranged on the cooling device 5, one end of the G pipeline 19 is connected with the cooling device 5, the other end of the G pipeline 19 is connected with the F pipeline 15, an H pipeline 20 is arranged on the G pipeline 19, the inlet and the outlet of the H pipeline 20 are connected with the G pipeline 19, a propylene product pump 21 is arranged on the G pipeline 19, and the propylene product pump 21 is arranged between the inlet and the outlet of the H pipeline 20.
Example 5 of the invention: a system capable of accelerating start-up of a propylene rectifying tower comprises a reflux system 1 and a protective bed system 2, wherein the reflux system 1 comprises a reflux tank 3, the protective bed system 2 comprises a protective bed 4, a cooler 5, a propylene tank area 6 and an A overline pipeline 7, an A pipeline 8 is arranged between the protective bed 4 and the cooler 5, a B pipeline 9 is arranged between the protective bed 4 and the propylene tank area 6, one end of the A overline pipeline 7 is connected to the A pipeline 8, the other end of the A overline pipeline 7 is connected to the B pipeline 9, and the reflux tank 3 is connected with the cooler 5 through a pipeline; the reflux system 1 further comprises a propylene rectifying tower A condenser 10 and a propylene rectifying tower B condenser 11, a C pipeline 12 and a D pipeline 13 are arranged between the propylene rectifying tower A condenser 10 and the propylene rectifying tower B condenser 11, an E pipeline 14 and an F pipeline 15 are arranged on the reflux tank 3, one end of the E pipeline 14 is connected with the reflux tank 3, the other end of the E pipeline 14 is connected with the D pipeline 13, one end of the F pipeline 15 is connected with the reflux tank 3, the other end of the F pipeline 15 is connected with a propylene rectifying tower 16, and a propylene rectifying tower reflux pump 17 is arranged on the F pipeline 15; a B overline pipeline 18 is arranged on the B pipeline 9; the cooler 5 is provided with a G pipeline 19, one end of the G pipeline 19 is connected with the cooler 5, the other end of the G pipeline 19 is connected with the F pipeline 15, the G pipeline 19 is provided with an H pipeline 20, the inlet and the outlet of the H pipeline 20 are connected with the G pipeline 19, the G pipeline 19 is provided with a propylene product pump 21, and the propylene product pump 21 is arranged between the inlet and the outlet of the H pipeline 20; the pipeline B is characterized in that a blind plate A22 is arranged on the pipeline B9, a blind plate B23 is arranged on the pipeline A7, a valve A24, a valve B25, a valve C26, a valve D27, a valve E28 and a valve F29 are sequentially arranged on the pipeline B9, the blind plate A22 is arranged on a pipe section between the valve A24 and the valve B25, a valve G30 is arranged on the pipeline B18, two ends of the pipeline B18 are arranged on a pipe section between the blind plate A22 and the valve B25, the valve F29 is arranged at one end close to the protection bed 4, a valve H31 and a valve I32 are sequentially arranged on the pipeline A7, and the blind plate B23 is arranged on a pipe section between the valve H31 and the valve I32.
Example 6 of the invention: a system capable of accelerating start-up of a propylene rectifying tower comprises a reflux system 1 and a protective bed system 2, wherein the reflux system 1 comprises a reflux tank 3, the protective bed system 2 comprises a protective bed 4, a cooler 5, a propylene tank area 6 and an A overline pipeline 7, an A pipeline 8 is arranged between the protective bed 4 and the cooler 5, a B pipeline 9 is arranged between the protective bed 4 and the propylene tank area 6, one end of the A overline pipeline 7 is connected to the A pipeline 8, the other end of the A overline pipeline 7 is connected to the B pipeline 9, and the reflux tank 3 is connected with the cooler 5 through a pipeline; the reflux system 1 further comprises a propylene rectifying tower A condenser 10 and a propylene rectifying tower B condenser 11, a C pipeline 12 and a D pipeline 13 are arranged between the propylene rectifying tower A condenser 10 and the propylene rectifying tower B condenser 11, an E pipeline 14 and an F pipeline 15 are arranged on the reflux tank 3, one end of the E pipeline 14 is connected with the reflux tank 3, the other end of the E pipeline 14 is connected with the D pipeline 13, one end of the F pipeline 15 is connected with the reflux tank 3, the other end of the F pipeline 15 is connected with a propylene rectifying tower 16, and a propylene rectifying tower reflux pump 17 is arranged on the F pipeline 15; a B overline pipeline 18 is arranged on the B pipeline 9; the cooler 5 is provided with a G pipeline 19, one end of the G pipeline 19 is connected with the cooler 5, the other end of the G pipeline 19 is connected with the F pipeline 15, the G pipeline 19 is provided with an H pipeline 20, the inlet and the outlet of the H pipeline 20 are connected with the G pipeline 19, the G pipeline 19 is provided with a propylene product pump 21, and the propylene product pump 21 is arranged between the inlet and the outlet of the H pipeline 20; the B pipeline 9 is provided with an A blind plate 22, the A cross line pipeline 7 is provided with a B blind plate 23, the B pipeline 9 is sequentially provided with an A valve 24, a B valve 25, a C valve 26, a D valve 27, an E valve 28 and an F valve 29, the A blind plate 22 is arranged on a pipe section between the A valve 24 and the B valve 25, the B cross line pipeline 18 is provided with a G valve 30, two ends of the B cross line pipeline 18 are arranged on a pipe section between the A blind plate 22 and the B valve 25, the F valve 29 is arranged at one end close to the protection bed 4, the A cross line pipeline 7 is sequentially provided with an H valve 31 and an I valve 32, and the B blind plate 23 is arranged on a pipe section between the H valve 31 and the I valve 32; the H pipeline 20 is provided with a C blind plate 33, the G pipeline 19 is provided with a J valve 34, the H pipeline 20 is provided with a K valve 35 and an L valve 36, the C blind plate 33 is arranged on a pipe section between the K valve 35 and the L valve 36, and one end of the G pipeline 19 is arranged on a pipe section between the J valve 34 and the propylene product pump 21.
Example 7 of the invention: a system capable of accelerating start-up of a propylene rectifying tower comprises a reflux system 1 and a protective bed system 2, wherein the reflux system 1 comprises a reflux tank 3, the protective bed system 2 comprises a protective bed 4, a cooler 5, a propylene tank area 6 and an A overline pipeline 7, an A pipeline 8 is arranged between the protective bed 4 and the cooler 5, a B pipeline 9 is arranged between the protective bed 4 and the propylene tank area 6, one end of the A overline pipeline 7 is connected to the A pipeline 8, the other end of the A overline pipeline 7 is connected to the B pipeline 9, and the reflux tank 3 is connected with the cooler 5 through a pipeline; the reflux system 1 further comprises a propylene rectifying tower A condenser 10 and a propylene rectifying tower B condenser 11, a C pipeline 12 and a D pipeline 13 are arranged between the propylene rectifying tower A condenser 10 and the propylene rectifying tower B condenser 11, an E pipeline 14 and an F pipeline 15 are arranged on the reflux tank 3, one end of the E pipeline 14 is connected with the reflux tank 3, the other end of the E pipeline 14 is connected with the D pipeline 13, one end of the F pipeline 15 is connected with the reflux tank 3, the other end of the F pipeline 15 is connected with a propylene rectifying tower 16, and a propylene rectifying tower reflux pump 17 is arranged on the F pipeline 15; a B overline pipeline 18 is arranged on the B pipeline 9; the cooler 5 is provided with a G pipeline 19, one end of the G pipeline 19 is connected with the cooler 5, the other end of the G pipeline 19 is connected with the F pipeline 15, the G pipeline 19 is provided with an H pipeline 20, the inlet and the outlet of the H pipeline 20 are connected with the G pipeline 19, the G pipeline 19 is provided with a propylene product pump 21, and the propylene product pump 21 is arranged between the inlet and the outlet of the H pipeline 20; the B pipeline 9 is provided with an A blind plate 22, the A cross line pipeline 7 is provided with a B blind plate 23, the B pipeline 9 is sequentially provided with an A valve 24, a B valve 25, a C valve 26, a D valve 27, an E valve 28 and an F valve 29, the A blind plate 22 is arranged on a pipe section between the A valve 24 and the B valve 25, the B cross line pipeline 18 is provided with a G valve 30, two ends of the B cross line pipeline 18 are arranged on a pipe section between the A blind plate 22 and the B valve 25, the F valve 29 is arranged at one end close to the protection bed 4, the A cross line pipeline 7 is sequentially provided with an H valve 31 and an I valve 32, and the B blind plate 23 is arranged on a pipe section between the H valve 31 and the I valve 32; the H pipeline 20 is provided with a C blind plate 33, the G pipeline 19 is provided with a J valve 34, the H pipeline 20 is provided with a K valve 35 and an L valve 36, the C blind plate 33 is arranged on a pipe section between the K valve 35 and the L valve 36, and one end of the G pipeline 19 is arranged on a pipe section between the J valve 34 and the propylene product pump 21; the F pipeline 15 is sequentially provided with an M valve 37, an N valve 38, a P valve 39, a Q valve 40 and an R valve 41, the M valve 37 is arranged at one end close to the backflow tank 3, a pipe section between the Q valve 40 and the R valve 41 is connected with a C cross-line pipeline 42, and the C cross-line pipeline 42 is provided with an S valve 43.
A method for accelerating the start-up of a propylene rectifying tower comprises the following steps:
s1, before starting work, three blind plates A22, B23 and C33 are confirmed to be in an open state, the valve core of the J valve 34 on the G pipeline 19 is removed, and all valves are ensured to be in a closed state;
s2, liquid-phase propylene reversely enters a propylene product line through a propylene pump minimum flow return line of a propylene tank area 6 to reach a pipeline boundary area of an olefin separation device, at the moment, a valve A24, a valve G30, a valve B25, a valve C26, a valve D27, a valve E28 and a valve F29 on a cross-line pipeline 18 of the valve B are slowly opened, and the liquid-phase propylene reaches an outlet pipeline of a protective bed 4 through a pipeline B9;
s3, slowly opening the H valve 31 and the I valve 32 on the A overline pipeline 7, and enabling the liquid-phase propylene to reach the front of the cooler 5 through the A overline pipeline 7;
s4, allowing the liquid phase propylene to reversely pass through the cooler 5, sequentially flowing through the G pipeline 19 and the H pipeline 20, slowly opening the K valve 35 and the L valve 36 of the pipeline, and allowing the liquid phase propylene to reach an inlet pipeline of the propylene product pump 21;
s5, slowly opening the valve M37 and the valve N38 of the pipeline, enabling the liquid phase propylene to reach the inlet of the reflux pump 17 of the propylene rectifying tower and enter the reflux tank 3;
s6, when the liquid level of the reflux tank 3 is higher than 50%, starting the reflux pump 17 of the propylene rectification tower, and slowly opening the valve 39 of the pipeline P, the valve 40 of the Q, the valve 43 of the S on the pipeline 42 of the C and the valve 41 of the R to introduce the liquid phase propylene into the propylene rectification tower 16.
The working principle of one embodiment of the invention is as follows: when the valve is in work, three blind plates A22, B23 and C33 are confirmed to be in the open state before the valve is started, the valve core of the J valve 34 on the G pipeline 19 is removed, and all the valves are ensured to be in the closed state; liquid phase propylene reversely enters a propylene product line through a propylene pump minimum flow return line of the propylene tank area 6 to reach a pipeline boundary area of the olefin separation device, at the moment, a valve A24, a valve G30, a valve B25, a valve C26, a valve D27, a valve E28 and a valve F29 on a cross-line pipeline 18 are slowly opened, and the liquid phase propylene reaches an outlet pipeline of the protective bed 4 through a pipeline B9; slowly opening an H valve 31 and an I valve 32 on the A overline pipeline 7, and leading the liquid phase propylene to reach the cooler 5 through the A overline pipeline 7; the liquid phase propylene reversely passes through the cooler 5, sequentially flows through the G pipeline 19 and the H pipeline 20, the K valve 35 and the L valve 36 of the pipeline are slowly opened, and the liquid phase propylene reaches an inlet pipeline of the propylene product pump 21; slowly opening a valve M37 and a valve N38 of the pipeline, and enabling the liquid-phase propylene to reach an inlet of a reflux pump 17 of the propylene rectifying tower and enter the reflux tank 3; when the liquid level of the reflux tank 3 is higher than 50%, the reflux pump 17 of the propylene rectification tower is started, and at the moment, the valve 39 of the pipeline P, the valve 40 of the pipeline Q, the valve 43 of the S on the pipeline 42 of the C cross line and the valve 41 of the R are slowly opened to introduce the liquid phase propylene into the propylene rectification tower 16.
Claims (8)
1. The utility model provides a system for can accelerate start-up of propylene rectifying column, includes reflux system (1) and protection bed system (2), its characterized in that, reflux system (1) is including backward flow jar (3), and protection bed system (2) is including protection bed (4), cooler (5), propylene jar district (6) and A pipeline (7) of striding, be provided with A pipeline (8) between protection bed (4) and cooler (5), be provided with B pipeline (9) between protection bed (4) and propylene jar district (6), the one end of A pipeline (7) of striding is connected in A pipeline (8), and the other end of A pipeline (7) of striding is connected in B pipeline (9), backward flow jar (3) and cooler (5) pipe connection.
2. The system capable of accelerating the start-up of the propylene rectifying tower as claimed in claim 1, wherein the reflux system (1) further comprises a propylene rectifying tower A condenser (10) and a propylene rectifying tower B condenser (11), a C pipeline (12) and a D pipeline (13) are arranged between the propylene rectifying tower A condenser (10) and the propylene rectifying tower B condenser (11), an E pipeline (14) and an F pipeline (15) are arranged on the reflux tank (3), one end of the E pipeline (14) is connected with the reflux tank (3), the other end of the E pipeline (14) is connected with the D pipeline (13), one end of the F pipeline (15) is connected with the reflux tank (3), the other end of the F pipeline (15) is connected with the propylene rectifying tower (16), and a propylene rectifying tower reflux pump (17) is arranged on the F pipeline (15).
3. The system for accelerating the start-up of the propylene rectifying tower as recited in claim 1, wherein the B pipeline (9) is provided with a B overline pipeline (18).
4. The system capable of accelerating the start-up of the propylene rectifying tower as claimed in claim 2, wherein a G pipeline (19) is arranged on the cooler (5), one end of the G pipeline (19) is connected with the cooler (5), the other end of the G pipeline (19) is connected with the F pipeline (15), an H pipeline (20) is arranged on the G pipeline (19), the inlet and the outlet of the H pipeline (20) are connected with the G pipeline (19), a propylene product pump (21) is arranged on the G pipeline (19), and the propylene product pump (21) is arranged between the inlet and the outlet of the H pipeline (20).
5. The system for accelerating the start-up of a propylene rectifying tower according to claim 3, the pipeline B is characterized in that an A blind plate (22) is arranged on the pipeline B (9), a B blind plate (23) is arranged on the A cross-line pipeline (7), an A valve (24), a B valve (25), a C valve (26), a D valve (27), an E valve (28) and an F valve (29) are sequentially arranged on the pipeline B (9), the A blind plate (22) is arranged on a pipeline section between the A valve (24) and the B valve (25), a G valve (30) is arranged on the B cross-line pipeline (18), two ends of the B cross-line pipeline (18) are arranged on a pipeline section between the A blind plate (22) and the B valve (25), the F valve (29) is arranged at one end close to the protection bed (4), an H valve (31) and an I valve (32) are sequentially arranged on the A cross-line pipeline (7), and the B blind plate (23) is arranged on a pipeline section between the H valve (31) and the I valve (32).
6. The system capable of accelerating the startup of the propylene rectification tower according to claim 4, wherein a C blind plate (33) is arranged on the H pipeline (20), a J valve (34) is arranged on the G pipeline (19), a K valve (35) and an L valve (36) are arranged on the H pipeline (20), the C blind plate (33) is arranged on a pipe section between the K valve (35) and the L valve (36), and one end of the G pipeline (19) is arranged on a pipe section between the J valve (34) and the propylene product pump (21).
7. The system capable of accelerating the startup of the propylene rectifying tower as claimed in claim 2, wherein the F pipe (15) is sequentially provided with an M valve (37), an N valve (38), a P valve (39), a Q valve (40) and an R valve (41), the M valve (37) is arranged at one end close to the reflux tank (3), a pipe section between the Q valve (40) and the R valve (41) is connected with a C cross-line pipe (42), and the C cross-line pipe (42) is provided with an S valve (43).
8. The method for accelerating the start-up of the propylene rectifying tower is characterized by comprising the following steps:
s1, before starting, confirming that three blind plates A (22), B (23) and C (33) are in an open state, removing a valve core of a J valve (34) on a G pipeline (19), and ensuring that all valves are in a closed state;
s2, liquid phase propylene reversely enters a propylene product line through a propylene pump minimum flow return line of a propylene tank area (6) to reach a pipeline boundary area of an olefin separation device, at the moment, a valve A (24), a valve G (30), a valve B (25), a valve C (26), a valve D (27), a valve E (28) and a valve F (29) on a pipeline B (18) are slowly opened, and the liquid phase propylene reaches an outlet pipeline of a protective bed (4) through a pipeline B (9);
s3, slowly opening an H valve (31) and an I valve (32) on the A overline pipeline (7), and enabling the liquid phase propylene to reach the front of the cooler (5) through the A overline pipeline (7);
s4, allowing the liquid phase propylene to reversely pass through the cooler (5), sequentially flowing through the G pipeline (19) and the H pipeline (20), slowly opening the K valve (35) and the L valve (36) of the pipeline, and allowing the liquid phase propylene to reach an inlet pipeline of a propylene product pump (21);
s5, slowly opening a valve M (37) and a valve N (38) of the pipeline, enabling the liquid-phase propylene to reach an inlet of a reflux pump (17) of the propylene rectifying tower and enter a reflux tank (3);
s6, when the liquid level of the reflux tank (3) is higher than 50%, starting the reflux pump (17) of the propylene rectifying tower, and slowly opening the valve (39) of the pipeline P, the valve (40) of the Q, the valve (43) of the S on the pipeline (42) of the C cross line and the valve (41) of the R to introduce the liquid phase propylene into the propylene rectifying tower (16).
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| CN202111639693.5A CN114210082A (en) | 2021-12-29 | 2021-12-29 | System and method capable of accelerating start of propylene rectifying tower |
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| CN202111639693.5A CN114210082A (en) | 2021-12-29 | 2021-12-29 | System and method capable of accelerating start of propylene rectifying tower |
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