CN114427615B - Water sealing device for torch system and operation method thereof - Google Patents
Water sealing device for torch system and operation method thereof Download PDFInfo
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- CN114427615B CN114427615B CN202010975691.2A CN202010975691A CN114427615B CN 114427615 B CN114427615 B CN 114427615B CN 202010975691 A CN202010975691 A CN 202010975691A CN 114427615 B CN114427615 B CN 114427615B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 238000007789 sealing Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 164
- 230000001105 regulatory effect Effects 0.000 claims abstract description 34
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims 6
- 239000007789 gas Substances 0.000 claims 2
- 230000007423 decrease Effects 0.000 claims 1
- 239000007792 gaseous phase Substances 0.000 claims 1
- 239000012071 phase Substances 0.000 claims 1
- 239000010865 sewage Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000001502 supplementing effect Effects 0.000 description 5
- 239000002360 explosive Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K13/00—Other constructional types of cut-off apparatus; Arrangements for cutting-off
- F16K13/08—Arrangements for cutting-off not used
- F16K13/10—Arrangements for cutting-off not used by means of liquid or granular medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/14—Conveying liquids or viscous products by pumping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Removal Of Floating Material (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention discloses a water sealing device for a torch system and an operation method thereof. The water sealing device is provided with a water sealing tank (1), an overflow liquid collecting tank (2), oil skimming and overflow pipes (8), an overflow liquid collecting pipe (9) and a U-shaped overflow pipe (3). The oil skimming and overflow pipe are vertically arranged, the top is provided with an oil skimming and overflow funnel (25), and the bottom is connected with an overflow liquid collecting pipe. An oil skimming baffle (12) is arranged in the overflow liquid collecting tank, the overflow liquid collecting tank is divided into an overflow liquid tank (14) and a condensed oil tank (13) by the oil skimming baffle, and an inlet of the U-shaped overflow pipe is communicated with the overflow liquid tank. The water seal device is also provided with a condensate oil pump (4), a condensate oil pump inlet pipeline (18), a condensate oil pump output pipeline (20), a condensate oil pump return pipeline (19), a first regulating valve (27) and a second regulating valve (28). The invention discloses an operation method of the water sealing device. The invention is mainly used for a torch system of petrochemical enterprises.
Description
Technical Field
The invention relates to a water sealing device for a torch system in petrochemical enterprises and an operation method thereof.
Background
The flare system of petrochemical enterprises adopts a water seal tank liquid seal mode to prevent the flare system from tempering, so that the discharge pipe network of the flare system and equipment connected with the discharge pipe network are prevented from being damaged, and the production safety is ensured. After the flare exhaust gas passes through the sealing water of the water sealed tank, part of partial heavy components can be condensed from the flare exhaust gas to form condensed oil. The condensed oil has a specific gravity smaller than that of water and floats on the liquid surface of the sealed water in the water sealed tank. In order to avoid backfire combustion and explosion of the torch system, condensate oil needs to be skimmed in time, sealing water is guaranteed to overflow, and the water seal height required by production is maintained.
At present, a water sealed tank is commonly used, and a horizontal transverse pipe is arranged at the required water sealed height and is used for skimming oil and overflowing sealing water. The horizontal cross pipe outlet is connected with the overflow liquid collecting pipe inlet, the overflow liquid collecting pipe outlet is connected with the U-shaped overflow pipe inlet, and the U-shaped overflow pipe outlet is inserted into the overflow liquid collecting tank. The top of the U-shaped overflow pipe is provided with a vacuum breaking pipe, and a gas phase communicating pipe is arranged between the water sealed tank and the overflow liquid collecting tank. The overflow liquid (comprising condensed oil and sealing water) is discharged into an overflow liquid collecting tank; when the liquid level of the overflow liquid in the overflow liquid collecting tank reaches a set high liquid level, manually starting a pump to transfer out the overflow liquid; when the overflow liquid level is reduced to a set low level, the pump is stopped manually. The main disadvantages of the water seal device are as follows: 1. and oil skimming and overflow are carried out by adopting a horizontal transverse pipe, so that overflow liquid flows unsmoothly and is easy to air lock. 2. The U-shaped overflow pipe is unreasonable in setting position. Because the outlet of the U-shaped overflow pipe is often positioned in the gas phase when the liquid level of the overflow liquid in the overflow liquid collecting tank drops, when the gas phase space in the water sealed tank and the overflow liquid collecting tank is positive pressure (the positive pressure is larger than the atmospheric pressure outside the tank), the flare exhaust gas in the water sealed tank can enter the overflow liquid collecting tank through the gas phase communicating pipe, and enters the U-shaped overflow pipe from the outlet of the U-shaped overflow pipe, and overflows to the atmosphere from the vacuum breaking pipe opening, so that the on-site oil and gas smell is larger. When the gas phase space in the water sealed tank and the overflow liquid collecting tank is negative pressure (the negative pressure is lower than the atmospheric pressure outside the tank), air can flow into the gas phase space in the overflow liquid collecting tank from the opening of the vacuum breaking pipe through the vacuum breaking pipe and the U-shaped overflow pipe, and enters the water sealed tank through the gas phase communicating pipe to be mixed with the flare exhaust gas to form explosive gas. 3. The transfer of overflow liquid in the overflow liquid collecting tank is labor-consuming, labor-consuming and poor in instantaneity, and is not intrinsically safe. Because the overflow liquid transfer in the overflow liquid collecting tank is reminded by the high/low liquid level alarm, the start and stop of the overflow liquid pump are controlled by manual operation; because the discharge of the flare stack gas is not easily anticipated, such unscheduled intermittent operation is inconvenient and prone to careless mistakes. The overflow liquid pump is operated by adopting measures such as manual pump filling, and the automatic control is difficult to realize when the overflow liquid pump is started and stopped. 4. The cleaning and diverting are not considered in the overflow liquid collecting process, so that the treatment cost of the oily sewage is increased.
Disclosure of Invention
The invention aims to provide a water sealing device for a torch system and an operation method thereof, which are used for solving the problems that when oil skimming and overflow are carried out by the existing water sealing device, overflow liquid is easy to air resistance, on-site oil gas smell is large, air is easy to blow in a water sealing tank, overflow liquid transportation is laborious, safety is poor, overflow liquid is not cleaned and split and the like.
In order to solve the problems, the invention adopts the following technical scheme: a water seal arrangement for torch system is equipped with water seal jar, overflow liquid collection tank, skimming and overflow pipe, overflow liquid catchment, U type overflow pipe, its characterized in that: the top is located the water seal tank, be equipped with skimming and overflow funnel, the bottom links to each other with overflow liquid catchment, be equipped with the skimming baffle in the overflow liquid catchment, the skimming baffle separates the overflow liquid catchment into overflow liquid tank and congeal the oil tank, the export of overflow liquid catchment is located the top of overflow liquid tank, the entry and the overflow liquid tank intercommunication of U type overflow pipe, the top of U type overflow pipe is equipped with broken vacuum tube, the outside of overflow liquid catchment is equipped with the condensate pump, be equipped with the condensate pump inlet pipe between condensate pump's entry and the condensate pump tank, the export of condensate pump links to each other with the entry of condensate pump output pipe, be equipped with condensate pump return line between condensate pump tank and the condensate pump output pipe.
The operation method of the device is characterized in that: the overflow liquid comprising condensate oil and sealing water in the water sealed tank enters an oil skimming funnel, flows into an overflow liquid collecting pipe through the oil skimming funnel and the overflow pipe, flows into an overflow liquid tank from the overflow liquid collecting pipe, overflows from the top of an oil skimming baffle plate on the liquid level of the overflow liquid in the overflow liquid tank to enter the condensate tank, the sealing water at the lower part of the overflow liquid tank enters an inlet of a U-shaped overflow pipe, flows out from an outlet of the U-shaped overflow pipe, the condensate oil pump is continuously started to continuously extract the condensate oil in the condensate tank, when the condensate oil level in the condensate oil tank is raised to reach a set high liquid level, the opening of a second regulating valve on an output pipeline of the large condensate oil pump is opened, and meanwhile, the opening of a first regulating valve on a return pipeline of the condensate oil pump is closed, and when the condensate oil level in the condensate oil tank is lowered to reach a set low liquid level, the opening of the second regulating valve on the output pipeline of the condensate oil pump is closed, and the opening of the first regulating valve on the return pipeline of the large condensate oil pump is opened.
The invention has the following beneficial effects: 1. oil skimming and overflow are carried out through the oil skimming and overflow funnel and the oil skimming and overflow pipe, so that smooth overflow liquid gravity flow is formed, the resistance is small, and no air resistance exists. 2. The inlet of the U-shaped overflow pipe is usually positioned at the lower part of the overflow liquid tank, the inlet of the U-shaped overflow pipe is usually positioned at the lower part of sealing water in the overflow liquid tank during the operation of the device, and a water seal with reliable height can be formed between the top of the U-shaped overflow pipe and the inlet of the U-shaped overflow pipe. When the gas phase space in the water sealed tank and the overflow liquid collecting tank is positive pressure, the flare exhaust gas in the water sealed tank enters the overflow liquid collecting tank through the gas phase communicating pipe, and then does not enter the U-shaped overflow pipe from the inlet of the U-shaped overflow pipe, and overflows to the atmosphere from the vacuum tube breaking opening, so that the phenomenon of large oil and gas smell in the production site is fundamentally avoided. When the gas phase space in the water sealed tank and the overflow liquid collecting tank is negative pressure, air cannot enter the gas phase space in the overflow liquid collecting tank from the vacuum tube breaking opening through the vacuum tube breaking and the U-shaped overflow pipe, and enters the water sealed tank through the gas phase communicating pipe to be mixed with the flare exhaust gas to form explosive gas. 3. According to the high liquid level height and the low liquid level height of the condensed oil liquid level in the condensed oil tank, the opening degrees of the first regulating valve and the second regulating valve are controlled by the liquid level controller in an interlocking mode, and the condensed oil pump can continuously run without controlling the start and stop of the condensed oil pump. The opening degree adjustment of the first regulating valve and the second regulating valve is easy to realize automatic control, unlike the control of starting and stopping of the condensate oil pump. By adopting the invention, the condensed oil in the overflow liquid collecting tank is transported in a labor-saving and labor-saving way, the condensed oil can be transported in time, the occurrence of careless mistakes is prevented, and the intrinsic safety is realized. 4. An oil skimming baffle is arranged in the overflow liquid collecting tank, and the overflow liquid collecting tank is divided into an overflow liquid tank and a condensation oil tank by the oil skimming baffle. Condensed oil in the overflow liquid cabin overflows into the condensed oil cabin through the top of the oil skimming baffle, and sealing water is reserved in the overflow liquid cabin, so that the sewage disposal and diversion of overflow liquid can be realized, and the treatment cost of oily sewage is reduced.
The invention is mainly used for a torch system of petrochemical enterprises.
The invention will be described in further detail with reference to the drawings and the detailed description. The drawings and detailed description are not intended to limit the scope of the invention as claimed.
Drawings
FIG. 1 is a schematic view of a water seal arrangement for a flare system of the present invention.
Reference numerals in fig. 1 denote: 1-water sealed tank; 2-an overflow liquid collecting tank; 3-U-shaped overflow pipe; 4-a condensation oil pump; 5-flare exhaust gas inlet conduit; 6, a flare exhaust outlet pipeline; 7-a water supplementing pipeline; 8, skimming oil and overflow pipe; 9, overflow liquid collecting pipe; 10-a gas phase communicating tube; 11-sealing the water level; 12-skimming baffle; 13-a condensed oil tank; 14-overflow tank; 15-breaking a vacuum tube; 16-condensed oil level; 17—overflow level; 18-condensing oil pump inlet pipe; 19-a condensate oil pump return pipeline; 20-a condensed oil pump output pipeline; 21-a drain pipe of a water sealed tank; 22-a condensate tank drain pipe; 23-overflow tank drain pipe; 24-a sewage funnel; 25-skimming and overflow funnels; 26-a shut-off valve; 27-a first regulating valve; 28-a second regulating valve.
Detailed Description
Referring to fig. 1, a water sealing device for a flare system of the present invention is provided with a water sealing tank 1, an overflow liquid collecting tank 2, an oil skimming and overflow pipe 8, an overflow liquid collecting pipe 9, and a U-shaped overflow pipe 3. The water sealed tank 1 and the overflow liquid collecting tank 2 are generally horizontal tanks (as shown in fig. 1), and may be vertical tanks (not shown). The water sealed tank 1 is provided with a torch exhaust gas inlet pipeline 5 and a torch exhaust gas outlet pipeline 6, the inlet of the torch exhaust gas inlet pipeline 5 is connected with a process device, and the outlet of the torch exhaust gas outlet pipeline 6 is connected with a torch. The overflow liquid collecting tank 2 is arranged below the water sealed tank 1, a gas phase communicating pipe 10 is arranged between the water sealed tank 1 and the overflow liquid collecting tank 2, and the gas phase communicating pipe 10 communicates the gas phase spaces in the water sealed tank 1 and the overflow liquid collecting tank 2, so that the pressure of the gas phase spaces in the two tanks is equal. The oil skimming and overflow pipe 8 is vertically arranged, the top is positioned in the water sealed tank 1 and is provided with an oil skimming and overflow funnel 25, and the bottom of the oil skimming and overflow pipe 8 is connected with the overflow liquid collecting pipe 9. The top inlet of the skimming and overflow funnel 25 is kept horizontal. The overflow liquid collecting pipe 9 is positioned below the water sealed tank 1, and the bottom outlet of the overflow liquid collecting pipe is positioned in the overflow liquid collecting tank 2.
An oil skimming baffle 12 is arranged in the overflow liquid collecting tank 2, and the oil skimming baffle 12 divides the overflow liquid collecting tank 2 into an overflow liquid tank 14 and a condensed oil tank 13. The overflow tank 14 is formed by the side of the skimming baffle 12 near the outlet of the overflow header 9 and the inner wall of the overflow collection tank 2 adjacent to the side below the height of the top of the skimming baffle 12, and the condensate tank 13 is formed by the other side of the skimming baffle 12 and the inner wall of the overflow collection tank 2 adjacent to the side below the height of the top of the skimming baffle 12. The oil skimming baffle 12 is a cambered plate and is perpendicular to the axial lead of the overflow liquid collecting tank 2. The straight edge of the oil skimming baffle 12 is positioned at the top and horizontally arranged, and the circular arc edge is connected with the inner wall of the overflow liquid collecting tank 2.
The outlet of the overflow liquid collecting pipe 9 is positioned above the overflow liquid tank 14 and in the gas phase space in the overflow liquid collecting tank 2; the outlet of overflow header 9 is typically located 50-200 mm above overflow level 17 in overflow tank 14. The inlet of the U-shaped overflow pipe 3 communicates with the overflow tank 14, typically in the lower part of the overflow tank 14. The outlet of the U-shaped overflow pipe 3 is a water outlet, and a sewage funnel 24 is arranged below the outlet. The top of the U-shaped overflow pipe 3 is provided with a vacuum breaking pipe 15.
A condensate pump 4 is arranged outside (below) the overflow liquid collecting tank 2, a condensate pump feeding pipeline 18 is arranged between an inlet of the condensate pump 4 and the condensate tank 13, and a cut-off valve 26 and a filter (the filter is not shown) are arranged on the condensate pump feeding pipeline 18. The outlet of the condensate pump 4 is connected with the inlet of the condensate pump output pipeline 20, and the outlet of the condensate pump output pipeline 20 is connected with the condensate collecting device. A condensate pump return pipe 19 is arranged between the condensate tank 13 and the condensate pump output pipe 20.
In order to ensure smooth flow of overflow liquid in the vertically arranged skimming and overflow pipe 8, the overflow liquid collection tank 2 should be lower than the water sealed tank 1 by a sufficient height. The tank top of the overflow liquid collecting tank 2 is generally 200-2000 mm lower than the tank bottom of the water sealed tank 1.
The middle lower part of the water sealed tank 1 is provided with sealing water. The end part of the water sealed tank 1 is provided with a water supplementing pipeline 7, and the production water is injected into the water sealed tank 1 through the water supplementing pipeline 7 to supplement the sealing water. The skimming and overflow pipe 8 and the skimming and overflow funnel 25 can control the height of the sealed water level 11 in the water sealed tank 1, and the skimming and overflow pipe 8 can be provided with 1,2 or 3. When 2 or 3 oil skimming and overflow funnels are arranged, the tops of the oil skimming and overflow funnels 25 on each oil skimming and overflow pipe 8 are positioned at different heights, so that the height of the sealed water liquid level 11 in the water sealed tank 1 is adjusted, and the production requirements are met. And each oil skimming and overflow pipe 8 is provided with a cut-off valve 26, and the cut-off valve 26 is arranged on a pipe section of the oil skimming and overflow pipe 8 below the water-sealed tank 1. When one oil skimming and overflow pipe 8 is used, the cut-off valve 26 on the oil skimming and overflow pipe 8 is opened, and the cut-off valves 26 on the other oil skimming and overflow pipes 8 are closed. In fig. 1, 3 skimming and overflow pipes 8 are provided, and one skimming and overflow pipe 8 provided with the highest top skimming and overflow funnel 25 is provided with a shut-off valve 26 which is opened, sealing the water level 11 in the highest position. The lowest height of the top of the skimming and overflow funnel 25, which is typically 200-400 mm higher than the outlet of the flare bleed gas inlet conduit 5, ensures that a sufficient seal height is formed at this outlet.
The condensate pump return pipe 19 is provided with a first regulating valve 27, the condensate pump output pipe 20 is provided with a second regulating valve 28, and the first regulating valve 27 and the second regulating valve 28 are interlocked with a liquid level controller (not shown) for monitoring the height of the condensate level 16 in the condensate tank 13. The second regulating valve 28 is located between the junction of the condensate pump return line 19 and the condensate pump output line 20 to the outlet of the condensate pump output line 20, as shown in fig. 1.
The gas phase space in the water sealed tank 1 is above the sealed water liquid level 11 in the water sealed tank 1, and the gas phase space in the overflow liquid collecting tank 2 is above the overflow liquid level 17 in the overflow liquid tank 14 and the condensed oil level 16 in the condensed oil tank 13.
The inlet of the U-shaped overflow pipe 3 is generally 10-200 mm higher than the bottom of the overflow tank 14, so as to prevent impurities such as rust at the bottom of the overflow tank 14 from entering the U-shaped overflow pipe 3 and causing blockage. The water seal height h of the U-shaped overflow pipe 3 is generally 1.75-3 times of the height of a water column corresponding to the maximum operating pressure of the gas phase space in the water seal tank 1 and is not less than 3m (meters); the pressures mentioned in this invention are gauge pressures. The bottom of the inner surface of the pipeline at the top of the U-shaped overflow pipe 3 is at the same height as the top of the oil skimming baffle 12.
The height of the skimming baffle 12 is generally 1/3-2/3 of the inner diameter of the overflow liquid collection tank 2, and the volume of the overflow liquid tank 14 is generally 1/2-2 times that of the condensate tank 13.
For maintenance, the bottom of the water sealed tank 1 is provided with a water sealed tank drain pipe 21, the bottom of the condensed oil tank 13 is provided with a condensed oil tank drain pipe 22, and the bottom of the overflow tank 14 is provided with an overflow tank drain pipe 23. The water replenishing pipe 7 and the drain pipes are provided with cut-off valves 26, the outlets of the drain pipes are positioned above the sewage funnel 24, and the discharged sewage flows into the sewage funnel 24.
The operation method of the water sealing device for the torch system is that the torch exhaust gas enters the sealing water in the water sealing tank 1 from the torch exhaust gas inlet pipeline 5, then breaks through the water seal at the outlet of the torch exhaust gas inlet pipeline 5, enters the gas phase space above the sealing water liquid level 11, and finally flows out of the torch exhaust gas outlet pipeline 6 and enters the torch. When the overflow liquid consisting of condensed oil and sealing water in the water sealed tank 1 reaches the height of the sealing water liquid level 11, the overflow liquid enters an oil skimming and overflow funnel 25, flows into an overflow liquid collecting pipe 9 through the oil skimming and overflow pipe 8, and flows into an overflow liquid tank 14 from the overflow liquid collecting pipe 9. Condensate (and also a small amount of sealing water) above the overflow surface 17 of the overflow liquid in the overflow tank 14 overflows through the top of the skimming baffle 12 into the condensate tank 13. The sealing water at the lower part of the overflow tank 14 enters the inlet of the U-shaped overflow pipe 3, flows out from the outlet of the U-shaped overflow pipe 3 and enters the sewage funnel 24.
The condensate pump 4 is continuously started to continuously pump out the condensate in the condensate tank 13. When the condensate level 16 in the condensate tank 13 rises to a set high level, the opening of the second regulating valve 28 on the condensate pump output pipeline 20 is increased, and the opening of the first regulating valve 27 on the condensate pump return pipeline 19 is reduced. When the condensed oil level 16 in the condensed oil tank 13 is lowered to reach a set low liquid level height, the opening of the second regulating valve 28 on the condensed oil pump output pipeline 20 is reduced, and the opening of the first regulating valve 27 on the condensed oil pump return pipeline 19 is increased. And the opening degree of the regulating valve is regulated by the automatic interlocking control of the liquid level controller.
The distance from the high liquid level to the bottom of the condensed oil tank 13 is generally 2/3 of the height of the oil skimming baffle 12, and the distance from the low liquid level to the bottom of the condensed oil tank 13 is generally 1/3 of the height of the oil skimming baffle 12. The flow rate of the condensate oil pumped by the condensate oil pump 4 is generally not less than 100% of the overflow liquid self-flow rate of the single oil skimming and overflow pipe 8, and the flow rate of the condensate oil pumped by the condensate oil pump 4 is preferably 120% -200% of the overflow liquid self-flow rate of the single oil skimming and overflow pipe 8. The water supplementing capacity of the water supplementing pipeline 7 is generally 20% -50% of the self-flowing flow rate of the overflow liquid of the single oil skimming pipe and the overflow pipe 8. The pipe diameter of the U-shaped overflow pipe 3 is determined according to the fact that the sealing water self-flow rate of the U-shaped overflow pipe 3 is 120% -200% of the overflow liquid self-flow rate of the single oil skimming pipe and the overflow pipe 8.
Claims (9)
1. A water seal arrangement for torch system is equipped with water seal tank (1), overflow liquid collection tank (2), skimming and overflow pipe (8), overflow liquid catchment pipe (9), U type overflow pipe (3), is equipped with trip valve (26) on skimming and the overflow pipe (8), skimming and overflow pipe (8) set up 1,2 or 3, and the top of U type overflow pipe (3) is equipped with broken vacuum tube (15), is equipped with gaseous phase communicating pipe (10), its characterized in that between water seal tank (1) and overflow liquid collection tank (2): the top is positioned in the water seal tank (1) and is provided with an oil skimming funnel (25), the bottom is connected with the overflow liquid collecting pipe (9), the top inlets of the oil skimming funnel (25) are kept horizontal, when 2 or 3 oil skimming and overflow pipes (8) are arranged, the tops of the oil skimming funnel (25) and the overflow funnel (8) on each oil skimming and overflow pipe (8) are positioned at different heights, an oil skimming baffle (12) is arranged in the overflow liquid collecting tank (2), the oil skimming baffle (12) separates the overflow liquid collecting tank (2) into an overflow liquid tank (14) and a condensation liquid tank (13), the outlet of the overflow liquid collecting pipe (9) is positioned above the overflow liquid tank (14), the inlet of the U-shaped overflow pipe (3) is positioned at the lower part of the overflow liquid tank (14) and is communicated with the overflow liquid tank (14), the bottom of the inner surface of a pipeline at the top of the U-shaped overflow pipe (3) is positioned at the same height as the top of the oil skimming baffle (12), a condensate pump (4) is arranged outside the overflow liquid collecting tank (2), a condensate pump (20) is arranged between the condensate pump (4) and the condensate pump (13) and the condensate pump (20) is arranged between the condensate pump (13) and the condensate pump (20), the condensate pump reflux pipeline (19) is provided with a first regulating valve (27), the condensate pump output pipeline (20) is provided with a second regulating valve (28), the first regulating valve (27) and the second regulating valve (28) are interlocked with a liquid level controller for monitoring the height of the condensate liquid level (16) in the condensate pump reflux pipeline (13), the second regulating valve (28) is positioned between the junction of the condensate pump reflux pipeline (19) and the condensate pump output pipeline (20) to the outlet of the condensate pump output pipeline (20), when the water seal device for a torch system is operated, the condensate pump (4) is continuously opened, when the condensate liquid level (16) in the condensate pump (13) is raised to reach the set high liquid level height, the opening of the second regulating valve (28) on the condensate pump output pipeline (20) is opened, the opening of the first regulating valve (27) on the condensate pump reflux pipeline (19) is simultaneously reduced, and when the condensate liquid level (16) in the condensate pump reflux pipeline (13) is lowered to reach the set low liquid level height, the opening of the second regulating valve (27) is opened simultaneously.
2. The apparatus according to claim 1, wherein: the tank top of the overflow liquid collecting tank (2) is 200-2000 mm lower than the tank bottom of the water sealed tank (1).
3. The apparatus according to claim 1, wherein: the lowest height of the top of the oil skimming and overflow funnel (25) is 200-400 mm higher than the outlet of the flare exhaust gas inlet pipeline (5).
4. The apparatus according to claim 1, wherein: the inlet of the U-shaped overflow pipe (3) is 10-200 mm higher than the bottom of the overflow liquid tank (14), the water seal height h of the U-shaped overflow pipe (3) is 1.75-3 times of the water column height corresponding to the maximum operating pressure of the gas phase space in the water seal tank (1), and the pressure is gauge pressure.
5. The apparatus according to claim 1, wherein: the height of the oil skimming baffle (12) is 1/3-2/3 of the inner diameter of the overflow liquid collecting tank (2), and the volume of the overflow liquid tank (14) is 1/2-2 times of the volume of the condensed oil tank (13).
6. A method of operating the device of claim 1, wherein: the overflow liquid consisting of condensed oil and sealing water in the water sealed tank (1) enters an oil skimming and overflow funnel (25), flows into an overflow liquid collecting pipe (9) through the oil skimming and overflow pipe (8), flows into an overflow liquid tank (14) from the overflow liquid collecting pipe (9), condensed oil on the overflow liquid level (17) in the overflow liquid tank (14) overflows into a condensed oil tank (13) through the top of an oil skimming baffle (12), sealing water at the lower part of the overflow liquid tank (14) enters an inlet of a U-shaped overflow pipe (3), flows out from an outlet of the U-shaped overflow pipe (3), the condensed oil in the condensed oil tank (13) is continuously pumped out by a condensed oil pump (4), when the condensed oil level (16) in the condensed oil tank (13) rises and reaches a set high liquid level height, the opening of a second regulating valve (28) on a large condensed oil pump output pipeline (20) is opened, and simultaneously the opening of the first regulating valve (27) on the condensed oil pump reflux pipeline (19) is closed, and when the condensed oil level (16) in the condensed oil tank (13) decreases and the set high liquid level (19) reaches the set high opening of the second regulating valve (27).
7. The method according to claim 6, wherein: the distance from the high liquid level to the bottom of the condensed oil tank (13) is 2/3 of the height of the oil skimming baffle (12), the distance from the low liquid level to the bottom of the condensed oil tank (13) is 1/3 of the height of the oil skimming baffle (12), and the flow rate of condensed oil pumped by the condensed oil pump (4) is not less than 100% of the overflow liquid self-flow rate of a single oil skimming and overflow pipe (8).
8. The method according to claim 7, wherein: the flow of the condensed oil pumped by the condensed oil pump (4) is 120-200% of the self-flow of overflow liquid of a single oil skimming pipe and an overflow pipe (8).
9. The method according to claim 6 or 7 or 8, characterized in that: the pipe diameter of the U-shaped overflow pipe (3) is determined according to the fact that the sealing water self-flow rate of the U-shaped overflow pipe (3) is 120% -200% of the overflow liquid self-flow rate of the single oil skimming pipe and the overflow pipe (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010975691.2A CN114427615B (en) | 2020-09-16 | 2020-09-16 | Water sealing device for torch system and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010975691.2A CN114427615B (en) | 2020-09-16 | 2020-09-16 | Water sealing device for torch system and operation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114427615A CN114427615A (en) | 2022-05-03 |
| CN114427615B true CN114427615B (en) | 2024-05-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010975691.2A Active CN114427615B (en) | 2020-09-16 | 2020-09-16 | Water sealing device for torch system and operation method thereof |
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