CN114427615A - Water seal device for torch system and operation method thereof - Google Patents
Water seal device for torch system and operation method thereof Download PDFInfo
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- CN114427615A CN114427615A CN202010975691.2A CN202010975691A CN114427615A CN 114427615 A CN114427615 A CN 114427615A CN 202010975691 A CN202010975691 A CN 202010975691A CN 114427615 A CN114427615 A CN 114427615A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 170
- 230000001105 regulatory effect Effects 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims description 26
- 230000005484 gravity Effects 0.000 claims description 9
- 239000007789 gas Substances 0.000 description 37
- 239000012071 phase Substances 0.000 description 15
- 239000010865 sewage Substances 0.000 description 12
- 239000007792 gaseous phase Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000007599 discharging Methods 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
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
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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
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- 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
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- 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)
- Jet Pumps And Other Pumps (AREA)
- Removal Of Floating Material (AREA)
Abstract
The invention discloses a water seal device for a torch system and an operation method thereof. The water seal device is provided with a water seal 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 oil skimming and overflow pipe is vertically arranged, the top part is provided with an oil skimming and overflow funnel (25), and the bottom part is connected with an overflow liquid header. An oil skimming baffle (12) is arranged in the overflow liquid collecting tank, the overflow liquid collecting tank is divided into an overflow liquid cabin (14) and a condensed oil cabin (13) by the oil skimming baffle, and an inlet of the U-shaped overflow pipe is communicated with the overflow liquid cabin. The water seal device is also provided with a condensed oil pump (4), a condensed oil pump inlet pipeline (18), a condensed oil pump output pipeline (20), a condensed 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 seal device. The invention is mainly used for the torch system of petrochemical enterprises.
Description
Technical Field
The invention relates to a water seal device for a torch system in a petrochemical enterprise and an operation method thereof.
Background
The flare system of petrochemical enterprise adopts the mode of water-sealed tank liquid seal to stop the flare system tempering mostly, avoids flare system discharge pipe network and the equipment of connecting to suffer destruction, ensures production safety. After the flare discharge gas passes through the sealing water of the water-sealed tank, part of partial heavy components can be condensed out from the flare discharge gas and form condensed oil. The condensed oil has a specific gravity smaller than that of water and floats on the surface of the sealing water in the water seal tank. In order to avoid backfire and explosion of a torch system, condensed 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 horizontal pipe is arranged on a water seal height for skimming oil and sealing water overflow in a common water seal tank. The horizontal 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 seal tank and the overflow liquid collecting tank. Discharging overflow liquid (including condensed oil and sealing water) 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, the pump is manually started to convey the overflow liquid out; when the liquid level of the overflow liquid is reduced to a set low liquid level, the pump is manually stopped. The main disadvantages of the water seal device are: 1. the horizontal transverse pipe is adopted for oil skimming and overflow, overflow liquid flows smoothly, and air resistance is easy to occur. 2. The U-shaped overflow pipe is unreasonable in arrangement position. Because the export of U type overflow pipe often is located among the gaseous phase when the overflow liquid level in the overflow liquid collection tank descends, when the vapor space in water seal tank and the overflow liquid collection tank was the malleation (malleation means is greater than the atmospheric pressure outside the jar), the torch exhaust gas in the water seal tank can get into the overflow liquid collection tank through gaseous phase communicating pipe to from U type overflow pipe export entering U type overflow pipe, spill over to the atmosphere from broken vacuum tube opening again, make on-the-spot oil gas smell great. When the gas phase space in the water seal 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, enters the water seal tank through the gas phase communicating pipe, and is mixed with torch exhaust gas to form explosive gas. 3. The transportation of the overflow liquid in the overflow liquid collecting tank takes labor and effort, has poor instantaneity and is not intrinsically safe. The overflow liquid in the overflow liquid collecting tank is conveyed and transferred by the high/low liquid level alarm, so that the start and stop of the overflow liquid pump are controlled by manual operation; such unscheduled intermittent operation is inconvenient and prone to leakage, as the discharge of flare effluent gas is not easily predictable. The operation of the overflow liquid pump needs measures such as manual pump filling and the like, and the start and stop of the overflow liquid pump are difficult to realize automatic control. 4. The sewage disposal and diversion are not considered in the process of collecting the overflow liquid, and the cost of treating the oily sewage is increased.
Disclosure of Invention
The invention aims to provide a water seal device for a torch system and an operation method thereof, and aims to solve the problems that overflow liquid is easy to air-block during oil skimming and overflow, the on-site oil gas smell is large, air is easy to enter a water seal tank, the overflow liquid is difficult to convey and poor in safety, the overflow liquid is not cleaned and shunted and the like in the conventional water seal device.
In order to solve the problems, the invention adopts the technical scheme that: the utility model provides a water seal arrangement for torch system is equipped with water seal tank, overflow liquid holding vessel, skimming oil and overflow pipe, overflow liquid header, U type overflow pipe, its characterized in that: oil skimming and the vertical setting of overflow pipe, the top is located the water seal tank, be equipped with oil skimming and overflow funnel, the bottom links to each other with the overflow liquid header, be equipped with the oil skimming baffle in the overflow liquid collection tank, the oil skimming baffle separates the overflow liquid collection tank for overflow liquid cabin and condensation tank, the export of overflow liquid header is located the top in overflow liquid cabin, the entry and the overflow liquid cabin intercommunication of U type overflow pipe, the top of U type overflow pipe is equipped with broken vacuum tube, the outside of overflow liquid collection tank is equipped with the condensate pump, be equipped with condensate pump inlet pipe way between the entry of condensate pump and the condensation tank, the export of condensate pump links to each other with the entry of condensate pump output pipeline, be equipped with condensate pump backflow pipeline between condensate tank and the condensate pump output pipeline.
The operation method of the device is characterized in that: the water seal tank is internally provided with an overflow liquid composed of condensed oil and sealing water, the condensed oil enters an oil skimming funnel and an overflow funnel, the condensed oil flows into an overflow liquid header pipe through an oil skimming pipe and an overflow liquid header pipe, the condensed oil on the liquid level of the overflow liquid in the overflow liquid bin overflows from the top of an oil skimming baffle plate and enters a condensed oil bin, the sealing water at the lower part of the overflow liquid bin enters an inlet of a U-shaped overflow pipe and flows out from an outlet of the U-shaped overflow pipe, a condensed oil pump is continuously opened to continuously pump out the condensed oil in the condensed oil bin, when the liquid level of the condensed oil in the condensed oil bin rises and reaches a set high liquid level, the opening degree of a second regulating valve on an output pipeline of the condensed oil pump is opened, meanwhile, the opening degree of a first regulating valve on a return pipeline of the condensed oil pump is closed, when the liquid level of the condensed oil in the condensed oil bin falls and reaches a set low liquid level, the opening degree of the second regulating valve on the output pipeline of the condensed oil pump is closed, and simultaneously opening the opening degree of a first regulating valve on a reflux pipeline of the condensing oil pump.
The invention has the following beneficial effects: 1. the oil skimming and overflow are carried out through the oil skimming and overflow funnel and the oil skimming and overflow pipe, so that smooth gravity flow of overflow liquid is formed, the resistance is small, and no air resistance exists. 2. The inlet of the U-shaped overflow pipe is usually located in the lower part of the overflow tank, and during operation of the device the inlet of the U-shaped overflow pipe is usually located in the lower part of the overflow tank where the water is sealed, and a water seal of a 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 seal tank and the overflow liquid collecting tank is positive pressure, flare exhaust gas in the water seal tank enters the overflow liquid collecting tank through the gas phase communicating pipe, does not enter the U-shaped overflow pipe from the inlet of the U-shaped overflow pipe, and overflows to the atmosphere from the opening of the vacuum breaking pipe, so that the phenomenon of great oil gas smell in a production field is fundamentally avoided. When the gas phase space in the water seal tank and the overflow liquid collecting tank is negative pressure, air can not 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 seal tank through the gas phase communicating pipe to be mixed with the flare discharge gas to form explosive gas. 3. According to the high liquid level height and the low liquid level height of the liquid level of the condensed oil in the condensed oil cabin, 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 run continuously without controlling the start and stop of the condensed oil pump. Different from the start and stop of the control condensate pump, the opening adjustment of the first adjusting valve and the second adjusting valve is easy to realize automatic control. By adopting the invention, the condensed oil in the overflow liquid collecting tank is labor-saving and labor-saving in conveying, the condensed oil can be conveyed immediately, careless leakage is prevented, and the intrinsic safety is realized. 4. An oil skimming baffle is arranged in the overflow liquid collecting tank and divides the overflow liquid collecting tank into an overflow liquid cabin and a condensed oil cabin. The condensed oil in the overflow liquid cabin overflows from the top of the oil skimming baffle and enters the condensed oil cabin, and the sealing water is left in the overflow liquid cabin, so that the sewage cleaning and shunting of the overflow liquid can be realized, and the treatment cost of oily sewage is reduced.
The invention is mainly used for the torch system of petrochemical enterprises.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The drawings and detailed description do not limit the scope of the invention as claimed.
Drawings
FIG. 1 is a schematic view of a water seal assembly for a flare system of the present invention.
The reference numerals in fig. 1 denote: 1-water sealing the tank; 2-overflow liquid collecting tank; 3-U-shaped overflow pipe; 4-a condensate oil pump; 5-flare exhaust gas inlet pipeline; 6-outlet pipeline of torch exhaust gas; 7-water supply pipeline; 8-oil skimming and overflow; 9-overflow liquid collecting pipe; 10-gas phase communicating pipe; 11-sealing the water level; 12-oil skimming baffle; 13-condensation oil tank; 14-overflow tank; 15-breaking the vacuum tube; 16-condensed oil level; 17-overflow liquid level; 18-a pump inlet pipeline of a condensate pump; 19-a condensate pump return line; 20-a condensing oil pump output pipeline; 21-water seal tank blow-off pipe; 22-a condensed oil tank blow-off pipe; 23-overflow liquid tank drain pipe; 24-a sewage funnel; 25-oil skimming and overflow funnel; 26-a shut-off valve; 27 — a first regulating valve; 28-second regulating valve.
Detailed Description
Referring to fig. 1, the water sealing device for the torch system 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 collecting tank 2 are generally horizontal tanks (as shown in fig. 1) or vertical tanks (not shown). The water-sealed tank 1 is provided with a torch discharge gas inlet pipeline 5 and a torch discharge gas outlet pipeline 6, the inlet of the torch discharge gas inlet pipeline 5 is connected with a process device, and the outlet of the torch discharge gas outlet pipeline 6 is connected with a torch. Overflow liquid collecting tank 2 is located water seal tank 1 below, is equipped with gaseous phase communicating pipe 10 between water seal tank 1 and the overflow liquid collecting tank 2, and gaseous phase communicating pipe 10 communicates the gaseous phase space in water seal tank 1 and the overflow liquid collecting tank 2, makes the pressure of gaseous phase space in these two jars equal. The oil skimming and overflow pipe 8 is vertically arranged, the top part of the oil skimming and overflow pipe 8 is positioned in the water seal tank 1 and is provided with an oil skimming and overflow funnel 25, and the bottom part of the oil skimming and overflow pipe 8 is connected with an overflow liquid collecting pipe 9. The top inlet of the oil skimming and overflow funnel 25 is kept horizontal. The overflow liquid collecting pipe 9 is positioned below the water seal 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 overflow liquid collecting tank 2 is divided into an overflow liquid tank 14 and a condensed oil tank 13 by the oil skimming baffle 12. The overflow tank 14 is composed of the side surface of the oil skimming baffle 12 close to the outlet of the overflow liquid collecting pipe 9 and the inner wall of the overflow liquid collecting tank 2 close to the side surface and positioned below the top height of the oil skimming baffle 12, and the condensed oil tank 13 is composed of the other side surface of the oil skimming baffle 12 and the inner wall of the overflow liquid collecting tank 2 close to the side surface and positioned below the top height of the oil skimming baffle 12. The oil skimming baffle 12 is an arched plate and is vertical 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 in the gas phase space above the overflow liquid cabin 14 and in the overflow liquid collecting tank 2; the outlet of the overflow liquid collecting pipe 9 is generally 50-200 mm (millimeter) above the level 17 of the overflow liquid in the overflow liquid chamber 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 U-shaped overflow pipe. 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 inlet pipeline 18 is arranged between an inlet of the condensate pump 4 and the condensate oil tank 13, and a stop valve 26 and a filter (not shown) are arranged on the condensate pump inlet pipeline 18. The outlet of the condensed oil pump 4 is connected with the inlet of the condensed oil pump output pipeline 20, and the outlet of the condensed oil pump output pipeline 20 is connected with the condensed oil collecting device. A condensed oil pump return pipeline 19 is arranged between the condensed oil tank 13 and the condensed oil pump output pipeline 20.
In order to ensure that the overflow liquid flows smoothly in the vertically arranged oil skimming and overflow pipe 8, the overflow liquid collecting tank 2 should be lower than the water seal tank 1 by a sufficient height. The top of the overflow liquid collecting tank 2 is generally 200-2000 mm lower than the bottom of the water seal tank 1.
The middle lower part of the water-sealed tank 1 is filled with sealing water. The end part of the water-sealed tank 1 is provided with a water replenishing pipeline 7, and the production water is injected into the water-sealed tank 1 through the water replenishing pipeline 7 to be used as the supplement of the sealing water. The oil skimming and overflow pipe 8 and the oil skimming and overflow funnel 25 can control the height of the sealing water level 11 in the water sealed tank 1, and 1, 2 or 3 oil skimming and overflow pipes 8 can be arranged. When 2 or 3 oil skimming and overflow pipes 8 are arranged, the top of the oil skimming and overflow funnel 25 on each oil skimming and overflow pipe 8 is positioned at different heights, so that the height of the sealing water liquid level 11 in the water seal tank 1 is adjusted, and the production requirement is met. Each oil skimming and overflow pipe 8 is provided with a cut-off valve 26, and the cut-off valve 26 is arranged on the pipe section of the oil skimming and overflow pipe 8 below the water seal tank 1. When one oil skimming and overflow pipe 8 is used, the shut-off valve 26 on the oil skimming and overflow pipe 8 is opened, and the shut-off valves 26 on the other oil skimming and overflow pipes 8 are closed. In fig. 1, 3 oil skimming and overflow pipes 8 are provided, and a dump valve 26 on one oil skimming and overflow pipe 8 provided with the highest oil skimming and overflow funnel 25 at the top is opened, and the sealing water level 11 is at the highest position. The minimum height of the top of the oil skimming and overflow funnel 25, which is typically 200-400 mm above the outlet of the flare stack gas inlet pipe 5, ensures that a sufficient water seal height is formed at the outlet.
The first regulating valve 27 is arranged on the condensed oil pump return pipeline 19, the second regulating valve 28 is arranged on the condensed oil pump output pipeline 20, 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 liquid level 16 of the condensed oil in the condensed oil 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 upper part of the sealed water liquid level 11 in the water seal tank 1 is a gas phase space in the water seal tank 1, and the upper parts of the overflow liquid level 17 in the overflow liquid tank 14 and the condensed oil level 16 in the condensed oil tank 13 are gas phase spaces in the overflow liquid collecting tank 2.
The inlet of the U-shaped overflow pipe 3 is generally 10-200 mm higher than the bottom of the overflow liquid tank 14, so as to prevent impurities such as rust at the bottom of the overflow liquid 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 operation pressure of a gas phase space in the water seal tank 1 and is not less than 3m (meters); the pressures mentioned in the present 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 oil skimming baffle 12 is generally 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 generally 1/2-2 times of the volume of the condensed oil tank 13.
For the needs of maintenance, the bottom of the water seal tank 1 is provided with a drain pipe 21 of the water seal tank, the bottom of the condensed oil tank 13 is provided with a drain pipe 22 of the condensed oil tank, and the bottom of the overflow liquid tank 14 is provided with a drain pipe 23 of the overflow liquid tank. The water supply pipeline 7 and each sewage discharge pipe are provided with a cut-off valve 26, the outlet of each sewage discharge pipe is positioned above the sewage funnel 24, and the discharged sewage flows into the sewage funnel 24.
The operation method of the water seal device for the torch system is that the torch discharge gas enters the sealing water in the water seal tank 1 from the torch discharge gas inlet pipeline 5, breaks through the water seal at the outlet of the torch discharge gas inlet pipeline 5 and enters the gas phase space above the liquid level 11 of the sealing water, and finally flows out from the torch discharge gas outlet pipeline 6 and enters the torch. When the overflow liquid composed 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 header 9 through an oil skimming and overflow pipe 8, and then flows into an overflow liquid tank 14 from the overflow liquid header 9. The condensed oil (and a small amount of seal water) on the surface 17 of the overflow liquid in the overflow liquid tank 14 overflows into the condensed oil tank 13 through the top of the oil skimming baffle 12. The sealing water at the lower part of the overflow liquid tank 14 enters the inlet of the U-shaped overflow pipe 3, flows out of the outlet of the U-shaped overflow pipe 3 and enters the sewage funnel 24.
The condensed oil pump 4 is continuously started to continuously pump out the condensed oil in the condensed oil tank 13. When the level 16 of the condensed oil in the condensed oil tank 13 rises to reach a set high level, the opening degree of the second regulating valve 28 on the condensed oil pump output pipeline 20 is opened, and the opening degree of the first regulating valve 27 on the condensed oil pump return pipeline 19 is closed. When the level 16 of the condensed oil in the condensed oil tank 13 is lowered to reach a set low level, the opening degree of the second regulating valve 28 on the condensed oil pump output pipeline 20 is reduced, and the opening degree of the first regulating valve 27 on the condensed oil pump return pipeline 19 is increased. The adjustment of the opening of the adjusting valve is controlled by the liquid level controller in an automatic interlocking way.
The distance from the high liquid level height 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 height 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 condensed oil pumped out by the condensed oil pump 4 is generally not less than 100% of the overflow liquid gravity flow rate of the single oil skimming and overflow pipe 8, and the flow rate of the condensed oil pumped out by the condensed oil pump 4 is preferably 120% -200% of the overflow liquid gravity flow rate of the single oil skimming and overflow pipe 8. The water replenishing capacity of the water replenishing pipeline 7 is generally 20-50% of the overflow liquid gravity flow of the single oil skimming and overflow pipe 8. The pipe diameter of the U-shaped overflow pipe 3 is determined according to that the sealing water gravity flow of the U-shaped overflow pipe 3 is 120-200% of the overflow liquid gravity flow of the single oil skimming and overflow pipe 8.
Claims (10)
1. The utility model provides a water seal arrangement for torch system is equipped with water seal tank (1), overflow liquid holding vessel (2), skimming and overflow pipe (8), overflow liquid header (9), U type overflow pipe (3), its characterized in that: the oil skimming and overflow pipe (8) is vertically arranged, the top is positioned in the water seal tank (1), an oil skimming funnel (25) and an overflow funnel are arranged, the bottom is connected with an overflow liquid collecting pipe (9), an oil skimming baffle (12) is arranged in the overflow liquid collecting tank (2), the overflow liquid collecting tank (2) is separated into an overflow liquid cabin (14) and a condensed oil cabin (13) by the oil skimming baffle (12), the outlet of the overflow liquid collecting pipe (9) is positioned above the overflow liquid cabin (14), the inlet of the U-shaped overflow pipe (3) is communicated with the overflow liquid cabin (14), the top of the U-shaped overflow pipe (3) is provided with a vacuum breaking pipe (15), the outside of the overflow liquid collecting tank (2) is provided with a condensed oil pump (4), a condensed oil pump inlet pipeline (18) is arranged between the inlet of the condensed oil pump (4) and the condensed oil cabin (13), the outlet of the condensed oil pump (4) is connected with the inlet of the condensed oil pump output pipeline (20), a condensed oil pump return pipeline (19) is arranged between the condensed oil tank (13) and the condensed oil pump output pipeline (20).
2. The apparatus of claim 1, wherein: the top of the overflow liquid collecting tank (2) is 200-2000 mm lower than the bottom of the water seal tank (1).
3. The apparatus of claim 1, wherein: oil skimming and overflow pipe (8) set up 1, 2 or 3, when setting up 2 or 3, the top of oil skimming and overflow funnel (25) on every oil skimming and overflow pipe (8) is located different height, is equipped with trip valve (26) on oil skimming and overflow pipe (8), and the minimum height at oil skimming and overflow funnel (25) top is higher than the export 200 ~ 400mm of torch exhaust gas inlet pipe (5).
4. The apparatus of claim 1 or 3, wherein: be equipped with first governing valve (27) on condensed oil pump return line (19), be equipped with second governing valve (28) on condensed oil pump output pipeline (20), first governing valve (27) and second governing valve (28) all with the liquid level controller interlock of control condensed oil liquid level (16) height in condensed oil cabin (13), second governing valve (28) are located between the junction of condensed oil pump return line (19) and condensed oil pump output pipeline (20) to the export of condensed oil pump output pipeline (20).
5. The apparatus of claim 1 or 4, 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 height of a water column corresponding to the maximum operating pressure (gauge pressure) of a gas phase space in the water seal tank (1), and 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).
6. The apparatus of any one of claims 1 to 5, 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 that of the condensed oil tank (13).
7. A method of operating the device of claim 1, wherein: the method comprises the steps that overflow liquid consisting of condensed oil and sealing water in a water seal tank (1) enters an oil skimming and overflow funnel (25), the overflow liquid flows into an overflow liquid collecting pipe (9) through an oil skimming and overflow pipe (8), then flows into an overflow liquid cabin (14) from the overflow liquid collecting pipe (9), the condensed oil on an overflow liquid level (17) in the overflow liquid cabin (14) overflows into a condensed oil cabin (13) through the top of an oil skimming baffle (12), sealing water at the lower part of the overflow liquid cabin (14) enters an inlet of a U-shaped overflow pipe (3), flows out from an outlet of the U-shaped overflow pipe (3), a condensed oil pump (4) is continuously opened, the condensed oil in the condensed oil cabin (13) is continuously extracted, when the condensed oil level (16) in the condensed oil cabin (13) rises to reach a set high liquid level height, the opening degree of a second adjusting valve (28) on an output pipeline (20) of a large condensed oil pump is opened, and the opening degree of a first adjusting valve (27) on a condensed oil pump return pipeline (19) is simultaneously closed, when the level (16) of the condensed oil in the condensed oil tank (13) is lowered and reaches a set low liquid level height, the opening degree of a second regulating valve (28) on an output pipeline (20) of the condensed oil pump is closed, and the opening degree of a first regulating valve (27) on a return pipeline (19) of the condensed oil pump is opened.
8. The method of claim 7, wherein: the distance from the high liquid level height 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 height to the bottom of the condensed oil tank (13) is 1/3 of the height of the oil skimming baffle (12), and the flow of condensed oil pumped by the condensed oil pump (4) is not less than 100% of the self-flowing flow of overflow liquid of a single oil skimming and overflow pipe (8).
9. The method of claim 8, wherein: the flow of the condensed oil pumped by the condensed oil pump (4) is 120-200% of the flow of the overflow liquid of the single oil skimming pipe and the overflow pipe (8).
10. The method according to claim 7 or 8 or 9, characterized in that: the pipe diameter of the U-shaped overflow pipe (3) is determined according to that the sealing water gravity flow of the U-shaped overflow pipe (3) is 120-200% of the overflow liquid gravity flow of a single oil skimming and 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 true CN114427615A (en) | 2022-05-03 |
| CN114427615B CN114427615B (en) | 2024-05-14 |
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| 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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