Water-sealed tank

Abstract

The utility model provides a water-sealed tank, including cold wall section, hot wall section, flue gas inner cylinder, overflow pipe and water inlet, cold wall section and hot wall section connect and form water-sealed tank shell, cold wall section is provided with flue gas inlet and flue gas outlet, flue gas inner cylinder is provided in the shell, overflow pipe is provided in the shell, overflow pipe is provided in the shell. One end of the flue gas inner barrel is a gas inlet, the other end of the flue gas inner barrel is a gas outlet, the gas inlet is connected with the flue gas inlet, the gas outlet is connected with the inlet end of the overflow pipe, the outlet end of the overflow pipe is communicated with the external environment, and the part, located in the shell, of the overflow pipe is provided with a gas exhaust hole. The exhaust holes are formed in the overflow pipe, water enters and fills the interior of the overflow pipe when a gas medium is blocked and cut off through water, the gas medium and dust remaining in the overflow pipe are discharged into the shell through the exhaust holes, overflow of the gas medium is avoided, and meanwhile accumulation of particulate matter is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline switching, in particular to a water seal tank. Background Art

[0002] The chemical industry usually needs to utilize high-temperature, low-pressure, large-diameter pipeline gas-phase medium interception technology, especially in scenarios with strict requirements on leakage rate. The water seal tank is currently the most commonly used cutting method, with the advantages of easy manufacturing, low cost, and low leakage. The water seal tank is equipped with a flue gas inner cylinder, a water inlet, and an overflow pipe. The flue gas enters the water seal tank through the flue gas inner cylinder. When water sealing is required, water enters the water seal tank from the water inlet and forms a water seal liquid surface in the water seal tank until water flows continuously from the overflow pipe to cut off the flue gas. Since one end of the overflow pipe is connected to the water seal tank and the other end is connected to the external environment, the flue gas inside the water seal tank will overflow into the external environment through the overflow pipe, causing flue gas leakage and environmental pollution. Utility Model Content

[0003] In view of this, the utility model aims to provide a water seal tank to solve the problem of easy leakage at the overflow pipe of the water seal tank.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A water seal tank comprises a cold wall section, a hot wall section, a smoke inner tube, an overflow pipe and a water inlet, wherein the cold wall section and the hot wall section are connected to form a shell of the water seal tank, the cold wall section is provided with a smoke inlet and a smoke outlet, the smoke inner tube is provided inside the shell, one end of the smoke inner tube is an air inlet and the other end is an air outlet, the air inlet is connected to the smoke inlet, the air outlet is connected to the inlet end of the overflow pipe, the outlet end of the overflow pipe is connected to the external environment, and the overflow pipe is provided with an exhaust hole inside the shell. By opening an exhaust hole on the overflow pipe, when the gas medium is cut off by water sealing, water enters and fills the inside of the overflow pipe, and the gas medium and dust remaining inside the overflow pipe are discharged to the inside of the shell through the exhaust hole, so as to avoid the gas medium from overflowing and reduce the accumulation of particulate matter.

[0006] Furthermore, the inlet end of the overflow pipe extends into the interior of the smoke inner tube and is connected to the gas outlet, and the outlet end of the overflow pipe passes through the water seal tank and is connected to the liquid storage tank. The outlet end of the overflow pipe is sealed with the liquid storage tank, which simplifies the operation without operating the valve, and the overflow water can be collected by the liquid storage tank.

[0007] Furthermore, the overflow pipe includes a first drainage pipe, a second drainage pipe and a third drainage pipe, the first drainage pipe and the second drainage pipe are connected to form a U-shaped pipe, the second drainage pipe and the third drainage pipe are connected to form an inverted U-shaped pipe, the first drainage pipe extends into the interior of the smoke inner tube, the second drainage pipe passes through the shell, and the third drainage pipe extends into the liquid storage tank. The connection effect of the U-shaped pipe formed by the first drainage pipe and the second drainage pipe ensures that there is always water in the overflow pipe to prevent the gas medium from overflowing through the overflow pipe. The connected second drainage pipe and the third drainage pipe facilitate the drainage of water flowing out of the overflow pipe into the liquid storage tank.

[0008] Furthermore, the smoke inner cylinder includes a bending portion, and the bending portion is a shrimp-bend structure. The bending portion with a shrimp-bend structure can effectively reduce the resistance of the gas medium.

[0009] Furthermore, the cold wall section is provided with an outer wall, a heat-insulating lining and a wear-resistant lining in sequence from the outside to the inside. By adding the heat-insulating lining, the temperature of the outer wall of the cold wall section is not too high, and the thermal expansion amount when the gas medium enters is reduced. By adding the wear-resistant lining, the cold wall section can resist the scouring of the gas medium.

[0010] Furthermore, the smoke inlet is arranged on the side wall of the cold wall section, and the smoke outlet is arranged on the top of the cold wall section. The gas medium enters from the side of the water seal tank and flows out from the top of the water seal tank, which increases the flow path of the gas medium, effectively reduces the resistance of the gas medium, and improves the safety of the use of the water seal tank.

[0011] Furthermore, the cold wall section includes a side tube and an upper tube, the side tube and the upper tube are vertical and connected, the side tube has a smoke inlet, the upper tube has a smoke outlet, and a reducing cone is arranged at the corner of the side tube and the upper tube, one end of the reducing cone is connected to the side tube, and the other end is connected to the outer wall of the smoke inner tube. The reducing cone is used to block the contact between the high-temperature gas medium entering from the smoke inlet and the weld, reduce the temperature of the weld, and avoid affecting the connection stability of the side tube and the upper tube.

[0012] Furthermore, the hot wall section is provided with a hot wall section outer cylinder and a hot wall section inner cylinder from the outside to the inside, the hot wall section outer cylinder is made of carbon steel material, and the hot wall section inner cylinder is made of stainless steel material. The use of stainless steel material enables the hot wall section inner cylinder to withstand the high temperature of the gas medium and is corrosion-resistant. The hot wall section outer cylinder made of carbon steel material unifies the thermal expansion coefficients of the cold wall section, the overflow pipe and the hot wall section outer cylinder, avoiding the occurrence of leakage points caused by tearing of the pipe mouth due to thermal expansion, which is conducive to ensuring the function of the water seal tank in isolating the gas medium.

[0013] Furthermore, the hot wall section is provided with a water inlet, a water outlet and a manhole. Water enters the water seal tank from the water inlet and forms a water seal liquid surface in the hot wall section to block the gas medium. The water outlet is used to discharge the water inside the water seal tank.

[0014] Compared with the prior art, the water seal tank described in the utility model has the following advantages:

[0015] (1) The gas medium and dust remaining in the overflow pipe are discharged into the shell through the exhaust hole to prevent the gas medium from overflowing and reduce the accumulation of particulate matter;

[0016] (2) The reducing cone is used to block the contact between the high-temperature gas medium entering from the smoke inlet and the weld, thereby reducing the temperature of the weld and avoiding affecting the connection stability of the side tube and the upper tube;

[0017] (3) The gas medium enters from the side and exits from the top, and the smoke inner tube with a shrimp-bend structure can effectively reduce the resistance of the gas medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0019] Figure 1 This is a structural schematic diagram of a water seal tank described in the utility model;

[0020] Figure 2 for Figure 1 A partial enlarged view of point A.

[0021] Description of reference numerals:

[0022] 1. Cold wall section; 11. Smoke inlet; 12. Smoke outlet; 13. Thermal insulation lining; 14. Wear-resistant lining; 2. Hot wall section; 3. Smoke inner tube; 31. Air inlet; 32. Air outlet; 33. Bending part; 4. Overflow pipe; 41. First drainage pipe; 42. Second drainage pipe; 43. Third drainage pipe; 44. Exhaust hole; 5. Water inlet; 6. Water outlet; 7. Liquid storage tank; 8. Variable cone; 9. Manhole. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. The embodiments described in the present invention are exemplary and intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0024] It should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0025] like Figure 1 As shown, a water seal tank of the utility model comprises a cold wall section 1, a hot wall section 2, a smoke inner tube 3, an overflow pipe 4 and a water inlet 5, wherein the cold wall section 1 and the hot wall section 2 are connected to form a shell of the water seal tank, the cold wall section 1 is provided with a smoke inlet 11 and a smoke outlet 12, the smoke inner tube 3 is provided inside the shell, one end of the smoke inner tube 3 is an air inlet 31 and the other end is an air outlet 32, the air inlet 31 is connected to the smoke inlet 11, the air outlet 32 ​​is connected to the inlet end of the overflow pipe 4, the outlet end of the overflow pipe 4 is connected to the external environment, and the overflow pipe 4 is provided with an exhaust hole 44 inside the shell. During the use of the water seal tank, since the air outlet 32 ​​is connected to the overflow pipe 4, the gas medium entering the water seal tank will inevitably enter the overflow pipe 4, and may be discharged into the external environment along the overflow pipe 4, resulting in the risk of gas medium leakage. At the same time, the gas medium will also carry particulate dust into the overflow pipe 4. By opening the exhaust hole 44 on the overflow pipe 4, when the gas medium is cut off by water sealing, water enters and fills the overflow pipe 4, and the gas medium and dust remaining in the overflow pipe 4 are discharged into the shell through the exhaust hole 44, thereby preventing the gas medium from overflowing and reducing the accumulation of particulate matter. Specifically, the gas medium is the flue gas of the catalytic cracking unit.

[0026] As a preferred embodiment of the utility model, the inlet end of the overflow pipe 4 extends into the interior of the smoke inner tube 3 and is connected to the air outlet 32, and the outlet end of the overflow pipe 4 passes through the water seal tank and is connected to the liquid storage tank 7. When water sealing is performed, the water inlet 5 is opened, and water enters the interior of the water seal tank along the water inlet 5 to cut off the gas medium. When water is discharged from the liquid storage tank 7 at the outlet end of the overflow pipe 4, the water inlet 5 is closed or the opening of the water inlet 5 is reduced until the water at the outlet continuously flows out. Compared with the prior art in which a valve is set on the overflow pipe 4 and the opening of the valve is used to operate the connection or closure of the overflow pipe 4, the utility model uses the liquid storage tank 7 to block the outlet end of the overflow pipe 4, and there is no need to operate the valve, which simplifies the operation, and the overflow water can be automatically collected by the liquid storage tank 7.

[0027] Further, the overflow pipe 4 includes a first drainage pipe 41, a second drainage pipe 42 and a third drainage pipe 43, the first drainage pipe 41 and the second drainage pipe 42 are connected to form a U-shaped pipe, the second drainage pipe 42 and the third drainage pipe 43 are connected to form an inverted U-shaped pipe, the first drainage pipe 41 extends into the interior of the smoke inner tube 3, the second drainage pipe 42 passes through the shell, and the third drainage pipe 43 extends into the liquid storage tank 7. The first drainage pipe 41 is arranged inside the smoke inner tube 3, so as to better utilize water to achieve the sealing and cutting effect on the gas medium. The U-shaped pipe formed by the first drainage pipe 41 and the second drainage pipe 42 is used to ensure that there is always water in the overflow pipe 4 to prevent the gas medium from overflowing through the overflow pipe 4. The connected second drainage pipe 42 and the third drainage pipe 43 are used to facilitate the drainage of water flowing out of the overflow pipe 4 into the liquid storage tank 7. Specifically, the first drainage pipe 41 is connected to the inner wall of the smoke inner tube 3 through fasteners, and the liquid storage tank 7 is connected to the outer wall of the shell through fasteners, which is used to stably connect the overflow pipe 4 and the liquid storage tank 7 to the water seal tank.

[0028] As a preferred embodiment of the utility model, the flue gas inner tube 3 includes a bending portion 33, and the bending portion 33 is a shrimp-bend structure. The flue gas inner tube 3 is an inlet pipe for the gas medium, and the bending portion 33 with a shrimp-bend structure can effectively reduce the resistance of the gas medium. Since the flue gas inner tube 3 will directly contact the high-temperature gas medium, the flue gas inner tube 3 is made of a high-temperature resistant material, such as carbon steel. The air inlet 31 of the flue gas inner tube 3 is located in the cold wall section 1, and the air outlet 32 ​​is located in the hot wall section 2, and the air outlet 32 ​​extends into the water sealing liquid of the hot wall section 2.

[0029] For the cold wall section 1, in order to improve the service life and reliability of the water seal tank, the cold wall section 1 is provided with an outer wall, a heat-insulating lining 13 and a wear-resistant lining 14 from the outside to the inside. Furthermore, the outer wall is made of carbon steel, which is used to make the cold wall section 1 and the flue gas inner tube 3 connected thereto have the same material, so that their thermal conductivity coefficients are consistent and the construction is convenient. By adding the heat-insulating lining 13, the temperature of the outer wall of the cold wall section 1 will not be too high, and the thermal expansion when the gas medium enters will be reduced. By adding the wear-resistant lining 14, the cold wall section 1 can resist the scouring of the gas medium.

[0030] The smoke inlet 11 is arranged on the side wall of the cold wall section 1, and the smoke outlet 12 is arranged on the top of the cold wall section 1. The gas medium enters from the side of the water seal tank and flows out from the top of the water seal tank, which increases the flow path of the gas medium, effectively reduces the resistance of the gas medium, and improves the safety of the water seal tank. Figure 1In the embodiment, the cold wall section 1 includes a side tube and an upper tube, the side tube and the upper tube are vertical and connected, the side tube has a smoke inlet 11, and the upper tube has a smoke outlet 12. The side tube and the upper tube are usually connected together by welding. Considering the weld formed during welding, a reducing cone 8 is set at the corner of the side tube and the upper tube, one end of the reducing cone 8 is connected to the side tube, and the other end is connected to the outer wall of the smoke inner tube 3, as shown in FIG. Figure 2 As shown. The reducing cone 8 is used to block the contact between the high-temperature gas medium entering from the flue gas inlet 11 and the weld, thereby reducing the temperature of the weld and avoiding affecting the connection stability of the side tube and the upper tube. At the same time, the reducing cone 8 can provide good support, which is beneficial to the connection stability of the cold wall section 1 and the flue gas inner tube 3.

[0031] For the hot wall section 2, the hot wall section 2 is provided with a hot wall section outer tube and a hot wall section inner tube in sequence from the outside to the inside, the hot wall section outer tube is made of carbon steel material, and the hot wall section inner tube is made of stainless steel material. The hot wall section inner tube arranged on the inside needs to be in contact with the high-temperature gas medium frequently, and the use of stainless steel material enables the hot wall section inner tube to withstand the high temperature of the gas medium and be corrosion-resistant. The hot wall section outer tube made of carbon steel material unifies the thermal expansion coefficients of the cold wall section 1, the overflow pipe 4 and the hot wall section outer tube, avoiding the occurrence of leakage points caused by tearing of the pipe mouth due to thermal expansion, which is conducive to ensuring the function of the water seal tank in isolating the gas medium.

[0032] As a preferred embodiment of the utility model, the hot wall section 2 is provided with a water inlet 5, a water outlet 6 and a manhole 9. Water enters the water seal tank from the water inlet 5 and forms a water seal liquid surface in the hot wall section 2 to block the gas medium. The water outlet 6 is used to discharge the water inside the water seal tank. The water inlet 5 and the water outlet 6 can be set as one opening.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water seal tank, comprising a cold wall section (1), a hot wall section (2), a smoke inner tube (3), an overflow pipe (4) and a water inlet (5), wherein the cold wall section (1) and the hot wall section (2) are connected to form a shell of the water seal tank, the cold wall section (1) is provided with a smoke inlet (11) and a smoke outlet (12), the smoke inner tube (3) is arranged inside the shell, one end of the smoke inner tube (3) is an air inlet (31) and the other end is an air outlet (32), the air inlet (31) is connected to the smoke inlet (11), the air outlet (32) is connected to the inlet end of the overflow pipe (4), and the outlet end of the overflow pipe (4) is connected to the external environment, characterized in that: The overflow pipe (4) is provided with an exhaust hole (44) located inside the shell.

2. The water seal tank according to claim 1, characterized in that: The inlet end of the overflow pipe (4) extends into the interior of the smoke inner tube (3) and is connected to the gas outlet (32), and the outlet end of the overflow pipe (4) passes through the water seal tank and is connected to the liquid storage tank (7).

3. The water seal tank according to claim 2, characterized in that: The overflow pipe (4) comprises a first drainage pipe (41), a second drainage pipe (42) and a third drainage pipe (43); the first drainage pipe (41) and the second drainage pipe (42) are connected to form a U-shaped pipe, the second drainage pipe (42) and the third drainage pipe (43) are connected to form an inverted U-shaped pipe, the first drainage pipe (41) extends into the interior of the smoke inner tube (3), the second drainage pipe (42) passes through the shell, and the third drainage pipe (43) extends into the interior of the liquid storage tank (7).

4. The water seal tank according to claim 1, characterized in that: The smoke inner tube (3) comprises a bending portion (33), and the bending portion (33) is a shrimp-bend structure.

5. The water seal tank according to claim 1, characterized in that: The cold wall section (1) is provided with an outer wall, a heat insulating lining (13) and a wear-resistant lining (14) in sequence from the outside to the inside.

6. The water seal tank according to claim 1, characterized in that: The smoke inlet (11) is arranged on the side wall of the cold wall section (1), and the smoke outlet (12) is arranged on the top of the cold wall section (1).

7. The water seal tank according to claim 6, characterized in that: The cold wall section (1) comprises a side tube and an upper tube, the side tube and the upper tube are vertical and connected, the side tube is provided with a smoke inlet (11), the upper tube is provided with a smoke outlet (12), a reducing cone (8) is arranged at the corner of the side tube and the upper tube, one end of the reducing cone (8) is connected to the side tube, and the other end is connected to the outer wall of the smoke inner tube (3).

8. The water seal tank according to claim 1, characterized in that: The hot wall section (2) is provided with a hot wall section outer cylinder and a hot wall section inner cylinder in sequence from the outside to the inside; the hot wall section outer cylinder is made of carbon steel material, and the hot wall section inner cylinder is made of stainless steel material.

9. The water seal tank according to claim 1, characterized in that: The hot wall section (2) is provided with a water inlet (5), a water outlet (6) and a manhole (9).

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