CN215099631U - Sealing device for purge gas of volatile storage tank - Google Patents
Sealing device for purge gas of volatile storage tank Download PDFInfo
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- CN215099631U CN215099631U CN202120662377.9U CN202120662377U CN215099631U CN 215099631 U CN215099631 U CN 215099631U CN 202120662377 U CN202120662377 U CN 202120662377U CN 215099631 U CN215099631 U CN 215099631U
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Abstract
The utility model discloses a sealing device for the purge gas of a volatile storage tank, which is arranged at the top of the storage tank and comprises a first tubular structure, a second tubular structure, a supporting structure, an open overflow water storage structure and a sealing cover, wherein the bottom of the first tubular structure is communicated with the storage tank, the second tubular structure is coaxially arranged outside the first tubular structure, and the supporting structure is arranged between the first tubular structure and the second tubular structure and is used for supporting and installing the sealing cover; the sealing cover comprises a cover body and a third tubular structure arranged at the lower part of the cover body, and the third tubular structure is coaxially arranged between the first tubular structure and the second tubular structure; one side of the second tubular structure is provided with a water inlet for inputting process water, the other side of the second tubular structure is communicated with the overflow water storage structure, and a water outlet for outputting the process water is arranged above the side of the overflow water storage structure. The sealing device can seal volatile components in the normal pressure equipment, and simultaneously ensures that the design pressure of the equipment is close to the normal pressure.
Description
Technical Field
The utility model relates to a speed gassing and handle technical field, especially relate to a sealing device that is used for volatile storage tank to speed gassing.
Background
The liquid such as soda ash mother liquor and ammoniacal brine contains ammonia gas. Storage tanks for storing these liquids, such as ammonia brine tanks, caustic discharge tanks, mother liquor tanks, ammonia ii clarifiers, etc., are typically atmospheric equipment that is open to the atmosphere, so that ammonia gas is vented from the storage tanks to the atmosphere. Especially, when the temperature is higher in summer, the volatilization of ammonia gas is more obvious. The emission of ammonia gas increases the consumption of ammonia and also creates a harsh operating environment on site.
With the improvement of the environmental protection discharge standard and the requirement of the field operation environment in China, the storage tanks need to be closed, and the purge gas of the storage tanks is not allowed to be discharged into the atmosphere. If these devices are sealed, safety and breathing valves are installed on the devices to prevent low vacuum and overpressure conditions in the devices. The safety valve needs a certain pressure for jumping, so the design pressure of the equipment is increased, and the investment of the equipment is increased. Especially, the ammonia II is clarified and poked, the mother liquor barrel and other equipment, because of the particularity of the equipment structure, if the design pressure is improved, the structure of the equipment needs to be changed, and the investment of the equipment is greatly increased. Meanwhile, the mother liquor is easy to crystallize to block the pipe orifice, so that the safety valve cannot jump and the breather valve cannot suck air. Because the storage tank contains ammonia gas, the sucked air possibly reaches the explosion limit of the ammonia gas, and potential safety hazards are brought to equipment. After the safety valve and the breather valve are added, ammonia gas is still discharged into the atmosphere, and the emission of the ammonia gas cannot be avoided. For the above reasons, the direct sealing of ammonia-containing atmospheric equipment in soda plants poses a series of problems.
Therefore, there is a need for a low-cost sealing device or apparatus in soda plants to solve the problem of purge gas discharge without changing the structure of the original apparatus and increasing the cost of the apparatus.
SUMMERY OF THE UTILITY MODEL
The purge gas in the normal-pressure storage tank of the soda plant contains ammonia gas, and is discharged into the atmosphere, so that the severe operation environment on site is caused, and the consumption of ammonia is increased. In order to improve the field operation environment, reduce the ammonia and consume, the utility model discloses set up a sealing device on the storage tank that contains volatile ammonia, this sealing device can prevent the outer row of ammonia, makes the design pressure of storage tank equipment be close the ordinary pressure simultaneously, can not increase the investment of equipment. The sealing device is not only suitable for the normal pressure liquid storage tank containing ammonia gas, but also suitable for other normal pressure storage tanks containing volatile components, such as a hydrochloric acid storage tank and the like.
The utility model adopts the technical scheme as follows:
a sealing device for the purge gas of a volatile storage tank is arranged at the top of the storage tank and comprises a first tubular structure, a second tubular structure, a supporting structure, an open overflow water storage structure and a sealing cover, wherein the bottom of the first tubular structure is communicated with the storage tank, the second tubular structure is coaxially arranged outside the first tubular structure, and the supporting structure is arranged between the first tubular structure and the second tubular structure and used for supporting and mounting the sealing cover; the sealing cover comprises a cover body and a third tubular structure arranged at the lower part of the cover body, the third tubular structure is coaxially arranged between the first tubular structure and the second tubular structure, and the sealing cover is placed on the supporting structure; a water inlet for inputting process water is formed in one side of the second tubular structure, the other side of the second tubular structure is communicated with the overflow water storage structure, and a water outlet for outputting the process water is formed in the upper side of the overflow water storage structure; the first tubular structure, the supporting structure, the sealing cover and the input process water jointly form a closed inner cavity, and the second tubular structure, the third tubular structure and the input process water jointly form an open outer annular cavity.
Furthermore, the supporting structure is provided with a plurality of beams which are arranged in a radial direction, and two ends of each beam are respectively connected with the first tubular structure and the second tubular structure.
Further, the overflow water storage structure is arranged on the outer side of the second tubular structure, and the bottom of the overflow water storage structure is communicated with the second tubular structure through a bent pipe.
Further, the first tubular structure and the second tubular structure are provided as short tubes.
Further, a sawtooth structure is arranged at the bottom of the third tubular structure.
The beneficial effects of the utility model reside in that:
the utility model discloses a sealing device can be sealed with the volatile component in the ordinary pressure equipment, and the design pressure that can guarantee equipment again simultaneously is close the ordinary pressure. The sealing device can be arranged on a storage tank containing volatile ammonia gas to prevent the ammonia gas from being discharged outside, and simultaneously, the design pressure of storage tank equipment is close to the normal pressure, so that the equipment investment is not increased. The sealing device is not only suitable for the normal pressure liquid storage tank containing ammonia gas, but also suitable for other normal pressure storage tanks containing volatile components, such as a hydrochloric acid storage tank and the like.
Drawings
FIG. 1 is a schematic structural view of a sealing device for purge gas from a volatile storage tank according to the present invention;
reference numerals: the water storage structure comprises a first tubular structure-1, a second tubular structure-2, a supporting structure-3, an overflow water storage structure-4, a cover body-51, a third tubular structure-52, a sawtooth structure-53, a water inlet-6, a water outlet-7, a bent pipe-8, an inner cavity-9 and an outer annular cavity-10.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, the embodiments of the present invention will be described. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
This embodiment provides a seal for the purge gas from a volatile reservoir, located at the top of the reservoir. As shown in fig. 1, the sealing device comprises a first tubular structure 1, a second tubular structure 2, a supporting structure 3, an open overflow water storage structure 4 and a sealing cover, wherein the bottom of the first tubular structure 1 is communicated with a storage tank, the second tubular structure 2 is coaxially arranged outside the first tubular structure 1, and the supporting structure 3 is arranged between the first tubular structure 1 and the second tubular structure 2 and is used for supporting and installing the sealing cover. The sealing cover comprises a cover body 51 and a third tubular structure 52 arranged at the lower part of the cover body 51, the third tubular structure 52 is coaxially arranged between the first tubular structure 1 and the second tubular structure 2, and the sealing cover is placed on the supporting structure 3. One side of the second tubular structure 2 is provided with a water inlet 6 for inputting process water, the other side is communicated with the overflow water storage structure 4, and a water outlet 7 for outputting the process water is arranged above the side of the overflow water storage structure 4. The first tubular structure 1, the support structure 3, the sealing cover and the input process water together form a closed inner cavity 9, and the second tubular structure 2, the third tubular structure 52 and the input process water together form an open outer annular cavity 10. More specifically, the overflow water storage structure 4 is disposed outside the second tubular structure 2, and the bottom of the overflow water storage structure is communicated with the second tubular structure 2 through the elbow pipe 8.
The working principle of the sealing device is as follows:
(1) during normal operation, a small amount of uninterrupted process water flows into the outer annular cavity 10 and the inner cavity 9 from the water inlet 6 and is discharged through the outer annular cavity 10, the inner cavity 9, the bent pipe 8, the overflow water storage structure 4 and the water outlet 7 in sequence.
(2) When the storage tank is at normal pressure, the liquid levels of the inner cavity 9 and the outer annular cavity 10 are kept horizontal with the water outlet 7.
(3) During operation, when micro-positive pressure occurs in the storage tank due to operation conditions or air temperature changes, the liquid level in the closed inner cavity 9 is lowered, and water in the inner cavity 9 is pressed out. The pressed water is discharged through the elbow pipe 8, the overflow water storage structure 4 and the water outlet 7 in sequence. The liquid level of the outer annular cavity 10 is kept constant, and the maximum liquid seal height of the positive pressure water seal is the size h1。
(4) When micro negative pressure occurs in the storage tank, process water enters the inner cavity 9, the liquid level in the inner cavity 9 rises, and the outer annular cavity 10The liquid level of the negative pressure water seal is kept unchanged, and the highest liquid seal height of the negative pressure water seal is the size h2. Occasionally extreme negative pressure operating conditions occur, with a small amount of water entering the sump, which is permissible for soda production operations.
The sealing device can seal volatile components (ammonia gas and the like) in normal pressure equipment (such as a storage tank) and can ensure that the design pressure of the equipment is close to normal pressure. By varying the dimension h according to the process conditions1And dimension h2The height of the liquid seal is adjusted, and the discharged process water can be collected and then added into a soda mother liquor system.
In another embodiment of the present invention, the supporting structure 3 is provided as a plurality of radially arranged beams, both ends of which are connected to the first tubular structure 1 and the second tubular structure 2, respectively.
In a further embodiment of the invention, the first tubular structure 1 and the second tubular structure 2 are provided as short tubes.
In another embodiment of the present invention, the bottom of the third tubular structure 52 is provided with a sawtooth structure 53, and when the pressure in the storage tank changes, the sawtooth structure 53 can gradually change the gas flow area entering or exiting the inner cavity 9, thereby avoiding sudden change of the gas flow rate and causing fluctuation of the liquid level.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise forms disclosed herein, and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the invention as defined by the appended claims. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the present invention is directed must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either a wired or wireless connection.
Claims (5)
1. A sealing device for the purge gas of a volatile storage tank is arranged at the top of the storage tank and is characterized by comprising a first tubular structure, a second tubular structure, a supporting structure, an open overflow water storage structure and a sealing cover, wherein the bottom of the first tubular structure is communicated with the storage tank, the second tubular structure is coaxially arranged outside the first tubular structure, and the supporting structure is arranged between the first tubular structure and the second tubular structure and used for supporting and mounting the sealing cover; the sealing cover comprises a cover body and a third tubular structure arranged at the lower part of the cover body, the third tubular structure is coaxially arranged between the first tubular structure and the second tubular structure, and the sealing cover is placed on the supporting structure; a water inlet for inputting process water is formed in one side of the second tubular structure, the other side of the second tubular structure is communicated with the overflow water storage structure, and a water outlet for outputting the process water is formed in the upper side of the overflow water storage structure; the first tubular structure, the supporting structure, the sealing cover and the input process water jointly form a closed inner cavity, and the second tubular structure, the third tubular structure and the input process water jointly form an open outer annular cavity.
2. A seal for volatile reservoir purge gas according to claim 1, wherein said support structure is provided as a plurality of radially disposed beams, said beams having opposite ends connected to said first and second tubular structures, respectively.
3. The sealing device for the purge gas of the volatile storage tank as claimed in claim 1, wherein the overflow water storage structure is disposed outside the second tubular structure, and the bottom of the overflow water storage structure is communicated with the second tubular structure through an elbow.
4. A seal for volatile reservoir purge gas as in claim 1 wherein said first tubular structure and said second tubular structure are provided as short tubes.
5. The sealing device for the purge gas of the volatile storage tank as claimed in any one of claims 1 to 4, wherein the bottom of the third tubular structure is provided with a sawtooth structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120662377.9U CN215099631U (en) | 2021-03-31 | 2021-03-31 | Sealing device for purge gas of volatile storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120662377.9U CN215099631U (en) | 2021-03-31 | 2021-03-31 | Sealing device for purge gas of volatile storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215099631U true CN215099631U (en) | 2021-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120662377.9U Active CN215099631U (en) | 2021-03-31 | 2021-03-31 | Sealing device for purge gas of volatile storage tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215099631U (en) |
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2021
- 2021-03-31 CN CN202120662377.9U patent/CN215099631U/en active Active
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