JPH0410897Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The present invention relates to a regeneration device for dehumidifying agents such as ethylene glycol, which dehumidifies and regenerates various dehumidifying agents such as ethylene glycol and B ethylene glycol containing water. It is.

[Prior art]

Ethylene glycol and B that have deteriorated due to moisture
BACKGROUND ART There is known a dehumidifier regeneration device that regenerates a dehumidifier such as ethylene glycol by heating it to dehumidify it. FIG. 1 is a schematic configuration diagram of a conventional regeneration device of this type. To explain this based on the same figure, inside a reboiler 3 equipped with a burner 1 and a chimney 2, there is a U-shaped regenerator connected to the burner 1. The burner 1 is connected to a natural gas source 6 by a pipe 5. In addition, another pipe 7 branched from the middle of the pipe 5 is inserted into the other end of the reboiler 3 provided in the reboiler 3, and above the insertion part, a large surface area is provided to complicate the flow. A filling area is provided in which a plastic pole ring 8, which is a type of filling part, is inserted to improve reaction efficiency. 9 is reboiler 3
A regeneration tower is installed vertically in the central part of the tower in communication with the regeneration tower, and at the bottom thereof, there is provided a filling area in which another pole ring 10 is charged, and at the upper part, unregenerated dehumidifying agent is stored. Piping 12 connected to the supply port 11 of
is being involved. After coming out of the regeneration tower 9, this pipe 12 passes through a heat exchanger 13 and opens into the lower part of the regeneration tower 9, and the pipe 14 connected to the reboiler 3 passes through the heat exchanger 13 and pump 15 before being regenerated. It is connected to the desiccant recovery port 16. 17 is a demister for removing moisture.

In the conventional regeneration device configured as described above, when ethylene glycol, for example, which has deteriorated due to moisture is supplied from the supply port 11 into the pipe 12,
This ethylene glycol is heated in 12 parts of piping inside the regeneration tower 9 and in the heat exchanger 13, and then returns to the regeneration tower 9, where it is lowered downward. It flows down through its filling area 10 into the reboiler 3 and is discharged via the reboiler 3. At this time, natural gas is burned in the burner 1 in the ethylene glycol liquid kept at a constant height in the reboiler 3, and the heat exchanger tube 4
Since the wet ethylene glycol is circulated through the reboiler 3 and is injected through the pipe 7 to the bottom of the filling area 8 provided in the overflow chamber of the reboiler 3, the moist ethylene glycol is absorbed by the heat of the combustion gas and the regeneration tower 9. The rising dry gas is first heated in the pipe 12 at the upper part of the regeneration tower 9, and further, after being discharged from the pipe 12, it is stirred and heated in the reboiler 3. As a result, the regenerated ethylene glycol from which moisture has been removed is discharged from below the overflow chamber of the reboiler 3 by the rotation of the pump 15, and after heating the unregenerated ethylene glycol in the heat exchanger 13, it is recovered from the recovery port 16. The natural gas used for regeneration is then released into the atmosphere from the upper opening of the regeneration tower 9.

However, in such conventional regenerators, the gas used to regenerate ethylene glycol is released into the atmosphere from the regenerator 9 while still at a high temperature, resulting in poor gas utilization efficiency and poor heat transfer efficiency of the reboiler. The regeneration effect in the reboiler was also not satisfactory.

[Summary of the idea]

The present invention was developed in view of the above points, and a second regeneration tower is provided in the dehumidifier discharge pipe of a horizontal reboiler equipped with an upright regeneration tower that communicates with the central part. By supplying dry gas and configuring the dry gas discharged from the regeneration tower to be ejected to the desiccant layer in the reboiler, the efficiency of gas utilization is improved, and by stirring the gas in the reboiler, The present invention provides a desiccant regeneration device that improves heat transfer efficiency and regeneration effect. Embodiments of the present invention will be described in detail below with reference to the drawings.

[Example] FIG. 2 is a schematic configuration diagram showing a desiccant regenerating device according to the present invention, and ethylene glycol is illustrated as the desiccant. Components in the figure denoted by the same reference numerals as those in FIG. 1 have the same configuration, so detailed explanation thereof will be omitted. A regeneration tower 9 is erected in the center of the horizontal reboiler 3, which is equipped with a burner 1, a chimney, and a heat transfer tube 4. A regeneration tower 9 has a pipe 12 connected to an ethylene glycol supply port 11. This pipe 12 passes through a heat exchanger 13 and then opens into the regeneration tower 9. Natural gas is supplied to the burner 1 of the reboiler 3 via a pipe 5, and a pipe 14 connected to the bottom of the reboiler 3 is connected to an ethylene glycol recovery port 16 via the heat exchanger 13 and pump 15. has been done.

In such a regenerator, a second regenerator 20 is disposed in the pipe 14, which is a discharge conduit for recycled ethylene glycol, with the bottom thereof located on the downstream side of the discharge path. The gas supply pipe 5 is connected to the gas supply pipe 21 . Further, the pipe 22 connected to the top of the second regeneration tower 20 is inserted into the bottom of the reboiler 3 and below the heat exchanger tubes 4 and extends in the horizontal direction. Multiple gas ejection holes 23
is opened. Reference numerals 10 and 24 respectively indicate filling areas in which plastic pole rings are inserted, and 25 indicates a partition plate.

In the regenerator configured as described above, when ethylene glycol that has deteriorated due to moisture is supplied from the supply port 11 to the pipe 12, this ethylene glycol returns to the regenerator 9 via the regenerator 9 and the heat exchanger 13. , falls into reboiler 3. At this time, natural gas is burned in the burner 1 and circulated in the heat transfer tube 4, so the moist ethylene glycol is first heated in the pipe 12 at the top of the regeneration tower 9 by the heat of the combustion gas, and then discharged from the pipe 12. It is then heated in the post-reboiler 3. In this apparatus, by providing the second regeneration tower 20, the natural gas sent through the gas supply pipe 21 rises inside the second regeneration tower 20, passes through the pipe 22, and is ejected to the bottom of the reboiler 3. Since the ethylene glycol in the reboiler 3 is ejected from the holes 23 toward the lower side of the heat transfer tubes 4, the ethylene glycol in the reboiler 3 is stirred and comes into active contact with the heat transfer tubes 4, increasing the heat transfer effect, and the ejected gas Almost all moisture is removed by heating itself. The ethylene glycol from which water has been almost removed in this way is transferred to the reboiler 3 by the rotation of the pump 15.
When it passes through the second regeneration tower 20, it is further heated by the dry gas inside, and moisture is completely removed. The ethylene glycol thus dehumidified is recovered from the recovery port 16 after heating the unregenerated ethylene glycol in a heat exchanger. On the other hand, the gas that has been fully utilized by reheating the ethylene glycol in the second regeneration tower 20 and the reboiler 3 is further used for heating in the regeneration tower 9, becomes low temperature, and is discharged from the top of the regeneration tower 9 to the atmosphere. released.

In this example, ethylene glycol was used as an example of a desiccant agent, but the same method can be used to regenerate other desiccant agents such as B ethylene glycol.

[Effect of idea]

As is clear from the above explanation, according to the present invention, in the desiccant regeneration device, the second regenerating agent is installed in the dehumidifying agent discharge pipe of the horizontal reboiler, which is equipped with an upright regenerating tower that communicates with the central part. By providing a tower, supplying dry gas to the lower part of the tower, and configuring the dry gas discharged from the regeneration tower to be ejected to the desiccant layer in the reboiler and below the heat exchanger tubes,
The gas that heated the dehumidifier in the second regeneration tower is led to the reboiler and ejected, where the dehumidifier is heated again while being agitated by the ejection, improving the heat transfer efficiency of the gas and regenerating the dehumidifying agent. In addition to significantly improving performance, the gas that was conventionally released into the atmosphere after one heating process is reused for heating and then released, improving gas utilization efficiency and reducing regeneration costs.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a conventional desiccant regeneration device, and FIG. 2 is a schematic diagram of an embodiment of a desiccant regeneration device according to the present invention. 1... Burner, 3... Reboiler, 4... Heat exchanger tube, 5... Piping, 6... Natural gas source, 8, 10,
24... Filling area, 9... Regeneration tower, 14... Piping,
20...Second regeneration tower, 21...Piping, 22...Piping, 23...Gas blowout hole.

Claims (1)

[Scope of utility model registration request] A reboiler 3 having a heat transfer tube 4 connected to a gas combustion device 1 and a regeneration tower 9 erected in communication with the reboiler 3 are provided, and the moisture absorbing and dehumidifying agent supplied to the regeneration tower 9 is converted into combustion gas heat and transferred to the reboiler 3. In a desiccant regeneration device that dehumidifies and regenerates by heating with supplied dry gas, the desiccant discharge pipe 14 from the reboiler 3
A second regeneration tower 20 is provided inside the reboiler 3, a dry gas supply pipe 21 is connected to the lower part of the second regeneration tower 20, and a pipe 22 connected to the gas layer at the top of the second regeneration tower is connected to the bottom of the reboiler 3 and connected to the dry gas supply pipe 21. A regenerating device for a dehumidifying agent, which is inserted into a lower position of a heat transfer tube 4, and a plurality of gas ejection holes 23 are provided in this insertion portion.