JPH115002A - Degasifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the weight of a structural member of degasifying tower light in weight and to save energy by connecting a supply line of a liquid to be degasified, a take-out line of degasified liquid and a vacuum suction line respectively to a plurality of degasifying towers and providing a pump in the take-out line. SOLUTION: The 1st degasifying tower 2 and the 2nd degasifying tower 3 are arranged in parallel under a tank 1 storing the liquid to be degasified and the supply line 4 for supplying the liquid to be degasified, the take-out line 8 provided with the taking out pump 7 for taking out the degasified liquid and the vacuum suction line 11 provided with a vacuum pump 10 are connected to respective degasifying towers 2, 3. In the degasifier so structured, since a plurality of degasifying towers 2, 3 are provided as a means to increase the throughput of the liquid to be degasified, a low strength structural member can be used to make the cost low. And since the plurality of degasifying towers are provided, only the required numbers of the degasifying towers in the plurality of degasifying towers are operated to enable the efficient operation and to save energy when the supply quantity of the liquid to be degasified to the loading side is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deaerator for removing dissolved gas contained in a liquid to be degassed.

[0002]

2. Description of the Related Art Generally, a liquid to be degassed (eg, a solvent, etc.)
FIG. 4 shows a known degassing device for removing dissolved gas contained in a gas. In FIG. 4, a tank 32 for storing the degassed liquid and an upper part of a degassing tower 33 for vacuum degassing are connected by a supply line 31 for supplying the degassed liquid, and the inside of the degassing tower 33 is vacuum degassed. Vacuum pump 3
The vacuum pump 34 is connected to the upper part of the degassing tower 33 by a vacuum suction line 35. On the other hand, a line 36 for taking out the degassed liquid that has been degassed under vacuum is connected to the lower part of the degassing tower 33, and a pump 37 for taking out the degassed liquid is provided on the way.

In the degassing apparatus having the above-described structure, in order to increase the throughput of the degassed liquid, the dissolved gas is released from the surface area and residence time of the degassed liquid sprayed into the degassing tower 33. A deaeration tower having a sufficient internal volume is required. Therefore, in order to increase the size of the degassing tower 33, it is necessary to make its constituent members heavy, which increases the cost. In addition, when the size of the degassing tower 33 is increased, it is difficult to cope with fluctuations on the load side (when the load is reduced), and there is a problem in terms of energy saving.

[0004]

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a deaerator capable of reducing the weight of components of a deaerator and saving energy.

[0005]

Means for Solving the Problems The present invention has been made to solve the above problems, and the invention according to claim 1 has a plurality of degassing towers having a supply line for a liquid to be degassed. The degassing liquid extraction lines are connected to each other, and a vacuum suction line equipped with a vacuum pump is connected to each of the deaeration towers, and a pump is provided on the extraction line. According to the described invention, a partition is provided in a closed container, first and second deaeration chambers are formed through the partition, and a supply line for a liquid to be degassed and a line for taking out a deaeration liquid are provided in each of the deaeration chambers. And a vacuum suction line equipped with a vacuum pump is connected to each of the deaeration chambers, and a pump is provided in the extraction line. Further, the invention according to claim 3, wherein Gas phase and liquid in both degassing chambers It is characterized in that each provided with communicating portion parts.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described. In the present invention, a supply line for a degassed liquid and a line for taking out a degassed liquid are connected to a plurality of degassing towers, respectively. A deaerator having a configuration in which vacuum suction lines provided with vacuum pumps for vacuum suction in the respective deaeration towers are respectively connected to upper portions of the respective deaeration towers, and a pump for removing a deaeration liquid is provided on the extraction line. It is realized in. The degassing device of the present invention can cope with an increase in the amount of liquid to be degassed by providing a plurality of the degassing towers. Therefore, as compared with the conventional large-capacity single-type degassing tower, it is a small-capacity independent multi-tower type, so the components of each degassing tower may be of low strength, reducing weight and cost. Can be realized. Further, when the supply amount of the deaeration liquid to the load side decreases, the energy saving operation may be performed in which only the required number of the plurality of deaeration towers are operated.

In the above embodiment, a plurality of degassing towers have been described. However, an alternative embodiment will be described. A partition is provided in an airtight container having a predetermined capacity. A vacuum suction line having a vacuum pump for connecting the supply line of the liquid to be degassed and the line for taking out the degassed liquid to each of the degassing chambers, and vacuuming each of the degassing chambers May be connected to the upper part of each of the degassing chambers, and a pump for taking out degassed liquid may be provided in the takeout line.
The inside of the closed container described in this embodiment is divided by a partition wall,
In the connected multi-tower type in which a plurality of degassing chambers are formed, the partition walls serve as a reinforcing member for the closed vessel, so that the strength is increased as a whole, and a lightweight member can be used, and the same effect is realized. be able to. In addition, it is also possible to adopt a configuration in which a communication part is provided in a gas phase part and a liquid phase part of each deaeration chamber partitioned by the partition.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a first embodiment of the present invention. The embodiment described here will be described as a deaerator for removing a dissolved gas contained in a solvent or the like. FIG. 1 is an explanatory view schematically showing a configuration of the deaerator.

In FIG. 1, the structure of the degassing apparatus is such that a first degassing tower 2 and a second degassing tower 3 are arranged in parallel below a tank 1 storing a liquid to be degassed (a solvent in this embodiment). And a supply line 4 for supplying a liquid to be degassed from the tank 1 to the first degassing tower 2 and the second degassing tower 3, respectively.
The supply line 4 connected to the first degassing tower 2 is provided with a first solenoid valve 5, and the supply line 4 connected to the second degassing tower 3 is provided with a second solenoid valve 6. Further, an extraction line 8 having an extraction pump 7 for extracting the degassed liquid from the lower part of the first degassing tower 2 and the second degassing tower 3 was provided and connected to the first degassing tower 2. A third solenoid valve 9 is provided on the extraction line 8. On the other hand, a vacuum suction line 11 provided with a vacuum pump 10 for vacuum-evacuating the inside of the first deaeration tower 2 and the second deaeration tower 3 is provided, and this vacuum suction line 11 is connected to the first and second deaeration towers. A fourth solenoid valve 12 is provided in a vacuum suction line 11 connected to the upper portions of the first and second degassing towers 2 and 3, respectively. Then, the pump 7, the vacuum pump 10, and the respective solenoid valves 5, 6, 9, 1
2 are connected to a controller (not shown) via signal lines (not shown). In addition, nozzles 13 are respectively mounted on the inlets of the liquids to be degassed in the first and second degassing towers 2 and 3.

According to the deaeration apparatus having the above-described structure, a plurality of deaeration towers 2 and 3 are provided as means for increasing the throughput of the liquid to be deaerated. In addition, the components may be of low strength, and the cost can be reduced. Further, first and second solenoid valves 5 and 6 are provided on the supply line 4 for the degassed liquid, and a third solenoid valve 9 is provided on the degassing liquid take-out line 8. Since the fourth electromagnetic valve 12 is provided on the vacuum suction line 11 connected to the second unit 2, when the supply amount of the deaerated liquid is reduced (for example, 50%) due to the load side, a controller (not shown) is used. The supply of the liquid to be degassed to the first degassing tower 2 is stopped based on the above signal. That is, the first solenoid valve 5 provided on the supply line 4 is closed, and the third solenoid valve 9 provided on the take-out line 8 is closed.
Is closed, and only the second degassing tower 3 is operated. At this time, the supply amount of the liquid to be degassed to the second degassing tower 3 is 50% of the total supply amount. The rotation speed of the vacuum pump 10 and the pump 7 is set to an energy-saving operation in which the rotation speed is reduced by 50% from the normal rotation speed by the action of an inverter built in the controller.

Next, a second embodiment of the present invention will be described with reference to the drawings. In the second embodiment, a partition is provided in a closed container having a predetermined capacity as a means for increasing the throughput of the liquid to be degassed described in the first embodiment, and a plurality of deaeration chambers are formed through the partition. Since they are formed, the same members as those in the first embodiment are denoted by the same reference numerals, and overlapping description will be omitted.

FIG. 2 is an explanatory view schematically showing the configuration of the deaerator of the second embodiment. In FIG. 2, a partition 20 is provided in a sealed container 14 having a predetermined capacity, and first and second deaeration chambers 15 and 16 are formed through the partition 20. The degassing chambers 15 and 16 are connected to the supply line 4, the degassing liquid extraction line 8, and the vacuum suction line 11 as in the first embodiment. In the second embodiment, since the partition wall 20 serves as a reinforcing member for the closed container 14, the strength is increased as a whole, and it can be constituted by a lightweight member.

Next, a third embodiment of the present invention will be described with reference to the drawings. In the third embodiment, the gas-phase portions 17 and the liquid-phase portions 18 of the first and second deaeration chambers 15 and 16 partitioned by the partition wall 20 in the closed container 14 described in the second embodiment are provided. Since the communication part 19 is provided, the description other than the communication part 19 is omitted.

In FIG. 3, a partition 20 is placed in a closed container 14.
The first and second degassing chambers 15 and 16 separated by the partition wall 20 are provided with appropriate communication portions 19 in the respective liquid phase portions 18 and the respective gas phase portions 17. This communication part 19
A predetermined hole or notch is formed at a predetermined position of the partition wall 20 by an appropriate means. The communication portion 19 is effective when removing dissolved gas in the liquid to be degassed, and is connected to the liquid phase portion 18.
Since the communication portion 19 is formed in the lower part of the storage space, storage and removal of the degassed liquid are convenient.

[0015]

As described above, according to the present invention, the supply line for the liquid to be degassed and the line for taking out the deaeration liquid are connected to the plurality of deaeration towers, respectively, and the vacuum suction line provided with the vacuum pump. Is connected to each of the deaeration towers, and a pump is provided in the extraction line.Therefore, compared to the conventional large-capacity single deaeration tower system for increasing the throughput of the liquid to be deaerated. Then, the constituent members constituting each of the degassing towers can be made of low-strength materials. Therefore, the weight and cost of each degassing tower can be reduced. Further, since a plurality of deaeration towers are used, when the supply amount of the deaeration liquid to the load side decreases, the energy saving operation in which only the required number of the plurality of deaeration towers are operated can be performed, which is efficient. .

[Brief description of the drawings]

FIG. 1 is an explanatory view schematically showing a configuration of a first embodiment of a deaerator according to the present invention.

FIG. 2 is an explanatory view schematically showing a configuration of a second embodiment of the deaerator according to the present invention.

FIG. 3 is an explanatory view schematically showing a configuration of a third embodiment of a deaerator according to the present invention.

FIG. 4 is an explanatory view schematically showing a configuration of a conventional deaerator.

[Explanation of symbols]

 2 First degassing tower 3 Second degassing tower 4 Supply line 7 Pump 8 Extraction line 10 Vacuum pump 11 Vacuum suction line 14 Closed vessel 15 First degassing chamber 16 Second degassing chamber 17 Gas phase 18 Liquid phase 19 communication part 20 partition

Claims (3)

[Claims] 1. A degassing liquid supply line 4 and a degassing liquid takeout line 8 are connected to a plurality of degassing towers 2 and 3, respectively, and a vacuum suction line 11 equipped with a vacuum pump 10 is connected to each of the degassing towers. A degassing device which is connected to the towers 2 and 3, respectively, and is provided with a pump 7 in the extraction line 8. 2. A partition wall 20 is provided in a sealed container 14, and first and second degassing chambers 15 and 16 are formed through the partition wall 20. Supply line 4
And a degassing liquid extraction line 8 are connected to each other, and a vacuum suction line 11 equipped with a vacuum pump 10 is connected to each of the degassing chambers 1.
A degassing device, wherein the degassing device is connected to each of the extraction lines 5 and 16 and a pump 7 is provided in the extraction line 8. 3. The degassing device according to claim 2, wherein a communicating portion is provided in each of the gas phase portion and the liquid phase portion of the degassing chambers.