JP3799672B2 - Drain separator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drain separation device provided in an introduction line for introducing combustion exhaust gas into a analyzer as a measurement gas from a flue such as an incinerator and removing moisture in the measurement gas.
[0002]
[Prior art]
FIG. 1 shows an example of a conventional drain separator. Measurement gas such as flue gas is in a state of saturation humidity of about 250 ° C., for example. Such a measurement gas is guided by the introduction pipe 2 to a drain separator 4 having a filter 5 and in an airtight state at room temperature. In the drain separator 4, dewed moisture is removed when the temperature of the measurement gas decreases from about 250 ° C. to room temperature, and solids are also removed by the filter 5. The water removed by the drain separator 4 is discharged to the drain pot 8 by the first drain discharge pipe 6. In the drain pot 8, a discharge port 10 is provided at a predetermined height from the bottom, and the excess drain is discharged. A certain amount of drain 12 is stored in the drain pot 8, and the lower end of the drain discharge pipe 6 is immersed in the drain 12.
[0003]
The measurement gas from which the drain is separated is led to a cooler 14 maintained at about 5 ° C. at the upper end of the drain separator 4. In the cooler 14, the drain separated by cooling is received by the safety pot 16, and discharged to the drain pot 12 through the second drain discharge pipe 18. The safety pot 16 is also kept airtight, and the drain discharge pipe 18 is provided at its upper end with a receiving port 20 for receiving a drain separated from the cooler 14 in the upper part of the safety pot 16. The drain discharge pipe 18 has a lower end at the drain pot 8. It is immersed in a drain in a water sealing inner cylinder 22 provided inside. The drain amount CC1 of the water sealing inner cylinder 22 is set to be smaller than the capacity CC2 determined by the distance from the lower part in the safety pot 16 to the receiving port 20.
The introduction path of the measurement gas that has passed through the cooler 14 is connected to an analyzer by a pump 26 via an on-off valve 24.
[0004]
The measurement gas is cooled to room temperature by the drain separator 4 to remove the drain, and then cooled again by the cooler 14 to remove the drain, and then guided to the analyzer for analysis. The drain removed by the drain separator 4 and the drain removed by the cooler 14 are both discharged to the drain pot 8.
[0005]
In this drain separator, when the negative pressure of the measuring gas introduction line rises due to the negative pressure of the flue rising or the introduction pipe 2 being clogged, the drain in the water sealing inner cylinder 22 becomes a safety pot. 16 is aspirated. Since the capacity CC2 of the safety pot 16 is set larger than the drain amount CC1 of the water sealing inner cylinder 22, the drain of the water sealing inner cylinder 22 disappears, and the drain discharge pipe 18 conducts to the atmosphere, and the negative pressure break. This prevents the drain from being mixed into the analyzer.
[0006]
[Problems to be solved by the invention]
In the case of a sudden increase in negative pressure, the safety pot 16 functions as described above, and it is possible to prevent the negative pressure from being broken and the drain from being mixed into the analyzer. However, when the negative pressure gradually rises, the drain removed by the cooler 14 enters the drain discharge pipe 18, and the drain is added to the amount of drain in the water sealing inner cylinder 22, and the safety pot 16. As a result, the water sealing inner cylinder 22 does not conduct to the atmosphere, and the negative pressure cannot be broken. As a result, there is a disadvantage that the drain is mixed from the safety pot 16 into the analyzer.
In view of the above, an object of the present invention is to make it possible to break a negative pressure even when the negative pressure gradually increases, and to prevent a drain from being mixed into an analyzer.
[0007]
[Means for Solving the Problems]
The present invention relates to a cooler provided in an introduction line for introducing a measurement gas of a line to an analyzer, and a drain separation device for receiving a drain separated by the cooler in an airtight safety pot and discharging it to the drain pot. The drain discharge pipe that receives the water in the safety pot and discharges it to the drain pot receives the drain that flows out of the cooler at the upper part of the safety pot at the upper end of the drain discharge pipe, and the lower end of the drain discharge pipe is opened to the atmosphere. It is immersed in the drain of the drain pot, and the upper end of the newly provided water-sealed break pipe is provided at the lower part of the safety pot, and the lower end of the water-sealed break pipe is provided for the water sealing provided in the drain pot. It is open to the atmosphere through a certain amount of drain on the inner pipe, and the drain discharge pipe in the safety pot Capacity of the receptacle and water sealing safety pots determined by the distance between the upper end of the break pipe is set to be larger than a certain amount of water seal in pipe in the drain pot.
[0008]
In addition to the drain discharge pipe from the safety pot to the drain pot, a water-sealed break pipe is provided, so even if the negative pressure in the measurement gas introduction line gradually increases, the drain separated by the cooler during that time is drain discharge pipe Therefore, the drain amount during the period in which the negative pressure is rising is not added to the fixed amount of drainage in the water sealing inner pipe. Therefore, when a certain amount of the water sealing inner pipe is sucked into the safety pot, it is possible to prevent the negative pressure of the measurement gas introduction line from being broken and the drain from being mixed into the analyzer.
[0009]
【Example】
FIG. 2 represents an embodiment. The same reference numerals are used for the same parts as in FIG.
A measurement gas such as flue gas is in a state of saturation humidity of about 250 ° C., for example, and is introduced by an introduction pipe 2 to a drain separator 4 having a filter 5 and in an airtight state at room temperature. In the drain separator 4, dewed moisture is removed when the temperature of the measurement gas decreases from about 250 ° C. to room temperature, and solids are also removed by the filter 5. The water removed by the drain separator 4 is discharged to the drain pot 8 by the first drain discharge pipe 6. In the drain pot 8, a discharge port 10 is provided at a predetermined height from the bottom, and the excess drain is discharged. A certain amount of drain 12 is stored in the drain pot 8, and the lower end of the drain discharge pipe 6 is immersed in the drain 12.
[0010]
The upper end of the drain separator 4 is led to a cooler 14 maintained at about 5 ° C. The drain cooled by the cooler 14 and separated from the measurement gas is received by the safety pot 16a. The second drain discharge pipe 18a for receiving the drain in the safety pot 16a and discharging it to the drain pot 8 is provided with a receiving port 20 for receiving the drain flowing out from the cooler 14 at the upper end in the safety pot 16a. The lower end of the discharge pipe 18a is immersed in the drain 12 of the drain pot 10 opened to the atmosphere.
[0011]
A lower end of the safety pot 16 a is provided with an upper end of a newly provided water-sealed break pipe 30, and a lower end of the water-sealed break pipe 30 is a certain amount of the water-sealing inner pipe 22 a provided in the drain pot 8. Open to the atmosphere via drain.
[0012]
The capacity Q2 of the safety pot determined by the distance between the receiving port 20 of the drain discharge pipe 18a and the upper end of the water seal break pipe 30 in the safety pot 16a is larger than a certain amount Q1 of the water seal inner pipe 22a in the drain pot 8. It is set large.
[0013]
The operation of the embodiment of FIG. 2 will be described.
The drain separated by the drain separator 4 and the drain separated by the cooler 14 enter the drain pot 8 and are discharged from the discharge port 10.
The upstream side of the pump 26, that is, the measurement gas introduction line is in a negative pressure state, and the drain discharge pipes 6, 18a and the water seal break pipe 30 are sucked up to a height corresponding to the negative pressure.
[0014]
When the negative pressure of the measurement gas introduction line rises, the drain of the water sealing inner pipe 22a is sucked up from the water sealing break pipe 30 to the safety pot 16a. Since Q1 <Q2 is set, the negative pressure is broken when all the drains in the water sealing inner pipe 22a are sucked into the safety pot 16a. As a result, it is avoided that the drain is sucked into the analyzer by the pump 26.
[0015]
Even if the negative pressure gradually rises, the drain in the cooler 14 generated in the meantime is discharged to the drain pot 8 through the drain discharge pipe 18a, so that it is not added to the drain of the water sealing inner pipe 22a. The negative pressure is broken when all the drains in the water sealing inner pipe 22a are sucked into the safety pot 16a. This is because the water-sealed break pipe 30 is provided separately from the drain discharge pipe 18a.
[0016]
【The invention's effect】
In the present invention, separately from the drain discharge pipe from the safety pot to the drain pot, a water-sealed break pipe that is opened to the atmosphere through a certain amount of drain of the water sealing inner pipe provided in the drain pot at the lower end. Since the capacity of the safety pot is set to be larger than a certain amount of the water sealing inner pipe in the drain pot, the drain separated by the cooler during that time even if the negative pressure of the measurement gas introduction line gradually increases It is discharged to the drain pot through the drain discharge pipe, and the amount of drain during the period when the negative pressure is rising is not added to the amount of drain in a certain amount of the water seal inner pipe. When a certain amount is sucked into the safety pot, the negative pressure of the measurement gas introduction line is broken, and it is possible to prevent the drain from being mixed into the analyzer.
[Brief description of the drawings]
FIG. 1 is a flow chart showing a conventional drain separation device.
FIG. 2 is a flow chart showing a drain separation device of one embodiment.
[Explanation of symbols]
2 Measurement gas introduction pipe 4 Drain separator 8 Drain pot 14 Cooler 16a Safety pot 18a Drain discharge pipe 20 Drain discharge pipe receptacle 22a Water seal inner pipe 30 Water seal break pipe

Claims (1)

In the cooler provided in the introduction line for introducing the measurement gas of the flue gas into the analyzer, and the drain separation device for receiving the drain separated by the cooler in an airtight safety pot and discharging it to the drain pot,
The drain that flows out of the cooler at the upper part in the safety pot is received by the receiving port at the upper end of the drain discharge pipe, and the lower end of the drain discharge pipe is immersed in the drain of the drain pot that is open to the atmosphere,
The upper end of a water-sealed break pipe provided separately from the drain discharge pipe is arranged in the lower part of the safety pot, and a certain amount of the water-sealing inner pipe provided at the lower end of the water-sealed break pipe in the drain pot Is open to the atmosphere through the drain of
The capacity of the safety pot determined by the distance between the drain discharge pipe receptacle and the top end of the water seal break pipe in the safety pot is set to be larger than a certain amount of the water seal pipe in the drain pot. Drain separation device characterized.

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