JP2008241534A - Air-cooled cooler for high-temperature water and high-temperature water analyzer using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent cooling water from being leaked due to a folded cooling water hose, and also to prevent a burn injury due to a shortage of the cooling water. <P>SOLUTION: An air-cooling cooler for the high-temperature water is substituted for a conventional water-cooling fan, and employs an air-cooling cooler including a coiled metal tube and an air-cooling fan. The air-cooling cooler for the high-temperature water and an analyzer for the high-temperature water using it are provided. The dangerous high-temperature water is simply, easily and safely cooled. If an automatic analyzer is coupled to the downstream, the water quality is automatically analyzed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an air-cooled cooler for high temperature water and an analyzer for high temperature water using the same. More specifically, the present invention relates to an air-cooled cooler for high-temperature water that can safely sample and cool high-temperature water such as boiler water without using cooling water, and an analytical instrument for high-temperature water using the same.

  Many industrial boilers are operating in the industry. In order to operate these boilers safely and stably, it is stipulated in the JIS standard that the water quality of the boiler water is kept within a predetermined range. For this reason, in order to monitor the quality of the boiler water, the boiler water is directly sampled from the boiler as sample water and automatically analyzed by various analyzers or manually analyzed.

Sampling is performed by drawing boiler water in a high-temperature and high-pressure state from a blow pipe or a sampling inner pipe as a sampling point, reducing the pressure to a constant pressure and temperature, and cooling the boiler water to a desired analytical instrument. The analysis items are usually pH, conductivity, hydrazine, silica, chloride ions and the like. Such boiler water sampling is defined in JIS B 8224. According to FIG. 4.1 of the JIS, sample water from the boiler is collected and then supplied to a water-cooled cooler to be cooled.
JIS B 8224, p. 5

  However, if a water-cooled cooler as described above is used, it is necessary to use a large amount of cooling water, and if there is no permanent heat exchanger, the routing of the cooling water becomes very long. There were problems such as leakage of cooling water due to bending and risk of burns due to insufficient cooling water.

  The present invention has been developed for the purpose of solving such problems.

  In the present invention, a metal tube having a high-temperature water inlet and an outlet is disposed in a container provided with an opening at one end and a cooling fan at the other end. An air-cooled cooler for high-temperature water in which water is cooled to a predetermined temperature by a gas supplied by the fan.

  The present invention is also an air-cooled cooler for high-temperature water in which a high-temperature water outlet provided with a flow rate control valve and a high-temperature water inlet of the tube of the high-temperature water-air cooled cooler are connected.

  Furthermore, the present invention is a high-temperature water analyzer in which the tube outlet of the high-temperature water-air cooled cooler is connected to a water quality analyzer.

  In such a high-temperature water analyzer, the analyzer is an apparatus for measuring at least one selected from the group consisting of pH, ORP (oxidation-reduction potential), electrical conductivity, chloride ion, Na ion and K ion. is there.

  According to the first aspect of the present invention, high-temperature water such as boiler water can be cooled safely and without the need for cooling water. Therefore, in any factory, it is possible to cool the high-temperature water to an appropriate temperature without requiring the handling of the cooling water and without considering the disposal of the waste water.

  According to the second aspect of the present invention, when the flow rate of the target high-temperature water and the cooling temperature of the cooler cannot be balanced, the flow rate control valve adjusts the amount of high-temperature water so that it is cooled to an appropriate temperature. be able to.

  According to the third aspect of the present invention, since the tube outlet of the high-temperature water-air cooled cooler and the analytical instrument are directly connected, the quality of the cooled high-temperature water (sample water) is automatically or manually determined. Can be analyzed.

  Examples of such analysis items include pH, ORP, electrical conductivity, Na ion, K ion, or chloride ion. In addition, it does not necessarily need to be automatic, and when analyzing manually, hydrazine, a sulfite ion, a silica density | concentration, etc. can be mentioned as an analysis item in addition to the above.

  Thus, according to the present invention, it is possible to safely take out high-temperature water with a high risk to the human body, cool high-temperature water to an appropriate temperature without the need for cooling water, and if necessary, pH, ORP, electrical conductivity, chloride ion, Na ion, K ion, etc. can be automatically analyzed as they are.

  Hereinafter, an embodiment of an air-cooled cooler for high-temperature water and an analytical apparatus for high-temperature water using the same according to the present invention will be described in detail with reference to FIG. 1 taking boiler water as an example of target high-temperature water.

  In FIG. 1, 1 is a boiler water outlet, 2 is a flow control valve, 5 is a container having an opening at the top and a cooling fan 4 at the bottom, 3 is a metal tube, 6 is a thermometer, 10 is An electric conductivity measuring device including an electrode type electric conductivity meter 7, 11 is a pH measuring device including an electrode type pH meter 8, 12 is a recorder, 13 is an arithmetic unit, and 9 is a drainage tank.

  A boiler apparatus (not shown) is usually provided with a blow pipe and a sampling inner pipe as sampling points. In this invention, the boiler water which is high temperature water is extract | collected from such a point. Sampling frequency shall be whenever analysis is required. The amount collected is also required for analysis.

  The collected boiler water passes through the boiler water outlet 1 and is adjusted by the flow rate control valve 2 so that the flow rate of the high-temperature water after cooling becomes a desired temperature and the metal tube 3 in the container 5 is adjusted. It is sent to the hot water inlet. Although not shown, a simple filter may be provided at the boiler outlet 1 in accordance with the quality of the boiler water (particularly suspended matter).

  The container 5 may be made of metal or synthetic resin.

  The metal tube 3 is preferably made of SUS in order to avoid blockage due to corrosion, but other materials such as copper and brass can also be used. In order to increase the heat exchange rate with gas, for example, air, this tube is preferably a single-tube coil shape, but may be a zigzag shape or a rectangular shape. Moreover, it is good also as a system which provides a header in a high temperature water inlet part, and divides it into several straight tubular tubes.

  The tube diameter in the case of a single tube coil does not cause blockage due to iron sludge that may be contained in the boiler water, and in order to ensure a residence time in the tube for sufficiently cooling high temperature water, for example, In a boiler having a pressure of about 0.7 MPa, the inner diameter is 0.8 to 4 mm, preferably about 1.0 to 2.0 mm.

  Similarly, the tube length varies depending on the boiler pressure, but is usually 1 to 20 m, preferably about 5 to 10 m.

  The outside of such a metal tube may be straight, but may be provided with convex protrusions such as fins. The latter tube is preferable because the heat exchange rate is improved.

  As an air cooling fan, a fan with an air volume of about 0.1 to 2 m <3> / m is suitable, for example, a DC fan (manufactured by Sanyo Denki Co., Ltd.).

  The gas used for cooling usually uses air, but in some cases, an inert gas such as nitrogen gas may be used.

  The temperature of the cooled high-temperature water (sample water) discharged from the outlet is measured with the electrode thermometer 6 and the flow rate control valve 2 is adjusted via the arithmetic unit 13 based on the measured value, thereby the high-temperature water. Supply amount and the air volume of the air cooling fan 4 are calculated by the calculation device 13 and output adjustment signals, respectively, so that the hot water can be brought to a desired temperature. Usually, such a temperature is set to 40 ° C. or less, preferably 30 ° C. or less, which is a temperature that hardly affects the analytical instrument.

  In the present invention, the high-temperature water (sample water) thus cooled may be once received in a water tank and supplied to an automatic analyzer in a separate place, or manual analysis may be performed as it is. In the example, the cooled sample water is supplied to an electric conductivity meter 10 including an electrode type electric conductivity meter 7 and a pH meter 11 including an electrode type pH meter 8 to measure each water quality. The sample water after the measurement is stored in the drain tank 9. On the other hand, the data obtained by the water quality analysis is recorded in the recorder 12 and sent to the calculation device 13 for calculation to send the control signal.

  By connecting in this way, it is possible to easily and safely perform analysis of high-temperature water with danger.

  Although the sample water after the analysis has been described as being received by the drainage tank, depending on the amount of the sample water, the sample water can be directly returned to the replenishing water tank or the like without providing the drainage tank.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to the following examples unless it exceeds the gist.

  The test was performed using the apparatus shown in FIG. The target boiler was a small special boiler, the container was made of synthetic resin, the metal tube was made of SUS, and an internal diameter of 1.0 mm and a length of 5 m was used.

  The air cooling fan (DC fan) was operated so that the air flow was 0.5 m3 / m, the flow rate control valve was fully opened and the outside air temperature was 25 ° C. As a result, the sample temperature was 40 ° C. Thereafter, the solution was passed through a pH meter and an electric conductivity meter, and the pH and electric conductivity were easily measured without affecting the meter.

  Thus, it was possible to cool and analyze hot water simply and safely.

It is a figure which shows the apparatus which concerns on the Example of this invention.

Claims (4)

  A metal tube having a high temperature water inlet and an outlet is provided in a container having an opening at one end and a cooling fan at the other end, and the high temperature water in the tube is supplied by the fan. An air-cooled type cooler for high-temperature water, wherein the air-cooled type cooler is cooled to a predetermined temperature by the gas.   2. The air-cooled cooler for high-temperature water according to claim 1, wherein a high-temperature water outlet provided with a flow rate control valve and a high-temperature water inlet of the tube of the high-temperature water-air cooled cooler are connected. .   The high-temperature water analyzer according to claim 2, wherein the tube outlet of the high-temperature water-air cooled cooler is connected to a water quality analyzer.   4. The analysis for high temperature water according to claim 3, wherein the analytical instrument is an apparatus for measuring at least one selected from the group consisting of pH, ORP, electrical conductivity, chloride ion, Na ion and K ion. apparatus.

Images