JPS612038A - Sample collecting device - Google Patents

Abstract

PURPOSE:To elevate the responsiveness of an analyzing gage in the plant starting and to enable an early time measurement having reliability by connecting a water supply system between a sample feeding system and sample analyzing system and by flowing water to the analyzing gage at the time of a plant stoppage. CONSTITUTION:The sample feeding system consisting of a sample collecting means 10 and sample cooling means 12 is connected to the sample analyzing system consisting of a flowmeter FI, thermometer TI (thermostat 28, if necessary) and analyzing gage X via a valve 16. The water supply system consisting of a water supply route 18 and supply valve (including a solenoid valve 20) is then connected to the side of the sample feeding system of the valve 16. The main valve 22 and flushing valve 24 of the sample collecting means 10 are constituted by an automatic valve (opened and closed by solenoid valve 26). Water is then flowed to the analyzing gage X on the stoppage of the plant and the condition of the motion operable at any time is maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a sample collection device, and more particularly to a sample collection device for improving the responsiveness of analytical instruments during plant start-up.

[Prior art and its problems]

In recent years, the operation of thermal power plants has been reduced to midnight shutdowns (DSS) due to the rise of nuclear power plants and from the perspective of energy conservation.
) and weekend stoppages (WSS), and as a result of the need to shorten start-up times, the burden placed on workers is increasing both in quality and quantity. Therefore, to address these issues, reliable measurements using analytical instruments are essential early on during start-up. In order to solve these problems, the present invention enables early measurement at the initial stage of startup by allowing pure water or dummy water to flow through the instruments when the plant is stopped, thereby keeping the instruments in a state in which they are always operational. sample collection device.

Conventionally, the sample collection device shown in the attached Figure 2 has been used, which consists of a sample collection means 10, a sample cooling means 12 and a pressure reducing device 14 as required (not shown in Figure 2(b)). A sample supply system consisting of a flowmeter Fl, a thermometer TI, a constant temperature device if necessary (not shown in Figure 2 (b)), and an analysis instrument X is connected to a sample analyzer with a valve 16. configured to connect via. That is,
The sample introduced from each plant system by the sample collection means 10 is cooled by the sample cooling means 1 as appropriate depending on its temperature and pressure.
2 and a pressure reducing device 14, and then introduced into each analytical instrument X.

According to the conventional sample collection device configured in this way, the sample is not introduced into the instrument when the plant is stopped, which results in problems with early measurements when the plant is restarted, or puts a burden on the workers. . This is because the cell part of the instrument is not immersed in the sample or is stagnant in the sample, so the sample begins to flow in at startup.

It takes time for the readings from the instruments to stabilize, and to prevent this, workers should remove the cells from the analytical instruments when the plant is shut down and immerse them in pure water.
This is because it takes time and effort to attach the cell to the analytical instrument again at startup.

[Purpose of the invention]

It is therefore an object of the present invention to provide a sample collection system which improves the responsiveness of analytical instruments during plant start-up, which eliminates the above-mentioned drawbacks in conventional sampling devices and allows reliable early measurements of analytical instruments during plant start-up. We are in the process of providing equipment.

[Key points of the invention]

According to the present invention, in the configuration of the sample collection device of the prior art, a water supply path is provided between the sample supply system and the sample analysis system and on the sample supply system side of the valve that connects them. In addition to connecting the water supply system consisting of valves, the main valve of the sampling means and the flushing valve are configured with automatic valves, and when the plant is stopped, water is flowed to the analytical instrument to maintain it in a constantly operable state. This is achieved by

Any water that does not adversely affect the analytical instruments can be used as the water that flows through the analytical instruments when the plant is shut down, such as pure water, water from other units, dummy water, or preconditioned sample water.

Furthermore, it is preferable that at least one of the supply valves in the water supply system be an automatic valve, and that the automatic valve in the sample supply means be an air-operated valve that is opened and closed by switching the solenoid valve of the air line.

[Embodiments of the invention]

Hereinafter, the present invention will be explained with reference to the attached FIG. 1 with reference to examples, but the present invention is not limited thereto.

As shown in FIG. 1, the sample collection device according to the present invention comprises a sample collection means 10, a sample cooling means 12 as required, and a pressure reducing device (not arranged in the system on the right side of FIG. 1) for supplying a sample. The system is connected via a valve 16 to a sample analysis system consisting of a flow meter Fl, a temperature needle TI, a constant temperature device 28 (not installed in the system on the right side of Fig. 1) if necessary, and an analysis instrument X. is the same as the conventional device, but further includes a valve 16 between the sample supply system and the sample analysis system.
A water supply system consisting of a water supply path 18 and a supply valve (one of which is a solenoid valve 20) is connected to the sample supply system side of the sample collection means 10, and a main valve 22 and a flushing valve 24 of the sample collection means 10.
and are configured with automatic valves (opened and closed by a solenoid valve 26), which allows water to flow into the analytical instrument X when the plant is stopped, thereby maintaining it in a state in which it is always operable. In this way, when the plant is started up, good responsiveness of the analytical instruments can be obtained and early measurements can be made.

Any water that does not have an adverse effect on the flowmeter Fl, temperature needle TI, and analysis instrument X, such as pure water, dummy water, or water from another unit, is used as the water that flows through the water supply path to the analytical instrument. .

According to the sample collecting apparatus of the present invention having the above configuration, the water supply solenoid valve 20 opens at the same time as the sample source valve 22 closes in response to a plant stop signal, and water flows into the analytical instrument X.

Conversely, when starting up the plant, the flushing valve 24 first opens in response to the start signal to perform flushing for a certain period of time, and then, at the same time as the water supply solenoid valve 20 closes, the sample source valve 2
2 opens to introduce the sample. In this way, after the sample and the water remaining in the pipe (the pipe is thin and short, only a small amount of water remains) are replaced, and measurements using the regular sample are immediately performed. In order to operate the main valve 22, which serves as an automatic valve for introducing the sample at startup, it can be opened and closed by switching the solenoid valve 26 of the air line.

In this way, by configuring the water supply valve with the solenoid valve 20 and configuring the main valve 22 and the flushing valve 24 of the sample collection means with automatic open/close valves, the water supply and sample can be controlled by the respective signals when the plant is stopped and restarted. Switching between supplies can be done automatically to keep the analytical instrument ready for operation at all times.

[Effects of the Invention] According to the above configuration of the present invention, even when the plant is stopped, water is constantly flowed into the analytical instrument to maintain the instrument in an operable state at all times. Measurements can be made, and trends in sample (water quality) at plant start-up can be grasped at an early stage, making it possible to shorten start-up time.

Furthermore, except for daily management of instrument maintenance, plant shutdown/
Since no processing is required for the analytical instrument other than the start-up operation, the burden on the operator for the analytical instrument for early measurement is significantly reduced.

Although the present invention has been described above with reference to preferred embodiments, the present invention is not limited thereto, and various modifications may be made within the spirit and scope of the present invention, such as controlling the opening and closing of an automatic valve by any operating valve other than an air-operated valve. It will be appreciated by those skilled in the art that design changes may be made.

[Brief explanation of the drawing]

FIG. 1 is a schematic system diagram of a sample collecting device according to the present invention, and FIG. 2 is a schematic system diagram of a conventional sample collecting device. 10... Sample collection means 12... Sample cooling means 14...
Pressure reducing device 16... Valve 18... Water supply path 20... Solenoid valve 22... Main valve 24... Flushing valve 26... Solenoid valve
28... Constant temperature device A... Air W... Water

Claims (3)

[Claims] (1) A sample supply system consisting of a sample collection means and, if necessary, a sample cooling means and a pressure reduction means, is connected via a valve to a sample analysis system consisting of a flow meter, a thermometer, a constant temperature device, and an analytical instrument. In the sample collection device, a water supply system consisting of a water supply path and a supply valve is connected between the sample supply system and the sample analysis system and on the sample supply system side of the valve, and a source of the sample collection means is connected to the sample supply system side of the valve. The valve and flushing valve are configured with automatic valves,
A sample collection device that improves the responsiveness of analytical instruments when the plant is started up, characterized in that water is flowed through the analytical instruments when the plant is stopped so that the instruments are always operable. (2) The apparatus according to claim 1, wherein the water is selected from the group consisting of pure water, water from another unit, dummy water, and preconditioned sample water. (3) The device according to claim 1, wherein at least one of the supply valves in the water supply system is an automatic valve, and the automatic valve is an air-operated valve or a solenoid valve that is opened and closed by switching a solenoid valve in an air line. .