JPH0639206Y2 - Inflow hardness detection device such as boiler - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] In the present invention, in a soft water use system such as a boiler that uses soft water from which hardness components such as calcium and magnesium have been removed, the amount of the hardness component that has flowed into the system. The present invention relates to an inflow hardness detecting device for detecting

[Technical background of the invention]

In recent years, as the size and efficiency of boilers have become smaller, soft water management has become more important. When entering the boiler can, hardness components such as calcium and magnesium in the raw water in the system using soft water adhere to the heat transfer surface as scales, significantly hindering heat transfer, and causing local overheating phenomenon to cause the can body. A situation occurs that damages the. Therefore,
Usually, the hardness is removed by a water softener and the softened water is supplied to the boiler. However, if the soft water is not managed diligently, the hardness will flow in and cause the above-mentioned trouble. As a soft water management method, a method in which a hardness indicator is dropped into a small amount of extracted water and the degree of discoloration is confirmed by the eyes of a manager is widely used because of its simplicity. However, since this method is manually performed by humans, it is apt to be forgotten, and there is a problem that it is not possible to clearly know how much the hardness amount erroneously inflowed due to an unexpected situation.

[Means for solving problems]

The present invention is intended to solve the above problems and ensure soft water management to maintain boiler efficiency. Specifically, the water supply line in a soft water use system such as a boiler (1) ( A hardness detecting sensor (3) is inserted in 2), and integrating means (5) for integrating the hardness inflow amount into the soft water using system from the signal from this sensor and the operating time of the water supply pump (4). It is characterized by the provision of.

〔Example〕

A preferred embodiment of the present invention will be described below with reference to the drawings.

In the figure, (1) is a boiler, (6) is a burner installed above the can body, (7) is a water level detector for detecting the water level in the can, and a fuel supply line (8) is provided in the burner. The water supply lines (2) are connected to the bottoms of the cans. A fuel pump (9) and a fuel control solenoid valve (10) are inserted into the fuel supply line (8), while the water supply line (2) is inserted.
A water softener (11), a water supply tank (12), a water supply strainer (13), a hardness detection sensor (3), a water supply pump (4) and a check valve (14) are inserted therein.

Reference numeral (15) is an operation control device for the boiler, which turns on / off the water supply pump (4) according to a signal from the water level detector (7) or a fuel control solenoid valve (10) according to a pressure detection signal inside the can. Control to open and close. (5) is a hardness amount inflow amount integrating means, which is configured to integrate the inflow amount from the output signal of the hardness amount detection sensor (3) and the operating time of the water supply pump (4). Further, (16) shows a main steam valve, and (17) shows a blow valve.

As a concrete method for detecting the hardness inflow, the total hardness inflow [g] is integrated from the water supply flow rate (water supply time) at a concentration equal to or higher than a set value (for example, 300 ppm or more), or a concentration equal to or higher than the set value. Use a method that integrates the water supply time [hours] (for example, 3 ppm or more). Then, it is desirable to compare the preset upper limit value and issue an alarm when the upper limit value is reached, and forcibly stop the operation of the boiler by applying an interlock. Investigate the cause and try to repair it.

[Effect of device]

Since the present invention is configured as described above, it is possible to accurately manage soft water, maintain boiler efficiency for a long time, and prevent damage to the can body due to scale adhesion. You will never forget to manage soft water, and if the boiler is stopped by interlocking with the output signal from the integrating means, the scale will not adhere anymore, so the thermal stress on the can body due to the scale adhesion will surely increase. Therefore, it is possible to obtain a large practical effect in preventing scale puncture.

[Brief description of drawings]

 The drawing is a system diagram showing an embodiment of the present invention. (1) ... Boiler, (2) ... Water supply line (3) ... Hardness detection sensor (4) ... Water supply pump, (5) ... Integrating means (6) ... Burner, (7) ... Water level detector (8) ... Fuel supply line, (9) ... Fuel pump (10) ... Fuel control solenoid valve, (11) ... Water softener (12) ... Water supply tank, (13) ... Water supply strainer (14) ... Check valve, (15) … Operation control device (16)… Main steam valve, (17)… Blow valve

Claims (1)

[Scope of utility model registration request] 1. A hardness detection sensor (3) is inserted into a water supply line (2) of a soft water use system such as a boiler (1), and from the signal from this sensor and the operating time of a water supply pump (4), An inflow hardness detecting device for a boiler or the like, which is provided with an integrating means (5) for integrating an inflow amount of hardness into the system using soft water.