JPH05296860A - Measuring apparatus for consumed calory of device using steam - Google Patents

Abstract

PURPOSE:To measure the correct consuming calory in a device using steam even when the supplied steam is a saturated steam or a superheated steam. CONSTITUTION:A steam feed pipe 10 is connected to a device 1 using steam. The steam feed pipe 10 is provided with a steam flowmeter 3, a steam pressure sensor 8 and a steam temperature sensor 9. A condensate discharge pipe 20 is connected at the secondary side of the device 1, and a condensate flowmeter 21 and a steam trap 7 are set in the discharge pipe 20. A condensate temperature sensor 5 is mounted to the condensate flowmeter 21. The steam flowmeter 3, pressure sensor 8, temperature sensors 5, 9 and condensate flowmeter 21 are connected to an operating part 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a calorie consumption measuring apparatus for steam-using equipment for performing various heat treatments such as heating and drying using steam. In equipment using steam, the latent heat of the steam is used to heat the object to be heat-treated, but the amount of steam supplied is preferably the minimum necessary from the viewpoint of energy saving.

[0002]

2. Description of the Related Art As a conventional calorific value measuring device for a steam-using device, a device as disclosed in, for example, JP-A-62-246700 has been used. This is because a condensate flow meter that measures the amount of condensate discharged from steam-using equipment is installed on the outlet side of the steam-using equipment, and condensate temperature detection means that detects the temperature of this condensate is installed, and the supply steam The steam pressure detecting means for detecting the pressure is attached to calculate and display the amount of heat consumed by the steam-using device from the amount and temperature of condensed water and the pressure of steam.

[0003]

SUMMARY OF THE INVENTION In the above conventional one,
When the supply steam is saturated steam, the consumed heat amount can be accurately measured, but there is a problem that the consumed heat amount cannot be accurately measured in the case of steam other than saturated steam, for example, superheated steam. This is because the detected amount of the supply steam is only the steam pressure, and the stored heat quantity of the steam is converted from this pressure assuming that the supply steam is the saturated steam. The steam supplied to the steam-using equipment is often the high-pressure steam generated in a normal steam boiler, which is appropriately decompressed according to the specifications of the equipment used. Does not decrease, so it easily becomes superheated steam. The amount of heat of superheated steam is determined by its pressure and temperature, and it is not possible to convert the exact amount of steam heat only by the pressure.

Therefore, a technical problem of the present invention is to obtain a calorie consumption measuring apparatus for steam-using equipment capable of accurately measuring the calorie consumption of steam-using equipment even if the supply steam is not only saturated steam but also superheated steam. is there.

[0005]

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problem is to connect a steam supply pipe for supplying steam to a steam using device and supply the steam supply pipe to the steam supply pipe. A steam flow rate detection unit that measures the amount of steam is attached, a steam pressure temperature detection unit that detects the pressure and temperature of the supply steam is installed, and a condensate temperature detection unit that detects the temperature of the condensate discharged from the equipment using steam is installed. Arranged, a calculation unit for calculating the amount of heat consumed in the steam-using device is provided by signals from the steam flow rate detection means, the steam pressure temperature detection means, and the condensate temperature detection means.

[0006]

The operation of the above technical means is as follows.
By arranging the steam flow rate detecting means and the steam pressure temperature detecting means, the amount of heat supplied to the equipment using steam is calculated. That is, the amount of heat supplied can be calculated from the steam flow rate, pressure, and temperature regardless of whether the supplied steam is saturated steam or superheated steam. Further, the condensate temperature detecting means detects the temperature of the condensate discharged from the steam-using device, and calculates the exhaust heat amount discharged as condensate without being consumed in the steam-using device. That is, the condensate is only in the liquid phase, and the retained heat of the condensate can be calculated by detecting its temperature. Therefore, if the exhaust heat amount is subtracted from the supplied heat amount, the consumed heat amount in the steam using device can be calculated.

[0007]

EXAMPLE An example showing a concrete example of the above technical means will be described (see FIG. 1). A steam supply pipe 10 for supplying steam is connected to the steam using device 1, and the steam supply pipe 10 is sequentially connected to the steam supply pipe 10.
Steam flowmeter 3 as steam flow rate detecting means, and pressure sensor-8 and temperature sensor-9 as steam pressure temperature detecting means
Install. A condensate discharge pipe 20 for discharging condensate generated in the steam using device 1 is connected to the secondary side of the steam using device 1, and a condensate flow meter 21 and a condensate temperature for detecting the temperature of the condensate are connected. A steam trap 7 that attaches a temperature sensor 5 as a detecting means and automatically discharges the condensate that has flowed down.
Install. The condensate flow meter 21 is not necessarily required if there is no leakage of steam or condensate in the steam using device 1.
Further, the steam trap 7 is not always necessary if the amount of condensed water generated in the steam using device 1 is constant. The steam flow meter 3, the pressure sensor-8, the temperature sensors-5, 9 and the condensate flow meter 21 are connected to the computing unit 6, respectively.

The steam flow meter 3 may be of any known type, but an orifice type or Karman vortex type flow meter is suitable. Similarly, as the pressure sensor-8, the temperature sensors-5, 9 and the like, conventionally known ones can be used. An ultrasonic type or electromagnetic type flowmeter is suitable for the condensate flowmeter 21.

On the primary side of the flow meter 3 of the steam supply pipe 10, there is provided a pressure reducing valve 11 for decompressing the supply steam, a separator 22 for separating the steam in the steam supply pipe 10 from the condensate, and a separator. A steam trap 23 for discharging the condensed water separated into 22 out of the system is provided. Further, a supply pipe 12 for supplying an object to be heat-treated is connected to the steam-using device 1 via a valve 14, and a take-out pipe 13 for taking out the object to be heat-treated is also connected.

Next, the operation will be described. The object to be heated is latently heated by the steam supplied from the steam supply pipe 10 and taken out from the object to be heated take-out pipe 13. The amount of steam supplied is measured by the steam flow meter 3. The steam deprived of the heat by the latent heating is condensed to be discharged from the steam trap 7 through the condensed water flow meter 21 attached to the secondary side of the steam using apparatus 1. The respective signals from the steam flow meter 3, the pressure sensor 8 and the temperature sensors 9 and 5 are input to the arithmetic unit 6. The calculation unit 6 calculates the heat quantity of the steam supplied to the steam using apparatus 1 from the steam flow rate, the steam pressure and the temperature, calculates the discharge heat quantity discharged as condensed water from the condensate temperature, and uses the steam from the difference between the two. The heat consumption amount in the device 1 is calculated.
In this case, the exhaust heat amount can be calculated more accurately by multiplying the condensate amount detected by the condensate flow meter 21 by the condensate temperature.

[0011]

As described above, according to the present invention, whether the steam supplied to the steam using device is saturated steam or superheated steam, the amount of heat consumed by the steam using device is accurately measured. can do.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a device for measuring heat consumption of steam-using equipment according to the present invention.

[Explanation of symbols]

 1 Steam-using equipment 3 Steam flow meter 5 Condensate temperature sensor-6 Calculation unit 8 Steam pressure sensor-9 Steam temperature sensor-10 Steam supply pipe 11 Pressure reducing valve 21 Condensate flow meter

Claims (1)

[Claims] 1. A steam pressure pipe for connecting a steam supply pipe for supplying steam to a device using steam, and mounting steam flow rate detecting means for measuring the amount of supplied steam on the steam supply pipe to detect the pressure and temperature of the supplied steam. A condensate temperature detecting means is arranged to detect the temperature of the condensate discharged from the equipment using steam, and a signal from the steam flow rate detecting means, the steam pressure temperature detecting means and the condensate temperature detecting means is arranged. A device for measuring the amount of heat consumed by steam-using equipment, which is equipped with a calculation unit that calculates the amount of heat consumed by equipment using steam.