JPH01196404A - Steam transporting and heating device - Google Patents

Abstract

PURPOSE:To enable air contained in a feed water tank to be completely discharged each time one run of operation is finished, by a method wherein water and residual air in the feed water tank are completely discharged by once opening an equalizing ON-OFF valve prior to extinguishment of a burner, and the valve is closed after the extinguishment. CONSTITUTION:A steam introducing pipe 13 extended from a steam generating drum 1 is connected to a feed water tank 4 through an equalizing ON-OFF valve 12. When water contained in a water storage tank 10 is brought to a predetermined temperature by additional heating due to continuation of an operation, the condition is detected by a temperature sensor 17, and the equalizing ON-OFF valve 12 is opened through a controlling part 18. Then, steam is introduced into the tank 4, and air remaining in the tank 4 is swept away with water to the side of the drum 1. After the lapse of a predetermined period of time, the controlling part 18 operates to close a valve 8 and to extinguish a burner 7. After the lapse of a predetermined period of time from the extinguishment of the burner 7, the controlling part 18 closes the valve 12.

Description

Detailed Description of the Invention <Industrial Application Field> The present invention relates to a steam conveying and heating device that continuously conveys high-temperature steam generated in a steam generation can by heating with a burner and heats water with the steam. .

<Prior Art> An example of a conventional device will be explained using FIG. The hot water is mixed with the hot water and sent out from the discharge port 2C to the pipe line 3. 4 is a water supply tank, and water in the water supply tank 4 is supplied to the steam generating can 1 through a water supply pipe 5. A water return pipe 6 is connected to the water supply tank 4 by branching from the middle of the pipe 3, so that water is replenished when the water in the water supply tank 4 decreases.

<Problems to be Solved by the Invention> However, in the above-mentioned conventional device, since air is contained in the flowing water discharged from the ejector 2, the water containing the air passes through the return pipe 6 and is replenished into the water supply tank 4. As a result,
There is a drawback that air accumulates in the water supply tank 4.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a steam conveying and heating device in which the air in the water tank 4 is purged every time one operation is completed so that air does not accumulate in the water tank 4. do.

<Means for Solving the Problems> The steam conveying and heating device of the present invention includes a steam generating can that is continuously heated by a burner, a water supply tank for supplying water to the steam generating can, and a steam generating can that is heated continuously by a burner. a pressure equalizing valve for controlling the opening and closing of the introduction of steam generated in the steam generating can into the water supply tank; and a pressure equalizing valve that controls the opening and closing of the introduction of steam generated in the steam generating can into the water supply tank; It has an ejector that mixes and exchanges heat and discharges hot water into a water storage tank such as a bathtub, and a water return pipe that is branched from the middle of a pipe from the discharge port of the ejector to the water storage tank and connected to the water supply tank. In the steam conveying and heating device, when the burner is extinguished, the pressure equalizing on-off valve is once opened to wipe out water and residual air in the water supply tank before extinguishing the burner, and after the extinguishing, the pressure equalizing on-off valve is closed. It is characterized by being configured to do so.

By opening the pressure equalization valve before extinguishing the burner, steam from the steam generation can is introduced into the water supply tank, and the water and accumulated air in the water tank are transferred to the steam generation can. It is cleaned out and the inside of the water tank is temporarily replaced by steam. By closing the pressure equalization valve after extinguishing the fire, the steam in the water tank is cooled and condensed, creating a negative pressure in the water tank, and water is sucked into the water tank from the return pipe. At this time, water containing air is no longer being discharged from the ejector, and water from the water tank is sucked into the water supply tank through the return pipe. Therefore, the water tank is filled with water that does not contain air. Therefore, the next operation can be started again in good condition.

<Example> FIG. 1 is an overall configuration diagram of the implementation device, and FIG. 2 is a control flowchart of the operation in the implementation device.

Water in the steam generating can 1 is heated by a burner 7. 8
is the fuel supply valve for burner 7. High-temperature steam generated within the can body 1 is blown into the ejector 2 from the inlet 2a through the steam conveying pipe 9. A negative pressure section is formed in the ejector 2 by blowing this steam, and water from a water storage tank 10 such as a bathtub is sucked through the water pipe 11 from the negative pressure suction section 2b. The sucked water is mixed with steam, heated, and discharged from the discharge port 2c to the pipe line 3, and introduced into the water storage tank 10. Water tank 10
If it is a bathtub, additional heating is required.

A pressure equalizing on/off valve 1 is connected from the steam generation can 1 to the water supply tank 4.
A steam introduction pipe 13 is connected via 2. 14.1
5 is a check valve. Further, 16.17 is a temperature sensor.

Reference numeral 18 denotes a control unit that controls the operation of each part of the device, which inputs, for example, commands from an operation unit (not shown) and information from temperature sensors 16 and 17, and outputs commands to open and close the fuel supply valve 8 and the pressure equalization valve 12. .

In the present invention, before a command to extinguish the burner 7 is issued from the control unit 18, the pressure equalizing valve 12 is once opened, steam is introduced into the water supply tank 4, and the water and accumulated air in the water supply tank 4 are supplied to the water supply tank 4. Sweep through tube 5 into can body 1. After the burner 7 is extinguished, the equalizing pressure on/off valve 12 is closed.

Now, when the operation start switch of the operation section (not shown) is turned on, the control section 18 opens the valve 8 and the burner 7 starts combustion (Flow A). The steam generated in the steam generation can body 1 is sent into the ejector 2 through the steam transfer pipe 9, mixed with water sucked from the negative pressure suction part 2b, and the water is turned into hot water and discharged into the pipe line 3. be done. During operation, when the water in the steam generating can 1 decreases below a certain water level, the temperature sensor 16 detects this and the pressure equalizing valve 12 is opened via the control section 18. When the equalizing pressure on/off valve 12 is opened, steam is introduced into the water supply tank 4, and as a result, the pressure in the water tank 4 becomes the same level as the pressure in the steam generation can 1.
Water inside the steam generating can body 1 is fed by gravity through a water supply pipe 5. When the water supply ends, the equalizing pressure on/off valve 12 is closed. As a result, the inside of the water tank 4 is cooled and becomes negative pressure.
Water is sucked into the water supply tank 4 through the water return pipe 6 to perform water replenishment. In this case, water replenishment will be performed using hot water discharged from the ejector 2. In this way, steam is continuously generated and transported to continue operation.

Then, as the operation continues, the water in the water tank 10 such as the bathtub is reheated, and when this is completed and a certain set temperature is reached (
Flow B), the temperature sensor 17 detects this, and the pressure equalizing valve 12 is first opened via the control unit 18 (Flow C). Then, the steam is introduced into the water supply tank 4, and the water and accumulated air in the water supply tank 4 are swept away toward the steam generation can body 1 side. When the predetermined time required for this cleaning has elapsed (Flow D), the control unit 18 closes the valve 8 and extinguishes the burner 7 (Flow E). The predetermined time from opening of the pressure equalizing valve 12 to extinguishing the burner 7 can be, for example, one minute. When a predetermined period of time has passed after the burner 7 is extinguished (flow F), the control unit 18 controls the pressure equalizing valve 1
2 is closed (flow G). This predetermined time can be, for example, 20 seconds after extinguishing the fire. Of course, the time required for the pressure-equalizing on-off valve 12 to stop closing may be determined from the time when the pressure-equalizing on-off valve 12 is opened.

When the burner 7 is extinguished, steam is no longer naturally transported to the ejector 2 side, and water suction from the water pipe 11 to the ejector 2 is also stopped. Therefore, water discharging from the ejector 2 is also stopped. Therefore, when the pressure equalization valve 12 is closed after extinguishing the fire, the inside of the water tank 4 becomes negative pressure due to cooling, and water that does not contain air flows from the water tank 10 through the pipe 3 and the return pipe 6 into the water tank 4. Suction and water replenishment.

In the embodiment, a case was explained in which combustion of the burner was stopped based on information from the temperature sensor 17.
The present invention is not limited to this. For example, when the operation switch is turned off while driving, or in other cases,
In short, the operation of the pressure equalizing valve performed when the combustion of the burner 7 is stopped is a feature of the device of the present invention.

Effect> The present invention has the above-described configuration, and when the burner is extinguished, the pressure equalizing on-off valve is once opened to wipe out the water and residual air in the water tank before extinguishing the burner, and after the extinguishing, the pressure equalizing on-off valve is opened. Since it is configured to be closed, it is possible to refill the water tank to the full with no residual air. Therefore, at the time of the next operation, stable operation can be started in a good condition with the water supply tank full of water.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of the implementation device, and FIG. 2 is a control flowchart of the operation in the implementation device. 1: Steam generation can 2: Ejector 3: Pipe line
4: Water supply tank 6: Water return pipe 7
: Burner 9: Steam conveying pipe 10: Water tank 12: Equal pressure on/off valve 16.17: Temperature sensor 18 2 control section

Claims (1)

[Claims] A steam generating can that is continuously heated by a burner, a water supply tank for supplying water to the steam generating can, and opening/closing control of introduction of the steam generated in the steam generating can to the water supply tank. an equalizing pressure on/off valve; and an ejector that mixes the high temperature steam conveyed and blown from the steam generation can with water sucked from the negative pressure suction section, exchanges heat, and discharges the hot water into a water storage tank such as a bathtub. , a steam conveying heating device having a water return pipe branched from the middle of a pipe from the discharge port of the ejector to the water storage tank and connected to the water supply tank; The steam conveying heating device is characterized in that the equalizing pressure on-off valve is once opened to wipe out water and residual air in the water supply tank, and the equalizing pressure on-off valve is closed after extinguishing the fire.