JP3172231U - Steam waste heat recovery system - Google Patents

Abstract

[PROBLEMS] To use the used waste steam used for heating to heat the water supplied to the steam generator to save energy, and to have a simple and inexpensive structure, which can be easily applied to an existing steam generator. The present invention provides a steam waste heat recovery device that can be installed. A steam discharge pipe 8 for discharging used waste steam 16 discharged from a steam kettle 5 is connected to a bottom side of a heat recovery tank 11, a water supply pipe 2 is connected to the upper side, and heat is supplied. A heat exchange pipe 13 that is spirally wound and connected to the water supply pipe 2 is provided on the inner upper side of the recovery tank 11, and the lower end of the pipe 13 is connected to the hot water storage tank 14, and the hot water discharge pipe is connected to the hot water storage tank 14. 15 is connected to a water level adjusting tank 17, and hot water 20 from the water level adjusting tank 17 is supplied to the boiler 1. [Selection] Figure 1

Description

The present invention relates to an apparatus for recovering waste heat from used waste steam discharged from a steam pot.

In general, in mushroom cultivation, a plastic bag or container filled with oga is sterilized by placing it in a steam kettle, then inoculated with mushrooms, and then the cultivation bag or container is A method of cultivating mushrooms while maintaining the temperature is being carried out.

For example, as shown in FIG. 4, an apparatus for heat-sterilizing a cultivation bag filled with this oga supplies cold water from a water supply pipe 2 to a boiler 1 that generates high-pressure steam via a pump 3. Here, heating is performed to generate high-temperature and high-pressure steam, and this steam is supplied from the steam supply pipe 4 to the steam kettle 5. A method is used in which a shelf 7 on which cultivation bags 6 filled with oga are placed is installed inside the steam kettle 5, and the cultivation bags 6 are heated by steam supplied from the steam supply pipe 4 to heat and sterilize the inner oga. It has been. As this heating method, for example, steam is continuously supplied until the temperature of the oga reaches about 90 ° C., and thereafter, the steam is intermittently sent to raise the temperature of the oga for a total of about 8 hours. Sterilized by heating.

However, since the used waste steam used for the heat sterilization of the oga is discharged as it is from the steam external discharge pipe 12 to the outside, the waste heat has not been used.

The present invention improves the above problem, uses the used waste steam used for heating, heats the water supplied to the steam generator to save energy, has a simple structure and is inexpensive, A steam waste heat recovery device that can be easily installed in a steam generator is provided.

A steam waste heat recovery device according to claim 1 of the present invention is connected to a steam generator and a steam kettle that heats the steam generated here by using steam through a steam supply pipe. A heat recovery tank is arranged between the heat recovery tank and a steam discharge pipe for discharging used waste steam discharged from the top of the steam pot is connected to the bottom side of the heat recovery tank. A water supply pipe is connected to the upper part of the tank, and an external steam discharge pipe for discharging steam to the outside is provided at the upper part of the heat recovery tank, and connected to the water supply pipe on the inner upper part of the heat recovery tank and spirally wound. The lower end of this pipe is connected to a hot water storage tank provided in the lower part inside the heat recovery tank, and this hot water storage tank is connected to a water level adjustment tank via a hot water discharge pipe. Supply hot water to the steam generator And it is characterized in Rukoto.

The steam waste heat recovery apparatus according to claim 2 of the present invention is provided with a burner heating type steam generator provided with a steam generation water tank at the bottom of a steam pot that uses steam to heat, and heat recovery is performed outside the steam pot. Place a tank and connect a steam discharge pipe that discharges used waste steam discharged from the top of the steam kettle to the bottom side of the heat recovery tank and a water supply pipe to the top side of the heat recovery tank A steam external discharge pipe for discharging steam to the outside at the top of the heat recovery tank, and a heat exchange pipe wound in a spiral connected to the water supply pipe at the top inside the heat recovery tank. Is connected to a hot water storage tank provided in the lower part of the inside of the heat recovery tank, a hot water discharge pipe is connected to the hot water storage tank, and this hot water discharge pipe is connected to a water level adjusting valve provided in the steam generating tank. The hot water inside is supplied to the steam generation tank And it is characterized in Rukoto.

According to the steam waste heat recovery apparatus according to claim 1 of the present invention, the steam generator and the steam generated here are connected to the steam kettle heated by using steam through the steam supply pipe, By arranging a heat recovery tank between the steam generator and the steam kettle, the water supplied to the steam generator such as a boiler is exchanged with the used waste steam discharged from the steam kettle to make hot water. As a result, the fuel consumption of the steam generator can be greatly reduced. Moreover, since steam is generated by supplying high-temperature hot water to the steam generator, the operation time is shortened, the applied load is reduced, and the life can be extended.

Moreover, the device of the present invention is simple in structure and inexpensive, and can be easily installed in an existing steam generator simply by changing the piping. In addition, because waste heat is recovered through the used waste steam, there is no problem of clogging or corrosion of the heat exchange pipe due to soot and fine particles, unlike the device for recovering heat from combustion waste gas, and it is stably discarded over a long period of time. Heat recovery is possible.

Further, according to the steam waste heat recovery device of claim 2, when the hot water in the steam generating water tank is evaporated and consumed by being attached to the steam pot provided with the burner heating type steam generator, it is discharged from the steam pot. Since heat is exchanged with the used waste steam to produce hot water and then supplied to the steam generation tank, fuel consumption can be greatly reduced.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG. 1 and FIG. In FIG. 1, reference numeral 10 denotes a steam waste heat recovery apparatus, which is provided between a steam pot 5 for heating and sterilizing the inner bag by heating the cultivation bag 6 with steam and a boiler 1 for generating steam. Yes.

As shown in FIG. 2, the structure of the steam waste heat recovery apparatus 10 is configured such that a steam exhaust pipe 8 that discharges used waste steam 16 discharged from a steam pot 5 that is heated using steam is connected to a heat recovery tank 11. Connect to the bottom side. A water supply pipe 2 is connected to the upper side of the heat recovery tank 11 and a steam external discharge pipe 12 for discharging the steam to the outside is provided. The heat recovery tank 11 is connected to the water supply pipe 2 on the inner upper side of the heat recovery tank 11 and spirally formed. A heat exchange pipe 13 wound around is provided. The lower end of the heat exchange pipe 13 is connected to a hot water storage tank 14 provided at the inner bottom of the heat recovery tank 11.

Further, a hot water discharge pipe 15 for discharging hot water from the hot water storage tank 14 is connected to a water level adjustment tank 17 provided outside the heat recovery tank 11. The water level adjusting tank 17 adjusts the water level by means of a ball tap 18, supplies this hot water 20 to the boiler 1 from the pump 3 shown in FIG. 1, and heats it to generate high-temperature and high-pressure steam.

First, as shown in FIG. 1, the steam waste heat recovery apparatus having the above configuration creates a cultivation bag 6 stuffed with oga, puts it on a shelf 7 attached with casters, carries it into the steam pot 5 and opens the door. Close and seal the inside. Next, the boiler 1 using heavy oil or the like as a fuel is operated. At the start of the operation, water passes from the water supply pipe 2 through the heat exchange pipe 13 of the steam waste heat recovery device 10, passes through the hot water storage tank 14 provided in the lower part thereof, and is stored in the water level adjustment tank 17. To supply to the boiler 1 boiler.

When the boiler 1 is operated and high-temperature and high-pressure steam is generated, it is sent from the steam supply pipe 4 to the steam kettle 5 and sprayed from the bottom, and the cultivation bag 6 filled with the oga in the steam kettle 5 is heated and sterilized. To do. As shown in FIG. 2, the waste steam 16 whose temperature has been lowered after the heating has flowed from the lower part of the heat recovery tank 11 of the steam waste heat recovery apparatus 10 through the steam discharge pipe 8 attached to the upper part of the steam pot 5. Then, it passes upward and is discharged to the outside from the steam external discharge pipe 12 provided at the top. In the process in which the waste steam 16 rises in the heat recovery tank 11, heat is exchanged with the water in the heat exchange pipe 13 wound in a spiral shape to become hot water 20.

Since water is consumed as the boiler 1 is operated, the pump 3 is intermittently operated to suck water in the water level adjustment tank 17 and supply it to the boiler 1. When the water level in the water level adjustment tank 17 falls, the valve is opened by the ball tap 18 and the hot water 20 in the hot water storage tank 14 is supplied to the water level adjustment tank 17.

When the hot water 20 is thus supplied from the hot water storage tank 14 to the water level adjustment tank 17, water is supplied from the water supply pipe 2 to the heat exchange pipe 13, where heat is exchanged with the waste steam 16 to become hot water 20. . Conventionally, as shown in FIG. 4, water is directly supplied to the boiler 1 from the water supply pipe 2, but by providing the steam waste heat recovery device 10 of the present invention, the waste heat is recovered from the waste steam 16 to warm water. Therefore, the fuel consumption of the boiler 1 can be greatly reduced. According to experiments, it has been confirmed that the temperature of the hot water 20 in the water level adjustment tank 17 reaches about 90 ° C., and supplying this to the boiler 1 can reduce the fuel consumption by 20% or more compared to the conventional apparatus. It was.

Further, since steam is generated by supplying the hot water 20 at a high temperature, the operation time of the boiler 1 is shortened, the load applied to the boiler 1 is reduced, and the life can be extended. The device of the present invention is simple in structure and inexpensive, and can be easily installed between the existing boiler 1 and the steam kettle 5 by simply changing the piping. Also, the steam waste heat recovery apparatus 10 of the present invention recovers waste heat through the waste steam 16, so that there is no problem of clogging or corrosion of the heat exchange pipe due to soot and fine particles, like the apparatus for recovering heat from the combustion waste gas. And stable recovery of waste heat over a long period of time.

FIG. 3 shows another embodiment of the present invention. This steam waste heat recovery apparatus 10 includes a steam discharge pipe 8 for discharging used waste steam 16 discharged from the steam pot 5, and a heat recovery tank 11. Connect to the bottom side. A water supply pipe 2 is connected to the upper side of the heat recovery tank 11 and a steam external discharge pipe 12 for discharging steam to the outside is provided. A heat exchange pipe 13 wound around is provided, and the lower end of the pipe 13 is connected to a hot water storage tank 14. Up to this point, the configuration is the same as in FIG.

The steam cooker 5 is a normal pressure type having a burner heating steam generator 21 at the bottom, a burner 23 is provided in the combustion chamber 22, and a flue 24 communicating with the combustion chamber 22 is connected to the steam generating water tank 25. The flue 24 is connected to the exhaust pipe 9. A hot water discharge pipe 15 is led from the hot water storage tank 14 of the steam waste heat recovery apparatus 10 to the upper part of the steam generating water tank 25, and a ball tap 18 is provided at the tip thereof.

In the steam waste heat recovery apparatus having the above-described configuration, the cultivation bag 6 filled with the saw is placed on the shelf 7 and carried into the steam pot 5 to close the door and to seal the inside. Next, when the burner 23 of the combustion chamber 22 is ignited, the combustion flame passes through the flue 24 and is discharged from the exhaust pipe 9. However, since the flue 24 is immersed in the steam generation water tank 25, the water is heated. This becomes steam and rises in the steam pot 5 and is discharged from the steam discharge pipe 8. The waste steam 16 that has passed through the steam discharge pipe 8 is guided into the heat recovery tank 11 of the steam waste heat recovery apparatus 10, and exchanges heat with water in the heat exchange pipe 13 connected to the water supply pipe 2 while ascending here. The hot water 20 is then stored in the hot water storage tank 14.

As the burner heating steam generator 21 is operated, the hot water 20 in the steam generating water tank 25 is evaporated and consumed. Therefore, the ball tap 18 is intermittently operated, and the hot water 20 in the hot water storage tank 14 is discharged into the hot water discharge pipe. Water is supplied from 15 to the steam generation tank 25.

When the hot water 20 is thus supplied from the hot water storage tank 14 to the steam generating water tank 25, water is supplied to the heat exchange pipe 13 from the water supply pipe 2, where heat exchange with the waste steam 16 is performed again, and the hot water 20 Become. Conventionally, water is directly supplied to the steam generating water tank 25. However, by providing the steam waste heat recovery device 10 of the present invention, the waste heat is recovered from the waste steam 16 and supplied as hot water 20, so that the fuel Consumption can be greatly reduced.

In addition, although the said description demonstrated the case where it utilized for the heat sterilization of the cultivation bag 6 of mushroom cultivation, you may heat-sterilize the cultivation container which filled the plastic container with the oga. Moreover, the steam waste heat recovery device of the present invention is not limited to mushroom cultivation, and can be widely used as long as it is a device that generates waste steam from a steam pot.

It is sectional drawing which provided the steam waste heat recovery apparatus between the boiler and steam boiler by one Embodiment of this invention. It is sectional drawing which expands and shows the steam waste heat recovery apparatus of FIG. It is sectional drawing which shows the state which attached the steam waste heat recovery apparatus to the atmospheric pressure steam kettle which provided the burner heating steam generator in the bottom part by other embodiment of this invention. It is sectional drawing which shows the steam cooker connected to the conventional boiler.

1 boiler
2 Water supply pipe
3 Pump
4 Steam supply pipe
5 Steam pot
6 Cultivation bags filled with oga
7 shelves
8 Steam exhaust pipe
10 Steam waste heat recovery equipment
11 Heat recovery tank
12 Steam external discharge pipe
13 Heat exchange pipe
14 Hot water storage tank
15 Hot water discharge pipe
16 Waste steam
17 Water level adjustment tank
18 ball tap
20 Hot water
21 Burner heating steam generator
22 Combustion chamber
23 Burner
24 Flue
25 Steam generation tank

Claims (2)

The steam generator and the steam generated here are connected via a steam supply pipe to a steam kettle that uses steam to heat, and a heat recovery tank is disposed between the steam generator and the steam kettle, A steam discharge pipe for discharging used waste steam discharged from the upper part of the steam kettle is connected to the bottom side of the heat recovery tank, a water supply pipe is connected to the upper side of the heat recovery tank, and the heat recovery tank A steam external discharge pipe that discharges steam to the outside is provided at the top of the heat recovery tank, and a heat exchange pipe wound in a spiral is connected to the water supply pipe at the top inside the heat recovery tank, and the lower end of this pipe is heat recovered Steam connected to a hot water storage tank provided at the inner bottom of the tank, connected to a water level adjustment tank via a hot water discharge pipe to the hot water storage tank, and supplied with hot water from the water level adjustment tank to the steam generator Waste heat recovery device. A burner heating type steam generator with a steam generation water tank is installed at the bottom of the steam kettle that heats using steam, a heat recovery tank is placed outside the steam kettle, and the used exhausted from the top of the steam kettle A steam discharge pipe for discharging the waste steam is connected to the bottom side of the heat recovery tank, a water supply pipe is connected to the upper side of the heat recovery tank, and steam is discharged to the top of the heat recovery tank. An external discharge pipe is provided, and a heat exchange pipe spirally wound connected to the water supply pipe is provided on the inner upper part of the heat recovery tank. A hot water discharge pipe is connected to the hot water storage tank, and the hot water discharge pipe is connected to a water level adjusting valve provided in the steam generating water tank to supply hot water in the hot water storage tank to the steam generating water tank. Steam waste heat recovery device.