JPS5835152Y2 - Residual heat recovery and heat storage device in boiling pot - Google Patents

Description

[Detailed description of the invention] The present invention is a boiler that effectively recovers residual heat energy and stores heat by using the indirect heating pipe of the boiling tank, which was conventionally used only for one side of heating, as a heat absorption pipe at the end of the work. The present invention relates to residual heat recovery and heat storage devices in pots.

Conventionally, in boiling pots that use boilers, such as boiling pots for food processing such as boiled noodles, kamaboko, hampen, bonito flakes, and dried sardines, and boiling pots for dyeing, it is necessary to wash the boiling tank after the boiling process is completed. The reality is that the boiling water is directly discharged outside the tank, and when work starts the next morning, fresh water at room temperature is supplied into the boiler and heated in the boiler. It was wasted, and it took an unbearable amount of time to start boiling the next time, which increased fuel consumption, which inevitably led to higher product costs.

The present invention was devised in view of the above-mentioned circumstances, and the boiling tank is equipped with an indirect heating pipe whose starting end is connected to the boiler in a freely openable and closable manner to form a steam flow path. A hot water tank is arranged outside the boiling tank, and the hot water tank and the end side of the indirect heating pipe are connected to each other so as to be openable and closable, and the hot water tank and the starting end of the indirect heating pipe are connected to each other so as to be openable and closable. A hot water supply system in which a heating pipe is used as an endothermic pipe to form a circulation flow path for residual heat recovery water, and the circulation flow path is branched on the upper side than the starting end of the indirect heating pipe so that the tip faces into the boiling tank. By making the bypass channel open and closing freely and configuring each of the channels mentioned above to be selectively opened, it is possible to significantly save fuel and shorten the time required to start boiling work. This makes it possible to reduce product costs, and in addition, the insulated hot water tank, which is integrated into the circulation flow path for residual heat recovery water, can be used as an emergency water tank in the event of a water outage due to an earthquake or other emergency. The present invention aims to provide a residual heat recovery and heat storage device for a boiling pot.

Next, the configuration of the present invention will be described with reference to an embodiment shown in the drawings. Reference numeral 1 denotes a boiling tank that is integrated into an automatic noodle boiling device for boiling fresh udon noodles, for example. 1 is formed into a double wall structure by filling a heat insulating material 1C between the circular vertebrae 1a and the outer frame 1b.

2 is an indirect heating pipe, and the indirect heating pipe 2 is connected to the boiling tank 1.
They are arranged in a meandering manner over almost the entire area on the bottom surface.

The starting end of the indirect heating pipe 2 is connected to a boiler 5 via a connecting pipe 4 having a valve 3, and the distal end thereof is connected to a return pipe 8 provided with a valve 6 and steam 1 to wrap 7. The opening at the tip of the return pipe 8 faces the inside of the boiling tank 1, and these connecting pipes 4, indirect heating pipe 2 and return pipe 8
A heating steam flow path A is formed by the above.

On the other hand, reference numeral 9 denotes a heat-retaining hot water tank disposed outside the boiling tank 1, and the heat-retaining water tank 9 is, for example, filled with a heat insulating material 9C between the circular vertebrae 9a and the outer stile 9b, similar to the boiling tank 1 described above. It has a double-walled structure, and retains the thermal energy of the hot water stored in the hot water tank 9 for a long time, thereby performing a heat storage function.

Reference numeral 10 denotes a connecting pipe that communicates and connects the hot water tank 9 and the distal end of the indirect heating pipe 2. One end of the connecting pipe 10 is connected to the distal end of the indirect heating pipe 2 via a valve 11, and the other end is connected to the distal end of the indirect heating pipe 2. The upper plate 9' of the hot water tank 9 is penetrated to face the inside of the hot water tank 9.

12 is a connecting pipe that communicates and connects the hot water tank 9 and the starting end side of the indirect heating pipe 2, and one end of the connecting pipe 12 is connected to the valve 13.
The other end of the indirect heating pipe 2 is connected to the starting end of the indirect heating pipe 2 through a , indirect heating pipe 2 by heat-insulating hot water tank 9 and each connecting pipe 10, 12, etc.
A circulating flow path B for water for residual heat recovery is formed using the heat absorbing pipe.

Reference numeral 14 denotes a water circulation pump, which is disposed at an appropriate position in the circulation flow path B, for example, on the top plate 9' of the hot water tank 9 as shown in the figure.

C is a hot water supply bypass flow path formed by branching the circulation flow path A above the starting end of the indirect heating pipe 2, and the bypass flow path C is a branch point slightly above the valve 13. The tube 16 extended from the tube 16 to the upper position of the boiling tank 1 via the valve 15 is further bent downward, and the tip thereof is passed through the top plate 1' of the boiling tank 1 to a lower position inside the boiling tank 1. I'm going to face it.

In the figure, 17 and 17a are water supply valves and drain valves provided in the boiling tank 1, and 18 and 18a are water supply valves and drain valves provided in the hot water tank 9.

Although not shown, automatic water level adjustment valves are provided in the boiling tank 1 and the hot water tank 9, respectively, and the water level in each tank 1, 9 is automatically adjusted to a predetermined height by the automatic water level adjustment valve. It is designed to be regulated.

In addition, a cooling tank, a washing tank, etc. are arranged adjacent to the boiling tank 1, and after the raw udon noodles etc. that are transported into the boiling tank via a transfer conveyor are boiled in the boiling tank 1, As before, the noodles are cooled, washed with water, and automatically and continuously discharged as boiled noodles from the end of the transfer.

The structure of the present invention is as described above, but the specific structure of the piping and valves of each flow path, the material and structure of the hot water tank, etc. may be changed as long as they do not contradict the gist of the invention stated in the claims for utility model registration. It goes without saying that the present invention may be modified as appropriate in implementation; for example, it is also possible to automatically control the opening and closing operations of each valve via a solenoid valve or the like.

Next, the operation of the present invention configured in a diagonal manner will be explained.

When starting work now, first of all, the water supply valve 17.18
Open the bottle and add the required amount of room temperature water to the boiling tank 1 and the hot water tank 9,
After storing w', the valves 3 and 6 provided in the heating steam flow path A are opened, and the steam generated in the boiler 5 is sent to the indirect heating pipe 2 via the connecting pipe 4. The water temperature in the boiling tank 1 is heated to a specified temperature, for example, 100°C, and then the boiling operation of raw udon noodles and the subsequent cooling operation are continuously and automatically performed.

During this boiling operation, the valves 11, 13, and 15 provided in the residual heat recovery water circulation flow path B and the hot water supply bypass flow path C are closed to allow water to flow into these flow paths B and C. Of course, this also prevents steam from escaping.

On the other hand, when the above-mentioned boiling operation is completed, the valves 3 and 6 provided in the heating steam flow path A are closed, and then the valves 11 and 13 in the residual heat recovery water circulation flow path B are opened. After plugging, the pump 14 is started to drain the water W' stored in the hot water tank 9.
The connecting pipe 12, the indirect heating pipe 2, the connecting pipe 10, and the heat-retaining water tank 9 are sequentially changed in diameter and circulated repeatedly for a required period of time.

In this circulation process, when the residual heat recovery water moves from the starting end to the end of the indirect heating pipe 2, heat exchange is performed repeatedly using the indirect heating pipe 2 as an endothermic pipe, so that no residual heat remains in the boiling tank 1. The residual heat energy possessed by the waste water at approximately 100°C is sequentially transferred to the water for residual heat recovery, and the temperature of the water is raised until it is almost in equilibrium with the temperature of the waste water due to the repeated heat exchange action. Heat is recovered with almost no waste, and the temperature of the condensing water is raised to a high temperature.

After the water W' stored in the hot water tank 9 is circulated for a required period of time to perform heat exchange as described above, the drive of the pump 14 is stopped and the valves 11 and 13 are closed. The originally room temperature water recovers the residual heat energy of the boiling water in the boiling tank 1, changes to a high temperature state, and retains its heat in that state.

After the heat exchange is completed, the drain valve 17a is opened to discharge the waste water from the boiling tank 1 to the outside of the tank 1, and the inside of the boiling tank 1 is of course washed.

When starting the next boiling operation, the valve 15 provided in the bypass flow path C is opened and the pump 14 is driven to supply the hot water stored and retained in the hot water tank 9 to the boiling tank 1 as required. After supplying the amount, the drive of the pump 14 is stopped and the valve 14 is closed, and then the boiler 5 is turned off in the same manner as described above.
In this case, the water stored in the boiling tank 1 is not room-temperature water but high-temperature water stored in the hot water tank 9, so the steam from the boiler is The combustion time can be significantly shortened and the start time of the boiling operation can therefore be significantly accelerated.

After the hot water in the hot water tank 9 has been supplied to the boiling tank 1 as described above, the water in the hot water tank 9 can be filled by opening the water supply valve 18 and supplying water again into the hot water tank 9. Since a predetermined amount of water is always held, the hot water tank 9 can be used as an emergency water tank.

In short, the present invention is configured as described above, and uses the indirect heating pipe of the boiling tank as a heat absorption pipe at the end of the work to circulate water for residual heat recovery through the circulation flow path formed between the boiling tank and the hot water tank. By repeatedly circulating the hot water in the boiling tank, the residual heat energy of the hot water in the boiling tank can be effectively recovered with almost no waste, and the recovered residual heat energy can be stored and retained in the hot water tank for reuse. In addition to significantly reducing fuel costs, it also significantly shortens the time required to start boiling, reducing product costs, and meeting the demands of the energy-saving era. In the event of a water outage due to an earthquake or other emergency,
It can be used as an emergency water tank as is, and in addition, it can be easily installed in various conventional boiling pots, providing extremely useful practical effects.

[Brief explanation of drawings]

The drawings show an embodiment of the residual heat recovery and heat storage device for a boiling pot according to the present invention, in which FIG. 1 is a partially cutaway overall perspective view, and FIG. 2 is a cross-sectional plan view. In the figure, 1 is a boiling tank, 2 is an indirect heating pipe, 3 is a valve, 5 is a boiler, 6 is a valve, 7 is a steam trap, 8 is a return pipe,
Reference numeral 9 designates a heat-retaining hot water tank, reference numerals 11, 13, and 15 indicate valves, reference numeral 16 indicates a bypass channel, and B indicates a circulation channel for residual heat recovery water.

Claims (1)

[Scope of utility model registration request] The boiling tank is equipped with an indirect heating pipe whose starting end is connected to the boiler in a freely openable and closable manner to form a steam flow path, and a heat-retaining water tank is installed outside the boiling tank, and the heat-retaining water tank and the indirect heating pipe are connected to the boiler. The distal end of the heating pipe is freely openable and closable, and the insulating hot water tank and the starting end of the indirect heating pipe are freely openable and closable to form a circulating flow path for water for residual heat recovery using the indirect heating pipe as a heat absorbing pipe. Intimidate,
A bypass flow path for hot water supply, which is branched above the starting end of the indirect heating pipe of the circulation flow path and whose tip faces the boiling tank, is configured to be freely openable and closable, and each of the above flow paths can be selectively operated. 1. A residual heat recovery and heat storage device for a boiling pot, characterized in that it is configured to be able to be opened at any time.