KR20130046012A - Boiler for cooking of food - Google Patents

Abstract

PURPOSE: A superheated steam boiler for cooking food is provided to facilitate to control a calorific value and the gas consumption of the burner, cooking temperature per food, steam temperature, and the amount of steam and to reduce maintenance costs. CONSTITUTION: A superheated steam boiler for cooking food comprises a water reservoir(10), a water pipe(20), a steam pipe(30), and a burner(40). An outer wall(11) and an inner wall(12) are joined to be integrated so that water reservoir is formed. The inner wall is formed into a protuberant shape between the lateral and upper sides of the outer wall by being spaced at a predetermined distance. Water supplied from outside is filled between the outer and inner walls. Steam generated by the heated water is filled in the water reservoir. The water pipe formed in the one side of the inner wall is communicated with the water reservoir so that the water flows into the inside and the water is heated. The steam pipe formed in the one side of the inner wall is communicated with the water reservoir so that the steam filled in the water reservoir flows into the inside and the steam is converted into superheated steam. The burner heats the water pipe and the steam pipe respectively and independently.

Description

[0001] Boiler for Cooking of Food [0002]

The present invention relates to a superheated steam boiler for cooking food, and more particularly, to a boiler for generating superheated steam at a high temperature capable of cooking food.

Generally, a boiler is a device that generates steam having high temperature and pressure by transferring combustion heat of fuel to water. Such a boiler is used to supply steam to a steam engine such as a thermal power plant or a ship, or to work or heating devices of various factories. Moreover, boilers are divided into several types in structure. Among them, once-through boilers, which correspond to forced circulation boilers, are pipe-only boilers made by bending water pipes and long pipes. It is a type of boiler that feeds water at the end, pumps it, and heats, evaporates, and overheats it in the middle, and sends superheated steam from the other end of the pipe. Perfusion boilers are suitable for the generation of high pressure steam, and especially in the case of supercritical pressure boilers.

Superheated Vapor is a high-heated steam that heats steam generated in a boiler without changing the pressure. When the liquid is heated with a constant pressure, the temperature rises, and when it reaches a certain temperature, it begins to evaporate. In this case, the temperature does not change until the whole is evaporated even if it is heated again, and the liquid and vapor coexist. This is referred to as wet saturated steam, and all that has become steam is referred to as dry saturated steam. When the dry saturated steam is heated again, the temperature of the steam rises, which is called superheated steam. By using this steam, the efficiency of a boiler, an engine, a turbine, etc. can be improved. Furthermore, superheated steam is a hot, colorless, transparent gas of 100 ° C. or higher produced by heating the steam generated by boiling water without applying pressure. Heat transfer by air is limited to convective heat, but superheated steam is highly effective in cooking food due to high heat efficiency by radiating heat and condensation heat. In the case of convective heat transfer, the heat transfer rate of superheated steam is about 10 times faster than that of heated air. In particular, by heat treatment in a low oxygen state, oxidation and combustion of the heated object can be suppressed. In addition, a general superheater produces a steam of 183.3 ° C. under a pressurized pressure of 10 kg / cm 3 G, and typically produces a steam of 170 ° C. at 7-8 kg / cm 3 G. On the other hand, in order to produce low-pressure superheated steam, there is a method of directly heating the first heated steam with a burner or indirectly heating the heat storage material using a heater and an electromagnetic induction heating method.

High temperature superheated steam is useful for food industry, drying industry or environmental industry. That is, it can be mainly used for cooking, drying, concentration, sterilization, sterilization of food, drying of animal waste such as sewage sludge, animal manure, food waste, sewage sludge, pigs and cattle.

Conventionally, a boiler for generating superheated steam for cooking various foods uses a single burner, so it is not easy to control the calorie of the burner. That is, when a single burner generates steam, and the generated steam is secondarily heated to generate superheated steam at a time, by adjusting the valve of the burner to reduce gas consumption, the amount of steam is increased and the temperature is lowered. There is a problem that the steam temperature is too high to be suitable for cooking food. Furthermore, since the water tube and the secondary heating tube, which conventionally generate steam, are simultaneously influenced by the burner, the gas consumption amount can not be controlled. Even if the gas consumption amount is controlled, the temperature and the steam amount fluctuate, resulting in a problem that adversely affects food cooking. In addition, the conventional superheated steam boiler is formed by cutting and welding the water tube and the secondary heat pipe in a straight shape so that the water tank and the secondary heat pipe are cracked during the expansion and contraction according to the temperature, There has been a problem that the cost of maintaining and repairing the boiler has been increased and the reliability of the boiler has been lowered.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to enable control of steam amount, temperature and gas consumption amount according to the cooking temperature of food, thereby enabling various foods to be cooked.

Another object of the present invention is to prevent cracking due to shrinkage and expansion of water pipes and steam pipes in the boiler, to easily replace the boiler due to aging, and to reduce maintenance and repair costs.

In order to achieve the above object, the present invention provides a superheated steam boiler for cooking food, comprising: an outer wall having a space of a certain volume formed therein; and an inner wall integrally coupled to the outer wall, wherein the inner wall has a predetermined distance A water tank formed between the outer wall and the inner wall so as to be filled with water supplied from the outside and filled with steam generated from the heated water; A water tube communicating with the water tank at one side of the inner wall to allow the water in the water tank to enter and exit and to heat the filled water; A steam pipe communicating with the water tank at the one side of the inner wall to receive the steam filled in the water tank, the steam introduced into the superheated steam, and the burner independently heating the water pipe and the steam pipe.

In the present invention, a water supply pipe communicating with one side of the outer wall of the water tank to supply water to the inside of the water tank, a water level sensing part provided in communication with one side of the outer wall of the water tank to sense the water level inside the water tank, And a drain pipe connected to the deposition unit and discharging water stored in the water tank. The open / close valve installed on the water supply pipe is opened / closed by sensing the water level of the water level sensing unit And an opening / closing valve for opening / closing the drain pipe may be installed in the drain pipe.

In the present invention, one or more water pipes may be installed in a linear shape so that one end thereof is closed and the other end thereof is in communication with the inner wall.

Further, in the present invention, the water tube may be coil-shaped, and both ends may be connected to the inner wall.

Further, in the present invention, the water pipe may be semicircular, the upper part may be straight, and the lower part may be circular arc.

Further, in the present invention, the steam pipe may be coil-shaped, and the inlet through which the steam is introduced may communicate with the inner wall, and the outlet through which the steam may flow may be installed through the water tank.

Also, in the present invention, the steam pipe may be a double coil type, and the inlet through which the steam is introduced may communicate with the inner wall and the outlet through which the steam may flow may be installed through the water tank.

Further, in the present invention, the steam pipe may have a semicircular shape, and the upper portion may be straight and the lower portion may be circular arc.

Further, in the present invention, a gas supply pipe is connected to the burner, and a burner for heating a water pipe for heating the water pipe and a burner for heating the steam pipe for heating the steam pipe are integrally or separately provided, A first supply pipe connected by a burner for burning water and a second supply pipe connected by a burner for heating the steam pipe; and a control valve for controlling the amount of gas supplied to the first supply pipe and the second supply pipe, respectively.

In the present invention, a gas supply pipe is connected to the burner, and a gas pipe for heating a water pipe and a pipe for heating a steam pipe are integrally or separately provided in the gas supply pipe, A damper adjusting member for relatively adjusting the amount of gas supplied to the burner and the burner for heating the steam pipe is provided, and the amount of gas supplied to the gas supply pipe through the gas supply pipe can be adjusted.

In the present invention, the water pipes and the steam pipe ends communicating with the inner wall are welded to each other by welding or separated, and the water pipes and steam pipes are connected to each other. And a gasket can be coupled to the fixing member, respectively.

Further, in the present invention, the outer wall surface may be provided with a heat insulating material for heat insulation, and the case may be provided on the outer surface of the heat insulating material.

The present invention is characterized in that a water pipe for boiling water and a steam pipe for reheating steam and a burner for heating the water pipe and the steam pipe are respectively constituted to control the amount of heat and gas consumption of the burner and to control the temperature of the food by cooking temperature, And it is possible to prevent cracking or breakage of the boiler, to reduce the maintenance and repair cost of the boiler, and to improve the reliability of the boiler.

1 is a perspective view showing a first embodiment of a superheated steam boiler for cooking food according to the present invention.
2 is a sectional view showing a first embodiment of a superheated steam boiler for cooking food according to the present invention.
3 is a cross-sectional view showing a superheated steam boiler for cooking food according to a second embodiment of the present invention.
4 is a sectional view showing a third embodiment of the superheated steam boiler for cooking food according to the present invention.
5 is a perspective view showing a water tube and / or a steam pipe according to the present invention.
6 is a cross-sectional view illustrating a joint portion of a water pipe and a steam pipe according to the present invention.
7 is a perspective view showing the configuration of the integrated burner according to the present invention.
8 is a perspective view showing a configuration of a stand-alone burner according to the present invention.
FIG. 9 is a diagram illustrating the gas control of a burner according to the present invention in a damper fashion.

Hereinafter, an embodiment of a superheated steam boiler for food cooking according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 1, the superheated steam boiler for cooking food generates steam by heating the supplied water with fuel such as gas, and secondarily heats the generated steam to convert it into super heated steam and discharge it. The superheated steam discharged from the boiler is used for various kinds of food cooking.

2, the superheated steam boiler for cooking food is provided with a water tank 10 in which water supplied from outside is stored and steam generated by heating water is filled. The inner wall 12 is integrally coupled to the inside of the outer wall 11. The outer wall 11 is formed with a predetermined volume of space. The inner wall 12 is formed in a protruded shape with a certain distance between the side of the outer wall 11 and the upper part. Between the outer wall 11 and the inner wall 12, water supplied from the outside and steam generated from heating of water It is filled. That is, the water tank 10 is provided with an inner wall 12 at a predetermined interval from the inner central portion to the upper portion of the outer wall 11, and a space in which water and steam can be filled between the outer wall 11 and the inner wall 12 is formed.

The water tank 10 is connected to a water supply pipe 17 communicating with one side of the outer wall 11 and supplying water into the water tank. The water supply pipe 17 is connected to the lower portion of the inner wall 12 and the water supply pipe 17 is provided with an on-off valve 18 for opening and closing the water supply. And a water level sensing unit 16 installed in communication with one side of the outer wall 11 of the water tank 10 to sense the water level inside the water tank. The water level sensing unit 16 senses the water level of the water to be filled in the water tank 10 and includes a sensor for sensing the water level. One or more sensors may be mounted to sense the amount of water being filled in the water bath 10. [ Furthermore, the level information sensed by the water level sensing unit 16 is converted into an electrical signal so that the on / off valve 18 can be opened and closed. That is, the detection signal of the level detector 16 is inputted to a controller (not shown) so that the controller can control the opening and closing of the valve 18. The on-off valve 18 is preferably an electronically controlled valve. A deposit portion 13 is formed on the bottom surface between the outer wall 11 and the inner wall 12 of the water tank 10 to collect sediments generated in the water tank. The depositing portion 13 formed on the bottom surface of the inner wall 12 may be formed at the lowest position, or may be formed lower than the inner wall 12. A drain pipe (14) for discharging the water stored in the water tank (10) is connected to the deposition unit (13). The water pipe 14 is provided with an on-off valve 15 so that the water stored in the water tub 10 is discharged through the opening and closing valve 15. At this time, as the water is discharged, sediments accumulated in the deposit portion 13 are discharged together. The precipitate may include calcium sulfate, calcium bicarbonate, magnesium bicarbonate, magnesium chloride, magnesium sulfate, silica or a fat or the like, which is dissolved in water or scales removed from a water pipe or a steam pipe. The sediment deposited in the sedimentation section 13 may be mixed with the superheated steam and included in the food being cooked, so that the sediment deposited in the sedimentation section 13 should be discharged periodically.

The water tube 20 communicates with the water tank at one side of the inner wall 12 of the water tank 10, and the water in the water tank is taken in and out, and the filled water is heated. The water pipe 20 is linearly closed at one end, and the other end is connected to the inner wall 12 to allow water to flow in and out. One or more water tubes 20 are installed on the inner wall 12. A plurality of water pipes 20 can be formed in the front and rear direction on the inner wall 12 and a plurality of water pipes 20 can be formed on the inner wall 12 in the up and down and front and back directions A plurality of water tubes 20 may be formed.

In Fig. 3, the water tube 21 is coil-shaped and both ends can be connected to the inner wall 12. This allows the water tube 21 to be heated up. Further, the length or diameter of the water tube 21 can be determined depending on the capacity of the boiler.

5, in the case where the water tube 21 is of a coil type, the water tube 21 may have a semicircular shape, and the upper portion may be a straight line and the lower portion may have an arc shape. This allows the water tube 21 to be heated up.

The steam pipe 30 communicates with the water tank at one side of the inner wall 12 of the water tank 10 to introduce the steam filled in the water tank and the introduced steam is converted into superheated steam by the heat applied from the burner 40. The steam pipe 30 has a coil shape and an inlet 30a through which the steam is introduced is communicated with the inner wall 12 of the water tub 10 and an outlet 30b through which the steam flows is installed through the water tub 10. That is, the inlet of the steam pipe 30 communicates with the upper portion of the steam-filled inner wall 12, and the outlet of the steam pipe 30 passes through the inner wall 12 and the outer wall 11 and is connected to a supply pipe through which superheated steam is supplied. The coil-shaped steam pipe (30) can increase the heating area. Further, the length or diameter of the steam pipe 30 can be determined depending on the capacity of the boiler.

4, the steam pipe 31 is of a double coil type, and the inlet 31a through which the steam flows is communicated with the inner wall 12 and the outlet 31b through which the steam flows is installed through the water tub 10 have. In other words, a coiled steam pipe may be formed inside the steam pipe 31 formed in a coil shape. Also, the steam tube 31 having a double coil shape can increase the heating area.

In Fig. 5, the coil-shaped steam tubes 30 and 31 are semicircular, and the upper portion may be straight and the lower portion may be circular. This can be configured to increase the area where the steam tubes 30 and 31 are heated.

7, the burner 40 applies heat to the water tubes 20 and 21 and the steam tubes 30 and 31 independently of each other. The burner 40 may use various fuels for heat generation and use gas for convenience of use. A main gas supply pipe 41 is connected to the burner 40. A gas pipe 46 for heating the water pipes 20 and 21 and a steam pipe heating device for heating the steam pipes 30 and 31 are connected to the gas supply pipe 41, And a burner 47 are integrally provided. In Fig. 8, each of the burners 40 may be provided independently. The single unit type burner has a structure capable of heating the water tubes 20 and 21 and the steam tubes 30 and 31 at the same time. For example, the right side of the burner 40 allows the water tubes 20 and 21 to be heated, and the left side allows the steam tubes 30 and 31 to be heated. Thus, a single burner can heat the water tube, heat the steam tube, or selectively heat both the water tube and the steam tube. In addition, the burner 40 may be constituted by a separate burner that can heat the water pipe and the steam pipe, respectively.

A gas supply pipe 41 connected to the burner 40 is provided with a first supply pipe 42 connected by a water heater burner 46 and a second supply pipe 44 connected by a burner 47 for heating the steam pipe, The first supply pipe 42 and the second supply pipe 44 are provided with control valves 43 and 45 for controlling the amount of gas to be supplied. The amount of gas supplied to the water heater burner 46 can be adjusted by the control valve 43 of the first supply pipe 42 branched to the gas supply pipe 41 and the control valve 45 of the second supply pipe 44 The amount of gas supplied to the burner 47 for heating the steam pipe can be adjusted.

9, the burner 40 may be provided with a damper adjusting member 49 for relatively adjusting the amount of gas supplied to the burner 46 for heating the water pipe and the burner 47 for heating the steam pipe. The damper adjusting member 49 is connected to the gas supply pipe 41 through a gas supply pipe to a first supply pipe 42 connected to the water pipe heating burner 46 and a second supply pipe 44 connected to the steam pipe heating burner 47 The amount of gas supplied to the water pipe heating burner 46 and the steam pipe heating burner 47 can be relatively controlled by adjusting the amount of gas to be controlled by the control knob (not shown).

The water tubes 20 and 21 communicating with the inner wall 12 of the water tank 10 and the ends of the steam tubes 30 and 31 are welded or joined to each other. An inspection plate 50 and a gasket 51 which can be opened and closed on the outer wall 11 corresponding to the end portion of the inner wall 12 to which the water tubes 20 and 21 and the steam tubes 30 and 31 are joined, Respectively. The gasket 51 is for preventing leakage of water stored in the water tank 10 or steam generated in the water tank, and a Teflon material can be applied.

A case 26 is coupled to the outside of the outer wall 11 of the boiler and a thermal insulating material 25 is provided between the outer wall 11 and the case 26 for thermal insulation.

The operation of the superheated steam boiler for food cooking according to the present invention will be described.

1 and 2, when the water level of the water tank 10 is filled with water, the water pipe 20 is filled with water and the steam pipe 30 is filled with steam. When the burner 40 is ignited, the flames generated in the burner 40 are applied to the water pipe 20 and the steam pipe 30, respectively. At this time, the control valve 45 provided in the second supply pipe 44 may be adjusted so that the flame is not applied to the steam pipe 30 or the flame is applied to the steam pipe 30 at the minimum. When the steam is generated in the water tub and the steam is introduced into the steam pipe 30, the steam burner 47 can be operated normally.

When the water tube 20 is heated by the flame generated in the water tube heating burner 46, the water flowing into the water tube is heated, and the heated water is vaporized by the steam and filled in the upper part of the water tub 10. The steam is introduced into the steam pipe along the inlet of the steam pipe 30, and the steam introduced into the steam pipe is secondarily heated by the flame generated in the burner 47 for heating the steam pipe. Accordingly, the steam is converted into the superheated steam at a high temperature while being discharged through the steam pipe (30) and discharged.

When the water stored in the water tank 10 is vaporized and vaporized, the on / off valve 18 of the water supply pipe 17 is opened by the detection of the water level sensing unit 16 and water is supplied to the water tank 10.

In order to increase the amount of the steam, the thermal power of the burner for heating the water tube can be increased and the thermal power of the burner 47 for heating the steam tube may be increased to increase the temperature of the superheated steam.

In the embodiment of Fig. 3, by constructing the water tube 21 in a coil shape, it is possible to increase the heating area of the coil-shaped water tube 21 to produce more steam.

Further, the embodiment of Fig. The coil-shaped water tube 21 and the steam pipe 31 are formed in a coil shape, but they are formed as a double coil type, so that the heating area of the double coil type steam pipe 31 can be increased to produce superheated steam of a higher temperature.

In addition, water pipes 20 and 21 and / or steam pipes 30 and 31 can be replaced when water leaks or steam leaks due to cracks or dusts in the water pipes or steam pipes during the aging or use of the water pipes or steam pipes of the boiler . First, before the water tubes 20 and 21 and the steam tubes 30 and 31 are replaced, the opening and closing valve 15 of the water discharge pipe 14 is opened and the water stored in the water tank 10 and the sediment deposited in the deposition section 13 And the like. In order to separate the water pipes 20 and 21 and the steam pipes 30 and 31 from the boiler after the water stored in the water tank 10 is completely discharged, Remove the integrated gasket (51) integral inspection plate (50). When the inspection plate 50 is detached, a portion where the ends of the water tubes 20 and 21 and the steam tubes 30 and 31 and the inner wall 12 are joined to the inside of the outer wall 11 is opened. When the joined portion is cut by a welding machine or the like, the water tubes 20 and 21 and the steam tubes 30 and 31 can be separated. The cut and separated water tubes 20 and 21 and the steam tubes 30 and 31 will be replaceable after separating the case 26, the heat insulating material 25 and the burner 40, respectively. Further, the water pipes 20 and 21 for replacement and the steam pipes 30 and 31 are respectively positioned at the joints of the inner wall 12 and then welded and welded together. When the water pipes 20 and 21 and the steam pipes 30 and 31 are completely replaced, the check plate 50 is coupled to the corresponding outer wall 11 with the fixing member 52 to seal the same.

As described above, according to the present invention, there is provided a burner for allowing the flame to be delivered to the water pipe and the steam pipe, respectively, so that the amount of steam and the temperature can be controlled through the water pipe and the steam pipe, And the reliability of the superheated steam boiler for cooking food, such as the simplicity of replacement due to the deterioration of the water pipe and the steam pipe, is improved.

While the invention has been shown and described with respect to the specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone who has it will know it easily.

The present invention relates to an apparatus and a method for controlling the amount of water in a water tank and a method of controlling the same. A gas supply pipe 42, a first supply pipe 43, 45, a regulating valve 44, a second supply pipe 46, a water pipe heating burner 47, a steam pipe heating burner 48, a control valve 49, a damper control member 50, absence

Claims (12)

And an inner wall formed integrally with the outer wall, wherein the inner wall is formed in a shape protruding at a predetermined distance between the outer wall side and the upper wall, A water tank formed to fill the steam generated from the heated water;
A water tube communicating with the water tank at one side of the inner wall to allow the water in the water tank to enter and exit and to heat the filled water;
A steam pipe communicating with the water tank at one side of the inner wall to introduce the steam filled in the water tank and converting the introduced steam into superheated steam,
And a burner which independently applies heat to the water pipe and the steam pipe, respectively.
The water treatment system according to claim 1, further comprising: a water supply pipe communicating with one side of the outer wall of the water tank to supply water into the water tank; a water level sensing part installed in communication with one side of the water tank, And a drain pipe connected to the deposition unit and discharging water stored in the water tank. The open / close valve installed on the water supply pipe is opened / closed by sensing the water level of the water level sensing unit , And an over-heating steam boiler for cooking food in which a drain pipe is provided with an opening / closing valve for opening / closing the drain pipe.
The superheated steam boiler for cooking food according to claim 1, wherein the water tube is linearly shaped, one end closed, and the other end connected to the inner wall.
The overheated steam boiler for cooking food according to claim 1, wherein the water tube is coil-shaped and has both ends communicated with the inner wall.
5. The superheated steam boiler according to claim 4, wherein the water tube is semicircular, the upper portion is straight, and the lower portion is circular arc.
[2] The superheated steam boiler for cooking food according to claim 1, wherein the steam pipe is a coil type, and the inlet through which the steam flows is communicated with the inner wall, and the outlet through which the steam flows flows through the water tank.
[2] The superheated steam boiler for cooking food according to claim 1, wherein the steam pipe is a double coil type, the inlet through which the steam is introduced communicates with the inner wall, and the outlet through which the steam is discharged passes through the water tank.
8. The superheated steam boiler according to claim 6 or 7, wherein the steam pipe is semicircular, the upper portion is straight, and the lower portion is circular arc.
2. The apparatus according to claim 1, wherein a gas supply pipe is connected to the burner, and a gas pipe for heating the water pipe and a pipe for heating the steam pipe are integrally or separately provided in the gas supply pipe, A first supply pipe connected with a burner for burning water and a second supply pipe connected with a burner for heating the steam pipe, and a first supply pipe and a second supply pipe are provided with a control valve for controlling the amount of gas supplied, .
2. The apparatus according to claim 1, wherein a gas supply pipe is connected to the burner, and a gas pipe for heating the water pipe and a pipe for heating the steam pipe are integrally or separately provided, And a damper adjusting member for relatively adjusting the amount of gas supplied to the burner and the burner for heating the steam. The gas supply pipe is provided with a regulating valve for regulating the amount of gas supplied through the gas supply pipe.
[2] The apparatus according to claim 1, wherein the water pipe and the steam pipe end communicating with the inner wall are joined to each other by a weld or a separate structure, and the opening and closing of the through hole formed in the outer wall corresponding to the inner wall end joined with the water pipe and the steam pipe And superheated steam boilers for cooking food, each of which is combined with a fixing member.
The superheated steam boiler for cooking food according to claim 1, wherein the outer wall surface is provided with a heat insulating material for heat insulation and a case is provided on the outer surface of the heat insulating material.

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