Energy-saving super steam boiler

Abstract

A steam boiler is one of the main consumers of fossil energy. They are widely used in a plurality of fields such as power generation by operating steam turbines, heating or food factories. The design of steam boilers has been developed in past 100 years, where one of the most efficient types is a water tube boiler that operates at high pressure to maximize efficiency. In the invention, the utilization of high-pressure water-steam containers and the kinetic energy principle is optimized in a manner to reduce the thermal energy required in the hearth, where the water tank is to be used as a thermal energy reservoir. All the water pipes circulate in the water tank, so that high heat energy stored in the water pipes heats the water pipes, and water in the water pipes is converted into steam. According to the invention, the fuel supply required by the hearth of the steam boiler is obviously reduced, and the carbon dioxide emission is reduced, so that the method is considered to be environment-friendly.

Description

[0001] Field of the Invention The present invention relates to a boiler for generating steam, whether saturated steam or superheated steam, designed on the same principle as a water-tube boiler, by adding a special pressurized water tank in the furnace to make the best use of kinetic energy, thereby reducing the fuel required to generate heat energy in the furnace. Background of the Invention As is well known, steam boilers utilize the principle of a pressurized vessel to significantly raise the boiling point of water above 100 °C, thereby generating high-pressure steam.

[0003] In a water-tube boiler, water flows from a collection tank through multiple pipes into the furnace to improve efficiency. Additionally, in an improvement of the water-tube steam boiler, the use of an economizer further enhances efficiency by utilizing the waste heat lost from the exhaust chimney to heat the feed water.

[0004] In the present invention, the utilization of high-pressure steam and kinetic energy is optimized by adding a pressurized water-steam vessel in the furnace, which does not generate steam and thus can retain its heat energy. By increasing its pressure capacity according to each boiler design, the heat energy can be increased. By passing water pipes through the vessel, the steam production towards the collection tank will be maximized.

[0005] Using the present invention will significantly reduce the need for continuously generating high-temperature heat energy in the furnace, thereby significantly saving the fuel supply to the furnace, regardless of the type of fuel used. By reducing fuel combustion, carbon dioxide emissions will be proportionally reduced. Summary of the Invention

[0006] Brief Description of the Drawings Figure 1 A longitudinal sectional view of a typical water-tube boiler is shown, in which the steam collection water tank 2 is connected to the feed water pump 9, and the water flows towards the riser tube 8, which is divided into two or more smaller pipes 11 located in the furnace 4, where the exhaust gas is discharged through the chimney 5. The flame is generated by the burner 3, and the pressurized steam flows out through the nozzle 12 provided with a control pressure valve.

[0007] Figure 2 A longitudinal sectional view of the energy-saving super steam boiler of the present invention is shown, in which the same steam collection water tank 2 is connected to the same feed water pump 9, and the water flows towards the same riser tube 8. The special pressurized water tank 1 is located in the furnace, placed on the metal legs 10. The riser tube 8 is connected to the tank 1 through a spiral pipe or pipe 6, which passes through the tank and exits from the other side. The same furnace 4 is connected to the same burner 3, and the exhaust gas is discharged through the same chimney 5. The pressurized steam flows out through the same nozzle 12.

[0008] Detailed Description of the Invention In the present invention, a pressurized water-steam container is added in the furnace for thermal energy storage. Since its purpose is not to generate steam outwardly, it will maintain its internal pressure. As the pressure increases, the thermal energy and kinetic energy generated by the collision of gas molecules also increase, resulting in an increase in the thermal energy within the container. Additionally, according to the steam boiler design, the temperature of the water-steam can be raised to a quite high temperature, reaching up to 350°C and accompanied by extremely high pressure.

[0009] The water pipes will pass through the water tank, forming a spiral circuit to maximize heat transfer, thereby generating steam in a very efficient manner and flowing towards the collection tank.

[0010] When the pressure within the pressurized water-steam tank reaches its design capacity, the flame (thermal energy) required in the furnace can be significantly reduced, while the thermal energy within the tank remains almost stable, and the water-steam temperature remains at its designed temperature, up to 350°C. This will maintain the required thermal energy flowing continuously through the water pipes to generate steam as needed.

[0011] When the pressure within the pressurized water tank decreases, the fuel supply to the furnace can be increased within a limited time, solely to raise the pressure within the tank again as needed.

[0012] The present invention will reduce the fuel consumption required for the furnace flame, regardless of the type of fuel used. This will also significantly reduce carbon dioxide emissions and is thus considered environmentally friendly.

[0013] Detailed description of the drawings Figure 1 Shows a cross-sectional view of a conventional water tank steam boiler. In the conventional steam boiler, the pressure within the water-steam collection tank 2, the riser pipe 8, and the water pipes 11 is determined according to the steam boiler design. Water flows from the collection tank to the riser pipe and enters the water pipes, which are heated by the flame generated by the burner 3 within the furnace 4.

[0014] Steam is generated within the water pipes and flows back to the collection tank through the riser pipe. When the pressure within the collection tank reaches its design capacity, the pressure control valve within the nozzle 12 opens, allowing the steam to flow out through the nozzle and be used according to the design purpose of the steam boiler. In many types of steam boilers, the steam will be subjected to additional flame heating to transform from saturated steam to superheated steam.

[0015] When the pressure valve opens to allow the steam to flow out, the pressure within the collection tank will drop unless a continuous steam flow is provided to the collection tank, which is controlled by the feed water pump 9 to supply water and the continuous thermal energy generated by the burner 3 to convert the water flow within the water pipes into steam. The amount of thermal energy required depends on the type, pressure, and capacity of each boiler.

[0016] In the present invention, as Figure 2As shown, the same water-steam collection tank 2 is connected to the riser 8, and the spiral water pipe 6 branched from the riser passes through the special pressurized water-steam tank 1. The water-steam tank 1 is filled with water with a volume of 65%, designed to withstand significant high pressure, and is controlled by a safety pressure valve 7. The water tank 1 is located in the furnace and is heated by the flame generated by the burner 3.

[0017] Thermal energy will generate steam in the water tank 1, which will increase the pressure and temperature inside it. The highest temperature that can be reached is the saturated water-steam temperature, approximately 350 °C. By increasing the pressure and temperature in the water tank, the steam gas molecules will actively collide to generate kinetic energy. The water in the spiral pipe 6 will be continuously heated to generate steam in a very optimized way. When water enters the collection tank 2 through the feed water pump 9, flows through the riser 8, and continues to enter the spiral pipe 6, it circulates in the pressurized water tank 1.

[0018] The high thermal energy in the water tank 1 is efficiently transferred to the spiral pipe 6 because the contact area between the spiral pipe and the water and steam in the water tank 1 is maximized. Therefore, the water in the spiral pipe is converted into steam, which will flow upward through the riser 8 to the collection tank 2.

[0019] When the pressure in the pressurized water tank 1 reaches its design capacity, the burner 3 can be turned off, and the thermal energy in the water tank will be maintained, sufficient to heat the spiral pipe 6. Due to the kinetic energy principle, since the pressure in the water tank 1 will not be released and the water tank is fully sealed to maintain the design pressure, the cooling effect of the water flow through the spiral pipe 6 on the water-steam in the water tank 1 is relatively slow. When the pressure and temperature in the water tank 1 are lower than the determined level, the burner 3 will be turned on again.

[0020] This technology will significantly save the fuel supplied to the burner. The design pressure in the collection tank 2 and its connected riser 8 and spiral pipe 6 has nothing to do with the pressure in the water tank 1, and usually the latter is significantly higher. The same is true for the designed steam flow rate of the nozzle 12.

[0021] In the present invention, the pressurized water-steam tank 1 actually serves as a thermal energy storage. Regardless of the type of burner used (diesel, gasoline or natural gas), significant fuel savings can be achieved.

[0022] This significant fuel saving will reduce carbon dioxide emissions, so the present invention is considered to be green and environmentally friendly.

Claims

1. A boiler for generating steam, whether saturated steam or superheated steam, said boiler comprising a collection tank, downward and upward risers located within a furnace heated by using any type of heat energy (gas, diesel, coal, etc.), wherein said risers are connected in and out of a special pressurized water-steam tank located within the furnace, and wherein the pressure within said special tank is determined according to the steam boiler design.

2. The boiler according to claim 1, wherein said special pressurized water-steam tank contains one or more helical tubes, depending on the width of said tank, wherein said helical tubes are longitudinally located within said special pressurized water-steam tank and are immersed in pressurized heated steam and water.

3. The boiler according to claim 1, wherein the helical tubes within said special pressurized water tank are connected to the risers which extend downward from the collection tank and return upward to the collection tank, allowing water to flow from the collection tank through the risers to said helical tubes, such that the water obtains heat energy within said special pressurized water tank through the hot steam and water within said tank, converting the water into steam which will flow upward back to the collection tank through the risers.

4. The boiler according to claim 1, wherein the two ends of the helical tubes within said special pressurized water-steam tank enter and leave said tank in a tightly sealed manner to prevent pressure leakage from said special tank.

5. The boiler according to claim 1, wherein all the risers and helical tubes within said special tank are designed to withstand high pressure values, depending on the type and design of each boiler, and wherein the pressure capacity of said risers and helical tubes is equal to the pressure capacity of the collection tank.

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