TITLE: FUEL SAVING SUPER STEAM BOILERS

FIELD OF INVENTION

The invention is directed to a boiler for producing steam, whether saturated or superheated, using same principle design of water tube boiler, adding a special pressurized tank inside the furnace to get best advantage of kienatic energy in order to reduce needed fuel for producing heat energy inside the furnace.

BACKGROUND OF THE INVENTION

It is well known that steam boilers use the principle of pressurized containers to increase water boiling point highly above 100 c°, thus producing high pressure steam.

In water tube boilers, the water is flowing from the collection tank to the furnace through multiple pipes to increase efficiency. Also, in an improvement of water tube steam boilers, the use of economizer is increasing the efficiency by using wasted heat energy coming through the exhaust chimney, by heating the feeding water.

In this invention, the use of high steam water pressure and kinetic energy is optimized, by adding a pressurized water-steam container inside the furnace, and the said tank will not be producing any steam, so it will be keeping its heat energy, which can be raised by increasing its pressure capacity depending on each boiler design. By making the water tubes pass through the said container, steam production to collection tank will be maximized.

Using this invention, will decrease the need of continuous high heat energy production inside the furnace significantly, leading to significant saving in fuel supply to the furnace regardless of the type of fuel used. By reducing fuel burned, CO2 emissions will be reduced proportionally.

SUMMARY OF INVENTION

BRIEF DESCRIPTOIN OF THE DRAWINGS

Fig (1) shows a longitudinal cross section of typical water tube boiler, in this figure, the steam collection water tank 2 is connected to water feed pump 9, where the water flows to the riser pipes 8, which will be divided to two or more smaller pipes 11, the said pipes are located inside the furnace 4, where the exhaust gases flows through the chimney 5. Fire is produced through the burner 3, the pressurised steam flows out through the nozzle 12, which is provided by a control pressure valve.

Fig (2) shows a longitudinal cross section of the invented Fuel Saving Super Steam Boilers, where the same steam collection water tank 2, is connected to the same water feed pump 9, where the water flows to the same riser pipe 8. A special pressurized water tank 1 is located inside the furnace setting on metal legs 10. The riser pipe 8, is connected to the said tank 1, through a spiral pipe or pipes 6, which goes through the said tank and come out from the other edge. The same furnace 4, is connected to the same burner 3, and the exhaust gases flows through the same chimney 5. The pressurized steam flows out through the same nozzle 12.

DETAILED DESCRIPTION OF THE INVENTION

In this inventions a pressurized water-steam container is added inside the furnace to work as heat energy storage, and because its purpose is not to produce steam out, it will keep the pressure inside, and though the heat energy and the kinetic energy caused by the collision of gas molecules increased with higher pressure leading to increasing the heat energy inside the said container, besides raising the water-steam temperature to significantly high degrees that can reach up to 350 c° with extremely high pressure depending on the steam boiler design.

The water tubes will be passing through the said tank, going into spiral loops to maximize the heat transfer, in order to produce steam which, go to the collection tank in a very efficient manner.

When the pressure inside the said pressurized water- steam tank reaches its design capacity, the needed fire (heat energy) inside the furnace can be reduced significantly, while the heat energy inside the said tank will be almost stable, with the water-steam temperature kept at its design degree, which can be raised up to 350 c°. This will keep the needed heat energy flowing through the water tube pipes producing steam continuously as needed.

When pressure inside the said pressurized water tank decreases the fuel supply to the furnace can be increased for a limited time just to raise pressure inside the said tank again as needed.

This invention will reduce fuel consumption needed for the furnace fire, regardless of the type of fuel used. This also will reduce CO2 emissions significantly, thus considered environment friendly. DETAILED DESCRIPTION OF THE DRAWINGS

Fig (1), Shows a cross-sectional view of the traditional water tank steam boiler. In the said traditional steam boiler, the pressure inside the water-steam collection tank 2, the riser pipe 8 and the water tube pipes 11, is determined depending on the steam boiler design. The water flows from collection tank to riser pipes going into the water tube pipes which are heated inside the furnace 4, through the fire produced by the burner 3.

The steam is produced inside water tubes pipes, flowing through riser pipe back to the collection tank. When the pressure inside the collection tank reaches its design capacity, the pressure control valve inside the nozzle 12 opens, allowing the steam to flow through the nozzle, to be used as per the designed purpose of the steam boiler, and in many types of steam boilers, the steam is subjected to additional fire to turn it from saturated steam to super-heated steam.

When the pressure valve opens allowing the steam to flow, the pressure inside the collection tank will drop unless it is supplied with continuous steam flow which is produced from controlled water supply coming through feed water pump 9, and continuous heat energy produced from burner 3, in order to transfer water flowing inside water tube to steam. The amount of heat energy needed, depends on each boiler type, pressure and capacity.

In this invention, as shown in Fig (2), the same water steam collection tank 2, is connected to riser pipe 8, and from the riser pipes spiral water tubes 6, are branched, and goes through special pressurized water steam tank 1. The said water steam tank 1 , filled with water to 65 % of its volume, and its designed to tolerate significantly high pressure, controlled by safety pressure valve 7. The said tank 1 is located inside the furnace, and will be heated by the fire coming from the burner 3.

The heat energy will create steam inside the said tank 1, and this will raise the pressure and temperature inside it. The maximum temperature that can be achieved is the saturated water steam temperature around 350 C°. By raising the pressure and temperature inside the said tank, the steam gas molecules will collide actively, producing kinetic energy. The water inside the spiral tubes 6 will be heated continuously, producing steam in a very optimized way. When the water is fed inside the collection tank 2 through a water feed pump 9, and the water flows through the riser pipes 8, and continues inside the spiral pipes 6, circulating inside the pressurized tank 1.

The high heat energy inside the said tank 1 is transferred efficiently to the spiral pipes 6, because of the maximized contact area between spiral pipes, water and steam inside the tank 1, thus transferring water inside the spiral pipes to steam, which will flow up through the riser pipe 8 to collection tank 2. When the pressure inside the pressurized tank 1 reaches its design capacity, the burner 3 can be switched off, and the heat energy inside the said tank will remain sufficient to heat the spiral pipes 6, due to kinetic energy principles, because the pressure inside the said tank 1 will not be released, the said tank is sufficiently sealed to maintain the design pressure, and the cooling effect to water steam inside tank 1 from the flow of water through spiral pipes 6 will be relatively slow. When the pressure and temperature inside the tank 1 drops below determined level, the burner 3 will be switched on again.

This technique will achieve significant fuel saving, for the fuel needed to feed the burner. The designed pressure inside the collection tank 2 and the connected riser pipes 8 and spiral pipes 6, is not related to the pressure inside the said tank 1, which will be usually significantly higher. The same goes for the designed steam flow through nozzle 12.

In this invention, the pressurized water steam tank 1 is actually working as heat energy storage. The significant fuel saving can be achieved irrelevant to the type of burner used, whether using diesel, petrol or gas. This significant fuel saving will reduce CO2 emissions and therefore this invention is considered green, and environment friendly.