JP2005069568A - Combustion method for boiler using water as subfuel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce NOx and CO in a conventional structure arranged with a plurality of water pipes, supplying combustion gas from a crossing direction of the water pipes, provided with a vaporizing combustion burner at a suitable distance from the first water pipe, and housing the plurality of water pipes and the vaporizing combustion burner in a can. <P>SOLUTION: In the boiler for kerosene, combustion gas, and heavy oil, when a boiler temperature rises to about 600 degrees, air and water is sprayed to use heat of vaporization and raise the boiler temperature to about 1100 degrees. During temperature rising, supply of fuel such as kerosene and combustion gas is reduced, and atomized water is supplied to use water as subfuel for continuing combustion of the boiler. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a combustion method for a boiler configured to use water as an auxiliary fuel.

  As is well known, a boiler has a structure in which a combustion chamber is formed in a sealed steel casing, and an object to be heated in a heat transfer tube is heated by radiant heat transfer from the combustion chamber and combustion gas contact heat transfer, or A combustion chamber is formed, hot air from the combustion chamber is fed into the heat transfer tube, and steam is exchanged through heat exchange by means of radiant heat transfer between the medium and fluid in the heat transfer tube and contact heat transfer with the combustion gas, etc. The structure to be constructed is known.

  The conditions required for these structures are required to efficiently exchange heat, not generate harmful exhaust gas (utilization of clean energy), or economical.

  A boiler that uses vaporized combustion is known as one that is relatively equipped with such conditions. For example, as Patent Document 1, there is a multi-tube type once-through boiler disclosed in “Japanese Patent Laid-Open No. 5-26403”. In the present invention, a plurality of water tubes are cascaded, combustion gas is fed to the water tubes in the crossing direction, and a vaporized combustion burner is provided at an appropriate distance in the first water tube, and these It has a structure in which multiple water pipes and a vaporized combustion burner are housed in a can body, and is intended to reduce NOx and CO.

Japanese Patent Laid-Open No. 5-25403

  Patent Document 1 has a structure that utilizes efficient heat exchange of combustion gas, and can be expected to have a certain effect. However, it is not related to drastic reform of fuel consumption and improvement of combustion itself, so it seems that it remains in the area of conventional improvement. In addition, it is thought that this is not familiar with drastic improvements related to the environment.

  The invention of claim 1 is a “combustion method of a boiler having water as a secondary fuel” and relates to a fundamental reform of conventional fuel consumption and improvement of combustion itself. Intended. In addition, this is a drastic improvement on the environment and is intended to improve all the environment such as the global environment and living environment.

  Claim 1 is a boiler for kerosene, combustion gas, and heavy oil.When the boiler temperature rises to about 600 degrees, the temperature of the boiler is about 1100 degrees by spraying air and water and using heat of vaporization. Boiler with a configuration that uses water as a secondary fuel to reduce the supply of fuel such as kerosene and combustion gas at the time of this temperature rise, and supply atomized water to continue boiler combustion This is a combustion method.

  The invention of claim 2 is intended to achieve further improvement of fuel efficiency and establishment of environmental maintenance while achieving the object of claim 1.

  Claim 2 is a configuration for supplying the atomized water according to claim 1 and continuing combustion of the boiler, wherein the water configured to achieve water vaporization combustion using the supply of water is sub-charged. It is a combustion method of a boiler configured as fuel.

  According to the invention of claim 1, in the boiler for kerosene, combustion gas, and heavy oil, when the boiler temperature rises to about 600 degrees, the boiler temperature is substantially reduced by spraying air and water and using heat of vaporization. The temperature is raised to about 1100 degrees, and at the time of temperature rise, the supply of fuel such as kerosene and combustion gas is narrowed, atomized water is supplied, and water that is configured to continue boiler combustion is used as a secondary fuel. It is a combustion method of a boiler.

  Accordingly, claim 1 is a “combustion method of a boiler having water as a secondary fuel”, which relates to a fundamental reform of conventional fuel consumption and an improvement of combustion itself. There is a feature that can be improved. In addition, the environment is drastically improved, and there is an advantage that all environmental improvements such as the global environment and living environment can be achieved.

  The invention of claim 2 is a configuration in which the atomized water according to claim 1 is supplied and combustion of the boiler is continued, and water configured to achieve water vaporization combustion using the supply of water is provided. This is a method for burning a boiler configured as an auxiliary fuel.

  Therefore, claim 2 has features such as achieving higher fuel efficiency and establishing environmental maintenance while achieving the object of claim 1.

  An example of the present invention will be described.

  In the boiler for kerosene, combustion gas, and heavy oil, the time when the boiler temperature is about 450 to 750 degrees, preferably about 600 degrees is captured. At this time, air and water are sprayed to use the heat of vaporization, and the boiler temperature is instantaneously raised to about 1000 to 1200 degrees, preferably about 1100 degrees. The boiler body casing (boiler) is maintained at a high temperature. And this temperature rising atmosphere (state of high temperature atmosphere) can be easily and reliably performed using the above-mentioned operation and / or selection, blending or supply amount of the combustion products.

  Next, in this high temperature atmosphere at the time of temperature rise, the supply of fuel such as kerosene and combustion gas is narrowed down and atomized water is supplied to achieve water vaporization combustion (combustion mainly composed of water). By doing so, since instantaneous combustion and energy conversion (heat exchange, power source, etc.) can be achieved, for example, fuel cost in this type of boiler can be saved.

  Further, by achieving this water-burning combustion and continuing the combustion of the boiler, the fundamental reform of the conventional fuel consumption and the improvement of the combustion itself can be achieved, or the essential boiler can be improved. And it becomes fundamental improvement about the environment etc., and all environmental improvement, such as a global environment and a living environment, can be aimed at.

  That is, a feature of the present invention is a method for burning a boiler having water as an auxiliary fuel.

Claims (2)

In boilers for kerosene, combustion gas, and heavy oil, when the boiler temperature rises to approximately 600 degrees, spray the air and water to increase the boiler temperature to approximately 1100 degrees using the heat of vaporization. A boiler combustion method in which the supply of fuel, such as kerosene and combustion gas, is narrowed at the time of temperature rise, and atomized water is supplied to continue combustion of the boiler. A configuration in which the atomized water according to claim 1 is supplied and combustion of the boiler is continued, and water configured to achieve water vaporization combustion using the water supply is used as a secondary fuel. Boiler combustion method.