FI82765B - Combustion vessel for the combustion of multi-fraction gases - Google Patents

Description

-1- 82765

COMBUSTION PLATE FOR COMBUSTION OF MULTI - FRACTION GASES

The present invention is intended to improve the combustion of gases emitted and difficult to burn from, for example, wood, coal, peat, etc., to accelerate ignition and to reduce the pollution effects of the initial and actual combustion stages.

5 Numerous solutions have been proposed for the combustion of solid fuels.

The inventions aimed at improving the combustion of the flame phase are based on the external assistance of the pa-1 process. Such solutions include; masonry of fireboxes, directing the combustion air to combustion at different stages, preheating with fires, various grate solutions and, in one main form, ratio extensions to extend the residence time of the flame by turning the flame into a vortex, so that the furnace does not need to be enlarged. These solutions do not improve the combustion process in all respects, but are partial solutions.

The problems are due to a poor understanding of combustion. The combustion of solid fuels is in two stages: The heat produced by the combustion of coal burns the fuel. Part of the primary air stream is converted from coal to reducing, whereby the heat-binding process lowers the temperature of the rest of the coal with the passage of the gases.

- When, for example, wood decomposes under the influence of heat, there are numerous events'. ! different stages and cannot be clearly distinguished. Not all decomposition products can flow evenly through the carbon and do not get the same initial temperature for the initial stage of the flame.

The flame burns slowly starting for three reasons. First, the low temperature of the coal stage: the low temperature of the final stage passes directly to the initial stage of the flame.

: Y: Second, the amount of vaporous and liquid products is large, and only 25 small parts of the products are in gaseous form. The third is the slow reaction rate of oxygen at +600 C® lower temperature.

Moisture in the fuel is most detrimental to bad burns. Generally, a flame ignites as a result of lucky events when hot tabs from a vague fuel charge ignite the beginning of the flame. The chips are the last of the tii-30 and its combustion most often has ignition problems.

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There are two main ways to improve combustion: The substances that start the flame should be in gaseous form and bring the temperature of the oxygen to the combustion to a minimum of +600 ° C.

Of the various solutions for improving combustion, 40 cyclone combustions are essentially different from the present invention, although their solution differs substantially from that presented here.

For example, DE 344 407 discloses a cyclone housing after a furnace for burning a flame. In the middle of the solution is a lowered flue gas pipe, where the purpose of the lowering is to help the vortex to form and to increase the height of the combustion chamber to ensure a sufficiently long residence time for the flame.

The channel space 6 of the invention according to DE 344 407 is lowered and is intended to act as a separator for solids coming from the housing. The solution works satisfactorily only at a certain power. Too little combustion 50 results in the directing of the gases directly into the pipe 5 and ceases to function even for the original purpose. Increasing the combustion power also leads to unsatisfactory operation for the original purpose when the vortex of the cyclone housing is strong enough to leave dust on the walls due to centrifugal force.

The solution according to DE 344 407 does not correspond to the invention explicitly disclosed herein, because the heat at the end of the flame is not transferred to the beginning of the flame, the base 3 is too thick and the gas flow circulates past the tube 5 in a wide circle The impression of heavy and a further 60 flammable substances on the perimeter also makes it difficult for heat to transfer to them. Circulating the flame also causes the transfer of dirty substances'! in reverse order.

DE 1 751 022 discloses an invention based on the foregoing, in which air blowing is used to form a vortex. Again, a tendency to correct the gases cannot be avoided, because the central tube operates at partial power under the effect of traction, in contrast to the method disclosed in the publication.

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The purpose of the tube 13 is to provide a vortex, i.e. a cyclone. Since the cyclone lacks a base, in the solution according to the publication, the end of the flame 70 and the flame initiating combustion come into direct contact. The solution according to the publication of the publication improves combustion only when the radii of heat of the edges of the edges of the cyclone housing are directed inwards. Although the property is generally mentioned to be advantageous for flame combustion, the temperature of the masonry does not correspond to the temperature of the flame, in which case the masonry acts only as an insulator of some kind.

The air blowing used in the solution according to publication 1 751 022 forces the heavy substances on the circumference, making it difficult for them to burn, whereby the invention disclosed in the publication does not transfer the heat of the flame from the end of the flame to the beginning of the flame.

80 Also Us. the arrangement disclosed in U.S. Patent No. 2,725,950 is based on a similar purpose to separate fly ash from a burning or burning flame.

It is essential for the solutions presented above that their action to enhance the combustion of the flame would require the effect of the buoyancy of the flame, whereby the flame. . ·. 85 ki would linger longer at the top of the cyclone and have time to burn almost to completion. In addition, they are characterized in that they operate in only one position.

. . Tilting or turning makes them inoperable. The above inventions are characterized by an extension of the burning time by means of a cyclone f, for which a vortex-forming central tube is used. In this case, the possible solids would burn back at the edges of the cyclone and the ash residue would be less.

The burning dish shown in the present invention operates in a different manner. It is characterized by e.g. operating regardless of position.

: Y The combustion power can also vary, as the intermediate cover always forces a gas flow of 95 equal distances, regardless of the amount of gas. The first stage of the present invention does not create a vortex, but the gas stream is forced to collide with the tube and the initial part of the burner is symmetrical. The features of the invention will become apparent from the claims.

Essential to the present invention is that the internal process of the flame -4-82765 100 is altered by transferring the hot heat from the end of the flame to the cold start of the flame. Heat exchange is not possible without a temperature difference, nor is it possible without targeting favorable events.

Drawing 1 shows the burning bowl in side and top sectional views.

105 The firebox is placed as an extension of the grate. The gas flow is directed through the I-

weather intermediate space A, which is limited by the top cover 3 and the intermediate cover 2, and each side lids 5. The space A through lead closed in this state the tube 4 with the two sides and the same lateral covers 5 limited by the gas flow to the intermediate deck 2 and the tube 4 of the rear opening 8 of the lower space B, 110 by delimited by the intermediate cover 2 and the bottom cover 1 and their side covers 6. The gas burning from the base space B is directed inside the pipe 4 opening there and passes inside the pipe 4 through the intermediate space A outside the upper cover 3. The secondary air 7 is directed to a combustion point at the end of the grate.

The operation of the burning pan is based on the transfer of heat from the end of the flame to the beginning of the flame. In this way, the various decomposition products are decomposed into gases very quickly at the very beginning of the combustion phase. When the temperature of the secondary air is also made high, the combustible gas and oxygen combine at the outset. The result is a combustion event that becomes transparent, with the combustion event resembling the combustion of natural gas. The burning speed of the Sa-120 racket increases 15 to 30 times compared to yellow flame burning.

In a firebox, the flame combustion is changed. Suitably by changing the distance between the head 4 and the side covers 5, two rectangular ducts are formed, through which the combustible gas and air are passed. The collision of the gas-125 with the pipe 4 improves the heat exchange. The volume of the dish is small, as is the amount of substances used. Due to the rapid warm-up, the smoking time of the • · initial stage of combustion is short.

The firebox is characterized by the transfer of heat from the center to the edges.

Because expanding surfaces mean a drop in temperature, conventional furnace masonry essentially functions only as heating insulation.

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Claims (2)

1. Polttomaija monijakeisten kaasujen polttamiseksi siirtämällä liekin loppuosan kuumempaa lämpöä suoralla väliainekosketuksella liekin kylmempään alkuun tunnettu siitä, että yksipuolisella sisään-menoaukolla (A) varustettu polttomaija muodostuu ylätasosta (3) yes VA litasosta 135 (2), joiden keskivaiheilla sopivassa kohtaa sijaitsee NAMA tasot lävistävä putkimainen osa (4), joka toimii lämmönvaihtimena, jja sivuilla rajoittavat seinät (5), ja kulkee kaasuseos putken (4) ja seinämien (5) rajoittamassa kaksipuolisessa tilassa tason (2) takana olevan aukon! (8) kautta poat , jota rajoittaa velitaso (2), pohjata-140 so (1) yes civivinet (6) yes kulkee palava kaasu tilaan (B) of the puten (4) yes putkea (4) pitkin velitilan (A) lip, jossa luovuttaa suitable A) virtaavaan kaasuun ja poistuu putken (4) yläpuolisen aukon kutta yläkannen; (3) yypole cell. -6- 82765 1. A fuel source for combustion of multi-fraction gas mixtures by transferring higher heat from the later part of a flame through direct medium contact to the cooler anterior part of the flame, characterized in that it has an unilateral inlet opening A; the fuel burners consist of an upper pane (3) and an intermediate plane (2) and a pS a suitable location approximately in the middle of these arrangements, these pipes intersecting 150 tubular part (4) serving as heat exchangers, and the side boundary walls (5), and that the gas mixture flows in a two-sided space limited by the pipe (4) and the walls (5) through an opening (8) located behind the plane (2) to the bottom space B bounded by the intermediate plane (2), the bottom plane (1) and the side walls (6) and the burning gas 155 flows all the way to the orifice of the pipe (4) which opens into the space B and along the pipe (4) through the intermediate space A where it gives off heat to the gas flowing in the room A and discharges through an opening pipe (4) to the air above the intermediate lid (3).