CS248598B1 - Combustion chamber for low-heating flue gases - Google Patents

Abstract

The solution concerns the combustion chamber for low-calorific heating gases and solves the possibility of burning them from a calorific value of J 200 kj m"2 as the only combustion medium. The combustion chamber equipped with an external body and a counter-flow supply of combustion air, an internal body parallel to the burner's guiding body and a stabilizing burner at the fuel inlet, has a stabilizing The stabilizing grid is made of ceramic heat-resistant fittings, with the advantage of tubes parallel to the direction of the breed, ranging from two-thirds to four times the length of the inner body;

Description

1,248,598

BACKGROUND OF THE INVENTION The present invention relates to a combustion chamber for low-calorific heating gases and solves the problem of extending the possibility of using gases with a calorific value of about 300 kJ at the best combustion and stabilizing the heat output of a conventional heating device.

The combustion chambers used so far are known for the combustion of gases with a calorific value of 12.5 to 30 MJ * m 2 and used to obtain hot flue gases as a heat transfer medium for industrial or agricultural applications, such as for the defrosting of substrates throughout the wagon. kits. There are attempts to use combustion chambers for the purposes mentioned with a built-in stabilizer burner, which adds about 5% of the noble fuel to the combustion space at the root of the flame behind the burner mouth. These burners make it possible to burn gases with a calorific value of 4.5. Even such a combustion chamber treatment, especially when using a burner on a single medium, does not allow the combustion of gases by a lower calorific value, such as blast furnace gas, since, despite the steady running of the stabilizer burner, there was an increased CO content in the flue gas. Thus, a single-fueled burner design is another solution designed to combine the combustion of, for example, noble fuel by co-mixing with low-calorific gas. Though the possibility of using such gases is solved, in particular, the reduction of natural gas consumption and the operative transition to various types of fuel in each case. requires the combustion of a sufficient proportion of the noble liquid fuel usable for other more important economic purposes.

The above mentioned drawbacks are solved and the problem is solved by the combustion chamber for the low-calorific heating gases according to the invention, in which a stabilizing grid of ceramic refractory shapes is formed in the inner telescope, ranging from two thirds to four - 2 - 248 398 »· I * of the inner body length patina, defined by the fuel supply port of the burner head and the exhaust outlet. The ceramic refractory fittings are preferably formed from tubes with axes in the flame direction, are interconnected with each other across the cross-section of the internal space of the combustion chamber, and the internal walls thereof are locked in locks. The advantages of the invention are mainly due to the fact that it is possible to utilize low-calorific firing gases from a heating capacity of 3200 kJ as the only medium and to ensure perfect combustion. It allows the use of the original combustion chamber without changing the burner and the combustion chamber, and in addition to negligible addition of noble fuel through the stabilization burner, the need for addition is avoided.

The combustion chamber 10 consists of an outer body 11 equipped with a counter-current inlet 13 of the combustion air and its deflection wall 16 hung on the burner head 20. In the closed space of the outer body 11, an inner body 12 is positioned a length from the mouth 24 to the outlet 17 of the flue gas corresponding to the flame length for the respective working power which deflection wall 15 with the aperture is parallel to the deflection wall 16 of the outer body 11a, a stabilizing burner 14 is provided in the vicinity of the flame section 24. In the inner body 12 of the combustion chamber 10, a stabilizing grating 30 made of ceramic refractory shaped pipes made of mortar and circumferentially mounted locks is formed at a distance 32 of 0.67 to 0.8 of its length across the cross section. The burner head 20 with gas inlet 23 is provided with a baffle body 21, with peripheral outlets 22 gas entering the combustion chamber space HD, - 3 - 248 598

After igniting the fuel from the stabilizing burner 14, the heating gas adds a flame through the burner head 20. In the stabilizing lattice 30 located behind the core, the flame heats it above the igniting gas temperature, the unburnt gas products ignite again and burn up in the interior enclosure 12 before the outlet 1? flue gas ·

The burner according to the invention can be used in any kind of large volume combustion chambers.

Claims (2)

248 S98 P RE D E TION OF THE INVENTION 1. Combustion chamber for low-calorific flue gases equipped with an external countercurrent combustion air inlet body through an inner body extending toward the burner directional body and a stabilizing burner at the fuel supply orifice, characterized in that the chamber (10) in the inner body (12) there is provided a stabilizing lattice (30) of the heat-resistant refractory elements (31), in the range of two thirds to four patents of the inner body length (12j, defined by the fuel supply element (24) of the burner head (20) and the flue gas outlet (17). Combustion chamber according to claim 1, characterized in that the ceramic refractory (31) refractory bricks (30) are formed from tubes with axes in the flame direction, connected to each other over the entire cross section of the inner chamber of the combustion chamber on the inner walls of the inner body. (12) are held in locks. 1 drawing