High-blast-temperature hot-blast stove burnt in convection swirling heat storage medium

Abstract

The invention relates to a high-blast-temperature hot-blast stove burnt in a convection swirling heat storage medium, effectively solving the problems of complicated structure, non-uniform gas mixing, insufficient burning, environmental pollution and energy waste. The stove adopts the structure that a pre-burning chamber of a bell jar on the top of a ball and a taper-section barrel-shaped burning chamber below the pre-burning chamber are connected by using a labyrinth without stress action; the taper-section burning chamber is sufficiently filled with porous heat storage bodies; a coal gas inlet pipe and an air inlet pipe are distributed on the vertical wall of the pre-burning chamber; a barrel-shaped heat storage chamber is arranged below the burning chamber, and checker brick heat storage bodies are stacked on grates in the heat storage chamber; a cold air chamber is arranged below the heat storage chamber, and a smoke exhaust pipe and a cold air inlet pipe are connected to the wall; the grates for holding the heat storage bodies are mutually spaced with expansion gaps, put on a beam and supported by grate supporting posts; the supporting posts are fixed on a rigid base of the hot-blast furnace; and a central vault line of the pre-burning chamber is provided with a hot-blast outlet pipe coaxial with the hot-blast furnace. The invention has the advantages of simple structure, high mixed burning intensity, good air flow heat exchange effect and raised hot-blast temperature.

Description

1. Technical field [0001] The invention relates to a hot blast stove, especially as a kind of equipment that provides high-temperature and high-pressure blast for ironmaking blast furnaces, or provides hot blast for general industrial heating, and is a high-blast-temperature hot-blast stove that burns in a counter-swirl heat storage medium. . 2. Background technology [0002] At present, blast furnace hot blast stoves have entered the era of top-fired hot blast stoves. From the perspective of energy saving and consumption reduction, blast furnace blasts are required to develop in the direction of high blast temperature, especially when burning low calorific value blast furnace gas to obtain high hot blast temperatures, and must reach a certain level. Thermal efficiency, and ultimately achieve the goals of high efficiency, energy saving, environmental protection, and increased production. To achieve high efficiency and high air temperature for a hot blast stove, the key lies...

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Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to propose a novel hot blast stove with a simple structure and no space for the combustion chamber, which is called a high-temperature hot air stove for combustion in a counter-swirling heat storage medium. The hot blast stove effectively solves the problems of complex structure, uneven gas mixing, insufficient combustion, environmental pollution, and waste of energy. The technical solution is that the overall shape of the hot blast stove is bowl-shaped, including the upper pre-combustion chamber , the conical combustion chamber (2), which together form a space in which the airflow can rotate, mix, and burn; the gas inlet pipe (7) and the air inlet pipe perpendicular to the axis of the hot blast stove are symmetrically arranged on the wall of the pre-combustion chamber (1) (8), a hot blast outlet pipe (9) coaxial with the hot blast stove is installed on the dome of the pre-combustion chamber (1); the gas inlet pipe (7) and the air inlet pipe (8) are formed by a circular shape before entering the pre-combustion chamber. The cross-section changes to a rectangular cross-section with a certain rotary cutting angle; the conical section combustion chamber (2) is fully filled with a porous heat storage body (3), which is composed of lattice bricks with a large unit heat exchange area. The hole is a conical structure or a special-shaped structure, the diameter of the grid hole is smaller than the hole spacing, and there are communicating grooves between the holes to make the air flow communicate; the bottom of the combustion chamber 2 is the regenerator (5), and the checker brick regenerator is piled inside it. (4), and then there is a cold air chamber (6), the wall is connected with a flue gas discharge pipe (11), and a cold air inlet pipe (10); the heat storage body is placed on the furnace grate (12), and There are pillars (13) supporting the grate, which are fixed on the rigid base of the hot blast stove; if the regenerator checker brick can use a special honeycomb ceramic structure, the effect will be better, and this choice must also be matched with the main heat storage below. The structure of the checker brick (4) is associated with

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