Energy-saving inclined-bottom heating furnace

Abstract

The invention relates to an energy-saving inclined-bottom heating furnace. The furnace has a hearth. A preheating channel and a heating channel inclined downwards are sequentially arranged in the hearth from an inlet port. The heating channel communicates with a natural gas pipe used for providing fuel. The slope alpha of the preheating channel is 8 DEG, and the slope beta of the heating channel is 4-6 DEG. A plurality of trumpet-shaped material poking ports with larger ports facing inwards are arranged on both side walls of the hearth. According to the invention, the natural gas pipe is adopted, and a fuel generation device is not needed, such that cost is low; natural gas has high cost performance; hearth slope is small, such that heating time is long, and energy-saving and consumption-reducing effects are provided; with the material poking ports, energy can be saved, consumption can be reduced, and operation condition can be improved; heat loss at furnace top can be reduced, and service life can be prolonged; with a slide rail and a surface brick layer, furnace bottom wear resistance can be enhanced, and service life can be prolonged; certain gap exists between the furnace bottom and a billet bottom, such that billet treatment effect of the hearth can be improved; and with burner nozzles connected in parallel, heating quality can be improved, management is convenient, and safety is high.

Description

technical field [0001] The invention relates to a seamless steel pipe production equipment, in particular to an energy-saving inclined-bottom heating furnace. Background technique [0002] Inclined bottom heating furnace is one of the main equipments for producing hot-rolled seamless steel pipes. It is a kind of thermal equipment for heating round steel billets before piercing. Its fuel selection, furnace type design is reasonable or not and the energy consumption is directly related to the level of production costs. The structure of the inclined-bottom heating furnace includes a feed door, and the feed door is inwardly a conveying channel, that is, the furnace. The round billet in the preheating channel of the inclined bottom furnace is preheated; the bottom wall of the furnace is inclined and has a brick structure, so that the round billet rolls down to the heating channel to complete the feeding process and heating. [0003] The fuel used in the traditional inclined bot...

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Problems solved by technology

[0003] The fuel used in the traditional inclined bottom heating furnace includes coal, hot gas, heavy oil, etc.; if coal is used directly, the total consumption will be high, and the heating quality will not meet the requirements; while heavy oil is used, the one-time investment cost is too high , and it is not convenient for production management; if hot gas is used, a gas generator needs to be installed, the quality and safety requirements of management and equipment are high, and the equipment cost is also high

The conveying channel of the traditional inclined bottom heating furnace has a large slope, usually 11° to 13°, the round billet rolls down quickly, the high temperature area is not suitable for buffering, and the heating time at the same length is short, and the heating is not sufficient ; If the slope is large, the height of the feed door will be large, and the work done to transport the round billet to the feed door will be more; in addition, the feed opening adopts a straight-through large opening, and the operating conditions of the workers are harsh, and the heat is easy to lose

To sum up, the traditional inclined-bottom heating furnace consumes a lot of energy and has high production costs.

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