Top burning hot blast stove with slope-ladder shaped circumferential loop up-spraying ceramic combustor

Abstract

The invention relates to a top burning hot blast stove which comprises a corded type circumferential loop upper spraying ceramic combustor, which can effectively solve the problems of short service life and uneven air flow and nozzle existing pressure. The structure is that a coal gas preheating loop and a combustion air preheating loop are respectively communicated with a coal nozzle and an air nozzle which are staggered in loop on the upper portion, the coal gas preheating loop and the combustion air preheating loop take on a symmetric corded form, and are arranged in the wall body of the combustor, a circumferential loop preheating channel is arranged on the top wall body of the combustor, and is communicated with the coal gas nozzle and the air nozzle, a coal gas inlet which is communicated with the coal gas preheating loop is arranged on the external wall body, the lower portion of the coal gas preheating loop is a combustion air preheating loop, and a combustion air inlet which is communicated with the combustion air preheating loop is arranged on the external side of wall body, choked flow bricks are respectively arranged on the connecting nozzle direction on a coal gas inlet and an air inlet, and a high temperature resistance refractory fiber layer is arranged between the combustor wall body and the walls of a regenerator, thereby effectively solving the problems of uneven air flow and nozzle existing pressure and short service life.

Description

1. Technical field [0001] The invention relates to a hot blast stove, which is a top-fired hot blast stove with a ceramic burner sprayed on a slope-like circumferential ring. 2. Background technology [0002] Ceramic burner hot blast stove is a hot blast stove commonly used in blast furnace ironmaking. Its performance directly affects the normal operation, service efficiency and service life of itself and the blast furnace. There are 3 kinds of external combustion type and top combustion type. But no matter which type of hot blast stove, ceramic burners with different structures are arranged. Existing ceramic burners have various structural problems, which will cause poor gas and air mixing and / or uneven airflow distribution in the hot blast stove, resulting in problems such as unstable combustion, poor regulation performance and poor flame distribution. . In this way, the load requirements and blast temperature requirements of the blast furnace for hot blast cannot be we...

AI Technical Summary

Problems solved by technology

[0003] In view of the above situation, the present invention provides a new top-fired hot blast stove with a ceramic burner sprayed on the slope-like circumferential ring, which can effectively solve and overcome the short service life of the existing burner hot blast stove, uneven air flow, spraying, etc. The technical solution to the problem of uneven tube pressure is to improve the existing hot blast stove, especially the burner, so that it includes a furnace body, a vault and a ceramic burner. The ceramic burner is placed in the arch The upper part of the furnace body below the roof, the ceramic burner has a burner wall, a gas preheating ring, a combustion air preheating ring, and the gas preheating ring, the combustion air preheating ring and the upper part of the ring are respectively arranged alternately The gas at 30-80° is connected to the air nozzle, the gas preheating loop and the combustion air preheating loop are in the shape of a symmetrical uphill and downhill slope, and are arranged in the wall of the burner. The top wall is provided with a circumferential annular preheating channel, which is connected to the gas and air nozzles. There is a gas inlet connected to the gas preheating ring on the outer wall. The lower part of the gas preheating ring is the combustion air preheating ring. There is a combustion-supporting air inlet connected to it on the outside of the wall, flow-blocking bricks are respectively arranged in the direction of the connecting nozzles at the gas and air inlets, and there are alumina high-temperature-resistant refractory fibers between the wall of the burner and the wall of the regenerator. The structure of the present invention is novel and unique, which effectively solves uneven air flow, uneven nozzle pressure and short service life, ensures air temperature and product quality, saves fuel, saves investment, reduces exhaust gas temperature and emissions, and reduces environmental pollution , huge economic and social benefits

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