Combustion chamber, coal water slurry gasification furnace with water wall and multiple opposite nozzles, and application of coal water slurry gasification furnace

Abstract

The invention relates to a combustion chamber, a coal water slurry gasification furnace with a water wall and multiple opposite nozzles, and application of the coal water slurry gasification furnace. The combustion chamber comprises a metal furnace housing (1), a pipe coil type water wall internal part (2), a preheating nozzle chamber (3) arranged at the top of the combustion chamber, technological nozzle chambers (4), and a gas-residue outlet (5) formed in the central part of the lower end of the combustion chamber, wherein the technological nozzle chambers (4) are arranged in the upper half space of the combustion chamber in the horizontal direction in 1 to 3 layers, and 1 to 3 pairs of the technological nozzle chambers (4) are arranged on each layer; the pipe coil type water wall internal part (2) is formed by coiling 2 to 10 metal tubes with the same specification; the inlet ends and outlet ends of the metal tubes are connected with a collecting box. The combustion chamber designed by the invention greatly expands the coal type application range of the coal water slurry gasifying technology, and parts can be replaced or maintained separately; the technological nozzles mounted in the technological nozzle chambers (4) can operate entirely or partly, and thus the operating load range of the gasification furnace is greatly widened.

Description

technical field [0001] The invention relates to a combustion chamber and the structure of a coal-water slurry gasification furnace. A water-cooled wall is used as the internal part lining of the multi-nozzle opposed coal-water slurry gasification furnace. Background technique [0002] Entrained bed coal-water slurry gasification technology has been widely used in recent years. Among them, representative technologies include the coal-water slurry gasification technology of GE Company of the United States (formerly Texaco coal-water slurry gasification technology), and the multi-nozzle opposed coal gasification technology developed by East China University of Science and Technology (Chinese patent, patent number ZL98110616.1, ZL2005101114824.8, ZL01210097.8). [0003] Traditional entrained bed coal-water slurry gasification technology generally uses refractory bricks and thermal insulation materials as the thermal insulation lining of the combustion chamber of the gasifier. ...

AI Technical Summary

Problems solved by technology

However, if the gasification temperature is too high, the corrosion of the refractory lining material will be greatly aggravated. In order to ensure a certain service life of the refractory lining material, coal with a lower ash melting temperature has to be used, which greatly limits the high ash that widely exists in China. Applicability of Melting Coal in Coal-Water Slurry Gasification Process

[0006] 2. Refractory bricks need to be replaced regularly, the cost is high, and the environmental problems are relatively large

On the one hand, this increases the operating cost of the enterprise. In addition, since the current refractory brick materials basically use chromium as the main raw material, the preparation and melting of chromium brings serious environmental problems.

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