Dust fuel burners and entrained bed gasifiers for synthesis gas production

Abstract

The invention relates to a pulverized fuel burner and an entrained flow gasifier with several such burners for the production of synthesis gas, the burner connecting pieces are arranged for the supply of fuel dust and coolant on an outer double-walled sleeve, the one a central tube in radial distance concentrically surrounding and to the central channel an annular channel for the promotion of the combustion dust forming the burner mouth, the burner has 1 connection port for an oxidizer, and for cooling water at double central tube for the promotion of the oxidizing agent to the burner mouth. The invention provides a pulverized fuel burner for the production of synthesis gas with a higher wear resistance, low tendency to clog and optimal mixing of pulverized fuel and oxidant to be created, which is suitable for use in an entrained flow gasifier. According to the invention of the pulverized fuel supply to the burner mouth underneath an opens tangentially inlet opening for the pulverized fuel in the annular channel a distributor with several annular sections circumferentially distributed funnel-like depressions with outlet available, each outlet opening in an axially parallel straight pulverized fuel channel with approximately rectangular cross-section within the annular channel opens, wherein the cross-sectional area of the pulverized fuel channels together corresponds to the cross-sectional area of the inlet opening for the pulverized fuel, said pulverized fuel channels open into a spiral plenum front of the burner mouth defined by an upper coil, which the spaces of the annular channel between the outlet openings of the pulverized fuel channels closes, a parallel to bottom coil to swirl generation in the pulverized fuel flow and a two helices interconnecting web is limited.

Description

technical field [0001] The invention relates to a dust-fuel burner for the production of synthesis gas by partial oxidation of dust-like fuel in an entrained-bed gasifier and to an entrained-bed gasifier according to the preamble of the first claim. Background technique [0002] Dust fuel should be understood as solid fuel, such as carbon of different carbonization grades and coke of different specifications. [0003] Autothermal entrained bed gasification from solid, liquid and gaseous fuels has long been known in the gas production process. [0004] In the case of entrained bed gasification, the burners are arranged at the head of the gasification reactor and the gas flow is directed downwards. The crude gases and slag that occur during the partial oxidation of carbon are discharged through a central opening at the bottom of the gasification chamber. Such a gasification reactor is shown, for example, in DE4109231C2. [0005] Fuel, oxygen and, where appropriate, steam ar...

AI Technical Summary

Problems solved by technology

A disadvantage of this solution is that there is only one coal supply pipe in the annular channel, thus limiting the burner efficiency

Another disadvantage is that there is a risk of abrasion of this coal supply pipe due to the frictional action of coal dust in the curved area of ​​the channel

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