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Combustion nozzle of gasification stove of using pressed dry coal powder

A technology for pressurized gasification and combustion of nozzles, which is applied to burners, burners, combustion types and other directions of burning powder fuel, can solve problems such as restricting the service life of the burner, increasing processing difficulty, and wear of the pipe wall at the outlet, etc. To achieve excellent cooling function, the effect of low adhesion

Active Publication Date: 2009-03-18
AIR PROD & CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the long-term use and research of the device, it was found that because the swirl device 20 of the nozzle is provided with multi-turn spiral ribs, the difficulty of processing is increased, and the sealing of the end of the burner is poor, which restricts the burner. service life
[0007] In addition, the above-mentioned two existing burner structures all focus on improving the cooling effect of the heating surface at the end of the burner, but due to the large friction coefficient of dry coal powder, the tube wall at the outlet is severely worn. has not been resolved

Method used

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  • Combustion nozzle of gasification stove of using pressed dry coal powder
  • Combustion nozzle of gasification stove of using pressed dry coal powder
  • Combustion nozzle of gasification stove of using pressed dry coal powder

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Embodiment Construction

[0021] image 3 It is a schematic diagram of the internal structure of the combustion nozzle of the dry pulverized coal pressurized gasifier of the present invention. see image 3 As shown, the combustion nozzle 30 of the dry pulverized coal pressurized gasifier of the present invention includes a central passage 34 and an outlet 35 arranged along the longitudinal axis 32 of the nozzle, which are used to transport pulverized coal into the gasifier, and a center passage around the center The channel 34 and the annular channel 36 coaxially arranged therewith and the gas supply port 37 are used for delivering oxygen-containing gas into the gasifier, and a cooling channel 38 arranged on the periphery of the annular channel 36 is used for circulating coolant. The combustion nozzle 30 has a front end surface 31 at the discharge end, and the outlet 35 of the central channel 34 is arranged at the center of the front end surface 31, and the pulverized coal is sent into the furnace fro...

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Abstract

A combustion nozzle of pressurized gasification furnace using dried coal powder as fuel material consists of central channel, ring channel and cooling channel. It is featured as forming cooling channel by cooling cavity with spiral channel, transfer tube and return-flow tube; forming said spiral channel by setting spiral rib structure in said cooling cavity and forming backward spiral channel by setting spiral rib in return-flow tube; forming nozzle front end by high temperature thin alloy wall and setting out let of central channel to be lower than air supply port of ring channel.

Description

technical field [0001] The invention relates to a combustion nozzle of a dry coal powder pressurized gasification furnace. Background technique [0002] Due to the increasing shortage of oil resources, how to efficiently utilize another abundant coal resource has become an important issue in today's energy utilization. [0003] In order to improve the combustion efficiency of coal, the current coal gasification technology is generally divided into two types, one is coal water slurry gasification technology, and the other is dry coal powder gasification technology. Most of the existing burners at home and abroad are mostly suitable for coal-water slurry gas production, and their service life is too short, which seriously restricts the improvement of production efficiency, and does not match the practice of overhauling chemical equipment once a year, which increases maintenance costs. [0004] Partial combustion of dry coal powder is also called gasification. It is completed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D1/00C10J3/20
CPCY02E20/18
Inventor 朱国庆张永贵
Owner AIR PROD & CHEM INC
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