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Gasification chamber with top-mounted nozzles and gasification furnace with gasification chamber

A technology of gasification chamber and gasification furnace, which is applied in the direction of granular/powdered fuel gasification, etc., and can solve problems such as overtemperature of the wall surface or low carbon conversion rate

Inactive Publication Date: 2014-05-28
CHANGZHENG ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen that in the actual operation of the above two typical coal types, some wall overtemperature or low carbon conversion often occur in the actual operation of the gasifier.

Method used

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  • Gasification chamber with top-mounted nozzles and gasification furnace with gasification chamber
  • Gasification chamber with top-mounted nozzles and gasification furnace with gasification chamber
  • Gasification chamber with top-mounted nozzles and gasification furnace with gasification chamber

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Experimental program
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Effect test

Embodiment 1

[0085] exist figure 2 In , only the main nozzle operates, and neither the top auxiliary nozzle nor the side wall auxiliary nozzle operates. At this time, the recirculation zone in the gasification chamber is relatively large, extending from the top of the furnace to the lower part of the furnace. This operating condition is suitable for coal with moderate ash content (10~25%), ash melting point of 1300~1450°C, good viscosity-temperature characteristics, and high carbon conversion rate and stable furnace conditions can be achieved only when the main nozzle is running.

Embodiment 2

[0087] exist image 3 , the main nozzle and the side wall auxiliary nozzle operate simultaneously. This operating condition is used to improve the situation of low carbon conversion rate. For example, when coal with low ash and narrow viscosity-temperature characteristics is used, the operating temperature is low and the range of high temperature zone is small, so that the effective residence time of pulverized coal particles in the high temperature zone is biased. Low resulting in low carbon conversion rate. In the figure, the auxiliary nozzles on the side wall are located in the straight section of the wall of the gasification chamber, and 4 are evenly arranged in the horizontal direction. The angle between the axis of the nozzle and the radial direction of the gasification furnace is 35 degrees. Each auxiliary nozzle on the side wall has a double-channel structure, the central channel 14 leads to the oxygen-containing premixed gas, and the outer channel 15 leads to the ash...

Embodiment 3

[0089] exist Figure 4 , the main nozzle and the top auxiliary nozzle operate simultaneously. This operating condition is used to improve the overheating of the wall of the gasification chamber, such as the high temperature of the wall of the gasification chamber caused by high operating temperature when coal with high ash and high ash melting point is used. Figure 4 There are 4 auxiliary nozzles on the middle top evenly arranged in the horizontal direction, and the arrangement method is opposite. The inside of the nozzle is a flat duckbill-shaped channel 16, and the cross-section 13 of the spray area 13 is oblate. Since the ejection medium does not contain oxygen, the formed jet zone is a low-temperature zone, which isolates the flame from the wall and reduces the temperature near the wall of the gasification chamber. Especially when the injection medium is ash-containing crude syngas, due to the absorption and heat dissipation of the particles, the temperature of the wall ...

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Abstract

The invention relates to a gasification chamber with a top-mounted main nozzle and a gasification furnace. The gasification furnace comprises a furnace body shell, the gasification chamber arranged at the inner upper part of the shell, a chilling chamber positioned at the inner lower part of the shell, a deslagging port positioned at the bottom of the gasification furnace and a synthetic gas outlet positioned in the lower sidewall of the gasification furnace, wherein the gasification chamber comprises the main nozzle positioned in the top center of the gasification furnace or / and top auxiliary nozzles on the top tapered section of the gasification furnace or / and sidewall auxiliary nozzles positioned on the straight section sidewall of the gasification furnace; the inner wall of the gasification chamber can be an inner wall consisting of a refractory material or a composite inner wall consisting of a water-cooled wall and a refractory-material lining. According to the gasification chamber and the gasification furnace, due to the combined control of the main nozzle and the auxiliary nozzles, the effects of optimizing the distribution of a flow field in the furnace, prolonging the effective retention time, increasing the carbon conversion rate and reducing the local overtemperature of a wall surface are achieved.

Description

Technical field [0001] The invention relates to a nozzle top-mounted gasification chamber in the technical field of coal gasification and a gasification furnace containing it, especially a typical gasification chamber suitable for "low ash and narrow viscosity-temperature characteristics" and "high ash and high ash melting point". Nozzle top-mounted gasification chamber and its gasifier for gasification coal. Background technique [0002] China is rich in coal resources, but most of the coal is low-quality coal, so Chinese owners hope to gasify more low-quality coal to reduce costs. The typical two types are: 1) Low-ash narrow-viscosity-temperature coal, mostly produced in Inner Mongolia, Xinjiang and other regions, with an ash content of less than 10%, a low ash melting point of about 1200°C, and poor ash viscosity-temperature characteristics , that is, the viscosity is sensitive to changes in temperature. 2) Coal with high ash and high ash melting point is mostly produce...

Claims

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Application Information

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IPC IPC(8): C10J3/50C10J3/48
Inventor 王明坤姜从斌信伟张燕葛志红张礼
Owner CHANGZHENG ENG
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