Biomass three-section type entrained flow bed gasification technology with function of waste heat utilization

Abstract

A gasifier of biomass three-stage entrained flow bed using exhausted heat includes a high-temperature entrained flow bed, a high-temperature heat exchanger and a low-temperature heat exchanger. A quenching chamber and a high-temperature super-heater are arranged in the high-temperature heat exchanger. The temperature of synthetic inlet gas of the quenching chamber is ranged from 1000 to 1100 degrees centigrade. The temperature of synthetic outlet gas of the quenching chamber is ranged from 700 to 800 degrees centigrade. The inner wall of the low-temperature heat exchanger is equipped with optical tube film-type water cooled wall. A low-temperature super-heater and an economizer are arranged in the low-temperature heat exchanger. The gasification method of the gasifier of biomass three-stage entrained flow bed using exhausted heat involves that coal powder, pyrolysis gas and oxygen after biomass pyrolysis flow into the entrained flow bed through the burner to obtain synthetic gas by gasification, and exhausted heat of gasification is passed to water by the heat exchanger of the gasifier to obtain super-heat steam. High-temperature synthetic gas flows out from the gasifier after cooling.

Description

technical field

[0001] The biomass three-stage entrained gasification technology with waste heat utilization of the present invention relates to the technical field of energy and chemical engineering; in particular to the technical field of biomass thermochemistry; especially to the technical field of biomass gasification technology; specifically to the utilization of waste heat The technical field of biomass entrained bed gasification. Background technique

[0002] Plants in biomass are organic substances generated by absorbing carbon dioxide in the air through photosynthesis, which are widely distributed, available in large quantities, and are the only renewable natural raw materials that contain hydrocarbon components and heat energy and can be stored; Substances for energy utilization and chemical production, with CO 2 Characterized by zero emissions. With the decrease of traditional fossil energy reserves and the environmental pollution caused by the use of fossil ene...

Examples

specific Embodiment approach 2

[0107] Implement on the basis of specific implementation mode 1 implementation, such as figure 1 As shown, the top of the high-temperature entrained bed of the three-stage entrained-bed gasifier device is arranged with a down-flow burner, and the carbon powder, pyrolysis gas and oxygen enter the high-temperature en-flow bed through the down-flow burner The gasification reaction is carried out in the high-temperature air-flow bed, the syngas goes down in the high-temperature air-flow bed, enters the high-temperature heat exchanger through the connecting channel formed by the smooth tube membrane water wall on the inner wall, and goes up to cool after being rectified and rectified, and then passes through the inner wall by the smooth tube The connecting channel formed by the membrane water wall enters the low temperature heat exchanger and is rectified by the rectifier and then descends to cool down. The biomass raw material used is still Quercus sp. (see Table 1 in Embodiment 1...

specific Embodiment approach 3

[0114] It is still implemented on the basis of specific implementation mode 1, such as figure 2 As shown, only: the top of the high-temperature entrained bed of the three-stage entrained-bed gasification furnace device is arranged with a down-flow burner, and the carbon powder, pyrolysis gas and oxygen enter the high-temperature air through the down-flow burner The gasification reaction is carried out in the entrained bed, and the synthesis gas descends in the high-temperature entrained bed, enters the high-temperature heat exchanger through rectification and constriction to cool down, and then enters the low-temperature heat exchanger through the connecting channel whose inner wall is composed of a smooth tube membrane water wall And after rectification and necking rectification, it goes up to cool down. The biomass raw material used is still Quercus sp. (see Table 1 in Embodiment 1) as an example, and the main process operating conditions are as in Embodiment 1. The result...

specific Embodiment approach 4

[0121] It is still implemented on the basis of specific implementation mode 1, such as image 3 As shown, only: the lower part of the high-temperature entrained bed of the three-stage entrained-bed gasifier device is arranged with a horizontal burner, and the charcoal powder, pyrolysis gas and oxygen enter the high-temperature air through the horizontal burner. The gasification reaction is carried out in the entrained bed, and the syngas goes up in the high-temperature entrained bed, enters the high-temperature heat exchanger through rectification and constriction, and then enters the low-temperature heat exchanger through the connecting channel formed by the smooth tube membrane water wall on the inner wall and After being rectified by the rectifier, it is cooled downwards. The biomass raw material used is still Quercus sp. (see Table 1 in Embodiment 1) as an example, and the main process operating conditions are as in Embodiment 1. The result obtained through implementation...

technical field

[0001] The biomass three-stage entrained gasification technology with waste heat utilization of the present invention relates to the technical field of energy and chemical engineering; in particular to the technical field of biomass thermochemistry; especially to the technical field of biomass gasification technology; specifically to the utilization of waste heat The technical field of biomass entrained bed gasification. Background technique

[0002] Plants in biomass are organic substances generated by absorbing carbon dioxide in the air through photosynthesis, which are widely distributed, available in large quantities, and are the only renewable natural raw materials that contain hydrocarbon components and heat energy and can be stored; Substances for energy utilization and chemical production, with CO 2 Characterized by zero emissions. With the decrease of traditional fossil energy reserves and the environmental pollution caused by the use of fossil ene...

Examples

specific Embodiment approach 2

[0107] Implement on the basis of specific implementation mode 1 implementation, such as figure 1 As shown, the top of the high-temperature entrained bed of the three-stage entrained-bed gasifier device is arranged with a down-flow burner, and the carbon powder, pyrolysis gas and oxygen enter the high-temperature en-flow bed through the down-flow burner The gasification reaction is carried out in the high-temperature air-flow bed, the syngas goes down in the high-temperature air-flow bed, enters the high-temperature heat exchanger through the connecting channel formed by the smooth tube membrane water wall on the inner wall, and goes up to cool after being rectified and rectified, and then passes through the inner wall by the smooth tube The connecting channel formed by the membrane water wall enters the low temperature heat exchanger and is rectified by the rectifier and then descends to cool down. The biomass raw material used is still Quercus sp. (see Table 1 in Embodiment 1...

specific Embodiment approach 3

[0114] It is still implemented on the basis of specific implementation mode 1, such as figure 2 As shown, only: the top of the high-temperature entrained bed of the three-stage entrained-bed gasification furnace device is arranged with a down-flow burner, and the carbon powder, pyrolysis gas and oxygen enter the high-temperature air through the down-flow burner The gasification reaction is carried out in the entrained bed, and the synthesis gas descends in the high-temperature entrained bed, enters the high-temperature heat exchanger through rectification and constriction to cool down, and then enters the low-temperature heat exchanger through the connecting channel whose inner wall is composed of a smooth tube membrane water wall And after rectification and necking rectification, it goes up to cool down. The biomass raw material used is still Quercus sp. (see Table 1 in Embodiment 1) as an example, and the main process operating conditions are as in Embodiment 1. The result...

specific Embodiment approach 4

[0121] It is still implemented on the basis of specific implementation mode 1, such as image 3 As shown, only: the lower part of the high-temperature entrained bed of the three-stage entrained-bed gasifier device is arranged with a horizontal burner, and the charcoal powder, pyrolysis gas and oxygen enter the high-temperature air through the horizontal burner. The gasification reaction is carried out in the entrained bed, and the syngas goes up in the high-temperature entrained bed, enters the high-temperature heat exchanger through rectification and constriction, and then enters the low-temperature heat exchanger through the connecting channel formed by the smooth tube membrane water wall on the inner wall and After being rectified by the rectifier, it is cooled downwards. The biomass raw material used is still Quercus sp. (see Table 1 in Embodiment 1) as an example, and the main process operating conditions are as in Embodiment 1. The result obtained through implementation...

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