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

Abstract

The invention discloses a biomass three-section type entrained flow bed gasification technology with the function of waste heat utilization, which relates to the technical field of energy chemical technology. The gasification technology is realized in a way that: carbon powder, pyrolysis gas and oxygen, which are generated after the biomass is pyrolyzed, enter an entrained flow bed to obtain synthetic gas through gasification, and the energy of the gasification waste heat is transferred to water by a heat exchanger of a gasifier, thereby producing superheated steam. The gasifier of the entrained flow bed is divided into a high-temperature entrained flow bed section, a high-temperature heat exchanger section and a low-temperature heat exchanger section, wherein the high-temperature entrained flow bed section adopts a dry ash extraction entrained flow bed gasification technology, and the temperature of the synthetic gas at the outlet is 1280-1320 DEG C; at the high-temperature heat exchanger section, the temperature of the synthetic gas at the inlet is 1280-1320 DEG C, the temperature at the outlet is 580-600 DEG C, a shock chamber and a high-temperature superheater are arranged in the high-temperature heat exchanger section, and the synthetic gas enters the shock chamber at the temperature of 1000-1100 DEG C and leaves at the temperature of 700-800 DEG C; and at the low-temperature heat exchanger section, the temperature of the synthetic gas at the inlet is 580-600 DEG C, the temperature of the synthetic gas at the outlet is 220-230 DEG C, and a low-temperature superheater and a coal economizer are arranged in the low-temperature heat exchanger section. The invention is used for high-efficiency gasification of biomass.

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 entrained gasifier 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 obta...

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 entrained gasifier 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 obta...

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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