Device and method for power generation and carbon co-production by using biomass gasification coupling coal-fired unit

A technology of coal-fired units and biomass charcoal, which is applied in the direction of gasification process, granular/powdered fuel gasification, and production of combustible gas. value, high-efficiency power generation, and the effect of increasing carbon content

Pending Publication Date: 2019-01-08
HEFEI DEBO BIOENERGY SCI & TECH
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Problems solved by technology

However, most of the existing biomass gasification coupled power generation technologies convert biomass into gas to the greatest extent through efficient gasification, and the fixed carbon in b

Method used

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  • Device and method for power generation and carbon co-production by using biomass gasification coupling coal-fired unit
  • Device and method for power generation and carbon co-production by using biomass gasification coupling coal-fired unit
  • Device and method for power generation and carbon co-production by using biomass gasification coupling coal-fired unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The biomass coupling power generation power is 30MW, and the power supply coal consumption of power station unit 7 last year was 305g / kW.h. The biomass raw material used is corn straw with a moisture content of 35%, and the impurity content is 3%. The corn straw consumption per hour is 36.65t / h .

[0053] Under the auxiliary fluidization of the bed material in the furnace 201, corn stalks undergo gasification reaction to generate high-temperature biomass gas and biomass charcoal. The air volume required for gasification is 31500Nm 3 / h, the air temperature is 400°C, 1.3t / h of steam with a temperature of 600°C enters from the air chamber 203, and 1.1t / h of steam with a temperature of 230°C is injected from the speed-regulating steam inlet, and the high-temperature biomass gas carries biomass The charcoal enters the inertial separator 401 after passing through the efficiency adjustment device 3 for gas-solid separation. Under the centrifugal force, the large-particle biom...

Embodiment 2

[0058] The biomass coupled power generation power is 40MW, and the power supply coal consumption of power station unit 4 last year was 275g / kW.h. The biomass raw material used is wood chips with a moisture content of 15%, and the impurity content is 1.2%. The wood chips consumed per hour are 33.07t / h.

[0059] Sawdust undergoes gasification reaction under the auxiliary fluidization of the bed material in the furnace 201 to generate high-temperature biomass gas and biomass charcoal, and the air volume required for gasification is 26300Nm 3 / h, the air temperature is 300°C, 2.7t / h of steam with a temperature of 400°C enters from the air chamber 203, and 2.1t / h of steam with a temperature of 220°C is injected from the speed-regulating steam inlet, and the high-temperature biomass gas carries biomass The charcoal enters the inertial separator 401 after passing through the efficiency adjustment device 3 for gas-solid separation. Under the centrifugal force, the large-particle biomas...

Embodiment 3

[0064] The biomass coupling power generation power is 24MW, and the power supply coal consumption of the power station unit 7 in the previous year was 356g / kW.h. The biomass raw material used is rice husk with a moisture content of 13%, and the impurity content is 4.5%. The rice husk consumption is 34.23t / h per hour .

[0065] The rice husk undergoes a gasification reaction under the auxiliary fluidization of the bed material in the furnace 201 to generate high-temperature biomass gas and biomass charcoal, and the air volume required for gasification is 28300Nm 3 / h, the air temperature is 350°C, 2.1t / h of steam with a temperature of 500°C enters from the air chamber 203, and 1.7t / h of steam with a temperature of 260°C is injected from the speed-regulating steam inlet, and the high-temperature biomass gas carries biomass The charcoal enters the inertial separator 401 after passing through the efficiency adjustment device 3 for gas-solid separation. Under the centrifugal force,...

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Abstract

The invention provides a device for power generation and carbon co-production by using a biomass gasification coupling coal-fired unit. The device comprises a fluidized bed gasifier, wherein a raw material feeding device is arranged on one side of the fluidized bed gasifier; an inertia separation device is connected with a fuel gas outlet in the upper end of the fluidized bed gasifier; the outletof the inertia separation device is connected with a cyclone separator through a pipeline; a waste heat recycling device is connected with one side of the cyclone separator; a power station unit is arranged on one side of the waste heat recycling device; and a carbon cooling device is arranged at the outlet in the lower end of the cyclone separator. By multiple technical means of air preheating, steam dilution/adjustment, steam speed adjustment and flue gas speed adjustment, the quality of biomass carbon is ensured while efficient coupling power generation of biomass is ensured, and by using an efficiency adjusting device, the yield of the biomass carbon can be flexibly adjusted according to market values of the biomass carbon, and value maximization can be achieved.

Description

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Claims

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Application Information

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Owner HEFEI DEBO BIOENERGY SCI & TECH
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