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Method for relieving coal combustion contamination problem by using modified herbal biomass coke

A technology of biomass coke and coal combustion, which is applied in the field of power plant chemical industry, can solve the problems of strong fly ash and difficult removal by soot blowing device, and achieve the effect of alleviating the pollution problem

Pending Publication Date: 2022-02-08
XIAN THERMAL POWER RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem in the prior art that the fly ash generated during coal combustion is highly viscous and difficult to be removed by a sootblowing device, the present invention provides a method for alleviating coal combustion pollution by using modified herbal biomass coke, which effectively achieves In order to reduce the contamination of coal-fired boiler furnace heating surface

Method used

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  • Method for relieving coal combustion contamination problem by using modified herbal biomass coke

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Effect test

Embodiment 1

[0056] (1) Grinding and sieving the straw to below 200 μm;

[0057] (2) place the straw that has been sieved in a drying device at 35° C. for 24 hours;

[0058](3) According to the size of the corundum porcelain boat, put an appropriate amount of straw into the corundum porcelain boat and place the corundum porcelain boat in the room temperature zone of the reactor filled with nitrogen;

[0059] (4) Set the target temperature of the reactor to 500°C; after the temperature of the reactor rises to 500°C, push the corundum porcelain boat to the target temperature zone of the reactor, and keep it warm at 500°C for 30 minutes;

[0060] (5) After the heat preservation is completed and the reactor is cooled to room temperature, the corundum porcelain boat is taken out to obtain straw biomass coke;

[0061] (6) The citric acid solution of rice straw biomass coke and 4mol / L is mixed in the ratio of 5g:200ml to obtain a solid-liquid mixture;

[0062] (7) After stirring the solid-liqui...

Embodiment 2

[0066] (1) Grinding and sieving the wheat straw to below 200 μm;

[0067] (2) Place the sieved wheat straw in a drying device at 40° C. for 24 hours;

[0068] (3) According to the size of the corundum porcelain boat, put an appropriate amount of wheat straw into the corundum porcelain boat and place the corundum porcelain boat in the room temperature zone of the reactor filled with nitrogen;

[0069] (4) Set the target temperature of the reactor to 650°C; after the temperature of the reactor rises to 650°C, push the corundum porcelain boat to the target temperature zone of the reactor, and keep it warm at 650°C for 20 minutes;

[0070] (5) After the heat preservation is completed and the reactor is cooled to room temperature, the corundum porcelain boat is taken out to obtain wheat straw biomass coke;

[0071] (6) Wheat straw biomass coke is mixed with the acetic acid solution of 2mol / L in the ratio of 10g:200ml to obtain a solid-liquid mixture;

[0072] (7) After stirring t...

Embodiment 3

[0076] (1) Grinding and sieving the corn stalks to less than 200 μm;

[0077] (2) Place the sieved corn stalks in a drying device at 45°C for 24 hours;

[0078] (3) According to the size of the corundum porcelain boat, put an appropriate amount of corn stalks into the corundum porcelain boat and place the corundum porcelain boat in the room temperature zone of the reactor filled with nitrogen;

[0079] (4) Set the target temperature of the reactor to 800°C; after the temperature of the reactor rises to 800°C, push the corundum porcelain boat to the target temperature zone of the reactor, and keep it warm at 800°C for 10 minutes;

[0080] (5) After the heat preservation is completed and the reactor is cooled to room temperature, the corundum porcelain boat is taken out to obtain corn stalk biomass coke;

[0081] (6) Mix corn stalk biomass coke with 1mol / L hydrochloric acid solution in a ratio of 20g:200ml to obtain a solid-liquid mixture;

[0082] (7) After stirring the solid...

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Abstract

The invention provides a method for relieving the problem of coal combustion contamination by using modified herbal biomass char, and the method comprises the following steps: 1, preparing herbal biomass char: grinding and screening herbal biomass, and pyrolyzing the herbal biomass in an inert atmosphere to obtain the herbal biomass char; 2, preparing modified herbal biomass char: performing acid modification operation on the herbal biomass char obtained in the step 1 to obtain the modified herbal biomass char; 3, mixing the modified herbaceous biomass coke obtained in the step 2 with coal, so that the modified herbaceous biomass coke is fully dispersed in the coal for combustion, and the purpose of relieving the problem of coal combustion contamination is achieved. According to the method, the modified herbal biomass coke and coal are mixed for combustion, and the purpose of reducing contamination of the heating surface of the hearth of the coal-fired boiler is effectively achieved.

Description

technical field [0001] The invention relates to the field of chemical engineering in power plants, in particular to a method for alleviating coal combustion pollution by using modified herbal biomass coke. Background technique [0002] During the combustion of coal, a large amount of fly ash will be produced. When the fly ash collides with the heating surface of the furnace, it will adhere to the heating surface of the furnace and form contamination. The formation of contamination on the heating surface of the furnace will not only reduce the heat transfer coefficient of the furnace and reduce the thermal efficiency of the boiler, but also cause more serious consequences such as flue blockage and furnace tube explosion. [0003] Studies have shown that the alkali metal salts of fly ash play a very important role in the formation of fouling. The fly ash particles formed by alkali metal salts have smaller particle size and stronger viscosity, which is easier to Adhere to the ...

Claims

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Application Information

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IPC IPC(8): C10L5/04F23K1/00
CPCC10L5/04C10L5/447F23K1/00F23K2201/501C10L2290/02C10L2290/08C10L2290/24Y02E50/10Y02E50/30
Inventor 王子豪柴胜凯杜保华吴智群赵威黄猛
Owner XIAN THERMAL POWER RES INST CO LTD
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