Additive for reducing contamination problem in biomass combustion process and use method

A combustion process and biomass technology, applied in the directions of fuel additives, biofuels, waste fuels, etc., can solve the problems of strong adhesion of biomass combustion fouling ash, reduced heat transfer coefficient of heating surface, and blocked flue, etc. Strong flexibility and adaptability to fuel types, strong high-temperature adsorption capacity, and low cost of transformation

Pending Publication Date: 2021-12-10
XIAN THERMAL POWER RES INST CO LTD
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AI Technical Summary

Problems solved by technology

In general, the contamination of the heating surface of the furnace will lead to problems such as a decrease in the thermal efficiency of the boiler, a decrease in the heat transfer coefficient of the heating surface, and blockage of the flue.
[0004] Soot blowing devices are commonly used in existing boiler systems to alleviate the contamination of the heating surface of the furnace, but due to the strong adhesion of biomass burning contaminated ash, the effect of this method is not ideal
At present, the academic circles often use methods such as adding coatings to the heating surface of the furnace, mixing coal and adding kaolin to alleviate the pollution caused by biomass combustion, but these methods are often limited to laboratories due to economical and feasibility reasons. In the research stage, industrialized large-scale utilization has not been carried out, so it is necessary to find a means to alleviate the pollution problem of biomass burning with better effect and potential for industrialized utilization

Method used

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  • Additive for reducing contamination problem in biomass combustion process and use method
  • Additive for reducing contamination problem in biomass combustion process and use method
  • Additive for reducing contamination problem in biomass combustion process and use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Disperse biomass ash from a domestic biomass power plant in a ratio of 10g:300ml in a hydrochloric acid solution with a concentration of 4mol / L to obtain a solid-liquid mixture;

[0047] Stir the solid-liquid mixture at a temperature of 70°C for 6 hours;

[0048] The stirred solid-liquid mixture is placed in a filter device to filter, and the biomass ash on the filter screen is rinsed with deionized water until the Cl of the solution in the filter device - If the concentration is less than 0.01mol / L, dry the biomass ash on the filter in an oven at 35°C, grind and sieve to 50-75μm to obtain modified biomass ash;

[0049] Grinding and sieving calcium carbonate and magnesium carbonate to 75-100 μm respectively;

[0050] According to the composition analysis of straw ash in Table 1, the modified biomass ash, calcium carbonate and magnesium carbonate were put into the stirring device according to the mass ratio of 0.3:0.35:0.35. Additives to reduce pollution from biomass b...

Embodiment 2

[0056] Disperse biomass ash from a domestic biomass power plant in a ratio of 30g:300ml in a hydrochloric acid solution with a concentration of 8mol / L to obtain a solid-liquid mixture;

[0057] Stir the solid-liquid mixture at a temperature of 100°C for 8 hours;

[0058] The stirred solid-liquid mixture is placed in a filter device to filter, and the biomass ash on the filter screen is rinsed with deionized water until the Cl of the solution in the filter device - If the concentration is less than 0.01mol / L, dry the biomass ash on the filter in an oven at 45°C, grind and sieve to 50-75μm to obtain modified biomass ash;

[0059] Grinding and sieving calcium carbonate and magnesium carbonate to 75-100 μm respectively;

[0060] According to the composition analysis of camphor wood ash in Table 2, the modified biomass ash, calcium carbonate and magnesium carbonate were put into the stirring device according to the ratio of mass ratio 0.8:0.1:0.1, the rotating speed of the stirrin...

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Abstract

The invention provides an additive for reducing contamination problem in biomass combustion process and a use method. The additive is prepared from modified biomass ash, calcium carbonate and magnesium carbonate, and the prepared additive is diversified in adsorption mechanism, by adjusting the adding proportion of the three components in the preparation process, the additive has relatively high flexibility and fuel type adaptability; meanwhile, the additive prepared by the preparation method disclosed by the invention has better high-temperature adsorption capacity and is not easy to inactivate at a high temperature; compared with other methods for restraining the biomass combustion contamination problem, the biomass power plant has the advantages that the biomass ash generated through self combustion plays a strong adsorption role, and meanwhile the effect of recycling the biomass ash can be achieved.

Description

technical field [0001] The invention relates to the technical field of biomass boiler operation, in particular to an additive for reducing pollution during biomass combustion and a use method thereof. Background technique [0002] Biomass is a green, renewable, carbon dioxide-neutral energy source. Biomass has the advantages of low cost, easy availability and huge reserves. Large-scale direct combustion of biomass for power generation is an effective means of utilizing biomass. At the same time, it can relieve the pressure of carbon dioxide emission reduction on the side of coal-fired power generation, and promote the realization of the goal of "carbon peaking and carbon neutrality". Another On the one hand, the content of N and S elements in biomass is low, and it releases less sulfur oxides and nitrogen oxides during the combustion process, which can reduce the formation of extreme weather such as acid rain. [0003] In the process of direct combustion of biomass for powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/02C10L5/44
CPCC10L10/02C10L5/44Y02E50/10Y02E50/30
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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