Environment-friendly biomass composite fuel prepared from sludge garbage and preparation method of environment-friendly biomass composite fuel

Abstract

The invention relates to an environment-friendly biomass composite fuel prepared from sludge garbage and a preparation method of the environment-friendly biomass composite fuel. The environment-friendly biomass composite fuel is prepared from a biomass raw material, sludge garbage, fire coal, a combustion improver, a catalyst, a desulfuration nitrogen fixing agent, a stabilizer and a dust and harm removal agent. The environment-friendly biomass composite fuel prepared from the sludge garbage has the advantages of quick ignition, strong combustion fire, long combustion resistance, full combustion, high temperature, less dust and the like; meanwhile, under the action of prepared reagents, discharge of toxic and harmful substances is effectively eliminated, and the environmental pollution is avoided; furthermore, combustion is stable and heat is uniformly distributed, so as to prevent slagging of a boiler, prolong the service life of the boiler and reduce the operation cost; particularly in a preparation process, by the combination of the component proportion of the raw materials and a preparation technology which are preferred according to an actual working condition of the boiler, the combustion performance condition can be adjusted, the boiler can realize full-load efficient operation, and the heat efficiency of the boiler and the fuel heat use efficiency are improved; the environment-friendly biomass composite fuel is applicable to being used in a civil boiler and an industrial boiler.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly new energy, and relates to the preparation of environment-friendly biomass composite fuel from sludge waste and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy and the acceleration of urbanization, the output of urban sludge waste has increased. Since sludge waste contains harmful substances such as heavy metals and pathogenic microorganisms, if it is not properly disposed of, it will bring serious secondary pollution to the environment. secondary pollution, while occupying a large amount of land resources. According to reports, the current status of sludge waste disposal in my country is more than 70% discarded, nearly 20% landfilled, followed by less than 10% composted for agriculture or planting forests, and a small amount of sludge dried and incinerated. Some disadvantages of traditional sludge treatment technology hav...

AI Technical Summary

Problems solved by technology

The mixing ratio of the application is unreasonable. Only sewage plant sludge, coal powder, and crop straw are used as a single raw material type, which lacks more raw material application fields. If the coal-fired raw material ratio is 10-30%, the heat energy is low, which is not conducive to The use of civil and industrial boilers, etc., and the calorific value and sulfur content of the coal-fired quality are not clear, the lack of a reasonable ratio of raw material compound components, and the use of crop straw ratio of 40-50%, resulting in non-combustible fuel and low heat energy , strong volatility and other factors cause smoke and dust emissions; the production process has not been processed by raw material wheel rolling, fermentation treatment, etc., and the lack of full use of the material production of the raw material itself and the complementary and synergistic effect between the raw materials. In addition, the coalification agent is selected from Sodium nitrate, sodium hydroxide, sodium oxalate, such light sodium oxides have low thermal stability, which will further enhance the ignition rate, cause the fuel to be non-combustible, reduce the heat energy of the fuel, and increase the combustion volatility and smoke emission; Moreover, acidic oxides such as carbonic acid, nitric acid, and oxalic acid are not conducive to acidic oxides SO compared with alkaline hydroxides. 2 , NO 2 The reaction will lead to harmful gas emissions. At the same time, if there is no addition of iron oxides, it will easily cause slagging on the furnace wall and lack of consideration of the nitrogen, phosphorus, and potassium components contained in the slag, which are more conducive to resource utilization.

[0007] In addition, the patent application number CN 201210215416.6, the title of the invention is sludge-straw-raw coal-based biomass fuel and its preparation method and the application of fuel slag. -3% quicklime stone will increase the manufacturing process and cost of the sludge drying treatment process; the added aluminum salt coagulant will cause the fuel slag to have aluminum ion components, which is not conducive to wider resource utilization, and the added quicklime Increased inorganic components and the total amount of sludge, did not achieve the harmless and reduction of sludge

In this application, the mass ratio of sludge, straw, and raw coal is mixed and pressed at a ratio of 1:1:1. The mixing ratio is not reasonable, and only the sewage plant sludge, straw, and raw coal are used as a single raw material, lacking more The application range of raw materials, and the sulfur content of raw coal is not clearly selected, lacks a reasonable compounding ratio of raw materials, lacks combustion aids, catalysts and other additives to adjust and optimize fuel performance, and cannot ensure combustion performance and thermal efficiency. and the regulation and control of pollutant emissions; there is a lack of scientific consideration of the complementary and synergistic effects between raw materials and between raw materials and conditioning aids to optimize the ratio of reasonable compound components, especially without considering the complementary and synergistic effects of conditioning aids and synergistic fuel efficiency, in which only the added quicklime has general oxidation, catalysis and desulfurization and nitrogen fixation effects, especially in terms of desulfurization and nitrogen fixation effects, acidic oxides such as limestone and aluminum salts are not conducive to acidic oxides SO 2 , NO 2 The reaction will lead to the total discharge of harmful gas pollutants, and limestone and aluminum salts have high thermal stability during fuel combustion, resulting in slow ignition of fuel, weak combustion flame, weak firepower, insufficient combustion, and insufficient temperature Higher causes lead to the production of toxic substances such as dioxin, which is not conducive to the purpose of protecting the environment