阅读说明：本技术 一种生物质燃料浆及其制备方法 (Biomass fuel slurry and preparation method thereof ) 是由 汪洋 周俊虎 刘树刚 文光旭 张永亮 潘宏春 于 2018-08-01 设计创作，主要内容包括：本发明提供一种生物质燃料浆及其制备方法,其特征在于：包括以下步骤；1)生物质加热干燥,粉碎成生物质粉末；2)生物质粉末中加入酸性溶液加热处理,后加入碱性溶液中和酸性,获得生物质分散液；3)生物质分散液中加入水搅拌均匀,80℃烘箱中水热法加热2小时；4)然后依次加入甲醛、亚硫酸钠、亚油酸、烷基磷羧酸盐,待搅拌均匀后保持温度继续反应即得所述生物质燃料浆。该制备方法制备得到的生物质燃料浆具有良好的流动性和稳定性。(The invention provides biomass fuel slurry and a preparation method thereof, and is characterized in that: comprises the following steps; 1) heating and drying the biomass, and crushing the biomass into biomass powder; 2) adding an acidic solution into the biomass powder, heating, and then adding an alkaline solution to neutralize acidity to obtain a biomass dispersion liquid; 3) adding water into the biomass dispersion liquid, uniformly stirring, and heating for 2 hours in an oven at 80 ℃ by a hydrothermal method; 4) and then sequentially adding formaldehyde, sodium sulfite, linoleic acid and alkyl phosphate carboxylate, uniformly stirring, and keeping the temperature to continuously react to obtain the biomass fuel slurry. The biomass fuel slurry prepared by the preparation method has good fluidity and stability.)

1. A preparation method of biomass fuel slurry is characterized by comprising the following steps: comprises the following steps;

1) heating and drying the biomass, and crushing the biomass into biomass powder;

2) adding an acidic solution into the biomass powder, heating, adding an alkaline solution to neutralize acidity, and reacting with carbon elements in the biomass powder to generate potassium carbonate and hydrogen to obtain dissociated porous biomass dispersion liquid;

3) adding water into the biomass dispersion liquid, uniformly stirring, and heating for 2 hours in an oven at 80 ℃ by a hydrothermal method;

4) then adding formaldehyde with the mass concentration of 5%, continuing to react for 1 hour, and then adding sodium sulfite with the mass concentration of 10% to generate lignosulfonate; after the charging is finished, preserving the heat for 1 hour; continuously heating to 90 ℃, adding linoleic acid with the mass concentration of 20% and alkyl phosphate carboxylate with the mass concentration of 5%, uniformly stirring, keeping the temperature, continuously reacting for 3 hours, cooling and discharging to obtain the biomass fuel slurry; wherein the proportion of the biomass dispersion liquid, the formaldehyde, the sodium sulfite, the linoleic acid and the alkyl phosphate carboxylate is 80-82:1-2:2-3:2-3:1-2, preferably 80:2:2:3: 1.

2. The method of producing a biomass fuel slurry as claimed in claim 1, characterized in that: in the step 2), the ratio of the biomass powder to the acidic solution and the alkaline solution is 1-2: 9-11: 9-11, preferably 1:10: 10.

3. The method of producing a biomass fuel slurry as claimed in claim 1, characterized in that: the acid solution is oxalic acid solution with the mass fraction of 8%, and the concentration is 1 g/ml.

4. The method of producing a biomass fuel slurry as claimed in claim 1, characterized in that: the alkaline solution is 1g/ml of potassium hydroxide.

5. The method of producing a biomass fuel slurry as claimed in claim 1, characterized in that: the biomass is agricultural waste biological material.

6. The method of producing a biomass fuel slurry as claimed in claim 1, characterized in that: the particle size of the powder in the step 1) is 100 meshes.

7. The method of producing a biomass fuel slurry as claimed in claim 1, characterized in that: in the step 1), the biomass is put into a muffle furnace at the temperature of 150-180 ℃ for continuous heating for 6 hours, and then cooled to room temperature for drying.

8. The method of producing a biomass fuel slurry as claimed in claim 1, characterized in that: in the step 2), the heating treatment of the acid solution is that the biomass powder reacts in the acid solution at 180-200 ℃ for 2 hours.

9. The method of producing a biomass fuel slurry as claimed in claim 1, characterized in that: in the step 3), water is added into the biomass dispersion liquid for stirring, and after heating and temperature rising are started, ultrasonic dispersion is firstly adopted for 10-30 minutes, so that the biomass powder is uniformly dispersed, and then hydrothermal heating is carried out.

10. A biomass fuel slurry produced by the production method according to any one of claims 1 to 9.

Technical Field

The invention relates to a fuel slurry prepared by using biomass as a main raw material and a preparation method thereof.

Background

The medium coal which is always consumed in China as primary energy is consumed by about 72 percent, and the energy consumption structure of China still mainly uses coal in a quite long time. With the increasing environmental demands, there is an urgent need for a clean fuel.

China is a big agricultural country, and forest resources are rich, so that a large amount of agricultural and forestry wastes such as shells, straws and wood chips are generated, and the utilization of the renewable biological wastes as fuels is an effective green energy mode.

The biomass is a hydrophobic substance after being pretreated by drying and crushing, has fine granularity and large specific surface area, and is difficult to be closely combined with water to form slurry. And is easily separated from water due to its density difference with water. Good rheology and stability are the most important properties of biomass pulp, and how to make biomass pulp have good fluid properties becomes a problem to be solved by technicians.

Disclosure of Invention

A first object of the present invention is to overcome the disadvantages of the prior art and to provide a biomass fuel slurry with good rheological properties and stability. The biomass fuel slurry has the characteristics of low pollution, convenience in pumping, atomizing and burning and the like, the combustion efficiency and the boiler thermal efficiency are high, and the boiler combustion load adjusting range is wide. In addition, because the exhaust gas temperature is low, the emission of nitrogen oxides can be effectively reduced, the desulfurization is easy, the environment is protected, the energy is saved, and the storage is safe, so that the fuel is an ideal fuel for replacing coal and oil.

The second purpose of the invention is to provide a preparation method of biomass fuel slurry, which has no discharge of three wastes in the preparation process and is environment-friendly, pollution-free and clean production.

The technical scheme adopted by the invention for solving the problems is as follows:

a preparation method of biomass fuel slurry is characterized by comprising the following steps: comprises the following steps;

1) heating and drying the biomass, and crushing the biomass into biomass powder;

2) adding an acidic solution into the biomass powder, heating, adding an alkaline solution to neutralize acidity, and reacting with carbon elements in the biomass powder to generate potassium carbonate and hydrogen to obtain dissociated porous biomass dispersion liquid;

3) adding water into the biomass dispersion liquid, uniformly stirring, and heating for 2 hours in an oven at 80 ℃ by a hydrothermal method;

4) then adding formaldehyde with the mass concentration of 5%, continuing to react for 1 hour, and then adding sodium sulfite with the mass concentration of 10% to generate lignosulfonate; after the charging is finished, preserving the heat for 1 hour; continuously heating to 90 ℃, adding linoleic acid with the mass concentration of 20% and alkyl phosphate carboxylate with the mass concentration of 5%, uniformly stirring, keeping the temperature, continuously reacting for 3 hours, cooling and discharging to obtain the biomass fuel slurry; wherein the proportion of the biomass dispersion liquid, the formaldehyde, the sodium sulfite, the linoleic acid and the alkyl phosphate carboxylate is 80-82:1-2:2-3:2-3:1-2, preferably 80:2:2:3: 1.

The additives such as formaldehyde, sodium sulfite, linoleic acid, alkyl phosphate carboxylate and the like have the main effects of changing the surface properties of the biomass particles through the adsorption effect on the surfaces of the biomass particles, so that the stability and rheological property of the suspension system are improved, and the biomass fuel slurry has good fluidity and stability.

Further, in the step 2), the ratio of the biomass powder to the acidic solution and the alkaline solution is 1-2: 9-11: 9-11, preferably 1:10: 10.

Further, the acid solution is oxalic acid solution with the mass fraction of 8 percent,

further, the alkaline solution is 1g/ml of potassium hydroxide.

Further, the biomass is agricultural waste biological material.

Further, the particle size of the powder in the step 1) is 100 meshes.

Further, in the step 1), the biomass is placed into a muffle furnace at the temperature of 150-180 ℃ for continuous heating for 6 hours, and then cooled to room temperature for drying.

Further, in the step 2), the heating treatment of the acid solution is that the biomass powder reacts in the acid solution at 180-200 ℃ for 2 hours.

Further, in the step 3), water is added into the biomass dispersion liquid for stirring, and after heating and temperature rising are started, ultrasonic dispersion is firstly adopted for 10-30 minutes, so that the biomass powder is uniformly dispersed, and then hydrothermal heating is carried out.

A biomass fuel slurry is prepared by the preparation method.

The invention has the beneficial effects that:

1. the invention selects the waste biomass for preparation, can reduce the production cost of the high-performance biomass fuel slurry, directly and effectively utilizes the loose porous structure in the waste biomass material, and plays a role in recycling waste resources.

2. The invention selects the waste biomass with environmental pollution influence to prepare the biomass fuel slurry, can efficiently utilize waste resources, plays a role in energy conservation and environmental protection, and can provide a new green and environmental-friendly development route for the treatment of three wastes.

3. The invention has simple production process and mild conditions, the feeding and the conditions in the production process are easy to control, the product is non-toxic and harmless, the use is not limited by seasons and regions, the transportation and the storage are convenient, and compared with the common biomass fuel, the invention can use an oil-fired boiler.

4. Various additives are used to achieve the purpose of chemical modification. The prepared product has carboxyl, sulfonic group and other anionic groups, so that the prepared biomass fuel slurry can adapt to more raw materials, and the prepared biomass fuel slurry has the characteristics of good stability and excellent fluidity.

5. The invention uses biomass to prepare biomass fuel slurry, has no discharge of three wastes in the whole process, and is a green, environment-friendly, pollution-free and clean production process.

Detailed Description

The present invention will be described in further detail with reference to specific examples.