Formula and production process of high-efficiency environment-friendly fuel

Abstract

The invention discloses a formula and a production process of high-efficiency environment-friendly fuel, and belongs to the technical field of environment-friendly fuel. The invention relates to a formula and a production process of a high-efficiency environment-friendly fuel. The formula of the fuel comprises the following components in mass ratio: high-quality raw coal produced from mirabilis, a biomass material, a composite coupling agent of monopotassium phosphate and sodium humate, a desulfurization and denitrification auxiliary agent compounded by manganese oxide and magnesium hydroxide, and a sodium silicate sintering inhibitor. The production process comprises the steps of raw material pretreatment, mixing and conveying, accurate grinding, drying, screening and powder selecting, packaging and storing and the like, and the fuel performance of each link is ensured by adopting scientific temperature control and time control means. The fuel has the advantages of high calorific value, low ash content, low emission and the like, emission of sulfur and nitrogen oxides is effectively reduced, and environmental pollution is reduced. Through precise proportioning and production process optimization, the combustion efficiency and the fuel stability are improved, and the biomass fuel has good environmental protection and economic benefits, is suitable for large-scale industrial production and has wide market application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental protection fuels, and more specifically, to a formulation and production process of a high-efficiency environmental protection fuel. Background Art

[0002] With the acceleration of the industrialization process, traditional coal fuels are still widely used in fields such as electricity, metallurgy, and building materials. However, conventional coal fuels have many problems during combustion, such as low energy efficiency, high pollutant emissions, and low resource utilization rate. In particular, it is difficult to meet the increasingly strict environmental protection standards in terms of the emission control of SO2, NOx, and particulate matter. Therefore, the research and development of a new type of solid fuel that is efficient, environmentally friendly, and sustainable has become an important topic in the current energy industry.

[0003] Existing environmental protection fuels mostly adopt the synergistic ratio of coal and biomass, supplemented with chemical aids such as desulfurizing agents and denitrifying agents, in order to achieve a balance between calorific value and emissions. However, such fuels still have deficiencies in terms of component uniformity, aid dispersion, and stability. In particular, the synergistic action mechanism between the aids and coal quality is imperfect, resulting in low desulfurization and denitrification efficiency, and problems such as sintering and coking, which affect the combustion efficiency and the safe operation of equipment.

[0004] In addition, the current production processes generally have problems such as high energy consumption, extensive processes, and inaccurate control of particle size, which are not conducive to large-scale industrial promotion and standardized application. Therefore, the development of a new environmental protection fuel formulation and its industrial production process based on high-quality raw coal, compounded with high-efficiency coupling agents and auxiliary functional components, and combined with refined drying, grinding, and screening processes, has become an important direction for the development of solid fuel clean utilization technology. Summary of the Invention

[0005] The purpose of the present invention is to provide a formulation and production process of a high-efficiency environmental protection fuel, which has the advantages of high calorific value, low ash content, and low emissions.

[0006] A formulation of a high-efficiency environmental protection fuel includes the following components by mass ratio: (1) High-quality raw coal produced in Shenmu: 100 parts; (2) Biomass material: 5 - 7.4 parts, and the biomass material is the pulverized product of wood chips; (3) Coupling agent: 7.6 - 10 parts, and the coupling agent is a composite of potassium dihydrogen phosphate and sodium humate; (4) Desulfurization and denitrification aid: 2.6 - 5 parts, and the desulfurization and denitrification aid is a composite of manganese oxide and magnesium hydroxide; (5) Sintering inhibitor: 2.6 - 5 parts, and the sintering inhibitor is sodium silicate.

[0007] Preferably, the steps of preparing the coupling agent are as follows: add deionized water solvent to a reaction container, heat to 48-52°C, slowly add sodium humate under stirring to make it evenly dispersed, slowly add potassium dihydrogen phosphate under stirring, the mass ratio of the three is 11-11.4:1.9-2.1:1, stir the reaction for 20-40 minutes, use vacuum low-temperature drying, control the temperature at 48-60°C, and obtain a coupling agent.

[0008] Preferably, the steps of preparing the desulfurization and denitrification auxiliary agent are as follows: the mass ratio of manganese oxide and magnesium hydroxide in the desulfurization and denitrification auxiliary agent is 0.9-1.1:1, the manganese oxide and magnesium hydroxide are mixed evenly, and crushed to ≤100 mesh to obtain the desulfurization and denitrification auxiliary agent.

[0009] A production process of high-efficiency and environmentally friendly fuel, comprising the following steps: S1, raw material pretreatment section; S2, mixing and conveying section; S3, fine grinding section; S4, drying section; S5, screening and powder selection section; S6, packaging and storage section.

[0010] Preferably, the raw material pretreatment section in step S1 includes the following parts: S1.1, Raw coal processing: crush the high-quality raw coal produced in Shenmu to a particle size of less than 10mm, and dry it in a hot air furnace at a temperature of 220-260℃ for 200-240 minutes; S1.2 Biomass material processing: Crush the wood chips to a particle size of less than 1mm, and dry them in a hot air furnace at a temperature of 80-100℃ for 140-180 minutes.

[0011] Preferably, the mixing and conveying section in step S2 includes the following parts: mixing the pretreated raw coal, biomass, coupling agent, desulfurization and denitrification additive, and sintering inhibitor according to the proportions described in claim 1, and mixing at room temperature for 10-16 minutes using a double-helix ribbon mixer.

[0012] Preferably, the fine grinding section in step S3 includes the following parts: fine grinding the mixed material obtained in step S2 using a vertical mill, the pulverizing wind speed of the vertical mill is 1.0-1.2 m / s, and the fine grinding is performed at 50-70° C. for 28-40 minutes.

[0013] Preferably, the drying section in step S4 includes the following parts: low-temperature drying of the ground material obtained in step S3 at 60-80° C. for 140-180 minutes.

[0014] Preferably, the screening and powder selection section in step S5 includes the following parts: a powder separator is used to separate the dried material obtained in step S4, the rotation speed of the powder separator is 300 - 460 r / min, the material with a particle size of ≤ 200 mesh is sent to the packaging section, and the material with a particle size of > 200 mesh is returned to the vertical mill for further grinding.

[0015] Preferably, the packaging and storage section in step S6 includes the following parts: the qualified material obtained in step S5 is packaged with a sealed moisture-proof packaging bag and stored in a dry and cool environment.

[0016] Compared with the prior art, the advantages of the present invention are as follows: (1) Optimization of fuel performance Taking high-quality raw coal produced in Shenmu as the main body, it ensures the high calorific value, low ash content and good combustibility of the basic fuel, improving the overall energy efficiency; then, an appropriate amount of biomass material (wood chip powder) is compounded to participate in the combustion, which can enhance the combustion reaction rate, reduce carbon emissions and realize the collaborative utilization of resources; after adding the coupling agent, it effectively promotes the combination of the additive and the coal body, improves the uniformity and reaction stability of the fuel components, and enhances the combustion efficiency.

[0017] (2) Superior environmental protection and emission reduction performance By introducing desulfurization and denitrification additives of manganese oxide and magnesium hydroxide, it effectively captures SO2 and NOx generated during the combustion process, and has a high removal efficiency; at the same time, sodium silicate as a sintering inhibitor can significantly reduce the high-temperature coking and sintering phenomena, ensure the safe and stable operation of the combustion chamber, and extend the service life of the equipment.

[0018] (3) Scientific and reasonable formulation structure The compounding ratio and preparation conditions of the coupling agent are optimized, which can improve the dispersion stability and adhesiveness of multi-components; at the same time, the particle size of the additive is controlled to ≤ 100 mesh, which helps to mix evenly with the pulverized coal, and improves the chemical reaction rate and efficiency.

[0019] (4) Fine and efficient process flow Using a hot blast stove for high-temperature pre-drying can effectively reduce the moisture content of the raw coal to below the process requirements and improve the subsequent grinding efficiency; vertical mills are used for fine grinding, and the wind speed and temperature are reasonably controlled, which is conducive to material refinement and thermal control balance, ensuring product stability; a powder separator is used for screening, and the particle size is closed-loop controlled to ensure that the product particle size distribution meets the process requirements, and the unqualified part can be recycled and reground, saving energy and reducing consumption; the whole process adopts room temperature mixing, low-temperature drying and sealed packaging processes to improve the product safety and storage stability. Description of the Drawings

[0020] (1) Figure 1 It is a process flow chart of a high-efficiency environmental protection fuel of the present invention. Detailed Embodiments

[0021] Embodiment 1: S1, Raw material pretreatment section: S1.1, Raw coal processing: crush the high-quality raw coal produced in Shenmu to a particle size of less than 10mm, and dry it in a hot air furnace at a temperature of 220℃ for 200 minutes; S1.2, Biomass material processing: crush the wood chips to a particle size of less than 1mm, dry them in a hot air furnace, control the temperature at 80℃, and dry them for 140 minutes; S1.3, prepare coupling agent: add 110mL deionized water solvent to the reaction container, heat to 48°C, slowly add 19g sodium humate under stirring to make it evenly dispersed, slowly add 10g potassium dihydrogen phosphate under stirring, stir and react for 20 minutes, use vacuum low temperature drying, control the temperature at 48°C, and obtain coupling agent; S1.4. Preparation of desulfurization and denitrification aid: Mix 9g of manganese oxide and 10g of magnesium hydroxide evenly, and crush to ≤100 mesh to obtain a desulfurization and denitrification aid.

[0022] S2, mixing and conveying section: mix 100 parts of pretreated Shenmu high-quality raw coal, 5 parts of biomass materials, 7.6 parts of coupling agent, 2.6 parts of desulfurization and denitrification additives, and 2.6 parts of sintering inhibitor sodium silicate, and use a double-helix ribbon mixer to mix at room temperature for 10 minutes.

[0023] S3, fine grinding stage: use a vertical mill to fine grind the mixed material obtained in step S2, the grinding wind speed of the vertical mill is 1.0 m / s, and the fine grinding is carried out at 50° C. for 28 minutes.

[0024] S4, drying stage: the ground material obtained in step S3 is dried at low temperature at 60° C. for 140 minutes.

[0025] S5, screening and powder selection section: the dried material obtained in step S4 is selected by a powder selection machine, the speed of the powder selection machine is 300r / min, the material ≤200 mesh is sent to the packaging section, and the material >200 mesh is returned to the vertical mill for further grinding.

[0026] S6, packaging and storage section: The qualified materials obtained in step S5 are packaged in sealed moisture-proof packaging bags and stored in a dry and cool environment.

[0027] Embodiment 2: S1, Raw material pretreatment section: S1.1, Raw coal processing: crush the high-quality raw coal produced in Shenmu to a particle size of less than 10mm, and dry it in a hot air furnace at a temperature of 230℃ for 210 minutes; S1.2, Biomass material processing: crush the wood chips to a particle size of less than 1mm, and dry them in a hot air furnace at a temperature of 85°C for 150 minutes; S1.3, prepare coupling agent: add 111mL deionized water solvent to the reaction container, heat to 49°C, slowly add 19.5g sodium humate under stirring to make it evenly dispersed, slowly add 10g potassium dihydrogen phosphate under stirring, stir and react for 25 minutes, use vacuum low temperature drying, control the temperature at 51°C, and obtain coupling agent; S1.4. Preparation of desulfurization and denitrification aid: 9.5 g of manganese oxide and 10 g of magnesium hydroxide are mixed evenly, and crushed to ≤100 mesh to obtain a desulfurization and denitrification aid.

[0028] S2, mixing and conveying section: 100 parts of pretreated high-quality raw coal produced in Shenmu, 5.6 parts of biomass materials, 8.2 parts of coupling agent, 3.2 parts of desulfurization and denitrification additives, and 3.2 parts of sintering inhibitor sodium silicate are mixed, and mixed at room temperature for 12 minutes using a double-helix ribbon mixer.

[0029] S3, fine grinding stage: use a vertical mill to fine grind the mixed material obtained in step S2, the grinding wind speed of the vertical mill is 1.05m / s, and the fine grinding is carried out at 55°C for 31 minutes.

[0030] S4, drying stage: the ground material obtained in step S3 is low-temperature dried at 65° C. for 150 minutes.

[0031] S5, screening and powder selection section: the dried material obtained in step S4 is selected by a powder selector, the speed of the powder selector is 340r / min, the material ≤200 mesh is sent to the packaging section, and the material >200 mesh is returned to the vertical mill for further grinding.

[0032] S6, packaging and storage section: The qualified materials obtained in step S5 are packaged in sealed moisture-proof packaging bags and stored in a dry and cool environment.

[0033] Embodiment 3: S1, Raw material pretreatment section: S1.1, Raw coal processing: crush the high-quality raw coal produced in Shenmu to a particle size of less than 10mm, and dry it in a hot air furnace at a temperature of 240℃ for 220 minutes; S1.2, Biomass material processing: crush the wood chips to a particle size of less than 1mm, dry them in a hot air furnace, control the temperature at 90℃, and dry them for 160 minutes; S1.3, prepare coupling agent: add 112mL deionized water solvent to the reaction container, heat to 50°C, slowly add 20g sodium humate under stirring to make it evenly dispersed, slowly add 10g potassium dihydrogen phosphate under stirring, stir and react for 30 minutes, use vacuum low temperature drying, control the temperature at 54°C, and obtain coupling agent; S1.4. Preparation of desulfurization and denitrification aid: 10.5 g of manganese oxide and 10 g of magnesium hydroxide were mixed evenly, and crushed to ≤100 mesh to obtain a desulfurization and denitrification aid.

[0034] S2, mixing and conveying section: 100 parts of pretreated high-quality raw coal produced in Shenmu, 6.2 parts of biomass materials, 8.8 parts of coupling agent, 3.8 parts of desulfurization and denitrification additives, and 3.8 parts of sintering inhibitor sodium silicate are mixed, and mixed at room temperature for 13 minutes using a double-helix ribbon mixer.

[0035] S3, fine grinding stage: use a vertical mill to fine grind the mixed material obtained in step S2, the grinding wind speed of the vertical mill is 1.1 m / s, and the fine grinding is carried out at 60° C. for 34 minutes.

[0036] S4, drying stage: the ground material obtained in step S3 is dried at low temperature at 70° C. for 160 minutes.

[0037] S5, screening and powder selection section: the dried material obtained in step S4 is selected by a powder selector, the speed of the powder selector is 380r / min, the material ≤200 mesh is sent to the packaging section, and the material >200 mesh is returned to the vertical mill for further grinding.

[0038] S6, packaging and storage section: The qualified materials obtained in step S5 are packaged in sealed moisture-proof packaging bags and stored in a dry and cool environment.

[0039] Embodiment 4: S1, Raw material pretreatment section: S1.1, Raw coal processing: crush the high-quality raw coal produced in Shenmu to a particle size of less than 10mm, and dry it in a hot air furnace at a temperature controlled at 250℃ for 230 minutes; S1.2, Biomass material processing: crush the wood chips to a particle size of less than 1mm, dry them in a hot air furnace, control the temperature at 95℃, and dry them for 170 minutes; S1.3, prepare coupling agent: add 113mL deionized water solvent to the reaction container, heat to 51°C, slowly add 20.5g sodium humate under stirring to make it evenly dispersed, slowly add 10g potassium dihydrogen phosphate under stirring, stir and react for 35 minutes, use vacuum low temperature drying, control the temperature at 57°C, and obtain coupling agent; S1.4. Preparation of desulfurization and denitrification aid: 10.5 g of manganese oxide and 10 g of magnesium hydroxide were mixed evenly, and crushed to ≤100 mesh to obtain a desulfurization and denitrification aid.

[0040] S2, mixing and conveying section: mix 100 parts of pretreated high-quality raw coal produced in Shenmu, 6.8 parts of biomass materials, 9.4 parts of coupling agent, 4.4 parts of desulfurization and denitrification additives, and 4.4 parts of sintering inhibitor sodium silicate, and use a double-helix ribbon mixer to mix at room temperature for 15 minutes.

[0041] S3, fine grinding stage: use a vertical mill to fine grind the mixed material obtained in step S2, the grinding wind speed of the vertical mill is 1.15m / s, and the fine grinding is carried out at 65°C for 37 minutes.

[0042] S4, drying stage: the ground material obtained in step S3 is dried at low temperature at 75° C. for 170 minutes.

[0043] S5, screening and powder selection section: the dried material obtained in step S4 is selected by a powder selector, the speed of the powder selector is 420r / min, the material ≤200 mesh is sent to the packaging section, and the material >200 mesh is returned to the vertical mill for further grinding.

[0044] S6, packaging and storage section: The qualified materials obtained in step S5 are packaged in sealed moisture-proof packaging bags and stored in a dry and cool environment.

[0045] Embodiment 5: S1, Raw material pretreatment section: S1.1, Raw coal processing: crush the high-quality raw coal produced in Shenmu to a particle size of less than 10mm, and dry it in a hot air furnace at a temperature of 260℃ for 240 minutes; S1.2, Biomass material processing: crush the wood chips to a particle size of less than 1mm, dry them in a hot air furnace, control the temperature at 100℃, and dry them for 180 minutes; S1.3, prepare coupling agent: add 114mL deionized water solvent to the reaction container, heat to 52°C, slowly add 21g sodium humate under stirring to make it evenly dispersed, slowly add 10g potassium dihydrogen phosphate under stirring, stir and react for 40 minutes, use vacuum low temperature drying, control the temperature at 60°C, and obtain coupling agent; S1.4. Preparation of desulfurization and denitrification aid: Mix 11g of manganese oxide and 10g of magnesium hydroxide evenly, and crush to ≤100 mesh to obtain a desulfurization and denitrification aid.

[0046] S2, mixing and conveying section: mix 100 parts of pretreated Shenmu high-quality raw coal, 7.4 parts of biomass materials, 10 parts of coupling agent, 5 parts of desulfurization and denitrification additives, and 5 parts of sintering inhibitor sodium silicate, and use a double-helix ribbon mixer to mix at room temperature for 16 minutes.

[0047] S3. Fine Grinding Section: Use a vertical mill to finely grind the mixed materials obtained in step S2. The crushing wind speed of the vertical mill is 1.2 m / s, and the fine grinding is carried out at 70 °C for 40 minutes.

[0048] S4. Drying Section: Carry out low-temperature drying on the ground materials obtained in step S3, and dry at 80 °C for 180 minutes.

[0049] S5. Screening and Powder Selection Section: Use a powder separator to separate the dried materials obtained in step S4. The rotation speed of the powder separator is 460 r / min. Materials with a particle size ≤ 200 mesh are sent to the packaging section, and materials with a particle size > 200 mesh are returned to the vertical mill for continued grinding.

[0050] S6. Packaging and Storage Section: Pack the qualified materials obtained in step S5 with a sealed moisture-proof packaging bag and store them in a dry and cool environment.

[0051] Performance Testing High Calorific Value (Calorific Value) Testing Dry the high-efficiency environmental protection fuel samples obtained in Examples 1 - 5 to constant weight, accurately weigh 1.0 g of the sample, press it into a mold, put it into an oxygen bomb, add 10 mL of distilled water, the oxygen filling pressure of the oxygen bomb: 3.0 MPa, place the oxygen bomb into a calorimeter, the test is carried out automatically, record the final temperature rise value and calculate the calorific value. Ambient temperature: 25 ± 1 °C, relative humidity: ≤ 70%, oxygen purity ≥ 99.5%. The following table shows the test results: Combustion Ash Testing Dry the high-efficiency environmental protection fuel samples obtained in Examples 1 - 5 to constant weight, accurately weigh 1.0 g of the sample, burn it at 850 °C for 40 min to constant weight, heating rate: 10 °C / min, cool and weigh, calculate the ash content. The following table shows the test results: Sulfur Oxide (SO2) and Nitrogen Oxide (NOx) Emission Testing Take 5 g of the high-efficiency environmental protection fuel samples obtained in Examples 1 - 5, place them in a combustion furnace for combustion, combustion temperature: 850 °C, ventilation wind speed: 1.5 m / s, flue gas residence time: 8 s, use a flue gas probe to collect flue gas samples, and read the SO2 and NOx concentration data in real time. The following table shows the test results: Combustion Residual Carbon Rate Testing Dry the high-efficiency environmental protection fuel samples obtained in Examples 1 - 5 to constant weight, accurately weigh 1.0 g of the sample, control the temperature at 900 °C for complete combustion, cool and weigh the remaining residue, calculate the residual carbon rate. The following table shows the test results: Volatile content test Dry the high-efficiency environmental protection fuel samples obtained in Examples 1-5 to constant weight, accurately weigh 1.0 g of the sample, heat it at 900 ± 10 °C for 7 minutes, and calculate the proportion of the weight loss part, which is the volatile matter. The following table shows the test results:

Claims

1. A formula for a high-efficiency and environmentally friendly fuel, characterized in that, The components include the following by mass ratio: (1) Shenmu high-quality raw coal: 100 parts; (2) Biomass material: 5-7.4 parts, wherein the biomass material is crushed sawdust; (3) Coupling agent: 7.6-10 parts, wherein the coupling agent is a compound of potassium dihydrogen phosphate and sodium humate; (4) Desulfurization and denitrification aid: 2.6-5 parts, wherein the desulfurization and denitrification aid is a composite of manganese oxide and magnesium hydroxide; (5) Sintering inhibitor: 2.6-5 parts, wherein the sintering inhibitor is sodium silicate.

2. The formulation of a high-efficiency environmental protection fuel according to claim 1, characterized in that, The steps of preparing the coupling agent are as follows: add deionized water solvent to a reaction container, heat to 48-52°C, slowly add sodium humate under stirring to make it evenly dispersed, slowly add potassium dihydrogen phosphate under stirring, the mass ratio of the three is 11-11.4:1.9-2.1:1, stir the reaction for 20-40 minutes, use vacuum low-temperature drying, control the temperature at 48-60°C, and obtain the coupling agent.

3. The formulation of a high-efficiency environmental protection fuel according to claim 1, characterized in that, The steps of preparing the desulfurization and denitrification auxiliary agent are as follows: the mass ratio of manganese oxide and magnesium hydroxide in the desulfurization and denitrification auxiliary agent is 0.9-1.1:1, the manganese oxide and magnesium hydroxide are evenly mixed, and crushed to ≤100 mesh to obtain the desulfurization and denitrification auxiliary agent.

4. A production process of a high-efficiency environmental protection fuel, characterized in that, The steps include: S1, raw material pretreatment section; S2, mixing and conveying section; S3, fine grinding section; S4, drying section; S5, screening and powder selection section; S6, packaging and storage section.

5. The production process of a high-efficiency environmental protection fuel according to claim 4, characterized in that: The raw material pretreatment section in step S1 includes the following parts: S1.1, Raw coal processing: crush the high-quality raw coal produced in Shenmu to a particle size of less than 10mm, and dry it in a hot air furnace at a temperature of 220-260℃ for 200-240 minutes; S1.2, Biomass material processing: Crush the wood chips to a particle size of less than 1mm, and dry them in a hot air furnace at a temperature of 80-100℃ for 140-180 minutes.

6. The production process of a high-efficiency environmental protection fuel according to claim 4, characterized in that: The mixing and conveying section in step S2 includes the following parts: mixing the pretreated raw coal, biomass, coupling agent, desulfurization and denitrification additive, and sintering inhibitor according to the proportions of claim 1, and mixing at room temperature for 10-16 minutes using a double-helix ribbon mixer.

7. The production process of a high-efficiency environmental protection fuel according to claim 4, characterized in that: The fine grinding section in step S3 includes the following parts: fine grinding the mixed material obtained in step S2 using a vertical mill, the pulverizing wind speed of the vertical mill is 1.0-1.2 m / s, and the fine grinding is performed at 50-70° C. for 28-40 minutes.

8. The production process of a high-efficiency environmental protection fuel according to claim 4, characterized in that: The drying section in step S4 includes the following parts: low-temperature drying of the ground material obtained in step S3 at 60-80° C. for 140-180 minutes.

9. The production process of a high-efficiency environmental protection fuel according to claim 4, characterized in that: The screening and powder selection section in step S5 includes the following parts: the dried material obtained in step S4 is selected by a powder selection machine, the rotation speed of the powder selection machine is 300-460r / min, the material ≤200 mesh is sent to the packaging section, and the material >200 mesh is returned to the vertical mill for further grinding.

10. The production process of a high-efficiency environmental protection fuel according to claim 4, characterized in that: The packaging and storage section in step S6 includes the following parts: the qualified materials obtained in step S5 are packaged in sealed moisture-proof packaging bags and stored in a dry and cool environment.

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