A coal gangue-containing biofuel particle and a preparation method and application thereof

Abstract

The present application relates to coal gangue treatment technical field, provide a kind of coal gangue-containing biofuel particle and its preparation method and application.The biofuel particle provided by the present application includes: coal gangue powder 60~62%;14~15% of oil-stained mixture;High molecular waste powder 24~26%;The oil-stained mixture is waste engine oil and / or oil-stained material;The oil-stained material is obtained by crushing and drying in turn from swill.The oil-stained mixture used in the present application is rich in oil and fat, with high volatile matter, easy to ignite, coal gangue and waste tires and / or waste plastic bottles have high fixed carbon content, long burning time, so that the biofuel particle of the present application has high calorific value, stable combustion, can be used as alternative fuel to alleviate the problem of traditional fossil fuel shortage.The present application uses catering leftovers swill, waste tires and / or waste plastic bottles and coal gangue powder, to prepare biofuel particles, which solves the various hazards caused by long-term storage of coal gangue.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal gangue treatment, and particularly relates to a coal-gangue-containing biofuel particle and a preparation method and application thereof. BACKGROUND

[0002] Coal gangue is a solid waste produced in the process of coal mining, and a large amount of coal gangue is long-term stacked to form a coal gangue hill, which occupies land resources. Coal gangue is very harmful to the natural environment. On the one hand, coal gangue can form fine dust in the stacking process, which can be suspended in the atmosphere under the action of wind and cause harm to human health. On the other hand, coal gangue is prone to spontaneous combustion, and after combustion, it releases a variety of harmful gases and produces a large amount of explosive smoke, so it will cause different degrees of influence on the surrounding atmospheric environment and plant growth when it is spontaneously combusted. In addition, harmful elements in coal gangue can dissolve into water or soil environment under the action of rain during the stacking process, causing damage to nutrients in the soil, and in severe cases, causing acidification of the land around the coal gangue hill, affecting human health and vegetation growth. In summary, long-term stacking of coal gangue is harmful, and it is urgent to properly handle it. SUMMARY

[0003] In view of the above problems, the present application aims to provide a coal-gangue-containing biofuel particle and a preparation method and application thereof. The biofuel particle provided by the present application comprises coal gangue powder, an oil-stained mixture and high molecular waste, and has high calorific value, which can realize effective utilization of coal gangue.

[0004] In order to achieve the above-mentioned application purposes, the present application provides the following technical solutions:

[0005] The present application provides a coal-gangue-containing biofuel particle, which comprises the following components in mass percentage:

[0006] 60-62% of coal gangue powder;

[0007] 14-15% of an oil-stained mixture;

[0008] 24-26% of high molecular waste powder;

[0009] In mass percentage, the sulfur content in the coal gangue powder is 4.2-9%, the total water content is 5.0-6.5%, the ash content is 58-78%, the volatile content is 5.5-11%, and the fixed carbon content is 16-20.5%;

[0010] The oil-stained mixture is waste engine oil and / or oil-stained material;

[0011] The oil-stained material is obtained by pulverizing and drying hogwash in sequence;

[0012] The polymer waste powder is obtained by crushing waste tires and / or waste plastic bottles.

[0013] Preferably, the coal gangue powder is obtained by drying and crushing the coal gangue in sequence; the mesh number of the coal gangue powder is 300-400 mesh.

[0014] Preferably, the mesh number of the polymer waste powder is 300-450 mesh.

[0015] Preferably, the diameter of the coal-gangue-containing biofuel particle is 8-10 mm, the length is 12-15 mm, and the density is 1.76-2 g / cm 3 .

[0016] Preferably, in the coal-gangue-containing biofuel particle, the sulfur content is 0.8-2.37% by mass fraction, the total water content is 1.9-3.23%, the ash content is 22.65-32.2%, the total volatile content is 28.25-46.3%, and the fixed carbon content is 26.7-41.33%.

[0017] Preferably, the calorific value of the coal-gangue-containing biofuel particle is 3786-5036 kcal / kg.

[0018] The application further provides a preparation method of the coal-gangue-containing biofuel particle.

[0019] The coal-gangue-containing biofuel particle is obtained by granulating the mixture of the coal gangue powder, the oil-stained mixture, and the polymer waste powder.

[0020] The application further provides an application of the coal-gangue-containing biofuel particle as a power generation fuel.

[0021] The application provides a coal gangue-containing biofuel particle, which comprises the following components in percentage by mass: coal gangue powder 60-62%; oil-stained mixture 14-15%; high-molecular waste powder 24-26%; the sulfur content in the coal gangue powder is 4.2-9% by mass percentage, the total water content is 5.0-6.5%, the ash content is 58-78%, the volatile content is 5.5-11%, and the fixed carbon content is 16-20.5%; the oil-stained mixture is waste engine oil and / or oil-stained material; the oil-stained material is obtained by sequentially crushing and drying swill; and the high-molecular waste powder is obtained by crushing waste tires and / or waste plastic bottles. The oil-stained mixture used in the application is rich in oil and has high volatile content, and is easy to ignite; the coal gangue and the waste tires and / or waste plastic bottles have high fixed carbon content and long burning time, so that the biofuel particle of the application has high calorific value and stable combustion, and can be used as a substitute fuel to alleviate the problem of the increasing shortage of traditional fossil fuels. The application effectively utilizes swill, waste tires and / or waste plastic bottles and coal gangue powder to prepare biofuel particles, and solves the various hazards caused by long-term storage of coal gangue. DETAILED DESCRIPTION

[0022] The application provides a coal gangue-containing biofuel particle, which comprises the following components in percentage by mass:

[0023] The coal gangue powder is 60-62% by mass percentage;

[0024] The oil-stained mixture is 14-15% by mass percentage;

[0025] The high-molecular waste powder is 24-26% by mass percentage;

[0026] The sulfur content in the coal gangue powder is 4.2-9% by mass percentage, the total water content is 5.0-6.5%, the ash content is 58-78%, the volatile content is 5.5-11%, and the fixed carbon content is 16-20.5%;

[0027] The oil-stained mixture is waste engine oil and / or oil-stained material;

[0028] The oil-stained material is obtained by sequentially crushing and drying swill;

[0029] The high-molecular waste powder is obtained by crushing waste tires and / or waste plastic bottles.

[0030] The biofuel particle provided by the present application comprises coal gangue powder 60-62% by mass, preferably 60-61%. In the present application, the coal gangue powder is preferably obtained by sequentially drying and crushing coal gangue; the coal gangue powder preferably has a mesh size of 300-400 mesh; the present application does not have special requirements for the drying and crushing mode, and a mode well known to those skilled in the art can be selected; before drying, the present application also preferably sequentially washes and mechanically removes impurities from the coal gangue; the present application does not have special requirements for the washing and mechanical impurity removal mode, and a mode well known to those skilled in the art can be selected; the coal gangue powder preferably has a calorific value of 1127-1500 kcal / kg.

[0031] The biofuel particle provided by the present application comprises oil-stained mixture 14-15% by mass, preferably 14-14.7%. In the present application, the oil-stained mixture is waste engine oil and / or oil-stained material; the oil-stained material is obtained by sequentially crushing and drying swill; the present application preferably dries the swill until it is viscous; the swill is a catering residue, and the present application does not have special requirements for the composition of the swill; the present application does not have special requirements for the drying and crushing mode, and a mode well known to those skilled in the art can be selected.

[0032] The biofuel particle provided by the present application comprises high-molecular waste powder 24-26% by mass, preferably 24.5-26%. In the present application, the high-molecular waste powder preferably has a mesh size of 300-450 mesh; the high-molecular waste powder is obtained by crushing waste tires and / or waste plastic bottles; the present application does not have special requirements for the crushing mode, and a mode well known to those skilled in the art can be selected.

[0033] In the present application, the coal-gangue-containing biofuel particle preferably has a diameter of 8-10 mm, a length of 12-15 mm, and a density of 1.76-2 g / cm 3 ; by mass fraction, the coal-gangue-containing biofuel particle preferably has a sulfur content of 0.8-2.37%, a total water content of 1.9-3.23%, an ash content of 22.65-32.2%, a total volatile content of 28.25-46.3%, and a fixed carbon content of 26.7-41.33%; the coal-gangue-containing biofuel particle preferably has a calorific value of 3786-5036 kcal / kg.

[0034] The present application also provides a preparation method of the coal-gangue-containing biofuel particle described in the above technical solution, comprising the following steps:

[0035] The coal-gangue-containing biofuel particle is obtained by mixing the coal gangue powder, the oil-stained mixture, and the high-molecular waste powder and then granulating.

[0036] In the present application, the granulation is preferably extrusion granulation; the present application has no special requirements for the mixing method, and uniform mixing is sufficient; after obtaining the granular biofuel, the present application further comprises drying the obtained granular biofuel; the present application has no special requirements for the drying method, and a method well known to those skilled in the art can be selected.

[0037] The present application also provides the use of the coal gangue-containing biofuel particles as described in the technical solutions above as power generation fuel; the present application has no special requirements for the use method, and a method well known to those skilled in the art can be selected.

[0038] In order to further illustrate the present application, the coal gangue-containing biofuel particles, the preparation method and the use thereof provided by the present application are described in detail below in conjunction with examples, but they should not be understood as limiting the protection scope of the present application.

[0039] Example 1

[0040] 3000 g of coal gangue was cleaned and mechanically decontaminated, and then dehydrated and dried to obtain 2870 g of dried coal gangue. The obtained dried coal gangue was crushed in a crusher to obtain 2820 g of coal gangue powder with a particle size of 400 mesh. The sulfur content in the obtained coal gangue powder was 5.33%, the total water content was 5.22%, the ash content was 67.41%, the volatile matter content was 5.96%, the fixed carbon content was 16.08%, and the calorific value was 1196 kcal / kg.

[0041] The catering leftovers were crushed and vacuum dried to be viscous to obtain a mixture containing oil stains.

[0042] The waste and old tires were cleaned and crushed to obtain a waste and old tire powder with a particle size of 450 mesh.

[0043] The 2820 g of coal gangue powder, 660 g of the mixture containing oil stains, and 1223 g of the waste and old tire powder were uniformly mixed and extrusion granulated to obtain granules. The obtained granules were dried to obtain 4703 g of coal gangue-containing biofuel particles. The coal gangue-containing biofuel particles had a diameter of 8 mm, a length of 12 mm, and a density of 1.76 g / cm 3 The sulfur content in the coal gangue-containing biofuel particles was 2.10%, the total water content was 3.17%, the ash content was 31.20%, the fixed carbon content was 32.30%, the total volatile matter content was 31.23%, and the calorific value of the coal gangue-containing biofuel particles was 4412 kcal / kg.

[0044] Example 2

[0045] The 500 g of coal gangue from Dafang County, Guizhou Province is washed and mechanically decontaminated, then dehydrated and dried to obtain 483 g of dried coal gangue. The dried coal gangue is crushed in a crusher to obtain 480 g of coal gangue powder with a particle size of 400 mesh. The sulfur content in the obtained coal gangue powder is 4.29%, the total water content is 6.35%, the ash content is 58.39%, the volatile content is 10.88%, the fixed carbon content is 20.09%, and the calorific value is 1496 kcal / kg;

[0046] The catering leftovers are crushed and vacuum dried to be viscous to obtain a mixture containing oil stains;

[0047] The waste mineral water bottles are washed and crushed to obtain a waste mineral water bottle powder with a particle size of 400 mesh;

[0048] The 480 g of coal gangue powder, 116 g of the mixture containing oil stains, and 193.55 g of the waste tire powder are uniformly mixed and extruded to obtain granules. The obtained granules are dried to obtain 789 g of coal-gangue-containing biofuel granules. The coal-gangue-containing biofuel granules have a diameter of 10 mm, a length of 12 mm, and a density of 1.79 g / cm 3 The sulfur content in the obtained coal-gangue-containing biofuel granules is 2.37%, the total water content is 3.23%, the ash content is 28.27%, the fixed carbon content is 37.43%, the total volatile content is 28.25%, and the calorific value of the coal-gangue-containing biofuel granules is 4563 kcal / kg.

[0049] Example 3

[0050] The coal-gangue-containing biofuel granules are prepared according to the method of Example 2, and other conditions are the same as those of Example 2, except that the waste mineral water bottles are replaced by waste tires;

[0051] The sulfur content in the obtained coal-gangue-containing biofuel granules is 1.87%, the total water content is 3.15%, the ash content is 26.27%, the fixed carbon content is 39.54%, the total volatile content is 29.17%, and the calorific value of the coal-gangue-containing biofuel granules is 4776 kcal / kg.

[0052] Example 4

[0053] The 630 g of coal gangue from Dafang County, Guizhou Province is washed and mechanically decontaminated, then dehydrated and dried to obtain 605 g of dried coal gangue. The dried coal gangue is crushed in a crusher to obtain 600 g of coal gangue powder with a particle size of 400 mesh. The sulfur content in the obtained coal gangue powder is 4.29%, the total water content is 6.35%, the ash content is 58.39%, the volatile content is 10.88%, the fixed carbon content is 20.09%, and the calorific value is 1496 kcal / kg;

[0054] The catering leftovers are crushed and vacuum dried to be viscous to obtain an oil-stained mixture;

[0055] The waste mineral water bottle is cleaned and crushed to obtain a 400-mesh waste mineral water bottle powder;

[0056] The waste tire is cleaned and crushed to obtain a 400-mesh waste tire powder;

[0057] The 600 g of coal gangue powder, 70 g of the oil-stained mixture, 70 g of waste engine oil, 125 g of the waste tire powder, and 135 g of the waste tire powder are mixed uniformly and then extruded and granulated to obtain granules, and the obtained granules are dried to obtain 1000 g of coal-gangue-containing biofuel granules, wherein the coal-gangue-containing biofuel granules have a diameter of 10 mm, a length of 12 mm, and a density of 1.79 g / cm 3 The sulfur content of the coal-gangue-containing biofuel granules is 1.62%, the total water content is 3%, the ash content is 22.65%, the fixed carbon content is 41.33%, the total volatile content is 31.4%, and the calorific value of the coal-gangue-containing biofuel granules is 5036 kcal / kg.

[0058] The above description is only the preferred embodiments of the present application, and does not limit the present application in any form. It should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A coal refuse-containing biofuel pellet, characterized by, It comprises the following components by mass percentage: 60-62% of coal gangue powder; 14-15% of oil-stained mixture; 24-26% of high-molecular waste powder; The sulfur content in the coal gangue powder is 4.2-9% by mass percentage, the total water content is 5.0-6.5%, the ash content is 58-78%, the volatile content is 5.5-11%, and the fixed carbon content is 16-20.5%; The oil-stained mixture is waste engine oil and / or oil-stained material; The oil-stained material is obtained by pulverizing and drying hogwash in sequence; The high-molecular waste powder is obtained by crushing waste tires and / or waste plastic bottles.

2. The coal refuse-containing biofuel pellet according to claim 1, characterized by, The coal gangue powder is obtained by drying and crushing coal gangue in sequence; the mesh number of the coal gangue powder is 300-400 mesh.

3. The coal refuse-containing biofuel pellet of claim 1, wherein, The mesh number of the high-molecular waste powder is 300-450 mesh.

4. The coal refuse-containing biofuel pellet of claim 1, wherein, The coal gangue-containing biofuel particle has a diameter of 8-10 mm, a length of 12-15 mm, and a density of 1.76-2 g / cm 3 .

5. The coal refuse-containing biofuel pellet according to claim 1 or 4, characterized by, The sulfur content in the coal-gangue-containing biofuel particles is 0.8-2.37% by mass percentage, the total water content is 1.9-3.23%, the ash content is 22.65-32.2%, the total volatile content is 28.25-46.3%, and the fixed carbon content is 26.7-41.33%.

6. The coal refuse-containing biofuel pellet according to claim 1 or 4, wherein, The calorific value of the coal-gangue-containing biofuel particles is 3786-5036 kcal / kg.

7. The method of producing coal refuse-containing biofuel pellets according to any one of claims 1 to 6, characterized in that, It comprises the following steps: The coal gangue powder, the oil-stained mixture, and the high-molecular waste powder are mixed and granulated to obtain the coal-gangue-containing biofuel particles.

8. The coal-gangue-containing biofuel particles of any one of claims 1-6 or prepared by the preparation method of claim 7 are used as power generation fuel.