High-strength and high-calorific-value biomass pellet fuel and preparation method thereof

Abstract

The invention discloses a high-strength and high-calorific-value biomass pellet fuel and a preparation method thereof, belongs to the technical field of environment-friendly biomass fuels, and provides a preparation method of the high-strength and high-calorific-value biomass pellet fuel, which comprises the following steps: drying and crushing herbivorous animal manure to obtain pretreated herbivorous animal manure; wood chips are dried and smashed, and pretreated wood chips are obtained; and mixing the pretreated herbivorous animal manure with the pretreated sawdust, adjusting the water content to 3-6% to obtain a premix, and granulating to obtain the biomass pellet fuel. According to the invention, organic wastes such as cattle and sheep manure and sawdust resources purchased from surrounding areas are organically combined to prepare the biomass pellet fuel, so that the dual goals of recycling and harmlessness can be achieved, and a feasible solution is provided for the development of clean energy.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental protection biomass fuels, and particularly relates to a high-strength and high-calorific value biomass pellet fuel and a preparation method thereof. Background Art

[0003] As a new type of environmental protection energy, biomass pellet fuel has the advantages of being clean, efficient, easy to transport, and storable. Compared with traditional coal fuels, biomass pellet fuel hardly produces pollutants such as sulfur oxides and nitrogen oxides during the combustion process, greatly reducing the emission of air pollutants. At the same time, the ash generated after the combustion of biomass fuel returns to the land, realizing the recycling of resources. Therefore, the popularization and application of biomass pellet fuel are of great significance for improving the ecological environment, reducing carbon emissions, and enhancing resource utilization efficiency. Summary of the Invention

[0004] To solve the above technical problems, the present invention proposes a high-strength and high-calorific value biomass pellet fuel and a preparation method thereof, which organically combines organic waste such as cattle and sheep manure with wood chip resources purchased from the surrounding area to prepare biomass pellet fuel, achieving the dual goals of resource utilization and harmlessness, and providing a feasible solution for the development of clean energy.

[0005] To achieve the above object, the present invention provides a preparation method of a high-strength and high-calorific value biomass pellet fuel, comprising the following steps:

[0006] S1. Drying and pulverizing herbivore feces to obtain pretreated herbivore feces;

[0007] S2. Drying and pulverizing wood chips to obtain pretreated wood chips;

[0008] S3. Mixing the pretreated herbivore feces obtained in S1 and the pretreated wood chips obtained in S2, and adjusting the water content to 3-6% to obtain a premix;

[0009] S4. Pelletizing the premix obtained in S3 to obtain biomass pellet fuel.

[0010] Preferably, the herbivore feces in S1 are cow manure and / or sheep manure.

[0011] Preferably, the drying temperature in S1 is 70-100°C, and the drying time is 20-28h.

[0012] Preferably, the particle size of the pretreated herbivore feces obtained by pulverizing in S1 is 1-3mm.

[0013] Preferably, the drying temperature in S2 is 70-100°C, and the drying time is 20-28h.

[0014] Preferably, the particle size of the pretreated wood chips obtained by crushing in S2 is 1-3 mm.

[0015] Preferably, the mixing of the pretreated herbivore feces obtained in S1 and the pretreated wood chips obtained in S2 in S3 is in a dry basis mass ratio of (1-2):(1-2).

[0016] Preferably, the granulation in S4 is carried out by tabletting, and the pressure is 5.5-6.5 t.

[0017] The present invention also provides a biomass pellet fuel prepared by the described preparation method.

[0018] Compared with the prior art, the present invention has the following advantages and technical effects:

[0019] The biomass pellet fuel prepared by the preparation method of the present invention organically combines herbivore feces and wood chip resources purchased from the surrounding area to prepare a biomass pellet fuel. Analyzing the production cost and calorific value of the fuel from the economic aspect, the calorific value of cow dung is about 3200 Kcal / kg, and the market price is about 200 yuan / ton; the calorific value of sheep dung is 3300 Kcal / kg, and the market price is about 200 yuan / ton; while the calorific value of wood chips is relatively high, reaching 4200 Kcal / kg, and the market price is about 350 yuan / ton. In contrast, the calorific value of traditional coal is about 4700 Kcal / kg, and the market price is about 1200 yuan / ton. Through comparative analysis, it can be found that the unit calorific value price of the biomass pellet fuel obtained by mixing cow dung and wood chips in a 1:1 ratio is reduced by 70.98% compared with the unit calorific value price of coal, having a significant cost advantage. This economic advantage provides the possibility for biomass pellet fuel to replace part of the coal, and helps to alleviate the air pollution problem caused by coal-fired heating in winter. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 For the strength determination of the biomass pellets in Example 1;

[0022] Figure 2 For the strength determination of the biomass pellets in Example 4;

[0023] Figure 3 For the strength determination of the biomass pellets in Example 10;

[0024] Figure 4Determination of the strength of the biomass pellets in Example 8. Detailed implementation manners

[0025] Now, various exemplary implementation manners of the present invention will be described in detail. This detailed description should not be considered as a limitation of the present invention, but rather as a more detailed description of certain aspects, characteristics, and implementation manners of the present invention.

[0026] It should be understood that the terms described in the present invention are only for describing specific implementation manners and are not used to limit the present invention. Additionally, for the numerical ranges in the present invention, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Each intermediate value within any stated value or stated range, as well as each smaller range between any other stated value or intermediate value within the stated range, is also included in the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded from the range.

[0027] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention pertains. Although the present invention only describes preferred methods and materials, any methods and materials similar or equivalent to those described herein can also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials related to the documents. In case of conflict with any incorporated document, the content of this specification shall prevail.

[0028] Without departing from the scope or spirit of the present invention, various improvements and changes can be made to the specific implementation manners of the present invention specification, which are obvious to those skilled in the art. Other implementation manners obtained from the present invention specification are obvious to those skilled in the art. The present invention specification and examples are only exemplary.

[0029] Regarding "comprising", "including", "having", "containing", etc. used herein, they are all open-ended terms, meaning including but not limited to.

[0030] Example 1

[0031] S1. The cow dung is dried in an oven at 100 °C for 24 h and pulverized using a YMJ-002 type grinder (purchased from Tianjin Hengyueda Technology Co., Ltd.) to obtain pretreated herbivore feces with a particle size of 2 mm.

[0032] S2. The wood chips are dried in an oven at 100 °C for 24 h and pulverized using a YMJ-002 type grinder to obtain pretreated wood chips with a particle size of 2 mm.

[0033] S3. The pretreated herbivore feces and the pretreated wood chips are mixed according to a dry basis mass ratio of 1:1, and the water content is adjusted to 3% by artificial spraying to obtain a premix.

[0034] S4. The premix is granulated by tableting using a BJ-15 powder tableting machine (purchased from Tianjin Hengyueda Technology Co., Ltd.). The tableting pressure is 6 t to obtain the biomass pellet fuel.

[0035] Example 2

[0036] S1. Cow dung is dried in an oven at 100 °C for 24 h and pulverized using a YMJ-002 type grinder to obtain pretreated herbivore feces with a particle size of 2 mm.

[0037] S2. Wood chips are dried in an oven at 100 °C for 24 h and pulverized using a YMJ-002 type grinder to obtain pretreated wood chips with a particle size of 2 mm.

[0038] S3. The pretreated herbivore feces and the pretreated wood chips are mixed at a dry basis mass ratio of 1:1, and the water content is adjusted to 6% by manual spraying to obtain the premix.

[0039] S4. The premix is granulated by tableting using a BJ-15 powder tableting machine. The tableting pressure is 6 t to obtain the biomass pellet fuel.

[0040] Example 3

[0041] S1. Cow dung is dried in an oven at 100 °C for 24 h and pulverized using a YMJ-002 type grinder to obtain pretreated herbivore feces with a particle size of 2 mm.

[0042] S2. Wood chips are dried in an oven at 100 °C for 24 h and pulverized using a YMJ-002 type grinder to obtain pretreated wood chips with a particle size of 2 mm.

[0043] S3. The pretreated herbivore feces and the pretreated wood chips are mixed at a dry basis mass ratio of 1:2, and the water content is adjusted to 3% by manual spraying to obtain the premix.

[0044] S4. The premix is granulated by tableting using a BJ-15 powder tableting machine. The tableting pressure is 6 t to obtain the biomass pellet fuel.

[0045] Example 4

[0046] S1. Cow dung is dried in an oven at 100 °C for 24 h and pulverized using a YMJ-002 type grinder to obtain pretreated herbivore feces with a particle size of 2 mm.

[0047] S2. Wood chips are dried in an oven at 100 °C for 24 h and pulverized using a YMJ-002 type grinder to obtain pretreated wood chips with a particle size of 2 mm.

[0048] S3. The pretreated herbivore feces and the pretreated wood chips are mixed at a dry basis mass ratio of 1:2, and the water content is adjusted to 6% by manual spraying to obtain a premix.

[0049] S4. The premix is granulated by tableting using a BJ-15 powder tableting machine at a tableting pressure of 6 t to obtain biomass pellet fuel.

[0050] Example 5

[0051] S1. Cow dung is dried in an oven at 100 °C for 24 h and ground using a YMJ-002 type grinder to obtain pretreated herbivore feces with a particle size of 2 mm.

[0052] S2. Wood chips are dried in an oven at 100 °C for 24 h and ground using a YMJ-002 type grinder to obtain pretreated wood chips with a particle size of 2 mm.

[0053] S3. The pretreated herbivore feces and the pretreated wood chips are mixed at a dry basis mass ratio of 2:1, and the water content is adjusted to 3% by manual spraying to obtain a premix.

[0054] S4. The premix is granulated by tableting using a BJ-15 powder tableting machine at a tableting pressure of 6 t to obtain biomass pellet fuel.

[0055] Example 6

[0056] S1. Cow dung is dried in an oven at 100 °C for 24 h and ground using a YMJ-002 type grinder to obtain pretreated herbivore feces with a particle size of 2 mm.

[0057] S2. Wood chips are dried in an oven at 100 °C for 24 h and ground using a YMJ-002 type grinder to obtain pretreated wood chips with a particle size of 2 mm.

[0058] S3. The pretreated herbivore feces and the pretreated wood chips are mixed at a dry basis mass ratio of 2:1, and the water content is adjusted to 6% by manual spraying to obtain a premix.

[0059] S4. The premix is granulated by tableting using a BJ-15 powder tableting machine at a tableting pressure of 6 t to obtain biomass pellet fuel.

[0060] Example 7

[0061] S1. Sheep dung is dried in an oven at 100 °C for 24 h and ground using a YMJ-002 type grinder to obtain pretreated herbivore feces with a particle size of 2 mm.

[0062] S2. Wood chips are dried in an oven at 100 °C for 24 h and ground using a YMJ-002 type grinder to obtain pretreated wood chips with a particle size of 2 mm.

[0063] S3. The pre-treated herbivore feces and pre-treated wood chips are mixed at a dry basis mass ratio of 1:2, and the water content is adjusted to 3% by manual spraying to obtain a premix.

[0064] S4. The premix is granulated by pressing using a BJ-15 powder tableting machine at a pressure of 6t to obtain biomass pellet fuel.

[0065] Example 8

[0066] S1. The sheep manure is dried in an oven at 100 °C for 24h and ground using a YMJ-002 grinder to obtain pre-treated herbivore feces with a particle size of 2mm.

[0067] S2. The wood chips are dried in an oven at 100 °C for 24h and ground using a YMJ-002 grinder to obtain pre-treated wood chips with a particle size of 2mm.

[0068] S3. The pre-treated herbivore feces and pre-treated wood chips are mixed at a dry basis mass ratio of 1:2, and the water content is adjusted to 6% by manual spraying to obtain a premix.

[0069] S4. The premix is granulated by pressing using a BJ-15 powder tableting machine at a pressure of 6t to obtain biomass pellet fuel.

[0070] Example 9

[0071] S1. The sheep manure is dried in an oven at 100 °C for 24h and ground using a YMJ-002 grinder to obtain pre-treated herbivore feces with a particle size of 2mm.

[0072] S2. The wood chips are dried in an oven at 100 °C for 24h and ground using a YMJ-002 grinder to obtain pre-treated wood chips with a particle size of 2mm.

[0073] S3. The pre-treated herbivore feces and pre-treated wood chips are mixed at a dry basis mass ratio of 1:1, and the water content is adjusted to 3% by manual spraying to obtain a premix.

[0074] S4. The premix is granulated by pressing using a BJ-15 powder tableting machine at a pressure of 6t to obtain biomass pellet fuel.

[0075] Example 10

[0076] S1. The sheep manure is dried in an oven at 100 °C for 24h and ground using a YMJ-002 grinder to obtain pre-treated herbivore feces with a particle size of 2mm.

[0077] S2. The wood chips are dried in an oven at 100 °C for 24h and ground using a YMJ-002 grinder to obtain pre-treated wood chips with a particle size of 2mm.

[0078] S3. The pretreated herbivore feces and the pretreated wood chips are mixed at a dry basis mass ratio of 1:1, and the water content is adjusted to 6% by manual spraying to obtain a premix.

[0079] S4. The premix is granulated by tableting using a BJ-15 powder tableting machine under a tableting pressure of 6 t to obtain biomass pellet fuel.

[0080] Example 11

[0081] S1. The sheep manure is dried in an oven at 100 °C for 24 h and crushed using a YMJ-002 type grinder to obtain pretreated herbivore feces with a particle size of 2 mm.

[0082] S2. The wood chips are dried in an oven at 100 °C for 24 h and crushed using a YMJ-002 type grinder to obtain pretreated wood chips with a particle size of 2 mm.

[0083] S3. The pretreated herbivore feces and the pretreated wood chips are mixed at a dry basis mass ratio of 2:1, and the water content is adjusted to 3% by manual spraying to obtain a premix.

[0084] S4. The premix is granulated by tableting using a BJ-15 powder tableting machine under a tableting pressure of 6 t to obtain biomass pellet fuel.

[0085] Example 12

[0086] S1. The sheep manure is dried in an oven at 100 °C for 24 h and crushed using a YMJ-002 type grinder to obtain pretreated herbivore feces with a particle size of 2 mm.

[0087] S2. The wood chips are dried in an oven at 100 °C for 24 h and crushed using a YMJ-002 type grinder to obtain pretreated wood chips with a particle size of 2 mm.

[0088] S3. The pretreated herbivore feces and the pretreated wood chips are mixed at a dry basis mass ratio of 2:1, and the water content is adjusted to 6% by manual spraying to obtain a premix.

[0089] S4. The premix is granulated by tableting using a BJ-15 powder tableting machine under a tableting pressure of 6 t to obtain biomass pellet fuel.

[0090] Comparative Example 1

[0091] Compared with Example 1, the difference is that the pretreated herbivore feces and the pretreated wood chips are mixed at a dry basis mass ratio of 4:1.

[0092] Comparative Example 2

[0093] Compared with Example 1, the difference is that the water content is adjusted to 0%.

[0094] Comparative Example 3

[0095] Compared with Example 1, the difference is that the water content is adjusted to 9% by manual spraying.

[0096] Comparative Example 4

[0097] Compared with Example 2, the difference is that the pre-treated herbivore feces and pre-treated wood chips are mixed at a dry basis mass ratio of 4:1.

[0098] Comparative Example 5

[0099] Compared with Example 3, the difference is that the water content is adjusted to 0%.

[0100] Comparative Example 6

[0101] Compared with Example 3, the difference is that the water content is adjusted to 9% by manual spraying.

[0102] Comparative Example 7

[0103] Compared with Example 5, the difference is that the water content is adjusted to 0%.

[0104] Comparative Example 8

[0105] Compared with Example 5, the difference is that the water content is adjusted to 9% by manual spraying.

[0106] Comparative Example 9

[0107] Compared with Example 1, the difference is that the pre-treated herbivore feces and pre-treated wood chips are mixed at a dry basis mass ratio of 4:1 and the water content is adjusted to 0%.

[0108] Comparative Example 10

[0109] Compared with Example 1, the difference is that the pre-treated herbivore feces and pre-treated wood chips are mixed at a dry basis mass ratio of 4:1 and the water content is adjusted to 9% by manual spraying.

[0110] Comparative Example 11

[0111] Compared with Example 7, the difference is that the water content is adjusted to 0%.

[0112] Comparative Example 12

[0113] Compared with Example 7, the difference is that the water content is adjusted to 9% by manual spraying.

[0114] Comparative Example 13

[0115] Compared with Example 9, the difference is that the water content is adjusted to 0%.

[0116] Comparative Example 14

[0117] Compared with Example 9, the difference is that the water content is adjusted to 9% by manual spraying.

[0118] Comparative Example 15

[0119] Compared with Example 11, the difference is that the water content is adjusted to 0%.

[0120] Comparative Example 16

[0121] Compared with Example 11, the difference is that the water content is adjusted to 9% by artificial spraying.

[0122] Comparative Example 17

[0123] Compared with Example 9, the difference is that the pretreated herbivore feces and the pretreated wood chips are mixed at a dry basis mass ratio of 4:1, and the water content is adjusted to 0%.

[0124] Comparative Example 18

[0125] Compared with Example 9, the difference is that the pretreated herbivore feces and the pretreated wood chips are mixed at a dry basis mass ratio of 4:1.

[0126] Comparative Example 19

[0127] Compared with Example 9, the difference is that the pretreated herbivore feces and the pretreated wood chips are mixed at a dry basis mass ratio of 4:1, and the water content is adjusted to 6% by artificial spraying.

[0128] Comparative Example 20

[0129] Compared with Example 9, the difference is that the pretreated herbivore feces and the pretreated wood chips are mixed at a dry basis mass ratio of 4:1, and the water content is adjusted to 9% by artificial spraying.

[0130] Experimental Example

[0131] The calorific value and strength of the biomass pellet fuels prepared in Examples 1 to 12 and Comparative Examples 1 to 20 were measured, and the results are shown in Table 1 below.

[0132] Table 1 Properties of the biomass pellet fuels prepared in Examples 1 to 12 and Comparative Examples 1 to 20

[0133]

[0134]

[0135] According to Table 1, it can be seen that the calorific value is an important measure of the efficiency of biomass pellet fuels, and the proportion of cow dung, sheep dung, wood chips and water content have important effects on the calorific value of biomass pellet fuels. The strength is an important index for measuring biomass pellet fuels. The calorific value of Example 1 is 3727 Cal / g and the strength is 20.083 kN; the calorific value of Example 2 is 3635 Cal / g and the strength is 17.013 kN (as Figure 1As shown in the figure); the calorific value of Example 3 is 3940 Cal / g, and the strength is 23.291 kN; the calorific value of Example 4 is 3817 Cal / g, and the strength is 28.395 kN (as Figure 2 shown); the actual calorific value of Example 5 is 3617 Cal / g, and the strength is 32.266 kN; however, the actual calorific value of Comparative Example 1 is 3442 Cal / g, and the strength is 27.236 kN; the actual calorific value of Comparative Example 2 is 3877 Cal / g, and the strength is 19.762 kN; the actual calorific value of Comparative Example 3 is 3437 Cal / g, and the actual strength is 17.314 kN.

[0136] The strength of the biomass pellets in Example 10 is as Figure 3 shown, and the strength of the biomass pellets in Example 8 is as Figure 4 shown.

[0137] Table 2 Detection Report of Biomass Pellet Fuels Prepared in Example 10

[0138]

[0139]

[0140] Table 3 Detection Report of Biomass Pellet Fuels Prepared in Example 7

[0141]

[0142]

[0143] Table 4 Detection Report of Biomass Pellet Fuels Prepared in Example 1

[0144]

[0145]

[0146] Table 5 Detection Report of Biomass Pellet Fuels Prepared in Example 3

[0147]

[0148]

[0149] As shown in the above Tables 2 to 5 are the detection reports of the biomass pellet fuels prepared in the examples of the present invention.

[0150] The above-described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for preparing high-strength and high-calorific value biomass pellet fuel, characterized in that: The following steps are involved: S1. Drying and crushing the feces of herbivorous animals to pre-treat the feces of herbivorous animals; S2, drying and crushing the sawdust to obtain pretreated sawdust; S3, the pretreated herbivore feces obtained in S1 and the pretreated sawdust obtained in S2 are mixed, and the water content is adjusted to 3-6% to obtain a premix; The premix obtained in S4 and S3 is pelletized to obtain biomass pellet fuel.

2. The preparation method according to claim 1, characterized in that: The herbivore excrement described in S1 is cow excrement and / or sheep excrement.

3. The preparation method according to claim 1, characterized in that: The drying temperature in S1 is 70-100° C., and the drying time is 20-28 hours.

4. The preparation method according to claim 1, characterized in that: The particle size of the pre-treated herbivore feces obtained by pulverizing in S1 is 1 to 3 mm.

5. The preparation method according to claim 1, characterized in that: The drying temperature in S2 is 70-100° C., and the drying time is 20-28 hours.

6. The preparation method according to claim 1, characterized in that: The particle size of the pretreated wood chips obtained by the crushing in S2 is 1 to 3 mm.

7. The preparation method according to claim 1, characterized in that: In S3, the pretreated herbivore manure obtained in S1 and the pretreated wood chips obtained in S2 are mixed in a dry basis mass ratio of (1-2): (1-2).

8. The preparation method according to claim 1, characterized in that: The granulation in S4 is carried out by tableting with a pressure of 5.5 to 6.5 t.

9. The biomass pellet fuel prepared by the preparation method according to any one of claims 1 to 8.

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