A method for rapidly detecting moisture in biomass

Abstract

The application discloses a kind of detection methods for rapidly detecting biomass moisture, comprising the following steps: S1, take bamboo piece one, place in drying oven, bamboo piece one moisture is dried, and the mass m1 is weighed;S2, after drying, bamboo piece one is soaked in water and adsorbed to saturated state, and the mass m2 is weighed;S3, the moisture mass absorbed by bamboo piece one is m2-m1, and the saturated water absorption of unit mass bamboo piece alpha=(m2-m1) / m1;S4, randomly take bamboo piece two, and weigh it as m3, soak it in water and adsorb to saturated state, and weigh it as m4;The application can quickly and accurately detect the moisture content of biomass raw materials by using the soaking method, which is convenient for the acceptance of biomass raw materials, and the moisture content of the same type of biomass raw materials does not need to repeat the drying experiment, the overall detection time is shortened, the labor intensity of the moisture content detection personnel is reduced, and the detection cost and labor cost are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of biomass measurement, and in particular to a method for rapidly detecting the moisture content of biomass. Background Art

[0002] Biomass, derived from living organisms, has a high moisture content, ranging from less than 20% in dry straw and sawdust to over 95% in microalgae, fermentation residues, and biosludge. Moisture content is a crucial factor influencing biomass resource utilization, especially its use for energy conversion. In forest and ecological research, moisture content is often calculated as the ratio of water mass to biomass mass, so it can exceed 100%. Biomass always contains water.

[0003] Based on its own needs for carbon reduction, environmental protection and green transformation, research on alternative combustion fuels suitable for cement production is carried out. The demand for biomass resources is large and there are many varieties. The main raw materials are bamboo, wood chips, walnut shells, walnut cattails, straw, coconut shells, peanut shells, wood chips, etc. During the implementation process, the moisture content of different biomass raw materials varies greatly. When encountering biomass raw materials with high moisture content, the detection time is long, the labor intensity of workers increases, and it is not convenient for the acceptance of biomass raw materials. In addition, the moisture content of the same type of biomass raw materials requires repeated drying experiments, which increases the cost. Therefore, a detection method for rapid detection of biomass moisture is proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to propose a method for quickly detecting the moisture content of biomass.

[0005] A method for rapidly detecting moisture in biomass comprises the following steps:

[0006] S1. Take bamboo piece 1, place it in a drying oven, dry it out, and weigh its mass m1.

[0007] S2. Soak the dried bamboo piece 1 in water until it is saturated with water, and weigh its mass as m2;

[0008] S3, the mass of water absorbed by the bamboo piece is m2-m1, and the saturated water absorption per unit mass of the bamboo piece α=(m2-m1) / m1;

[0009] S4, randomly pick up two bamboo pieces, weigh them as m3, soak them in water until they are saturated, and weigh their mass as m4;

[0010] S5. The water absorption of bamboo piece 2 is M=m4-m3. Assuming that the moisture content of bamboo piece 2 is X, the water absorption of bamboo piece per unit mass is M / (m3(1-X)).

[0011] S6. The difference between the saturated water absorption of unit mass of bamboo chips and the water absorption of unit mass of hydrated bamboo chips is the moisture content of unit mass of hydrated bamboo chips. The calculation formula α-M / (m3(1-X))=m3X / (m3(1-X)) is listed. It can be deduced that the moisture content calculation formula of hydrated bamboo chips is X=(m3α-M) / (m3α+m3).

[0012] In the above-mentioned method for rapidly detecting moisture in biomass, the temperature of the drying oven in step S1 is 120°C.

[0013] In the above-mentioned method for rapidly detecting moisture in biomass, the soaking time of the bamboo piece 1 in step S2 is 3 hours.

[0014] In the above-mentioned method for rapidly detecting moisture in biomass, the soaking time of the bamboo piece 2 in step S4 is 2-4 hours.

[0015] In the above-mentioned method for rapidly detecting moisture in biomass, an ultrasonic instrument is used for soaking the second bamboo piece in step S4, and the soaking time is 10 minutes.

[0016] In the above-mentioned method for rapidly detecting moisture in biomass, after soaking, the first and second bamboo pieces are wiped dry of surface moisture and then weighed.

[0017] Compared with the existing technology, the advantages of the present invention are:

[0018] 1. The present invention adopts the immersion method to quickly and accurately detect the moisture content of the same biomass raw material in different states, which is convenient for the acceptance of biomass raw materials.

[0019] 2. The overall testing time is shortened, the labor intensity of moisture content testers is reduced, and the moisture content of the same type of biomass raw materials does not require repeated drying experiments, saving testing costs and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention provides a flow chart of a method for determining the moisture content of a biomass rapid detection method.

[0021] Figure 2 1 is a graph showing the change in moisture content of bamboo chips with drying time in a drying oven at 120° C. in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] Reference Figure 1As shown, a method for quickly detecting the moisture content of biomass comprises the following steps:

[0024] S1. Take bamboo piece 1 and place it in a drying oven at 120°C to dry out the moisture. The mass of bamboo piece 1 in the dry state is m1.

[0025] S2. Soak the dried bamboo piece in water for 3 hours until it reaches saturation state. The mass is m2.

[0026] S3. The mass of water absorbed by the bamboo piece is m2-m1, and the saturated water absorption per unit mass of the bamboo piece can be calculated as α = (m2-m1) / m1 (g H2O / g bamboo piece);

[0027] S4. Randomly pick two bamboo pieces (undried bamboo pieces are fine), weigh them as m3, soak them in water for 2-4 hours until they are saturated, and weigh their mass as m4;

[0028] S5. The water absorption of bamboo piece 2 is M = m4 - m3. Assuming that the moisture content of bamboo piece 2 is X, the water absorption per unit mass of bamboo piece with moisture is M / (m3(1-X))(g H2O / g bamboo piece);

[0029] S6. The difference between the saturated water absorption of unit mass of bamboo chips and the water absorption of unit mass of hydrated bamboo chips is the moisture content of unit mass of hydrated bamboo chips. The calculation formula α-M / (m3(1-X))=m3X / (m3(1-X)) is listed. It can be deduced that the moisture content calculation formula of hydrated bamboo chips is X=(m3α-M) / (m3α+m3).

[0030] In step S4, an ultrasonic instrument can be used for soaking the second bamboo piece, and the soaking time is shortened to 10 minutes, which further reduces the detection time and improves the detection efficiency.

[0031] After the bamboo pieces 1 and 2 are soaked, the surface moisture is wiped dry and then weighed, which ensures the correctness of the data and thus improves the accuracy of the test results.

[0032] Example

[0033] 1. Take a piece of bamboo and place it in a drying oven at 120 degrees to dry the bamboo. The weight is 2.4g.

[0034] 2. Soak the dried bamboo slices in water for 3 hours until they are saturated with water. After taking them out, wipe off the surface moisture and weigh them to 4.0 g.

[0035] 3. The mass of water absorbed by the bamboo piece is 4.0-2.4=1.6g, and the saturated water absorption per unit mass of bamboo piece is 1.6 / 2.4=0.666g H2O / g bamboo piece;

[0036] 4. Randomly pick a wet bamboo piece and weigh it to be 3.2g. Soak it in water for 2 hours, then take it out and wipe off the surface moisture. The weight is 3.6g.

[0037] 5. The water absorption of the hydrated bamboo piece is M = 3.6 - 3.2 = 0.4 g. Assume that the moisture content of bamboo piece 2 is X.

[0038] 6. The difference between the saturated water absorption of unit mass of bamboo chips and the water absorption of unit mass of hydrated bamboo chips is the moisture content of unit mass of hydrated bamboo chips. The calculation formula is α-M / (m3(1-X))=m3X / (m3(1-X)). It can be deduced that the moisture content calculation formula of hydrated bamboo chips is X=(m3α-M) / (m3α+m3)*100%=(3.2*0.666-0.4) / (3.2*0.666+3.2)*100%=32.4%.

[0039] like Figure 2 As shown, multiple bamboo slices were placed in a drying oven at 120°C, and a piece of bamboo slice was taken out every 30 minutes to test the moisture content. It can be seen from the above line graph that the average total moisture content of the bamboo slices is 33%. The test results show that the moisture content of the bamboo slices in the drying oven at 120°C is 19.9% ​​after 4 hours, 16.4% after 6 hours, and 10.3% after 7 hours. After about 10 hours of drying, the moisture of the bamboo slices is basically dried.

[0040] After using the soaking method, the moisture content of the same type of biomass raw materials does not need to be repeated in the drying experiment, and the detection time is shortened to 3-4 hours, which reduces the detection time, reduces labor intensity and saves costs.

[0041] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

Claims

1. A method for rapidly detecting moisture in biomass, characterized by: The following steps are involved: S1. Take bamboo piece 1, place it in a drying oven, dry it out, and weigh its mass m1. S2. Soak the dried bamboo piece 1 in water until it is saturated with water, and weigh its mass as m2; S3, the mass of water absorbed by the bamboo piece is m2-m1, and the saturated water absorption per unit mass of the bamboo piece α=(m2-m1) / m1; S4, randomly pick up two bamboo pieces, weigh them as m3, soak them in water until they are saturated, and weigh their mass as m4; S5. The water absorption of bamboo piece 2 is M=m4-m3. Assuming that the moisture content of bamboo piece 2 is X, the water absorption of bamboo piece per unit mass is M / (m3(1-X)). S6. The difference between the saturated water absorption of unit mass of bamboo chips and the water absorption of unit mass of hydrated bamboo chips is the moisture content of unit mass of hydrated bamboo chips. The calculation formula α-M / (m3(1-X))=m3X / (m3(1-X)) is listed. It can be deduced that the moisture content calculation formula of hydrated bamboo chips is X=(m3α-M) / (m3α+m3).

2. A method for rapidly detecting moisture in biomass according to claim 1, characterized in that: The temperature of the drying oven in step S1 is 120°C.

3. The method for rapidly detecting moisture in biomass according to claim 1, wherein: The soaking time of the bamboo piece 1 in step S2 is 3 hours.

4. The method for rapidly detecting moisture in biomass according to claim 1, wherein: The soaking time of the bamboo piece 2 in step S4 is 2-4 hours.

5. The method for rapidly detecting moisture in biomass according to claim 1, wherein: In step S4, the second bamboo piece is soaked using an ultrasonic device, and the soaking time is 10 minutes.

6. A method for rapidly detecting moisture in biomass according to claim 1, characterized in that: After soaking, the first and second bamboo pieces are wiped dry and weighed.

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