CN114808519B - High-value utilization method of ginger straws - Google Patents
High-value utilization method of ginger straws Download PDFInfo
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- CN114808519B CN114808519B CN202210428692.4A CN202210428692A CN114808519B CN 114808519 B CN114808519 B CN 114808519B CN 202210428692 A CN202210428692 A CN 202210428692A CN 114808519 B CN114808519 B CN 114808519B
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- D—TEXTILES; PAPER
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- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
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- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
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- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
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- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C1/00—Pretreatment of the finely-divided materials before digesting
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Abstract
The invention discloses a method for high-value utilization of ginger straws, which comprises the following steps: s1, crushing; s2, kneading; s3, cleaning; s4, high-temperature hydrolysis: conveying the ginger straw shreds to a high-temperature hydrolysis tank, carrying out high-temperature aerobic cooking on the ginger straw shreds, accelerating the oxidation and softening hydrolysis of the straws and outputting steam by using an aeration oxygenation method, and collecting the steam and then condensing and extracting to obtain hydrosol and ginger essential oil; s5, solid-liquid separation: carrying out solid-liquid kneading separation on the materials subjected to high-temperature hydrolysis to obtain water and ginger straw shreds, and S6, hydrolyzing at normal temperature: the separated ginger straw shreds are put into a normal-temperature hydrolysis tank to be mechanically stirred and separated and cleaned at normal temperature; s7, solid-liquid separation: performing solid-liquid kneading separation on the materials in the normal-temperature hydrolysis tank to obtain water and ginger straw shreds; s8, grinding: pulping by using a high-concentration pulping machine to obtain paper pulp; the invention can fully utilize the ginger straws to produce the ginger essential oil, the paper pulp and the organic fertilizer raw materials.
Description
Technical Field
The invention belongs to the technical field of comprehensive utilization processes of agricultural and forestry wastes, and particularly relates to a high-value utilization method of ginger straws.
Background
China is one of the origin and main production countries of ginger, has a history of more than two thousand years of cultivation from now, and most of the areas except northeast and northwest alpine areas are planted; the part of the ginger land is about one meter high, and a large amount of ginger straws are generated in the ginger harvesting period; the acre yield of the ginger is generally 3000-5000 kg, and the acre yield of the ginger in individual areas is up to 8000kg or more; in a single plant, the ratio of ginger straw to ginger is about 1:1.
At present, the ginger straws are still not utilized in a large-scale high-value mode, a large amount of ginger straws which are difficult to dispose and pollute the environment are generated after the ginger is harvested, the ginger straws are difficult to degrade due to the fact that the ginger straws contain natural bacteriostatic components due to high water content, ginger plague is easily caused when the ginger straws are returned to the field, the ginger straws are piled up and stored in the field, and a plurality of problems are brought to the local ecological environment and the rural environment.
In order to solve the above technical problems, there is a technology for producing paper pulp by using ginger seedlings as raw materials in the prior art, for example, the patent application number is: CN201010520351.7 discloses a method for making paper pulp by ginger seedling and the paper pulp made by the method, which comprises: putting ginger seedlings into water added with black rot fungi and soft rot fungi, twisting the ginger seedlings by a twisting machine, and washing the ginger seedlings by water; and then putting the mixture into a pulping machine for pulping, adding white rot fungi and brown rot fungi into the pulp, removing sand grains in the pulp by a gravity separation method, squeezing, drying and packaging to obtain a finished product, and then leaving the factory.
In the prior art, the ginger seedlings are used as raw materials to produce the paper pulp, but the method for manufacturing the paper pulp by the ginger seedlings is complex in whole, the production efficiency is low, the produced product is single, only the paper pulp at the production position can be produced, the ginger straws cannot be fully utilized, the use effect is further reduced, and the economic benefit of enterprises is reduced.
In addition, the existing method for manufacturing paper pulp by using ginger seedlings needs to add white rot fungi, brown rot fungi and other strains, so that the process steps are complex, the production cost is high, and the economic benefit is low.
Due to the characteristics of the ginger straws, the fiber content of the ginger straws is high, and the ginger straws are difficult to crush and knead, so that the utilization rate of the ginger straws is low.
Disclosure of Invention
The invention aims to solve the main technical problem of providing a high-value utilization method of ginger straws, which can fully utilize the ginger straws to produce ginger essential oil, paper pulp and organic fertilizer raw materials.
In order to solve the technical problems, the invention provides the following technical scheme:
a method for high-value utilization of ginger straws comprises the following steps:
s1, crushing: cutting the ginger straws into ginger straw powder;
s2, kneading: crushing and kneading the cut ginger straws to obtain ginger straw shreds;
s3, cleaning: conveying the ginger straw shreds into a cleaning pool for cleaning;
s4, high-temperature hydrolysis: conveying the cleaned ginger straw shreds to a high-temperature hydrolysis tank through a material lifting conveyor, carrying out high-temperature aerobic cooking on the ginger straw shreds, accelerating the oxidation and softening hydrolysis of the straws and the output of steam by using an aeration oxygenation method, and collecting the steam and then carrying out condensation extraction to obtain hydrosol and ginger essential oil;
s5, solid-liquid separation: performing solid-liquid kneading separation on the material subjected to high-temperature hydrolysis to obtain water and ginger straw shreds, performing step S6 on the ginger straw shreds, and treating the water in a water treatment system;
s6, normal-temperature hydrolysis: the separated ginger straw shreds are put into a normal-temperature hydrolysis tank to be mechanically stirred and separated and cleaned at normal temperature;
s7, solid-liquid separation: carrying out solid-liquid kneading separation on the materials in the normal-temperature hydrolysis tank to obtain water and ginger straw shreds, carrying out step S8 on the ginger straw shreds, and treating the water in a water treatment system;
s8, grinding: and (5) pulping by using a high-concentration pulping machine to obtain paper pulp.
The following is a further optimization of the above technical solution of the present invention:
in the step S1, the ginger straw raw material is cut by a shredder to obtain a ginger straw crushed body, and the length of the ginger straw crushed body is 5 cm-10 cm.
Further optimization: in the step S2, the straw crushed bodies are processed into ginger straw shreds by adopting a crushing and kneading machine, and the length of the ginger straw shreds is 2 cm-5 cm.
Further optimization: in step S4, the high-temperature aerobic cooking comprises the following steps:
g1, conveying the cleaned ginger straw shreds into a high-temperature aerobic hydrolysis tank, wherein the adding proportion of water and the ginger straw shreds in the hydrolysis tank is 10;
and G2, heating the ginger straw shreds and the water in the high-temperature hydrolysis tank to 85-95 ℃, keeping the ginger straw shreds in the hydrolysis tank for 2 hours, and accelerating the oxidation, softening and hydrolysis of the straws and the output of steam by using an aeration, oxygenation and stirring method.
Further optimization: in step S4, the condensation extraction includes the following steps:
t1, guiding steam generated in the high-temperature hydrolysis tank to a condensing tank, cooling to 18-22 ℃, and condensing the steam into an oil-water mixture;
and T2, conveying the oil-water mixture to an oil-water separator for extracting ginger essential oil.
And (4) further optimizing: in the step S6, the adding proportion of water and the ginger straw shreds in the normal-temperature hydrolysis tank is 10.
Further optimization: and step S8, grinding the pulp by adopting 2 high-concentration pulping machines which are arranged in series, and dewatering the pulp after grinding the pulp to reduce the water content of the material to 60 percent so as to obtain the paper pulp.
Further optimization: the water treatment system comprises a stacking screw machine and an air flotation machine, the stacking screw machine is conveyed to the sedimentation tank to be subjected to primary flocculation filtration, then the air flotation machine is used for performing flocculation air flotation treatment, filtered clean water enters a clean water tank to flow back for continuous use, and filtered impurities are used as raw materials of nutrient soil and organic fertilizers after fermentation treatment. The marsh gas generated in the fermentation process can be used by a steam generator and used for supplying heat to the high-temperature hydrolysis tank.
The invention adopts the technical scheme, the conception is ingenious, the water used in the whole production method is recycled, no sewage is discharged, the energy consumption is reduced, the production method is completely clean, the problem of sewage treatment does not exist, the production method does not damage plant fibers, and the produced paper pulp product does not contain any toxic and harmful chemical agent and is completely green and environment-friendly paper pulp.
And raw materials of ginger essential oil, nutrient soil and organic fertilizer can be produced, ginger straws are fully utilized, waste is changed into valuable, and the problem that the air pollution caused by burning ginger seedlings is reduced. Meanwhile, the ginger straw is converted into raw materials, so that the income of farmers is increased.
The method for high-value utilization of the ginger straws, provided by the invention, has the advantages of low overall energy consumption and simple production process, and can improve the use effect and the economic benefit of enterprises.
The invention is further illustrated with reference to the following figures and examples.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the embodiment of the present invention.
Detailed Description
Example 1: referring to fig. 1, a method for high-value utilization of ginger straw is carried out according to the following steps:
s1, crushing: the ginger straw raw material is put into a shredder to be smashed into a ginger straw smashing body, and the length of the ginger straw smashing body is 5cm.
S2, kneading: conveying the crushed ginger straw crushed bodies to a silk kneading machine through a conveying belt for kneading; and processing the ginger straw crushed bodies into ginger straw shreds, wherein the length of the ginger straw shreds is 2cm.
S3, cleaning: conveying the shredded ginger straws to a cleaning pool by a conveying belt for cleaning.
And S3, cleaning the ginger straw shreds with clear water, and when cleaning with the clear water, cleaning the ginger straw shreds with the clear water to remove impurities such as soil, gravels and the like mixed in the ginger straw shreds, so that the ginger straw shreds are cleaner.
S4, high-temperature hydrolysis: the high-temperature hydrolysis process comprises a high-temperature aerobic cooking step and a condensation extraction step.
Wherein the high-temperature aerobic cooking step comprises:
g1, conveying the cleaned ginger straw shreds to a high-temperature hydrolysis tank through a material lifting conveyor, wherein the high-temperature hydrolysis tank is a closed hydrolysis tank, and the adding proportion of water to the ginger straw shreds in the high-temperature hydrolysis tank is 10.
And G2, heating the ginger straw shreds and water in the high-temperature hydrolysis tank to 85 ℃, accelerating the oxidation, softening and hydrolysis of the straws and the output of steam by using an aeration, oxygenation and stirring method, and keeping the ginger straw shreds in the hydrolysis tank for 1.5 hours.
By the design, when the temperature of the materials and water in the high-temperature hydrolysis tank is heated to 85 ℃, the ginger straw shreds can be steamed at high temperature, and the ginger essential oil in the ginger straw shreds is extracted.
The condensation extraction step comprises:
and T1, guiding steam generated in the high-temperature hydrolysis tank to a condensing tank, introducing the ginger essential oil into the condensing tank along with the steam, cooling the steam in the condensing tank to 18 ℃, and condensing the steam into an oil-water mixture.
And T2, conveying the oil-water mixture into an oil-water separator for oil-water separation, and further extracting ginger essential oil.
S5, solid-liquid separation: and (2) kneading and conveying the materials in the high-temperature hydrolysis tank into a solid-liquid separator through a screw pump, obtaining water and ginger straw shreds after the solid-liquid kneading and separating are completed, refluxing the high-temperature water into the hydrolysis tank, recycling the high-temperature water for 5 times in each tank for testing in order to save energy, treating the thickened water in a water treatment system, continuously returning the treated water to the tank for use, and carrying out the step S6 on the ginger straw shreds.
In the step S5, the water treatment system comprises a screw stacking machine and an air flotation machine, water obtained through solid-liquid separation is guided to the screw stacking machine for primary flocculation filtration, then the air flotation machine is adopted for air flotation filtration treatment, filtered clean water enters a clean water tank and then flows back to the high-temperature hydrolysis tank for continuous use, and filtered organic matters and other impurities are subjected to fermentation treatment and used for manufacturing nutrient soil and organic fertilizers
S6, normal-temperature hydrolysis: the normal temperature hydrolysis tank is a closed hydrolysis tank, the adding proportion of water and the ginger straw shreds in the normal temperature hydrolysis tank is 10.
By the design, the normal-temperature hydrolysis process is adopted, so that the ginger straw shreds can be hydrolyzed and cleaned again, and the ginger straw shreds are cleaner.
S7, solid-liquid separation: and (3) kneading and conveying the materials in the normal-temperature hydrolysis tank into a solid-liquid separator through a screw pump, carrying out solid-liquid kneading separation again, obtaining water and ginger straw shreds after the separation is finished, refluxing the water into the normal-temperature hydrolysis tank for recycling, treating the water in a water treatment system after the water is recycled in four tanks, and carrying out the step S8 on the ginger straw shreds.
In the step S7, the water treatment system comprises a screw stacking machine and an air floatation machine, water obtained through solid-liquid separation is guided to a sedimentation tank and then is conveyed to the screw stacking machine for primary flocculation filtration, flocculation air floatation treatment is carried out through the air floatation machine, filtered water flows back and continues to be used after entering a clean water tank, and filtered impurities are used as raw materials of nutrient soil and organic fertilizers after being subjected to fermentation treatment. The marsh gas generated in the fermentation process can be used by a steam generator and used for supplying heat to the high-temperature hydrolysis tank.
S8, grinding: and 2 high-concentration pulping machines which are arranged in series are adopted for pulping, dehydration is carried out after pulping so that the moisture content of the material is reduced to 60 percent to obtain paper pulp, and redundant water in the dehydration procedure flows back to the normal-temperature hydrolysis tank for continuous use after passing through a water treatment system.
And in the step S8, the water treatment system comprises a screw stacking machine and an air flotation machine, redundant water in the dehydration process is guided to a sedimentation tank and then is conveyed to the screw stacking machine for preliminary flocculation filtration, then flocculation air flotation treatment is carried out through the air flotation machine, filtered clear water enters a clear water tank and continuously flows back to a normal-temperature hydrolysis tank for continuous use, and filtered impurities are used as raw materials of nutrient soil and organic fertilizers after fermentation treatment. The marsh gas generated in the fermentation process can be used by a steam generator and used for supplying heat to the high-temperature hydrolysis tank.
And (4) performing fermentation treatment on the impurities filtered out in the water treatment systems in the steps S3, S5 and S7 and the step S8 to obtain the raw materials of nutrient soil and organic fertilizer.
Example 2: referring to fig. 1, a method for high-value utilization of ginger straw is performed according to the following steps:
s1, crushing: the ginger straw raw material is put into a shredder to be smashed into ginger straw smashing bodies, and the length of each ginger straw smashing body is 8cm.
S2, kneading: conveying the crushed ginger straw crushed bodies to a silk kneading machine through a conveying belt for kneading; and processing the ginger straw crushed bodies into ginger straw shreds, wherein the length of the ginger straw shreds is 3cm.
S3, cleaning: conveying the shredded ginger straws to a cleaning pool by a conveying belt for cleaning.
And S3, cleaning the shredded ginger stalks with clear water, and when cleaning with the clear water, cleaning the shredded ginger stalks with the clear water to remove impurities such as soil, gravels and the like mixed in the shredded ginger stalks, so that the shredded ginger stalks are cleaner.
S4, high-temperature hydrolysis: the high-temperature hydrolysis process comprises a high-temperature aerobic cooking step and a condensation extraction step.
Wherein the high-temperature aerobic cooking step comprises:
g1, conveying the cleaned ginger straw shreds to a high-temperature hydrolysis tank through a material lifting conveyor, wherein the high-temperature hydrolysis tank is a closed hydrolysis tank, and the adding proportion of water and the ginger straw shreds in the high-temperature hydrolysis tank is 11.
And G2, heating the ginger straw shreds and water in the high-temperature hydrolysis tank to 90 ℃, accelerating the oxidation, softening and hydrolysis of the straws and the output of steam by using an aeration, oxygenation and stirring method, and keeping the ginger straw shreds in the hydrolysis tank for 2.5 hours.
By the design, when the temperature of the materials and the water in the high-temperature hydrolysis tank is heated to 90 ℃, the ginger straw shreds can be steamed at high temperature, and the ginger essential oil in the ginger straw shreds is extracted.
The condensation extraction step comprises:
and T1, guiding steam generated in the high-temperature hydrolysis tank to a condensing tank, introducing the ginger essential oil into the condensing tank along with the steam, cooling the steam in the condensing tank to 20 ℃, and condensing the steam into an oil-water mixture.
And T2, conveying the oil-water mixture to an oil-water separator for oil-water separation, and further extracting the ginger essential oil.
S5, solid-liquid separation: and (3) kneading and conveying the materials in the high-temperature hydrolysis tank into a solid-liquid separator through a screw pump, kneading and separating the solid and the liquid to obtain water and ginger straw shreds, refluxing the high-temperature water into the hydrolysis tank, recycling the high-temperature water for 8 times in each tank for testing in order to save energy, treating the thickened water in a water treatment system, continuously returning the treated water to the tank for use, and carrying out the step S6 on the ginger straw shreds.
In the step S5, the water treatment system comprises a screw stacking machine and an air flotation machine, water obtained by solid-liquid separation is guided to the screw stacking machine for primary flocculation filtration, then the air flotation machine is adopted for air flotation filtration treatment, filtered clear water enters a clear water tank and then flows back to a high-temperature hydrolysis tank for continuous use, and filtered organic matters and other impurities are subjected to fermentation treatment and used for manufacturing nutrient soil and organic fertilizers
S6, normal-temperature hydrolysis: the normal temperature hydrolysis tank is a closed hydrolysis tank, the adding proportion of water and the ginger straw shreds in the normal temperature hydrolysis tank is 11. By the design, the normal-temperature hydrolysis process is adopted, and the ginger straw shreds can be hydrolyzed and cleaned again, so that the ginger straw shreds are cleaner.
S7, solid-liquid separation: and (3) kneading and conveying the materials in the normal-temperature hydrolysis tank into a solid-liquid separator through a screw pump, carrying out solid-liquid kneading separation again, obtaining water and ginger straw shreds after the separation is finished, refluxing the water into the normal-temperature hydrolysis tank for recycling, treating the water in a water treatment system after the water is recycled in four tanks, and carrying out the step S8 on the ginger straw shreds.
In the step S7, the water treatment system comprises a screw stacking machine and an air floatation machine, water obtained through solid-liquid separation is guided to a sedimentation tank and then conveyed to the screw stacking machine for preliminary flocculation filtration, then flocculation air floatation treatment is carried out through the air floatation machine, filtered water flows back to a clean water tank and is continuously used, and filtered impurities are used as raw materials of nutrient soil and organic fertilizers after fermentation treatment. The marsh gas generated in the fermentation process can be used by a steam generator and used for supplying heat to the high-temperature hydrolysis tank.
S8, grinding: and 2 high-concentration pulping machines which are arranged in series are adopted for pulping, dehydration is carried out after pulping so that the moisture content of the material is reduced to 60 percent to obtain paper pulp, and redundant water in the dehydration procedure flows back to the normal-temperature hydrolysis tank for continuous use after passing through a water treatment system.
And in the step S8, the water treatment system comprises a screw stacking machine and an air flotation machine, redundant water in the dehydration process is guided to a sedimentation tank and then is conveyed to the screw stacking machine for preliminary flocculation filtration, then flocculation air flotation treatment is carried out through the air flotation machine, filtered clear water enters a clear water tank and continuously flows back to a normal-temperature hydrolysis tank for continuous use, and filtered impurities are used as raw materials of nutrient soil and organic fertilizers after fermentation treatment. The marsh gas generated in the fermentation process can be used by a steam generator and used for supplying heat to the high-temperature hydrolysis tank.
And (4) performing fermentation treatment on the impurities filtered out in the water treatment systems in the steps S3, S5 and S7 and the step S8 to obtain the raw materials of nutrient soil and organic fertilizer.
Example 3: referring to fig. 1, a method for high-value utilization of ginger straw is performed according to the following steps:
s1, crushing: the ginger straw raw material is put into a shredder to be smashed into a ginger straw smashing body, and the length of the ginger straw smashing body is 10cm.
S2, kneading: the crushed ginger straw crushed bodies are conveyed into a silk rolling machine through a conveyor belt to be rolled; and processing the ginger straw crushed bodies into ginger straw shreds, wherein the length of the ginger straw shreds is 5cm.
S3, cleaning: conveying the shredded ginger straws to a cleaning pool by a conveying belt for cleaning.
And S3, cleaning the ginger straw shreds with clear water, and when cleaning with the clear water, cleaning the ginger straw shreds with the clear water to remove impurities such as soil, gravels and the like mixed in the ginger straw shreds, so that the ginger straw shreds are cleaner.
S4, high-temperature hydrolysis: the high-temperature hydrolysis process comprises a high-temperature aerobic cooking step and a condensation extraction step.
Wherein the high-temperature aerobic cooking step comprises:
g1, conveying the cleaned ginger straw shreds to a high-temperature hydrolysis tank through a material lifting conveyor, wherein the high-temperature hydrolysis tank is a closed hydrolysis tank, and the adding proportion of water and the ginger straw shreds in the high-temperature hydrolysis tank is 12.
And G2, heating the ginger straw shreds and water in the high-temperature hydrolysis tank to 95 ℃, accelerating the oxidation, softening and hydrolysis of the straws and the output of steam by using an aeration, oxygenation and stirring method, and keeping the ginger straw shreds in the hydrolysis tank for 2 hours.
Design like this, when heating the temperature of material and water in the pyrohydrolysis jar to 95 ℃, can carry out the high temperature cooking to the ginger straw silk to extract the ginger essential oil in the ginger straw silk.
The condensation extraction step comprises:
and T1, guiding steam generated in the high-temperature hydrolysis tank to a condensing tank, introducing the ginger essential oil into the condensing tank along with the steam, cooling the steam in the condensing tank to 22 ℃, and condensing the steam into an oil-water mixture.
And T2, conveying the oil-water mixture to an oil-water separator for oil-water separation, and further extracting the ginger essential oil.
S5, solid-liquid separation: and (3) kneading and conveying the materials in the high-temperature hydrolysis tank into a solid-liquid separator through a screw pump, obtaining water and ginger straw shreds after the solid-liquid kneading and separating are completed, refluxing the high-temperature water into the hydrolysis tank, recycling the high-temperature water for 10 times in each tank for testing in order to save energy, treating the thickened water in a water treatment system, continuously returning the treated water to the tank for use, and carrying out the step S6 on the ginger straw shreds.
In the step S5, the water treatment system comprises a screw stacking machine and an air flotation machine, water obtained through solid-liquid separation is guided to the screw stacking machine for primary flocculation filtration, then the air flotation machine is adopted for air flotation filtration treatment, filtered clean water enters a clean water tank and then flows back to the high-temperature hydrolysis tank for continuous use, and filtered organic matters and other impurities are subjected to fermentation treatment and used for manufacturing nutrient soil and organic fertilizers
S6, normal-temperature hydrolysis: the normal temperature hydrolysis tank is a closed hydrolysis tank, the adding proportion of water and the ginger straw shreds in the normal temperature hydrolysis tank is 12. By the design, the normal-temperature hydrolysis process is adopted, so that the ginger straw shreds can be hydrolyzed and cleaned again, and the ginger straw shreds are cleaner.
S7, solid-liquid separation: and (3) kneading and conveying the materials in the normal-temperature hydrolysis tank into a solid-liquid separator through a screw pump, carrying out solid-liquid kneading separation again, obtaining water and the ginger straw shreds after separation, refluxing the water into the normal-temperature hydrolysis tank for recycling, feeding the water into a water treatment system for treatment after recycling the water in a 5-tank, and carrying out step S8 on the ginger straw shreds.
In the step S7, the water treatment system comprises a screw stacking machine and an air floatation machine, water obtained through solid-liquid separation is guided to a sedimentation tank and then conveyed to the screw stacking machine for preliminary flocculation filtration, then flocculation air floatation treatment is carried out through the air floatation machine, filtered water flows back to a clean water tank and is continuously used, and filtered impurities are used as raw materials of nutrient soil and organic fertilizers after fermentation treatment. The marsh gas generated in the fermentation process can be used by a steam generator and used for supplying heat to the high-temperature hydrolysis tank.
S8, grinding: 2 high-concentration pulping machines arranged in series are adopted for pulping, dehydration is carried out after pulping is finished to reduce the moisture content of the materials to 60% so as to obtain paper pulp, and redundant water in the dehydration process flows back to the normal-temperature hydrolysis tank for continuous use after passing through a water treatment system.
In the step S8, the water treatment system comprises a screw stacking machine and an air flotation machine, redundant water in the dehydration process is guided to a sedimentation tank and then is conveyed to the screw stacking machine for primary flocculation and filtration, then flocculation air flotation treatment is carried out through the air flotation machine, filtered clean water enters a clean water tank and continuously flows back to a normal-temperature hydrolysis tank for continuous use, and filtered impurities are used as raw materials of nutrient soil and organic fertilizer after fermentation treatment; the marsh gas generated in the fermentation process can be used by a steam generator and used for supplying heat to the high-temperature hydrolysis tank.
The pulps obtained in examples 1 to 3 were examined and found to have the following indexes
Absolutely dry Jiang Jiegan pulp yield: 50 to 58 percent; and (3) detection of the pH value: 6.8-7.5; detecting the whiteness of the paper pulp: 42; and (3) paper pulp fracture length: 4-4.5km; pulp beating degree SR:22-24; detecting the water content of paper pulp: 60 percent; detecting ash content of paper pulp: 5 percent.
Compared with the traditional chemical pulping process, the method saves electricity by 66 percent, coal by 100 percent, water by 99.8 percent and raw material plant resources by more than 30 percent.
It will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in the embodiments described above without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims.
Claims (5)
1. A method for high-value utilization of ginger straws is characterized by comprising the following steps: the method comprises the following steps:
s1, crushing: cutting the ginger straw raw material into ginger straw crushed bodies;
in the step S1, a shredder is adopted to cut the ginger straw raw material to obtain a ginger straw crushed body, and the length of the ginger straw crushed body is 5 cm-10 cm;
s2, kneading: crushing and kneading the cut ginger straw crushed body to obtain ginger straw shreds;
in the step S2, the crushed bodies of the straws are processed into the ginger straw shreds by a shred kneading machine, and the length of the ginger straw shreds is 2cm to 5cm;
s3, cleaning: conveying the ginger straw shreds into a cleaning pool for cleaning;
s4, high-temperature hydrolysis: conveying the cleaned ginger straw shreds into a high-temperature hydrolysis tank, carrying out high-temperature aerobic cooking on the ginger straw shreds, accelerating the oxidation and softening hydrolysis of the straws and the output of steam by using an aeration oxygenation method, and condensing and extracting the collected steam to obtain hydrosol and ginger essential oil;
in step S4, the high-temperature aerobic cooking comprises the following steps:
g1, conveying the cleaned ginger straw shreds into a high-temperature hydrolysis tank, wherein the adding proportion of water to the ginger straw shreds in the high-temperature hydrolysis tank is 10;
g2, heating the ginger straw shreds and the water in the high-temperature hydrolysis tank to 85-95 ℃, keeping the ginger straw shreds in the high-temperature hydrolysis tank for 1.5-2.5 hours, and accelerating the oxidation and softening hydrolysis of the straws and the output of steam by using an aeration-oxygenation stirring method;
in step S4, the condensation extraction includes the following steps:
t1, guiding steam generated in the high-temperature hydrolysis tank to a condensing tank, cooling to 18-22 ℃, and condensing the steam into an oil-water mixture;
t2, conveying the oil-water mixture to an oil-water separator for extracting ginger essential oil;
s5, solid-liquid separation: carrying out solid-liquid kneading separation on the materials subjected to high-temperature aerobic hydrolysis to obtain water and ginger straw shreds, carrying out step S6 on the ginger straw shreds, and treating the water in a water treatment system;
s6, normal-temperature hydrolysis: the separated ginger straw shreds are put into a normal-temperature hydrolysis tank to be mechanically stirred and separated and cleaned at normal temperature;
s7, solid-liquid separation: performing solid-liquid kneading separation on the materials in the normal-temperature hydrolysis tank to obtain water and the ginger straw shreds, performing step S8 on the ginger straw shreds, and treating the water in a water treatment system;
s8, grinding: and (5) pulping by using a high-concentration pulping machine to obtain paper pulp.
2. The method for high-value utilization of ginger straw according to claim 1, wherein: in the step S6, the adding proportion of water and the ginger straw shreds in the normal-temperature hydrolysis tank is 10.
3. The method for high-value utilization of ginger straw according to claim 2, wherein: and step S8, grinding the pulp by adopting 2-4 high-concentration pulping machines which are arranged in series, and dewatering the pulp after grinding the pulp to reduce the water content of the material to 60 percent so as to obtain the paper pulp.
4. The method for high-value utilization of ginger straw according to claim 3, wherein: the water treatment system comprises a spiral shell stacking machine and an air floatation machine, the spiral shell stacking machine is conveyed to the sedimentation tank to be subjected to primary flocculation filtration, then the air floatation machine is used for performing flocculation air floatation treatment, clear water and impurities are filtered out, and the clear water enters a clear water tank to flow back for continuous use.
5. The method for high-value utilization of ginger straw according to claim 4, wherein the method comprises the following steps: the filtered impurities are used as raw materials of nutrient soil and organic fertilizer after fermentation treatment; the marsh gas generated in the fermentation process can be used by a steam generator and used for supplying heat to the high-temperature hydrolysis tank.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102277775A (en) * | 2010-10-27 | 2011-12-14 | 山东博瑞格生物资源制品有限公司 | Method for making paper pulp by using ginger seedling and paper pulp made by using method |
| WO2016179846A1 (en) * | 2015-05-08 | 2016-11-17 | 白博 | Zero discharge process of pulping waste liquid of all-cotton straw chemi-mechanical pulp |
| CN109628220A (en) * | 2017-10-09 | 2019-04-16 | 肖梅 | A kind of extracting method of Jiang Miao essential oil |
| CN110203926A (en) * | 2019-07-04 | 2019-09-06 | 山东大学 | A method of comprehensive utilization ginger stalk |
| CN110791990A (en) * | 2019-10-25 | 2020-02-14 | 刘同林 | Method for comprehensively utilizing straws |
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| EP1707668A1 (en) * | 2003-12-25 | 2006-10-04 | Xiuquan Mei | Closed cycle zero discharge oxidizing pulping process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277775A (en) * | 2010-10-27 | 2011-12-14 | 山东博瑞格生物资源制品有限公司 | Method for making paper pulp by using ginger seedling and paper pulp made by using method |
| WO2016179846A1 (en) * | 2015-05-08 | 2016-11-17 | 白博 | Zero discharge process of pulping waste liquid of all-cotton straw chemi-mechanical pulp |
| CN109628220A (en) * | 2017-10-09 | 2019-04-16 | 肖梅 | A kind of extracting method of Jiang Miao essential oil |
| CN110203926A (en) * | 2019-07-04 | 2019-09-06 | 山东大学 | A method of comprehensive utilization ginger stalk |
| CN110791990A (en) * | 2019-10-25 | 2020-02-14 | 刘同林 | Method for comprehensively utilizing straws |
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