CN112980536A - Method for preparing biomass by using pulping black liquor - Google Patents
Method for preparing biomass by using pulping black liquor Download PDFInfo
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- CN112980536A CN112980536A CN202110247613.5A CN202110247613A CN112980536A CN 112980536 A CN112980536 A CN 112980536A CN 202110247613 A CN202110247613 A CN 202110247613A CN 112980536 A CN112980536 A CN 112980536A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/46—Solid fuels essentially based on materials of non-mineral origin on sewage, house, or town refuse
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/10—Concentrating spent liquor by evaporation
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
- C10L2230/22—Function and purpose of a components of a fuel or the composition as a whole for improving fuel economy or fuel efficiency
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/08—Drying or removing water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/24—Mixing, stirring of fuel components
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/32—Molding or moulds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/54—Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel
- C10L2290/543—Distillation, fractionation or rectification for separating fractions, components or impurities during preparation or upgrading of a fuel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention provides a method for preparing biomass by using pulping black liquor, which comprises the steps of dehydration treatment, high-temperature evaporation, dry material preparation, material mixing, rotary evaporation and granulation, and specifically comprises the steps of extrusion dehydration, high-temperature evaporation and concentration to obtain the concentrated black liquor, scientifically and reasonably mixing the concentrated black liquor and dry materials, heating and rotary evaporation by natural gas combustion, and granulation to finally prepare biomass granular fuel.
Description
Technical Field
The invention belongs to the technical field of pulping, and particularly relates to a method for preparing biomass by using pulping black liquor.
Background
The alkaline pulping process includes chemical pulping, semi-chemical pulping or chemical mechanical pulping, and the main chemical reaction is that caustic soda reacts with lignin in the material to produce alkali lignin which is dissolved in alkali liquor. The waste liquid obtained by cooking contains a large amount of degradation products such as lignin, hemicellulose and the like, pigments, pentose, pectin substances, fat wax, residual alkali and other dissolved substances, and the color of the waste liquid is brownish black, so the cooking waste water is also called black liquid, and the solid content of the black liquid in the pulping process is about 65-70% of organic matters and 30-35% of inorganic matters. The wastewater with high concentration and large water volume can not be directly discharged without treatment, and organic matters such as lignin and the like contained in the wastewater also have certain recovery value.
CN102650109B discloses a method for converting pulping black liquor into powder containing fulvic acid and amino acid by using compound microorganisms, which comprises adding compound strains into the pulping black liquor for biotransformation, reserving 30% of strains as the strains to continue adding the alkaline pulping black liquor for biotransformation, evaporating and concentrating the rest liquor, spraying and drying to obtain powder, repeating the steps for multiple times, converting the black liquor into fulvic acid and amino acid, and adding a nutrient source, and the like, and has the problem of low utilization rate.
CN110372883B provides a method for extracting lignin and silicic acid from black liquor, which comprises adjusting the pH of black liquor for multiple times, performing enzymolysis to remove cellulose and hemicellulose that are not removed from the black liquor, to obtain high-purity silicic acid, high-purity acid-soluble lignin, high-purity acid-insoluble lignin and small-molecule lignin salt, but only extracting lignin and silicic acid components, the black liquor still contains a large amount of organic components and is difficult to recover, the comprehensive utilization rate of the black liquor is not high, the process is complex, the cost is high, and industrialization is not easy to achieve.
Disclosure of Invention
In order to solve the problems in the prior art and further optimize the prior process, the invention provides a method for preparing biomass by using pulping black liquor, so as to realize the purpose of preparing the pulping black liquor into the biomass, changing the black liquor into valuables, and achieving the biomass yield of 3.5-4 tons/ton of pulping black liquor and the biomass heat value of 20.5-21.4 MJ/kg.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for preparing biomass by using pulping black liquor is characterized by comprising the steps of dehydration treatment, high-temperature evaporation, dry material preparation, material mixing, rotary evaporation and granulation;
the concentration of the pulping black liquor is 2-5wt%, and the viscosity is 10-60mpa & s;
the high-temperature evaporation is carried out at the temperature of 120-;
the dry method is used for preparing materials, and the mixing proportion of the sand and the stone, the soil and the grass leaves is 5-8: 12-15: 1-2;
preparing materials by the dry method, wherein the diameter of the dry material is not more than 1cm, and the length of the cut grass is 3-5 cm;
mixing materials, namely adding water into a dry material to adjust the concentration of the dry material to obtain a wet material, wherein the concentration of the wet material is 10-15 wt%;
the mixing proportion of the mixed materials, namely the thick black liquor and the mixed wet materials is 1: 3-4;
the rotary evaporation has the latent heat of evaporation of 550-560Kcal/kg and is carried out until the water content is 10-20 percent;
the rotary evaporation is carried out, wherein the inlet temperature of the main machine of the multi-ring roller dryer is 400-plus 500 ℃, and the outlet temperature is 100-plus 110 ℃;
the granulation needs to be carried out by adding a water reducing agent, wherein the water reducing agent is a modified maleic anhydride water reducing agent, and the amount of the water reducing agent accounts for 0.8-2.5wt% of the total amount of the mixture;
the preparation method of the water reducing agent comprises the following steps:
adding maleic anhydride into ethanol, stirring for dissolving, introducing an ice-water mixture at about 4 ℃ into a prepared kettle coil, cooling, adding a sodium hydroxide solution while cooling, controlling the temperature of the solution to be not more than 40 ℃, adjusting the pH value of a system to 10-12, adding certain urea, stirring for reacting for 7-8h, filtering, washing and drying to obtain a modified maleic anhydride water reducer;
the modified maleic anhydride water reducing agent has the molar ratio of maleic anhydride to urea of 1: 2-2.2;
the water content of the prepared biomass is 0.5-3% after granulation, and the particle size is 3-5 mm.
By adopting the technical scheme, the invention has the beneficial effects that:
1. by adopting the preparation method, the pulping black liquor is prepared into the biomass, so that the problems of environmental pollution and difficult treatment of the pulping black liquor are solved, the black liquor is changed into valuable, and the comprehensive utilization value of the pulping black liquor is improved;
2. by adopting the preparation method, the pulping black liquor is prepared into biomass, the biomass yield reaches 3.5-4 tons per ton of pulping black liquor, and the biomass yield is higher;
3. the biomass prepared by the preparation method has high heat value and good combustion efficiency, and the density is 1.34-1.37 multiplied by 103kg/m3, heat value of 20.5-21.4MJ/kg, ash content of 8-10%;
4. the biomass prepared by the preparation method has the ignition time of 10-13s and the comprehensive combustion characteristic index of 2.30-2.55 multiplied by 107Excellent combustion performance;
5. by adopting the preparation method, the pulping black liquor can be completely recycled, the waste water can be recycled, and the prepared biomass product is used as a byproduct, so that additional benefits are increased.
The specific implementation mode is as follows:
the invention is further illustrated below with reference to specific examples.
Example 1A method for preparing Biomass Using pulping Black liquor
The method for preparing the biomass by using the pulping black liquor comprises the steps of dehydration treatment, high-temperature evaporation, dry-method material preparation, material mixing, rotary evaporation and granulation, and specifically comprises the following steps:
1. dehydration treatment
Carrying out extrusion dehydration treatment on pulping black liquor generated by a wheat straw biochemical mechanical pulp preparation system;
the concentration of the pulping black liquor is 2.0wt%, and the viscosity is 20mpa & s;
the dehydration treatment is carried out until the concentration of the black liquor is 20 percent;
2. high temperature evaporation
Pumping the black liquor into an evaporation kettle for high-temperature evaporation, and further concentrating the black liquor to obtain concentrated black liquor;
the high-temperature evaporation is carried out at the temperature of 120 ℃;
evaporating at high temperature until the concentration of the concentrated black liquor is 50wt% and the viscosity is 4110mpa · s;
3. dry method for preparing material
Respectively crushing and screening dry materials such as sand, soil, grass and leaves, mixing the materials according to a proportion, and conveying the mixture to a biomass preparation system through an auger system;
the mixing proportion of the dry materials, sand and stone, soil and grass leaves is 5: 12: 1;
the diameter of the dry material is not more than 1cm, and the length of the cut grass is 3-5 cm;
4. mixing material
Adding water into the dry material to adjust the concentration of the dry material to obtain a 10% wet mixed material, adding the treated concentrated black liquor into the wet mixed material, and stirring and mixing the mixture at the speed of 50 rpm;
the mixing proportion of the mixed materials, namely the thick black liquor and the mixed wet materials is 1: 3;
5. rotary evaporation
Performing rotary evaporation on the mixture by adopting a multi-ring roller dryer, preparing a double-shell gas furnace, and supplying heat by adopting natural gas combustion to dry the mixture until the water content is 20%;
the inlet temperature of the main machine of the multi-ring roller dryer is 400 ℃, and the outlet temperature of the main machine of the multi-ring roller dryer is 100 ℃;
the rotary evaporation has the internal wet bulb temperature of 70 ℃, the evaporation latent heat of 560Kcal/kg and the treatment capacity of 10 t/h;
6. granulating
Adding a small amount of water reducing agent into the mixture, placing the mixture into a dryer, drying until the water content is 1.5%, and transferring the mixture into a granulator to prepare a cylindrical strip-shaped biomass finished product with the particle size of 3-5 mm;
the water reducing agent is a modified maleic anhydride water reducing agent, and the amount of the water reducing agent accounts for 0.8wt% of the total amount of the mixture;
the preparation method of the water reducing agent comprises the following steps:
adding 19.6kg of maleic anhydride into 200kg of ethanol, stirring and dissolving, introducing an ice-water mixture at about 4 ℃ into a prepared kettle coil, cooling, adding a sodium hydroxide solution while cooling, controlling the temperature of the solution to be not more than 40 ℃, adjusting the pH value of the system to 12, adding certain urea, stirring and reacting for 8 hours, filtering, washing and drying to obtain a modified maleic anhydride water reducer;
the mol ratio of the modified maleic anhydride to the urea is 1: 2.0.
The preparation method of the embodiment 1 of the invention has simple process, can realize the complete recycling of the pulping black liquor, and the yield of the prepared biomass reaches 3.5 tons per ton of the pulping black liquor, and the density is 1.35 multiplied by 103kg/m3, heat value of 21.4MJ/kg, ash content of 8.2%, ignition time of the biomass of 11.5s, and comprehensive combustion characteristic index of 2.55 × 107The fuel has excellent combustion performance.
Example 2 method for preparing biomass using pulping black liquor
The method for preparing the biomass by using the pulping black liquor comprises the steps of dehydration treatment, high-temperature evaporation, dry-method material preparation, material mixing, rotary evaporation and granulation, and specifically comprises the following steps:
1. dehydration treatment
Carrying out extrusion dehydration treatment on pulping black liquor generated by a wheat straw biochemical mechanical pulp preparation system;
the concentration of the pulping black liquor is 2.8wt%, and the viscosity is 32mpa & s;
the dehydration treatment is carried out until the concentration of black liquor reaches 25 percent;
2. high temperature evaporation
Pumping the black liquor into an evaporation kettle for high-temperature evaporation, and further concentrating the black liquor to obtain concentrated black liquor;
the high-temperature evaporation is carried out at the temperature of 120 ℃;
evaporating at high temperature until the concentration of the concentrated black liquor is 55wt% and the viscosity is 4520mpa & s;
3. dry method for preparing material
Respectively crushing and screening dry materials such as sand, soil, grass and leaves, mixing the materials according to a proportion, and conveying the mixture to a biomass preparation system through an auger system;
the mixing proportion of the dry materials, sand and stone, soil and grass leaves is 8: 15: 1;
the diameter of the dry material is not more than 1cm, and the length of the cut grass is 3-5 cm;
4. mixing material
Adding water into the dry material to adjust the concentration of the dry material to obtain a 12% wet mixed material, adding the treated concentrated black liquor into the wet mixed material, and stirring and mixing the mixture at the speed of 50 rpm;
the mixing proportion of the mixed materials, namely the thick black liquor and the mixed wet materials is 1: 3;
5. rotary evaporation
Performing rotary evaporation on the mixture by using a multi-ring roller dryer, and drying the mixture to a water content of 16% by using a double-shell gas furnace and supplying heat by using natural gas combustion;
the inlet temperature of the main machine of the multi-ring roller dryer is 500 ℃, and the outlet temperature of the main machine of the multi-ring roller dryer is 100 ℃;
the rotary evaporation has the advantages that the temperature of a wet bulb in the machine is 60 ℃, the latent heat of evaporation is 550Kcal/kg, and the treatment capacity is 10 t/h;
6. granulating
Adding a small amount of water reducing agent into the mixture, placing the mixture into a dryer, drying until the water content is 2.4%, and transferring the mixture into a granulator to prepare a cylindrical strip-shaped biomass finished product with the particle size of 3-5 mm;
the water reducing agent is a modified maleic anhydride water reducing agent, and the amount of the water reducing agent accounts for 1.5wt% of the total amount of the mixture;
the preparation method of the water reducing agent comprises the following steps:
adding 19.6kg of maleic anhydride into 200kg of ethanol, stirring and dissolving, introducing an ice-water mixture at about 4 ℃ into a prepared kettle coil, cooling, adding a sodium hydroxide solution while cooling, controlling the temperature of the solution to be not more than 40 ℃, adjusting the pH value of the system to 12, adding certain urea, stirring and reacting for 8 hours, filtering, washing and drying to obtain a modified maleic anhydride water reducer;
the mol ratio of the modified maleic anhydride to the urea is 1: 2.0.
The preparation method of the embodiment 2 of the invention has simple process, can realize the complete recycling of the pulping black liquor, and the yield of the prepared biomass reaches 3.8 tons/ton pulping black liquor, and is denseDegree of 1.37X 103kg/m3, heat value of 20.5MJ/kg, ash content of 9.7%, ignition time of the biomass of 12.0s, and comprehensive combustion characteristic index of 2.35 × 107The fuel has excellent combustion performance.
Example 3A method for preparing Biomass Using pulping Black liquor
The method for preparing the biomass by using the pulping black liquor comprises the steps of dehydration treatment, high-temperature evaporation, dry-method material preparation, material mixing, rotary evaporation and granulation, and specifically comprises the following steps:
1. dehydration treatment
Carrying out extrusion dehydration treatment on pulping black liquor generated by a wheat straw biochemical mechanical pulp preparation system;
the concentration of the pulping black liquor is 3.5wt%, and the viscosity is 48mpa & s;
the dehydration treatment is carried out until the concentration of the black liquor is 30 percent;
2. high temperature evaporation
Pumping the black liquor into an evaporation kettle for high-temperature evaporation, and further concentrating the black liquor to obtain concentrated black liquor;
the high-temperature evaporation is carried out at the temperature of 120 ℃;
evaporating at high temperature until the concentration of the concentrated black liquor is 60wt% and the viscosity is 4950mpa & s;
3. dry method for preparing material
Respectively crushing and screening dry materials such as sand, soil, grass and leaves, mixing the materials according to a proportion, and conveying the mixture to a biomass preparation system through an auger system;
the mixing proportion of the dry materials, sand and stone, soil and grass leaves is 8: 12: 1;
the diameter of the dry material is not more than 1cm, and the length of the cut grass is 3-5 cm;
4. mixing material
Adding water into the dry material to adjust the concentration of the dry material to obtain a 10% wet mixed material, adding the treated concentrated black liquor into the wet mixed material, and stirring and mixing the mixture at the speed of 50 rpm;
the mixing proportion of the mixed materials, namely the thick black liquor and the mixed wet materials is 1: 4;
5. rotary evaporation
Performing rotary evaporation on the mixture by adopting a multi-ring roller dryer, preparing a double-shell gas furnace, and supplying heat by adopting natural gas combustion to dry the mixture until the water content is 15%;
the inlet temperature of the main machine of the multi-ring roller dryer is 400 ℃, and the outlet temperature of the main machine of the multi-ring roller dryer is 110 ℃;
the rotary evaporation has the advantages that the temperature of a wet bulb in the machine is 60 ℃, the latent heat of evaporation is 550Kcal/kg, and the treatment capacity is 10 t/h;
6. granulating
Adding a small amount of water reducing agent into the mixture, placing the mixture into a dryer, drying until the water content is 1.5%, and transferring the mixture into a granulator to prepare a cylindrical strip-shaped biomass finished product with the particle size of 3-5 mm;
the water reducing agent is a modified maleic anhydride water reducing agent, and the using amount of the water reducing agent accounts for 2.0wt% of the total amount of the mixture;
the preparation method of the water reducing agent comprises the following steps:
adding 19.6kg of maleic anhydride into 200kg of ethanol, stirring and dissolving, introducing an ice-water mixture at about 4 ℃ into a prepared kettle coil, cooling, adding a sodium hydroxide solution while cooling, controlling the temperature of the solution to be not more than 40 ℃, adjusting the pH value of the system to 12, adding certain urea, stirring and reacting for 8 hours, filtering, washing and drying to obtain a modified maleic anhydride water reducer;
the mol ratio of the modified maleic anhydride to the urea is 1: 2.2.
The preparation method of the embodiment 3 of the invention has simple process, can realize the complete recycling of the pulping black liquor, and the yield of the prepared biomass reaches 4.0 ton/ton pulping black liquor, and the density is 1.34 multiplied by 103kg/m3, heat value of 20.9MJ/kg, ash content of 9.1%, ignition time of the biomass of 11.0s, and comprehensive combustion characteristic index of 2.30 × 107The fuel has excellent combustion performance.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The method for preparing the biomass by using the pulping black liquor is characterized by comprising the steps of dehydration treatment, high-temperature evaporation, dry material preparation, material mixing, rotary evaporation and granulation.
2. The preparation method as claimed in claim 1, wherein the high temperature evaporation is carried out at a temperature of 120-130 ℃ until the concentration of the concentrated black liquor is 50-60wt% and the viscosity is 4000-5000 mpa-s.
3. The preparation method as claimed in claim 1, wherein the dry method is used for preparing materials, and the mixing ratio of sand, soil and grass leaves is 5-8: 12-15:1-2.
4. The preparation method of claim 1, wherein the mixing ratio of the mixed material, the thick black liquor and the wet mixed material is 1: 3-4.
5. The method as claimed in claim 1, wherein the rotary evaporation has a latent heat of evaporation of 550-560Kcal/kg and the water content is 10-20%.
6. The preparation method according to claim 1, characterized in that a water reducing agent is added in the granulation, and the water reducing agent is a modified maleic anhydride water reducing agent and is used in an amount of 0.8-2.5wt% of the total amount of the mixture.
7. The preparation method of claim 1, characterized in that the preparation method of the water reducing agent comprises the following steps:
adding maleic anhydride into ethanol, stirring for dissolving, adding a sodium hydroxide solution while cooling, controlling the temperature of the solution to be not more than 40 ℃, adjusting the pH value of the system to 10-12, adding a certain amount of urea, stirring for reacting for 7-8h, filtering, washing and drying to obtain a modified maleic anhydride water reducer; the modified maleic anhydride water reducing agent has the molar ratio of maleic anhydride to urea of 1: 2-2.2.
8. The method according to claim 4, wherein the wet mix concentration is 10 to 15 wt%.
9. The method as claimed in claim 3, wherein the dry stock has a diameter of not more than 1cm and a cut length of 3-5 cm.
10. The method of claim 1, wherein the biomass has a calorific value of 20.5 to 21.4MJ/kg and a comprehensive combustion characteristic index of 2.30 to 2.55 x 107。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117925290A (en) * | 2024-03-21 | 2024-04-26 | 山东科迈生物制浆有限公司 | Method for preparing biomass fuel from pulping waste |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5725392A (en) * | 1980-07-23 | 1982-02-10 | Hitachi Ltd | Storage of coal |
| CN101037313A (en) * | 2007-02-08 | 2007-09-19 | 朱安庆 | Polymer concrete dry-powder water-proof sticking mortar additive for construction |
| CN106010713A (en) * | 2016-06-27 | 2016-10-12 | 田东县浙缘农业科技有限公司 | High-durability biomass briquette and preparing method thereof |
| CN107629168A (en) * | 2017-09-22 | 2018-01-26 | 安徽省阜南绿原化工有限公司 | A kind of preparation method of maleic anhydride type both sexes water reducer |
-
2021
- 2021-03-06 CN CN202110247613.5A patent/CN112980536A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5725392A (en) * | 1980-07-23 | 1982-02-10 | Hitachi Ltd | Storage of coal |
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| CN107629168A (en) * | 2017-09-22 | 2018-01-26 | 安徽省阜南绿原化工有限公司 | A kind of preparation method of maleic anhydride type both sexes water reducer |
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