CN108456572B - Gas-liquid two-phase sulfonated alkali method for preparing coal water slurry additive from waste alkali liquor - Google Patents
Gas-liquid two-phase sulfonated alkali method for preparing coal water slurry additive from waste alkali liquor Download PDFInfo
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- CN108456572B CN108456572B CN201810482475.7A CN201810482475A CN108456572B CN 108456572 B CN108456572 B CN 108456572B CN 201810482475 A CN201810482475 A CN 201810482475A CN 108456572 B CN108456572 B CN 108456572B
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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
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
- C10L1/326—Coal-water suspensions
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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
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/24—Organic compounds containing sulfur, selenium and/or tellurium
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Abstract
The invention provides a method for preparing a coal water slurry additive by using gas-liquid two-phase sulfonated alkali pulping waste alkali, which relates to the field of resource utilization and environmental protection and comprises the following raw materials in parts by weight: 80-90 parts of waste alkali liquor, 40-48 parts of sulfur dioxide, 65-85 parts of phenol wastewater, 5-9 parts of hydrogen peroxide, 25-45 parts of formaldehyde and 10-20 parts of liquid alkali, and a sulfonated alkali method is adopted: adding waste alkali liquor into a reaction kettle, heating to 50-60 ℃, slowly introducing sulfur dioxide while stirring, wherein the introduction time is 20-30min until the introduction is finished; adding phenol wastewater and hydrogen peroxide into a reaction kettle, heating to 70-80 ℃, preserving heat for 1-2 hours, continuously dropwise adding formaldehyde into the reaction kettle for 20-30min, preserving heat for 2-3 hours after dropwise adding is finished, and adjusting the pH to 10 by using liquid alkali to obtain the product.
Description
Technical Field
The invention relates to the field of resource utilization and environmental protection, in particular to a method for preparing a coal water slurry additive by using gas-liquid two-phase sulfonated alkali pulping waste alkali liquor.
Background
Coal water slurry is a new clean liquid fuel which is developed in the oil crisis in the 70 th 20 th century and replaces oil with coal. The additive is prepared by processing about 70% of coal, about 30% of water and about 1% of additive through a certain process flow, so that the additive has good fluidity and stability, and is atomized by pumping to achieve the effect of stable combustion. Therefore, the coal water slurry is an ideal clean fuel and can be widely used as fuel for various boilers. The coal water slurry is added with chemical additives in the preparation process, which mainly changes the surface properties of coal particles so that the coal particles can be dispersed in water, thereby ensuring that the coal slurry has good fluidity and stability.
The phenol wastewater has high concentration, high toxicity, deep color, strong acid-base buffer property and difficult biochemical degradation, generates about 10-15t of wastewater per ton of products and causes great harm to human bodies and environment. This wastewater treatment is a recognized problem. The waste water mainly contains a large amount of inorganic substances such as sodium sulfate, sodium sulfite and the like, and incompletely separated organic intermediate products containing active groups such as-OH, -SO3H and the like, SO that if the waste water can be comprehensively utilized, the waste water treatment cost can be saved, and obvious economic benefits can be obtained.
At present, the discharge amount of the waste water and the COD discharge amount of the paper-making industry in China are the first of the discharge amounts of various industries in China. In recent years, the country continuously increases the intensity of pollution control and treatment, but is limited to various reasons such as capital, technology, environmental awareness and the like, and the problem of environmental pollution of paper-making enterprises is not well solved. The waste alkali liquor generated by cooking and pulping in the alkaline pulping process is the most main pollution source in the paper-making wastewater, accounts for about 90 percent of the pollution of the whole paper-making industry, contains a large amount of harmful substances, contains refractory lignin and derivatives thereof, is a high-alkaline complex pollution system, is easy to cause water body pollution and serious damage to the ecological environment, and belongs to dangerous waste. If the waste lye cannot be effectively treated and is directly discharged, the environment is seriously polluted, and a large amount of resources are wasted.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for preparing a coal water slurry additive by using gas-liquid two-phase sulfonated alkali pulping waste alkali, and the coal water slurry additive is prepared by recycling the waste alkali and phenol wastewater, thereby realizing resource utilization and environmental protection.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
a coal water slurry additive prepared from gas-liquid two-phase sulfonated soda pulping waste alkali liquor is prepared from the following raw materials in parts by weight: 80-90 parts of waste alkali liquor, 40-48 parts of sulfur dioxide, 65-85 parts of phenol wastewater, 5-9 parts of hydrogen peroxide, 25-45 parts of formaldehyde and 10-20 parts of liquid alkali.
Preferably, the feed is prepared from the following raw materials in parts by weight: 85-90 parts of waste alkali liquor, 46-50 parts of sulfur dioxide, 70-80 parts of phenol wastewater, 5-6 parts of hydrogen peroxide, 35-45 parts of formaldehyde and 16-20 parts of liquid alkali.
Preferably, the feed is prepared from the following raw materials in parts by weight: 90 parts of waste alkali liquor, 48 parts of sulfur dioxide, 75 parts of phenol wastewater, 5.5 parts of hydrogen peroxide, 40 parts of formaldehyde and 18 parts of liquid alkali.
Preferably, the preparation method for preparing the coal water slurry additive by using the gas-liquid two-phase sulfonated alkali pulping waste alkali comprises the following steps:
(1) adding the waste alkali liquor into a reaction kettle, heating to 50-60 ℃, and slowly introducing sulfur dioxide while stirring until the introduction is finished;
(2) adding the phenol wastewater and hydrogen peroxide into a reaction kettle, heating to 70-80 ℃, keeping the temperature for the first time, continuously dropwise adding formaldehyde into the reaction kettle, keeping the temperature for the second time after dropwise adding is finished, and adjusting the pH to 10 by using liquid alkali to obtain the product.
Preferably, the introduction time of the sulfur dioxide in the step (1) is 20-30 min.
Preferably, the dropping time of the formaldehyde in the step (2) is 20-30 min.
Preferably, the primary heat preservation time in the step (2) is 1-2 h.
Preferably, the secondary heat preservation time in the step (2) is 2 to 3 hours
(III) advantageous effects
The invention provides a method for preparing a coal water slurry additive by using gas-liquid two-phase sulfonated alkali pulping waste alkali liquor, which has the following beneficial effects:
the waste alkali liquor generated by cooking and pulping in the alkaline pulping process of the coal water slurry additive prepared by the invention not only contains lignin which is difficult to degrade, but also contains aromatic compounds such as anthraquinone and the like, and the waste alkali liquor and active groups in sulfur dioxide and phenol waste water are subjected to nucleophilic reaction, sulfonation and the like for many times, so that the product performance is improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a coal water slurry additive prepared from gas-liquid two-phase sulfonated soda pulping waste alkali liquor is prepared from the following raw materials in parts by weight: 85 parts of waste alkali liquor, 40 parts of sulfur dioxide, 66 parts of phenol wastewater, 6.5 parts of hydrogen peroxide, 45 parts of formaldehyde and 10 parts of liquid alkali.
The preparation method for preparing the coal water slurry additive by using the gas-liquid two-phase sulfonated soda pulping waste alkali liquor comprises the following steps:
(1) adding the waste alkali liquor into a reaction kettle, heating to 55 ℃, and slowly introducing sulfur dioxide while stirring for 25min until the introduction is finished;
(2) adding the phenol wastewater and hydrogen peroxide into a reaction kettle, heating to 75 ℃, preserving heat for 1.5h, continuously dropwise adding formaldehyde into the reaction kettle for 25min, preserving heat for 2.5h after dropwise adding is finished, and adjusting the pH value to 10 by using liquid alkali to obtain the product.
Example 2:
a coal water slurry additive prepared from gas-liquid two-phase sulfonated soda pulping waste alkali liquor is prepared from the following raw materials in parts by weight: 80 parts of waste alkali liquor, 45 parts of sulfur dioxide, 85 parts of phenol wastewater, 8.0 parts of hydrogen peroxide, 26 parts of formaldehyde and 12 parts of liquid alkali.
The preparation method for preparing the coal water slurry additive by using the gas-liquid two-phase sulfonated soda pulping waste alkali liquor comprises the following steps:
(1) adding the waste alkali liquor into a reaction kettle, heating to 50 ℃, slowly introducing sulfur dioxide while stirring, wherein the introduction time is 20min until the introduction is finished;
(2) adding the phenol wastewater and hydrogen peroxide into a reaction kettle, heating to 70 ℃, preserving heat for 1h, continuously dropwise adding formaldehyde into the reaction kettle for 20min, preserving heat for 2h after dropwise adding is finished, and adjusting the pH value to 10 by using liquid alkali to obtain the product.
Example 3:
a coal water slurry additive prepared from gas-liquid two-phase sulfonated soda pulping waste alkali liquor is prepared from the following raw materials in parts by weight: 85 parts of waste alkali liquor, 35 parts of sulfur dioxide, 80 parts of phenol wastewater, 7.5 parts of hydrogen peroxide, 34 parts of formaldehyde and 15 parts of liquid alkali.
The preparation method for preparing the coal water slurry additive by using the gas-liquid two-phase sulfonated soda pulping waste alkali liquor comprises the following steps:
(1) adding the waste alkali liquor into a reaction kettle, heating to 60 ℃, slowly introducing sulfur dioxide while stirring, wherein the introduction time is 30min until the introduction is finished;
(2) adding the phenol wastewater and hydrogen peroxide into a reaction kettle, heating to 80 ℃, preserving heat for 2 hours, continuously dropwise adding formaldehyde into the reaction kettle for 30min, preserving heat for 3 hours after dropwise adding is finished, and adjusting the pH value to 10 by using liquid alkali to obtain the product.
Example 4:
a coal water slurry additive prepared from gas-liquid two-phase sulfonated soda pulping waste alkali liquor is prepared from the following raw materials in parts by weight: 90 parts of waste alkali liquor, 48 parts of sulfur dioxide, 75 parts of phenol wastewater, 5.5 parts of hydrogen peroxide, 40 parts of formaldehyde and 18 parts of liquid alkali.
The preparation method for preparing the coal water slurry additive by using the gas-liquid two-phase sulfonated soda pulping waste alkali liquor comprises the following steps:
(1) adding waste alkali liquor into a reaction kettle, heating to 55 ℃, slowly introducing sulfur dioxide while stirring, wherein the introduction time is 28min until the introduction is finished;
(2) adding the phenol wastewater and hydrogen peroxide into a reaction kettle, heating to 75 ℃, preserving heat for 1.3h, continuously dropwise adding formaldehyde into the reaction kettle for 26min, preserving heat for 2.8h after dropwise adding is finished, and adjusting the pH value to 10 by using liquid alkali to obtain the product.
Example 5:
a coal water slurry additive prepared from gas-liquid two-phase sulfonated soda pulping waste alkali liquor is prepared from the following raw materials in parts by weight: 90 parts of waste alkali liquor, 40 parts of sulfur dioxide, 70 parts of phenol wastewater, 8.5 parts of hydrogen peroxide, 34 parts of formaldehyde and 14 parts of liquid alkali.
The preparation method for preparing the coal water slurry additive by using the gas-liquid two-phase sulfonated soda pulping waste alkali liquor comprises the following steps:
(1) adding waste alkali liquor into a reaction kettle, heating to 55 ℃, slowly introducing sulfur dioxide while stirring, wherein the introduction time is 28min until the introduction is finished;
(2) adding the phenol wastewater and hydrogen peroxide into a reaction kettle, heating to 75 ℃, preserving heat for 1.3h, continuously dropwise adding formaldehyde into the reaction kettle for 26min, preserving heat for 2.8h after dropwise adding is finished, and adjusting the pH value to 10 by using liquid alkali to obtain the product.
Example 6:
a coal water slurry additive prepared from gas-liquid two-phase sulfonated soda pulping waste alkali liquor is prepared from the following raw materials in parts by weight: 86 parts of waste alkali liquor, 42 parts of sulfur dioxide, 75 parts of phenol wastewater, 7 parts of hydrogen peroxide, 40 parts of formaldehyde and 12 parts of liquid alkali.
The preparation method for preparing the coal water slurry additive by using the gas-liquid two-phase sulfonated soda pulping waste alkali liquor comprises the following steps:
(1) adding the waste alkali liquor into a reaction kettle, heating to 53 ℃, and slowly introducing sulfur dioxide while stirring for 25min until the introduction is finished;
(2) adding the phenol wastewater and hydrogen peroxide into a reaction kettle, heating to 73 ℃, preserving heat for 1.5h, continuously dropwise adding formaldehyde into the reaction kettle for 22min, preserving heat for 2.3h after dropwise adding is finished, and adjusting the pH value to 10 by using liquid alkali to obtain the product.
Example 7:
a coal water slurry additive prepared from gas-liquid two-phase sulfonated soda pulping waste alkali liquor is prepared from the following raw materials in parts by weight: 88 parts of waste alkali liquid, 43 parts of sulfur dioxide, 80 parts of phenol wastewater, 8.2 parts of hydrogen peroxide, 28 parts of formaldehyde and 13 parts of liquid alkali.
The preparation method for preparing the coal water slurry additive by using the gas-liquid two-phase sulfonated soda pulping waste alkali liquor comprises the following steps:
(1) adding the waste alkali liquor into a reaction kettle, heating to 58 ℃, and slowly introducing sulfur dioxide while stirring for 22min until the introduction is finished;
(2) adding the phenol wastewater and hydrogen peroxide into a reaction kettle, heating to 73 ℃, preserving heat for 1.8h, continuously dropwise adding formaldehyde into the reaction kettle for 24min, preserving heat for 2.5h after dropwise adding is finished, and adjusting the pH value to 10 by using liquid alkali to obtain the product.
Example 8:
a coal water slurry additive prepared from gas-liquid two-phase sulfonated soda pulping waste alkali liquor is prepared from the following raw materials in parts by weight: 88 parts of waste alkali liquid, 44 parts of sulfur dioxide, 82 parts of phenol wastewater, 8.3 parts of hydrogen peroxide, 28 parts of formaldehyde and 13 parts of liquid alkali.
The preparation method for preparing the coal water slurry additive by using the gas-liquid two-phase sulfonated soda pulping waste alkali liquor comprises the following steps:
(1) adding the waste alkali liquor into a reaction kettle, heating to 56 ℃, and slowly introducing sulfur dioxide while stirring for 30min until the introduction is finished;
(2) adding the phenol wastewater and hydrogen peroxide into a reaction kettle, heating to 79 ℃, preserving heat for 1.6h, continuously dropwise adding formaldehyde into the reaction kettle for 25min, preserving heat for 2.5h after dropwise adding is finished, and adjusting the pH value to 10 by using liquid alkali to obtain the product.
The method selects the Xian Changqing coal as a research object, and after screening and grading, the target slurry concentration is 66%, and the addition amount is 0.25% of the dry basis of the coal. The following is the comparison of the performance of the product of the invention with the performances of other coal water slurry additives:
as can be seen from the table above, the coal water slurry prepared by the product of the invention has high concentration, low viscosity, good fluidity and stability, has industrial application value, and has performance obviously superior to other coal water slurry additives; under the same pulping conditions, the product of example 4 produced the lowest viscosity slurry and the highest spread.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the inclusion of an element by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that various changes and modifications may be made, and equivalents may be substituted for elements thereof without departing from the scope of the present invention; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The gas-liquid two-phase sulfonated soda pulping waste alkali liquor prepared coal water slurry additive is characterized by being prepared from the following raw materials in parts by weight: 80-90 parts of waste alkali liquor, 40-48 parts of sulfur dioxide, 65-85 parts of phenol wastewater, 5-9 parts of hydrogen peroxide, 25-45 parts of formaldehyde and 10-20 parts of liquid alkali;
the preparation method for preparing the coal water slurry additive by using the gas-liquid two-phase sulfonated soda pulping waste alkali liquor comprises the following steps:
(1) adding the waste alkali liquor into a reaction kettle, heating to 50-60 ℃, and slowly introducing sulfur dioxide while stirring until the introduction is finished;
(2) adding the phenol wastewater and hydrogen peroxide into a reaction kettle, heating to 70-80 ℃, keeping the temperature for the first time, continuously dropwise adding formaldehyde into the reaction kettle, keeping the temperature for the second time after dropwise adding is finished, and adjusting the pH to 10 by using liquid alkali to obtain the product.
2. The gas-liquid two-phase sulfonated alkali pulping waste alkali liquor prepared coal water slurry additive according to claim 1, which is prepared from the following raw materials in parts by weight: 85-90 parts of waste alkali liquor, 46-48 parts of sulfur dioxide, 70-80 parts of phenol wastewater, 5-6 parts of hydrogen peroxide, 35-45 parts of formaldehyde and 16-20 parts of liquid alkali.
3. The gas-liquid two-phase sulfonated alkali pulping waste alkali liquor prepared coal water slurry additive according to claim 1, which is prepared from the following raw materials in parts by weight: 90 parts of waste alkali liquor, 48 parts of sulfur dioxide, 75 parts of phenol wastewater, 5.5 parts of hydrogen peroxide, 40 parts of formaldehyde and 18 parts of liquid alkali.
4. The gas-liquid two-phase sulfonated alkali pulping waste alkali liquor prepared coal water slurry additive according to claim 1, wherein the introduction time of the sulfur dioxide in the step (1) is 20-30 min.
5. The gas-liquid two-phase sulfonated alkali pulping waste alkali liquor prepared coal water slurry additive according to claim 1, wherein the formaldehyde is added in step (2) for 20-30 min.
6. The gas-liquid two-phase sulfonated alkali process pulping waste alkali liquor prepared coal water slurry additive according to claim 1, wherein the primary heat preservation time in the step (2) is 1-2 h.
7. The gas-liquid two-phase sulfonated alkali pulping waste alkali liquor prepared coal water slurry additive according to claim 1, wherein the secondary heat preservation time in the step (2) is 2-3 h.
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| CN201810482475.7A CN108456572B (en) | 2018-05-18 | 2018-05-18 | Gas-liquid two-phase sulfonated alkali method for preparing coal water slurry additive from waste alkali liquor |
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| JPS62101692A (en) * | 1985-10-30 | 1987-05-12 | Kao Corp | Dispersion stabilizer for coal-water slurry |
| CN101224958B (en) * | 2008-02-01 | 2011-01-26 | 福州大学 | Sulfonated alkali lignin modified sulfamate high-effective water reducer and preparation method thereof |
| CN105601943A (en) * | 2015-11-13 | 2016-05-25 | 浙江捷发科技有限公司 | Method used for preparing sulfonated lignin from sulfate papermaking waste water |
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