CN102773079B - System for coproducing sulfonated coal and humic acid by using sulfuric acid - Google Patents
System for coproducing sulfonated coal and humic acid by using sulfuric acid Download PDFInfo
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Abstract
The invention relates to a method and system for coproducing sulfonated coal and humic acid by using sulfuric acid. The method comprises the following steps: mixing concentrated sulfuric acid and coal at the mass ratio of 2:1 to 6:1, and subjecting the mixture to reaction for 4-20 hours at 100-200 DEG C to obtain the sulfonated coal; adjusting the formed diluted acid solution into the 10-20% sulfuric acid solution, mixing the 10-20% sulfuric acid solution with the coal at the mass ratio of 1:1 to 2:1, and subjecting the mixture to reaction for 30-120 minutes at 40-80 DEG C to obtain the crude mixture of the humic acid, wherein the coal contains 30% of humic acid or more. The coal particles are sulfonated by the concentrated sulfuric acid to prepare the sulfonated coal, and then the washed waste acid solution is used for oxidizing the feed coal with the humic acid to increase the content of the humic acid in the feed coal. The problem on the discharge of the acid-containing wastewater is solved, and the economic benefit of enterprises is improved. In addition, according to the method, the waste heat of the industrial waste flue gas is fully utilized, and the energy-saving environmental-protection circular economy route is realized.
Description
Technical field
The present invention relates to a kind of method of coproduction sulfonated coal and humic acid, particularly relate to the method and system of a kind of sulfuric acid and coal coproduction sulfonated coal and humic acid.
Background technology
Sulfonated coal is that the concentrated sulfuric acid and the coal such as bituminous coal, brown coal generation sulfonating reaction are made.Sulfonated coal has that surface area is large, surface polarity is strong, adsorption capacity is good and have the features such as good ion exchange activity, is widely used in Footwall drift in sewage cleaning agent, water softener, hydrometallurgy, prepares active carbon and organic reaction catalyst etc.Sulfonated coal has ion-exchange and adsorption two effect concurrently in water, and it has good absorbability to nitro compound, amino-compound, phenols, organochlorine, organophosphor etc.; In the industries such as medicine, dyestuff, agricultural chemicals for the treatment of containing phenol, fluorine-containing, containing heavy metal ion industrial wastewater and reclaim organic matter.With sulfonated coal process waste water, be not only stripped of deeply dense color, make water become clear, also make the chemical oxygen consumption (COC) of waste water, biochemical oxygen demand (BOD) reduce simultaneously.When producing sulfonated coal with the concentrated sulfuric acid, its product, except sulfonated coal, also has pickle, if pickle directly discharged, can cause very large pollution to environment; If dilution heat of sulfuric acid is made the concentrated sulfuric acid again by absorption tower, production cost then can be very high.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method of producing sulfuric acid and jointly sulfonated coal and humic acid, humic acid can be produced with producing the residue dilution heat of sulfuric acid after sulfonated coal, sulfuric acid is fully used, while solving acid-bearing wastewater discharge, adds economic benefit.
The present invention's method of producing sulfuric acid and jointly sulfonated coal and humic acid, comprises the following steps:
A, granularity is provided to be less than the coal particles of 30mm;
B, concentration is more than or equal to 50% sulfuric acid and above-mentioned pulverizing after particle join in the first reaction unit according to the ratio that mass ratio is 2:1 ~ 6:1, stir, under the temperature conditions of 100 ~ 200 DEG C, react 4 ~ 20 hours;
C, with equipment for separating liquid from solid by reacted separating substances, the solid obtained through washing post-drying, obtain sulfonated coal;
D, the pickle mixing will formed after the liquid obtained after Separation of Solid and Liquid and washing, then add water or sulfuric acid, be adjusted to the sulfuric acid solution that concentration is 10% ~ 20%, the humic acid material coal particle sulfuric acid solution obtained and humic acid content being more than or equal to 30% joins in the second reaction unit according to the ratio that mass ratio is 1:1 ~ 2:1, stir, under the temperature conditions of 40 ~ 80 DEG C, react 30 ~ 120 minutes, obtain humic acid crude mixture.
The present invention's method of producing sulfuric acid and jointly sulfonated coal and humic acid, the agitating mode of the reactant in wherein said step b and steps d is that mechanical system stirs.
Preferably, the agitating mode of the reactant in described step b is that bubble type stirs, the waste gas passing into 100 ~ 300 DEG C in the bottom of reaction unit or the parsing hot-air of 100 ~ 300 DEG C formed after resolving activated coke.
Preferably, in described step b, the temperature of the waste gas passed in the bottom of reaction unit or parsing hot-air is 180 ~ 240 DEG C.
The present invention's method of producing sulfuric acid and jointly sulfonated coal and humic acid, the agitating mode of the reactant in wherein said steps d is that bubble type stirs, and passes into the useless flue gas of 50 ~ 120 DEG C in the bottom of reaction unit.
Preferably, in described steps d, the useless flue gas passed in the bottom of reaction unit is the useless flue gas after drying brown coal, and its temperature is 70 ~ 100 DEG C.It is one of energy-saving and cost-reducing main contents of China that fume afterheat utilizes, and acid pickle remaining after coproduction sulfonated coal and waste heat can be recycled by the present invention simultaneously, realizes environmental protection, energy-conservation, economic benefit has realistic meaning.
The present invention's method of producing sulfuric acid and jointly sulfonated coal and humic acid, in wherein said step b, the mass ratio of sulfuric acid and particle is 3:1 ~ 5:1, under the temperature conditions of 150 ~ 175 DEG C, reacts 8 ~ 13 hours.
Preferably, the concentration of the sulfuric acid reacted in steps d is 16% ~ 19%, and the mass ratio of sulfuric acid solution and coal particles is 1:1 ~ 1.4:1, under the temperature conditions of 50 ~ 70 DEG C, reacts 40 ~ 60 minutes.
The present invention's method of producing sulfuric acid and jointly sulfonated coal and humic acid, by input sulfuric acid and coal, can realize coproduction sulfonated coal and humic acid, from high to low, ladder utilizes the concentration of sulfuric acid, takes full advantage of acid ion, while the discharge of solution acid-bearing wastewater, add economic benefit.
Another problem that the present invention will solve is to provide the system of a kind of producing sulfuric acid and jointly sulfonated coal and humic acid.
The system of a kind of producing sulfuric acid and jointly sulfonated coal of the present invention and humic acid, comprise crushing and screening device, first reaction unit, first solid-liquid separator, rinsing machine, first dryer, screening dust arrester, liquid dispensing device, second reaction unit, second solid-liquid separator and the second dryer, the discharging opening of crushing and screening device is communicated with the charging aperture of the first reaction unit, the discharging opening of the first reaction unit is communicated with the charging aperture of the first solid-liquid separator, the solid-phase outlet of the first solid-liquid separator is communicated with the charging aperture of rinsing machine, the liquid outlet of rinsing machine is communicated with liquid dispensing device, the solid-phase outlet of rinsing machine is communicated with the charging aperture of the first dryer, the discharging opening of the first dryer is communicated with the charging aperture of screening dust arrester, the liquid-phase outlet of the first solid-liquid separator is communicated with the charging aperture stating liquid dispensing device, the discharging opening of liquid dispensing device is communicated with the charging aperture of the second reaction unit, the discharging opening of the second reaction unit is communicated with the charging aperture of the second solid-liquid separator, the solid-phase outlet of the second solid-liquid separator is communicated with the charging aperture of the second dryer.
The present invention's system of producing sulfuric acid and jointly sulfonated coal and humic acid, the agitating mode of wherein said first reaction unit is that bubble type stirs, and the agitating mode of the second reaction unit is also bubble type stirring.
The present invention's system of producing sulfuric acid and jointly sulfonated coal and humic acid, can by input sulfuric acid and coal, coproduction sulfonated coal and humic acid, while the discharge of solution acid-bearing wastewater, add economic benefit.
Below in conjunction with accompanying drawing, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is the structural representation of the system of the present invention's producing sulfuric acid and jointly sulfonated coal and humic acid.
Detailed description of the invention
As shown in Figure 1, the system of the present invention's producing sulfuric acid and jointly sulfonated coal and humic acid comprises crushing and screening device 1, first reaction unit 2, first solid-liquid separator 3, rinsing machine 4, first dryer 5, screening dust arrester 6, liquid dispensing device 7, second reaction unit 8, second solid-liquid separator 9 and the second dryer 10.The discharging opening of crushing and screening device 1 is communicated with the charging aperture of the first reaction unit 2, the discharging opening of the first reaction unit 2 is communicated with the charging aperture of the first solid-liquid separator 3, the solid-phase outlet of the first solid-liquid separator 3 is communicated with the charging aperture of rinsing machine 4, the liquid outlet of rinsing machine 4 is communicated with liquid dispensing device 7, the solid-phase outlet of rinsing machine 4 is communicated with the charging aperture of the first dryer 5, the discharging opening of the first dryer 5 is communicated with the charging aperture of screening dust arrester 6, the liquid-phase outlet of the first solid-liquid separator 3 is communicated with the charging aperture of liquid dispensing device 7, the discharging opening of liquid dispensing device 7 is communicated with the charging aperture of the second reaction unit 8, the discharging opening of the second reaction unit 8 is communicated with the charging aperture of the second solid-liquid separator 9, the solid-phase outlet of the second solid-liquid separator 9 is communicated with the charging aperture of the second dryer 10.
As shown in Figure 1, the present invention with the system of producing sulfuric acid and jointly sulfonated coal and humic acid in use, first add brown coal by crushing and screening device 1, certainly, also can add the coals such as bituminous coal, selected coal should select intensity high, the coal that carbon content is relatively higher.Brown coal are after crushing and screening device 1 crushing and screening, obtain the brown coal particle that granularity is less than 30mm, then brown coal particle is put into the first reaction unit 2, in the first reaction unit 2, add the sulfuric acid that concentration is more than or equal to 50% simultaneously, the mass ratio of sulfuric acid and brown coal particle is 2:1 ~ 6:1, stir, keep the temperature conditions of 100 ~ 200 DEG C, react 4 ~ 20 hours.In the present embodiment, the concentration of the sulfuric acid added in the first reaction unit 2 is 90% ~ 98%, and the mass ratio of sulfuric acid and brown coal particle is 3:1 ~ 5:1, under the temperature conditions of 150 ~ 175 DEG C, reacts 8 ~ 13 hours.First reaction unit 2 can adopt stirred autoclave.First reaction unit 2 also can adopt bubbling bed reactor, the industrial waste gas passing into 100 ~ 300 DEG C bottom it or the parsing hot-air of 100 ~ 300 DEG C formed after resolving activated coke, both can make full use of waste heat contained in waste gas and provide heat to the reaction of the sulfuric acid in bubbling bed reactor and brown coal particle, again by bubbling, sulfuric acid and brown coal particle are fully stirred, the temperature preferably 180 ~ 240 DEG C of the waste gas wherein passed into bottom the first reaction unit 2 or parsing hot-air.The material that first reaction unit 2 obtains after reacting sends into the first solid-liquid separator 3, the solid-phase outlet of the first solid-liquid separator 3 obtains the sulfonated coal containing a small amount of sulfuric acid, passed in rinsing machine 4, by washing, sulfuric acid is wherein washed away, the first dryer 5 sent into by the sulfonated coal obtained, after sulfonated coal feeding screening dust arrester 6 after oven dry sieves dedusting, obtain finished product sulfonated coal particle.The liquid-phase outlet of the first solid-liquid separator 3 is all communicated with liquid dispensing device 7 with the liquid outlet of rinsing machine 4, and the sulfuric acid solution in liquid dispensing device 7, by adding water or the concentrated sulfuric acid, makes the concentration adjustment of the sulfuric acid solution in liquid dispensing device 7 be 10% ~ 20%, and preferably 16% ~ 19%.The sulfuric acid solution regulated is sent into the second reaction unit 8 by liquid dispensing device 7, in the second reaction unit 8, add the brown coal particle that humic acid content is more than or equal to 30% simultaneously, certainly, humic acid material coal also can select other coal that wind degree of oxidation is high, humic acid content is high, the mass ratio of sulfuric acid solution and brown coal particle is 1:1 ~ 2:1, the two is stirred, under the temperature conditions of 40 ~ 80 DEG C, reacts 30 ~ 120 minutes.In the present embodiment, in the second reaction unit 8, the mass ratio of sulfuric acid solution and brown coal particle is preferred 1:1 ~ 1.4:1, under the temperature conditions of 50 ~ 70 DEG C, reacts 40 ~ 60 minutes.Second reaction unit 8 can adopt stirred autoclave.Second reaction unit 8 also can adopt bubbling bed reactor, the useless flue gas of 50 ~ 120 DEG C is passed into bottom it, the useless flue gas of 70 ~ 100 DEG C after preferred drying brown coal, adopt the mode passing into useless flue gas, waste heat contained in waste gas can be made full use of and provide heat to the reaction of the sulfuric acid in bubbling bed reactor and brown coal particle, again by bubbling, sulfuric acid and brown coal particle are fully stirred.The material obtained after reaction in second reaction unit 8 sends into the second solid-liquid separator 9, the liquid-phase outlet of the second solid-liquid separator 9 obtains liquid humic acid crude product 11, the solid that the solid-phase outlet of the second solid-liquid separator 9 obtains is sent into after the second dryer 10 dries, and obtains solid-state humic acid crude product.
Embodiment 1:
By the method for producing sulfuric acid and jointly sulfonated coal and humic acid be:
1, by concentration be 50% sulfuric acid and the granularity brown coal particle that is less than 30mm join in the first reaction unit according to the ratio that mass ratio is 2:1, stir, under the temperature conditions of 100 DEG C, react 4 hours;
2, with equipment for separating liquid from solid by reacted separating substances, the solid obtained through washing post-drying, obtain sulfonated coal;
3, the pickle mixing will formed after the liquid obtained after Separation of Solid and Liquid and washing, then add water or sulfuric acid, be adjusted to the sulfuric acid solution that concentration is 10%, by the sulfuric acid solution obtained and humic acid content be 30% brown coal particle join in the second reaction unit according to the ratio that mass ratio is 1:1, stir, under the temperature conditions of 40 DEG C, react 30 minutes, obtain humic acid crude mixture.
Embodiment 2:
By the method for producing sulfuric acid and jointly sulfonated coal and humic acid be:
1, by concentration be 95% sulfuric acid and the granularity brown coal particle that is less than 30mm join in the first reaction unit according to the ratio that mass ratio is 6:1, stir, under the temperature conditions of 200 DEG C, react 20 hours;
2, with equipment for separating liquid from solid by reacted separating substances, the solid obtained through washing post-drying, obtain sulfonated coal;
3, the pickle mixing will formed after the liquid obtained after Separation of Solid and Liquid and washing, then add water or sulfuric acid, be adjusted to the sulfuric acid solution that concentration is 20%, by the sulfuric acid solution obtained and humic acid content be 55% brown coal particle join in the second reaction unit according to the ratio that mass ratio is 2:1, stir, under the temperature conditions of 80 DEG C, react 120 minutes, obtain humic acid crude mixture.
Embodiment 3:
By the method for producing sulfuric acid and jointly sulfonated coal and humic acid be:
1, by concentration be 95% sulfuric acid and the granularity brown coal particle that is less than 30mm join in the first reaction unit according to the ratio that mass ratio is 3:1, stir, under the temperature conditions of 170 DEG C, react 15 hours;
2, with equipment for separating liquid from solid by reacted separating substances, the solid obtained through washing post-drying, obtain sulfonated coal;
3, the pickle mixing will formed after the liquid obtained after Separation of Solid and Liquid and washing, then add water or sulfuric acid, be adjusted to the sulfuric acid solution that concentration is 15%, by the sulfuric acid solution obtained and humic acid content be 65% brown coal particle join in the second reaction unit according to the ratio that mass ratio is 1.5:1, stir, under the temperature conditions of 70 DEG C, react 80 minutes, obtain humic acid crude mixture.
Embodiment 4:
By the method for producing sulfuric acid and jointly sulfonated coal and humic acid be:
1, by concentration be 90% sulfuric acid and the granularity brown coal particle that is less than 30mm join in the first reaction unit according to the ratio that mass ratio is 3:1, stir, under the temperature conditions of 150 DEG C, react 8 hours;
2, with equipment for separating liquid from solid by reacted separating substances, the solid obtained through washing post-drying, obtain sulfonated coal;
3, the pickle mixing will formed after the liquid obtained after Separation of Solid and Liquid and washing, then add water or sulfuric acid, be adjusted to the sulfuric acid solution that concentration is 16%, by the sulfuric acid solution obtained and humic acid content be 70% brown coal particle join in the second reaction unit according to the ratio that mass ratio is 1.2:1, stir, under the temperature conditions of 50 DEG C, react 30 ~ 120 minutes, obtain humic acid crude mixture.
Embodiment 5:
By the method for producing sulfuric acid and jointly sulfonated coal and humic acid be:
1, by concentration be 80% sulfuric acid and the granularity brown coal particle that is less than 30mm join in the first reaction unit according to the ratio of mass ratio 5:1, stir, under the temperature conditions of 175 DEG C, react 13 hours;
2, with equipment for separating liquid from solid by reacted separating substances, the solid obtained through washing post-drying, obtain sulfonated coal;
3, the pickle mixing will formed after the liquid obtained after Separation of Solid and Liquid and washing, then add water or sulfuric acid, be adjusted to the sulfuric acid solution that concentration is 19%, by the sulfuric acid solution obtained and humic acid content be 65% brown coal particle join in the second reaction unit according to the ratio that mass ratio is 1.4:1, stir, under the temperature conditions of 40 DEG C, react 60 minutes, obtain humic acid crude mixture.
Embodiment 6:
By the method for producing sulfuric acid and jointly sulfonated coal and humic acid be:
1, by concentration be 98% sulfuric acid and the granularity brown coal particle that is less than 30mm join in the first reaction unit according to the ratio that mass ratio is 3.5:1, stir, under the temperature conditions of 165 DEG C, react 11 hours;
2, with equipment for separating liquid from solid by reacted separating substances, the solid obtained through washing post-drying, obtain sulfonated coal;
3, the pickle mixing will formed after the liquid obtained after Separation of Solid and Liquid and washing, then add water or sulfuric acid, be adjusted to the sulfuric acid solution that concentration is 17%, by the sulfuric acid solution obtained and humic acid content be 60% brown coal particle join in the second reaction unit according to the ratio that mass ratio is 1.3:1, stir, under the temperature conditions of 61 DEG C, react 50 minutes, obtain humic acid crude mixture.
Fertilizer containing humic acid, has improvement soil, promotes fertilizer efficiency, stimulating growth, slightly acts on greatly through degeneration-resistant, oil recovery enhancement five in agricultural production.The thing of humic acid quilt can stimulate enzymatic activity after absorbing, and promotes root system development, improves absorption function, and plays a role to the synthesis of vitamin, starch, amino acid, nucleic acid, protein etc. and metabolism, thus improves the general level of the health and the anti-adversity ability of plant.Indirectly can increase soil fertility, improve water and fertilizer condition by improving soil property or improve the effective Promoting plant growth growth of nutrient by complexing solubilising.First the present invention utilizes concentrated acid sulfonation coal particles, produce sulfonated coal, then the acid pickle after washing is used for being oxidized humic acid material coal, increase by 5 ~ 20%(mass percent in humic acid material coal) the content of humic acid, therefore, the present invention, while production sulfonated coal, utilizes acid-bearing wastewater to produce humic acid, solving acid-bearing wastewater discharge, improve the economic benefit of enterprise.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (2)
1. the system with producing sulfuric acid and jointly sulfonated coal and humic acid, it is characterized in that: comprise crushing and screening device (1), first reaction unit (2), first solid-liquid separator (3), rinsing machine (4), first dryer (5), screening dust arrester (6), liquid dispensing device (7), second reaction unit (8), second solid-liquid separator (9) and the second dryer (10), the discharging opening of described crushing and screening device (1) is communicated with the charging aperture of the first reaction unit (2), the discharging opening of the first reaction unit (2) is communicated with the charging aperture of the first solid-liquid separator (3), the solid-phase outlet of described first solid-liquid separator (3) is communicated with the charging aperture of rinsing machine (4), the liquid outlet of described rinsing machine (4) is communicated with liquid dispensing device (7), the solid-phase outlet of rinsing machine (4) is communicated with the charging aperture of the first dryer (5), the discharging opening of the first dryer (5) is communicated with the charging aperture of screening dust arrester (6), the liquid-phase outlet of described first solid-liquid separator (3) is communicated with the charging aperture of described liquid dispensing device (7), the discharging opening of described liquid dispensing device (7) is communicated with the charging aperture of the second reaction unit (8), the discharging opening of the second reaction unit (8) is communicated with the charging aperture of the second solid-liquid separator (9), the solid-phase outlet of described second solid-liquid separator (9) is communicated with the charging aperture of the second dryer (10).
2. the system of producing sulfuric acid and jointly sulfonated coal according to claim 1 and humic acid, it is characterized in that: the agitating mode of described first reaction unit (2) is that bubble type stirs, the agitating mode of described second reaction unit (8) is that bubble type stirs.
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| CN104353429A (en) * | 2014-11-05 | 2015-02-18 | 华玉叶 | Process for preparing sulfide coal |
| CN111233550B (en) * | 2020-01-19 | 2021-11-23 | 浙江丰瑜生态科技股份有限公司 | Humic acid water-soluble fertilizer suitable for hickory planting and preparation method and application thereof |
| CN111233573B (en) * | 2020-01-19 | 2021-11-30 | 浙江丰瑜生态科技股份有限公司 | Newly-reclaimed rice field soil improvement humic acid compound fertilizer and preparation method thereof |
| CN112661976B (en) * | 2020-12-21 | 2022-07-12 | 安徽工业大学 | Preparation method of low-rank coal-based high-efficiency water reducing agent |
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| CN202921325U (en) * | 2012-08-09 | 2013-05-08 | 北京康瑞新源净化技术有限公司 | System for coproduction of sulfonated coal and humic acid by using sulfuric acid |
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| 以劣质褐煤为原料制备磺化煤的研究;罗道成等;《煤化工》;20090430(第02期);22-24 * |
| 稀硫酸处理低钙风化煤提高腐植酸产率的初步研究;廖锦材等;《化肥工业》;19800630(第03期);29-32 * |
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