CN103923715A - Method for preparing aqueous charcoal pulp by using semi coke powder as raw material - Google Patents
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Abstract
The invention provides a method for preparing aqueous charcoal pulp by using semi coke powder as a raw material. The method comprises the following steps: firstly, putting the semi coke powder in a drying tank for drying treatment; grinding to obtain semi coke powder with different granularities in a mill by adopting a dry-method ore grinding process; mixing materials according to a specified grading scheme; dissolving a certain amount of additive into water, mixing and stirring with the semi coke powder until a uniform paste, namely the aqueous charcoal pulp with high concentration and good stability, is obtained. The method is simple in process and convenient to operate, and can be used for producing by directly utilizing an existing aqueous charcoal pulp production device; the prepared aqueous charcoal pulp product can completely achieve the application standards of combustion, gasification and other industries, and has an important meaning in high-efficiency and clean utilization of existing semi coke powder resources.
Description
Technical field
The invention belongs to clean coal technical field, be specifically related to a kind ofly take blue charcoal end and prepare the method for water charcoal slurry as raw material.
Background technology
The lower-grade metamorphic bituminous resource of China (long-flame coal, non-caking coal, weakly caking coal) accounts for the more than 60% of coal resources, Ordos Basin and North Shaanxi (Yulin, Yan'an) are the unique energy heavy chemical bases of country of (1998) No. 1404 literary composition approvals of National Development and Reform Committee's plan word, low-disintegration coal resource is richly stored with, have the advantages that low ash, low-sulfur, low-phosphorous, low ash smelting point and golf calorific value, high inertinite divide content, high oxidation calcium contents, account for 34.9% of the whole nation.This resource is mainly used as power and obtains blue charcoal, burnt oil and gas product with coal or by middle low-temperature pyrolysis (pyrolysis) at present.Research shows, the tar content of this coal is generally 7%～12%, therefore by middle low-temperature pyrolysis technique obtain blue charcoal, burnt oil and gas be at present a kind of the most simply, the most applicable path for transformation, this has special meaning to optimizing energy structure of China's oil starvation weak breath.
Blue charcoal is a kind ofly to have the good characteristics such as high chemically reactive, high specific resistance, high fixed carbon, low ash, low-sulfur, low-phosphorous, low alchlor, but intensity poor carbonaceous product relative to crush resistance is widely used in industries such as iron alloy, calcium carbide, chemical fertilizer.Jinning County, China Shan has built Meng Gan contiguous areas large quantities of Lan Tan factory, and approximately 6,000 ten thousand tons of total capacities, with 9,600 ten thousand tons, coal.Wherein, approximately 4,500 ten thousand tons, area, Yulin, with 7,200 ten thousand tons, coal, has become the mainstay industry of Regional Economic Development, about 6,750,000 tons of the blue charcoal end that process produces.In addition, in actual coal production, lump coal yield is only 30% to 40%, only with regard to area, Yulin, between in January, 2012-October, fine coal output has just reached 1.8 hundred million tons of left and right, if pulverized coal pyrolysis technology wide popularization and application, by processing 50%, calculate, the blue powdered carbon that has every year 6000 ten thousand tons of left and right produces.Therefore, adopting blue charcoal ultimogeniture to produce water charcoal slurry, to replace coal water slurry be a kind of new way of the blue charcoal of gained end product clean utilization after China's low-disintegration coal resource classification, upgrading for gas making and boiler.
Coal water slurry be a kind of physical method that adopts by the New-type fuel of coal liquefied, according to coal 60～70%, the ratio of water 30～40%, adds a small amount of additive to be prepared from.It had both kept the original physical features of coal, had again mobility and stability that image-stone oil is the same, can pumping, and easily accumulating and adjustment again, can spray burning, belong to again low pollution clean fuel, and efficiency of combustion is high, is called as liquid coal product.On this basis, the present invention proposes and take blue charcoal end and prepare the method for water charcoal slurry as raw material, try hard to expand the field that utilizes at blue charcoal end, solve the low problem of blue charcoal end utilising efficiency.
Blue charcoal is the product of low-temperature pyrolysis in low-disintegration coal, there is basic difference with the Nomenclature Composition and Structure of Complexes of coal, the constitutional features of his uniqueness causes its surface to have strong hydrophobicity, and easy pulping unlike coal dust need to change by special dispersion agent its wetting ability.Compare with coal dust, the interior water-content of blue charcoal is lower, but can adsorb a certain amount of water molecules containing oxygen polar functional group in structure, thereby water-content in increasing makes the concentration of slurry be difficult to improve.The grain size distribution of blue charcoal is also guardian technique, and higher deposition efficiency is conducive to increase the mobility of water charcoal slurry, only has grain size distribution reasonable, and its slurry just can reach suitable viscosity and satisfactory stability.Ramsbottom carbon powder particle is thinner simultaneously, and its surface-area is larger, also easier Spontaneous Condensation.Therefore, in the preparation process of water charcoal slurry, how being prepared as a kind of uniform slurry, also will having low viscosity, high concentration and satisfactory stability and mobility simultaneously, is a crucial difficult problem that needs emphasis to solve and capture.
Summary of the invention
The object of the present invention is to provide a kind of method of producing water charcoal slurry with blue charcoal end, the method technique is simple, can utilize the coal water slurry production equipment of current maturation to produce, the water charcoal slurry of preparation has the good performance index such as high density, high stability, can meet the application requiring of the industry such as burning, gasification completely.
For achieving the above object, the present invention takes following technical scheme:
Take blue charcoal end prepares the method for water charcoal slurry as raw material, take the lower-grade metamorphic bituminous blue charcoal of middle low temperature pyrogenation product end to prepare water charcoal slurry as raw material, and lower-grade metamorphic bituminous is weakly caking coal, non-caking coal or long-flame coal, comprises the steps:
Step 1 is carried out drying treatment by blue charcoal end under 100 ℃ of conditions, with being placed in grinding machine, carries out ore grinding, obtains the powder of size fractionated after screening is processed, and according to set grading distribution scheme, carries out batch mixing and fully mixes;
Step 2, gets quantitative additive and is dissolved in a certain amount of water, obtains mixing solutions;
Step 3, by the mixed Ramsbottom carbon powder of step 1 gained and step 2 gained additive aqueous solution, stirs and obtains water charcoal slurry.
Preferably, adopt dry method griding technology to obtain the powder of size fractionated in described step 1, grading distribution scheme is (massfraction) :-200 orders account for 60-90%, and 100-200 order accounts for 5-20%, and 60-100 order accounts for 5-20%.
Preferably, the polymkeric substance that in described step 2, additive is a kind of Soxylat A 25-7-acrylate and the mixture of Xylo-Mucine.
Preferably, described additive amount (massfraction) is the 0.1-2.0% of blue charcoal end siccative amount, and wherein, the polymkeric substance of Soxylat A 25-7-acrylate accounts for 0.1-0.5%, and Xylo-Mucine accounts for 0-1.5%.
The preparation method of the polymkeric substance of described Soxylat A 25-7-acrylate is: a certain amount of Soxylat A 25-7 is water-soluble at 60 ℃, stir 30min, drip acrylate and initiator ammonium persulfate, the mol ratio of Soxylat A 25-7 and acrylate is 1:1.5, ammonium persulphate consumption is the 10%(massfraction of acrylate consumption), the consumption of water is to add at 60%, 60～80 ℃ of material gross weight to react 4h, obtains Soxylat A 25-7-acrylic ester polymer.
Preferably, in described step 2, the consumption of water calculates according to water charcoal slurry concentration and additive amount, and calculation formula is: water coal slurry concentration (massfraction %)=dry coal quality (g)/[dry coal quality (g)+water (g)+additive (g)] * 100%.
Preferably, in step 3, blue charcoal end is first with 1500～2000rmin with the stirring of additive aqueous solution
-1speed rapid stirring to mixture become slurry shape, then with 400～500rmin
-1speed low rate mixing.
Compared with prior art, advantage of the present invention is:
(1) usining blue charcoal end meets burning and the gasification high density of sector application, the water charcoal of high stability slurry product as body material processability.
(2) solved a comprehensive utilization difficult problem for low-disintegration coal (weakly caking coal, non-caking coal, long-flame coal) pyrolysis solid phase prod-Lan charcoal, expanded the Application Areas at blue charcoal end, can utilize the water-coal-slurry device of prior art maturation and technique directly to produce simultaneously.
Embodiment
Below in conjunction with embodiment, the present invention is described in further details.
Raw materials used is the blue charcoal end in area, Yulin, and its ultimate analysis and technical analysis result are as shown in table 1.
Table 1 technical analysis and ultimate analysis
Embodiment 1: selecting additive is Soxylat A 25-7-acrylic ester polymer and Xylo-Mucine, and its massfraction is 1.0% of blue charcoal end siccative, wherein, and Soxylat A 25-7-acrylic ester polymer 0.5%, Xylo-Mucine 0.5%.The preparation method of the polymkeric substance of Soxylat A 25-7-acrylate is: a certain amount of Soxylat A 25-7 is water-soluble at 60 ℃, stir 30min, drip acrylate and initiator ammonium persulfate, the mol ratio of Soxylat A 25-7 and acrylate is 1:1.5, ammonium persulphate consumption is the 10%(massfraction of acrylate consumption), the consumption of water is to add at 60%, 60～80 ℃ of material gross weight to react 4h, obtains Soxylat A 25-7-acrylic ester polymer.
Selection grading distribution scheme is: >200 order 90%, and 100-200 order 6%, 60-100 order 4%, by Ramsbottom carbon powder 50g, rapid stirring after water 38ml mixes according to abovementioned steps with additive, subsequently with 1500rmin
-1after stirring 10min, prepare water charcoal slurry product.Water charcoal slurry concentration is 56.50%, and viscosity is 1100mpaS, and mobility is better, and stability is high, and standing 5d is without bleed, and standing 20d is for can recover soft precipitation.
Embodiment 2: selecting additive is Soxylat A 25-7-acrylic ester polymer and Xylo-Mucine, and its massfraction is 1.0% of blue charcoal end siccative, wherein, and Soxylat A 25-7-acrylic ester polymer 0.5%, Xylo-Mucine 0.5%.Selection grading distribution scheme is: >200 order 80%, and 100-200 order 15%, 60-100 order 5%, by Ramsbottom carbon powder 50g, rapid stirring after water 37ml mixes according to abovementioned steps with additive, subsequently with 1500rmin
-1after stirring 10min, prepare water charcoal slurry product.Water charcoal slurry concentration is 57.14%, and viscosity is 1200mpaS, and stability is higher, and mobility is better, and standing 5d is without bleed, and standing 17d is for can recover soft precipitation.
Embodiment 3: selecting additive is Soxylat A 25-7-acrylic ester polymer and Xylo-Mucine, and its massfraction is 1.0% of blue charcoal end siccative, wherein, and Soxylat A 25-7-acrylic ester polymer 0.5%, Xylo-Mucine 0.5%.Selection grading distribution scheme is: >200 order 67%, and 100-200 order 18%, 60-100 order 15%, by Ramsbottom carbon powder 50g, water 38ml mixes according to abovementioned steps with additive, subsequently with 1500rmin
-1after stirring 10min, prepare water charcoal slurry product.Water charcoal slurry concentration is 56.50%, and viscosity is 900mpaS, good fluidity, and stability is higher, and standing 4d is without bleed, and standing 10d is for can recover soft precipitation.
Embodiment 4: select grading distribution scheme to be: >200 order 80%, 100-200 order 15%, 60-100 order 5%.Selection additive is that Soxylat A 25-7-acrylic ester polymer, its massfraction of Xylo-Mucine are 1.0% of blue charcoal end siccative, wherein, and Soxylat A 25-7-acrylic ester polymer 0.4%, Xylo-Mucine 0.6%.By Ramsbottom carbon powder 50g, rapid stirring after water 38ml mixes according to abovementioned steps with additive, subsequently with 1500rmin
-1after stirring 10min, prepare water charcoal slurry product.Water charcoal slurry concentration is 56.53%, and viscosity is 920mpaS, good fluidity, and stability is high, and standing 5d is without bleed, and standing 20d is for can recover soft precipitation.
Embodiment 5: select grading distribution scheme to be: >200 order 80%, 100-200 order 15%, 60-100 order 5%.Selection additive is Soxylat A 25-7-acrylic ester polymer, Xylo-Mucine, and its massfraction is 0.9% of blue charcoal end siccative, wherein, and Soxylat A 25-7-acrylic ester polymer 0.3%, Xylo-Mucine 0.6%.By Ramsbottom carbon powder 50g, rapid stirring after water 37ml mixes according to abovementioned steps with additive, subsequently with 1500rmin
-1after stirring 10min, prepare water charcoal slurry product.Water charcoal slurry concentration is 57.18%, and viscosity is 1220mpaS, and mobility is better, and stability is high, and standing 5d is without bleed, and standing 18d is for can recover soft precipitation.
Embodiment 6: select grading distribution scheme to be: >200 order 80%, 100-200 order 15%, 60-100 order 5%.Selection additive is Soxylat A 25-7-acrylic ester polymer, Xylo-Mucine, and its massfraction is 1.5% of blue charcoal end siccative, wherein, and Soxylat A 25-7-acrylic ester polymer 0.5%, Xylo-Mucine 1.0%.By Ramsbottom carbon powder 50g, rapid stirring after water 35ml mixes according to abovementioned steps with additive, subsequently with 1500rmin
-1stir 5min, then with 500rmin
-1after low rate mixing 5min, prepare water charcoal slurry product.Water charcoal slurry concentration is 58.30%, and viscosity is 960mpaS, good fluidity, and stability is high, and standing 7d is without bleed, and standing 25d is for can recover soft precipitation.
Being take in blue charcoal end in the present invention is body material, adding under the condition of a small amount of additive, carry out stir process with a certain amount of water and produce water charcoal slurry, emphasis has solved kind and the consumption of grain size distribution and additive and has selected two hang-ups, successfully prepared the water charcoal slurry product of low viscosity, high density, high stability, further expanded the scope of utilizing of the blue charcoal of solid product after low-disintegration coal destructive distillation, be a kind of effective clean coal technology, technical progress and the Sustainable development of the blue charcoal industry of China are had important practical significance.
Claims (7)
1. take blue charcoal end prepares the method for water charcoal slurry as raw material, it is characterized in that, take the lower-grade metamorphic bituminous blue charcoal of middle low temperature pyrogenation product end to prepare water charcoal slurry as raw material, and lower-grade metamorphic bituminous is weakly caking coal, non-caking coal or long-flame coal, comprises the steps:
Step 1 is carried out drying treatment by blue charcoal end under 100 ℃ of conditions, with being placed in grinding machine, carries out ore grinding, obtains the powder of size fractionated after screening is processed, and according to set grading distribution scheme, carries out batch mixing and fully mixes;
Step 2, is dissolved in quantitative additive in a certain amount of water, obtains mixing solutions;
Step 3, by the mixed Ramsbottom carbon powder of step 1 gained and step 2 gained additive aqueous solution, stirs and obtains water charcoal slurry.
2. take according to claim 1 blue charcoal end prepares the method for water charcoal slurry as raw material, it is characterized in that, in described step 1, adopt dry method griding technology to obtain the powder of size fractionated, grading distribution scheme is (massfraction) :-200 orders account for 60-90%, 100-200 order accounts for 5-20%, and 60-100 order accounts for 5-20%.
3. take according to claim 1 blue charcoal end prepares the method for water charcoal slurry as raw material, it is characterized in that the polymkeric substance that in described step 2, additive is a kind of Soxylat A 25-7-acrylate and the mixture of Xylo-Mucine.
4. according to take blue charcoal end described in claim 1 or 3, prepare the method for water charcoal slurry as raw material, it is characterized in that, described additive amount (massfraction) is the 0.1-2.0% of blue charcoal end siccative amount, wherein, the polymkeric substance of Soxylat A 25-7-acrylate accounts for 0.1-0.5%, and Xylo-Mucine accounts for 0-1.5%.
5. take according to claim 3 blue charcoal end prepares the method for water charcoal slurry as raw material, it is characterized in that, the preparation method of the polymkeric substance of described Soxylat A 25-7-acrylate is: a certain amount of Soxylat A 25-7 is water-soluble at 60 ℃, stir 30min, drip acrylate and initiator ammonium persulfate, the mol ratio of Soxylat A 25-7 and acrylate is 1:1.5, ammonium persulphate consumption is the 10%(massfraction of acrylate consumption), the consumption of water is to add 60% of material gross weight, at 60～80 ℃, react 4h, obtain Soxylat A 25-7-acrylic ester polymer.
6. take according to claim 1 blue charcoal end prepares the method for water charcoal slurry as raw material, it is characterized in that, in described step 2, the consumption of water calculates according to water charcoal slurry concentration and additive amount, and calculation formula is: water coal slurry concentration (massfraction %)=dry coal quality (g)/[dry coal quality (g)+water (g)+additive (g)] * 100%.
7. take according to claim 1 blue charcoal end prepares the method for water charcoal slurry as raw material, it is characterized in that, in step 3 blue charcoal end with the stirring of additive aqueous solution first with 1500～2000rmin
-1speed rapid stirring to mixture become slurry shape, then with 400～500rmin
-1speed low rate mixing.
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| CN109294642A (en) * | 2018-10-26 | 2019-02-01 | 宁夏然尔特工业产业研究院（有限公司） | A kind of water-coal-slurry and preparation method thereof |
| CN110240960A (en) * | 2019-06-13 | 2019-09-17 | 国家能源投资集团有限责任公司 | A kind of pulping process that low-disintegration coal is coupled with semicoke |
| CN111534340A (en) * | 2020-04-21 | 2020-08-14 | 梵境新能源科技(浙江)有限公司 | Gasified coal water slurry prepared by utilizing multi-source wastes and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106190375A (en) * | 2016-08-17 | 2016-12-07 | 中国石化长城能源化工（宁夏）有限公司 | A kind of industry Ramsbottom carbon powder and biochemical sludge are mixed with water-coal-slurry method |
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| CN111534340A (en) * | 2020-04-21 | 2020-08-14 | 梵境新能源科技(浙江)有限公司 | Gasified coal water slurry prepared by utilizing multi-source wastes and preparation method thereof |
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