CN105733714A - Method for preparing coal water slurry by means of hydrothermal lignite upgrading - Google Patents
Method for preparing coal water slurry by means of hydrothermal lignite upgrading Download PDFInfo
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- CN105733714A CN105733714A CN201610134882.XA CN201610134882A CN105733714A CN 105733714 A CN105733714 A CN 105733714A CN 201610134882 A CN201610134882 A CN 201610134882A CN 105733714 A CN105733714 A CN 105733714A
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- coal
- water
- lignite
- slurry
- brown coal
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Classifications
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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
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
- F23K1/02—Mixing solid fuel with a liquid, e.g. preparing slurries
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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
- C10L1/2431—Organic compounds containing sulfur, selenium and/or tellurium sulfur bond to oxygen, e.g. sulfones, sulfoxides
- C10L1/2437—Sulfonic acids; Derivatives thereof, e.g. sulfonamides, sulfosuccinic acid esters
-
- 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
- C10L1/30—Organic compounds compounds not mentioned before (complexes)
- C10L1/301—Organic compounds compounds not mentioned before (complexes) derived from metals
Abstract
The invention discloses a method for preparing coal water slurry by means of hydrothermal lignite upgrading. The method includes steps of (1), pre-processing lignite, to be more specific, coarsely smashing the raw lignite, sieving the coarsely smashed lignite by the aid of 200-mesh sieves, grinding the coarsely smashed lignite in a ball mill and screening the lignite by the aid of 100-mesh sieves to obtain lignite particles with the particle sizes smaller than 74 micrometers; (2), carrying out hydrothermal lignite upgrading, to be more specific, arranging the lignite and deionized water in a closed high-pressure reaction kettle, filling the high-pressure reaction kettle with nitrogen, allowing the high-pressure reaction kettle to stand still for 2 h, detecting leakage, exhausting the nitrogen, heating the high-pressure reaction kettle until the temperature of the high-pressure reaction kettle reaches 250-300 DEG C, allowing substances to stay in the high-pressure reaction kettle for 2-3 h, cooling the high-pressure reaction kettle until the temperature of the high-pressure reaction kettle reaches the room temperature, separating solid from liquid in products to obtain upgraded coal and waste liquid, and finely grinding the upgraded coal until the size of the upgraded coal reaches 1-10 mm; (3), preparing the coal water slurry, to be more specific, mixing the upgraded coal, additives, distilled water or/and the waste liquid with one another to obtain mixtures, arranging the mixtures in a stirrer, stirring the mixtures at the rotational speeds of 600-1200 r/min, taking the mixtures out of the stirrer and allowing the mixtures to stand still to obtain the coal water slurry. The method has the advantages that whole procedures are carried out in coal water slurry states, accordingly, the method is free of dust pollution or burning explosion, and excellent concentration effects can be realized; waste water is reused, accordingly, pollution can be reduced, the cost can be lowered, and the utilization rate of lignite resources can be increased.
Description
Technical field
The present invention paddles the preparing technical field of coal slurry, is specifically related to the method that water-coal-slurry is prepared in brown coal hydro-thermal upgrading.
Background technology
Water-coal-slurry be the coal by about 65%, the water of 34% and the additive of 1% obtained by Physical Processing a kind of low stain, high efficiency, can the generation oil coal based fluid fuel of pipeline conveying, there is flameholding, the advantages such as few are put in disposal of pollutants.Water-coal-slurry is mainly with bituminous coal for raw material, but the high-order coals such as bituminous coal are in short supply, and resource consumption is serious.Now currently mainly research adopts brown coal controlling the water circulation coal slurry, and brown coal have the features such as moisture height, high volatile, high ash, low heat value, many spaces, also has higher spontaneous combustion tendency, has the risk of blast in dry run.The drying means of brown coal mainly has heated air seasoning, steam seasoning, micro-wave drying method, solar energy drying method, mechanical hot pressing evaporation, dehydration of organic solvent method, hydrothermal treatment consists evaporation etc., hydro-thermal upgrading method can remove the moisture within low-order coal, improve matchmaker rank and calorific value, is conducive to improving paste-forming properties, mobility and the stability that water-coal-slurry is.
Adopt hot water upgrading method that brown coal are processed, substantial amounts of waste water can be produced, waste water contains substantial amounts of organic carbon and other combustibles, general method of wastewater treatment more typically has precipitation biochemical degradation blowdown to process, or adopting the gasification of nickel carbon catalyst to produce the imflammable gas rich in hydrogen and methane, the utilization of resources of waste water becomes the focus of research.
Summary of the invention
It is an object of the invention to, for prior art, it is provided that the method that water-coal-slurry is prepared in brown coal hydro-thermal upgrading.
For achieving the above object, the present invention takes techniques below scheme: brown coal hydro-thermal upgrading is prepared the method for water-coal-slurry and comprised the following steps:
(1) brown coal pretreatment；Former brown coal are carried out coarse pulverization, crosses 200 mesh sieves, then the brown coal of coarse pulverization are put into grinding in ball grinder, filter out the particle diameter brown coal grain less than 74um by 100 mesh sieve；
(2) brown coal hydro-thermal upgrading: brown coal and deionized water are placed in airtight autoclave, pass into the static 2h leak detection of nitrogen, after discharge nitrogen, after being warming up to 250～300 DEG C, stop 2～3h, be cooled to room temperature, by product solid-liquid separation, obtain upgraded coal and waste liquid, by levigate for upgraded coal to 1～10mm；
(3) water-coal-slurry is prepared: by upgraded coal, additive, distilled water or/and waste liquid mixing, being placed in agitator, the rotating speed at 600～1200r/min stirs 10～30min, stands and obtain water-coal-slurry after taking-up.
Wherein, described additive be methanonaphthalene sodium sulfonate-stupid vinyl sulfonic acid sodium-maleic acid receive condensation substance, methyl naphthalene sulfonic acid salt formaldehyde condensation products, petroleum sulfonate one or more, addition is the 0.2～1% of upgraded coal quality.
Wherein, in step (3), described upgraded coal, distilled water, waste liquid mixing ratio be 5g:0～1.5ml:1～1.5ml.
Wherein, wherein, in the reactor described in step (2), pressure is 2～15MPa.
Further, containing a lot of dissolved organic carbons, soluble inorganic carbon and several mineral materials in the product liquid of described hydro-thermal dehydration upgrading, such as potassium, calcium, sodium, magnesium, aluminum, ferrum and anion SO4 2-Deng, the dissolution of these materials improves the character of brown coal.
Further, containing substantial amounts of carbon dioxide in the gaseous product of described hydro-thermal dehydration upgrading, a small amount of nitrogen, carbon monoxide, oxygen and hydrogen sulfide, hydrothermal treatment consists has certain desulfurized effect.
Further, hydro-thermal upgrading improves the pore structure of brown coal, and the specific surface area of coal sample after making upgrading, specific pore volume be long-pending to be rolled aperture and all compare raw coal and decrease with product, decreases the porosity of brown coal, its structure tightr, weakening its solid water ability, water content reduces.
Further, described hydro-thermal upgraded product has substantial amounts of Organic substance and various ion, these materials serve the effect of part surface activating agent, surface tension of liquid is greatly lowered, in preparation water-coal-slurry process, these materials in waste liquid have the some properties of additive, by wastewater application in the preparation of water-coal-slurry, can reduce or cancel the use of additive, the cost of controlling the water circulation coal slurry can be reduced while Recycling of waste liquid.
The invention has the beneficial effects as follows:
1, hydrothermal treatment consists pulping technique overall process is water-coal-slurry state no dust pollution or fires, and concentration effect is good.
2, the method that with solid product, the waste water that brown coal hydro-thermal upgrading produces is mixed and made into water-coal-slurry, can process the substantial amounts of waste water that hydro-thermal upgrading produces effectively, reduces and pollutes, and can improve the utilization rate of lignite resource simultaneously.
3, the utilization of waste water can reduce or cancel the use of additive, reduces cost.
4, the water coal slurry concentration height of the present invention, good stability, cost are low.
Detailed description of the invention
Below in conjunction with specific embodiment, to further instruction of the present invention.
Embodiment 1
Brown coal hydro-thermal upgrading is prepared the method for water-coal-slurry and is comprised the following steps:
(1) brown coal pretreatment；Former brown coal are carried out coarse pulverization, crosses 200 mesh sieves, then the brown coal of coarse pulverization are put into grinding in ball grinder, filter out the particle diameter brown coal grain less than 74um by 100 mesh sieve；
(2) brown coal hydro-thermal upgrading: brown coal and deionized water are placed in airtight autoclave, pass into the static 2h leak detection of nitrogen, after discharge nitrogen, after being warming up to 280 DEG C, it is stop 3h under 10MPa at pressure, is cooled to room temperature, by product solid-liquid separation, obtain upgraded coal and waste liquid, by levigate for upgraded coal to 1mm；
(3) prepare water-coal-slurry: by upgraded coal, distilled water, waste liquid mixing ratio be 5g:1ml:1.5ml by after upgraded coal, distilled water, waste liquid mixing, it is placed in agitator, and add upgraded coal quality 0.8% methyl naphthalene sulfonic acid salt formaldehyde condensation products, rotating speed at 1000r/min stirs 20min, stands and obtain water-coal-slurry after taking-up.
Embodiment 2
Brown coal hydro-thermal upgrading is prepared the method for water-coal-slurry and is comprised the following steps:
(1) brown coal pretreatment；Former brown coal are carried out coarse pulverization, crosses 200 mesh sieves, then the brown coal of coarse pulverization are put into grinding in ball grinder, filter out the particle diameter brown coal grain less than 74um by 100 mesh sieve；
(2) brown coal hydro-thermal upgrading: brown coal and deionized water are placed in airtight autoclave, pass into the static 2h leak detection of nitrogen, after discharge nitrogen, after being warming up to 300 DEG C, it is stop 3h under 15MPa at pressure, is cooled to room temperature, by product solid-liquid separation, obtain upgraded coal and waste liquid, by levigate for upgraded coal to 10mm；
(3) prepare water-coal-slurry: by upgraded coal, distilled water, waste liquid mixing ratio be 5g:1.5ml:1.5ml by after upgraded coal, distilled water, waste liquid mixing, it is placed in agitator, and add upgraded coal quality 1% methanonaphthalene sodium sulfonate-stupid vinyl sulfonic acid sodium-maleic acid receive condensation substance, rotating speed at 1200r/min stirs 30min, stands and obtain water-coal-slurry after taking-up.
Embodiment 3
Brown coal hydro-thermal upgrading is prepared the method for water-coal-slurry and is comprised the following steps:
(1) brown coal pretreatment；Former brown coal are carried out coarse pulverization, crosses 200 mesh sieves, then the brown coal of coarse pulverization are put into grinding in ball grinder, filter out the particle diameter brown coal grain less than 74um by 100 mesh sieve；
(2) brown coal hydro-thermal upgrading: brown coal and deionized water are placed in airtight autoclave, pass into the static 2h leak detection of nitrogen, after discharge nitrogen, after being warming up to 250 DEG C, it is stop 2h under 2MPa at pressure, is cooled to room temperature, by product solid-liquid separation, obtain upgraded coal and waste liquid, by levigate for upgraded coal to 1mm；
(3) water-coal-slurry is prepared: be 5g:1.5ml by after upgraded coal, distilled water, waste liquid mixing by the mixing ratio of upgraded coal, waste liquid, it is placed in agitator, and add upgraded coal quality 1% petroleum sulfonate, 600r/min rotating speed stir 10min, stand after taking-up and obtain water-coal-slurry.
Claims (5)
1. the method that water-coal-slurry is prepared in the upgrading of brown coal hydro-thermal, it is characterised in that: it comprises the following steps:
(1) brown coal pretreatment；Former brown coal are carried out coarse pulverization, crosses 200 mesh sieves, then the brown coal of coarse pulverization are put into grinding in ball grinder, filter out the particle diameter brown coal grain less than 74um by 100 mesh sieve；
(2) brown coal hydro-thermal upgrading: brown coal and deionized water are placed in airtight autoclave in the ratio of 1g:1.5ml, pass into the static 2h leak detection of nitrogen, after discharge nitrogen, after being warming up to 250～300 DEG C, stop 2～3h, be cooled to room temperature, by product solid-liquid separation, obtain upgraded coal and waste liquid, by levigate for upgraded coal to 1～10mm；
(3) water-coal-slurry is prepared: by upgraded coal, additive, distilled water or/and waste liquid mixing, being placed in agitator, the rotating speed at 600～1200r/min stirs 10～30min, stands and obtain water-coal-slurry after taking-up.
2. the method that water-coal-slurry is prepared in brown coal hydro-thermal upgrading according to claim 1, it is characterized in that, described additive be methanonaphthalene sodium sulfonate-stupid vinyl sulfonic acid sodium-maleic acid receive condensation substance, methyl naphthalene sulfonic acid salt formaldehyde condensation products, petroleum sulfonate one or more.
3. the method that water-coal-slurry is prepared in brown coal hydro-thermal upgrading according to claim 1 and 2, it is characterised in that the addition of described additive is the 0.2～1% of upgraded coal quality.
4. the method that water-coal-slurry is prepared in brown coal hydro-thermal upgrading according to claim 1, it is characterised in that the upgraded coal described in step (3), distilled water, waste liquid mixing ratio be 5g:0～1.5ml:1～1.5ml.
5. the method that water-coal-slurry is prepared in brown coal hydro-thermal upgrading according to claim 1, it is characterised in that in described reactor, pressure is 2～15MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610134882.XA CN105733714A (en) | 2016-03-10 | 2016-03-10 | Method for preparing coal water slurry by means of hydrothermal lignite upgrading |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610134882.XA CN105733714A (en) | 2016-03-10 | 2016-03-10 | Method for preparing coal water slurry by means of hydrothermal lignite upgrading |
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| CN105733714A true CN105733714A (en) | 2016-07-06 |
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| CN201610134882.XA Pending CN105733714A (en) | 2016-03-10 | 2016-03-10 | Method for preparing coal water slurry by means of hydrothermal lignite upgrading |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111534354A (en) * | 2020-05-14 | 2020-08-14 | 太原理工大学 | Process and device for improving quality of waste oil and fat coal boiling |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1179464A (en) * | 1996-10-16 | 1998-04-22 | 杨国光 | Oil and coal-water slurry composition fuel and producing method thereof |
| CN101760267A (en) * | 2009-03-17 | 2010-06-30 | 顾大地 | Method for modifying lignite |
| US20140054503A1 (en) * | 2012-08-27 | 2014-02-27 | The Governors Of The University Of Alberta | Apparatus and method for upgrading coal |
| CN103865598A (en) * | 2012-12-13 | 2014-06-18 | 大唐国际化工技术研究院有限公司 | Method using brown coal for preparation of high density coal water slurry |
-
2016
- 2016-03-10 CN CN201610134882.XA patent/CN105733714A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1179464A (en) * | 1996-10-16 | 1998-04-22 | 杨国光 | Oil and coal-water slurry composition fuel and producing method thereof |
| CN101760267A (en) * | 2009-03-17 | 2010-06-30 | 顾大地 | Method for modifying lignite |
| US20140054503A1 (en) * | 2012-08-27 | 2014-02-27 | The Governors Of The University Of Alberta | Apparatus and method for upgrading coal |
| CN103865598A (en) * | 2012-12-13 | 2014-06-18 | 大唐国际化工技术研究院有限公司 | Method using brown coal for preparation of high density coal water slurry |
Non-Patent Citations (1)
| Title |
|---|
| 虞育杰: "褐煤水热脱水提质制备高浓度水煤浆的基础研究", 《中国博士学位全文数据库工程科技I辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111534354A (en) * | 2020-05-14 | 2020-08-14 | 太原理工大学 | Process and device for improving quality of waste oil and fat coal boiling |
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Application publication date: 20160706 |
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