CN109628178A - A kind of method that rod mill prepares high-concentration coal-water slurry - Google Patents
A kind of method that rod mill prepares high-concentration coal-water slurry Download PDFInfo
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- CN109628178A CN109628178A CN201910115961.XA CN201910115961A CN109628178A CN 109628178 A CN109628178 A CN 109628178A CN 201910115961 A CN201910115961 A CN 201910115961A CN 109628178 A CN109628178 A CN 109628178A
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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
- 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
- C10L2290/28—Cutting, disintegrating, shredding or grinding
Abstract
The present invention provides a kind of methods that rod mill prepares high-concentration coal-water slurry, comprising the following steps: coal, water, additive three are mixed and made into coal-water mixture by 1.；2. coal-water mixture is added in rod mill, the thick slurries of water-coal-slurry are ground to obtain；3. the thick slurries of water-coal-slurry through rotary screen remove impurity obtain water-coal-slurry screened stock liquid, and be transported in water-coal-slurry storage tank store it is spare.Water-coal-slurry is ground to grind three times in rod mill, and abrasive media is rod iron in rod mill, and rod iron is made of the rod iron of at least three kinds different-diameters.The modest viscosity of the water-coal-slurry prepared through the invention, coal slurry even particle size distribution and without lamination, gasification outlet of still raw gas available gas ingredient can be improved to 81% or more when use, and ton ammonia coal consumption reduces and synthesis hydrazine yield increases, and production cost reduces.
Description
Technical field
The invention belongs to Coal Clean coal technical fields in Chemical Manufacture, are related to gasified coal water slurry technology of preparing, specifically relate to
And a kind of method that rod mill prepares high-concentration coal-water slurry.
Background technique
Water-coal-slurry is a kind of novel, efficient, clean coal derived fuel, is the newcomer of fuel family, it is by 65%-70%
Different grain size distribution coal dust, the water of 29-34% or so and about 1% chemical addition agent made of mixture.It has petroleum one
The mobility of sample, calorific value are equivalent to the half of oil, referred to as liquid coal product.Water-coal-slurry is able to maintain the physical chemistry of coal
Can, and energy image-stone oil equally has good mobility and stability, and easily stored and adjustment is a kind of clean combustion of low pollution
Material, can be with spray burning and high combustion efficiency.
With the rapid development of coal chemical industry, clean coal technology is increasingly paid attention to by industry, and the dosage of water-coal-slurry is more next
It is bigger.And as demand of the Chemical Manufacture to raw gas (being generated by cool water mixture burning) increasingly increases, often by mentioning in production
The operating load of high high-pressure coal pulp pump improves the method for water coal slurry concentration to meet the needs of production.And high-pressure coal pulp pump is excessively high
Operating load crankshaft wear can be made to accelerate, cause coal slurry pump service life to shorten, the gasification furnace even running period shortens；And it mentions
High water coal slurry concentration improve the water-coal-slurry gas production of unit volume will, and gas production increases energy under gasification furnace full load situation
Enough meets the needs of production.
Currently, gasified coal water slurry, using conventional grinding machine pulping process, by coal, water and adds the preparation method comprises the following steps: using coal as raw material
Add agent that rod mill or ball mill are added by a certain percentage, water-coal-slurry product can be made by once being ground.But pass through the above work
The water-coal-slurry of industry preparation is because of granularity unevenness, and coal-water fluid concentration is low, rheological characteristic and atomization are poor, leads to coal water slurry gasification efficiency and has
It is generally relatively low to imitate gas yield；And when in use, because the granularity of coal grain in water-coal-slurry is uneven, spray nozzle clogging is be easy to cause to cause to stop production
Maintenance, extends the period of production and improves the cost of production.
In view of this, it is necessary to the method for water-coal-slurry in the prior art preparation be improved, to solve the above problems.
Summary of the invention
The purpose of the present invention is to provide a kind of methods that rod mill prepares high-concentration coal-water slurry, prepare through the invention
The water-coal-slurry of high concentration, viscosity of coal slurry are suitable for that the mobility and sprayability of water-coal-slurry are preferable.
Realize that the technical solution of goal of the invention is as follows: a kind of method that rod mill prepares high-concentration coal-water slurry, including it is following
Step:
1. coal, water, additive three are mixed and made into coal-water mixture；
2. coal-water mixture is added in rod mill, the thick slurries of water-coal-slurry are ground to obtain；
3. the thick slurries of water-coal-slurry remove impurity through rotary screen and obtain water-coal-slurry screened stock liquid, and are transported in water-coal-slurry storage tank and are stored
It is spare.
In step 2, water-coal-slurry is ground to grind three times in rod mill, comprising: by coal, first part's water, additive three
Person's mixing is placed in progress first time grinding in rod mill；Second part water is added in first time lapping liquid to be ground for the second time
Mill；It carries out mixing progress with secondary lapping liquid by being transported in rod mill in part water-coal-slurry screened stock liquid through pump in the step 3
Third time is ground.
Abrasive media is rod iron in rod mill, and rod iron is made of the rod iron of at least three kinds different-diameters.
Wherein, rod iron is made of three kinds of different rod irons of length same diameter, the diameter of three kinds of rod irons be respectively Ф 75mm,
Ф 65mm, Ф 50mm, and diameter is Ф 75mm, the mass ratio of three kinds of rod irons of Ф 65mm, Ф 50mm is 4:4:2.
It wherein, is the granularity for further decreasing the coal in water-coal-slurry screened stock liquid, the coal grain that will be greater than 200 mesh carries out further
Grinding, to improve the ratio of the coal grain of 200 ~ 325 mesh granularities in water-coal-slurry screened stock liquid, the part water that is added in third time grinding
Coal slurry screened stock liquid is 15 ~ 25%.
Further, to improve the concentration of water-coal-slurry and stablizing in 62.5%, 800-1000cp, adding water inventory is coal weight
2.45 ~ 2.90 times of amount.It will lead to the increase of the waste of water resource and the pressure of later period water treatment facilities if water consumption is much,
If the abrasion of the too small nozzle that can make gasification outlet of still of water consumption is accelerated and causes spray nozzle clogging situation, adding for production cost is caused
Greatly.
Preferably, it in order to improve the grinding efficiency of water-coal-slurry, and avoids for the first time when grinding, the concentration of coal is excessive to lead to steel
Coal grain is viscous glutinous on stick, makes add water inventory 60 ~ 70% of first part's water first part water and second part water.
Preferably, adding water inventory is 2.75 times of coal weight.
Wherein, because cold water coal slurry concentration improve, for make water-coal-slurry viscosity reduce and guarantee water-coal-slurry stability and
Mobility, additive additional amount are 1.4 ‰ ~ the 2.0 ‰ of coal weight.
Preferably, additive additional amount is the 1.65 ‰ of coal weight.
Compared with prior art, the invention has the advantage that:
1. the raw gas available gas ingredient 75% through the outlet of still that gasifies before water-coal-slurry preparation process amelioration, water-coal-slurry after improvement
Raw gas available gas ingredient through the outlet of still that gasifies is greater than 81%, and the utilization rate of water-coal-slurry greatly improves.
2. the coal grain of 200 ~ 325 mesh granularities greatly improves in the water-coal-slurry through grinding three times, reduce Cws Spray gas
The wear rate for changing the nozzle of outlet of still, improves the service life of nozzle, reduces production cost.
3. the first part's water for being added 60 ~ 70% in grinding for the first time is ground for the first time, the granularity of coal raw material is made to become smaller；
Second is carried out in the second part water for being added remaining 30 ~ 40% to grind, and is diluted the bulky grain in coal slurry after the concentration of coal slurry
Coal grain is further ground；Again by carrying out the coal grain greater than 200 mesh in filtered 15 ~ 25% water-coal-slurry screened stock liquid
Third time is ground, and the coal particle size ratio of 200 ~ 325 mesh in water-coal-slurry is made to increase and the size of coal grain in water-coal-slurry is made to tend to be uniform
Change.
4. the rod iron of rod mill is divided into three kinds of specification rod irons, improve the working efficiency of rod mill, the steel of three kinds of diameters
Stick keeps coal particle size in water-coal-slurry more uniform.
5. preceding to improvement and improved water-coal-slurry compares in production, according to two gasification furnace loads in 82m3/
H analyzes the benefit of coal slurry concentrate acquirement to calculate.Gasification furnace gas production increases 3000m per hour3, being converted into synthesis ammonia is per small
Shi Zengjia synthesizes ammonia about 0.45t and synthesizes about 2300 yuan/t of ammonia unit price.0.45t/h × 2300 yuan/t=1035 yuan/h, 1035 yuan/h ×
For 24 hours=24840 yuan, increased cost is removed, about 18000 yuan of productivity effect can be increased daily.
Detailed description of the invention
Fig. 1 is the flow chart of water-coal-slurry of the present invention preparation.
Specific embodiment
Invention is described in detail in each embodiment shown in reference to the accompanying drawing, but it should be stated that, these realities
The mode of applying not is limitation of the present invention, those of ordinary skill in the art according to these embodiments made by function, method or
Equivalent transformation or substitution in person's structure, all belong to the scope of protection of the present invention within.
In the description of the present embodiment, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description the invention and simplifies description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For the limitation to the invention.
In addition, term " first ", " second ", " third " etc. are used for description purposes only, it is not understood to indicate or imply
Relative importance or the quantity for implicitly indicating indicated technical characteristic.The feature of " first ", " second " etc. is defined as a result,
It can explicitly or implicitly include one or more of the features.In the description of the invention, unless otherwise indicated,
The meaning of " plurality " is two or more.
Term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to removable
Connection is unloaded, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, can pass through
Concrete condition understands concrete meaning of the above-mentioned term in the invention.
Embodiment 1:
It please join shown in Fig. 1, Fig. 1 is the flow chart of water-coal-slurry of the present invention preparation.In the present embodiment, a kind of rod mill preparation is high
The method of concentration water-coal-slurry, comprising the following steps:
1. by coal (using family's loess hills coal), the 165L first part water (i.e. 165KG), 165G additive (main component of 100KG
For wooden sodium sulfonate) three is mixed and made into coal-water mixture, and it is placed in grinder and carries out grinding 1min for the first time；
2. 110 L second part water (i.e. 110 L) are added in grinder again carries out second of grinding 1min；
3. being slowly added to the water-coal-slurry screened stock liquid of 75L(that back segment filters out about 20%) to carry out third time grinding in grinder to make
For at the thick slurries of water-coal-slurry；
4. the thick slurries of water-coal-slurry are discharged from grinder, impurity is filtered to remove through the rotary screen that sieve pore specification is 3.5mm × 20mm and is obtained
Water-coal-slurry screened stock liquid, water-coal-slurry screened stock liquid are transported in water-coal-slurry storage tank through low pressure coal slurry pump, wherein about 20% water-coal-slurry screened stock
Liquid, which is transported in grinder to mix with water-coal-slurry in grinder through low pressure coal slurry pump, carries out third time grinding.
Wherein, grinder is rod mill, and the abrasive media of rod mill is rod iron, and rod iron always weighs about 90T, including length is about
5m, diameter are Ф 75mm, tri- kinds of Ф 65mm, Ф 50mm rod irons, and the weight ratio of three kinds of rod irons is 4:4:2.
Detected and produced verifying:
1. the thin concentration of slurry of water-coal-slurry is 62.7%, 800-1000cp in storage tank, the coal particle size of 200 ~ 325 mesh granularities accounts for 70%, puts
Coal slurry even particle size distribution is set in 1 ~ 2 day storage tank in water-coal-slurry screened stock liquid without delamination, and the viscosity of water-coal-slurry screened stock liquid and
Mobility is constant.
2. in use, nozzle service life extends about 40% in gasification furnace, and nozzle is without stopping state.
3. after use, the raw gas available gas ingredient for the outlet of still that gasifies is 81.5%.
Embodiment 2:
It please join shown in Fig. 1, Fig. 1 is the flow chart of water-coal-slurry of the present invention preparation.In the present embodiment, a kind of rod mill preparation is high
The method of concentration water-coal-slurry, comprising the following steps:
1. by coal (using the purebred coal of caragana microphylla tower coal), the 205.8L first part water (i.e. 205.8KG), 180G additive of 120KG
(main component is wooden sodium sulfonate) three is mixed and made into coal-water mixture, is placed in progress first time grinding in grinder
1.5min；
2. 88.2L second part water (i.e. 88.2 L) are added in grinder again carries out second of grinding 1min；
3. being slowly added to the water-coal-slurry screened stock liquid of 63L(that back segment filters out about 15%) to carry out third time grinding in grinder to make
For at the thick slurries of water-coal-slurry；
4. the thick slurries of water-coal-slurry are discharged from grinder, impurity is filtered to remove through the rotary screen that sieve pore specification is 3.5mm × 20mm and is obtained
Water-coal-slurry screened stock liquid, water-coal-slurry screened stock liquid are transported in water-coal-slurry storage tank through low pressure coal slurry pump, wherein about 15% water-coal-slurry screened stock
Liquid, which is transported in grinder to mix with water-coal-slurry in grinder through low pressure coal slurry pump, carries out third time grinding.
Wherein, grinder is rod mill, and the abrasive media of rod mill is rod iron, and rod iron always weighs about 87T, including length is about
5m, diameter are Ф 75mm, tri- kinds of Ф 65mm, Ф 50mm rod irons, and the weight ratio of three kinds of rod irons is 4:4:2.
Detected and produced verifying:
1. the thin concentration of slurry of water-coal-slurry is 61.9%, 800-1000cp in storage tank, the coal particle size of 200 ~ 325 mesh granularities accounts for 83%, puts
Coal slurry even particle size distribution is set in 1 ~ 2 day storage tank in water-coal-slurry screened stock liquid without delamination, and the viscosity of water-coal-slurry screened stock liquid and
Mobility is constant.
2. in use, nozzle service life extends about 50% in gasification furnace, and nozzle is without stopping state.
3. after use, the raw gas available gas ingredient for the outlet of still that gasifies is 79%.
Embodiment 3:
It please join shown in Fig. 1, Fig. 1 is the flow chart of water-coal-slurry of the present invention preparation.In the present embodiment, a kind of rod mill preparation is high
The method of concentration water-coal-slurry, comprising the following steps:
1. by the coal (using Mixture Density Networks), 150L first part water (i.e. 150KG), 160G additive of 80KG, (main component is wood
Matter sodium sulfonate) three is mixed and made into coal-water mixture, and it is placed in grinder and carries out grinding 2.0min for the first time；
2. 82L second part water (i.e. 82 L) are added in grinder again carries out second of grinding 1.5min；
3. being slowly added to the water-coal-slurry screened stock liquid of 78L(that back segment filters out about 25%) to carry out third time grinding in grinder to make
For at the thick slurries of water-coal-slurry；
4. the thick slurries of water-coal-slurry are discharged from grinder, impurity is filtered to remove through the rotary screen that sieve pore specification is 3.5mm × 20mm and is obtained
Water-coal-slurry screened stock liquid, water-coal-slurry screened stock liquid are transported in water-coal-slurry storage tank through low pressure coal slurry pump, wherein about 25% water-coal-slurry screened stock
Liquid, which is transported in grinder to mix with water-coal-slurry in grinder through low pressure coal slurry pump, carries out third time grinding.
Wherein, grinder is rod mill, and the abrasive media of rod mill is rod iron, and rod iron always weighs about 90T, including length is about
5m, diameter are Ф 75mm, tri- kinds of Ф 65mm, Ф 50mm rod irons, and the weight ratio of three kinds of rod irons is 4:4:2.
Detected and produced verifying:
1. the thin concentration of slurry of water-coal-slurry is 63.1%, 800-1000cp in storage tank, the coal particle size of 200 ~ 325 mesh granularities accounts for 85%, puts
Coal slurry even particle size distribution is set in 1 ~ 2 day storage tank in water-coal-slurry screened stock liquid without delamination, and the viscosity of water-coal-slurry screened stock liquid and
Mobility is constant.
2. in use, nozzle service life extends about 80% in gasification furnace, and nozzle is without stopping state.
3. after use, the raw gas available gas ingredient for the outlet of still that gasifies is 83%.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (8)
1. a kind of method that rod mill prepares high-concentration coal-water slurry, comprising the following steps: 1. mix coal, water, additive three
Coal-water mixture is made；2. coal-water mixture is added in rod mill, the thick slurries of water-coal-slurry are ground to obtain；3. the thick slurries warp of water-coal-slurry
Rotary screen remove impurity obtain water-coal-slurry screened stock liquid, and be transported in water-coal-slurry storage tank store it is spare；It is characterized by: step
In 2, water-coal-slurry is ground to grind three times in rod mill, comprising: mixes coal, first part's water, additive three and is placed in rod milling
First time grinding is carried out in machine；Second part water is added in first time lapping liquid and carries out second of grinding；It will be in the step 3
It is transported in rod mill mix with secondary lapping liquid through pump in the water-coal-slurry screened stock liquid of part and carries out third time grinding；
Abrasive media is rod iron in the rod mill, and rod iron is made of the rod iron of at least three kinds different-diameters.
2. the method that a kind of rod mill according to claim 1 prepares high-concentration coal-water slurry, it is characterised in that: the rod iron
It being made of three kinds of different rod irons of length same diameter, the diameter of three kinds of rod irons is respectively Ф 75mm, Ф 65mm, Ф 50mm, and
Diameter is Ф 75mm, the mass ratio of three kinds of rod irons of Ф 65mm, Ф 50mm is 4:4:2.
3. the method that a kind of rod mill according to claim 1 prepares high-concentration coal-water slurry, it is characterised in that: the third
The part water-coal-slurry screened stock liquid being added in secondary grinding is 15 ~ 25%.
4. the method that a kind of rod mill according to claim 1 prepares high-concentration coal-water slurry, it is characterised in that: described plus water
Total amount is 2.45 ~ 2.90 times of coal weight.
5. the method that a kind of rod mill according to claim 4 prepares high-concentration coal-water slurry, it is characterised in that: described first
Part water is add water inventory 60 ~ 70% of first part's water and second part water.
6. the method that a kind of rod mill according to claim 4 prepares high-concentration coal-water slurry, it is characterised in that: described plus water
Total amount is 2.75 times of coal weight.
7. the method that a kind of rod mill according to claim 1 prepares high-concentration coal-water slurry, it is characterised in that: the addition
Agent additional amount is 1.4 ‰ ~ the 2.0 ‰ of coal weight.
8. the method that a kind of rod mill according to claim 7 prepares high-concentration coal-water slurry, it is characterised in that: the addition
Agent additional amount is the 1.65 ‰ of coal weight.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110327834A (en) * | 2019-07-26 | 2019-10-15 | 南京弘扬新材料科技有限公司 | A kind of gasified coal water slurry concentrate equipment |
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| CN107727543A (en) * | 2017-10-17 | 2018-02-23 | 佛山市南海港能燃料物料有限公司 | A kind of water-coal-slurry paste-forming properties test method |
| CN107987904A (en) * | 2017-12-11 | 2018-05-04 | 南京大学 | A kind of method that partial reflux and dosing twice prepare high concentration gasification water-coal-slurry |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2439131C1 (en) * | 2010-07-13 | 2012-01-10 | Лев Серафимович Скворцов | Method for coal-water fuel production |
| CN101955824A (en) * | 2010-09-06 | 2011-01-26 | 江苏秋林重工股份有限公司 | Complete two-stage slurry production equipment of water-coal-slurry and gasified water-coal-slurry by using low-rank coal fuel |
| CN205740928U (en) * | 2016-06-28 | 2016-11-30 | 新能凤凰（滕州）能源有限公司 | High-quality water-coal-slurry prepares processing system |
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| CN110327834A (en) * | 2019-07-26 | 2019-10-15 | 南京弘扬新材料科技有限公司 | A kind of gasified coal water slurry concentrate equipment |
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