CN207646155U - A kind of digestion system preparing ultra-clean coal - Google Patents
A kind of digestion system preparing ultra-clean coal Download PDFInfo
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- CN207646155U CN207646155U CN201721447963.1U CN201721447963U CN207646155U CN 207646155 U CN207646155 U CN 207646155U CN 201721447963 U CN201721447963 U CN 201721447963U CN 207646155 U CN207646155 U CN 207646155U
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Abstract
A kind of digestion system preparing ultra-clean coal, including：Fluid mix conveying appliance；Cold material import exports the subsection heating device being connected with the suspension of fluid mix conveying appliance；The thermostat that feed inlet is connected with the material outlet of subsection heating device；The resolution reaction unit that feed inlet is connected with the discharge port of thermostat；The decompressor step by step that feed inlet is connected with the discharge port of resolution reaction unit；The heat outlet of decompressor is connected with the thermal material import of subsection heating device step by step；The pressure stabilizing exhaust device that feed inlet is connected with the discharge port of decompressor step by step；The first equipment for separating liquid from solid and the second equipment for separating liquid from solid being connected successively with the discharge port of pressure stabilizing exhaust device are equipped with therebetween cleaning solution import；The washing liquid storage tank that discharge port is connected with cleaning solution import；The flash distillation plant that discharge port is connected with the feed inlet of washing liquid storage tank；The feed inlet of flash distillation plant is connected with the outlet of the cold material of subsection heating device.The system energy consumption is low, discharging any waste liquor amount is small.
Description
Technical field
The utility model is related to ultra-clean coal preparing technical fields, are to be related to a kind of preparing ultra-clean coal more specifically
Digestion system.
Background technology
Currently, large-scale developing and utilizing for coal brings severe ecological environment destruction and pollutant emission problem, coal
Purifying utilize of charcoal faces immense pressure and challenge.Purifying utilize of coal in China quickly grows, various new coal gasification
Technology is applied converts field in coal, and large-scale coal liquifaction, coal-ethylene glycol, coal-to-olefin device have been enter into the Industrial demonstration stage.
Although China has grasped the core technology of multinomial coal-cleaning utilization, coal-cleaning utilization integral level is not high, development by
The limitation of technology, policy and fund.
Ultra-clean coal (Ultra Clean Coal, abbreviation UCC) is the Filter Tuber For Clean Coal that content of ashes is no more than 1%, is to wash
Cleaned coal is raw material, is made by chemical cleaning, separation and filtering production.UCC is a kind of alternative energy source, biggest market potentiality be
Diesel oil substitute and heavy oil on power generation, steamer, truck and train, make coal resources efficiently, clean utilization, meet the energy and environmental protection wanted
It asks.Since last century, the developed countries such as Australia, Japan and Britain both participate in the research and exploitation of UCC technologies.Currently,
The technology of preparing of UCC includes Physical and chemical method, wherein chemical method mainly have hydrogen fluoride, acid-base method, molten caustic soda percolation,
Chemical coal technology etc..The external technology for having succeeded exploitation has Australian Auscoal techniques (existing Yan coal Australia UCC technologies), U.S.
State's Gravimelt techniques etc..In the world, UCC technical researches last longer, but the precedent without technology commercial development, Yan coal
Australia UCC technical research achievements maintain the leading position.
Australian Auscoal techniques (existing Yan coal Australia UCC technologies) prepare UCC technologies, i.e.,：Coal sample is through sodium hydroxide alkali
Liquid resolution is by silica, alumina and its derivative in coal ash, and dissolving generates silicate solutions at high temperature and sodalite solid is heavy
It forms sediment；Be continuing in sulfuric acid or hydrochloric acid and coal in remnants NaOH, while dissolving sodalite and other impurity；It is more that surface is washed with water
Remaining sulfuric acid and sulfate, prepares UCC.
But for Australian Auscoal techniques prepare UCC technologies, the most key step --- resolution work
It is in laboratory stage in skill correlative study at home and abroad, does not there is actual industrial system or cases of design, and laboratory is real
It tests flow and uses relatively simple heated constant temperature temperature-fall period, exploitativeness is insufficient for industrialization system；Energy consumption simultaneously
Height, discharging any waste liquor amount is big, less economical.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of digestion system preparing ultra-clean coal, there is energy consumption
Feature low, discharging any waste liquor amount is small is suitable for industrial applications.
The utility model provides a kind of digestion system preparing ultra-clean coal, including：
Fluid mix conveying appliance；The fluid mix conveying appliance goes out equipped with coal dust import, lye import and suspension
Mouthful；
Cold material import exports the subsection heating device being connected with the suspension；The subsection heating device is equipped with hot object
Material outlet, thermal material import and cold material outlet；
The thermostat that feed inlet is connected with the material outlet of the subsection heating device；
The resolution reaction unit that feed inlet is connected with the discharge port of the thermostat；
The decompressor step by step that feed inlet is connected with the discharge port of the resolution reaction unit；The decompressor step by step
Heat outlet is connected with the thermal material import of the subsection heating device；
The pressure stabilizing exhaust device that feed inlet is connected with the discharge port of the decompressor step by step；
The first equipment for separating liquid from solid being connected successively with the discharge port of the pressure stabilizing exhaust device and second is separated by solid-liquid separation dress
It sets；Cleaning solution import is equipped between first equipment for separating liquid from solid and the second equipment for separating liquid from solid；
The washing liquid storage tank that discharge port is connected with the cleaning solution import；
The flash distillation plant that discharge port is connected with the feed inlet of the washing liquid storage tank；The feed inlet of the flash distillation plant and institute
The cold material outlet for stating subsection heating device is connected.
Preferably, the subsection heating device is made of the N number of heat-exchanger rig being sequentially connected；Wherein 2≤N≤20；
The cold material import of 1st heat-exchanger rig is connected with suspension outlet, and the thermal material of n-th heat-exchanger rig goes out
Mouthful be connected with the feed inlet of the thermostat, along flow direction of material previous heat-exchanger rig material outlet with it is adjacent latter
The cold material import of a heat-exchanger rig is connected.
Preferably, the resolution reaction unit by be sequentially connected M clear up reactor group at；Wherein 1≤M≤5.
Preferably, the decompressor step by step is made of the multiple decompression tanks being sequentially connected；It is described decompression tank number with
The number of the heat-exchanger rig is equal；
Along the heat of the heat outlet and the N-n+1 heat-exchanger rig along flow direction of material of n-th of decompression tank of flow direction of material
Material inlet is connected；Wherein 1≤n≤N.
Preferably, the cold material outlet of each heat-exchanger rig is connected with the feed inlet of the flash distillation plant.
The utility model provides a kind of digestion system preparing ultra-clean coal, including：Fluid mix conveying appliance；It is described
Fluid mix conveying appliance is equipped with coal dust import, lye import and suspension outlet；Cold material import is exported with the suspension
Connected subsection heating device；The subsection heating device is equipped with material outlet, thermal material import and cold material outlet；Charging
The thermostat that mouth is connected with the material outlet of the subsection heating device；The discharge port phase of feed inlet and the thermostat
Resolution reaction unit even；The decompressor step by step that feed inlet is connected with the discharge port of the resolution reaction unit；It is described step by step
The heat outlet of decompressor is connected with the thermal material import of the subsection heating device；Feed inlet and the decompressor step by step
The connected pressure stabilizing exhaust device of discharge port；First to be connected successively with the discharge port of the pressure stabilizing exhaust device is separated by solid-liquid separation dress
It sets and the second equipment for separating liquid from solid；Between first equipment for separating liquid from solid and the second equipment for separating liquid from solid be equipped with cleaning solution into
Mouthful；The washing liquid storage tank that discharge port is connected with the cleaning solution import；Discharge port is connected with the feed inlet of the washing liquid storage tank
Flash distillation plant；The feed inlet of the flash distillation plant is connected with the outlet of the cold material of the subsection heating device.With the prior art
It compares, the digestion system provided by the utility model for preparing ultra-clean coal carries out segmentation using the hot gas for depressurizing generation step by step and adds
Heat, and the cold material flash distillation after heat exchange is reused in washing；Discharging any waste liquor is fully recycled simultaneously, to make this practicality
The digestion system and method for the preparation ultra-clean coal of novel offer have the characteristics that low energy consumption, discharging any waste liquor amount is small.Experimental result
Show that digestion system provided by the utility model is suitable for industrial applications.
The stabilization of resolution heating thermostatic process is accurately controlled in addition, can be reached by the parameter of control decompression processes at different levels
System, to be conducive to the progress of digestion process while saving energy consumption, so as to get resolution coal sample be further prepared
Ultra-clean coal has lower ash content.
Description of the drawings
Fig. 1 is the structural schematic diagram of the digestion system for the preparation ultra-clean coal that the utility model embodiment provides.
Specific implementation mode
Below in conjunction with the utility model embodiment, the technical solution of the utility model is clearly and completely described,
Obviously, the described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.Based on this reality
It is obtained by those of ordinary skill in the art without making creative efforts every other with the embodiment in novel
Embodiment shall fall within the protection scope of the present invention.
The utility model provides a kind of digestion system preparing ultra-clean coal, including：
Fluid mix conveying appliance；The fluid mix conveying appliance goes out equipped with coal dust import, lye import and suspension
Mouthful；
Cold material import exports the subsection heating device being connected with the suspension；The subsection heating device is equipped with hot object
Material outlet, thermal material import and cold material outlet；
The thermostat that feed inlet is connected with the material outlet of the subsection heating device；
The resolution reaction unit that feed inlet is connected with the discharge port of the thermostat；
The decompressor step by step that feed inlet is connected with the discharge port of the resolution reaction unit；The decompressor step by step
Heat outlet is connected with the thermal material import of the subsection heating device；
The pressure stabilizing exhaust device that feed inlet is connected with the discharge port of the decompressor step by step；
The first equipment for separating liquid from solid being connected successively with the discharge port of the pressure stabilizing exhaust device and second is separated by solid-liquid separation dress
It sets；Cleaning solution import is equipped between first equipment for separating liquid from solid and the second equipment for separating liquid from solid；
The washing liquid storage tank that discharge port is connected with the cleaning solution import；
The flash distillation plant that discharge port is connected with the feed inlet of the washing liquid storage tank；The feed inlet of the flash distillation plant and institute
The cold material outlet for stating subsection heating device is connected.
Referring to Fig. 1, Fig. 1 is the structural representation of the digestion system for the preparation ultra-clean coal that the utility model embodiment provides
Figure.Wherein, A1 is fluid mix conveying appliance, and B1~B9 is subsection heating device, and B10 is thermostat, and A2~A3 is resolution
Reaction unit, B12~B20 are that decompressor, B21 are pressure stabilizing exhaust device step by step, and A4 is the first equipment for separating liquid from solid, and A5 is to wash
Liquid storage tank is washed, A6 is the second equipment for separating liquid from solid, and B11 is flash distillation plant.
In the present invention, the fluid mix conveying appliance is equipped with coal dust import, lye import and suspension outlet,
Pressurized delivered after capable of mixing coal dust with lye, the alkaline suspension liquid after being pressurizeed.In the present invention, the coal dust
Import is used to coal dust being delivered to the fluid mix conveying appliance；The lye import is used to lye being delivered to the fluid
Mix conveying appliance；The suspension outlet is for the alkaline suspension liquid in the fluid mix conveying appliance to be discharged.
The utility model is not particularly limited the type of the coal dust and source, and use is well known to those skilled in the art
Scala media coal or high-order coal.In the present invention, the ash content of the coal dust is preferably 2%~15；Ash content is lower, to it
Processing cost is lower.In the present invention, the grain size of the coal dust is more excellent preferably smaller than equal to 1mm and more than or equal to 20 μm
It is selected as being less than or equal to 0.5mm and is more than or equal to 20 μm；Although coal particle size is small, is conducive to the removing of ash content, works as Pulverized Coal
When diameter is less than 20 μm, it can cause to be separated by solid-liquid separation difficult.
In the present invention, the lye is preferably sodium hydroxide solution；The concentration of the sodium hydroxide solution is preferred
It is 6%~20%, more preferably 13%~15%.In the present invention, the mass ratio of the coal dust and lye is preferably 1：
(2~10), more preferably 1：(2.8~3.4).
In the present invention, the subsection heating device be equipped with cold material import, material outlet, thermal material import and
Cold material exports；The cold material import is connected with suspension outlet；The material outlet and the thermostat
Feed inlet is connected.In the present invention, the subsection heating device is preferably made of the N number of heat-exchanger rig being sequentially connected, often
A heat-exchanger rig is equipped with cold material import, material outlet, thermal material import and cold material outlet；Wherein 2≤N≤20.
In the utility model, the cold material import of the 1st heat-exchanger rig is connected with suspension outlet, the heat of n-th heat-exchanger rig
Material outlet is connected with the feed inlet of the thermostat, along the material outlet and phase of the previous heat-exchanger rig of flow direction of material
The cold material import of adjacent the latter heat-exchanger rig is connected.Subsection heating device is excellent described in the utility model preferred embodiment
Choosing is made of 9 heat-exchanger rigs being sequentially connected.
In the present invention, the thermostat preferably reacts constent temperature heater, for being by temperature of charge control
Clear up reaction temperature.In the present invention, the thermostat is equipped with inlet port and outlet port；The charging of the thermostat
Mouth by the material after heat stepwise for being delivered to the thermostat；The discharge port of the thermostat is used for will be after constant temperature
Material is discharged.
In the present invention, the resolution reaction unit is equipped with inlet port and outlet port；The resolution reaction unit
Feed inlet is used to the material after constant temperature being delivered to the resolution reaction unit；The discharge port of the resolution reaction unit is used for will
Material discharge after resolution reaction.In the present invention, the resolution reaction unit is preferably anti-by M resolution being sequentially connected
Device is answered to form, each reactor of clearing up is equipped with inlet port and outlet port；Wherein 1≤M≤5.It is preferably real in the utility model
Apply cleared up described in example reaction unit preferably by be sequentially connected 2 resolution reactor groups at.
In the present invention, the decompressor step by step is equipped with feed inlet, discharge port and heat outlet；It is described to subtract step by step
Material after the feed inlet of pressure device is used to react resolution is delivered to the decompressor step by step；The decompressor step by step
Discharge port is used to the material after depressurizing step by step being discharged.In the present invention, the heat outlet of the decompressor step by step is used
The hot gas generated in discharge step by step decompression process；The heat outlet of the decompressor step by step and the subsection heating device
Thermal material import be connected.In the present invention, multiple decompression tank groups of the decompressor step by step preferably by being sequentially connected
At each tank that depressurizes is equipped with feed inlet, discharge port and heat outlet.In the present invention, it is described decompression tank number with
The number of the heat-exchanger rig is equal；Along the heat outlet of n-th of decompression tank of flow direction of material and along the N-n+1 of flow direction of material
The thermal material import of a heat-exchanger rig is connected；Wherein 1≤n≤N.I.e. the heat outlet of each decompression tank is filled with each heat exchange
The thermal material import set inversely corresponds
In the present invention, the preferred vacuum tank of the pressure stabilizing exhaust device is used for control material pressure, and gas is discharged.
In the present invention, the pressure stabilizing exhaust device is equipped with feed inlet, discharge port and gas vent；The pressure stabilizing exhaust device
Feed inlet is used to the material after depressurizing step by step being delivered to the pressure stabilizing exhaust device；Voltage stabilizing for after being vented by the discharge port
Material discharge；The gas vent is for being discharged gas.
In the present invention, the discharge port of the pressure stabilizing exhaust device is solid with the first equipment for separating liquid from solid and second successively
Liquid separating apparatus is connected.In the present invention, first equipment for separating liquid from solid and the second equipment for separating liquid from solid were preferably
Filter；The utility model uses positive pressure or adding pressure type plate type pressure filter, to reduce foam generation；Meanwhile the utility model is preferred
Using the filter with flusher and solids cake compresses screeding device.In the present invention, first equipment for separating liquid from solid and
Cleaning solution import is equipped between second equipment for separating liquid from solid.In the present invention, first equipment for separating liquid from solid detaches
The recyclable recycling of high high alkali liquid arrived；The isolated recyclable recycling of condensate liquid of second equipment for separating liquid from solid.
In the present invention, the cleaning solution import is connected with the discharge port of the washing liquid storage tank.It is new in this practicality
In type, the washing liquid storage tank is equipped with feed inlet and discharge port；The discharge port of the washing liquid storage tank is for being discharged cleaning solution；Institute
The feed inlet for stating washing liquid storage tank is used to cleaning solution being delivered to the washing liquid storage tank.In the present invention, the washing
Liquid storage tank is preferably condensate tank.
In the present invention, the flash distillation plant is preferably low-pressure flashing tank.In the present invention, the flash distillation dress
Feed inlet, discharge port and gas vent are installed.In the present invention, the feed inlet of the flash distillation plant adds with the segmentation
The cold material outlet of thermal is connected, i.e., the cold material outlet of each heat-exchanger rig is connected with the feed inlet of the flash distillation plant.
In the present invention, the condensate liquid discharge after the discharge port of the flash distillation plant is used to flash；The gas of the flash distillation plant
Body is exported for gas to be discharged.
The utility model additionally provides a kind of digestion procedure preparing ultra-clean coal, includes the following steps：
A) pressurized delivered after mixing coal dust with lye, the alkaline suspension liquid after being pressurizeed；
B) after the alkaline suspension liquid after the pressurization for obtaining step a) carries out heat stepwise, resolution reaction is carried out, is disappeared
Mixing suspension after solution reaction；
C) mixing suspension after reacting the resolution that step b) is obtained carries out after depressurizing step by step, carries out voltage stabilizing exhaust successively
It is separated by solid-liquid separation with first time, obtained solid filter cake is mixed with cleaning solution, washed, the coal slurry after being washed；It is described by
The hot gas generated in grade decompression process is used to provide heat source for the heat stepwise process in step b)；The cleaning solution by it is above-mentioned by
It is obtained after the cold material flash distillation obtained after the segmented heating process heat exchange of hot gas generated in grade decompression process；
D) coal slurry after the washing for obtaining step c) carries out second of separation of solid and liquid, obtains resolution coal sample.
Pressurized delivered after the utility model first mixes coal dust with lye, the alkaline suspension liquid after being pressurizeed.This reality
It is not particularly limited with the novel type to the coal dust and source, using scala media coal well known to those skilled in the art or high-order
Coal.In the present invention, the ash content of the coal dust is preferably 2%~15；Ash content is lower, lower to its processing cost.
In the present invention, the grain size of the coal dust is more preferably less than equal to preferably smaller than equal to 1mm and more than or equal to 20 μm
0.5mm and be more than or equal to 20 μm；Although coal particle size is small, be conducive to the removing of ash content, when coal particle size is less than 20 μm,
It can cause to be separated by solid-liquid separation difficult.
In the present invention, the lye is preferably sodium hydroxide solution；The concentration of the sodium hydroxide solution is preferred
It is 6%~20%, more preferably 13%~15%.In the present invention, the mass ratio of the coal dust and lye is preferably 1：
(2~10), more preferably 1：(2.8~3.4).
In the present invention, the pressure of the pressurized delivered is preferably 20bar~40bar, more preferably 30bar；Institute
The temperature for stating pressurized delivered is preferably 60 DEG C~70 DEG C, more preferably 66.8 DEG C；The flow velocity of the pressurized delivered is preferably
100kg/h~150kg/h, more preferably 125.75kg/h.
After obtaining the alkaline suspension liquid after the pressurization, the utility model carries out the alkaline suspension liquid after obtained pressurization
After heat stepwise, resolution reaction is carried out, obtains the mixing suspension after resolution reaction.In the present invention, the segmentation adds
The segmentation number of heat is preferably 2 times~20 times, more preferably 9 times.The utility model improves material by the way of heat stepwise
Temperature, to make temperature of charge reach resolution reaction temperature.The utility model is by necessary thermostat by temperature of charge control
It is made as resolution reaction temperature.
In the present invention, the temperature of the resolution reaction is preferably 220 DEG C~240 DEG C, more preferably 238 DEG C；Institute
The residence time for stating resolution reaction is preferably 15min~30min, more preferably 20min.The utility model preferably use repeatedly into
Row resolution reaction, is conducive to the progress of resolution reaction.In the present invention, the number that resolution reaction is repeated is preferred
For 1 time~5 times, more preferably 2 times.
After obtaining the mixing suspension after the resolution reaction, the utility model hangs the mixing after obtained resolution reaction
Supernatant liquid carries out after depressurizing step by step, carries out voltage stabilizing exhaust successively and is separated by solid-liquid separation for the first time, obtained solid filter cake is mixed with cleaning solution
It closes, is washed, the coal slurry after being washed.In the present invention, the hot gas generated in the decompression process step by step is used for
Heat source is provided for the heat stepwise process in step b)；The number depressurized step by step is preferably secondary with the segmentation of the heat stepwise
Number is identical.While the utility model reduces material pressure by the way of depressurizing step by step, the hot gas for depressurizing generation step by step is utilized
Heat stepwise is carried out, energy consumption is significantly reduced；Parameter by controlling decompression processes at different levels can reach to resolution heating constant temperature mistake
The stabilization of journey accurately controls.
In the present invention, the material pressure after the voltage stabilizing exhaust is preferably 0.1bar~0.5bar, more preferably
0.28bar；Preferably 70 DEG C~90 DEG C, more preferably 78 DEG C of temperature after the voltage stabilizing exhaust.
In the present invention, the recyclable recycling of high high alkali liquid that the first time is separated by solid-liquid separation；What is obtained consolidates
Body filter cake is mixed with cleaning solution, is washed, the coal slurry after being washed.In the present invention, the cleaning solution is by above-mentioned
It is obtained after the cold material flash distillation obtained after the segmented heating process heat exchange of hot gas generated in decompression process step by step.It is new in this practicality
In type, the cleaning solution is preferably condensate liquid.Cold material flash distillation after heat exchange is reused in washing by the utility model；It fills simultaneously
Divide and recycle discharging any waste liquor, low energy consumption, outer to make the digestion procedure provided by the utility model for preparing ultra-clean coal have
The small feature of waste discharge liquid measure.
After obtaining the coal slurry after the washing, the coal slurry after obtained washing is carried out second of solid-liquid point by the utility model
From, obtain resolution coal sample.In the present invention, described to be separated by solid-liquid separation the obtained recyclable recycling of condensate liquid for the second time.
The utility model provides a kind of digestion system and method preparing ultra-clean coal, and the digestion system includes：Stream
Body mix conveying appliance；The fluid mix conveying appliance is equipped with coal dust import, lye import and suspension outlet；Cold material into
Mouth exports the subsection heating device being connected with the suspension；The subsection heating device be equipped with material outlet, thermal material into
Mouth and cold material outlet；The thermostat that feed inlet is connected with the material outlet of the subsection heating device；Feed inlet and institute
State the connected resolution reaction unit of the discharge port of thermostat；Feed inlet with it is described resolution reaction unit discharge port be connected by
Grade decompressor；The heat outlet of the decompressor step by step is connected with the thermal material import of the subsection heating device；Charging
The pressure stabilizing exhaust device that mouth is connected with the discharge port of the decompressor step by step；Successively with the discharge port of the pressure stabilizing exhaust device
Connected the first equipment for separating liquid from solid and the second equipment for separating liquid from solid；First equipment for separating liquid from solid and second is separated by solid-liquid separation dress
Cleaning solution import is equipped between setting；The washing liquid storage tank that discharge port is connected with the cleaning solution import；Discharge port and the washing
The connected flash distillation plant of the feed inlet of liquid storage tank；The feed inlet of the flash distillation plant and the cold material of the subsection heating device go out
Mouth is connected.Compared with prior art, the digestion system provided by the utility model for preparing ultra-clean coal and method utilize subtracts step by step
The hot gas that pressure generates carries out heat stepwise, and the cold material flash distillation after heat exchange is reused in washing；Fully recycling is sharp simultaneously
With discharging any waste liquor, to make the digestion system provided by the utility model for preparing ultra-clean coal and method have, low energy consumption, outer row
The small feature of waste liquid amount.The experimental results showed that digestion system provided by the utility model and method are suitable for industrial applications.
The stabilization of resolution heating thermostatic process is accurately controlled in addition, can be reached by the parameter of control decompression processes at different levels
System, to be conducive to the progress of digestion process while saving energy consumption, so as to get resolution coal sample be further prepared
Ultra-clean coal has lower ash content.
In order to further illustrate the utility model, it is described in detail below by following embodiment.The utility model with
Coal dust used in lower embodiment is Xinglongzhuang coal, and basic coal quality and ash content ingredient are as shown in table 1.
The basic coal quality and ash content compositional data of Xinglongzhuang coal used in 1 the utility model embodiment of table
| Coal | Moisture Mad% | Ash content Aad% | Volatile matter Vdaf% | Fixed carbon Fcdaf% |
| Xinglongzhuang coal | 3.32 | 8.00 | - | - |
| Al2O3% | SiO2% | Fe2O3% | CaO% | MgO% |
| 34.66 | 40.54 | 4.86 | 6.87 | 2.57 |
Embodiment 1
Referring to Fig. 1, Fig. 1 is the structural representation of the digestion system for the preparation ultra-clean coal that the utility model embodiment provides
Figure.Wherein, A1 is fluid mix conveying appliance, and B1~B9 is heat-exchanger rig, and B10 is reaction constent temperature heater, and A2~A3 is equal
To clear up reactor, B12~B20 is decompression tank, and B21 is vacuum tank, and A4 is the first filter, and A5 is condensate tank, A6
For the second filter, B11 is low-pressure flashing tank.
The course of work of digestion system for the preparation ultra-clean coal that embodiment 1 provides is specially：
(1) coal dust S17 and lye S13 are mixed to form alkaline suspension liquid, then pressurized conveying in A1, after obtaining pressurization
Alkaline suspension liquid S14；Boost in pressure is not boiled with maintaining under the conditions of highest clears up reaction temperature, and S14 pressure is 30bar,
Temperature is 66.8 DEG C, flow velocity 125.75kg/h.
(2) S14 passes sequentially through B1~B9, and heat stepwise heating obtains the alkaline suspension liquid S9 after waste-heat；When continuous
After stable, go out each heat-exchanger rig temperature of charge be followed successively by 79 DEG C (S1), 92 DEG C (S2), 105 DEG C (S3), 125 DEG C
(S4)、133℃(S5)、148℃(S6)、164℃(S7)、181℃(S8)、198℃(S9)；Each heat-exchanger rig comprehensively utilizes energy consumption
It is followed successively by 174.4KW (B1), 180.6KW (B2), 188.3KW (B3), 197.3KW (B4), 208.2KW (B5), 220.7KW
(B6)、236.2KW(B7)、255.5KW(B8)、280KW(B9)。
Through measuring and calculating, technical process cooling again after relatively conventional laboratory experiment single heating, saving heat energy 1941.2KW,
Conversion is 6.17KW/ (kg coals), while having saved a large amount of cold.
(3) S9 enters B10, after being warming up to 238 DEG C of reaction temperature (S10), one timing of isothermal reaction in A2 and A1 successively
Between, obtain the mixing suspension S15 after resolution reaction；In the process, coal ore etc. occurs to clear up and react with alkali, and part is molten
In solution to lye, dissolved out from coal；The A2 residence times are 15min, and the A3 residence times are 5min, and reaction time mainly controls
The material of S15 forms, and sodalite (can remove substance) quality through calculating in S15 is the 1.48% of gross mass.
(4) S15 passes sequentially through B12~B20, depressurizes step by step, is often depressurized through level-one, and suspension is concentrated, and is concentrated
Suspension S32 afterwards；Wherein gasifying section inversely enters B1~B9 and is used to heat the alkaline suspension liquid after pressurization；Go out each decompression tank
Temperature of charge and pressure be followed successively by 222 DEG C, 21bar (S12), 206 DEG C, 15bar (S18), 190 DEG C, 11bar (S20), 174
DEG C, 7bar (S22), 158 DEG C, 5bar (S24), 142 DEG C, 3bar (S26), 126 DEG C, 2bar (S28), 110 DEG C, 1bar (S30),
94℃、0.56bar(S32)。
(5) S32 enters B21, and simultaneously gas S35 is discharged in steady pressure, obtains the suspension S34 after voltage stabilizing exhaust；Exhaust pressure
Power is 0.28bar；Material outlet temperature 78 DEG C (S34).
(6) S34 enters A4 and is separated by solid-liquid separation, the high high alkali liquid S48 recyclings isolated, solid filter cake S47 into
Enter subsequent processing；Wherein, the ratio that liquid enters liquid phase is 89.8%wt, and the ratio that liquid phase enters solid phase is 30.1%wt.
(7) S47 is mixed with the condensate liquid S49 in A5, is washed, the coal slurry S50 after being washed；Mixing temperature is not high
In gas phase bubbles temperature, S49 is 92.4 DEG C (S50) with the mixed materials of S47；It is mixed with 2124.37kg/h water that S50 enters back into A6
It closes, is separated by solid-liquid separation after 80 DEG C of washings of constant temperature, the condensate liquid S52 recyclings more than needed isolated, solid is resolution coal sample
S51；Wherein, the ratio that liquid enters liquid phase is 68.8%wt, and the ratio that liquid phase enters solid phase is 29.9%wt.
Meanwhile gas-liquid mixture S36~S44 after B1~B9 heat exchange converges to B11, and gas-liquid two-phase is detached after flash distillation,
Liquid phase S45 enters A5, and gas phase S46 enters the recovery processing of tail gas condensing system.
Comparative example
The resolution technique of laboratory stage in the prior art：
Coal dust 309g, water 735g, sodium hydroxide 156g are mixed evenly in beaker, obtain coal-alkali mixed liquor；So
Obtained coal-alkali mixed liquor is moved into autoclave afterwards, is heated to 240 DEG C from room temperature with the speed of 2 DEG C/min, constant temperature
After 20min, 90 DEG C are cooled to the speed of 4 DEG C/min, filtrate is removed by vacuum filtration, filter cake is roused in 50 DEG C of drying boxes
Dry 6h is air-dried, resolution treated Xinglongzhuang coal sample is obtained.
Calculate the resolution technique for the laboratory stage in the prior art that comparative example provides in the amplified energy consumption in laboratory and
Discharging any waste liquor amount is compared with the relevant art effect of the resolution technique of the offer of the utility model embodiment 1, the results showed that,
The digestion system that the utility model embodiment 1 provides compared to comparative example can energy saving 74%, while the outer discharge capacity of waste water reduces by 30%,
With preferable economy, it is suitable for industrial applications.
In addition, being carried respectively to the resolution coal sample and comparative example of the offer of embodiment 1 using identical preparation ultra-clean coal technique
That treated is prepared by Xinglongzhuang coal sample for the resolution of confession, and detailed process is as follows：
Acid of the coal sample with 65 DEG C of 847.2kg/h will be cleared up and carry out hybrid reaction, residence time 1h, and filtered at 75 DEG C；
Filter cake is mixed with 353kg/h water, then with 632kg/h lye hybrid reactions, residence time 1h, and at 75 DEG C filter；Filter cake is again
It is mixed, residence time 15min, is filtered under room temperature, liquid enters liquid with 65 DEG C of cycle acid solutions of 847.2kg/h
The ratio of phase is 91.9%wt, and the ratio that liquid phase enters solid phase is 25.0%wt, after filter cake is mixed with 2124.37kg/h water, often
Warm temperature filtration obtains ultra-clean coal.
After testing, treated that ultra-clean coal ash that Xinglongzhuang coal sample obtains is divided into for the resolution that Patent Reference's example provides
1.24%ad；And the ultra-clean coal ash that the resolution coal sample that the utility model embodiment 1 provides obtains is divided into 0.89%ad.
The above description of the disclosed embodiments enables professional and technical personnel in the field to realize or use this practicality new
Type.Various modifications to these embodiments will be apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest range consistent with features of novelty.
Claims (5)
1. a kind of digestion system preparing ultra-clean coal, which is characterized in that including：
Fluid mix conveying appliance；The fluid mix conveying appliance is equipped with coal dust import, lye import and suspension outlet；
Cold material import exports the subsection heating device being connected with the suspension；The subsection heating device goes out equipped with thermal material
Mouth, thermal material import and cold material outlet；
The thermostat that feed inlet is connected with the material outlet of the subsection heating device；
The resolution reaction unit that feed inlet is connected with the discharge port of the thermostat；
The decompressor step by step that feed inlet is connected with the discharge port of the resolution reaction unit；The hot gas of the decompressor step by step
Outlet is connected with the thermal material import of the subsection heating device；
The pressure stabilizing exhaust device that feed inlet is connected with the discharge port of the decompressor step by step；
The first equipment for separating liquid from solid and the second equipment for separating liquid from solid being connected successively with the discharge port of the pressure stabilizing exhaust device；Institute
It states and is equipped with cleaning solution import between the first equipment for separating liquid from solid and the second equipment for separating liquid from solid；
The washing liquid storage tank that discharge port is connected with the cleaning solution import；
The flash distillation plant that discharge port is connected with the feed inlet of the washing liquid storage tank；The feed inlet of the flash distillation plant with described point
The cold material outlet of section heating device is connected.
2. digestion system according to claim 1, which is characterized in that the subsection heating device N number of is changed by what is be sequentially connected
Thermal forms；Wherein 2≤N≤20；
The outlet of the cold material import of 1st heat-exchanger rig and the suspension is connected, the material outlet of n-th heat-exchanger rig and
The feed inlet of the thermostat is connected, and the material outlet along the previous heat-exchanger rig of flow direction of material is changed with adjacent the latter
The cold material import of thermal is connected.
3. digestion system according to claim 1, which is characterized in that the resolution reaction unit is disappeared by M be sequentially connected
Solve reactor group at；Wherein 1≤M≤5.
4. digestion system according to claim 2, which is characterized in that the decompressor step by step multiple is subtracted by what is be sequentially connected
Press tank composition；The number of the decompression tank is equal with the number of the heat-exchanger rig；
Along the thermal material of the heat outlet and the N-n+1 heat-exchanger rig along flow direction of material of n-th of decompression tank of flow direction of material
Import is connected；Wherein 1≤n≤N.
5. digestion system according to claim 2, which is characterized in that the outlet of the cold material of each heat-exchanger rig with the flash distillation
The feed inlet of device is connected.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107619694A (en) * | 2017-11-02 | 2018-01-23 | 兖矿集团有限公司 | A kind of digestion system and method for preparing ultra-clean coal |
| CN107619694B (en) * | 2017-11-02 | 2023-12-08 | 山东能源集团有限公司 | Digestion system and method for preparing ultra-clean coal |
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