CN109135837A - The wet process gasification process and system of a kind of water-coal-slurry or hydrocarbon slurry - Google Patents
The wet process gasification process and system of a kind of water-coal-slurry or hydrocarbon slurry Download PDFInfo
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- CN109135837A CN109135837A CN201811115223.7A CN201811115223A CN109135837A CN 109135837 A CN109135837 A CN 109135837A CN 201811115223 A CN201811115223 A CN 201811115223A CN 109135837 A CN109135837 A CN 109135837A
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- slurry
- coal
- gasification
- water
- carbon black
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0956—Air or oxygen enriched air
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0973—Water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1625—Integration of gasification processes with another plant or parts within the plant with solids treatment
- C10J2300/1628—Ash post-treatment
Abstract
The present invention discloses the wet process gasification process and system of a kind of water-coal-slurry or hydrocarbon slurry, the system comprises for in raw coal slurry and carbon black slurry flammable composition granule and non-flammable composition granule be effectively separated to obtain the separator of cleaned coal slurry, and for starching the cleaned coal gasification installation for carrying out gasification process and generating synthesis gas and carbon black slurry, the separator is connected to the gasification installation by pipeline.The invention enables all solid-state fossil energies with calorific value can be used for the wet feeding gasification similar to water-coal-slurry; the raw material source for coal water slurry entrained flow bed Coal Gasification Technology is expanded; keep gasification technology production synthesis gas cost more competitive; the flammable composition granule in carbon black slurry can be also effectively separated and be returned in the gasification installation by the present invention simultaneously continues gasification process; to promote the gasification efficiency of water-coal-slurry, a kind of engineering raw material of preciousness is alternatively arranged as after the non-flammable composition granule recycling for fields such as building materials, road and bridge, backfills.
Description
Technical field
The present invention relates to coal water slurry gasification fields more particularly to a kind of water-coal-slurry or the wet process of hydrocarbon slurry to gasify
Method and system.
Background technique
Coal will be the main foundation energy in China within following considerably long one period, and the utilization of coal is compared to natural
More difficult for gas and petroleum, pollution is also bigger.In fact, not only utilization rate is low for the coal resources in China at present, and exploit
During utilization, the pollution for being difficult to ignore is produced to environment.In order to safeguard national energy security and response environment protection, section
Energy emission reduction, clean and effective are the inevitable requirements utilized to coal resources.It is clear as coal to realize Coal Industry Sustainable Development
The clean important means utilized, Coal Gasification Technology have obtained great attention and development.
In traditional coal gasifying process, the difference of the raw material according to used in gasification furnace, be divided into dry powder coal gasification technique and
Water-coal-slurry coal gasifying process, the former, which is directly entered in gasification furnace with the dry coal dust of compressed gas carrying, gasifies, the latter Ze Tong
Coal dust is mixed into after water-coal-slurry with water often and is gasified into gasification furnace.Due to wet gas chemical industry skill feed continuity,
It is better than dry powder coal gasification technique in terms of stability, cost, therefore wet gas chemical industry skill industrially has more application prospect, it is real
Coal water slurry gasification has been obtained comparing and has been widely applied on border.
Current business wet gas furnace has strict requirements to raw material water-coal-slurry, such as requires ensuring water-coal-slurry
Its solid content is as high as possible to ensure high heating value and high gasification efficiency in the case where flow stability；Water coal is also required simultaneously
Ash content in slurry is as low as possible, to reduce the lime-ash of high temperature gas flow entrainment in gasification furnace to the refractory brick for constituting gasification furnace furnace wall
Wash away erosion because the oxide of the metals such as iron, calcium, magnesium in ash content can penetrate into concurrent biochemical reaction inside refractory brick,
Lead to refractory brick internal defect, intensity decline causes refractory brick to deteriorate.
Leading to current coal gasification industrially to the above-mentioned strict demand of water-coal-slurry can only use fat coal as preparation water-coal-slurry
Raw material, wherein the index of the fat coal is as follows: calorific value be higher than 4500 kcal/kg, content of ashes be lower than 20wt%.It is existing
Coal slurry gasifier can not working process colm, largely limit the application range of coal-water slurry gasification.Meanwhile
The yield of fat coal reduces increasingly and higher cost, and has a large amount of colm to be unable to get in addition to being used as family in coal mine
Effective utilization except fuel.Colm generally at least has one of following characteristics: content of ashes is high, it is low to fix carbon content,
High, the grey softening temperature of ashless dry base volatile matter content is relatively low, and it is high that when burning generates larger flue dust, easy coking, gangue content,
Calorific value low (calorific value is usually less than 4500 kcal/kg), etc..For the sake of unification, colm is defined as in the present invention
The coal of the minerals impurity of combustible comprising carbon containing-hydrogen and at least 20wt%.For example, colm can be coal, coal slime in washing
Or gangue.
Therefore, the technology of qualified water-coal-slurry can be prepared using colm as raw material there is an urgent need in the art to one kind,
But the characteristics of colm is that minerals impurity content is high (generally greater than 20wt%, such as 25-45wt%), and calorific value is low, direct powder
It is not used to prepare qualified water-coal-slurry after broken to supply existing gasification furnace.Necessary purification processes must be carried out to colm
The combustible of carbon containing-hydrogen therein to be sufficiently separated with minerals, be possible to prepare high-quality water coal by raw material of colm
Slurry.
In addition, carbon black (fine slag) filter cake is the by-product of coal gasification, main component is the mineral such as silica and aluminium oxide
Matter (non-flammable object), a little residual carbon (combustible) are obtained by coal gasification apparatus carbon black water through technical process such as sedimentation-filters pressings.
The remaining combustible content of carbon black filter cake fluctuates very with the variation of gasification furnace type, gasification process, gasified raw material operating condition etc.
Greatly, combustible content is generally in 10-30wt.%, and when gasification condition is severe, combustible content is up to 60wt.%.
The processing mode of the carbon black part filter cake mainly has for building product at present, bakes bricks, and as boiler oil and fills out
Four kinds are buried, but these four processing modes all have very big drawback.
If being directly used in building materials, building work, road and stemming operation, key constraints are solid combustible object amount, by
In the special process operating characteristic of gasification installation system, the carbon residue of institute's By-product carbon black filter cake is far more than national standard and associated row
Industry standard limited value even if also reducing the utility value of coal as boiler oil, while needing to increase boiler smoke processing
Mating Environmental Inputs.
With the proposition and implementation of national new environmental law, each place is constantly reinforced the efforts of investigation and prosecution of contaminating enterprises, is not inconsistent
The brick field of cyclization guaranteed request progressively closes off, and carbon black filter cake is caused nowhere to sell, and is used as landfill yard material, and uses Automobile Transportation
To outside factory, secondary pollution will cause, while the processing means filled discard combustible in carbon black, thermal energy can not discharge, and make
It cannot be efficiently used at resource.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
In view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of water-coal-slurry or hydrocarbon slurries
Wet process gasification process and system, it is intended to solve existing coal-water slurry gasification can not working process colm, limit water coal
Starch gasification process application range and the prior art can not in carbon black water combustible and non-flammable object effectively divided
From leading to the carbon black wasting of resources and the lower problem of coal water slurry gasification efficiency.
Technical scheme is as follows:
The wet process gasification system of a kind of water-coal-slurry or hydrocarbon slurry, wherein including for in raw coal slurry and carbon black slurry
Flammable composition granule and non-flammable composition granule be effectively separated to obtain the separator of cleaned coal slurry, and for the cleaned coal
Slurry carries out the gasification installation that gasification process generates synthesis gas and carbon black slurry；The separator and the gasification installation pass through pipeline
It is connected to, the cleaned coal slurry generated in the separator, which is pipelined in the gasification installation, carries out gasification process, described
The carbon black slurry generated in gasification installation, which is then pipelined in the separator, starches common progress separating treatment with raw coal.
The wet process gasification system of the water-coal-slurry or hydrocarbon slurry, wherein the separator includes being used for
It ground to obtain the first wet milk of mixing coal slurry to raw coal slurry and carbon black slurry, be connected to first wet milk and is used for pair
The mixing coal slurry is stirred the first agitator tank of mixing, and for flammable composition granule in the mixing coal slurry and non-
Flammable composition granule carries out the knockout tower of separating treatment, is disposed with inside the knockout tower and is connected to outside air from bottom to up
And generate the first distributor of microbubble, be connected to first agitator tank and be used to be passed through mixing coal slurry the second distributor with
And the third distributor for water spray.
The wet process gasification system of the water-coal-slurry or hydrocarbon slurry, wherein the knockout tower top and bottom
It is respectively arranged with combustible serum outlet and non-flammable object serum outlet, the combustible serum outlet is communicated with by pipeline
One filter press, the non-flammable object serum outlet are communicated with the second filter press by pipeline；First filter press passes through pipeline
It is connected to one second agitator tank, second agitator tank is starched reserve tank with a cleaned coal by pipeline and is connected to, the cleaned coal slurry storage
Slot is connected to by pipeline with the gasification installation.
The wet process gasification system of the water-coal-slurry or hydrocarbon slurry, wherein the separator further includes using
In carrying out broken the first crusher for generating coal dust, for carrying out broken generating the of fluxing agent powder to fluxing agent to raw coal
Sledging machine generates the second wet milk that fluxing agent is starched for carrying out grinding to the fluxing agent powder and defibrination water；Described
One crusher is connected to by pipeline with first wet milk, and second crusher is connected by pipeline and second wet milk
Logical, second wet milk is connected to by pipeline with second agitator tank.
The wet process gasification system of the water-coal-slurry or hydrocarbon slurry, wherein the gasification installation includes being used for
The gasification furnace for carrying out gasification process and generating crude synthesis gas and carbon black water is starched the cleaned coal, for carrying out to the crude synthesis gas
Washing generates the scrubbing tower of synthesis gas, for carrying out the vacuum flasher of flash distillation process to the carbon black water, for the carbon
Heisui River carries out solid-liquid separation treatment and obtains the subsider of carbon black slurry and buck, and the sedimentation trench bottom passes through pipeline and described first
Wet milk connection, the gasification furnace, scrubbing tower, vacuum flasher and subsider are sequentially communicated by pipeline.
The wet process gasification system of the water-coal-slurry or hydrocarbon slurry, wherein the gasification installation further includes setting
The Quench water pump between the gasification furnace and scrubbing tower is set, the subsider is by pipeline and one for storing the buck of buck
Case connection, the gray water tank be connected tos by pipeline with a grey water heater, the grey water heater pass through pipeline respectively with it is described
Vacuum flasher is connected to scrubbing tower.
A kind of wet process gasification process of water-coal-slurry or hydrocarbon slurry, wherein comprising steps of
By raw coal slurry be passed through separator and to the raw coal slurry in flammable composition granule and non-flammable composition granule separate
It is starched to cleaned coal；
Cleaned coal slurry is passed through in gasification installation by pipeline and carries out gasification process generation synthesis gas and carbon black slurry；
The carbon black slurry is passed into the separator and mixes generation mixing coal slurry, the Mixture Density Networks with raw coal slurry
Slurry obtains cleaned coal slurry by separating treatment, and the cleaned coal slurry is recycled into the gasification installation by pipeline to carry out at gasification
Reason generates synthesis gas.
The wet process gasification process of the water-coal-slurry or hydrocarbon slurry, wherein described to be passed through the carbon black slurry
Generation mixing coal slurry is mixed into the separator and with raw coal slurry, the mixing coal slurry obtains essence by separating treatment
The step of coal slurry, specifically includes:
Hydrophilic particle, collecting agent and surfactant are added into first wet milk and the mixing coal slurry is carried out
Milled processed；
Outside air is passed into the first distributor of knockout tower and generates microbubble, at the same from the second distributor of knockout tower and
Each lead into the mixing coal slurry and shower water in third distributor, the microbubble and the hydrophobicity combustible mixed in coal slurry
Particle, which combines, to float and forms cleaned coal slurry from upstream outflow knockout tower, and the hydrophily non-flammable composition granule in the mixing coal slurry is then
Sink and flows out knockout tower from underflow.
The wet process gasification process of the water-coal-slurry or hydrocarbon slurry, wherein the collecting agent is organic matter, institute
Stating hydrophilic particle includes but is not limited to aluminosilicate particle, and the granularity of the hydrophilic particle is 1-1000nm.
The wet process gasification process of the water-coal-slurry or hydrocarbon slurry, wherein the surfactant include but
It is not limited to pine tree alcohol oil, camphorated oil, phenolic acid mixed fatty alcohol, isomery hexanol, sec-octyl alcohol, pungent liquor-saturated alcohol, the liquor-saturated pure and mild lipid material of ether
One of or it is a variety of.
The utility model has the advantages that the wet process gasification system of water-coal-slurry provided by the invention or hydrocarbon slurry includes for original
Flammable composition granule and non-flammable composition granule in coal slurry and carbon black slurry are effectively separated to obtain the separator of cleaned coal slurry, and
For starching the cleaned coal gasification installation for carrying out gasification process and generating synthesis gas and carbon black slurry.There is heat the invention enables all
The solid-state fossil energy (including colm or gangue) of value can be used for gasifying similar to the wet feeding of water-coal-slurry, expand
For the raw material source of coal water slurry entrained flow bed Coal Gasification Technology, keep gasification technology production synthesis gas cost more competitive, simultaneously
Flammable composition granule in carbon black slurry can be also effectively separated and be returned in the gasification installation by the present invention continues gas
Change processing, to promote the gasification efficiency of water-coal-slurry, the non-flammable composition granule can also form filter cake by filters pressing, as one kind
Valuable engineering raw material is for fields such as building materials, road and bridge, backfills.
Detailed description of the invention
Fig. 1 is that the structure of the wet process gasification system preferred embodiment of a kind of water-coal-slurry of the present invention or hydrocarbon slurry is shown
It is intended to.
Fig. 2 is the structural schematic diagram of knockout tower preferred embodiment of the present invention.
Fig. 3 is the process of the wet process gasification process preferred embodiment of a kind of water-coal-slurry of the present invention or hydrocarbon slurry
Figure.
Specific embodiment
The present invention provides the wet process gasification process and system of a kind of water-coal-slurry or hydrocarbon slurry, of the invention to make
Purpose, technical solution and effect are clearer, clear, and the present invention is described in more detail below.It should be appreciated that this place is retouched
The specific embodiment stated is only used to explain the present invention, is not intended to limit the present invention.
Referring to Fig. 1, Fig. 1 be a kind of water-coal-slurry provided by the invention or hydrocarbon slurry wet process gasification system compared with
The structural schematic diagram of good embodiment, as shown, the wet process gasification system of the water-coal-slurry or hydrocarbon slurry includes using
In in raw coal slurry and carbon black slurry flammable composition granule and non-flammable composition granule be effectively separated to obtain the separation of cleaned coal slurry and fill
100 are set, and carries out gasification process generation synthesis gas (CO and H for starching the cleaned coal2) and carbon black slurry gasification installation
200；The separator 100 is connected to the gasification installation 200 by pipeline, the cleaned coal generated in the separator 100
Slurry, which is pipelined in the gasification installation 200, carries out gasification process, and the carbon black slurry generated in the gasification installation 200 is then
It is pipelined in the separator 100 and starches common progress separating treatment with raw coal.
Specifically, existing coal gas chemical industry has strict requirements to the quality of water-coal-slurry, and the prior art is merely able to
4500 kcal/kg and raw material of fat coal of the content of ashes lower than 20wt% as water-coal-slurry are higher than using calorific value, and for one
A little contents of ashes are more than that the colm of 20wt% can not then carry out gasification process, this largely limits coal water slurry gasification work
The application range of skill, and colm is made to be unable to get effective utilization.
Carbon black slurry is a kind of by-product that water-coal-slurry passes through that gasification process generates, and prior art is due to cannot achieve to carbon black
Flammable composition granule and non-flammable composition granule in slurry are effectively separated, therefore are directly carried out filters pressing processing to the carbon black slurry and generated
Carbon black filter cake, and by the carbon black filter cake be used for building product, bake bricks, fill or be used as boiler oil.Obviously, existing carbon black
Processing mode not only waste of resource is starched, but also reduces the gasification efficiency of water-coal-slurry, while also polluting environment.
Based on this, the wet process gasification system of water-coal-slurry provided by the invention or hydrocarbon slurry includes being connected by pipeline
Logical separator and gasification installation, by the separator in advance in coal slurry inferior and carbon black slurry flammable composition granule and
Non-flammable composition granule is separated, and the cleaned coal slurry formed by the combustible particle can be passed into the gasification installation by pipeline
In directly carry out gasification process.The present invention had not only extended the application range of coal-water slurry gasification, but also improved the gas of water-coal-slurry
Change efficiency, and the isolated non-flammable composition granule can form filter cake by filters pressing, the engineering as a kind of preciousness is former
Material is for fields such as building materials, road and bridge, backfills.
As a wherein embodiment, as depicted in figs. 1 and 2, the separator 100 includes for carrying out brokenly to raw coal
Broken the first crusher 10 for generating coal dust is connected to first crusher and is used to grind to raw coal slurry and carbon black slurry
To the first wet milk 11 of mixing coal slurry, it is connected to first wet milk and is used to be stirred mixing to the mixing coal slurry
The first agitator tank 12, be connected to first agitator tank and be used for it is described mixing coal slurry in flammable composition granule and non-flammable
The knockout tower 14 of composition granule progress separating treatment；Be disposed with from bottom to up inside the knockout tower 14 first distributor 141,
Second distributor 142 and third distributor 143, first distributor are connected to outside air, second distributor with
The first agitator tank connection, the third distributor can be connected to external source or internal recirculated water is connected to and is used to spray water.
Preferably, the first distributor inside the knockout tower, the second distributor and third distributor are to be provided with several through-holes
Tubulose or dendritic structure, the aperture of the through-hole can set according to the technological requirements, and the aperture is preferably 1-3cm.
The knockout tower top and bottom are respectively arranged with combustible serum outlet 144 and non-flammable object serum outlet 145,
The combustible serum outlet is communicated with the first filter press 16 by pipeline, and the non-flammable object serum outlet is connected to by pipeline
There is the second filter press 17；First filter press is connected to by pipeline with one second agitator tank 18, and second agitator tank passes through
Pipeline is connected to cleaned coal slurry reserve tank 19, and the cleaned coal slurry reserve tank is connected to by pipeline with the gasification installation；Described
Two filter presses are connected to by pipeline with a buck reserve tank for storing buck, the buck reserve tank pass through pipeline with it is described
Third distributor connection inside knockout tower.
Further, the separator further includes breaking for carrying out the second of broken generation fluxing agent powder to fluxing agent
Broken machine 20 is connected to second crusher and is used to carry out the fluxing agent powder and defibrination water grinding generation fluxing agent slurry
The second wet milk 21, second wet milk 21 is connected to by pipeline with second agitator tank 18.Preferably, described fluxing
Agent is one of calcium carbonate, white lime, calcium oxide, iron oxide and quartz sand or a variety of, but not limited to this.It is highly preferred that institute
It states and is also added into additive in fluxing agent slurry, the additive is inorganic salts and macromolecular organic compound, preferably polypropylene
Amide flocculant, carboxymethyl cellulose, the molecule of the additive may act on the interface of coal grain and water, can reduce water-coal-slurry stream
Interior friction when dynamic reduces viscosity, improves the dispersion of coal grain in water, improves stability, the subsider bottoms of water-coal-slurry.
Specifically, the colm that existing wet gas chemical industry skill can not be more than 20wt% to content of ashes directly carries out gas
Change processing, this largely limits the application range of coal-water slurry gasification, and in existing gasification process, water-coal-slurry gas
By-product carbon black slurry after change directly enters filter press from sedimentation trench bottom, and the filter press carries out filters pressing processing to carbon black slurry,
Filter cake is obtained, the solid concentration percentage in the filter cake is 75-95wt.%, and the flammable composition granule accounting in the solid reaches
10-30wt.%, which results in the very big wastings of resources of carbon black slurry.And water-coal-slurry provided by the invention or hydrocarbon slurry
Wet process gasification system is increased on traditional coal-water-slurry gasification process process base to the combustible in raw coal slurry and carbon black slurry
The separator that grain and non-flammable composition granule are effectively separated, in the present invention, sedimentation of the carbon black slurry from gasification installation
Entering in separator in slot is more than that the raw coal inferior slurry of 20wt% is mixed to form and mixes coal slurry with the content of ashes, described
Separator is effectively separated the flammable composition granule and non-flammable composition granule that mix in coal slurry, the non-flammable object slurries warp
Filter press filter pressing is crossed into filter cake, solid concentration percentage is 75-95wt.% in the filter cake, the combustible hundred in the solid
Divide than being 5-10wt.%；And solid concentration percentage is 55-75wt.% in isolated combustible slurries, wherein the solid
Combustible percentage be 85-99wt.%, the combustible particle solution is formed after cleaned coal slurry back in the gasification installation
Cycle gasification is carried out, to promote the gasification efficiency of water-coal-slurry.
Due to effectively being dropped into ash impurities (non-flammable composition granule) content in the cleaned coal slurry in the gasification installation
Low, i.e., the grey quantity of slag of processing outlet is substantially reduced in the gasification furnace unit time, this makes lime-ash under the high temperature conditions to composition gas
The physics of the refractory brick of change furnace furnace wall washes away, chemical erosion degree declines, that is, reduces the operational load of lime-ash discharging system, because
This extends the cycle of operation of the gasification installation, increases the reliability of device, and can be realized gasification furnace does not have standby boiler
Configuration, reduces coal water slurry gasification cost.
More specifically, raw coal is added in the first crusher and carries out crushing-type into coal dust, institute in the separator
State coal dust enter in the first wet milk with defibrination water, micro- mine separate addn and the carbon black slurry one returned from gasification installation
It rises and is ground, form mixing coal slurry.Preferably, the mixing coal slurry makes to mix the solid particle in coal slurry after grinding
Less than 100 microns, the mixing coal slurry after grinding is entered in first agitator tank and is stirred evenly average grain diameter.
It, then will be extraneous empty when the mixing coal slurry stirred evenly enters the second distributor of knockout tower by pipeline
Gas is passed through in first distributor, and the air come out from first distributor forms microbubble in separation tower bottom, together
When be passed through shower water from the third distributor of knockout tower；In knockout tower, air water will be significantly greatly increased in the presence of the microbubble
The specific surface area of bubble in phase, the microbubble can adsorb hydrophobicity in mixing coal slurry from separation tower bottom floating-upward process
Flammable composition granule, and hydrophily non-flammable composition granule will not then float, and since non-flammable composition granule density ratio water is big,
The non-flammable composition granule pools bottom outflow knockout tower in knockout tower；The floating microbubble then carry flammable composition granule into
Enter upper collecting tank, upper outflow knockout tower is pooled in upper collecting tank.The non-flammable object slurries are directly entered the second pressure
Filters pressing is carried out in filter, obtained ash content filter cake outlet；And isolated combustible slurries then enter the progress of the first filter press
Filters pressing forms cleaned coal cake, and the cleaned coal cake, which enters to starch to be mixed with previously prepared fluxing agent in the second agitator tank, forms essence
Coal slurry, the cleaned coal slurry are starched in reserve tank by tube storage in the cleaned coal, and the cleaned coal slurry in the cleaned coal slurry holding vessel is then
It is recycled into the gasification installation by pipeline and carries out gasification process.
As a wherein embodiment, the gasification installation 200 includes carrying out gasification process life for starching the cleaned coal
At crude synthesis gas and the gasification furnace 22 of carbon black water, the gasification furnace bottom is connected to a lock hopper 23 by pipeline, and the lock hopper is just
Lower section is provided with the slag bath 24 for accepting pulp water, be connected to by pipeline with the gasification furnace and be used for the crude synthesis gas into
Row washing generates the scrubbing tower 25 of synthesis gas, is connected to by pipeline with the scrubbing tower and is used to flash the carbon black water
The vacuum flasher 26 of processing is connected to the vacuum flashing pot bottom by pipeline and is used to carry out solid-liquid to the carbon black water
Separating treatment obtains the subsider 27 of carbon black slurry and buck.
Further, the gasification installation further includes the Quench being arranged between the gasification furnace 22 and the scrubbing tower 25
Water pump 28, the subsider be connected tos by pipeline with a gray water tank 29 for storing buck, the gray water tank pass through pipeline and
One grey water heater 30 is connected to, and the ash water heater is by pipeline respectively and in the top of vacuum flasher and scrubbing tower
Top connection.
Specifically, after the cleaned coal slurry and oxygen that are prepared from separator enter in gasification furnace jointly, in gas
Change the partial oxidation reaction generation crude synthesis gas that cleaned coal slurry occurs in furnace and entered in scrubbing tower by pipeline, wherein the gas
Change the reactant of incomplete combustion and slag in furnace to enter lock hopper by pipeline and be drained into slag bath from the lock hopper, it is described
Incomplete combustion reactant and slag are separated into solid slag and carbon black water after treatment in slag bath, outside the solid slag
Row, and then part mixes carbon black water with the carbon black water from wash tower bottoms, is back in gasification furnace by the Quench water pump
Shock chamber, as the chilled water of the incomplete combustion reactant and slag, remaining carbon black water then enters the vacuum in downstream
In flash tank.
Further, the crude synthesis gas come out from gasification furnace shock chamber enters wash tower bottoms, in scrubbing tower
Synthesis gas is used as after the high pressure flash condensate liquid, preheated supplement fresh water and the preheated grey water washing that return through downstream
Discharger system；The main component of the crude synthesis gas is CO, H2And CO2Deng, containing solid particulate matters such as thick slag, fine ash,
The crude synthesis gas can remove solid particulate matter therein after scrubbing tower washs to get the synthesis gas is arrived.The vacuum
Carbon black water in flash tank and the carbon black part water from slag bath flash in the vacuum flasher, the carbon after flash distillation
Heisui River enters in the subsider from the bottom of vacuum flasher, and the carbon black water passes through further solid-liquid in subsider
Separation, clear buck then enters ash water tank, and the carbon black slurry for settling trench bottom then passes through pipeline and enters the separator
Separating treatment is carried out together with raw coal slurry.
Based on above system, the present invention also provides a kind of water-coal-slurry or the wet process gasification process of hydrocarbon slurry,
In, as shown in figure 3, comprising steps of
S10, by raw coal slurry be passed through separator and to the raw coal slurry in flammable composition granule and non-flammable composition granule divide
It is starched from cleaned coal is obtained；
S20, cleaned coal slurry is passed through by progress gasification process generation synthesis gas and carbon black slurry in gasification installation by pipeline；
S30, the carbon black slurry is passed into the separator and mixes generation mixing coal slurry with raw coal slurry, it is described mixed
It closes coal slurry and obtains cleaned coal slurry by separating treatment, the cleaned coal slurry is recycled into the gasification installation by pipeline carries out gas
Change processing and generates synthesis gas.
Specifically, when the gasification installation generates carbon black slurry and the carbon black slurry enters described first by pipeline
When mixing in wet milk with raw coal slurry, then hydrophilic particle, collecting agent and surface-active are added into first wet milk
Agent is simultaneously ground the mixing coal slurry formed by raw coal slurry and carbon black slurry by the first wet milk, preferably by the mixing
Solid particle in coal slurry is ground to average grain diameter less than 100 microns, for example, 10 microns, 30 microns, 50 microns, 70 microns, 90
Micron etc.；In the particle size range, the hydrocarbon flammable composition granule in the mixing coal slurry is with non-combustible mineral particle subsequent
It can be efficiently separated in knockout tower, and the microbubble diameter in knockout tower mixes coal slurry Solids Particle Diameter phase with described
When close, then subsequent separating effect is better.
The hydrophilic particle being added in first wet milk includes but is not limited to aluminosilicate particle, the hydrophily
The granularity of particle is 1-1000nm, and effect is the non-flammable composition granule surface that can be attached in mixing coal slurry, and will be fine
Non-flammable composition granule aggregation become bulky grain, convenient for being settled in later separation tower；It is added in first wet milk
Collecting agent is organic matter, preferably the alkyl dithiocarbonate of alkali metal, such as two sulphur of alkyl dithiocarbonic acids sodium or alkyl
For potassium carbonate etc., but not limited to this；The surfactant is the surface active molecules with hydrophilic radical and hydrophobic grouping, excellent
Be selected as pine tree alcohol oil, camphorated oil, phenolic acid mixed fatty alcohol, isomery hexanol, sec-octyl alcohol, pungent liquor-saturated alcohol, in the liquor-saturated pure and mild lipid material of ether
It is one or more, but not limited to this；The effect of the collecting agent and surfactant is the surface tension of reduction aqueous solution,
The air being filled in water is set to be easy to disperse at stablizing bubble.
It further, can also be to described first when the mixing coal slurry after grinding enters in first agitator tank
It is added pH regulator and flocculant in agitator tank, one in the preferred lime of the pH adjusting agent, sodium carbonate, sodium hydroxide and sulfuric acid
Kind is a variety of, but not limited to this, its role is to adjust the pH value of mixing coal slurry, to control particle surface characteristic, mixing
The action condition of coal slurry chemical composition and other various regulators, so as to improve the separating effect in knockout tower；The flocculation
Agent is preferably polyacrylamide or starch, its role is to make fine solid particle be gathered into bulky grain, to accelerate it in water
Sinking speed.
In the step S30, when the first distributor is passed through air and forms microbubble, then simultaneously from the of knockout tower
Mixing coal slurry and shower water after each leading into the grinding in two distributors and third distributor, the microbubble and Mixture Density Networks
The flammable composition granule of hydrophobicity in slurry, which combines, to float and flows out knockout tower from upstream, the hydrophily non-flammable in the mixing coal slurry
Composition granule, which then sinks, flows out knockout tower from underflow.
In conclusion the wet process gasification system of water-coal-slurry provided by the invention or hydrocarbon slurry includes for original
Flammable composition granule and non-flammable composition granule in coal slurry and carbon black slurry are effectively separated to obtain the separator of cleaned coal slurry, and
For starching the cleaned coal gasification installation for carrying out gasification process and generating synthesis gas and carbon black slurry.There is heat the invention enables all
The solid-state fossil energy (including colm or gangue) of value can be used for gasifying similar to the wet feeding of water-coal-slurry, expand
For the raw material source of coal water slurry entrained flow bed Coal Gasification Technology, keep gasification technology production synthesis gas cost more competitive, simultaneously
Flammable composition granule in carbon black slurry can be also effectively separated and be returned in the gasification installation by the present invention continues gas
Change processing, to promote the gasification efficiency of water-coal-slurry, the non-flammable composition granule can also form filter cake by filters pressing, as one kind
Valuable engineering raw material is for fields such as building materials, road and bridge, backfills.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (10)
1. the wet process gasification system of a kind of water-coal-slurry or hydrocarbon slurry, which is characterized in that including for raw coal slurry and
Flammable composition granule and non-flammable composition granule in carbon black slurry are effectively separated to obtain the separator of cleaned coal slurry, and for pair
The cleaned coal slurry carries out the gasification installation that gasification process generates synthesis gas and carbon black slurry；The separator and the gasification installation
It is connected to by pipeline, the cleaned coal slurry generated in the separator, which is pipelined in the gasification installation, to carry out at gasification
It manages, the carbon black slurry generated in the gasification installation is then pipelined in the separator is divided jointly with raw coal slurry
From processing.
2. the wet process gasification system of water-coal-slurry according to claim 1 or hydrocarbon slurry, which is characterized in that described
Separator include for raw coal slurry and carbon black slurry are ground to obtain the first wet milk of mixing coal slurry, with it is described first wet
Grinding machine is connected to and is used to be stirred the mixing coal slurry the first agitator tank of mixing, and for in the mixing coal slurry
Flammable composition granule and non-flammable composition granule carry out the knockout tower of separating treatment, set gradually inside the knockout tower from bottom to up
There is the first distributor that microbubble is connected to and generated with outside air, be connected to first agitator tank and be used to be passed through Mixture Density Networks
The second distributor starched and the third distributor for water spray.
3. the wet process gasification system of water-coal-slurry according to claim 2 or hydrocarbon slurry, which is characterized in that described
Knockout tower top and bottom are respectively arranged with combustible serum outlet and non-flammable object serum outlet, the combustible serum outlet
It is communicated with the first filter press by pipeline, the non-flammable object serum outlet is communicated with the second filter press by pipeline；Described
One filter press is connected to by pipeline with one second agitator tank, and second agitator tank is starched reserve tank by pipeline and a cleaned coal and connected
Logical, the cleaned coal slurry reserve tank is connected to by pipeline with the gasification installation.
4. the wet process gasification system of water-coal-slurry according to claim 3 or hydrocarbon slurry, which is characterized in that described
Separator further includes for carrying out broken the first crusher for generating coal dust, for carrying out broken generation to fluxing agent to raw coal
Second crusher of fluxing agent powder, for carrying out that grinding generates fluxing agent slurry to the fluxing agent powder and defibrination water
Two wet milks；First crusher be connected to by pipeline with first wet milk, second crusher pass through pipeline and
The second wet milk connection, second wet milk are connected to by pipeline with second agitator tank.
5. the wet process gasification system of water-coal-slurry according to claim 2 or hydrocarbon slurry, which is characterized in that described
Gasification installation include for starching the cleaned coal gasification furnace for carrying out gasification process and generating crude synthesis gas and carbon black water, for pair
The crude synthesis gas carries out the scrubbing tower that washing generates synthesis gas, for carrying out the vacuum flashing of flash distillation process to the carbon black water
Tank obtains the subsider of carbon black slurry and buck for carrying out solid-liquid separation treatment to the carbon black water, and the sedimentation trench bottom is logical
Piping is connected to first wet milk, and the gasification furnace, scrubbing tower, vacuum flasher and subsider pass through pipeline successively
Connection.
6. the wet process gasification system of water-coal-slurry according to claim 5 or hydrocarbon slurry, which is characterized in that described
Gasification installation further includes the Quench water pump being arranged between the gasification furnace and scrubbing tower, and the subsider is used by pipeline and one
In the gray water tank connection of storage buck, the gray water tank is connected to by pipeline with a grey water heater, and the ash water heater is logical
Piping is connected to the vacuum flasher and scrubbing tower respectively.
7. the wet process gasification process of a kind of water-coal-slurry or hydrocarbon slurry, which is characterized in that comprising steps of
By raw coal slurry be passed through separator and to the raw coal slurry in flammable composition granule and non-flammable composition granule separate
It is starched to cleaned coal；
Cleaned coal slurry is passed through in gasification installation by pipeline and carries out gasification process generation synthesis gas and carbon black slurry；
The carbon black slurry is passed into the separator and mixes generation mixing coal slurry, the Mixture Density Networks with raw coal slurry
Slurry obtains cleaned coal slurry by separating treatment, and the cleaned coal slurry is recycled into the gasification installation by pipeline to carry out at gasification
Reason generates synthesis gas.
8. according to water-coal-slurry described in claim requirement 7 or the wet process gasification process of hydrocarbon slurry, which is characterized in that
It is described that the carbon black slurry is passed into the separator and mixes generation mixing coal slurry, the Mixture Density Networks with raw coal slurry
The step of slurry obtains cleaned coal slurry by separating treatment specifically includes:
Hydrophilic particle, collecting agent and surfactant are added into first wet milk and the mixing coal slurry is carried out
Milled processed；
Outside air is passed into the first distributor of knockout tower and generates microbubble, at the same from the second distributor of knockout tower and
Each lead into the mixing coal slurry and shower water in third distributor, the microbubble and the hydrophobicity combustible mixed in coal slurry
Particle, which combines, to float and forms cleaned coal slurry from upstream outflow knockout tower, and the hydrophily non-flammable composition granule in the mixing coal slurry is then
Sink and flows out knockout tower from underflow.
9. the wet process gasification process of water-coal-slurry according to claim 8 or hydrocarbon slurry, which is characterized in that described
Collecting agent is organic matter, and the hydrophilic particle includes but is not limited to aluminosilicate particle, and the granularity of the hydrophilic particle is
1-1000nm。
10. the wet process gasification process of water-coal-slurry according to claim 8 or hydrocarbon slurry, which is characterized in that institute
State surfactant include but is not limited to pine tree alcohol oil, it is camphorated oil, phenolic acid mixed fatty alcohol, isomery hexanol, sec-octyl alcohol, pungent liquor-saturated
One of liquor-saturated pure and mild lipid material of alcohol, ether is a variety of.
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| CN101433883A (en) * | 2008-12-18 | 2009-05-20 | 天津大学 | Multilevel adverse current contact iron ore reverse flotation process and equipment |
| CN105293804A (en) * | 2015-11-01 | 2016-02-03 | 张晓峰 | Coal gasification ash water treatment method |
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| CN101433883A (en) * | 2008-12-18 | 2009-05-20 | 天津大学 | Multilevel adverse current contact iron ore reverse flotation process and equipment |
| CN105293804A (en) * | 2015-11-01 | 2016-02-03 | 张晓峰 | Coal gasification ash water treatment method |
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