CN110523309A - A method of the sedimentation method of modifying of waste, reforming system and high concentration slurry is prepared using modified product - Google Patents
A method of the sedimentation method of modifying of waste, reforming system and high concentration slurry is prepared using modified product Download PDFInfo
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- CN110523309A CN110523309A CN201910974395.8A CN201910974395A CN110523309A CN 110523309 A CN110523309 A CN 110523309A CN 201910974395 A CN201910974395 A CN 201910974395A CN 110523309 A CN110523309 A CN 110523309A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/70—Pre-treatment of the materials to be mixed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/04—Pressure vessels, e.g. autoclaves
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
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Abstract
The present invention provides a kind of method of modifying, reforming system and method for preparing high concentration slurry using modified product for settling waste, the method for modifying includes: to carry out hydro-thermal reaction, flocculant therein of degrading to sedimentation waste.The reforming system is used to carry out the method for modifying of the sedimentation waste；The reforming system includes sequentially connected feed unit and reaction member.The method for preparing high concentration slurry includes: that feed coal, modified material, water and additive are carried out wet process slurrying to obtain the high concentration slurry.It is modified by high temperature and pressure to settle waste, can effectively degrade the flocculant settled in waste, flocculant be reduced to the adverse effect of coal slurrying concentration, to achieve the purpose that prepare high concentration ground paste using sedimentation waste.
Description
Technical field
The invention belongs to pulping technique fields, are related to a kind of method for preparing high concentration slurry more particularly to a kind of sedimentation
Method of modifying, reforming system and the method for preparing high concentration slurry using modified product of waste.
Background technique
With the rapid development of industry, the quickening of population growth and urbanization process, the reinforcement of environmental requirement, sewage treatment
The raising of rate, the yield for settling waste are also increasing.While sedimentation waste production is continuously increased, China's sedimentation is useless
The processing technique and equipment of gurry but generally fall behind, and the coverage ratio for settling waste safe handling is very low, becomes current China face
The urgent problem to be solved faced.It such as deals with improperly or not in time, serious secondary pollution can be brought.
Sedimentation waste is mainly derived from the sludge of municipal administration and industrial enterprise's generation, the coal slime that coal washing generates, coal dust
Or the greasy filth generated in the waste residue and oil exploitation and transportational process of coal water slurry gasification process generation.Various sewage entrainments are hanged
Impurity such as floating object and in the difficult decomposed substance of microorganism and part that treatment process generates, refer to after the processing such as sedimentation post-processing
Reuse can finally be carried out by the processing of the follow-up systems such as sand coarse aggregate ratio, ultrafiltration by marking qualified sewage.But generated after sewage treatment
Solid waste, wherein contain a large amount of harmful substance, such as pathogenic microorganism, bacterium, synthesis of organic substance and heavy metal ion,
It is more intractable.
Sedimentation waste is made of various sewage or grease by sedimentation, filters pressing, and particle suspension is in sewage and content
Lower, flocculant, which is added, makes its loss of stability, and micelle object, which agglomerates, increases particle, forms floccule body, alumen ustum.Floccule body
Aqueous phase precipitation is detached from after growing up to certain volume under the effect of gravity, so that a large amount of suspended matters in waste water are removed, to reach
To the effect of water process.Due to the addition of flocculant, causes the viscosity for settling waste mixed system larger, made after being mixed with coal
The slurry concentration obtained is lower, if directly using sewage slurrying, sewage consumption is smaller, wastes water resource and is unable to satisfy improvement
Demand.Existing sedimentation Waste Disposal Technology mainly has burning and slurrying etc., and burning can generate a large amount of pernicious gases and endanger environment,
And be made after water-coal-slurry through high-temperature gasification, harmful substance can be converted to resource, but the prior art is generally by sedimentation
Waste and the direct slurrying of coal will settle the polyacrylamide degradation in waste by chemical method and thermally-denatured method
Slurrying afterwards, but these methods have the shortcomings that obtained coal-water fluid concentration is low, slurrying is at high cost and equipment investment is big.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide it is a kind of settle waste method of modifying,
Reforming system and the method for preparing high concentration slurry using modified product, sedimentation waste is modified by high temperature and pressure, can have
Flocculant in effect degradation sedimentation waste, reduces flocculant to the adverse effect of coal slurrying concentration, utilizes sedimentation to reach
Waste prepares the purpose of high concentration ground paste.
To achieve this purpose, the present invention adopts the following technical scheme:
In a first aspect, the present invention provides a kind of method of modifying for settling waste, the method for modifying includes:
Hydro-thermal reaction, flocculant therein of degrading are carried out to sedimentation waste.
In the present invention, by carrying out hydro-thermal reaction to sedimentation waste, hydrothermal degradation, drop are carried out to flocculant therein
The adverse effect that low flocculant generates the subsequent comprehensive utilization link of sedimentation waste, while also effectively preventing useless to sedimentation
Gurry such as is burned or is chemically treated at the environmental problem caused by modes.
Especially, it should be noted that it is useless that sedimentation waste refers in particular to the solid that certain class obtains after settlement treatment in the present invention
Gurry, such as may refer to: the municipal sludge or industrial sludge, coal generated in municipal wastewater processing or industrial processes is washed
The greasy filth for selecting the waste residue generated during the coal slime coal dust generated, coal water slurry gasification or being generated in oil exploitation and transportational process,
The above-mentioned all kinds of wastes enumerated are the sedimentation waste that the present invention limits after settlement treatment, i.e., mainly refer in particular to because at sedimentation
Reason leads to the solid waste in waste containing flocculant.In other words, it is a primary object of the present invention to the drops by low pollution
Solution mode removes the flocculant in sedimentation waste, and flocculant is avoided to have an adverse effect the comprehensive utilization of subsequent waste,
And other sediments for not including flocculant should not then be applicable in the technical solution that the present invention limits.
As a preferred technical solution of the present invention, the method for modifying specifically comprises the following steps:
(I) hydro-thermal reaction is carried out after sedimentation waste is preheated, flocculant therein of degrading obtains reaction product；
(II) reaction product carries out heat exchange with sedimentation waste when charging and realizes preheating described in step (I).
It is modified by high temperature and pressure to settle waste, can effectively degrade the flocculant settled in waste, widen sedimentation
The application range of waste and field is used, improves the comprehensive utilization ratio of sedimentation waste, such as can be used as high concentration slurry
Pulping raw material use, not only realize the harmless treatment and recycling and reusing of sedimentation waste, but also significantly reduce
Slurrying cost expands the range of slurrying raw material.
As a preferred technical solution of the present invention, sedimentation waste described in step (I) is sludge, coal slime, gasification
One of waste residue or greasy filth or at least two combination.
Preferably, the mass percent of the described sedimentation waste is 3~15wt%, for example, can be 3wt%, 4wt%,
5wt%, 6wt%, 7wt%, 8wt%, 9wt%, 10wt%, 11wt%, 12wt%, 13wt%, 14wt% or 15wt%, but simultaneously
It is not limited only to cited numerical value, other unlisted numerical value are equally applicable in the numberical range.
Preferably, the reaction temperature of the hydro-thermal reaction is 200~400 DEG C, such as can be 200 DEG C, 220 DEG C, 240
DEG C, 260 DEG C, 280 DEG C, 300 DEG C, 320 DEG C, 340 DEG C, 360 DEG C, 380 DEG C or 400 DEG C, it is not limited to cited numerical value,
Other unlisted numerical value are equally applicable in the numberical range.Temperature is unable to reach modified effect lower than 200 DEG C, and temperature is higher than
400 DEG C of one side cause waste of resource, on the one hand will lead to the volatilization of several components, and meeting equipment has a negative impact.
Preferably, the reaction pressure of the hydro-thermal reaction be 0.1~2MPa, such as can be 0.1MPa, 0.2MPa,
0.3MPa、0.4MPa、0.5MPa、0.6MPa、0.7MPa、0.8MPa、0.9MPa、1.0MPa、1.1MPa、1.2MPa、1.3MPa、
1.4MPa, 1.5MPa, 1.6MPa, 1.7MPa, 1.8MPa, 1.9MPa or 2.0MPa, it is not limited to cited numerical value, it should
Other unlisted numerical value are equally applicable in numberical range.Pressure is unable to reach modified effect lower than 0.1MPa, and pressure is higher than
On the one hand 2MPa causes waste of resource, on the other hand higher to equipment requirement, and the effect generated therewith is not obvious.
Second aspect, the present invention provides a kind of reforming systems for settling waste, and the reforming system is for carrying out
The method of modifying of waste is settled described in first aspect.
The reforming system includes sequentially connected feed unit and reaction member.
As a preferred technical solution of the present invention, the feed unit flows to packet according to the charging of sedimentation waste
Include sequentially connected material storage device and conveying device.
Preferably, any one of the conveying device in centrifugal pump, diaphragm pump, reciprocating pump or screw pump.
Preferably, the reaction member includes sequentially connected preheating device and reaction unit, and sedimentation waste is through pre-
Enter reaction unit after thermal preheating.
Preferably, the reaction unit discharge port is also connected with the heat exchange mouth of preheating device, the reaction of reaction unit discharge
Product returns to preheating device and preheats to sedimentation waste.
Preferably, the preheating device is double-tube heat exchanger or tubular heat exchanger.
As a preferred technical solution of the present invention, the company of the reaction unit discharge port and preheating device heat exchange mouth
Adapter tube road is additionally provided with attemperator, and the attemperator is for carrying out buffering heat preservation to reaction product.
In the present invention, attemperator is heat preservation remaining tank known in the field, and major function is to after reaction
Modification material carry out buffering heat preservation.
In the present invention, optional material storage device is material trough, and reaction unit is reaction kettle, is passed through into reaction kettle
Heat medium of the high-temperature steam as hydro-thermal reaction, conveying device will settle waste and be delivered to preheating device by material trough, pass through
After crossing preheating device preheating, high temperature and pressure being carried out into reaction kettle and is modified, high-temperature steam is passed through in reaction kettle to sedimentation waste
Processing is modified with flocculant therein of degrading, the warm device of modified product enters preheating device, useless with fresh sedimentation
Heat exchange occurs for gurry charging, realizes the preheating of sedimentation waste, the modified product discharge after heat exchange.
The third aspect, the present invention provides a kind of preparation methods of high concentration slurry, using sedimentation described in first aspect
The modification material that the method for modifying of waste is prepared prepares high concentration slurry.
The preparation method includes:
Feed coal, modified material, water and additive are subjected to wet process slurrying and obtain the high concentration slurry.
Wherein, the modification material is prepared using the method for modifying of sedimentation waste described in first aspect.
Invention especially provides a kind of application fields of modified sedimentation waste, using modified sedimentation waste and
Low-order coal compound abrasive slurrying fully utilizes the reactivity of sedimentation waste and the slurry performance of low-order coal, is prepared
The high concentration slurry of function admirable.Specifically:
On the one hand, sedimentation waste comes from municipal sludge, coal slime, coal dust or greasy filth, has a higher reactivity, but by
In wherein causing the viscosity for settling waste mixed system larger containing flocculant, paste-forming properties are poor, after mixing with pulping raw material
Obtained slurry concentration is lower, and the present invention is pyrolyzed flocculant by hydrothermal modification, reduces flocculant to slurrying concentration
The adverse effect of generation.On the other hand, specifically preferred according to the inventionly using low-order coal as feed coal slurrying, since low-order coal has
Have that calorific value is high, paste-forming properties are good and the advantages such as cheap, be usually used in using as pulping raw material, but presently, there are the problem of be,
The volatile matter of low-order coal is low, and reactivity is poor, it is difficult to which catch fire after-flame, hinders the application of low-order coal slurrying.The present invention passes through
By the two mixed pulp, respective advantage has been played.
As a preferred technical solution of the present invention, the preparation method specifically comprises the following steps:
(1) feed coal is divided into the first feed coal and the second feed coal after crushing, by the first feed coal, water, modified material
Wet process slurrying, which is carried out, with additive obtains modified slurry；
The modified slurry progress wet process slurrying that (2) second feed coals, water, additive and step (1) obtain obtains described
High concentration slurry.
Feed coal is divided into two-part purpose and is by the present invention, and a part of feed coal is surpassed after mixing with modified material
Fine grinding slurrying can further decrease the content of flocculating in sedimentation waste, reduce influence of the flocculant to slurry performance, thus
Achieve the purpose that improve sedimentation waste additive amount, reduce energy consumption and prepare high concentration slurry；Another part feed coal is main
For controlling the concentration of final finished slurry, since the paste-forming properties of modified material are poor, individually feed coal and modified material are mixed
It is lower to close the concentration of slurry that abrasive material is prepared, is unable to reach using standard, and additionally providing a part of feed coal again can adjust
The final output concentration of whole slurry.
As a preferred technical solution of the present invention, feed coal described in step (1) is low-order coal.
Preferably, the low-order coal includes one of jet coal, lignite, weathered coal or meager lean coal or at least two
Combination.
Preferably, the partial size of the feed coal after crushing be≤13mm, such as can be 1mm, 2mm, 3mm, 4mm,
6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm or 13mm.
It should be noted that in the present invention, shattering process carries out in crusher, limited optionally for the present invention
The crusher of shattering process includes but is not limited to jaw crusher, gyratory crusher, kibbler roll, vertical crusher machine, counterattack
Any one in formula crusher or compound crusher, the above-mentioned restriction to crusher type is not belonging to disclosure of the invention model
Enclose and protection scope, on the basis of guaranteeing crushing effect and Particle size requirements, disclose in the prior art or new technology in it is not public
The crusher of the disposable type or structure opened is used equally in the present invention.
Preferably, the feed coal is divided into the first feed coal and the second feed coal by quality after crushing.
Preferably, the mass ratio of first feed coal and the second feed coal is (1~3): (7~9), such as be can be
1:9,2:8 or 3:7.
Preferably, the mass ratio of the butt amount of first feed coal, modified material and additive is (10~30):
(0.1~10): (0.05~0.5), such as can be 10:0.1:0.05,10:5:0.05,10:10:0.05,10:0.1:0.1,
10:0.1:0.2,10:0.1:0.3,10:0.1:0.4,10:0.1:0.5,20:0.1:0.05 or 20:0.1:0.05, but simultaneously not only
It is limited to cited numerical value, other unlisted numerical value are equally applicable in the numberical range.
Preferably, the additive includes naphthalene sulfonic acid-formaldehyde condensation product, lignosulfonates, sulfonated humic acid salt, gathers
One of carboxylic serials or at least two combination, such as can be the group of naphthalene sulfonic acid-formaldehyde condensation product and lignosulfonates
It closes, is the combination of naphthalene sulfonic acid-formaldehyde condensation product and sulfonated humic acid salt, the combination of naphthalene sulfonic acid-formaldehyde condensation product and polycarboxylic-acid, wooden
The combination of plain sulfonate and sulfonated humic acid salt, the combination of lignosulfonates and polycarboxylic-acid or sulfonated humic acid salt and poly- carboxylic
Acid system, it is not limited to cited combination variety, other interior unlisted types of the combination are equally applicable.
Preferably, the wet process pulping process includes carrying out after the first feed coal, water, modified material and additive mix
Ultrafine Grinding slurrying obtains modified slurry.
Wherein, the modification material is prepared using following methods:
(a) hydro-thermal reaction is carried out after sedimentation waste is preheated, flocculant therein of degrading obtains reaction product；
(b) reaction product carries out heat exchange with sedimentation waste when charging and realizes preheating described in step (a), after heat exchange
The modification material is obtained after reaction product discharge；
In the present invention, after carrying out Ultrafine Grinding to sedimentation waste, facilitate the wadding settled in waste of further degrading
Solidifying agent, to reach additive amount, low energy consumption and the target for preparing high concentration slurry for improving sedimentation waste.
Preferably, the mass percent of the modified slurry is 15~38%, for example, can be 15%, 16%, 17%,
18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%,
33%, 34%, 35%, 36%, 37% or 38%, it is not limited to cited numerical value, interior other of the numberical range are not arranged
The numerical value of act is equally applicable.
Preferably, the average grain diameter of the modified slurry is 2~25 μm, such as can be 2 μm, 4 μm, 6 μm, 8 μm, 10
μm, 12 μm, 14 μm, 16 μm, 18 μm, 20 μm, 22 μm or 24 μm, it is not limited to cited numerical value, in the numberical range
Other unlisted numerical value are equally applicable.
As a preferred technical solution of the present invention, the butt amount of the second feed coal described in step (2), additive and
The mass ratio of the butt amount of modified slurry is (70~90): (0.05~1): (10.15~40.5), such as can be 70:0.05:
10.15、70:0.1:10.15、70:0.2:10.15、70:0.3:10.15、70:0.4:10.15、70:0.5:10.15、70:
0.6:10.15、70:0.7:10.15、70:0.8:10.15、70:0.9:10.15、80:0.05:10.15、70:0.05:20、70:
0.05:30 or 70:0.05:40, it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are same
It is applicable in.
Preferably, the additive includes one kind of lignosulfonates, humate or naphthalene sulfonic acid-formaldehyde condensation product
Or at least two combination, such as can be the combination of naphthalene sulfonic acid-formaldehyde condensation product and lignosulfonates, naphthalenesulfonateformaldehyde formaldehyde contracting
Close object and the combination of sulfonated humic acid salt, the combination of naphthalene sulfonic acid-formaldehyde condensation product and polycarboxylic-acid, lignosulfonates and sulfonation
The combination of humate, the combination of lignosulfonates and polycarboxylic-acid or sulfonated humic acid salt and polycarboxylic-acid, but simultaneously not only
It is limited to cited combination variety, other unlisted types are equally applicable in the combination.
Preferably, the wet process pulping process includes: that the second feed coal, water, additive and modified slurry mixing are laggard
Row rod milling slurrying obtains the high concentration slurry.
Preferably, the mass percent of the high concentration slurry is 58~65%, for example, can be 58%, 59%,
60%, 61%, 62%, 63%, 64% or 65%, it is not limited to cited numerical value, interior other of the numberical range are not arranged
The numerical value of act is equally applicable.
Preferably, the average grain diameter of the high concentration slurry is 70~150 μm, such as can be 70 μm, 80 μm, 90 μ
M, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm or 150 μm, it is not limited to cited numerical value, in the numberical range
Other unlisted numerical value are equally applicable.
Numberical range of the present invention not only includes enumerated point value, further includes the above-mentioned numerical value not included
Arbitrary point value between range, as space is limited and for concise consideration, range described in the present invention no longer exclusive list includes
Specific point value.
The system refers to device systems, apparatus system or process units.
Compared with prior art, the invention has the benefit that
(1) sedimentation waste is modified by high temperature and pressure, and can effectively degrade the flocculant settled in waste, and it is heavy to widen
It drops the application range of waste and uses field, improve the comprehensive utilization ratio of sedimentation waste；
(2) present invention reduces flocculant to slurrying by modification using modified sedimentation waste as pulping raw material
The adverse effect that performance generates improves the additive amount of sedimentation waste, reduces production cost and preparation high concentration to reach
The purpose of slurry.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the sedimentation waste reforming system that a specific embodiment of the invention provides；
Fig. 2 is the preparation technology flow chart for the high concentration slurry that a specific embodiment of the invention provides.
Wherein, 1- material trough；2- conveying device；3- preheating device；4- reaction kettle；5- attemperator.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
In a specific embodiment, the present invention provides a kind of sedimentation waste reforming system as shown in Figure 1, institutes
The reforming system stated includes sequentially connected feed unit and reaction member.
Wherein, feed unit includes sequentially connected material storage device and conveying according to the charging flow direction of sedimentation waste
Device；Reaction member includes sequentially connected preheating device and reaction unit, is entered after the preheated device preheating of sedimentation waste
Reaction unit；Reaction unit discharge port is also connected with the heat exchange mouth of preheating device, and the reaction product of reaction unit discharge returns to preheating
Device preheats sedimentation waste；Guarantor is additionally provided on the connecting line of reaction unit discharge port and preheating device heat exchange mouth
Warm device, the attemperator is for carrying out buffering heat preservation to reaction product.
In another embodiment, the present invention provides a kind of method of modifying for settling waste, described changes
Property method includes:
(I) heat medium of the high-temperature steam as hydro-thermal reaction is passed through into reaction kettle, conveying device will settle waste
Preheating device is delivered to by material trough, reaction kettle is entered after preheating device preheats, in reaction unit, high-temperature steam is to heavy
It drops waste and carries out hydrothermal modification treatment with flocculant therein of degrading；
(II) the warm device of modified product enters preheating device, and heat occurs with sedimentation waste when charging and exchanges,
Realize the preheating that waste is settled described in step (I), the modified product discharge after heat exchange.
In another embodiment, the present invention provides a kind of sides for preparing high concentration slurry as shown in Figure 2
Method, the preparation method include:
(1) feed coal is divided into the first feed coal and the second feed coal after crushing, by the first feed coal, water, modified material
Wet process slurrying, which is carried out, with additive obtains modified slurry；
Wherein, modified material is prepared using following methods:
(a) hydro-thermal reaction is carried out after sedimentation waste is preheated, flocculant therein of degrading obtains reaction product；
(b) reaction product carries out heat exchange with sedimentation waste when charging and realizes preheating described in step (b), after heat exchange
The modification material is obtained after reaction product discharge.
The modified slurry progress wet process slurrying that (2) second feed coals, water, additive and step (1) obtain obtains described
High concentration slurry.
Embodiment 1
A kind of method of modifying for settling waste is present embodiments provided, the method for modifying is mentioned in specific embodiment
It is carried out in the sedimentation waste reforming system of confession, the method for modifying specifically comprises the following steps:
(I) fine stuff (mass percent 3wt%) that storage is generated by coal water slurry gasification process in material trough starches fine ash
Slurry is sent into double-tube heat exchanger by centrifugal pump and is preheated, and fine stuff is passed through reaction kettle after being preheated to 55 DEG C, in a kettle
It carries out high temperature and pressure hydro-thermal reaction and hydrothermal degradation is carried out to flocculant therein, the reaction temperature of hydro-thermal reaction is 300 DEG C, reaction
Pressure is 0.8MPa；
(II) modified high-temperature fine mortar passes through the buffering insulation effect sleeve pipe heat exchanger of attemperator, in casing
Heat exchange occurs with fresh fine stuff charging in heat exchanger to preheat it, the temperature of the modification fine stuff after heat exchange is down to 70 DEG C
When drain sleeve heat exchanger, obtain modified material.
(III) the fresh fine stuff feeding preheating of generation heat exchange is passed through reaction after being warming up to 55 DEG C in double-tube heat exchanger
Kettle carries out high temperature and pressure hydro-thermal reaction in a kettle, repeats step (II), realizes preheating (heat exchange) and hydro-thermal reaction
It is carried out continuously, modified material is persistently discharged.
Embodiment 2
The present embodiment additionally provides a kind of method for preparing high concentration slurry, the modifier being prepared using embodiment 1
Material prepares high concentration slurry, and the method for preparing high concentration slurry specifically comprises the following steps:
(1) jet coal is crushed to partial size≤6mm (broken material does not control its average grain diameter generally, but controls
Maximum discharging partial size), broken jet coal is divided into the first feed coal and the second feed coal by quality, the first feed coal and
The mass ratio of second feed coal is 1:9.
It carries out Ultrafine Grinding after (2) first feed coals, water, modified material and additive mixing and obtains mass fraction to be 25wt%
Modified slurry, the average grain diameter of modified slurry is 13 μm；Wherein, the butt amount of the first feed coal, additive and modified material
The mass ratio of butt amount be 10:0.05:2, the water content of the first feed coal is 13.5%, and additive is water content 6.5%
Sodium lignin sulfonate.
Rod milling, which is carried out, after the modified slurry mixing that (3) second feed coals, water, additive and step (2) obtain obtains institute
The high concentration slurry stated；Wherein, the mass ratio of the butt amount of the butt amount of the second feed coal, additive and modified slurry is 90:
0.45:12.05, the water content of the second feed coal are 13.5%, and additive is the sodium lignin sulfonate of water content 6.5%.
The concentration for the high concentration slurry being prepared, viscosity and average grain diameter are surveyed referring to GB/T 18856-2008
Examination, the mass percent that test obtains high concentration slurry is 65wt%, and viscosity 1025mps, average grain diameter is 135 μm.
Embodiment 3
A kind of method of modifying for settling waste is present embodiments provided, the method for modifying is mentioned in specific embodiment
It is carried out in the sedimentation waste reforming system of confession, the method for modifying specifically comprises the following steps:
(I) municipal sludge slurry (mass percent 5wt%) is stored in material trough, and municipal sludge slurry is passed through into diaphragm pump
It is sent into tubular heat exchanger and is preheated, sludge is passed through reaction kettle after being preheated to 60 DEG C, carry out high-temperature high pressure water in a kettle
Thermal response carries out hydrothermal degradation to flocculant therein, and the reaction temperature of hydro-thermal reaction is 200 DEG C, reaction pressure 2MPa；
(II) modified high temperature sludge enters tubular heat exchanger by the buffering insulation effect of attemperator, changes in tubulation
Heat exchange occurs with fresh sewage sludge feed in hot device to preheat it, the temperature of the modification tubular heat exchanger after heat exchange is down to 70 DEG C
When tubular heat exchanger is discharged, obtain modified material.
(III) the fresh sludge feeding preheating of generation heat exchange is passed through reaction kettle after being warming up to 60 DEG C in tubular heat exchanger,
High temperature and pressure hydro-thermal reaction is carried out in a kettle, is repeated step (II), realizes the company of preheating (heat exchange) and hydro-thermal reaction
Continuous to carry out, modified material is persistently discharged.
Embodiment 4
A kind of method for preparing high concentration slurry is present embodiments provided, the modification material being prepared using embodiment 3
High concentration slurry is prepared, the method for preparing high concentration slurry specifically comprises the following steps:
(1) meager coal is crushed to partial size≤8, broken meager coal is divided into the first feed coal and the second raw material by quality
The mass ratio of coal, the first feed coal and the second feed coal is 1.5:8.5.
It carries out Ultrafine Grinding after (2) first feed coals, water, modified material and additive mixing and obtains mass fraction to be 30wt%
Modified slurry, the average grain diameter of modified slurry is 5 μm；Wherein, the butt amount of the first feed coal, additive and modified material
The mass ratio of butt amount is 15:0.2:5, and the water content of the first feed coal is 10%, and additive is the naphthalene sulfonic acids first of water content 8%
Aldehyde condensate.
Rod milling, which is carried out, after the modified slurry mixing that (3) second feed coals, water, additive and step (2) obtain obtains institute
The high concentration slurry stated；Wherein, the mass ratio of the butt amount of the butt amount of the second feed coal, additive and modified slurry is 85:
0.3:20.2, the water content of the second feed coal are 10%, and additive is the sodium lignin sulfonate of water content 6%.
The concentration for the high concentration slurry being prepared, viscosity and average grain diameter are surveyed referring to GB/T 18856-2008
Examination, the mass percent that test obtains high concentration slurry is 64wt%, and viscosity 1123mps, average grain diameter is 120 μm.
Embodiment 5
A kind of method of modifying for settling waste is present embodiments provided, the method for modifying is mentioned in specific embodiment
It is carried out in the sedimentation waste reforming system of confession, the method for modifying specifically comprises the following steps:
(I) coal slirne (mass percent 7wt%) that coal washing generation is stored in material trough, coal slirne is passed through
It is back and forth pumped into double-tube heat exchanger and is preheated, coal slirne is passed through reaction kettle after being preheated to 55 DEG C, carry out in a kettle high
Warm high pressure hydro-thermal reaction carries out hydrothermal degradation to flocculant therein, and the reaction temperature of hydro-thermal reaction is 250 DEG C, and reaction pressure is
1.5MPa；
(II) modified high temperature coal slirne passes through the buffering insulation effect sleeve pipe heat exchanger of attemperator, in casing
Heat exchange occurs with fresh coal slirne charging in heat exchanger to preheat it, the temperature of the modification coal slirne after heat exchange is down to 65 DEG C
When drain sleeve heat exchanger, obtain modified material；
(III) the fresh coal slirne feeding preheating of generation heat exchange is passed through reaction after being warming up to 55 DEG C in double-tube heat exchanger
Kettle carries out high temperature and pressure hydro-thermal reaction in a kettle, repeats step (II), realizes preheating (heat exchange) and hydro-thermal reaction
It is carried out continuously, modified material is persistently discharged.
Embodiment 6
A kind of method for preparing high concentration slurry is present embodiments provided, the modification material being prepared using embodiment 5
High concentration slurry is prepared, the method for preparing high concentration slurry specifically comprises the following steps:
(1) by brown coal crushing to partial size≤10mm, broken lignite is divided into the first feed coal and the second original by quality
The mass ratio of material coal, the first feed coal and the second feed coal is 2.5:7.5.
It carries out Ultrafine Grinding after (2) first feed coals, water, modified material and additive mixing and obtains mass fraction to be 31wt%
Modified slurry, the average grain diameter of modified slurry is 6 μm；Wherein, the butt amount of the first feed coal, additive and modified material
The mass ratio of butt amount is 25:0.5:1, and the water content of the first feed coal is 20%, and additive is the naphthalene sulfonic acids first of water content 8%
Aldehyde condensate.
Rod milling, which is carried out, after the modified slurry mixing that (3) second feed coals, water, additive and step (2) obtain obtains institute
The high concentration slurry stated；Wherein, the mass ratio of the butt amount of the butt amount of the second feed coal, additive and modified slurry is 75:
0.5:26.5, the water content of the second feed coal are 20%, and additive is the sodium humate of water content 5%.
The concentration for the high concentration slurry being prepared, viscosity and average grain diameter are surveyed referring to GB/T 18856-2008
Examination, the mass percent that test obtains high concentration slurry is 55wt%, and viscosity 1270mps, average grain diameter is 150 μm.
Embodiment 7
A kind of method of modifying for settling waste is present embodiments provided, the method for modifying is mentioned in specific embodiment
It is carried out in the sedimentation waste reforming system of confession, the method for modifying specifically comprises the following steps:
(I) the greasy filth slurry that generates in oil exploitation and transportational process is stored in material trough, and (mass percent is
10wt%), greasy filth slurry is pumped into tubular heat exchanger by screw rod and is preheated, greasy filth slurry is passed through reaction after being preheated to 56 DEG C
Kettle carries out high temperature and pressure hydro-thermal reaction in a kettle and carries out hydrothermal degradation, the reaction temperature of hydro-thermal reaction to flocculant therein
Degree is 280 DEG C, reaction pressure 1MPa；
(II) modified high temperature oil mud enters tubular heat exchanger by the buffering insulation effect of attemperator, in tubulation
Heat exchange occurs with fresh greasy filth slurry charging in heat exchanger to preheat it, the temperature of the modified oil mud after heat exchange is down to 70 DEG C
When tubular heat exchanger is discharged, obtain modified material.
(III) the green oil mud feeding preheating of generation heat exchange is passed through reaction after being warming up to 56 DEG C in tubular heat exchanger
Kettle carries out high temperature and pressure hydro-thermal reaction in a kettle, repeats step (II), realizes preheating (heat exchange) and hydro-thermal reaction
It is carried out continuously, modified material is persistently discharged.
Embodiment 8
A kind of method for preparing high concentration slurry is present embodiments provided, the modification material being prepared using embodiment 7
High concentration slurry is prepared, the method for preparing high concentration slurry specifically comprises the following steps:
(1) bituminous coal is crushed to partial size≤3mm, broken bituminous coal is divided into the first feed coal and the second raw material by quality
The mass ratio of coal, the first feed coal and the second feed coal is 3:7.
It carries out Ultrafine Grinding after (2) first feed coals, water, modified material and additive mixing and obtains mass fraction to be 38wt%
Modified slurry, the average grain diameter of modified slurry is 25 μm；Wherein, the butt amount of the first feed coal, additive and modified material
The mass ratio of butt amount be 30:0.1:8, the water content of the first feed coal is 7%, and additive is the lignin of water content 8%
Sodium sulfonate.
Rod milling, which is carried out, after the modified slurry mixing that (3) second feed coals, water, additive and step (2) obtain obtains institute
The high concentration slurry stated；Wherein, the mass ratio of the butt amount of the butt amount of the second feed coal, additive and modified slurry is 70:
0.2:38.1, the water content of the second feed coal are 7%, and additive is the potassium humate of water content 8%.
The concentration for the high concentration slurry being prepared, viscosity and average grain diameter are surveyed referring to GB/T 18856-2008
Examination, the mass percent that test obtains high concentration slurry is 66wt%, and viscosity 1077mps, average grain diameter is 139 μm.
Embodiment 9
A kind of method of modifying for settling waste is present embodiments provided, the method for modifying is mentioned in specific embodiment
It is carried out in the sedimentation waste reforming system of confession, the method for modifying specifically comprises the following steps:
(I) the coal dust slurry (mass percent 12wt%) that coal washing generation is stored in material trough is starched coal dust logical
It crosses in centrifugal pump feeding double-tube heat exchanger and is preheated, coal dust slurry is passed through reaction kettle after being preheated to 58 DEG C, carries out in a kettle
High temperature and pressure hydro-thermal reaction carries out hydrothermal degradation to flocculant therein, and the reaction temperature of hydro-thermal reaction is 350 DEG C, reaction pressure
For 0.5MPa；
(II) modified high-temperature coal slurry passes through the buffering insulation effect sleeve pipe heat exchanger of attemperator, in casing
Heat exchange occurs with fresh coal dust slurry charging in heat exchanger to preheat it, the temperature of the modified coal slurry after heat exchange is down to 72 DEG C
When drain sleeve heat exchanger, obtain modified material.
(III) the fresh coal dust that heat exchange occurs in double-tube heat exchanger, which is starched after feeding preheating is warming up to 58 DEG C, is passed through reaction
Kettle carries out high temperature and pressure hydro-thermal reaction in a kettle, repeats step (II), realizes preheating (heat exchange) and hydro-thermal reaction
It is carried out continuously, modified material is persistently discharged.
Embodiment 10
A kind of method for preparing high concentration slurry is present embodiments provided, the modification material being prepared using embodiment 9
High concentration slurry is prepared, the method for preparing high concentration slurry specifically comprises the following steps:
(1) meager lean coal is crushed to partial size≤13mm, broken meager lean coal is divided into the first feed coal and by quality
The mass ratio of two feed coals, the first feed coal and the second feed coal is 1.1:8.9.
It carries out Ultrafine Grinding after (2) first feed coals, water, modified material and additive mixing and obtains mass fraction to be 32wt%
Modified slurry, the average grain diameter of modified slurry is 10 μm；Wherein, the butt amount of the first feed coal, additive and modified material
The mass ratio of butt amount be 11:0.2:3, the water content of the first feed coal is 12%, and additive is the lignin of water content 8%
Sodium sulfonate.
Rod milling, which is carried out, after the modified slurry mixing that (3) second feed coals, water, additive and step (2) obtain obtains institute
The high concentration slurry stated；Wherein, the mass ratio of the butt amount of the butt amount of the second feed coal, additive and modified slurry is 89:
0.3:14.2, the water content of the second feed coal are 12%, and additive is the naphthalenesulfonateformaldehyde formaldehyde contracting object of water content 5%.
The concentration for the high concentration slurry being prepared, viscosity and average grain diameter are surveyed referring to GB/T 18856-2008
Examination, the mass percent that test obtains high concentration slurry is 61wt%, and viscosity 1122mps, average grain diameter is 70 μm.
Embodiment 11
A kind of method of modifying for settling waste is present embodiments provided, the method for modifying is mentioned in specific embodiment
It is carried out in the sedimentation waste reforming system of confession, the method for modifying specifically comprises the following steps:
(I) waste residue slurry (mass percent 15wt%) that the coal water slurry gasification process stored in material trough generates, will give up
Slurry is pumped into tubular heat exchanger by diaphragm and is preheated, and waste residue slurry is passed through reaction kettle after being preheated to 55 DEG C, in reaction kettle
Middle progress high temperature and pressure hydro-thermal reaction carries out hydrothermal degradation to flocculant therein, and the reaction temperature of hydro-thermal reaction is 400 DEG C, instead
Answering pressure is 0.1MPa；
(II) modified high temperature waste residue slurry enters tubular heat exchanger by the buffering insulation effect of attemperator, in tubulation
Heat exchange occurs with fresh waste residue slurry charging in heat exchanger to preheat it, the temperature of the modification waste residue slurry after heat exchange is down to 65 DEG C
When tubular heat exchanger is discharged, obtain modified material.
(III) the fresh waste residue slurry feeding preheating that heat exchange occurs with modified waste residue slurry in tubular heat exchanger is warming up to 55
It is passed through reaction kettle after DEG C, carries out high temperature and pressure hydro-thermal reaction in a kettle, repeats step (II), realizes preheating (heat exchange)
With being carried out continuously for hydro-thermal reaction, modified material is persistently discharged.
Embodiment 12
A kind of method for preparing high concentration slurry is present embodiments provided, the modification material being prepared using embodiment 11
High concentration slurry is prepared, the method for preparing high concentration slurry specifically comprises the following steps:
(1) jet coal is crushed partial size≤10 μm, broken jet coal is divided into the first feed coal and second by quality
The mass ratio of feed coal, the first feed coal and the second feed coal is 3:7.
It carries out Ultrafine Grinding after (2) first feed coals, water, modified material and additive mixing and obtains mass fraction to be 38wt%
Modified slurry, the average grain diameter of modified slurry is 17 microns；Wherein, butt amount, additive and the modifier of the first feed coal
The mass ratio of the butt amount of material is 30:0.5:10, and the water content of the first feed coal is 15%, and additive is the corruption of water content 6%
Grow sour sodium.
Rod milling, which is carried out, after the modified slurry mixing that (3) second feed coals, water, additive and step (2) obtain obtains institute
The high concentration slurry stated；Wherein, the mass ratio of the butt amount of the butt amount of the second feed coal, additive and modified slurry is 70:
0.4:40.5, the water content of the second feed coal are 15%, and additive is the naphthalene sulfonic acid-formaldehyde condensation product of water content 8%.
The concentration for the high concentration slurry being prepared, viscosity and average grain diameter are surveyed referring to GB/T 18856-2008
Examination, the mass percent that test obtains high concentration slurry is 58wt%, and viscosity 988mps, average grain diameter is 100 μm.
The Applicant declares that the foregoing is merely a specific embodiment of the invention, but protection scope of the present invention not office
It is limited to this, it should be clear to those skilled in the art, any to belong to those skilled in the art and take off in the present invention
In the technical scope of dew, any changes or substitutions that can be easily thought of, and all of which fall within the scope of protection and disclosure of the present invention.
Claims (10)
1. a kind of method of modifying for settling waste, which is characterized in that the method for modifying includes:
Hydro-thermal reaction, flocculant therein of degrading are carried out to sedimentation waste.
2. the method for modifying of sedimentation waste according to claim 1, which is characterized in that the method for modifying specifically wraps
Include following steps:
(I) hydro-thermal reaction is carried out after sedimentation waste is preheated, flocculant therein of degrading obtains reaction product；
(II) reaction product carries out heat exchange with sedimentation waste when charging and realizes preheating described in step (I).
3. the method for modifying of sedimentation waste according to claim 2, which is characterized in that sedimentation described in step (I) is useless
Gurry is the combination of one of sludge, coal slime, gasified waste residue or greasy filth or at least two；
Preferably, the mass percent of the sedimentation waste is 3~15wt%；
Preferably, the reaction temperature of the hydro-thermal reaction is 200~400 DEG C；
Preferably, the reaction pressure of the hydro-thermal reaction is 0.1~2MPa.
4. a kind of reforming system for settling waste, which is characterized in that the reforming system is appointed for carrying out claim 1-3
The method of modifying of waste is settled described in one；
The reforming system includes sequentially connected feed unit and reaction member.
5. the reforming system of sedimentation waste according to claim 4, which is characterized in that the feed unit is according to heavy
The charging flow direction for dropping waste includes sequentially connected material storage device and conveying device；
Preferably, any one of the conveying device in centrifugal pump, diaphragm pump, reciprocating pump or screw pump；
Preferably, the reaction member includes sequentially connected preheating device and reaction unit, settles the preheated dress of waste
Enter reaction unit after setting preheating；
Preferably, the reaction unit discharge port is also connected with the heat exchange mouth of preheating device, the reaction product of reaction unit discharge
Preheating device is returned to preheat sedimentation waste；
Preferably, the preheating device is double-tube heat exchanger or tubular heat exchanger.
6. the reforming system of sedimentation waste according to claim 4 or 5, which is characterized in that the reaction unit goes out
It is additionally provided with attemperator on the connecting line of material mouth and preheating device heat exchange mouth, the attemperator is used for reaction product
Carry out buffering heat preservation.
7. a kind of preparation method of high concentration slurry, which is characterized in that discarded using the described in any item sedimentations of claim 1-3
The modification material that the method for modifying of object is prepared prepares high concentration slurry；
The preparation method includes:
Feed coal, modified material, water and additive are subjected to wet process slurrying and obtain the high concentration slurry；
Wherein, the modification material is prepared into using the method for modifying of the described in any item sedimentation wastes of claim 1-3
It arrives.
8. the preparation method of high concentration slurry according to claim 7, which is characterized in that the preparation method is specifically wrapped
Include following steps:
(1) feed coal is divided into the first feed coal and the second feed coal after crushing, by the first feed coal, water, modified material and adds
Add agent to carry out wet process slurrying and obtains modified slurry；
The modified slurry that (2) second feed coals, water, additive and step (1) obtain carries out wet process slurrying and obtains the height
Consistency pulp.
9. the preparation method of high concentration slurry according to claim 7 or 8, which is characterized in that raw material described in step (1)
Coal is low-order coal；
Preferably, the low-order coal includes the group of one of jet coal, lignite, weathered coal or meager lean coal or at least two
It closes；
Preferably, the partial size≤13mm of the feed coal after crushing；
Preferably, the feed coal is divided into the first feed coal and the second feed coal by quality after crushing；
Preferably, the mass ratio of first feed coal and the second feed coal is (1~3): (7~9)；
Preferably, the mass ratio of the butt amount of first feed coal, modified material and additive is (10~30): (0.1~
10): (0.05~0.5)；
Preferably, the additive includes naphthalene sulfonic acid-formaldehyde condensation product, lignosulfonates, sulfonated humic acid salt, polycarboxylic acids
System one of or at least two combination；
Preferably, the wet process pulping process includes: to be surpassed after the first feed coal, water, modified material and additive mix
Fine grinding slurrying obtains modified slurry；
Wherein, the modification material is prepared using following methods:
(a) hydro-thermal reaction is carried out after sedimentation waste is preheated, flocculant therein of degrading obtains reaction product；
(b) reaction product carries out heat exchange with sedimentation waste when charging and realizes preheating described in step (a), the reaction after heat exchange
The modification material is obtained after product discharge；
Preferably, the mass percent of the modified slurry is 15~38%；
Preferably, the average grain diameter of the modified slurry is 2~25 μm.
10. according to the preparation method of the described in any item high concentration slurries of claim 7-9, which is characterized in that step (2) is described
The butt amount of the second feed coal, the butt amount of additive and modified slurry mass ratio be (70~90): (0.05~1):
(10.15~40.5)；
Preferably, the additive includes naphthalene sulfonic acid-formaldehyde condensation product, lignosulfonates, sulfonated humic acid salt, polycarboxylic acids
System one of or at least two combination；
Preferably, the wet process pulping process includes: to carry out stick after the second feed coal, water, additive and modified slurry mix
It grinds slurry and obtains the high concentration slurry；
Preferably, the mass percent of the high concentration slurry is 58~65%；
Preferably, the average grain diameter of the high concentration slurry is 70~150 μm.
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Application publication date: 20191203 |