阅读说明：本技术 一种沉降废弃物的改性方法、改性系统及使用改性产物制备高浓度浆料的方法 (A method of the sedimentation method of modifying of waste, reforming system and high concentration slurry is prepared using modified product ) 是由 何国锋 吕向阳 张胜局 赵力明 柳金秋 孙海勇 王冉 陈浩 徐明磊 段静 刘烨炜 于 2019-10-14 设计创作，主要内容包括：本发明提供了一种沉降废弃物的改性方法、改性系统及使用改性产物制备高浓度浆料的方法,所述的改性方法包括：对沉降废弃物进行水热反应,降解其中的絮凝剂。所述的改性系统用于进行所述的沉降废弃物的改性方法；所述的改性系统包括依次连接的进料单元和反应单元。所述制备高浓度浆料的方法包括：将原料煤、改性物料、水和添加剂进行湿法制浆得到所述的高浓度浆料。沉降废弃物经过高温高压改性后,可有效降解沉降废弃物中的絮凝剂,减少絮凝剂对煤制浆浓度的不利影响,从而达到利用沉降废弃物制备高浓度料浆的目的。(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.)

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.

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.