CN101781072A - Sludge granulating and drying treatment method and sludge granulating and drying treatment equipment - Google Patents
Sludge granulating and drying treatment method and sludge granulating and drying treatment equipment Download PDFInfo
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- CN101781072A CN101781072A CN200910311363A CN200910311363A CN101781072A CN 101781072 A CN101781072 A CN 101781072A CN 200910311363 A CN200910311363 A CN 200910311363A CN 200910311363 A CN200910311363 A CN 200910311363A CN 101781072 A CN101781072 A CN 101781072A
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Abstract
The invention discloses a sludge granulating and drying treatment method. The method comprises the following steps: extruding filter pressed sludge into sludge strings by using a sludge string extruder arranged on the top of a forming tank; when the sludge strings drop downwards, spraying combustible powder serving as a partition on the sludge strings by adopting a powder gun which is fixedly connected on the forming tank, wherein the sludge strings coated with the combustible powder fall on a tumbling disk granulator of which the bottom is covered with the combustible powder; performing soft granulation under the rotation of the tumbling disk granulator; meanwhile, performing shadowless irradiation on the sludge strings during soft granulation by using an infrared lamp arranged on the lower part of the forming tank; forming dispersed sludge soft granules of which the surfaces are adhered with the combustible powder and are encrusted with dry shells; and feeding the sludge soft granules into a dryer for drying. The invention also discloses equipment for implementing the method. The sludge granulating and drying treatment method and the sludge granulating and drying treatment equipment are particularly suitable for sludge drying treatment aiming to realize sludge incineration and can promote the industrialization of sludge drying incineration.
Description
Technical field
The present invention relates to a kind of treatment process of mud, the method that particularly a kind of sludge drying is handled.The invention still further relates to the equipment of realizing this sludge drying processing method.
Background technology
Still up to 70%～80%, needing just before carrying out burning disposal usually, mud carries out the granulating and drying processing to sewage plant sludge through its water ratio of mechanical dehydration.The traditional sludge processing mode is hard granulation after the first mummification, promptly utilizes drying plant that the water content of mud is reduced earlier, carries out next step granulation again.Adopting comparatively general drying plant at present is rotary drier, its drying process is that wet mud directly adds from a higher end, and thermophore enters cylindrical shell from low side, along with the rotation of cylinder, the mud gravitate advances to low end, and the heat of absorption thermal barrier becomes dry gradually.There are the following problems for this technology: when mud has just entered drying cylinder, water capacity is very big, should be the steam output maximum this moment, the drying efficiency vertex, but because the wet mud of thickness this moment can't be broken, the mud top layer has fine and close " duricrust ", and mud and warm air disperse order of contact are very low, and vaporization efficiency is very low.When flight played a role in the tube to be dried, material moisture was generally below 40%, and at this moment material has run to more than the half way of revolving drum, causes the useful space not play one's part to the full.Simultaneously,, generally under comparatively high temps, just enter atmosphere, cause a large amount of thermals source wastes because the waste-gas heat that carried out heat exchange with mud is not used effectively.Above-mentioned reason make traditional revolving drum warm air drying method energy consumption height, efficient is low, time of drying is long, floor space is big, facility investment and working cost height.
Summary of the invention
The present invention provides a kind of mud granulizing drying method for solving the technical problem that exists in the known technology, and it can improve drying sludge efficient, improve the thermal utilization effect of warm air.The present invention also will provide a kind of equipment of realizing this method for this reason.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: a kind of mud granulizing drying method; mud after the press filtration is extruded into the mud string with the crowded mud string machine of moulding tank top; in the process that described mud string falls from top to bottom; the powder monitor that employing is fixed on the described moulding jar sprays the combustiblematerials powder as spacer to described mud string; the mud string of wrapping up in described combustiblematerials powder is fallen the bottom and is covered with on the tumbling disk granulator of described combustiblematerials powder; under the rotation of described tumbling disk granulator, carry out the software granulation; adopt the infrared lamp that is arranged on described moulding jar bottom that the mud string in the software granulation process is not had the shadow irradiation simultaneously; form the dispersion sludge soft particles that the surface is stained with described combustiblematerials powder and has dried shell, described sludge soft particles is sent into again carried out drying in the moisture eliminator at last.
Described moisture eliminator is a rotary drier.
Described combustiblematerials powder is any one in sawdust, coal dust, colliery powder and the stalk powder.
In order to realize above-mentioned sludge drying processing method; the technical solution used in the present invention is: a kind of mud granulizing equipment for drying; comprise the moulding jar, be fixed in the crowded mud string machine of described moulding tank top, the tumbling disk granulator that is installed in described moulding pot bottom, powder monitor be fixed in duster and the moisture eliminator that is connected with described tumbling disk granulator on the described moulding jar; described moulding jar top is provided with the filter window, and described moulding jar bottom is fixed with infrared lamp.
Described infrared lamp is packed on the sidewall of described moulding jar, and the place of being unkitted lamp on the described moulding jar lower sides is lined with heat reflection plate.
Described powder monitor is fixed on the center of described moulding jar.
Described crowded mud string machine comprises the hopper that is fixed on the mixing tank top and is fixed in discharging housing below the described hopper, described hopper comprises affixed shell and inner casing mutually, the center of described inner casing vertically is connected with motor reducer, the output shaft of described motor reducer connects turning axle, described turning axle is installed between described hopper and the described discharging housing, be connected with at least two uniform circular arc vanes on the described turning axle, the blade tip downside of each circular arc vane and the inner wall shape of described discharging housing are adaptive, described each circular arc vane is provided with stiffening web, a plurality of moulding hole of gathering on the described discharging housing.
Described discharging housing is the inverted cone stage body, and the cone angle of described inverted cone stage body is 60～150 °.
To the attenuation gradually of blade tip thickness, the distance between the inwall of the downside of described blade tip and described discharging housing is 0.5～3mm to described circular arc vane from blade root.
Advantage and positively effect that the present invention has are: adopt mud software granulating and drying pre-treatment and the incorporate method of rotary drier, earlier mud is extruded into the mud string, spray the combustiblematerials powder as spacer to the mud string, under the rotation of tumbling disk granulator, carry out the software granulation, with infrared lamp mud string outside surface being carried out radiation heating in granulation process handles, form surperficial mummification and be stained with the dispersive software small-particle of combustiblematerials powder, these software small-particles are sent into revolving drum drier again and are carried out drying, thereby improve the drying efficiency of drying machine, and the heat of air is effectively used, reduce the sludge drying cost; The combustiblematerials powder that sprays in Sludge Surface not only can be used as spacer and helps mud granulizing, effectively solves the mud caking and glues the wall problem, and the combustiblematerials powder can play combustion-supporting effect when the follow-up burning of mud simultaneously; Adopt the infrared lamp irradiation technique that the mud outside surface is added heat drying, have that rate of heating is fast, power consumption is few, heating quality is high, the characteristics that heat conversion is high, light is from different angular illumination, guarantee that the particle appearance all has enough brightness in the mud granulizing process, thereby form surperficial mummification, embrittlement, the mutual NA particle in cracked surface.Problem and shortage such as the invention solves the wet mud thickness of bulk in traditional rotary drier can't be broken, fine and close " duricrust " tied on the top layer easily, and the warm air heat is difficult to be used effectively and drying rate is low.Being particularly suitable for sludge incineration is the sludge drying processing of purpose; The present invention can promote the industrialization process of sludge anhydration burning.
Description of drawings
Fig. 1 is the structural representation of mud granulizing equipment for drying of the present invention;
Fig. 2 is the structural representation that the present invention squeezes mud string machine;
Fig. 3 is the structural representation that the present invention squeezes mud string machine circular arc vane.
Among the figure: 1, squeeze mud string machine, 1-1, motor reducer, 1-2, hopper; 1-2-1, inner casing, 1-2-2, shell, 1-3, discharging housing; 1-3-1, moulding hole, 1-4, circular arc vane, 1-4-1, stiffening web; 1-5, turning axle, 2, the filter window, 3, duster; 4, infrared lamp; 5, tumbling disk granulator, 6, rotary drier, 7, the moulding jar.
Embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, enumerate following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1; a kind of mud granulizing drying method of the present invention; concrete technology is that the mud after the Sewage Plant press filtration directly is extruded into the mud string from the crowded mud string machine 1 at moulding jar 7 tops; in the process that the mud string falls from top to bottom; the duster 3 that its powder monitor is arranged on moulding jar center therefrom mind-set mud string sprays the combustiblematerials powder as spacer; also powder monitor can be fixed on the sidewall of moulding jar 7; spray the combustiblematerials powder from lateral mud string; for ease of burning disposal after sludge drying or half-driedization; the combustiblematerials powder that sprays is a sawdust; coal dust; a kind of in colliery powder or the stalk powder; the mud string of wrapping up in the thin layer powder is fallen on the tumbling disk granulator 5; under the rotation of tumbling disk granulator 5, carry out the software granulation; infrared lamp 4 is installed in moulding jar 7 bottoms; the mud granule that 4 pairs of infrared lamps are being wrapped up in described combustiblematerials powder does not have the shadow irradiation in the software granulation process; make the surperficial mummification of sludge soft particles; embrittlement; cracking forms soft shell; these mud granules are sent into and are carried out drying on the rotary drier 6; the combustiblematerials powder that the surface is stained with also has soft shell and plays the isolation mud granule; avoid agglutinating effect mutually between the particle, thereby guarantee that thermal medium fully contacts with software particle outside surface in the revolving drum drying process; improve drying efficiency.
Above-mentioned rotary drier 6 also can replace with conveyor dryer.
The equipment of realizing aforesaid method comprises the mud string machine 1 that squeezes; filter window 2; duster 3; a plurality of infrared lamps 4; tumbling disk granulator 5; rotary drier 6; moulding jar 7; described crowded mud string machine 1 is fixed in described moulding jar 7 tops; squeeze mud string machine 1 center and do not have mudhole; the inlet that squeezes mud string machine 1 is connected with sludge bin; the powder monitor of described duster 3 is arranged in the center of moulding jar; described tumbling disk granulator 5 is arranged on the bottom of moulding jar 7; tumbling disk granulator 5 side discharge ports are communicated with rotary drier 6; described filter window 2 is arranged on around the crowded mud string machine 1 of moulding tank top; the gas that is used in the moulding jar 7 outwards appears, and stops the dust in the moulding jar 7 outwards to appear.The number of plies of described infrared lamp setting is 1～2 layer.
See also Fig. 2～Fig. 3, the structure of above-mentioned crowded mud string machine 1 is: comprise the hopper 1-2 that is fixed on mixing tank 6 tops and be fixed in discharging housing 1-3 below the described hopper 1-2, described hopper 1-2 comprises affixed shell 1-2-2 and inner casing 1-2-1 mutually, the center of described inner casing 1-2-1 vertically is connected with motor reducer 1-1, the output shaft of described motor reducer 1-1 connects turning axle 1-5, described turning axle 1-5 is installed between described hopper 1-2 and the described discharging housing 1-3, be connected with 4 uniform circular arc vane 1-4 on the described turning axle 1-5, the inner wall shape of the blade tip downside of each circular arc vane 1-4 and described discharging housing 1-3 is adaptive, described each circular arc vane 1-4 is provided with two stiffening web 1-4-1, and described discharging housing 1-3 goes up a plurality of moulding hole 1-3-1 that gathers.The quantity of the quantity of circular arc vane 1-4 and stiffening web 1-4-1 can specifically be determined according to the specification of squeezing mud string machine, but the quantity of circular arc vane 1-4 must not be less than two.For guaranteeing that bigger discharging area is arranged and prevent that the mud string of extruding is bonded to piece again, described discharging housing 1-3 adopts the inverted cone stage body, and the cone angle of described inverted cone stage body is 60～150 °.For guaranteeing the structural strength of circular arc vane 1-4, to the attenuation gradually of blade tip thickness, the distance between the inwall of the downside of described blade tip and described discharging housing 1-3 is 0.5～3mm to described circular arc vane 1-4 from blade root.For making wet sewage sludge feed conveniently and to the intravital mud of discharging shell produce extruding, the inner casing of described hopper adopts the circular cone stage body, and the shell of described hopper 1-2 is a right cylinder.The thickness of slab of described discharging housing 1-3 is 0.5～6cm, and in order to prevent wet sludge blockage, it is that rounding taper type bottom is a cylindrical configuration that described moulding hole 1-3-1 can adopt top, also can adopt cylindrical structural certainly.During use, to wet mud from hopper 1-2 inside and outside shell 1-2-1, blanking channel between the 1-2-2 is sent in the discharging housing 1-3, circular arc vane 1-4 on the motor reducer 1-1 driven rotary axle 1-5 rotates, in circular arc vane 1-4 rotary course, mud is extruded into discharging housing 1-3 inboard under oblique by blade back, the blade tip of circular arc vane 1-4 is continuously scraped mud to the 1-3-1 of moulding hole, wet like this mud is extruded discharging housing 1-3 in the 1-3-1 of moulding hole, rely on the cohesive force between the colloidalmaterial to form wet mud bar, because self gravitation disconnects bunchiness, the diameter range of mud string can require to determine the moulding aperture to it according to the user to the mud bar in dropping process.
Above-mentioned crowded mud string machine is not limited to adopt said structure, also can adopt other structure, and for example the patent No. is the structure of 93241884.8 disclosed colloid granulation diverting devices.
Above-mentioned mud granulizing drying method embodiment 1: the granulation of sawdust parcel sludge soft particles, 1) sewage plant sludge of water ratio 70%～80% is directly extruded from squeezing mud string machine 1; 2) Sludge Surface is sprayed sawdust, sawdust with and the mass ratio of wet mud be 1: 12; 3) tumbling disk granulator 4 carries out the software granulation, and the granulation time is 2 minutes, and always with infrared lamp 4 irradiations, the diameter of pelletizing finished product is the spheroid of 5～20mm in the time of granulation.4) the above-mentioned sludge soft particles that is a granulated into is sent into rotary drier and carry out mummification, do not lump, glue problems such as wall in the mud granule drying process, sawdust in the present embodiment with and the mass ratio of wet mud be not limited to 1: 12, also can adopt other mass ratioes, as sawdust with and the mass ratio of wet mud is 1: 10 or sawdust and mass ratio with wet mud is 1: 15, the granulation time can be 2 minutes or 3 minutes, through evidence, can obtain identical technique effect with the foregoing description.
Mud granulizing drying method embodiment 2: coal dust parcel sludge soft particles granulation, spray coal dust in Sludge Surface, coal dust with and the mass ratio of wet mud be 1: 15, the granulation time is 2 minutes, all the other processing parameters are with example 1, the above-mentioned sludge soft particles that is a granulated into is sent into rotary drier carry out mummification, do not lump, glue problems such as wall in the mud granule drying process, present embodiment is not limited to the granulation of coal dust parcel sludge soft particles, and is applicable to the granulation of colliery powder parcel sludge soft particles.Coal dust in the present embodiment with and the mass ratio of wet mud be not limited to 1: 15, also can adopt other mass ratioes, as coal dust with and the mass ratio of wet mud is 1: 10 or coal dust and mass ratio with wet mud is 1: 20, the granulation time can be 2 minutes or 3 minutes, through evidence, can obtain identical technique effect with the foregoing description.
Mud granulizing drying method embodiment 3: stalk powder parcel sludge soft particles granulation, spray the cornstalk powder in Sludge Surface, the cornstalk powder with and the mass ratio of wet mud be 1: 12, the granulation time is 2 minutes, all the other processing parameters are with example 1, the above-mentioned sludge soft particles that is a granulated into is sent into rotary drier carry out mummification, do not lump, glue problems such as wall in the mud granule drying process.Cornstalk powder in the present embodiment with and the mass ratio of wet mud be not limited to 1: 12, also can adopt other mass ratioes, as the cornstalk powder with and the mass ratio of wet mud be 1: 10 or cornstalk powder with and the mass ratio of wet mud be 1: 15, the time of granulation in like manner can be 2 minutes or 3 minutes, through evidence, can obtain identical technique effect with the foregoing description.
A kind of mud granulizing drying method of the present invention and equipment thereof are not limited to sewage plant sludge, and are applicable to high humiditys such as paper mill sludge, printing and dyeing sludge, pharmacy mud, high sticking mud.
Characteristics of the present invention are that mud is extruded into the mud string from above; utilize mud self viscosity to realize sawdust surface adhesion outside; utilize tumbling disk granulator that mud is made circular software particle again, the purpose that reach the wet direct granulation of mud, improves subsequent sludge drying efficient, reduces cost.
Although in conjunction with the accompanying drawings the preferred embodiments of the present invention are described above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, can also make a lot of forms, these all belong within protection scope of the present invention.
Claims (9)
1. mud granulizing drying method; it is characterized in that; mud after the press filtration is extruded into the mud string with the crowded mud string machine of moulding tank top; in the process that described mud string falls from top to bottom; the powder monitor that employing is fixed on the described moulding jar sprays the combustiblematerials powder as spacer to described mud string; the mud string of wrapping up in described combustiblematerials powder is fallen the bottom and is covered with on the tumbling disk granulator of described combustiblematerials powder; under the rotation of described tumbling disk granulator, carry out the software granulation; adopt the infrared lamp that is arranged on described moulding jar bottom that the mud string in the software granulation process is not had the shadow irradiation simultaneously; form the dispersion sludge soft particles that the surface is stained with described combustiblematerials powder and has dried shell, described sludge soft particles is sent into again carried out drying in the moisture eliminator at last.
2. mud granulizing drying method according to claim 1 is characterized in that, described moisture eliminator is a rotary drier.
3. mud granulizing drying method according to claim 1 is characterized in that, described combustiblematerials powder is any one in sawdust, coal dust, colliery powder and the stalk powder.
4. equipment of realizing the described mud granulizing drying method of claim 1; it is characterized in that; comprise the moulding jar, be fixed in the crowded mud string machine of described moulding tank top, the tumbling disk granulator that is installed in described moulding pot bottom, powder monitor be fixed in duster and the moisture eliminator that is connected with described tumbling disk granulator on the described moulding jar; described moulding jar top is provided with the filter window, and described moulding jar bottom is fixed with infrared lamp.
5. mud granulizing equipment for drying according to claim 4 is characterized in that, described infrared lamp is packed on the sidewall of described moulding jar, and the place of being unkitted lamp on the described moulding jar lower sides is lined with heat reflection plate.
6. mud granulizing equipment for drying according to claim 4 is characterized in that described powder monitor is fixed on the center of described moulding jar.
7. mud granulizing equipment for drying according to claim 4, it is characterized in that, described crowded mud string machine comprises the hopper that is fixed on the mixing tank top and is fixed in discharging housing below the described hopper, described hopper comprises affixed shell and inner casing mutually, the center of described inner casing vertically is connected with motor reducer, the output shaft of described motor reducer connects turning axle, described turning axle is installed between described hopper and the described discharging housing, be connected with at least two uniform circular arc vanes on the described turning axle, the blade tip downside of each circular arc vane and the inner wall shape of described discharging housing are adaptive, described each circular arc vane is provided with stiffening web, a plurality of moulding hole of gathering on the described discharging housing.
8. mud granulizing equipment for drying according to claim 7 is characterized in that, described discharging housing is the inverted cone stage body, and the cone angle of described inverted cone stage body is 60～150 °.
9. mud granulizing equipment for drying according to claim 7 is characterized in that, to the attenuation gradually of blade tip thickness, the distance between the inwall of the downside of described blade tip and described discharging housing is 0.5～3mm to described circular arc vane from blade root.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910311363A CN101781072A (en) | 2009-12-14 | 2009-12-14 | Sludge granulating and drying treatment method and sludge granulating and drying treatment equipment |
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| CN200910311363A CN101781072A (en) | 2009-12-14 | 2009-12-14 | Sludge granulating and drying treatment method and sludge granulating and drying treatment equipment |
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| CN101781072A true CN101781072A (en) | 2010-07-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109999719A (en) * | 2019-04-26 | 2019-07-12 | 沈阳航空航天大学 | A kind of rotary kiln type sludge coal dust Granulation Equipments |
| CN112387211A (en) * | 2020-10-29 | 2021-02-23 | 西北农林科技大学 | Method and device for mixing and granulating thick slurry and dry powder |
-
2009
- 2009-12-14 CN CN200910311363A patent/CN101781072A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109999719A (en) * | 2019-04-26 | 2019-07-12 | 沈阳航空航天大学 | A kind of rotary kiln type sludge coal dust Granulation Equipments |
| CN112387211A (en) * | 2020-10-29 | 2021-02-23 | 西北农林科技大学 | Method and device for mixing and granulating thick slurry and dry powder |
| CN112387211B (en) * | 2020-10-29 | 2022-06-14 | 西北农林科技大学 | Method and device for mixing and granulating thick slurry and dry powder |
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Open date: 20100721 |