CN101654323A - Method for drying sludge, corresponding thermoelectric plant and system outputting sludge - Google Patents
Method for drying sludge, corresponding thermoelectric plant and system outputting sludge Download PDFInfo
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- CN101654323A CN101654323A CN200810118788A CN200810118788A CN101654323A CN 101654323 A CN101654323 A CN 101654323A CN 200810118788 A CN200810118788 A CN 200810118788A CN 200810118788 A CN200810118788 A CN 200810118788A CN 101654323 A CN101654323 A CN 101654323A
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- mud
- heat
- sludge
- hot slag
- mummification
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Abstract
The invention discloses a method for drying sludge, which transfers the heat of hot slag to the sludge directly and/or indirectly to implement the drying of the sludge. On one hand, the sludge is dried by the after heat of the low-cost hot slag so as to reduce the cost of drying the sludge; on the other hand, the quick cooling of the hot slag is realized. The invention also discloses a thermoelectric plant adopting the method and a system outputting sludge and adopting the method.
Description
Technical field
[01] the present invention relates generally to green technology, and Sludge Disposal Techniques especially particularly relates to a kind of method of dewatered sludge.The present invention also further relates to heat power plant's (for example power station or thermal source boiler etc.) that adopts described method and the system (for example, sewage work, paper mill, printing and dyeing mill or plant etc.) that the mud output is arranged.
Background technology
[02] along with development of science and technology and the people raising day by day to environmental requirement, ratio and the degree in the world wide sewage handled improve gradually.Mud is the solid waste that produces in the sewage treatment process, mainly contain city dehydrated sludge and industrial dewatered sludge (as paper mill sludge, printing and dyeing sludge etc.), along with development of urbanization and progress of industry, the output of mud is increasing, and the requirement of mud being carried out innoxious, minimizing, stabilization, disposal of resources is also more and more urgent.The mummification of mud then is the necessary link of sludge disposal.Utilize the used heat dewatered sludge, help reducing the mummification cost of mud, promote the development and progress of sludge drying.Traditional used heat dewatered sludge mainly is flue gas and the steam waste heat that utilizes boiler or kiln.Utilize the flue gas dewatered sludge to mainly contain following deficiency: the one, in order to guarantee effective operation of boiler, flue gas can not extract too much, and the second, need more powerful blower fan, investment is big, running cost is high.Utilize steam heating then to need combustion fuel, cause with high costs to produce the steam of capacity.Therefore need a kind of method of new dewatered sludge.
Summary of the invention
[03] main purpose of the present invention is: provide a kind of new sludge drying method, in order to overcome or to alleviate at least the defective and the deficiency of existing sludge drying method.The problem that technical problem to be solved by this invention is that the sludge drying consumes energy is many, the mummification cost is high and be difficult to promote the use of.
[04] the present inventor notices, hot slag has characteristics such as output is big, thermal capacitance height as the byproduct of power station and heat power plant.The contriver notices further that also itself also need cool off hot slag, and normally adopts special-purpose cooling apparatus that it is cooled off in the prior art; Perhaps to its water-sprinkling, to realize cooling.And then the hot slag cooling that the present inventor will be all discharge combines with sludge drying, and a kind of new sludge drying method is provided.Described method is that the heat with hot slag directly and/or indirectly passes to the mud for the treatment of mummification, to heat described mud, realizes sludge drying.
[05] as the sludge drying thermal source, the mummification for mud provides heat to this method on the one hand, has realized the cooling of hot slag on the other hand with hot slag.Thereby has the advantage that the sludge drying cost reduces greatly.
[06] preferably, described method can comprise: make the metal hot wall of described hot slag direct heating sludge drying equipment, by metal hot wall heating mud, realize the mummification of described mud again.
[07] preferably, described method can comprise: make described hot slag add warm air, incombustible gas and/or non-combustion-supporting gas, heat with the direct described mud of contact of heated described air, incombustible gas and/or non-combustion-supporting gas and to it again, realize the mummification of described mud.
[08] preferably, described method can comprise: make described hot slag heat hot media, pass through sludge drying equipment again with the described mud of the heat transferred of heated thermal medium, realize the mummification of described mud.More preferably, described thermal medium can be the fluid or the gas that can conduct heat such as water, water vapor, air and heat conduction wet goods.
[09] preferably, described method can comprise: described hot slag is directly mixed with mud, with heating mud, realize the mummification of described mud.Further preferably, described method can comprise: the slag of the solid particulate in the mixture of slag and mud and the mud of mummification are separated.Like this can with slag with handle respectively after mud separates.
[10] preferably, described method can comprise the vent gas treatment step: the tail gas that will finish heat exchange is handled to satisfy the requirement that recycles and discharge or directly to send into boiler combustion.
[11] the present invention also provides a kind of heat power plant, it comprises one or more hot slag relief outlets, be provided with sludge drying equipment near in described hot slag relief outlet at least one, described heat power plant further comprises: the heat of the hot slag that will discharge from described at least one described hot slag relief outlet directly and/or indirectly is passed to mud in the described sludge drying equipment to realize the equipment of described sludge drying.
[12] preferably, described heat power plant can be power station and/or thermal source boiler.
[13] the present invention also provides a kind of system that the mud output is arranged, this system comprises one or more sets sludge drying equipment, the vicinity of at least one cover in described sludge drying equipment is provided with hot slag relief outlet, and described have the system of mud output further to comprise: the heat of the hot slag that will discharge from described hot slag relief outlet directly and/or indirectly is passed to mud in described at least one cover sludge drying equipment with the equipment of the mummification that realizes described mud.
[14] preferably, described have the system of mud output can comprise sewage work, paper mill, printing and dyeing mill and/or plant etc.
[15] the present invention compared with prior art has tangible advantage and beneficial effect.Via above technical scheme as can be known, for reaching aforesaid goal of the invention by technique scheme, the present invention has following advantage at least: the method that the invention provides a kind of dewatered sludge, utilize hot slag dewatered sludge, solved the high problem of mummification cost that needs a large amount of energy of consumption to cause because of the moisture content in the evaporation mud, reduced the cost of sludge drying, realized the recycling of afterheat of slags, be sludge stabilization, innoxious, the disposal and the utilization of minimizing and resource utilization provide reliable guarantee, realized simultaneously the running cost of power station and heat power plant has been saved in the slag cooling.
[16] in sum, the method of a kind of dewatered sludge of the present invention, it has above-mentioned many advantages and practical value, and in class methods, do not see have similar design to publish or use and really genus innovation, no matter it is all having bigger innovation on method or on the function, have large improvement technically, and more existing sludge drying method has the multinomial effect of enhancement, thereby be suitable for practicality more, and have the extensive utility value of industry, really be a new and innovative, progressive, practical new invention.
Embodiment
[17], the present invention is carried out further detailed explanation below in conjunction with preferred embodiment.
Embodiment 1
[18] a kind of method preferred embodiment of dewatered sludge, it mainly comprises: boiler, heat exchanger, sludge drying equipment, blower fan, wherein said method be by hot slag by heat exchanger heats gas, through the gas of heating by operations such as sludge drying equipment heating mud and vent gas treatment, all or part of water evaporates in the mud is gone out, thereby realize mummification to mud, wherein:
Heated air: process gas (as incombustible gas and/or non-combustion-supporting gases such as air and nitrogen, carbon dioxide gass) is blown over hot slag in the heat exchanger through blower fan etc., make hot slag and cold process gas carry out heat exchange, thus heating process gas.
Heating mud: thermal process gas by sludge drying equipment, is made thermal process gas and wet mud form convection current in sludge drying equipment and directly contacts and finish heat exchange, thereby the moisture content in the heating mud makes it evaporation.
Vent gas treatment: the tail gas that will finish heat exchange is directly sent into boiler combustion.
[19] the mummification equipment described in the present embodiment mainly contains rotary drum dryer and fluidized bed drying system etc., and they are to utilize process gas and the wet mud of heat directly to contact with the heat exchange of realization thermal process gas and wet mud by the mode of thermal convection.
Embodiment 2
[20] a kind of preferred embodiment of the method for dewatered sludge, wherein said method are the metal hot walls that utilizes hot slag direct heating sludge drying equipment, make water evaporates and carry out vent gas treatment simultaneously by the wet mud of metal hot wall heating again, wherein:
Hot slag direct heating metal hot wall: hot slag is by thermal radiation or Direct Contact Heating metal hot wall.
The wet mud of metal hot wall heating: the metal hot wall directly contacts with wet mud, and heat is conducted to the moisture content in the mud, makes it evaporation, thereby realizes the mummification of mud.
Vent gas treatment: the water vapor and the gas that produce in the mud evaporative process are carried out purifying treatment or directly sends into boiler combustion.
[21] form of the sludge drying equipment described in the present embodiment mainly contains structure formations such as rotating cylinder shape structure and driving band type.Wherein said drum-type structure is the circular drum of a rotation, and hot slag passes through in cylinder, and barrel is heated, and wet mud paves on cylinder outer wall, and makes wherein water evaporates by the cylinder outer wall heating.Wherein said driving band type structure is the bottom that hot slag is positioned at the metal transmission belt, heated by the hot slag under it when the metal transmission belt moves, and wet mud paves on the metal transmission belt, and is made wherein water evaporates by the heating of metal transmission belt.
Embodiment 3
[22] a kind of preferred embodiment of the method for dewatered sludge, equipment that this embodiment relates to or device mainly comprise: boiler, heat exchanger, sludge drying equipment, vacuum fan, thermal medium recycle unit, wherein said method make: fluid and/or gas that the hot slag of discharging in the boiler can conduct heat as the thermal oil of thermal medium or water, water vapor, air etc. by heat exchanger heats; Heat the metal hot wall of sludge drying equipment again by described thermal medium; Then by the wet mud evaporation of metal hot wall heating moisture content.The dry tail gas that produces is directly sent into boiler combustion, and the thermal medium recycle unit circulates fluid or the gas that thermal oil, water, water vapor and/or air etc. can conduct heat in system.Wherein:
The fluid or the gas that can conduct heat as the thermal oil of thermal medium or water, water vapor, air etc. by heat-exchange equipment heating: utilize hot slag to heat fluid or the gas that thermal oil or water, water vapor, air etc. can conduct heat by heat exchanging apparatus as thermal source.
By thermal medium heating sludge drying equipment: utilize the fluid that heated thermal oil or water, water vapor or air etc. can conduct heat or the metal hot wall of gas heating sludge drying equipment.
Evaporate moisture content by the wet mud of metal hot wall heating: mud is directly contacted with the metal hot wall of mummification equipment, heat is conducted dewing mud, and make water evaporates.
Vent gas treatment: the water vapor and the gas that produce in the mud evaporative process are carried out purifying treatment or directly sends into boiler combustion.
[23] the mummification equipment described in the present embodiment can be disk dryer, rotary blade type moisture eliminator and plate-spinning formula drying machine etc., is the heat-conduction-type drying mode of indirect heating.
Embodiment 4
[24] a kind of preferred embodiment of dewatered sludge method of the present invention, this embodiment utilizes the hot slag dewatered sludge of power station or heat power plant, comprises following processing step:
By mix, operations such as vent gas treatment, the separation of slag mud, all or part of moisture content in the mud is absorbed and evaporation is gone out, thereby realizes mummification mud.Wherein:
Mix: hot slag and mud are mixed together, and the heat that makes slag directly conduction is given mud, and makes water evaporates wherein, simultaneously, also makes slag can absorb the moisture content in the mud and strengthens the mummification effect of mud.
Vent gas treatment: with the water vapor that produces in the mud evaporative process with gas collects and carry out purifying treatment or send into boiler combustion.
Slag mud separates: the slag of the solid particulate in the mixture of slag and mud is separated from the mud of finishing mummification.
Embodiment 5
[25] in this embodiment, the hot slag and the mud of power station or heat power plant are mixed, make mud can fully absorb the heat of hot slag, and evaporate moisture content, also make slag can absorb the moisture content in the mud and strengthen the mummification effect of mud, simultaneously, carry out vent gas treatment, the mixture with slag and mud does not carry out just directly landfill or burning of any processing then.Wherein:
Mix: hot slag and mud are mixed together, and the heat that makes slag directly conduction is given mud, and makes water evaporates wherein, simultaneously, also makes slag can absorb the moisture content in the mud and strengthens the mummification effect of mud.
Vent gas treatment: the water vapor and the gas that produce in the mud evaporative process are carried out purifying treatment or directly sends into boiler combustion.
Embodiment 6: heat power plant
[26] this heat power plant comprises one or more hot slag relief outlets, be provided with sludge drying equipment near in described slag relief outlet at least one, described heat power plant further comprises: the heat of the hot slag that will discharge from described at least one described slag relief outlet directly and/or indirectly is passed to mud in the described sludge drying equipment with the equipment of the mummification that realizes described mud.Described heat power plant can be power station (especially mainly by burning coal or other power plant that generates electricity such as solid combustible) or thermal source boiler.
Embodiment 7: a kind of system that the mud output is arranged
[27] this kind has the system of mud output to comprise one or more sets sludge drying equipment, the vicinity of at least one cover in described sludge drying equipment is provided with hot slag relief outlet, and described have the system of mud output further to comprise: the heat of the hot slag that will discharge from described slag relief outlet directly and/or indirectly is passed to mud in described at least one cover sludge drying equipment with the equipment of the mummification that realizes described mud.Described the system of mud output is arranged can be sewage work, paper mill, printing and dyeing mill or plant, also can be its combination.
[28] the present invention utilizes the method and the corresponding heat power plant of hot slag dewatered sludge or the system of mud output is arranged, and all has many saving graces for technician of the same trade now, and possess skills really progressive and novelty.
[29] be basic design of the present invention as mentioned above.But, in technical field of the present invention,, can improve other exercisable embodiment of the present invention as long as possess the most basic knowledge.In the present invention substantive technical scheme has been proposed the patent protection request, its protection domain should comprise all variation patterns with above-mentioned technical characterstic.
[30] the above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (12)
1. the method for a dewatered sludge is characterized in that, the heat of hot slag directly and/or indirectly is passed to described mud, thereby realizes the mummification of mud.
2. the method for dewatered sludge as claimed in claim 1 may further comprise the steps: make the metal hot wall of described hot slag direct heating sludge drying equipment, by metal hot wall heating mud, realize the mummification of described mud again.
3. the method for dewatered sludge as claimed in claim 1, may further comprise the steps: make described hot slag add warm air, incombustible gas and/or non-combustion-supporting gas, heat with the direct described mud of contact of heated described air, incombustible gas and/or non-combustion-supporting gas and to it again, realize the mummification of described mud.
4. the method for dewatered sludge as claimed in claim 1 may further comprise the steps: described hot slag is heated thermal medium, pass through sludge drying equipment again with the described mud of the heat transferred of heated thermal medium, realize the mummification of described mud.
5. the method for dewatered sludge as claimed in claim 4, wherein, described thermal medium is the fluid or the gas that can conduct heat.
6. the method for dewatered sludge as claimed in claim 5, wherein, the described fluid or the gas that can conduct heat is water, water vapor, air and/or thermal oil.
7. the method for dewatered sludge as claimed in claim 1 may further comprise the steps: described hot slag is directly mixed with mud, with heating mud, realize the mummification of described mud.
8. as the method for each described dewatered sludge among the claim 1-7, comprise following vent gas treatment step: the tail gas that will finish heat exchange is handled to satisfy the requirement that recycles and discharge and/or directly to send into boiler combustion.
9. heat power plant, it comprises one or more hot slag relief outlets, it is characterized in that, be provided with sludge drying equipment near in described hot slag relief outlet at least one, described heat power plant further comprises: the heat of the hot slag that will discharge from described at least one described hot slag relief outlet directly and/or indirectly is passed to mud in the described sludge drying equipment with the equipment of the mummification that realizes described mud.
10. heat power plant as claimed in claim 9, wherein, described heat power plant is power station or thermal source boiler.
11. system that the mud output is arranged, it comprises one or more sets sludge drying equipment, it is characterized in that, the vicinity of at least one cover in described sludge drying equipment is provided with hot slag relief outlet, and described have the system of mud output further to comprise: the heat of the hot slag that will discharge from described hot slag relief outlet directly and/or indirectly is passed to mud in described at least one cover sludge drying equipment with the equipment of the mummification that realizes described mud.
12. the system that the mud output is arranged as claimed in claim 11, wherein, described have the system of mud output to comprise sewage work, paper mill, printing and dyeing mill and/or plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810118788A CN101654323A (en) | 2008-08-22 | 2008-08-22 | Method for drying sludge, corresponding thermoelectric plant and system outputting sludge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810118788A CN101654323A (en) | 2008-08-22 | 2008-08-22 | Method for drying sludge, corresponding thermoelectric plant and system outputting sludge |
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| CN101654323A true CN101654323A (en) | 2010-02-24 |
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| CN200810118788A Pending CN101654323A (en) | 2008-08-22 | 2008-08-22 | Method for drying sludge, corresponding thermoelectric plant and system outputting sludge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021061A (en) * | 2010-12-13 | 2011-04-20 | 北京昊业怡生科技有限公司 | Method for preparing fuel from organic sludge |
-
2008
- 2008-08-22 CN CN200810118788A patent/CN101654323A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021061A (en) * | 2010-12-13 | 2011-04-20 | 北京昊业怡生科技有限公司 | Method for preparing fuel from organic sludge |
| CN102021061B (en) * | 2010-12-13 | 2013-06-19 | 北京昊业怡生科技有限公司 | Method for preparing fuel from organic sludge |
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Application publication date: 20100224 |