CN201793466U - Sludge anhydration device and corresponding sludge combustion device - Google Patents
Sludge anhydration device and corresponding sludge combustion device Download PDFInfo
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- CN201793466U CN201793466U CN2010291660291U CN201029166029U CN201793466U CN 201793466 U CN201793466 U CN 201793466U CN 2010291660291 U CN2010291660291 U CN 2010291660291U CN 201029166029 U CN201029166029 U CN 201029166029U CN 201793466 U CN201793466 U CN 201793466U
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- sludge
- mud
- anhydration
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- drying
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The utility model discloses a sludge anhydration device and a corresponding sludge combustion device. The sludge anhydration device comprises an anhydration device, a sensing device and a control device, wherein, the anhydration device is used for drying sludge; and the sensing device is arranged in the anhydration device and used for sensing the moisture content of the sludge. The control device is electrically connected with the sensing device and the anhydration device. The control device controls the anhydration device to stop drying the sludge when the sensing device senses that the moisture content of the sludge ranges from 70 to 40 percent. On one hand, the sludge anhydration device only removes moisture that is easy to be removed during the drying process, so that the energy efficiency and the time efficiency for removing the moisture of the sludge are improved; and on the other hand, the setting of the moisture content can also eliminate or at least greatly reduce the potential safety hazard that explosion is easy to occur during the sludge drying process. The sludge anhydration device is adopted by the sludge combustion device, a thermal power plant and a system.
Description
Technical field
The utility model relates to green technology, particularly relates to a kind of sludge drying equipment.The utility model also further relates to sludge incineration equipment, thermounit and the equipment that adopts described sludge drying equipment.
Background technology
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 one of main waste that produces in the sewage treatment process.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.And sludge drying is an importance of present sludge disposal.
Mud has high-moisture percentage and low heat value, and for example aspect water ratio, the water ratio of mud can reach 96%-98%.Therefore, first step that mud is handled is sludge drying often, and the mud after the mummification can carry out subsequent disposal and/or use, for example carries out landfill, burning, compost and brickmaking or the like.In the prior art, with sludge drying to water ratio be usually about 35% or lower after carry out subsequent disposal again.This kind mummification equipment can reduce the water content through dewatered sludge to greatest extent, to reduce subsequent transportation or conveying cost, to improve in the unit weight calorific value of changing mud.The shortcoming of this kind mummification equipment is: blast easily in drying process, be easy to generate dust pollution, and drying process consumes more heat, economic inefficiencies.
Therefore, wishing has a kind of novel sludge drying equipment to come mud is carried out more effective drying and other treatment, with save energy with reduce cost.
The utility model content
The purpose of this utility model is: a kind of new sludge drying equipment is provided, saves the energy consumption in the mud drying process, and reduce cost and increase production security.
For achieving the above object, the utility model provides a kind of novel sludge drying equipment, described sludge drying equipment comprise to mud carry out mummification desiccation apparatus, be arranged on the sensing apparatus and the control device that are used for the sensing sludge moisture content in the described desiccation apparatus, described control device is electrically connected with described sensing apparatus and described desiccation apparatus, when sensing device senses when sludge moisture content is in 70%～40% scope, described control device control desiccation apparatus stops the mummification to mud.It is pointed out that and to adopt the water content of any proper device (for example heating and evaporating unit, mechanical dehydration device, drying device, adjuvant adding device, hydrolysis device or pyrolysis installation with and arbitrary combination mode) sludge drying to 70%～40%.
Designer of the present utility model finds that the moisture in the mud mainly contains following four kinds of existence forms: intergranular interstitial water, and it accounts for 70% of mud total moisture; Between mud granule, form contained water in some little kapillaries, be called capillary water, account for 20% of sludge water content; Be adsorbed on the moisture of particle surface, be called planar water, account for 7% of sludge water content; Be present in the water in mud granule inside or the microorganism cells, be called internal water, account for 3% of sludge water content.The design people finds that further the difficulty of removing above-mentioned four kinds of moisture in the mud is successively in proper order: internal water＞planar water＞capillary water＞interstitial water.Being that internal water is the most difficult removes, and removes and interstitial water is the easiest.It is pointed out that mud can also comprise the free state water that can remove through gravitational settling and mechanical effect.
The process of moisture in the mud is removed in the mummification of mud exactly, and according to the difference of moisture percentage in sewage sludge after the mummification (mass ratio), the mummification degree of mud can be divided into following three kinds substantially: moisture percentage in sewage sludge belongs to shallow mummification after the mummification between 75%～40%; Moisture percentage in sewage sludge belongs to half-driedization after the mummification about 35%; Moisture percentage in sewage sludge belongs to absolutely dryization after the mummification about 10%.In the different steps of sludge drying, the speed that dries out is different, rate-of-loss of coolant height when water ratio is high, and rate-of-loss of coolant decreases when water ratio reduces.And in the drying process of mud, along with the minimizing of water content, the difficulty of mummification is increasing; And remove the water of unit vol, the energy that is consumed is also more and more.When adopting evaporation drying, the energy that ev u moisture is consumed is also increasing.
Therefore, sludge drying equipment of the present utility model brings following advantage with the water content of sludge drying to 70%～40%: on the one hand, and in drying process, only the moisture of easy removal is removed, improved Energy efficiency and time efficiency that sludge water content is removed.On the other hand, described water content setting can also be eliminated or alleviated the potential safety hazard of blasting easily in the mud drying process at least greatly.
Preferably, described sludge drying to water content can be in 60%～50% the scope.When the water content of mud smaller or equal to 60% the time, it is solid-state that mud is essentially, thereby easily mud is transported and transmits, and the amount efficiency that anhydrates of unit energy is higher during with the water content of sludge drying to 60%～50%.Further preferably, sludge drying can be in to its water content in 56%～54% the scope.More preferably, can be 55% with sludge drying to water content.
The utility model also provides a kind of sludge incineration method, in this sludge incineration method, after with above-mentioned sludge drying method mud being carried out drying and other treatment, further to carrying out burning disposal through dewatered sludge.70%～40% water content makes and need not to mix burning with other fuel during in burning through dewatered sludge, but can directly burn, and the saving that this also helps the energy also helps the reduction of the cost of investment of sludge incineration treatment facility; But also reduce in the traditional sludge incineration technology easily drying process such shortcoming of blasting.
Preferably, the heat of burning sludge generation can partly or entirely be used for mud is carried out mummification.This can realize burning the recovery of the heat that produces equally, with further conserve energy.
Preferably, can burn drop into incinerator or boiler through dewatered sludge.Thereby realize the efficient burning of mud.
The utility model also provides a kind of sludge incineration equipment, and described equipment comprises: mummification equipment is used for wet sludge anhydration to water content is in 70%～40% the scope; And burning facility, its be arranged on mummification equipment near, be used for the dewatered sludge after described mummification is equipment dried is burned.Thereby described equipment carries out burning disposal in the few and safe mode of energy consumption to mud.Preferably, described sludge incineration equipment further comprises the heat circulation device, is used to guide the heat that burning sludge is produced partly or wholly to guide to described sludge drying equipment to be used for that mud is carried out described drying and other treatment.
The utility model also provides a kind of heat power plant that comprises above-mentioned sludge incineration equipment.Thereby the mud that is produced is carried out burning disposal in the mode that energy consumption is few and safe.
The utility model also provides a kind of system, and it has mud output and above-mentioned sludge drying equipment.
Description of drawings
Fig. 1 is the schematic workflow diagram according to the sludge incineration equipment of the utility model one preferred embodiment, and this sludge incineration equipment adopts according to sludge drying equipment of the present utility model.
Embodiment
According to the sludge drying equipment of a specific embodiment of the utility model comprise to mud carry out mummification desiccation apparatus, be arranged on the sensing apparatus and the control device that are used for the sensing sludge moisture content in the described desiccation apparatus, described control device is electrically connected with described sensing apparatus and described desiccation apparatus, when sensing device senses when sludge moisture content is in 70%～40% scope, described control device control desiccation apparatus stops the mummification to mud.It is pointed out that and to adopt the water content of any suitable technology (for example heating evaporation, mechanical dehydration, airing, interpolation auxiliary material, hydrolysis or pyrolysis installation with and arbitrary combination mode) sludge drying to 70%～40%.Described mud can be the mud of any kind, for example can be city dehydrated sludge and industrial dewatered sludge (as paper mill sludge, printing and dyeing sludge etc.).It is pointed out that if do not particularly point out the moisture in the term in the literary composition " mud " does not comprise can be through the free state water of gravitational settling and mechanical effect removal.Method of the present utility model can also be applicable to, domestic sludge, petrochemical sludge, leather mud and other chemical engineering sludge.
The device that described wet mud is carried out mummification can comprise: (advantage: speed is fast for heating and evaporating unit; The energy consumption height), mechanical dehydration device (advantage: the efficient of when high-moisture percentage, anhydrating high shortcoming:, but can only obtain higher water ratio, for example, be difficult to realize the water ratio below 60% usually), (advantage: energy consumption is low, is particularly suited for using under dry and hot environment for drying device; But time efficiency is low), (advantage: speed is fast for adjuvant adding device; The cost height), hydrolysis device and/or pyrolysis installation (advantage: have the high efficient of anhydrating when water ratio is low, the shortcoming cost is higher) or the like shortcoming:.Thereby with the mummification of efficient manner realization to mud.
The dried equipment method of described mud is brought following advantage: on the one hand, in drying process, only the moisture of easy removal is removed, improved Energy efficiency and time efficiency that sludge water content is removed.On the other hand, described water content setting is also eliminated or has been alleviated the potential safety hazard of blasting easily in the mud drying process at least greatly.
More specifically, water content by mud to be burnt (through dewatered sludge) is set to 70%～40% (the mummification target of mummification step in other words is set to 70%～40% water content), on the one hand, in drying process, only the moisture of easy removal is removed, improved the energy consumption efficient and the time efficiency of moisture removal, promptly removed more water with less energy and the time of lacking.For example, during drying machine (mud being carried out the equipment of mummification) operation, consume energy such as electric energy.(target water content is 75%～40%) removed energy that the unit water yield consumed and is approximately when carrying out half-driedization catabiotic 1/2 when carrying out shallow mummification.And same equipment yield (through dewatered sludge) but can improve 1.2～1.5 times.On the other hand, described water content (70%～40%) makes mud need not to mix burning with other fuel when burning, but can directly burn, this also helps the saving of the energy, also help the reduction of the cost of investment of sludge incineration treatment facility, investment and maintenance cost that for example can the fuel economy transportation equipment.
It is pointed out that also described water content setting also eliminates or alleviated the potential safety hazard of blasting easily in the existing sludge incineration equipment at least greatly.As previously mentioned, sludge drying method of the prior art is about 35% or lower with sludge drying to water ratio.Carry out subsequent disposal or utilization then, for example carry out burning disposal.The design people notices: along with the raising of sludge drying degree, more and more be easy to produce combustible dust, thereby the possibility of blasting increases sharply, must take enough measures for the prevention of explosion to ensure safety in production.Especially when mud carries out absolutely dryization and half-driedization, be very easy to produce combustible dust, when mud is carried out shallow mummification, then seldom produce combustible dust usually.Therefore, the target water content of mummification is set to 70%～40%, also help drying process safety carry out.
Below in conjunction with accompanying drawing an embodiment of the present utility model is described.As shown in fig. 1, the sludge incineration method according to the utility model one embodiment comprises two steps: 1) wet mud is carried out mummification (in other words, carrying out shallow mummification); And 2) to burning of obtaining in the step 1) through dewatered sludge.Step 1) is the indicated step of number in the figure 2, step 2) be the indicated steps of numbering 3 among the figure.In step 1), be to be in 70%～40% the scope of sludge quality with wet sludge anhydration to its water content of back.What number in the figure 1 was indicated is the point of beginning of sludge incineration method of the present utility model, promptly wet mud.
As previously mentioned, the water content of mud is very high, even the water ratio of mud is also still very high after mechanical dehydration is handled, generally at 75%-85%.Obviously, the direct burning of mud is infeasible.At present, topmost burning mode has two kinds.First kind of mode is mud to be mixed together with other fuel burn, and its shortcoming is: need special fuel transport and plenum system, and, the amount of required fuel is bigger, the transportation cost height, and fuel consumption causes very high cost, and mud handling capacity is restricted.The second way is that (moisture percentage in sewage sludge is about 35% or lower after the mummification) behind the sludge drying burned again, and its shortcoming is: blast easily in drying process, be easy to generate dust pollution, and the more heat of mummification consumption, the mummification cost is too high.
Burning through dewatered sludge mainly can be carried out in incinerator or boiler (being to burn in boiler shown in the figure), in the burning process of mud, combustiblecomponents in the mud can produce heat, moisture in the mud then can absorb heat, water ratio is high more, heat production is few more, and it is many more to absorb heat, and the difference of the heat of generation and the heat of absorption is the clean quantity of heat given up of mud.For the butt calorific value is the mud of 3000kcal/kg, when water ratio is 75%, is the calorific value trim point; When water ratio was 60%, the burning of mud per ton contribution calorific value was 530,000 kcal; When water ratio was 50%, the burning of mud per ton contribution calorific value was 910,000 kcal; When water ratio was 40%, the burning of mud per ton contribution calorific value was 1,290,000 kcal.Can also draw thus, when water ratio was lower than 75%, mud can burn voluntarily, rather than must mix burning with coal or other fuel.The utility model is chosen as and is no more than 70%, is beneficial to the carrying out of sludge incineration.
Incinerator or the boiler wet mud that both can directly burn, the mud of half-driedization, absolutely dryization of also can burning.The temperature of sludge incineration is arranged on about about 1300 ℃ usually, and this helps the stable burning of mud on the one hand, on the other hand, helps the decomposition of obnoxious flavour.When the clean quantity of heat given up of mud is not enough to keep the incendiary temperature, must mixes and burn a certain proportion of other fuel.The clean quantity of heat given up of mud is high more, and it is low more to mix the ratio of burning other fuel, if whole burning sludges in the stove, when moisture percentage in sewage sludge 65% when above, furnace temperature can be reduced to below 900 ℃.If with the coal multifuel combustion, the mud ratio in 30% is added the shallow dewatered sludge of water ratio between 70%～40%, and it is no problem keeping enough furnace temperature.The ratio of mixing burning is few more, and the economy of sludge incineration is good more, considers the thermo-efficiency of boiler, and the cost of drying sludge, in a preferred embodiment of the present utility model, drying sludge to water ratio 50%～60% is burnt to it again.Described water content makes mud the time need not to mix burning with other fuel in burning, but can directly burn, and the saving that this also helps the energy also helps the reduction of the cost of investment of sludge incineration treatment facility.
In the method according to a preferred embodiment, the heat that burning sludge produces partly or entirely is used for wet mud is carried out preheating and/or mummification.Thereby can realize burning the recovery of the heat that produces, with further conserve energy.
The utility model also provides a kind of sludge incineration equipment, and described equipment comprises: mummification equipment is used for wet sludge anhydration to water content is in 70%～40% the scope; And burning facility, its be arranged on mummification equipment near, be used for the dewatered sludge after described mummification is equipment dried is burned.Thereby described equipment carries out burning disposal in the few and safe mode of energy consumption to mud.Described burning facility for example is incinerator or boiler.
The utility model also provides a kind of heat power plant that comprises above-mentioned sludge incineration equipment, and a kind of system that the mud output is arranged (for example, sewage work, paper mill, printing and dyeing mill or plant etc.) that adopts above-mentioned sludge drying equipment.Thereby the drying and other treatment that mud is optimized in the few and safe mode of energy consumption.
The utility model also provides a kind of sludge incineration factory, it comprises sludge drying equipment and boiler, mud is earlier after the shallow mummification of sludge drying equipment, be delivered to boiler and burn, burn the part or all of heat that produces and directly and/or indirectly conduct to mummification or the preheating that sludge drying equipment is used for mud.Described sludge incineration factory can comprise heat power plant, power station, sewage-farm, sewage work, paper mill, printing and dyeing mill, plant etc.The combustion equipment of described shallow dewatered sludge can comprise thermal source boiler, incinerator.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model, any those skilled in the art, in not breaking away from the technical solutions of the utility model 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 solutions of the utility model, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.
Claims (5)
1. sludge drying equipment, it is characterized in that, comprise to mud carry out mummification desiccation apparatus, be arranged on the sensing apparatus and the control device that are used for the sensing sludge moisture content in the described desiccation apparatus, described control device is electrically connected with described sensing apparatus and described desiccation apparatus.
2. sludge drying equipment as claimed in claim 1 is characterized in that, described desiccation apparatus is heating evaporation desiccation apparatus, mechanical dehydration desiccation apparatus, airing desiccation apparatus, adjuvant adding device, hydrolysis desiccation apparatus and/or pyrolysis desiccation apparatus.
3. sludge incineration equipment, it is characterized in that, comprise as each described sludge drying equipment among the claim 1-2 and near the incinerator the sludge drying equipment as described in being arranged on, described incinerator is used for after mud is carried out drying and other treatment, to carrying out burning disposal through dewatered sludge.
4. sludge incineration equipment as claimed in claim 3, it is characterized in that, further comprise the heat circulation device, be used to guide the heat that burning sludge is produced partly or wholly to guide to described sludge drying equipment to be used for that mud is carried out described drying and other treatment.
5. sludge incineration equipment as claimed in claim 3 is characterized in that, described incinerator is incinerator or boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010291660291U CN201793466U (en) | 2010-02-03 | 2010-02-03 | Sludge anhydration device and corresponding sludge combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010291660291U CN201793466U (en) | 2010-02-03 | 2010-02-03 | Sludge anhydration device and corresponding sludge combustion device |
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| Publication Number | Publication Date |
|---|---|
| CN201793466U true CN201793466U (en) | 2011-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010291660291U Expired - Lifetime CN201793466U (en) | 2010-02-03 | 2010-02-03 | Sludge anhydration device and corresponding sludge combustion device |
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| Country | Link |
|---|---|
| CN (1) | CN201793466U (en) |
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2010
- 2010-02-03 CN CN2010291660291U patent/CN201793466U/en not_active Expired - Lifetime
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Granted publication date: 20110413 |