CN102211845B - Sludge treatment and disposal system and method - Google Patents
Sludge treatment and disposal system and method Download PDFInfo
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- CN102211845B CN102211845B CN 201010141714 CN201010141714A CN102211845B CN 102211845 B CN102211845 B CN 102211845B CN 201010141714 CN201010141714 CN 201010141714 CN 201010141714 A CN201010141714 A CN 201010141714A CN 102211845 B CN102211845 B CN 102211845B
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- 239000010802 sludge Substances 0.000 title claims abstract description 159
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000428 dust Substances 0.000 claims abstract description 33
- 239000002912 waste gas Substances 0.000 claims abstract description 17
- 239000007787 solid Substances 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 33
- 238000001035 drying Methods 0.000 claims description 33
- 239000003546 flue gas Substances 0.000 claims description 33
- 239000007789 gas Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 239000002817 coal dust Substances 0.000 claims description 7
- 239000002918 waste heat Substances 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 230000001877 deodorizing effect Effects 0.000 claims description 6
- 239000012716 precipitator Substances 0.000 claims description 5
- 239000010801 sewage sludge Substances 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 230000026676 system process Effects 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 11
- 239000002699 waste material Substances 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000000446 fuel Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003380 propellant Substances 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 208000016261 weight loss Diseases 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
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Abstract
The invention discloses a sludge treatment and disposal system, which is used for conveying dewatered sludge discharged by a sludge plant to a coal fired power plant to be combusted in a blended way after the dewatered sludge is dried. The sludge treatment and disposal system comprises a wet sludge storage bin, a sludge dryer, a sludge feeding pump, a cyclone dust collector, a dried sludge storage bin, dried sludge conveying equipment and a draught fan. The sludge feeding pump is respectively connected with the wet sludge storage bin and the sludge dryer. The cyclone dust collector is communicated with the sludge dryer so as to perform gas-solid separation on dried sludge and waste gas of the dryer. The dried sludge storage bin is connected with the cyclone dust collector so as to receive the separated dried sludge. The dried sludge conveying equipment is connected with the dried sludge storage bin and used for conveying the dried sludge to a coaling system of the coal fired power plant. The draught fan is connected with a waste gas hole of the cyclone dust collector. According to the sludge treatment and disposal system disclosed by the invention, the sludge treatment and disposal cost can be effectively reduced; vast high-quality resources can be saved; and a way of using waste to treat waste is realized. The invention further discloses a sludge treatment and disposal method.
Description
Technical field
The present invention relates to solid waste disposal category in field of Environment Protection, specifically relate to a kind of processing disposal system of mud and adopt this system to carry out the method for ﹠ Mud.
Background technology
Mud is the inevitable outcome of municipal sewage plant's sewage disposal, enormous amount, and complicated component be difficult to process, and the sludge disposal expense is also larger.The purpose of sludge treatment is to reach minimizing, stabilization, innoxious and resource utilization, and the method for sludge treatment of comparative maturity has landfill, compost and burning etc.
Burning is the at high temperature fully burning of combustiblecomponents that makes in mud, finally becomes stable lime-ash.Burning method have subtract appearance, weight-loss ratio is high, processing speed is fast, and is innoxious more thorough, waste heat can be used for generating or the advantage such as heat supply.The main purpose of burning is incinerating waste material as much as possible, makes the material that is burned innoxious and subtract to greatest extent appearance, and reduces new pollutent generation as far as possible, avoids causing secondary pollution.In recent years, burning method has adopted suitable pretreatment technology and advanced incinerating method, has reached the self-sustaining of sludge heat energy, and can satisfy more and more stricter environmental requirement, has obtained a large amount of utilizations in developed country especially Japan and Europe.But sludge incineration need be built complete thermal source, drying facility, burning facility and vent gas treatment facility, also need replenish a large amount of high-grade fuels during operation, and capital construction and working cost are high, is difficult to direct implementation in China.
Mud multifuel combustion in existing boiler of power plant is a kind of implementation that sludge incineration is disposed, boiler of power plant is disposed waste and is belonged to the multifuel combustion category, have abroad special law to be administered, and the consumer waste incineration standard is quoted in still not similarly legislation of China more in practice.The heat power plant of some provinces and cities of China has adopted the sludge treating method of mud and the generating of coal multifuel combustion, and this processing disposal options economy and technical feasibility also receive much concern and dispute on.
The subject matter of arguement mainly concentrates on the water ratio of mud and adding rate has considerable influence to the thermo-efficiency of burning boiler, moisture percentage in sewage sludge is higher, calorific value is lower, hot contribution rate is less, the mud of 80% water ratio is very low to the hot contribution rate of generating, directly the utilization rate of heat value of deodorization by incineration sewage sludge is extremely low, not only can not utilize organic calorific value in mud, also need replenish a large amount of high-grade fuels as ignition dope.Dewatered sludge water ratio high (75%～85%), viscosity is large, be the viscous semi-fluid condition, for the injection that guarantees mud evenly, with the coal dust good mixing effect, the position of nozzle, form, quantity and material need be done deep research, and also need to pay attention to cleaning, replacing and the maintenance of nozzle in routine maintenance.In addition, that adopts at present that dewatered sludge directly mixes burning mostly is the small-sized fluidized bed boiler, and furnace temperature is lower than large coal fired boilers, pollutent might occur and burn not exclusively, and the situation of secondary pollution occurs, and this is also directly to mix to burn the dewatered sludge problem demanding prompt solution.
Summary of the invention
The present invention is intended to solve at least one of technical problem that exists in prior art.For this reason, one object of the present invention is to propose a kind of mummification-mix the ﹠ Mud system of burning, and this system utilizes the dewatered sludge of the waste heat mummification Sewage Plant of power-plant flue gas, and the mud after mummification is sent into boiler of power plant and the mixed burning of mixing of coal dust.
Sending into the coal-burning power plant after the dewatered sludge mummification that the ﹠ Mud system of first embodiment according to the invention, described ﹠ Mud system are used for mud factory is discharged mixes and burns and comprise: the wet warehouse of sludge of the dewatered sludge that storage mud factory discharges; By the sludge drying device of flue gas with the dewatered sludge mummification; Advance dredge pump, described advance dredge pump be connected with the sludge drying device with described wet warehouse of sludge respectively, so that the dewatered sludge in described wet warehouse of sludge is sent in described sludge drying device; Tornado dust collector, described tornado dust collector are communicated with described sludge drying device with the dewatered sludge after mummification and sludge drying device waste gas gas solid separation; Dewatered sludge warehouse, described dewatered sludge warehouse are connected to receive isolated dewatered sludge in tornado dust collector with described tornado dust collector; The dewatered sludge handling equipment, described dewatered sludge handling equipment is connected dewatered sludge to be conveyed into the coaling system of coal-burning power plant with described dewatered sludge warehouse; And induced draft fan, described induced draft fan is connected with the waste gas outlet of described tornado dust collector and enters the flue gas system of coal-burning power plant in order to process with the waste gas with described tornado dust collector.
In addition, the ﹠ Mud system of first embodiment according to the invention also has following additional technical feature:
Described wet warehouse of sludge is closed, and comprises the exhaust ventilation system.
Describedly advance dredge pump and adopt spiral pump or ram pump.
Described sludge drying device is that vane is strengthened the convection current sludge drier.
Described flue gas is to extract before the flue gas of coal-burning power plant enters air preheater, and flue-gas temperature is 300～400 °, and the extraction amount is less than 10% of the amount of flue gas emission that enters air preheater.
The induced draft fan flue gas system that enters the coal-burning power plant with the waste gas that tornado dust collector are discharged that is suitable for being connected with the electric precipitator of coal-burning power plant is processed.
Described dewatered sludge handling equipment is the dewatered sludge conveying and metering equipment of the mud after measurable mummification.
Described ﹠ Mud system further comprises the biological deodorizing unit for the treatment of the foul smell in wet warehouse of sludge and sludge drying workshop.
According to ﹠ Mud of the present invention system, after utilizing the higher dewatered sludge of power plant flue gas heat drying water ratio, directly mix burning in boiler of power plant, like this, can effectively reduce the cost of ﹠ Mud and save a large amount of high-grade energies, having realized the treatment of wastes with processes of wastes against one another.In addition, also do not need boiler of power plant is transformed, and can operation and the smoke processing system of boiler of power plant do not had a negative impact.
Another object of the present invention is to propose a kind of mummification-mix ﹠ Mud method of burning.
﹠ Mud method according to second embodiment of the invention comprises the steps:
(1) dewatered sludge of mud factory is sent into wet warehouse of sludge;
(2) by advancing dredge pump, dewatered sludge is sent into the sludge drying device, the waste heat that utilizes flue gas carries out mummification with dewatered sludge and obtains the mud of mummification;
(3) make the mud of mummification enter tornado dust collector with exhaust gas of dryer and carry out gas solid separation;
(4) extract the waste gas of tornado dust collector out by induced draft fan, and waste gas is entered the power-plant flue gas treatment system process;
(5) mud after isolated mummification in tornado dust collector being sent into the dewatered sludge warehouse keeps in; With
(6) dewatered sludge is sent into the coaling system of boiler of power plant, and entered coal-fired boiler combustion after coal dust mixes.
Described ﹠ Mud method further comprises: discharge after the processing of the foul smell that produces during will wet sewage sludge storage and sludge drying through the biological deodorizing unit.
According to ﹠ Mud method of the present invention, utilize the dewatered sludge mummification that water ratio is high of the high-temperature flue gas waste heat of power plant to the lower dewatered sludge of water ratio, save a large amount of capital construction costs and high-grade energy with respect to the mummification mode of household heat source, can effectively reduce the sludge drying cost.Mix with boiler smoke before the wet flue gas that mummification produces sends back to power plant's electric precipitator by blower fan, utilize the original dedusting of power plant-desulphurization system purifying treatment, also can effectively reduce the environmental protection cost.Dewatered sludge in propellant combination proportion lower than 5%, very little on the impact of boiler thermal output.In addition, dewatered sludge is the earthy solid, can directly enter power plant's mixed coal, coal mill system, and not need boiler body is transformed.
The ﹠ Mud system and method according to the present invention, can adopt dewatered sludge Substitute For Partial fire coal as the fuel of boiler of power plant in the situation that do not affect existing unit operation, thereby reach the purpose that turns waste into wealth, started the win-win situation that not only solves problem of environmental pollution but also can reclaim biomass energy, can effectively solve municipal sludge and dispose difficult present situation.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 is the schematic diagram of ﹠ Mud according to an embodiment of the invention system; With
Fig. 2 is ﹠ Mud method according to an embodiment of the invention.
Embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, term " on ", orientation or the position relationship of the indication such as D score be based on orientation shown in the drawings or position relationship, be only the present invention for convenience of description rather than require the present invention with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
Below with reference to ﹠ Mud system and the ﹠ Mud method of Fig. 1 description according to the embodiment of the present invention.
As shown in Figure 1, ﹠ Mud system according to an embodiment of the invention, send into the coal-burning power plant after the dewatered sludge mummification that is used for mud factory is discharged and mix burning, comprising: wet warehouse of sludge 1, sludge drying device 3, advance dredge pump 2, tornado dust collector 4, dewatered sludge warehouse 5, dewatered sludge handling equipment 6 and induced draft fan 8.
The dewatered sludge that the wet interior storage mud of warehouse of sludge 1 factory discharges.In one embodiment of the invention, wet warehouse of sludge 1 is enclosed, and comprises the exhaust ventilation system, and its required storage volumes is the mud handling capacity of 2～4 days.
With the dewatered sludge mummification, alternatively, sludge drying device 3 is that vane strengthens the convection current sludge drier to sludge drying device 3 by high-temperature flue gas, can be the water ratio of 70～85% sludge drying to 10～30% as required with water ratio.Wherein, high-temperature flue gas is to extract before the flue gas of coal-burning power plant enters air preheater, and flue-gas temperature is 300～400 °, and the extraction amount is less than 10% of the amount of flue gas emission that enters air preheater.
Advance dredge pump 2 and be connected with sludge drying device 3 with wet warehouse of sludge 1 respectively, send in sludge drying device 3 for the dewatered sludge of the warehouse of sludge 1 that will wet.Particularly, advance dredge pump 2 and adopt spiral pump or ram pumps, wherein, the short or resistance of transmitting range hour adopts spiral pump, and long distance or resistance adopt ram pump when large.
Tornado dust collector 4 are communicated with sludge drying device 3, are used for the dewatered sludge after mummification and exhaust gas of dryer gas solid separation.
Dewatered sludge warehouse 5 is connected with tornado dust collector 4, in order to receive isolated dewatered sludge and temporary in tornado dust collector 4.And dewatered sludge handling equipment 6 is connected with dewatered sludge warehouse 5, is used for dewatered sludge is conveyed into the coaling system 9 of coal-burning power plant, and the blending ratio of mud and coal dust was less than 1: 20.Particularly, dewatered sludge handling equipment 6 is the dewatered sludge conveying and metering equipment of the mud after measurable mummification, and alternatively, dewatered sludge conveying and metering equipment can adopt the belt metering outfit.
The exhaust outlet of tornado dust collector 4 is connected with induced draft fan 8, and induced draft fan 8 is suitable for being connected with the electric precipitator of coal-burning power plant, the waste gas of discharging in tornado dust collector 4 can be entered the flue gas system of coal-burning power plant in order to process.
In an example of the present invention, the ﹠ Mud system also further comprises biological deodorizing unit 7, the foul smell that produces for the treatment of wet warehouse of sludge 1 and sludge drying device 3.
According to ﹠ Mud of the present invention system, after utilizing the higher dewatered sludge of power plant flue gas heat drying water ratio, directly mix burning in boiler of power plant, like this, can effectively reduce the cost of ﹠ Mud and save a large amount of high-grade energies, having realized the treatment of wastes with processes of wastes against one another.In addition, also do not need boiler of power plant is transformed, and can operation and the smoke processing system of boiler of power plant do not had a negative impact.
Describe ﹠ Mud method according to the embodiment of the present invention below with reference to Fig. 2, described ﹠ Mud method can adopt above-mentioned ﹠ Mud system to carry out, and comprises the steps:
(1) dewatered sludge of mud factory is sent into wet warehouse of sludge 1.
(2) by advancing dredge pump 2, dewatered sludge is sent into sludge drying device 3, the waste heat by flue gas carries out with dewatered sludge the mud that mummification obtains mummification.
(3) mud of mummification enters tornado dust collector 4 with exhaust gas of dryer and carries out gas solid separation.
(4) waste gas of tornado dust collector 4 is extracted out by induced draft fan 8, is suitable for that waste gas is entered the power-plant flue gas treatment system and processes.
(5) mud after isolated mummification in tornado dust collector 4 being sent into dewatered sludge warehouse 5 keeps in.
(6) dewatered sludge is sent into the coaling system 9 of boiler of power plant, be mixed into coal-fired boiler combustion with coal dust, in an example of the present invention, the blending ratio of mud and coal dust was less than 1: 20.
(7) will wet and be discharged in atmosphere after the processing through biological deodorizing unit 7 of foul smell that sewage sludge storage and sludge drying workshop produce.
According to ﹠ Mud method of the present invention, the high-temperature flue gas waste heat that utilizes power plant is with the dewatered sludge mummification of water ratio high (75%～85%) dewatered sludge to water ratio lower (20%～30%), save a large amount of capital construction costs and high-grade energy with respect to the mummification mode of household heat source, can effectively reduce the sludge drying cost.Mix with boiler smoke before the wet flue gas that mummification produces sends back to power plant's electric precipitator by blower fan, utilize the original dedusting of power plant-desulphurization system purifying treatment, also can effectively reduce the environmental protection cost.Dewatered sludge in propellant combination proportion lower than 5%, very little on the impact of boiler thermal output.In addition, dewatered sludge is the earthy solid, can directly enter power plant's mixed coal, coal mill system, and not need boiler body is transformed.Owing to adopting large coal fired boilers, therefore furnace temperature can effectively avoid the secondary pollution problem higher than 1350 ℃, and the dioxin that especially receives much concern can not generate under hot conditions substantially.
The ﹠ Mud system and method according to the present invention, can adopt dewatered sludge Substitute For Partial fire coal as the fuel of boiler of power plant in the situation that do not affect existing unit operation, thereby reach the purpose that turns waste into wealth, started the win-win situation that not only solves problem of environmental pollution but also can reclaim biomass energy, can effectively solve municipal sludge and dispose difficult present situation.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that do not break away from principle of the present invention and aim can be carried out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.
Claims (6)
1. a ﹠ Mud system, is characterized in that, sends into the coal-burning power plant after the dewatered sludge mummification that described ﹠ Mud system is used for mud factory is discharged and mix burning, and comprise:
The wet warehouse of sludge of the dewatered sludge that storage mud factory discharges, described wet warehouse of sludge is closed, and comprises the exhaust ventilation system, and its required storage volumes is the mud handling capacity of 2～4 days;
By the sludge drying device of flue gas with the dewatered sludge mummification, wherein said flue gas is to extract before the flue gas of coal-burning power plant enters air preheater, and flue-gas temperature is 300～400 ℃, and the extraction amount is less than 10% of the amount of flue gas emission that enters air preheater;
Advance dredge pump, described advance dredge pump be connected with the sludge drying device with described wet warehouse of sludge respectively, so that the dewatered sludge in described wet warehouse of sludge is sent in described sludge drying device;
Tornado dust collector, described tornado dust collector are communicated with described sludge drying device with the dewatered sludge after mummification and sludge drying device waste gas gas solid separation;
Dewatered sludge warehouse, described dewatered sludge warehouse are connected to receive isolated dewatered sludge in tornado dust collector with described tornado dust collector;
Dewatered sludge handling equipment, described dewatered sludge handling equipment are connected dewatered sludge to be conveyed into the coaling system of coal-burning power plant with described dewatered sludge warehouse, described dewatered sludge handling equipment is the dewatered sludge conveying and metering equipment of the mud after measurable mummification; And
Induced draft fan, described induced draft fan are connected with the waste gas outlet of described tornado dust collector and enter the flue gas system of coal-burning power plant in order to process with the waste gas with described tornado dust collector;
The biological deodorizing unit of the foul smell that produces for the treatment of wet warehouse of sludge and sludge drying device.
2. ﹠ Mud according to claim 1 system, is characterized in that, describedly advances dredge pump and adopt spiral pump or ram pump.
3. ﹠ Mud according to claim 1 system, is characterized in that, described sludge drying device is that vane is strengthened the convection type sludge drier.
4. ﹠ Mud according to claim 1 system, is characterized in that, the induced draft fan flue gas system that enters the coal-burning power plant with the waste gas that tornado dust collector are discharged that is suitable for being connected with the electric precipitator of coal-burning power plant is processed.
5. a ﹠ Mud method that adopts the ﹠ Mud system described in claim 1, is characterized in that, comprises the steps:
(1) dewatered sludge of mud factory is sent into wet warehouse of sludge;
(2) by advancing dredge pump, dewatered sludge is sent into the sludge drying device, the waste heat that utilizes flue gas carries out mummification with dewatered sludge and obtains the mud of mummification;
(3) make the mud of mummification enter tornado dust collector with exhaust gas of dryer and carry out gas solid separation;
(4) extract the waste gas of tornado dust collector out by induced draft fan, and waste gas is entered the power-plant flue gas treatment system process;
(5) mud after isolated mummification in tornado dust collector being sent into the dewatered sludge warehouse keeps in; With
(6) dewatered sludge is sent into the coaling system of coal-fired plant boiler, and entered coal-fired boiler combustion after coal dust mixes.
6. ﹠ Mud method according to claim 5, its feature exists, and further comprises:
To discharge after the processing of foul smell by the biological deodorizing unit that produce during wet sewage sludge storage and sludge drying.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010141714 CN102211845B (en) | 2010-04-08 | 2010-04-08 | Sludge treatment and disposal system and method |
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| CN 201010141714 CN102211845B (en) | 2010-04-08 | 2010-04-08 | Sludge treatment and disposal system and method |
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| CN102211845A CN102211845A (en) | 2011-10-12 |
| CN102211845B true CN102211845B (en) | 2013-05-22 |
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| CN101570388A (en) * | 2009-05-26 | 2009-11-04 | 华电滕州新源热电有限公司 | Harmless recycling treatment process for urban sludge |
| CN201670791U (en) * | 2010-04-08 | 2010-12-15 | 北京朗新明环保科技有限公司 | Sludge treatment system |
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2010
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101570388A (en) * | 2009-05-26 | 2009-11-04 | 华电滕州新源热电有限公司 | Harmless recycling treatment process for urban sludge |
| CN201670791U (en) * | 2010-04-08 | 2010-12-15 | 北京朗新明环保科技有限公司 | Sludge treatment system |
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