CN102351399B - Municipal sludge drying method - Google Patents
Municipal sludge drying method Download PDFInfo
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- CN102351399B CN102351399B CN 201110314282 CN201110314282A CN102351399B CN 102351399 B CN102351399 B CN 102351399B CN 201110314282 CN201110314282 CN 201110314282 CN 201110314282 A CN201110314282 A CN 201110314282A CN 102351399 B CN102351399 B CN 102351399B
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Abstract
The invention discloses a municipal sludge drying method, which is applicable to the treatment disposal of municipal dewatered sludge of municipal sewage treatment plants in combined use with electric plants. The method comprises the following flow processes of: (1) wet sludge drying flow process: pouring wet sludge to a wet sludge storage cabin through a sludge conveying vehicle, installing two double-spiral pre-pressing conveyors at the bottom of the sludge cabin and connecting a sludge pump under a material outlet of each double-spiral conveyor; (2) drying gas load flow process: sucking waste gas (steam) generated through the drying into a condenser, pumping and pressuring waste liquid after condensing, temperature reduction and dehumidification by a water pump, conveying the waste liquid to a sewage treatment system, simultaneously conveying defogged uncondensed gas and odor in the cabin into a boiler and carrying out burning decomposition at a high temperature; and (3) drying medium flow process: using the steam introduced from a low-pressure steam system of the electric plant as a heat source of a sludge drying system after the temperature reduction and pressure reduction.
Description
Technical field
The present invention relates to a kind of Novel sewage sludge drying method, particularly a kind of and power plant unites a kind of novel municipal sludge drying method of use.
Background technology
Along with the development in city, the status of environment protection is also with increasingly important.And increasing substantially of the sludge yield that causes along with the treatment rate of domestic sewage raising also makes the processing problem of mud more outstanding.
Mud also contains a large amount of pathogenic agent and detection device for multi metallic elements owing to containing concentrated inorganic, organic pollutant, therefore, must deal carefully with mud.Sludge treatment will be carried out degree of depth harmless treatment to mud exactly, thoroughly solves mud to the pollution of environment and to the mankind's harm.Can make sewage sludge reach the purpose of minimizing, innoxious, resource utilization by the ﹠ Mud method.
The municipal sludge that the city is effluxed carries out advanced treatment and is developed as the second energy resource and just seem particularly important, especially in force how to take ﹠ Mud scheme effective, reasonable low consumption, must bring increase income, the benefit such as throttling, environmental protection, economy and society.Make municipal sludge obtain the utilization of effectively processing and resource utilization, the sludge drying link is inevitably, is important step, the gordian technique of ﹠ Mud, and carrying out drying sludge or burning is the inevitable choice of sludge treatment development.
Summary of the invention
Be to solve the ﹠ Mud problem, the invention provides the Novel sewage sludge drying method that a kind of and power plant unite use, the processing that is applicable to municipal sludge is disposed.
The present invention is achieved by the following technical solutions, comprising:
(1) wet sludge anhydration flow process: wet mud is poured onto wet warehouse of sludge by the mud transport trolley, the sludge bin bottom arranges two duplex precompressed transfer rollers and is used for the wet mud of output, connect sludge pump under every two-screw conveyer discharge port, after wet mud pressurizes through sludge pump, be delivered to sludge drying machine by pipeline and carry out drying and other treatment, after dry, product is discharged by the mud discharge port of sludge drying machine, delivers to boiler of power plant through rotary conveyor and carries out incineration disposal;
(2) mummification carrier gas flow process: the waste gas (vapour) that mummification produces, most of moisture from mud self is volatile gases on a small quantity; Waste gas (vapour) is sucked up to condenser, and the waste liquid after the condensation cool-down dehumidification is delivered to Sewage treatment systems after water pump suction pressurization; Not the non-condensable gases of water-soluble treatment system after demist with the storehouse in foul smell together send in boiler of power plant, at high temperature burn decomposition; Mud after mummification is sent into boiler of power plant, high temperature incineration in the boiler furnace after being not more than 5% ratio and coal-fired blending;
(3) mummification medium flow process: as the thermal source of municipal sludge drying system, process and up to standardly carry out recycle as water coolant afterwards by the former water system of steam condenses access power plant after the pressure and temperature reducing process for the steam that attracts from power plant's steam vapour system after boiler Boiler Steam generating.To wet mud through mummification to water ratio≤30%.
Beneficial effect of the present invention is: utilize steam that coal firing boiler produces as thermal source, the mud that will wet through mummification to water ratio≤30%.The incondensable gas that produces in disposal process is delivered to coal-fired boiler combustion through after cool-down dehumidification, mud after mummification is sent into boiler after being not more than 5% ratio and coal-fired blending, by 1500-1600 ℃ of high temperature incineration, reduced to greatest extent the pollution that foul smell produces, both bacterium entrained in mud and virus can be fully and completely eliminated, heavy metal passivation in mud and decentralized can be made again; The lime-ash that produces and the coal-fired flyash that produces together carry out the building materials processing, stop the generation of secondary pollution; The flue gas that produces in burning process and flying dust are able to qualified discharge by the perfect dedusting of power plant and desulfurization removing nitric system, thereby realize harmless treatment.
Description of drawings
Fig. 1 is technical process figure of the present invention.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
The mud that will wet is poured onto wet warehouse of sludge by the mud transport trolley.Wet warehouse of sludge top is semi-closure half opening device, dump complete, storehouse lid autoshutdown.The sludge bin that wets top arranges sieve plate and prevents that the bulk foreign matter from entering feed bin, sets simultaneously hermatic door above warehouse and is used for preventing the peculiar smell effusion, and be equipped with gas detection, collection and stench processing system.
The sludge bin bottom arranges two duplex precompressed transfer rollers and is used for the wet mud of output, connect sludge pump under every two-screw conveyer discharge port, wet mud through the sludge pump pressurization after, by pipeline be delivered to flow control valve continuously, the sewage sludge feed bucket before sludge drying machine of entering that average rate, volume are constant sends into sludge dryer by screw mud reclaimer and carries out drying and other treatment.
Drying equipment adopts indirect contact formula heat drying equipment---paddle-dryer.Utilize high-temperature steam to be thermal source, in sludge dryer, heating medium enters drying machine blade spindle inner chamber, and the blade spindle heating is carried out heat drying in the mode of conduction heating to mud.The mud that is dried is sent into the charging opening of drying machine continuously by the spiral reclaimer, mud enters device after one's death, and the rotation by blade is stirred the mud upset, fully heats mud, thereby makes the contained moisture evaporation of mud.Mud is carried to the discharge port direction with blade rotary, continues to stir in conveying, makes the moisture content that oozes out in mud continue evaporation.The qualified product of uniform drying are discharged by the mud discharge port after treatment.Simultaneously, the waste gas of generation is made a gift to someone, and gas collection is female manages; The former water system of steam condenses access power plant is processed and is up to standardly carried out recycle as water coolant afterwards.The relative correspondence of drying time and vapor temperature scope can make the water ratio of mud be down to below 30% by 80%.
The waste gas that produces in the sludge drying machine drying process (vapour), most of moisture from mud self is volatile gases on a small quantity.Waste gas (vapour) is sucked up to condenser, and the waste liquid that is condensed into after the condenser cool-down dehumidification drains into the waste water tank that temporarily condenses, and delivers to Sewage treatment systems after water pump suction pressurization; Non-condensable gases enters boiler primary air fan intake system after demist, in boiler fan is sent into boiler, at high temperature burn decomposition.
Semi-oriented sludge product lower than 30% water ratio, deliver on power plant's fortune coal gallery coal conveyer belt by the closed lifting machine, measure and control well upper mud speed by special measuring star-wheel device, make dewatered sludge and coal evenly be blended into propellant combination in≤5% ratio and the coal pulverizer of making a gift to someone is milled, act as a fuel and send into boiler furnace and carry out burning disposal.The flue gas that produces in burning process and flying dust are able to qualified discharge by the perfect dedusting of power plant and desulfurization removing nitric system.
Claims (1)
1. a municipal sludge drying method, is characterized in that comprising the steps:
(1) wet sludge anhydration flow process: wet mud is poured onto wet warehouse of sludge by the mud transport trolley, wet warehouse of sludge top arranges sieve plate and prevents that the bulk foreign matter from entering feed bin, set simultaneously hermatic door above wet warehouse of sludge warehouse and be used for preventing the peculiar smell effusion, wet warehouse of sludge bottom arranges two duplex precompressed transfer rollers and is used for the wet mud of output, connect sludge pump under every duplex precompressed transfer roller discharge port, after wet mud pressurizes through sludge pump, be delivered to sewage sludge feed bucket before sludge drying machine by pipeline, send into sludge drying machine by screw mud reclaimer and carry out drying and other treatment, after dry, product is discharged by the mud discharge port, deliver to boiler of power plant through rotary conveyor and carry out incineration disposal, the relative correspondence of drying time and vapor temperature scope makes the water ratio of mud be down to below 30% by 80%,
(2) mummification carrier gas flow process: the waste gas that mummification produces, most of moisture from mud self is volatile gases on a small quantity; Waste gas is sucked up to condenser, and the waste liquid after the condensation cool-down dehumidification is delivered to Sewage treatment systems after water pump suction pressurization; Not the non-condensable gases of water-soluble treatment system after demist with the storehouse in foul smell together send in boiler, at high temperature burn decomposition;
(3) mummification medium flow process: as the thermal source of municipal sludge drying system, the former water system of steam condenses access power plant is up to standard to be recycled as water coolant the steam that attracts from power plant's steam vapour system afterwards after the pressure and temperature reducing process;
(4) lower than the semi-oriented sludge product of 30% water ratio, deliver on power plant's fortune coal gallery coal conveyer belt by the closed lifting machine, make dewatered sludge and coal evenly be blended into propellant combination and send into coal pulverizer and mill in≤5% ratio, act as a fuel and send into boiler furnace and carry out burning disposal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110314282 CN102351399B (en) | 2011-10-17 | 2011-10-17 | Municipal sludge drying method |
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| CN 201110314282 CN102351399B (en) | 2011-10-17 | 2011-10-17 | Municipal sludge drying method |
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| CN102351399A CN102351399A (en) | 2012-02-15 |
| CN102351399B true CN102351399B (en) | 2013-05-22 |
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Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102730916B (en) * | 2012-06-01 | 2014-08-27 | 南京国能环保工程有限公司 | Treatment process of in-depth dehydration and resource utilization for sludge |
| CN102730391B (en) * | 2012-06-08 | 2015-09-09 | 深圳市如茵生态环境建设有限公司 | Squash type sludge conveyer and biological dewatered system |
| CN102976572A (en) * | 2012-11-28 | 2013-03-20 | 苏州市君悦新材料科技有限公司 | New method for sludge treatment |
| CN105347654B (en) * | 2015-11-02 | 2018-04-03 | 台州市鹿通电镀有限公司 | The furnace drying method and its dryer of a kind of sludge |
| CN106430903A (en) * | 2016-11-30 | 2017-02-22 | 中冶华天南京工程技术有限公司 | Sludge steam drying and incineration method and system |
| CN107082552A (en) * | 2017-07-02 | 2017-08-22 | 苏州富特尼水务工程有限公司 | A kind of low temperature dewatered sludge processing unit |
| CN109293212A (en) * | 2018-10-18 | 2019-02-01 | 南京龙源环保有限公司 | The joint processing system and processing method of municipal sludge and desulfurization wastewater |
| CN109608001A (en) * | 2018-12-18 | 2019-04-12 | 宁波富仕达电力工程有限责任公司 | Sludge drying system |
| CN109838796A (en) * | 2019-03-21 | 2019-06-04 | 西安西热锅炉环保工程有限公司 | A kind of thermal power plant's burning mixed mud removes stench system |
| CN111533425A (en) * | 2020-05-25 | 2020-08-14 | 国惠环保新能源有限公司 | Sludge drying machine exhaust steam treatment system and method |
| CN112456752A (en) * | 2020-11-16 | 2021-03-09 | 中国能源建设集团山西省电力勘测设计院有限公司 | Direct sludge drying treatment method based on existing equipment of thermal power plant |
| CN112960993B (en) * | 2021-02-26 | 2022-09-02 | 天津凯英科技发展股份有限公司 | Comprehensive treatment method of solid waste |
| CN113501626B (en) * | 2021-08-04 | 2022-08-26 | 马宁 | Be used for landfill leachate treatment facility |
| CN113739532A (en) * | 2021-09-14 | 2021-12-03 | 西安热工研究院有限公司 | Wet material drying system capable of efficiently utilizing waste heat of combustible waste gas |
| CN114230122A (en) * | 2021-12-15 | 2022-03-25 | 山东尚科环境工程有限公司 | High-temperature and low-temperature drying comprehensive treatment method for papermaking sludge |
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| CN101216177A (en) * | 2008-01-09 | 2008-07-09 | 浙江大学 | Method for burning and processing sludge using generating plant pulverized coal boiler system |
| 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 |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216177A (en) * | 2008-01-09 | 2008-07-09 | 浙江大学 | Method for burning and processing sludge using generating plant pulverized coal boiler system |
| 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 |
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Address after: No.23, Liuzhou North Road, Jiangbei new district, Nanjing, Jiangsu Province, 211500 Patentee after: Nanjing Zhongdian environmental protection water Co., Ltd Address before: 211048 hi tech Development Zone, Pukou District, Jiangsu, Nanjing 03-420 Patentee before: NANJING GUONENG ENVIRO-PROTECTION PROJECT Co.,Ltd. |
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