CN102964047B - Treatment method of sludge drying - Google Patents
Treatment method of sludge drying Download PDFInfo
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- CN102964047B CN102964047B CN201210253428.8A CN201210253428A CN102964047B CN 102964047 B CN102964047 B CN 102964047B CN 201210253428 A CN201210253428 A CN 201210253428A CN 102964047 B CN102964047 B CN 102964047B
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Abstract
The invention relates to a treatment method of sludge drying. The method consists of: metering wet sludge from a sewage treatment plant and sending it into a wet sludge stock bin for storage; sending the sludge in the wet sludge stock bin into a dryer to conduct continuous drying, thus decreasing the water content of dried sludge from 80% to 25-35%; bringing dried particles and gas into a cyclone separator, separating the solids from the gas by density difference, collecting the sludge particles at the bottom and discharging them by a rotary valve, sending the sludge particles into a cement kiln to perform burning; and sending the gas containing water vapor and a small amount of superfine solid particles into a bag type dust collector, reheating the filtered gas and vapor by a heater and returning them to the starting end of the dryer, leaving the rest vapor to enter a condensing tower to cool, and sending cooled wastewater to a sewage treatment unit. The invention has the advantages that: the heat source comes from the cement kiln, the heat drying equipment has high heat conversion efficiency, the dried sludge is directly transported into the cement kiln to burn, and the heat released from dried sludge combustion can replace part of fuel coal, thus realizing energy recovery and no secondary pollution.
Description
Technical field
The present invention relates to a kind for the treatment of process of sludge drying, the high-temperature gas that it utilizes cement kiln to produce is as the thermal source of sludge drying, and the mud after mummification burns in decomposing furnace can Substitute For Partial fuel.
Background technology
Mud after city domestic sewage process, general water ratio about 80%, is rich in the nutritive ingredients such as organic, and again containing objectionable impuritiess such as a certain amount of heavy metal and virus, pathogenic agent, parasitic ovums, the improper meeting of sludge disposal causes serious secondary environmental pollution.The method of disposal that external mud is main is at present landfill, burns, fills out sea and field application, European and American countries is landfill and farmland utilization mainly, the mud of Japan's marine reclamation land accounts for more than 70%, the main whereabouts of the sewage plant sludge of current China is refuse landfill, along with improving constantly of wastewater treatment rate, the a large amount of output of mud brings great burden to refuse landfill, shorten working life, and then cause impact again to treatment of urban garbage, and the place of suitable landfill is made to seem more and more limited.Therefore for the mud of municipal wastewater treatment plant is sought to solve outlet, be vital.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind for the treatment of process of sludge drying, the high-temperature gas that it utilizes cement kiln to produce is as the thermal source of wet sludge anhydration, wet mud is transferred heat to again by the thermal oil of moisture eliminator, make wet sludge anhydration, the mud after mummification burn in kiln tail decomposing furnace release heat can Substitute For Partial coal-fired.
The object of the invention is to be realized by following technical scheme, it comprises the following steps:
(1) from each sewage work wet mud after metering, first enter mud and receive storehouse, then send into wet sludge storage bin with the mud drag conveyer received bottom storehouse and store;
(2) mud in wet sludge storage bin is admitted to moisture eliminator and carries out continuous mummification, the drying medium of described moisture eliminator is thermal oil, dry heat is all from cement kiln, by extracting 850 ~ 900 degree of high-temperature gases at cement kiln decomposing furnace, the heat of high-temperature gas passes to thermal oil through heat exchanger heat, thermal oil is recycled and is heated to 280 ~ 300 degree, finally transfer heat to wet mud, make drying sludge (mud is by heat drying in moisture eliminator), moisture is reduced to 25% ~ 35% from 80%; Sludge volume after mummification is only original 1/3 ~ 1/2.
(3) dried particle and gas enter cyclonic separator, in cyclonic separator solid substance and gas separated because of density difference, mud granule be collected in bottom, discharged by rotary valve;
(4) cooled mud granule is sent in cement kiln decomposing furnace through handling equipment and is burned; Described dried sludge calorific value is about 2600 kilocalories, and burning in decomposing furnace can Substitute For Partial fuel.
(5) gas containing water vapour and a small amount of ultrafine particle is sent to bag filter, filtering gas and steam in bag filter, separated by the superfine product of small particle size, the fine particle product separated sinks in bottom, is sent to handling equipment; Send in cement kiln decomposing furnace together with the mud granule in step (4) and burn;
(6) extract after circulation through the isolated vapor portion of bag filter through whizzer, a part is heated the top returned to moisture eliminator again through well heater, and all the other steam enter condensing tower cooling;
(7) cooled water of condensation (i.e. waste water) is collected in bottom condensing tower and flows out, and then delivers to sewage treatment unit; The waste gas of discharging from condensing tower top, is extracted by centrifugal blower and is sent to cement kiln burning.Water after sewage treatment unit process can come back in technique and utilize, and accomplishes the zero release of sewage.
Described mud receives storehouse and is divided into 2, can hold 80 tons of wet mud altogether.
Described wet sludge storage bin divides a storehouse and b storehouse, can hold 300 tons of wet mud altogether.
Described moisture eliminator adopts turbine thin layer drying machine.
In described step (2), being admitted to the maximum that moisture eliminator carries out the wet mud of continuous mummification is 4 tons/hour.
The heat of described well heater carrys out automatic heat-exchanger.
Described handling equipment can be machine for zipper.
Described rotary valve is directly installed in the lower nozzle of cyclonic separator.
Described cyclonic separator and bag filter all have the heating and thermal insulation of hot-water return, to avoid vapor condensation.
For ensureing that dry loop is carried out under normal pressure and tiny structure, from drying sludge process loop, extract a small amount of steam enter condensing tower, water vapour is by the water condensation of reverse circulation.Condensation process adopts closed cycle to save the consumption of water.
In described step (7), lead at condensing tower in the pipeline of cement kiln and be provided with mist eliminator, for filtering the droplet saturated gas (namely from the waste gas that condensing tower top is discharged), and droplet is isolated and is back in condensing tower.
The principle of work of turbine thin layer drying machine:
The cardinal principle of turbine-dry technology produces raw material thin layer.Raw material is attached to inboard wall of cylinder block at inner continuous moving under powerful eddy effect.By the thin layer of this material, heat exchange can be carried out under very high heat exchange coefficient and thermo-efficiency.
Need dried product be admitted in the cylindrical container of horizontal, turbine agitator wherein by raw material centrifugation on inwall.
Thermal conduction is mainly by the indirect conduction of the deep fat in cylinder body container concentric liner, and part is obtained by preheated air convection current.This drying process only need use a small amount of air, heat without the need to direct flame.Therefore, the raw material reutilization system not changing product property is specially adapted to.
Dried mud enters turbine thin layer drying machine by loader, and the lining internal recycle of drying machine has the thermal oil of temperatures as high 280 ~ 300 degree, makes the inwall of reactor obtain evenly effectively heating.On charging ground simultaneously, the process air of 220 ~ 260 degree enters drying machine from homonymy.The rotor coaxial from cylindrical reactor is equipped with the blade of different curve on different positions, water-containing sludge is formed one deck material thin layer by the eddy current that high speed rotating blade is formed under the process air of following current drives on reactor wall, this thin layer moves to opposite side spiral from reactor feed side with certain speed, completes the operations such as dry.
Continous way turbine thin layer drying machine is furnished with hot oiling lining.Mud is by the thermal conduction with hot wall and heat and drying mud with the thermal convection two kinds of indirect heat exchange of the cycling hot air-flow flowed in the same way.Turbodrier produces eddy current, and product travels forward along the inwall of turbodrier heat under the action of the centrifugal.
Turbine is by a three-phase machine and belt drives.There is preheated air inlet mouth in ingress, and need the entrance of dried mud.Rotatable parts are coated with high-abrasive material.Hot oiling lining is manufactured by carbon steel, and wrap up heat insulation (100mm is thick) by rock wool non-conductive fibre, and outside is protected by stainless steel casing (0.5mm is thick).
Advantage of the present invention is:
1, heat-obtaining derives from cement kiln decomposing furnace, need not build boiler separately.
2, heat drying automation degree of equipment is high, safety performance good, thermal transition efficiency is higher.
3, after drying, mud is directly delivered to the interior burning of decomposing furnace, avoids the danger of existence in dewatered sludge storage, and the heat that dewatered sludge burning simultaneously can be utilized to discharge substitutes decomposing furnace partial fuel coal, realizes the energy recovery of dewatered sludge.
4, mud burns under the high temperature of decomposing furnace 850 DEG C, the residence time long burning thoroughly, solve the problem that conventional incineration exists the generation of dioxin, the flying dust that after burning, mud produces is fired into cement as cement raw material under cement kiln 1450 DEG C of high temperature, there is not the problem of the flying ash that conventional incineration exists.
5, the waste gas produced in sludge drying is burned to cement kiln by Cemented filling, burns thoroughly, have advantage compared with traditional deodorizing.
6, mud lime-ash is in the process being fired into cement, and the heavy metal in lime-ash is cured in the lattice of cement clinker, solves heavy metal pollution problem thoroughly.Cement kiln mummification disposing sludge is that one processes disposal options the most thoroughly compared with traditional mummification.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Accompanying drawing is the process flow sheet of the treatment process of sludge drying.
Embodiment
The treatment process of a kind of sludge drying described in the present embodiment, technical process as shown in drawings:
(1) from each sewage work wet mud after metering, first enter mud and receive storehouse, then send into wet sludge storage bin with the mud drag conveyer received bottom storehouse and store;
(2) mud in wet sludge storage bin is admitted to moisture eliminator and carries out continuous mummification, the drying medium of described moisture eliminator is thermal oil, dry heat is all from cement kiln, by extracting 850 ~ 900 degree of high-temperature gases at cement kiln decomposing furnace, the heat of high-temperature flue gas passes to thermal oil through heat exchanger heat, thermal oil is recycled and is heated to 280 ~ 300 degree, finally transfer heat to wet mud, make drying sludge (mud is by heat drying in moisture eliminator), moisture is reduced to 25% ~ 35% from 80%; Sludge volume after mummification is only original 1/3 ~ 1/2.
(3) dried particle and gas enter cyclonic separator, in cyclonic separator solid substance and gas separated because of density difference, mud granule be collected in bottom, discharged by rotary valve;
(4) cooled mud granule is sent in cement kiln decomposing furnace through handling equipment and is burned; Described dried sludge calorific value is about 2600 kilocalories, and burning in decomposing furnace can Substitute For Partial fuel.
(5) gas containing water vapour and a small amount of ultrafine particle is sent to bag filter, filtering gas and steam in bag filter, separated by the superfine product of small particle size, the fine particle product separated sinks in bottom, is sent to handling equipment; Send in cement kiln decomposing furnace together with the mud granule in step (4) and burn;
(6) extract after circulation through the isolated vapor portion of bag filter through whizzer, a part is heated the top returned to moisture eliminator again through well heater, and all the other steam enter condensing tower cooling;
(7) cooled water of condensation (i.e. waste water) is collected in bottom condensing tower and flows out, and then delivers to sewage treatment unit; The waste gas of discharging from condensing tower top, is extracted by centrifugal blower and is sent to cement kiln burning.Water after sewage treatment unit process can come back in technique and utilize, and accomplishes the zero release of sewage.
Described mud receives storehouse and is divided into 2, can hold 80 tons of wet mud altogether.
Described wet sludge storage bin divides a storehouse and b storehouse, can hold 300 tons of wet mud altogether.
Described moisture eliminator adopts turbine thin layer drying machine.In the present embodiment, described moisture eliminator adopts VOMM turbine thin layer drying machine.
In described step (2), being admitted to the maximum that moisture eliminator carries out the wet mud of continuous mummification is 4 tons/hour.
The heat of described well heater carrys out automatic heat-exchanger.
In the present embodiment, described handling equipment is machine for zipper.
Described rotary valve is directly installed in the lower nozzle of cyclonic separator.
Described cyclonic separator and bag filter all have the heating and thermal insulation of hot-water return, to avoid vapor condensation.
In described step (7), lead at condensing tower in the pipeline of cement kiln and be provided with mist eliminator, for filtering the droplet saturated gas (namely from the waste gas that condensing tower top is discharged), and droplet is isolated and is back in condensing tower.
In the present embodiment, the sludge water content after mummification is reduced to 25% from 80%, and volume is only original 1/3.
Per-cent all in the present invention is all weight percentage.
Claims (9)
1. a treatment process for sludge drying, is characterized in that: it comprises the following steps:
(1) from each sewage work wet mud after metering, first enter mud and receive storehouse, then send into wet sludge storage bin with the mud drag conveyer received bottom storehouse and store;
(2) mud in wet sludge storage bin is admitted to moisture eliminator and carries out continuous mummification, the drying medium of described moisture eliminator is thermal oil, dry heat is all from cement kiln, by extracting 850 ~ 900 degree of high-temperature gases at cement kiln decomposing furnace, the heat of high-temperature gas passes to thermal oil through heat exchanger heat, and thermal oil is recycled and is heated to 280 ~ 300 degree, finally transfers heat to wet mud, make drying sludge, moisture is reduced to 25% ~ 35% from 80%;
(3) dried particle and gas enter cyclonic separator, in cyclonic separator solid substance and gas separated because of density difference, mud granule be collected in bottom, discharged by rotary valve;
(4) cooled mud granule is sent in cement kiln decomposing furnace through handling equipment and is burned;
(5) gas containing water vapour and a small amount of ultrafine particle is sent to bag filter, filtering gas and steam in bag filter, separated by the ultrafine particle of small particle size, the ultrafine particle separated sinks in bottom, is sent to handling equipment; Send in cement kiln decomposing furnace together with the mud granule in step (4) and burn;
(6) extract after circulation through the isolated vapor portion of bag filter through whizzer, a part is heated the top returned to moisture eliminator again through well heater, and all the other steam enter condensing tower cooling;
(7) cooled water of condensation is collected in bottom condensing tower and flows out, and then delivers to sewage treatment unit; The waste gas of discharging from condensing tower top, is extracted by centrifugal blower and is sent to cement kiln burning.
2. the treatment process of sludge drying as claimed in claim 1, is characterized in that: described mud receives storehouse and is divided into 2, holds 80 tons of wet mud altogether.
3. the treatment process of sludge drying as claimed in claim 1, is characterized in that: described wet sludge storage bin divides a storehouse and b storehouse, holds 300 tons of wet mud altogether.
4. the treatment process of sludge drying as claimed in claim 1, is characterized in that: described moisture eliminator adopts turbine thin layer drying machine.
5. the treatment process of sludge drying as claimed in claim 1, is characterized in that: in described step (2), and being admitted to the maximum that moisture eliminator carries out the wet mud of continuous mummification is 4 tons/hour.
6. the treatment process of sludge drying as claimed in claim 1, is characterized in that: described handling equipment is machine for zipper.
7. the treatment process of sludge drying as claimed in claim 1, is characterized in that: described rotary valve is directly installed in the lower nozzle of cyclonic separator.
8. the treatment process of sludge drying as claimed in claim 1, is characterized in that: described cyclonic separator and bag filter all have the heating and thermal insulation of hot-water return, to avoid vapor condensation.
9. the treatment process of sludge drying as claimed in claim 1, it is characterized in that: in described step (7), lead at condensing tower in the pipeline of cement kiln and be provided with mist eliminator, for filtering the droplet in saturated gas, and droplet is isolated and is back in condensing tower.
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104341084B (en) * | 2013-08-02 | 2015-12-02 | 天华化工机械及自动化研究设计院有限公司 | For the energy-saving printing and dyeing sludge dehumidification system of cogeneration |
| CN103708701A (en) * | 2013-12-31 | 2014-04-09 | 一重集团大连设计研究院有限公司 | After-treatment system of dried fine-powder sludge and treatment method |
| CN105152503B (en) * | 2015-08-28 | 2017-04-26 | 大连爱德摩设备制造有限公司 | Efficient treatment system of oil sludge |
| CN105222533B (en) * | 2015-10-21 | 2017-09-29 | 上海市离心机械研究所有限公司 | The operating method of centrifugal drying system |
| CN107879594A (en) * | 2017-12-20 | 2018-04-06 | 贝莱特空调有限公司 | A kind of energy recovery type temperature adjusting and dehumidifying sludge drier system |
| CN109650695A (en) * | 2018-12-25 | 2019-04-19 | 广东闻扬环境科技有限公司 | Sludge drying mechanism and drying method for sludge |
| CN110586620A (en) * | 2019-09-18 | 2019-12-20 | 北京金隅琉水环保科技有限公司 | Metering and weighing device, fly ash treatment system and fly ash treatment method |
| CN110759625A (en) * | 2019-11-11 | 2020-02-07 | 烟台润达垃圾处理运营有限公司 | Sludge drying system |
| CN112443849A (en) * | 2020-11-20 | 2021-03-05 | 安徽国祯生态科技有限公司 | Biomass power plant coupling sludge drying incineration method |
| CN112919518A (en) * | 2021-02-05 | 2021-06-08 | 丁学锋 | Method for recovering granular calcium fluoride product from calcium fluoride sludge resource |
| CN115286208A (en) * | 2022-08-25 | 2022-11-04 | 华新水泥股份有限公司 | System and method for drying and co-processing sludge by using waste heat of cement kiln |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1800062A (en) * | 2005-12-14 | 2006-07-12 | 上海金州环境工程有限公司 | Sludge anhydration and burning process, and its systematic device |
| CN101643305A (en) * | 2009-08-20 | 2010-02-10 | 浙江大学 | Method for integrating sludge drying by using brickkiln fume afterheat and brick making by using sludge |
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| JP3225372B2 (en) * | 1992-07-02 | 2001-11-05 | 太平洋セメント株式会社 | Sludge dehydration drying incineration system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1800062A (en) * | 2005-12-14 | 2006-07-12 | 上海金州环境工程有限公司 | Sludge anhydration and burning process, and its systematic device |
| CN101643305A (en) * | 2009-08-20 | 2010-02-10 | 浙江大学 | Method for integrating sludge drying by using brickkiln fume afterheat and brick making by using sludge |
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| Title |
|---|
| JP特开平6-15297A 1994.01.25 * |
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Effective date of registration: 20161025 Address after: 102202 Beijing city Changping District Machi Town Beixiaoying village of Beijing cement factory Patentee after: Beijing Jinyu North Water Environmental Protection Science and technology limited company Address before: 102202 Beijing city Changping District Machi Town Beixiaoying Village East Patentee before: Beijing Cement Plant Co., Ltd. |