WO2008092373A1 - Dispositif de séchage et recyclage à vapeur secondaire multiniveau agitateur de boue de type arbre - Google Patents

Dispositif de séchage et recyclage à vapeur secondaire multiniveau agitateur de boue de type arbre Download PDF

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Publication number
WO2008092373A1
WO2008092373A1 PCT/CN2008/000160 CN2008000160W WO2008092373A1 WO 2008092373 A1 WO2008092373 A1 WO 2008092373A1 CN 2008000160 W CN2008000160 W CN 2008000160W WO 2008092373 A1 WO2008092373 A1 WO 2008092373A1
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WO
WIPO (PCT)
Prior art keywords
sludge
hollow
shaft
secondary steam
drying device
Prior art date
Application number
PCT/CN2008/000160
Other languages
English (en)
Chinese (zh)
Inventor
Zhixiao Zhang
Original Assignee
Zhixiao Zhang
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhixiao Zhang filed Critical Zhixiao Zhang
Publication of WO2008092373A1 publication Critical patent/WO2008092373A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/001—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement the material moving down superimposed floors
    • F26B17/003—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement the material moving down superimposed floors with fixed floors provided with scrapers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating

Definitions

  • the utility model relates to a sludge drying device, in particular to a multi-stage secondary steam recycling drying device for shaft type agitating sludge.
  • the sludge heat treatment has a high capacity reduction rate, and the sludge can be disposed in a large amount and quickly, and is harmless and thoroughly developed in recent years.
  • the water content is as high as about 80%, and the calorific value is very low.
  • 304 565L of heavy oil should be added per ton of dry sludge, which consumes a lot of energy.
  • the dried sludge has a higher calorific value and can approach the calorific value of the inferior coal. Therefore, heating and dehydrating the sludge after mechanical dewatering and increasing the calorific value of the sludge are the key technologies for sludge fueling.
  • the existing shaft type sludge single-stage drying device is composed of a sludge agitation conveying machine, a heating chamber and an evaporation chamber.
  • the sludge sent to the evaporation chamber is heated by the agitation conveyor to the heat exchange chamber, and the secondary steam is evaporated in the evaporation chamber to be dried.
  • the heat source of the heating chamber is provided by a heating system external to the device, and the secondary steam is provided by A separate cooling system outside the unit condenses into water and a small amount of exhaust.
  • the thermal energy of lkg water vapor can only evaporate about lkg of sludge water.
  • the secondary steam generated by sludge evaporation still has a relatively high calorific value, but it is not conducive to transportation due to its low pressure. And the presence of contaminants in which the applicability is limited, etc., is directly taken out of the drying device for condensation treatment, and its energy is not fully utilized, resulting in a large loss of heat energy in the drying system. Therefore, the development of an energy-saving sludge drying device is an important part of the sludge fueling technology, and it is critical to realize sludge recycling, reduction, and harmlessness.
  • the purpose of the utility model is to provide a novel shaft-type agitated sludge multi-stage secondary steam reuse drying device with high efficiency, low energy consumption, low investment, and convenient continuous large-scale production in view of the deficiencies of the prior art.
  • the utility model comprises a cylindrical body.
  • a feeding mechanism is arranged on the top of the body, and a hopper is arranged on the feeding mechanism.
  • the bottom of the body is shrunk into a silo, and the bottom of the silo is provided with a discharge mechanism.
  • a stirring shaft is arranged along the shaft center in the body, and the stirring shaft is coupled with the motor.
  • the multi-layer hollow tray is arranged flat in the body, and the edge of the hollow tray is matched with the inner wall and fixedly connected, and the hollow tray is empty above each layer.
  • the room is a sludge evaporation chamber.
  • the hollow tray as a sludge heating chamber includes a top heating plate and a bottom portion partition plate, and the heating plate and the partition plate are connected by a baffle plate in a vertical direction.
  • the baffle is spiral or labyrinth, and the heating plate, the partition plate and the baffle are enclosed to form a spiral or labyrinth heat source medium flow path.
  • the starting end of the heat source medium flow channel in the hollow tray of the bottom layer communicates with the heat source through the pipeline, and the sludge evaporation chamber of the top layer communicates with the outside through the pipeline.
  • the starting end of the heat source medium flow passage in the remaining hollow trays is connected to the sludge evaporation chamber below it through a pipeline.
  • the multi-layer hollow trays are arranged with a central discharge opening and a rim discharge opening, the central discharge opening is arranged at the center of the hollow tray, and the edge discharge opening is arranged at the edge of the hollow tray.
  • a stirring arm is arranged on the upper part of each hollow tube, and the stirring arm is fixedly connected with the stirring shaft.
  • the feeding mechanism is one of a screw conveyor, a scraper conveyor, a chain conveyor, a belt conveyor, and a piston push rod.
  • the discharging mechanism is one of a screw conveyor, a scraper conveyor, a chain conveyor, a belt conveyor, and a piston push rod.
  • the terminating end of the heat source medium flow passage in each of the hollow trays is provided with a drain pipe and an exhaust pipe which communicate with the outside.
  • the scraping arm is disposed in the silo, and the scraping arm is fixedly connected with the stirring shaft and corresponds to the position of the sidewall of the silo.
  • the stirring arm is a tweezers, wherein the dowel of the tweezers above the hollow tray provided with the central discharge port is inclined toward the center, and the dowel of the tweezers above the hollow tray provided with the edge discharge opening is inclined toward the edge.
  • the agitating arm is a scraper, wherein the blade of the scraper above the hollow tray provided with the central discharge port is at the inner bend, and the blade of the scraper disposed above the hollow tray provided with the edge discharge opening is at the outer bend.
  • the utility model relates to a multi-stage secondary steam recycling drying device for shaft-type agitated sludge, which realizes the directed transport of sludge by means of mechanical stirring, and can realize heat exchange between the sludge heat exchange stroke and the multi-stage secondary steam heating chamber.
  • the utility model only participates in the heat exchange of the final heating chamber with a small amount of external heating source, and indirectly heats the sludge in the final evaporation chamber to evaporate the secondary steam of the sludge, and the secondary steam is reused as the upper heating chamber.
  • the heat source participates in the heat exchange of the upper heating chamber; and so on, the secondary steam of the evaporation chamber at each level is utilized step by step until the first stage evaporation chamber.
  • the sludge is continuously evaporated in the evaporation chamber of each stage and gradually dried.
  • the secondary steam in the evaporation chamber of each level is reused to participate in the heat exchange of the upper heating chamber, and is condensed into water and a small amount of exhaust gas, and the hydrophobic and exhaust gases are discharged from the device. Secondary of the first stage evaporation chamber
  • the steam can be discharged directly, cooled by the condenser to water and a small amount of tail gas. Since the exhaust gas has a foul odor, it needs to be sent to the deodorization system for purification treatment. After the secondary steam is concentrated, it is disposed of separately.
  • the secondary steam of the sludge in the multi-stage evaporation chamber is fully reused, and the energy of the external heating source equivalent to 1 kg of water vapor can be evaporated, and the sludge moisture of about 2 to 5 kg can be evaporated, and the energy saving effect is very remarkable.
  • FIG. 1 is a schematic structural view of an embodiment of the present invention
  • Figure 2 is a schematic cross-sectional view taken along line A-A of Figure 1;
  • Figure 3 is a schematic cross-sectional view of the B B of Figure 1.
  • the shaft type agitated sludge multi-stage secondary steam reuse drying device of the present invention comprises a sealed body 11 which is externally insulated.
  • a stirring shaft 15 driven by a motor 16 is provided in the body 11.
  • a screw conveyor 2 and a hopper 1 At the upper end of the body 11, a screw conveyor 2 and a hopper 1, a lower end of the body 11 is contracted to form a silo 8, and a screw conveyor 10 is disposed at the bottom of the silo 8.
  • a scraper arm 9 for anti-blocking is disposed in the silo 8, and the scraper arm 9 is fixedly coupled to the agitating shaft 15 and corresponds to the position of the side wall of the silo 8.
  • the hollow tray as a sludge heating chamber includes a top heating plate 4 and a bottom portion partition plate 7, and the heating plate 4 and the partition plate 7 are connected by a spiral baffle 5 in the vertical direction.
  • the heating plate 4, the partition plate ⁇ and the baffle plate 5 are enclosed to form a spiral heat source medium flow path 13.
  • the center of the top and bottom hollow trays is provided with a central discharge opening 14, and the edge of the hollow tray of the intermediate layer is provided with an edge discharge port 6.
  • each hollow tube is provided with a stirring crucible 3, and the stirring crucible 3 is fixedly coupled with the stirring shaft 15, and the top and bottom stirring crucibles 3 are inclined toward the center, and the crucible of the stirring crucible 3 of the intermediate layer is inclined toward the edge.
  • the starting end of the heat source medium flow path 13 in the hollow tray of the bottom layer communicates with the heat source through the pipeline, and the sludge evaporation chamber 12 of the top layer communicates with the outside through the pipeline.
  • the starting end of the heat source medium flow passage 13 in the hollow tray of the top layer and the intermediate layer is connected to the sludge evaporation chamber 12 below it through a pipeline, and the end of the heat source medium flow passage 13 is provided with a discharge pipe and an exhaust pipe which communicate with the outside. tube.
  • Step 1 The sludge is sent to the sludge secondary steam to be reused in the drying device hopper.
  • Step 2 The sludge is continuously fed into the primary sludge evaporation chamber by means of a screw conveyor under the hopper.
  • Step 3 The sludge in the primary sludge evaporation chamber is transported by means of agitating arms, and the sludge is flattened. Spread on the heating plate and continuously flip, the sludge absorbs the heat energy of the first heating chamber while moving along the heating plate, evaporates the secondary steam, and flips the sludge to the center discharge port, and drops to the secondary evaporation chamber by gravity. .
  • the secondary vapor of the primary evaporation chamber can be directly exported from the pipeline. The sludge was first dried.
  • Step 4 The sludge in the secondary evaporation chamber is conveyed by the stirring of the stirring arm, the sludge is laid on the heating plate and continuously turned, and the sludge absorbs the heat energy of the secondary heating chamber while moving along the heating plate, and evaporates twice.
  • the steam is turned and the sludge is turned to the edge discharge port and dropped by gravity into the tertiary evaporation chamber.
  • the secondary vapor of the stage evaporation chamber is connected to the beginning end of the heat source medium flow path of the primary heating chamber through a pipeline.
  • the secondary steam of this stage is introduced into the primary heating chamber for reuse as a heat source to participate in the heat exchange of the heating plate, and the exhaust gas after the heat exchange is led out by the exhaust pipe, and the hydrophobicity is led out by the discharge pipe.
  • the sludge was dried in two stages.
  • Step 5 The sludge in the third-stage evaporation chamber is conveyed by the stirring of the stirring arm, and the sludge is laid on the heating plate and continuously turned.
  • the sludge absorbs the heat energy of the third-stage heating chamber while moving along the heating plate, and evaporates twice.
  • the steam is turned to the center discharge port, and the gravity is dropped to the silo, and the dried product is sent out by the screw conveyor to complete the entire sludge drying process.
  • the secondary vapor of the stage evaporation chamber is connected to the beginning of the heat source medium flow path of the secondary heating chamber through a pipeline.
  • the secondary steam of the stage is introduced into the secondary heating chamber for reuse as a heat source to participate in the heat exchange of the heating plate, and the exhaust gas after the heat exchange is led out by the exhaust pipe, and the hydrophobicity is led out by the discharge pipe.
  • the sludge was dried in three stages. Since the heating chamber of this stage is the final stage, it is necessary to connect external external heating sources such as steam, heat transfer oil, flue gas and hot air through pipes.
  • the drying device of the utility model realizes the agitation conveying mechanism of the directional heat exchange stroke of the sludge.
  • the multi-axis combined rotation of the motor can be realized to realize the directional heat exchange stroke of the sludge, and the combined arrangement of the agitation conveying mechanism It is like pulling the meshing gear sets apart by an appropriate distance so that the mechanisms do not touch each other and the agitating surfaces have a certain superposition.
  • the drying apparatus of the present invention can be set to a horizontal or different number of stages depending on the nature of the sludge, the moisture content of the dried product, the form of the dried product, the supply conditions of the external heating source, and the arrangement of the field.
  • the shaft type agitated sludge multi-stage secondary steam reuse drying device of the utility model has the advantages of:
  • the shaft type agitation conveying structure is adopted, and the secondary steam of the sludge can be reused for multi-stage drying, the system is simple and reliable, the installation power of the device is low, and the power consumption of the plant is saved.
  • the oxygen content of the device is very low, which reduces the risk of spontaneous combustion and explosion of dust. 08000160 After heating, the amount of exhaust gas treatment is small.
  • the drying device is in a negative pressure operation state, and no odor is leaked.
  • the material has wide adaptability and is suitable for drying (including granulation) of various chemical products and mineral products, especially suitable for slurry materials.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Sludge (AREA)

Abstract

L'invention concerne un dispositif de séchage de boue équipé d'un mécanisme d'alimentation placé au-dessus du corps (11) et d'un caisson formé au fond du corps. Un mécanisme d'évacuation est placé au fond du caisson. Un arbre d'agitateur (15) et des plaques de colonnes creuses multiniveau sont disposés à l'intérieur du corps. Des bras d'agitateur (3) se trouvent au-dessus des plaques de colonnes creuses. Les espaces au-dessus des plaques de colonnes creuses séparent les chambres de vaporisation de boue (12). Des passages d'écoulement de milieu de source de chaleur sont constitués de plaques de chaleur (4), de plaques de séparation (7) et de plaques de chicane (5) dans les plaques de colonnes creuses. L'extrémité étoilée de chaque passage d'écoulement du milieu de source de chaleur est reliée à la chambre inférieure de vaporisation de boue par pipeline. Les plaques de colonnes creuses multicouche sont pourvues de ports d'évacuation centraux (14) et de ports d'évacuation de bord à intervalle. Le parcours d'échange de chaleur de boue échange effectivement la chaleur avec la chambre de chauffage de vapeur secondaire multiniveau, ce qui permet d'économiser de l'énergie.
PCT/CN2008/000160 2007-01-26 2008-01-23 Dispositif de séchage et recyclage à vapeur secondaire multiniveau agitateur de boue de type arbre WO2008092373A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200720105964.8 2007-01-26
CNU2007201059648U CN201000259Y (zh) 2007-01-26 2007-01-26 轴型搅拌污泥多级二次蒸汽回用干燥装置

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Publication Number Publication Date
WO2008092373A1 true WO2008092373A1 (fr) 2008-08-07

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Cited By (1)

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CN108247882A (zh) * 2018-02-01 2018-07-06 辽宁华远石化科技有限公司 本体法氯乙烯用搅拌装置

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CN201000259Y (zh) * 2007-01-26 2008-01-02 张志霄 轴型搅拌污泥多级二次蒸汽回用干燥装置
CN102815852A (zh) * 2012-08-16 2012-12-12 昆明理工大学 一种污泥干化成套处理装置
CN102914134A (zh) * 2012-10-15 2013-02-06 曾应祥 一种过热蒸汽干燥装置
CN103964671B (zh) * 2013-01-25 2015-12-09 宝山钢铁股份有限公司 一种污泥干化装置及利用该装置干化污泥的方法
CN103588379A (zh) * 2013-11-25 2014-02-19 成都绿源新创环保科技有限公司 一种立式污泥干燥器
CN106574819B (zh) * 2014-06-12 2020-05-05 赫德因有限责任公司 用于烹饪和干燥有机材料的装置
CN104819474B (zh) * 2015-05-12 2017-01-25 江苏中世环境科技股份有限公司 高效无烟气碳化装置
CN106382801A (zh) * 2016-10-17 2017-02-08 无锡市日升化工有限公司 一种可搅拌烘干的pvc加工助剂干燥箱
CN106422835A (zh) * 2016-11-11 2017-02-22 扬州宏远新材料股份有限公司 一种搅拌装置
CN108627027A (zh) * 2017-03-20 2018-10-09 熙凯法人株式会社 咖啡原豆冷却装置
CN107339875B (zh) * 2017-08-02 2023-09-19 宜诺(天津)制药设备有限公司 一种布料器可旋转的直接传导快速连续加热干燥罐
CN107445446B (zh) * 2017-09-22 2019-03-26 西安吉利电子化工有限公司 一种塔板式干燥发酵装置
CN108675606A (zh) * 2018-06-22 2018-10-19 无锡南理工科技发展有限公司 一种污水处理用的污泥干化设备
CN110584167B (zh) * 2019-08-08 2022-07-08 邯郸学院 一种大蒜连续烘干塔
CN113877477B (zh) * 2021-10-26 2023-11-10 中国矿业大学 一种煤泥造粒干燥装备及工作方法
CN114917687B (zh) * 2022-06-14 2023-05-05 山东明化新材料有限公司 一种聚苯硫醚浆料洗涤塔

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CN108247882A (zh) * 2018-02-01 2018-07-06 辽宁华远石化科技有限公司 本体法氯乙烯用搅拌装置
CN108247882B (zh) * 2018-02-01 2024-03-19 辽宁华远石化科技有限公司 本体法氯乙烯用搅拌装置

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