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CN101913750A - A sludge granulation drying device and method - Google Patents

A sludge granulation drying device and method Download PDF

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Publication number
CN101913750A
CN101913750A CN 201010252412 CN201010252412A CN101913750A CN 101913750 A CN101913750 A CN 101913750A CN 201010252412 CN201010252412 CN 201010252412 CN 201010252412 A CN201010252412 A CN 201010252412A CN 101913750 A CN101913750 A CN 101913750A
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sludge
spouted
bed
fluidized bed
fluidized
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CN101913750B (en
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沈来宏
张海峰
肖军
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Southeast University
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Southeast University
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Abstract

一种污泥造粒干燥装置及方法是一种能够安全有效地对污水厂的湿污泥进行处理,便于污泥后续资源化开发利用的装置及方法,该装置包括螺旋挤压颗粒成型机、喷动流化床和干化污泥颗粒料仓组成,螺旋挤压颗粒成型机由传动轴、螺旋给料器、污泥挤压成型孔板和旋转刀片,其方法在于用中间隔板将喷动流化床划隔成上下保持连通的喷动床和流化床两个区域,将从螺旋挤压颗粒成型机出来的湿污泥颗粒从喷动床床层表面向下进入喷动床,初步干燥后的污泥成型颗粒从喷动床下部开口处流入流化床底部,另一部分热气体介质从流化风进气口进入流化床对污泥颗粒进行深度干燥,干燥后的污泥颗粒从流化床底部向上运动到流化床床层表面,最后溢流出流化床,进入干化污泥颗粒仓。

Figure 201010252412

A sludge granulation drying device and method is a device and method that can safely and effectively treat wet sludge in a sewage plant, and facilitate the subsequent development and utilization of sludge resources. The device includes a screw extrusion granule forming machine, It consists of a spouted fluidized bed and a dry sludge granule silo. The screw extrusion granule forming machine consists of a transmission shaft, a screw feeder, a sludge extrusion forming orifice and a rotating blade. The method is to use the middle partition to separate the spray The dynamic fluidized bed is divided into two areas, the spouted bed and the fluidized bed, which are connected up and down. The wet sludge particles from the screw extrusion granule molding machine enter the spouted bed from the surface of the spouted bed down. The preliminarily dried sludge particles flow into the bottom of the fluidized bed from the lower opening of the spouted bed, and another part of the hot gas medium enters the fluidized bed from the fluidized air inlet to deeply dry the sludge particles, and the dried sludge The particles move upward from the bottom of the fluidized bed to the surface of the fluidized bed layer, and finally overflow out of the fluidized bed and enter the dry sludge particle bin.

Figure 201010252412

Description

A kind of mud granulizing drying installation and method
Technical field
A kind of device and method of the present invention for wet mud is handled, especially a kind of mud granulizing drying installation and method.
Background technology
Along with the raising of urbanization process quickening and living standards of the people, the city domestic sewage amount sharply increases.The auxiliary product of mud after as sewage work's sewage disposal is because of being rich in objectionable impuritiess such as organic detritus, bacterium thalline and heavy metal, very big to environmental influence.Sludge treatment has become the significant problem of the puzzlement sewage work and the whole society, how to handle municipal sludge safely and effectively, has become the focus of current research.
The primary sludge water ratio of sewage work is up to 95%, the mechanical dehydration method can only reduce to 80% with its water ratio at present, subsequent disposal is disposed very difficult, and in methods of disposal such as sludge incineration, compost, landfill, all requires the water ratio of mud is reduced to below 65%; On the other hand, the solid composition is to exist in the wet mud with molecule in the mud, and that the mud after the mummification presents is Powdered, waves in atmosphere contaminate environment easily.Therefore, the mud granulizing drying becomes economy, efficiently handles the gordian technique of mud.
In the fluidized bed dryer of routine, easily bonding is agglomerating in fluidized-bed for the wet mud behind the mechanical dehydration, causes the fluidized bed dryer can't works better, and along with the rising of mud temperature, wet mud bonding agglomeration is even more serious; On the other hand, conventional fluidized bed dryer is unfavorable for the mud granulizing drying because particle layers structure coalescence inhomogeneous, bubble causes an interior channel, undesired fluidisation phenomenon such as turbulent.
Summary of the invention
Technical problem: the purpose of this invention is to provide a kind of mud granulizing exsiccant device and method, adopt this method to handle the wet mud of Sewage Plant safely and effectively, be convenient to the follow-up resource utilization development and use of mud.
Technical scheme: mud granulizing drying installation of the present invention comprises screw extrusion granule-forming machine, spouted fluidized bed and dewatered sludge particle feed bin; Wherein, the screw extrusion granule-forming machine comprises transmission shaft, screw feeder, mud extrusion molding orifice plate and rotating blade, mud extrusion molding orifice plate is fixed in the housing of screw feeder downstream, and transmission shaft passes mud extrusion molding orifice plate and rotating blade links; The outlet of screw extrusion granule-forming machine connects spouted fluidized bed, spouted fluidized bed is drawn spouted bed and two zones of fluidized-bed that are divided into maintenance connection up and down with central dividing plate, the bottom of spouted bed is spouted wind inlet mouth, the bottom of fluidized-bed is the fluidized wind inlet mouth, the middle part of fluidized-bed is an overflow port, and overflow port and dewatered sludge particle feed bin link; The top of this spouted fluidized bed is for containing the humid gas venting port.The perforate of described mud extrusion molding orifice plate is circular, oval, square or Polygons, or difform combination.
The granulating and drying method of mud granulizing drying installation of the present invention is: the mud that will wet is delivered to mud extrusion molding orifice plate by screw feeder, be squeezed into strip through mud extrusion molding orifice plate, cut into particulate state through rotating blade then, enter spouted bed, the hot gas medium enters spouted bed from spouted wind inlet mouth, form a stable jeting area in spouted bed bottom, the hot gas medium is upward through spouted zone and forms counter current contact with the mud granule that moves downward, mud granule forms cyclic motion clocklike in spouted bed, wet mud granule is strengthened moulding and preliminarily dried, mud shaped granule behind the preliminarily dried flows into the fluidized-bed bottom from spouted bed lower openings, another part hot gas medium enters fluidized-bed from the fluidized wind inlet mouth, mud granule is under the effect of hot gas medium, present fluidized state, mud granule is carried out the deep dehydration drying, finishing the moisture that the hot gas medium after the heat exchange carries in the mud discharges from the humid gas venting port that contains at spouted fluidized bed top, the dewatered sludge particle that evaporates behind the moisture is discharged fluidized-bed through the overflow port of spouted fluidized bed, enter dewatered sludge particle feed bin, in whole mud granulizing drying process, the temperature of spouted bed and fluidized-bed is in 105 ℃~350 ℃.Described hot gas medium is air, flue gas, water vapour or other gas.
In the described mud granulizing drying means, in spouted fluidized bed, adopt central dividing plate, spouted fluidized bed is drawn spouted bed and two zones of fluidized-bed that are divided into maintenance connection up and down, prevention directly flows into dewatered sludge particle feed bin from the spouted fluidized bed bed face from the wet mud granule that the screw extrusion granule-forming machine comes out, promptly utilize central dividing plate, to enter spouted bed downwards from spouted bed bed face from the wet mud granule that the screw extrusion granule-forming machine comes out, mud granule behind the preliminarily dried flows into the fluidized-bed bottom from spouted bed lower openings, move upward to the fluidized bed laminar surface then, overflow fluidized-bed at last, enter dewatered sludge particle storehouse, this method significant prolongation the residence time of mud granule in spouted bed and fluidized-bed, especially mud granule contacts with the hot gas medium counter flow in spouted bed, impels the abundant granulating and drying of mud.
Beneficial effect: in the fluidized bed dryer of routine, the wet mud behind the mechanical dehydration easily bonding is agglomerating, causes the fluidized bed dryer can't works better, and along with the rising of mud temperature, wet mud bonding agglomeration is even more serious; On the other hand, conventional fluidized bed dryer is unfavorable for the mud granulizing drying because particle layers structure coalescence inhomogeneous, bubble causes an interior channel, undesired fluidisation phenomenon such as turbulent.
The present invention is a kind of method of mud granulizing exsiccant, be specially the mud that to wet and be delivered to mud extrusion molding orifice plate by screw feeder, be squeezed into strip through mud extrusion molding orifice plate, cut into particulate state through rotating blade then, enter spouted bed downwards from spouted bed bed face, the hot gas medium enters spouted bed from spouted wind inlet mouth, form a stable jeting area in spouted bed bottom, jet flow stream is upward through spouted zone and forms counter current contact with the mud granule that moves downward, mud granule forms cyclic motion clocklike in spouted bed, help handling the strong mud material of stickiness, be convenient to mud granule and further strengthen moulding, simultaneously, enter wet mud granule and hot gas medium in the spouted bed, the bed material is violent to be mixed, intensive heat and mass exchange take place, make the wet mud granule instantaneously heating that has just entered bed to the interior temperature of bed, the moisture evaporation that will wet in the mud granule is come out, mud shaped granule behind the preliminarily dried flows into the fluidized-bed bottom from spouted bed lower openings, another part hot gas medium enters fluidized-bed from the fluidized wind inlet mouth, mud granule is under the effect of hot gas medium, present fluidized state, mud granule is carried out the deep dehydration drying, dried mud granule moves upward to the fluidized bed laminar surface from the fluidized-bed bottom, discharge fluidized-bed through the overflow port of spouted fluidized bed then, enter dewatered sludge particle feed bin, finish the moisture that the hot gas medium after the heat exchange carries in the mud and discharge from the humid gas venting port that contains at spouted fluidized bed top.This technology not only makes mud obtain minimizing and handles, and is convenient to the follow-up resource utilization development and use of mud.
Description of drawings
Fig. 1 is an apparatus structure synoptic diagram of the present invention, wherein has: screw extrusion granule-forming machine 1, transmission shaft 11, screw feeder 12, mud extrusion molding orifice plate 13, rotating blade 14, spouted fluidized bed 2, the central dividing plate 21 of spouted fluidized bed, the spouted bed 22 of spouted fluidized bed, the fluidized-bed 23 of spouted fluidized bed, the overflow port 24 of spouted fluidized bed, dewatered sludge particle feed bin 3, spouted wind inlet mouth A, fluidized wind inlet mouth B contains humid gas venting port C.
Embodiment
Mud granulizing drying installation of the present invention, be by screw extrusion granule-forming machine 1, spouted fluidized bed 2 and dewatered sludge particle feed bin 3 are formed, wherein screw extrusion granule-forming machine 1 is by transmission shaft 11, screw feeder 12, mud extrusion molding orifice plate 13 and rotating blade 14 are formed, mud extrusion molding orifice plate 13 is fixed in the screw feeder 12 downstream housings, transmission shaft 11 passes through mud extrusion molding orifice plate 13 and rotating blade 14 links, with central dividing plate 21 with 2 strokes of spouted fluidized beds be divided into up and down keep being communicated with about two zones, correspond to spouted bed 22 and fluidized-bed 23 respectively, the bottom of spouted bed is spouted wind inlet mouth A, the bottom of fluidized-bed is fluidized wind inlet mouth B, the middle part of spouted fluidized bed 2 is an overflow port 24, and the top of spouted fluidized bed 2 is for containing humid gas venting port C.
The mud that will wet is delivered to mud extrusion molding orifice plate 13 by screw feeder 12, be squeezed into strip through mud extrusion molding orifice plate 13, cut into particulate state through rotating blade 14 then, enter spouted bed 22 downwards from spouted bed 22 bed faces, the hot gas medium enters spouted bed 22 from spouted wind inlet mouth A, form a stable jeting area in spouted bed 22 bottoms, jet flow stream is upward through spouted zone and forms counter current contact with the mud granule that moves downward, mud granule forms cyclic motion clocklike in spouted bed 22, the Rapid Cycle stirring of particle helps the mud material and further strengthens moulding, simultaneously, enter wet mud granule and hot gas medium in the spouted bed 22, bed material particle acutely mixes, intensive heat and mass exchange take place, make that just having entered the mud granule instantaneously heating of wetting in the spouted bed 22 arrives temperature in the bed, the moisture evaporation that will wet in the mud granule is come out, mud shaped granule behind the preliminarily dried flows into fluidized-bed 23 bottoms from spouted bed 22 lower openings, another part hot gas medium enters fluidized-bed 23 from fluidized wind inlet mouth B, mud granule is under the effect of hot gas medium, present fluidized state, mud granule is carried out the deep dehydration drying, dried mud granule moves upward to fluidized-bed 23 bed faces from fluidized-bed 23 bottoms, discharge fluidized-bed 23 through the overflow port 24 of spouted fluidized bed 2 then, enter dewatered sludge particle feed bin 3, finish the moisture that hot gas medium after the heat exchange carries in the mud and discharge from the humid gas venting port C that contains at spouted fluidized bed 2 tops.
The central dividing plate 21 of spouted fluidized bed is divided into 2 strokes of spouted fluidized beds in spouted bed 22 and 23 two zones of fluidized-bed that keep connection up and down, prevention directly flows into dewatered sludge particle feed bin 3 from spouted fluidized bed 2 bed faces from the wet mud granule that screw extrusion granule-forming machine 1 comes out, promptly utilize central dividing plate 21, to enter spouted bed 22 downwards from spouted bed 22 bed faces from the wet mud granule that screw extrusion granule-forming machine 1 comes out, the hot gas medium enters spouted bed 22 from spouted wind inlet mouth A, form counter current contact with the mud granule that moves downward, mud granule forms cyclic motion clocklike in spouted bed 22, mud shaped granule behind the preliminarily dried flows into fluidized-bed 23 bottoms from spouted bed 22 lower openings, move upward to fluidized-bed 23 bed faces from fluidized-bed 23 bottoms then, overflow port 24 through spouted fluidized bed overflows fluidized-bed 23.This method significant prolongation the residence time of mud in spouted bed 22 and fluidized-bed 23, especially mud granule contacts with the hot gas medium counter flow in spouted 22, impels the abundant granulating and drying of mud.
In whole mud granulizing drying process, the temperature of spouted bed 22 and fluidized-bed 23 is in 105 ℃~350 ℃ temperature.

Claims (4)

1.一种污泥造粒干燥装置,其特征在于该装置包括螺旋挤压颗粒成型机(1)、喷动流化床(2)和干化污泥颗粒料仓(3);其中,螺旋挤压颗粒成型机(1)包括传动轴(11)、螺旋给料器(12)、污泥挤压成型孔板(13)以及旋转刀片(14),污泥挤压成型孔板(13)固定在螺旋给料器(12)下游壳体内,传动轴(11)穿过污泥挤压成型孔板(13)与旋转刀片(14)相联接;螺旋挤压颗粒成型机(1)的出口接喷动流化床(2),用中间隔板(21)将喷动流化床(2)划隔成上下保持连通的喷动床(22)和流化床(23)两个区域,喷动床(22)的底部是喷动风进气口(A),流化床(23)的底部是流化风进气口(B),流化床(23)的中部为溢流口(24),溢流口(24)与干化污泥颗粒料仓(3)相联接;该喷动流化床(2)的顶部为含湿气体排气口(C)。1. A sludge granulation drying device is characterized in that the device comprises a screw extruding granule forming machine (1), a spouted fluidized bed (2) and a dried sludge granule silo (3); wherein, the screw Extrusion pellet forming machine (1) includes drive shaft (11), screw feeder (12), sludge extrusion forming orifice (13) and rotary blade (14), sludge extrusion forming orifice (13) Fixed in the downstream housing of the screw feeder (12), the transmission shaft (11) passes through the sludge extrusion molding orifice (13) and connects with the rotary blade (14); the outlet of the screw extrusion pellet molding machine (1) Connect the spouted fluidized bed (2), divide the spouted fluidized bed (2) into two areas of the spouted bed (22) and the fluidized bed (23) that are kept connected up and down with the intermediate partition plate (21), The bottom of the spouted bed (22) is a spouted air inlet (A), the bottom of the fluidized bed (23) is a fluidized air inlet (B), and the middle part of the fluidized bed (23) is an overflow port (24), the overflow port (24) is connected with the dried sludge particle silo (3); the top of the spouted fluidized bed (2) is a wet gas exhaust port (C). 2.根据权利要求1所述的污泥造粒干燥装置,其特征在于所述的污泥挤压成型孔板(13)的开孔是圆形、椭圆形、方形或多边形,或不同形状的组合。2. The sludge granulation and drying device according to claim 1, characterized in that the openings of the sludge extrusion molding orifice (13) are circular, oval, square or polygonal, or different shapes combination. 3.一种如权利要求1所述的污泥造粒干燥装置的造粒干燥方法,其特征在于:将湿污泥通过螺旋给料器(12)输送至污泥挤压成型孔板(13),经过污泥挤压成型孔板(13)挤压成条状,然后经过旋转刀片(14)切削成颗粒状,进入喷动床(22),热气体介质从喷动风进气口(A)进入喷动床(22),在喷动床(22)底部形成一个稳定的喷射区域,热气体介质向上穿过喷动区域与向下运动的污泥颗粒形成逆流接触,污泥颗粒在喷动床(22)内形成有规律的循环运动,对湿污泥颗粒进行强化成型和初步干燥,初步干燥后的污泥成型颗粒从喷动床(22)下部开口处流入流化床(23)底部,另一部分热气体介质从流化风进气口(B)进入流化床(23),污泥颗粒在热气体介质的作用下,呈现流化状态,对污泥颗粒进行深度脱水干燥,完成热交换后的热气体介质携带污泥中的水分从喷动流化床(2)顶部的含湿气体排气口(C)排出,蒸发掉水分后的干污泥颗粒经过喷动流化床的溢流口(24)排出流化床(23),进入干化污泥颗粒料仓(3),在整个污泥造粒干燥过程中,喷动床(22)和流化床(23)的温度处于105℃~350℃。3. A granulation drying method of the sludge granulation drying device as claimed in claim 1, characterized in that: the wet sludge is transported to the sludge extrusion molding orifice (13) by a screw feeder (12) ), extruded into strips through the sludge extrusion molding orifice (13), then cut into granules through the rotating blade (14), and enter the spouted bed (22), and the hot gas medium flows from the spouted air inlet ( A) Enter the spouted bed (22), form a stable spray area at the bottom of the spouted bed (22), the hot gas medium passes through the spray area to form countercurrent contact with the sludge particles moving downward, and the sludge particles are in Regular circulation is formed in the spouted bed (22), and the wet sludge particles are strengthened and preliminarily dried, and the preliminarily dried sludge formed particles flow into the fluidized bed (23) from the lower opening of the spouted bed (22). ) bottom, another part of the hot gas medium enters the fluidized bed (23) from the fluidized air inlet (B), and the sludge particles are in a fluidized state under the action of the hot gas medium, and the sludge particles are deeply dehydrated and dried , the hot gas medium after the heat exchange carries the moisture in the sludge and is discharged from the wet gas exhaust port (C) on the top of the spouted fluidized bed (2), and the dry sludge particles after the water has been evaporated pass through the spouted fluidized bed. The overflow port (24) of the fluidized bed discharges the fluidized bed (23) and enters the dried sludge granule silo (3). During the whole sludge granulation and drying process, the spouted bed (22) and the fluidized bed ( 23) The temperature is between 105°C and 350°C. 4.根据权利要求3所述的污泥造粒干燥装置,其特征在于所述的热气体介质为空气、烟气、水蒸气或其它气体。4. The sludge granulation and drying device according to claim 3, characterized in that the hot gas medium is air, flue gas, water vapor or other gases.
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Cited By (9)

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Publication number Priority date Publication date Assignee Title
CN104176902A (en) * 2014-08-31 2014-12-03 华北电力大学(保定) Fluidized bed sludge drying system
CN105152514A (en) * 2015-09-23 2015-12-16 华南理工大学 Municipal sludge three-section process drying method
CN107500504A (en) * 2017-10-20 2017-12-22 河南红东方化工股份有限公司 A kind of high-efficiency and continuous dries sludge technology
CN107954585A (en) * 2017-11-27 2018-04-24 江苏理工学院 A kind of domestic sludge assists coal desiccation molding machine
CN110395874A (en) * 2019-07-24 2019-11-01 华北水利水电大学 A multi-stage high-speed spiral extrusion drying device for urban sludge
CN110395830A (en) * 2019-07-25 2019-11-01 华北水利水电大学 High-efficiency treatment technology and treatment system for community domestic sewage
CN111365729A (en) * 2020-03-16 2020-07-03 杭州航民江东热电有限公司 Fuel conveying system with drying device
CN112358159A (en) * 2020-11-18 2021-02-12 天津五洲同创空调制冷设备有限公司 Low-temperature heat pump sludge drying machine with squeezing and water filtering functions
CN115925215A (en) * 2022-11-18 2023-04-07 盐城市泉通环保设备有限公司 Sludge treatment device and working method thereof

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CN200963582Y (en) * 2006-11-02 2007-10-24 赵增发 Granulating machine
CN101186422A (en) * 2007-12-14 2008-05-28 东南大学 Closed Multi-chamber Fluidized Bed Sludge Drying Method
CN201729747U (en) * 2010-08-11 2011-02-02 东南大学 Sludge granulation dryer

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Publication number Priority date Publication date Assignee Title
EP0857930A1 (en) * 1997-02-11 1998-08-12 Allgaier-Werke GmbH & Co. KG Apparatus and process for drying wet solid particles in fluidized beds
NL1025770C1 (en) * 2004-03-19 2005-09-20 Joannes Hupkens Processing sludge to form granular material for e.g. road construction, comprises mixing sludge with mortar in granulator
CN200963582Y (en) * 2006-11-02 2007-10-24 赵增发 Granulating machine
CN101186422A (en) * 2007-12-14 2008-05-28 东南大学 Closed Multi-chamber Fluidized Bed Sludge Drying Method
CN201729747U (en) * 2010-08-11 2011-02-02 东南大学 Sludge granulation dryer

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104176902A (en) * 2014-08-31 2014-12-03 华北电力大学(保定) Fluidized bed sludge drying system
CN105152514A (en) * 2015-09-23 2015-12-16 华南理工大学 Municipal sludge three-section process drying method
CN107500504A (en) * 2017-10-20 2017-12-22 河南红东方化工股份有限公司 A kind of high-efficiency and continuous dries sludge technology
CN107954585A (en) * 2017-11-27 2018-04-24 江苏理工学院 A kind of domestic sludge assists coal desiccation molding machine
CN110395874A (en) * 2019-07-24 2019-11-01 华北水利水电大学 A multi-stage high-speed spiral extrusion drying device for urban sludge
CN110395874B (en) * 2019-07-24 2022-01-25 华北水利水电大学 Multi-stage high-speed spiral line type extrusion drying device for urban sludge
CN110395830A (en) * 2019-07-25 2019-11-01 华北水利水电大学 High-efficiency treatment technology and treatment system for community domestic sewage
CN110395830B (en) * 2019-07-25 2022-03-01 华北水利水电大学 Community Domestic Sewage Efficient Treatment Process and Treatment System
CN111365729A (en) * 2020-03-16 2020-07-03 杭州航民江东热电有限公司 Fuel conveying system with drying device
CN112358159A (en) * 2020-11-18 2021-02-12 天津五洲同创空调制冷设备有限公司 Low-temperature heat pump sludge drying machine with squeezing and water filtering functions
CN115925215A (en) * 2022-11-18 2023-04-07 盐城市泉通环保设备有限公司 Sludge treatment device and working method thereof
CN115925215B (en) * 2022-11-18 2023-09-12 盐城市泉通环保设备有限公司 Sludge treatment device and working method thereof

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