WO2022105089A1 - 一种污泥烘干机 - Google Patents

一种污泥烘干机 Download PDF

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Publication number
WO2022105089A1
WO2022105089A1 PCT/CN2021/084816 CN2021084816W WO2022105089A1 WO 2022105089 A1 WO2022105089 A1 WO 2022105089A1 CN 2021084816 W CN2021084816 W CN 2021084816W WO 2022105089 A1 WO2022105089 A1 WO 2022105089A1
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Prior art keywords
blade
drying cylinder
sludge
main shaft
sludge dryer
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PCT/CN2021/084816
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English (en)
French (fr)
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崔厚红
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浙江鸿杰智能科技有限公司
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Publication of WO2022105089A1 publication Critical patent/WO2022105089A1/zh

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    • 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
    • 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
    • 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
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters

Definitions

  • the invention relates to the technical field of sludge treatment equipment, in particular to a sludge dryer.
  • sludge disposal methods mainly include landfill, land use and incineration.
  • Direct landfill will occupy a large amount of land, and the filtrate will pollute groundwater; land use is greatly restricted due to high sludge moisture content, large transportation volume, difficulty in dispersion, and harmful components in sludge;
  • a kind of resource utilization method uses sludge as fuel for energy supply, but this treatment method needs to reduce the moisture content of sludge to 30%-40%, otherwise sludge with high moisture content will be due to its low solid content.
  • the calorific value is low, and a large amount of auxiliary fuel needs to be consumed, and the processing cost is obviously high. Therefore, so far, drying treatment of municipal sludge and reducing water content are the main key issues in the subsequent treatment of sludge.
  • the Chinese utility model patent with publication number CN206940706U discloses a flue gas sludge dryer, including: a main transmission mechanism, a casing and a bracket for supporting the casing.
  • the upper part of one end is provided with an air inlet and a feeding port
  • the other end of the shell is provided with an air outlet
  • the bottom of the other end of the shell is provided with a discharge port.
  • the main transmission mechanism includes a main transmission shaft and a driving mechanism.
  • the shaft passes through the interior of the casing and is located at its central axis.
  • the power output end of the drive mechanism is connected to one end of the main drive shaft and is located outside the casing. In the drying process, the outside of the sludge is often dried before the inside, so the drying efficiency of this drying method is relatively low.
  • the purpose of the present invention is to provide a sludge dryer, which can effectively improve the drying efficiency of sludge.
  • a sludge dryer comprising a drying cylinder, a main shaft arranged in the drying cylinder, a conveying blade spirally wound on the main shaft along the axial direction, and a drive
  • the driving mechanism for the rotation of the main shaft, the two ends of the drying cylinder are respectively provided with a feeding port and a discharging port, the drying cylinder is arranged vertically, and the main shaft is vertically arranged in the center of the drying cylinder,
  • the conveying blade is provided with an axially penetrating extrusion hole. During the upward conveying process of the conveying blade, the wet sludge is squeezed to the bottom through the extrusion hole under the extrusion action, and the upper end of the drying cylinder is A shredding unit is provided.
  • the extrusion holes are staggered in the upper and lower circumferential directions.
  • the diameter of the extrusion hole gradually decreases from top to bottom.
  • the moisture content of the sludge is much higher than that of the sludge at the upper part of the drying cylinder, so the sludge at the bottom can basically flow to a certain extent. It is difficult for the flowing sludge to be conveyed upwardly, and it is easy to drop directly from the extrusion hole to the bottom of the drying cylinder. Therefore, a smaller hole is set to ensure that a certain amount of sludge can be conveyed upward; The rate of sludge is relatively low and it is lump or block, which is easier to be conveyed upward. During the upward conveying process, it is squeezed and squeezed from the extrusion hole to the bottom, showing the effect of stirring. During this process, the sludge is gradually removed. Dry until dry into lumps.
  • the conveying blade includes a first blade and a second blade, the first blade is arranged on the upper end of the main shaft, the second blade is arranged below the first blade, the first blade and the second blade
  • the upper and lower intervals are set to form a buffer space between them.
  • the sludge that reaches the buffer space is basically dried and becomes lumpy.
  • the sludge stays in this area for a relatively long time and can be dried more fully.
  • the sludge that first enters the buffer space is pushed up to the second blade, and the second blade is output after the crushing action of the crushing component.
  • the extrusion hole is arranged on the second blade, and the crushing component is arranged below the first blade.
  • the axial length of the first vane is smaller than the axial length of the second vane, and the extrusion hole penetrates downward from the upper end of the second vane to 1/4-1/3 of the lower end thereof.
  • the second blade at the bottom does not have extrusion holes to ensure that the sludge at the bottom can be transported upwards completely, and to ensure that the sludge has a certain extrusion force during the upward transport process, which can produce the effect of stirring.
  • the pulverizing assembly includes several cutters, and the cutters are circumferentially distributed on the main shaft.
  • one end of the cutter is fixed on the main shaft, the other end is inclined to the rear of the rotation direction, and the cutter is provided with serrations.
  • the outer side of the drying cylinder is provided with an outer cylinder, a heating zone is formed between the outer cylinder and the drying cylinder, and the upper and lower ends of the outer cylinder are respectively connected with a heat input pipe and a heat output pipe.
  • the heating zone is communicated with the drying cylinder through the discharge port, and the lower end of the outer cylinder is provided with a discharge port.
  • Beneficial effects of the present invention By setting extrusion holes on the conveying blades, the sludge with higher water content is extruded to the bottom during the screw conveying process of the sludge, so that the sludge circulates up and down in the drying cylinder. It is moved until it is dry, so as to form the effect of stirring the sludge, ensure that the sludge is fully dried, and improve the drying efficiency.
  • FIG. 1 is a schematic structural diagram of an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a conveying blade in an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a pulverizing assembly in an embodiment of the present invention.
  • a sludge dryer includes a drying cylinder 101, a main shaft 103 arranged in the drying cylinder 101, a conveying blade 104 spirally wound on the main shaft 103 in the axial direction, and a driving
  • the driving mechanism for the rotation of the main shaft 103, the drying cylinder 101 is vertically arranged, and the main shaft 103 is vertically arranged at the center of the drying cylinder 101.
  • the driving mechanism is a driving motor fixed at the bottom of the drying drum 101 .
  • the two ends of the drying cylinder 101 are respectively provided with a feeding port 107 and a discharging port 109 .
  • the outer side of the drying cylinder 101 is provided with an outer cylinder 102, a heating zone is formed between the outer cylinder 102 and the drying cylinder 101, and the upper and lower ends of the outer cylinder 102 are respectively connected with a heat input pipe 110 and a heat output pipe 111, wherein the heat input pipe 110 inputs high temperature gas for heating the drying cylinder 101, and the heat output pipe 111 is used for discharging the hot gas in the heating area, so as to realize the circulating flow of the high temperature gas up and down in the heating area.
  • the heating area is communicated with the drying cylinder 101 through a discharge port 109 , and a discharge port 108 is provided at the lower end of the outer cylinder 102 .
  • the drying cylinder 101 is made of metal with high thermal conductivity, and the outer wall of the outer cylinder 102 is wrapped with thermal insulation material.
  • the discharge port 109 is provided with a valve plate, and the valve plate is controlled by the electric push rod of the electric control to realize intermittent opening and closing, so that the high-temperature gas enters the drying cylinder 101, or the sludge after drying in the drying cylinder 101 is made. It is discharged into the heating zone and discharged through the discharge port 108 .
  • the conveying blade 104 includes a first blade 1041 and a second blade 1042.
  • the first blade 1041 is arranged at the upper end of the main shaft 103 and the second blade 1042 is arranged below the first blade 1041.
  • the axial direction of the first blade 1041 The length is less than the axial length of the second vane 1042 .
  • the first blade 1041 and the second blade 1042 are arranged at an upper and lower interval.
  • the area of the drying cylinder 101 between the first blade 1041 and the second blade 1042 is a buffer space, and the sludge will be temporarily stored here after being transported upward from the second blade 1042 to the buffer space, with the continuous input of the sludge below , until the sludge in the space is transported upward to the second blade 1042 and output by the second blade 1042 .
  • the residence time of the sludge in the drying cylinder 101 is greatly increased to ensure full drying.
  • the second blade 1042 is provided with an extrusion hole 106 , the extrusion hole 106 axially penetrates the second blade 1042 , and the extrusion hole 106 penetrates downward from the upper end of the second blade 1042 to 1/4-1/3 of the lower end of the extrusion hole 106 . place.
  • the extrusion holes 106 are distributed in a staggered manner in the upper and lower circumferential directions, that is, the extrusion holes 106 on the upper and lower adjacent blades are distributed in a circle, and are not on the same axis.
  • the diameter of the extrusion hole 106 gradually decreases from top to bottom.
  • the moisture content of the sludge is much higher than that of the sludge in the upper part of the drying cylinder, so the sludge at the bottom can basically A certain flow, if the diameter of the extrusion hole is too large, the flowable sludge is difficult to be screwed upward, and it is easy to drop directly from the extrusion hole to the bottom of the drying cylinder 101, so setting a smaller hole to ensure A certain amount of sludge can be transported upward; while the sludge above is in the form of lumps or lumps due to its relatively low water content, and is more likely to be transported upward, and is squeezed from the extrusion hole during the upward transport process. To the bottom, it shows the effect of stir-frying, and the sludge is gradually dried in the process until it dries into lumps.
  • the upper end of the drying cylinder 101 is provided with a pulverizing assembly, and the pulverizing assembly is disposed below the first blade 1041 .
  • the pulverizing assembly includes several cutters 105 , and the cutters 105 are circumferentially distributed on the main shaft 103 .
  • One end of the cutter 105 is fixed on the main shaft 103 , and the other end is inclined to the rear in the rotation direction.
  • the cutter 105 is provided with serrations 1051 . After drying, the sludge tends to form lumps. At this time, even under the action of extrusion, it cannot move down through the extrusion hole 106. Therefore, the dried sludge accumulates in the buffer space and gradually rises upward.
  • the cutter 105 chops the sludge and conveys it upward through the first blade 1041, and finally enters the outer cylinder 102 from the discharge port 109, and the powdery sludge enters the outer cylinder 102. It is dried for the second time, and finally discharged from the discharge port 108.

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  • 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)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Sludge (AREA)

Abstract

本发明涉及一种污泥烘干机，包括烘干筒、设置于烘干筒内的主轴、沿轴向螺旋绕设在主轴上的输送叶片以及驱动主轴转动的驱动机构，所述烘干筒的两端分别设置有进料口和出料口，所述烘干筒为竖直设置，所述主轴竖直地设置在烘干筒的中心位置，所述输送叶片上设置有轴向贯穿的挤压孔，所述输送叶片在向上输送过程中湿润的污泥在挤压作用下通过挤压孔被挤压至下方，所述烘干筒的上端设置有粉碎组件。本发明通过在输送叶片上设置挤压孔，在污泥的螺旋输送过程中含水率较高的污泥被挤压至下方，使污泥在烘干筒内呈现上下循环式移动，直至干燥为止，从而形成翻炒污泥的效果，保证污泥被充分烘干，提高了烘干效率。

Description

一种污泥烘干机 技术领域
本发明涉及污泥处理设备技术领域，特别涉及一种污泥烘干机。
背景技术
目前，污泥处置的方式主要有填埋、土地利用和焚烧等。直接填埋会占用大量的土地，同时滤液会污染地下水；土地利用因污泥含水率高、运输量大、分散困难、污泥中含有有害成分等原因而受到很大的限制；焚烧方式作为一种资源化利用的方式将污泥作为燃料供能，但这种处理方式需要将污泥的含水率降低至30％—40％，否则高含水率的污泥则会因为其本身含固率低而导致热值低，进而需要耗费大量的辅助燃料，处理成本明显偏高。因此，目前为止，对城市污泥进行干化处理、降低含水率是目前污泥后续处理过程中的主要关键问题。
公开号为CN206940706U的中国实用新型专利公开了一种烟气污泥烘干机，包括：主传动机构，壳体以及用于支撑壳体的支架，壳体为卧式的柱体结构，壳体一端的上方分别设有进风口和进料口，壳体另一端的上方设有排风口，壳体另一端的下方设有排料口，主传动机构包括主传动轴及驱动机构，主传动轴穿过壳体内部并位于其中心轴处，驱动机构的动力输出端连接于主传动轴的一端且位于壳体的外部，主传动轴上安装有螺旋状的导料板，由于热量传递不均匀，在烘干过程中污泥外部往往比内部先烘干，因此这种烘干方式的烘干效率比较低。
发明内容
本发明的目的是提供一种污泥烘干机，有效提高污泥的烘干效率。
本发明的上述目的是通过以下技术方案得以实现的：一种污泥烘干机，包括烘干筒、设置于烘干筒内的主轴、沿轴向螺旋绕设在主轴上的输送叶片以及驱动主轴转动的驱动机构，所述烘干筒的两端分别设置有进料口和出料口，所述烘干筒为竖直设置，所述主轴竖直地设置在烘干筒的中心位置，所述输送叶片上设置有轴向贯穿的挤压孔，所述输送叶片在向上输送过程中湿润的污泥在挤压作用下通过挤压孔被挤压至下方，所述烘干筒的上端设置有粉碎组件。
作为优选，所述挤压孔呈上下周向交错分布。
作为优选，所述挤压孔的孔径由上往下逐渐减小。
在烘干筒的底部，污泥的含水率远高于烘干筒上部的污泥的含水率，因此底部的污泥基本能够作一定的流动，假如挤压孔的孔径过大，这种可流动的污泥则很难被向上螺旋输送，容易从挤压孔直接掉落到烘干筒底部，因此设置较小的孔保证一定量的污泥能够被向上输送；而上方的污泥由于含水率相对较低而呈团状或块状，更易被向上输送，在向上输送过程中受 到挤压而从挤压孔被挤压至下方，呈现翻炒的效果，在此过程中污泥逐渐被干燥，直至干燥成块。
作为优选，所述输送叶片包括第一叶片和第二叶片，所述第一叶片设置在主轴的上端，所述第二叶片设置在第一叶片的下方，所述第一叶片与第二叶片呈上下间隔设置，两者之间形成缓冲空间。
在经过多次翻炒后到达缓冲空间的污泥基本被烘干而呈块状，在此区域污泥停留的时间相对较长，更能充分地烘干，随着更多烘干的污泥进入，将先进入达缓冲空间的污泥向上顶入到第二叶片，经过粉碎组件的粉碎作用后有第二叶片输出。
作为优选，所述挤压孔设置在第二叶片上，所述粉碎组件设置在第一叶片的下方。
作为优选，所述第一叶片的轴向长度小于第二叶片的轴向长度，所述挤压孔由第二叶片的上端向下贯穿至其下端的1/4-1/3处。
位于底部的第二叶片不开设挤压孔，保证底部的污泥能够完全被向上输送，保证污泥在向上在输送过程中具备一定的挤压力，能够产生翻炒的效果。
作为优选，所述粉碎组件包括若干切刀，所述切刀圆周分布在主轴上。
作为优选，所述切刀的一端固定在主轴上，另一端向转动方向的后方倾斜设置，所述切刀上设置有锯齿。
作为优选，所述烘干筒的外侧设置有外筒，所述外筒与烘干筒之间形成加热区，所述外筒的上下两端分别连接有热输入管和热输出管，所述加热区通过出料口与烘干筒连通，所述外筒的下端设置有排料口。
本发明的有益效果：本发明通过在输送叶片上设置挤压孔，在污泥的螺旋输送过程中含水率较高的污泥被挤压至下方，使污泥在烘干筒内呈现上下循环式移动，直至干燥为止，从而形成翻炒污泥的效果，保证污泥被充分烘干，提高了烘干效率。
附图说明
图1是本发明实施例的结构示意图；
图2是本发明实施例中输送叶片的结构示意图；
图3是本发明实施例中粉碎组件的结构示意图；
图中：101-烘干筒，102-外筒，103-主轴，104-输送叶片，1041-第一叶片，1042-第二叶片，105-切刀，1051-锯齿，106-挤压孔，107-进料口，108-排料口，109-出料口，110-热输入管，111-热输出管。
具体实施方式
以下结合附图对本发明作进一步的详细说明。
本具体实施例仅仅是对本发明的解释，其并不是对本发明的限制，本领域技术人员在阅读完本说明书后，可以根据需要对本实施例做出没有创造性贡献的修改，但只要在本发明的权利要求范围内都受到专利法的保护。
实施例：如图1所示，一种污泥烘干机，包括烘干筒101、设置于烘干筒101内的主轴103、沿轴向螺旋绕设在主轴103上的输送叶片104以及驱动主轴103转动的驱动机构，烘干筒101为竖直设置，所述主轴103竖直地设置在烘干筒101的中心位置。驱动机构为固定在烘干筒101底部的驱动电机。
烘干筒101的两端分别设置有进料口107和出料口109，进料口107位于烘干筒101的下端，出料口109烘干筒101的上端。
烘干筒101的外侧设置有外筒102，外筒102与烘干筒101之间形成加热区，外筒102的上下两端分别连接有热输入管110和热输出管111，其中热输入管110输入高温气体，用于对烘干筒101进行加热，热输出管111用于将加热区的热气排出，实现高温气体在加热区内上下循环流动。加热区通过出料口109与烘干筒101连通，外筒102的下端设置有排料口108。烘干筒101采用导热系数较高的金属制成，外筒102的外壁包裹有保温材料。出料口109设置有阀板，阀板通过电动控制的电动推杆控制，实现间歇性地开启和关闭，使高温气体进入烘干筒101内，或使烘干筒101内干燥后的污泥排入到加热区，并通过排料口108排出。
如图2所示，输送叶片104包括第一叶片1041和第二叶片1042，第一叶片1041设置在主轴103的上端第二叶片1042设置在第一叶片1041的下方，第一叶片1041的轴向长度小于第二叶片1042的轴向长度。第一叶片1041与第二叶片1042呈上下间隔设置。烘干筒101位于第一叶片1041与第二叶片1042之间的区域为缓冲空间，污泥由第二叶片1042向上输送至缓冲空间后会暂存在此处，随着下方的污泥持续的输入，直至将该空间内的污泥向上输送到第二叶片1042，由第二叶片1042输出。由此污泥大大增加了在烘干筒101内的停留时间，保证充烘干。
第二叶片1042上设置有挤压孔106，挤压孔106为轴向贯穿第二叶片1042，挤压孔106由第二叶片1042的上端向下贯穿至其下端的1/4-1/3处。挤压孔106呈上下周向交错分布，即上下相邻两片叶片上的挤压孔106呈圆周分布，不处于同一轴线上。第二叶片1042在向上输送过程中湿润的污泥在挤压作用下通过挤压孔106被挤压至下方。
其中挤压孔106的孔径由上往下逐渐减小，在烘干筒101的底部，污泥的含水率远高于烘干筒上部的污泥的含水率，因此底部的污泥基本能够作一定的流动，假如挤压孔的孔径过大，这种可流动的污泥则很难被向上螺旋输送，容易从挤压孔直接掉落到烘干筒101底部， 因此设置较小的孔保证一定量的污泥能够被向上输送；而上方的污泥由于含水率相对较低而呈团状或块状，更易被向上输送，在向上输送过程中受到挤压而从挤压孔被挤压至下方，呈现翻炒的效果，在此过程中污泥逐渐被干燥，直至干燥成块。
如图2和图3所示，烘干筒101的上端设置有粉碎组件，粉碎组件设置在第一叶片1041的下方。粉碎组件包括若干切刀105，切刀105圆周分布在主轴103上。切刀105的一端固定在主轴103上，另一端向转动方向的后方倾斜设置，切刀105上设置有锯齿1051。污泥在烘干后往往会结成块状，此时即使在挤压作用下也无法穿过挤压孔106往下移动，因此烘干后的污泥集聚在缓冲空间处，并逐渐向上顶升，直至与粉碎组件，切刀105将污泥切碎并通过第一叶片1041向上输送，最后从出料口109进入外筒102内，粉状的污泥进入外筒102内后被进行二次烘干，最后从排料口108排出。

Claims (9)

  1. 一种污泥烘干机，包括烘干筒(101)、设置于烘干筒(101)内的主轴(103)、沿轴向螺旋绕设在主轴(103)上的输送叶片(104)以及驱动主轴(103)转动的驱动机构，所述烘干筒(101)的两端分别设置有进料口(107)和出料口(109)，其特征在于：所述烘干筒(101)为竖直设置，所述主轴(103)竖直地设置在烘干筒(101)的中心位置，所述输送叶片(104)上设置有轴向贯穿的挤压孔(106)，所述输送叶片(104)在向上输送过程中湿润的污泥在挤压作用下通过挤压孔(106)被挤压至下方，所述烘干筒(101)的上端设置有粉碎组件。
  2. 根据权利要求1所述的一种污泥烘干机，其特征在于：所述挤压孔(106)呈上下周向交错分布。
  3. 根据权利要求2所述的一种污泥烘干机，其特征在于：所述挤压孔(106)的孔径由上往下逐渐减小。
  4. 根据权利要求1所述的一种污泥烘干机，其特征在于：所述输送叶片(104)包括第一叶片(1041)和第二叶片(1042)，所述第一叶片(1041)设置在主轴(103)的上端，所述第二叶片(1042)设置在第一叶片(1041)的下方，所述第一叶片(1041)与第二叶片(1042)呈上下间隔设置，两者之间形成缓冲空间。
  5. 根据权利要求4所述的一种污泥烘干机，其特征在于：所述挤压孔(106)设置在第二叶片(1042)上，所述粉碎组件设置在第一叶片(1041)的下方。
  6. 根据权利要求5所述的一种污泥烘干机，其特征在于：所述第一叶片(1041)的轴向长度小于第二叶片(1042)的轴向长度，所述挤压孔(106)由第二叶片(1042)的上端向下贯穿至其下端的1/4-1/3处。
  7. 根据权利要求1所述的一种污泥烘干机，其特征在于：所述粉碎组件包括若干切刀(105)，所述切刀(105)圆周分布在主轴(103)上。
  8. 根据权利要求7所述的一种污泥烘干机，其特征在于：所述切刀(105)的一端固定在主轴(103)上，另一端向转动方向的后方倾斜设置，所述切刀(105)上设置有锯齿(1051)。
  9. 根据权利要求1所述的一种污泥烘干机，其特征在于：所述烘干筒(101)的外侧设置有外筒(102)，所述外筒(102)与烘干筒(101)之间形成加热区，所述外筒(102)的上下两端分别连接有热输入管(110)和热输出管(111)，所述加热区通过出料口(109)与烘干筒(101)连通，所述外筒(102)的下端设置有排料口(108)。
PCT/CN2021/084816 2020-11-19 2021-04-01 一种污泥烘干机 WO2022105089A1 (zh)

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