CN110395874B - Multi-stage high-speed spiral line type extrusion drying device for urban sludge - Google Patents
Multi-stage high-speed spiral line type extrusion drying device for urban sludge Download PDFInfo
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- CN110395874B CN110395874B CN201910669964.8A CN201910669964A CN110395874B CN 110395874 B CN110395874 B CN 110395874B CN 201910669964 A CN201910669964 A CN 201910669964A CN 110395874 B CN110395874 B CN 110395874B
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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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
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- Hydrology & Water Resources (AREA)
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- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The utility model discloses a multi-stage high-speed spiral line type extrusion drying device for town sludge, which comprises a drying chamber, a sludge input mechanism and a sludge output mechanism, wherein a heating space is arranged in the drying chamber, a multi-stage spiral extrusion mechanism is arranged in the heating space, the multi-stage spiral extrusion mechanism comprises a plurality of spiral line type extruders which are arranged in an up-down layered manner, hot air spray heads are correspondingly arranged below each layer of spiral line type extruder, and the hot air spray heads spray hot air to linear sludge strips extruded by the corresponding spiral line type extruders; the drying chamber is also connected with a hot air circulating system, the hot air circulating system comprises an air outlet communicated with the heating space of the drying chamber, the air outlet is connected with a hot air circulating pipeline, and the hot air circulating pipeline is connected with a hot air spray head. The utility model is suitable for drying town sludge, the spiral linear extruder extrudes the sludge into linear sludge strips, the heating area can be enlarged in the heating space, the heat exchange rate is enhanced, the sludge dehydration is accelerated, and the dehydration rate is improved.
Description
Technical Field
The utility model relates to the technical field of sludge drying, in particular to a multistage high-speed spiral line type extrusion drying device for urban sludge.
Background
The sludge is a porous medium substance with high moisture content, and the moisture content of the untreated sludge is up to more than 95 percent. Especially, town sludge is difficult to dehydrate, consumes large energy, emits foul smell and pollutes the environment because the combined moisture and the free moisture of the town sludge are both larger than those of common dry matters, and the town sludge has the physical form like a micelle and large cohesive force. With the increasing environmental requirements and the acceleration of urbanization construction steps, the treatment of sludge in cities and towns becomes a difficult problem to be rescued, and the reduction of the water content of the sludge is the premise of sludge reduction and resource utilization (agriculture, incineration and the like).
The utility model discloses a screw extrusion sludge dewaterer, sludge box including the tube-shape that the level was placed, sludge box's right-hand member has the ascending mud entry of opening, and the sludge outlet has been seted up to this sludge box's left end, and this sludge box's lower part comprises the filter screen be provided with the extrusion screw rod of taking the flabellum in the sludge box, this extrusion screw rod's left end links to each other with drive arrangement be provided with first wiring end on the extrusion screw rod, be provided with the second wiring end on the filter screen. According to the utility model, the positive and negative charges are respectively connected to the extrusion screw and the filter screen, so that the dehydration efficiency is greatly improved, and the dehydration device has the characteristics of stable dehydration, lower noise, low modification cost and the like.
For example, the utility model patent of publication No. CN101913750A discloses a sludge granulation drying device and method, the device comprises a spiral extrusion particle forming machine, a spouted fluidized bed and a dried sludge particle bin, the spiral extrusion particle forming machine comprises a transmission shaft, a spiral feeder, a sludge extrusion forming orifice plate and a rotary blade, the method is characterized in that a middle partition plate divides the spouted fluidized bed into a spouted bed and a fluidized bed which are communicated up and down, wet sludge particles from the spiral extrusion particle forming machine enter the spouted bed from the surface of the spouted bed layer downwards, sludge forming particles after primary drying flow into the bottom of the fluidized bed from an opening at the lower part of the spouted bed, the other part of hot gas medium enters the fluidized bed from a fluidizing air inlet to carry out deep drying on the sludge particles, the dried sludge particles move upwards from the bottom of the fluidized bed layer to the surface of the fluidized bed layer, and finally overflow out of the fluidized bed, and (4) entering a dried sludge particle bin.
The utility model discloses a steam type spiral sludge dewaterer, including spiral extrusion room, spiral extrusion room one end is equipped with into mud device, and the other end is equipped with row mud device, and the periphery in spiral extrusion room is equipped with closed housing, and the downside in spiral extrusion room is equipped with the filtrating and collects the fill, is equipped with steam heating system in the spiral extrusion room. The utility model can complete the dehydration and drying of the sludge at one time, reduce the equipment investment amount, save the occupied area and reduce the material transfer, and is suitable for carrying out deep dehydration treatment on the sludge with large treatment capacity at one time.
However, the technical scheme still has the problems of large energy consumption and poor dehydration effect.
Disclosure of Invention
The utility model aims to provide a multi-stage high-speed spiral line type extrusion drying device for town sludge.
In order to solve the technical problems, the utility model adopts the following technical scheme:
a multi-stage high-speed spiral line type extrusion drying device for urban sludge comprises a drying chamber, a sludge input mechanism and a sludge output mechanism, wherein a heating space is arranged in the drying chamber, a multi-stage spiral extrusion mechanism is arranged in the heating space and comprises a plurality of spiral line type extruders which are arranged in an up-down layered mode, sludge is extruded into line type sludge strips by the spiral line type extruders on the upper layer, the linear type sludge strips are discharged from a discharge port and fall into a feed port for the spiral line type extrusion on the adjacent lower layer, hot air spray heads are correspondingly arranged below each layer of spiral line type extruders, and the hot air spray heads spray hot air to the line type sludge strips extruded by the corresponding spiral line type extruders;
wherein the feed inlet of the spiral-line extruder at the uppermost layer is connected with the sludge input mechanism, and the discharge outlet of the spiral-line extruder at the lowermost layer is connected with the sludge output mechanism;
the drying chamber is also connected with a hot air circulating system, the hot air circulating system comprises an air outlet communicated with the heating space of the drying chamber, the air outlet is connected with a hot air circulating pipeline, and the hot air circulating pipeline is connected with a hot air spray head.
And a hot air circulating pump is arranged on the hot air circulating pipeline.
And a hot air circulation control valve is arranged on the hot air circulation pipeline.
An exhaust pipeline is connected to the hot air circulation pipeline, and an exhaust control valve is arranged on the exhaust pipeline.
The heating space is formed by surrounding the heating layer arranged on the heating space, and a heat preservation layer is further surrounded on the heating layer.
The heating layer is of a heat pipe type structure.
In the multi-stage screw extrusion mechanism, a feed inlet of the screw linear extruder at the uppermost layer is positioned outside the heating space, and a discharge outlet of the screw linear extruder is positioned in the heating space; the feed inlets and the discharge outlets of the other spiral line type extruders are positioned in the heating space.
The sludge input mechanism comprises a sludge input pipeline connected with a feed inlet of the spiral line type extruder at the uppermost layer, and a sludge input pump is arranged on the sludge input pipeline;
the sludge output mechanism comprises a closed discharger which is arranged corresponding to the discharge hole of the lowest layer spiral line type extruder.
The inner wall of the heating space is provided with a non-stick coating.
The air outlet is positioned at the upper half part of the heating space.
The utility model has the beneficial effects that:
1. according to the utility model, a heating space is arranged in the drying chamber, a multi-stage spiral extrusion mechanism is arranged in the heating space, a spiral linear extruder extrudes sludge into linear sludge strips, the linear sludge strips are discharged from a discharge port, and the linear sludge strips can be heated by friction in the extrusion molding process to obtain rapid dehydration; meanwhile, the sludge is extruded into linear sludge strips by the spiral linear extruder, so that the heating area can be enlarged in a heating space, the heat exchange rate is enhanced, the sludge dehydration is accelerated, and the dehydration rate is improved; and the falling linear sludge strips are also washed by strong hot air sprayed by the hot air spray head, so that the heat exchange rate can be further enhanced, and the dehydration rate is improved.
The drying chamber is also connected with a hot air circulating system, hot air in the heating space can be circularly guided to the hot air spray head through a hot air circulating pipeline, the hot air is recycled, the energy consumption is low, the heat loss is small, no odor overflows in the drying process, and the environmental protection performance is good. And the air outlet is positioned at the upper half part of the heating space, so that the exchange efficiency can be improved.
2. The multistage screw extrusion mechanism comprises a plurality of screw linear extruders which are arranged up and down in a layered mode, so that the conveying path and conveying time of sludge in the drying chamber can be prolonged, the sludge can be dried by sufficient hot air, and the drying time and drying efficiency are improved.
3. The heating space is formed by surrounding the heating layer, and the heating layer is further surrounded by the insulating layer, so that the energy consumption is low, and the heat loss is small. The inner wall of the heating space is also provided with a non-stick coating which can prevent sludge from adhering.
4. The sludge input mechanism comprises a sludge input pipeline connected with a feed inlet of the spiral line type extruder at the uppermost layer, and a sludge input pump is arranged on the sludge input pipeline; the sludge output mechanism comprises a closed discharger which is correspondingly arranged with the discharge hole of the lowest layer spiral line type extruder, and closed feeding and discharging are conveniently realized.
5. In the utility model, the feed inlet of the spiral line type extruder at the uppermost layer is positioned outside the heating space, and the discharge outlet of the spiral line type extruder is positioned in the heating space; the feed inlets and the discharge outlets of other spiral line type extruders are positioned in the heating space, so that the heat loss is reduced as much as possible on the premise that all the line type sludge strips are in the heating space, and the resource utilization rate is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The following detailed description of embodiments of the utility model refers to the accompanying drawings.
As shown in figure 1, the town sludge multistage high-speed spiral line type extrusion drying device comprises a drying chamber, a sludge input mechanism 1 and a sludge output mechanism 14, wherein a heating space 5 is arranged in the drying chamber. In this embodiment, heating space 5 is enclosed by the heat pipe formula zone of heating 3 that surrounds its setting and closes and form, and heat pipe formula zone of heating 3 still surrounds outward and is equipped with heat preservation 2, and its energy consumption is low, the heat loss is little. The inner wall of the heating space 5 is also provided with a nano non-stick coating which can prevent sludge adhesion.
The heating space 5 is internally provided with a multi-stage screw extrusion mechanism which can be set to be two-stage, three-stage or more than three-stage according to the drying requirement. The multistage screw extrusion mechanism of this embodiment includes the screw line type extruder of three-level upper and lower layering arrangement, is screw line type extruder 4, screw line type extruder 7 and screw line type extruder 9 respectively to can prolong the delivery path and the transit time of mud in the drying chamber, make mud can receive sufficient hot-blast drying, improve drying time and drying efficiency. The upper layer spiral line type extruder extrudees mud for the line type mud strip and discharges from the discharge gate to fall into the feed inlet of adjacent lower floor spiral line type extruder, and the below of every layer of spiral line type extruder all corresponds and has arranged hot air shower nozzle, is hot air shower nozzle 5, hot air shower nozzle 8 and hot air shower nozzle 10 respectively, and hot air shower nozzle is to the line type mud strip department blowout hot-blast that corresponds the spiral line type extruder and extrude.
The feeding hole of the spiral-line-type extruding machine 4 on the uppermost layer is connected with the sludge input mechanism 1, the sludge input mechanism 1 comprises a sludge input pipeline connected with the feeding hole of the spiral-line-type extruding machine 4, a sludge input pump is arranged on the sludge input pipeline in a matched mode, the discharging hole of the spiral-line-type extruding machine 9 on the lowermost layer is connected with the sludge output mechanism 14, the sludge output mechanism 14 is a closed discharging device correspondingly arranged with the discharging hole of the spiral-line-type extruding machine 9, and closed feeding and discharging are conveniently achieved.
In this embodiment, the feed inlet of the spiral extruder 4 is located outside the heating space, and the discharge port thereof is located in the heating space 5, and the feed inlets and the discharge ports of the spiral extruder 7 and the spiral extruder 9 are both located in the heating space 5, so as to ensure that the linear sludge strips are all in the heating space, thereby reducing the heat loss as much as possible and improving the resource utilization rate.
The drying chamber is also connected with a hot air circulating system, the hot air circulating system comprises an air outlet communicated with the heating space 8 of the drying chamber, and the air outlet is positioned at the upper half part of the heating space 5, so that the exchange efficiency can be improved. The air outlet is connected with a hot air circulating pipeline, and the hot air circulating pipeline is connected with hot air spray heads 5, 8 and 10. The hot air circulation pipeline is also provided with a hot air circulation pump 13 and a hot air circulation control valve 11.
An exhaust pipeline is connected to the hot air circulation pipeline, an exhaust control valve 12 is arranged on the exhaust pipeline, and when hot air circulates, the exhaust control valve 12 is closed, and the hot air circulation control valve 11 is opened; when the humidity is increased greatly after the hot air is circulated to a certain degree, the exhaust control valve 12 can be opened and the hot air circulation control valve 11 can be closed, and the hot air with higher humidity is intensively discharged and treated.
The utility model is especially suitable for drying town sludge, and sludge with water content of more than 35 percent is selected to enter the device and can be dried to the water content of about 25 percent. In this example, the water content of the sludge entering the apparatus was selected to be 35%.
The working principle of the utility model is as follows: sludge firstly enters a feed inlet of a spiral-line type extruder 4 from a sludge input mechanism 1, the spiral-line type extruder 4 extrudes the sludge into linear sludge strips, and the linear sludge strips are discharged from a discharge outlet, and the linear sludge strips can be heated by friction in the extrusion molding process to obtain quick dehydration; and the extruded linear sludge strips fall into a feed inlet of a spiral linear extruder 7, and the falling linear sludge strips are also washed by strong hot air sprayed by a hot air spray head 6, so that the heat exchange rate can be further enhanced, and the dehydration rate is improved.
Then the screw linear extruder 7 extrudes the sludge into linear sludge strips, the linear sludge strips are discharged from a discharge port and fall into a feed port of the screw linear extruder 9, and the linear sludge strips are scoured by strong hot air sprayed by the hot air spray nozzle 8 in the process; then, the screw line type extruder 9 extrudes the sludge into line type sludge strips, the linear type sludge strips are discharged from the discharge port and fall into the closed discharging device, and in the process, the line type sludge strips are washed by strong hot air sprayed by the hot air spray nozzle 10, and the sludge is continuously dried and dehydrated.
Meanwhile, the linear sludge strips extruded by the spiral linear extruders 4, 7 and 9 are continuously extruded and conveyed to a lower stage in the heating space 5, so that the linear sludge strips can increase the heating area in the heating space, enhance the heat exchange rate, accelerate sludge dehydration and improve the dehydration rate.
The drying chamber is also connected with a hot air circulating system, hot air in the heating space 5 can be circularly guided to the hot air spray heads 6, 8 and 10 through a hot air circulating pipeline, the hot air is recycled, the energy consumption is low, the heat loss is small, no odor overflows in the drying process, and the environment friendliness is good.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the utility model and it is intended to cover in the claims the utility model as defined in the appended claims.
In the description of the present invention, it is to be understood that the terms "front", "rear", "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the scope of the present invention.
Claims (10)
1. The utility model provides a multistage high-speed helix type extrusion drying device of town's mud, includes drying chamber, mud input mechanism and mud output mechanism, its characterized in that: the drying chamber is internally provided with a heating space, a multi-stage screw extrusion mechanism is arranged in the heating space, the multi-stage screw extrusion mechanism comprises a multi-stage screw linear extruder which is arranged in an up-down layered manner, the upper-layer screw linear extruder extrudes sludge into linear sludge strips, the linear sludge strips are discharged from a discharge port and fall into a feed port for adjacent lower-layer screw linear extrusion, hot air spray heads are correspondingly arranged below each layer of screw linear extruder, and the hot air spray heads spray hot air to the linear sludge strips extruded by the corresponding screw linear extruder;
wherein the feed inlet of the spiral-line extruder at the uppermost layer is connected with the sludge input mechanism, and the discharge outlet of the spiral-line extruder at the lowermost layer is connected with the sludge output mechanism;
the drying chamber is also connected with a hot air circulating system, the hot air circulating system comprises an air outlet communicated with the heating space of the drying chamber, the air outlet is connected with a hot air circulating pipeline, and the hot air circulating pipeline is connected with a hot air spray head;
the device is suitable for drying town sludge, and sludge with the water content of more than 35 percent is selected to enter the device.
2. The town sludge multistage high-speed spiral line type extrusion drying device according to claim 1, which is characterized in that: and a hot air circulating pump is arranged on the hot air circulating pipeline.
3. The town sludge multistage high-speed spiral line type extrusion drying device according to claim 1 or 2, which is characterized in that: and a hot air circulation control valve is arranged on the hot air circulation pipeline.
4. The town sludge multistage high-speed spiral line type extrusion drying device according to claim 3, which is characterized in that: an exhaust pipeline is connected to the hot air circulation pipeline, and an exhaust control valve is arranged on the exhaust pipeline.
5. The town sludge multistage high-speed spiral line type extrusion drying device according to claim 1, which is characterized in that: the heating space is formed by surrounding the heating layer arranged on the heating space, and a heat preservation layer is further surrounded on the heating layer.
6. The town sludge multistage high-speed spiral line type extrusion drying device according to claim 5, which is characterized in that: the heating layer is of a heat pipe type structure.
7. The town sludge multistage high-speed spiral line type extrusion drying device according to claim 1, which is characterized in that: in the multi-stage screw extrusion mechanism, a feed inlet of the screw linear extruder at the uppermost layer is positioned outside the heating space, and a discharge outlet of the screw linear extruder is positioned in the heating space; the feed inlets and the discharge outlets of the other spiral line type extruders are positioned in the heating space.
8. The town sludge multistage high-speed spiral line type extrusion drying device according to claim 1, which is characterized in that: the sludge input mechanism comprises a sludge input pipeline connected with a feed inlet of the spiral line type extruder at the uppermost layer, and a sludge input pump is arranged on the sludge input pipeline;
the sludge output mechanism comprises a closed discharger which is arranged corresponding to the discharge hole of the lowest layer spiral line type extruder.
9. The town sludge multistage high-speed spiral line type extrusion drying device according to claim 1, which is characterized in that: the inner wall of the heating space is provided with a non-stick coating.
10. The town sludge multistage high-speed spiral line type extrusion drying device according to claim 1, which is characterized in that: the air outlet is positioned at the upper half part of the heating space.
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| CN201910669964.8A CN110395874B (en) | 2019-07-24 | 2019-07-24 | Multi-stage high-speed spiral line type extrusion drying device for urban sludge |
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| CN201910669964.8A CN110395874B (en) | 2019-07-24 | 2019-07-24 | Multi-stage high-speed spiral line type extrusion drying device for urban sludge |
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| CN110395874B true CN110395874B (en) | 2022-01-25 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3954366A (en) * | 1975-01-06 | 1976-05-04 | Fields Reuben T | Two-stage single screw extrusion apparatus |
| CN101913750A (en) * | 2010-08-11 | 2010-12-15 | 东南大学 | Sludge granulation and drying device and method |
| CN105253978A (en) * | 2015-11-13 | 2016-01-20 | 黑龙江中科瑞合环保技术服务有限公司 | Mixed dewatering device and dewatering method for replacing flocculating agents with straw |
| CN205773998U (en) * | 2016-05-20 | 2016-12-07 | 东莞市绿革环保科技有限公司 | Highly effective sludge drying system |
| CN106390555A (en) * | 2016-10-11 | 2017-02-15 | 鹤壁职业技术学院 | Automatic screw-extrusion dewatering device |
| CN109516668A (en) * | 2018-12-19 | 2019-03-26 | 湖南大学 | A kind of new type low temperature hot wind sludge drying machine |
-
2019
- 2019-07-24 CN CN201910669964.8A patent/CN110395874B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3954366A (en) * | 1975-01-06 | 1976-05-04 | Fields Reuben T | Two-stage single screw extrusion apparatus |
| CN101913750A (en) * | 2010-08-11 | 2010-12-15 | 东南大学 | Sludge granulation and drying device and method |
| CN105253978A (en) * | 2015-11-13 | 2016-01-20 | 黑龙江中科瑞合环保技术服务有限公司 | Mixed dewatering device and dewatering method for replacing flocculating agents with straw |
| CN205773998U (en) * | 2016-05-20 | 2016-12-07 | 东莞市绿革环保科技有限公司 | Highly effective sludge drying system |
| CN106390555A (en) * | 2016-10-11 | 2017-02-15 | 鹤壁职业技术学院 | Automatic screw-extrusion dewatering device |
| CN109516668A (en) * | 2018-12-19 | 2019-03-26 | 湖南大学 | A kind of new type low temperature hot wind sludge drying machine |
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