CN205590537U - Sludge drying tower - Google Patents
Sludge drying tower Download PDFInfo
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- CN205590537U CN205590537U CN201620337976.2U CN201620337976U CN205590537U CN 205590537 U CN205590537 U CN 205590537U CN 201620337976 U CN201620337976 U CN 201620337976U CN 205590537 U CN205590537 U CN 205590537U
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- sludge
- mud
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- desiccation apparatus
- tower body
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Abstract
The utility model relates to a sludge drying tower, including the tower body, be equipped with sludge inlet and sludge outlet on the tower body, top -down has arranged two -stage mummification device in proper order in the tower body, and higher level's mummification device is connected with sludge inlet, and subordinate's mummification device is connected with the sludge outlet, and two -stage mummification device passes through mud circulation path connection. The utility model discloses a two duanganization techniques to arrange the coupling of two -stage mummification device in same tower body, thereby can effectively reduce equipment area, mud is the top -down operation in the tower body, with the help of the gravity of mud self, can effectively reduce the power consumption that mud moved between two -stage mummification device.
Description
Technical field
This utility model belongs to environmental technology field, is specifically related to a kind of sludge drying tower, for the mummification of municipal sludge, especially
It it is the mummification of mud produced by Sewage Plant.
Background technology
By 2015, county town was the most built urban wastewater treatment firm, annual sewage disposal for all cities of China and the overwhelming majority
The sewage disposal total amount of factory is more than 480 billion cubic meters, and the annual moisture content that produces is that the mud of 80% is more than 33,000,000 tons.Although
Treatment rate of domestic sewage has reached 90%, but the specific resistance to filtration of town sewage plant is but not kept pace with step, mud innoxious
Disposal rate is only about 56%, has the mud of about 15% to fail to understand whereabouts.These data and the target " city in " 12 " planning
The sewage sludge harmlessness handling rate in town requires to reach 70%, and the sewage sludge harmlessness disposing rate of big and medium-sized cities need to reach 80% " the least
Distance.As can be seen here, the concept of traditional " the light mud of heavy water " does not obtains radical change yet.Nearly half mud is without nothing
Evilization processes, and a large amount of organic and energy in mud is without recycling, does not only exist the environmental risk of secondary pollution,
Waste resource.Therefore, China's specific resistance to filtration arduous task is heavy, and situation is the severeest.
At present, the treatment technology of mud is divided into pre-treatment, intermediate treatment and three steps of terminal processes.Wherein, pre-treatment is main
Being by concentrating and dehydrating operations, concentration process makes secondary sludge and the moisture content first heavy dirt more than 97% that moisture content is more than 99%
Mud is changed into moisture content 95～the mud of 97%, then through mechanical dehydration, makes the moisture content of mud be down to 75～80%.Terminal
Process several ways such as being mainly burning, sanitary landfills, recycling；For China, recycling and sanitary landfills
Processing mode proportion higher, respectively reached 45% and 35%.But, the mud of moisture content 80% still has the strongest
Mobility and bigger volume, do not meet the requirement of the terminal processing techniques such as landfill, burning, recycling, need to be by mud
Moisture content is down to less than 60%.Therefore, also needed through intermediate treatment before mud terminal processes, namely sludge drying, will
The moisture content of dewatered sludge is down to less than 60% by 80%.
Sludge drying technique mainly has the techniques such as low temperature sheet frame dehydration and drying, fluid bed mummification, two sections of mummification.Sheet frame drying technique
Then need to add conditioner (such as quick lime, FeCl3Deng), carry out sheet frame dehydrating operations the most again, the moisture content of mud can be down to
35～60%.Fluid bed drying technique is then a heat drying technology, mud is cut into little granule, together enters with fluidizing gas
Keep not stopping transport in dynamic dry grain bed, at a temperature of about 85 DEG C, can be by sludge drying to moisture content less than 10%.Two
Section drying technique is also a kind of heat drying technology, sludge drying is divided into two steps, can be the direct mummification of two steps, it is possible to
So that a step indirectly drying and the direct mummification of a step combine, utilize thermal medium that mud is heated, moisture percentage in sewage sludge can be down to 10%
Below.
Current sludge drying technique is primarily present problems with: be easily caused volatile organic matter in (1) mud drying process
(VOCs) generation, causes secondary pollution, increases subsequent treatment cost；(2) complex process, occupation area of equipment is relatively big,
Energy consumption is higher.
Utility model content
This utility model embodiment provides a kind of sludge drying tower, at least can solve the segmental defect of prior art.
This utility model embodiment relates to a kind of sludge drying tower, and including tower body, described tower body is provided with sludge inlet and mud goes out
Mouthful, it being sequentially arranged two-stage desiccation apparatus in described tower body from top to bottom, higher level's desiccation apparatus is connected with described sludge inlet, under
Level desiccation apparatus is connected with described sludge outlet, and two-stage desiccation apparatus is connected by sludge stream circulation passage.
As one of embodiment, described higher level's desiccation apparatus is indirectly drying device.
As one of embodiment, described indirectly drying device includes that shell-and-tube heat exchanger, described shell-and-tube heat exchanger have shell side and be situated between
Matter entrance, shell side media outlet, tube side medium inlet and steam outlet, wherein, described shell side medium inlet and described mud
Entrance connect, described shell side media outlet connects with described sludge stream circulation passage, described tube side medium inlet be located at described tower body
On first thermal medium entrance connection, described steam outlet extend out to outside described tower body.
As one of embodiment, described indirectly drying device also includes the dirt on the heat exchanger tube for scraping described shell-and-tube heat exchanger
The scraper mechanism of mud and drive the drive mechanism that described scraper mechanism works.
As one of embodiment, described subordinate desiccation apparatus is direct desiccation apparatus.
As one of embodiment, described direct desiccation apparatus includes that housing, described housing enclose and sets formation one direct heat exchanging chamber, described
Housing is provided with heating sludge inlet, dewatered sludge outlet, the second thermal medium entrance and gas outlet, described heating sludge inlet
Connecting with described sludge stream circulation passage, the outlet of described dewatered sludge connects with described sludge outlet, and described gas outlet extend out to institute
State outside tower body.
As one of embodiment, it is provided with in described housing and mud is exported to described dewatered sludge by the transport of described heating sludge inlet
Move the mobile heat exchange mechanisms of heat exchange realizing mud.
As one of embodiment, described mobile heat exchange mechanisms includes a plurality of conveyer belt, a plurality of described conveyer belt in described housing from
Upper and under arrange in Zigzag type structure.
As one of embodiment, described second thermal medium entrance connects with the thermal medium outlet of described indirectly drying device.
As one of embodiment, it is provided with for making mud molding to increase the molding dress of heat exchange area in described sludge stream circulation passage
Put.
This utility model embodiment at least achieves following beneficial effect: this utility model uses two sections of drying techniques, and by two-stage
Desiccation apparatus coupled arrangement is in same tower body, thus can effectively reduce occupation area of equipment；Mud is transported in tower body from top to bottom
OK, by the gravity of mud self, the power consumption that mud runs between two-stage desiccation apparatus can effectively be reduced.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment or existing
In technology description, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this practicality
Some novel embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
The structural representation of the sludge drying tower that Fig. 1 provides for this utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clear,
It is fully described by, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.
Based on the embodiment in this utility model, those of ordinary skill in the art are obtained on the premise of not making creative work
All other embodiments, broadly fall into the scope of this utility model protection.
Such as Fig. 1, this utility model embodiment provides a kind of sludge drying tower, and including tower body 1, described tower body 1 is provided with mud and enters
Mouth 2 and sludge outlet 8, sludge inlet 2 is positioned at tower body 1 top, and sludge outlet 8 is positioned at tower body 1 bottom, in tower body 1 certainly
Upper and under be sequentially arranged two-stage desiccation apparatus, higher level's desiccation apparatus is connected with described sludge inlet 2, subordinate's desiccation apparatus and institute
Stating sludge outlet 8 to connect, two-stage desiccation apparatus is connected by sludge stream circulation passage (illustrating, do not mark).Treat the dirt of mummification
Mud is promoted to sludge inlet 2 by sludge pump, sludge inlet 2 after carrying out first order drying and other treatment in entering higher level's desiccation apparatus,
Enter in subordinate's desiccation apparatus by sludge stream circulation passage, carry out second level drying and other treatment, after two-stage drying and other treatment, can be formed
Dewatered sludge, this dewatered sludge is discharged outside tower body 1 by sludge outlet 8.The present embodiment uses two sections of drying techniques, and by two-stage
Desiccation apparatus coupled arrangement is in same tower body 1, thus can effectively reduce occupation area of equipment；Mud in tower body 1 from and
Lower operation, by the gravity of mud self, can effectively reduce the power consumption that mud runs between two-stage desiccation apparatus.
Continue the structure of above-mentioned sludge drying tower, in above-mentioned two-stage desiccation apparatus, two-stage indirectly drying device or two-stage can be used straight
Connect desiccation apparatus or structure that one-level indirectly drying device desiccation apparatus direct with one-level concatenates, according to pending sludge characteristics etc.
Select.For direct desiccation apparatus, it typically uses heat-carrying gas to carry out contact heat-exchanging as thermal medium and mud；Due to
During the hot gas of high temperature and mud direct contact heat transfer, it is easily caused the generation of volatile organic matter (VOCs), causes secondary
Polluting, increase subsequent treatment cost, therefore, in the present embodiment, described higher level's desiccation apparatus is indirectly drying device, the hottest
Medium and mud carry out indirect heat exchange, can avoid the generation of above-mentioned situation.
As preferably, in the present embodiment, described indirectly drying device includes shell-and-tube heat exchanger 5, described shell-and-tube heat exchanger 5
Having shell side medium inlet, shell side media outlet, tube side medium inlet and steam outlet 6, wherein, described shell side medium enters
Mouth connects with described sludge inlet 2, and described shell side media outlet connects with described sludge stream circulation passage, described tube side medium inlet
Connecting with the first thermal medium entrance 7 being located on described tower body 1, described steam outlet 6 extend out to outside described tower body 1.Nothing
Doubt: above-mentioned shell side medium inlet is the most extended forms above-mentioned sludge inlet 2, above-mentioned tube side medium inlet to tower body 1 is outer
The most extended form above-mentioned first thermal medium entrance 7 to tower body 1 is outer, above-mentioned steam outlet 6 also can be located on tower body 1
Steam (vapor) outlet 6 connect to discharge water vapour.Mud is entered in shell-and-tube heat exchanger 5 by sludge inlet 2, and thermal medium is by first
Thermal medium entrance 7 carries out in shell-and-tube heat exchanger 5, and mud walks shell side, and thermal medium walks tube side, in indirect heat exchange mode to mud
Carry out drying and other treatment.Above-mentioned shell side medium inlet and steam outlet 6 are all arranged in the top of shell-and-tube heat exchanger 5, and shell side is situated between
Matter outlet is arranged in the bottom of shell-and-tube heat exchanger 5；Tube side medium inlet can be disposed at bottom or the top of shell-and-tube heat exchanger 5,
I.e. tube side medium is entered by the heat exchanger tube of subordinate and forms countercurrent heat exchange method with shell side medium, or is entered by the heat exchanger tube of higher level
Form following current heat exchange mode with shell side medium, can select according to practical situation.
Further preferably, owing to mud is in shell-and-tube heat exchanger 5 and in thermal medium heat transfer process, easy mummification is bonded in heat exchanger tube
On, affect follow-up heat transfer effect, and the response rate of reduction mud, therefore, described indirectly drying device also includes for scraping
The scraper mechanism of the mud on the heat exchanger tube of described shell-and-tube heat exchanger 5 and drive the drive mechanism 3 that described scraper mechanism works.
Such as Fig. 1, above-mentioned scraper mechanism includes a rotary screw 4 and multiple turning arm (not shown), the quantity of turning arm and heat exchanger tube
Quantity is identical and one_to_one corresponding configures, and each turning arm is respectively and fixedly provided with at least one scraper (not shown), and each turning arm is the most fixing
On rotary screw 4, this rotary screw 4 drive each turning arm to rotate, and then drive scraper motion, carry out striking off bonding dirt
Mud operates, and meanwhile, the rotary motion of scraper and turning arm also can increase the mobility of mud and the dispersion in heat exchanger, from
And improve heat exchange efficiency further.To this end, each scraper should rub not coming in contact with heat-transfer surface close proximity to corresponding heat-transfer surface
As far as possible many on the premise of wiping strike off bonding mud.The heat exchanger tube of above-mentioned shell-and-tube heat exchanger 5 can be that in the vertical direction is snakelike
Arrange, it is possible to for the most snakelike layout, corresponding turning arm and the arrangement of scraper are the most different.In view of dirt
Mud in shell-and-tube heat exchanger 5 for move from top to bottom, for increasing the contact probability of mud and heat exchanger tube, in the present embodiment, excellent
Elect the mode using the snakelike layout of heat exchanger tube in the vertical direction as so that mud can connect with each heat exchanger tube in dropping process successively
Touch, thus improve heat transfer effect.Accordingly, each turning arm is the most horizontally disposed, and each scraper is preferably vertically arranged, and blade is lateral
Lower near corresponding heat exchanger tube.Further, above-mentioned shell-and-tube heat exchanger 5 uses multiple shell side medium inlet, i.e. at tower body 1
Being provided with multiple sludge inlet 2, multiple sludge inlet 2 are circular layout on tower body 1, to improve production efficiency.Above-mentioned driving
Mechanism 3 can use motor 3, and this motor 3 is connected with above-mentioned rotary screw 4, to drive this rotary screw 4 to rotate.
Continue the structure of above-mentioned sludge drying tower, in the present embodiment, uses one-level indirectly drying device and the direct desiccation apparatus of one-level
The structure of concatenation, in the case of above-mentioned higher level's desiccation apparatus uses indirectly drying device, i.e. subordinate's desiccation apparatus is direct mummification
Device.This direct desiccation apparatus includes that housing 9, described housing 9 enclose and sets formation one direct heat exchanging chamber, and described housing 9 is provided with
Heating sludge inlet (illustrating, do not mark), dewatered sludge outlet (illustrating, do not mark), the second thermal medium entrance are (
Diagram, does not marks) and gas outlet 11, described heating sludge inlet connects with described sludge stream circulation passage, described dewatered sludge
Outlet connects with described sludge outlet 8, and described gas outlet 11 extend out to outside described tower body 1.At higher level's desiccation apparatus mummification
The semi-oriented mud that reason obtains is entered in above-mentioned housing 9 by sludge stream circulation passage, and is situated between with the heat imported by the second thermal medium entrance
Matter carries out contact heat-exchanging, further above-mentioned semi-oriented mud is dried process so that it is dehydration forms dewatered sludge.Through heat exchange
The mixed gas of the thermal medium of cooling and the water vapour of generation, by above-mentioned gas outlet 11 discharge, can be introduced to stench processing system and enter
Row processes.
Thermal medium outlet as a kind of preferred structure of the present embodiment, described second thermal medium entrance and described indirectly drying device
Connection, will be through the first cooling thermal medium after carrying out indirect heat exchange with mud as the thermal medium of direct drying and other treatment, for using
The tube side media outlet of the indirectly drying device of shell-and-tube heat exchanger 5, above-mentioned second thermal medium entrance and this shell-and-tube heat exchanger 5
Connection.Use said structure, the heat of thermal medium can be made full use of first, reduce energy consumption；Second same thermal medium is used to realize
The two-stage drying and other treatment of indirectly drying device and direct desiccation apparatus, caloric properties is stable, it is ensured that the heat exchange effect of two-stage drying and other treatment
Really；Three can be reduced number of devices so that indirectly drying device and direct desiccation apparatus can be coupling in same tower body 1 in perfection,
Process simplification, thus reduce occupation area of equipment and technical process energy consumption.In the present embodiment, above-mentioned thermal medium can use cigarette
Gas, above-mentioned flue gas can be the flue gas that heating furnace, cement kiln or other equipment are discharged, and is introduced to above-mentioned shell-and-tube heat exchanger through blower fan
The tube side medium inlet of 5；Wherein, the flue gas entered in indirectly drying device is middle temperature flue gas, and its temperature is at 250～350 DEG C of models
In enclosing, through with mud heat exchange after, it forms low-temperature flue gas, the temperature of low-temperature flue gas in the range of 100～150 DEG C, this low temperature cigarette
Gas i.e. thermal medium and semi-oriented mud as direct desiccation apparatus carries out contact heat-exchanging.Moisture content about 80% dewatered sludge
Entering after carrying out drying and other treatment in indirectly drying device, its moisture content is reduced to 50～60%, enters further in direct desiccation apparatus
After row drying and other treatment, its moisture content can be reduced to less than 10%.
Continue the structure of above-mentioned sludge drying tower, in above-mentioned direct desiccation apparatus, for improving the heat exchange of semi-oriented mud and thermal medium
Effect, is provided with in described housing 9 and is exported to realize mud to described dewatered sludge by the transport of described heating sludge inlet by mud
The mobile heat exchange mechanisms of mobile heat exchange, such as Fig. 1, this moves heat exchange mechanisms and preferably comprises a plurality of conveyer belt 12, a plurality of described biography
Band 12 is sent to arrange in Zigzag type structure from top to bottom in described housing 9.The a plurality of conveyer belt 12 arranged by Zigzag type, is made
Obtain semi-oriented mud in housing 9 in Zigzag type movement locus, thus improve the time of contact of semi-oriented mud and thermal medium, carry
High heat transfer effect.Above-mentioned second thermal medium entrance is preferably arranged in housing 9 bottom or bottom, so that thermal medium is with semi-oriented
Mud is countercurrent heat exchange method.By controlling the transmission speed of conveyer belt 12, the stop in housing 9 of the semi-oriented mud can be controlled
Time, i.e. control its process time in direct desiccation apparatus, thus ensure drying and other treatment effect.
Optimize the structure of above-mentioned sludge drying tower further, be provided with for making mud molding to increase in described sludge stream circulation passage
The shaped device 10 of heat exchange area.This shaped device 10 makes semi-oriented mud have and thermal medium when entering in direct desiccation apparatus
Bigger contact area, thus improve heat transfer effect, in the present embodiment, this shaped device 10 preferably comprises for by semi-oriented
Mud rolls the bar shaped chaser 10 of formation face list structure.
Continue the structure of above-mentioned sludge drying tower, and above-mentioned dewatered sludge exit connects to be had for being crushed by dewatered sludge and pelletizing
Disintegrating machine 13, and below described disintegrating machine 13, be provided with transmitting device (illustrating, do not mark) be connected to described sludge outlet 8.
Above-mentioned transmitting device can use feed belt, and this feed belt is through sludge outlet 8 and extends in a dewatered sludge groove 14, dry
Changing mud to be delivered in dewatered sludge groove 14 by this feed belt, the dewatered sludge of gained can burn as fuel, it is possible to directly fills out
Bury or compost.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all new in this practicality
Within the spirit of type and principle, any modification, equivalent substitution and improvement etc. made, should be included in protection of the present utility model
Within the scope of.
Claims (10)
1. a sludge drying tower, it is characterised in that: include that tower body, described tower body are provided with sludge inlet and sludge outlet, described tower
The internal two-stage desiccation apparatus that has been sequentially arranged from top to bottom, higher level's desiccation apparatus is connected with described sludge inlet, subordinate's desiccation apparatus
Being connected with described sludge outlet, two-stage desiccation apparatus is connected by sludge stream circulation passage.
Sludge drying tower the most according to claim 1, it is characterised in that: described higher level's desiccation apparatus is indirectly drying device.
Sludge drying tower the most according to claim 2, it is characterised in that: described indirectly drying device includes shell-and-tube heat exchanger,
Described shell-and-tube heat exchanger has shell side medium inlet, shell side media outlet, tube side medium inlet and a steam outlet, wherein,
Described shell side medium inlet connects with described sludge inlet, and described shell side media outlet connects with described sludge stream circulation passage, described
Tube side medium inlet connects with the first thermal medium entrance being located on described tower body, and described steam outlet extend out to outside described tower body.
Sludge drying tower the most according to claim 3, it is characterised in that: described indirectly drying device also includes for scraping described
The scraper mechanism of the mud on the heat exchanger tube of shell-and-tube heat exchanger and drive the drive mechanism that described scraper mechanism works.
5. according to the sludge drying tower according to any one of claim 2 to 4, it is characterised in that: described subordinate desiccation apparatus is direct
Desiccation apparatus.
Sludge drying tower the most according to claim 5, it is characterised in that: described direct desiccation apparatus includes housing, described housing
Enclose set formation one direct heat exchanging chamber, described housing be provided with heating sludge inlet, dewatered sludge export, the second thermal medium entrance and
Gas outlet, described heating sludge inlet connects with described sludge stream circulation passage, the outlet of described dewatered sludge and described sludge outlet
Connection, described gas outlet extend out to outside described tower body.
Sludge drying tower the most according to claim 6, it is characterised in that: it is provided with mud in described housing by described heating mud
Entrance transport moves the mobile heat exchange mechanisms of heat exchange to the outlet of described dewatered sludge realizing mud.
Sludge drying tower the most according to claim 7, it is characterised in that: described mobile heat exchange mechanisms includes a plurality of conveyer belt, many
Conveyer belt described in bar is arranged in Zigzag type structure in described housing from top to bottom.
Sludge drying tower the most according to claim 6, it is characterised in that: described second thermal medium entrance fills with described indirectly drying
The thermal medium outlet connection put.
Sludge drying tower the most according to claim 5, it is characterised in that: it is provided with for making dirt in described sludge stream circulation passage
Mud molding is to increase the shaped device of heat exchange area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620337976.2U CN205590537U (en) | 2016-04-20 | 2016-04-20 | Sludge drying tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620337976.2U CN205590537U (en) | 2016-04-20 | 2016-04-20 | Sludge drying tower |
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| Publication Number | Publication Date |
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| CN205590537U true CN205590537U (en) | 2016-09-21 |
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| CN201620337976.2U Active CN205590537U (en) | 2016-04-20 | 2016-04-20 | Sludge drying tower |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109942170A (en) * | 2019-01-12 | 2019-06-28 | 浙江津膜环境科技有限公司 | A kind of sludge reduction device |
| CN113045169A (en) * | 2021-04-06 | 2021-06-29 | 河南城建学院 | Modularized sludge drying system based on solar heat utilization |
-
2016
- 2016-04-20 CN CN201620337976.2U patent/CN205590537U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109942170A (en) * | 2019-01-12 | 2019-06-28 | 浙江津膜环境科技有限公司 | A kind of sludge reduction device |
| CN113045169A (en) * | 2021-04-06 | 2021-06-29 | 河南城建学院 | Modularized sludge drying system based on solar heat utilization |
| CN113045169B (en) * | 2021-04-06 | 2022-06-07 | 河南城建学院 | Modularized sludge drying system based on solar heat utilization |
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