CN104460486B - Sludge pressing equipment enters mud control system and control method automatically - Google Patents
Sludge pressing equipment enters mud control system and control method automatically Download PDFInfo
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- CN104460486B CN104460486B CN201410545329.6A CN201410545329A CN104460486B CN 104460486 B CN104460486 B CN 104460486B CN 201410545329 A CN201410545329 A CN 201410545329A CN 104460486 B CN104460486 B CN 104460486B
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- mud
- sludge
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
-
- 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
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- Engineering & Computer Science (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)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Treatment Of Sludge (AREA)
Abstract
Enter mud control system and control method automatically the invention discloses a kind of sludge pressing equipment.Control system includes sludge pressing equipment, pressure sensor, enters dredge pump and PLC and enter mud control system automatically, equipment sets up humidity sensor, and humidity sensor passes sequentially through simulation connection box, AD analog-to-digital conversion modules and private cable and enters mud control system automatically with PLC and is connected.Control method：Equipment is opened into dredge pump when starting and entering mud system automatically, while pressure sensor feedback pressure numerical value, then continues into mud when pressure is not more than setting numerical value, when pressure then stops being further continued for for a period of time into mud into mud more than setting numerical value；Humidity sensor is to system feedback sludge humidity value in this process, when humidity is continued cycling through into mud more than setting value system；Enter mud automatically up to setting value when humidity to stop.The present invention judges to enter whether mud can terminate automatically by detecting the moisture percentage in sewage sludge in press apparatus, the subjective intervention of not employment, finally makes the mud extraction moisture control of equipment in certain value.
Description
Technical field
The invention belongs to technical field of sludge treatment, it is related to a kind of sludge pressing equipment to enter mud control system and control automatically
Method.
Background technology
Existing sludge pressing equipment common problem is on the market：It is aqueous by the sludge after press apparatus treatment
Rate fluctuation is excessive, it is impossible to meet the code requirement of environmental protection industry (epi).But problem can not lay the blame in sludge pressing equipment, because squeezing
The volume compression ratio of equipment is fixed, by mud extraction moisture content computing formula (mud extraction moisture content=enter mud water content x volume compression
Than) as can be seen that the moisture content that reason is mainly into mud fluctuated great talent to cause the moisture content of mud extraction to fluctuate big.And enter containing for mud
Water rate is mainly controlled by mud system is entered automatically, so changing control of the control mode for mud extraction moisture content for entering mud system automatically
Just seem especially important.
The mud system of entering of sludge pressing equipment on the market typically uses Stress control (as shown in Figure 2) now.Pressure control
System is to control opening/stopping into dredge pump, then experience one dwell time of setting for passing through staff by pipe pressure sensor
To terminate this circulation, this control is also most basic control, because press apparatus are to use spring structure, if entering mud
When do not consider Stress control, it may appear that spring stress is excessive and overflow mud mixture, so automatically enter mud system can not lack
Few Stress control.But the shortcoming of this control is the size for needing the subjective intervention of people, dwell time setting cannot react real
The situation of border mud extraction moisture content.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided a kind of sludge pressing equipment enters mud control system automatically
System and control method.It is contemplated that solving sludge pressing equipment moisture percentage in sewage sludge fluctuation problems of too from mud system is entered, make
The moisture content of mud extraction is maintained at a predetermined scope.
Technical scheme is as follows：
A kind of sludge pressing equipment enters mud control system automatically, and it includes sludge pressing equipment, pressure sensor, enters mud
Pump, and PLC enters mud control system automatically, and the mud chamber entrance side that enters of sludge pressing equipment is additionally arranged humidity sensor, and PLC is automatic
Enter mud control system and include the control loop for controlling into dredge pump by pressure sensor, also comprising by humidity sensor control into
The control loop of dredge pump, i.e. PLC enter automatically mud control system comprising by pressure sensor and humidity sensor and meanwhile control into
The control loop of dredge pump；Humidity sensor pass sequentially through simulation connection box, AD analog-to-digital conversion modules and RS-485 private cables with
PLC enters the connection of mud control system automatically.
It is as follows that a kind of sludge pressing equipment enters mud control method automatically：Sludge pressing equipment enters mud control automatically in startup PLC
Opened into dredge pump during system processed, while pressure sensor feedback pressure numerical value, when pressure value be not more than setting numerical value then continue into
Mud, when pressure value then stops being further continued for for a period of time into mud into mud more than setting numerical value；In this process humidity sensor to
System feedback sludge humidity value is that, into mud moisture content, when humidity value is more than setting numerical value, system is continued cycling through into mud；Work as humidity
When value reaches setting numerical value, mud stopping is entered automatically；Thus, by entering mud chamber entrance side setting humidity sensor, by certainly
Move and controlled into during mud into controlling sludge to enter mud moisture content while mud pressure again, obtain final sludge mud extraction moisture content
Automatic effectively control, it is ensured that mud extraction moisture content is in a stationary value.
The specific control process that above-mentioned sludge pressing equipment enters mud control system automatically is as follows：Sludge pressing equipment is starting
PLC is opened into dredge pump when entering mud control system automatically, while pressure sensor feedback pressure numerical value, pressure now can be maintained
Below 0.1MPa, continues into mud, and when sludge pressing equipment cavity is full of sludge, pressure can rapidly rise to set pressure
0.6MPa~0.7MPa, now stops into dredge pump 1~2 minute and detects that the sludge humidity value in sludge pressing equipment cavity enters
Mud moisture content；When the sludge humidity value in cavity is more than setting numerical value 70%~75%, system is continued cycling through into mud；Work as humidity
When value reaches setting numerical value 70%~75%, the stopping of mud control system is entered automatically.
Beneficial effects of the present invention：
The present invention it is original enter mud system automatically in a humidity is increased by the mud chamber entrance side of entering in press apparatus
Sensor, makes the mud system of entering automatically of common use Stress control become the voluntarily inspection controlled simultaneously using pressure+humidity
Survey sludge enter mud moisture content automatically enter mud system.
Sludge pressing equipment of the invention enters mud control system and the advantage of control method automatically：In the control that is stressed
The moisture percentage in sewage sludge in press apparatus can voluntarily be detected again simultaneously, judged by detecting the moisture percentage in sewage sludge in press apparatus certainly
Move into whether mud process can terminate, the subjective intervention of not employment can guarantee that mud extraction moisture content in a stationary value again simultaneously, most
Make the mud extraction moisture control of equipment eventually in a stationary value.
Brief description of the drawings
Fig. 1 is the structural representation that sludge pressing equipment in the present invention enters mud control system automatically；
Fig. 2 is the logic diagram that sludge pressing equipment of the prior art enters mud control method automatically；
Fig. 3 is the logic diagram that sludge pressing equipment in the present invention enters mud control method automatically；
Fig. 4 is the connection diagram that humidity sensor enters mud control system with PLC automatically in the present invention.
In figure：1st, sludge pressing equipment 2, enter dredge pump 3, PLC and enter mud control system 4, pressure sensor 5, wet automatically
Degree sensor
The present invention is further illustrated below in conjunction with drawings and Examples for specific embodiment.
Embodiment 1
As shown in figure 1, a kind of sludge pressing equipment of the invention enters mud control system automatically, it include sludge pressing equipment 1,
Pressure sensor 4, enter dredge pump 2, and PLC enters mud control system 3 automatically, the mud chamber entrance side that enters of sludge pressing equipment is additionally arranged
Humidity sensor 5, PLC is entered mud control system and includes the control loop controlled by pressure sensor into dredge pump automatically, is also included
By humidity sensor control the control loop into dredge pump, i.e. PLC enter mud control system automatically comprising by pressure sensor and
Humidity sensor controls the control loop into dredge pump simultaneously；Humidity sensor passes sequentially through simulation connection box, AD analog-to-digital conversion moulds
Block and RS-485 private cables enter mud control system with PLC and are connected (as shown in Figure 4) automatically.I.e. humidity sensor passes through AD moduluses
Modular converter and private cable pass the signal to PLC and enter mud control system automatically, so as to realize the control to entering mud moisture content.
Embodiment 2
As shown in Figure 1, Figure 3, to enter mud control method automatically as follows for a kind of sludge pressing equipment of the invention：Sludge pressing equipment
Opened into dredge pump starting when PLC enters mud control system automatically, while pressure sensor feedback pressure numerical value, pressure meeting now
Below 0.1MPa is maintained, is continued into mud, when sludge pressing equipment cavity is full of sludge, pressure can rapidly rise to setting pressure
Power 0.6MPa, at this time needs to stop into dredge pump 1~2 minute and detect the sludge humidity value in sludge pressing equipment cavity (i.e.
Enter mud moisture content)；When the sludge humidity value in cavity is more than setting numerical value 75%, system is continued cycling through into mud；Work as humidity value
When reaching 75%, the stopping of mud control system is entered automatically.Thus, humidity sensor is set by entering mud chamber entrance side, by
Automatically enter mud during control into while mud pressure again control sludge enter mud moisture content, obtain final sludge mud extraction moisture content
To automatic effectively control, it is ensured that mud extraction moisture content is in a stationary value.
Embodiment 3
As shown in Figure 1, Figure 3, to enter mud control method automatically as follows for a kind of sludge pressing equipment of the invention：Sludge pressing equipment
Opened into dredge pump starting when PLC enters mud control system automatically, while pressure sensor feedback pressure numerical value, pressure meeting now
Below 0.1MPa is maintained, is continued into mud, when sludge pressing equipment cavity is full of sludge, pressure can rapidly rise to setting pressure
Power 0.7MPa, at this time needs to stop into dredge pump 1~2 minute and detect the sludge humidity value in sludge pressing equipment cavity (i.e.
Enter mud moisture content)；When the sludge humidity value in cavity is more than setting numerical value 70%, system is continued cycling through into mud；Work as humidity value
When reaching 70%, the stopping of mud control system is entered automatically.Thus, humidity sensor is set by entering mud chamber entrance side, by
Automatically enter mud during control into while mud pressure again control sludge enter mud moisture content, obtain final sludge mud extraction moisture content
To automatic effectively control, it is ensured that mud extraction moisture content is in a stationary value.
Claims (5)
1. a kind of sludge pressing equipment enters mud control system automatically, and it includes sludge pressing equipment, pressure sensor, enters dredge pump,
And PLC enters mud control system automatically, it is characterised in that the mud chamber entrance side that enters of sludge pressing equipment is additionally arranged humidity sensor
Device；PLC enters mud control system and includes the control loop for controlling into dredge pump by pressure sensor automatically, also comprising being passed by humidity
Sensor controls the control loop into dredge pump, i.e. PLC to enter mud control system automatically comprising by pressure sensor and humidity sensor
The control loop into dredge pump is controlled simultaneously；Humidity sensor passes sequentially through simulation connection box, AD analog-to-digital conversion modules and RS-485
Private cable enters mud control system with PLC and is connected automatically；
The sludge pressing equipment enter automatically mud control system automatically enter mud control method it is as follows：Sludge pressing equipment is starting
PLC is opened into dredge pump when entering mud control system automatically, while pressure sensor feedback pressure numerical value, when pressure value is not more than setting
Numerical value then continues into mud, when pressure value then stops being further continued for for a period of time into mud into mud more than setting numerical value；In this process
Humidity sensor is that, into mud moisture content, when humidity value is more than setting numerical value, system continues to follow to system feedback sludge humidity value
Ring enters mud；When humidity value reaches setting numerical value, mud stopping is entered automatically；Thus, by entering mud chamber entrance side setting humidity biography
Sensor, controls sludge to enter mud moisture content again by while entering automatically and being controlled into mud pressure during mud, makes final sludge
Mud extraction moisture content obtains automatic effectively control, it is ensured that mud extraction moisture content is in a stationary value.
2. a kind of sludge pressing equipment as claimed in claim 1 enter automatically mud control system automatically enter mud control method, its
It is characterised by, sludge pressing equipment is opened into dredge pump when startup PLC enters mud control system automatically, while pressure sensor feeds back
Pressure value, then continues into mud when pressure value is not more than setting numerical value, when pressure value then stops into one section of mud more than setting numerical value
Time is further continued for into mud；Humidity sensor is, into mud moisture content, to work as humidity to system feedback sludge humidity value in this process
When value is more than setting numerical value, system is continued cycling through into mud；When humidity value reaches setting numerical value, mud stopping is entered automatically；Thus, lead to
Cross and entering mud chamber entrance side setting humidity sensor, dirt is controlled again by while entering and being controlled into mud pressure during mud automatically
Mud enters mud moisture content, final sludge mud extraction moisture content is obtained automatic effectively control, it is ensured that mud extraction moisture content is in a stabilization
Value.
3. sludge pressing equipment as claimed in claim 2 enter automatically mud control system automatically enter mud control method, its feature
It is that sludge pressing equipment is opened into dredge pump when startup PLC enters mud control system automatically, while pressure sensor feedback pressure
Numerical value, pressure now can maintain below 0.1MPa, continue into mud, when sludge pressing equipment cavity is full of sludge, pressure
Setting pressure 0.6MPa~0.7MPa can be rapidly risen to, is now stopped into dredge pump 1~2 minute and is detected sludge pressing equipment cavity
Internal sludge humidity value is into mud moisture content；When the sludge humidity value in cavity is more than setting numerical value 70%~75%, it is
System is continued cycling through into mud；When humidity value reaches setting numerical value 70%~75%, the stopping of mud control system is entered automatically.
4. sludge pressing equipment as claimed in claim 3 enter automatically mud control system automatically enter mud control method, its feature
It is that sludge pressing equipment is opened into dredge pump when startup PLC enters mud control system automatically, while pressure sensor feedback pressure
Numerical value, pressure now can maintain below 0.1MPa, continue into mud, when sludge pressing equipment cavity is full of sludge, pressure
Can rapidly rise to set pressure 0.6MPa, now stop into dredge pump 1~2 minute and detect the dirt in sludge pressing equipment cavity
Mud humidity value is into mud moisture content；When the sludge humidity value in cavity is more than setting numerical value 75%, system is continued cycling through into mud；
When humidity value reaches 75%, the stopping of mud control system is entered automatically.
5. sludge pressing equipment as claimed in claim 3 enter automatically mud control system automatically enter mud control method, its feature
It is that sludge pressing equipment is opened into dredge pump when startup PLC enters mud control system automatically, while pressure sensor feedback pressure
Numerical value, pressure now can maintain below 0.1MPa, continue into mud, when sludge pressing equipment cavity is full of sludge, pressure
Can rapidly rise to set pressure 0.7MPa, now stop into dredge pump 1~2 minute and detect the dirt in sludge pressing equipment cavity
Mud humidity value is into mud moisture content；When the sludge humidity value in cavity is more than setting numerical value 70%, system is continued cycling through into mud；
When humidity value reaches 70%, the stopping of mud control system is entered automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410545329.6A CN104460486B (en) | 2014-10-15 | 2014-10-15 | Sludge pressing equipment enters mud control system and control method automatically |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410545329.6A CN104460486B (en) | 2014-10-15 | 2014-10-15 | Sludge pressing equipment enters mud control system and control method automatically |
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| Publication Number | Publication Date |
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| CN104460486A CN104460486A (en) | 2015-03-25 |
| CN104460486B true CN104460486B (en) | 2017-07-07 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108275862B (en) * | 2018-03-12 | 2024-03-19 | 广州晟启能源设备有限公司 | Sludge drying equipment control system and method and sludge drying equipment |
| CN113024072A (en) * | 2021-02-05 | 2021-06-25 | 集美大学 | Automatic sludge dewatering and squeezing equipment and method |
Citations (6)
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|---|---|---|---|---|
| EP0491247A1 (en) * | 1990-12-18 | 1992-06-24 | Thyssen Still Otto Anlagentechnik GmbH | Process for explosion-proof drying of sewage sludge |
| CN201634559U (en) * | 2010-03-18 | 2010-11-17 | 王志恒 | Sludge remote control drying device |
| CN102173556A (en) * | 2011-01-20 | 2011-09-07 | 北京城市排水集团有限责任公司 | Device and method for cell wall breaking in municipal sludge dewatering process |
| CN102936089A (en) * | 2012-11-28 | 2013-02-20 | 广州中国科学院沈阳自动化研究所分所 | Automatic control system of sludge deep dewatering overall process and treatment method |
| CN203487018U (en) * | 2013-07-30 | 2014-03-19 | 广东省环境科学研究院 | Deep treatment device for sludge |
| CN104049074A (en) * | 2014-07-02 | 2014-09-17 | 江苏大学 | Method and device for estimating sludge moisture content in sludge drying process |
-
2014
- 2014-10-15 CN CN201410545329.6A patent/CN104460486B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0491247A1 (en) * | 1990-12-18 | 1992-06-24 | Thyssen Still Otto Anlagentechnik GmbH | Process for explosion-proof drying of sewage sludge |
| CN201634559U (en) * | 2010-03-18 | 2010-11-17 | 王志恒 | Sludge remote control drying device |
| CN102173556A (en) * | 2011-01-20 | 2011-09-07 | 北京城市排水集团有限责任公司 | Device and method for cell wall breaking in municipal sludge dewatering process |
| CN102936089A (en) * | 2012-11-28 | 2013-02-20 | 广州中国科学院沈阳自动化研究所分所 | Automatic control system of sludge deep dewatering overall process and treatment method |
| CN203487018U (en) * | 2013-07-30 | 2014-03-19 | 广东省环境科学研究院 | Deep treatment device for sludge |
| CN104049074A (en) * | 2014-07-02 | 2014-09-17 | 江苏大学 | Method and device for estimating sludge moisture content in sludge drying process |
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