CN108275862B - Sludge drying equipment control system and method and sludge drying equipment - Google Patents
Sludge drying equipment control system and method and sludge drying equipment Download PDFInfo
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- CN108275862B CN108275862B CN201810202125.0A CN201810202125A CN108275862B CN 108275862 B CN108275862 B CN 108275862B CN 201810202125 A CN201810202125 A CN 201810202125A CN 108275862 B CN108275862 B CN 108275862B
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- 239000010802 sludge Substances 0.000 title claims abstract description 242
- 238000001035 drying Methods 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims abstract description 58
- 238000012545 processing Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract description 5
- 238000011897 real-time detection Methods 0.000 abstract description 3
- 238000012546 transfer Methods 0.000 description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000036737 immune function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
Classifications
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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
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The embodiment of the invention provides a control system and method of sludge drying equipment and the sludge drying equipment, and relates to the technical field of sludge drying treatment. The system comprises a PLC control circuit and a humidity sensor, wherein the humidity sensor and the dryer are electrically connected with the PLC control circuit, the humidity sensor is used for feeding back the humidity value of the sludge to the PLC control circuit in real time when the dryer dries the sludge, and the PLC control circuit is used for controlling the dryer to be closed when the humidity value is smaller than or equal to a set threshold value. The utility model provides a sludge drying equipment carries out the desiccation to mud when handling, through the humidity value of real-time detection mud to judge whether the stoving processing course can end according to the humidity value, do not rely on the subjective judgement of people, accomplish the transmission and the desiccation processing course of mud automatically, guaranteed the stability of the moisture content of mud, fluctuation can not be too big, promoted the drying treatment effect of sludge drying equipment to mud.
Description
Technical Field
The invention relates to the technical field of sludge drying treatment, in particular to a control system and method of sludge drying equipment and the sludge drying equipment.
Background
With the rapid development of industry, agriculture and urban, the environmental condition of water body is rapidly worsened, river systems and lakes are the environmental and resource advantages of the development of regional economy, so far, the river systems and lakes are gradually lost, and sewage for storing dirt is not reduced, so that pollution and siltation become social public nuisance increasingly. River and lake fouling causes a series of environmental hazards: a plurality of functions such as irrigation, drainage, shipping, travel and the like are faded; the water quality is repeatedly subjected to reductive pollution, and according to the aquatic biology and environmental medicine investigation on partial water body, the water area ecological system is seriously destroyed, and the biodiversity index tends to zero; the health of the coastal residents has also been affected and the immune function tends to be lowered. In recent years, a large amount of funds are invested in dredging river and lake sediment by government, and the dredging effect is not ideal due to lack of dredging technology and equipment close to national conditions.
The sludge drying equipment is special for energy-saving and environment-friendly sludge drying treatment equipment, the automation degree of the existing sludge drying equipment is low, and most of the equipment needs manual assistance in the sludge drying treatment process, so that the water content fluctuation of the dried sludge is large, the sludge drying equipment is not stable enough, and the sludge treatment is not thorough.
Disclosure of Invention
The invention aims to provide a sludge drying equipment control system and method and sludge drying equipment so as to realize remote control of the sludge drying equipment.
In order to achieve the above object, the technical scheme adopted by the embodiment of the invention is as follows:
in a first aspect, an embodiment of the present invention provides a control system for a sludge drying apparatus, which is applied to a sludge drying apparatus, wherein the sludge drying apparatus includes a dryer, and the system includes: the PLC control circuit and the humidity sensor are electrically connected with the PLC control circuit; the humidity sensor is used for feeding back the humidity value of the sludge to the PLC control circuit in real time when the dryer dries the sludge; and the PLC control circuit is used for controlling the dryer to be closed when the humidity value is smaller than or equal to a set threshold value.
In a second aspect, an embodiment of the present invention further provides a method for controlling a sludge drying apparatus, which is applied to the sludge drying apparatus, where the sludge drying apparatus includes a dryer, a PLC control circuit, a humidity sensor, a pressure sensor, a sludge feeding pump, a transmission pump, and a transmission belt, the humidity sensor, the dryer, the pressure sensor, the sludge feeding pump, and the transmission pump are all electrically connected to the PLC control circuit, and the pressure sensor and the humidity sensor are both disposed on the transmission belt, and the method includes: the PLC control circuit receives a pressure value fed back by the pressure sensor in real time in the process that the sludge feeding pump transmits sludge to the transmission belt; when the pressure value is larger than or equal to a preset value, the PLC control circuit controls the sludge inlet pump to stop transmitting sludge, controls the dryer to dry the sludge on the transmission belt, and controls the humidity sensor to feed back the humidity value of the sludge on the transmission belt to the PLC control circuit in real time; and when the humidity value is smaller than or equal to a set threshold value, the PLC control circuit controls the dryer to be closed and controls the transmission pump to be started, so that the transmission pump drives the transmission belt to transmit the dried sludge to a dry storage bin, and after the transmission belt transmits the dried sludge to the dry storage bin, the sludge inlet pump is controlled to be started, so that the sludge inlet pump continuously transmits the non-dried sludge to the transmission belt.
In a third aspect, an embodiment of the present invention further provides a sludge drying apparatus, where the sludge drying apparatus includes a dryer and a sludge drying apparatus control system, and the system includes: the PLC control circuit and the humidity sensor are electrically connected with the PLC control circuit; the humidity sensor is used for feeding back the humidity value of the sludge to the PLC control circuit in real time when the dryer dries the sludge; and the PLC control circuit is used for controlling the dryer to be closed when the humidity value is smaller than or equal to a set threshold value.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
the control system of the sludge drying equipment provided by the embodiment of the invention comprises a PLC control circuit and a humidity sensor, wherein the humidity sensor and a dryer are electrically connected with the PLC control circuit, the humidity sensor is used for feeding back the humidity value of sludge to the PLC control circuit in real time when the dryer dries the sludge, and the PLC control circuit is used for controlling the dryer to be closed when the humidity value is smaller than or equal to a set threshold value. In this application, when carrying out the desiccation to mud, through the humidity value of real-time detection mud to judge whether the stoving treatment process can end according to the humidity value, do not rely on the subjective judgement of people, accomplish the transmission and the desiccation treatment process of mud automatically, guaranteed the stability of the moisture content (humidity value promptly) of mud, fluctuation can not be too big, promoted the stoving treatment effect of sludge drying equipment to mud.
Additional features and advantages of embodiments of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of embodiments of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a circuit block diagram of a sludge drying apparatus provided by an embodiment of the present invention.
Fig. 2 shows a block circuit diagram of a sludge drying apparatus according to another embodiment of the present invention.
Fig. 3 shows a circuit block diagram of a sludge drying apparatus control system provided by an embodiment of the invention.
Fig. 4 shows a flow chart of a control method of sludge drying equipment according to an embodiment of the invention.
Icon: 100-sludge drying equipment; 110-a dryer; 120-a sludge drying equipment control system; 130-a mud pump; 140-a transfer pump; 150-a conveyor belt; 121-a PLC control circuit; 122-humidity sensor; 123-pressure sensor; 124-a signal processing unit; 1241-an analog junction box; 1242-analog to digital conversion module.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, a circuit block diagram of a sludge drying apparatus 100 according to an embodiment of the present invention is shown. The sludge drying device 100 comprises a dryer 110 and a sludge drying device control system 120, the sludge drying device control system 120 comprises a PLC control circuit 121 and a humidity sensor 122, and the humidity sensor 122 and the dryer 110 are electrically connected with the PLC control circuit 121.
The humidity sensor 122 is configured to feed back a humidity value of the sludge to the PLC control circuit 121 in real time when the dryer 110 performs a drying process on the sludge.
In this embodiment, since the humidity sensor 122 is added to the sludge drying apparatus 100, the humidity sensor 122 is configured to detect the humidity value of the sludge in real time and feed back the humidity value to the PLC control circuit 121 during the drying process of the sludge by the dryer 110.
The PLC control circuit 121 is configured to control the dryer 110 to be turned off when the humidity value is less than or equal to a set threshold value.
In this embodiment, the PLC control circuit 121 may determine whether the drying process of the sludge can be finished according to the humidity value fed back by the humidity sensor 122, and when the humidity value is less than or equal to the set threshold value, determine that the drying process of the sludge can be finished, that is, control the dryer 110 to be turned off, so that the dryer 110 stops the drying process of the sludge. In this embodiment, the humidity value may be understood as the water content of the sludge, for example, the set threshold may be any value of 10% -15%, which may be specifically determined according to actual needs.
Further, the PLC control circuit 121 is further configured to control the dryer 110 to continue drying the sludge when the humidity value is greater than the set threshold value.
In this embodiment, when the humidity value is greater than the set threshold, it indicates that the drying process of the sludge by the dryer 110 is not complete, and the PLC control circuit 121 needs to control the dryer 110 to continue the drying process of the sludge until the humidity value of the sludge is less than or equal to the set threshold, so as to end the drying process of the sludge.
Therefore, the sludge drying equipment control system 120 in the application realizes automatic drying treatment of sludge according to the humidity value of the sludge, the drying treatment of the sludge is more thorough, the generated dry sludge has less pollution to the environment, the sludge outlet water content of the sludge drying equipment 100 can be controlled in a stable range, and the problem that the fluctuation of the water content of the sludge is large is avoided.
Further, the sludge drying apparatus 100 provided in this embodiment not only can implement automatic drying treatment of sludge, but also can implement an automatic sludge conveying process. As shown in fig. 2, the sludge drying apparatus 100 further includes a sludge inlet pump 130, a transmission pump 140, and a transmission belt 150, and the sludge drying apparatus control system 120 further includes a pressure sensor 123, where the pressure sensor 123, the sludge inlet pump 130, and the transmission pump 140 are all electrically connected to the PLC control circuit 121, and the pressure sensor 123 and the humidity sensor 122 are preferably disposed on the transmission belt 150, and the transmission pump 140 is connected to the transmission belt 150, and is used for driving the transmission belt 150 to convey sludge.
The pressure sensor 123 is configured to feed back a pressure value to the PLC control circuit 121 in real time during the sludge is transferred to the transfer belt 150 by the sludge feeding pump 130.
In this embodiment, before the drying treatment of the sludge, the sludge is put into the sludge inlet hopper of the sludge drying apparatus 100, and after the sludge drying apparatus 100 is turned on, the sludge inlet pump 130 transfers the sludge in the sludge inlet hopper onto the conveyor belt 150, and the conveyor belt 150 is driven to move by the conveyor pump 140, which is the process of feeding the sludge by the sludge drying apparatus 100. During the mud feeding process, the pressure sensor 123 on the conveyor belt 150 detects the pressure value on the conveyor belt 150 in real time, and feeds back the pressure value to the PLC control circuit 121.
The PLC control circuit 121 is configured to control the sludge inlet pump 130 to stop conveying sludge, control the dryer 110 to dry the sludge on the conveyor belt 150, and control the humidity sensor 122 to feed back the humidity value of the sludge on the conveyor belt 150 to the PLC control circuit 121 in real time when the pressure value is greater than or equal to a preset value; the PLC control circuit 121 is further configured to control the sludge pump 130 to continue to transfer sludge onto the conveyor belt 150 when the pressure value is smaller than the preset value.
In this embodiment, the PLC control circuit 121 determines whether to stop feeding sludge according to the pressure value fed back by the pressure sensor 123, and when the pressure value is smaller than the preset value, controls the sludge feeding pump 130 to continue to feed sludge onto the conveyor belt 150, and when the pressure value is greater than or equal to the preset value, closes the sludge feeding pump 130 and the conveyor pump 140 to stop feeding sludge, and simultaneously controls the dryer 110 to start to dry the sludge on the conveyor belt 150, and controls the humidity sensor 122 to start to detect and feed back the humidity value of the sludge on the conveyor belt 150 in real time. For example, in this embodiment, when the sludge feeding pump 130 is just started, the pressure value fed back by the pressure sensor 123 is maintained below 0.1Mpa, and the sludge is continuously fed, and when the conveyor belt 150 is full of sludge, the pressure will rise to a preset value (for example, any value between 0.6Mpa and 0.7 Mpa), and at this time, the sludge feeding pump 130 is turned off to stop feeding the sludge, and the dryer 110 and the humidity sensor 122 are started to enter the drying treatment process of the sludge.
Further, the control system 120 of the sludge drying apparatus provided in this embodiment may further convey the dried sludge to a drying bin after the sludge drying process is completed, that is, implement the sludge discharging process of the sludge drying apparatus 100. The PLC control circuit 121 is further configured to control the transfer pump 140 to start when the humidity value is less than or equal to a set threshold value, so that the transfer pump 140 drives the transfer belt 150 to transfer the dried sludge to a dry silo.
In this embodiment, when the humidity value is less than or equal to the set threshold, the PLC control circuit 121 determines that the drying of the sludge on the conveyor belt 150 is completed, and then controls the transfer pump 140 to start, so that the transfer pump 140 drives the conveyor belt 150 to convey the dried sludge to the drying bin.
Further, the PLC control circuit 121 is further configured to control the sludge feeding pump 130 to start after the dried sludge is transferred to the dry bin by the conveyor belt 150, so that the sludge feeding pump 130 continues to transfer the sludge that is not dried to the conveyor belt 150.
That is, after the conveying belt 150 conveys the dried sludge to the dry bin, if there is sludge in the sludge inlet hopper to be dried, the PLC control circuit 121 starts the sludge inlet pump 130 by controlling the sludge inlet pump 130, so that the sludge inlet pump 130 continuously conveys the sludge in the sludge inlet hopper to the conveying belt 150, and the automatic conveying, automatic drying and automatic sludge discharging processes of the sludge are repeated, which can be specifically referred to the content of the foregoing embodiments.
In this embodiment, since the signal collected by the humidity sensor 122 is an analog signal, it is inconvenient for the PLC control circuit 121 to process, and therefore, it is necessary to convert the analog signal collected by the humidity sensor 122 into a digital humidity value and output the digital humidity value to the PLC control circuit 121. As shown in fig. 3, the sludge drying apparatus control system 120 further includes a signal processing unit 124, where the signal processing unit 124 is electrically connected to the humidity sensor 122 and the PLC control circuit 121.
The signal processing unit 124 is configured to process the analog signal collected by the humidity sensor 122 to obtain the humidity value, and output the humidity value to the PLC control circuit 121.
Specifically, in the present embodiment, the signal processing unit 124 includes an analog junction box 1241 and an analog-to-digital conversion module 1242, and the humidity sensor 122, the analog junction box 1241, the analog-to-digital conversion module 1242 and the PLC control circuit 121 are electrically connected in sequence.
The analog junction box 1241 is configured to amplify the analog signal and output the amplified analog signal to the analog-to-digital conversion module 1242, and the analog-to-digital conversion module 1242 is configured to perform analog-to-digital conversion on the amplified analog signal to obtain the humidity value, and output the humidity value to the PLC control circuit 121.
It should be understood that, in the present application, the signals collected by the pressure sensor 123 may also be processed in the same manner as the humidity sensor 122, and the analog signals are converted into digital pressure values and then output to the PLC control circuit 121, which is not described herein again.
Fig. 4 is a schematic flow chart of a control method of a sludge drying apparatus according to an embodiment of the invention. The sludge drying apparatus control method may be applied to the sludge drying apparatus 100 provided in the above embodiment. It should be noted that, the method for controlling the sludge drying apparatus according to the embodiment of the present invention is not limited by the specific sequence shown in fig. 4 and described below, and the basic principle and the technical effects thereof are the same as those of the foregoing embodiment, and for brevity, reference may be made to the corresponding content in the foregoing embodiment for the description of the present invention. It should be understood that in other embodiments, the order of part of the steps in the control method of the sludge drying apparatus according to the present invention may be interchanged according to actual needs, or part of the steps may be omitted or deleted. The specific flow shown in fig. 4 will be described in detail.
In step S101, the PLC control circuit 121 receives the pressure value fed back by the pressure sensor 123 in real time during the process of the sludge feeding pump 130 transmitting the sludge to the conveyor belt 150.
In step S102, the PLC control circuit 121 determines whether the received pressure value is smaller than a preset value.
Wherein, when the pressure value is greater than or equal to the preset value, step S103 is executed; when the pressure value is smaller than the preset value, step S104 is performed.
In step S103, when the pressure value is greater than or equal to the preset value, the PLC control circuit 121 controls the sludge feeding pump 130 to stop conveying sludge, controls the dryer 110 to dry the sludge on the conveyor belt 150, and controls the humidity sensor 122 to feed back the humidity value of the sludge on the conveyor belt 150 to the PLC control circuit 121 in real time.
In step S104, the PLC control circuit 121 controls the sludge inlet pump 130 to continuously transmit sludge to the transmission belt 150 when the pressure value is smaller than the preset value.
In step S105, the PLC control circuit 121 determines whether the received humidity value is greater than a set threshold.
When the humidity value is less than or equal to the set threshold, step S106 is performed; when the humidity value is greater than the set threshold, step S107 is performed.
In step S106, when the humidity value is less than or equal to the set threshold, the PLC control circuit 121 controls the dryer 110 to be turned off and controls the transfer pump 140 to be started, so that the transfer pump 140 drives the transfer belt 150 to transfer the dried sludge to a dry storage bin, and controls the sludge inlet pump 130 to be started after the transfer belt 150 transfers the dried sludge to the dry storage bin, so that the sludge inlet pump 130 continues to transfer the non-dried sludge to the transfer belt 150.
In step S107, the PLC control circuit 121 controls the dryer 110 to continue the drying process of the sludge when the humidity value is greater than the set threshold value.
In summary, the sludge drying equipment control system, the method and the sludge drying equipment provided by the embodiment of the invention comprise a dryer, a sludge feeding pump, a transmission belt and a sludge drying equipment control system, wherein the sludge drying equipment control system comprises a PLC control circuit, a pressure sensor and a humidity sensor, the pressure sensor, the humidity sensor, the dryer, the sludge feeding pump and the transmission pump are all electrically connected with the PLC control circuit, the pressure sensor is used for feeding back a pressure value to the PLC control circuit in real time in the process that the sludge feeding pump transmits sludge to the transmission belt, and the PLC control circuit is used for controlling the sludge feeding pump to stop transmitting sludge and controlling the dryer to dry the sludge on the transmission belt and controlling the humidity sensor to feed back the humidity value of the sludge on the transmission belt to the PLC control circuit in real time when the pressure value is larger than or equal to a preset value; the PLC control circuit is also used for controlling the dryer to be closed and controlling the transmission pump to be started when the humidity value is smaller than or equal to a set threshold value, so that the transmission pump drives the transmission belt to transmit the dried sludge to a drying bin; and after the dried sludge is transmitted to the dry bin by the transmission belt, controlling the sludge inlet pump to start so that the sludge inlet pump continuously transmits the sludge which is not dried to the transmission belt. Therefore, the sludge drying equipment in this application carries out the desiccation to mud when handling, through the humidity value of real-time detection mud to judge whether the stoving processing procedure can end according to the humidity value, do not rely on the subjective judgement of people, accomplish the transmission and the desiccation processing procedure of mud automatically, guaranteed the stability of the moisture content (humidity value promptly) of mud, fluctuation can not be too big, promoted the drying treatment effect of sludge drying equipment to mud, it is more thorough to the desiccation of mud, and the dry mud of production is less to environmental pollution.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
Claims (7)
1. A sludge drying apparatus control system for a sludge drying apparatus, the sludge drying apparatus comprising a dryer, the system comprising: the PLC control circuit and the humidity sensor are electrically connected with the PLC control circuit; the sludge drying equipment further comprises a sludge feeding pump, a transmission pump and a transmission belt, the system further comprises a pressure sensor, the pressure sensor and the humidity sensor are arranged on the transmission belt, and the pressure sensor, the transmission pump and the sludge feeding pump are electrically connected with the PLC control circuit; the sludge drying equipment further comprises a sludge inlet hopper, wherein the sludge inlet hopper is used for storing sludge which is not dried, and the sludge inlet pump is used for conveying the sludge in the sludge inlet hopper to the conveying belt;
the humidity sensor is used for feeding back the humidity value of the sludge to the PLC control circuit in real time when the dryer dries the sludge;
the pressure sensor is used for feeding back a pressure value to the PLC control circuit in real time in the process that the mud feeding pump transmits the sludge to the transmission belt;
the PLC control circuit is used for judging whether mud feeding is to be stopped or not according to the pressure value fed back by the pressure sensor;
the PLC control circuit is also used for controlling the sludge inlet pump to stop transmitting sludge when the pressure value is greater than or equal to a preset value, controlling the dryer to dry the sludge on the transmission belt, and controlling the humidity sensor to feed back the humidity value of the sludge on the transmission belt to the PLC control circuit in real time;
the PLC control circuit is also used for controlling the dryer to be closed and controlling the transmission pump to be started when the humidity value is smaller than or equal to a set threshold value, so that the transmission pump drives the transmission belt to transmit the dried sludge to a drying bin;
and the PLC control circuit is also used for controlling the sludge feeding pump to start after the dried sludge is transmitted to the dry bin by the transmission belt, so that the sludge feeding pump continuously transmits the sludge which is not dried to the transmission belt.
2. The sludge drying appliance control system of claim 1 wherein the PLC control circuit is further configured to control the dryer to continue drying the sludge when the moisture value is greater than the set threshold value.
3. The sludge drying equipment control system of claim 1 further comprising a signal processing unit, wherein the signal processing unit is electrically connected to both the humidity sensor and the PLC control circuit;
the signal processing unit is used for processing the analog signals acquired by the humidity sensor to obtain the humidity value, and outputting the humidity value to the PLC control circuit.
4. The sludge drying equipment control system of claim 3, wherein the signal processing unit comprises an analog junction box and an analog-to-digital conversion module, and the humidity sensor, the analog junction box, the analog-to-digital conversion module and the PLC control circuit are electrically connected in sequence;
the analog junction box is used for amplifying the analog signal and outputting the amplified analog signal to the analog-to-digital conversion module;
the analog-to-digital conversion module is used for performing analog-to-digital conversion on the amplified analog signal to obtain the humidity value, and outputting the humidity value to the PLC control circuit.
5. The control method of the sludge drying equipment is applied to the sludge drying equipment and is characterized by comprising a dryer, a PLC control circuit, a humidity sensor, a pressure sensor, a sludge feeding pump, a transmission pump and a transmission belt, wherein the humidity sensor, the dryer, the pressure sensor, the sludge feeding pump and the transmission pump are all electrically connected with the PLC control circuit, the pressure sensor and the humidity sensor are all arranged on the transmission belt, the sludge drying equipment further comprises a sludge feeding hopper, the sludge feeding hopper is used for storing sludge which is not dried, and the sludge feeding pump is used for transmitting the sludge in the sludge feeding hopper to the transmission belt; the method comprises the following steps:
the PLC control circuit receives a pressure value fed back by the pressure sensor in real time in the process that the sludge feeding pump transmits sludge to the transmission belt;
the PLC control circuit judges whether to stop mud feeding according to the pressure value fed back by the pressure sensor;
when the pressure value is larger than or equal to a preset value, the PLC control circuit controls the sludge inlet pump to stop transmitting sludge, controls the dryer to dry the sludge on the transmission belt, and controls the humidity sensor to feed back the humidity value of the sludge on the transmission belt to the PLC control circuit in real time;
when the humidity value is smaller than or equal to a set threshold value, the PLC control circuit controls the dryer to be closed and controls the transmission pump to be started so that the transmission pump drives the transmission belt to transmit the dried sludge to a drying bin;
and the PLC control circuit controls the sludge feeding pump to start after the dried sludge is transmitted to the dry bin by the transmission belt, so that the sludge feeding pump continuously transmits the sludge which is not dried to the transmission belt.
6. The sludge drying apparatus control method as claimed in claim 5, further comprising:
and when the humidity value is larger than the set threshold value, the PLC control circuit controls the dryer to continuously dry the sludge.
7. A sludge drying apparatus comprising a dryer, a sludge hopper and a sludge drying apparatus control system as claimed in any one of claims 1 to 4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810202125.0A CN108275862B (en) | 2018-03-12 | 2018-03-12 | Sludge drying equipment control system and method and sludge drying equipment |
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| CN201810202125.0A CN108275862B (en) | 2018-03-12 | 2018-03-12 | Sludge drying equipment control system and method and sludge drying equipment |
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| CN108275862A CN108275862A (en) | 2018-07-13 |
| CN108275862B true CN108275862B (en) | 2024-03-19 |
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|---|---|---|---|---|
| CN109775957A (en) * | 2019-02-15 | 2019-05-21 | 广州市香港科大霍英东研究院 | A kind of sludge drying system and its implementation of combination Temperature Humidity Sensor |
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