CN113741332A - Control mode of vertical sewage treatment equipment - Google Patents
Control mode of vertical sewage treatment equipment Download PDFInfo
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- CN113741332A CN113741332A CN202111055832.XA CN202111055832A CN113741332A CN 113741332 A CN113741332 A CN 113741332A CN 202111055832 A CN202111055832 A CN 202111055832A CN 113741332 A CN113741332 A CN 113741332A
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- 239000010865 sewage Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 125000004122 cyclic group Chemical group 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 238000005273 aeration Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000014759 maintenance of location Effects 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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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
- G05B19/054—Input/output
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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
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1103—Special, intelligent I-O processor, also plc can only access via processor
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention discloses a control mode of vertical sewage treatment equipment, which is provided with a time sequence circulation control mode built by a time relay combination according to an operation circulation process of JBR equipment besides field control, local control and remote control finished by a PLC (programmable logic controller) for a user to select, and is used for a small-sized sewage treatment user to select and save resources. The time sequence cyclic control mode realized by the time relay is flexible and convenient, has lower price, can be maintained by field engineers, and is suitable for small-sized sewage treatment units.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a control mode of vertical sewage treatment equipment.
Background
The sewage treatment control technology in China mainly has the following three modes: and three control modes of field control, local control and remote control are adopted.
The field control is that a manual control button is arranged near the electric equipment; the local control is divided into local manual control and local automatic control. The local manual control is implemented through a local operation interface of the PLC station, and the local automatic control automatically controls the operation of equipment according to process parameters and a preset program through the PLC station without manual intervention; the remote control includes remote manual control and remote automatic control. The remote manual control is to control all the processes and electrical equipment of the sewage treatment plant by a keyboard and a mouse of a main control machine (an upper computer). The control mode makes the main control machine become the centralized operation platform of all the electric and technological equipment of the sewage plant. When the remote automatic control is finished, the main control machine, the field operation display terminal (each PLC station) and the field sub-station coordinate to automatically judge whether the on/off conditions of various devices are met or whether the operation values are optimal according to the detection values of various process parameters and the operation state of the devices, and control the devices according to the results.
Disclosure of Invention
In view of the above, the invention provides a control mode of a vertical sewage treatment device, which realizes the local control of JBR (JBR) equipment by utilizing the time matching arrangement of a submersible pump and a stirrer.
In order to achieve the purpose, the invention provides the following technical scheme:
a control mode of vertical sewage treatment equipment comprises the following steps:
s1, starting the submersible pump and the stirrer simultaneously for the duration A, and then entering the step S2; the submersible pump is connected with the ejector and arranged in a biological reaction area of the vertical sewage treatment equipment; the stirrer is arranged in a water inlet pipe of the biological reaction zone and is lower than the submersible pump in height;
s2, turning off the stirrer for the duration of B, and then entering the step S3;
s3, turning off the submersible pump and the stirrer at the same time for a period of C, and then entering the step S1.
Preferably, the time period a: B: C ═ 3:2: 1.
Preferably, the time period A is 4.5 hours, the time period B is 3 hours, and the time period C is 1.5 hours.
Preferably, a timing cycle control circuit is provided, the timing cycle control circuit including: the system comprises a first time relay, a second time relay, a third time relay, a first intermediate relay of the stirrer and a second intermediate relay shared by the submersible pump and the stirrer;
the contact of the first time relay is connected in series with the first intermediate relay, the contact of the second time relay is connected in series with the second intermediate relay, and the contact of the third time relay is connected in series with the first time relay.
Preferably, a timing cycle control circuit is provided, the timing cycle control circuit including: the first path, the second path, the third path and the fourth path are connected in parallel between the KC end and the N end;
the first path comprises: the normally closed delay contact of the third time relay and the first time relay are connected in series;
the second path includes: a first normally closed time delay contact of the first time relay and a first intermediate relay of the mixer; the KC end of a first normally closed delay contact of the first time relay is connected with the KC end of the time sequence circulation control circuit;
the third path includes: the second normally closed time delay contact and the second time relay of the first time relay are connected in series;
the fourth path includes: a normally open time delay contact of the first time relay and a third time relay which are connected in series;
the timing cycle control circuit further comprises: a fifth path; the fifth path includes: a normally closed delay contact of a second time relay connected in series and a second intermediate relay shared by the submersible pump and the stirrer; one end of the fifth path is connected between the first normally closed time delay contact of the first time relay of the second path and the first intermediate relay, and the other end of the fifth path is connected to the N end of the time sequence circulation control circuit.
Preferably, the set time of the first time relay is a + B, the set time of the second time relay is a, and the set time of the third time relay is C.
Preferably, in the step S1, a submersible pump is turned on and a blender is turned off for a period of time a, and then a normally closed electric shock of the second time relay in the fifth path is opened, so that the second intermediate relay is short-circuited, thereby turning off the submersible pump and turning on the blender;
in the step S2, after the submersible pump is turned off and the agitator is turned on for a time period B, the first normally closed time delay contact of the first time relay in the second path is opened, so that the first intermediate relay is short-circuited, and the agitator is turned off; a second normally closed time delay contact of the first time relay in the fourth path is disconnected, so that the second time relay is short-circuited; a normally open time delay contact of the first time relay in the fifth path is closed, so that the third time relay is electrified;
in the step S3, the submersible pump and the agitator are turned off at the same time for a period of time C, and then the normally closed delay contact of the third time relay in the first path is opened, so that the first time relay is short-circuited.
Before step S1, the method further includes the steps of:
s0: acquiring a command for controlling mode selection, and selecting a control mode according to the command: the control method comprises the following steps of field control, PLC local control, PLC remote control or sequential cycle control.
According to the technical scheme, the control mode of the vertical sewage treatment equipment provided by the invention is provided with a time sequence circulation control mode which is built by combining the time relays according to the operation circulation process of the JBR equipment and is selected by a user besides field control, local control and remote control which are completed by a PLC, so that the small sewage treatment user can select the control mode, and resources are saved. The time sequence cyclic control mode realized by the time relay is flexible and convenient, has lower price, can be maintained by field engineers, and is suitable for small-sized sewage treatment units.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1a is a schematic diagram of a control scheme for a submersible pump according to an embodiment of the present invention;
FIG. 1b is a terminal wiring diagram of FIG. 1 a;
FIG. 1c is an electrical diagram of a submersible pump provided in accordance with an embodiment of the present invention;
fig. 1 a-1 c are control schematic diagrams of a submersible pump (QP), and the control principle of a stirrer (JP) is the same, and only corresponding codes are needed to be modified;
KB is a leakage protector, ST1 and SP1 are buttons, SA1 is a change-over switch, HR, HG and HY are signal lamps, FU1 is a fuse, KP1 and KA are intermediate relays, KH1 is a thermal relay, KM1 is a contactor, and QF1 is a breaker;
FIG. 2 is a schematic diagram of timing control according to an embodiment of the present invention;
KT 1-3 is a time relay, ST and SP are buttons, SA is a change-over switch, FU is a fuse, and KA1, KA2 and KC are intermediate relays;
FIG. 3 is a schematic structural diagram of a vertical sewage treatment apparatus according to an embodiment of the present invention;
wherein, 1 is a water inlet pipe, 2 is a water pump pressure pipe, 3 is an air inlet pipe, 4 is a dosing pipe, 5 is a sedimentation region water outlet pipe, 7 is a dephosphorization region water outlet pipe, 8 is a perforated sludge discharge pipe, 9 is a first 90-degree elbow, 10 is a second 90-degree elbow, 11 is a flange, 12 is a pipe plug, 13 is a first tee, 14 is a second tee, 15 is a tee and 16 is a ball valve;
firstly, an ejector is adopted; ② a submersible pump; the third step is a stirrer, the fourth step is a first overflow water collecting tank, the fifth step is a biological rope, the sixth step is a submersible pump bracket, and the seventh step is a second overflow water collecting tank;
i is a biological reaction zone; II is a flow guide area; III is a precipitation zone; IV is a mixing zone; v is a flocculation zone; VI is a phosphorus removal area.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The control mode of the vertical sewage treatment equipment provided by the embodiment of the invention comprises the following steps:
s1, starting the submersible pump II and the stirrer III at the same time for the duration A, and then entering the step S2; the submersible pump is connected with the jet device and arranged in a biological reaction area I of the vertical sewage treatment equipment; the stirrer is arranged in the biological reaction zone I and is lower than the submersible pump;
s2, turning off the stirrer C until the time length B is reached, and then entering the step S3;
s3, turning off the submersible pump and the stirrer for the duration C, and then entering the step S1.
According to the technical scheme, the control mode of the vertical sewage treatment equipment provided by the embodiment of the invention utilizes the time matching arrangement of the submersible pump and the stirrer, and the operation circulation step is as follows: aeration, stirring and standing to realize the local control of the JBR equipment. The combination of the submersible pump and the stirrer is adopted in the scheme, and the system is particularly suitable for water depth scenes of vertical sewage treatment equipment.
Preferably, the running time of the time length A, B and C is 3:2:1, and the running time is 3:2:1 as compared with the conventional running time, and of course, the skilled person can also adjust the running time according to the actual water quality standard requirements of inlet and outlet water. If the hydraulic retention time of the reaction zone is 9 hours, the aeration time, the stirring time and the retention time are respectively 4.5 hours, 3 hours and 1.5 hours.
The control mode of the vertical sewage treatment equipment provided by the embodiment of the invention is provided with a time sequence circulation control circuit, and the time sequence circulation control circuit comprises: the first time relay KT1, the second time relay KT2, the third time relay KT2, the first intermediate relay KA1 of the stirrer III, the submersible pump II and the second intermediate relay KA2 which is common to the stirrer III; a schematic diagram of which can be seen with reference to fig. 3;
the contact of the first time relay KT1 is connected in series with the first intermediate relay KA1, the contact of the second time relay KT2 is connected in series with the second intermediate relay KA2, and the contact of the third time relay KT2 is connected in series with the first time relay KT 1. The PLC realizes automatic control, has higher price and needs to be maintained by the cooperation of a PLC supplier; the scheme adopts the time sequence cycle control realized by the time relay, is flexible and convenient, has lower price and can be maintained by a field engineer.
Further, the timing cycle control circuit includes: the first path, the second path, the third path and the fourth path are connected in parallel between the KC end and the N end;
the first path comprises: a normally closed time delay contact of a third time relay KT3 and a first time relay KT1 which are connected in series;
the second path includes: a first normally closed time delay contact of a first time relay KT1 and a first intermediate relay KA1 of a stirrer III; a KC end of a first normally closed delay contact of the first time relay KT1 is connected with a KC end of the time sequence circulation control circuit;
the third path includes: a second normally closed time delay contact of the first time relay KT1 and a second time relay KT2 which are connected in series;
the fourth way includes: a normally open time delay contact of a first time relay KT1 and a third time relay KT3 which are connected in series;
the timing cycle control circuit further comprises: a fifth path; the fifth path includes: a normally closed time delay contact of a second time relay KT2 connected in series, a second intermediate relay KA2 shared by the submersible pump II and the stirrer III; one end of the fifth path is connected between the first normally closed time delay contact of the first time relay KT1 of the second path and the first intermediate relay KA1, and the other end is connected to the N end of the time sequence circulation control circuit.
Preferably, the set time of the first time relay KT1 is a + B, the set time of the second time relay KT2 is a, and the set time of the third time relay KT3 is C. If the hydraulic retention time of the reaction zone is 9h, the set time of the first time relay KT1 is 7.5h, the set time of the second time relay KT2 is 4.5h, and the set time of the third time relay KT3 is 1.5 h.
Specifically, in step S1, the submersible pump is turned on and the agitator is turned off for a period of time a, and then the normally closed electric shock of the second time relay KT2 in the fifth path is turned off to short-circuit the second intermediate relay KA2, thereby turning off the submersible pump and turning on the agitator;
in the step S2, the submersible pump II is turned off, the stirrer III is turned on, the time is B long, then the first normally closed time delay contact of the first time relay KT1 in the second path is disconnected, the first intermediate relay KA1 is short-circuited, and the stirrer III is turned off; a second normally-closed time delay contact of the first time relay KT1 in the fourth path is opened, so that the second time relay KT2 is short-circuited; a normally open time delay contact of a first time relay KT1 in the fifth path is closed, so that a third time relay KT3 is electrified;
in step S3, the submersible pump and the stirrer are turned off simultaneously for a period of time C, and then the normally closed delay contact of the third time relay KT3 in the first path is opened, so that the first time relay KT1 is short-circuited.
The control mode of the vertical sewage treatment equipment provided by the embodiment of the invention also comprises the following steps before the step S1:
s0: acquiring a command for controlling mode selection, and selecting a control mode according to the command: the control method comprises the following steps of field control, PLC local control, PLC remote control or sequential cycle control.
The submersible motor is provided with two control modes of manual and automatic, and the two control modes are selected through a change-over switch arranged on a control box. The manual operation is controlled by a button on the surface of the control box, and the automatic operation is controlled by a PLC (programmable logic controller) of the sewage treatment station or time sequence control of a time relay.
The present solution is further described below with reference to specific embodiments:
a vertical structure device for sewage treatment adopts a JBR (Jet-aeration Biomembrane Reactor) process, which is called a Jet aeration Biomembrane Reactor and is a new sewage treatment process integrating an activated sludge process and a Biomembrane process. And (3) operating and circulating steps in the JBR equipment: aeration-stirring-standing, the running time of the aeration-stirring-standing method is 3:2:1 compared with the conventional method, and the aeration-stirring-standing method can be correspondingly adjusted according to the actual water quality standard requirements of inlet and outlet water.
The invention not only sets on-site control and local control and remote control completed by PLC, but also sets a time sequence cycle control mode built by time relay combination according to the operation cycle process of JBR equipment for users to select.
The automatic control realized by PLC, degree of automation is high, easily expands, and the price is higher, needs PLC supplier cooperation to maintain. The time sequence cyclic control realized by the time relay is flexible and convenient, has low price and can be maintained by a field engineer.
Establishment code 148-2010 twenty-fourth regulation in the Small town Sewage treatment engineering construction Standard: controlling the production process of sewage treatment plants, wherein the I-III sewage treatment plants mainly adopt centralized manual control and the units are automatically controlled as assistance; the IV sewage treatment plant is preferably controlled in a decentralized and local manner. All power equipment should have field manual operation conditions. The invention is suitable for IV type sewage treatment plants.
The process operation circulation step: aeration-stirring-standing.
(1) Aeration: the submersible pump is turned on + the blender is turned off.
(2) Stirring: submersible pump off + blender on.
(3) Standing: submersible pump off + blender off.
The control process comprises the following steps:
the control process adopted by the invention is as follows: the submersible pump and the stirrer are started simultaneously for 4.5 hours to complete the aeration process; the stirrer is closed for 3 hours, and the stirring process is completed; and simultaneously closing the submersible pump and the stirrer for 1.5 hours to finish the static process. Then simultaneously starting the submersible pump and the stirrer for 4.5 hours, and entering the next circulation process.
In conclusion, the invention provides a flexible and simple control mode for users to select in combination with a vertical structural equipment process for treating sewage, and has the advantages of low manufacturing cost and easy maintenance. The invention is based on the operation cycle steps in JBR equipment: aeration-stirring-standing, the running time of the aeration-stirring-standing method is 3:2:1 compared with the conventional method, and the aeration-stirring-standing method can be correspondingly adjusted according to the actual water quality standard requirements of inlet and outlet water. If the hydraulic retention time of the reaction zone is 9 hours, the aeration time, the stirring time and the retention time are respectively 4.5 hours, 3 hours and 1.5 hours. The JBR equipment is controlled on site by utilizing the time matching arrangement, is a highly integrated sewage treatment integrated structure, is simple to operate, easy to maintain and low in price, and is suitable for small sewage treatment units.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The control mode of the vertical sewage treatment equipment is characterized by comprising the following steps:
s1, starting the submersible pump (II) and turning off the stirrer (III) for the duration of A, and then entering the step S2; the submersible pump (II) is connected with the jet device (I) and is arranged in the biological reaction zone (I) of the vertical sewage treatment equipment; the stirrer (III) is arranged in the biological reaction zone (I) and is lower than the submersible pump (II);
s2, turning off the submersible pump (II) and turning on the stirrer (III) for the time length of B, and then entering the step S3;
s3, turning off the submersible pump (II) and the stirrer (III) at the same time till the time length C, and then entering the step S1.
2. The control mode of the vertical sewage treatment device according to claim 1, wherein the time period A: B: C: 3:2: 1.
3. The control mode of the vertical sewage treatment equipment according to claim 1, wherein the time period A is 4.5 hours, the time period B is 3 hours, and the time period C is 1.5 hours.
4. The control mode of the vertical sewage treatment device according to claim 1, wherein a time sequence cycle control circuit is provided, and the time sequence cycle control circuit comprises: a first time relay (KT1), a second time relay (KT2), a third time relay (KT2), a first intermediate relay (KA1) of the stirrer (c), and a second intermediate relay (KA2) shared by the submersible pump (c) and the stirrer (c);
the contact of first time relay (KT1) establish ties in first auxiliary relay (KA1), the contact of second time relay (KT2) establish ties in second auxiliary relay (KA2), the contact of third time relay (KT2) establish ties in first time relay (KT 1).
5. The control mode of the vertical sewage treatment device according to claim 1, wherein a time sequence cycle control circuit is provided, and the time sequence cycle control circuit comprises: the first path, the second path, the third path and the fourth path are connected in parallel between the KC end and the N end;
the first path comprises: a normally closed time delay contact of a third time relay (KT3) and a first time relay (KT1) which are connected in series;
the second path includes: a first normally closed time delay contact of a first time relay (KT1) and a first intermediate relay (KA1) of the blender (c); the KC end of a first normally closed delay contact of the first time relay (KT1) is connected with the KC end of the time sequence circulation control circuit;
the third path includes: a second normally closed time delay contact of the first time relay (KT1) and a second time relay (KT2) which are connected in series;
the fourth path includes: a normally open time delay contact of a first time relay (KT1) and a third time relay (KT3) which are connected in series;
the timing cycle control circuit further comprises: a fifth path; the fifth path includes: a normally closed time delay contact of a second time relay (KT2) connected in series and a second intermediate relay (KA2) shared by the submersible pump (II) and the stirrer (III); one end of the fifth path is connected between a first normally closed time delay contact of a first time relay (KT1) of the second path and the first intermediate relay (KA1), and the other end of the fifth path is connected to the N end of the time sequence circulation control circuit.
6. The control mode of the vertical sewage treatment apparatus according to claim 5, wherein the set time of the first time relay (KT1) is A + B, the set time of the second time relay (KT2) is A, and the set time of the third time relay (KT3) is C.
7. The control method of the vertical sewage treatment equipment according to claim 6, wherein in the step S1, a submersible pump (II) is turned on and a stirrer (III) is turned off for a period of time A, and then the normally closed electric shock of the second time relay (KT2) in the fifth path is turned off, so that the second intermediate relay (KA2) is short-circuited, thereby turning off the submersible pump (II) and turning on the stirrer (III);
in the step S2, after the submersible pump (II) is turned off and the stirrer (III) is turned on, the time is B long, then a first normally closed time delay contact of the first time relay (KT1) in the second path is disconnected, so that the first intermediate relay (KA1) is in short circuit, and the stirrer (III) is turned off; a second normally-closed time delay contact of the first time relay (KT1) in the fourth path is opened, so that the second time relay (KT2) is short-circuited; a normally open time delay contact of the first time relay (KT1) in the fifth path is closed, so that the third time relay (KT3) is electrified;
in the step S3, the submersible pump (C) and the stirrer (C) are turned off simultaneously for a period of time C, and then the normally closed delay contact of the third time relay (KT3) in the first path is turned off, so that the first time relay (KT1) is short-circuited.
8. The control method of the vertical sewage treatment apparatus according to claim 1, further comprising, before step S1:
s0: acquiring a command for controlling mode selection, and selecting a control mode according to the command: the control method comprises the following steps of field control, PLC local control, PLC remote control or sequential cycle control.
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Application publication date: 20211203 |