CN111099768A - Seawater desalination sequential control device and control method thereof - Google Patents
Seawater desalination sequential control device and control method thereof Download PDFInfo
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- CN111099768A CN111099768A CN201911368036.4A CN201911368036A CN111099768A CN 111099768 A CN111099768 A CN 111099768A CN 201911368036 A CN201911368036 A CN 201911368036A CN 111099768 A CN111099768 A CN 111099768A
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F1/00—Treatment of water, waste water, or sewage
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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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The invention discloses a seawater desalination sequence control device and a control method thereof, and belongs to the technical field of seawater desalination treatment, equipment corresponding to treatment operation can be sequentially started by a main control unit through a main control unit and various sensors and pumps electrically connected with the main control unit according to the treatment sequence of seawater desalination, compared with the prior art that a manual operation mode is adopted, the mode is more time-saving and labor-saving, the requirement on manual skill is low, and the operation is convenient, in addition, a data acquisition module and a wireless transmission unit are arranged, the data reception module is used for receiving data information from the data acquisition module, a signal amplification module is used for transmitting the data information of the data reception module and amplifying the data information, a communication base station is used for a remote transmission carrier of the data information, and various parameters in a seawater desalination treatment system can be remotely transmitted to a mobile terminal of a user in real time through the structure, the remote control of the user is convenient, and the practicability is improved.
Description
Technical Field
The invention relates to the technical field of seawater desalination treatment, in particular to a seawater desalination sequential control device and a control method thereof.
Background
Sea water desalination, namely, sea water desalination is utilized to produce fresh water. The method is an open source increment technology for realizing water resource utilization, can increase the total amount of fresh water, is not influenced by time, space and climate, can ensure stable water supply such as drinking water of coastal residents and water supplement of industrial boilers, and the process of obtaining fresh water from seawater is called seawater desalination. The currently used methods for desalinating seawater include a seawater freezing method, an electrodialysis method, a distillation method, a reverse osmosis method, and an ammonium carbonate ion exchange method, and the currently applied reverse osmosis membrane method and the distillation method are the mainstream in the market.
The main system used by the reverse osmosis method is a reverse osmosis seawater desalination system, and the working principle of the reverse osmosis seawater desalination system is that a membrane which is selective for a permeated substance becomes a semipermeable membrane by utilizing a reverse osmosis membrane separation technology. Generally, a membrane which is permeable only to a solvent but not to a solute is considered as an ideal semipermeable membrane, the magnitude of osmotic pressure depends on the kind of concentrate, and the concentration and temperature are related to the properties of the semipermeable membrane. If a pressure greater than the osmotic pressure is applied to the concentrate side, the solvent in the concentrate flows toward the dilute solution in a direction opposite to that of the original permeate, a process known as reverse osmosis.
However, in the operation process of the reverse osmosis seawater desalination system, due to the lack of a sequential control device, the operation of part of the seawater desalination system needs to be completed manually, and the reverse osmosis seawater desalination system has certain dangerousness, is easy to cause operation accidents, has high requirements on the operation skills of workers, can be operated manually after strict training, wastes time and labor, and therefore, the technical personnel in the field provide the sequential control device for seawater desalination and the control method thereof.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a seawater desalination sequential control device and a control method thereof, and solves the problems that in the operation process of the reverse osmosis seawater desalination system, due to the lack of the sequential control device, the operation of part of the seawater desalination system is still completed manually, and the sequential control device has certain danger, is easy to cause operation accidents, has higher requirement on the operation skills of workers, can be operated manually after strict training, and wastes time and labor.
In order to achieve the purpose, the invention is realized by the following technical scheme: a seawater desalination sequential control device comprises:
the main control unit is used for controlling pumps in the whole seawater desalination treatment system and receiving monitoring signals sent by various sensors;
the human-computer interaction interface is electrically connected with the input end of the main control unit and is responsible for importing an operation instruction and a program required by sequence control operation into the sequence control device;
the data acquisition module is electrically connected with the output end of the main control unit and is used for acquiring various monitoring signals collected in the main control unit in real time;
the wireless transmission unit is electrically connected with the signal output end of the data acquisition module and is responsible for remotely transmitting various monitoring signals acquired by the data acquisition module in real time to a mobile terminal used by a user in a wireless mode;
the warning lamp module is electrically connected with the output end of the main control unit and used for giving an alarm prompt to a worker after the main control unit receives the abnormal monitoring signal;
and the alternating current contactor module is electrically connected with the output end of the main control unit and used for giving control signals to the pumps when the pumps need to be controlled to operate after the main control unit receives the signal instruction of the human-computer interaction interface.
2. The seawater desalination sequential control device as claimed in claim 1, wherein the main control unit comprises an a/D conversion module, an instruction receiving module, a PLC controller and a power supply module, wherein the a/D conversion module is responsible for converting electric signals transmitted by various sensors in real time into digital signals, the instruction receiving module is responsible for receiving control instructions from the human-computer interaction interface, the PLC controller is electrically connected with the a/D conversion module and the instruction receiving module respectively and is responsible for controlling working states of various sensors and pumps, and the power supply module is responsible for providing electric energy for internal electric elements of the whole main control unit.
Preferably, the human-computer interaction interface comprises a sequence control program importing module, a fault display module, an instruction editing module and an instruction sending module, the sequence control program importing module is used for a user to import a corresponding sequence control program into the whole sequence control device, the fault display module is responsible for displaying fault problems existing in the whole seawater desalination treatment system, the instruction editing module is used for the user to manually input a corresponding control instruction into the whole sequence control device, and the instruction sending module is electrically connected with the instruction editing module and is used for sending the instruction to the main control unit.
Preferably, the wireless transmission unit includes a data receiving module, a signal amplifying module and a communication base station, the data receiving module is configured to receive data information from the data acquisition module, the signal amplifying module is electrically connected to the data receiving module, and is configured to transmit and amplify the data information of the data receiving module, and the communication base station is configured to remotely transport a carrier of the data information.
Preferably, the ac contactor module includes a plurality of ac contactors, is ac contactor I, ac contactor II, ac contactor III, ac contactor IV and ac contactor V respectively, ac contactor I, ac contactor II, ac contactor III, ac contactor IV and ac contactor V correspond the pump class that exists in the control sea water desalination system respectively.
Preferably, the warning light module includes a plurality of warning lights, is warning light I, warning light II, warning light III and warning light IV respectively, warning light I, warning light II, warning light III and warning light IV correspond each sensor in the sea water desalination system respectively.
Preferably, the control method of the seawater desalination sequential control device comprises the following steps:
s1, installing the seawater desalination sequential control device into the whole seawater desalination treatment system, and respectively connecting the seawater desalination sequential control device with signal ends of various sensors and a plurality of delivery pumps;
s2, importing a corresponding sequence control program into the whole sequence control device through the sequence control program importing module, and manually inputting a corresponding operation instruction by using the instruction editing module;
s3, starting a water supply pump by the main control unit according to the treatment sequence of the seawater desalination treatment system, injecting seawater into the raw water pool, and pretreating the seawater;
s4, starting a booster pump, injecting pretreated seawater in the raw water pool into the intermediate water pool, and adding a medicament corresponding to seawater treatment into the intermediate water pool through a medicament adding pump;
s5, starting a high-pressure pump I, injecting the seawater treated by the medicament in the intermediate water tank into a reverse osmosis device, performing reverse osmosis treatment on the seawater, starting a reverse osmosis pump periodically, injecting a clean water source into the reverse osmosis device, and cleaning salts produced in the reverse osmosis device;
and S6, starting the high-pressure pump II, injecting the purified water obtained after the treatment of the reverse osmosis device into a purified water tank, and storing.
Preferably, a liquid level sensor I, an electromagnetic valve I and a turbidity sensor I are respectively installed in the raw water pool, and the liquid level sensor I, the electromagnetic valve I and the turbidity sensor I are electrically connected with the sequential control device;
and a liquid level sensor II, an electromagnetic valve II and a turbidity sensor II are respectively arranged in the middle water tank, and the liquid level sensor II, the electromagnetic valve II and the turbidity sensor II are electrically connected with the sequential control device.
Preferably, the reverse osmosis device is internally provided with an A, B membrane transposition motor, a sewage discharge motor, a pressure sensor and a back flush electromagnetic valve respectively, the A, B membrane transposition motor, the sewage discharge motor, the pressure sensor and the back flush electromagnetic valve are electrically connected with the sequential control device, and the pressure sensor is connected in series in a connecting pipeline of the reverse osmosis device.
Preferably, the clean water reservoir is internally provided with a liquid level sensor III, an electromagnetic valve III and a turbidity sensor III respectively, and the liquid level sensor III, the electromagnetic valve III and the turbidity sensor III are all electrically connected with the sequential control device.
Advantageous effects
The invention provides a seawater desalination sequential control device and a control method thereof. Compared with the prior art, the method has the following beneficial effects:
1. the seawater desalination sequential control device can sequentially start equipment corresponding to treatment operation through the main control unit and each sensor and pump which are electrically connected with the main control unit according to the treatment sequence of seawater desalination, compared with the manual operation mode adopted in the prior art, the mode is more time-saving and labor-saving, has low requirement on manual skill and is convenient to operate, and is additionally provided with a data acquisition module and a wireless transmission unit, the wireless transmission unit comprises a data receiving module, a signal amplification module and a communication base station, the data receiving module is used for receiving data information from the data acquisition module, the signal amplification module is electrically connected with the data receiving module and is used for transmitting the data information of the data receiving module and amplifying the data information, the communication base station is used for a remote transmission carrier of the data information, and by the structure, various parameters in the seawater desalination treatment system can be remotely transmitted to a mobile terminal of a user in real time, so that the remote control of the user is facilitated, and the practicability is improved.
2. According to the control method of the seawater desalination sequential control device, the corresponding sensors and the corresponding delivery pumps are installed in the corresponding processing equipment in the seawater desalination processing system, and the seawater desalination sequential control device can be used for monitoring the processing conditions in each equipment in real time, preventing the seawater desalination processing system from being shut down due to faults, avoiding economic loss, and being scientific and reasonable in structure and safe and convenient to use.
Drawings
FIG. 1 is a block diagram schematically illustrating the structure of the present invention;
FIG. 2 is a block diagram schematically illustrating the structure of a main control unit according to the present invention;
FIG. 3 is a block diagram illustrating the structure of a human-computer interface according to the present invention;
FIG. 4 is a block diagram schematically illustrating the structure of a wireless transmission unit according to the present invention;
FIG. 5 is a block diagram schematically illustrating the structure of an AC contactor module according to the present invention;
FIG. 6 is a block diagram schematically illustrating the structure of the warning light module according to the present invention;
FIG. 7 is a block diagram schematically illustrating the structure of the control method of the present invention;
FIG. 8 is a block diagram schematically illustrating the structure of a raw water pool according to the present invention;
FIG. 9 is a schematic block diagram of the structure of the intermediate water tank of the present invention;
FIG. 10 is a block diagram schematically showing the construction of a reverse osmosis apparatus according to the present invention;
fig. 11 is a schematic block diagram of the structure of a clean water reservoir of the invention.
In the figure: 1. a main control unit; 101. an A/D conversion module; 102. an instruction receiving module; 103. a PLC controller; 104. a power supply module; 2. a human-computer interaction interface; 21. a sequence control program is led into a module; 22. a fault display module; 23. an instruction editing module; 24. an instruction sending module; 3. a data acquisition module; 4. a wireless transmission unit; 41. a data receiving module; 42. a signal amplification module; 43. a communication base station; 5. a mobile terminal; 6. an AC contactor module; 61. an alternating current contactor I; 62. an alternating current contactor II; 63. an alternating current contactor III; 64. an AC contactor IV; 65. an AC contactor V; 7. a warning light module; 71. a warning light I; 72. a warning light II; 73. a warning light III; 74. a warning light IV;
A. a water supply pump; B. a raw water pool; b1, a liquid level sensor I; b2, an electromagnetic valve I; b3, turbidity sensor I; C. a booster pump; D. a middle water tank; d1, a liquid level sensor II; d2 and an electromagnetic valve II; d3, turbidity sensor II; E. a dosing pump; F. a high-pressure pump I; G. a reverse osmosis unit; g1, A, B film transposition motor; g2, a sewage discharge motor; g3, pressure sensor; g4, a backwashing electromagnetic valve; H. a backwash pump; I. a high-pressure pump II; J. a clear water tank; j1, liquid level sensor III; j2, electromagnetic valve III; j3, turbidity sensor III.
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.
Referring to fig. 1, the present invention provides a technical solution: a seawater desalination sequential control device comprises:
the main control unit 1 is used for controlling pumps in the whole seawater desalination treatment system and receiving monitoring signals sent by various sensors;
the human-computer interaction interface 2 is electrically connected with the input end of the main control unit 1 and is responsible for importing an operation instruction and a program required by sequence control operation into the sequence control device;
the data acquisition module 3 is electrically connected with the output end of the main control unit 1 and is used for acquiring various monitoring signals collected in the main control unit 1 in real time;
the wireless transmission unit 4 is electrically connected with the signal output end of the data acquisition module 3 and is responsible for remotely transmitting various monitoring signals acquired by the data acquisition module 3 in real time to the mobile terminal 5 used by a user in a wireless mode;
the warning lamp module 7 is electrically connected with the output end of the main control unit 1 and used for giving an alarm prompt to a worker after the main control unit 1 receives the abnormal monitoring signal;
and the alternating current contactor module 6 is electrically connected with the output end of the main control unit 1 and used for giving control signals to the pumps when the pumps need to be controlled to operate after the main control unit 1 receives the signal instruction of the human-computer interaction interface 2.
Referring to fig. 2, the main control unit 1 includes an a/D conversion module 101, an instruction receiving module 102, a PLC controller 103 and a power supply module 104, the a/D conversion module 101 is responsible for converting electric signals transmitted by various sensors in real time into digital signals, the instruction receiving module 102 is responsible for receiving control instructions from the human-computer interface 2, the PLC controller 103 is electrically connected to the a/D conversion module 101 and the instruction receiving module 102 respectively and is responsible for controlling working states of various sensors and pumps, and the power supply module 104 is responsible for providing electric energy for internal electric components of the whole main control unit 1.
Referring to fig. 3, the human-computer interaction interface 2 includes a sequence control program importing module 21, a fault display module 22, an instruction editing module 23, and an instruction sending module 24, where the sequence control program importing module 21 is used for a user to import a corresponding sequence control program into the whole sequence control device, the fault display module 22 is responsible for displaying a fault problem existing in the whole seawater desalination processing system, the instruction editing module 23 is used for the user to manually input a corresponding control instruction into the whole sequence control device, and the instruction sending module 24 is electrically connected to the instruction editing module 23 and is used for sending the instruction to the main control unit 1.
Referring to fig. 4, the wireless transmission unit 4 includes a data receiving module 41, a signal amplifying module 42 and a communication base station 43, the data receiving module 41 is configured to receive data information from the data acquisition module 3, the signal amplifying module 42 is electrically connected to the data receiving module 41 and configured to transmit and amplify the data information of the data receiving module 41, and the communication base station 43 is configured to remotely transport a carrier of the data information.
Referring to fig. 5, the ac contactor module 6 includes a plurality of ac contactors, which are an ac contactor I61, an ac contactor II62, an ac contactor III63, an ac contactor IV64, and an ac contactor V65, and the ac contactor I61, the ac contactor II62, the ac contactor III63, the ac contactor IV64, and the ac contactor V65 respectively control pumps in the seawater desalination system.
Referring to fig. 6, the warning light module 7 includes a plurality of warning lights, which are a warning light I71, a warning light II72, a warning light III73 and a warning light IV74, wherein the warning light I71, the warning light II72, the warning light III73 and the warning light IV74 respectively correspond to each sensor in the seawater desalination system.
Referring to fig. 7, a method for controlling a sequential control device for seawater desalination includes the following steps:
s1, installing the seawater desalination sequential control device into the whole seawater desalination treatment system, and respectively connecting the seawater desalination sequential control device with signal ends of various sensors and a plurality of delivery pumps;
s2, a sequence control program is imported into the whole sequence control device through the sequence control program import module 21, and a corresponding operation instruction is manually input through the instruction editing module 23;
s3, starting a water supply pump A by the main control unit 1 according to the treatment sequence of the seawater desalination treatment system, injecting seawater into a raw water pool B, and pretreating the seawater;
s4, starting a booster pump C, injecting the pretreated seawater in the raw water pool B into an intermediate water pool D, and adding a medicament corresponding to seawater treatment into the intermediate water pool D through a medicament adding pump E;
s5, starting a high-pressure pump IF, injecting the seawater treated by the medicament in the intermediate water tank D into a reverse osmosis device G, performing reverse osmosis treatment on the seawater, periodically starting a reverse osmosis pump H, injecting a clean water source into the reverse osmosis device G, and cleaning salts produced in the reverse osmosis device G;
s6, starting the high-pressure pump III, injecting the purified water obtained after the treatment of the reverse osmosis device G into a purified water tank J, and storing.
Referring to fig. 8, a liquid level sensor IB1, an electromagnetic valve IB2 and a turbidity sensor IB3 are respectively installed in the raw water tank B, and the liquid level sensor IB1, the electromagnetic valve IB2 and the turbidity sensor IB3 are all electrically connected to the sequential control device.
Referring to fig. 9, a liquid level sensor IID1, an electromagnetic valve IID2 and a turbidity sensor IID3 are respectively installed in the middle pool D, and the liquid level sensor IID1, the electromagnetic valve IID2 and the turbidity sensor IID3 are electrically connected to the sequential control device.
Referring to fig. 10, an A, B membrane transposition motor G1, a sewage discharge motor G2, a pressure sensor G3, a backwash solenoid valve G4, a A, B membrane transposition motor G1, a sewage discharge motor G2, a pressure sensor G3 and a backwash solenoid valve G4 are respectively installed in the reverse osmosis device G and electrically connected to the sequential control device, and the pressure sensor G3 is connected in series to a connecting pipeline of the reverse osmosis device G.
Referring to fig. 11, a liquid level sensor IIIJ1, a solenoid valve IIIJ2 and a turbidity sensor IIIJ3 are respectively installed in the water purification tank J, and the liquid level sensor IIIJ1, the solenoid valve IIIJ2 and the turbidity sensor IIIJ3 are electrically connected to the sequential control device.
It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A seawater desalination sequential control device is characterized by comprising:
the main control unit (1) is used for controlling pumps in the whole seawater desalination treatment system and receiving monitoring signals sent by various sensors;
the human-computer interaction interface (2) is electrically connected with the input end of the main control unit (1) and is responsible for importing an operation instruction and a program required by sequence control operation into the sequence control device;
the data acquisition module (3) is electrically connected with the output end of the main control unit (1) and is used for acquiring various monitoring signals collected in the main control unit (1) in real time;
the wireless transmission unit (4) is electrically connected with the signal output end of the data acquisition module (3) and is responsible for remotely transmitting various monitoring signals acquired by the data acquisition module (3) in real time to a mobile terminal (5) used by a user in a wireless mode;
the warning lamp module (7) is electrically connected with the output end of the main control unit (1) and is used for giving an alarm prompt to a worker after the main control unit (1) receives the abnormal monitoring signal;
and the alternating current contactor module (6) is electrically connected with the output end of the main control unit (1) and is used for giving control signals to the pumps when the pumps need to be controlled to operate after the main control unit (1) receives the signal instruction of the human-computer interaction interface (2).
2. The seawater desalination sequential control device according to claim 1, wherein the main control unit (1) comprises an a/D conversion module (101), a command receiving module (102), a PLC controller (103) and a power supply module (104), the a/D conversion module (101) is responsible for converting electric signals transmitted by various sensors in real time into digital signals, the command receiving module (102) is responsible for receiving control commands from the human-computer interaction interface (2), the PLC controller (103) is electrically connected with the a/D conversion module (101) and the command receiving module (102) respectively and is responsible for controlling working states of various sensors and pumps, and the power supply module (104) is responsible for providing electric energy for internal electric elements of the whole main control unit (1).
3. The seawater desalination sequential control device according to claim 1, wherein the human-computer interaction interface (2) comprises a sequential control program importing module (21), a fault display module (22), an instruction editing module (23) and an instruction sending module (24), the sequential control program importing module (21) is used for importing a corresponding sequential control program into the whole sequential control device by a user, the fault display module (22) is responsible for displaying fault problems existing in the whole seawater desalination processing system, the instruction editing module (23) is used for the user to manually input corresponding control instructions into the whole sequential control device, and the instruction sending module (24) is electrically connected with the instruction editing module (23) and is used for sending instructions to the main control unit (1).
4. The sequential control device for seawater desalination according to claim 1, wherein the wireless transmission unit (4) comprises a data receiving module (41), a signal amplifying module (42) and a communication base station (43), the data receiving module (41) is used for receiving data information from the data acquisition module (3), the signal amplifying module (42) is electrically connected with the data receiving module (41) and is used for transmitting and amplifying the data information of the data receiving module (41), and the communication base station (43) is used for remote transmission of data information.
5. The sequential control device for seawater desalination according to claim 1, wherein the ac contactor module (6) comprises a plurality of ac contactors, namely an ac contactor I (61), an ac contactor II (62), an ac contactor III (63), an ac contactor IV (64), and an ac contactor V (65), and the ac contactor I (61), the ac contactor II (62), the ac contactor III (63), the ac contactor IV (64), and the ac contactor V (65) respectively control pumps existing in the seawater desalination system.
6. The seawater desalination sequential control device according to claim 1, wherein the warning lamp module (7) comprises a plurality of warning lamps, namely a warning lamp I (71), a warning lamp II (72), a warning lamp III (73) and a warning lamp IV (74), and the warning lamp I (71), the warning lamp II (72), the warning lamp III (73) and the warning lamp IV (74) respectively correspond to each sensor in the seawater desalination system.
7. A control method of a seawater desalination sequential control device is characterized by comprising the following steps:
s1, installing the seawater desalination sequential control device into the whole seawater desalination treatment system, and respectively connecting the seawater desalination sequential control device with signal ends of various sensors and a plurality of delivery pumps;
s2, a corresponding sequence control program is imported into the whole sequence control device through the sequence control program import module (21), and a corresponding operation instruction is manually input through the instruction editing module (23);
s3, starting a water supply pump (A) by the main control unit (1) according to the treatment sequence of the seawater desalination treatment system, injecting seawater into a raw water pool (B), and pretreating the seawater;
s4, starting a booster pump (C), injecting pretreated seawater in the raw water pool (B) into an intermediate water pool (D), and adding a medicament corresponding to seawater treatment into the intermediate water pool (D) through a medicament adding pump (E);
s5, starting a high-pressure pump I (F), injecting the seawater treated by the medicament in the middle water tank D into a reverse osmosis device G, performing reverse osmosis treatment on the seawater, periodically starting a back-flushing pump H, injecting a clean water source into the reverse osmosis device G, and cleaning salts produced in the reverse osmosis device G;
s6, starting the high-pressure pump II (I), injecting the purified water obtained after the treatment of the reverse osmosis device G into the purified water tank J, and storing.
8. The seawater desalination sequential control device of claim 7, wherein a liquid level sensor I (B1), an electromagnetic valve I (B2) and a turbidity sensor I (B3) are respectively installed in the raw water tank (B), and the liquid level sensor I (B1), the electromagnetic valve I (B2) and the turbidity sensor I (B3) are electrically connected with the sequential control device;
liquid level sensor II (D1), solenoid valve II (D2) and turbidity sensor II (D3) are respectively installed to the built-in liquid level sensor II (D1), solenoid valve II (D2) and turbidity sensor II (D3) of installing in middle pond (D) all with in proper order controlling means electric connection.
9. The sequential control device for seawater desalination as claimed in claim 7, wherein A, B membrane transposition motors (G1), sewage discharge motors (G2), pressure sensors (G3) and back-flushing solenoid valves (G4) are respectively installed in the reverse osmosis device (G), the A, B membrane transposition motors (G1), the sewage discharge motors (G2), the pressure sensors (G3) and the back-flushing solenoid valves (G4) are all electrically connected with the sequential control device, and the pressure sensors (G3) are connected in series in the connecting pipeline of the reverse osmosis device (G).
10. The seawater desalination sequential control device as claimed in claim 7, wherein a liquid level sensor III (J1), a solenoid valve III (J2) and a turbidity sensor III (J3) are respectively installed in the clear water reservoir (J), and the liquid level sensor III (J1), the solenoid valve III (J2) and the turbidity sensor III (J3) are all electrically connected with the sequential control device.
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