CN106932260B - Automatic filtering and back-flushing device for seawater sample - Google Patents
Automatic filtering and back-flushing device for seawater sample Download PDFInfo
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- CN106932260B CN106932260B CN201710072837.0A CN201710072837A CN106932260B CN 106932260 B CN106932260 B CN 106932260B CN 201710072837 A CN201710072837 A CN 201710072837A CN 106932260 B CN106932260 B CN 106932260B
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Abstract
The invention discloses an automatic filtering and backwashing device for a seawater sample, which mainly comprises two parts, namely a seawater automatic filtering system and a pipeline backwashing system, which are respectively controlled by a main control system and mainly comprise a water collecting device, a diaphragm pump, a grading filtering device, a nutrient salt detector, a waste liquid pool, an ozone generator and a series of electromagnetic valves. The device can perform on-line analysis on the water sample conveyed to the nutritive salt detector, transmits analysis data back to the ground control console through the main controller, can realize automatic filtration and automatic detection and analysis of the seawater sample, and performs back flush on a filtered water distribution pipeline and a detection instrument.
Description
Technical Field
The invention relates to a surface water quality detection device, in particular to an automatic detection device for an ocean water sample, which is applied to the technical field of ocean environment monitoring equipment.
Background
The marine environment monitoring is an important component for developing marine strategies, and the current marine monitoring task of China is executed by a marine management organization in China and aims to monitor and maintain the safety of the marine environment in China. Due to the severe working conditions at sea, a large ship is used for carrying professional monitoring equipment to carry out operation tasks at sea at present. The single attendance cost is high, the required corresponding matched resources and facilities are hundreds of thousands, and even the detection task still needs a large amount of professional personnel to classify and process the collected water samples. As the offshore water quality sampling workers have higher operation risk and overhigh working strength, the full play of the monitoring capability of human beings on the marine environment is influenced.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to overcome the defects in the prior art, and provides an automatic seawater sample filtering and backwashing device which is simple and reliable in structure and convenient to operate, can realize automatic filtering of a seawater sample, and can perform backwashing on a filtered water distribution pipeline and a filtering device, so that the automation of water sample conveying, detection, analysis and backwashing of the water distribution pipeline is basically realized.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme:
the utility model provides a sea water sample automatic filtration and back flush system, mainly includes sea water automatic filtration system and pipeline back flush system two parts, is controlled by master control system respectively, specifically as follows:
the seawater automatic filtering system mainly comprises a water collecting device, a diaphragm pump, a graded filtering device, a nutrient salt detector, a waste liquid pool and a series of electromagnetic valves, wherein a water outlet of the water collecting device is communicated with a suction inlet of the diaphragm pump, a seawater sample can be sucked and conveyed by the water collecting device by utilizing the diaphragm pump, at least a water sample filtering and detecting pipeline is arranged between the water outlet of the diaphragm pump and the waste liquid pool, the water sample filtering and detecting pipeline is sequentially formed by connecting a first electromagnetic valve, the graded filtering device, a second electromagnetic valve, the nutrient salt detector and a third electromagnetic valve in series, the first electromagnetic valve is arranged between the diaphragm pump and the graded filtering device, a data output end of the nutrient salt detector is in signal connection with an information receiving end of a main control system, signal receiving ends of the water collecting device, the diaphragm pump and the electromagnetic valves are respectively in signal connection with an instruction information output end of the main control system, filtered water after, then the water sample enters a nutrient salt detector to detect and analyze the nutrient salt of the water sample, thereby completing the automatic filtration and automatic detection of the water sample;
the pipeline backwashing system mainly comprises an ozone generator, a grading filter device, a front end electromagnetic valve group and a rear end electromagnetic valve group which are in signal connection with the main control system, the ozone generator is used for preparing ozone gas, sterilizing and disinfecting water in the pipeline backwashing system, directly connecting a water inlet of an ozone generator with a water tap, respectively communicating a cleaning water delivery pipe treated by the ozone generator with water inlet pipes of each stage of filtering units of the stage filtering device, respectively arranging a front end electromagnetic valve group and a rear end electromagnetic valve group at the water inlet and outlet ends of the stage filtering device, the front-end electronic valve group and the rear-end electromagnetic valve group are controlled to respectively convey washing water to each stage of filtering units of the graded filtering device, and after the automatic detection of the water sample is finished, and (3) flushing attachments on the inner wall of each water distribution pipeline to the waste liquid pool by using high-pressure water flow, and flushing a water passing cavity of the graded filtering device.
As the preferable technical scheme of the invention, in the automatic seawater filtering system, different filter elements with the porosity range of 0.45-100 mu are adopted by each stage of filtering units of the grading filtering device.
As a further preferable technical scheme of the scheme, each stage of filtering units of the graded filtering device respectively adopt a 100 mu filter element, a 1 mu filter element and a 0.45 mu filter element, and each stage of filtering units form a three-stage filtering device by series connection, so that a water sample flows in sequence from high to low in filtering porosity, sequentially passes through the 100 mu filter element, the 1 mu filter element and the 0.45 mu filter element, and finally filtered water flowing out of the 0.45 mu filter element meets the requirements of a sample for detecting the nutritive salt in a detector, and then enters a subsequent detection process.
As a further preferable technical solution of the above scheme, in the pipeline backwashing system, the front end solenoid valve set includes a fourth solenoid valve, a fifth solenoid valve and a sixth solenoid valve, the rear end solenoid valve set includes a seventh solenoid valve, an eighth solenoid valve and a ninth solenoid valve, the fourth solenoid valve and the seventh solenoid valve are respectively disposed at both ends of a water inlet and a water outlet of the 100 μ filter, a 100 μ filter flushing unit pipeline is formed between a water outlet pipe of the ozone generator and the waste liquid tank, the 100 μ filter is flushed by the cleaning water entering the 100 μ filter flushing pipeline, the fifth solenoid valve and the eighth solenoid valve are respectively disposed at both ends of a water inlet and a water outlet of the 1 μ filter, a 1 μ filter flushing unit pipeline is formed between the water outlet pipe of the ozone generator and the waste liquid tank, the 1 μ filter is flushed by the cleaning water entering the 1 μ filter flushing pipeline, the sixth solenoid valve and the ninth solenoid valve are respectively disposed at both ends of a water inlet and a, a 0.45 mu filter element flushing unit pipeline is formed between a water outlet pipe of the ozone generator and the waste liquid pool, and the 0.45 mu filter element is flushed by the cleaning water entering the 0.45 mu filter element flushing pipeline; the washing water provided by the ozone generator is controlled by controlling the front-end electronic valve group and the rear-end electromagnetic valve group to respectively convey the washing water to each stage of filtering units of the graded filtering device, respectively washing each stage of filtering units of the graded filtering device, and controlling the front-end electromagnetic valve group and the rear-end electromagnetic valve group.
As a further preferred technical scheme of the above scheme, an overpressure protection pipeline is arranged in the seawater automatic filtration system, the overpressure protection pipeline is connected with the water sample filtration and detection pipeline in parallel, and a safety valve is arranged on the overpressure protection pipeline and is also arranged between a water outlet pipe of a water outlet of the diaphragm pump and the waste liquid pool to form an auxiliary safety control pipeline of the seawater automatic filtration system.
As a further preferable technical solution of the above scheme, in the seawater automatic filtration system, an auxiliary diaphragm pump in signal connection with the main control system is further provided, the auxiliary diaphragm pump is used as a second water pump, and the pipeline connection mode of the auxiliary diaphragm pump is completely the same as that of the diaphragm pump, so that the water outlet of the water sampling device is communicated with the suction inlet of the auxiliary diaphragm pump, and the seawater sample can be sucked and conveyed by the water sampling device through the auxiliary diaphragm pump.
As a further preferable technical scheme of the above scheme, in the pipeline backwashing system, the nutrient salt detection pipeline formed by connecting the second electromagnetic valve, the nutrient salt detector and the third electromagnetic valve in series can be cleaned, that is, by controlling the corresponding electromagnetic valve, the cleaning water provided by the water outlet pipe of the ozone generator washes the nutrient salt detector, and the attachments on the inner wall of the nutrient salt detection pipeline and the inner wall of the water passing cavity of the nutrient salt detector are washed to the waste liquid tank.
In a further preferred embodiment of the above-mentioned solution, in the seawater automatic filtration system, a main washing water pipe solenoid valve in signal connection with the main control system is further provided on a main outlet pipe of the ozone generator, and the ozone generator is controlled to supply washing water by controlling the main washing water pipe solenoid valve and the front end solenoid valve group.
As a further preferable technical solution of the above scheme, the master control system adopts a PLC programmable controller, and the master control system can also transmit the analysis data back to the ground console.
As a further preferable technical solution of the above scheme, in the seawater automatic filtration system, the water sampling device employs a winch, and the seawater sample is sucked and lifted from the water surface by jointly utilizing the diaphragm pump, and then is transported to the subsequent process by the diaphragm pump.
Compared with the prior art, the invention has the following obvious and prominent substantive characteristics and remarkable advantages:
1. the device can automatically filter, detect and analyze a seawater sample, backwash a water distribution pipeline and efficiently detect the seawater quality, and has the advantages of high intelligent degree, simple operation and reliable result;
2. the device has compact structure, light weight and high automation degree, is convenient for carrying field operation or ocean operation, obviously reduces the operation risk of offshore water quality sampling workers, effectively reduces the working strength of the offshore water quality sampling workers, and has important significance for gradually improving the automation level of sea area monitoring around the island.
Drawings
Fig. 1 is a schematic diagram of a piping system connection structure of an automatic seawater sample filtering and backwashing device according to an embodiment of the present invention.
Fig. 2 is a schematic view of a pipeline system connection structure of an automatic seawater filtration system according to an embodiment of the present invention.
Fig. 3 is a schematic view of a pipeline system connection structure of a pipeline backwashing system according to a first embodiment of the present invention.
Fig. 4 is a schematic view of a pipeline system connection structure of a pipeline backwashing system according to a second embodiment of the present invention.
Detailed Description
The preferred embodiments of the invention are detailed below:
the first embodiment is as follows:
in this embodiment, referring to fig. 1 to 3, an automatic seawater sample filtering and backwashing device mainly includes two parts, namely a seawater automatic filtering system and a pipeline backwashing system, which are respectively controlled by a main control system, specifically as follows:
the seawater automatic filtration system mainly comprises a water collecting device 2, a diaphragm pump 4, a graded filtration device formed by connecting different filter elements with the porosity range of 0.45-100 mu in series, a nutrient salt detector 15, a waste liquid pool 19 and a series of electromagnetic valves, wherein a water outlet of the water collecting device 2 is communicated with a suction inlet of the diaphragm pump 4, a seawater sample can be sucked and conveyed by the diaphragm pump 4 through the water collecting device 2, at least a water sample filtration and detection pipeline is arranged between the water outlet of the diaphragm pump 4 and the waste liquid pool 19, the water sample filtration and detection pipeline is formed by connecting a first electromagnetic valve 5, the graded filtration device, a second electromagnetic valve 14, a nutrient salt detector 15 and a third electromagnetic valve 16 in series in sequence, the first electromagnetic valve 5 is arranged between the diaphragm pump 4 and the graded filtration device, the data output end of the nutrient salt detector 15 is in signal connection with an information receiving end of a main control system, the signal receiving ends of the diaphragm pump 4 and the electromagnetic valves are respectively in signal connection with the instruction information output end of the main control system, filtered water reaches the requirement of a sample for detection of the nutrient salt detector 15 after being filtered by the graded filtering device, and then enters the nutrient salt detector 15 to detect and analyze nutrient salts in a water sample, thereby completing automatic filtration and automatic detection of the water sample, the nutrient salt detector 15 is used for detecting nutrient salt parameters of the filtered water sample, analyzing various nutrient salt parameter values of the water sample in real time, and further judging whether the seawater is polluted, as shown in fig. 1 and 2, the main control system adopts a PLC (programmable logic controller), and the PLC is used for controlling the opening and closing of various circuit components in the pipeline, and further controlling the working state of the water distribution pipeline. Meanwhile, the data obtained by the nutrient salt detector 15 is transmitted back to the ground console through the PLC;
the pipeline back flushing system mainly comprises an ozone generator 1, a grading filter device, a front end electromagnetic valve group and a rear end electromagnetic valve group which are in signal connection with a main control system, wherein the ozone generator 1 is used for preparing ozone gas, sterilizing and disinfecting water in the pipeline back flushing system to ensure smooth pipeline back flushing, a water inlet of the ozone generator 1 is directly connected with a water tap, a cleaning water delivery pipe processed by the ozone generator 1 is respectively communicated with water inlet pipes of filtering units of the grading filter device, the front end electromagnetic valve group and the rear end electromagnetic valve group are respectively arranged at the water inlet and outlet ends of the grading filter device, clean water is respectively delivered to the filtering units of the grading filter device by controlling the front end electronic valve group and the rear end electromagnetic valve group, and after automatic detection of the pipeline back flushing system is completed, attachments on the inner wall of each water distribution pipeline are flushed to a waste liquid pool 19 by high-pressure water flow, and the water passing chamber of the staged filtering device is flushed as shown in fig. 1 and 3. In the present embodiment, referring to fig. 1 to 3, the waste liquid tank 19 is shared by the water sample filtering system and the pipeline back flushing system. This embodiment is used for sampling filtration analysis to the sea water of 3 different depths in 1 website, and the water sample directly accomplishes the analytic process in nutritive salt detector 15 to through PLC programmable controller with data transmission to monitoring station. After the water sample detection of one degree of depth is accomplished, with remaining water sample evacuation in the pipeline to pipeline inner wall and detecting system's work cavity inner wall, the guarantee continues to carry out next degree of depth sea water sample detection.
In this embodiment, referring to fig. 1 to 3, each stage of filtering units of the graded filtering device respectively adopts a 100 μ filter element 8, a 1 μ filter element 9 and a 0.45 μ filter element 13, and each stage of filtering units form a three-stage filtering device by being connected in series, which can not only avoid the blocking of a filtering pipeline, but also ensure finer filtering, in this embodiment, a water sample flows in the order of filtering porosity from high to low, and sequentially passes through the 100 μ filter element 8, the 1 μ filter element 9 and the 0.45 μ filter element 13, and finally, filtered water flowing out of the 0.45 μ filter element 13 meets the requirements of a sample for detection of a nutrient salt detector 15, and then enters a subsequent detection process. Referring to fig. 1 and 3, in the pipeline back flushing system, the front end electromagnetic valve set includes a fourth electromagnetic valve 10, a fifth electromagnetic valve 11 and a sixth electromagnetic valve 12, the rear end electromagnetic valve set includes a seventh electromagnetic valve 6, an eighth electromagnetic valve 7 and a ninth electromagnetic valve 17, the fourth electromagnetic valve 10 and the seventh electromagnetic valve 6 are respectively disposed at two ends of a water inlet and a water outlet of a 100 μ filter element 8, a 100 μ filter element flushing unit pipeline is formed between a water outlet pipe of an ozone generator 1 and a waste liquid tank 19, the 100 μ filter element 8 is flushed by cleaning water entering the 100 μ filter element flushing pipeline, the fifth electromagnetic valve 11 and the eighth electromagnetic valve 7 are respectively disposed at two ends of a water inlet and a water outlet of a 1 μ filter element 9, a 1 μ filter element flushing unit pipeline is formed between a water outlet pipe of the ozone generator 1 and the waste liquid tank 19, the 1 μ filter element 9 is flushed by cleaning water entering the 1 μ filter element flushing pipeline, the sixth electromagnetic valve 12 and the ninth electromagnetic valve 17 are respectively disposed at two, a 0.45 mu filter element flushing unit pipeline is formed between a water outlet pipe of the ozone generator 1 and the waste liquid pool 19, and the 0.45 mu filter element 13 is flushed by the cleaning water entering the 0.45 mu filter element flushing pipeline; the washing water is respectively conveyed to each stage of filtering units of the graded filtering device by controlling the front-end electronic valve group and the rear-end electromagnetic valve group, the filtering units of the graded filtering device are respectively washed, and the washing water provided by the ozone generator 1 is controlled by controlling the front-end electronic valve group and the rear-end electromagnetic valve group.
In this embodiment, as shown in fig. 1 and 3, an overpressure protection pipeline is disposed in the seawater automatic filtration system, the overpressure protection pipeline is connected in parallel with the water sample filtration and detection pipeline, and a safety valve 18 is disposed on the overpressure protection pipeline, so that the safety valve 18 is also disposed between the water outlet pipe of the water outlet of the diaphragm pump 4 and the waste liquid tank 19, thereby forming an auxiliary safety control pipeline of the seawater automatic filtration system. The safety valve 18 is installed in the water distribution pipeline, and needs to be subjected to preset pressure, and when the water pressure in the pipeline is greater than the preset pressure value of the safety valve 18, the safety valve 18 is opened to release the pressure, so that the pipeline is prevented from being burst due to overhigh water pressure.
In this embodiment, as shown in fig. 1 and 2, in the automatic seawater filtration system, a washing water main pipe electromagnetic valve 3 in signal connection with the main control system is further provided on the water outlet main pipe of the ozone generator 1, and the ozone generator 1 is controlled to supply washing water by controlling the washing water main pipe electromagnetic valve 3 and the front end electromagnetic valve group.
In the present embodiment, as shown in fig. 1 and 2, in the automatic seawater filtration system, a water sampling device 2 employs a winch, and a diaphragm pump 4 is used in combination to suck and lift a seawater sample from a water surface, and then the seawater sample is transported to a subsequent process by the diaphragm pump 4. The water sampling device 2 of the device comprises a winch, a water pump and a plurality of large-diameter water pipes. The seawater sample is sucked into the large-diameter water pipe by the water pump and then conveyed after being lifted by the winch, and the device is compact in structure and easy to assemble and use.
In this embodiment, the automatic water sample filtering system is shown in fig. 2, and the system work flow, i.e. the water sample filtering process, is as follows:
the water sample filtration system is opened to the control cabinet staff, diaphragm pump 2 opens, and first solenoid valve 5 opens, and the water sample that water sampling device 2 gathered gets into the distribution pipeline through diaphragm pump 4, and when the distribution pipeline water pressure was too high and reached the relief valve 18 setting value, relief valve 18 opened, and the rivers direction in the pipeline was water sampling device 2 → diaphragm pump 4 → first solenoid valve 5 → relief valve 18 → waste liquid pond 19 this moment. Before water sample filtration, firstly, the pipeline needs to be soaked, the residual water sample in the pipeline is discharged, the influence of the previous detection on the detection result is avoided, namely, the diaphragm pump 4 and the first electromagnetic valve 5 are kept open, the second electromagnetic valve 14 and the third electromagnetic valve 16 are also opened, and the second electromagnetic valve 14 and the third electromagnetic valve 16 are kept open for 15 seconds, at the moment, the water flow direction in the pipeline is the water collecting device 2 → the diaphragm pump 4 → the first electromagnetic valve 5 → 100 mu filter element 8 → 1 mu filter element 9 → 0.45 mu filter element 13 → the second electromagnetic valve 14 → the nutrient salt detector 15 → the third electromagnetic valve 16 → the waste liquid tank 19. And after 15 seconds, controlling the second electromagnetic valve 14 and the third electromagnetic valve 16 to be automatically closed, and finishing the pipeline infiltration process.
After the pipeline infiltration is accomplished, carry out the water sample and filter, keep diaphragm pump 4, first solenoid valve 5 to open promptly, open second solenoid valve 14 simultaneously, the water sample flows into nutritive salt detector 15 and carries out the real-time on-line analysis of water sample to pass back the analysis result for ground control cabinet through PLC programmable controller, after 10 seconds, nutritive salt detector 15 stores up, closes second solenoid valve 14, other water samples are because pipeline overvoltage protection effect discharges through relief valve 18 this moment.
After the water sample analysis is finished, the residual water sample in the nutrient salt detector 15 needs to be discharged so as to facilitate the storage and detection of the water sample at the next depth. And (3) closing the diaphragm pump 4 and the first electromagnetic valve 5, opening the second electromagnetic valve 14 and the third electromagnetic valve 16, discharging the water sample in the nutrient salt detector 15 to the waste liquid pool 19, and closing the second electromagnetic valve 14 and the third electromagnetic valve 16 after 20 seconds to finish the deep filtration of the water sample.
In this embodiment, the pipeline backwashing system is shown in fig. 3, and the pipeline backwashing process is as follows:
after the deep filtration of the water sample is completed, pipeline backwashing needs to be carried out on the filtration pipeline, so that the residual water sample is prevented from polluting the detection of the next deep water sampling water sample. The ozone generator 1 is directly connected with a water tap to ensure sufficient backwashing water sample.
The operator of the control console starts the pipeline back flushing system, namely the ozone generator 1 and the washing water main pipe electromagnetic valve 3. First, the backwashing of the third stage filtration is performed, that is, the 0.45 μ filter element 13 is washed, at this time, the sixth electromagnetic valve 12 and the ninth electromagnetic valve 17 are opened, and at this time, the direction of the water flow in the pipe is the ozone generator 1 → the washing water header pipe electromagnetic valve 3 → the sixth electromagnetic valve 12 → 0.45 μ filter element 13 → the ninth electromagnetic valve 17 → the waste liquid tank 19.
After 10 seconds, the sixth electromagnetic valve 12 and the ninth electromagnetic valve 17 are closed, the fifth electromagnetic valve 11 and the eighth electromagnetic valve 7 are opened, and the backwashing for the second stage filtration is performed, that is, the 1 mu filter element 9 is cleaned, at this time, the water flow direction in the pipeline is ozone generator 1 → cleaning water header electromagnetic valve 3 → fifth electromagnetic valve 11 → 1 mu filter element 9 → eighth electromagnetic valve 7 → waste liquid tank 19.
After 10 seconds, the second stage filtration backwashing is finished, the fifth electromagnetic valve 11 and the eighth electromagnetic valve 7 are closed, the fourth electromagnetic valve 10 and the seventh electromagnetic valve 6 are opened, and the backwashing of the first stage filtration, namely the cleaning of the 100 mu filter element 8, is carried out, at this time, the water flow direction in the pipeline is ozone generator 1 → cleaning water header pipe electromagnetic valve 3 → fourth electromagnetic valve 10 → 100 mu filter element 8 → seventh electromagnetic valve 6 → waste liquid tank 19.
After the first round of backwashing is finished, 4 rounds of backwashing are carried out in sequence. I.e. a total of 5 backflushing operations are required to ensure that the inner wall of the pipeline is free from deposits. After 5 times of backwashing, the ozone generator 1 is closed, and the electromagnetic valve 3 of the washing water main pipe is closed. In this embodiment, the three-stage filter element filter is sequentially subjected to backwashing, wherein the backwashing time of the 0.45 μ filter element is 10 seconds, then the backwashing of the 1 μ filter element is performed, and after 10 seconds, the backwashing of the 100 μ filter element is performed, and the total cleaning time needs to reach 5 times to ensure that no attachment is attached to the inner wall of the pipeline, thereby avoiding blockage.
The automatic seawater sample filtering and backwashing device mainly comprises a water sampling device 2, a diaphragm pump 4, an ozone generator 1, a 100 mu filter element 8, a 1 mu filter element 9, a 0.45 mu filter element 13, a safety valve 18, 10 electromagnetic valves, a nutrient salt detector 15, a plurality of hard pipes, a plurality of pipe joints and one PLC (programmable logic controller). The device can directly perform water sample on-line analysis on water samples distributed to all detection instruments, transmits analysis data back to the ground control console through the PLC, can realize automatic filtration, automatic detection and analysis of seawater samples, performs backwashing on the filtered water distribution pipeline and the detection instruments, basically realizes the automation of water sample filtration and backwashing of the water distribution pipeline, and is simple in structure, simple to operate, and accurate and reliable in test and analysis results. The device of the embodiment can reduce the operation risk of offshore water quality sampling workers, reduce the working strength of the offshore water quality sampling workers, and has important application value for gradually improving the automation level of sea area monitoring around the island.
Example two:
this embodiment is substantially the same as the first embodiment, and is characterized in that:
in this embodiment, as shown in fig. 4, an auxiliary diaphragm pump in signal connection with the main control system is further provided in the seawater automatic filtration system, the auxiliary diaphragm pump is used as the second water pump, the pipeline connection mode of the auxiliary diaphragm pump is completely the same as that of the diaphragm pump 4, so that the water outlet of the water sampling device 2 is communicated with the suction inlet of the auxiliary diaphragm pump, and the seawater sample can be sucked and conveyed by the water sampling device 2 through the auxiliary diaphragm pump. Two water pumps are installed in the water distribution pipeline of this implementation, open the second water pump when water is not enough supplied to a water pump, for the stable work of each detecting system of water sample provides the guarantee, form effectual redundant mechanism, avoid the water distribution pipeline to break down because of the water sample shortage.
Example three:
this embodiment is substantially the same as the previous embodiment, and is characterized in that:
in this embodiment, in the pipeline backwashing system, the nutrient salt detection pipeline formed by connecting the second electromagnetic valve 14, the nutrient salt detector 15 and the third electromagnetic valve 16 in series can be cleaned, that is, by controlling the corresponding electromagnetic valves, the nutrient salt detector 15 is washed by the clean water provided by the water outlet pipe of the ozone generator 1, and the attachments on the inner wall of the nutrient salt detection pipeline and the inner wall of the water passing cavity of the nutrient salt detector 15 are washed to the waste liquid tank 19. When the nutrient salt detection pipeline is cleaned, the ozone generator 1, the washing water main pipe electromagnetic valve 3, the sixth electromagnetic valve 12, the second electromagnetic valve 14 and the third electromagnetic valve 16 are opened, and at the moment, the water flow direction in the pipeline is the ozone generator 1 → the washing water main pipe electromagnetic valve 3 → the sixth electromagnetic valve 12 → the second electromagnetic valve 14 → the nutrient salt detector 15 → the third electromagnetic valve 16 → the waste liquid tank 19, so that the nutrient salt detection pipeline is effectively cleaned, and the precision of next detection is ensured.
The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes and modifications can be made according to the purpose of the invention, and any changes, modifications, substitutions, combinations or simplifications made according to the spirit and principle of the technical solution of the present invention shall be equivalent substitution ways, so long as the purpose of the present invention is met, and the present invention shall fall within the protection scope of the present invention as long as the technical principle and the inventive concept of the automatic seawater sample filtering and back flushing device of the present invention are not departed.
Claims (9)
1. The utility model provides a sea water sample automatic filtration and back flush system which characterized in that mainly includes sea water automatic filtration system and pipeline back flush system two parts, is controlled by main control system respectively, specifically as follows:
the seawater automatic filtration system comprises a water collection device (2), a diaphragm pump (4), a graded filtration device, a nutrient salt detector (15), a waste liquid pool (19) and a series of electromagnetic valves, wherein a water outlet of the water collection device (2) is communicated with a suction inlet of the diaphragm pump (4), a seawater sample can be sucked and conveyed by the diaphragm pump (4) through the water collection device (2), a water sample filtration and detection pipeline is arranged between the water outlet of the diaphragm pump (4) and the waste liquid pool (19), the water sample filtration and detection pipeline is formed by serially connecting a first electromagnetic valve (5), the graded filtration device, a second electromagnetic valve (14), the nutrient salt detector (15) and a third electromagnetic valve (16) in sequence, the first electromagnetic valve (5) is arranged between the diaphragm pump (4) and the graded filtration device, and the data output end of the nutrient salt detector (15) is in signal connection with an information receiving end of the system, the water sampling device (2), the diaphragm pump (4) and the signal receiving end of each electromagnetic valve are respectively in signal connection with the instruction information output end of the main control system, filtered water after being filtered by the graded filtering device meets the requirement of a sample for detection of a nutrient salt detector (15), and then enters the nutrient salt detector (15) for detection and analysis of nutrient salt in a water sample, so that automatic filtration and automatic detection of the water sample are completed;
the pipeline backwashing system mainly comprises an ozone generator (1), a grading filter device, a front end electromagnetic valve group and a rear end electromagnetic valve group which are in signal connection with the main control system, wherein the ozone generator (1) is used for preparing ozone gas and sterilizing and disinfecting water in the pipeline backwashing system, a water inlet of the ozone generator (1) is directly connected with a water tap, a cleaning water delivery pipe processed by the ozone generator (1) is respectively communicated with water inlet pipes of all stages of filter units of the grading filter device, the front end electromagnetic valve group and the rear end electromagnetic valve group are respectively arranged at the water inlet and outlet ends of the grading filter device, cleaning water is respectively delivered to all stages of filter units of the grading filter device by controlling the front end electronic valve group and the rear end electromagnetic valve group, and the pipeline backwashing system utilizes high-pressure water flow to wash attachments on the inner wall of each water distribution pipeline to the waste liquid pool (19) after water sample is automatically detected, flushing a water passing chamber of the graded filtering device;
the seawater automatic filtering system is also provided with an auxiliary diaphragm pump in signal connection with the main control system, the auxiliary diaphragm pump is used as a second water pump, the pipeline connection mode of the auxiliary diaphragm pump is completely the same as that of the diaphragm pump (4), a water outlet of the water sampling device (2) is communicated with a suction inlet of the auxiliary diaphragm pump, and a seawater sample can be sucked and conveyed through the water sampling device (2) by utilizing the auxiliary diaphragm pump.
2. The automatic seawater sample filtering and backwashing device of claim 1, wherein: in the automatic seawater filtering system, different filter elements with the filter element porosity range of 0.45-100 mu are adopted by each stage of filtering unit of the stage filtering device.
3. The automatic seawater sample filtering and backwashing device of claim 2, wherein: the filtration units at all levels of the graded filtration device respectively adopt a 100 mu filter element (8), a 1 mu filter element (9) and a 0.45 mu filter element (13), the filtration units at all levels form a three-level filtration device by series connection, so that a water sample flows from high to low according to the filtration porosity, and sequentially passes through the 100 mu filter element (8), the 1 mu filter element (9) and the 0.45 mu filter element (13), and finally, the filtered water flowing out of the 0.45 mu filter element (13) meets the requirement of a sample for detection of a nutrient salt detector (15), and then enters a subsequent detection process.
4. The automatic seawater sample filtering and backwashing device of claim 3, wherein: in the pipeline back flushing system, a front end electromagnetic valve group comprises a fourth electromagnetic valve (10), a fifth electromagnetic valve (11) and a sixth electromagnetic valve (12), a rear end electromagnetic valve group comprises a seventh electromagnetic valve (6), an eighth electromagnetic valve (7) and a ninth electromagnetic valve (17), the fourth electromagnetic valve (10) and the seventh electromagnetic valve (6) are respectively arranged at two ends of a water inlet and a water outlet of a 100 mu filter element (8), a 100 mu filter element flushing unit pipeline is formed between a water outlet pipe of the ozone generator (1) and a waste liquid pool (19), cleaning water entering the 100 mu filter element flushing pipeline flushes the 100 mu filter element (8), the fifth electromagnetic valve (11) and the eighth electromagnetic valve (7) are respectively arranged at two ends of a water inlet and a water outlet of a 1 mu filter element (9), and a 1 mu filter element flushing unit pipeline is formed between the water outlet pipe of the ozone generator (1) and the waste liquid pool (19), the cleaning water entering the 1 mu filter element flushing pipeline flushes the 1 mu filter element (9), the sixth electromagnetic valve (12) and the ninth electromagnetic valve (17) are respectively arranged at two ends of a water inlet and a water outlet of the 0.45 mu filter element (13), a 0.45 mu filter element flushing unit pipeline is formed between a water outlet pipe of the ozone generator (1) and the waste liquid pool (19), and the cleaning water entering the 0.45 mu filter element flushing pipeline flushes the 0.45 mu filter element (13); the cleaning water is respectively conveyed to each stage of filtering units of the graded filtering device by controlling the front-end electronic valve group and the rear-end electromagnetic valve group, each stage of filtering units of the graded filtering device is respectively washed, and the cleaning water provided by the ozone generator (1) is controlled by controlling the front-end electromagnetic valve group and the rear-end electromagnetic valve group.
5. The automatic seawater sample filtering and backwashing device of any one of claims 1 to 4, wherein: and an overpressure protection pipeline is arranged in the seawater automatic filtering system, the overpressure protection pipeline is connected with the water sample filtering and detecting pipeline in parallel, and a safety valve (18) is arranged on the overpressure protection pipeline, so that the safety valve (18) is also arranged between a water outlet pipe of a water outlet of the diaphragm pump (4) and a waste liquid pool (19) to form an auxiliary safety control pipeline of the seawater automatic filtering system.
6. The automatic seawater sample filtering and backwashing device of any one of claims 1 to 4, wherein: in the pipeline backwashing system, a nutrient salt detection pipeline formed by connecting the second electromagnetic valve (14), the nutrient salt detector (15) and the third electromagnetic valve (16) in series can be cleaned, namely, the corresponding electromagnetic valves are controlled, so that the nutrient salt detector (15) is washed by the clean water provided by the water outlet pipe of the ozone generator (1), and the attachments on the inner wall of the nutrient salt detection pipeline and the inner wall of the water passing cavity of the nutrient salt detector (15) are flushed to the waste liquid pool (19).
7. The automatic seawater sample filtering and backwashing device of any one of claims 1 to 4, wherein: in the seawater automatic filtration system, a washing water main pipe electromagnetic valve (3) in signal connection with the main control system is further arranged on a water outlet main pipe of the ozone generator (1), and the ozone generator (1) is controlled by controlling the washing water main pipe electromagnetic valve (3) and the front end electromagnetic valve group to supply washing water.
8. The automatic seawater sample filtering and backwashing device of any one of claims 1 to 4, wherein: the main control system adopts a PLC programmable controller and can also transmit analysis data back to the ground console.
9. The automatic seawater sample filtering and backwashing device of any one of claims 1 to 4, wherein: in the seawater automatic filtration system, the water sampling device (2) adopts a winch, the diaphragm pump (4) is combined and utilized to absorb and lift a seawater sample from the water surface, and then the seawater sample is conveyed to a back process through the diaphragm pump (4).
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| CN108254367B (en) * | 2017-12-21 | 2024-04-05 | 国家海洋局第二海洋研究所 | Automatic detection and early warning device and method for ship-borne or shore-based water nutrient salt |
| CN108414477A (en) * | 2018-01-12 | 2018-08-17 | 山东省科学院海洋仪器仪表研究所 | Seawater chlorophyll a, phycocyanin and phycoerythrin parameter measuring apparatus and method |
| CN109445316A (en) * | 2018-09-07 | 2019-03-08 | 上海大学 | Automatic seawater water quality monitoring and water sample distribution system |
| CN110057767B (en) * | 2019-05-15 | 2024-07-02 | 山东省科学院海洋仪器仪表研究所 | Buoy-based hyperspectral water body absorption attenuation measurement device and method |
| CN113075377B (en) * | 2021-04-01 | 2023-04-14 | 山东博厚数据科技有限公司 | Intelligent water sample collection system and method for sewage orthophosphate meter |
| CN115290771A (en) * | 2022-07-06 | 2022-11-04 | 上海瑞暨新材料科技有限公司 | Filter device |
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