CN206818499U - A kind of nutrients in sea water monitors filtration system on-line - Google Patents

Abstract

The utility model discloses an on-line monitoring and filtering system for seawater nutrient salt, which belongs to the field of environmental monitoring devices. The system includes a sand filter head, a peristaltic pump, a solenoid valve with one inlet and multiple outlets, a filter and a water collection device; the peristaltic pump and the solenoid valve with one inlet and multiple outlets are installed in a sealed waterproof device; the water inlet of the peristaltic pump passes through the water pipe Connected to the outside of the sealed waterproof device, and a sand filter head is connected to the end of the water pipe; the water outlet of the peristaltic pump is connected to the water inlet of the one-inlet and multiple-outlet solenoid valve through the water pipe, and there are at least two water outlets in the one-inlet and multiple-outlet solenoid valve It is connected to the outside of the sealed waterproof device through a water pipe, and one of them is used for emptying, and the other is filtered through a filter and connected to the water inlet of the water collection device. The utility model has a simple system structure, uses a channel in the multi-way electromagnetic valve to discharge the air in the entire system pipeline, and discharges the residual water sample in the system during the last sampling, ensuring the representativeness of the water sample.

Description

A seawater nutrient salt online monitoring and filtering system

technical field

The utility model belongs to the field of environmental monitoring equipment, in particular to an on-line monitoring and filtering system for seawater nutrient salts.

Background technique

In recent years, with the development and utilization of my country's marine resources, marine-related industries have flourished. At the same time, the marine environmental system has also been "invaded" by various aspects, which directly leads to the imbalance of marine ecology. Seawater pollution has caused a series of problems such as the setback of sea fisheries and the deterioration of seafood quality. In this context, my country's seawater quality automatic monitoring system technology has been valued and developed rapidly. Nutrients in seawater are important indicators for online monitoring of seawater quality. The measurement methods used by nutrient salt quality monitoring instruments are generally spectrophotometry or fluorescence method, and the turbidity of seawater has a great influence on these measurement methods, so the water samples should be filtered and pretreated according to the relevant standards before measurement.

At present, the filter systems of nutrient salt instrument manufacturers are relatively simple, with only a 25μm filter screen, which cannot meet the requirements at all, and the turbidity cannot be removed at all; the filter system of some instrument manufacturers is 0.1μm. The filter element, whose pore size has reached the category of ultrafiltration, will partially intercept nutrients and affect the measurement results. Moreover, the filtering area of this filter element is small, which is easy to cause clogging or damage. Therefore, the development of reliable and practical nutrient salt online monitoring and filtration system is conducive to strengthening the ability of water quality monitoring in my country, improving the technical level of monitoring equipment and doing a good job in water quality monitoring and forecasting.

Utility model content

The purpose of this utility model is to overcome the above-mentioned deficiencies, and to provide a nutrient salt on-line monitoring and filtering system, which can be installed at the front end of the nutrient salt monitoring instrument in the ecological buoy system or shore base station system, and prepare water samples for the measurement of the instrument Pretreatment, and use the remaining water samples to backwash the own system to prevent the filter membrane from clogging.

The technical scheme that realizes the utility model purpose is:

Seawater nutrient salt online monitoring and filtration system, the system includes a sand filter head, a peristaltic pump, a solenoid valve with one inlet and multiple outlets, a filter and a water collection device; the peristaltic pump and the solenoid valve with one inlet and multiple outlets are installed in a sealed waterproof device ;The water inlet of the peristaltic pump is connected to the outside of the sealed waterproof device through a water pipe, and a sand filter head is connected to the end of the water pipe; At least two water outlets in the solenoid valve are connected to the outside of the sealed waterproof device through water pipes, and one of them is used for emptying, and the other is filtered by a filter and then connected to the water inlet of the water collection device.

Preferably, the one-inlet and multiple-outlet solenoid valve is a one-inlet, two-outlet, and three-way solenoid valve. One input and two outputs can meet the basic needs of use, of course, more inputs and more outputs are also possible, the specific needs depend on the function of use.

Preferably, the filter is a 0.45 μm filter. The 0.45μm filter has a large internal filtration area, which can filter more water samples in a short period of time, and the excess water samples after filtration can be used to backwash the filter membrane to prevent the filter membrane from clogging.

Preferably, the 0.45 μm filter is a capsule filter with a pleated filter membrane, the filter housing is made of polypropylene, and the filter membrane is made of polypropylene fiber with a pore size of 0.45 μm. The pore size and material of the filter membrane meet the fourth part of the Ocean Monitoring Specification: Seawater Analysis (GB 17378.4-2007), which provides a guarantee for the analysis and measurement of the instrument; and the capsule filter is easy to replace.

Further, the water collecting device is a 500mL water bag. A water bag of this volume can meet the water demand for water quality analysis and backwashing.

As a preference, the pore size of the sand filter head is 25 μm, and its function is to prevent larger particles or other sundries from entering the system pipeline and causing blockage.

Preferably, the peristaltic pump is a reversible peristaltic pump. Forward rotation is used to collect water samples and reverse rotation is used to backwash lines and filters.

Preferably, the one-inlet and multiple-outlet solenoid valve switches the water outlet channel according to the power supply of the solenoid valve coil, so as to realize the switching of the draining and sampling functions.

The system structure of the utility model is simple, and the air in the pipeline of the whole system is exhausted by using a channel in the multi-way electromagnetic valve, and the water sample remaining in the system during the last sampling is discharged, so that the utilization of the multi-way electromagnetic valve can be ensured. The sample will not be mixed with the previous sample when sampling in another channel, which ensures the representativeness of the water sample.

Description of drawings

Fig. 1 is the overall structural representation of the utility model.

In the figure: sand filter head 1, peristaltic pump 2, one-in, two-out three-way solenoid valve 3, filter 4 and water bag 5.

detailed description

The utility model will be further elaborated and illustrated below in conjunction with the accompanying drawings and specific embodiments. The technical features of each embodiment in the utility model can be combined correspondingly on the premise that there is no mutual conflict.

System composition:

As shown in Figure 1, the seawater nutrient salt online monitoring and filtration system mainly includes a peristaltic pump 2, a three-way solenoid valve with one inlet and two outlets 3, a 0.45 μm filter 4, a sand filter head 1, a 500mL water bag 5 and a sealed waterproof box. The peristaltic pump 2 and the one-in, two-out three-way solenoid valve 3 are installed inside the sealed waterproof box (not shown in the figure). The sealed waterproof box provides a sealed environment for the peristaltic pump and solenoid valve, preventing damage to the peristaltic pump motor and solenoid valve coil due to contact with moisture. The water inlet of the peristaltic pump 2 is connected to the outside of the sealed waterproof box through a water pipe, and a sand filter head 1 is connected to the top of the water inlet pipe. The pore size of the sand filter head is 25 μm, and its function is to prevent larger particles or other debris from entering the system pipeline and causing blockage. The water outlet of the peristaltic pump 2 is connected with the water inlet of the one-in, two-out three-way solenoid valve 3 through a water pipe, and the two-way water outlets of the one-in two-out three-way solenoid valve 3 are connected to the outside of the sealed waterproof box with a water pipe. The first channel of the water outlet is empty, the second channel of the water outlet is connected to the 0.45μm filter 4, and the outlet of the 0.45μm filter 4 is connected to the 500mL water bag 5. The 500mL water bag is the filtered sample storage water bag, and the monitoring instrument is directly from the water bag Water outlet sampling analysis.

The peristaltic pump 2 can realize forward and reverse rotation according to different ways of power supply, and its power supply voltage is DC 12V. The peristaltic pump 2 has good sealing performance, can run dry, and the fluid can flow backward.

In this embodiment, the power supply voltage of the one-inlet two-outlet three-way solenoid valve 3 is DC 12V. When the solenoid valve coil is not powered, the first water outlet port is closed, and the second water outlet port is opened; when the solenoid valve coil is powered on, the first water outlet port is opened, and the second water outlet port is closed. The 0.45μm filter is a capsule filter with a pleated filter membrane and a large filtration surface area. The exterior is made of polypropylene material, free of adhesives and other chemical substances, to ensure that the water sample is not polluted. The material of the filter membrane is polypropylene fiber with a pore size of 0.45 μm. The filter material and its pore size meet the requirements for nutrient filtration pretreatment in the "Marine Monitoring Specification" Part IV: Seawater Analysis (GB17378.4-2007).

The above system works as follows:

When the whole system starts to run: the peristaltic pump 2 is powered on for 3 minutes for the first time, the pump rotates forward, and the system starts to collect water samples. At the same time, the solenoid valve is powered on for 30 seconds, the first channel of the water outlet is opened, the second channel is closed, and the inside of the pipeline is discharged Then the solenoid valve is powered off, the first channel of the water outlet is closed, the second channel is opened, and the water sample is filtered through the 0.45μm filter 4 and sent to the water bag 5, and the water bag 5 is injected for 2.5 minutes Afterwards, the peristaltic pump 2 is powered off. The samples in the water bag 5 are used for measurement by the monitoring instrument; after the measurement of the instrument, the peristaltic pump 2 is reversely energized for 2 minutes to make it reverse, and the remaining water samples in the water bag 5 are drained, and the 0.45 μm filter 4 is also drained. Played the role of backwash.

The above-mentioned embodiment is only a preferred solution of the present utility model, but it is not intended to limit the present utility model. Various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention. For example, the one-inlet two-outlet three-way solenoid valve can be equipped with more inlets and outlets according to actual needs, and the filter can use membranes of different pore sizes or materials according to the standard method for the actual analysis of elements, and the 500mL water bag can also be replaced For other water collection devices (such as HDPE bottles, etc.). Of course, the above-mentioned system can not only be applied before the nutrient salt online monitoring device, but also can be used as a pre-treatment system for other sampling devices. Therefore, all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the protection scope of the present utility model.

Claims (8)

1. a kind of nutrients in sea water monitors filtration system on-line, it is characterised in that：The system is entered including sand filtration head, peristaltic pump, one Have more magnetic valve, filter and captation；Described peristaltic pump and one enters to have more magnetic valve in sealed waterproof device； The water inlet of peristaltic pump is connected to outside sealed waterproof device by water pipe, and is connected to sand filtration head in the end of water pipe；Peristaltic pump The water inlet that delivery port enters to have more magnetic valve by water pipe with one is connected, and one, which enters to have more at least two-way delivery port in magnetic valve, passes through Water pipe is connected to outside sealed waterproof device, and is wherein used to be vented all the way, and another way is connected to collection after being filtered by filter The water inlet of water installations.

2. nutrients in sea water according to claim 1 monitors filtration system on-line, it is characterised in that：Described one enters to have more Magnetic valve is one-in-and-two-out three-way magnetic valve.

3. nutrients in sea water according to claim 1 monitors filtration system on-line, it is characterised in that：Described filter is adopted With 0.45 μm of filter.

4. nutrients in sea water according to claim 3 monitors filtration system on-line, it is characterised in that：0.45 μm of described mistake Filter is bag type filter, and using collapsible filter membrane, filter housing uses polypropylene material, and the material of filter membrane is polypropylene fibre Dimension, aperture are 0.45 μm.

5. nutrients in sea water according to claim 3 monitors filtration system on-line, it is characterised in that：Described captation For 500mL water bags.

6. nutrients in sea water according to claim 1 monitors filtration system on-line, it is characterised in that：Described sand filtration head bore Footpath is 25 μm.

7. nutrients in sea water according to claim 1 monitors filtration system on-line, it is characterised in that：Described peristaltic pump is adopted With the reversible peristaltic pump of rotating.

8. nutrients in sea water according to claim 1 monitors filtration system on-line, it is characterised in that：Described one enters to have more According to electromagnetic valve coil power-up condition switching water discharging path inside magnetic valve.