CN107525694A - A kind of water suspension sampling apparatus and the method for sampling - Google Patents

Abstract

The invention discloses a seawater suspended substance sampling device and a sampling method. The device comprises: a submersible pump (10) that can be placed in seawater, a filter (20) that can be fixed on the ship's side, and is used to connect the submersible pump ( 10) and the connecting pipeline (30) of the filter (20); the filter (20) includes a filter bag (28) that separates seawater and suspended matter, and the suspended matter remains in the filter bag during sampling In (28), the aperture of filter bag (28) is set according to experimental requirements. The invention can continuously separate seawater and suspended matter, collect a large number of suspended matter samples in a short time, realize rapid collection of suspended matter samples, optimize the sampling method, improve sampling efficiency, save manpower and material resources, and due to the pore size of the filter bag It is set according to the experimental requirements, so the present invention can freely select the minimum particle size of the collected seawater suspended matter, greatly increases the sampling speed of the seawater suspended matter, and can ensure the representativeness of the sample at the same time.

Description

A seawater suspended matter sampling device and sampling method

technical field

The invention relates to the field of nuclear power, in particular to a seawater suspended matter sampling device and a sampling method.

Background technique

The Kd factor is a key parameter in the environmental impact assessment of nuclear power plants, and it is of great significance for evaluating the radiation dose of radionuclides in the liquid effluent of nuclear power plants to the public. When measuring the Kd factor in seawater, in order to determine the experimental conditions, it is necessary to measure the properties of the suspended matter sample, and the property measurement requires more suspended matter samples (5g-10g dry sample). When the existing method collects suspended solids in seawater, a sampling bottle is used to collect seawater samples to the laboratory, and a suction filtration device is used to filter the seawater samples in the laboratory, and the suspended solids on the filter membrane are collected as suspended solid samples.

Although the existing method provides a method for collecting seawater suspended matter, it still has the following disadvantages: the sample size of the suspended matter collected by a single filtration is small (5mg～10mg), and the filtration time is long (20min-30min); The workload of suspended matter samples (5g~10g) required for the measurement of sample properties is huge; after a large number of seawater samples are collected at the same time, the suspended matter in the seawater samples that cannot be filtered in time is easy to deposit in the sampling bottle, which affects the collection of suspended matter; The sample is attached to the filter membrane, which may damage the filter membrane when it is removed, resulting in sample contamination.

Contents of the invention

The technical problem to be solved by the present invention is to provide a seawater suspended matter sampling device and a sampling method for the above-mentioned defects of the prior art.

The technical solution adopted by the present invention to solve the technical problem is to construct a seawater suspended matter sampling device, including: a submersible pump that can be placed in seawater, a filter that can be fixed on the ship's side, and is used to connect the submersible pump and The connecting pipeline of the filter; the filter includes a filter bag that separates seawater and suspended matter, and the suspended matter remains in the filter bag during sampling, and the aperture of the filter bag is set according to experimental requirements.

In the seawater suspended matter sampling device according to the present invention, the filter includes a cylinder, a top cover detachably connected to the cylinder for sealing the cylinder, and a filter near the upper end of the cylinder. The water inlet of the device, the water outlet of the filter located at the lower end of the cylinder, and the filter bag.

In the seawater suspended solids sampling device according to the present invention, it also includes a filter bag bracket sleeved inside the cylinder and a filter bag fastener for fixing the filter bag to the top opening of the filter bag bracket , when sampling, it is necessary to spread the filter bag so that it fits the inner wall of the filter bag holder.

In the seawater suspended matter sampling device according to the present invention, the filter bag support is a grid-shaped cylindrical plastic product.

In the seawater suspended matter sampling device according to the present invention, a pressure gauge is fixed on the top cover, and when the pressure in the pressure gauge exceeds the pressure that the filter bag support can withstand, the power supply of the submersible pump can be turned off , take out the filter bag and collect the remaining suspended matter in the filter bag.

In the seawater suspended matter sampling device according to the present invention, the connecting pipeline is connected to the water inlet of the filter using a flange or a fastener.

In the seawater suspended matter sampling device according to the present invention, the submersible pump includes a pump body, a water inlet of the submersible pump for drawing in seawater, and a water outlet of the submersible pump connected with the connecting pipeline. The rope is hoisted into the sea to a specified depth.

In the seawater suspended matter sampling device according to the present invention, the connecting pipeline is connected to the water outlet of the submersible pump using a flange or a fastener.

In the seawater suspended solids sampling device according to the present invention, the water inlet of the submersible pump is a bell mouth with a diameter gradually increasing, and the water outlet of the submersible pump is a nozzle bent upwards.

The invention also discloses a seawater suspended matter sampling method based on the device, comprising:

Use the sling to hoist the submersible pump into the specified depth of sea water, use the cable to fix the filter on the side of the ship, and keep the filter perpendicular to the sea surface;

Turn on the power of the submersible pump, the sea water enters the filter bag in the filter successively from the submersible pump inlet of the submersible pump, the outlet of the submersible pump of the submersible pump, the connecting pipeline, and the filter inlet of the filter, and then from the filter of the filter The water outlet is filtered out, and the suspended matter in the seawater is separated from the seawater through the filter bag and stored in the filter bag;

When the pressure in the pressure gauge above the filter top cover exceeds the pressure that the filter bag bracket supporting the filter bag in the filter can bear, turn off the power supply of the submersible pump, take out the filter bag and collect it in the filter bag. Residual suspended solids.

Implementing the seawater suspended matter sampling device and sampling method of the present invention has the following beneficial effects: the submersible pump and the filter of the present invention are put into use at the same time, the submersible pump can be used to continuously collect seawater and transport it to the filter, and the seawater and suspended matter can be continuously separated. Collect a large number of suspended solids samples in a short time, realize rapid collection of suspended solids samples, optimize the sampling method, improve the sampling efficiency, save manpower and material resources, and compared with the original sampling method, because the pore size of the filter bag according to the experiment Therefore, the present invention can freely select the minimum particle size of the collected seawater suspended matter, greatly increases the sampling speed of the seawater suspended matter, and can ensure the representativeness of the sample at the same time.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings on the premise of not paying creative work:

Fig. 1 is a schematic structural view of a preferred embodiment of the seawater suspended matter sampling device of the present invention.

detailed description

In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Typical embodiments of the invention are shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be thorough and complete.

It should be noted that when an element is referred to as "fixing" another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "upper", "vertical" and similar expressions are used herein for the purpose of description only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

The general idea of the present invention is to construct a seawater suspended matter sampling device, including: a submersible pump that can be placed in seawater, a filter that can be fixed on the ship's side, a connection for connecting the submersible pump and the filter pipeline; the filter includes a filter bag for separating seawater and suspended matter, and the suspended matter remains in the filter bag during sampling, and the pore size of the filter bag is set according to experimental requirements.

Based on the device, the present invention can use the submersible pump to continuously collect seawater and transport it to the filter, continuously separate seawater and suspended matter, collect a large number of suspended matter samples in a short time, realize rapid collection of suspended matter samples, optimize the sampling method, and improve It improves the efficiency of sampling, saves manpower and material resources, and the pore size of the filter bag is set according to the experimental requirements, so the minimum particle size of the collected seawater suspended matter can be freely selected, which greatly increases the sampling speed of seawater suspended matter, and at the same time ensures the sample. representative.

In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present application. To illustrate, rather than limit, the technical solutions of the present application, the embodiments of the present invention and the technical features in the embodiments can be combined without conflict.

With reference to Fig. 1, the sampling device in the preferred embodiment includes: a submersible pump 10 that can be placed in seawater, a filter 20 that can be fixed on the ship's side, a filter for connecting the submersible pump 10 and the filter 20 Connect the line 30.

Wherein, the submersible pump 10 includes a pump body 11, a submersible pump water inlet 12 for sucking seawater, and a submersible pump water outlet 13 connected with the connecting pipeline 30. The top of the pump body 11 has two lifting lugs, and the sling 14 can lift the whole submersible pump 10 into the sea to a specified depth after the two lifting lugs are worn, and the specific depth is controlled by the sling 14.

Specifically, the water inlet 12 of the submersible pump is arranged at the bottom of the pump body 11, which is a bell mouth with a diameter gradually increasing. The water outlet 13 of the submersible pump is located on the side wall of the bottom of the pump body 11 and close to the bottom of the pump body 11. The water outlet 13 of the submersible pump is specifically an upwardly bent nozzle, and the connecting pipeline 30 is used with the water outlet 13 of the submersible pump. Flange or fastener connection.

Wherein, the filter 20 includes a cylinder body 23 , a top cover 22 , a filter water inlet 24 , a filter water outlet 25 , a filter bag 28 , a pressure gauge 21 , a filter bag holder 26 , and a filter bag fastener 27 .

Specifically, the filter water inlet 24 is arranged on the side wall of the cylinder 23 close to the upper end of the cylinder 23 , and the connecting pipeline 30 is connected to the filter water inlet 24 using flanges or fasteners. The filter water outlet 25 is located at the lower end of the cylinder body 23. The filter water outlet 25 and the cylinder body 23 can be integrally formed or fixed by welding. The filter water outlet 25 can also be directly opened at the bottom of the cylinder body 23. hole.

Specifically, the filter bag holder 26 is sleeved inside the cylinder body 23 , and the filter bag fastener 27 is in the shape of a cylinder for locking the filter bag 28 at the top opening of the filter bag holder 26 . The aperture of the filter bag 28 is set according to the experimental requirements. During sampling, the filter bag 28 needs to be spread out so that it fits with the inner wall of the filter bag holder 26 .

Preferably, the filter bag holder 26 is a grid-shaped cylindrical plastic product.

Specifically, the top cover 22 is detachably connected to the cylinder body 23 and is used to cover the cylinder body 23 . For example, the top cover 22 is tightly connected to the cylinder body 23 by screwing. A pressure gauge 21 is fixed on the top cover 22. When the pressure in the pressure gauge 21 exceeds the pressure that the filter bag support 26 can withstand, the power supply of the submersible pump 10 can be turned off, and the filter bag 28 can be taken out. The remaining suspended matter in the filter bag 28 is collected.

The working principle of this embodiment is as follows:

Firstly, the filter bag 28 is clamped at the top opening of the filter bag holder 26 by the filter bag fastener 27 , and the filter bag 28 is spread to fit the inner wall of the filter bag holder 26 . The top cover 22 is connected with the cylindrical body and tightened to complete the assembly of the bag filter 20 . One end of the connection pipeline 30 is connected to the water outlet 13 of the submersible pump by a flange or a fastener, and the other end is connected to the water inlet 24 of the filter by a flange or a fastener.

Then, use the sling 14 to slowly lift the submersible pump 10 into the seawater, and place it at a specified depth in the seawater. Use cables to fix the bag filter 20 on the ship's side, and keep the water outlet 25 and the cylindrical body 23 perpendicular to the sea surface. Turn on the power of the submersible pump, sea water enters the sampling device from the water inlet 12 of the submersible pump, passes through the water outlet 13 of the submersible pump, the connecting pipeline 30, the water inlet 24 and the filter bag 28, and flows out from the water outlet 25, and the suspended matter in the sea water passes through the filter bag 28 It is separated from seawater and stored in the filter bag 28. When the pressure in the pressure gauge 21 exceeds the pressure (plastic support, 0.5MPa) that the filter bag support 26 can bear, the submersible pump power supply is turned off, the filter bag 28 is taken out, and the suspended matter remaining in the filter bag is collected.

Based on the same inventive concept, the present invention also discloses a seawater suspended matter sampling method based on the device, the method comprising:

S100, use the sling 14 to hoist the submersible pump 10 into the sea water to a specified depth, use the cable to fix the filter 20 on the side of the ship, and keep the filter 20 perpendicular to the sea surface;

S200, turn on the power supply of the submersible pump 10, seawater enters the filter 20 from the submersible pump water inlet 12 of the submersible pump 10, the submersible pump water outlet 13 of the submersible pump 10, the connecting pipeline 30, and the filter water inlet 24 of the filter 20 The filter bag 28 is filtered out from the filter outlet 25 of the filter 20, and the suspended solids in the seawater are separated from the seawater by the filter bag 28 and stored in the filter bag 28;

S300. When the pressure in the pressure gauge 21 above the top cover 22 of the filter 20 exceeds the pressure that the filter bag holder 26 supporting the filter bag 28 in the filter 20 can bear, turn off the power of the submersible pump 10 and take out the Filter bag 28 and collect the suspended matter remaining in the filter bag 28.

In summary, the implementation of the seawater suspended matter sampling device and sampling method of the present invention has the following beneficial effects: the submersible pump and filter of the present invention are put into use at the same time, and the submersible pump can be used to continuously collect seawater and transport it to the filter for sustainable separation Seawater and suspended matter, collect a large number of suspended matter samples in a short time, realize rapid collection of suspended matter samples, optimize the sampling method, improve the sampling efficiency, save manpower and material resources, and compared with the original sampling method, due to the filter The pore size of the bag is set according to the experimental requirements, so the present invention can freely select the minimum particle size of the collected seawater suspended matter, greatly increases the sampling speed of the seawater suspended matter, and can ensure the representativeness of the sample at the same time.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, many forms can also be made without departing from the gist of the present invention and the protection scope of the claims, and these all belong to the protection of the present invention.

Claims (10)

1. A kind of 1. water suspension sampling apparatus, it is characterised in that including：The immersible pump (10) that can be placed in seawater, it can fix In the filter (20) on ship side, the connecting line (30) for connecting the immersible pump (10) and the filter (20)；Institute Stating filter (20) includes a filter bag (28) for separating seawater and suspension, and suspension retains in the filter bag during sampling (28) in, the aperture of filter bag (28) is set according to requirement of experiment.
2. 2. water suspension sampling apparatus according to claim 1, it is characterised in that the filter (20) includes cylinder (23) top cover (22) for being used to cover the cylinder (23), the close cylinder, being detachably connected with the cylinder (23) (23) the filter water inlet (24) of upper end, filter delivery port (25), the filter bag positioned at the cylinder (23) lower end (28)。
3. 3. water suspension sampling apparatus according to claim 2, it is characterised in that also include being placed on the cylinder (23) Internal filter bag support (26) and the filter bag for the filter bag (28) to be fixed on to filter bag support (26) top open part Fastener (27), need to sprawl the filter bag (28) during sampling makes it be bonded with filter bag support (26) inwall.
4. 4. water suspension sampling apparatus according to claim 3, it is characterised in that the filter bag support (26) is in net The tubular plastic part of trellis.
5. 5. water suspension sampling apparatus according to claim 2, it is characterised in that be fixed with pressure on the top cover (22) Power table (21), when pressure exceedes the pressure that the filter bag support (26) can bear in the pressure gauge (21), institute can be closed Immersible pump (10) power supply is stated, the filter bag (28) is taken out and collects the suspension of residual in the filter bag (28).
6. 6. water suspension sampling apparatus according to claim 2, it is characterised in that the connecting line (30) with it is described Filter water inlet (24) is connected using flange or fastener.
7. 7. water suspension sampling apparatus according to claim 1, it is characterised in that the immersible pump (10) includes the pump housing (11) the immersible pump delivery port (13) for, be pumped into the immersible pump water inlet (12) of seawater, being connected with the connecting line (30), it is described The pump housing (11) can hang in marine designated depth by hoist cable (14).
8. 8. water suspension sampling apparatus according to claim 7, it is characterised in that the connecting line (30) with it is described Immersible pump delivery port (13) is connected using flange or fastener.
9. 9. water suspension sampling apparatus according to claim 7, it is characterised in that the immersible pump water inlet (12) is The horn mouth that bore gradually increases, the mouth of pipe that the immersible pump delivery port (13) is folded upward at.
10. A kind of 10. water suspension method of sampling based on any one of claim 1-9 described device, it is characterised in that including：

    Immersible pump (10) is hung in into seawater designated depth using hoist cable (14), filter (20) is fixed on ship side using hawser On, and filter (20) remains perpendicular to the state on sea；

    Open immersible pump (10) power supply, seawater successively from the immersible pump water inlet (12) of immersible pump (10), immersible pump (10) it is latent The filter that pump outlet (13), connecting line (30), the filter water inlet (24) of filter (20) enter in filter (20) Bag (28), then filtered out from the filter delivery port (25) of filter (20), the suspension in seawater passes through filter bag (28) and seawater Separate and be stored in filter bag (28)；

    Pressure exceedes filter bag described in filter (20) inner support in pressure gauge (21) above filter (20) top cover (22) (28) during the pressure that filter bag support (26) can bear, the immersible pump (10) power supply is closed, takes out the filter bag (28) simultaneously Collect the suspension of residual in the filter bag (28).