Water quality on-line analysis method and analysis system based on domestic chip

Abstract

The application discloses a water quality online analysis method and system based on a domestic chip, which comprises the following steps: removing slag from sewage solution in a sewage pipe to remove silt and solid bottom sediment deposited at the bottom of the pipe body in a flowing state of the sewage solution; the separated sewage solution continues to flow in the pipe body, and flow disturbance is carried out in the flowing process, so that the upper layer solution and the lower layer solution are fully mixed in the longitudinal section of the pipe body; the mixed sewage solution is periodically sampled, and each sampled sewage solution is detected and analyzed by a detection device, so that the deposited sediment in the sewage pipe is removed first, then the sewage solution is fully mixed, and the mixed solution is sampled in time, the one-sided defect of water quality sampling is avoided, and the representativeness of the water quality sample to be detected is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of water quality detection, and particularly relates to a water quality online analysis method and analysis system based on a domestic chip. BACKGROUND

[0002] When sewage is discharged, it needs to be monitored to prevent sewage pollutants from exceeding the standard, such as COD detection, heavy metal ion detection and the like. At present, real-time monitoring of sewage pipelines is generally achieved by directly sampling and detecting by a sampler. Sewage detection points are generally arranged at sewage generating places and sewage discharging places. Sewage flows for a long distance in a sewage pipeline before being discharged. In the case that sewage flows slowly, the sewage in the sewage pipeline is stratified into upper and lower layers. Some pollutants with high density, silt and particulate matter are in the lower layer of the sewage pipeline, and pollutants with low density, flocculent matter and filamentous matter are in the upper layer of the sewage pipeline. However, the sampling tube of a general online type is fixed in the sewage pipeline. The sampled sewage is not representative to a certain extent, so that the detection of water quality is not very accurate. SUMMARY

[0003] The present application provides a water quality online analysis method based on a domestic chip. The method mixes and disturbs the upper and lower layers of a sewage solution locally by using a disturbance device. The disturbance device enables the upper and lower layers of the liquid to exchange partially. The mixed liquid after the exchange is dispersed and mixed again in the process of continuous flow, so as to improve the representativeness of water quality sampling and improve the detection accuracy.

[0004] Technical scheme: In order to achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0005] The water quality online analysis method based on a domestic chip comprises the following steps:

[0006] S1: removing silt in a sewage solution in a sewage pipeline, removing silt and solid bottom sediment deposited at the bottom of the pipe body in the flowing state of the sewage solution, and maintaining the position distribution state of the water solution in the sewage pipeline in the vertical direction at the same time of the silt removal treatment;

[0007] S2: continuing the flow of the separated sewage solution in the pipe body, disturbing the flow by using a disturbance device in the flow process, mixing the upper and lower layers of the solution in the sampling area in the longitudinal section of the pipe body, and sampling on the path after the mixing of the solution;

[0008] S3: slowing down the flow of the mixed solution, slowing down the flow speed of the solution between the sampling area and the disturbance mixing area, and prolonging the dispersion time of the liquid after the exchange of the upper and lower layers of the liquid;

[0009] S4: periodically sampling the mixed sewage solution, and detecting and analyzing each sampled sewage solution through a detection device.

[0010] Further, when the sewage solution is sampled, the sampling process in a cycle is completed by multiple collections and each small collection, and the sewage solution collected each time is mixed and collected in a sample container.

[0011] Further, in the sampling process in each cycle, the overall time is evenly divided into several sampling times, and the sewage solution is sampled at each sampling time.

[0012] Further, when the sewage in the sewage pipe is intermittent pollution, in the sampling process in each cycle, each time the sewage pipe has water flow through it is a sampling time, and the sewage solution is sampled at each sampling time.

[0013] The analysis system of the water quality online analysis method based on domestic chips is provided with a slag removal device, a turbulence device and a sampling device in sequence in the flow direction of the solution on the sewage pipe, the sampling device is arranged adjacent to one side of the turbulence device, the slag removal device removes the sediment at the bottom of the sewage pipe, and maintains the position distribution state of the water solution in the sewage pipe in the vertical direction at the same time of slag removal treatment; the turbulence device locally mixes and disturbs the upper and lower layers of the sewage solution, and the sampling device intermittently samples the mixed sewage solution.

[0014] Further, the slag removal device comprises a sediment container and a sealing piston, the sediment container is a cylinder structure with an upper and lower through opening, the top opening of the sediment container is communicated with the bottom wall of the sewage pipe, the bottom wall of the sewage pipe is provided with a sediment port corresponding to the sediment container, a lifting mechanism is arranged at a distance below the bottom opening of the sediment container, the sealing piston is slidingly and sealingly arranged in the bottom opening of the sediment container through the lifting mechanism, and the sealing piston blocks or opens the bottom opening of the sediment container through the lifting mechanism.

[0015] Further, the top surface of the sealing piston is a conical structure, the top end of the lifting mechanism is provided with an elastic body, the elastic body is elastically stretched and contracted in the lifting direction, and the sealing piston is connected to the lifting mechanism through the elastic body.

[0016] Further, the flow disturbing device comprises a paddle rotor, a flow disturbing plate and an elastic reset member, the flow disturbing plate comprises a rotating shaft, the rotating shaft is arranged in the radial direction in the sewage pipe, the flow disturbing plate is arranged to reciprocate in a plane intersecting the water flow direction through the rotating shaft, the flow disturbing plate is elastically connected to the sewage pipe through the elastic reset member, the paddle rotor is arranged in the sewage pipe, and the axial direction of the paddle rotor is the same as that of the flow disturbing plate, the paddle rotor is driven by the water flow, and one end of the flow disturbing plate is driven to reciprocate in the vertical direction by the paddle rotor.

[0017] Further, the paddle rotor comprises a plurality of paddles, and the length of one of the paddles in the direction perpendicular to the rotating shaft is greater than that of the remaining paddles and is a driving paddle, the driving paddle drives one end of the flow disturbing plate to reciprocate in the vertical direction; the flow disturbing plate is arranged between the paddle rotor and the sediment removing device, and the sampling device is arranged corresponding to the flow disturbing plate.

[0018] Further, the paddle rotor is arranged to rotate on the pipe body of the sewage pipe through the two ends, one end of the paddle rotor extends to the outside of the sewage pipe and is provided with a damping assembly, a fixing sleeve corresponding to the damping assembly is arranged on the outer wall of the sewage pipe, the fixing sleeve is coaxial with the rotating shaft of the paddle rotor, and the damping assembly slides on the inner wall of the fixing sleeve in the circumferential direction.

[0019] Beneficial effects: the present application removes the sediment deposited in the sewage pipe first, then fully mixes the sewage solution, and timely samples the mixed solution, avoids the one-sidedness of water quality sampling, and improves the representativeness of the water quality sample to be detected. BRIEF DESCRIPTION OF DRAWINGS

[0020] ATTACHED Figure 1 It is a water quality sampling flowchart in the water quality analysis of the present application;

[0021] ATTACHED Figure 2 It is a top view of the overall structure of the analysis system of the present application;

[0022] ATTACHED Figure 3 It is a half-section view of the analysis system of the present application in A-A direction;

[0023] ATTACHED Figure 4 It is an enlarged schematic view of the slag removing device of the analysis system of the present application;

[0024] ATTACHED Figure 5 It is an enlarged schematic view of the structure of part C of the analysis system of the present application;

[0025] ATTACHED Figure 6 It is a half-section view of the analysis system of the present application in B-B direction. DETAILED DESCRIPTION

[0026] The application will be further described below with reference to the drawings.

[0027] As shown in the accompanying Figure 1 The water quality online analysis method based on domestic chips includes the following steps:

[0028] S1: The sewage solution in the sewage pipe is subjected to deslagging treatment to remove the silt and solid bottom sediment deposited at the bottom of the pipe body in the flowing state of the sewage solution, and the position distribution state of the water solution in the sewage pipe is maintained in the longitudinal direction during the deslagging treatment;

[0029] S2: The separated sewage solution continues to flow in the pipe body, and the upper and lower solutions in the sampling area are mixed by the flow disturbing device during the flowing process, and sampling is performed on the path after the solution mixing;

[0030] S3: The mixed solution is subjected to slow flow to slow down the flow speed of the solution in the sampling area and between the sampling area and the flow mixing area, and the liquid dispersion time after the exchange of the upper and lower liquids is prolonged;

[0031] S4: The mixed sewage solution is periodically sampled, and the sewage solution sampled each time is detected and analyzed by the detection equipment. By removing the deposits deposited in the sewage pipe first, then fully mixing the sewage solution, and sampling the mixed solution in time, the one-sided defect of water quality sampling is avoided, and the representativeness of the water quality sample to be detected is improved.

[0032] During the sampling of the sewage solution, the sampling process in a period is completed by multiple collection and small amount collection each time, the sewage solution collected each time is mixed and collected in a sample container, and multiple sampling is performed in a period of time, so that the sample solution has high representativeness.

[0033] When there is a water flow channel in the sewage pipe, the overall time is evenly divided into several sampling time points during the sampling process in each period, and the sewage solution is sampled at each sampling time point, so that the sampling solutions at multiple time points are mixed.

[0034] When the sewage in the sewage pipe is intermittent pollution, each time the water flow passes through the sewage pipe during the sampling process in each period is defined as a sampling time point, a water flow sensor is arranged in the sewage pipe to detect whether there is a water flow channel in the pipe body, and the sewage solution is sampled at each sampling time point, and then the sampling solutions at multiple time points are obtained.

[0035] As shown in the accompanying Figure 2 to the accompanying Figure 6As shown, the analysis system based on the online water quality analysis method using domestically produced chips has a sludge removal device 2, a flow disturbance device 3, and a sampling device 4 sequentially arranged on a sewage pipe 1 in the direction of solution flow. The sewage pipe 1 can be a main sewage discharge pipe or a branch pipe on the main sewage discharge pipe, depending on the application. The sludge removal device 2 and the flow disturbance device 3 are arranged one after the other on the sewage pipe 1 in the direction of water flow. The sampling device 4 is arranged adjacent to one side of the flow disturbance device 3. The sludge removal device 2 removes sediment from the bottom layer of the sewage pipe 1 and, while removing sludge, maintains the longitudinal distribution of the aqueous solution inside the sewage pipe to remain basically unchanged or with minimal vertical fluctuation. The flow disturbance device 3 locally mixes and disturbs the upper and lower layers of the sewage solution, allowing partial exchange between the upper and lower liquid layers. The resulting mixed liquid disperses as it continues to flow. The sampling device 4, which is a water pump, intermittently samples the mixed sewage solution. The sludge removal device 2 removes sludge from the sewage at the inlet end of the sewage pipe, and then the turbulence device 3 mixes the sludge-removed solution to prevent precipitated sludge from mixing into the sampling solution.

[0036] As attached Figure 3 and attached Figure 4 As shown, the slag removal device 2 includes a slag container 5 and a sealing piston 7. The slag container 5 is a cylindrical structure with its top and bottom openings connected to the bottom wall of the sewage pipe 1. The bottom wall of the sewage pipe 1 has a slag outlet 9 corresponding to the slag container. A perforated plate 11 is installed inside the sewage pipe 1 corresponding to the slag outlet 9. The perforated plate 11 is located behind the slag outlet in the water flow direction. The perforated plate 11 blocks the settled residue, causing it to fall into the slag outlet, while allowing the aqueous solution to pass through. A lifting mechanism 6 is installed at intervals below the bottom opening of the slag container 5. The lifting mechanism 6 is an electric push rod. The sealing piston 7 is slidably and sealingly installed inside the bottom opening of the slag container 5 through the lifting mechanism. The sealing piston 7 blocks or opens the bottom opening of the slag container 5 through the lifting mechanism. When the sealing piston is inside the sediment container, the bottom of the container is sealed. When water flows through the sewage pipe, the precipitated solids fall into the sediment container and accumulate. When there is too much sediment in the sediment container, the sealing piston moves downward through the lifting mechanism, causing the bottom opening of the container to open. After the opening is open, the sediment on the sealing piston falls downward and is discharged from the sediment container.

[0037] The top surface of the sealing piston 7 has a conical structure, which facilitates the discharge of sediment on the sealing piston.

[0038] The top end of the lifting mechanism 6 is provided with an elastic body 10 which is guided and elastically stretched in the lifting direction, the elastic body 10 is a guided spring structure, and the sealing piston 7 is connected to the lifting mechanism 6 through the elastic body 10. The bottom end opening of the sediment container 5 contains a ring segment corresponding to the sealing piston 7, and the sealing piston seals slidingly relative to the ring end. When the sealing piston is displaced downward, due to the sliding friction between the sealing piston 7 and the wall of the sediment container 5, at the beginning of displacement, there is a relative displacement between the sealing piston and the top end of the lifting mechanism, and the elastic body 10 is stretched, and then, when the sealing piston follows and is displaced downward out of the bottom end opening of the sediment container 5, under the restoring action of the elastic body, the sealing piston reciprocates axially relative to the lifting mechanism and the sediment container 5, so that the deposits on the sealing piston are shaken off.

[0039] As shown in the accompanying drawings Figure 3 and the accompanying drawings Figure 5 As shown in the accompanying drawings, the flow disturbing device 3 includes a paddle rotor 12, a flow disturbing plate 13 and an elastic restoring member 14, the flow disturbing plate 13 contains a rotating shaft 15 which is rotationally arranged in the sewage pipe 1 in the radial direction, the flow disturbing plate 13 is arranged to reciprocate in a plane which is tangent to the water flow direction through the rotating shaft 15, the flow disturbing plate 13 is elastically connected relative to the sewage pipe 1 through the elastic restoring member 14, the paddle rotor 12 is rotationally arranged in the sewage pipe, and the axial direction of the paddle rotor 12 is the same as that of the flow disturbing plate, the paddle rotor 12 is driven by the water flow, and the paddle rotor drives one end of the flow disturbing plate 13 to reciprocate, when the water flow flows, the flow disturbing plate 3 oscillates to mix the solution.

[0040] The paddle rotor 12 contains a plurality of paddles, the two ends of the paddles in the axial direction are spaced apart from the inner wall of the sewage pipe 1, so that part of the solution can continue to pass without passing through the paddles, and one of the paddles has a length greater than that of the remaining paddles in the direction perpendicular to the rotating shaft direction and is a driving paddle 16 which drives one end of the flow disturbing plate 13 to reciprocate vertically; the sampling device 4 is arranged corresponding to the flow disturbing plate and the paddle rotor, and samples the water solution after being disturbed. The flow disturbing plate 13 is arranged between the paddle rotor 12 and the sediment device 3, and when the water flows in the sewage pipe, it first passes through the flow disturbing plate for disturbance, and then passes through the paddle rotor, which has two aspects of effects: one is to mix the sewage solution, and the other is to block the flow of the water solution when the sewage passes through the paddle rotor 12, thereby prolonging the residence time of the water solution in the flow disturbing area, ensuring the mixing sufficiency, and facilitating the sampling of the sampling device.

[0041] The paddle rotor 12 is respectively penetrated and rotated on the pipe body of the sewage pipe 1, one end of the paddle rotor 12 is extended out of the sewage pipe 1 and is provided with an encoder 18 for detecting water flow, one end of the paddle rotor 12 is extended to the outside of the sewage pipe 1 and is provided with a damping assembly 21, a fixed sleeve 22 is arranged on the outer wall of the sewage pipe 1 corresponding to the damping assembly 21, the fixed sleeve 22 is coaxial with the rotary shaft of the paddle rotor, the damping assembly 21 and the inner wall of the fixed sleeve 22 slide circumferentially, that is, the rotary shaft of the paddle rotor and the fixed sleeve 22 are damped by the damping assembly, the damping assembly is a rubber sleeve, which is used to slow down the rotary speed of the paddle rotor, so that the flow in the turbulence area between the sediment outlet 9 and the paddle rotor can be slow, and the mixing degree of the solution is improved.

[0042] The detection instrument equipment used in the scheme is LC-CODcr01 type COD water quality online automatic monitoring instrument, and the water solution sampled by the sampling device 4 is transported to the cuvette in the equipment through the water pipe, as a further optimization of the scheme, the touch screen of the man-machine interface can be completely localized.

[0043] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A water quality online analysis method based on a domestic chip, characterized in that: The analysis system for the online analysis method comprises a slag removal device (2), a flow disturbance device (3) and a sampling device (4) arranged in sequence in the flow direction of the solution on the sewage pipe (1), the sampling device (4) is arranged adjacent to one side of the flow disturbance device (3), the slag removal device (2) removes the sediment on the bottom of the sewage pipe (1) and maintains the position distribution state of the aqueous solution in the sewage pipe in the longitudinal direction during the slag removal process; the flow disturbance device (3) locally mixes and disturbs the upper and lower layers of the sewage solution, and the sampling device (4) intermittently samples the mixed sewage solution; The flow disturbance device (3) comprises a paddle rotor (12), a flow disturbance plate (13) and an elastic reset member (14), the flow disturbance plate (13) comprises a rotating shaft (15), the rotating shaft (15) is arranged in rotation in the radial direction in the sewage pipe (1), the flow disturbance plate (13) is arranged in reciprocating swing in a plane intersecting the water flow direction through the rotating shaft (15), the flow disturbance plate (13) is elastically connected to the sewage pipe (1) through the elastic reset member (14), the paddle rotor (12) is arranged in rotation in the sewage pipe, and the axial direction of the paddle rotor (12) is the same as that of the flow disturbance plate, the paddle rotor (12) is driven by the water flow, and one end of the paddle rotor drives the flow disturbance plate (13) to reciprocate swing; when the water flow flows, the flow disturbance plate (13) oscillates to mix the solution; The paddle rotor (12) comprises a plurality of blades, the two ends of the blades in the axial direction are spaced apart from the inner wall of the sewage pipe (1), so that part of the solution can continue to pass without passing through the blades, and one of the blades has a length greater than that of the remaining blades in the direction perpendicular to the rotating shaft and is a driving blade (16), the driving blade drives one end of the flow disturbance plate (13) to reciprocate swing in the vertical direction; the flow disturbance plate (13) is arranged between the paddle rotor (12) and the slag removal device, the sampling device (4) is arranged corresponding to the flow disturbance plate and the paddle rotor, and samples the disturbed aqueous solution; the paddle rotor (12) can not only mix the sewage solution, but also can perform a certain flow resistance on the aqueous solution when the sewage passes through the paddle rotor (12), thereby prolonging the residence time of the aqueous solution in the flow disturbance area, ensuring the mixing sufficiency, and facilitating sampling by the sampling device; The two ends of the paddle rotor (12) are respectively arranged in rotation in the pipe body of the sewage pipe (1), one end of the paddle rotor (12) extends to the outside of the sewage pipe (1) and is provided with a damping assembly (21), a fixed sleeve (22) corresponding to the damping assembly (21) is arranged on the outer wall of the sewage pipe (1), the fixed sleeve (22) is coaxial with the rotating shaft of the paddle rotor, and the damping assembly (21) slides circumferentially on the inner wall of the fixed sleeve (22); the damping assembly can slow down the rotation speed of the paddle rotor, so that the flow of the solution in the flow disturbance area formed between the slag outlet (9) and the paddle rotor is slowed down, and the mixing degree of the solution is improved; The online analysis method based on the above analysis system comprises the following steps: S1: the sewage solution in the sewage pipe is subjected to deslagging treatment to remove the silt and solid bottom sediment of the sewage solution deposited at the bottom of the pipe body in a flowing state, and the position distribution state of the aqueous solution in the sewage pipe is maintained in the longitudinal direction during the deslagging treatment; S2: the separated sewage solution continues to flow in the pipe body, and is subjected to flow disturbance by a flow disturbance device during the flowing process, so that the upper and lower solutions in the sampling area are mixed in the longitudinal section of the pipe body, and sampling is performed on the path after the solution mixing; S3: the mixed solution is subjected to slow flow to slow down the flow speed of the solution in the sampling area and between the sampling area and the flow disturbance mixing area, and to prolong the liquid dispersion time after the exchange of the upper and lower liquids; S4: the mixed sewage solution is periodically sampled, and each sampled sewage solution is detected and analyzed by a detection device.

2. The method according to claim 1, wherein: During the sampling of the sewage solution, the sampling process in a period is completed by multiple sampling and small amount sampling each time, and the sewage solution sampled each time is mixed and collected in a sample container.

3. The method according to claim 2, wherein: When there is a continuous water flow channel in the sewage pipe, the overall time is evenly divided into several sampling times during the sampling process in each period, and the sewage solution is sampled at each sampling time.

4. The method according to claim 2, wherein: When the sewage in the sewage pipe is intermittent pollution, the sampling time is when the water flow passes through the inside of the sewage pipe during the sampling process in each period, and the sewage solution is sampled at each sampling time. 5.The analysis system of the domestic chip-based water quality online analysis method according to claim 1, characterized in that: The deslagging device (2) comprises a sediment container (5) and a sealing piston (7), the sediment container (5) is a cylinder structure with a through opening from top to bottom, the top opening of the sediment container (5) is communicated with the bottom wall of the sewage pipe (1), the bottom wall of the sewage pipe (1) is provided with a sediment port (9) corresponding to the sediment container, a lifting mechanism (6) is arranged below the bottom opening of the sediment container (5) at a distance, and the sealing piston (7) is slidingly and sealingly arranged in the bottom opening of the sediment container (5) through the lifting mechanism. The sealing piston (7) blocks or opens the bottom opening of the sediment container (5) through the lifting mechanism. 6.The analysis system of the domestic chip-based water quality online analysis method according to claim 5, characterized in that: The top surface of the sealing piston (7) is a conical structure, the top end of the lifting mechanism (6) is provided with an elastic body (10), the elastic body (10) is elastically stretched and contracted in the lifting direction, and the sealing piston (7) is connected to the lifting mechanism (6) through the elastic body (10).

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