Water quality detection device in sewage treatment process
By combining the online intermittent wet chemical detection and ion detector method, a water quality detection device for sewage treatment process is designed, real-time monitoring and accurate detection results are achieved, and the problem of water quality detection in the prior art is not real-time and the detection results are offset.
Patent Information
- Application Number
- CN202421485484.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-06-26
AI Technical Summary
During the existing sewage treatment process, it is difficult for water quality detection devices to achieve real-time monitoring, and the ion detector is easily affected by factors such as temperature and pH, resulting in a deviation in the detection results.
A water quality detection device for sewage treatment process is designed, combining online intermittent wet chemical detection and ion detector method, through the design of precipitation water tank and detection water tank, water sample precipitation and supernatant detection are realized, and the detector results are calibrated by chemical detection instruments to ensure the accuracy of the detection results.
Real-time monitoring of water quality detection is realized, the risk of secondary pollution is reduced, operation and maintenance costs are reduced, and the error caused by environmental factors of the detector is corrected through calibration functions, improving the accuracy of the detection results.
Smart Images
Figure CN223037920U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of sewage treatment, and particularly relates to a water quality detection device in the process of sewage treatment. Background Technique
[0002] The biochemical section of a sewage treatment plant is the main stage for removing soluble pollutants in domestic sewage. Among them, the nitrogen and phosphorus indicators are easily affected by the impact of inlet load fluctuations. It is very difficult to monitor the nitrogen and phosphorus removal effects in the biochemical section in real time only by focusing on the inlet and outlet data. Therefore, it is very necessary to deploy a detection device in the biochemical section to detect the nitrogen and phosphorus indicators in the process section. At present, the commonly used methods for water quality detection and analysis in the sewage treatment process in the industry are on-line intermittent wet chemical detection and ion detector method.
[0003] When using on-line intermittent wet chemical detection and analysis to measure the water quality in the sewage treatment process, the data output speed is slow, the frequency is low, and it is easy to cause secondary pollution, and it is impossible to provide scientific and reliable data support for the adjustment of process parameters in time. Due to reasons such as cost and operation and maintenance, it is impossible to monitor the water quality in real time, which may lead to problems such as unqualified effluent and untimely process adjustment.
[0004] Adopting the ion detector method can effectively solve the problems caused by the chemical method. In water quality detection, continuous detection using an ion detector can obtain real-time detection results, and there is no drug consumption, which reduces costs and the maintenance workload of maintenance personnel at the same time. However, the ion detector is easily affected by factors such as temperature and pH value. During long-term operation, the detector may have systematic errors, resulting in deviation of the water quality detection results. Content of the Utility Model
[0005] One of the purposes of the utility model is to provide a water quality detection device in the process of sewage treatment, which can perform real-time detection of water quality by combining on-line intermittent wet chemical detection and the detector method, and solve the problem that the detector will have errors during long-term operation, resulting in deviation of the water quality detection results.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0007] A water quality detection device for sewage treatment process, comprising a number of detection components and chemical detection instruments; each of the detection components includes a sedimentation water tank, a detection water tank connected to the sedimentation water tank, and a detector installed on the detection water tank and used for detecting the water quality in the detection water tank; the detection water tank is communicated with the chemical detection instrument through a sampling pipe; the sedimentation water tank is provided with a first water inlet pipe for communicating with a water pool, a first pump body connected to the first water inlet pipe, and a first water outlet at the bottom; the detection water tank is provided with a second water inlet pipe for communicating with the upper end of the sedimentation water tank and a second water outlet at the bottom; the first water inlet pipe, the second water inlet pipe, the first water outlet, the second water outlet and the sampling pipe are all provided with first valves.
[0008] In the above technical solution, the first pump body pumps the water sample to be tested from the water pool and enters it into the sedimentation water tank through the first water inlet pipe. When the water sample to be tested enters the sedimentation water tank to a certain liquid level, the first pump body stops sampling and closes the first valve on the first water inlet pipe. After allowing the water sample to be tested to sediment in the sedimentation water tank for a period of time, the first valve on the second water inlet pipe is opened to allow the supernatant of the water sample to be tested to enter the detection water tank along the second water inlet pipe, and the detector detects the liquid in the detection water tank and sends the detection result to the background. At the online intermittent wet chemical detection node, a water sample the same as that detected by the detector is obtained through the sampling pipe. If the result of the chemical detection instrument is inconsistent with the detection result of the detector or exceeds the preset value, then the detector is calibrated according to the result of the chemical detection instrument. After calibration, the detection result of the detector can be restored to a more accurate value. When the supernatant of the sedimentation water tank enters the detection water tank along the second water inlet pipe, the first valve of the first water outlet is opened, and the water sample to be tested flows out from the first water outlet. When all the water samples to be tested flow away, the first valve of the first water outlet is closed. The first pump body pumps the water sample to be tested from the water pool to the sedimentation water tank for a second sedimentation and measurement. After the detection is completed, the sample in the detection water tank also flows away from the second water outlet.
[0009] Preferably, the detector is installed on the top of the detection water tank and the detection head extends into the supernatant section in the detection water tank; one end of the sampling pipe extends into the supernatant section in the detection water tank. The liquid in the detection water tank is the supernatant of the sedimentation water tank, and the sludge content is very small. However, in order to further reduce the contact time of the detector with the sludge, in the detection water tank, after allowing the water sample to be tested to sediment for a period of time, the detector only detects the supernatant section in the detection water tank. In order to ensure that the sample detected by the chemical detection instrument is the same as the sample detected by the detector, the sampling pipe only collects the supernatant section in the detection water tank.
[0010] Preferably, the detection water tank is provided with a first overflow port, and the end of the detection head of the detector is located at three - quarters or one - third of the distance between the first overflow port and the bottom of the detection water tank. The end of the sampling pipe is flush with the end of the detection head of the detector. Since the sludge content of the water sample to be tested entering the detection water tank is already very low, the sludge content will not exceed one - quarter of the total volume. Based on this, the turbid liquid occupies one - quarter of the volume from the detection water tank to the first overflow port, and the remaining three - quarters is basically clear liquid. Therefore, the end of the detection head located at three - quarters of the distance between the first overflow port and the bottom of the detection water tank is just the boundary between the clear sample and the turbid liquid. In order to ensure that the detection head is farther away from the turbid liquid, the detection head is preferably only located between the first overflow port and the liquid level of the turbid liquid. At the same time, in order to allow the detection head to be completely immersed in the clear sample and the sampling pipe to collect enough samples, the detection head is at least located at one - third of the distance between the first overflow port and the bottom of the detection water tank.
[0011] Preferably, the sedimentation water tank is provided with a second overflow port above the second water inlet pipe, and the volume between the liquid level where the second overflow port is located and the liquid level where the second water inlet pipe is located is equal to or greater than the volume between the first overflow port and the bottom of the detection water tank. Only the supernatant liquid located between the second overflow port and the second water inlet pipe can enter the detection water tank along the second water inlet pipe, and this part of the supernatant liquid can fill the volume between the first overflow port and the bottom of the detection water tank to ensure that the detection head and the sampling pipe can be immersed in the water sample to be tested.
[0012] Preferably, the volume between the liquid level where the second overflow port is located and the liquid level where the second water inlet pipe is located is one - fifth to one - third of the volume between the liquid level where the second overflow port is located and the bottom of the sedimentation water tank. In the sedimentation water tank, the sludge content in the supernatant liquid closer to the upper section is lower. In order to reduce the amount of mud entering the detection water tank, only one - fifth to one - third of the supernatant liquid at the uppermost part of the sedimentation water tank flows into the detection water tank.
[0013] Preferably, the sedimentation water tank is also provided with a first cleaning port, and the detection water tank is provided with a second cleaning port. After the water sample to be tested in the sedimentation water tank is discharged through the first water outlet, clean water is injected through the first cleaning port to clean the sedimentation water tank. Similarly, after the water sample to be tested in the detection water tank is discharged through the second water outlet, clean water is injected through the second cleaning port.
[0014] Preferably, the first cleaning port is located at the top of the sedimentation water tank, and the second cleaning port is located at the bottom or the top of the detection water tank.
[0015] Preferably, second valves are provided at both the first cleaning port and the second cleaning port.
[0016] Preferably, the sampling tube includes a main pipe and a branch pipe. One end of the main pipe communicates with the detection water tank, and the other end communicates with the chemical detection instrument; the branch pipe communicates with the main pipe; valves are provided on both the main pipe and the branch pipe. The water sample to be tested can enter the chemical detection equipment through the main pipe. If too much water sample to be tested is drawn, it can be drained through the branch pipe.
[0017] Preferably, a second water pump is provided on the sampling tube. The second water pump can accelerate the speed of the sampling tube for collecting the water sample to be tested.
[0018] The beneficial effects of the present utility model: After the detector has been detecting for a period of time, the chemical detection instrument that performs detection at intervals compares the detection results of the detector, and calibrates the detection results of the detector after an error that affects the detection results occurs in the detector, solving the problem that the ion probe method is affected by factors such as temperature and acidity, resulting in inaccurate detection results due to deviation. At the same time, the detection frequency of the chemical detection instrument will also be reduced, and it is not easy to cause secondary pollution. Description of the Drawings
[0019] Figure 1 It is a schematic diagram of a water quality detection device for sewage treatment process of the present utility model;
[0020] Figure 2 It is a schematic diagram of the detection component of the present utility model;
[0021] Figure 3 It is a schematic diagram of another embodiment of the detection component of the present utility model. Detailed Embodiments
[0022] The following will describe the embodiments of the present utility model with reference to the drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be understood that the preferred embodiments are only for illustrating the present utility model and not for limiting the protection scope of the present utility model.
[0023] It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present utility model in a schematic manner. Therefore, only the components related to the present utility model are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.
[0024] Embodiment 1
[0025] AsFigure 1-2 Shown is Embodiment 1 of a water quality detection device for a sewage treatment process, including a number of detection components and a chemical detection instrument 1; the detection components each include a sedimentation water tank 2, a detection water tank 3 connected to the sedimentation water tank 2, and a detector 4 installed on the detection water tank 3 and used to detect the water quality in the detection water tank 3; the detection water tank 3 is communicated with the chemical detection instrument 1 through a sampling pipe 5; the sedimentation water tank 2 is provided with a first water inlet pipe 6 for communicating to a water pool, a first pump body 7 connected to the first water inlet pipe 6, and a first water outlet 8 at the bottom; the detection water tank 3 is provided with a second water inlet pipe 9 for communicating with the upper end of the sedimentation water tank 2 and a second water outlet 10 at the bottom; the first water inlet pipe 6, the second water inlet pipe 9, the first water outlet 8, the second water outlet 10, and the sampling pipe 5 are all provided with first valves 11. In this embodiment, there are three detection components, and the three detection components are all connected to the same chemical detection instrument 1, but it is not limited to three.
[0026] Among them, the detector 4 is installed at the top of the detection water tank 3 and the detection head 401 extends into the supernatant section in the detection water tank 3; one end of the sampling pipe 5 extends into the supernatant section in the detection water tank 3. The water in the detection water tank 3 is the supernatant of the sedimentation water tank 2, and the sludge content is very low. However, in order to further reduce the contact time of the detector 4 with the sludge, in the detection water tank 3, the water sample to be measured is also allowed to settle for a period of time, and then the detector 4 only detects the supernatant section in the detection water tank 3. In order to ensure that the sample detected by the chemical detection instrument 1 is the same as the sample detected by the detector 4, the sampling pipe 5 also only collects the supernatant section in the detection water tank 3. In order to make the detection head 401 of the detector 4 and the sampling pipe 5 both contact the supernatant section, it can be achieved by controlling the liquid level in the detection water tank 3 and the installation positions of the detection head 401 and the sampling pipe 5. In this embodiment, the detection water tank 3 is provided with a first overflow port 301, and the end of the detection head 401 of the detector 4 is located at three-fourths or one-third of the distance between the first overflow port 301 and the bottom of the detection water tank 3, and the end of the sampling pipe 5 is flush with the end of the detection head 401 of the detector 4. Since the sludge content of the water sample to be measured entering the detection water tank 3 is already very low, the sludge content does not exceed one-fourth of the total volume. Based on this, the turbid liquid occupies one-fourth of the volume from the detection water tank 3 to the first overflow port 301, and the remaining three-fourths is basically clear liquid. Therefore, the end of the detection head 401 is located at three-fourths of the distance between the first overflow port 301 and the bottom of the detection water tank 3, which is just the boundary between the clear sample and the turbid liquid. In order to ensure that the detection head 401 is farther away from the turbid liquid, the detection head 401 is preferably only located between the first overflow port 301 and the liquid level of the turbid liquid. At the same time, in order to allow the detection head 401 to be completely immersed in the clear sample and the sampling pipe 5 to collect enough samples, the detection head 401 is at least located at one-third of the distance between the first overflow port 301 and the bottom of the detection water tank 3.
[0027] Specifically, a second overflow port 201 is provided above the precipitation water tank 2 at the second water inlet pipe 9. The volume between the liquid level where the second overflow port 201 is located and the liquid level where the second water inlet pipe 9 is located is equal to or greater than the volume from the first overflow port 301 to the bottom of the detection water tank 3. Only the supernatant liquid between the second overflow port 201 and the second water inlet pipe 9 can enter the detection water tank 3 along the second water inlet pipe 9, and this part of the supernatant liquid can fill the volume from the first overflow port 301 to the bottom of the detection water tank 3, ensuring that the detection head 401 and the sampling pipe 5 are immersed in the water sample to be measured.
[0028] Further, the volume between the liquid level where the second overflow port 201 is located and the liquid level where the second water inlet pipe 9 is located is one-fifth to one-third of the volume from the liquid level where the second overflow port 201 is located to the bottom of the precipitation water tank 2. In the precipitation water tank 2, the mud content in the supernatant liquid closer to the upper section is lower. In order to reduce the amount of mud entering the detection water tank 3, only one-fifth to one-third of the supernatant liquid at the uppermost end in the precipitation water tank 2 flows into the detection water tank 3.
[0029] The working principle or process of this embodiment: The first pump body 7 pumps the water sample to be measured from the water pool and enters the precipitation water tank 2 through the first water inlet pipe 6. When the water sample to be measured enters the precipitation water tank 2 to a certain liquid level, the first pump body 7 stops sampling and closes the first valve 11 on the first water inlet pipe 6. After allowing the water sample to be measured to precipitate in the precipitation water tank 2 for a period of time, the first valve 11 on the second water inlet pipe 9 is opened to allow the supernatant liquid of the water sample to be measured to enter the detection water tank 3 along the second water inlet pipe 9. After the water sample to be measured precipitates in the detection water tank 3 for a period of time, the detector 4 detects the liquid in the detection water tank 3 and sends the detection result to the background. At the online intermittent wet chemical detection node, a water sample the same as that detected by the detector 4 is obtained through the sampling pipe 5. If the result of the chemical detection instrument 1 is inconsistent with the detection result of the detector 4 or exceeds the preset value, then the detector 4 is calibrated according to the result of the chemical detection instrument 1. After calibration, the detection result of the detector 4 can be restored to a more accurate value. When the supernatant liquid of the precipitation water tank 2 enters the detection water tank 3 along the second water inlet pipe 9, the first valve 11 of the first water outlet 8 is opened, and the water sample to be measured flows out from the first water outlet 8. When all the water samples to be measured have flowed away, the first valve 11 of the first water outlet 8 is closed. The first pump body 7 pumps the water sample to be measured from the water pool to the precipitation water tank 2 for a second precipitation and measurement. After the detection is completed, the sample in the detection water tank 3 also flows away from the second water outlet 10. Among them, the calibration method can be to superimpose the difference between the two methods on the basis of the detection value of the detector.
[0030] Advantages of this embodiment: After the detector 4 has been detecting for a period of time, the chemical detection instrument 1 that performs detection at intervals compares the detection results of the detector 4, and calibrates the detection results of the detector 4 after an error that affects the detection results occurs, solving the problem that the ion probe method is affected by factors such as temperature and acidity, and the detection results deviate and become inaccurate. At the same time, the detection frequency of the chemical detection instrument 1 will also decrease, and it is not easy to cause secondary pollution.
[0031] Embodiment 2
[0032] An embodiment 2 of a water quality detection device in the sewage treatment process, which is different from embodiment 1 in that, as Figure 3 shown, the sedimentation water tank 2 is further provided with a first cleaning port 202, and the detection water tank 3 is provided with a second cleaning port 302. After the water sample to be tested in the sedimentation water tank 2 is discharged through the first water outlet 8, clean water is injected through the first cleaning port 202 to clean the sedimentation water tank 2. Similarly, after the water sample to be tested in the detection water tank 3 is discharged through the second water outlet 10, clean water is injected through the second cleaning port 302. The first cleaning port 202 is located at the top of the sedimentation water tank 2, and the second cleaning port 302 is located at the bottom or top of the detection water tank 3. Both the first cleaning port 202 and the second cleaning port 302 are provided with second valves.
[0033] The remaining features and technical effects of this embodiment are the same as those of embodiment 1.
[0034] Embodiment 3
[0035] An embodiment 3 of a water quality detection device in the sewage treatment process, which is different from embodiment 1 in that, as Figure 3 shown, the sampling pipe 5 includes a main pipe 501 and a branch pipe 502. One end of the main pipe 501 is connected to the detection water tank 3, and the other end is connected to the chemical detection instrument 1; the branch pipe 502 is connected to the main pipe 501; both the main pipe 501 and the branch pipe 502 are provided with valves. The water sample to be tested can enter the chemical detection equipment through the main pipe 501, and if too much water sample to be tested is extracted, it can be drained through the branch pipe 502. A second water pump 12 is provided on the sampling pipe 5. The second water pump 12 can accelerate the speed of collecting the water sample to be tested by the sampling pipe 5.
[0036] The remaining features and technical effects of this embodiment are the same as those of embodiment 1.
[0037] The above embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention.
Claims
1. A water quality detection device for a sewage treatment process, characterized in that: The invention comprises a plurality of detection components and a chemical detection instrument (1); the detection components each comprise a sedimentation water tank (2), a detection water tank (3) connected to the sedimentation water tank (2), and a detector (4) installed on the detection water tank (3) and used to detect the water quality in the detection water tank (3); the detection water tank (3) is connected to the chemical detection instrument (1) through a sampling tube (5); the sedimentation water tank (2) is provided with a first water inlet pipe (6) for connecting to a water pool, a first pump body (7) connected to the first water inlet pipe (6), and a first water outlet (8) located at the bottom; the detection water tank (3) is provided with a second water inlet pipe (9) for connecting to the upper end of the sedimentation water tank (2) and a second water outlet (10) located at the bottom; the first water inlet pipe (6), the second water inlet pipe (9), the first water outlet (8), the second water outlet (10) and the sampling tube (5) are all provided with a first valve (11).
2. A water quality detection device for sewage treatment process according to claim 1, characterized in that: The detector (4) is installed on the top of the detection water tank (3) and the detection head (401) extends into the supernatant section in the detection water tank (3); one end of the sampling tube (5) extends into the supernatant section in the detection water tank (3).
3. A water quality detection device for sewage treatment process according to claim 2, characterized in that: The detection water tank (3) is provided with a first overflow port (301), the end of the detection head (401) of the detector (4) is located at one third or one half of the distance between the first overflow port (301) and the bottom of the detection water tank (3), and the end of the sampling tube (5) is flush with the end of the detection head (401) of the detector (4).
4. A water quality detection device for sewage treatment process according to claim 3, characterized in that: The sedimentation water tank (2) is provided with a second overflow port (201) located above the second water inlet pipe (9), and the volume between the liquid level at the second overflow port (201) and the liquid level at the second water inlet pipe (9) is equal to or greater than the volume from the first overflow port (301) to the bottom of the detection water tank (3).
5. A water quality detection device for sewage treatment process according to claim 4, characterized in that: The volume between the liquid level at which the second overflow port (201) is located and the liquid level at which the second water inlet pipe (9) is located is one fifth to one third of the volume between the liquid level at which the second overflow port (201) is located and the bottom of the sedimentation water tank (2).
6. A sewage treatment process water quality detection device according to any one of claims 1 to 5, characterized in that: The sedimentation water tank (2) is also provided with a first cleaning port (202), and the detection water tank (3) is provided with a second cleaning port (302).
7. A water quality detection device for sewage treatment process according to claim 6, characterized in that: The first cleaning port (202) is located at the top of the sedimentation water tank (2), and the second cleaning port (302) is located at the bottom or top of the detection water tank (3).
8. A water quality detection device for sewage treatment process according to claim 6, characterized in that: The first cleaning port (202) and the second cleaning port (302) are both provided with a second valve.
9. A water quality detection device for sewage treatment process according to claim 1, characterized in that: The sampling pipe (5) comprises a main pipe (501) and a branch pipe (502); one end of the main pipe (501) is connected to the detection water tank (3), and the other end is connected to the chemical detection instrument (1); the branch pipe (502) is connected to the main pipe (501); the main pipe (501) and the branch pipe (502) are both provided with a first valve (11).
10. A water quality detection device for sewage treatment process according to claim 6, characterized in that: The sampling tube (5) is provided with a second water pump (12).