Integrated online nitrate nitrogen instrument sampling device for sewage plant

Abstract

The utility model relates to an integrated on-line nitrate nitrogen instrument sampling device for a sewage plant, which comprises a box body, a control device, a sampling pump, a filtering device, a suction pump, a liquid level meter, an on-line nitrate nitrogen instrument, a sampling device and a plurality of series of biological pools, the device is arranged on or outside the plurality of series of biological pools, and a plurality of sampling points are arranged on the plurality of series of biological pools. The sampling pump is used for collecting a water sample at a sampling point, the filter device is used for purifying a liquid to be detected, the suction pump is intermittently started for extracting the liquid to be detected, the online nitrate nitrogen instrument is used for detecting data, the control device is used for collecting water quality data, and the sampling pump and the suction pump are controlled to realize sampling at different sampling points. The device disclosed by the utility model is small in occupied area, low in cost and capable of realizing automatic operation, effectively saving the service life of an online nitrate nitrogen instrument, improving the measurement precision, reducing the investment of the instrument and reducing the construction cost of a biochemical system.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and in particular relates to an integrated online nitrate nitrogen instrument sampling device for a sewage plant. Background Art

[0002] During operation, sewage treatment plants often rely on online instrument data to assist in controlling process parameters and prevent effluent from exceeding standards. Consequently, online water quality instrumentation is widely used in sewage treatment processes and is a crucial component of process operation. However, these instruments are relatively expensive, especially those from leading brands. These instruments represent a significant portion of the investment in sewage treatment plant automation equipment, significantly increasing construction costs.

[0003] In recent years, the country has raised the emission standards for sewage treatment plants. The demand for energy conservation and consumption reduction under the background of "dual carbon" has made sewage treatment plants gradually pay attention to the treatment effect of biochemical processes, and install online nitrate nitrogen meters in the biochemical section, especially in the anoxic zone, to detect the nitrate nitrogen water quality data entering and leaving the anoxic zone, and accurately adjust the amount of carbon source added to reduce drug consumption. Since the biological pools of sewage treatment plants are divided into multiple series, online meters must be installed in the anoxic section of each series, which undoubtedly increases the investment cost. At the same time, the online nitrate nitrogen meter has high price for wearing parts and requires regular maintenance, which increases the operating cost of the water plant. Therefore, there is an urgent need to find a simple way to reasonably optimize the number of online nitrate nitrogen meters and extend their service life to reduce the investment and operation and maintenance costs of sewage treatment plants. Utility Model Content

[0004] The purpose of this utility model is to solve the above problems. The present application proposes an integrated online nitrate nitrogen instrument sampling device for sewage treatment plants, which reduces the number of online nitrate nitrogen instruments installed in biological pools, reduces the investment in online nitrate nitrogen instruments and subsequent maintenance costs. The installation of the control device enables the device to operate automatically and transmit data remotely.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an integrated online nitrate nitrogen instrument sampling device for a sewage treatment plant, comprising a box, a control device, a sampling pump, a filter device, and a multi-series biological pool, wherein the control device is installed in the box, a plurality of filter devices are provided at the bottom of the box, a plurality of sampling pumps are provided on the outside of the box, the sampling pump is installed at a sampling point near the multi-series biological pool, the multi-series biological pool is three anoxic pools, and a sampling point is provided in each of the three anoxic pools, the sampling point is connected to the water inlet of the sampling pump through a sampling water inlet pipe, the sampling water outlet pipe of the sampling pump respectively penetrates into the bottom of the corresponding filter device, the water outlet of the filter device is respectively connected to the water inlet of the suction pump through the suction pump inlet pipe, the water outlet of the suction pump is connected to the sampling main pipe through the suction pump outlet pipe, the water outlet of the sampling main pipe is connected to the sampling device, and the sampling device is connected to the online nitrate nitrogen instrument.

[0006] Further: the sampling device includes a test liquid sampling port, a water flow channel, a test liquid sampling port, a fastener, and a rotating shaft. The water outlet of the sampling main pipe is connected to the test liquid sampling port through a pipeline. The test liquid sampling pipe at the test liquid sampling port is connected to the overflow pipe and the drain pipe of the filter device to the drain pipe.

[0007] Furthermore: the sampling device is made of rubber or latex, and a water flow channel is arranged inside, and the water flow channel passes through the detection port of the online nitrate nitrogen instrument and is connected to it.

[0008] Furthermore: there are at least two or more sampling pumps, the number of sampling points is consistent with the number of sampling pumps, and the number of filtering devices and suction pumps is also consistent with the number of sampling pumps.

[0009] Furthermore: an MBR membrane assembly is provided at the bottom of the filter device, a liquid level gauge is installed on the top, an emptying device is installed at the bottom position outside the filter device, and an aeration device is installed at the bottom of the MBR membrane assembly.

[0010] Furthermore: the box body is a cubic structure and is made of carbon steel or 304 stainless steel, and a ventilation hole is provided on the box body.

[0011] Furthermore: the suction pump flow rate is 1 to 4 L / min.

[0012] Furthermore: the pipelines in the integrated online nitrate nitrogen instrument sampling device are all made of UPVC or 304 stainless steel, and the pipelines outside the box are insulated.

[0013] Furthermore: the control system of the control device is composed of PLC and host computer software. The control device collects data from the sampling pump, venting device, aeration device, suction pump, liquid level meter, and online nitrate nitrogen instrument, and outputs instructions.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1) The equipment has a simple structure, low cost, low energy consumption, easy maintenance and low operating cost;

[0016] (2) High flexibility: The device has an integrated design and occupies a small area. It can be installed on the biological pool or on the outside of the pool, making it easy to install.

[0017] (3) Improve instrument detection accuracy: effectively prevent activated sludge from clogging the instrument sensor probe, improve detection accuracy, and extend equipment maintenance cycle;

[0018] (4) The device runs automatically without human operation: This device is equipped with a control system. The control system of the control device consists of a PLC and a host computer software. The PLC can reasonably adjust the start and stop of the sampling pump, the suction pump, and the logic of the venting device, so as to realize the data detection of different points by a single online nitrate nitrogen meter. The host computer software automatically calculates and selects the detection value, filters non-critical data, and uploads it to the central control, thus realizing the storage and transmission of effective data. At the same time, the control system has its own alarm system, which is convenient for operation and maintenance personnel to deal with abnormal situations in a timely manner.

[0019] (5) Save water plant investment and operation and maintenance costs: The device can realize the measurement of different points by a single online nitrate nitrogen meter, reducing the number of nitrate nitrogen meters installed in the biological pool and saving investment costs. The operation and maintenance personnel only need to maintain a single nitrate nitrogen meter, which reduces the maintenance cost to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only for more clearly illustrating the embodiments of the present invention or the technical solutions in the prior art. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is the main view of the sample injection device of the utility model;

[0023] Figure 3 This is a top view of the sample injection device of the utility model;

[0024] Figure 4 This is a cross-sectional view of the sample injection device of the utility model;

[0025] Figure 5 This is a schematic diagram of the application of the utility model;

[0026] In the figure: 1-box, 2-control device, 3-sampling pump, 4-filtering device, 5-suction pump, 6-online nitrate nitrogen meter, 7-sampling device, 8-liquid level gauge, 9-multi-series biological pool, 10-sampling point, 11-test liquid inlet, 12-water flow channel, 13-test liquid outlet, 14-fastener, 15-rotating shaft, 16-sampling main pipe, 17-test liquid outlet pipe, 18-drain pipe, 19-sampling water inlet pipe, 20-sampling water outlet pipe, 21-suction pump water inlet pipe, 22-suction pump water outlet pipe. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand and implement the technical solution of the present invention, the present invention is further described below in conjunction with specific embodiments. However, the embodiments are only intended to illustrate the present invention and are not intended to limit the present invention.

[0028] like Figures 1 to 4 The integrated online nitrate nitrogen instrument sampling device for a sewage treatment plant shown in the figure includes a box 1, a control device 2, a sampling pump 3, a filtering device 4, a suction pump 5, an online nitrate nitrogen instrument 6, a sampling device 7, a liquid level meter 8, and a multi-series biological pool 9.

[0029] The box body 1 is a cubic structure made of carbon steel or 304 stainless steel. A vent is provided on the box body 1. A plurality of filter devices 4 are provided at the bottom of the box body 1. The sampling pump 3 is installed at a sampling point 10 near the multi-series biological pool 9. The sampling point 10 is connected to the water inlet of the sampling pump 3 through a sampling water inlet pipe 19. The sampling water outlet pipe 20 of the sampling pump 3 respectively penetrates into the bottom of the corresponding filter device 4. The water outlet of the filter device 4 is respectively connected to the water inlet of the suction pump 5 through the suction pump inlet pipe 21. The water outlet of the suction pump 5 is connected to the sampling main pipe 16 through the suction pump outlet pipe 22. The water outlet of the sampling main pipe 16 is connected to the sampling device 7, and the sampling device 7 is connected to the online nitrate nitrogen meter 6.

[0030] The sampling device 7 includes a test liquid sampling port 11, a water flow channel 12, a test liquid sampling port 13, a fastener 14, and a rotating shaft 15. The outlet of the sampling main pipe 16 is connected to the test liquid sampling port 11 through a pipe. The test liquid sampling pipe 17 at the test liquid sampling port 13 is connected to the overflow pipe and the drain pipe of the filter device 4 and is connected to the drain pipe 18.

[0031] The sample introduction device 7 is made of rubber or latex, and a water flow channel 12 is provided inside. The water flow channel 12 passes through the sensor detection port of the online nitrate nitrogen meter 6 and is connected to it, and then fixed with fasteners to prevent leakage.

[0032] The filter device 4 is provided with an overflow pipe and a drain pipe. A venting device is installed at the bottom of the outer side of the filter device 4. An MBR membrane assembly is installed at the bottom of the filter device for filtration. An aeration device is installed at the bottom of the MBR membrane assembly. The structure and application of the MBR membrane assembly are mature technologies in the prior art and are not improved in this device, so they will not be described in detail. A liquid level gauge 8 is also installed above the filter device.

[0033] There are at least two or more sampling pumps 3 , the number of sampling points 10 is consistent with the number of sampling pumps 3 , and the number of filtering devices 4 and suction pumps 5 is also consistent with the number of sampling pumps 3 .

[0034] The control device 2 is installed in the box 1. The control system of the control device 2 is composed of a PLC and a host computer software. The control device 2 is used to collect data from the sampling pump, the venting device, the aeration device, the suction pump, the liquid level gauge, and the online nitrate nitrogen instrument, and output instructions. It has automatic control, alarm, data analysis, and remote transmission functions.

[0035] like Figure 5 As shown, this is the application diagram of this device, combined with Figure 5 , the use of this device is as follows:

[0036] 1. Install the device on a multi-series biological pool near the outlet of the anoxic pool;

[0037] 2. Set up sampling points for multiple series of biological pools, lay out sampling inlet pipes along the pool wall at the sampling points, connect them to the water inlet of the sampling pump, and extend the sampling outlet pipes deep into the bottom of the filter device;

[0038] 3. Set the liquid level of the liquid level gauge, and start the sampling pump by the control device to inject the sewage sample into the filter device to the set liquid level. Stop the sampling pump, and the excess sewage will overflow into the drain pipe along the overflow pipe and be discharged from the system;

[0039] 4. The suction pump flow rate of the equipment is 4L / min. The suction pump is started by the control device. The sewage is purified by the filter device. The purified test liquid enters the sampling main pipe through the suction pump inlet pipe and the suction pump outlet pipe, and then flows into the sampling device. At this time, the online nitrate nitrogen instrument detects the data and transmits it to the control device. The nitrate nitrogen data detection of the sampling point is completed and the suction pump is stopped. (It should be noted that when the suction pump is started, the filter device connected to it is also started. The sewage is purified by the filter device. The purified test liquid then enters the sampling main pipe through the suction pump inlet pipe and the suction pump outlet pipe connected to it.)

[0040] 5. According to step 4 above, start the suction pumps respectively, test the nitrate nitrogen data of each sampling point respectively, upload it to the central control through the control device, and empty the sewage in the filter device through the venting device to enter the next round of testing.

[0041] The host computer software in the control device can automatically filter out invalid data and transmit valid data to the central control room. When abnormal water inflow or emptying is detected, the system automatically displays an alarm message.

[0042] This device is equipped with a control system to rationally adjust the logic of the sampling pump start and stop, suction pump, and venting device, so as to realize data detection of different points by a single nitrate nitrogen meter, reduce the number of online nitrate nitrogen meters installed in the biological pool, and save investment costs. This device has a simple equipment structure and an integrated design, with low cost, low energy consumption, small footprint, easy maintenance, and low operating costs.

[0043] The contents not described in detail in this utility model are all prior art.

[0044] The above description is only a preferred embodiment of the present invention and is not limited to the description in the specification and implementation methods. Therefore, any equivalent changes or modifications made based on the structure, features and principles described in the scope of the present invention should be included in the scope of the present invention.

Claims

1. An integrated online nitrate nitrogen instrument sampling device for a sewage treatment plant, comprising a housing (1), a control device (2), a sampling pump (3), a filtering device (4), and a multi-series biological pool (9), characterized in that: The control device (2) is installed in a box (1). A plurality of filter devices (4) are provided at the bottom of the box (1). A plurality of sampling pumps (3) are provided on the outside of the box (1). The sampling pumps (3) are installed at sampling points (10) close to the multi-series biological pools (9). The sampling points (10) are connected to the water inlet of the sampling pump (3) through a sampling water inlet pipe (19). The sampling water outlet pipes (20) of the sampling pumps (3) respectively penetrate into the bottom of the corresponding filter devices (4). The water outlets of the filter devices (4) are respectively connected to the water inlet of the suction pump (5) through a suction pump water inlet pipe (21). The water outlet of the suction pump (5) is communicated with the sampling main pipe (16) through a suction pump water outlet pipe (22). The water outlet of the sampling main pipe (16) is connected to the sampling device (7). The sampling device (7) is connected to an online nitrate nitrogen meter (6).

2. The integrated online nitrate nitrogen instrument sampling device for a sewage treatment plant according to claim 1, characterized in that: The sample injection device (7) comprises a sample injection port (11) for the liquid to be tested, a water flow channel (12), a sample outlet (13) for the liquid to be tested, a fastener (14), and a rotating shaft (15). The water outlet of the sample injection main pipe (16) is connected to the sample injection port (11) for the liquid to be tested via a pipeline. The sample outlet pipe (17) for the liquid to be tested at the sample outlet (13) is connected to the overflow pipe and the drain pipe of the filter device (4) and to the drain pipe (18).

3. The integrated online nitrate nitrogen instrument sampling device for a sewage treatment plant according to claim 2, characterized in that: The sample introduction device (7) is made of rubber or latex, and a water flow channel (12) is arranged inside. The water flow channel (12) passes through the sensor detection port of the online nitrate nitrogen meter (6) and is connected to it.

4. The integrated online nitrate nitrogen instrument sampling device for a sewage treatment plant according to claim 1, characterized in that: There are at least two or more sampling pumps (3), the number of the sampling points (10) is consistent with the number of the sampling pumps (3), and the number of the filtering devices (4) and the suction pumps (5) is also consistent with the number of the sampling pumps (3).

5. The integrated online nitrate nitrogen instrument sampling device for a sewage treatment plant according to claim 1, characterized in that: The filtering device (4) is internally installed with an MBR membrane assembly for filtration, and a liquid level meter (8) is installed on the top. An emptying device is installed at the bottom of the filtering device (4), and an aeration device is installed at the bottom of the MBR membrane assembly.

6. The integrated online nitrate nitrogen instrument sampling device for a sewage treatment plant according to claim 1, characterized in that: The box body (1) is a cubic structure and is made of carbon steel or 304 stainless steel. A ventilation hole is provided on the box body (1).

7. The integrated online nitrate nitrogen instrument sampling device for a sewage treatment plant according to claim 1, characterized in that: The flow rate of the suction pump (5) is 1 to 4 L / min.

8. The integrated online nitrate nitrogen instrument sampling device for a sewage treatment plant according to any one of claims 1 to 7, characterized in that: The pipelines in the integrated online nitrate nitrogen instrument sampling device are all made of UPVC or 304 stainless steel, and the pipelines located outside the box (1) are insulated.

9. The integrated online nitrate nitrogen instrument sampling device for a sewage treatment plant according to any one of claims 1 to 7, characterized in that: The control system of the control device (2) is integrated with the upper computer software using a PLC. The control device collects data from the sampling pump (3), the venting device, the aeration device, the suction pump (5), the liquid level meter (8), and the online nitrate nitrogen meter (6), and outputs instructions.

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