Wastewater discharge sampling and monitoring device

Abstract

The utility model discloses a waste water discharge sampling monitoring device in the technical field of water quality monitoring, which comprises a sewage discharge pipeline led out from a waste water treatment facility, a monitoring sampling bypass is communicated with the sewage discharge pipeline, and a sampling pump and a water quality monitoring instrument assembly are sequentially connected in series on the monitoring sampling bypass. The water quality monitoring instrument assembly is externally connected to a data acquisition instrument, a two-position three-way valve is connected to the downstream of the monitoring instrument assembly on the monitoring sampling bypass, one outlet of the two-position three-way valve is connected to a blow-off pipeline through a return pipeline, and the other outlet of the two-position three-way valve is connected to a sample storage container through a sample storage pipeline; a flow sensor and a first stop valve are sequentially arranged on the blow-off pipeline and positioned at the downstream of the return pipeline of the two-position three-way valve in series; a substandard discharge pipeline and a substandard sewage tank are arranged on the sewage discharge pipeline in a communicating manner, and substandard samples can be temporarily stored, so that a management end can conveniently send and recheck the substandard samples; in addition, substandard sewage can be transferred and discharged, and influence on operation of a whole upstream pipeline system is avoided.

Description

Technical Field

[0001] The utility model relates to a wastewater discharge sampling monitoring device, belonging to the technical field of water quality monitoring. Background Art

[0002] Wastewater refers to water that is discharged during a process of industrial production or daily life and is useless to the process. This water may contain various pollutants, including organic matter, inorganic matter, heavy metals, radioactive substances, etc., and needs to be properly treated before it can be discharged or reused. Since a large amount of wastewater is discharged during the production process, this is the cause of water pollution. Because of this, online monitoring of wastewater quality has become an important project for various companies.

[0003] The traditional wastewater discharge monitoring system is relatively simple. Generally, a sampling instrument is directly installed on the sewage pipeline, and the sampling instrument is connected to various water quality analyzers. The analysis results are transmitted and fed back to the management end in the form of data electrical signals. Although this discharge monitoring system can complete water quality monitoring and feedback work, in actual application, since the system adopts intermittent continuous sampling and monitoring work, samples are taken every few minutes, and after the analysis and detection are completed, the samples are directly discharged. In this way, when the management end receives water quality test results that do not meet the standards, it is impossible to retain the substandard samples for reporting and re-inspection. In addition, the existing water quality monitoring system only has a monitoring function. Even if water quality problems are found, it can only prevent illegal discharge by shutting off the main valve of the discharge pipeline to interrupt the sewage discharge, thereby indirectly affecting the operation of the entire upstream pipeline system. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides a wastewater discharge sampling monitoring device.

[0005] The technical solution of the utility model is as follows:

[0006] A wastewater discharge sampling monitoring device, comprising a sewage discharge pipeline leading out of a wastewater treatment facility, the sewage discharge pipeline being connected with a monitoring sampling bypass, the monitoring sampling bypass being sequentially connected with a sampling pump and a water quality monitoring instrument component, the water quality monitoring instrument component being externally connected to a data acquisition instrument, the monitoring sampling bypass being connected with a two-position three-way valve located downstream of the monitoring instrument component, one outlet of the two-position three-way valve being connected to the sewage discharge pipeline through a reflux pipeline, and the other outlet being connected to a sample storage container through a sample storage pipeline;

[0007] A flow sensor and a first stop valve are sequentially connected in series on the return line of the sewage discharge line located downstream of the two-position three-way valve;

[0008] The wastewater discharge sampling and monitoring device also includes a controller;

[0009] The sampling pump, the data acquisition instrument, the two-position three-way valve, the flow sensor and the first stop valve are all electrically connected to the controller respectively.

[0010] As a preferred solution, the water quality monitoring instrument assembly includes a sampler, a total nitrogen analyzer and a COD analyzer, and the total nitrogen analyzer and the COD analyzer are electrically connected to the data acquisition instrument respectively.

[0011] As a preferred solution, a substandard discharge pipeline is provided on the sewage pipeline between the flow sensor and the first stop valve, and a second stop valve is provided in series on the substandard discharge pipeline; the second stop valve is electrically connected to the controller.

[0012] As a preferred solution, the substandard discharge pipeline is connected to a substandard sewage tank, and the substandard sewage tank is connected to a wastewater treatment station through a substandard return pipeline.

[0013] As a preferred solution, a sampling stop valve is provided on the monitoring sampling bypass upstream of the sampling pump, and a check valve is provided on the return line of the two-position three-way valve.

[0014] Beneficial Effects

[0015] 1. The wastewater discharge sampling monitoring device of the utility model adds a sample storage container in the water quality monitoring pipeline. The sample storage container is connected to the reflux pipeline through a two-position three-way valve. The switching of the two-position three-way valve can be indirectly controlled by the test result. During actual work, if the test result of the sample that has completed the test meets the standard, it can be directly refluxed and discharged. If the test result does not meet the standard, it is temporarily stored in the sample storage container by controlling the two-position three-way valve, so as to facilitate the management end to report and re-inspect the samples that do not meet the standard.

[0016] 2. The wastewater discharge sampling and monitoring device of the utility model is provided with a non-standard discharge pipeline and a non-standard sewage tank connected on the sewage pipeline. If the discharged water quality does not meet the standard, there is no need to completely shut down the discharge pipeline to interrupt the discharge. Instead, the non-expressed sewage is temporarily transferred and discharged to the non-standard sewage tank through the control of the pipe valve. After the test results are reviewed and corresponding control measures are taken to restore the standard, it can be switched to normal discharge, thereby avoiding affecting the operation of the entire upstream pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the wastewater discharge sampling and monitoring device of the utility model;

[0018] Figure 2 This is a schematic diagram of the control relationship of the wastewater discharge sampling and monitoring device in this utility model.

[0019] Description of reference numerals:

[0020] Sewage pipeline-10, monitoring sampling bypass-20, sampling stop valve-21, sampling pump-30, water quality monitoring instrument components-40, sampler-41, total nitrogen analyzer-42, COD analyzer-43, two-position three-way valve-50, check valve-51, to sample storage container-60, flow sensor-70, first stop valve-80, controller-90, substandard discharge pipeline-110, second stop valve-120, substandard sewage tank-130, substandard return pipeline-140, data acquisition instrument-100, wastewater treatment facilities-200. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] See also Figure 1-2 A wastewater discharge sampling monitoring device includes a sewage pipe 10 led out of a wastewater treatment facility 200, a monitoring sampling bypass 20 is connected to the sewage pipe 10, a sampling pump 30 and a water quality monitoring instrument assembly 40 are sequentially connected in series on the monitoring sampling bypass 20, a sampling stop valve 21 is arranged on the monitoring sampling bypass 20 upstream of the sampling pump 30, specifically, the water quality monitoring instrument assembly 40 includes a sampler 41, a total nitrogen analyzer 42 and a COD analyzer 43, the sampler 41 is mainly responsible for quantitatively extracting sewage into samples of specified quantities, the total nitrogen analyzer 42 and the COD analyzer 43 are responsible for the total nitrogen index and COD analysis of the sewage respectively, the sampler 41, the total nitrogen analyzer 42 and the COD analyzer 43 are prior art devices The specific working principle of this embodiment is not described in detail; the water quality monitoring instrument component 40 is externally connected to the data acquisition instrument 100, specifically the total nitrogen analyzer 42 and the COD analyzer 43 are externally connected to the data acquisition instrument 100, and the monitoring sampling bypass 20 is located on the downstream of the water quality monitoring instrument component 40. A two-position three-way valve 50 is connected, and one outlet of the two-position three-way valve 50 is connected to the sewage pipeline 10 through a reflux pipeline, and the other outlet is connected to the sample storage container 60 through a sample storage pipeline. A check valve 51 is arranged on the reflux pipeline of the two-position three-way valve 50 to prevent sewage backflow. The sewage that meets the inspection standard is discharged to the sewage pipeline 10 through the reflux pipeline, and the sewage that does not meet the inspection standard is connected to the sample storage container 60 through the sample storage pipeline, which is convenient for the management end to report and re-inspect the substandard samples;

[0024] A flow sensor 70 and a first stop valve 80 are sequentially connected in series on the sewage discharge pipeline 10, which is located downstream of the return pipeline of the two-position three-way valve 50. The flow sensor 70 is used to monitor the water flow in the sewage discharge pipeline 10. When the sewage is discharged normally, the water quality monitoring is started; the first stop valve 80 is used to block the external discharge pipeline when the sewage quality does not meet the standard to avoid illegal discharge;

[0025] The wastewater discharge sampling and monitoring device also includes a controller 90, which can be programmable controlled by, for example, a PLC;

[0026] The sampling pump 30, the data acquisition instrument 100, the two-position three-way valve 50, the flow sensor 70 and the first stop valve 80 are all electrically connected to the controller 90 respectively;

[0027] In actual operation, the flow sensor 70 monitors and determines the flow of sewage in the pipeline, and feeds back the monitoring signal to the controller 90. The controller 90 controls the sampling pump 30 to start, and the sampling stop valve 21 is normally opened in advance to pump the sewage to the sampler 41. The sampler 41 quantitatively extracts the sewage into samples of specified weights, and transports the samples to the total nitrogen analyzer 42 for total nitrogen index detection. After the total nitrogen index detection is completed, the samples are transferred to the COD analyzer 43 for COD analysis. The total nitrogen analyzer 42 and the COD analyzer 43 The analysis data results are transmitted to the data acquisition instrument 100. On the one hand, the data acquisition instrument 100 reports the detection results to the remote management end, and on the other hand, it feeds back the monitoring results to the controller 90 in the form of electrical signals. The controller 90 determines the sample flow direction according to the detection results, and controls the two-position three-way valve 50 to switch the conduction state. When the water quality meets the standard, the reflux pipeline is opened to discharge the sample to the sewage pipeline 10. When the sewage does not meet the standard, the sample storage pipeline is opened and connected to the sample storage container 60, so that the management end can report and re-inspect the substandard samples.

[0028] Example 2

[0029] See also Figure 1-2 On the basis of Example 1, when the water quality is not up to standard and the upstream sewage treatment problem cannot be solved, the main discharge valve can only be shut off, which directly affects the pipeline operation of the entire sewage treatment system, causing it to fall into an interrupted and paralyzed state.

[0030] To this end, in this embodiment, a non-standard discharge pipeline 110 is connected and arranged between the flow sensor 70 and the first stop valve 80 on the sewage pipeline 10, and a second stop valve 120 is arranged in series on the non-standard discharge pipeline 110. The non-standard discharge pipeline 110 is connected to a non-standard sewage tank 130, and the non-standard sewage tank 130 is connected to the wastewater treatment facility 200 through a non-standard return pipeline 140; the second stop valve 120 is electrically connected to the controller 90; the second stop valve 120 is electrically connected to the controller 90;

[0031] In actual operation, when the water quality monitoring instrument component 40 detects that the water quality does not meet the standard, the test result is fed back to the controller 90 through the data acquisition instrument 100, and the controller 90 controls the first stop valve 80 to close and the second stop valve 120 to open, and the substandard sewage is temporarily discharged to the substandard sewage tank 130 through the substandard discharge pipeline 110, and will be sent to the sewage treatment facility for further treatment later; after the test results are reviewed and corresponding control measures are taken to restore the water quality to meet the standard, the controller 90 controls the first stop valve 80 to open and the second stop valve 120 to close, and then switches to normal discharge, thereby avoiding affecting the operation of the entire upstream pipeline system.

[0032] The sewage mentioned above refers to the wastewater discharged by various enterprises.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A wastewater discharge sampling and monitoring device, characterized in that: The invention comprises a sewage discharge pipeline (10) leading out of a wastewater treatment facility (200), the sewage discharge pipeline (10) being connected to a monitoring sampling bypass (20), the monitoring sampling bypass (20) being serially connected to a sampling pump (30) and a water quality monitoring instrument assembly (40), the water quality monitoring instrument assembly (40) being externally connected to a data acquisition instrument (100), the monitoring sampling bypass (20) being connected to a two-position three-way valve (50) downstream of the water quality monitoring instrument assembly (40), one outlet of the two-position three-way valve (50) being connected to the sewage discharge pipeline (10) via a reflux pipeline, and the other outlet of the two-position three-way valve (50) being connected to a sample storage container (60) via a sample storage pipeline; A flow sensor (70) and a first stop valve (80) are sequentially connected in series on the sewage discharge pipeline (10) and located downstream of the return pipeline of the two-position three-way valve (50); The wastewater discharge sampling and monitoring device further comprises a controller (90); The sampling pump (30), the data acquisition instrument (100), the two-position three-way valve (50), the flow sensor (70) and the first stop valve (80) are all electrically connected to the controller (90), respectively.

2. A wastewater discharge sampling monitoring device as claimed in claim 1, characterized in that: The water quality monitoring instrument assembly (40) comprises a sampler (41), a total nitrogen analyzer (42) and a COD analyzer (43); the total nitrogen analyzer (42) and the COD analyzer (43) are electrically connected to the data acquisition instrument (100) respectively.

3. A wastewater discharge sampling and monitoring device as claimed in claim 1, characterized in that: A substandard discharge pipeline (110) is provided on the sewage discharge pipeline (10) and is connected between the flow sensor (70) and the first stop valve (80); a second stop valve (120) is provided in series on the substandard discharge pipeline (110); and the second stop valve (120) is electrically connected to the controller (90).

4. A wastewater discharge sampling monitoring device as claimed in claim 3, characterized in that: The substandard discharge pipeline (110) is connected to a substandard sewage tank (130), and the substandard sewage tank (130) is connected to a wastewater treatment facility (200) via a substandard return pipeline (140).

5. A wastewater discharge sampling and monitoring device as claimed in claim 1, characterized in that: A sampling stop valve (21) is provided on the monitoring sampling bypass (20) upstream of the sampling pump (30), and a check valve (51) is provided on the return pipeline of the two-position three-way valve (50).

Images