CN219608831U - Biochemical oxygen demand measuring device stable in detection and easy to clean - Google Patents
Biochemical oxygen demand measuring device stable in detection and easy to clean Download PDFInfo
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- CN219608831U CN219608831U CN202223228509.0U CN202223228509U CN219608831U CN 219608831 U CN219608831 U CN 219608831U CN 202223228509 U CN202223228509 U CN 202223228509U CN 219608831 U CN219608831 U CN 219608831U
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- reaction tank
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- oxygen electrode
- oxygen demand
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The utility model relates to a biochemical oxygen demand device which is stable in detection and easy to clean, comprising a reaction tank, wherein the inner wall of the reaction tank is coated with a Teflon coating; an oxygen electrode fixing hole forming an angle of 45 degrees with the side wall surface is formed in one side wall of the reaction tank, and an oxygen electrode is placed in the oxygen electrode fixing hole; the other side walls of the reaction tank are also provided with liquid level switch interfaces, aeration pump interfaces and the like. Because the dissolved oxygen electrode is needed to be used in the BOD detection process and is in an air saturated aqueous solution, bubbles are easy to form in the process to interfere BOD measurement, the biochemical oxygen demand measurement device of the utility model ensures that the oxygen electrode is obliquely placed at 45 degrees by arranging the oxygen electrode fixing hole which forms an angle of 45 degrees with the side wall surface on the side wall of the reaction tank, thus being beneficial to smoothly discharging formed bubbles and ensuring the accuracy of detected dissolved oxygen value data; and the Teflon coating is coated on the inner wall of the reaction tank, so that the reaction tank is convenient to clean.
Description
Technical Field
The utility model relates to the technical field of biochemical oxygen demand detection, in particular to a biochemical oxygen demand measuring device which is stable in detection and easy to clean.
Background
Biochemical Oxygen Demand (BOD) is a comprehensive indicator of the oxygen consumption of microorganisms in a large amount of water to degrade pollutants. The obtained dissolved oxygen value is a key factor for detecting BOD, the dissolved oxygen value of the water sample is respectively measured for the water sample entering and exiting, and the obtained difference value is the biochemical oxygen demand of the water sample. The dissolved oxygen value is obtained in the BOD detection process based on a flowing system, and the dissolved oxygen value of the water sample to be detected is detected by utilizing a dissolved oxygen electrode. However, in the existing BOD detection technology, most of the dissolved oxygen electrode placement modes are vertically placed in the detection device, and the placement modes can cause that the water sample to be detected is easy to generate bubbles when flowing through the dissolved oxygen electrode, so that the detected dissolved oxygen value data is inaccurate, the biochemical oxygen demand value of the water sample to be detected is affected, the quality of the water body is not easy to evaluate, and the self-repairing capability of the water body cannot be well measured. Meanwhile, the existing BOD detection device is very easy to remain dirt of some sewage and wastewater inside the device because of long-time detection of sewage and various industrial wastewater, so that the device is difficult to clean and the detection result is influenced.
Disclosure of Invention
The utility model aims to solve the technical problems in the prior art and provides a biochemical oxygen demand measuring device which is stable in detection and easy to clean.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
the utility model provides a biochemical oxygen demand device which is stable in detection and easy to clean, comprising a reaction tank, wherein the inner wall of the reaction tank is coated with a Teflon coating;
an oxygen electrode fixing hole forming an angle of 45 degrees with the side wall surface is formed in one side wall of the reaction tank, and an oxygen electrode is placed in the oxygen electrode fixing hole;
a liquid level switch interface and an aeration pump interface are arranged on the second side wall of the reaction tank, the liquid level switch interface is connected with a liquid level detection switch, and the aeration pump interface is connected with an aeration pump through a pipe;
a first water sample inlet to be detected, a tap water inlet hole, a second water sample inlet to be detected and an oxygen electrode water outlet hole are formed in the third side wall of the reaction tank, the first water sample inlet to be detected and the second water sample inlet to be detected are respectively connected with a power device so as to inject solution into an internal flow path of the reaction tank, the tap water inlet hole is connected with a water injection device through a pipeline so as to select tap water to be injected, and the oxygen electrode water outlet hole is used for extracting the solution into a wastewater barrel through the power device;
a first temperature sensor interface, a two-position three-way valve interface and a second temperature sensor interface are arranged on the fourth side wall of the reaction tank, and a temperature sensor, a two-position three-way valve and a temperature sensor are respectively arranged on the fourth side wall of the reaction tank;
the water bath water-saving device is characterized in that a water bath protective cover is arranged on the upper end cover of the reaction tank, a water sample drain hole to be detected is arranged under the water bath protective cover, a fixing clamp is arranged on the inner wall of the water bath water-saving device, a microbial film parasitic pipeline is fixed on the fixing clamp, and a heating pipe is also arranged in the reaction tank and used for controlling the temperature required by BOD detection;
when the biochemical oxygen demand measuring device starts to work, a control system of the measuring device controls a tap water inlet to selectively inject tap water, and when a liquid level detection switch connected with a liquid level switch interface detects liquid, water injection is stopped; after water injection is stopped, the control system controls the heating pipe to heat and keep constant temperature, and meanwhile, the aeration pump connected with the interface of the aeration pump starts to work, so that all solutions in the reaction tank are at the same temperature; a signal conditioning circuit and an AD conversion circuit are arranged between the temperature sensor and a control system of the measuring device, the temperature read by the temperature sensor can be received only after passing through the signal conditioning circuit and the AD conversion circuit, the control system reads the temperature of a temperature probe of the temperature sensor connected with a first temperature sensor interface and a second temperature sensor interface, the temperatures read by the two temperature probes can be mutually verified, and the accuracy of temperature reading is ensured;
one end of the oxygen electrode is connected with a main path of a two-position three-way valve connected with the two-position three-way valve interface, one of the other two paths of the two-position three-way valve is connected with one end of the microbial film parasitic pipeline, and the other path of the two paths of the two-position three-way valve is arranged in a reaction tank; the other end of the microbial film parasitic pipeline is arranged in the reaction tank, at the moment, the solution in the microbial film parasitic pipeline is extracted to the wastewater barrel through the oxygen electrode water outlet by the power device, and the solution is injected into the reaction tank by the power device connected with the first water sample water inlet to be tested and the second water sample water inlet to be tested, so that the dynamic balance of the solution in the reaction tank is ensured; finally, the control system reads and calculates the oxygen electrode; after the flow is finished, the control system opens a switch valve connected into a water sample drain hole to be detected to drain water.
In the above technical scheme, still be provided with first reservation device hole, light interface and second reservation device hole on the second lateral wall of reaction tank, first reservation device hole and second reservation device hole are the hole site reserved for other auxiliary function of follow-up increase respectively, the light interface has connect the LED lamp, is opened by control system when the reaction tank needs to clear up the operation.
In the above technical scheme, two fixing clips are arranged on each inner wall of the reaction tank.
In the technical scheme, the microbial film parasitic pipeline is a hose made of polyethylene material, and the length and the shape of the hose can be adjusted according to requirements.
In the technical scheme, the power devices are peristaltic pumps.
In the above technical solution, the temperature sensor is a PT100 temperature sensor.
In the above technical scheme, the voltage of the two-position three-way valve is 12V.
In the technical scheme, the control system is an STM32F103RCT6 singlechip.
The beneficial effects of the utility model are as follows:
the BOD detection process needs to use a dissolved oxygen electrode, and bubbles are easy to form in an air saturated aqueous solution to interfere BOD measurement.
The biochemical oxygen demand measuring device which is stable in detection and easy to clean is convenient to clean by coating the Teflon coating on the inner wall of the reaction tank.
The biochemical oxygen demand measuring device which is stable in detection and easy to clean disclosed by the utility model has the advantages that the bottom aeration pump is used for uniformly mixing water samples, and the temperature consistency of the water samples at all positions is ensured.
The biochemical oxygen demand measuring device which is stable in detection and easy to clean is obtained by circularly culturing intrinsic microorganisms in a water sample to be detected in a section of blank pipeline by using a microbial film reactor. The microbial film reactor is fixed through setting up round mount on the device inner wall, and reasonable design is done to the parasitic pipeline length of microbial film and pipe diameter that such design is adjustable according to actual water sample characteristics, simultaneously, this structural design is convenient for microbial film normal position cultivate, and detection device's washing, maintenance and inspection, and the microbial film dismantles simply.
Drawings
The utility model is described in further detail below with reference to the drawings and the detailed description.
FIG. 1 is a schematic view of an angle of the biochemical oxygen demand device of the present utility model for detecting stable and easy-to-clean biochemical oxygen demand.
FIG. 2 is a schematic view of another angle of the biochemical oxygen demand device of the present utility model for detecting stable and easy-to-clean biochemical oxygen demand.
FIG. 3 is a schematic view showing the internal structure of the biochemical oxygen demand device of the present utility model at an angle for detecting stable and easy-to-clean biochemical oxygen demand.
FIG. 4 is a schematic view showing another angular internal structure of the biochemical oxygen demand device for detecting stable and easy cleaning according to the present utility model.
Reference numerals in the drawings denote:
the water-bath water-saving device comprises a 1-reaction tank, a 2-oxygen electrode fixing hole, a 3-water-bath protective cover, a 4-liquid level switch interface, a 5-first reserved device hole, a 6-lighting lamp interface, a 7-aeration pump interface, an 8-second reserved device hole, a 9-water sample drain hole to be tested, a 10-first temperature sensor interface, an 11-two-position three-way valve interface, a 12-second temperature sensor interface, a 13-first water sample water inlet to be tested, a 14-tap water inlet, a 15-second water sample water inlet to be tested, a 16-oxygen electrode water outlet hole and a 17-fixing clamp.
Detailed Description
The present utility model will be described in detail with reference to fig. 1 to 4.
The utility model provides a biochemical oxygen demand device which is stable in detection and easy to clean, comprising a reaction tank 1, wherein the inner wall of the reaction tank is coated with a Teflon (polytetrafluoroethylene) coating;
an oxygen electrode fixing hole 2 forming an angle of 45 degrees with the side wall surface is formed in one side wall of the reaction tank 1, and an oxygen electrode is placed in the oxygen electrode fixing hole 2; a liquid level switch interface 4, a first reserved device hole 5, an illuminating lamp interface 6, an aeration pump interface 7 and a second reserved device hole 8 are arranged on the second side wall of the reaction tank 1, the liquid level switch interface 4 is connected with a liquid level detection switch, and the aeration pump interface 7 is connected with an aeration pump through a pipe; the first reserved device hole 5 and the second reserved device hole 8 are reserved hole positions for adding other auxiliary functions later, the illuminating lamp interface 6 is connected with an LED lamp, and the LED lamp is opened by a control system when the reaction tank 1 needs to be cleaned; a first water sample inlet 13 to be detected, a tap water inlet 14, a second water sample inlet 15 to be detected and an oxygen electrode water outlet 16 are arranged on the third side wall of the reaction tank 1, the first water sample inlet 13 to be detected and the second water sample inlet 15 to be detected are respectively connected with peristaltic pumps so as to inject solution into an internal flow path of the reaction tank 1, the tap water inlet 14 is connected with a water injection device through a pipeline so as to selectively inject tap water, and the oxygen electrode water outlet 16 is used for pumping the solution to a wastewater barrel through the peristaltic pumps; a first temperature sensor interface 10, a two-position three-way valve interface 11 and a second temperature sensor interface 12 are arranged on the fourth side wall of the reaction tank 1, a temperature sensor, a two-position three-way valve and a temperature sensor are respectively arranged, the temperature sensor is a PT100 temperature sensor, and the voltage of the two-position three-way valve is 12V. The upper end of the reaction tank 1 is provided with a water bath protective cover 3, a water sample drain hole 9 to be detected is arranged under the water bath protective cover, two fixing clamps 17 are arranged on each inner wall, a microbial film parasitic pipeline is fixed on each fixing clamp 17, the microbial film parasitic pipeline is a hose made of polyethylene materials, and a heating pipe (not shown in the figure) is also arranged in the reaction tank 1 and used for controlling the temperature (about 36.8-37.2 ℃) required by BOD detection;
when the biochemical oxygen demand measuring device starts to work, a control system of the measuring device controls a tap water inlet 14 to selectively inject tap water, and when a liquid level detection switch connected with a liquid level switch interface 4 detects liquid, water injection is stopped; after water injection is stopped, the control system controls the heating pipe to heat and keep constant temperature, and meanwhile, the aeration pump connected with the aeration pump interface 7 starts to work, so that the solutions at all positions of the reaction tank 1 are at the same temperature; a signal conditioning circuit and an AD conversion circuit (the signal conditioning circuit and the AD conversion circuit are realized through a PT100 resistance temperature measurement module with a MAX31865 chip, the working voltage is 12V), the temperature read by the temperature sensor can be received only after passing through the signal conditioning circuit and the AD conversion circuit, the temperature of the temperature probes of the temperature sensor connected with the first temperature sensor interface 10 and the second temperature sensor interface 12 can be read by the control system, and the temperatures read by the two temperature probes can be mutually verified, so that the accuracy of temperature reading is ensured;
one end of the oxygen electrode is connected with a main path of the two-position three-way valve connected with the two-position three-way valve interface 11, and one of the other two paths of the two-position three-way valve is connected with one end of the microbial membrane parasitic pipeline, and the other path of the two paths of the two-position three-way valve is arranged in the reaction tank 1; the other end of the microbial film parasitic pipeline is arranged in the reaction tank 1, at the moment, the solution in the microbial film parasitic pipeline is pumped into a wastewater barrel through a peristaltic pump by the oxygen electrode water outlet 16, and the solution is injected into the reaction tank 1 by a power device connected with the first water sample water inlet 13 to be tested and the second water sample water inlet 15 to be tested, so that the dynamic balance of the solution in the reaction tank 1 is ensured; finally, the control system reads and calculates the oxygen electrode; after the flow is finished, the control system opens a switch valve connected to the water sample drain hole 9 to be tested to drain water. The control system is an STM32F103RCT6 singlechip.
In summary, the biochemical oxygen demand measuring device which is stable in detection and easy to clean disclosed by the utility model has the advantages that the oxygen electrode fixing holes which form an angle of 45 degrees with the side wall surface are formed in the side wall of the reaction tank, so that the oxygen electrode is obliquely placed at 45 degrees, the formed bubbles can be smoothly discharged, and the accuracy of the detected dissolved oxygen value data is ensured.
The biochemical oxygen demand measuring device which is stable in detection and easy to clean is convenient to clean by coating the Teflon coating on the inner wall of the reaction tank.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.
Claims (8)
1. The biochemical oxygen demand measuring device which is stable in detection and easy to clean is characterized by comprising a reaction tank (1), wherein the inner wall of the reaction tank is coated with a Teflon coating;
an oxygen electrode fixing hole (2) forming an angle of 45 degrees with the side wall surface is formed in one side wall of the reaction tank (1), and an oxygen electrode is placed in the oxygen electrode fixing hole (2);
a liquid level switch interface (4) and an aeration pump interface (7) are arranged on the second side wall of the reaction tank (1), the liquid level switch interface (4) is connected with a liquid level detection switch, and the aeration pump interface (7) is connected with an aeration pump through a pipe;
a first water sample inlet (13) to be detected, a tap water inlet (14), a second water sample inlet (15) to be detected and an oxygen electrode water outlet (16) are arranged on the third side wall of the reaction tank (1), the first water sample inlet (13) to be detected and the second water sample inlet (15) to be detected are respectively connected with a power device to inject solution into an internal flow path of the reaction tank (1), the tap water inlet (14) is connected with a water injection device through a pipeline to select tap water injection, and the oxygen electrode water outlet (16) is used for pumping the solution to a wastewater barrel through the power device;
a first temperature sensor interface (10), a two-position three-way valve interface (11) and a second temperature sensor interface (12) are arranged on the fourth side wall of the reaction tank (1), and a temperature sensor, a two-position three-way valve and a temperature sensor are respectively arranged on the fourth side wall;
the water-bath water-saving device is characterized in that a water-bath protective cover (3) is arranged on the upper end cover of the reaction tank (1), a water sample drain hole (9) to be detected is arranged under the water-bath protective cover, a fixing clamp (17) is arranged on the inner wall of the water-bath water-saving device, a microbial film parasitic pipeline is fixed on the fixing clamp (17), and a heating pipe is further arranged in the reaction tank (1) and used for controlling the temperature required by BOD detection;
a signal conditioning circuit and an AD conversion circuit are arranged between the temperature sensor and a control system of the measuring device, and the temperature read by the temperature sensor can be received by the control system after passing through the signal conditioning circuit and the AD conversion circuit;
one end of the oxygen electrode is connected with a main path of a two-position three-way valve connected with the two-position three-way valve connector (11), one of the other two paths of the two-position three-way valve is connected with one end of the microbial membrane parasitic pipeline, and the other path of the two paths of the two-position three-way valve is arranged in the reaction tank (1); the other end of the microbial film parasitic pipeline is arranged in the reaction tank (1).
2. The biochemical oxygen demand measurement device according to claim 1, wherein a first reserved device hole (5), an illuminating lamp interface (6) and a second reserved device hole (8) are further arranged on the second side wall of the reaction tank (1), the first reserved device hole (5) and the second reserved device hole (8) are reserved hole sites respectively, the illuminating lamp interface (6) is connected with an LED lamp, and the control system is used for opening the reaction tank (1) when cleaning operation is needed.
3. Biochemical oxygen demand measuring device according to claim 1, characterized in that two fixing clips (17) are provided on each inner wall of the reaction cell (1).
4. A biochemical oxygen demand measurement device according to any one of claims 1 to 3 wherein the microbial film parasitic piping is a hose of polyethylene material.
5. The biochemical oxygen demand measurement device according to claim 4, wherein the power devices are peristaltic pumps.
6. The biochemical oxygen demand measurement device according to claim 4, wherein the temperature sensor is a PT100 temperature sensor.
7. The biochemical oxygen demand measurement device according to claim 4, wherein the voltage of the two-position three-way valve is 12V.
8. The biochemical oxygen demand measurement device according to claim 4, wherein the control system is an STM32F103RCT6 single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223228509.0U CN219608831U (en) | 2022-12-03 | 2022-12-03 | Biochemical oxygen demand measuring device stable in detection and easy to clean |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223228509.0U CN219608831U (en) | 2022-12-03 | 2022-12-03 | Biochemical oxygen demand measuring device stable in detection and easy to clean |
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| Publication Number | Publication Date |
|---|---|
| CN219608831U true CN219608831U (en) | 2023-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223228509.0U Active CN219608831U (en) | 2022-12-03 | 2022-12-03 | Biochemical oxygen demand measuring device stable in detection and easy to clean |
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| Country | Link |
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| CN (1) | CN219608831U (en) |
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2022
- 2022-12-03 CN CN202223228509.0U patent/CN219608831U/en active Active
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