Cyanide water quality on-line monitor

Abstract

The cyanide water quality on-line monitor comprises a metering chamber, a condensing chamber and a measuring chamber. The lower end of the metering chamber is connected with a fourteen-way valve, and the upper end of the metering chamber is connected with a metering pump; one end of the condensation chamber is connected to the distillation chamber; one end of the distillation chamber is connected to the fourteen-way valve; the lower end of the measuring chamber is connected to the fourteen-way valve, and the upper end of the measuring chamber is connected to the condensing chamber and further connected with a three-way valve which is provided with an absorption liquid pipe and an air pipe. The condensation chamber comprises a cooling pipe, the cooling pipe is installed in an outer cover, the outer cover is installed in the instrument shell, a cooling fan is arranged on the back of the outer cover, the cooling pipe is filled with cooling liquid and provided with a spiral pipeline, two connectors of the pipeline penetrate out of the upper end and the lower end of the cooling pipe respectively, and the connector located on the upper portion is connected with the distillation chamber. And the lower interface is connected with the measuring chamber. And continuous monitoring can be carried out under the condition of dynamic change, so that cyanide leakage is avoided while the monitoring efficiency is improved, and relatively high practicability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality monitoring, in particular to an online cyanide water quality monitor. Background Art

[0002] Cyanide is a highly toxic substance, especially in water. If a large amount of cyanide enters the human body, it will be toxic to the nervous system, causing headaches, breathing difficulties, coma and even death. The significance of measuring cyanide in water lies mainly in environmental protection, food safety, public health and industrial supervision. It is of great value to protecting the environment and human health.

[0003] Traditional manual analysis methods involve cumbersome and time-consuming steps from water sample collection, preparation, to analysis. They are prone to poisoning due to hydrogen cyanide leakage caused by improper operation of the experimenter. Therefore, they require a high level of technical expertise from the experimenter and have relatively high labor costs. Furthermore, the analysis process is also affected by various factors, such as improper operation, measurement errors, and misjudgment, which can lead to a decrease in the accuracy of the analysis results. Utility Model Content

[0004] In response to the deficiencies of the above-mentioned related existing technologies, the present application provides an online cyanide water quality monitor that can continuously monitor under dynamic changes, improve monitoring efficiency while also avoiding cyanide leakage, and has strong practicality.

[0005] In order to achieve the above purpose, the utility model adopts the following technologies:

[0006] A cyanide water quality online monitor comprises a metering chamber, a condensation chamber and a measuring chamber.

[0007] The lower end of the metering chamber is connected to the fourteen-way valve, and the upper end is connected to the metering pump, and an air pipe is provided at one end of the metering pump; one end of the condensation chamber is connected to the distillation chamber, and one end of the distillation chamber is connected to the fourteen-way valve; the lower end of the measuring chamber is connected to the fourteen-way valve, and the upper end is connected to the condensation chamber, and the upper end is also connected to the three-way valve, and the three-way valve is provided with an absorption liquid pipe and an air pipe.

[0008] Furthermore, the condensation chamber includes a cooling pipe, which is installed in the outer cover, which is installed in the instrument housing, and a cooling fan is provided on the back. The cooling pipe is filled with coolant and is provided with a spiral pipe. The two interfaces of the pipe pass through the upper and lower ends of the cooling pipe respectively. The upper interface is connected to the distillation chamber, and the lower interface is connected to the measuring chamber.

[0009] Furthermore, a through hole is provided at both the upper and lower ends of the outer cover, a fixing block is provided on one side of the through hole, a groove is provided on the side of the fixing block close to the center of the through hole, the cooling pipe fits in the groove, a fixing hoop is provided on one side of the fixing block for locking the cooling pipe, and the end of the cooling pipe is aligned with the through hole.

[0010] Furthermore, the metering pump is a peristaltic pump, and an air buffer zone is provided between the metering pump and the metering chamber.

[0011] Furthermore, two photoelectric liquid level sensors are provided on both sides of the metering chamber in the vertical direction.

[0012] Furthermore, the distillation chamber and the measuring chamber are both quartz glass tubes, and are provided with heating wires and temperature sensors inside, a cooling fan on the back, and light transmitters and light receivers on both sides of the measuring chamber.

[0013] The beneficial effects of the utility model are as follows: through the cooperation of the metering chamber, the fourteen-way valve and other components, the cyanide in the water sample can be continuously monitored at a higher frequency, and it is ensured that the monitoring will not be interrupted in the case of dynamic changes; moreover, the professional level of the operator is not required to be high, thereby reducing the labor cost and the risk of interference from human factors; a three-way valve is connected to the measuring chamber, and a pipe of the three-way valve is connected to the absorption liquid, thereby avoiding the leakage of cyanide during the analysis process and improving the safety of the work. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.

[0015] Figure 1 This is a schematic diagram of the overall structural route distribution of an embodiment of the present application.

[0016] Figure 2 This is a three-dimensional schematic diagram of the condensation chamber of an embodiment of the present application.

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the cooling pipe according to an embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention are described in detail below with reference to the accompanying drawings. However, the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] like Figure 1-Figure 3 As shown, this example provides a cyanide water quality online monitor, including: a metering chamber 1, a condensation chamber 2, and a measuring chamber 3.

[0020] The lower end of the metering chamber 1 is connected to the fourteen-way valve 11, which reduces the intermediate connecting pipelines, reduces liquid residue and interference, and facilitates maintenance and replacement. The upper end is connected to the metering pump 12, and an air pipe is provided at one end of the metering pump 12; one end of the condensation chamber 2 is connected to the distillation chamber 4, and one end of the distillation chamber 4 is connected to the fourteen-way valve 11; the lower end of the measuring chamber 3 is connected to the fourteen-way valve 11, and the upper end is connected to the condensation chamber 2, and the upper end is also connected to the three-way valve 31, the three-way valve 31 is provided with an absorption liquid pipe and an air pipe, and one end of the absorption liquid pipe is located in the absorption liquid.

[0021] Specifically, the condensation chamber 2 includes a cooling pipe 21, which is installed in an outer cover 22, which is installed in the instrument housing. The outer cover 22 provides protection for the cooling pipe 21, and a cooling fan is provided on the back to accelerate heat dissipation. The cooling pipe 21 is filled with coolant and is provided with a spiral pipe 23. The two interfaces of the pipe 23 pass through the upper and lower ends of the cooling pipe 21 respectively. The upper interface is connected to the distillation chamber 4, and the lower interface is connected to the measuring chamber 3. The pipe 23 is used to guide and cool the hydrogen cyanide liquid distilled in the distillation chamber 4 to the measuring chamber 3, and a small hole is opened at the upper end of the cooling pipe 21 for adding coolant.

[0022] Specifically, a through hole 24 is provided at both the upper and lower ends of the outer cover 22, a fixing block 25 is provided on one side of the through hole 24, and a groove is provided on the side of the fixing block 25 close to the center of the through hole 24, and the cooling pipe 21 fits in the groove. A fixing hoop 26 is provided on one side of the fixing block 25 for locking the cooling pipe 21, and the end of the cooling pipe 21 is aligned with the through hole 24, so as to facilitate the disassembly of the cooling pipe 21.

[0023] Specifically, the metering pump 12 is a peristaltic pump, which provides a power source for the metering chamber 1 by squeezing the air in the pump tube, and can measure water samples and reagents. Different metering flow rates can be achieved by selecting the metering hose and pump speed, and the peristaltic pump can be controlled to rotate forward and reverse and fast and slow. An air buffer zone 13 is provided between the metering pump 12 and the metering chamber 1 to avoid corrosion of the pump tube.

[0024] Specifically, there are a total of fourteen pipelines on the fourteen-way valve 11, namely a water sample tube, an offline tube, five reagent tubes, two wastewater tubes, a standard liquid verification tube, a volume standard tube, and a zero standard tube. The remaining two pipelines are respectively connected to the distillation chamber 4 and the measuring chamber 3. By switching the fourteen-way valve 11, switching between different water sample channels, reagents, calibration liquids, etc. can be achieved.

[0025] Specifically, two photoelectric liquid level sensors are provided on both sides of the metering chamber 1 in the vertical direction to achieve accurate metering of the reagent.

[0026] Specifically, the distillation chamber 4 and the measuring chamber 3 are both quartz glass tubes, and are equipped with heating wires and temperature sensors inside, and a cooling fan on the back. The reagents and water samples are mixed in a certain proportion in the distillation chamber 4, and are heated at a constant temperature to dissociate the complex cyanide in the water sample into cyanide ions, which react with the phosphoric acid in the reagent to form cyanic acid, which is further hydrolyzed into hydrogen cyanide in water; the distillate is constant in volume, the chemical reaction of the relevant reagents and the colorimetric process are all carried out in the measuring chamber 3. A light emitter 32 and a light receiver 33 are respectively provided on both sides of the measuring chamber 3. The light emitter 32 is the light source, and the light receiver 33 is the light receiver for colorimetric measurement.

[0027] The specific implementation is described as follows:

[0028] The metering pump 12 is controlled to rotate forward to generate negative pressure, and the valve port of the fourteen-way valve 11 is switched to the water sample, and the water sample will be pumped into the metering chamber 1. When the liquid level is at the high and low liquid levels, the metering pump 12 stops rotating to complete the metering of a certain volume of the water sample. The metering pump 12 is then reversed, and the valve port of the fourteen-way valve 11 is switched to the distillation chamber 4, and the water sample will be discharged into the distillation chamber 4. Then, using the same metering method, a certain amount of sodium hydroxide solution is first metered into the measuring chamber 3, and then phosphoric acid and disodium EDTA solutions are metered into the distillation chamber 4. Start the distillation chamber 4 and heat it to 100°C. Turn on the reverse direction of the metering pump 12 and slowly blow air into the distillation chamber 4 to distill the dissociated cyanide ions as hydrogen cyanide. The reaction formula is as follows: H3PO4+CN − →H2PO4 − +HCN and is absorbed by the sodium hydroxide solution in measurement chamber 3 according to the following reaction: HCN + NaOH → NaCN + H2O. When the volume of distillate collected in measurement chamber 3 reaches the preset level, heating of distillation chamber 4 and aeration of metering pump 12 are stopped. Buffer solution, chloramine T solution, and isonicotinic acid-barbituric acid solution are then sequentially added to measurement chamber 3. Measurement chamber 3 is then opened and heated to a constant temperature of 30°C. A color development reaction is carried out for 10 minutes. Colorimetry is then performed using light emitter 32 and light receiver 33 to measure the absorbance of the solution. Using a pre-calibrated standard curve, the cyanide content in the water sample is then determined.

[0029] Since the above are only preferred embodiments of the present invention and are not intended to limit the present invention, it is obvious that those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Therefore, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A cyanide water quality online monitor, characterized in that, include: A metering chamber (1) is connected to a fourteen-way valve (11) at its lower end and to a metering pump (12) at its upper end, wherein an air pipe is provided at one end of the metering pump (12); A condensation chamber (2) is connected at one end to the distillation chamber (4), and one end of the distillation chamber (4) is connected to the fourteen-way valve (11); The measuring chamber (3) has a lower end connected to the fourteen-way valve (11), an upper end connected to the condensation chamber (2), and an upper end further connected to a three-way valve (31), wherein the three-way valve (31) is provided with an absorption liquid pipe and an air pipe.

2. The cyanide water quality online monitor according to claim 1, wherein The condensation chamber (2) includes a cooling pipe (21), the cooling pipe (21) is installed in an outer cover (22), the outer cover (22) is installed in the instrument housing, and a cooling fan is provided on the back. The interior of the cooling pipe (21) is filled with coolant and is provided with a spiral pipe (23). The two interfaces of the pipe (23) pass through the upper and lower ends of the cooling pipe (21) respectively, the upper interface is connected to the distillation chamber (4), and the lower interface is connected to the measuring chamber (3).

3. The cyanide water quality online monitor according to claim 2, wherein The outer cover (22) is provided with a through hole (24) at both the upper and lower ends, a fixing block (25) is provided on one side of the through hole (24), a groove is provided on one side of the fixing block (25) close to the center of the through hole (24), the cooling pipe (21) is fitted in the groove, a fixing hoop (26) is provided on one side of the fixing block (25) for locking the cooling pipe (21), and the end of the cooling pipe (21) is aligned with the through hole (24).

4. The cyanide water quality online monitor according to claim 1, wherein The metering pump (12) is a peristaltic pump, and an air buffer zone (13) is provided between the metering pump (12) and the metering chamber (1).

5. The cyanide water quality online monitor according to claim 1, wherein Two photoelectric liquid level sensors are provided on both sides of the metering chamber (1) in the vertical direction.

6. The cyanide water quality online monitor according to claim 1, wherein The distillation chamber (4) and the measuring chamber (3) are both quartz glass tubes, and are provided with heating wires and temperature sensors inside, and a cooling fan is provided on the back. A light transmitter (32) and a light receiver (33) are also provided on both sides of the measuring chamber (3).

Images