A device for detecting cyanide in water

Abstract

The utility model provides a cyanide detection device in water, include: distillation device, including distillation flask and collection bottle, transfer device, including transfer subassembly I and transfer subassembly II, transfer subassembly I includes injection pump II, peristaltic pump I, three way valve and rotary valve I, transfer subassembly II includes rotary valve II, peristaltic pump II, constant displacement pump I and injection pump I, one interface of injection pump I, peristaltic pump II and the export end of constant displacement pump I are connected with the public interface of rotary valve II after parallel, one or more sub -interfaces of rotary valve II are connected with the export end of collection bottle, and one interface of injection pump I is connected with chromogenic device, cyanide detection device in water of the application, from sample injection, distillation, distillate transfer, color development, waste liquid discharge and cleaning, realize full -automatic operation, the detection efficiency and operation safety have been improved significantly, effectively avoid the risk that operator contacts cyanide.

Description

Technical Field

[0001] This utility model relates to a detection device, and more particularly to a cyanide detection device in water. Background Technology

[0002] In the current field of cyanide detection, existing technologies mainly rely on manual operation. While these methods can meet some needs, they have many limitations. First, manual detection methods are susceptible to human factors; for example, differences in operator skill levels can lead to varying test results, limiting the accuracy and reliability of the detection. Second, manual detection is time-consuming, typically requiring significant manpower and time investment, which can greatly reduce detection efficiency in emergency situations. Finally, manual operation also faces health and safety risks; operators must work in hazardous environments, posing a threat to their lives.

[0003] In recent years, automation technology has developed rapidly, and many fields are attempting to apply automated detection systems to improve work efficiency and detection accuracy. However, cyanide detection technology still lags behind in this area. Most existing automated detection systems are limited to applications in other fields, and specialized automated systems for cyanide detection remain scarce. This is mainly because cyanide is highly toxic, placing high demands on detection equipment and the environment. Furthermore, the chemical properties of cyanide require specific treatment methods to ensure accurate detection. Therefore, there is an urgent need to develop a solution that can both automate cyanide detection and reduce the risks of manual operation, thereby improving detection efficiency and accuracy. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a water cyanide detection device that can achieve automated operation, high detection efficiency and good accuracy.

[0005] This utility model provides a device for detecting cyanide in water, comprising: A distillation apparatus, including a distillation flask and a collection bottle disposed at the outlet end of the distillation flask; The transfer device includes a transfer assembly I disposed at the inlet end of a distillation flask and a transfer assembly II disposed at the outlet end of a collection flask; The color development device is connected to the transfer assembly II.

[0006] This application, by setting up a distillation device, a transfer device, and a colorimetric device, can achieve automation, closed-loop operation, and integration of the process, significantly improving the safety, accuracy, efficiency, and convenience of the detection.

[0007] By setting up transfer components I and II, the entire detection process (from sample distillation to distillate collection and then to colorimetric reaction) can be carried out in a closed or semi-closed pipeline, forming a closed operation for detection; this can minimize the chance of laboratory personnel being directly exposed to highly toxic cyanide and strong acid, effectively ensuring the personal safety of operators.

[0008] Furthermore, the distillation apparatus also includes a heating device for heating the distillation flask and a weighing device located at the lower end of the collection flask for weighing. The heating device can precisely control the distillation temperature, avoiding the risk of local overheating or boiling over caused by traditional open flame heating. At the same time, it can be adapted to the system to achieve fully automated detection. The weighing device can monitor the mass change of the distillate in the collection flask in real time, thereby accurately controlling the reaction process and the amount of reagent added, ensuring the accuracy and repeatability of the test results.

[0009] Furthermore, the distillation flask is connected to the collection bottle via an outlet pipe. The outlet pipe is equipped with a clamp valve, which can clamp the outlet pipe and block the connection between the distillation flask and the collection bottle. The clamp valve is equipped with a drive mechanism, such as a motor, cylinder, or electromagnet, which controls the opening and closing of the clamp valve. When the weighing device detects that the collection bottle has reached a threshold, the clamp valve instantly cuts off the connection between the distillation flask and the collection bottle by squeezing the hose. This allows the passage of hydrogen cyanide vapor to be blocked at any time during the distillation process, achieving immediate physical isolation.

[0010] Furthermore, the collection bottle has a sealed structure, which ensures zero leakage of distilled vapors, especially preventing the release of residual gases after distillation, completely blocking the leakage path of highly toxic gases, and ensuring high safety. Its sealing is controlled by a pinch valve. When it is necessary to extract the liquid in the collection bottle, the pinch valve is in the open state to avoid negative pressure during extraction.

[0011] Furthermore, the inlet pipe of the distillation flask extends to the bottom of the distillation flask and enables liquid inlet and outlet; the outlet pipe of the collection bottle is located at the bottom of the collection bottle and enables liquid inlet and outlet. The pipe design uses a double-bottomed pipe structure, with the pipe extending to the bottom of the bottle. During liquid inlet, the sample is injected along the bottle wall into the bottom of the bottle, avoiding direct contact with the liquid surface and preventing liquid splashing and foam generation. At the same time, during liquid outlet, it is ensured that the liquid in the bottle is completely drained to avoid residue. This enables automatic detection and cleaning processes, thereby achieving automated operation of the detection system, reducing the need for manual intervention, and improving the continuity and stability of the detection process.

[0012] Furthermore, the transfer assembly I includes a syringe pump II, a peristaltic pump I, a three-way valve, and a rotary valve I. One port of the syringe pump II, the common port of the rotary valve I, and the peristaltic pump I are respectively connected to the three-way valve, and the common port of the rotary valve I can selectively connect to either the syringe pump II or the peristaltic pump I. One or more sub-ports of the rotary valve I are connected to the inlet end of the distillation flask. The syringe pump II is a multi-channel syringe pump, the rotary valve I is a multi-channel rotary valve, and the three-way valve is an electrically controlled three-way valve. The transfer assembly I achieves ultra-precise fluid processing and intelligent process switching through a syringe pump-peristaltic pump-multi-valve joint control architecture, enabling precise dispensing of various reagents and automated switching of complex paths, greatly improving the flexibility and adaptability of the system.

[0013] Furthermore, the sub-port of the rotary valve I is also connected to a waste liquid end and an air end. The waste liquid end is used to discharge the liquid in the pipeline, and the air end is used for the precise delivery of solution reagents to achieve automated detection.

[0014] Furthermore, the remaining interfaces of the syringe pump II are respectively connected to the pure water end, the air end, the waste liquid end, and the reagent bottle group I.

[0015] Furthermore, the reagent bottle group I includes an EDTA-2Na reagent bottle, a zinc nitrate reagent bottle, a methyl orange reagent bottle, a tartaric acid reagent bottle, and a phosphoric acid reagent bottle.

[0016] Furthermore, the transfer assembly I also includes a diaphragm pump I, the outlet end of which is connected in parallel with the peristaltic pump I and then connected to the three-way valve.

[0017] Furthermore, the transfer assembly II includes a rotary valve II, a peristaltic pump II, a metering pump I, and a syringe pump I. One of the ports of the syringe pump I, the outlets of the peristaltic pump II and the metering pump I are connected in parallel to the common port of the rotary valve II. One or more sub-ports of the rotary valve II are connected to the outlet of the collection bottle. One of the ports of the syringe pump I is connected to the colorimetric device.

[0018] Furthermore, the sub-ports of the rotary valve II are respectively connected to the waste liquid end, the air end, and the outlet end of the collection bottle, and the remaining ports of the syringe pump I are respectively connected to the waste liquid end, the air end, the mother liquor end, the pure water end, the cuvette, and the reagent bottle group II.

[0019] Furthermore, the reagent bottle group II includes phosphate buffer solution reagent bottles and chloramine T reagent bottles.

[0020] Furthermore, the transfer assembly II also includes a diaphragm pump II, the outlet end of which is connected to the common interface of the rotary valve II.

[0021] Furthermore, the colorimetric device includes a metering pump II and a rotary valve III. The common end of the rotary valve III is connected to the injection pump I of the metering pump II and the transfer assembly II, respectively, and the sub-port of the rotary valve III is connected to the colorimetric tube.

[0022] Furthermore, the injection pump I and the injection pump II are multi-channel injection pumps, and the rotary valve I and the rotary valve II are multi-channel rotary valves.

[0023] This utility model's cyanide detection device in water, by incorporating a distillation device, a transfer device, and a colorimetric device, achieves automation, closed-loop operation, and integration of the process, significantly improving the safety, accuracy, efficiency, and convenience of detection. The inclusion of transfer components I and II allows the entire detection process to be conducted within a closed or semi-closed pipeline, creating a closed-loop operation. This minimizes the chances of personnel directly contacting highly toxic cyanide and strong acids, effectively ensuring their personal safety. From sample injection, distillation, distillate transfer, colorimetric development, waste discharge, and cleaning, this cyanide detection device operates entirely without opening the lid, with zero human contact throughout the entire process. This fully automated operation significantly improves detection efficiency and operational safety, effectively avoiding the risk of personnel contact with cyanide. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the cyanide detection device in water according to this utility model; In the diagram: 1. Syringe pump II, 2. Peristaltic pump I, 3. Diaphragm pump I, 4. Three-way valve, 5. Rotary valve I, 6. Distillation flask, 7. Collection bottle, 8. Rotary valve II, 9. Peristaltic pump II, 10. Diaphragm pump II, 11. Metering pump I, 12. Syringe pump I, 13. Metering pump II, 14. Rotary valve III. Detailed Implementation

[0025] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0026] See Figure 1 This utility model provides a device for detecting cyanide in water, including a distillation device, a transfer device, and a colorimetric device.

[0027] The distillation apparatus is mainly used for distilling water samples. It includes a distillation flask 6 and a collection bottle 7 located at the outlet of the distillation flask 6. The apparatus also includes a heating device and a weighing device. The heating device heats the distillation flask 6, and its heating temperature and time are settable, achieving constant temperature heating. The weighing device is located at the bottom of the collection bottle 7 and is used to weigh the collection bottle 7 and the solution inside. The heating device can precisely control the distillation temperature, avoiding the risk of localized overheating or boiling over caused by traditional open flame heating. It can also be integrated into a system for fully automated detection. The weighing device can monitor the mass change of the distillate in the collection bottle 7 in real time, thereby precisely controlling the reaction process and reagent addition amount, ensuring the accuracy and repeatability of the test results. One distillation flask 6 and one collection bottle 7 constitute a distillation apparatus. Multiple distillation apparatuses can be set up in this application to simultaneously distill multiple samples, thereby achieving batch detection and improving detection efficiency.

[0028] Distillation flask 6 is connected to collection bottle 7 via a liquid outlet pipe, which is a flexible tube. A clamp valve is installed on the liquid outlet pipe, which can clamp the liquid outlet pipe and block the connection between distillation flask 6 and collection bottle 7. The clamp valve is equipped with a drive mechanism, such as a motor, cylinder, or electromagnet, which controls the opening and closing of the clamp valve. When the weighing device detects that collection bottle 7 has reached the threshold, the clamp valve squeezes the flexible tube to instantly cut off the connection between distillation flask 6 and collection bottle 7. This allows the passage of hydrogen cyanide vapor to be blocked at any time during the distillation process, achieving immediate physical isolation and automated control.

[0029] The collection bottle 7 is a sealed structure, which ensures zero leakage of distilled vapor, especially preventing the release of residual gas after distillation, and completely blocking the leakage path of highly toxic gas, thus ensuring high safety. Its sealing is controlled by a pinch valve. When it is necessary to extract the liquid in the collection bottle 7, the pinch valve is in the open state to avoid negative pressure during extraction.

[0030] To achieve automated liquid drainage and cleaning, in this application, the inlet pipe of the distillation flask 6 extends to the bottom of the distillation flask 6, thereby enabling liquid inflow and outflow. Simultaneously, the outlet pipe of the collection bottle 7 is located at the bottom of the collection bottle 7, enabling liquid inflow and outflow. The pipe design employs a double-bottomed pipe structure, with the pipes extending to the bottom of the bottle. During liquid inflow, the sample is injected along the pipes into the bottom of the bottle, avoiding direct contact with the liquid surface and preventing liquid splashing and foam generation. Simultaneously, during liquid drainage, it ensures that the liquid inside the bottle is completely drained, avoiding residue. This enables automated detection and cleaning processes, ensuring cleaning efficiency and effectiveness, and thus automating the operation of the detection system, reducing the need for manual intervention and improving the continuity and stability of the detection process.

[0031] The transfer device is used to transfer liquids such as samples, reagents, and water, and to supply and clean the distillation apparatus. It includes a transfer component I located at the inlet end of the distillation flask 6 and a transfer component II located at the outlet end of the collection bottle 7. In this application, the transfer assembly I includes a syringe pump II1, a peristaltic pump I2, a three-way valve 4, and a rotary valve I5. One port of syringe pump II1, the common port of rotary valve I5, and peristaltic pump I2 are respectively connected to three-way valve 4, allowing the common port of rotary valve I5 to selectively connect to either syringe pump II1 or peristaltic pump I2. One or more sub-ports of rotary valve I5 are connected to the inlet end of distillation flask 6. The syringe pump II1 is a multi-channel syringe pump, rotary valve I5 is a multi-channel rotary valve, and three-way valve 4 is an electrically controlled three-way valve. The transfer assembly I achieves ultra-precise fluid processing and intelligent process switching through a syringe pump-peristaltic pump-multi-valve interconnected control architecture, enabling precise dispensing of various reagents and complex processes. The automated switching of the path greatly improves the system's flexibility and adaptability. The sub-interface of rotary valve I5 is also connected to a waste liquid end and an air end. The waste liquid end is used to discharge the liquid in the pipeline, and the air end is used for the precise delivery of solution reagents to achieve automated detection. The remaining interfaces of syringe pump II1 are connected to pure water, air end, waste liquid end and reagent bottle group I, respectively. Reagent bottle group I includes EDTA-2Na reagent bottle, zinc nitrate reagent bottle, methyl orange reagent bottle, tartaric acid reagent bottle and phosphoric acid reagent bottle. At the same time, transfer component I also includes diaphragm pump I3. Diaphragm pump I3 is connected in parallel with peristaltic pump I2 and then connected to three-way valve 4. The inlet end of diaphragm pump I3 is connected to the pure water end, mainly for cleaning water supply.

[0032] In this application, syringe pump II1 is a multi-channel syringe pump, meaning it has multiple injection channels, specifically 10 ports (channels). Port 1 connects to the air supply, port 2 to the pure water supply, port 3 to the EDTA-2Na reagent bottle, port 4 to zinc nitrate, port 5 to methyl orange, port 6 to tartaric acid, port 7 to phosphoric acid, port 8 to the waste liquid supply, and port 9 to port a of three-way valve 4. Peristaltic pump I2 can achieve forward and reverse rotation and is mainly used for waste discharge. Both diaphragm pump I3 and peristaltic pump I2 are connected to the three-way valve 4. Port b of valve 4 is connected; peristaltic pump I2 is connected to the waste liquid end for forward rotation to discharge waste and reverse rotation to fill air (mix); port c of three-way valve 4 is connected to the common interface of rotary valve I5, and three-way valve 4 can connect to port ac or port bc; rotary valve I5 is a multi-channel rotary valve, which has one common interface and multiple sub-interfaces. The common interface can selectively connect to one of the sub-interfaces. In this application, port 1 of rotary valve I5 is connected to the waste liquid end, port 2 is connected to the air end, and ports 3-8 are respectively connected to the inlet ends of six distillation flasks 6.

[0033] The transfer assembly II includes a rotary valve II8, a peristaltic pump II9, a metering pump I11, and a syringe pump I12. One port of syringe pump I12, peristaltic pump II9, and metering pump I11 are connected in parallel to the common port of rotary valve II8. One or more sub-ports of rotary valve II8 are connected to the outlet of collection bottle 7. One port of syringe pump I12 is connected to the colorimetric device. The sub-ports of rotary valve II8 are respectively connected to the waste liquid end, the air end, and the outlet of collection bottle 7. The remaining ports of syringe pump I12 are respectively connected to the waste liquid end, the air end, the mother liquor end, the pure water end, the cuvette, and reagent bottle group II. Reagent bottle group II includes phosphate buffer reagent bottles and chloramine T reagent bottles. The transfer assembly II also includes a diaphragm pump II10, which is connected to the common port of rotary valve II8. The inlet of diaphragm pump II10 is connected to the pure water end for cleaning water supply.

[0034] In this application, syringe pump I12 is a multi-channel syringe pump, meaning it has multiple injection channels, specifically configured with 10 interface channels. Port 1 connects to the common end of rotary valve III14, port 2 connects to the mother liquor, port 3 connects to the pure water, port 4 connects to the phosphate buffer reagent bottle, port 5 connects to chloramine T reagent, port 6 connects to isonicotinic acid-barbituric acid solution, port 7 connects to the waste liquid, port 8 connects to the air, and port 9 connects to a cuvette. Peristaltic pump II9 can rotate in both directions. Diaphragm pump II10, peristaltic pump II9, metering pump I11, and port 10 of syringe pump I12 are connected in parallel to the common interface of rotary valve II8. The inlet of metering pump I11 is connected to NaOH for transporting NaOH solution. The liquid is alkaline and serves as an independent transfer module; the inlet of diaphragm pump II10 is connected to pure water, and peristaltic pump II9 is ​​connected to the waste liquid end, used for forward rotation to discharge waste and reverse rotation to fill air (mix); rotary valve II8 is a multi-channel rotary valve with one common end and multiple sub-ports. Inside the valve, the common port can selectively connect to one of the sub-ports, and outside the valve, its common end can selectively connect to peristaltic pump II9, diaphragm pump II10, metering pump I11, and syringe pump I12; port 1 of rotary valve II8 is connected to the waste liquid end, port 2 is connected to the air end, and ports 3-8 are respectively connected to the outlet ends of the six collection bottles 7.

[0035] The colorimetric device is connected to the transfer assembly II for color development. The colorimetric device includes a metering pump II 13 and a rotary valve III 14. The common end of the rotary valve III 14 is connected to both the metering pump II 13 and the injection pump I 12 of the transfer assembly II. The sub-ports of the rotary valve III 14 are connected to the waste liquid end and the colorimetric tube, respectively. Specifically, the rotary valve III 14 is a multi-channel rotary valve. Inside the valve body, the common end can be selectively connected to one of the sub-ports. Externally, the common end can be selectively connected to port 1 of the injection pump I 12 or the metering pump II 13. Port 1 is connected to the colorimetric tube, and port 10 is connected to the waste liquid end. The inlet end of the metering pump II 13 is connected to NaOH for NaOH supply.

[0036] The cyanide detection device in water proposed in this application achieves inherent safety, precise automation, and high throughput in the detection of highly toxic substances through a fully enclosed flow path design, intelligent valve-pump coordinated control, and modular functional integration. From sample injection, distillation, distillate transfer, color development, waste liquid discharge, and cleaning, the entire process is unmanned and requires no manual contact, achieving fully automated operation. This significantly improves detection efficiency and operational safety, effectively avoiding the risk of operators coming into contact with cyanide.

[0037] This application, by setting up a distillation device, a transfer device, and a colorimetric device, can achieve automation, closed-loop operation, and integration of the process, significantly improving the safety, accuracy, efficiency, and convenience of the detection.

[0038] By setting up transfer components I and II, the entire detection process (from sample distillation to distillate collection and colorimetric reaction) can be carried out in a closed or semi-closed pipeline, forming a closed operation for detection. This minimizes the chances of laboratory personnel being directly exposed to highly toxic cyanide and strong acid, effectively ensuring the personal safety of operators. This application advances cyanide detection from "high-risk manual operation" to "intelligent closed-loop production line," providing a safe, reliable, accurate, and efficient complete solution for cyanide detection in fields such as environmental monitoring, chemical industry, and disease control.

[0039] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A device for detecting cyanide in water, characterized in that, include: A distillation apparatus, including a distillation flask and a collection bottle disposed at the outlet end of the distillation flask; The transfer device includes transfer component I and transfer component II; The transfer assembly I includes an injection pump II, a peristaltic pump I, a three-way valve, and a rotary valve I. One of the ports of the injection pump II, the common port of the rotary valve I, and the peristaltic pump I are respectively connected to the three-way valve, and the common port of the rotary valve I can selectively connect to either the injection pump II or the peristaltic pump I. One or more sub-ports of the rotary valve I are connected to the inlet end of the distillation flask. The transfer assembly II includes a rotary valve II, a peristaltic pump II, a metering pump I, and a syringe pump I. One of the ports of the syringe pump I, the outlets of the peristaltic pump II and the metering pump I are connected in parallel to the common port of the rotary valve II. One or more sub-ports of the rotary valve II are connected to the outlet of the collection bottle. One of the ports of the syringe pump I is connected to the colorimetric device.

2. The cyanide detection device in water as described in claim 1, characterized in that: The distillation apparatus also includes a heating device for heating the distillation flask and a weighing device located at the lower end of the collection flask for weighing.

3. The cyanide detection device in water as described in claim 1, characterized in that: The distillation flask is connected to the collection bottle via an outlet pipe. The outlet pipe is equipped with a clamp valve, which can clamp the outlet pipe and block the communication between the distillation flask and the collection bottle.

4. The cyanide detection device in water as described in claim 1, characterized in that: The injection pump I and the injection pump II are multi-channel injection pumps, and the rotary valve I and the rotary valve II are multi-channel rotary valves.

5. The cyanide detection device in water as described in claim 1, characterized in that: The inlet pipe of the distillation flask extends to the bottom of the distillation flask and can realize liquid inlet and outlet; the outlet pipe of the collection bottle is located at the bottom of the collection bottle and can realize liquid inlet and outlet.

6. The cyanide detection device in water as described in claim 1, characterized in that: The sub-port of the rotary valve I is also connected to a waste liquid end and an air end.

7. The cyanide detection device in water as described in claim 1, characterized in that: The remaining ports of the syringe pump II are connected to the pure water port, the air port, the waste liquid port, and the reagent bottle group I, respectively.

8. The cyanide detection device in water as described in claim 1, characterized in that: The transfer assembly I also includes a diaphragm pump I, the outlet end of which is connected in parallel with the peristaltic pump I and then connected to the three-way valve.

9. The cyanide detection device in water as described in claim 1, characterized in that: The transfer assembly II also includes a diaphragm pump II, the outlet end of which is connected to the common interface of the rotary valve II.

10. The cyanide detection device in water as described in claim 1, characterized in that: The colorimetric device includes a metering pump II and a rotary valve III. The common end of the rotary valve III is connected to the outlet end of the metering pump II and the injection pump I, respectively. The sub-port of the rotary valve III is connected to a colorimetric tube.

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