Chlorination purification device for laboratory

Abstract

The utility model discloses a chlorination purification device for a laboratory, which relates to the technical field of quartz purification and comprises a heating furnace, a reaction tube, a temperature control device and a tail gas treatment device, the temperature control device is used for controlling the heating temperature of the heating furnace, and the reaction tube penetrates through the heating furnace and is hermetically connected with the heating furnace. The two ends of the reaction pipe extend out of the heating furnace, one end of the reaction pipe is a gas inlet end, the other end of the reaction pipe is a gas outlet end, the gas inlet end is provided with a flow controller, the gas outlet end is connected with the tail gas treatment device, the tail gas treatment device comprises an alkali liquor pool and a spraying device, the gas outlet end is connected with an exhaust pipe, and a gas outlet of the exhaust pipe extends into the bottom in the alkali liquor pool; the spraying device comprises a circulating pump and a spraying pipe, an inlet of the circulating pump is connected with the bottom of the alkali liquor pool through a pipeline, an outlet of the circulating pump is connected with the spraying pipe through a pipeline, and the spraying pipe is arranged above the alkali liquor pool. The quartz sand purification device can effectively purify quartz sand, and is suitable for quartz purification under laboratory conditions.

Description

Technical Field

[0001] This utility model relates to the field of quartz purification technology, and in particular to a chlorination purification device for laboratory use. Background Technology

[0002] High-purity quartz has wide applications in modern technology, and chlorination purification is highly effective in removing alkali metal impurities (such as Li, Na, K, and Al) from quartz. However, currently, this process is only used in large-scale continuous production in factories and enterprises, and there is no small-scale chlorination purification equipment suitable for laboratories. Therefore, we propose a laboratory chlorination purification device to fill this gap and provide technical support for researchers to conduct research on the chlorination purification of high-purity quartz in a laboratory environment. Utility Model Content

[0003] The purpose of this invention is to provide a laboratory chlorination purification device to solve the problems existing in the prior art, which can effectively purify quartz sand and is suitable for quartz purification under laboratory conditions.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a laboratory chlorination purification device, including a heating furnace, a reaction tube, a temperature control device, and a tail gas treatment device. The temperature control device is used to control the heating temperature of the heating furnace. The reaction tube passes through the heating furnace and is sealed to the heating furnace. Both ends of the reaction tube extend outside the heating furnace. One end of the reaction tube is an inlet end, and the other end is an outlet end. A flow controller is installed at the inlet end. The outlet end is connected to the tail gas treatment device. The tail gas treatment device includes an alkaline solution tank and a spray device. An exhaust pipe is connected to the outlet end. The outlet of the exhaust pipe extends to the bottom of the alkaline solution tank. The spray device includes a circulating pump and a spray pipe. The inlet of the circulating pump is connected to the bottom of the alkaline solution tank through a pipeline. The outlet of the circulating pump is connected to the spray pipe through a pipeline. The spray pipe is located above the alkaline solution tank.

[0006] In one embodiment, the top of the alkali tank is provided with a waste gas discharge port, and a gas detection device is installed at the waste gas discharge port.

[0007] In one embodiment, the temperature control device includes a PID controller and a temperature sensor. The temperature sensor is mounted on the heating furnace and is used to measure the heating temperature inside the heating furnace. The temperature sensor is electrically connected to the PID controller, and the PID controller is electrically connected to the heating element of the heating furnace.

[0008] In one embodiment, the heating furnace includes an outer shell and a ceramic fiber layer and an alumina fiber cotton layer sequentially disposed within the outer shell, wherein the outer shell is a stainless steel outer shell.

[0009] In one embodiment, the reaction tube is a transparent quartz glass tube with an inner diameter of 14 mm, an outer diameter of 20 mm, and a wall thickness of 3 mm.

[0010] In one embodiment, the reaction tube is sealed to the heating furnace via a sealing flange.

[0011] In one embodiment, the air intake end is equipped with a plurality of air intake branch pipes, and each air intake branch pipe is equipped with the flow controller.

[0012] In one embodiment, each of the intake manifolds is connected to the intake end via a gas mixer, wherein the gas mixer is a Venturi gas mixer.

[0013] In one embodiment, the alkaline solution tank is provided with a packing layer.

[0014] In one embodiment, the system further includes a control panel and an alarm device, wherein the alarm device, the temperature control device, the flow controller, and the circulating pump are all electrically connected to the control panel.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] The laboratory chlorination purification device provided by this utility model can control and regulate the flow rate of the gas through a flow controller, and can detect the heating temperature of the furnace in real time through a temperature control device. Based on the deviation between the set temperature and the actual temperature inside the furnace, it can automatically adjust the power of the heating element of the furnace to achieve precise control of the furnace temperature and ensure the purification effect of the reaction. Through the setting of the alkali tank and the spray device, the tail gas can be absorbed and treated to improve the treatment effect and avoid the discharge of HCl, Cl2 or dry Cl2 and HCl mixture into the external environment and cause environmental pollution, thus ensuring the safety of operators and realizing quartz purification under laboratory conditions. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the laboratory chlorination purification device in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the layered insulation structure of the furnace body in an embodiment of the present invention.

[0020] In the diagram: 1-Heating furnace, 2-Reaction tube, 3-Inlet, 4-Outlet, 5-Flow controller, 6-Alkali tank, 7-Spraying device, 8-Exhaust pipe, 9-Circulating pump, 10-Spraying pipe, 11-Waste gas outlet, 12-Gas detection device, 13-Temperature sensor, 14-Shell, 15-Ceramic fiber layer, 16-Alumina fiber cotton layer, 17-Sealing flange, 18-Inlet branch pipe, 19-Gas mixer, 20-Packing layer. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] The purpose of this invention is to provide a laboratory chlorination purification device to solve the problems existing in the prior art, which can effectively purify quartz sand and is suitable for quartz purification under laboratory conditions.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1-2 As shown, this embodiment provides a laboratory chlorination purification device, including a heating furnace 1, a reaction tube 2, a temperature control device, and a tail gas treatment device. The temperature control device is used to control the heating temperature of the heating furnace 1. The reaction tube 2 passes through the heating furnace 1 and is sealed to the heating furnace 1. Both ends of the reaction tube 2 extend outside the heating furnace 1. One end of the reaction tube 2 is an inlet end 3, and the other end is an outlet end 4. A flow controller 5 is installed at the inlet end 3. The outlet end 4 is connected to the tail gas treatment device. The tail gas treatment device includes an alkaline solution tank 6 and a spray device 7. An exhaust pipe 8 is connected to the outlet end 4. The outlet of the exhaust pipe 8 extends into the bottom of the alkaline solution tank 6. The spray device 7 includes a circulating pump 9 and a spray pipe 10. The inlet of the circulating pump 9 is connected to the bottom of the alkaline solution tank 6 through a pipeline. The outlet of the circulating pump 9 is connected to the spray pipe 10 through a pipeline. The spray pipe 10 is located above the alkaline solution tank 6.

[0025] This chlorination purification device utilizes a chlorinating agent (such as dried chlorine gas, dried hydrogen chloride gas, or a mixture of both) to chemically react with impurities in quartz under high-temperature conditions. Impurities such as alkali metals, alkaline earth metals, and residual inclusions on the surface of the quartz particles react with the chlorinating agent at high temperatures to generate gaseous chlorides. The high-temperature gas flow carries away these chlorides, thus achieving deep purification.

[0026] The exhaust pipe 8 uses a high-temperature and corrosion-resistant rubber hose, which is tightly connected to the outlet end 4 of the reaction pipe 2 to ensure that all the exhaust gas generated during the reaction process can be collected. The rubber hose has good flexibility and sealing performance, and can adapt to changes in the relative position between the reaction pipe 2 and the exhaust gas treatment device.

[0027] The exhaust gas enters the alkaline solution in the alkaline solution tank 6 for absorption treatment. The alkaline solution is generally a sodium hydroxide solution, and its concentration is adjusted according to the composition and flow rate of the exhaust gas. The circulating pump 9 extracts the alkaline solution from the bottom and transports it through pipelines to the spray pipe 10 at the top. The spray pipe 10 sprays the alkaline solution downwards, contacting the upward-flowing exhaust gas for further absorption treatment, thus improving the exhaust gas treatment effect. The circulating pump 9 is a corrosion-resistant centrifugal pump, characterized by stable flow rate and moderate head, which can meet the requirements of alkaline solution circulation volume during the exhaust gas treatment process.

[0028] In this embodiment, the top of the alkali tank 6 is equipped with an exhaust gas outlet 11, and a gas detection device 12 is installed on the exhaust gas outlet 11. The exhaust gas after alkali absorption treatment is discharged into the atmosphere through the exhaust gas outlet 11. The exhaust gas outlet 11 is located in a well-ventilated location in the laboratory. The gas detection device 12 installed at the exhaust gas outlet 11 monitors the concentration of harmful gases in the exhaust gas in real time to ensure that the exhaust gas meets environmental protection requirements.

[0029] In this embodiment, the temperature control device includes a PID controller and a temperature sensor 13. The temperature sensor 13 is mounted on the heating furnace 1 and is used to measure the heating temperature inside the furnace 1. The temperature sensor 13 is electrically connected to the PID controller, and the PID controller is electrically connected to the heating element of the heating furnace 1, which is a silicon carbide rod. The PID controller can automatically adjust the power of the heating element of the heating furnace 1 according to the deviation between the set temperature and the actual temperature inside the furnace, thereby achieving precise control of the furnace temperature. The temperature sensor 13 uses an S-type thermocouple, which has high temperature measurement accuracy and good stability, and can accurately measure the furnace temperature and feed the temperature signal back to the PID controller in real time. The maximum temperature inside the furnace can reach 1400℃, and the temperature control accuracy is ±2℃, which can meet the stringent temperature requirements of different experiments.

[0030] In this embodiment, the heating furnace 1 includes an outer shell 14 and a ceramic fiber layer 15 and an alumina fiber cotton layer 16 sequentially disposed within the outer shell 14. The outer shell 14 is made of stainless steel. The furnace body of the heating furnace 1 adopts a multi-layer insulation material design. The inner layer is high-purity alumina fiber cotton, which has the characteristics of low thermal conductivity and high heat insulation performance, effectively reducing heat loss. The middle layer is ceramic fiber, which further enhances the insulation effect. The outer layer is a stainless steel shell, which not only protects the internal insulation materials and heating elements, but also makes the equipment more robust and aesthetically pleasing. This multi-layer insulation structure ensures that the furnace surface temperature remains low during high-temperature operation, while also ensuring the safety of the operators.

[0031] In this embodiment, reaction tube 2 is a transparent quartz glass tube with an inner diameter of 14 mm, an outer diameter of 20 mm, and a wall thickness of 3 mm. High-quality transparent quartz glass is selected for reaction tube 2 because quartz glass has excellent high-temperature resistance (softening point up to approximately 1700℃) and good chemical stability. During the high-temperature chlorination reaction, it will not chemically react with the chlorinating agent or reaction products, ensuring the purity of the experiment. Its transparency allows operators to observe the reaction of the sample inside reaction tube 2 in real time. The length of reaction tube 2 is determined according to the overall equipment design and experimental requirements. The small diameter design of reaction tube 2 meets the needs of processing small amounts of samples in the laboratory while allowing the gas to form a suitable flow rate and flow field within the reaction tube 2, ensuring sufficient contact between the gas and the quartz sample and improving reaction efficiency. The wall thickness of reaction tube 2 is precisely calculated to ensure sufficient strength to withstand the furnace pressure without affecting heat transfer and the reaction process.

[0032] In this embodiment, the reaction tube 2 is sealed to the heating furnace 1 via a sealing flange 17. The sealing flange 17 is made of high-temperature resistant and corrosion-resistant graphite material. Graphite material has good sealing properties and chemical stability, which can effectively prevent gas leakage during the reaction process.

[0033] In this embodiment, the air inlet 3 is equipped with multiple air inlet branch pipes 18, each of which is equipped with a flow controller 5 for precisely controlling the flow rate of chlorinating agents (such as dried chlorine gas and dried hydrogen chloride gas) and auxiliary gases (such as nitrogen gas). Each flow controller 5 is connected to the control system, allowing operators to easily set and adjust the flow rates of various gases via the control panel. All gas pipelines are made of 316L stainless steel, a material with excellent corrosion resistance, effectively resisting the erosion of corrosive gases such as chlorinating agents. The inner walls of the pipelines undergo high-precision polishing, reducing gas flow resistance and ensuring smooth gas transmission within the pipelines.

[0034] In this embodiment, each air inlet branch pipe 18 is connected to the air inlet end 3 via a gas mixer 19, which is a Venturi gas mixer. The gas mixer 19 achieves uniform mixing of the gases, ensuring the consistency and stability of the reaction within the reaction tube 2.

[0035] In this embodiment, a packing layer 20 is provided inside the alkali tank 6. The packing layer 20 inside the alkali tank 6, for example, is made of polypropylene Pall rings, which increases the contact area between the exhaust gas and the alkali solution and improves the absorption and treatment effect.

[0036] This embodiment also includes a control panel and an alarm device. The alarm device, temperature control device, flow controller 5, and circulating pump 9 are all electrically connected to the control panel. The control panel adopts a human-machine interface (HMI) design, with a simple, intuitive, and easy-to-use interface. Operators can easily set parameters such as temperature, gas flow rate, and reaction time via the touch screen. Simultaneously, the screen displays the real-time operating status of the equipment, such as furnace temperature, gas flow rate, and equipment running time. The control panel also has function buttons for starting, stopping, and emergency braking of the equipment. The equipment is equipped with a comprehensive alarm device. When abnormal conditions occur, such as excessively high or low furnace temperature, abnormal gas flow rate, or malfunction of the exhaust gas treatment system, the alarm device immediately issues an audible and visual alarm signal to alert the operator. The alarm device can also be connected to a laboratory monitoring system to achieve remote alarm functionality, ensuring that abnormal conditions are detected promptly even when the equipment is unattended.

[0037] The following is the specific experimental procedure for chlorination purification using this apparatus:

[0038] 1. Sample preparation:

[0039] 1.1 Sample Selection: Select quartz samples of appropriate particle size and purity according to the experimental purpose. Generally, the particle size of the quartz sample should be within 120 mesh. The selected samples need to undergo preliminary screening to remove obvious impurity particles.

[0040] 1.2 Water washing: Place the selected quartz sample in deionized water and clean it with an ultrasonic cleaner. Cleaning is typically performed 6-7 times, for a total cleaning time of 5-10 minutes, to remove dust, sand, and other impurities from the sample surface. After cleaning, remove the sample and rinse it repeatedly with deionized water until the water is clear and transparent with a pH value close to 7.

[0041] 1.3 Sample weighing: Use a high-precision electronic balance to weigh a certain amount of quartz sample after washing with water. The amount of sample is generally determined according to the experimental requirements, but should not exceed two-thirds of the volume of reaction tube 2 to ensure that the reaction proceeds fully.

[0042] 1.4 Sample Loading: Carefully place the weighed quartz sample into reaction tube 2. To ensure uniform distribution of the sample within reaction tube 2, a special sample loading tool can be used. During loading, avoid spilling or accumulating the sample in a certain area at the bottom of the reaction tube, ensuring that the sample forms a uniform filling layer within the reaction tube. Alternatively, a clean, long-handled (over 20 cm) PTFE weighing spoon can be used to load the sample into the reaction tube 2 corresponding to the center of the furnace.

[0043] 2. Equipment preparation:

[0044] 2.1 Visual Inspection: Before starting the equipment, first inspect its appearance, checking for damage, deformation, or loose connections in components such as the furnace body, reaction tubes, gas pipelines, and exhaust gas treatment device. If any abnormalities are found, repair or adjustment should be carried out promptly.

[0045] 2.2 Airtightness Check: Conduct a rigorous airtightness check on the gas pipeline. Close all gas outlet valves, open the gas source, and fill the gas pipeline with gas at a certain pressure (generally 0.5 MPa). Then, use soapy water or a professional gas leak detector to check the pipeline connections, valves, joints, etc., and observe whether bubbles are generated or whether the detector issues an alarm signal. If a gas leak is found, immediately stop filling the pipeline and repair the leaking part until the airtightness check is passed.

[0046] 2.3 Control System Initialization: Turn on the control system power and wait for the system to start up completely. Enter the control system operation interface and initialize the temperature control device, flow controller, etc., restoring each parameter to its default value or the state after the last experiment. Simultaneously, check whether the communication between the control system and each equipment component is normal, ensuring that the control system can accurately receive and send signals.

[0047] 2.4 Reagent Preparation: Based on the chlorinating agent selected for the experiment, prepare the corresponding dry chlorine gas, dry hydrogen chloride gas, or a mixture of both, and ensure that the pressure of the gas cylinders is normal and the gas purity meets the experimental requirements. Simultaneously, prepare sufficient alkaline solution for tail gas treatment, and check whether the alkaline solution level in the alkaline solution tank is within the normal range. If the level is too low, replenish the alkaline solution promptly.

[0048] 3. Reaction process:

[0049] 3.1 Nitrogen Purging: Open the nitrogen cylinder valve and adjust the flow controller to allow nitrogen to flow into reaction tube 2 at a certain flow rate (generally 25 L / min). The nitrogen purging time is generally 20 minutes to remove all air from reaction tube 2 and prevent impurities such as oxygen and moisture in the air from interfering with the chlorination reaction. During the purging process, the purging can be judged as normal by observing whether gas is discharged from the exhaust port and whether the flow rate of the discharged gas is stable.

[0050] 3.2 Chlorinating Agent Introduction: After nitrogen purging, close the nitrogen valve, open the chlorinating agent cylinder valve, and adjust the flow controller to introduce the chlorinating agent into reaction tube 2 at the set flow rate (e.g., 0.5 L / min if using dry HCl gas as the chlorinating agent). When introducing the chlorinating agent, the flow rate should be adjusted slowly to avoid sudden flow changes impacting the sample in reaction tube 2. Simultaneously, closely observe the gas flow at the gas mixer to ensure that the chlorinating agent is fully mixed with the previously introduced small amount of nitrogen before entering reaction tube 2.

[0051] 3.3 Heating and Temperature Rise: Start the heating system and raise the furnace temperature to the set temperature (e.g., 1400℃) according to the preset heating rate (generally 10℃ / min). During the heating process, closely monitor the temperature changes displayed on the temperature control device to ensure a smooth heating process without temperature overshoot or slow heating. If any abnormal temperature is detected, promptly check the heating system and temperature sensor to troubleshoot the problem.

[0052] 3.4 Reaction Maintenance: Once the furnace temperature reaches the set temperature, maintain this temperature for a certain period (e.g., 2 hours) to carry out the chlorination reaction. During the reaction, continuously monitor parameters such as furnace temperature and gas flow rate to ensure stable reaction conditions. Simultaneously, observe the sample's reaction status through the transparent portion of reaction tube 2, noting any color changes or gas escape. If any abnormalities are detected, such as an overly vigorous reaction or no obvious signs of reaction, adjust parameters such as temperature and gas flow rate according to the actual situation, or stop the reaction for inspection.

[0053] 4. Exhaust gas treatment:

[0054] 4.1 Residual Gas Removal: After the reaction is complete, first close the valve of the chlorinating agent cylinder to stop the chlorinating agent flow. Then open the nitrogen cylinder valve and adjust the flow controller to allow nitrogen to flow into reaction tube 2 at a relatively high flow rate, thereby removing all residual chlorinating agent and tail gas generated during the reaction and sending them to the tail gas treatment device for processing. The nitrogen purging time is generally 15-30 minutes to ensure that no harmful gases remain in reaction tube 2.

[0055] 4.2 Tail Gas Treatment Operation: Simultaneously with the discharge of residual gas, the circulation pump of the tail gas treatment device is started, causing the alkaline solution to circulate within the absorption unit. After entering the alkaline absorption unit, the tail gas undergoes a neutralization reaction with the alkaline solution and is effectively absorbed. During the tail gas treatment process, the operation of the alkaline absorption unit should be monitored, such as the alkaline solution level and the working status of the circulation pump, to ensure the normal operation of the tail gas treatment system. At the same time, the composition and concentration of the gas emitted from the tail gas outlet should be regularly tested to ensure that the emitted tail gas meets environmental protection requirements.

[0056] 5. Sample preparation:

[0057] 5.1 Cooling: After the exhaust gas treatment is complete, turn off the heating system and allow the furnace to cool naturally. To accelerate the cooling process, the furnace's air-cooling device can be turned on. During the cooling process, continue to introduce a small amount of nitrogen to maintain a slight positive pressure inside reaction tube 2, preventing outside air from entering reaction tube 2. Once the furnace temperature drops to room temperature, close the nitrogen valve.

[0058] 5.2 Sample Removal: Open the connection between reaction tube 2 and the sealing flange, and remove the purified quartz sample. Take care to avoid secondary contamination of the sample. Place the removed sample in a clean container for subsequent processing.

[0059] 5.3 Washing: Place the extracted quartz sample in deionized water and clean it with an ultrasonic cleaner to remove residual chlorides and other impurities from the sample surface. After cleaning, remove the sample and rinse it repeatedly with deionized water until no chloride ions or other impurity ions are detectable in the rinse water.

[0060] 5.4 Drying Treatment: Place the washed quartz sample in an oven for drying. The drying temperature is generally 90℃-120℃, and the drying time is determined according to the sample quantity and oven performance, generally 2-3 hours. The dried sample should be stored in a desiccator to prevent it from absorbing moisture from the air.

[0061] 5.5 Analysis and Testing: Professional analytical instruments (such as inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma optical emission spectrometry (ICP-OES)) were used to analyze the mass fraction of impurity elements in the dried quartz samples. The results were compared with those of the unpurified samples to evaluate the purification effect. Based on the analytical results, experimental experience was summarized to provide a basis for subsequent experimental optimization.

[0062] The laboratory chlorination purification apparatus provided by this utility model:

[0063] 1. Compact size: The equipment is small in size and occupies little space, making it suitable for the limited space environment of the laboratory and convenient for researchers to operate on the experimental table.

[0064] 2. Precise control: The heating system and gas supply system can achieve high-precision temperature and gas flow control, meet the strict requirements of different experiments on process parameters, and improve the accuracy and repeatability of experimental results.

[0065] 3. High flexibility: Different chlorinating agents and reaction conditions can be flexibly selected according to experimental needs, which is suitable for the chlorination and purification research of a variety of high-purity quartz samples, providing more experimental possibilities for scientific research.

[0066] 4. High safety: The comprehensive exhaust gas treatment system and equipment safety protection mechanism effectively prevent the leakage of harmful gases and ensure the safety of laboratory personnel and the experimental environment.

[0067] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A laboratory chlorination purification apparatus, characterized in that: The device includes a heating furnace, a reaction tube, a temperature control device, and a tail gas treatment device. The temperature control device controls the heating temperature of the heating furnace. The reaction tube passes through the heating furnace and is sealed to it. Both ends of the reaction tube extend outside the heating furnace. One end of the reaction tube is an inlet, and the other end is an outlet. A flow controller is installed at the inlet. The outlet is connected to the tail gas treatment device, which includes an alkali tank and a spray device. An exhaust pipe is connected to the outlet, and the outlet of the exhaust pipe extends to the bottom of the alkali tank. The spray device includes a circulating pump and a spray pipe. The inlet of the circulating pump is connected to the bottom of the alkali tank through a pipeline, and the outlet of the circulating pump is connected to the spray pipe through a pipeline. The spray pipe is positioned above the alkali tank.

2. The laboratory chlorination purification apparatus according to claim 1, characterized in that: The top of the alkali tank is equipped with a waste gas discharge port, and a gas detection device is installed at the waste gas discharge port.

3. The laboratory chlorination purification apparatus according to claim 1, characterized in that: The temperature control device includes a PID controller and a temperature sensor. The temperature sensor is installed on the heating furnace and is used to measure the heating temperature inside the heating furnace. The temperature sensor is electrically connected to the PID controller, and the PID controller is electrically connected to the heating element of the heating furnace.

4. The laboratory chlorination purification apparatus according to claim 1, characterized in that: The heating furnace includes an outer shell and a ceramic fiber layer and an alumina fiber cotton layer sequentially disposed within the outer shell. The outer shell is made of stainless steel.

5. The laboratory chlorination purification apparatus according to claim 1, characterized in that: The reaction tube is a transparent quartz glass tube with an inner diameter of 14 mm, an outer diameter of 20 mm, and a wall thickness of 3 mm.

6. The laboratory chlorination purification apparatus according to claim 1, characterized in that: The reaction tube is sealed to the heating furnace via a sealing flange.

7. The laboratory chlorination purification apparatus according to claim 1, characterized in that: The air intake end is equipped with multiple air intake branch pipes, and each air intake branch pipe is equipped with the flow controller.

8. The laboratory chlorination purification apparatus according to claim 7, characterized in that: Each of the aforementioned intake branch pipes is connected to the intake end via a gas mixer, which is a Venturi gas mixer.

9. The laboratory chlorination purification apparatus according to claim 1, characterized in that: The alkaline solution tank is equipped with a packing layer.

10. The laboratory chlorination purification apparatus according to claim 1, characterized in that: It also includes a control panel and an alarm device, wherein the alarm device, the temperature control device, the flow controller and the circulating pump are all electrically connected to the control panel.

Images