Efficient TOC flow path system
By designing an efficient TOC flow path system and using solenoid valves and sensors to simplify the structure, the existing TOC detection equipment is solved, and the TOC detection effect with low cost and high accuracy is achieved.
Patent Information
- Application Number
- CN202420752220.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-12
AI Technical Summary
The existing TOC detection equipment is expensive, complex in structure, non-standard equipment accounts for the majority, and the replacement cost of parts is high, making it difficult to provide a TOC detection system with simple structure and low cost.
An efficient TOC flow path system was designed, using solenoid valves to replace mechanical components, simplify the structure, ensure smooth flow paths through peristaltic pumps and sensors, and increase the channel function of the switching valves to achieve flow path cleaning and accuracy guarantee, including sample pools , heating furnace, condenser, detector and filter, and use plunger pump and liquid level sensor to ensure accurate liquid handling.
It has achieved simplified structure and reduced costs, improved the reliability and accuracy of the inspection system, and adapted to a variety of inspection needs. The traditional equipment has obvious price advantages, more accurate solenoid valve control, and improved the reliability and accuracy of the flow path system.
Smart Images
Figure CN222212748U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of groundwater detection, in particular to an efficient TOC flow path system. Background Art
[0002] Existing TOC detection equipment is expensive, and most imported equipment is non-standard. The cost of replacing parts is high and the structure is relatively complex. TOC detection equipment is necessary equipment in the field of water pollution detection. Therefore, providing a TOC detection system with simple structure and low cost is a technical problem to be solved. Utility Model Content
[0003] The purpose of the utility model is to provide an efficient TOC flow path system to solve the problems raised in the above background technology.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an efficient TOC flow path system, including a sample cell, wherein the inlet of the sample cell is connected to a switching valve one through a peristaltic pump one, the outlet of the sample cell is connected to a heating furnace through a switching valve two, an overflow channel is provided at the upper end of the sample cell, an air compressor is provided at the bottom end of the sample cell, a plunger pump is provided between the switching valve two and the heating furnace, a nitrogen channel is connected to the heating furnace through an air valve, the heating furnace is connected to a detector through a condenser, a filter one is provided between the condenser and the detector, a filter two is provided at the outlet of the detector, the inlet of the switching valve one has four channels, namely, an injection channel, emptying, hydrochloric acid and pure water, the inlet of the switching valve two has four channels, namely, a sample, a zero standard, a quantity standard and a quality control, and the plunger pump has an inlet, an outlet and a discharge port.
[0005] Preferably, the sampling channel of the switching valve inlet is divided into two modes: online and offline.
[0006] Preferably, the switching valve 1 and the switching valve 2 are both solenoid valves.
[0007] Preferably, the heating furnace is provided with a temperature sensor 1, and the temperature of the heating furnace is set to 670 degrees Celsius.
[0008] Preferably, the condenser is provided with a temperature sensor, the lower end of the condenser is connected to a buffer tank, the buffer tank is connected to peristaltic pump 2, and a liquid level switch is provided between the buffer tank and peristaltic pump 2.
[0009] Preferably, a liquid level sensor 1 is provided between the peristaltic pump 1 and the switching valve 1, and a liquid level sensor 2 is provided between the switching valve 2 and the plunger pump.
[0010] Preferably, the nitrogen channel includes a main gas valve, a dryer, a flow meter and a gas valve, and a pressure sensor is provided between the main gas valve and the dryer.
[0011] Compared with the prior art, the utility model provides an efficient TOC flow path system with the following beneficial effects: traditional TOC detection equipment mostly uses mechanical components with complex structure, while the utility model reduces the use of mechanical components, and the switching valve uses an electromagnetic valve for more precise control; the peristaltic pump combined with the sensor ensures the smooth flow of the detection flow path, and the whole flow path system has obvious price advantages over the purchased imported equipment. Therefore, the utility model is a TOC detection flow path system with a relatively simple structure and obvious price advantages; and the pure water channel of the switching valve one can clean the flow path, and the zero mark, quantity mark and quality control channel of the switching valve two provide guarantee for the accuracy of the flow path system, thereby improving the reliability of the flow path system and adapting to various inspection needs. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor:
[0013] Figure 1 This is a system structure diagram of the utility model.
[0014] Explanation of the reference numerals: 1. Switching valve 1; T1. Liquid level sensor 1; P1. Peristaltic pump 1; P2. Air compressor; 2. Sample cell; 3. Switching valve 2; T2. Liquid level sensor 2; PT1. Plunger pump; P3. Peristaltic pump 2; S1. Control valve; M2. Main air valve; T3. Pressure sensor; 10. Dryer; S2. Flow meter; M1. Air valve; T4. Temperature sensor 1; T5. Temperature sensor 2; 4. Heating furnace; 5. Condenser; 6. Filter 1; 7. Detector; 8. Filter 2; 9. Buffer tank; T6. Liquid level switch. DETAILED DESCRIPTION
[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0016] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0017] like Figure 1 As shown, the flow path system of the utility model includes a sample pool 2, a heating furnace 4, a condenser 5 and a detector 7; the sample inlet of the sample pool 2 is connected to a switching valve 1, and the sample outlet is connected to a switching valve 2 3, and the switching valve 1 and the switching valve 2 3 can be electromagnetic valves. A peristaltic pump 1 P1 is arranged between the switching valve 1 and the sample pool 2, and when the peristaltic pump 1 P1 is in forward transmission, the liquid enters the sample pool 2 through the switching valve 1, and when the peristaltic pump 1 P1 is in reverse transmission, the liquid in the sample pool 2 is discharged from the switching valve 1; a liquid level sensor 1 T1 is arranged between the switching valve 1 and the peristaltic pump 1 P1, and the liquid level sensor 1 T1 is used to detect the amount of liquid entering the sample pool 2 or the amount of liquid discharged. The switching valve 1 sampling channel has two modes, online and offline. The online mode is computer program controlled sampling, and the offline mode is manual sampling. In addition to the sampling channel, the switching valve 1 has three channels, namely, emptying, hydrochloric acid and pure water. The emptying channel is used to discharge all the liquid in the sample pool 2, the hydrochloric acid channel is used to input hydrochloric acid into the sample pool 2, and the pure water channel is used to clean the detection flow path with pure water. The sample pool 2 is also equipped with an air compressor P2. The function of the air compressor P2 is to input compressed air into the sample pool 2 to aerate the liquid in the sample pool 2. In addition to the effect of hydrochloric acid, the CO2 in the sample pool 2 can be discharged from the sample pool 2, so that the inorganic carbon in the liquid to be detected is discharged from the sample pool 2, and the discharged CO2 is discharged from the sample pool 2 along the overflow channel. The overflow channel is set at the upper part of the sample pool 2. The overflow channel can also discharge the excess liquid in the sample pool 2 to prevent the sudden situation that the liquid level sensor T1 and the peristaltic pump P1 cannot stop the liquid intake.
[0018] After aeration treatment in the sample pool 2, the liquid to be tested passes through the switching valve 23 and enters the heating furnace 4 for high-temperature vaporization. A plunger pump PT1 is set between the switching valve 23 and the heating furnace 4. The plunger pump PT1 can quantitatively extract the liquid, extracting 1ml each time. Since only 5μl of the test liquid entering the heating furnace 4 is required, the inlet end of the plunger pump PT1 extracts 1ml, and the outlet end only pumps 5μl into the heating furnace 4. The remaining liquid is discharged through the discharge port at the upper end of the plunger pump PT1. A liquid level sensor 2 T2 is set between the switching valve 23 and the plunger pump PT1. The liquid level sensor 2 T2 monitors the state of the liquid being extracted by the plunger pump PT1 to ensure that liquid reaches the plunger pump PT1.
[0019] The heating furnace 4 is provided with a temperature sensor T4 to monitor the temperature inside the heating furnace 4. After the temperature of the heating furnace 4 reaches 670 degrees, 5μl of the detection liquid will be instantly gasified when entering the heating furnace 4, and the organic carbon in the detection liquid will be converted into CO2. In order to accelerate the gasification of the gas in the heating furnace 4 to quickly enter the detector 7, a nitrogen inlet is also provided at the detection liquid inlet of the heating furnace 4. The opening and closing of the nitrogen channel is controlled by the gas valve M1. The front end of the gas valve M1 is provided with a flow meter S2. The flow meter S2 is used to adjust the flow of nitrogen. When in use, it can be adjusted to 200ml / min to ensure the stability of the flow rate of nitrogen. A dryer 10 is provided at the front end of the flow meter S2. The dryer 10 dries the nitrogen. The front end of the dryer 10 is the main gas valve M2. The front end of the main gas valve M2 is the regulating valve S1. A pressure sensor T3 is provided between the dryer 10 and the main gas valve M2. The pressure sensor T3 detects the smoothness of the nitrogen flow path. After being dried by the dryer 10 and then adjusted in flow rate by the flowmeter S2, the nitrogen enters the heating furnace 4 through the gas valve M1, blows the vaporized detection liquid into the condenser 5, cools down the gas to be detected, and the temperature sensor T5 monitors the temperature in the condenser 5. After the gas to be detected is cooled, part of the gas passes through the filter 6 and enters the detector 7. The TOC content is detected in the detector 7, and the gas is discharged through the filter 8 after being detected. The water generated after the gas to be detected is cooled flows into the buffer tank 9. The outlet of the buffer tank 9 is connected to the peristaltic pump P3. The peristaltic pump P3 discharges the water in the buffer tank 9. A liquid level switch T6 is provided between the peristaltic pump P3 and the buffer tank 9. When the liquid level in the buffer tank 9 reaches a certain level, the liquid level switch T6 turns on the peristaltic pump P3 to pump out the water.
[0020] In addition to the sample channel to be tested, the switching valve 23 is also provided with three other channels, namely zero mark, volume mark and quality control. The zero mark is a channel for testing pure water, the volume mark is a channel for testing liquids with known TOC content, and the quality control is a liquid channel when the demander tests the accuracy of the machine. The zero mark, volume mark and quality control are all set to verify the accuracy of the TOC detection system. When the switching valve 23 is switched to the zero mark, pure water is tested, and the result given by the detector will be a TOC content of 0, indicating that the result of the detection equipment is accurate. When the switching valve 23 is switched to the volume mark, the liquid with a known TOC content is transported to the detector 7 through the detection system. If the result given by the detector 7 matches the known result, it means that the result of the detection equipment is accurate. Under the premise that the zero mark and the volume mark are accurate, we can test the liquid to be tested.
Claims
1. An efficient TOC flow path system, comprising a sample pool (2), wherein the inlet of the sample pool (2) is connected to a switching valve (1) through a peristaltic pump (P1), the outlet of the sample pool (2) is connected to a heating furnace (4) through a switching valve (3), an overflow channel is provided at the upper end of the sample pool (2), an air compressor (P2) is provided at the lower end of the sample pool (2), a plunger pump (PT1) is provided between the switching valve (3) and the heating furnace (4), a nitrogen channel is connected to the heating furnace (4) through an air valve (M1), the heating furnace (4) is connected to a detector (7) through a condenser (5), a filter (6) is provided between the condenser (5) and the detector (7), and a filter (8) is provided at the outlet of the detector (7), characterized in that: The inlet of the switching valve 1 (1) has four channels, namely, the injection channel, the drain channel, the hydrochloric acid channel and the pure water channel. The inlet of the switching valve 2 (3) has four channels, namely, the sample channel, the zero mark channel, the volume mark channel and the quality control channel. The plunger pump (PT1) has an inlet channel, an outlet channel and a discharge port.
2. An efficient TOC flow system according to claim 1, characterized in that: The injection channel of the switching valve one (1) inlet is divided into two modes: online and offline.
3. An efficient TOC flow system according to claim 1, characterized in that: The switching valve 1 (1) and the switching valve 2 (3) are both solenoid valves.
4. An efficient TOC flow system according to claim 2 or 3, characterized in that: The heating furnace (4) is provided with a temperature sensor 1 (T4), and the temperature of the heating furnace (4) is set to 670 degrees Celsius.
5. An efficient TOC flow system according to claim 4, characterized in that: The condenser (5) is provided with a second temperature sensor (T5); the lower end of the condenser (5) is connected to a buffer tank (9); the buffer tank (9) is connected to a second peristaltic pump (P3); and a liquid level switch (T6) is provided between the buffer tank (9) and the second peristaltic pump (P3).
6. An efficient TOC flow system according to claim 5, characterized in that: A liquid level sensor 1 (T1) is provided between the peristaltic pump 1 (P1) and the switching valve 1 (1), and a liquid level sensor 2 (T2) is provided between the switching valve 2 (3) and the plunger pump (PT1).
7. An efficient TOC flow system according to claim 6, characterized in that: The nitrogen channel comprises a main gas valve (M2), a dryer (10), a flow meter (S2) and a gas valve (M1), and a pressure sensor (T3) is provided between the main gas valve (M2) and the dryer (10).