A three-stage water removal system for a TOC analyzer

Abstract

The utility model discloses a tertiary water removal system of TOC analyzer, it is main including condensing pipeline, gas -liquid separator, permeation type drying pipe, removes water through tertiary mode, to reach the effect of completely removing moisture. Condensing pipeline: belong to first grade water removal device, the import connection is in the export of reaction pipe in heating furnace, the intermediate portion is coiled in the side of fan, and the export is connected on the side face upper end inlet of gas -liquid separator. Gas -liquid separator: belong to second grade water removal device, have an inlet two outlets, the import connection of side face top is the export of condensing pipeline, and the export of side face bottom connects solenoid valve, and the most top export is connected to the permeation type drying pipe behind through pipeline. The gas is adjusted flow after pressure reduction through flow limiting valve after pressure reduction by external pressure reducing valve, and the gas after connecting from gas -liquid separator, the sample gas after dewatering finally enters non dispersion infrared detector.

Description

Technical Field

[0001] This utility model relates to the technical field of water removal systems for TOC analyzers, specifically a three-stage water removal system for a TOC analyzer. Background Technology

[0002] A TOC analyzer is an instrument used to determine total carbon, total organic carbon, and total inorganic carbon in water. It is widely used in fields such as chemistry, semiconductors, environmental monitoring, and pharmaceuticals, but typically focuses on testing total organic carbon (TOC). Its core principle is to decompose the sample using physical and chemical methods, and then use non-dispersive infrared spectroscopy to detect the characteristic signals of carbon elements, thereby quantitatively analyzing the carbon content in the target. These instruments play an irreplaceable role in quality control, new material development, and pollutant tracing, and are key analytical tools in scientific research, environmental protection, and industry.

[0003] The moisture removal system is a key component of a TOC analyzer because moisture generated during testing can interfere with the signal readings of the non-dispersive infrared detector. Therefore, effective moisture removal is a crucial step in TOC analysis. To address this, we propose a three-stage moisture removal system for a TOC analyzer. Utility Model Content

[0004] The technical problem this invention aims to solve is to overcome the shortcomings of existing systems and provide a three-stage water removal system for a TOC analyzer. This system can completely remove moisture interference, solving the problem of abnormal experimental results caused by the incomplete removal of water by traditional condensation methods.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a three-stage dehydration system for a TOC analyzer, comprising a heating furnace, a reaction tube, a condenser pipe, a fan, a gas-liquid separator, a waste discharge pipe I, a solenoid valve, a waste discharge pipe II, a transmission pipe I, a purge gas waste discharge pipe, a transmission pipe II, a non-dispersive infrared detector, a tee I, a tee II, a permeation drying pipe, a purge gas pipe, a flow limiting valve, a pressure reducing valve, external pipes, and an oxygen cylinder;

[0006] The reaction tube is inside the heating furnace. The outlet of the reaction tube connects to the inlet of the condenser pipe. A fan is connected to the coiled section in the middle of the condenser pipe. The outlet of the condenser pipe connects to the liquid inlet of the gas-liquid separator. The waste outlet of the gas-liquid separator connects to waste outlet pipe one. Waste outlet pipe one connects to the inlet of the solenoid valve. The outlet of the solenoid valve connects to waste outlet pipe two. The upper gas outlet of the gas-liquid separator connects to the inlet of transmission pipe one. The outlet of transmission pipe one connects to the left inlet of the tee of tee one. The left exhaust port of the tee of tee one connects to the blower. The purging gas exhaust pipeline has the following connections: the left working port of T-junction 1 connects to the inlet of the permeation dryer, the outlet of the permeation dryer connects to the right working port of T-junction 2, the right exhaust port of T-junction 2 connects to the inlet of transmission pipeline 2, and the outlet of transmission pipeline 2 connects to the non-dispersive infrared detector. The oxygen cylinder is connected to the inlet of the pressure reducing valve via an external pipeline, the outlet of the pressure reducing valve connects to the inlet of the purging gas pipeline, a flow limiting valve is connected in series on the purging gas pipeline, and the outlet of the purging gas pipeline connects to the right inlet of T-junction 2.

[0007] Furthermore, the condenser pipe is a first-stage dehydration device made of PTFE. After the sample enters the reaction tube in the heating furnace, it is connected to the inlet of the condenser pipe after exiting the reaction tube. The middle part of the condenser pipe is coiled around the fan, and the outlet of the condenser pipe is connected to the side inlet of the gas-liquid separator.

[0008] Furthermore, the gas-liquid separator is a second-stage water removal device made of glass; it has one inlet and two outlets. The inlet on the upper side is connected to the outlet of the condenser pipe, and the outlet on the lower side is connected to the inlet of the solenoid valve through the first waste discharge pipe. The outlet of the solenoid valve is connected to the second waste discharge pipe, and the outlet at the top of the gas-liquid separator is connected to the subsequent permeation drying pipe through the first transmission pipe and the first tee.

[0009] Furthermore, the permeation drying tube is a third-stage dehydration device with an internal Nafion membrane. One channel of the permeation drying tube is connected to an additional oxygen gas for purging. This gas is supplied by an external oxygen cylinder, travels through an external pipeline to a pressure reducing valve, and after pressure reduction, its flow rate is adjusted by a flow limiting valve on the purging gas pipeline. It then enters the permeation drying tube from the inlet end of the three-way valve. The purging waste gas is discharged from the purging gas exhaust pipeline, and the dehydrated sample gas finally enters the non-dispersive infrared detector through the second transmission pipeline.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: The three-stage water removal system of this TOC analyzer has the following advantages:

[0011] 1. Traditional technologies rely on single-stage or two-stage condensation and water removal, which cannot achieve complete water removal. However, this technology uses three-stage water removal, which can achieve complete water removal.

[0012] 2. The third-stage permeation drying tube does not need to be replaced after long-term use. It can be removed and backflushed with air to restore its effectiveness, thus reducing experimental costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a structural diagram illustrating a gas-liquid separator.

[0015] Figure 3 The diagram illustrates the specific structure of the T-junctions 1 and 2 at both ends of the permeation drying tube.

[0016] In the diagram: 1. Heating furnace, 2. Reaction tube, 3. Condensation pipe, 4. Fan, 5. Gas-liquid separator, 5-1. Upper gas outlet, 5-2. Liquid inlet, 5-3. Waste outlet, 6. Waste outlet pipe one, 7. Solenoid valve, 8. Waste outlet pipe two, 9. Transmission pipe one, 10. Purge gas waste outlet pipe, 11. Transmission pipe two, 12. Non-dispersive infrared detector, 13. T-junction one, 13-1. T-junction left inlet, 13-2. T-junction left working port, 13-3. T-junction left exhaust port, 14. T-junction two, 14-1. T-junction right exhaust port, 14-2. T-junction right working port, 14-3. T-junction right inlet, 15. Permeation drying pipe, 16. Purge gas pipe, 17. Flow limiting valve, 18. Pressure reducing valve, 19. External pipe, 20. Oxygen cylinder. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-3 This embodiment provides a technical solution: a three-stage dehydration system for a TOC analyzer, including a heating furnace 1, a reaction tube 2, a condenser pipe 3, a fan 4, a gas-liquid separator 5, a waste discharge pipe 1 6, a solenoid valve 7, a waste discharge pipe 2 8, a transmission pipe 1 9, a purge gas waste discharge pipe 10, a transmission pipe 2 11, a non-dispersive infrared detector 12, a tee 1 13, a tee 2 14, a permeable drying pipe 15, a purge gas pipe 16, a flow limiting valve 17, a pressure reducing valve 18, an external pipe 19, and an oxygen cylinder 20.

[0019] In the first stage of water removal, reaction tube 2 is inside heating furnace 1. The outlet of reaction tube 2 is connected to the inlet of condenser pipe 3. Fan 4 is connected to the coiled part in the middle of condenser pipe 3. The outlet of condenser pipe 3 is connected to the liquid inlet 5-2 of gas-liquid separator 5.

[0020] In the second stage of water removal, the waste outlet 5-3 of the gas-liquid separator 5 is connected to the waste discharge pipeline 6, the waste discharge pipeline 6 is connected to the inlet of the solenoid valve 7, the outlet of the solenoid valve 7 is connected to the waste discharge pipeline 8, the upper gas outlet 5-1 of the gas-liquid separator 5 is connected to the inlet of the transmission pipeline 9, and the outlet of the transmission pipeline 9 is connected to the left air inlet 13-1 of the tee 13.

[0021] In the third stage of water removal, the left exhaust port 13-3 of the tee of tee one 13 is connected to the purge gas exhaust pipe 10, the left working port 13-2 of the tee of tee one 13 is connected to the inlet of the permeation drying pipe 15, the outlet of the permeation drying pipe 15 is connected to the right working port 14-2 of the tee two 14, the right exhaust port 14-1 of the tee of tee two 14 is connected to the inlet of the transmission pipe two 11, the outlet of the transmission pipe two 11 is connected to the non-dispersive infrared detector 12, the oxygen cylinder 20 is connected to the inlet of the pressure reducing valve 18 through the external pipe 19, the outlet of the pressure reducing valve 18 is connected to the inlet of the purge gas pipe 16, a flow limiting valve 17 is connected in series on the purge gas pipe 16, and the outlet of the purge gas pipe 16 is connected to the right air inlet 14-3 of the tee of tee two 14.

[0022] The working principle of the three-stage dehydration system of the TOC analyzer provided by this utility model is as follows: The reaction tube 2 is kept at a high temperature in the heating furnace 1. When the liquid sample is injected into the reaction tube 2 and reacts, the generated sample component gas and high-temperature water vapor enter the condenser tube 3 under the drive of the carrier gas oxygen. The high-temperature water vapor will be cooled and turned into droplets when passing through the fan 4. Then, the droplets and sample component gas enter the gas-liquid separator 5 from the liquid inlet 5-2 under the drive of the carrier gas oxygen. After entering the gas-liquid separator 5, the liquid part will flow directly to the bottom of the gas-liquid separator 5. When the liquid level reaches a certain height, during the waste discharge stage of the instrument, the solenoid valve 7 will open, and the waste liquid will be discharged from the waste discharge outlet 5-3 through the waste discharge pipe 6, the solenoid valve 7, and the waste discharge pipe 8 to complete the waste discharge. The sample component gas and a small amount of residual water vapor will flow out from the gas outlet 5-1 under the drive of the carrier gas oxygen, and advance to the subsequent permeation drying tube 15 through the transmission pipe 9. The permeation drying tube 15 has two internal channels requiring two gas streams. Oxygen from an external oxygen cylinder 20 is supplied via external pipeline 19, and its pressure is reduced by pressure reducing valve 18. The reduced-pressure gas then passes through flow-limiting valve 17 on purge gas pipeline 16, reaching the right inlet of the right-side three-way valve 14-3 (14-3), and then enters the purge gas layer of the permeation drying tube 15 through the right working port of the three-way valve 14-2. Sample component gases and a small amount of residual water vapor, carried by the carrier oxygen, enter from the left inlet of the left-side three-way valve 13-1 (13-1), and then enter the carrier gas layer of the permeation drying tube 15 through the left working port of the three-way valve 13-2. Because the permeation drying tube 15 has a selective permeation membrane (Nafion material), water molecules permeate from the high-pressure side to the low-pressure side due to the concentration difference as gas flows through the membrane wall, and are ultimately carried away by the reverse purge gas flow. Therefore, purge gas is needed to achieve physical water removal. Finally, the purge gas exhaust gas is discharged from the left exhaust port of the 13-3 tee on the left side of the tee-13 through the purge gas exhaust pipe 10. The carrier gas oxygen, carrying the sample components, is discharged from the working port of the right side tee-214 through the right exhaust port of the 14-1 tee to the transmission pipe 21, and then to the non-dispersive infrared detector 12.

[0023] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A three-stage water removal system for a TOC analyzer, characterized in that: It includes a heating furnace (1), a reaction tube (2), a condenser pipe (3), a fan (4), a gas-liquid separator (5), a waste discharge pipe (6), a solenoid valve (7), a waste discharge pipe (8), a transmission pipe (9), a purge gas waste discharge pipe (10), a transmission pipe (2) (11), a non-dispersive infrared detector (12), a tee (13), a tee (14), a permeable drying pipe (15), a purge gas pipe (16), a flow limiting valve (17), a pressure reducing valve (18), an external pipe (19), and an oxygen cylinder (20). The reaction tube (2) is inside the heating furnace (1). The outlet of the reaction tube (2) is connected to the inlet of the condenser pipe (3). The fan (4) is connected to the coiled part in the middle of the condenser pipe (3). The outlet of the condenser pipe (3) is connected to the liquid inlet (5-2) of the gas-liquid separator (5). The waste outlet (5-3) of the gas-liquid separator (5) is connected to the first waste outlet pipe (6). The first waste outlet pipe (6) is connected to the inlet of the solenoid valve (7). The outlet of the solenoid valve (7) is connected to the second waste outlet pipe (8). The upper gas outlet (5-1) of the gas-liquid separator (5) is connected to the inlet of the first transmission pipe (9). The outlet of the first transmission pipe (9) is connected to the left inlet (13-1) of the tee (13). The left exhaust port (13-3) of the tee (13) is connected to the purge gas waste outlet pipe. The left working port (13-2) of the three-way one (13) is connected to the inlet of the permeation drying tube (15), the outlet of the permeation drying tube (15) is connected to the right working port (14-2) of the three-way two (14), the right exhaust port (14-1) of the three-way two (14) is connected to the inlet of the transmission pipeline two (11), the outlet of the transmission pipeline two (11) is connected to the non-dispersive infrared detector (12), the oxygen cylinder (20) is connected to the inlet of the pressure reducing valve (18) through the external pipeline (19), the outlet of the pressure reducing valve (18) is connected to the inlet of the purge gas pipeline (16), a flow limiting valve (17) is connected in series on the purge gas pipeline (16), and the outlet of the purge gas pipeline (16) is connected to the right air inlet (14-3) of the three-way two (14).

2. The three-stage water removal system of a TOC analyzer according to claim 1, characterized in that: The condenser pipe (3) is the first-stage dehydration device, made of PTFE. After the sample enters the reaction tube (2) in the heating furnace (1), it is connected to the inlet of the condenser pipe (3) after exiting the reaction tube (2). The middle part of the condenser pipe (3) is coiled around the fan (4), and the outlet of the condenser pipe (3) is connected to the side inlet of the gas-liquid separator (5).

3. The three-stage water removal system of a TOC analyzer according to claim 1, characterized in that: The gas-liquid separator (5) is a second-stage dehydration device made of glass. It has one inlet and two outlets. The inlet on the upper side is connected to the outlet of the condenser pipe (3), and the outlet on the lower side is connected to the inlet of the solenoid valve (7) through the first waste discharge pipe (6). The outlet of the solenoid valve (7) is connected to the second waste discharge pipe (8). The outlet at the top of the gas-liquid separator (5) is connected to the downstream permeation drying pipe (15) through the first transmission pipe (9) and the first tee (13).

4. The three-stage water removal system of a TOC analyzer according to claim 1, characterized in that: The permeation drying tube (15) is a third-stage dehydration device with a Nafion membrane inside. One of the permeation drying tubes (15) is connected to an additional oxygen gas for purging. This gas is provided by an external oxygen cylinder (20), passes through an external pipeline (19) to a pressure reducing valve (18), and after pressure reduction, the flow rate is adjusted by a flow limiting valve (17) on the purging gas pipeline (16). It enters the permeation drying tube (15) from the inlet end of the three-way valve (14). The purging waste gas is discharged from the purging gas exhaust pipeline (10). The dehydrated sample gas finally enters the non-dispersive infrared detector (12) through the second transmission pipeline (11).

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