A pre-treatment device for an oxygen analyzer

Abstract

The utility model provides a kind of pretreatment device of oxygen analyzer, including pressure tank, gas duct and pressure relief pipe, and the gas duct and pressure relief pipe are inserted into pressure tank, and pressure tank is equipped with sealed water;The end of the gas duct inserted into pressure tank is immersed in sealed water;The end of the pressure relief pipe inserted into pressure tank extends out of sealed water;The pretreatment device further includes water replenishing tank, and water replenishing tank and pressure tank are connected by water duct, and water replenishing tank is equipped with sealed water;Sealed water in water replenishing tank is added to pressure tank by water duct.Sealed water is lost in pressure tank, and water replenishing tank supplies sealed water for pressure tank by water duct, to ensure that the water level of sealed water in pressure tank is maintained in appropriate range, to ensure that the filtering and stable flow function of sealed water to sample gas continue effectively, to avoid the measurement flow to be low due to lack of sealed water, to solve the problem that the oxygen content measured by analyzer is distorted and cannot reflect real oxygen content.

Description

Technical Field

[0001] This utility model relates to auxiliary equipment for oxygen analyzers, specifically to a pretreatment device for oxygen analyzers. Background Technology

[0002] The oxygen analyzer is equipped with a sealing water device in the pretreatment section. After the sample gas from the process pipeline enters the pretreatment system, it is split into two paths. One path enters the sealing water device to maintain the pressure within the pretreatment system and is then discharged to the process discharge pipeline. The other path enters a pressure reducing valve and then branches through gas lines to two separate rotor flowmeters in the analyzer to measure oxygen content. If the sealing water level in the sealing water device is too low, the pressure reducing valve will also be too low. If the analyzer detects a low pressure, it will trigger an interlock, causing the analyzer to shut down. Furthermore, insufficient sealing water will also lead to a lower measured flow rate, resulting in inaccurate oxygen content readings from the analyzer. Utility Model Content

[0003] The purpose of this invention is to provide a pretreatment device for an oxygen analyzer. The technical problem to be solved is that the oxygen content measured by the analyzer is distorted and cannot reflect the true oxygen content.

[0004] This utility model is achieved through the following technical solution: A pretreatment device for an oxygen analyzer includes a pressure stabilizing tank, a gas delivery pipe, and a pressure relief pipe. The gas delivery pipe and the pressure relief pipe are both inserted into the pressure stabilizing tank, which is filled with sealing water. The end of the gas delivery pipe inserted into the pressure stabilizing tank is immersed in the sealing water. The end of the pressure relief pipe inserted into the pressure stabilizing tank extends out of the sealing water. The pretreatment device also includes a water replenishment tank, which is connected to the pressure stabilizing tank via a water pipe. The water replenishment tank contains sealing water. The sealing water in the water replenishment tank is added to the pressure stabilizing tank through the water pipe.

[0005] Sample gas enters the pressure stabilizing tank through a gas delivery pipe. The inlet flow rate of the analyzer is stabilized by sealing water, and the discharged sample gas is filtered, reducing environmental pollution. Sealing water extends from the end of the pressure relief pipe. When the gas pressure increases and then releases pressure, the gas does not directly impact the sealing water, preventing the loss of a large amount of sealing water. Compared to existing technologies, this reduces sealing water loss to a certain extent, maintaining a more stable sealing water level, ensuring the accuracy of flow rate measurement, and thus improving the accuracy of oxygen content measurement by the analyzer, solving the problem of oxygen content distortion.

[0006] Even if a small amount of sealing water is lost from the pressure stabilizing tank during long-term operation, the water replenishment tank can replenish the sealing water to the pressure stabilizing tank through the water pipe, ensuring that the sealing water level in the pressure stabilizing tank is maintained within a suitable range. This ensures that the sealing water's function of filtering and stabilizing the flow rate of the sample gas remains effective, avoiding low measured flow rate due to insufficient sealing water. This further ensures the accuracy of the analyzer's measurements and effectively solves the problem of distorted oxygen content measured by the analyzer, which fails to reflect the true oxygen content.

[0007] Furthermore, the aforementioned water pipe is equipped with a valve. When the pressure stabilizing tank is short of water, the valve is opened, and the sealed water in the water replenishment tank is added to the pressure stabilizing tank through the aforementioned water pipe.

[0008] A valve is installed on the water supply pipe to control the water replenishment operation. When the pressure tank is operating normally and the sealing water level is sufficient, the valve is closed to prevent sealing water from the replenishment tank from flowing into the pressure tank unnecessarily, thus avoiding potential problems caused by excessive water levels, such as obstructed gas flow. When the pressure tank experiences water shortage due to prolonged operation or other reasons, the valve can be opened by personnel, allowing sealing water from the replenishment tank to be added to the pressure tank through the water supply pipe, replenishing the missing sealing water and ensuring that the sealing water level in the pressure tank is always maintained within the appropriate range.

[0009] Furthermore, the aforementioned pressure stabilizing tank is equipped with a float level controller, which is connected to the valve and controls the opening and closing of the valve.

[0010] The float-type level controller monitors the water level changes in the pressure stabilizing tank in real time and automatically controls the valve opening and closing based on the water level. When the water level in the pressure stabilizing tank drops due to evaporation, minor leakage, or other reasons, the float-type level controller detects the drop and automatically opens the valve, allowing the sealing water in the replenishment tank to flow into the pressure stabilizing tank through the water pipe, achieving timely water replenishment. When the water level rises to the appropriate height, the float-type level controller automatically closes the valve, stopping water replenishment. This eliminates the need for constant monitoring of the pressure stabilizing tank water level and manual valve operation, improving the timeliness and accuracy of water replenishment and reducing problems such as untimely or excessive water replenishment caused by human factors. This solution avoids the filtration and flow stabilization functions of the sealing water failing due to excessively low water levels, thus preventing the analyzer from affecting measurement accuracy; and it also prevents excessively high water levels from affecting normal gas flow and pressure relief.

[0011] Furthermore, the pretreatment device also includes a cooling gun, which is connected to a pressure stabilizing tank via a gas guide pipe; The aforementioned cooling gun is equipped with an air inlet pipe, which is used to introduce sample gas into the cooling gun.

[0012] The sample gas first enters the cooling gun for preliminary cooling to reduce the damage of high-temperature sample gas to the analyzer. After cooling, the sample gas enters the pressure stabilizing tank through the gas delivery tube. The end of the gas delivery tube is immersed in sealed water, which can filter impurities in the sample gas, improve the purity of the sample gas discharged from the pressure relief tube, and reduce environmental pollution.

[0013] Furthermore, one end of the pressure relief pipe inserted into the pressure stabilizing tank faces the top of the pressure stabilizing tank.

[0014] When the pressure inside the pressure tank rises and pressure needs to be released, gas is discharged from the pressure relief pipe. Because the pressure relief pipe faces upwards, the gas discharge direction is relatively parallel to the surface of the sealing water, reducing the direct impact of the gas on the sealing water surface during discharge. Compared to gas impacting the sealing water surface perpendicularly, this reduces the amount of sealing water carried away during pressure relief, further maintaining the stability of the sealing water level inside the pressure tank.

[0015] Furthermore, one end of the gas guide tube inserted into the pressure stabilizing tank faces the bottom of the pressure stabilizing tank.

[0016] The cooled sample gas enters the pressure stabilizing tank through the gas delivery pipe. Since one end of the gas delivery pipe faces the bottom of the pressure stabilizing tank, the sample gas enters from the bottom and flows upward slowly. As it flows upward, the sample gas passes through the sealing water layer inside the pressure stabilizing tank. The sealing water stabilizes the airflow, making the gas flow into the analyzer uniform and stable. When the pressure inside the pressure stabilizing tank rises and pressure relief is needed, the gas is discharged from the pressure relief pipe facing the top of the pressure stabilizing tank. When the gas is discharged, it may carry the sealing water out. When the float level controller detects a drop in the sealing water level, it opens the valve to add water to the pressure stabilizing tank.

[0017] Furthermore, the aforementioned water pipe is inserted from the top of the pressure stabilizing tank.

[0018] Sealing water enters from the top of the pressure stabilizing tank to avoid causing significant disturbance to the already stabilized airflow and sealing water layer inside the tank, ensuring that the sample gas processing inside the pressure stabilizing tank is not affected.

[0019] Furthermore, a gap is left between the sealing water level in the aforementioned pressure stabilizing tank and the end of the pressure relief pipe.

[0020] When the sample gas enters the pressure stabilizing tank, the pressure inside the tank gradually increases. The sample gas is discharged through the pressure relief pipe. During discharge, it may carry sealing water. This spacing is to reduce the amount of sealing water carried by the sample gas and reduce the rate of sealing water loss.

[0021] Compared with the prior art, this utility model has the following advantages and beneficial effects: Sample gas enters the pressure stabilizing tank through a gas delivery pipe. The inlet flow rate of the analyzer is stabilized by sealing water, and the discharged sample gas is filtered, reducing environmental pollution. Sealing water extends from the end of the pressure relief pipe. When the gas pressure increases and then releases pressure, the gas does not directly impact the sealing water, preventing the loss of a large amount of sealing water. Compared to existing technologies, this reduces sealing water loss to a certain extent, maintaining a more stable sealing water level, ensuring the accuracy of flow rate measurement, and thus improving the accuracy of oxygen content measurement by the analyzer, solving the problem of oxygen content distortion.

[0022] Even if a small amount of sealing water is lost from the pressure stabilizing tank during long-term operation, the water replenishment tank can replenish the sealing water to the pressure stabilizing tank through the water pipe, ensuring that the sealing water level in the pressure stabilizing tank is maintained within a suitable range. This ensures that the sealing water's function of filtering and stabilizing the flow rate of the sample gas remains effective, avoiding low measured flow rate due to insufficient sealing water. This further ensures the accuracy of the analyzer's measurements and effectively solves the problem of distorted oxygen content measured by the analyzer, which fails to reflect the true oxygen content. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the exemplary embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a connection block diagram of the pretreatment device; The attached diagram shows the markings and corresponding component names: 1. Pressure stabilizing tank; 2. Water replenishment tank; 3. Valve; 4. Air guide pipe; 5. Pressure relief pipe; 6. Water guide pipe; 7. Cooling gun; 8. Air inlet pipe. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0025] Because the sample gas extracted from the process pipeline may contain high temperature, high humidity, dust, or corrosive substances, it cannot be directly sent to the analyzer. Therefore, the sample gas needs to undergo pretreatment such as cooling, dust removal, and drying before being sent to the analyzer. In actual production, operating conditions often fluctuate; these fluctuations disrupt the original water balance, leading to a significant loss of sealing water. The lack of sealing water causes the water seal to fail, compromising the airtightness of the pretreatment system. Consequently, the analyzer cannot reliably extract sufficient sample gas, resulting in a lower-than-normal flow rate at the analyzer inlet. This leads to inaccurate oxygen content readings from the analyzer, failing to reflect the true operating conditions.

[0026] First embodiment: A pretreatment device for an oxygen analyzer, combined with Figure 1The system includes a pressure stabilizing tank 1, a vent pipe 4, and a pressure relief pipe 5. Both the vent pipe 4 and the pressure relief pipe 5 are inserted into the pressure stabilizing tank 1. The pressure stabilizing tank 1 is filled with sealing water, which can be tap water, ethylene glycol aqueous solution, mineral oil, phosphate buffer solution, etc. The end of the vent pipe 4 inserted into the pressure stabilizing tank 1 is immersed in the sealing water. The end of the pressure relief pipe 5 inserted into the pressure stabilizing tank 1 extends out of the sealing water. The pretreatment device also includes a water replenishment tank 2, which is connected to the pressure stabilizing tank 1 via a water pipe 6. The water replenishment tank 2 contains sealing water. The sealing water in the water replenishment tank 2 is added to the pressure stabilizing tank 1 through the water pipe 6. The water pipe 6 can be a plastic flexible hose. The water replenishment tank 2 can be positioned above the pressure stabilizing tank 1, using the gravity of the sealing water to transport it into the pressure stabilizing tank 1; alternatively, a water pump can be used to draw the sealing water from the water replenishment tank 2 into the pressure stabilizing tank 1.

[0027] The sample gas enters the pressure stabilizing tank 1 through the gas guide pipe 4. The inlet flow rate of the analyzer is stabilized by the sealing water, and the discharged sample gas is filtered to reduce environmental pollution. The pressure relief pipe 5 extends to the sealing water. When the pressure increases and the gas is depressurized, the gas will not directly impact the sealing water, preventing a large amount of sealing water from being carried away. Compared with existing technologies, this reduces the loss of sealing water to a certain extent, thus maintaining a relatively stable sealing water level, ensuring the accuracy of the measured flow rate, and ultimately improving the accuracy of the analyzer's oxygen content measurement, solving the problem of oxygen content distortion.

[0028] Even if a small amount of sealing water is lost from the pressure stabilizing tank 1 during long-term operation, the water replenishment tank 2 can replenish the sealing water to the pressure stabilizing tank 1 through the water guide pipe 6, ensuring that the sealing water level in the pressure stabilizing tank 1 is maintained within a suitable range. This ensures that the sealing water's function of filtering and stabilizing the flow rate of the sample gas remains effective, avoiding low measured flow rate due to insufficient sealing water. This further ensures the accuracy of the analyzer's measurements and effectively solves the problem of distorted oxygen content measured by the analyzer, which fails to reflect the true oxygen content.

[0029] In a specific embodiment, the water pipe 6 is equipped with a valve 3, which can be a solenoid valve, ball valve, etc. When the pressure tank 1 is short of water, the valve 3 is opened, and the sealing water in the water replenishment tank 2 is added to the pressure tank 1 through the water pipe 6. After the water is added, the valve 3 is closed, without affecting the analyzer's measurement. Sealing water can be added during the online measurement process of the analyzer, solving the problem of frequently deactivating the interlock and stopping the analyzer due to the need to add sealing water.

[0030] A valve 3 is installed on the water supply pipe 6 to control the water replenishment operation. When the pressure tank 1 is operating normally and the sealing water level is sufficient, the valve 3 is in the closed state to prevent the sealing water in the water supply tank 2 from flowing into the pressure tank 1 without reason, and to avoid other problems that may be caused by excessive water level, such as obstruction of gas flow. When the pressure tank 1 is short of water due to long-term operation or other reasons, the operator can open the valve 3, and the sealing water in the water supply tank 2 can be added to the pressure tank 1 through the water supply pipe 6 to replenish the missing sealing water and ensure that the sealing water level in the pressure tank 1 is always maintained within a suitable range.

[0031] Second embodiment: Based on the first embodiment, in order to achieve automatic water replenishment, a float level controller is installed in the pressure stabilizing tank 1 to detect changes in the float and add water. The float level controller can be a UQK(S)-100 series float level controller, ST-M15-2 type float level controller, etc. The float level controller is connected to the valve 3 and controls the opening and closing of the valve 3.

[0032] The float-type level controller monitors the water level changes in the sealing water in pressure stabilizing tank 1 in real time and automatically controls the opening and closing of valve 3 based on the water level. When the water level in pressure stabilizing tank 1 drops due to evaporation, minor leakage, or other reasons, the float-type level controller detects the drop and automatically opens valve 3, allowing the sealing water in replenishment tank 2 to flow into pressure stabilizing tank 1 through water pipe 6, achieving timely water replenishment. When the water level rises to a suitable height, the float-type level controller automatically closes valve 3, stopping water replenishment. This eliminates the need for constant monitoring of the water level in pressure stabilizing tank 1 and manual operation of valve 3, improving the timeliness and accuracy of water replenishment and reducing problems such as untimely or excessive water replenishment caused by human factors. This solution avoids the filtration and flow stabilization functions of the sealing water failing due to excessively low water levels, thus preventing the analyzer from affecting measurement accuracy; and it also prevents excessively high water levels from affecting normal gas flow and pressure relief.

[0033] Third embodiment: Based on any of the above embodiments, the pretreatment device further includes a cooling gun 7, which is connected to the pressure stabilizing tank 1 through an air guide pipe 4; the cooling gun 7 can be a SUNAIR SR-L25, VAIR™ cold air gun, RTK-VTL25, VAIR™ adjustable temperature cold air gun, etc. The aforementioned cooling gun 7 is equipped with an air inlet pipe 8, which is used to introduce sample gas into the cooling gun 7.

[0034] The sample gas first enters the cooling gun 7 for initial cooling to reduce the damage of high-temperature sample gas to the analyzer. After cooling, the sample gas enters the pressure stabilizing tank 1 through the gas guide pipe 4. The end of the gas guide pipe 4 is immersed in sealed water, which can filter impurities in the sample gas, improve the purity of the sample gas discharged from the pressure relief pipe 5, and reduce environmental pollution.

[0035] Fourth embodiment: Based on any of the above embodiments, one end of the pressure relief pipe 5 inserted into the pressure stabilizing tank 1 faces the top of the pressure stabilizing tank 1.

[0036] When the pressure inside the pressure stabilizing tank 1 rises and pressure relief is required, gas is discharged from the pressure relief pipe 5. Since the pressure relief pipe 5 faces upwards, the gas discharge direction is relatively parallel to the surface of the sealing water, reducing the direct impact of gas discharge on the sealing water surface. Compared to gas impacting the sealing water surface vertically, this reduces the amount of sealing water carried away during gas pressure relief, further maintaining the stability of the sealing water level inside the pressure stabilizing tank 1.

[0037] In a specific embodiment, one end of the air guide pipe 4 inserted into the pressure stabilizing tank 1 faces the bottom of the pressure stabilizing tank 1.

[0038] After cooling, the sample gas enters the pressure stabilizing tank 1 through the gas guide pipe 4. Since one end of the gas guide pipe 4 faces the bottom of the pressure stabilizing tank 1, the sample gas enters from the bottom and flows upward slowly. When flowing upward, the sample gas passes through the sealing water layer inside the pressure stabilizing tank 1. The sealing water can stabilize the airflow, making the gas flow into the analyzer uniform and stable. When the pressure inside the pressure stabilizing tank 1 rises and needs to be depressurized, the gas is discharged from the pressure relief pipe 5 facing the top of the pressure stabilizing tank 1. When the gas is discharged, it may carry the sealing water out. When the float level controller detects that the sealing water level has dropped, it opens the valve 3 to add water to the pressure stabilizing tank 1.

[0039] In a specific embodiment, the water pipe 6 is inserted from the top of the pressure stabilizing tank 1.

[0040] Sealing water enters from the top of the pressure stabilizing tank 1 to avoid causing significant disturbance to the already stabilized airflow and sealing water layer inside the pressure stabilizing tank 1, ensuring that the sample gas processing in the pressure stabilizing tank 1 is not affected.

[0041] Fifth embodiment: Based on any of the above embodiments, a gap is left between the sealing water level in the pressure stabilizing tank 1 and the end of the pressure relief pipe 5. This gap can be greater than or equal to 1cm, such as 1cm, 1.5cm, 2cm, etc.

[0042] When the sample gas enters the pressure stabilizing tank 1, the pressure inside the pressure stabilizing tank 1 gradually increases. The sample gas is discharged through the pressure relief pipe 5. During the discharge, it may carry sealing water. This spacing is to reduce the amount of sealing water carried by the sample gas and reduce the rate of sealing water loss.

[0043] The pretreatment device of the oxygen analyzer operates as follows: After the sample gas enters the cooling gun, it is divided into two paths. One path enters the pressure stabilizing tank to maintain the internal pressure of the pretreatment device. When the pressure increases, part of the sample gas is discharged through the pressure relief pipe to maintain pressure balance. When the sealing water level in the pressure stabilizing tank is too low, in order to avoid the pressure reducing valve triggering the interlock and causing the analyzer to stop working, the sealing water level in the pressure stabilizing tank can be detected by the float level controller during the analyzer measurement. The opening and closing of the valve is controlled according to the sealing water level in the pressure stabilizing tank to avoid the analyzer detecting too low pressure and triggering the interlock, thus stopping the analyzer. Another path leads to the analyzer, which is equipped with a pressure reducing valve and two rotor flow meters (not shown in the figure). The sample gas is delivered to the two rotor flow meters via a branch line connected to the pressure reducing valve, and the oxygen content is measured by the rotor flow meters.

[0044] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A pretreatment device for an oxygen analyzer, comprising a pressure stabilizing tank (1), a gas delivery pipe (4), and a pressure relief pipe (5), wherein both the gas delivery pipe (4) and the pressure relief pipe (5) are inserted into the pressure stabilizing tank (1), and the pressure stabilizing tank (1) is filled with sealing water; the end of the gas delivery pipe (4) inserted into the pressure stabilizing tank (1) is immersed in the sealing water; and the end of the pressure relief pipe (5) inserted into the pressure stabilizing tank (1) extends out of the sealing water. Its features are, The pretreatment device also includes a water replenishment tank (2), which is connected to the pressure stabilizing tank (1) by a water pipe (6). The water replenishment tank (2) contains sealing water. The sealing water in the water replenishment tank (2) is added to the pressure stabilizing tank (1) through the water pipe (6).

2. The pretreatment apparatus according to claim 1, characterized in that, The water pipe (6) is equipped with a valve (3). When the pressure tank (1) is short of water, the valve (3) is opened and the sealed water in the water replenishment tank (2) is added to the pressure tank (1) through the water pipe (6).

3. The pretreatment apparatus according to claim 2, characterized in that, The pressure stabilizing tank (1) is equipped with a float level controller, which is connected to the valve (3) and controls the opening and closing of the valve (3).

4. The pretreatment apparatus according to claim 1, characterized in that, The pretreatment device also includes a cooling gun (7), which is connected to the pressure stabilizing tank (1) through a gas guide pipe (4); The cooling gun (7) is equipped with an air inlet pipe (8), which is used to introduce sample gas into the cooling gun (7).

5. The pretreatment apparatus according to claim 1, characterized in that, One end of the pressure relief pipe (5) inserted into the pressure stabilizing tank (1) faces the top of the pressure stabilizing tank (1).

6. The pretreatment apparatus according to claim 1, characterized in that, One end of the air guide pipe (4) inserted into the pressure stabilizing tank (1) faces the bottom of the pressure stabilizing tank (1).

7. The pretreatment apparatus according to claim 1, characterized in that, The water pipe (6) is inserted from the top of the pressure stabilizing tank (1).

8. The pretreatment apparatus according to claim 1, characterized in that, There is a gap between the sealing water level in the pressure stabilizing tank (1) and the end of the pressure relief pipe (5).

Images