Zero gas generating device and analyzer

Abstract

The utility model belongs to the technical field of analysis and detection, and particularly relates to a zero gas generating device and an analyzer. Comprising a gas inlet end, an oil-water separator, a condenser, a pressure regulating valve, an organic matter catalytic converter, a carbon monoxide converter, a membrane filter, a nitrogen sulfide purification tank, a soda lime tank, an adsorption regeneration unit, a temperature and humidity sensor, a gas sensor, a flow divider and a gas outlet end which are sequentially connected through a pipeline, wherein the adsorption regeneration unit comprises a first adsorption regeneration pipe, a second adsorption regeneration pipe, a first regeneration purging pipeline and a second regeneration purging pipeline which are connected in parallel, and an air outlet of the soda lime tank is connected with the air inlet ends of the first adsorption regeneration pipe, the second adsorption regeneration pipe, the first regeneration purging air inlet pipeline and the second regeneration purging air inlet pipeline through a four-way valve. According to the utility model, the structural design of double adsorption regeneration pipes and online purging regeneration is adopted, and the online regeneration efficiency and the service life are optimized, so that the influence of periodic fluctuation of zero gas quality on the measurement accuracy and precision is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of analysis and detection, and particularly relates to a zero gas generating device and an analyzer. Background Art

[0002] In environmental monitoring, accurate calibration of the zero-point working curve is crucial. Regarding instrument performance, zero-point calibration effectively eliminates potential drift, aging, or errors, thereby maximizing data accuracy and reliability. Furthermore, during the monitoring process, the zero point may shift due to environmental conditions. Zero-point calibration promptly corrects this shift, ensuring data stability and reliability. Zero-point calibration also effectively eliminates other potential interfering factors, such as the humidity and temperature of the test gas. These factors can mislead monitoring results, necessitating zero-point calibration to correct them and ensure data accuracy. To obtain more accurate and reliable data, the environmental monitoring community must prioritize the quality of the zero-point calibration gas source and implement effective measures to improve calibration accuracy and reliability. Environmental monitoring requires a large supply of zero-point gas. To address the high cost of commercial nitrogen, commercial zero-point gas generators have been developed and marketed.

[0003] The main structure of the current zero gas generator includes water removal, organic and inorganic removal, and pressure regulation. Water removal adopts pressure swing adsorption regeneration combined with physical condensation. The method of removing organic and inorganic matter is catalytic conversion or material adsorption. The corresponding catalyst or adsorption material is selected according to each component to be removed; however, the adsorption material needs to be replaced and regenerated regularly, which affects the analysis efficiency and also causes periodic fluctuations in the generated zero gas; in addition, the status of the gas source cannot be monitored in real time during use, and there is a risk of generating unqualified zero gas; even if the status of the gas source can be monitored, it is impossible to ensure the normal operation of the analyzer when the zero gas is in an abnormal state. Utility Model Content

[0004] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the purposes of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the purposes of the present invention is to provide a zero gas generating device and analyzer that meets one or more of the above-mentioned needs.

[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions:

[0006] A zero gas generating device comprises an air inlet, an oil-water separator, a condenser, a pressure regulating valve, an organic catalytic converter, a carbon monoxide converter, a membrane filter, a nitrogen and sulfide purification tank, a soda lime tank, an adsorption regeneration unit, a temperature and humidity sensor, a gas sensor, a diverter and an air outlet, which are sequentially connected through pipelines;

[0007] The adsorption regeneration unit includes a first adsorption regeneration pipe, a second adsorption regeneration pipe, a first regeneration purge air inlet pipe, and a second regeneration purge air inlet pipe connected in parallel. The air outlet of the soda lime tank is connected to the air inlet ends of the first adsorption regeneration pipe, the second adsorption regeneration pipe, the first regeneration purge air inlet pipe, and the second regeneration purge air inlet pipe respectively through a four-way valve.

[0008] A first solenoid valve is provided in the pipeline between the four-way valve and the first adsorption regeneration pipe. A first regeneration purge outlet pipeline is led out from the pipeline between the first solenoid valve and the first adsorption regeneration pipe. A third solenoid valve is provided in the first regeneration purge outlet pipeline. The first regeneration purge inlet pipeline is connected to the first adsorption regeneration pipe and the temperature and humidity sensor respectively through a three-way valve. The first regeneration purge inlet pipeline is connected to the first regeneration purge outlet pipeline through the first adsorption regeneration pipe. A fifth solenoid valve is provided in the pipeline between the three-way valve and the temperature and humidity sensor.

[0009] A second solenoid valve is provided in the pipeline between the four-way valve and the second adsorption regeneration tube, and a second regeneration purge outlet pipeline is led out from the pipeline between the second solenoid valve and the second adsorption regeneration tube. The second regeneration purge outlet pipeline is provided with a fourth solenoid valve; the second regeneration purge inlet pipeline is connected to the second adsorption regeneration tube and the temperature and humidity sensor respectively through three-way valve two, and the second regeneration purge inlet pipeline is connected to the second regeneration purge outlet pipeline through the first adsorption regeneration tube; wherein, a sixth solenoid valve is provided in the pipeline between the three-way valve two and the temperature and humidity sensor.

[0010] As a preferred solution, the gas outlets of the first regeneration purge gas outlet pipeline and the second regeneration purge gas outlet pipeline are connected to the atmosphere through a flow limiting valve.

[0011] As a preferred solution, the first adsorption regeneration tube has the same structure as the second adsorption regeneration tube, including a tube body, a heater and an adsorption material arranged inside the tube body. The heater is used to heat the inside of the tube body to achieve heating and purge regeneration.

[0012] As a preferred solution, the pipeline between the three-way valve 1 and the first adsorption regeneration pipe is connected to the pipeline between the three-way valve 2 and the second adsorption regeneration pipe through a spare switching pipeline, and the spare switching pipeline is provided with a seventh solenoid valve.

[0013] As a preferred solution, the pipeline between the fifth solenoid valve and the sixth solenoid valve and the temperature and humidity sensor also leads to a gas storage branch connected to the diverter; wherein, the gas storage branch is provided with a gas storage tank, and the air inlet and air outlet of the gas storage tank are respectively provided with an eighth solenoid valve and a ninth solenoid valve.

[0014] As a preferred solution, the air inlet of the temperature and humidity sensor is provided with a tenth solenoid valve.

[0015] As a preferred embodiment, the organic catalytic converter includes a catalytic tube, which has an air inlet and an air outlet at both ends. A spring, a breathable baffle and a catalyst are arranged in sequence along the axial direction of the catalytic tube. The spring squeezes the breathable baffle so that the catalyst is evenly filled and distributed in the catalytic tube.

[0016] As a preferred embodiment, the carbon monoxide converter includes a conversion tube, which has an air inlet and an air outlet at both ends. A spring, a breathable baffle and a catalytic material are arranged in sequence along the axial direction of the conversion tube. The spring squeezes the breathable baffle so that the catalytic material is evenly filled and distributed in the conversion tube.

[0017] As a preferred solution, the catalytic tube and the conversion tube are installed side by side in the two chambers of the heating base, heating rods are arranged in the diagonal directions of the heating base, the heating rods and the catalytic tube are distributed side by side, and a temperature sensor is also provided between the two chambers of the heating base.

[0018] The utility model also provides an analyzer, which adopts the zero gas generating device as described in any of the above solutions.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The zero gas generating device of the utility model adopts a double adsorption regeneration tube and an online purge regeneration structure design to optimize the online regeneration efficiency and life, thereby avoiding the influence of periodic fluctuations in zero gas quality on measurement accuracy and precision;

[0021] (2) The zero gas generating device of the present invention is designed with a gas storage branch, which can ensure the normal output of zero gas even when an abnormality occurs in the real-time monitoring gas source;

[0022] (3) Due to the defects of powdering and filling, the catalytic material in the traditional converter is unevenly distributed, resulting in insufficient conversion rate. The structural design of the spring and breathable partition makes the catalytic material in the converter evenly distributed, ensuring the conversion rate;

[0023] (4) The organic catalytic converter and carbon monoxide converter of the present invention can be used to distribute and change the heating temperature test by heating and measuring the temperature of the heating base diagonally;

[0024] (5) The zero point calibration accuracy and reliability of the analyzer of the present invention are better. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a flow diagram of the zero gas generating device of Example 1 of the present utility model;

[0026] Figure 2 This is a flow diagram of the adsorption regeneration unit of Example 1 of the present utility model;

[0027] Figure 3 This is a schematic diagram of the integrated structure of the organic catalytic converter and the carbon monoxide converter of Example 1 of the present utility model;

[0028] Figure 4 yes Figure 3 Structural cross-sectional view of the AA portion;

[0029] Figure 5 This is an integrated structural diagram of an organic catalytic converter and a carbon monoxide converter according to Example 1 of the present utility model;

[0030] Figure 6 It is a flow diagram of the adsorption regeneration unit of Example 2 of the present utility model. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the embodiments of the present invention, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0032] Example 1:

[0033] like Figure 1As shown, the zero gas generating device of this embodiment includes an air inlet end 1, an oil-water separator 2, a condenser 3, a pressure regulating valve 4, an organic matter catalytic converter 5, a carbon monoxide converter 6, a membrane filter 7, a nitrogen sulfide purification tank 8, a soda lime tank 9, an adsorption regeneration unit 10, a temperature and humidity sensor 11, a gas sensor 12, a diverter 13 and an air outlet end 14, which are connected in sequence through pipelines. The outside air enters the oil-water separator 2 through the air inlet end 1 for oil-water separation, and the gas after oil-water separation enters the condenser 3 for further water removal. The pressure regulating valve 4 is used to adjust the pressure of the entire air path, and the gas after condensation and water removal enters The organic catalytic converter 5 oxidizes hydrocarbons into carbon dioxide and water, and then enters the carbon monoxide converter 6 to oxidize carbon monoxide into carbon dioxide, and then enters the membrane filter 7 to further remove water, and then enters the nitrogen sulfide purification tank 8 to purify nitrogen oxides and disulfides, and then enters the soda lime tank 9 to remove carbon dioxide, and then enters the adsorption regeneration unit 10 to further remove water to obtain the target zero gas, and then enters the temperature and humidity sensor 11 to detect the temperature and humidity of the target zero gas, and then the gas sensor 12 determines the composition of the target zero gas, and finally outputs through the diverter 13 and the gas outlet 14.

[0034] like Figure 2 As shown, the adsorption regeneration unit 10 of this embodiment includes an adsorption regeneration pipe 101, an adsorption regeneration pipe 102, a four-way valve 103, a regeneration purge air inlet pipe 104, a regeneration purge air inlet pipe 105, a regeneration purge air outlet pipe 106, a regeneration purge air outlet pipe 107 and a flow limiting valve 108.

[0035] Specifically, the adsorption regeneration tube 101 and the adsorption regeneration tube 102 have the same structure, and adopt a heating and purging method to regenerate the gas source, including a tube body, a heater 1010 and an adsorption material arranged inside the tube body. The heater is used to heat the inside of the tube body to achieve heating and purging regeneration. The specific structure can refer to the existing technology and will not be described here. Among them, the material of the tube body can be but not limited to stainless steel, cast iron, aluminum and other metal heat-conducting materials; the heater can be but not limited to heating rods, heating blocks, heating plates, etc.; the adsorption material can be but not limited to conventional adsorption materials such as color-changing silica gel, molecular sieves, activated alumina, etc. During the switching process of the gas circuit, the adsorption pressure is just reached at the end of the final rise. If the pressure is too high, the final rise speed will be too fast, resulting in excessive fluctuations in the flow pressure. Therefore, this embodiment preferably adopts a color-changing silica gel tube for a straight-through design. During the operation of the entire pipeline, there will be no pressure rise and fall factors, avoiding the pressure affecting the regeneration effect.

[0036] The gas outlet of the soda lime tank 9 of this embodiment is respectively connected to the gas inlet ends of the adsorption regeneration pipe 101, the adsorption regeneration pipe 102, the regeneration purge air inlet pipe 104, and the regeneration purge air inlet pipe 105 through a four-way valve 103. A solenoid valve 109 is provided in the pipe between the four-way valve 103 and the gas inlet end of the adsorption regeneration pipe 101. A regeneration purge air outlet pipe 106 is led out from the pipe between the solenoid valve 109 and the adsorption regeneration pipe 101. The regeneration purge air outlet pipe 106 is provided with a solenoid valve 110. The regeneration purge air inlet pipe 104 is respectively connected to the adsorption regeneration pipe 101 and the temperature and humidity sensor 11 through a three-way valve 111. The regeneration purge air inlet pipe 104 is connected to the regeneration purge air outlet pipe 106 through the adsorption regeneration pipe 101. Among them, a solenoid valve 112 is provided in the pipe between the three-way valve 111 and the temperature and humidity sensor 11, and a solenoid valve 1040 is provided in the regeneration purge air inlet pipe 104.

[0037] In this embodiment, a solenoid valve 113 is provided in the pipeline between the four-way valve 103 and the adsorption regeneration pipe 102, and a regeneration purge outlet pipeline 107 is led out from the pipeline between the solenoid valve 113 and the air inlet end of the adsorption regeneration pipe 102, and the regeneration purge outlet pipeline 107 is provided with a solenoid valve 114; the regeneration purge inlet pipeline 105 is respectively connected to the adsorption regeneration pipe 102 and the temperature and humidity sensor 11 through the three-way valve 115, and the regeneration purge inlet pipeline 105 is connected to the regeneration purge outlet pipeline 107 through the adsorption regeneration pipe 102; wherein, a solenoid valve 116 is provided in the pipeline between the three-way valve 115 and the temperature and humidity sensor 11, and the regeneration purge inlet pipeline 105 is provided with a solenoid valve 1050.

[0038] In this embodiment, the gas outlets of the regeneration purge gas outlet pipeline 106 and the regeneration purge gas outlet pipeline 107 are connected to the atmosphere through the flow limiting valve 108.

[0039] In this embodiment, the pipeline between solenoid valves 112 and 116 and the temperature and humidity sensor 11 also extends into a gas storage branch connected to the diverter 13. This gas storage branch includes a gas tank 15, with solenoid valves 117 and 118 at the inlet and outlet, respectively. Furthermore, a solenoid valve 119 is installed at the inlet of the temperature and humidity sensor 11. This design ensures that even if an anomaly occurs during real-time monitoring of the gas source, the gas tank can still ensure the normal output of zero gas.

[0040] For gases like volatile organic compounds (VOCs) and carbon monoxide (CO), which are readily volatilized in industrial processes after adsorption due to changes in temperature or the properties of the adsorbent material, catalytic conversion can be used to remove these difficult-to-adsorb and high-content gases. The catalytic material or catalyst can be a precious metal or an inorganic catalyst, and can be in mesh, sheet, or filament form. Therefore, the organic catalytic converter 5 and the carbon monoxide converter 6 of this embodiment have the same structure, differing only in the catalytic material or catalyst, and are therefore integrated on the same heating base.

[0041] like Figures 3 to 5 As shown, this embodiment uses the structure of an organic catalytic converter 5 as an example for detailed description. Specifically, it includes a catalytic tube 51, with an air inlet 510 and an air outlet 511 at each end. A spring 52, a breathable baffle 53, and a catalyst are arranged in sequence along the axial direction of the catalytic tube 51. The spring 52 compresses the breathable baffle 53 to ensure uniform distribution of the catalyst within the catalytic tube. In this embodiment, the organic catalytic converter 5 and the carbon monoxide converter 6 are mounted side by side within two chambers of a heating base 16. Heating rods 17 are arranged diagonally along the heating base 16, parallel to the catalytic tube. A temperature sensor 18 is also located between the two chambers of the heating base 16.

[0042] The analyzer of this embodiment adopts the above-mentioned zero gas generating device to ensure the stable input of zero gas.

[0043] Example 2:

[0044] The difference between the zero gas generating device of this embodiment and that of embodiment 1 is that:

[0045] like Figure 6 As shown, the pipeline between the three-way valve 111 and the adsorption regeneration pipe 101 and the pipeline between the three-way valve 115 and the adsorption regeneration pipe 102 are connected through a spare switching pipe L, and the spare switching pipe L is provided with a solenoid valve 120 to realize the switching of the pipelines;

[0046] For other structures, please refer to Example 1;

[0047] The analyzer of this embodiment adopts the above-mentioned zero gas generating device to ensure the stable input of zero gas.

[0048] Example 3:

[0049] The difference between the zero gas generating device of this embodiment and that of embodiment 1 is that:

[0050] The design of the gas storage branch can be omitted to meet the needs of different applications;

[0051] For other structures, please refer to Example 1;

[0052] The analyzer of this embodiment adopts the above-mentioned zero gas generating device to ensure the stable input of zero gas.

[0053] The above description is only a detailed description of the preferred embodiments and principles of the present invention. For ordinary technicians in this field, there will be changes in the specific implementation methods based on the ideas provided by the present invention, and these changes should also be regarded as the scope of protection of the present invention.

Claims

1. A zero gas generating device, characterized in that: It includes an air inlet end, an oil-water separator, a condenser, a pressure regulating valve, an organic catalytic converter, a carbon monoxide converter, a membrane filter, a nitrogen and sulfide purification tank, a soda lime tank, an adsorption regeneration unit, a temperature and humidity sensor, a gas sensor, a diverter and an air outlet end which are connected in sequence through pipelines; The adsorption regeneration unit includes a first adsorption regeneration pipe, a second adsorption regeneration pipe, a first regeneration purge air inlet pipe, and a second regeneration purge air inlet pipe connected in parallel. The air outlet of the soda lime tank is connected to the air inlet ends of the first adsorption regeneration pipe, the second adsorption regeneration pipe, the first regeneration purge air inlet pipe, and the second regeneration purge air inlet pipe respectively through a four-way valve. A first solenoid valve is provided in the pipeline between the four-way valve and the first adsorption regeneration pipe. A first regeneration purge outlet pipeline is led out from the pipeline between the first solenoid valve and the first adsorption regeneration pipe. A third solenoid valve is provided in the first regeneration purge outlet pipeline. The first regeneration purge inlet pipeline is connected to the first adsorption regeneration pipe and the temperature and humidity sensor respectively through a three-way valve. The first regeneration purge inlet pipeline is connected to the first regeneration purge outlet pipeline through the first adsorption regeneration pipe. A fifth solenoid valve is provided in the pipeline between the three-way valve and the temperature and humidity sensor. A second solenoid valve is provided in the pipeline between the four-way valve and the second adsorption regeneration tube, and a second regeneration purge outlet pipeline is led out from the pipeline between the second solenoid valve and the second adsorption regeneration tube. The second regeneration purge outlet pipeline is provided with a fourth solenoid valve; the second regeneration purge inlet pipeline is connected to the second adsorption regeneration tube and the temperature and humidity sensor respectively through three-way valve two, and the second regeneration purge inlet pipeline is connected to the second regeneration purge outlet pipeline through the first adsorption regeneration tube; wherein, a sixth solenoid valve is provided in the pipeline between the three-way valve two and the temperature and humidity sensor.

2. The zero gas generating device according to claim 1, characterized in that: The gas outlets of the first regeneration purge gas outlet pipeline and the second regeneration purge gas outlet pipeline are connected to the atmosphere through flow limiting valves.

3. The zero gas generating device according to claim 2, characterized in that: The first adsorption regeneration tube has the same structure as the second adsorption regeneration tube, including a tube body, a heater and an adsorption material arranged inside the tube body. The heater is used to heat the inside of the tube body to achieve heating and purge regeneration.

4. The zero gas generating device according to any one of claims 1 to 3, characterized in that: The pipeline between the three-way valve 1 and the first adsorption regeneration pipe is connected to the pipeline between the three-way valve 2 and the second adsorption regeneration pipe through a spare switching pipeline, and the spare switching pipeline is provided with a seventh solenoid valve.

5. The zero gas generating device according to any one of claims 1 to 3, characterized in that: The pipeline between the fifth solenoid valve and the sixth solenoid valve and the temperature and humidity sensor also leads to a gas storage branch connected to the diverter; wherein, the gas storage branch is provided with a gas storage tank, and the air inlet and air outlet of the gas storage tank are respectively provided with an eighth solenoid valve and a ninth solenoid valve.

6. The zero gas generating device according to claim 5, characterized in that: The air inlet of the temperature and humidity sensor is provided with a tenth solenoid valve.

7. The zero gas generating device according to any one of claims 1 to 3, characterized in that: The organic catalytic converter includes a catalytic tube, which has an air inlet and an air outlet at both ends. A spring, a breathable baffle and a catalyst are arranged in sequence along the axial direction of the catalytic tube. The spring squeezes the breathable baffle to ensure that the catalyst is evenly filled and distributed in the catalytic tube.

8. The zero gas generating device according to claim 7, characterized in that: The carbon monoxide converter includes a conversion tube, which has an air inlet and an air outlet at both ends. A spring, a breathable baffle and a catalytic material are arranged in sequence along the axial direction of the conversion tube. The spring squeezes the breathable baffle so that the catalytic material is evenly filled and distributed in the conversion tube.

9. The zero gas generating device according to claim 8, characterized in that: The catalytic tube and the conversion tube are installed side by side in the two chambers of the heating base. Heating rods are arranged in the diagonal direction of the heating base. The heating rods and the catalytic tube are distributed side by side. A temperature sensor is also provided between the two chambers of the heating base.

10. An analyzer, characterized in that: A zero gas generating device as described in any one of claims 1 to 9 is used.

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