Compressed air / nitrogen refining and filtering system for detecting carrier gas

Abstract

The utility model belongs to the technical field of filtering devices, and particularly relates to a compressed air / nitrogen refining and filtering system for detecting carrier gas. Comprising an activated carbon adsorption device and a molecular sieve adsorption device, the activated carbon adsorption device is connected with the molecular sieve adsorption device, and outlets of the activated carbon adsorption device and the molecular sieve adsorption device are respectively provided with a component analyzer and a moisture analyzer; the molecular sieve adsorption device is respectively connected with an inlet of the activated carbon adsorption device, the detection center and the storage tank through pipelines; an outlet of the storage tank is connected with the detection center through a pipeline; the device further comprises a compressed air / nitrogen pipeline, and an outlet of the compressed air / nitrogen pipeline is connected with the detection center through a pipeline. Through dual adsorption purification of activated carbon and a molecular sieve, output gas is ensured to be dry and pure, and strict requirements of detection equipment on carrier gas are met. Meanwhile, deep purification of self-produced gas is achieved through the system, outsourcing steel cylinder gas with high cost and many potential safety hazards is replaced, and the production cost and transportation and storage risks are remarkably reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of filtering devices, and particularly relates to a compressed air / nitrogen refining and filtering system for detecting carrier gas. Background Art

[0002] In the fields of production and research, the normal operation of detection equipment highly depends on high-quality carrier gases such as compressed air and nitrogen. However, the compressed air and nitrogen produced by many utility workshops often contain high levels of moisture and organic substances, and these impurities will seriously affect the accuracy and stability of detection equipment, and even cause equipment failures. Traditionally, in order to meet the strict requirements of detection equipment for carrier gas, enterprises have to rely on purchased finished compressed air and nitrogen, and these products are usually supplied in the form of steel cylinders.

[0003] Although the compressed air and nitrogen stored in purchased steel cylinders have stable quality, there are many disadvantages: First, there are safety risks during the transportation, storage and use of steel cylinders, such as potential dangers of leakage, explosion, etc., increasing the safety hazards in the production environment; Second, the frequent replacement and transportation of steel cylinders increase the operating costs of enterprises, including logistics costs, labor costs and the occupation of storage space; Third, the reuse of steel cylinders also involves environmental protection issues, such as the treatment and recycling of waste steel cylinders. Therefore, developing an efficient, safe and economical compressed air / nitrogen refining and filtering system to achieve deep purification of self-produced gas has become a technical problem to be solved urgently. Content of the Utility Model

[0004] In view of the above deficiencies in the prior art, the purpose of the present utility model is to provide a compressed air / nitrogen refining and filtering system for detecting carrier gas. Through the dual adsorption purification of activated carbon and molecular sieve, impurities, water vapor and polar molecules in the gas are effectively removed, ensuring that the output gas is dry and pure, meeting the strict requirements of detection equipment for carrier gas. At the same time, this system realizes the deep purification of self-produced gas, replaces the purchased steel cylinder gas with high cost and many safety hazards, significantly reduces the production cost and transportation and storage risks, and improves the production safety and economy.

[0005] The present utility model is implemented by adopting the following technical solutions:

[0006] The compressed air / nitrogen refining and filtering system for detecting carrier gas includes an activated carbon adsorption device and a molecular sieve adsorption device. The outlet of the activated carbon adsorption device is connected to the inlet of the molecular sieve adsorption device through a pipeline. The organic impurities in the compressed air or nitrogen are preliminarily filtered and removed through the activated carbon adsorption device, and the gas is further deeply purified through the molecular sieve adsorption device, especially to remove water vapor and other polar molecules, ensuring the dryness and high purity of the output gas. A component analyzer and a moisture analyzer are respectively provided on the outlet pipelines of the activated carbon adsorption device and the molecular sieve adsorption device, which are respectively used to monitor the gas components after being adsorbed by the activated carbon and the moisture content in the gas after being adsorbed by the molecular sieve in real time. The outlet of the molecular sieve adsorption device is connected to the inlet of the activated carbon adsorption device, the detection center and the storage tank through pipelines. The outlet of the storage tank is connected to the detection center through a pipeline. The unqualified gas filtered by the activated carbon adsorption device and the molecular sieve adsorption device returns to the inlet of the activated carbon adsorption device for secondary treatment again. The qualified gas is sent to the detection center for use or sent to the storage tank for standby. It also includes a compressed air / nitrogen pipeline. The outlet of the compressed air / nitrogen pipeline is connected to the detection center through a pipeline. When the compressed air / nitrogen refining and filtering system stops working, compressed air or nitrogen is supplied to the detection center in time through the compressed air / nitrogen pipeline to ensure sufficient detection carrier gas and maintain the normal operation of the detection instrument.

[0007] A booster pump and a first control valve are provided on the pipeline from the outlet of the molecular sieve adsorption device to the inlet of the activated carbon adsorption device. A second control valve is provided on the pipeline from the outlet of the molecular sieve adsorption device to the detection center. A third control valve is provided on the pipeline from the outlet of the molecular sieve adsorption device to the storage tank.

[0008] A compressed air / nitrogen control valve is provided on the compressed air / nitrogen pipeline.

[0009] A pressure monitoring device is provided on the inlet pipeline of the detection center, which is used to monitor the gas pressure entering the detection center in real time to ensure the normal supply of the detection carrier gas.

[0010] It also includes a control system, and the control system is electrically connected to the component analyzer, the moisture analyzer, the booster pump, the first control valve, the second control valve, the third control valve, the compressed air / nitrogen control valve and the pressure monitoring device respectively.

[0011] It also includes a fixing frame, which is used to support the activated carbon adsorption device and the molecular sieve adsorption device to ensure the structural stability.

[0012] Both the activated carbon adsorption device and the molecular sieve adsorption device include a top flange, a filler, a filter screen, a grid plate, a plug and a bottom flange arranged in sequence from top to bottom. The adsorption function is realized through the filler, and the filler is supported and prevented from flowing away through the filter screen, the grid plate and the plug. The replacement of the filler is realized through the disassembly of the top flange and the bottom flange.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] (1) The compressed air / nitrogen refining and filtering system for detection carrier gas described in the utility model can effectively remove organic impurities, water vapor and other polar molecules in self-produced compressed air or nitrogen through the combined use of an activated carbon adsorption device and a molecular sieve adsorption device, ensure the dryness and high purity of the output gas, and meet the strict requirements of the detection equipment for the carrier gas;

[0015] (2) The compressed air / nitrogen refining and filtration system for detection carrier gas described in the utility model realizes the deep purification of self-produced compressed air and nitrogen, replacing the finished gas contained in externally purchased steel cylinders, which not only greatly reduces the production cost, but also reduces the transportation, storage and use costs of the steel cylinders. In addition, it avoids the safety risks existing in the transportation, storage and use of steel cylinders, and reduces the safety hazards of the production environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the compressed air / nitrogen refining and filtering system for detecting carrier gas described in the utility model;

[0017] Figure 2 for Figure 1 A magnified view of the bottom structure of the activated carbon adsorption device and the molecular sieve adsorption device;

[0018] In the figure: 1. Activated carbon adsorption device; 2. Molecular sieve adsorption device; 3. Composition analyzer; 4. Moisture analyzer; 5. Testing center; 6. Storage tank; 7. Compressed air / nitrogen pipeline; 8. Booster pump; 9. Control valve No. 1; 10. Control valve No. 2; 11. Control valve No. 3; 12. Compressed air / nitrogen control valve; 13. Pressure monitoring device; 14. Fixed bracket; 15. Top flange; 16. Packing; 17. Filter; 18. Grate plate; 19. Plug; 20. Bottom flange. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] Example 1

[0021] like Figure 1-2As shown in the figure, the compressed air / nitrogen refining and filtering system for detecting carrier gas includes an activated carbon adsorption device 1 and a molecular sieve adsorption device 2. The outlet of the activated carbon adsorption device 1 is connected to the inlet of the molecular sieve adsorption device 2 through a pipeline. A component analyzer 3 and a moisture analyzer 4 are respectively arranged on the outlet pipelines of the activated carbon adsorption device 1 and the molecular sieve adsorption device 2. The outlet of the molecular sieve adsorption device 2 is connected to the inlet of the activated carbon adsorption device 1, a detection center 5 and a storage tank 6 through pipelines. The outlet of the storage tank 6 is connected to the detection center 5 through a pipeline. It also includes a compressed air / nitrogen pipeline 7, and the outlet of the compressed air / nitrogen pipeline 7 is connected to the detection center 5 through a pipeline.

[0022] A booster pump 8 and a first control valve 9 are arranged on the pipeline from the outlet of the molecular sieve adsorption device 2 to the inlet of the activated carbon adsorption device 1. A second control valve 10 is arranged on the pipeline from the outlet of the molecular sieve adsorption device 2 to the detection center 5. A third control valve 11 is arranged on the pipeline from the outlet of the molecular sieve adsorption device 2 to the storage tank 6.

[0023] A compressed air / nitrogen control valve 12 is arranged on the compressed air / nitrogen pipeline 7.

[0024] A pressure monitoring device 13 is arranged on the inlet pipeline of the detection center 5.

[0025] It also includes a control system, and the control system is electrically connected to the component analyzer 3, the moisture analyzer 4, the booster pump 8, the first control valve 9, the second control valve 10, the third control valve 11, the compressed air / nitrogen control valve 12 and the pressure monitoring device 13 respectively.

[0026] It also includes a fixing frame 14.

[0027] Both the activated carbon adsorption device 1 and the molecular sieve adsorption device 2 include a top flange 15, a packing 16, a filter screen 17, a grid plate 18, a plug 19 and a bottom flange 20 which are arranged in sequence from top to bottom.

[0028] During operation, the specific steps are as follows:

[0029] 1) Preliminary filtration by activated carbon:

[0030] Self-produced compressed air or nitrogen enters the activated carbon adsorption device 1 through a pipeline. In the activated carbon adsorption device 1, organic impurities in the gas are adsorbed by the activated carbon packing 16, and the preliminarily purified gas enters the molecular sieve adsorption device 2 through the outlet pipeline. At the same time, the component analyzer 3 monitors the gas components after adsorption by the activated carbon in real time to ensure the preliminary purification effect.

[0031] 2) Deep purification by molecular sieve:

[0032] The gas after preliminary purification enters the molecular sieve adsorption device 2 to further remove water vapor and other polar molecules therein. The high selective adsorption capacity of the molecular sieve ensures the dryness and high purity of the output gas. The purified gas is split into three directions through the outlet pipeline: returning to the activated carbon adsorption device 1, being sent to the detection center 5, or being stored in the storage tank 6.

[0033] 3) Gas quality monitoring and diversion:

[0034] The moisture analyzer 4 continuously monitors the moisture content in the gas after molecular sieve adsorption to ensure that it meets the preset standard. The control system judges whether the gas quality is qualified according to the feedback from the component analyzer 3 and the moisture analyzer 4.

[0035] If the gas is unqualified, the control system automatically opens the first control valve 9, starts the booster pump 8, and returns the unqualified gas to the inlet of the activated carbon adsorption device 1 for secondary treatment.

[0036] If the gas is qualified, the control system selects to open the second control valve 10 to send it directly to the detection center 5 for use according to the demand, or opens the third control valve 11 to store it in the storage tank 6 for standby.

[0037] 4) Backup gas source supply:

[0038] When the system stops working due to maintenance, repair or other reasons, the control system automatically switches to the standby mode, opens the compressed air / nitrogen control valve 12, and directly supplies compressed air or nitrogen to the detection center 5 through the compressed air / nitrogen pipeline 7 to ensure the continuous operation of the detection instruments.

[0039] 5) Pressure monitoring and safety protection:

[0040] The pressure monitoring device 13 installed on the inlet pipeline of the detection center 5 continuously monitors the gas pressure entering the detection center 5. Once abnormal pressure is detected, an alarm is immediately sent to the control system, and the start and stop of the control valves are used to ensure the safe and stable operation of the system.

[0041] 6) Packing replacement:

[0042] The processing effects of the activated carbon adsorption device 1 and the molecular sieve adsorption device 2 are judged simultaneously through the monitoring of the component analyzer 3 and the moisture analyzer 4. When the packing 16 in the activated carbon adsorption device 1 or the molecular sieve adsorption device 2 is saturated, the old packing 16 can be conveniently taken out and replaced with new packing 16 by removing the top flange 15 and the bottom flange, so as to maintain the purification efficiency of the system.

Claims

1. A compressed air / nitrogen refining and filtering system for detecting carrier gas, characterized in that: The invention comprises an activated carbon adsorption device (1) and a molecular sieve adsorption device (2), wherein the outlet of the activated carbon adsorption device (1) is connected to the inlet of the molecular sieve adsorption device (2) via a pipeline, and a component analyzer (3) and a moisture analyzer (4) are respectively arranged on the outlet pipelines of the activated carbon adsorption device (1) and the molecular sieve adsorption device (2); the outlet of the molecular sieve adsorption device (2) is respectively connected to the inlet of the activated carbon adsorption device (1), a detection center (5) and a storage tank (6) via pipelines, and the outlet of the storage tank (6) is connected to the detection center (5) via a pipeline; and the invention also comprises a compressed air / nitrogen pipeline (7), and the outlet of the compressed air / nitrogen pipeline (7) is connected to the detection center (5) via a pipeline.

2. The compressed air / nitrogen refining and filtering system for detection carrier gas according to claim 1, characterized in that: A booster pump (8) and a first control valve (9) are provided on the pipeline from the outlet of the molecular sieve adsorption device (2) to the inlet of the activated carbon adsorption device (1), a second control valve (10) is provided on the pipeline from the outlet of the molecular sieve adsorption device (2) to the detection center (5), and a third control valve (11) is provided on the pipeline from the outlet of the molecular sieve adsorption device (2) to the storage tank (6).

3. The compressed air / nitrogen refining and filtering system for detecting carrier gas according to claim 2, characterized in that: The compressed air / nitrogen pipeline (7) is provided with a compressed air / nitrogen control valve (12).

4. The compressed air / nitrogen refining and filtering system for detection carrier gas according to claim 3, characterized in that: A pressure monitoring device (13) is provided on the inlet pipeline of the detection center (5).

5. The compressed air / nitrogen refining and filtering system for detection carrier gas according to claim 4, characterized in that: The invention also includes a control system, which is electrically connected to the component analyzer (3), the moisture analyzer (4), the booster pump (8), the first control valve (9), the second control valve (10), the third control valve (11), the compressed air / nitrogen control valve (12) and the pressure monitoring device (13).

6. The compressed air / nitrogen refining and filtering system for detection carrier gas according to claim 5, characterized in that: Also included is a fixing frame (14).

7. The compressed air / nitrogen refining and filtering system for detection carrier gas according to claim 6, characterized in that: The activated carbon adsorption device (1) and the molecular sieve adsorption device (2) both comprise a top flange (15), a filler (16), a filter screen (17), a grate plate (18), a plug (19) and a bottom flange (20) which are arranged in sequence from top to bottom.

Images