Modular nitrogen generator
By designing a modular nitrogen generator, a stable supply and high-purity output of nitrogen are achieved using carbon molecular sieves and air filters. This solves the problems of unstable purity, high noise, and safety hazards of existing nitrogen generators, and improves the reliability and ease of operation of the equipment.
Patent Information
- Application Number
- CN202423032302.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Existing nitrogen generators suffer from problems such as unstable nitrogen purity, excessive noise, and safety hazards, which affect the accuracy and stability of experimental or production processes. They are also complex to operate and pose safety risks.
The nitrogen generator features a modular design, including a cabinet, base, adsorption cylinder, and multiple sets of carbon molecular sieves. The modular design ensures uninterrupted nitrogen supply, while the combination of air filter and silencer ensures nitrogen quality and noise control.
It achieves a stable supply and high-purity output of nitrogen, reduces noise, simplifies the operation process, and improves the safety and reliability of the equipment.
Smart Images
Figure CN223474711U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of nitrogen generators, and specifically relates to a modular nitrogen generator. Background Technology
[0002] A nitrogen generator is a device that produces pure nitrogen by separating oxygen from nitrogen in the air. It is widely used in laboratories, hospitals, and the electronics industry. However, during use, nitrogen generators may encounter some common problems that can affect their normal operation. The main function of a nitrogen generator is to provide high-purity nitrogen. Existing nitrogen generators have the following problems: First, the purity of the nitrogen produced is unstable, affecting the accuracy and stability of experiments or production processes. The reasons for unstable nitrogen purity may include unstable supply pressure, unstable supply temperature, and unstable supply quality. Second, the operating noise is excessive. Excessive noise during the use of a nitrogen generator may negatively impact the working environment and the health of personnel in the laboratory or production area. Third, components such as high-pressure gas cylinders and cryogenic liquid nitrogen storage tanks pose safety hazards. Appropriate safety management and employee operation training are required before use, which involves cumbersome procedures and is difficult to operate. Utility Model Content
[0003] To address the aforementioned problems and technical requirements, this utility model provides a modular nitrogen generator. This nitrogen generator adopts a modular design, is ready to use immediately, can supply nitrogen continuously, is convenient to use, provides a stable nitrogen supply, is easy and quick to use, and has high reliability.
[0004] The technical solution of this utility model is as follows: A modular nitrogen generator includes a cabinet, a base, adsorption cylinders, a top connecting gas pipe assembly, a bottom outlet gas pipe assembly, and a bottom bidirectional gas pipe assembly. The cabinet and adsorption cylinders are mounted on the base. The cabinet is a rectangular tall cabinet. Three sets of adsorption cylinders are fixedly installed on the side of the cabinet. The adsorption cylinders on both sides are filled with carbon molecular sieves, which can adsorb and generate nitrogen. The middle set of adsorption cylinders is empty. The bottom and top ports of the adsorption cylinders are sealed. The top connecting gas pipe assembly is located at the top of the cabinet. Each set of adsorption cylinders... The top side has a port that connects to the top connecting gas pipe assembly. The adsorption cylinders on both sides supply nitrogen to the empty adsorption cylinder in the middle through the top connecting gas pipe assembly. The bottom side of the adsorption cylinders on both sides has a port that connects to the bottom bidirectional gas pipe assembly. The bottom bidirectional gas pipe assembly can inject compressed air into the bottom of the adsorption cylinders on both sides. The adsorption cylinders on both sides work alternately to input the prepared nitrogen into the empty adsorption cylinder in the middle for storage. The bottom outlet gas pipe assembly is connected to the empty adsorption cylinder in the middle. The empty adsorption cylinder containing nitrogen outputs nitrogen to the outside through the bottom outlet gas pipe assembly.
[0005] Furthermore, the top connecting gas pipe assembly includes a nitrogen pipe, a fluid valve, and a connecting horizontal pipe. The three nitrogen pipes are respectively sealed and connected to three sets of adsorption cylinders. The other ends of the three nitrogen pipes are connected in parallel through the connecting horizontal pipe. Each nitrogen pipe is equipped with a fluid valve. Nitrogen gas can be input into the middle nitrogen pipe through the connecting horizontal pipe from both sides. The prepared nitrogen gas flows into the middle empty adsorption cylinder for storage through the middle nitrogen pipe.
[0006] Furthermore, the bottom bidirectional air pipe assembly includes an air supply pipe 1, an air supply pipe 2, a connecting horizontal pipe 1, a connecting horizontal pipe 2, an inlet long pipe, and an exhaust pipe. The ends of the air supply pipe 1 and the air supply pipe 2 are respectively connected to the adsorption cylinders on both sides. The other ends of the air supply pipe 1 and the air supply pipe 2 are connected through the connecting horizontal pipe 1. The connecting horizontal pipe 2 is also connected between the air supply pipe 1 and the air supply pipe 2. Both the connecting horizontal pipe 1 and the connecting horizontal pipe 2 are equipped with air flow valves to adjust the airflow. The upper part of the connecting horizontal pipe 2 is connected to the inlet long pipe. Compressed air is injected into the air supply pipe 1 and the air supply pipe 2 through the inlet long pipe. The upper part of the connecting horizontal pipe 1 is connected to the exhaust pipe. The exhaust gas in the adsorption cylinders on both sides is discharged to the outside through the air supply pipe 1, the air supply pipe 2, and the exhaust pipe.
[0007] Furthermore, an intake air filter is installed on the intake pipe to filter the incoming compressed air.
[0008] Furthermore, the bottom vent pipe assembly includes a main vent pipe, a qualified nitrogen vent pipe, a vent fluid valve, and a defective nitrogen discharge pipe. The bottom of the main vent pipe is connected to the bottom of the intermediate adsorption cylinder, and the upper section of the main vent pipe is connected to both the qualified nitrogen vent pipe and the defective nitrogen discharge pipe. Each of the qualified nitrogen vent pipe and the defective nitrogen discharge pipe is equipped with a vent fluid valve and a manual shut-off valve. The nitrogen flowing out from the main vent pipe can be discharged outward through either the qualified nitrogen vent pipe or the defective nitrogen discharge pipe.
[0009] Furthermore, an exhaust air filter is installed on the exhaust pipe.
[0010] Furthermore, a nitrogen purity detection port is also installed on the main exhaust pipe.
[0011] Furthermore, the port of the defective nitrogen exhaust pipe is connected to the exhaust gas pipe, and a silencer is installed on the port of the exhaust gas pipe.
[0012] Furthermore, a ventilation opening is provided on one side of the cabinet, and an operation panel and a pressure gauge are provided on the other side of the cabinet.
[0013] Furthermore, the bottom of the base is provided with a forklift groove.
[0014] The beneficial effects of this utility model are:
[0015] 1) This utility model does not require the setting of high-pressure gas cylinders and cryogenic liquid nitrogen storage tanks. The adsorption cylinder in the middle acts as a nitrogen storage cylinder. It can be used immediately and can supply nitrogen continuously. It eliminates the safety management and employee training required for using steel cylinders or liquid nitrogen, making the operation more convenient, safe and quick.
[0016] 2) The modular design of the upright cabinet has a small footprint and is expandable, allowing multiple units to be connected in parallel for easy expansion. The forklift groove at the bottom facilitates forklift handling and movement of the entire unit.
[0017] 3) The cabinet is equipped with two air filters, which can purify the compressed air entering the bottom of the adsorption tank and purify the discharged nitrogen gas, ensuring the cleanliness of the reaction gas and improving the stability of nitrogen quality. The silencer installed at the exhaust port can reduce the noise of the exhaust gas, thus greatly reducing the overall operating noise of the nitrogen generator.
[0018] 4) The adsorption cylinders on both sides can operate in a cycle, continuously supplying nitrogen to the empty adsorption cylinder in the middle, which can ensure a stable outflow of nitrogen and make the nitrogen supply to the outside evenly and stably. The multiple air flow valves set in the bottom bidirectional gas pipe assembly can ensure the stability of the compressed air flow into the adsorption tank and the stability of the discharged regeneration waste gas, which can greatly improve the operational stability of the entire equipment.
[0019] 5) The bottom vent pipe assembly can detect the purity of the discharged nitrogen and guide unqualified nitrogen to the exhaust pipe for discharge. Only nitrogen that meets the test standards can be supplied to the outside, further ensuring the purity and stability of the nitrogen supplied to the outside. Attached Figure Description
[0020] Figure 1 This utility model provides a three-dimensional modular nitrogen generator. Figure 1 ;
[0021] Figure 2 This utility model provides a three-dimensional modular nitrogen generator. Figure 2 ;
[0022] Figure 3 This is a structural diagram of the interior of the cabinet in this utility model;
[0023] Figure 4 This is a structural diagram of the top-connecting air pipe assembly in this utility model;
[0024] Figure 5 This is a layout diagram of the bottom air outlet pipe assembly and the bottom bidirectional air pipe assembly in this utility model;
[0025] Figure 6 This is a structural diagram of the bottom air outlet pipe assembly in this utility model;
[0026] Figure 7 This is a structural diagram of the bottom bidirectional air tube assembly in this utility model;
[0027] The components in the diagram are marked as follows: cabinet 1, vent 11, control panel 12, pressure gauge 13, base 2, forklift recess 12, adsorption cylinder 3, top connecting air pipe assembly 4, nitrogen pipe 41, fluid valve 42, connecting horizontal pipe 43, bottom air outlet assembly 51, main air outlet pipe 511, qualified nitrogen outlet pipe 512, defective nitrogen outlet pipe 513, air outlet air filter valve 514, air outlet fluid valve 515, manual shut-off valve 516, nitrogen purity detection port 517, bottom bidirectional air pipe assembly 52, air supply pipe one 521, air supply pipe two 522, connecting horizontal pipe one 523, connecting horizontal pipe two 524, long air inlet pipe 525, exhaust pipe 526, airflow valve 527, air inlet air filter 528, silencer 529. Detailed Implementation
[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0029] like Figure 1-7 The diagram shows a modular nitrogen generator according to this utility model, comprising a cabinet 1, a base 2, adsorption cylinders 3, a top connecting gas pipe assembly 4, a bottom gas outlet pipe assembly 51, and a bottom bidirectional gas pipe assembly 52. The cabinet 1 and adsorption cylinders 3 are mounted on the base 2. The cabinet 1 is a rectangular tall cabinet. Three sets of adsorption cylinders 3 are fixedly mounted on the side of the cabinet 1. The adsorption cylinders 3 on both sides are filled with carbon molecular sieves, which can adsorb and generate nitrogen. The middle set of adsorption cylinders is empty. The bottom and top ports of the adsorption cylinders 3 are sealed. The top connecting gas pipe assembly 4 is located at the top inside the cabinet. Each set of adsorption cylinders 3... The top side is provided with a port that connects to the top connecting air pipe assembly 4. The adsorption cylinders 3 on both sides supply nitrogen gas to the empty adsorption cylinder in the middle through the top connecting air pipe assembly 4. The bottom side of the adsorption cylinders 3 on both sides is provided with a port that connects to the bottom bidirectional air pipe assembly 52. The bottom bidirectional air pipe assembly 52 can inject compressed air into the bottom of the adsorption cylinders on both sides. The adsorption cylinders on both sides work alternately to input the prepared nitrogen gas into the empty adsorption cylinder in the middle for storage. The bottom outlet pipe assembly 51 is connected to the empty adsorption cylinder in the middle. The empty adsorption cylinder containing nitrogen gas outputs nitrogen gas to the outside through the bottom outlet pipe assembly 51.
[0030] The cabinet 1 has a ventilation opening 11 on its body. The cabinet 1 has an operation panel 12 and a pressure gauge 13 on its outer side. The base 2 has a forklift groove 12 at its bottom.
[0031] The adsorption cylinders 3 on both sides are filled with carbon molecular sieves. During operation, when compressed air passes through the adsorption cylinder from bottom to top, oxygen, carbon dioxide, and moisture are adsorbed by the carbon molecular sieves, while nitrogen cannot be adsorbed and flows out from the top of the cylinder after passing through the carbon molecular sieves. When the carbon molecular sieves in the cylinder are saturated, they need to be regenerated. Regeneration means venting the gas in the adsorption cylinder to the atmosphere to rapidly reduce the pressure to normal pressure, so that the oxygen, carbon dioxide, and moisture adsorbed by the carbon molecular sieves are released into the atmosphere.
[0032] In this device, the bottom bidirectional gas pipe assembly 5 supplies gas to the bottom of the adsorption cylinder 3, while the top connecting gas pipe assembly 4 outputs nitrogen gas to the middle empty adsorption cylinder. The middle empty adsorption cylinder acts as a nitrogen storage tank, so there is no need to set up a separate storage tank, and the size of the device is correspondingly reduced. The top connecting gas pipe assembly 4 includes a nitrogen pipe 41, a fluid valve 42, and a connecting horizontal pipe 43. The three nitrogen pipes 41 are respectively sealed and connected to the three sets of adsorption cylinders 3. The other ends of the three nitrogen pipes 41 are connected in parallel through the connecting horizontal pipe 43. Each nitrogen pipe 41 is equipped with a fluid valve 42. The nitrogen pipes 41 on both sides can input nitrogen gas into the middle nitrogen pipe 41 through the connecting horizontal pipe 43. The prepared nitrogen gas flows into the middle empty adsorption cylinder for storage through the middle nitrogen pipe 41.
[0033] The bottom bidirectional air pipe assembly 52 includes an air supply pipe 1 521, an air supply pipe 2 522, a connecting horizontal pipe 1 523, a connecting horizontal pipe 2 524, an air inlet long pipe 525, and an exhaust pipe 526. The ends of the air supply pipe 1 521 and the air supply pipe 2 522 are respectively connected to the adsorption cylinders 3 on both sides. The other ends of the air supply pipe 1 521 and the air supply pipe 2 522 are connected through the connecting horizontal pipe 1 524. The connecting horizontal pipe 2 526 is also connected between the air supply pipe 1 521 and the air supply pipe 2 522. 23. Both the first horizontal pipe 523 and the second horizontal pipe 524 are equipped with airflow valves 527 to regulate airflow. An inlet pipe 525 is connected above the second horizontal pipe 523. Compressed air is injected into the first air supply pipe 521 and the second air supply pipe 522 through the inlet pipe 525. An exhaust pipe 526 is connected above the first horizontal pipe 523. Exhaust gas in the adsorption cylinders 3 on both sides is discharged outwards through the first air supply pipe 521, the second air supply pipe 522, and the exhaust pipe 526. An intake air filter 528 is installed on the inlet pipe 525 to filter the incoming compressed air.
[0034] The bottom vent pipe assembly 51 includes a main vent pipe 511, a qualified nitrogen vent pipe 512, a vent fluid valve 515, and a defective nitrogen discharge pipe 513. The bottom of the main vent pipe 511 is connected to the bottom of the intermediate adsorption cylinder. The upper section of the main vent pipe 511 is connected to both the qualified nitrogen vent pipe 512 and the defective nitrogen discharge pipe 513. Each of the qualified nitrogen vent pipe 512 and the defective nitrogen discharge pipe 513 is equipped with a vent fluid valve 515 and a manual shut-off valve 516. Nitrogen flowing out of the main vent pipe 511 can be discharged outward through either the qualified nitrogen vent pipe 512 or the defective nitrogen discharge pipe 513. An air filter 514 is installed on the main vent pipe 511, and a nitrogen purity detection port 517 is also installed on the main vent pipe 511. The port of the defective nitrogen discharge pipe 513 is connected to an exhaust pipe 526, and a silencer 529 is installed on the port of the exhaust pipe 526.
[0035] The operating principle of this utility model is as follows: The adsorption cylinders on both sides of this device operate in a cycle, which can be regarded as Group A and Group B. After the adsorption cylinder of Group A is saturated, it switches to Group B through the top connecting gas pipe assembly 4 to perform adsorption nitrogen production. While Group B is operating, Group A releases waste gas through the bottom bidirectional gas pipe assembly 52 for regeneration. The cycle operation can ensure a continuous supply of nitrogen. The operation process is as follows: Compressed air is injected from the outside through the long inlet pipe 525. After being purified by the inlet air filter 528, the compressed air enters the adsorption cylinder of group A through the first air supply pipe 521. At this time, the second air supply pipe 522 is closed. The adsorption cylinder of group A adsorbs and produces nitrogen. Nitrogen flows from the top nitrogen pipe into the middle nitrogen pipe and the middle empty adsorption cylinder. At this time, the top nitrogen pipe of group B is closed, and nitrogen is stored in the middle empty adsorption cylinder. After the nitrogen is full, it flows out from the outlet pipe 511. The outlet air filter valve 514 purifies the outflowing nitrogen. The purity of the nitrogen that just flows out is unstable, so the qualified nitrogen outlet pipe 512 is closed, and the nitrogen that does not meet the purity standard is discharged through the poor nitrogen discharge pipe 513. Nitrogen flows out from the exhaust pipe, and its concentration is continuously monitored through the nitrogen purity detection port 517. When the nitrogen concentration meets the standard, the defective nitrogen exhaust pipe 513 is closed, and the qualified nitrogen exhaust pipe 512 is opened to supply nitrogen to the outside. When the adsorption cylinder of group A is saturated, the nitrogen pipe and supply pipe 1 of group A are closed, and the nitrogen pipe and supply pipe 2 of group B are opened. Group A is regenerated, and group B continues to adsorb and produce nitrogen. The waste gas and moisture of group A flow out in reverse from supply pipe 1 521 to the exhaust pipe 526. The silencer 529 can reduce the noise generated by the exhaust gas. When the regeneration of group A is completed and group B is saturated, the working state of the two groups is switched again, and the cycle is repeated to ensure a stable supply of nitrogen.
[0036] The above descriptions are merely several preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations and substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.
Claims
1. A modular nitrogen generator, characterized in that: The system includes a cabinet, a base, adsorption cylinders, a top connecting gas pipe assembly, a bottom outlet gas pipe assembly, and a bottom bidirectional gas pipe assembly. The cabinet and adsorption cylinders are mounted on the base. The cabinet is a rectangular tall cabinet with three sets of adsorption cylinders fixedly installed on its sides. The adsorption cylinders on the two sides are filled with carbon molecular sieves, which can adsorb and produce nitrogen. The middle adsorption cylinder is empty. The bottom and top ports of the adsorption cylinders are sealed. The top connecting gas pipe assembly is located at the top of the cabinet. Each set of adsorption cylinders has a port on the side of its top that connects to the top connecting gas pipe assembly. The adsorption cylinders on the two sides supply nitrogen to the empty adsorption cylinder in the middle through the top connecting gas pipe assembly. The side of the bottom of the adsorption cylinders on the two sides has a port that connects to the bottom bidirectional gas pipe assembly. The bottom bidirectional gas pipe assembly can inject compressed air into the bottom of the adsorption cylinders on the two sides. The adsorption cylinders on the two sides work alternately, inputting the prepared nitrogen into the empty adsorption cylinder in the middle for storage. The bottom outlet gas pipe assembly is connected to the empty adsorption cylinder in the middle, and the empty adsorption cylinder containing nitrogen outputs nitrogen out through the bottom outlet gas pipe assembly.
2. The modular nitrogen generator according to claim 1, characterized in that: The top connecting gas pipe assembly includes a nitrogen pipe, a fluid valve, and a connecting horizontal pipe. The three nitrogen pipes are respectively sealed and connected to three sets of adsorption cylinders. The other ends of the three nitrogen pipes are connected in parallel through the connecting horizontal pipe. Each nitrogen pipe is equipped with a fluid valve. Nitrogen gas can be input into the middle nitrogen pipe through the connecting horizontal pipe from both sides. The prepared nitrogen gas flows into the middle empty adsorption cylinder for storage through the middle nitrogen pipe.
3. A modular nitrogen generator according to claim 2, characterized in that: The bottom bidirectional air pipe assembly includes an air supply pipe 1, an air supply pipe 2, a connecting horizontal pipe 1, a connecting horizontal pipe 2, an inlet long pipe, and an exhaust pipe. The ends of air supply pipe 1 and air supply pipe 2 are respectively connected to the adsorption cylinders on both sides. The other ends of air supply pipe 1 and air supply pipe 2 are connected through the connecting horizontal pipe 1. The connecting horizontal pipe 2 is also connected between air supply pipe 1 and air supply pipe 2. Both connecting horizontal pipe 1 and connecting horizontal pipe 2 are equipped with air flow valves to adjust the airflow. The upper part of the connecting horizontal pipe 2 is connected to the inlet long pipe. Compressed air is injected into air supply pipe 1 and air supply pipe 2 through the inlet long pipe. The upper part of the connecting horizontal pipe 1 is connected to the exhaust pipe. The exhaust gas in the adsorption cylinders on both sides is discharged to the outside through air supply pipe 1, air supply pipe 2, and exhaust pipe.
4. A modular nitrogen generator according to claim 3, characterized in that: An intake air filter is installed on the intake pipe to filter the incoming compressed air.
5. A modular nitrogen generator according to claim 4, characterized in that: The bottom vent pipe assembly includes a main vent pipe, a qualified nitrogen vent pipe, a vent fluid valve, and a defective nitrogen discharge pipe. The bottom of the main vent pipe is connected to the bottom of the intermediate adsorption cylinder, and the upper section of the main vent pipe is connected to both the qualified nitrogen vent pipe and the defective nitrogen discharge pipe. Each of the qualified nitrogen vent pipe and the defective nitrogen discharge pipe is equipped with a vent fluid valve and a manual shut-off valve. The nitrogen flowing out from the main vent pipe can be discharged outward through either the qualified nitrogen vent pipe or the defective nitrogen discharge pipe.
6. A modular nitrogen generator according to claim 5, characterized in that: An air filter is installed on the main exhaust pipe.
7. A modular nitrogen generator according to claim 6, characterized in that: The main exhaust pipe is also equipped with a nitrogen purity detection port.
8. A modular nitrogen generator according to claim 7, characterized in that: The port of the defective nitrogen discharge pipe is connected to the exhaust gas pipe, and a silencer is installed on the port of the exhaust gas pipe.
9. A modular nitrogen generator according to claim 8, characterized in that: The cabinet has a ventilation opening on one side and an operation panel and pressure gauge on the other side.
10. A modular nitrogen generator according to claim 9, characterized in that: The base has a forklift groove at its bottom.