Zero-gas-consumption PSA (Pressure Swing Adsorption) nitrogen making device

Abstract

The invention belongs to the technical field of nitrogen making equipment, and particularly relates to a zero-gas-consumption PSA nitrogen making device which comprises a fixing frame, the upper portion of the fixing frame is fixedly connected with a purification part, and the purification part can compress, filter and purify input air so as to remove impurities in the air; the purification part is connected with an adsorption part, and the adsorption part can filter the pumped air, so that oxygen, carbon dioxide and moisture in the air are adsorbed, and nitrogen is left; the adsorption part is connected with a buffer part, and the buffer part can collect nitrogen generated by the adsorption part; the adsorption part comprises at least two reaction tanks, the reaction tanks are connected through a pipeline with a valve, and the lower ends of the reaction tanks are fixedly connected with the fixing frame. According to the invention, by optimizing the adsorption circulation and desorption processes, the nitrogen flowing in the system is utilized for regeneration, and the situation that additional nitrogen or other gases are needed for regeneration in the traditional PSA system is avoided, so that zero gas consumption is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of nitrogen production equipment, and in particular relates to a zero-gas-consumption PSA nitrogen production device. Background Art

[0002] The zero-gas consumption pressure swing adsorption (PSA) nitrogen production device is an efficient and environmentally friendly nitrogen production technology. Its technical background involves many aspects, including the gas separation principle, the limitations of traditional nitrogen production methods and the advantages of new technologies.

[0003] Nitrogen is a widely used gas in industry, mainly used in chemical, electronic, metallurgical, food packaging, pharmaceutical and other fields. The demand for nitrogen is increasing, so it is particularly important to develop efficient nitrogen production technology;

[0004] In traditional PSA systems, additional nitrogen or other gases are required for regeneration, which increases the operating cost and energy consumption of the equipment. Summary of the invention

[0005] The purpose of the present invention is to provide a zero-gas-consumption PSA nitrogen production device, which can optimize the adsorption cycle and desorption process and utilize the nitrogen flowing inside the system for regeneration, thereby avoiding the need for additional nitrogen or other gases for regeneration in traditional PSA systems, thereby achieving zero gas consumption.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A zero-gas-consumption PSA nitrogen generator comprises a fixing frame, the upper part of which is fixedly connected with a purification unit, and the purification unit can compress and filter the input air to remove impurities in the air;

[0008] The purification unit is connected to an adsorption unit, which can filter the pumped air so that oxygen, carbon dioxide and moisture in the air are adsorbed to leave nitrogen;

[0009] The adsorption part is connected to a buffer part, and the buffer part can collect the nitrogen generated by the adsorption part;

[0010] The adsorption part includes a reaction tank, a diffusion seat, a diffusion plate, a support plate, an adsorbent, a fixed plate, a sliding seat, a stroke alarm and a one-way air extraction valve. The reaction tank is provided with at least two seats, and the reaction tanks are connected by a pipe with a valve. The lower end of the reaction tank is fixedly connected to the fixed frame, and the lower end of the reaction tank is connected to the inlet and outlet of the purification part through a pipe. The diffusion seat is fixedly connected to the lower end of the reaction tank. The diffusion plate is arranged at the lower end inside the reaction tank. The support plate is arranged on the upper part of the diffusion plate, and the support plate is fixedly connected to the interior of the lower end of the reaction tank. The support plate is arranged in the interior of the reaction tank, and the adsorbent is arranged on the upper part of the support plate. The fixed plate is fixedly arranged at the upper end of the reaction tank. The upper end of the sliding seat is slidably arranged in the interior of the fixed plate, and the lower end of the sliding seat contacts the upper end of the adsorbent. The stroke alarm is fixedly arranged at the upper end of the fixed plate, and the stroke alarm cooperates with the upper end of the sliding seat. The output end of the one-way air extraction valve is arranged between the fixed plate and the sliding seat.

[0011] In a preferred embodiment, a plurality of spiral air guide grooves are provided in the entire interior of the diffuser plate.

[0012] In a preferred embodiment, the support plate is an industrial coconut board, which is a filter material made of coconut shell or coconut fiber.

[0013] In a preferred embodiment, the material used for the adsorbent is carbon molecular sieve.

[0014] In a preferred solution, through holes are provided at the lower ends of the fixing plate and the sliding seat.

[0015] In a preferred embodiment, the purification unit includes a control console, an air pump, an air intake seat, a booster pump, a filter tank, a guide plate and air filter material. The control console is fixedly connected to a fixed frame, the air pump is fixedly connected to the inside of the control console, the air intake seat is fixedly connected to the input end of the air pump, the input end of the booster pump is also fixedly connected to the air intake seat, the output end of the booster pump is fixedly connected to the input end of the one-way air intake valve, the lower end of the filter tank is fixedly connected to the fixed frame, the lower end of the filter tank is connected to the output end of the air pump, the guide plate is fixedly arranged inside the filter tank, and the air filter material is filled inside the filter tank.

[0016] In a preferred solution, the guide plate is configured as a whole in a spiral shape.

[0017] In a preferred embodiment, the air inlet seat is divided into a double-layer design of an inner tube and an outer cover, and the outer cover is provided with a plurality of through holes.

[0018] In a preferred embodiment, the buffer part includes an extraction seat, an extraction pump, a pressure relief valve, a connecting pipe and a gas storage tank. The extraction seat is fixedly arranged at the upper end of the reaction tank, the extraction pump is fixedly arranged inside the extraction seat, and the input end of the extraction pump is connected to the interior of the reaction tank, the pressure relief valve is arranged inside the extraction seat, and the pressure relief valve is connected to the interior of the reaction tank, one end of the connecting pipe is fixedly connected to the output end of the extraction pump, the lower end of the gas storage tank is fixedly connected to the fixed frame, and the interior of the gas storage tank is connected to the other end of the connecting pipe.

[0019] In a preferred embodiment, a plurality of partitions are arranged inside the gas storage tank, and the partitions are arranged in a wave shape.

[0020] The technical effects achieved by the present invention are:

[0021] The present invention adopts the design of the purification part. The control console controls the air delivery pump to extract the air at the air inlet seat and pump it into the interior of the filter tank. The air is filtered and purified at the air filter material inside the filter tank to remove solid impurities in the air, so as to prevent the solid impurities from contaminating the adsorbent, causing the adsorbent to be blocked and thus reducing the filtration efficiency of the adsorbent; the pressure pump provides high-pressure air to the input end of the one-way air extraction valve, thereby providing extrusion power for the sliding seat to slide inside the fixed plate;

[0022] The present invention adopts the design of the adsorption part. When the adsorbent adsorbs oxygen and is in a saturated state, the pipeline is closed to stop the input of high-pressure air inside the reaction tank, and the external valve on the pipeline is opened to discharge the high-pressure gas inside the reaction tank, so that the pressure inside the reaction tank is reduced. When the pressure inside the reaction tank is reduced, the adsorbent's adsorption capacity for gas is weakened, especially the adsorption of oxygen, causing oxygen to begin to desorb and be discharged from the inside of the reaction tank. At the same time, the newly produced nitrogen is reintroduced into the inside of the reaction tank through the pipeline. The nitrogen molecules will replace the oxygen molecules of the adsorbent. The adsorbent has a low affinity for nitrogen, and is replaced by the adsorbed oxygen. As a result, the oxygen is replaced and released again, accelerating the adsorbent to recover to an unsaturated state, thereby achieving zero gas consumption.

[0023] The present invention adopts the design of the buffer part, and the partition is set to be wavy. The wavy partition can increase its elasticity and deformation ability, so that the pressure can be evenly distributed when the gas impacts, thereby reducing the local stress concentration and absorbing the impact energy when the nitrogen is discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall schematic diagram of an embodiment of the present invention;

[0025] Figure 2 is an overall back view of an embodiment of the present invention;

[0026] Figure 3is an overall front view of an embodiment of the present invention;

[0027] Figure 4 It is a partial schematic diagram of a purification unit of an embodiment of the present invention;

[0028] Figure 5 is a schematic diagram of the interior of a filter tank according to an embodiment of the present invention;

[0029] Figure 6 is an exploded view of an adsorption portion of an embodiment of the present invention;

[0030] Figure 7 is a schematic diagram of a diffusion seat and a diffusion plate according to an embodiment of the present invention;

[0031] Figure 8 is a side cross-sectional view of an adsorption portion of an embodiment of the present invention;

[0032] Fig. 9 is a schematic diagram of the interior of a gas storage tank according to an embodiment of the present invention;

[0033] Fig.10 is a side sectional view of a gas storage tank according to an embodiment of the present invention;

[0034] Fig.11 An embodiment of the present invention Fig.10 Schematic diagram at point A in the middle.

[0035] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0036] 1. Fixed frame; 2. Purification unit; 201. Control console; 202. Air pump; 203. Air inlet seat; 2031. Inner tube; 2032. Outer cover; 204. Pressure pump; 205. Filter tank; 206. Guide plate; 207. Air filter material; 3. Adsorption unit; 301. Reaction tank; 302. Diffusion seat; 303. Diffusion plate; 304. Support plate; 305. Adsorbent; 306. Fixed plate; 307. Sliding seat; 308. Travel alarm; 309. One-way air extraction valve; 4. Buffer unit; 401. Extraction seat; 402. Extraction pump; 403. Pressure relief valve; 404. Connecting pipe; 405. Air storage tank; 4051. Partition. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0040] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0041] See also Figures 1 to 11 As shown, the present invention provides a zero-gas-consumption PSA nitrogen-generating device, comprising a fixing frame 1, a purification unit 2 is fixedly connected to the upper portion of the fixing frame 1, and the purification unit 2 can compress and filter the input air to remove impurities in the air;

[0042] The purification unit 2 is connected to the adsorption unit 3, which can filter the pumped air so that the oxygen in the air is adsorbed and nitrogen is left;

[0043] The adsorption part 3 is connected with a buffer part 4, and the buffer part 4 can collect the nitrogen generated by the adsorption part 3;

[0044] The adsorption part 3 includes a reaction tank 301, a diffusion seat 302, a diffusion plate 303, a support plate 304, an adsorbent 305, a fixed plate 306, a sliding seat 307, a travel alarm 308 and a one-way air extraction valve 309. The reaction tank 301 is provided with at least two seats, and the reaction tanks 301 are connected by a pipeline with a valve. The lower end of the reaction tank 301 is fixedly connected to the fixed frame 1, and the lower end of the reaction tank 301 is connected to the inlet and outlet of the purification part 2 through a pipeline. The diffusion seat 302 is fixedly connected to the lower end of the reaction tank 301, the diffusion plate 303 is arranged at the lower end of the reaction tank 301, and the support plate 304 is arranged at the diffusion plate 303. The support plate 304 is fixedly connected to the interior of the lower end of the reaction tank 301, the support plate 304 is arranged inside the reaction tank 301, and the adsorbent 305 is arranged on the upper part of the support plate 304, the fixed plate 306 is fixedly arranged at the upper end of the reaction tank 301, the upper end of the sliding seat 307 is slidably arranged inside the fixed plate 306, and the lower end of the sliding seat 307 is in contact with the upper end of the adsorbent 305, the travel alarm 308 is fixedly arranged on the upper end of the fixed plate 306, and the travel alarm 308 cooperates with the upper end of the sliding seat 307, and the output end of the one-way air extraction valve 309 is arranged between the fixed plate 306 and the sliding seat 307.

[0045] Specifically, during the nitrogen production process, air is first filtered and compressed by the purification unit 2 and discharged into the adsorption unit 3;

[0046] It should be noted that the compressed purified air first enters one of the corresponding reaction tanks 301 through a pipeline for filling, and the other reaction tanks 301 are closed by switches at the pipelines;

[0047] When the compressed air enters the interior of the reaction tank 301, the compressed air is first diffused through the guide inside the diffusion seat 302, and the diffused compressed air is further diffused into smaller airflows through the interior of the diffusion plate 303, so that the diffused airflow can pass through the interior of the adsorbent 305 more evenly, thereby improving the utilization rate of the adsorbent 305, thereby improving the gas production efficiency and performance of the equipment;

[0048] After the compressed air first enters the interior of the adsorbent 305, the oxygen in the compressed air is adsorbed due to the interaction with the interior of the adsorbent 305, so that the adsorbent 305 enters the adsorption stage, while the nitrogen that is not easily adsorbed by the adsorbent 305 enters the air outlet at the upper end of the reaction tank 301, thereby achieving the separation of nitrogen. The separated nitrogen is extracted and stored through the buffer part 4;

[0049] When the adsorbent 305 is in a saturated state due to the adsorption of oxygen, the pipeline is closed to stop the input of high-pressure air into the reaction tank 301, and the external valve on the pipeline is opened to discharge the high-pressure gas inside the reaction tank 301, so that the pressure inside the reaction tank 301 is reduced (usually it is switched to a low-pressure state). When the pressure inside the reaction tank 301 is reduced, the adsorbent 305's ability to adsorb gas is weakened, especially the adsorption of oxygen, causing oxygen to begin to desorb and be discharged from the inside of the reaction tank 301. At the same time, the newly produced nitrogen is reintroduced into the inside of the reaction tank 301 through the pipeline. The nitrogen molecules will replace the oxygen molecules of the adsorbent 305. The adsorbent 305 has a low affinity for nitrogen, and is replaced by the adsorbed oxygen. As a result, the oxygen is replaced and released again, accelerating the adsorbent 305 to recover to an unsaturated state, thereby achieving zero gas consumption.

[0050] During the process of the adsorbent 305 adsorbing compressed air, high-pressure air is discharged between the sliding seat 307 and the fixed plate 306 through the one-way air extraction valve 309, so that the sliding seat 307 can extend out of the fixed plate 306. The extension of the fixed plate 306 can squeeze the adsorbent 305. The position of the sliding seat 307 is detected by the travel alarm 308, and the detection data is sent to the inside of the console 201, so that the whole of the adsorbent 305 is more compact, can better resist external mechanical stress, extend the service life, and can also improve the arrangement between particles, make the pores smoother, and improve the adsorption capacity of substances; it can also reduce the porosity of the material, increase the overall density, and enhance the stability and reliability of the molecular sieve;

[0051] While waiting for the adsorbent 305 inside this reaction tank 301 to recover, the compressed air is switched to the inside of the next reaction tank 301 that has not been adsorbed through a pipeline. By switching multiple reaction tanks 301, the adsorbent 305 inside different reaction tanks 301 has sufficient adsorption or desorption time, thereby achieving continuous production of nitrogen.

[0052] See also Figures 6 to 8 As shown, a plurality of spiral air guide grooves are provided inside the diffuser plate 303. The spiral air guide grooves allow the airflow entering the diffuser seat 302 to be changed into a spiral upward direction through the diffuser plate 303, so that the airflow is diffused around the inside of the reaction tank 301, and the airflow passing time (adsorption time) inside the reaction tank 301 can be prolonged, thereby improving the adsorption rate.

[0053] See also Figure 6 and Figure 8 As shown, the support plate 304 is industrial coconut board, which is a filter material made of coconut shell or coconut fiber. The pore structure formed by the coconut shell after processing is relatively uniform, which can effectively capture and filter out particulate matter in water or air. This porosity enables the coconut board to provide a larger filtering area during the filtering process.

[0054] See also Figure 6 and Figure 8 As shown, the material used for the adsorbent 305 is a carbon molecular sieve. The pore size design of the carbon molecular sieve enables it to selectively adsorb small molecules, such as oxygen, carbon dioxide and water vapor, but has almost no adsorption capacity for larger nitrogen molecules, thereby completing the production of nitrogen.

[0055] See also Figure 6 and Figure 8 As shown, the lower ends of the fixed plate 306 and the sliding seat 307 are both provided with through holes. The mesh through holes are light, high-strength and have good permeability, ensuring that the sliding seat 307 can apply pressure to the adsorbent 305 and can also allow the gas inside the adsorbent 305 to be smoothly discharged through the mesh through holes.

[0056] See also Figures 1 to 5 As shown, the purification unit 2 includes a control console 201, an air delivery pump 202, an air intake seat 203, a booster pump 204, a filter tank 205, a guide plate 206 and an air filter material 207. The control console 201 is fixedly connected to the fixing frame 1, the control console 201 is connected to the mains, the air delivery pump 202 is fixedly connected to the inside of the control console 201, the air intake seat 203 is fixedly connected to the input end of the air delivery pump 202, and the input end of the booster pump 204 is also fixedly connected to the air intake seat 203. The outlet is fixedly connected to the input end of the one-way air extraction valve 309, the lower end of the filter tank 205 is fixedly connected to the fixing frame 1, the lower end of the filter tank 205 is connected to the output end of the air delivery pump 202, the guide plate 206 is fixedly arranged inside the filter tank 205, the air filter material 207 is filled inside the filter tank 205, and the console 201 is electrically connected to the air delivery pump 202, the booster pump 204, the travel alarm 308, the one-way air extraction valve 309, the extraction pump 402 and the pressure relief valve 403;

[0057] The console 201 is internally integrated with a processor and control buttons; the console 201 controls the air delivery pump 202 to extract the air at the air inlet seat 203 and pump it into the filter tank 205, and the air is filtered and purified at the air filter material 207 inside the filter tank 205 to remove solid impurities in the air, so as to prevent the solid impurities from contaminating the adsorbent 305, causing the adsorbent 305 to be blocked, thereby reducing the filtering efficiency of the adsorbent 305;

[0058] The pressure pump 204 provides high-pressure air to the input end of the one-way air extraction valve 309 , thereby providing squeezing power for the sliding seat 307 to slide inside the fixed plate 306 .

[0059] See also Figure 5 As shown, the guide plate 206 is generally arranged in a spiral shape. The spiral shape design can effectively increase the contact area of ​​the airflow on the air filter material 207, thereby increasing the contact probability between the particulate matter and the air filter material 207, making the filtration efficiency higher; compared with the traditional straight-through filter, the spiral air guide structure can better manage the direction of the airflow, reduce the pressure loss generated when the airflow passes through the filter medium, and thus improve the overall energy efficiency of the system.

[0060] See also Figure 4 As shown, the air intake seat 203 is divided into a double-layer design of an inner tube 2031 and an outer cover 2032. The outer cover 2032 is provided with a plurality of through holes, and the plurality of through holes can inhale gas at different positions, thereby achieving a more uniform gas distribution, avoiding airflow concentration at a single position, and improving the overall gas processing efficiency; the design of multiple through holes can effectively disperse the air intake points and reduce the risk of blockage. The double-layer structure is convenient for cleaning and maintenance. The design of the outer cover 2032 allows users to perform daily inspections and maintenance more easily.

[0061] See also Figures 1 to 3 as well as Figures 9 to 11 As shown, the buffer part 4 includes an extraction seat 401, an extraction pump 402, a pressure relief valve 403, a connecting pipe 404 and an air storage tank 405, the extraction seat 401 is fixedly arranged at the upper end of the reaction tank 301, the extraction pump 402 is fixedly arranged inside the extraction seat 401, and the input end of the extraction pump 402 is connected to the inside of the reaction tank 301, the pressure relief valve 403 is arranged inside the extraction seat 401, and the pressure relief valve 403 is connected to the inside of the reaction tank 301, one end of the connecting pipe 404 is fixedly connected to the output end of the extraction pump 402, the lower end of the air storage tank 405 is fixedly connected to the fixed frame 1, and the inside of the air storage tank 405 is connected to the other end of the connecting pipe 404;

[0062] After the nitrogen in the reaction tank 301 is separated, the nitrogen in the reaction tank 301 is extracted through the input end of the extraction pump 402 and pumped to the inside of the gas storage tank 405 through the connecting pipe 404 for storage, thereby completing the transportation and storage of the nitrogen;

[0063] The pressure relief valve 403 is used as a switch to connect the reaction tank 301 with the external air, thereby discharging the corresponding high-pressure gas inside the reaction tank 301, restoring the internal pressure of the reaction tank 301, and allowing the adsorbent 305 to enter a desorption state and release the adsorbed oxygen.

[0064] See also Figures 9 to 11 As shown, a plurality of partitions 4051 are arranged inside the gas storage tank 405, and the partitions 4051 are arranged in a wavy shape. The wavy partitions 4051 can increase its elasticity and deformation capacity, so that the pressure can be evenly distributed when the gas impacts, thereby reducing the local stress concentration and absorbing the impact energy when the nitrogen is discharged.

[0065] The working principle of the present invention is as follows: during the nitrogen production process, air is firstly discharged into the interior of the adsorption part 3 through filtration and compression of the purification part 2;

[0066] It should be noted that the compressed purified air first enters one of the corresponding reaction tanks 301 through a pipeline for filling, and the other reaction tanks 301 are closed by switches at the pipelines;

[0067] When the compressed air enters the reaction tank 301, the compressed air is first diffused through the guide inside the diffusion seat 302, and the diffused compressed air is further diffused into smaller airflows through the inside of the diffusion plate 303, so that the diffused airflow can pass through the inside of the adsorbent 305 more evenly, thereby improving the utilization rate of the adsorbent 305, thereby improving the gas production efficiency and performance of the equipment;

[0068] After the compressed air first enters the interior of the adsorbent 305, the oxygen in the compressed air is adsorbed due to the interaction with the interior of the adsorbent 305, so that the adsorbent 305 enters the adsorption stage, while the nitrogen that is not easily adsorbed by the adsorbent 305 enters the air outlet at the upper end of the reaction tank 301, thereby achieving the separation of nitrogen. The separated nitrogen is extracted and stored through the buffer part 4;

[0069] When the adsorbent 305 is in a saturated state of adsorbing oxygen, the pipeline is closed to stop the input of high-pressure air into the reaction tank 301, and the external valve on the pipeline is opened to discharge the high-pressure gas inside the reaction tank 301, so that the pressure inside the reaction tank 301 is reduced (usually it is switched to a low-pressure state). When the pressure inside the reaction tank 301 is reduced, the adsorbent 305's ability to adsorb gas, especially the adsorption of oxygen, is weakened, causing oxygen to begin to desorb and be discharged from the inside of the reaction tank 301. At the same time, nitrogen is introduced into the inside of the reaction tank 301 through the pipeline, and the nitrogen molecules will replace the oxygen molecules of the adsorbent 305. The adsorbent 305 has a low affinity for nitrogen, and is replaced by the adsorbed oxygen, resulting in the oxygen being replaced and released again.

[0070] During the process of the adsorbent 305 adsorbing compressed air, high-pressure air is discharged between the sliding seat 307 and the fixed plate 306 through the one-way air extraction valve 309, so that the sliding seat 307 can extend out of the fixed plate 306. The extension of the fixed plate 306 can squeeze the adsorbent 305. The position of the sliding seat 307 is detected by the travel alarm 308, and the detection data is sent to the inside of the console 201, so that the whole of the adsorbent 305 is more compact, can better resist external mechanical stress, extend the service life, and can also improve the arrangement between particles, make the pores smoother, and improve the adsorption capacity of substances; it can also reduce the porosity of the material, increase the overall density, and enhance the stability and reliability of the molecular sieve;

[0071] While waiting for the adsorbent 305 inside this reaction tank 301 to recover, the compressed air is switched to the inside of the next reaction tank 301 that has not been adsorbed through a pipeline. By switching multiple reaction tanks 301, the adsorbent 305 inside different reaction tanks 301 has sufficient adsorption or desorption time, thereby achieving continuous production of nitrogen.

[0072] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A zero gas consumption PSA nitrogen generator, characterized in that: It comprises a fixing frame (1), the upper part of which is fixedly connected to a purification unit (2), and the purification unit (2) is capable of compressing and filtering input air to remove impurities in the air; The purification unit (2) is connected to an adsorption unit (3), and the adsorption unit (3) is capable of filtering the pumped air so that oxygen, carbon dioxide and moisture in the air are adsorbed to leave nitrogen; The adsorption part (3) is connected to a buffer part (4), and the buffer part (4) is capable of collecting nitrogen generated by the adsorption part (3); The adsorption part (3) comprises a reaction tank (301), a diffusion seat (302), a diffusion plate (303), a support plate (304), an adsorbent (305), a fixed plate (306), a sliding seat (307), a travel alarm (308) and a one-way air extraction valve (309). The reaction tank (301) is provided with at least two seats. The reaction tanks (301) are connected to each other via a pipeline with a valve. The lower end of the reaction tank (301) is fixedly connected to the fixed frame (1), and the lower end of the reaction tank (301) is connected to the inlet and outlet of the purification part (2) via a pipeline. The diffusion seat (302) is fixedly connected to the lower end of the reaction tank (301). The diffusion plate (303) is arranged at the lower end of the reaction tank (301). The support plate (304) is arranged on the diffusion plate (303). ), and the support plate (304) is fixedly connected to the interior of the lower end of the reaction tank (301), the support plate (304) is arranged inside the reaction tank (301), and the adsorbent (305) is arranged on the upper part of the support plate (304), the fixed plate (306) is fixedly arranged at the upper end of the reaction tank (301), the upper end of the sliding seat (307) is slidably arranged inside the fixed plate (306), and the lower end of the sliding seat (307) is in contact with the upper end of the adsorbent (305), the travel alarm (308) is fixedly arranged at the upper end of the fixed plate (306), and the travel alarm (308) cooperates with the upper end of the sliding seat (307), and the output end of the one-way air extraction valve (309) is arranged between the fixed plate (306) and the sliding seat (307).

2. A zero gas consumption PSA nitrogen generator according to claim 1, characterized in that: The diffuser plate (303) is provided with a plurality of spiral air guide grooves in its entirety.

3. The zero gas consumption PSA nitrogen generator according to claim 1, characterized in that: The support plate (304) is an industrial coconut plate, which is a filter material made of coconut shells or coconut fibers.

4. The zero gas consumption PSA nitrogen generator according to claim 1, characterized in that: The material used for the adsorbent (305) is carbon molecular sieve.

5. The zero gas consumption PSA nitrogen generator according to claim 1, characterized in that: The lower ends of the fixed plate (306) and the sliding seat (307) are both provided with through holes.

6. A zero gas consumption PSA nitrogen generator according to claim 1, characterized in that: The purification unit (2) comprises a control console (201), an air delivery pump (202), an air intake seat (203), a booster pump (204), a filter tank (205), a guide plate (206), and an air filter material (207); the control console (201) is fixedly connected to a fixing frame (1); the air delivery pump (202) is fixedly connected to the interior of the control console (201); the air intake seat (203) is fixedly connected to an input end of the air delivery pump (202); and the booster pump (204) is fixedly connected to an input end of the air delivery pump (202). The input end of the filter tank (205) is also fixedly connected to the air inlet seat (203), the output end of the booster pump (204) is fixedly connected to the input end of the one-way air intake valve (309), the lower end of the filter tank (205) is fixedly connected to the fixing frame (1), the lower end of the filter tank (205) is connected to the output end of the air delivery pump (202), the guide plate (206) is fixedly arranged inside the filter tank (205), and the air filter material (207) is filled inside the filter tank (205).

7. A zero gas consumption PSA nitrogen generator according to claim 6, characterized in that: The guide plate (206) is configured as a spiral shape as a whole.

8. A zero gas consumption PSA nitrogen generator according to claim 6, characterized in that: The air inlet seat (203) is divided into a double-layer design of an inner tube (2031) and an outer cover (2032), and the outer cover (2032) is provided with a plurality of through holes.

9. The zero gas consumption PSA nitrogen generator according to claim 1, characterized in that: The buffer portion (4) comprises an extraction seat (401), an extraction pump (402), a pressure relief valve (403), a connecting pipe (404) and a gas storage tank (405); the extraction seat (401) is fixedly arranged at the upper end of the reaction tank (301); the extraction pump (402) is fixedly arranged inside the extraction seat (401), and an input end of the extraction pump (402) is connected to the inside of the reaction tank (301); the pressure relief valve (403) is arranged inside the extraction seat (401), and the pressure relief valve (403) is connected to the inside of the reaction tank (301); one end of the connecting pipe (404) is fixedly connected to the output end of the extraction pump (402); the lower end of the gas storage tank (405) is fixedly connected to the fixing frame (1), and the inside of the gas storage tank (405) is connected to the other end of the connecting pipe (404).

10. A zero gas consumption PSA nitrogen generator according to claim 9, characterized in that: A plurality of partitions (4051) are arranged inside the gas storage tank (405), and the partitions (4051) are arranged in a wave shape.

Images