Nitrogen-making equipment system and technological process thereof

Abstract

The invention relates to a nitrogen making equipment system and a technological process thereof, and belongs to the field of nitrogen making technology.The nitrogen making equipment system comprises an air compressor, a purification mechanism, a buffer tank, a reaction tank, a gas storage tank and a cleaning mechanism, the purification mechanism is arranged on the air compressor in a communicating mode and used for filtering impurities in compressed gas produced by the air compressor, and the buffer tank is arranged on the purification mechanism in a communicating mode and used for filtering impurities in the compressed gas; at least two reaction tanks are arranged on the buffer tank in a communicating manner, the interior of each reaction tank is divided into an adsorption area and a recovery area, each adsorption area is filled with a carbon molecular sieve, each reaction tank is provided with a discharge port communicated with the corresponding adsorption area, and the gas storage tank is arranged on the adsorption areas of the two reaction tanks in a communicating manner; the cleaning mechanism is arranged on the reaction tank and is used for cleaning the carbon molecular sieve in the adsorption area. According to the present invention, the recovery effect of the carbon molecular sieve in the reaction tank is improved, such that the carbon molecular sieve can maintain the good adsorption effect during the adsorption each time, and the nitrogen generation efficiency and the nitrogen generation quality are improved.

Description

Technical Field

[0001] This application relates to the field of nitrogen production technology, and particularly to a nitrogen production equipment system and its process flow. Background Art

[0002] Nitrogen production refers to separating oxygen and nitrogen in the air through physical methods to obtain high-purity nitrogen. The nitrogen production system usually uses air as raw material and realizes the separation of nitrogen through different physical methods. Currently, the common nitrogen production technologies in the market mainly include cryogenic air separation method, membrane separation method, and pressure swing adsorption (PSA) method. Among them, the cryogenic air separation method has complex equipment and high energy consumption, and is not suitable for miniaturized devices; the nitrogen obtained by the membrane separation method has low purity and is difficult to meet the requirements of high-end applications; in contrast, the pressure swing adsorption method is widely used in medium and small nitrogen production systems due to its characteristics of simple equipment, convenient operation, and low operating cost.

[0003] Existing pressure swing adsorption nitrogen generators usually adopt a two-tank or multi-tank cyclic adsorption process. Two reaction tanks are connected through pipelines. The reaction tanks are filled with adsorption materials for adsorbing oxygen and other impurities in the air. The two reaction tanks are switched with each other during use. When one reaction tank is adsorbing, the other reaction tank is connected to the atmosphere to discharge the adsorbed gas to achieve regeneration or recovery, so as to achieve continuous nitrogen production.

[0004] Since the adsorption material screens the components in the air through the internal micropores, when the reaction tank is regenerated or recovered, dust and other impurities in the air are difficult to be effectively removed from the adsorption material, resulting in a low regeneration or recovery effect of the adsorption material in the reaction tank, affecting the adsorption effect of the next adsorption material, and further reducing the subsequent nitrogen production efficiency and nitrogen production quality. Summary of the Invention

[0005] In order to improve the nitrogen production efficiency and nitrogen production quality, this application provides a nitrogen production equipment system and its process flow.

[0006] The nitrogen production equipment system provided by this application adopts the following technical solutions: A nitrogen production equipment system includes an air compressor, a purification mechanism, a buffer tank, reaction tanks, a gas storage tank, and a cleaning mechanism. The purification mechanism is connected to the air compressor and is used to filter impurities in the compressed gas produced by the air compressor. The buffer tank is connected to the purification mechanism. At least two reaction tanks are connected to the buffer tank. An adsorption area and a recovery area are separated in the reaction tank. Carbon molecular sieve is filled in the adsorption area. A discharge port is connected to the adsorption area on the reaction tank. The gas storage tank is connected to the adsorption areas of two reaction tanks. The cleaning mechanism is arranged on the reaction tank and is used to clean the carbon molecular sieve in the adsorption area.

[0007] By adopting the above technical solution, the air compressor compresses air into compressed gas. The compressed gas is introduced into the purification mechanism, and the purification mechanism filters out the impurities in the compressed gas. After the filtered compressed gas enters the buffer tank to relieve the pressure fluctuation, the compressed gas in the buffer tank then enters the adsorption zone in one of the reaction tanks. The carbon molecular sieve in the adsorption zone adsorbs oxygen and other impurities in the compressed air, and the separated nitrogen gas is introduced into the gas storage tank for storage. During the adsorption process, the gas adsorbed by the carbon molecular sieve in the other reaction tank is discharged from the discharge port. At the same time, the cleaning mechanism cleans the impurities adsorbed on the carbon molecular sieve in the other reaction tank to the recovery zone, and then introduces the compressed gas in the buffer tank into the cleaned reaction tank. The reaction tank that previously performed the adsorption work performs exhaust and cleaning, so as to continuously produce nitrogen. By means of the purification mechanism, the impurity content of the compressed gas introduced into the reaction tank is reduced, thereby reducing the amount of impurities adhering to the carbon molecular sieve in the reaction tank. At the same time, in cooperation with the cleaning mechanism to clean the impurities on the carbon molecular sieve, the recovery effect of the carbon molecular sieve in the reaction tank is improved, so that the carbon molecular sieve can maintain a good adsorption effect each time it adsorbs, and the nitrogen production efficiency and nitrogen production quality are improved.

[0008] Optionally, the purification mechanism includes an oil separator, a precision filter, a dryer, a dust fine filter and an activated carbon filter. The oil separator is connected and arranged on the air compressor, the precision filter is connected and arranged on the oil separator, the dryer is connected and arranged on the precision filter, the dust fine filter is connected and arranged on the dryer, and the activated carbon filter is connected and arranged on the dust fine filter and is connected to the reaction tank.

[0009] By adopting the above technical solution, the oil separator filters out the oil content in the compressed air, the precision filter filters out the fine particles in the compressed air, the dryer removes the moisture in the compressed air, the dust fine filter further removes the dust in the compressed air, and the activated carbon filter further filters out the impurities in the compressed air, realizing multiple filtration of the compressed air and improving the purity of the compressed air stored in the buffer tank.

[0010] Optionally, the cleaning mechanism includes a net bag, a vibration motor, a blowing component and a sealing component. The net bag is arranged on the inner wall of the reaction tank to divide the interior of the reaction tank into an adsorption zone and a recovery zone. The vibration motor is arranged on the net bag. The blowing component is arranged on the reaction tank and is used for blowing air to the net bag. The sealing component is arranged on the reaction tank and is used for sealing the bottom of the net bag.

[0011] By adopting the above technical solution, the vibration motor is started. The vibration motor drives the wire mesh bag to vibrate, and the wire mesh bag drives the carbon molecular sieve to vibrate, so as to separate the impurities adhering to the carbon molecular sieve. The impurities fall into the recovery area through the pores on the wire mesh bag. At the same time, the blowing component blows air to the carbon molecular sieve to blow the impurities on the carbon molecular sieve to the recovery area, so as to clean the carbon molecular sieve and reduce the amount of impurities adhering to the carbon molecular sieve. After the cleaning is completed, the closing component closes the bottom of the wire mesh bag, and then compressed air can be introduced into the adsorption area for adsorption.

[0012] Optionally, the wire mesh bag includes an outer frame, an inner frame, buffer springs, a mesh body and positioning members. The outer frame is circumferentially arranged on the inner wall of the reaction tank. The inner frame is slidably arranged on the outer frame. The vibration motor is arranged on the inner frame. The buffer springs are circumferentially arranged at intervals on the inner frame. The buffer springs are connected to the outer frame. The mesh body is arranged on the inner frame to form a carrier with a hollow interior and an open upper end. The positioning members are arranged on the outer frame and are used to position the inner frame on the outer frame.

[0013] By adopting the above technical solution, the staff first releases the positioning of the inner frame on the outer frame by the positioning members, and then starts the vibration motor to drive the inner frame to vibrate. The inner frame drives the mesh body to vibrate, and then drives the carbon molecular sieve in the mesh body to vibrate. During the vibration process, the buffer springs expand and contract with the vibration of the inner frame to provide buffering for the inner frame, reduce the vibration transmitted from the inner frame to the outer frame, and further reduce the vibration of the reaction tank after the vibration motor is started, and reduce the probability of damage to the reaction tank caused by vibration.

[0014] Optionally, the positioning members include tapered plugs and push rods. A plurality of tapered plugs are slidably arranged on the outer frame. A plurality of positioning holes are formed on the inner frame for the tapered plugs to insert after the vibration motor stops vibrating. The push rods are arranged on the outer frame and are used to drive the tapered plugs to slide.

[0015] By adopting the above technical solution, after the vibration motor is turned off, the buffer springs circumferentially installed on the inner frame reset, so that the plurality of tapered plugs are respectively aligned with the plurality of positioning holes, and then the push rods are used to push the tapered plugs into the positioning holes, so as to conveniently position the inner frame on the outer frame.

[0016] Optionally, the closing component includes a support frame, a closing plate, a sealing strip and a driving motor. The support frame is circumferentially arranged on the inner wall of the reaction tank. The wire mesh bag abuts against the support frame. The closing plate is hingedly arranged on the support frame. The sealing strip is circumferentially arranged on the closing plate. The driving motor is arranged on the support frame and is coaxially connected to the hinge shaft of the closing plate.

[0017] By adopting the above technical solution, when cleaning the carbon molecular sieve, the staff starts the drive motor to rotate the closing plate away from the support frame, so that the net bag is connected to the recovery area, which facilitates the impurities in the carbon molecular sieve in the net bag to fall into the recovery area. After the cleaning is completed, the staff starts the drive motor to rotate the closing plate toward the support frame, and the closing plate drives the sealing strip to press against the support frame, thereby separating the adsorption area and the recovery area, and improving the sealing of the adsorption area.

[0018] Optionally, a positioning assembly for positioning the closing plate on the supporting frame is provided on the supporting frame, the positioning assembly includes a positioning block and a positioning cylinder, the positioning block is slidingly provided on the supporting frame, the positioning block is provided with an opening on one side facing the closing plate, the opening of the positioning block gradually decreases from close to the closing plate to away from the closing plate, and the positioning cylinder is provided on the supporting frame and connected to the positioning block.

[0019] By adopting the above technical solution, after the closing plate drives the sealing strip to press against the support frame, the positioning cylinder is started, and the piston rod of the positioning cylinder drives the positioning block to move toward the closing plate. The side wall of the opening side of the positioning block squeezes the closing plate, so that the closing plate continues to move toward the support frame, thereby improving the stability of the sealing strip driven by the closing plate to press against the support frame, and improving the isolation effect of the adsorption area and the sealing area.

[0020] Optionally, the blowing assembly includes an exhaust fan, an air duct and a high-pressure nozzle, the exhaust fan is connected and arranged on the buffer tank, the air duct is connected and arranged on the exhaust fan, and the high-pressure nozzle is arranged on the reaction tank and connected to the exhaust fan.

[0021] By adopting the above technical solution, the staff starts the exhaust fan, which draws the filtered high-pressure gas in the buffer tank into the high-pressure nozzle through the air duct. The high-pressure gas is then sprayed from the high-pressure nozzle to the carbon molecular sieve, blowing away the impurities adhering to the carbon molecular sieve.

[0022] Optionally, an inspection port is provided on the top of the reaction tank, a cover is provided on the flange of the inspection port, the outer frame is slidably provided on the inner wall of the reaction tank along the height direction of the reaction tank, and a control component for driving the outer frame to slide is provided on the reaction tank.

[0023] By adopting the above technical solution, when the carbon molecular sieve in the mesh body needs to be replaced, the staff opens the inspection port, and then drives the outer frame to slide toward the direction close to the inspection port through the control component. The outer frame drives the mesh body and the carbon molecular sieve out of the inspection port, and the staff can take out and replace the carbon molecular sieve in the mesh body, thereby improving the convenience of replacing the carbon molecular sieve in the reaction tank.

[0024] The present application provides a nitrogen production process using the following technical solutions: A nitrogen production process flow includes the following steps: S1: An air compressor makes air into compressed gas, and a purification mechanism filters the compressed gas; S2: The filtered compressed gas enters one of the reaction tanks, and the other reaction tank discharges the adsorbed gas. At the same time, a cleaning mechanism cleans the impurities on the carbon molecular sieve in the adsorption area of the reaction tank to the recovery area; S3: The nitrogen separated in the reaction tank enters the gas storage tank for storage; S4: The nitrogen is pressurized by a booster connected to the gas storage tank, and then the high-pressure nitrogen is made into liquid nitrogen by a liquid nitrogen machine; S5: The filtered compressed gas is introduced into the other cleaned reaction tank, the gas adsorbed by the previous working reaction tank is discharged, and the previous working reaction tank is cleaned. In this way, it reciprocates and continuously produces nitrogen efficiently.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. By the purification mechanism, the impurity content of the compressed gas introduced into the reaction tank is reduced, thereby reducing the amount of impurities adhering to the carbon molecular sieve in the reaction tank. At the same time, in cooperation with the cleaning mechanism for cleaning the impurities on the carbon molecular sieve, the recovery effect of the carbon molecular sieve in the reaction tank is improved, so that the carbon molecular sieve can maintain a good adsorption effect each time it adsorbs, and the nitrogen production efficiency and nitrogen production quality are improved; 2. The mesh bag drives the carbon molecular sieve to vibrate, so as to clear the impurities adhering to the carbon molecular sieve. The impurities fall into the recovery area through the pores on the mesh bag. At the same time, the blowing component blows air to the carbon molecular sieve to blow the impurities on the carbon molecular sieve to the recovery area, thereby cleaning the carbon molecular sieve and reducing the amount of impurities adhering to the carbon molecular sieve; 3. Through the control component, the outer frame is driven to slide in the direction close to the maintenance port, and the outer frame drives the mesh body and the carbon molecular sieve to pass through the maintenance port, and the staff can take, place and replace the carbon molecular sieve in the mesh body, improving the convenience of replacing the carbon molecular sieve in the reaction tank. Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of the nitrogen production equipment system and its process flow according to an embodiment of the present application.

[0027] Figure 2 It is a schematic structural diagram of the reaction tank according to an embodiment of the present application.

[0028] Figure 3 It is a schematic cross-sectional structural diagram of the reaction tank according to an embodiment of the present application.

[0029] Figure 4 It is Figure 3 A partial enlarged schematic diagram of part A in

[0030] Reference numerals: 1, air compressor; 2, purification mechanism; 21, oil separator; 22, precision filter; 23, dryer; 24, fine dust filter; 25, activated carbon filter; 3, buffer tank; 4, reaction tank; 5, gas storage tank; 6, cleaning mechanism; 61, mesh bag; 611, outer frame; 612, inner frame; 613, buffer spring; 614, mesh body; 615, positioning member; 6151, conical plug; 6152, push rod; 62, vibration motor; 63, blowing component; 631, exhaust fan; 632, air duct; 633, high-pressure nozzle; 64, closing component; 641, support frame; 642, closing plate; 643, sealing strip; 644, drive motor; 7, adsorption area; 8, recovery area; 9, positioning component; 91, positioning block; 92, positioning cylinder; 10, cover; 11, control component; 12, booster; 13, liquid nitrogen machine. Specific embodiments

[0031] The following will further describe the present application in detail with reference to the Figures 1-4 accompanying drawings.

[0032] The embodiment of the present application discloses a nitrogen production equipment system and its process flow.

[0033] Referring to Figure 1 , a nitrogen production equipment system includes an air compressor 1, a purification mechanism 2, a buffer tank 3, a reaction tank 4, a gas storage tank 5 and a cleaning mechanism 6. The purification mechanism 2 is connected and installed on the air compressor 1. The purification mechanism 2 is used to filter impurities in the compressed gas produced by the air compressor 1. The purification mechanism 2 includes an oil separator 21 connected and installed at the air outlet end of the air compressor 1 through a pipeline, a precision filter 22 connected and installed at the air outlet end of the oil separator 21 through a pipeline, a dryer 23 connected and installed at the air outlet end of the precision filter 22 through a pipeline, a fine dust filter 24 connected and installed at the air outlet end of the dryer 23 through a pipeline, and an activated carbon filter 25 connected and installed at the air outlet end of the fine dust filter 24 through a pipeline. The buffer tank 3 is connected and installed at the air outlet end of the activated carbon filter 25 through a pipeline. In this embodiment, sewage outlets connected to the sewage pipeline are installed at the bottoms of the oil separator 21, the precision filter 22, the dryer 23, the fine dust filter 24, the activated carbon filter 25 and the buffer tank 3, and control valves are installed on the sewage outlets, which is convenient for staff to clean the impurities in the oil separator 21, the precision filter 22, the dryer 23, the fine dust filter 24, the activated carbon filter 25 and the buffer tank 3.

[0034] The air compressor 1 compresses air to form compressed gas. The compressed gas sequentially passes through an oil separator 21 to filter out the oil in the compressed air, a precision filter 22 to filter out the fine particles in the compressed air, a dryer 23 to remove the moisture in the compressed air, a dust fine filter 24 to further remove the dust in the compressed air, and an activated carbon filter 25 to filter out the impurities in the compressed air, and then enters the buffer tank 3 for storage and pressure stabilization to relieve the pressure fluctuation of the compressed gas. Through multiple filtration of the compressed gas, various impurities in the compressed gas are removed, effectively improving the purity of the compressed gas entering the buffer tank 3.

[0035] Refer to Figure 1 、 Figure 2 , at least two reaction tanks 4 are installed on the buffer tank 3 through pipelines. The reaction tanks 4 are filled with carbon molecular sieves for adsorbing oxygen and other impurities in the compressed gas. In this embodiment, solenoid valves are installed on the connecting pipelines between each reaction tank 4 and the buffer tank 3 to facilitate the staff to control the connection between the reaction tank 4 and the buffer tank 3; a maintenance port is opened at the top of the reaction tank 4, and a cover 10 is flange-mounted on the maintenance port. A discharge port is installed on the cover 10 and connected to the inside of the reaction tank 4, and a solenoid valve is installed on the discharge port to facilitate the staff to control the opening and closing of the discharge port.

[0036] Refer to Figure 1 、 Figure 3 , a cleaning mechanism 6 is installed on the reaction tank 4. The cleaning mechanism 6 is used to clean the carbon molecular sieves in the reaction tank 4. The cleaning mechanism 6 includes a mesh bag 61, a vibration motor 62, a blowing component 63 and a sealing component 64. The mesh bag 61 is installed on the inner wall of the reaction tank 4 and is used to store the carbon molecular sieves. The mesh bag 61 divides the interior of the reaction tank 4 into an adsorption area 7 and a recovery area 8, and the discharge port is connected to the adsorption area 7. In this embodiment, a sewage discharge port connected to the adsorption area 7 is installed on the reaction tank 4, and a solenoid valve is installed on the sewage discharge port, and the sewage discharge port is connected to the sewage pipeline.

[0037] Refer to Figure 3 、 Figure 4, the wire mesh bag 61 comprises an outer frame 611, an inner frame 612, buffer springs 613, a wire mesh body 614 and positioning members 615. The outer frame 611 is slidably mounted on the inner wall of the reaction tank 4 along the height direction of the reaction tank 4. The interior of the outer frame 611 is hollow and both the upper and lower ends are open. A control component 11 is mounted on the reaction tank 4, and the control component 11 is used to drive the outer frame 611 to slide. In this embodiment, the control component 11 includes a control motor and a control screw rod. The control motor is mounted on the inner wall of the reaction tank 4, the control screw rod is mounted on the output shaft of the control motor, and the control screw rod is threadedly connected to the outer frame 611. When the staff starts the control motor and reverses the rotation of the output shaft of the control motor, the control screw rod rotates forward and backward, so as to drive the outer frame 611 to move in the direction towards or away from the cover 10.

[0038] Refer to Figure 3 , Figure 4 , sliding grooves are formed on the circumferential inner walls of the outer frame 611, the inner frame 612 is slidably mounted in the sliding grooves. The interior of the inner frame 612 is hollow and both the upper and lower ends are open. A plurality of buffer springs 613 are circumferentially and spacedly mounted on the inner frame 612, and the plurality of buffer springs 613 are respectively circumferentially mounted on the inner walls of the sliding grooves. The wire mesh body 614 is mounted on the inner frame 612. The wire mesh body 614 forms a carrier with a hollow interior and an open upper end. The carbon molecular sieve is mounted in the wire mesh body 614. The aperture of the wire mesh body 614 is smaller than the diameter of the carbon molecular sieve. The vibration motor 62 is mounted at the bottom of the inner frame 612.

[0039] When it is necessary to clean the carbon molecular sieve in the wire mesh body 614, the staff starts the vibration motor 62. The vibration motor 62 drives the inner frame 612 to vibrate. The inner frame 612 drives the wire mesh body 614 to vibrate, and further drives the carbon molecular sieve in the wire mesh body 614 to vibrate. The impurities adhering to the carbon molecular sieve can fall into the recovery area 8 through the pores at the bottom of the wire mesh body 614 under the action of vibration, so as to clean the carbon molecular sieve, reduce the amount of impurities adhering to the carbon molecular sieve, and during the vibration process, the buffer springs 613 expand and contract along with the vibration of the inner frame 612, providing buffering for the inner frame 612, reducing the vibration transmitted from the inner frame 612 to the outer frame 611, and further reducing the vibration of the reaction tank 4 after the vibration motor 62 is started, and reducing the probability of damage to the reaction tank 4 due to vibration.

[0040] When it is necessary to replace the carbon molecular sieve in the wire mesh body 614, the staff opens the inspection port, and drives the outer frame 611 to slide in the direction towards the cover 10 through the control component 11. The outer frame 611 drives the inner frame 612 and the wire mesh body 614 to move, so that the wire mesh body 614 can pass through the inspection port, and the staff can conveniently and quickly take the carbon molecular sieve in the wire mesh body 614, effectively improving the convenience for the staff to replace the carbon molecular sieve in the reaction tank 4.

[0041] Refer to Figure 3 ,Figure 4 The positioning member 615 is installed on the outer frame 611. The positioning member 615 is used to position the inner frame 612 on the outer frame 611. The positioning member 615 includes a tapered plug 6151 and a push rod 6152. A plurality of tapered plugs 6151 are slidably installed on the outer frame 611. The diameter of the tapered plug 6151 gradually decreases from the outer frame 611 towards the inner frame 612. A plurality of positioning holes are formed on the inner frame 612. The positioning holes are used for the tapered plug 6151 to insert after the vibration motor 62 stops vibrating. The push rod 6152 is installed on the outer frame 611. The push rod 6152 is used to drive the tapered plug 6151 to slide towards or away from the positioning hole. In this embodiment, the push rod 6152 is a cylinder. The cylinder is installed on the outer frame 611. The piston rod of the cylinder is connected to the tapered plug 6151.

[0042] When cleaning the carbon molecular sieve, the staff starts the push rod 6152, so that the tapered plug 6151 is removed from the positioning hole, and the positioning of the inner frame 612 on the outer frame 611 is released. The inner frame 612 can slide on the outer frame 611. After cleaning, the plurality of buffer springs 613 are reset, and then drive the inner frame 612 to reset. At this time, the tapered plug 6151 is aligned with the positioning hole. The staff then starts the push rod 6152, so that the tapered plug 6151 is inserted into the positioning hole, and the inner frame 612 can be conveniently positioned on the outer frame 611, improving the stability of the inner frame 612 during the subsequent nitrogen production process.

[0043] Refer to Figure 1 、 Figure 3 The blowing component 63 is installed on the reaction tank 4. The blowing component 63 is used to blow air to the mesh bag 61. The blowing component 63 includes a blower 631, a duct conduit 632 and a high-pressure nozzle 633. The air inlet of the blower 631 is connected and installed on the buffer tank 3. The duct conduit 632 is connected and installed on the air outlet of the blower 631. In this embodiment, the duct conduit 632 is a corrugated hose. A plurality of high-pressure nozzles 633 are circumferentially spaced and installed on the side wall of the reaction tank 4 near the top. The plurality of high-pressure nozzles 633 are all connected to the duct conduit 632.

[0044] The staff starts the blower 631. The blower 631 extracts the filtered high-pressure gas in the buffer tank 3. The high-pressure gas enters the high-pressure nozzle 633 through the duct conduit 632 and is ejected. The high-pressure gas is ejected onto the carbon molecular sieve, and the impurities adhered to the carbon molecular sieve can be blown off, improving the cleaning effect of the carbon molecular sieve.

[0045] Refer to Figure 3The closing component 64 is installed on the reaction tank 4. The closing component 64 is used to close the bottom opening of the inner frame 612. The closing component 64 includes a support frame 641, a closing plate 642, a sealing strip 643 and a drive motor 644. The support frame 641 is hollow inside and has openings at both ends. The support frame 641 is circumferentially installed on the inner wall of the reaction tank 4. The bottom of the outer frame 611 abuts against the support frame 641. The closing plate 642 is hingedly installed on the bottom wall of the support frame 641. The closing plate 642 is used to close the opening of the support frame 641. The sealing strip 643 is circumferentially installed on the side of the closing plate 642 facing the support frame 641. The drive motor 644 is installed on the support frame 641. The output shaft of the drive motor 644 is coaxially connected to the hinge shaft of the closing plate 642.

[0046] When cleaning the carbon molecular sieve, the staff controls the drive motor 644 to start, driving the closing plate 642 to rotate in the direction away from the support frame 641, so that the opening of the support frame 641 is opened, so as to facilitate the passage of impurities adhering to the carbon molecular sieve. After the cleaning is completed, the staff controls the drive motor 644 to drive the closing plate 642 to rotate in the direction close to the support frame 641, so that the sealing strip 643 on the closing plate 642 is pressed against the support frame 641, and the closing plate 642 can close the opening of the support frame 641, thereby separating the adsorption area 7 and the recovery area 8, and improving the sealing of the adsorption area 7.

[0047] Reference Figure 3 A positioning assembly 9 is installed on the support frame 641. The positioning assembly 9 is used to position the closing plate 642 on the support frame 641. The positioning assembly 9 includes a positioning block 91 and a positioning cylinder 92. The positioning block 91 is slidably installed on the bottom wall of the support frame 641. The positioning block 91 is open on one side of the closing plate 642. The opening diameter of the positioning block 91 gradually decreases from close to the closing plate 642 to away from the closing plate 642. The positioning cylinder 92 is installed on the support frame 641 along the sliding direction of the positioning block 91. The piston rod of the positioning cylinder 92 is connected to the positioning block 91.

[0048] After the closing plate 642 rotates to close the opening of the support frame 641, the piston rod of the positioning cylinder 92 extends, causing the positioning block 91 to move toward the direction close to the closing plate 642. During the movement of the positioning block 91, the side wall of the opening side squeezes the closing plate 642, causing the closing plate 642 to continue to move toward the direction close to the support frame 641. The closing plate 642 presses the sealing strip 643 onto the support frame 641, effectively improving the isolation effect of the closing plate 642 between the adsorption area 7 and the sealing area.

[0049] Reference Figure 1 , a nitrogen production process, comprising the following steps: S1: The air compressor 1 converts air into compressed gas, and the purification mechanism 2 filters the compressed gas; S2: The filtered compressed gas enters one of the reaction tanks 4, and the other reaction tank 4 discharges the adsorbed gas. Meanwhile, the cleaning mechanism 6 cleans the impurities on the carbon molecular sieve in the adsorption area 7 of the reaction tank 4 to the recovery area 8; S3: The nitrogen gas separated in the reaction tank 4 enters the gas storage tank 5 for storage; S4: The nitrogen gas is pressurized by the booster 12 connected to the gas storage tank 5, and then the high-pressure nitrogen gas is made into liquid nitrogen by the liquid nitrogen machine 13; S5: The filtered compressed gas is introduced into the other cleaned reaction tank 4, the gas adsorbed by the reaction tank 4 in the previous operation is discharged, and the reaction tank 4 in the previous operation is cleaned. In this way, the cycle continues to continuously produce nitrogen efficiently.

[0050] The implementation principle of the nitrogen production equipment system and its technological process in the embodiment of this application is as follows: The air compressor 1 compresses air into compressed gas. The compressed gas is successively passed through the oil separator 21, precision filter 22, dryer 23, dust fine filter 24 and activated carbon filter 25 for filtration. The filtered compressed gas enters the buffer tank 3 to relieve pressure fluctuations. Then, one of the reaction tanks 4 is connected to the buffer tank 3, and the connection between the other reaction tank 4 and the reaction tank 4 is disconnected. The compressed gas is introduced into one of the reaction tanks 4. The carbon molecular sieve in the mesh body 614 adsorbs oxygen and impurities in the compressed air, thereby separating nitrogen from the compressed gas. The separated nitrogen gas is introduced into the gas storage tank 5, and then is pressurized by the booster 12 and made into liquid nitrogen by the liquid nitrogen machine 13 for output. During the nitrogen production process, the discharge port of the other reaction tank 4 is opened, so that the gas adsorbed by the carbon molecular sieve is discharged. Then, the closing plate 642 is opened, so that the adsorption area 7 and the recovery area 8 are connected. The exhaust fan 631 and the vibration motor 62 are started to clean the impurities adhered to the carbon molecular sieve into the recovery area 8. Then, the closing plate 642 is closed. Then, the reaction tank 4 after cleaning the carbon molecular sieve is connected to the buffer tank 3, and the connection between the reaction tank 4 that produced nitrogen previously and the buffer tank 3 is disconnected. The reaction tank 4 that produced nitrogen previously is exhausted and cleaned. In this cycle, the preparation of liquid nitrogen continues. By means of the purification mechanism 2, the impurity content of the compressed gas introduced into the reaction tank 4 is reduced, thereby reducing the amount of impurities adhering to the carbon molecular sieve in the reaction tank 4. At the same time, in cooperation with the cleaning mechanism 6 to clean the impurities on the carbon molecular sieve, the recovery effect of the carbon molecular sieve in the reaction tank 4 is improved, so that the carbon molecular sieve can maintain a good adsorption effect every time it adsorbs, and the nitrogen production efficiency and nitrogen production quality are improved.

[0051] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.

Claims

1. A nitrogen production equipment system, characterized in that: The invention comprises an air compressor (1), a purification mechanism (2), a buffer tank (3), a reaction tank (4), an air storage tank (5) and a cleaning mechanism (6), wherein the purification mechanism (2) is connected to the air compressor (1) and is used to filter impurities in the compressed gas produced by the air compressor (1), the buffer tank (3) is connected to the purification mechanism (2), at least two reaction tanks (4) are connected to the buffer tank (3), an adsorption zone (7) and a recovery zone (8) are formed in the reaction tank (4), the adsorption zone (7) is filled with a carbon molecular sieve, the reaction tank (4) is provided with a discharge port connected to the adsorption zone (7), the air storage tank (5) is connected to the adsorption zone (7) of the two reaction tanks (4), and the cleaning mechanism (6) is provided on the reaction tank (4) and is used to clean the carbon molecular sieve in the adsorption zone (7).

2. A nitrogen production equipment system according to claim 1, characterized in that: The purification mechanism (2) includes an oil remover (21), a precision filter (22), a dryer (23), a dust fine filter (24) and an activated carbon filter (25), wherein the oil remover (21) is connected to the air compressor (1), the precision filter (22) is connected to the oil remover (21), the dryer (23) is connected to the precision filter (22), the dust fine filter (24) is connected to the dryer (23), and the activated carbon filter (25) is connected to the dust fine filter (24) and is in communication with the reaction tank (4).

3. A nitrogen production equipment system according to claim 1, characterized in that: The cleaning mechanism (6) comprises a net bag (61), a vibration motor (62), a blowing assembly (63) and a closing assembly (64); the net bag (61) is arranged on the inner wall of the reaction tank (4) to separate the interior of the reaction tank (4) into an adsorption area (7) and a recovery area (8); the vibration motor (62) is arranged on the net bag (61); the blowing assembly (63) is arranged on the reaction tank (4) and is used to blow air toward the net bag (61); and the closing assembly (64) is arranged on the reaction tank (4) and is used to close the bottom of the net bag (61).

4. A nitrogen production equipment system according to claim 3, characterized in that: The net bag (61) comprises an outer frame (611), an inner frame (612), a buffer spring (613), a net body (614) and a positioning member (615); the outer frame (611) is circumferentially arranged on the inner wall of the reaction tank (4); the inner frame (612) is slidably arranged on the outer frame (611); the vibration motor (62) is arranged on the inner frame (612); the buffer spring (613) is circumferentially arranged on the inner frame (612); the buffer spring (613) is connected to the outer frame (611); the net body (614) is arranged on the inner frame (612) to form a carrier with a hollow interior and an open upper end; the positioning member (615) is arranged on the outer frame (611) and is used to position the inner frame (612) on the outer frame (611).

5. A nitrogen production equipment system according to claim 4, characterized in that: The positioning member (615) comprises a conical plug (6151) and a push rod (6152); a plurality of the conical plugs (6151) are slidably provided on the outer frame (611); a plurality of positioning holes for inserting the conical plugs (6151) after the vibration motor (62) stops vibrating are provided on the inner frame (612); and the push rod (6152) is provided on the outer frame (611) and is used to drive the conical plug (6151) to slide.

6. A nitrogen production equipment system according to claim 3, characterized in that: The closing assembly (64) includes a support frame (641), a closing plate (642), a sealing strip (643) and a driving motor (644); the support frame (641) is circumferentially arranged on the inner wall of the reaction tank (4); the net bag (61) abuts against the support frame (641); the closing plate (642) is hingedly arranged on the support frame (641); the sealing strip (643) is circumferentially arranged on the closing plate (642); and the driving motor (644) is arranged on the support frame (641) and is coaxially connected to the hinge axis of the closing plate (642).

7. A nitrogen production equipment system according to claim 6, characterized in that: The support frame (641) is provided with a positioning assembly (9) for positioning the closing plate (642) on the support frame (641). The positioning assembly (9) includes a positioning block (91) and a positioning cylinder (92). The positioning block (91) is slidably provided on the support frame (641). The positioning block (91) is provided with an opening on one side facing the closing plate (642). The opening of the positioning block (91) gradually decreases from the direction close to the closing plate (642) to the direction away from the closing plate (642). The positioning cylinder (92) is provided on the support frame (641) and connected to the positioning block (91).

8. A nitrogen production equipment system according to claim 3, characterized in that: The blowing assembly (63) comprises an exhaust fan (631), an air guide pipe (632), and a high-pressure nozzle (633); the exhaust fan (631) is connected to the buffer tank (3); the air guide pipe (632) is connected to the exhaust fan (631); and the high-pressure nozzle (633) is arranged on the reaction tank (4) and is connected to the exhaust fan (631).

9. A nitrogen production equipment system according to claim 4, characterized in that: An inspection port is provided on the top of the reaction tank (4), and a cover (10) is provided on the flange of the inspection port. The outer frame (611) is slidably arranged on the inner wall of the reaction tank (4) along the height direction of the reaction tank (4). A control component (11) for driving the outer frame (611) to slide is provided on the reaction tank (4).

10. A nitrogen production process according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: The air compressor (1) converts air into compressed gas, and the purification mechanism (2) filters the compressed gas; S2: The filtered compressed gas enters one of the reaction tanks (4), and the other reaction tank (4) discharges the adsorbed gas. At the same time, the cleaning mechanism (6) cleans the impurities on the carbon molecular sieve in the adsorption zone (7) of the reaction tank (4) to the recovery zone (8); S3: The nitrogen separated in the reaction tank (4) enters the gas storage tank (5) for storage; S4: pressurizing the nitrogen gas through a booster (12) connected to the gas storage tank (5), and then converting the high-pressure nitrogen gas into liquid nitrogen through a liquid nitrogen machine (13); S5: The filtered compressed gas is passed into another cleaned reaction tank (4), the gas adsorbed by the previous working reaction tank (4) is discharged, and the previous working reaction tank (4) is cleaned, and this process is repeated to continuously produce nitrogen with high efficiency.

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