Energy-saving high-purity nitrogen manufacturing equipment

Abstract

The invention discloses energy-saving high-purity nitrogen manufacturing equipment which comprises a base, a recovery mechanism, a preparation mechanism and a heating mechanism, the recovery mechanism comprises an oil injection screw type air compressor, the oil injection screw type air compressor is arranged on one side of the upper end of the base, an oil tank is arranged on one side of the upper end of the oil injection screw type air compressor, and a heat exchanger is fixedly installed on one side of the oil tank; the preparation mechanism comprises a fixing frame; a heat circulation system is formed by a heating cavity and a heat exchange cavity of a second heating ring and a circulation cavity of a first heating ring through a connecting pipe, heat is transmitted into an adsorption tower through a hollow distributor, air is preheated, a molecular sieve is activated, meanwhile, waste heat of an oil injection screw type air compressor is utilized, external energy consumption is reduced, efficient utilization of heat energy is achieved, and energy is saved. The first communicating pipe and the second communicating pipe are matched with the first parallel pipe and the second parallel pipe to realize centralized distribution and circulation of heat of the multiple groups of heating rings, so that uniform heating of each adsorption tower is ensured, and the heating stability and the energy utilization rate are improved.

Description

Technical Field

[0001] This invention relates to the field of nitrogen production technology, and in particular to an energy-saving high-purity nitrogen production equipment. Background Technology

[0002] In industrial production, the preparation of high-purity nitrogen relies on the synergistic work of adsorption towers and molecular sieves. Currently, industrial pressure swing adsorption (PSA) technology uses molecular sieves to selectively adsorb impurities such as oxygen and carbon dioxide to achieve nitrogen separation and purification.

[0003] PSA nitrogen generators require compressed air as raw material to produce nitrogen. The air compressor generates a significant amount of heat during this process. As the adsorption tower continues to operate, this heat accumulates around the air compressor. As the temperature rises, the nitrogen generator inevitably generates heat during operation due to the separation of compressed air and gas. In Pressure Swing Adsorption (PSA) technology, the core heat sources are the heat of compression generated by the air compressor and the heat of adsorption released when the molecular sieve adsorbs oxygen. Without effective heat exchange, the continuously rising equipment temperature can lead to decreased molecular sieve performance, accelerated membrane material aging, and even affect nitrogen purity and system stability. Therefore, this study aims to research and improve the existing structure and address its shortcomings, providing an energy-saving, high-purity nitrogen manufacturing device with greater practical value. Summary of the Invention

[0004] The purpose of this invention is to provide an energy-saving high-purity nitrogen manufacturing equipment that can solve the problems mentioned in the background art, such as the continuous rise in equipment temperature leading to a decrease in molecular sieve performance, accelerated aging of membrane materials, and impact on nitrogen purity and system stability.

[0005] To achieve the above objectives, an energy-saving high-purity nitrogen production device is provided, comprising: a base, a recovery mechanism, a preparation mechanism, and a heating mechanism. The recovery mechanism includes an oil-injected screw air compressor, which is disposed on one side of the upper end of the base. An oil tank is provided on one side of the upper end of the oil-injected screw air compressor, and a heat exchanger is fixedly installed on one side of the oil tank. The preparation mechanism includes a fixed frame, which is disposed on the other side of the upper end of the base. A first adsorption tower and a second adsorption tower are respectively installed on both sides of the upper end face of the fixed frame. A plurality of distributors are sequentially installed from bottom to top inside both the first and second adsorption towers. Each end is equipped with a molecular sieve; the heating mechanism includes several first heating rings and several second heating rings, which are respectively sleeved on the outside of the second adsorption tower and the first adsorption tower, and correspond one-to-one with several distributors; the inner sides of the second heating ring are respectively provided with a heating chamber and a heat exchange chamber, and the inner side of the first heating ring is provided with a circulation chamber. Each heating chamber and heat exchange chamber is equipped with a connecting pipe on one side, and the other end of each pair of connecting pipes is connected to the input end and the output end of the circulation chamber, respectively. The inside of each distributor is hollow, and both ends of the distributor are connected to their corresponding heating chamber and circulation chamber through pipes, respectively.

[0006] The working principle of this invention is as follows: The oil-injected screw air compressor of the recovery mechanism compresses air, and the oil tank and heat exchanger work together for circulation lubrication and cooling; the first and second adsorption towers of the preparation mechanism adsorb and separate air to produce nitrogen through a distributor and molecular sieve; the heating mechanism uses the first and second heating rings in conjunction with the heat exchanger to recover the waste heat in the oil tank of the oil-injected screw air compressor, and heats the distributor in the adsorption tower. The high temperature promotes the rapid detachment of adsorbate in the molecular sieve, reducing energy consumption while improving the purity of nitrogen production. All mechanisms work together, and after pretreatment by the air wet tank, refrigerated dryer, and desiccant dryer, and noise reduction by the silencer, energy-saving and efficient operation of high-purity nitrogen production is achieved; the heating chamber and heat exchange chamber of the second heating ring and the circulation chamber of the first heating ring are connected by a connecting pipe to form a thermal circulation system. Heat is transferred to the inside of the adsorption tower through the hollow distributor, preheating the air and activating the molecular sieve. At the same time, the waste heat of the oil-injected screw air compressor is utilized to reduce external energy consumption and achieve efficient utilization of thermal energy.

[0007] According to the energy-saving high-purity nitrogen manufacturing equipment, the aperture of a plurality of distributors located inside the first adsorption tower and the second adsorption tower gradually decreases from bottom to top, and the molecular sieve micropores at the upper ends of the plurality of distributors located inside the first adsorption tower and the second adsorption tower gradually decrease from bottom to top.

[0008] The distributor aperture and molecular sieve micropores decrease from bottom to top, making the air distribution more uniform in the first and second adsorption towers, gradually filtering impurities, accurately adsorbing components such as oxygen, improving nitrogen separation efficiency and purity, and extending the service life of the molecular sieve.

[0009] According to the aforementioned energy-saving high-purity nitrogen manufacturing equipment, a first connecting pipe and a second connecting pipe are respectively inserted into one end of the second heating ring. One end of the first connecting pipe communicates with the heating chamber, and the second connecting pipe communicates with the heat exchange chamber. A first connecting pipe is installed between one end of several of the first connecting pipes. The first connecting pipe and the second connecting pipe, together with the first parallel pipe and the second parallel pipe, realize the centralized distribution and circulation of heat from multiple heating rings, ensuring uniform heating of each adsorption tower, and improving heating stability and energy utilization.

[0010] According to the aforementioned energy-saving high-purity nitrogen manufacturing equipment, a first circulating pump is installed at the shell-side outlet of the heat exchanger, a heat pipe is installed at the output end of the first circulating pump, a cold pipe is installed at the shell-side inlet of the heat exchanger, one end of the heat pipe is connected to one side of a first parallel pipe, and one end of the cold pipe is connected to one side of a second parallel pipe.

[0011] The first circulating pump transports the high-temperature oil from the shell side of the heat exchanger to the first parallel pipe via the heat pipe, providing energy for the heating mechanism; the cold pipe returns the cooled oil to the heat exchanger, forming a closed loop for waste heat recovery.

[0012] According to the energy-saving high-purity nitrogen manufacturing equipment, a second circulation pump is installed on the upper side of one side of the oil tank, and a first circulation pipe is sleeved on the output end of the second circulation pump. One end of the first circulation pipe is connected to the tube-side inlet of the heat exchanger. A second circulation pipe is installed on the bottom side of the oil tank, and one end of the second circulation pipe is connected to the tube-side outlet of the heat exchanger.

[0013] The second circulation pump, through the first and second circulation pipes, forms a lubricating oil circulation system between the oil tank and the heat exchanger, cooling the high-temperature lubricating oil, ensuring the stable operation of the oil-injected screw air compressor, and extending the service life of the equipment.

[0014] According to the energy-saving high-purity nitrogen manufacturing equipment, the top of the first adsorption tower and the second adsorption tower are both equipped with an outlet pipe, one end of the outlet pipe is fitted with a first transfer pipe, the bottom end of the opposing surfaces of a pair of first transfer pipes is fitted with a first equalizing valve, an exhaust pipe is fitted between the pair of first equalizing valves, and a second equalizing valve is installed between the upper ends of the opposing surfaces of a pair of first transfer pipes.

[0015] The first and second pressure equalization valves regulate the gas pressure between the first and second adsorption towers, balancing the pressure difference between the adsorption and desorption processes and reducing gas loss; the exhaust pipe is used to discharge the filtered nitrogen.

[0016] According to the energy-saving high-purity nitrogen manufacturing equipment, an air inlet pipe is installed at the bottom of both the first adsorption tower and the second adsorption tower. A second transfer pipe is fitted at one end of each air inlet pipe. A first solenoid valve is fitted at the top of each pair of opposing surfaces of the second transfer pipes. An air pipe is fitted between the pair of first solenoid valves. A second solenoid valve is fitted at the bottom of each pair of opposing surfaces of the second transfer pipes. A silencer pipe is fitted between the pair of second solenoid valves. A third pressure equalization valve is installed between the opposing surfaces of the pair of second transfer pipes.

[0017] The first and second solenoid valves control air intake and exhaust, and regulate the alternating use of the first and second adsorption towers. The third pressure equalization valve balances the pressure at the bottom of the adsorption tower. The air pipe delivers pretreated air, and the silencer pipe works with the silencer to reduce exhaust noise, ensuring stable and low-noise operation of the equipment.

[0018] According to the aforementioned energy-saving high-purity nitrogen manufacturing equipment, an air wet tank, a refrigerated dryer, and a desiccant are respectively installed on the upper surface of the base located on one side of the oil-injected screw air compressor. The output end of the oil-injected screw air compressor is connected to the output end of the air wet tank through a pipe, the output end of the air wet tank is connected to the input end of the refrigerated dryer through a pipe, and the input end of the refrigerated dryer is connected to the input end of the desiccant through a pipe.

[0019] The air wet tank stores compressed air and initially separates moisture, while the refrigerated dryer and desiccant dryer perform deep dehumidification. The air dry tank stores dry air, providing a clean air source for the adsorption tower and improving the purity and efficiency of nitrogen preparation.

[0020] According to the aforementioned energy-saving high-purity nitrogen manufacturing equipment, a storage tank and an air dryer are respectively installed on the upper surface of the base, which is located on one side of the refrigerated dryer and the desiccant. A silencer is installed on the upper surface of the base, which is located on one side of the air dryer. The output end of the desiccant is connected to the input end of the air dryer through a pipe. The output end of the air dryer is connected to one end of an air pipe through a pipe. One end of the exhaust pipe is connected to the input end of the storage tank through a pipe. One end of the silencer pipe is connected to the input end of the silencer through a pipe.

[0021] The storage tank collects nitrogen for subsequent processing; the silencer reduces exhaust noise; and the air dryer works in conjunction with the air pipe and silencer to optimize the gas delivery path and ensure stable and environmentally friendly system operation.

[0022] The beneficial effects of the energy-saving high-purity nitrogen production equipment of the present invention are as follows: 1. The heating chamber and heat exchange chamber of the second heating ring and the circulation chamber of the first heating ring are connected by a connecting pipe to form a thermal circulation system. Heat is transferred to the inside of the adsorption tower through a hollow distributor to preheat the air and activate the molecular sieve. At the same time, the waste heat of the oil-injected screw air compressor is utilized to reduce external energy consumption and achieve efficient utilization of thermal energy. The first connecting pipe and the second connecting pipe, together with the first parallel pipe and the second parallel pipe, realize the centralized distribution and circulation of heat from multiple sets of heating rings, ensuring uniform heating of each adsorption tower and improving heating stability and energy utilization.

[0023] 2. This energy-saving high-purity nitrogen production equipment uses an oil-injected screw air compressor in the recovery mechanism to compress air, and the oil tank and heat exchanger work together to circulate lubrication and cool down; the first and second adsorption towers in the preparation mechanism use a distributor and molecular sieve to adsorb and separate air to produce nitrogen.

[0024] 3. The heating mechanism utilizes the first and second heating rings in conjunction with a heat exchanger to recover the waste heat from the oil tank of the oil-injected screw air compressor, heating the distributor inside the adsorption tower. The high temperature promotes the rapid detachment of adsorbate in the molecular sieve, reducing energy consumption while improving the purity of nitrogen production. All mechanisms work together, and after pretreatment by an air wet tank, refrigerated dryer, and desiccant dryer, and noise reduction by a silencer, energy-saving and efficient operation of high-purity nitrogen production is achieved.

[0025] 4. The distributor aperture and molecular sieve micropores decrease from bottom to top, making the air distribution more uniform in the first and second adsorption towers, gradually filtering impurities, accurately adsorbing oxygen and other components, improving nitrogen separation efficiency and purity, and extending the service life of the molecular sieve.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is one of the three-dimensional diagrams of an energy-saving, high-purity nitrogen manufacturing equipment.

[0028] Figure 2 This is the second perspective view of an energy-saving, high-purity nitrogen manufacturing equipment.

[0029] Figure 3 This is the third perspective view of an energy-saving, high-purity nitrogen manufacturing equipment.

[0030] Figure 4 This is a three-dimensional view of the heating mechanism of an energy-saving high-purity nitrogen production equipment.

[0031] Figure 5 Another perspective view of the heating mechanism of an energy-saving high-purity nitrogen manufacturing equipment.

[0032] Figure 6 This is a cross-sectional view of the first adsorption tower of an energy-saving high-purity nitrogen production device.

[0033] Figure 7 This is a cross-sectional view of the first and second heating rings of an energy-saving high-purity nitrogen manufacturing device.

[0034] The components include: 1. Base; 2. Recovery mechanism; 201. Oil-injected screw air compressor; 202. Oil tank; 203. Heat exchanger; 204. Second circulation pump; 205. First circulation pipe; 206. Second circulation pipe; 207. First circulation pump; 208. Heat pipe; 209. Cold pipe; 3. Preparation mechanism; 301. Fixing frame; 302. First adsorption tower; 303. Second adsorption tower; 304. Distributor; 305. Exhaust pipe; 306. Molecular sieve; 307. Second transfer pipe; 308. Silencer pipe; 309. Second solenoid valve; 310. Third pressure equalizing valve; 311. 312. Air pipe; 313. First solenoid valve; 314. Second equalizing valve; 315. First equalizing valve; 316. Inlet pipe; 317. First adapter pipe; 318. Outlet pipe; 4. Heating mechanism; 401. First heating ring; 402. Second heating ring; 403. First connecting pipe; 404. Second connecting pipe; 405. First parallel pipe; 406. Heating chamber; 407. Heat exchange chamber; 408. Circulation chamber; 409. Connecting pipe; 410. Second parallel pipe; 5. Refrigerated dryer; 6. Storage tank; 7. Desiccant dryer; 8. Air dry canister; 9. Air wet canister; 10. Silencer. Detailed Implementation

[0035] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0036] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0037] In the description of this invention, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0038] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0039] Reference Figures 1-7 This invention discloses an energy-saving high-purity nitrogen manufacturing device, comprising: a base 1, a recovery mechanism 2, a preparation mechanism 3, and a heating mechanism 4. The recovery mechanism 2 includes an oil-injected screw air compressor 201, which is disposed on one side of the upper end of the base 1. An oil tank 202 is provided on one side of the upper end of the oil-injected screw air compressor 201, and a heat exchanger 203 is fixedly installed on one side of the oil tank 202. The preparation mechanism 3 includes a fixing frame 301, which is disposed on the other side of the upper end of the base 1. A first adsorption tower 302 and a second adsorption tower 303 are respectively installed on both sides of the upper end face of the fixing frame 301. A plurality of distributors 304 are installed sequentially from bottom to top inside the first adsorption tower 302 and the second adsorption tower 303, and a molecular sieve 306 is provided at the upper end of each of the distributors 304. The heating mechanism... 4 includes several first heating rings 401 and several second heating rings 402. The first heating rings 401 and the second heating rings 402 are respectively sleeved on the outside of the second adsorption tower 303 and the first adsorption tower 302, and correspond one-to-one with several distributors 304. The inner sides of the second heating ring 402 are respectively provided with heating chambers 406 and heat exchange chambers 407. The inner side of the first heating ring 401 is provided with a circulation chamber 408. A connecting pipe 409 is installed on one side of each heating chamber 406 and heat exchange chamber 407. The other end of each pair of connecting pipes 409 is connected to the input end and the output end of the circulation chamber 408, respectively. The interior of each distributor 304 is hollow. The two ends of the interior of each distributor 304 are connected to their corresponding heating chambers 406 and circulation chambers 408 through pipes, respectively.

[0040] Specifically, the oil-injected screw air compressor 201 of the recovery mechanism 2 compresses air, and the oil tank 202 and heat exchanger 203 work together to circulate lubrication and cool the air; the first adsorption tower 302 and the second adsorption tower 303 of the preparation mechanism 3 adsorb and separate air to produce nitrogen through the molecular sieve 306 via the distributor 304; the heating mechanism 4 uses the first heating ring 401 and the second heating ring 402 in conjunction with the heat exchanger 203 to recover the waste heat in the oil tank 202 of the oil-injected screw air compressor 201, and heats the distributor 304 in the adsorption tower. The high temperature promotes the rapid detachment of adsorbate in the molecular sieve 306, reducing energy consumption. Meanwhile, to improve the purity of nitrogen preparation, all mechanisms work together. After pretreatment by air wet tank 9, cold dryer 5, and desiccant 7, and noise reduction by silencer 10, energy-saving and efficient operation of high-purity nitrogen preparation is achieved. The heating chamber 406 and heat exchange chamber 407 of the second heating ring 402 and the circulation chamber 408 of the first heating ring 401 are connected by a connecting pipe 409 to form a thermal circulation system. Heat is transferred to the inside of the adsorption tower through the hollow distributor 304 to preheat the air and activate the molecular sieve 306. At the same time, the waste heat of the oil-injected screw air compressor 201 is used to reduce external energy consumption and achieve efficient utilization of thermal energy.

[0041] Optionally, the pore size of a plurality of distributors 304 located inside the first adsorption tower 302 and the second adsorption tower 303 gradually decreases from bottom to top, and the micropores of molecular sieves 306 located at the upper ends of the plurality of distributors 304 located inside the first adsorption tower 302 and the second adsorption tower 303 gradually decrease from bottom to top.

[0042] Optionally, a first connecting pipe 403 and a second connecting pipe 404 are respectively inserted into one end of the second heating ring 402. One end of the first connecting pipe 403 communicates with the heating chamber 406, and the second connecting pipe 404 communicates with the heat exchange chamber 407. A first connecting pipe is installed between one end of several of the first connecting pipes 403. Optionally, a first circulating pump 207 is fitted at the shell-side outlet of the heat exchanger 203, and a heat pipe 208 is fitted at the output end of the first circulating pump 207. A cold pipe 209 is fitted at the shell-side inlet of the heat exchanger 203. One end of the heat pipe 208 is connected to one side of the first parallel pipe 405, and one end of the cold pipe 209 is connected to one side of the second parallel pipe 410.

[0043] Optionally, a second circulation pump 204 is installed on the upper side of one side of the oil tank 202. A first circulation pipe 205 is sleeved on the output end of the second circulation pump 204. One end of the first circulation pipe 205 is connected to the tube-side inlet of the heat exchanger 203. A second circulation pipe 206 is installed on the bottom side of the oil tank 202. One end of the second circulation pipe 206 is connected to the tube-side outlet of the heat exchanger 203.

[0044] Optionally, an outlet pipe 317 is installed at the top of both the first adsorption tower 302 and the second adsorption tower 303. A first transfer pipe 316 is sleeved on one end of each outlet pipe 317. A first pressure equalizing valve 314 is sleeved on the bottom end of the opposing surfaces of a pair of first transfer pipes 316. An exhaust pipe 305 is sleeved between the pair of first pressure equalizing valves 314. A second pressure equalizing valve 313 is installed between the upper ends of the opposing surfaces of a pair of first transfer pipes 316.

[0045] Optionally, an air inlet pipe 315 is installed at the bottom of both the first adsorption tower 302 and the second adsorption tower 303. A second transfer pipe 307 is sleeved on one end of each air inlet pipe 315. A first solenoid valve 312 is sleeved on the top of each pair of opposing surfaces of the second transfer pipes 307. An air pipe 311 is sleeved between the pair of first solenoid valves 312. A second solenoid valve 309 is sleeved on the bottom of each pair of opposing surfaces of the second transfer pipes 307. A silencer pipe 308 is sleeved between the pair of second solenoid valves 309. A third pressure equalizing valve 310 is installed between the opposing surfaces of the pair of second transfer pipes 307.

[0046] Optionally, an air humidifier 9, a refrigerated dryer 5, and a desiccant 7 are respectively installed on the upper surface of the base 1 on one side of the oil-injected screw air compressor 201. The output end of the oil-injected screw air compressor 201 is connected to the output end of the air humidifier 9 through a pipe. The output end of the air humidifier 9 is connected to the input end of the refrigerated dryer 5 through a pipe. The input end of the refrigerated dryer 5 is connected to the input end of the desiccant 7 through a pipe.

[0047] Optionally, a storage tank 6 and an air drying tank 8 are respectively installed on the upper surface of the base 1 on one side of the refrigerated dryer 5 and the desiccant 7. A silencer 10 is installed on the upper surface of the base 1 on one side of the air drying tank 8. The output end of the desiccant 7 is connected to the input end of the air drying tank 8 through a pipe. The output end of the air drying tank 8 is connected to one end of the air pipe 311 through a pipe. One end of the exhaust pipe 305 is connected to the input end of the storage tank 6 through a pipe. One end of the silencer pipe 308 is connected to the input end of the silencer 10 through a pipe.

[0048] Specifically, when using this energy-saving high-purity nitrogen manufacturing equipment, the oil-injected screw air compressor 201 first compresses the air. The compressed air then undergoes preliminary dehumidification in the air humidifier 9, deep drying in the refrigerated dryer 5 and the desiccant dryer 7, and is then stored in the air dryer 8. Subsequently, the air enters the first adsorption tower 302 or the second adsorption tower 303 through the air pipe 311, the second transfer pipe 307, and the inlet pipe 315, and is regulated by the first solenoid valve 312 and the second solenoid valve 309. The air then passes through the tower... The nitrogen gas is evenly distributed through a distributor 304 with decreasing pore size from bottom to top. When passing through a molecular sieve 306 with gradually smaller micropores, impurities such as oxygen are adsorbed, and high-purity nitrogen gas is discharged through the outlet pipe 317 and the first transfer pipe 316. At the same time, the lubricating oil in the oil tank 202 enters the heat exchanger 203 for cooling through the second circulation pump 204 and the first circulation pipe 205, and then flows back to the oil tank 202 through the second circulation pipe 206. The high-temperature oil in the shell side of the heat exchanger 203 is transported to the second circulation pump 207 through the heat pipe 208. A parallel pipe 405 enters the heating chamber 406 of the second heating ring 402 through the first connecting pipe 403. Heat is transferred to the adsorption tower via the hollow distributor 304 to activate the molecular sieve 306. The cooled oil returns to the heat exchanger 203 through the heat exchange chamber 407, the second connecting pipe 404, the second parallel pipe 410, and the cold pipe 209, forming a waste heat recovery cycle. The two adsorption towers balance the pressure through the first equalizing valve 314, the second equalizing valve 313, and the third equalizing valve 310. During desorption, the waste gas is silenced. The nitrogen gas is discharged through pipe 308 and silencer 10 and stored in storage tank 6. During the preparation process, the first adsorption tower 302 and the second adsorption tower 303 are used alternately under the control of the first solenoid valve 312 and the second solenoid valve 309. When one of the first adsorption tower 302 or the second adsorption tower 303 is in use, the other is depressurized to allow the adsorbate in the molecular sieve 306 to be discharged and regenerated. The two are used in a cycle to improve the nitrogen preparation effect. The whole process realizes energy-saving preparation and efficient operation of high-purity nitrogen.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An energy-saving high-purity nitrogen production equipment, characterized in that, It includes a base, a recycling mechanism, a preparation mechanism, and a heating mechanism. The recycling mechanism includes an oil-injected screw air compressor, which is located on one side of the upper end of the base. An oil tank is provided on one side of the upper end of the oil-injected screw air compressor, and a heat exchanger is fixedly installed on one side of the oil tank. The preparation mechanism includes a fixing frame disposed on the other side of the upper end of the base. A first adsorption tower and a second adsorption tower are respectively installed on both sides of the upper end face of the fixing frame. A plurality of distributors are installed sequentially from bottom to top inside the first adsorption tower and the second adsorption tower. A molecular sieve is provided at the upper end of each of the distributors. The heating mechanism includes a plurality of first heating rings and a plurality of second heating rings. The plurality of first heating rings and second heating rings are respectively sleeved on the outside of the second adsorption tower and the first adsorption tower, and correspond one-to-one with the plurality of distributors. The second heating ring has a heating chamber and a heat exchange chamber on its two sides, and the first heating ring has a circulation chamber. Each heating chamber and heat exchange chamber has a connecting pipe installed on one side. The other end of each pair of connecting pipes is connected to the input end and the output end of the circulation chamber, respectively. The inside of each distributor is hollow. Both ends of the distributor are connected to their corresponding heating chamber and circulation chamber through pipes.

2. The energy-saving high-purity nitrogen manufacturing equipment according to claim 1, characterized in that, The pore size of several distributors located inside the first adsorption tower and the second adsorption tower gradually decreases from bottom to top, and the molecular sieve micropores at the upper ends of several distributors located inside the first adsorption tower and the second adsorption tower gradually decrease from bottom to top.

3. The energy-saving high-purity nitrogen manufacturing equipment according to claim 1, characterized in that, One end of the second heating ring is respectively inserted with a first connecting pipe and a second connecting pipe. One end of the first connecting pipe is connected to the heating chamber, and the second connecting pipe is connected to the heat exchange chamber. A first parallel pipe is installed between one end of several first connecting pipes, and a second parallel pipe is installed between one end of several second connecting pipes.

4. The energy-saving high-purity nitrogen manufacturing equipment according to claim 3, characterized in that, The shell-side outlet of the heat exchanger is fitted with a first circulating pump, and the output end of the first circulating pump is fitted with a heat pipe. The shell-side inlet of the heat exchanger is fitted with a cold pipe. One end of the heat pipe is connected to one side of a first parallel pipe, and one end of the cold pipe is connected to one side of a second parallel pipe.

5. The energy-saving high-purity nitrogen manufacturing equipment according to claim 4, characterized in that, A second circulation pump is installed on the upper side of one side of the oil tank. A first circulation pipe is sleeved on the output end of the second circulation pump. One end of the first circulation pipe is connected to the tube-side inlet of the heat exchanger. A second circulation pipe is installed on the bottom side of the oil tank. One end of the second circulation pipe is connected to the tube-side outlet of the heat exchanger.

6. The energy-saving high-purity nitrogen manufacturing equipment according to claim 5, characterized in that, Both the first adsorption tower and the second adsorption tower are equipped with an exhaust pipe at their top ends. A first transfer pipe is fitted onto one end of each exhaust pipe. A first equalizing valve is fitted onto the bottom end of the opposing surfaces of a pair of first transfer pipes. An exhaust pipe is fitted between the pair of first equalizing valves. A second equalizing valve is installed between the upper ends of the opposing surfaces of a pair of first transfer pipes.

7. The energy-saving high-purity nitrogen manufacturing equipment according to claim 6, characterized in that, Both the first adsorption tower and the second adsorption tower are equipped with air inlet pipes at their bottom ends. Each air inlet pipe is fitted with a second transfer pipe. Each pair of second transfer pipes is fitted with a first solenoid valve at the top of their opposing surfaces. An air pipe is fitted between the pair of first solenoid valves. Each pair of second transfer pipes is fitted with a second solenoid valve at the bottom of their opposing surfaces. A silencer pipe is fitted between the pair of second solenoid valves. A third pressure equalization valve is installed between the opposing surfaces of the pair of second transfer pipes.

8. The energy-saving high-purity nitrogen manufacturing equipment according to claim 7, characterized in that, An air humidifier, a refrigerated dryer, and a desiccant are respectively installed on the upper surface of the base, which is located on one side of the oil-injected screw air compressor. The output end of the oil-injected screw air compressor is connected to the output end of the air humidifier through a pipe. The output end of the air humidifier is connected to the input end of the refrigerated dryer through a pipe. The input end of the refrigerated dryer is connected to the input end of the desiccant through a pipe.

9. The energy-saving high-purity nitrogen manufacturing equipment according to claim 8, characterized in that, The upper surface of the base, located on one side of the desiccant dryer, is equipped with a storage tank and an air drying tank. A silencer is installed on the upper surface of the base, located on one side of the air drying tank. The output end of the desiccant dryer is connected to the input end of the air drying tank via a pipe. The output end of the air drying tank is connected to one end of an air pipe via a pipe. One end of the exhaust pipe is connected to the input end of the storage tank via a pipe. One end of the silencer pipe is connected to the input end of the silencer via a pipe.

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