A two-pole series adsorption tower oxygen production equipment

Abstract

A two-pole series adsorption tower oxygen production equipment comprises a first adsorption and desorption part, a second adsorption and desorption part, a linkage device, a base and a control end; the first adsorption and desorption part and the second adsorption and desorption part both comprise a nitrogen adsorption device and a nitrogen desorption device, the nitrogen adsorption device in the same part is connected with the nitrogen desorption device, the nitrogen desorption devices in the first adsorption and desorption part and the second adsorption and desorption part are both installed on the base and synchronously driven by the linkage device; the invention realizes nitrogen adsorption and nitrogen desorption in one tower at the same time, and can perform double separation on compressed air, so as to obtain oxygen with higher purity; the first adsorption and desorption part and the second adsorption and desorption part can both use two nitrogen adsorption devices in parallel to produce oxygen, when one group of nitrogen adsorption devices is damaged, the other group of nitrogen adsorption devices in the same part can still continue to work, and at the same time, the parallel connection method also solves the problem of super height of large-sized adsorption towers, and can be applicable to more working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of oxygen production by adsorption towers, and in particular to oxygen production equipment with two-pole series-connected adsorption towers. Background Art

[0002] The pressure swing adsorption oxygen generator is mainly composed of two adsorption towers filled with molecular sieves. Under normal temperature conditions, the compressed air enters the adsorption tower after filtering, dehydration and drying. In the adsorption tower, nitrogen and other gases in the air are adsorbed by the molecular sieve, and oxygen is enriched in the gas phase. It flows out from the outlet and is stored in the oxygen buffer tank. In the other tower, the molecular sieve that has completed adsorption is quickly depressurized to desorb the adsorbed components. The two towers are circulated alternately to obtain high-purity and cheap oxygen.

[0003] The pressure swing adsorption oxygen generator has the advantages of simple process, low operating cost, low energy consumption and high efficiency, so it is widely used in metallurgical combustion, chemical industry, environmental protection, building materials, light industry, medical treatment, aquaculture, biotechnology, sewage treatment and other fields.

[0004] However, the existing pressure swing adsorption oxygen generator must have two towers to achieve simultaneous adsorption and desorption, and can only adsorb and desorb compressed air once, which may cause the problem of incomplete oxygen separation; at the same time, in some situations where a large amount of oxygen production is required, the two adsorption towers in the original oxygen generator need to be large in size to meet production needs, and the large-sized adsorption tower has the problem of being too high, and may not be able to adapt to the height of the internal space of the factory building, and increases the difficulty of installing the adsorption tower, increasing the safety risks during the installation process. Summary of the invention

[0005] In view of the above problems, the present invention proposes a two-pole series adsorption tower oxygen production equipment, and the technical solution used is:

[0006] A bipolar series adsorption tower oxygen production equipment comprises a first adsorption and desorption part, a second adsorption and desorption part, a linkage device, a base and a control end; the first adsorption and desorption part and the second adsorption and desorption part both comprise a nitrogen adsorption device and a nitrogen desorption device, the nitrogen adsorption device and the nitrogen desorption device in the same part are connected through a pipeline 1, a one-way valve and a manual valve are provided on the pipeline 1, and the gas flows from the nitrogen adsorption device to the nitrogen desorption device in a one-way direction; the nitrogen adsorption devices in the first adsorption and desorption part and the second adsorption and desorption part are connected through a pipeline 2, a one-way valve and a manual valve are provided on the pipeline 2, and the gas flows from the nitrogen adsorption device in the first adsorption and desorption part to the nitrogen desorption device in the first adsorption and desorption part The outlet of the device flows unidirectionally into the inlet of the nitrogen adsorption device in the second adsorption and desorption section; the inlet of the nitrogen adsorption device in the first adsorption and desorption section is connected with the pipeline three, and the compressed air enters the nitrogen adsorption device in the first adsorption and desorption section through the pipeline three; the outlet of the nitrogen adsorption device in the second adsorption and desorption section is connected with the oxygen tank through the pipeline four, and a one-way valve is provided on the pipeline four, and high-concentration oxygen enters the oxygen tank through the pipeline four; the nitrogen desorption devices in the first adsorption and desorption section and the second adsorption and desorption section are both installed on the base and are synchronously driven by the linkage device; the control end is used to control the operation of the entire two-pole series adsorption tower oxygen production equipment.

[0007] Furthermore, each nitrogen adsorption device includes a separation tower, a molecular sieve and a rotating assembly; the separation tower is vertically installed on the ground, the separation tower is connected to the corresponding nitrogen desorption device through pipeline one, and the separation towers in the first adsorption and desorption section and the second adsorption and desorption section are connected through pipeline two; the interior of the molecular sieve is divided into a main area and a spare area, and the molecular sieve is rotatably installed inside the separation tower and driven to rotate by the rotating assembly; an airtight partition is provided between the main area and the spare area; the main area and the spare area of ​​the molecular sieve of the first adsorption and desorption section are alternately connected to pipeline two, and the main area and the spare area of ​​the molecular sieve of the second adsorption and desorption section are alternately connected to pipeline four.

[0008] Furthermore, the rotating assembly includes a rotating motor, a rotating gear 1, a rotating gear 2 and a rotating shaft; the rotating shaft is coaxially fixedly connected to the molecular sieve and rotatably installed in the separation tower; the rotating motor is fixedly installed on the outer wall of the separation tower, and its output end is coaxially fixedly connected to the rotating gear, and the rotating gear 2 is coaxially fixedly installed on the rotating shaft; the rotating gear 1 is meshed with the rotating gear 2.

[0009] Furthermore, each nitrogen desorption device comprises a negative pressure chamber, a sliding plate, a baffle and a driving mechanism; the negative pressure chamber is fixedly mounted on a base, the sliding plate is slidably mounted in the negative pressure chamber, and divides the internal space of the negative pressure chamber into inner and outer parts during the sliding process; the innermost end of the negative pressure chamber is connected to a separation tower via a pipe 1; a ventilation duct parallel to the sliding direction of the sliding plate is provided on the right side wall of the negative pressure chamber, a vent is provided at the innermost end of the ventilation duct, and is connected to the internal space of the negative pressure chamber via the vent; an air outlet is provided at the outermost end of the ventilation duct; the baffle is slidably mounted in the ventilation duct, and when the baffle slides outside the vent, the inner end of the ventilation duct can be closed; the driving mechanism is used to drive the sliding plate and the baffle to slide; a one-way valve for exhausting air to the outside is provided on the negative pressure chamber.

[0010] Furthermore, the driving mechanism comprises a rack, a linkage rod, a spring 1, a card plate, a spring 2 and a slide slot frame; the sliding plate is elastically connected to the outermost end of the negative pressure chamber through a plurality of spring 1s; the slide slot frame is located outside the negative pressure chamber and is fixedly mounted on the base; a limiting slide slot is provided on the slide slot frame, and a guide rod is fixedly mounted inside; the innermost end of the rack is hinged on the sliding plate, and a sliding shaft is provided on the outermost end, and the sliding shaft is slidably mounted in the limiting slide slot and slides along the edge of the guide rod; one end of the linkage rod is fixedly mounted on the rack, and the other end is hinged to the baffle; the card plate is arranged below the rack, and is elastically connected to the inner wall of the negative pressure chamber through spring 2;

[0011] A boss is provided in the middle of the bottom end of the rack, which protrudes downward and intermittently contacts the clamping plate, and the innermost end of the boss gradually rises and transitions to the inner end of the rack; the limiting slide groove is a closed slide groove arranged around the guide rod as a whole, and the upper corner of the limiting slide groove at the outermost end is a sloped edge sloping downward from the inside to the outside, and the outermost end of the guide rod is a slope sloping downward from the outside to the inside.

[0012] Furthermore, the linkage device includes a servo drive motor, a worm, a worm wheel, a transmission shaft 1, a transmission gear 1, a connecting plate, a transmission gear 2, a cylinder, a turntable, a clamping rod, a spring 3, a transmission shaft 2 and a counting sensor; the servo drive motor is fixedly mounted on the base, and its telescopic end is coaxially fixedly connected to the worm, and the worm is rotatably mounted on the base; the transmission shaft 1 is rotatably mounted on the base, and the worm wheel, the transmission gear 1 and the connecting plate are all coaxially fixedly mounted on the transmission shaft 1; the worm wheel is meshed with the worm, and the transmission gear 1 is intermittently meshed with the rack of the first adsorption and desorption part; a counting plate is fixedly mounted on the side wall of the connecting plate, and an embedded hole is eccentrically provided inside the connecting plate; the transmission shaft 2 is rotatably mounted on the base, and its axis It coincides with the axis of the transmission shaft one; the transmission gear two is coaxially fixedly installed on the transmission shaft two, and the turntable is coaxially slidably installed on the transmission shaft two; the transmission gear two is intermittently meshed with the rack of the second adsorption and desorption unit; the cylinder is fixedly installed on the base, and its telescopic end is parallel to the transmission shaft two and slidably connected to the turntable; the clamping rod is parallel to the transmission shaft two, and the left end of the clamping rod is eccentrically fixed on the turntable, the rod body passes through the transmission gear two, and the right end cooperates with the embedding hole and is intermittently inserted into the embedding hole; the spring three is installed between the transmission gear two and the turntable; the counting sensor is fixedly installed on the negative pressure chamber of the second adsorption and desorption unit, and counts the number of rotations of the counting plate, and the counting sensor counts once for each rotation of the counting plate.

[0013] Furthermore, two groups of nitrogen adsorption devices are respectively provided in the first adsorption and desorption section and the second adsorption and desorption section, and the two groups of nitrogen adsorption devices in the same section are connected in parallel. Pipeline 2 connects the parallel nitrogen adsorption devices in the first adsorption and desorption section and the second adsorption and desorption section in series.

[0014] Since the present invention adopts the above technical solution, the present invention has the following advantages:

[0015] 1. The present invention realizes simultaneous nitrogen adsorption and nitrogen desorption in one tower through the coordinated design of a nitrogen adsorption device, a nitrogen desorption device and a linkage device, and is provided with a first adsorption and desorption section and a second adsorption and desorption section to perform double separation on compressed air, thereby obtaining higher purity oxygen.

[0016] 2. Both the first adsorption and desorption section and the second adsorption and desorption section of the present invention can use two nitrogen adsorption devices in parallel to produce oxygen. When one set of nitrogen adsorption devices is damaged, the other set of nitrogen adsorption devices in the same section can continue to work. At the same time, the parallel connection method also solves the problem of super-height of large-sized adsorption towers and can be applied to more working conditions.

[0017] 3. The linkage device of the present invention is designed according to the difference in nitrogen content between the first adsorption and desorption section and the second adsorption and desorption section. After the nitrogen desorption device of the first adsorption and desorption section is started several times, the second adsorption and desorption section is started again, which can achieve the purpose of energy saving to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1-2 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 3 Schematic diagram of the internal structure of the nitrogen adsorption device of the present invention.

[0020] Figure 4 It is a schematic diagram of the assembly structure of the nitrogen desorption device and the linkage device of the present invention.

[0021] Figure 5-7 It is a schematic diagram of the assembly structure of the nitrogen desorption device of the present invention.

[0022] Figure 8-9 It is a schematic diagram of the partial structure of the nitrogen desorption device of the present invention.

[0023] Fig.10 It is a schematic diagram of the assembly structure of the driving device of the present invention.

[0024] Fig.11 It is a schematic diagram of the connection between the control terminal and the electrical components of the present invention.

[0025] Figure Number:

[0026] 1-Nitrogen adsorption device;

[0027] 101-separation tower; 102-molecular sieve (1021-main area; 1022-spare area); 103-rotating assembly (1031-rotating motor; 1032-rotating gear 1; 1033-rotating gear 2; 1034-rotating shaft);

[0028] 2-Nitrogen desorption device;

[0029] 201-negative pressure chamber (2011-ventilation duct; 2012-ventilation port; 2013-air outlet); 202-sliding plate; 203-rack (2031-sliding shaft; 2032-boss); 204-linking rod; 205-baffle; 206-spring 1; 207-card; 208-spring 2; 209-slideway frame (2091-limiting slideway; 2092-guide rod);

[0030] 3- linkage device;

[0031] 301-servo drive motor; 302-worm; 303-worm wheel; 304-transmission shaft 1; 305-transmission gear 1; 306-connecting plate (3061-counting plate; 3062-embedded hole); 307-transmission gear 2; 308-cylinder; 309-turntable; 310-clamp rod; 311-spring 3; 312-transmission shaft 2; 313-counting sensor;

[0032] 4- Base;

[0033] 5-Control terminal. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further specifically described below by way of embodiments and in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0035] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "in", "out", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0036] Example:

[0037] like Figure 1-2 As shown, a two-pole series adsorption tower oxygen production equipment includes a first adsorption and desorption section, a second adsorption and desorption section, a linkage device 3, a base 4 and a control end 5; the first adsorption and desorption section and the second adsorption and desorption section each include two groups of nitrogen adsorption devices 1 and one group of nitrogen desorption devices 2, and the nitrogen desorption devices 2 in the first adsorption and desorption section and the second adsorption and desorption section are both installed on the base 4 and synchronously driven by the linkage device 3.

[0038] like Figure 3As shown, each nitrogen adsorption device 1 includes a separation tower 101, a molecular sieve 102 and a rotating assembly 103; the separation tower 101 is vertically installed on the ground; the interior of the molecular sieve 102 is divided into a main area 1021 and a spare area 1022, and the molecular sieve 102 is rotatably installed in the separation tower 101 and driven to rotate by the rotating assembly 103; an airtight partition is provided between the main area 1021 and the spare area 1022; the rotating assembly 103 includes a rotating motor 1031, a rotating gear 1 1032, a rotating gear 2 1033 and a rotating shaft 1034; the rotating shaft 1034 is coaxially fixedly connected to the molecular sieve 102 and rotatably installed in the separation tower 101; the rotating motor 1031 is fixedly installed on the outer wall of the separation tower 101, and its output end is coaxially fixedly connected to the rotating gear 1 1032, and the rotating gear 2 1033 is coaxially fixedly installed on the rotating shaft 1034; the rotating gear 1 1032 is meshed with the rotating gear 2 1033.

[0039] like Figure 4-10 As shown, each nitrogen desorption device 2 includes a negative pressure chamber 201, a sliding plate 202, a rack 203, a linkage rod 204, a baffle 205, a spring 1 206, a clamping plate 207, a spring 208 and a slide frame 209; the negative pressure chamber 201 is fixedly mounted on the base 4, and the sliding plate 202 is slidably mounted in the negative pressure chamber 201, and the internal space of the negative pressure chamber 201 is divided into an inner and an outer part during the sliding process; the right side wall of the negative pressure chamber 201 is provided with a sliding plate 202 The ventilation duct 2011 is parallel to the sliding direction, and the innermost end of the ventilation duct 2011 is provided with a vent 2012, and is connected to the inner space of the negative pressure chamber 201 through the vent 2012; the outermost end of the ventilation duct 2011 is provided with an air outlet 2013; the baffle 205 is slidably installed in the ventilation duct 2011, and when the baffle 205 slides outside the vent 2012, the inner end of the ventilation duct 2011 can be closed; the negative pressure chamber 201 is provided with a one-way valve for exhausting air to the outside;

[0040] The sliding plate 202 is elastically connected to the outermost end of the negative pressure chamber 201 through a spring 206 installed at the left and right ends inside the negative pressure chamber 201, and the spring 206 is a compression spring; the slide slot frame 209 is located outside the negative pressure chamber 201 and is fixedly installed on the base 4; a limiting slide slot 2091 is provided on the slide slot frame 209, and a guide rod 2092 is fixedly installed inside; the limiting slide slot 2091 is a closed slide slot arranged around the guide rod 2092 as a whole, and the upper corner of the limiting slide slot 2091 at the outermost end is a sloped edge that tilts downward from the inside to the outside, and the outermost end of the guide rod 2092 is a sloped shape that tilts downward from the outside to the inside; the innermost end of the rack 2031 is hinged It is connected to the sliding plate 202, and a sliding shaft 2031 is provided on the outermost end. The sliding shaft 2031 is slidably installed in the limiting sliding groove 2091 and slides along the edge of the guide rod 2092; one end of the linkage rod 204 is fixedly installed on the rack 203, and the other end is hinged to the baffle 205; the clamping plate 207 is arranged below the rack 2031, and is elastically connected to the inner bottom surface of the negative pressure chamber 201 through the spring 208, and the spring 208 is a compression spring; a boss 2032 is provided in the middle of the bottom end of the rack 203, and the boss 2032 protrudes downward and intermittently contacts with the clamping plate 207, and the innermost end of the boss 2032 gradually rises and transitions to the inner end of the rack 2031;

[0041] The linkage device 3 includes a servo drive motor 301, a worm 302, a worm wheel 303, a transmission shaft 1 304, a transmission gear 1 305, a connecting plate 306, a transmission gear 2 307, a cylinder 308, a rotating plate 309, a clamping rod 310, a spring 311, a transmission shaft 2 312 and a counting sensor 313; the servo drive motor 301 is fixedly installed on the base 4, and its telescopic end is coaxially fixedly connected with the worm 302, and the worm 302 is rotatably installed on the base 4; the transmission shaft A 304 is rotatably mounted on the base 4, and the worm wheel 303, the transmission gear 1 305, and the connecting plate 306 are all coaxially fixedly mounted on the transmission shaft 1 304; the worm wheel 303 is meshed with the worm 302, and the transmission gear 1 305 is intermittently meshed with the rack 203 of the first adsorption and desorption part; a counting plate 3061 is fixedly mounted on the side wall of the connecting plate 306, and an embedding hole 3062 is eccentrically provided inside the connecting plate 306; the transmission shaft 2 312 is rotatably mounted on the base 4, and its axis is aligned with The axis of the transmission shaft 1 304 coincides; the transmission gear 2 307 is coaxially fixedly installed on the transmission shaft 2 312, and the turntable 309 is coaxially slidably installed on the transmission shaft 2 312; the transmission gear 2 307 is intermittently meshed with the rack 203 of the second adsorption and desorption unit; the cylinder 308 is fixedly installed on the base 4, and its telescopic end is parallel to the transmission shaft 2 312 and is slidably connected to the turntable 309; the clamping rod 310 is parallel to the transmission shaft 2 312, and the left end of the clamping rod 310 is eccentrically fixedly installed on the turntable On 309, the rod body passes through the transmission gear 2 307, and the right end cooperates with the embedding hole 3062 and is intermittently inserted into the embedding hole 3062; the spring 311 is installed between the transmission gear 2 307 and the turntable 309, and the spring 311 is a compression spring; the counting sensor 313 is fixedly installed on the negative pressure chamber 201 of the second adsorption and desorption part, and counts the number of rotations of the counting plate 3061. The counting sensor 313 counts once for each rotation of the counting plate 3061.

[0042] Each separation tower 101 has an air inlet and an exhaust port at the bottom end;

[0043] The tops of the two separation towers 101 in the first adsorption and desorption section are connected in parallel through a pipeline five to form an oxygen output port one, and the main area 1021 and the spare area 1022 of the molecular sieve 102 in the first adsorption and desorption section are alternately connected to the oxygen output port one; the two air inlets at the bottom ends of the two separation towers 101 in the first adsorption and desorption section are connected to the compressed air pipe through a pipeline three arranged in parallel, and at the same time, the two exhaust ports at the bottom ends are connected to the innermost end of the corresponding negative pressure chamber 201 through a pipeline one arranged in parallel;

[0044] The tops of the two separation towers 101 in the second adsorption and desorption section are connected in parallel through a pipeline 4 to form an oxygen output port 2, and the main area 1021 and the spare area 1022 of the molecular sieve 102 in the second adsorption and desorption section are alternately connected to the oxygen output port 2; the two air inlets at the bottom ends of the two separation towers 101 in the second adsorption and desorption section are connected to one end of the pipeline 2 through a pipeline 6 arranged in parallel, and the other end of the pipeline 2 is connected to the oxygen output port 1, and at the same time, the two exhaust ports at the bottom are connected to the innermost end of the corresponding negative pressure chamber 201 through a pipeline 1 arranged in parallel;

[0045] One-way valves are installed in pipeline one, pipeline two, pipeline three, pipeline four, pipeline five and pipeline six, and manual valves are also installed on pipeline one, pipeline two, pipeline three and pipeline six for emergency closure of each pipeline in case of emergencies.

[0046] like Fig.11 As shown, the control terminal 5 includes a main controller, a human-machine interactive display screen, an information transmission module, a storage module and a power module, and the main controller is electrically connected to the human-machine interactive display screen, the information transmission module, the storage module, the power module, the rotating motor 1031, the servo drive motor 301, and the counting sensor 313; the main controller is used to control the operation of the entire oxygen production equipment; the human-machine interactive display screen is used to set the working time and the set count of the counting sensor 313 and the automatic operation control after the set value is determined; the information transmission module is used for information transmission between the main controller and the nitrogen adsorption device 1 and the linkage device 3; the power module is used to provide a stable power supply for the control terminal 5; the storage module is used to store the operation information data of the entire oxygen production equipment.

[0047] Working principle of this embodiment:

[0048] First, the compressed air enters the two separation towers 101 in the first adsorption and desorption part through pipeline 3. When the compressed air passes through the molecular sieve 102, the nitrogen is adsorbed by the molecular sieve 102, and the oxygen enters the oxygen output port 1 through pipeline 5. This is the first adsorption. The oxygen enters the two separation towers 101 in the second adsorption and desorption part along pipeline 2 and pipeline 6, passes through the molecular sieve 102 therein, and undergoes the second adsorption. Finally, high-purity oxygen is obtained, and the high-purity oxygen flows out from the oxygen output port 2.

[0049] Since two groups of nitrogen adsorption devices 1 are provided in parallel in the first adsorption and desorption section and the second adsorption and desorption section, when one group of nitrogen adsorption devices 1 in the same section is damaged and cannot work normally, the other group of nitrogen adsorption devices 1 in the same section can still perform nitrogen adsorption work, and will not affect the normal oxygen production.

[0050] In the initial state, the top of the main area 1021 of the molecular sieve 102 in the first adsorption and desorption section and the second adsorption and desorption section is connected to the oxygen output port 1 or the oxygen output port 2, and the bottom is connected to the air inlet for adsorbing nitrogen. At this time, the bottom of the standby area 1022 is connected to the exhaust port; the main area 1021 in the molecular sieve 102 preferentially adsorbs nitrogen. When the nitrogen adsorption in the main area 1021 in the molecular sieve 102 reaches a critical state, the rotating motor 1031 is started, and the rotating motor 1031 drives the rotating gear 1 1032 to rotate, and the rotating gear 1 1032 drives the rotating gear 2 1033 to rotate, thereby driving the rotating The shaft 1034 rotates, and the rotating shaft 1034 drives the molecular sieve 102 to rotate, and the top of the standby area 1022 is connected to the oxygen production outlet 1 or the oxygen production outlet 2, and the bottom is connected to the air inlet, and the standby area 1022 adsorbs nitrogen, while the bottom of the main area 1021 is connected to the exhaust port for desorption; when the desorption of the main area 1021 is completed, the rotating motor 1031 is started again to rotate the molecular sieve 102, and the main area 1021 is connected to the oxygen production outlet 1 or the oxygen production outlet 2 again, and the standby area 1022 is desorbed; in this cycle, adsorption and desorption are completed simultaneously in the same separation tower 101.

[0051] In the initial state, the sliding plate 202 is located outside the vent 2012, the space inside the sliding plate 202 in the negative pressure chamber 201 connects the pipe 1 with the vent 2012, and the baffle 205 is located at the innermost end of the ventilation pipe 2011, and the air outlet 2013 is connected with the pipe 1 through the vent 2012; at the same time, the boss 2032 of the rack 203 presses down the clamping plate 207, and the spring 208 is compressed;

[0052] When nitrogen is desorbed, the nitrogen enriched on the molecular sieve 102 increases the air pressure in the separation tower 101, and the nitrogen flows out of the exhaust port and enters the negative pressure chamber 201 through the pipe 1, then flows through the ventilation duct 2011 through the vent 2012, and finally flows out of the ventilation duct 2011 through the air outlet 2013 until the air pressure in the negative pressure chamber 201 in the separation tower 101 is balanced;

[0053] Subsequently, driven by the linkage device 3, the rack 203 moves outward, and the linkage rod 204 drives the baffle 205 to move outward synchronously. When the baffle 205 is located at the vent 2012, the air outlet 2013 is no longer connected to the vent 2012, and the internal space of the negative pressure chamber 201 inside the sliding plate 202 is closed; the rack 203 drives the sliding plate 202 to move outward, and the nitrogen is pumped into the negative pressure chamber 201, and the nitrogen pumped into the negative pressure chamber 201 flows out of the negative pressure chamber 201 through the one-way valve on the negative pressure chamber 201;

[0054] During the outward movement of the rack 203, the spring 1 206 is gradually compressed, the sliding shaft 2031 slides in the upper groove in the limiting groove 2091, the boss 2032 gradually separates from the clamping plate 207, and the spring 208 rebounds; when the sliding shaft 2031 slides to the outermost slope edge of the limiting groove 2091, under the guiding effect of the slope edge and the guide rod 2092 and the rebound effect of the spring 1 206, the sliding shaft 2031 slides to the lower groove under the limiting groove 2091; at the same time, the rack 203 rotates downward, and the rack 203 and the transmission gear 1 305 or the transmission gear 2 306 are connected. 07 is disengaged, and driven by the rebound effect of spring 1 206, the sliding plate 202, the rack 203 and the sliding shaft 2031 all slide inward; when the rack 203 passes the card plate 207, the boss 2032 gradually presses down the card plate 207, and the spring 208 is compressed; when the sliding shaft 2031 slides to the innermost end of the sliding groove of the limiting slide groove 2091, the boss 2032 has pressed down against the card plate 207, the rack 203 rotates to a horizontal state, and the sliding shaft 2031 returns to the initial position, and the sliding plate 202 and the baffle 205 also return to their original positions; as described above, a nitrogen desorption is completed.

[0055] Since the first adsorption and desorption section and the second adsorption and desorption section are used for the first separation and the second separation respectively, the amount of nitrogen required for desorption is different for the two times, and the first time is greater than the second time. Therefore, driven by the linkage device 3, the first adsorption and desorption section desorbs several times before the second adsorption and desorption section desorbs once.

[0056] The servo drive motor 301 is started, the worm 303 rotates, driving the worm wheel 303 to rotate, the worm wheel 303 drives the transmission shaft 304 to rotate, the transmission gear 305 on the transmission shaft 304 and the connecting plate 306 rotate synchronously; the transmission gear 305 drives the rack 203 of the first adsorption and desorption part to slide; the connecting plate 306 rotates to drive the counting plate 3061 to rotate, and each time the counting plate 3061 rotates once, the counting sensor 313 counts once; when the set count is reached, the cylinder 308 is started, and its telescopic end pushes the rotating disk 309, and the rotating disk 309 rotates. The disk 309 drives the clamping rod 310 to move, and the spring three 311 is compressed until the clamping rod 310 is inserted into the embedding hole 3062. At this time, the transmission gear two 307 rotates synchronously with the connecting disk 306. When the transmission shaft one 304 rotates next time, the transmission gear two 307 will also rotate synchronously, thereby driving the rack 203 of the second adsorption and desorption part to move, so that the second adsorption and desorption part desorbs nitrogen; after the desorption is completed, the telescopic end of the cylinder 308 retracts, the turntable 309 and the clamping rod 310 return to their original positions, and the spring three 311 is reset, waiting for the next desorption.

Claims

1. A two-pole series adsorption tower oxygen production equipment, characterized in that: The invention comprises a first adsorption and desorption section, a second adsorption and desorption section, a linkage device (3), a base (4) and a control end (5); the first adsorption and desorption section and the second adsorption and desorption section both comprise a nitrogen adsorption device (1) and a nitrogen desorption device (2); the nitrogen adsorption device (1) and the nitrogen desorption device (2) in the same section are connected via a pipeline 1, a one-way valve and a manual valve are provided on the pipeline 1, and gas flows from the nitrogen adsorption device (1) to the nitrogen desorption device (2) in a one-way direction; the nitrogen adsorption devices (1) in the first adsorption and desorption section and the second adsorption and desorption section are connected via a pipeline 2, a one-way valve and a manual valve are provided on the pipeline 2, and gas flows from the nitrogen adsorption device (1) in the first adsorption and desorption section to the nitrogen desorption device (2) in a one-way direction; The outlet flows into the inlet of the nitrogen adsorption device (1) in the second adsorption and desorption section in a unidirectional manner; the inlet of the nitrogen adsorption device (1) in the first adsorption and desorption section is connected to the pipeline three, and the compressed air enters the nitrogen adsorption device (1) in the first adsorption and desorption section through the pipeline three; the outlet of the nitrogen adsorption device (1) in the second adsorption and desorption section is connected to the oxygen tank through the pipeline four, and a one-way valve is provided on the pipeline four, and high-concentration oxygen enters the oxygen tank through the pipeline four; the nitrogen desorption devices (2) in the first adsorption and desorption section and the second adsorption and desorption section are both installed on the base (4) and are synchronously driven by the linkage device (3); the control end (5) is used to control the operation of the entire two-pole series adsorption tower oxygen production equipment; Each nitrogen adsorption device (1) comprises a separation tower (101), a molecular sieve (102) and a rotating assembly (103); the separation tower (101) is vertically installed on the ground, the separation tower (101) is connected to the corresponding nitrogen desorption device (2) through a pipeline 1, and the separation tower (101) in the first adsorption and desorption section and the second adsorption and desorption section are connected through a pipeline 2; the interior of the molecular sieve (102) is divided into a main area (1021) and a spare area (1022), and the molecular sieve (102) is rotatably installed inside the separation tower (101) and driven to rotate by the rotating assembly (103); an airtight partition is provided between the main area (1021) and the spare area (1022); the main area (1021) and the spare area (1022) of the molecular sieve (102) in the first adsorption and desorption section are alternately connected to the pipeline 2, and the main area (1021) and the spare area (1022) of the molecular sieve (102) in the second adsorption and desorption section are alternately connected to the pipeline 4; Each of the nitrogen desorption devices (2) comprises a negative pressure chamber (201), a sliding plate (202), a baffle (205) and a driving mechanism; the negative pressure chamber (201) is fixedly mounted on a base (4); the sliding plate (202) is slidably mounted in the negative pressure chamber (201) and divides the internal space of the negative pressure chamber (201) into two parts, an inner part and an outer part, during the sliding process; the innermost end of the negative pressure chamber (201) is connected to the separation tower (101) via a pipe 1; a ventilation duct (2011) parallel to the sliding direction of the sliding plate (202) is provided on the right side wall of the negative pressure chamber (201); The innermost end of the ventilation duct (2011) is provided with a vent (212), and is connected to the internal space of the negative pressure chamber (201) through the vent (212); the outermost end of the ventilation duct (2011) is provided with an air outlet (213); the baffle (205) is slidably mounted in the ventilation duct (2011), and when the baffle (205) slides outside the vent (212), the inner end of the ventilation duct (2011) can be closed; the driving mechanism is used to drive the sliding plate (202) and the baffle (205) to slide; and the negative pressure chamber (201) is provided with a one-way valve for exhausting air outwards.

2. The two-pole series adsorption tower oxygen production equipment according to claim 1, characterized in that: The rotating assembly (103) comprises a rotating motor (1031), a rotating gear 1 (1032), a rotating gear 2 (1033) and a rotating shaft (1034); the rotating shaft (1034) is coaxially fixedly connected to the molecular sieve (102) and rotatably mounted in the separation tower (101); the rotating motor (1031) is fixedly mounted on the outer wall of the separation tower (101), and its output end is coaxially fixedly connected to the rotating gear 1 (1032); the rotating gear 2 (1033) is coaxially fixedly mounted on the rotating shaft (1034); the rotating gear 1 (1032) is meshed with the rotating gear 2 (1033).

3. The two-pole series adsorption tower oxygen production equipment according to claim 1, characterized in that: The driving mechanism comprises a rack (203), a connecting rod (204), a spring 1 (206), a clamping plate (207), a spring 2 (208) and a slide slot frame (209); the sliding plate (202) is elastically connected to the outermost end of the negative pressure chamber (201) via a plurality of spring 1s (206); the slide slot frame (209) is located outside the negative pressure chamber (201) and is fixedly mounted on the base (4); a limiting slide slot (2091) is provided on the slide slot frame (209), and a guide rod (2092) is fixedly mounted inside the guide slot frame (209). The innermost end of the rack (203) is hinged on the sliding plate (202), and the outermost end is provided with a sliding shaft (2031), which is slidably installed in the limiting sliding groove (2091) and slides along the edge of the guide rod (2092); one end of the connecting rod (204) is fixedly installed on the rack (203), and the other end is hinged to the baffle (205); the clamping plate (207) is arranged below the rack (203) and is elastically connected to the inner wall of the negative pressure chamber (201) through a second spring (208); A boss (2032) is provided in the middle of the bottom end of the rack (203), the boss (2032) protrudes downward and intermittently contacts the clamping plate (207), and the innermost end of the boss (2032) gradually rises and transitions toward the inner end of the rack (203); the limiting slide groove (2091) is a closed slide groove arranged around the guide rod (2092) as a whole, and the upper corner of the limiting slide groove (2091) at the outermost end is a sloped edge that tilts downward from the inside to the outside, and the outermost end of the guide rod (2092) is a slope that tilts downward from the outside to the inside.

4. The two-pole series adsorption tower oxygen production equipment according to claim 3, characterized in that: The linkage device (3) comprises a servo drive motor (301), a worm (302), a worm wheel (303), a transmission shaft 1 (304), a transmission gear 1 (305), a connecting plate (306), a transmission gear 2 (307), a cylinder (308), a rotating plate (309), a clamping rod (310), a spring 3 (311), a transmission shaft 2 (312) and a counting sensor (313); the servo drive motor (301) is fixedly mounted on the base (4), and its telescopic end is coaxially fixedly connected to the worm (302); the worm (302) is rotatably mounted on the base The first transmission shaft (304) is rotatably mounted on the base (4); the worm wheel (303), the first transmission gear (305), and the connecting plate (306) are all coaxially fixedly mounted on the first transmission shaft (304); the worm wheel (303) is meshed with the worm (302); the first transmission gear (305) is intermittently meshed with the rack (203) of the first adsorption and desorption section; a counting plate (3061) is fixedly mounted on the side wall of the connecting plate (306); an embedding hole (3062) is eccentrically provided inside the connecting plate (306); the second transmission shaft (312) The second transmission gear (307) is coaxially fixedly mounted on the second transmission shaft (312), and the turntable (309) is coaxially slidably mounted on the second transmission shaft (312); the second transmission gear (307) is intermittently meshed with the rack (203) of the second adsorption and desorption section; the cylinder (308) is fixedly mounted on the base (4), and its telescopic end is parallel to the second transmission shaft (312) and is slidably connected to the turntable (309); the clamping rod (310) is parallel to the second transmission shaft (312). The left end of the clamping rod (310) is eccentrically fixedly mounted on the rotating disk (309), the rod body passes through the transmission gear 2 (307), and the right end cooperates with the embedding hole (3062) and is intermittently inserted into the embedding hole (3062); the spring 3 (311) is installed between the transmission gear 2 (307) and the rotating disk (309); the counting sensor (313) is fixedly mounted on the negative pressure chamber (201) of the second adsorption and desorption section, and counts the number of rotations of the counting plate (3061). The counting sensor (313) counts once for each rotation of the counting plate (3061).

5. The two-pole series adsorption tower oxygen production equipment according to any one of claims 1 to 4, characterized in that: Two groups of nitrogen adsorption devices (1) are respectively provided in the first adsorption and desorption section and the second adsorption and desorption section. The two groups of nitrogen adsorption devices (1) in the same section are connected in parallel. Pipeline 2 connects the nitrogen adsorption devices (1) in the first adsorption and desorption section and the second adsorption and desorption section that are connected in parallel in series.

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