Equipment for preparing high-purity oxygen from liquid oxygen
By designing a liquid oxygen production high-purity oxygen equipment including heat exchanger, catalytic tower, cooler, adsorption tower and distillation tower, the problem of insufficient supply of high-purity oxygen due to complex structure and long production cycle of existing air separation equipment is solved, and effective production and continuous production of high-purity oxygen are achieved.
Patent Information
- Application Number
- CN202420270067.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-04
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-02-04
AI Technical Summary
The existing air-dividing equipment has complex structure and long production cycle when preparing high-purity oxygen, resulting in insufficient supply of high-purity oxygen.
A liquid oxygen production high-purity oxygen equipment is designed, including heat exchangers, catalytic towers, coolers, adsorption towers and distillation towers. Through the continuous operation of these equipment, the production of high-purity oxygen is achieved.
The equipment is simple in structure, convenient in operation, short delivery cycle and small investment. It only requires continuous liquid oxygen to meet the continuous production of the process, solving the problem of insufficient supply of high-purity oxygen.
Smart Images
Figure CN222560431U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of oxygen production equipment, in particular to equipment for producing high-purity oxygen from liquid oxygen. Background Art
[0002] High-purity oxygen is generally produced by air separation and is widely used in the electronics and polysilicon industries.
[0003] In the current existing technology, high-purity oxygen gas is a special high-purity gas used in the electronics industry. It is generally prepared by air separation equipment. The air separation equipment uses air as raw material and converts the air into liquid through a compression cycle and deep freezing method. Then, it is gradually separated and produced into inert gases such as oxygen, nitrogen and argon from the liquid air through distillation.
[0004] When in use, enterprises generally use air separation equipment to prepare high-purity oxygen in large quantities. Due to the rapid development of the electronics industry and the polysilicon industry, the supply of high-purity oxygen has shown a trend of being in short supply. However, the structure of air separation equipment is relatively complex and the production cycle is relatively long. Therefore, in response to the above problems, a liquid oxygen production high-purity oxygen equipment is proposed. Utility Model Content
[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background technology, the utility model provides a device for producing high-purity oxygen from liquid oxygen.
[0006] The technical solution adopted by the utility model to solve the technical problem is: the liquid oxygen preparation high-purity oxygen equipment described in the utility model includes a heat exchanger; the heat exchanger is connected with a catalytic tower, a cooler, an adsorption tower and a distillation tower in sequence; the pipeline between the adsorption tower and the distillation tower passes through the heat exchanger. Relying on the above arrangement, the structure of the equipment is relatively simple, the operation is convenient, it is not restricted by air separation equipment, the delivery cycle is relatively short, the overall investment of the equipment is relatively small, and continuous production of the process can be satisfied by continuously providing a certain amount of liquid oxygen.
[0007] Preferably, the adsorption tower includes a tower body; an air inlet pipe is fixedly connected to the bottom of the tower body; an air outlet pipe is fixedly connected to the top of the tower body; cover plates are fixedly connected to the inner walls of the top and bottom of the tower body; a plurality of uniformly distributed tubes are fixedly connected to the top of the air inlet pipe; the plurality of uniformly distributed tubes are arranged in a surrounding array, and when air is taken in, the airflow will pass through the plurality of uniformly distributed tubes at the bottom, so as to achieve a uniform distribution effect, thereby reducing the situation where the concentrated flow of oxygen affects the adsorption effect.
[0008] Preferably, a plurality of baffles are fixedly connected to the inner wall of the tower body; through grooves are formed on the plurality of baffles; the plurality of baffles are staggered, and by arranging the plurality of baffles, the oxygen can flow in an S shape in the tower body, thereby increasing the flow distance of the oxygen in the tower body, thereby improving the reduction of the situation where the adsorption effect is poor due to excessive oxygen flow rate, thereby ensuring the effect of oxygen removal.
[0009] Preferably, a motor is fixedly connected to the top of the tower body; a screw is fixedly connected to the output end of the motor; the screw passes through the baffle and is rotatably connected thereto; a fixing seat is threadedly connected to the screw; clamping plates are hinged on both sides of the fixing seat; and a torsion spring is installed at the hinge of the clamping plate.
[0010] Preferably, a groove is provided on the side of the clamping plate; a stopper is fixedly connected to the inner wall of the tower body at a position corresponding to the groove; a guide rod is fixedly connected to the top of the fixing seat; and the guide rod passes through the baffle and is slidably connected thereto.
[0011] Preferably, an elastic convex cover is fixedly connected to the bottom of the clamping plate; the elastic convex cover is designed in a mesh structure.
[0012] The utility model is beneficial in that:
[0013] 1. The utility model is provided with a heat exchanger, a catalytic tower, a cooler, an adsorption tower and a distillation tower. When in use, the heat exchanger is used to recycle the cold of industrial liquid oxygen, and then the catalytic tower is used to carry out hydrocarbon catalytic reaction on the reheated industrial gaseous oxygen, so that the hydrocarbon generates water and carbon dioxide, and the adsorption tower drying system is used to remove water and carbon dioxide to reduce the impurity content in the oxygen. The adsorption tower is filled with molecular sieve fillers, and the dried industrial oxygen enters the distillation tower for distillation operation. The volatile component medium is discharged at the top of the distillation tower, and high-purity oxygen is obtained at the bottom of the distillation tower as a product. The structure of the equipment is relatively simple, the operation is convenient, it is not limited by air separation equipment, the delivery cycle is relatively short, the overall equipment investment is relatively small, and only a certain amount of liquid oxygen needs to be continuously provided to meet the continuous production of the process;
[0014] 2. The utility model sets baffles and multiple baffles 31 to make the oxygen flow in the tower body 21 in an S shape, thereby increasing the flow distance of the oxygen in the tower body 21, thereby improving and reducing the situation where the adsorption effect is poor due to excessive oxygen flow rate, thereby ensuring the effect of oxygen removal. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 It is a structural schematic diagram of the utility model;
[0017] Figure 2 It is a schematic diagram of the tower structure of the utility model;
[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the tower body of the utility model;
[0019] Figure 4 It is a structural schematic diagram of the uniformly distributed orifice plate of the utility model.
[0020] In the figure: 1. adsorption tower; 2. cooler; 3. catalytic tower; 4. heat exchanger; 5. distillation tower; 21. tower body; 22. air inlet pipe; 23. air outlet pipe; 24. cover plate; 25. uniformly distributed pipe; 31. baffle; 41. motor; 42. screw; 43. fixed seat; 44. pressing plate; 51. block; 52. groove; 53. guide rod; 6. elastic convex cover; 7. uniformly distributed orifice plate. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] Specific examples are given below.
[0023] See also Figure 1As shown, a high-purity oxygen production equipment of liquid oxygen includes a heat exchanger 4; the heat exchanger 4 is sequentially connected to a catalytic tower 3, a cooler 2, an adsorption tower 1 and a distillation tower 5; the pipeline between the adsorption tower 1 and the distillation tower 5 passes through the heat exchanger 4; when in use, the industrial liquid oxygen is firstly recovered and utilized by the heat exchanger 4, and then the reheated industrial gaseous oxygen is subjected to a hydrocarbon catalytic reaction by the catalytic tower 3, so that the hydrocarbons generate water and carbon dioxide, and the water and carbon dioxide are removed by the drying system of the adsorption tower 1 to reduce the impurity content in the oxygen, the adsorption tower 1 is filled with a molecular sieve filler, the dried industrial oxygen enters the distillation tower 5 for distillation operation, the volatile component medium is discharged at the top of the distillation tower 5, and the high-purity oxygen is obtained at the bottom of the distillation tower 5 as a product for delivery. The structure of the equipment is relatively simple, the operation is convenient, it is not limited by the air separation equipment, the delivery cycle is relatively short, the overall equipment investment is relatively small, and only a certain amount of liquid oxygen needs to be continuously provided to meet the continuous production of the process.
[0024] Further, such as Figure 2 As shown, the adsorption tower 1 includes a tower body 21; an air inlet pipe 22 is fixedly connected to the bottom of the tower body 21; an air outlet pipe 23 is fixedly connected to the top of the tower body 21; a cover plate 24 is fixedly connected to the inner side walls of the top and bottom of the tower body 21; a plurality of uniformly distributed tubes 25 are fixedly connected to the top of the air inlet pipe 22; the plurality of uniformly distributed tubes 25 are arranged in a surrounding array; when in use, oxygen enters from the air inlet pipe 22, and is discharged from the air outlet pipe 23 after impurity removal and adsorption, and the molecular sieve filler fills the space between the two cover plates 24, and the cover plate 24 is a porous structure. When air is taken in, the airflow will pass through the plurality of uniformly distributed tubes 25 at the bottom, so it can play a role of uniform distribution, thereby reducing the situation where the concentrated flow of oxygen affects the adsorption effect.
[0025] Further, such as Figure 3 As shown, a plurality of baffles 31 are fixedly connected to the inner wall of the tower body 21; through grooves are provided on the plurality of baffles 31; the plurality of baffles 31 are arranged in a staggered manner; when in use, the plurality of baffles 31 are arranged so that the oxygen flows in an S shape in the tower body 21, thereby increasing the flow distance of the oxygen in the tower body 21, thereby improving the reduction of the situation where the adsorption effect is poor due to excessive oxygen flow rate, thereby ensuring the effect of oxygen removal.
[0026] Further, such as Figure 3-4As shown, a motor 41 is fixedly connected to the top of the tower body 21; a screw 42 is fixedly connected to the output end of the motor 41; the screw 42 passes through the baffle 31 and is rotatably connected thereto; a fixing seat 43 is threadedly connected to the screw 42; clamping plates 44 are hinged on both sides of the fixing seat 43; a torsion spring is installed at the hinge of the clamping plate 44; when loading the molecular sieve filler, the clamping plate 44 is initially tilted, and the filler falls from the gap between the clamping plate 44 and the tower body 21, and then the staff starts the motor 41, the motor 41 drives the screw 42 to rotate, and the screw 42 drives multiple fixing seats 43 to move downward, and the molecular sieve filler is padded at the bottom of the clamping plate 44, and the downward movement of the fixing seat 43 will cause the clamping plate 44 to rotate and flatten, and then compress the molecular sieve material, so as to compress the molecular sieve filler and reduce the pulverization of the molecular sieve filler. The motor 41 is a servo motor.
[0027] Further, such as Figure 3 As shown, a groove 52 is provided on the side of the clamping plate 44; a stopper 51 is fixedly connected to the inner wall of the tower body 21 at a position corresponding to the groove 52; a guide rod 53 is fixedly connected to the top of the fixed seat 43; the guide rod 53 passes through the baffle 31 and is slidably connected thereto; when in use, the guide rod 53 slides with the baffle 31 to guide the movement of the fixed seat 43. When in use, the grooves 52 set on both sides can facilitate the falling of the molecular sieve filler. After the clamping plate 44 moves downward a certain distance, the groove 52 fits with the stopper 51 to seal the groove 52.
[0028] Further, such as Figure 4 As shown, an elastic convex cover 6 is fixed to the bottom of the clamping plate 44; the elastic convex cover 6 is designed in a mesh structure; when in use, the elastic convex cover 6 will squeeze the molecular sieve filler, and the elastic setting of the elastic convex cover 6 can play a certain role in dynamically adjusting the clamping force, thereby reducing the situation of excessive compression of the molecular sieve filler, and cooperate with multiple clamping plates 44 to play a role of multi-layer compression inside the molecular sieve, thereby reducing the situation of too low compression force of the molecular sieve filler located in the center of the tower body 21.
[0029] Further, such as Figure 3 As shown, a uniformly distributed perforated plate 7 is fixedly connected to the inner wall of the bottom of the tower body 21; the uniformly distributed perforated plate 7 is located at the bottom of the cover plate 24; when in use, the uniformly distributed perforated plate 7 can assist in uniformly distributing oxygen.
[0030] Working principle: when in use, firstly, the industrial liquid oxygen is recycled through the heat exchanger 4, and then the reheated industrial gaseous oxygen is subjected to hydrocarbon catalytic reaction through the catalytic tower 3, so that the hydrocarbon generates water and carbon dioxide, and the water and carbon dioxide are removed through the drying system of the adsorption tower 1 to reduce the impurity content in the oxygen. The adsorption tower 1 is filled with molecular sieve fillers, and the dried industrial oxygen enters the distillation tower 5 for distillation operation. The volatile component medium is discharged at the top of the distillation tower 5, and high-purity oxygen is obtained at the bottom of the distillation tower 5 as a product. The structure of this equipment is relatively simple, the operation is convenient, and it is not limited by the air separation equipment. The delivery week is short. The period is relatively short, and the overall investment in the equipment is relatively small. Only a certain amount of liquid oxygen needs to be continuously provided to meet the continuous production of the process. When in use, oxygen enters from the air inlet pipe 22, and is discharged from the air outlet pipe 23 after impurity removal and adsorption. The molecular sieve filler fills the space between the two cover plates 24. The cover plate 24 is a porous structure. When the air is inlet, the air flow will pass through the multiple uniformly distributed pipes 25 at the bottom, so that it can play a role of uniform distribution, thereby reducing the situation where the concentrated flow of oxygen affects the adsorption effect. By setting up multiple baffles 31, the oxygen flows in the tower body 21 in an S shape, thereby increasing the flow distance of the oxygen in the tower body 21, thereby In order to improve the situation where the oxygen flow rate is too fast and the adsorption effect is poor, the oxygen impurity removal effect is ensured. When the molecular sieve filler is loaded, the pressing plate 44 is initially tilted, and the filler falls from the gap between the pressing plate 44 and the tower body 21. Then the staff starts the motor 41, and the motor 41 drives the screw 42 to rotate. The screw 42 drives the multiple fixing seats 43 to move downward. The molecular sieve filler is padded at the bottom of the pressing plate 44. The downward movement of the fixing seat 43 causes the pressing plate 44 to rotate and flatten, and then compresses the molecular sieve material, thereby compressing the molecular sieve filler and reducing the pulverization of the molecular sieve filler. When in use, the guide rod 53 and the baffle 31 are Slide, thereby guiding the movement of the fixed seat 43. When in use, the grooves 52 set on both sides can facilitate the falling of the molecular sieve filler. After the clamping plate 44 moves downward a certain distance, the groove 52 fits with the block 51 to block the groove 52. The elastic convex cover 6 can squeeze the molecular sieve filler. Relying on the elastic setting of the elastic convex cover 6, it can play a certain role in dynamically adjusting the clamping force, thereby reducing the situation of excessive compression of the molecular sieve filler, and cooperate with multiple clamping plates 44 to play a role of multi-layer compression inside the molecular sieve, thereby reducing the situation of too low compression force of the molecular sieve filler located at the center of the tower body 21.
[0031] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.
Claims
1. A device for producing high-purity oxygen from liquid oxygen, characterized in that: The invention comprises a heat exchanger (4); the heat exchanger (4) is sequentially connected to a catalytic tower (3), a cooler (2), an adsorption tower (1) and a distillation tower (5); the pipeline between the adsorption tower (1) and the distillation tower (5) passes through the heat exchanger (4); The adsorption tower (1) comprises a tower body (21); an air inlet pipe (22) is fixedly connected to the bottom of the tower body (21); an air outlet pipe (23) is fixedly connected to the top of the tower body (21); a cover plate (24) is fixedly connected to the inner side walls of the top and bottom of the tower body (21); a plurality of evenly distributed pipes (25) are fixedly connected to the top of the air inlet pipe (22); the plurality of evenly distributed pipes (25) are arranged in a surrounding array; a motor (41) is fixedly connected to the top of the tower body (21). ; The output end of the motor (41) is fixedly connected with a screw rod (42); the screw rod (42) passes through the baffle plate (31) and is rotatably connected thereto; the screw rod (42) is connected with a fixing seat (43) by means of a thread; both sides of the fixing seat (43) are hinged with a clamping plate (44); a torsion spring is installed at the hinge of the clamping plate (44); the bottom of the clamping plate (44) is fixedly connected with an elastic convex cover (6); the elastic convex cover (6) is designed in a mesh structure.
2. The high purity oxygen production equipment of liquid oxygen according to claim 1, characterized in that: A plurality of baffles (31) are fixedly connected to the inner side wall of the tower body (21); through grooves are provided on the plurality of baffles (31); and the plurality of baffles (31) are arranged in a staggered manner.
3. The high purity oxygen production equipment of liquid oxygen according to claim 2, characterized in that: A groove (52) is formed on the side of the pressing plate (44); a stopper (51) is fixedly connected to a position on the inner wall of the tower body (21) corresponding to the groove (52); a guide rod (53) is fixedly connected to the top end of the fixing seat (43); and the guide rod (53) passes through the baffle plate (31) and is slidably connected thereto.