Efficient and energy-saving liquid air cryogenic separation oxygen generator

Abstract

The utility model discloses an efficient energy-saving liquid air cryogenic separation oxygenerator, and relates to the technical field of oxygenerator equipment, the oxygenerator comprises a protective shell and a movable seat arranged below the protective shell, and also comprises a heat exchange liquefaction assembly, a rectification assembly and an air pretreatment assembly, the outer side of the protective shell is provided with a controller, and the controller is connected with the movable seat. A plurality of moving wheels are arranged at the bottom of the moving seat, and the protective shell and the moving seat are fastened through screws. Through the synergistic effect of the efficient multi-stage countercurrent heat exchanger and the energy-saving expansion machine, compared with a traditional oxygen generator, the energy consumption is greatly reduced, and the operation cost is reduced; due to the optimal design of the multi-stage countercurrent exchanger and the rectifying tower of the equipment, the heat exchange efficiency and the rectifying efficiency are greatly improved, and the yield and the purity of oxygen are improved compared with those of a traditional oxygen generator.

Description

TECHNICAL FIELD

[0001] The utility model relates to oxygen -making machine technical field, concretely is a kind of efficient energy -conserving liquid air cryogenic separation oxygen generator. BACKGROUND

[0002] In industrial production and medical and many other fields, the demand for oxygen is very extensive, and liquid air cryogenic separation oxygen is a common and important oxygen production method.

[0003] Traditional liquid air cryogenic separation oxygen generator energy consumption is higher, resulting in high operating cost;At the same time, the heat exchange efficiency is low, so that the air liquefaction and subsequent separation process is not efficient enough. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of efficient energy -conserving liquid air cryogenic separation oxygen generator, with the advantages of energy saving and high efficiency, to solve the problem of high energy consumption of existing equipment and low level heat exchange efficiency.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of efficient energy -conserving liquid air cryogenic separation oxygen generator, including protective housing and the mobile seat being located below the protective housing, further including heat exchange liquefaction component, rectification component, air pretreatment component, wherein:

[0006] The controller is arranged on the outer side of the protective housing, and the mobile seat is provided with a plurality of mobile wheels at the bottom, and the protective housing and the mobile seat are fixed by screws;

[0007] The heat exchange liquefaction component includes a multistage countercurrent heat exchanger, the multistage countercurrent heat exchanger includes a plurality of equally spaced cooling cavities, the multistage countercurrent heat exchanger is provided with a liquefier on one side, the liquefier is provided with an expander, and the expander is provided with an impeller inside.

[0008] The rectification component includes a rectification tower, a plurality of trays are arranged in the rectification tower, structured packing is arranged on the tray, the rectification tower is communicated with a reboiler on one side through a conduit, the reboiler is communicated with a gasifier at the bottom through a valve, and the gasifier is provided with a gas outlet pipe at the top.

[0009] As a preferred technical scheme of the utility model, the cooling cavity and the countercurrent cavity are arranged in a staggered manner, the cooling cavity is penetrated and communicated by an air pipe, and the countercurrent cavity is penetrated and communicated by a countercurrent pipe.

[0010] As a preferred technical scheme of the utility model, the radial position of the expander is communicated with the lower side of the impeller through a high-pressure pipe, the axial position of the expander is communicated with one side of the impeller through a cold gas pipe, and the other end of the cold gas pipe is communicated with the liquefier.

[0011] As an improved technical scheme of the utility model, the air pretreatment assembly comprises a filter, the filter is communicated with an adsorber at the bottom, and the adsorber is connected with an air compressor.

[0012] As an improved technical scheme of the utility model, the air compressor is connected with a cooling pipe above through a pipe, and the cooling pipe is a spiral structure and penetrates a cooling plate.

[0013] As an improved technical scheme of the utility model, the cooling pipe is communicated with an air pipe, the counterflow pipe is communicated with the top of a rectifying tower, and the bottom of the rectifying tower is communicated with a gasifier through a pipe.

[0014] As an improved technical scheme of the utility model, the tray is provided with a plurality of air holes, the regular fillers are abutted with overflow plates on both sides, and the bottom of the tray is connected with a downcomer.

[0015] Compared with the prior art, the utility model provides a kind of high-efficiency energy-saving liquid air cryogenic separation oxygen generator, with following beneficial effects: the utility model is through the synergistic effect of high-efficiency multistage counterflow heat exchanger and energy-saving expander, energy consumption is greatly reduced compared with traditional oxygen generator, and operating cost is reduced;The optimization design of the multistage counterflow exchanger and rectifying tower of the equipment makes that heat exchange efficiency and rectification efficiency are greatly improved, and the yield and purity of oxygen are improved compared with traditional oxygen generator. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is external structure schematic diagram of the utility model;

[0017] Figure 2 It is internal structure diagram of the utility model;

[0018] Figure 3 It is multistage counterflow heat exchanger structure schematic diagram of the utility model;

[0019] Figure 4 It is expander structure diagram of the utility model;

[0020] Figure 5 It is rectifying assembly structure schematic diagram of the utility model;

[0021] Figure 6 It is tray structure diagram of the utility model;

[0022] Figure 7 It is air pretreatment assembly structure diagram of the utility model.

[0023] In the figure: 1, protective shell; 2, moving seat; 11, controller; 21, moving wheel; 3, heat exchange liquefaction assembly; 31, multi-stage countercurrent heat exchanger; 311, cooling cavity; 312, countercurrent cavity; 313, air pipe; 314, countercurrent pipe; 32, liquefier; 33, expander; 331, impeller; 332, high-pressure pipe; 333, cold air pipe; 4, rectification assembly; 41, rectification column; 42, tray; 421, air hole; 422, overflow plate; 423, downcomer; 43, structured packing; 44, reboiler; 45, vaporizer; 46, gas outlet pipe; 5, air pretreatment assembly; 51, filter; 52, adsorber; 53, air compressor; 54, cooling pipe; 55, cooling plate. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model. Embodiment one

[0025] Please refer to Figures 1-7 The utility model discloses a kind of high-efficiency energy-saving liquid air cryogenic separation oxygen generator, including protective shell 1 and the moving seat 2 being arranged below protective shell 1, further include heat exchange liquefaction assembly 3, rectification assembly 4, air pretreatment assembly 5, wherein:

[0026] Controller 11 is equipped on the outside of protective shell 1, and the bottom of moving seat 2 is equipped with a plurality of moving wheels 21, and protective shell 1 is fixed with moving seat 2 by screw, specifically, the design of moving wheel 21 makes that oxygen generator can be more conveniently moved;

[0027] Please refer to the attached Figure 6 And the attached Figure 4 Heat exchange liquefaction assembly 3 includes multi-stage countercurrent heat exchanger 31, and multi-stage countercurrent heat exchanger 31 includes a plurality of equidistantly arranged cooling cavities 311, and one side of multi-stage countercurrent heat exchanger 31 is equipped with liquefier 32, and liquefier 32 is installed with expander 33, and expander 33 is equipped with impeller 331 inside, specifically, the design of impeller 331 makes that expander 33 can be more fully converted into mechanical energy when working The internal energy of gas produces more cold quantity, thereby reduce the energy consumption of liquefier 32;

[0028] Please refer to the attached Figure 5The rectification assembly 4 comprises a rectification tower 41, a plurality of tower plates 42 are arranged in the rectification tower 41, the tower plates 42 are provided with regular fillers 43, the rectification tower 41 is connected with a reboiler 44 through a pipeline, the reboiler 44 is connected with a gasifier 45 through a valve at the bottom, the gasifier 45 is provided with a gas outlet pipe 46 at the top, and the rectification tower 41 adopts the regular fillers 43 which have the characteristics of large specific surface area and high mass transfer efficiency compared with common bulk fillers, so that the gas-liquid two phases can be more fully contacted and mass transferred in the rectification tower, and the rectification efficiency is improved.

[0029] The cooling cavity 311 and the countercurrent cavity 312 are arranged in a staggered manner, the cooling cavity 311 is penetrated and communicated by an air pipe 313, and the countercurrent cavity 312 is penetrated and communicated by a countercurrent pipe 314.

[0030] In the embodiment, the pretreated air enters the cooling cavity 311 of the multi-stage countercurrent heat exchanger 31 from the air pipe 313 and exchanges heat with the cold air in the countercurrent cavity 312, in the heat exchange process, the sensible heat and latent heat of the air are fully recovered and utilized, and through multi-stage heat exchange, the heat exchange efficiency can be greatly improved, the air can reach a lower temperature when entering the rectification tower, the energy consumption of additional refrigeration is reduced, the air reaches a temperature close to liquefaction, and enters the liquefier 32 for further cooling and liquefaction, and the liquefier 32 utilizes the internal energy of the high-pressure air consumed by the expander 33 to further reduce the temperature of the air, thereby completing the liquefaction. Embodiment two

[0031] Based on the above embodiment 1, please refer to the attached Figure 6 and Figure 7 The radial position of the expander 33 is connected with the lower side of the impeller 331 through the high-pressure pipe 332, the axial position of the expander 33 is connected with one side of the impeller 331 through the cold air pipe 333, the other end of the cold air pipe 333 is connected with the liquefier 32, and specifically, the high-pressure air enters and drives the impeller 331 to rotate through the high-pressure pipe 332, so that the internal energy of the air is converted into mechanical energy, and then the temperature is reduced, and the cold air after the temperature reduction is re-input into the liquefier 32 through the cold air pipe 33 to liquefy the air in the liquefier 32.

[0032] The air pretreatment assembly 5 comprises a filter 51, the filter 51 is connected with an adsorber 52 at the bottom, and the adsorber 52 is connected with an air compressor 53, and specifically, the adsorber 52 adsorbs the moisture in the air, prevents the humid air from entering the machine to damage the machine, and improves the oxygen purity.

[0033] The air compressor 53 is connected with the cooling pipe 54 above through a pipeline, the cooling pipe 54 has a spiral structure and penetrates the cooling plate 55, and specifically, the cooling fan below the cooling pipe 54 cools the cooling pipe 54, the spiral structure makes the gas stay in the cooling pipe 54 for a longer time, and the cooling is more sufficient, and the cooling plate 55 further accelerates heat dissipation.

[0034] The cooling pipe 54 is communicated with the air pipe 313, the counterflow pipe 314 is communicated with the top of the rectifying tower 41, the bottom of the rectifying tower 41 is communicated with the gasifier 45 through a guide pipe, and specifically, the cold energy of the top of the rectifying tower 41 enters the cooling cavity 311 from the counterflow pipe 314.

[0035] The tray 42 is provided with a plurality of air holes 421, the regular fillers 43 are abutted with overflow plates 422 on both sides, and the bottom of the tray 42 is connected with a downcomer 423, and specifically, the air holes 421 facilitate the up-and-down flow of air in the tower, the oxygen with a high boiling point is liquefied on the regular fillers 43, and the excess liquid oxygen can overflow the overflow plates 422 and flow to the lower part from the downcomer 423, so that the excessive accumulation of liquid oxygen is prevented, and the air circulation is not affected.

[0036] In the embodiment, the filter 51 removes the particulate matters such as dust and impurities in the air, the adsorber 52 filters out the excess moisture, the filtered air enters the air compressor 53 for compression, the compressed air is heated, and then enters the cooling pipe 54 for heat dissipation, so as to prepare for the subsequent heat exchange and liquefaction process.

[0037] The working principle and use process of the utility model are as follows: when the equipment works, the external air first enters the filter 51, removes the particulate matters such as dust and impurities in the air, then enters the adsorber 52 to filter out the excess moisture, the filtered air enters the air compressor 53 for compression, the compressed air is heated, then enters the cooling pipe 54 for heat dissipation, so as to reach the appropriate temperature and pressure, and prepare for the subsequent heat exchange and liquefaction process.

[0038] The pretreated air enters the cooling cavity 311 of the multi-stage counterflow heat exchanger 31 from the air pipe 313, and the low-temperature backflow gas at the top of the rectifying tower 41 is input into the counterflow cavity 312 through the counterflow pipe 314, and the air in the cooling cavity 311 is gradually cooled through heat exchange with the counterflow cavity 312, in the heat exchange process, the sensible heat and latent heat of the air are fully recovered and utilized, after multi-stage heat exchange, the air reaches the temperature close to liquefaction, and then enters the liquefier 32 for further cooling and liquefaction.

[0039] The liquefier 32 utilizes the internal energy of the high-pressure air to consume the high-pressure air to further reduce the temperature of the air, so as to complete the liquefaction, then flows into the reboiler 44 through a guide pipe, the reboiler 44 heats and gasifies the liquid to enter the rectifying tower, and different components such as oxygen and nitrogen are separated according to the boiling point difference, the regular fillers 43 on the tray 42 make the gas-liquid two phases fully contact and mass transfer in the tower, so that the components such as oxygen and nitrogen are efficiently separated, high-purity nitrogen is obtained at the top of the rectifying tower 41, and high-purity liquid oxygen is obtained at the bottom.

[0040] Finally, the liquid oxygen is led out from the bottom of the rectifying tower 41, gasified into gaseous oxygen by the gasifier 45, and then led out of the protective shell 1 through the air outlet pipe 46 and delivered to the user end.

Claims

1. A high-efficiency and energy-saving liquid air cryogenic separation oxygen generator, comprising a protective shell (1) and a movable base (2) disposed below the protective shell (1), characterized in that, It also includes a heat exchange liquefaction assembly (3), a distillation assembly (4), and an air pretreatment assembly (5), wherein: The protective shell (1) is provided with a controller (11) on the outside, and the bottom of the movable base (2) is provided with several movable wheels (21). The protective shell (1) and the movable base (2) are fastened together by screws. The heat exchange liquefaction assembly (3) includes a multi-stage counter-current heat exchanger (31), which includes several equally spaced cooling chambers (311). A liquefaction unit (32) is provided on one side of the multi-stage counter-current heat exchanger (31), and an expander (33) is installed in the liquefaction unit (32). An impeller (331) is provided inside the expander (33). The distillation assembly (4) includes a distillation column (41), which has several trays (42) inside. The trays (42) are provided with structured packing (43). One side of the distillation column (41) is connected to a reboiler (44) through a conduit. The bottom of the reboiler (44) is connected to a vaporizer (45) through a valve. The top of the vaporizer (45) is provided with an outlet pipe (46).

2. The high-efficiency and energy-saving liquid air cryogenic separation oxygen generator according to claim 1, characterized in that: The cooling chamber (311) and the counterflow chamber (312) are fitted and staggered. The cooling chamber (311) is penetrated and connected by the air pipe (313), and the counterflow chamber (312) is penetrated and connected by the counterflow pipe (314).

3. The high-efficiency and energy-saving liquid air cryogenic separation oxygen generator according to claim 2, characterized in that: The radial position of the expander (33) is connected to the underside of the impeller (331) through the high-pressure pipe (332), and the axial position of the expander (33) is connected to one side of the impeller (331) through the cold air pipe (333). The other end of the cold air pipe (333) is connected to the liquefier (32).

4. The high-efficiency and energy-saving liquid air cryogenic separation oxygen generator according to claim 3, characterized in that: The air pretreatment assembly (5) includes a filter (51) with its bottom connected to an adsorber (52) and the adsorber (52) connected to an air compressor (53).

5. The high-efficiency and energy-saving liquid air cryogenic separation oxygen generator according to claim 4, characterized in that: The air compressor (53) is connected to the cooling pipe (54) above via a conduit. The cooling pipe (54) has a spiral structure and penetrates the cooling plate (55).

6. The high-efficiency and energy-saving liquid air cryogenic separation oxygen generator according to claim 5, characterized in that: The cooling pipe (54) is connected to the air pipe (313), the counterflow pipe (314) is connected to the top of the distillation column (41), and the bottom of the distillation column (41) is connected to the vaporizer (45) through a conduit.

7. The high-efficiency and energy-saving liquid air cryogenic separation oxygen generator according to claim 1, characterized in that: The tray (42) is provided with a number of pores (421), the structured packing (43) abuts against the overflow plate (422) on both sides, and the bottom of the tray (42) is connected to the downcomer (423).

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