Cryogenic air separation equipment with purification structure

Abstract

The utility model discloses deep cooling air separation equipment with a purification structure, which comprises a base, an air compressor, a pre-cooling device, a purification device, an expansion machine and a rectifying tower are sequentially arranged at the upper end of the base, the purification device comprises a first adsorption tower and a second adsorption tower, and the internal structures of the first adsorption tower and the second adsorption tower are the same. An air inlet distribution device is arranged at the upper ends of supporting side plates symmetrically arranged on the two sides of the lower end in the first adsorption tower, and a composite adsorbent is filled between filter screen plates symmetrically arranged above the air inlet distribution device. According to the copious cooling air separation equipment with the purification structure, the first adsorption tower and the second adsorption tower are matched for use, when the first adsorption tower reaches adsorption saturation, the second adsorption tower can be switched for adsorption, so that shutdown is not needed during use, the processing continuity is improved, meanwhile, a composite adsorbent is regenerated after being heated by the heating device, and the service life of the equipment is prolonged. The service life of the composite adsorbent is prolonged, the replacement frequency is reduced, and the operation cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related technical field of cryogenic air separation equipment, specifically to a cryogenic air separation equipment with purification structure. BACKGROUND

[0002] The cryogenic air separation equipment is a kind of equipment for separating air into oxygen, nitrogen and other gases by low-temperature separation technology, and is widely used in industrial production.However, there are moisture, carbon dioxide, hydrocarbons and other impurities in air, which will freeze under cryogenic conditions, block the equipment pipeline and heat exchanger, and affect the normal operation of the equipment and the quality of gas products.Therefore, air needs to be purified to remove these impurities.

[0003] The existing purification structure provided in the cryogenic air separation equipment is complicated to install and disassemble when in use, and the adsorbent provided inside has a short service life and needs to be frequently replaced, increasing the operating cost and maintenance workload.For the above problems, the existing equipment needs to be improved. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a cryogenic air separation equipment with purification structure to solve the problem of the existing purification structure provided in the cryogenic air separation equipment in the background art, which is complicated to install and disassemble when in use, and the adsorbent provided inside has a short service life and needs to be frequently replaced, increasing the operating cost and maintenance workload.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a cryogenic air separation equipment with purification structure, comprising a base,

[0006] The air compressor, pre-cooling device, purification device, expander and rectifying column are sequentially arranged on the upper end of the base, the purification device comprises a first adsorption tower and a second adsorption tower, and the internal structures of the first adsorption tower and the second adsorption tower are the same, the back of the first adsorption tower is detachably connected with a sealing plate, support side plates are symmetrically arranged on both sides of the lower end inside the first adsorption tower, an air inlet distribution device is arranged on the upper end between the support side plates, the lower end middle of the air inlet distribution device is connected with one end of the corresponding first conveying pipe, filter screen plates are symmetrically arranged above the air inlet distribution device, composite adsorbents are filled between the two filter screen plates, the top of the filter screen plate arranged on the upper end is provided with filter cloth, a gas collecting hopper is arranged on the upper end of the filter cloth, one end of the corresponding first exhaust pipe is connected with the gas collecting hopper on one side of the upper end, a heating device is arranged at the position of the composite adsorbents on the back side of the sealing plate, and electric heating wires provided in the heating device extend through the sealing plate and into the composite adsorbents inside.

[0007] Preferably, the air compressor is connected with one side of the pre-cooling device through a first connecting pipe, and a second connecting pipe arranged at the other side of the pre-cooling device is connected with one end of the first conveying pipe and the second conveying pipe through an electric three-way valve, and the first conveying pipe and the second conveying pipe are connected with the first adsorption tower and the second adsorption tower respectively.

[0008] Preferably, the first exhaust pipe and the second exhaust pipe connected with the first adsorption tower and the second adsorption tower respectively are connected with two connecting ports of a three-way connecting head, and a one-way valve is arranged on each of the first exhaust pipe and the second exhaust pipe, and the other connecting port of the three-way connecting head is connected with the expander through a third connecting pipe.

[0009] Preferably, the composite adsorbent is mixed by active alumina and molecular sieve according to a specific ratio.

[0010] Preferably, the expander is connected with the rectifying tower through a fourth connecting pipe, and a quantitative suction pump is arranged on the fourth connecting pipe, one side of the rectifying tower is provided with an oxygen discharge pipe, and a nitrogen discharge pipe is arranged at the top of the rectifying tower.

[0011] Compared with the prior art, the deep cooling air separation equipment with the purification structure has the advantages that,

[0012] In order to solve the problem that the purification structure arranged in the existing deep cooling air separation equipment is complicated to install and dismount, the service life of the adsorbent arranged inside is short, the adsorbent needs to be frequently replaced, and the operation cost and the maintenance workload are increased, the composite adsorbent is adopted to improve the adsorption capacity and the adsorption efficiency of impurities in air, and the first adsorption tower and the second adsorption tower are used in combination, so that when the first adsorption tower reaches adsorption saturation, the second adsorption tower can be switched to adsorb, so that the processing continuity is improved, and the service life of the composite adsorbent is prolonged, the frequency of replacement is reduced, and the operation cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a front view structural schematic diagram of the utility model;

[0014] Figure 2 It is a front view sectional structure schematic diagram of the first adsorption tower of the utility model;

[0015] Figure 3 It is a rear view structure schematic diagram of the first adsorption tower of the utility model;

[0016] Figure 4 It is a rear view structure schematic diagram of the utility model.

[0017] In the figure: 1, base; 2, air compressor; 3, first connecting pipe; 4, pre-cooling device; 5, second connecting pipe; 6, electric three-way valve; 7, first conveying pipe; 8, first adsorption tower; 801, sealing plate; 802, support side plate; 803, air inlet distribution device; 804, filter screen plate; 805, composite adsorbent; 806, filter cloth; 807, gas collecting hopper; 808, heating device; 9, first exhaust pipe; 10, second conveying pipe; 11, second adsorption tower; 12, second exhaust pipe; 13, three-way connector; 14, third connecting pipe; 15, expander; 16, fourth connecting pipe; 17, quantitative suction pump; 18, rectifying tower; 19, oxygen discharge pipe; 20, nitrogen discharge pipe. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] Please refer to Figures 1-4 The present application provides a technical solution: a cryogenic air separation equipment with a purification structure, according to Figure 1 and Figure 4As shown, the base 1 upper end is provided with air compressor 2, pre-cooling device 4, purification device, expander 15 and rectifying column 18, air compressor 2 through the first connecting pipe 3 and pre-cooling device 4 side connection, air compressor 2 is prior art, through the air compressor 2 will be outside air through multi-stage compression, so that the air pressure rises, and pre-cooling device 4 another side of the second connecting pipe 5 through the electric three-way valve 6 and the first conveying pipe 7 and second conveying pipe 10 one end connection, pre-cooling device 4 is prior art, through the pre-cooling device 4 will be compressed air and low temperature water heat exchange, preliminary reduce air temperature, reduce the load of subsequent purification device and expander 15, while the first conveying pipe 7 and second conveying pipe 10 are respectively connected with the first adsorption tower 8 and the second adsorption tower 11 front lower end intermediate connection, the first adsorption tower 8 and the second adsorption tower 11 are respectively connected with the first exhaust pipe 9 and the second exhaust pipe 12 and the three-way connector 13 upper two connection ports, and the first exhaust pipe 9 and the second exhaust pipe 12 are provided with a check valve, by setting the first adsorption tower 8 and the second adsorption tower 11 are used in conjunction with, it is convenient to select the first adsorption tower 8 or the second adsorption tower 11 according to the use condition to carry out purification processing, so that the first adsorption tower 8 is saturated and stopped working, and the second adsorption tower 11 is replaced to work, so that the work has continuity, when the second adsorption tower 11 works, the composite adsorbent 805 arranged in the first adsorption tower 8 is regenerated, and the other connection port of the three-way connector 13 is connected with the expander 15 through the third connecting pipe 14, the expander 15 is connected with the rectifying column 18 through the fourth connecting pipe 16, and the fourth connecting pipe 16 is provided with a quantitative suction pump 17, one side of the rectifying column 18 is provided with an oxygen discharge pipe 19, and the top of the rectifying column 18 is provided with a nitrogen discharge pipe 20.

[0020] According to Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the purification device includes a first adsorption tower 8 and a second adsorption tower 11, and the internal structures of the first adsorption tower 8 and the second adsorption tower 11 are the same, a sealing plate 801 is detachably connected to the back of the first adsorption tower 8, and support side plates 802 are symmetrically arranged at both sides of the lower end inside the first adsorption tower 8, and an air inlet distribution device 803 is arranged at the upper end between the support side plates 802, the air inlet distribution device 803 includes a main pipe and a plurality of air outlet branch pipes, the air entering the inside of the adsorption tower is uniformly distributed through the air inlet distribution device 803, the adsorption efficiency is improved, one end of the air inlet distribution device 803 is connected with one end of the corresponding first conveying pipe 7 at the lower end, and filter screen plates 804 are symmetrically arranged above the air inlet distribution device 803, and composite adsorbents 805 are filled between the two filter screen plates 804, the composite adsorbents 805 are mixed by active alumina and molecular sieves according to a specific ratio, and the moisture, carbon dioxide and hydrocarbons and other impurities in the air are adsorbed through the composite adsorbents 805, filter cloths 806 are arranged on the top of the filter screen plates 804 arranged at the upper end, the filter cloths 806 prevent the particles of the composite adsorbents 805 from being taken out, gas collecting hoppers 807 are arranged at the upper end of the filter cloths 806, and one end of the first exhaust pipe 9 is connected with one end of the corresponding gas collecting hopper 807 at one side of the upper end of the gas collecting hopper 807, the purified air can be quickly collected and discharged through the gas collecting hoppers 807, heating devices 808 are arranged at the position of the composite adsorbents 805 at the rear side of the sealing plate 801, and electric heating wires arranged in the heating devices 808 extend through the sealing plate 801 to the inside of the composite adsorbents 805, the saturated composite adsorbents 805 are heated through the heating devices 808, the substances adsorbed in the composite adsorbents 805 are desorbed or thermally decomposed from the adsorbents, the composite adsorbents 805 are regenerated and utilized, the resource utilization rate is improved, the replacement frequency is reduced, and the operation cost is reduced.

[0021] The terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only a simplified description for the convenience of describing the utility model, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the protection scope of the utility model.

[0022] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A deep cooling air separation equipment with purification structure, comprising a base (1), characterized in that: the upper end of the base (1) is sequentially provided with an air compressor (2), a pre-cooling device (4), a purification device, an expander (15) and a rectifying tower (18), the purification device comprises a first adsorption tower (8) and a second adsorption tower (11), and the internal structures of the first adsorption tower (8) and the second adsorption tower (11) are the same, the back of the first adsorption tower (8) is detachably connected with a sealing plate (801), and the lower end of the inside of the first adsorption tower (8) is symmetrically provided with support side plates (802), and the upper end between the support side plates (802) is provided with an air inlet distribution device (803), the lower end of the air inlet distribution device (803) is connected with one end of a corresponding first conveying pipe (7), the upper part of the air inlet distribution device (803) is symmetrically provided with filter screen plates (804), the two filter screen plates (804) are filled with a composite adsorbent (805), the top of the filter screen plate (804) provided at the upper end is provided with a filter cloth (806), the upper end of the filter cloth (806) is provided with a gas collecting hopper (807), one side of the upper end of the gas collecting hopper (807) is connected with one end of a corresponding first exhaust pipe (9), the rear side of the sealing plate (801) is provided with a heating device (808) at the position of the composite adsorbent (805), and the electric heating wire provided in the heating device (808) extends through the sealing plate (801) to the inside of the composite adsorbent (805).

2. The cryogenic air separation plant having a purified structure of claim 1, characterized in that: The air compressor (2) is connected with one side of the pre-cooling device (4) through a first connecting pipe (3), the other side of the pre-cooling device (4) is provided with a second connecting pipe (5) connected with one end of a first conveying pipe (7) and a second conveying pipe (10) through an electric three-way valve (6), and the first conveying pipe (7) and the second conveying pipe (10) are respectively connected with the front lower end of the first adsorption tower (8) and the second adsorption tower (11).

3. The cryogenic air separation plant having a purified structure of claim 1, characterized in that: The first exhaust pipe (9) and the second exhaust pipe (12) connected with the first adsorption tower (8) and the second adsorption tower (11) are connected with two connection ports of a three-way connector (13), one-way valves are arranged on the first exhaust pipe (9) and the second exhaust pipe (12), and the other connection port of the three-way connector (13) is connected with the expander (15) through a third connecting pipe (14).

4. The cryogenic air separation plant having a purified structure of claim 1, characterized in that: The composite adsorbent (805) is mixed from activated alumina and molecular sieve.

5. The cryogenic air separation plant having a purified structure of claim 1, characterized by: The expander (15) is connected with the rectifying tower (18) through a fourth connecting pipe (16), a quantitative suction pump (17) is arranged on the fourth connecting pipe (16), one side of the rectifying tower (18) is provided with an oxygen discharge pipe (19), and the top of the rectifying tower (18) is provided with a nitrogen discharge pipe (20).

Images