Emptying and purging anti-blocking device for air separation liquid storage tank

Abstract

The utility model relates to the technical field of low-temperature storage, in particular to an emptying and purging anti-blocking device for an air separation liquid storage tank. According to the technical scheme, the device comprises a storage tank, a coil pipe, a sweeping and blowing head and a molecular sieve assembly, a base plate is arranged on the lower portion of the storage tank, the molecular sieve assembly is arranged on the upper surface of the base plate, a connector is installed at the top end of the storage tank, a blow-down pipe body is fixed to the connector, and the coil pipe is wound around the outer wall of the blow-down pipe body. A sweeping and blowing head is fixed at one end of the coil pipe, a connecting pipe is arranged at the other end of the coil pipe, and the connecting pipe is communicated with the top output end of the molecular sieve assembly. According to the utility model, the emptying pipeline of the storage tank is purged and reheated by virtue of the self gas temperature through the matching of the structures, so that icing is reduced, and accidents caused by pipeline blockage due to ice block accumulation are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature storage, in particular to a venting, blowing and anti-blocking device for an air separation liquid storage tank. Background Art

[0002] In recent years, the cryogenic liquid market has become increasingly prosperous, and the sales of liquid oxygen, liquid argon, and liquid nitrogen have increased significantly. The production, storage, and transportation of cryogenic liquids are inseparable from thermal insulation storage tanks, which are installed and used in large quantities. Compared with vacuum tanks and spherical tanks, the advantages of large-scale atmospheric pressure cryogenic liquid storage tanks are that they have low storage pressure and are therefore safer. Cryogenic storage tanks are large-scale, occupy less space, and reduce storage costs. The storage tank has a simple structure and is easy to construct, which reduces construction costs.

[0003] A fullness measuring pipe and a tank emptying pipe for controlling the maximum liquid level of the liquid in the container are provided in the cryogenic liquid storage tank. In the prior art, the tank emptying pipe is provided at the top of the tank body of the cryogenic liquid storage tank. When the liquid reaches the critical position of the fullness measuring pipe mouth, the cryogenic liquid will be continuously and safely released from the tank emptying pipe to stabilize the pressure due to the need to ensure the complete stability of the internal pressure of the storage tank.

[0004] Due to the deep cold characteristics of cryogenic liquid, the cryogenic liquid in the storage tank vent pipe exposed to the external environment will continuously absorb heat from the external environment and freeze. The ice will block the vent pipe, which will cause the pressure in the container to increase and may cause an explosion risk.

[0005] For this reason, we propose an air separation liquid storage tank venting, purge and anti-blocking device to solve the existing problems. Utility Model Content

[0006] The utility model aims to solve the problems existing in the background technology and proposes an air separation liquid storage tank venting, blowing and anti-blocking device.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an air separation liquid storage tank venting and purge anti-blocking device, comprising a storage tank, a coil, a purge head and a molecular sieve assembly, wherein a base plate is provided at the lower portion of the storage tank, a molecular sieve assembly is provided on the upper surface of the base plate, a connector is installed at the top of the storage tank, a venting pipe body is fixed on the connector, a coil is wound around the outer wall of the venting pipe body, a purge head is fixed at one end of the coil, a connecting pipe is provided at the other end of the coil, and the connecting pipe is communicated with the top output end of the molecular sieve assembly.

[0008] Preferably, the lower surface of the storage tank is symmetrically provided with legs;

[0009] A base plate is fixed to the lower end of the outer wall of one of the legs, and a molecular sieve assembly is installed on the upper surface of the base plate by bolts;

[0010] The side wall input end of the molecular sieve component is connected with an air inlet.

[0011] Preferably, the sweeping and blowing head is designed to be U-shaped inside the coil;

[0012] The blowing direction of the purge head is consistent with the exhaust direction of the vent pipe body;

[0013] The coil and the sweep and blowing head are both made of copper tubes.

[0014] Preferably, a discharge nozzle is installed at one end of the storage tank, and a sealing cover is provided at the opening of the discharge nozzle.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] During the use of the utility model air separation liquid storage tank venting purge anti-blocking device, low-temperature liquid is stored in the storage tank. When the liquid reaches the critical position of the full pipe mouth, the low-temperature liquid is continuously and safely discharged from the storage tank venting pipeline to stabilize the pressure. Dry air filtered after molecular sieve is used as purge gas. The water content in the purge gas is extremely low, which can ensure that it will not freeze in a low-temperature environment. The gas temperature itself can be used to purge and reheat the storage tank venting pipeline, reduce ice formation, and prevent ice accumulation from clogging the pipeline and causing accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 3 This is a schematic diagram of the coil installation structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the main structure of the utility model.

[0021] Reference numerals:

[0022] 1. Support legs; 2. Discharge nozzle; 3. Storage tank; 4. Connector; 5. Vent pipe body; 6. Connecting pipe; 7. Coil; 8. Purge head; 9. Base plate; 10. Molecular sieve assembly; 11. Air inlet. DETAILED DESCRIPTION

[0023] 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.

[0024] Embodiment 1

[0025] like Figure 1-Figure 4 As shown, the utility model proposes an air separation liquid storage tank venting and purge anti-blocking device, comprising a storage tank 3, a coil 7, a purge head 8 and a molecular sieve assembly 10. A base plate 9 is provided at the lower portion of the storage tank 3, and a molecular sieve assembly 10 is provided on the upper surface of the base plate 9. A connector 4 is installed at the top of the storage tank 3, and a venting pipe body 5 is fixed on the connector 4. The outer wall of the venting pipe body 5 is wrapped with a coil 7, and a purge head 8 is fixed at one end of the coil 7. A connecting pipe 6 is provided at the other end of the coil 7, and the connecting pipe 6 is connected to the top output end of the molecular sieve assembly 10.

[0026] Based on Example 1:

[0027] The device is applied to an air separation liquid storage tank;

[0028] At this time, the air filtered and dried by the molecular sieve is guided to the venting pipe. The dried air has very little water content, which can ensure that it will not freeze in a low-temperature environment. It can also use its own gas temperature to purge and reheat the storage tank venting pipe, reduce ice formation, and prevent ice accumulation from clogging the pipe and causing accidents.

[0029] The purge pipe is designed to be made of copper pipe, which is coiled around the vent pipe. The copper pipe has strong thermal conductivity and can effectively reheat the tank vent pipe and reduce ice formation.

[0030] Bend the pipe extending from the outlet of the vent pipe so that the purge direction of the purge pipe is consistent with the gas outlet direction of the vent pipe;

[0031] The purge system needs to be manually activated. Under normal production conditions, the air will enter the purge pipe after the molecular sieve is dried, and then enter the vent pipe along the pipe to purge the vent pipe to reduce ice formation. This ensures that the venting operation at the top of the air separation liquid storage tank is safe and reliable, and reduces the incidence of accidents.

[0032] Embodiment 2

[0033] like Figure 1-Figure 4 As shown, the utility model proposes an air separation liquid storage tank venting, purging and anti-blocking device. Compared with the first embodiment, this embodiment also includes:

[0034] The lower surface of the storage tank 3 is symmetrically mounted with legs 1;

[0035] A base plate 9 is fixed to the lower end of the outer wall of one leg 1, and a molecular sieve assembly 10 is installed on the upper surface of the base plate 9 by bolts;

[0036] The side wall input end of the molecular sieve assembly 10 is connected to an air inlet 11. When working, outside air enters the molecular sieve through the air inlet 11 under the delivery of the compressor. The molecular sieve filters and dries the moisture in the air, and the filtered and dried air enters the coil 7.

[0037] The sweeping and blowing head 8 is designed to be U-shaped inside the coil 7;

[0038] The blowing direction of the blowing head 8 is consistent with the exhaust direction of the vent pipe body 5;

[0039] The air will enter the purge pipe, and then enter the vent pipe along the pipe to purge the vent pipe and reduce ice formation.

[0040] The coil 7 and the sweeping and blowing head 8 are both made of copper tubes;

[0041] The coil 7 is wound around the vent pipe. The copper pipe has strong thermal conductivity and can effectively reheat the vent pipe and reduce icing.

[0042] A discharge nozzle 2 is installed at one end of the storage tank 3, and a sealing cover is provided at the opening of the discharge nozzle 2.

[0043] It should be noted that the structure of the molecular sieve component 10 is an existing mature technology, and its working principle and internal structure are known to technicians in the relevant technical field. The present invention only utilizes its function and does not improve its internal structure. Therefore, it will not be described in detail here, and technicians in this field can make any selection according to their needs or convenience.

[0044] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

[0045] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An air separation liquid storage tank venting, purge and anti-blocking device, comprising a storage tank (3), a coil (7), a purge head (8) and a molecular sieve assembly (10), characterized in that: A base plate (9) is provided at the bottom of the storage tank (3), a molecular sieve assembly (10) is provided on the upper surface of the base plate (9), a connector (4) is installed at the top of the storage tank (3), a venting pipe body (5) is fixed on the connector (4), a coil (7) is wound around the outer wall of the venting pipe body (5), a purge head (8) is fixed at one end of the coil (7), a connecting pipe (6) is provided at the other end of the coil (7), and the connecting pipe (6) is interconnected with the top output end of the molecular sieve assembly (10).

2. The device for venting, purging and preventing blockage of an air separation liquid storage tank according to claim 1, characterized in that: The lower surface of the storage tank (3) is symmetrically provided with supporting legs (1); A base plate (9) is fixed to the lower end of the outer wall of one of the legs (1), and a molecular sieve assembly (10) is mounted on the upper surface of the base plate (9) via bolts; The side wall input end of the molecular sieve component (10) is connected to an air inlet (11).

3. The device for venting, purging and preventing blockage of an air separation liquid storage tank according to claim 1, characterized in that: The sweeping and blowing head (8) is designed to be U-shaped inside the coil (7); The blowing direction of the blowing head (8) is consistent with the exhaust direction of the venting pipe body (5); The coil (7) and the sweep and blow head (8) are both made of copper tubes.

4. The device for venting, purging and preventing blockage of an air separation liquid storage tank according to claim 1, characterized in that: A discharge nozzle (2) is installed at one end of the storage tank (3), and a sealing cover is provided at the opening of the discharge nozzle (2).

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