Multi-layer heat preservation structure of air separation cold box

Abstract

The utility model discloses a multi-layer heat preservation structure of an air separation cold box, which relates to the technical field of heat insulation equipment and comprises a cold insulation shell, the same cold medium conveying pipe fixedly penetrates through the left side and the right side of the surface of the cold insulation shell, pearlife is filled in the cold insulation shell, and a heat insulation layer is fixedly arranged on one side of the periphery of the inner wall of the cold insulation shell. An adsorption layer is fixedly installed on the inner side of the inner wall of the cold insulation shell, and mesh holes are evenly distributed in the left side and the right side of the inner surface of the cold insulation shell. Compared with an existing common air separation cold box multi-layer heat preservation structure, the air separation cold box multi-layer heat preservation structure can conduct sufficient cold preservation on cold air conveyed by the whole cold medium conveying pipe, can prevent pearlife from being affected with damp and affecting the normal cold preservation effect of the pearlife, and is simple in whole device structure, low in production cost and suitable for popularization and application. The device is more suitable for large-scale production and large-scale purchase and use, more convenient to use and more efficient and simpler to maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat insulation equipment, in particular to a multi -layer heat preservation structure of air separation cold box. BACKGROUND

[0002] In the low temperature gas (liquid nitrogen, liquid oxygen) delivery process, to prevent the absorption of external heat in the delivery pipeline resulting in exertion loss, usually need to arrange the delivery pipeline in the air separation cold box, can effectively block the low temperature gas and the outside heat exchange, play the cold -keeping effect.

[0003] Such as the disclosure of the document with the application number 201720572460.0, discloses a kind of air separation cold box cold insulation device, the utility model ensures that the nitrogen concentration of filling in cold insulation shell is consistent, avoid outside air to enter the inside of cold insulation shell makes pearl sand "damp" reduce heat insulation performance, with good application, but the device needs to fill liquid nitrogen in use, also need to monitor value, using sensing device, device needs to be maintained frequently, and also can improve production cost, it is also relatively inconvenient when using.

[0004] Therefore, in view of this, the existing structure is improved, and a multi -layer heat preservation structure of air separation cold box is provided. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of multi -layer heat preservation structure of air separation cold box, to solve the problems raised in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of multi -layer heat preservation structure of air separation cold box, including cold insulation shell, the surface of the cold insulation shell left and right sides is fixed and penetrates and is installed with same cold medium delivery pipe, the inside of the cold insulation shell is filled with pearl sand, the inner wall of the cold insulation shell is fixedly installed with temperature insulation layer on one side, the inner wall of the cold insulation shell is fixedly installed with adsorption layer, the inner surface of the cold insulation shell left and right sides are evenly distributed and are provided with mesh.

[0007] Preferably, the cold medium delivery pipe is arranged as "Z" shape, and the pearl sand is wrapped around the middle segment of the cold medium delivery pipe.

[0008] Preferably, the temperature insulation layer is made of polyurethane heat insulation material, and the adsorption layer is a desiccant bag.

[0009] Preferably, the outer surface of the cold insulation shell is fixedly provided with a sealing plug feed port on the upper side, and the outer surface of the cold insulation shell is fixedly installed with a sealing plug discharge port on the lower side.

[0010] Preferably, the sealing plug feed port and the sealing plug discharge port are provided with threaded sealing plug bodies for sealing the pipe ports, and the sealing plug feed port and the sealing plug discharge port are in communication with the inside of the cold insulation shell.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1. The pearlescent sand, temperature insulation layer, adsorption layer and mesh hole are arranged, the pearlescent sand can effectively block the heat exchange between low-temperature gas and the outside, plays an effective cold insulation effect on the cold medium conveying pipe, the temperature insulation layer prevents the cold insulation shell from heat exchanging with the outside temperature, avoids the generation of moisture in the inside due to temperature difference, avoids the moisture pollution of the pearlescent sand, can keep the inside temperature of the whole cold insulation shell, and the cold insulation effect of the pearlescent sand is improved twice, if slight moisture appears in the inside of the cold insulation shell, the moisture can also pass through the mesh hole and be quickly absorbed by the adsorption layer, so that the dryness of the pearlescent sand is improved.

[0013] 2. The utility model discloses simple overall structure design, low in cost, and convenient to maintain and replace, and the practicality is stronger. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the whole three-dimensional structure schematic diagram of the utility model;

[0015] Figure 2 It is the whole front view sectional structure schematic diagram of the utility model;

[0016] Figure 3 It is the whole three-dimensional structure schematic diagram of the utility model Figure 2 It is the enlarged structure schematic diagram of A place in the utility model.

[0017] In the drawing: 1, cold insulation shell;2, cold medium conveying pipe;3, pearlescent sand;4, temperature insulation layer;5, adsorption layer;6, mesh hole;7, sealing plug feed port;8, sealing plug discharge port. DETAILED DESCRIPTION

[0018] 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 protection scope of the utility model.

[0019] As Figures 1-3As shown, a kind of air separation cold box multilayer insulation structure, including cold insulation shell 1, the surface of cold insulation shell 1 left and right sides are fixed with the same cold medium conveying pipe 2, the inside of cold insulation shell 1 is filled with pearlite 3, the inner wall of cold insulation shell 1 is fixedly installed with temperature insulation layer 4, the inner wall of cold insulation shell 1 is fixedly installed with adsorption layer 5, and the inner surface of cold insulation shell 1 left and right sides are evenly distributed with mesh 6;

[0020] Temperature insulation layer 4 is polyurethane insulation material, and adsorption layer 5 is desiccant bag.

[0021] By adopting the above technical scheme, the pearlite 3 can effectively block the heat exchange between the low-temperature gas and the outside, and plays a cold insulation role on the cold medium conveying pipe 2.

[0022] The temperature insulation layer 4 prevents the cold insulation shell 1 from exchanging heat with the outside, and avoids the generation of moisture in the cold insulation shell 1 due to the temperature difference between the inside and outside.

[0023] If there is slight moisture in the cold insulation shell 1, the moisture can also pass through the mesh 6 and be quickly absorbed by the adsorption layer 5.

[0024] Further, the cold medium conveying pipe 2 is arranged in a "Z" shape, and the pearlite 3 is located in the cold insulation shell 1 to cover the middle section of the cold medium conveying pipe 2.

[0025] By adopting the above technical scheme, the stroke of the "Z" shaped cold medium conveying pipe 2 in the cold insulation shell 1 is greatly prolonged, so that the pearlite 3 can fully insulate the cold medium passing through this section.

[0026] Further, the outer surface of the cold insulation shell 1 is fixedly provided with a sealing plug feeding port 7 on the upper side, and a sealing plug discharging port 8 is fixedly installed on the lower side of the outer surface of the cold insulation shell 1.

[0027] The sealing plug feeding port 7 and the sealing plug discharging port 8 are both provided with a threaded sealing plug body to seal the pipe port, and the sealing plug feeding port 7 and the sealing plug discharging port 8 are both in communication with the inside of the cold insulation shell 1.

[0028] By adopting the above technical scheme, the sealing plug feeding port 7 and the sealing plug discharging port 8 can be used to fill, discharge and replace the pearlite 3 in the cold insulation shell 1.

[0029] Working principle: when using the multi-layer insulation structure of the air separation cold box, first, the pearlite 3 fills into the cold insulation shell 1 by filling the feed port 7 with a sealing plug, after filling, the feed port 7 is closed with a sealing plug, at this time, the pearlite 3 tightly covers the cold medium conveying pipe 2, when the cold medium is conveyed in the pipeline, the pearlite 3 can effectively block the heat exchange between the low-temperature gas and the outside, and effectively insulate the cold medium conveying pipe 2, at the same time, the temperature insulation layer 4 prevents the cold insulation shell 1 from exchanging heat with the outside temperature, avoids the generation of moisture due to temperature difference, avoids the pollution of the pearlite 3 by the moisture, and can maintain the internal temperature of the whole cold insulation shell 1, which indirectly improves the cold insulation effect of the pearlite 3, if there is slight moisture in the cold insulation shell 1, the moisture can also pass through the mesh 6 and be quickly absorbed by the adsorption layer 5, thereby improving the dryness of the pearlite 3, the long-term used pearlite 3 can be discharged through the sealing plug discharge port 8, so as to replace the pearlite 3 and ensure the normal cold insulation effect of the cold insulation shell 1, this is the working principle of the multi-layer insulation structure of the air separation cold box.

Claims

1. A multi-layer insulation structure for a cold box of an air separation unit, comprising a cold shell (1), characterized in that, The surface of the cold preservation shell (1) is fixed with a same cold medium conveying pipe (2) penetratingly installed on the left and right sides, the inside of the cold preservation shell (1) is filled with pearlite (3), the inner wall of the cold preservation shell (1) is fixed with a temperature insulation layer (4) on the periphery of one side, the inner wall of the cold preservation shell (1) is fixed with an adsorption layer (5) on the inner side, and the inner surface of the cold preservation shell (1) is evenly distributed with mesh holes (6) on the left and right sides.

2. A multi-layer insulation structure for a cold box according to claim 1, wherein The cold medium conveying pipe (2) is arranged in a "Z" shape, and the pearlite (3) is located in the inside of the cold preservation shell (1) to cover the middle section of the cold medium conveying pipe (2).

3. A multi-layer insulation structure for a cold box according to claim 1, wherein The temperature insulation layer (4) is polyurethane heat preservation material, and the adsorption layer (5) is a desiccant bag.

4. The multi-layer insulation structure of a cold box according to claim 1, wherein The outer surface of the cold preservation shell (1) is fixed with a sealed plug feeding port (7) on the upper side, and the outer surface of the cold preservation shell (1) is fixed with a sealed plug discharging port (8) on the lower side.

5. A multi-layer insulation structure for a cold box according to claim 4, wherein The sealed plug feeding port (7) and the sealed plug discharging port (8) are both provided with a threaded screw type sealed plug body to seal the pipeline port, and the sealed plug feeding port (7) and the sealed plug discharging port (8) are both communicated with the inside of the cold preservation shell (1).

Images