Non-contact heat exchanger for precooling system of air separation machine

Abstract

The utility model relates to a non-contact heat exchanger for a precooling system of an air separation machine, which comprises a base, a cylinder and a cooling flow channel, the cylinder is arranged on the base, the cylinder is in a three-section type and comprises an air inlet chamber, a cooling chamber and a purification chamber which are communicated in sequence, an air inlet pipe is arranged at the upper end of the air inlet chamber, a porous fin group and a corrugated fin group are arranged in the cooling chamber, and the cooling flow channel is communicated with the cooling chamber. The two porous fin sets are arranged at the two ends of the corrugated fin set respectively, the cooling flow channel comprises branch flow channels and main flow channels, the branch flow channels are in a U shape, the branch flow channels are inserted into the barrel side by side at intervals and connected with the porous fin sets and the corrugated fin set for heat transfer, and the two ends of each branch flow channel are communicated with the two main flow channels respectively. The whole equipment is integrally designed, the integration degree is high, the installation workload of field maintenance personnel is reduced, the design that the porous fin sets are arranged at the two ends of the corrugated fin set respectively can effectively improve the heat dissipation efficiency during diameter changing of compressed air, then the length of a cooling chamber can be reduced, and the overall occupied area of the equipment is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to air separation equipment technical field especially relates to a kind of non-contact heat exchanger for air separation machine precooling system. BACKGROUND

[0002] Air separation equipment is with air as raw material, through the compressed cycle deep freezing method air becomes liquid, again after rectification and from liquid air gradually separated production oxygen, nitrogen and argon inert gas equipment, widely used in traditional metallurgy, new coal chemical industry, large nitrogen fertilizer, professional gas supply and other fields.The structure of current air separation equipment includes air compression system, purification system, liquefaction refrigeration system and rectification system, in the purification system, input compressed air needs to be purified using spray method, washes and removes acidic substances in air, before purification, compressed air needs to be cooled, because under low temperature condition, acidic gas (such as SO2, HCl) solubility in water or alkaline solution is higher, it is beneficial to enhance washing effect, current purification system and cooling module lack integration, it is distributed design, when installing, field is communicated through pipeline, increase the workload of field after-sales personnel, the skill proficiency requirement of field after-sales is higher, secondly, the cooling effect of current plate-fin radiator to compressed air is not good, leading to subsequent washing effect is not complete, thus further improvement is needed. SUMMARY

[0003] Therefore, it is necessary to provide a non-contact heat exchanger for air separation machine precooling system in view of the above problems.

[0004] A non-contact heat exchanger for air separation machine precooling system, comprising a base, a cylinder and a cooling flow channel, the cylinder is installed on the base, the cylinder is three-section type, comprising an air inlet chamber, a cooling chamber and a purification chamber connected in sequence, the air inlet chamber is provided with an air inlet pipe at the upper end, the cooling chamber is provided with a plurality of porous fin groups and corrugated fin groups, two groups of the porous fin groups are respectively arranged at both ends of the corrugated fin groups, the cooling flow channel comprises branch flow channels and main flow channels, the branch flow channels are U-shaped, a plurality of the branch flow channels are inserted into the cylinder in parallel and interval, and are connected with the porous fin groups and the corrugated fin groups for heat transfer, the two ends of the branch flow channels are respectively connected with two main flow channels.

[0005] Preferably, the air inlet chamber is provided with a guide plate, and the guide plate is inclinedly arranged along the air inlet direction of the air inlet pipe.

[0006] Preferably, a conical guide cylinder is arranged at the connection between the cooling chamber and the purification chamber, the top end of the conical guide cylinder extends to the side of the purification chamber and is provided with an air outlet pipe, and a plurality of air holes are arranged on the air outlet pipe.

[0007] Preferably, the bottom of the purification chamber is further provided with a water collecting tank which is embedded in the base.

[0008] Preferably, a demisting plate is detachably mounted on the side of the purification chamber away from the cooling chamber, and the end of the air outlet pipe is clamped at the center of the demisting plate.

[0009] The utility model discloses the beneficial effect lies in: the whole equipment integration design, the high integration, has reduced the on -the -spot maintenance personnel installation workload, and the design that the porous fin group is arranged in the both ends of corrugated fin group, can effectively improve the heat dissipation efficiency when the compressed air reducing, and then can reduce the length of cooling chamber, effectively reduces the overall equipment floor area. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 It is a kind of air separation machine precooling system for non-contact heat exchanger three-dimensional schematic view for one embodiment;

[0011] Fig. 2 It is a kind of air separation machine precooling system for non-contact heat exchanger section view schematic view. DETAILED DESCRIPTION

[0012] To make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below with reference to the drawings.In the following description, a lot of specific details are set forth in order to give a thorough understanding of the utility model.However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the following disclosed specific embodiments.

[0013] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element.When an element is considered "connected" to another element, it can be directly connected to the other element or there can be a middle element.The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs.Any terms used herein in the specification of the utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model.The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0015] As Figs. 1-2As shown, a kind of non-contact heat exchanger for air separation machine precooling system, including base 1, cylinder 2 and cooling flow channel 3, the cylinder 2 is installed on base 1, the cylinder 2 is three-stage, including the air inlet chamber 21, cooling chamber 22 and purification chamber 23 communicated in turn, the air inlet pipe 211 is arranged on the upper end of the air inlet chamber 21, the porous fin group 221 and the corrugated fin group 222 are arranged in the cooling chamber 22, two groups of the porous fin group 221 are arranged at the two ends of the corrugated fin group 222 respectively, the cooling flow channel 3 includes branch flow channel 31 and main flow channel 32, the branch flow channel 31 is U-shaped, several branch flow channels 31 are inserted into the cylinder 2 in parallel and interval, and are connected with the porous fin group 221 and the corrugated fin group 222 to transfer heat, the two ends of the branch flow channel 31 are communicated with two main flow channels 32 respectively.In this embodiment, the base 1 is used as the support of the cylinder 2 and is installed on the ground, the cylinder 2 adopts steel shell and has high structural strength, the inside of the cylinder 2 is subjected to rotational molding treatment to improve the air tightness of the cylinder 2 and prevent gas leakage.The cylinder 2 is three-stage, the compressed air after compression enters the air inlet chamber 21 from the air inlet pipe 211 and flows into the cooling chamber 22. The cooling chamber 22 has two groups of the porous fin group 221 and one group of the corrugated fin group 222, the two groups of the porous fin group 221 are arranged at the two ends of the corrugated fin group 222 respectively, and the fins in the porous fin group 221 and the corrugated fin group 222 are horizontally and parallelly arranged in interval, which not only facilitates the flow of compressed air, but also facilitates the branch flow channel 31 to penetrate the fins, increases the contact area and improves the heat transfer efficiency. The porous fin group 221 is located at the two ends, the holes on the single fin can increase the contact area with the compressed air entering and leaving the cooling chamber, so that the heat exchange area in unit volume is maximized. This design can improve the heat dissipation efficiency by more than 30% compared with the traditional flat fin, at the same time, when the compressed air enters and leaves the cooling chamber 22, the cross-sectional area of the flow channel changes, which causes the flow rate of the compressed air to change, the holes in the porous fin group 221 can break the boundary layer by the compressed air passing through the holes, reduce the laminar flow resistance, and directionally control the flow direction of the compressed air, reduce the pressure drop by the hole distribution, and ensure the heat dissipation efficiency in the variable diameter process. The corrugated fin group 222 can increase the contact area with the compressed air and promote the formation of turbulent flow of the compressed air in the flow path, and the more dense the corrugation is, the greater the fluctuation is, and the stronger the heat transfer is. The cooling flow channel 3 flows low-temperature cooling liquid, and the compressed air heat absorbed by the porous fin group 221 and the corrugated fin group 222 is taken away by the branch flow channel 31 in U shape, and then cooling is completed. The purification chamber 23 is used for purifying the compressed air after cooling, specifically, a spray head can be integrated in the purification chamber 23 to spray water mist-shaped purification liquid to remove acidic substances in the compressed air. The whole equipment is designed integrally and has high integration degree, which reduces the installation workload of the site maintenance personnel, and the design that the porous fin group 221 is arranged at the two ends of the corrugated fin group 222 can effectively improve the heat dissipation efficiency when the compressed air is variable-diametered, thereby the length of the cooling chamber 22 can be reduced, and the overall land occupation of the equipment can be effectively reduced.

[0016] As Fig. 2 shown, the air inlet chamber 21 is provided with a guide plate 212, the guide plate 212 is inclined along the air inlet direction of the air inlet pipe 211, specifically, the right upper to the left lower, that is, the compressed air is guided to the side of the cooling chamber 22, the airflow is guided into the cooling chamber 22 for cooling, avoiding forming a local dead zone in the air inlet chamber 21.

[0017] As Fig. 2 shown, the cooling chamber 22 and the purification chamber 23 are provided with a conical guide cylinder 223, the top end of the conical guide cylinder 223 extends to the side of the purification chamber 23 and is provided with an air outlet pipe 224, and a plurality of air holes 2241 are arranged on the air outlet pipe 224. Specifically, the conical guide cylinder 223 is used to converge the cooled compressed air, and the air holes 2241 on the air outlet pipe 224 are used to guide the gas to the purification chamber 23, and the purification is completed. This design greatly reduces the contact area between the cooling chamber 22 and the purification chamber 23, and can avoid the water mist sprayed by the purification chamber 23 into the cooling chamber 22, causing the porous fin group 221 and the corrugated fin group 222 in the cooling chamber 22 to adhere to the water and be corroded.

[0018] As Figs. 1-2 shown, the bottom of the purification chamber 23 is also provided with a water collecting tank 231, and the water collecting tank 231 is embedded in the base 1. The water collecting tank 231 is used to collect the water droplets falling from the top of the purification chamber 23, and is installed in the base 1, so as not to occupy more ground workshop position and reduce the volume.

[0019] As Fig. 2 shown, the purification chamber 23 is detachably installed with a demisting plate 232 away from the cooling chamber 22, and the end of the air outlet pipe 224 is clamped with the center of the demisting plate 232. The demisting plate 232 can remove the water carried by the compressed air, so that the compressed air is as dry as possible to enter the next link for processing.

[0020] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as limiting the scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A non-contact heat exchanger for a pre-cooling system of an air separation plant, characterized in that: The utility model relates to a three -section type air cooler, including base, cylinder and cooling flow channel, the cylinder is installed on the base, the cylinder is three -section type, including the air inlet chamber, cooling chamber and purification chamber who communicate in turn, the air inlet chamber upper end is provided with air inlet pipe, the cooling chamber is provided with porous fin group and corrugated fin group, two group porous fin group sets up respectively in the both ends of corrugated fin group, the cooling flow channel includes branch flow channel and main flow channel, the branch flow channel is U type, and a plurality of branch flow channels are inserted into the cylinder in parallel interval, and are connected heat transfer with porous fin group and corrugated fin group, and the both ends of branch flow channel are communicated with two main flow channels respectively.

2. A non-contact heat exchanger for a pre-cooling system of an air separation unit as set forth in claim 1, characterized by: The air inlet chamber is provided with a guide plate, and the guide plate is inclinedly arranged along the air inlet direction of the air inlet pipe.

3. A non-contact heat exchanger for a pre-cooling system of an air separation unit as set forth in claim 1, characterized by: A conical guide cylinder is arranged at the connection between the cooling chamber and the purification chamber, the top end of the conical guide cylinder extends to the side of the purification chamber and is provided with an air outlet pipe, and a plurality of air holes are arranged on the air outlet pipe.

4. A non-contact heat exchanger for a pre-cooling system of an air separation unit as set forth in claim 3, characterized in that: A water collecting tank is further arranged at the bottom of the purification chamber and is embedded in the base.

5. A non-contact heat exchanger for use in a pre-cooling system of an air separation plant as set forth in claim 4, characterized in that: A demisting plate is detachably mounted on the side of the purification chamber away from the cooling chamber, and the end of the air outlet pipe is clamped with the center of the demisting plate.

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