A cryogenic liquid jacketed finned tube vaporization device

Abstract

A low-temperature liquid jacketed finned tube vaporization structure, which consists of an outer tube and a finned tube arranged in the outer tube, the finned tube consists of a first finned tube and a second finned tube, wherein the first finned tube and the second fin are arranged vertically, and a finned tube compensation elbow is provided at the connection between the first finned tube and the second fin, an L-shaped inner tube is formed between the first finned tube, the second finned tube and the finned tube compensation elbow, the outer tube is also provided with a first outer tube, a second outer tube and an outer tube compensation elbow with the same structure as the inner tube, the first finned tube is provided with a sampling gas outlet, the second finned tube is provided with a sampling liquid inlet, the first outer tube is provided with a heat source gas outlet, the second outer tube is provided with a heat source gas inlet, and the ends of the outer tubes are respectively provided with pipe caps. The present invention has the advantages of simple structure, strong practicality, low cost, safe performance, easy installation, etc.

Description

Technical Field

[0001] The invention relates to a low-temperature liquid jacketed finned tube type vaporization structure, belonging to the technical field of structural design. Background Art

[0002] Driven by the rapid development of my country's coal chemical, petrochemical, electronic gas and other industries, the air separation industry has developed rapidly. As the "eyes" of the air separation process, instrumentation data plays a vital role in the precise operation and safety control of air separation units. As important products in the air separation industry, liquid oxygen and krypton-xenon liquids contain flammable, explosive, and crystallizable dangerous components such as methane, carbon dioxide, and nitrous oxide. Once the content exceeds the standard, it is very easy to cause safety accidents. Therefore, how to accurately monitor the content of dangerous components in liquid samples in real time becomes particularly important. Summary of the invention

[0003] The present invention is applied to the vaporization of cryogenic liquids, and the technical problems to be solved are as follows: when the cryogenic liquid is continuously sampled, the components in the liquid cannot be vaporized at the same time due to their different boiling points, which causes the liquid phase components in the sampling medium to concentrate, or even crystallize, and ultimately the vaporization is not complete, and ultimately the content of dangerous components in the sampled liquid cannot be truly reflected; the temperature of the cryogenic liquid is about -185°C, and the problem of compensating for the low-temperature shrinkage of the vaporization structure becomes more prominent.

[0004] The present invention solves the above-mentioned problem mainly through the following structure: a low-temperature liquid jacketed finned tube vaporization device, which consists of an outer tube and a finned tube arranged in the outer tube, the finned tube consists of a first finned tube and a second finned tube, wherein the first finned tube and the second fin are arranged vertically, and a finned tube compensation elbow is provided at the connection between the first finned tube and the second fin, an L-shaped inner tube is formed between the first finned tube, the second finned tube and the finned tube compensation elbow, the outer tube is also provided with a first outer tube, a second outer tube and an outer tube compensation elbow with the same structure as the inner tube, the first finned tube is provided with a sampling gas outlet, the second finned tube is provided with a sampling liquid inlet, the first outer tube is provided with a heat source gas outlet, the second outer tube is provided with a heat source gas inlet, and the ends of the outer tubes are respectively provided with pipe caps.

[0005] Preferably, the first fin tube, the second fin tube and the fin tube compensation elbow are all provided with fins, and the fins are cross-arranged so that the heat source gas flows in a zigzag shape between the fins, thereby extending the heat exchange time.

[0006] Preferably, the first fin tube, the second fin tube and the fin tube compensation elbow are connected by welding.

[0007] Preferably, the first outer tube, the second outer tube and the outer tube compensation elbow are connected by welding.

[0008] The present invention has the following advantages: simple structure, strong practicality, low cost, safe performance, easy installation, and stable and reliable analysis results, which provides strong support for the long-term and safe operation of the air separation device, thereby saving maintenance and repair costs and maximizing the economic benefits of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a cross-sectional schematic diagram of the present invention;

[0010] Figure 2 It is a schematic diagram of a fin tube of the present invention;

[0011] Figure 3 for Figure 2 A-direction schematic diagram;

[0012] Figure 4 It is a schematic diagram of the fin of the present invention. DETAILED DESCRIPTION

[0013] The present invention will be described in detail below in conjunction with the accompanying drawings: Figure 1-4 As shown, a cryogenic liquid jacketed finned tube vaporizer is composed of an outer tube 3 and a finned tube 2 arranged in the outer tube, wherein the finned tube 2 is composed of a first finned tube and a second finned tube, wherein the first finned tube 8 and the second finned tube 9 are arranged vertically, and a finned tube compensation elbow 5 is provided at the connection between the first finned tube 8 and the second finned tube 9, an L-shaped inner tube 7 is formed between the first finned tube 8, the second finned tube 9, and the finned tube compensation elbow 5, the outer tube 1 is also provided with a first outer tube 10, a second outer tube 11, and an outer tube compensation elbow 4 having the same structure as the inner tube 7, and the first finned tube 8 is provided with a sampling gas outlet 1 2, a sampling liquid inlet 13 is provided on the second finned tube 9, a heat source gas outlet 14 is provided on the first outer tube 10, a heat source gas inlet 15 is provided on the second outer tube, and tube caps 1 are provided at the ends of the outer tubes respectively, fins 6 are provided on the first finned tube 8, the second finned tube 9, and the finned tube compensation elbow 5, and the fins 6 are cross-arranged so that the heat source gas flows in a zigzag shape between the fins to extend the heat exchange time, the first finned tube 8, the second finned tube 9, and the finned tube compensation elbow 5 are connected by welding, and the first outer tube 10, the second outer tube 11, and the outer tube compensation elbow 4 are connected by welding.

[0014] The vaporization structure of the present invention has an L-shaped appearance. Different components are connected by welding to form a heat exchange channel. The heat source gas flows in the cavity between the fin tube and the outer tube, and the low-temperature liquid flows in the fin tube. The two exchange heat through the fins and the inner tube wall of the fin tube; the fins in the fin tube 2 are specially designed and cross-arranged, so that the heat source gas flows in a zigzag shape between the fins, extending the heat exchange time and helping the low-temperature liquid to vaporize quickly; the outer tube compensation bend 4 and the fin tube compensation bend 5 can effectively reduce the stress load acting on the tube cap 1 when the inner tube shrinks and the outer tube expands due to the temperature difference. The low-temperature liquid flows in the inner tube and fully contacts and exchanges heat with the heat source gas in the outer tube through the inner tube wall and the fins, and finally all the liquid components are vaporized, thereby meeting the process analysis requirements.

[0015] On the one hand, the present invention meets the requirement of complete vaporization of cryogenic liquid components, which is beneficial to the accuracy of component measurement. On the other hand, the compensating bend structure can effectively reduce the stress load on the pipe cap 1 caused by the contraction of the inner pipe and the expansion of the outer pipe due to the temperature difference between the inner and outer pipes.

Claims

1. A cryogenic liquid jacketed finned tube vaporizer, which consists of an outer tube and a finned tube arranged inside the outer tube, characterized in that The fin tube is composed of a first fin tube and a second fin tube, wherein the first fin tube and the second fin are arranged vertically, and a fin tube compensation elbow is provided at the connection between the first fin tube and the second fin, an L-shaped inner tube is formed between the first fin tube, the second fin tube and the fin tube compensation elbow, and the outer tube is also provided with a first outer tube, a second outer tube and an outer tube compensation elbow with the same structure as the inner tube, a sampling gas outlet is provided on the first fin tube, a sampling liquid inlet is provided on the second fin tube, a heat source gas outlet is provided on the first outer tube, a heat source gas inlet is provided on the second outer tube, and pipe caps are provided at the ends of the outer tubes respectively; fins are provided on the first fin tube, the second fin tube and the fin tube compensation elbow, and the fins are arranged crosswise so that the heat source gas flows in a zigzag shape between the fins to extend the heat exchange time; the first fin tube, the second fin tube and the fin tube compensation elbow are connected by welding.

2. The cryogenic liquid jacketed finned tube vaporizer according to claim 1, characterized in that The first outer tube, the second outer tube and the outer tube compensation elbow are all connected by welding.

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