Instrument air dehydration system in cold region

Abstract

The utility model discloses an instrument air dehydration system in a cold region, which comprises an air inlet pipe and an air outlet pipe, an air cooling body is arranged between the air inlet pipe and the air outlet pipe, the air cooling body comprises an air inlet plate and an air outlet plate, the air inlet pipe is communicated with the air inlet plate, and the air outlet plate is communicated with the air outlet pipe; a plurality of groups of flow guide cooling fins are uniformly arranged between the air inlet plate and the air outlet plate, the air inlet plate is communicated with the air outlet plate through the flow guide cooling fins, and a liquid discharge pipe is further arranged at the bottom end of the air outlet plate. In combination with the characteristic of low environmental temperature in winter in northern China and based on a wet air cooling and water separating principle, outdoor cold air is used for cooling, water separating and drying compressed air.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical instruments, in particular to an instrument air dehydration system in cold regions. Background Art

[0002] In the process of compressed air source purification, water removal is a necessary step. The hazards caused by water in compressed air are mainly manifested in: condensed water on pneumatic equipment will carry away the lubricating oil, causing equipment efficiency to decrease or even damage; condensed water will also accelerate the wear of valves in the pipeline, causing pneumatic control equipment failure or misoperation; and cause pipelines and equipment to rust; if water freezes at the low point of the pipeline, the pipeline is also in danger of bursting.

[0003] Water in compressed air can be caused by a variety of reasons, including unreasonable process design, improper operation, structural problems of the equipment itself, and technical level problems of the equipment and control components. Excessive water content in compressed air directly affects the air pipeline and equipment using compressed air. Therefore, solving the problem of water content in compressed air is a major problem at present.

[0004] How to efficiently remove moisture contained in high-temperature compressed air is of great significance to the safe operation of chemical instruments. Conventional gas drying systems use micro-heat regeneration dryers to dry compressed air. In northern my country, there is a long period of rain and snow in winter, and the air humidity increases, which increases the load of the micro-heat regeneration dryer, resulting in a decrease in the dehumidification capacity of the dryer, which is easy to cause ice blockage in the outdoor gas pipeline and other problems, affecting the safe operation of chemical instruments. Utility Model Content

[0005] In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to propose an instrument air dehydration system for cold areas, which utilizes the low temperature of the cold environment to cool down the moisture in the high-temperature compressed air and precipitate it, so as to achieve a good dehydration effect.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides an instrument air dehydration system for cold regions, comprising an air inlet pipe and an air outlet pipe, an air cooling body is arranged between the air inlet pipe and the air outlet pipe, the air cooling body comprises an air inlet plate and an air outlet plate, the air inlet pipe is connected to the air inlet plate, the air outlet plate is connected to the air outlet pipe; a plurality of groups of guide fins are evenly arranged between the air inlet plate and the air outlet plate, the guide fins connect the air inlet plate and the air outlet plate, and a drain pipe is also arranged at the bottom of the air outlet plate. Further, the guide fins are evenly arranged with a plurality of tubular cavities to increase the heat dissipation area; in this way, heat exchange with the low-temperature environment is performed to achieve a drying effect of heat dissipation, condensation and removal of moisture, and further, a guide step is fixed at the bottom of the air outlet plate to allow the precipitated liquid water to flow to the drain pipe for discharge.

[0008] The preferred technical solution of the utility model is that the air inlet end of the air inlet plate and the air inlet pipe are connected by a flange, an air inlet valve is provided on the pipeline connecting the air inlet end of the air inlet plate and the air inlet pipe, and the air outlet end of the air outlet plate and the air outlet pipe are connected by a flange, and an air outlet valve is provided on the pipeline connecting the air outlet end of the air outlet plate and the air outlet pipe. This is convenient for assembly and also conducive to subsequent inspection and maintenance.

[0009] An optimal technical solution of the utility model is that support feet are fixedly provided at the bottom of the air outlet plate to support the air-cooling body.

[0010] An optimal technical solution of the utility model is that it also includes an intermediate pipeline, one end of which is connected to the air inlet pipe, and the other end is connected to the air outlet pipe, the two ends of the intermediate pipeline are respectively integrally formed with the air inlet pipe and the air outlet pipe, and a control valve is also provided on the intermediate pipeline, and the control valve is opened during maintenance.

[0011] The beneficial effects of the utility model are:

[0012] (1) The high-temperature compressed air at the outlet of the air compressor is cooled by air cooling, and the condensed water in the compressed air is discharged from the bottom of the air cooling, and then enters the instrument air drying system, thereby removing the moisture in the compressed air and supplying air to the pneumatic instrument valves in the factory area. This not only meets the air supply problem of instruments in cold areas, but also greatly increases the service life of the desiccant;

[0013] (2) This utility model combines the characteristics of low ambient temperature in winter in northern my country, based on the principle of humid air cooling and dehydration, and uses outdoor cold air to cool and dehydrate the compressed air. According to the analysis of on-site operation data, the condensation heat exchange system operates stably in winter, and more than 90% of the moisture is effectively removed, meeting the requirements of industrial gas moisture content. The dehumidification effect is good. After the compressed air is dried, the temperature is mostly between 20℃ and 23℃, far away from the pressure dew point, meeting the design requirements, and ensuring the safety of the gas pipeline and gas system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the principle of a cold region instrument air dehydration system provided in a specific embodiment of the utility model;

[0015] Figure 2 It is a structural schematic diagram of an air-cooling body provided in a specific embodiment of the utility model;

[0016] Figure 3 It is a cross-sectional schematic diagram of a guide heat sink provided in a specific embodiment of the utility model;

[0017] In the figure:

[0018] 1. Inlet pipe; 2. Outlet pipe; 3. Air cooling body; 31. Inlet plate; 32. Outlet plate; 33. Guide fin; 321. Drain pipe; 311. Inlet valve; 322. Outlet valve; 323. Guide step; 34. Support foot; 4. Intermediate pipeline; 41. Control valve. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0020] Example 1: Figure 1~2 As shown, an instrument air dehydration system for cold regions includes an air inlet pipe 1 and an air outlet pipe 2, an air cooling body 3 is arranged between the air inlet pipe 1 and the air outlet pipe 2, the air cooling body 3 includes an air inlet plate 31 and an air outlet plate 32, the air inlet pipe 1 is connected to the air inlet plate 31, and the air outlet plate 32 is connected to the air outlet pipe 2; a plurality of groups of guide fins 33 are evenly arranged between the air inlet plate 31 and the air outlet plate 32, the guide fins 33 connect the air inlet plate 31 and the air outlet plate 32, and a drain pipe 321 is also arranged at the bottom of the air outlet plate 32. This case is based on the principle of cooling and dehydrating wet air, that is, using outdoor cold air to cool and dehydrate compressed air to achieve the ultimate drying effect, and the high-temperature compressed air at the outlet of the air compressor enters the air cooling system, and after the compressed air is cooled, the condensed water generated is discharged through the valve, and the dehydrated compressed air enters the drying system for further drying, and the dry instrument air enters the instrument air duct network to supply air to various pneumatic instrument valves in the factory area; specifically, when in use, after the high-temperature water-containing air is passed from the air inlet pipe 1 into the guide heat sink 33, due to the low ambient temperature, the moisture is dissipated and condensed in the guide heat sink 33. Further, in order to improve the effect of heat dissipation and condensation, Figure 3As shown, the guide heat sink 33 is evenly provided with a plurality of tubular cavities to increase the heat dissipation area, so as to achieve a good dehydration effect. The water after heat dissipation and condensation will be enriched in the air outlet plate 32. At this time, the dried air flows out from the air outlet end of the air outlet plate 32 through the air outlet pipe 2, and the enriched condensed water will be discharged through the drain pipe 321 at the bottom of the air outlet plate 32. In order to facilitate the discharge of condensed water, a guide step 323 is further provided at the bottom of the air outlet plate 32 to allow the precipitated liquid water to flow to the drain pipe 321 for discharge. The high-temperature, water-containing air coming in from the air inlet pipe 1 can be continuously dried through heat dissipation and condensation. According to the analysis of on-site operation data, the condensation heat exchange system operates stably in winter, and more than 90% of the moisture is effectively removed, meeting the requirements for the moisture content of industrial gas. The dehumidification effect is good. The temperature of the compressed air after drying is mostly between 20°C and 23°C, far away from the pressure dew point, meeting the design requirements, and ensuring the safety of the gas transmission pipeline and the gas system; at the same time, a support foot 34 is fixed at the bottom of the air outlet plate 32 to support the air-cooled body 3.

[0021] Preferably, in order to facilitate the inspection and maintenance of the air-cooling body 3, the air inlet end of the air inlet plate 31 is connected to the air inlet pipe 1 through a flange, and an air inlet valve 311 is also provided on the pipeline connecting the air inlet end of the air inlet plate 31 and the air inlet pipe 1, and the air outlet end of the air outlet plate 32 is connected to the air outlet pipe 2 through a flange, and an air outlet valve 322 is also provided on the pipeline connecting the air outlet end of the air outlet plate 32 and the air outlet pipe 2. In this way, during inspection and maintenance, the air inlet valve 311 and the air outlet valve 322 are closed, and the flanges are conveniently disassembled for subsequent operations.

[0022] Embodiment 2: The difference from Embodiment 1 is that it further comprises an intermediate pipeline 4, one end of which is connected to the air inlet pipe 1, and the other end is connected to the air outlet pipe 2, and the two ends of the intermediate pipeline 4 are respectively integrally formed with the air inlet pipe 1 and the air outlet pipe 2, and a control valve 41 is also provided on the intermediate pipeline 4. When the control valve 41 is opened during maintenance, since the air inlet valve 311 and the air outlet valve 322 are in a closed state during maintenance, the control valve 41 is opened at this time, so that the normal operation of the entire compressed air system will not be affected.

[0023] The present invention is described by preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein, and other embodiments falling within the claims of this application are within the scope of protection of the present invention.

Claims

1. An instrument air dehydration system for cold regions, comprising an air inlet pipe (1) and an air outlet pipe (2), characterized in that: An air cooling body (3) is arranged between the air inlet pipe (1) and the air outlet pipe (2), the air cooling body (3) comprising an air inlet plate (31) and an air outlet plate (32), the air inlet pipe (1) and the air inlet plate (31) are in communication, and the air outlet plate (32) and the air outlet pipe (2) are in communication; a plurality of groups of guide fins (33) are evenly arranged between the air inlet plate (31) and the air outlet plate (32), the guide fins (33) connect the air inlet plate (31) and the air outlet plate (32), and a drain pipe (321) is also arranged at the bottom end of the air outlet plate (32).

2. The cold region instrument air dehydration system according to claim 1, characterized in that: The air inlet end of the air inlet plate (31) and the air inlet pipe (1) are connected via a flange, and an air inlet valve (311) is also provided on the pipeline connecting the air inlet end of the air inlet plate (31) and the air inlet pipe (1). The air outlet end of the air outlet plate (32) and the air outlet pipe (2) are connected via a flange, and an air outlet valve (322) is also provided on the pipeline connecting the air outlet end of the air outlet plate (32) and the air outlet pipe (2).

3. The cold region instrument air dehydration system according to claim 1, characterized in that: The guide heat sink (33) is evenly provided with a plurality of tubular cavities to increase the heat dissipation area.

4. The cold region instrument air dehydration system according to claim 1, characterized in that: A guide step (323) is fixedly provided at the bottom of the gas outlet plate (32) so as to allow the precipitated liquid water to flow toward the liquid discharge pipe (321) for discharge.

5. The cold region instrument air dehydration system according to claim 1, characterized in that: A supporting foot (34) is fixedly provided at the bottom of the air outlet plate (32) to support the air cooling body (3).

6. The cold region instrument air dehydration system according to claim 2, characterized in that: It also includes an intermediate pipeline (4), one end of the intermediate pipeline (4) is connected to the air inlet pipe (1), and the other end is connected to the air outlet pipe (2), the two ends of the intermediate pipeline (4) are respectively integrally formed with the air inlet pipe (1) and the air outlet pipe (2), and the intermediate pipeline (4) is also provided with a control valve (41), and during maintenance, the control valve (41) is opened.

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