Deicing system for outer surface of air temperature type vaporizer

Abstract

The utility model provides a deicing system for the outer surface of an air temperature type vaporizer, which comprises an air supply module for supplying air to the upper side and the lower side of the air temperature type vaporizer through a blow-off main pipeline, and a plurality of blow-off nozzles for spraying air are arranged on the blow-off main pipeline on the upper side and the lower side of the air temperature type vaporizer and correspond to the air temperature type vaporizer. And a gas supply valve for controlling gas distribution and a pressure-regulating gas distribution plate for regulating gas pressure are arranged on the blowing main pipeline close to the gas supply module. And a pressure detection module for detecting a pressure value is arranged on the pressure-regulating gas distribution plate. And the control module is in control connection with the air supply valve, the pressure-regulating air distribution plate and the pressure detection module. According to the deicing system, the upper surface and the lower surface of the air temperature type vaporizer are blown off at the same time through the blowing-off pipeline, different blowing-off schemes can be adopted for blowing off according to different freezing conditions, blowing-off gas is saved to a certain degree, and the blowing-off efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of gas generation systems for rocket engine test benches, specifically to an air-temperature vaporizer outer surface de-icing system and method. Background Technology

[0002] The nitrogen generation system of the liquid oxygen / methane liquid rocket engine test stand uses a liquid nitrogen storage tank to supply liquid nitrogen, which is then pumped by a liquid nitrogen plunger pump into an ambient temperature plate-finned vaporizer. The vaporizer's fins exchange heat with the ambient air, converting the liquid nitrogen into nitrogen gas, which is then transported to a high-pressure nitrogen storage tank, completing the nitrogen generation process. Because the vaporizer is located in an open environment, in low ambient temperatures and during inclement weather such as rain or snow, the temperature difference can cause localized or widespread freezing on the vaporizer's outer surface during the nitrogen generation process. This reduces the vaporizer's heat exchange efficiency, resulting in excessively long nitrogen generation times and severely impacting the gas requirements for the test. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an air-temperature vaporizer outer surface de-icing system to solve the problems of easy freezing of the outer surface of the vaporizer and low liquid nitrogen vaporization efficiency in the prior art when the ambient temperature is low.

[0004] This utility model provides a de-icing system for the outer surface of an ambient air vaporizer. The de-icing system includes: a gas supply module that supplies gas to the upper and lower sides of the ambient air vaporizer through a purging main pipe; multiple purging nozzles for jetting are provided on the purging main pipe located on the upper and lower sides of the ambient air vaporizer, corresponding to the ambient air vaporizer; a gas supply valve for controlling gas distribution and a pressure regulating plate for adjusting gas pressure are provided near the gas supply module on the purging main pipe; a pressure detection module for detecting pressure values ​​is provided on the pressure regulating plate; and a control module controls and connects the gas supply valve, the pressure regulating plate, and the pressure detection module.

[0005] Furthermore, a large purging control valve is installed on the main purging pipeline located downstream of the pressure regulating and gas distribution plate; small purging pipelines are connected in parallel on the main purging pipelines at both ends of the large purging control valve, and small purging control valves are installed on the small purging pipelines; both the large purging control valve and the small purging control valve are electrically connected to the control module.

[0006] Furthermore, a flow-limiting large orifice plate is installed on the main purging pipe downstream of the large purging control valve to limit the gas flow rate; a flow-limiting small orifice plate is installed on the small purging pipe downstream of the small purging control valve to limit the gas flow rate.

[0007] Furthermore, a large purging bypass pipe is connected in parallel to the main purging pipe at both ends of the large purging control valve, and a large purging bypass valve is installed on the large purging bypass pipe; a small purging bypass pipe is connected in parallel to the small purging pipe at both ends of the small purging control valve, and a small purging bypass valve is installed on the small purging bypass pipe; the large purging bypass valve and the small purging bypass valve are opened and closed manually.

[0008] In this embodiment of the invention, a shut-off valve is provided on the main purging pipeline between the upstream of the large purging control valve and the downstream of the pressure regulating and gas distribution plate. A heating pipeline is connected in parallel on the main purging pipeline at both ends of the shut-off valve, and a heater for heating the gas is provided on the heating pipeline. The shut-off valve is electrically connected to the control module.

[0009] Furthermore, the heating pipes at both ends of the heater are provided with heater inlet valves and heater outlet valves for controlling the opening and closing of the pipes; the heater inlet valves and the heater outlet valves are electrically connected to the control module.

[0010] In this embodiment of the invention, the pressure detection module includes a pressure sensor and a pressure gauge, wherein the pressure sensor is electrically connected to the control module; and the pressure gauge is used to display the real-time pressure of the pressure regulating and distributing plate on-site.

[0011] In this embodiment of the invention, the gas supply module is a nitrogen storage tank.

[0012] In the embodiments of this utility model, multiple end purging pipes are connected in parallel at the downstream end of the main purging pipe. The end purging pipes are distributed on the upper and lower sides of the ambient air vaporizer. The purging nozzles are evenly distributed on the end purging pipes, and the openings of the purging nozzles face the upper or lower surface of the ambient air vaporizer.

[0013] As can be seen from the above embodiments, the de-icing system for the outer surface of an air-conditioned vaporizer provided by this utility model has at least the following advantages: the de-icing system simultaneously blows away the upper and lower surfaces of the air-conditioned vaporizer through the main blowing pipe, and can adopt different blowing schemes (i.e., adopt different blowing gas flow rates and select to heat the blowing gas flow) according to different freezing conditions, which saves blowing gas to a certain extent and can greatly improve the blowing efficiency and improve the heat exchange efficiency of the air-conditioned vaporizer.

[0014] It should be understood that the above general description and the following specific embodiments are merely exemplary and illustrative, and do not limit the scope of the present invention. Attached Figure Description

[0015] The accompanying drawings are part of the specification of this utility model and illustrate exemplary embodiments of the utility model. The drawings, together with the description in the specification, are used to illustrate the principles of this utility model.

[0016] Figure 1 This is a schematic diagram of the structure of an air-temperature vaporizer outer surface de-icing system provided by this utility model.

[0017] Figure 2 This is a three-dimensional structural diagram of an air-temperature vaporizer outer surface de-icing system provided by this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] A-Ambient vaporizer, B-Nitrogen storage tank, C-Pressure regulating and gas distribution plate, D-Heater, K1-Flow limiting large orifice plate, K2-Flow limiting small orifice plate, P1-Pressure sensor, P2-Pressure gauge, M-Control module;

[0020] a1-Air supply valve, a2-Shut-off valve, a3-Large purge control valve, a4-Small purge control valve, a5-Large purge bypass valve, a6-Small purge bypass valve, b1-Heater inlet valve, b2-Heater outlet valve;

[0021] d1 - Main purging pipe, d2 - Small purging pipe, d3 - Large purging bypass pipe, d4 - Small purging bypass pipe, d5 - Heating pipe, d6 - Terminal purging pipe, e1 - Purging nozzle. Detailed Implementation

[0022] Various exemplary embodiments of the present invention are now described in detail. This detailed description should not be considered as a limitation of the present invention, but should be understood as a more detailed description of certain aspects, features and implementations of the present invention.

[0023] Various improvements and variations can be made to the specific embodiments described in this utility model without departing from the scope or spirit of this utility model, which will be obvious to those skilled in the art. Other embodiments derived from this utility model description will also be obvious to those skilled in the art. This application specification and embodiments are merely exemplary.

[0024] This utility model provides an air-temperature vaporizer external surface de-icing system, such as... Figure 1 and 2The diagram shows the structure of the de-icing system. In a specific embodiment, the de-icing system includes: a gas supply module B, which supplies gas to the upper and lower sides of the ambient air vaporizer A via a main purging pipe d1. Multiple purging nozzles e1 are installed on the main purging pipe d1 corresponding to the ambient air vaporizer A. Gas is sprayed through the purging nozzles e1 onto the surface of the ambient air vaporizer A and onto the finned plates on the surface, removing the ice layer. In this embodiment, preferably, the purging gas is nitrogen, and the gas supply module B is a nitrogen storage tank. Specifically, the ambient air vaporizer A is used for nitrogen generation on the liquid oxygen / methane liquid rocket engine test stand. During the generation process, liquid nitrogen is supplied from a liquid nitrogen storage tank and transported to the interior of the ambient air vaporizer A. Heat exchange occurs between the liquid nitrogen and the ambient air temperature through the finned plates on the vaporizer, converting the liquid nitrogen inside the vaporizer into nitrogen gas. The nitrogen is then transported to a high-pressure nitrogen storage tank to complete the nitrogen gasification process. The nitrogen stored in this tank can be used to purge the surface of the ambient air vaporizer A, reducing the need for external storage tanks, simplifying the system structure, and ensuring a sufficient gas supply.

[0025] The main purging pipeline d1 is equipped with a gas supply valve a1 for controlling gas distribution and a pressure regulating distribution plate C for adjusting gas pressure near the gas supply module B. The pressure regulating distribution plate C is equipped with a pressure detection module for detecting pressure values. In this embodiment, the pressure regulating distribution plate C is adjusted according to the required pressure, thereby regulating the pressure value required for nitrogen purging. Since the nitrogen source stored in the nitrogen storage tank is designed to have a pressure of ≤30MPa, which is considered high pressure, the pressure regulating distribution plate C needs to reduce the pressure to the required low-pressure purging pressure before use. Using the pressure regulating distribution plate also ensures the stability of the gas distribution.

[0026] In addition, the control module M controls the air supply valve a1, the pressure regulating and distribution plate C, and the pressure detection module. In the purging system of this application, the air supply valve a1, the pressure regulating and distribution plate C, and the pressure detection module can be remotely controlled on-site, thereby realizing remote control of the purging of the ice layer on the surface of the ambient air vaporizer A, which greatly improves the operating efficiency and ensures the operating safety.

[0027] In a specific implementation of this utility model, a large purging control valve a3 is installed on the main purging pipeline d1 located downstream of the pressure regulating and gas distribution plate C, which is used to control the opening and closing of the pipeline, thereby realizing the control of the purging airflow.

[0028] A small purging pipe d2 is connected in parallel to the main purging pipe d1 at both ends of the large purging control valve a3. A small purging control valve a4 is installed on the small purging pipe d2. Both the large purging control valve a3 and the small purging control valve a4 are electrically connected to the control module M, which can remotely control the opening and closing of the valves.

[0029] Furthermore, a flow-limiting large orifice plate K1 is installed on the main purging pipeline d1 downstream of the large purging control valve a3 to limit the gas flow.

[0030] A flow-limiting orifice plate K2 is installed on the small purging pipe d2 downstream of the small purging control valve a4 to limit the gas flow. In this embodiment, both the large flow-limiting orifice plate K1 and the small flow-limiting orifice plate K2 can limit the gas flow rate from the main purging pipe d1 to the ambient air vaporizer A to a certain extent. The large flow-limiting orifice plate K1 provides a larger gas flow rate than the small flow-limiting orifice plate K2, but both are less than the maximum gas flow rate of the main purging pipe d1 at the same gas pressure. When purging the surface of the ambient air vaporizer, the gas flow can be selected to pass through the large flow-limiting orifice plate K1, the small flow-limiting orifice plate K2, or both, depending on the freezing conditions, before flowing to the ambient air vaporizer A. The flow-limiting plates are installed because their production cost is lower than that of the regulating valve, thus reducing the overall system cost.

[0031] Furthermore, a large purging bypass pipe d3 is connected in parallel to the main purging pipe d1 at both ends of the large purging control valve a3, and a large purging bypass valve a5 is installed on the large purging bypass pipe d3.

[0032] A small purging bypass pipe d4 is connected in parallel to the small purging pipe d2 at both ends of the small purging control valve a4, and a small purging bypass valve a6 is installed on the small purging bypass pipe a4.

[0033] The large purging bypass valve a5 and the small purging bypass valve a6 are manually controlled to open and close, and are suitable for on-site control of airflow to purge the surface of the ambient air vaporizer A.

[0034] In this embodiment, the large purging control valve a3 and the flow-limiting large orifice plate K1 are installed on the main purging pipe d1 and located between the two ends of the small purging pipe d2 and the connection point of the main purging pipe d1.

[0035] In a specific embodiment of this utility model, a shut-off valve a2 is provided on the main purging pipeline d1 between the upstream of the large purging control valve a3 and the downstream of the pressure regulating distribution plate C. Specifically, the shut-off valve a2 is located on the main purging pipeline a1 between the upstream end of the small purging pipeline d2 and the connection point of the main purging pipeline a1 and the pressure regulating distribution plate C.

[0036] A heating pipe d5 is connected in parallel to the main purging pipe d1 at both ends of the shut-off valve a2. A heater D for heating the gas is installed on the heating pipe d5. In this embodiment, the connection points between the two ends of the heating pipe d5 and the main purging pipe a1 are also located on the main purging pipe a1 between the upstream end of the small purging pipe d2 and the connection point of the main purging pipe a1 and the pressure regulating and gas distribution plate C.

[0037] The shut-off valve a2 is electrically connected to the control module M, which allows for remote control of the valve's opening and closing.

[0038] Furthermore, heater inlet valve b1 and heater outlet valve b2 are installed on the heating pipes d5 at both ends of heater D to control the opening and closing of the pipes.

[0039] The heater inlet valve b1 and heater outlet valve b2 are electrically connected to the control module M, which can remotely control the opening and closing of the valves.

[0040] In a specific embodiment of this utility model, the pressure detection module includes a pressure sensor P1 and a pressure gauge P2. The pressure sensor P1 is electrically connected to the control module M. The pressure sensor P1 is used to remotely monitor the pressure value on the nitrogen purging pipeline at the outlet of the pressure regulating and gas distribution plate C. The control module M adjusts the pressure regulating and gas distribution plate C in real time according to this pressure value to achieve a stable airflow supply.

[0041] Pressure gauge P2 is used to display the real-time pressure of the pressure regulating and gas distribution plate C on-site, and to monitor the pressure value on the nitrogen purging pipeline at the outlet of the pressure regulating and gas distribution plate C, so as to facilitate on-site adjustment and control of the purging.

[0042] In a specific embodiment of this utility model, multiple end purging pipes d6 are connected in parallel at the downstream end of the main purging pipe d1. The end purging pipes d6 are distributed correspondingly on the upper and lower sides of the ambient air vaporizer A. Purging nozzles e1 are evenly distributed on the end purging pipes d6, and the openings of the purging nozzles e1 face the upper or lower surface of the ambient air vaporizer A. Specifically, the multiple end purging pipes d6 are arranged parallel to each other on the upper and lower sides of the ambient air vaporizer A. The air inlet of each end purging pipe d6 is connected to the main purging pipe d1 for supplying air through the main purging pipe d1.

[0043] The method of using the air-temperature vaporizer external surface de-icing system provided by this utility model includes:

[0044] (1) When there is slight freezing on the outer surface of the plate fins of the ambient temperature vaporizer A.

[0045] Remote control for surface blowing:

[0046] First, the gas supply valve a1 is opened by the control system M, and the nitrogen in the nitrogen storage tank B is delivered to the pressure regulating distribution plate C through the purging main pipeline d1. According to the pressure value displayed by the pressure sensor P1 on the pressure regulating distribution plate C, the pressure is adjusted by the control system M through the pressure regulating valve on the pressure regulating distribution plate C. When the pressure sensor P1 shows that the purged nitrogen has reached the required set pressure value P, the pressure regulation stops and the pressure is kept stable.

[0047] Then, the remotely controlled shut-off valve a2 and the small purging control valve a4 are opened sequentially. The purging nitrogen, after pressure regulation, passes through the main purging pipe d1, the small purging pipe d2, the flow-limiting orifice plate K2, and then splits into two paths. One path is delivered to the end purging pipe d6, located directly above the fins at the top of the vaporizer. A small flow of nitrogen is used to purge the slight ice layer on the outer surface of the fins using a purging nozzle e1 positioned at the fin position. The other path is delivered to the end purging pipe d6, located directly below the fins at the bottom of the vaporizer. A small flow of nitrogen is used to purge the slight ice layer on the outer surface of the fins using a purging nozzle e1 positioned at the fin position.

[0048] After the slight freezing on the outer surface of the plate fins has been blown away, close the shut-off valve a2 and the small purging control valve a4 in sequence. During subsequent nitrogen production, if slight freezing repeatedly occurs on the outer surface of the plate fins, the shut-off valve a2 and the small purging control valve a4 can be opened intermittently to purge the surface. After nitrogen production is complete, close the gas supply valve a1, the pressure regulating valve in the pressure distribution plate C, the shut-off valve a2, and the small purging control valve a4 in sequence. At this point, the slight freezing on the outer surface of the plate fins has been completely purged by nitrogen.

[0049] On-site control of surface blowing:

[0050] Adjust the pressure of the pressure regulating valve in the pressure regulating and gas distribution plate C on site. When the pressure gauge P2 shows that the nitrogen purging reaches the required set pressure value P, remotely open the shut-off valve a2, and then manually open the small purging bypass valve a6. This allows for manual purging of a small flow of nitrogen on the outer surface of the plate fins where there is slight freezing.

[0051] (2) When there is a relatively severe freezing phenomenon on the outer surface of the plate fins of the ambient temperature vaporizer A.

[0052] Remote control for surface blowing:

[0053] First, the gas supply valve a1 is opened by the control system M, and the nitrogen in the nitrogen storage tank B is delivered to the pressure regulating distribution plate C through the purging main pipeline d1. According to the pressure value displayed by the pressure sensor P1 on the pressure regulating distribution plate C, the pressure is adjusted by the control system M through the pressure regulating valve on the pressure regulating distribution plate C. When the pressure sensor P1 shows that the purged nitrogen has reached the required set pressure value P, the pressure regulation stops and the pressure is kept stable.

[0054] Then, remotely, the shut-off valve a2 and the large purging control valve a3 are opened sequentially (or the shut-off valve a2, the large purging control valve a3, and the small purging control valve a4 are opened sequentially). The purging nitrogen after pressure regulation passes through the main purging pipe d1 and the flow-limiting large orifice plate K1 and is then divided into two paths. One path is delivered to the end purging pipe d6 located directly above the plate fins at the top of the vaporizer. A large flow of nitrogen is used to purge the more severe ice on the outer surface of the plate fins by setting the purging nozzle e1 at the plate fin location. The other path is delivered to the end purging pipe d6 located directly below the plate fins at the bottom of the vaporizer. A large flow of nitrogen is used to purge the more severe ice on the outer surface of the plate fins by setting the purging nozzle e1 at the plate fin location. Alternatively, the shut-off valve a2, the large purging control valve a3, and the small purging control valve a4 can be opened simultaneously and remotely. The purging nitrogen after pressure regulation passes through the main purging pipeline d1, the flow-limiting large orifice plate K1, and the flow-limiting small orifice plate K2 to purge the outer surface of the plate fins where there is severe freezing.

[0055] After the severe freezing on the outer surface of the plate fins has been completely removed, sequentially close the shut-off valve a2 and the large purging control valve a3, or sequentially close the shut-off valve a2, the large purging control valve a3, and the small purging control valve a4. During subsequent nitrogen generation, if severe freezing repeatedly occurs on the outer surface of the plate fins, the shut-off valve a2 and the large purging control valve a3, or the shut-off valve a2, the large purging control valve a3, and the small purging control valve a4, can be intermittently opened for purging. After nitrogen generation is complete, sequentially close the gas supply valve a1, the pressure regulating valve in the pressure distribution plate C, the shut-off valve a2, the large purging control valve a3, and / or the small purging control valve a4, thus completing the removal of severe freezing on the outer surface of the plate fins.

[0056] On-site control of surface blowing:

[0057] Adjust the pressure of the pressure regulating valve in the pressure regulating and gas distribution plate C on site. When the pressure gauge P2 shows that the nitrogen purging has reached the required set pressure value P, remotely open the shut-off valve a2, and then manually open the large purging bypass valve a5 or simultaneously open the large purging bypass valve a5 and the small purging bypass valve a6. If there is a relatively severe freezing phenomenon on the outer surface of the plate fins, perform on-site manual large-flow nitrogen purging.

[0058] (3) When there is severe freezing on the outer surface of the plate fins of the ambient temperature vaporizer A.

[0059] Remote control for surface blowing:

[0060] First, the gas supply valve a1 is opened by the control system M, and the nitrogen in the nitrogen storage tank B is delivered to the pressure regulating distribution plate C through the purging main pipeline d1. According to the pressure value displayed by the pressure sensor P1 on the pressure regulating distribution plate C, the pressure is adjusted by the control system M through the pressure regulating valve on the pressure regulating distribution plate C. When the pressure sensor P1 shows that the purged nitrogen has reached the required set pressure value P, the pressure regulation stops and the pressure is kept stable.

[0061] Then, the heater inlet valve b1, heater outlet valve b2, and large purging control valve a3 are opened remotely in sequence. The pressure-regulated purging nitrogen is then transported to heater D via the main purging pipeline d1 and heating pipeline d5 for continuous heating, maintaining the nitrogen temperature between 60℃ and 80℃. The heated nitrogen is then divided into two streams after passing through heating pipeline d5, main purging pipeline d1, and flow-limiting large orifice plate K1. One stream is transported to the end purging pipeline d6 directly above the fins at the top of the vaporizer, where a large flow of hot nitrogen is used to purge the severely frozen outer surface of the fins using purging nozzles e1. The other stream is transported to the end purging pipeline d6 directly below the fins at the bottom of the vaporizer, where a large flow of hot nitrogen is used to purge the severely frozen outer surface of the fins using purging nozzles e1. Alternatively, the heater inlet valve b1, heater outlet valve b2, large purging control valve a3, and small purging control valve a4 can be opened simultaneously and remotely in sequence. The heated nitrogen gas then passes through the heating pipe d5, the main purging pipe d1, the flow-limiting large orifice plate K1, and the flow-limiting small orifice plate K2 to purge the severely frozen outer surface of the plate fins with a large flow rate of hot nitrogen gas.

[0062] After the severe freezing on the outer surface of the plate fins has been completely removed, sequentially close the heater inlet valve b1, heater D, heater outlet valve b2, and large purging control valve a3, or the heater inlet valve b1, heater D, heater outlet valve b2, large purging control valve a3, and small purging control valve a4. During subsequent nitrogen production, if severe freezing repeatedly occurs on the outer surface of the plate fins, intermittently open the heater inlet valve b1, heater D, heater outlet valve b2, and large purging control valve a3, or simultaneously open the heater inlet valve b1, heater D, heater outlet valve b2, large purging control valve a3, and small purging control valve a4 for hot nitrogen purging. After nitrogen production is complete, sequentially close the gas supply valve a1, the pressure regulating valve in the pressure distribution plate C, the heater inlet valve b1, heater D, heater outlet valve b2, large purging control valve a3, and / or small purging control valve a4. The severe freezing on the outer surface of the plate fins has now been removed.

[0063] On-site control of surface blowing:

[0064] Adjust the pressure of the pressure regulating valve in the pressure regulating distribution plate C on site. When the pressure gauge P2 shows that the nitrogen purging has reached the required set pressure value P, remotely open the heater inlet valve b1, heater D, and heater outlet valve b2. Then manually open the large purging bypass valve a5 or simultaneously open the large purging bypass valve a5 and the small purging bypass valve a6. Severe freezing may occur on the outer surface of the plate fins. Manually purge with a large flow of hot nitrogen on site.

[0065] The above description is merely an illustrative embodiment of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A de-icing system for the outer surface of an ambient air vaporizer, characterized in that, The de-icing system includes: an air supply module (B), which supplies air to the upper and lower sides of the ambient air vaporizer (A) through a purge main pipe (d1). The purge main pipe (d1) located on the upper and lower sides of the ambient air vaporizer (A) is provided with a plurality of purge nozzles (e1) for spraying air. The main purging pipe (d1) is equipped with a gas supply valve (a1) for controlling gas delivery and a pressure regulating and distribution plate (C) for adjusting gas pressure near the gas supply module (B). The pressure regulating and gas distribution plate (C) is equipped with a pressure detection module for detecting pressure values; The control module (M) controls the gas supply valve (a1), the pressure regulating and distribution plate (C), and the pressure detection module.

2. The de-icing system for the outer surface of an ambient temperature vaporizer according to claim 1, characterized in that, A large purge control valve (a3) ​​is installed on the purge main pipe (d1) located downstream of the pressure regulating and gas distribution plate (C); Small purging pipes (d2) are connected in parallel to the main purging pipes (d1) at both ends of the large purging control valve (a3), and small purging control valves (a4) are installed on the small purging pipes (d2). Both the large purge control valve (a3) ​​and the small purge control valve (a4) are electrically connected to the control module (M).

3. The de-icing system for the outer surface of an ambient temperature vaporizer according to claim 2, characterized in that, A flow-limiting orifice plate (K1) is installed on the main purging pipe (d1) downstream of the large purging control valve (a3) ​​to limit the gas flow rate; A flow-limiting orifice plate (K2) is provided on the small purging pipe (d2) downstream of the small purging control valve (a4) to limit the gas flow.

4. The de-icing system for the outer surface of an ambient temperature vaporizer according to claim 2, characterized in that, A large purging bypass pipe (d3) is connected in parallel to the main purging pipe (d1) at both ends of the large purging control valve (a3), and a large purging bypass valve (a5) is installed on the large purging bypass pipe (d3). A small purge bypass pipe (d4) is connected in parallel to the small purge pipe (d2) at both ends of the small purge control valve (a4), and a small purge bypass valve (a6) is installed on the small purge bypass pipe (a4). The large purge bypass valve (a5) and the small purge bypass valve (a6) are opened and closed manually.

5. The de-icing system for the outer surface of an ambient temperature vaporizer according to claim 2, characterized in that, A shut-off valve (a2) is installed on the main purging pipeline (d1) between the upstream of the large purging control valve (a3) ​​and the downstream of the pressure regulating gas distribution plate (C). A heating pipeline (d5) is connected in parallel on the main purging pipeline (d1) at both ends of the shut-off valve (a2). A heater (D) for heating the gas is installed on the heating pipeline (d5). The shut-off valve (a2) is electrically connected to the control module (M).

6. The de-icing system for the outer surface of an ambient temperature vaporizer according to claim 5, characterized in that, The heater (D) is equipped with a heater inlet valve (b1) and a heater outlet valve (b2) on the heating pipes (d5) at both ends for controlling the opening and closing of the pipes; The heater inlet valve (b1) and the heater outlet valve (b2) are electrically connected to the control module (M).

7. The de-icing system for the outer surface of an ambient temperature vaporizer according to claim 1, characterized in that, The pressure detection module includes a pressure sensor (P1) and a pressure gauge (P2), wherein, The pressure sensor (P1) is electrically connected to the control module (M); The pressure gauge (P2) is used to display the real-time pressure of the pressure regulating and distribution plate (C) on site.

8. The de-icing system for the outer surface of an ambient temperature vaporizer according to claim 1, characterized in that, The gas supply module (B) is a nitrogen storage tank.

9. The de-icing system for the outer surface of an ambient temperature vaporizer according to claim 1, characterized in that, Multiple end purging pipes (d6) are connected in parallel at the downstream end of the main purging pipe (d1). The end purging pipes (d6) are distributed on the upper and lower sides of the ambient air vaporizer (A). The purging nozzles (e1) are evenly distributed on the end purging pipes (d6), and the openings of the purging nozzles (e1) face the upper or lower surface of the ambient air vaporizer (A).

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