A device for recovering steam in situ by jacket cooling water residual cold

Abstract

The utility model provides a device of remaining cold quantity recycling of jacket cooling water just in place vent steam, including pipe jacket cooling water pipeline, just in place vent steam pipeline, heat exchanger, cold medium collection jar, steam condensate recovery jar, pipe jacket cooling water pipeline end export first pipe line connection heat exchanger's cold medium import, be provided with first stop valve on the connecting pipe, heat exchanger's cold medium export and cold medium collection jar pipe line connection, just in place vent steam pipeline and heat exchanger heat medium import pipeline connection, be provided with fourth stop valve on the connecting pipeline, heat exchanger heat medium export and steam condensate recovery jar pipe line connection, and this device can make full use of the remaining cold quantity effective recovery of the vent steam produced in the chemical production process, realize the resource recycling and reuse while improving the on -the -spot environment.

Description

Technical Field

[0001] This utility model belongs to the field of synthetic ammonia technology, specifically relating to a device for recovering and venting steam on-site by utilizing the residual cooling capacity of the system cooling water. Background Technology

[0002] In the routine operation of an ammonia synthesis plant, the cooling system is a crucial component. Depending on the type and physical properties of the cooling medium used, appropriate heat exchange equipment is typically configured. In actual engineering design, for safety redundancy and operational stability considerations, the design cooling capacity of heat exchangers is often higher than the actual required cooling load. While this ensures the system's ability to cope with abnormal fluctuations, it inevitably leads to some energy idleness and waste. Simultaneously, the ammonia synthesis process continuously generates a certain amount of high-quality hot fluids such as steam and high-temperature boiler water. If these media are not effectively utilized and are directly disposed of through venting, it not only wastes water resources and causes heat loss but also fails to meet the environmental protection requirements of green manufacturing, energy conservation, and emission reduction.

[0003] Finding ways to recycle and utilize this energy is an effective breakthrough for further improving energy efficiency and environmental protection. Summary of the Invention

[0004] The purpose of this invention is to provide a device for recovering vented steam on-site by utilizing the residual cooling capacity of jacketed cooling water. This device can make full use of the residual cooling capacity to effectively recover vented steam generated during chemical production, thereby achieving resource recycling and reuse while improving the on-site environment.

[0005] To achieve the above objectives, the technical solution of this utility model is a device for recovering residual cooling capacity of jacketed cooling water and venting steam locally, comprising a jacketed cooling water pipeline, a local venting steam pipeline, a heat exchanger, a cold medium collection tank, and a steam condensate recovery tank. The cooling water pipeline of the tube jacket splits into two outlets. The first outlet connects to the cold medium inlet of the heat exchanger and is equipped with a first shut-off valve. The cold medium outlet of the heat exchanger is connected to the cold medium collection tank. The second outlet connects to the cold medium collection tank and is equipped with a third shut-off valve. The local venting steam pipeline is connected to the heat medium inlet pipeline of the heat exchanger, and a fourth shut-off valve is installed on the connecting pipeline. The heat medium outlet of the heat exchanger is connected to the steam condensate recovery tank pipeline.

[0006] The heat exchanger is a plate heat exchanger.

[0007] A second shut-off valve is installed on the pipeline connecting the cold medium outlet of the heat exchanger and the cold medium collection tank.

[0008] The outlet pipe of the steam condensate recovery tank is connected to a condensate transfer pump, and a sixth shut-off valve is installed on the connecting pipe. The outlet pipe of the condensate transfer pump is connected to a vacuum pump tank, and a seventh shut-off valve is installed on the connecting pipe.

[0009] A return pipe is provided on the pipeline connecting the outlet of the condensate transfer pump to the vacuum pump tank. The other end of the return pipe is connected to the upper part of the steam condensate recovery tank, and an eighth shut-off valve is provided on the return pipe.

[0010] The steam condensate recovery tank is equipped with an overflow pipe at the top, which is connected to a trench. The height of the overflow pipe from the bottom of the tank is 4 / 5 of the tank height.

[0011] The advantages of this invention lie in its ingenious use of the residual cooling capacity of the cooling system to effectively recover the vented steam, thereby greatly eliminating the unorganized emission of steam, improving the on-site environment, and resulting in good environmental and economic benefits. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0013] like Figure 1 As shown, a device for recovering vented steam by utilizing the residual cooling capacity of jacketed cooling water includes a jacketed cooling water pipeline, a vented steam pipeline, a plate heat exchanger W-716, a cold medium collection tank, and a steam condensate recovery tank. The cooling water pipeline of the tube jacket is divided into two pipelines at its end. The first pipeline is connected to the cold medium inlet of the heat exchanger and is equipped with a first shut-off valve 11. The cold medium outlet of the heat exchanger is connected to the cold medium collection tank pipeline. The second pipeline is equipped with a second shut-off valve 12 and is connected to the cold medium collection tank. The second pipeline is equipped with a third shut-off valve 13. The local venting steam pipeline is connected to the steam collector and is connected to the heat medium inlet pipeline of the heat exchanger. A fourth shut-off valve 14 is installed on the connecting pipeline. The steam collector is optional. In this embodiment, the steam collector is an existing device in the original main cooling process of the tube jacket. The heat medium outlet of the heat exchanger is connected to the steam condensate recovery tank pipeline. The first, second, third, and fourth shut-off valves can be used to disconnect the plate heat exchanger from the main cooling process of the tube jacket, thereby facilitating the maintenance of the plate heat exchanger. At the same time, the fourth shut-off valve can be used to control the steam flow to ensure that the temperature of the tube jacket cooling water does not deviate and does not affect the main cooling process.

[0014] After steam enters the heat exchanger W-716 and exchanges heat with the cold medium, the resulting condensate can be collected into the steam condensate recovery tank. The outlet pipe of the steam condensate recovery tank is connected to a condensate transfer pump 9, and a sixth shut-off valve 16 is installed on the connecting pipe. The outlet pipe of the condensate transfer pump is connected to the user's 5600# vacuum pump pool for reuse, and a seventh shut-off valve 17 is installed on the connecting pipe. A return pipe is installed on the connecting pipe between the outlet of the condensate transfer pump and the vacuum pump pool. The other end of the return pipe is connected to the upper part of the steam condensate recovery tank, and an eighth shut-off valve 18 is installed on the return pipe. The liquid level in the condensate recovery tank is maintained by adjusting the return flow rate according to the liquid level gauge indication in the condensate recovery tank. An overflow pipe 8 is installed at the upper part of the steam condensate recovery tank, and the overflow pipe 8 is connected to the trench. The height of the overflow pipe 8 and the bottom of the tank is 4 / 5 of the tank height.

[0015] The shut-off valves in this application can all achieve flow regulation function, and the plate heat exchanger, cold medium collection tank, and steam condensate recovery tank themselves are all existing technologies.

[0016] The working process of this utility model is as follows: (1) Heat exchanger W-716 enters the system: Open the first shut-off valve 11 and the second shut-off valve 12 of the heat exchanger. After confirming that the cold medium flow is normal, close the third shut-off valve. The heat exchanger enters the system flow and confirms that the cold medium circulation is normal. (2) Steam enters the heat exchanger: Gradually open the fourth shut-off valve 14 of the local vent steam pipeline to the heat medium inlet of heat exchanger W-716, and slowly close the local fifth shut-off valve 15 of the steam collector (used to vent steam). Steam enters heat exchanger W-716. Confirm that the inlet and outlet temperature difference is normal, the heat exchange is normal and there is no pressure buildup. Adjust the steam supply according to the cold medium return water temperature of heat exchanger W-716. (3) Steam condensate is delivered to the user: Confirm that the condensate transfer pump is ready to start and that there is liquid discharge from the overflow pipe of the condensate recovery tank; fully open the sixth shut-off valve 16 of the condensate transfer pump, fully close the seventh shut-off valve 17 at the outlet of the condensate transfer pump, and slightly open the eighth shut-off valve 18 on the return pipeline of the condensate transfer pump; start the condensate transfer pump, confirm that the pressure and current are normal, and slowly open the seventh shut-off valve 17 according to the pump outlet pressure to deliver the steam condensate to the user. Adjust the external supply of the condensate transfer pump according to the liquid level indication of the condensate recovery tank to ensure that the liquid level of the condensate recovery tank is greater than 60%. This utility model can make full use of the cold energy of the cold medium to effectively recover the vented steam generated in the chemical production process, realize resource recycling and reuse, and improve the on-site environment at the same time.

Claims

1. A device for recovering on-site vented steam by utilizing the residual cooling capacity of jacketed cooling water, characterized in that, This includes jacketed cooling water pipelines, on-site venting steam pipelines, heat exchangers, cold medium collection tanks, and steam condensate recovery tanks. The cooling water pipeline of the tube jacket splits into two outlets. The first outlet connects to the cold medium inlet of the heat exchanger and is equipped with a first shut-off valve. The cold medium outlet of the heat exchanger is connected to the cold medium collection tank. The second outlet connects to the cold medium collection tank and is equipped with a third shut-off valve. The local venting steam pipeline is connected to the heat medium inlet pipeline of the heat exchanger, and a fourth shut-off valve is installed on the connecting pipeline. The heat medium outlet of the heat exchanger is connected to the steam condensate recovery tank pipeline.

2. The apparatus for recovering residual cooling capacity of jacketed cooling water and venting steam on-site according to claim 1, characterized in that, The heat exchanger is a plate heat exchanger.

3. The apparatus for recovering residual cooling capacity of jacketed cooling water and venting steam on-site according to claim 1, characterized in that, A second shut-off valve is installed on the pipeline connecting the cold medium outlet of the heat exchanger and the cold medium collection tank.

4. The apparatus for recovering residual cooling capacity of jacketed cooling water and venting steam on-site according to claim 1, characterized in that, The outlet pipe of the steam condensate recovery tank is connected to a condensate transfer pump, and a sixth shut-off valve is installed on the connecting pipe. The outlet pipe of the condensate transfer pump is connected to a vacuum pump tank, and a seventh shut-off valve is installed on the connecting pipe.

5. The apparatus for recovering residual cooling capacity of jacketed cooling water and venting steam on-site according to claim 4, characterized in that, A return pipe is provided on the pipeline connecting the outlet of the condensate transfer pump to the vacuum pump tank. The other end of the return pipe is connected to the upper part of the steam condensate recovery tank. An eighth shut-off valve is provided on the return pipe.

6. The apparatus for recovering residual cooling capacity of jacketed cooling water and venting steam on-site according to claim 4, characterized in that, The steam condensate recovery tank is equipped with an overflow pipe at the top, which is connected to a trench. The height of the overflow pipe from the bottom of the tank is 4 / 5 of the tank height.

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