A condensate recovery system

Abstract

This utility model discloses a condensate recovery system, including a condensate recovery tank and a condensate recovery pump. The condensate outlet at the bottom of the shell side of the steam-sealed condenser is connected to a U-shaped water seal pipe, which is connected to the top of the condensate recovery tank. The overflow pipe of the atmospheric safety valve water seal is connected to the top of the condensate recovery tank. The overflow port on one side of the top of the condensate recovery tank is connected to a drainage ditch. One side of the bottom of the condensate recovery tank is connected to the inlet of the condensate recovery pump. The outlet of the condensate pump is divided into two streams: one stream is connected to the circulating water supply pipe, and the other stream is sent to the dosing tank. This system collects the overflow water from the atmospheric safety valve water seal and the condensate in the steam-sealed condenser in the condensate recovery tank. Then, the condensate is pressurized by the condensate recovery pump and sent to the dosing tank for use and the circulating water supply pipe for recycling. This utility model effectively reduces water waste and the burden on sewage treatment. At the same time, it recovers some heat, reducing thermal pollution and safety hazards caused by hot steam.

Description

Technical Field

[0001] This utility model relates to the field of industrial steam condensate recovery technology, specifically to a condensate recovery system. Background Technology

[0002] In the ammonia synthesis process, the main power source for the syngas compressor turbine is medium-pressure steam, which drives the turbine's rotation. During this process, the turbine requires low-pressure steam for shaft sealing to prevent leakage of the syngas compressor's power steam from the unit's clearances. Leakage of low-pressure steam from the syngas compressor shaft seal and medium-pressure steam from the main steam valve is directly discharged into the sewer through condensation, resulting in resource waste, increased burden on wastewater treatment, and also generating thermal pollution and safety hazards. Summary of the Invention

[0003] To address the aforementioned technical problems, this utility model provides a condensate recovery system. The purpose is to recover and reuse low-pressure steam leakage from turbine shaft seals and medium-pressure steam leakage from main steam valves after condensation in a steam seal condenser. This is achieved by adding a condensate recovery tank and a condensate recovery pump. Directly discharging condensed steam into ditches leads to resource waste. Recovering steam condensate reduces the burden on wastewater treatment units, recovers heat, and simultaneously reduces thermal pollution and safety hazards caused by steam.

[0004] To solve the above-mentioned technical problems, this utility model provides a condensate recovery system: The bottom outlet of the steam seal condenser shell side is connected to a U-shaped water seal pipe; The U-shaped water seal pipe is connected to the top of the condensate recovery tank; The atmospheric safety valve water seal overflow pipe is connected to the top of the condensate recovery tank; The bottom side of the condensate recovery tank is connected to the inlet of the condensate recovery pump. The outlet of the condensate recovery pump is connected to the first valve at the outlet of the condensate recovery pump. The first valve at the outlet of the condensate recovery pump is connected to a check valve; After the check valve, the condensate is divided into two streams for recycling. One stream is connected to the dosing device, and the other stream is connected to the circulating water supply pipe.

[0005] The overflow outlet on one side of the top of the condensate recovery tank is connected to the discharge ditch pipe.

[0006] A level gauge is installed on one side of the condensate recovery tank. A top valve is installed on the upper end of the level gauge, and a bottom valve is installed on the lower end of the level gauge. An observation hole and a cover are opened on the top of the condensate recovery tank.

[0007] A condensate recovery pump inlet valve is installed on the pipe connecting the bottom of the condensate recovery tank to the inlet of the condensate recovery pump. A pressure gauge for the outlet of the condensate recovery pump is installed between the pipeline connecting the outlet of the condensate recovery pump and the first valve at the outlet of the condensate recovery pump; a root valve for the pressure gauge is installed between the pressure gauge at the outlet of the condensate recovery pump and the pipeline connecting the outlet of the condensate recovery pump.

[0008] On the pipeline connecting the condensate pipeline and the dosing device, there is an inlet regulating valve for the condensate recovery dosing tank. The front and rear ends of the condensate recovery dosing tank inlet regulating valve are respectively equipped with a front hand valve and a rear hand valve. The condensate recovery dosing tank inlet regulating valve is also equipped with a bypass valve.

[0009] On the pipeline connecting the condensate pipeline and the circulating water supply pipeline, a condensate recirculation water supply regulating valve is installed. A front hand valve and a rear hand valve are respectively installed at the front and rear ends of the condensate recirculation water supply regulating valve. The condensate recirculation water supply regulating valve is also equipped with a bypass valve.

[0010] A second valve at the outlet of the condensate recovery pump is installed on the pipeline connecting the condensate recirculation water supply regulating valve and the circulating water supply pipeline.

[0011] This invention provides a condensate recovery system where leaking low-pressure steam from the shaft seal of a syngas compressor turbine and leaking steam from the main steam valve undergo heat exchange in a steam seal condenser, condensing the steam into condensate. The condensate then enters a U-shaped water seal pipe from the condensate outlet at the bottom of the steam seal condenser. This U-shaped water seal pipe is connected to the top of a condensate recovery tank, collecting the overflowing condensate there. Another stream of condensate is the overflow water from the atmospheric safety valve water seal, which is also connected to the top of the condensate recovery tank, directly collecting the overflow water there as well. To prevent overflow accidents from a full condensate recovery tank, which could lead to electric shock if the condensate spills onto electrical equipment, an overflow port is installed on one side of the top of the condensate recovery tank. This overflow port connects to a drainage ditch. When the condensate level rises to the overflow port, it drains into the ditch. A level gauge is installed on one side of the condensate recovery tank for easy monitoring of the condensate level. The top of the condensate recovery tank is also covered to prevent dust and other substances from contaminating the condensate. One side of the bottom of the condensate recovery tank connects to the inlet of a condensate recovery pump. After exiting the pump, the condensate is divided into two streams for recycling: one stream is sent to a chemical dosing tank for recycling; the other stream is sent to the circulating water supply pipeline for recycling. The condensate recovery pump pressurizes the condensate to 0.4 MPa, then sends the condensate to the circulating water supply pipeline and the chemical dosing tank for recycling. Regulating valves are installed on the connecting pipes between the condensate recovery pump outlet and the circulating water supply pipeline, as well as on the dosing device connection. Two manual valves are installed at both ends of each regulating valve to cut off the condensate delivery, ensuring timely flow interruption in case of valve malfunction. Both regulating valves also have bypass valves, allowing control of the condensate recovery tank level in case of valve jamming or malfunction. Two manual valves and one check valve are also installed on the connecting pipe between the condensate recovery pump outlet and the circulating water supply pipeline. These two manual valves cut off condensate flow between the condensate recovery pump and the circulating water supply pipeline. A check valve is installed between the two manual valves to prevent backflow of circulating water into the condensate recovery pump due to higher fluid pressure in the circulating water supply pipeline than the condensate pressure at the pump outlet, which could damage the pump. Compared to directly discharging condensate into a ditch, we provide a condensate recovery system that effectively reduces water and heat waste. Recovering steam condensate reduces the burden on wastewater treatment and minimizes thermal pollution and safety hazards from hot steam.

[0012] Preferably, the top of the condensate recovery tank is connected to a U-shaped water seal pipe to collect the overflowing steam condensate in the U-shaped water seal pipe, thereby reducing water waste and reducing the burden of water treatment on sewage treatment.

[0013] Preferably, the top of the condensate recovery tank is connected to the overflow pipe of the atmospheric safety valve water seal to collect the water overflowing from the atmospheric safety valve water seal and reduce water waste.

[0014] Preferably, the top side of the condensate recovery tank is provided with an overflow port connected to the trench to ensure the safe discharge of excess condensate and prevent the condensate recovery tank from overflowing and causing electric shock risk if the condensate spills onto electrical equipment.

[0015] Preferably, a manual valve is installed before the inlet of the condensate recovery pump, and a first valve and a second valve are installed in the middle of the pipeline connecting the outlet of the condensate recovery pump to the circulating water supply pipeline. When the condensate recovery pump malfunctions, it can be disconnected in time, which facilitates the maintenance of the pump.

[0016] Preferably, a condensate recovery pump outlet pressure gauge is installed between the outlet of the condensate recovery pump and the connecting pipe of the first valve at the outlet of the condensate recovery pump, so as to facilitate observation and adjustment of the fluid pressure at the outlet of the condensate pump.

[0017] Preferably, a root valve is installed at the lower end of the outlet pressure gauge of the condensate recovery pump to facilitate timely repair in case of pressure gauge failure.

[0018] Preferably, a manual valve is installed before and after the condensate recirculation water regulating valve and the condensate recovery dosing tank inlet regulating valve. When the two regulating valves malfunction, the regulating valves can be shut off in time to prevent accidents and facilitate valve maintenance.

[0019] Preferably, both the condensate recirculation water regulating valve and the condensate recovery dosing tank inlet regulating valve are equipped with bypass valves, so that the accumulated condensate can be sent out through the bypass when the regulating valve fails.

[0020] More preferably, a level gauge is installed on one side of the condensate recovery tank, through which the liquid level of the condensate recovery tank can be observed.

[0021] More preferably, the condensate recirculation water supply regulating valve and the condensate recovery dosing tank inlet regulating valve can, through the condensate recovery tank level gauge signal, regulate the condensate pressure and flow rate entering the dosing device and the circulating water supply pipeline in stages, preventing the condensate recovery tank from running dry, and ensuring that the pressure from the condensate recovery pipeline to the dosing device is not too high and the pressure from the condensate recovery pipeline to the circulating water supply pipeline is greater than the circulating water pressure.

[0022] In a further preferred embodiment, a pressure gauge damper is installed at the lower end of the pressure gauge at the outlet of the condensate recovery pump to prevent damage to the pressure gauge from pulse pressure.

[0023] In a further preferred embodiment, a check valve is provided after the first valve at the outlet of the condensate recovery pump to prevent circulating water from flowing back into the condensate recovery tank due to a malfunction of the condensate recovery pump.

[0024] The beneficial effects of this utility model are as follows: 1. Equipped with a condensate recovery tank, it can collect condensate from the bottom of the steam seal condenser and overflow water from the atmospheric safety valve water seal, effectively reducing water waste.

[0025] 2. The overflow port on one side of the top of the condensate recovery tank is connected to the discharge ditch pipe to prevent the condensate recovery tank from overflowing when full, which could cause electric shock if the condensate spills onto electrical equipment.

[0026] 3. The top of the condensate recovery tank is equipped with a cover and an observation hole, which can be used to compare with the liquid level gauge to prevent the liquid level gauge from malfunctioning. At the same time, the cover can effectively prevent dust and other substances from entering the condensate recovery tank.

[0027] 4. The condensate recirculation water supply regulating valve and the condensate recovery dosing tank inlet regulating valve can adjust the condensate pressure and flow rate entering the dosing device and the circulating water supply pipeline in stages according to the condensate recovery tank level gauge signal, to prevent the condensate recovery tank from running dry, and at the same time ensure that the pressure from the condensate recovery pipeline to the dosing device is not too high, and that the pressure from the condensate recovery pipeline to the circulating water supply pipeline is greater than the circulating water pressure.

[0028] 5. A pressure gauge damper is installed between the outlet pressure gauge and the valve at the base of the pressure gauge of the condensate recovery pump to prevent damage to the pressure gauge from pulse pressure. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is the overall system flowchart of this utility model. In the diagram: 1 is the steam-sealed condenser; 2 is the U-shaped water seal pipe; 3 is the discharge ditch pipe; 4 is the condensate recovery tank; 5 is the atmospheric safety valve water seal overflow pipe; 6 is the top valve; 7 is the level gauge; 8 is the bottom valve; 9 is the condensate recovery pump inlet valve; 10 is the condensate recovery pump; 11 is the outlet pressure gauge root valve; 12 is the pressure gauge damper; 13 is the condensate recovery pump outlet pressure gauge; 14 is the condensate recovery pump outlet first valve; 15 is the check valve; 16 is the condensate recovery dosing tank inlet. 17 is the inlet control valve of the condensate recovery dosing tank; 18 is the outlet control valve of the condensate recovery dosing tank; 19 is the bypass valve of the inlet control valve of the condensate recovery dosing tank; 20 is the dosing device; 21 is the inlet control valve of the condensate recirculation water supply control valve; 22 is the condensate recirculation water supply control valve; 23 is the outlet control valve of the condensate recirculation water supply control valve; 24 is the bypass valve of the condensate recirculation water supply control valve; 25 is the second valve at the outlet of the condensate recovery pump; and 26 is the circulating water supply pipeline. Detailed Implementation

[0030] The technical solution of this utility model will be further explained below with reference to the accompanying drawings and specific embodiments. It is worth noting that the following embodiments are only preferred embodiments of this utility model and should not be construed as limiting this utility model. The protection scope of this utility model should be determined by the content of the claims. Modifications or substitutions made by those skilled in the art to the technical solution of this utility model without creative effort all fall within the protection scope of this utility model.

[0031] Example 1 The bottom outlet of the shell side of the steam-sealed condenser 1 is connected to the U-shaped water seal pipe 2; U-shaped water seal pipe 2 is connected to the top of condensate recovery tank 4; The atmospheric safety valve water seal overflow pipe 5 is connected to the top of the condensate recovery tank 4; The bottom side of the condensate recovery tank 4 is connected to the inlet of the condensate recovery pump 10; The outlet of the condensate recovery pump 10 is connected to the first outlet valve 14 of the condensate recovery pump, and the first outlet valve 14 of the condensate recovery pump is connected to the check valve 15. After the check valve 15, the condensate is divided into two streams for recovery. One stream is connected to the dosing device 20, and the other stream is connected to the circulating water supply pipe 26. The overflow port on one side of the top of the condensate recovery tank 4 is connected to the discharge ditch pipe 3; a level gauge 7 is installed on one side of the condensate recovery tank 4, a top valve 6 is installed on the upper end of the level gauge 7, a bottom valve 8 is installed on the lower end of the level gauge 7, and a cover plate and an observation hole are installed on the top of the condensate recovery tank 4. A condensate recovery pump inlet valve 9 is installed on the pipe connecting the bottom of the condensate recovery tank 4 to the inlet of the condensate recovery pump 10. A pressure gauge 13 for the outlet of condensate recovery pump 10 is installed between the pipeline connecting the outlet of condensate recovery pump 10 and the first valve 14 at the outlet of condensate recovery pump 14. On the pipeline connecting the condensate pipeline and the dosing device 20, there is a condensate recovery dosing tank inlet regulating valve 17. A condensate recovery dosing tank inlet regulating valve 17 is equipped with a condensate recovery dosing tank inlet regulating valve front hand valve 16 at the front end and a condensate recovery dosing tank inlet regulating valve rear hand valve 18 at the rear end. The condensate recovery dosing tank inlet regulating valve 17 is also equipped with a condensate recovery dosing tank inlet regulating valve bypass valve 19. On the pipeline connecting the condensate pipeline and the circulating water supply pipeline 26, a condensate recirculation water supply regulating valve 22 is installed. A condensate recirculation water supply regulating valve front hand valve 21 is installed at the front end of the condensate recirculation water supply regulating valve 22, and a condensate recirculation water supply regulating valve rear hand valve 23 is installed at the rear end of the condensate recirculation water supply regulating valve 22. A condensate recirculation water supply regulating valve bypass valve 24 is also installed on the condensate recirculation water supply regulating valve 22. A condensate recovery pump outlet pressure gauge 13 is installed between the outlet of the condensate recovery pump 10 and the first valve 15 at the outlet of the condensate recovery pump. The pressure gauge is equipped with a root valve 11. A pressure gauge damper 12 is installed between the condensate recovery pump outlet pressure gauge 13 and the pressure gauge root valve 11. A second valve 25 for the outlet of the condensate recovery pump is installed on the pipeline connecting the condensate recirculation water regulating valve 22 and the circulating water supply pipeline 26.

[0032] Preferably, the top of the condensate recovery tank is connected to a U-shaped water seal pipe to collect the overflowing steam condensate in the U-shaped water seal pipe, thereby reducing water waste and reducing the burden of water treatment on sewage treatment.

[0033] Preferably, the top of the condensate recovery tank is connected to the overflow pipe of the atmospheric safety valve water seal to collect the water overflowing from the atmospheric safety valve water seal and reduce water waste.

[0034] Preferably, the top side of the condensate recovery tank is provided with an overflow port connected to the trench to ensure the safe discharge of excess condensate and prevent the condensate recovery tank from overflowing and causing electric shock risk if the condensate spills onto electrical equipment.

[0035] Preferably, a manual valve is installed before the inlet of the condensate recovery pump, and a first valve and a second valve are installed in the middle of the pipeline connecting the outlet of the condensate recovery pump to the circulating water supply pipeline. When the condensate recovery pump malfunctions, it can be disconnected in time, which facilitates the maintenance of the pump.

[0036] Preferably, a condensate recovery pump outlet pressure gauge is installed between the outlet of the condensate recovery pump and the connecting pipe of the first valve at the outlet of the condensate recovery pump, so as to facilitate observation and adjustment of the fluid pressure at the outlet of the condensate pump.

[0037] Preferably, a root valve is installed at the lower end of the outlet pressure gauge of the condensate recovery pump to facilitate timely repair in case of pressure gauge failure.

[0038] Preferably, a manual valve is installed before and after the condensate recirculation water regulating valve and the condensate recovery dosing tank inlet regulating valve. When the two regulating valves malfunction, the regulating valves can be shut off in time to prevent accidents and facilitate valve maintenance.

[0039] Preferably, both the condensate recirculation water regulating valve and the condensate recovery dosing tank inlet regulating valve are equipped with bypass valves, so that the accumulated condensate can be sent out through the bypass when the regulating valve fails.

[0040] More preferably, a level gauge is installed on one side of the condensate recovery tank, through which the liquid level of the condensate recovery tank can be observed.

[0041] More preferably, the condensate recirculation water supply regulating valve and the condensate recovery dosing tank inlet regulating valve can, through the condensate recovery tank level gauge signal, regulate the condensate pressure and flow rate entering the dosing device and the circulating water supply pipeline in stages, preventing the condensate recovery tank from running dry, and ensuring that the pressure from the condensate recovery pipeline to the dosing device is not too high and the pressure from the condensate recovery pipeline to the circulating water supply pipeline is greater than the circulating water pressure.

[0042] In a further preferred embodiment, a pressure gauge damper is installed at the lower end of the pressure gauge at the outlet of the condensate recovery pump to prevent damage to the pressure gauge from pulse pressure.

[0043] In a further preferred embodiment, a check valve is provided after the first valve at the outlet of the condensate recovery pump to prevent circulating water from flowing back into the condensate recovery tank due to a malfunction of the condensate recovery pump.

[0044] Example 2 Operation Flow The low-pressure steam leakage from the turbine shaft seal of the syngas compressor and the steam leakage from the main steam valve undergo heat exchange in the steam seal condenser, condensing the steam into condensate. The condensate then enters a U-shaped water seal pipe from the condensate outlet at the bottom of the steam seal condenser. This U-shaped water seal pipe connects to the top of the condensate recovery tank, collecting the overflowing condensate there. Another stream of condensate is the overflow water from the atmospheric safety valve water seal, which is also connected to the top of the condensate recovery tank, directly collecting the overflow water there. To prevent overflow accidents in case the condensate recovery tank is full, and to avoid the risk of electric shock from condensate spilling onto electrical equipment, an overflow port is installed on one side of the top of the condensate recovery tank. This overflow port connects to a drainage ditch, allowing the condensate to drain into the ditch when the liquid level rises to the overflow port. A level gauge is installed on one side of the condensate recovery tank to monitor the liquid level. A cover is also installed on the top of the condensate recovery tank to prevent dust and other substances from contaminating the condensate.

[0045] One side of the bottom of the condensate recovery tank is connected to the inlet of the condensate recovery pump. The condensate pump pressurizes the condensate and divides it into two streams for recovery. One stream of condensate is sent to the dosing tank for recovery; the other stream is sent to the circulating water supply pipeline for recovery. The condensate recovery pump increases the condensate pressure to 0.32 MPa and sends the condensate to the circulating water supply pipeline and the dosing tank for recovery. Regulating valves are installed on the connecting pipes between the condensate recovery pump outlet and the circulating water supply pipeline, as well as on the dosing device connection. Two manual valves are installed at both ends of the regulating valves to cut off the condensate delivery, allowing for timely flow interruption in case of valve failure. Both regulating valves also have bypass valves, which can be used to control the condensate recovery tank level in case of valve jamming or malfunction. Two hand valves and one check valve are installed on the connecting pipe between the condensate recovery pump outlet and the circulating water supply pipe. The two hand valves are used to cut off the condensate flow between the condensate recovery pump and the circulating water supply pipe. A check valve is installed between the two hand valves to prevent the fluid pressure in the circulating water supply pipe from exceeding the condensate pressure at the condensate recovery pump outlet, which could cause circulating water to flow back into the condensate recovery pump and damage the pump body. Compared to directly discharging condensate into a ditch, we provide a condensate recovery system that effectively reduces water and heat waste. Recovering steam condensate reduces the burden on wastewater treatment and also reduces thermal pollution and safety hazards caused by hot steam.

Claims

1. A condensate recovery system, characterized in that: The bottom outlet of the shell side of the steam seal condenser (1) is connected to the U-shaped water seal pipe (2); The U-shaped water seal pipe (2) is connected to the top of the condensate recovery tank (4); The bottom side of the condensate recovery tank (4) is connected to the inlet of the condensate recovery pump (10); The outlet of the condensate recovery pump (10) is connected to the first valve (14) at the outlet of the condensate recovery pump; The first valve (14) at the outlet of the condensate recovery pump is connected to the check valve (15); After the check valve (15), the condensate is divided into two streams for recycling. One stream is connected to the dosing device (20), and the other stream is connected to the circulating water supply pipe (26).

2. The condensate recovery system according to claim 1, characterized in that: The overflow port on one side of the top of the condensate recovery tank (4) is connected to the discharge ditch pipe (3); A level gauge (7) is installed on one side of the condensate recovery tank (4). A top valve (6) is installed on the upper end of the level gauge (7), and a bottom valve (8) is installed on the lower end of the level gauge (7). The condensate recovery tank (4) is equipped with a cover plate and an observation hole on the top.

3. The condensate recovery system according to claim 1, characterized in that: The top of the condensate recovery tank (4) is connected to an atmospheric safety valve and a water seal overflow pipe (5); A condensate recovery pump inlet valve (9) is installed on the pipe connecting the bottom of the condensate recovery tank (4) to the inlet of the condensate recovery pump (10).

4. The condensate recovery system according to claim 1, characterized in that: A pressure gauge (13) for the outlet of the condensate recovery pump (10) is installed between the connecting pipes of the outlet of the condensate recovery pump (10) and the first valve (14) at the outlet of the condensate recovery pump.

5. The condensate recovery system according to claim 1, characterized in that: A regulating valve (17) for the inlet of the condensate recovery dosing tank is installed on the pipeline connecting the condensate pipeline and the dosing device (20). A manual valve (16) for the inlet regulating valve of the condensate recovery dosing tank is provided at the front end of the condensate recovery dosing tank inlet regulating valve (17). A manual valve (18) is provided at the rear end of the inlet regulating valve (17) of the condensate recovery dosing tank. The inlet regulating valve (17) of the condensate recovery dosing tank is also equipped with a bypass valve (19) for the condensate recovery dosing tank inlet regulating valve.

6. The condensate recovery system according to claim 1, characterized in that: A condensate recirculation water supply regulating valve (22) is installed on the pipeline connecting the condensate pipeline and the circulating water supply pipeline (26). A condensate recirculation water supply regulating valve (22) is provided with a condensate recirculation water supply regulating valve front hand valve (21) at the front end; A hand valve (23) is provided at the rear end of the condensate recirculation water regulating valve (22). The condensate recirculation water regulating valve (22) is also equipped with a condensate recirculation water regulating valve bypass valve (24).

7. The condensate recovery system according to claim 4, characterized in that: A condensate recovery pump outlet pressure gauge (13) is installed between the outlet of the condensate recovery pump (10) and the first valve (14) of the condensate recovery pump outlet. The pressure gauge is equipped with a root valve (11), and a pressure gauge damper (12) is installed between the condensate recovery pump outlet pressure gauge (13) and the pressure gauge root valve (11).

8. The condensate recovery system according to claim 6, characterized in that: A second valve (25) for the outlet of the condensate recovery pump is installed on the pipeline connecting the condensate recirculation water supply regulating valve (22) and the circulating water supply pipeline (26).

Images