Waste heat drain recovery system for saturated steam power generation

Abstract

The utility model relates to the technical field of saturated steam power generation, in particular to a saturated steam power generation waste heat drain recovery system which specifically comprises a steam-water separator drain pipe, a main steam pipeline drain pipe, a shaft seal heater drain pipe, a western region hot water pool and a western region waste water pool. The steam-water separator drain pipe comprises a main pipeline, and a steam-water separator hot water pool removal pipe and a steam-water separator wastewater pool removal pipe which are connected with the main pipeline and are respectively shunted to a western region hot water pool and a western region wastewater pool, and the main steam pipeline drain pipe is communicated to the western region hot water pool; a drain pipe of the shaft seal heater and an overflow water pipe of the water jetting tank converge and then are divided into two paths to be converged into a western region hot water pool and a western region waste water pool respectively, the system further comprises a steam-water separator expansion box connected with the main pipeline, and the output end of the steam-water separator expansion box converges into the western region hot water pool. According to the utility model, the drain water related to the saturated generator set is recycled, and the drain water with gas is discharged into the hot water pool after being released in the flash tank, so that the drain water efficiency of the set is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of saturated steam power generation technology, and in particular to a waste heat and condensate recovery system for saturated steam power generation. Background Technology

[0002] Currently, in saturated steam power generation systems, the condensate from steam separators and steam pipelines is often discharged naturally to rainwater or sewage pipes, resulting in a significant waste of water and heat resources. Steel plants have a high demand for hot water, so this condensate could be recycled and reused. Saturated steam has a high water content, and condensate drainage efficiency is crucial for the safe operation of the unit. Existing pipeline steam has fluctuating parameters, and when there is a large amount of water, the existing condensate drainage system cannot drain the water in time, resulting in a significant waste of water and heat resources.

[0003] Based on this, this utility model proposes a saturated steam power generation waste heat drainage recovery system. Utility Model Content

[0004] To solve the above technical problems, this utility model provides a saturated steam power generation waste heat condensate recovery system, which recovers and utilizes the condensate involved in the saturated generator set. After releasing the gas-laden condensate in the expansion tank, it is discharged into the hot water tank, thereby improving the condensate recovery efficiency of the unit.

[0005] The saturated steam power generation waste heat drainage recovery system in this scheme specifically includes a steam-water separator drainage pipe, a main steam pipeline drainage pipe, a shaft seal heater drainage pipe, a western hot water tank, and a western wastewater tank. The steam-water separator drainage pipe includes a main pipeline and a steam-water separator-to-hot water tank pipe and a steam-water separator-to-wastewater tank pipe connected to it and respectively branching to the western hot water tank and the western wastewater tank. The main steam pipeline drainage pipe is connected to the western hot water tank. The shaft seal heater drainage pipe and the overflow pipe of the jet tank merge and then split into two paths, flowing into the western hot water tank and the western wastewater tank respectively. The system also includes a steam-water separator expansion tank connected to the main pipeline, and the output end of the steam-water separator expansion tank flows into the western hot water tank.

[0006] The further defined technical solution of this utility model is:

[0007] Furthermore, the steam-water separator drain pipe also includes an emergency drain pipe for the steam-water separator connected to the main pipeline.

[0008] Furthermore, it also includes a cooling tower, a condensate water to hot water pool pipe connected to the condensate water source, and a condensate water to cooling tower pipe, wherein the condensate water to hot water pool pipe flows into the western hot water pool, and the condensate water to cooling tower pipe flows into the cooling tower.

[0009] Furthermore, the expansion tank of the gas-water separator is equipped with a manual valve and an electric valve at the end connected to the main pipeline.

[0010] The beneficial effects of this utility model are: the saturated steam power generation waste heat condensate recovery system provided by this utility model can recover and utilize the condensate involved in the saturated generator set, and a new condensate expansion tank is added. The gas-laden condensate is released into the hot water tank through the tap between the double valves of the steam-water separation main condensate pipeline, thereby enhancing the condensate drainage efficiency of the unit. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structural connection of the saturated steam power generation waste heat condensate recovery system in a specific embodiment of this utility model;

[0012] The components are as follows: 1. Main steam pipe drain pipe; 2. Shaft seal heater drain pipe; 3. Steam-water separator; 4. Steam-water separator expansion tank; 5. Water jet tank overflow pipe; 6. Steam-water separator to hot water pool pipe; 7. Condensate to hot water pool pipe; 8. Condensate to cooling tower pipe; 9. Steam-water separator emergency drain pipe; 10. Condenser drain pipe; 11. Steam-water separator to wastewater pool pipe; 12. West area hot water pool; 13. West area wastewater pool; 14. Cooling tower. Detailed Implementation

[0013] like Figure 1 As shown, the saturated steam power generation waste heat recovery system provided in this embodiment includes a steam-water separator drain pipe, a main steam pipeline drain pipe 1, a shaft seal heater drain pipe 2, a western hot water tank 12, and a western wastewater tank 13. The steam-water separator drain pipe includes a main pipeline and two separate pipes connected to it, which flow to the western hot water tank 12 and the western wastewater tank 13, respectively. The main steam pipeline drain pipe 1 is connected to the western hot water tank 12. The shaft seal heater drain pipe 2 merges with the overflow pipe 5 of the jet tank and then flows into the western hot water tank 12 and the western wastewater tank 13, respectively. The system also includes a steam-water separator expansion tank 4 connected to the main pipeline, and the output end of the steam-water separator expansion tank 4 flows into the western hot water tank 12. In addition, the steam-water separator drain pipe in the system also includes a steam-water separator emergency drain pipe 9 connected to the main pipeline.

[0014] In the saturated steam power generation waste heat condensate recovery system of this embodiment, there are also steam-water separators 3, cooling towers 14, condensate water to hot water pool pipes 7 and condensate water to cooling tower pipes 8 connected to the condensate water source. The condensate water to hot water pool pipes 7 flow into the western hot water pool 12, and the condensate water to cooling tower pipes 8 flow into the cooling tower 14. The steam-water separator 3 is connected to the main pipe of the steam-water separator condensate drain pipe.

[0015] See Figure 1This embodiment is a modification of the original system. Specifically, the modification involves adding a condensate expansion tank (i.e., steam-water separator expansion tank 4; specifically, the steam-water separator expansion tank 4 mentioned in this application refers to a condensate expansion tank / condensate expansion container). A tap is added after the main valve of the steam-water separator, and a new set of electric and manual valves are added to the bypass to control the condensate entering the steam-water separator expansion tank 4, ensuring that steam carryover is reduced in saturated units during startup or when steam parameters fluctuate significantly. The outlet pipe of the steam-water separator expansion tank 4 is consistent with the pipe from the steam-water separator 3 to the wastewater pool 13 in the west area. A new bypass is added to this pipe next to the wastewater pool, leading to the hot water pool 12 in the west area. When the outlet water temperature of the steam-water separator expansion tank 4 is high, it replenishes the hot water pool 12 in the west area. The red line in the diagram represents the main newly added pipe.

[0016] Tap the overflow pipe of the water jet tank next to the hot water pool 12 in the west area, and connect another line to the wastewater pool 13 in the west area. Add a set of tees and two sets of electric valves and manual valves to ensure that the overflow water can be discharged into the wastewater pool normally when the hot water pool does not need to supply water.

[0017] The drain of the unit's shaft seal heater is connected to the pipeline from the steam-water separator to the wastewater pool, which is the outlet pipeline of the steam-water separator expansion tank 4, as a supplement to the heat source of the western hot water pool 12.

[0018] The steam-water separator drain pipe leads to the West Zone Hot Water Tank 12, and is equipped with a set of electric and manual valves. An emergency waterproof drain line is installed, with an additional manual valve. One steam-water separator drain line leads to the wastewater tank, and a tee and two sets of electric and manual valves are added to the tank side to control the flow of water to the hot water tank or wastewater tank. The green line in the diagram represents the main steam-water separator drain pipe.

[0019] The condensate is divided into two routes: one to the hot water pool 12 in the west area and the other to the cooling tower 14. The condenser drain pipe 10 leads to the wastewater pool 13 in the west area. The blue line in the diagram represents the condensate pipeline. Due to the large volume of condensate, a pipeline is laid to the cooling tower 14 to recycle the condensate.

[0020] The saturated steam power generation waste heat drainage recovery system of this embodiment can introduce the main steam pipeline drainage, steam-water separator drainage, condensate, shaft seal heater drainage, and water jet tank overflow into the hot water tank for recycling. The steam-water separator wastewater and condenser blowdown drainage are discharged into the wastewater tank as wastewater. The water jet tank overflow is connected to the wastewater tank via a pipeline. Because of its low temperature, it can be discharged into the wastewater tank when the hot water tank has sufficient water.

[0021] In addition to the above embodiments, this utility model may have other implementation methods; all technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model.

Claims

1. A saturated steam power generation waste heat condensate recovery system, characterized in that, The system includes a steam-water separator drain pipe, a main steam pipe drain pipe (1), a shaft seal heater drain pipe (2), a western hot water pool (12), and a western wastewater pool (13). The steam-water separator drain pipe includes a main pipe and a steam-water separator to hot water pool pipe (6) and a steam-water separator to wastewater pool pipe (11) connected to it and respectively diverting to the western hot water pool (12) and the western wastewater pool (13). The main steam pipe drain pipe (1) is connected to the western hot water pool (12). The shaft seal heater drain pipe (2) and the water jet tank overflow pipe (5) merge and then flow into the western hot water pool (12) and the western wastewater pool (13) respectively. The system also includes a steam-water separator expansion tank (4) connected to the main pipe, and the output end of the steam-water separator expansion tank (4) flows into the western hot water pool (12).

2. The saturated steam power generation waste heat and condensate recovery system according to claim 1, characterized in that, The steam-water separator drain pipe also includes an emergency drain pipe (9) for the steam-water separator connected to the main pipe.

3. The saturated steam power generation waste heat and condensate recovery system according to claim 1, characterized in that, It also includes a cooling tower (14), a condensate-to-hot water pool pipe (7) connected to the condensate source, and a condensate-to-cooling tower pipe (8), wherein the condensate-to-hot water pool pipe (7) flows into the western hot water pool (12), and the condensate-to-cooling tower pipe (8) flows into the cooling tower (14).

4. The saturated steam power generation waste heat and condensate recovery system according to claim 1, characterized in that, The expansion tank (4) of the steam-water separator is equipped with a manual valve and an electric valve at the end connected to the main pipeline.

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