Condensing steam turbine water seal recovery device
By installing a drainage pipeline in the steam turbine water seal system, the steam condensate at the exhaust safety valve is recovered to the boiler water system, solving the problem of resource waste in the water seal system, realizing the reuse of steam condensate, and improving economic efficiency.
Patent Information
- Application Number
- CN202423098191.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-16
AI Technical Summary
In existing technologies, the drainage from steam turbine water seal systems cannot be effectively collected and reused, resulting in resource waste.
Design a condensing steam turbine water seal recovery device, with the drain pipeline installed at the exhaust safety valve, so that all the discharged steam condensate is recovered to the pump inlet and sent to the boiler water system of the thermal power plant for use.
This enables the recycling and reuse of steam condensate, reducing resource waste and increasing economic benefits.
Smart Images
Figure CN223634760U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of steam turbine, concretely relates to a condensing steam turbine water seal recovery device. BACKGROUND
[0002] The water seal system of the steam turbine is an important sealing structure, which is composed of multiple water seal plates and corresponding sealing rings. Its main function is to form an effective sealing barrier inside and outside the steam turbine, to avoid high-pressure steam leakage to the low-pressure part, and to effectively reduce the air leakage phenomenon inside and outside the steam turbine.
[0003] The main purpose of the multiple water seals of the steam turbine is to reduce the air leakage from the high-pressure side to the low-pressure side of the steam turbine, to reduce the exhaust steam volume, and thus to improve the power, efficiency and economy of the steam turbine. The multiple water seals arranged between the high-pressure cylinder, the intermediate-pressure cylinder and the low-pressure cylinder can effectively reduce the steam leakage and the air leakage phenomenon. These operations can reduce the toxic gas concentration and improve the efficiency of the device. Under the condition of reducing the high-pressure dry steam leakage and reducing the steam volume, the power generation of the generator is also correspondingly increased.
[0004] In the prior art, the drainage in the water seal system cannot be effectively collected and reused, resulting in a large amount of waste of resources in the water seal system. Therefore, a condensing steam turbine water seal recovery device is proposed to solve the above problems. SUMMARY
[0005] In view of one or more of the above defects or improvement needs of the prior art, the utility model provides a condensing steam turbine water seal recovery device, which is designed by arranging the drainage pipeline at the exhaust safety valve, so that all the discharged is steam condensate. The steam condensate is all recovered to the pump inlet and sent to the pipe network for use as boiler water of the thermal power plant. On the one hand, it achieves emission reduction, and on the other hand, it recycles the steam condensate, increases economic benefits, and has good use value and application prospect.
[0006] To achieve the above purpose, the utility model provides a condensing steam turbine water seal recovery device, which comprises a main steam pipeline, an auxiliary steam pipeline, a steam turbine, a condenser and a condensate water pipeline assembly.
[0007] One end of the main steam pipeline is formed with a main steam inlet, and the other end is communicated to the steam turbine. One end of the auxiliary steam pipeline is formed with an auxiliary steam inlet, and the other end is also communicated to the steam turbine. Compressors are arranged on both sides of the steam turbine.
[0008] The condenser is communicated to the drainage port of the steam turbine. The condensate water pipeline assembly is connected to the condenser, and water injection pipelines and drainage pipelines for injecting and discharging water seal water are arranged on the condenser.
[0009] As a further improvement of the utility model, a quick closing valve is arranged corresponding to the main steam pipeline, and a speed regulating valve is further arranged on the main steam pipeline, which is used for controlling the flow rate of steam entering the steam turbine.
[0010] As a further improvement of the utility model, a quick closing valve is arranged corresponding to the auxiliary steam pipeline, which is used for controlling the flow rate of gas in the auxiliary steam pipeline.
[0011] As a further improvement of the utility model, a pressure regulating system is further arranged corresponding to the steam turbine, which is used for controlling the gas pressure inside the steam turbine.
[0012] As a further improvement of the utility model, the condensate water pipeline assembly comprises a first condensate water pump and a second condensate water pump, and a circulating valve and a discharge valve, the first condensate water pump and the second condensate water pump are connected to the drain port of the condenser;
[0013] The drain port of the first condensate water pump and the second condensate water pump is connected to the circulating valve, and the circulating valve and the discharge valve are communicated, and the other end of the discharge valve is provided with a condensate water outlet.
[0014] As a further improvement of the utility model, the drain port of the first condensate water pump and the second condensate water pump is further communicated to the condenser.
[0015] As a further improvement of the utility model, a steam discharge safety valve is arranged at the connecting pipeline of the first condensate water pump and the second condensate water pump and the condenser, and the drain pipeline is arranged at the connecting pipeline of the first condensate water pump and the second condensate water pump.
[0016] As a further improvement of the utility model, a shaft coupling is arranged at the connection of the steam turbine and the two compressors.
[0017] The above technical features can be combined with each other as long as they do not conflict with each other.
[0018] Overall, compared with the prior art, the above technical scheme conceived by the utility model has the beneficial effects including:
[0019] The condensing steam turbine water seal recovery device of the utility model, through the design form that the drain pipeline is arranged at the steam discharge safety valve, makes the discharged all be steam condensate. Present all recovery to the pump inlet, and send to the pipe network as the boiler water of the thermal power plant uses. On the one hand, it achieves emission reduction, on the other hand, it makes steam condensate reuse, increases economic benefits, has good use value and application prospect. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1It is the system principle diagram of the condensing steam turbine water seal recovery device in the embodiment of the utility model;
[0021] Figure 2 It is the system composition diagram of the condensing steam turbine water seal recovery device in the embodiment of the utility model; DETAILED DESCRIPTION
[0022] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is in combination with the drawings and embodiment, and the utility model is further explained in detail.
[0023] It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.
[0024] Please refer to Figure 1 And Figure 2 The condensing steam turbine water seal recovery device in the preferred embodiment of the utility model, which is discharged as steam condensate by setting the drain pipeline at the design form of the exhaust safety valve. Now all the recovery is pumped into the pump inlet and sent to the pipe network as the boiler water of the thermal power plant. On the one hand, it achieves emission reduction, and on the other hand, it makes the steam condensate reusable, increases economic benefits, has good use value and application prospect.
[0025] It includes a main steam pipeline, an auxiliary steam pipeline, a steam turbine and a condenser, and a condensate water pipeline assembly. One end of the main steam pipeline forms a main steam inlet, and the other end is connected to the steam turbine. One end of the auxiliary steam pipeline forms an auxiliary steam inlet, and the other end is also connected to the steam turbine. Compressors are arranged on both sides of the steam turbine, and a coupling is arranged at the connection between the steam turbine and the two compressors. The condenser is connected to the drain port of the steam turbine. The condensate water pipeline assembly is connected to the condenser and is provided with a water injection pipeline and a drain pipeline for injecting and discharging water seal water on the condenser. A quick closing valve is arranged corresponding to the main steam pipeline, and a speed regulating valve is also arranged on the main steam pipeline for controlling the flow rate of steam entering the steam turbine. A quick closing valve is arranged corresponding to the auxiliary steam pipeline for controlling the flow rate of gas in the auxiliary steam pipeline.
[0026] Further, in the actual use process, preferably, a pressure regulating system is further arranged corresponding to the steam turbine for controlling the gas pressure in the steam turbine.
[0027] Specifically, as Figure 2As shown in the utility model, the condensate water pipeline assembly in the preferred embodiment of the utility model comprises a first condensate water pump and a second condensate water pump, a circulating valve and a discharge valve, the first condensate water pump and the second condensate water pump are connected to a drain port of a condenser, the drain port of the first condensate water pump and the second condensate water pump is connected to the circulating valve, the circulating valve and the discharge valve are communicated, and the discharge valve is provided with a condensate water outlet at the other end.
[0028] More specifically, the drain port of the first condensate water pump and the second condensate water pump is also communicated to the condenser. A steam safety valve is arranged at the connecting pipeline of the first condensate water pump and the second condensate water pump and the condenser. The drain pipeline is arranged at the connecting pipeline of the first condensate water pump and the second condensate water pump.
[0029] The working principle of the water seal recovery device in the preferred embodiment of the utility model is as follows:
[0030] The main steam pipeline is connected to a quick closing valve from the steam turbine, and the new steam enters the flow passage of the steam turbine through the quick closing valve and a high pressure regulating valve. After the steam does work in the flow passage, the pressure is reduced to the exhaust pressure, and then the steam enters the condenser. The exhaust steam entering the condenser exchanges heat with the circulating water to generate condensate water, which is collected in the hot well. The condensate water is transported to the boiler feed water system by the condensate water pump. In order to ensure the safe and economic operation of the condenser, in addition to the liquid level indicator, a liquid level transmitter and a liquid level regulating valve are also configured. In order to prevent overpressure, a steam safety valve is arranged on the condenser. At the same time, in order to maintain the vacuum and good heat exchange effect established when the steam condenses in the condenser, the air (including uncondensed steam) leaking into the condenser is continuously extracted by an air extractor, and the steam turbine is provided with a single-stage starting air extractor and a double two-stage air extractor. The air extractors are all steam jet air extractors, and the two-stage air extractor uses the condensate water at the outlet of the condensate water pump as the cooling medium.
[0031] In order to prevent high-temperature steam from leaking into the bearing box at the front steam seal of the cylinder to cause the temperature of the bearing to rise and the lubricating oil to contain water, and to prevent air from leaking into the exhaust cylinder at the rear steam seal to cause the vacuum to deteriorate, the steam turbine adopts a closed steam seal system, mainly including an automatic steam seal pressure regulator and a pressure transmitter.
[0032] Furthermore, all the water in the water seal pipeline of the steam safety valve is discharged to a ditch and treated in a sewage plant. Since the water in the water seal pipeline of the steam safety valve comes from the outlet of the condensate water pump and is steam condensate, it is all recovered to the inlet of the pump and sent to the pipe network for use as boiler water in the thermal power plant. On the one hand, it achieves emission reduction, and on the other hand, it recycles the steam condensate and increases economic benefits.
[0033] The condensing steam turbine water seal recovery device of the utility model, through the design form of setting the drain pipeline at the steam safety valve, makes the discharged all be steam condensate. The present all is recycled to the pump inlet, and is sent to the pipe network as the boiler water of the thermal power plant. On the one hand, the emission reduction is realized, on the other hand, the steam condensate is reused, the economic benefit is increased, and the utility model has good use value and application prospect.
[0034] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A condensing steam turbine water seal recovery device, characterized by, It includes a main steam pipeline, an auxiliary steam pipeline, a steam turbine and a condenser, and a condensate pipeline assembly; Wherein, one end of the main steam pipeline is formed with a main steam inlet, and the other end is communicated to the steam turbine, one end of the auxiliary steam pipeline is formed with an auxiliary steam inlet, and the other end is also communicated to the steam turbine; and the steam turbine is provided with a compressor on both sides; The condenser is communicated to the drain port of the steam turbine; the condensate pipeline assembly is connected to the condenser, and the condenser is provided with a water injection pipeline and a water discharge pipeline for injecting and discharging seal water.
2. The condensing steam turbine water seal recovery device of claim 1, wherein, A quick closing valve is arranged corresponding to the main steam pipeline, and a speed regulating valve is also arranged on the main steam pipeline for controlling the flow rate of steam entering the steam turbine.
3. The condensing steam turbine water seal recovery device of claim 1, wherein, A quick closing valve is arranged corresponding to the auxiliary steam pipeline for controlling the flow rate of gas in the auxiliary steam pipeline.
4. The condensing steam turbine water seal recovery device of claim 1, wherein, A pressure regulating system is also arranged corresponding to the steam turbine for controlling the gas pressure inside the steam turbine.
5. The condensing steam turbine water seal recovery device of claim 1, wherein, The condensate pipeline assembly includes a first condensate pump and a second condensate pump, as well as a circulating valve and a discharge valve, the first condensate pump and the second condensate pump are connected to the drain port of the condenser; The drain port of the first condensate pump and the second condensate pump is connected to the circulating valve, and the circulating valve and the discharge valve are communicated, and the other end of the discharge valve is provided with a condensate outlet.
6. The condensing steam turbine water seal recovery device of claim 5, wherein, The drain port of the first condensate pump and the second condensate pump is also communicated to the condenser.
7. The condensing steam turbine water seal recovery device of claim 5, wherein, A steam discharge safety valve is arranged at the connecting pipeline of the first condensate pump and the second condensate pump and the condenser; and the water discharge pipeline is arranged at the connecting pipeline of the first condensate pump and the second condensate pump.
8. The condensing steam turbine water seal recovery device of any one of claims 1-6, wherein, A shaft coupling is arranged at the connection of the steam turbine and the two compressors.