Steam-water sampling frame drainage recovery device and steam turbine generator set
By installing a buffer tank and a condensate tank in the soda sampling rack, combined with a delivery pump and a deaerator, the problem of waste in soda sampling drainage is solved, and water resources are recycled and reused, and power generation costs are reduced.
Patent Information
- Application Number
- CN202520222157.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-12
AI Technical Summary
The sampling and drainage of water sampling racks in the existing technology wastes water resources, leading to increased power generation costs and decreased efficiency.
A steam and water sampling rack drainage and recovery device was designed. High-quality water samples, such as saturated steam, superheated steam, and condensate from the steam and water sampling rack, are transported to a buffer tank through pipelines and then pumped into a condensate tank by a transfer pump. Boiler wastewater is discharged into the cooling tower circulating water pool and treated by thermal and chemical deaerators to further reduce water waste.
This has resulted in water conservation, reduced power generation costs, improved power generation efficiency, and reduced the risk of boiler corrosion and scaling.
Smart Images
Figure CN223895959U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of power plant equipment, and in particular relates to a steam and water sampling rack drainage recovery device and a steam turbine generator set. Background Technology
[0002] Existing waste-to-energy plants primarily generate hot steam by heating boiler water, which then expands and performs work within a steam turbine, causing the turbine blades to rotate and drive a generator to produce electricity. To ensure the safe and efficient operation of the steam turbine generator set, the power plant's steam turbine generator set is equipped with a demineralized water treatment system. Only softened water, after being demineralized, is added to the boiler. In addition, the waste steam generated after the hot steam power generation is condensed into condensate, which has a relatively good water quality and is stored in a condensate tank as an important component of the boiler water supply.
[0003] The quality of steam and water used in steam turbine generator sets has a significant impact on their safe and efficient operation. To prevent salt accumulation, scaling, and corrosion caused by poor water quality, centralized steam and water sampling racks are typically installed. These racks collect samples of condensate, feedwater, deaerator inlet, deaerator outlet, boiler water, saturated steam, superheated steam, reheat steam, condensate, and closed-loop cooling water at high temperatures and pressures. The samples are then cooled to ambient temperature and pressure by the cooling system, and finally analyzed and evaluated using various online chemical analyzers. Subsequently, the steam and water samples are drained into the cooling tower circulating water pool to cool the generator set, or the steam and water samples are drained as wastewater. However, the boiler feedwater, saturated steam, superheated steam, and the condensate formed by their condensation have good water quality and low salt content. If the water samples from the boiler feedwater, saturated steam, superheated steam, and condensate are directly discharged into the cooling tower circulating water pool, it will waste water resources, fail to save demineralized water, be detrimental to reducing energy consumption, increase power generation costs, and cause a decline in the efficiency of the power plant. Therefore, the drainage of the steam and water sampling rack needs to be modified. Utility Model Content
[0004] In view of this, this application provides a steam and water sampling rack drainage recovery device and a steam turbine generator set to solve the technical problem of water waste caused by the sampling drainage of steam and water sampling racks in the prior art.
[0005] The first aspect of this application provides a steam sampling rack drainage recovery device, including a steam sampling rack, a cooling tower circulating water pool, a buffer water tank, a transfer pump, and a condensate tank;
[0006] The saturated steam sampling point, superheated steam sampling point, and condensate sampling point in the steam and water sampling rack are connected to the buffer water tank through pipes.
[0007] The inlet of the delivery pump is connected to the buffer tank via a pipe, and the outlet of the delivery pump is connected to the condensate tank via a pipe.
[0008] The boiler wastewater sampling point in the steam and water sampling rack is connected to the cooling tower circulating water pool via a pipe.
[0009] Preferably, the soda sampling rack further includes a deaerator outlet sampling point, which is connected to the buffer tank via a pipe.
[0010] Preferably, the soda sampling rack further includes a deaerator inlet sampling point, which is connected to the buffer tank via a deaerator inlet drain pipe;
[0011] The first deaerator is installed in the inlet drainage pipe of the deaerator.
[0012] Preferably, the soda sampling rack further includes a water sampling point, which is connected to the buffer tank via a water supply and drainage pipe;
[0013] A second deaerator is installed in the water supply and drainage pipeline.
[0014] Preferably, both the first deaerator and the second deaerator are selected from thermal deaerators.
[0015] Preferably, the thermal deaerator is selected from a vacuum deaerator, a high-pressure deaerator, or a high-pressure deaerator.
[0016] Preferably, both the first deaerator and the second deaerator are selected from chemical deaerators.
[0017] Preferably, the chemical deaerator is selected from a hydrazine deaerator dosing system.
[0018] Preferably, both the first deaerator and the second deaerator are selected from a combination of thermal deaerator and chemical deaerator.
[0019] The second aspect of this application provides a steam turbine generator set, including the steam-water sampling rack drainage recovery device described in the first aspect.
[0020] Compared with the prior art, the steam sampling rack drainage recovery device and steam turbine generator set provided in this application have at least the following beneficial effects:
[0021] 1. The steam and water sampling rack drainage recovery device provided in this application can recover the saturated steam and superheated steam with good water quality and the condensate produced after condensation in the steam and water sampling rack, thereby saving demineralized water and reducing the waste of water resources.
[0022] 2. The water sampling rack drainage recovery device provided in this application can recover the water sampling drainage and deaerator inlet sampling drainage in the water sampling rack by setting up a thermal deaerator and a chemical deaerator, thereby further reducing the waste of water resources.
[0023] 3. The steam turbine generator set provided in this application uses less water, which helps to reduce power generation costs and improve power generation efficiency. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0025] Figure 1 A schematic diagram of the existing boiler steam and water sampling and drainage structure;
[0026] Figure 2 This is a schematic diagram of the structure of a water sampling rack drainage recovery device provided in Embodiment 1 of this application;
[0027] Figure 3 This is a schematic diagram of the structure of a water sampling rack drainage recovery device provided in Embodiment 2 of this application;
[0028] Figure 4 This is a schematic diagram of the structure of a water sampling rack drainage recovery device provided in Embodiment 3 or 4 of this application;
[0029] The attached diagram is labeled as follows: 1-Steam and water sampling rack, 2-Saturated steam sampling point, 3-Superheated steam sampling point, 4-Condensate sampling point, 5-Deaerator outlet sampling point, 6-Deaerator inlet sampling point, 7-Feed water sampling point, 8-Boiler wastewater sampling point, 9-Cooling tower circulating water pool, 10-Buffer water tank, 11-Transfer pump, 12-Drain tank, 13-First deaerator, 14-Second deaerator. Detailed Implementation
[0030] In view of this, this application provides a steam and water sampling rack drainage recovery device and a steam turbine generator set to solve the technical problem of water waste caused by the sampling drainage of steam and water sampling racks in the prior art.
[0031] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0032] Example 1
[0033] Embodiment 1 of this application provides a water sampling rack drainage recovery device, the structure of which is as follows: Figure 2 As shown, the system includes a steam and water sampling rack 1, a cooling tower circulating water pool 9, a buffer water tank 10, a transfer pump 11, and a condensate tank 12. The connections are as follows: the saturated steam sampling point 2, the superheated steam sampling point 3, and the condensate sampling point 4 in the steam and water sampling rack are connected to the buffer water tank through pipes. The inlet of the transfer pump is connected to the buffer water tank through a pipe, and the outlet of the transfer pump is connected to the condensate tank through a pipe. This system is used to pump the saturated steam sampling drainage, superheated steam sampling drainage, and condensate sampling drainage into the condensate tank. At the same time, the boiler wastewater sampling point 8 in the steam and water sampling rack is connected to the cooling tower circulating water pool through a pipe. This system is used to input the boiler wastewater sampling drainage into the cooling tower circulating water pool.
[0034] Existing conventional centralized soft drink sampling racks have the following structure: Figure 1 As shown, after sampling and testing multiple water samples, including condensate, feedwater, deaerator inlet, deaerator outlet, boiler water, saturated steam, and superheated steam, the sampled wastewater is either used as cooling water in the cooling tower circulating water pool or as wastewater. Existing steam-water sampling racks do not effectively recycle and utilize the better-quality water samples from the wastewater, resulting in wasted water resources. However, the steam-water sampling rack wastewater recovery device provided in Embodiment 1 connects the saturated steam sampling point, superheated steam sampling point, and condensate sampling point in the steam-water sampling rack to a buffer tank via pipelines. The inlet of the delivery pump is connected to the buffer tank, and the outlet of the delivery pump is connected to a condensate tank. This allows the saturated steam sampling wastewater, superheated steam sampling wastewater, and condensate sampling wastewater to be input into the buffer tank and further transported to the condensate tank by the delivery pump. Furthermore, the steam-water sampling... The boiler wastewater sampling point in the rack is connected to the cooling tower circulating water pool via a pipeline. This is used to input the boiler wastewater sampling and drainage into the cooling tower circulating water pool. As the operating time increases, the salt content in the boiler water increases, and calcium and magnesium flocculent precipitates may even form and adhere to the inner wall of the boiler. By discharging the boiler wastewater into the cooling tower circulating water pool, the salt content of the boiler water can be reduced. Since the water quality of saturated steam, superheated steam, and the condensate produced after condensation is relatively good, the saturated steam sampling drainage, superheated steam sampling drainage, and condensate sampling drainage recovered by the steam and water sampling rack in this application are also of good quality. Therefore, they can be used as boiler water, thereby saving demineralized water, reducing energy consumption, reducing power generation costs, and improving the power generation efficiency of the steam turbine generator set. This overcomes the current defect of wasting water resources in the sampling drainage of steam and water sampling racks.
[0035] Example 2
[0036] Embodiment 2 of this application provides a water sampling rack drainage recovery device, the structure of which is as follows: Figure 3As shown, the system includes a steam-water sampling rack 1, a cooling tower circulating water pool 9, a buffer water tank 10, a transfer pump 11, and a condensate tank 12. The connections are as follows: saturated steam sampling point 2, superheated steam sampling point 3, condensate sampling point 4, and deaerator outlet sampling point 5 in the steam-water sampling rack are connected to the buffer water tank via pipes. The inlet of the transfer pump is connected to the buffer water tank via a pipe, and the outlet of the transfer pump is connected to the condensate tank via a pipe. This system is used to pump saturated steam sampling drainage, superheated steam sampling drainage, condensate sampling drainage, and deaerator outlet sampling drainage into the condensate tank. Simultaneously, boiler wastewater sampling point 8 in the steam-water sampling rack is connected to the cooling tower circulating water pool via a pipe, used to input boiler wastewater sampling drainage into the cooling tower circulating water pool.
[0037] In addition to requirements on salinity, boiler water also has requirements on oxygen content. Oxygen is a very reactive gas that can directly combine with most metals. When it combines with metals, it often forms precipitates or stable compounds. These oxides no longer combine with metals. Dissolved oxygen in water can also easily cause boiler corrosion. Because the water sampled from the deaerator outlet has been treated by the deaerator, the oxygen content is low. It can be discharged into the condensate tank as boiler water, thereby reducing energy consumption, lowering power generation costs, and improving the power generation efficiency of the steam turbine generator set.
[0038] Example 3
[0039] Embodiment 3 of this application provides a water sampling rack drainage recovery device, the structure of which is as follows: Figure 4 As shown, the system includes a steam-water sampling rack 1, a cooling tower circulating water pool 9, a buffer water tank 10, a transfer pump 11, a condensate tank 12, a first deaerator 13, and a second deaerator 14. Both the first and second deaerators are vacuum deaerators. The connections are as follows: saturated steam sampling point 2, superheated steam sampling point 3, condensate sampling point 4, deaerator outlet sampling point 5, deaerator inlet sampling point 6, and feedwater sampling point 7 in the steam-water sampling rack are connected to the buffer water tank via pipelines. The inlet of the transfer pump is connected to the buffer water tank via a pipeline, and the outlet of the transfer pump is connected to the condensate tank via a pipeline. The system connects the saturated steam sampling drainage, superheated steam sampling drainage, condensate sampling drainage, and deaerator outlet sampling drainage into the condensate tank. Simultaneously, the deaerator inlet sampling point is connected to the buffer tank via the deaerator inlet drainage pipe, and the feedwater sampling point is connected to the buffer tank via the feedwater drainage pipe. A first deaerator is installed in the deaerator inlet drainage pipe, and a second deaerator is installed in the feedwater drainage pipe. Meanwhile, the boiler wastewater sampling point 8 in the steam-water sampling rack is connected to the cooling tower circulating water pool via a pipe, used to input boiler wastewater sampling drainage into the cooling tower circulating water pool.
[0040] In this embodiment 3, since a first deaerator is installed in the deaerator inlet drainage pipe and a second deaerator is installed in the feedwater drainage pipe, the deaerator inlet sampling drainage and feedwater sampling drainage are transported to the buffer tank and pumped into the condensate tank only after the dissolved oxygen in the water is removed by the first and second deaerators. As a result, when used as boiler water, it not only makes it difficult to cause boiler corrosion, but also reduces energy consumption, thereby reducing power generation costs and improving the power generation efficiency of the steam turbine generator set.
[0041] Example 4
[0042] Embodiment 4 of this application provides a water sampling rack drainage recovery device, the structure of which is as follows: Figure 4 As shown, it includes a steam sampling rack 1, a cooling tower circulating water pool 9, a buffer water tank 10, a transfer pump 11, a condensate tank 12, a first deaerator 13, and a second deaerator 14. Both the first and second deaerators are selected as hydrazine deaerators.
[0043] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A water sampling rack drainage recovery device, characterized in that, It includes a steam sampling rack, a cooling tower circulating water pool, a buffer water tank, a transfer pump, and a condensate drain tank; The saturated steam sampling point, superheated steam sampling point, and condensate sampling point in the steam and water sampling rack are connected to the buffer water tank through pipes. The inlet of the delivery pump is connected to the buffer tank via a pipe, and the outlet of the delivery pump is connected to the condensate tank via a pipe. The boiler wastewater sampling point in the steam and water sampling rack is connected to the cooling tower circulating water pool via a pipe.
2. The water sampling rack drainage recovery device according to claim 1, characterized in that, The soda sampling rack also includes a deaerator outlet sampling point, which is connected to the buffer water tank via a pipe.
3. The water drainage recovery device for a soda sampling rack according to claim 1, characterized in that, The soda sampling rack also includes a deaerator inlet sampling point, which is connected to the buffer tank via a deaerator inlet drain pipe. The first deaerator is installed in the inlet drainage pipe of the deaerator.
4. The water sampling rack drainage recovery device according to claim 3, characterized in that, The soda sampling rack also includes a water sampling point, which is connected to the buffer water tank via a water supply and drainage pipe. A second deaerator is installed in the water supply and drainage pipeline.
5. The water sampling rack drainage recovery device according to claim 4, characterized in that, Both the first deaerator and the second deaerator are selected from thermal deaerators.
6. The water drainage recovery device for a soda sampling rack according to claim 5, characterized in that, The thermal deaerator is selected from vacuum deaerators, high-pressure deaerators, or high-pressure deaerators.
7. The water sampling rack drainage recovery device according to claim 4, characterized in that, Both the first deaerator and the second deaerator are selected from chemical deaerators.
8. The water sampling rack drainage recovery device according to claim 7, characterized in that, The chemical deoxygenator is selected from the hydrazine deoxygenation dosing system.
9. A water sampling rack drainage recovery device according to claim 4, characterized in that, Both the first deaerator and the second deaerator are selected from a combination of thermal deaerator and chemical deaerator.
10. A steam turbine generator set, characterized in that, Includes a water sampling rack drainage recovery device as described in any one of claims 1-9.