A turbine anti-icing oil temperature control system

Abstract

The utility model provides a kind of turbine anti-combustion oil temperature control system, belong to turbine anti-combustion oil technical field, including heat source container;Heat source container is connected with high-temperature input pipeline and low-temperature input pipeline in the end away from anti-combustion oil cooler, high-temperature input pipeline is connected with the sampling pipe A of low-temperature coal-saving steam condensate water inlet pipe, and low-temperature input pipeline is connected with the sampling pipe B of low-temperature coal-saving steam condensate water return pipe;The other end of heat source container is connected with mixed output pipeline, and mixed output pipeline is connected with the cooling water inlet pipe of anti-combustion oil cooler.The utility model is by using the high, low-temperature water source of low-temperature coal-saving steam condensate water in field, anti-combustion oil cooler is converted into heater by accurate temperature control, can effectively solve the problem of low temperature under anti-combustion oil low temperature, low cost and temperature control accurate, guarantee unit start and stable operation, suitable for promotion.

Description

Technical Field

[0001] The utility model relates to the technical field of turbine fire-resistant oil, in particular to a turbine fire-resistant oil temperature control system. Background Art

[0002] The high-pressure fire-resistant oil system matched with the steam turbine has strict requirements on oil temperature, which needs to be stably controlled in the range of 35℃ to 55℃. This range can ensure the viscosity, oxidation resistance and system response performance of the fire-resistant oil, and avoid oil quality degradation or system failure caused by abnormal oil temperature.

[0003] Under high-temperature working conditions in summer, the ambient temperature of the steam turbine plant often reaches 40℃, and the operation of the external oil filter will additionally increase the oil temperature by 3-5℃, which easily causes the fire-resistant oil temperature to exceed the upper limit of 55℃, leading to oil quality degradation and system corrosion; although in the prior art, for example, the Chinese patent with the authorized announcement number CN2221844864U discloses a cooling structure for high-pressure fire-resistant oil, which combines the circulating cooling of the external oil filter with dry air injection to alleviate the problems of insufficient cooling at high temperature and water ingress into the oil tank, this structure is only aimed at high-temperature scenarios and does not involve oil temperature control in low-temperature environments.

[0004] In winter or low-temperature environments, the temperature of the fire-resistant oil after the unit is shut down is easy to drop below 20℃, and the viscosity of the oil increases significantly, resulting in difficulty in oil suction of the oil pump, motor overload, and increased system pressure loss, which not only affects the system response speed, but also hinders the normal start-up of the unit and threatens the safe and stable operation of the generator set.

[0005] At the present stage, traditional methods are still adopted to solve the low-temperature problem, such as wrapping quilts and thermal insulation materials outside the fire-resistant oil tank, or using external heating fans and heating plates for heating, which have the defects of low heating efficiency and poor temperature control accuracy, and the external heating devices also have potential safety hazards. Therefore, there is a lack of a device in the industry that can utilize the existing on-site pipeline resources, realize cold and heat conversion and achieve precise temperature control, and it is difficult to meet the stable control requirements of the unit for the fire-resistant oil temperature under different ambient temperatures. Contents of the Utility Model

[0006] The purpose of the utility model is to overcome the deficiencies in the prior art that there is a lack of cold and heat conversion and the temperature control accuracy is poor, and to provide a turbine fire-resistant oil temperature control system.

[0007] This utility model is achieved through the following technical solution: a turbine fire-resistant oil temperature control system, comprising a heat source container; one end of the heat source container away from the fire-resistant oil cooler is connected to a high-temperature input pipeline and a low-temperature input pipeline, the high-temperature input pipeline is connected to a sampling pipe A of the low-temperature economizing steam condensate inlet pipe, and the low-temperature input pipeline is connected to a sampling pipe B of the low-temperature economizing steam condensate return pipe; the other end of the heat source container is connected to a mixing output pipeline, and the mixing output pipeline is connected to the cooling water inlet pipe of the fire-resistant oil cooler.

[0008] This system significantly improves the mixing uniformity of high and low temperature water in the heat source container through the above connection method, prevents fluctuations in the heating efficiency of the fire-resistant oil cooler due to excessive local temperature differences in the mixed water, ensures a uniform rise in oil temperature in the fire-resistant oil tank, avoids excessively high or low local oil temperatures affecting the performance of the fire-resistant oil, and further improves the operational stability of the fire-resistant oil system.

[0009] A further improvement of this utility model is that the low-temperature input pipeline is connected to the end of the heat source container, and the high-temperature input pipeline is connected to the side of the heat source container near the low-temperature input pipeline.

[0010] A further improvement of this utility model is that the heat source container is provided with a reducing joint A and a reducing joint B at both ends, the reducing joint A being connected to the low temperature input pipeline and the reducing joint B being connected to the mixing output pipeline.

[0011] A further improvement of this utility model is that the diameter of the heat source container is 65mm, and the diameters of the high-temperature input pipeline, the low-temperature input pipeline, and the mixed output pipeline are 15mm.

[0012] A further improvement of this utility model is that flow regulating valves are provided at the high temperature input pipeline, the low temperature input pipeline and the mixed output pipeline.

[0013] A further improvement of this utility model is that the water temperature inside the sampling tube A is 90-100℃, and the water temperature inside the sampling tube B is 40-50℃.

[0014] A further improvement of this invention is that a temperature gauge is provided on the heat source container.

[0015] A further improvement of this utility model is that the heat source container is made of 304 stainless steel tubing.

[0016] As can be seen from the above technical solutions, the beneficial effects of this utility model are: 1. This system does not require an additional independent heat source. It directly uses the high and low temperature water from the on-site low-temperature economizing steam condensate inlet pipe sampling pipe A and return pipe sampling pipe B as heat sources. Compared with traditional methods such as wrapping with insulation materials and using external heating fans, which are inefficient and pose safety hazards, this system can quickly raise the temperature of fire-resistant oil to a reasonable range, effectively solving the problems of oil pump difficulty in oil suction and motor overload caused by increased oil viscosity, and ensuring normal start-up of the unit.

[0017] 2. This system, through a variable-diameter design of the heat source container, real-time monitoring of flow regulating valves and thermometers in each pipeline, can precisely adjust the mixing ratio of high and low temperature water to control the water temperature. It flexibly converts the fire-resistant oil cooler into a heater, overcoming the limitations of existing technologies that only target high-temperature cooling. This avoids both excessively high mixed water temperatures leading to fire-resistant oil degradation and excessively low water temperatures causing insufficient heating, ensuring the fire-resistant oil temperature remains stable within the required range. This significantly improves the system's adaptability to low-temperature conditions and the accuracy of temperature control.

[0018] 3. This system uses locally sourced stainless steel pipes to construct the heat source container, which is then fitted with reducing couplings to adapt to existing pipelines. No modifications to existing facilities are required, significantly reducing installation and procurement costs. The corrosion-resistant stainless steel extends the device's lifespan and reduces maintenance frequency. Stable heating and temperature control ensure long-term fire resistance and the safe and stable operation of the generator set, balancing system reliability and economy. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0021] In the diagram: 1. Heat source container; 2. High temperature input pipeline; 3. Sampling tube A; 4. Low temperature input pipeline; 5. Sampling tube B; 6. Mixed output pipeline; 7. Cooling water inlet pipe; 8. Flow regulating valve; 9. Thermometer; 10. Reducer A; 11. Reducer B. Detailed Implementation

[0022] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0023] Now refer to Figure 1 The following is a description of a specific embodiment: The turbine fire-resistant oil temperature control system of this utility model includes a heat source container 1; one end of the heat source container 1 away from the fire-resistant oil cooler is connected to a high-temperature input pipe 2 and a low-temperature input pipe 4, the high-temperature input pipe 2 is connected to a sampling pipe A3 of the low-temperature economizing steam condensate inlet pipe, and the low-temperature input pipe 4 is connected to a sampling pipe B5 of the low-temperature economizing steam condensate return pipe; the other end of the heat source container 1 is connected to a mixing output pipe 6, and the mixing output pipe 6 is connected to a cooling water inlet pipe 7 of the fire-resistant oil cooler.

[0024] In this system, the heat source container 1 serves as the core mixing component. Its end furthest from the fire-resistant oil cooler is connected to the sampling pipe A3 of the low-temperature economizer condensate inlet pipe via the high-temperature input pipe 2, and to the sampling pipe B5 of the low-temperature economizer condensate return pipe via the low-temperature input pipe 4. This allows the high-temperature water in the sampling pipe A3 and the low-temperature water in the sampling pipe B5 to enter the heat source container 1 and mix. The mixed water is then transported to the cooling water inlet pipe 7 of the fire-resistant oil cooler via the mixing output pipe 6 at the other end of the heat source container 1, thus converting the fire-resistant oil cooler from a cooling function to a heating function to heat the fire-resistant oil in the fire-resistant oil tank.

[0025] This system can utilize the existing high and low temperature water sources in the low temperature economizing steam condensate pipeline on site, without the need for additional independent heat sources. It can effectively solve the problem of the fire-resistant oil temperature dropping below 20°C after the unit is shut down in winter or low temperature environments, and raise the fire-resistant oil temperature to a reasonable range. This avoids problems such as difficulty in oil pump suction and motor overload caused by increased oil viscosity, ensuring normal start-up of the unit and safe and stable operation of the generator set.

[0026] Specifically, the low-temperature input pipe 4 is connected to the end of the heat source container 1, and the high-temperature input pipe 2 is connected to the side of the heat source container 1 near the low-temperature input pipe 4.

[0027] The low-temperature input pipe 4 is connected to the end of the heat source container 1, and the high-temperature input pipe 2 is connected to the side of the heat source container 1 near the low-temperature input pipe 4. When the high-temperature water from the sampling pipe A3 and the low-temperature water from the sampling pipe B5 enter the heat source container 1 through their respective pipes, the high-temperature water can quickly form a preliminary mixture with the low-temperature water input at the end in the heat source container 1. Then, as the water flows to the other end of the heat source container 1, it is further fully mixed to avoid uneven local water temperature. The water that is evenly mixed is then transported to the fire-resistant oil cooler through the mixing output pipe 6.

[0028] This system significantly improves the mixing uniformity of high and low temperature water in the heat source container 1 through the above connection method, prevents fluctuations in the heating efficiency of the fire-resistant oil cooler due to excessive local temperature differences in the mixed water, ensures a uniform rise in oil temperature in the fire-resistant oil tank, avoids excessively high or low local oil temperatures affecting the performance of the fire-resistant oil, and further improves the operational stability of the fire-resistant oil system.

[0029] Specifically, flow regulating valves 8 are installed at the high-temperature input pipeline 2, the low-temperature input pipeline 4, and the mixed output pipeline 6; the water temperature inside the sampling tube A3 is 90-100℃, and the water temperature inside the sampling tube B5 is 40-50℃; the flow regulating valve 8 is a manual valve or a solenoid valve, and the mixed water temperature inside the heat source container 1 can be controlled by the flow regulating valve 8.

[0030] The flow regulating valves 8 at the high-temperature input pipeline 2, the low-temperature input pipeline 4, and the mixed output pipeline 6 can control the water flow rate of each pipeline respectively. By adjusting the opening of the flow regulating valves 8 at the high-temperature input pipeline 2 and the low-temperature input pipeline 4, the ratio of 90-100℃ high-temperature water to 40-50℃ low-temperature water entering the heat source container 1 can be changed, thereby controlling the temperature of the mixed water inside the heat source container 1. The flow regulating valve 8 at the mixed output pipeline 6 can adjust the speed at which the mixed water is delivered to the fire-resistant oil cooler, and together with temperature monitoring, ensure a stable heating rate of the fire-resistant oil.

[0031] This system achieves precise control of the mixed water temperature through the design of the aforementioned flow regulating valve 8. The manual or electromagnetic control mode can adapt to different on-site operation requirements, and can stably control the mixed water temperature within the range suitable for heating fire-resistant oil. This avoids the fire-resistant oil from overheating and deteriorating due to excessively high mixed water temperature or from insufficient heating efficiency due to excessively low mixed water temperature, ensuring that the fire-resistant oil temperature is stable at 30-50℃, and improving the flexibility and accuracy of the temperature control of the fire-resistant oil system.

[0032] Specifically, a thermometer 9 is installed on the heat source container 1. The thermometer 9 can monitor the temperature of the mixed water inside the container in real time. The operator or control system can adjust the opening of the flow regulating valve 8 at the high-temperature input pipeline 2 and the low-temperature input pipeline 4 in a timely manner according to the value displayed by the thermometer 9. When the thermometer 9 shows that the mixed water temperature has reached the target value suitable for heating fire-resistant oil, the opening of the flow regulating valve 8 is kept stable; if the water temperature deviates from the target value, the pipeline flow can be quickly adjusted to bring the mixed water temperature back to a reasonable range.

[0033] The system, through the design of temperature gauge 9, provides an intuitive basis for real-time monitoring of mixed water temperature control, avoiding blind adjustments due to the inability to grasp the mixed water temperature, preventing fluctuations in fire-resistant oil temperature caused by deviations in the input water temperature of the fire-resistant oil cooler, ensuring that the fire-resistant oil temperature is always stable at 30-50℃, reducing the risk of oil quality deterioration caused by abnormal oil temperature, and ensuring the safety of unit start-up and operation.

[0034] In one embodiment, the heat source container 1 is provided with a reducing connector A10 and a reducing connector B11 at its two ends, respectively. The reducing connector A10 is connected to the low-temperature input pipeline 4, and the reducing connector B11 is connected to the mixing output pipeline 6. The diameter of the heat source container 1 is 65 mm, and the diameters of the high-temperature input pipeline 2, the low-temperature input pipeline 4, and the mixing output pipeline 6 are all 15 mm. The reducing connectors A10 and B11 enable the ends of the heat source container 1 to be adapted to the low-temperature input pipeline 4 and the mixing output pipeline 6.

[0035] The heat source container 1 has a diameter of 65mm, and the high temperature input pipe 2, low temperature input pipe 4, and mixing output pipe 6 all have a diameter of 15mm. By setting reducer joints A10 and B11 at both ends of the heat source container 1, the ends of the heat source container 1 can be precisely adapted to the diameters of the low temperature input pipe 4 and the mixing output pipe 6. The reducer joints can guide the high and low temperature water to smoothly enter the larger diameter heat source container 1, providing sufficient mixing space for the high and low temperature water, while ensuring that the mixed water is stably delivered to the cooling water inlet pipe 7 of the fire-resistant oil cooler.

[0036] This system solves the problem of mismatch between the heat source container 1 and the diameter of each pipeline by using the above-mentioned reducing joint design. It eliminates the need to modify the existing pipelines, enabling on-site installation and reducing the difficulty and cost of device installation. Furthermore, the 65mm diameter heat source container ensures thorough mixing of high and low temperature water, while the 15mm diameter pipelines can stably control the water flow rate, avoiding insufficient mixing due to excessive water flow. This ensures stable heating temperature of subsequent fire-resistant oil and improves the reliability of system temperature control.

[0037] In one embodiment, the heat source container 1 is made of 304 stainless steel tubing to facilitate the availability of locally sourced materials. 304 stainless steel has excellent corrosion resistance and structural stability, preventing damage to the container due to water corrosion when in contact with low-temperature economizer condensate—which contains certain impurities. Furthermore, stainless steel tubing is readily available on-site and can be cut and welded to fit the required dimensions of the heat source container 1, ensuring the device can quickly adapt to the on-site installation environment and be put into use.

[0038] The use of stainless steel not only enables the use of local materials and reduces the cost of equipment manufacturing and procurement, but also effectively extends the service life of heat source container 1, reduces system downtime and maintenance caused by container corrosion damage, ensures long-term stable support for fire-resistant oil heating, and further improves the long-term reliability and economy of the system.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steam turbine fire-resistant oil temperature control system, comprising a heat source container (1), characterized in that, The heat source container (1) is connected to a high-temperature input pipe (2) and a low-temperature input pipe (4) at one end away from the fire-resistant oil cooler. The high-temperature input pipe (2) is connected to the sampling pipe A (3) of the low-temperature economizer condensate inlet pipe, and the low-temperature input pipe (4) is connected to the sampling pipe B (5) of the low-temperature economizer condensate return pipe. The other end of the heat source container (1) is connected to a mixing output pipe (6), which is connected to the cooling water inlet pipe (7) of the fire-resistant oil cooler.

2. The turbine fire-resistant oil temperature control system according to claim 1, characterized in that, The low-temperature input pipe (4) is connected to the end of the heat source container (1), and the high-temperature input pipe (2) is connected to the side of the heat source container (1) near the low-temperature input pipe (4).

3. The turbine fire-resistant oil temperature control system according to claim 2, characterized in that, The heat source container (1) is provided with a reducing connector A (10) and a reducing connector B (11) at both ends. The reducing connector A (10) is connected to the low temperature input pipeline (4), and the reducing connector B (11) is connected to the mixed output pipeline (6).

4. The turbine fire-resistant oil temperature control system according to claim 3, characterized in that, The diameter of the heat source container (1) is 65 mm, the diameter of the high temperature input pipe (2) and the low temperature input pipe (4) is 25 mm, and the diameter of the mixed output pipe (6) is 15 mm.

5. A turbine fire-resistant oil temperature control system according to claim 1, characterized in that, Flow regulating valves (8) are installed at the high temperature input pipeline (2), the low temperature input pipeline (4) and the mixed output pipeline (6).

6. The turbine fire-resistant oil temperature control system according to claim 5, characterized in that, The water temperature inside the sampling tube A (3) is 90-100℃, and the water temperature inside the sampling tube B (5) is 40-50℃.

7. A turbine fire-resistant oil temperature control system according to claim 1, characterized in that, A thermometer (9) is installed on the heat source container (1).

8. A turbine fire-resistant oil temperature control system according to claim 1, characterized in that, The heat source container (1) is made of 304 stainless steel tubing.

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