Temperature and pressure reducing device with regulating function

Abstract

The application discloses a temperature and pressure reducing device with adjusting function, which comprises a steam conveying pipeline I for receiving high-temperature and high-pressure steam, a heat exchange water tank for reducing the temperature and pressure of the steam, and a steam conveying pipeline II for outputting low-temperature and low-pressure steam, at least two steam heat exchange pipelines are fixedly communicated between the output port of the steam conveying pipeline I and the input port of the steam conveying pipeline II and are arranged in a transverse direction through the heat exchange water tank, and a steam heat exchange control valve is arranged on each steam heat exchange pipeline close to the steam conveying pipeline I; the heat exchange water tank is vertically arranged, a stirring shaft is rotatably arranged at the middle part of the bottom of the heat exchange water tank, the top of the stirring shaft is arranged in the heat exchange water tank and is fixedly provided with a stirring paddle, and the bottom of the stirring shaft is arranged outside the heat exchange water tank. The application can adjust according to the actual situation of the steam through the multi-pipeline cooperative heat exchange and the reinforced stirring design, so as to realize the steam temperature and pressure reducing treatment and high-efficiency and stable operation.

Description

Technical Field

[0001] This utility model relates to the field of power auxiliary equipment technology, and in particular to a de-cooling and de-pressure reducing device with adjustment function. Background Technology

[0002] In industrial production, steam is an important heat energy carrier. Its pressure and temperature parameters directly affect the stability of the process, equipment life and energy efficiency. For example, in power plants, after high-temperature and high-pressure steam drives the steam turbine to do work, the steam parameters need to be adjusted to the low-pressure and low-temperature state required by the heating network or process equipment through a desuperheating and pressure reducing device.

[0003] Traditional desuperheating and pressure reducing devices typically employ fixed orifice plates and direct mixing desuperheating structures, regulating steam pressure through mechanical valve openings and relying on external cooling water for temperature control. However, this design has significant drawbacks in terms of dynamic regulation performance and energy efficiency.

[0004] Firstly, the fixed throttling structure results in low pressure regulation accuracy, especially when the load fluctuates, which can easily lead to overpressure or underpressure, potentially causing pipeline vibration or thermal stress damage to equipment.

[0005] Secondly, the direct mixing desuperheating method is difficult to achieve dynamic matching between cooling water volume and steam flow. Excessive desuperheating water often leads to deterioration of steam quality (such as excessive water content), or insufficient desuperheating water can cause local overheating, threatening the safe operation of the equipment. Utility Model Content

[0006] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a de-cooling and de-pressure device with adjustment function that can be adjusted according to the actual situation of steam through multi-pipe coordinated heat exchange and enhanced stirring design, so as to achieve steam de-cooling and de-pressure treatment and efficient and stable operation.

[0007] The technical problem to be solved by this utility model is achieved through the following technical solution. This utility model is a de-temperature and pressure reducing device with regulating function, including a steam conveying pipe I for receiving high-temperature and high-pressure steam, a hot water exchange tank for de-temperature and pressure reducing steam, and a steam conveying pipe II for outputting low-temperature and low-pressure steam. At least two steam heat exchange pipes that are horizontally connected through the hot water exchange tank are fixedly connected between the output port of steam conveying pipe I and the input port of steam conveying pipe II. A steam heat exchange control valve is installed on each of the steam heat exchange pipes near the side of steam conveying pipe I.

[0008] The hot water exchange tank is vertically arranged. A cooling water inlet pipe is connected to the bottom of the hot water exchange tank, and a cooling water outlet pipe is connected to the top of the hot water exchange tank. An agitator shaft is rotatably installed in the middle of the bottom of the hot water exchange tank. The top of the agitator shaft is located inside the hot water exchange tank and a stirring paddle is fixedly installed thereon. The bottom of the agitator shaft is located outside the hot water exchange tank. A drive device is also installed on the hot water exchange tank to drive the agitator shaft to drive the stirring paddle to perform agitation operations inside the hot water exchange tank.

[0009] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the above-mentioned de-temperature and pressure reducing device with adjustment function, a connecting flange is installed on both the inlet of steam conveying pipeline I and the outlet of steam conveying pipeline II.

[0010] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the above-mentioned de-temperature and pressure reducing device with adjustment function, a pressure gauge and a temperature instrument are also installed on the steam conveying pipeline II.

[0011] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the above-mentioned de-cooling and pressure reducing device with adjustment function, a booster pump and a cooling water input regulating valve are installed on the cooling water input pipeline, and a cooling water output regulating valve is installed on the cooling water output pipeline.

[0012] The technical problem to be solved by this utility model can also be further achieved by the following technical solution: For the above-mentioned temperature reduction and pressure reduction device with adjustment function, several water inlet pipes connected to the cooling water input pipes are installed on the bottom wall of the hot water exchange tank on the side of the stirring shaft, and a water inlet check valve is installed on the water inlet pipes.

[0013] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: For the above-mentioned temperature and pressure reducing device with adjustment function, the driving device is a geared motor, the motor shaft of the geared motor is connected to the stirring shaft, and a rotary dynamic seal is installed at the junction of the stirring shaft and the hot water tank.

[0014] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the above-mentioned temperature reduction and pressure reduction device with adjustment function, heat exchange fins are fixedly installed on the steam heat exchange pipe in the hot water tank.

[0015] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the above-mentioned de-temperature and pressure reducing device with adjustment function, the steam heat exchange pipe is provided with 3-5 pipes.

[0016] The technical problem to be solved by this utility model can also be further achieved through the following technical solution: for the above-mentioned temperature reduction and pressure reduction device with adjustment function, the hot water tank is in the shape of a cuboid.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model significantly increases the heat exchange area between steam and cooling water by arranging at least two horizontally penetrating steam heat exchange pipes in parallel. At the same time, it allows for flexible opening and closing of some pipes according to actual load requirements, realizing the adjustment function and avoiding the control lag at low load or insufficient processing capacity at high load in single-pipe design.

[0019] 2. This utility model utilizes cooling water heat exchange to achieve the cooling and pressure reduction treatment of steam. The flow rate of cooling water can be adjusted through the cooling water inlet and outlet pipes as needed, thereby adjusting the heat exchange efficiency with steam to achieve the adjustment of the cooling and pressure reduction operation of steam.

[0020] 3. The stirring paddle installed in the hot water tank of this utility model can force the cooling water to circulate, break the temperature stratification phenomenon in the water tank during static heat exchange, make the heat exchange process between cooling water and steam more uniform, and avoid uneven steam cooling or overheating of the heat exchange tube wall due to insufficient local cooling. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a top view of the structure of this utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Reference Figure 1-2A de-temperature and pressure reducing device with regulating function includes a steam conveying pipe I1 for receiving high-temperature and high-pressure steam, a hot water exchange tank 2 for de-temperature and pressure reducing the steam, and a steam conveying pipe II3 for outputting low-temperature and low-pressure steam. The steam conveying pipes I1 and II3 can be made of seamless steel pipes made of high-temperature alloy steel, with an outer insulation layer to ensure stability and reliability. To facilitate connection with external equipment, connecting flanges 4 are installed at the inlet of the steam conveying pipe I1 and the outlet of the steam conveying pipe II3. The hot water exchange tank 2 is used to hold cooling water for heat exchange with the high-temperature and high-pressure steam to achieve de-temperature and pressure reducing treatment. Preferably, the hot water exchange tank 2 is rectangular in shape.

[0025] To enable heat exchange between the input high-temperature, high-pressure steam and the cooling water in the heat exchange tank 2, at least two transversely penetrating steam heat exchange pipes 5 are fixedly connected between the output port of steam delivery pipe I1 and the input port of steam delivery pipe II3. This provides multiple channels for steam delivery, allowing for steam input adjustment through different numbers of switches as needed. Preferably, the diameter of the steam heat exchange pipes 5 is the same as the diameter of the steam delivery pipe I1, so that when at least two steam heat exchange pipes 5 are opened, the steam pressure can be reduced. Preferably, there are 3-5 steam heat exchange pipes 5.

[0026] To improve heat exchange efficiency, heat exchange fins 18 are fixedly installed on the steam heat exchange pipes 5 inside the hot water tank 2. To enable on / off control of the steam conveying pipe I1, steam heat exchange control valves 6 are installed on the steam heat exchange pipes 5 on the side close to the steam conveying pipe I1.

[0027] The heat exchange tank 2 is vertically arranged. A cooling water inlet pipe 9 is connected to the bottom of the heat exchange tank 2, and a cooling water outlet pipe 12 is connected to the top of the heat exchange tank 2. Cooling water is used to input and output into the heat exchange tank 2 to reduce the temperature and pressure of the steam through heat exchange. Preferably, a booster pump 11 and a cooling water inlet regulating valve 10 are installed on the cooling water inlet pipe 9, and a cooling water outlet regulating valve 13 is installed on the cooling water outlet pipe 12. This allows the flow rate of the cooling water to be adjusted as needed through the booster pump 11, the cooling water inlet regulating valve 10, and the cooling water outlet regulating valve 13, which helps to improve the heat exchange efficiency.

[0028] A stirring shaft 14 is rotatably installed in the middle of the bottom of the hot water exchange tank 2. The top of the stirring shaft 14 is located inside the hot water exchange tank 2 and a stirring paddle 15 is fixedly installed thereon. The bottom of the stirring shaft 14 is located outside the hot water exchange tank 2. A drive device 16 is also installed on the hot water exchange tank 2 to drive the stirring shaft 14 and the stirring paddle 15 to perform stirring operations inside the hot water exchange tank 2, so as to realize the stirring operation of cooling water and help to further improve heat exchange efficiency. Preferably, the drive device 16 is a geared motor. The motor shaft of the geared motor is connected to the stirring shaft 14 through a transmission gear. A rotary dynamic seal is installed at the junction of the stirring shaft 14 and the hot water exchange tank 2.

[0029] In order to better achieve the mixing of cooling water by the stirring shaft 14 and the stirring paddle 15, so that the newly input cooling water can be mixed quickly, several water inlet pipes 17 connected to the cooling water input pipe 9 are installed on the bottom wall of the heat exchange tank 2 around the stirring shaft 14. A one-way valve for water inlet is installed on the water inlet pipe 17.

[0030] In actual use, a pressure gauge 8 and a temperature instrument 7 are also installed on the steam transmission pipeline II3 to monitor the pressure and temperature of the output steam in real time, so as to make adjustments according to the monitoring situation and actual needs, such as opening more steam heat exchange pipelines 5, opening the cooling water input regulating valve 10 and the cooling water output regulating valve 13 to increase the flow rate of cooling water, or turning on the drive device 16 to achieve the stirring treatment of cooling water.

[0031] The actual working process of the de-icing and pressure-reducing device with adjustable function provided in this application is as follows:

[0032] 1. First, connect the steam transmission pipeline I1 to the external steam release equipment (such as a steam turbine) through the connecting flange 4, connect the steam transmission pipeline II3 to the external steam application equipment (such as a heating network), and then input cooling water into the heat exchange tank 2 through the cooling water input pipeline 9;

[0033] 2. Turn on the steam input and first open a steam heat exchange pipe 5. The steam is input from the steam delivery pipe I1, and after exchanging heat with the cooling water in the hot water tank 2 through the steam heat exchange pipe 5, the steam is de-heated and de-pressurized, and then output from the steam delivery pipe II3.

[0034] 3. Real-time monitoring of the temperature and pressure of the output steam;

[0035] 4. When it is necessary to further reduce the temperature and pressure of the output steam, more steam heat exchange pipes 5 can be opened to reduce the input pressure of steam. At the same time, by cooperating with the cooling water input pipe 9 and the cooling water output pipe 12, the flow rate of cooling water in the heat exchange tank 2 can be accelerated, and the drive device 16 can be turned on to drive the stirring shaft 14 to drive the stirring paddle 15 to stir the cooling water, thereby accelerating the heat exchange efficiency between the cooling water and the steam and further de-heating and de-pressurizing the steam so that the temperature and pressure of the output steam meet the requirements.

Claims

1. A de-temperature and pressure reducing device with adjustable function, characterized in that: It includes a steam conveying pipeline I for receiving high-temperature and high-pressure steam, a hot water exchange tank for de-heating and de-pressurizing the steam, and a steam conveying pipeline II for outputting low-temperature and low-pressure steam. At least two steam heat exchange pipelines that run horizontally through the hot water exchange tank are fixedly connected between the output port of steam conveying pipeline I and the input port of steam conveying pipeline II. A steam heat exchange control valve is installed on the steam heat exchange pipelines near the side of steam conveying pipeline I. The hot water exchange tank is vertically arranged. A cooling water inlet pipe is connected to the bottom of the hot water exchange tank, and a cooling water outlet pipe is connected to the top of the hot water exchange tank. An agitator shaft is rotatably installed in the middle of the bottom of the hot water exchange tank. The top of the agitator shaft is located inside the hot water exchange tank and a stirring paddle is fixedly installed thereon. The bottom of the agitator shaft is located outside the hot water exchange tank. A drive device is also installed on the hot water exchange tank to drive the agitator shaft to drive the stirring paddle to perform agitation operations inside the hot water exchange tank.

2. The de-cooling and de-pressure reducing device with adjustment function according to claim 1, characterized in that: Connecting flanges are installed at both the inlet of steam transmission pipeline I and the outlet of steam transmission pipeline II.

3. The de-cooling and de-pressure reducing device with adjustment function according to claim 1 or 2, characterized in that: Pressure gauges and temperature instruments are also installed on steam transmission pipeline II.

4. The de-cooling and de-pressure reducing device with adjustment function according to claim 1, characterized in that: A booster pump and a cooling water inlet regulating valve are installed on the cooling water inlet pipe, and a cooling water outlet regulating valve is installed on the cooling water outlet pipe.

5. The de-cooling and de-pressure reducing device with adjustment function according to claim 1 or 4, characterized in that: Several water inlet pipes connected to the cooling water input pipes are also installed on the bottom wall of the hot water exchange tank around the agitator shaft, and one-way valves are installed on the water inlet pipes.

6. The de-cooling and de-pressure reducing device with adjustment function according to claim 1, characterized in that: The driving device is a geared motor, and the motor shaft of the geared motor is connected to the stirring shaft. A rotary dynamic seal is installed at the junction of the stirring shaft and the hot water tank.

7. The de-cooling and de-pressure reducing device with adjustment function according to claim 1, characterized in that: Heat exchange fins are fixedly installed on the steam heat exchange pipes inside the hot water tank.

8. The de-cooling and de-pressure reducing device with adjustment function according to claim 1 or 7, characterized in that: There are 3-5 steam heat exchange pipes.

9. The de-cooling and de-pressure reducing device with adjustment function according to claim 1, characterized in that: The hot water exchange tank is rectangular in shape.

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