Water spraying temperature reduction device in low-pressure cylinder zero-output operation mode

Abstract

The utility model discloses a water-spraying temperature-reducing device in a low-pressure cylinder zero-output operation mode, which is arranged on a connecting pipeline between a condensed water pipeline and a low-pressure cylinder water-spraying branch pipeline, and the connecting pipeline is sequentially provided with a stop valve A, a flow meter, an electromagnetic valve and an electric control valve in the direction from the condensed water pipeline to the low-pressure cylinder water-spraying pipeline. Two ends of the stop valve A are connected in parallel with a pipeline booster pump A and a pipeline booster pump B; according to the utility model, the power consumption of the condensate pump and the operation amount of personnel in the zero-output operation mode of the pressure cylinder can be effectively reduced, and meanwhile, two pipeline booster pumps are additionally arranged and have an interlocking automatic start-stop function, so that the safety of the last-stage blade of the low-pressure cylinder in the zero-output operation mode of the pressure cylinder is improved; the zero-output running mode of the low-pressure cylinder and the running pressure and flow of a water spraying system of the low-pressure cylinder are not changed.

Description

Technical Field

[0001] This utility model relates to a low-pressure cylinder de-cooling device, specifically a water spray de-cooling device for a low-pressure cylinder operating in zero-output mode. Background Technology

[0002] In recent years, in order to promote air pollution prevention and control and improve energy efficiency, many cities in the northwest have adopted centralized heating. Thermal power units have adopted low-pressure cylinder zero-output technology to improve the thermal power production capacity of the units, while enhancing the peak-shaving capacity during the heating season, effectively alleviating the demand of urban areas for heating networks.

[0003] The ideal state for safe and economical operation of the condensate pump is as follows: under the condition of zero output of the unit's low-pressure cylinder, the deaerator water inlet valve is fully open, the condensate pump recirculation valve remains closed, and the condensate flow rate is regulated by the condensate pump frequency converter throughout the entire process. When the condensate flow rate or condensate pressure is too low, theoretically, the safe operation requirements of the condensate pump can be met by opening the condensate recirculation valve and partially closing the deaerator water inlet valve.

[0004] However, in actual operation, due to the low flow rate of condensate to deaerator under the zero-output operation condition of the low-pressure cylinder, the opening of the water inlet valve is low. At the same time, in order to meet the cooling demand of the low-pressure cylinder spray water, the outlet water pressure of the condensate pump is relatively high, resulting in certain economic losses for the condensate pump.

[0005] Therefore, a safe and economical water spray desuperheating system device for low-pressure cylinder zero-output operation mode urgently needs to be studied. Utility Model Content

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a water spray desuperheating device for low-pressure cylinder zero-output operation mode, which is installed on the connecting pipeline between the condensate pipeline and the water spray branch pipeline of the low-pressure cylinder. The connecting pipeline is provided with a shut-off valve A, a flow meter, a solenoid valve and an electric regulating valve in sequence from the condensate pipeline to the water spray pipeline of the low-pressure cylinder. A pipeline booster pump A and a pipeline booster pump B are connected in parallel at both ends of the shut-off valve A.

[0007] Furthermore, one end of the pipeline booster pump A is connected to the pipeline between the condensate pipeline and the shut-off valve A, and the other end is connected to the pipeline between the shut-off valve A and the flow meter through the check valve, the shut-off valve B, and the shut-off valve A.

[0008] Furthermore, both ends of the pipeline booster pump B are connected to both ends of the pipeline booster pump A, respectively.

[0009] The advantages of this utility model compared with the prior art are as follows: This utility model can effectively reduce the power consumption and personnel operation of the condensate pump in the zero-output operation mode of the pressure cylinder, and at the same time add two pipeline booster pumps (one for use and one for standby) with interlocking automatic start and stop function to improve the safety of the last stage blade of the low-pressure cylinder in the zero-output operation mode of the pressure cylinder; This utility model does not change the zero-output operation mode of the low-pressure cylinder, the operating pressure and flow of the low-pressure cylinder spray system. Attached Figure Description

[0010] Figure 1 This is a connection diagram of the water spray desuperheating device in the low-pressure cylinder zero-output operation mode of this utility model. Detailed Implementation

[0011] 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, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0012] In the description of the embodiments of this utility model, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0013] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0014] In the description of the embodiments of this utility model, "a plurality of" means at least two.

[0015] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0016] Example:

[0017] A water spray desuperheating device for low-pressure cylinder zero-output operation mode is installed on the connecting pipe 3 between condensate pipeline 1 and low-pressure cylinder water spray branch pipe 2. The connecting pipe 3 is provided with a shut-off valve A4, a flow meter 5, a solenoid valve 6, and an electric regulating valve 7 in sequence from condensate pipeline 1 to low-pressure cylinder water spray pipeline. A pipeline booster pump A8 and a pipeline booster pump B9 are connected in parallel at both ends of the shut-off valve A4. One end of the pipeline booster pump A8 is connected to the pipeline between condensate pipeline 1 and shut-off valve A4, and the other end is connected to the pipeline between shut-off valve A4 and flow meter 5 through check valve 10 and shut-off valve B11. The two ends of the pipeline booster pump B9 are respectively connected to the two ends of the pipeline booster pump A8.

[0018] In this embodiment, two pipeline booster pumps (one for operation and one for standby) are added to the condensate to low-pressure cylinder spray branch pipe. A check valve, an electric shut-off valve, a flow meter, and an electric regulating valve are installed at the pump outlet. When the unit's low-pressure cylinder operates at zero output, the low-pressure cylinder spray branch pipe booster pump starts, and the pressure and flow rate required by the low-pressure cylinder spray system are controlled by adjusting the electric regulating valve. At this time, the condensate pump only needs to control the condensate pressure based on the deaerator water level. This invention effectively reduces the power consumption and personnel workload of the condensate pump in the zero-output cylinder operation mode. The addition of two pipeline booster pumps (one for operation and one for standby) with interlocked automatic start / stop function improves the safety of the last-stage blades of the low-pressure cylinder in the zero-output cylinder operation mode. This invention does not change the low-pressure cylinder zero-output operation mode, the operating pressure and flow rate of the low-pressure cylinder spray system.

[0019] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A water spray desuperheating device for low-pressure cylinder zero-output operation mode, installed on the connecting pipeline between the condensate pipeline and the low-pressure cylinder water spray branch pipeline, characterized in that, The connecting pipeline route from the condensate pipeline to the low-pressure cylinder spray pipeline is sequentially equipped with a shut-off valve A, a flow meter, a solenoid valve, and an electric regulating valve; the shut-off valve A is connected in parallel with a pipeline booster pump A and a pipeline booster pump B.

2. The water spray desuperheating device for low-pressure cylinder zero-output operation mode according to claim 1, characterized in that, One end of the pipeline booster pump A is connected to the pipeline between the condensate pipeline and the shut-off valve A, and the other end is connected to the pipeline between the shut-off valve A and the flow meter through the check valve, the shut-off valve B, and the shut-off valve A.

3. The water spray desuperheating device for low-pressure cylinder zero-output operation mode according to claim 1, characterized in that, The two ends of the pipeline booster pump B are respectively connected to the two ends of the pipeline booster pump A.

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