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Gated temperature reducing water jet control valve for thermal power plant

A thermal power plant, temperature reduction and water injection technology, applied in the field of gate valves, can solve the problems of difficult to adjust the temperature of superheated steam, manual operation, etc., and achieve the effects of saving foreign exchange, operating safety, improving thermal efficiency, and improving linearity

Inactive Publication Date: 2005-10-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Such valve working characteristics make it difficult for the superheated steam temperature adjustment system to be put into self-control operation
Play the role of automatic adjustment to ensure the stability of superheated steam temperature. The actual situation is that the steam temperature adjustment system of many thermal power plants is in a manual operation state, and some people feel that such valve characteristics are difficult to operate even by hand.

Method used

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  • Gated temperature reducing water jet control valve for thermal power plant
  • Gated temperature reducing water jet control valve for thermal power plant
  • Gated temperature reducing water jet control valve for thermal power plant

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Embodiment

[0060] Use this technique to reconfigure the gates. According to the site, the pipe inner diameter D is 30mm, the rated stroke of the valve L=30mm, ΔP R It is 0.15, F(h) requires linearity, that is, F(h)=0.91 / L+0.1, and the flow coefficient is 5.6. Based on the above data and various formulas calculated according to the gate opening edge, the relevant parameters are shown in Table 1.

[0061] l

[0062] According to table 1 get as Figure 6 The flow area distribution of the opening of the gate, the gate is installed in the original valve, after use, the measured working flow characteristics are as follows: Figure 7 As shown, the linear working area is about 65%, and the linearity is significantly improved, so that the automatic steam temperature adjustment system can be put into normal operation, the operation safety and thermal efficiency of the generating set are improved, and at the same time, no import is required, which saves foreign exchange.

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Abstract

A valve-shaped regulating valve for spraying water to lower temp in steam-electric powre plant is composed of valve body, valve cover, valve rod, valve flap installed to lower end of valve rod, and valve seat, and features that an archor-shaped hole is made on said valve flap for regulating flow continuously. Its advnatage is high linearity.

Description

technical field [0001] The invention relates to a gate valve, in particular to a gate-shaped regulating valve for reducing temperature and spraying water. Background technique [0002] In the process of thermal power generation, maintaining the stability of superheated steam temperature is necessary to ensure the safe and economical operation of the unit. Excessively high steam temperature will cause overheating of the pipe wall and cause accidents; too low steam temperature will affect the cycle of thermal power plants. Thermal efficiency. Generally, if the steam temperature is lowered by 10°C, 0.2% more fuel will be consumed. For a boiler unit with a steam pressure of 10MPa and a steam temperature of 540°C, a 10°C reduction in steam temperature will not only reduce the thermal efficiency, but also increase the steam humidity at the outlet of the steam turbine by 0.7%, thus affecting the work safety of the last stage blades of the steam turbine. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K3/02
Inventor 张玉润陈意秋
Owner ZHEJIANG UNIV