Self-adaptive undisturbed switching device of steam-driven induced draft fan in heat-engine plant

A technology of non-disturbance switching and induced draft fan, which is applied in the direction of safety devices, engine components, machines/engines, etc., can solve the problems of lack of quick response ability, potential safety hazards, and complicated switching of furnace negative pressure, so as to improve safety and improve Control the speed and effect, and ensure the effect of equipment safety

CN103498805AActive Publication Date: 2014-01-08ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-01-08

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Abstract

The invention discloses a self-adaptive undisturbed switching device of a steam-driven induced draft fan in a heat-engine plant. The self-adaptive undisturbed switching device of the steam-driven induced draft fan in the heat-engine plant comprises a control signal main center device, an undisturbed switching unit, a stationary blade server, a rotating speed server, the induced draught fan and a small steam engine. The control signal main center device calls running data in a data collecting system of the heat-engine plant, and transmits the called running data to the undisturbed switching unit, the undisturbed switching unit carries out judgment of switching control over the opening degree of stationary blades of the induced draft fan and the rotating speed of the small steam engine on the received data, and transmits control instructions after the judgment to the stationary blade server and the rotating speed server, and the stationary blade server and the rotating speed server act according to the received control instructions to control the induced draught fan and the small steam engine respectively, wherein the stationary blade server is used for controlling the opening degree of the stationary blades of the induced draft fan, and the rotating speed server is used for controlling the rotating speed of the small steam engine. The self-adaptive undisturbed switching device of the steam-driven induced draft fan in the heat-engine plant is accurate, efficient and capable of carrying out automatic control according to the real-time running parameters of different induced draft fans and different heat-engine plants.
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Description

technical field

[0001] The invention belongs to self-adaptive automatic control equipment in a thermal power plant, in particular to an adaptive non-disturbance switching device for a steam-driven induced draft fan in a thermal power plant. Background technique

[0002] National environmental protection requirements stipulate that the FGD system of new power plants does not have a flue gas bypass and the existing FGD system must remove the bypass flue, which makes the power plant have higher and higher requirements for the FGD system. The FGD system does not have a flue gas bypass, and its operation is directly related to the safety of the unit. If the FGD system is shut down, the unit must also be shut down. From the moment the boiler is ignited, all the flue gas will directly enter the absorption tower for treatment, which makes the flue gas system in the design etc. are quite different from the conventional FGD system. For this reason, when new and old power plants insta...

Examples

Embodiment Construction

[0032] In order to better understand the present invention, the present invention will be further described below in conjunction with the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0033] Such as figure 1 As shown, an adaptive non-disturbance switching device for a steam-driven induced draft fan in a thermal power plant of the present invention includes a control signal central device 1, a non-disturbance switching unit 2, an anti-surge device 3, an overspeed protection device 4, and a vane servo 5, speed server 6, induced draft fan 7, small steam turbine 8, the control signal central device 1 transmits the operation data received from the power plant DAS system to the non-disturbance switching unit 2, anti-surge device 3 and The overspeed protection device 4 and the non-disturbance switching unit 2 judge the switching control of the opening of the induced draft fan stator blade and the speed of the small steam turbine with t...