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Valve configuration method for efficient and safe operation of eight-nozzle group steam turbine
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A technology of safe operation and configuration method, applied in mechanical equipment, engine components, machines/engines, etc., to achieve the effect of ensuring economy, reducing the number of tests, and improving competitiveness
Active Publication Date: 2022-05-03
HARBIN INST OF TECH +2
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problem of throttling loss and provide a valve configuration method for efficient and safe operation of eight-nozzle group steam turbines in order to solve the existing steam inlet setting method that limits the number of valves in the eight-valve configuration unit.
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specific Embodiment approach 1
[0033] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the valve configuration method for the efficient and safe operation of the eight-nozzle group steam turbine described in this embodiment, the specific process is:
[0034] S1: Obtain the optimal "4+2+2" steam intake method according to the data of the valve sequence of the existing unit;
[0035] S2: According to the "4+2+2" steam inlet method obtained in S1, it is split into the corresponding "2+2+1+1+1+1" steam inlet test method;
[0036] S3: Obtain the valve status of the unit according to the operation data of the valve of the unit, filter and adjust the opening sequence of the valve according to the valve status, and obtain the steam inlet mode after screening and adjustment of "2+2+1+1+1+1";
[0037] S4: According to the "2+2+1+1+1+1" obtained in S3, the steam inlet mode is screened and adjusted to conduct a valve switch test to obtain the optimal "2+2+1+1+1+1" steam in...
specific Embodiment approach 2
[0040] Embodiment 2: This embodiment further explains Embodiment 1. The acquisition method of the valve sequence data of the existing unit mentioned in S1 includes: historical operation data and the steam intake law curve of the sequence valve in the DCS system of the unit.
specific Embodiment approach 3
[0041] Specific implementation mode 3: This implementation mode further explains the implementation mode 1. According to S1, the optimal "4+2+2" steam inlet mode is obtained according to the data of the valve sequence of the existing unit. The specific method is as follows:
[0042]S1-1: Determine the "4+2+2" steam intake mode of the unit operation. If it is diagonal steam intake, execute S1-2. If it is upper cylinder intake steam, lower cylinder intake steam or side cylinder intake steam, execute S1. -3;
[0043] S1-2: Obtain the current state of the unit, and judge whether it is necessary to re-test according to the current state of the unit. If so, execute S1-3. If not, the current steam intake mode is the optimal "4+2+2" steam intake mode by default;
[0044] S1-3: Conduct a test of the valve opening sequence to obtain the optimal "4+2+2" steam intake method.
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Abstract
The valve configuration method for efficient and safe operation of an eight-nozzle group steam turbine belongs to the technical field of nozzle configuration. The present invention solves the problem of throttling loss caused by the existing steam inlet setting method limiting the number of adjustment valves of the eight-adjustment valve configuration unit. . The present invention obtains the optimal "4+2+2" steam inlet mode according to the data of the valve sequence of the existing unit; splits it into the corresponding "2+2+1+1+1+1" steam inlet test mode; The state screens and adjusts the opening sequence of the valves to obtain the "2+2+1+1+1+1" steam inlet mode after screening and adjustment; conduct the door switch test to obtain the optimal "2+2+1+1+1+ 1" steam intake mode; the sequence valve steam intake law curve corresponding to the optimal "2+2+1+1+1+1" steam intake mode is implanted into the DCS system of the unit. The invention is used to configure the nozzle valve of the steam turbine.
Description
technical field [0001] The invention relates to a valve configuration method for efficient and safe operation of an eight-nozzle group steam turbine, and belongs to the technical field of nozzle configuration. Background technique [0002] In order to balance the dynamic power supply and demand balance between the grid user end and the production end (generator set), the dispatcher and the power plant need to continuously adjust the output power of the set. At present, coal-fired units mainly change the output of the unit by adjusting the parameters of the steam entering the steam turbine or the inlet steam flow, and the adjustment of the inlet steam flow is realized by changing the high valve opening. steam) and sequence valve mode (partial steam intake). The single valve mode means that all the high valves operate synchronously and have the same opening degree, and the sequential valve mode means that the unit opens the high valves sequentially according to the load deman...
Claims
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