CN-116382363-B - TRT stationary blade control device

Abstract

The present application relates to a TRT stationary blade control device, comprising: the control valve, the control valve servo controller, the control valve electrohydraulic servo valve, the stator blade position sensor and the TRT unit control system; the TRT stationary blade control device can effectively limit the opening of the TRT stationary blade in a safe and efficient area, and meanwhile, the safety and stability of the TRT stationary blade on blast furnace top pressure control are not affected; the control loop of the TRT stator blade control device can be perfectly fused with the existing blast furnace top pressure PID control loop, and the TRT stator blade control loop is only in an on-line monitoring state when the TRT stator blade is in a safe and efficient area operation, and only when the TRT stator blade is separated from the safe and efficient area, the TRT stator blade control loop can act in time.

Inventors

• ZHANG NAN
• YANG GANG
• HONG YANG
• Weng yan
• DU YAN
• TIAN WEIRONG
• JIA JIANGPING
• WANG DONGSHENG
• XIE TAO
• HUANG MEICHUN

Assignees

• 西安陕鼓动力股份有限公司

Dates

Publication Date

20260505

Application Date

20230412

Claims (5)

1. 1. The TRT stationary blade control device is characterized by comprising a control valve, a control valve servo controller, a control valve electrohydraulic servo valve, a stationary blade position sensor and a TRT unit control system; The stator blade position sensor is used for acquiring a measured value of the opening degree of the TRT stator blade and sending the measured value of the opening degree of the stator blade to the TRT unit control system; when the measured value of the opening degree of the static blade is smaller than a first set value alpha, the TRT unit control system sends a valve closing command signal to the control valve servo controller, and after the control valve servo controller receives the valve closing command signal, the control valve electro-hydraulic servo valve controls the control valve to close the valve until the measured value of the opening degree of the static blade is not smaller than the first set value alpha, the valve closing action of the control valve is stopped, and the control valve is in a position-keeping state; When the stator blade opening degree measured value is larger than a second set value theta, the TRT unit control system sends a valve opening command signal to the control valve servo controller, the control valve servo controller receives the valve opening command signal and then controls the control valve to open through the control valve electrohydraulic servo valve, if the stator blade opening degree measured value is not smaller than the second set value theta all the time, the valve opening operation is continued until the control valve is fully opened, if the stator blade opening degree measured value is smaller than the second set value theta in the valve opening process, the valve opening operation of the control valve is stopped, and the control valve is in a position-keeping state, and if the stator blade opening degree measured value is smaller than a first set value alpha in the valve opening process, the valve closing operation when the stator blade opening degree measured value is smaller than the first set value alpha is executed; The first set value alpha and the second set value theta satisfy the following relation that 2 alpha is more than or equal to theta is more than or equal to 1.3 alpha.
2. 2. The apparatus of claim 1, wherein a closing rate A of the control valve and a opening rate B of the control valve satisfy a relationship of TRT vane adjustment rate > closing rate A > opening rate B.
3. 3. The apparatus of claim 1, wherein the TRT vane adjustment rate is equal to 3-10 times the valve closing rate a, which is equal to 1-5 times the valve opening rate B.
4. 4. A blast furnace top pressure PID control device is characterized by comprising a blast furnace top pressure PID control loop and a TRT stator blade control device, wherein the TRT stator blade control device is the TRT stator blade control device according to any one of claims 1-3.
5. 5. The apparatus of claim 4, wherein the blast furnace top pressure PID control loop comprises a vane servo controller, a vane electrohydraulic servo valve, a TRT vane actuator, a blast furnace top pressure sensor; The blast furnace top pressure sensor is used for acquiring a blast furnace top pressure measured value; The TRT unit control system compares a blast furnace top pressure set value with the blast furnace top pressure measured value in real time, determines an opening value required to be reached by a TRT stationary blade according to a comparison result, and outputs the opening value required to be reached by the TRT stationary blade to the stationary blade servo controller to serve as a stationary blade opening set value of the stationary blade servo controller; The stator blade servo controller compares the stator blade opening set value with a stator blade opening measured value fed back by a stator blade position sensor in real time, determines a stator blade opening change value according to a comparison result, and outputs the stator blade opening change value to the stator blade electrohydraulic servo valve; the stator blade electrohydraulic servo valve controls power oil to drive the stator blade actuator, so that the opening variation of the TRT stator blade reaches the stator blade opening variation value to control the top pressure of the blast furnace.

Description

TRT stationary blade control device Technical Field The application relates to the technical field of residual pressure and waste heat power generation, in particular to a TRT stationary blade control device. Background The blast furnace gas residual pressure turbine power generation device (Blast Furnace Top Gas Recovery Turbine Unit, TRT for short) is an environment-friendly product which is produced by utilizing high temperature and high pressure blast furnace gas as a byproduct of blast furnace smelting, driving a gas turbine to drive a generator to generate power through gas, converting kinetic energy and potential energy of the gas into mechanical energy, finally converting the mechanical energy into electric energy for storage or connecting the electric power into a power grid, realizing the secondary utilization of the residual pressure and the residual temperature of the blast furnace gas, and is currently used as an energy-saving and emission-reducing environment-friendly product advocated by CDM (clean development mechanism). The furnace top pressure of the blast furnace is an important control parameter in the normal production process of blast furnace smelting, and the stability of the furnace top pressure directly influences the safety and stable production of the blast furnace and also influences the yield. In general, if a TRT device is not arranged in the smelting process, the pressure of the top of the blast furnace is regulated by a pressure reducing valve group, and if the TRT device is arranged, the pressure of the top of the blast furnace is regulated by a TRT, and precisely, the pressure of the top of the blast furnace is controlled by a TRT stationary blade. Therefore, the TRT not only bears the heavy duty of the residual gas pressure and the residual temperature power generation, but also bears the heavy duty of stable, safe and high-precision regulation of the pressure at the top of the blast furnace. In the normal production process of the blast furnace, the TRT stationary blade is always operated in a safe and efficient area due to the unique matching property of the scale selection of the TRT device and the gas pressure and the gas generation amount during the normal production of the blast furnace. If the blast furnace needs to run in a yield-reducing way for some reasons, the blast furnace top pressure and the blast furnace gas generation amount can be greatly reduced, or the blast furnace top pressure fluctuation can be larger when the blast furnace production is unstable, in order to ensure that the blast furnace top pressure reaches the blast furnace production requirement and stabilizes the furnace top pressure, the TRT stationary blade opening can be greatly reduced, at the moment, the TRT stationary blade opening can be always positioned outside a safe and efficient area, the power generation efficiency can be greatly reduced along with the smaller stationary blade opening, meanwhile, the gas flow rate flowing through the stationary blade can be increased due to the smaller stationary blade opening, a high-speed scouring effect can be formed on the TRT blade, the blast furnace gas itself contains a large amount of dust particles and acid substances, the high-speed scouring easily causes blade abrasion, corrosion and fracture, and the service life of the blade is shortened. Disclosure of Invention In order to overcome at least one of the shortcomings in the prior art, the application provides a TRT stationary blade control device. In a first aspect, a TRT stationary blade control device is provided, comprising a control valve, a control valve servo controller, a control valve electrohydraulic servo valve, a stationary blade position sensor and a TRT unit control system; The stator vane position sensor is used for acquiring a stator vane opening degree measured value of the TRT and sending the stator vane opening degree measured value to the TRT unit control system; When the measured value of the opening degree of the static blade is smaller than a first set value alpha, the TRT unit control system sends a valve closing command signal to the control valve servo controller, and after the control valve servo controller receives the valve closing command signal, the control valve electro-hydraulic servo valve controls the control valve to close the valve until the measured value of the opening degree of the static blade is not smaller than the first set value alpha, the valve closing action of the control valve is stopped, and the control valve is in a position-keeping state; When the measured value of the opening degree of the static blade is larger than a second set value theta, the TRT unit control system sends a valve opening command signal to the control valve servo controller, the control valve servo controller controls the control valve to open through the control valve electrohydraulic servo valve after receiving the valve opening command signal, if the measured value