1. Harbin Electric Co., Ltd. Heilongjiang Harbin 150001; 2. Harbin Steam Turbine Co., Ltd., Harbin 150000, China; 3. Xuzhou Institute of Combustion Control, Xuzhou 22100, China The purity of hydrogen is a theoretical explanation of the relationship between hydrogen purity and gas density. 1 The 600 turbine generator produced in China adopts the method of water-hydrogen-hydrogen cooling, ie, the winding is water-cooled, the rotor winding is hydrogen-intercooled, and the iron core is hydrogen-cooled; hydrogen is used as a kind of cooling medium for the generator, and its force temperature purity Changes in humidity directly affect the ability of the generator to operate normally and efficiently. Therefore, the devices that analyze and detect hydrogen parameters become an important part of the hydrogen control system. Here we will elaborate on the analysis and detection of hydrogen purity in the generator.

Hydrogen is a very light and flammable gas. Its specific gravity is only 15% of air. Therefore, using hydrogen as a cooling medium, the generator's ventilation loss can be reduced by 6.95. The friction loss of the rotor is only 0 of the air cooling medium. The heat dissipation capacity of hydrogen is 4 times that of air. From then on, the efficiency of the generator can be greatly improved and the operating temperature can be reduced. If the original operating temperature is maintained, the capacity of the generator is also correspondingly improved. The hydrogen purity in the generator can be maintained at 98. For the best conditions, if the gas purity is too high above 98, the hydrogen consumption will increase, which is unreasonable from the economic point of view. If the purity of the gas is lower than 95, it will be The efficiency of the generator is reduced. At the same time, the internal volume and the volume of the internal body are increased. It is easy to form an explosive mixture with the sense gas. Unsafe Only when the hydrogen supply is insufficient can the generator be allowed to have a hydrogen purity of 90,95. The inert gas used in the hydrogen replacement process is gas-substituting, and it is used as an intermediate medium with respect to the godfather and hydrogen. Or, this article uses 03 as an example to replace the air from the inside of the machine. Come on top of the motor sampling, yet. 02 When the purity reaches 95, stop charging 1 and then replace the inside of the machine with hydrogen. 2. Take a sample at the bottom of the motor. The hydrogen purity in the generator reaches 95 to end hydrogen charging. When the hydrogen generator is discharged, the procedure is reversed, ie, the displacement helium is replaced with air. 2. In order to detect the gas purity of the generator during gas replacement and operation, a complete set of detection devices, ie, hydrogen purity analyzer, must be installed. Transmission device.

The device uses a mechanical density analyzer to monitor the gas purity in the generator, and is composed of a purity fan compressor transmitter and a signal converter alarm component. 1. The INDI purity indicator; IND2 hydrogen pressure indicator; IND3 gas density indicator IND4 Generator fan differential pressure indicator; PT1 hydrogen pressure transmitter; IPT1 purity fan differential pressure transmitter DPT2 generator fan differential pressure transmitter; ADRI operator; SCTI signal converter; IXAI purity alarm assembly; IXA2 Force alarm component; usually the density of the two mixed gases is different from the density of these gases at the same temperature and at the same time. If the density of the species gas is known, as long as the density of the mixed gas is measured, the content of another gas in the mixed gas can be determined. Especially for gases with large differences in density, the test results are more accurate. The relative density of the mixed gas uses a light-loaded, constant-speed fan to produce a pressure differential between the passed mixed gas. This difference is related to the density of the gas in the machine and the geometric parameters of the fan itself. When parameters and speed are fixed, the differential pressure it can produce directly reflects the density of the gas. The gas density is directly related to the composition of the gas. Therefore, by directly displaying the value of 7 and the change of 4 and 13 as long as the inlet pressure difference of the purity fan is measured, it can be calculated that the machine can understand the 71 and 071 transmitters. The density and composition of the gas in the working situation, the instrument actually measures the child's pressure difference generated by the fan.

The purity signal is generated by the generator fan pressure difference and the purity juice fan pressure differential. The hydrogen pressure signal passes through a divider and a signal converter, and the density refers to the purity of the purity fan fan pressure difference and a constant, that is, the purity signal comes from the density signal and Generator fan differential pressure signal.

Purity calculation flow 2.

Purity Fan Differential Pressure Transmitter Output Differential Pressure in the Mixture + Differential Pressure in the Air x1053 + 4mA Hydrogen Pressure Transmitter, Output 6 Internal Pressure With this device, the gas in the generator can be observed at any time Purity. At the same time, the hydrogen purity alarm is set. When the hydrogen purity is higher or lower than the alarm value, the alarm device will send out an alarm signal. The on-duty personnel can take corresponding measures according to the actual situation to ensure the normal operation of the unit.

According to the actual situation, the device was optimized, a new type of gas purity analyzer was selected, and the purity signal alarm of the purity of the signal converter of the calculator was packed in the body, and the output signal and the output signal of the 1st milk 2 and 13 were available. Directly, the purity of the test 1 body can be detected at the same time. The instrument has a function of detection, first self-test after power on, if the self-test is normal, it enters the inspection state. In addition, the instrument can also set the hydrogen purity alarm value on the panel at any time. The operation is simple and convenient, and the internal EEPROM realizes data break. Electrical protection.

Hydrogen purity is the most important technical parameter of the generator. Whether or not the hydrogen purity can be correctly detected will directly affect the normal operation of the generator set. The optimized device makes the hydrogen purity detection quick, convenient and accurate, providing guarantee for the normal operation of the generator set.

Universal Ion Controller

The ion content in water has a great influence on aquatic organisms and the ecological environment. Conditions where some ions are too high or too low can lead to aquatic life death or habitat destruction. By monitoring changes in water quality ions, timely measures can be taken to protect aquatic organisms and the ecological environment. The online ion controller can add a variety of ion composite sensors. Based on the ion selective electrode method, it can detect chloride ions, sodium ions, potassium ions, calcium ions, fluorine ions and other ions. In addition, the controller also has the function of temperature detection and compensation for the measured water sample. The ion controller is configured with 2 SPST relays by default, 2 channels of 4-20mA current output and an optional RS485 interface. The controller power supply is powered by a wide voltage to avoid interference caused by voltage instability. We currently offer ion controllers in two sizes, the small size is suitable for panel installation, and the large size can be wall-mounted or pipe-mounted.

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