What is a balanced container and how does it work?
Release time:
2022-06-23
As a liquid level measurement tool for boiler drum water level, balance vessel is widely used in power plant and coal chemical industry. Because the measurement position is very important, the normal operation of the boiler system is directly related to the safety of the boiler system, so the measurement accuracy of the balance vessel also plays an indispensable role in the production process. If you do not understand its structural characteristics and installation methods, it will inevitably lead to major safety hazards during operation. The balance container itself is a kind of drum water level measuring device with ingenious structure, which has certain self-temperature and pressure compensation ability. Balance vessel is divided into single chamber balance vessel and double chamber balance vessel. The double-chamber balance vessel has a
As a liquid level measurement tool for boiler drum water level, balance vessel is widely used in power plant and coal chemical industry. Because the measurement position is very important, the normal operation of the boiler system is directly related to the safety of the boiler system, so the measurement accuracy of the balance vessel also plays an indispensable role in the production process. If you do not understand its structural characteristics and installation methods, it will inevitably lead to major safety hazards during operation. The balance container itself is a kind of drum water level measuring device with ingenious structure, which has certain self-temperature and pressure compensation ability. Balance vessel is divided into single chamber balance vessel and double chamber balance vessel. The double chamber equalizing vessel has an annular funnel structure above the reference cup, dividing the whole equalizing vessel into two parts.
Balance vessel working principle: 1, condensation chamber. Ideally, the saturated steam from the steam drum will release the latent heat of vaporization here to form saturated condensate water and supply the reference cup. 2, the benchmark cup. Collect the condensed water from the condensation chamber and output the pressure generated by the condensed water to the positive pressure side of the differential pressure transmitter. The volume of the reference cup is limited, and the condensed water overflows the reference cup and flows to the overflow chamber when it is full. Because the height of the cup mouth of the reference cup is fixed, it is called the reference cup. 3. Overflow chamber. The overflow chamber occupies most of the space of the container, and its main function is to collect the condensed water overflowing from the reference cup and discharge the condensed water into the downcomer of the boiler. The entire container is heated and stored during the flow to ensure that the temperature in the container and the barrel is consistent. 4. Connectors. One end of the horizontal part of the inverted "T" joint is connected to the drum, and the other end is connected to the negative pressure side of the transmitter. There is no doubt that its main function is to transfer the pressure generated by the dynamic water level in the drum to the negative pressure side of the transmitter and compare it with the (reference) pressure on the positive pressure side to know the water level in the drum.
It can be seen from its working principle that the output pressure on the positive pressure side of the balance container is equal to the total static pressure above the liquid level of the reference cup plus the condensation pressure between the reference cup and the horizontal axis of the water side inlet. Side negative pressure is equal to the total static pressure above the horizontal level of the reference cup mouth, plus the pressure generated from the water level of the reference cup mouth to the saturated steam at the steam-water interface in the drum, plus the pressure generated from the saturated water at the steam-water interface in the drum to the horizontal axis of the water side inlet pipe. The steam in the drum is used for heating, so that the density of the water in the reference cup corresponds in any case to the density of the saturated water at the drum pressure, independent of the ambient temperature. Thus, the pressure difference between the positive pressure side and the negative pressure side correctly reflects the water level of the steam drum. The double-chamber balance container has the ability of automatic compensation, which is mainly reflected in that when the drum water level is close to zero water level, the output pressure difference is less affected by the pressure change, and the impact on the drum water level measurement is small.
As a kind of liquid level measuring instrument, balance vessel is widely used in industry. Understanding its structure, working principle and installation method can help us effectively solve various problems encountered in the actual production of the balance vessel, reduce the safety hazards in the operation of the boiler system, ensure the normal operation of the whole device, and bring better benefits to the production enterprise.
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