A steam boiler is controlled according to the flow rate difference

Abstract

The present invention provides a steam boiler based on flow rate difference control. The steam boiler includes an electric heating device and a steam chamber. The electric heating device is arranged in the steam chamber. The steam chamber includes a water inlet pipe and a water outlet pipe. The electric heating device includes a first tube box, a second tube box and a coil tube, the coil tube is connected with the first tube box and the second tube box, and a speed sensing element is arranged inside the free end of the tube bundle to detect the fluid in the free end of the tube bundle The speed sensing element is connected with the controller, the controller extracts the speed data according to the time sequence, and obtains the speed difference or the accumulation of the speed difference change through the comparison of the speed data of the adjacent time periods, which is lower than the threshold value. When the controller controls the electric heater to stop heating or continue heating. The present invention uses the speed difference before and after detection by the speed sensing element or the accumulated speed difference, and it can be judged by the speed difference that the evaporation of the internal fluid has basically reached saturation, so that the internal fluid can vibrate frequently, so as to achieve a good descaling and heating effect.

Description

technical field [0001] The invention relates to a steam generating device, in particular to a steam boiler with flow rate difference control. Background technique [0002] A steam boiler is used to generate steam, which is a mechanical device that uses the thermal energy of fuel or other energy sources to heat water into steam. The steam boiler has a wide range of applications and is widely used in garment factories, dry cleaners, restaurants, steamed buns, canteens, restaurants, factories and mines, soy products factories and other places. In the applicant's previous application, a new type of coil-type electric heating coil, such as CN106123306A, was developed and studied, so as to make the elastic tube bundle vibrate due to the expansion of the fluid therein caused by heating, so as to achieve heating and descaling Effect. [0003] However, in the application, it is found that the continuous heating of the electric heater will lead to the stability of the fluid formatio...

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Problems solved by technology

[0003] However, in the application, it is found that the continuous heating of the electric heater will lead to the stability of the fluid in the internal electric heating device, that is, the fluid is not flowing or has little fluidity, or the flow rate is stable, resulting in a greatly weakened vibration performance of the coil, which affects Coil descaling and heating efficiency, Qingdao University of Science and Technology conducted research on this, developed a new steam boiler that can generate periodic vibrations, and has already applied for patents, the application numbers are 2019101874848, 2019101875431, 2019101866555, 2019101914489

[0004] However, in practice, it is found that if the vibration of the tube bundle is adjusted through fixed periodic changes, there will be hysteresis and the period will be too long or too short

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