A Boiler with Heating Alternately Started

Abstract

The invention provides a boiler. The boiler includes an electric heating device and a steam drum. The electric heating device is arranged in the steam drum. The steam drum includes a water inlet pipe and a steam outlet. The electric heating device includes a first tube box, the second tube box and the coil tube, the first electric heater and the second electric heater are arranged respectively in the first tube box and the second tube box; the phase change is filled in the first tube box and / or the second tube box Fluid; the electric heater is set in multiple sections along the height direction, each section is independently controlled, and the multiple sections are periodically started and closed as time changes. The boiler of the present invention starts up gradually from the lower part through the electric heater, which can fully heat the fluid in the lower part to form a good natural convection, further promote the flow of the fluid, and increase the elastic vibration effect. The two tube boxes of the present invention are respectively equipped with electric heaters. Through the above-mentioned time-varying heating power change, the fluid can be frequently evaporated, expanded and contracted in the elastic tube bundle, thereby continuously driving the vibration of the elastic tube bundle, thereby further Achieve heating efficiency as well as descaling operation.

Description

technical field [0001] The invention relates to steam generating equipment, in particular to an intermittent vibration descaling boiler. Background technique [0002] Boilers are used to generate steam, which is a mechanical device that uses heat energy from fuel or other energy sources to heat water into steam. The steam generator has a wide range of applications, and is widely used in clothing factories, dry cleaners, restaurants, steamed bun shops, canteens, restaurants, factories and mines, bean products factories and other places. In the applicant's previous application, a new type of coil-type electric heating coil was developed and researched, such as CN106123306A, so that the elastic tube bundle caused by the expansion of the fluid caused by heating caused 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 in the internal electric heating device, ...

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Problems solved by technology

[0003] However, it is found in the application 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

[0004] Among the earlier applications of Qingdao University of Science and Technology, (eg application number 2019101874848), see attached Figure 10 , the intermittent heating method is used to make the coil vibrate, but the intermittent heating method will cause the heating to fail for a period of time, resulting in a drop in heating power

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