Boiler with height alternation starting heating

Abstract

The invention provides a boiler. The boiler comprises an electric heater device and a steam dome. The electric heater device is arranged in the steam dome. The steam dome comprises a water inlet pipeand a steam outlet. The electric heater device comprises a first header, a second header and a coiler. A first electric heater and a second electric heater are arranged in the first header and the second header respectively. The first header and / or the second header are / is filled with phase change fluid. Each electric heater device is arranged in a multi-segment manner in the height direction, each segment is independently controlled, and the multiple segments are started up and shut down periodically along with time. According to the boiler, because the electric heaters are gradually startedup from bottom to top, the fluid on the lower part can be sufficiently heated to form quite good free convection to further promote flow of the fluid, and the elastic vibration effect is improved. According to the boiler, because the electric heaters are arranged in the two headers respectively, and the heating power changes along with time, the fluid can be frequently evaporated to expand and shrunk in elastic tube bundles so as to drive the elastic tube bundles to vibrate unceasingly, the heating efficiency can be further improved, and the descaling operation can be improved further.

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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