Electrolytic descaling device for circulating water treatment of ship boiler

Abstract

The invention discloses an electrolytic descaling device for circulating water treatment of a ship boiler. The device comprises a reducing motor, a water inlet valve, a water outlet valve, a drainage valve, a reverser, a scraper, circular disc plate electrodes, a precipitation tank, conductivity detection electrodes, a scale controller, a cylindrical barrel, a precipitation tank, a rotary shaft, a slide ring and a shaft sleeve, wherein six pairs of circular disc plate electrodes are sequentially fixed on the rotary shaft, respectively; the front five pairs of circular disc plate electrodes are connected with the reverser through leads to form a multi-stage serial treatment structure; the last pair of the circular disc plate electrodes is taken as the conductivity detection electrodes which are connected with the scale controller through leads. According to the device disclosed by the invention, the multi-stage serial plate electrodes are adopted, so that the contact area of electrochemical reaction can be effectively enhanced, the descaling rate in unit time is improved, and meanwhile, the size of the device is reduced, and the spatial utilization rate is improved. The device disclosed by the invention collects hardness of treated water to form closed-loop control to automatically feed back and adjust the decomposition voltage, so that the device is simple and convenient to operate, and the energy consumption of the whole device can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of scale treatment of ship boilers, in particular to an electrolytic descaling device for treatment of circulating water of ship boilers. Background technique [0002] Marine boilers are important marine equipment for steam power machinery and heating for steam-propelled ships. The water used mainly comes from shore-based fresh water and distilled water from water generators. The dissolved inorganic salts in the water will produce scale and mud on the heat transfer surface of the boiler. slag, affecting the normal operation of the boiler. [0003] Scaling of marine boilers will seriously reduce the heat transfer efficiency of the equipment. According to statistics, the scaling of the boiler wall will increase the heat transfer resistance by as much as 30%. Due to the different thickness of local scaling, it will also cause uneven heating of the furnace wall, resulting in cracks and even the risk of explosio...

AI Technical Summary

Problems solved by technology

[0003] Scaling of marine boilers will seriously reduce the heat transfer efficiency of the equipment. According to statistics, the scaling of the boiler wall will increase the heat transfer resistance by as much as 30%.

Due to the different thickness of local scaling, it will also cause uneven heating of the furnace wall, resulting in cracks and even the risk of explosion

Moreover, scaling components and the metal wall surface are easy to form micro-batteries, resulting in electrochemical corrosion and reducing the strength of the furnace.

Therefore, during the operation of the ship, it is necessary to regularly test the boiler water and dosing treatment. Not only is the operation complicated and the cost is increased, but also the chemical agents will cause secondary pollution to a certain extent.

At the same time, the boiler needs to be descaled every year to effectively remove the hard scale attached to the inner surface of the furnace, which not only increases the workload of the engineers, but also affects the operation of the ship.

[0004] In summary, the current descaling methods such as chemical descaling, mechanical descaling, electrochemical descaling and other methods have one or more problems of limited descaling effect, heavy workload, complicated operation, secondary pollution, and high cost

Such as: "Descaling agent and its preparation process" disclosed in Chinese patent ZL94105171.4, using chemical descaling, pickling has serious corrosion on metals, high cost, and causes secondary pollution to the environment

The "automatic sewage valve" disclosed in Chinese patent ZL201120541758.8 has a relatively simple structure, but it can only remove the sludge and floating matter deposited in the furnace, and cannot discharge the hard scale attached to the surface of the furnace body.

Chinese patent ZL200480043882.4 discloses "Cooling Water Circulation Device and Its Scale Removal Method", the efficiency of electrolytic descaling is not high, and the device is large in size, which is not suitable for ship installation requirements

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