Demineralized water tank for high-temperature condensate water and manufacturing method thereof

Abstract

The invention provides a demineralized water tank for high-temperature condensate water and a manufacturing method of the demineralized water tank for high-temperature condensate water. The demineralized water tank for high-temperature condensate water comprises a water tank body. The whole water tank body is made of clad steel plates in a lap joint mode, the special structure design is adopted by abutted seams, different cutting and groove preparation methods are adopted according to the difference of the thicknesses of the clad steel plates, and welding is conducted according to the sequence of basic layer welding, multiple-layer back gouging, transition layer welding and multiple-layer welding. A water tank body clad steel plate is formed by carbon steel and stainless steel in a composite mode, the outer layer is a carbon steel basic layer and serves as a water tank body supporting structure, and the inner layer of the water tank body clad steel plate is an austenitic stainless steel composite layer and serves as a water tank corrosion prevention medium. Special technological requirements for cutting and machining forming of the clad steel plates are made, and therefore the problem that the corrosion-preventing surface has scratches and is separated is solved. Special technological requirements for welding grooves, welding materials and the technology are made, and therefore the problem that when weld seams crystallize, micro-cracks are prone to being generated is solved.

Description

technical field [0001] The invention relates to the technical field of processing and forming metal composite materials, in particular to a desalinated water tank for high-temperature condensed water and a manufacturing process thereof. Background technique [0002] In the production of combined heat and power production, a large amount of heat supply steam will be produced to condense and recycle water. This kind of reclaimed water is generally of good water quality and belongs to desalinated water. It is not allowed to transport and store pipeline equipment to cause secondary pollution. The temperature of condensed return water is average. At 95°C~120°C, higher requirements are put forward for the anti-corrosion design of the inner wall of the water tank. Since the volume of the required water tank is generally large, if the desalinated water tank is directly made of all stainless steel, the cost will be greatly increased. It is necessary to adapt to high-temperature conde...

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Problems solved by technology

[0002] In the production of combined heat and power production, a large amount of heat supply steam will be produced to condense and recycle water. This kind of reclaimed water is generally of good water quality and belongs to desalinated water. It is not allowed to transport and store pipeline equipment to cause secondary pollution. The temperature of condensed return water is average. At 95°C~120°C, higher requirements are put forward for the anti-corrosion design of the inner wall of the water tank. Since the volume of the required water tank is generally large, if the desalinated water tank is directly made of all stainless steel, the cost will be greatly increased. It is necessary to adapt to high-temperature condensed water and achieve anti-corrosion and low-cost desalinated water tanks. This is of great significance for cogeneration enterprises to save energy and reduce consumption and improve economic benefits.

[0003] At present, most desalination tanks in power plants use carbon steel desalination tanks lined with rubber, but for desalination tanks that require both corrosion resistance and high temperature resistance of 95°C, stainless steel desalination tanks are usually used directly, which increases the cost of equipment

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