As the name suggests, a hot water boiler is a boiler that produces hot water, which can be divided into oil-fired hot water boiler, gas-fired hot water boiler, coal-fired hot water boiler and electric hot water boiler according to different fuels. It is widely used in heating, bathing and domestic hot water in hotels, schools, guesthouses, communities, office buildings and other enterprises and institutions. The water used in hot water boilers is mainly divided into feed water and pot water, which is mainly introduced in this articleHot water boiler boiler water testing items
Boiler water refers to the water that exists in the boiler and absorbs heat to produce steam or hot water when the boiler is running, so it can be seen that the boiler water will be repeatedly evaporated and concentrated, and the concentration of some components in the boiler water is getting larger and larger, which is very unfavorable to the overall operation of the boiler, so these components are generally controlled by adding drugs and other methods. According to the requirements of the national standard "Industrial Boiler Water", the parameters that need to be tested for hot water boiler boiler water are pH, phosphate, iron, oil, phenolphthalein alkalinity and dissolved oxygen.
The pH of the pot water is generally controlled at 90-12.0 range, slightly higher than the pH range of feed water. Mainly because the boiler water will continue to evaporate and concentrate and some salts decompose, the pH of the pot water is higher than the feed water, and a dense Fe3O4 protective film can be formed on the metal surface, which is very beneficial to the anti-corrosion of the boiler.
The rated power is less than 4The phosphate of 2MW boiler boiler water is 10-50mg L, and the boiler boiler water greater than this power is between 5-50mg L, it can be seen that the phosphate content is not as little as possible, because the phosphate content is too low, which will cause scaling pores on the heating surface of the boiler, so that the calcium and magnesium ions are scaled. High phosphate content will also increase the formation of magnesium phosphate scale, which is easy to form secondary scale.
The iron content in the pot water should be controlled at 0Within 50mg L, the oil content is controlled at 2Within 0mg L, the content of dissolved oxygen is controlled at 0Up to 50 mg l. The smaller these parameters, the better, too much iron content is easy to form scale, too much oil will not only affect the quality of hot water, but also adhere to the surface of the boiler. Excessive dissolved oxygen mainly causes oxygen corrosion in boilers.
For the detection of hot water boiler boiler water, you can use the ERUN-ST series laboratory boiler water quality analyzer produced and sold by Xi'an Yingrun Environmental Protection Company, which is specially developed for boiler water, which can detect 15 kinds of parameters in boiler water, and users can flexibly match the detection parameters according to their needs. The instrument is designed using the principle of spectrophotometry, which is simple and efficient to useThe measurement wavelength is automatically selected without the need for adjustment. The storage record can reach 100,000, with one-click recovery function and data backup function, and the performance is stable and reliable.
That's allHot water boiler boiler water testing itemsThere are two kinds of water in hot water boilers, one is pot water, and the other is feed water, pot water refers to the water that exists in the boiler when the boiler is running, and feed water refers to the water that directly enters the boiler. As can be seen from the above, the test items of hot water boiler boiler water include pH, phosphate, iron, oil, dissolved oxygen and phenolphthalein alkalinity and other parameters. If the content of these parameters in the boiler water is unreasonable, it will have a negative impact on the operating efficiency and service life of the boiler, so it is necessary to regularly test the boiler water quality. In addition to the boiler water testing instruments introduced above, the company also has a variety of other products to choose from, welcome users to inquire.