As a major energy consumer, cement industry utilizes waste heat power generation to recycle waste heat, which can not only create greater economic benefits for enterprises, reduce product costs, improve product competitiveness, but also alleviate the contradiction of insufficient power supply affecting production, in line with the national policy on energy saving and comprehensive utilization of resources.
However, in the long-term operation of the waste heat power generation boiler, it is easy to cause ash deposition on the tube bundle of the boiler, which leads to the reduction of the heat exchange efficiency of the boiler, the ineffective use of heat, the low ventilation rate of the boiler, the high exhaust gas temperature, and the large wind resistance, affecting the normal production of the boiler, affecting the production capacity, and also causing direct economic losses to the enterprise.
"Regular cleaning of waste heat power generation boilers is equivalent to maintenance of equipment to avoid serious ash accumulation leading to low power generation efficiency." He Houcun, general manager of Yuncheng Wantong Dry Ice Equipment Automation Co., Ltd. (Hereinafter referred to as "Wantong Dry Ice"), told China Cement Network that at present, most of the waste heat power generation boilers at kiln head and kiln tail in domestic cement plants have not been thoroughly deashed in 4-8 years of use. When the fins of kiln head boiler are seriously deposited and hardened, it will have a great adverse impact on the efficiency of waste heat power generation in cement enterprises. He Houcun (right), general manager
of Wantong Dry Ice, communicated
with China Cement Net. The dry ice cleaning device used by Yuncheng Wantong Dry Ice Equipment Automation Co., Ltd. for the construction project of floating ash recovery technology on boiler fins has obtained the utility model patent certificate with the patent number of ZL202121479998X. At the same time, it has won the honorary title of "Cement Network Technology Innovation Supplier".
It is understood that when the traditional cleaning method of waste heat power generation boiler is used to clean fins of the boiler, the fins need to be removed to the ground and then cleaned, which is time-consuming and expensive, and the dust in the process of disassembly and assembly is relatively large. In addition, the fin tubes are repeatedly disassembled, cut and welded, and the material at the weld is easy to oxidize and corrode, which will lead to water leakage and shorten the service life of the tube bundle. In this context, choosing an efficient and fast way of dry ice cleaning has become the aspiration of cement enterprises. "After practice, the advantages of dry ice cleaning waste heat power generation boiler are obvious." He Houcun pointed out.
What is dry ice cleaning? He Houcun introduced. Dry ice cleaning principle: spray granular dry ice particles to the surface of the boiler heating surface through high-pressure air, and use the physical reaction of temperature difference to separate different substances at different shrinkage speeds. When the dry ice particles at -78 ℃ contact the surface of ash accumulation and hardening, embrittlement explosion occurs, which makes the ash accumulation and hardening shrink and loosen, and then the dry ice particles will instantly vaporize and expand hundreds of times. Produces a strong stripping force, so that dust accumulation and hardening can quickly and thoroughly fall off from the surface. Any dirt that can be scraped off with a coin can be cleaned.
In He Houcun's view, dry ice cleaning has many unique advantages, such as online dry ice cleaning will not produce secondary pollutants, greatly reducing the cost of pollutant treatment; no wear and tear, cleaning intensity can be adjusted at will, reducing equipment wear and tear, prolonging service life; non-toxic, odorless and pollution-free, carbon dioxide can be recycled; Effectively remove corners, gaps, dead corners, uneven surfaces and corners.
Specific to the cement industry, the fins of waste heat power generation boiler can be cleaned by dry ice to improve the power generation and prolong the service life of the fins. "Dry ice cleaning technology is advanced and effective, and has become the best choice for cleaning the fins of kiln head boilers in cement plants." He Houcun said.
For example, after the dry ice cleaning at the kiln head and tail of a company in Conch Group is completed, the temperature at the outlet of the boiler drops, the tube bundle is clean, the tube seam is smooth, the power generation is greatly increased, and the operation efficiency is good; The ash deposition and structure of kiln head and tail pipe in a company of Shanshui Group are serious, which affects the heat exchange efficiency and power generation of equipment. After dry ice cleaning, the pipe bundle is clean, the pipe seam is smooth, the pressure difference of kiln head boiler is reduced, the heat exchange effect of the system is improved, and the power generation is significantly improved.
At present, The products of Wantong Dry Ice have entered China Building Material Group, Conch Group, Jinyu Group, Shanshui Group, Zhonglian Cement , Southwest Cement , Qilian Mountain Cement, North Cement, Hundreds of cement enterprises, such as Tongli Cement , Fujian Cement, Esheng Cement, Sichuan Foguang Cement and Tangshan Shenglong Cement, are highly praised by customers for their efficient and remarkable dry ice cleaning service quality.
"In addition to waste heat power generation boilers, dry ice cleaning can also be used for the maintenance and cleaning of other high-precision equipment in cement enterprises, and the effect is also very prominent." He Houcun added.
With the continuous promotion of cost reduction and efficiency enhancement in cement enterprises, the use of dry ice cleaning and other maintenance technologies with low cost and obvious comprehensive advantages to avoid serious loss of equipment may become an important part of the green development of cement enterprises.
Tel:
Manager He, 15965555281; Manager Pan, 18561609951; Manager Zhou, 18854290651; Manager Su, 19862280699
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