详情描述
Clean all types of heat exchangers, condensers, industrial pipelines, boilers, and steam power plant economizers. Greentech Chemical Co. offers reliable partnerships.
Jining Green Chemical Technology Co., Ltd. (abbreviated to Jining Green Cleaning Co.) was established in 2010 and is a specialized company in cleaning various industrial heat exchange equipment. The company boasts comprehensive business philosophy and the capability to research and develop industrial cleaning technologies. We undertake cleaning services for industrial, private enterprise, and corporate chemical equipment, power station equipment, condensers in power plants, boilers, and boiler air preheaters; as well as air conditioning cleaning, heat exchange equipment cleaning, and mechanical and chemical equipment cleaning. We also handle cleaning of refrigeration and heating equipment to remove scale.
Jining Green Clean Company stocks dozens of cleaning machines ranging from 10mpa to 250mpa, and over a dozen chemical cleaning pump stations. Our primary services are to power plants, chemical factories, oil refineries, food processing plants, corporate entities, and heating equipment. The company also provides long-term industrial heat exchanger cleaning and design solutions to industry clients.
Our company has newly acquired domestic cleaning machines and imported cleaning equipment. We have hired experienced technical specialists in the cleaning industry, ensuring that heat exchange equipment cleaning is standardized and regulated.
Chemical Cleaning Scale Removal Process
Recirculating Closed Loop Cleaning
Recirculating cleaning utilizes two existing parallel ash piping lines to form a loop, creating a recirculation system with the cleaning pump station. A solution of a certain concentration of acidity is added, which circulates through the ash water pipes for cleaning. As the acid cleaning reaches a certain level, the solution is continuously replenished. For short-distance single ash water pipelines, if conditions permit, a temporary pipeline can be laid to form a recirculation loop for cleaning. This process must be carried out while the system is offline, and it is complex and costly.
Preliminary Cleaning
During cleaning, two grey pipes cannot form a loop; only a single grey pipe should be used for open-circuit cleaning. The method involves connecting one end of the grey pipe to the cleaning unit, continuously preparing a specific concentration of cleaning solution in the liquid preparation tank, and then continuously or intermittently injecting it into the grey pipe. This process requires the addition of cleaning equipment during shutdown, which increases costs.
Non-stop cleaning
The process involves continuously injecting a certain amount of acidic fluid into the ash pipe while it is operating normally without interruption, simultaneously adding a specific quantity of ash-pipe-running corrosion inhibitor and pipeline descaling agent for cleaning. The cleaning is performed by opening the circuit. The primary role of the cleaning additives is to promote the reaction between the acidic fluid and the ash deposits at a certain concentration and flow rate, while also enhancing its solubility in water, reducing the occurrence of airlock, and ensuring the quality of ash pipe cleaning.
The procedure is as follows: Before cleaning, first estimate the required acid quantity based on the total scale in the pipeline. Then, calculate the acid addition rate and the flow rate of the descaling agent and pipeline cleaner by considering the sludge flow rate and acidity. During cleaning, take a sample at the front end of the sludge pipe every 30 minutes to test the acidity and strictly control it by adjusting the acid flow rate. In the later stage of cleaning, take a sample at the end of the sludge pipe every 15 minutes to test the pH value. When the pH value reaches a certain level and remains unchanged for 30 minutes, the cleaning can be deemed complete.
2. High-pressure water jet cleaning equipment
High-pressure water jet cleaning offers advantages such as high efficiency, low cost, non-damaging to workpieces, environmental friendliness, ease of operation, and safety.
High-pressure water technology boasts the following advantages.
(1) Excellent Cleaning Quality - During the high-pressure water jet cleaning of pipes and heat exchanger bores, all scale and blockages inside the pipes can be thoroughly removed, revealing the metal surface. The high-pressure water jet, with its immense energy and supersonic speed, is fully capable of destroying hard scale and blockages without causing any damage to the metal.
The high-pressure water pressure is less than the tensile strength grade of the metal, so high-pressure cleaning will not damage the surface being cleaned.
(2) Fast Cleaning Speed: Due to the combined fracturing effects of water jet flushing, wedging, shearing, and grinding, scale can be quickly broken and removed, making the cleaning process several to ten times faster than traditional chemical methods, sandblasting and shot peening techniques, simple mechanical, and manual methods.
Components cleaned with high-pressure water jetting do not require secondary cleaning; however, those chemically cleaned need to be rinsed with clean water to remove the surface chemicals.
(3) Environmentally Friendly Cleaning - Since high-pressure water jet cleaning uses pure water as the medium, it does not generate a large amount of dust like sandblasting, shot blasting, or simple mechanical cleaning, which can pollute the air and harm health. It also does not produce a significant amount of waste liquid like some chemical cleaning methods, which can contaminate rivers, soil, and water quality. The water jet cleaning with pure water as the medium is odorless, tasteless, and non-toxic. After atomization, the emitted jet can also reduce the dust concentration in the working area, lowering the atmospheric dust level from 80mg/m³ using other methods to below the national safety standards, thus causing no pollution.
3. Pipe Scale
(1) Classified by chemical composition, they can be categorized into carbonate scale, sulfate scale, silicate scale, and mixed scale, etc. The main components of carbonate scale are calcium carbonate and magnesium carbonate; the main components of sulfate scale and silicate scale are calcium sulfate and silicate compounds, respectively.
(2) Categorized by physical properties, there are two types: scale that firmly adheres to the pot shell and pipe walls, and sediment that is loose and easily detached.
Scale is primarily formed when salts like calcium and magnesium in the boiler feedwater precipitate and adhere to the metal surface upon heating. The thermal conductivity of scale is very low, around 2 to 5 times that of ordinary steel. Scale deposited on the boiler's heating surface significantly worsens heat transfer efficiency, affecting the boiler's performance; it can easily cause metal materials to burn due to localized overheating, even leading to pipe explosion accidents; it also accelerates galvanic corrosion, causing pipeline scale corrosion and speeding up the damage to the heating surface. Once scale forms, it should be promptly removed using mechanical or chemical methods.
Heat exchanger and refrigeration equipment cleaning, choose GreenChem for reliability.
