Clean various heat exchangers, condensers, industrial pipelines, boilers, and steam power plant condensers. Glan Chemical Co., Ltd. offers guaranteed cooperation.
Jining Greentech Chemical Technology Co., Ltd. (简称 Jining Greentech 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 equipment cleaning technology. It undertakes cleaning services for industrial, private enterprise, and corporate chemical equipment, power station equipment, power plant condensers, boilers, and economizers. Additionally, it provides air conditioning and heat exchange equipment cleaning, as well as mechanical and chemical equipment cleaning. The company also handles the cleaning of refrigeration and heating equipment to remove scale.
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Jining Grean Cleaning Co. offers a wide range of cleaning machines from 10mpa to 250mpa, with dozens of units in stock, and over a dozen chemical cleaning pump stations. Our main services are provided to power plants, chemical factories, oil refineries, food processing plants, corporate entities, and heating equipment. Additionally, the company has been long-term engaged in industrial heat exchanger cleaning and solution design for industry clients.
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Our company has newly acquired domestic cleaning machines and imported cleaning equipment. We have hired experienced technical specialists in the cleaning industry to standardize and regulate the cleaning of heat exchange equipment.
Chemical Cleaning Scale Removal Process
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Recirculating Closed Loop Cleaning
Recirculation cleaning utilizes two original parallel descaling pipelines 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 and cleans within the sludge water pipeline. As the acid washing decreases to a certain extent, acid is continuously replenished. For short-distance single sludge 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 shut down, and it is complex and costly.
Breakbulk Cleaning
No two grey pipes should form a loop during cleaning; only single grey pipe open-circuit cleaning is allowed. The method involves connecting one end of the grey pipe to the cleaning unit and continuously preparing a specific concentration of cleaning solution in the mixing tank, then injecting it into the grey pipe continuously or intermittently. This process requires the addition of cleaning equipment during shutdown, resulting in higher costs.
Continuous operation cleaning
The process involves continuously injecting a certain amount of acidic solution while the ash pipeline is operating normally without interruption, simultaneously introducing a certain amount of ash pipeline operation cleaning inhibitor and pipeline descaling agent. This is an open-loop cleaning process. The primary function of the cleaning aids is to promote the reaction between the acidic solution and the ash scale at a specific concentration and flow rate, while also increasing its solubility in water, reducing the occurrence of air blockages, and ensuring the quality of ash pipeline cleaning.
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The procedure is as follows: Before cleaning, first estimate the required acid amount based on the total scale in the pipeline. Then, calculate the acid addition rate and the flow rate of the descaling agent and pipeline cleaning agent by considering the sludge water 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 stages 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.
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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 protection, easy operation, and safety.
Advantages of high-pressure water technology include:
(1) High-quality cleaning: During the high-pressure water jet cleaning of pipe and heat exchanger bores, it can completely remove scaling and blockages from inside the pipes, revealing the metal surface. The high-pressure water jet, with its immense energy and supersonic movement, is fully capable of destroying hard scaling and blockages, yet it has no detrimental effect on the metal.
Due to the pressure of high-pressure water being less than the compressive strength grade of metal, high-pressure cleaning will not damage the substrate being cleaned.
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(2) Fast Cleaning Speed: Due to the combined effects of jet washing, splitting, shearing, and grinding, scaling can be quickly broken and removed, which is several to ten times faster than traditional chemical methods, sandblasting and shot peening techniques, simple mechanical, and manual cleaning methods.
Additionally, parts cleaned with high-pressure water jetting do not require secondary cleaning; however, after chemical cleaning, the surface must be rinsed with clear water.
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(3) Non-Environmental Pollution: Since high-pressure water jet cleaning uses clean water as the medium, it does not produce a large amount of dust like sandblasting, grit-blasting, or simple mechanical cleaning, which can pollute the atmosphere and harm health. It also does not generate large volumes of waste liquid like some chemical cleaning methods, which can contaminate rivers, soil, and water quality. The water jet cleaning with clean water as the medium is odorless, tasteless, and non-toxic. After atomization, the emitted jet can also reduce the dust concentration in the work area, lowering atmospheric dust levels from 80mg/m³ with other methods to below the national safety standards. Therefore, it does not cause any pollution.
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3. Pipe Scale
(1) Classified by chemical composition, it can be divided 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; mixed scale is usually a mixture of the above three types of scales.
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(2) Categorized by physical properties, there are two types: scale that is firmly adhered to the pot shell and tube walls, and sediment that is loosely textured and easy to dislodge.
Scale is primarily formed by the salts, such as calcium and magnesium, contained in the boiler feed water, which precipitate and adhere to the metal surface upon heating. The thermal conductivity of scale is very low, around 2-5 times that of ordinary steel. Scale buildup on the boiler's heating surface significantly worsens heat transfer efficiency, affects boiler performance; it can easily cause metal materials to burn out due to localized overheating, even leading to pipe explosion accidents; it also accelerates galvanic corrosion, causing pipeline scale corrosion and speeding up the deterioration of the heating surface. Once scale forms, it should be promptly removed using either mechanical or chemical methods.
Heat Exchanger & Refrigeration Equipment Cleaning - Choose GreenChem for Assurance
