Clean various heat exchangers, condensers, industrial pipelines, boilers, and steam power plant condensers. GlanChem cooperation is guaranteed.

Jining Green Chemical Technology Co., Ltd. (abbreviated to Jining Green Cleaning Co.) was established in 2010 and is a professional company specializing in cleaning various industrial heat exchange equipment. The company has comprehensive business philosophy and the capability to research and develop industrial equipment cleaning technology. We undertake cleaning services for industrial, private enterprises, corporate chemical equipment, power plant equipment, condensers, boilers, and boiler air preheaters; as well as air conditioning cleaning, heat exchange equipment cleaning, and cleaning of machinery and chemical equipment. We also handle cleaning of refrigeration equipment and heating equipment for scale removal.
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Jining Green Clean Co. stocks dozens of cleaning machines ranging from 10mpa to 250mpa, and over a dozen chemical cleaning pump stations. Our primary services include power plants, chemical factories, oil refineries, food processing plants, corporate entities, heating equipment, etc. The company also provides long-term industrial heat exchanger cleaning and design solutions for industry clients.

Our company has newly acquired domestic cleaning machines and imported cleaning equipment. We have hired experienced technical specialists in the cleaning industry to achieve standardized and standardized cleaning of heat exchange equipment.

Chemical Cleaning Scale Removal Process

Recirculating Closed Loop Cleaning

Recirculating cleaning utilizes two existing parallel ash removal pipelines to form a loop, creating a recirculation system with the cleaning pump station. A certain concentration of acidic solution is added, which circulates through the ash water pipeline for cleaning. As the acid washing reaches a certain level, the acidic 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 shut down, and it is complex and costly.

Open channel cleaning

During cleaning, it's crucial to avoid a loop formed by two grey pipes. 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 certain concentration of cleaning solution in the mixing tank, and then continuously or intermittently injecting it into the grey pipe. This process requires additional cleaning equipment to be added during shutdown, resulting in higher costs.

Continuous operation cleaning

The process involves continuously injecting a certain amount of acidic solution while the ash pipeline operates normally without interruption. Simultaneously, a certain quantity of ash pipeline running cleaning inhibitor and pipeline descaling agent is added for open-circuit cleaning. The main function of the cleaning aid is to promote the reaction between the acidic solution and ash scale at a certain concentration and flow rate, while increasing its solubility in water and reducing the occurrence of air blockage, ensuring the quality of ash pipeline cleaning.

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 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.
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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, ease of operation, and safety.
Advantages of high-pressure water technology include:

(1) Excellent Cleaning Quality: During high-pressure water jet cleaning of pipes and internal surfaces of heat exchangers, all scale and obstructions within the pipes are thoroughly removed, revealing the metal substrate. The high-pressure water jet, with its immense energy and supersonic speed, can completely destroy hard scales and obstructions without causing any damage to the metal.

The high-pressure water pressure is less than the tensile strength grade of metal, so high-pressure cleaning will not damage the surface being cleaned.
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(2) Fast Cleaning Speed: Due to the combined action of jet washing, splitting, shearing, and grinding, scale 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.

Components cleaned with high-pressure water jetting do not require secondary cleaning; however, after chemical cleaning, the surface needs to be washed off with clean water.
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(3) No Environmental Pollution: Since high-pressure water jet cleaning uses pure water as the medium, it does not produce a large amount of dust like sandblasting, shot blasting, or simple mechanical cleaning, which can pollute the atmosphere and harm health. It also does not generate a significant amount of waste liquid like some chemical cleaning methods, which can contaminate rivers, soil, and water quality. The water jet cleaning using pure water is odorless, tasteless, and non-toxic. After atomization, it can also reduce the dust concentration in the work area, lowering atmospheric dust from 80mg/m³ using other methods to below the national safety standards, thus causing no pollution.

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3. Pipe Scale

(1) Categorizing by chemical composition, there are various types such as carbonate scale, sulfate scale, silicate scale, and mixed scale. The main components of carbonate scale are calcium carbonate and magnesium carbonate; for sulfate and silicate scales, the primary components are calcium sulfate and silicate compounds, respectively. Mixed scale is often a mixture of the above three types.
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(2) Classified by physical properties, there are two types: a) Scale that is firmly adhered to the pot shell and pipe walls, and b) Sediment that is loosely textured and easily detached.
Scale primarily forms due to the salts of calcium and magnesium present in the boiler feedwater, which precipitate and adhere to the metal surface upon heating. The thermal conductivity of scale is very low, approximately 2 to 5 times that of ordinary steel. Scale buildup on the boiler's heating surface significantly worsens heat transfer efficiency, affects the boiler's performance; it can easily cause metal materials to burn due to local 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 & Refrigeration Equipment Cleaning - Choose Green Chemical for Reliability