Clean various heat exchangers, condensers, industrial pipelines, boilers, and steam power plant condensers. Greentech Chemicals guarantees cooperation.

Jining Green Chemical Technology Co., Ltd. (简称 Jining Green Cleaning Co.) was established in 2010 and specializes in the cleaning of various industrial heat exchange equipment. The company boasts comprehensive business philosophy and the capability to develop industrial cleaning technologies, undertaking cleaning services for industrial, private, corporate chemical equipment, power plant equipment, condensers in power plants, boilers, and boiler air preheaters; air conditioning cleaning, heat exchange equipment cleaning, and mechanical and chemical equipment cleaning. Additionally, we offer cleaning services for refrigeration and heating equipment to remove scale.
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Jining Grean Cleaning Co. has dozens of cleaning machines with pressure ratings ranging from 10mpa to 250mpa, as well as over a dozen chemical cleaning pump stations. Our main services are provided to power plants, chemical factories, oil refineries, food processing plants, corporate entities, heating equipment, and more. The company also offers 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've hired experienced technical experts in the cleaning industry to standardize and regulate the cleaning process of heat exchange equipment.

Chemical Cleaning Scale Removal Process

Recirculating Closed Circuit Cleaning

Recirculating cleaning utilizes two existing parallel deslagging pipelines to form a loop, creating a recirculation system with the cleaning pump station. A certain concentration of acidic solution is added, which circulates within the sludge water pipes for cleaning. As the acid cleaning reaches a certain level, the acidic solution 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 during shutdown and is complex, with higher costs.
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Preliminary cleaning

No two ash pipes should form a loop during cleaning; only a single ash pipe should be used for open circuit cleaning. The method involves connecting one end of the ash 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 ash pipe. This process requires adding cleaning equipment during shutdown, which increases costs.
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Continuous operation cleaning

The process involves continuously injecting a certain amount of acidic solution while the ash pipe is operating normally without interruption, simultaneously adding a certain amount of ash-pipe-running cleaning inhibitor and pipeline descaling agent, and performing open-loop cleaning. The primary function of the cleaning aid is to promote the reaction between the acidic solution and the ash scale at a certain concentration and flow rate, while also increasing its solubility in water, reducing the formation of air blockages, 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 cleaning agent according to 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 cleaning machinery:
High-pressure water jet cleaning offers advantages such as high efficiency, low cost, non-damaging to workpieces, non-polluting to the environment, easy operation, and safety.
High-pressure water technology boasts the following advantages.

(1) Excellent Cleaning Quality: High-pressure water jet cleaning of pipe and heat exchanger bores can completely remove scale and blockages inside, revealing the metal substrate. The high-pressure water jet, with its immense energy and supersonic speed, is capable of completely destroying hard scale and blockages without causing any damage to 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 base material being cleaned.
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(2) Fast Cleaning Speed: Due to the combined actions 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, simple mechanical, and manual cleaning methods.

Components cleaned with high-pressure water jetting do not require secondary cleaning; however, after chemical cleaning, the surface must be washed with clean water.
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(3) No Environmental Pollution: As high-pressure water jet cleaning uses pure water as the medium, it does not produce large amounts of dust like sandblasting or simple mechanical cleaning, which can pollute the air and harm health. Nor does it generate a significant amount of waste liquid like some chemical cleaning methods, which can contaminate rivers, soil, and water quality. The water jet, 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 levels from 80mg/m³ using other methods to below the national safety standards, thus ensuring no pollution is caused.

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3. Pipe Scale

(1) Classified by chemical composition, they include carbonate scale, sulfate scale, silicate scale, and mixed scale. The primary components of carbonate scale are calcium carbonate and magnesium carbonate; sulfate scale and silicate scale are mainly composed of 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: scale that firmly adheres to the pot shell and pipe walls, and sediment that is loose and easily detached.
Lime scale primarily forms due to the salts like calcium and magnesium present in the boiler feed water, which precipitate and adhere to the metal surface upon heating. Lime scale has a very low thermal conductivity, approximately 2-5 times that of ordinary steel. When lime scale accumulates on the boiler's heating surface, it severely degrades heat transfer efficiency and affects the boiler's performance; it can also easily damage metal materials due to localized overheating, potentially leading to pipe explosion accidents; it accelerates galvanic corrosion, causing pipeline lime scale corrosion, and speeds up the deterioration of the heating surface. Once lime scale forms, it should be promptly removed using mechanical or chemical methods.

Heat Exchanger & Refrigeration Equipment Cleaning - Choose GreenChem for Reliability