Clean various heat exchangers, condensers, industrial pipelines, boilers, and steam power plant condensers. Glan Chemical Co., Ltd. offers guaranteed cooperation.

Jining Green Chemical Technology Co., Ltd. (简称 Jining Green Cleaning Co.) was established in 2010 and is a professional company specializing in the cleaning of various industrial heat exchange equipment. The company has comprehensive business philosophy and the capability to develop industrial equipment cleaning technologies, undertaking cleaning services for industrial, private enterprises, corporate chemical equipment, power plant equipment, condensers, boilers, and boiler air preheaters; as well as air conditioning and heat exchange equipment cleaning. We also handle cleaning of machinery and chemical equipment, and descaling of refrigeration and heating equipment.

Jining Grean Cleaning Company stocks dozens of cleaning machines ranging from 10mpa to 250mpa, as well as over a dozen chemical cleaning pump stations. Our primary services are provided to power plants, chemical factories, oil refineries, food processing plants, corporate entities, and heating equipment. Additionally, the company has been offering industrial heat exchanger cleaning and design solutions to industry clients for an extended period.

Our company has recently purchased domestic cleaning machines and imported cleaning equipment. We have hired experienced technical experts in the cleaning industry, which has enabled the cleaning of heat exchange equipment to be standardized and standardized.

Chemical cleaning scale removal process:

Recirculating closed-loop cleaning

Recirculation cleaning utilizes two original parallel ash removal pipelines to form a loop, creating a circulating system with the cleaning pump station. A solution of a certain concentration is added, which circulates within the ash water pipes for cleaning. As the acid cleaning reaches a certain level, acid is continuously replenished. For short-distance single ash water pipelines, if conditions permit, a temporary pipeline can be laid to form a circulating loop for cleaning. This process must be carried out while the system is offline, and it is complex and costly.
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Pilot Cleaning

No two grey pipes should form a loop during cleaning; 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 device, 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 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 specific quantity of ash-pipe running cleaning inhibitor and pipeline descaling agent. This is an open-circuit cleaning method. The primary function of the cleaning aids 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 and reducing the occurrence of air blockages, 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 sludge pipe operation by considering the sludge water flow rate and acidity. During cleaning, take a sample at the front sampling point 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 machinery
High-pressure water jetting is used for cleaning, offering advantages such as high efficiency, low cost, non-damaging to workpieces, environmental friendliness, ease of operation, and safety.
Advantages of high-pressure water technology include:

(1) Excellent Cleaning Quality: High-pressure water jet cleaning of pipes and the inner holes of heat exchangers can completely remove scale and obstructions from within the pipes, revealing the metal surface. The high-pressure water jet, with its immense energy and supersonic speed, is capable of completely destroying hard scale and obstructions 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) Rapid Cleaning Speed: Due to the combined action of water jet washing, wedge splitting, shearing, and abrasion, scaling can be quickly broken and removed, making the cleaning speed 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, after chemical cleaning, the surface needs to be rinsed with clear 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 large amounts of dust like sandblasting, shot blasting, or simple mechanical cleaning, which can pollute the atmosphere and harm health. Nor does it generate large quantities 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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Pipe Scale

(1) Categorized by chemical composition, they include carbonate scale, sulfate scale, silicate scale, and mixed scale. The main components of carbonate scale are calcium carbonate and magnesium carbonate; the primary components of sulfate and silicate scales are calcium sulfate and silicate compounds, respectively. Mixed scale is usually a mixture of the aforementioned three types.
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(2) Classified by physical properties, there are two types: hard scale that firmly adheres to the pot and tube walls, and loose sediment that is 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, affecting the boiler's performance; it can easily cause metal materials to burn due to local overheating, even leading to pipe burst accidents; it also accelerates galvanic corrosion, causing pipeline scale corrosion, and speeds 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