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 boasts comprehensive business philosophy and the capability to develop industrial equipment cleaning technologies. We undertake cleaning services for industrial, private enterprise, and 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 and descaling of refrigeration and heating equipment.

Jining Green Clean Company stocks dozens of cleaning machines with various models ranging from 10mpa to 250mpa, as well as 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 solution design services 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 standardization and normalization of heat exchanger cleaning.

Chemical Cleaning Scale Removal Process

Recirculating closed-loop cleaning

Recirculating cleaning utilizes two existing parallel desulfurization pipelines to form a loop with the cleaning pump station. A certain concentration of acidic solution is added, and the slurry pipes are circulated for cleaning. As the acid cleaning reaches a certain level, the acidic solution is continuously replenished. For short-distance single slurry pipelines, if conditions permit, a temporary pipeline can be laid to form a recirculating loop for cleaning. This process must be carried out when the system is offline, and it is complex and costly.

Open Channel 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 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 the addition of cleaning equipment during shutdown, which increases the cost.

Continuous operation cleaning

The process involves continuously injecting a certain amount of acidic solution while the ash pipe is operating normally and not shut down, 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: Prior to 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 pipeline's corrosion inhibitor and pipeline cleaner based on the sludge flow rate and acidity. During cleaning, take a sample at the front of the sludge pipeline every 30 minutes to test acidity, and strictly control it by adjusting the acid flow rate. In the later stage of cleaning, test the pH value at the end of the sludge pipeline every 15 minutes. 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, non-polluting the environment, easy operation, and safety.
High-pressure water technology boasts the following advantages.

(1) Excellent Cleaning Quality: High-pressure water jet cleaning of pipes and heat exchanger bores can completely remove scale and blockages inside, revealing the metal substrate. With immense energy and moving at supersonic speeds, the high-pressure water jet is fully capable of destroying hard scale and blockages without causing any damage to the metal.

Since the pressure of high-pressure water is less than the pressure resistance grade of metal, high-pressure cleaning will not damage the base material being cleaned.

(2) Fast Cleaning Speed: Due to the combined action of jet washing, 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, simple mechanical, and manual methods.

Additionally, components cleaned with high-pressure water jetting do not require secondary cleaning; however, after chemical cleaning, the surface chemical must be rinsed off with clear water.

(3) No Environmental Pollution - Since high-pressure water jet cleaning uses pure water as the medium, it does not generate large amounts of dust like sandblasting, shot blasting, or simple mechanical cleaning, which can pollute the atmosphere 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 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 with other methods to below the national safety standards. Therefore, it does not cause any pollution.

Pipe Scale

(1) Categorized by chemical composition, they include carbonate scale, sulfate scale, silicate scale, and mixed scale, among others. The primary components of carbonate scale are calcium carbonate and magnesium carbonate; for sulfate and silicate scales, the main components are calcium sulfate and silicate compounds, respectively.

(2) Categorized by physical properties, there are two types: water scale that is firmly adhered to the pot shell and tube walls, and sediment that is loosely textured and easily detached.
Scale primarily forms due to the salts like calcium and magnesium in the boiler feed water that 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 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, potentially leading to tube 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.

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