Clean all types of heat exchangers, condensers, industrial pipelines, boilers, and power plant equipment condensers. Greenclean Chemicals ensures cooperation.

Jining Greentech Chemical Technology Co., Ltd. (abbreviated as Jining Greentech 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 research and develop industrial equipment cleaning technology. We undertake cleaning services for industrial, private enterprise, and corporate chemical equipment, power station equipment, power plant 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.

Jining Green Cleaning Company has dozens of cleaning machines in various models ranging from 10mpa to 250mpa, and more than a dozen chemical cleaning pump stations. Our main services include power plants, chemical factories, oil mills, food factories, corporate and institutional units, heating equipment, etc. The company also provides long-term industrial heat exchanger cleaning and solution design services to 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 descaling cleaning process:

Recirculating closed-loop cleaning

Recirculating cleaning utilizes two original parallel deslagging pipelines to form a circuit, which, along with the cleaning pump station, creates a recirculation system. A solution of a certain acidity is added, and it circulates within the sludge water pipeline for cleaning. Additionally, as the acidity wash reaches a certain level, more acid solution is continuously replenished. For short-distance single sludge water pipelines, if conditions permit, a temporary pipeline can be laid to create a recirculation circuit for cleaning. This process must be carried out when the system is shut down, and it is complex and costly.

Open path cleaning

No two gray pipes can form a loop during cleaning; only a single gray pipe can be used for open circuit cleaning. The method involves connecting one end of the gray pipe to the cleaning unit, continuously preparing a specific concentration of cleaning solution in the mixing tank, and then continuously or intermittently injecting it into the gray pipe. This process requires additional cleaning equipment during shutdown, resulting in higher costs.

Continuous operation cleaning

The process involves continuously injecting a certain amount of acidic solution while operating, without interrupting the normal ash transportation through the ash pipe. Simultaneously, a specific quantity of ash pipe operation cleaning inhibitor and pipeline descaling agent is added for 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 enhancing 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 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 cleaner based on the sludge water flow rate and acidity. During cleaning, take a sample at the sampling point at the front 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 considered complete.


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 pipe and heat exchanger bores effectively removes all scale and obstructions from within the pipes, revealing the metal surface. The high-pressure water jet, with its immense energy and supersonic speed, can completely destroy 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 substrate being cleaned.

(2) Fast Cleaning Speed: Due to the combined crushing effects of water jet washing, wedging, 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.

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

(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 large volumes 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. 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, 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.

(2) Categorized by physical properties, there are two types: hard scale that firmly adheres to the pot shell and tube walls, and loose sediment that is easy to dislodge.
Scale is primarily formed by 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, around 2 to 5 times that of ordinary steel. The accumulation of scale on the boiler's heat-absorbing surface significantly worsens heat transfer efficiency, affecting the boiler's performance; it can easily lead to the burning or even bursting of metal pipes due to local overheating; it also accelerates galvanic corrosion, causing pipeline scale corrosion and speeding up the deterioration of the heated surfaces. Once scale forms, it should be promptly removed using either mechanical or chemical methods.

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