Clean all types of heat exchangers, condensers, industrial pipelines, boilers, and steam power plant condensers. Glan Chemicals guarantees cooperation.

Jining Greentech Chemical Technology Co., Ltd. (简称 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 develop industrial equipment cleaning technology, undertaking cleaning services for industrial, private enterprises, 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 mechanical and chemical equipment, and descaling of refrigeration and heating equipment.

Jining Green Clean Company 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, and more. 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 standardize and normalize the cleaning process for heat exchange equipment.

Copper Tube Condenser Cleaning in Linyi, Dezhou, Shandong

Chemical Cleaning Scale Removal Process

Recirculating Closed-loop Cleaning

Recirculating cleaning utilizes two existing parallel ash discharge pipelines to form a loop, creating a recirculation system with the cleaning pump station. It introduces a solution of a certain acidity concentration, which circulates through the ash water pipes for cleaning. As the acid cleaning reaches a certain level, the solution is continuously replenished with acid. 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 when the system is offline, and it is complex and costly.
Copper Tube Condenser Cleaning in Linyi, Dezhou, Shandong

Open channel cleaning

No two gray pipes should form a loop during cleaning; only single-pipe open circuit cleaning is allowed. The method involves connecting one end of the gray pipe to the cleaning unit, continuously preparing a certain concentration of cleaning solution in the dosing tank, and then continuously or intermittently injecting it into the gray pipe. This process requires the addition of cleaning equipment during shutdown, resulting in higher costs.

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 operation cleaning inhibitor and pipeline descaling agent, and performing an open-loop cleaning. 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, 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 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 based on 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 considered complete.

Copper Tube Condenser Cleaning in Linyi, Dezhou, Shandong

2. High-pressure water cleaning equipment:
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.
Advantages of high-pressure water technology include:

(1) High-quality cleaning: During the high-pressure water jet cleaning of pipe and heat exchanger bores, all scale and blockages inside the pipes are thoroughly removed, revealing the metal surface. The high-pressure water jet, with its immense energy and supersonic speed, is fully capable of destroying hard scale and blockages, but has no damaging effect on 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 crushing effects of water jet washing, splitting, shearing, and grinding, scaling can be quickly broken and removed, several to tens of 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 must be washed with clean water.
Copper Tube Condenser Cleaning in Linyi, Dezhou, Shandong

(3) No Environmental Pollution: Since high-pressure water jet cleaning uses pure water as the medium, it does not generate a large amount of dust like sandblasting 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, 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.

3. Pipe Scale

(1) Categorized by chemical composition, they can be divided into carbonate scale, sulfate scale, silicate scale, and mixed scale. 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: water scale that is firmly adhered to the pot shell and pipe walls, and sediment that is loosely textured and easy to detach.
Lime scale primarily forms due to the salts like calcium and magnesium 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 to 5 times that of ordinary steel. When lime scale accumulates on the boiler's heating surface, it significantly worsens the heat transfer efficiency, affecting the boiler's performance; it can easily cause metal materials to burn due to localized overheating, even leading to pipe explosion accidents; it also accelerates galvanic corrosion, causing pipeline lime scale corrosion and speeding up the damage to the heating surface. Once lime scale forms, it should be promptly removed using mechanical or chemical methods.

Heat Exchanger and Refrigeration Equipment Cleaning - Choose GreenChem for Reliability