Clean various heat exchangers, condensers, industrial pipelines, boilers, and steam power plant condensers. Glan Chemical Co., Ltd. offers guaranteed 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 possesses comprehensive business philosophy and the capability to research and develop industrial cleaning technologies, undertaking cleaning services for industrial, private enterprise, and corporate chemical equipment, power station equipment, condensers of power plants, 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 scale removal for refrigeration and heating equipment.

Coking Plant Initial Cooler Cleaning, Condenser High-Pressure Water Cleaning in Dong'e, Liaocheng, Shandong

Jining Green Cleaning Company stocks dozens of cleaning machines ranging from 10mpa to 250mpa, as well as over a dozen chemical cleaning pump stations. Our main services include power plants, chemical factories, oil mills, food factories, corporate entities, heating equipment, and more. The company also offers 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 experts in the cleaning industry, enabling the cleaning of heat exchange equipment to be standardized and standardized.

Coking Plant Primary Cooler Cleaning, Condenser High-Pressure Water Cleaning in Dong'e, Liaocheng, Shandong

Chemical Cleaning Scale Removal Process

Recirculating Closed Circuit Cleaning

Recirculation cleaning utilizes two existing parallel ash piping lines to form a circuit, creating a recirculation system with the cleaning pump station. A solution of a certain acidity concentration is added, which circulates through the ash water pipes for cleaning. As the acid washing 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 create a recirculation circuit for cleaning. This process must be carried out while the system is shut down, and it is complex and costly.

Coking Plant Pre-cooler Cleaning, Condenser High-pressure Water Cleaning in Dong'e, Liaocheng, Shandong

Open Channel Cleaning

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

Coking Plant Initial Cooler Cleaning, Condenser High-Pressure Water Cleaning in Dong'e, Liaocheng, Shandong

Continuous cleaning without shutdown

This process involves continuously injecting a certain amount of acidic solution into the ash pipe while operating under normal ash transport conditions, simultaneously adding a specific quantity of ash pipe running cleaning inhibitor and pipeline descaler for open-loop cleaning. The primary role 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 and reducing the formation of gas blockages, ensuring the quality of ash pipe cleaning.

The procedure is: 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 ash slurry pipeline for the addition of corrosion inhibitors and pipeline cleaner descaler. During cleaning, take samples at the front sampling point of the ash pipeline every 30 minutes to test the acidity and strictly control it by adjusting the acid flow rate. In the later stage of cleaning, take samples at the end of the ash pipeline 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.


2. High-pressure water jet cleaning equipment
High-pressure water jet cleaning offers advantages such as high efficiency, low cost, non-damaging to workpieces, environmental friendliness, ease of operation, and safety.
The high-pressure water technology boasts the following advantages.

(1) Excellent Cleaning Quality: The high-pressure water jet cleaning for pipes and heat exchanger bores can thoroughly remove scale and blockages inside, revealing the metal surface. With its immense energy and supersonic speed, 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 compressive strength 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, wedge splitting, 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.

Parts cleaned with high-pressure water jetting do not require secondary cleaning; however, after chemical cleaning, the surface needs to be rinsed with clean water.

(3) No Environmental Pollution: Since high-pressure water jet cleaning uses pure water as the medium, it does not produce a large amount of dust like sandblasting, shot blasting, or simple mechanical cleaning, which can pollute the atmosphere 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 cleaning with pure water as the medium 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, thus causing no pollution.

Pipe Scale

(1) Categorized by chemical composition, it includes carbonate scale, sulfate scale, silicate scale, and mixed scale, among others. 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 firmly adheres to the pot shell and tube walls, and sediment that is loosely textured and easily detachable.
Scale primarily forms due to the salts of calcium and magnesium present in the boiler feed water, 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, affects the boiler's performance; it can easily cause metal materials to burn due to local overheating, even leading to pipe 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.

Heat Exchanger and Refrigeration Equipment Cleaning - Choose GreenChem for Reliability