Clean various heat exchangers, condensers, industrial pipelines, boilers, and steam power plant condensers. Glan Chemical Co. 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 cleaning various industrial heat exchange equipment. The company has comprehensive business philosophy and the capability to research and develop industrial cleaning technologies. 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 Greentech Cleaning Co. offers a wide range of cleaning machines, from 10mpa to 250mpa models, with dozens of units in stock, 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, heating equipment, and more. The company also provides long-term industrial heat exchanger cleaning and solution design services to clients in the industry.

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 regulate the cleaning process of heat exchange equipment.

Chemical cleaning descaling process:

Recirculating Closed Circuit Cleaning

Recirculating cleaning utilizes two existing parallel ash piping lines to form a loop, creating a recirculation system with the cleaning pump station. A certain concentration of acidic solution is added, which circulates through the ash water pipes for cleaning. As the acid washing reaches a certain level, the acidic solution is continuously replenished. 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 while the system is shut down, and it is complex and costly.

Preliminary Cleaning

During cleaning, it is imperative that no two grey pipes form a loop; only single-pipe cleaning is allowed. The method involves connecting one end of the grey pipe to the cleaning unit and continuously preparing a certain concentration of cleaning solution in the mixing tank, then injecting it into the grey pipe continuously or intermittently. This process requires the addition of cleaning equipment while the system is shutdown, which is costly.

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 role 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 formation 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 for the addition of corrosion inhibitors and pipeline cleaning detaching agents according to the sludge water flow and acidity. During the cleaning process, take a sample at the front end of the sludge pipe every 30 minutes to test the acidity, and strictly control the acidity by adjusting the flow rate of acid addition. 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 process can be considered 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 advantages of high-pressure water technology include:

(1) Excellent Cleaning Quality - High-pressure water jet cleaning of pipe interiors and heat exchanger bores can thoroughly remove scale and obstructions, revealing the metal surface. With its immense energy and ultra-sonic speed, the high-pressure water jet is capable of completely destroying tough scale and obstructions without damaging 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 effects of water jet scouring, wedging, shearing, and abrasion, scaling can be quickly broken and removed, making the cleaning speed several to tens of times faster than traditional chemical methods, sandblasting, simple mechanical, and manual 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 - Since high-pressure water jet cleaning uses clean water as the medium, it does not produce a large amount of dust like sandblasting, grit blasting, or simple mechanical cleaning, which can pollute the air and harm health. Nor does it generate a large amount of waste liquid like some chemical cleaning methods, which can contaminate rivers, soil, and water quality. The water jet, using clean 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 with other methods to below the national safety standards, thus causing no pollution.

Pipe Scale

(1) Classified by chemical composition, they can be categorized into 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: a hard scale that firmly adheres to the pot shell and pipe walls, and a loose sediment that is easily detached.
Lime scale primarily forms due to the salts of 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, about 2 to 5 times that of ordinary steel. When lime scale accumulates on the boiler's heating surface, it severely degrades heat transfer efficiency and affects the boiler's performance; it can also easily cause metal materials to burn due to localized overheating, potentially leading to pipe explosion accidents; it accelerates galvanic corrosion, causing pipeline lime scale corrosion, and speeds up the deterioration of 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