Clean various heat exchangers, condensers, industrial pipelines, boilers, and steam power plant condensers. GlanChem partnership is guaranteed.

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 has comprehensive business concepts 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; air conditioning cleaning, heat exchange equipment cleaning, mechanical equipment and chemical equipment cleaning; as well as cleaning and descaling of refrigeration and heating equipment.

Jining Grean Cleaning Company stocks dozens of cleaning machines ranging from 10mpa to 250mpa, and over a dozen chemical cleaning pump stations. Our main services are provided to power plants, chemical factories, oil refineries, food processing plants, corporate entities, heating equipment, and more. The company also offers long-term industrial heat exchanger cleaning and design services to industry clients.

Our company has newly acquired domestic cleaning machines and imported cleaning equipment. We've hired experienced technical specialists in the cleaning industry to achieve standardized and standardized cleaning of heat exchange equipment.

Chemical Cleaning Scale Removal Process

Recirculating Closed Circuit Cleaning

Recirculating cleaning utilizes two existing parallel ash pipelines to form a loop, creating a circulation system with the cleaning pump station. A certain concentration of acidic solution is added, which circulates within the ash water pipeline for cleaning. As the acid washing decreases to 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.

Open Channel Cleaning

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

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 certain quantity of ash pipe operation cleaning inhibitor and pipeline cleaning descaler for open-loop cleaning. The primary function of the cleaning aids is to promote the reaction between the acidic solution and ash deposits at a specific concentration and flow rate, while also increasing its solubility in water and reducing the occurrence of airlock, ensuring the quality of ash pipe cleaning.

The procedure is as follows: Prior to cleaning, 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 by considering the sludge water flow rate 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 it by adjusting the acid flow rate. In the later stage of cleaning, test the pH value at the end of the sludge pipe every 15 minutes. When the pH value reaches a certain level and remains unchanged for 30 minutes, the cleaning process can be deemed complete.


2. High-pressure water 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.
High-pressure water technology boasts the following advantages.

(1) Excellent cleaning quality: During the high-pressure water jet cleaning of pipeline and heat exchanger bores, it can completely remove scaling and obstructions from the inside of the pipes, revealing the metal substrate. The high-pressure water jet, with its immense energy and supersonic speed, can fully disrupt hard scaling and obstructions without causing any damage to the metal.

High-pressure water cleaning will not damage the substrate being cleaned, as the pressure is less than the tensile strength grade of the metal.

(2) Fast Cleaning Speed: Due to the combined effects of jet washing, wedge splitting, shearing, and abrasive cutting, scale can be quickly broken and removed, several to ten times faster than traditional chemical methods, sandblasting, ball-blasting methods, simple mechanical, and manual cleaning techniques.

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

(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, shot blasting, or simple mechanical cleaning, which can pollute the atmosphere and harm health. It also does not produce a large volume 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 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, 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: scale that is firmly adhered to the pot shell and pipe walls, and sediment that is loosely textured and easily detached.
Lime scale primarily forms due to the salts like calcium and magnesium present in the boiler feedwater, which precipitate and adhere to the metal surface upon heating. Lime scale has a very low thermal conductivity, around 2 to 5 times that of ordinary steel. When lime scale accumulates on the boiler's heat-absorbing surface, it severely diminishes heat transfer efficiency, affecting the boiler's performance; it can also cause metal materials to burn out due to localized overheating, even leading to pipe explosion accidents; it accelerates galvanic corrosion, causing pipeline lime scale corrosion, and speeding up the deterioration of the heated surfaces. Once lime scale forms, it should be promptly removed using either mechanical or chemical methods.

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