Clean various heat exchangers, condensers, industrial pipelines, boilers, and steam power plant condensers. Glan Chemical Co., Ltd. offers guaranteed cooperation.

Jining Green Chemical Technology Co., Ltd. (简称 Jining Green Cleaning Co.) was established in 2010 and specializes in cleaning various industrial heat exchange equipment. The company boasts comprehensive business philosophy and the capability to research and develop industrial cleaning technologies. We undertake cleaning services for industrial, private enterprise, corporate chemical equipment, power plant equipment, condensers, boilers, and economizers. We also handle air conditioning cleaning, heat exchange equipment cleaning, and cleaning of machinery and chemical equipment. In addition, we provide cleaning services for refrigeration equipment and heating equipment, including descaling.

Jining Greentech Cleaning Co. offers a variety of cleaning machines from 10mpa to 250mpa, with dozens of units and over a dozen chemical cleaning pump stations. Our primary services are to power plants, chemical factories, oil refineries, food processing plants, corporate entities, and heating equipment. The company also provides long-term industrial heat exchanger cleaning and 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 normalize the cleaning of heat exchange equipment.

Chemical Cleaning Scale Removal Process

Recirculating Closed Loop Cleaning

Recirculating cleaning utilizes two existing parallel ash line pipes to form a loop, creating a recirculation system with the cleaning pump station. A solution of a certain concentration is added, which circulates within the ash water pipes for cleaning. As the acid washing reduces to a certain extent, the acid 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 when the system is shut down, and it is complex with higher costs.

Preliminary Cleaning

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

Continuous cleaning without shutdown

The process involves continuously injecting a certain amount of acidic fluid while operating under normal ash输送 conditions, simultaneously introducing a specified quantity of ash输送 pipe cleaning inhibitor and pipeline descaling agent, and performing open-loop cleaning. The primary role of the cleaning aids is to facilitate the reaction between the acidic fluid and ash deposits within a certain concentration and flow rate, while also enhancing its solubility in water and reducing airlock formation, ensuring the quality of ash pipe cleaning.

The procedure is as follows: Prior to cleaning, estimate the required acid quantity based on the total scale in the pipeline. Then, calculate the acid addition rate and the flow rate of the sludge pipeline by considering the flow rate of the gray water and acidity. During the cleaning process, take samples at the sampling point at the front of the gray pipe every 30 minutes to test the acidity and strictly control it by adjusting the flow rate of acid addition. In the later stages of cleaning, take samples at the end of the gray 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 deemed complete.


2. High-pressure water jet cleaning equipment
High-pressure water jet cleaning offers high efficiency, low costs, non-damaging to workpieces, environmental friendliness, ease of operation, and safety.
The advantages of high-pressure water technology include:

(1) Excellent Cleaning Quality: The high-pressure water jet cleaning method for pipes and the inner holes of heat exchangers can completely remove scale and blockages inside, revealing the metal substrate. The high-pressure water jet, with its immense energy and supersonic speed, is fully capable of destroying tough 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 substrate being cleaned.

(2) Fast Cleaning Speed - Due to the combined actions of jet washing, wedging, shearing, and abrasion, scale can be quickly disintegrated and removed, which is several to ten times faster than traditional chemical methods, sandblasting and shot peening, simple mechanical, and manual cleaning methods.

Components 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 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.

3. Pipe Scale

(1) Classified by chemical composition, they can be categorized 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) Classified by physical properties, there are two types: scale that is firmly adhered to the pot shell and tube walls, and sediment that is loosely textured and easy to detach.
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 impairs heat transfer efficiency, affecting the boiler's performance; it also tends to damage metal materials by localized overheating, potentially leading to pipe burst accidents; it accelerates galvanic corrosion, causing pipeline lime scale corrosion, and hastens the deterioration of the heating surface. Once lime scale forms, it should be promptly removed using mechanical or chemical methods.

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