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

Jining GreenChem Technology Co., Ltd. (简称 Jining GreenChem Cleaning Co.) was established in 2010 and specializes in industrial heat exchange equipment cleaning. 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. We also provide air conditioning cleaning, heat exchange equipment cleaning, and accept orders for mechanical and chemical equipment cleaning. Additionally, we handle cleaning and descaling of refrigeration and heating equipment.

Jining Green Cleaning Company has dozens of cleaning machines in various models ranging from 10MPa to 250MPa, and more than a dozen chemical cleaning pump stations. Mainly serving enterprises include power plants, chemical factories, oil refineries, food processing plants, institutions, heating equipment, etc. The company also provides long-term industrial heat exchanger cleaning and solution design services 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 achieve standardized and standardized cleaning of heat exchange equipment.

Chemical Cleaning Scale Removal Process

Recirculating closed-loop cleaning

Recirculating cleaning utilizes two original 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.

Open road cleaning

No two gray pipes can form a loop during cleaning; only a single gray pipe can be used for open-loop cleaning. The method involves connecting one end of the gray pipe to the cleaning unit, continuously preparing a specific concentration of cleaning solution in the mixing tank, and then injecting it into the gray 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 specific amount of acidic solution while operating, without interrupting the normal conveying of fly ash. Simultaneously, a certain amount of ash conveying pipe cleaning inhibitor and pipeline descaling agent is added. This is an open-circuit cleaning. The primary role of the cleaning additive is to facilitate the reaction between the acidic solution and the ash scale at a certain concentration and flow rate, while also enhancing its solubility in water and reducing the formation of air blockages, ensuring the quality of the 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 for the ash removal agent and pipeline cleaning stripper based on the sludge water flow rate and acidity. During cleaning, take samples at the front sampling point of the ash 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 samples at the end of the ash 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.


2. High-pressure water jet cleaning machinery
High-pressure water jet cleaning offers advantages such as high efficiency, low cost, non-damaging to workpieces, environmental friendliness, ease of operation, and safety.
Advantages of high-pressure water technology include:

(1) Excellent Cleaning Quality: The high-pressure water jet cleaning of pipes and the internal holes of heat exchangers can completely remove scale and blockages inside, revealing the metal substrate. With immense energy and moving at supersonic speeds, the high-pressure water jet is fully capable of destroying hard scale and blockages without causing any damage to the metal.

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

(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.

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 include carbonate scale, sulfate scale, silicate scale, and mixed scale, among others. The primary components of carbonate scale are calcium carbonate and magnesium carbonate; for sulfate and silicate scales, the main components 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 tube walls, and sediment that is loosely textured and easily detached.
Lime scale primarily forms due to the salts, such as 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, approximately 2 to 5 times less than that of ordinary steel. When lime scale accumulates on the boiler's heating surface, it significantly worsens heat transfer efficiency and affects the boiler's performance; it can also lead to the deterioration of metal materials due to localized overheating, potentially causing tube failures. It also accelerates galvanic corrosion, leading to 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 & Refrigeration Equipment Cleaning - Choose Green Chemical for Confidence