Clean various heat exchangers, condensers, industrial pipelines, boilers, and steam power plant equipment condensers. Glan Chemical Co., Ltd. offers guaranteed cooperation.
Jining Green Chemical Technology Co., Ltd. (abbreviated to Jining Green Cleaning Co.) was established in 2010 and specializes in the cleaning of various industrial heat exchange equipment. The company boasts comprehensive business philosophy and the capability to 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; air conditioning cleaning, heat exchange equipment cleaning, and the cleaning of machinery and chemical equipment; as well as the cleaning and scaling removal of refrigeration and heating equipment.
Jining Greentech Cleaning Co. has dozens of cleaning machines ranging from 10MPa to 250MPa and over a dozen chemical cleaning pump stations. Our main services include power plants, chemical factories, oil refineries, food processing plants, corporate entities, heating equipment, etc. The company also offers long-term industrial heat exchanger cleaning and design solutions 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 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 pipeline sections 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. Additionally, 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 during shutdown and is complex, with higher costs.
Pilot 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, continuously preparing a certain concentration of cleaning solution in the mixing tank, and then continuously or intermittently injecting it into the gray pipe. This process requires adding cleaning equipment during shutdown, which increases costs.
Continuous operation cleaning
This process involves continuously injecting a certain amount of acidic solution while operating the ash conveying pipes, simultaneously adding a specific quantity of ash conveying pipe cleaning inhibitor and pipeline descaling agent. The open-circuit cleaning is conducted. The main function of the cleaning aids is to promote the reaction between the acidic solution and ash deposits at a certain concentration and flow rate, while also increasing its solubility in water, reducing the occurrence of gas blockage, and ensuring the quality of ash pipe cleaning.
Operation procedure: Prior to cleaning, estimate the required acid quantity based on the total scale in the pipeline. Then, calculate the acid addition rate and sludge pipe flow rate for the addition of corrosion inhibitors and pipeline descaler. During cleaning, collect a sample at the front of the sludge pipe every 30 minutes to test acidity, and strictly control acidity by adjusting the flow rate of acid addition. In the latter stage of cleaning, collect a sample at the end of the sludge pipe every 15 minutes to test pH. When the pH reaches a certain value 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, non-polluting the environment, easy operation, and safety.
High-pressure water technology boasts the following advantages.
(1) High-quality Cleaning: The high-pressure water jet cleaning for pipes and the inner holes of heat exchangers can thoroughly remove all scale and blockages inside, revealing the metal substrate. The high-pressure water jet, with its immense energy and supersonic movement, is fully capable of destroying tough scale and blockages without causing any damage to the metal.
Due to the pressure of high-pressure water being 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 crushing effects of water jet washing, 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 clear water.
(3) No Environmental Pollution: Since high-pressure water jet cleaning uses pure water as the medium, it does not generate large amounts of dust like sandblasting, grit-blasting, or simple mechanical cleaning, which can pollute the atmosphere and harm health. Nor does it produce 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, the spray 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. Therefore, it does not cause any pollution.
Pipe Scale
(1) Classified by chemical composition, it includes 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: 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 like 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, approximately 2 to 5 times that of ordinary steel. When lime scale accumulates on the boiler's heating surface, it significantly worsens the heat transfer efficiency and affects the boiler's performance; it can easily cause metal materials to burn due to localized overheating, potentially leading to pipe explosion accidents; it also accelerates galvanic corrosion, causing 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 and Refrigeration Equipment Cleaning - Choose GreenChem for Assurance
