Clean various heat exchangers, condensers, industrial pipelines, boilers, and steam power plant condensers. GlanChem cooperation is guaranteed.
Jining Green Chemical Technology Co., Ltd. (abbreviated to 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 boiler air preheaters; as well as air conditioning cleaning, heat exchange equipment cleaning, and cleaning of machinery and chemical equipment. We also handle cleaning and descaling of refrigeration and heating equipment.
Jining Green Cleaning Co. has dozens of cleaning machines in various models ranging from 10mpa to 250mpa, and more than a dozen chemical cleaning pump stations. Our main services are provided to power plants, chemical factories, oil mills, food factories, corporate and institutional units, heating equipment, etc. 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 standardize and regulate the cleaning of heat exchange equipment.
Chemical cleaning descaling process:
Recirculating Closed-loop 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 reaches a certain level, the solution is continuously replenished with more acid. For short-distance single ash water pipelines, if conditions permit, a temporary pipeline can be laid to create a recirculation loop for cleaning. This process must be carried out during shutdown, and it is complex and costly.
Open Path Cleaning
No two ash pipes can form a loop during cleaning; only a single ash pipe can 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 liquid mixing tank, and then continuously or intermittently injecting it into the ash pipe. This process requires additional cleaning equipment during shutdown, which increases costs.
Continuous cleaning without shutdown
The process involves continuously injecting a specific amount of acidic solution while simultaneously introducing a certain quantity of slurry pipe operation cleaning inhibitor and pipeline descaling agent, followed by an open circuit cleaning. The primary function 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, reducing the occurrence of gas blockage, and ensuring the quality of the ash pipe cleaning.
The operation method is: First, estimate the required acid amount based on the total scale in the pipeline before cleaning. Then, calculate the acid addition rate and the flow rate of the ash-pipe operation by considering the flow rate of the sludge water and the acidity. During cleaning, collect a sample at the sampling point at the front of the ash pipe every 30 minutes to test the acidity and strictly control it by adjusting the flow rate of the acid addition. In the later stage of cleaning, take a sample 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 deemed complete.
2. High-pressure water 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.
The advantages of high-pressure water technology include:
(1) Excellent Cleaning Quality - High-pressure water jet cleaning of pipe and heat exchanger bores can completely remove scale and blockages inside, revealing the metal surface. With its immense energy and supersonic speed, the high-pressure water jet is fully capable of destroying tough scale and blockages, yet it has no damaging effect on metal.
The high-pressure water's pressure is less than the compressive strength grade of metal, so high-pressure cleaning will not damage the base material being cleaned.
(2) Fast Cleaning Speed: Due to the combined crushing effects of water jet flushing, wedge splitting, shearing, and grinding, scale can be quickly broken and removed, making the cleaning speed several to tens of times faster than traditional chemical methods, sandblasting and shot peening techniques, 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 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, the spray can also reduce the dust concentration in the work area, lowering atmospheric dust levels from 80mg/m³ with other methods to below the national safety standards, thus causing no pollution.
3. Pipe Scale
(1) Categorizing by chemical composition, it includes 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) Categorized by physical properties, there are two types: water 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. The thermal conductivity of lime scale is very low, approximately 2 to 5 times that of ordinary steel. Lime scale on the boiler's heating surface significantly worsens heat transfer efficiency, affecting the boiler's performance; it can easily cause metal materials to burn due to localized overheating, potentially leading to burst pipe accidents; it also accelerates galvanic corrosion, causing pipeline lime scale corrosion, and hastens the damage to the heating surface. Lime scale should be promptly removed using mechanical or chemical methods.
Heat Exchanger and Refrigeration Equipment Cleaning - Choose GreenChem for Reliability
