Clean various heat exchangers, condensers, industrial pipelines, boilers, and steam power plant economizers. GlanChem partnership is guaranteed.
Jining Greentech Co., Ltd. (Abbreviated as Jining Greentech Cleaning Co.) was established in 2010 and specializes in industrial heat exchange equipment cleaning. The company boasts comprehensive business philosophy and the ability to develop industrial equipment cleaning technology, handling services for industrial, private enterprise, corporate chemical equipment, power plant equipment, condensers, boilers, and air preheaters, as well as air conditioning and heat exchange equipment cleaning. We also undertake cleaning for mechanical and chemical equipment, and descaling of refrigeration and heating equipment.
Jining Grean Cleaning Co. has dozens of cleaning machines with pressure ratings ranging from 10mpa to 250mpa, as well as 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 solutions to 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 standardize and regulate the cleaning process of heat exchange equipment.
Chemical descaling cleaning process:
Recirculating Closed Loop Cleaning
Recirculating cleaning utilizes two original parallel deslagging pipelines to form a loop, creating a circulation system with the cleaning pump station. It involves adding a certain concentration of acidic solution, allowing it to circulate and clean within the sludge water pipeline. As the acid washing decreases to a certain level, the acidic solution is continuously replenished. For short-distance single sludge 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.
Open Channel Cleaning
No two ash pipes can 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 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 cleaning without shutdown
The process involves continuously injecting a certain amount of acidic solution while the ash pipe is operating normally without interruption, simultaneously adding a certain quantity of ash-pipe-running cleaning inhibitor and pipeline descaling agent for open-circuit cleaning. The primary function of the cleaning aids is to promote the reaction between the acidic solution and ash scale at a certain concentration and flow rate, while also enhancing its solubility in water and reducing the formation of gas blockages, ensuring the quality of ash-pipe cleaning.
The procedure is: Before cleaning, first estimate the required acid amount based on the total scale in the pipeline, then calculate the acid addition rate and ash flow rate according to the gray water flow and acidity. During cleaning, take samples at the front of the ash pipe every 30 minutes to test the acidity, and strictly control the acidity by adjusting the acid flow rate. In the later stages of cleaning, test the pH value at the end of the ash pipe every 15 minutes. 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 is efficient, cost-effective, non-damaging to workpieces, environmentally friendly, easy to operate, and safe.
The advantages of high-pressure water technology are as follows.
(1) Excellent Cleaning Quality - High-pressure water jet cleaning of pipeline and heat exchanger bores can completely remove scale and obstructions from inside the pipes, 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 obstructions, yet it exerts no damaging effects on 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 being cleaned.
(2) Fast Cleaning Speed: Due to the combined effects 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 jet do not require secondary cleaning; however, after chemical cleaning, the surface chemical agents must be rinsed off with clean water.
(3) Environmentally Friendly - Since high-pressure water jet cleaning uses clean water as the medium, it does not produce large amounts of dust like sandblasting, grit blasting, or simple mechanical cleaning, which can pollute the air and harm health. It also does not generate large volumes of waste liquid like some chemical cleaning methods, which can contaminate rivers, soil, and water quality. The water jet cleaning using clean water is odorless, tasteless, and non-toxic. After atomization, it can also reduce the dust concentration in the working area, lowering the atmospheric dust level from 80mg/m³ using other methods to below the national safety standards, thereby causing no pollution.
Pipe Scale
(1) Classified by chemical composition, it includes 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) Classified by physical properties, there are two types: a hard scale that firmly adheres to the pot shell and tube walls, and a loose sediment that is easy to detach.
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, about 2 to 5 times less than 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 Reliability
