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 is a professional company specializing in the cleaning of various industrial heat exchange equipment. The company has comprehensive business philosophy and the capability to develop industrial equipment cleaning technologies, undertaking cleaning services for industrial, private enterprises, corporate chemical equipment, power plant equipment, condensers, boilers, and boiler air preheaters; as well as air conditioning and heat exchange equipment cleaning. We also handle cleaning of machinery and chemical equipment, and descaling of refrigeration and heating equipment.
Jining Greentech Cleaning Co. has dozens of cleaning machines with various models 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 of heat exchange equipment.
Chemical cleaning descaling process:
Recirculating Closed Circuit Cleaning
Recirculating cleaning utilizes two existing parallel ash discharge pipelines to form a loop, creating a recirculation system with the cleaning pump station. A solution of a certain acidity concentration is added, which circulates through the ash water pipes for cleaning. As the acid cleaning reaches a certain level, the solution is continuously replenished. 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 while the system is shut down, and it is complex and costly.
Pilot cleaning
No two grey pipes can form a loop during cleaning; only single grey pipe open-loop cleaning is allowed. The method involves connecting one end of the grey pipe to the cleaning device, continuously preparing a specific concentration of cleaning solution in the blending tank, and injecting it into the grey pipe continuously or intermittently. This process requires adding cleaning equipment during shutdown, which increases costs.
Continuous cleaning without shutdown
This process involves continuously injecting a certain amount of acidic solution while running the ash conveying pipe, simultaneously adding a specific quantity of ash conveying pipe operation cleaning inhibitor and pipeline descaling agent for open-loop cleaning. The primary role 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 enhancing its solubility in water, reducing airlock formation, and ensuring the quality of ash pipe cleaning.
The procedure is as follows: Before cleaning, first estimate the required acid amount based on the total scale in the pipeline. Then, calculate the acid addition rate and the flow rate of the descaling agent and pipeline cleaning agent based on the sludge water flow rate and acidity. During cleaning, take a sample at the front end of the sludge 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 a sample at the end of the sludge 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 high efficiency, low costs, non-damaging to workpieces, environmental protection, ease of operation, and safety advantages.
The high-pressure water technology boasts the following advantages.
(1) Excellent Cleaning Quality - High-pressure water jet cleaning of pipes and heat exchanger bores can completely remove scale and blockages inside, revealing the metal substrate. The high-pressure water jet, with its immense energy and supersonic speed, can fully destroy hard 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 base material being cleaned.
(2) Fast Cleaning Speed: Due to the combined effects of water jet washing, splitting, shearing, and grinding, scaling can be quickly broken and removed, which is several to ten times faster than traditional chemical methods, sandblasting and shot peening techniques, simple mechanical, and manual cleaning methods.
Parts cleaned with high-pressure water jetting require no secondary cleaning, whereas chemical cleaning requires rinsing the surface with clear water.
(3) No Environmental Pollution: As high-pressure water jet cleaning uses pure water as the medium, it does not produce 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 generate 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 atomizing the spray, 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. Therefore, it does not cause any pollution.
3. Pipe Scale
(1) Categorized by chemical composition, they can be divided into 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) 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.
Scale primarily forms due to the salts of calcium, magnesium, and other minerals in the boiler feed water being precipitated and adhering to the metal surface upon heating. The thermal conductivity of scale is very low, approximately 2 to 5 times that of ordinary steel. When scale forms 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 local overheating, even leading to pipe bursting accidents; it also accelerates galvanic corrosion, causing pipeline scale corrosion and speeding up the deterioration of the heating surface. Once scale forms, it should be promptly removed using mechanical or chemical methods.
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