Clean various heat exchangers, condensers, industrial pipelines, boilers, and steam power plant condensers - GlanChem Cooperation Ensures Reliability

Jining Greentech Chemical Technology Co., Ltd. (abbreviated to Jining Greentech 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, chemical equipment, power station equipment, condensers in power plants, boilers, and boiler air preheaters; as well as air conditioning and heat exchange equipment cleaning. We also handle cleaning of machinery and chemical equipment, as well as descaling of refrigeration and heating equipment.

Jining Grean 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 achieve standardized and standardized cleaning of heat exchange equipment.

Chemical Cleaning Scale Removal Process

Recirculating Closed Circuit Cleaning

Recirculating cleaning utilizes two original parallel deslagging pipelines to form a loop, creating a circulating system with the cleaning pump station. A certain concentration of acidic solution is added, which circulates within the sludge water pipeline for cleaning. As the acid cleaning 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 recirculating loop for cleaning. This process must be carried out during shutdown, and it is complex and costly.

Pilot cleaning

No two gray pipes should form a loop during cleaning; only single-pipe open circuit cleaning is allowed. The method involves connecting one end of the gray pipe to the cleaning unit and continuously preparing a certain concentration of cleaning solution in the liquid storage tank, then injecting it into the gray pipe continuously or intermittently. This process requires additional cleaning equipment during shutdown, resulting in higher costs.

Continuous cleaning without downtime

The process involves continuously injecting a certain amount of acidic solution while the ash pipe is operating normally without interruption. Simultaneously, a specific quantity of ash pipe operation cleaning inhibitor and pipeline descaling agent is added for open-loop 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 and reducing the formation of air blockages, 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 sludge pipe operation by considering 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 deemed complete.


2. High-pressure water jet cleaning equipment
High-pressure water jet cleaning offers high efficiency, low costs, non-damaging to workpieces, environmental friendliness, ease of operation, and safety.
The high-pressure water technology boasts the following advantages.

(1) Excellent Cleaning Quality - High-pressure water jet cleaning of pipes and the inner holes of heat exchangers can completely remove scale and obstructions inside, revealing the metal surface. The high-pressure water jet, with its immense energy and supersonic speed, is fully capable of destroying hard scale and obstructions 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 action of water jet washing, wedge splitting, shearing, and grinding, scale 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.

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, 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.

Pipe Scale

(1) Classified by chemical composition, they can be categorized into 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: a hard scale that firmly adheres to the pot shell and pipe walls, and a loose sediment that is easy to dislodge.
Scale primarily forms due to the salts like calcium and magnesium in the boiler feed water precipitating and adhering to the metal surface upon heating. The thermal conductivity of scale is very low, around 2 to 5 times that of ordinary steel. Scale on the boiler's heat transfer surface greatly deteriorates heat transfer efficiency, affects the boiler's performance; it can easily cause metal materials to burn due to localized overheating, even leading to pipe explosion accidents; it accelerates galvanic corrosion, causing pipeline scale corrosion, and speeding up the damage to the heat transfer surface. Once scale forms, it should be promptly removed using mechanical or chemical methods.

Heat Exchanger and Refrigeration Equipment Cleaning - Choose GreenChem for Confidence