Clean various heat exchangers, condensers, industrial pipelines, boilers, and steam power plant condensers. Greenclean Chemicals offers reliable 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 possesses comprehensive business philosophy and the capability to develop industrial equipment cleaning technology. We undertake cleaning services for industrial equipment, corporate chemical equipment, power plant equipment, condensers in power plants, boilers, and economizers, as well as air conditioning systems and heat exchange equipment. We also handle cleaning of machinery and chemical equipment, as well as descaling of refrigeration and heating equipment.

Jining Grean Cleaning Company stocks dozens of cleaning machines with 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-loop cleaning

Recirculating cleaning utilizes two existing parallel ash piping lines to form a loop, creating a recirculation system with the cleaning pump station. A certain concentration of acidic solution is added, which circulates through the ash water pipes for cleaning. 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 while the system is shut down, and it is complex and costly.

Open road cleaning

No two gray pipes can form a loop during cleaning; only a single gray pipe can 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 injecting it into the gray pipe continuously or intermittently. This process requires the addition of cleaning equipment during shutdown, which increases costs.

Continuous Operation Cleaning

The process involves continuously injecting a certain amount of acidic solution while the ash pipeline is operating normally without interruption, simultaneously adding a specific quantity of ash pipeline operation cleaning inhibitor and pipeline descaling agent. This is an open-loop cleaning process. The primary role of the cleaning aid 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 the formation of air blockages, and ensuring the quality of ash pipeline cleaning.

The procedure is as follows: Prior to cleaning, estimate the required acid quantity 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 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 machinery
High-pressure water jet cleaning offers advantages such as high efficiency, low cost, non-damaging to workpieces, environmental protection, ease of operation, and safety.
The advantages of high-pressure water technology are as follows.

(1) High-quality Cleaning: During the high-pressure water jet cleaning of pipeline and heat exchanger bores, all scaling and obstructions inside the pipes can be thoroughly removed, revealing the metal substrate. The high-pressure water jet, with its immense energy and ultra-sonic movement, is fully capable of destroying tough scaling and obstructions without causing any damage to the metal.

Since the pressure of high-pressure water is less than the pressure-bearing grade of metal, high-pressure cleaning will not damage the base material being cleaned.

(2) Rapid Cleaning Speed: Due to the combined abrasive actions of water jet flushing, wedging, shearing, and grinding, scaling can be quickly broken and removed, making the cleaning speed several to tens of times faster than traditional chemical methods, sandblasting and shot peening, 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 clean 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 emitted jet 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) Classified by chemical composition, it can be categorized into 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) Classified by physical properties, there are two types: scale that firmly adheres to the pot shell and tube wall, and sediment that is loosely textured and easy to detach.
Scale is primarily formed by the salts containing calcium, magnesium, etc., in the boiler feed water, which precipitate and adhere to the metal surface upon heating. The thermal conductivity of scale is very low, approximately 2 to 5 times that of ordinary steel. Scale accumulated on the boiler's heating surface can severely degrade heat transfer efficiency, affecting the boiler's performance; it can also cause metal materials to burn out due to local overheating, even leading to pipe explosion accidents; it can accelerate 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.

Heat Exchanger & Refrigeration Equipment Cleaning - Choose Greentech Chemicals for Reliability