Clean all types of heat exchangers, condensers, industrial pipelines, boilers, and steam power plant economizers. Glan Chemical Co., Ltd. offers guaranteed cooperation.

Jining Grean Chemical Technology Co., Ltd. (简称 Jining Grean Cleaning Co.) was established in 2010 and specializes in the cleaning of 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, and corporate chemical equipment, power plant equipment, condensers, boilers, and economizers. Additionally, we provide air conditioning cleaning, heat exchange equipment cleaning, and mechanical and chemical equipment cleaning services. We also handle cleaning of refrigeration and heating equipment for scale removal.
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Jining Greentech Cleaning Co. has dozens of cleaning machines in various models ranging from 10mpa to 250mpa, and more than a dozen chemical cleaning pump stations. We primarily serve enterprises such as power plants, chemical factories, oil refineries, food factories, institutions, and heating equipment. The company also offers long-term industrial heat exchanger cleaning and solution design services to clients in the industry.

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 descaling process:

Recirculating Closed Circuit 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.
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Open Path Cleaning

No two grey pipes should form a loop during cleaning; only a single grey pipe should be used for open-circuit cleaning. The method involves connecting one end of the grey pipe to the cleaning unit, continuously preparing a certain concentration of cleaning solution in the blending tank, and injecting it into the grey pipe continuously or intermittently. This process requires the addition of cleaning equipment during shutdown, resulting in higher costs.

Continuous operation cleaning

The process involves continuously injecting a specific quantity of acidic solution while simultaneously introducing a certain amount of ash-carrying pipe running cleaning inhibitor and pipeline descaling agent for open-loop cleaning. The primary function of the cleaning aids is to promote the reaction between the acidic solution and ash deposits 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 pipe cleaning.

Operation procedure: Before cleaning, estimate the required acid quantity based on the total scale in the pipeline. Then, calculate the acid addition rate and the flow rate for adding sludge descaler and pipeline cleaner based on the gray water flow and acidity. During cleaning, take a sample at the sampling point at the front of the gray pipe every 30 minutes to test the acidity, and strictly control the acidity by adjusting the acid flow rate. In the later stage of cleaning, take a sample at the end of the gray 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 equipment
High-pressure water jet cleaning offers advantages such as high efficiency, low cost, non-damaging to workpieces, non-polluting the environment, easy operation, and safety.
High-pressure water technology boasts the following advantages.

(1) Excellent Cleaning Quality: The high-pressure water jet cleaning for pipes and heat exchanger bores can thoroughly remove scale and blockages inside, revealing the metal surface. With its immense energy and ultra-sonic speed, the high-pressure water jet is fully capable of destroying tough scale and blockages without causing any damage to 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 substrate being cleaned.

(2) Fast Cleaning Speed: Due to the combined effects of water jet scouring, splitting, shearing, and abrasion, scaling can be quickly broken and removed, making the cleaning process several to tens of times faster than traditional chemical methods, sandblasting and shot peening techniques, simple mechanical, and manual methods.

Components cleaned with high-pressure water jetting do not require secondary cleaning; however, after chemical cleaning, the surface chemicals 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 or simple mechanical cleaning, which can pollute the atmosphere and harm health. It also does not produce a significant amount of waste liquid like some chemical cleaning methods, which can contaminate rivers, soil, and water quality. The water jet, using 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 from 80mg/m³ with other methods to below the national safety standards. Therefore, it does not cause any pollution.

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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; mixed scale is typically a mixture of the above three types of scales.

(2) Categorically divided by physical properties, there are two types: water scale that firmly adheres to the pot shell and tube walls, and sediment that is loose and easily detachable.
Lime scale primarily forms due to the salts of 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 that of ordinary steel. When lime scale forms on the boiler's heat transfer surface, it significantly worsens the heat transfer efficiency and affects the boiler's performance; it can also easily cause metal materials to burn due to localized overheating, even leading to pipe explosion accidents; it accelerates galvanic corrosion, causing pipeline lime scale corrosion and speeding up the damage to the heat transfer surface. Once lime scale forms, it should be promptly removed using mechanical or chemical methods.

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