Clean various heat exchangers, condensers, industrial pipelines, boilers, and steam power plant condensers. Glan Chemical Co., Ltd. guarantees cooperation.

Jining Green Chemical Technology Co., Ltd. (简称 Jining Green Cleaning Co.) was established in 2010 and specializes in the cleaning of various industrial heat exchange equipment. The company has comprehensive business philosophy and the capability to develop industrial equipment cleaning technologies. We undertake cleaning services for industrial, private enterprise, and corporate chemical equipment, power plant equipment, condensers, boilers, and economizers. We also handle air conditioning and heat exchange equipment cleaning, as well as cleaning of machinery and chemical equipment. Additionally, we provide cleaning services for refrigeration and heating equipment to remove scale.

Jining Grean Cleaning Company stocks dozens of cleaning machines with various models ranging from 10mpa to 250mpa, and over a dozen chemical cleaning pump stations. Our primary services include power plants, chemical factories, oil mills, food factories, corporate entities, heating equipment, etc. The company also provides long-term industrial heat exchanger cleaning and design solutions to industry clients.

Our company has recently acquired domestic cleaning machines and imported cleaning equipment. We have hired experienced technical specialists in the cleaning industry, enabling the cleaning of heat exchange equipment to be standardized and standardized.

Chemical Cleaning Scale Removal Process

Recirculating Closed Loop Cleaning

Recirculating cleaning utilizes two original parallel ash pipeline lines to form a loop, creating a circulation system with the cleaning pump station. A certain concentration of acidic solution is added, which circulates within the ash water pipeline for cleaning. As the acid washing reduces to 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 offline, and it is complex and costly.

Open Channel Cleaning

No two ash pipes should form a loop during cleaning; only a single ash pipe should be used for open-loop cleaning. The method involves connecting one end of the ash pipe to the cleaning unit, continuously preparing a specific concentration of cleaning solution in the liquid storage tank, and then continuously or intermittently injecting it into the ash pipe. This process requires additional 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 and not shut down. Simultaneously, a specific quantity of ash pipeline operation cleaning inhibitor and pipeline descaling agent is added for open-loop cleaning. The primary function of the cleaning additive 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 occurrence of air blockages, 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 for the washing and corrosion inhibitor addition in the conveying pipe according to the sludge water flow rate and acidity. During the cleaning process, collect and test the acidity at the sampling point at the front of the sludge pipe every 30 minutes, and strictly control the acidity by adjusting the acid flow rate. In the later stage of cleaning, test the pH value at the end of the sludge 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 offers advantages such as high efficiency, low cost, non-damaging to workpieces, environmental friendliness, ease of operation, and safety.
The high-pressure water technology offers the following advantages.

(1) Excellent Cleaning Quality: The high-pressure water jet cleaning method for pipes and heat exchanger bores effectively removes all scale and blockages inside, revealing the metal substrate. With its immense energy and supersonic speed, the high-pressure water jet is fully capable of destroying 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 crushing effects of water jet washing, wedging, shearing, and grinding, scale can be quickly broken and removed, making the cleaning speed several to ten times faster than traditional chemical methods, sandblasting and shot peening techniques, 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 clear water.

(3) No Environmental Pollution - Since 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 using pure water 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. Therefore, it does not cause any pollution.

Pipe Scale

(1) Classified by chemical composition, they include 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: scale that is firmly adhered to the pot shell and pipe walls, and sediment that is loosely textured and easily detached.
Lime 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. Lime scale has a very low thermal conductivity, approximately 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 Confidence