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, chemical equipment, power plant equipment, condensers, boilers, and economizers. We also handle air conditioning cleaning, heat exchange equipment cleaning, and cleaning of machinery and chemical equipment. In addition, we offer cleaning services for refrigeration and heating equipment to remove scale.

Jining Green 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 are provided to power plants, chemical factories, oil mills, food processing plants, corporate entities, heating equipment, and more. The company also offers long-term industrial heat exchanger cleaning and solution design services 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, which has enabled 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 deslagging pipelines to form a loop, creating a circulation system with the cleaning pump station. It introduces a certain concentration of acidic solution, which circulates within the sludge water pipes for cleaning. As the acid cleaning decreases to a certain level, the solution is continuously replenished. For short-distance single sludge 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.

Breakthrough Cleaning

No two grey pipes should 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 unit and continuously preparing a specific concentration of cleaning solution in the mixing tank, then injecting it into the grey pipe continuously or intermittently. This process requires additional cleaning equipment during shutdown, leading to higher costs.

Continuous cleaning without downtime

This process involves continuously injecting a certain amount of acidic solution while running, without interrupting the normal operation of the ash conveying pipe. Simultaneously, a specific amount of ash conveying pipe cleaning inhibitor and pipeline descaling agent are added. The system is flushed open. The primary function of the cleaning aids is to enhance the reaction between the acidic solution and the ash deposits at a certain concentration and flow rate, while also increasing the 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 pipeline by considering the flow rate of the grey water and acidity. During cleaning, take a sample at the front end of the sludge pipeline every 30 minutes to test the acidity and strictly control it by adjusting the flow rate of acid addition. In the later stage of cleaning, take a sample at the end of the sludge pipeline every 15 minutes to test the pH value. When the pH value reaches a certain level and remains unchanged for 30 minutes, the cleaning process 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 benefits.
Advantages of high-pressure water technology include:

(1) Excellent Cleaning Quality - High-pressure water jet cleaning of pipe and heat exchanger bores effectively removes all scale and blockages from within, revealing the metal substrate. The high-pressure water jet, with its immense energy and supersonic speed, is capable of completely destroying tough 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) Rapid Cleaning Speed: Due to the combined action of water jet erosion, wedge splitting, shearing, and grinding, scaling can be quickly broken and removed, making the cleaning process several to ten times faster than traditional chemical methods, sandblasting and shot peening techniques, simple mechanical methods, and manual labor.

Components cleaned with high-pressure water jetting do not require secondary cleaning; however, after chemical cleaning, the surface must be rinsed with clean water.

(3) Non-Environmental Pollution: Since high-pressure water jet cleaning uses clean 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 significant amount of waste liquid like some chemical cleaning methods, which can contaminate rivers, soil, and water quality. The water jet cleaning with clean water as the medium is odorless, tasteless, and non-toxic. After atomizing the spray, it can also reduce the dust concentration in the working area, lowering atmospheric dust from 80mg/m³ using other methods to below the national safety standards, thus causing no pollution.

3. Pipe Scale

(1) Categorized by chemical composition, they can be divided 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: a solid scale that firmly adheres to the pot shell and pipe walls, and a loose sediment that is easily detached.
Lime scale primarily forms due to the salts like calcium and magnesium in the boiler feed water, which precipitate and adhere to the metal surface upon heating. The thermal conductivity of lime scale is very low, around 2 to 5 times that of ordinary steel. Lime scale deposited on the boiler's heat transfer surface significantly worsens the heat transfer efficiency, affecting the boiler's performance; it can easily lead to metal material damage due to local overheating, even causing pipe burst accidents; it also accelerates galvanic corrosion, leading to pipe lime scale corrosion and speeding up the deterioration of the heat transfer surface. Once lime scale forms, it should be promptly removed using either mechanical or chemical methods.

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