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. (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 technologies. We undertake cleaning services for industrial, private enterprise, and corporate chemical equipment, power station equipment, condensers at power plants, boilers, and economizers. We also handle air conditioning and heat exchange equipment cleaning, as well as the cleaning of mechanical and chemical equipment. We also provide cleaning services for refrigeration and heating equipment, including scale removal.

Jining Grean Cleaning Co. has dozens of cleaning machines in 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 standardize and normalize the cleaning process for heat exchange equipment.

Chemical Cleaning Scale Removal Process

Recirculating Closed Loop Cleaning

Recirculating cleaning utilizes two existing parallel deslagging pipelines to form a loop, which, together with the cleaning pump station, creates a recirculation system. A certain concentration of acidic solution is added, and the slurry flows through the pipeline in a recirculating manner for cleaning. As the acid washing reaches a certain level, the acidic solution is continuously replenished. For short-distance single slurry 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 Channel Cleaning

No two grey pipes can form a loop during cleaning; only a single grey pipe can be used for open circuit cleaning. The method involves connecting one end of the grey pipe to the cleaning unit, continuously preparing a specific concentration of cleaning solution in the fluid tank, and then injecting it into the grey pipe continuously or intermittently. This process requires the addition of cleaning equipment during shutdown, which increases the cost.

Continuous cleaning without shutdown

The process involves continuously injecting a certain amount of acidic solution into the ash pipe while the normal ash transportation is not interrupted, simultaneously introducing a specific quantity of ash-pipe operating cleaning inhibitor and pipeline descaling agent. This is an open-circuit cleaning. The primary function of the cleaning aids is to facilitate the reaction between the acidic solution and ash deposits at a certain concentration and flow rate, while also increasing its solubility in water, reducing air blockages, and ensuring the quality of ash pipe cleaning.

The procedure is as follows: First, estimate the required acid quantity based on the total scale in the pipeline before cleaning. Then, calculate the acid addition rate and the flow rate of the descaling agent and pipeline cleaner by considering the sludge water flow 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. The cleaning is considered complete when the pH value reaches a certain level and remains unchanged for 30 minutes.


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 friendliness, ease of operation, and safety.
High-pressure water technology boasts the following advantages.

(1) Excellent Cleaning Quality - The high-pressure water jet cleaning of pipeline and heat exchanger bores can completely remove scale and blockages inside, revealing the metal substrate. With immense energy and moving at supersonic speeds, 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) Rapid Cleaning Speed: Due to the combined crushing effects of water jet flushing, wedge splitting, shearing, and abrasion, scaling 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 chemicals 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 large amounts of dust like sandblasting or simple mechanical cleaning, which can pollute the atmosphere and harm health. It also does not produce large volumes 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 atomizing the spray, it can also reduce the dust concentration in the work area, lowering atmospheric dust from 80mg/m³ using other methods to below the national safety standards. Therefore, it does not cause any pollution.

Pipe Scale

(1) Classified by chemical composition, they 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) Categorized by physical properties, there are two types: hard scale that firmly adheres to the pot shell and tube walls, and soft sediment that is loose and easily removable.
Scale is primarily formed due to the salts of calcium, magnesium, and other minerals in the boiler feed water that 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 deposited on the boiler's heating surface greatly deteriorates heat transfer efficiency and affects the boiler's performance; it can easily cause metal materials to burn due to local overheating, even leading to tube bursting accidents; it also accelerates galvanic corrosion, causing pipeline scale corrosion and speeding up the damage to the heating surface. Once scale forms, it should be removed promptly using either mechanical or chemical methods.

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