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 in power plants, boilers, and economizers. We also offer air conditioning cleaning, heat exchange equipment cleaning, and accept orders for mechanical and chemical equipment cleaning. In addition, we provide cleaning and descaling services for refrigeration and heating equipment.

Jining Grean Cleaning Co. has dozens of cleaning machines with 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, enterprises and institutions, heating equipment, etc. 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, enabling the cleaning of heat exchange equipment to be standardized and regulated.

Chemical Fertilizer Plant Heat Exchanger Cleaning in Shandong Heze Chengwu

Chemical Cleaning Scale Removal Process

Recirculating Closed-loop Cleaning

Recirculating cleaning utilizes two existing parallel ash removal pipelines to form a loop, creating a circulation 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 solution is continuously replenished with more acid. 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 and continuously preparing a specific concentration of cleaning solution in the dosing tank, which is then continuously or intermittently injected into the gray pipe. This process requires the addition of cleaning equipment during shutdown, resulting in higher costs.

Continuous Operation Cleaning

This process involves continuously injecting a certain amount of acidic solution while running, under the normal operation of the ash pipeline without interruption. Simultaneously, a specific amount of ash-pipe cleaning inhibitor and pipeline descaling agent are injected for operation. The cleaning is done by opening the circuit. The main function 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 increasing its solubility in water, reducing the formation of air blocks, and ensuring the quality of ash-pipe cleaning.

The procedure is as follows: Before cleaning, first 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 sludge pipeline for the addition of cleaning inhibitors and pipeline descaling agents according to the flow rate of the sludge water and the 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 can be deemed complete.


2. High-pressure water 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 method for pipes and heat exchanger bores can thoroughly remove all scale and obstructions inside, revealing the metal substrate. With its immense energy and ultra-sonic speed, the high-pressure water jet is fully capable of breaking down hard scale and obstructions 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) Rapid Cleaning Speed: Due to the combined effects of water jet flushing, wedge splitting, shearing, and abrasive cutting, scaling can be quickly broken and removed, which is several to ten times faster than traditional chemical methods, sandblasting, simple mechanical, and manual cleaning methods.

Parts 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) Non-Pollution: As 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, thus not polluting the air and harming 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, using clean water as the medium, is odorless, tasteless, and non-toxic. After atomization, the喷射 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; mixed scale is usually a mixture of the above three types of scales.

(2) Classified by physical properties, there are two types: scale that firmly adheres to the pot shell and pipe walls, and sludge that is loosely textured and easy to dislodge.
Lime scale primarily forms due to the salts, such as calcium and magnesium, present in the boiler feedwater, which precipitate and adhere to the metal surface upon heating. Lime scale has a very low thermal conductivity, approximately 2 to 5 times that of ordinary steel. When lime scale accumulates on the boiler's heat transfer surface, it severely impairs 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 tube explosion accidents; it also 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 either mechanical or chemical methods.

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