Hubei Sanli Fengxiang Technology Blog

As a  Hydrogen Peroxide Production Plant , let's share with you the selection considerations for chemical pumps. 1 . Pump shape Determine the pump form According to the specific working conditions and the characteristics of the pump shape, determine the pump form, such as: no leakage required, select the magnetic pump, the working conditions required to be sucked, selected from the suction pump, the wear-resistant working condition, the slurry pump, etc. Wait, meet more specific working conditions can be determined after communication with the manufacturer. 2. Material Determine material According to different media, choose the corresponding material. For details, please refer to the Corrosion Data Manual. Selection principle: The same suitable material is relatively cheap, and the same cheaper life is longer. Comprehensive consideration of cost performance. 3. Specifications Determine specifications After determining the pump shape and material, basically a ce...

In the process of formaldehyde production, sometimes the temperature phenomenon occurs.  Formaldehyde Production Plant  makes the following analysis according to the practical experience in the production process: 01 The steam drum pressure suddenly drops, the batch steam is reduced, sometimes the water is added too fast, the steam drum is full of water, and some instruments fail. Slowly add water, increase the steam pressure, properly increase the batch steam, check whether the meter is normal; 02 The evaporator liquid level is too low, the evaporation amount is too small, and it is easy to cause over-temperature. The methanol feed amount should be appropriately increased to make up the normal liquid level; 03 If the meter fails, the air flow suddenly increases, and it is also very easy to overheat. The air volume should be reduced immediately, the instrument should be repaired, and normal production should be resumed. 04 Sometimes when people do not op...

As a  Hydrogen Peroxide Manufacturing Plant , let's talk about the dilute formaldehyde concentration recovery technology. In the production process of paraformaldehyde and polyoxymethylene, high concentrations of formaldehyde are required as raw materials. However, normal formaldehyde production does not exceed 55%. It is necessary to dehydrate and concentrate the raw material formaldehyde, and dilute formaldehyde is generated during the concentration process. Dilute formaldehyde is usually used to produce downstream products (such as urotropine, methylal, etc.) that are not required for the concentration of formaldehyde raw materials, and to concentrate and recycle. There are two kinds of commonly used dilute formaldehyde concentration and recovery technologies, namely, a vacuum flash separation process and a pressurized distillation concentration process. The former will produce about 8% dilute formaldehyde in the concentration process; the latter can recover about 36-...

As a  UF Technology Supplier , let's share with you the delayed condensation method for phenolic wastewater treatment. First, delay condensation method The phenolic resin industry wastewater must reach the third-level discharge or the first-level discharge, and must pass the biochemical system to meet the requirements. In order to ensure the stable operation of the biochemical system, the wastewater before entering the biochemical system needs to be pretreated by physicochemical treatment. The delayed condensation method for wastewater with small water volume (20 tons of wastewater/day or less) is an effective pretreatment method. Delayed condensation mainly refers to adjusting the proportion of phenolic according to the proportion of phenolic in the wastewater and the type of phenol. Under the condition of sulfuric acid or oxalic acid catalysis, the phenolic is condensed in two steps at a certain temperature, and the wastewater is condensed. The phenol content is controlled b...

Evaporative cooling is a newly developed refrigeration energy-saving technology; it uses water evaporation and high-temperature and high-pressure superheated steam to condense into a liquid, thereby achieving the purpose of refrigeration. It is widely used in many industries such as petrochemical, light industry and pharmacy, refrigeration and air conditioning, food refrigeration. It is gradually being applied in the formaldehyde industry. As a  Heavy Aromatic Distillation Plant , let's explain it to everyone. 01. Structure The evaporative cold structure is a cooling device that combines a shower tube cooler and a circulation cooling tower. The cooler adopts a counterflow structure, which mainly includes a air cylinder, an axial flow fan, a water collector, a water distributor, a cooling heat exchange tube group, a circulating water pump, a float ball valve and the like. The cooling tubes are used in parallel, the heat exchange area is large, the system resistance is small, th...

As a  Hydrogen Peroxide Industrial Plant , let's talk about the factors that affect evaporation. Evaporator structure The structure and state of the evaporator determine the efficiency of evaporation. The heating coefficient α on the side of the heated steam condensation is relatively large, while the heat transfer coefficient α on the methanol side is relatively small. In the structural design, the heat supply coefficient on the methanol side should be strengthened to achieve better heat transfer efficiency. Therefore, at the time of design, the circulation speed of the raw material methanol is high, so as to improve heat transfer and enhance evaporation. 2. Evaporation temperature It is common knowledge that liquids are vaporized by heat and evaporation. It is affirmative to increase the temperature to facilitate the evaporation of methanol. However, when the liquid temperature is lower than the boiling temperature in the operation, the liquid vaporization can only be ca...

Whenever you mention formaldehyde in your life, everyone is a look of panic. It is thought that the newly renovated rooms and offices are filled with the smell of formaldehyde. If you stay in a formaldehyde-containing environment for a long time, you will be at risk of death. As a  Formaldehyde Production Plant , we are going to talk about the use of formaldehyde as a basic chemical raw material today, hoping to change your understanding. Formaldehyde is a popular chemical product that is widely used, has a simple production process, and has sufficient raw material supply. It is the backbone of methanol downstream products. The world's annual output is about 25 million tons, and about 30% of methanol is used to produce formaldehyde. However, formaldehyde is a low-concentration aqueous solution. It is not convenient for long-distance transportation from an economic point of view. Therefore, it is generally located near the main consumer market, and import and export trade is also...