Recycled coconut shell activated carbon use precautions What should I pay attention to after the regeneration of coconut shell activated carbon? It is not that the activated carbon is omnipotent after regeneration. There is no need to pay attention to it. This is not the case, then let me introduce it to you: Coconut shell activated carbon has been widely used in environmental protection. The adsorption of coconut shell activated carbon is a physical process. The high temperature steam is used to remove the internal impurities, which restores the original activity and has obvious economic benefits. In the industry, it is widely used in the field of wastewater tertiary treatment. If the activated carbon after adsorption cannot be recovered, the treatment cost per ton of wastewater will increase by 0.83 to 0.90 yuan, and it will cause secondary pollution to the environment. The secondary treated wastewater first enters the mixing tank and then enters the flocculation tank. Under the action of ferric chloride, calcium hydroxide and polymer flocculant, the suspended impurity particles in the wastewater are precipitated, and the upper layer of clarified water is pumped. After being sent to the sand filter for filtration, it is pumped into the activated carbon adsorption tower. As the adsorption process progresses, the adsorption capacity of activated carbon will gradually decrease, so it is necessary to periodically remove the activated carbon from the suction. The bottom of the tower is placed in a failed carbon tank. The spent activated carbon is pickled with dilute sulfuric acid in the pickling tower and then sent to a dehydrator for dehydration to 40%-50%. The dehydrated spent carbon enters the hopper and the feeding vessel. The fluidized bed regeneration furnace is regenerated. The activated carbon is sequentially introduced into the regenerated activated carbon receiving tank and the regenerated activated carbon storage tank. The regenerated activated carbon is sent from the regenerated charcoal storage tank to the top of the adsorption tower to supplement the activated carbon for adsorption and then treated with water. During regeneration, the cod component and other impurities adsorbed on the failure become gas, which is purified by a deodorizing furnace and a wet gas scrubber and then discharged by the chimney. The coconut shell activated carbon dephenolization method is suitable for treating small amounts of phenol-containing wastewater. The characteristics of activated carbon dephenolization method: simple equipment, easy operation, and the phenol removal rate is 85-90. However, the regeneration process is complicated, the pretreatment requirements are high, and the adsorbent cost is high. Overview of the role of powdered activated carbon The wood powdered activated carbon produced by the phosphoric acid method has a developed mesoporous structure and a developed specific surface area, and has large adsorption capacity, high filtration speed, and no zinc salt. It is widely used in the food industry for the decolorization, refining and deodorization of sugar, glutamic acid and salt, lactic acid and salt, citric acid and salt, seasonings, animal and plant protein, biochemical products, pharmaceutical intermediates, vitamins, antibiotics, etc. And go to the miscellaneous. Activated carbon is a specially treated charcoal with numerous fine pores and a large surface area with a surface area of ​​500-1500 square meters per gram of activated carbon. Activated carbon has a strong physical adsorption and chemical adsorption function, but also has a detoxification effect. Detoxification is the use of its huge area, the poison is adsorbed on the activated carbon in the air, thus preventing the absorption of poisons. At the same time, activated carbon can combine with a variety of chemicals to prevent the absorption of these substances. (1) Classification of activated carbon There are many types of activated carbon used in production. Generally made into powder or granules. Powdered activated carbon has strong adsorption capacity, is easy to prepare, and has a low price, but it is difficult to regenerate and generally cannot be reused. Granular activated carbon is more expensive to be delivered, but it can be used repeatedly after regeneration, and it has better working conditions and convenient operation and management. Therefore, granular activated carbon is often used in water treatment. (2) Activated carbon adsorption activated carbon adsorption refers to the adsorption of one or more substances in water by the solid surface of activated carbon to achieve the purpose of purifying water quality. (3) Factors affecting the adsorption of activated carbon The adsorption capacity and adsorption rate are the main indicators for measuring the adsorption process. The amount of adsorption capacity is measured by the amount of adsorption. The adsorption speed refers to the mass-free adsorption of the unit weight adsorbent per unit time. In water treatment, the adsorption rate determines the contact time between the wastewater and the adsorbent. The adsorption capacity of apricot activated carbon is related to the pore size and structure of activated carbon. In general, the smaller the particles, the faster the pore diffusion rate, and the stronger the adsorption capacity of activated carbon. The pH and temperature of the sewage also have an effect on the adsorption of activated carbon. Decomposition of various indexes of shell activated carbon The strong adsorption capacity of activated carbon mainly depends on the iodine value, butane to, ash, and bulk weight. The following is an indication of the effect of various values ​​of activated carbon on the adsorption force of activated carbon: Iodine value The iodine value refers to the amount of iodine adsorbed by activated carbon in a 0.02 N 12/KL aqueous solution. The iodine value is associated with a pore surface area greater than 10 A in diameter. The high iodine value of activated carbon is one of the criteria for judging. 2. Butane value The butane value is the adsorption of butane by the activated carbon per unit weight of saturated air and butane at a specific temperature and under a specific pressure through the carbon bed. 3. Ash There are two kinds of gray powder of activated carbon: surface gray powder, and the other is internal gray powder. Generally speaking, the gray powder of activated carbon refers to the internal gray powder. 4. Moisture Moisture is a measure of how much water is contained in the carbon, that is, the weight of the adsorbed water in the activated carbon. 5. Hardness The hardness value refers to the resistance of the granular activated carbon to the decaying motion of the steel ball in the RO-TAP instrument. Hardness is an indicator of the mechanical strength of activated carbon. Carbon tetrachloride The carbon tetrachloride value is an indicator of the total pore volume measured by a saturated zero Celsius CCI4 gas stream passing through a 25 degree carbon bed. 6. Sugar value The molasses value is a measure of the relative decolorization ability of activated carbon in a boiling molasses solution. The molasses value is interpreted as a surface with a hole diameter greater than 28A product. Because molasses is a multi-component mixture, this parameter must be tested in strict accordance with the instructions. The molasses value is the activated carbon standard and the activity to be tested. The sample of charcoal is treated with a molasses solution obtained by calculating the ratio of the optical density of the filtrate. 7. Stacking weight Stacking weight is a method of measuring the mass of a specific amount of carbon. By gradually adding activated carbon to a graduated drum to 100 cc and measuring its mass. This value is used to calculate the amount of activated carbon required to fill a particular adsorption unit. Simply put, the bulk weight is the weight per unit volume of activated carbon. 8. Particle density The particle density is the weight of the granular carbon per unit volume, excluding the particles and the space between the cracks greater than 0.1 mm. 9. Methylene blue The methylene blue value refers to the number of milligrams of methylene blue absorbed when 1.0 g of carbon and 1.0 m/L of methylene blue solution reach equilibrium. 10. Wear value The wear value is an indicator for measuring the wear resistance of activated carbon. The wear value of the granular activated carbon indicates that the particles reduce the resistance of the particles during the treatment. Knife Cutter,Best Box Cutter,Retractable Utility Knife,Paper Cutting Knife YUCHENG RUNJIA MEASURING TOOLS CO.,LTD , https://www.duobangtools.com