Classification and Application of Coconut Shell Activated Carbon

It is mainly used for Purification, Decolorization, Dechlorination and Deodorization of Drinking Water, Pure Water, Wine, Beverages and Industrial Sewage; it can also be used for Desulfurization in the Refining industry. The modified activated carbon has a good removal effect on harmful substances and odors such as benzene (diphenyl, triphenyl), formaldehyde, phenol, hydrazine, ammonia, TVOC, etc., and the adsorption efficiency and adsorption amount of Coconut Shell Activated Carbon are required. It is superior to other types of activated carbon and is safe, non-polluting and has no side effects.

Coconut Shell Activated Carbon packaging instructions: 25 kg / bag, with an intimal sealed bag can also be customized.

The Adsorption capacity of Activated Carbon has a certain relationship with the level of water temperature and the quality of water. The higher the water temperature, the stronger the Adsorption capacity of activated carbon; if the water temperature is above 30 °C, the adsorption capacity reaches the limit and there is a possibility of gradual decrease. When the water quality is acidic, the adsorption capacity of activated carbon for anionic substances is relatively weakened; when the water quality is alkaline, the adsorption capacity of activated carbon for cationic substances is weakened. Therefore, the pH of the water is unstable, which will also affect the adsorption capacity of activated carbon. Zhengzhou Coconut Shell activated carbon deodorization effect Coconut Shell Active Coconut Shell Activated Carbon is much higher than coal-based activated carbon, and the finished activated carbon material is generally not easily recognized by the general public. In the market, unscrupulous sellers often use the weakness of consumers' unrecognizable materials and sell them with coal-based activated carbon fake coconut shell activated carbon, which is more serious in civil or industrial fields.

Here are a few ways to easily distinguish between them:

1. Coconut Shell Activated Carbon belongs to the category of shell-shell activated carbon. Its main features are low density and light hand feeling. The weight in the hand is obviously lighter than that of coal-based activated carbon. The same weight of activated carbon, coconut shell activated carbon volume is generally larger than coal-based activated carbon.

2, coconut shell activated carbon shape is generally broken granular, flake, and molded Activated Carbon, such as columnar, spherical activated carbon, mostly coal charcoal.

3. Due to the low density of coconut shell activated carbon and light hand feeling, the activated carbon can be put into the water. The coal charcoal generally sinks faster, while the coconut shell activated carbon floats in the water for a longer period of time. If you add more weight, you will gradually sink into the bottom of the water. When the activated carbon is completely bottomed, you will see that each activated carbon is wrapped with a small bubble on the outside, which is crystal clear and very interesting.

4, coconut shell activated carbon is a small molecular pore structure, the activated carbon is placed in the water, the air discharged when the water molecules are adsorbed will produce many very small blisters (the naked eye can just see), densely floating to the surface. The coal-based activated carbon is generally a macromolecular pore structure, and the bubble phase produced is also large.

Under the engineering conditions of temperature 40, pressure 0.02Mpa, gas flow rate of 0.05cm / s, and relative humidity of 25%, the adsorption coefficients of activated carbon to inert gas are 400mL / g and 28.8mL / g. In the range of ~40, the adsorption coefficient of ruthenium on activated carbon decreased by about 2% for each increase of temperature; the adsorption coefficient of activated carbon for inert gas is also affected by the different degrees of humidity and pressure. The adsorption coefficient measured according to the experiment can be calculated. Under the engineering conditions used in the test, if the Purification coefficient is required to reach 2500 (requires 60 decay), the volume of the residence bed with activated carbon is only 6.5143, which is about 95% smaller than the volume of the compression tank (the storage pressure of the compression storage decay tank is At 1.0, the compression tank volume needs to be 1303.

The radioactive inert gas released from the core during the operation of the reactor was reduced to a dischargeable level by using a compression tank storage decay method in the early stage. In recent years, this method has gradually been replaced by a safer, more economical and feasible activated carbon bed adsorption decay method. Nuclear power plants in Germany, Sweden, Finland, the United States, South Korea and other countries have used the detention technology, Qinshan Phase III and Lianyungang Nuclear Power Plant in China. This technology is also used. In engineering applications, the activated carbon retention bed is filled with activated carbon in a specific container. When the gas to be treated passes through the activated carbon container, the inert gas in the gas stream is adsorbed by the activated carbon to separate from the carrier gas stream, but this The adsorption is physical adsorption, and thus the desorbed inert gas is again adsorbed and desorbed again during the forward movement as the carrier gas flow moves. Therefore, the gas flow may undergo multiple adsorptions during the passage through the activated carbon layer.

During the desorption process, the inert gas will lag through the activated carbon bed for a period of time after the carrier gas flow. In this trapped process, the short-lived radioisotopes of the ruthenium and osmium adsorbed and retained are continuously decayed, and the activated carbon residence bed is activated by radioactivity. The gas is adsorbed and retained, and the short-lived nuclide decays to a dischargeable level during the residence time. In the radioactive inert gas released from the core, the half-life of the radioactive isotope of thorium is shorter, and the half-life is 53. (The longest half-life of the nuclides, so the adsorption performance of activated carbon is very concerned.

Since the elements (and the adsorption on activated carbon are both physically adsorbed, the adsorption performance of the two on the same activated carbon has a good correlation - that is, the adsorption performance of the adsorbed activated carbon pair is good, and the same kind of activated carbon The ratio of adsorption coefficient is generally between 1020, so this study used (the tracer studied the effects of various process parameters on the adsorption of activated carbon, and tested the adsorption retention of the activated carbon under design conditions. The performance is convenient for design calculation. The experimental results are finally expressed as the adsorption coefficient of stable isotope for lanthanum and cerium. The commonly used activated carbon types are coal charcoal, Coconut Shell Charcoal and other shell charcoal. Comprehensive comparison of mechanical strength and adsorption performance The performance of coconut shell activated carbon adsorption radioactive inert gas under engineering conditions is generally considered to be relatively stable, but with the different origins of raw materials and processing technology, the adsorption capacity of coconut shell activated carbon for inert gas is often different, and its adsorption performance. It is also affected by factors such as carbon bed temperature, pressure, gas flow rate, and airflow relative humidity.

In this paper, for a representative engineering design condition (temperature 40 ° C, gas flow rate ratio 0.05 /, carbon bed pressure 0.02 gauge pressure, air flow relative humidity 25%), based on previous research work, a coconut shell produced by a factory The performance of activated carbon adsorption inert gas was studied.

The device mainly comprises the following parts: a carrier gas supply part, a gas flow relative humidity control part, a radioactive tracer gas supply part, an activated carbon test bed and a guard bed, a parameter control and a radioactivity measurement part. In order to ensure the normal operation of the ionization chamber, when the relative humidity impact test is carried out, a first-stage ice water cooling water remover, an activated carbon bed separation protection bed and a test bed are added between the hygrometer and the radioactivity measuring instrument, and the filling bed is filled in the protection bed. The activated carbon was dried to remove moisture from the nitrogen. Except for the relative humidity impact test, the carrier gas was passed through the guard bed before entering the test bed during other tests. The test bed is filled with dried or compressed humidity coconut shell activated carbon, radioactive inert gas injection part: the gas containing (or gas is stored in a cylinder, and a certain amount of radioactive gas is injected into the test bed by pulse method during the test.