Process method for preparing gas phase adsorption material from Chinese patent medicine residues

Abstract

The invention discloses a process method for preparing a gas-phase adsorption material from Chinese patent medicine residues. The main processing process comprises the following steps: (1) drying at low temperature; (2) carrying out medium-temperature dry distillation and carbonization; (3) milling and kneading; (4) molding and granulating; (5) secondary dry distillation and carbonization; (6) steam high-temperature activation; and (7) packaging the whole granules. The adsorption material produced by taking the traditional Chinese medicine residues as the raw materials has the performance indexes of developed specific surface area, high benzene adsorption capacity and low ash content, the specific surface area can reach 1200 m < 2 > / g, CTC is larger than 70%, methylene blue is larger than 200 mg / g, the iodine value is larger than 1100 mg / g, the pore structure is developed, the specific surface area is high, the adsorption capacity is high, and the adsorption material is an excellent adsorption material; the activated carbon can be widely applied to the fields of chemical engineering, food and pharmacy, catalyst carriers, electrode materials and the like, can also be used for adsorption and purification of air pollutants VOCs, and can replace coal-based activated carbon to be applied to the environmental protection industry.

Description

technical field [0001] The invention belongs to the technical field of adsorption and purification material preparation, in particular to a process method for preparing gas-phase adsorption material from Chinese patent medicine dregs, which is mainly used to solve the problem of disposal of solid waste of traditional Chinese medicine dregs and traditional activated carbon production with high energy consumption and high pollution. question. Background technique [0002] Traditional Chinese medicine dregs come from the production of raw materials for the production of proprietary Chinese medicines, the processing and processing of traditional Chinese medicinal materials, and the production of light chemical products containing traditional Chinese medicines, accounting for about 70% of the total medicinal dregs. At present, the annual output of medicinal residues from a pharmaceutical factory in Shandong reaches 80,000 tons per year. [0003] Traditional Chinese medicine dreg...

AI Technical Summary

Problems solved by technology

[0006] 1. In the production process of preparing activated carbon from raw coal, a large amount of fly ash will be produced during the storage, pulverization, molding and carbonization of raw coal. The production environment is harsh, and environmental pollution and occupational disease injuries are the main problems at present.

[0007] 2. The consumption of non-renewable resource coal is huge, and each ton of activated carbon finished product needs to consume 3~5 tons of raw coal

[0008] 3. In the activated carbon molding process, a large amount of coal tar needs to be added, the ratio is 30-40%, the consumption per ton of product is about 0.6-1.2 tons / ton, and the production cost is high, especially now that the price of coal tar has risen sharply from the original 3000 Yuan / ton, rising to 5600 yuan / ton, resulting in high production cost of coal-based activated carbon

However, in the process of carbonization and carbonization, natural gas needs to be used as an external heat source (100m³ of natural gas is consumed for producing one ton of carbonized material, and 200~300m³ of natural gas is required to convert into activated carbon products), which consumes a lot of energy; at the same time, there will be a lot of energy in this process The yellow smoke (mainly composed of aromatic hydrocarbons, nitrogen oxides and sulfur) is produced. The yellow smoke produced is desulfurized, denitrified and dust-removed after being incinerated by the furnace tail incinerator. The total amount of pollutant discharge is relatively high, which virtually increases the environmental protection operation The cost has caused environmental pollution

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