Technology of sodium-based serial composite modified briquette for gasification

Abstract

The invention discloses technology of sodium-based serial composite modified briquette special for gas stoves. The technology is established through optimization and screening based on multiple-batch and long-period industrial tests. Preparation of a two-component binder is the core technology of the invention; the binder comprises a sodium-based organic binder component (NR1) and a sodium-based inorganic binder component (NR2) which are respectively prepared through modification of organic matter and inorganic matter which are widely distributed, rich in reserve, and low in price. Before powder coal shaping, the (NR1) and (NR2) components are mixed with the powder coal according to a certain proportion based on the coal quality conditions; after procedures of kneading, shaping, and consolidation, a gasification briquette product is processed, which has cold-state compressive strength of not less than 600 N / ball, thermal-state compressive strength of not less than 400 N / ball, thermal stability of more than 99%, an ash fusion point ST of more than 1400 DEG C, a bonding index G tending to be zero, and chemical activity of more than 90%. Practice confirms that the special briquette produced by the sodium-based two-component composite binder is far better than Datong lump coal commonly used by people with respect to gasification performance. The popularization and application of the technology of the invention can not only relieve the situation of few product and high price for commercial lump coal, but also increase the value of powder coal processing, greatly reduce fuel cost for briquette users, and the technology of the invention is innovative technology with long development prospects.

Description

Technical field: [0001] The invention belongs to the pulverized coal forming technology in the technical field of clean coal. Background technique: [0002] With the wide application and development of industrial gas and city gas, the contradiction between the supply and demand of lump coal suitable for gasification has become increasingly prominent; coupled with the improvement of the degree of mechanization of coal mining, the amount of pulverized coal whose particle size is less than 13mm is as high as 55%. , so that the fixed-bed gas furnace with a large amount of social ownership is faced with "looking for rice to cook", and at the same time, it is caught in a state of sharply rising lump coal prices. Since the Asia-Pacific Economic Cooperation (ESCAP) held an expert meeting on the theme of "Development and Environmental Benefits of Briquette Coal" in the Philippines in 1989, countries all over the world have vigorously developed coal briquette technology. The so-calle...

AI Technical Summary

Problems solved by technology

For example, the high molecular polymer binder made of butadiene, styrene and PVA abroad, the emulsified coal tar binder introduced by HU patent, and the composite binder made of PVA0.1% and starch and gypsum, its The cold strength of briquette can be increased by 200N~300N / ball, but the hot strength is poor

At present, the country is committed to research and development of cheap composite binders to overcome the shortcomings of a single binder. For example, the gasification briquettes made by the Bengbu Glass Research Institute using tar slag added with gelling agent and curing agent have practical value and have been put into industry. Production; Beijing Institute of Coal Chemical Industry has obtained the invention patent of calcium series MJ 1 , MJ 2 Composite binder briquette technology has been successfully used in Φ1.6m water gas two-stage furnace to produce city gas continuously and stably. Since the binder component is uniformly inorganic, the content of briquette ash powder is increased, resulting in ash The residual carbon value is high; since then, Beijing Institute of Coal Chemicals has developed MJ 3 , MJ 4 Composite binder, but from the measurement results, the thermal strength of briquettes is low, only 200-250N / ball

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