Needle coke industrial production equipment

Needle coke industrial production equipment

Product introduction

Effect of QI in raw asphalt on the formation of needle coke

In the production of needle coke, the content of QI in raw asphalt is usually required to be less than 0.1%. But in the actual production, due to the difficulties of asphalt pretreatment, it is difficult to control the QI in the raw asphalt stable for a long time below 0.1%, and the general requirement is within 0.3%.

The QI content of raw asphalt is high, so it can be considered that the reaction in the coking tower is heterogeneous nucleus. The characteristic of the reaction is that in the early stage of the reaction, QI in the original asphalt plays the role of "nucleus", which will accelerate the formation rate of the mesophase sphere in the system. Mesophase spheroids formed by heterogeneous reactions do not coalesce easily in the early stage, and few new spheroids are produced. The expected spheroid growth and melting, its thermal deformation ability is poor, under the action of external force is not easy to form needle structure. Hydrogenation Project,Hydrogen Production Eguipment,Heating Furnace Equipment The asphalt with high QI content, that is, the coke formed by heterogeneous reaction, is mostly Mosaic structure, a small amount of fiber structure, coke black, after calcination, its color is not silver gray metallic luster.

The low content of raw asphalt QI can be seen as a reaction in the coking tower for uniform nucleation. The characteristics of the reaction are: in the early stage of any reaction, the formation of mesophase pellets, growth and melting at the same time. The melted structure has strong thermal deformation ability and is easy to overflow under the external force of high temperature oil and gas, forming a needlelike structure. Coke formed in raw asphalt is mostly wide area and streamlined structure. After calcination, its color is silver gray metallic luster.

Product parameter

Name: Needle coke heating furnace

Application: petrochemical industry

Design temperature: ≤800℃

Megawatt: 5-50 MW/unit

Specification：：Cylinder diameter 2-8 meters

The square can be customized in length, width and height

Note:

1. before opening the furnace should be furnace tube, parts, ancillary equipment, process pipelines, instruments and other instruments for a comprehensive inspection, confirm the process is correct, all equipment and parts intact, equipment and pipelines without debris, instruments and instruments flexible and convenient operation, real and accurate data;

2. Steam through the process pipeline and equipment of the furnace system to ensure smooth process flow. When all checks are qualified, the fuel gas line shall be completely replaced with nitrogen and then introduced to the fuel gas line. When fuel gas is introduced, pay attention to the oxygen content of air in the pipe <1%. Before ignition, the content of combustible gas in the fuel gas pipeline is detected, and the ignition operation is carried out after the ignition conditions are met.

3. Use steam stoves in strict accordance with operating rules;

4. Heating, close the steam valve, such as furnace and pressure, must be able to wait for the pressure to zero inch after the pot (box) to take.

Compared with other companies, the advantages of our products are: good thermal insulation effect, high thermal efficiency, good energy saving effect, low smoke exhaust temperature, adjustable dilution ratio, good selectivity, less high boiling substance; Emission standards, small pollution, small footprint.

Product process: blanking, assembly, welding, testing, anti-corrosion, installation, commissioning.