1、 Scope of application

Bag dust removal is widely used in industries such as building materials, metallurgy, chemical, textile, and petrochemical. The bag dust removal system provided by Jingjiang Jinhao can be applied to all industries that use bag dust removal, achieving automated control of bag dust removal.

The bag dust removal system provided by Jingjiang Jinhao Automation Equipment Co., Ltd. is mainly used for bag dust removal and flue gas treatment in ironworks, steelmaking plants, ferroalloy plants, refractory plants, foundries, power plants, etc; Bag filter for dust removal and flue gas filtration in waste incinerators, coal-fired boilers, fluidized bed boilers, etc; Asphalt concrete mixing, building materials, cement ceramics, lime, gypsum and other bag dust removal places; Bag dust removal and flue gas filtration for aluminum electrolysis, lead, tin, zinc, copper and other rare metal smelting; Recycling of fine materials, separation of liquid and solid bags; Liquid solid bag separation and fine material bag recycling in chemical, coke, carbon black, dye, pharmaceutical, plastic and other fields; Dust bag treatment and purification collection for mining, grain processing, flour, electronics industry, wood processing, etc.

2、 System features

The national standard "Classification and Specification Performance Representation Method for Bag Dust Collectors" (GB6719-97) provides clear regulations for the classification of bag dust collectors. According to different dust cleaning methods, it can be divided into five types: mechanical vibration, chamber back blowing, nozzle back blowing, pulse blowing, and mechanical rotary back blowing. Based on the above methods, Jingjiang Jinhao can design the optimal control scheme according to the control object to achieve the best control effect.

Jingjiang Jinhao adopts well-known domestic and foreign brands of PLC control and DCS control according to specific bag dust removal methods and requirements for bag dust removal detection and control points. The high-performance and cost-effective control system operates stably, with good dust cleaning effect and smoke emissions meeting relevant standards.

3、 Main principles

The structure of a bag filter mainly consists of an upper box, a middle box, a lower box (ash hopper), a cleaning system, and an ash discharge mechanism.

The main principles of bag dust removal are: filtration principle and dust cleaning principle.

Filtering principle: Dust containing gas enters through the air inlet, passes through the collision baffle, and most of the coarse particles in the gas are separated by inertia and directly fall into the pipe. After the dust containing gas is shaken by the ash, it enters the filter bag filtering area of the middle box. The gas passes through the filter bag, and the dust is grouped outside the filter bag. The purified gas enters the upper box through the filter bag port and is then discharged through the air outlet.

Dust cleaning principle: As the sleep power time continues, the dust layer on the filter bag continues to accumulate, and the resistance of the dust removal equipment continues to rise. When the equipment resistance rises to the set value or the operating time reaches the set value, the dust cleaning device begins to clean the dust.

4、 System composition and functions

Based on the analysis of the process, Jingjiang Jinhao proposed corresponding control strategies and schemes for the bag dust removal system, and designed the bag dust removal control system according to the control object. This system can serve as a complete dust removal process system, as well as a subsystem in the entire automated production process.

The control system provided by Jingjiang Jinhao achieves automatic control of the filtration system and dust cleaning system during the bag dust removal process.

The system is mainly divided into two levels: the first level uses PLC and DCS as the core to complete electrical transmission control and instrument program control; The second level uses computer software to track and control the filtering and dust cleaning process. Through network communication, the two level systems coordinate and cooperate to achieve automatic control, monitoring, and management of the process.