Product Description
Furnace Description
1. Dimensions of reheating furnace
Centerline spacing of loading and unloading roller track ......... 49000mm
Brickwork length of furnace ..................... 42108mm
Effective length of furnace .....................… 40570mm
Brickwork width of furnace .....................… 12018mm
Internal width of reheating furnace ........................ 11100mm
Elevation of the upper surface of the loading roller track......... +4860mm
Elevation of the upper surface of the unloading roller track......… +4860mm
2. Technical characteristic of reheating furnace
Type of furnace:Walking beam reheating furnace
Type of Reheating Steel:low carbon steel,alloy steel,stainless steel(actual production is carbon steel)
Billet Specification:250X1250X9200(standard billet)),200X1250X10000
Reheating Capacity:Design capability:220t/h
Oxidative burning:0.7%
Unit consumption: 1.2GJ/T (cold charge)
Charging Temperature:cold charge: room temperature
Soaking furnace temperature:1270-1280ºC,Discharging Temperature:1250ºC
Charging and discharging method: pushing by a steel pusher,dragging out by a steel teeming machine
Cooling method: water cooling, non-pressurized water return
Fuel type: heavy oil,9840Kcal/KG,conventional combustion,exchanger preheating
Charging method: single-row charging
3. Burner
Burners for natural gas;
In Zone 1 and Zone 3, top axial burners are used, while in Zone 2 and Zone 4, bottom axial burners are used. Among the burners in Zone 4, 5 of them are equipped with automatic ignition and flame monitoring devices.
Zone 5 and Zone 6 use flat flame burners;
In Zone 7 and Zone 8, the original bottom axial burners have been changed to side burners, arranged on the lower side wall of the soaking section, and all of them are equipped with automatic ignition and flame monitoring devices.
Low nitrogen oxide burners are selected for the combustion system to control nitrogen oxide emissions within 100PPM (converted based on 6% oxygen content, according to local standards in Taiwan).
Natural gas flat flame burner
Air enters the burner from the side, passes through a circular ring with tangential holes, and enters the burner brick at high speed, forming a rotating airflow.Natural gas enters the burner at low speed from the central top of the burner, encounters the exit baffle, and enters the burner brick at a specific angle, mixing and combusting with the air.Due to the wall attachment effect of the rotating flame, a stable flame disc is formed on the furnace roof.
Such a structure can form a stable central negative pressure zone near the burner nozzle, continuously recirculating the combustion products to the burner nozzle, ensuring continuous ignition and stable flame. A reasonable burner brick structure ensures a uniform distribution of the rotating mixed airflow velocity, which is beneficial for the uniform combustion of the burner and the uniform distribution of temperature fields. The organic combination of the burner and the burner brick ensures that the formed flame has a large spread area, small dark core, strong rigidity, and stability.
The burner adopts a unique center wind stabilization technique, which effectively ensures flame stability for slow flame propagation of natural gas.
The pictures are illustrated below:
Flat flame burner specification and quantity:
Type: Low NOx flat flame burner
Natural gas pressure:300mmH2O
Combustion air pressure:300mmH2O
Air preheating temperature:~500ºC
Burner capacity and quantity:Zone 5, Zone 6: 20 sets, 36m3/h;
The adjustable flame burner is a low-nitrogen environmental-friendly combustion device. The overall design incorporates the following features: inner annular gas flow, divided into several streams by a deflecting plate and uniformly ejected in parallel to the axis. The secondary air is supplied in three stages: approximately 5% of the center air is sprayed from the center of the inner annulus, ensuring maximum flame length, rigidity, and strength. The remaining secondary air is ejected from the outer annulus in a combination of swirling and straight streams. The primary air is sprayed at a certain angle for flame stabilization, accelerated air and gas mixing, and ensuring strong flame rigidity without drifting. The secondary air is sprayed parallel to the axis outside the primary air annulus, extending the mixing time with the gas to achieve the required flame length. The special outlet structure of the gas deflecting plate forms a negative pressure recirculation zone, ensuring that the burner flame does not extinguish at maximum capacity. The swirling primary air, while combusting with the gas, can effectively entrain surrounding combustion products, reducing oxygen content and combustion temperature during the combustion process, thus achieving the goal of reducing nitrogen oxide formation.
The pictures are illustrated below:
Adjustable flame burner specification and quantity:
Type: Low NOx adjustable flame burner
Natural gas pressure: 300mmH2O
Combustion air pressure: 300mmH2O
Air preheating temperature:~500ºC
Burner capacity and quantity:
Zone 1, Zone 2, Zone 3: 23 sets, ~250m3/h;
Zone 4: 9 sets, ~286m3/h;
Zone 7, 8: 6 sets, ~223m3/h;
Auxiliary facilities:
There are four burners in Zone 4 and five burners, as well as six burners in Zones 7 and 8, each equipped with automatic ignition and flame detection devices.
Each set of automatic ignition and flame detection device includes:
Ignition control box
Ignition detection controller
Ignition gun
Transformer
Ignition solenoid valve
Center wind
The center wind is derived from the cold air manifold at the outlet of the blower and is delivered to the top flat burners and side adjustable burners of the furnace to maintain flame rigidity and strength.
One manual ball valve is installed on the center wind pipeline in front of each burner.
4. Automation
A new PLC system will be implemented for combustion control.
The PLC system will be based on Siemens S7-414 series.
The main rack of the PLC system includes power module, CPU module, and Ethernet communication module.
The maintenance room will have an engineering station, while the control room will have an engineering station and a HMI station.
The combustion control system is designed to accommodate interface and connection functions for secondary level integration.
A local ET200 station will be established.
Company Profile
Company Profile
Vision
With decades of rapid development and accumulation, China has been perfect and mature on technology and management in various industrial areas, shaping a complete processing manufacturing industry with competitive price, well known for its excellent skill, high efficiency and hardworking team with qualification for personnel dispatching.
At the time of economic globalization, it is our consistent target and objective to integrate and export all kinds of technology, management mode, engineering project and manpower as per the actual requirement of our client With our own abundant technical strength, superior integration capability of technology and resources, well experienced of project implementation and management as basis and platform;
Let China go out to the world, and make the world know of China;
Professional
Professional technical and management team with abundant experience in the implementation of domestic and international projects |
Responsive
Responsive care translating your needs into complete solutions |
Integration
Integrating various technologies and resources in China and fulfilling complementary advantages by relying on professional teams |
Motivation
Motivated to provide optimal solution and quality products |
Exceptional
Exceptional project delivery and execution meeting your expectations |
Our Team
Professional technical team
Prime is staffed with professional import & export team skilled with the practice of import and export business, including sea freight packing, logistics organization, L/C review, cargo booking, and customs clearance, L/C negotiation, double authentication of shipment documents, etc.
All above personnel are well experienced in the execution of projects in Southeast Asia and Middle East.
Complete procurement mechanism
Our professional team of procurement offers strict management of supplier 's qualification inspection and selection, complete system of supplier listing, rating and elimination, to ensure the supplier is qualified and capable of implementing the project and supplied with product of high quality, and maintain a healthy and good condition of credibility, contract settlement and capital flow management.
Quality management system
Our complete quality management system , the process control covering from Scheme formulation , engineering technology, detailed design, to processing and manufacturing of equipment and material , ex-factory test and site erection and commissioning till it put into production, which through multi-level inspection, tour inspection, supervision and node control can ensure quality of the final product.
Well experienced
Executive team is abundant in experience of overseas project implementation with similar project working experiences, esp. experience in Southeast Asia, Middle East projects;
ISO System Certification
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