TTJL-70 type 70 kg electric heating test coke oven (bottom charging)
I. Equipment purpose
Conventional and stamping coking test research to determine the most economical coal blending ratio scheme.
II. Process requirements
1. In order to accurately control the coal blending ratio and coal fineness and provide stable conditions for coking, select the process of crushing first then blending.
2. The 70 kg test coke oven project includes: 70 kg electric heating test coke oven, conventional coal blending coking, stamping coal blending coking, coke quenching, and supporting coke detection equipment and auxiliary facilities.
3. Process tests can carry out conventional coal blending and stamping coal blending coking test research, and also explore suitable coal blending conditions based on the cold strength index and thermal strength index of the generated coke, infer the economics and feasibility for production, guide production, and provide data for the rational utilization of coal resources.
4. The furnace chamber adopts a silicon carbide furnace chamber, with good resistance to rapid cooling and heating, low expansion coefficient, no peeling or cracking under cold or hot conditions, and long service life. Specific indicators of furnace chamber bricks: refractoriness ≥ 1770°C, 0.2Mpa load softening start temperature ≥ 1620°C, bulk density 2.50-2.80 g/cm³, apparent porosity ≤ 21%, reheating linear change (1350°C*2h) ≤ +0.2%, cold compressive strength ≥ 85Mpa, thermal shock stability (1100°C water cooling) ≥ 50 times, flexural strength (1100°C*2h) ≥ 20 Mpa, SiC ≥ 86%, Fe₂O₃ ≤ 1.2%.
5. The coking process is electric heating on both sides, bottom coal charging and coke discharging, with high automation and easy operation.
6. Computer controls the furnace wall temperature on both sides, the error between the two sides during constant temperature is less than 5°C, records the coke cake center temperature and top space temperature, with data storage and printing functions.
7. The computer operating system is Win10, the computer starts the control system and modifies system parameters, dynamically displays system operation status and temperature curves.
8. Temperature control adopts artificial intelligence self-adaptive adjustment algorithm, no overshoot or undershoot in heating and constant temperature control.
9. Users can arbitrarily set the heating curve, the program is compiled using temperature-time compilation method, easy and flexible programming.
10. Has functions of sensor (thermocouple) disconnection, reverse connection indication, and over-temperature alarm.
III. Main equipment technical parameters
1. Test coke oven
1.1 Coal charging capacity: 62-88 kg (wet basis, coal charging density 0.72 t/m³ - 1.03 t/m³)
1.2 Effective dimensions of carbonization chamber (length × width × height): 660 × 420 × 650 mm
1.3 Coal charging box dimensions (length × width × height × thickness): 620 × 370 × 590 mm × 5 mm
1.4 Coal cake dimensions (length × width × height): 580 × 370 × (400-500) mm, (add 20 mm asbestos insulation on both sides of the coal cake along the long direction of the charging box, and cover 20 mm asbestos insulation on the top of the coal cake along the height direction)
1.5 Each side of the combustion chamber has 6 silicon carbide rods for heating
1.6 Coking time: 16h-24h (controlled at 22h during normal tests)
1.7 Flue temperature: 1050°C ± 10°C (rated temperature 1350°C)
1.8 Coke cake center temperature: ≥ 950°C
2. Central control system
Adopts Siemens PLC control technology from Germany, computer controls and adjusts heating temperature, the computer controls the heating elements to achieve the required temperature control for the test, with high temperature control accuracy, reliable and convenient use, test data can be stored, displayed and printed.
2.1 Power supply: 380V, 50HZ
2.2 Rated power: 60KW
2.3 Temperature control program: can self-define heating curve and holding time.
2.4 Accuracy: 0.5 level
3. Coal charging and coke discharging system
Lifting system lifting height 1.3m, protects the furnace body. Mechanical charging and discharging, safe and convenient operation
4. Coke quenching system
Adopts water quenching method, with optional dry quenching system.
5. 1/4 coke mechanical strength determination drum (semi-automatic drum door, easy to operate)
5.1 Drum inner diameter: Φ1000mm ± 5mm, drum inner length: 250mm ± 5mm, drum wall thickness: 8mm
5.2 Rotation speed: 25 ± 1 rpm, 100 revolutions time: 4min ± 10S
5.3 Motor: 1.5kw
5.4 Working voltage: 380V ± 10%
6. TTLX-1 coke shatter strength determination device
6.1 Test box: 710mm × 455mm × 380mm, steel plate thickness: 3mm
6.2 Drop height: 1830mm
6.3 Drop table: 1220mm × 965mm × 200mm, steel plate thickness: 12mm
6.4 Motor: 1.5 kW
6.5 Working voltage: 380V ± 10%
7. Coke screening composition sieve (hand sieve)
7.1 Effective sieve area 1000mm × 700mm
7.2 Sieve plate is made by punching 2mm cold-rolled sheet, square holes, sieve holes are 80mm × 80mm, 60mm × 60mm, 40mm × 40mm, 25mm × 25mm
7.3 Wooden sieve frame, with handle
8. Coke drum strength sieve (hand sieve)
8.1 Effective sieve area 1000mm × 700mm
8.2 Sieve plate is made by punching 2mm cold-rolled sheet, round holes, 40mm × 40mm, 25mm × 25mm, 10mm × 10mm
8.3 Wooden sieve frame, with handle
9. TTDG-01 stamping machine:
9.1 Purpose: Used to adjust the density of coal charged into the oven.
9.2 Technical specifications:
Stamping density: 0.72 t/m³ - 1.03 t/m³
Stamping stroke height: 1100 mm
Stamping hammer stroke: 150 mm
Equipment overall dimensions: 5500 mm × 2300 mm × 5600 mm
Working voltage: 380V ± 10%
Equipment weight: 600kg
10. Selection of components and materials for main equipment and auxiliary facilities
The electrical, electronic control, and electric heating components selected for the main equipment and auxiliary facilities have reliable performance. The materials selected for the main equipment and auxiliary facilities are of reliable quality, with excellent manufacturing and reasonable structure.
