The inner wall material of microwave drying equipment structure is 304 stainless steel plate. Adding thermal insulation materials to the outer layer for thermal insulation is beneficial to the full utilization of energy and energy saving. The outer layer of the equipment is sprayed with bent steel plates. There is an air inlet at the bottom of the equipment for air intake. The top of the equipment is provided with a moisture exhaust hole to exhaust moisture, and the moisture exhaust fan is more beneficial to exhaust moisture in the microwave drying furnace. Promote the drying treatment of wood.
Microwave operating system:
The electric operating system is installed on the operation control dashboard, which centrally operates and controls the microwave energy equipment to realize the setting of microwave energy.
Operation and monitoring, the instrument panel is equipped with operation switch and power selection button to adjust the microwave. Time setter for users to select heating time during operation. Install a power monitoring meter and randomly observe the stability of microwave heating equipment. At the same time, it is also equipped with a temperature display screen, which is convenient for monitoring temperature changes. A protective emergency stop switch is installed at the operating position to ensure safe shutdown due to failure during operation.
The economic analysis is as follows:
Usually, when selecting equipment, users only consider how to save equipment investment. It's just a piece of cake not to know the value of equipment input relative to processed wood. With an annual output of 2,000m3, the investment in equipment with good performance generally needs 200,000 yuan, but the value of 2,000m3 wood is sometimes as high as 6,543,800 yuan. It is an indisputable fact that good equipment and reasonable automatic control can increase wood drying output by 5% compared with simple manual equipment. A 5% increase means saving 500,000 yuan every year. From this perspective alone, it is much more economical to spend 200,000 yuan on equipment with good performance than to spend 65,438 yuan+10,000 yuan on simple equipment.
For example, the preliminary design of microwave drying equipment is 40kw/h and the auxiliary energy consumption is estimated to be 50kw/h for analysis:
Specification of wood block: length = 930mm, width =160mm, thickness =130mm.
Drying method: stacking method is adopted. Stacking requirements: 1) Wood specifications shall be uniform, and shall not be mixed;
2) The moisture content of wood should be roughly the same;
3) unify material requirements;
4) Stacking side should be flush;
5) The core and sapwood of wood should be placed separately. The core material should be placed in the upper part of the middle, and the sapwood can be used as a pad when its thickness is within the range of 40 mm ~ 50 mm. ..
Stacking requirements: the spacing between each board is equal to 20 mm ~ 30 mm, and 10 boards are placed on each floor. The second layer should be placed at 90℃, and the 10 plates should be put together. 1 1 layer has been piled up. The distance from each layer of material to the microwave inner wall =250mm~300mm, and the total number =10x11=10.
Calculated total stacking volume: the volume of each wood = 960x160x130 = 0.0194 (cubic meter).
Accumulation volume = 0.0194x110 = 2.134 (m3)
The height and space occupied by stacking timber =130x11=1430mm.
The parameters of the internal space of microwave drying room (kiln) are: (length× width× height) = 2500 x1600 x1700 mm.
Weight of material moisture content: the initial moisture content of wood is initially set at 60%.
The final moisture content of wood = 12%
Set the basic density of wood =0.4t/m3.
Disposable capacity of microwave equipment =2 cubic meters.
Estimated total weight of water in the material =1000x0.4 (0.6-0.12) x2.
= 384 kg (water)
The equipment consumes 50kw/h per hour, and it takes 2 hours to treat and dry each furnace. The total power consumption for each startup is 100Kw/h, that is, 100 kWh.
Analysis (1) If the electricity charge per kwh is simulated as 1.00 yuan/kwh, the total electricity charge 100 kwh = 100 yuan; The total number of plates processed in each heat =55, and the cost of each plate processing is shared equally =100/55 =1.81yuan.
Analysis (2) If the electricity charge per kwh simulates 0.8 yuan/kwh electricity price, calculate the total electricity charge 100 kwh =80 yuan; The total number of plates processed per heat =55, and the cost of each plate processing is shared equally =80/55= 1.45 yuan.
Analysis (3) If the electricity charge per kwh simulates 0.6 yuan/kwh electricity price, calculate the total electricity charge 100 kwh =60 yuan; The total number of plates processed per heat =55, and the cost of each plate processing is shared equally =60/55= 1.09 yuan.
Analysis (4) If the electricity charge per kwh simulates 0.5 yuan/kwh electricity price, calculate the total electricity charge 100 kwh =50 yuan; The total number of plates processed in each furnace =55, and the cost of each plate processing is shared equally =50/55=0.90 yuan.
The above is an economic analysis and comparison, which should be compared and analyzed according to the power supply price and power supply peak avoidance in various regions. How to improve economic benefits and get returns, and how to make use of the most favorable factors of electric energy for technology investment and decision-making, or make appropriate choices according to actual production needs.