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Zhengzhou Ansheng Scientific Instrument Co., Ltd
Jinan Box type Resistance Furnace (Table type)
NegotiableUpdate on 06/04
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Overview
Jinan box type resistance furnace (desktop) is a universal heating equipment. According to their appearance, they can be divided into box furnaces, tube furnaces, crucible furnaces, etc. Muffle furnace is translated from English as Muffle furnace. Muffle means package, furnace means stove, and melting pot means furnace. The common names for muffle furnaces in China are as follows: electric furnace, resistance furnace, Maofu furnace, and muffle furnace. Muffle furnace is generally a high-temperature furnace provided for laboratories, with different names. The products referred to are of the same category and are collectively referred to.
Product Details
How to choose a reasonable combustion method for Jinan box type resistance furnace (table type)
In the field of high-temperature combustion, analyzing and improving existing combustion methods, exploring and experimenting with new combustion methods, in order to continuously improve fuel utilization and the technical level of combustion equipment.
Combustion refers to the process in which combustible components (carbon, hydrogen, sulfur, and hydrocarbons) in fuel combine with oxygen in the air and undergo a violent chemical reaction at a certain temperature, releasing light and heat. *Combustion refers to the combustion of combustible components in fuel, which are completely burned without emitting black smoke when the air supply and supply method are appropriate. Otherwise, it will not burn.
1. To achieve the economic operation indicators of the muffle furnace, it is necessary to solve the problem of fuel combustion
2. A sufficiently high furnace temperature
Temperature is the primary condition for fuel combustion. The low temperature required for the fuel to undergo a violent oxidation reaction is called the ignition temperature. The heat required to heat fuel above the ignition temperature is called a heat source. The heat source for fuel ignition in the combustion chamber generally comes from
The thermal radiation of flames and furnace walls, as well as their contact with high-temperature flue gas. The furnace temperature composed of a heat source must be maintained above the ignition and combustion temperature of the fuel, that is, it must have a sufficiently high furnace temperature for the fuel to burn continuously. Otherwise, the fuel will be difficult to ignite, unable to burn, or even cut off.
3. Moderate amount of air
Fuel must be in sufficient contact and mixed with sufficient air during combustion. When the furnace temperature is high enough, the combustion reaction rate is very fast, and the oxygen in the air will be quickly consumed. It is necessary to supply sufficient air. However, in actual operation, there is excess air sent into the furnace, but the excess air should not be too much and should be appropriate to avoid lowering the furnace temperature.
4. Sufficient combustion space
Combustible substances or small coal shavings volatilize from the fuel and burn while flowing with the flue gas. If the furnace space (volume) is too small, the flue gas flows too quickly, and the residence time of the flue gas in the furnace is too short, the combustibles and coal shavings cannot be fully burned. Especially when combustible materials (combustible gases, oil droplets) come into contact with the heating surface of the boiler before they are completely burned, the combustible materials are cooled below the ignition temperature and cannot burn, forming carbon nodules. At the same time, ensuring sufficient combustion space is conducive to the full contact and mixing of air and combustibles, allowing combustibles to burn fully.
5. Enough time
The process from incomplete ignition to complete combustion of fuel requires a certain amount of time, especially in layered combustion furnaces where fuel combustion requires sufficient time. The larger the combustion particles, the longer the combustion time. If the combustion time is not enough, the fuel will not burn.
Specification parameters:
model |
AS-1400 |
Temperature parameters |
1400℃ |
Voltage AC |
220V/380V |
rated temperature |
1400℃ |
Long term working temperature |
1350℃ |
Uniformity of temperature field inside the furnace |
±5℃ (depending on the size of the heating chamber) |
Temperature measuring components and temperature measuring range |
Platinum rhodium platinum S temperature measurement range 0-1700 ℃ |
Program curve segment |
30 paragraphs |
heating rate |
1 ℃/h-40 ℃/min, recommended 20 ℃/min |
Heating element |
Elema |
Thermal insulation material |
Imported high-purity alumina fiberboard |
Cooling method |
Double layered furnace shell, air-cooled |
Furnace body temperature |
≤ 50 degrees |
Warranty scope and duration |
The electric furnace comes with a one-year free warranty, and the heating element is not covered by the warranty (natural damage within three months can be replaced free of charge) |
Customer selection |
1. Crucible, box bowl, corundum furnace pad/silicon carbide pad 2. RS485 communication, computer control software and hardware 3. Touch screen controlled temperature controller 4. Paperless recorder 5. Increase exhaust ports 6. Consumables: Heating elements, temperature measuring components 7. Increase observation ports and endoscopes |
Furnace specifications:
specifications |
Furnace dimensions (depth, width, height mm) |
voltage |
Power kw |
PID instrumentcontrol accuracy |
A |
100x100x100 |
220 |
1 |
±1 |
B |
150X100X100 |
220 |
1.5 |
±1 |
C |
200X150X150 |
220 |
2 |
±1 |
D |
300X200X120 |
220 |
4 |
±1 |
E |
200×200×200 |
220 |
6 |
±1 |
F |
300×200×200 |
220 |
8 |
±1 |
G |
300X250X250 |
220/380 |
8 |
±1 |
H |
300×300×300 |
220/380 |
10 |
±1 |
I |
400X250X160 |
220/380 |
8 |
±1 |
J |
400×300×300 |
220/380 |
12 |
±1 |
K |
500×300×200 |
220/380 |
15 |
±1 |
L |
500×300×300 |
380 |
18 |
±1 |
M |
500X400X400 |
380 |
20 |
±1 |
N |
500×500×500 |
380 |
25 |
±1 |
U |
800×500×500 |
380 |
40 |
±1 |
V |
1200×500×500 |
380 |
85 |
±1 |
W |
1200×800×800 |
380 |
110 |
±1 |
Jinan Box type Resistance Furnace (Table type)Special furnace dimensions can be customized according to customer requirements!
The correct operation process of high-temperature box type resistance furnace
The specific process operation of the box type resistance furnace is as follows:
1. Check the "shift handover record" before starting work.
2. Operators should wear the prescribed protective equipment and be familiar with the "safety operating procedures".
3. Check the lubrication condition of the axle and slide rail of the furnace door opening mechanism.
4. Check the installation and fastening of the furnace lining, resistance wire, and thermocouple lead out rod, and verify if the instruments are functioning properly.
5. Check that the resistance wires at the bottom of the furnace, the bottom plate of the furnace, the transmission mechanism of the movable furnace bottom, and the motor lead wires are in good condition.
6. Check the cleanliness of the furnace and clean the oxide scale.
7. Newly repaired furnaces should be dried according to the "process specifications".
8. Cut off the power and proceed with the baking process according to the "process specifications".
9. Close the door of the box type resistance furnace.
10. Insulate according to the "process regulations".
11. Power on heating.
12. Cut off the power after work.
13. Produce the furnace according to the "process specifications".
14. Reinstall the furnace and repeat the above procedure.
When the box type resistance furnace is operated continuously, the "handover record" must be carefully filled out, and the handover must be clearly handed over to the successor in person.
16. Maintain and upkeep the equipment according to the "Equipment Maintenance Regulations".
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