Electric Water Heater Inner Tank Production Line Enamel Drying Furnace

Item No.: Enamel Drying Furnace
Work type: Water heater inner tank
Enamel type: wet liningk
Max of Work Size: L×W×=Ø400×H1000(mm);Single tank work:k
Capacity: Based on single tank:100piece/hour
Basic Info
Model NO. EN source
Type Premixed
Use gas type Liquefied petroleum gas LPG, natural gas LNG general type
Control mode Switch control, delay work, section control
Lgnition method Automatic high-pressure ignition
Flame safety detection method Ion bar electric ion flame signal detection
Access caliber in front of valve 1 inch, thread
Burning time range 2~4min
Equipment protection With lack of gas sound and light alarm and protection
Access pressure in front of the burner valve 3-Year Warranty
·Note: all the machines of our company are customized. Please consult the salesman for specific parameters

Product Description
01  Technical Data and Design Plan:
1. Work type: Water heater inner tank
2. Enamel type: wet lining
3. Max of Work Size: L×W×=Ø400×H1000(mm);Single tank work:
4. Capacity: Based on single tank:100piece/hour
5. Production time: 36s/pc
6. Main equipment:
1) Adopt 200-32 type die forging suspension conveyor conveying, length 110m, rhythm running, speed range: 0-3m / min, workpiece hanging interval about 400mm
2) The sintering furnace is heated by electric heating plate, and the heating time is 1-1.5 hours.
3) High temperature air curtain 3 sets
4) Heating system of Sintering Furnace for drying Furnace+Electric heating tube heating


02   Process flow
NO. Process name Process time(min) Process temperature(°C) Notes
1 Upper piece / Normal temperature Hand work
2 Enamel / Normal temperature /
3 Dry 35
120~140 Electrical heating+waste heat heating
4 Inspect / Normal temperature Man-made
5 Sintering 4 820~850 Electrical heating
6 Pump cooling / Normal temperature /
7 Down work / Normal temperature /

03  Enamel line equipment structure and specification type:
1. Design Proposal
1.1 The design of the furnace is based on the inner tank of electric water heat.
1.2 The furnace body structure is a metal steel frame welding structure, suitable for use of detachable assembly structure
1.3 The furnace lining adopts full fiber insulation structure, in high temperature area, the common aluminum silicate refractory fiber which can work over 950 ℃ for a long time is used as the top and side wall lining, and the high strength light brick is used at the bottom. The heat resistant steel for fiber felt is anchored on the outer wall steel net, and the outer layer is covered with 50mm thick rock cotton colored steel sandwich board. The average temperature of the outer wall of the furnace is not more than 15 ℃ (except for import and export).
1.4 The furnace uses nickel-chromium resistance to give tropical heating, the skeleton is made of high temperature and heat resistant stainless steel, the hair tropical zone is distributed on both sides and the middle of the furnace, and the upper and lower layers are arranged. The radiation range includes the height of the workpiece, the heat transfer is fast, and the upper and lower temperatures of the furnace are uniform. Low failure rate, easy maintenance, etc.
1.5The transmission system adopts WT3# I-steel suspension conveying system, frequency conversion stepless speed regulation, overload automatic alarm device, on-line emergency stop device.
1.6 In order to keep the furnace temperature of firing zone stable, reduce the loss of convection heat and reduce the difference of upper and lower temperature in the furnace, five hot air curtains are set up, the hot air curtain is S type, which is set in the high temperature region, the middle temperature zone, the low temperature zone, the hot air curtain adopts the internal circulation structure, and the motor is the 2.2kw/ platform. Totally 6 sets.
1.7 In order to ensure the temperature of firing zone furnace to be stable and reliable and to save energy, the furnace is automatically detected and controlled by digital display temperature microcomputer controller. There are temperature measuring points in high temperature region, middle temperature area and low temperature region.
1.8 Electrical components are made in China or Taiwan.

2. Furnace Body Design
2.1 Structure of firing furnace
12 # double tee steel, 10# channel steel and some other types of channel steel and angle steel, metal square tube and steel plate net are adopted as the main structure frame to fully ensure the thermal structural strength of kiln working. In order to ensure that the stress change of furnace body metal frame is within the normal production requirement, a reserved expansion slot is adopted in the thermal structure frame to ensure that the furnace body is running at high temperature for a long time.
The inside dimension of the sintered zone (high temperature zone) structure is about: length × width × height = 7000 × 2500 × 1600mm.
2.2 The height of the frame structure in the middle and low temperature region of the sintering furnace is basically the same as that in the high temperature region, and the width is reduced to about 2000mm.

3. Lining design
3.1 High temperature area of firing furnace: high quality alum inosilicate refractory fiber bundle felt, flat felt for lining of furnace top and side wall, ore wool or fiber felt for outer layer, anchored with heat resistant steel on steel plate net welded on frame, High strength lightweight brick with a thickness of 0.6-0.8 (bulk density) on the bottom of the furnace with a thickness of 300 mm. for the top and side wall lining
3.2 At the top and side wall of the middle temperature zone, 304 stainless steel Anchorage fiber resistant fiber bundle felt, fiber felt and mineral wool are used. The lining thickness is 250 mm, and the bottom is high strength light brick with 4 skins 0.6-0.8 (volume density).
3.3 A layer of fiber felt is attached to the heat exchange belt and is anchored on the steel plate net with 200 bundles of felt.
3.4 Outer board: 50mm thick rock cotton sandwich board.
3.5 The average temperature of the plate outside the furnace is less than 15 ℃ at room temperature.

4. Transmission design
4.1 Adopting 200-32 type closed rail suspension roller suspension conveyor with a total length of about 110m and minimum turning radius of R600
4.2 Adopt frequency conversion speed regulation motor, electric control device is single configuration (connected with control cabinet), have overload load stop alarm device, start alarm device, line emergency stop device
4.3 The furnace adopts the structure of baking a line, and the enamelled workpiece is hung directly from the hanging tool. The distance is 400mm

5. Hot air curtain design
5.1 3 sets of hot air curtain (6 sets), symmetrical arrangement
5.2 The hot air curtain motor is 2.2KW motor
5.3 Hot air curtain material made of high temperature resistant stainless steel plate

6. Heating system design
6.1 21sets of nickel-chromium resistance heating plate for heating
6.2 The heat plate adopts the skeleton structure, the tropical hair adopts the nickel 80 chromium 20 resistance hair tropical, the skeleton is made of SUS310S high temperature resistant stainless steel, the hair tropical is insulated with the skeleton through the special porcelain cover.
6.3 To lead to the top of the external wiring through the connecting rod

7. Design of Power Control Cabinet and temperature automatic Control system
7.1 Power control cabinet
The total installed power of the furnace is about 600KW. The heating power of sintering furnace is about 480kW, the heating power of drying furnace is about 100kW, the power of motor is about 20kW, the voltage is 50HZ 380V and 220V. Required voltage fluctuation range < 8, if more than 8% should be installed voltage stabilizer. All electrical wiring of the furnace is required to enter the power control cabinet, and automatic control operation can be carried out in the control room
7.2 Automatic temperature control system
7.2.1 The temperature measurement and the instrument (the firing chamber has 10 temperature measuring points, using ceramic thermocouple, medium temperature region, low temperature region, heat exchange area to select the corresponding thermocouple according to the different temperature, The corresponding display instruments are set up in the control cabinet and 10 automatic temperature controllers are set up in the high temperature area.
7.2.2 Total voltage, current numerical display, each control area current display.

8. Operator position, maintenance check backup facility
8.1 At the high temperature of the firing zone, one movable inspection door is left in the middle temperature zone for maintenance, replacement of tropical zone, repair of lining and cleaning of the products in the furnace.
8.2 In high and medium temperature zone, heat-resistant steel pipe is used as frame, lined with aluminum silicate refractory fiber, which requires convenient opening, good heat preservation performance, high degree of airtight and convenient access for people.
8.3 The top of the high temperature area is equipped with maintenance platform and step ladder.

04  Enamel line machine photo:

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