SCOTCH STEAM GENERATOR

1.00-DEFINITION OF STEAM GENERATOR :

– Steam Generator is designed to burn gas and liquid fuel. Operating pressure is 8 bar test pressure 12 bar.

Steam generator type BsY and models are listed as follows.

BsY 150, BsY 250, BsY 500, BsY 750, BsY 1000, BsY 1250, BsY 1500, BsY 2000 BsY 2500, BsY 3500

• COIL PIPE:

– Horizontally positioned special coil pipe is made of St 35-8 quality 3,6 / 5 mm thick steel drawn pipes in accordance with TS EN 10216-2.

1.02- COIL BEND:

– In accordance with TS EN 13445-4 norms, it is bent with special molds so that the diameter does not exceed 10% and there is no need for heat treatment.

1.03- COMBUSTION CELL:

– Radiation type is designed according to burner flame length and flame diameter.

– Pipe coils are intertwined, twisted in the form of screws, made of pipe inspection. Thus, three passes were made to hot gases.

– Gases continue from the combustion chamber, pass between the 1st pipe coil and the 2nd pipe coil, return through the cover, 2nd pipe coil and the envelope and go to the chimney.

Thus, three passes were made to the gases, their paths were extended and all their energy was taken.

– The cover and counter wall of the combustion chamber are covered with a special refractory material resistant to 1350 ° C. Although the combustion stopped, the temperature of the cell was not lowered, and the soot burning of the generator in the first firings was prevented since the re-jetting fuel quickly reached the ignition temperature in an environment of approximately 900 ° C. Thus, clogging of gas paths with soot was prevented and high combustion efficiency was achieved.

RESULT: Steam is ready to be used within 3 minutes from the moment you press the first button.

2.00- SAFETY AND CONTROL DEVICES IN STEAM GENERATOR:

2.01- 1. PRESSURE STAT:

– In single-stage burners, it controls the 1st stage. When the steam pressure reaches the desired value, it stops the burner.

2.02- 2. PRESSURE STAT (SAFETY):

First pressure stat is adjusted to 0.5 Atu.

If the 1st pressure stat is defective, the pressure continues to load. The second pressure stat opens the circuit and stops the burner. 

2.03- 3. PRESSURE STAT:

– In the double-stage burner, it burns th 2 stages.

2.04- STEAM THERMOSTAT:

Single contact digital thermostat is set at 20 ° C above the saturated steam temperature at operating pressure (195 ° C for 8 bar).

If the 1st pressure stat and 2nd pressure stat fails, because the burning continues, when the steam temperature exceeds the set value, it opens the circuit and stops the burner.

2.04- STEAM THERMOSTAT:

Single contact digital thermostat is set at 20 ° C above the saturated steam temperature at operating pressure (195 ° C for 8 bar).

If the 1st pressure stat and 2nd pressure stat fails, because burning continues when the steam temperature exceeds the set value, it opens the circuit and stops the burner. 

2.05- FLUE GAS THERMOSTAT:

– Single contact digital thermostat is set at 250 ° C.

If the 1st pressure stat, 2nd pressure stat and steam temperature thermostat is defective, burning continues, when the flue gas temperature rises above the set value, it opens the circuit and stops the burner.

2.06- SAFETY VALVE:

– A selected diameter of 10 Atu is adjusted to discharge the steam produced.

– If the 1st pressure stat, 2nd pressure stat, steam thermostat, flue gas thermostat are defective, it opens if the steam pressure rises above the set value and if the steam pressure rises above the set value, it opens and discharges the steam.

3.00- STEAM GENERATOR INSTALLATION:

– Steam generator should be installed in the closest place where the steam it gives off will be used.

– The water flowing from the steam generator drain, feed water pump or armatures should be given to the sewer with the help of a floor filter without dispersing.

– Sufficient gaps should be left around it for easy operation and maintenance.

– It should be such that it is possible to remove the coil in the distance between the top of the boiler and the ceiling. If this distance is not sufficient, a hole must be left in the ceiling sufficient to remove the coil. (Putting on a cover etc.)

– Natural ventilation should be provided with grilles placed at the ceiling or floor level so that the temperature in the place where the steam generator is located does not exceed 30-35 ° C.

– In order not to increase the temperature of the place where the Steam Generator is located, the generator flue outlet, condensate tank, steam and hot water pipes should be isolated.

– In the forced ventilation system, it is not recommended to draw air from the steam generator (aspiration ventilation). The negative pressure created in this way reduces the combustion efficiency of the generator. 

3.01- STEAM GENERATOR AND CHIMNEY DIAMETERS:

– Steam generator capacity and approximate chimney diameters table.

Steam capacity (Kg / h): 150 250 500 750 1000 1250 1500 2000

Capacity (Kcal / h): 90 150 300 450 600 750 900 1200

Chimney diameter (mm.): 250 250 300 300 350 350 400 450

90 ° bends and “T” shaped connections should be avoided as much as possible in the smoke duct. When it is necessary to make it at an angle, it should not be less than 135 °. Horizontal smoke duct length should not exceed 1/3 of the chimney height..

If the smoke duct is long, it should be isolated. The chimney cap should be designed in such a way that it does not prevent the escape of burnt gases.

3.02- ELECTRICAL CONNECTIONS:

– The main fuse group and breaker switch should be placed in the electrical panel where energy is taken.

– 3 phase, 1 neutral 380 volt energy must be connected with a cable with sufficient cross-section until the control and control panel input.

– The generator is connected to the grounding plate with a cable of sufficient cross-section. 

3.03- VOLTAGE AND FREQUENCY:

– Check your voltage and frequency with the voltage and frequency on the boiler label. Measure the voltage and frequency in the circuit, it should not be less or more than 10% of the nominal value.

3.04- ELECTRICITY CONSUMPTION IN STEAM GENERATOR (Kw):

Steam generator

Type 150 250 500 750 1000 1250 1500 2000

Burner 1.1 1.5 1.5 2.2 2.2 2.2 3 4

Circulation pump. 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1, 1 1, 1

Control energy 1 1 1 1 1 1 1 1

Total 3.2 3.6 3.6 4.3 4.3 4.3 5.1 6.1

3.05- CONDENSE TANK:

Type 150 250 500 750 1000 1250 1500 2000

Volume (lt.) 70 100 150 220 330 450 600 700

– The height of the water level of the condensate tank from the pump suction opening:

Condensate temperature (° C): 50 60 70 80 90 100

Height from pump suction nozzle (m.): 1,5 1,5 2 2,5 3 3,5

– Condensate tank water supply should be made with a copper float float.

3.06- WATER SOFTENER:

– It should automatically backwash, regenerate and wash.

– There should be 20-30 mmSS pressure at the raw water inlet, and the raw water inlet should not exceed 35 fr hardness.

– Soft water output should not exceed 0.2 Fr hardness.

– Hot water should not return to the water softener. For this, a check valve must be placed at the condensate tank entrance.

3.07- DOSING PUMP:

-In order to prevent limestone formation, sufficient amount of CEFOPOL should be dosed to the feedwater pump suction. (Approximately 100 kg 150 grams CEFOPOL, depending on the amount of soft water added).