KR200245375Y1 - High Efficiency once-through Boiler with Economizer - Google Patents

Abstract

The present invention is equipped with a hot water generating device in the flue of the conventional perfusion boiler consisting of a gas burner, combustion chamber, flue and other auxiliary devices in the boiler body, thereby improving the boiler thermal efficiency and energy saving and environmental pollution by the thermal efficiency The present invention relates to a high-efficiency boiler that can be prevented. In the case of using a conventional perfusion boiler, the sensible and latent heat of steam contained in the combustion gas is not completely absorbed, and the atmospheric discharge temperature of the combustion gas is discharged at a high temperature of 240 ° C. or higher. The thermal efficiency of the type boiler is low, and it is also included in the combustion gas, which has a problem that greatly affects the environmental problems due to the inability to purify CO ₂ and NOx, which are hazardous substances.

Therefore, when the hot water generator is installed in a conventional once-through boiler, the sensible and latent heat of steam contained in the combustion gas is almost absorbed, so that the heat efficiency of the once-through boiler is improved to 95 to 97%, and the boiler thermal efficiency. It can save more than 10% of the energy, and also has an excellent effect of reducing the amount of CO ₂ and NOx, which are harmful substances of the combustion gas, to 2% and 30PPM, respectively.

Description

High Efficiency once-through Boiler with Economizer

The present invention relates to a high efficiency perfusion boiler having a hot water generator (Economizer) in the flue of the boiler.

Commonly used boilers include a furnace pipe and a furnace barrel, and a furnace tube boiler with an furnace tube and an evaporative heat transfer surface of the boiler is formed of a plurality of small diameter (30-100 mm) water pipes. Water tube boiler that heats the water outside the tube, the boiler boils and evaporates the water at a temperature lower than 100 ℃ in a vacuum state, and the boiler is vacuumed and the indirect heating vacuum boiler, and the heater maintained without pressure The water inside the preheating part consists of a pressureless irrigation boiler and a tube system, which is heated to a temperature below the boiling point while the water inside is circulated up and down inside the fire chamber liquid as the burner burns. Through the evaporation section and the superheating section in turn, use a perfusion boiler to draw out the required steam to the main steam. There.

Such boilers can not exhibit more than 90% of the thermal efficiency, and is discharged through the combustion gas outlet of a high temperature of 240 ℃.

In addition, the high calorific value is 10500 kW, the low calorific value is 9550 kPa, the general calorific value is based on the low calorific value, and the boiler efficiency is usually 85 to 89% of the low calorific value.

In industrial boilers using gaseous fuel, a large amount of CO ₂ , CO, and NOx is generated from the combustion chamber. Especially, NOx is found to be a major cause of engineering smog and emissions are strictly regulated at present.

Therefore, it has become a basic requirement of the boiler industry for complete combustion, and in addition, how much CO ₂ , CO, and NOx can be reduced without departing from the conventional maximum flow rate standard of the unburnt in the combustion gas determines the performance of the industrial boiler. It is becoming a very important item.

The conventional perfusion boiler is composed of a gas burner, a combustion chamber, a flue, a feed water pump, and a main body.

In the combustion chamber equipped with the gas burner, the city gas is burned and heat is transferred to the irrigation water. The exhaust gas flows in the (Omega) OMEGA FIOW method and the exhaust gas flows in the flue direction. At this time, the temperature of the exhaust gas discharged to the atmosphere is a high temperature of about 240 ℃ or more, and the heat contained in the combustion gas is discharged outside, the heat efficiency of the boiler is about 85 to 89%, and also harmful emissions contained in the combustion gas The material CO ₂ , CO, NOx was discharged without purification, there was a problem affecting the environmental problems.

The purpose of the present invention is to absorb the sensible and latent heat of water vapor contained in the combustion gas to increase the efficiency of the boiler to 95-97%, and also to reduce the harmful substances CO ₂ , CO, and NOx in the combustion gas. It is to provide a high-efficiency once-through boiler with a hot water generator equipped with a fin water pipe, which has an effect and prevents environmental pollution.

In order to achieve the above object, in a perfusion boiler composed of a gas burner, a combustion chamber, a flue, a feed water pump, and other accessory devices in a boiler body, a hot water generator is installed in a flue and a neutralizer is installed. It can be achieved by the bar, will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram of a high efficiency perfusion boiler according to the present invention

FIG. 2 is a layout view of the hot water generator B and the fin water pipe A shown in FIG.

Figure 3 is a schematic diagram of the neutralization treatment apparatus according to the present invention

<Description of the code | symbol about the principal part of drawing>

1: boiler body 2: gas burner

3: combustion chamber 4: flue (exhaust gas outlet)

5: boiler panel 6: blower

7: hot water generator 8: fin water pipe

9: Hot water generator device zone 10: Neutralization treatment device

11: condensate pipe 12: condensate container

13: drain pipe 14: magnesium

According to the present invention, as shown in Figure 1, the high-efficiency perfusion boiler having a water pipe hot water generator is composed of a gas burner (2) and a combustion chamber (3) in the upper center of the main body (1) and the flue at the end leading to the discharge flow. (4) and the hot water generating device (7) is fixed to the year and the water supply pump is connected to the inlet of the fin water pipe (8) to supply water and the neutralization treatment device (10) is installed below the fin water pipe (8) to condensate It is provided with the pipe 11, the condensate container 12, and the drain pipe 13.

Referring to FIG. 2, the fin water pipe 8 embedded in the hot water generator 7 is shown in FIG. The fin water pipe 8 according to the present invention has a heat transfer surface at which the heat exchange of the cold water of the combustion gas is made of 0.8 mm fins, which is improved than the heat transfer area of the conventional hot water generator 7 and is attached to the conventional perfusion boiler. It brings about 1.5 times more heat transfer effect than hot water generator.

Therefore, when cold water passes through the fin water pipe 8, the combustion gas passing through the cold water in the fin water pipe 8 and the hot water generator 7 is heat-exchanged through the fin water pipe 8. At this time, the cold water absorbs the latent heat of condensation and sensible heat of the water vapor contained in the combustion gas, so that the combustion gas falls below the dew point of about 70 to 80 ° C, passes through the hot water generator 7, and is discharged to the atmosphere through the exhaust port. .

Thus, since the cold water of the fin water pipe 8 absorbs about 10% of sensible heat and latent heat of steam, the efficiency of the high efficiency perfusion boiler according to the present invention is improved to 95 to 97%.

Referring to FIG. 3, FIG. 3 shows the neutralization apparatus 10 shown in FIG. 1 in more detail. The neutralization apparatus 10 is for purifying the waste water condensed with the water vapor of the combustion gas by heat exchange in the hot water generator 7, the container of the neutralization treatment apparatus for neutralizing the hot water generator 7 and the condensed water ( 12 is connected by the condensate pipe 11 and the drain pipe 13 is attached to the lower portion of the neutralization apparatus.

The vessel 12 of the neutralization apparatus configured as described above has a size of 30 L, and when 20 L of condensed water is collected, the magnesium is manually adjusted to 6.5 to 7 and then discharged.

The reaction equation where H ₂ CO ₃ and NHO ₃ in the condensed wastewater is neutralized by magnesium is as follows.

H ₂ CO ₃ + Mg → MgCO ₃ + 2H ⁺

(Magnesium Carbonate)

HNO ₃ + Mg → MgNO ₃ + 2H ⁺

(Magnesium Nitrite)

As described above, H ₂ CO ₃ and NHO ₃ react with magnesium (14) to neutralize the wastewater and discharged to the river. At this time, the magnesium remaining in the neutralization container is melted while changing together.

High-efficiency perfusion boiler with a hot water generating device according to the present invention generates about 95 to 97% of heat efficiency based on low calorific value, and about 87 to 88% of heat efficiency when high calorific value is generated.

In addition, since the high-efficiency boiler of the present invention uses fuel as a city gas, unlike coal and oil, there is no sulfur (S) component that corrodes metal under dew point, and it is always completely burned so that no soot occurs. When the temperature of the combustion gas passing through the hot water generator falls below the dew point, condensate is generated on the heat transfer surface.The condensate is neutralized by the neutralization device to the environmental standard of PH 6.5-7, and is released into the stream, thereby reducing the pollution of the stream. Excellent effect on environmental protection.

As a use of the high-efficiency boiler with a hot water generating device according to this can be used in industrial, bath, pool, sports center, etc., it can provide an excellent effect on fuel savings.

Claims (2)

In a perfusion boiler in which a gas burner (2) and a combustion chamber (3) are formed at the upper center of the boiler and the flue (4) is arranged in sequence at the end portion leading to the discharge flow, the hot water generating device made of stainless steel in the flue (4) ( 7) is installed so that the cold water in the fin water pipe 8 absorbs the latent heat and sensible heat of the water vapor contained in the combustion gas, so that the combustion gas is discharged to a temperature below the dew point, and neutralized by the hot water generator 7. High-efficiency perfusion boiler with a hot water generator, characterized in that the device 10 is connected by a condensate tube. According to claim 1, wherein the neutralization treatment device 10 is a neutralization treatment device 10 for neutralizing the condensed water of the hot water generating device 7 is connected to the hot water generator 7 by the condensed water 11, the neutralization treatment A drain pipe 13 for discharging the wastewater neutralized in the device container 10 to the stream is installed under the neutralization treatment device, and is provided with a hot water generator, which neutralizes and discharges the wastewater to PH 6.5˜7, which is an environmental standard. One high efficiency perfusion boiler.