KR100361315B1 - Corr0sion inhibit and neutralization units of gas boiler - Google Patents

Abstract

The present invention relates to a corrosion prevention and neutralization device of a metal structure designed to neutralize the structure of the condensing gas boiler where the acidic components of the exhaust gas are condensed, and to neutralize the structure and the condensate. Control unit 154 for receiving the input signal of the room temperature controller and the actual variable boiler operating state, supplemental water valve 152 for replenishing water for neutralization, pressure reducing valve 15 for lowering the high pressure to low pressure, required According to the pressure reducing valve 150 and the replenishment water valve 152 for replenishing the water for neutralization neutralizer supply unit 151 to put the neutralizer, the condensed water metal structure, and the pipe connected to the condensed water metal structure Metal structure corrosion prevention and neutralizing device of the condensing gas boiler, characterized in that consisting of (153).

Description

Corrosion prevention and neutralization device for metal structures of condensing gas boilers {CORR0SION INHIBIT AND NEUTRALIZATION UNITS OF GAS BOILER}

The present invention relates to a corrosion prevention and neutralization device for metal structures, which are designed to neutralize the structure of the condensing gas boilers, in which the acid-containing moisture in the exhaust gas is condensed.

Boilers used for heating and hot water supply in general households are divided into oil boilers and gas boilers according to the fuel used. Among them, kerosene is used for oil boilers, and liquefied petroleum oils for gas boilers. Since it uses gas (LPG) and natural gas (LNG), it emits little air pollutants because it contains little sulfur. Such boilers can be divided into various types according to a control method or a sealed state, and can be classified into condensing and non-condensing types according to heat sources for heating heating water for heating heating water.

The condensing method has a latent heat exchanger that heats the heating water by using latent heat of exhaust gas passing through the sensible heat exchanger together with a sensible heat exchanger that directly heats the heating water by using the heat burned by the burner. The non-condensing method is provided with only a sensible heat exchanger. The exhaust gas temperature is lower than that of the general boiler, and condensation of moisture occurs as the temperature of the exhaust gas becomes lower than the dew point in the latent heat exchanger as described above, and the acidic components in the exhaust gas are dissolved in the condensed water. Becomes acidic. This condensate is discharged to the outside of the sewer along the flow path inside.

FIG. 1 is a block diagram showing the inside of a general condensing gas boiler, in which the gas boiler 2 has a blower 10 and a burner 12 arranged on an upper portion of the combustor 4. The upper part is provided with a burner 12 for burning the air and the gas sucked through the intake duct 6 in accordance with the operation of the blower 10, the sensible heat exchanger (14) sequentially below the burner (12) And a latent heat exchanger 16 are arranged. The sensible heat exchanger heat exchanger 14 heats the heating water in the process of sensible heat generated by the burner 12 is directly contacted and heat-exchanged, the latent heat exchanger heat exchanger 16 is generated in thermal contact with the exhaust gas The latent heat is used to heat the heating water.

The exhaust gas passing through the latent heat exchanger 16 is discharged to the outside through the exhaust duct 20, and the condensed water generated in the heat exchange process falls to the metal structure guide 18 and is discharged to the outside. In the lower left part of the gas boiler 2, a circulation pump 22 for circulating the heating water is disposed. When the circulation pump 22 is operated, the heating water that has finished heating in the room is heated through the line L1. Flows into the filter (24). The heating water filter 24 removes impurities contained in the heating water, and the filtered heating water is sent to the upper water separator 26. The separator 26 is for discharging the air contained in the heating water to discharge the air through the upper air vent.

An overpressure preventing valve 32 is installed between the heating water filter 24 and the water separator 26 to prevent the pressure of the heating water from being excessively increased, and sends a part of the heating water to the expansion valve 48. Adjust the pressure The heating water passing through the separator 26 is supplied to the latent heat exchanger 16 through line L2 by the operation of the circulation pump 22 and then heated while passing through the sensible heat exchanger 14. To be discharged to the line L3. Heating water discharged through this line (L3) is supplied to the room according to the operation of the three wear valve (28).

In the middle of the boiler is a heat exchanger 34 to obtain hot water by using the heat of the heating water, the cold water introduced through the line (L6) in accordance with the operation of the hot water flow switch 36 is the hot water heat exchanger (34) It is heated in the course of passing through and discharged through the line (L7). In the lower right part of the boiler, a gas supply device is installed, and according to the operation of the gas valve 44, the gas introduced through the line L8 passes through the line L9 to the nozzle 8 above the combustor 4. Supplied. At this time, the supply amount of gas is changed according to the operation of the air proportional control solenoid valve 46 to compensate for the supply amount according to the change of the outside air. The gas thus supplied is ignited and combusted by the spark transmitted through the ignition transformer 42 and the ignition rod. This series of combustion processes the controller 40 which receives an input signal from the room temperature controller 38 operated by the user. Is controlled by

Conventionally in the condensing boiler operating as described above is used a metal material that is insulated to prevent the contact of the dissimilar metal to prevent corrosion in the presence of moisture and corrosion resistance. It has been known that the corrosion resistance is formed like an oxide film so that the corrosion no longer proceeds. By the way, the acidic component in the exhaust gas is acidic because it is dissolved in the condensed water. Although there is a difference depending on the composition of the metal, the part of the metal oxide film is in contact with the acidic components exceeding the threshold that can withstand the problem of breakdown of the oxide film and the corrosion continues to make the structure vulnerable, thereby deteriorating the life of the parts. In addition, the acid component has a problem that the water quality is environmental pollution when discharged to the outlet.

The present invention has been invented to solve the above problems, it is possible to prevent the corrosion of the metal structure to reach the condensate and neutralize the condensate water by supplying a neutralizer of the alkali component according to the amount of condensate generated per operating time by checking the operating time In addition, by detecting the amount of condensate generated according to the operating time of the condensing gas boiler and supplying an appropriate amount of water or neutralizer to the metal structure part where water is condensed, the moisture in the exhaust gas contains acidic components. It is an object of the present invention to provide a corrosion prevention and neutralizing device for metal structures of condensing gas boilers that can reduce environmental damage by preventing corrosion and neutralizing and discharging acidic components.

1 is a configuration diagram showing the inside of a typical condensing gas boiler,

2 is a block diagram showing a corrosion prevention and neutralizing device for the metal structure of the condensing gas boiler according to an embodiment of the present invention,

3 is a flow chart for explaining the corrosion prevention and neutralizing device of the metal structure of the condensing gas boiler of the present invention.

* Explanation of symbols for main parts of the drawings

150: pressure reducing valve 151: neutralizer supply unit

152: supplementary water valve 153: pipe

154: control unit

Metal structure corrosion prevention and neutralizing device of the present invention for achieving the above object, the control unit 154 for detecting a boiler operating state that actually receives a input signal of a room temperature controller operated by a series of combustion process is operated by the user , Supplementary water valve 152 for replenishing water for neutralization, pressure reducing valve 15 for lowering high pressure to low pressure, pressure reducing valve 150 and supplemental water valve 152 for replenishing water for neutralization, if necessary The neutralizing agent supply unit 151, which can put the neutralizing agent therebetween, characterized in that consisting of a pipe 153 connected to the metal structure, and the metal structure to reach the condensate water.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a block diagram showing the corrosion prevention and neutralization device of the metal structure of the condensing gas boiler according to an embodiment of the present invention, the sensing of the amount of condensed water according to the operating time of the condensing gas boiler in which water is condensed flowing By supplying an appropriate amount of water or neutralizer to the metal structure part, moisture in the exhaust gas contains acidic components, thereby preventing corrosion and neutralizing the acidic components so as to reduce environmental damage.

For example, the mixed gas of gas + air is combusted downward from the burner 12, and heat from the burner 12 is transferred to the sensible heat exchanger 14 and the latent heat exchanger 16 through which the fluid flows. . At this time, the exhaust gas is generated during the heat exchange under the dew point, the water generated is flowed by the metal compound guide 156 consisting of the inclined surface is discharged to the lower hole 157, the exhaust gas is exhaust duct ( 158).

The metal structure for ejecting water is attached to the edge surface 160 of the metal compound guide 156, and the pressure reducing valve 150, the neutralizer supplying part 151, and the replenishment are sequentially provided through the pipe 153 to the metal structure. It is connected to the boiler feed water 155 via the water valve 152. The metal structure is a replenishment water valve 152 which is a solenoid valve controlling a supply amount of water and a pressure reducing valve 150 which reduces a supply pressure, and the water supplied through the metal compound guide 156 through the pipe 153. The neutralizer supply unit 151 is supplied to the inside and supplies a neutralizer between the pressure reducing valve 15 and the supplemental water valve 152.

A protrusion 159 penetrating the exhaust duct inside the exhaust duct 158 is installed on the upper portion of the exhaust duct 158. The boiler duct is periodically supplied with water or neutralizer to the protrusion 159 when the boiler is connected to the circuit duct. The condensate generated at 158 is diluted to prevent oxidation corrosion in the exhaust duct 158. In addition, the pipe 153 connected to the metal structure to reach the condensate water to increase the reaction rate into the sensible portion or latent heat exchanger (14, 16) is supplied to the metal structure. Like a general condensing boiler, a series of combustion processes are controlled by a controller 154 that receives an input signal of an indoor temperature controller operated by a user, and the controller 154 is connected to the burner 12 and the supplemental water valve 152. Each is connected.

The control unit 154 detects the actual variable boiler operation state, the supplemental water valve 152 replenishes water for neutralization, and the pressure reducing valve 150 lowers the high pressure to low pressure. If necessary, a structure or a metal structure in which the condensate water can be put in between the pressure reducing valve 150 and the supplemental water valve 152 for replenishing water for neutralization. The control unit 154 checks the combustion state to determine the amount of replenishment water to open and close the replenishment water valve 152, and the water supplied to the replenishment water valve 152 is supplied by the neutralizing agent supply unit 151 containing the neutralizing agent. The alkaline water is changed, and the water for neutralization through the replenishment water valve 152 and the neutralizer supply unit 151 is a high pressure, thereby supplying water that has been decompressed through the reduction valve 150.

In addition, the pipe 153 connected to the metal structure in contact with the condensate may be supplied through the sensible or latent heat exchanger (14, 16) to increase the temperature to increase the temperature, the neutralizer supply unit 151 is removed Water can be supplied, which is used for dilution.

3 is a flowchart illustrating a metal structure corrosion preventing and neutralizing device of the condensing gas boiler according to the present invention. The water is supplied by the supplemental water valve 152 according to a state checked by the controller 154, and the supplied water is provided. Diluent is diluted. In this case, the closing time of the supplemental water valve 152 is closed by the checked state of the controller 154. In addition, since the water in which the neutralizing agent is diluted in the neutralizing agent supply unit 151 is a high pressure, a pressure reducing valve 150 for lowering the low pressure is installed through the pipe 153.

As described above, according to the present invention, water diluted with a neutralizing agent is supplied to the metal structure to which the acid condensate contacts to prevent corrosion of the metal structure, and the neutralized water is discharged to the sewage outlet, thereby reducing environmental pollution.

Claims (3)

The control unit 154 receives the input signal of the indoor temperature controller operated by the user and detects the actual operating boiler condition, the supplemental water valve 152 for replenishing water for neutralization, and the high pressure to low pressure. A pressure reducing valve 15 for lowering, a neutralizing agent supply unit 151 for putting a neutralizing agent between the pressure reducing valve 150 and a supplemental water valve 152 for replenishing water for neutralization, a metal structure in contact with condensate, and Corrosion preventing and neutralizing device of the metal structure of the condensing gas boiler, characterized in that consisting of a pipe 153 is connected to the metal structure in contact with the condensate. According to claim 1, characterized in that the pipe 153 connected to the metal structure in contact with the condensate water to increase the reaction rate into the sensible portion or latent heat exchanger (14, 16) to supply to the metal structure Anti-corrosion and neutralization of metal structures of condensing gas boilers. When the exhaust gas exchanges water under the dew point, water is generated, and the generated water flows down by the metal compound guide 156 having the inclined surface to be discharged to the lower hole 157, while the exhaust gas is discharged by the exhaust duct 158. In the condensing gas boiler to be discharged, A metal structure for ejecting water is attached to the edge surface 160 of the metal compound guide 156, and the metal structure is sequentially provided through a pipe 153, and a pressure reducing valve 150, a neutralizing agent supply part 151, and a replenishment are provided. It is connected to the boiler feed water 155 via the water valve 152, The metal structure is a supplemental water valve 152 for controlling the supply amount of water and a pressure reducing valve 150 for reducing the supply pressure, and the water supplied through this is supplied into the metal compound guide 156 through the pipe 153. And a neutralizing agent supply unit (151) for supplying a neutralizing agent between the pressure reducing valve (15) and the supplemental water valve (152).