KR102075062B1 - Waste heat recovery boiler with separating type lower drum for easy dust removal and easy water circulation - Google Patents

Abstract

The present invention relates to a lower drum-separated waste heat recovery boiler with easy dust removal and water circulation, capable of preventing dust contained in high temperature exhaust gas from being deposited and adhered to the inside and facilitating circulation of boiler water. According to the present invention, the lower drum-separated waste heat recovery boiler with easy dust removal and water circulation comprises: a cooling chamber configured to decrease the temperature of exhaust gas; a heat recovery chamber provided with a heat recovery unit; a discharge duct installed in the heat recovery chamber; and a hopper unit installed to be connected to the portion below the cooling chamber, the heat recovery chamber, and the discharge duct to collect dust.

Description

Waste heat recovery boiler with separating type lower drum for easy dust removal and easy water circulation}

The present invention relates to a waste heat recovery boiler, and in particular, while the boiler water is heated by heat exchange using hot exhaust gas discharged from the incinerator by waste incineration, dust contained in the hot exhaust gas is deposited therein. And a lower drum separation type waste heat recovery boiler that facilitates dust removal and circulation, thereby preventing the attachment of the boiler water.

In general, hot exhaust gases generated during incineration, such as incinerators, contain a large amount of dust that is harmful to the human body, and if released to the atmosphere as they are, may cause serious environmental pollution.

Therefore, conventionally, a number of heat recovery boilers have been disclosed that utilize waste heat of high-temperature exhaust gas and at the same time reduce dust harmful to a human body.

In this regard, Patent Document 1 is an incinerator for flow-burning the flow sand and waste and a waste heat boiler to produce steam by absorbing the combustion heat of the incinerator is formed integrally, the waste heat boiler is a two-drum independent vertical natural circulation type The upper part of the waste heat boiler, characterized in that it comprises a steam drum of the upper, the lower male drum, the tube bank connecting the steam drum and the male drum and serving as a support structure, the membrane panel having a space for moving the hot exhaust gas Incinerator was provided.

However, in the case of Patent Document 1, there is a concern that dust contained in the high-temperature exhaust gas is attached to the tube bank or deposited on the male drum located at the lower portion.

And, at present, unlike Patent Document 1, it is a situation that the waste heat recovery boiler that makes the circulation of the boiler water more smoothly.

Patent Document 1: Domestic Patent No. 10-1417680 (Registration Date: July 1, 2014)

Accordingly, the present invention, while heating the boiler water through the heat exchange using the hot exhaust gas discharged from the incinerator by waste incineration treatment, while preventing the dust contained in the hot exhaust gas deposited and attached to the inside. It is an object of the present invention to provide a lower drum separated waste heat recovery boiler that facilitates dust removal and water circulation, which facilitates water circulation.

In order to achieve the above object, the present invention, in the waste heat recovery boiler for heating the boiler water using the hot exhaust gas discharged from the incinerator by waste incineration treatment, the inlet space into which the hot exhaust gas discharged from the incinerator is introduced It is formed on one side, the first discharge space for exhaust gas is formed on the opposite side, the moving space is provided with a plurality of partition walls that allow the exhaust gas to move from the inlet space to the first discharge space while continuously changing the direction It is formed between the inlet space and the first exhaust space, the cooling chamber to lower the temperature of the exhaust gas, and installed in the cooling chamber to be connected to the first exhaust space, from the high temperature exhaust gas supplied through the first exhaust space The heat recovery chamber is provided with a heat recovery unit for recovering heat through heat exchange, and exhaust gas having a lower temperature is discharged through the heat recovery unit. A discharge duct installed in the heat recovery chamber, and a hopper portion which is installed under the cooling chamber and the heat recovery chamber and the discharge duct to collect dust, and the heat recovery portion is installed below the upper steam drum and the upper steam drum. A lower first and second water drums, a plurality of first and second heat pipes connecting the upper and lower first and second drums respectively to both upper steam drums, and a plurality of first and second heat pipes formed between Compartment heat pipes installed in the maintenance space to partition the maintenance space in a zigzag form, a soot blower installed in the first and second heat pipes so as to be located in the maintenance space divided into a plurality of spaces, and the lower first and second water. And a second discharge space formed between the drums and connected to the hopper, wherein the boiler water circulated in the upper steam drum, the lower first and second drums, and the first and second heat pipes and the compartment heat pipes is discharged at a high temperature. Steam is heated by heat exchange with the boiler, the steam generated by the heating of the boiler water is stored in the upper steam drum, dust attached to the plurality of first and second heat pipes are separated through the soot blower and discharged from the second discharge space hopper It provides a lower drum separation type waste heat recovery boiler easy dust removal and circulation, characterized in that collected in the part.

The present invention has an effect of preventing dust from adhering to a plurality of first and second heat pipes through cleaning through a soot blower.

In addition, even through manual cleaning through the maintenance space formed between the plurality of first and second heat transfer tubes, there is an effect of preventing dust from adhering to the plurality of first and second heat transfer tubes.

In addition, the dust separated in the first and second heat pipes is discharged to the second discharge space formed between the lower first and second drums without being deposited on the lower first and second drums.

That is, there is an effect of preventing the heat exchange efficiency of the first and second heat transfer tubes from being lowered by the deposition and deposition of dust.

In the present invention, since the angle between one side of the first and the second heat pipes positioned at the first and the second heat drums in the lower first and second drums is formed to be 90 ° or more and 180 ° or less, a gap between the plurality of first and second heat pipes. This has a wider effect.

That is, the dust separated from the plurality of first and second heat pipes is stuck between the plurality of first and second heat pipes again, or is prevented from being deposited between the first and second heat pipes and the lower first and second drums. Giving effect.

In other words, there is an effect of preventing the heat exchange efficiency of the first and second heat transfer tubes from being lowered.

In addition, since the spacing between the plurality of first and second heat pipes is wide, there is an effect that another heat pipe can be additionally installed later to increase the amount of steam in the boiler.

In the present invention, since the lower first and second water drums are installed side by side under the upper steam drum, the boiler water is dispersed in the lower first and second water drums on both sides of the upper steam drum, thereby easily circulating.

In addition, since the boiler water is circulated between the lower first and second water drums through the water circulation tube, the boiler water is more easily circulated.

That is, by the easy circulation of the boiler water, there is an effect that the heating of the boiler water and the generation of steam are steadily reduced without deterioration.

According to the present invention, after the high temperature exhaust gas discharged from the steam dryer by waste water and sewage sludge drying is burned in an incinerator, the waste heat treatment is included in the high temperature exhaust gas discharged from the incinerator to exchange heat with the first and second heat pipes. There is.

1 is an installation state of the lower drum separation type waste heat recovery boiler easy dust removal and circulation according to an embodiment of the present invention.
2 and 3 is a detailed view of the lower drum separation waste heat recovery boiler easy dust removal and circulation according to an embodiment of the present invention.

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

As shown in Figures 1 to 3, the lower drum separation type waste heat recovery boiler 1000 is easy to remove dust and circulate according to an embodiment of the present invention is installed in the incinerator (1). It is used to heat the boiler water using the hot exhaust gas discharged from the incinerator (1).

Here, the incinerator 1 is made of a refractory wall provided with a grate for burning waste.

In addition, the incinerator 1 is connected to a steam dryer 2 for drying wastewater and sewage sludge.

That is, the steam dryer 2 is connected to the incinerator 1 so that the high temperature exhaust gas discharged from the steam dryer 2 by the wastewater and sewage sludge drying can be burned to the combustion heat generated when the waste is burned in the grate. do.

In addition, the waste heat recovery boiler 1000 has an inlet space 110 into which the high-temperature exhaust gas discharged from the incinerator 1 is introduced, and the first exhaust space 120 from which the exhaust gas is discharged is opposite. Is formed on one side, the moving space 130 is provided with a plurality of partitions 131 to move the exhaust gas from the inlet space 110 to the first discharge space 120 while continuously changing the direction of the inlet space It is formed between the 110 and the first discharge space 120, the cooling chamber 100 for lowering the temperature of the exhaust gas is included.

Here, the wall of the cooling chamber 100 is a steel plate material for sealingly connecting a plurality of tube tubes located at predetermined intervals and a plurality of the tube tube while the water for heat exchange with the hot exhaust gas is circulated therein. Is made of.

In addition, the waste heat recovery boiler 1000 is installed in the cooling chamber 100 so as to be connected to the first discharge space 120, and heats through heat exchange from the high-temperature exhaust gas supplied through the first discharge space 120. It includes a heat recovery chamber 200 is provided with a heat recovery unit 210 for recovering.

Here, the heat recovery unit 210 is installed in the upper steam drum 211 to receive the boiler water, the lower first and second drums 212 installed side by side under the upper steam drum 211 to receive the boiler water 213 and a plurality of first and second heat transfer tubes 214 connecting the upper steam drum 211 and the lower first and second water drums 212 and 213 to both sides of the upper steam drum 211. 215 and a partition heat pipe installed in the maintenance space 216a formed between the plurality of first and second heat transfer pipes 214 and 215 to divide the maintenance space 216a into a zigzag shape. 216, a soot blower 217 installed in the first and second heat pipes 214 and 215 so as to be located in the plurality of divided maintenance spaces 216a, and the lower first and second drums 212. A second discharge space 218 is formed between the (213).

In addition, a plurality of first and second heat transfer tubes 214 and 215 installed on the outer surface of the upper steam drum 211 and the lower first and second water drums 212 and 213 in a longitudinal direction so that boiler water flows up and down. Is an angle between one side of the first and second heat transfer pipes 214 and 215 positioned at the first and the second heat drums 212 and 213, respectively. θ) is formed from 90 ° to 180 °.

Here, one side of the plurality of first and second heat pipes 214 and 215 is formed to face the center of the upper steam drum 211.

In addition, the compartment heat pipe 216 is connected to one of the upper steam drum 211 and the lower first and second water drums 212 and 213.

In addition, the lower first and second water drums 212 and 213 are formed to have a smaller diameter than the upper steam drum 211, and are located at both sides of the upper steam drum 211 in plan.

In addition, the soot blowers 217 respectively positioned in the maintenance space 216a divided into a plurality of surfaces face the plurality of first and second heat transfer tubes 214 and 215, respectively.

In addition, the heat recovery unit 210 includes a water circulation pipe 219 installed between the lower first and second water drums 212 and 213 on both sides of the second discharge space 218.

In addition, the wall of the heat recovery chamber 200 is a steel plate material for sealingly connecting the plurality of tube tubes and the plurality of tube tubes positioned at predetermined intervals while the water for heat exchange with the hot exhaust gas is circulated therein. Is made of.

In addition, the waste heat recovery boiler 1000 includes an exhaust duct 300 installed in the heat recovery chamber 200 to discharge the exhaust gas having a lower temperature while passing through the heat recovery unit 210.

Here, the exhaust duct 300 may include a heat exchange device through which water is circulated to further lower the temperature of the exhaust gas, and the water may be supplied to the heat recovery unit 210 in the form of boiler water.

In addition, the waste heat recovery boiler 1000 is installed to be connected to the cooling chamber 100 and the heat recovery chamber 200 and the discharge duct 300 includes a hopper 400 for collecting dust.

Here, the second discharge space 218 of the heat recovery unit 210 is connected to the hopper unit 400.

Referring to the operation and effects of the present invention configured as described above are as follows.

As shown in Figures 1 to 3, the waste heat recovery boiler 1000 according to an embodiment of the present invention is a high temperature exhaust gas discharged from the incinerator 1 by waste incineration treatment through the inlet space 110. Flows into the chamber 100.

Here, the exhaust gas contains dust.

In addition, the high temperature exhaust gas discharged from the incinerator 1 includes high temperature exhaust gas discharged from the steam dryer 2 by waste water and sewage sludge drying.

Here, the high temperature exhaust gas discharged from the steam dryer (2) is maximally combusted in the incinerator (1) by the heat of combustion generated during waste combustion in the grate.

In addition, the hot exhaust gas introduced into the cooling chamber 100 moves to the first discharge space 120 while continuously changing directions along the plurality of partitions 131 in the moving space 130.

Here, the exhaust gas is to the extent that dust is attached to the first and second heat transfer pipes 214 and 215 of the heat recovery unit 210 through heat exchange with water circulated in the wall of the cooling chamber 100. Will be lowered to.

Thus, the exhaust gas whose temperature is lowered is supplied to the lower portion of the heat recovery chamber 200 through the first discharge space 120.

Here, the relatively heavy dust contained in the exhaust gas is free fall in the cooling chamber 100 is collected in the hopper 400.

In addition, the high temperature exhaust gas supplied to the heat recovery chamber 200 passes through the heat recovery unit 210 in which the boiler water is circulated therein.

Here, the boiler water is circulated in the upper steam drum 211 and the lower first and second water drums 212 and 213 and the first and second heat pipes 214 and 215 and the compartment heat pipe 216.

In addition, since the water circulation pipe 219 is installed at both sides of the second discharge space 218 between the lower first and second water drums 212 and 213, the lower first and second water drums 212. Boiler water is also circulated between the (213) and the boiler water is more easily circulated in the heat recovery unit 210.

The boiler water is heated by heat exchange with hot exhaust gas.

In more detail, the boiler water is distributed to both sides of the upper steam drum 211 through the plurality of first and second heat pipes 214 and 215, respectively, and the lower first and second water drums 212 and 213. It descends toward) and is heated by heat exchange with hot exhaust gas.

Then, the boiler water flows upwardly through the plurality of first and second heat pipes 214 and 215 in the saturated water state toward the upper steam drum 211, respectively, and is continuously heated by high temperature exhaust gas and heat exchange.

Of course, heat exchange is also performed in the compartment heat pipe 216.

The steam generated by the heating of the boiler water is stored together with the boiler water heated in the upper steam drum 211.

Here, the heated boiler water and steam is discharged to the outside is used for industrial, heating, hot water and the like.

On the other hand, the exhaust gas containing the dust is lowered to a temperature that can reduce the adhesion of the dust to the first and second heat transfer pipes (214, 215) of the heat recovery unit 210 through the cooling chamber (100) A part of the dust is attached to the plurality of first and second heat pipes 214 and 215.

Thus, by operating the soot blower 217 facing the first and second heat transfer pipes 214 and 215 in the maintenance space 216a divided into a plurality, steam or air sprayed from the soot blower 217. Separating the dust attached to the plurality of first and second heat pipes (214, 215) through.

Then, the dust is discharged from the second discharge space 218 is collected in the hopper 400.

In addition, an angle θ between one side of the first and second heat transfer pipes 214 and 215 positioned at the first and last positions in the lower first and second drums 212 and 213 is 90 ° or more to 180 °. Since it is formed below, the space | interval between the said 1st, 2nd heat exchanger tubes 214 and 215 is formed wide.

That is, the dust separated through the soot blower 217 is not caught between the plurality of first and second heat pipes 214 and 215.

In addition, the exhaust gas whose temperature is lowered while passing through the heat recovery unit 210 is discharged through the discharge duct 300.

Here, the exhaust gas is further lowered in temperature through heat exchange with water circulated in the wall of the heat recovery chamber 200.

In addition, the relatively heavy dust contained in the exhaust gas is free fall from the discharge duct 300 is collected in the hopper 400.

That is, the exhaust gas from which the temperature is significantly lowered and the dust is significantly reduced is discharged from the exhaust duct 300.

Then, the dust collected in the hopper 400 is discharged to the outside.

Although the present invention has been shown and described with reference to certain preferred embodiments, the present invention is not limited to the above-described embodiments and has ordinary skill in the art to which the present invention pertains without departing from the spirit of the present invention. Various changes and modifications may be made by the user.

100: cooling chamber 110: inlet space
120: first discharge space 130: moving space
131: partition 200: heat recovery room
210: heat recovery section 211: upper steam drum
212: lower first drum 213: lower second drum
214: first heat pipe 215: second heat pipe
216: compartment heat pipe 216a: maintenance space
217: suit blower 218: second discharge space
219: water circulation pipe 300: discharge duct
400: hopper portion 1000: waste heat recovery boiler

Claims (4)

In the waste heat recovery boiler for heating the boiler water by using the hot exhaust gas discharged from the incinerator by waste incineration treatment,
An inflow space 110 into which the high temperature exhaust gas discharged from the incinerator 1 flows is formed on one side, and a first discharge space 120 through which the exhaust gas is discharged is formed on the opposite side, and the exhaust gas is continuously The moving space 130 is provided with a plurality of partitions 131 to move from the inflow space 110 to the first discharge space 120 while changing the direction to the inflow space 110 and the first discharge space 120 The cooling chamber 100 is formed between the and lowers the temperature of the exhaust gas,
Is installed in the cooling chamber 100 to be connected to the first discharge space 120, the heat recovery unit 210 for recovering heat through heat exchange from the high-temperature exhaust gas supplied through the first discharge space 120 is Heat recovery room 200 provided,
An exhaust duct 300 installed in the heat recovery chamber 200 to discharge exhaust gas having a lower temperature while passing through the heat recovery unit 210;
It is installed to be connected to the cooling chamber 100 and the heat recovery chamber 200 and the discharge duct 300, and includes a hopper 400 for collecting dust,
The heat recovery part 210 includes an upper steam drum 211, lower first and second water drums 212 and 213 installed side by side under the upper steam drum 211, and the upper steam drum 211. A plurality of first and second heat pipes 214 and 215 connecting the upper steam drum 211 and the lower first and second water drums 212 and 213 to both sides of the plurality of first and second heat pipes 214 and 215, respectively. A partition heat pipe 216 installed in the maintenance space 216a formed between the heat transfer pipes 214 and 215 and partitioning the maintenance space 216a into a zigzag shape, and the maintenance space partitioned into a plurality of sections. Hopper blowers 217 are formed between the soot blowers 217 installed in the first and second heat transfer pipes 214 and 215 and the lower first and second drums 212 and 213 to be positioned at the 216a, respectively. And a second discharge space 218 connected with 400,
Boiler water circulated in the upper steam drum 211 and the lower first and second water drums 212 and 213 and the first and second heat transfer pipes 214 and 215 and the compartment heat transfer pipe 216 may have a high temperature exhaust gas. Heated through heat exchange, the steam generated by the heating of the boiler water is stored in the upper steam drum 211,
The dust attached to the plurality of first and second heat pipes 214 and 215 is separated through the soot blower 217 and is discharged from the second discharge space 218 to be collected in the hopper 400.
The plurality of first and second heat transfer pipes 214 and 215 installed on the outer surface of the upper steam drum 211 and the lower first and second water drums 212 and 213 in a longitudinal direction so that the boiler water flows up and down, respectively. One side is formed to face the center of the lower first and second drums 212 and 213, and the angle θ between one side of the first and second heat pipes 214 and 215 located at the beginning and the end. The lower drum separation type waste heat recovery boiler is easy to remove dust and characterized in that the dust is formed in more than 90 ° ~ 180 °. delete The method of claim 1,
The heat recovery unit 210 is dust removal, characterized in that it comprises a water circulation pipe 219 is installed between the lower first and second drums (212, 213) on both sides of the second discharge space (218) Waste heat recovery boiler with lower drum separation and easy circulation. The method of claim 1,
The incinerator 1 is connected to a steam dryer (2) for drying the waste water and sewage sludge,
The high temperature exhaust gas discharged from the incinerator 1 includes waste water and high temperature exhaust gas discharged from the steam dryer 2 by sewage sludge drying. Recovery boiler.

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