JP2001215011A - Flue equipment of incineration facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce as much as possible white smoke generated by steam exhausted from the water jacket of equipment included in an incinerating facility in the incinerating facility. SOLUTION: Water droplets contained in the steam exhausted from the water jacket is vaporized by heating with high temperature air exhausted from an air path by arranging the air cooler of flue gas in a flue gas duct communicating with an incinerator and a heat exchanging means between the air path of air which is the cooled flue gas arranged to the air cooler and a steam path connecting between the water jacket of the incinerator and the air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flue facility for an incineration facility, and more particularly to an apparatus for heating water vapor generated from a water cooling facility such as a furnace or a flue.

[0002]

2. Description of the Related Art Conventionally, a water jacket is provided for a water-cooled flue gas cooler provided in a furnace body of an incinerator or a flue connected to the furnace body in order to use water as a refrigerant. In addition, the water vapor generated in the water jacket does not come into contact with the exhaust gas from the incinerator and does not contain any pollutant components, and thus is discharged to the atmosphere through a steam chimney. However, the water vapor released into the atmosphere looks dark when the sky is dark, such as when it is cloudy or at dusk, giving the impression that smoke is coming out of the incinerator. May cause anxiety that smoke is coming out of the water. Such problems can be solved by conventional techniques, such as a method of cooling water vapor to condense water droplet components in the water vapor and remove it as water,
It is known that this can be solved by further heating the steam to completely evaporate the water droplets in the water vapor so that the water vapor is not reduced back to water droplets.

[0003]

However, in the former case, a large cooling means is required to uniformly cool and condense a large amount of released steam. In the latter case, a large amount of heat source is required to heat a large amount of water vapor to remove water droplets by heating the water vapor, resulting in a large energy loss. Furthermore, these devices are large in shape because they process a large amount of gas, and cause inconveniences such as an increase in the size of incineration facilities and an increase in construction costs.

[0004]

An object of the present invention is to provide an incineration facility having a steam passage for opening the inside of a water jacket of equipment constituting the incineration facility to the atmosphere and a flue for opening the combustion chamber of the incinerator to the atmosphere. A flue gas cooler is provided in the flue, and an air passage for cooling a flue gas duct forming a part of the flue is provided in the air cooler, and between the air passage and the steam passage. The problem is solved by providing a heat exchange means. In this case, it is preferable that the heat exchange means is constituted by a steam passage and an outlet of an air passage which are connected to each other.

[0005]

The steam discharged from the water jacket of the equipment constituting the incineration facility receives high-temperature heat exceeding 100 ° C. from the heated air discharged from the air cooler and is contained therein. Since the water droplets completely evaporate, the water vapor is released into the atmosphere without the water droplets. (Claim 2) In the steam passage formed as the heat exchange means, the steam flowing therethrough and the high-temperature air introduced from the air passage are mixed uniformly and quickly, and the water droplets in the steam are completely evaporated. Let it.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. In the figure, reference numeral 10 denotes an incineration facility utilizing the present invention. The incineration facility 10 is a water-cooled type flue gas cooler 2 connected to an incinerator 11 and a combustion chamber 12 of the incinerator 11 via a flue 15.
0, air-cooled flue gas cooler 30, and bag filter 4
0 and other devices. The downstream side of the bag filter 40 is connected to an exhaust chimney 50 via a smoke exhaust blower 16.
Reference numeral 17 denotes a lime tank, which is provided to contain lime mixed in flue gas flowing into the bag filter 40. The lime mixed in the flue gas flowing into the bag filter 40 adheres to the filtration surface of the bag filter 40 and removes dust efficiently.

Therefore, the flue gas discharged from the incinerator 11 is greatly cooled by the water-cooled flue gas cooler 20 to reduce its capacity, and fine temperature control is performed by the succeeding flue gas cooler 30. As a result, the flue gas falls to a temperature suitable for subsequent operation of the bag filter 40. The dust contained in the smoke exhaust is removed by the bag filter 40, and is discharged from the exhaust chimney 50 to the atmosphere by the action of the smoke exhaust blower 16.

The incinerator 11 has a combustion chamber 12 covered by a water jacket 13 for cooling the furnace body. The inside of the water jacket 13 communicates with the atmosphere through a steam duct 14, and releases water vapor of about 100 ° C. generated by boiling of the water in the water jacket 13 to the atmosphere.

The water-cooled flue gas cooler 20 is composed of a water jacket 22 constituted by a circular pipe 21 erected vertically.
Having. In the water jacket 22, the flue 15
Is provided, and a so-called flue-tube type heat exchanger is formed. 24 is a water jacket 22
This is a steam duct for discharging the steam generated in the above to the atmosphere. The flue gas cooler 20 cools the high-temperature flue gas exceeding 1000 ° C. discharged from the incinerator 11 with water to about 500 ° C.
It becomes water vapor at 0 ° C.
From the steam duct 24.

The air-cooled smoke exhaust cooler 30 is composed of a vertically arranged drum 31 in which an air passage 32 is formed which is connected to the downstream side of the cooling blower 18 and flows upward from below. . A smoke pipe 33 forming a part of the flue 15 is installed in the air passage 32, and heat exchange is performed between smoke exhaust passing through the smoke pipe 33 and air passing outside the smoke pipe 33. Will be The smoke tube 33 is modeled as a polygonal line in the figure, but is actually configured by bundling a large number of relatively thin smoke tubes with some intervals.

Therefore, the smoke exhausted at about 500 ° C. passing through the smoke tube 33 is deprived of heat by the air flowing through the air passage 32 in the drum 31 by the blower 18, and is discharged at about 250 ° C.
Air cooled until On the other hand, the air flowing in the air passage 32 absorbs the heat of the flue gas passing through the smoke tube 32, and
After being heated to the atmosphere.

The downstream ends of the steam ducts 14 and 24 are connected to each other to form a steam passage 19, and are connected to an exhaust chimney 50. In the middle of the steam passage 19, an air passage 32 led from the air-cooled smoke exhaust cooler 30 is provided.
And the downstream end is open to the atmosphere via an exhaust chimney 50.

Approximately 100 flowing through the steam passage 19
C. in the water vapor at about 2 ° C.
The air at 50 ° C. merges and they are rapidly and uniformly mixed in the steam passage 19. As a result, the temperature of the gas mixture of steam and air rises to around 180 ° C,
All the water droplets contained in the water vapor evaporate and change into gas. That is, the steam passage 19 forms a heat exchange means, and uses the heat of the air discharged from the air passage 32 for heating the steam. The water vapor that has been heated by the heat exchange means and has lost water droplets is rapidly cooled to room temperature when released into the atmosphere from the exhaust chimney 50. However, since the water vapor does not contain water droplets that condense again, it becomes white smoke. Will not be visible.

[0014]

According to the first aspect of the present invention, an incineration facility 10 is provided.
The steam discharged from the water jacket of the equipment constituting the device absorbs the heat of the air that has cooled the exhaust gas from the incinerator 11,
Since the water droplets contained therein are vaporized and then released into the atmosphere, there is no generation of white smoke due to the water droplets contained in the water vapor, and the water vapor discharged from the chimney is not mistaken for the flue gas. In addition, since the heat of the flue gas released to the atmosphere is used for heating the steam, the energy is effectively used. According to the invention of claim 2, the water jackets 13, 2
Since the steam flowing through the steam passage 19 connected to the air passage 2 and the high-temperature air introduced from the air passage 32 merge with each other, the heat exchange between the two can be performed efficiently and the structure of the heat exchange means can be simplified. Can be. And so on.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a system diagram showing a configuration of an incineration facility 10. FIG.

[Explanation of symbols]

 10 ... incineration facility 11 ... incinerator 12 ... combustion chamber 13 ... water jacket 14 ... steam duct 15 ... flue 16 ... smoke exhaust blower 17 Lime tank 18 Cooling blower 19 Steam passage 20 Water-cooled flue gas cooler 21 Circular tube 22 Water jacket 23 ..Flue piping 24 .... water vapor duct 30 ..... air-cooled flue gas cooler 31 .... drum 32 ..... air passage 33 .... circular pipe 40 ..... bag Filter 50: exhaust chimney

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Masayuki Ito 1227 Okubocho, Hamamatsu City, Shizuoka Prefecture Inside Muramatsu Fusen Equipment Co., Ltd. (72) Inventor Hikaru Muramatsu 1227 Okubocho, Hamamatsu City, Shizuoka Prefecture Industrial Co., Ltd. F term (reference) 3K070 DA04 DA07 DA32 DA35 DA47

Claims (2)

[Claims] In an incinerator having a steam passage for opening the inside of a water jacket of equipment constituting the incineration facility to the atmosphere and a flue for opening the combustion chamber of the incinerator to the atmosphere, the flue of the flue gas is supplied to the flue. Incineration by providing an air cooler, providing an air passage for cooling a flue gas duct forming a part of a flue in the air cooler, and providing heat exchange means between the air passage and the steam passage. Facility flue equipment. 2. A flue gas system for an incineration plant according to claim 1, wherein said heat exchanging means is constituted by connecting a steam passage and an outlet of an air passage which are connected to each other.