JPS5847086A - Method of preheating boiler feed water in cdq installation and structure of main body for cdq - Google Patents

Abstract

PURPOSE:To increase installation efficiency, to reduce dissipation of heat and to decrease installation cost, by equipping a coke dry quencher body whith a cooling jacket which is a supporting structure and passes a cooling medium to the outside wall of a cooling chamber. CONSTITUTION:A high-temp. gas passage 2, being installed in connection with a sloping flue 7 of a coke dry quencher body 1, is equipped on its way with primary dust collector consisting of a dust catching board 9 and a dust cooling conduit 10, and connected to a high-temp. gas inlet 11 of a boiler 3. A gas outlet 12 of the boiler 3 is connected via a circulation gas passage 4 with a cooling gas blowing hole 8 of the coke dry quencher body 1, forming a closed system. Low- temp. water supplied from a water source by a water pump 28 is used as a cooling medium for passing to a cooling jacket 27 and heated water obtd. by heat exchange in the cooling jacket is supplied as boiler feed water to a deaerator 13 mounted on the boiler 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in coke dry extinguishing equipment (hereinafter referred to as CDQ equipment), and more specifically, in CDQ equipment. The present invention relates to a CDQ main body structure that is directly used to perform the in-feed water preheating method and the in-water preheating method O. Generally, the red-hot coke pushed out from the coke oven is cooled down by a wet or dry extinguishing method, but in the dry extinguishing method using a closed system using circulating cooling gas, the hot coke that is pushed out from the coke oven is cooled by a closed-system dry extinguishing method. The improvement in coke quality is achieved by improving heat retention, suppressing the generation of fine lumps, and preventing the generation of dust.
CDQ equipment has become widely popular in recent years due to improved berth conditions and other reasons.

1 Overview of the ICDQ Equipment IIi As shown in Figure 1, the 9 CDQ main body 1 is equipped with a cooling coke and sous discharge device 6 at the bottom.
Primary female) Mm device equipped with 9 high temperature gas flow path 2, water supply deaerator 13 equipped with Gate 3 and secondary female) mercenary III
kI! Equipped with 9 circulating gas channels for supplying low-temperature gas, 4 channels for circulating red hot coke at 1 tC of the CDQ main body.
The system is configured to extinguish the fire by extinguishing the fire, and at the same time operate the Iler 3 continuously using high-temperature gas through O heat exchange.

CDQ main body l is the ninth OJ to put red hot coke and su at the top: I! The input port 5 is connected to a large number of blocks μ-♂ in the direction of the intermediate part.
Natsuri, -7t-, with a nine vertical furnace-like O structure equipped with one circulating cooling gas blowing port 8 at the lower front, the inside of the main body is 4-♂ ring 7 and above the level of -7 -1) If rete yamper. None, and the cooling chamber below this level constitutes the cooling chamber. C1) A lower discharge device 6 for discharging the cooled coke is disposed at the lowest part of the Q main body.

CDQ main unit 10 Slope/double, connect to -7 and high @
An IX flow path 2 is provided, and the flow path 2 is provided with a primary mest collector consisting of a mest collection plate 9 and a dust cooling pipe 1O in the middle thereof, and is connected to the high temperature gas population 11 of the Gate 3. There is one through. The gas outlet 12 of the gear 3 communicates with the cooling gas inlet 8 of the main body 11iD via the circulating gas passage 4, forming one closed system. A normal cyclone 1 is installed as a secondary dust collector in the circulating gas flow path 4.
In addition to the cooling gas t-CDQ main body 1, a lowerer 18 is also provided.

Maku I Ifu 3 is equipped with a deaerator 13 for water supply.
Water is supplied to the air supply pipe 13 from a water supply source by a water supply ponder 16 via a water supply pipe 15, and the water supply aJm air supply pipe 1
The temperature of the air supplied through the 4t tube is heated to near the boiling point to degas the dissolved gas, and the remaining air is continuously supplied to the tube 3.

That’s it II! Dry process of coke in CDQ equipment
4 Hiro, it is performed as follows. In other words, the red-hot coke that is extruded from the coke oven is crawled up to the top of the CDQ main body 10 by a coke packet car (not shown) that is loaded onto a train, and then lifted up by a coke tank crane containing the coke packets and placed on top of the furnace. to the charging device) CDQ
The red-hot coke is charged into the internal chamber of the main body 1 at a rate of, for example, 114) minutes, while the cooled coke is charged almost continuously at intervals of 90 seconds, for example, by the lower discharge device 6. However, as mentioned above!
Red-hot coke must be constantly stored in the rechayper, which is necessary for the operation of Ifu 3.
This is to ensure that 1 does not occur.

The circulating gas for cooling and extinguishing the Akaoh coke is an inert gas whose main component is nitrogen, and the air flow at the inlet 8 is approximately 1
The septic coke held at 80'CK is discharged from the cooling coke and exchanges heat with the circulating 11A gas in the internal chamber of the CDQ main body, especially in the descending funnel in the cooling chamber and paddle. The coke temperature is maintained at approximately 1000C in the cold rechamber, while the discharged coke is cooled to a temperature of approximately z00ct. After heat exchange with the red-hot coke, the 9 gas becomes a high temperature gas of about 500 mm and is discharged to the high temperature gas flow path 2 through the slow pin double -7 in the middle part of the CDQ main body 1.

＾Warm 1x＠ Six bottles included! Strike Ii Kyler Soo
*In order to avoid gas cut-tender to the Ota equipment, it is removed by the primary female F collection plate 9 and the Mest cooling pipe IO. - The primary I-st removed IIO high temperature gas is removed from the hot gas population 11 by the 3. 9. What is the sensible heat that heat exchange takes place here and the circulating gas has? Itsu 3
The gas is converted into steam at
The fine particles are collected (by the cyclone 17 disposed in the dust flow path 4) to secondary dust, and are circulated again to the CDQ main body 1 (by the lowerer 18). In addition, the collection of secondary mest O by the cyclone 17 is carried out at the ninth stage so as not to damage the FA 110m and Il.

The CDQ main body I C) @@ which forms the vertical furnace-like structure in the above CDQ equipment is made of an outer shell iron plate of 20 t-mass in order to have sufficient structural strength as a furnace-like structure, as shown in 2g.
It is composed of A9 refractory brick χ walls 21.

This refractory brick wall 21 consists of three layers: an inner O wear-resistant brick layer 22 that contacts coke, a permanent ordinary brick layer 23, and an insulating brick layer 24 that suppresses the amount of heat dissipated from the main body. As described above, the interior of the CDQ main body consists of the upper @Of rechamber 25 and the lower cooling cylinder chan Δ-26. As it descends in the chamber 26, the temperature rises from a high temperature line of about 1000C to about 200C.
It is cooled by coiljlt. If the thickness of the insulating brick layer 24 is increased in the conventional brick IIS construction of the CDQ main body, the amount of heat dissipated can be suppressed and the dissipated heat loss in the CDQ main body will be eliminated, but equipment costs will rise.

On the other hand, since the cooling cylinder chamber 260 part passes circulating gas for coke cooling, which mainly consists of nitrogen gas, even if the refractory bricks 11121 of the cooling chamber 26 are cooled by the cooling medium, it is difficult to operate the CDQ equipment. This has almost no effect on stability, but on the other hand, as mentioned above, a deaeration tank is attached to the larder of the CDQ equipment, which uses a large amount of superheated steam to deaeration the water from the Ishi tank. The invention is based on the above-mentioned knowledge and CDQ facility operation. 71, a cooling mantle was installed on the CDQ main body that also served as a support structure on the outer wall of the cooling damper and allowed the cooling medium to pass through, and the heat exchanged between the sold cooling medium and the 1) In a CDQ equipment characterized by preheating the water supply, the CDQ main body uses the OK'tL line to implement the water supply heating method. The present invention provides a CDQ main body structure characterized by providing a cooling jacket which also serves as an IC support structure and through which a cooling medium passes.

3- and 4 are partially cut-away cross-sections of the outside of the cooling chamber Ii of the CDQ main body Shozo in the present invention, and show jl! Figure 3 shows a case in which a normal brick layer 2s and a wear-resistant brick layer 22t are provided on the inside of the cooling jacket 27, and the conventional O insulation brick layer 24 is omitted, and Figure 4 shows the inside of the cooling jacket 27. Nine cases are shown in which only the wear-resistant brick layer 22 is provided, and this is Plum O.

In both of these cases, there was no cooling! 127a (g) It also serves as a support structure *1 for the main body structure, and a refrigerant such as water or gas is passed inside it in the direction of the arrow shown in the figure. In addition, the coke temperature near the bottom of the CDQ body is similar! ! The wear-resistant brick layer can also be omitted.

The irises SAP and No. ** are according to the present invention, but the water supply method O11 is clearly shown, and the rattan figure 5 is a cooling method using low-temperature water supplied from the water supply via the water supply ponder 2st as a cold water supply through the cooling jacket 27. The heated water obtained by heat exchange at @27 is
To the deaeration attached to Ilar 3 @18? It shows the method of supplying water to the tank.
This method uses a circulating gas containing nitrogen as a main component to pass through the water, and the circulating gas is forcibly circulated through the circulation path 29.31 and by the f-lower 30. A container 33 is provided. On the other hand, the low-temperature water from the water supply source is 32Vc and the water supply temperature is 32Vc! 33
It exchanges heat with the circulating gas and becomes heated water, which is then degassed via the water supply pipe 34! ! 13 is supplied as an irrigating water supply. , As is clear from the above C)m@, in the present invention, the heat wastefully dissipated from the cooling chamber outer wall of the CDQ main body is effectively recovered, and the recovered heat is used to preheat the water supply to the cooler. This can reduce the amount of superheated steam used in the degassing tank and contribute to improving equipment efficiency. Since it is configured as a cooling jacket that also serves as a cooling jacket, it has the effect of reducing 0IIk radiation from the CDQ body and also contributing to a reduction in equipment gR.

[Brief explanation of drawings]

Schematic explanatory diagram of No. 11Q Company CDQ equipment O, Figure 2 is conventional
Figures 3 and 4 are partially broken box views showing the outer wall structure of the CDQ main body according to the present invention, and Figures gsa and lI6 are from this book. FIG. 2 is an explanatory diagram of a CDQ facility showing an embodiment of invention O. 1.-CDQ main body, 2...high temperature gas flow path, 3.
- is if, 4... gas circulation flow path, S- upper inlet, 6... lower discharge device, earth roving free &% 8'' cooling gas inlet, 9- mest storage plate, 10-.・Dust cooling pipe, 117 high temperature gas inlet, 12... circulating gas outlet, 13-@blunt instrument,
14... Steam supply pipe, 1 B-i/11 water pipe,
16-...Water pump! , 17-? Ikron, 1
8-Blower-120-Outer steel plate, 21--Firebrick wall, 22-Abrasion-resistant brick layer, 23--Normal brick layer, 2
4-Insulating brick layer, 25-f Lechanoguichi 12-
Cooling Channo Paar-1 27-Cooling Mantle, 28...-Water Supply In 1129-
Circulation route, , 30-... Zorower, Figure 3, Figure 411

Claims (1)

[Claims] I CDQ is configured as a closed system consisting of a CDQ main body, a high-temperature gas flow path, a water supply deaerator, and a circulation gas flow path for low-temperature gas supply. A part or all of the outer wall of the cooling chamber of the CDQ main body is configured as a cooling jacket that also serves as a support structure and allows a cooling medium to pass through, and water is supplied to the above-mentioned pots using the recovered heat obtained by heat exchange with the cooling medium. In a CDQ facility characterized by preheating? IN - Feed water preheating method. 2. The cooling body is heated with low temperature water supplied from a water supply source.
A patent characterized in that heated water obtained by heat exchange in the cooling jacket is supplied to the water supply deaerator.
IM IF error in the CDQ equipment described in paragraph 1. 3. The cooling body circulates 11 cooling gas, and the scissors cooling gas O circulates! A water supply preheater is installed in one circuit, and the heated water obtained by heat exchange in the wrinkle water supply water heater is supplied to the water supply deaeration unit 0C
Neuller water heater method in DQ equipment. 4 Il-shaped furnace-like O brick wall structure, upper inlet for charging red-hot coke, throbbing 7 in the body for circulating coke cooling gas, -1 for introducing cooling gas The outer bell of the cooling chamber, which is equipped with a lower inlet and a lower discharge device for discharging the cooled coke, is located at the lower part of the CDQ main body, and also serves as a support structure and supplies a cooling medium. C is characterized by having a cooling jacket that allows it to pass through.
DQ body structure. 5III Slow Cng7su, -yo] Creenda in the lower part! - The amount of brick wall that forms the outer wall of the unit llt The cooling wall that also serves as a support structure and that allows cooling medium to pass through 1IIK of the patent claim characterized in that it has been changed from fm box g 4 IXK description t
)CDQ body 1111itt. 6 The inside of the brick wall forming the outside of the cooling chamber in the lower part of the sloping 7.
0CDQ main body structure as described in item 4 of the scope of the special iFf request for t% mold. 7 wi Note 4: The cooling medium is a circulating cooling gas.
111. The CDQ main body structure according to claim 4. 8. CDQ according to item 4 of the scope of claim 1FPii1, characterized in that the cooling medium is water for gaylor water supply.
Body structure.