JPH05737U - Coke dry fire extinguisher cooling tower gas outlet free - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the amount of powder and granules that accompany the inert gas stream discharged from the exhaust port of the coke dry digestion equipment. [Structure] A plurality of groove portions are formed in an exhaust port and a lower furnace wall, each of which is composed of a void and a small passage extending in a flow path direction of an inert gas flow passing through the exhaust port. [Effect] Due to the formation of the groove portion, uneven flow in the exhaust port is prevented, and the number of powder particles associated with the inert gas flow is reduced. As a result, stable operation is possible even when the amount of the inert gas flow is increased due to the enlargement of the facility and the increase in the existing capacity.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention uses heat exchange with red hot coke in the cooling tower of a coke dry digestion facility. When the hot gas is sent to a heat exchanger such as a boiler, it is accompanied by the discharge of the gas. Gas outlet flue with less powder and granules.

[0002]

[Prior art]

  While collecting the sensible heat of the red hot coke extruded from the coke oven, the red hot coke Preheated red hot coke batch-charged into the cooling tower to cool the gas. Once stored in the chamber, it is continuously dropped from this pre-chamber into the cooling zone. Coke dry digestion equipment is known.

[0003]   FIG. 11 shows a coke dry digestion facility equipped with this sensible heat recovery system.

[0004]   Red hot coke from the coke oven is fed from the inlet 2 provided at the top of the cooling tower body 1. It is put into the pre-chamber 3. Then, it successively drops into the lower cooling chamber 4 and blows gas. It is cooled to about 200 degrees by heat exchange with the inert gas blown from the mouth 5. Be done. The cooled coke is cut out from the discharge port 6 by the cutting device 7. It On the other hand, the inert gas whose temperature has been raised to about 800 degrees by heat exchange is discharged from the exhaust port 8 It is guided to the boiler 11 via the duct 10. Is there an inflow pipe 12 in the boiler 11? Water is supplied from the duct 10, and this water holds the inert gas sent from the duct 10. It absorbs heat and becomes hot water or steam, which is taken out from the outflow pipe 13.

[0005]   In recent years, this coke dry digestion facility has been able to increase the amount of heat recovered per unit investment. As a purpose, the equipment tends to be larger.

[0006]   However, the increase in size of this equipment creates a new blockage due to the blockage of coke in the exhaust port 8. Causing the problem.

[0007]   In other words, the amount of red hot coke thrown into the cooling tower body 1 increases due to the increase in the size of the equipment. However, the amount of blown gas required to cool this is higher than the rate of increase in the amount of coke input. Need a lot of waste. On the other hand, the exhaust port 8 has a brick structure and Due to the restrictions imposed by the construction of the furnace, it cannot be made larger than a certain size.

[0008]   In addition, increasing the size of the exhaust port 8 increases the thickness of the coke deposit that enters the exhaust port 8. Increase the drift of the inert gas flow in the exhaust port 8.

[0009]   That is, in the vicinity of the upper furnace wall 17, the coke deposition thickness is thin, and the inert gas flow flows. However, the coke deposit is thick near the lower furnace wall 19 and it is difficult for the inert gas flow to flow. And the gas concentrates and flows near the upper furnace wall 17.

[0010]   Therefore, an increase in the size of the equipment causes an increase in the flow velocity of the inert gas in the exhaust port 8 and uneven flow. , The coke lumps and powder particles that accompany the inert gas flow are increased, and thus the exhaust port 8 Cause blockage due to coke lumps and powder particles.

[0011]   To reduce the amount of coke lumps and powder particles that accompany this inert gas flow As shown in FIG. 14, the exhaust port may be partitioned in multiple stages by a plurality or a single partition wall 22. Are described in Japanese Utility Model Publication No. 62-15222.

[0012]   With this partition wall 22, the coke lumps 20 in the exhaust port 8 are separated from each other by the partition wall 2 It has a surface 20a above 2 and a surface 20b below. Stack of this coke chunk 20 Comparing the accumulated state with the case of FIG. 13, the coke seen in the flow direction of the inert gas flow 21. The deposition thickness of the lump 20 is about half. Therefore, it is separated from directly under the upper furnace wall 17 Between the partition wall 22 and directly above the partition wall 22, and between the partition wall 22 and the lower partition wall 19 The difference in ventilation resistance is small, and an inert gas flow is provided just below the upper furnace wall 17 and just below the partition wall 22. The tendency of 21 to concentrate is also suppressed. As a result, the inert gas flow 21 blows off the air. The coke lumps 20 and the powder particles that are blown out also become smaller.

[0013]

[Problems to be solved by the device]

  However, in the conventional exhaust port described above, the partition wall 22 is, for example, a side surface of the columnar portion 18. It is provided as protruding from. Therefore, it is specially manufactured as the columnar portion 18. Deformed brick is required, and it is not easy to attach it to existing equipment.

[0014]   Further, since one partition wall is supported by the two columnar portions 18 adjacent to each other, If the part 18 moves independently due to thermal expansion or the like, the partition wall 22 may be cracked or damaged. It If this is repeated many times due to temperature fluctuations due to operational fluctuations, the partition wall 22 will be removed. It can even be dropped.

[0015]   Further, as shown in FIG. 10, coke powder particles are accumulated in the vicinity of the lower furnace wall 19, but The conventional exhaust port 8 does not have a mechanism for discharging it. Therefore, near the lower furnace wall The porosity decreases and the amount of inert gas that can pass through the exhaust port does not increase significantly.

[0016]   In order to solve these problems, as shown in FIGS. 2 and 12, the exhaust port 8 Japanese Patent Application for forming groove 23 by arranging railroad bricks 25 on the lower furnace wall 19 It is described in Japanese Patent Publication No. 1-161237.

[0017]   This groove portion 23 discharges coke powder particles accumulated on the surface of the lower furnace wall 19 into the cooling cylinder chamber. Since it has a mechanism for making it possible to suppress the decrease in the porosity in the vicinity of the lower furnace wall 19, The groove 23 can also be used as a gas passage. Therefore, it passes through the upper furnace wall 17 side. The flow rate of the inert gas flow decreases, and the inert gas concentrates and flows just below the upper furnace wall 17. And the entrainment of coke lumps and powder particles is suppressed.

[0018]   However, as shown in FIG. 12, the railroad brick 25 forming the groove portion 23 is It is supported only at the site of 25b, and is unstable as a structure. For this reason, If bricks move due to temperature fluctuations due to operational fluctuations, they may be damaged or fall off. Even there.

[0019]   Therefore, the present invention aims to stabilize the structure of the bricks forming the groove and The groove portion 23 for leading out the coke powder particles accumulated on the wall 19 is formed, and the brick portion of the groove portion is piled up. It strengthens the structure and suppresses the coke lump powder particles that accompany the inert gas flow. The porpose is to do.

[0020]   Further, in the conventional groove 23, the small passage 26b connecting the exhaust port 8 and the gap 26a is inactive. It is arranged in equilibrium with the flow direction of the characteristic gas flow. Therefore, the coke powder 31 empty The drop amount into the gap 26a is small, and the decrease in the porosity near the lower furnace wall 19 is suppressed very much. There was a problem that I could not come.

[0021]   The present invention further suppresses the decrease in porosity near the lower furnace wall 19 and passes through the exhaust port. Prevents the flow of inert gas from locally concentrating on the upper furnace wall side and prevents coke lumps. The purpose is to suppress entrainment of powder and particles.

[0022]

[Means for Solving the Problems]

  In the present invention, an exhaust duct that connects the inside of the furnace to an annular duct provided around the cooling tower is installed in the lower furnace. Before it hits at least the inlet side of the exhaust port, divided by the wall, upper furnace wall and column The lower furnace wall side, a plurality of extending in the flow path direction of the inert gas flow passing through the exhaust port. In the cooling tower gas outlet flue of the coke dry digestion facility having the groove, The groove is composed of a gap, a small passage connecting the exhaust port and the gap, and the small passage is formed with an inert gas. Installed intermittently in the flow direction of the gas, or set the small passages in the inert gas flow direction. Gas outflow of the cooling tower of the coke dry digestion equipment, which is characterized by being placed at a right angle to the direction It is a mouth flue.

[0023]

[Action]

  A groove part consisting of a void in the lower furnace wall of the exhaust port and a small passage connecting the exhaust port and the void Coke powder can pass through the width of the small passage, but coke lumps cannot pass. If not, the coke lumps deposited on the wall of the lower furnace will not fall into the voids, but Cous powder drops into the void through a small passage. Therefore, the porosity of the lower furnace wall is The decrease is suppressed, and the inert gas flow flowing up the cooling tower and flowing to the exhaust port becomes easier to flow. It If the small passages are arranged intermittently in the flow direction of the inert gas, the grooves will be The bricks to be formed will be supported by the upper and lower surfaces, which will stabilize the brick structure. It

[0024]   Furthermore, the coke that descends through the small passage and the exhaust port is placed at a right angle to the descending direction. If you place it, the range in which the coke powder particles can fall into the voids is expanded, and more coke The powder particles can be discharged to the cooling tower, and the decrease in the porosity near the lower furnace wall can be further suppressed.

[0025]

【Example】

  Hereinafter, the features of the present invention will be described in detail with reference to the accompanying drawings.   1 and 2 show that a railroad brick 25 is provided on the lower furnace wall 19 forming a part of the exhaust port 8. An example in which the grooves 23 are formed by arranging the above will be shown. In addition, in FIG. The same reference numerals are used to indicate the corresponding members, etc. 11 appropriately use the reference numerals in FIGS. 11 and 14.

[0026]   The outlet flue of this embodiment is similar to the case of FIG. 14 in that the upper furnace wall 17 and the lower furnace wall 1 The columnar portion 18 is disposed between the columnar portion 9 and the columnar portion 9 to form the exhaust port 8. The column 18 is shown in FIG. 1, a plurality of columns are provided along the inner peripheral surface of the cooling tower body 1 An exhaust port 8 is provided between the portions 18.

[0027]   As shown in FIG. 3, the inner wall surface of the lower furnace wall 19 that forms the lower surface of the exhaust port 8 is A number of grooves 23 are provided along the passage direction of the inert gas flow 21. these The groove portion 23 is formed from the gap 26a, the exhaust port 8 and the small passage 26b connecting the gap 26a. Has been formed. The width of the small passage 26b is such that although individual powder particles can pass through, A mass cannot pass through.

[0028]   For this reason, the coke powder particles accumulated in the vicinity of the lower furnace wall 19 of the exhaust port 8 are small passages. 26b to the gap 26a, descending through the gap 26a, and discharged to the cooling chamber 4. Will be issued. In addition, in the gap 26a, the coke powder particles that have fallen are smoothly discharged to the cooling chamber 4. The angle of inclination is set to be larger than the angle of repose of the coke. Has been. And, the coke powder particles in the vicinity of the lower furnace wall decrease and the decrease in porosity is suppressed. To be done. Further, the void 26a not only discharges the falling coke powder particles, , Is also utilized as a flow path for an inert gas flow that rises in the cooling chamber 4 and flows to the exhaust port 8. .

[0029]   As a result, the inert gas flow 21 rising from below the cooling chamber 4 flows to the exhaust port 8. When entering, the tendency to concentrate on the upper furnace wall 17 side is suppressed and the inert gas flow 21 The accompanying coke lumps and powder particles are reduced.

[0030]   As described above, the gap 26a of the groove 23 formed in the lower furnace wall 19 is the core of the dropped coat. Since the powder particles 31 are discharged to the cooling chamber 4 or serve as a flow path for the inert gas flow 21, The larger the size, the better.

[0031]   In addition, the small passages 26b contain the coke powder particles 31 accumulated near the lower furnace wall 19 as described above. Exhaust the inert gas flow 21 that drops into the gap 26a or rises above the gap 26a. Used to squirt into mouth 8. The width of this small passage 26b is such that the coke mass is small. The largest dimension that does not enter passageway 26b is preferred. Average grain of coke lump 20 in general Since the diameter is about 50 to 80 mm, the size of the small passage 26b is such that coke lumps do not descend. The optimum length is 5 to 50 mm, preferably about 20 mm.

[0032]   In order to improve the strength of the structure of the brick forming the groove portion 23, the small passage 26b is As shown in FIG. 3, it is not arranged on the entire surface of the gap 26a, but should be arranged intermittently. It By doing so, the upper surfaces of the bricks forming the groove portion 23 are adjacent to each other. The bricks on the groove can be fixed on the upper and lower surfaces. As a result, operational changes Even if the temperature fluctuates due to movement, the groove brick is firmly fixed, and damage or Almost no dropouts occur.

[0033]   Further, in the above-described embodiment, the groove portion 23 is formed by arranging the railroad bricks 25. As described above, the groove 23 is provided with a brick having a shape as shown in FIG. It may be formed by any method, and the shape thereof is not particularly limited.

[0034]   FIG. 5 is an example showing a lower structure of the void 26 a of the groove 23. Inside the lower furnace wall 19 Even if the groove 23 is formed on the wall surface, if the structure below is not suitable, the groove 23 is It is blocked by the powder particles 31. When this happens, the coke powder will be discharged, as well as being inactive. It cannot be used as a flow path for the gas flow 21. Therefore, the lower structure of the groove 23 is It is particularly important in forming the groove 23.

In the figure, in order to smoothly discharge the fallen coke powder particles into the cooling chamber 4, both inner wall surfaces θ ₁ and θ ₂ of the lower portion of the groove 23 are equal to or greater than the repose angle of the coke, and the lower inner wall surface θ ₁ is set to be larger than the upper inner wall surface angle θ ₂ . Further, the diameter of the lower end of the ceiling wall 32 forming the groove 23 is smaller than the diameter of the cooling chamber 4, that is, the dimension a in FIG. The discharge resistance to the cooling chamber 4 is reduced.

[0036]   As a result, the coke powder particles 31 that have fallen into the voids 26a of the groove portion 23 are It smoothly discharges to the cooling chamber 4 without stagnation. Therefore, in the gap 26a Will not be blocked by the coke powder particles and will rise from below the cooling chamber 4. When a part of the incoming inert gas flow 21 passes through the groove 23, it can pass smoothly. You can

[0037]   6 and 7 show a small passage 26b connecting the exhaust port 8 and the gap 26a. As shown in FIG. 5, another inert gas flow 21 is placed at a right angle to the gas flow direction. This is an example.

[0038]   By doing so, the coke powder particles 31 accumulated in the vicinity of the lower furnace wall 19 become When descending along the inclined wall of 19, the falling range of coke powder particles is wide, The amount of the coke powder particles 31 falling from the small passage 26b into the void 26a increases.

[0039]   Therefore, more coke powder particles accumulated near the lower furnace wall 19 are discharged to the cooling chamber 4. It is possible to suppress the decrease in porosity. In addition, groove brick Are adjacent to each other on the upper and lower surfaces, which makes them a strong brick structure. It is solid.

[0040]   FIG. 9 shows that the width 26 mm of the gap 26a extends along the passage direction of the inert gas flow 21. , A depth of 100 mm, and a groove 23 having a width of 20 mm of the small passage 29b is formed on an inclined surface. Inert gas that passes through the exhaust port 8 when the lower surface of the exhaust port 8 is formed by the furnace wall 19 It is a graph showing the flow rate distribution of the flow 21.

[0041]   As is apparent from FIG. 9, it was formed between the lower furnace wall 19 and the coke mass 20. The inert gas flow 21 preferentially passes through the void 26a, and further, near the lower furnace wall 19 Of the inert gas flow 21 flowing on the upper furnace wall 17 side because the decrease in the porosity of The flow rate is reduced and the flow rate distribution is averaged over the cross section of the exhaust port 8. for that reason In the vicinity of the upper furnace wall 17, the coke lump 20 should not be entrained in the inert gas flow 21. Become

[0042]   On the other hand, in the conventional exhaust port 8 described with reference to FIG. As the pressure loss differs in the exhaust port 8 cross section due to the decrease in porosity, The flow rate on the side of the upper furnace wall 17 is extremely large. The place where this flow is large, That is, in the vicinity of the upper furnace wall 17, the coke lump 20 is accompanied by the inert gas flow 21, and Sent to.

[0043]

[Effect of device]

  As described above, in the present invention, the lower furnace wall side forming the exhaust port lower surface A groove is formed on the bottom of the furnace wall between the coke block that has entered the exhaust port and the inlet side. A small passage that connects the air gap, the exhaust port, and the air gap is formed.

[0044]   This groove allows the coke powder particles deposited on the lower furnace wall slope to flow from the exhaust port to the cooling chamber. It is led out to suppress the decrease in the porosity of this part, and the gas flow path for the inert gas flow. It also becomes.

[0045]   As a result, the flow rate of the inert gas flow passing through the furnace wall side decreases and Inert gas is not concentrated underneath and does not flow at high speed, and coke lumps and powder particles accompany it. Suppressed. As a result, the coke dry digestion equipment will be enlarged and existing capacity will be increased. As a result, even if the amount of inert gas blown in is increased, Trouble caused by lumps and powder particles can be avoided and stable operation can be performed Becomes

[Brief description of drawings]

FIG. 1 is a perspective view showing an outlet flue according to an embodiment of the present invention.

FIG. 2 is a sectional view showing an outlet flue.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is an application example in which the groove shape of the present invention is changed.

FIG. 5 is a detailed view showing the lower groove structure of the embodiment of the present invention.

FIG. 6 is another embodiment showing the structure of the groove.

FIG. 7 is another embodiment showing the structure of the groove.

FIG. 8 is a sectional view showing an arrangement of small passages.

FIG. 9 is a graph specifically showing the effect of the present invention.

FIG. 10 is a schematic view showing a scattering state of coke powder particles.

FIG. 11 is a schematic diagram showing the overall structure of a coke dry digestion facility.

FIG. 12 is a sectional view showing a conventional outlet flue.

FIG. 13 is a sectional view showing a conventional outlet flue.

FIG. 14 is a sectional view showing a conventional outlet flue.

[Explanation of symbols]

1 Cooling tower body 4 cooling room 8 exhaust port 9 annular duct 17 Upper furnace wall 18 Column 19 Lower furnace wall 20 coke chunks 21 Inert gas flow 23 Groove 25 Railroad brick 26a void 26b small passage

Claims (2)

[Scope of utility model registration request] 1. An exhaust port for connecting the inside of a furnace to an annular duct provided around a cooling tower is divided into a lower furnace wall, an upper furnace wall and a columnar portion, and the lower furnace wall corresponding to at least an inlet side portion of the exhaust port. On the side, in a cooling tower gas outlet flue of a coke dry digestion facility in which a plurality of grooves extending in the flow path direction of an inert gas flow passing through the exhaust port are formed, the groove part is a small part that connects the void to the exhaust port and the void. A cooling tower gas outlet flue for coke dry digestion equipment, characterized in that it is constituted by passages, and the small passages are installed intermittently in the flow direction of the inert gas. 2. An exhaust port connecting the inside of the furnace to an annular duct provided around the cooling tower is divided into a lower furnace wall, an upper furnace wall and a columnar portion, and the lower furnace wall corresponding to at least an inlet side portion of the exhaust port. On the side, in a cooling tower gas outlet flue of a coke dry digestion facility in which a plurality of grooves extending in the flow path direction of an inert gas flow passing through the exhaust port are formed, the groove part is a small part that connects the void to the exhaust port and the void. A gas outlet flue for a cooling tower of a coke dry digestion facility, characterized in that it is constituted by passages, and the small passages are arranged substantially at right angles to the flow direction of the inert gas.