JPH0126396B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to coke dry extinguishing equipment having a vertical cylindrical cooling tower in which a preliminary chamber, a gas suction port, and a cooling chamber are connected. This has been improved to prevent blockages.

As shown in Fig. 1, a conventional cooling tower of this type has, from top to bottom, a preliminary chamber 1 and a gas suction port 2.
The gas suction port 2 has a small opening width b by a number of partition walls 4 provided at equal intervals around the circumference. It has a gas discharge hole 5 forming a flue, and the gas that has become high temperature by cooling the red-hot coke passes through the gas discharge hole 5 and reaches a circular flue 6, where it is circulated. ing.

When enlarging the cooling tower of coke dry extinguishing equipment, which uses a countercurrent moving bed, the following technical problems arose, and it was difficult to prevent the gas suction zone from being blocked by coke. .

First, as shown in FIG. 1, a gas suction port 2 of a cooling tower in a coke dry fire extinguishing system consists of gas discharge holes 5 forming a large number of small flues with an opening width b. Coke is always deposited in the gas discharge hole 5 at an angle of repose. Note that 7 indicates the surface of the coke in this deposited state. The occurrence of this phenomenon in which the gas exhaust hole 5 is clogged with coke is determined by the behavior of the coke during cutting.

That is, when the coke is cut out, the gas discharge hole 5
The coke layer at the gas inlet of the gas inlet is loosened, and coke flows into the gas discharge hole 5 under the influence of the flow of circulating gas. On the other hand, the coke accumulated in the gas discharge hole 5 is unloaded and escapes into the cooling chamber 3 from the gas inlet of the gas discharge hole 5. If the inflow coke amount Q ₁ is greater than the escape coke amount Q ₂ , the above-mentioned blockage occurs.

In order to prevent this blockage due to coke, it is necessary to ensure a balanced relationship of Q ₂ ≧Q ₁ .
This means that even if Q ₁ is the same amount, if Q ₂ decreases, the relationship Q ₂ ≧ Q ₁ will break down during high-load operation.
This indicates that a blockage phenomenon occurs.

In order to increase the size of the cooling tower, the inner diameter of cooling chamber 3 was increased to 6500 mm.
If each dimension is determined proportionally with relatively small equipment of about millimeter size, the amount of coke flowing in _Q1 will be the same amount, but the amount of coke escaping _Q2 will decrease.
During high-load operation, the relationship Q ₂ ≧ Q ₁ breaks down and blockage occurs.

In other words, when each dimension is determined proportionally to a relatively small equipment in which the inside diameter of the cooling chamber 3 is about 6500 mm, the gas flow velocity v ₀ in Fig. 1 is the same, so the above Q ₁ is the same amount. You can think that. However, the first
The problem is that the dimension l in the figure also increases proportionally. When the dimension l becomes several times the coke particle diameter or more, even when the coke in the cooling tower is unloaded due to cutting, the part that hardly falls down is the gas discharge hole 5.
It occurs deep inside. As a result, the balance of Q ₂ ≧Q ₁ begins to collapse, the coke level in the gas discharge hole 5 gradually rises due to the inflowing coke, and the gas suction zone is eventually blocked.

Therefore, in order to ensure the balance Q ₂ ≧Q ₁ in the gas discharge holes 5 when increasing the size of the cooling tower, the following method can be considered.

First, the area S of the coke surface 7 of the gas discharge hole 5 is made larger than that of a relatively small equipment with an inner diameter of about 6,500 mm in the cooling chamber 3, so that the coke surface that controls the behavior of the coke that enters the cooling chamber 3 is made larger. The gas flow velocity v ₀ (maximum gas flow velocity v' ₀ ) in the section 7 is kept small, and the inflow coke amount Q ₁ (intrusion coke amount) is reduced. Second, if we geometrically increase the dimension W in order to reduce the dimension l while leaving the area S unchanged, that is, if we reduce the inner diameter of the preliminary chamber 1, the volume of the preliminary chamber 1 will become smaller, so Room 1
In order to secure the volume of , the height becomes high, which increases the cost. Therefore, taking these points into consideration, the dimension 1 is set to the minimum to suppress the decrease in the amount of escaping coke Q ₂ .

The present invention reduces the gas flow velocity v ₀ by increasing the area S, thereby reducing the amount Q ₁ of coke flowing into the gas discharge hole 5, and by reducing the dimension l, the coke escapes. Promote the descent of the course, prevent the decrease in Q ₂ , and
The object of the present invention is to provide a cooling tower for a coke dry extinguishing system that can prevent clogging of a gas suction port 2 by coke without increasing costs in order to secure the volume of a preliminary chamber 1.

For this reason, the configuration of the cooling tower of the present invention is characterized in that it includes a protrusion made of a refractory whose inner diameter is smaller than the inner diameter of the preliminary chamber directly above the gas suction port.

An embodiment of the present invention will be described below with reference to FIG.

FIG. 2 shows one embodiment of the present invention, and the symbols 1 to 7 in the figure are the symbols 1 to 7 in FIG.
7 indicates the same or equivalent part. Reference numeral 8 denotes a protrusion made of refractory material, which is provided in an annular shape just above the gas suction port 2, and its inner radius extends to the preliminary chamber 1.
is smaller than the inner radius by Z.

As shown in FIG. 2, by providing a protrusion 8 on the inner side of the lower end of the wall of the preparatory chamber 1 directly above the gas suction port 2, firstly, the surface 7 of the coke is moved away from the inner edge of the dimension Z. Therefore, the coke surface area S can be sufficiently expanded without increasing the dimension W, and since both partition walls 4 of the suction port are not present in the dimension Z portion. Therefore, when the gas flow rate is the same, the gas flow velocity v ₀ in that part becomes smaller. In addition, since the inlet opening m can be completely expanded, the maximum flow velocity, which most governs the behavior of intruding coke, among the gas flow velocity v ₀ .
v' ₀ can be made sufficiently small, and most of the coke inflow distance can be kept within the range of the dimensions Z and W in which coke is sufficiently unloaded. Second
In addition, even if the dimensions G and W and the angles θ ₁ and θ ₂ are the same as in the conventional case, since the dimension 1 is necessarily (geometrically) smaller, there is no part in the 1 part where the load is not unloaded. Therefore, even if coke flows into the l section, the coke level will not rise. Third
In addition, since the amount of deviation (overhang) W between the inner wall of the preliminary chamber 1 and the inner wall of the cooling chamber 3 can be kept small, the inner diameter of the preliminary chamber 1 can be secured large, and as a result, the height of the entire cooling tower can be reduced. It can be lowered.

As described above, since the present invention includes the protrusion 8 whose inner diameter is smaller than the inner diameter of the preliminary chamber 1 directly above the gas suction port 2, the behavior of coke can be controlled without reducing the diameter of the preliminary chamber 1. Dominant gas flow velocity v ₀
(maximum gas sulfur velocity v′ ₀ ) can be kept small, the amount of coke Q ₁ flowing into the gas outlet 5 can be reduced, and the inflow distance can be shortened. Also, by increasing the size of the cooling tower, the gas outlet Even if 5 is enlarged, as described in the above embodiment, the above dimension l
Since this can be kept small, there will be no part in the L section where it is difficult to unload coke. Therefore, the cost for securing the volume of the preliminary chamber 1 is not increased, and the gas suction port 2 can be prevented from being clogged with coke. Furthermore, since the protrusion 8 is made of refractory material, burnout can be avoided.

[Brief explanation of drawings]

Figure 1 is a cross-sectional elevation view showing a part of a cooling tower in a conventional coke dry fire extinguishing system, and Figure 2 is a
1 is a cross-sectional elevational view of an embodiment of the invention shown in correspondence with the figures; FIG. 1...Preliminary room, 2...Gas suction port, 3...Cooling room, 4...Partition wall, 5...Gas discharge hole, 6...Circular flue, 7...Coke surface, 8... protrusion.

Claims (1)

[Claims] 1. In a coke dry fire extinguishing system having a vertical cylindrical cooling tower in which a preliminary chamber, a gas suction port, and a cooling chamber are connected in order from top to bottom, the inner diameter of the portion directly above the gas suction port is A coke dry extinguishing system characterized by having a refractory protrusion that is smaller than the inner diameter of the chamber.