JPH04198048A - Water sprinkler of cooling tower for producing granulated slag - Google Patents

Abstract

PURPOSE:To reduce the amount of sticking substances and cleaning man-hour and facilitate exchange and change of water sprinkling nozzles by arranging a header pipe for circulating water used in producing granulated slag on the outside of a cooling tower and providing the water sprinkling nozzles from the header pipe through branch pipes in the interior of the tower. CONSTITUTION:A header pipe 13 for circulating water is installed at a position below an eliminator 19 of a cooling tower 8 on the outside of a sidewall 17 and branched pipes 14 are passed from the header pipe 13 through openings 18 and faced into the interior of the tower. Water sprinkling nozzles 11 are attached to their tips. The nozzles 11, as necessary, are arranged in the two upper and lower stages to allot the water sprinkling range. Many nozzles 11 are provided at intervals along the sidewall 17. Lid plates are detachably installed in places where the branched pipes 14 are passed through the sidewall 17. The sides on the back end of the branched pipes 14 are connected to the pipe 13 with flanges 15. A corridor 16 is provided around the pipe 13 to carry out cleaning operation, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a water sprinkler system for a cooling tower for cooling circulating water used in granulated water production.

[Prior Art] Granulated water is produced from molten slag of a blast furnace as follows. In FIG. 3, the molten slab discharged from the blast furnace flows through the slag trough and flows down from the discharge end thereof. High-pressure water is sprayed from the blowing box l onto the molten slag that is flowing down.
The molten slag is granulated into granulated slurry and sent to granulated water gutter 2.
flows down and enters stirring tank 3. Water agitation is performed in the agitation tank 3 to form a slurry suitable for pipe transportation. The granulated slurry is pumped into a dehydration tank 4, dehydrated and turned into granulated products, which are periodically pulled out by a transport truck 5 and transported to a granulated granulated storage site. On the other hand, the water separated into solid and liquid in the dehydration tank 4 enters the sedimentation tank 5 where crushed water and the like mixed in the water are sedimented and separated. The supernatant liquid in the sedimentation tank 5 is separated into solids and water in a water supply tank 6, and the supernatant liquid enters the water landing tank 7. Waterborne supernatant liquid (
The high temperature) is sent to the cooling tower 8 by a pump, and after being cooled, it is reused as water for blowing, stirring water in a stirring tank, etc.

Figure 2 shows the structure of the cooling tower.
Enter header 1.0 located inside header 1.
Water is sprayed downward from a number of water spray nozzles 1.1 at the tips of branch pipes attached to the pipe. - On the other hand, outside air 22 is sucked in by the fan 9 at the top of the cooling tower 8 through the outside air intake (louver) 12 on the side of the tower and rises. The descending water droplets 21 of the circulating water come into countercurrent contact with the rising outside air and are cooled. As mentioned above, the circulating water is sprayed from the water spray nozzle 11 of the cooling tower 8 after removing impurities such as crushed water particles mixed in the sedimentation tank. Substances and dissolved substances precipitate in various parts of the tower, causing a decrease in water spraying capacity and an increase in ventilation resistance, resulting in a decrease in cooling capacity and eventually requiring the operation to be shut down. Japanese Unexamined Patent Publication No. 56-120551 was proposed in an attempt to solve the above-mentioned problem, and uses make-up water to the cooling tower as washing water for deposits deposited inside the cooling tower.

[Problems to be Solved by the Invention] The method of cleaning deposits with make-up water is effective to some extent in preventing a decline in cooling capacity, but when used for a long period of time, deposits adhere to the water nozzle and the spraying becomes difficult. As the amount of water decreases, it is necessary to stop the equipment and go inside the tower to remove deposits from the water spray nozzles, etc.

This cleaning work requires setting up scaffolding inside the tower, which is in a poor environment, and takes a long time, so it is dangerous and the cleaning work costs a lot of money.

[Means for Solving the Problems] The present invention aims to solve the above-mentioned problems, and includes a header pipe for circulating water in a water sprinkler system for a cooling tower that cools circulating water used for granulation production. This is a water sprinkling device for a cooling tower for producing granulated water, characterized in that it is disposed outside the cooling tower, and a water sprinkling nozzle is provided inside the side wall of the cooling tower via a branch pipe from a header pipe.

[Function] Since the water spray nozzle can be removed from outside the cooling tower, the water spray nozzle can be safely cleaned outside the tower.

Since there are no headers or their supporting members inside the tower, there is no deposits that would increase ventilation resistance in the past.

[Example] An example of the present invention will be described below based on the drawings. 1st
The figure shows an embodiment of the present invention.

In the figure, a circulating water header 13 is provided outside the side wall 17 of the cooling tower along the side wall at a position below the eliminator 19 of the cooling tower 8 (approximately 15 m from the bottom surface of the eliminator), and a branch pipe 14 is connected from this header. Opening 1 provided in side wall 17
8 to face the inside of the tower, and a water spray nozzle 11 is installed at the tip of the tower.
has been established. In this example, the water spray nozzles 11 are arranged in two stages, upper and lower, and the upper nozzle is assigned the range of the 1/2 line from the center of the tower (line segment A when dividing the tower center to the side wall into two equal parts).
The lower nozzle is assigned to cover the area from the 1/2 line to the side wall. A large number of water spray nozzles 11 are provided at intervals along the side wall. A cover plate (not shown) with a hole through which the branch pipe passes is detachably attached to the location where the branch pipe passes through the side wall. Further, the rear end side of the branch pipe is connected to the header pipe 13 by a joining flange I5 on the outside of the side wall 17. A walkway 16 is provided around the header pipe, so that when deposits adhere to the water nozzle 11,
The cover plate is removed, the branch pipe 14 is separated at the joint flange 15, and the water spray nozzle 11 is taken out of the tower along with the branch pipe to clean the deposits. Furthermore, cleaning can be performed from the walkway side with the cover plate removed and the water spray nozzle 11 left attached. With this configuration, the water nozzle 11 and the branch pipe 14
can now be easily attached and detached.

Table 1 compares the specifications of the apparatus of the present invention and the conventional apparatus for a 4290 m'' blast furnace fracking equipment.

From this table, it can be seen that cleaning costs are significantly reduced and the amount of cooling air required is approximately the same as before.

Table 1 [Effects of the Invention] Since the watering device of the present invention is configured as described above,
The following effects can be obtained.

(1) Since there is no header of the sprinkler system or supporting metal fittings for the header inside the cooling tower, the amount of deposits inside the tower is greatly reduced compared to conventional equipment.

(2) Even if deposits adhere to the water spray nozzles, they can be taken out to the outside of the tower and cleaned, reducing the number of cleaning steps.

(3) When it becomes necessary to improve the cooling capacity, the water spray nozzle can be replaced and the water spray nozzle installation angle can be changed from outside the tower.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a water sprinkling device of the present invention, FIG. 2 is a diagram showing a conventional water sprinkling device, and FIG. 3 is a process diagram for producing granulated water from molten slag of a blast furnace. 8... Cooling tower, 9... Fan, 11... Water nozzle, 12... Outside air intake, 13... Header, 14...
... Branch pipe, 15 ... Flange, 16 ... Corridor, 17
...Side wall, 18...opening.

Claims (1)

[Claims] In a cooling tower sprinkler system that cools circulating water used in granulated water production, a header pipe for circulating water is installed outside the cooling tower, and a water nozzle is connected to the inside of the cooling tower side wall through a branch pipe from the header pipe. A water sprinkler device for a cooling tower for producing granulated water.