JPS5928175Y2 - Spray device for exhaust gas temperature reduction - Google Patents

Description

[Detailed description of the invention] This invention relates to a spray device that sprays high-pressure water into the exhaust gas passage in order to lower the temperature of the exhaust gas. The present invention relates to a spray device for cooling exhaust gas that is configured to enable rapid detection.

A spray device that sprays high-pressure water into an exhaust gas passage is used as a means for cooling high-temperature combustion gas generated from large-scale municipal waste incinerators and the like.

For example, FIG. 1 shows an example of a temperature-reducing spray device installed so as to face an exhaust gas passage of an incinerator, and the exhaust gas passage 1 is constituted by a wall 2 made of brick.

The temperature reducing spray device is constructed by disposing a plurality of spray nozzle bodies 4 on the ceiling of the wall 2 or on the side wall as shown in the figure, but these nozzle bodies 4 penetrate the wall 2. They are attached to each insertion hole 3 formed in such a manner as to be connected to a high-pressure water vibro via an automatic opening/closing valve device 5, respectively.

The nozzle 4a provided at the tip of the nozzle body 4 always protrudes into the gas passage 1, as shown in FIG. 2, and is fixed so as to diffuse water into the gas in a spray state.

The nozzle body 4 has a flange 3 formed on the outer surface of the insertion hole 3.
It is fixed to the wall 2 by a.

By the way, in such a spray device, the nozzle 4a always protrudes into the gas passage 1 and is exposed to the exhaust gas.
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Therefore, the nozzle 4a may fall off due to clogging due to fine dust in the exhaust gas, corrosion due to harmful gases contained in the exhaust gas, particularly chlorine gas, or deterioration at high temperatures of the exhaust gas.

As a result, the nozzle 4a becomes clogged, resulting in poor or impossible spraying, or the nozzle 4a detaches, causing accidents such as water dripping.

Under these circumstances, devices have been considered in which the nozzle 4a protrudes into the gas passage only during spraying, and is protected by retreating into the wall at other times, and efforts are being made to extend the life of the nozzle. However, nozzle blockage or separation accidents are unavoidable, and in reality, these accidents are often overlooked and operations continue.

The present invention has been developed in view of the above-mentioned circumstances, and it is an object of the present invention to provide a spray device configured to be able to detect poor spraying due to nozzle blockage or separation using a simple mechanism.

However, in this invention, the spray nozzle body is disposed in a through hole provided in the wall of the exhaust gas passage so as to be slidable and biased in the backward direction, and at least The gist of the present invention is to provide a detection device for detecting the advanced limit position and the backward limit position of the nozzle body so as not to overlook abnormal conditions occurring in the nozzle.

The configuration and effects of the present invention will be explained below based on the drawings. However, the following embodiment merely shows one specific example, and the design of the nozzle body and the detection device may be variously changed in accordance with the spirit described above and below. , all of which are included in the technical scope of the present invention.

FIG. 3 is a side view showing the spray device of the present invention, and only one will be explained.

That is, the wall 2, the high-pressure water vibro, and the automatic opening/closing valve device 5 are configured in the same manner as described above, and the insertion hole 3 provided in the wall 2 is also configured in the same manner as described above.

On the other hand, the nozzle body 4 also has a nozzle 4a at its tip in the same manner as described above.
However, in the present invention, the nozzle body 4 is inserted into the insertion hole 3.
A flange board 7 is fixed to the rear side of the nozzle body 4, and a coil spring 8 is inserted between the flange board 7 and the bush 9.

The coil spring 8 is compressed and disposed so as to bias the flange plate 7 away from the bushing 9, but this biasing force is opposed to the thrust of the high-pressure water that pushes the nozzle body 4 to the right. Then, adjust the strength so that the nozzle 4a attached to the tip of the nozzle body 4 is balanced at a position slightly protruding into the exhaust gas passage 1.

Therefore, the nozzle body 4 maintains a stationary state toward a position balanced by the force of the water spray and the biasing force of the coil spring 8.

On the other hand, a striker 10 that slides together with the 'aB nozzle body 4 is fixed to the rear of the nozzle body 4, and limit switches 11a and 11b are provided on the inner surface of the storage case 12.

These limit switches 11a and 11b are attached to the front and rear of the striker 10, with the former 11a detecting the advanced limit position of the nozzle 4a with respect to the exhaust gas passage 1, and the latter 11b detecting the backward limit position. When the position of the nozzle body 4 moves and the striker 10 hits any of the limit switches 11a11b, the display device 13 is configured to detect this.

Further, a flexible hose 14 is connected to the rear end side of the nozzle body 4, and the other end of the flexible hose 14 is connected to the outlet side of the automatic opening/closing valve device 5 via a flange 15.

By providing the flexible hose 14 in this manner, even if the nozzle body 4 moves forward or backward, these movements can be absorbed by the flexible hose 14.

FIGS. 4 and 5 are explanatory diagrams illustrating cases where an abnormality occurs in the spray device. FIG. 4 shows a case where the nozzle 4a is blocked, and FIG. 5 shows a case where the nozzle 4a falls off.

That is, as the nozzle 4a becomes increasingly clogged, the pressure of high-pressure water sent into the nozzle body 4 acts strongly on the nozzle 4a, and the thrust far exceeds the biasing force of the coil spring 8.

As a result, the nozzle body 4 is pushed and advanced toward the exhaust gas passage.

When the nozzle 4a reaches a preset advanced limit position, the striker 10 strikes the limit switch 11a and turns on the indicator light 16a to notify the user of an abnormal condition.

Furthermore, if the nozzle 4a is damaged and falls off, the thrust of the high-pressure water that had been in the nozzle 4a is lost, so the urging force of the coil spring 8 becomes stronger than the thrust of the high-pressure water.

As a result, the nozzle body 4 retracts due to the urging force, and when it reaches the preset backward limit position, the striker 1
0 hits the limit switch 11b, turning on the indicator light 16b to notify the abnormal state.

In addition to turning on the indicator light, an alarm buzzer may also be used to notify the user of the above-mentioned abnormal condition.

Further, in addition to always turning on the indicator light, the automatic opening/closing valve device 5 may be operated to close the valve at the same time as an abnormal condition is detected, and the inflow of high-pressure water may be stopped.

When stopping the spray from the nozzle body 4, for example, the automatic opening/closing valve device 5 is closed, or the water supply source valve is closed. This can be easily determined using measuring instruments such as

According to the above-mentioned device, when the exhaust gas temperature drops and cooling is no longer necessary (when spraying is stopped), the nozzle is evacuated from the exhaust gas passage because the thrust of high-pressure water is not applied.

Therefore, the aforementioned clogging can be prevented in advance.

Since the present invention is configured as described above, the following effects can be obtained.

■ Nozzle blockages and falling accidents that occur in spray equipment can be detected extremely quickly.

■ Since nozzle accidents can be detected quickly, the temperature reduction efficiency of exhaust gas is not reduced.

■ Since it is possible to prevent high-pressure water from dripping due to the nozzle falling off, it is possible to prevent damage inside the reactor due to large amounts of cooling water flowing in as much as possible.

[Brief Description of the Drawings] Fig. 1 is an explanatory diagram showing an example of a conventional exhaust gas cooling spray device, Fig. 2 is an explanatory diagram of a partial configuration of Fig. 1, and Fig. 3 is a side view of the spray device of the present invention. 4 and 5 are explanatory diagrams of the operation of FIG. 3. 1...-Exhaust gas passage, 2...Wall body, 3...-Insertion hole,
4... Nozzle body, 4a... Nozzle, 5... Automatic opening/closing valve device, 6... High pressure water pipe, 7... Flange board, 8... Coil spring, 9... Bush 10・−
- Striker-111a. 11b...Limit switch, 12...Storage case, 13...-Display device.

Claims (1)

[Scope of utility model registration request] A spray device that sprays water into an exhaust gas passage to reduce the temperature of exhaust gas, in which the spray nozzle body is arranged so as to be slidable and biased in the backward direction within a through hole provided in the wall of the exhaust gas passage. A spray device for temperature reduction of exhaust gas, characterized in that a detection device for detecting at least the advance limit position and the retreat limit position of the nozzle is provided on the outside of the wall.