JP2763245B2 - Emergency exhaust gas relief device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency exhaust gas relief device capable of preventing dust accumulation and dust blockage in an exhaust gas escape duct and performing stable operation for a long period of time.

[0002]

2. Description of the Related Art Conventionally, during an emergency shutdown of an incinerator, an emergency exhaust gas release device is used to prevent hot gas or unburned gas from the incinerator from flowing into a boiler or an exhaust gas treatment device on the downstream side. It is common practice to discharge from the incinerator duct to the outside. As a conventional emergency exhaust gas escape device of this kind, an exhaust gas escape duct 3 branched from an exhaust duct 2 of an incinerator 1 as shown in FIG.
It is known that the unburned gas from the incinerator 1 is guided by switching the air-driven damper 4 into the inside and discharged to the outside.
However, in this case, there is a problem that dust adheres to the damper 4 and a reliable sealing function cannot be exhibited.

Therefore, recently, an exhaust gas release duct 3 as shown in FIG. 4 is connected to a water seal tank 5 and usually sealed with water, while in an emergency, the furnace pressure control damper 6 is fully closed and the water is closed. A device that drains the water in the sealed tank 5 and discharges the unburned gas of the incinerator 1 to the outside has been developed, thereby protecting the boiler 7 and the exhaust gas treatment device 8 on the downstream side of the incinerator 1. ing. However, in the case of this type, since there is no gas flow in the exhaust gas escape duct 3 during normal operation, dust naturally accumulates in the exhaust gas escape duct 3 and becomes clogged. There has been a problem that the gas cannot be released to the outside. In order to avoid this, there is also a problem that the cleaning operation of the exhaust gas escape duct 3 needs to be performed regularly and frequently regardless of the presence or absence of dust accumulation.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and prevents the accumulation of dust in an exhaust gas escape duct and the obstruction of a passage due to the accumulation of dust, thereby stabilizing for a long period of time. The present invention has been completed for the purpose of providing an emergency exhaust gas relief device capable of performing the above operation.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an emergency exhaust gas relief device according to the present invention has an emergency exhaust gas escape duct in which an end of an exhaust gas escape duct is connected to a water seal tank. in the exhaust gas relief device, Rutotomoni provided descending duct portion having a repose angle or slope of dust into the exhaust gas relief duct, the end of the exhaust gas relief duct
A pressure detector is provided at the end to detect the pressure in the duct, and
Detection of duct blockage based on pressure value of pressure detector
A blockage detector is provided .

[0006]

With this construction, in an emergency, the furnace pressure control damper is fully closed and the water in the water seal tank is drained to discharge unburned gas from the incinerator to the outside through the exhaust gas escape duct. This is the same as the conventional emergency exhaust gas release device of this type, but the exhaust gas release duct has a rising duct portion having a slope equal to or greater than the repose angle of dust and a descending portion following the rising duct portion. And the air duct, the natural accumulation of dust in the exhaust gas escape duct and the obstruction of the passage due to the natural accumulation are prevented, and the exhaust gas escape duct is always kept in a clean state. Become.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In the figure, 1 is an incinerator, 3 is an exhaust gas release duct branched from the exhaust duct 2 of the incinerator 1, and 5 is a water sealing tank connected to the exhaust gas release duct 3. The other branch pipe of the exhaust duct 2 is connected to a boiler 7 and an exhaust gas treatment device 8 on the downstream side, and during normal operation, the clean gas subjected to the purification treatment is sucked by the blower 9 from the stack 10. Discharging is the same as in the prior art (see FIG. 4).

The exhaust gas escape duct 3 is composed of an ascending duct 3a having an inclination greater than the angle of repose of dust and a descending duct 3b following the ascending duct 3a. During operation, even when there is almost no gas flow in the exhaust gas escape duct 3, dust naturally falls along the inclined surfaces of the ascending duct portion 3a and the descending duct portion 3b. It is configured such that it does not naturally accumulate in the exhaust gas escape duct 3.
The angle of repose of the dust may be set to 40 degrees or more in a general incinerator.

In this embodiment , as shown in FIG. 2, a pressure detector 11 for detecting the pressure in the exhaust gas release duct 3 is provided at the end of the exhaust gas release duct 3, and the pressure of the pressure detector 11 is reduced. the occlusion detector 12 for detecting the clogging presence of the duct based on the value are provided. In this case, for example, the pressure fluctuation of the pressure detector 11 is detected by the sensor 11a, and the output of the sensor 11a is measured by the occlusion detector 12,
It may be configured to determine that there is no blockage when pressure fluctuation is detected, and that blockage is detected when pressure fluctuation is not detected anymore.

[0010] In the apparatus constructed as described above, the furnace pressure control damper is fully closed and the water in the water seal tank 5 is drained in the emergency to remove the water from the incinerator 1 similarly to the conventional emergency exhaust gas escape system. By discharging the unburned gas to the outside through the exhaust gas escape duct 3, the boiler and the exhaust gas treatment device on the downstream side are protected, but the exhaust gas escape duct 3 is larger than the repose angle of dust. The exhaust duct 3a is composed of the ascending duct 3a and the descending duct 3b following the ascending duct 3a.
The natural accumulation of dust in the inside and the obstruction of the passage due to the natural accumulation are surely prevented. Therefore, the inside of the exhaust gas discharge duct 3 is always kept clean, and the discharge of unburned gas and the like in an emergency can be accurately performed over a long period of time. Exhaust gas escape duct 3
The duct has a blockage detection mechanism at the end of the duct to detect the blockage of the duct, so even if the dust adheres and solidifies easily and blocks the duct easily, it can always accurately grasp the blockage of the duct. As a result, it is not necessary to perform regular and frequent cleaning work in a dark cloud regardless of the presence or absence of dust accumulation as in the related art, and excellent workability can be exhibited.

[0011]

As is clear from the above description, with the present invention prevents the clogging of the passages due to deposition and the dust deposition of dust in the duct for relief exhaust, perform stable operation for a long period of time, duct The presence or absence of
It can always be accurately grasped and has excellent workability . Therefore, the present invention greatly contributes to industrial development as an emergency exhaust gas relief device that has eliminated the problems of the prior art.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a front view showing another embodiment.

FIG. 3 is a front view showing a conventional technique.

FIG. 4 is a front view showing another related art.

[Explanation of Signs] 3 Exhaust gas escape duct 3a Ascending duct 3b Ascent duct 5 Water seal tank 10 Pressure detector 11 Blockage detector

Claims (1)

(57) [Claims] 1. The end of an exhaust gas escape duct in an emergency
In the end exhaust gas relief device for emergency linked to a water seal chamber and Rutotomoni provided descending duct portion having a slope of more than the angle of repose of dust into the exhaust gas relief duct, said waste gas
Pressure to detect the pressure inside the duct at the end of the
A force detector is provided, and the pressure is detected based on the pressure value of the pressure detector.
An emergency exhaust gas release device, comprising a blockage detector for detecting the presence or absence of blockage of the gas.