JP2584421Y2 - Exposure valve in sludge incinerator - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-sealed anti-explosion valve installed in an incinerator for sludge or the like. [0002] An incinerator is used as one of the methods for treating sewage sludge, waste, and the like.
An anti-exposure valve is installed as a safety measure for the furnace. In general, there are a dry type and a water-sealed type as the exposure valve. [0003] A dry exposure valve mainly opens and closes a door by a hinge mechanism. For example, as shown in FIG.
The door 15 is attached to the air discharge pipe 2 by the weight 16 when the explosion occurs in the incinerator, and when the pressure becomes abnormally high, the door 15 is opened by the pressure. The opening pressure is released outside the furnace. The water-sealed anti-explosion valve uses water as a sealing material, and surrounds an inflow pipe 5 connected to an air discharge pipe 2 provided in a flue 1 of an incinerator, for example, as shown in FIG. A casing 3 having an open top is provided,
Water 4 is stored in the lower part of the casing 3, and the cap 17 having the lower part protruding into the water 4 is fixedly provided so as to surround the inflow pipe 5, and is always provided with a water sealing action. The inside of the flue 1 and the atmosphere are shut off, and when the pressure inside the furnace becomes abnormally high, the water seal is broken by that pressure to eliminate the exposure pressure. [0004] The above-mentioned dry type exposure valve is automatically opened mechanically by a positive pressure difference from the inside of the furnace, and a negative pressure is dealt with by a seal. Due to the mechanism, there are long-term problems of reliability of the rotation and operation of the sliding portion, and poor sealing performance in the case of furnace negative pressure. [0005] In addition, the water-sealing type anti-exposure valve has good sealing properties, but due to the characteristics of the water-sealing structure, the exposed gas once hits the top of the cap body 17 and then descends. Because there is one round trip of reflection of the pressure wave, such as going around the lower end of the and rising upward, there is a problem as to whether or not the exposure can be controlled below the target pressure. The present invention solves the above-mentioned problems of the conventional anti-explosion valve, and provides a water-proof type water-sealing valve capable of mitigating pressure waves due to exposure and operating with high reliability. It is assumed that. The structure of the present invention for achieving the above object will be described with reference to the drawings corresponding to the embodiments. The present invention discharges sealing water 4 at the bottom. An inflow pipe 5 connected to the flue 1 of the incinerator is provided so as to protrude to a position higher than the water level of the sealing water 4 in a bottomed cylindrical casing 3 which stores the inflow pipe 5 as much as possible. A floating valve body 11 provided with a float 12 is provided at a lower end of a cap-shaped body 13 having a shape surrounding the cap, and holes 6 and 6 for venting are provided at an upper end of the inflow pipe 5. It is assumed that. In the exposure valve of the present invention, the sealing water 4 is normally stored to a position slightly lower than the vent hole 6, and the floating valve body 11 floats in the water 4 and the inflow pipe 5 Covers the upper end. Therefore, the normal positive and negative pressures in the incinerator
By balancing the buoyancy with the float 12, the floating valve body 11 slightly floats and sinks to seal. When the pressure inside the incinerator rises due to exposure in the incinerator, as shown in FIG. 2, the pressure strikes the floating valve body 11 against its weight and pushes it up. , And the pressure wave passes between the float 12 and the water 4 and exits to the discharge pipe 8 as shown by the arrow in the figure. When it becomes necessary to discharge air from the incinerator, the on-off valve 9 is opened and the sealing water 4 is discharged.
As shown in FIG. 3, the floating valve body 11 descends and rests on the upper end of the inflow pipe 5, and the gas in the furnace flows from the holes 6 and 6 to the float 12 and the bottom plate 3.
a to be discharged. An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, reference numeral 1 denotes a flue connected to the upper end of an incinerator (not shown), and a blow-off tube 2 is branched and protruded at a suitable upper portion of the flue. Attached to That is, reference numeral 3 denotes a bottomed cylindrical casing in which sealing water 4 is stored. In the casing 3, the air discharge pipe 2 penetrates through the center of the bottom plate 3 a.
An inflow pipe 4 communicating with the bottom plate 3a protrudes to a position higher than the water level of the sealing water 4, and is tightly bound to the bottom plate 3a. The upper end of the introduction pipe 5 is provided with holes 6 and 6 for venting, and the lower end of the introduction pipe 5 projecting downward from the bottom plate 3a is connected to the air discharge pipe 2 via a flange. Has become. An inverted funnel-shaped cover 7 having a discharge pipe 8 is provided at an open upper end of the casing 3, and a drain pipe 10 having an on-off valve 9 is connected to a bottom of the casing 3. In the casing 3, a cap-like body 13 having a shape surrounding the upper portion of the introduction pipe 4 is provided between the inner wall thereof and the introduction pipe 4 and a float 12 having an annular shape with a required gap therebetween. An attached floating valve body 11 having a height lower than the entry height of the inflow pipe 5 is provided, and lands on the sealing water 4 stored in the bottom of the casing 3 via the float 12 and projects from the water 4. The upper part of the inflow pipe 5 is covered. Thereby,
The flow inside and outside the furnace through the inflow pipe 5 is cut off via the floating valve body 11 and the sealing water 4. Positive pressure in the furnace during normal operation of the incinerator,
With respect to the negative pressure, by balancing these pressures with the buoyancy of the float 12, the floating valve body 11 slightly rises and falls depending on the pressure, and the seal is held. Then, when exposure occurs in the incinerator, the exposure pressure acts on the cap-shaped body 13 of the floating valve body 11 from the inflow pipe 5 and the floating valve body
11 will be pushed up, thereby floating 12
Is separated from the sealing water 4, the seal is broken, and the exposure pressure escapes from the upper end of the inflow pipe 5 through the space between the float 12 and the sealing water 4 to the discharge pipe 8 to prevent exposure. In addition, when air in the incinerator is required, the on-off valve 9 is opened and the sealing water 4 is discharged from the drain pipe 10, and the floating valve
11 is seated on the upper end of the inflow pipe 5, and the gas in the furnace exits through the holes 6, 6 of the inflow pipe 5 and is discharged through the discharge pipe 8 from the gap between the float 12 and the bottom plate 3a. Become. As described above, according to the present invention,
Since the upper end of the inflow pipe is surrounded by a floating valve that can move freely, if exposure occurs in the incinerator, the floating valve is pushed up by the pressure and the seal is easily and reliably sealed. The exposure can be released, and the exposure can be released, and the exposure can be eliminated without causing a large load or damage to the device by relaxing the exposure. Moreover, normally, the advantage of a water seal is also provided by the seal between the floating valve body and the water, and the sealing performance is good even with a negative pressure. . In addition, since the valve of the present invention has no mechanical part, reliable operation can be maintained for a long time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention. FIG. 2 is a longitudinal sectional view showing an operating state at the time of exposing in the furnace. FIG. 3 is a longitudinal sectional view showing a state at the time of the air blowing. FIG. 4 is a longitudinal sectional view showing a conventional dry exposure valve. FIG. 5 is a vertical cross-sectional view showing the water-sealed exposure valve. [Description of Signs] 1 Flue 2 Outlet 3 Casing 4 Sealing water 5 Inlet 6 Outlet 8 Outlet 10 Drain 11 Floating valve 12 Float 13 Cap 13

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model 50-83889 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F23M 11/00 F23G 5/50 F16K 17 / 00-17/168

Claims (1)

(57) [Claims for registration of utility model] In a bottomed tubular casing that stores sealing water at the bottom so that it can be discharged, place the inflow pipe connected to the flue of the incinerator above the level of the sealing water. And a floating valve body provided with a float at the lower end of a cap-shaped body surrounding the upper part of the inflow pipe, and a vent hole at the upper end of the inflow pipe. An anti-explosion valve in a sludge incinerator characterized by being provided.