JPH07217855A - Clinker hopper - Google Patents

Abstract

PURPOSE:To prevent the sedimentation and accumulation of ash in a seal tank by providing an ash invasion preventing plate, having movability, so as to be abutted against the inner surface of the main body of a clinker hopper. CONSTITUTION:A seal plate 6 is hung in a seal tank 2, provided on the upper periphery of the main body 1 of a clinker hopper and filled with water, so that the tip end thereof is submerged into the water in the seal tank 2. An ash invasion preventing plate, having movability, is attached to the inside of the seal plate 6 so as to be contacted with the inner surface of the main body 1 of the clinker hopper at all times. The hearth of a furnace is moved downward and horizontal direction due to the thermal expansion of the same during operation while the preventing plate 9 follows the difference of the amount of movement and is contacted closely with the inner surface of the main body 1 of the clinker hopper at all times whereby the invasion of ash into the seal tank 2 at the Outer periphery of the hopper from the furnace through the inside of the main body 1 of the clinker hopper. According to this method, the sedimentation and accumulation of ash in the seal tank 2 can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clinker hopper applied to a furnace such as a boiler.

[0002]

2. Description of the Related Art FIG. 3 is an explanatory view of a conventional clinker hopper used in a boiler furnace. In the figure, a clinker hopper for collecting ash that is generated when burning a solid fuel containing ash such as coal and falls from the furnace bottom 3 is provided in the lower portion of the furnace bottom 3 of the boiler furnace,
A sealing tank 2 is provided along the outer periphery of the upper portion of the clinker hopper body 1 to store sealing water. Then, the seal plate 6 is hung on the furnace bottom portion 3 via the hanging lug 4, the mounting bolt 5 and the like, and the tip of the seal plate 6 is always submerged in the seal water to prevent air from leaking into the furnace. To prevent. Further, the drip seal 9 is hung inside the seal plate 6 via the hanging hardware 7, the mounting bolt 8 and the like to prevent ash from entering the sealing water.

[0003]

In the conventional clinker hopper as described above, since the drip seal 9 moves three-dimensionally due to the thermal expansion of the furnace bottom portion 3, the gap between the clinker hopper body 1 and the drip seal 9 is increased. It is necessary to take a sufficient amount, and the ash enters the sealing tank 2 from this gap and precipitates and accumulates. In order to discharge this ash regularly, some injection nozzles 05 and discharge holes 07 are installed in the seal tank 2, and the injection valve 03 and the discharge holes of the seal water supply pipe 04 connected to the injection nozzles 05. It is necessary to sequentially arrange a large number of pairs of discharge valves 09 of the drain pipe 08 connected to 07 to supply and discharge sealing water, and this ash discharge device and control system are very complicated. Has become. Further, even if the ash discharging device having such a structure is arranged, the ash enters and accumulates in the sealing tank 2, and the maintenance of the water level of the sealing water is hindered.

[0004]

The clinker hopper according to the present invention is intended to solve the above-mentioned problems, and is provided above the clinker hopper body with a seal tank provided on the upper outer periphery of the clinker hopper body. The lower end of the seal plate suspended from the bottom of the furnace is submerged in the seal water in the seal tank to prevent gas from entering the furnace, and a preventive plate is installed inside the seal plate to seal the seal. In a clinker hopper that prevents ash from entering the tank, the prevention plate is flexible and is provided in contact with the inner surface of the clinker hopper body.

Further, the clinker hopper according to the present invention is
A seal tank is installed on the outer periphery of the upper part of the clinker hopper body, and the lower end of the seal plate suspended from the furnace bottom part of the furnace provided above the clinker hopper body is submerged in the seal water in the seal tank. In a clinker hopper that prevents gas from entering the furnace and prevents ash from entering the seal tank by installing a preventive plate inside the seal plate, the preventive plate has a plurality of elastic and corrosion-resistant materials. The present invention is characterized in that it is made of plywood in which thin plates are stacked or plywood in which asbestos sheets are sandwiched by stainless wire mesh, and has flexibility and is provided in contact with the inner surface of the clinker hopper body.

Further, the clinker hopper according to the present invention is
A seal tank is installed on the outer periphery of the upper part of the clinker hopper body, and the lower end of the seal plate suspended from the furnace bottom part of the furnace provided above the clinker hopper body is submerged in the seal water in the seal tank. In a clinker hopper that prevents gas from entering the furnace and prevents ash from entering the seal tank by installing a preventive plate inside the seal plate, the preventive plate has a plurality of elastic and corrosion-resistant materials. The plywood laminated with the thin plates or the plywood sandwiching the asbestos sheet with stainless steel wire mesh is flexible and provided in contact with the inner surface of the clinker hopper body, and the seal water is supplied to the seal tank. It is characterized in that it is provided with means for overflowing the sealing tank into the clinker hopper body.

[0007]

That is, in the clinker hopper according to the present invention, the seal tank is installed on the outer periphery of the upper portion of the clinker hopper body, and the lower end of the seal plate hung at the bottom of the furnace provided above the clinker hopper body is A preventive plate in the clinker hopper is possible to prevent gas from entering the furnace by submerging it in the seal water in the seal tank and to install an preventive plate inside the seal plate to prevent ash from entering the seal tank. It has flexibility and is provided in contact with the inner surface of the clinker hopper body.During operation, the furnace bottom moves vertically and horizontally due to thermal expansion, whereas the clinker hopper body is fixed on the ground. However, due to the flexibility of the plate that prevents the invasion of ash, it follows this difference in the amount of movement and always adheres to the inner surface of the clinker hopper body, so that the ash is removed from the furnace. Through Nkahoppa body to prevent from entering the sealed chamber of the outer periphery. As a result, ash does not settle or accumulate in the sealing tank.

Further, in the clinker hopper according to the present invention, a seal tank is installed on the outer periphery of the upper part of the clinker hopper body, and the lower end of the seal plate hung on the furnace bottom part of the furnace provided above the clinker hopper body. Preventing gas from entering the furnace by submerging it in the sealing water in the sealing tank, and installing a preventive plate inside the seal plate to prevent ash from entering the sealing tank The preventive plate in the clinker hopper is elastic It is formed by plywood consisting of multiple thin plates having corrosion resistance and corrosion resistance or plywood sandwiching asbestos sheets with stainless wire mesh, and is provided in contact with the inner surface of the clinker hopper body with flexibility, and during operation While the bottom of the furnace moves downward and horizontally due to thermal expansion, the clinker hopper body is fixed on the ground, but ash does not enter. Since the gusset prevention plate has elasticity and corrosion resistance and flexibility, it follows this difference in the amount of movement and always adheres to the inner surface of the clinker hopper body, and the ash passes through the clinker hopper body from the furnace and seals the outer circumference. Prevent entry into the tank. As a result, ash does not settle or accumulate in the sealing tank.

Further, in the clinker hopper according to the present invention, a seal tank is installed on the outer periphery of the upper portion of the clinker hopper body, and the lower end of the seal plate hung on the furnace bottom portion of the furnace provided above the clinker hopper body. Preventing gas from entering the furnace by submerging it in the sealing water in the sealing tank, and installing a preventive plate inside the seal plate to prevent ash from entering the sealing tank.The preventive plate in the clinker hopper is elastic. It is made of plywood consisting of a plurality of thin plates having corrosion resistance and corrosion resistance or plywood sandwiching asbestos sheets with stainless wire mesh, and has flexibility and is provided in contact with the inner surface of the clinker hopper body, and seal water is provided. It is supplied to the seal tank and overflows from the seal tank into the clinker hopper body. While the clinker hopper main body is fixed on the ground, whereas the clinker hopper body moves downward and horizontally due to thermal expansion, the ash intrusion prevention plate has elasticity and corrosion resistance as well as flexibility. Following this difference in movement amount, the ash is always adhered to the inner surface of the clinker hopper body to prevent ash from entering the outer peripheral sealing tank from the furnace through the clinker hopper body. As a result, ash does not settle or accumulate in the sealing tank. Also, because the sealing water overflows from the sealing tank into the clinker hopper body, a very complicated ash discharging device is placed in the sealing tank, and it is not necessary to constantly supply and drain the sealing water, and the sealing water control system is extremely simple. Become.

[0010]

1 is an explanatory view of a clinker hopper according to a first embodiment of the present invention, and FIG. 2 is an explanatory view of a clinker hopper according to a second embodiment. In the figure, the clinker hoppers according to these examples are used in a furnace such as a boiler. As shown in the figure, a solid fuel containing ash such as coal is burned in the lower part of the bottom 3 of the furnace of the boiler. A clinker hopper is provided for collecting ash that is generated when the ash is dropped from the bottom 3 of the furnace, and the clinker hopper body 1 is provided.
A sealing tank 2 is provided along the outer periphery of the upper part of the tank to store the sealing water. Then, a seal plate 6 is hung on the furnace bottom portion 3 via a hanging lug 4, a mounting bolt 5, etc., and air is leaked into the furnace so that the tip of the seal plate 6 is always immersed in the sealing water. Are prevented. Further, an ash intrusion prevention plate 9 is hung inside the seal plate 6 via a holding plate 7, a mounting bolt 8 and the like to prevent ash from entering the seal water.

The clinker hopper according to the first embodiment is
As shown in FIG. 1, the outside of the clinker hopper body 1 is surrounded by a steel plate, and a refractory material is applied to the inside of the clinker hopper body 1 to withstand high temperatures and prevent water leakage. Seal water is supplied from the water supply pipe 12 to the sealing tank 2 provided on the outer periphery of the upper portion of the clinker hopper body 1, and is filled with the water.
The upper portion of the clinker hopper body 1 overflows into the clinker hopper body 1. The tip of the seal plate 6 suspended through the furnace, the suspension lug 4 welded to the furnace bottom 3, the mounting bolts 5, etc., is always immersed in the seal water. An ash intrusion prevention plate 9 is attached to the inner peripheral side of the seal plate 6 via a holding plate 7, mounting bolts 8 and the like. This ash intrusion prevention plate 9 is a flat plate formed by stacking a number of elastic, thin, and corrosion-resistant short plate-shaped plates, and is attached so as to always contact the inner surface of the clinker hopper body 1. ing. As shown in FIG.
A seal water supply device is installed like the clinker hopper shown in, and the seal water is supplied from the seal water supply pump into the seal tank 2, and the water level in the clinker hopper main body 1 is kept constant by one level controller. It is designed to keep A water tap 11 is provided below the seal tank 2 to drain water from the inside of the clinker hopper body 1 when inspecting or repairing the seal tank 2.
The water is drained into the clinker hopper main body 1 through 0.

During operation of the boiler, the bottom 3 of the furnace moves downward and horizontally due to thermal expansion. On the other hand, the clinker hopper body 1 is fixed on the ground and moves relatively upward and horizontally with respect to the furnace bottom 3. The vertical portion of the ash intrusion prevention plate 9 is sufficiently larger than the space h above the clinker hopper body 1 so that the ash intrusion prevention plate 9 follows the difference in the movement amount and is always in close contact with the inner surface of the clinker hopper body 1. The ash intrusion prevention plate 9 and the inner surface of the clinker hopper main body 1 have a maximum movement amount of about 20 mm, which is set to a long distance to cover the vertical movement amount. Always keep constant and almost zero.

The structure of the clinker hopper according to the second embodiment is substantially the same as that of the clinker hopper according to the first embodiment as shown in FIG. 2, but the ash intrusion prevention plate 9 uses the asbestos sheet 9a for the stainless wire mesh. It has a structure of being sandwiched by 9b, and has flexibility so that it is always in close contact with the inner surface of the clinker hopper body 1. A seal water supply device is installed in the water supply pipe 12 of the seal tank 2, the seal water is supplied from the seal water supply pump 17 into the seal tank 2, and the inside of the clinker hopper main body 1 is controlled by one level controller 18. The surface of the water is kept constant. A water tap 11 is provided in the lower part of the seal tank 2 to drain the water inside the clinker hopper body 1 when inspecting or repairing the seal tank 2, and the clinker hopper body is inserted through the water drain pipe 10. It is designed to drain into 1. This makes it possible to obtain the same operation and effect as the clinker hopper according to the first embodiment.

In the conventional clinker hopper, some sealing nozzles are provided with an injection nozzle and a discharge hole, and a drain valve connected to an injection valve and a discharge hole of a seal water supply pipe connected to this injection nozzle. It is necessary to sequentially arrange a large number of pairs of pipe discharge valves as a pair to supply and discharge sealing water at all times, and this ash discharge device and control system are very complicated. Further, even if the ash discharging device having such a structure is installed, the ash enters and accumulates in the seal tank, and the maintenance of the water level of the seal water is hindered, but in the clinker hopper according to the above-described embodiment, the furnace In order to prevent ash from penetrating into the seal tank 2 from the bottom, the ash intrusion prevention plate 9 suspended from the furnace bottom 3 is made to have elasticity, and specifically, the ash intrusion prevention plate 9 has a short strip shape. One end of the plate is overlapped and formed in a flat shape, or a structure formed by sandwiching a stainless wire mesh between asbestos sheets, etc. is attached so as to be in close contact with the inner surface of the clinker hopper body 1, and in the sealing tank 2 Sealing water overflows the upper part of the clinker hopper and the main body 1, and even if the ash intrusion prevention plate 9 moves due to the thermal expansion of the furnace bottom part 3 of the furnace, the sealing water always adheres to the inner surface of the upper part of the clinker hopper main body 1. That More ash does not penetrate into the seal vessel 2 through a clinker hopper body 1 from the furnace. As a result, the ash does not settle in the sealing tank 2 and does not accumulate, so that it is not necessary to install an ash discharging device and the control system for the sealing water becomes simple. Further, the sealing water continuously overflows and flows down from a slight gap between the ash intrusion prevention plate 9 and the clinker hopper body 1, thereby forming a water curtain along the sealing plate 9 and the clinker hopper body 1, and Ashes are prevented from entering the tank 2 and the ash intrusion prevention plate 9 is cooled so that the ash intrusion prevention plate 9 is not burned or dropped. In addition, since ash does not enter the seal tank 2 from the furnace during operation and accumulates, the drainage of the seal water is also removed at the time of inspection by removing the faucet of the seal tank 2 from the drain pipe 10 to the inside of the clinker hopper body 1. It can be directly dropped into the water, and there is no need to install special wastewater treatment facilities.

[0015]

The clinker hopper according to the present invention is constructed as described above, and since ash does not settle and accumulate in the sealing tank, a very complicated ash discharging device is arranged to seal water. It is not necessary to constantly supply and drain water, and simply fill the sealing tank with sealing water. Therefore, the control system for the sealing water becomes extremely simple.

[Brief description of drawings]

FIG. 1 (a) is a sectional view of a clinker hopper according to a first embodiment of the present invention, FIG. 1 (b) is a sectional view of its ash intrusion prevention plate, and FIG. 1 (c) is a perspective view thereof. Is.

FIG. 2 (a) is a sectional view of a clinker hopper according to a second embodiment of the present invention, and FIGS. 2 (b) and 2 (c) are sectional views of a plate for preventing invasion of ash thereof.

FIG. 3 (a) is a sectional view of a conventional clinker hopper, and FIG. 3 (b) is a piping system diagram thereof.

[Explanation of symbols]

 1 Clinker hopper main body 2 Sealing tank 3 Furnace bottom 4 Hanging lug 5 Mounting bolt 6 Seal plate 7 Holding plate 8 Mounting bolt 9 Ash intrusion prevention plate 9a Asbestos sheet 9b Stainless steel wire mesh 10 Drain pipe 11 Faucet 12 Water supply pipe 17 Supply Pump 18 level controller

Claims (3)

[Claims] 1. A seal tank is installed on an outer periphery of an upper portion of a clinker hopper body, and a lower end of a seal plate hung on a bottom of a furnace provided above the clinker hopper body is used as seal water in the seal tank. In a clinker hopper that prevents submersion of gas into the furnace and prevents gas from entering the furnace, and also installs a preventive plate inside the seal plate to prevent ash from entering the seal tank, the preventive plate is flexible. And a clinker hopper provided in contact with the inner surface of the clinker hopper body. 2. The clinker according to claim 1, wherein the prevention plate is formed of a plywood having a plurality of thin plates having elasticity and corrosion resistance or a plywood in which an asbestos sheet is sandwiched by stainless wire mesh. Hopper. 3. The clinker hopper according to claim 1, further comprising means for supplying the sealing water to the sealing tank and causing the sealing water to overflow into the clinker hopper body.