JP2007198725A - Facility for handling and treating solid combustion residue of fuel from combustion facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a facility for handling and treating solid combustion residue of fuel from a combustion facility. <P>SOLUTION: This facility comprises at least one storage container 1 provided with a water basin 3, the container being disposed on the lower side of an ash discharge hopper 2 of the combustion facility. A crusher 4 for finely crushing the combustion residue of fuel discharged from the ash discharge hopper is disposed above the water basin in the storage container 1. A hydraulic carrying apparatus 5 is connected to the storage container 1, and this apparatus supplies the suspension composed of water and combustion residue of fuel from the storage container 1 to a separating apparatus 6 for separating solid component. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to equipment for handling and processing solid fuel shells from combustion equipment.

In a combustion facility, when fossil fuels such as coal, lignite, coke, and other solid fuels such as garbage are burned, solid fuel shells, also called slag or ash, are generated. In the framework of well-known measures, a wet ash removal device is provided to contain the burning ash, in which the ash that can reach a temperature of about 500-600 ° C is extinguished with water. is doing. This wet ash removal apparatus has a storage container which extends long, and the container is provided with a puddle, and is disposed under an opening of an ash discharge hopper, which usually has a plurality of combustion facilities. It has a conveyor device using a circulating chain, which contains the fuel shells discharged from the ash discharge hopper and carries them to a raised dumping site. The chain of the conveyor device is heavily abused and is considerably consumed. Furthermore, the inner surface of the wet ash removal apparatus requires a lining that is difficult to wear. The maintenance work and the repair at the time of failure take time. Therefore, in many cases, in many cases, the maintenance / repair work of the wet ash removal apparatus stops the operation of the combustion facility.
JP 2006-300516 A

  Based on the above background, an object of the present invention is to provide an easy-to-maintain facility for carrying out and handling fuel shells. In particular, it is assumed that the replacement of the equipment part arranged under the ash discharge hopper can be carried out without any problem.

  The subject of the invention and the solution to this problem is an installation for handling and treating solid fuel shells from a combustion installation according to claim 1. This facility has at least one containment container which is arranged below the ash discharge hopper of the combustion facility and is provided with a puddle. A crusher for finely crushing the fuel shell discharged from the ash discharge hopper is disposed in the storage container above the puddle. Water is sown in the space of this crusher. Furthermore, a device for transporting by water pressure is connected to the storage container, and the device is a separation device for separating a solid consisting of water and fuel shells from the storage container. To supply. Where the combustion facility has a plurality of ash discharge hoppers, each ash discharge hopper is assigned to a separate containment container having a crusher and a device for transporting a suspension of fuel shells and water by water pressure. The piping of the device for transporting by this hydraulic pressure is advantageously realized as a tube tube which is wholly or partly flexible. The suspension streams removed from the plurality of storage containers can be fed to a common separation device for separating solids. The substantially solid-free liquid flowing out of the separation device is returned to the storage containers and distributed to these storage containers.

  A slider is advantageously arranged between the ash discharge hopper and the storage container. By closing the slider, the containment container can be disconnected and replaced with a suitable alternative device for maintenance or repair work without interrupting the operation of the combustion facility. For the purposes of this invention, the containment container is arranged in a movable manner on the rail and is spaced from the work area under the corresponding ash discharge hopper and the work area for maintenance. It is possible to move between the second positions.

  The crusher arranged in the container portion of the storage container above the puddle crushes the slag discharged from the ash discharge hopper to such an extent that the solid component can be carried by water pressure. Water is poured into the inlet region of the crusher using a nozzle pipe extending in a circular shape. Advantageously, the crusher is designed so that the particle size of the solids after being finely crushed is between 0 and 50 mm. For the purposes of this invention, the crusher is a roll crusher. However, other embodiments are not excluded.

  The ash discharge hopper can be hermetically connected to the storage container. Advantageously, a funnel immersed in a puddle is placed under the crusher. The ash discharge hopper is equipped with a pressure adjustment mechanism as suitable for the object of the present invention. In order to regulate the pressure, a pressure-regulating pipe is attached to the shroud area of the containment container above the water surface, so that the pressure regulation during the deflagration that may occur in some cases is guaranteed.

  The suspension discharged from the storage container by a pump is supplied to a separation device for separating solids. Advantageously, the separating device has a shaking screen. After separation of the fine solids, the filtered liquid can be returned to the receiving container. The filtered residue is a product from which the residual moisture is typically about 30% or less, and can be stored in a silo and transported without using a special vehicle. It is. This product can be used commercially, for example in civil engineering, in particular as an additive to building materials.

  Another advantageous embodiment is that the shaking screen has two side-by-side or overlapping filter beds, one of which has a coarse screen and the other filter bed is fine It is defined as having a screen. The thing which passed the coarse screen and the fine screen is supplied to a hydrocyclone using a pump. The residue filtered through a coarse screen and a fine screen can be used commercially as an ash product from which moisture of different particle sizes has been removed. The liquid flow from the upstream of the hydrocyclone is almost free of solids and is returned to the receiving container again. A solids-rich suspension stream downstream from the hydrocyclone can be fed to the shaking screen. The circulation of the closed liquid is completed over a wide range, so that basically only the liquid loss associated with the removal of the debris removed and filtered is compensated.

  In the following, the invention will be described on the basis of a drawing illustrating only one embodiment.

  The installation shown in the drawing has a plurality of mutually independent containment containers 1, which are arranged under the combustion installation and are respectively assigned to the ash discharge hopper 2 of the combustion installation. Each of these storage containers 1 includes a crusher 4 for finely crushing a fuel shell discharged from the ash discharge hopper 2, which has a water reservoir 3 and is disposed in a container portion above the water reservoir 3. Yes. The crusher space is filled with water, which is advantageously supplied using a circularly extending nozzle pipe. The storage container 1 is connected with a device 5 for transporting by water pressure, and the device separates the suspension of water and fuel shells from the storage container 1 for separating solids. This is supplied to the device 6. The liquid is returned to the container 1 after the solid is separated.

  The ash discharge hopper 2 and the storage container 1 are hermetically connected. Under the crusher 4, a funnel 14 immersed in the water reservoir 3 is arranged. A pressure adjusting pipe 15 is connected to the enclosure plate of the storage container 1 to guarantee pressure adjustment with respect to the surroundings in the event of deflagration that may occur.

  A slider 7 is disposed between the ash discharge hopper 2 and the storage container 1. When maintenance work for the container 1 or the device attached thereto is required, the slider 7 is closed. Thereafter, the storage container 1 can be separated from the ash discharge hopper 2 without stopping the operation of the combustion facility. From FIG. 2, the storage container 1 is arranged so as to be movable on the rail 8, and for maintenance, a work area I below the corresponding ash discharge hopper and a second spaced apart from this work area. It can be seen that it is possible to move to and from point II. Then, the storage container 1 ′ prepared in advance can be moved to the work point I and connected to the ash discharge hopper 2.

  The crusher 4 is configured as, for example, a roll crusher, and crushes the slag discharged from the corresponding ash discharge hopper 2 to such an extent that the solid matter in the water reservoir can be transported by water pressure as a suspension. In order to meet the object of the present invention, the crusher 4 is designed so that the particle size of the solid material is 0 to 50 mm. In the embodiment, the crusher 4 is arranged in a container portion above the water reservoir 3, and the space of the crusher is watered using a ring tube. In the embodiment, the storage container 1 has a rough screen 9 for filtering out foreign substances such as iron pieces. The screen surface of the coarse screen 9 is inclined, and as a result, the remaining foreign matter that may be generated in some cases can be collected at the lower end and can be easily removed from time to time. In this embodiment, the coarse screen 9 is configured as a double screen and has two overlapping screen surfaces. With this configuration, it is possible to effectively separate the metal wires.

  In this embodiment, the separating device 6 is composed of a shaking screen with two filter beds 10, 10 'arranged side by side or stacked. One of these filter beds has a coarse screen 10 and the other filter bed has a fine screen 10 '. The filtered residue yields ash products that are considerably dehydrated at different sieving rates and can be used commercially as additives to building materials, for example, in civil engineering. The thing which passed the mesh | network of the coarse screen 10 and the fine screen 10 'is supplied to the liquid cyclone 11 using a pump, and this liquid cyclone makes the liquid flow the liquid substantially free of solids upstream of a cyclone. Stream 12 and suspension stream 13 taken off at the lower end of the hydrocyclone. The suspension stream 13 is again fed into the shaking screen. The almost solid-free liquid 12 generated upstream of the cyclone is returned to the storage container 1.

Equipment for handling and processing solid fuel shells from combustion equipment View from A in FIG. The figure which expanded the section of the equipment illustrated in Drawing 1 compared with Drawing 1

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage container 1 'Storage container prepared in advance 2 Ash discharge hopper 3 Puddle 4 Crusher 5 Apparatus for conveying by hydraulic pressure 6 Separation device 7 Slider 8 Rail 9 Coarse screen of storage container 1 10 Coarse screen 10 of separation device 6 'Fine screen of separator 6 11 Hydrocyclone 12 Liquid almost free of solid 13 Suspension flow 14 Funnel 15 Pressure adjustment pipe A View direction I Work area under ash discharge hopper II Space from work area I Second point

Claims (9)

For handling and processing solid fuel shells from the combustion facility, which are arranged under the ash discharge hopper (2) of the combustion facility and have at least one containment container (1) with a sump (3) Equipment,
A crusher (4) for finely crushing the fuel shell discharged from the ash discharge hopper (2) is disposed on the water reservoir (3) in the storage container (1). The space is watered,
The storage container (1) is connected to a device (5) for transporting by water pressure, and this device is used to transfer a suspension of water and fuel shells from the storage container (1) to a solid substance. Equipment to be supplied to a separation device (6) for separating   2. Equipment according to claim 1, characterized in that a slider (7) is arranged between the ash discharge hopper (2) and the storage container (1).   3. Equipment according to claim 1 or 2, characterized in that a funnel (14) immersed in a water reservoir (3) is arranged under the crusher (4).   The ash discharge hopper (2) and the storage container (1) are hermetically connected, and the storage container (1) is provided with a pressure adjusting mechanism. Equipment as described in any one.   The storage container (1) is arranged to be movable on the rail (8) and is spaced from the work area (I) below the corresponding ash discharge hopper and its work area for maintenance. The equipment according to any one of claims 1 to 4, characterized in that it can move between the second point (II).   A separate containment container (1) with each ash discharge hopper (2) of the combustion facility equipped with a crusher (4) and a device (5) for transporting a suspension of fuel shells and water by water pressure The equipment according to claim 1, wherein the equipment is assigned to the equipment.   The separation device (6) has a shaking screen and the liquid cyclone (11) can be used to return the filtered liquid after separating fine solids back to the containing container (1). The equipment according to any one of claims 1 to 6, wherein   The shaking screen has two filter beds arranged side by side or one on top of each other, one of these filter beds comprising a coarse screen (10) and the other filter bed being a fine screen (10 ') And a recirculation device equipped with a pump for supplying the fluid passing through the mesh to the hydrocyclone (11) is connected to the shaking screen. The facility according to claim 7.   The hydrocyclone (11) divides the liquid flow into a substantially solid-free liquid flow (12) upstream of the cyclone and a suspension flow (13) taken out at the lower end of the hydrocyclone. The suspension stream (13) can be fed to the shaking screen, and the upstream of the cyclone is connected to the containment container (1). The facility according to claim 8.

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