JPH0240931B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a solid fuel transfer and containment device, and more particularly, to a solid fuel transfer system for metering a precise amount of fuel between a fuel source and a furnace, and at the same time dispensing with atmospheric pressure. It relates to a device for reliably sealing the air.

BACKGROUND OF THE INVENTION In large furnaces, such as those associated with steam generators, a number of burners extend around the furnace and fuel, such as coal material, is supplied from a single fuel source. is supplied. In this type of equipment, it is difficult to accurately meter the correct amount of coal to each burner and also to seal it from atmospheric pressure, i.e. to shut off air. Various methods have been devised in the past, but none are fully satisfactory in terms of both accurate measurement and sealing.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a closed solid fuel transfer device for metering and transferring a precise amount of fuel from a fuel source to a burner in a furnace. It's about doing.

Another object of the invention is to provide a device of the above type which provides reliable sealing against atmospheric pressure.

Yet another object of the invention is that it is simple to operate;
The object is to provide a device of the above type that is efficient to use and relatively inexpensive.

SUMMARY OF THE INVENTION In order to achieve the above and other objects, the solid fuel transfer enclosure of the present invention transfers material from an external fuel source to a discharge valve at one end and a discharge valve at the other end. A horizontal conveyor is provided for depositing onto a hopper portion of a transfer sealing device having a sealing portion. The amount of material in the hopper is sensed and a movable seal moves the material forward toward the discharge valve, which is opened at the appropriate time. After the material has been discharged into the discharge hopper, the closure device reverses its motion and returns to the opposite end of the device and the discharge gate or valve is closed before a new cycle begins. I am made to do so.

The foregoing general description of the invention, as well as other objects, features and advantages, will become more apparent from the detailed description of embodiments of the invention that follows with reference to the drawings.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 10 designates a housing 10 that is shaped to form an inlet transfer chamber 12 , a storage enclosure chamber 14 and an outlet transfer chamber 16 . A track 18 is supported on the floor 20 of the housing 10 and receives a closure device 22 which traverses the track in a manner to be described below.

An endless loop conveyor belt 24 connects the entrance conveyance chamber 1
2 and has an inlet end 24A disposed adjacent housing 10 and an outlet end 24B disposed within chamber 12. The conveyor belt 24 is
The solid material to be transported, such as coal, is transported through the chute 26.
and transports said material horizontally through chamber 12. The above materials are
It is discharged from the discharge end 24B of the conveyor 24, and the inlet opening 14 of the chamber 14 is discharged by its own weight as shown by the arrow.
Pass A downward and enter the latter room.

The chamber 14 has a discharge end 14B over which a discharge valve or gate 30 is pivoted on a top shaft or hinge 32 between a closed position shown in solid lines and an open position shown in dashed lines. and are adapted to be moved in the usual manner to seal and open the discharge ends 14B, respectively.

An inclined conveyor belt 34 is disposed within the chamber 16 and, together with a portion of the housing 10, forms a hopper 36 for receiving material to be transferred from the chamber 14, as described below. The conveyor belt 34 is
It has a lower inlet end 34a adjacent the hopper 36, and an upper discharge end 34b. The material thus passes through the chamber 16 via the conveyor belt 34 and then to a discharge chute 38 aligned with the chamber 14.
is discharged under its own weight to a furnace or the like (not shown).

The closure device 22 is shown in its inoperative position, in which its front end 22A forms one end of the chamber 14. The device 22 is adapted to move toward and away from the discharge opening 14B in a direction from right to left in the figure;
That movement, and the movement of valve 30, is controlled by three limit switches 4 attached to track 18 and responsive to the position of the device on the track, as described below.
0, 42 and 44.

The closure device 22 and valve 30 may be powered in any conventional manner, for example pneumatically actuated.

In operation, solid particles or shredded fuel material is conveyed to the upper surface of the inlet end 24A of the conveyor 24 via the discharge chute 26. The material traverses the length of the conveyor 24 and then falls from the discharge end 24B under its own weight. The fuel material then passes through the inlet opening 14A of the chamber 14, where it passes through the valve 30 and the end 22A of the closure device 22.
It accumulates in places between.

When a predetermined amount of fuel material has accumulated, a level limit switch or metering device (not shown) associated with conveyor belt 24 or chute 26 provides a signal to actuate closure system 22. This causes the device 22 to traverse the runway 18 in a right-to-left direction as viewed in the diagram, so that the device 22
4 is pushed towards the discharge opening 14B. The closure device 22 continues to move until it covers the opening 14A, at which point the limit switch 40 moves the valve 30 to its open position, shown in phantom. This causes the metered amount of fuel material to be discharged into the hopper 36 under its own weight. A conveyor belt 34 then conveys the metered amount of fuel in the hopper 36 to a chute 38 from where it is admitted to the furnace.

The sealing plug device 22 has its front end connected to the discharge opening 1.
It continues its forward movement until it extends a short distance past 4B, at which point a second limit switch 42 terminates further forward movement of the device for a short pause, and then stops the movement of the device until it extends a short distance. Direct it to the working position and then reverse it. During this return movement, as the device covers opening 14A, limit switch 40 begins to close valve 30, and limit switch 44 stops the reverse movement and transfers operation to the level limit switch or metering switch. . All of the circuitry described above can be incorporated and arranged within a fuel delivery system and boiler master control system to further control the operation of the system according to fuel supply and demand requirements.

When the bung device 22 is moved to cover the inlet opening 14A, it ensures a seal between the atmosphere and the hopper 36 and prevents the introduction of atmospheric air into the latter hopper;
That is, air is blocked. The apparatus also meters a precise amount of fuel material from the chute 26 to the hopper 36 and from the hopper to the chute 38. Further, in moving the sealing plug device 22, the discharge gate is opened and closed while the device 22 covers the opening 14A and continues the above-mentioned sealing.

EFFECTS OF THE INVENTION As can be seen from the foregoing, the fuel transfer sealing system of the present invention achieves the aforementioned benefits and operates efficiently and easily at relatively low cost.

Although the present invention has been described above with reference to its embodiments, various modifications, changes, and substitutions can be made within the spirit and scope of the present invention as described in the claims, and in some cases, the present invention may be modified. Certain features of the invention may be employed without corresponding use of other features.

[Brief explanation of drawings]

The figure is a longitudinal sectional view showing the fuel transfer sealing device of the present invention. 14... Sealed storage chamber, 14A... Inlet opening,
14B...Discharge opening, 22...Sealing plug device, 2
4... Conveyor belt, 30... Discharge valve, 34...
... Conveyor belt, 38 ... Discharge chute, 4
0, 42, 44...Limit switch.

Claims (1)

[Scope of Claims] 1. A source of solid fuel material, a sealed chamber having an inlet opening for receiving said fuel material and a discharge opening disposed at one end, and for opening and closing said discharge opening. and a closure device disposed at the other end of the chamber and forming one wall of the chamber, the closure device having an inlet opening, a discharge opening and a closure in the chamber. movable across the chamber to push the fuel material contained between the plug device and toward the discharge end, further comprising: a predetermined amount of the plug device toward the discharge opening; means for opening said valve means in response to movement of said valve means, said closure device being adapted to seal said inlet opening from said discharge opening during opening of said valve means. Solid fuel transfer sealed device. 2. In addition, receiving fuel materials from the source of the materials;
and a conveyor means for discharging said fuel material to the inlet opening. 3. The solid fuel transfer enclosure of claim 1 further comprising means for forming a hopper in communication with the discharge opening and conveyor means for transferring fuel material from said hopper means to a discharge chute. 4. The apparatus of claim 1 further comprising means for reversing movement of the closure device toward and away from the discharge end toward and away from the rest position in response to the closure device reaching the discharge end. Solid fuel transfer enclosure as described. 5. The solid fuel transfer closure device of claim 4 further comprising means for closing the valve means in response to movement of the closure device a predetermined amount toward the rest position. 6. The solid fuel transfer closure system of claim 5, wherein the sealing plug arrangement seals the inlet opening until the valve means is closed.