JP3899066B2 - Waste and sludge furnace interior charging method and charging equipment - Google Patents

Description

  The present invention relates to a waste and sludge furnace interior charging method and a charging apparatus in which sludge is uniformly dispersed in waste in a waste melting furnace and charged into the waste melting furnace.

  In the waste melting treatment, in many cases, waste sewage sludge and sewage sludge dehydrated to 75 to 90% of moisture and added to waste in the waste melting furnace are treated. Yes.

  FIG. 3 is a schematic view showing a state in which conventional waste and sludge are charged into a waste melting furnace.

  In FIG. 3, a method is adopted in which the waste 1 is introduced into the input hopper 4 of the waste melting furnace 3 by the waste bucket 2, and the sludge 5 is input to the input hopper 4 by a dedicated sludge bucket 6 different from the waste 1. A method has been used in which the garbage 1 is charged in several batches, or the sludge bucket 6 is collided with the charging hopper 4 and dispersed. However, the sludge 5 has a high moisture content and poor air permeability. In the above charging method, the sludge 5 does not disperse in the furnace but exists as a single lump and cannot be completely dispersed in the furnace. There was a problem that nonuniformity of the combustion state was caused and the operation of the furnace was adversely affected.

  Moreover, in the sludge treatment, as a method for dispersing sludge, Patent Document 1 discloses a method for dispersing sludge introduced in a dispersed state while causing hydrated sludge to be ejected from the pipe end of the sludge introduction pipe into the cement kiln. Are listed.

In Patent Document 2, sludge is supplied into a casing from a plurality of supply ports formed at intervals in the circumferential direction of the casing, and sludge is cut and dispersed with a screw cutter disposed in the casing. A cutting and dispersing device is described.
JP-A-11-92184 JP 11-270825 A

  Assuming, for example, the case where sludge is sprayed on the waste surface in the waste melting furnace by the dispersion method described in Patent Document 1, the sludge is layered on the waste surface without being mixed with the waste to form a regrouped sludge layer. As a result, the air permeability deteriorates, and the drying / combustion state in the furnace deteriorates. In addition, when the dispersing device is stopped, there is a problem that the sludge is dried and solidified by heat in the furnace and cannot be reactivated.

  Moreover, in patent document 2, when sludge is sent directly in a furnace, since waste is batch-charged, even if a sludge dispersion | distribution apparatus is used, sludge will concentrate on one place and will become a dry defect.

  As described above, none of the dispersion methods can achieve complete in-furnace dispersion of sludge, which is often the main cause of furnace malfunction.

  Therefore, the present invention provides a method for charging waste and sludge into the furnace and a charging device that can uniformly disperse the sludge in the waste and charge it into the waste melting furnace.

  The present invention relates to a waste and sludge mixing method in which waste and sludge are mixed and introduced into a waste melting furnace, on a waste transporting conveyor for transferring the waste to be charged to a charging hopper of the waste melting furnace. The sludge is pumped to a sludge extrusion device provided at the tip of the pressure feed pipe via a pressure feed pump and a pressure feed pipe, and the sludge pushed out by the sludge push-out device is being transferred to the waste transport conveyor. It is characterized in that it is dropped onto the upper surface of the garbage and dispersed and loaded, and then put into the furnace interior hopper together with the garbage.

  In addition, the waste and sludge furnace interior charging device of the present invention is a sludge extrusion system in which a piston operated by a drive cylinder is provided above a waste transport conveyor for transferring waste to be charged to a furnace interior entrance hopper of a waste melting furnace. A slit nozzle divided into a plurality of parts is formed at the lower end of the sludge extrusion apparatus, a nozzle outlet valve is provided on the slit nozzle to form a sludge extrusion section, and the sludge extrusion apparatus has a trunk section. Is connected to a sludge pressure feed pipe having a sludge inlet valve, and further, the extruded sludge formed by stretching a plurality of wire cutters on the body of the rotating body below the push-out portion to a predetermined size. A wire cutting device for cutting is provided. Furthermore, if a core that uniformly disperses the pressing force of the sludge at the slit nozzle portion when the piston is lowered is disposed in the sludge containing cylinder, uniform extrusion in the longitudinal direction of the slit can be obtained.

  In the present invention, garbage refers to wastes excluding sludge.

  It is possible to avoid the concentration of sludge by loading the waste on the waste transport conveyor before putting it into the furnace and dispersing and loading the sludge into small pieces on the waste in the process of moving to the input hopper. The sludge is evenly dispersed in the furnace, and the furnace operation is stabilized.

  Moreover, by using a porous nozzle and a wire cutter, sludge can be reduced in size without requiring compressed air.

FIG. 1 is a schematic view showing the entire waste and sludge charging device of the present invention. In FIG. 1, the waste 1 to be treated is not directly fed into the charging hopper 4 of the waste melting furnace 3, but is temporarily placed on the waste transporting conveyor 7 for transferring the waste to the charging hopper 4 of the waste melting furnace 1. To load.
On the other hand, the sludge 5 dehydrated to a water content of about 75 to 90% is supplied from the sludge receiving hopper 8 to the sludge extrusion device 11 disposed above the waste melting furnace 1 by the pressure feed pump 9 through the pressure feed pipe 10. To do.

  FIG. 2A is a schematic diagram showing the side of the sludge extrusion device and the wire cutting device, FIG. 2B is a plan view of the slit nozzle, and FIG. 2C is a diagram showing a state where sludge is supplied to the sludge extrusion device. d) It is a figure which shows the state which extrudes sludge and is fragmented.

  The sludge extruding device 11 is a cylinder piston type in which a piston 13 that moves up and down by a drive cylinder 12 is built. In addition, the core 21 may be disposed in the sludge extruding device 11 so as to disperse the sludge pressing force when the piston 13 is lowered and to be uniformly extruded.

  A slit nozzle 15 in which a plurality of holes 14 are formed by dividing into a plurality of holes is formed at the lower end of the sludge extruding device 11, and a nozzle outlet valve 17 that opens and closes the holes 14 by being driven by a drive cylinder 16. To form an extruded portion of sludge. A sludge pumping pipe 10 having a sludge inlet valve 18 is connected to the body of the sludge extruder 11.

  A wire cutting device 19 is disposed below the extrusion portion of the sludge extrusion device 11. The wire cutting device 19 is formed by stretching a plurality of wire cutters 20 on the body of a rotating body that is rotated by a motor M, and the extruded bar-shaped sludge is cut into a predetermined size by the wire cutter 20.

  Next, a method for charging garbage and sludge will be described.

  1 and 2, the nozzle outlet valve 17 of the sludge extrusion device 11 is closed, the sludge inlet valve 18 is opened, the pressure feed pump 9 is activated, and the sludge 5 is transferred from the sludge receiving hopper 8 to the sludge extrusion device 11 by the pressure feed tube 10. Transport and fill. At the time of filling, the piston 13 in the sludge extrusion device 11 is pushed up by the filling pressure of the sludge 5, the top dead center is detected, the filling of the sludge 5 is stopped, the sludge inlet valve 18 is closed, and the supply of the sludge 5 is stopped. .

  The wire cutting device 19 is activated in accordance with the operation of the dust charging conveyor 7, and the sludge extrusion device 11 opens the nozzle outlet valve 17 while keeping the sludge inlet valve 18 closed, and drives the piston 13 with the drive cylinder 12. To lower. The sludge 5 is pressed by the lowering of the piston 13 and pushed out from the many holes 14 of the slit nozzle 15 into a rod shape. The sludge 5 is cut into pieces by turning the wire cutter 20 of the wire cutting device 19 and is cut into pieces. The sludge 5 is dropped onto the moving waste 1 by the waste charging conveyor 7 and is dispersed and loaded to be mixed uniformly. As a result, the sludge 5 is dispersed on the surface of the waste 1 without being collected.

  The sludge 5 is distributed and stacked on the surface of the waste 1 in accordance with the timing when the waste 1 on the waste loading conveyor 7 is sent toward the input hopper 4. Moreover, the supply of the sludge 5 to the sludge extrusion apparatus 11 is filled during the charging waiting time with sufficient time.

It is the schematic which shows the whole charging device of the refuse and sludge of this invention. (A) is the schematic which shows the side of a sludge extrusion apparatus and a wire cutting apparatus, (b) is a top view of a slit nozzle, (c) is a figure which shows the state which is supplying the sludge to a sludge extrusion apparatus, (d) FIG. 2 is a view showing a state where sludge is pushed out into small pieces. It is the schematic which shows the state which charges the conventional waste and sludge to a waste melting furnace.

Explanation of symbols

1: Waste 2: Waste bucket 3: Waste melting furnace 4: Input hopper 5: Sludge 6: Sludge bucket 7: Waste transport conveyor 8: Sludge receiving hopper 9: Pressure pump 10: Pressure piping 11: Sludge extrusion device 12: Drive cylinder
13: Piston 14: Hole 15: Slit nozzle 16: Drive cylinder 17: Nozzle outlet valve 18: Sludge inlet valve 19: Wire cut device 20: Wire

Claims (3)

In the method of entering the waste and sludge into the furnace, mixing the waste and sludge into the waste melting furnace,
Load the waste to be thrown onto the waste conveyor to transfer it to the waste hopper input hopper,
The sludge is pumped to the sludge extrusion device provided at the tip of the pumping pipe via the pump and pump.
The sludge extruded by the sludge extruding device is dropped onto the upper surface of the waste being transported loaded on the waste transporting conveyor, dispersed and loaded, and put together with the waste into a furnace-filled hopper. How to enter the furnace interior.   A sludge extruder equipped with a piston that is actuated by a drive cylinder is disposed above the waste transport conveyor that transfers the waste to be fed to the furnace hopper inside the waste melting furnace, and a plurality of sludge extruders are installed at the lower end of the sludge extruder. Forming a slit nozzle divided into a nozzle outlet valve to the slit nozzle to form a sludge extrusion part, and connecting the sludge pressure feed pipe having a sludge inlet valve to the body part of the sludge extrusion apparatus, In addition, the waste is provided with a wire cutting device that is formed by stretching a plurality of wire cutters on the body of the rotating body below the push-out portion and cuts the extruded sludge to a predetermined size. And sludge furnace interior equipment.   3. The waste and sludge furnace interior entry device according to claim 2, wherein a core for uniformly dispersing the sludge pressing force at the nozzle portion when the piston is lowered is disposed in the sludge containing cylinder.

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