KR100527243B1 - Method for incineration of industrial and household waste and sludge - Google Patents

Abstract

Generally vertically oriented waste internal feed chute 1, waste internal feed means at the bottom of the chute 1 which generally advances waste horizontally, and possibly internal feed outlets and downstream position combustion chambers 3 An industrial and household waste and sludge incineration plant, comprising: at least one internal feed tube (4) for adding sludge to the chute (1) or waste in the outlet, and at least one internal waste chute (1) One or more pressure supplies 8 for supplying sludge through the feed tube 4 are provided. The sludge is properly supplied to the plant via a sealed closed supply system.

The present invention provides minimization of odor problems and optimization of hygienic working conditions.

Description

Incineration of industrial and household waste and sludge {METHOD FOR INCINERATION OF INDUSTRIAL AND HOUSEHOLD WASTE AND SLUDGE}

The present invention generally provides an internal feed through a vertically oriented waste chute, and a waste feed means at the bottom of the chute, which generally advances waste horizontally, possibly with an internal feed outlet and downstream location combustion. A method for incineration of industrial and household waste and sludge with mixed materials consisting of chambers, wherein the waste in the combustion chamber is advanced, dried and ignited before slag is transported from the combustion chamber to the slag chute. And a moving great system at the bottom for combustion, combustion and external combustion.

The waste inward chute is generally oriented vertically to allow the waste to slide downward through the chute by gravity, while the waste inward means at the bottom of the chute, through the internal supply outlets, allow the waste to be placed on the bottom of the combustion chamber. After removal, it is fed forward.

U.S. Patent No. 4,494,469 and Danish Patent No. 170,493 disclose one or more hydraulic pistons, an apron feeder, and a moving grate or actual combustion grate as known waste intake means at the bottom of the waste intake chute. have. This waste internal supply means that a fully filled garbage bag and the same volume of waste act as a relatively compact plug, passing downwards through the waste internal supply chute, and along the waste only a small amount of combustion air. After securing to the combustion chamber and avoiding the propagation of combustion back into the waste internal supply chute, it is supplied through the internal supply outlet without being easily sorted into the combustion chamber.

In an oven system, the present invention relates to an oven system that is secured by placing an induction draft pan for flue gas directly in front of a chimney of an incineration plant, where combustion occurs in an oven chamber at a pressure lower than atmospheric pressure.

Sludge from wastewater cleaning plants has already been widely disposed of as manure, which is disposed of by combustion, but, like many other liquid wastes, this type of sludge also requires strict environmental regulations.

Special sludge ovens for the combustion of waste water sludge are known, but require the supply of supplemental fuel in the form of oil or gas.

Combustion of wastewater sludge combined with other wastes in the waste incineration plant is known, in which the sludge is continuously fed by internal feeding directly to the hot combustion chamber through its ceiling or through the waste inlet chute to the top of the chute. The former internal supply method is relatively cumbersome due to the internal supply outlet in the ceiling of a very hot oven and the flaps or nozzles, both of which are associated with the internal supply of sludge, resulting in odor problems and unsanitary working conditions.

U.S. Patent No. 4,724,776 uses a powered filling screw or powered conveyor to force waste and sludge through the walls of the oven into a hot combustion chamber, where the waste and sludge are placed on a combustion great bed located above the floor in the combustion chamber. Falling off is disclosed. This aims to combust the waste and the sludge by a method aimed at good gas combustion at the same time before the flue gas reaches the chimney. However, no mention is made of the elimination of odor and unsanitary problems, and the finished oven system described is also an overpressure system, in addition to the odor and unsanitary problems, as well as the leakage of incompletely burned flue gas into the surrounding or working environment where the plant is working individually. Add dust. Moreover, the internal feed screw means must apply cumbersome, expensive and unsanitary grinding to the waste before feeding it to the combustion chamber.

When the sludge is fed directly into the waste combustion chamber through the ceiling or wall of the oven, the sludge is dried through a gas stream at approximately 1000 ° C temperature, which sweeps up numerous fine sludge particles, which significantly increases the amount of dust in the flue gas. This is inconvenient, and the boiler after the combustion oven becomes more dirty and the demand for cleaning of the flue gas is increased.

Japanese Patent No. 1,305,214 discloses a waste incineration plant having a sludge inlet opening in a waste inlet chute, and providing an injection apparatus located in a waste inlet chute for dispersing and injecting sewage sludge into the sludge inlet opening. have. This device used to deliver the sludge to the injection device is a piped sludge pump, the sole purpose of which is specified as the injection device is to distribute the sludge evenly across the waste bed, so that a constant mixture between the sewage sludge and the waste is obtained. For example, sludge with a water content of about 70-80% is obtained by a number of inlet openings and the same number of ball valves or injection pistons which are automatically or manually controlled.

These known techniques are not aimed at odor and dust problems, unsanitary working conditions, other work environment problems and occupational health issues, but also waste silos with municipal and industrial waste on conventional waste incinerator plants. It is not aimed at controlled mixing with sludge of other waste materials that cannot be easily introduced into the furnace.

It is an object of the present invention to minimize odor problems as mentioned at the beginning of this specification, to optimize unsanitary working conditions, and to ensure that other waste materials that cannot be supplied with industrial and household waste can be transferred to the waste incinerator in an advantageous manner. It is to provide a waste incineration plant which can be prepared by adding other sludge material to the sludge prior to adding the sludge, by a method such as that mentioned in the introduction of this specification, which uses sludge as a carrier for the waste material added. Sludge with additional waste material added is fed to a waste internal feed chute or internal feed outlet located at a pressure lower than atmospheric pressure, the plant is operated so that unsanitary dust is sucked into the cooling waste, and odorous substances are burned. It is sucked into the chamber, burned and removed. At the same time, as the sludge with other added waste material is fed into the combustion chamber, the development of dust during the combustion process is minimized, and the internal supply of waste is a cumbersome aspect of waste, costly and unsanitary pollution. It is optimally carried out for combustion. The internal feed is preferably carried out in the bottom of the waste internal feed chute or inside the internal feed outlet.

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By providing an internal feed tube for sludge in the wall of the waste internal feed chute facing the combustion chamber or in the ceiling of the internal feed outlet, the sludge is always fed into the waste combustion chamber and on top of the waste to be dried immediately before entering the combustion chamber. Is located.

The plurality of internal feed tubes are each evenly distributed over the width of the waste internal supply chute or outlet so that sludge is evenly distributed in the waste.

Sludge is pulled into the waste through the chute or outlet, clogging at the mouth of the internal feed tube or tubes, as each has an internal feed tube that slopes downwardly to the waste internal supply chute or outflows forward to the outlet. Will be avoided.

The internal feed tube or tubes are preferably connected to a pipeline for supplying sludge from upstream of a pressure supply connected to a silo for temporary storage of sludge to avoid odor problems. Thus, the internal supply of the sludge is carried out in a closed and almost sealed manner.

One or more ring nozzles are provided in the sludge supply pipeline to transport the sludge by a greater distance in association with a relatively high volume of dry sludge of 30-40%. These nozzles lubricate the inner wall of the pipeline with a polymer to reduce the sliding friction between the sludge and the pipeline.

The sludge to be incinerated in the plant according to the invention is selected from the group consisting of sludge from wastewater waste, crude sludge, petrochemical waste, animal sludge, liquid wastewater, sludge and sludge from liquid fertilizers or mixtures thereof. , Great screening, boiler ash, filter ash, flue gas waste, other wastes from waste incineration plants, shredded waste, plastic waste, automotive fluff and stabilizers to reduce dust and / or steam generation And / or a mixture selected from the group consisting of undesired combustion chambers.

Many other wastes are treated in this way. By proper synthesis of the sludge and the mixture, it is possible to achieve stability against dust, steam, chemical reactivity, viscosity of the mixture and the like.

As the pipelines flow through a manifold to a separate internal feed tube or a common internal feed tube, providing a plurality of separate pressure supply and pipelines for supplying the sludge of the different mixtures, thereby providing the internals for the different mixtures. Since it is possible to adjust the feed rate, the combustion in the combustion chamber is controlled. This control reacts relatively quickly because the internal supply of sludge is located very close to the combustion process in the combustion chamber.

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The sludge is preferably fed to the incineration plant via a sealed closed supply system.

The internal supply of sludge is used as a variable to control the combustion of the waste in the combustion chamber. In the process of the present invention, it is preferred that the sludge mixture consists of a pressure supply process of the sludge which changes the composition of the mixture to be treated or of a substance which provides stability of the sludge mixture.

The advantages of the method according to the invention correspond to the advantages described above in connection with the incineration plant according to the invention. In the following description, the invention shows an embodiment of the incineration plant according to the invention shown in the accompanying drawings. Described in detail with reference to, the method according to the invention is carried out as shown in the figure.

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1 shows an incineration plant consisting of an internal feed tube for adding sludge to rubbish according to the invention,

Figure 2 is a block diagram consisting of four internal supply tube through the manifold connected to the sludge supply pipeline,

3 is a schematic view of a plant consisting of a waste incineration plant and a corresponding sludge pipeline and a pressure supply device provided for transporting the sludge and silos for the temporary storage of the sludge.

The incineration plant shown in FIG. 1 is located in the waste internal supply chute 1 for industrial and household waste, and downstream of the chute 1, advancing waste through the inlet to the combustion chamber, and the waste in the combustion chamber 3 It consists of a great system (2) for advancing. The waste internal supply chute 1 consists of an internal supply tube 4 for sludge supply. In the illustrated embodiment, the internal feed tube 4 is located adjacent the bottom of the waste internal feed chute 1 and within the wall in the waste internal feed chute 1 facing the combustion chamber 3.

Thus, the sludge supplied to the waste incineration plant shown through the internal feed tube 4 is placed on top of industrial and household waste on the great system 2 in the combustion chamber 3.

In order to avoid the problem that the waste internal supply chute 1 is clogged during the internal supply of the sludge, the sludge supply internal supply tube 4 as shown in the drawing is discharged at an angle inclined downwardly to the waste internal supply chute 1. Is located.

FIG. 2 shows four internal feed tubes 4 in the sludge supply pipeline 5 via a manifold 6 providing a uniform distribution of the sludge added across the four internal feed tubes 4. The sludge is distributed evenly across the feed direction to the great system 2 in the waste combustion chamber 3.

3 shows how the sludge is supplied from the storage silo 7 for temporary storage of the sludge towards the internal feed tube 4 in the sealed closure system. The pressure supply device 8 between the silo 7 and the internal feed tube 4 is provided adjacent to the silo 7, and the pipeline 5 is connected between the pressure supply device 8 and the internal supply tube 4. Is connected to. The pipeline 5 consists of a ring nozzle 9 which lubricates the inner wall of the pipeline 5 with a polymer which reduces the sliding friction between the sludge and the pipeline 5.

Claims (13)

In a method for incineration of industrial and household waste and sludge in an incineration plant, a) means for advancing the waste generally in the horizontal direction on the floor, including but not necessarily supplying industrial and household waste through a generally vertically oriented waste feed chute (1) with outlets formed at the bottom, After the waste passes through the supply chute and the outlet, a movable great system is introduced into the combustion chamber (3) at the bottom and dried, ignited, combusted, and externally burned while moving forward; b) said feed chute 1 or outlet (if any) connected to a pipeline 5 for supplying sludge in a pressure supply device 8 upstream connected to receive sludge from silos for temporary storage of sludge; Adding sludge to be incinerated through at least one feed tube (4) in communication with the furnace; c) a method of incineration, further comprising the step of adding to the sludge another substance to be further treated before sludge is added to the waste in the feed chute 1 or outlet (if present). And sludge incineration method. The method of claim 1, The additional materials to be treated include: great screening, boiler ash, filter ash, flue gas waste, other waste from waste incineration plants, shredded waste, plastic waste, automotive fluff, dust reduction. And a stabilizer for reducing steam generation, a stabilizer for reducing unnecessary chemical reactants in the combustion chamber (3), or a mixture thereof. The method according to claim 1 or 2, The sludge is selected from the group consisting of sludge from wastewater waste, crude oil sludge, petrochemical waste, animal sludge, liquid wastewater, sludge and liquid fertilizer or mixtures thereof, and a method for incineration of industrial and household waste and sludge. . The method according to claim 1 or 2, d) lubricating the inner wall of the sludge supply pipeline 5 using one or more ring nozzles 9 to add a lubricating medium, i.e. a polymer, to reduce the sliding friction between the sludge and the pipeline 5 Incineration method of industrial and household waste and sludge, comprising. delete delete delete delete delete delete delete delete delete