KR200249695Y1 - Combustion chamber of incinerator - Google Patents

Abstract

The present invention relates to a combustion chamber of an incinerator in which a heat resistant material is used and has a grate assembly fixed in a stepped manner to maximize combustion efficiency; Combustion chamber (2) having a grate assembly (28) and ignition burner (6) for sequentially transporting and combusting waste continuously introduced through the waste inlet (8), preheating for injecting preheated air into the combustion chamber An incinerator comprising an air supply means;

The grate assembly is composed of two or more grate 26 which is fixedly installed stepwise in the spaced apart up and down direction, and combustion product transfer means for transferring the residue after combustion mounted on the upper surface of each grate toward the combustion product discharge unit The grate 26 is a heat-resistant and fire-resistant ceramic material having a predetermined thickness from at least an upper surface, and a plurality of preheated air injection holes 48 are formed through the entire surface, and the preheated air supplied to the combustion chamber 2 is formed. It is characterized in that the nozzle means for high pressure injection through the preheating air injection hole (48) is installed.

Description

Combustion chamber of incinerator

The present invention relates to an incinerator for combusting wastes, and more particularly, to a combustion chamber of an incinerator for maximizing combustion efficiency by using a heat-resistant material and having a grate assembly fixedly fixed stepwise.

Various wastes that require incineration, such as food waste or industrial waste, are burned or recycled through incineration plants of a certain scale. One form of incineration plant for this purpose is illustrated by the schematic diagram of FIG. 1. As the main part of the present invention is a combustion chamber, other parts are weak and will be described and described.

The combustion chamber 102 having the stepped grate 100 has a structure in which waste 106 injected from the waste inlet 104 can be burned while sliding forward. An ignition burner 108 is installed at the front wall of the combustion chamber to ignite the flame toward the waste 106 placed on the grate. Waste heat generated from the combustion chamber may be separately taken out and utilized by the waste heat boiler 110. The air preheater 112 preheats the outside air using waste heat and supplies it to the combustion chamber along the line 114. The heated air is specifically injected directly from the grate, which is a means of supplying the oxygen necessary for the combustion process and a combustion aid for smooth combustion. It is also a means for cooling the grate.

The bottom ash, which remains after combustion, is discharged through the ash discharge port 116, and the fly ash is extracted through the filter along with the combustion air and then discharged to the outside along the reference line 118. Combustion air is purified through one or more purifiers 120 and then discharged through the stack 122 to the outside. Fly ash will also be discharged from the clarifier through attachment line 124.

The grate assembly composed of several grate 100 has a drive (not shown) for conveying the grate in the front-back direction. In addition, the grate is provided with a plurality of air injection holes in the upper surface to supply the combustion air into the combustion chamber.

Since the main points of the present invention are concentrated on the combustion chamber and the grate installed therein, the problem will be pointed out for the conventional grate. The grate has a grate drive for pushing down the combusted or combusted waste downwards. The grate drive allows each grate to frictionally contact each other and to move back and forth in the transverse direction.

As can be appreciated, the preheating air supplied to the combustion chamber can sufficiently perform the combustion auxiliary function as the temperature is high. However, the conventional grate has a limit to increase the temperature of the preheated air supplied because the material is a metal, such as heat-resistant chrome steel, the heat resistance temperature is 600 ℃ to 700 ℃. That is, the temperature of the combustion chamber is usually over 1000 ℃, according to the temperature of the conventional grate may be thermally deformed or damaged, so that cooling is required to maintain a certain low temperature to prevent the high temperature rise of the grate do. Therefore, the temperature of the preheated air supplied is usually limited to about 200 ° C in consideration of cooling of the grate. This limiting of the temperature of the preheated air makes it difficult to fully perform the function of assisting combustion.

In addition, according to the conventional grate structure, due to frictional contact between grates, the surface of the grate may be worn or the nozzle to which air is injected may block the preheating air supply. In addition, there is a problem in that the structure is complicated, repair and replacement is not easy.

The present invention for the above problems, the main purpose is to provide an incinerator that can easily burn high-function waste while increasing the combustion efficiency by increasing the temperature of the preheating air supplied between the grate. It is another object of the present invention to provide an incinerator which is simple in structure and easy to repair and replace, and prevents wear or damage of the grate due to high temperature. Another object of the present invention is to provide an incinerator which minimizes the failure rate of the apparatus and extends its life by providing a structure that does not drive the grate.

1 is a block diagram of a conventional incinerator.

2 is a side configuration diagram showing a configuration of a combustion chamber according to an embodiment of the present invention.

Figure 3 is a side configuration diagram of the grate according to an embodiment of the present invention.

4 is a plan view of the grate.

5 is a state diagram showing a driven state of the grate assembly.

Explanation of symbols on the main parts of the drawings

2 ; Combustion chamber 6; Ignition burner

8 ; Waste input 18,18 '; Hydraulic cylinder

26; Grate 30; Slider

32; Bucket 34; Slider drive

38; Carrier 40; Ceramic plate

42; Alloy steel plate 44; Preheating air chamber

46; Preheated air inlet 48; Preheated air injection hole 50 (50a); Spray nozzle

The above object is a combustion chamber having a grate assembly and an ignition burner for sequentially transporting and combusting waste continuously introduced through a waste input unit, an air injection unit for injecting air into the combustion chamber, and air supplied to the combustion chamber. An incinerator comprising an air preheating unit for preheating, a combustion product discharge unit for discharging ash and combustion gas remaining after combustion, and a purifying unit for purifying the combustion gas,

The grate assembly is composed of two or more grate which is fixedly installed stepwise in the spaced apart up and down direction, and the combustion product transfer means for transferring the residue after combustion placed on the upper surface of each grate toward the combustion product discharge,

At least the upper predetermined thickness of the grate is a refractory and heat-resistant ceramic material, and a plurality of preheating air injection holes are formed through the entire surface of the grate, and the preheating air is injected through the air preheating unit and the air injection unit. It is achieved by the combustion chamber of the incinerator, characterized in that nozzle means for injecting through the holes are provided.

According to a feature of the present invention, the combustion residue transfer means is installed in the spaced space between the grate, the slider is moved back and forth in the direction in which the grate is installed, connected to the slider to push the combustion residue placed on the grate It includes a bucket or bracket and a slider drive for driving the slider.

Hereinafter, with reference to the accompanying drawings in the specification will be described in more detail. 2 is a side configuration diagram showing a configuration of a combustion chamber according to an embodiment of the present invention. Figure 3 is a side configuration diagram of the grate according to an embodiment of the present invention. 4 is a plan view of the grate.

In the combustion chamber 2 which forms the combustion space by the refractory brick etc., the combustion gas discharge port 4 is provided in the front upward direction, and the ignition burner 6 is installed in the front side wall. The waste input unit 8 is provided at the rear upper portion of the combustion chamber 2 to supply a predetermined amount of waste into the combustion chamber by a series of input devices.

The waste injector includes an inlet door 10, an inlet door opening and closing device 12 for moving the inlet door up and down in a pulley manner, a hopper 14 for containing waste for combustion, and waste introduced through the hopper in the combustion chamber. And a feeder 16 for pushing and feeding inward. The feeder may be hydraulic by hydraulic cylinder 18, or may be mechanical using a motor. As shown in the figure, the roller 22 is fixedly mounted to the frame on the push rod 20 to move the pushing plate 24 in the front-rear direction.

The grate 26 is installed stepwise so as to be inclined from the rear to the front in the combustion chamber. Waste supplied by the waste input device is dried (if it contains a function) and burned through the grate. Grate 26 may be installed in two or more stages, which can be variously adjusted according to the manufacturing situation. Hereinafter, the grate assembly 28 including the grate and the combustion product conveying means. The combustion product conveying means is a means for conveying the combustion product placed on the upper surface of the grate toward the next grate.

According to a feature of the present invention, the grate 26 is fixedly installed in the combustion chamber 2, and the combustion product conveying means scrapes the upper surface of the grate in the forward and backward directions in a four-way method. To this end, the slider 30 is installed to be able to transfer in the front-rear direction, and a bucket or bracket (hereinafter referred to as a bucket) is fixed to the tip of the slider. The sliders 30 provided on each grate are movable together by the slider feeder 34. Since the slider 30 and the bucket 32 may be made of a metal similar to that of a conventional grate, cooling of the high temperature combustion chamber is required. Therefore, according to this embodiment, cooling air is supplied to the slider (and the bucket) through a process different from the preheating air supplied to the grate. Slider cooling air will be acceptable at room temperature. A blower or the like for supplying cooling air will be installed at the rear of the slider and the grate.

The slider drive 34 is as follows. A roller 22 'is fixed on the bottom frame 36 of the device, and a hydraulic cylinder 18' mounted rearward allows the slider carrier 38 to roll over the roller. It is an exercise device similar to the waste input device described above, whether hydraulic or mechanical.

The detailed structure of the grate will be described with reference to FIGS. 3 to 4. The grate is a three-layered layer structure in which the first layer, which is the upper layer, is a fire-resistant and heat-resistant ceramic plate 40, and the second layer is an alloy steel plate 42 such as SUS304 or stainless steel. The third layer is also where preheated air chamber 44 is supplied with heated air.

At least one inlet pipe 46 through which preheated air flows is installed at the side of the preheating air chamber 44. A plurality of injection holes 48 penetrating from the preheating air chamber to the upper layer of the grate are provided throughout the grate. Preheated air injection hole 48 is preferably provided as closely as possible. An injection nozzle 50 is provided in each of the preheated air injection holes. The injection nozzle 50 is a means for increasing the injection speed of air by narrowing the cross-sectional area of the outlet hole of the preheated air. The spray nozzles may also be of the alloy steel (SUS304 or SUS306) mentioned.

According to another embodiment of the present invention, the chamber 44 is provided with several partition walls 52. The partition wall 52 is a means for supplying air at a uniform flow rate to all the injection nozzles, and may be a support means for supporting the weight of the first and second layers constituting the grate.

Looking at one side of this embodiment, the preheated air injection nozzle 50a is installed at the tip of the grate in the direction of about 45 °. This is a means for satisfying the floating state of the combustion products placed on the grate upper surface or a means for smoothing the conveyance.

The operation by the configuration of the grate assembly described above and the combustion chamber including the same will be described with reference to the use state diagram of FIG. 5. FIG. 5 shows the driven state of the grate assembly, showing the state in which the slider transports the combustion product as it moves forward.

The preheated air that is strongly injected through the spray nozzles installed as closely as possible by the present invention causes the waste placed on the grate to be burned in a floating state from the grate. This is an important factor to increase the combustion efficiency. In addition, since the upper layer of the grate directly in contact with the flame is made of a heat-resistant and fire-resistant material, the feature of using preheated air of high temperature (300 ° C. or higher) is also an important factor to increase combustion efficiency.

According to the described configuration and operation, the waste introduced into the combustion chamber is supplied with high pressure and high temperature air while being placed on the grate. This will allow drying in a short time before burning for high moisture content waste such as food waste, and will also improve the combustion efficiency to a considerable extent.

In addition, there is no mutual frictional movement between the grate, less wear or failure of the grate of the fine structure improves the work efficiency.

Claims (5)

Combustion chamber (2) having a grate assembly (28) and ignition burner (6) for sequentially transporting and combusting waste continuously introduced through the waste inlet (8), preheating for injecting preheated air into the combustion chamber An incinerator comprising an air supply means; The grate assembly is composed of two or more grate 26 which is fixedly installed stepwise in the spaced apart in the vertical direction, and combustion product transfer means for transferring the residue after combustion mounted on the upper surface of each grate toward the combustion product discharge unit As, The grate 26 is a heat-resistant and fire-resistant ceramic material having a predetermined thickness from at least an upper surface, and a plurality of preheating air injection holes 48 are formed through the entire surface, and the preheating air supplied to the combustion chamber 2 is supplied to the preheating air. Combustion chamber of the incinerator, characterized in that the nozzle means for high pressure injection through the injection hole (48) is provided. The method of claim 1, wherein the combustion residue transfer means is installed in the spaced space between the grate 26, the slider 30 is moved back and forth in the direction in which the grate is installed, connected to the end of the slider and above the grate A bucket 32 which pushes out the loaded combustion residue, a carrier 38 for simultaneously activating the slider in a state of being mounted on a roller 22 'installed on a fixed frame, and driving the carrier 38 hydraulically or mechanically Combustion chamber of the incinerator, characterized in that it comprises a slider drive (34) for. 3. The combustion chamber of claim 2, wherein cooling means for cooling at least the slider (30) is provided below the grate or behind the combustion chamber. The method of claim 1, wherein the nozzle means is installed integrally on the bottom surface of each grate, the preheating air chamber 44 to which the heated air flows from the air preheating unit; And a preheating air injection nozzle (50) installed in the injection hole (48) for high-pressure injection of preheated air introduced into the chamber to the upper portion of the grate. 5. The combustion chamber of claim 4, wherein the preheating air injection nozzle (50a) installed at the tip of the grate among the preheating air injection nozzles is inclined at about 45 degrees toward the front of the combustion chamber.