KR100228883B1 - High viscosity sludge feeding method and device for fluid incinerator - Google Patents

Abstract

The present invention relates to a method and a device for supplying high viscosity sludge for a fluidized bed combustor, in particular, in the supply of high viscosity sludge to a combustion furnace using a monopump, preventing clogging due to carbonization of the sludge at the front end nozzle of the feeder and The present invention relates to a sludge supply method and apparatus for injecting a compressive fluid (Steam, Compressor air, etc.) and adjusting the length of a nozzle for adjusting the size of the sludge in order to evenly introduce the sludge and to a desired position.

Description

High viscosity sludge supply method for fluidized bed combustion furnace and apparatus therefor

The present invention relates to a method and a device for supplying high viscosity sludge for a fluidized bed combustor, in particular, in the supply of high viscosity sludge to a combustion furnace using a monopump, preventing clogging due to carbonization of sludge at the feeder front end nozzle and burning The present invention relates to a sludge supply method and apparatus for injecting a compressive fluid (Steam, Compressor air, etc.) and adjusting a nozzle length for adjusting the size of the sludge in order to evenly introduce sludge into a furnace and a desired position thereof.

In general, a fluidized bed combustor fills sand or layered material in a fluidized bed and installs a plurality of spray nozzles of a certain size at the bottom of the container to introduce air, and sand in the container flows by air. It is a combustion device that uses a gas burner or oil burner to preheat the sludge to a temperature where it can burn, and then injects the sludge into the container for combustion.

In the fluidized bed incinerator as described above, stable and quantitative supply of target wastes during the combustion of the waste fluid using the fluidized bed is a very important factor.

In the case of solid sludge, screw feeder, rotary feeder, belt conveyor, etc. are used.In case of liquid sludge, a combustion furnace is introduced through the injection nozzle using a pump or the like. Put it in.

However, in the case of highly tacky oil-based sludge or dewatered sludge, it has an intermediate property between powder and liquid, so it is smooth due to bridge phenomenon at the hopper outlet where sludge is supplied or clogging in the supply pipe due to evaporation of water and volatile matter. There is a problem that it is difficult to supply the sludge.

Therefore, in the case of the strong adhesive oil component sludge or dewatered sludge as described above, it is common to use a monopump capable of quantitatively supplying the sludge when supplying sludge than a conventional screw or centrifugal pump.

4 shows an example of such a conventional method. The operation and effects of the conventional method are as follows.

As shown in FIG. 4, the sludge 13 pumped at a high discharge pressure by the monopump 1 connected to the lower end of the hopper passes through the sludge supply pipe 2 and is supplied with the sludge supply nozzle attached to the combustion board freeboard 8. Through 10) it is put into the furnace.

In this case, the moving speed of the sludge supplied by the monopump 1 is generally in the range of 0.2-0.5 m / s, and there is a problem that the feeding speed is slow.

Therefore, in the case of the highly viscous sludge as described above, in the sludge supply nozzle 10 connected to the combustion furnace, blockage occurs in the pipe due to carbonization due to evaporation of water and volatile matter of the sludge, and the sludge cannot be introduced into the center of the bed. The large amount is concentrated in the vicinity of the supply pipe, and the problems such as inhibition of fluidization and local overheating on the wall of the layer cause the combustion efficiency to be lowered and operation disturbance. In order to increase the cost, the investment cost is increased by installing the multistage mono pump.

Meanwhile, in the case of liquid materials such as waste oil or solvent, a liquid pump 12 is used to inject a liquid material into the incinerator through the injection nozzle as in FIG. 5, but in the case of sludge, a mono pump ( In addition to the slow supply of sludge by 1), the sludge contains a large amount of impurities in the form of particles, and there is a problem that the use of the liquid injection nozzle is impossible because the particulate matter blocks the nozzle of a complicated structure.

An object of the present invention for solving the above problems is to supply a high-function, high-viscosity sludge into the combustion furnace, carbonization furnace sludge supply pipe by the evaporation of water and volatile matter in the supply pipe and the supply nozzle attached to the combustion furnace or By supplying the supply nozzle into the combustion furnace continuously and quantitatively without clogging or jamming, it provides a sludge supply method that can reduce the cost of operation stop and repair caused by the supply failure of the sludge and increase the combustion efficiency.

The object of the present invention as described above is to supply a small amount of the atomizing compressive fluid through the compressive fluid supply nozzle when the high viscosity (high function) sludge supplied through the mono pump is supplied into the combustion furnace through the sludge supply pipe to the sludge supply nozzle. Compression fluid (Steam, Compressor air, etc.) injected from the supply nozzle to improve the flow of the sludge to prevent carbonization and clogging of the supply pipe and the supply nozzle attached to the combustion furnace by evaporation of water and volatile matter of the sludge It is achieved by providing a high viscosity sludge supply method for a fluidized bed combustion furnace.

Still another object of the present invention is to supply a high-function, high-viscosity sludge into a combustion furnace, where the carbonization furnace sludge supply pipe or supply nozzle is clogged or jammed by evaporation of water and volatile matter in the supply pipe and the supply nozzle attached to the combustion furnace. By supplying continuously and quantitatively into the combustion furnace, it is possible to provide a sludge supply device that can reduce the cost of operation stop and repair caused by sludge supply failure and increase combustion efficiency.

The object of the present invention as described above is a preheated sand in the combustion furnace layer after the high viscosity (high function) sludge is dropped into the combustion furnace through the sludge supply nozzle by the sludge supply apparatus consisting of a sludge supply pipe and a sludge supply nozzle connected to the mono pump. A sludge feeder of a fluidized bed incinerator mixed with bed material, the sludge feeder comprising: a compressive fluid supply device to the sludge feeder; A compressive fluid supply nozzle configured to eject the compressive fluid from the compressible fluid supply device; It is achieved by providing a high viscosity sludge supply device for a fluidized bed combustion furnace, characterized in that it is equipped with a valve that adjusts according to the pressure of the pressure gauge.

Another object of the present invention is to evenly add the sludge spatially even mixing in the bed to reduce the deviation of the bed temperature distribution and to suppress the generation of pollutants, the reduction of pollutants contained in the exhaust gas of the after-treatment equipment It is to provide a sludge supply method to reduce the cost.

An object of the present invention as described above is to adjust the valve according to the pressure of the pressure gauge, or to the sludge supply nozzle when the high viscosity (high function) sludge supplied through the mono pump is supplied into the combustion furnace through the sludge supply pipe to the sludge supply nozzle By providing a highly viscous sludge supply method for a fluidized bed combustor, by varying the length of the compressive fluid supply nozzle for injecting the compressive fluid, the pressure of the compressive fluid can be changed and the sludge of the appropriate size can be scattered in the combustion furnace. Is achieved.

1 is a cross-sectional view showing an embodiment of the present invention.

2 is a plan view showing the sludge combustion furnace dropping position in the sectional view taken along the line I-I of FIG.

3 is an exemplary view showing an embodiment of sludge sprayed on the cross-sectional view taken along line I-I of FIG.

4 is a cross-sectional view showing a conventional embodiment.

5 is a cross-sectional view showing an embodiment of a conventional liquid supply nozzle.

* Explanation of symbols for main parts of the drawings

1: Mono Pump 2: Sludge Supply Pipe

3: Compressor fluid (Steam, Compressor air, etc.) supply device

4: Supply nozzle for compressible fluid (Steam, Compressor air, etc.)

5: valve 6: pressure gauge

7: combustion furnace wall 8: combustion furnace freeboard

9: combustion furnace bed 10: sludge supply nozzle

11: sludge dropping point 12: liquid flow pump

13: sludge 14: sludge supply apparatus

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 shows a sludge supply apparatus according to the present invention, the sludge supply apparatus 14 is connected to the inside of the incinerator through the sludge supply pipe 2 and the sludge supply nozzle 10 connected to the monopump 1. In addition, the compressive fluid (Steam, Compressor air, etc.) improves the flow of the sludge to prevent carbonization due to evaporation of water and volatile components of the sludge.

1000

가 되도록 조절함으로써 슬러지의 연소로내 투입크기를 조절하고 압력계(6)의 압력에 따라 밸브(5)를 압축성유체에 작용하는 압력을 0

5

/

으로 조절하여 노벽에서부터 슬러지의 낙하지점을 조절한다.Then, the length of the compressive fluid supply nozzle 4 is zero in the reverse direction of the sludge flow at the end of the sludge supply nozzle 10.

1000

By adjusting the pressure of the sludge into the combustion furnace and adjusting the pressure of the valve 5 to the compressive fluid according to the pressure of the pressure gauge 6.

5

Of

To adjust the falling point of the sludge from the furnace wall.

At this time, the dropping point of the sludge due to the increase in pressure is a, b, c, d, e, f, the distance from the furnace wall 7 gradually increases to A, B, C, D, E, F.

, 길이는 1500

, 압축성 유체 공급노즐(4)은 직경 6

, 길이 10

로 연결하여 오일성분 슬러지 150

/hr를 투입하였을 때의 연소로벽(7)에서 거리를 실험한 결과를 표 1에 나타내었다.As an example, the sludge supply nozzle (10) has a diameter of 50

, Length is 1500

, The compressive fluid supply nozzle 4 has a diameter of 6

, Length 10

Oil-containing sludge

Table 1 shows the results of experimenting with the distance from the furnace wall (7) when / hr was added.

And the particle size of the sludge can be adjusted according to the length of the "L" display portion, and if the length of the "L" display portion is lengthened, the particle size of the sludge becomes small and can be operated to be sprayed like the "g" display portion of FIG.

Therefore, if the pressure is adjusted by operating the length of the "L" indicator and the valve, the sludge dropping point and the sludge particle size are put into the desired size, thereby preventing the sludge from being injected locally around the supply pipe. By dispersing into sludge particles, continuous and smooth supply is possible.

And the combustion efficiency can be increased because it is easy to adjust to the optimum injection position according to the number of supply nozzles.

FIG. 2 is a cross-sectional view showing the sludge furnace drop position by the section line I-I of FIG. 1 showing the dropping point 11 of the layer part 9 in the furnace in two and four cases.

The present invention as described above, by injecting a compressive fluid (Steam, Compressor air, etc.) to prevent the carbonization phenomenon in the supply pipe in advance and to control the amount and pressure of the atomizing compressible fluid to control the drop surface position and the particle size of the sludge Therefore, it is possible to achieve stable and quantitative supply in the furnace by preventing local input into the furnace, thereby improving the combustion efficiency and reducing the cost of stopping and repairing due to obstacles.

Claims (4)

When the high viscosity (high function) sludge 13 supplied through the monopump 1 is supplied into the combustion furnace freeboard 8 through the sludge supply nozzle 10 via the sludge supply pipe 2, the compressive fluid supply device In (3), the highly fluidized sludge for fluidized bed combustion furnace is characterized in that the compressed fluid supply nozzle 4 is mounted inside the sludge supply nozzle 10 so as to supply a small amount of compressed fluid for atomization to improve the flow of sludge. Supply method. According to the pressure of the pressure gauge 6, the pressure applied to the compressive fluid by the valve 5 is zero.

5

Of

To adjust the dropping point of the sludge from the furnace wall and adjust the length of the compressive fluid supply nozzle 4 for injecting the compressive fluid to the direction of sludge flow at the end of the sludge supply nozzle 10.

1000

High viscosity sludge supply method for a fluidized bed combustor, characterized in that to adjust the input size of the sludge in the furnace. The sludge supply pipe (2) connected to the monopump (1) and the sludge supply device (10) consisting of the sludge supply nozzle (10), the high viscosity (high function) sludge 13 through the sludge supply nozzle (10) A sludge feeder of a fluidized bed incinerator, which passes through (7) and is then incinerated while being mixed with a preheated fluidized bed fed into the combustion board freeboard (8), wherein the sludge feeder (14) is a compressive fluid supply device (3). Wow; A compressive fluid supply nozzle (4) for ejecting the compressible fluid from the compressible fluid supply device (3); A high viscosity sludge supply apparatus for a fluidized bed combustion furnace, characterized in that it is equipped with a valve (5) for adjusting according to the pressure of the pressure gauge (6). 4. The ratio of the diameter of the compressive fluid supply nozzle 4 to the diameter of the sludge supply nozzle 10 is 1/10.

A high viscosity sludge supply apparatus for a fluidized bed combustor, comprising 1/2 and up to 1-5 number of compressive fluid supply nozzles 4 per number of sludge supply nozzles 10.

Images