JPH0217679Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sludge incinerator in which a drying section for sludge cake after forced dewatering is attached to the incinerator so that the sludge cake from the drying section can be continuously supplied.

Although the sludge cake after forced dewatering is generally made into a thin plate by, for example, being compressed and dewatered using a filter cloth, it has the drawback that it takes time to dry the inside during drying. When sludge cake is supplied to the drying treatment section, it is often supplied in the form of lumps, which has the disadvantage of requiring more time for drying, and on top of that, if the sludge cake is not sufficiently dried, a large amount of it will be produced in the incinerator. Thermal efficiency was extremely low, such as requiring 100% of thermal energy.

In view of the above points, the present invention aims to enable efficient drying and incineration through simple improvements.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

A belt press type dehydrator 1 dewaters sludge by squeezing it between a pair of filter cloths, and a hopper 2 is provided to receive the sludge cake after the dewatering process. A rolling processing section 4 in which rollers 3 are arranged in parallel is provided, and a drying processing section 5 is connected to the rolling processing section 4.
In addition, an incinerator 6 is provided in series with the drying processing section 5, and the sludge incinerator is configured so that the sludge cake is continuously supplied, thinned, and then dried and incinerated.

The drying processing section 5 is configured by providing a conveyor 8 made of a wire mesh in a drying chamber 7.

The rolling processing section 4 may be provided so as to be surrounded by a drying chamber 7, and the thinning processing may be performed while heating. If the sludge cake discharged from the dehydrator is already in the form of a thin plate, the hopper 2 can be omitted.

The rolling processing section 4 is configured such that the diameter of the rollers 3 is made smaller toward the rear of the sludge cake, and the gap between the rollers 3 facing across the sludge cake supply route is set to be smaller toward the lower end of the route. The clamping pressure is gradually increased. The thickness of the sludge cake after the pressure dehydration treatment in this rolling treatment section 4 is approximately 5 mm, but the sludge cake is thinned to a thickness of 1 to 3 mm.

The drying processing section 5 may be provided in the incinerator 6, and in any case, it is preferable to use exhaust gas from the incinerator 6 to carry out the heating and drying processing.

The present invention is applicable not only to sludge cakes that are subjected to pressure dewatering with the belt press type dehydrator 1, but also to sludge cakes that have been dehydrated with filter press type dehydrators or centrifugal dehydrators, in other words, sludge cakes that have been subjected to forced dewatering. It can be applied when drying and incinerating.

In summary, the present invention provides the above-mentioned sludge incinerator with a rolling treatment section that thins the sludge cake prior to treatment in the drying treatment section 5,
This rolling processing section is composed of a plurality of sets of clamping rollers, the diameter of which is smaller in the lower position of the sludge cake supply route, and the gap between the rollers facing each other across the supply route is set to be smaller as the position of the supply route is lower. Its features and effects are as follows.

In other words, although this is a simple improvement by just providing the rolling processing section 4, since the sludge cake is made into a thin plate and fed to the drying processing section 5, it is possible to quickly heat the inside of the sludge cake, and both drying and incineration can be avoided. It has become possible to do this more efficiently in a shorter time with less heat energy.

Moreover, since the rolling processing section is constituted by a plurality of sets of rollers 3 in which the diameter of the rollers 3 is gradually reduced and the gap between the opposing rollers is set to be gradually smaller,
The clamping pressure during the rolling process is gradually increased, so the thinning of the sludge cake can be successfully achieved without destroying the sludge cake, and the rolling process can also be expected to have a dewatering effect again, making it easier to avoid subsequent drying and incineration. I was able to do it even more efficiently.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawing is a flow sheet showing an embodiment of the sludge incinerator according to the present invention. 3...Roller, 4...Rolling processing section, 5...Drying processing section, 6...Incinerator.

Claims (1)

[Scope of utility model registration request] A sludge incinerator is provided with a drying section 5 for the sludge cake after forced dewatering treatment, which is attached to the incinerator 6 in a state where the sludge cake after the drying treatment can be continuously supplied, The rolling processing section 4 is provided with a rolling processing section 4 that first thins the sludge cake, and the diameter of this rolling processing section 4 is set to be smaller as the lower the sludge cake supply route is located, and the gap between the rollers 3 facing each other across the supply route is set as above. An incinerator characterized by comprising a plurality of sets of clamping pressure rollers 3, which are set to be smaller as they are inferior.