JP2009148715A - Industrial waste treating method and industrial waste treating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an incinerated ash and exhaust gas absorbing machine and an incinerated ash and exhaust gas absorbing machine apparatus not dependent on reclaiming in a controlled type final disposal site or ocean dumping. <P>SOLUTION: When sending incinerated ash and exhaust gas to the absorbing machine, absorbing liquid is sprayed, a cylindrical part of the absorbing machine is rotated to perform a first mixing with the absorbing liquid, the incinerated ash, exhaust gas and absorbing liquid are brought into a vortex state at the same time and sucked into an absorbing sump tank in the vortex state with gas floating up in a foamed state, to perform a second mixing. The mixture is separated into the absorbing liquid and dewatered cake by a dewatering machine 16, the absorbing liquid is reused, and the dewatered cake is used for aggregate (a recycling material). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

        The present invention relates to an industrial waste treatment method (industrial waste treatment apparatus) for treating combustible waste exhaust gas for treating general waste, old tires, waste plastic, building waste, manure waste, and other combustible waste by combustion. It is a thing.

There are various technologies for treating combustible waste by combustion,
For example, Japanese Patent Application Laid-Open No. 2004-290840 uses a dust collector to remove dust from exhaust gas.
JP 2004-290840 A

  Smoke, exhaust gas, etc. that are inevitably generated when combustible waste is combusted are diffused into the atmosphere and cause pollution, and the equipment is large, resulting in problems such as installation location and cost.

    As shown in Japanese Patent Application Laid-Open No. 2004-290840, incineration ash is incinerated ash using a dust collector, and relies on landfill of a managed final disposal site or ocean dumping because of the powder state. The recycling rate of incinerated ash remained at a low level of about 6%.

An object of the present invention is to provide an industrial waste treatment method (industrial waste treatment apparatus) that mainly removes carbon dioxide and the like from exhaust gas and can contribute to the improvement of the global environment.
A second object of the present invention is to solidify exhaust gas such as carbon dioxide and incineration ash.

In order to achieve the above-mentioned object, the present invention measures the mixing of the spray absorbing means for mixing the exhaust gas and the first absorbing liquid containing water, and the spray liquid and the second absorbing liquid. The cleaning gas is discharged, the mixed liquid is transferred to a waste treatment process, and carbon dioxide and the like in the exhaust gas are absorbed and processed.
Moreover, after absorbing incineration ash and exhaust gas, it dehydrates and solidifies.

According to the industrial waste processing method (industrial waste processing apparatus) of the present invention, carbon dioxide contained in the exhaust gas can be removed by using the absorbent.
In addition, by mixing gas such as carbon dioxide and incineration ash with absorption liquid, and dehydrating and solidifying, it becomes an aggregate material without depending on landfill of managed final disposal site or ocean dumping. (Especially global warming).

        Embodiments of the present invention will be described below with reference to the drawings.

        FIG. 1 is a longitudinal view of incineration ash and exhaust gas absorption machine main body embodying the present invention, showing an example of mixing incineration ash, exhaust gas, and absorption liquid. The explanatory view (flow sheet) which shows is shown.

Absorbing liquid from the spray (2) is sprayed on the waste (1) mixed with incineration ash and exhaust gas, and mixed in the exhaust gas passage (4). In the exhaust gas passage (4), there is a rotating mesh screw conveyor. At this time, the absorbing liquid (100% water or 70% water + 30% water vapor) is sprayed and mixed. The exhaust gas passage (4) has a cylindrical shape that can only help the pressure loss of the flow of incinerated ash, exhaust gas and sprayed absorption liquid, and requires the incineration ash, exhaust gas and sprayed absorption liquid A stable amount according to the flow.
The mixture mixed in the first time and swirled is allowed to flow into the absorption reservoir (100% water) tank (7) in a swirled state, and second mixing is performed.

  Mixing incinerated ash and exhaust gas in the exhaust gas passage (4) with the absorption liquid means that carbon dioxide in the exhaust gas is easily dissolved in water, so it has a high absorption rate by mixing twice. The cleaning gas is discharged to the atmosphere through the clean gas passage (6).

As shown in the figure, the mixed liquid is put into the screen (13), iron pieces of 1 mm or more are removed, and the mixed liquid of 1 mm or less is put into the mixed liquid storage tank (14). At this time, the coagulant is appropriately added from the coagulant liquid tank (15), and the absorption liquid and the separation liquid (carbon dioxide and incinerated ash in a floc state) are separated for the first time. (17), the absorbed liquid is returned to the exhaust gas passage (4) and used again.
The reservoir (14) is for feeding a stable amount as required to the dehydrating machine (16).
The separated liquid in the mixed liquid storage tank (14) is charged into the dehydrating machine (16). The dehydrating machine (16) to be used includes a filter cloth and a centrifuge.
Depending on the machine used, the exhaust gas, and the incineration ash, a coagulant may not be used, but it is used in this embodiment.

    The dehydrating machine includes a centrifugal separation method, a filtration method, a filter cloth, and a filter plate method. In this embodiment, a centrifugal separation method is used.

  The material from which the absorption liquid dehydrated by the dehydration machine (16) has been removed (carbon dioxide and incinerated ash in a flock state), that is, the dehydrated cake (carbon dioxide, incinerated ash, and absorption liquid 30%) is recycled into aggregate material. To. A dehydrated cake absorption rate of about 30% is easy to transport and good for the work environment, and is easy to use as a recycled material, that is, an aggregate material. The dehydrated absorbent is returned to the absorbent tank (17) and used again.

      The present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the spirit thereof.

Cross-sectional view showing industrial waste treatment method (industrial waste treatment equipment) that absorbs incineration ash and exhaust gas and layout diagram of industrial waste treatment equipment method Example of incineration ash, exhaust gas absorbing exhaust gas, and incineration ash waste treatment equipment arrangement (flow sheet)

Explanation of symbols

1 ・ ・ ・ ・ Incineration ash and exhaust gas
2 ・ ・ ・ ・ Spray
3 ・ ・ ・ ・ Absorbing liquid
4 ··· Net-shaped screw conveyor in cylinder (structure)
5 ··· Absorption distillate
6 ・ ・ ・ ・ Clean gas path
7 ··· Tank
8 ・ ・ ・ ・ Cylinder rotation power
9 ・ ・ ・ ・ Water supply and water conditioner
10 ・ ・ ・ ・ Valves to be sent to the storage tank
11 ··· Drain outlet (clean gas passage)

12 .... Incineration ash and exhaust gas absorption machine
13 ... Screen
14 ... Incineration ash, exhaust gas, and absorption liquid storage tank
15 ... Coagulant bath
16 ... Dehydration machine
17 ... Absorber tank

Claims (6)

        The spray absorption means for mixing the exhaust gas and the first absorption liquid containing water, and mixing the spray liquid and the second absorption liquid, discharging the cleaning gas of the liquid mixture, and discharging the liquid mixture to waste A waste disposal method, characterized by transitioning to a disposal process.    The waste disposal method according to claim 1, wherein not only exhaust gas but also incineration ash is guided and mixed with the first absorbent at the same time as the exhaust gas.     The waste treatment method according to claim 2, further comprising a treatment step of dehydrating and solidifying the mixed solution.     4. The waste treatment method according to claim 3, wherein the liquid of the mixed solution is passed through a sieve and the passed liquid is sent to a solidification treatment step.     The mixed liquid and the polymer liquid are mixed, and the mixed liquid is separated from water and other liquids in a storage tank, and water is reused as the first absorbing liquid. The waste disposal method according to item.     Spray absorption means for introducing exhaust gas into the exhaust gas passage and mixing the first absorption liquid containing water and the exhaust gas, an absorption reservoir tank for mixing the mixed liquid with the second absorption liquid, and the absorption A waste gas treatment apparatus, characterized in that a cleaning gas passage for discharging a cleaning gas in a reservoir tank from an exhaust passage and a liquid in the absorption reservoir tank are transferred to a waste treatment process.