JPH0810734Y2 - Waste liquid processing equipment - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention is intended to treat waste liquids and wastes generated from production and consumption facilities of various industries, or waste liquids and wastes having a high water content remaining after water treatment by a water treatment device. Regarding the device.

[0002]

2. Description of the Related Art As a method for treating waste such as a waste liquid having a high water content of 90% or more, there are roughly classified water treatment and concentrated incineration treatment.

In the former water treatment method, not only a large installation area and equipment are required to treat wastewater containing organic substances and especially solvents by water treatment, but also running costs for maintenance are high, and Even if water is treated, sludge will eventually be generated and must be incinerated. In addition, it is very difficult to reduce the treated water after the water treatment to the regulated value or less due to the regulation of the Water Pollution Law, and it is the current situation that this cannot be discharged to the outside.

In the latter method of concentrating incineration, the waste such as waste liquid is incinerated after being dried to the extent that it can be incinerated by evaporating the water content in the concentrating device. Due to its poor efficiency of concentration, large installation area, equipment cost, labor cost, or running cost for maintenance and management increase, and there are serious worries about waste liquid and waste treatment by companies.

[0005]

SUMMARY OF THE INVENTION In view of the above problems, the present invention is directed to the indirect use of heating fluid such as heating steam with waste having a high water content such as waste liquid generated from production equipment, consumption equipment or water treatment equipment. The purpose is to evaporate efficiently by heating to facilitate the incineration process.

[0006]

In order to achieve the above object, in the waste treatment apparatus according to the invention of claim 1,
If indicated by reference numerals, the furnace body 1 is provided with a plurality of hearths 2 in multiple stages, and annular hearths 3 for heating fluid flow are formed in each hearth 2 in multiple layers at appropriate radial intervals. Then, the hearth surface 4 is formed to have an uneven shape, and a part of the hearth 2 is cut out to form a drop port 9 for waste, and the hollow part 3 is provided around the drop port 9 to sandwich it. Fluid inflow pipe 1 communicating with
0 and a heating fluid outflow tube 11 are provided, and weir walls 12, 1 are provided at least along the inflow tube 10 and the outflow tube 11.
3, the inflow pipe side weir wall 12 is projected so as to be higher than the outflow pipe side weir wall 13, a rotary shaft 5 is vertically provided in the center of the furnace body 1, and a horizontal arm is radially provided on the rotary shaft 5. A plurality of 6 are projected in the circumferential direction, and the uneven hearth surface 4 is provided on these horizontal arms 6.
A configuration is adopted in which a suspending annular transfer string 7 for suspending the above waste in the circumferential direction is suspended.

[0007]

According to the waste treatment apparatus of the first aspect of the present invention, waste such as waste liquid is exchanged through the annular hollow portion 3 provided in the hearth 2 of the furnace body 1 by heat exchange with the heating fluid. It is characterized in that the water contained in the waste is evaporated and concentrated by indirect heating from the surface 4. It may be possible to heat the waste directly with a burner for incineration, but in this case, the heat loss is large and the smoke generation rate is large, but as in the present invention, the waste is heated by a heating pipe. Indirect heating with
By evaporating the water content, the thermal energy can be effectively used, the smoke generation is not generated, and the generation rate of pollution is remarkably low, and the subsequent incineration process can be facilitated.

Further, according to the present invention, by forming the heating fluid circulating hollow portion 3 inside the hearth surface 4, the hearth surface 4 becomes uneven, and the contact of the waste material contacting the hearth surface 4 Since the area is large, the thermal efficiency is high, and it has the effect of promoting the evaporation of the water contained in the waste.

Furthermore, according to the present invention, a part of the hearth 2 is cut away to form a waste material drop port 9, and the drop port 9 is sandwiched between the hollow part 3 for heating. A fluid inflow pipe 10 and a heating fluid outflow pipe 11 are provided, and a weir wall 12, at least in a portion along the inflow pipe 10 and the outflow pipe 11.
Since the inflow pipe side weir wall 12 is provided so as to be higher than the outflow pipe side weir wall 13, the wastes having a high water content on the hearth 2 are the weir walls 12, 13 on the hearth 2. The waste that is not vaporized is heated and vaporized in a state of being retained without overflowing to the outside, and the waste that has not been vaporized overflows the weir wall 13 from the outflow pipe side weir wall 13 with a small amount of protrusion and falls through the fall port 9 The water contained in the waste is completely evaporated during the successive drops on the lower hearth 2 and thus on the lower hearth 2, thereby incinerating the waste. It can be dried to the extent possible.

Further, according to the present invention, the rotary shaft 5 is vertically installed at the center of the furnace body 1, and the horizontal arms 6 are radially arranged on the rotary shaft 5.
A plurality of projections in the circumferential direction, and a suspension ring-shaped transfer string 7 for suspending the waste on the uneven hearth surface 4 in the circumferential direction is hung on these horizontal arms 6. Characterize. The wastes thrown into the furnace body 1 are heated by touching the heat source from the surface 4 of the hearth 2. The wastes are placed on the hearth surface 4 in order to increase the heating efficiency of these wastes. It is necessary to stir and heat the generated waste while sequentially transferring it in the circumferential direction. As the transfer means, the present invention has a rotary shaft 5 vertically installed at the center of the furnace body 1 as described above, and a plurality of horizontal arms 6 are radially provided on the rotary shaft 5 so as to project in the circumferential direction. A transfer string 7 is suspended on the arm 6 so that the transfer string 7 is in contact with the hearth surface 4 and the waste on the surface 4 is stirred and transferred in the circumferential direction. . Transport string 4
Has a role of stirring and transferring the waste, and the string-shaped body 4 moves in the circumferential direction while being in contact with the hearth surface 4 so that the hearth surface 4 is always cleaned so that the waste does not adhere to the surface 4. This has the function of preventing the deterioration of thermal efficiency even after long-term use.

However, in the hearth 2, as an indirect heating means, annular heating fluid circulating hollow portions 3 are formed in multiple layers at appropriate radial intervals so that the hearth surface 4 has an uneven shape. Therefore, if the transfer cord 7 is simply hung on the hearth surface 4, the cord 7 has a relatively good contact with the concave portion 4a of the uneven surface 4, but the protrusion 4b has the cord shape. The phenomenon that the body 4 does not contact or the degree of contact is insufficient occurs.

In the present invention, paying attention to this point, the transfer string-like body 7 is looped, that is, hung on a horizontal arm so that the annular part of the string-like body 7 is sufficiently formed on the convex portion 4b. Was found to come into contact with. As described above, according to the present invention, by forming the transfer cord-shaped body 7 in a suspension ring shape, the entire area of the hearth surface 4 can be uniformly cleaned by the transfer cord-shaped body 7. The cleaning efficiency of the surface 4 is improved, and the stable thermal efficiency can be improved over a long period of time.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention, showing a multi-stage waste liquid treatment furnace. In the figure, a vertical furnace body 1 forming a multi-stage waste liquid treatment furnace is provided with heating hearths 2 in multi-steps vertically along the inner wall thereof.

As shown in FIG. 2 (a), the hearth 2 is provided with a plurality of annular heating fluid circulating hollow portions 3 concentrically in multiple layers. A part of the portion 3 is cut out to form a drop port 9, and an inflow pipe 10 and a discharge pipe 11 which communicate with each hollow portion 3 with the drop port 9 sandwiched therebetween are provided in a substantially radial direction. Since the annular hollow portion 3 is formed in multiple layers in the hearth 2 as described above, the hearth surface 4 has an uneven shape as well shown in FIG. In this way, since the surface 4 of the hearth 2 has an uneven shape, the contact surface contact with the waste becomes large, the thermal efficiency is increased, and the evaporation of the moisture contained in the waste can be accelerated accordingly.

FIG. 2 (b) shows a cross section sandwiching the above-mentioned dropping port 9, and a portion along the inflow pipe 10 on the upper surface of each heating hearth 2 and along the discharge pipe 11 are shown. Weir walls 12, 13, and 14 are provided in the portion and the center-side portion of the hearth 5, that is, the end on the rotating shaft 5 side, of which the height of the weir wall 13 along the discharge pipe 11 is different. Weir walls 12, 14
It is formed to be slightly lower than that, whereby the waste liquid staying on the hearth 2 is transferred from the upper surface of the hearth 2 on the side of the inflow pipe 10 to the upper surface of the discharge pipe 11 as shown by the arrow, and the waste liquid is discharged from the drop port 9 to the next stage. It is designed to fall onto the hearth 2.

Further, as shown in FIG. 3, a rotary shaft 5 rotatably driven by an electric motor (not shown) installed in the lower part of the furnace body 1 is vertically installed at the center of the furnace body 1, and the rotary shaft 5 Four horizontal arms 6 that radially extend in the circumferential direction are projected at equal intervals in the circumferential direction, and a transfer string composed of a metal chain or the like for transferring the waste on the uneven hearth surface 4 to the horizontal arms 6 in the circumferential direction. The shaped bodies 7 and 8 are suspended, and the lower ends thereof are in sufficient contact with the hearth surface 4 of the hearth 2. Therefore, with the rotation of the rotary shaft 5, the transfer cord-shaped bodies 7 and 8 perform circular motion while slidingly contacting the hearth surface 4.

The transfer cords 7 and 8 are shown in FIGS.
As shown in (c), both ends thereof are connected to the horizontal arm 6 to form a transfer string-like body 8 and a single string-like body 7.
In particular, the present invention is characterized in that the transfer cord-shaped member 8 formed in an annular shape is provided, and only the concave portion of the hearth surface 4 is provided by the annular cord-shaped member 8. Of course, the cord-like body 8 also comes into sliding contact with the convex portion, and the hearth surface 4 can be efficiently cleaned.

At the top of the furnace body 1, there is provided a vapor pipe 15 for sending out waste steam (vapor) generated in the furnace body.

The waste liquid sent by the waste liquid pump 16 is introduced from the top of the furnace body 1 onto the hearth 2 by the waste liquid introducing pipe 17. The waste liquid on the hearth 2 is the weir walls 12, 13
And is retained on the hearth 2.

In the furnace main body 1, the transfer string 7 of the horizontal arm 6 extending radially from the rotary shaft 5 contacts the uneven surface 4 of the hearth 2 with a sufficient contact area, and moves in the direction of the arrow. It is designed to rotate slowly at a rate of 0.4 to 3 revolutions per minute, whereby the waste liquid is rotated on the heating hearth 2 by the transfer cords 7 and 8 as shown in FIG. The mixture is sequentially stirred and transferred around the shaft 5, and in the course of the transfer, indirect heating is performed on the hearth surface 4, that is, heat exchange is performed with the heating fluid flowing through the heating fluid distribution hollow portion 3 provided in the furnace body 1, and steam is generated. Then, the waste liquid remaining without being evaporated overflows the weir wall 13 with a small amount of projection, and is dropped onto the heating hearth 2 at the lower stage through the drop port 9, and the furnace floor at the lower stage is discharged. Similarly, the water contained in the waste liquid was agitated and transferred on 2 and the water contained in the waste liquid during the transfer. Is evaporated and concentrated, and the finally formed concentrate consisting of the cake and the concentrated liquid is further dropped from the dropping port 9 onto the incinerator hearth (not shown), where it is concentrated. The material will be completely incinerated. Even if a heating fluid composed of high-temperature exhaust gas generated in the incineration process is circulated in the heating fluid circulation hollow portion 3, the exhaust gas is introduced into a heat transfer boiler to generate heating steam by the heat source. Then, the heated steam may be circulated.

[0021]

According to the waste treatment apparatus of the first aspect of the invention, the waste liquid is contained in the waste liquid by heat exchange of the heating fluid flowing through the heating fluid circulation hollow portion provided in the hearth, that is, by indirect heating. Since the generated water is evaporated and concentrated, the heat energy can be effectively used, and the treatment can be performed with no smoke emission and a significantly lower pollution rate.

Further, according to the present invention, since the transfer cord-like body for continuously transferring the waste is provided so as to be in contact with the hearth surface which is the heat exchange surface, the stirring action thereof effectively causes the moisture content. In addition to being able to evaporate, the transfer-cord-like body can constantly clean the hearth surface to prevent a decrease in thermal efficiency.

Further, according to the present invention, since the transfer string-like member is formed in a ring shape, that is, a hanging ring shape, the transfer string-like member is uniformly distributed over the entire surface of the hearth surface forming the uneven surface. By making contact with each other, it is possible to further improve the cleaning efficiency of the hearth surface, it is possible to prevent a decrease in heat exchange efficiency due to this, for a long period of time, and it is possible to use it stably for a long time.

Further, according to the present invention, by forming the heating fluid circulating hollow portion inside the hearth surface, the hearth surface becomes uneven, and the contact area of the waste material contacting the hearth surface is increased. As a result, the heat efficiency is good and it has the effect of promoting the evaporation of the water contained in the waste.

Further, according to the present invention, a part of the hearth is cut out to form a drop port for waste, and a heating fluid inflow pipe is provided around the drop port for communicating with the hollow portion. A heating fluid outflow pipe is provided, and a weir wall is provided at least along the inflow pipe and the outflow pipe so that the inflow pipe side weir wall is higher than the outflow pipe side weir wall. The waste with a high water content on the floor is heated and evaporated by the weir wall on the hearth without being spilled to the outside, and the waste that has not been evaporated remains on the outflow pipe side weir wall with a low protrusion amount. As a result, the overflow of the weir wall is caused to sequentially drop onto the hearth below the drop port, and the water contained in the waste is completely evaporated during the successive drops onto the hearth below. This ensures that the waste is dried to the extent that it can be incinerated. That.

[Brief description of drawings]

FIG. 1 shows an embodiment of a waste liquid treatment apparatus according to the present invention.

FIG. 2A is a partially cutaway plan view showing a partially cutaway internal structure of a hearth of the same apparatus. FIG. 2B shows
It is a principal part longitudinal cross-sectional view of the hearth.

FIG. 3 is a plan view of the hearth.

4 (a), (b) and (c) of FIG. 4 are explanatory views showing a state in which a ring-shaped and linear strip-shaped transfer cord-like body is hung on a horizontal arm and is in contact with the hearth surface. is there.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Furnace main body 2 Hearth 3 Hollow portion for heating fluid flow 4 Hearth surface 5 Rotating shaft 6 Horizontal arm 7 String for transfer 8 String for transfer 12 Weir wall 13 Weir wall

Claims (1)

[Scope of utility model registration request] 1. A furnace to form multi-layer in each of a plurality of hearth provided in the multi-stage in the main body of the heating fluid passing hollow portions of the annular radially appropriate intervals to form the furnace floor surface uneven With the furnace
Cut off a part of the floor to form a drop port for waste.
A heating fluid flow that communicates with the hollow portion around the
An inlet pipe and a heating fluid outlet pipe are provided, and at least the above
The weir wall is located along the inflow pipe and the outflow pipe, and the weir wall on the inflow pipe side is
Projected to be higher than the weir wall on the outflow pipe side , a plurality of horizontal arms are radially projected in the circumferential direction on a rotary shaft vertically provided at the center of the furnace body, and the uneven furnace is provided on these horizontal arms. An apparatus for treating waste such as waste liquid, in which a suspending ring-shaped transfer string-like object for suspending waste on the floor in the circumferential direction is suspended.