JPS6010797B2 - How to prepare materials for rotating filter bed - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for collecting material for a rotary hearth body used for biological treatment of wastewater, sewage, etc.

[Prior art] As a measure to improve the processing capacity of a rotary biofilter that treats wastewater and sewage using aerobic microorganisms, the contact surface area was increased by increasing the size of the disk that makes up the rotary hearth body of the rotary biofilter. However, if a disk made of expanded polystyrene is used, if the diameter is 2 mm, the thickness will be as large as 15 mm, so it will be difficult to accommodate the disk in a certain space. The number of sheets decreases, and as a result, the surface area per unit volume cannot be increased very much, and the entire device becomes bulky, resulting in a reduction in processing capacity.

In order to improve this drawback and dramatically increase the contact surface area, we developed a hearth material in which thin plates of polypropylene, polyethylene, vinyl chloride, etc. are formed into uneven shapes and stacked in blocks to form water-permeable gaps. came to be used. However, the above-mentioned plate-shaped or block-shaped hearth materials with water passage gaps cannot be made large-sized due to restrictions such as manufacturing equipment, transportation, and cost. On the other hand, there is a demand for larger rotary hearth bodies and lower costs. [Problems to be Solved by the Invention] An object of the present invention is to provide a method for removing material for a rotary hearth body that can satisfy the above-mentioned needs.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention uses a right-angled isosceles triangle and a square corresponding to twice this triangle as the basis for material collection.

That is, a hearth material in the form of a plate or a block with a water passage gap is cut into a right isosceles triangle to form an element, and the element is used alone, or a plurality of elements are combined, or the element is A plurality of square elements having twice the size of the element are combined to form a right-angled isosceles triangular base member, and the base member is located on the hypotenuse of the base member and extends from one end of the hypotenuse to the other. A method for collecting materials for a rotary hearth body, which comprises cutting the base portion along a line perpendicular to the oblique side passing through a point at a distance equal to the length of the side to form a hearth assembly member. It is. [Operation] First, a right-angled isosceles triangular element is obtained, and then the right-angled isosceles triangular element is appropriately combined with the above-mentioned right-angled isosceles triangular element or a square element equivalent to twice the size of the right-angled isosceles triangular element. Obtain a foundation member of a right-angled isosceles triangle and draw a line perpendicular to said hypotenuse through a point on the hypotenuse of this foundation member and at a distance equal to the length of the other side from one end of said hypotenuse. ``Since the cut pieces are also in the shape of a right-angled isosceles triangle, they can be used as the above-mentioned elements.

〔Example〕

Hereinafter, the material collecting method of the present invention will be explained with reference to the drawings.

(First step) A plate-like hearth material with an appropriate planar shape or a block-like hearth material with a water passage gap is cut into a right isosceles triangle shape and a second step is performed.
A device 1 as shown in the figure is formed.

FIG. 1 shows a square element 2 having twice the size of the element 1 described above.

Block-shaped hearth materials with water passage gaps are usually commercially available as modules with a square cross section of 1 skin x 1 skin, so if you use this commercially available product, you can achieve the above-mentioned results without causing loss. Element 1 of right-angled isosceles triangle
Alternatively, a square element 2 can be obtained.

(Second step) In order to make a right-angled isosceles triangular base member 3 of various sizes using the elements 1 or 2, if the element wing is used alone, the shape shown in Fig. 2 is obtained, and two elements are used. When you combine 1, you get the 3rd
The shape shown in the figure is obtained ~ When four elements 1 are combined, the shape shown in Fig. 4 is obtained, and when one element 2 and two elements 1 are combined, the shape shown in Fig. 5 is obtained, and the two elements When element 2 and four elements 1 are combined, the shape shown in FIG. 6 is obtained.

From the above, it is clear that the element 1 or the element 1
By suitably combining elements 2 that are twice the size of the base member 3, it is possible to easily increase the size of the right-angled isosceles triangular base member 3 and, by extension, the rotating hearth body constituted by the base member 3.

Note that a basic member 3 that combines a plurality of elements 1 or 2
In this case, each element is separated.

(Third step) To make a hearth assembly member using the foundation part 3, the shape of the right isosceles triangle base member is changed to △A in Fig. 7.
Indicated as BC, a line x perpendicular to the hypotenuse BC passes through a point D that is on the hypotenuse BC of △ABC and is at a distance BD equal to one length of the other side AB from one end B of the hypotenuse BC. When the base member 3 is cut along the lines, a hearth assembly neck member 4 having the shape of a rectangle ABDE is obtained.

The △DCE produced by cutting becomes a right-angled isosceles triangle, so if these are used as the element 1, base sections 3 of different sizes are obtained as shown in FIG. 8, and furthermore, a hearth assembly member is obtained. This allows for effective use of hearth materials.
The cost of the rotary hearth body can be reduced.

When the hearth assembly member is made of plate-shaped hearth material,
Each plate member is formed in advance into a block shape with appropriate gaps interposed therebetween. Block-shaped with square end faces ABDE
The hearth assembly member 4 having the shape of is arranged and fixed around the rotating shaft through a mounting frame attached to the rotating shaft and a presser plate with the tip B facing the center of rotation, and assembled into a rotating hearth body. It is. From the foundation member shown in Fig. 3 to the EABD shown in Fig. 7
When making a hearth assembly member having an end face shape of
A similar hearth assembly member can also be obtained in combination with AB. Furthermore, the hearth assembly member 4 obtained by the material taking method of the present invention is compared with the right triangular hearth assembly member 6 having the same rotation radius r and the same center angle 8 as shown in FIG. As shown in , the contact area becomes larger.

Note that a basic member 3 that combines a plurality of elements 1 or 2
In the hearth assembly member 4 constructed using the above, each element is separated, so when assembling the rotary hearth body, these elements must be piled up around the rotation axis. It is advantageous to interpose a net between each element. [Effects of the Invention] As is clear from the above, in the material extraction method of the present invention, as a first step, a hearth material in the form of a plate or a block with a water passage gap is cut into a right isosceles triangle and an element is formed. Then, as a second step, the above element is used alone, a plurality of the above elements are combined, or both the above element and a square element having twice the size of the above element are thinly combined in several pieces. The base member is shaped like a right-angled isosceles triangle, and the third
As a step, the base member is cut along a line perpendicular to the hypotenuse passing through a point on the hypotenuse of the base member and at a distance equal to the length of the other side from one end of the hypotenuse to form a hearth. Since it is used as an assembly member, if the hearth material is taken by the method of the present invention, the material taking operation is simple and can be done accurately and easily at the assembly site, and it is possible to increase the size of the rotary hearth body. This makes it possible to easily achieve this, with very little loss occurring, making it possible to increase the contact area and reduce production costs.

[Brief explanation of drawings]

Figure 1 is a plan view of a commercially available hearth material, Figures 2 to 6 are explanatory diagrams for creating a right isosceles triangular base member by combining elements, and Figure 7 is for assembling a rectangular hearth. FIG. 8 is an explanatory diagram of the use of the cut pieces in FIG. 7, and FIG. 9 is a comparison diagram of the contact area of the end surfaces. 1: Right-angled isosceles triangular element, 2: Three square elements, 3: Right-angled isosceles triangle base member, 4: Rectangular hearth assembly member, 6
: Conventional hearth assembly parts. Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1. Cutting a plate-shaped or block-shaped filter bed material with water flow gaps into right-angled isosceles triangles to form elements, and using the element alone or combining a plurality of the elements;
Alternatively, an appropriate number of both the element and a square element having twice the size of the element are combined to form a base member in the shape of a right-angled isosceles triangle, and the base member is on the hypotenuse of the base member and at one end of the hypotenuse. A material for a rotating filter bed, characterized in that the base member is cut along a line perpendicular to the oblique side through a point at a distance equal to the length of the other side from the base member to form a filter bed assembly member. How to take it.