JPS5912997Y2 - Mixing device for sludge or sewage and flocculant - Google Patents

Description

[Detailed description of the invention] The present invention relates to a mixing device that efficiently mixes sludge or sewage and a flocculant, and in particular utilizes the potential energy of fluid to continuously and rapidly mix sludge or sewage and a flocculant. The present invention relates to a device for mixing sludge or sewage with a flocculant, in which a mixing gutter is removably installed in a mixing pipe to facilitate cleaning of the inside.

BACKGROUND ART Conventionally, sludge or sewage is mixed with a flocculant, and fine suspended matter in sludge or sewage is rapidly mixed with a flocculant to coagulate and form flocs.

In the case of sewage treatment, this floc is mixed slowly to form larger flocs mainly to obtain clear water, and in the case of sludge treatment, it is used to improve dewatering performance by forming flocs. It is for.

Therefore, when mixing sludge or sewage with a flocculant, the entire flocculation process is determined by whether or not rapid mixing has been carried out well.Especially when using a polymer flocculant, the success or failure of rapid mixing depends on the success or failure of rapid mixing. It has a decisive influence on the entire agglomeration process.

Conventionally, there are devices that use power to force the mixture, but
The structure is complicated, such as a closed pressure vessel structure and a rotating drum type, which has the disadvantage of being expensive and requiring time and effort to maintain.

The purpose of the present invention is to continuously and rapidly mix sludge or sewage with a flocculant without using any power, and to make it easy to clean the inside so that maintenance is not required. An object of the present invention is to provide a device for mixing agents.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

The device of the present invention has a confluence pipe 1 for sludge or sewage and a flocculant at one end.
A mixing pipe 2 connected to the mixing pipe 2 and a plurality of baffle plates 3 detachably attached to the bottom of the mixing pipe 2 are arranged at intervals almost perpendicular to the flow of sludge or sewage. It consists of a semicircular mixing gutter 4, with the mixing pipe 2 on the merging pipe 1 side at a high position and the mixture outlet 5 side at a low position.

First, the merging tube 1 connected to one end of the mixing tube 2 is made of a flexible material so that the inclination angle of the mixing tube 2 can be changed arbitrarily.

The upper part of the confluence pipe 1 is an inflow part 6 for sludge or sewage a, and below the inflow part 6, a coagulant injection pipe 7 is provided protrudingly.

Further, a collar portion 8 is provided on the outer periphery of both ends of the mixing tube 2.

The mixing gutter 4 installed at the bottom of the mixing pipe 2 has a roughly semicircular cross section, and has a plurality of baffle plates 3 in the width direction, for example, in the flow direction of sludge or sewage as in this embodiment. They are arranged at appropriate intervals with an inclination along the flow direction or with an inclination opposite to the flow direction.

The number of baffle plates 3 to be installed, angle of inclination, size, etc. are selected optimally depending on the properties of sludge or sewage, taking into account the inclination of the mixing tube 2 itself. Since the solid component is large and the flow resistance is large, it is better to make the slope of the baffle plate 3 along the flow direction as in this example to improve the flow of the sludge being mixed with the flocculant. Good results are obtained.

In addition, a flange 9 is provided at one end of the mixer 4 and matches the flange 8 of the mixing tube 2, and a bolt insertion hole 10 formed in the flange 9 and a bolt insertion hole 10 provided in the flange 8 are provided at one end of the mixing machine 4. Insert the bolt into the hole I/insertion hole (not shown) and tighten with the nut.
The mixer 4 is detachably attached to the inner bottom of the mixer tube 2.

In addition, a flange 11 that fits the flange 8 of the mixing tube 2 is provided on the opening periphery of the merging tube 1 on the opposite side of the inlet 6. The flanges 9 are sandwiched and tightened with the Pol I and nuts in the same manner as described above to establish communication between the mixing tube 2 and the merging tube 1.

Since there is a flange 8 on the side of the mixture outlet 5 of the mixing tube 2,
By connecting similar mixing tubes 2 in series here, the required length of the mixing tubes 2 can be determined as appropriate.

As described above, in the device of the present invention, the mixing tube 2, in which the merging tube 1 for sludge or sewage and flocculant is connected in series at one end, has the merging tube 1 side in a high position and the mixture outlet 5 side in a lower position. , a mixing machine 4 having a roughly semicircular cross section, in which a plurality of baffle plates 3 are arranged at intervals at substantially right angles to the flow of sludge or sewage at the bottom of the mixing tube 2.
is removably attached to the inflow section 6 of the confluence pipe 1.
Inject sludge or sewage a into the injection pipe 7')? If the lk collector is injected, the sludge or sewage a and the coagulant will flow into the confluence pipe 1.
However, since a mixer 4 is provided at the bottom of the mixing tube 2, both liquids a and t) flow toward the baffle plate 3. Upon contact, the flow direction changes, passes over the top of this baffle plate 3, and falls to the bottom in front of the next baffle plate 3. This action is repeated one after another, and the sludge or sewage a and the flocculant are rapidly mixed. By the time the mixture reaches the outlet 5 of the mixing tube 2, a strong floc is formed.

Depending on the nature of the sludge or sewage to be treated, two sets of mixing pipes may be connected in series to mix the sludge or wastewater in order to enhance the mixing effect with the flocculant or to suit the installation location of the next-stage treatment facility. be able to.

The flocs are transferred through the outlet 5 of the mixing tube 2 to next-stage treatment facilities such as a sedimentation tank, a thickening tank, and a dehydrator.

As described above, the present invention has a simple structure and can be made compact, so it can be manufactured at low cost.

In addition, the sludge or sewage and flocculant are continuously and rapidly mixed by the mixer while passing through the mixing pipe to form a strong floc, so that the treatment process at the next stage treatment facility can be carried out smoothly.

. Furthermore, the sludge or sewage and flocculant are mixed as they fall naturally along the slope of the mixing tube due to the potential energy of the liquid, so no power is required, reducing electricity costs. .

In addition, since the mixer is detachably installed in the mixer tube, the inside can be easily cleaned and maintenance is not required.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the device of the present invention, FIG. 2 is an enlarged sectional view taken along line AA in FIG. 1, and FIG. 3 is a partial perspective view of the mixing machine. 1: Merging pipe, 2: Mixing pipe, 3: Blocking plate, 4: Mixer, 5
: outlet, 6: inlet, 7: injection pipe, 8: flange, 9: flange, 10: bolt insertion hole, 11: flange.

Claims (1)

[Scope of utility model registration request] A mixing pipe having a confluence pipe for sludge or sewage and a flocculant connected to one end is placed in a high position, and the outlet side of the mixture is in a low position;
A sludge characterized by a mixing gutter having a roughly semicircular cross section, which has a plurality of baffle plates arranged at intervals almost perpendicular to the flow of sludge or sewage at the bottom of the mixing pipe, and is detachably attached thereto. Or a mixing device for wastewater and flocculant.