JP5763391B2 - Weighing tank and processing equipment equipped with the same - Google Patents

Description

  The present invention relates to a measuring tank that is disposed in a processing facility such as human waste or septic tank sludge and adjusts the flow rate of the liquid to be processed, and particularly relates to a measuring tank to which a coagulation reaction function is added.

  Recently, the treatment of liquids to be treated such as human waste and septic tank sludge has only been pretreated (removing impurities and suspended solids SS in the liquid to be treated) and discharged into sewers. In addition, when discharging into a sewer, the oil content (normal hexane etc.) in a to-be-processed liquid must be suppressed below a regulation value, Therefore The oil content needs to be removed. Therefore, flocculant is added to human waste and septic tank sludge, and after fouling impurities, suspended solids, and oil, they are separated into solid and liquid using a screen. The method of discharging into is adopted.

  In processing equipment such as human waste and septic tank sludge, an agglomeration reaction tank for stirring and reacting the liquid to be treated and the flocculant, a measuring tank for adjusting the flow rate of the liquid mixture of the liquid to be treated and the flocculant, A screen provided with a screen for separating the mixed liquid into impurities (eg, residue) and filtrate and a screw press for dehydrating the impurities is common.

  For example, Patent Document 1 is a processing apparatus mainly including two reaction tanks 1 and 2 for reacting sludge water (liquid to be processed) and a flocculant, a dehydrator 4 and a measuring tank 5. The liquid to be treated and the first flocculant are mixed in the first reaction tank 1 and transferred to the measuring tank 5, and after adjusting the flow rate in the measuring tank 5, the liquid mixture and the second flocculant are mixed in the second reaction tank 2. The mixture is further mixed and stirred by the stirring blade 54 to be flocked, transferred to the dehydrator 4, and dehydrated by the dehydrator 4.

  As described above, when the liquid to be treated such as sludge and the flocculant are reacted, it is common to mix and stir using a reaction tank provided with a stirring blade. An apparatus provided with this kind of stirring blade is also disclosed in Patent Document 2, for example.

JP 2004-275912 A (see FIGS. 1 and 5) Japanese Patent No. 3317949 (see FIG. 2)

  However, since human waste and septic tank sludge contain a lot of fibers such as toilet paper in addition to human excreta, this fiber is entangled with the stirring blades when passing through a reaction tank provided with a conventional stirring blade. was there. Moreover, since the floc is very finely crushed when stirred with a stirring blade, there is a problem that when passing through the screen, the fine aggregated floc falls from the gap of the screen and is treated as waste water together with the filtrate. Further, the floc may pass through a place where the stirring blade does not reach in the reaction tank, and there is a problem that the liquid to be processed passes through the reaction tank without being sufficiently stirred and reacted. Moreover, the reaction tank provided with the stirring blade is large in volume and weight and high in cost.

  On the other hand, the measuring tank in the processing equipment is used to adjust the flow rate of the liquid to be processed. Specifically, the flow rate of the liquid to be processed such as sludge is adjusted in the measuring tank, and a predetermined amount is adjusted to the reaction tank, screen, and dehydration. Transfer to a machine. In addition, the conventional measuring tank has a box shape and the inside is partitioned into several rooms, and weirs are provided between the rooms. When the water surface exceeds a certain level, the liquid to be treated is transferred to the next room. It was a very simple structure that only adjusted the transfer amount.

  Therefore, in view of the above problems, the present invention eliminates the need for a stirring blade, allows the liquid to be treated and the flocculant to be uniformly stirred, mixed, and reacted as a whole, and has a simple structure with reduced cost. It aims at providing the measuring tank which has.

In order to solve the above-mentioned problems, the measuring tank according to the present invention is used in a processing facility for processing liquids such as human waste and septic tank sludge containing fiber, and is used for processing equipment that does not include a stirring device. A measuring tank for adjusting the amount to a predetermined amount, a liquid supply port for supplying a liquid to be processed, and a flocculant for supplying a flocculant solution mixed with the liquid to be processed to the inside A solution supply port, a flow path extending in a horizontal direction through which the liquid to be treated and the flocculant solution pass, and a liquid mixture discharge port for discharging the liquid mixture of the liquid to be treated and the flocculant solution to the outside, The flow path is formed as a zigzag flow path in which barriers are alternately provided , and at least a plurality of protrusions are provided on a floor surface of the flow path among the barrier and the inner wall of the flow path. It is characterized by .

  According to this configuration, the liquid to be treated and the flocculant solution are sufficiently mixed in the process of passing through the zigzag flow path, and the aggregation reaction can be promoted. Further, the liquid to be treated and the flocculant solution can be uniformly mixed and stirred as a whole.

  In addition, since there is no need for a reaction vessel, a stirring device, a stirring blade, or power for moving the same, it is possible to save space for the entire processing facility, and it is possible to greatly reduce various costs such as equipment costs and power costs. .

  In addition, human waste and septic tank sludge contain a lot of fibers such as toilet paper in addition to human excreta, and the measuring tank and the processing equipment of the present invention do not require a stirring device or stirring blades. There is no entanglement of fibers in the stirring blades at the time, and the function stop of the stirring device or the like can be prevented, and the risk of inadvertent stoppage of the function of the entire processing equipment can be suppressed.

Here, the zigzag flow path refers to a bellows-shaped flow path formed by disposing the barriers alternately on the left and right inner walls of the agglomeration reaction chamber having a rectangular shape in a top view, for example. In addition, the barriers may be alternately arranged on the floor surface and the top surface of the agglomeration reaction chamber in addition to the left and right alternates on both side walls in the agglomeration reaction chamber. Further, protrusions are present in the zigzag flow path, and the stirring, mixing and reaction of the liquid to be treated and the flocculant solution are further promoted. In addition, since a turbulent flow is generated by a plurality of protrusions provided on the barrier and the inner wall of the flow path, mixing and stirring are further promoted. In the case where the protrusions are provided on both the barrier and the inner wall of the flow path, the mixing / stirring can be further promoted as compared with the case of only one of them.

  The flocculant solution is mainly composed of aluminum sulfate, sulfate band, polyaluminum chloride, ferrous sulfate, ferric sulfate, ferric chloride, etc. and dispersed in the liquid to be treated such as sludge. Is used for the purpose of collecting and flocking (solidification, precipitation).

  Moreover, it is preferable that the flow rate of the liquid to be treated (including the flocculant solution and a mixture thereof) in the measuring tank is 0.3 to 0.5 m / s. If the speed is too low, mixing and stirring cannot be performed efficiently, and if the speed is too high, the floc may be damaged.

In addition, the measuring tank is divided into at least two chambers, a receiving chamber to which the liquid to be treated is supplied, an agglomeration reaction chamber in which the flow path is formed, and the receiving chamber and the agglomeration reaction chamber. but that are partitioned by a first weir for adjusting the feeding amount of the liquid to be treated.

  According to this configuration, the transfer amount of the liquid to be processed can be adjusted by the first weir, and the liquid to be processed can be sent to the agglomeration reaction chamber by a predetermined amount. Then, the liquid to be treated and the flocculant solution are reacted and mixed in the flow path of the aggregation reaction chamber.

Moreover, this measuring tank is Ru shape der that the projection has no apex.

  According to this configuration, since the protrusion does not have a pointed portion, the fiber is not easily entangled with the protrusion, and the liquid to be processed including the fiber can smoothly pass through the flow path. If fibers are entangled with the protrusions, the mass of fibers gradually increases at that portion, and the flow path may be clogged.

  As the shape of the protrusion, for example, a substantially hemispherical shape, a substantially spherical shape, a substantially conical shape with a rounded top, a substantially rectangular parallelepiped shape with the top and corners removed, and the like are conceivable.

Moreover, this measuring tank is a side end portion of the barrier, along said direction of flow of the liquid to be treated, that has been bent.

  Here, “the side end of the barrier is bent along the direction of the flow of the liquid to be treated” means that the side end of the barrier is along the direction of the flow of the liquid to be treated in the flow path. The barrier is substantially L-shaped when viewed from above.

  According to this configuration, the fibers contained in the liquid to be treated are less likely to be entangled with the side end portion of the barrier. That is, when the side end portion of the barrier is formed straight or bent against the flow, there is a possibility that fibers are entangled with the side end portion of the barrier and the flow path is blocked.

Further, the measuring tank, the barrier, that attached interchangeably.

  According to this configuration, the number of barriers can be changed depending on the viscosity and flow rate of the liquid to be treated, the degree of mixing / stirring with the flocculant solution, and the flow path cross section and flow path length can be changed. Become. Here, “to be exchangeable” means, for example, that the barrier is screwed to the inner wall of the flow channel of the agglomeration reaction chamber so that it can be attached / detached, or a barrier mounting groove is provided in advance on the inner wall of the flow channel, and the barrier is provided there. You may make it the structure which can be attached or removed.

Further, the measuring tank, the agglutination reaction chamber, that consists of several stages of the room.

  According to this configuration, for example, if the number of chambers is two, the flow path length through which the liquid to be treated flows can be approximately doubled, and if the number of stages is three, the flow path length can be approximately three times. In this way, even when processing a liquid to be processed having a high viscosity, mixing and stirring can be sufficiently performed, and the liquid to be processed and the flocculant solution can be reacted more reliably.

Further, the measuring tank includes a second weir that overflows from the receiving chamber and adjusts the flow rate of the processing liquid when the processing liquid flowing into the receiving chamber exceeds a predetermined amount; and a return chamber in which the liquid to be treated from the weir flows of, in the return chamber, that features a treated liquid discharge ports for discharging the liquid to be treated to the outside.

  According to this configuration, overflow of the liquid to be processed from the receiving chamber can be prevented by the second weir. Note that the liquid to be processed overflowed by the second weir returns to the storage tank (receiving tank) of the original liquid to be processed.

  Thereby, the inside of the measurement tank is partitioned into at least three rooms by the first and second weirs. That is, a receiving chamber into which the liquid to be treated flows, a return chamber for collecting the liquid to be treated that has passed through the second weir and overflowed, and a flow path for mixing and stirring the flocculant solution through the first weir It will be divided into the formed agglomeration reaction chamber.

  The second weir is preferably a movable weir. By setting the second weir to be a movable weir, the boundary amount that causes the liquid to be treated to overflow can be changed according to the viscosity or flow rate of the liquid to be treated. The movable weir is a weir that can move up and down, and adjusts the height of the water surface that causes overflow.

Moreover, this measuring tank is Ru with a cleaning water supply port for supplying cleaning water for cleaning the interior.

  According to this configuration, the inside of the measuring tank can be cleaned after the processing step of the liquid to be processed is completed or before the start. Here, the cleaning water supply port is preferably provided at the top of each room.

The processing equipment concerning this invention was provided with the measuring tank of any one of Claims 1-9.

  According to this configuration, since an agglomeration reaction tank and a stirring device are not required, the entire processing facility can be saved, and the risk of a function stop can be reduced. Moreover, the apparatus cost of these agglomeration reaction tanks and stirring apparatuses, and the electric power cost at the time of running can be suppressed.

  In the measuring tank of the present invention, a flow path for mixing and stirring the liquid to be processed and the flocculant solution is formed in the measuring tank by a barrier or a protrusion. The flocculant solution can be sufficiently reacted. Moreover, since the processing equipment provided with this measuring tank does not require an agglomeration reaction tank or a stirring device, the processing equipment can be saved in space and cost can be reduced.

It is a perspective view which shows the structure outline of the measuring tank concerning embodiment of this invention. It is a figure which shows the measuring tank concerning embodiment of this invention, Comprising: (a) is a top view. (B) is a front view. It is AA sectional view taken on the line which shows the measuring tank concerning embodiment of this invention. It is a figure which shows the flow-path part of the measuring tank concerning embodiment of this invention, Comprising: (a) is DD sectional drawing which shows an upper flow path. (B) is the EE sectional view showing the lower channel. It is BB sectional drawing which shows the measuring tank concerning embodiment of this invention. It is CC sectional view taken on the line which shows the measuring tank concerning embodiment of this invention. It is a block diagram of the processing equipment which has a measuring tank concerning embodiment of this invention. It is a block diagram of the conventional general processing equipment.

  Hereinafter, although the measuring tank concerning embodiment of this invention and the processing equipment which has this measuring tank are demonstrated based on drawing, this invention is not limited to the following embodiment.

1. [Configuration of weighing tank]
1-6 is a figure which shows the measuring tank concerning this embodiment. As shown in FIG. 1, the measuring tank 1 according to the present embodiment has a substantially rectangular parallelepiped shape, and the inside is divided into a receiving chamber 2, a return chamber 3, and an agglomeration reaction chamber 4. Each of the rooms 2, 3, and 4 is partitioned by a partition wall. Although the details will be described later, the rough flow of the liquid U to be processed is transferred from the liquid receiving tank (hereinafter simply referred to as “receiving tank”) in which the liquid U is stored to the receiving chamber 2 of the measuring tank 1. The liquid to be processed U flows in and flows from the receiving chamber 2 into the agglomeration reaction chamber 4 where the liquid to be processed U and the flocculant solution C are mixed and stirred. Then, the mixed liquid M in which the liquid U to be treated and the flocculant solution C are mixed and stirred in the aggregation reaction chamber 4 flows to the fine screen. On the other hand, the liquid U to be treated overflowing from the receiving chamber 2 overflows into the return chamber 3 and returns to the original receiving tank.

  A movable weir 5 is provided on the partition wall between the receiving chamber 2 and the return chamber 3, and a fixed weir 6 is provided on the partition wall between the receiving chamber 2 and the agglomeration reaction chamber 4. A flow rate adjusting handle 18 for moving the movable weir 5 up and down is provided on the upper part of the movable weir 5. The flow rate is adjusted by adjusting the position of the water surface that overflows the liquid U to be treated by the flow rate adjusting handle 18.

  The receiving chamber 2 is provided with a processing liquid supply port 7 into which the processing liquid U (eg, human waste / septic tank sludge) flows, and the return chamber 3 returns the overflowing processing liquid U to the receiving tank. The return port 8 is arranged on the lower surface.

  The agglomeration reaction chamber 4 is composed of two upper and lower chambers (aggregation reaction chambers 4A and 4B), which are connected by a through hole. The upper coagulation reaction chamber 4A has a coagulant solution supply port 9 into which the coagulant solution C flows, a flow path 10A in which the liquid U and the coagulant solution C are mixed and stirred, and a lower side. A passage hole 11 to the agglomeration reaction chamber 4B is arranged. The lower agglomeration reaction chamber 4B has a flow path 10B in which the liquid to be treated U and the aggregating agent solution C are mixed and stirred, and a mixed solution thereof. A liquid mixture discharge port 12 for discharging M is disposed.

  Further, the flow paths 10 (A and B) formed in the agglomeration reaction chamber 4 are formed in a zigzag shape by the barriers 13 provided by being alternately shifted to the left and right of the inner wall of the flow path. The end of the barrier 13 is bent along the direction of the flow of the mixed liquid M, and is substantially L-shaped when viewed from above. Thereby, the fiber contained in the to-be-processed liquid U is hard to get entangled in the barrier 13 end part. Moreover, the material of the barrier 13 in this embodiment is SUS. The material of the barrier 13 may be FRP or PVC other than SUS.

  A plurality of substantially conical protrusions 14 excluding a pointed surface are provided on the inner wall floor and top surface of the flow path 10 and the surface of the barrier 13. The protrusions 14 are formed by extruding the barrier 13 from the back side, and the protrusions 14 on the floor surface and the top surface of the flow path 10 are similarly formed.

  A space is provided above the receiving chamber 2, the return chamber 3, and the agglutination reaction chamber 4, and a cleaning nozzle 15 is disposed in the space. The cleaning nozzle 15 is for cleaning the inside of the measuring tank 1 with cleaning water (water or cleaning liquid). Specifically, the cleaning nozzle 15 injects cleaning water before or after the processing of the liquid to be processed. Then, the rooms 2, 3, and 4 are cleaned. The measuring tank 1 is provided with a cleaning water supply port 16 for supplying cleaning water to the cleaning nozzle 15.

  Further, the measuring tank 1 is provided with an odor port 17 for discharging the odor of the liquid to be treated inside to the outside.

2. [Processed liquid flow in the measuring tank]
Next, the processing flow of the liquid U to be processed in the measuring tank 1 will be described with reference to FIG. In addition, the arrow in FIG. 1 shows the flow of the liquid U to be treated (including the liquid mixture M with the flocculant solution C). First, the liquid U to be treated which is human waste or septic tank sludge is stored in the receiving tank 20 by a vacuum car or the like. Then, the liquid U to be processed is sent from the receiving tank 20 to the measuring tank 1.

(1) The processing liquid U flows into the receiving chamber 2 from the processing liquid supply port 7, and the processing liquid U in the receiving chamber 2 accumulates.

(2) When the liquid U to be processed fills the receiving chamber 2 and reaches the fixed weir 6, the liquid U to be processed passes through the fixed weir 6 and is sent to the agglomeration reaction chamber 4 (upper agglomeration reaction chamber 4A). It is done.

  On the other hand, when the liquid U to be processed in the receiving chamber 2 further accumulates and reaches the movable weir 5, the liquid U to be processed passes through the movable weir 5 and is sent to the return chamber 3 (overflow). The liquid U to be treated that has overflowed into the return chamber 3 is returned from the return port 8 to the receiving tank 20 (arrow dotted line).

(3) The liquid U to be treated sent to the upper agglomeration reaction chamber 4A is mixed with the aggregating agent solution C flowing from the aggregating agent solution supply port 9 disposed in the upper part of the agglomeration reaction chamber 4 to become a mixed liquid M. . An injection nozzle is attached to the tip of the flocculant solution supply port 9 to efficiently promote mixing with the liquid U to be treated. The mixed liquid M of the liquid to be treated U and the flocculant solution C collides with the barrier 13 and the protrusion 14 in the course of passing through the zigzag channel 10A of the upper aggregating reaction chamber 4A, and is mixed and stirred. react. At this time, a turbulent flow is generated by the protrusions 14, and the mixing, stirring, and reaction are further promoted.

  Subsequently, the mixed solution M passes through the through hole 11 and is sent to the lower agglomeration reaction chamber 4B. Here again, the mixed solution M passes through the zigzag channel 10B, and the mixed solution M is further mixed, stirred, and reacted. In these processes, the mixed solution M is sufficiently mixed, stirred, and reacted.

(4) Finally, the mixed solution M passes through the flow path 10B of the lower agglomeration reaction chamber 4B, and is then sent from the mixed solution discharge port 12 to the drum screen (fine screen) 40.

3. [Composition of the entire processing equipment]
(1) Next, the whole structure of the processing equipment X including the measuring tank 1 is demonstrated based on FIG.
The processing facility X of the present embodiment includes a measuring tank 1, a receiving tank 20, a crushing input pump 30, a drum screen 40, a screw press 50, a filtrate storage tank 60, a flocculant dissolving device 80, and a coagulation agent. And an agent injection pump 90.

  The receiving tank 20 is for storing one end of the liquid U to be treated which is carried from a vacuum car or the like before sending it to the measuring tank 1. The crushing input pump 30 is used to crush the solid component of the liquid U to be processed to a certain degree when the liquid U is sent from the receiving tank 20 to the measuring tank 1. The drum screen 40 is for removing a relatively large solid content from the mixed solution M sent from the measuring tank 1. This solid content is sent to the screw press 50. On the other hand, the filtrate is sent to the filtrate storage tank 60.

  The screw press 50 is a dehydrator, which dehydrates solids and further separates them into filtrate and solids. The filtrate separated here is sent to the filtrate storage tank 60, and the solid content is sent to the residue hopper 70.

  These steps are for separating the liquid U to be processed into a liquid component (filtrate) and a solid component and performing appropriate treatments. The filtrate is discharged into the sewage from the filtrate storage tank 60, and the solid component is once stored in the residue hopper 70 and then incinerated.

  The flocculant dissolving device 80 and the flocculant injection pump 90 are for producing the flocculant solution C and allowing the flocculant solution C to flow into the measuring tank 1.

(2) On the other hand, as shown in FIG. 8, the processing equipment Y is a conventional processing equipment provided with an agglomeration reaction tank 110 having a stirring device 111 in addition to the measuring tank 101.

(3) As described above, the processing equipment X of the present invention does not require a separate stirrer 111 and agglomeration reaction tank 110 as in the prior art, so that the entire processing equipment can be saved in space. Costs and power costs during running can be reduced. In addition, the fibers contained in the liquid U to be treated are caught by the stirring device and the stirring device fails, and the agglomeration reaction device does not stop for some reason. Therefore, the risk of stopping the entire processing facility due to these failures can be reduced.

4). Conclusion As described above, the preferred embodiments of the present invention have been described with reference to the drawings, but various additions, modifications, or deletions are possible without departing from the spirit of the present invention. In particular, the number of the measuring tanks 1, the number of sections where the flow paths 10 are arranged, the arrangement and shape of the barriers 13 forming the flow paths 10, the number, arrangement, and shape of the protrusions 14 may be variously changed. The present invention can also be applied to liquids to be treated other than human waste and septic tank sludge, and other general water treatment facilities. Applicable to sewage and sludge. Therefore, such a thing is also included in the scope of the present invention.

1 Measurement tank 2 Receiving chamber 3 Return chamber 4 Agglomeration reaction chamber (4A upper agglomeration reaction chamber / 4B lower agglomeration reaction chamber)
5 movable weir 6 fixed weir 7 treated liquid supply port 8 return port 9 flocculant solution supply port 10 flow path (10A upper flow path / 10B lower flow path)
DESCRIPTION OF SYMBOLS 11 Through-hole 12 Mixed liquid discharge port 13 Barrier 14 Protrusion 15 Washing nozzle 16 Washing water supply port 17 Odor port 18 Flow rate adjustment handle 20 Receiving tank 30 Crushing charging pump 40 Drum screen 50 Screw press 60 Filtrate storage tank 70 Slag hopper 80 Flocculant dissolution apparatus 90 Flocculant injection pump U Liquid to be treated C Flocculant solution M Mixture X Treatment facility Y of the present invention Conventional treatment facility

Claims (10)

A treatment tank for treating liquid such as human waste containing fiber and septic tank sludge, etc., is used for treatment equipment not including a stirring device, and is a measuring tank for adjusting the transfer amount of the liquid to be treated to a predetermined amount,
A liquid supply port for supplying liquid to be processed to the inside;
A flocculant solution supply port for supplying the flocculant solution to be mixed with the liquid to be treated to the inside;
A horizontally extending channel through which the liquid to be treated and the flocculant solution pass;
Provided with a liquid mixture outlet for discharging the liquid mixture of the liquid to be treated and the flocculant solution to the outside,
The flow path is formed as a zigzag flow path with barriers provided alternately,
Among the barrier and the inner wall of the flow path, at least a plurality of protrusions are provided on the floor surface of the flow path. Due to the plurality of protrusions provided on the floor of the flow path, turbulence occurs in the flow path, and the stirring and mixing of the liquid to be treated is improved.
The measuring tank according to claim 1. In the measuring tank according to claim 1 or 2,
The interior is divided into at least two chambers, a receiving chamber to which the liquid to be treated is supplied, an agglomeration reaction chamber in which the flow path is formed,
The measuring tank, wherein the receiving chamber and the agglomeration reaction chamber are partitioned by a first weir for adjusting a transfer amount of the liquid to be processed.   The measuring tank according to claim 1, wherein the protrusion has a shape that does not have a pointed portion.   The measuring tank according to any one of claims 1 to 4, wherein a side end portion of the barrier is bent along a flow direction of the liquid to be treated in the flow path. .   The said tank is attached so that replacement | exchange is possible, The measuring tank of any one of Claims 1-5 characterized by the above-mentioned. 4. The measuring tank according to claim 3, wherein the agglomeration reaction chamber is composed of a plurality of stages of rooms. A second weir that overflows from the receiving chamber and adjusts the flow rate of the processing liquid when the processing liquid flowing into the receiving chamber exceeds a predetermined amount;
A return chamber into which the liquid to be treated flows from the second weir;
The measuring tank according to claim 3, wherein the return chamber includes a processing liquid discharge port for discharging the processing liquid to the outside. In the measuring tank of any one of Claims 1-8,
A measuring tank comprising a cleaning water supply port for supplying cleaning water for cleaning the inside of the measuring tank. A treatment facility for a liquid to be treated, comprising the measuring tank according to any one of claims 1 to 9.

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