KR101779990B1 - Duel tank type reactor with function of two way mixing and method for mixing without eletric power using it - Google Patents

Abstract

The present invention relates to a dual reaction tank for stirring treatment solutions in a reaction tank in which an inner barrel and an outer barrel are connected, and a nonpowered stirring method using the same. By controlling a first release valve and a second release valve for releasing biogas by being connected respectively to the outer barrel and the inner barrel so as to alternately move the treatment solution in both direction by differential head in the outer barrel and the inner barrel, and also by selectively controlling opening and closing of a pressure balancing valve connecting the outer barrel and the inner barrel, it is possible to increase stirring efficiency by conducting bidirctional stirring processes between the outer barrel and the inner barrel.

Description

TECHNICAL FIELD [0001] The present invention relates to an abdominal-type reaction tank having a two-way stirring function and a non-powered stirring method using the same. [0002]

More particularly, the present invention relates to a reaction tank used for producing biogas by decomposing organic wastes in an anaerobic state, and a non-powered agitation method using the same.

The organic waste agitation in the conventional anaerobic digestion tank is formed by a circulating agitation system through an external pump, a mechanical agitation system using an agitator and an underwater mixer, a gas agitation system for injecting the produced biogas into the bottom of a digester, There is a nonmotor stirring method utilizing the potential energy.

In the case of pump circulation agitation, mechanical agitation and gas injection agitation, the power ratio is generated due to the operation of the equipment for agitation, and the maintenance cost due to the deterioration of the driving part with time elapses.

In order to minimize these costs, a technique of non-agitated stirring was developed by introducing a fixed mixer into the abdominal anaerobic digestion tank having inner passageways and a fixed mixer at the upper and lower portions of the digestion tank through biogas generation / .

Since the anaerobic digestion tank according to the conventional non-powered agitation method utilizes the head difference between the inner and outer tubes generated by the biogas pressure generated in the outer tube, it can be agitated only in one direction (inner tube → outer tube) There is a limit in the up-and-down stirring. In addition, since the biogas pressure necessary for the formation of the water head difference necessary for stirring between the inner and outer tubes is completely dissolved after the stirring, a considerable time is required until the biogas pressure required for the subsequent stirring is formed.

In order to solve the problems in the prior art, it is an object of the present invention to shorten the time required for subsequent stirring after agitation by eliminating the head margin, while allowing stirring in the reverse direction as well as stirring from the inner cylinder to the outer cylinder of the abdominal- And a non-powered stirring method using the same.

In order to solve the above-mentioned problems, the abdominal-type reaction tank of the present invention is a abdominal-type reaction tank for stirring the process liquid inside a reaction tank in which an outer cylinder and an inner cylinder are communicated, A pressure balance valve for opening and closing the valve; A first discharge valve for opening and closing a first discharge pipe for discharging the biogas in the outer cylinder; A second discharge valve for opening and closing a second discharge pipe for discharging the biogas in the inner cylinder; And a control unit for selectively controlling opening and closing of the first and second discharge valves and the pressure equalizing valve so that the treating liquid alternately moves in both directions by the head difference of the outer cylinder and the inner cylinder; .

Preferably, a plurality of water passages communicating with the outer cylinder are provided in the lower portion of the inner cylinder so that the treatment liquid flows obliquely to the circumferential surface of the inner cylinder.

At this time, the bottom portion of the inner cylinder is formed with an inner cylinder sloping face inclined downward from the center toward the water passage. A bottom portion of the outer cylinder is formed with an outer cylinder sloping surface inclined downward toward the water inlet.

Preferably, a plurality of impingement plates projecting inward are provided on the inner circumferential surface of the outer cylinder so that a vortex is formed inside the outer cylinder when the treatment liquid is moved from the inner cylinder to the outer cylinder by the water head difference.

A biogas reservoir connected to an upper portion of each of the outer tube and the inner tube for receiving and storing the biogas generated in the outer tube and the inner tube; A first pressurizing valve for opening and closing a first pressurizing pipe for supplying the biogas from the biogas reservoir to the outer cylinder; A second pressurizing valve for opening and closing a second pressurizing pipe for supplying the biogas from the biogas reservoir to the inner cylinder; And a pressurizing pump for pressurizing and supplying the biogas from the biogas storage tank to the outer tube and the inner tube; And the control unit selectively controls the first and second pressurizing valves and the pressurizing pump so that the head difference between the outer cylinder and the inner cylinder is forcefully formed.

Meanwhile, in the non-powered agitation method using the abdominal-type reaction tank, the first discharge valve and the pressure equalizing valve are closed and the second discharge valve is opened to form a head difference due to the biogas inside the outer cylinder b); (C) closing the first and second discharge valves and opening the pressure equalizing valve to cause agitation from the inner cylinder to the outer cylinder; (D) closing the pressure equalizing valve and the second discharge valve, and opening the first discharge valve to maintain the biogas in the inner cylinder; (E) maintaining the step (d) to form a head difference due to the biogas in the inner cylinder; (F) closing the first and second discharge valves and opening the pressure balance valve to generate agitation from the outer cylinder to the inner cylinder; (G) closing the first discharge valve, the pressure equalizing valve, and opening the second discharge valve to maintain the biogas inside the outer cylinder; And (h) maintaining the step (g) to form a head difference due to the biogas inside the outer cylinder; .

Preferably, the step (a) comprises closing the pressure equalizing valve and opening the first and second discharge valves before the step (b); .

As another embodiment of the present invention, there is provided a non-powered agitation method using an abdominal-type reaction vessel additionally provided with a forced water head difference forming function, wherein the first discharge valve and the pressure equalizing valve are closed, A step (b ') of operating the pressurizing pump with the 1-pressure valve being opened to forcibly form a head difference caused by the biogas in the outer cylinder; (C) closing the first and second discharge valves and opening the pressure equalizing valve to cause agitation from the inner cylinder to the outer cylinder; (D) closing the pressure equalizing valve and the second discharge valve, and opening the first discharge valve to maintain the biogas in the inner cylinder; (E) maintaining the step (d) to form a head difference due to the biogas in the inner cylinder; (F) closing the first and second discharge valves and opening the pressure balance valve to generate agitation from the outer cylinder to the inner cylinder; (G) closing the first discharge valve and the pressure equalizing valve and opening the second discharge valve to maintain the biogas inside the outer cylinder; And (h) maintaining the step (g) to form a head difference due to the biogas inside the outer cylinder; .

As another embodiment of the present invention, there is provided a non-powered agitation method using a abdominal-type reaction vessel additionally provided with a forced water head difference forming function, wherein the first discharge valve and the pressure equalizing valve are closed, (B) forming a head difference due to the biogas in the outer cylinder; (C) closing the first and second discharge valves and opening the pressure equalizing valve to cause agitation from the inner cylinder to the outer cylinder; (D) closing the pressure equalizing valve and the second discharge valve, and opening the first discharge valve to maintain the biogas in the inner cylinder; (E ') maintaining the step (d) and forcibly forming a head difference due to the biogas in the inner cylinder by operating the pressurizing pump in a state in which the second pressurizing valve is opened; (F) closing the first and second discharge valves and opening the pressure balance valve to generate agitation from the outer cylinder to the inner cylinder; (G) closing the first discharge valve and the pressure equalizing valve and opening the second discharge valve to maintain the biogas inside the outer cylinder; And (h) maintaining the step (g) to form a head difference due to the gas inside the outer cylinder; .

INDUSTRIAL APPLICABILITY According to the abdominal-type reaction tank having bidirectional stirring function and the non-dynamic stirring method using the same according to the present invention, it is possible not only to perform bi-directional stirring with respect to the inner passage outer tube, but also to shorten the time required for subsequent stirring, The biogas production efficiency by anaerobic digestion of the treatment liquid can be improved through the improvement of the stirring efficiency with respect to the treatment liquid, thereby improving the biogas productivity.

Also, since the residual organic matter concentration in the treated liquid after the anaerobic digestion is lowered from the improvement of the biogas productivity, the burden of the downstream wastewater treatment process is reduced, and the sludge generation amount is reduced, thereby reducing the sludge treatment cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing the configuration of a abdominal-type reaction vessel according to an embodiment of the present invention; FIG.
Fig. 2 is a plan view showing the abdominal-type reactor bottom structure of Fig. 1; Fig.
Fig. 3 is a perspective view showing the internal structure of the abdominal-type reaction vessel of Fig. 1; Fig.
Fig. 4 is an explanatory view showing a stirring procedure of the abdominal-type reaction vessel of Fig. 1; Fig.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

As shown in Figs. 1 to 3, the abdominal-type reaction tank of the present invention basically comprises an outer cylinder 10 to which a treatment liquid is supplied and an inner cylinder 11 which is communicated with the outer cylinder 10 and is disposed therein.

Such abdominal reaction tank may be used as a anaerobic digestion tank for biodegrading organic wastes in an anaerobic state to produce biogas or a reaction tank for producing biohydrogen as a reaction product in a liquid material stirring process.

Hereinafter, the abdominal-type reaction tank used as the anaerobic digestion tank will be mainly described, and the basic constitution such as the process liquid inlet pipe and the discharge pipe used in the ordinary anaerobic digestion tank will be omitted because it is a known technology. The description will be focused on the configuration related to the agitation.

The abdominal type reaction tank of the present invention is characterized in that in order to carry out a stirring step between the outer cylinder 10 and the inner cylinder 11 by using the head difference of the inner cylinder 10 and the inner cylinder 11, The upper portion of each of the pressure balance pipes 11 is connected to the pressure equalizing pipe 20 and the pressure equalizing valve 21 for opening and closing the pressure equalizing pipe 20 is provided.

Each of the outer cylinder 10 and the inner cylinder 11 is provided with a first discharge pipe 28 and a second discharge pipe 26 for discharging the biogas therein and the first and second discharge pipes 28 and 26, And first and second discharge valves 29 and 27 for opening and closing the pipeline are provided, respectively.

The control unit (not shown) controls the first and second discharge valves 29 and 27 and the pressure equalizing valve 21 so that the process liquid alternately moves in both directions due to the water head difference between the outer cylinder 10 and the inner cylinder 11. [ And selectively controls opening / This control unit is operable with the respective pressure sensors for measuring the pressure of the outer cylinder 10, the inner cylinder 11 and the biogas storage tank 40, and can compare the measured pressures with the set values to control the above-mentioned valves .

More specifically, the pressure balancing valve 21 is closed by the control unit, and one of the first and second discharge valves 29 and 27 is closed and the other is opened, When the water head difference set by the pressure of the biogas generated by the biogas generated in the internal cylinder 11 is generated, the discharge valve 29 or 27 in an opened state is closed and then the pressure equalizing valve 21 is opened, The treatment liquid agitates. The detailed stirring operation will be described later.

After the agitation has been generated by the valve operation, the pressure balance of the internal tube 11 and the outer tube 10 is equal to or more than a predetermined value. Therefore, when the biogas of the inner tube 11 and the outer tube 10 is completely discharged The waiting time until the formation of the water head difference necessary for the subsequent stirring is greatly reduced as compared with the conventional art.

The structure of the abdominal-type reaction vessel of the present invention includes a plurality of water passageways 13 communicating with the outer cylinder 10 below the inner cylinder 11 so that the treatment liquid flows obliquely to the circumferential surface of the inner cylinder 11. [ A counterclockwise flow velocity is formed in the outer cylinder 10 of Fig. 2 when the inner cylinder 11 is agitated in the direction of the outer cylinder 10 by the water inlet 13 thus configured, The flow velocity in the clockwise direction is formed inside the inner cylinder 11 at the time of stirring in the direction of the arrow 11.

At this time, in order to increase the flow rate of the treatment liquid, the bottom of the inner cylinder 11 is formed with an inner cylinder sloping surface 12 inclined downward from the center toward the water inlet 13. Similarly, at the bottom of the outer cylinder 10, an outer cylinder slope 14 inclined downward toward the water inlet 13 is formed. The inner cylinder slope surface 12 accelerates the flow velocity from the inner cylinder 11 to the outer cylinder 10 and the outer cylinder slope face 13 accelerates the flow velocity in the opposite direction.

A plurality of impingement plates 10 protruding inward are formed on the inner circumferential surface of the outer cylinder 10 so as to form a vortex in the treatment liquid inside the outer cylinder 10 during agitation from the inner cylinder 11 to the outer cylinder 12, (15) at regular intervals. The impingement plate 15 may be formed of a plate protruding in a vertical direction from the inner circumferential surface of the outer cylinder 10, and the shape and size of the impingement plate 15 may be adjusted according to the capacity and size of the reaction vessel.

On the other hand, in the abdominal-type reaction tank described above, it is preferable to add an apparatus for forcibly forming a headwater for forming the necessary head difference when an initial stage of anaerobic digestion or a situation where biogas production is not performed properly occurs.

And a biogas storage tank 40 connected to an upper portion of each of the outer tube 10 and the inner tube 11 for receiving and storing the biogas generated in each of the outer tube 10 and the inner tube 11, And first and second pressurizing pipes 22 and 24 for supplying the stored biogas to the respective pressurizing pipes 11, respectively, and the first and second pressurizing valves 23 and 25 are installed in the respective pressurizing pipes.

The pressurizing pump 30 is operated to pressurize and supply the biogas from the biogas storage tank 40 to either the outer cylinder 10 or the inner cylinder 11 in a state in which any one of the first and second pressurizing valves 23 and 25 is opened. Respectively.

The control unit selectively controls the first and second pressurizing valves 23 and 25 and the pressurizing pump 30 so that the difference in the treatment liquid between the outer cylinder 10 and the inner cylinder 11 is forcefully formed.

Hereinafter, the non-powered stirring method using the abdominal-type reaction tank will be described with reference to FIG. The numbers indicated in the upper space of the outer tube 10 and the inner tube 11 in the drawing are for the sake of convenience in explaining the pressure state. In the figures '100' and '0', a water head difference , And '50' means the pressure equilibrium state.

First, the bubbling step for non-powered agitation closes the pressure equalizing valve 21 and opens the first and second discharge valves 29 and 27 (step (a)).

The first discharge valve 29 and the pressure equalizing valve 21 are closed and the second discharge valve 27 is opened so that the water level is lowered by the pressure of the biogas inside the outer cylinder 10, (Step (b)).

The first and second discharge valves 29 and 27 are closed and the pressure balancing valve 21 is opened to cause stirring from the inner cylinder 11 to the outer cylinder I0 (step (c)). That is, the treatment liquid in the inner cylinder 11 having a high water level flows into the outer cylinder 10 through the water passage 13, and the treatment liquid is agitated. At this time, the treatment liquid is accelerated by the inner tube sloping surface 12 and the outer tube sloping surface 14, and vortices are formed while colliding with the impingement plate 15 on the inner circumferential surface of the outer tube 10 to increase the vertical stirring efficiency. After the agitation step is completed, the pressure between the outer cylinder 10 and the inner cylinder 11 is maintained at a constant value.

Thereafter, the pressure equalizing valve 21 and the second discharge valve 27 are closed, the first discharge valve 29 is opened to relieve the pressure of the outer cylinder 10, and the gas inside the inner cylinder 11 is maintained (Step (d)). As a result, the water level of the inner cylinder 11 is slightly lowered, and a part of the treatment liquid flows into the outer cylinder 10 through the water passage 13, so that the water level of the outer cylinder 10 increases, .

When the step (d) is maintained, the biogas is continuously generated in the inner cylinder 11 to form the head difference due to the biogas in the inner cylinder 11 (step (e)).

The first and second discharge valves 29 and 27 are closed and the pressure equalizing valve 21 is opened to cause stirring from the outer tube 10 to the inner tube 11 (step (f)). Therefore, according to the present invention, the step (c) and the step (f) are performed, and the two-way stirring becomes possible.

Thereafter, the first discharge valve 29 and the pressure equalizing valve 21 are closed, the second discharge valve 27 is opened to relieve the pressure of the inner cylinder 11, and the biogas inside the outer cylinder 10 (Step (g)).

The step (g) is maintained to form the head difference caused by the biogas generated in the outer cylinder 10 (step (b)).

As a subsequent step, bidirectional stirring is performed by repeating the above-described step (c) and the subsequent steps.

However, if the biogas generation inside the outer cylinder 10 or the inner cylinder 11 is not smoothly performed, the pressurization pump 30 may be rotated The following steps are performed instead of the above-described steps (b) and (e).

Specifically, the above-described step (b) is performed in such a manner that the first discharge valve 29 and the pressure equalizing valve 21 are closed and the second discharge valve 27 and the first pressurizing valve 23 are opened, (B ') for forcibly forming the water head difference due to the biogas in the outer cylinder 10 by operating the pump 30.

Or the above-mentioned step (e) is carried out by operating the pressurizing pump 30 while keeping the second pressurizing valve 25 open while maintaining the step (d), thereby making the head difference due to the biogas in the inner cylinder 11 (E '). ≪ / RTI >

After the water head difference is forcibly set as described above, after the operation of the pressurizing pump 30 is completed, the first and second pressurizing valves 23 and 25 are closed.

On the other hand, in the case of the conventional abdominal-type reaction tank, steps (a) and (b) described above are repeated. Therefore, it takes a long time to form the head and tail due to the generation of the biogas in the outer cylinder 10. On the other hand, the present invention can shorten the water head difference forming time by partially holding the biogas used in the stirring as in steps (d) and (g) in the inner cylinder 11 or the outer cylinder 10.

While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. something to do.

10: outer tube 11: inner tube
12: inner tube inclined surface 13:
14: outer cylinder slope 15: collision plate
20: Pressure balanced pipe 21: Pressure balanced valve
22: first pressurizing pipe 23: first pressurizing valve
24: second pressurizing pipe 25: second pressurizing valve
26: second discharge piping 27: second discharge valve
28: first discharge pipe 29: first discharge valve
30: pressurizing pump 40: biogas storage tank

Claims (10)

An abdominal-type reaction tank for stirring a treatment liquid in a reaction tank in which an outer tube and an inner tube are communicated,
A pressure balance valve for opening and closing a pressure equalizing pipe connecting the upper portion of each of the outer cylinder and the inner cylinder;
A first discharge valve for opening and closing a first discharge pipe for discharging the biogas in the outer cylinder;
A second discharge valve for opening and closing a second discharge pipe for discharging the biogas in the inner cylinder;
A biogas reservoir connected to an upper portion of each of the outer cylinder and the inner cylinder to receive and store the biogas generated in the outer cylinder and the inner cylinder;
A first pressurizing valve for opening and closing a first pressurizing pipe for supplying the biogas from the biogas reservoir to the outer cylinder;
A second pressurizing valve for opening and closing a second pressurizing pipe for supplying the biogas from the biogas reservoir to the inner cylinder;
A pressurizing pump for pressurizing and supplying the biogas from the biogas storage tank to the outer tube and the inner tube; And
A control valve for selectively controlling the opening and closing of the first and second discharge valves and the pressure equalizing valve and the operation of the pressurizing pump so that the water head difference between the outer cylinder and the inner cylinder is forcibly formed so that the processing liquid alternately moves in both directions, ;
Wherein the reaction vessel is provided with a reaction vessel. The method according to claim 1,
And a plurality of water passages communicating with the outer cylinder are provided in the lower portion of the inner cylinder so that the treatment liquid flows obliquely to the circumferential surface of the inner cylinder. 3. The method of claim 2,
Wherein the bottom portion of the inner cylinder is formed with an inner tube inclined surface inclined downward from the center toward the water passage orifice. 3. The method of claim 2,
Wherein a bottom portion of the outer cylinder is formed with an inclined outer surface inclined downward toward the water inlet. The method according to claim 1,
Wherein a plurality of impingement plates protruding inward is provided on an inner circumferential surface of the outer cylinder so that a vortex is formed inside the outer cylinder when the treatment liquid moves from the inner cylinder to the outer cylinder by the head difference. delete A non-powered stirring method using an abdominal-type reaction tank for stirring a treatment liquid inside a reaction tank in which an outer cylinder and an inner cylinder are communicated,
Wherein the abdominal-type reaction tank comprises: a pressure balance valve for opening and closing a pressure equalizing pipe connecting the upper portion of each of the outer cylinder and the inner cylinder; A first discharge valve for opening and closing a first discharge pipe for discharging the biogas in the outer cylinder; A second discharge valve for opening and closing a second discharge pipe for discharging the biogas in the inner cylinder; And a control unit for selectively controlling opening and closing of the first and second discharge valves and the pressure equalizing valve so that the treating liquid alternately moves in both directions by the head difference of the outer cylinder and the inner cylinder; , ≪ / RTI >
(B) closing the first discharge valve and the pressure equalizing valve and opening the second discharge valve to form a head difference due to the biogas inside the outer cylinder;
(C) closing the first and second discharge valves and opening the pressure equalizing valve to cause agitation from the inner cylinder to the outer cylinder;
(D) closing the pressure equalizing valve and the second discharge valve, and opening the first discharge valve to maintain the biogas in the inner cylinder;
(E) maintaining the step (d) to form a head difference due to the biogas in the inner cylinder;
(F) closing the first and second discharge valves and opening the pressure balance valve to generate agitation from the outer cylinder to the inner cylinder;
(G) closing the first discharge valve, the pressure equalizing valve, and opening the second discharge valve to maintain the biogas inside the outer cylinder; And
(H) maintaining the step (g) to form a head difference due to the biogas in the outer tube; Wherein the non-powered agitation method comprises using the abdominal-type reaction tank. 8. The method of claim 7,
Prior to step (b) above,
(A) sealing the pressure equalizing valve and opening the first and second discharge valves; Further comprising the step of rotating the reaction tube. A non-powered stirring method using the abdominal reaction tank of claim 1,
The first discharge valve and the pressure equalizing valve are closed and the pressure pump is operated in a state in which the second discharge valve and the first pressurizing valve are opened to forcibly form a head difference caused by the biogas inside the outer cylinder, (b ');
(C) closing the first and second discharge valves and opening the pressure equalizing valve to cause agitation from the inner cylinder to the outer cylinder;
(D) closing the pressure equalizing valve and the second discharge valve, and opening the first discharge valve to maintain the biogas in the inner cylinder;
(E) maintaining the step (d) to form a head difference due to the biogas in the inner cylinder;
(F) closing the first and second discharge valves and opening the pressure balance valve to generate agitation from the outer cylinder to the inner cylinder;
(G) closing the first discharge valve and the pressure equalizing valve and opening the second discharge valve to maintain the biogas inside the outer cylinder; And
(H) maintaining the step (g) to form a head difference due to the biogas in the outer tube; Wherein the non-powered agitation method comprises using the abdominal-type reaction tank. A non-powered stirring method using the abdominal reaction tank of claim 1,
(B) closing the first discharge valve and the pressure equalizing valve and opening the second discharge valve to form a head difference due to the biogas inside the outer cylinder;
(C) closing the first and second discharge valves and opening the pressure equalizing valve to cause agitation from the inner cylinder to the outer cylinder;
(D) closing the pressure equalizing valve and the second discharge valve, and opening the first discharge valve to maintain the biogas in the inner cylinder;
(E ') maintaining the step (d) and forcibly forming a head difference due to the biogas in the inner cylinder by operating the pressurizing pump in a state in which the second pressurizing valve is opened;
(F) closing the first and second discharge valves and opening the pressure balance valve to generate agitation from the outer cylinder to the inner cylinder;
(G) closing the first discharge valve and the pressure equalizing valve and opening the second discharge valve to maintain the biogas inside the outer cylinder; And
(H) maintaining the step (g) to form a head difference due to gas inside the outer cylinder; Wherein the non-powered agitation method comprises using the abdominal-type reaction tank.

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