JP5846526B2 - Deodorizing device - Google Patents

Description

  The present invention relates to a deodorization apparatus that removes the original odor of sulfur compounds such as hydrogen sulfide, methyl mercaptan, and methyl sulfide generated from sewage treatment facilities, human waste treatment facilities, and the like.

  2. Description of the Related Art Conventionally, there has been a deodorizing apparatus in which a plurality of shelves are provided inside a deodorizing tower and activated sludge supplied into the deodorizing tower is removed by contacting the raw odor. For example, in the deodorization tower, a shower unit for spraying the activated sludge mixed solution supplied from the sludge circulation tank through a pump into the deodorization tower is provided in the deodorization tower with two or more stages at predetermined intervals. Two or more shelves are installed between the shower units at a predetermined interval, and the shower unit introduces the activated sludge mixed liquid having an activated sludge mixed liquid inlet for introducing the activated sludge mixed liquid. Shower nozzle pipes extending vertically from the pipes are provided, and each shower nozzle pipe is provided with a shower nozzle sprayed with an activated sludge mixed liquid at a predetermined interval. An inlet for introducing odorous gas is provided on the side wall of the deodorization tower, which is lower than the lowest shelf, and the lowest position between the shower units. An overflow pipe for returning the activated sludge mixed liquid overflowing from the bottom shelf to the sludge circulation tank is provided on the side wall of the deodorization tower below the shelf of the stage, and the shelf is provided with odor gas. The diameter of the holes and the opening ratio of the holes are such that the activated sludge mixed liquid stays on the shelf and the holes are not blocked by the activated sludge mixed liquid. The activated sludge mixed liquid is uniformly sprayed into the space immediately below the shower unit by the shower nozzle, thereby forming a flatting portion made of the activated sludge mixed liquid of approximately 1 cm or more on each shelf. A deodorizing apparatus is known (see Patent Document 1).

Japanese Patent No. 4660414

  However, in the above structure, the diameter of the hole formed in the shelf and the opening ratio of the hole are not blocked by the activated sludge mixed solution, but numerical values are set for the opening efficiency. If it is not satisfied, there is a possibility that the activated sludge mixed solution may block the tube, and the drastic improvement with respect to the blocked by the activated sludge mixed solution has not been made.

  Therefore, the present invention solves such problems, and adopts a simple structure to eliminate clogging and pore blockage due to activated sludge and to remove odor components with high efficiency. It is an object to provide a deodorizing apparatus.

In order to solve the above problem, the deodorization apparatus according to claim 1 of the present invention is a deodorization apparatus including a sludge circulation tank in which activated sludge is stored, and a deodorization tower communicating with the sludge circulation tank. The deodorization tower has a plurality of nozzles that cause activated sludge to flow down from above into the deodorization tower through a pump from the sludge circulation tank, and an inclined peripheral surface that is inclined downward toward the circumferential wall of the deodorization tower. A plurality of second guide portions formed along the peripheral wall, having a first guide portion and an inclined peripheral surface that is inclined downward from the peripheral wall of the deodorizing tower toward the inside direction and has a substantially central portion opened. And the first guide portion and the second guide portion are alternately arranged in the vertical direction, and the guide portion that allows the activated sludge flowing down from the nozzle to flow downward is disposed below the guide portion. Toward the original odor airflow inlet and the inclined circumferential surface of the first guide portion. By supplying air Te, it is characterized in further comprising an air supply unit for diffusing the original odor and activated sludge that flows from the original odor inlet upward.

  Moreover, the deodorizing apparatus according to claim 2 of the present invention is the deodorizing apparatus according to claim 1, wherein the air supply unit is configured so that, in the vertical direction, the opening edge of the inclined circumferential surface of the second guide unit and the It arrange | positions between the lower end part of the inclined surrounding surface in a 1st guide part, and air is supplied to a horizontal direction.

  Moreover, the deodorizing apparatus of Claim 3 of this invention is a deodorizing apparatus of Claim 1 or Claim 2, Comprising: The lower end part of the inclined surrounding surface in a said 1st guide part is opening of the said 2nd guide part. It is located on the peripheral wall side of the deodorizing device with respect to the edge.

  Moreover, the deodorizing apparatus according to claim 4 of the present invention is the deodorizing apparatus according to any one of claims 1 to 3, wherein the air supply unit is arranged at a position other than the uppermost position. Air is supplied toward the inclined peripheral surface of the guide portion.

  Moreover, the deodorizing apparatus according to claim 5 of the present invention is the deodorizing apparatus according to any one of claims 1 to 4, wherein the air supply unit is at least equally spaced on a peripheral wall of the deodorizing tower. Three places are provided.

  In the deodorizing apparatus of the present invention, the activated sludge flowing down from the nozzle is caused to flow from the upper side to the lower side on the inclined peripheral surface of the guide portion installed in the deodorizing tower. Can be eliminated. Moreover, since air is supplied toward the inclined peripheral surface of the first guide part, when the activated sludge flows down to the first guide part, it is scattered in the center direction in the deodorizing tower and along the inclined peripheral surface. It can be rolled up with the original odor. As a result, in the diffusion space below the inclined peripheral surface of the first guide portion located above, each air collides, diffuses the activated sludge that is rolled up, and increases the contact time with the original odor. And deodorizing efficiency can be improved.

It is a top view of the deodorizing tower which comprises the deodorizing apparatus in the Example of this invention. It is a longitudinal cross-sectional view of the deodorizing tower which comprises the deodorizing apparatus in the Example of this invention, sludge circulation tank, and explanatory drawing of a pump. It is the elements on larger scale of FIG. 2 of the deodorizing tower which comprises the deodorizing apparatus in the Example of this invention.

  Hereinafter, a deodorizing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the deodorizing apparatus 1 according to the present invention allows the raw odor containing sulfur-based components to flow from below and efficiently converts the activated sludge flowing down from above into the original odor while diffusing with air. It is made to contact and neutralize and remove a sulfur type component, and a processing odor is made to flow out from the upper part.

  The deodorizing apparatus 1 includes a deodorizing tower 2 mainly including an air supply unit, a guide unit including a first guide unit 3 and a second guide unit 4 installed in the deodorizing tower 2, a nozzle 5, and a deodorizing tower. 2 and the sludge circulation tank 7 in which the activated sludge discharged from 2 is stored.

  As shown in FIGS. 1 and 2, the deodorization tower 2 is formed in a substantially cylindrical shape. The deodorizing tower 2 is provided with two original odor airflow inlets 20 for the original odor so as to face the peripheral walls at the lower position. Further, a part of the upper end surface of the deodorizing tower 2 is provided with a processed odor airflow outlet 21 for discharging the processed odor.

  In addition, a guide part for allowing the activated sludge to flow downward is provided inside the deodorization tower 2. The guide unit includes a first guide unit 3 and a second guide unit 4. As shown in FIG. 2, a plurality of the first guide portions 3 and the second guide portions 4 are alternately arranged in the vertical direction with a predetermined interval.

  The 1st guide part 3 is formed in the cone shape with low height, for example, and has a taper-shaped inclination surrounding surface which inclines below toward the surrounding wall direction of the deodorizing tower 2. As shown in FIG. The inclination angle of the inclined peripheral surface may be an angle at which the activated sludge can flow from the upper side to the lower side. The upper part of the inclined peripheral surface is a top part 31, and the lower circumferential edge part is a lower end part 32. The first guide portion 3 is supported by a column (not shown) installed on the peripheral wall of the deodorization tower 2 so that the top portion 31 is located at the approximate center of the deodorization tower 2 in plan view. Further, the lowermost first guide portion 3 is provided above the original odor airflow inlet 20. In the present embodiment, the first guide portion 3 is provided in three stages.

  Further, between the first guide portions 3 arranged above and below, a second guide portion 4 that is inclined downward from the peripheral wall of the deodorizing tower 2 toward the inside is provided. The second guide portion 4 is formed in, for example, a conical shape having a low height, and has a tapered inclined peripheral surface that is inclined downward. The inclination angle of the inclined peripheral surface may be an angle at which the activated sludge can flow from the upper side to the lower side. Moreover, the 2nd guide part 4 is provided along the internal peripheral surface of the deodorizing tower 2, and it is set as the state which the substantially center part opened. The opened circular peripheral edge is an opening edge 41. That is, the second guide portion 4 is provided along the peripheral wall of the deodorizing tower 2 in a state where the first guide portion 3 is inverted, and has a shape with an open substantially central portion.

  At this time, the lower end portion 32 of the inclined circumferential surface of the first guide portion 3 is located closer to the peripheral wall side of the deodorization tower 2 than the opening edge portion 41 of the second guide portion 4. Specifically, it arrange | positions in the state located slightly to the surrounding wall side from the opening edge part 41. FIG. For example, the ratio between the diameter of the opening edge portion 41 in the second guide portion 4 and the diameter of the lower end portion 32 in the first guide portion 3 is about 1: 1. Thereby, activated sludge can be efficiently flowed from the 1st guide part 3 to the 2nd guide part 4, and also from the 2nd guide part 4 to the 1st guide part 3 below.

  In addition, a nozzle 5 that allows the activated sludge to flow toward the top portion 31 is provided above the uppermost first guide portion 3 inside the deodorization tower 2. On the other hand, an inclined portion 6 for discharging activated sludge to the outside through a discharge port 22 is provided below the lowermost first guide portion 3 inside the deodorization tower 2.

  A plurality of air supply ports 23 for supplying air to the inside are provided on the peripheral wall of the deodorization tower 2. The air supply port 23 is arranged so that air can be supplied toward the first guide portion 3 located in the center among the plurality of first guide portions 3 arranged. More specifically, the air supply port 23 is arranged so that air is supplied along the inclined circumferential surface of the first guide portion 3. An air supply pipe 9 is connected to the air supply port 23, and these are combined into an air supply unit. The air supply pipe 9 is formed to have a diameter larger than that of the air supply port 23, and the flow rate of the air supplied into the deodorizing tower 2 may be changed, or an opening valve for changing the flow rate of the air to the air supply port 23 ( (Not shown) may be provided.

  In the present embodiment, as shown in FIG. 1, three air supply ports 23 are provided at equal intervals on the peripheral wall of the deodorizing tower 2, and as shown in FIG. Air is supplied toward More specifically, the substantially central portion of the air supply port 23 is disposed on a virtual horizontal line passing through the top portion 31, the lower end portion 32 is disposed below the air supply port 23, and the opening edge portion 41 is supplied with air. It is arranged above the mouth 23. That is, the air supply port 23 is disposed between the opening edge portion 41 and the lower end portion 32 in the vertical direction, and air is supplied in the horizontal direction.

  For example, the ratio of the diameter D1 of the air supply port 23, the diameter D2 of the lower end 32 in the first guide 3 and the diameter D3 of the deodorizing tower 2 is about 1: 8: 16. Further, as shown in FIG. 3, the angle α formed between the virtual line along the inclined circumferential surface and the virtual horizontal line in the first guide portion 3 is approximately 15 degrees. Furthermore, the diameter D1 of the air supply port 23 and the vertical dimension from the top portion 31 to the lower end portion 32 of the first guide portion 3 are substantially equal. As a result, air can be supplied toward the first guide portion 3, the air can be rolled up along the inclined circumferential surface, and the space below the inclined circumferential surface in the first guide portion 3 can be increased. A wide range can be secured.

  In the deodorizing apparatus 1 configured as described above, the original odor is introduced from the original odor airflow inlet 20 into the deodorizing tower 2 by a fan (not shown). And the inflow original odor rises through the space which the 1st guide part 3 and the 2nd guide part 4 form, and is discharged | emitted from the process odor airflow exit 21 outside.

  On the other hand, the activated sludge 9 flowing down from the nozzle 5 passes through the first guide part 3 and the second guide part 4 alternately, and is discharged from the discharge port 22 to the sludge circulation tank 7 constituting the deodorizing apparatus 1, Then, it is supplied again to the nozzle 5 via 8. The activated sludge concentration of the activated sludge 9 in this embodiment is 6000 to 12000 ppm.

  When the raw odor passes through the deodorizing tower 2, the activated sludge 9 flows down from the nozzle 5 and accumulates on the first guide part 3 and the second guide part 4, and from the first guide part 3 to the second guide part 4. The activated sludge 9 that flows down and the activated sludge 9 that flows down from the second guide portion 4 to the first guide portion 3 neutralizes and removes sulfur-based odor components. Specifically, the sulfur compound is oxidized by sulfur-oxidizing bacteria into sulfate ions.

  And the activated sludge 9 which flowed down to the lower part of the deodorizing tower 2 is supplied to the sludge circulation tank 7 through the inclination part 6, and the aeration tank (not shown) in the sludge circulation tank 7 and a water treatment water tank (not shown). After passing, the PH value is maintained at 7 to 8 and is circulated into the deodorization tower 2 through the nozzle 5 by the pump 8.

  Here, the contact between the raw odor caused by the air supplied by the air supply unit and the activated sludge 9 will be described with reference to FIG. The activated sludge 9 that has flowed down from the nozzle 5 flows from the upper side to the lower side along the inclined peripheral surfaces of the first guide part 3 and the second guide part 4. At this time, activated sludge 9 is deposited on the first guide part 3 and the second guide part 4 by about 2 mm.

  And when the activated sludge 9 which flowed down from the uppermost 1st guide part 3 to the 2nd guide part 4 flows down to the 1st guide part 3 below, it goes toward the inclined surrounding surface of the 1st guide part 3. Since air is supplied, as shown by the arrow in the figure, after being scattered in the center direction in the deodorizing tower 2, it is wound upward together with the original odor rising along the inclined peripheral surface.

  At this time, since air is supplied into the deodorizing tower 2 from three places, in the diffusion space below the inclined peripheral surface in the uppermost first guide section 3 at the center of the deodorizing tower 2. Each air collides, diffuses the activated sludge 9 wound up, and comes into contact with the original odor more efficiently. Thereby, contact time can be increased and deodorizing efficiency can be improved.

  As described above, according to the deodorizing apparatus 1 according to the present invention described above, the activated sludge flowing down from the nozzle 5 is caused to flow from the upper side to the lower side on the inclined peripheral surface of the guide portion installed in the deodorizing tower 2. It is possible to eliminate clogging and pore clogging caused by active activated sludge. Moreover, since air is supplied toward the inclined peripheral surface of the first guide part 3, when the activated sludge 9 flows down to the first guide part 3, it is scattered toward the center in the deodorizing tower 2, and the inclination It can be rolled up together with the original odor that has risen along the peripheral surface. Thereby, in the diffusion space below the inclined peripheral surface of the first guide portion 3 positioned above, each air collides, diffuses the activated sludge 9 that has been wound up, and increases the contact time with the original odor. And deodorizing efficiency can be improved.

  The present invention is not limited to the configuration of the above-described embodiment, and can be implemented by appropriately changing the shape, dimensions, material, and the like of the guide portion. Specifically, the second guide 4 can be arranged above the uppermost first guide 3 and the activated sludge can flow down from the nozzle 5 toward the inclined peripheral surface of the second guide 4. . Furthermore, the air supplied toward the 1st guide part 3 should just supply air toward the inclined surrounding surface of 1st guide parts 3 other than the 1st guide part 3 arrange | positioned in the uppermost part. Yes, a plurality of air supply units can be arranged in the vertical direction. Of course, a part of the configuration can be omitted, and a part of the configuration can be extracted.

DESCRIPTION OF SYMBOLS 1 Deodorizing apparatus 2 Deodorizing tower 20 Original odor airflow inlet 21 Process odor airflow outlet 22 Outlet 23 Air supply port 3 1st guide part 31 Top part 32 Lower end part 4 2nd guide part 41 Opening edge part 5 Nozzle 6 Inclination part 7 Sludge circulation Tank 8 Pump 9 Air supply pipe

Claims (5)

A deodorization apparatus comprising a sludge circulation tank in which activated sludge is stored, and a deodorization tower communicating with the sludge circulation tank,
The deodorization tower is
A nozzle that causes activated sludge to flow down from above into the deodorization tower via a pump from the sludge circulation tank;
A plurality of first guide portions having inclined peripheral surfaces inclined downward toward the peripheral wall direction of the deodorization tower, and an inclination that is inclined downward from the peripheral wall of the deodorization tower toward an inner direction and has a substantially central portion opened. A plurality of second guide portions having a peripheral surface and formed along the peripheral wall, wherein the first guide portions and the second guide portions are alternately arranged in a vertical direction, and the nozzle A guide section for flowing the activated sludge flowing down from the bottom,
Original odor airflow inlet disposed below the guide part,
A deodorizing method comprising: an air supply unit that diffuses upward the raw odor and activated sludge flowing in from the original odor airflow inlet by supplying air toward the inclined peripheral surface of the first guide unit apparatus.   The air supply unit is disposed between an opening edge portion of the inclined circumferential surface of the second guide portion and a lower end portion of the inclined circumferential surface of the first guide portion in the vertical direction, and air is supplied in the horizontal direction. The deodorizing apparatus according to claim 1.   3. The deodorizing apparatus according to claim 1, wherein a lower end portion of the inclined peripheral surface of the first guide portion is located closer to a peripheral wall side of the deodorizing device than an opening edge portion of the second guide portion.   The deodorizing apparatus according to any one of claims 1 to 3, wherein the air supply unit supplies air toward an inclined circumferential surface of the first guide unit arranged at a position other than the uppermost part. The deodorization apparatus according to any one of claims 1 to 4, wherein the air supply unit is provided at least at three locations on the peripheral wall of the deodorization tower at equal intervals.

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