Sludge settling separation equipment

Abstract

The sludge settling separation equipment comprises a tank body, the tank body is internally composed of a gas collecting area, a settling area and a sludge storage area, the gas collecting area is provided with a gas outlet, the side wall of the settling area is provided with a sludge feeding pipe and a water outlet, the sludge storage area is in an inverted cone shape, and the bottom of the sludge storage area is provided with a sludge discharging pipe; the rotational flow inner part is arranged in the settling area, the rotational flow inner part is a cylinder body with the pipe diameter reduced from top to bottom, an opening in the bottom of the rotational flow inner part is a mud outlet, the top of the rotational flow inner part is closed, a clear liquid outlet is formed in the rotational flow inner part, and a feeding hole is formed in the side wall of the rotational flow inner part and is communicated with the sludge feeding pipe; and the baffle inner piece consists of a cylinder and a plurality of groups of baffle plates on the side wall of the cylinder. Compared with the prior art, the sludge settling separation equipment provided by the utility model can effectively improve the flowing and distribution characteristics of sludge and shorten the sludge settling separation time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of solid-liquid separation, more particularly to sludge sedimentation separation equipment in the field of environmental protection. BACKGROUND

[0002] In the petroleum refining enterprise, some dregs, sludge, oil sludge and the like will inevitably be produced. In order to further treat the sludge effectively and economically, it is necessary to first concentrate. Sludge concentration is an effective method for reducing the water content of sludge and reducing the volume of sludge, which is suitable for sludge with high water content, such as activated sludge, which has a water content of about 99%. When the water content of the sludge is reduced from 99% to 96%, the volume of the sludge can be reduced to 1 / 4 of the original. The water content of the concentrated sludge is generally 95-97%, and the sludge after concentration is nearly paste-like and still maintains fluidity. During the process of sludge sedimentation, environmental pollution caused by odor often occurs.

[0003] The traditional sludge concentration tank often uses gravity concentration method to mainly reduce the interstitial water of the sludge. The top of the tank body of the traditional sludge concentration tank is provided with a feed pipe, and the bottom is provided with a sludge outlet pipe. The sludge and water enter the tank body through the feed pipe, and then stand still in the tank body for 12 to 48 hours. The sludge is deposited at the bottom of the tank body and is discharged through the sludge outlet pipe, and the supernatant is discharged through the water outlet pipe provided at the top of the tank body.

[0004] CN202754885U discloses a sludge concentration tank, which comprises a tank body, a deceleration motor, upper and lower layer stirring blades, a support and a sliding bearing, a pump, an overflow port and a supernatant discharge port. The sludge is compressed by its own gravity, and the sedimentation and flocculation effect is good, but the stirring device is provided, and the operation is relatively complex.

[0005] CN215026239U discloses a concentrated slurry tank, which comprises a storage tank, a slurry inlet pipe, a central feed cylinder, an inclined plate group, a tooth-shaped overflow weir and an overflow pipe. The slurry sedimentation effect can be effectively improved, and the solidification efficiency is improved by pre-concentration of the slurry.

[0006] CN107473555A discloses a sludge concentration tank, which comprises a tank body, a sludge inlet device is arranged on the side wall of the tank body, and a sludge discharge pipe is arranged at the bottom of the tank body. The sludge inlet device comprises a sludge inlet pipe, a sludge guide pipe and a reflection plate. The sludge inlet pipe is horizontally arranged, the sludge inlet pipe is perpendicular to the sludge guide pipe, the sludge guide pipe is located at the center of the tank body, the reflection plate is in the shape of an inverted bucket, and the reflection plate is arranged at the bottom of the sludge guide pipe. A strip-shaped slot is arranged on the side wall of the sludge guide pipe, and a buffer plate is arranged in the slot. The speed of the sludge entering the tank body can be effectively slowed down to prevent the sludge from splashing water. Although the existing reported sludge concentration equipment has certain improvement compared with the traditional equipment, there are still problems such as low efficiency of concentrating sludge, difficulty in discharging sludge when standing still for a long time, sludge water content not meeting the standard, odor pollution and the like. Therefore, it is urgent to design a sludge concentration equipment with high efficiency of gas, liquid and solid separation. SUMMARY

[0007] The utility model wants to solve the technical problem of solving the problem of low sludge concentration efficiency, air pollution and large floor space in the prior art, and provides a sludge settling and separating device suitable for sludge concentration treatment of different water content.

[0008] The utility model provides a kind of sludge settling and separating device, comprising:

[0009] Tank body, tank body inside is by gas collection zone, sedimentation zone and storage mud area from top to bottom, the gas collection zone is equipped with gas outlet, the sedimentation zone side wall is equipped with sludge feed pipe and drain, the storage mud area is inverted cone, bottom is equipped with sludge discharge pipe;

[0010] Rotational flow inner part, be set in the sedimentation zone, the rotational flow inner part is by top to bottom tube diameter reduces cylinder, bottom opening is slurry outlet, top is closed and is equipped with clear liquid outlet, the rotational flow inner part side wall is equipped with feed port and the sludge feed pipe intercommunication;

[0011] Baffling inner part, be set in the annular space between tank body inner wall and the rotational flow inner part, by cylinder and cylinder side wall on multiple groups of inclined downward baffle plate.

[0012] The application method of the sludge settling and separating device provided by the utility model, sludge raw material enters sludge concentration equipment through sludge feed pipe, first enters rotational flow inner part, under the action of centrifugal force, heavier mud sinks, lighter clear liquid and a small amount of mud are introduced into the lower part of clear liquid zone through clear liquid port and flow guide pipe, then after passing through layer after layer of baffle plate of baffling inner part, clear liquid rises, sludge descends, prolongs sedimentation time, improves sedimentation effect.Clarified liquid is discharged through drain, concentrated sludge is settled in storage mud area, and settled sludge can be discharged through sludge discharge port.Gas is discharged from the gas outlet of collection zone.

[0013] The sludge settling and separating device provided by the utility model has the beneficial effects that:

[0014] Compared with prior art, the sludge settling and separating device provided by the utility model preliminarily separates sludge, clear liquid and gas, simultaneously realizes gas-liquid-solid three-phase separation effect.Tank body is equipped with rotational flow inner part, which can effectively improve the flow and distribution characteristics of sludge and shorten the sedimentation time.Baffling inner part in tank body can make sludge in clear liquid realize secondary settlement, improve concentration and sedimentation effect, and has high working efficiency and separation efficiency.The sludge settling and separating device provided by the utility model adopts vertical structure, can be used for intermittent or continuous operation, has the characteristics of compact structure and small floor space. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structural schematic diagram of the first embodiment of sludge settling and separating device.

[0016] Figure 2 is a structural schematic view of a cyclone inner part. Figure 3 is a cross-sectional view of a baffle inner part.

[0017] Figure 4 is a top view of a baffle inner part.

[0018] Figure 5 is a structural schematic view of a second embodiment of a sludge sedimentation separation device.

[0019] Figure 6 is a schematic view of a vertical flow type sludge sedimentation tank.

[0020] wherein:

[0021] 1 - sludge feed 2 - cyclone internals 3 - baffle internals 4 - gas outlet 5 - drain 6 - sludge discharge 7 - gas collection zone 10 - level gauge access 8 - settling zone 9 - sludge storage zone 2-1 - straight section 2-2 - reduced section 2-3 - clear liquid outlet 2-4 - flow guide 2-5 - baffle 3-1 - hollow cylinder DETAILED DESCRIPTION

[0022] The following detailed description of the present application is provided.

[0023] In the present application, the terms "upper", "lower", "bottom" are based on the relative position of the container or component. Among them, the "bottom" refers to the position of 0-10% from the bottom to the top of the container, and the "top" refers to the position of 90-100% from the bottom to the top of the container.

[0024] In the present application, the orientation words such as "up, down, left, right, inner, outer, top, bottom" used without the opposite description indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0025] The present application provides a sludge sedimentation separation device, comprising:

[0026] The tank body is composed of a gas collection zone, a sedimentation zone and a sludge storage zone from top to bottom inside the tank body, the gas collection zone is provided with a gas outlet, the side wall of the sedimentation zone is provided with a sludge feeding pipe and a drainage port, and the sludge storage zone is inverted conical and provided with a sludge discharge pipe at the bottom;

[0027] The cyclone inner part is arranged in the sedimentation zone, the cyclone inner part is a cylinder with a decreasing pipe diameter from top to bottom, the bottom opening is a slurry outlet, the top is closed and provided with a clear liquid outlet, and the side wall of the cyclone inner part is provided with a feeding port in communication with the sludge feeding pipe.

[0028] The baffle inner part is arranged in the annular space between the inner wall of the tank body and the cyclone inner part, is a cylinder, and is provided with a plurality of groups of downwardly inclined baffle plates inside and outside the side wall.

[0029] The top of the tank body is a curved surface; the gas outlet is located at the upper portion or / and the side of the gas collection area; the height ratio of the gas collection area, the sedimentation area and the sludge storage area is 1:5-20:2-10; and the taper angle of the sludge storage area is 35-70°.

[0030] Optionally, the cyclone inner member is composed of an upper straight cylinder segment and a lower reduced diameter segment, the bottom opening of the reduced diameter segment is a slurry outlet, a flow baffle is arranged below the slurry outlet, the feed inlet is tangent to the wall of the straight cylinder segment, the clear liquid outlet extends into the straight cylinder segment and is connected with a downwardly bent flow guide pipe, and the straight cylinder segment accounts for 10%-70% of the total height.

[0031] Optionally, in the cyclone inner member, the diameter ratio of the inlet end to the outlet end of the reduced diameter segment is 2-10:1, and the included angle a between the wall of the reduced diameter segment and the wall of the straight cylinder segment is 100°-175°.

[0032] Optionally, the diameter ratio of the inlet end to the outlet end of the reduced diameter segment is 2-5:1, and the included angle a between the wall of the reduced diameter segment and the wall of the straight cylinder segment is 140°-170°.

[0033] Optionally, the flow baffle is a conical surface and is fixed on the bottom of the cyclone inner member through a support rod, the diameter of the flow baffle is 0.8-1.4 times, preferably 1-1.3 times, of the diameter of the outlet of the cyclone inner member, and the distance between the flow baffle and the outlet of the cyclone inner member is 0.1-1 m, preferably 0.25-0.5 m.

[0034] Optionally, the diameter ratio of the cylinder of the baffle inner member to the tank body is 0.5-0.9:1, the height of the baffle inner member is 50%-90% of the height of the sedimentation area, and the diameter ratio of the straight cylinder segment of the cyclone inner member to the tank body is 0.1-0.5:1.

[0035] Optionally, in the baffle inner member, the baffle plates are arranged in rows in a staggered or parallel manner on the inner wall and the outer wall of the cylinder, the baffle plates are rectangular, the length of the baffle plates is 1 / 20-1 / 10 of the height of the cylinder, and the width of the baffle plates is 1 / 20-1 / 8 of the circumference of the cylinder.

[0036] Optionally, in the baffle inner member, 3-20 baffle plates are arranged in parallel to form a row, and 3-6 rows of baffle plates are arranged on the wall of the cylinder.

[0037] Optionally, in the baffle inner member, the included angle between the baffle plates and the vertical direction is 20-80 degrees, preferably 30-60 degrees.

[0038] In the utility model, the sludge sedimentation and separation equipment is a vertical structure, comprising a tank body, internal components, inlet and outlet pipe interfaces and corresponding detection ports.

[0039] In one embodiment, the gas outlet is located at the upper portion or / and side of the gas collection area, and can be symmetrically arranged or arranged along the circumference, and the area of the gas outlet accounts for 1%-10% of the total area of the top portion. The precipitation area is provided with a cyclone inner member and a baffle inner member from the center to the outside. The cyclone inner member is composed of a straight cylinder section and a reduced diameter section, and the bottom of the reduced diameter section is provided with an opening. A sludge feeding pipe extends into the tank body and communicates with a feeding port of the cyclone inner member. The fluid flow direction of the feeding port is tangent to the side wall of the straight cylinder section. The upper end of the straight cylinder section is provided with a liquid outlet extending into the pipe, and the liquid outlet is connected with a flow guide pipe to downwardly flow. The bottom end of the straight cylinder section communicates with the reduced diameter section.

[0040] After the sludge raw material enters the sludge thickening tank through the sludge feeding pipe, the sludge enters the cyclone inner member along the tangent direction at the feeding port of the cyclone inner member, and the cyclone is formed in the straight cylinder section and the reduced diameter section. The relatively heavy sludge flows out of the reduced diameter section and contacts the flow blocking plate to avoid causing a large impact on the settled sludge layer. The relatively light clear liquid flows out upwardly along the flow guide pipe, and the relatively light water flows back upwardly after passing through the baffle inner member. The relatively heavy sludge flows downwardly to realize a secondary settling process. Then, the clear liquid is discharged from the drain port of the tank wall. The drain port is preferably arranged at 2-6 from top to bottom on the side wall of the tank body. The sludge enters the sludge storage area and is discharged from the sludge discharge pipe.

[0041] In one preferred embodiment, the ratio of the diameter of the inlet end of the reduced diameter section of the cyclone inner member to the diameter of the outlet end is 2-5:1; and the taper angle α between the pipe wall of the reduced diameter section and the pipe wall of the straight cylinder section is 140°-170°.

[0042] In one preferred embodiment, the flow blocking plate is provided directly below the cyclone inner member, and the flow blocking plate is fixed to the bottom of the cyclone inner member by a plurality of supporting rods. The distance between the flow blocking plate and the outlet of the cyclone inner member is 0.12-0.5m. Preferably, the flow blocking plate is a conical surface, the bottom diameter of the conical surface is 0.8-1.4 times, preferably 1-1.3 times, the diameter of the outlet of the cyclone inner member, and the maximum internal angle of the conical surface is 120°-175°, preferably 150°-160°.

[0043] In one embodiment, the baffle inner member is composed of a cylinder and a plurality of downwardly inclined baffle plates, the baffle plates are arranged in parallel, and 3-6 rows of baffle plates are arranged along the circumference of the cylinder. On the vertical section of the baffle inner member, the angle between the baffle plate and the vertical direction is 30-60 degrees. In one embodiment, the sludge storage area is located in the lower portion of the tank body and has a conical structure, and the inclination angle is 40-70 degrees, preferably 45-60 degrees. The sludge discharge pipe can be connected to the bottom of the conical structure.

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. However, the drawings and embodiments do not constitute a limitation on the present application.

[0045] The present application is not limited to the embodiments described above. 3-2 - baffleThe utility model discloses a sludge sedimentation separation equipment first embodiment structure schematic drawing. Figure 1 As shown in the drawing, the sludge sedimentation separation equipment includes a tank body, a cyclone inner part 2 and a baffle inner part 3 in the tank body, the cyclone inner part 2 is arranged at the center of the tank body, and the cyclone inner part includes a straight cylinder section, a reduced diameter section, a flow guide pipe and a flow baffle. Figure 1 The utility model discloses a cyclone inner part structure schematic drawing. Figure 2 As shown in the drawing, the cyclone inner part is composed of the straight cylinder section 2-1 at the upper part and the reduced diameter section 2-2 at the lower part, and the straight cylinder section is provided with a feeding port and communicated with a sludge feeding pipe.The outlet 2-3 of the cyclone inner part extends into the upper end pipe of the straight cylinder section at one end, and is connected with the flow guide pipe 2-4 at the other end and downwardly baffle, and the lower opening of the reduced diameter section 2-2 is a slurry outlet, and the flow baffle 2-5 is arranged below the slurry outlet.

[0046] The utility model discloses a baffle inner part sectional view. Figure 2 The utility model discloses a baffle inner part top view. Figure 3 As shown in the drawing, the baffle inner part is composed of a cylinder 3-1 with openings at both ends and a baffle plate 3-2, and a plurality of baffle plates 3-2 are arranged in the side wall of the cylinder 3-1. Figure 4 Figure 4 The utility model discloses a sludge sedimentation separation equipment second embodiment structure schematic drawing.As shown in the drawing, the baffle inner part is composed of a cylinder 3-1 with openings at both ends and a baffle plate 3-2, and a plurality of baffle plates 3-2 are arranged in the side wall of the cylinder 3-1.

[0047] The application effect of the sludge sedimentation separation equipment provided by the utility model will be further illustrated by examples. Figure 5 Figure 5 The properties of the sludge raw materials to be treated in the examples and comparative examples are shown in Table 1.

[0048] Table 1

[0049] Example 1

[0050] Example 1

[0051]

[0052] Comparative Example 1

[0053] Comparative Example 1 is a continuous sludge sedimentation concentration process, and the properties of the sludge are shown in Table 1. Figure 1The vertical flow sludge settling tank has a tank body with an inner diameter of 2000 mm and a height of 3760 mm, and a central pipe with a diameter of 240 mm. The sludge raw material is pumped into the central pipe inlet by a sludge pump, the sludge settling tank adopts static water pressure sludge discharge, and the supernatant is discharged in a peripheral water outlet mode. Embodiment

[0054] The sludge feed used in the embodiment 1 is the same as that in the comparative example 1, and the sludge settling separation equipment is as shown in the accompanying drawings. Figure 6 The sludge settling separation equipment is a vertical settling tank, which is composed of a gas collection zone, a sedimentation zone and a sludge storage zone from top to bottom, and three gas outlets with a diameter of 100 mm are arranged in the top gas collection zone. The tank body has an inner diameter of 1800 mm and a height of 4500 mm, the sludge storage zone has a height of 1000 mm and a cone angle of 50 degrees. The sedimentation zone is provided with a cyclone inner part and a baffle inner part. The cyclone inner part has a diameter of 300 mm, is reduced to 150 mm in diameter, and has a cone angle of 20 degrees. The baffle plate has a diameter of 330 mm and a maximum inner angle of 155 degrees, and is 200 mm away from the outlet of the cyclone inner part. The baffle inner part is composed of a hollow cylinder and a baffle plate connected to the inner wall of the cylinder. The cylinder has a diameter of 1400 mm and is provided with four rows of baffle plates. Each row of baffle plates is arranged in parallel and inclined downward, and the baffle plate has an angle of 60 degrees with the vertical direction. The sludge first enters the tank body through a sludge feeding pipe, enters the cyclone inner part through the feeding port, forms a cyclone in the cyclone inner part, and is further separated under the action of centrifugal force. The sludge enters the sludge storage zone and is discharged as concentrated sludge through a sludge discharge pipe. The supernatant enters the sedimentation zone through a guide pipe through the liquid outlet, and the further settled supernatant is discharged through a water outlet. The sludge settling results are shown in Table 2. Embodiment

[0055] The sludge settling separation equipment is as shown in the accompanying drawings. Figure 1 Figure 1 The sludge settling separation equipment is as shown in the accompanying drawings.

[0056] Table 2

[0057]

[0058] As shown in Table 2, when the sludge tank of the utility model is continuously operated, the settling time is reduced by more than one time under the same treatment capacity, and the concentration efficiency can be improved.

Claims

1. A sludge settling and separation device, characterized in that, include: The tank body consists of a gas collection zone, a sedimentation zone, and a sludge storage zone from top to bottom. The gas collection zone is equipped with a gas outlet. The sedimentation zone has a sludge inlet pipe and a drain outlet on its side wall. The sludge storage zone is inverted cone-shaped and has a sludge discharge pipe at the bottom. The cyclone internal component is set in the sedimentation zone. The cyclone internal component is a cylindrical body with a diameter decreasing from top to bottom. The bottom opening is a sludge outlet, and the top is closed and has a clear liquid outlet. The side wall of the cyclone internal component has a feed inlet that is connected to the sludge feed pipe. The baffle internals are located in the annular space between the inner wall of the tank and the swirling internals, and consist of a cylinder and multiple sets of downward-sloping baffles on the side wall of the cylinder.

2. The sludge settling and separation equipment according to claim 1, characterized in that, The top of the tank is curved; the gas outlet is located on the upper part and / or side of the gas collection area; the height ratio of the gas collection area, sedimentation area and sludge storage area is 1:5-20:2-10; the cone angle of the sludge storage area is 35-70°.

3. The sludge settling and separation equipment according to claim 1, characterized in that, The swirl internals consist of an upper straight section and a lower narrowed section. The bottom opening of the narrowed section is a mud outlet, and a baffle plate is provided below the mud outlet. The feed inlet is tangent to the wall of the straight section, and the clear liquid outlet extends into the straight section and is connected to a downward-turning guide pipe. The straight section is 10%-70% of the total height.

4. The sludge settling and separation equipment according to claim 3, characterized in that, The diameter ratio of the inlet end to the outlet end of the reduced diameter section is 2-10:1, and the included angle α between the pipe wall of the reduced diameter section and the pipe wall of the straight section is 100°-175°.

5. The sludge settling and separation equipment according to claim 4, characterized in that, The diameter ratio of the inlet end to the outlet end of the reduced diameter section is 2-5:1; the included angle α between the pipe wall of the reduced diameter section and the pipe wall of the straight section is 140°-170°.

6. The sludge settling and separation equipment according to claim 3, characterized in that, The baffle plate is a conical surface and is fixed to the bottom of the vortex internal component by a support rod; the diameter of the baffle plate is 0.8-1.4 times the outlet of the vortex internal component; the distance between the baffle plate and the outlet of the vortex internal component is 0.1-1m.

7. The sludge settling and separation equipment according to claim 6, characterized in that, The diameter of the baffle plate is 1-1.3 times the outlet of the swirl internal component; the distance between the baffle plate and the outlet of the swirl internal component is 0.25-0.5m.

8. The sludge settling and separation equipment according to claim 1, characterized in that, In the aforementioned baffle internals, the baffle plates are arranged alternately or in parallel rows on the inner and outer walls of the cylinder. The baffle plates are rectangular, with a length of 1 / 20 to 1 / 10 of the cylinder height and a width of 1 / 20 to 1 / 8 of the cylinder circumference.

9. The sludge settling and separation equipment according to claim 8, characterized in that, In the aforementioned baffle internals, 3-20 baffles are arranged in parallel to form a row, and 3-6 rows of baffles are arranged on the cylindrical wall.

10. The sludge settling and separation equipment according to claim 1, characterized in that, On the vertical section of the baffle internals, the angle between the baffle plate and the vertical direction is 20-80 degrees.

11. The sludge settling and separation equipment according to claim 10, characterized in that, On the vertical section of the baffle internals, the angle between the baffle plate and the vertical direction is 30-60 degrees.

12. The sludge settling and separation equipment according to any one of claims 1-11, characterized in that, The diameter ratio of the inner baffle cylinder to the tank body is 0.5-0.9:1, the height of the inner baffle is 50%-90% of the sedimentation zone, and the diameter ratio of the straight section of the inner vortex to the tank body is 0.1-0.5:1.

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