Efficient sedimentation tank

Abstract

The utility model relates to the technical field of sewage sedimentation tanks, in particular to an efficient sedimentation tank which comprises a sedimentation tank body, a reaction tank, a pre-sedimentation concentration tank and an inclined tube separation tank, the reaction tank comprises a rectifying pipe, a water inlet pipe, a cylinder and a supporting plate, the rectifying pipe is fixedly connected with the sedimentation tank body and penetrates through the sedimentation tank body, the water inlet pipe is fixedly connected with the rectifying pipe and located on the outer side of the water inlet pipe, the cylinder is fixedly connected with the sedimentation tank body and located in the sedimentation tank body, and the supporting plate is fixedly connected with the cylinder and located on the top of the cylinder; the pre-sedimentation concentration tank and the inclined tube separation tank are respectively connected with the sedimentation tank body, so that the problems that a partition plate flocculation tank is arranged in a common coagulating sedimentation process, but the partition plate flocculation tank is relatively large in volume and relatively large in head loss, flocs at a turning part are easy to break, and the water outlet flow is difficult to distribute uniformly are solved.

Description

Technical Field

[0001] This utility model relates to the field of sewage sedimentation tank technology, and in particular to a high-efficiency sedimentation tank. Background Technology

[0002] High-efficiency sedimentation tanks are water treatment structures that integrate coagulation reaction and sedimentation. They have the advantages of high surface load, small footprint, and good effluent quality.

[0003] The traditional approach is to set up separate structures with independent functions. This facility actually recombines mixing, flocculation, and sedimentation in a better way. Mixing and flocculation are done mechanically and are frequently used in engineering. Sedimentation often uses inclined tube (plate) devices. Inclined tube (plate) sedimentation technology was applied in sewage treatment as early as the 1980s and has been working normally for the past 20 years. Due to the reasonable combination of mixing, flocculation and inclined tube sedimentation, the new high-efficiency sedimentation tank has the following advantages: (1) High hydraulic load, the surface load of sedimentation is about 10-20 m³ / m²·h, which greatly exceeds the surface load of conventional sedimentation tanks; (2) High pollutant removal rate, the removal rates of CODCr, BOD5 and SS can reach 60%, 60% and 85% respectively; (3) Due to the common use of small-proportion recirculation, the internal circulation of the reaction tank is strengthened and the external sludge circulation is increased, which increases the probability of intermolecular contact, so that the flocculant is fully utilized in the circulation, reducing the amount of reagent added and reducing the operating cost; (4) The sludge separated in the sedimentation zone is concentrated in the thickening zone to increase the sludge moisture content, so that the sludge moisture content reaches more than 95%.

[0004] However, common coagulation sedimentation processes include baffle flocculation tanks, but baffle flocculation tanks have a large volume, resulting in a large head loss, easy breakage of flocs at the turning points, and uneven distribution of effluent flow. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency sedimentation tank that solves the problems of common coagulation sedimentation processes that use baffled flocculation tanks, but these tanks have large volumes, significant head loss, easy breakage of flocs at turning points, and uneven distribution of effluent flow.

[0006] To achieve the above objectives, this utility model provides a high-efficiency sedimentation tank, comprising a sedimentation tank body, a reaction tank, a pre-sedimentation and thickening tank, and an inclined tube separation tank. The reaction tank includes a rectifier pipe, an inlet pipe, a cylinder, and a support plate. The rectifier pipe is fixedly connected to the sedimentation tank body and passes through the sedimentation tank body. The inlet pipe is fixedly connected to the rectifier pipe and is located outside the inlet pipe. The cylinder is fixedly connected to the sedimentation tank body and is located inside the sedimentation tank body. The support plate is fixedly connected to the cylinder and is located at the top of the cylinder. The pre-sedimentation and thickening tank and the inclined tube separation tank are respectively connected to the sedimentation tank body, and the support assembly is connected to the sedimentation tank body.

[0007] The reaction tank further includes a stirring motor, a stirring shaft, and blades. The stirring motor is fixedly connected to the support plate and located at the top of the support plate. The stirring shaft is connected to the stirring motor and located at the bottom of the stirring motor. There are multiple blades, each of which is fixedly connected to the stirring shaft and located on the outside of the stirring shaft.

[0008] The pre-sedimentation and thickening tank includes an inclined platform, a connecting plate, a sludge scraper motor, a sludge scraper shaft, a sludge scraper plate, and a fence. The inclined platform is fixedly connected to the sedimentation tank body and located inside the sedimentation tank body. The connecting plate is fixedly connected to the sedimentation tank body and located at the top of the sedimentation tank body. The sludge scraper motor is fixedly connected to the connecting plate and located at the top of the connecting plate. The sludge scraper shaft is connected to the sludge scraper motor and passes through the connecting plate. The sludge scraper plate is fixedly connected to the sludge scraper shaft and located at the top of the inclined platform. There are multiple fences, and each fence is fixedly connected to the sludge scraper plate and located at the top of the sludge scraper plate.

[0009] The pre-sedimentation thickening tank further includes a sludge discharge cylinder, a sludge discharge pipe, a sludge delivery pipe, and a sludge pump. The sludge discharge cylinder is fixedly connected to the inclined platform and located at the bottom of the inclined platform. The sludge discharge pipe is fixedly connected to the sludge discharge cylinder and located outside the sludge discharge cylinder. The sludge delivery pipe is fixedly connected to the sludge discharge cylinder and located between the sludge discharge cylinder and the rectifier pipe. The sludge pump is fixedly connected to the sludge delivery pipe and located between the sludge discharge cylinder and the rectifier pipe.

[0010] The inclined tube separation tank includes inclined tubes and baffles. There are two inclined tubes, which are fixedly connected to the sedimentation tank body and located inside the sedimentation tank body. There are two baffles, which are fixedly connected to the inclined tubes and located at the top of the inclined tubes.

[0011] This utility model discloses a high-efficiency sedimentation tank. The sedimentation tank body is used for sedimentation of sewage. The inlet pipe introduces sewage into the rectifier pipe, which can be filled with flocculant to achieve pre-coagulation of the raw water. The raw water is introduced into the center of the bottom plate of the reaction tank through the rectifier pipe. The stirring motor drives the stirring shaft and the blades to stir the raw water in the cylinder, so that the water flow in the cylinder is uniformly mixed and the necessary kinetic energy is provided for flocculation and distribution of polymeric electrolytes. The concentrated sludge from the pre-sedimentation and thickening tank is then transferred to the reaction tank. The external recirculation system ensures the sludge concentration in the tank. The cylinder and the sedimentation tank body form an upward-flowing slow-speed flocculation tank, which continuously increases the size of the floc particles to obtain a large amount of high-density, homogeneous flocs to meet the initial design requirements. The velocity in the sedimentation zone should be much faster than that in other systems to obtain high-density flocs. This solves the problems of common coagulation sedimentation processes with baffled flocculation tanks, which have large volumes, large head losses, easy floc breakage at turning points, and uneven effluent flow distribution. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency sedimentation tank according to the first embodiment of this utility model.

[0014] Figure 2 This is a schematic diagram of the reaction tank according to the first embodiment of this utility model.

[0015] Figure 3 This is a schematic diagram of the pre-sedimentation thickener of the first embodiment of this utility model.

[0016] Figure 4 This is a schematic diagram of the inclined tube separation cell according to the second embodiment of this utility model.

[0017] In the diagram: 101-Sedimentation tank body, 102-Rectifier pipe, 103-Inlet pipe, 104-Cylinder, 105-Support plate, 106-Agitator motor, 107-Agitator shaft, 108-Blade, 109-Inclined platform, 110-Connecting plate, 111-Sludge scraper motor, 112-Sludge scraper shaft, 113-Sludge scraper blade, 114-Enclosure, 115-Sludge discharge cylinder, 116-Sludge discharge pipe, 117-Sludge delivery pipe, 118-Sludge pump, 201-Inclined pipe, 202-Baffle. Detailed Implementation

[0018] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0019] The first embodiment of this application is as follows:

[0020] Please see Figures 1 to 3 ,in, Figure 1 This is a schematic diagram of the overall structure of a high-efficiency sedimentation tank according to the first embodiment of this utility model. Figure 2 This is a schematic diagram of the reaction tank according to the first embodiment of this utility model. Figure 3 This is a schematic diagram of the pre-sedimentation and thickening tank according to the first embodiment of this utility model. This utility model provides a high-efficiency sedimentation tank, including a sedimentation tank body 101, a reaction tank, and a pre-sedimentation and thickening tank. The reaction tank includes a rectifier pipe 102, an inlet pipe 103, a cylinder 104, a support plate 105, a stirring motor 106, a stirring shaft 107, and blades 108. The pre-sedimentation and thickening tank includes an inclined platform 109, a connecting plate 110, a sludge scraper motor 111, a sludge scraper shaft 112, a sludge scraper 113, a fence 114, a sludge discharge cylinder 115, a sludge discharge pipe 116, a sludge delivery pipe 117, and a sludge pump 118. The aforementioned solution solves the problems of common coagulation sedimentation processes using baffle flocculation tanks, which have large volumes, large head losses, easily broken flocs at turning points, and uneven effluent flow distribution. It can be understood that the aforementioned solution can be used in the scenario of sedimentation of sewage, and can also be used to solve the problem of sludge treatment on the inner wall of sedimentation tanks.

[0021] In this specific embodiment, the rectifier pipe 102 is fixedly connected to the sedimentation tank body 101 and passes through the sedimentation tank body 101. The inlet pipe 103 is fixedly connected to the rectifier pipe 102 and is located outside the inlet pipe 103. The cylinder 104 is fixedly connected to the sedimentation tank body 101 and is located inside the sedimentation tank body 101. The support plate 105 is fixedly connected to the cylinder 104 and is located at the top of the cylinder 104. The pre-sedimentation thickening tank and the inclined tube separation tank are respectively connected to the sedimentation tank body 101. The support assembly is connected to the sedimentation tank body 101. The sedimentation tank body 101 is used for sedimentation of sewage. The inlet pipe 103 introduces sewage into the rectifier pipe 102, and flocculant can be filled into the rectifier pipe 102. The raw water is pre-coagulated by introducing it into the center of the bottom plate of the reaction tank through the rectifier pipe 102. The stirring motor 106 drives the stirring shaft 107 and the blades 108 to stir the raw water in the cylinder 104, so that the water flow in the cylinder 104 is uniformly mixed and provides the necessary kinetic energy for flocculation and distribution of polymeric electrolytes. The sludge concentration in the tank is ensured by the external recirculation system of the concentrated sludge from the pre-sedimentation and thickening tank. The cylinder 104 and the sedimentation tank body 101 form an upward plug flow reaction slow flocculation tank, which continuously increases the size of the floc particles to obtain a large amount of high-density, homogeneous flocs to meet the initial design requirements. The speed of the sedimentation zone should be much faster than that of other systems to obtain high-density flocs.

[0022] The stirring motor 106 is fixedly connected to the support plate 105 and located at the top of the support plate 105. The stirring shaft 107 is connected to the stirring motor 106 and located at the bottom of the stirring motor 106. There are multiple blades 108, which are fixedly connected to the stirring shaft 107 and located on the outside of the stirring shaft 107. The stirring motor 106 provides power to the reaction tank. The rotation of the stirring motor 106 drives the stirring shaft 107 to rotate, and at the same time drives the blades 108 to rotate, so as to achieve the purpose of stirring and mixing the raw water inside the cylinder 104.

[0023] Secondly, the inclined platform 109 is fixedly connected to the sedimentation tank body 101 and located inside the sedimentation tank body 101. The connecting plate 110 is fixedly connected to the sedimentation tank body 101 and located at the top of the sedimentation tank body 101. The sludge scraper motor 111 is fixedly connected to the connecting plate 110 and located at the top of the connecting plate 110. The sludge scraper shaft 112 is connected to the sludge scraper motor 111 and passes through the connecting plate 110. The sludge scraper plate 113 is fixedly connected to the sludge scraper shaft 112 and located at the top of the inclined platform 109. Multiple fences 114 are provided, each fixedly connected to the sludge scraper plate 113 and located at the top of the sludge scraper plate 113. The inclined platform 109 is used to scrape the sludge. The guide allows the sludge to slide towards the bottom of the inclined platform 109, and the floc slowly enters the clarification zone from a large pre-sedimentation zone. This avoids damaging the floc or creating eddies, ensuring that a large number of suspended solid particles are evenly deposited in this zone. The floc collects into sludge and is concentrated in the lower part of the pre-sedimentation and thickening tank. The sludge stays in this layer for several hours and is then discharged into the sludge discharge cylinder 115. When removing sludge from the inner wall of the sedimentation tank body 101, the rotation of the scraper motor 111 drives the scraper shaft 112 and the scraper blade 113 to rotate. The fence 114 and the scraper blade 113 scrape off the sludge from the top of the inclined platform 109 and the inner wall surface of the sedimentation tank body 101, facilitating the treatment of the sludge on the inner wall of the sedimentation tank body 101.

[0024] Furthermore, the sludge discharge cylinder 115 is fixedly connected to the inclined platform 109 and located at the bottom of the inclined platform 109. The sludge discharge pipe 116 is fixedly connected to the sludge discharge cylinder 115 and located outside the sludge discharge cylinder 115. The sludge delivery pipe 117 is fixedly connected to the sludge discharge cylinder 115 and located between the sludge discharge cylinder 115 and the rectifier pipe 102. The sludge pump 118 is fixedly connected to the sludge delivery pipe 117 and located between the sludge discharge cylinder 115 and the rectifier pipe 102. The sludge discharge cylinder 115 is used to store sludge. The sludge in the sludge discharge cylinder 115 is discharged from the sedimentation tank body 101 through the sludge discharge pipe 116. The sludge pump 118 pumps part of the sludge in the sludge discharge cylinder 115 into the rectifier pipe 102 through the sludge delivery pipe 117, so that the sludge concentration in the reaction tank is maintained.

[0025] Using a high-efficiency sedimentation tank of this embodiment, the sedimentation tank body 101 is used for sedimentation of sewage. The inlet pipe 103 introduces sewage into the rectifier pipe 102, which can be filled with flocculant to achieve pre-coagulation of the raw water. The raw water is introduced into the center of the bottom plate of the reaction tank through the rectifier pipe 102. The stirring motor 106 drives the stirring shaft 107 and the blades 108 to stir the raw water in the cylinder 104, so that the water flow in the cylinder 104 is uniformly mixed and the necessary kinetic energy is provided for flocculation and distribution of polymeric electrolytes. The external recirculation system of the concentrated sludge from the pre-sedimentation thickening tank ensures the sludge concentration in the tank. The cylindrical tank 104 and the sedimentation tank body 101 form an upward-flowing slow-speed flocculation tank, which continuously increases the size of the floc particles to obtain a large amount of high-density, homogeneous flocs to meet the initial design requirements. The velocity in the sedimentation zone should be much faster than that in other systems to obtain high-density flocs. This solves the problems of common coagulation sedimentation processes with baffle flocculation tanks, which have large volumes, large head losses, easy floc breakage at turning points, and uneven effluent flow distribution.

[0026] The second embodiment of this application is as follows:

[0027] Based on the first embodiment, please refer to Figure 4 ,in, Figure 4 This is a schematic diagram of the inclined tube separation cell according to the second embodiment of this utility model.

[0028] The high-efficiency sedimentation tank described in this embodiment also includes an inclined tube separation tank, which includes an inclined tube 201 and a baffle 202.

[0029] In this specific embodiment, there are two inclined tubes 201, each fixedly connected to the sedimentation tank body 101 and located inside the sedimentation tank body 101. There are also two baffles 202, each fixedly connected to the inclined tubes 201 and located at the top of the inclined tubes 201. The inclined tubes 201 and the sedimentation tank body 101 form a counter-current inclined tube sedimentation zone. This counter-current sedimentation zone settles the remaining flocs. The baffles 202 effectively divide the inclined tubes 201 into several independent groups to improve the uniform distribution of water flow. No preferential channels are needed, allowing the reaction and sedimentation to complete under optimal conditions.

[0030] Using a high-efficiency sedimentation tank of this embodiment, the inclined tube 201 and the sedimentation tank body 101 form a counter-current inclined tube sedimentation zone. The remaining floc is settled through the formed counter-current inclined tube sedimentation zone. The baffle 202 effectively divides the inclined tube 201 into several independent groups to improve the uniform distribution of water flow. No priority channel is required, allowing the reaction and sedimentation to be completed under optimal conditions.

[0031] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A high-efficiency sedimentation tank, comprising a sedimentation tank body, characterized in that, It also includes a reaction tank, a pre-sedimentation and thickening tank, and an inclined tube separation tank; The reaction tank includes a rectifier pipe, an inlet pipe, a cylinder, and a support plate. The rectifier pipe is fixedly connected to the sedimentation tank body and passes through the sedimentation tank body. The inlet pipe is fixedly connected to the rectifier pipe and is located outside the inlet pipe. The cylinder is fixedly connected to the sedimentation tank body and is located inside the sedimentation tank body. The support plate is fixedly connected to the cylinder and is located at the top of the cylinder. The pre-sedimentation thickening tank and the inclined tube separation tank are respectively connected to the sedimentation tank body. The support assembly is connected to the sedimentation tank body.

2. The high-efficiency sedimentation tank as described in claim 1, characterized in that, The reaction tank also includes a stirring motor, a stirring shaft, and blades. The stirring motor is fixedly connected to the support plate and located at the top of the support plate. The stirring shaft is connected to the stirring motor and located at the bottom of the stirring motor. There are multiple blades, each of which is fixedly connected to the stirring shaft and located on the outside of the stirring shaft.

3. The high-efficiency sedimentation tank as described in claim 1, characterized in that, The pre-sedimentation and thickening tank includes an inclined platform, a connecting plate, a sludge scraper motor, a sludge scraper shaft, a sludge scraper plate, and a fence. The inclined platform is fixedly connected to the sedimentation tank body and located inside the sedimentation tank body. The connecting plate is fixedly connected to the sedimentation tank body and located at the top of the sedimentation tank body. The sludge scraper motor is fixedly connected to the connecting plate and located at the top of the connecting plate. The sludge scraper shaft is connected to the sludge scraper motor and passes through the connecting plate. The sludge scraper plate is fixedly connected to the sludge scraper shaft and located at the top of the inclined platform. There are multiple fences, and each fence is fixedly connected to the sludge scraper plate and located at the top of the sludge scraper plate.

4. The high-efficiency sedimentation tank as described in claim 3, characterized in that, The pre-sedimentation thickening tank also includes a sludge discharge cylinder, a sludge discharge pipe, a sludge delivery pipe, and a sludge pump. The sludge discharge cylinder is fixedly connected to the inclined platform and located at the bottom of the inclined platform. The sludge discharge pipe is fixedly connected to the sludge discharge cylinder and located outside the sludge discharge cylinder. The sludge delivery pipe is fixedly connected to the sludge discharge cylinder and located between the sludge discharge cylinder and the rectifier pipe. The sludge pump is fixedly connected to the sludge delivery pipe and located between the sludge discharge cylinder and the rectifier pipe.

5. The high-efficiency sedimentation tank as described in claim 1, characterized in that, The inclined tube separation tank includes inclined tubes and baffles. There are two inclined tubes, which are fixedly connected to the sedimentation tank body and located inside the sedimentation tank body. There are two baffles, which are fixedly connected to the inclined tubes and located at the top of the inclined tubes.

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