Carbon-loaded air flotation integrated equipment

Abstract

The utility model relates to the technical field of water treatment, and discloses carbon-loaded air flotation integrated equipment, which comprises a mixing area, a flocculation area, a coagulation assisting area, a contact area, a separation area and an auxiliary area, is integrally rectangular and is divided into two parts in the width direction, one part is divided into a mixing area, a flocculation area, a coagulation assisting area, a contact area and a separation area which are symmetrically designed from front to back, the other part is an auxiliary area, and a dosing and gas dissolving group is arranged in the auxiliary area and is connected with the mixing area, the flocculation area, the coagulation assisting area, the contact area and the separation area respectively for dosing and gas dissolving. Aiming at the problems of high effluent COD (Chemical Oxygen Demand), obvious chromaticity and the like of a built sewage plant, under the condition of saving cost, the effluent quality of the sewage plant can meet the requirements of quasi-surface four-class water, and the equipment adopts an integrated design, is small in occupied area, quick to use and convenient to operate, and is suitable for the sewage plant and the sewage plant. The method also has outstanding application advantages in occasions such as emergency treatment of waterworks and black and odorous river channels.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a carbon-carrying air flotation integrated device. Background Art

[0002] With the acceleration of urbanization and the improvement of environmental awareness, more stringent requirements have been put forward for the effluent quality of sewage treatment plants. In particular, the deep removal of SS (suspended solids) and TP (total phosphorus) has become the key point of upgrading and transformation.

[0003] At present, in the upgrading and transformation of domestic municipal sewage treatment, high-efficiency sedimentation tanks are used as a common treatment unit, showing good performance in the removal of SS and TP. However, in actual operation, high-efficiency sedimentation tanks have high operating requirements and are prone to excessive SS in effluent. The limitation of the design rising flow rate limits its application in existing sewage treatment plants with limited land and funds. Therefore, seeking a more efficient, stable and economical treatment technology is of great significance for the upgrading and transformation of existing sewage treatment plants.

[0004] In recent years, high-speed dissolved air flotation technology has gradually been widely used in water treatment fields such as municipal water supply and drainage and industrial wastewater due to its outstanding advantages such as strong processing capacity, stable system operation, and comprehensive cost economy. High-speed dissolved air flotation can deeply remove SS and TP from the effluent of sewage treatment plants to meet increasingly stringent emission standards.

[0005] In view of the limitations of land occupation and funds faced by existing sewage treatment plants during the upgrading process, the use of high-speed dissolved air flotation integrated equipment has become a feasible solution. Therefore, the municipal sewage treatment upgrading technology combining high-speed dissolved air flotation integrated equipment and powdered activated carbon has broad application prospects and market demand. For this reason, we have proposed a carbon-loaded flotation integrated equipment. Utility Model Content

[0006] ( 一 ) Technical issues solved

[0007] In view of the deficiencies in the prior art, the utility model provides a carbon-carrying air flotation integrated device to solve the above-mentioned problems.

[0008] (II) Technical solution

[0009] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a carbon-carrying air flotation integrated equipment, the equipment is designed in a rectangular shape as a whole, and is divided into an upper area and a lower area, the upper area of ​​the equipment includes a mixing area, a flocculation area, a coagulant area, a contact area and a separation area which are connected in sequence, and the mixing area is arranged above the flocculation area, and the coagulant area, the contact area and the separation area are arranged in a transverse order on one side of the mixing area and the flocculation area;

[0010] The lower area of ​​the equipment is an auxiliary area, and a dosing and gas dissolving group is arranged in the auxiliary area and is respectively connected with the mixing area, the flocculation area, the coagulation-aiding area, the contact area and the separation area for dosing and gas dissolving.

[0011] Preferably, a steel platform is provided on one side of the mixing zone, flocculation zone, coagulation-aiding zone, contact zone and separation zone close to the auxiliary zone, and an emptying pipe is fixedly provided in each of the mixing zone, flocculation zone, coagulation-aiding zone, contact zone and separation zone and is merged into the emptying main pipe;

[0012] The mixing zone, flocculation zone, coagulant-aiding zone, contact zone and separation zone all adopt a design of top-in and bottom-out or bottom-in and top-out for the water flow in and out.

[0013] Preferably, the mixing zone is provided with a stirring paddle and the hydraulic retention time is 3-5 min, and one side of the mixing zone near the top and the bottom are respectively fixedly connected with a water inlet pipe and a powdered activated carbon dosing pipe.

[0014] Preferably, the water inlet of the flocculation zone is connected to the water outlet of the mixing zone, a variable frequency stirring paddle is arranged in the flocculation zone and the hydraulic retention time is 3-5 minutes, and a flocculant dosing pipe is fixedly connected to the bottom end of the flocculation zone.

[0015] Preferably, the water inlet of the coagulation-aiding zone is connected to the water outlet of the flocculation zone, the coagulation-aiding zone is provided with two variable frequency stirring paddles and the hydraulic retention time is 5-10 minutes, and the bottom end of the coagulation-aiding zone is fixedly connected to a coagulant dosing pipe.

[0016] Preferably, the water inlet end of the contact zone is connected to the water outlet end of the coagulation aid zone, a dissolved air releaser is arranged in the contact zone, the rising flow rate of the water body in the contact zone is 30-90m / h, the hydraulic retention time is 1-2min, and a partition is arranged in the contact zone with a vertical angle of 45°-70°.

[0017] Preferably, the water inlet end of the separation zone is connected with the water outlet end of the contact zone, a scraper is arranged in the separation zone and a slag collecting trough and a water outlet trough are provided, the slag collecting trough is fixedly connected with a slag outlet pipe, the water outlet trough is fixedly connected with a water outlet pipe and a dissolved air water return pipe, the separation zone is rectangular and the length-to-width ratio is controlled at 3:2-3:1, the rising flow rate of water in the separation zone is 20-30m / h, and the hydraulic retention time is 3-10min.

[0018] Preferably, the mixing zone, flocculation zone and coagulant-aiding zone are all cylindrical or chamfered square.

[0019] Preferably, the dosing and air dissolving group includes a powdered activated carbon dosing device, a flocculant dosing device, a coagulant dosing device and a dissolving device which are equipped in the auxiliary area, wherein the powdered activated carbon dosing device, the flocculant dosing device and the coagulant dosing device all include a dispensing barrel, a dosing pump group and an electric control cabinet, the dosing pump flow is adjustable, the powdered activated carbon dosing device is connected to the mixing area through a powdered activated carbon dosing pipe, the flocculant dosing device is connected to the flocculation area through a flocculant dosing pipe, the coagulant dosing device is connected to the coagulation aid area through a coagulant dosing pipe, the air dissolving device includes a pressure air dissolving tank, an air dissolving water pump and an air compressor, wherein the air compressor is connected between the pressure air dissolving tank and the air dissolving water pump, the pressure air dissolving tank is fixedly connected to the dissolved air releaser in the contact area, and the dissolved air water pump is fixedly connected to the dissolved air water reflux pipe in the separation area.

[0020] The powdered activated carbon dosing device is connected to the mixing zone through the powdered activated carbon dosing pipe. When the COD and chroma of the system influent are high or there are more adsorbable pollutants, activated carbon slurry is added to the mixing zone through the powdered activated carbon dosing device, otherwise it can be used. The system influent directly enters the flocculation zone for treatment through the mixing zone, which is very flexible. The flocculant dosing device is connected to the flocculation zone through the flocculant dosing pipe, and flocculants are added to the flocculation zone. The coagulant aid dosing device is connected to the coagulant aid zone through the coagulant aid dosing pipe, and coagulants are added to the coagulant aid zone to further enhance the flocculation effect. The dissolved air device includes a pressure dissolved air tank, a dissolved air water pump and an air source device. The air source device can be an air compressor or an ejector. The dissolved air water pump is connected to the dissolved air water reflux pipe of the separation zone, and a part of the dissolved air water is refluxed and pumped to the pressure dissolved air tank. The reflux dissolved air water is fully mixed and balanced with the compressed air generated by the air source device; the high-pressure dissolved air water stored in the pressure dissolved air tank enters the contact zone through the dissolved air releaser, and the pressure is released to release a large number of tiny bubbles, which are fully bonded to and floated with the tiny flocs in the system inlet water. The formed scum is regularly scraped off by the scum scraper in the separation zone and enters the slag collecting tank, and is finally discharged from the equipment through the slag discharge pipe.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the utility model provides a carbon-carrying air flotation integrated device, which has the following beneficial effects:

[0023] 1. The integrated carbon-carrying flotation equipment adopts high-speed dissolved air flotation technology and has carbon-carrying function. On the basis of fully ensuring that the SS and TP of the effluent meet the standards, it can save costs by targeting the problems of high COD and obvious chromaticity of the effluent from the existing sewage treatment plants. The equipment adopts an integrated design, which saves space, is quick to put into use, easy to operate, and runs economically and stably. It is not only suitable for sewage treatment plants, but also has outstanding application advantages in water plants, emergency treatment of black and smelly rivers, and other occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model.

[0025] In the figure: 1. Mixing zone; 1.1. Stirring paddle; 1.2. Water inlet pipe; 1.3. Powdered activated carbon dosing pipe; 2. Flocculation zone; 2.1. Frequency conversion stirring paddle 1; 2.2. Flocculant dosing pipe; 3. Aid coagulant zone; 3.1. Frequency conversion stirring paddle 2; 3.2. Aid coagulant dosing pipe; 4. Contact zone; 4.1. Dissolved air releaser; 5. Separation zone; 5.1. Slag scraper; 5.2. Slag collecting tank; 5.3. Water outlet tank; 5.4. Slag discharge pipe; 5.5. Water outlet pipe; 5.6. Dissolved air water return pipe; 6. Ancillary zone; 6.1. Powdered activated carbon dosing device; 6.2. Flocculant dosing device; 6.3. Aid coagulant dosing device; 6.4. Dissolved air device; 6.4.1. Pressure dissolved air tank; 6.4.2. Dissolved air water pump; 6.4.3. Air compressor. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1 , a carbon-carrying air flotation integrated equipment, the equipment is designed in a rectangular shape as a whole, and is divided into an upper area and a lower area, the upper area of ​​the equipment includes a mixing area 1, a flocculation area 2, a coagulant area 3, a contact area 4 and a separation area 5 which are connected in sequence, the mixing area 1, the flocculation area 2, the coagulant area 3, the contact area 4 and the separation area 5 are symmetrically designed from front to back in the width direction, the mixing area 1 is arranged above the flocculation area 2, the coagulant area 3, the contact area 4 and the separation area 5 are arranged in sequence in a transverse direction on one side of the mixing area 1 and the flocculation area 2;

[0028] The lower area of ​​the equipment is the auxiliary area 6, and the auxiliary area 6 is provided with a dosing and gas dissolving group respectively connected with the mixing area 1, the flocculation area 2, the coagulant aid area 3, the contact area 4 and the separation area 5 for dosing and gas dissolving.

[0029] A steel platform is arranged on one side of the mixing zone 1, the flocculation zone 2, the coagulant zone 3, the contact zone 4 and the separation zone 5 close to the auxiliary zone 6. Drain pipes are fixedly arranged in the mixing zone 1, the flocculation zone 2, the coagulant zone 3, the contact zone 4 and the separation zone 5 and are all merged into the main drain pipe. The water inlet and outlet of the mixing zone 1, the flocculation zone 2, the coagulant zone 3, the contact zone 4 and the separation zone 5 are designed to be in from the top and out from the bottom or in from the bottom and out from the top to prevent short-circuiting of water in each zone.

[0030] The mixing zone 1 is provided with a stirring paddle 1.1 and the hydraulic retention time is 3-5 minutes. A water inlet pipe 1.2 and a powdered activated carbon dosing pipe 1.3 are fixedly connected to one side of the mixing zone 1 near the top and the bottom, respectively.

[0031] The water inlet of the flocculation zone 2 is connected to the water outlet of the mixing zone 1. The flocculation zone 2 is provided with a variable frequency stirring paddle 2.1 and a hydraulic retention time of 3-5 minutes. The bottom of the flocculation zone 2 is fixedly connected with a flocculant dosing pipe 2.2.

[0032] The water inlet of the coagulation zone 3 is connected with the water outlet of the flocculation zone 2. The coagulation zone 3 is provided with a variable frequency stirring paddle 3.1 and the hydraulic retention time is 5-10 minutes. The bottom of the coagulation zone 3 is fixedly connected with a coagulant dosing pipe 3.2.

[0033] The water inlet of the contact zone 4 is connected to the water outlet of the coagulation aid zone 3. A dissolved air releaser 4.1 is arranged in the contact zone 4. The rising velocity of the water in the contact zone 4 is 30-90 m / h, the hydraulic retention time is 1-2 min, and a partition is arranged in the contact zone 4 with a vertical angle of 45°-70°.

[0034] The water inlet end of the separation zone 5 is connected with the water outlet end of the contact zone 4. The separation zone 5 is provided with a scraper 5.1 and is provided with a slag collecting trough 5.2 and a water outlet trough 5.3. The slag collecting trough 5.2 is fixedly connected with a slag outlet pipe 5.4, and the water outlet trough 5.3 is fixedly connected with a water outlet pipe 5.5 and a dissolved air water return pipe 5.6. The separation zone 5 is rectangular and the length-width ratio is controlled at 3:2-3:1. The rising velocity of the water body in the separation zone 5 is 20-30m / h and the hydraulic retention time is 3-10min.

[0035] The mixing zone 1, the flocculation zone 2 and the coagulation-aiding zone 3 are all cylindrical or chamfered square.

[0036] The dosing and dissolving gas group includes a powdered activated carbon dosing device 6.1, a flocculant dosing device 6.2, a coagulant dosing device 6.3 and a dissolving gas device 6.4, which are arranged in the auxiliary area 6. The powdered activated carbon dosing device 6.1, the flocculant dosing device 6.2 and the coagulant dosing device 6.3 all include a dispensing barrel, a dosing pump group and an electric control cabinet. The dosing pump flow rate is adjustable. The powdered activated carbon dosing device 6.1 is connected to the mixing area 1 through the powdered activated carbon dosing pipe 1.3, the flocculant dosing device 6.2 is connected to the flocculation area 2 through the flocculant dosing pipe 2.2, and the coagulant dosing device 6. The coagulant aid dosing pipe 3.2 is connected to the coagulant aid zone 3. The air dissolving device 6.40 includes a pressure air dissolving tank 6.4.1, an air dissolving water pump 6.4.2 and an air source device. The air source device can be an air compressor 6.4.3 or an ejector. The carbon-carrying air flotation integrated equipment adopts an air compressor 6.4.3, wherein the air compressor 6.4.3 is connected between the pressure air dissolving tank 6.4.1 and the air dissolving water pump 6.4.2. The pressure air dissolving tank 6.4.1 is fixedly connected to the air dissolving releaser 4.1 in the contact zone 4. The air dissolving water pump 6.4.2 is fixedly connected to the air dissolving water reflux pipe 5.6 in the separation zone 5.

[0037] Working principle: When treating sewage, first inject sewage into the mixing zone 1 through the water inlet pipe 1.2. Since the powdered activated carbon dosing device 6.1 is connected to the mixing zone 1 through the powdered activated carbon dosing pipe 1.3, when the system influent COD and chromaticity are high or there are more adsorbable pollutants, activated carbon slurry can be added to the mixing zone 1 through the powdered activated carbon dosing device 6.1. Otherwise, it can be omitted. The system influent directly enters the flocculation zone 2 for treatment through the mixing zone 1, which is very flexible. Flocculant dosing device 6.2 is connected to the flocculation zone 2 through the flocculant dosing pipe 2.2, and flocculants are added to the flocculation zone 2. The coagulant dosing device 6.3 is connected to the coagulation aid zone 3 through the coagulant dosing pipe 3.2, and coagulants are added to the coagulation aid zone 3 to further enhance the flocculation effect; the dissolved air water return pipe 5.6 of the separation zone 5 is connected through the dissolved air pump 6.4.2, and a part of the dissolved air water is returned to the pressure dissolved air tank 6.4.1, and the reflux dissolved air water is fully mixed and balanced with the compressed air generated by the air compressor 6.4.3. The high-pressure dissolved air water stored in the pressure dissolved air tank 6.4.1 enters the contact zone 4 through the dissolved air releaser 4.1, and a large number of tiny bubbles are released by pressure relief, which are fully bonded with the tiny flocs in the system inlet water and float up. The formed scum is regularly scraped by the scraper 5.1 of the separation zone 5 and enters the slag collecting tank 5.2, and finally discharged from the equipment through the slag discharge pipe 5.4.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A carbon-carrying air flotation integrated device, characterized in that: The device is designed in a rectangular shape as a whole and is divided into an upper zone and a lower zone. The upper zone of the device includes a mixing zone (1), a flocculation zone (2), a coagulant zone (3), a contact zone (4) and a separation zone (5) which are connected in sequence. The mixing zone (1) is arranged above the flocculation zone (2), and the coagulant zone (3), the contact zone (4) and the separation zone (5) are arranged in a transverse order on one side of the mixing zone (1) and the flocculation zone (2). The lower area of ​​the equipment is an auxiliary area (6), and a drug-adding and gas-dissolving group is arranged in the auxiliary area (6) and is respectively connected to the mixing area (1), the flocculation area (2), the coagulation-aiding area (3), the contact area (4) and the separation area (5) for drug-adding and gas-dissolving.

2. The integrated carbon-carrying air flotation device according to claim 1, characterized in that: A steel platform is provided on one side of the mixing zone (1), the flocculation zone (2), the coagulation-aiding zone (3), the contact zone (4) and the separation zone (5) close to the auxiliary zone (6); and drain pipes are fixedly provided in the mixing zone (1), the flocculation zone (2), the coagulation-aiding zone (3), the contact zone (4) and the separation zone (5) and are all merged into the drain main pipe; The mixing zone (1), flocculation zone (2), coagulant-aiding zone (3), contact zone (4) and separation zone (5) all adopt a design of top-in and bottom-out or bottom-in and top-out for the water flow in and out.

3. The integrated carbon-carrying air flotation device according to claim 2, characterized in that: The mixing zone (1) is provided with a stirring paddle (1.1) and a hydraulic retention time of 3-5 minutes. A water inlet pipe (1.2) and a powdered activated carbon dosing pipe (1.3) are respectively fixedly connected at the top and bottom ends of one side of the mixing zone (1).

4. The integrated carbon-carrying air flotation device according to claim 3, characterized in that: The water inlet of the flocculation zone (2) is connected to the water outlet of the mixing zone (1), the flocculation zone (2) is provided with a variable frequency stirring paddle (2.1) and a hydraulic retention time of 3-5 minutes, and the bottom end of the flocculation zone (2) is fixedly connected to a flocculant dosing pipe (2.2).

5. The integrated carbon-carrying air flotation device according to claim 4, characterized in that: The water inlet end of the coagulation aid zone (3) is connected to the water outlet end of the flocculation zone (2), the coagulation aid zone (3) is equipped with a variable frequency stirring paddle 2 (3.1) and the hydraulic retention time is 5-10 minutes, and the bottom end of the coagulation aid zone (3) is fixedly connected to a coagulant dosing pipe (3.2).

6. The integrated carbon-carrying air flotation device according to claim 5, characterized in that: The water inlet end of the contact zone (4) is connected to the water outlet end of the coagulation aid zone (3), a dissolved air releaser (4.1) is arranged in the contact zone (4), the rising velocity of the water body in the contact zone (4) is 30-90 m / h, the hydraulic retention time is 1-2 min, and a partition is arranged in the contact zone (4) and the vertical angle is 45°-70°.

7. The integrated carbon-carrying air flotation device according to claim 6, characterized in that: The water inlet end of the separation zone (5) is connected to the water outlet end of the contact zone (4); the separation zone (5) is provided with a scraper (5.1) and is provided with a slag collecting trough (5.2) and a water outlet trough (5.3); the slag collecting trough (5.2) is fixedly connected to a slag outlet pipe (5.4); the water outlet trough (5.3) is fixedly connected to a water outlet pipe (5.5) and a dissolved air water return pipe (5.6); the separation zone (5) is rectangular and has a length-to-width ratio controlled at 3:2-3:1; the rising velocity of water in the separation zone (5) is 20-30 m / h and the hydraulic retention time is 3-10 min.

8. The integrated carbon-carrying air flotation equipment according to claim 1, characterized in that: The mixing zone (1), flocculation zone (2) and coagulant-aiding zone (3) are all cylindrical or chamfered square.

9. The integrated carbon-carrying air flotation device according to claim 7, characterized in that: The dosing and air dissolving group comprises a powdered activated carbon dosing device (6.1), a flocculant dosing device (6.2), a coagulant dosing device (6.3) and an air dissolving device (6.4) arranged in the auxiliary area (6), wherein the powdered activated carbon dosing device (6.1), the flocculant dosing device (6.2) and the coagulant dosing device (6.3) all comprise a dosing barrel, a dosing pump group and an electric control cabinet, and the dosing pump flow rate is adjustable. The powdered activated carbon dosing device (6.1) is connected to the mixing area (1) via a powdered activated carbon dosing pipe (1.3), and the flocculant dosing device (6.2) is connected to the mixing area (1) via a flocculant dosing pipe (2.2 ) is connected to the flocculation zone (2), the coagulant dosing device (6.3) is connected to the coagulation zone (3) through the coagulant dosing pipe (3.2), the air dissolving device (6.40) includes a pressure air dissolving tank (6.4.1), an air dissolving water pump (6.4.2) and an air compressor (6.4.3), wherein the air compressor (6.4.3) is connected between the pressure air dissolving tank (6.4.1) and the air dissolving water pump (6.4.2), the pressure air dissolving tank (6.4.1) is fixedly connected to the air dissolving releaser (4.1) in the contact zone (4), and the air dissolving water pump (6.4.2) is fixedly connected to the air dissolving water reflux pipe (5.6) in the separation zone (5).

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