Clarification tank for sewage treatment

Abstract

The utility model belongs to the technical field of sewage treatment, and discloses a clarification tank for sewage treatment, which comprises a reaction device for stirring and mixing sewage and a flocculating agent to perform flocculation reaction, and a separation device for performing solid-liquid separation and discharging clear water is arranged at the top of the reaction device. The gas stirring device is arranged at the bottom of the reaction device and is used for introducing gas from the bottom to stir the flocculating constituent; the gas stirring device comprises a containing box. According to the clarification tank for sewage treatment disclosed by the utility model, gas is introduced into the bottom of the clarification tank, so that gas stirring is carried out while mechanical stirring is carried out, the mixing effect is improved, and the flocculation reaction is accelerated; gas is introduced from the bottom, so that floccules precipitated at the bottom are stirred up, the floccules participating in the reaction are increased, and the flocculation reaction is further accelerated; gas is introduced from the bottom, so that flocculates precipitated at the bottom are stirred up, and the utilization rate of the flocculating agent is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, in particular to a clarification tank for sewage treatment. Background Art

[0002] Sewage treatment is the process of purifying sewage so that it meets the water quality requirements for discharge into a certain water body or reuse. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical care, and catering, and is increasingly entering the daily lives of ordinary people. Clarifiers are needed for sewage treatment. Clarifiers are equipment for coagulating water and removing suspended matter and colloids in water. The medium in the clarifier that serves to intercept and separate impurity particles is suspended sludge. The coagulation treatment process of water and wastewater includes three stages: mixing of water and chemicals, reaction, and separation of flocculants and water. Clarifiers are specialized equipment that completes the above three processes in one.

[0003] In contrast, a Chinese patent with authorization announcement number CN219314669U discloses a sewage treatment clarification tank, including a reaction chamber and a separation chamber; the reaction chamber has a first reaction chamber and a second reaction chamber from bottom to top, the first reaction chamber has a sewage outlet at the lower part, and the reaction chamber is provided with an ultrafine iron powder feeding channel; the separation chamber, the lower and upper parts of the chamber are respectively connected to the first reaction chamber and the second reaction chamber; wherein a controllable magnetic part is provided in the separation chamber, and the controllable magnetic part includes at least two states: magnetic and non-magnetic.

[0004] The above patent adopts mechanical stirring to mix flocculant and sewage, which has a single mixing method, poor mixing effect and slows down the flocculation reaction. Therefore, a new device needs to be designed. Utility Model Content

[0005] The purpose of the utility model is to provide a clarifier for sewage treatment to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A clarification tank for sewage treatment, comprising a reaction device for stirring and mixing sewage and a flocculant for flocculation reaction, a separation device for solid-liquid separation and discharge of clean water is arranged on the top of the reaction device, and a gas stirring device for introducing gas from the bottom to stir the floccules is arranged at the bottom of the reaction device;

[0008] The gas stirring device comprises a placement box, a filter plate is arranged on the top of the placement box, a vortex tube is installed in the placement box, a blowing hole is arranged on the vortex tube, an air intake pipe is arranged under the vortex tube, and an air pump is arranged on the air intake pipe.

[0009] Further: the reaction device includes an outer cylinder, a sewage pipe is provided at the bottom of the outer cylinder, an umbrella-shaped plate is provided inside the outer cylinder, a reaction chamber is formed between the bottom of the umbrella-shaped plate and the bottom of the outer cylinder, a mixer is provided on the top of the reaction chamber, a water inlet pipe is provided on one side of the outer cylinder, the water inlet pipe extends into the reaction chamber, a guide plate is provided on one side of the reaction chamber below the water inlet pipe, a first cylinder is provided inside the guide plate, and a second cylinder is provided outside the first cylinder.

[0010] Furthermore: the separation device includes a separation chamber, a water collecting trough is arranged on the top of the separation chamber, the water collecting trough is annular in shape, a plurality of drainage grooves are evenly arranged on the inner side of the water collecting trough, and a drainage pipe is arranged on one side of the outer side of the water collecting trough.

[0011] Furthermore: the filter plate is made of 304 stainless steel.

[0012] Furthermore: the bottom of the outer cylinder is in a truncated cone shape.

[0013] Furthermore: eight drainage grooves are provided.

[0014] Compared with the prior art, the beneficial effects are:

[0015] By introducing gas from the bottom, gas agitation is performed while mechanical stirring is performed, which improves the mixing effect and accelerates the flocculation reaction.

[0016] By introducing gas from the bottom, the floccules precipitated at the bottom are stirred up, increasing the floccules participating in the reaction and further accelerating the flocculation reaction;

[0017] By introducing gas from the bottom, the flocculants precipitated at the bottom are stirred up, thereby improving the utilization rate of the flocculant. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a clarification tank for sewage treatment described in the utility model;

[0019] Figure 2 It is a front cross-sectional view of a clarification tank for sewage treatment described in the utility model;

[0020] Figure 3 It is an axonometric diagram of a gas stirring device of a clarification tank for sewage treatment described in the utility model.

[0021] In the accompanying drawings: 101, outer cylinder; 102, umbrella-shaped plate; 103, water inlet pipe; 104, guide plate; 105, first cylinder; 106, second cylinder; 107, mixer; 108, reaction chamber; 109, sewage pipe; 201, separation chamber; 202, drainage trough; 203, water collecting trough; 204, drainage pipe; 301, placement box; 302, filter plate; 303, vortex tube; 304, blowing hole; 305, air inlet pipe; 306, air pump. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1-Figure 3 A clarification tank for sewage treatment includes a reaction device for stirring and mixing sewage and a flocculant for flocculation reaction, a separation device for solid-liquid separation and discharge of clean water is arranged on the top of the reaction device, and a gas stirring device for introducing gas from the bottom to stir the floccules is arranged at the bottom of the reaction device.

[0024] In this embodiment, the reaction device includes an outer cylinder 101, a sewage pipe 109 is arranged at the bottom of the outer cylinder 101, an umbrella plate 102 is arranged inside the outer cylinder 101, and a reaction chamber 108 is formed between the bottom of the umbrella plate 102 and the bottom of the outer cylinder 101. A mixer 107 is arranged on the top of the reaction chamber 108. A water inlet pipe 103 is arranged on one side of the outer cylinder 101, and the water inlet pipe 103 extends into the reaction chamber 108. A guide plate 104 is arranged on one side of the reaction chamber 108 below the water inlet pipe 103, and a first cylinder 105 is arranged inside the guide plate 104. A second cylinder 106 is arranged outside the first cylinder 105. The bottom of the outer cylinder 101 is a truncated cone. Sewage is introduced from the water inlet pipe 103 and is blocked by the guide plate 104. It flows into the reaction chamber 108 under the umbrella plate 102 in a circular shape and evenly. At this time, under the action of the lifting mixer 107, the sewage is fully in contact with the flocculant in the reaction chamber 108, and the fine impurities in the sewage produce floccules under the action of the flocculant. At the same time, the lifting mixer 107 lifts the produced floccules and sewage into the first cylinder 105, and flows into the separation device through the gap between the first cylinder 105 and the second cylinder 106 for solid-liquid separation. After the solid-liquid separation, the floccules settle downward and flow back to the reaction chamber 108 through the gap between the outer cylinder 101 and the umbrella plate 102 to continue to participate in the flocculation reaction. When sewage needs to be discharged, it is discharged through the sewage discharge pipe 109 at the bottom of the outer cylinder 101;

[0025] In this embodiment: the separation device includes a separation chamber 201, a water collecting tank 203 is arranged on the top of the separation chamber 201, the water collecting tank 203 is annular in shape, a plurality of drainage tanks 202 are evenly arranged on the inner side of the water collecting tank 203, a drainage pipe 204 is arranged on the outer side of the water collecting tank 203, and eight drainage tanks 202 are arranged. The flocculent entering the separation chamber 201 is precipitated and separated from the sewage, and the separated clean water flows into the water collecting tank 203 through the drainage tank 202 and is discharged through the drainage pipe 204;

[0026] In this embodiment: the gas stirring device includes a placement box 301, a filter plate 302 is arranged on the top of the placement box 301, a vortex tube 303 is installed in the placement box 301, a blowing hole 304 is arranged on the vortex tube 303, an air inlet pipe 305 is arranged below the vortex tube 303, and an air pump 306 is arranged on the air inlet pipe 305. The filter plate 302 is made of 304 stainless steel. When the sewage enters the reaction chamber 108 for flocculation reaction, the air pump 306 works to pass gas into the vortex tube 303 in the placement box 301 through the air inlet pipe 305, so that the gas is blown into the bottom of the reaction chamber 108 through the blowing hole 304, stirring the water flow in the reaction chamber 108, enhancing the stirring effect, and at the same time blowing up the floccules precipitated on the filter plate 302, so that it continues to participate in the reaction and avoids its accumulation.

[0027] Working principle: Sewage is introduced from the water inlet pipe 103, blocked by the guide plate 104, and flows into the reaction chamber 108 under the umbrella plate 102 in a circular and uniform manner. At this time, under the action of the lifting mixer 107, the sewage is fully in contact with the flocculant in the reaction chamber 108, and the fine impurities in the sewage produce floccules under the action of the flocculant. At the same time, the lifting mixer 107 lifts the produced floccules and sewage into the first cylinder 105, and flows into the separation chamber 201 through the gap between the first cylinder 105 and the second cylinder 106. The floccules entering the separation chamber 201 are precipitated and separated from the sewage, and the separated clean water flows into the water collection tank 2 through the drainage trough 202. 03 and discharged through the drain pipe 204, the flocculants settle downwards and flow back to the reaction chamber 108 through the gap between the outer cylinder 101 and the umbrella plate 102 to continue to participate in the flocculation reaction; when the sewage enters the reaction chamber 108 for flocculation reaction, the air pump 306 works to introduce gas into the vortex tube 303 in the placement box 301 through the air inlet pipe 305, so that the gas is blown into the bottom of the reaction chamber 108 through the blowing hole 304, stirring the water flow in the reaction chamber 108, enhancing the stirring effect, and at the same time blowing up the flocculants precipitated on the filter plate 302, so that it continues to participate in the reaction and avoids its accumulation; when sewage needs to be discharged, it is discharged through the sewage discharge pipe 109.

[0028] 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 clarification tank for sewage treatment, comprising a reaction device for stirring and mixing sewage and a flocculant for flocculation reaction, wherein a separation device for solid-liquid separation and discharge of clean water is arranged on the top of the reaction device, characterized in that: The reaction device also includes a gas stirring device at the bottom thereof for introducing gas from the bottom to stir the floccules; The gas stirring device comprises a placement box (301), a filter plate (302) is arranged on the top of the placement box (301), a vortex tube (303) is installed in the placement box (301), a blowing hole (304) is arranged on the vortex tube (303), an air intake pipe (305) is arranged below the vortex tube (303), and an air pump (306) is arranged on the air intake pipe (305).

2. A clarification tank for sewage treatment according to claim 1, characterized in that: The reaction device comprises an outer cylinder (101), a sewage pipe (109) is arranged at the bottom of the outer cylinder (101), an umbrella-shaped plate (102) is arranged inside the outer cylinder (101), a reaction chamber (108) is formed between the bottom of the umbrella-shaped plate (102) and the bottom of the outer cylinder (101), a stirrer (107) is arranged at the top of the reaction chamber (108), a water inlet pipe (103) is arranged at one side of the outer cylinder (101), the water inlet pipe (103) extends into the reaction chamber (108), a guide plate (104) is arranged below the water inlet pipe (103) and located on one side of the reaction chamber (108), a first cylinder (105) is arranged inside the guide plate (104), and a second cylinder (106) is arranged outside the first cylinder (105).

3. A clarification tank for sewage treatment according to claim 1, characterized in that: The separation device comprises a separation chamber (201), a water collecting trough (203) is arranged on the top of the separation chamber (201), the water collecting trough (203) is annular in shape, a plurality of drainage grooves (202) are evenly arranged on the inner side of the water collecting trough (203), and a drainage pipe (204) is arranged on one side of the outer side of the water collecting trough (203).

4. A clarification tank for sewage treatment according to claim 1, characterized in that: The filter plate (302) is made of 304 stainless steel.

5. A clarification tank for sewage treatment according to claim 2, characterized in that: The bottom of the outer cylinder (101) is in a truncated cone shape.

6. A clarification tank for sewage treatment according to claim 3, characterized in that: Eight drainage grooves (202) are provided.

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