Gas collection separation tank capable of efficiently removing sludge foam

Abstract

The utility model discloses a gas collecting and separating tank for efficiently removing sludge foam, which comprises a gas collecting tank, a rising gas pipe, a stirrer, a sealed water tank, a gas outlet pipe and a backflow downcomer, the gas collecting tank is in a conical barrel shape, the bottom of the gas collecting tank is connected with the rising gas pipe and the backflow downcomer, a top pipe orifice of the rising gas pipe extends into the gas collecting tank, and the extending height is not more than 0.2 m; a top pipe opening of the ascending gas pipe is in a funnel shape, the top of the gas collection tank is rotationally connected with a stirrer, the joint of the stirrer and the gas collection tank is sealed through flexible rubber, a sealing water tank is arranged at the joint of the gas collection tank and the stirrer, and a stirring impeller is arranged on the stirrer and composed of stirring strips arranged in the circumferential direction of a stirring shaft. The air outlet pipe is connected to the top of the air collecting tank and provided with a negative pressure pump. The utility model solves the problem that the gas collecting pipeline of the gas collecting tank of the traditional anaerobic reactor is easily blocked when the gas collecting tank faces impact load or treats high-concentration organic matter and high-suspended matter wastewater to generate hydrophilic sludge foam, and reduces the loss of sludge at the same time.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and particularly relates to a gas collecting and separating tank for efficiently removing sludge foam. Background Art

[0002] In the treatment of high-concentration organic wastewater, anaerobic reaction is basically a necessary process, and anaerobic reactors such as UASB, IC and EGSB are usually selected. However, in actual projects, when anaerobic reactors are under shock load or high load, especially when the sugar content in the influent is high, the extracellular polymers produced are highly hydrophilic, which easily produces highly hydrophilic sludge foam. The production of biogas easily brings the sludge foam into the top gas collecting tank. The sludge foam is highly hydrophilic and difficult to dissipate, resulting in increased pressure in the exhaust pipe, which may eventually cause the three-phase separator to deform or shift. In severe cases, the three-phase separator floats as a whole, causing irreparable losses. Utility Model Content

[0003] The utility model aims to address the deficiencies of the prior art and propose a gas collection and separation tank for efficiently removing sludge foam. The equipment, based on the hydrophilic property of sludge foam, stirs the sludge foam to make it larger and then returns it to the reactor after it breaks under negative pressure, thereby achieving pure collection of biogas.

[0004] The technical purpose of this utility model is achieved through the following technical solutions:

[0005] A gas collecting and separating tank for efficiently removing sludge foam comprises a gas collecting tank, an ascending air pipe, an agitator, a sealed water tank, an air outlet pipe and a reflux downcomer, wherein the gas collecting tank is a conical barrel type, the bottom of the gas collecting tank is connected to the ascending air pipe and the reflux downcomer, wherein the top pipe opening of the ascending air pipe extends into the gas collecting tank but the extension height does not exceed 0.2m, the top pipe opening of the ascending air pipe is funnel-shaped, the top of the gas collecting tank is rotatably connected to the agitator, the connection between the agitator and the gas collecting tank is sealed with a flexible rubber seal, the connection between the gas collecting tank and the agitator is provided with a sealed water tank, the agitator is provided with a stirring impeller, and the stirring impeller is composed of stirring bars arranged along the circumferential direction of the stirring shaft; the air outlet pipe is connected to the top of the gas collecting tank, and the air outlet pipe is provided with a negative pressure pump.

[0006] Preferably, the material grade of the gas collecting tank is not lower than 304 stainless steel.

[0007] Preferably, the stirring bar is a long strip of PVC material with a width of 1-3 cm and a thickness of 1-3 mm.

[0008] Preferably, two groups of stirring impellers are included, and the two groups of stirring impellers are respectively connected to the stirring shaft at different heights.

[0009] Preferably, the water tank height of the sealed water tank is 12-16 cm, and the water tank liquid level is not less than 10 cm.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model provides a gas collecting and separating tank for efficiently removing sludge foam, which solves the problem of gas collecting tanks of traditional anaerobic reactors being clogged in gas collecting pipelines when facing impact loads or treating high-concentration organic matter and high-suspended matter wastewater that is prone to produce hydrophilic sludge foam, while reducing sludge loss.

[0012] Specifically, the utility model gas collecting tank adopts a conical barrel design to better avoid the accumulation of sludge foam, and the stirring impeller uses lightweight PVC material instead of the traditional impeller, which can achieve the stirring of bubbles with low energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a schematic structural diagram of an embodiment.

[0014] In the above drawings:

[0015] 1. Gas collecting tank; 2. Ascending air pipe; 3. Agitator; 3-1. Stirring impeller; 3-2. Stirring shaft; 3-3. Stirring bar; 4. Sealed water tank; 5. Air outlet pipe; 5-1. Negative pressure pump; 6. Reflux downcomer. DETAILED DESCRIPTION

[0016] 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.

[0017] As a preferred embodiment of the utility model of a gas collection and separation tank for efficiently removing sludge foam, Figure 1As shown, this embodiment provides a gas collection and separation tank for efficiently removing sludge foam, including a gas collection tank 1, an ascending air pipe 2, an agitator 3, a sealed water tank 4, an air outlet pipe 5 and a reflux downcomer 6. The gas collection tank 1 is a conical barrel type, and the bottom of the gas collection tank 1 is connected to the ascending air pipe 2 and the reflux downcomer 6, wherein the top pipe opening of the ascending air pipe 2 extends into the gas collection tank 1 but the extension height does not exceed 0.2m, and the top pipe opening of the ascending air pipe 2 is funnel-shaped, so that the bubbles generated can be quickly removed through the conical funnel-shaped ascending air pipe 2 The drainage enters the gas collecting tank 1, and the top of the gas collecting tank 1 is rotatably connected to the stirrer 3. The connection between the stirrer 3 and the gas collecting tank 1 adopts a flexible rubber seal. The connection between the gas collecting tank 1 and the stirrer 3 is provided with a sealing water tank 4, which is used for water pressure sealing of the connection between the stirrer 3 and the gas collecting tank 1. The stirrer is provided with a stirring impeller 3-1, and the stirring impeller 3-1 is composed of stirring bars 3-3 arranged along the circumferential direction of the stirring shaft 3-2; the air outlet pipe 5 is connected to the top of the gas collecting tank 1, and the air outlet pipe 5 is provided with a negative pressure pump 5-1.

[0018] In some embodiments, in order to increase its service life, prevent corrosion, and simplify maintenance, the material grade of the gas collecting tank 1 in this embodiment is not lower than stainless steel 304.

[0019] In some preferred embodiments, the stirring bar 3-3 is a long strip of PVC material with a width of 1-3 cm and a thickness of 1-3 mm. The stirring bar made of PVC material has a certain elasticity and can be displaced at a certain angle according to the foam situation in the gas collecting tank 1, which has a better stirring and crushing effect and can reduce the manufacturing cost.

[0020] In some preferred embodiments, in order to further improve the efficiency of breaking foam, the present embodiment includes two groups of stirring impellers 3-1, and the two groups of stirring impellers 3-1 are respectively connected to the stirring shaft 3-2 at different heights.

[0021] In other embodiments, in order to ensure the reliability of sealing, the water tank height of the sealed water tank 4 in this embodiment is 12-16 cm, and the water tank liquid level is not less than 10 cm.

[0022] During the sludge treatment process, the biogas produced by the anaerobic reactor is discharged through the three-phase separator and first enters the gas collecting tank 1 through the ascending gas pipe 2. Figure 1 As shown, the arrows in the figure represent the flow direction of biogas / bubbles and sediment. When in use, the gas collecting tank 1 of the utility model is connected to the top of the anaerobic reactor. When a large amount of hydrophilic sludge foam is produced in the reactor, the foam is difficult to break and accumulates in the gas collecting tank 1. The agitator 3 is started to gradually increase the hydrophilic floating mud foam under stirring, and the foam is easily broken under the joint action of the micro-negative pressure pump 5-1 on the outlet pipe 5. The biogas is discharged through the top outlet pipe 5, and the deposited sediment returns to the reactor through the reflux downcomer 6.

[0023] In order to ensure the sealing of the gas collecting tank, a sealing water tank 4 is set at the connection between the agitator 3 and the gas collecting tank 1. At the same time, the sealing condition of the connection between the agitator 3 and the gas collecting tank 1 can be judged according to the change of the liquid level of the sealing water tank 4, and the sealing ring of the connection can be replaced in time.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A gas collection and separation tank for efficiently removing sludge foam, characterized in that: The invention comprises an air collecting tank (1), an ascending air pipe (2), an agitator (3), a sealed water tank (4), an air outlet pipe (5) and a reflux down pipe (6), wherein the air collecting tank (1) is of a cone barrel type, the bottom of the air collecting tank (1) is connected to the ascending air pipe (2) and the reflux down pipe (6), wherein the top pipe opening of the ascending air pipe (2) extends into the air collecting tank (1) but the extension height does not exceed 0.2 m, the top pipe opening of the ascending air pipe (2) is funnel-shaped, the top of the air collecting tank (1) is rotatably connected to the agitator (3), the connection between the agitator (3) and the air collecting tank (1) is sealed with a flexible rubber, the connection between the air collecting tank (1) and the agitator (3) is provided with a sealed water tank (4), the agitator is provided with a stirring impeller (3-1), the stirring impeller (3-1) is composed of stirring bars (3-3) arranged along the circumferential direction of a stirring shaft (3-2); the air outlet pipe (5) is connected to the top of the air collecting tank (1), and the air outlet pipe (5) is provided with a negative pressure pump (5-1).

2. The gas collection and separation tank for efficiently removing sludge foam according to claim 1 is characterized in that: The material grade of the gas collecting tank (1) is not lower than stainless steel 304.

3. The gas collection and separation tank for efficiently removing sludge foam according to claim 1 is characterized in that: The stirring bar (3-3) is a long strip made of PVC with a width of 1-3 cm and a thickness of 1-3 mm.

4. The gas collection and separation tank for efficiently removing sludge foam according to claim 1 is characterized in that: It comprises two groups of stirring impellers (3-1), and the two groups of stirring impellers (3-1) are respectively connected to the stirring shaft (3-2) at different heights.

5. The gas collection and separation tank for efficiently removing sludge foam according to claim 1 is characterized in that: The water tank height of the sealed water tank (4) is 12-16 cm, and the water tank liquid level is not less than 10 cm.

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