Clarification tank

Abstract

The clarification tank comprises a clarification tank body, a jet pipe, a reaction cylinder, an umbrella-shaped annular plate, a sludge return pipe, a water inlet pipe and a sludge discharge pipe, a conical chamber is designed at the bottom of the clarification tank body, the reaction cylinder is located above the conical chamber, the reaction cylinder is of a cylindrical structure with an opening in the bottom, and the jet pipe is connected with the annular plate. The bottom of the injection pipe is located at the bottom of the conical chamber, the top of the injection pipe is located in the reaction cylinder, the water inlet pipe is connected into the clarification tank body from the bottom of the clarification tank body and extends to the bottom of the injection pipe, a sludge concentration chamber is arranged on the side portion of the conical chamber, the sludge discharge pipe is connected with the sludge concentration chamber, and the sludge discharge pipe is connected with the sludge concentration chamber. The sludge return pipe is respectively communicated with the bottom of the sludge concentration chamber and the bottom of the conical chamber, and an opening control valve is arranged on the sludge return pipe. The technical scheme is used for solving the technical problem that the effluent turbidity exceeds the standard when the load of the existing clarification tank is relatively high.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment structures, and in particular relates to a clarifier. Background Art

[0002] The medium that intercepts and separates impurity particles in the clarifier is suspended sludge. In the clarifier, the sludge is lifted up and placed in a uniformly distributed suspended state, forming a high-concentration stable active sludge layer in the pool, with a suspended matter concentration of about 3 to 10 g / L. Raw water flows from bottom to top in the clarifier, and the sludge layer can be in a dynamic equilibrium state in the rising water flow due to gravity. When the raw water passes through the sludge suspension layer, the suspended matter in the raw water is retained by the sludge suspension layer using the contact flocculation principle, making the water clear. Clear water is collected at the top of the clarifier. However, due to changes in water quality and load, the turbidity value of the effluent, an important indicator of the effluent, varies greatly. In the rainy season or when the load is high, the effluent turbidity sometimes exceeds the standard, reaching more than 10 NTU, and the effluent quality is unqualified. The main reason is that when the water inflow of the clarifier is too high, there is not enough activated sludge in the reaction chamber of the clarifier to react with the sewage, which makes it difficult for the suspended matter in some sewage to settle. Utility Model Content

[0003] Aiming at the technical problem that the effluent turbidity of the existing clarifier exceeds the standard when the load is high, the utility model provides a clarifier which can ensure the full reaction of the activated sludge and the sewage when the influent load is high, thereby ensuring the effluent quality.

[0004] The utility model provides a clarifier, comprising a clarifier body, an injection pipe, a reaction cylinder, an umbrella-shaped annular plate, a sludge return pipe, a water inlet pipe and a sludge discharge pipe, wherein a conical chamber is designed at the bottom of the clarifier body, the reaction cylinder is located above the conical chamber, the reaction cylinder is a cylindrical structure with an opening at the bottom, the bottom of the injection pipe is located at the bottom of the conical chamber, the top of the injection pipe is located in the reaction cylinder, the water inlet pipe is connected from the bottom of the clarifier body and extends to the bottom of the injection pipe, an overflow trough is arranged at the top of the clarifier body, the umbrella-shaped annular plate is located below the reaction cylinder and is arranged around the injection pipe, a sludge concentration chamber is arranged at the side of the conical chamber, the sludge discharge pipe is connected to the sludge concentration chamber, the sludge return pipe is connected to the sludge concentration chamber and the bottom of the conical chamber respectively, an opening control valve is arranged on the sludge return pipe, and a flow detection device is arranged on the water inlet pipe.

[0005] Furthermore, the opening control valve is an electrically controlled valve.

[0006] Furthermore, the clarification tank also includes a controller, and the control valve is electrically connected to the opening control valve and the flow detection device respectively.

[0007] When the clarifier is working normally, the opening control valve is in a closed state, so that the sewage entering from the water inlet pipe drives the sludge in the conical chamber to be sprayed from the injection pipe into the reaction cylinder, so that the sewage and activated sludge are fully reacted and flocculated, and the excess activated sludge enters the sludge concentration chamber. When the flow detection device detects that the water inlet flow load is high, at this time, by opening the opening control valve, part of the activated sludge in the sludge concentration chamber flows back to the conical chamber, thereby ensuring that there is enough sludge to react with the sewage and improving the effluent quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 A schematic diagram of the structure of a clarification tank. DETAILED DESCRIPTION

[0010] The utility model discloses a clarifier, which can ensure the full reaction of activated sludge and sewage when the water inlet load is high, and ensure the quality of effluent water.

[0011] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution in the utility model. Obviously, what is described is only a 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 making creative work are within the scope of protection of the utility model.

[0012] See also Figure 1As shown, the utility model discloses a clarifier, including a clarifier body, an injection pipe 10, a reaction cylinder 11, an umbrella-shaped annular plate 9, a sludge return pipe 3, a water inlet pipe 7 and a sludge discharge pipe 5. The bottom of the clarifier body is designed with a conical chamber 8, the reaction cylinder 11 is located above the conical chamber 8, the reaction cylinder 11 is a cylindrical structure with an open bottom, the bottom of the injection pipe 10 is located at the bottom of the conical chamber 8, the top of the injection pipe 10 is located in the reaction cylinder 11, the water inlet pipe 7 is connected to the clarifier body, and the clarifier body is provided with a conical chamber 8. The bottom of the clarifier tank is connected to and extends to the bottom of the injection pipe 10, the top of the clarifier tank body is provided with an overflow groove 12, the umbrella-shaped annular plate 9 is located below the reaction cylinder 11 and is arranged around the injection pipe 10, the side of the conical chamber 8 is provided with a sludge concentration chamber 1, the sludge discharge pipe 5 is connected to the sludge concentration chamber 1, the sludge return pipe 3 is respectively connected to the sludge concentration chamber 1 and the bottom of the conical chamber 8, the sludge return pipe 3 is provided with an opening control valve 24, and the water inlet pipe 7 is provided with a flow detection device 6.

[0013] The opening control valve 24 is an electrically controlled valve.

[0014] The clarifier tank further includes a controller, and the control valve 2 is electrically connected to the opening control valve 24 and the flow detection device 6 respectively.

[0015] When the clarifier is working normally, the opening control valve 24 is in a closed state, so that the sewage entering from the water inlet pipe 7 drives the sludge in the conical chamber 8 to be sprayed from the injection pipe 10 into the reaction cylinder 11, so that the sewage and activated sludge are fully reacted and flocculated, and the excess activated sludge enters the sludge concentration chamber 1. When the flow detection device 6 detects that the water inlet flow load is high, at this time, by opening the opening control valve 24, part of the activated sludge in the sludge concentration chamber 1 flows back to the conical chamber 8, thereby ensuring that there is enough sludge to react with the sewage and improving the effluent quality.

[0016] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A clarification tank, characterized in that: The utility model comprises a clarifier body, an injection pipe, a reaction cylinder, an umbrella-shaped annular plate, a sludge return pipe, a water inlet pipe and a sludge discharge pipe. A conical chamber is designed at the bottom of the clarifier body, the reaction cylinder is located above the conical chamber, the reaction cylinder is a cylindrical structure with an opening at the bottom, the bottom of the injection pipe is located at the bottom of the conical chamber, the top of the injection pipe is located in the reaction cylinder, the water inlet pipe is connected from the bottom of the clarifier body and extends to the bottom of the injection pipe, an overflow trough is arranged at the top of the clarifier body, the umbrella-shaped annular plate is located below the reaction cylinder and is arranged around the injection pipe, a sludge concentration chamber is arranged on the side of the conical chamber, the sludge discharge pipe is connected to the sludge concentration chamber, the sludge return pipe is connected to the sludge concentration chamber and the bottom of the conical chamber respectively, an opening control valve is arranged on the sludge return pipe, and a flow detection device is arranged on the water inlet pipe.

2. A clarification tank according to claim 1, characterized in that: The opening control valve is an electrically controlled valve.

3. A clarification tank according to claim 2, characterized in that: The clarifier tank also includes a controller, and the control valve is electrically connected to the opening control valve and the flow detection device respectively.

Images