Industrial sewage treatment equipment

Abstract

The utility model provides industrial sewage treatment equipment which comprises a coagulation unit, a flocculation unit and a precipitation and concentration unit, the coagulation unit, the flocculation unit and the precipitation and concentration unit are sequentially attached and fixedly arranged, and the tops of the coagulation unit, the flocculation unit and the precipitation and concentration unit are communicated; a stirrer and a guide cylinder are fixedly arranged in the flocculation unit, the stirrer extends into the guide cylinder, and a reverse rotational flow plate is fixedly arranged between the guide cylinder and the tank wall. According to the utility model, the volume of the flocculation basin is utilized, on the premise of higher water flow rate, the reverse rotational flow plate is matched to prevent the sedimentation of suspended matters in water from being hindered due to the rotational flow effect, and floc with smaller volume and higher density is formed by effectively distributing the anionic flocculant and increasing the rotating speed of the impeller.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment equipment, in particular to industrial sewage treatment equipment. Background Art

[0002] The traditional chemical softening method uses the principle of chemical precipitation, that is, according to the solubility product principle, the hardness contained in the water is removed by forming insoluble compounds under the action of appropriate chemicals. The most commonly used method in water treatment is the chemical precipitation of calcium and magnesium ions, followed by the hydroxide precipitation of metal ions. Therefore, its process is often carried out simultaneously with flocculation, precipitation or clarification. The traditional hardness and phosphorus removal process is composed of an inlet buffer tank, a dissolving tank, a mixing tank, a reaction tank, and a sedimentation tank (some also require filtration facilities). The process is long, the chemical mixing is not sufficient, the dosage is large, the effluent compliance rate and equipment investment costs are high, so it is not recommended. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art. The utility model proposes an industrial sewage treatment equipment, which enhances the flocculation and clarification effect by applying dynamic coagulation and adding anionic flocculants to the flocculation unit, removes phosphorus and removes the hardness of raw water at the same time.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: an industrial sewage treatment equipment, including a coagulation unit, a flocculation unit and a sedimentation and concentration unit, the coagulation unit, the flocculation unit and the sedimentation and concentration unit are fixedly arranged in sequence, and the tops of the coagulation unit, the flocculation unit and the sedimentation and concentration unit are connected; an agitator and a guide tube are fixedly arranged in the flocculation unit, the agitator extends into the guide tube, and an anti-cyclonic flow plate is fixedly arranged between the guide tube and the pool wall.

[0005] Furthermore, an annular perforated pipe is arranged above the guide tube, and a cross plate is fixedly arranged below the guide tube.

[0006] Furthermore, a guide plate is fixedly installed at the water inlet of the coagulation unit, a water flow baffle is fixedly installed at the water outlet of the coagulation unit, an agitator is fixedly installed between the guide plate and the water flow baffle, and a cross plate is added below the agitator.

[0007] Furthermore, it also includes a continuous dosing unit for adding coagulant and lime, the continuous dosing unit is fixedly arranged above the coagulation unit, and a flow control unit is added to the continuous dosing unit, and the flow control unit is fixedly arranged at the output end of the continuous dosing unit.

[0008] Furthermore, a flow monitoring unit is fixedly arranged at the input end of the coagulation unit, and a signal output end of the flow monitoring unit is connected to a signal receiving end of the flow control unit.

[0009] Furthermore, a plurality of inclined rods are fixedly arranged at the bottom of the sedimentation and concentration unit, one end of the inclined rod is fixedly connected to the side wall of the sedimentation and concentration unit, and the other ends of the inclined rods are connected to one point, and the inclined rods are 60° to the horizontal direction, and the gaps between adjacent inclined rods are closed by a plate.

[0010] Compared with the prior art, the beneficial effects of the utility model include:

[0011] 1) By using guide plates and agitators, and continuously adding coagulants and lime into the coagulation unit, the dynamic coagulation principle is adopted to ensure that the water flow in and out is controlled on the surface of the reaction tank, avoiding the formation of circles along the tank wall, and extending the water flow as much as possible to enhance the coagulation effect;

[0012] 2) By utilizing the volume of the flocculation tank, under the premise of having a high water flow rate, the anti-cyclonic plate is used to avoid hindering the precipitation of suspended matter in the water due to the cyclonic effect. By effectively distributing the anionic flocculant and increasing the speed of the impeller, flocs with smaller volume and higher density are formed;

[0013] The hexagonal section arranged at the bottom of the sedimentation and concentration unit has an angle of 60° with the horizontal plane, so that the sludge settled on the section can slide smoothly to the bottom without silting up. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0015] Figure 1 The schematic diagram shows the overall cross-section of an industrial wastewater treatment plant;

[0016] Figure 2 The internal structure of the coagulation unit and the flocculation unit is schematically shown.

[0017] Numbers in the figure: 1-coagulation unit, 2-flocculation unit, 3-sedimentation and concentration unit, 4-agitator, 5-guide tube, 6-buffer plate, 7-guide plate, 8-water flow baffle, 9-inclined rod. DETAILED DESCRIPTION

[0018] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction to the technical solution of the utility model.

[0019] like Figure 1 As shown, an industrial wastewater treatment equipment includes a coagulation unit 1, a flocculation unit 2 and a sedimentation and concentration unit 3. The coagulation unit 1, the flocculation unit 2 and the sedimentation and concentration unit 3 are arranged in a sequence from left to right, and the tops of the coagulation unit 1, the flocculation unit 2 and the sedimentation and concentration unit 3 are connected. The implementation method can be to lower the partition between the coagulation unit 1 and the flocculation unit 2 and between the flocculation unit 2 and the sedimentation and concentration unit 3 to a certain height so that it is lower than the side wall height of the industrial wastewater treatment equipment.

[0020] The coagulation unit 1, the flocculation unit 2 and the sedimentation and concentration unit 3 are described one by one below. Figure 2 The internal structure of the coagulation unit and the flocculation unit is schematically shown.

[0021] like Figure 2 As shown, a guide plate 7 is fixedly arranged at the water inlet of the coagulation unit 1 to guide the raw water into the coagulation unit 1. After the raw water enters the coagulation unit 1 from the water inlet, it is guided into the bottom of the coagulation unit 1 by the guide plate 7. A water flow baffle 8 is fixedly arranged at the water outlet of the coagulation unit 1, and an agitator 4 is fixedly arranged between the guide plate 7 and the water flow baffle 8, and a cross plate is added below the agitator 4. The guide plate 7 and the water flow baffle 8 are arranged in conjunction with the agitator 4 in the middle to ensure that the water flow of the inlet and outlet is controlled on the surface of the reaction tank, to avoid the surface water flow forming suction along the tank wall, so that the flow path of the raw water is extended to enhance the coagulation effect.

[0022] A continuous dosing unit for adding coagulants and lime is also provided in the coagulation unit 1. The continuous dosing unit is fixedly provided above the coagulation unit 1. A flow control unit is added in the continuous dosing unit. The flow control unit is fixedly provided at the output end of the continuous dosing unit. A flow monitoring unit is fixedly provided at the input end of the coagulation unit 1. The signal output end of the flow detection unit is connected with the signal receiving end of the flow control unit. The aforementioned continuous dosing unit is used to add coagulants and lime. The coagulant can effectively remove suspended solids, total phosphorus and COD, while the lime can effectively remove temporary hardness. The aforementioned coagulants include ferric chloride and a dephosphorization agent layer, which are not listed one by one in the utility model. The flow information of the raw water entering the coagulation unit 1 is detected according to the aforementioned flow detection unit, and the information is transmitted to the flow control unit to regulate the added coagulant and lime, so as to ensure the treatment effect of the coagulant and lime on the raw water, and avoid the dynamic coagulation process when excessive coagulant and lime are added.

[0023] like Figure 2 As shown, an agitator 4 and a guide tube 5 are fixedly installed in the flocculation unit 2, the agitator 4 extends into the guide tube 5, an anti-cyclonic flow plate is fixedly installed between the guide tube 5 and the pool wall, an annular perforated pipe is arranged above the guide tube 5, a cross plate is fixedly installed below the guide tube 5, and a buffer plate 6 is fixedly installed on the side of the guide tube 5 and the flocculation unit 2 facing the sedimentation concentration unit 3.

[0024] By adding anionic flocculant and polyacrylamide into the aforementioned flocculation unit 2, and then using an agitator, the flocs are promoted to grow and precipitate through physical stirring and intermolecular force, and the volume of the flocculation unit 2 is fully utilized. Compared with the coagulation unit 1, the flocculation unit 2 has a larger volume, and the agitator, the guide tube, and the annular perforated tube above the guide tube arranged in the flocculation unit 2 can obtain a higher water flow rate, and the anti-cyclone plate arranged between the guide tube and the pool wall and the cross plate located below the guide tube can avoid hindering the precipitation of suspended matter in the water due to the cyclone effect; by increasing the rotation speed of the impeller of the agitator, flocs with smaller volume and higher density can be formed.

[0025] A plurality of inclined rods 9 are fixedly arranged at the bottom of the sedimentation and concentration unit 3. One end of the inclined rod 9 is fixedly connected to the side wall of the sedimentation and concentration unit 3, and the other ends of the inclined rods 9 are connected to one point. The inclined rod 9 is 60° with the horizontal direction, and the gap between adjacent inclined rods 9 is closed by the plate body. The aforementioned structure arranged at the bottom of the sedimentation and concentration unit 3 ensures that the sludge settled on the inclined rods 9 can slide smoothly to the bottom without silting. In some embodiments, the number of the aforementioned inclined rods 9 is 6, and the inclined surface is set to a hexagonal cross-section form. The ratio between its projected area and mirror area is higher than that of the inclined rods 9 in the form of an ordinary trapezoidal cross-section, so that a higher effective sedimentation area can be obtained. After the sludge is precipitated and separated at the bottom of the sedimentation and concentration unit 3, part of the sludge flows back to the front coagulation unit 1 through the pipeline, and re-enters the sedimentation and concentration unit 3 after undergoing the coagulation and flocculation process together with the raw water, while the remaining sludge is collected by the scraper and sent to the sludge treatment system.

[0026] The technical scope of the present invention is not limited to the contents described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. An industrial wastewater treatment equipment, characterized in that: The invention comprises a coagulation unit (1), a flocculation unit (2) and a sedimentation concentration unit (3), wherein the coagulation unit (1), the flocculation unit (2) and the sedimentation concentration unit (3) are fixedly arranged in sequence, and the coagulation unit (1), the flocculation unit (2) and the sedimentation concentration unit (3) are connected at the top; an agitator (4) and a guide tube (5) are fixedly arranged in the flocculation unit (2), the agitator (4) extends into the guide tube (5), and an anti-cyclonic flow plate is fixedly arranged between the guide tube (5) and the pool wall.

2. The industrial wastewater treatment equipment according to claim 1, characterized in that: An annular perforated pipe is arranged above the guide tube (5), and a cross plate is fixedly arranged below the guide tube (5).

3. The industrial wastewater treatment equipment according to claim 1, characterized in that: A guide plate (7) is fixedly arranged at the water inlet of the coagulation unit (1), a water flow baffle (8) is fixedly arranged at the water outlet of the coagulation unit (1), an agitator (4) is fixedly arranged between the guide plate (7) and the water flow baffle (8), and a cross plate is additionally arranged below the agitator (4).

4. The industrial wastewater treatment equipment according to claim 3, characterized in that: It also includes a continuous dosing unit for adding coagulant and lime, the continuous dosing unit is fixedly arranged above the coagulation unit (1), and a flow control unit is added to the continuous dosing unit, and the flow control unit is fixedly arranged at the output end of the continuous dosing unit.

5. The industrial wastewater treatment equipment according to claim 4, characterized in that: A flow monitoring unit is fixedly arranged at the input end of the coagulation unit (1), and a signal output end of the flow monitoring unit is connected to a signal receiving end of the flow control unit.

6. The industrial wastewater treatment equipment according to claim 1, characterized in that: A plurality of inclined rods (9) are fixedly arranged at the bottom of the sedimentation and concentration unit (3), one end of the inclined rod (9) is fixedly connected to the side wall of the sedimentation and concentration unit (3), and the other ends of the plurality of inclined rods (9) are connected to one point. The inclined rods (9) are 60 degrees to the horizontal direction, and the gaps between adjacent inclined rods (9) are closed by a plate.

Images