A sewage treatment apparatus

Abstract

The application discloses a sewage treatment device and relates to the technical field of sewage treatment. The sewage treatment device comprises an integrated shell, a T-shaped partition plate, a water inlet, a water outlet groove, a gate and an overflow assembly. The integrated shell is provided with the water inlet and the water outlet groove. The T-shaped partition plate is arranged in the integrated shell and divides the integrated shell into multiple sedimentation tanks and a clarification tank. The water inlet is communicated with the sedimentation tanks. The water outlet groove is arranged on one side of the clarification tank. The gate is arranged on the T-shaped partition plate and is used for opening and closing the valve port on the T-shaped partition plate to open and close the passage between the sedimentation tanks and the clarification tank. The overflow assembly is arranged in the water outlet groove. A drain pipe is vertically connected to the bottom of the water outlet groove. A shunt box is connected to the lower part of the drain pipe and is communicated with the lower part of the clarification tank through two blow-off pipes arranged on the lower end of the shunt box. The T-shaped partition plate is arranged in the integrated shell to divide the integrated shell into multiple sedimentation tanks and a clarification tank. The shunt box is arranged at the middle of the lower part of the integrated shell. The drain pipe and the blow-off pipe are respectively communicated with the shunt box to realize blow-off and reverse cleaning without stopping the machine.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically to a wastewater treatment device. Background Technology

[0002] Industrial wastewater (including wastewater from cold / hot rolling of steel, coal washing, stone processing, papermaking, dyeing and printing, electroplating, food processing, and oilfield produced water) contains large amounts of suspended solids (SS, with concentrations ranging from hundreds to tens of thousands of mg / L), colloidal particles, emulsified oil, and soluble organic matter. Solid-liquid separation and water clarification are the core unit operations in industrial wastewater treatment. Their purpose is to achieve rapid and effective separation of the solid and liquid phases in the shortest possible time and with the smallest possible footprint, so that the turbidity, suspended solids concentration, and color of the treated effluent meet the requirements for discharge or reuse.

[0003] Currently, commonly used solid-liquid separation and water clarification technologies in industry mainly include the following categories: (1) Gravity sedimentation method: This method utilizes the density difference between suspended particles and water to allow the particles to naturally settle to the bottom of the tank under the influence of gravity. Typical equipment includes horizontal flow sedimentation tanks, radial flow sedimentation tanks, and vertical flow sedimentation tanks. To increase the settling area, inclined tubes or inclined plates are added to the tank to form an inclined tube / inclined plate sedimentation tank (Lamella Clarifier). The theoretical basis for this method is the principle of shallow sedimentation (surface load = flow rate / effective settling area).

[0004] (2) Coagulation and sedimentation method: Inorganic coagulants (aluminum salts, iron salts, polyaluminum chloride PAC, etc.) and / or organic polymer flocculants (polyacrylamide PAM) are added at the front end of gravity sedimentation. Through the compression of the double electric layer, adsorption bridging and netting sweeping, the colloids in the water are destabilized and aggregated into larger flocs, which accelerates sedimentation and separation.

[0005] (3) Dissolved air flotation: Microbubbles (30-80 μm in diameter) generated by pressure dissolved air release adhere to the surface of flocs or oil droplets, forming a "gas-solid" or "gas-oil" complex with an apparent density less than that of water, causing it to float to the water surface and be scraped off. Typical processes are dissolved air flotation (DAF) and vortex flotation (CAF).

[0006] (4) Centrifugal separation method: The centrifugal force field (which is much greater than gravity) generated by a hydrocyclone or horizontal screw centrifuge is used to make solid particles migrate radially to the wall surface to achieve separation. Hydrocyclones have a simple structure and no moving parts, and are often used for the pre-concentration of high-concentration slurries.

[0007] (5) Filtration separation method: using porous media (quartz sand, anthracite, fiber balls, metal filter screen, organic / inorganic membrane, etc.) to remove suspended solids in water. According to the filtration precision, it is divided into coarse filtration (>100μm), microfiltration (0.1-10μm), ultrafiltration (0.01-0.1μm) and other levels.

[0008] (6) Magnetic separation method: Magnetic seeds (such as Fe3O4 magnetic powder) are added to form magnetic flocs with coagulants, and then they are quickly separated from the water using a high gradient magnetic field or permanent magnet disk.

[0009] Gravity sedimentation relies on inclined tubes or plates to settle sludge, achieving solid-liquid separation in the wastewater and resulting in clarified water. However, in current wastewater treatment equipment, sedimentation tanks and clarification tanks are interconnected. Cleaning and sludge discharge require system shutdown to remove settled sludge and clean the inclined tubes or plates, a lengthy process that leads to prolonged wastewater treatment downtime. Therefore, this application proposes an integrated wastewater treatment device that allows for sludge discharge and backwashing without system shutdown. Summary of the Invention

[0010] The purpose of this invention is to address the shortcomings of the aforementioned technologies by proposing a wastewater treatment device that solves the problem that the aforementioned wastewater treatment devices require shutdown during cleaning and discharge to remove settled sludge and clean the inclined tubes or inclined plate packings, a process that is lengthy and results in a long wastewater treatment downtime.

[0011] This invention provides a wastewater treatment device, comprising: The integrated housing features an inlet and an outlet. A T-shaped baffle is installed inside the integrated shell, dividing the integrated shell into multiple sedimentation tanks and clarification tanks; the inlet is connected to the sedimentation tank, and the outlet is located on one side of the clarification tank; The gate is located on the T-shaped partition and is used to open and close the valve port on the T-shaped partition to open and close the passage between the sedimentation tank and the clarification tank. Overflow assembly, located inside the outlet tank; The drain pipe is vertically connected to the bottom of the drain trough; The diversion box is connected to the lower part of the drain pipe, and its lower ends are connected to the lower part of the clarification tank through sewage pipes on both sides. Valves are located in the middle of the distribution box and on the drain pipe; When the valve is closed, the overflow water from the clarifier tank is discharged through the drain outlet at the top of the distribution box; When the valve in the middle of the diversion box is closed and the valve on any of the drain pipes is opened, the sludge at the bottom of the clarifier is discharged through the drain outlet at the bottom of the diversion box. When the valve in the middle of the distribution box is opened, and the valve on any of the drain pipes is opened, the drain outlet is closed, and the overflow water in the drain pipe enters the clarification tank through the drain pipe.

[0012] Preferably, the integrated shell has a double-body structure, with the outlet trough being wider at both ends and narrower in the middle, and the drain pipe connected to the middle of the outlet trough. The overflow assembly includes an overflow plate one, a baffle plate, and an overflow plate two. The overflow plate one is located on the upper part of the clarifier tank and on the wider side of the outlet trough. The overflow plate two is located on the side of the overflow plate one near the middle of the outlet trough. The baffle plate is located between the overflow plate one and the overflow plate two, with its lower end extending to two-thirds of the height of the overflow plate one. Multiple triangular protrusions are spaced along the length of the upper part of the overflow plate one and the overflow plate two. An inclined plate is provided from the wide part to the middle of the outlet trough.

[0013] Preferably, the valve is a knife gate valve. An access door is provided on the one-piece housing.

[0014] Preferably, the upper part of the T-shaped baffle is provided with a flow outlet, and the clarifier is equipped with inclined tube packing, with the inclined tube packing and the flow outlet located on the same horizontal plane. The sedimentation tank is equipped with inclined tube packing, and the inlet is located in the middle or upper part of the sedimentation tank, so that the sewage entering the sedimentation tank through the inlet flows through the inclined tube packing to the flow outlet.

[0015] Compared with existing technologies, it has the following beneficial effects: By setting a T-shaped baffle inside the integrated shell, the integrated shell is divided into multiple sedimentation tanks and clarification tanks. A diversion box is set in the middle of the lower part of the integrated shell, and the drainage pipe and sewage pipe are connected to the diversion box respectively, so as to realize sewage discharge and reverse cleaning without stopping the machine. This avoids the problem of downtime caused by sewage discharge and cleaning, and ensures that sewage discharge and cleaning can be carried out simultaneously while the sewage treatment is in normal operation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only preferred embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a top view of a wastewater treatment device according to the present invention.

[0018] Figure 2 This is a side view of a wastewater treatment device according to the present invention.

[0019] Figure 3 This is a schematic diagram of the internal structure of a wastewater treatment device according to the present invention.

[0020] Figure 4 This is a cross-sectional view of a wastewater treatment device according to the present invention.

[0021] Figure 5 for Figure 4 Enlarged diagram of point A in the middle.

[0022] Figure 6 This is a schematic diagram of the flow divider box of the present invention.

[0023] In the diagram, 1-integral casing; 11-water inlet; 12-water outlet; 13-access door; 2-T-shaped baffle; 21-sewage tank; 22-clarification tank; 3-Gate; 4- Overflow assembly; 41- Overflow plate one; 42- Baffle; 43- Overflow plate two; 5-Drain pipe; 6-Diversion box; 61-Drain outlet; 62-Sewage outlet; 7-Valve; 8-Sewage pipe; 9-Telescopic cylinder. Detailed Implementation

[0024] To better understand the structure, functional features, and advantages of the present invention, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings: like Figures 1 to 6 As shown, the present invention provides a wastewater treatment device, comprising: The integrated housing 1 has a water inlet 11 and a water outlet 12; T-shaped baffle 2 is installed inside the integrated shell 1 and divides the integrated shell 1 into multiple sedimentation tanks and clarification tanks 22; the inlet 11 is connected to the sedimentation tank and the outlet trough 12 is located on one side of the clarification tank 22. Gate 3 is mounted on T-shaped partition 2 via electric telescopic cylinder 9 or hydraulic cylinder to open and close the valve port on T-shaped partition 2, thereby opening and closing the passage between sedimentation tank and clarification tank 22; opening gate 3 can connect the bottom of sedimentation tank with clarification tank 22. Overflow component 4 is provided in the outlet tank 12 so that the clarified water in the clarifier 22 enters the outlet tank 12 through the overflow component 4, and the overflow component 4 is used to isolate the floating objects on the clarifier 22. Drain pipe 5 is vertically connected to the bottom of water outlet tank 12 to promptly discharge the clarified water entering water outlet tank 12; Diversion box 6 is connected to the lower part of drain pipe 5. Its lower ends are connected to the lower part of clarification tank 22 through sewage pipe 8. It is equipped with drain outlet 61 and sewage outlet 62 to facilitate simultaneous drainage and sewage discharge. Valve 7 is located in the middle of the diversion box 6 and on the drain pipe 8 to control the flow channel inside the diversion box 6; When valve 7 is closed, the overflow water from clarifier 22 is discharged through drain outlet 61 at the top of distributor 6; When valve 7 located in the middle of the diversion box 6 is closed and valve 7 on any of the drain pipes 8 is opened, the sludge at the bottom of the clarifier 22 is discharged through the drain port 62 at the bottom of the diversion box 6. When valve 7 located in the middle of the diversion box 6 is opened, the drain outlet 61 is closed, and the overflow water in the drain pipe 5 enters the clarification tank 22 through the drain pipe 8.

[0025] See Figure 1 The integrated housing 1 has a double-body structure, and the water outlet 12 has a structure that is wide at both ends and narrow in the middle. The drain pipe 5 is connected to the middle of the water outlet 12 so that the clarified water can overflow from the overflow component 4 and flow to the water outlet in the middle of the water outlet 12.

[0026] See Figure 1 and Figure 5 The overflow assembly 4 includes an overflow plate 1, a baffle 42, and an overflow plate 2 43. The overflow plate 1 41 is located on the upper part of the clarifier 22 and on the wide side of the outlet channel 12. The overflow plate 2 43 is located on the side of the overflow plate 1 41 near the middle of the outlet channel 12. The baffle 42 is located between the overflow plate 1 41 and the overflow plate 2 43. Specifically, the lower end of the baffle 42 extends to two-thirds of the height of the overflow plate 1 41 to block floating objects on the surface of the clarifier 22.

[0027] See Figure 3 Multiple triangular protrusions are spaced along the length of the upper part of overflow plate 41 and overflow plate 43. The overflowing clarified water flows into the drain pipe 5 in the outlet tank 12 through the V-shaped holes between the triangular protrusions. An inclined plate is provided from the wide part to the middle of the outlet tank 12 to facilitate the flow of overflow water into the water outlet of the outlet tank 12.

[0028] See Figure 6 Valve 7 is a knife gate valve, used to control the opening and closing of the sewage pipe 8 and the diversion box 6. An inspection door 13 is provided on the integrated housing 1, allowing access to the sedimentation tank and clarification tank 22 inside the integrated housing 1 for cleaning and maintenance.

[0029] See Figure 1 The upper part of the T-shaped baffle 2 is provided with a flow port, and the clarifier 22 is provided with inclined tube packing. The inclined tube packing in the clarifier 22 is located on the same horizontal plane as the flow port, so as to filter and settle the industrial wastewater and realize the solid-liquid separation of the industrial wastewater.

[0030] See Figure 1The sedimentation tank is equipped with inclined tube packing (not shown). The inlet 11 is located in the middle or upper part of the sedimentation tank so that the sewage entering the sedimentation tank through the inlet 11 flows through the inclined tube packing to the flow outlet and undergoes secondary filtration and sedimentation through the inclined tube packing in the clarification tank 22 to improve the water quality in the clarification tank 22. The clarified water after secondary filtration and sedimentation passes through overflow one, baffle 42 and overflow plate two 43 and enters the outlet tank 12, and is discharged into the drain pipe 5 through the inclined bottom water outlet of the outlet tank 12.

[0031] Working principle of the invention: Industrial wastewater enters the sedimentation tank through the inlet 11 on the integrated shell 1, and is filtered and settled by inclined tube packing to achieve solid-liquid separation. The wastewater flows through the inclined tube packing to the flow outlet and then into the clarification tank 22. The clarified water in the clarification tank 22 enters the space between overflow plate 41 and overflow plate 43 through overflow plate 41. Under the action of baffle 42, floating objects on the surface of the clarified water are blocked, allowing the clarified water to enter the outlet tank 12 through overflow plate 43 and then through the vertically installed drain pipe at the bottom of the outlet tank 12. 5. The water enters the diversion box 6. When valve 7 in the diversion box 6 is closed, the clarified water is discharged from the drain outlet 61 at the top of the diversion box 6. When valve 7 on one of its drain pipes 8 is opened, the clarification tank 22 on one side is discharged. At this time, the sludge is discharged through the drain outlet 62 at the bottom of the diversion box 6. When it is necessary to clean the clarification tank 22 after discharge, open valve 7 at the top of the diversion box 6, close drain outlet 61 and drain outlet 62, so that the clarified water enters the clarification tank 22 through the bottom of the diversion box 6 for backwashing of the inclined tube packing, the clarification tank 22, and the sedimentation tank. During discharge, open gate 3 to connect the two sedimentation tanks to the clarification tank 22 respectively.

[0032] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of the present invention without departing from the scope of the present invention are within the protection scope of the present invention.

Claims

1. A wastewater treatment device, characterized in that... ,include: The integrated housing (1) has an inlet (11) and an outlet (12). A T-shaped partition (2) is provided inside the integrated shell (1) and divides the integrated shell (1) into multiple sedimentation tanks and clarification tanks (22); the inlet (11) is connected to the sedimentation tank, and the outlet (12) is provided on one side of the clarification tank (22); A gate (3) is provided on the T-shaped partition (2) to open and close the valve port on the T-shaped partition (2) to open and close the passage between the sedimentation tank and the clarification tank (22); An overflow assembly (4) is disposed within the outlet tank (12); The drain pipe (5) is vertically connected to the bottom of the water outlet tank (12); The diversion box (6) is connected to the lower part of the drain pipe (5), and its lower ends are connected to the lower part of the clarifier (22) through the sewage pipe (8); Valves (7) are located in the middle of the diversion box (6) and on the drain pipe (8); When the valve (7) is closed, the overflow water of the clarifier (22) is discharged through the drain outlet (61) at the top of the diversion box (6); When the valve (7) located in the middle of the diversion box (6) is closed and the valve (7) on any of the drain pipes (8) is opened, the sludge at the bottom of the clarifier (22) is discharged through the drain port (62) at the bottom of the diversion box (6); When the valve (7) located in the middle of the diversion box (6) is opened, the drain outlet (61) is closed, and the overflow water in the drain pipe (5) enters the clarification tank (22) through the drain pipe (8).

2. The wastewater treatment device according to claim 1, characterized in that, The integrated shell (1) has a double-body structure, the water outlet trough (12) has a structure that is wide at both ends and narrow in the middle, and the drain pipe (5) is connected to the middle of the water outlet trough (12).

3. The wastewater treatment device according to claim 1, characterized in that, The overflow assembly (4) includes an overflow plate one (41), a baffle (42) and an overflow plate two (43). The overflow plate one is located on the upper part of the clarification tank (22) and on the wide side of the outlet trough (12). The overflow plate two (43) is located on the side of the overflow plate one (41) near the middle of the outlet trough (12). The baffle (42) is located between the overflow plate one (41) and the overflow plate two (43).

4. The wastewater treatment device according to claim 3, characterized in that, Multiple triangular protrusions are spaced apart along the length of the upper part of the first overflow plate (41) and the second overflow plate (43).

5. The wastewater treatment device according to claim 4, characterized in that, The water outlet trough (12) is provided with an inclined plate from the width to the middle.

6. The wastewater treatment device according to claim 1, characterized in that, The valve (7) is a knife gate valve.

7. The wastewater treatment device according to claim 1, characterized in that, The integrated housing (1) is provided with an inspection door (13).

8. The wastewater treatment device according to claim 1, characterized in that, The upper part of the T-shaped partition (2) is provided with a flow port, and the clarifier (22) is provided with inclined tube packing. The inclined tube packing in the clarifier (22) and the flow port are located on the same horizontal plane.

9. The wastewater treatment device according to claim 8, characterized in that, The sedimentation tank is equipped with the inclined tube packing material, and the inlet (11) is located in the middle or upper part of the sedimentation tank so that the sewage entering the sedimentation tank through the inlet (11) flows to the flow port through the inclined tube packing material.

10. The wastewater treatment device according to claim 4, characterized in that, The lower end of the baffle (42) extends to two-thirds of the height of the overflow plate (41).

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