Integrated wastewater pretreatment device and wastewater treatment equipment

Abstract

The invention relates to the technical field of wastewater treatment, in particular to an integrated wastewater pretreatment device and wastewater treatment equipment.The integrated wastewater pretreatment device comprises a flocculation tank, a first filtering piece, a first flashboard, a second flashboard and a driving mechanism, the first filtering piece is arranged at the inner bottom of the flocculation tank, and the second filtering piece is arranged at the inner bottom of the flocculation tank; a liquid outlet cavity is formed in the interval between the first filter part and the bottom wall of the flocculation tank, the first gate plate is arranged in the flocculation tank and is vertically spaced from the first filter part, a first liquid through hole is formed in the eccentric position of the first gate plate, and the second gate plate is horizontally and rotatably arranged in the flocculation tank and is vertically attached to the second gate plate; a second liquid through hole is formed in the eccentric position of the second flashboard; the driving mechanism can drive the second flashboard to rotate, so that the second liquid through hole and the first liquid through hole are completely staggered or at least partially overlapped; flocculation and filtration are realized by utilizing a single flocculation tank, so that the integrated wastewater pretreatment device is convenient to mount and transfer.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to an integrated wastewater pre-treatment device and wastewater treatment equipment. Background Art

[0002] In power transmission and transformation projects, wastewater is generated during the excavation of foundation pits, flushing of mechanical equipment, commissioning of substation main transformers, and operation and maintenance. The pollutants in these wastewaters are oil and suspended matter, which will have adverse effects on humans, animals, plants and even the entire ecosystem. Therefore, wastewater treatment equipment is needed to treat them.

[0003] The pre-treatment device of wastewater treatment equipment usually includes a flocculation tank, a water pump and a filter tank. When pre-treating wastewater, the sewage is first flocculated by the flocculation tank, and then the flocculated sewage is pumped into the filter tank for filtration by the water pump, thereby achieving the pre-treatment of the wastewater. However, the setting of the flocculation tank, the filter tank and the water pump requires a large space and is not convenient for transportation and installation, which affects the wastewater treatment efficiency. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing integrated wastewater pre-treatment device needs to be equipped with a flocculation tank, a water pump and a filter tank separately, which is inconvenient to install and transport, and affects the wastewater treatment efficiency.

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide an integrated wastewater pretreatment device, comprising:

[0006] Flocculation tank;

[0007] A first filter element, the first filter element is arranged at the inner bottom of the flocculation tank and is spaced apart from the bottom wall of the flocculation tank;

[0008] a first gate plate, the first gate plate being arranged in the flocculation tank and spaced apart from the first filter element, and a first liquid-passing hole being arranged at an eccentric position of the first gate plate;

[0009] a second gate plate, the second gate plate being horizontally rotatably disposed in the flocculation tank and being in contact with the second gate plate from top to bottom, and a second liquid-passing hole being disposed at an eccentric position of the second gate plate;

[0010] A driving mechanism, the driving mechanism includes a connecting rod, a gear ring, a first gear and a rotating driving member arranged in the flocculation tank, the gear ring is arranged close to the top wall of the flocculation tank, the lower end of the connecting rod is connected to the edge of the second gate plate, the upper end of the connecting rod is connected to the gear ring, the first gear is meshed with the gear ring, and the output end of the rotating driving member is connected to the first gear to drive the first gear to rotate, drive the second gate plate and the gear ring to rotate synchronously, so that the second liquid hole and the first liquid hole are completely staggered or the second liquid hole and the first liquid hole are at least partially overlapped.

[0011] As a preferred embodiment, the integrated wastewater pretreatment device also includes a first stirring paddle and a first motor, the blade portion of the first stirring paddle is arranged in the flocculation tank and is located between the second gate plate and the top wall of the flocculation tank; the paddle shaft portion of the first stirring paddle passes upward through the top wall of the flocculation tank, and the first motor is connected to the flocculation tank and connected to the paddle shaft portion of the first stirring paddle.

[0012] As a preferred embodiment, the integrated wastewater pretreatment device also includes a second gear, a third gear and a second stirring paddle; the second stirring paddle is arranged in parallel and spaced apart from the first stirring paddle, the blade portion of the second stirring paddle is arranged in the flocculation tank and is located between the second gate plate and the top wall of the flocculation tank, the paddle shaft portion of the second stirring paddle passes upward through the top wall of the flocculation tank and is connected to the second gear, the third gear is connected to the outside of the paddle shaft of the first stirring paddle, and the second gear is meshed with the third gear.

[0013] As a preferred embodiment, the integrated wastewater pretreatment device also includes: a mounting plate and a telescopic drive mechanism, the lower end of the telescopic drive mechanism is connected to the flocculation tank, the upper end of the telescopic drive mechanism is connected to the mounting plate, and the first motor is fixed on the mounting plate; the telescopic drive mechanism drives the mounting plate to move up and down, driving the first agitator paddle and the second agitator paddle to move up and down.

[0014] As a preferred solution, a plurality of the first liquid through holes and the second liquid through holes are provided, and each of the first liquid through holes and the second liquid through holes is arranged at intervals around the axial direction of the flocculation tank;

[0015] By rotating the second gate plate, each of the first liquid passage holes and each of the second liquid passage holes can be completely staggered or completely overlapped.

[0016] As a preferred solution, each of the first liquid-passing holes and each of the second liquid-passing holes are both fan-shaped.

[0017] A wastewater treatment device, comprising the above-mentioned integrated wastewater pre-treatment device, wherein the bottom of the flocculation tank of the integrated wastewater pre-treatment device is provided with a first liquid outlet, and the wastewater treatment device further comprises a fine filtration device, wherein the fine filtration device comprises a filtration tank, a liquid storage tank storing a diatomaceous earth suspension, and a circulation pump;

[0018] A second filter is provided in the middle of the tank cavity of the filter tank, and the second filter divides the tank cavity into a first cavity located at the upper part and a second cavity located at the lower part, the first liquid outlet is connected to the first cavity, and a second liquid outlet is provided at the bottom of the second cavity;

[0019] The liquid storage tank is in communication with the first cavity or the second cavity;

[0020] The water inlet of the circulation pump is communicated with the second cavity, and the water outlet of the circulation pump is communicated with the first cavity. The circulation pump is used to pump the diatomaceous earth suspension flowing into the second cavity to the first cavity.

[0021] As a preferred solution, the wastewater treatment equipment further comprises a backwashing water supply pipe, and a liquid outlet end of the backwashing water supply pipe is connected to the second cavity.

[0022] As a preferred solution, the wastewater treatment equipment further comprises an air flotation device, wherein a liquid inlet end of the air flotation device is communicated with the first liquid outlet, and a liquid outlet end of the air flotation device is communicated with the first cavity.

[0023] As a preferred embodiment, the wastewater treatment equipment further comprises an electrochemical oxidation tank, and the liquid inlet end of the electrochemical oxidation tank is connected to the second liquid outlet.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The integrated wastewater pretreatment device of the present invention comprises a flocculation tank, a first filter element, a first gate plate, a second gate plate and a driving mechanism, wherein the first filter element is arranged at the inner bottom of the flocculation tank and is spaced apart from the bottom wall of the flocculation tank, the space between the first filter element and the bottom wall of the flocculation tank forms a liquid outlet cavity, the first gate plate is arranged in the flocculation tank and is spaced apart from the first filter element, a first liquid through hole is provided at an eccentric position of the first gate plate, the second gate plate is horizontally rotatably arranged in the flocculation tank and is fitted up and down with the second gate plate, a second liquid through hole is provided at an eccentric position of the second gate plate; the space between the first gate plate and the first filter element forms a static pressure cavity, the space between the second gate plate and the tank top of the flocculation tank forms a flocculation cavity, the driving mechanism comprises a connecting rod, a gear ring, a first gear and a rotating driving member arranged outside the flocculation tank, the gear ring is arranged close to the top wall of the flocculation tank, the lower end of the connecting rod is connected to the edge of the second gate plate, the upper end of the connecting rod is connected to the gear ring, the first gear is meshed with the gear ring, and the rotating driving member The output end is connected to the first gear transmission to drive the first gear to rotate, drive the second gate plate and the gear ring to rotate synchronously, so that the second liquid hole and the first liquid hole are completely staggered or the second liquid hole and the first liquid hole are at least partially overlapped; when in use, the second gate plate is first driven by the driving mechanism to rotate, so that the second liquid hole and the first liquid hole are completely staggered. At this time, the flocculation chamber and the filter chamber are isolated, and the sewage can be flocculated in the flocculation chamber. After the sewage flocculation is completed, the second gate plate is driven by the driving mechanism to rotate, so that the second liquid hole and the first liquid hole are at least partially overlapped. At this time, the static pressure chamber and the flocculation chamber are connected, and the sewage in the flocculation chamber flows into the static pressure chamber, and flows evenly through the static pressure chamber on the first filter, and the sewage filtered by the first filter element flows into the water outlet chamber; therefore, the integrated wastewater pretreatment device of the present invention realizes flocculation and filtration by a single flocculation tank, greatly reduces the volume of the integrated wastewater pretreatment device, and facilitates the installation and transportation of the integrated wastewater pretreatment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the integrated wastewater pre-treatment device of the present invention;

[0027] Figure 2 It is an axonometric view of the fine filtration device;

[0028] Figure 3 is a cross-sectional view of a fine filtering device;

[0029] Figure 4 A schematic diagram of the structure of the filtering pre-coat layer on the second filter element;

[0030] Figure 5 It is a schematic diagram of the structure of the filter pre-coat layer adsorbing impurities during the filtration process of the fine filtration device;

[0031] Figure 6 is a schematic diagram of backwashing;

[0032] Figure 7 The schematic diagram of the structure of the wastewater pre-treatment equipment of the present invention is

[0033] In the figure, 11, flocculation tank, 111, first liquid outlet, 12, first filter element, 13, first gate, 131, first liquid hole, 14, second gate, 141, second liquid hole, 151, connecting rod, 152, ring gear, 153, first gear, 154, rotating drive member, 161, first stirring paddle, 1611, first blade, 162, first motor, 163, second gear, 164, third gear, 165, second stirring paddle, 1651, second blade, 171, mounting plate, 172, telescopic drive device, 21, filter tank, 211, first cavity, 212, second cavity, 22, liquid storage tank, 23, circulation pump, 24, second filter element, 25, backwashing water supply pipe, 3, flotation device, 4, electrochemical oxidation tank, 5, liquid pump, 6, filter pre-coating, 7, diatomaceous earth impurity mixture, 8, base. DETAILED DESCRIPTION

[0034] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.

[0036] like Figure 1As shown, a preferred embodiment of the integrated wastewater pretreatment device of the present invention comprises a flocculation tank 11, a first filter element 12, a first gate plate 13, a second gate plate 14 and a driving mechanism, wherein the first filter element 12 is arranged at the inner bottom of the flocculation tank 11 and is arranged with a vertical interval with the bottom wall of the flocculation tank 11, and the interval between the first filter element 12 and the bottom wall of the flocculation tank 11 forms a liquid outlet cavity, the first gate plate 13 is arranged in the flocculation tank 11 and is arranged with a vertical interval with the first filter element 12, a first liquid through hole 131 is provided at an eccentric position of the first gate plate 13, and the second gate plate 14 is arranged to rotate horizontally in the flocculation tank 11. 1, and is fitted with the second gate plate 14 up and down, and the second gate plate 14 is provided with a second liquid-passing hole 141 at an eccentric position; the interval between the first gate plate 13 and the first filter element 12 forms a static pressure chamber, and the interval between the second gate plate 14 and the tank top of the flocculation tank 11 forms a flocculation chamber, and the driving mechanism includes a connecting rod 151, a gear ring 152, a first gear 153 and a rotating driving member 154 arranged outside the flocculation tank 11, the gear ring 152 is arranged close to the top wall of the flocculation tank 11, the lower end of the connecting rod 151 is connected to the edge of the second gate plate 14, and the upper end of the connecting rod 151 is connected to the gear ring 152, the first gear 153 is meshed with the gear ring 152, and the output end of the rotary driving member 154 is connected to the first gear 153 to drive the first gear 153 to rotate, so as to drive the second gate plate 14 to rotate synchronously with the gear ring 152, so that the second liquid hole 141 and the first liquid hole 131 are completely staggered or the second liquid hole 141 and the first liquid hole 131 are at least partially overlapped; when in use, the second gate plate 14 is first driven by the driving mechanism to rotate so that the second liquid hole 141 and the first liquid hole 131 are completely staggered, at this time the flocculation chamber and the filtration chamber are isolated, and the flocculation chamber can be used for filtering. The sewage is flocculated. After the sewage flocculation is completed, the driving mechanism is used to drive the second gate plate 14 to rotate so that the second liquid hole 141 and the first liquid hole 131 at least partially overlap. At this time, the static pressure chamber and the flocculation chamber are connected, and the sewage in the flocculation chamber flows into the static pressure chamber and flows evenly through the static pressure chamber on the first filter. The sewage filtered by the first filter element 12 flows into the water outlet chamber; therefore, the integrated wastewater pretreatment device of the present invention realizes flocculation and filtration using a single flocculation tank 11, greatly reducing the volume of the integrated wastewater pretreatment device, and facilitating the installation and transportation of the integrated wastewater pretreatment device.

[0037] Specifically, the rotary drive member 154 can be a rotating wheel, and the staff rotates the rotating wheel to realize the rotation of the second gate plate. In this embodiment, the rotary drive member 154 is a motor. The rotary drive member is fixed to the upper end of the flocculation tank 11, and the driving shaft of the rotary drive member 154 passes downward through the top wall of the flocculation tank 11 and is fixedly connected to the first gear 153; to ensure the stability of the second gate plate 14, in this embodiment, a plurality of connecting rods 151 are provided, and the plurality of connecting rods 151 are arranged axially at intervals around the gear ring 152, and the upper end of each connecting rod 151 is fixedly connected to the lower end of the gear ring 152, and the lower end of each connecting rod 151 is fixedly connected to the upper end of the second gate plate 14 near the edge.

[0038] In this embodiment, a flocculant addition port and a sewage inlet pipe are provided on the upper outer side of the flocculation chamber. To ensure uniform mixing of the flocculant and the sewage during flocculation, in this embodiment, the integrated wastewater pre-treatment device further includes a first stirring paddle 161 and a first motor 162. The blade portion of the first stirring paddle 161 is arranged in the flocculation tank 11 and is located between the second gate plate 14 and the top wall of the flocculation tank 11; the paddle shaft portion of the first stirring paddle 161 passes through the top wall of the flocculation tank 11 upward, and the first motor 162 is connected to the flocculation tank 11 and is connected to the paddle shaft portion of the first stirring paddle 161. Specifically, the first motor 162 drives the first stirring paddle 161 to rotate, thereby accelerating the mixing of the sewage and the flocculant in the flocculation chamber.

[0039] Furthermore, the integrated wastewater pre-treatment device further includes a second gear 163, a third gear 164 and a second stirring paddle 165; the second stirring paddle 165 is arranged in parallel and spaced apart from the first stirring paddle 161, the blade portion of the second stirring paddle 165 is arranged in the flocculation tank 11, and is located between the second gate plate 14 and the top wall of the flocculation tank 11, the paddle shaft portion of the second stirring paddle 165 passes upward through the top wall of the flocculation tank 11 and is connected to the second gear 163, the third gear 164 is connected to the outside of the paddle shaft of the first stirring paddle 161, and the second gear 163 is meshed with the third gear 164. Specifically, the first motor 162 rotates, and while driving the first stirring paddle 161 to rotate, it drives the third gear 164 to rotate in the opposite direction, and the third gear 164 drives the second stirring paddle 165 to rotate, and the second stirring paddle 165 rotates in the opposite direction to the first stirring paddle 161, further improving the stirring effect. Among them, the blade of the first stirring paddle 161 is defined as the first blade, and the blade of the second stirring paddle 165 is defined as the second blade. The first blades and the second blades are alternately arranged in the vertical direction. The sum of the blade length and the second blade length is defined as L1, and the distance between the paddle shaft of the first stirring paddle 161 and the paddle shaft of the second stirring paddle 165 is defined as L2. Then L2 is less than L1, so that the stirring range of the first stirring paddle 161 and the stirring range of the second stirring paddle 165 have an overlapping area, further improving the stirring effect.

[0040] Furthermore, in this embodiment, the integrated wastewater pre-treatment device further includes: a mounting plate 171 and a telescopic drive mechanism, the lower end of the telescopic drive mechanism is connected to the flocculation tank 11, the upper end of the telescopic drive mechanism is connected to the mounting plate 171, and the first motor 162 is fixed on the mounting plate 171; the telescopic drive mechanism drives the mounting plate 171 to move up and down, driving the first stirring paddle 161 and the second stirring paddle 165 to move up and down. Specifically, in this embodiment, the telescopic drive mechanism includes an electric push rod, which extends or shortens at a certain frequency, thereby driving the mounting plate 171 to move up and down at a certain frequency. While the mounting plate 171 moves up and down, the first motor 162 drives the first stirring paddle 161 and the second stirring paddle 165 to rotate, so that the first stirring paddle 161 and the second stirring paddle 165 reciprocate up and down while rotating, further improving the stirring effect.

[0041] In this embodiment, in order to improve the filtration speed and ensure the uniformity of the sewage distribution on the first filter element 12, a plurality of first liquid holes 131 and second liquid holes 141 are provided, and each of the first liquid holes 131 and the second liquid holes 141 is arranged at intervals in the axial direction around the flocculation tank 11; by rotating the second gate plate 14, the first liquid holes 131 and the second liquid holes 141 can be completely staggered or completely overlapped.

[0042] Specifically, each first liquid hole 131 and each second liquid hole 141 are in a fan shape. Setting the first liquid hole 131 and the second liquid hole 141 in a fan shape can make the cross-sectional area of ​​the first liquid hole 131 and each second liquid hole 141 larger, thereby improving the filtering efficiency.

[0043] In this embodiment, the first filter element 12 is a filter plate, and the first filter element 12 is arranged tilted up and down. A first liquid outlet is provided at the bottom of the flocculation tank 11 of the integrated wastewater pretreatment device, and the first liquid outlet is arranged at the bottom of the liquid outlet cavity. A cleaning port is provided on one side of the static pressure cavity, and the cleaning port is arranged close to the lower end of the first filter element 12 to facilitate cleaning of impurities remaining on the first filter element 12.

[0044] A preferred embodiment of a wastewater treatment device, such as Figure 7 , Figure 2 , Figure 3As shown, the integrated wastewater pretreatment device mentioned above is included, the bottom of the flocculation tank 11 of the integrated wastewater pretreatment device is provided with a first liquid outlet, and the first liquid outlet is arranged at the bottom of the liquid outlet cavity. The wastewater treatment equipment also includes a fine filtering device, which includes a filter tank 21, a liquid storage tank 22 storing a diatomaceous earth suspension, and a circulating pump 23; a second filter element 24 is provided in the middle of the tank cavity of the filter tank 21, and the second filter element 24 divides the tank cavity into a first cavity 211 located at the upper part and a second cavity 212 located at the lower part, the first liquid outlet is communicated with the first cavity 211, and the bottom of the second cavity 212 is provided with a second liquid outlet; the liquid storage tank 22 is communicated with the first cavity 211 or the second cavity 212; the water inlet of the circulating pump 23 is communicated with the second cavity 212, and the water outlet of the circulating pump 23 is communicated with the first cavity 211, and the circulating pump 23 is used to pump the diatomaceous earth suspension flowing into the second cavity 212 to the first cavity 211.

[0045] Specifically, the fine filtration device of the existing wastewater treatment device usually uses tubular membrane filtration technology to filter high-concentration suspended solids in the wastewater of power transmission and transformation projects. Since suspended solids and other substances accumulate on the membrane surface and in the pores, the membrane is prone to clogging, resulting in a decrease in filtration efficiency and inconvenience in cleaning.

[0046] In this embodiment, a diatomaceous earth suspension is provided in the liquid storage tank 22, and the liquid storage tank 22 is connected to the second cavity 212. Before the fine filtering device starts working, the diatomaceous earth suspension in the liquid storage tank 22 is first added to the second cavity 212, and then the circulation pump 23 is turned on to pump the diatomaceous earth suspension in the second cavity 212 into the first cavity 211. The diatomaceous earth suspension in the first cavity 211 will be dispersed on the second filter element 24, and the diatomaceous earth in the diatomaceous earth suspension will form a filter pre-coat layer 6 with fine pores on the surface of the filter element. The structure of the filter pre-coat layer 6 deposited on the second filter element 24 is as shown in FIG. Figure 4 As shown, the diatomaceous earth suspension flowing into the second cavity 212 is repeatedly pumped into the first cavity 211 by the circulation pump 23, so that the diatomaceous earth in the diatomaceous earth suspension can be accumulated on the upper end of the filter element as much as possible, so that the thickness of the filter pre-coat layer 6 gradually increases; after the circulation pump 23 is closed, the sewage is passed into the first cavity 211, and the solid phase particles in the sewage are mixed with the diatomaceous earth particles and accumulated on the filter element to form a loose filter cake. As time goes by, the filter cake gradually thickens; the structure of the impurities forming the filter cake on the filter pre-coat layer is shown in FIG. Figure 5 As shown, Figure 5 The direction of the arrow in the figure is the flow direction of sewage. Diatomaceous earth can prevent impurities in sewage from entering the filter holes of the second filter element 24. The binding force between diatomaceous earth and the filter holes of the second filter element 24 is relatively small. The filter cake mixed with impurities can be easily removed from the second filter element 24 by backwashing.

[0047] Among them, the mechanism of the filtration precoat 6 composed of diatomaceous earth has three aspects: a. Screening, when the water flows through the filtration precoat 6, all the suspended impurity particles with a particle size larger than the pores of the diatomaceous earth are intercepted. The screening effect often occurs on the surface of the filtration precoat 6. b. Flow blocking, when some relatively thin impurity particles pass through the surface of the filtration precoat 6 and penetrate into the interior of the filtration precoat 6, they are blocked and removed by the tortuous microporous channels inside the filtration precoat 6 and the smaller pores in the filter membrane; c. Adsorption, some particles smaller than the internal pores of the diatomaceous earth itself collide with the internal surface of the diatomaceous earth when passing through the filtration precoat 6 with the water flow, and are attracted by the opposite charge. In addition, the impurity particles are attracted to each other by opposite charges, forming chains and adsorbed on the filtration precoat 6. Therefore, the use of the filtration precoat 6 can effectively remove suspended particles in wastewater.

[0048] Furthermore, in order to facilitate the addition of the diatomaceous earth suspension, in this embodiment, a liquid dosing pump 5 is further provided, the liquid inlet of the liquid dosing pump 5 is connected to the liquid storage tank 22 , and the liquid outlet of the liquid dosing pump 5 is connected to the first cavity 211 or the second cavity 212 .

[0049] In this embodiment, the wastewater treatment equipment further includes a backwash water supply pipe 25, and the liquid outlet end of the backwash water supply pipe 25 is connected to the second cavity 212. Specifically, the backwash pipe passes water to the second cavity 212, and the water in the second cavity 212 flows to the first cavity 211, thereby removing the filter cake deposited on the end of the second filter element 24 facing the first cavity 211. Figure 6 As shown, Figure 6 The arrow direction in is the backwashing water flow direction, and the backwashing water flushes the diatomaceous earth impurity mixture 7 away from the second filter element 24. Correspondingly, the cavity wall of the first cavity 211 is provided with a flushing liquid outflow outlet.

[0050] In this embodiment, the wastewater treatment equipment further includes an air flotation device 3, the liquid inlet end of the air flotation device 3 is connected to the first liquid outlet, and the liquid outlet end of the air flotation device 3 is connected to the first cavity 211. The air flotation device 3 can increase the buoyancy of oil droplets and suspended particles to move to the liquid surface, and achieve the purpose of treating and purifying sewage by repeatedly removing scum impurities, thereby reducing the workload of the fine filtering device.

[0051] In this embodiment, the wastewater treatment equipment further comprises an electrochemical oxidation tank 4, the liquid inlet of the electrochemical oxidation tank 4 is connected to the second liquid outlet. The clean water flowing out of the fine filtration device is transported to the electrochemical oxidation tank 4, and the electrochemical oxidation tank 4 can indiscriminately oxidize and degrade organic pollutants in the clean water.

[0052] In this embodiment, in order to facilitate the rapid arrangement of the wastewater treatment equipment, the flocculation tank 11, the flotation device 3, the fine filtration device and the electrochemical oxidation tank 4 are arranged on the base 8 from front to back, so as to facilitate the rapid arrangement of the wastewater treatment equipment.

[0053] In summary, the integrated wastewater pretreatment device of the present invention comprises a flocculation tank 11, a first filter element 12, a first gate plate 13, a second gate plate 14 and a driving mechanism, wherein the first filter element 12 is arranged at the inner bottom of the flocculation tank 11 and is spaced apart from the bottom wall of the flocculation tank 11, the interval between the first filter element 12 and the bottom wall of the flocculation tank 11 forms a liquid outlet cavity, the first gate plate 13 is arranged in the flocculation tank 11 and is spaced apart from the first filter element 12, a first liquid through hole 131 is provided at an eccentric position of the first gate plate 13, and the second gate plate 14 is horizontally rotatably arranged in the flocculation tank 11 and is spaced apart from the first filter element 12. The second gate plate 14 is fitted up and down, and a second liquid hole 141 is provided at an eccentric position of the second gate plate 14; the interval between the first gate plate 13 and the first filter element 12 forms a static pressure chamber, and the interval between the second gate plate 14 and the tank top of the flocculation tank 11 forms a flocculation chamber. The driving mechanism includes a connecting rod 151, a gear ring 152, a first gear 153 and a rotating driving member 154 arranged outside the flocculation tank 11, the gear ring 152 is arranged close to the top wall of the flocculation tank 11, the lower end of the connecting rod 151 is connected to the edge of the second gate plate 14, and the upper end of the connecting rod 151 is connected to the gear ring 152. , the first gear 153 is meshed with the gear ring 152, and the output end of the rotary driving member 154 is connected to the first gear 153 to drive the first gear 153 to rotate, driving the second gate plate 14 to rotate synchronously with the gear ring 152, so that the second liquid hole 141 and the first liquid hole 131 are completely staggered or the second liquid hole 141 and the first liquid hole 131 are at least partially overlapped; when in use, the second gate plate 14 is first driven by the driving mechanism to rotate, so that the second liquid hole 141 and the first liquid hole 131 are completely staggered, at this time the flocculation chamber and the filtration chamber are isolated, and the pollutants can be filtered in the flocculation chamber. The water is flocculated. After the sewage flocculation is completed, the driving mechanism is used to drive the second gate 14 to rotate so that the second liquid hole 141 and the first liquid hole 131 at least partially overlap. At this time, the static pressure chamber and the flocculation chamber are connected, and the sewage in the flocculation chamber flows into the static pressure chamber and flows evenly through the static pressure chamber on the first filter. The sewage filtered by the first filter element 12 flows into the water outlet chamber; therefore, the integrated wastewater pretreatment device of the present invention realizes flocculation and filtration by using a single flocculation tank 11, which greatly reduces the volume of the integrated wastewater pretreatment device and facilitates the installation and transportation of the integrated wastewater pretreatment device.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An integrated wastewater pre-treatment device, characterized in that: include: Flocculation tank (11); A first filter element (12), the first filter element (12) being arranged at the inner bottom of the flocculation tank (11) and spaced apart from the bottom wall of the flocculation tank (11); a first gate plate (13), the first gate plate (13) being arranged in the flocculation tank (11) and spaced apart from the first filter element (12) in a vertical direction, and a first liquid passage hole (131) being provided at an eccentric position of the first gate plate (13); a second gate plate (14), the second gate plate (14) being horizontally rotatably disposed in the flocculation tank (11) and being in contact with the second gate plate (14) from top to bottom, and a second liquid-passing hole (141) being disposed at an eccentric position of the second gate plate (14); A driving mechanism, the driving mechanism comprising a connecting rod (151), a gear ring (152), a first gear (153) arranged in the flocculation tank (11), and a rotating driving member (154) arranged outside the flocculation tank (11), the gear ring (152) being arranged close to the top wall of the flocculation tank (11), the lower end of the connecting rod (151) being connected to the edge of the second gate plate (14), the upper end of the connecting rod (151) being connected to the gear ring (152), the first gear (153) being meshed with the gear ring (152), and the output end of the rotating driving member (154) being transmission-connected with the first gear (153) to drive the first gear (153) to rotate, thereby driving the second gate plate (14) and the gear ring (152) to rotate synchronously, so that the second liquid passage hole (141) and the first liquid passage hole (131) are completely staggered or the second liquid passage hole (141) and the first liquid passage hole (131) are at least partially overlapped.

2. The integrated wastewater pretreatment device according to claim 1, characterized in that: The integrated wastewater pre-treatment device also includes a first stirring paddle (161) and a first motor (162); the blade portion of the first stirring paddle (161) is arranged in the flocculation tank (11) and is located between the second gate plate (14) and the top wall of the flocculation tank (11); the paddle shaft portion of the first stirring paddle (161) passes through the top wall of the flocculation tank (11) upwards; the first motor (162) is connected to the flocculation tank (11) and is connected to the paddle shaft portion of the first stirring paddle (161).

3. The integrated wastewater pretreatment device according to claim 2, characterized in that: The integrated wastewater pre-treatment device further comprises a second gear (163), a third gear (164) and a second stirring paddle (165); the second stirring paddle (165) is arranged in parallel and spaced apart from the first stirring paddle (161); a blade portion of the second stirring paddle (165) is arranged in the flocculation tank (11) and is located between the second gate plate (14) and the top wall of the flocculation tank (11); a paddle shaft portion of the second stirring paddle (165) passes through the top wall of the flocculation tank (11) upward and is connected to the second gear (163); the third gear (164) is connected to the outer side of the paddle shaft of the first stirring paddle (161); and the second gear (163) is meshed with the third gear (164).

4. The integrated wastewater pretreatment device according to claim 3 is characterized in that: The integrated wastewater pre-treatment device further comprises: a mounting plate (171) and a telescopic drive mechanism, wherein the lower end of the telescopic drive mechanism is connected to the flocculation tank (11), and the upper end of the telescopic drive mechanism is connected to the mounting plate (171); the first motor (162) is fixed on the mounting plate (171); the telescopic drive mechanism drives the mounting plate (171) to move up and down, thereby driving the first stirring paddle (161) and the second stirring paddle (165) to move up and down.

5. The integrated wastewater pre-treatment device according to claim 1, characterized in that: A plurality of the first liquid through holes (131) and the second liquid through holes (141) are provided, and each of the first liquid through holes (131) and the second liquid through holes (141) is arranged at intervals in the axial direction around the flocculation tank (11); By rotating the second gate plate (14), each of the first liquid passage holes (131) and each of the second liquid passage holes (141) can be completely staggered or completely overlapped.

6. The integrated wastewater pre-treatment device according to claim 5, characterized in that: The shape of each of the first liquid-passing holes (131) and each of the second liquid-passing holes (141) is a sector.

7. A wastewater treatment equipment, characterized in that: The integrated wastewater pretreatment device comprises the integrated wastewater pretreatment device according to any one of claims 1 to 6, wherein the bottom of the flocculation tank (11) of the integrated wastewater pretreatment device is provided with a first liquid outlet, and the wastewater treatment equipment further comprises a fine filtration device, wherein the fine filtration device comprises a filtration tank (21), a liquid storage tank (22) storing a diatomaceous earth suspension, and a circulation pump (23); A second filter element (24) is provided in the middle of the tank cavity of the filter tank (21), the second filter element (24) divides the tank cavity into a first cavity (211) located at the upper part and a second cavity (212) located at the lower part, the first liquid outlet is communicated with the first cavity (211), and a second liquid outlet is provided at the bottom of the second cavity (212); The liquid storage tank (22) is in communication with the first cavity (211) or the second cavity (212); The water inlet of the circulation pump (23) is in communication with the second cavity (212), and the water outlet of the circulation pump (23) is in communication with the first cavity (211); the circulation pump (23) is used to pump the diatomaceous earth suspension flowing into the second cavity (212) into the first cavity (211).

8. The wastewater treatment equipment according to claim 7, characterized in that: The wastewater treatment equipment further comprises a backwashing water supply pipe (25), wherein a liquid outlet end of the backwashing water supply pipe (25) is in communication with the second cavity (212).

9. The wastewater treatment equipment according to claim 7, characterized in that: The wastewater treatment equipment further comprises an air flotation device (3), wherein a liquid inlet end of the air flotation device (3) is connected to the first liquid outlet, and a liquid outlet end of the air flotation device (3) is connected to the first cavity (211).

10. The wastewater treatment equipment according to claim 7, characterized in that: The wastewater treatment equipment further comprises an electrochemical oxidation tank (4), the liquid inlet end of the electrochemical oxidation tank (4) being in communication with the second liquid outlet.

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