A flocculation device for sewage treatment

Abstract

The present application provides a flocculation device for sewage treatment, which is used to solve the problems in the prior art of low sewage flocculation and sedimentation efficiency and long self-sedimentation tanks that occupy a large area. It includes a dosing mixing tank, a flocculation sedimentation tank, and a self-sedimentation tank, which are arranged in sequence along the flow direction of sewage; a flocculation agent dosing pipeline is arranged above the water inlet end of the dosing mixing tank; a folding guide assembly is arranged in the flocculation sedimentation tank, and an extrusion assembly is arranged at the lower part of the flocculation sedimentation tank, and the folding guide assembly includes two mutually hinged guide plates; a mud guard assembly is arranged in the self-sedimentation tank, and the mud guard assembly includes a mud guard rotatably installed between the inner walls on both sides of the self-sedimentation tank. The present application improves the flocculation and sedimentation efficiency of flocculants by arranging a folding guide assembly and an extrusion assembly in the flocculation sedimentation tank, and shortens the length of the self-sedimentation tank by arranging a mud guard in the self-sedimentation tank to block the flocculants.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, in particular to a flocculation device for sewage treatment. Background Art

[0002] Flocculation and sedimentation are one of the most important steps in sewage treatment. During this process, flocculants are added to the sewage to cause suspended particles to coagulate and settle. Existing flocculation and sedimentation equipment primarily consists of a flocculant mixing tank, a folded plate flocculation tank, and a self-sedimentation tank. Flocculants are added to the flocculant mixing tank to thoroughly mix the sewage and the chemicals. Several guide plates are installed in the folded plate flocculation tank to increase the flow path and improve flocculation and sedimentation efficiency. Finally, the sewage passes through the slower self-sedimentation tank to fully settle the flocs.

[0003] In the existing sewage flocculation and sedimentation process, there are technical problems such as low sedimentation efficiency of flocs in the folded plate flocculation tank, high water content of the flocs after sedimentation, and low extraction efficiency of the sludge pump. At the same time, since the flocs in the self-sedimentation tank need to rely on self-generated gravity to slowly sink, the length of the self-sedimentation tank is required to be high, and the self-sedimentation tank occupies a large area. Summary of the Invention

[0004] The purpose of the present invention is to provide a flocculation device for sewage treatment, which is used to solve the problems in the prior art of low sewage flocculation and sedimentation efficiency and long sedimentation tanks that occupy a large area.

[0005] A flocculation device for sewage treatment, comprising a dosing mixing tank, a flocculation sedimentation tank and a self-sedimentation tank arranged in sequence along the flow direction of sewage;

[0006] A flocculant dosing pipeline is provided above the water inlet of the dosing mixing tank, a stirring assembly for mixing the flocculant with sewage is provided in the dosing mixing tank, and a water outlet of the dosing mixing tank is located above the water inlet of the flocculation sedimentation tank;

[0007] A folding guide assembly is provided in the flocculation sedimentation tank, and a squeezing assembly is provided at the lower part of the flocculation sedimentation tank. The squeezing assembly can reciprocate at the bottom of the flocculation sedimentation tank along the flow direction of the sewage. The folding guide assembly includes two mutually hinged guide plates. When the two guide plates are folded, they guide the flow direction of the sewage. When the two guide plates are unfolded, they cooperate with the squeezing assembly to squeeze the floccules to the two ends of the lower part of the flocculation sedimentation tank.

[0008] The water outlet end of the flocculation sedimentation tank is located above the water inlet end of the self-sedimentation tank. A mud guard assembly is provided in the self-sedimentation tank. The mud guard assembly includes a mud guard rotatably installed between the inner walls on both sides of the self-sedimentation tank. The angle of the mud guard can be adjusted in real time according to the water inlet amount of the self-sedimentation tank.

[0009] Preferably, the stirring assembly includes a first mounting frame arranged across the top of the dosing mixing tank, and a stirring motor mounted on the first mounting frame, wherein the power output shaft of the stirring motor is connected to the stirring shaft, and the axis of the stirring shaft is perpendicular to the bottom end surface of the dosing mixing tank;

[0010] The stirring shaft is provided with a plurality of stirring blades, and the stirring blades located at the bottom end of the stirring shaft are all installed with scrapers, and the bottom ends of the scrapers are in contact with the bottom end of the dosing mixing tank.

[0011] Preferably, the folding guide assembly further comprises a first rotating shaft, the bottom ends of the two guide plates are rotatably mounted on the first rotating shaft, and first sliders are mounted on both ends of the first rotating shaft;

[0012] The inner walls on both sides of the flocculation sedimentation tank are both installed with first slide grooves arranged in the vertical direction, and the two first sliders slide along the first slide grooves on both sides respectively. The inner walls on both sides of the flocculation sedimentation tank are both provided with driving modules for driving the two guide plates to fold or unfold.

[0013] Preferably, the driving module comprises a bidirectional screw mounted on the inner side wall of the flocculation sedimentation tank, and the bidirectional screw is arranged along the length direction of the flocculation sedimentation tank;

[0014] The bidirectional threads of the bidirectional screw are threadedly connected to a second slider, one side wall of the second slider is in contact with the inner wall of the flocculation sedimentation tank, and the other side wall of the second slider is rotatably installed with a second rotating shaft, and the front ends of the two second rotating shafts are respectively fixed on the connecting blocks at the bottom ends of the two guide plates.

[0015] Preferably, both ends of the flocculation sedimentation tank are equipped with a material receiving box connected to the inner cavity thereof, and the two inner side walls and the inner bottom surface of the material receiving box are flush with the two inner side walls and the inner bottom surface of the flocculation sedimentation tank respectively;

[0016] The extrusion assembly includes an extrusion plate that slides along the bottom surface of the flocculation sedimentation tank and the material receiving box. The width and height of the extrusion plate are the same as the width and height of the inner cavity of the material receiving box. A one-way screw is also installed between the outer walls at both ends of the two material receiving boxes. The extrusion plate is threadedly connected to the one-way screw.

[0017] Preferably, when the two guide plates are unfolded, the included angle W between the two guide plates is an obtuse angle, and the guide plates are located above the extrusion plates;

[0018] A plurality of water holes are provided on the two guide plates and the extrusion plate, and the water holes on the two guide plates are staggered.

[0019] Preferably, the number of the fenders is N, N≥2, the upper ends of the fenders are fixed on the third rotating shaft, and the two ends of the third rotating shaft are rotatably mounted on the two side walls of the self-sedimentation tank respectively;

[0020] The mud guard assembly also includes gears installed at both ends of the third rotating shaft, and second chutes installed on the side walls of both sides of the self-sedimentation tank, each of the second chutes is slidably provided with a bar slider, and the bar slider is equipped with N racks for respectively driving the N gears on the same side to rotate;

[0021] A second mounting frame is provided across the self-precipitation tank, and two electric cylinders are installed on the second mounting frame for respectively driving the two strip-shaped sliders to slide, and the telescopic ends of the electric cylinders are connected to the top ends of the strip-shaped sliders;

[0022] A vertical baffle is also installed between the two side walls of the self-sedimentation tank. The vertical baffle is located on the side of the third rotating shaft close to the water outlet end of the self-sedimentation tank. The bottom end of the vertical baffle is connected to the bottom end of the self-sedimentation tank, and the top surface of the vertical baffle is flush with the horizontal plane where the axis of the third rotating shaft at the bottom is located.

[0023] Preferably, a flow sensor is further installed on the water inlet pipe of the self-sedimentation tank, and the specific method for adjusting the fender in real time according to the water inlet volume Q detected by the flow sensor is:

[0024] S1: The water inflow Q from the sedimentation tank is collected by the flow sensor;

[0025] S2: Determine Q t -Q t-1 ≥△Q is true, where: Q t is the water inflow at the current sampling time t, Q t-1 is the water inflow at the last sampling moment t-1, △Q is the flow regulation threshold;

[0026] If it is not established, no adjustment is made and flow monitoring continues through the flow sensor;

[0027] If so, go to step S2 to adjust the flow rate;

[0028] S3: Construct the relationship between the sewage flow rate and the angle between the fenders:

[0029]

[0030] Where Q i is the water inflow at the i-th moment, B is the inner width of the self-sedimentation tank, G is the distance between two adjacent fenders when they are both on the horizontal plane, N is the number of fenders, α i is the angle between the fender and the horizontal plane, S i The fender rotation angle is αi Flow rate at time;

[0031] S4: Will Q t Substitute into the equation in step S3 and calculate S t =S max When α t , and Adjust the angle between the fender and the horizontal plane at time t, where: S max is the preset flow rate threshold.

[0032] Preferably, the water outlet end of the self-sedimentation tank is provided with a serrated water outlet, and a water collecting trough is installed on the side wall of the self-sedimentation tank on one side of the serrated water outlet;

[0033] The lower end of the water collecting tank is connected to a plurality of drainage pipes, and the drainage pipes are communicated with the external drainage network.

[0034] Preferably, the bottom side walls of the material receiving box and the self-sedimentation tank are both provided with sewage pipes communicating with their inner cavities, and the outlets of the sewage pipes are both communicated with an external sludge pump.

[0035] Due to the adoption of the above technical solution, the present invention has the following advantages:

[0036] 1. The present application provides a folding guide assembly and an extrusion assembly in a flocculation sedimentation tank. When the two guide plates of the folding guide assembly are folded, they guide the flow direction of the sewage, thereby extending the path of the sewage in the flocculation sedimentation tank. At the same time, the water flows through the bottom end of the flocculation sedimentation tank, thereby improving the sedimentation efficiency of the flocs. When the two guide plates are unfolded, they cooperate with the extrusion assembly to squeeze the flocs to the two ends of the lower part of the flocculation sedimentation tank, thereby facilitating the extraction of the flocs. At the same time, the water content in the flocs is reduced during the extrusion process, thereby reducing the time for floc processing in subsequent steps.

[0037] 2. This application improves the sedimentation efficiency of flocs, shortens the length of the self-sedimentation tank, and saves its floor space by setting a mudguard in the self-sedimentation tank to block flocs. At the same time, by monitoring the water inflow of the self-sedimentation tank, the angle of the mudguard is adjusted in real time. By adjusting the sewage flow rate, it is ensured that the sewage flow will not carry away the flocs, and the mudguard can block the flocs at the maximum mud blocking angle.

[0038] 3. This application sets a stirring component in the dosing mixing tank so that the flocculating agent and the sewage can be fully mixed. At the same time, a scraper is set on the stirring blade at the bottom to effectively reduce the initial small particle flocculants from settling and adhering to the bottom of the dosing mixing tank.

[0039] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings of the present invention are described below.

[0041] Figure 1 It is a structural schematic diagram of the flocculation equipment of the present invention.

[0042] Figure 2 Schematic diagram of the structure of the stirring assembly of the present invention.

[0043] Figure 3 It is a half-section view of the flocculation sedimentation tank of the present invention.

[0044] Figure 4 It is a structural schematic diagram of the foldable guide assembly of the present invention.

[0045] Figure 5 For the present invention Figure 4 A partial enlarged view of point A in the middle.

[0046] Figure 6 It is a structural schematic diagram of the self-sedimentation tank and mud retaining assembly of the present invention.

[0047] Figure 7 Schematic diagram of the structure of the mud guard assembly of the present invention.

[0048] In the figure: 101-dosing mixing tank; 102-dosing pipeline; 103-first mounting frame; 104-stirring motor; 105-stirring shaft; 106-stirring blade; 107-scraper; 108-angle steel support frame;

[0049] 201 - Flocculation sedimentation tank; 202 - guide plate; 203 - first rotating shaft; 204 - first slider; 205 - first chute; 206 - bidirectional screw; 207 - second slider; 208 - second rotating shaft; 209 - connecting block; 210 - material receiving box; 211 - extrusion plate; 212 - unidirectional screw; 213 - water hole;

[0050] 301-Self-sedimentation tank; 302-Fender; 303-Third rotating shaft; 304-Gear; 305-Second chute; 306-Strip slider; 307-Rack; 308-Second mounting bracket; 309-Electric cylinder; 310-Vertical baffle; 311-Serrated water outlet; 312-Water collecting trough; 313-Drain pipe; 314-Sewage pipe; 315-Flow sensor. DETAILED DESCRIPTION

[0051] The present invention will be further described below with reference to the accompanying drawings and examples.

[0052] Example 1:

[0053] like Figures 1 to 7 The flocculation equipment shown is used for sewage treatment, comprising a dosing mixing tank 101, a flocculation sedimentation tank 201 and a self-sedimentation tank 301 arranged in sequence along the flow direction of the sewage;

[0054] A flocculant dosing pipeline 102 is provided above the water inlet of the dosing mixing tank 101. A stirring assembly for mixing the flocculant with the sewage is provided in the dosing mixing tank 101. The water outlet of the dosing mixing tank 101 is located above the water inlet of the flocculation sedimentation tank 201.

[0055] A folding guide assembly is provided in the flocculation sedimentation tank 201. A squeezing assembly is provided at the lower portion of the flocculation sedimentation tank 201. The squeezing assembly can reciprocate at the bottom of the flocculation sedimentation tank 201 along the flow direction of the sewage. The folding guide assembly includes two mutually hinged guide plates 202. When the two guide plates 202 are folded, they guide the flow direction of the sewage. When the two guide plates 202 are unfolded, they cooperate with the squeezing assembly to squeeze the floccules to the two ends of the lower portion of the flocculation sedimentation tank 201.

[0056] The outlet end of the flocculation sedimentation tank 201 is located above the water inlet end of the self-sedimentation tank 301. A mud guard assembly is provided in the self-sedimentation tank 301. The mud guard assembly includes a mud guard 302 rotatably installed between the inner walls on both sides of the self-sedimentation tank 301. The angle of the mud guard 302 can be adjusted in real time according to the water inlet amount of the self-sedimentation tank 301.

[0057] In this embodiment, by folding the guide assembly and the extrusion assembly in the flocculation sedimentation tank 201, the two guide plates 202 of the folded guide assembly guide the flow direction of the sewage, thereby extending the path of the sewage in the flocculation sedimentation tank. At the same time, the water flows through the bottom end of the flocculation sedimentation tank, thereby improving the sedimentation efficiency of the flocs. The two guide plates 202 cooperate with the reciprocating extrusion assembly to squeeze the flocs to the two ends of the lower part of the flocculation sedimentation tank, which is convenient for the sludge pump to extract the flocs. At the same time, the water content in the flocs is also reduced during the extrusion process, thereby reducing the time for floc processing in subsequent steps.

[0058] In this embodiment, by providing a fender 302 in the self-sedimentation tank 301 to block the flocculants, the settling efficiency of the flocculants is improved, the length of the self-sedimentation tank 301 is shortened, and the floor space thereof is saved.

[0059] like Figure 1 and Figure 2As shown, the stirring assembly includes a first mounting frame 103 arranged across the top of the dosing mixing tank 101, and a stirring motor 104 mounted on the first mounting frame 103, the power output shaft of the stirring motor 104 is connected to the stirring shaft 105, and the axis of the stirring shaft 105 is perpendicular to the bottom end surface of the dosing mixing tank 101;

[0060] The stirring shaft 105 is provided with a plurality of stirring blades 106 . The stirring blades 106 at the bottom end of the stirring shaft 105 are all installed with scrapers 107 . The bottom ends of the scrapers 107 are in contact with the bottom end of the dosing mixing tank 101 .

[0061] In this embodiment, the dosing mixing tank 101 is installed above the water inlet end of the flocculation sedimentation tank 201 through an angle steel support frame 108, the dosing pipeline 102 is connected to the dosing pump, and the flocculating agent is a mixture of polyacrylamide and polymerized alumina; by arranging a scraper 107 on the stirring blade 106 at the bottom end, the initial small particle flocculants are effectively reduced from settling and adhering to the bottom of the dosing mixing tank 101, thereby reducing the cleaning frequency of the dosing mixing tank 101.

[0062] like Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, the folding guide assembly further includes a first rotating shaft 203, the bottom ends of the two guide plates 202 are rotatably mounted on the first rotating shaft 203, and first sliders 204 are installed at both ends of the first rotating shaft 203;

[0063] The inner walls on both sides of the flocculation sedimentation tank 201 are both installed with first slide grooves 205 arranged in the vertical direction, and the two first sliders 204 slide along the first slide grooves 205 on both sides respectively. The inner walls on both sides of the flocculation sedimentation tank 201 are both provided with driving modules for driving the two guide plates 202 to fold or unfold.

[0064] like Figure 1 、 Figure 2 and Figure 3 As shown, the driving module includes a bidirectional screw 206 installed on the inner wall of the flocculation sedimentation tank 201, and the bidirectional screw 206 is arranged along the length direction of the flocculation sedimentation tank 201;

[0065] The bidirectional threads of the bidirectional screw 206 are both threadedly connected with a second slider 207, one side wall of the second slider 207 is in contact with the inner wall of the flocculation sedimentation tank 201, and the other side wall of the second slider 207 is rotatably installed with a second rotating shaft 208, and the front ends of the two second rotating shafts 208 are respectively fixed on the connecting blocks 209 at the bottom ends of the two guide plates 202.

[0066] In this embodiment, when the second sliders 207 on the same bidirectional screw 206 are in contact with each other, the two guide plates 202 are both in a vertical position. At this time, there is a 2 mm gap between the two guide plates 202 (not fitted).

[0067] In this embodiment, one end of the rotating shaft of the bidirectional screw 206 passes through the outside of the flocculation sedimentation tank 201 and is connected to the driving motor. The bidirectional screw 206 and the flocculation sedimentation tank 201 are sealed by an oil seal.

[0068] like Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, both ends of the flocculation sedimentation tank 201 are installed with a material receiving box 210 connected to its inner cavity, and the two inner side walls and inner bottom surfaces of the material receiving box 210 are flush with the two inner side walls and inner bottom surfaces of the flocculation sedimentation tank 201 respectively;

[0069] The extrusion assembly includes an extrusion plate 211 that slides along the inner bottom surface of the flocculation sedimentation tank 201 and the material receiving box 210. The width and height of the extrusion plate 211 are the same as the width and height of the inner cavity of the material receiving box 210. A one-way screw 212 is also installed between the outer walls at both ends of the two material receiving boxes 210. The extrusion plate 211 is threadedly connected to the one-way screw 212.

[0070] like Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, when the two guide plates 202 are unfolded, the included angle W between the two guide plates 202 is an obtuse angle, and the guide plates 202 are located above the extrusion plate 211;

[0071] A plurality of water holes 213 are provided on both the two guide plates 202 and the extrusion plate 211 , and the water holes 213 on the two guide plates 202 are staggered.

[0072] In this embodiment, by staggering the water holes 213 on the two guide plates 202, when the two guide plates 202 are in a vertical position, it is difficult for water to pass through the guide plates 202 through the water holes 213, thereby ensuring that the water flow can pass through the bottom of the flocculation sedimentation tank 201, thereby improving the efficiency of flocculation sedimentation; at the same time, when the guide plates 202 are unfolded for squeezing, the water flow can be squeezed out from the water holes 214.

[0073] In this embodiment, the angle W between the two guide plates 202 is 176°. When the two guide plates 202 are unfolded to 176°, the lowest end and the top end of the extrusion plate 211 are located on the same horizontal plane, which ensures that the two-way screw 206 will not self-lock when driving the two guide plates 202 to fold in reverse, and at the same time minimizes the gap between the two guide plates 202 and the extrusion plate 211.

[0074] In this embodiment, at the initial moment, the two guide plates 202 are in a folded state, and the squeezing plate 211 is located in the receiving box 210 on one side; after a predetermined time, the two guide plates 202 are unfolded, and after the guide plates 202 are unfolded, the squeezing plate 211 moves to the receiving box 210 on the other side. The two guide plates 202 are in a folded state, and the sludge pump is started to extract the flocculants in the receiving box 210 on the other side; the above steps are repeated, and the flocculants are periodically pushed into the receiving boxes 210 on both sides for extraction through the reciprocating motion of the squeezing plate 211.

[0075] like Figure 1 、 Figure 6 and Figure 7 As shown, the number of the fenders 302 is N, N ≥ 2, the upper ends of the fenders 302 are fixed on the third rotating shaft 303, and the two ends of the third rotating shaft 303 are rotatably mounted on the two side walls of the self-sedimentation tank 301;

[0076] The mud guard assembly further includes gears 304 mounted on both ends of the third rotating shaft 303, and second chutes 305 mounted on the sidewalls of both sides of the self-sedimentation tank 301. The second chutes 305 are each slidably provided with a bar-shaped slider 306, and the bar-shaped slider 306 is mounted with N racks 307 for respectively driving the N gears 304 on the same side to rotate.

[0077] A second mounting frame 308 is provided across the self-precipitation tank 301. Two electric cylinders 309 are installed on the second mounting frame 308 for driving the two strip-shaped sliders 306 to slide. The telescopic ends of the electric cylinders 309 are connected to the top ends of the strip-shaped sliders 306.

[0078] A vertical baffle 310 is also installed between the two side walls of the self-sedimentation tank 301. The vertical baffle 310 is located on the side of the third rotating shaft 303 close to the water outlet end of the self-sedimentation tank 301. The bottom end of the vertical baffle 310 is connected to the bottom end of the self-sedimentation tank 301, and the top surface of the vertical baffle 310 is flush with the horizontal plane where the axis of the third rotating shaft 303 at the bottom is located.

[0079] In this embodiment, there are two mudguards 302. By setting a vertical baffle 310, water can only flow out from the water trough between the two mudguards 302. When the angle between the mudguard 302 and the horizontal plane is larger, the mudguard 302 has a better blocking effect on the flocs. At the same time, the larger the angle between the mudguard 302 and the horizontal plane, the smaller the width of the water trough between the mudguards 302, and the faster the water flow speed. Therefore, it is necessary to adjust the angle of the mudguard 302 according to the water inlet of the sedimentation tank 301, and ensure the blocking effect while preventing the flocs from moving forward with the water flow.

[0080] In this embodiment, when the angle of the fender 302 is adjusted, the electric cylinder 309 drives the strip slider 306 and the rack 307 to move up and down, and the rack 307 engages with the gear 304 to drive the fender 302 to rotate.

[0081] like Figure 1 、 Figure 6 and Figure 7 As shown, a flow sensor 315 is also installed on the water inlet pipe of the self-sedimentation tank 301. The specific method for the fender 302 to adjust in real time according to the water inlet volume Q detected by the flow sensor 315 is as follows:

[0082] S1: The water inflow Q from the sedimentation tank 301 is collected through the flow sensor 315;

[0083] S2: Determine Q t -Q t-1 ≥△Q is true, where: Q t is the water inflow at the current sampling time t, Q t-1 is the water inflow at the last sampling moment t-1, △Q is the flow regulation threshold;

[0084] If not, no adjustment is performed and flow monitoring continues through the flow sensor 315;

[0085] If so, go to step S2 to adjust the flow rate;

[0086] S3: Construct the relationship between the sewage flow rate and the angle between the fenders 302:

[0087]

[0088] Where Q i is the water inflow at the i-th moment, B is the inner width of the sedimentation tank 301, G is the distance between two adjacent fenders 302 when both are located on the horizontal plane, N is the number of fenders 302, α i is the angle between the fender 302 and the horizontal plane, S i The fender 302 rotates at an angle α i Flow rate at time;

[0089] S4: Will Q t Substitute into the equation in step S3 and calculate S t =S max When α t , and The angle between the fender 302 and the horizontal plane at time t is adjusted, where: S max is the preset flow rate threshold.

[0090] In this embodiment, S max The velocity threshold at which floccules do not flow with the water flow is preset based on experience; by adjusting the water flow velocity, it is ensured that most floccules do not flow with the water flow, and the mud guard 302 plays a mud-blocking effect to the maximum extent.

[0091] like Figure 1 and Figure 6 As shown, the outlet end of the self-sedimentation tank 301 is provided with a serrated outlet 311, and a water collecting trough 312 is installed on the side wall of the self-sedimentation tank 301 on one side of the serrated outlet 311;

[0092] The lower end of the water collecting tank is connected to a plurality of drainage pipes 313, and the drainage pipes 313 are communicated with the external drainage network.

[0093] In this embodiment, the water after flocculation and sedimentation is discharged through the drain pipe 313 .

[0094] like Figure 1 and Figure 3 As shown, the bottom sidewalls of the receiving box 210 and the self-sedimentation tank 301 are both provided with sewage pipes 314 communicating with their inner cavities, and the outlets of the sewage pipes 314 are both communicated with an external sludge pump.

[0095] In this embodiment, the sludge in the material receiving box 210 and the sedimentation tank 301 is discharged by a sludge pump.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A flocculation device for sewage treatment, characterized in that: It includes a dosing mixing tank (101), a flocculation sedimentation tank (201) and a self-sedimentation tank (301) which are sequentially arranged along the flow direction of sewage; A flocculant dosing pipeline (102) is provided above the water inlet of the dosing mixing tank (101), a stirring assembly for mixing the flocculant with sewage is provided in the dosing mixing tank (101), and a water outlet of the dosing mixing tank (101) is located above the water inlet of the flocculation sedimentation tank (201); A folding guide assembly is provided in the flocculation sedimentation tank (201), and an extrusion assembly is provided at the lower portion of the flocculation sedimentation tank (201). The extrusion assembly can reciprocate along the sewage flow direction at the bottom of the flocculation sedimentation tank (201). The folding guide assembly includes two mutually hinged guide plates (202). When the two guide plates (202) are folded, they guide the sewage flow direction. When the two guide plates (202) are unfolded, they cooperate with the extrusion assembly to squeeze flocs to both ends of the lower portion of the flocculation sedimentation tank (201); The water outlet of the flocculation sedimentation tank (201) is located above the water inlet of the self-sedimentation tank (301). A mud guard assembly is provided in the self-sedimentation tank (301). The mud guard assembly includes a mud guard (302) rotatably mounted between the inner walls of both sides of the self-sedimentation tank (301). The angle of the mud guard (302) can be adjusted in real time according to the water inflow of the self-sedimentation tank (301). The folding guide assembly further comprises a first rotating shaft (203), the bottom ends of the two guide plates (202) are both rotatably mounted on the first rotating shaft (203), and first sliders (204) are mounted on both ends of the first rotating shaft (203); First chutes (205) arranged in a vertical direction are installed on both inner walls of the flocculation sedimentation tank (201), and the two first sliders (204) slide along the first chutes (205) on both sides respectively. A driving module for driving the two guide plates (202) to fold or unfold is provided on both inner walls of the flocculation sedimentation tank (201); Both ends of the flocculation sedimentation tank (201) are equipped with a material receiving box (210) connected to the inner cavity thereof, and the two inner side walls and the inner bottom surface of the material receiving box (210) are respectively flush with the two inner side walls and the inner bottom surface of the flocculation sedimentation tank (201); The extrusion assembly comprises an extrusion plate (211) that slides along the inner bottom surfaces of the flocculation sedimentation tank (201) and the material receiving box (210), the width and height of the extrusion plate (211) being the same as the width and height of the inner cavity of the material receiving box (210), and a one-way screw (212) is installed between the outer side walls at both ends of the two material receiving boxes (210), and the extrusion plate (211) is threadedly connected to the one-way screw (212); When the two guide plates (202) are unfolded, the included angle W between the two guide plates (202) is an obtuse angle, and the guide plates (202) are located above the extrusion plates (211); A plurality of water holes (213) are provided on both the two guide plates (202) and the extrusion plate (211), and the water holes (213) on the two guide plates (202) are staggered.

2. A flocculation device for sewage treatment according to claim 1, characterized in that: The stirring assembly comprises a first mounting frame (103) arranged across the top of the dosing mixing tank (101), and a stirring motor (104) mounted on the first mounting frame (103), a power output shaft of the stirring motor (104) being connected to a stirring shaft (105), and an axis of the stirring shaft (105) being perpendicular to the bottom end surface of the dosing mixing tank (101); The stirring shaft (105) is provided with a plurality of stirring blades (106), and the stirring blades (106) at the bottom end of the stirring shaft (105) are each provided with a scraper (107), and the bottom end of the scraper (107) contacts the bottom end of the dosing mixing tank (101).

3. The flocculation equipment for sewage treatment according to claim 1, characterized in that: The driving module comprises a bidirectional screw (206) mounted on the inner side wall of the flocculation sedimentation tank (201), and the bidirectional screw (206) is arranged along the length direction of the flocculation sedimentation tank (201); The bidirectional threads of the bidirectional screw (206) are both threadedly connected to a second slider (207), one side wall of the second slider (207) contacts the inner wall of the flocculation sedimentation tank (201), and the other side wall of the second slider (207) is rotatably mounted with a second rotating shaft (208), and the front ends of the two second rotating shafts (208) are respectively fixed to the connecting blocks (209) at the bottom ends of the two guide plates (202).

4. The flocculation equipment for sewage treatment according to claim 1, characterized in that: The number of the fenders (302) is , The upper ends of the fenders (302) are fixed on the third rotating shaft (303), and the two ends of the third rotating shaft (303) are rotatably mounted on the two side walls of the self-sedimentation tank (301); The mud guard assembly further includes gears (304) mounted on both ends of the third rotating shaft (303), and second chutes (305) mounted on the side walls of both sides of the self-precipitation tank (301), wherein the second chutes (305) are slidably provided with strip sliders (306), and the strip sliders (306) are provided with Used to drive the same side separately A rack (307) rotated by a gear (304); A second mounting frame (308) is disposed across the self-precipitation tank (301), and two electric cylinders (309) are mounted on the second mounting frame (308) for respectively driving the two strip-shaped sliders (306) to slide, and the telescopic ends of the electric cylinders (309) are connected to the top ends of the strip-shaped sliders (306); A vertical baffle (310) is further installed between the two side walls of the self-sedimentation tank (301). The vertical baffle (310) is located on the side of the third rotating shaft (303) close to the water outlet of the self-sedimentation tank (301). The bottom end of the vertical baffle (310) is connected to the bottom end of the self-sedimentation tank (301), and the top end surface of the vertical baffle (310) is flush with the horizontal plane where the axis of the third rotating shaft (303) at the bottom is located.

5. The flocculation equipment for sewage treatment according to claim 4, characterized in that: A flow sensor (315) is also installed on the water inlet pipe of the self-precipitation tank (301), and the fender (302) is adjusted according to the water inlet volume detected by the flow sensor (315). The specific method for real-time adjustment is: S1: The amount of water inflow from the sedimentation tank (301) collected by the flow sensor (315) ; S2: Judgment Is it established? Where: For the current sample The amount of water inflow at any moment, For the previous sample The water intake at any time, is the flow regulation threshold; If not, no adjustment is performed and flow monitoring is continued through the flow sensor (315); If so, go to step S2 to adjust the flow rate; S3: Construct the relationship between the sewage flow rate and the angle between the fenders (302): ； Where, For the The water intake at a given moment, is the inner width of the self-sedimentation tank (301), is the distance between two adjacent fenders (302) when both are located on a horizontal plane, is the number of fenders (302), is the angle between the fender (302) and the horizontal plane, The fender (302) is rotated at an angle of Flow rate at time; S4: Substitute into the equation in step S3 and calculate hour, , and As The angle between the fender (302) and the horizontal plane is adjusted at all times, wherein: is the preset flow rate threshold.

6. The flocculation equipment for sewage treatment according to claim 1, characterized in that: The water outlet of the self-sedimentation tank (301) is provided with a sawtooth-shaped water outlet (311), and a water collecting trough (312) is installed on the side wall of the self-sedimentation tank (301) on one side of the sawtooth-shaped water outlet (311); The lower end of the water collecting tank is connected to a plurality of drainage pipes (313), and the drainage pipes (313) are in communication with an external drainage network.

7. The flocculation equipment for sewage treatment according to claim 1, characterized in that: The bottom side walls of the material receiving box (210) and the self-precipitation tank (301) are both provided with sewage pipes (314) communicating with their inner cavities, and the outlets of the sewage pipes (314) are both communicated with an external sludge pump.

Images