Wastewater treatment equipment

Abstract

The utility model discloses wastewater treatment equipment which comprises an air floatation unit, a scum collecting area for temporarily storing scum is arranged in the air floatation unit, and a scraper for conveying the scum on the liquid level of wastewater into the scum collecting area is arranged at the top of the air floatation unit. A filtering mechanism for filtering scum is arranged in the scum collecting area. According to the utility model, the filter mechanism is arranged in the scum collecting area, so that scum pushed into the scum collecting area by the scraper can be filtered by the filter plate after entering the scum collecting area, and the filtered filter residue with low water content is conveyed to the solid-liquid separation equipment through the filter residue suction pipe for solid-liquid separation treatment; the filtered liquid can be sucked and refluxed into the air floatation unit, the purpose of improving the solid-liquid separation treatment efficiency is achieved, meanwhile, due to the arrangement of the dredging assembly, the filter plate can be prevented from being blocked in the long-time use process, and the filtering stability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment technical field especially relates to a wastewater treatment equipment. BACKGROUND

[0002] The statements herein merely provide background information related to the utility model and do not necessarily constitute the prior art.

[0003] Paper industry production is divided into two main process stages, namely pulping and papermaking. Pulping is to separate the fiber in the plant raw material, make pulp, and then bleach. Papermaking is to dilute, shape, press, dry, and make paper from the pulp. Both processes consume a large amount of water, most of which is discharged as wastewater.

[0004] In order to reduce the pollution of wastewater to the environment, the wastewater needs to be treated by multi-stage filtration before being discharged. In the pretreatment process of papermaking wastewater, air floaters are generally used to remove suspended solids and part of dissolved organic matter, so that the pollutants form scum and float on the water surface. After collection, further treatment is carried out by pressure filter or other solid-liquid separation equipment. However, due to the high water content in the scum, directly conveying the scum to the solid-liquid separation equipment will reduce the processing efficiency of the solid-liquid separation equipment and increase the wastewater treatment cost. UTILITY MODEL CONTENTS

[0005] The purpose of the utility model is to solve the above problems, and provide a wastewater treatment equipment, which can filter and separate the scum during collection, and improve the subsequent processing efficiency.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme: a wastewater treatment equipment, comprising an air flotation unit, a scum collection area for temporarily storing scum is arranged in the air flotation unit, a scraper machine is arranged at the top of the air flotation unit for conveying the scum on the liquid surface of the wastewater to the scum collection area, and a filter mechanism for filtering the scum is arranged in the scum collection area.

[0007] The filter mechanism comprises a filter plate arranged in the scum collection area and a scum suction pipe located at the top of the filter plate, and further comprises a dredging assembly for dredging the filter plate when the filter plate is blocked.

[0008] Further, the filter plate is a V-shaped plate, and the filter plate abuts against the side wall of the scum collection area, so as to divide the scum collection area into a residue area and a residual liquid area. The residue area is located at the top of the filter plate, and the residual liquid area is located at the bottom of the filter plate. A liquid discharge pipe is arranged on the air flotation unit and communicates with the residual liquid area.

[0009] Further, the dredging assembly comprises a plurality of supports arranged in the residual liquid area, and a plurality of top pins corresponding to the filter holes of the filter plate are arranged at the top of the supports.

[0010] The dredging assembly further comprises two inner sleeves arranged on the top of the air flotation machine group, outer sleeves capable of moving up and down are arranged on the top of the inner sleeves, compression springs are arranged between the outer sleeves and the air flotation machine group and are sleeved with the inner sleeves, a connecting rod is arranged between the two outer sleeves, a plurality of pull ropes are arranged between the connecting rod and the filter plate, and the top pin is located at the bottom of the filter plate when the compression spring is in a natural state.

[0011] Further, the filter residue suction pipe comprises a main pipe and a plurality of branch pipes, one end of the main pipe is located outside the air flotation machine group and is connected with the conveying pump, one end of the branch pipe is connected with the top of the filter plate, and the other end of the branch pipe is inserted into the main pipe.

[0012] The branch pipe comprises a tubular section and an annular stop section, the outer diameter of the annular stop section is greater than that of the tubular section, the annular stop section is arranged at the end of the tubular section located in the main pipe, and a plurality of feeding holes for the residues on the top of the filter plate to enter are formed in the tubular section.

[0013] Further, a monitoring mechanism for monitoring the displacement of the filter plate is arranged on the air flotation machine group, the monitoring mechanism comprises a photoelectric sensor arranged on the top of the air flotation machine group and a baffle arranged on the outer sleeve, the baffle is located outside the detection area of the photoelectric sensor when the compression spring is in a natural state, and the baffle is located in the detection area of the photoelectric sensor when the top pin is inserted into the filter hole.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model discloses a filter mechanism is arranged in the floating residue collection area, so that the floating residue pushed to the floating residue collection area by the scraper machine will pass through the filter plate after entering the floating residue collection area, the filter residue with low water content is conveyed to the solid-liquid separation equipment through the filter residue suction pipe and is subjected to solid-liquid separation treatment, and the filtered liquid can be sucked back to the air flotation machine group, so that the solid-liquid separation treatment efficiency is improved, and the filter plate can be prevented from being blocked in the long-term use process due to the arrangement of the dredging assembly, and the filtering stability is high. ACCOUT OF DRAWINGS

[0016] Figure 1 It is the perspective view of the utility model;

[0017] Figure 2 It is the perspective view of the utility model; Figure 1 It is the enlarged schematic view of A shown in the figure;

[0018] Figure 3 It is the position schematic view of the filter mechanism of the utility model in the floating residue collection area;

[0019] Figure 4 It is the perspective view of the filter mechanism of the utility model.

[0020] In the figure:

[0021] 1, air floatation unit; 2, scraper machine; 3, filtering mechanism; 31, filter plate; 32, filter residue suction pipe; 321, main pipe; 322, branch pipe; 33, dredging assembly; 331, bracket; 332, thimble; 333, inner sleeve; 334, outer sleeve; 335, compression spring; 336, connecting rod; 337, pull rope; 4, floating residue collection area; 5, monitoring mechanism; 51, photoelectric sensor; 52, baffle. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] Please refer to Figures 1-4 The utility model discloses a wastewater treatment equipment, including air floatation unit 1, air floatation unit 1 is provided with the floating residue collection area 4 for the floating residue temporary storage in, air floatation unit 1 top is provided with the scraper machine 2 for the wastewater liquid level floating residue to the floating residue collection area 4 in transport, the floating residue collection area 4 is provided with the filtering mechanism 3 for to the floating residue filtration in,

[0024] The filtering mechanism 3 includes a filter plate 31 disposed in the floating residue collection area 4 and a filter residue suction pipe 32 located on the top of the filter plate 31. The filtering mechanism 3 further includes a dredging assembly 33 for dredging the filter plate 31 when the filter plate 31 is blocked.

[0025] The utility model discloses a filtering mechanism 3 is arranged in the floating residue collection area 4, makes the floating residue that is pushed to the floating residue collection area 4 through the scraper machine 2 after entering the floating residue collection area 4, all will pass through the filter plate 31 filtration, and the filter residue with low water content is filtered out and is transported to the solid-liquid separation equipment through the filter residue suction pipe 32 to carry out solid-liquid separation treatment, and the filtered liquid can be sucked back to the air floatation unit 1, reach the purpose that improves solid-liquid separation treatment efficiency, and because the setting of dredging assembly 33, can avoid the filter plate 31 to be blocked in the long time use process, and the filtering stability is high.

[0026] It should be noted that the air floatation unit 1 and the scraper machine 2 are both mature prior art, and will not be described in detail here.

[0027] In an embodiment, the filter plate 31 is a V-shaped plate, and the filter plate 31 abuts against the side wall of the scum collecting area 4 to divide the scum collecting area 4 into a residue area and a residual liquid area, the residue area is located at the top of the filter plate 31, and the residual liquid area is located at the bottom of the filter plate 31. The air flotation unit 1 is provided with a liquid discharge pipe in communication with the residual liquid area.

[0028] In this way, the scum entering the scum collecting area 4 is filtered at the filter plate 31, and the filtered residue can be collected at the lowest point of the V-shaped plate under the action of gravity. When the filter residue suction pipe 32 is located at the lowest point of the V-shaped plate, the filtered residue can be maximally sucked, and the residue discharge efficiency is high.

[0029] In an embodiment, the dredging assembly 33 includes a plurality of supports 331 arranged in the residual liquid area, and a plurality of top pins 332 are arranged on the top of the supports 331 and correspond to the filter holes of the filter plate 31.

[0030] The dredging assembly 33 further includes two inner sleeves 333 arranged at the top of the air flotation unit 1, an outer sleeve 334 capable of moving up and down is arranged on the top of the inner sleeve 333, a compression spring 335 in sleeving connection with the inner sleeve 333 is arranged between the outer sleeve 334 and the air flotation unit 1, a connecting rod 336 is arranged between the two outer sleeves 334, a plurality of pull ropes 337 are arranged between the connecting rod 336 and the filter plate 31, and the top pins 332 are located at the bottom of the filter plate 31 when the compression spring 335 is in a natural state.

[0031] In this way, when the filter holes on the filter plate 31 are not blocked, the liquid can smoothly pass through the filter plate. At this time, the elastic force of the compression spring 335 can support the filter plate 31 to be above the top pins 332. When the filter holes are blocked, the scum continuously entering above the filter plate 31 will increase the weight of the top of the filter plate 31, so that the filter plate 31 gradually moves downward to overcome the elastic force of the compression spring 335, until the top pins 332 are inserted into the filter holes of the filter plate 31, and the dredging of the filter holes is completed. At this time, the delivery pump sucks the residue above the filter plate 31 through the filter residue suction pipe 32, so that the weight above the filter plate 31 is reduced, the filter plate 31 moves upward again, the liquid above the filter plate 31 can flow downward through the filter holes again, and the filter plate 31 can ensure the filtering effect in a long filtering process.

[0032] In an embodiment, the filter residue suction pipe 32 includes a main pipe 321 and a plurality of branch pipes 322. One end of the main pipe 321 is located outside the air flotation unit 1 and connected with the delivery pump. One end of each of the branch pipes 322 is connected with the top of the filter plate 31, and the other end of each of the branch pipes 322 is inserted into the main pipe 321.

[0033] The branch pipe 322 includes a tubular section and an annular stop section. The outer diameter of the annular stop section is larger than the outer diameter of the tubular section, and the annular stop section is arranged at the end of the tubular section located in the main pipe 321. A plurality of feeding holes are formed in the tubular section for the residue on the top of the filter plate 31 to enter.

[0034] In this way, the residue suction pipe 32 can still suck the residue at the lowest position of the filter plate 31 during the movement of the filter plate 31, and the residue suction pipe 32 can preferentially suck the residue deposited at the bottom with low water content during the suction process.

[0035] In an embodiment, the air flotation unit 1 is provided with a monitoring mechanism 5 for monitoring the displacement of the filter plate 31; the monitoring mechanism 5 comprises a photoelectric sensor 51 arranged at the top of the air flotation unit 1 and a baffle 52 arranged on the outer sleeve 334, and when the compression spring 335 is in a natural state, the baffle 52 is located outside the detection area of the photoelectric sensor 51, and when the thimble 332 is inserted into the filter hole, the baffle 52 is located in the detection area of the photoelectric sensor 51.

[0036] In this way, the position of the filter plate 31 is monitored by the monitoring mechanism 5, the photoelectric sensor 51 is associated with the delivery pump controller, so that the delivery pump is started only when the filter hole of the filter plate 31 is blocked or the weight of the floating residue accumulated above the filter plate 31 is too large, ensuring that the delivery pump can suck the residue every time, avoiding idling, and also ensuring that the delivery pump does not need to run continuously for a long time, improving the service life of the delivery pump.

[0037] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0038] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope of the present application.

[0039] In addition, "a plurality of" means two or more.

[0040] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A wastewater treatment device, comprising an air flotation unit (1), wherein the air flotation unit (1) is provided with a scum collection area (4) for temporary storage of scum, and a scraper conveyor (2) is provided on the top of the air flotation unit (1) for conveying scum from the wastewater surface to the scum collection area (4), characterized in that: The scum collection area (4) is equipped with a filtration mechanism (3) for filtering scum; The filtration mechanism (3) includes a filter plate (31) disposed in the scum collection area (4) and a filter scum suction pipe (32) located on top of the filter plate (31). The filtration mechanism (3) also includes a dredging component (33) for unblocking the filter plate (31) when it is clogged.

2. The wastewater treatment equipment according to claim 1, characterized in that: The filter plate (31) is a V-shaped plate, and the filter plate (31) abuts against the side wall of the scum collection area (4), dividing the scum collection area (4) into a residue area and a residual liquid area. The residue area is located at the top of the filter plate (31), and the residual liquid area is located at the bottom of the filter plate (31). The air flotation unit (1) is equipped with a drain pipe that communicates with the residual liquid area.

3. The wastewater treatment equipment according to claim 2, characterized in that: The drainage component (33) includes multiple supports (331) disposed in the residual liquid area, and the top of the supports (331) is provided with multiple pins (332) corresponding to the filter holes of the filter plate (31); The guiding component (33) also includes two inner sleeves (333) set on the top of the air flotation unit (1). The top of the inner sleeve (333) is fitted with an outer sleeve (334) that can move up and down. A compression spring (335) is provided between the outer sleeve (334) and the air flotation unit (1) and is connected to the inner sleeve (333). A connecting rod (336) is provided between the two outer sleeves (334). A plurality of pull ropes (337) are provided between the connecting rod (336) and the filter plate (31). When the compression spring (335) is in its natural state, the pin (332) is located at the bottom of the filter plate (31).

4. The wastewater treatment equipment according to claim 3, characterized in that: The filter residue suction pipe (32) includes a main pipe (321) and multiple branch pipes (322). One end of the main pipe (321) is located outside the air flotation unit (1) and connected to the delivery pump. One end of the branch pipe (322) is connected to the top of the filter plate (31), and the other end of the branch pipe (322) is inserted into the main pipe (321). The branch pipe (322) includes a tubular section and an annular stop section. The outer diameter of the annular stop section is larger than the outer diameter of the tubular section, and the annular stop section is located at one end of the tubular section inside the main pipe (321). The tubular section is provided with multiple feed holes for the residue at the top of the filter plate (31) to enter.

5. The wastewater treatment equipment according to claim 3, characterized in that: The air flotation unit (1) is equipped with a monitoring mechanism (5) for monitoring the displacement of the filter plate (31); the monitoring mechanism (5) includes a photoelectric sensor (51) set on the top of the air flotation unit (1) and a baffle (52) set on the outer sleeve (334). When the compression spring (335) is in its natural state, the baffle (52) is located outside the detection area of ​​the photoelectric sensor (51). When the pin (332) is inserted into the filter hole, the baffle (52) is located within the detection area of ​​the photoelectric sensor (51).

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