Sewage solid-liquid multistage separation pretreatment device

Abstract

The utility model belongs to the technical field of sewage treatment, and particularly relates to a sewage solid-liquid multi-stage separation pretreatment device which comprises a mounting frame, a first-stage filtering module and a second-stage filtering module, and the first-stage filtering module and the second-stage filtering module are both fixedly connected with the interior of the mounting frame. The liquid outlet end of the first-stage filtering module is communicated with the liquid inlet end of the second-stage filtering module through a dirt backflow channel. According to the utility model, a fine-mesh filter bag is adopted for primary filtration to realize preliminary interception, and a high-precision filter element is adopted for secondary filtration to perform deep purification, so that a gradient filtration system with step-by-step interception is formed; the second-stage filter element is provided with a backwashing module, stripped dirt can be directionally guided back to an inlet of a first-stage filter bag during cleaning, the backwashing dirt is secondarily intercepted by the first-stage filter bag, and closed-loop treatment of pollutants is realized; through a dirt backflow mechanism, the blockage loss of the filter element is reduced, the service life is prolonged, backwashing waste liquid is prevented from being discharged, and the waste treatment cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field especially relates to a sewage solid -liquid multistage separation pretreatment device. BACKGROUND

[0002] With the continuous improvement of industrial production and environmental protection requirements, liquid filtration technology is increasingly widely used in the fields of chemical industry, water treatment, food processing and the like. The traditional filter device usually adopts single-stage filtration structure and relies on single filter material (such as filter bag or filter core) to intercept impurities. However, such design has significant defects: the filter material is prone to blockage due to rapid accumulation of pollutants, frequent shutdown and replacement are required, resulting in high maintenance cost and low operation efficiency. In addition, the single-stage filtration precision is limited, and it is difficult to meet the processing requirements of high-purity fluid.

[0003] To improve the filtration performance, a multistage filtration system appears in the prior art, for example, a combination of front coarse filtration and rear fine filtration. However, such system still has the following problems: 1. Insufficient filter core regeneration capacity: the pollutants in the fine filtration unit (such as filter core) are difficult to completely remove, and manual cleaning or direct disposal is required after backwashing, resulting in short service life of filter core and high operation cost; 2. Secondary pollution risk: if the waste liquid containing impurities generated during backwashing is directly discharged, it may increase the subsequent treatment burden, and even cause environmental problems; 3. Poor system synergy: the multistage filtration units operate independently, lack of pollutant cooperative treatment mechanism, and the interception capacity of each stage of filter material is not fully utilized. SUMMARY

[0004] The utility model aims at solving the problems of insufficient filter core regeneration capacity, secondary pollution risk and poor system synergy of the multistage filtration system proposed in the background art, and proposes a sewage solid-liquid multistage separation pretreatment device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A sewage solid-liquid multistage separation pretreatment device, comprising a mounting frame, a first filtration module and a second filtration module, the first filtration module and the second filtration module are fixedly connected with the inside of the mounting frame, the liquid outlet end of the first filtration module is communicated with the liquid inlet end of the second filtration module through a dirt backflow channel, and the liquid outlet end of the second filtration module is communicated with the liquid inlet end of the first filtration module through a backwashing channel.

[0007] The first filtration module comprises a first filter and a filter bag, a liquid inlet pipe is fixedly inserted into the top of the inner wall on one side of the first filter, and a support basket corresponding to the filter bag is fixedly connected in the first filter;

[0008] The secondary filter module comprises a second filter and a plurality of filter cartridges, the plurality of filter cartridges are vertically arranged in the interior of the second filter, and a liquid outlet pipe is fixedly and insertingly arranged at the inner bottom of the second filter;

[0009] The dirt backflow channel comprises a first backflow pipe and a second backflow pipe, both ends of the first backflow pipe and the second backflow pipe are respectively connected with the first filter and the second filter, a secondary inlet valve is threadedly connected to the first backflow pipe, and a first backwashing outlet valve is threadedly connected to the second backflow pipe;

[0010] The backwashing channel comprises a backwashing inlet pipe and a backwashing outlet pipe, the backwashing inlet pipe is fixedly and communicatively connected with the bottom of the inner wall of one side of the second filter, the backwashing outlet pipe is fixedly and communicatively connected with the bottom of the inner wall of one side of the first filter, and a backwashing inlet valve and a second backwashing outlet valve are threadedly connected to the backwashing inlet pipe and the backwashing outlet pipe respectively.

[0011] Preferably, an inlet valve is threadedly connected to the inlet pipe, and an outlet valve is threadedly connected to the outlet pipe.

[0012] Preferably, the top of each of the first filter and the second filter is connected with a filter head cover through a flange plate.

[0013] Preferably, a pressure gauge is threadedly and insertedly arranged on each of the inlet pipe, the outlet pipe, the backwashing inlet pipe and the backwashing outlet pipe.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. Structure optimization: primary filtration adopts a fine-meshed filter bag to realize preliminary interception, secondary filtration adopts a high-precision filter cartridge to realize deep purification, and a gradient filtration system is formed through step-by-step interception;

[0016] 2. Backwashing circulation design: the secondary filter cartridge is provided with a backwashing module, the separated dirt can be directed back to the inlet of the primary filter bag during cleaning, the primary filter bag is used to realize secondary interception of the backwashing dirt, and closed-loop treatment of pollutants is realized;

[0017] 3. Efficient use of resources: through the dirt backflow mechanism, the filter cartridge blockage loss is reduced, the service life is prolonged, the backwashing waste liquid is avoided from being discharged, and the waste disposal cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A structural schematic view of a sewage solid-liquid multistage separation pretreatment device is provided.

[0019] In the figure: 1 mounting frame, 2 first filter, 3 filter bag, 4 liquid inlet pipe, 5 support basket, 6 second filter, 7 filter core, 8 liquid outlet pipe, 9 first backflow pipe, 10 second backflow pipe, 11 secondary inlet valve, 12 first backwash outlet valve, 13 backwash inlet pipe, 14 backwash outlet pipe, 15 backwash inlet valve, 16 second backwash outlet valve, 17 liquid inlet valve, 18 liquid outlet valve, 19 filter head, 20 pressure gauge. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0021] Reference Figure 1 A sewage solid-liquid multistage separation pretreatment device, comprising a mounting frame 1, a first filter module and a second filter module, the first filter module and the second filter module are fixedly connected with the inside of the mounting frame 1, the liquid outlet end of the first filter module is communicated with the liquid inlet end of the second filter module through a dirt backflow channel, and the liquid outlet end of the second filter module is communicated with the liquid inlet end of the first filter module through a backwashing channel.

[0022] In this embodiment, the first filter module comprises a first filter 2 and a filter bag 3, a liquid inlet pipe 4 is fixedly inserted into the top of the inner wall on one side of the first filter 2, and a support basket 5 corresponding to the filter bag 3 is fixedly connected in the first filter 2.

[0023] In this embodiment, the second filter module comprises a second filter 6 and a plurality of filter cores 7, the top of the first filter 2 and the top of the second filter 6 are both connected with a filter head 19 through a flange plate, the plurality of filter cores 7 are vertically arranged in the inside of the second filter 6, a liquid outlet pipe 8 is fixedly inserted into the inner bottom of the second filter 6, a liquid inlet valve 17 is threadedly connected to the liquid inlet pipe 4, and a liquid outlet valve 18 is threadedly connected to the liquid outlet pipe 8.

[0024] In this embodiment, the dirt backflow channel comprises a first backflow pipe 9 and a second backflow pipe 10, the two ends of the first backflow pipe 9 and the second backflow pipe 10 are communicated with the first filter 2 and the second filter 6 respectively, a secondary inlet valve 11 is threadedly connected to the first backflow pipe 9, and a first backwash outlet valve 12 is threadedly connected to the second backflow pipe 10.

[0025] In this embodiment, the backwashing channel comprises a backwash inlet pipe 13 and a backwash outlet pipe 14, a pressure gauge 20 is threadedly inserted into each of the liquid inlet pipe 4, the liquid outlet pipe 8, the backwash inlet pipe 13 and the backwash outlet pipe 14, the backwash inlet pipe 13 is fixedly communicated with the bottom of the inner wall on one side of the second filter 6, the backwash outlet pipe 14 is fixedly communicated with the bottom of the inner wall on one side of the first filter 2, and a backwash inlet valve 15 and a second backwash outlet valve 16 are threadedly connected to the backwash inlet pipe 13 and the backwash outlet pipe 14 respectively.

[0026] In the embodiment, the primary filtering module: adopt fine pore filter bag 3, with larger filtering area, can intercept the larger particles in the liquid. Its unique woven structure and material, ensure effective filtering at the same time, with good anti-clogging performance, reduce the burden of subsequent secondary filtration.

[0027] In the embodiment, the secondary filtering module: by high-precision filter core 7, the liquid after primary filtration is deeply purified, remove the small particles and impurities, meet the processing needs of high cleanliness fluid. Filter core 7 adopts special filter material, has high filtering precision and pollution capacity.

[0028] In the embodiment, the backwashing channel: specially designed for secondary filter core, when filter core 7 needs to be cleaned, by switching to backwashing operation, the dirt attached to the surface of filter core 7 is stripped. The simple backwashing design can realize efficient cleaning effect, ensure that the filtering performance of filter core is restored.

[0029] In the embodiment, the dirt backflow channel: connect the backwashing outlet of secondary filter core 7 and the inlet of primary filter bag 3, in the backwashing process, the dirt stripped from secondary filter core 7 is directed back to the inlet of primary filter bag 3. The impurities in the dirt are intercepted again when passing through the primary filter bag 3, realizing closed-loop treatment of pollutants.

[0030] In the embodiment, the pressure gauge: display the inlet / outlet pressure, judge the filtering condition and backwashing condition by the pressure difference, so as to achieve the effect of judging the daily regular cleaning and backwashing.

[0031] In the embodiment, the structure optimization: primary filtering adopts fine pore filter bag to realize preliminary interception, secondary filtering adopts high-precision filter core to realize deep purification, forming a gradient filtering system of step-by-step interception.

[0032] In the embodiment, the backwashing cycle design: secondary filter core is equipped with backwashing module, when cleaning, the stripped dirt can be directed back to the inlet of primary filter bag, and the primary filter bag is used for secondary interception of backwashing dirt, realizing closed-loop treatment of pollutants.

[0033] In the embodiment, the efficient use of resources: through the dirt backflow mechanism, reduce the clogging loss of filter core, prolong its service life, at the same time, avoid the external discharge of backwashing waste liquid, reduce the waste disposal cost.

[0034] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A sewage solid-liquid multistage separation pretreatment device, comprising a mounting frame (1), a first-stage filtration module and a second-stage filtration module, characterized in that: The primary filter module and the secondary filter module are fixedly connected with the inside of the mounting frame (1), the liquid outlet end of the primary filter module is communicated with the liquid inlet end of the secondary filter module through the dirt backflow channel, and the liquid outlet end of the secondary filter module is communicated with the liquid inlet end of the primary filter module through the backwashing channel. The primary filter module comprises a first filter (2) and a filter bag (3), the top of the inner wall of one side of the first filter (2) is fixedly provided with a liquid inlet pipe (4), and the first filter (2) is fixedly connected with a support basket (5) corresponding to the filter bag (3). The secondary filter module comprises a second filter (6) and a plurality of filter cartridges (7), the plurality of filter cartridges (7) are vertically arranged in the inside of the second filter (6), and the inner bottom of the second filter (6) is fixedly provided with a liquid outlet pipe (8). The dirt backflow channel comprises a first backflow pipe (9) and a second backflow pipe (10), both ends of the first backflow pipe (9) and the second backflow pipe (10) are respectively communicated with the first filter (2) and the second filter (6), the first backflow pipe (9) is screwedly connected with a secondary inlet valve (11), and the second backflow pipe (10) is screwedly connected with a first backwashing outlet valve (12). The backwashing channel comprises a backwashing inlet pipe (13) and a backwashing outlet pipe (14), the backwashing inlet pipe (13) is fixedly communicated with the bottom of the inner wall of one side of the second filter (6), the backwashing outlet pipe (14) is fixedly communicated with the bottom of the inner wall of one side of the first filter (2), and the backwashing inlet pipe (13) and the backwashing outlet pipe (14) are respectively screwedly connected with a backwashing inlet valve (15) and a second backwashing outlet valve (16).

2. The sewage solid-liquid multistage separation pretreatment device according to claim 1, characterized in that: The liquid inlet pipe (4) is screwedly connected with a liquid inlet valve (17), and the liquid outlet pipe (8) is screwedly connected with a liquid outlet valve (18).

3. The sewage solid-liquid multistage separation pretreatment device according to claim 1, characterized in that: The top of the first filter (2) and the top of the second filter (6) are respectively connected with a filter head (19) through flanges.

4. The sewage solid-liquid multistage separation pretreatment device according to claim 1, characterized in that: Pressure gauges (20) are screwedly arranged on the liquid inlet pipe (4), the liquid outlet pipe (8), the backwashing inlet pipe (13) and the backwashing outlet pipe (14).

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