CN214141909U

CN214141909U - Papermaking wastewater filtering treatment system

Info

Publication number: CN214141909U
Application number: CN202023330478.0U
Authority: CN
Inventors: 王莹; 吕俊锋; 梁开平
Original assignee: Feicheng Dongsheng Paper Co ltd
Current assignee: Feicheng Dongsheng Paper Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-09-07
Anticipated expiration: 2030-12-30

Abstract

The utility model relates to a papermaking wastewater filtration processing system. The papermaking wastewater filtering treatment system comprises a primary filtering tank, a secondary filtering tank, a decoloring device, a flocculation tank, a primary sedimentation tank, an aeration tank, a secondary sedimentation tank, a water collecting tank and a sludge tank which are connected in sequence; a primary filter tank and a secondary filter tank are arranged in the primary filter tank; a stone filtering layer, a stone filtering layer and a stone particle filtering layer are arranged in the secondary filtering tank; a back-flushing pipeline is arranged on the secondary filtering tank; the decoloring device comprises a physical decoloring tank and a chemical decoloring tank; the outlet of the sludge pool is connected with a dehydrator, and the water outlet of the dehydrator is connected with a water collecting pool; a water drainage pipeline and a water supply pipeline are arranged on the water collecting tank, the water supply pipeline is connected with a water inlet of a back flushing pipeline of the secondary filtering tank, and a water outlet of the back flushing pipeline of the secondary filtering tank is connected with the primary filtering tank through a pipeline. The papermaking wastewater filtering treatment system is scientific and reasonable in structural design, sufficient in treatment, high in treatment efficiency, and drainage in each treatment stage is beneficial to reducing the burden of subsequent treatment.

Description

Papermaking wastewater filtering treatment system

Technical Field

The utility model relates to a papermaking wastewater filtration processing system.

Background

The papermaking wastewater is very harmful, wherein pollutants account for more than 90% of the total amount of pollution emission in the papermaking industry, and the papermaking wastewater is dark in color and much in foam, consumes a large amount of dissolved oxygen in water, seriously pollutes water sources and brings harm to the environment and human health; therefore, the papermaking wastewater needs to be effectively treated and discharged after reaching the standard. In the existing equipment for treating the papermaking wastewater, the whole effect can meet the requirement of discharge after treatment, but because the treatment system is not perfect, the burden and the treatment effect of filtration treatment are increased, the treatment period is prolonged, and the efficiency of wastewater filtration treatment is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a papermaking waste water filtration processing system, structural design scientific and reasonable handles fully, and the drainage in each processing stage is favorable to alleviateing the burden of follow-up processing, and the treatment effeciency is high, has solved the problem that exists among the prior art.

The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be:

a papermaking wastewater filtering treatment system comprises a primary filtering tank, a secondary filtering tank, a decoloring device, a flocculation tank, a primary sedimentation tank, an aeration tank, a secondary sedimentation tank, a water collecting tank and a sludge tank which are connected in sequence through pipelines;

a primary filter screen and a secondary filter screen are sequentially arranged in the primary filter tank from top to bottom at intervals, and the primary filter screen and the secondary filter screen are respectively detachably connected with the inner wall of the primary filter tank; a stone filtering layer, a stone filtering layer and a stone particle filtering layer are sequentially arranged in the secondary filtering tank from top to bottom; a back washing pipeline is arranged on the secondary filtering tank;

the decoloring device comprises a physical decoloring tank and a chemical decoloring tank which are connected in series;

the outlet of the sludge pool is connected with a dehydrator, and the water outlet of the dehydrator is connected with the water collecting pool through a pipeline;

and a water drainage pipeline and a water supply pipeline are arranged on the water collecting tank, and the water supply pipeline is connected with a water inlet of a back flushing pipeline of the secondary filtering tank.

Furthermore, a buffer water tank is arranged between the primary sedimentation tank and the aeration tank, an upper water outlet and a bottom water outlet are arranged on the primary sedimentation tank, an inlet of the buffer water tank is connected with the upper water outlet of the primary sedimentation tank, and an outlet of the buffer water tank is connected with the aeration tank; the bottom water outlet of the primary sedimentation tank is connected with the flocculation tank.

Further, a pump body is arranged on a pipeline connected with the primary sedimentation tank and the flocculation tank. The bottom waste water of the primary sedimentation tank is pumped back to the flocculation tank again for further treatment.

Furthermore, isolation nets are arranged among the stone filtering layer, the stone filtering layer and the stone particle filtering layer and are fixedly connected with the inner wall of the secondary filtering tank; the particle size of the materials in the stone filtering layer, the stone filtering layer and the stone particle filtering layer is reduced in sequence.

Furthermore, a first boss and a second boss are arranged on the inner side wall of the upper part of the primary filter tank, the primary filter screen is arranged on the first boss in a matched mode, and the secondary filter screen is arranged on the second boss in a matched mode; two pull rods are oppositely arranged on the outer side of the primary filter screen, and handles which are arranged at the top ends of the two pull rods and are erected on the top end of the primary filter tank are arranged at the top ends of the two pull rods; two pull rings are oppositely arranged on the outer side of the secondary filter screen.

Further, set up a plurality of active carbon decoloration board post along rivers direction interval in proper order in the physics decoloration pond, active carbon decoloration board post is the cambered surface board post.

Further, chemical decoloration pond and flocculation basin top all set up the fill of adding medicine, set up first stirring piece in the chemical decoloration pond, set up second stirring piece in the flocculation basin.

Further, the first stirring piece comprises a stirring blade connected with the stirring shaft, and the stirring blade comprises a horizontal blade and an inclined blade arranged at the outer end of the horizontal blade at intervals; the second stirring piece comprises a plurality of groups of horizontal blades which are uniformly arranged; the lengths of the adjacent horizontal blades on the first stirring piece and the second stirring piece are different.

Further, the inclined blades of the first stirring piece are inclined at an angle of 45-60 degrees.

Furthermore, a water discharge filter screen is arranged at the water outlet of the secondary filter tank, and the aperture of the water discharge filter screen is smaller than the particle size of the stone particles of the stone particle filter layer.

Further, one-level filter screen and second grade filter screen slope setting respectively, one-level filter screen inclination state and second grade filter screen inclination state are opposite.

Furthermore, all the pipelines of the filtering treatment system are provided with valves.

The utility model has the advantages that:

the utility model discloses a papermaking waste water filtration treatment system makes each stage sewage treatment effect show and promotes through improving the inner structure of elementary filtering ponds system, secondary filter tank, decoloration device, flocculation device etc. can alleviate the processing burden in the follow-up treatment stage greatly. The backwashing device is arranged on the secondary filtering tank, and the treated water for backwashing can be discharged directly, so that the secondary filtering tank is ensured to be clean while water is saved, and the problem that dirt is easily accumulated in the primary filtering stage of the secondary filtering tank is avoided. Through set up the buffering pond between one-level sedimentation tank and aeration tank, make the upper portion water of receiving one-level sedimentation tank in the aeration tank on the one hand, on the other hand carries out flocculation treatment once more to the lower part water that one-level sedimentation tank deposits gradually, has guaranteed the effective processing of sewage before the aeration tank handles, does benefit to the early discharge to reach standard of later stage discharge water. Through carrying out dehydration to the mud in the mud pond, the exhaust moisture gathers into the catch basin, is convenient for follow-up collection to mud, need not to handle separately. The papermaking wastewater filtering treatment system is scientific and reasonable in structural design and sufficient in treatment, treated water discharged in each treatment stage is beneficial to reducing the burden of a subsequent treatment system, and the treatment efficiency is high.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of the primary filtration tank of FIG. 1;

fig. 3 is a schematic top view of the primary strainer shown in fig. 2 with the primary strainer removed.

Wherein, 1 primary filter tank, 2 secondary filter tanks, 3 decoloration devices, 3.1 physical decoloration tanks, 3.2 chemical decoloration tanks, 4 flocculation tanks, 5 primary sedimentation tanks, 6 aeration tanks, 7 secondary sedimentation tanks, 8 water collecting tanks, 9 sludge tanks, 10 primary filter screens, 11 secondary filter screens, 12 first bosses, 13 second bosses, 14 pull rods, 15 handles, 16 pull rings, 17 stone filter layers, 18 stone filter layers, 19 stone filter layers, 20 back flush pipelines, 21 separation nets, 22 drainage filter screens, 23 activated carbon decoloration plate columns, 24 dewaterers, 25 drainage pipelines, 26 water supply pipelines, 27 buffer tanks, 28 chemical feeding hoppers, 29 first stirring pieces, 30 second stirring pieces, 31 horizontal blades and 32 inclined blades.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present invention is explained in detail below by means of specific embodiments and with reference to the attached drawings.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1-3, the papermaking wastewater filtration treatment system comprises a primary filter tank 1, a secondary filter tank 2, a decolorization device 3, a flocculation tank 4, a primary sedimentation tank 5, an aeration tank 6, a secondary sedimentation tank 7, a water collection tank 8 and a sludge tank 9 which are connected in sequence through pipelines; a primary filter screen 10 and a secondary filter screen 11 are sequentially arranged in the primary filter tank 1 from top to bottom at intervals, and the primary filter screen and the secondary filter screen are respectively detachably connected with the inner wall of the primary filter tank; a first boss 12 and a second boss 13 are arranged on the inner side wall of the upper part of the primary filter tank, and the first boss and the second boss are both bosses which are annularly arranged along the inner wall of the primary filter tank; the primary filter screen and the secondary filter screen are respectively arranged in an inclined manner, and the inclined state of the primary filter screen is opposite to that of the secondary filter screen; the first boss and the second boss are respectively connected with the annular boss which is obliquely arranged. The primary filter screen 10 is arranged on the first boss 12 in a matched mode, and the secondary filter screen 11 is arranged on the second boss 13 in a matched mode; two pull rods 14 are oppositely arranged outside the primary filter screen, and handles 15 which are arranged at the top ends of the two pull rods are arranged at the top ends of the primary filter tank; two pull rings 16 are oppositely arranged on the outer side of the secondary filter screen.

A stone filtering layer 17, a stone filtering layer 18 and a stone particle filtering layer 19 are sequentially arranged in the secondary filtering tank from top to bottom; a back washing pipeline 20 is arranged on the secondary filtering tank; isolation nets 21 are arranged among the stone filtering layer, the stone filtering layer and the stone particle filtering layer and are fixedly connected with the inner wall of the secondary filtering tank; the particle size of the materials in the stone filtering layer, the stone filtering layer and the stone particle filtering layer is reduced in sequence. And a water outlet of the secondary filtering tank is provided with a drainage filter screen 22, and the aperture of the drainage filter screen is smaller than the particle size of the stone particles of the stone particle filtering layer. The decoloring device comprises a physical decoloring tank 3.1 and a chemical decoloring tank 3.2 which are arranged in series; a plurality of activated carbon decoloration plate columns 23 are sequentially arranged in the physical decoloration tank along the water flow direction at intervals, and the activated carbon decoloration plate columns are cambered surface plate columns. The outlet of the sludge pool is connected with a dehydrator 24, and the water outlet of the dehydrator is connected with the water collecting pool 8 through a pipeline; a water discharge pipeline 25 and a water supply pipeline 26 are arranged on the water collecting tank, the water supply pipeline is connected with the water inlet of the back flushing pipeline 20 of the secondary filter tank, and the water outlet of the back flushing pipeline of the secondary filter tank is arranged at the water inlet above the primary filter tank 1 through a pipeline.

A buffer water tank 27 is also arranged between the primary sedimentation tank 5 and the aeration tank 6, an upper water outlet and a bottom water outlet are arranged on the primary sedimentation tank, the inlet of the buffer water tank is connected with the upper water outlet of the primary sedimentation tank, and the outlet of the buffer water tank is connected with the aeration tank; the bottom water outlet of the primary sedimentation tank is connected with the flocculation tank. And a pump body is arranged on a pipeline connected with the primary sedimentation tank and the flocculation tank.

The chemical decoloration pond and the flocculation basin top all set up the fill 28 of adding medicine, set up first stirring piece 29 in the chemical decoloration pond, set up second stirring piece 30 in the flocculation basin. The first stirring piece comprises a stirring blade connected with the stirring shaft, and the stirring blade comprises a horizontal blade 31 and an inclined blade 32 arranged at the outer end of the horizontal blade at intervals; the inclined blade of the first stirring piece is inclined at an angle of 50 degrees. The second stirring part comprises a plurality of groups of horizontal blades 31 which are uniformly arranged; the lengths of the adjacent horizontal blades on the first stirring piece and the second stirring piece are different.

The working process is as follows: the papermaking wastewater is conveyed to firstly enter a primary filtering tank 1 and is sequentially filtered by a primary filtering net 5 and a secondary filtering net 6 of the primary filtering tank, so that large-particle impurities and sundries in the papermaking wastewater are primarily filtered and removed, the primary filtering net and the secondary filtering net are arranged in a layered manner, the burden of the secondary filtering net in the using process is avoided, and the primary filtering efficiency is improved; in addition, because one-level filter screen and second grade filter screen set up to opposite direction's tilting, can further promote the filter effect of the most area of filter screen, avoid impurity basically all to scatter and gather in filter screen at different levels influence on the surface and just filter the effect, make the amount of the screening impurity of different positions on the filter screen at different levels on the surface different because of the inclined plane, more be favorable to filtering for a long time and use. The wastewater filtered by the primary filtering tank enters the secondary filtering tank 2 and sequentially passes through the stone filtering layer 17, the stone filtering layer 18 and the stone particle filtering layer 19 with gradually reduced particle sizes, so that impurities with relatively high viscosity and fiber solids in the wastewater are blocked and filtered, and the turbidity of the wastewater is reduced. Then the wastewater sequentially enters a physical decolorizing pool 3.1 and a chemical decolorizing pool 3.2 for complete decolorizing treatment, the physical decolorizing pool adopts an activated carbon decolorizing plate column 23 arranged in a cambered surface, the contact area is effectively increased, the physical decolorizing efficiency is improved, the wastewater filtered by a plurality of layers of activated carbon decolorizing plate columns is fully stirred in the chemical decolorizing pool added with the chemical decolorizing agent and fully contacts with the decolorizing agent, and the supplementary decolorizing is completed again; in the chemical decoloration process, the stirring blades of the first stirring piece 29 are set to be the horizontal blades 31 with different lengths and the inclined blades 32 arranged on the longer horizontal blades, so that the chemical decoloration agent can be effectively stirred when entering the chemical decoloration tank and at the bottom of the mixed chemical decoloration tank, and the condition that the upper part and the lower part of the stirring liquid are easily stirred incompletely is eliminated. After the treatment of decoloration device 3, waste water continues to enter flocculation tank 4 and carries out flocculation reaction, and second stirring piece 30 in the flocculation tank has guaranteed flocculation reaction's abundant, and the flocculation tank effectively gets rid of harmful pollutant compositions such as heavy metal, oil, phosphate, COD through carrying out redox to organic matter or inorganic matter in the waste water. The flocculated wastewater sequentially enters a primary sedimentation tank 5, a buffer water tank 27, an aeration tank 6 and a secondary sedimentation tank 7, and in the process, the flocculated wastewater is continuously treated by activated sludge in the aeration tank, so that organic pollutants are further effectively degraded; owing to set up the buffering pond, the buffering pond collects one-level sedimentation tank upper portion treated water, then gets into the aeration tank, then continues to get back to flocculation basin flocculation treatment once more through the pumping to the moisture of one-level sedimentation tank lower part, so set up, can reduce the settling time of one-level sedimentation tank on the one hand, on the other hand can also guarantee the more thorough of moisture earlier stage treatment before the aeration treatment. After the sludge is precipitated in the secondary sedimentation tank 7, the bottom precipitated sludge is discharged into a sludge tank 9, and the upper water is directly discharged into a water collecting tank 8; sludge in the sludge tank is dewatered by the dewatering machine 24, sludge water is also discharged into the water collecting tank 8, and the sludge water is discharged after being detected to be qualified by a water outlet of the water collecting tank. Because the water treatment in the water collecting tank reaches the standard, in order to save water and improve the wastewater treatment efficiency, when the secondary filter tank 2 needs to be backwashed for a certain period of use, part of water in the water collecting tank can be fully utilized for backwashing, so that the backwashing effect can be achieved, and clean water for backwashing operation can be greatly saved; the drain water of the back flushing pipeline is treated separately. The backwashing process is operated by opening and closing a valve in a drain line 26 connected to the sump and a valve in the backwashing line. When the primary filter screen and the secondary filter screen in the primary filter tank need to be cleaned, the primary filter screen 10 is lifted up through the handle 15, so that the primary filter screen is lifted up from the first boss 12, the primary filter tank is pulled out, and the secondary filter screen 11 can be hooked out through the pull ring 16 to be cleaned. The papermaking wastewater filtering treatment system has the advantages that the treatment is sufficient, the treated water discharged in each treatment stage is favorable for reducing the burden of a subsequent treatment system, and the overall treatment efficiency is high.

The above-mentioned specific embodiments can not be regarded as the restriction to the scope of protection of the utility model, to technical personnel in this technical field, it is right the utility model discloses any replacement improvement or transform that embodiment made all fall within the scope of protection of the utility model.

The parts of the present invention not described in detail are the known techniques of those skilled in the art.

Claims

1. A papermaking wastewater filtering treatment system is characterized by comprising a primary filtering tank, a secondary filtering tank, a decoloring device, a flocculation tank, a primary sedimentation tank, an aeration tank, a secondary sedimentation tank, a water collecting tank and a sludge tank which are connected in sequence through pipelines;

2. The papermaking wastewater filtering treatment system according to claim 1, wherein a buffer water tank is further arranged between the primary sedimentation tank and the aeration tank, an upper water outlet and a bottom water outlet are arranged on the primary sedimentation tank, an inlet of the buffer water tank is connected with the upper water outlet of the primary sedimentation tank, and an outlet of the buffer water tank is connected with the aeration tank; the bottom water outlet of the primary sedimentation tank is connected with the flocculation tank.

3. The papermaking wastewater filtering treatment system according to claim 1, wherein isolation nets are arranged among the stone filtering layer, the stone filtering layer and the stone particle filtering layer, and are fixedly connected with the inner wall of the secondary filtering tank; the particle size of the materials in the stone filtering layer, the stone filtering layer and the stone particle filtering layer is reduced in sequence.

4. The papermaking wastewater filtering treatment system according to claim 1, wherein a first boss and a second boss are arranged on the inner side wall of the upper part of the primary filter tank, the primary filter screen is arranged on the first boss in a matching manner, and the secondary filter screen is arranged on the second boss in a matching manner; two pull rods are oppositely arranged on the outer side of the primary filter screen, and handles which are arranged at the top ends of the two pull rods and are erected on the top end of the primary filter tank are arranged at the top ends of the two pull rods; two pull rings are oppositely arranged on the outer side of the secondary filter screen.

5. The papermaking wastewater filtering treatment system according to claim 1, wherein a plurality of activated carbon decolorizing plate columns are sequentially arranged in the physical decolorizing pool at intervals along the water flow direction, and the activated carbon decolorizing plate columns are cambered plate columns.

6. The papermaking wastewater filtering treatment system according to claim 1, wherein a chemical feeding hopper is arranged on the top of each of the chemical bleaching tank and the flocculation tank, a first stirring piece is arranged in the chemical bleaching tank, and a second stirring piece is arranged in the flocculation tank.

7. The papermaking wastewater filtering treatment system according to claim 6, wherein the first stirring member comprises a stirring blade connected with a stirring shaft, and the stirring blade comprises a horizontal blade and an inclined blade arranged at the outer end of the horizontal blade at intervals; the second stirring piece comprises a plurality of groups of horizontal blades which are uniformly arranged; the lengths of the adjacent horizontal blades on the first stirring piece and the second stirring piece are different.

8. The papermaking wastewater filtering treatment system according to claim 7, wherein the inclined blade of the first stirring member is inclined at an angle of 45 ° to 60 °.

9. The papermaking wastewater filtering treatment system according to claim 1, wherein a drainage screen is arranged at the water outlet of the secondary filtering tank, and the pore size of the drainage screen is smaller than the particle size of the particles in the particle filtering layer.

10. The papermaking wastewater filtering treatment system according to claim 1, wherein the primary strainer and the secondary strainer are respectively disposed in an inclined manner, and the inclined state of the primary strainer is opposite to that of the inclined state of the secondary strainer.