CN214735192U

CN214735192U - Papermaking wastewater treatment system

Info

Publication number: CN214735192U
Application number: CN202120311545.XU
Authority: CN
Inventors: 罗含; 徐辉; 张伟华; 张永泽; 周昌群
Original assignee: Xingang Tianyue Environmental Protection Branch Of Yueyang Forest Paper Co ltd
Current assignee: Hunan Chengtong Tianyue Environmental Protection Technology Co ltd; Yueyang Paper Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-11-16
Anticipated expiration: 2031-02-03

Abstract

The utility model belongs to the technical field of wastewater treatment, in particular to a papermaking wastewater treatment system, which comprises a physicochemical treatment area, a biochemical treatment area, a Fenton oxidation area and an ozone aeration biological filter which are connected in sequence, wherein the physicochemical treatment area comprises a water collecting tank, a coagulation tank and a filter tank which are connected in sequence, the upper end of the water collecting tank is provided with a first filter screen, the water inlet and the water outlet of the filter tank are respectively arranged on two opposite side walls of the filter tank, more than two second filter screens are arranged in the filter tank at intervals along the wastewater flowing direction, and the aperture of the more than two second filter screens is sequentially reduced along the wastewater flowing direction in the filter tank; the utility model has better treatment effect on the papermaking wastewater, and can meet the requirements of high-standard discharge and reuse; waste water flows through in following two above filter screens in proper order, and mud can be attached to on the filter screen to two above filter screens can carry out the filtration step by step to waste water, intercept tiny mud, when guaranteeing that waste water normally flows, have improved the separation effect of mud.

Description

Papermaking wastewater treatment system

Technical Field

The utility model belongs to the technical field of waste water treatment, specifically relate to a papermaking effluent disposal system.

Background

Pulping and papermaking are chemical production processes using plant fibers as raw materials, and in order to complete physical and chemical reactions in the processes, water is often used as a carrier or a medium in production, so papermaking is an industry with great water resource consumption, and papermaking wastewater can be generated while obtaining paper and paperboard. The papermaking wastewater has complex components and poor biodegradability, belongs to industrial wastewater which is difficult to treat, and is one of main industrial pollution sources in China. However, the conventional papermaking wastewater treatment method cannot meet the high-standard discharge and reuse requirements, and the physicochemical treatment is used as the first stage of wastewater treatment, generally, a flocculant is added into the wastewater to flocculate and deposit suspended matters in the wastewater into sludge, and then the wastewater above the wastewater is discharged to separate the sludge.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a effectual papermaking effluent disposal system of sludge separation in materialization treatment.

The utility model discloses a content is including the materialization treatment zone, biochemical treatment district, fenton oxidation area and the ozone biological aerated filter that connect gradually, materialization treatment zone includes the catch basin, coagulation basin and the filtering ponds that connect gradually through the pipeline, the upper end of catch basin can be dismantled and be provided with filter screen one, the water inlet and the delivery port of filtering ponds set up respectively on the relative both sides wall of filtering ponds, be provided with two above filter screen two along the waste water flow direction interval in the filtering ponds, and more than two the aperture of filter screen two reduces in proper order along the waste water flow direction in the filtering ponds.

Furthermore, the bottom of the second filter screen is used as an inclined rotating center, and the upper end of the second filter screen is inclined towards one side of the filter tank, which is provided with the water inlet.

Furthermore, the inner wall of the filtering tank is provided with a slot, the slot is obliquely arranged from the upper end of the filtering tank to the lower end of the filtering tank, and the second filter screen is inserted into the slot.

Furthermore, the side face of the first filter screen extends upwards to form a connecting plate, one end, far away from the first filter screen, of the connecting plate is bent, and the bent portion of the connecting plate is hung on the top of the water collecting tank.

Further, a handle is provided on the bent portion of the connecting plate.

Furthermore, the filter screen is arranged towards the bottom of the water collecting tank in a concave mode.

Furthermore, the materialization treatment area also comprises a stirring device, and a stirring rod of the stirring device is positioned in the coagulation tank.

Furthermore, one side of the coagulation tank is provided with a flocculating agent feeding device, and the outlet end of the flocculating agent feeding device is inclined towards the inside of the coagulation tank.

Furthermore, a supporting layer, a filter material layer and a clear water area are sequentially arranged in the ozone aeration biological filter tank from bottom to top.

Further, the bearing layer comprises cobblestones, volcanic rocks and fine crushed stones which are arranged from bottom to top in sequence.

The utility model has the advantages that: (1) hydroxyl free radicals generated in the Fenton oxidation zone can directionally decompose refractory organic matters in the wastewater into micromolecular organic matters, so that the biodegradability of the wastewater is improved, the degraded organic matters in the wastewater can be further improved by the ozone biological aerated filter, and the biodegradability of the wastewater is improved under the existence of trace ozone, so that the biological treatment effect is enhanced, and the removal of pollutants in the wastewater is facilitated;

(2) the first filter screen is arranged at the upper end of the water collecting tank, so that the wastewater temporarily stored in the water collecting tank can be preliminarily filtered, and particulate matters or flaky impurities in the wastewater are removed, so that the subsequent treatment of the wastewater is facilitated; through setting up the filtering ponds, and set up two above filter screens two along the interval between the waste water flow direction in the filtering ponds, when waste water after mixing with the flocculating agent intensive mixing flows into the filtering ponds in the coagulating ponds, waste water flows through in two above filter screens in proper order, mud in the waste water can be attached to on the filter screen, waste water flow direction reduces in proper order in the filtering ponds is followed in the aperture of two above filter screens two, can carry out filtration step by step to waste water, intercept tiny mud, when guaranteeing waste water normal flow, the separation effect of waste water with mud has been improved, the mud water content after the separation is lower, can simplify the process of the follow-up dehydration of mud.

Drawings

Fig. 1 is a schematic view of the system flow of the present invention.

FIG. 2 is a schematic structural diagram of the intermediate physicochemical treatment zone of the present invention.

In the figure, 10-materialized treatment area; 11-a water collecting tank; 12-a first filter screen; 121-connecting plate; 122-a handle; 13-a coagulation tank; 14-a stirring device; 15-a flocculating agent feeding device; 16-a filtration tank; 17-a second filter screen; 20-a biochemical treatment area; a 30-Fenton oxidation zone; 40-ozone aeration biological filter.

Detailed Description

As shown in the attached drawings 1 and 2, the utility model discloses a materialization treatment area 10, biochemical treatment area 20, fenton oxidation area 30 and ozone aeration biological filter 40 that connect gradually, materialization treatment area 10 includes catch basin 11, coagulating basin 13 and the filtering ponds 16 that connect gradually through the pipeline, the upper end opening part of catch basin 11 can be dismantled and be provided with filter screen 12, the water inlet and the delivery port of filtering ponds 16 set up respectively on the relative both sides wall of filtering ponds 16, be provided with two above filter screen two 17 along the wastewater flow direction interval in the filtering ponds 16, and the aperture of two above filter screen two 17 reduces in proper order along the wastewater flow direction in the filtering ponds 16. The water outlet of the filtering tank 16 is connected with the water inlet end of the biochemical treatment area 20, wastewater flows in along the upper end of the water collecting tank 11, and then sequentially passes through the coagulation tank 13, the filtering tank 16, the biochemical treatment area 20, the Fenton oxidation area 30 and the ozone biological aerated filter 40 for treatment, and finally treated wastewater reaching the standard is discharged from the outlet end of the ozone biological aerated filter 40. The utility model discloses well preferred filter screen two 17 is provided with threely altogether.

The middle biochemical treatment area 20 of the utility model is the prior art, the Fenton oxidation area 30 is a unit for treating wastewater by adopting a Fenton oxidation method, and the mass ratio of hydrogen peroxide to wastewater COD in the Fenton oxidation area 30 is 1:1-1: 8; the molar ratio of hydrogen peroxide to ferrous ions is 4:1-10:1, the reaction residence time is 0.25-0.5h, the reaction pH is controlled to be 3.0-5.0, and the hydroxyl radicals generated in the Fenton oxidation zone 30 can be utilized to directionally decompose refractory organic matters into micromolecular organic matters, so that the biodegradability of the wastewater is improved.

The utility model provides a papermaking wastewater treatment system, through set up fenton oxidation area 30 behind biochemical treatment district 20, the hydroxyl radical that fenton oxidation area 30 produced can be directional decomposes the organic matter of difficult degradation in the waste water into the micromolecule organic matter to promote the biodegradability of waste water; by arranging the ozone biological aerated filter 40 behind the Fenton oxidation zone 30, organic matters in the wastewater can be further degraded, and the biodegradability of the wastewater is improved, the biological treatment effect is enhanced and the removal of pollutants in the wastewater is facilitated under the existence of trace ozone; the utility model discloses combine together materialization, biochemistry, fenton oxidation and biological treatment, progressively handle waste water, it is better to papermaking waste water treatment effect, can satisfy high standard's emission and retrieval and utilization requirement.

The utility model discloses a set up filter screen one 12 in the upper end of catch basin 11, can carry out preliminary filtration to the waste water that flows into the temporary storage in catch basin 11, remove particulate matter or flaky impurity in the waste water, so that the subsequent processing of waste water; by arranging the filter tank 16 and arranging more than two filter screens 17 at intervals in the filter tank 16 along the wastewater flowing direction, when wastewater fully mixed with a flocculating agent in the coagulation tank 13 flows into the filter tank 16, the wastewater sequentially flows through the more than two filter screens 17, sludge in the wastewater can be attached to the filter screens 17, the pore diameters of the more than two filter screens 17 are sequentially reduced along the wastewater flowing direction in the filter tank 16, the wastewater can be filtered step by step, fine sludge is intercepted, the separation effect of the wastewater and the sludge is improved while the normal flowing of the wastewater is ensured, the water content of the separated sludge is lower, and the subsequent dehydration process of the sludge can be simplified; through setting up the water inlet and the delivery port with filtering ponds 16 respectively on the both sides wall that filtering ponds 16 are relative, the flow direction of waste water in filtering ponds 16 is from a side stream to opposite side, then two 17 transverse arrangement of filter screen set up in filtering ponds 16, for the mobile mode from the top down, the utility model discloses be more convenient for clear up the mud on two 17 filter screen and in filtering ponds 16.

The utility model discloses in, more than two the slope of two 17 of filter screens sets up, specifically does, and two 17 of filter screens use its bottom to be the center of rotatory slope, and the upper end of two 17 of filter screens sets up towards filtering ponds 16 and is provided with the lopsidedness of water inlet, and behind filter screen 17 interception mud, mud accessible gravity drops to filtering ponds 16 in to reduce the condition that two 17 of filter screens blockked up, guarantee the normal flow of waste water.

The utility model discloses in, set up the slot on the inner wall of filtering ponds 16, the slot sets up to the slope of 16 lower extremes in filtering ponds 16 upper end along the filtering ponds, two 17 pegs graft of filter screen and set up in the slot. The second filter screen 17 is arranged in an inserted manner, so that the second filter screen 17 can be conveniently detached, and the second filter screen 17 can be conveniently cleaned.

The utility model discloses in, the side of filter screen 12 upwards extends and is provided with connecting plate 121, the one end that filter screen 12 was kept away from to connecting plate 121 is bent and is set up, and the part of buckling of connecting plate 121 hangs at 11 tops of catch basin. Through setting up connecting plate 121 to hang connecting plate 121 bending at the top of catch basin 11, can be convenient for dismantle filter screen 12, thereby be convenient for clean filter screen 12.

The utility model discloses in, be provided with handle 122 on the kink of connecting plate 121, can be convenient for mention filter screen 12.

The utility model discloses in, filter screen 12 is towards the sunken setting in 11 bottoms of catch basin, when filter screen 12 carries out prefilter to waste water, impurity can deposit in the depressed part of filter screen 12 to can avoid the impurity in filter screen 12 to spill over to the outside.

The utility model discloses in, materialization treatment area 10 still includes agitating unit 14, agitating unit 14's puddler is located coagulation pond 13, and is more even to coagulation pond 13 stirring effect, and wherein, one side of coagulation pond 13 is provided with flocculating agent and puts in device 15, and flocculating agent puts in device 15's exit end slope and thoughtlessly congeals the inside setting of pond 13. On the basis of ensuring that the flocculating agent is effectively put into the coagulation tank 13, the normal work of the stirring device 14 is prevented from being interfered. The coagulant preferably comprises polyaluminium chloride and polyacrylamide, wherein the addition amount of the polyaluminium chloride is controlled to be 0.1-1.5 per mill of the volume of the wastewater, and the addition amount of the polyacrylamide is 0.5-5 ppm.

In the utility model, a bearing layer, a filter material layer and a clear water area are arranged in the ozone biological aerated filter 40 from bottom to top in sequence. Wherein: the material of the filter material layer is one or two of activated carbon and ceramsite, the particle size is 4-6mm, and the height of the filter material layer is 3-4 m; the height of the clear water area is 1.0-1.3 m. The bearing layer comprises cobblestones, volcanic rocks and fine broken stones which are arranged from bottom to top in sequence. Wherein: the cobblestone size is 30-45mm, the height of the cobblestone filling layer is 0.1-0.2 m; the particle size of the vesuvianite is 20-30mm, and the height of the vesuvianite filler layer is 0.05-0.15 m; the particle size of the fine crushed stone is 8-15mm, and the height of the filler layer of the fine crushed stone is 0.05-0.15 m. The utility model discloses the degree of consistency of aeration, the stability of filter material and the growth of biomembrane have been guaranteed to well ozone biological aerated filter 40 interior filler distribution furthest to also guaranteed that ozone biological aerated filter 40 lets in this part of organic matter biodegradation, preferred ozone is direct to let in from ozone biological aerated filter 40 bottom, the input of ozone is at 30-70 mg/L.

Claims

1. The utility model provides a papermaking effluent disposal system, characterized by, is including materialization treatment area (10), biochemical treatment area (20), fenton oxidation district (30) and ozone aeration biological filter (40) that connect gradually, materialization treatment area (10) include catch basin (11), coagulation basin (13) and filtering ponds (16) that connect gradually through the pipeline, the upper end of catch basin (11) can be dismantled and be provided with filter screen (12), the water inlet and the delivery port of filtering ponds (16) set up respectively on the both sides wall that filtering ponds (16) are relative, be provided with more than two filter screen two (17) along waste water flow direction interval in filtering ponds (16), and the aperture of two above filter screen two (17) reduces in proper order along filtering ponds (16) interior waste water flow direction.

2. The papermaking wastewater treatment system according to claim 1, wherein the second filter screen (17) has a bottom portion as an inclined rotation center, and an upper end of the second filter screen (17) is inclined toward a side of the filter tank (16) where the water inlet is provided.

3. The papermaking wastewater treatment system according to claim 2, wherein the inner wall of the filtering tank (16) is provided with an insertion slot, the insertion slot is obliquely arranged from the upper end of the filtering tank (16) to the lower end of the filtering tank (16), and the second filter screen (17) is inserted into the insertion slot.

4. The papermaking wastewater treatment system according to claim 1, characterized in that a connecting plate (121) extends upwards from the side of the first filter screen (12), one end of the connecting plate (121) far away from the first filter screen (12) is bent, and the bent part of the connecting plate (121) is hung on the top of the water collecting tank (11).

5. The paper-making waste water treatment system according to claim 4, wherein a handle (122) is provided on the bent portion of the connection plate (121).

6. The papermaking wastewater treatment system according to claim 1, wherein the first filter screen (12) is recessed toward the bottom of the sump (11).

7. The papermaking wastewater treatment system according to any one of claims 1 to 6, characterized in that the materialization treatment zone (10) further comprises a stirring device (14), and a stirring rod of the stirring device (14) is positioned in the coagulation tank (13).

8. The papermaking wastewater treatment system according to claim 7, wherein a flocculant feeding device (15) is provided on one side of the coagulation tank (13), and an outlet end of the flocculant feeding device (15) is disposed obliquely toward the inside of the coagulation tank (13).

9. The paper-making wastewater treatment system according to any one of claims 1 to 6, wherein a support layer, a filter material layer and a clear water region are arranged in the ozone aeration biological filter (40) from bottom to top in sequence.

10. The paper-making wastewater treatment system according to claim 9, wherein said support layer comprises cobblestones, lava stones and fine crushed stones arranged in this order from bottom to top.