CN206298489U

CN206298489U - Papermaking pulping sewage processing unit

Info

Publication number: CN206298489U
Application number: CN201621399851.9U
Authority: CN
Inventors: 林伟东
Original assignee: Shantou Guanghua Paper Making Co Ltd
Current assignee: Shantou Guanghua Paper Making Co Ltd
Priority date: 2016-12-20
Filing date: 2016-12-20
Publication date: 2017-07-04
Anticipated expiration: 2026-12-20

Abstract

The utility model discloses a kind of papermaking pulping sewage processing unit, it includes being sequentially connected with sewage collecting pool, the first filtering ponds, pH regulating reservoirs, electrolytic flocculation pond, the second filtering ponds, integration MBR reactors；At least one set of positive plate and minus plate being made up of metal material is provided with the pond in the electrolytic flocculation pond, the positive plate and minus plate are connected with power supply respectively, and more than two flocculant dog-houses are provided with above the electrolytic flocculation pond；Also include sludge collecting pit, the sludge collecting pit collects the agglutinating matter in the second filtering ponds, and removes the sewage in flocculate by dewatering system, and the sewage that the dewatering system will be removed sends into pH regulating reservoirs.The utility model can efficiently, economically purify papermaking pulping sewage, be adapted to the popularization and application in papermaking enterprise.

Description

Papermaking pulping sewage processing unit

Technical field

The utility model is related to papermaking wastewater technical field, and in particular to it is a kind of to paper-making pulping when produced sewage enter Row treatment complies with the device of environmental requirement.

Background technology

The waste water of paper mill discharge is distinguished by technological property, can divide three strands of waste water：One is pulping cooking waste liquor, i.e., Black liquid；Two is to share the washing, select of paper pulp after black liquor, also referred to as drift ice, middle section water；Three is the plain boiled water on paper machine.In papermaking In the waste water total amount of factory's discharge, middle section water and plain boiled water water account for 90%, and organic pollution load but only accounts for 20% or so；And black liquor Although water only account for 10%, organic pollution load up to 80%, is a kind of overbasic complicated Pollution System, is easily caused Water pollution and the heavy damage of ecological environment.Therefore, black liquor and middle section water and plain boiled water are made a distinction and makees the special place of specific aim Reason, is that paper mill discharge of wastewater reaches the important prerequisite for meeting environmental requirement.

The composition of black liquor is more complicated, can be generally divided into two kinds of organic matter and inorganic matter.Wherein, organic matter is mainly system Chemical reaction product of the slurry raw material in digestion process, leachable and different degrees of catabolite, account for total solid 65%~70%, include lignin, hemicellulose, humic acid, polysaccharide and fiber degradation thing etc.；Inorganic matter is essentially from boiling Alkali and sulfate, its main component are organic compound sodium, free sodium hydroxide, sodium sulphate, vulcanized sodium, sodium carbonate, thio Sodium sulphate etc., accounts for the 30%~35% of solid content problem.

At present, the processing method of the sewage for being produced to papermaking has various, for example：Acid-precipitation method, alkali plate method, absorption method, electrification Method, membrane processing method etc..But, it is difficult to reach preferable treatment effect merely with a kind of method.Accordingly, it would be desirable to develop one Processing method efficiently, economic is planted, is applied in papermaking enterprise.

Utility model content

The purpose of this utility model is the defect for overcoming above-mentioned prior art, there is provided a kind of papermaking system efficiently, economic Slurry sewage-treatment plant, is adapted to the popularization and application in papermaking enterprise.

To achieve the above object, the utility model is adopted the following technical scheme that：

Papermaking pulping sewage processing unit, sewage collecting pool that it includes being sequentially connected with, the first filtering ponds, pH regulating reservoirs, Electrolysis-flocculation basin, the second filtering ponds, integration MBR reactors；At least one set is provided with the pond of the electrolysis-flocculation basin by gold Positive plate and minus plate that category material is made, the positive plate and minus plate are connected with power supply respectively, the electrolysis-flocculation More than two flocculant dog-houses are provided with above pond；Also include sludge collecting pit, the sludge collecting pit collects the second mistake Agglutinating matter in filter tank, and the sewage in flocculate is removed by dewatering system, the dewatering system send the sewage of removing Enter pH regulating reservoirs.

Preferably, pH meter and agitator are provided with the pond of the pH regulating reservoirs.

Preferably, the flocculant dog-house is sulfate dog-house.

Preferably, the positive plate and minus plate are iron electrode.

Preferably, the inside of second filtering ponds is provided with sand filter blanket, and the sand filter blanket includes filter, is located at filter On the sand bed of material, be evenly distributed with filtering micropore on the filter.

Preferably, the height of the sand bed of material is the 1/3 to 1/4 of the second filtering ponds height.

Preferably, the flocculant dog-house is the cylindrical tube being fixed on the roof of electrolysis-flocculation basin, the cylindrical tube Downward-sloping setting.

Compared with prior art, the beneficial effects of the utility model are：

1st, the utility model first adjusts the pH value of sewage in pH regulating reservoirs, makes the pH value of sewage between 3-4, to carry Flocculation efficiency in electrolysis-flocculation basin high plus after sulfate；In electrolysis-flocculation basin, sewage can be electrolysed and be wadded a quilt with cotton Solidifying, two-step process is carried out simultaneously, not only saves the time, it is often more important that improve flocculation efficiency, no longer needs to add during flocculation Plus other auxiliary agents, such as PAM, PAC, reduce the pollutant of water body.

2nd, the utility model have also been devised the filtering ponds with sand filter blanket to be separated by filtration agglutinating matter, improve flocculate Collection efficiency, and dewater treatment further is carried out to flocculate, the sewage after treatment is returned to pH regulating reservoir circular treatments, Ensure that the sewage of final discharge meets environmental requirement.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Specific embodiment

Below, with reference to accompanying drawing and specific embodiment, the utility model is described further.

Fig. 1 is refer to, a kind of papermaking pulping sewage processing unit of the utility model includes the dirt being sequentially connected with by pipeline Water collecting pit 1, the first filtering ponds 2, pH regulating reservoirs 3, electrolysis-flocculation basin 4, the second filtering ponds 5, integration MBR reactors 6.

The sewage collecting pool 1 is collected from the sewage produced during paper-making pulping.The dirt that sewage collecting pool 1 is collected into Water is delivered to the first filtering ponds by pipeline and switch valve 81.Granule foreign in filter sewage in the first filtering ponds 2.Through Sewage after one filtering ponds 2 are filtered is delivered to pH regulating reservoirs 3 by pipeline and switch valve 82, by sewage in pH regulating reservoirs 3 PH value is adjusted in the range of 3-4, in pH regulating reservoirs 3, the pH value that the pH meter 32 according to bottom of pond portion is measured, by adding hydrochloric acid Or NaOH adjusts pH in OK range, before pH value determination, the agitator 31 first started in pH regulating reservoirs 3 will Sewage stirs, and improves the accuracy of measurement.By the sewage after pH regulations by pipeline and switch valve 83 be delivered to electrolysis- Flocculation basin 4.In electrolysis-flocculation basin 4, with positive plate 41b and minus plate 41a that surface is coated with metallic iron, positive plate 41b It is connected with the both positive and negative polarity of power supply respectively with minus plate 41a.Also, at least two flocculations are provided with the roof of electrolysis-flocculation basin 4 Agent dog-house 42a, 42b.Described flocculant dog-house 42a, 42b are the cylindrical tube being fixed on the roof of electrolysis-flocculation basin, institute State the downward-sloping setting of cylindrical tube.In electrolysis-flocculation basin 4, startup power supply is electrolysed, at the same by the dog-house 42a that flocculates, 42b, preferably with ferric sulfate and aluminum sulfate, can also be selected toward at least two sulfate are put into as flocculant in electrolysis-flocculation basin 4 Take alum etc..In the presence of electrolysis, the reaction of flocculant and sewage is greatly increased, improve flocculation efficiency.Flocculation After reaction, by pump 91 by sediment and sewage transport to the second filtering ponds 5.Sand filter blanket is provided with the pond of second filtering ponds 5, The sand filter blanket includes filter 51, the sand bed of material 52 being located on filter 51, and filtering is evenly distributed with the filter 51 Micropore (figure is not marked), the sand particle diameter of the diameter less than the sand filter blanket of the filtering micropore.The height of the sand bed of material 52 It is the 1/3 to 1/4 of the second filtering ponds height.Flocculate precipitate is trapped within the sand bed of material 52 in the second filtering ponds 5, and sewage is then Flow to bottom of pond.Flocculate precipitate is transported to a dewatering system 7 by pump 92, and the sewage in the second filtering ponds then passes through pipeline Integrated MBR reactors 6 are delivered to switch valve 84, are discharged as clean water after integrated MBR reactors 6 are processed. And dewatering system 7 then carries out dewater treatment to such as younger brother's sediment, the material after dehydration is collected as sludge, and is dehydrated system Sewage after the treatment of system 7 then flows back to circular treatment in pH regulating reservoirs 3 again.

For a person skilled in the art, technical scheme that can be as described above and design, make other each Plant corresponding change and deform, and all these changes and deforms the guarantor that should all belong to the utility model claim Within the scope of shield.

Claims

1. papermaking pulping sewage processing unit, it is characterised in that：Adjusted including being sequentially connected with sewage collecting pool, the first filtering ponds, pH Section pond, electrolysis-flocculation basin, the second filtering ponds, integration MBR reactors；At least one set is provided with the pond of the electrolysis-flocculation basin The positive plate and minus plate being made up of metal material, the positive plate and minus plate are connected with power supply respectively, and the electrolysis- More than two flocculant dog-houses are provided with above flocculation basin；Also include sludge collecting pit, the sludge collecting pit collects the Agglutinating matter in two filtering ponds, and the sewage in flocculate, the dirt that the dewatering system will be removed are removed by dewatering system Water sends into pH regulating reservoirs.

2. papermaking pulping sewage processing unit as claimed in claim 1, it is characterised in that：It is provided with the pond of the pH regulating reservoirs PH meter and agitator.

3. papermaking pulping sewage processing unit as claimed in claim 1, it is characterised in that：The flocculant dog-house is sulfuric acid Salt dog-house.

4. papermaking pulping sewage processing unit as claimed in claim 1, it is characterised in that：The positive plate and minus plate are Iron electrode.

5. papermaking pulping sewage processing unit as claimed in claim 1, it is characterised in that：The inside of second filtering ponds sets There is sand filter blanket, the sand filter blanket includes filter, the sand bed of material being located on filter, filtering is evenly distributed with the filter Micropore.

6. papermaking pulping sewage processing unit as claimed in claim 5, it is characterised in that：The height of the sand bed of material is second The 1/3 to 1/4 of filtering ponds height.

7. papermaking pulping sewage processing unit as claimed in claim 1, it is characterised in that：The flocculant dog-house is fixation Cylindrical tube on the roof of electrolysis-flocculation basin, the downward-sloping setting of cylindrical tube.