CN208201468U - A kind of bamboo pulp white clay recovery system - Google Patents
A kind of bamboo pulp white clay recovery system Download PDFInfo
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- CN208201468U CN208201468U CN201820162487.7U CN201820162487U CN208201468U CN 208201468 U CN208201468 U CN 208201468U CN 201820162487 U CN201820162487 U CN 201820162487U CN 208201468 U CN208201468 U CN 208201468U
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Abstract
The utility model relates to pulping technology for paper-making fields, more particularly to a kind of bamboo pulp white clay recovery system, pre- hanging filter including sequentially connected black liquor slot, alkali recovery furnace and dissolving tank and for separating green mud and the disk filter for separating white clay, the sludge outlet of pre- hanging filter connects green mud slot, the filtrate (liquid of disk filter connects strong white liquor storage, the sludge outlet of disk filter connects white clay slot, the lye feed inlet connection of strong white liquor storage and digester.In alkali collection workshop section, the fusant of alkali recovery furnace burning is dissolved in dissolving tank, it first passes through pre- hanging filter and removes green mud sediment, green mud is avoided to settle on lime in subsequent causticizing reaction and generate interference influence, white liquor passes through disk filter again makes filtered white clay mass dryness fraction improve 10% or more, its residual alkali content is low, and then improves recycle of alkali liquor rate.
Description
Technical field
The utility model relates to pulping technology for paper-making fields, and in particular to a kind of bamboo pulp white clay recovery system.
Background technique
In paper-making pulping, black liquor of pulp making is extracted, is concentrated by evaporation, and burns to obtain fusant in alkali recovery furnace, be dissolved in water or
Referred to as green liquor, main component bring it about causticizing reaction then using sodium carbonate liquor and lime as raw material for sodium carbonate, raw
At sodium hydroxide (caustic soda) solution and precipitation of calcium carbonate, lime deposit therein is known as white clay.
Paper-making pulping divides wood pulp and bamboo pulp again, and wherein bamboo pulp not only has cotton, the wooden dissolving pulp similar or identical physics and chemistry
Property also has unique function because it contains bamboo fiber, the fiber product made of bamboo pulp have good gas permeability,
The characteristics such as water imbibition, wearability, while there is natural antibacterial, antibacterial, anti-mite, deodorization and anti-ultraviolet function again, these are them
Its fiber product does not have function, and therefore, bamboo pulp has very high Development volue.
In the prior art, for bamboo pulp in caustic room, white clay contains certain moisture, since the mass dryness fraction of white clay is relatively low, mistake
In filter treated moisture, residual alkali content is high, and the number of dropouts of alkali is big, and alkali recovery reduces, and not only increases production cost, and
Increase the pollutional load of environment；On the other hand, since the sodium carbonate sediment i.e. green mud contained in green liquor is interference substance,
The sedimentation of subsequent lime can be produced bigger effect, therefore need green mud first carrying out filtration treatment, but green mud is difficult in bamboo pulp
Flocculation sedimentation, green liquor clean-up effect is poor, and it is low to further result in subsequent alkali recovery.
Summary of the invention
The purpose of this utility model is that aiming at the shortcomings in the prior art, and provide one kind can be improved white clay mass dryness fraction,
The high bamboo pulp white clay recovery system of alkali recovery.
A kind of bamboo pulp white clay recovery system, including sequentially connected black liquor slot, alkali recovery furnace and dissolving tank are provided, further include
Disk filter for separating the pre- hanging filter of green liquor and green mud and for separating white liquor and white clay, the pre- hanging mistake
The filtrate (liquid of filter is sequentially connected green liquor storage, causticization reactor, white liquor slot and the disk filter, the pre- hanging filtering
The sludge outlet of machine connects green mud slot, and the filtrate (liquid of the disk filter connects strong white liquor storage, the disk filter
Sludge outlet connects white clay slot, and the strong white liquor storage is connect with the lye feed inlet of the digester.
In above-mentioned technical proposal, if the disk filter includes the main shaft with cavity, is fixed on the main shaft
Dry filtering disk and the distributing valve for being fixed on one end of main shaft, each filtering disk include multiple fan-shaped filterings
Plate, the cavity of the main shaft are along the circumferential direction evenly divided into several passage aisles, each passage aisle with the fan-shaped mistake
The filter chamber of filter plate is connected to.
In above-mentioned technical proposal, the cross section of the passage aisle is in isosceles trapezoid.
In above-mentioned technical proposal, the disk filter further include be fixed on described main shaft one end distributing valve and with it is described
The sealing ring of distributing valve fitting, the sealing ring along the circumferential direction offer several through-holes, each through-hole with corresponding one
Passage aisle is connected, and the shape of each through-hole is isosceles trapezoid.
In above-mentioned technical proposal, the causticization reactor includes green liquor feed inlet and lime slurry feed inlet, the green liquor
Feed inlet is connected to the green liquor storage, and the lime slurry feed inlet connects milk of lime liquid bath.
In above-mentioned technical proposal, blender is provided in the dissolving tank.
The utility model has the beneficial effects that
A kind of bamboo pulp white clay recovery system of the utility model, including sequentially connected black liquor slot, alkali recovery furnace and dissolution
Slot, further includes the pre- hanging filter for separating green liquor and green mud and the disk filter for separating white liquor and white clay, in advance
The filtrate (liquid of hanging filter is sequentially connected green liquor storage, causticization reactor, white liquor slot and disk filter, pre- hanging filter
Sludge outlet connect green mud slot, the filtrate (liquid of disk filter connects strong white liquor storage, and the sludge outlet of disk filter connects
Connect white clay slot, the lye feed inlet connection of strong white liquor storage and digester.The bamboo pulp slurrying of the utility model in alkali collection workshop section,
The fusant of alkali recovery furnace burning is dissolved in dissolving tank, first passes through pre- hanging filter and removes green mud sediment, avoids green mud pair
Lime settles and generates interference influence in subsequent causticizing reaction, and it is anti-that filtered green liquor enters causticization reactor generation causticization
Answer, the white liquor of generation passes through disk filter again and is filtered processing, the disk filter certain pressure and at a temperature of squeeze
Filtering, and filter area is big, substantially increases dehydration rate, so that filtered white clay mass dryness fraction is improved 10% or more, residual alkali content
It is low, and then improve recycle of alkali liquor rate, filtered white liquor can the digester of recycling to decoction system make as lye circulation
With not only reducing costs but also reduce the pollution to environment.
Detailed description of the invention
Using attached drawing, the utility model is described in further detail, but the embodiment in attached drawing is not constituted to the utility model
Any restrictions for those of ordinary skill in the art without creative efforts, can also be according to following attached
Figure obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of bamboo pulp white clay recovery system of the utility model.
Fig. 2 is a kind of structural schematic diagram of the main shaft of the disk filter of bamboo pulp white clay recovery system of the utility model.
Fig. 3 is a kind of structural representation of the sealing ring of the disk filter of bamboo pulp white clay recovery system of the utility model
Figure.
Black liquor slot 1, alkali recovery furnace 2, dissolving tank 3, pre- hanging filter 4；
Disk filter 5, main shaft 51, passage aisle 511, sealing ring 52, through-hole 521；
Green liquor storage 6, causticization reactor 7, white liquor slot 8, green mud slot 9, white clay slot 10, digester 11, strong white liquor storage 12, lime
Lotion slot 13.
Specific embodiment
The utility model is further described with the following Examples.
A kind of bamboo pulp white clay recovery system of the present embodiment, as shown in Figure 1, including sequentially connected black liquor slot 1, alkali collection
Furnace 2 and dissolving tank 3 further include the pre- hanging filter 4 for separating green liquor and green mud and the disk for separating white liquor and white clay
The filtrate (liquid of formula filter 5, pre- hanging filter 4 is sequentially connected green liquor storage 6, causticization reactor 7, white liquor slot 8 and disc type mistake
Filter 5, the sludge outlet of pre- hanging filter 4 connect green mud slot 9, and the filtrate (liquid of disk filter 5 connects strong white liquor storage 12,
The sludge outlet of disk filter 5 connects white clay slot 10, and strong white liquor storage 12 is connect with the lye feed inlet of digester 11.The bamboo pulp
In alkali collection workshop section, the fusant that alkali recovery furnace 2 burns is dissolved in dissolving tank 3 for slurrying, first passes through pre- hanging filter 4 and removes
Green mud sediment, the vacuum degree that pre- hanging filter 4 is arranged is 55kpa~65kpa, and green mud filter effect is good, avoids green mud pair
Lime settles and generates interference influence in subsequent causticizing reaction, and it is anti-that filtered green liquor enters the generation of causticization reactor 7 causticization
It answers, the white liquor of generation passes through disk filter 5 again and is filtered processing, and the disk filter 5 is in certain pressure and temperatures
Filtering is squeezed, and filter area is big, substantially increases dehydration rate, increases filtered white clay mass dryness fraction, residual alkali content is low, in turn
Improve recycle of alkali liquor rate, filtered white liquor can the digester 11 of recycling to decoction system be recycled as lye, both
It reduces costs and reduces the pollution to environment.
In the present embodiment, as shown in Fig. 2, disk filter 5 includes the main shaft 51 with cavity, is fixed on main shaft 51
Several filtering disks and the distributing valve for being fixed on 51 1 ends of main shaft, each filtering disk include multiple fan-shaped filterings
Plate, the cavity of main shaft 51 are along the circumferential direction evenly divided into 16 passage aisles 511, and each passage aisle 511 is filtered with sector
The filter chamber of plate is connected to, and as preferred embodiment, the cross section of each passage aisle 511 is in isosceles trapezoid.It is fan-shaped when work
Filter plate two sides generate certain pressure difference, so that white clay is adsorbed on fanning strip, the white liquor filtered out enters filter chamber, then lead to
Cross 16 passage aisles 511 in 51 cavity of main shaft.Structure design increases filter area, and reduces the resistance of filtering white liquor
Power, so that filter effect is more preferable.
As shown in figure 3, disk filter 5 further includes being fixed on the distributing valve of 51 one end of main shaft and being bonded with distributing valve close
Seal ring 52, sealing ring 52 along the circumferential direction offer 16 through-holes 521, each through-hole 521 and 511 phase of a corresponding passage aisle
Connection, and the shape of each through-hole 521 is isosceles trapezoid.Distributing valve and sealing are entered back by the white liquor that passage aisle 511 flows out
In ring 52, since the shape of through-hole 521 is identical as passage aisle 511, white liquor, which flows through the through-hole 521, keeps structure unchanged, into one
Step reduces fluid resistance, improves 5 dehydration rate of disk filter, make white clay mass dryness fraction compared with prior art and can be improved to 10% with
On.
In the present embodiment, be additionally provided with blender in dissolving tank 3, the fusant that alkali recovery furnace 2 burns in dissolving tank 3 with
Water mixing, obtains green liquor.Causticization reactor 7 includes green liquor feed inlet and lime slurry feed inlet, green liquor feed inlet and green liquor storage 6
Connection, lime slurry feed inlet connect milk of lime liquid bath 13.The green liquor being added in dissolving tank 3 into causticization reactor 7 enters severe
Change reactor 7, and causticizing reaction occurs with lime slurry, generates sodium hydroxide (caustic soda) solution and precipitation of calcium carbonate (white clay).
Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than to this reality
With the limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, this field it is general
Lead to it will be appreciated by the skilled person that can be with the technical solution of the present invention is modified or equivalently replaced, without departing from this
The spirit and scope of utility model technical solution.
Claims (6)
1. a kind of bamboo pulp white clay recovery system, including sequentially connected black liquor slot, alkali recovery furnace and dissolving tank, it is characterised in that:
It further include the pre- hanging filter for separating green liquor and green mud and the disk filter for separating white liquor and white clay, it is described pre-
The filtrate (liquid of hanging filter is sequentially connected green liquor storage, causticization reactor, white liquor slot and the disk filter, the pre-hung
The sludge outlet of formula filter connects green mud slot, and the filtrate (liquid of the disk filter connects strong white liquor storage, the disc type mistake
The sludge outlet of filter connects white clay slot, the lye feed inlet connection of the strong white liquor storage and digester.
2. a kind of bamboo pulp white clay recovery system according to claim 1, it is characterised in that: the disk filter includes tool
Several distribution filtered disks and be fixed on one end of main shaft for having the main shaft of cavity, being fixed on the main shaft
Valve, each filtering disk includes multiple fan-shaped screen plates, and the cavity of the main shaft is along the circumferential direction evenly divided into several
Passage aisle, each passage aisle are connected to the filter chamber of the fan-shaped screen plate.
3. a kind of bamboo pulp white clay recovery system according to claim 2, it is characterised in that: the cross section of the passage aisle is in
Isosceles trapezoid.
4. a kind of bamboo pulp white clay recovery system according to claim 2, it is characterised in that: the disk filter further includes
The sealing ring for being fixed on the distributing valve of described main shaft one end and being bonded with the distributing valve, the sealing ring along the circumferential direction open up
There are several through-holes, each through-hole is connected with a corresponding passage aisle, and the shape of each through-hole is isosceles trapezoid.
5. a kind of bamboo pulp white clay recovery system according to claim 1, it is characterised in that: the causticization reactor includes green
Liquid feed inlet and lime slurry feed inlet, the green liquor feed inlet are connected to the green liquor storage, and the lime slurry feed inlet connects
Connect milk of lime liquid bath.
6. a kind of bamboo pulp white clay recovery system according to claim 1, it is characterised in that: be provided with and stir in the dissolving tank
Mix device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820162487.7U CN208201468U (en) | 2018-01-30 | 2018-01-30 | A kind of bamboo pulp white clay recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820162487.7U CN208201468U (en) | 2018-01-30 | 2018-01-30 | A kind of bamboo pulp white clay recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208201468U true CN208201468U (en) | 2018-12-07 |
Family
ID=64534450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820162487.7U Active CN208201468U (en) | 2018-01-30 | 2018-01-30 | A kind of bamboo pulp white clay recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208201468U (en) |
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2018
- 2018-01-30 CN CN201820162487.7U patent/CN208201468U/en active Active
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